[gentoo-commits] proj/linux-patches:4.2 commit in: /

[Mike Pagano]

commit:     3a0e597bb6b80d0db9567050a1fb2c397c1e3594
Author:     Mike Pagano <mpagano <AT> gentoo <DOT> org>
AuthorDate: Thu Nov  5 23:30:34 2015 +0000
Commit:     Mike Pagano <mpagano <AT> gentoo <DOT> org>
CommitDate: Thu Nov  5 23:30:34 2015 +0000
URL:        https://gitweb.gentoo.org/proj/linux-patches.git/commit/?id=3a0e597b

Removing kdbus as per upstream developers. See http://lwn.net/Articles/663062/

 0000_README                |     4 -
 5015_kdbus-8-12-2015.patch | 34349 -------------------------------------------
 2 files changed, 34353 deletions(-)

diff --git a/0000_README b/0000_README
index d40ecf2..cf9d964 100644
--- a/0000_README
+++ b/0000_README
@@ -110,7 +110,3 @@ Desc:   BFQ v7r8 patch 3 for 4.2: Early Queue Merge (EQM)
 Patch:  5010_enable-additional-cpu-optimizations-for-gcc-4.9.patch
 From:   https://github.com/graysky2/kernel_gcc_patch/
 Desc:   Kernel patch enables gcc >= v4.9 optimizations for additional CPUs.
-
-Patch:  5015_kdbus-8-12-2015.patch
-From:   https://lkml.org
-Desc:   Kernel-level IPC implementation

diff --git a/5015_kdbus-8-12-2015.patch b/5015_kdbus-8-12-2015.patch
deleted file mode 100644
index 4e018f2..0000000
--- a/5015_kdbus-8-12-2015.patch
+++ /dev/null
@@ -1,34349 +0,0 @@
-diff --git a/Documentation/Makefile b/Documentation/Makefile
-index bc05482..e2127a7 100644
---- a/Documentation/Makefile
-+++ b/Documentation/Makefile
-@@ -1,4 +1,4 @@
- subdir-y := accounting auxdisplay blackfin connector \
--	filesystems filesystems ia64 laptops mic misc-devices \
-+	filesystems filesystems ia64 kdbus laptops mic misc-devices \
- 	networking pcmcia prctl ptp spi timers vDSO video4linux \
- 	watchdog
-diff --git a/Documentation/ioctl/ioctl-number.txt b/Documentation/ioctl/ioctl-number.txt
-index 51f4221..ec7c81b 100644
---- a/Documentation/ioctl/ioctl-number.txt
-+++ b/Documentation/ioctl/ioctl-number.txt
-@@ -292,6 +292,7 @@ Code  Seq#(hex)	Include File		Comments
- 0x92	00-0F	drivers/usb/mon/mon_bin.c
- 0x93	60-7F	linux/auto_fs.h
- 0x94	all	fs/btrfs/ioctl.h
-+0x95	all	uapi/linux/kdbus.h	kdbus IPC driver
- 0x97	00-7F	fs/ceph/ioctl.h		Ceph file system
- 0x99	00-0F				537-Addinboard driver
- 					<mailto:buk@××××××××.de>
-diff --git a/Documentation/kdbus/.gitignore b/Documentation/kdbus/.gitignore
-new file mode 100644
-index 0000000..b4a77cc
---- /dev/null
-+++ b/Documentation/kdbus/.gitignore
-@@ -0,0 +1,2 @@
-+*.7
-+*.html
-diff --git a/Documentation/kdbus/Makefile b/Documentation/kdbus/Makefile
-new file mode 100644
-index 0000000..8caffe5
---- /dev/null
-+++ b/Documentation/kdbus/Makefile
-@@ -0,0 +1,44 @@
-+DOCS :=	\
-+	kdbus.xml		\
-+	kdbus.bus.xml		\
-+	kdbus.connection.xml	\
-+	kdbus.endpoint.xml	\
-+	kdbus.fs.xml		\
-+	kdbus.item.xml		\
-+	kdbus.match.xml		\
-+	kdbus.message.xml	\
-+	kdbus.name.xml		\
-+	kdbus.policy.xml	\
-+	kdbus.pool.xml
-+
-+XMLFILES := $(addprefix $(obj)/,$(DOCS))
-+MANFILES := $(patsubst %.xml, %.7, $(XMLFILES))
-+HTMLFILES := $(patsubst %.xml, %.html, $(XMLFILES))
-+
-+XMLTO_ARGS := -m $(srctree)/$(src)/stylesheet.xsl --skip-validation
-+
-+quiet_cmd_db2man = MAN     $@
-+      cmd_db2man = xmlto man $(XMLTO_ARGS) -o $(obj) $<
-+%.7: %.xml
-+	@(which xmlto > /dev/null 2>&1) || \
-+	 (echo "*** You need to install xmlto ***"; \
-+	  exit 1)
-+	$(call cmd,db2man)
-+
-+quiet_cmd_db2html = HTML    $@
-+      cmd_db2html = xmlto html-nochunks $(XMLTO_ARGS) -o $(obj) $<
-+%.html: %.xml
-+	@(which xmlto > /dev/null 2>&1) || \
-+	 (echo "*** You need to install xmlto ***"; \
-+	  exit 1)
-+	$(call cmd,db2html)
-+
-+mandocs: $(MANFILES)
-+
-+htmldocs: $(HTMLFILES)
-+
-+clean-files := $(MANFILES) $(HTMLFILES)
-+
-+# we don't support other %docs targets right now
-+%docs:
-+	@true
-diff --git a/Documentation/kdbus/kdbus.bus.xml b/Documentation/kdbus/kdbus.bus.xml
-new file mode 100644
-index 0000000..83f1198
---- /dev/null
-+++ b/Documentation/kdbus/kdbus.bus.xml
-@@ -0,0 +1,344 @@
-+<?xml version='1.0'?> <!--*-nxml-*-->
-+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
-+        "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
-+
-+<refentry id="kdbus.bus">
-+
-+  <refentryinfo>
-+    <title>kdbus.bus</title>
-+    <productname>kdbus.bus</productname>
-+  </refentryinfo>
-+
-+  <refmeta>
-+    <refentrytitle>kdbus.bus</refentrytitle>
-+    <manvolnum>7</manvolnum>
-+  </refmeta>
-+
-+  <refnamediv>
-+    <refname>kdbus.bus</refname>
-+    <refpurpose>kdbus bus</refpurpose>
-+  </refnamediv>
-+
-+  <refsect1>
-+    <title>Description</title>
-+
-+    <para>
-+      A bus is a resource that is shared between connections in order to
-+      transmit messages (see
-+      <citerefentry>
-+        <refentrytitle>kdbus.message</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>).
-+      Each bus is independent, and operations on the bus will not have any
-+      effect on other buses. A bus is a management entity that controls the
-+      addresses of its connections, their policies and message transactions
-+      performed via this bus.
-+    </para>
-+    <para>
-+      Each bus is bound to the mount instance it was created on. It has a
-+      custom name that is unique across all buses of a domain. In
-+      <citerefentry>
-+        <refentrytitle>kdbus.fs</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>
-+      a bus is presented as a directory. No operations can be performed on
-+      the bus itself; instead you need to perform the operations on an endpoint
-+      associated with the bus. Endpoints are accessible as files underneath the
-+      bus directory. A default endpoint called <constant>bus</constant> is
-+      provided on each bus.
-+    </para>
-+    <para>
-+      Bus names may be chosen freely except for one restriction: the name must
-+      be prefixed with the numeric effective UID of the creator and a dash. This
-+      is required to avoid namespace clashes between different users. When
-+      creating a bus, the name that is passed in must be properly formatted, or
-+      the kernel will refuse creation of the bus. Example:
-+      <literal>1047-foobar</literal> is an acceptable name for a bus
-+      registered by a user with UID 1047. However,
-+      <literal>1024-foobar</literal> is not, and neither is
-+      <literal>foobar</literal>. The UID must be provided in the
-+      user-namespace of the bus owner.
-+    </para>
-+    <para>
-+      To create a new bus, you need to open the control file of a domain and
-+      employ the <constant>KDBUS_CMD_BUS_MAKE</constant> ioctl. The control
-+      file descriptor that was used to issue
-+      <constant>KDBUS_CMD_BUS_MAKE</constant> must not previously have been
-+      used for any other control-ioctl and must be kept open for the entire
-+      life-time of the created bus. Closing it will immediately cleanup the
-+      entire bus and all its associated resources and endpoints. Every control
-+      file descriptor can only be used to create a single new bus; from that
-+      point on, it is not used for any further communication until the final
-+      <citerefentry>
-+        <refentrytitle>close</refentrytitle>
-+        <manvolnum>2</manvolnum>
-+      </citerefentry>
-+      .
-+    </para>
-+    <para>
-+      Each bus will generate a random, 128-bit UUID upon creation. This UUID
-+      will be returned to creators of connections through
-+      <varname>kdbus_cmd_hello.id128</varname> and can be used to uniquely
-+      identify buses, even across different machines or containers. The UUID
-+      will have its variant bits set to <literal>DCE</literal>, and denote
-+      version 4 (random). For more details on UUIDs, see <ulink
-+      url="https://en.wikipedia.org/wiki/Universally_unique_identifier">
-+      the Wikipedia article on UUIDs</ulink>.
-+    </para>
-+
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Creating buses</title>
-+    <para>
-+      To create a new bus, the <constant>KDBUS_CMD_BUS_MAKE</constant>
-+      command is used. It takes a <type>struct kdbus_cmd</type> argument.
-+    </para>
-+    <programlisting>
-+struct kdbus_cmd {
-+  __u64 size;
-+  __u64 flags;
-+  __u64 return_flags;
-+  struct kdbus_item items[0];
-+};
-+    </programlisting>
-+
-+    <para>The fields in this struct are described below.</para>
-+
-+    <variablelist>
-+      <varlistentry>
-+        <term><varname>size</varname></term>
-+        <listitem><para>
-+          The overall size of the struct, including its items.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>flags</varname></term>
-+        <listitem><para>The flags for creation.</para>
-+          <variablelist>
-+            <varlistentry>
-+              <term><constant>KDBUS_MAKE_ACCESS_GROUP</constant></term>
-+              <listitem>
-+                <para>Make the bus file group-accessible.</para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_MAKE_ACCESS_WORLD</constant></term>
-+              <listitem>
-+                <para>Make the bus file world-accessible.</para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_FLAG_NEGOTIATE</constant></term>
-+              <listitem>
-+                <para>
-+                  Requests a set of valid flags for this ioctl. When this bit is
-+                  set, no action is taken; the ioctl will return
-+                  <errorcode>0</errorcode>, and the <varname>flags</varname>
-+                  field will have all bits set that are valid for this command.
-+                  The <constant>KDBUS_FLAG_NEGOTIATE</constant> bit will be
-+                  cleared by the operation.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+          </variablelist>
-+        </listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>return_flags</varname></term>
-+        <listitem><para>
-+          Flags returned by the kernel. Currently unused and always set to
-+          <constant>0</constant> by the kernel.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>items</varname></term>
-+        <listitem>
-+          <para>
-+            The following items (see
-+            <citerefentry>
-+              <refentrytitle>kdbus.item</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>)
-+            are expected for <constant>KDBUS_CMD_BUS_MAKE</constant>.
-+          </para>
-+          <variablelist>
-+            <varlistentry>
-+              <term><constant>KDBUS_ITEM_MAKE_NAME</constant></term>
-+              <listitem>
-+                <para>
-+                  Contains a null-terminated string that identifies the
-+                  bus. The name must be unique across the kdbus domain and
-+                  must start with the effective UID of the caller, followed by
-+                  a '<literal>-</literal>' (dash). This item is mandatory.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_ITEM_BLOOM_PARAMETER</constant></term>
-+              <listitem>
-+                <para>
-+                  Bus-wide bloom parameters passed in a
-+                  <type>struct kdbus_bloom_parameter</type>. These settings are
-+                  copied back to new connections verbatim. This item is
-+                  mandatory. See
-+                  <citerefentry>
-+                    <refentrytitle>kdbus.item</refentrytitle>
-+                    <manvolnum>7</manvolnum>
-+                  </citerefentry>
-+                  for a more detailed description of this item.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_ITEM_ATTACH_FLAGS_SEND</constant></term>
-+              <listitem>
-+                <para>
-+                  An optional item that contains a set of attach flags that are
-+                  returned to connections when they query the bus creator
-+                  metadata. If not set, no metadata is returned.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_ITEM_NEGOTIATE</constant></term>
-+              <listitem><para>
-+                With this item, programs can <emphasis>probe</emphasis> the
-+                kernel for known item types. See
-+                <citerefentry>
-+                  <refentrytitle>kdbus.item</refentrytitle>
-+                  <manvolnum>7</manvolnum>
-+                </citerefentry>
-+                for more details.
-+              </para></listitem>
-+            </varlistentry>
-+          </variablelist>
-+        </listitem>
-+      </varlistentry>
-+    </variablelist>
-+
-+    <para>
-+      Unrecognized items are rejected, and the ioctl will fail with
-+      <varname>errno</varname> set to <constant>EINVAL</constant>.
-+    </para>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Return value</title>
-+    <para>
-+      On success, all mentioned ioctl commands return <errorcode>0</errorcode>;
-+      on error, <errorcode>-1</errorcode> is returned, and
-+      <varname>errno</varname> is set to indicate the error.
-+      If the issued ioctl is illegal for the file descriptor used,
-+      <varname>errno</varname> will be set to <constant>ENOTTY</constant>.
-+    </para>
-+
-+    <refsect2>
-+      <title>
-+        <constant>KDBUS_CMD_BUS_MAKE</constant> may fail with the following
-+        errors
-+      </title>
-+
-+      <variablelist>
-+        <varlistentry>
-+          <term><constant>EBADMSG</constant></term>
-+          <listitem><para>
-+            A mandatory item is missing.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EINVAL</constant></term>
-+          <listitem><para>
-+            The flags supplied in the <constant>struct kdbus_cmd</constant>
-+            are invalid or the supplied name does not start with the current
-+            UID and a '<literal>-</literal>' (dash).
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EEXIST</constant></term>
-+          <listitem><para>
-+            A bus of that name already exists.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>ESHUTDOWN</constant></term>
-+          <listitem><para>
-+            The kdbus mount instance for the bus was already shut down.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EMFILE</constant></term>
-+          <listitem><para>
-+            The maximum number of buses for the current user is exhausted.
-+          </para></listitem>
-+        </varlistentry>
-+      </variablelist>
-+    </refsect2>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>See Also</title>
-+    <simplelist type="inline">
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.connection</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.endpoint</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.fs</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.item</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.message</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.name</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.pool</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+    </simplelist>
-+  </refsect1>
-+</refentry>
-diff --git a/Documentation/kdbus/kdbus.connection.xml b/Documentation/kdbus/kdbus.connection.xml
-new file mode 100644
-index 0000000..4bb5f30
---- /dev/null
-+++ b/Documentation/kdbus/kdbus.connection.xml
-@@ -0,0 +1,1244 @@
-+<?xml version='1.0'?> <!--*-nxml-*-->
-+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
-+        "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
-+
-+<refentry id="kdbus.connection">
-+
-+  <refentryinfo>
-+    <title>kdbus.connection</title>
-+    <productname>kdbus.connection</productname>
-+  </refentryinfo>
-+
-+  <refmeta>
-+    <refentrytitle>kdbus.connection</refentrytitle>
-+    <manvolnum>7</manvolnum>
-+  </refmeta>
-+
-+  <refnamediv>
-+    <refname>kdbus.connection</refname>
-+    <refpurpose>kdbus connection</refpurpose>
-+  </refnamediv>
-+
-+  <refsect1>
-+    <title>Description</title>
-+
-+    <para>
-+      Connections are identified by their <emphasis>connection ID</emphasis>,
-+      internally implemented as a <type>uint64_t</type> counter.
-+      The IDs of every newly created bus start at <constant>1</constant>, and
-+      every new connection will increment the counter by <constant>1</constant>.
-+      The IDs are not reused.
-+    </para>
-+    <para>
-+      In higher level tools, the user visible representation of a connection is
-+      defined by the D-Bus protocol specification as
-+      <constant>":1.&lt;ID&gt;"</constant>.
-+    </para>
-+    <para>
-+      Messages with a specific <type>uint64_t</type> destination ID are
-+      directly delivered to the connection with the corresponding ID. Signal
-+      messages (see
-+      <citerefentry>
-+        <refentrytitle>kdbus.message</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>)
-+      may be addressed to the special destination ID
-+      <constant>KDBUS_DST_ID_BROADCAST</constant> (~0ULL) and will then
-+      potentially be delivered to all currently active connections on the bus.
-+      However, in order to receive any signal messages, clients must subscribe
-+      to them by installing a match (see
-+      <citerefentry>
-+        <refentrytitle>kdbus.match</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>).
-+    </para>
-+    <para>
-+      Messages synthesized and sent directly by the kernel will carry the
-+      special source ID <constant>KDBUS_SRC_ID_KERNEL</constant> (0).
-+    </para>
-+    <para>
-+      In addition to the unique <type>uint64_t</type> connection ID,
-+      established connections can request the ownership of
-+      <emphasis>well-known names</emphasis>, under which they can be found and
-+      addressed by other bus clients. A well-known name is associated with one
-+      and only one connection at a time. See
-+      <citerefentry>
-+        <refentrytitle>kdbus.name</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>
-+      on name acquisition, the name registry, and the validity of names.
-+    </para>
-+    <para>
-+      Messages can specify the special destination ID
-+      <constant>KDBUS_DST_ID_NAME</constant> (0) and carry a well-known name
-+      in the message data. Such a message is delivered to the destination
-+      connection which owns that well-known name.
-+    </para>
-+
-+    <programlisting><![CDATA[
-+  +-------------------------------------------------------------------------+
-+  | +---------------+     +---------------------------+                     |
-+  | | Connection    |     | Message                   | -----------------+  |
-+  | | :1.22         | --> | src: 22                   |                  |  |
-+  | |               |     | dst: 25                   |                  |  |
-+  | |               |     |                           |                  |  |
-+  | |               |     |                           |                  |  |
-+  | |               |     +---------------------------+                  |  |
-+  | |               |                                                    |  |
-+  | |               | <--------------------------------------+           |  |
-+  | +---------------+                                        |           |  |
-+  |                                                          |           |  |
-+  | +---------------+     +---------------------------+      |           |  |
-+  | | Connection    |     | Message                   | -----+           |  |
-+  | | :1.25         | --> | src: 25                   |                  |  |
-+  | |               |     | dst: 0xffffffffffffffff   | -------------+   |  |
-+  | |               |     |  (KDBUS_DST_ID_BROADCAST) |              |   |  |
-+  | |               |     |                           | ---------+   |   |  |
-+  | |               |     +---------------------------+          |   |   |  |
-+  | |               |                                            |   |   |  |
-+  | |               | <--------------------------------------------------+  |
-+  | +---------------+                                            |   |      |
-+  |                                                              |   |      |
-+  | +---------------+     +---------------------------+          |   |      |
-+  | | Connection    |     | Message                   | --+      |   |      |
-+  | | :1.55         | --> | src: 55                   |   |      |   |      |
-+  | |               |     | dst: 0 / org.foo.bar      |   |      |   |      |
-+  | |               |     |                           |   |      |   |      |
-+  | |               |     |                           |   |      |   |      |
-+  | |               |     +---------------------------+   |      |   |      |
-+  | |               |                                     |      |   |      |
-+  | |               | <------------------------------------------+   |      |
-+  | +---------------+                                     |          |      |
-+  |                                                       |          |      |
-+  | +---------------+                                     |          |      |
-+  | | Connection    |                                     |          |      |
-+  | | :1.81         |                                     |          |      |
-+  | | org.foo.bar   |                                     |          |      |
-+  | |               |                                     |          |      |
-+  | |               |                                     |          |      |
-+  | |               | <-----------------------------------+          |      |
-+  | |               |                                                |      |
-+  | |               | <----------------------------------------------+      |
-+  | +---------------+                                                       |
-+  +-------------------------------------------------------------------------+
-+    ]]></programlisting>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Privileged connections</title>
-+    <para>
-+      A connection is considered <emphasis>privileged</emphasis> if the user
-+      it was created by is the same that created the bus, or if the creating
-+      task had <constant>CAP_IPC_OWNER</constant> set when it called
-+      <constant>KDBUS_CMD_HELLO</constant> (see below).
-+    </para>
-+    <para>
-+      Privileged connections have permission to employ certain restricted
-+      functions and commands, which are explained below and in other kdbus
-+      man-pages.
-+    </para>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Activator and policy holder connection</title>
-+    <para>
-+      An <emphasis>activator</emphasis> connection is a placeholder for a
-+      <emphasis>well-known name</emphasis>. Messages sent to such a connection
-+      can be used to start an implementer connection, which will then get all
-+      the messages from the activator copied over. An activator connection
-+      cannot be used to send any message.
-+    </para>
-+    <para>
-+      A <emphasis>policy holder</emphasis> connection only installs a policy
-+      for one or more names. These policy entries are kept active as long as
-+      the connection is alive, and are removed once it terminates. Such a
-+      policy connection type can be used to deploy restrictions for names that
-+      are not yet active on the bus. A policy holder connection cannot be used
-+      to send any message.
-+    </para>
-+    <para>
-+      The creation of activator or policy holder connections is restricted to
-+      privileged users on the bus (see above).
-+    </para>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Monitor connections</title>
-+    <para>
-+      Monitors are eavesdropping connections that receive all the traffic on the
-+      bus, but is invisible to other connections. Such connections have all
-+      properties of any other, regular connection, except for the following
-+      details:
-+    </para>
-+
-+    <itemizedlist>
-+      <listitem><para>
-+        They will get every message sent over the bus, both unicasts and
-+        broadcasts.
-+      </para></listitem>
-+
-+      <listitem><para>
-+        Installing matches for signal messages is neither necessary
-+        nor allowed.
-+      </para></listitem>
-+
-+      <listitem><para>
-+        They cannot send messages or be directly addressed as receiver.
-+      </para></listitem>
-+
-+      <listitem><para>
-+        They cannot own well-known names. Therefore, they also can't operate as
-+        activators.
-+      </para></listitem>
-+
-+      <listitem><para>
-+        Their creation and destruction will not cause
-+        <constant>KDBUS_ITEM_ID_{ADD,REMOVE}</constant> (see
-+        <citerefentry>
-+          <refentrytitle>kdbus.item</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>).
-+      </para></listitem>
-+
-+      <listitem><para>
-+        They are not listed with their unique name in name registry dumps
-+        (see <constant>KDBUS_CMD_NAME_LIST</constant> in
-+        <citerefentry>
-+          <refentrytitle>kdbus.name</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>), so other connections cannot detect the presence of
-+	a monitor.
-+      </para></listitem>
-+    </itemizedlist>
-+    <para>
-+      The creation of monitor connections is restricted to privileged users on
-+      the bus (see above).
-+    </para>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Creating connections</title>
-+    <para>
-+      A connection to a bus is created by opening an endpoint file (see
-+      <citerefentry>
-+        <refentrytitle>kdbus.endpoint</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>)
-+      of a bus and becoming an active client with the
-+      <constant>KDBUS_CMD_HELLO</constant> ioctl. Every connection has a unique
-+      identifier on the bus and can address messages to every other connection
-+      on the same bus by using the peer's connection ID as the destination.
-+    </para>
-+    <para>
-+      The <constant>KDBUS_CMD_HELLO</constant> ioctl takes a <type>struct
-+      kdbus_cmd_hello</type> as argument.
-+    </para>
-+
-+    <programlisting>
-+struct kdbus_cmd_hello {
-+  __u64 size;
-+  __u64 flags;
-+  __u64 return_flags;
-+  __u64 attach_flags_send;
-+  __u64 attach_flags_recv;
-+  __u64 bus_flags;
-+  __u64 id;
-+  __u64 pool_size;
-+  __u64 offset;
-+  __u8 id128[16];
-+  struct kdbus_item items[0];
-+};
-+    </programlisting>
-+
-+    <para>The fields in this struct are described below.</para>
-+
-+    <variablelist>
-+      <varlistentry>
-+        <term><varname>size</varname></term>
-+        <listitem><para>
-+          The overall size of the struct, including its items.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>flags</varname></term>
-+        <listitem>
-+          <para>Flags to apply to this connection</para>
-+          <variablelist>
-+            <varlistentry>
-+              <term><constant>KDBUS_HELLO_ACCEPT_FD</constant></term>
-+              <listitem>
-+                <para>
-+                  When this flag is set, the connection can be sent file
-+                  descriptors as message payload of unicast messages. If it's
-+                  not set, an attempt to send file descriptors will result in
-+                  <constant>-ECOMM</constant> on the sender's side.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_HELLO_ACTIVATOR</constant></term>
-+              <listitem>
-+                <para>
-+                  Make this connection an activator (see above). With this bit
-+                  set, an item of type <constant>KDBUS_ITEM_NAME</constant> has
-+                  to be attached. This item describes the well-known name this
-+                  connection should be an activator for.
-+                  A connection can not be an activator and a policy holder at
-+                  the same time time, so this bit is not allowed together with
-+                  <constant>KDBUS_HELLO_POLICY_HOLDER</constant>.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_HELLO_POLICY_HOLDER</constant></term>
-+              <listitem>
-+                <para>
-+                  Make this connection a policy holder (see above). With this
-+                  bit set, an item of type <constant>KDBUS_ITEM_NAME</constant>
-+                  has to be attached. This item describes the well-known name
-+                  this connection should hold a policy for.
-+                  A connection can not be an activator and a policy holder at
-+                  the same time time, so this bit is not allowed together with
-+                  <constant>KDBUS_HELLO_ACTIVATOR</constant>.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_HELLO_MONITOR</constant></term>
-+              <listitem>
-+                <para>
-+                  Make this connection a monitor connection (see above).
-+                </para>
-+                <para>
-+                  This flag can only be set by privileged bus connections. See
-+                  below for more information.
-+                  A connection can not be monitor and an activator or a policy
-+                  holder at the same time time, so this bit is not allowed
-+                  together with <constant>KDBUS_HELLO_ACTIVATOR</constant> or
-+                  <constant>KDBUS_HELLO_POLICY_HOLDER</constant>.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_FLAG_NEGOTIATE</constant></term>
-+              <listitem>
-+                <para>
-+                  Requests a set of valid flags for this ioctl. When this bit is
-+                  set, no action is taken; the ioctl will return
-+                  <errorcode>0</errorcode>, and the <varname>flags</varname>
-+                  field will have all bits set that are valid for this command.
-+                  The <constant>KDBUS_FLAG_NEGOTIATE</constant> bit will be
-+                  cleared by the operation.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+          </variablelist>
-+        </listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>return_flags</varname></term>
-+        <listitem><para>
-+          Flags returned by the kernel. Currently unused and always set to
-+          <constant>0</constant> by the kernel.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>attach_flags_send</varname></term>
-+        <listitem><para>
-+          Set the bits for metadata this connection permits to be sent to the
-+          receiving peer. Only metadata items that are both allowed to be sent
-+          by the sender and that are requested by the receiver will be attached
-+          to the message.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>attach_flags_recv</varname></term>
-+        <listitem><para>
-+          Request the attachment of metadata for each message received by this
-+          connection. See
-+          <citerefentry>
-+            <refentrytitle>kdbus</refentrytitle>
-+            <manvolnum>7</manvolnum>
-+          </citerefentry>
-+          for information about metadata, and
-+          <citerefentry>
-+            <refentrytitle>kdbus.item</refentrytitle>
-+            <manvolnum>7</manvolnum>
-+          </citerefentry>
-+          regarding items in general.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>bus_flags</varname></term>
-+        <listitem><para>
-+          Upon successful completion of the ioctl, this member will contain the
-+          flags of the bus it connected to.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>id</varname></term>
-+        <listitem><para>
-+          Upon successful completion of the command, this member will contain
-+          the numerical ID of the new connection.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>pool_size</varname></term>
-+        <listitem><para>
-+          The size of the communication pool, in bytes. The pool can be
-+          accessed by calling
-+          <citerefentry>
-+            <refentrytitle>mmap</refentrytitle>
-+            <manvolnum>2</manvolnum>
-+          </citerefentry>
-+          on the file descriptor that was used to issue the
-+          <constant>KDBUS_CMD_HELLO</constant> ioctl.
-+          The pool size of a connection must be greater than
-+          <constant>0</constant> and a multiple of
-+          <constant>PAGE_SIZE</constant>. See
-+          <citerefentry>
-+            <refentrytitle>kdbus.pool</refentrytitle>
-+            <manvolnum>7</manvolnum>
-+          </citerefentry>
-+          for more information.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>offset</varname></term>
-+        <listitem><para>
-+          The kernel will return the offset in the pool where returned details
-+          will be stored. See below.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>id128</varname></term>
-+        <listitem><para>
-+          Upon successful completion of the ioctl, this member will contain the
-+          <emphasis>128-bit UUID</emphasis> of the connected bus.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>items</varname></term>
-+        <listitem>
-+          <para>
-+            Variable list of items containing optional additional information.
-+            The following items are currently expected/valid:
-+          </para>
-+          <variablelist>
-+            <varlistentry>
-+              <term><constant>KDBUS_ITEM_CONN_DESCRIPTION</constant></term>
-+              <listitem>
-+                <para>
-+                  Contains a string that describes this connection, so it can
-+                  be identified later.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_ITEM_NAME</constant></term>
-+              <term><constant>KDBUS_ITEM_POLICY_ACCESS</constant></term>
-+              <listitem>
-+                <para>
-+                  For activators and policy holders only, combinations of
-+                  these two items describe policy access entries. See
-+                  <citerefentry>
-+                    <refentrytitle>kdbus.policy</refentrytitle>
-+                    <manvolnum>7</manvolnum>
-+                  </citerefentry>
-+                  for further details.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_ITEM_CREDS</constant></term>
-+              <term><constant>KDBUS_ITEM_PIDS</constant></term>
-+              <term><constant>KDBUS_ITEM_SECLABEL</constant></term>
-+              <listitem>
-+                <para>
-+                  Privileged bus users may submit these types in order to
-+                  create connections with faked credentials. This information
-+                  will be returned when peer information is queried by
-+                  <constant>KDBUS_CMD_CONN_INFO</constant>. See below for more
-+                  information on retrieving information on connections.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_ITEM_NEGOTIATE</constant></term>
-+              <listitem><para>
-+                With this item, programs can <emphasis>probe</emphasis> the
-+                kernel for known item types. See
-+                <citerefentry>
-+                  <refentrytitle>kdbus.item</refentrytitle>
-+                  <manvolnum>7</manvolnum>
-+                </citerefentry>
-+                for more details.
-+              </para></listitem>
-+            </varlistentry>
-+          </variablelist>
-+
-+          <para>
-+            Unrecognized items are rejected, and the ioctl will fail with
-+            <varname>errno</varname> set to <constant>EINVAL</constant>.
-+          </para>
-+        </listitem>
-+      </varlistentry>
-+    </variablelist>
-+
-+    <para>
-+      At the offset returned in the <varname>offset</varname> field of
-+      <type>struct kdbus_cmd_hello</type>, the kernel will store items
-+      of the following types:
-+    </para>
-+
-+    <variablelist>
-+      <varlistentry>
-+        <term><constant>KDBUS_ITEM_BLOOM_PARAMETER</constant></term>
-+        <listitem>
-+          <para>
-+            Bloom filter parameter as defined by the bus creator.
-+          </para>
-+        </listitem>
-+      </varlistentry>
-+    </variablelist>
-+
-+    <para>
-+      The offset in the pool has to be freed with the
-+      <constant>KDBUS_CMD_FREE</constant> ioctl. See
-+      <citerefentry>
-+        <refentrytitle>kdbus.pool</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>
-+      for further information.
-+    </para>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Retrieving information on a connection</title>
-+    <para>
-+      The <constant>KDBUS_CMD_CONN_INFO</constant> ioctl can be used to
-+      retrieve credentials and properties of the initial creator of a
-+      connection. This ioctl uses the following struct.
-+    </para>
-+
-+    <programlisting>
-+struct kdbus_cmd_info {
-+  __u64 size;
-+  __u64 flags;
-+  __u64 return_flags;
-+  __u64 id;
-+  __u64 attach_flags;
-+  __u64 offset;
-+  __u64 info_size;
-+  struct kdbus_item items[0];
-+};
-+    </programlisting>
-+
-+    <variablelist>
-+      <varlistentry>
-+        <term><varname>size</varname></term>
-+        <listitem><para>
-+          The overall size of the struct, including its items.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>flags</varname></term>
-+        <listitem><para>
-+          Currently, no flags are supported.
-+          <constant>KDBUS_FLAG_NEGOTIATE</constant> is accepted to probe for
-+          valid flags. If set, the ioctl will return <errorcode>0</errorcode>,
-+          and the <varname>flags</varname> field is set to
-+          <constant>0</constant>.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>return_flags</varname></term>
-+        <listitem><para>
-+          Flags returned by the kernel. Currently unused and always set to
-+          <constant>0</constant> by the kernel.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>id</varname></term>
-+        <listitem><para>
-+          The numerical ID of the connection for which information is to be
-+          retrieved. If set to a non-zero value, the
-+          <constant>KDBUS_ITEM_OWNED_NAME</constant> item is ignored.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>attach_flags</varname></term>
-+        <listitem><para>
-+          Specifies which metadata items should be attached to the answer. See
-+          <citerefentry>
-+            <refentrytitle>kdbus.message</refentrytitle>
-+            <manvolnum>7</manvolnum>
-+          </citerefentry>.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>offset</varname></term>
-+        <listitem><para>
-+          When the ioctl returns, this field will contain the offset of the
-+          connection information inside the caller's pool. See
-+          <citerefentry>
-+            <refentrytitle>kdbus.pool</refentrytitle>
-+            <manvolnum>7</manvolnum>
-+          </citerefentry>
-+          for further information.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>info_size</varname></term>
-+        <listitem><para>
-+          The kernel will return the size of the returned information, so
-+          applications can optionally
-+          <citerefentry>
-+            <refentrytitle>mmap</refentrytitle>
-+            <manvolnum>2</manvolnum>
-+          </citerefentry>
-+          specific parts of the pool. See
-+          <citerefentry>
-+            <refentrytitle>kdbus.pool</refentrytitle>
-+            <manvolnum>7</manvolnum>
-+          </citerefentry>
-+          for further information.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>items</varname></term>
-+        <listitem>
-+          <para>
-+            The following items are expected for
-+            <constant>KDBUS_CMD_CONN_INFO</constant>.
-+          </para>
-+          <variablelist>
-+            <varlistentry>
-+              <term><constant>KDBUS_ITEM_OWNED_NAME</constant></term>
-+              <listitem>
-+                <para>
-+                  Contains the well-known name of the connection to look up as.
-+                  This item is mandatory if the <varname>id</varname> field is
-+                  set to 0.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_ITEM_NEGOTIATE</constant></term>
-+              <listitem><para>
-+                With this item, programs can <emphasis>probe</emphasis> the
-+                kernel for known item types. See
-+                <citerefentry>
-+                  <refentrytitle>kdbus.item</refentrytitle>
-+                  <manvolnum>7</manvolnum>
-+                </citerefentry>
-+                for more details.
-+              </para></listitem>
-+            </varlistentry>
-+          </variablelist>
-+          <para>
-+            Unrecognized items are rejected, and the ioctl will fail with
-+            <varname>errno</varname> set to <constant>EINVAL</constant>.
-+          </para>
-+        </listitem>
-+      </varlistentry>
-+    </variablelist>
-+
-+    <para>
-+      When the ioctl returns, the following struct will be stored in the
-+      caller's pool at <varname>offset</varname>. The fields in this struct
-+      are described below.
-+    </para>
-+
-+    <programlisting>
-+struct kdbus_info {
-+  __u64 size;
-+  __u64 id;
-+  __u64 flags;
-+  struct kdbus_item items[0];
-+};
-+    </programlisting>
-+
-+    <variablelist>
-+      <varlistentry>
-+        <term><varname>size</varname></term>
-+        <listitem><para>
-+          The overall size of the struct, including its items.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>id</varname></term>
-+        <listitem><para>
-+          The connection's unique ID.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>flags</varname></term>
-+        <listitem><para>
-+          The connection's flags as specified when it was created.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>items</varname></term>
-+        <listitem>
-+          <para>
-+            Depending on the <varname>flags</varname> field in
-+            <type>struct kdbus_cmd_info</type>, items of types
-+            <constant>KDBUS_ITEM_OWNED_NAME</constant> and
-+            <constant>KDBUS_ITEM_CONN_DESCRIPTION</constant> may follow here.
-+            <constant>KDBUS_ITEM_NEGOTIATE</constant> is also allowed.
-+          </para>
-+        </listitem>
-+      </varlistentry>
-+    </variablelist>
-+
-+    <para>
-+      Once the caller is finished with parsing the return buffer, it needs to
-+      employ the <constant>KDBUS_CMD_FREE</constant> command for the offset, in
-+      order to free the buffer part. See
-+      <citerefentry>
-+        <refentrytitle>kdbus.pool</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>
-+      for further information.
-+    </para>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Getting information about a connection's bus creator</title>
-+    <para>
-+      The <constant>KDBUS_CMD_BUS_CREATOR_INFO</constant> ioctl takes the same
-+      struct as <constant>KDBUS_CMD_CONN_INFO</constant>, but is used to
-+      retrieve information about the creator of the bus the connection is
-+      attached to. The metadata returned by this call is collected during the
-+      creation of the bus and is never altered afterwards, so it provides
-+      pristine information on the task that created the bus, at the moment when
-+      it did so.
-+    </para>
-+    <para>
-+      In response to this call, a slice in the connection's pool is allocated
-+      and filled with an object of type <type>struct kdbus_info</type>,
-+      pointed to by the ioctl's <varname>offset</varname> field.
-+    </para>
-+
-+    <programlisting>
-+struct kdbus_info {
-+  __u64 size;
-+  __u64 id;
-+  __u64 flags;
-+  struct kdbus_item items[0];
-+};
-+    </programlisting>
-+
-+    <variablelist>
-+      <varlistentry>
-+        <term><varname>size</varname></term>
-+        <listitem><para>
-+          The overall size of the struct, including its items.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>id</varname></term>
-+        <listitem><para>
-+          The bus ID.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>flags</varname></term>
-+        <listitem><para>
-+          The bus flags as specified when it was created.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>items</varname></term>
-+        <listitem>
-+          <para>
-+            Metadata information is stored in items here. The item list
-+            contains a <constant>KDBUS_ITEM_MAKE_NAME</constant> item that
-+            indicates the bus name of the calling connection.
-+            <constant>KDBUS_ITEM_NEGOTIATE</constant> is allowed to probe
-+            for known item types.
-+          </para>
-+        </listitem>
-+      </varlistentry>
-+    </variablelist>
-+
-+    <para>
-+      Once the caller is finished with parsing the return buffer, it needs to
-+      employ the <constant>KDBUS_CMD_FREE</constant> command for the offset, in
-+      order to free the buffer part. See
-+      <citerefentry>
-+        <refentrytitle>kdbus.pool</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>
-+      for further information.
-+    </para>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Updating connection details</title>
-+    <para>
-+      Some of a connection's details can be updated with the
-+      <constant>KDBUS_CMD_CONN_UPDATE</constant> ioctl, using the file
-+      descriptor that was used to create the connection. The update command
-+      uses the following struct.
-+    </para>
-+
-+    <programlisting>
-+struct kdbus_cmd {
-+  __u64 size;
-+  __u64 flags;
-+  __u64 return_flags;
-+  struct kdbus_item items[0];
-+};
-+    </programlisting>
-+
-+    <variablelist>
-+      <varlistentry>
-+        <term><varname>size</varname></term>
-+        <listitem><para>
-+          The overall size of the struct, including its items.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>flags</varname></term>
-+        <listitem><para>
-+          Currently, no flags are supported.
-+          <constant>KDBUS_FLAG_NEGOTIATE</constant> is accepted to probe for
-+          valid flags. If set, the ioctl will return <errorcode>0</errorcode>,
-+          and the <varname>flags</varname> field is set to
-+          <constant>0</constant>.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>return_flags</varname></term>
-+        <listitem><para>
-+          Flags returned by the kernel. Currently unused and always set to
-+          <constant>0</constant> by the kernel.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>items</varname></term>
-+        <listitem>
-+          <para>
-+            Items to describe the connection details to be updated. The
-+            following item types are supported.
-+          </para>
-+          <variablelist>
-+            <varlistentry>
-+              <term><constant>KDBUS_ITEM_ATTACH_FLAGS_SEND</constant></term>
-+              <listitem>
-+                <para>
-+                  Supply a new set of metadata items that this connection
-+                  permits to be sent along with messages.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_ITEM_ATTACH_FLAGS_RECV</constant></term>
-+              <listitem>
-+                <para>
-+                  Supply a new set of metadata items that this connection
-+                  requests to be attached to each message.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_ITEM_NAME</constant></term>
-+              <term><constant>KDBUS_ITEM_POLICY_ACCESS</constant></term>
-+              <listitem>
-+                <para>
-+                  Policy holder connections may supply a new set of policy
-+                  information with these items. For other connection types,
-+                  <constant>EOPNOTSUPP</constant> is returned in
-+                  <varname>errno</varname>.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_ITEM_NEGOTIATE</constant></term>
-+              <listitem><para>
-+                With this item, programs can <emphasis>probe</emphasis> the
-+                kernel for known item types. See
-+                <citerefentry>
-+                  <refentrytitle>kdbus.item</refentrytitle>
-+                  <manvolnum>7</manvolnum>
-+                </citerefentry>
-+                for more details.
-+              </para></listitem>
-+            </varlistentry>
-+          </variablelist>
-+
-+          <para>
-+            Unrecognized items are rejected, and the ioctl will fail with
-+            <varname>errno</varname> set to <constant>EINVAL</constant>.
-+          </para>
-+        </listitem>
-+      </varlistentry>
-+    </variablelist>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Termination of connections</title>
-+    <para>
-+      A connection can be terminated by simply calling
-+      <citerefentry>
-+        <refentrytitle>close</refentrytitle>
-+        <manvolnum>2</manvolnum>
-+      </citerefentry>
-+      on its file descriptor. All pending incoming messages will be discarded,
-+      and the memory allocated by the pool will be freed.
-+    </para>
-+
-+    <para>
-+      An alternative way of closing down a connection is via the
-+      <constant>KDBUS_CMD_BYEBYE</constant> ioctl. This ioctl will succeed only
-+      if the message queue of the connection is empty at the time of closing;
-+      otherwise, the ioctl will fail with <varname>errno</varname> set to
-+      <constant>EBUSY</constant>. When this ioctl returns
-+      successfully, the connection has been terminated and won't accept any new
-+      messages from remote peers. This way, a connection can be terminated
-+      race-free, without losing any messages. The ioctl takes an argument of
-+      type <type>struct kdbus_cmd</type>.
-+    </para>
-+
-+    <programlisting>
-+struct kdbus_cmd {
-+  __u64 size;
-+  __u64 flags;
-+  __u64 return_flags;
-+  struct kdbus_item items[0];
-+};
-+    </programlisting>
-+
-+    <variablelist>
-+      <varlistentry>
-+        <term><varname>size</varname></term>
-+        <listitem><para>
-+          The overall size of the struct, including its items.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>flags</varname></term>
-+        <listitem><para>
-+          Currently, no flags are supported.
-+          <constant>KDBUS_FLAG_NEGOTIATE</constant> is accepted to probe for
-+          valid flags. If set, the ioctl will fail with
-+          <varname>errno</varname> set to <constant>EPROTO</constant>, and
-+          the <varname>flags</varname> field is set to <constant>0</constant>.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>return_flags</varname></term>
-+        <listitem><para>
-+          Flags returned by the kernel. Currently unused and always set to
-+          <constant>0</constant> by the kernel.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>items</varname></term>
-+        <listitem>
-+          <para>
-+            The following item types are supported.
-+          </para>
-+          <variablelist>
-+            <varlistentry>
-+              <term><constant>KDBUS_ITEM_NEGOTIATE</constant></term>
-+              <listitem><para>
-+                With this item, programs can <emphasis>probe</emphasis> the
-+                kernel for known item types. See
-+                <citerefentry>
-+                  <refentrytitle>kdbus.item</refentrytitle>
-+                  <manvolnum>7</manvolnum>
-+                </citerefentry>
-+                for more details.
-+              </para></listitem>
-+            </varlistentry>
-+          </variablelist>
-+
-+          <para>
-+            Unrecognized items are rejected, and the ioctl will fail with
-+            <varname>errno</varname> set to <constant>EINVAL</constant>.
-+          </para>
-+        </listitem>
-+      </varlistentry>
-+    </variablelist>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Return value</title>
-+    <para>
-+      On success, all mentioned ioctl commands return <errorcode>0</errorcode>;
-+      on error, <errorcode>-1</errorcode> is returned, and
-+      <varname>errno</varname> is set to indicate the error.
-+      If the issued ioctl is illegal for the file descriptor used,
-+      <varname>errno</varname> will be set to <constant>ENOTTY</constant>.
-+    </para>
-+
-+    <refsect2>
-+      <title>
-+        <constant>KDBUS_CMD_HELLO</constant> may fail with the following
-+        errors
-+      </title>
-+
-+      <variablelist>
-+        <varlistentry>
-+          <term><constant>EFAULT</constant></term>
-+          <listitem><para>
-+            The supplied pool size was 0 or not a multiple of the page size.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EINVAL</constant></term>
-+          <listitem><para>
-+            The flags supplied in <type>struct kdbus_cmd_hello</type>
-+            are invalid.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EINVAL</constant></term>
-+          <listitem><para>
-+            An illegal combination of
-+            <constant>KDBUS_HELLO_MONITOR</constant>,
-+            <constant>KDBUS_HELLO_ACTIVATOR</constant> and
-+            <constant>KDBUS_HELLO_POLICY_HOLDER</constant> was passed in
-+            <varname>flags</varname>.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EINVAL</constant></term>
-+          <listitem><para>
-+            An invalid set of items was supplied.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>ECONNREFUSED</constant></term>
-+          <listitem><para>
-+            The attach_flags_send field did not satisfy the requirements of
-+            the bus.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EPERM</constant></term>
-+          <listitem><para>
-+            A <constant>KDBUS_ITEM_CREDS</constant> items was supplied, but the
-+            current user is not privileged.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>ESHUTDOWN</constant></term>
-+          <listitem><para>
-+            The bus you were trying to connect to has already been shut down.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EMFILE</constant></term>
-+          <listitem><para>
-+            The maximum number of connections on the bus has been reached.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EOPNOTSUPP</constant></term>
-+          <listitem><para>
-+            The endpoint does not support the connection flags supplied in
-+            <type>struct kdbus_cmd_hello</type>.
-+          </para></listitem>
-+        </varlistentry>
-+      </variablelist>
-+    </refsect2>
-+
-+    <refsect2>
-+      <title>
-+        <constant>KDBUS_CMD_BYEBYE</constant> may fail with the following
-+        errors
-+      </title>
-+
-+      <variablelist>
-+        <varlistentry>
-+          <term><constant>EALREADY</constant></term>
-+          <listitem><para>
-+            The connection has already been shut down.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EBUSY</constant></term>
-+          <listitem><para>
-+            There are still messages queued up in the connection's pool.
-+          </para></listitem>
-+        </varlistentry>
-+      </variablelist>
-+    </refsect2>
-+
-+    <refsect2>
-+      <title>
-+        <constant>KDBUS_CMD_CONN_INFO</constant> may fail with the following
-+        errors
-+      </title>
-+
-+      <variablelist>
-+        <varlistentry>
-+          <term><constant>EINVAL</constant></term>
-+          <listitem><para>
-+            Invalid flags, or neither an ID nor a name was provided, or the
-+            name is invalid.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>ESRCH</constant></term>
-+          <listitem><para>
-+            Connection lookup by name failed.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>ENXIO</constant></term>
-+          <listitem><para>
-+            No connection with the provided connection ID found.
-+          </para></listitem>
-+        </varlistentry>
-+      </variablelist>
-+    </refsect2>
-+
-+    <refsect2>
-+      <title>
-+        <constant>KDBUS_CMD_CONN_UPDATE</constant> may fail with the following
-+        errors
-+      </title>
-+
-+      <variablelist>
-+        <varlistentry>
-+          <term><constant>EINVAL</constant></term>
-+          <listitem><para>
-+            Illegal flags or items.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EINVAL</constant></term>
-+          <listitem><para>
-+            Wildcards submitted in policy entries, or illegal sequence
-+            of policy items.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EOPNOTSUPP</constant></term>
-+          <listitem><para>
-+            Operation not supported by connection.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>E2BIG</constant></term>
-+          <listitem><para>
-+            Too many policy items attached.
-+          </para></listitem>
-+        </varlistentry>
-+      </variablelist>
-+    </refsect2>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>See Also</title>
-+    <simplelist type="inline">
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.bus</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.endpoint</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.message</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.name</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.policy</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.pool</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.item</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+    </simplelist>
-+  </refsect1>
-+</refentry>
-diff --git a/Documentation/kdbus/kdbus.endpoint.xml b/Documentation/kdbus/kdbus.endpoint.xml
-new file mode 100644
-index 0000000..6632485
---- /dev/null
-+++ b/Documentation/kdbus/kdbus.endpoint.xml
-@@ -0,0 +1,429 @@
-+<?xml version='1.0'?> <!--*-nxml-*-->
-+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
-+        "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
-+
-+<refentry id="kdbus.endpoint">
-+
-+  <refentryinfo>
-+    <title>kdbus.endpoint</title>
-+    <productname>kdbus.endpoint</productname>
-+  </refentryinfo>
-+
-+  <refmeta>
-+    <refentrytitle>kdbus.endpoint</refentrytitle>
-+    <manvolnum>7</manvolnum>
-+  </refmeta>
-+
-+  <refnamediv>
-+    <refname>kdbus.endpoint</refname>
-+    <refpurpose>kdbus endpoint</refpurpose>
-+  </refnamediv>
-+
-+  <refsect1>
-+    <title>Description</title>
-+
-+    <para>
-+      Endpoints are entry points to a bus (see
-+      <citerefentry>
-+        <refentrytitle>kdbus.bus</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>).
-+      By default, each bus has a default
-+      endpoint called 'bus'. The bus owner has the ability to create custom
-+      endpoints with specific names, permissions, and policy databases
-+      (see below). An endpoint is presented as file underneath the directory
-+      of the parent bus.
-+    </para>
-+    <para>
-+      To create a custom endpoint, open the default endpoint
-+      (<literal>bus</literal>) and use the
-+      <constant>KDBUS_CMD_ENDPOINT_MAKE</constant> ioctl with
-+      <type>struct kdbus_cmd</type>. Custom endpoints always have a policy
-+      database that, by default, forbids any operation. You have to explicitly
-+      install policy entries to allow any operation on this endpoint.
-+    </para>
-+    <para>
-+      Once <constant>KDBUS_CMD_ENDPOINT_MAKE</constant> succeeded, the new
-+      endpoint will appear in the filesystem
-+      (<citerefentry>
-+        <refentrytitle>kdbus.bus</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>), and the used file descriptor will manage the
-+      newly created endpoint resource. It cannot be used to manage further
-+      resources and must be kept open as long as the endpoint is needed. The
-+      endpoint will be terminated as soon as the file descriptor is closed.
-+    </para>
-+    <para>
-+      Endpoint names may be chosen freely except for one restriction: the name
-+      must be prefixed with the numeric effective UID of the creator and a dash.
-+      This is required to avoid namespace clashes between different users. When
-+      creating an endpoint, the name that is passed in must be properly
-+      formatted or the kernel will refuse creation of the endpoint. Example:
-+      <literal>1047-my-endpoint</literal> is an acceptable name for an
-+      endpoint registered by a user with UID 1047. However,
-+      <literal>1024-my-endpoint</literal> is not, and neither is
-+      <literal>my-endpoint</literal>. The UID must be provided in the
-+      user-namespace of the bus.
-+    </para>
-+    <para>
-+      To create connections to a bus, use <constant>KDBUS_CMD_HELLO</constant>
-+      on a file descriptor returned by <function>open()</function> on an
-+      endpoint node. See
-+      <citerefentry>
-+        <refentrytitle>kdbus.connection</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>
-+      for further details.
-+    </para>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Creating custom endpoints</title>
-+    <para>
-+      To create a new endpoint, the
-+      <constant>KDBUS_CMD_ENDPOINT_MAKE</constant> command is used. Along with
-+      the endpoint's name, which will be used to expose the endpoint in the
-+      <citerefentry>
-+        <refentrytitle>kdbus.fs</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>,
-+      the command also optionally takes items to set up the endpoint's
-+      <citerefentry>
-+        <refentrytitle>kdbus.policy</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>.
-+      <constant>KDBUS_CMD_ENDPOINT_MAKE</constant> takes a
-+      <type>struct kdbus_cmd</type> argument.
-+    </para>
-+    <programlisting>
-+struct kdbus_cmd {
-+  __u64 size;
-+  __u64 flags;
-+  __u64 return_flags;
-+  struct kdbus_item items[0];
-+};
-+    </programlisting>
-+
-+    <para>The fields in this struct are described below.</para>
-+
-+    <variablelist>
-+      <varlistentry>
-+        <term><varname>size</varname></term>
-+        <listitem><para>
-+          The overall size of the struct, including its items.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>flags</varname></term>
-+        <listitem><para>The flags for creation.</para>
-+          <variablelist>
-+            <varlistentry>
-+              <term><constant>KDBUS_MAKE_ACCESS_GROUP</constant></term>
-+              <listitem>
-+                <para>Make the endpoint file group-accessible.</para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_MAKE_ACCESS_WORLD</constant></term>
-+              <listitem>
-+                <para>Make the endpoint file world-accessible.</para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_FLAG_NEGOTIATE</constant></term>
-+              <listitem>
-+                <para>
-+                  Requests a set of valid flags for this ioctl. When this bit is
-+                  set, no action is taken; the ioctl will return
-+                  <errorcode>0</errorcode>, and the <varname>flags</varname>
-+                  field will have all bits set that are valid for this command.
-+                  The <constant>KDBUS_FLAG_NEGOTIATE</constant> bit will be
-+                  cleared by the operation.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+          </variablelist>
-+        </listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>return_flags</varname></term>
-+        <listitem><para>
-+          Flags returned by the kernel. Currently unused and always set to
-+          <constant>0</constant> by the kernel.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>items</varname></term>
-+        <listitem>
-+          <para>
-+            The following items are expected for
-+            <constant>KDBUS_CMD_ENDPOINT_MAKE</constant>.
-+          </para>
-+          <variablelist>
-+            <varlistentry>
-+              <term><constant>KDBUS_ITEM_MAKE_NAME</constant></term>
-+              <listitem>
-+                <para>Contains a string to identify the endpoint name.</para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_ITEM_NAME</constant></term>
-+              <term><constant>KDBUS_ITEM_POLICY_ACCESS</constant></term>
-+              <listitem>
-+                <para>
-+                  These items are used to set the policy attached to the
-+                  endpoint. For more details on bus and endpoint policies, see
-+                  <citerefentry>
-+                    <refentrytitle>kdbus.policy</refentrytitle>
-+                    <manvolnum>7</manvolnum>
-+                  </citerefentry>.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+          </variablelist>
-+          <para>
-+            Unrecognized items are rejected, and the ioctl will fail with
-+            <varname>errno</varname> set to <varname>EINVAL</varname>.
-+          </para>
-+        </listitem>
-+      </varlistentry>
-+    </variablelist>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Updating endpoints</title>
-+    <para>
-+      To update an existing endpoint, the
-+      <constant>KDBUS_CMD_ENDPOINT_UPDATE</constant> command is used on the file
-+      descriptor that was used to create the endpoint, using
-+      <constant>KDBUS_CMD_ENDPOINT_MAKE</constant>. The only relevant detail of
-+      the endpoint that can be updated is the policy. When the command is
-+      employed, the policy of the endpoint is <emphasis>replaced</emphasis>
-+      atomically with the new set of rules.
-+      The command takes a <type>struct kdbus_cmd</type> argument.
-+    </para>
-+    <programlisting>
-+struct kdbus_cmd {
-+  __u64 size;
-+  __u64 flags;
-+  __u64 return_flags;
-+  struct kdbus_item items[0];
-+};
-+    </programlisting>
-+
-+    <para>The fields in this struct are described below.</para>
-+
-+    <variablelist>
-+      <varlistentry>
-+        <term><varname>size</varname></term>
-+        <listitem><para>
-+          The overall size of the struct, including its items.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>flags</varname></term>
-+        <listitem><para>
-+          Unused for this command.
-+          <constant>KDBUS_FLAG_NEGOTIATE</constant> is accepted to probe for
-+          valid flags. If set, the ioctl will return <errorcode>0</errorcode>,
-+          and the <varname>flags</varname> field is set to
-+          <constant>0</constant>.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>return_flags</varname></term>
-+        <listitem><para>
-+          Flags returned by the kernel. Currently unused and always set to
-+          <constant>0</constant> by the kernel.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>items</varname></term>
-+        <listitem>
-+          <para>
-+            The following items are expected for
-+            <constant>KDBUS_CMD_ENDPOINT_UPDATE</constant>.
-+          </para>
-+          <variablelist>
-+            <varlistentry>
-+              <term><constant>KDBUS_ITEM_NAME</constant></term>
-+              <term><constant>KDBUS_ITEM_POLICY_ACCESS</constant></term>
-+              <listitem>
-+                <para>
-+                  These items are used to set the policy attached to the
-+                  endpoint. For more details on bus and endpoint policies, see
-+                  <citerefentry>
-+                    <refentrytitle>kdbus.policy</refentrytitle>
-+                    <manvolnum>7</manvolnum>
-+                  </citerefentry>.
-+                  Existing policy is atomically replaced with the new rules
-+                  provided.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_ITEM_NEGOTIATE</constant></term>
-+              <listitem><para>
-+                With this item, programs can <emphasis>probe</emphasis> the
-+                kernel for known item types. See
-+                <citerefentry>
-+                  <refentrytitle>kdbus.item</refentrytitle>
-+                  <manvolnum>7</manvolnum>
-+                </citerefentry>
-+                for more details.
-+              </para></listitem>
-+            </varlistentry>
-+          </variablelist>
-+          <para>
-+            Unrecognized items are rejected, and the ioctl will fail with
-+            <varname>errno</varname> set to <constant>EINVAL</constant>.
-+          </para>
-+        </listitem>
-+      </varlistentry>
-+    </variablelist>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Return value</title>
-+    <para>
-+      On success, all mentioned ioctl commands return <errorcode>0</errorcode>;
-+      on error, <errorcode>-1</errorcode> is returned, and
-+      <varname>errno</varname> is set to indicate the error.
-+      If the issued ioctl is illegal for the file descriptor used,
-+      <varname>errno</varname> will be set to <constant>ENOTTY</constant>.
-+    </para>
-+
-+    <refsect2>
-+      <title>
-+        <constant>KDBUS_CMD_ENDPOINT_MAKE</constant> may fail with the
-+        following errors
-+      </title>
-+
-+      <variablelist>
-+        <varlistentry>
-+          <term><constant>EINVAL</constant></term>
-+          <listitem><para>
-+            The flags supplied in the <type>struct kdbus_cmd</type>
-+            are invalid.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EINVAL</constant></term>
-+          <listitem><para>
-+            Illegal combination of <constant>KDBUS_ITEM_NAME</constant> and
-+            <constant>KDBUS_ITEM_POLICY_ACCESS</constant> was provided.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EEXIST</constant></term>
-+          <listitem><para>
-+            An endpoint of that name already exists.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EPERM</constant></term>
-+          <listitem><para>
-+            The calling user is not privileged. See
-+            <citerefentry>
-+              <refentrytitle>kdbus</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>
-+            for information about privileged users.
-+          </para></listitem>
-+        </varlistentry>
-+      </variablelist>
-+    </refsect2>
-+
-+    <refsect2>
-+      <title>
-+        <constant>KDBUS_CMD_ENDPOINT_UPDATE</constant> may fail with the
-+        following errors
-+      </title>
-+
-+      <variablelist>
-+        <varlistentry>
-+          <term><constant>EINVAL</constant></term>
-+          <listitem><para>
-+            The flags supplied in <type>struct kdbus_cmd</type>
-+            are invalid.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EINVAL</constant></term>
-+          <listitem><para>
-+            Illegal combination of <constant>KDBUS_ITEM_NAME</constant> and
-+            <constant>KDBUS_ITEM_POLICY_ACCESS</constant> was provided.
-+          </para></listitem>
-+        </varlistentry>
-+      </variablelist>
-+    </refsect2>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>See Also</title>
-+    <simplelist type="inline">
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.bus</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.endpoint</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.fs</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.item</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.message</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.name</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.pool</refentrytitle>
-+           <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+    </simplelist>
-+  </refsect1>
-+</refentry>
-diff --git a/Documentation/kdbus/kdbus.fs.xml b/Documentation/kdbus/kdbus.fs.xml
-new file mode 100644
-index 0000000..8c2a90e
---- /dev/null
-+++ b/Documentation/kdbus/kdbus.fs.xml
-@@ -0,0 +1,124 @@
-+<?xml version='1.0'?> <!--*-nxml-*-->
-+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
-+        "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
-+
-+<refentry id="kdbus_fs">
-+
-+  <refentryinfo>
-+    <title>kdbus.fs</title>
-+    <productname>kdbus.fs</productname>
-+  </refentryinfo>
-+
-+  <refmeta>
-+    <refentrytitle>kdbus.fs</refentrytitle>
-+    <manvolnum>7</manvolnum>
-+  </refmeta>
-+
-+  <refnamediv>
-+    <refname>kdbus.fs</refname>
-+    <refpurpose>kdbus file system</refpurpose>
-+  </refnamediv>
-+
-+  <refsect1>
-+    <title>File-system Layout</title>
-+
-+    <para>
-+      The <emphasis>kdbusfs</emphasis> pseudo filesystem provides access to
-+      kdbus entities, such as <emphasis>buses</emphasis> and
-+      <emphasis>endpoints</emphasis>. Each time the filesystem is mounted,
-+      a new, isolated kdbus instance is created, which is independent from the
-+      other instances.
-+    </para>
-+    <para>
-+      The system-wide standard mount point for <emphasis>kdbusfs</emphasis> is
-+      <constant>/sys/fs/kdbus</constant>.
-+    </para>
-+
-+    <para>
-+      Buses are represented as directories in the file system layout, whereas
-+      endpoints are exposed as files inside these directories. At the top-level,
-+      a <emphasis>control</emphasis> node is present, which can be opened to
-+      create new buses via the <constant>KDBUS_CMD_BUS_MAKE</constant> ioctl.
-+      Each <emphasis>bus</emphasis> shows a default endpoint called
-+      <varname>bus</varname>, which can be opened to either create a connection
-+      with the <constant>KDBUS_CMD_HELLO</constant> ioctl, or to create new
-+      custom endpoints for the bus with
-+      <constant>KDBUS_CMD_ENDPOINT_MAKE</constant>. See
-+      <citerefentry>
-+        <refentrytitle>kdbus.bus</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>,
-+      <citerefentry>
-+        <refentrytitle>kdbus.connection</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry> and
-+      <citerefentry>
-+        <refentrytitle>kdbus.endpoint</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>
-+      for more details.
-+    </para>
-+
-+    <para>Following, you can see an example layout of the
-+    <emphasis>kdbusfs</emphasis> filesystem:</para>
-+
-+<programlisting>
-+        /sys/fs/kdbus/                          ; mount-point
-+        |-- 0-system                            ; bus directory
-+        |   |-- bus                             ; default endpoint
-+        |   `-- 1017-custom                     ; custom endpoint
-+        |-- 1000-user                           ; bus directory
-+        |   |-- bus                             ; default endpoint
-+        |   |-- 1000-service-A                  ; custom endpoint
-+        |   `-- 1000-service-B                  ; custom endpoint
-+        `-- control                             ; control file
-+</programlisting>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Mounting instances</title>
-+    <para>
-+      In order to get a new and separate kdbus environment, a new instance
-+      of <emphasis>kdbusfs</emphasis> can be mounted like this:
-+    </para>
-+<programlisting>
-+  # mount -t kdbusfs kdbusfs /tmp/new_kdbus/
-+</programlisting>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>See Also</title>
-+    <simplelist type="inline">
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.bus</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.connection</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.endpoint</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>mount</refentrytitle>
-+          <manvolnum>8</manvolnum>
-+        </citerefentry>
-+      </member>
-+    </simplelist>
-+  </refsect1>
-+</refentry>
-diff --git a/Documentation/kdbus/kdbus.item.xml b/Documentation/kdbus/kdbus.item.xml
-new file mode 100644
-index 0000000..ee09dfa
---- /dev/null
-+++ b/Documentation/kdbus/kdbus.item.xml
-@@ -0,0 +1,839 @@
-+<?xml version='1.0'?> <!--*-nxml-*-->
-+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
-+        "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
-+
-+<refentry id="kdbus">
-+
-+  <refentryinfo>
-+    <title>kdbus.item</title>
-+    <productname>kdbus item</productname>
-+  </refentryinfo>
-+
-+  <refmeta>
-+    <refentrytitle>kdbus.item</refentrytitle>
-+    <manvolnum>7</manvolnum>
-+  </refmeta>
-+
-+  <refnamediv>
-+    <refname>kdbus.item</refname>
-+    <refpurpose>kdbus item structure, layout and usage</refpurpose>
-+  </refnamediv>
-+
-+  <refsect1>
-+    <title>Description</title>
-+
-+    <para>
-+      To flexibly augment transport structures, data blobs of type
-+      <type>struct kdbus_item</type> can be attached to the structs passed
-+      into the ioctls. Some ioctls make items of certain types mandatory,
-+      others are optional. Items that are unsupported by ioctls they are
-+      attached to will cause the ioctl to fail with <varname>errno</varname>
-+      set to <constant>EINVAL</constant>.
-+      Items are also used for information stored in a connection's
-+      <emphasis>pool</emphasis>, such as received messages, name lists or
-+      requested connection or bus owner information. Depending on the type of
-+      an item, its total size is either fixed or variable.
-+    </para>
-+
-+    <refsect2>
-+      <title>Chaining items</title>
-+      <para>
-+        Whenever items are used as part of the kdbus kernel API, they are
-+        embedded in structs that are embedded inside structs that themselves
-+        include a size field containing the overall size of the structure.
-+        This allows multiple items to be chained up, and an item iterator
-+        (see below) is capable of detecting the end of an item chain.
-+      </para>
-+    </refsect2>
-+
-+    <refsect2>
-+      <title>Alignment</title>
-+      <para>
-+        The kernel expects all items to be aligned to 8-byte boundaries.
-+        Unaligned items will cause the ioctl they are used with to fail
-+        with <varname>errno</varname> set to <constant>EINVAL</constant>.
-+        An item that has an unaligned size itself hence needs to be padded
-+        if it is followed by another item.
-+      </para>
-+    </refsect2>
-+
-+    <refsect2>
-+      <title>Iterating items</title>
-+      <para>
-+        A simple iterator would iterate over the items until the items have
-+        reached the embedding structure's overall size. An example
-+        implementation is shown below.
-+      </para>
-+
-+      <programlisting><![CDATA[
-+#define KDBUS_ALIGN8(val) (((val) + 7) & ~7)
-+
-+#define KDBUS_ITEM_NEXT(item) \
-+    (typeof(item))((uint8_t *)(item) + KDBUS_ALIGN8((item)->size))
-+
-+#define KDBUS_ITEM_FOREACH(item, head, first)                      \
-+    for ((item) = (head)->first;                                   \
-+         ((uint8_t *)(item) < (uint8_t *)(head) + (head)->size) && \
-+          ((uint8_t *)(item) >= (uint8_t *)(head));                \
-+         (item) = KDBUS_ITEM_NEXT(item))
-+      ]]></programlisting>
-+    </refsect2>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Item layout</title>
-+    <para>
-+      A <type>struct kdbus_item</type> consists of a
-+      <varname>size</varname> field, describing its overall size, and a
-+      <varname>type</varname> field, both 64 bit wide. They are followed by
-+      a union to store information that is specific to the item's type.
-+      The struct layout is shown below.
-+    </para>
-+
-+    <programlisting>
-+struct kdbus_item {
-+  __u64 size;
-+  __u64 type;
-+  /* item payload - see below */
-+  union {
-+    __u8 data[0];
-+    __u32 data32[0];
-+    __u64 data64[0];
-+    char str[0];
-+
-+    __u64 id;
-+    struct kdbus_vec vec;
-+    struct kdbus_creds creds;
-+    struct kdbus_pids pids;
-+    struct kdbus_audit audit;
-+    struct kdbus_caps caps;
-+    struct kdbus_timestamp timestamp;
-+    struct kdbus_name name;
-+    struct kdbus_bloom_parameter bloom_parameter;
-+    struct kdbus_bloom_filter bloom_filter;
-+    struct kdbus_memfd memfd;
-+    int fds[0];
-+    struct kdbus_notify_name_change name_change;
-+    struct kdbus_notify_id_change id_change;
-+    struct kdbus_policy_access policy_access;
-+  };
-+};
-+    </programlisting>
-+
-+    <para>
-+      <type>struct kdbus_item</type> should never be used to allocate
-+      an item instance, as its size may grow in future releases of the API.
-+      Instead, it should be manually assembled by storing the
-+      <varname>size</varname>, <varname>type</varname> and payload to a
-+      struct of its own.
-+    </para>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Item types</title>
-+
-+    <refsect2>
-+      <title>Negotiation item</title>
-+      <variablelist>
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_NEGOTIATE</constant></term>
-+          <listitem><para>
-+            With this item is attached to any ioctl, programs can
-+            <emphasis>probe</emphasis> the kernel for known item types.
-+            The item carries an array of <type>uint64_t</type> values in
-+            <varname>item.data64</varname>, each set to an item type to
-+            probe. The kernel will reset each member of this array that is
-+            not recognized as valid item type to <constant>0</constant>.
-+            This way, users can negotiate kernel features at start-up to
-+            keep newer userspace compatible with older kernels. This item
-+            is never attached by the kernel in response to any command.
-+          </para></listitem>
-+        </varlistentry>
-+      </variablelist>
-+    </refsect2>
-+
-+    <refsect2>
-+      <title>Command specific items</title>
-+      <variablelist>
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_PAYLOAD_VEC</constant></term>
-+          <term><constant>KDBUS_ITEM_PAYLOAD_OFF</constant></term>
-+          <listitem><para>
-+            Messages are directly copied by the sending process into the
-+            receiver's
-+            <citerefentry>
-+              <refentrytitle>kdbus.pool</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>.
-+            This way, two peers can exchange data by effectively doing a
-+            single-copy from one process to another; the kernel will not buffer
-+            the data anywhere else. <constant>KDBUS_ITEM_PAYLOAD_VEC</constant>
-+            is used when <emphasis>sending</emphasis> message. The item
-+            references a memory address when the payload data can be found.
-+            <constant>KDBUS_ITEM_PAYLOAD_OFF</constant> is used when messages
-+            are <emphasis>received</emphasis>, and the
-+            <constant>offset</constant> value describes the offset inside the
-+            receiving connection's
-+            <citerefentry>
-+              <refentrytitle>kdbus.pool</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>
-+            where the message payload can be found. See
-+            <citerefentry>
-+              <refentrytitle>kdbus.message</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>
-+            for more information on passing of payload data along with a
-+            message.
-+            <programlisting>
-+struct kdbus_vec {
-+  __u64 size;
-+  union {
-+    __u64 address;
-+    __u64 offset;
-+  };
-+};
-+            </programlisting>
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_PAYLOAD_MEMFD</constant></term>
-+          <listitem><para>
-+            Transports a file descriptor of a <emphasis>memfd</emphasis> in
-+            <type>struct kdbus_memfd</type> in <varname>item.memfd</varname>.
-+            The <varname>size</varname> field has to match the actual size of
-+            the memfd that was specified when it was created. The
-+            <varname>start</varname> parameter denotes the offset inside the
-+            memfd at which the referenced payload starts. See
-+            <citerefentry>
-+              <refentrytitle>kdbus.message</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>
-+            for more information on passing of payload data along with a
-+            message.
-+            <programlisting>
-+struct kdbus_memfd {
-+  __u64 start;
-+  __u64 size;
-+  int fd;
-+  __u32 __pad;
-+};
-+            </programlisting>
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_FDS</constant></term>
-+          <listitem><para>
-+            Contains an array of <emphasis>file descriptors</emphasis>.
-+            When used with <constant>KDBUS_CMD_SEND</constant>, the values of
-+            this array must be filled with valid file descriptor numbers.
-+            When received as item attached to a message, the array will
-+            contain the numbers of the installed file descriptors, or
-+            <constant>-1</constant> in case an error occurred.
-+            In either case, the number of entries in the array is derived from
-+            the item's total size. See
-+            <citerefentry>
-+              <refentrytitle>kdbus.message</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>
-+            for more information.
-+          </para></listitem>
-+        </varlistentry>
-+      </variablelist>
-+    </refsect2>
-+
-+    <refsect2>
-+      <title>Items specific to some commands</title>
-+      <variablelist>
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_CANCEL_FD</constant></term>
-+          <listitem><para>
-+            Transports a file descriptor that can be used to cancel a
-+            synchronous <constant>KDBUS_CMD_SEND</constant> operation by
-+            writing to it. The file descriptor is stored in
-+            <varname>item.fd[0]</varname>. The item may only contain one
-+            file descriptor. See
-+            <citerefentry>
-+              <refentrytitle>kdbus.message</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>
-+            for more information on this item and how to use it.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_BLOOM_PARAMETER</constant></term>
-+          <listitem><para>
-+            Contains a set of <emphasis>bloom parameters</emphasis> as
-+            <type>struct kdbus_bloom_parameter</type> in
-+            <varname>item.bloom_parameter</varname>.
-+            The item is passed from userspace to kernel during the
-+            <constant>KDBUS_CMD_BUS_MAKE</constant> ioctl, and returned
-+            verbatim when <constant>KDBUS_CMD_HELLO</constant> is called.
-+            The kernel does not use the bloom parameters, but they need to
-+            be known by each connection on the bus in order to define the
-+            bloom filter hash details. See
-+            <citerefentry>
-+              <refentrytitle>kdbus.match</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>
-+            for more information on matching and bloom filters.
-+            <programlisting>
-+struct kdbus_bloom_parameter {
-+  __u64 size;
-+  __u64 n_hash;
-+};
-+            </programlisting>
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_BLOOM_FILTER</constant></term>
-+          <listitem><para>
-+            Carries a <emphasis>bloom filter</emphasis> as
-+            <type>struct kdbus_bloom_filter</type> in
-+            <varname>item.bloom_filter</varname>. It is mandatory to send this
-+            item attached to a <type>struct kdbus_msg</type>, in case the
-+            message is a signal. This item is never transported from kernel to
-+            userspace. See
-+            <citerefentry>
-+              <refentrytitle>kdbus.match</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>
-+            for more information on matching and bloom filters.
-+            <programlisting>
-+struct kdbus_bloom_filter {
-+  __u64 generation;
-+  __u64 data[0];
-+};
-+            </programlisting>
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_BLOOM_MASK</constant></term>
-+          <listitem><para>
-+            Transports a <emphasis>bloom mask</emphasis> as binary data blob
-+            stored in <varname>item.data</varname>. This item is used to
-+            describe a match into a connection's match database. See
-+            <citerefentry>
-+              <refentrytitle>kdbus.match</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>
-+            for more information on matching and bloom filters.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_DST_NAME</constant></term>
-+          <listitem><para>
-+            Contains a <emphasis>well-known name</emphasis> to send a
-+            message to, as null-terminated string in
-+            <varname>item.str</varname>. This item is used with
-+            <constant>KDBUS_CMD_SEND</constant>. See
-+            <citerefentry>
-+              <refentrytitle>kdbus.message</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>
-+            for more information on how to send a message.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_MAKE_NAME</constant></term>
-+          <listitem><para>
-+            Contains a <emphasis>bus name</emphasis> or
-+            <emphasis>endpoint name</emphasis>, stored as null-terminated
-+            string in <varname>item.str</varname>. This item is sent from
-+            userspace to kernel when buses or endpoints are created, and
-+            returned back to userspace when the bus creator information is
-+            queried. See
-+            <citerefentry>
-+              <refentrytitle>kdbus.bus</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>
-+            and
-+            <citerefentry>
-+              <refentrytitle>kdbus.endpoint</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_ATTACH_FLAGS_SEND</constant></term>
-+          <term><constant>KDBUS_ITEM_ATTACH_FLAGS_RECV</constant></term>
-+          <listitem><para>
-+            Contains a set of <emphasis>attach flags</emphasis> at
-+            <emphasis>send</emphasis> or <emphasis>receive</emphasis> time. See
-+            <citerefentry>
-+              <refentrytitle>kdbus</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>,
-+            <citerefentry>
-+              <refentrytitle>kdbus.bus</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry> and
-+            <citerefentry>
-+              <refentrytitle>kdbus.connection</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>
-+            for more information on attach flags.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_ID</constant></term>
-+          <listitem><para>
-+            Transports a connection's <emphasis>numerical ID</emphasis> of
-+            a connection as <type>uint64_t</type> value in
-+            <varname>item.id</varname>.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_NAME</constant></term>
-+          <listitem><para>
-+            Transports a name associated with the
-+            <emphasis>name registry</emphasis> as null-terminated string as
-+            <type>struct kdbus_name</type> in
-+            <varname>item.name</varname>. The <varname>flags</varname>
-+            contains the flags of the name. See
-+            <citerefentry>
-+              <refentrytitle>kdbus.name</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>
-+            for more information on how to access the name registry of a bus.
-+            <programlisting>
-+struct kdbus_name {
-+  __u64 flags;
-+  char name[0];
-+};
-+            </programlisting>
-+          </para></listitem>
-+        </varlistentry>
-+      </variablelist>
-+    </refsect2>
-+
-+    <refsect2>
-+      <title>Items attached by the kernel as metadata</title>
-+
-+      <variablelist>
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_TIMESTAMP</constant></term>
-+          <listitem><para>
-+            Contains both the <emphasis>monotonic</emphasis> and the
-+            <emphasis>realtime</emphasis> timestamp, taken when the message
-+            was processed on the kernel side.
-+            Stored as <type>struct kdbus_timestamp</type> in
-+            <varname>item.timestamp</varname>.
-+            <programlisting>
-+struct kdbus_timestamp {
-+  __u64 seqnum;
-+  __u64 monotonic_ns;
-+  __u64 realtime_ns;
-+};
-+            </programlisting>
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_CREDS</constant></term>
-+          <listitem><para>
-+            Contains a set of <emphasis>user</emphasis> and
-+            <emphasis>group</emphasis> information as 32-bit values, in the
-+            usual four flavors: real, effective, saved and filesystem related.
-+            Stored as <type>struct kdbus_creds</type> in
-+            <varname>item.creds</varname>.
-+            <programlisting>
-+struct kdbus_creds {
-+  __u32 uid;
-+  __u32 euid;
-+  __u32 suid;
-+  __u32 fsuid;
-+  __u32 gid;
-+  __u32 egid;
-+  __u32 sgid;
-+  __u32 fsgid;
-+};
-+            </programlisting>
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_PIDS</constant></term>
-+          <listitem><para>
-+            Contains the <emphasis>PID</emphasis>, <emphasis>TID</emphasis>
-+            and <emphasis>parent PID (PPID)</emphasis> of a remote peer.
-+            Stored as <type>struct kdbus_pids</type> in
-+            <varname>item.pids</varname>.
-+            <programlisting>
-+struct kdbus_pids {
-+  __u64 pid;
-+  __u64 tid;
-+  __u64 ppid;
-+};
-+            </programlisting>
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_AUXGROUPS</constant></term>
-+          <listitem><para>
-+            Contains the <emphasis>auxiliary (supplementary) groups</emphasis>
-+            a remote peer is a member of, stored as array of
-+            <type>uint32_t</type> values in <varname>item.data32</varname>.
-+            The array length can be determined by looking at the item's total
-+            size, subtracting the size of the header and dividing the
-+            remainder by <constant>sizeof(uint32_t)</constant>.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_OWNED_NAME</constant></term>
-+          <listitem><para>
-+            Contains a <emphasis>well-known name</emphasis> currently owned
-+            by a connection. The name is stored as null-terminated string in
-+            <varname>item.str</varname>. Its length can also be derived from
-+            the item's total size.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_TID_COMM</constant> [*]</term>
-+          <listitem><para>
-+            Contains the <emphasis>comm</emphasis> string of a task's
-+            <emphasis>TID</emphasis> (thread ID), stored as null-terminated
-+            string in <varname>item.str</varname>. Its length can also be
-+            derived from the item's total size. Receivers of this item should
-+            not use its contents for any kind of security measures. See below.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_PID_COMM</constant> [*]</term>
-+          <listitem><para>
-+            Contains the <emphasis>comm</emphasis> string of a task's
-+            <emphasis>PID</emphasis> (process ID), stored as null-terminated
-+            string in <varname>item.str</varname>. Its length can also be
-+            derived from the item's total size. Receivers of this item should
-+            not use its contents for any kind of security measures. See below.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_EXE</constant> [*]</term>
-+          <listitem><para>
-+            Contains the <emphasis>path to the executable</emphasis> of a task,
-+            stored as null-terminated string in <varname>item.str</varname>. Its
-+            length can also be derived from the item's total size. Receivers of
-+            this item should not use its contents for any kind of security
-+            measures. See below.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_CMDLINE</constant> [*]</term>
-+          <listitem><para>
-+            Contains the <emphasis>command line arguments</emphasis> of a
-+            task, stored as an <emphasis>array</emphasis> of null-terminated
-+            strings in <varname>item.str</varname>. The total length of all
-+            strings in the array can be derived from the item's total size.
-+            Receivers of this item should not use its contents for any kind
-+            of security measures. See below.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_CGROUP</constant></term>
-+          <listitem><para>
-+            Contains the <emphasis>cgroup path</emphasis> of a task, stored
-+            as null-terminated string in <varname>item.str</varname>. Its
-+            length can also be derived from the item's total size.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_CAPS</constant></term>
-+          <listitem><para>
-+            Contains sets of <emphasis>capabilities</emphasis>, stored as
-+            <type>struct kdbus_caps</type> in <varname>item.caps</varname>.
-+            As the item size may increase in the future, programs should be
-+            written in a way that it takes
-+            <varname>item.caps.last_cap</varname> into account, and derive
-+            the number of sets and rows from the item size and the reported
-+            number of valid capability bits.
-+            <programlisting>
-+struct kdbus_caps {
-+  __u32 last_cap;
-+  __u32 caps[0];
-+};
-+            </programlisting>
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_SECLABEL</constant></term>
-+          <listitem><para>
-+            Contains the <emphasis>LSM label</emphasis> of a task, stored as
-+            null-terminated string in <varname>item.str</varname>. Its length
-+            can also be derived from the item's total size.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_AUDIT</constant></term>
-+          <listitem><para>
-+            Contains the audit <emphasis>sessionid</emphasis> and
-+            <emphasis>loginuid</emphasis> of a task, stored as
-+            <type>struct kdbus_audit</type> in
-+            <varname>item.audit</varname>.
-+            <programlisting>
-+struct kdbus_audit {
-+  __u32 sessionid;
-+  __u32 loginuid;
-+};
-+            </programlisting>
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_CONN_DESCRIPTION</constant></term>
-+          <listitem><para>
-+            Contains the <emphasis>connection description</emphasis>, as set
-+            by <constant>KDBUS_CMD_HELLO</constant> or
-+            <constant>KDBUS_CMD_CONN_UPDATE</constant>, stored as
-+            null-terminated string in <varname>item.str</varname>. Its length
-+            can also be derived from the item's total size.
-+          </para></listitem>
-+        </varlistentry>
-+      </variablelist>
-+
-+      <para>
-+        All metadata is automatically translated into the
-+        <emphasis>namespaces</emphasis> of the task that receives them. See
-+        <citerefentry>
-+          <refentrytitle>kdbus.message</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+        for more information.
-+      </para>
-+
-+      <para>
-+        [*] Note that the content stored in metadata items of type
-+        <constant>KDBUS_ITEM_TID_COMM</constant>,
-+        <constant>KDBUS_ITEM_PID_COMM</constant>,
-+        <constant>KDBUS_ITEM_EXE</constant> and
-+        <constant>KDBUS_ITEM_CMDLINE</constant>
-+        can easily be tampered by the sending tasks. Therefore, they should
-+        <emphasis>not</emphasis> be used for any sort of security relevant
-+        assumptions. The only reason they are transmitted is to let
-+        receivers know about details that were set when metadata was
-+        collected, even though the task they were collected from is not
-+        active any longer when the items are received.
-+      </para>
-+    </refsect2>
-+
-+    <refsect2>
-+      <title>Items used for policy entries, matches and notifications</title>
-+
-+      <variablelist>
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_POLICY_ACCESS</constant></term>
-+          <listitem><para>
-+            This item describes a <emphasis>policy access</emphasis> entry to
-+            access the policy database of a
-+            <citerefentry>
-+              <refentrytitle>kdbus.bus</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry> or
-+            <citerefentry>
-+              <refentrytitle>kdbus.endpoint</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>.
-+            Please refer to
-+            <citerefentry>
-+              <refentrytitle>kdbus.policy</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>
-+            for more information on the policy database and how to access it.
-+            <programlisting>
-+struct kdbus_policy_access {
-+  __u64 type;
-+  __u64 access;
-+  __u64 id;
-+};
-+            </programlisting>
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_ID_ADD</constant></term>
-+          <term><constant>KDBUS_ITEM_ID_REMOVE</constant></term>
-+          <listitem><para>
-+            This item is sent as attachment to a
-+            <emphasis>kernel notification</emphasis> and indicates that a
-+            new connection was created on the bus, or that a connection was
-+            disconnected, respectively. It stores a
-+            <type>struct kdbus_notify_id_change</type> in
-+            <varname>item.id_change</varname>.
-+            The <varname>id</varname> field contains the numeric ID of the
-+            connection that was added or removed, and <varname>flags</varname>
-+            is set to the connection flags, as passed by
-+            <constant>KDBUS_CMD_HELLO</constant>. See
-+            <citerefentry>
-+              <refentrytitle>kdbus.match</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>
-+            and
-+            <citerefentry>
-+              <refentrytitle>kdbus.message</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>
-+            for more information on matches and notification messages.
-+            <programlisting>
-+struct kdbus_notify_id_change {
-+  __u64 id;
-+  __u64 flags;
-+};
-+            </programlisting>
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_NAME_ADD</constant></term>
-+          <term><constant>KDBUS_ITEM_NAME_REMOVE</constant></term>
-+          <term><constant>KDBUS_ITEM_NAME_CHANGE</constant></term>
-+          <listitem><para>
-+            This item is sent as attachment to a
-+            <emphasis>kernel notification</emphasis> and indicates that a
-+            <emphasis>well-known name</emphasis> appeared, disappeared or
-+            transferred to another owner on the bus. It stores a
-+            <type>struct kdbus_notify_name_change</type> in
-+            <varname>item.name_change</varname>.
-+            <varname>old_id</varname> describes the former owner of the name
-+            and is set to <constant>0</constant> values in case of
-+            <constant>KDBUS_ITEM_NAME_ADD</constant>.
-+            <varname>new_id</varname> describes the new owner of the name and
-+            is set to <constant>0</constant> values in case of
-+            <constant>KDBUS_ITEM_NAME_REMOVE</constant>.
-+            The <varname>name</varname> field contains the well-known name the
-+            notification is about, as null-terminated string. See
-+            <citerefentry>
-+              <refentrytitle>kdbus.match</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>
-+            and
-+            <citerefentry>
-+              <refentrytitle>kdbus.message</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>
-+            for more information on matches and notification messages.
-+            <programlisting>
-+struct kdbus_notify_name_change {
-+  struct kdbus_notify_id_change old_id;
-+  struct kdbus_notify_id_change new_id;
-+  char name[0];
-+};
-+            </programlisting>
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_REPLY_TIMEOUT</constant></term>
-+          <listitem><para>
-+            This item is sent as attachment to a
-+            <emphasis>kernel notification</emphasis>. It informs the receiver
-+            that an expected reply to a message was not received in time.
-+            The remote peer ID and the message cookie are stored in the message
-+            header. See
-+            <citerefentry>
-+              <refentrytitle>kdbus.message</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>
-+            for more information about messages, timeouts and notifications.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ITEM_REPLY_DEAD</constant></term>
-+          <listitem><para>
-+            This item is sent as attachment to a
-+            <emphasis>kernel notification</emphasis>. It informs the receiver
-+            that a remote connection a reply is expected from was disconnected
-+            before that reply was sent. The remote peer ID and the message
-+            cookie are stored in the message header. See
-+            <citerefentry>
-+              <refentrytitle>kdbus.message</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>
-+            for more information about messages, timeouts and notifications.
-+          </para></listitem>
-+        </varlistentry>
-+      </variablelist>
-+    </refsect2>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>See Also</title>
-+    <simplelist type="inline">
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.bus</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.connection</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.endpoint</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.fs</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.message</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.name</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.pool</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>memfd_create</refentrytitle>
-+          <manvolnum>2</manvolnum>
-+        </citerefentry>
-+      </member>
-+    </simplelist>
-+  </refsect1>
-+
-+</refentry>
-diff --git a/Documentation/kdbus/kdbus.match.xml b/Documentation/kdbus/kdbus.match.xml
-new file mode 100644
-index 0000000..ae38e04
---- /dev/null
-+++ b/Documentation/kdbus/kdbus.match.xml
-@@ -0,0 +1,555 @@
-+<?xml version='1.0'?> <!--*-nxml-*-->
-+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
-+        "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
-+
-+<refentry id="kdbus.match">
-+
-+  <refentryinfo>
-+    <title>kdbus.match</title>
-+    <productname>kdbus.match</productname>
-+  </refentryinfo>
-+
-+  <refmeta>
-+    <refentrytitle>kdbus.match</refentrytitle>
-+    <manvolnum>7</manvolnum>
-+  </refmeta>
-+
-+  <refnamediv>
-+    <refname>kdbus.match</refname>
-+    <refpurpose>kdbus match</refpurpose>
-+  </refnamediv>
-+
-+  <refsect1>
-+    <title>Description</title>
-+
-+    <para>
-+      kdbus connections can install matches in order to subscribe to signal
-+      messages sent on the bus. Such signal messages can be either directed
-+      to a single connection (by setting a specific connection ID in
-+      <varname>struct kdbus_msg.dst_id</varname> or by sending it to a
-+      well-known name), or to potentially <emphasis>all</emphasis> currently
-+      active connections on the bus (by setting
-+      <varname>struct kdbus_msg.dst_id</varname> to
-+      <constant>KDBUS_DST_ID_BROADCAST</constant>).
-+      A signal message always has the <constant>KDBUS_MSG_SIGNAL</constant>
-+      bit set in the <varname>flags</varname> bitfield.
-+      Also, signal messages can originate from either the kernel (called
-+      <emphasis>notifications</emphasis>), or from other bus connections.
-+      In either case, a bus connection needs to have a suitable
-+      <emphasis>match</emphasis> installed in order to receive any signal
-+      message. Without any rules installed in the connection, no signal message
-+      will be received.
-+    </para>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Matches for signal messages from other connections</title>
-+    <para>
-+      Matches for messages from other connections (not kernel notifications)
-+      are implemented as bloom filters (see below). The sender adds certain
-+      properties of the message as elements to a bloom filter bit field, and
-+      sends that along with the signal message.
-+
-+      The receiving connection adds the message properties it is interested in
-+      as elements to a bloom mask bit field, and uploads the mask as match rule,
-+      possibly along with some other rules to further limit the match.
-+
-+      The kernel will match the signal message's bloom filter against the
-+      connection's bloom mask (simply by &amp;-ing it), and will decide whether
-+      the message should be delivered to a connection.
-+    </para>
-+    <para>
-+      The kernel has no notion of any specific properties of the signal message,
-+      all it sees are the bit fields of the bloom filter and the mask to match
-+      against. The use of bloom filters allows simple and efficient matching,
-+      without exposing any message properties or internals to the kernel side.
-+      Clients need to deal with the fact that they might receive signal messages
-+      which they did not subscribe to, as the bloom filter might allow
-+      false-positives to pass the filter.
-+
-+      To allow the future extension of the set of elements in the bloom filter,
-+      the filter specifies a <emphasis>generation</emphasis> number. A later
-+      generation must always contain all elements of the set of the previous
-+      generation, but can add new elements to the set. The match rules mask can
-+      carry an array with all previous generations of masks individually stored.
-+      When the filter and mask are matched by the kernel, the mask with the
-+      closest matching generation is selected as the index into the mask array.
-+    </para>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Bloom filters</title>
-+    <para>
-+      Bloom filters allow checking whether a given word is present in a
-+      dictionary.  This allows connections to set up a mask for information it
-+      is interested in, and will be delivered signal messages that have a
-+      matching filter.
-+
-+      For general information, see
-+      <ulink url="https://en.wikipedia.org/wiki/Bloom_filter">the Wikipedia
-+      article on bloom filters</ulink>.
-+    </para>
-+    <para>
-+      The size of the bloom filter is defined per bus when it is created, in
-+      <varname>kdbus_bloom_parameter.size</varname>. All bloom filters attached
-+      to signal messages on the bus must match this size, and all bloom filter
-+      matches uploaded by connections must also match the size, or a multiple
-+      thereof (see below).
-+
-+      The calculation of the mask has to be done in userspace applications. The
-+      kernel just checks the bitmasks to decide whether or not to let the
-+      message pass. All bits in the mask must match the filter in and bit-wise
-+      <emphasis>AND</emphasis> logic, but the mask may have more bits set than
-+      the filter. Consequently, false positive matches are expected to happen,
-+      and programs must deal with that fact by checking the contents of the
-+      payload again at receive time.
-+    </para>
-+    <para>
-+      Masks are entities that are always passed to the kernel as part of a
-+      match (with an item of type <constant>KDBUS_ITEM_BLOOM_MASK</constant>),
-+      and filters can be attached to signals, with an item of type
-+      <constant>KDBUS_ITEM_BLOOM_FILTER</constant>. For a filter to match, all
-+      its bits have to be set in the match mask as well.
-+    </para>
-+    <para>
-+      For example, consider a bus that has a bloom size of 8 bytes, and the
-+      following mask/filter combinations:
-+    </para>
-+    <programlisting><![CDATA[
-+          filter  0x0101010101010101
-+          mask    0x0101010101010101
-+                  -> matches
-+
-+          filter  0x0303030303030303
-+          mask    0x0101010101010101
-+                  -> doesn't match
-+
-+          filter  0x0101010101010101
-+          mask    0x0303030303030303
-+                  -> matches
-+    ]]></programlisting>
-+
-+    <para>
-+      Hence, in order to catch all messages, a mask filled with
-+      <constant>0xff</constant> bytes can be installed as a wildcard match rule.
-+    </para>
-+
-+    <refsect2>
-+      <title>Generations</title>
-+
-+      <para>
-+        Uploaded matches may contain multiple masks, which have to be as large
-+        as the bloom filter size defined by the bus. Each block of a mask is
-+        called a <emphasis>generation</emphasis>, starting at index 0.
-+
-+        At match time, when a signal is about to be delivered, a bloom mask
-+        generation is passed, which denotes which of the bloom masks the filter
-+        should be matched against. This allows programs to provide backward
-+        compatible masks at upload time, while older clients can still match
-+        against older versions of filters.
-+      </para>
-+    </refsect2>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Matches for kernel notifications</title>
-+    <para>
-+      To receive kernel generated notifications (see
-+      <citerefentry>
-+        <refentrytitle>kdbus.message</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>),
-+      a connection must install match rules that are different from
-+      the bloom filter matches described in the section above. They can be
-+      filtered by the connection ID that caused the notification to be sent, by
-+      one of the names it currently owns, or by the type of the notification
-+      (ID/name add/remove/change).
-+    </para>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Adding a match</title>
-+    <para>
-+      To add a match, the <constant>KDBUS_CMD_MATCH_ADD</constant> ioctl is
-+      used, which takes a <type>struct kdbus_cmd_match</type> as an argument
-+      described below.
-+
-+      Note that each of the items attached to this command will internally
-+      create one match <emphasis>rule</emphasis>, and the collection of them,
-+      which is submitted as one block via the ioctl, is called a
-+      <emphasis>match</emphasis>. To allow a message to pass, all rules of a
-+      match have to be satisfied. Hence, adding more items to the command will
-+      only narrow the possibility of a match to effectively let the message
-+      pass, and will decrease the chance that the connection's process will be
-+      woken up needlessly.
-+
-+      Multiple matches can be installed per connection. As long as one of it has
-+      a set of rules which allows the message to pass, this one will be
-+      decisive.
-+    </para>
-+
-+    <programlisting>
-+struct kdbus_cmd_match {
-+  __u64 size;
-+  __u64 flags;
-+  __u64 return_flags;
-+  __u64 cookie;
-+  struct kdbus_item items[0];
-+};
-+    </programlisting>
-+
-+    <para>The fields in this struct are described below.</para>
-+
-+    <variablelist>
-+      <varlistentry>
-+        <term><varname>size</varname></term>
-+        <listitem><para>
-+          The overall size of the struct, including its items.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>flags</varname></term>
-+        <listitem><para>Flags to control the behavior of the ioctl.</para>
-+          <variablelist>
-+            <varlistentry>
-+              <term><constant>KDBUS_MATCH_REPLACE</constant></term>
-+              <listitem>
-+                <para>Make the endpoint file group-accessible</para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_FLAG_NEGOTIATE</constant></term>
-+              <listitem>
-+                <para>
-+                  Requests a set of valid flags for this ioctl. When this bit is
-+                  set, no action is taken; the ioctl will return
-+                  <errorcode>0</errorcode>, and the <varname>flags</varname>
-+                  field will have all bits set that are valid for this command.
-+                  The <constant>KDBUS_FLAG_NEGOTIATE</constant> bit will be
-+                  cleared by the operation.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+          </variablelist>
-+        </listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>return_flags</varname></term>
-+        <listitem><para>
-+          Flags returned by the kernel. Currently unused and always set to
-+          <constant>0</constant> by the kernel.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>cookie</varname></term>
-+        <listitem><para>
-+          A cookie which identifies the match, so it can be referred to when
-+          removing it.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>items</varname></term>
-+        <listitem>
-+        <para>
-+          Items to define the actual rules of the matches. The following item
-+          types are expected. Each item will create one new match rule.
-+        </para>
-+          <variablelist>
-+            <varlistentry>
-+              <term><constant>KDBUS_ITEM_BLOOM_MASK</constant></term>
-+              <listitem>
-+                <para>
-+                  An item that carries the bloom filter mask to match against
-+                  in its data field. The payload size must match the bloom
-+                  filter size that was specified when the bus was created.
-+                  See the "Bloom filters" section above for more information on
-+                  bloom filters.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_ITEM_NAME</constant></term>
-+              <listitem>
-+                <para>
-+                  When used as part of kernel notifications, this item specifies
-+                  a name that is acquired, lost or that changed its owner (see
-+                  below). When used as part of a match for user-generated signal
-+                  messages, it specifies a name that the sending connection must
-+                  own at the time of sending the signal.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_ITEM_ID</constant></term>
-+              <listitem>
-+                <para>
-+                  Specify a sender connection's ID that will match this rule.
-+                  For kernel notifications, this specifies the ID of a
-+                  connection that was added to or removed from the bus.
-+                  For used-generated signals, it specifies the ID of the
-+                  connection that sent the signal message.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_ITEM_NAME_ADD</constant></term>
-+              <term><constant>KDBUS_ITEM_NAME_REMOVE</constant></term>
-+              <term><constant>KDBUS_ITEM_NAME_CHANGE</constant></term>
-+              <listitem>
-+                <para>
-+                  These items request delivery of kernel notifications that
-+                  describe a name acquisition, loss, or change. The details
-+                  are stored in the item's
-+                  <varname>kdbus_notify_name_change</varname> member.
-+                  All information specified must be matched in order to make
-+                  the message pass. Use
-+                  <constant>KDBUS_MATCH_ID_ANY</constant> to
-+                  match against any unique connection ID.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_ITEM_ID_ADD</constant></term>
-+              <term><constant>KDBUS_ITEM_ID_REMOVE</constant></term>
-+              <listitem>
-+                <para>
-+                  These items request delivery of kernel notifications that are
-+                  generated when a connection is created or terminated.
-+                  <type>struct kdbus_notify_id_change</type> is used to
-+                  store the actual match information. This item can be used to
-+                  monitor one particular connection ID, or, when the ID field
-+                  is set to <constant>KDBUS_MATCH_ID_ANY</constant>,
-+                  all of them.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_ITEM_NEGOTIATE</constant></term>
-+              <listitem><para>
-+                With this item, programs can <emphasis>probe</emphasis> the
-+                kernel for known item types. See
-+                <citerefentry>
-+                  <refentrytitle>kdbus.item</refentrytitle>
-+                  <manvolnum>7</manvolnum>
-+                </citerefentry>
-+                for more details.
-+              </para></listitem>
-+            </varlistentry>
-+          </variablelist>
-+
-+          <para>
-+            Unrecognized items are rejected, and the ioctl will fail with
-+            <varname>errno</varname> set to <constant>EINVAL</constant>.
-+          </para>
-+        </listitem>
-+      </varlistentry>
-+    </variablelist>
-+
-+    <para>
-+      Refer to
-+      <citerefentry>
-+        <refentrytitle>kdbus.message</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>
-+      for more information on message types.
-+    </para>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Removing a match</title>
-+    <para>
-+      Matches can be removed with the
-+      <constant>KDBUS_CMD_MATCH_REMOVE</constant> ioctl, which takes
-+      <type>struct kdbus_cmd_match</type> as argument, but its fields
-+      usage slightly differs compared to that of
-+      <constant>KDBUS_CMD_MATCH_ADD</constant>.
-+    </para>
-+
-+    <programlisting>
-+struct kdbus_cmd_match {
-+  __u64 size;
-+  __u64 cookie;
-+  __u64 flags;
-+  __u64 return_flags;
-+  struct kdbus_item items[0];
-+};
-+    </programlisting>
-+
-+    <para>The fields in this struct are described below.</para>
-+
-+    <variablelist>
-+      <varlistentry>
-+        <term><varname>size</varname></term>
-+        <listitem><para>
-+          The overall size of the struct, including its items.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>cookie</varname></term>
-+        <listitem><para>
-+          The cookie of the match, as it was passed when the match was added.
-+          All matches that have this cookie will be removed.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>flags</varname></term>
-+        <listitem><para>
-+          No flags are supported for this use case.
-+          <constant>KDBUS_FLAG_NEGOTIATE</constant> is accepted to probe for
-+          valid flags. If set, the ioctl will fail with
-+          <errorcode>-1</errorcode>, <varname>errno</varname> is set to
-+          <constant>EPROTO</constant>, and the <varname>flags</varname> field
-+          is set to <constant>0</constant>.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>return_flags</varname></term>
-+        <listitem><para>
-+          Flags returned by the kernel. Currently unused and always set to
-+          <constant>0</constant> by the kernel.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>items</varname></term>
-+        <listitem>
-+          <para>
-+            No items are supported for this use case, but
-+            <constant>KDBUS_ITEM_NEGOTIATE</constant> is allowed nevertheless.
-+          </para>
-+        </listitem>
-+      </varlistentry>
-+    </variablelist>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Return value</title>
-+    <para>
-+      On success, all mentioned ioctl commands return <errorcode>0</errorcode>;
-+      on error, <errorcode>-1</errorcode> is returned, and
-+      <varname>errno</varname> is set to indicate the error.
-+      If the issued ioctl is illegal for the file descriptor used,
-+      <varname>errno</varname> will be set to <constant>ENOTTY</constant>.
-+    </para>
-+
-+    <refsect2>
-+      <title>
-+        <constant>KDBUS_CMD_MATCH_ADD</constant> may fail with the following
-+        errors
-+      </title>
-+
-+      <variablelist>
-+        <varlistentry>
-+          <term><constant>EINVAL</constant></term>
-+          <listitem><para>
-+            Illegal flags or items.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EDOM</constant></term>
-+          <listitem><para>
-+            Illegal bloom filter size.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EMFILE</constant></term>
-+          <listitem><para>
-+            Too many matches for this connection.
-+          </para></listitem>
-+        </varlistentry>
-+      </variablelist>
-+    </refsect2>
-+
-+    <refsect2>
-+      <title>
-+        <constant>KDBUS_CMD_MATCH_REMOVE</constant> may fail with the following
-+        errors
-+      </title>
-+
-+      <variablelist>
-+        <varlistentry>
-+          <term><constant>EINVAL</constant></term>
-+          <listitem><para>
-+            Illegal flags.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EBADSLT</constant></term>
-+          <listitem><para>
-+            A match entry with the given cookie could not be found.
-+          </para></listitem>
-+        </varlistentry>
-+      </variablelist>
-+    </refsect2>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>See Also</title>
-+    <simplelist type="inline">
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.bus</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.match</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.fs</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.item</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.message</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.name</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.pool</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+    </simplelist>
-+  </refsect1>
-+</refentry>
-diff --git a/Documentation/kdbus/kdbus.message.xml b/Documentation/kdbus/kdbus.message.xml
-new file mode 100644
-index 0000000..0115d9d
---- /dev/null
-+++ b/Documentation/kdbus/kdbus.message.xml
-@@ -0,0 +1,1276 @@
-+<?xml version='1.0'?> <!--*-nxml-*-->
-+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
-+        "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
-+
-+<refentry id="kdbus.message">
-+
-+  <refentryinfo>
-+    <title>kdbus.message</title>
-+    <productname>kdbus.message</productname>
-+  </refentryinfo>
-+
-+  <refmeta>
-+    <refentrytitle>kdbus.message</refentrytitle>
-+    <manvolnum>7</manvolnum>
-+  </refmeta>
-+
-+  <refnamediv>
-+    <refname>kdbus.message</refname>
-+    <refpurpose>kdbus message</refpurpose>
-+  </refnamediv>
-+
-+  <refsect1>
-+    <title>Description</title>
-+
-+    <para>
-+      A kdbus message is used to exchange information between two connections
-+      on a bus, or to transport notifications from the kernel to one or many
-+      connections. This document describes the layout of messages, how payload
-+      is added to them and how they are sent and received.
-+    </para>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Message layout</title>
-+
-+    <para>The layout of a message is shown below.</para>
-+
-+    <programlisting>
-+  +-------------------------------------------------------------------------+
-+  | Message                                                                 |
-+  | +---------------------------------------------------------------------+ |
-+  | | Header                                                              | |
-+  | | size:          overall message size, including the data records     | |
-+  | | destination:   connection ID of the receiver                        | |
-+  | | source:        connection ID of the sender (set by kernel)          | |
-+  | | payload_type:  "DBusDBus" textual identifier stored as uint64_t     | |
-+  | +---------------------------------------------------------------------+ |
-+  | +---------------------------------------------------------------------+ |
-+  | | Data Record                                                         | |
-+  | | size:  overall record size (without padding)                        | |
-+  | | type:  type of data                                                 | |
-+  | | data:  reference to data (address or file descriptor)               | |
-+  | +---------------------------------------------------------------------+ |
-+  | +---------------------------------------------------------------------+ |
-+  | | padding bytes to the next 8 byte alignment                          | |
-+  | +---------------------------------------------------------------------+ |
-+  | +---------------------------------------------------------------------+ |
-+  | | Data Record                                                         | |
-+  | | size:  overall record size (without padding)                        | |
-+  | | ...                                                                 | |
-+  | +---------------------------------------------------------------------+ |
-+  | +---------------------------------------------------------------------+ |
-+  | | padding bytes to the next 8 byte alignment                          | |
-+  | +---------------------------------------------------------------------+ |
-+  | +---------------------------------------------------------------------+ |
-+  | | Data Record                                                         | |
-+  | | size:  overall record size                                          | |
-+  | | ...                                                                 | |
-+  | +---------------------------------------------------------------------+ |
-+  |   ... further data records ...                                          |
-+  +-------------------------------------------------------------------------+
-+    </programlisting>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Message payload</title>
-+
-+    <para>
-+      When connecting to the bus, receivers request a memory pool of a given
-+      size, large enough to carry all backlog of data enqueued for the
-+      connection. The pool is internally backed by a shared memory file which
-+      can be <function>mmap()</function>ed by the receiver. See
-+      <citerefentry>
-+        <refentrytitle>kdbus.pool</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>
-+      for more information.
-+    </para>
-+
-+    <para>
-+      Message payload must be described in items attached to a message when
-+      it is sent. A receiver can access the payload by looking at the items
-+      that are attached to a message in its pool. The following items are used.
-+    </para>
-+
-+    <variablelist>
-+      <varlistentry>
-+        <term><constant>KDBUS_ITEM_PAYLOAD_VEC</constant></term>
-+        <listitem>
-+          <para>
-+            This item references a piece of memory on the sender side which is
-+            directly copied into the receiver's pool. This way, two peers can
-+            exchange data by effectively doing a single-copy from one process
-+            to another; the kernel will not buffer the data anywhere else.
-+            This item is never found in a message received by a connection.
-+          </para>
-+        </listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><constant>KDBUS_ITEM_PAYLOAD_OFF</constant></term>
-+        <listitem>
-+          <para>
-+            This item is attached to messages on the receiving side and points
-+            to a memory area inside the receiver's pool. The
-+            <varname>offset</varname> variable in the item denotes the memory
-+            location relative to the message itself.
-+          </para>
-+        </listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><constant>KDBUS_ITEM_PAYLOAD_MEMFD</constant></term>
-+        <listitem>
-+          <para>
-+            Messages can reference <emphasis>memfd</emphasis> files which
-+            contain the data. memfd files are tmpfs-backed files that allow
-+            sealing of the content of the file, which prevents all writable
-+            access to the file content.
-+          </para>
-+          <para>
-+            Only memfds that have
-+            <constant>(F_SEAL_SHRINK|F_SEAL_GROW|F_SEAL_WRITE|F_SEAL_SEAL)
-+            </constant>
-+            set are accepted as payload data, which enforces reliable passing of
-+            data. The receiver can assume that neither the sender nor anyone
-+            else can alter the content after the message is sent. If those
-+            seals are not set on the memfd, the ioctl will fail with
-+            <errorcode>-1</errorcode>, and <varname>errno</varname> will be
-+            set to <constant>ETXTBUSY</constant>.
-+          </para>
-+        </listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><constant>KDBUS_ITEM_FDS</constant></term>
-+        <listitem>
-+          <para>
-+            Messages can transport regular file descriptors via
-+            <constant>KDBUS_ITEM_FDS</constant>. This item carries an array
-+            of <type>int</type> values in <varname>item.fd</varname>. The
-+            maximum number of file descriptors in the item is
-+            <constant>253</constant>, and only one item of this type is
-+            accepted per message. All passed values must be valid file
-+            descriptors; the open count of each file descriptors is increased
-+            by installing it to the receiver's task. This item can only be
-+            used for directed messages, not for broadcasts, and only to
-+            remote peers that have opted-in for receiving file descriptors
-+            at connection time (<constant>KDBUS_HELLO_ACCEPT_FD</constant>).
-+          </para>
-+        </listitem>
-+      </varlistentry>
-+    </variablelist>
-+
-+    <para>
-+      The sender must not make any assumptions on the type in which data is
-+      received by the remote peer. The kernel is free to re-pack multiple
-+      <constant>KDBUS_ITEM_PAYLOAD_VEC</constant> and
-+      <constant>KDBUS_ITEM_PAYLOAD_MEMFD</constant> payloads. For instance, the
-+      kernel may decide to merge multiple <constant>VECs</constant> into a
-+      single <constant>VEC</constant>, inline <constant>MEMFD</constant>
-+      payloads into memory, or merge all passed <constant>VECs</constant> into a
-+      single <constant>MEMFD</constant>. However, the kernel preserves the order
-+      of passed data. This means that the order of all <constant>VEC</constant>
-+      and <constant>MEMFD</constant> items is not changed in respect to each
-+      other. In other words: All passed <constant>VEC</constant> and
-+      <constant>MEMFD</constant> data payloads are treated as a single stream
-+      of data that may be received by the remote peer in a different set of
-+      chunks than it was sent as.
-+    </para>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Sending messages</title>
-+
-+    <para>
-+      Messages are passed to the kernel with the
-+      <constant>KDBUS_CMD_SEND</constant> ioctl. Depending on the destination
-+      address of the message, the kernel delivers the message to the specific
-+      destination connection, or to some subset of all connections on the same
-+      bus. Sending messages across buses is not possible. Messages are always
-+      queued in the memory pool of the destination connection (see above).
-+    </para>
-+
-+    <para>
-+      The <constant>KDBUS_CMD_SEND</constant> ioctl uses a
-+      <type>struct kdbus_cmd_send</type> to describe the message
-+      transfer.
-+    </para>
-+    <programlisting>
-+struct kdbus_cmd_send {
-+  __u64 size;
-+  __u64 flags;
-+  __u64 return_flags;
-+  __u64 msg_address;
-+  struct kdbus_msg_info reply;
-+  struct kdbus_item items[0];
-+};
-+    </programlisting>
-+
-+    <para>The fields in this struct are described below.</para>
-+
-+    <variablelist>
-+      <varlistentry>
-+        <term><varname>size</varname></term>
-+        <listitem><para>
-+          The overall size of the struct, including its items.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>flags</varname></term>
-+        <listitem><para>Flags for message delivery</para>
-+          <variablelist>
-+            <varlistentry>
-+              <term><constant>KDBUS_SEND_SYNC_REPLY</constant></term>
-+              <listitem>
-+                <para>
-+                  By default, all calls to kdbus are considered asynchronous,
-+                  non-blocking. However, as there are many use cases that need
-+                  to wait for a remote peer to answer a method call, there's a
-+                  way to send a message and wait for a reply in a synchronous
-+                  fashion. This is what the
-+                  <constant>KDBUS_SEND_SYNC_REPLY</constant> controls. The
-+                  <constant>KDBUS_CMD_SEND</constant> ioctl will block until the
-+                  reply has arrived, the timeout limit is reached, in case the
-+                  remote connection was shut down, or if interrupted by a signal
-+                  before any reply; see
-+                  <citerefentry>
-+                    <refentrytitle>signal</refentrytitle>
-+                    <manvolnum>7</manvolnum>
-+                  </citerefentry>.
-+
-+                  The offset of the reply message in the sender's pool is stored
-+                  in <varname>reply</varname> when the ioctl has returned without
-+                  error. Hence, there is no need for another
-+                  <constant>KDBUS_CMD_RECV</constant> ioctl or anything else to
-+                  receive the reply.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_FLAG_NEGOTIATE</constant></term>
-+              <listitem>
-+                <para>
-+                  Request a set of valid flags for this ioctl. When this bit is
-+                  set, no action is taken; the ioctl will fail with
-+                  <errorcode>-1</errorcode>, <varname>errno</varname>
-+                  is set to <constant>EPROTO</constant>.
-+                  Once the ioctl returned, the <varname>flags</varname>
-+                  field will have all bits set that the kernel recognizes as
-+                  valid for this command.
-+                  The <constant>KDBUS_FLAG_NEGOTIATE</constant> bit will be
-+                  cleared by the operation.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+          </variablelist>
-+        </listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>return_flags</varname></term>
-+        <listitem><para>
-+          Flags returned by the kernel. Currently unused and always set to
-+          <constant>0</constant> by the kernel.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>msg_address</varname></term>
-+        <listitem><para>
-+          In this field, users have to provide a pointer to a message
-+          (<type>struct kdbus_msg</type>) to send. See below for a
-+          detailed description.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>reply</varname></term>
-+        <listitem><para>
-+          Only used for synchronous replies. See description of
-+          <type>struct kdbus_cmd_recv</type> for more details.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>items</varname></term>
-+        <listitem>
-+          <para>
-+            The following items are currently recognized.
-+          </para>
-+          <variablelist>
-+            <varlistentry>
-+              <term><constant>KDBUS_ITEM_CANCEL_FD</constant></term>
-+              <listitem>
-+                <para>
-+                  When this optional item is passed in, and the call is
-+                  executed as SYNC call, the passed in file descriptor can be
-+                  used as alternative cancellation point. The kernel will call
-+                  <citerefentry>
-+                    <refentrytitle>poll</refentrytitle>
-+                    <manvolnum>2</manvolnum>
-+                  </citerefentry>
-+                  on this file descriptor, and once it reports any incoming
-+                  bytes, the blocking send operation will be canceled; the
-+                  blocking, synchronous ioctl call will return
-+                  <errorcode>-1</errorcode>, and <varname>errno</varname> will
-+                  be set to <errorname>ECANCELED</errorname>.
-+                  Any type of file descriptor on which
-+                  <citerefentry>
-+                    <refentrytitle>poll</refentrytitle>
-+                    <manvolnum>2</manvolnum>
-+                  </citerefentry>
-+                  can be called on can be used as payload to this item; for
-+                  example, an eventfd can be used for this purpose, see
-+                  <citerefentry>
-+                    <refentrytitle>eventfd</refentrytitle>
-+                    <manvolnum>2</manvolnum>
-+                  </citerefentry>.
-+                  For asynchronous message sending, this item is allowed but
-+                  ignored.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+          </variablelist>
-+          <para>
-+            Unrecognized items are rejected, and the ioctl will fail with
-+            <varname>errno</varname> set to <constant>EINVAL</constant>.
-+          </para>
-+        </listitem>
-+      </varlistentry>
-+    </variablelist>
-+
-+    <para>
-+      The message referenced by the <varname>msg_address</varname> above has
-+      the following layout.
-+    </para>
-+
-+    <programlisting>
-+struct kdbus_msg {
-+  __u64 size;
-+  __u64 flags;
-+  __s64 priority;
-+  __u64 dst_id;
-+  __u64 src_id;
-+  __u64 payload_type;
-+  __u64 cookie;
-+  __u64 timeout_ns;
-+  __u64 cookie_reply;
-+  struct kdbus_item items[0];
-+};
-+    </programlisting>
-+
-+    <para>The fields in this struct are described below.</para>
-+
-+    <variablelist>
-+      <varlistentry>
-+        <term><varname>size</varname></term>
-+        <listitem><para>
-+          The overall size of the struct, including its items.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>flags</varname></term>
-+        <listitem><para>Flags to describe message details.</para>
-+          <variablelist>
-+            <varlistentry>
-+              <term><constant>KDBUS_MSG_EXPECT_REPLY</constant></term>
-+              <listitem>
-+                <para>
-+                  Expect a reply to this message from the remote peer. With
-+                  this bit set, the timeout_ns field must be set to a non-zero
-+                  number of nanoseconds in which the receiving peer is expected
-+                  to reply. If such a reply is not received in time, the sender
-+                  will be notified with a timeout message (see below). The
-+                  value must be an absolute value, in nanoseconds and based on
-+                  <constant>CLOCK_MONOTONIC</constant>.
-+                </para><para>
-+                  For a message to be accepted as reply, it must be a direct
-+                  message to the original sender (not a broadcast and not a
-+                  signal message), and its
-+                  <varname>kdbus_msg.cookie_reply</varname> must match the
-+                  previous message's <varname>kdbus_msg.cookie</varname>.
-+                </para><para>
-+                  Expected replies also temporarily open the policy of the
-+                  sending connection, so the other peer is allowed to respond
-+                  within the given time window.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_MSG_NO_AUTO_START</constant></term>
-+              <listitem>
-+                <para>
-+                  By default, when a message is sent to an activator
-+                  connection, the activator is notified and will start an
-+                  implementer. This flag inhibits that behavior. With this bit
-+                  set, and the remote being an activator, the ioctl will fail
-+                  with <varname>errno</varname> set to
-+                  <constant>EADDRNOTAVAIL</constant>.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_FLAG_NEGOTIATE</constant></term>
-+              <listitem>
-+                <para>
-+                  Requests a set of valid flags for this ioctl. When this bit is
-+                  set, no action is taken; the ioctl will return
-+                  <errorcode>0</errorcode>, and the <varname>flags</varname>
-+                  field will have all bits set that are valid for this command.
-+                  The <constant>KDBUS_FLAG_NEGOTIATE</constant> bit will be
-+                  cleared by the operation.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+          </variablelist>
-+        </listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>priority</varname></term>
-+        <listitem><para>
-+          The priority of this message. Receiving messages (see below) may
-+          optionally be constrained to messages of a minimal priority. This
-+          allows for use cases where timing critical data is interleaved with
-+          control data on the same connection. If unused, the priority field
-+          should be set to <constant>0</constant>.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>dst_id</varname></term>
-+        <listitem><para>
-+          The numeric ID of the destination connection, or
-+          <constant>KDBUS_DST_ID_BROADCAST</constant>
-+          (~0ULL) to address every peer on the bus, or
-+          <constant>KDBUS_DST_ID_NAME</constant> (0) to look
-+          it up dynamically from the bus' name registry.
-+          In the latter case, an item of type
-+          <constant>KDBUS_ITEM_DST_NAME</constant> is mandatory.
-+          Also see
-+          <citerefentry>
-+            <refentrytitle>kdbus.name</refentrytitle>
-+            <manvolnum>7</manvolnum>
-+          </citerefentry>
-+          .
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>src_id</varname></term>
-+        <listitem><para>
-+          Upon return of the ioctl, this member will contain the sending
-+          connection's numerical ID. Should be 0 at send time.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>payload_type</varname></term>
-+        <listitem><para>
-+          Type of the payload in the actual data records. Currently, only
-+          <constant>KDBUS_PAYLOAD_DBUS</constant> is accepted as input value
-+          of this field. When receiving messages that are generated by the
-+          kernel (notifications), this field will contain
-+          <constant>KDBUS_PAYLOAD_KERNEL</constant>.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>cookie</varname></term>
-+        <listitem><para>
-+          Cookie of this message, for later recognition. Also, when replying
-+          to a message (see above), the <varname>cookie_reply</varname>
-+          field must match this value.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>timeout_ns</varname></term>
-+        <listitem><para>
-+          If the message sent requires a reply from the remote peer (see above),
-+          this field contains the timeout in absolute nanoseconds based on
-+          <constant>CLOCK_MONOTONIC</constant>. Also see
-+          <citerefentry>
-+            <refentrytitle>clock_gettime</refentrytitle>
-+            <manvolnum>2</manvolnum>
-+          </citerefentry>.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>cookie_reply</varname></term>
-+        <listitem><para>
-+          If the message sent is a reply to another message, this field must
-+          match the cookie of the formerly received message.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>items</varname></term>
-+        <listitem>
-+          <para>
-+            A dynamically sized list of items to contain additional information.
-+            The following items are expected/valid:
-+          </para>
-+          <variablelist>
-+            <varlistentry>
-+              <term><constant>KDBUS_ITEM_PAYLOAD_VEC</constant></term>
-+              <term><constant>KDBUS_ITEM_PAYLOAD_MEMFD</constant></term>
-+              <term><constant>KDBUS_ITEM_FDS</constant></term>
-+              <listitem>
-+                <para>
-+                  Actual data records containing the payload. See section
-+                  "Message payload".
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_ITEM_BLOOM_FILTER</constant></term>
-+              <listitem>
-+                <para>
-+                  Bloom filter for matches (see below).
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_ITEM_DST_NAME</constant></term>
-+              <listitem>
-+                <para>
-+                  Well-known name to send this message to. Required if
-+                  <varname>dst_id</varname> is set to
-+                  <constant>KDBUS_DST_ID_NAME</constant>.
-+                  If a connection holding the given name can't be found,
-+                  the ioctl will fail with <varname>errno</varname> set to
-+                  <constant>ESRCH</constant> is returned.
-+                </para>
-+                <para>
-+                  For messages to a unique name (ID), this item is optional. If
-+                  present, the kernel will make sure the name owner matches the
-+                  given unique name. This allows programs to tie the message
-+                  sending to the condition that a name is currently owned by a
-+                  certain unique name.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+          </variablelist>
-+        </listitem>
-+      </varlistentry>
-+    </variablelist>
-+
-+    <para>
-+      The message will be augmented by the requested metadata items when
-+      queued into the receiver's pool. See
-+      <citerefentry>
-+        <refentrytitle>kdbus.connection</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>
-+      and
-+      <citerefentry>
-+        <refentrytitle>kdbus.item</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>
-+      for more information on metadata.
-+    </para>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Receiving messages</title>
-+
-+    <para>
-+      Messages are received by the client with the
-+      <constant>KDBUS_CMD_RECV</constant> ioctl. The endpoint file of the bus
-+      supports <function>poll()/epoll()/select()</function>; when new messages
-+      are available on the connection's file descriptor,
-+      <constant>POLLIN</constant> is reported. For compatibility reasons,
-+      <constant>POLLOUT</constant> is always reported as well. Note, however,
-+      that the latter does not guarantee that a message can in fact be sent, as
-+      this depends on how many pending messages the receiver has in its pool.
-+    </para>
-+
-+    <para>
-+      With the <constant>KDBUS_CMD_RECV</constant> ioctl, a
-+      <type>struct kdbus_cmd_recv</type> is used.
-+    </para>
-+
-+    <programlisting>
-+struct kdbus_cmd_recv {
-+  __u64 size;
-+  __u64 flags;
-+  __u64 return_flags;
-+  __s64 priority;
-+  __u64 dropped_msgs;
-+  struct kdbus_msg_info msg;
-+  struct kdbus_item items[0];
-+};
-+    </programlisting>
-+
-+    <para>The fields in this struct are described below.</para>
-+
-+    <variablelist>
-+      <varlistentry>
-+        <term><varname>size</varname></term>
-+        <listitem><para>
-+          The overall size of the struct, including its items.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>flags</varname></term>
-+        <listitem><para>Flags to control the receive command.</para>
-+          <variablelist>
-+            <varlistentry>
-+              <term><constant>KDBUS_RECV_PEEK</constant></term>
-+              <listitem>
-+                <para>
-+                  Just return the location of the next message. Do not install
-+                  file descriptors or anything else. This is usually used to
-+                  determine the sender of the next queued message.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_RECV_DROP</constant></term>
-+              <listitem>
-+                <para>
-+                  Drop the next message without doing anything else with it,
-+                  and free the pool slice. This a short-cut for
-+                  <constant>KDBUS_RECV_PEEK</constant> and
-+                  <constant>KDBUS_CMD_FREE</constant>.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_RECV_USE_PRIORITY</constant></term>
-+              <listitem>
-+                <para>
-+                  Dequeue the messages ordered by their priority, and filtering
-+                  them with the priority field (see below).
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_FLAG_NEGOTIATE</constant></term>
-+              <listitem>
-+                <para>
-+                  Request a set of valid flags for this ioctl. When this bit is
-+                  set, no action is taken; the ioctl will fail with
-+                  <errorcode>-1</errorcode>, <varname>errno</varname>
-+                  is set to <constant>EPROTO</constant>.
-+                  Once the ioctl returned, the <varname>flags</varname>
-+                  field will have all bits set that the kernel recognizes as
-+                  valid for this command.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+          </variablelist>
-+        </listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>return_flags</varname></term>
-+        <listitem><para>
-+          Flags returned by the kernel. If the <varname>dropped_msgs</varname>
-+          field is non-zero, <constant>KDBUS_RECV_RETURN_DROPPED_MSGS</constant>
-+          is set. If a file descriptor could not be installed, the
-+          <constant>KDBUS_RECV_RETURN_INCOMPLETE_FDS</constant> flag is set.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>priority</varname></term>
-+        <listitem><para>
-+          With <constant>KDBUS_RECV_USE_PRIORITY</constant> set in
-+          <varname>flags</varname>, messages will be dequeued ordered by their
-+          priority, starting with the highest value. Also, messages will be
-+          filtered by the value given in this field, so the returned message
-+          will at least have the requested priority. If no such message is
-+          waiting in the queue, the ioctl will fail, and
-+          <varname>errno</varname> will be set to <constant>EAGAIN</constant>.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>dropped_msgs</varname></term>
-+        <listitem><para>
-+          Whenever a message with <constant>KDBUS_MSG_SIGNAL</constant> is sent
-+          but cannot be queued on a peer (e.g., as it contains FDs but the peer
-+          does not support FDs, or there is no space left in the peer's pool)
-+          the 'dropped_msgs' counter of the peer is incremented. On the next
-+          RECV ioctl, the 'dropped_msgs' field is copied into the ioctl struct
-+          and cleared on the peer. If it was non-zero, the
-+          <constant>KDBUS_RECV_RETURN_DROPPED_MSGS</constant> flag will be set
-+          in <varname>return_flags</varname>. Note that this will only happen
-+          if the ioctl succeeded or failed with <constant>EAGAIN</constant>. In
-+          other error cases, the 'dropped_msgs' field of the peer is left
-+          untouched.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>msg</varname></term>
-+        <listitem><para>
-+          Embedded struct containing information on the received message when
-+          this command succeeded (see below).
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>items</varname></term>
-+        <listitem><para>
-+          Items to specify further details for the receive command.
-+          Currently unused, and all items will be rejected with
-+          <varname>errno</varname> set to <constant>EINVAL</constant>.
-+        </para></listitem>
-+      </varlistentry>
-+    </variablelist>
-+
-+    <para>
-+      Both <type>struct kdbus_cmd_recv</type> and
-+      <type>struct kdbus_cmd_send</type> embed
-+      <type>struct kdbus_msg_info</type>.
-+      For the <constant>KDBUS_CMD_SEND</constant> ioctl, it is used to catch
-+      synchronous replies, if one was requested, and is unused otherwise.
-+    </para>
-+
-+    <programlisting>
-+struct kdbus_msg_info {
-+  __u64 offset;
-+  __u64 msg_size;
-+  __u64 return_flags;
-+};
-+    </programlisting>
-+
-+    <para>The fields in this struct are described below.</para>
-+
-+    <variablelist>
-+      <varlistentry>
-+        <term><varname>offset</varname></term>
-+        <listitem><para>
-+          Upon return of the ioctl, this field contains the offset in the
-+          receiver's memory pool. The memory must be freed with
-+          <constant>KDBUS_CMD_FREE</constant>. See
-+          <citerefentry>
-+            <refentrytitle>kdbus.pool</refentrytitle>
-+            <manvolnum>7</manvolnum>
-+          </citerefentry>
-+          for further details.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>msg_size</varname></term>
-+        <listitem><para>
-+          Upon successful return of the ioctl, this field contains the size of
-+          the allocated slice at offset <varname>offset</varname>.
-+          It is the combination of the size of the stored
-+          <type>struct kdbus_msg</type> object plus all appended VECs.
-+          You can use it in combination with <varname>offset</varname> to map
-+          a single message, instead of mapping the entire pool. See
-+          <citerefentry>
-+            <refentrytitle>kdbus.pool</refentrytitle>
-+            <manvolnum>7</manvolnum>
-+          </citerefentry>
-+          for further details.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>return_flags</varname></term>
-+        <listitem>
-+          <para>
-+            Kernel-provided return flags. Currently, the following flags are
-+            defined.
-+          </para>
-+          <variablelist>
-+            <varlistentry>
-+              <term><constant>KDBUS_RECV_RETURN_INCOMPLETE_FDS</constant></term>
-+              <listitem>
-+                <para>
-+                  The message contained memfds or file descriptors, and the
-+                  kernel failed to install one or more of them at receive time.
-+                  Most probably that happened because the maximum number of
-+                  file descriptors for the receiver's task were exceeded.
-+                  In such cases, the message is still delivered, so this is not
-+                  a fatal condition. File descriptors numbers inside the
-+                  <constant>KDBUS_ITEM_FDS</constant> item or memfd files
-+                  referenced by <constant>KDBUS_ITEM_PAYLOAD_MEMFD</constant>
-+                  items which could not be installed will be set to
-+                  <constant>-1</constant>.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+          </variablelist>
-+        </listitem>
-+      </varlistentry>
-+    </variablelist>
-+
-+    <para>
-+      Unless <constant>KDBUS_RECV_DROP</constant> was passed, the
-+      <varname>offset</varname> field contains the location of the new message
-+      inside the receiver's pool after the <constant>KDBUS_CMD_RECV</constant>
-+      ioctl was employed. The message is stored as <type>struct kdbus_msg</type>
-+      at this offset, and can be interpreted with the semantics described above.
-+    </para>
-+    <para>
-+      Also, if the connection allowed for file descriptor to be passed
-+      (<constant>KDBUS_HELLO_ACCEPT_FD</constant>), and if the message contained
-+      any, they will be installed into the receiving process when the
-+      <constant>KDBUS_CMD_RECV</constant> ioctl is called.
-+      <emphasis>memfds</emphasis> may always be part of the message payload.
-+      The receiving task is obliged to close all file descriptors appropriately
-+      once no longer needed. If <constant>KDBUS_RECV_PEEK</constant> is set, no
-+      file descriptors are installed. This allows for peeking at a message,
-+      looking at its metadata only and dropping it via
-+      <constant>KDBUS_RECV_DROP</constant>, without installing any of the file
-+      descriptors into the receiving process.
-+    </para>
-+    <para>
-+      The caller is obliged to call the <constant>KDBUS_CMD_FREE</constant>
-+      ioctl with the returned offset when the memory is no longer needed.
-+    </para>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Notifications</title>
-+    <para>
-+      A kernel notification is a regular kdbus message with the following
-+      details.
-+    </para>
-+
-+    <itemizedlist>
-+      <listitem><para>
-+          kdbus_msg.src_id == <constant>KDBUS_SRC_ID_KERNEL</constant>
-+      </para></listitem>
-+      <listitem><para>
-+        kdbus_msg.dst_id == <constant>KDBUS_DST_ID_BROADCAST</constant>
-+      </para></listitem>
-+      <listitem><para>
-+        kdbus_msg.payload_type == <constant>KDBUS_PAYLOAD_KERNEL</constant>
-+      </para></listitem>
-+      <listitem><para>
-+        Has exactly one of the items attached that are described below.
-+      </para></listitem>
-+      <listitem><para>
-+        Always has a timestamp item (<constant>KDBUS_ITEM_TIMESTAMP</constant>)
-+        attached.
-+      </para></listitem>
-+    </itemizedlist>
-+
-+    <para>
-+      The kernel will notify its users of the following events.
-+    </para>
-+
-+    <itemizedlist>
-+      <listitem><para>
-+        When connection <emphasis>A</emphasis> is terminated while connection
-+        <emphasis>B</emphasis> is waiting for a reply from it, connection
-+        <emphasis>B</emphasis> is notified with a message with an item of
-+        type <constant>KDBUS_ITEM_REPLY_DEAD</constant>.
-+      </para></listitem>
-+
-+      <listitem><para>
-+        When connection <emphasis>A</emphasis> does not receive a reply from
-+        connection <emphasis>B</emphasis> within the specified timeout window,
-+        connection <emphasis>A</emphasis> will receive a message with an
-+        item of type <constant>KDBUS_ITEM_REPLY_TIMEOUT</constant>.
-+      </para></listitem>
-+
-+      <listitem><para>
-+        When an ordinary connection (not a monitor) is created on or removed
-+        from a bus, messages with an item of type
-+        <constant>KDBUS_ITEM_ID_ADD</constant> or
-+        <constant>KDBUS_ITEM_ID_REMOVE</constant>, respectively, are delivered
-+        to all bus members that match these messages through their match
-+        database. Eavesdroppers (monitor connections) do not cause such
-+        notifications to be sent. They are invisible on the bus.
-+      </para></listitem>
-+
-+      <listitem><para>
-+        When a connection gains or loses ownership of a name, messages with an
-+        item of type <constant>KDBUS_ITEM_NAME_ADD</constant>,
-+        <constant>KDBUS_ITEM_NAME_REMOVE</constant> or
-+        <constant>KDBUS_ITEM_NAME_CHANGE</constant> are delivered to all bus
-+        members that match these messages through their match database.
-+      </para></listitem>
-+    </itemizedlist>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Return value</title>
-+    <para>
-+      On success, all mentioned ioctl commands return <errorcode>0</errorcode>;
-+      on error, <errorcode>-1</errorcode> is returned, and
-+      <varname>errno</varname> is set to indicate the error.
-+      If the issued ioctl is illegal for the file descriptor used,
-+      <varname>errno</varname> will be set to <constant>ENOTTY</constant>.
-+    </para>
-+
-+    <refsect2>
-+      <title>
-+        <constant>KDBUS_CMD_SEND</constant> may fail with the following
-+        errors
-+      </title>
-+
-+      <variablelist>
-+        <varlistentry>
-+          <term><constant>EOPNOTSUPP</constant></term>
-+          <listitem><para>
-+            The connection is not an ordinary connection, or the passed
-+            file descriptors in <constant>KDBUS_ITEM_FDS</constant> item are
-+            either kdbus handles or unix domain sockets. Both are currently
-+            unsupported.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EINVAL</constant></term>
-+          <listitem><para>
-+            The submitted payload type is
-+            <constant>KDBUS_PAYLOAD_KERNEL</constant>,
-+            <constant>KDBUS_MSG_EXPECT_REPLY</constant> was set without timeout
-+            or cookie values, <constant>KDBUS_SEND_SYNC_REPLY</constant> was
-+            set without <constant>KDBUS_MSG_EXPECT_REPLY</constant>, an invalid
-+            item was supplied, <constant>src_id</constant> was non-zero and was
-+            different from the current connection's ID, a supplied memfd had a
-+            size of 0, or a string was not properly null-terminated.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>ENOTUNIQ</constant></term>
-+          <listitem><para>
-+            The supplied destination is
-+            <constant>KDBUS_DST_ID_BROADCAST</constant> and either
-+            file descriptors were passed, or
-+            <constant>KDBUS_MSG_EXPECT_REPLY</constant> was set,
-+            or a timeout was given.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>E2BIG</constant></term>
-+          <listitem><para>
-+            Too many items.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EMSGSIZE</constant></term>
-+          <listitem><para>
-+            The size of the message header and items or the payload vector
-+            is excessive.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EEXIST</constant></term>
-+          <listitem><para>
-+            Multiple <constant>KDBUS_ITEM_FDS</constant>,
-+            <constant>KDBUS_ITEM_BLOOM_FILTER</constant> or
-+            <constant>KDBUS_ITEM_DST_NAME</constant> items were supplied.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EBADF</constant></term>
-+          <listitem><para>
-+            The supplied <constant>KDBUS_ITEM_FDS</constant> or
-+            <constant>KDBUS_ITEM_PAYLOAD_MEMFD</constant> items
-+            contained an illegal file descriptor.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EMEDIUMTYPE</constant></term>
-+          <listitem><para>
-+            The supplied memfd is not a sealed kdbus memfd.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EMFILE</constant></term>
-+          <listitem><para>
-+            Too many file descriptors inside a
-+            <constant>KDBUS_ITEM_FDS</constant>.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EBADMSG</constant></term>
-+          <listitem><para>
-+            An item had illegal size, both a <constant>dst_id</constant> and a
-+            <constant>KDBUS_ITEM_DST_NAME</constant> was given, or both a name
-+            and a bloom filter was given.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>ETXTBSY</constant></term>
-+          <listitem><para>
-+            The supplied kdbus memfd file cannot be sealed or the seal
-+            was removed, because it is shared with other processes or
-+            still mapped with
-+            <citerefentry>
-+              <refentrytitle>mmap</refentrytitle>
-+              <manvolnum>2</manvolnum>
-+            </citerefentry>.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>ECOMM</constant></term>
-+          <listitem><para>
-+            A peer does not accept the file descriptors addressed to it.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EFAULT</constant></term>
-+          <listitem><para>
-+            The supplied bloom filter size was not 64-bit aligned, or supplied
-+            memory could not be accessed by the kernel.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EDOM</constant></term>
-+          <listitem><para>
-+            The supplied bloom filter size did not match the bloom filter
-+            size of the bus.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EDESTADDRREQ</constant></term>
-+          <listitem><para>
-+            <constant>dst_id</constant> was set to
-+            <constant>KDBUS_DST_ID_NAME</constant>, but no
-+            <constant>KDBUS_ITEM_DST_NAME</constant> was attached.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>ESRCH</constant></term>
-+          <listitem><para>
-+            The name to look up was not found in the name registry.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EADDRNOTAVAIL</constant></term>
-+          <listitem><para>
-+            <constant>KDBUS_MSG_NO_AUTO_START</constant> was given but the
-+            destination connection is an activator.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>ENXIO</constant></term>
-+          <listitem><para>
-+            The passed numeric destination connection ID couldn't be found,
-+            or is not connected.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>ECONNRESET</constant></term>
-+          <listitem><para>
-+            The destination connection is no longer active.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>ETIMEDOUT</constant></term>
-+          <listitem><para>
-+            Timeout while synchronously waiting for a reply.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EINTR</constant></term>
-+          <listitem><para>
-+            Interrupted system call while synchronously waiting for a reply.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EPIPE</constant></term>
-+          <listitem><para>
-+            When sending a message, a synchronous reply from the receiving
-+            connection was expected but the connection died before answering.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>ENOBUFS</constant></term>
-+          <listitem><para>
-+            Too many pending messages on the receiver side.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EREMCHG</constant></term>
-+          <listitem><para>
-+            Both a well-known name and a unique name (ID) was given, but
-+            the name is not currently owned by that connection.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EXFULL</constant></term>
-+          <listitem><para>
-+            The memory pool of the receiver is full.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EREMOTEIO</constant></term>
-+          <listitem><para>
-+            While synchronously waiting for a reply, the remote peer
-+            failed with an I/O error.
-+          </para></listitem>
-+        </varlistentry>
-+      </variablelist>
-+    </refsect2>
-+
-+    <refsect2>
-+      <title>
-+        <constant>KDBUS_CMD_RECV</constant> may fail with the following
-+        errors
-+      </title>
-+
-+      <variablelist>
-+        <varlistentry>
-+          <term><constant>EOPNOTSUPP</constant></term>
-+          <listitem><para>
-+            The connection is not an ordinary connection, or the passed
-+            file descriptors are either kdbus handles or unix domain
-+            sockets. Both are currently unsupported.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EINVAL</constant></term>
-+          <listitem><para>
-+            Invalid flags or offset.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EAGAIN</constant></term>
-+          <listitem><para>
-+            No message found in the queue.
-+          </para></listitem>
-+        </varlistentry>
-+      </variablelist>
-+    </refsect2>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>See Also</title>
-+    <simplelist type="inline">
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.bus</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.connection</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.endpoint</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.fs</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.item</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.name</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.pool</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>clock_gettime</refentrytitle>
-+          <manvolnum>2</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>ioctl</refentrytitle>
-+          <manvolnum>2</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>poll</refentrytitle>
-+          <manvolnum>2</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>select</refentrytitle>
-+          <manvolnum>2</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>epoll</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>eventfd</refentrytitle>
-+          <manvolnum>2</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>memfd_create</refentrytitle>
-+          <manvolnum>2</manvolnum>
-+        </citerefentry>
-+      </member>
-+    </simplelist>
-+  </refsect1>
-+</refentry>
-diff --git a/Documentation/kdbus/kdbus.name.xml b/Documentation/kdbus/kdbus.name.xml
-new file mode 100644
-index 0000000..3f5f6a6
---- /dev/null
-+++ b/Documentation/kdbus/kdbus.name.xml
-@@ -0,0 +1,711 @@
-+<?xml version='1.0'?> <!--*-nxml-*-->
-+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
-+        "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
-+
-+<refentry id="kdbus.name">
-+
-+  <refentryinfo>
-+    <title>kdbus.name</title>
-+    <productname>kdbus.name</productname>
-+  </refentryinfo>
-+
-+  <refmeta>
-+    <refentrytitle>kdbus.name</refentrytitle>
-+    <manvolnum>7</manvolnum>
-+  </refmeta>
-+
-+  <refnamediv>
-+    <refname>kdbus.name</refname>
-+    <refpurpose>kdbus.name</refpurpose>
-+  </refnamediv>
-+
-+  <refsect1>
-+    <title>Description</title>
-+    <para>
-+      Each
-+      <citerefentry>
-+        <refentrytitle>kdbus.bus</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>
-+      instantiates a name registry to resolve well-known names into unique
-+      connection IDs for message delivery. The registry will be queried when a
-+      message is sent with <varname>kdbus_msg.dst_id</varname> set to
-+      <constant>KDBUS_DST_ID_NAME</constant>, or when a registry dump is
-+      requested with <constant>KDBUS_CMD_NAME_LIST</constant>.
-+    </para>
-+
-+    <para>
-+      All of the below is subject to policy rules for <emphasis>SEE</emphasis>
-+      and <emphasis>OWN</emphasis> permissions. See
-+      <citerefentry>
-+        <refentrytitle>kdbus.policy</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>
-+      for more information.
-+    </para>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Name validity</title>
-+    <para>
-+      A name has to comply with the following rules in order to be considered
-+      valid.
-+    </para>
-+
-+    <itemizedlist>
-+      <listitem>
-+        <para>
-+          The name has two or more elements separated by a
-+          '<literal>.</literal>' (period) character.
-+        </para>
-+      </listitem>
-+      <listitem>
-+        <para>
-+          All elements must contain at least one character.
-+        </para>
-+      </listitem>
-+      <listitem>
-+        <para>
-+          Each element must only contain the ASCII characters
-+          <literal>[A-Z][a-z][0-9]_</literal> and must not begin with a
-+          digit.
-+        </para>
-+      </listitem>
-+      <listitem>
-+        <para>
-+          The name must contain at least one '<literal>.</literal>' (period)
-+          character (and thus at least two elements).
-+        </para>
-+      </listitem>
-+      <listitem>
-+        <para>
-+          The name must not begin with a '<literal>.</literal>' (period)
-+          character.
-+        </para>
-+      </listitem>
-+      <listitem>
-+        <para>
-+          The name must not exceed <constant>255</constant> characters in
-+          length.
-+        </para>
-+      </listitem>
-+    </itemizedlist>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Acquiring a name</title>
-+    <para>
-+      To acquire a name, a client uses the
-+      <constant>KDBUS_CMD_NAME_ACQUIRE</constant> ioctl with
-+      <type>struct kdbus_cmd</type> as argument.
-+    </para>
-+
-+    <programlisting>
-+struct kdbus_cmd {
-+  __u64 size;
-+  __u64 flags;
-+  __u64 return_flags;
-+  struct kdbus_item items[0];
-+};
-+    </programlisting>
-+
-+    <para>The fields in this struct are described below.</para>
-+
-+    <variablelist>
-+      <varlistentry>
-+        <term><varname>size</varname></term>
-+        <listitem><para>
-+          The overall size of the struct, including its items.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>flags</varname></term>
-+        <listitem><para>Flags to control details in the name acquisition.</para>
-+          <variablelist>
-+            <varlistentry>
-+              <term><constant>KDBUS_NAME_REPLACE_EXISTING</constant></term>
-+              <listitem>
-+                <para>
-+                  Acquiring a name that is already present usually fails,
-+                  unless this flag is set in the call, and
-+                  <constant>KDBUS_NAME_ALLOW_REPLACEMENT</constant> (see below)
-+                  was set when the current owner of the name acquired it, or
-+                  if the current owner is an activator connection (see
-+                  <citerefentry>
-+                    <refentrytitle>kdbus.connection</refentrytitle>
-+                    <manvolnum>7</manvolnum>
-+                  </citerefentry>).
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_NAME_ALLOW_REPLACEMENT</constant></term>
-+              <listitem>
-+                <para>
-+                  Allow other connections to take over this name. When this
-+                  happens, the former owner of the connection will be notified
-+                  of the name loss.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_NAME_QUEUE</constant></term>
-+              <listitem>
-+                <para>
-+                  A name that is already acquired by a connection can not be
-+                  acquired again (unless the
-+                  <constant>KDBUS_NAME_ALLOW_REPLACEMENT</constant> flag was
-+                  set during acquisition; see above).
-+                  However, a connection can put itself in a queue of
-+                  connections waiting for the name to be released. Once that
-+                  happens, the first connection in that queue becomes the new
-+                  owner and is notified accordingly.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_FLAG_NEGOTIATE</constant></term>
-+              <listitem>
-+                <para>
-+                  Request a set of valid flags for this ioctl. When this bit is
-+                  set, no action is taken; the ioctl will fail with
-+                  <errorcode>-1</errorcode>, and <varname>errno</varname>
-+                  is set to <constant>EPROTO</constant>.
-+                  Once the ioctl returned, the <varname>flags</varname>
-+                  field will have all bits set that the kernel recognizes as
-+                  valid for this command.
-+                  The <constant>KDBUS_FLAG_NEGOTIATE</constant> bit will be
-+                  cleared by the operation.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+          </variablelist>
-+        </listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>return_flags</varname></term>
-+        <listitem>
-+          <para>
-+            Flags returned by the kernel. Currently, the following may be
-+            returned by the kernel.
-+          </para>
-+          <variablelist>
-+            <varlistentry>
-+              <term><constant>KDBUS_NAME_IN_QUEUE</constant></term>
-+              <listitem>
-+                <para>
-+                  The name was not acquired yet, but the connection was
-+                  placed in the queue of peers waiting for the name.
-+                  This can only happen if <constant>KDBUS_NAME_QUEUE</constant>
-+                  was set in the <varname>flags</varname> member (see above).
-+                  The connection will receive a name owner change notification
-+                  once the current owner has given up the name and its
-+                  ownership was transferred.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+          </variablelist>
-+        </listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>items</varname></term>
-+        <listitem>
-+          <para>
-+            Items to submit the name. Currently, one item of type
-+            <constant>KDBUS_ITEM_NAME</constant> is expected and allowed, and
-+            the contained string must be a valid bus name.
-+            <constant>KDBUS_ITEM_NEGOTIATE</constant> may be used to probe for
-+            valid item types. See
-+            <citerefentry>
-+              <refentrytitle>kdbus.item</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>
-+            for a detailed description of how this item is used.
-+          </para>
-+          <para>
-+            Unrecognized items are rejected, and the ioctl will fail with
-+            <varname>errno</varname> set to <errorname>>EINVAL</errorname>.
-+          </para>
-+        </listitem>
-+      </varlistentry>
-+    </variablelist>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Releasing a name</title>
-+    <para>
-+      A connection may release a name explicitly with the
-+      <constant>KDBUS_CMD_NAME_RELEASE</constant> ioctl. If the connection was
-+      an implementer of an activatable name, its pending messages are moved
-+      back to the activator. If there are any connections queued up as waiters
-+      for the name, the first one in the queue (the oldest entry) will become
-+      the new owner. The same happens implicitly for all names once a
-+      connection terminates. See
-+      <citerefentry>
-+        <refentrytitle>kdbus.connection</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>
-+      for more information on connections.
-+    </para>
-+    <para>
-+      The <constant>KDBUS_CMD_NAME_RELEASE</constant> ioctl uses the same data
-+      structure as the acquisition call
-+      (<constant>KDBUS_CMD_NAME_ACQUIRE</constant>),
-+      but with slightly different field usage.
-+    </para>
-+
-+    <programlisting>
-+struct kdbus_cmd {
-+  __u64 size;
-+  __u64 flags;
-+  __u64 return_flags;
-+  struct kdbus_item items[0];
-+};
-+    </programlisting>
-+
-+    <para>The fields in this struct are described below.</para>
-+
-+    <variablelist>
-+      <varlistentry>
-+        <term><varname>size</varname></term>
-+        <listitem><para>
-+          The overall size of the struct, including its items.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>flags</varname></term>
-+        <listitem><para>
-+          Flags to the command. Currently unused.
-+          <constant>KDBUS_FLAG_NEGOTIATE</constant> is accepted to probe for
-+          valid flags. If set, the ioctl will return <errorcode>0</errorcode>,
-+          and the <varname>flags</varname> field is set to
-+          <constant>0</constant>.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>return_flags</varname></term>
-+        <listitem><para>
-+          Flags returned by the kernel. Currently unused and always set to
-+          <constant>0</constant> by the kernel.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>items</varname></term>
-+        <listitem>
-+          <para>
-+            Items to submit the name. Currently, one item of type
-+            <constant>KDBUS_ITEM_NAME</constant> is expected and allowed, and
-+            the contained string must be a valid bus name.
-+            <constant>KDBUS_ITEM_NEGOTIATE</constant> may be used to probe for
-+            valid item types. See
-+            <citerefentry>
-+              <refentrytitle>kdbus.item</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>
-+            for a detailed description of how this item is used.
-+          </para>
-+          <para>
-+            Unrecognized items are rejected, and the ioctl will fail with
-+            <varname>errno</varname> set to <constant>EINVAL</constant>.
-+          </para>
-+        </listitem>
-+      </varlistentry>
-+    </variablelist>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Dumping the name registry</title>
-+    <para>
-+      A connection may request a complete or filtered dump of currently active
-+      bus names with the <constant>KDBUS_CMD_LIST</constant> ioctl, which
-+      takes a <type>struct kdbus_cmd_list</type> as argument.
-+    </para>
-+
-+    <programlisting>
-+struct kdbus_cmd_list {
-+  __u64 flags;
-+  __u64 return_flags;
-+  __u64 offset;
-+};
-+    </programlisting>
-+
-+    <para>The fields in this struct are described below.</para>
-+
-+    <variablelist>
-+      <varlistentry>
-+        <term><varname>flags</varname></term>
-+        <listitem>
-+          <para>
-+            Any combination of flags to specify which names should be dumped.
-+          </para>
-+          <variablelist>
-+            <varlistentry>
-+              <term><constant>KDBUS_LIST_UNIQUE</constant></term>
-+              <listitem>
-+                <para>
-+                  List the unique (numeric) IDs of the connection, whether it
-+                  owns a name or not.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_LIST_NAMES</constant></term>
-+              <listitem>
-+                <para>
-+                  List well-known names stored in the database which are
-+                  actively owned by a real connection (not an activator).
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_LIST_ACTIVATORS</constant></term>
-+              <listitem>
-+                <para>
-+                  List names that are owned by an activator.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_LIST_QUEUED</constant></term>
-+              <listitem>
-+                <para>
-+                  List connections that are not yet owning a name but are
-+                  waiting for it to become available.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_FLAG_NEGOTIATE</constant></term>
-+              <listitem>
-+                <para>
-+                  Request a set of valid flags for this ioctl. When this bit is
-+                  set, no action is taken; the ioctl will fail with
-+                  <errorcode>-1</errorcode>, and <varname>errno</varname>
-+                  is set to <constant>EPROTO</constant>.
-+                  Once the ioctl returned, the <varname>flags</varname>
-+                  field will have all bits set that the kernel recognizes as
-+                  valid for this command.
-+                  The <constant>KDBUS_FLAG_NEGOTIATE</constant> bit will be
-+                  cleared by the operation.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+          </variablelist>
-+        </listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>return_flags</varname></term>
-+        <listitem><para>
-+          Flags returned by the kernel. Currently unused and always set to
-+          <constant>0</constant> by the kernel.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>offset</varname></term>
-+        <listitem><para>
-+          When the ioctl returns successfully, the offset to the name registry
-+          dump inside the connection's pool will be stored in this field.
-+        </para></listitem>
-+      </varlistentry>
-+    </variablelist>
-+
-+    <para>
-+      The returned list of names is stored in a <type>struct kdbus_list</type>
-+      that in turn contains an array of type <type>struct kdbus_info</type>,
-+      The array-size in bytes is given as <varname>list_size</varname>.
-+      The fields inside <type>struct kdbus_info</type> is described next.
-+    </para>
-+
-+    <programlisting>
-+struct kdbus_info {
-+  __u64 size;
-+  __u64 id;
-+  __u64 flags;
-+  struct kdbus_item items[0];
-+};
-+    </programlisting>
-+
-+    <para>The fields in this struct are described below.</para>
-+
-+    <variablelist>
-+      <varlistentry>
-+        <term><varname>size</varname></term>
-+        <listitem><para>
-+          The overall size of the struct, including its items.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>id</varname></term>
-+        <listitem><para>
-+          The owning connection's unique ID.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>flags</varname></term>
-+        <listitem><para>
-+          The flags of the owning connection.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>items</varname></term>
-+        <listitem>
-+          <para>
-+            Items containing the actual name. Currently, one item of type
-+            <constant>KDBUS_ITEM_OWNED_NAME</constant> will be attached,
-+            including the name's flags. In that item, the flags field of the
-+            name may carry the following bits:
-+          </para>
-+          <variablelist>
-+            <varlistentry>
-+              <term><constant>KDBUS_NAME_ALLOW_REPLACEMENT</constant></term>
-+              <listitem>
-+                <para>
-+                  Other connections are allowed to take over this name from the
-+                  connection that owns it.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_NAME_IN_QUEUE</constant></term>
-+              <listitem>
-+                <para>
-+                  When retrieving a list of currently acquired names in the
-+                  registry, this flag indicates whether the connection
-+                  actually owns the name or is currently waiting for it to
-+                  become available.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_NAME_ACTIVATOR</constant></term>
-+              <listitem>
-+                <para>
-+                  An activator connection owns a name as a placeholder for an
-+                  implementer, which is started on demand by programs as soon
-+                  as the first message arrives. There's some more information
-+                  on this topic in
-+                  <citerefentry>
-+                    <refentrytitle>kdbus.connection</refentrytitle>
-+                    <manvolnum>7</manvolnum>
-+                  </citerefentry>
-+                  .
-+                </para>
-+                <para>
-+                  In contrast to
-+                  <constant>KDBUS_NAME_REPLACE_EXISTING</constant>,
-+                  when a name is taken over from an activator connection, all
-+                  the messages that have been queued in the activator
-+                  connection will be moved over to the new owner. The activator
-+                  connection will still be tracked for the name and will take
-+                  control again if the implementer connection terminates.
-+                </para>
-+                <para>
-+                  This flag can not be used when acquiring a name, but is
-+                  implicitly set through <constant>KDBUS_CMD_HELLO</constant>
-+                  with <constant>KDBUS_HELLO_ACTIVATOR</constant> set in
-+                  <varname>kdbus_cmd_hello.conn_flags</varname>.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_FLAG_NEGOTIATE</constant></term>
-+              <listitem>
-+                <para>
-+                  Requests a set of valid flags for this ioctl. When this bit is
-+                  set, no action is taken; the ioctl will return
-+                  <errorcode>0</errorcode>, and the <varname>flags</varname>
-+                  field will have all bits set that are valid for this command.
-+                  The <constant>KDBUS_FLAG_NEGOTIATE</constant> bit will be
-+                  cleared by the operation.
-+                </para>
-+              </listitem>
-+            </varlistentry>
-+          </variablelist>
-+        </listitem>
-+      </varlistentry>
-+    </variablelist>
-+
-+    <para>
-+      The returned buffer must be freed with the
-+      <constant>KDBUS_CMD_FREE</constant> ioctl when the user is finished with
-+      it. See
-+      <citerefentry>
-+        <refentrytitle>kdbus.pool</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>
-+      for more information.
-+    </para>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Return value</title>
-+    <para>
-+      On success, all mentioned ioctl commands return <errorcode>0</errorcode>;
-+      on error, <errorcode>-1</errorcode> is returned, and
-+      <varname>errno</varname> is set to indicate the error.
-+      If the issued ioctl is illegal for the file descriptor used,
-+      <varname>errno</varname> will be set to <constant>ENOTTY</constant>.
-+    </para>
-+
-+    <refsect2>
-+      <title>
-+        <constant>KDBUS_CMD_NAME_ACQUIRE</constant> may fail with the following
-+        errors
-+      </title>
-+
-+      <variablelist>
-+        <varlistentry>
-+          <term><constant>EINVAL</constant></term>
-+          <listitem><para>
-+            Illegal command flags, illegal name provided, or an activator
-+            tried to acquire a second name.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EPERM</constant></term>
-+          <listitem><para>
-+            Policy prohibited name ownership.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EALREADY</constant></term>
-+          <listitem><para>
-+            Connection already owns that name.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EEXIST</constant></term>
-+          <listitem><para>
-+            The name already exists and can not be taken over.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>E2BIG</constant></term>
-+          <listitem><para>
-+            The maximum number of well-known names per connection is exhausted.
-+          </para></listitem>
-+        </varlistentry>
-+      </variablelist>
-+    </refsect2>
-+
-+    <refsect2>
-+      <title>
-+        <constant>KDBUS_CMD_NAME_RELEASE</constant>
-+        may fail with the following errors
-+      </title>
-+
-+      <variablelist>
-+        <varlistentry>
-+          <term><constant>EINVAL</constant></term>
-+          <listitem><para>
-+            Invalid command flags, or invalid name provided.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>ESRCH</constant></term>
-+          <listitem><para>
-+            Name is not found in the registry.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EADDRINUSE</constant></term>
-+          <listitem><para>
-+            Name is owned by a different connection and can't be released.
-+          </para></listitem>
-+        </varlistentry>
-+      </variablelist>
-+    </refsect2>
-+
-+    <refsect2>
-+      <title>
-+        <constant>KDBUS_CMD_LIST</constant> may fail with the following
-+        errors
-+      </title>
-+
-+      <variablelist>
-+        <varlistentry>
-+          <term><constant>EINVAL</constant></term>
-+          <listitem><para>
-+            Invalid command flags
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>ENOBUFS</constant></term>
-+          <listitem><para>
-+            No available memory in the connection's pool.
-+          </para></listitem>
-+        </varlistentry>
-+      </variablelist>
-+    </refsect2>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>See Also</title>
-+    <simplelist type="inline">
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.bus</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.connection</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.item</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.policy</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.pool</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+    </simplelist>
-+  </refsect1>
-+</refentry>
-diff --git a/Documentation/kdbus/kdbus.policy.xml b/Documentation/kdbus/kdbus.policy.xml
-new file mode 100644
-index 0000000..6732416
---- /dev/null
-+++ b/Documentation/kdbus/kdbus.policy.xml
-@@ -0,0 +1,406 @@
-+<?xml version='1.0'?> <!--*-nxml-*-->
-+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
-+        "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
-+
-+<refentry id="kdbus.policy">
-+
-+  <refentryinfo>
-+    <title>kdbus.policy</title>
-+    <productname>kdbus.policy</productname>
-+  </refentryinfo>
-+
-+  <refmeta>
-+    <refentrytitle>kdbus.policy</refentrytitle>
-+    <manvolnum>7</manvolnum>
-+  </refmeta>
-+
-+  <refnamediv>
-+    <refname>kdbus.policy</refname>
-+    <refpurpose>kdbus policy</refpurpose>
-+  </refnamediv>
-+
-+  <refsect1>
-+    <title>Description</title>
-+
-+    <para>
-+      A kdbus policy restricts the possibilities of connections to own, see and
-+      talk to well-known names. A policy can be associated with a bus (through a
-+      policy holder connection) or a custom endpoint. kdbus stores its policy
-+      information in a database that can be accessed through the following
-+      ioctl commands:
-+    </para>
-+
-+    <variablelist>
-+      <varlistentry>
-+        <term><constant>KDBUS_CMD_HELLO</constant></term>
-+        <listitem><para>
-+          When creating, or updating, a policy holder connection. See
-+          <citerefentry>
-+            <refentrytitle>kdbus.connection</refentrytitle>
-+            <manvolnum>7</manvolnum>
-+          </citerefentry>.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><constant>KDBUS_CMD_ENDPOINT_MAKE</constant></term>
-+        <term><constant>KDBUS_CMD_ENDPOINT_UPDATE</constant></term>
-+        <listitem><para>
-+          When creating, or updating, a bus custom endpoint. See
-+          <citerefentry>
-+            <refentrytitle>kdbus.endpoint</refentrytitle>
-+            <manvolnum>7</manvolnum>
-+          </citerefentry>.
-+        </para></listitem>
-+      </varlistentry>
-+    </variablelist>
-+
-+    <para>
-+      In all cases, the name and policy access information is stored in items
-+      of type <constant>KDBUS_ITEM_NAME</constant> and
-+      <constant>KDBUS_ITEM_POLICY_ACCESS</constant>. For this transport, the
-+      following rules apply.
-+    </para>
-+
-+    <itemizedlist>
-+      <listitem>
-+        <para>
-+          An item of type <constant>KDBUS_ITEM_NAME</constant> must be followed
-+          by at least one <constant>KDBUS_ITEM_POLICY_ACCESS</constant> item.
-+        </para>
-+      </listitem>
-+
-+      <listitem>
-+        <para>
-+          An item of type <constant>KDBUS_ITEM_NAME</constant> can be followed
-+          by an arbitrary number of
-+          <constant>KDBUS_ITEM_POLICY_ACCESS</constant> items.
-+        </para>
-+      </listitem>
-+
-+      <listitem>
-+        <para>
-+          An arbitrary number of groups of names and access levels can be given.
-+        </para>
-+      </listitem>
-+    </itemizedlist>
-+
-+    <para>
-+      Names passed in items of type <constant>KDBUS_ITEM_NAME</constant> must
-+      comply to the rules of valid kdbus.name. See
-+      <citerefentry>
-+        <refentrytitle>kdbus.name</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>
-+      for more information.
-+
-+      The payload of an item of type
-+      <constant>KDBUS_ITEM_POLICY_ACCESS</constant> is defined by the following
-+      struct. For more information on the layout of items, please refer to
-+      <citerefentry>
-+        <refentrytitle>kdbus.item</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>.
-+    </para>
-+
-+    <programlisting>
-+struct kdbus_policy_access {
-+  __u64 type;
-+  __u64 access;
-+  __u64 id;
-+};
-+    </programlisting>
-+
-+    <para>The fields in this struct are described below.</para>
-+
-+    <variablelist>
-+      <varlistentry>
-+        <term><varname>type</varname></term>
-+        <listitem>
-+          <para>
-+            One of the following.
-+          </para>
-+
-+          <variablelist>
-+            <varlistentry>
-+              <term><constant>KDBUS_POLICY_ACCESS_USER</constant></term>
-+              <listitem><para>
-+                Grant access to a user with the UID stored in the
-+                <varname>id</varname> field.
-+              </para></listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_POLICY_ACCESS_GROUP</constant></term>
-+              <listitem><para>
-+                Grant access to a user with the GID stored in the
-+                <varname>id</varname> field.
-+              </para></listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_POLICY_ACCESS_WORLD</constant></term>
-+              <listitem><para>
-+                Grant access to everyone. The <varname>id</varname> field
-+                is ignored.
-+              </para></listitem>
-+            </varlistentry>
-+          </variablelist>
-+        </listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>access</varname></term>
-+        <listitem>
-+          <para>
-+            The access to grant. One of the following.
-+          </para>
-+
-+          <variablelist>
-+            <varlistentry>
-+              <term><constant>KDBUS_POLICY_SEE</constant></term>
-+              <listitem><para>
-+                Allow the name to be seen.
-+              </para></listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_POLICY_TALK</constant></term>
-+              <listitem><para>
-+                Allow the name to be talked to.
-+              </para></listitem>
-+            </varlistentry>
-+
-+            <varlistentry>
-+              <term><constant>KDBUS_POLICY_OWN</constant></term>
-+              <listitem><para>
-+                Allow the name to be owned.
-+              </para></listitem>
-+            </varlistentry>
-+          </variablelist>
-+        </listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>id</varname></term>
-+        <listitem><para>
-+           For <constant>KDBUS_POLICY_ACCESS_USER</constant>, stores the UID.
-+           For <constant>KDBUS_POLICY_ACCESS_GROUP</constant>, stores the GID.
-+        </para></listitem>
-+      </varlistentry>
-+
-+    </variablelist>
-+
-+    <para>
-+      All endpoints of buses have an empty policy database by default.
-+      Therefore, unless policy rules are added, all operations will also be
-+      denied by default. Also see
-+      <citerefentry>
-+        <refentrytitle>kdbus.endpoint</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>.
-+    </para>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Wildcard names</title>
-+    <para>
-+      Policy holder connections may upload names that contain the wildcard
-+      suffix (<literal>".*"</literal>). Such a policy entry is effective for
-+      every well-known name that extends the provided name by exactly one more
-+      level.
-+
-+      For example, the name <literal>foo.bar.*</literal> matches both
-+      <literal>"foo.bar.baz"</literal> and
-+      <literal>"foo.bar.bazbaz"</literal> are, but not
-+      <literal>"foo.bar.baz.baz"</literal>.
-+
-+      This allows connections to take control over multiple names that the
-+      policy holder doesn't need to know about when uploading the policy.
-+
-+      Such wildcard entries are not allowed for custom endpoints.
-+    </para>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Privileged connections</title>
-+    <para>
-+      The policy database is overruled when action is taken by a privileged
-+      connection. Please refer to
-+      <citerefentry>
-+        <refentrytitle>kdbus.connection</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>
-+      for more information on what makes a connection privileged.
-+    </para>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Examples</title>
-+    <para>
-+      For instance, a set of policy rules may look like this:
-+    </para>
-+
-+    <programlisting>
-+KDBUS_ITEM_NAME: str='org.foo.bar'
-+KDBUS_ITEM_POLICY_ACCESS: type=USER, access=OWN, ID=1000
-+KDBUS_ITEM_POLICY_ACCESS: type=USER, access=TALK, ID=1001
-+KDBUS_ITEM_POLICY_ACCESS: type=WORLD, access=SEE
-+
-+KDBUS_ITEM_NAME: str='org.blah.baz'
-+KDBUS_ITEM_POLICY_ACCESS: type=USER, access=OWN, ID=0
-+KDBUS_ITEM_POLICY_ACCESS: type=WORLD, access=TALK
-+    </programlisting>
-+
-+    <para>
-+      That means that 'org.foo.bar' may only be owned by UID 1000, but every
-+      user on the bus is allowed to see the name. However, only UID 1001 may
-+      actually send a message to the connection and receive a reply from it.
-+
-+      The second rule allows 'org.blah.baz' to be owned by UID 0 only, but
-+      every user may talk to it.
-+    </para>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>TALK access and multiple well-known names per connection</title>
-+    <para>
-+      Note that TALK access is checked against all names of a connection. For
-+      example, if a connection owns both <constant>'org.foo.bar'</constant> and
-+      <constant>'org.blah.baz'</constant>, and the policy database allows
-+      <constant>'org.blah.baz'</constant> to be talked to by WORLD, then this
-+      permission is also granted to <constant>'org.foo.bar'</constant>. That
-+      might sound illogical, but after all, we allow messages to be directed to
-+      either the ID or a well-known name, and policy is applied to the
-+      connection, not the name. In other words, the effective TALK policy for a
-+      connection is the most permissive of all names the connection owns.
-+
-+      For broadcast messages, the receiver needs TALK permissions to the sender
-+      to receive the broadcast.
-+    </para>
-+    <para>
-+      Both the endpoint and the bus policy databases are consulted to allow
-+      name registry listing, owning a well-known name and message delivery.
-+      If either one fails, the operation is failed with
-+      <varname>errno</varname> set to <constant>EPERM</constant>.
-+
-+      For best practices, connections that own names with a restricted TALK
-+      access should not install matches. This avoids cases where the sent
-+      message may pass the bloom filter due to false-positives and may also
-+      satisfy the policy rules.
-+
-+      Also see
-+      <citerefentry>
-+        <refentrytitle>kdbus.match</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>.
-+    </para>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Implicit policies</title>
-+    <para>
-+      Depending on the type of the endpoint, a set of implicit rules that
-+      override installed policies might be enforced.
-+
-+      On default endpoints, the following set is enforced and checked before
-+      any user-supplied policy is checked.
-+    </para>
-+
-+    <itemizedlist>
-+      <listitem>
-+        <para>
-+          Privileged connections always override any installed policy. Those
-+          connections could easily install their own policies, so there is no
-+          reason to enforce installed policies.
-+        </para>
-+      </listitem>
-+      <listitem>
-+        <para>
-+          Connections can always talk to connections of the same user. This
-+          includes broadcast messages.
-+        </para>
-+      </listitem>
-+    </itemizedlist>
-+
-+    <para>
-+      Custom endpoints have stricter policies. The following rules apply:
-+    </para>
-+
-+    <itemizedlist>
-+      <listitem>
-+        <para>
-+          Policy rules are always enforced, even if the connection is a
-+          privileged connection.
-+        </para>
-+      </listitem>
-+      <listitem>
-+        <para>
-+          Policy rules are always enforced for <constant>TALK</constant> access,
-+          even if both ends are running under the same user. This includes
-+          broadcast messages.
-+        </para>
-+      </listitem>
-+      <listitem>
-+        <para>
-+          To restrict the set of names that can be seen, endpoint policies can
-+          install <constant>SEE</constant> policies.
-+        </para>
-+      </listitem>
-+    </itemizedlist>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>See Also</title>
-+    <simplelist type="inline">
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.bus</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.endpoint</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.fs</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.item</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.message</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.name</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.pool</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+    </simplelist>
-+  </refsect1>
-+</refentry>
-diff --git a/Documentation/kdbus/kdbus.pool.xml b/Documentation/kdbus/kdbus.pool.xml
-new file mode 100644
-index 0000000..a9e16f1
---- /dev/null
-+++ b/Documentation/kdbus/kdbus.pool.xml
-@@ -0,0 +1,326 @@
-+<?xml version='1.0'?> <!--*-nxml-*-->
-+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
-+        "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
-+
-+<refentry id="kdbus.pool">
-+
-+  <refentryinfo>
-+    <title>kdbus.pool</title>
-+    <productname>kdbus.pool</productname>
-+  </refentryinfo>
-+
-+  <refmeta>
-+    <refentrytitle>kdbus.pool</refentrytitle>
-+    <manvolnum>7</manvolnum>
-+  </refmeta>
-+
-+  <refnamediv>
-+    <refname>kdbus.pool</refname>
-+    <refpurpose>kdbus pool</refpurpose>
-+  </refnamediv>
-+
-+  <refsect1>
-+    <title>Description</title>
-+    <para>
-+      A pool for data received from the kernel is installed for every
-+      <emphasis>connection</emphasis> of the <emphasis>bus</emphasis>, and
-+      is sized according to the information stored in the
-+      <varname>pool_size</varname> member of <type>struct kdbus_cmd_hello</type>
-+      when <constant>KDBUS_CMD_HELLO</constant> is employed. Internally, the
-+      pool is segmented into <emphasis>slices</emphasis>, each referenced by its
-+      <emphasis>offset</emphasis> in the pool, expressed in <type>bytes</type>.
-+      See
-+      <citerefentry>
-+        <refentrytitle>kdbus.connection</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>
-+      for more information about <constant>KDBUS_CMD_HELLO</constant>.
-+    </para>
-+
-+    <para>
-+      The pool is written to by the kernel when one of the following
-+      <emphasis>ioctls</emphasis> is issued:
-+
-+      <variablelist>
-+        <varlistentry>
-+          <term><constant>KDBUS_CMD_HELLO</constant></term>
-+          <listitem><para>
-+            ... to receive details about the bus the connection was made to
-+          </para></listitem>
-+        </varlistentry>
-+        <varlistentry>
-+          <term><constant>KDBUS_CMD_RECV</constant></term>
-+          <listitem><para>
-+            ... to receive a message
-+          </para></listitem>
-+        </varlistentry>
-+        <varlistentry>
-+          <term><constant>KDBUS_CMD_LIST</constant></term>
-+          <listitem><para>
-+            ... to dump the name registry
-+          </para></listitem>
-+        </varlistentry>
-+        <varlistentry>
-+          <term><constant>KDBUS_CMD_CONN_INFO</constant></term>
-+          <listitem><para>
-+            ... to retrieve information on a connection
-+          </para></listitem>
-+        </varlistentry>
-+        <varlistentry>
-+          <term><constant>KDBUS_CMD_BUS_CREATOR_INFO</constant></term>
-+          <listitem><para>
-+            ... to retrieve information about a connection's bus creator
-+          </para></listitem>
-+        </varlistentry>
-+      </variablelist>
-+
-+    </para>
-+    <para>
-+      The <varname>offset</varname> fields returned by either one of the
-+      aforementioned ioctls describe offsets inside the pool. In order to make
-+      the slice available for subsequent calls,
-+      <constant>KDBUS_CMD_FREE</constant> has to be called on that offset
-+      (see below). Otherwise, the pool will fill up, and the connection won't
-+      be able to receive any more information through its pool.
-+    </para>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Pool slice allocation</title>
-+    <para>
-+      Pool slices are allocated by the kernel in order to report information
-+      back to a task, such as messages, returned name list etc.
-+      Allocation of pool slices cannot be initiated by userspace. See
-+      <citerefentry>
-+        <refentrytitle>kdbus.connection</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>
-+      and
-+      <citerefentry>
-+        <refentrytitle>kdbus.name</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>
-+      for examples of commands that use the <emphasis>pool</emphasis> to
-+      return data.
-+    </para>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Accessing the pool memory</title>
-+    <para>
-+      Memory in the pool is read-only for userspace and may only be written
-+      to by the kernel. To read from the pool memory, the caller is expected to
-+      <citerefentry>
-+        <refentrytitle>mmap</refentrytitle>
-+        <manvolnum>2</manvolnum>
-+      </citerefentry>
-+      the buffer into its task, like this:
-+    </para>
-+    <programlisting>
-+uint8_t *buf = mmap(NULL, size, PROT_READ, MAP_SHARED, conn_fd, 0);
-+    </programlisting>
-+
-+    <para>
-+      In order to map the entire pool, the <varname>size</varname> parameter in
-+      the example above should be set to the value of the
-+      <varname>pool_size</varname> member of
-+      <type>struct kdbus_cmd_hello</type> when
-+      <constant>KDBUS_CMD_HELLO</constant> was employed to create the
-+      connection (see above).
-+    </para>
-+
-+    <para>
-+      The <emphasis>file descriptor</emphasis> used to map the memory must be
-+      the one that was used to create the <emphasis>connection</emphasis>.
-+      In other words, the one that was used to call
-+      <constant>KDBUS_CMD_HELLO</constant>. See
-+      <citerefentry>
-+        <refentrytitle>kdbus.connection</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>
-+      for more details.
-+    </para>
-+
-+    <para>
-+      Alternatively, instead of mapping the entire pool buffer, only parts
-+      of it can be mapped. Every kdbus command that returns an
-+      <emphasis>offset</emphasis> (see above) also reports a
-+      <emphasis>size</emphasis> along with it, so programs can be written
-+      in a way that it only maps portions of the pool to access a specific
-+      <emphasis>slice</emphasis>.
-+    </para>
-+
-+    <para>
-+      When access to the pool memory is no longer needed, programs should
-+      call <function>munmap()</function> on the pointer returned by
-+      <function>mmap()</function>.
-+    </para>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Freeing pool slices</title>
-+    <para>
-+      The <constant>KDBUS_CMD_FREE</constant> ioctl is used to free a slice
-+      inside the pool, describing an offset that was returned in an
-+      <varname>offset</varname> field of another ioctl struct.
-+      The <constant>KDBUS_CMD_FREE</constant> command takes a
-+      <type>struct kdbus_cmd_free</type> as argument.
-+    </para>
-+
-+<programlisting>
-+struct kdbus_cmd_free {
-+  __u64 size;
-+  __u64 flags;
-+  __u64 return_flags;
-+  __u64 offset;
-+  struct kdbus_item items[0];
-+};
-+</programlisting>
-+
-+    <para>The fields in this struct are described below.</para>
-+
-+    <variablelist>
-+      <varlistentry>
-+        <term><varname>size</varname></term>
-+        <listitem><para>
-+          The overall size of the struct, including its items.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>flags</varname></term>
-+        <listitem><para>
-+          Currently unused.
-+          <constant>KDBUS_FLAG_NEGOTIATE</constant> is accepted to probe for
-+          valid flags. If set, the ioctl will return <errorcode>0</errorcode>,
-+          and the <varname>flags</varname> field is set to
-+          <constant>0</constant>.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>return_flags</varname></term>
-+        <listitem><para>
-+          Flags returned by the kernel. Currently unused and always set to
-+          <constant>0</constant> by the kernel.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>offset</varname></term>
-+        <listitem><para>
-+          The offset to free, as returned by other ioctls that allocated
-+          memory for returned information.
-+        </para></listitem>
-+      </varlistentry>
-+
-+      <varlistentry>
-+        <term><varname>items</varname></term>
-+        <listitem><para>
-+          Items to specify further details for the receive command.
-+          Currently unused.
-+          Unrecognized items are rejected, and the ioctl will fail with
-+          <varname>errno</varname> set to <constant>EINVAL</constant>.
-+          All items except for
-+          <constant>KDBUS_ITEM_NEGOTIATE</constant> (see
-+            <citerefentry>
-+              <refentrytitle>kdbus.item</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>
-+          ) will be rejected.
-+        </para></listitem>
-+      </varlistentry>
-+    </variablelist>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Return value</title>
-+    <para>
-+      On success, all mentioned ioctl commands return <errorcode>0</errorcode>;
-+      on error, <errorcode>-1</errorcode> is returned, and
-+      <varname>errno</varname> is set to indicate the error.
-+      If the issued ioctl is illegal for the file descriptor used,
-+      <varname>errno</varname> will be set to <constant>ENOTTY</constant>.
-+    </para>
-+
-+    <refsect2>
-+      <title>
-+        <constant>KDBUS_CMD_FREE</constant> may fail with the following
-+        errors
-+      </title>
-+
-+      <variablelist>
-+        <varlistentry>
-+          <term><constant>ENXIO</constant></term>
-+          <listitem><para>
-+            No pool slice found at given offset.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EINVAL</constant></term>
-+          <listitem><para>
-+            Invalid flags provided.
-+          </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>EINVAL</constant></term>
-+          <listitem><para>
-+            The offset is valid, but the user is not allowed to free the slice.
-+            This happens, for example, if the offset was retrieved with
-+            <constant>KDBUS_RECV_PEEK</constant>.
-+          </para></listitem>
-+        </varlistentry>
-+      </variablelist>
-+    </refsect2>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>See Also</title>
-+    <simplelist type="inline">
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.bus</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.connection</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.endpoint</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.name</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>mmap</refentrytitle>
-+            <manvolnum>2</manvolnum>
-+          </citerefentry>
-+        </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>munmap</refentrytitle>
-+          <manvolnum>2</manvolnum>
-+        </citerefentry>
-+      </member>
-+    </simplelist>
-+  </refsect1>
-+</refentry>
-diff --git a/Documentation/kdbus/kdbus.xml b/Documentation/kdbus/kdbus.xml
-new file mode 100644
-index 0000000..d8e7400
---- /dev/null
-+++ b/Documentation/kdbus/kdbus.xml
-@@ -0,0 +1,1012 @@
-+<?xml version='1.0'?> <!--*-nxml-*-->
-+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
-+        "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
-+
-+<refentry id="kdbus">
-+
-+  <refentryinfo>
-+    <title>kdbus</title>
-+    <productname>kdbus</productname>
-+  </refentryinfo>
-+
-+  <refmeta>
-+    <refentrytitle>kdbus</refentrytitle>
-+    <manvolnum>7</manvolnum>
-+  </refmeta>
-+
-+  <refnamediv>
-+    <refname>kdbus</refname>
-+    <refpurpose>Kernel Message Bus</refpurpose>
-+  </refnamediv>
-+
-+  <refsect1>
-+    <title>Synopsis</title>
-+    <para>
-+      kdbus is an inter-process communication bus system controlled by the
-+      kernel. It provides user-space with an API to create buses and send
-+      unicast and multicast messages to one, or many, peers connected to the
-+      same bus. It does not enforce any layout on the transmitted data, but
-+      only provides the transport layer used for message interchange between
-+      peers.
-+    </para>
-+    <para>
-+      This set of man-pages gives a comprehensive overview of the kernel-level
-+      API, with all ioctl commands, associated structs and bit masks. However,
-+      most people will not use this API level directly, but rather let one of
-+      the high-level abstraction libraries help them integrate D-Bus
-+      functionality into their applications.
-+    </para>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Description</title>
-+    <para>
-+      kdbus provides a pseudo filesystem called <emphasis>kdbusfs</emphasis>,
-+      which is usually mounted on <filename>/sys/fs/kdbus</filename>. Bus
-+      primitives can be accessed as files and sub-directories underneath this
-+      mount-point. Any advanced operations are done via
-+      <function>ioctl()</function> on files created by
-+      <emphasis>kdbusfs</emphasis>. Multiple mount-points of
-+      <emphasis>kdbusfs</emphasis> are independent of each other. This allows
-+      namespacing of kdbus by mounting a new instance of
-+      <emphasis>kdbusfs</emphasis> in a new mount-namespace. kdbus calls these
-+      mount instances domains and each bus belongs to exactly one domain.
-+    </para>
-+
-+    <para>
-+      kdbus was designed as a transport layer for D-Bus, but is in no way
-+      limited, nor controlled by the D-Bus protocol specification. The D-Bus
-+      protocol is one possible application layer on top of kdbus.
-+    </para>
-+
-+    <para>
-+      For the general D-Bus protocol specification, its payload format, its
-+      marshaling, and its communication semantics, please refer to the
-+      <ulink url="http://dbus.freedesktop.org/doc/dbus-specification.html">
-+      D-Bus specification</ulink>.
-+    </para>
-+
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Terminology</title>
-+
-+    <refsect2>
-+      <title>Domain</title>
-+      <para>
-+        A domain is a <emphasis>kdbusfs</emphasis> mount-point containing all
-+        the bus primitives. Each domain is independent, and separate domains
-+        do not affect each other.
-+      </para>
-+    </refsect2>
-+
-+    <refsect2>
-+      <title>Bus</title>
-+      <para>
-+        A bus is a named object inside a domain. Clients exchange messages
-+        over a bus. Multiple buses themselves have no connection to each other;
-+        messages can only be exchanged on the same bus. The default endpoint of
-+        a bus, to which clients establish connections, is the "bus" file
-+        /sys/fs/kdbus/&lt;bus name&gt;/bus.
-+        Common operating system setups create one "system bus" per system,
-+        and one "user bus" for every logged-in user. Applications or services
-+        may create their own private buses. The kernel driver does not
-+        distinguish between different bus types, they are all handled the same
-+        way. See
-+        <citerefentry>
-+          <refentrytitle>kdbus.bus</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+        for more details.
-+      </para>
-+    </refsect2>
-+
-+    <refsect2>
-+      <title>Endpoint</title>
-+      <para>
-+        An endpoint provides a file to talk to a bus. Opening an endpoint
-+        creates a new connection to the bus to which the endpoint belongs. All
-+        endpoints have unique names and are accessible as files underneath the
-+        directory of a bus, e.g., /sys/fs/kdbus/&lt;bus&gt;/&lt;endpoint&gt;
-+        Every bus has a default endpoint called "bus".
-+        A bus can optionally offer additional endpoints with custom names
-+        to provide restricted access to the bus. Custom endpoints carry
-+        additional policy which can be used to create sandboxes with
-+        locked-down, limited, filtered access to a bus. See
-+        <citerefentry>
-+          <refentrytitle>kdbus.endpoint</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+        for more details.
-+      </para>
-+    </refsect2>
-+
-+    <refsect2>
-+      <title>Connection</title>
-+      <para>
-+        A connection to a bus is created by opening an endpoint file of a
-+        bus. Every ordinary client connection has a unique identifier on the
-+        bus and can address messages to every other connection on the same
-+        bus by using the peer's connection ID as the destination. See
-+        <citerefentry>
-+          <refentrytitle>kdbus.connection</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+        for more details.
-+      </para>
-+    </refsect2>
-+
-+    <refsect2>
-+      <title>Pool</title>
-+      <para>
-+        Each connection allocates a piece of shmem-backed memory that is
-+        used to receive messages and answers to ioctl commands from the kernel.
-+        It is never used to send anything to the kernel. In order to access that
-+        memory, an application must mmap() it into its address space. See
-+        <citerefentry>
-+          <refentrytitle>kdbus.pool</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+        for more details.
-+      </para>
-+    </refsect2>
-+
-+    <refsect2>
-+      <title>Well-known Name</title>
-+      <para>
-+        A connection can, in addition to its implicit unique connection ID,
-+        request the ownership of a textual well-known name. Well-known names are
-+        noted in reverse-domain notation, such as com.example.service1. A
-+        connection that offers a service on a bus is usually reached by its
-+        well-known name. An analogy of connection ID and well-known name is an
-+        IP address and a DNS name associated with that address. See
-+        <citerefentry>
-+          <refentrytitle>kdbus.name</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+        for more details.
-+      </para>
-+    </refsect2>
-+
-+    <refsect2>
-+      <title>Message</title>
-+      <para>
-+        Connections can exchange messages with other connections by addressing
-+        the peers with their connection ID or well-known name. A message
-+        consists of a message header with information on how to route the
-+        message, and the message payload, which is a logical byte stream of
-+        arbitrary size. Messages can carry additional file descriptors to be
-+        passed from one connection to another, just like passing file
-+        descriptors over UNIX domain sockets. Every connection can specify which
-+        set of metadata the kernel should attach to the message when it is
-+        delivered to the receiving connection. Metadata contains information
-+        like: system time stamps, UID, GID, TID, proc-starttime, well-known
-+        names, process comm, process exe, process argv, cgroup, capabilities,
-+        seclabel, audit session, loginuid and the connection's human-readable
-+        name. See
-+        <citerefentry>
-+          <refentrytitle>kdbus.message</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+        for more details.
-+      </para>
-+    </refsect2>
-+
-+    <refsect2>
-+      <title>Item</title>
-+      <para>
-+        The API of kdbus implements the notion of items, submitted through and
-+        returned by most ioctls, and stored inside data structures in the
-+        connection's pool. See
-+        <citerefentry>
-+          <refentrytitle>kdbus.item</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+        for more details.
-+      </para>
-+    </refsect2>
-+
-+    <refsect2>
-+      <title>Broadcast, signal, filter, match</title>
-+      <para>
-+        Signals are messages that a receiver opts in for by installing a blob of
-+        bytes, called a 'match'. Signal messages must always carry a
-+        counter-part blob, called a 'filter', and signals are only delivered to
-+        peers which have a match that white-lists the message's filter. Senders
-+        of signal messages can use either a single connection ID as receiver,
-+        or the special connection ID
-+        <constant>KDBUS_DST_ID_BROADCAST</constant> to potentially send it to
-+        all connections of a bus, following the logic described above. See
-+        <citerefentry>
-+          <refentrytitle>kdbus.match</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+        and
-+        <citerefentry>
-+          <refentrytitle>kdbus.message</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+        for more details.
-+      </para>
-+    </refsect2>
-+
-+    <refsect2>
-+      <title>Policy</title>
-+      <para>
-+        A policy is a set of rules that define which connections can see, talk
-+        to, or register a well-known name on the bus. A policy is attached to
-+        buses and custom endpoints, and modified by policy holder connections or
-+        owners of custom endpoints. See
-+        <citerefentry>
-+          <refentrytitle>kdbus.policy</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+        for more details.
-+      </para>
-+    </refsect2>
-+
-+    <refsect2>
-+      <title>Privileged bus users</title>
-+      <para>
-+        A user connecting to the bus is considered privileged if it is either
-+        the creator of the bus, or if it has the CAP_IPC_OWNER capability flag
-+        set. See
-+        <citerefentry>
-+          <refentrytitle>kdbus.connection</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+        for more details.
-+      </para>
-+    </refsect2>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Bus Layout</title>
-+
-+    <para>
-+      A <emphasis>bus</emphasis> provides and defines an environment that peers
-+      can connect to for message interchange. A bus is created via the kdbus
-+      control interface and can be modified by the bus creator. It applies the
-+      policy that control all bus operations. The bus creator itself does not
-+      participate as a peer. To establish a peer
-+      <emphasis>connection</emphasis>, you have to open one of the
-+      <emphasis>endpoints</emphasis> of a bus. Each bus provides a default
-+      endpoint, but further endpoints can be created on-demand. Endpoints are
-+      used to apply additional policies for all connections on this endpoint.
-+      Thus, they provide additional filters to further restrict access of
-+      specific connections to the bus.
-+    </para>
-+
-+    <para>
-+      Following, you can see an example bus layout:
-+    </para>
-+
-+    <programlisting><![CDATA[
-+                                  Bus Creator
-+                                       |
-+                                       |
-+                                    +-----+
-+                                    | Bus |
-+                                    +-----+
-+                                       |
-+                    __________________/ \__________________
-+                   /                                       \
-+                   |                                       |
-+             +----------+                             +----------+
-+             | Endpoint |                             | Endpoint |
-+             +----------+                             +----------+
-+         _________/|\_________                   _________/|\_________
-+        /          |          \                 /          |          \
-+        |          |          |                 |          |          |
-+        |          |          |                 |          |          |
-+   Connection  Connection  Connection      Connection  Connection  Connection
-+    ]]></programlisting>
-+
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Data structures and interconnections</title>
-+    <programlisting><![CDATA[
-+  +--------------------------------------------------------------------------+
-+  | Domain (Mount Point)                                                     |
-+  | /sys/fs/kdbus/control                                                    |
-+  | +----------------------------------------------------------------------+ |
-+  | | Bus (System Bus)                                                     | |
-+  | | /sys/fs/kdbus/0-system/                                              | |
-+  | | +-------------------------------+ +--------------------------------+ | |
-+  | | | Endpoint                      | | Endpoint                       | | |
-+  | | | /sys/fs/kdbus/0-system/bus    | | /sys/fs/kdbus/0-system/ep.app  | | |
-+  | | +-------------------------------+ +--------------------------------+ | |
-+  | | +--------------+ +--------------+ +--------------+ +---------------+ | |
-+  | | | Connection   | | Connection   | | Connection   | | Connection    | | |
-+  | | | :1.22        | | :1.25        | | :1.55        | | :1.81         | | |
-+  | | +--------------+ +--------------+ +--------------+ +---------------+ | |
-+  | +----------------------------------------------------------------------+ |
-+  |                                                                          |
-+  | +----------------------------------------------------------------------+ |
-+  | | Bus (User Bus for UID 2702)                                          | |
-+  | | /sys/fs/kdbus/2702-user/                                             | |
-+  | | +-------------------------------+ +--------------------------------+ | |
-+  | | | Endpoint                      | | Endpoint                       | | |
-+  | | | /sys/fs/kdbus/2702-user/bus   | | /sys/fs/kdbus/2702-user/ep.app | | |
-+  | | +-------------------------------+ +--------------------------------+ | |
-+  | | +--------------+ +--------------+ +--------------+ +---------------+ | |
-+  | | | Connection   | | Connection   | | Connection   | | Connection    | | |
-+  | | | :1.22        | | :1.25        | | :1.55        | | :1.81         | | |
-+  | | +--------------+ +--------------+ +--------------------------------+ | |
-+  | +----------------------------------------------------------------------+ |
-+  +--------------------------------------------------------------------------+
-+    ]]></programlisting>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>Metadata</title>
-+
-+    <refsect2>
-+      <title>When metadata is collected</title>
-+      <para>
-+        kdbus records data about the system in certain situations. Such metadata
-+        can refer to the currently active process (creds, PIDs, current user
-+        groups, process names and its executable path, cgroup membership,
-+        capabilities, security label and audit information), connection
-+        information (description string, currently owned names) and time stamps.
-+      </para>
-+      <para>
-+        Metadata is collected at the following times.
-+      </para>
-+
-+      <itemizedlist>
-+        <listitem><para>
-+          When a bus is created (<constant>KDBUS_CMD_MAKE</constant>),
-+          information about the calling task is collected. This data is returned
-+          by the kernel via the <constant>KDBUS_CMD_BUS_CREATOR_INFO</constant>
-+          call.
-+        </para></listitem>
-+
-+        <listitem>
-+          <para>
-+            When a connection is created (<constant>KDBUS_CMD_HELLO</constant>),
-+            information about the calling task is collected. Alternatively, a
-+            privileged connection may provide 'faked' information about
-+            credentials, PIDs and security labels which will be stored instead.
-+            This data is returned by the kernel as information on a connection
-+            (<constant>KDBUS_CMD_CONN_INFO</constant>). Only metadata that a
-+            connection allowed to be sent (by setting its bit in
-+            <varname>attach_flags_send</varname>) will be exported in this way.
-+          </para>
-+        </listitem>
-+
-+        <listitem>
-+          <para>
-+            When a message is sent (<constant>KDBUS_CMD_SEND</constant>),
-+            information about the sending task and the sending connection is
-+            collected. This metadata will be attached to the message when it
-+            arrives in the receiver's pool. If the connection sending the
-+            message installed faked credentials (see
-+            <citerefentry>
-+              <refentrytitle>kdbus.connection</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>),
-+            the message will not be augmented by any information about the
-+            currently sending task. Note that only metadata that was requested
-+            by the receiving connection will be collected and attached to
-+            messages.
-+          </para>
-+        </listitem>
-+      </itemizedlist>
-+
-+      <para>
-+        Which metadata items are actually delivered depends on the following
-+        sets and masks:
-+      </para>
-+
-+      <itemizedlist>
-+        <listitem><para>
-+          (a) the system-wide kmod creds mask
-+          (module parameter <varname>attach_flags_mask</varname>)
-+        </para></listitem>
-+
-+        <listitem><para>
-+          (b) the per-connection send creds mask, set by the connecting client
-+        </para></listitem>
-+
-+        <listitem><para>
-+          (c) the per-connection receive creds mask, set by the connecting
-+          client
-+        </para></listitem>
-+
-+        <listitem><para>
-+          (d) the per-bus minimal creds mask, set by the bus creator
-+        </para></listitem>
-+
-+        <listitem><para>
-+          (e) the per-bus owner creds mask, set by the bus creator
-+        </para></listitem>
-+
-+        <listitem><para>
-+          (f) the mask specified when querying creds of a bus peer
-+        </para></listitem>
-+
-+        <listitem><para>
-+          (g) the mask specified when querying creds of a bus owner
-+        </para></listitem>
-+      </itemizedlist>
-+
-+      <para>
-+        With the following rules:
-+      </para>
-+
-+      <itemizedlist>
-+        <listitem>
-+          <para>
-+            [1] The creds attached to messages are determined as
-+            <constant>a &amp; b &amp; c</constant>.
-+          </para>
-+        </listitem>
-+
-+        <listitem>
-+          <para>
-+            [2] When connecting to a bus (<constant>KDBUS_CMD_HELLO</constant>),
-+            and <constant>~b &amp; d != 0</constant>, the call will fail with,
-+            <errorcode>-1</errorcode>, and <varname>errno</varname> is set to
-+            <constant>ECONNREFUSED</constant>.
-+          </para>
-+        </listitem>
-+
-+        <listitem>
-+          <para>
-+            [3] When querying creds of a bus peer, the creds returned are
-+            <constant>a &amp; b &amp; f</constant>.
-+          </para>
-+        </listitem>
-+
-+        <listitem>
-+          <para>
-+            [4] When querying creds of a bus owner, the creds returned are
-+            <constant>a &amp; e &amp; g</constant>.
-+          </para>
-+        </listitem>
-+      </itemizedlist>
-+
-+      <para>
-+        Hence, programs might not always get all requested metadata items that
-+        it requested. Code must be written so that it can cope with this fact.
-+      </para>
-+    </refsect2>
-+
-+    <refsect2>
-+      <title>Benefits and heads-up</title>
-+      <para>
-+        Attaching metadata to messages has two major benefits.
-+
-+        <itemizedlist>
-+          <listitem>
-+            <para>
-+              Metadata attached to messages is gathered at the moment when the
-+              other side calls <constant>KDBUS_CMD_SEND</constant>, or,
-+              respectively, then the kernel notification is generated. There is
-+              no need for the receiving peer to retrieve information about the
-+              task in a second step. This closes a race gap that would otherwise
-+              be inherent.
-+            </para>
-+          </listitem>
-+          <listitem>
-+            <para>
-+              As metadata is delivered along with messages in the same data
-+              blob, no extra calls to kernel functions etc. are needed to gather
-+              them.
-+            </para>
-+          </listitem>
-+        </itemizedlist>
-+
-+        Note, however, that collecting metadata does come at a price for
-+        performance, so developers should carefully assess which metadata to
-+        really opt-in for. For best practice, data that is not needed as part
-+        of a message should not be requested by the connection in the first
-+        place (see <varname>attach_flags_recv</varname> in
-+        <constant>KDBUS_CMD_HELLO</constant>).
-+      </para>
-+    </refsect2>
-+
-+    <refsect2>
-+      <title>Attach flags for metadata items</title>
-+      <para>
-+        To let the kernel know which metadata information to attach as items
-+        to the aforementioned commands, it uses a bitmask. In those, the
-+        following <emphasis>attach flags</emphasis> are currently supported.
-+        Both the <varname>attach_flags_recv</varname> and
-+        <varname>attach_flags_send</varname> fields of
-+        <type>struct kdbus_cmd_hello</type>, as well as the payload of the
-+        <constant>KDBUS_ITEM_ATTACH_FLAGS_SEND</constant> and
-+        <constant>KDBUS_ITEM_ATTACH_FLAGS_RECV</constant> items follow this
-+        scheme.
-+      </para>
-+
-+      <variablelist>
-+        <varlistentry>
-+          <term><constant>KDBUS_ATTACH_TIMESTAMP</constant></term>
-+            <listitem><para>
-+              Requests the attachment of an item of type
-+              <constant>KDBUS_ITEM_TIMESTAMP</constant>.
-+            </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ATTACH_CREDS</constant></term>
-+            <listitem><para>
-+              Requests the attachment of an item of type
-+              <constant>KDBUS_ITEM_CREDS</constant>.
-+            </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ATTACH_PIDS</constant></term>
-+            <listitem><para>
-+              Requests the attachment of an item of type
-+              <constant>KDBUS_ITEM_PIDS</constant>.
-+            </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ATTACH_AUXGROUPS</constant></term>
-+            <listitem><para>
-+              Requests the attachment of an item of type
-+              <constant>KDBUS_ITEM_AUXGROUPS</constant>.
-+            </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ATTACH_NAMES</constant></term>
-+            <listitem><para>
-+              Requests the attachment of an item of type
-+              <constant>KDBUS_ITEM_OWNED_NAME</constant>.
-+            </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ATTACH_TID_COMM</constant></term>
-+            <listitem><para>
-+              Requests the attachment of an item of type
-+              <constant>KDBUS_ITEM_TID_COMM</constant>.
-+            </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ATTACH_PID_COMM</constant></term>
-+            <listitem><para>
-+              Requests the attachment of an item of type
-+              <constant>KDBUS_ITEM_PID_COMM</constant>.
-+            </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ATTACH_EXE</constant></term>
-+            <listitem><para>
-+              Requests the attachment of an item of type
-+              <constant>KDBUS_ITEM_EXE</constant>.
-+            </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ATTACH_CMDLINE</constant></term>
-+            <listitem><para>
-+              Requests the attachment of an item of type
-+              <constant>KDBUS_ITEM_CMDLINE</constant>.
-+            </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ATTACH_CGROUP</constant></term>
-+            <listitem><para>
-+              Requests the attachment of an item of type
-+              <constant>KDBUS_ITEM_CGROUP</constant>.
-+            </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ATTACH_CAPS</constant></term>
-+            <listitem><para>
-+              Requests the attachment of an item of type
-+              <constant>KDBUS_ITEM_CAPS</constant>.
-+            </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ATTACH_SECLABEL</constant></term>
-+            <listitem><para>
-+              Requests the attachment of an item of type
-+              <constant>KDBUS_ITEM_SECLABEL</constant>.
-+            </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ATTACH_AUDIT</constant></term>
-+            <listitem><para>
-+              Requests the attachment of an item of type
-+              <constant>KDBUS_ITEM_AUDIT</constant>.
-+            </para></listitem>
-+        </varlistentry>
-+
-+        <varlistentry>
-+          <term><constant>KDBUS_ATTACH_CONN_DESCRIPTION</constant></term>
-+            <listitem><para>
-+              Requests the attachment of an item of type
-+              <constant>KDBUS_ITEM_CONN_DESCRIPTION</constant>.
-+            </para></listitem>
-+        </varlistentry>
-+      </variablelist>
-+
-+      <para>
-+        Please refer to
-+        <citerefentry>
-+          <refentrytitle>kdbus.item</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+        for detailed information about the layout and payload of items and
-+        what metadata should be used to.
-+      </para>
-+    </refsect2>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>The ioctl interface</title>
-+
-+    <para>
-+      As stated in the 'synopsis' section above, application developers are
-+      strongly encouraged to use kdbus through one of the high-level D-Bus
-+      abstraction libraries, rather than using the low-level API directly.
-+    </para>
-+
-+    <para>
-+      kdbus on the kernel level exposes its functions exclusively through
-+      <citerefentry>
-+        <refentrytitle>ioctl</refentrytitle>
-+        <manvolnum>2</manvolnum>
-+      </citerefentry>,
-+      employed on file descriptors returned by
-+      <citerefentry>
-+        <refentrytitle>open</refentrytitle>
-+        <manvolnum>2</manvolnum>
-+      </citerefentry>
-+      on pseudo files exposed by
-+      <citerefentry>
-+        <refentrytitle>kdbus.fs</refentrytitle>
-+        <manvolnum>7</manvolnum>
-+      </citerefentry>.
-+    </para>
-+    <para>
-+      Following is a list of all the ioctls, along with the command structs
-+      they must be used with.
-+    </para>
-+
-+    <informaltable frame="none">
-+      <tgroup cols="3" colsep="1">
-+        <thead>
-+          <row>
-+            <entry>ioctl signature</entry>
-+            <entry>command</entry>
-+            <entry>transported struct</entry>
-+          </row>
-+        </thead>
-+        <tbody>
-+          <row>
-+            <entry><constant>0x40189500</constant></entry>
-+            <entry><constant>KDBUS_CMD_BUS_MAKE</constant></entry>
-+            <entry><type>struct kdbus_cmd *</type></entry>
-+          </row><row>
-+            <entry><constant>0x40189510</constant></entry>
-+            <entry><constant>KDBUS_CMD_ENDPOINT_MAKE</constant></entry>
-+            <entry><type>struct kdbus_cmd *</type></entry>
-+          </row><row>
-+            <entry><constant>0xc0609580</constant></entry>
-+            <entry><constant>KDBUS_CMD_HELLO</constant></entry>
-+            <entry><type>struct kdbus_cmd_hello *</type></entry>
-+          </row><row>
-+            <entry><constant>0x40189582</constant></entry>
-+            <entry><constant>KDBUS_CMD_BYEBYE</constant></entry>
-+            <entry><type>struct kdbus_cmd *</type></entry>
-+          </row><row>
-+            <entry><constant>0x40389590</constant></entry>
-+            <entry><constant>KDBUS_CMD_SEND</constant></entry>
-+            <entry><type>struct kdbus_cmd_send *</type></entry>
-+          </row><row>
-+            <entry><constant>0x80409591</constant></entry>
-+            <entry><constant>KDBUS_CMD_RECV</constant></entry>
-+            <entry><type>struct kdbus_cmd_recv *</type></entry>
-+          </row><row>
-+            <entry><constant>0x40209583</constant></entry>
-+            <entry><constant>KDBUS_CMD_FREE</constant></entry>
-+            <entry><type>struct kdbus_cmd_free *</type></entry>
-+          </row><row>
-+            <entry><constant>0x401895a0</constant></entry>
-+            <entry><constant>KDBUS_CMD_NAME_ACQUIRE</constant></entry>
-+            <entry><type>struct kdbus_cmd *</type></entry>
-+          </row><row>
-+            <entry><constant>0x401895a1</constant></entry>
-+            <entry><constant>KDBUS_CMD_NAME_RELEASE</constant></entry>
-+            <entry><type>struct kdbus_cmd *</type></entry>
-+          </row><row>
-+            <entry><constant>0x80289586</constant></entry>
-+            <entry><constant>KDBUS_CMD_LIST</constant></entry>
-+            <entry><type>struct kdbus_cmd_list *</type></entry>
-+          </row><row>
-+            <entry><constant>0x80309584</constant></entry>
-+            <entry><constant>KDBUS_CMD_CONN_INFO</constant></entry>
-+            <entry><type>struct kdbus_cmd_info *</type></entry>
-+          </row><row>
-+            <entry><constant>0x40209551</constant></entry>
-+            <entry><constant>KDBUS_CMD_UPDATE</constant></entry>
-+            <entry><type>struct kdbus_cmd *</type></entry>
-+          </row><row>
-+            <entry><constant>0x80309585</constant></entry>
-+            <entry><constant>KDBUS_CMD_BUS_CREATOR_INFO</constant></entry>
-+            <entry><type>struct kdbus_cmd_info *</type></entry>
-+          </row><row>
-+            <entry><constant>0x40189511</constant></entry>
-+            <entry><constant>KDBUS_CMD_ENDPOINT_UPDATE</constant></entry>
-+            <entry><type>struct kdbus_cmd *</type></entry>
-+          </row><row>
-+            <entry><constant>0x402095b0</constant></entry>
-+            <entry><constant>KDBUS_CMD_MATCH_ADD</constant></entry>
-+            <entry><type>struct kdbus_cmd_match *</type></entry>
-+          </row><row>
-+            <entry><constant>0x402095b1</constant></entry>
-+            <entry><constant>KDBUS_CMD_MATCH_REMOVE</constant></entry>
-+            <entry><type>struct kdbus_cmd_match *</type></entry>
-+          </row>
-+        </tbody>
-+      </tgroup>
-+    </informaltable>
-+
-+    <para>
-+      Depending on the type of <emphasis>kdbusfs</emphasis> node that was
-+      opened and what ioctls have been executed on a file descriptor before,
-+      a different sub-set of ioctl commands is allowed.
-+    </para>
-+
-+    <itemizedlist>
-+      <listitem>
-+        <para>
-+          On a file descriptor resulting from opening a
-+          <emphasis>control node</emphasis>, only the
-+          <constant>KDBUS_CMD_BUS_MAKE</constant> ioctl may be executed.
-+        </para>
-+      </listitem>
-+      <listitem>
-+        <para>
-+          On a file descriptor resulting from opening a
-+          <emphasis>bus endpoint node</emphasis>, only the
-+          <constant>KDBUS_CMD_ENDPOINT_MAKE</constant> and
-+          <constant>KDBUS_CMD_HELLO</constant> ioctls may be executed.
-+        </para>
-+      </listitem>
-+      <listitem>
-+        <para>
-+          A file descriptor that was used to create a bus
-+          (via <constant>KDBUS_CMD_BUS_MAKE</constant>) is called a
-+          <emphasis>bus owner</emphasis> file descriptor. The bus will be
-+          active as long as the file descriptor is kept open.
-+          A bus owner file descriptor can not be used to
-+          employ any further ioctls. As soon as
-+          <citerefentry>
-+            <refentrytitle>close</refentrytitle>
-+            <manvolnum>2</manvolnum>
-+          </citerefentry>
-+          is called on it, the bus will be shut down, along will all associated
-+          endpoints and connections. See
-+          <citerefentry>
-+            <refentrytitle>kdbus.bus</refentrytitle>
-+            <manvolnum>7</manvolnum>
-+          </citerefentry>
-+          for more details.
-+        </para>
-+      </listitem>
-+      <listitem>
-+        <para>
-+          A file descriptor that was used to create an endpoint
-+          (via <constant>KDBUS_CMD_ENDPOINT_MAKE</constant>) is called an
-+          <emphasis>endpoint owner</emphasis> file descriptor. The endpoint
-+          will be active as long as the file descriptor is kept open.
-+          An endpoint owner file descriptor can only be used
-+          to update details of an endpoint through the
-+          <constant>KDBUS_CMD_ENDPOINT_UPDATE</constant> ioctl. As soon as
-+          <citerefentry>
-+            <refentrytitle>close</refentrytitle>
-+            <manvolnum>2</manvolnum>
-+          </citerefentry>
-+          is called on it, the endpoint will be removed from the bus, and all
-+          connections that are connected to the bus through it are shut down.
-+          See
-+          <citerefentry>
-+            <refentrytitle>kdbus.endpoint</refentrytitle>
-+            <manvolnum>7</manvolnum>
-+          </citerefentry>
-+          for more details.
-+        </para>
-+      </listitem>
-+      <listitem>
-+        <para>
-+          A file descriptor that was used to create a connection
-+          (via <constant>KDBUS_CMD_HELLO</constant>) is called a
-+          <emphasis>connection owner</emphasis> file descriptor. The connection
-+          will be active as long as the file descriptor is kept open.
-+          A connection owner file descriptor may be used to
-+          issue any of the following ioctls.
-+        </para>
-+
-+        <itemizedlist>
-+          <listitem><para>
-+            <constant>KDBUS_CMD_UPDATE</constant> to tweak details of the
-+            connection. See
-+            <citerefentry>
-+              <refentrytitle>kdbus.connection</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>.
-+          </para></listitem>
-+
-+          <listitem><para>
-+            <constant>KDBUS_CMD_BYEBYE</constant> to shut down a connection
-+            without losing messages. See
-+            <citerefentry>
-+              <refentrytitle>kdbus.connection</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>.
-+          </para></listitem>
-+
-+          <listitem><para>
-+            <constant>KDBUS_CMD_FREE</constant> to free a slice of memory in
-+            the pool. See
-+            <citerefentry>
-+              <refentrytitle>kdbus.pool</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>.
-+          </para></listitem>
-+
-+          <listitem><para>
-+            <constant>KDBUS_CMD_CONN_INFO</constant> to retrieve information
-+            on other connections on the bus. See
-+            <citerefentry>
-+              <refentrytitle>kdbus.connection</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>.
-+          </para></listitem>
-+
-+          <listitem><para>
-+            <constant>KDBUS_CMD_BUS_CREATOR_INFO</constant> to retrieve
-+            information on the bus creator. See
-+            <citerefentry>
-+              <refentrytitle>kdbus.connection</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>.
-+          </para></listitem>
-+
-+          <listitem><para>
-+            <constant>KDBUS_CMD_LIST</constant> to retrieve a list of
-+            currently active well-known names and unique IDs on the bus. See
-+            <citerefentry>
-+              <refentrytitle>kdbus.name</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>.
-+          </para></listitem>
-+
-+          <listitem><para>
-+            <constant>KDBUS_CMD_SEND</constant> and
-+            <constant>KDBUS_CMD_RECV</constant> to send or receive a message.
-+            See
-+            <citerefentry>
-+              <refentrytitle>kdbus.message</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>.
-+          </para></listitem>
-+
-+          <listitem><para>
-+            <constant>KDBUS_CMD_NAME_ACQUIRE</constant> and
-+            <constant>KDBUS_CMD_NAME_RELEASE</constant> to acquire or release
-+            a well-known name on the bus. See
-+            <citerefentry>
-+              <refentrytitle>kdbus.name</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>.
-+          </para></listitem>
-+
-+          <listitem><para>
-+            <constant>KDBUS_CMD_MATCH_ADD</constant> and
-+            <constant>KDBUS_CMD_MATCH_REMOVE</constant> to add or remove
-+            a match for signal messages. See
-+            <citerefentry>
-+              <refentrytitle>kdbus.match</refentrytitle>
-+              <manvolnum>7</manvolnum>
-+            </citerefentry>.
-+          </para></listitem>
-+        </itemizedlist>
-+      </listitem>
-+    </itemizedlist>
-+
-+    <para>
-+      These ioctls, along with the structs they transport, are explained in
-+      detail in the other documents linked to in the "See Also" section below.
-+    </para>
-+  </refsect1>
-+
-+  <refsect1>
-+    <title>See Also</title>
-+    <simplelist type="inline">
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.bus</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.connection</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.endpoint</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.fs</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.item</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.message</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.name</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>kdbus.pool</refentrytitle>
-+          <manvolnum>7</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>ioctl</refentrytitle>
-+          <manvolnum>2</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>mmap</refentrytitle>
-+          <manvolnum>2</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>open</refentrytitle>
-+          <manvolnum>2</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <citerefentry>
-+          <refentrytitle>close</refentrytitle>
-+          <manvolnum>2</manvolnum>
-+        </citerefentry>
-+      </member>
-+      <member>
-+        <ulink url="http://freedesktop.org/wiki/Software/dbus">D-Bus</ulink>
-+      </member>
-+    </simplelist>
-+  </refsect1>
-+
-+</refentry>
-diff --git a/Documentation/kdbus/stylesheet.xsl b/Documentation/kdbus/stylesheet.xsl
-new file mode 100644
-index 0000000..52565ea
---- /dev/null
-+++ b/Documentation/kdbus/stylesheet.xsl
-@@ -0,0 +1,16 @@
-+<?xml version="1.0" encoding="UTF-8"?>
-+<stylesheet xmlns="http://www.w3.org/1999/XSL/Transform" version="1.0">
-+	<param name="chunk.quietly">1</param>
-+	<param name="funcsynopsis.style">ansi</param>
-+	<param name="funcsynopsis.tabular.threshold">80</param>
-+	<param name="callout.graphics">0</param>
-+	<param name="paper.type">A4</param>
-+	<param name="generate.section.toc.level">2</param>
-+	<param name="use.id.as.filename">1</param>
-+	<param name="citerefentry.link">1</param>
-+	<strip-space elements="*"/>
-+	<template name="generate.citerefentry.link">
-+		<value-of select="refentrytitle"/>
-+		<text>.html</text>
-+	</template>
-+</stylesheet>
-diff --git a/MAINTAINERS b/MAINTAINERS
-index d8afd29..02f7668 100644
---- a/MAINTAINERS
-+++ b/MAINTAINERS
-@@ -5585,6 +5585,19 @@ S:	Maintained
- F:	Documentation/kbuild/kconfig-language.txt
- F:	scripts/kconfig/
- 
-+KDBUS
-+M:	Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+M:	Daniel Mack <daniel@××××××.org>
-+M:	David Herrmann <dh.herrmann@××××××××××.com>
-+M:	Djalal Harouni <tixxdz@××××××.org>
-+L:	linux-kernel@×××××××××××.org
-+S:	Maintained
-+F:	ipc/kdbus/*
-+F:	samples/kdbus/*
-+F:	Documentation/kdbus/*
-+F:	include/uapi/linux/kdbus.h
-+F:	tools/testing/selftests/kdbus/
-+
- KDUMP
- M:	Vivek Goyal <vgoyal@××××××.com>
- M:	Haren Myneni <hbabu@××××××.com>
-diff --git a/Makefile b/Makefile
-index f5c8983..a1c8d57 100644
---- a/Makefile
-+++ b/Makefile
-@@ -1343,6 +1343,7 @@ $(help-board-dirs): help-%:
- %docs: scripts_basic FORCE
- 	$(Q)$(MAKE) $(build)=scripts build_docproc
- 	$(Q)$(MAKE) $(build)=Documentation/DocBook $@
-+	$(Q)$(MAKE) $(build)=Documentation/kdbus $@
- 
- else # KBUILD_EXTMOD
- 
-diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild
-index 1a0006a..4842a98 100644
---- a/include/uapi/linux/Kbuild
-+++ b/include/uapi/linux/Kbuild
-@@ -215,6 +215,7 @@ header-y += ixjuser.h
- header-y += jffs2.h
- header-y += joystick.h
- header-y += kcmp.h
-+header-y += kdbus.h
- header-y += kdev_t.h
- header-y += kd.h
- header-y += kernelcapi.h
-diff --git a/include/uapi/linux/kdbus.h b/include/uapi/linux/kdbus.h
-new file mode 100644
-index 0000000..4fc44cb
---- /dev/null
-+++ b/include/uapi/linux/kdbus.h
-@@ -0,0 +1,984 @@
-+/*
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#ifndef _UAPI_KDBUS_H_
-+#define _UAPI_KDBUS_H_
-+
-+#include <linux/ioctl.h>
-+#include <linux/types.h>
-+
-+#define KDBUS_IOCTL_MAGIC		0x95
-+#define KDBUS_SRC_ID_KERNEL		(0)
-+#define KDBUS_DST_ID_NAME		(0)
-+#define KDBUS_MATCH_ID_ANY		(~0ULL)
-+#define KDBUS_DST_ID_BROADCAST		(~0ULL)
-+#define KDBUS_FLAG_NEGOTIATE		(1ULL << 63)
-+
-+/**
-+ * struct kdbus_notify_id_change - name registry change message
-+ * @id:			New or former owner of the name
-+ * @flags:		flags field from KDBUS_HELLO_*
-+ *
-+ * Sent from kernel to userspace when the owner or activator of
-+ * a well-known name changes.
-+ *
-+ * Attached to:
-+ *   KDBUS_ITEM_ID_ADD
-+ *   KDBUS_ITEM_ID_REMOVE
-+ */
-+struct kdbus_notify_id_change {
-+	__u64 id;
-+	__u64 flags;
-+} __attribute__((__aligned__(8)));
-+
-+/**
-+ * struct kdbus_notify_name_change - name registry change message
-+ * @old_id:		ID and flags of former owner of a name
-+ * @new_id:		ID and flags of new owner of a name
-+ * @name:		Well-known name
-+ *
-+ * Sent from kernel to userspace when the owner or activator of
-+ * a well-known name changes.
-+ *
-+ * Attached to:
-+ *   KDBUS_ITEM_NAME_ADD
-+ *   KDBUS_ITEM_NAME_REMOVE
-+ *   KDBUS_ITEM_NAME_CHANGE
-+ */
-+struct kdbus_notify_name_change {
-+	struct kdbus_notify_id_change old_id;
-+	struct kdbus_notify_id_change new_id;
-+	char name[0];
-+} __attribute__((__aligned__(8)));
-+
-+/**
-+ * struct kdbus_creds - process credentials
-+ * @uid:		User ID
-+ * @euid:		Effective UID
-+ * @suid:		Saved UID
-+ * @fsuid:		Filesystem UID
-+ * @gid:		Group ID
-+ * @egid:		Effective GID
-+ * @sgid:		Saved GID
-+ * @fsgid:		Filesystem GID
-+ *
-+ * Attached to:
-+ *   KDBUS_ITEM_CREDS
-+ */
-+struct kdbus_creds {
-+	__u64 uid;
-+	__u64 euid;
-+	__u64 suid;
-+	__u64 fsuid;
-+	__u64 gid;
-+	__u64 egid;
-+	__u64 sgid;
-+	__u64 fsgid;
-+} __attribute__((__aligned__(8)));
-+
-+/**
-+ * struct kdbus_pids - process identifiers
-+ * @pid:		Process ID
-+ * @tid:		Thread ID
-+ * @ppid:		Parent process ID
-+ *
-+ * The PID and TID of a process.
-+ *
-+ * Attached to:
-+ *   KDBUS_ITEM_PIDS
-+ */
-+struct kdbus_pids {
-+	__u64 pid;
-+	__u64 tid;
-+	__u64 ppid;
-+} __attribute__((__aligned__(8)));
-+
-+/**
-+ * struct kdbus_caps - process capabilities
-+ * @last_cap:	Highest currently known capability bit
-+ * @caps:	Variable number of 32-bit capabilities flags
-+ *
-+ * Contains a variable number of 32-bit capabilities flags.
-+ *
-+ * Attached to:
-+ *   KDBUS_ITEM_CAPS
-+ */
-+struct kdbus_caps {
-+	__u32 last_cap;
-+	__u32 caps[0];
-+} __attribute__((__aligned__(8)));
-+
-+/**
-+ * struct kdbus_audit - audit information
-+ * @sessionid:		The audit session ID
-+ * @loginuid:		The audit login uid
-+ *
-+ * Attached to:
-+ *   KDBUS_ITEM_AUDIT
-+ */
-+struct kdbus_audit {
-+	__u32 sessionid;
-+	__u32 loginuid;
-+} __attribute__((__aligned__(8)));
-+
-+/**
-+ * struct kdbus_timestamp
-+ * @seqnum:		Global per-domain message sequence number
-+ * @monotonic_ns:	Monotonic timestamp, in nanoseconds
-+ * @realtime_ns:	Realtime timestamp, in nanoseconds
-+ *
-+ * Attached to:
-+ *   KDBUS_ITEM_TIMESTAMP
-+ */
-+struct kdbus_timestamp {
-+	__u64 seqnum;
-+	__u64 monotonic_ns;
-+	__u64 realtime_ns;
-+} __attribute__((__aligned__(8)));
-+
-+/**
-+ * struct kdbus_vec - I/O vector for kdbus payload items
-+ * @size:		The size of the vector
-+ * @address:		Memory address of data buffer
-+ * @offset:		Offset in the in-message payload memory,
-+ *			relative to the message head
-+ *
-+ * Attached to:
-+ *   KDBUS_ITEM_PAYLOAD_VEC, KDBUS_ITEM_PAYLOAD_OFF
-+ */
-+struct kdbus_vec {
-+	__u64 size;
-+	union {
-+		__u64 address;
-+		__u64 offset;
-+	};
-+} __attribute__((__aligned__(8)));
-+
-+/**
-+ * struct kdbus_bloom_parameter - bus-wide bloom parameters
-+ * @size:		Size of the bit field in bytes (m / 8)
-+ * @n_hash:		Number of hash functions used (k)
-+ */
-+struct kdbus_bloom_parameter {
-+	__u64 size;
-+	__u64 n_hash;
-+} __attribute__((__aligned__(8)));
-+
-+/**
-+ * struct kdbus_bloom_filter - bloom filter containing n elements
-+ * @generation:		Generation of the element set in the filter
-+ * @data:		Bit field, multiple of 8 bytes
-+ */
-+struct kdbus_bloom_filter {
-+	__u64 generation;
-+	__u64 data[0];
-+} __attribute__((__aligned__(8)));
-+
-+/**
-+ * struct kdbus_memfd - a kdbus memfd
-+ * @start:		The offset into the memfd where the segment starts
-+ * @size:		The size of the memfd segment
-+ * @fd:			The file descriptor number
-+ * @__pad:		Padding to ensure proper alignment and size
-+ *
-+ * Attached to:
-+ *   KDBUS_ITEM_PAYLOAD_MEMFD
-+ */
-+struct kdbus_memfd {
-+	__u64 start;
-+	__u64 size;
-+	int fd;
-+	__u32 __pad;
-+} __attribute__((__aligned__(8)));
-+
-+/**
-+ * struct kdbus_name - a registered well-known name with its flags
-+ * @flags:		Flags from KDBUS_NAME_*
-+ * @name:		Well-known name
-+ *
-+ * Attached to:
-+ *   KDBUS_ITEM_OWNED_NAME
-+ */
-+struct kdbus_name {
-+	__u64 flags;
-+	char name[0];
-+} __attribute__((__aligned__(8)));
-+
-+/**
-+ * enum kdbus_policy_access_type - permissions of a policy record
-+ * @_KDBUS_POLICY_ACCESS_NULL:	Uninitialized/invalid
-+ * @KDBUS_POLICY_ACCESS_USER:	Grant access to a uid
-+ * @KDBUS_POLICY_ACCESS_GROUP:	Grant access to gid
-+ * @KDBUS_POLICY_ACCESS_WORLD:	World-accessible
-+ */
-+enum kdbus_policy_access_type {
-+	_KDBUS_POLICY_ACCESS_NULL,
-+	KDBUS_POLICY_ACCESS_USER,
-+	KDBUS_POLICY_ACCESS_GROUP,
-+	KDBUS_POLICY_ACCESS_WORLD,
-+};
-+
-+/**
-+ * enum kdbus_policy_access_flags - mode flags
-+ * @KDBUS_POLICY_OWN:		Allow to own a well-known name
-+ *				Implies KDBUS_POLICY_TALK and KDBUS_POLICY_SEE
-+ * @KDBUS_POLICY_TALK:		Allow communication to a well-known name
-+ *				Implies KDBUS_POLICY_SEE
-+ * @KDBUS_POLICY_SEE:		Allow to see a well-known name
-+ */
-+enum kdbus_policy_type {
-+	KDBUS_POLICY_SEE	= 0,
-+	KDBUS_POLICY_TALK,
-+	KDBUS_POLICY_OWN,
-+};
-+
-+/**
-+ * struct kdbus_policy_access - policy access item
-+ * @type:		One of KDBUS_POLICY_ACCESS_* types
-+ * @access:		Access to grant
-+ * @id:			For KDBUS_POLICY_ACCESS_USER, the uid
-+ *			For KDBUS_POLICY_ACCESS_GROUP, the gid
-+ */
-+struct kdbus_policy_access {
-+	__u64 type;	/* USER, GROUP, WORLD */
-+	__u64 access;	/* OWN, TALK, SEE */
-+	__u64 id;	/* uid, gid, 0 */
-+} __attribute__((__aligned__(8)));
-+
-+/**
-+ * enum kdbus_attach_flags - flags for metadata attachments
-+ * @KDBUS_ATTACH_TIMESTAMP:		Timestamp
-+ * @KDBUS_ATTACH_CREDS:			Credentials
-+ * @KDBUS_ATTACH_PIDS:			PIDs
-+ * @KDBUS_ATTACH_AUXGROUPS:		Auxiliary groups
-+ * @KDBUS_ATTACH_NAMES:			Well-known names
-+ * @KDBUS_ATTACH_TID_COMM:		The "comm" process identifier of the TID
-+ * @KDBUS_ATTACH_PID_COMM:		The "comm" process identifier of the PID
-+ * @KDBUS_ATTACH_EXE:			The path of the executable
-+ * @KDBUS_ATTACH_CMDLINE:		The process command line
-+ * @KDBUS_ATTACH_CGROUP:		The croup membership
-+ * @KDBUS_ATTACH_CAPS:			The process capabilities
-+ * @KDBUS_ATTACH_SECLABEL:		The security label
-+ * @KDBUS_ATTACH_AUDIT:			The audit IDs
-+ * @KDBUS_ATTACH_CONN_DESCRIPTION:	The human-readable connection name
-+ * @_KDBUS_ATTACH_ALL:			All of the above
-+ * @_KDBUS_ATTACH_ANY:			Wildcard match to enable any kind of
-+ *					metatdata.
-+ */
-+enum kdbus_attach_flags {
-+	KDBUS_ATTACH_TIMESTAMP		=  1ULL <<  0,
-+	KDBUS_ATTACH_CREDS		=  1ULL <<  1,
-+	KDBUS_ATTACH_PIDS		=  1ULL <<  2,
-+	KDBUS_ATTACH_AUXGROUPS		=  1ULL <<  3,
-+	KDBUS_ATTACH_NAMES		=  1ULL <<  4,
-+	KDBUS_ATTACH_TID_COMM		=  1ULL <<  5,
-+	KDBUS_ATTACH_PID_COMM		=  1ULL <<  6,
-+	KDBUS_ATTACH_EXE		=  1ULL <<  7,
-+	KDBUS_ATTACH_CMDLINE		=  1ULL <<  8,
-+	KDBUS_ATTACH_CGROUP		=  1ULL <<  9,
-+	KDBUS_ATTACH_CAPS		=  1ULL << 10,
-+	KDBUS_ATTACH_SECLABEL		=  1ULL << 11,
-+	KDBUS_ATTACH_AUDIT		=  1ULL << 12,
-+	KDBUS_ATTACH_CONN_DESCRIPTION	=  1ULL << 13,
-+	_KDBUS_ATTACH_ALL		=  (1ULL << 14) - 1,
-+	_KDBUS_ATTACH_ANY		=  ~0ULL
-+};
-+
-+/**
-+ * enum kdbus_item_type - item types to chain data in a list
-+ * @_KDBUS_ITEM_NULL:			Uninitialized/invalid
-+ * @_KDBUS_ITEM_USER_BASE:		Start of user items
-+ * @KDBUS_ITEM_NEGOTIATE:		Negotiate supported items
-+ * @KDBUS_ITEM_PAYLOAD_VEC:		Vector to data
-+ * @KDBUS_ITEM_PAYLOAD_OFF:		Data at returned offset to message head
-+ * @KDBUS_ITEM_PAYLOAD_MEMFD:		Data as sealed memfd
-+ * @KDBUS_ITEM_FDS:			Attached file descriptors
-+ * @KDBUS_ITEM_CANCEL_FD:		FD used to cancel a synchronous
-+ *					operation by writing to it from
-+ *					userspace
-+ * @KDBUS_ITEM_BLOOM_PARAMETER:		Bus-wide bloom parameters, used with
-+ *					KDBUS_CMD_BUS_MAKE, carries a
-+ *					struct kdbus_bloom_parameter
-+ * @KDBUS_ITEM_BLOOM_FILTER:		Bloom filter carried with a message,
-+ *					used to match against a bloom mask of a
-+ *					connection, carries a struct
-+ *					kdbus_bloom_filter
-+ * @KDBUS_ITEM_BLOOM_MASK:		Bloom mask used to match against a
-+ *					message'sbloom filter
-+ * @KDBUS_ITEM_DST_NAME:		Destination's well-known name
-+ * @KDBUS_ITEM_MAKE_NAME:		Name of domain, bus, endpoint
-+ * @KDBUS_ITEM_ATTACH_FLAGS_SEND:	Attach-flags, used for updating which
-+ *					metadata a connection opts in to send
-+ * @KDBUS_ITEM_ATTACH_FLAGS_RECV:	Attach-flags, used for updating which
-+ *					metadata a connection requests to
-+ *					receive for each reeceived message
-+ * @KDBUS_ITEM_ID:			Connection ID
-+ * @KDBUS_ITEM_NAME:			Well-know name with flags
-+ * @_KDBUS_ITEM_ATTACH_BASE:		Start of metadata attach items
-+ * @KDBUS_ITEM_TIMESTAMP:		Timestamp
-+ * @KDBUS_ITEM_CREDS:			Process credentials
-+ * @KDBUS_ITEM_PIDS:			Process identifiers
-+ * @KDBUS_ITEM_AUXGROUPS:		Auxiliary process groups
-+ * @KDBUS_ITEM_OWNED_NAME:		A name owned by the associated
-+ *					connection
-+ * @KDBUS_ITEM_TID_COMM:		Thread ID "comm" identifier
-+ *					(Don't trust this, see below.)
-+ * @KDBUS_ITEM_PID_COMM:		Process ID "comm" identifier
-+ *					(Don't trust this, see below.)
-+ * @KDBUS_ITEM_EXE:			The path of the executable
-+ *					(Don't trust this, see below.)
-+ * @KDBUS_ITEM_CMDLINE:			The process command line
-+ *					(Don't trust this, see below.)
-+ * @KDBUS_ITEM_CGROUP:			The croup membership
-+ * @KDBUS_ITEM_CAPS:			The process capabilities
-+ * @KDBUS_ITEM_SECLABEL:		The security label
-+ * @KDBUS_ITEM_AUDIT:			The audit IDs
-+ * @KDBUS_ITEM_CONN_DESCRIPTION:	The connection's human-readable name
-+ *					(debugging)
-+ * @_KDBUS_ITEM_POLICY_BASE:		Start of policy items
-+ * @KDBUS_ITEM_POLICY_ACCESS:		Policy access block
-+ * @_KDBUS_ITEM_KERNEL_BASE:		Start of kernel-generated message items
-+ * @KDBUS_ITEM_NAME_ADD:		Notification in kdbus_notify_name_change
-+ * @KDBUS_ITEM_NAME_REMOVE:		Notification in kdbus_notify_name_change
-+ * @KDBUS_ITEM_NAME_CHANGE:		Notification in kdbus_notify_name_change
-+ * @KDBUS_ITEM_ID_ADD:			Notification in kdbus_notify_id_change
-+ * @KDBUS_ITEM_ID_REMOVE:		Notification in kdbus_notify_id_change
-+ * @KDBUS_ITEM_REPLY_TIMEOUT:		Timeout has been reached
-+ * @KDBUS_ITEM_REPLY_DEAD:		Destination died
-+ *
-+ * N.B: The process and thread COMM fields, as well as the CMDLINE and
-+ * EXE fields may be altered by unprivileged processes und should
-+ * hence *not* used for security decisions. Peers should make use of
-+ * these items only for informational purposes, such as generating log
-+ * records.
-+ */
-+enum kdbus_item_type {
-+	_KDBUS_ITEM_NULL,
-+	_KDBUS_ITEM_USER_BASE,
-+	KDBUS_ITEM_NEGOTIATE	= _KDBUS_ITEM_USER_BASE,
-+	KDBUS_ITEM_PAYLOAD_VEC,
-+	KDBUS_ITEM_PAYLOAD_OFF,
-+	KDBUS_ITEM_PAYLOAD_MEMFD,
-+	KDBUS_ITEM_FDS,
-+	KDBUS_ITEM_CANCEL_FD,
-+	KDBUS_ITEM_BLOOM_PARAMETER,
-+	KDBUS_ITEM_BLOOM_FILTER,
-+	KDBUS_ITEM_BLOOM_MASK,
-+	KDBUS_ITEM_DST_NAME,
-+	KDBUS_ITEM_MAKE_NAME,
-+	KDBUS_ITEM_ATTACH_FLAGS_SEND,
-+	KDBUS_ITEM_ATTACH_FLAGS_RECV,
-+	KDBUS_ITEM_ID,
-+	KDBUS_ITEM_NAME,
-+	KDBUS_ITEM_DST_ID,
-+
-+	/* keep these item types in sync with KDBUS_ATTACH_* flags */
-+	_KDBUS_ITEM_ATTACH_BASE	= 0x1000,
-+	KDBUS_ITEM_TIMESTAMP	= _KDBUS_ITEM_ATTACH_BASE,
-+	KDBUS_ITEM_CREDS,
-+	KDBUS_ITEM_PIDS,
-+	KDBUS_ITEM_AUXGROUPS,
-+	KDBUS_ITEM_OWNED_NAME,
-+	KDBUS_ITEM_TID_COMM,
-+	KDBUS_ITEM_PID_COMM,
-+	KDBUS_ITEM_EXE,
-+	KDBUS_ITEM_CMDLINE,
-+	KDBUS_ITEM_CGROUP,
-+	KDBUS_ITEM_CAPS,
-+	KDBUS_ITEM_SECLABEL,
-+	KDBUS_ITEM_AUDIT,
-+	KDBUS_ITEM_CONN_DESCRIPTION,
-+
-+	_KDBUS_ITEM_POLICY_BASE	= 0x2000,
-+	KDBUS_ITEM_POLICY_ACCESS = _KDBUS_ITEM_POLICY_BASE,
-+
-+	_KDBUS_ITEM_KERNEL_BASE	= 0x8000,
-+	KDBUS_ITEM_NAME_ADD	= _KDBUS_ITEM_KERNEL_BASE,
-+	KDBUS_ITEM_NAME_REMOVE,
-+	KDBUS_ITEM_NAME_CHANGE,
-+	KDBUS_ITEM_ID_ADD,
-+	KDBUS_ITEM_ID_REMOVE,
-+	KDBUS_ITEM_REPLY_TIMEOUT,
-+	KDBUS_ITEM_REPLY_DEAD,
-+};
-+
-+/**
-+ * struct kdbus_item - chain of data blocks
-+ * @size:		Overall data record size
-+ * @type:		Kdbus_item type of data
-+ * @data:		Generic bytes
-+ * @data32:		Generic 32 bit array
-+ * @data64:		Generic 64 bit array
-+ * @str:		Generic string
-+ * @id:			Connection ID
-+ * @vec:		KDBUS_ITEM_PAYLOAD_VEC
-+ * @creds:		KDBUS_ITEM_CREDS
-+ * @audit:		KDBUS_ITEM_AUDIT
-+ * @timestamp:		KDBUS_ITEM_TIMESTAMP
-+ * @name:		KDBUS_ITEM_NAME
-+ * @bloom_parameter:	KDBUS_ITEM_BLOOM_PARAMETER
-+ * @bloom_filter:	KDBUS_ITEM_BLOOM_FILTER
-+ * @memfd:		KDBUS_ITEM_PAYLOAD_MEMFD
-+ * @name_change:	KDBUS_ITEM_NAME_ADD
-+ *			KDBUS_ITEM_NAME_REMOVE
-+ *			KDBUS_ITEM_NAME_CHANGE
-+ * @id_change:		KDBUS_ITEM_ID_ADD
-+ *			KDBUS_ITEM_ID_REMOVE
-+ * @policy:		KDBUS_ITEM_POLICY_ACCESS
-+ */
-+struct kdbus_item {
-+	__u64 size;
-+	__u64 type;
-+	union {
-+		__u8 data[0];
-+		__u32 data32[0];
-+		__u64 data64[0];
-+		char str[0];
-+
-+		__u64 id;
-+		struct kdbus_vec vec;
-+		struct kdbus_creds creds;
-+		struct kdbus_pids pids;
-+		struct kdbus_audit audit;
-+		struct kdbus_caps caps;
-+		struct kdbus_timestamp timestamp;
-+		struct kdbus_name name;
-+		struct kdbus_bloom_parameter bloom_parameter;
-+		struct kdbus_bloom_filter bloom_filter;
-+		struct kdbus_memfd memfd;
-+		int fds[0];
-+		struct kdbus_notify_name_change name_change;
-+		struct kdbus_notify_id_change id_change;
-+		struct kdbus_policy_access policy_access;
-+	};
-+} __attribute__((__aligned__(8)));
-+
-+/**
-+ * enum kdbus_msg_flags - type of message
-+ * @KDBUS_MSG_EXPECT_REPLY:	Expect a reply message, used for
-+ *				method calls. The userspace-supplied
-+ *				cookie identifies the message and the
-+ *				respective reply carries the cookie
-+ *				in cookie_reply
-+ * @KDBUS_MSG_NO_AUTO_START:	Do not start a service if the addressed
-+ *				name is not currently active. This flag is
-+ *				not looked at by the kernel but only
-+ *				serves as hint for userspace implementations.
-+ * @KDBUS_MSG_SIGNAL:		Treat this message as signal
-+ */
-+enum kdbus_msg_flags {
-+	KDBUS_MSG_EXPECT_REPLY	= 1ULL << 0,
-+	KDBUS_MSG_NO_AUTO_START	= 1ULL << 1,
-+	KDBUS_MSG_SIGNAL	= 1ULL << 2,
-+};
-+
-+/**
-+ * enum kdbus_payload_type - type of payload carried by message
-+ * @KDBUS_PAYLOAD_KERNEL:	Kernel-generated simple message
-+ * @KDBUS_PAYLOAD_DBUS:		D-Bus marshalling "DBusDBus"
-+ *
-+ * Any payload-type is accepted. Common types will get added here once
-+ * established.
-+ */
-+enum kdbus_payload_type {
-+	KDBUS_PAYLOAD_KERNEL,
-+	KDBUS_PAYLOAD_DBUS	= 0x4442757344427573ULL,
-+};
-+
-+/**
-+ * struct kdbus_msg - the representation of a kdbus message
-+ * @size:		Total size of the message
-+ * @flags:		Message flags (KDBUS_MSG_*), userspace → kernel
-+ * @priority:		Message queue priority value
-+ * @dst_id:		64-bit ID of the destination connection
-+ * @src_id:		64-bit ID of the source connection
-+ * @payload_type:	Payload type (KDBUS_PAYLOAD_*)
-+ * @cookie:		Userspace-supplied cookie, for the connection
-+ *			to identify its messages
-+ * @timeout_ns:		The time to wait for a message reply from the peer.
-+ *			If there is no reply, and the send command is
-+ *			executed asynchronously, a kernel-generated message
-+ *			with an attached KDBUS_ITEM_REPLY_TIMEOUT item
-+ *			is sent to @src_id. For synchronously executed send
-+ *			command, the value denotes the maximum time the call
-+ *			blocks to wait for a reply. The timeout is expected in
-+ *			nanoseconds and as absolute CLOCK_MONOTONIC value.
-+ * @cookie_reply:	A reply to the requesting message with the same
-+ *			cookie. The requesting connection can match its
-+ *			request and the reply with this value
-+ * @items:		A list of kdbus_items containing the message payload
-+ */
-+struct kdbus_msg {
-+	__u64 size;
-+	__u64 flags;
-+	__s64 priority;
-+	__u64 dst_id;
-+	__u64 src_id;
-+	__u64 payload_type;
-+	__u64 cookie;
-+	union {
-+		__u64 timeout_ns;
-+		__u64 cookie_reply;
-+	};
-+	struct kdbus_item items[0];
-+} __attribute__((__aligned__(8)));
-+
-+/**
-+ * struct kdbus_msg_info - returned message container
-+ * @offset:		Offset of kdbus_msg slice in pool
-+ * @msg_size:		Copy of the kdbus_msg.size field
-+ * @return_flags:	Command return flags, kernel → userspace
-+ */
-+struct kdbus_msg_info {
-+	__u64 offset;
-+	__u64 msg_size;
-+	__u64 return_flags;
-+} __attribute__((__aligned__(8)));
-+
-+/**
-+ * enum kdbus_send_flags - flags for sending messages
-+ * @KDBUS_SEND_SYNC_REPLY:	Wait for destination connection to
-+ *				reply to this message. The
-+ *				KDBUS_CMD_SEND ioctl() will block
-+ *				until the reply is received, and
-+ *				reply in struct kdbus_cmd_send will
-+ *				yield the offset in the sender's pool
-+ *				where the reply can be found.
-+ *				This flag is only valid if
-+ *				@KDBUS_MSG_EXPECT_REPLY is set as well.
-+ */
-+enum kdbus_send_flags {
-+	KDBUS_SEND_SYNC_REPLY		= 1ULL << 0,
-+};
-+
-+/**
-+ * struct kdbus_cmd_send - send message
-+ * @size:		Overall size of this structure
-+ * @flags:		Flags to change send behavior (KDBUS_SEND_*)
-+ * @return_flags:	Command return flags, kernel → userspace
-+ * @msg_address:	Storage address of the kdbus_msg to send
-+ * @reply:		Storage for message reply if KDBUS_SEND_SYNC_REPLY
-+ *			was given
-+ * @items:		Additional items for this command
-+ */
-+struct kdbus_cmd_send {
-+	__u64 size;
-+	__u64 flags;
-+	__u64 return_flags;
-+	__u64 msg_address;
-+	struct kdbus_msg_info reply;
-+	struct kdbus_item items[0];
-+} __attribute__((__aligned__(8)));
-+
-+/**
-+ * enum kdbus_recv_flags - flags for de-queuing messages
-+ * @KDBUS_RECV_PEEK:		Return the next queued message without
-+ *				actually de-queuing it, and without installing
-+ *				any file descriptors or other resources. It is
-+ *				usually used to determine the activating
-+ *				connection of a bus name.
-+ * @KDBUS_RECV_DROP:		Drop and free the next queued message and all
-+ *				its resources without actually receiving it.
-+ * @KDBUS_RECV_USE_PRIORITY:	Only de-queue messages with the specified or
-+ *				higher priority (lowest values); if not set,
-+ *				the priority value is ignored.
-+ */
-+enum kdbus_recv_flags {
-+	KDBUS_RECV_PEEK		= 1ULL <<  0,
-+	KDBUS_RECV_DROP		= 1ULL <<  1,
-+	KDBUS_RECV_USE_PRIORITY	= 1ULL <<  2,
-+};
-+
-+/**
-+ * enum kdbus_recv_return_flags - return flags for message receive commands
-+ * @KDBUS_RECV_RETURN_INCOMPLETE_FDS:	One or more file descriptors could not
-+ *					be installed. These descriptors in
-+ *					KDBUS_ITEM_FDS will carry the value -1.
-+ * @KDBUS_RECV_RETURN_DROPPED_MSGS:	There have been dropped messages since
-+ *					the last time a message was received.
-+ *					The 'dropped_msgs' counter contains the
-+ *					number of messages dropped pool
-+ *					overflows or other missed broadcasts.
-+ */
-+enum kdbus_recv_return_flags {
-+	KDBUS_RECV_RETURN_INCOMPLETE_FDS	= 1ULL <<  0,
-+	KDBUS_RECV_RETURN_DROPPED_MSGS		= 1ULL <<  1,
-+};
-+
-+/**
-+ * struct kdbus_cmd_recv - struct to de-queue a buffered message
-+ * @size:		Overall size of this object
-+ * @flags:		KDBUS_RECV_* flags, userspace → kernel
-+ * @return_flags:	Command return flags, kernel → userspace
-+ * @priority:		Minimum priority of the messages to de-queue. Lowest
-+ *			values have the highest priority.
-+ * @dropped_msgs:	In case there were any dropped messages since the last
-+ *			time a message was received, this will be set to the
-+ *			number of lost messages and
-+ *			KDBUS_RECV_RETURN_DROPPED_MSGS will be set in
-+ *			'return_flags'. This can only happen if the ioctl
-+ *			returns 0 or EAGAIN.
-+ * @msg:		Return storage for received message.
-+ * @items:		Additional items for this command.
-+ *
-+ * This struct is used with the KDBUS_CMD_RECV ioctl.
-+ */
-+struct kdbus_cmd_recv {
-+	__u64 size;
-+	__u64 flags;
-+	__u64 return_flags;
-+	__s64 priority;
-+	__u64 dropped_msgs;
-+	struct kdbus_msg_info msg;
-+	struct kdbus_item items[0];
-+} __attribute__((__aligned__(8)));
-+
-+/**
-+ * struct kdbus_cmd_free - struct to free a slice of memory in the pool
-+ * @size:		Overall size of this structure
-+ * @flags:		Flags for the free command, userspace → kernel
-+ * @return_flags:	Command return flags, kernel → userspace
-+ * @offset:		The offset of the memory slice, as returned by other
-+ *			ioctls
-+ * @items:		Additional items to modify the behavior
-+ *
-+ * This struct is used with the KDBUS_CMD_FREE ioctl.
-+ */
-+struct kdbus_cmd_free {
-+	__u64 size;
-+	__u64 flags;
-+	__u64 return_flags;
-+	__u64 offset;
-+	struct kdbus_item items[0];
-+} __attribute__((__aligned__(8)));
-+
-+/**
-+ * enum kdbus_hello_flags - flags for struct kdbus_cmd_hello
-+ * @KDBUS_HELLO_ACCEPT_FD:	The connection allows the reception of
-+ *				any passed file descriptors
-+ * @KDBUS_HELLO_ACTIVATOR:	Special-purpose connection which registers
-+ *				a well-know name for a process to be started
-+ *				when traffic arrives
-+ * @KDBUS_HELLO_POLICY_HOLDER:	Special-purpose connection which registers
-+ *				policy entries for a name. The provided name
-+ *				is not activated and not registered with the
-+ *				name database, it only allows unprivileged
-+ *				connections to acquire a name, talk or discover
-+ *				a service
-+ * @KDBUS_HELLO_MONITOR:	Special-purpose connection to monitor
-+ *				bus traffic
-+ */
-+enum kdbus_hello_flags {
-+	KDBUS_HELLO_ACCEPT_FD		=  1ULL <<  0,
-+	KDBUS_HELLO_ACTIVATOR		=  1ULL <<  1,
-+	KDBUS_HELLO_POLICY_HOLDER	=  1ULL <<  2,
-+	KDBUS_HELLO_MONITOR		=  1ULL <<  3,
-+};
-+
-+/**
-+ * struct kdbus_cmd_hello - struct to say hello to kdbus
-+ * @size:		The total size of the structure
-+ * @flags:		Connection flags (KDBUS_HELLO_*), userspace → kernel
-+ * @return_flags:	Command return flags, kernel → userspace
-+ * @attach_flags_send:	Mask of metadata to attach to each message sent
-+ *			off by this connection (KDBUS_ATTACH_*)
-+ * @attach_flags_recv:	Mask of metadata to attach to each message receieved
-+ *			by the new connection (KDBUS_ATTACH_*)
-+ * @bus_flags:		The flags field copied verbatim from the original
-+ *			KDBUS_CMD_BUS_MAKE ioctl. It's intended to be useful
-+ *			to do negotiation of features of the payload that is
-+ *			transferred (kernel → userspace)
-+ * @id:			The ID of this connection (kernel → userspace)
-+ * @pool_size:		Size of the connection's buffer where the received
-+ *			messages are placed
-+ * @offset:		Pool offset where items are returned to report
-+ *			additional information about the bus and the newly
-+ *			created connection.
-+ * @items_size:		Size of buffer returned in the pool slice at @offset.
-+ * @id128:		Unique 128-bit ID of the bus (kernel → userspace)
-+ * @items:		A list of items
-+ *
-+ * This struct is used with the KDBUS_CMD_HELLO ioctl.
-+ */
-+struct kdbus_cmd_hello {
-+	__u64 size;
-+	__u64 flags;
-+	__u64 return_flags;
-+	__u64 attach_flags_send;
-+	__u64 attach_flags_recv;
-+	__u64 bus_flags;
-+	__u64 id;
-+	__u64 pool_size;
-+	__u64 offset;
-+	__u64 items_size;
-+	__u8 id128[16];
-+	struct kdbus_item items[0];
-+} __attribute__((__aligned__(8)));
-+
-+/**
-+ * struct kdbus_info - connection information
-+ * @size:		total size of the struct
-+ * @id:			64bit object ID
-+ * @flags:		object creation flags
-+ * @items:		list of items
-+ *
-+ * Note that the user is responsible for freeing the allocated memory with
-+ * the KDBUS_CMD_FREE ioctl.
-+ */
-+struct kdbus_info {
-+	__u64 size;
-+	__u64 id;
-+	__u64 flags;
-+	struct kdbus_item items[0];
-+} __attribute__((__aligned__(8)));
-+
-+/**
-+ * enum kdbus_list_flags - what to include into the returned list
-+ * @KDBUS_LIST_UNIQUE:		active connections
-+ * @KDBUS_LIST_ACTIVATORS:	activator connections
-+ * @KDBUS_LIST_NAMES:		known well-known names
-+ * @KDBUS_LIST_QUEUED:		queued-up names
-+ */
-+enum kdbus_list_flags {
-+	KDBUS_LIST_UNIQUE		= 1ULL <<  0,
-+	KDBUS_LIST_NAMES		= 1ULL <<  1,
-+	KDBUS_LIST_ACTIVATORS		= 1ULL <<  2,
-+	KDBUS_LIST_QUEUED		= 1ULL <<  3,
-+};
-+
-+/**
-+ * struct kdbus_cmd_list - list connections
-+ * @size:		overall size of this object
-+ * @flags:		flags for the query (KDBUS_LIST_*), userspace → kernel
-+ * @return_flags:	command return flags, kernel → userspace
-+ * @offset:		Offset in the caller's pool buffer where an array of
-+ *			kdbus_info objects is stored.
-+ *			The user must use KDBUS_CMD_FREE to free the
-+ *			allocated memory.
-+ * @list_size:		size of returned list in bytes
-+ * @items:		Items for the command. Reserved for future use.
-+ *
-+ * This structure is used with the KDBUS_CMD_LIST ioctl.
-+ */
-+struct kdbus_cmd_list {
-+	__u64 size;
-+	__u64 flags;
-+	__u64 return_flags;
-+	__u64 offset;
-+	__u64 list_size;
-+	struct kdbus_item items[0];
-+} __attribute__((__aligned__(8)));
-+
-+/**
-+ * struct kdbus_cmd_info - struct used for KDBUS_CMD_CONN_INFO ioctl
-+ * @size:		The total size of the struct
-+ * @flags:		Flags for this ioctl, userspace → kernel
-+ * @return_flags:	Command return flags, kernel → userspace
-+ * @id:			The 64-bit ID of the connection. If set to zero, passing
-+ *			@name is required. kdbus will look up the name to
-+ *			determine the ID in this case.
-+ * @attach_flags:	Set of attach flags to specify the set of information
-+ *			to receive, userspace → kernel
-+ * @offset:		Returned offset in the caller's pool buffer where the
-+ *			kdbus_info struct result is stored. The user must
-+ *			use KDBUS_CMD_FREE to free the allocated memory.
-+ * @info_size:		Output buffer to report size of data at @offset.
-+ * @items:		The optional item list, containing the
-+ *			well-known name to look up as a KDBUS_ITEM_NAME.
-+ *			Only needed in case @id is zero.
-+ *
-+ * On success, the KDBUS_CMD_CONN_INFO ioctl will return 0 and @offset will
-+ * tell the user the offset in the connection pool buffer at which to find the
-+ * result in a struct kdbus_info.
-+ */
-+struct kdbus_cmd_info {
-+	__u64 size;
-+	__u64 flags;
-+	__u64 return_flags;
-+	__u64 id;
-+	__u64 attach_flags;
-+	__u64 offset;
-+	__u64 info_size;
-+	struct kdbus_item items[0];
-+} __attribute__((__aligned__(8)));
-+
-+/**
-+ * enum kdbus_cmd_match_flags - flags to control the KDBUS_CMD_MATCH_ADD ioctl
-+ * @KDBUS_MATCH_REPLACE:	If entries with the supplied cookie already
-+ *				exists, remove them before installing the new
-+ *				matches.
-+ */
-+enum kdbus_cmd_match_flags {
-+	KDBUS_MATCH_REPLACE	= 1ULL <<  0,
-+};
-+
-+/**
-+ * struct kdbus_cmd_match - struct to add or remove matches
-+ * @size:		The total size of the struct
-+ * @flags:		Flags for match command (KDBUS_MATCH_*),
-+ *			userspace → kernel
-+ * @return_flags:	Command return flags, kernel → userspace
-+ * @cookie:		Userspace supplied cookie. When removing, the cookie
-+ *			identifies the match to remove
-+ * @items:		A list of items for additional information
-+ *
-+ * This structure is used with the KDBUS_CMD_MATCH_ADD and
-+ * KDBUS_CMD_MATCH_REMOVE ioctl.
-+ */
-+struct kdbus_cmd_match {
-+	__u64 size;
-+	__u64 flags;
-+	__u64 return_flags;
-+	__u64 cookie;
-+	struct kdbus_item items[0];
-+} __attribute__((__aligned__(8)));
-+
-+/**
-+ * enum kdbus_make_flags - Flags for KDBUS_CMD_{BUS,ENDPOINT}_MAKE
-+ * @KDBUS_MAKE_ACCESS_GROUP:	Make the bus or endpoint node group-accessible
-+ * @KDBUS_MAKE_ACCESS_WORLD:	Make the bus or endpoint node world-accessible
-+ */
-+enum kdbus_make_flags {
-+	KDBUS_MAKE_ACCESS_GROUP		= 1ULL <<  0,
-+	KDBUS_MAKE_ACCESS_WORLD		= 1ULL <<  1,
-+};
-+
-+/**
-+ * enum kdbus_name_flags - flags for KDBUS_CMD_NAME_ACQUIRE
-+ * @KDBUS_NAME_REPLACE_EXISTING:	Try to replace name of other connections
-+ * @KDBUS_NAME_ALLOW_REPLACEMENT:	Allow the replacement of the name
-+ * @KDBUS_NAME_QUEUE:			Name should be queued if busy
-+ * @KDBUS_NAME_IN_QUEUE:		Name is queued
-+ * @KDBUS_NAME_ACTIVATOR:		Name is owned by a activator connection
-+ * @KDBUS_NAME_PRIMARY:			Primary owner of the name
-+ * @KDBUS_NAME_ACQUIRED:		Name was acquired/queued _now_
-+ */
-+enum kdbus_name_flags {
-+	KDBUS_NAME_REPLACE_EXISTING	= 1ULL <<  0,
-+	KDBUS_NAME_ALLOW_REPLACEMENT	= 1ULL <<  1,
-+	KDBUS_NAME_QUEUE		= 1ULL <<  2,
-+	KDBUS_NAME_IN_QUEUE		= 1ULL <<  3,
-+	KDBUS_NAME_ACTIVATOR		= 1ULL <<  4,
-+	KDBUS_NAME_PRIMARY		= 1ULL <<  5,
-+	KDBUS_NAME_ACQUIRED		= 1ULL <<  6,
-+};
-+
-+/**
-+ * struct kdbus_cmd - generic ioctl payload
-+ * @size:		Overall size of this structure
-+ * @flags:		Flags for this ioctl, userspace → kernel
-+ * @return_flags:	Ioctl return flags, kernel → userspace
-+ * @items:		Additional items to modify the behavior
-+ *
-+ * This is a generic ioctl payload object. It's used by all ioctls that only
-+ * take flags and items as input.
-+ */
-+struct kdbus_cmd {
-+	__u64 size;
-+	__u64 flags;
-+	__u64 return_flags;
-+	struct kdbus_item items[0];
-+} __attribute__((__aligned__(8)));
-+
-+/**
-+ * Ioctl API
-+ *
-+ * KDBUS_CMD_BUS_MAKE:		After opening the "control" node, this command
-+ *				creates a new bus with the specified
-+ *				name. The bus is immediately shut down and
-+ *				cleaned up when the opened file descriptor is
-+ *				closed.
-+ *
-+ * KDBUS_CMD_ENDPOINT_MAKE:	Creates a new named special endpoint to talk to
-+ *				the bus. Such endpoints usually carry a more
-+ *				restrictive policy and grant restricted access
-+ *				to specific applications.
-+ * KDBUS_CMD_ENDPOINT_UPDATE:	Update the properties of a custom enpoint. Used
-+ *				to update the policy.
-+ *
-+ * KDBUS_CMD_HELLO:		By opening the bus node, a connection is
-+ *				created. After a HELLO the opened connection
-+ *				becomes an active peer on the bus.
-+ * KDBUS_CMD_UPDATE:		Update the properties of a connection. Used to
-+ *				update the metadata subscription mask and
-+ *				policy.
-+ * KDBUS_CMD_BYEBYE:		Disconnect a connection. If there are no
-+ *				messages queued up in the connection's pool,
-+ *				the call succeeds, and the handle is rendered
-+ *				unusable. Otherwise, -EBUSY is returned without
-+ *				any further side-effects.
-+ * KDBUS_CMD_FREE:		Release the allocated memory in the receiver's
-+ *				pool.
-+ * KDBUS_CMD_CONN_INFO:		Retrieve credentials and properties of the
-+ *				initial creator of the connection. The data was
-+ *				stored at registration time and does not
-+ *				necessarily represent the connected process or
-+ *				the actual state of the process.
-+ * KDBUS_CMD_BUS_CREATOR_INFO:	Retrieve information of the creator of the bus
-+ *				a connection is attached to.
-+ *
-+ * KDBUS_CMD_SEND:		Send a message and pass data from userspace to
-+ *				the kernel.
-+ * KDBUS_CMD_RECV:		Receive a message from the kernel which is
-+ *				placed in the receiver's pool.
-+ *
-+ * KDBUS_CMD_NAME_ACQUIRE:	Request a well-known bus name to associate with
-+ *				the connection. Well-known names are used to
-+ *				address a peer on the bus.
-+ * KDBUS_CMD_NAME_RELEASE:	Release a well-known name the connection
-+ *				currently owns.
-+ * KDBUS_CMD_LIST:		Retrieve the list of all currently registered
-+ *				well-known and unique names.
-+ *
-+ * KDBUS_CMD_MATCH_ADD:		Install a match which broadcast messages should
-+ *				be delivered to the connection.
-+ * KDBUS_CMD_MATCH_REMOVE:	Remove a current match for broadcast messages.
-+ */
-+enum kdbus_ioctl_type {
-+	/* bus owner (00-0f) */
-+	KDBUS_CMD_BUS_MAKE =		_IOW(KDBUS_IOCTL_MAGIC, 0x00,
-+					     struct kdbus_cmd),
-+
-+	/* endpoint owner (10-1f) */
-+	KDBUS_CMD_ENDPOINT_MAKE =	_IOW(KDBUS_IOCTL_MAGIC, 0x10,
-+					     struct kdbus_cmd),
-+	KDBUS_CMD_ENDPOINT_UPDATE =	_IOW(KDBUS_IOCTL_MAGIC, 0x11,
-+					     struct kdbus_cmd),
-+
-+	/* connection owner (80-ff) */
-+	KDBUS_CMD_HELLO =		_IOWR(KDBUS_IOCTL_MAGIC, 0x80,
-+					      struct kdbus_cmd_hello),
-+	KDBUS_CMD_UPDATE =		_IOW(KDBUS_IOCTL_MAGIC, 0x81,
-+					     struct kdbus_cmd),
-+	KDBUS_CMD_BYEBYE =		_IOW(KDBUS_IOCTL_MAGIC, 0x82,
-+					     struct kdbus_cmd),
-+	KDBUS_CMD_FREE =		_IOW(KDBUS_IOCTL_MAGIC, 0x83,
-+					     struct kdbus_cmd_free),
-+	KDBUS_CMD_CONN_INFO =		_IOR(KDBUS_IOCTL_MAGIC, 0x84,
-+					     struct kdbus_cmd_info),
-+	KDBUS_CMD_BUS_CREATOR_INFO =	_IOR(KDBUS_IOCTL_MAGIC, 0x85,
-+					     struct kdbus_cmd_info),
-+	KDBUS_CMD_LIST =		_IOR(KDBUS_IOCTL_MAGIC, 0x86,
-+					     struct kdbus_cmd_list),
-+
-+	KDBUS_CMD_SEND =		_IOW(KDBUS_IOCTL_MAGIC, 0x90,
-+					     struct kdbus_cmd_send),
-+	KDBUS_CMD_RECV =		_IOR(KDBUS_IOCTL_MAGIC, 0x91,
-+					     struct kdbus_cmd_recv),
-+
-+	KDBUS_CMD_NAME_ACQUIRE =	_IOW(KDBUS_IOCTL_MAGIC, 0xa0,
-+					     struct kdbus_cmd),
-+	KDBUS_CMD_NAME_RELEASE =	_IOW(KDBUS_IOCTL_MAGIC, 0xa1,
-+					     struct kdbus_cmd),
-+
-+	KDBUS_CMD_MATCH_ADD =		_IOW(KDBUS_IOCTL_MAGIC, 0xb0,
-+					     struct kdbus_cmd_match),
-+	KDBUS_CMD_MATCH_REMOVE =	_IOW(KDBUS_IOCTL_MAGIC, 0xb1,
-+					     struct kdbus_cmd_match),
-+};
-+
-+#endif /* _UAPI_KDBUS_H_ */
-diff --git a/include/uapi/linux/magic.h b/include/uapi/linux/magic.h
-index 7b1425a..ce2ac5a 100644
---- a/include/uapi/linux/magic.h
-+++ b/include/uapi/linux/magic.h
-@@ -76,4 +76,6 @@
- #define BTRFS_TEST_MAGIC	0x73727279
- #define NSFS_MAGIC		0x6e736673
- 
-+#define KDBUS_SUPER_MAGIC	0x44427573
-+
- #endif /* __LINUX_MAGIC_H__ */
-diff --git a/init/Kconfig b/init/Kconfig
-index dc24dec..9388071 100644
---- a/init/Kconfig
-+++ b/init/Kconfig
-@@ -261,6 +261,19 @@ config POSIX_MQUEUE_SYSCTL
- 	depends on SYSCTL
- 	default y
- 
-+config KDBUS
-+	tristate "kdbus interprocess communication"
-+	depends on TMPFS
-+	help
-+	  D-Bus is a system for low-latency, low-overhead, easy to use
-+	  interprocess communication (IPC).
-+
-+	  See the man-pages and HTML files in Documentation/kdbus/
-+	  that are generated by 'make mandocs' and 'make htmldocs'.
-+
-+	  If you have an ordinary machine, select M here. The module
-+	  will be called kdbus.
-+
- config CROSS_MEMORY_ATTACH
- 	bool "Enable process_vm_readv/writev syscalls"
- 	depends on MMU
-diff --git a/ipc/Makefile b/ipc/Makefile
-index 86c7300..68ec416 100644
---- a/ipc/Makefile
-+++ b/ipc/Makefile
-@@ -9,4 +9,4 @@ obj_mq-$(CONFIG_COMPAT) += compat_mq.o
- obj-$(CONFIG_POSIX_MQUEUE) += mqueue.o msgutil.o $(obj_mq-y)
- obj-$(CONFIG_IPC_NS) += namespace.o
- obj-$(CONFIG_POSIX_MQUEUE_SYSCTL) += mq_sysctl.o
--
-+obj-$(CONFIG_KDBUS) += kdbus/
-diff --git a/ipc/kdbus/Makefile b/ipc/kdbus/Makefile
-new file mode 100644
-index 0000000..66663a1
---- /dev/null
-+++ b/ipc/kdbus/Makefile
-@@ -0,0 +1,33 @@
-+#
-+# By setting KDBUS_EXT=2, the kdbus module will be built as kdbus2.ko, and
-+# KBUILD_MODNAME=kdbus2. This has the effect that all exported objects have
-+# different names than usually (kdbus2fs, /sys/fs/kdbus2/) and you can run
-+# your test-infrastructure against the kdbus2.ko, while running your system
-+# on kdbus.ko.
-+#
-+# To just build the module, use:
-+#     make KDBUS_EXT=2 M=ipc/kdbus
-+#
-+
-+kdbus$(KDBUS_EXT)-y := \
-+	bus.o \
-+	connection.o \
-+	endpoint.o \
-+	fs.o \
-+	handle.o \
-+	item.o \
-+	main.o \
-+	match.o \
-+	message.o \
-+	metadata.o \
-+	names.o \
-+	node.o \
-+	notify.o \
-+	domain.o \
-+	policy.o \
-+	pool.o \
-+	reply.o \
-+	queue.o \
-+	util.o
-+
-+obj-$(CONFIG_KDBUS) += kdbus$(KDBUS_EXT).o
-diff --git a/ipc/kdbus/bus.c b/ipc/kdbus/bus.c
-new file mode 100644
-index 0000000..a67f825
---- /dev/null
-+++ b/ipc/kdbus/bus.c
-@@ -0,0 +1,514 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ * Copyright (C) 2014-2015 Djalal Harouni
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#include <linux/fs.h>
-+#include <linux/hashtable.h>
-+#include <linux/init.h>
-+#include <linux/module.h>
-+#include <linux/random.h>
-+#include <linux/sched.h>
-+#include <linux/sizes.h>
-+#include <linux/slab.h>
-+#include <linux/uaccess.h>
-+#include <linux/uio.h>
-+
-+#include "bus.h"
-+#include "notify.h"
-+#include "connection.h"
-+#include "domain.h"
-+#include "endpoint.h"
-+#include "handle.h"
-+#include "item.h"
-+#include "match.h"
-+#include "message.h"
-+#include "metadata.h"
-+#include "names.h"
-+#include "policy.h"
-+#include "util.h"
-+
-+static void kdbus_bus_free(struct kdbus_node *node)
-+{
-+	struct kdbus_bus *bus = container_of(node, struct kdbus_bus, node);
-+
-+	WARN_ON(!list_empty(&bus->monitors_list));
-+	WARN_ON(!hash_empty(bus->conn_hash));
-+
-+	kdbus_notify_free(bus);
-+
-+	kdbus_user_unref(bus->creator);
-+	kdbus_name_registry_free(bus->name_registry);
-+	kdbus_domain_unref(bus->domain);
-+	kdbus_policy_db_clear(&bus->policy_db);
-+	kdbus_meta_proc_unref(bus->creator_meta);
-+	kfree(bus);
-+}
-+
-+static void kdbus_bus_release(struct kdbus_node *node, bool was_active)
-+{
-+	struct kdbus_bus *bus = container_of(node, struct kdbus_bus, node);
-+
-+	if (was_active)
-+		atomic_dec(&bus->creator->buses);
-+}
-+
-+static struct kdbus_bus *kdbus_bus_new(struct kdbus_domain *domain,
-+				       const char *name,
-+				       struct kdbus_bloom_parameter *bloom,
-+				       const u64 *pattach_owner,
-+				       u64 flags, kuid_t uid, kgid_t gid)
-+{
-+	struct kdbus_bus *b;
-+	u64 attach_owner;
-+	int ret;
-+
-+	if (bloom->size < 8 || bloom->size > KDBUS_BUS_BLOOM_MAX_SIZE ||
-+	    !KDBUS_IS_ALIGNED8(bloom->size) || bloom->n_hash < 1)
-+		return ERR_PTR(-EINVAL);
-+
-+	ret = kdbus_sanitize_attach_flags(pattach_owner ? *pattach_owner : 0,
-+					  &attach_owner);
-+	if (ret < 0)
-+		return ERR_PTR(ret);
-+
-+	ret = kdbus_verify_uid_prefix(name, domain->user_namespace, uid);
-+	if (ret < 0)
-+		return ERR_PTR(ret);
-+
-+	b = kzalloc(sizeof(*b), GFP_KERNEL);
-+	if (!b)
-+		return ERR_PTR(-ENOMEM);
-+
-+	kdbus_node_init(&b->node, KDBUS_NODE_BUS);
-+
-+	b->node.free_cb = kdbus_bus_free;
-+	b->node.release_cb = kdbus_bus_release;
-+	b->node.uid = uid;
-+	b->node.gid = gid;
-+	b->node.mode = S_IRUSR | S_IXUSR;
-+
-+	if (flags & (KDBUS_MAKE_ACCESS_GROUP | KDBUS_MAKE_ACCESS_WORLD))
-+		b->node.mode |= S_IRGRP | S_IXGRP;
-+	if (flags & KDBUS_MAKE_ACCESS_WORLD)
-+		b->node.mode |= S_IROTH | S_IXOTH;
-+
-+	b->id = atomic64_inc_return(&domain->last_id);
-+	b->bus_flags = flags;
-+	b->attach_flags_owner = attach_owner;
-+	generate_random_uuid(b->id128);
-+	b->bloom = *bloom;
-+	b->domain = kdbus_domain_ref(domain);
-+
-+	kdbus_policy_db_init(&b->policy_db);
-+
-+	init_rwsem(&b->conn_rwlock);
-+	hash_init(b->conn_hash);
-+	INIT_LIST_HEAD(&b->monitors_list);
-+
-+	INIT_LIST_HEAD(&b->notify_list);
-+	spin_lock_init(&b->notify_lock);
-+	mutex_init(&b->notify_flush_lock);
-+
-+	ret = kdbus_node_link(&b->node, &domain->node, name);
-+	if (ret < 0)
-+		goto exit_unref;
-+
-+	/* cache the metadata/credentials of the creator */
-+	b->creator_meta = kdbus_meta_proc_new();
-+	if (IS_ERR(b->creator_meta)) {
-+		ret = PTR_ERR(b->creator_meta);
-+		b->creator_meta = NULL;
-+		goto exit_unref;
-+	}
-+
-+	ret = kdbus_meta_proc_collect(b->creator_meta,
-+				      KDBUS_ATTACH_CREDS |
-+				      KDBUS_ATTACH_PIDS |
-+				      KDBUS_ATTACH_AUXGROUPS |
-+				      KDBUS_ATTACH_TID_COMM |
-+				      KDBUS_ATTACH_PID_COMM |
-+				      KDBUS_ATTACH_EXE |
-+				      KDBUS_ATTACH_CMDLINE |
-+				      KDBUS_ATTACH_CGROUP |
-+				      KDBUS_ATTACH_CAPS |
-+				      KDBUS_ATTACH_SECLABEL |
-+				      KDBUS_ATTACH_AUDIT);
-+	if (ret < 0)
-+		goto exit_unref;
-+
-+	b->name_registry = kdbus_name_registry_new();
-+	if (IS_ERR(b->name_registry)) {
-+		ret = PTR_ERR(b->name_registry);
-+		b->name_registry = NULL;
-+		goto exit_unref;
-+	}
-+
-+	/*
-+	 * Bus-limits of the creator are accounted on its real UID, just like
-+	 * all other per-user limits.
-+	 */
-+	b->creator = kdbus_user_lookup(domain, current_uid());
-+	if (IS_ERR(b->creator)) {
-+		ret = PTR_ERR(b->creator);
-+		b->creator = NULL;
-+		goto exit_unref;
-+	}
-+
-+	return b;
-+
-+exit_unref:
-+	kdbus_node_deactivate(&b->node);
-+	kdbus_node_unref(&b->node);
-+	return ERR_PTR(ret);
-+}
-+
-+/**
-+ * kdbus_bus_ref() - increase the reference counter of a kdbus_bus
-+ * @bus:		The bus to reference
-+ *
-+ * Every user of a bus, except for its creator, must add a reference to the
-+ * kdbus_bus using this function.
-+ *
-+ * Return: the bus itself
-+ */
-+struct kdbus_bus *kdbus_bus_ref(struct kdbus_bus *bus)
-+{
-+	if (bus)
-+		kdbus_node_ref(&bus->node);
-+	return bus;
-+}
-+
-+/**
-+ * kdbus_bus_unref() - decrease the reference counter of a kdbus_bus
-+ * @bus:		The bus to unref
-+ *
-+ * Release a reference. If the reference count drops to 0, the bus will be
-+ * freed.
-+ *
-+ * Return: NULL
-+ */
-+struct kdbus_bus *kdbus_bus_unref(struct kdbus_bus *bus)
-+{
-+	if (bus)
-+		kdbus_node_unref(&bus->node);
-+	return NULL;
-+}
-+
-+/**
-+ * kdbus_bus_find_conn_by_id() - find a connection with a given id
-+ * @bus:		The bus to look for the connection
-+ * @id:			The 64-bit connection id
-+ *
-+ * Looks up a connection with a given id. The returned connection
-+ * is ref'ed, and needs to be unref'ed by the user. Returns NULL if
-+ * the connection can't be found.
-+ */
-+struct kdbus_conn *kdbus_bus_find_conn_by_id(struct kdbus_bus *bus, u64 id)
-+{
-+	struct kdbus_conn *conn, *found = NULL;
-+
-+	down_read(&bus->conn_rwlock);
-+	hash_for_each_possible(bus->conn_hash, conn, hentry, id)
-+		if (conn->id == id) {
-+			found = kdbus_conn_ref(conn);
-+			break;
-+		}
-+	up_read(&bus->conn_rwlock);
-+
-+	return found;
-+}
-+
-+/**
-+ * kdbus_bus_broadcast() - send a message to all subscribed connections
-+ * @bus:	The bus the connections are connected to
-+ * @conn_src:	The source connection, may be %NULL for kernel notifications
-+ * @staging:	Staging object containing the message to send
-+ *
-+ * Send message to all connections that are currently active on the bus.
-+ * Connections must still have matches installed in order to let the message
-+ * pass.
-+ *
-+ * The caller must hold the name-registry lock of @bus.
-+ */
-+void kdbus_bus_broadcast(struct kdbus_bus *bus,
-+			 struct kdbus_conn *conn_src,
-+			 struct kdbus_staging *staging)
-+{
-+	struct kdbus_conn *conn_dst;
-+	unsigned int i;
-+	int ret;
-+
-+	lockdep_assert_held(&bus->name_registry->rwlock);
-+
-+	/*
-+	 * Make sure broadcast are queued on monitors before we send it out to
-+	 * anyone else. Otherwise, connections might react to broadcasts before
-+	 * the monitor gets the broadcast queued. In the worst case, the
-+	 * monitor sees a reaction to the broadcast before the broadcast itself.
-+	 * We don't give ordering guarantees across connections (and monitors
-+	 * can re-construct order via sequence numbers), but we should at least
-+	 * try to avoid re-ordering for monitors.
-+	 */
-+	kdbus_bus_eavesdrop(bus, conn_src, staging);
-+
-+	down_read(&bus->conn_rwlock);
-+	hash_for_each(bus->conn_hash, i, conn_dst, hentry) {
-+		if (!kdbus_conn_is_ordinary(conn_dst))
-+			continue;
-+
-+		/*
-+		 * Check if there is a match for the kmsg object in
-+		 * the destination connection match db
-+		 */
-+		if (!kdbus_match_db_match_msg(conn_dst->match_db, conn_src,
-+					      staging))
-+			continue;
-+
-+		if (conn_src) {
-+			/*
-+			 * Anyone can send broadcasts, as they have no
-+			 * destination. But a receiver needs TALK access to
-+			 * the sender in order to receive broadcasts.
-+			 */
-+			if (!kdbus_conn_policy_talk(conn_dst, NULL, conn_src))
-+				continue;
-+		} else {
-+			/*
-+			 * Check if there is a policy db that prevents the
-+			 * destination connection from receiving this kernel
-+			 * notification
-+			 */
-+			if (!kdbus_conn_policy_see_notification(conn_dst, NULL,
-+								staging->msg))
-+				continue;
-+		}
-+
-+		ret = kdbus_conn_entry_insert(conn_src, conn_dst, staging,
-+					      NULL, NULL);
-+		if (ret < 0)
-+			kdbus_conn_lost_message(conn_dst);
-+	}
-+	up_read(&bus->conn_rwlock);
-+}
-+
-+/**
-+ * kdbus_bus_eavesdrop() - send a message to all subscribed monitors
-+ * @bus:	The bus the monitors are connected to
-+ * @conn_src:	The source connection, may be %NULL for kernel notifications
-+ * @staging:	Staging object containing the message to send
-+ *
-+ * Send message to all monitors that are currently active on the bus. Monitors
-+ * must still have matches installed in order to let the message pass.
-+ *
-+ * The caller must hold the name-registry lock of @bus.
-+ */
-+void kdbus_bus_eavesdrop(struct kdbus_bus *bus,
-+			 struct kdbus_conn *conn_src,
-+			 struct kdbus_staging *staging)
-+{
-+	struct kdbus_conn *conn_dst;
-+	int ret;
-+
-+	/*
-+	 * Monitor connections get all messages; ignore possible errors
-+	 * when sending messages to monitor connections.
-+	 */
-+
-+	lockdep_assert_held(&bus->name_registry->rwlock);
-+
-+	down_read(&bus->conn_rwlock);
-+	list_for_each_entry(conn_dst, &bus->monitors_list, monitor_entry) {
-+		ret = kdbus_conn_entry_insert(conn_src, conn_dst, staging,
-+					      NULL, NULL);
-+		if (ret < 0)
-+			kdbus_conn_lost_message(conn_dst);
-+	}
-+	up_read(&bus->conn_rwlock);
-+}
-+
-+/**
-+ * kdbus_cmd_bus_make() - handle KDBUS_CMD_BUS_MAKE
-+ * @domain:		domain to operate on
-+ * @argp:		command payload
-+ *
-+ * Return: NULL or newly created bus on success, ERR_PTR on failure.
-+ */
-+struct kdbus_bus *kdbus_cmd_bus_make(struct kdbus_domain *domain,
-+				     void __user *argp)
-+{
-+	struct kdbus_bus *bus = NULL;
-+	struct kdbus_cmd *cmd;
-+	struct kdbus_ep *ep = NULL;
-+	int ret;
-+
-+	struct kdbus_arg argv[] = {
-+		{ .type = KDBUS_ITEM_NEGOTIATE },
-+		{ .type = KDBUS_ITEM_MAKE_NAME, .mandatory = true },
-+		{ .type = KDBUS_ITEM_BLOOM_PARAMETER, .mandatory = true },
-+		{ .type = KDBUS_ITEM_ATTACH_FLAGS_SEND },
-+	};
-+	struct kdbus_args args = {
-+		.allowed_flags = KDBUS_FLAG_NEGOTIATE |
-+				 KDBUS_MAKE_ACCESS_GROUP |
-+				 KDBUS_MAKE_ACCESS_WORLD,
-+		.argv = argv,
-+		.argc = ARRAY_SIZE(argv),
-+	};
-+
-+	ret = kdbus_args_parse(&args, argp, &cmd);
-+	if (ret < 0)
-+		return ERR_PTR(ret);
-+	if (ret > 0)
-+		return NULL;
-+
-+	bus = kdbus_bus_new(domain,
-+			    argv[1].item->str, &argv[2].item->bloom_parameter,
-+			    argv[3].item ? argv[3].item->data64 : NULL,
-+			    cmd->flags, current_euid(), current_egid());
-+	if (IS_ERR(bus)) {
-+		ret = PTR_ERR(bus);
-+		bus = NULL;
-+		goto exit;
-+	}
-+
-+	if (atomic_inc_return(&bus->creator->buses) > KDBUS_USER_MAX_BUSES) {
-+		atomic_dec(&bus->creator->buses);
-+		ret = -EMFILE;
-+		goto exit;
-+	}
-+
-+	if (!kdbus_node_activate(&bus->node)) {
-+		atomic_dec(&bus->creator->buses);
-+		ret = -ESHUTDOWN;
-+		goto exit;
-+	}
-+
-+	ep = kdbus_ep_new(bus, "bus", cmd->flags, bus->node.uid, bus->node.gid,
-+			  false);
-+	if (IS_ERR(ep)) {
-+		ret = PTR_ERR(ep);
-+		ep = NULL;
-+		goto exit;
-+	}
-+
-+	if (!kdbus_node_activate(&ep->node)) {
-+		ret = -ESHUTDOWN;
-+		goto exit;
-+	}
-+
-+	/*
-+	 * Drop our own reference, effectively causing the endpoint to be
-+	 * deactivated and released when the parent bus is.
-+	 */
-+	ep = kdbus_ep_unref(ep);
-+
-+exit:
-+	ret = kdbus_args_clear(&args, ret);
-+	if (ret < 0) {
-+		if (ep) {
-+			kdbus_node_deactivate(&ep->node);
-+			kdbus_ep_unref(ep);
-+		}
-+		if (bus) {
-+			kdbus_node_deactivate(&bus->node);
-+			kdbus_bus_unref(bus);
-+		}
-+		return ERR_PTR(ret);
-+	}
-+	return bus;
-+}
-+
-+/**
-+ * kdbus_cmd_bus_creator_info() - handle KDBUS_CMD_BUS_CREATOR_INFO
-+ * @conn:		connection to operate on
-+ * @argp:		command payload
-+ *
-+ * Return: >=0 on success, negative error code on failure.
-+ */
-+int kdbus_cmd_bus_creator_info(struct kdbus_conn *conn, void __user *argp)
-+{
-+	struct kdbus_cmd_info *cmd;
-+	struct kdbus_bus *bus = conn->ep->bus;
-+	struct kdbus_pool_slice *slice = NULL;
-+	struct kdbus_item *meta_items = NULL;
-+	struct kdbus_item_header item_hdr;
-+	struct kdbus_info info = {};
-+	size_t meta_size, name_len, cnt = 0;
-+	struct kvec kvec[6];
-+	u64 attach_flags, size = 0;
-+	int ret;
-+
-+	struct kdbus_arg argv[] = {
-+		{ .type = KDBUS_ITEM_NEGOTIATE },
-+	};
-+	struct kdbus_args args = {
-+		.allowed_flags = KDBUS_FLAG_NEGOTIATE,
-+		.argv = argv,
-+		.argc = ARRAY_SIZE(argv),
-+	};
-+
-+	ret = kdbus_args_parse(&args, argp, &cmd);
-+	if (ret != 0)
-+		return ret;
-+
-+	ret = kdbus_sanitize_attach_flags(cmd->attach_flags, &attach_flags);
-+	if (ret < 0)
-+		goto exit;
-+
-+	attach_flags &= bus->attach_flags_owner;
-+
-+	ret = kdbus_meta_emit(bus->creator_meta, NULL, NULL, conn,
-+			      attach_flags, &meta_items, &meta_size);
-+	if (ret < 0)
-+		goto exit;
-+
-+	name_len = strlen(bus->node.name) + 1;
-+	info.id = bus->id;
-+	info.flags = bus->bus_flags;
-+	item_hdr.type = KDBUS_ITEM_MAKE_NAME;
-+	item_hdr.size = KDBUS_ITEM_HEADER_SIZE + name_len;
-+
-+	kdbus_kvec_set(&kvec[cnt++], &info, sizeof(info), &size);
-+	kdbus_kvec_set(&kvec[cnt++], &item_hdr, sizeof(item_hdr), &size);
-+	kdbus_kvec_set(&kvec[cnt++], bus->node.name, name_len, &size);
-+	cnt += !!kdbus_kvec_pad(&kvec[cnt], &size);
-+	if (meta_size > 0) {
-+		kdbus_kvec_set(&kvec[cnt++], meta_items, meta_size, &size);
-+		cnt += !!kdbus_kvec_pad(&kvec[cnt], &size);
-+	}
-+
-+	info.size = size;
-+
-+	slice = kdbus_pool_slice_alloc(conn->pool, size, false);
-+	if (IS_ERR(slice)) {
-+		ret = PTR_ERR(slice);
-+		slice = NULL;
-+		goto exit;
-+	}
-+
-+	ret = kdbus_pool_slice_copy_kvec(slice, 0, kvec, cnt, size);
-+	if (ret < 0)
-+		goto exit;
-+
-+	kdbus_pool_slice_publish(slice, &cmd->offset, &cmd->info_size);
-+
-+	if (kdbus_member_set_user(&cmd->offset, argp, typeof(*cmd), offset) ||
-+	    kdbus_member_set_user(&cmd->info_size, argp,
-+				  typeof(*cmd), info_size))
-+		ret = -EFAULT;
-+
-+exit:
-+	kdbus_pool_slice_release(slice);
-+	kfree(meta_items);
-+	return kdbus_args_clear(&args, ret);
-+}
-diff --git a/ipc/kdbus/bus.h b/ipc/kdbus/bus.h
-new file mode 100644
-index 0000000..8c2acae
---- /dev/null
-+++ b/ipc/kdbus/bus.h
-@@ -0,0 +1,101 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ * Copyright (C) 2014-2015 Djalal Harouni <tixxdz@××××××.org>
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#ifndef __KDBUS_BUS_H
-+#define __KDBUS_BUS_H
-+
-+#include <linux/hashtable.h>
-+#include <linux/list.h>
-+#include <linux/mutex.h>
-+#include <linux/rwsem.h>
-+#include <linux/spinlock.h>
-+#include <uapi/linux/kdbus.h>
-+
-+#include "metadata.h"
-+#include "names.h"
-+#include "node.h"
-+#include "policy.h"
-+
-+struct kdbus_conn;
-+struct kdbus_domain;
-+struct kdbus_staging;
-+struct kdbus_user;
-+
-+/**
-+ * struct kdbus_bus - bus in a domain
-+ * @node:		kdbus_node
-+ * @id:			ID of this bus in the domain
-+ * @bus_flags:		Simple pass-through flags from userspace to userspace
-+ * @attach_flags_owner:	KDBUS_ATTACH_* flags of bus creator that other
-+ *			connections can see or query
-+ * @id128:		Unique random 128 bit ID of this bus
-+ * @bloom:		Bloom parameters
-+ * @domain:		Domain of this bus
-+ * @creator:		Creator of the bus
-+ * @creator_meta:	Meta information about the bus creator
-+ * @last_message_id:	Last used message id
-+ * @policy_db:		Policy database for this bus
-+ * @name_registry:	Name registry of this bus
-+ * @conn_rwlock:	Read/Write lock for all lists of child connections
-+ * @conn_hash:		Map of connection IDs
-+ * @monitors_list:	Connections that monitor this bus
-+ * @notify_list:	List of pending kernel-generated messages
-+ * @notify_lock:	Notification list lock
-+ * @notify_flush_lock:	Notification flushing lock
-+ */
-+struct kdbus_bus {
-+	struct kdbus_node node;
-+
-+	/* static */
-+	u64 id;
-+	u64 bus_flags;
-+	u64 attach_flags_owner;
-+	u8 id128[16];
-+	struct kdbus_bloom_parameter bloom;
-+	struct kdbus_domain *domain;
-+	struct kdbus_user *creator;
-+	struct kdbus_meta_proc *creator_meta;
-+
-+	/* protected by own locks */
-+	atomic64_t last_message_id;
-+	struct kdbus_policy_db policy_db;
-+	struct kdbus_name_registry *name_registry;
-+
-+	/* protected by conn_rwlock */
-+	struct rw_semaphore conn_rwlock;
-+	DECLARE_HASHTABLE(conn_hash, 8);
-+	struct list_head monitors_list;
-+
-+	/* protected by notify_lock */
-+	struct list_head notify_list;
-+	spinlock_t notify_lock;
-+	struct mutex notify_flush_lock;
-+};
-+
-+struct kdbus_bus *kdbus_bus_ref(struct kdbus_bus *bus);
-+struct kdbus_bus *kdbus_bus_unref(struct kdbus_bus *bus);
-+
-+struct kdbus_conn *kdbus_bus_find_conn_by_id(struct kdbus_bus *bus, u64 id);
-+void kdbus_bus_broadcast(struct kdbus_bus *bus,
-+			 struct kdbus_conn *conn_src,
-+			 struct kdbus_staging *staging);
-+void kdbus_bus_eavesdrop(struct kdbus_bus *bus,
-+			 struct kdbus_conn *conn_src,
-+			 struct kdbus_staging *staging);
-+
-+struct kdbus_bus *kdbus_cmd_bus_make(struct kdbus_domain *domain,
-+				     void __user *argp);
-+int kdbus_cmd_bus_creator_info(struct kdbus_conn *conn, void __user *argp);
-+
-+#endif
-diff --git a/ipc/kdbus/connection.c b/ipc/kdbus/connection.c
-new file mode 100644
-index 0000000..ef63d65
---- /dev/null
-+++ b/ipc/kdbus/connection.c
-@@ -0,0 +1,2227 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ * Copyright (C) 2014-2015 Djalal Harouni <tixxdz@××××××.org>
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#include <linux/audit.h>
-+#include <linux/file.h>
-+#include <linux/fs.h>
-+#include <linux/fs_struct.h>
-+#include <linux/hashtable.h>
-+#include <linux/idr.h>
-+#include <linux/init.h>
-+#include <linux/math64.h>
-+#include <linux/mm.h>
-+#include <linux/module.h>
-+#include <linux/mutex.h>
-+#include <linux/path.h>
-+#include <linux/poll.h>
-+#include <linux/sched.h>
-+#include <linux/shmem_fs.h>
-+#include <linux/sizes.h>
-+#include <linux/slab.h>
-+#include <linux/syscalls.h>
-+#include <linux/uio.h>
-+
-+#include "bus.h"
-+#include "connection.h"
-+#include "endpoint.h"
-+#include "handle.h"
-+#include "match.h"
-+#include "message.h"
-+#include "metadata.h"
-+#include "names.h"
-+#include "domain.h"
-+#include "item.h"
-+#include "notify.h"
-+#include "policy.h"
-+#include "pool.h"
-+#include "reply.h"
-+#include "util.h"
-+#include "queue.h"
-+
-+#define KDBUS_CONN_ACTIVE_BIAS	(INT_MIN + 2)
-+#define KDBUS_CONN_ACTIVE_NEW	(INT_MIN + 1)
-+
-+static struct kdbus_conn *kdbus_conn_new(struct kdbus_ep *ep,
-+					 struct file *file,
-+					 struct kdbus_cmd_hello *hello,
-+					 const char *name,
-+					 const struct kdbus_creds *creds,
-+					 const struct kdbus_pids *pids,
-+					 const char *seclabel,
-+					 const char *conn_description)
-+{
-+#ifdef CONFIG_DEBUG_LOCK_ALLOC
-+	static struct lock_class_key __key;
-+#endif
-+	struct kdbus_pool_slice *slice = NULL;
-+	struct kdbus_bus *bus = ep->bus;
-+	struct kdbus_conn *conn;
-+	u64 attach_flags_send;
-+	u64 attach_flags_recv;
-+	u64 items_size = 0;
-+	bool is_policy_holder;
-+	bool is_activator;
-+	bool is_monitor;
-+	bool privileged;
-+	bool owner;
-+	struct kvec kvec;
-+	int ret;
-+
-+	struct {
-+		u64 size;
-+		u64 type;
-+		struct kdbus_bloom_parameter bloom;
-+	} bloom_item;
-+
-+	privileged = kdbus_ep_is_privileged(ep, file);
-+	owner = kdbus_ep_is_owner(ep, file);
-+
-+	is_monitor = hello->flags & KDBUS_HELLO_MONITOR;
-+	is_activator = hello->flags & KDBUS_HELLO_ACTIVATOR;
-+	is_policy_holder = hello->flags & KDBUS_HELLO_POLICY_HOLDER;
-+
-+	if (!hello->pool_size || !IS_ALIGNED(hello->pool_size, PAGE_SIZE))
-+		return ERR_PTR(-EINVAL);
-+	if (is_monitor + is_activator + is_policy_holder > 1)
-+		return ERR_PTR(-EINVAL);
-+	if (name && !is_activator && !is_policy_holder)
-+		return ERR_PTR(-EINVAL);
-+	if (!name && (is_activator || is_policy_holder))
-+		return ERR_PTR(-EINVAL);
-+	if (name && !kdbus_name_is_valid(name, true))
-+		return ERR_PTR(-EINVAL);
-+	if (is_monitor && ep->user)
-+		return ERR_PTR(-EOPNOTSUPP);
-+	if (!owner && (is_activator || is_policy_holder || is_monitor))
-+		return ERR_PTR(-EPERM);
-+	if (!owner && (creds || pids || seclabel))
-+		return ERR_PTR(-EPERM);
-+
-+	ret = kdbus_sanitize_attach_flags(hello->attach_flags_send,
-+					  &attach_flags_send);
-+	if (ret < 0)
-+		return ERR_PTR(ret);
-+
-+	ret = kdbus_sanitize_attach_flags(hello->attach_flags_recv,
-+					  &attach_flags_recv);
-+	if (ret < 0)
-+		return ERR_PTR(ret);
-+
-+	conn = kzalloc(sizeof(*conn), GFP_KERNEL);
-+	if (!conn)
-+		return ERR_PTR(-ENOMEM);
-+
-+	kref_init(&conn->kref);
-+	atomic_set(&conn->active, KDBUS_CONN_ACTIVE_NEW);
-+#ifdef CONFIG_DEBUG_LOCK_ALLOC
-+	lockdep_init_map(&conn->dep_map, "s_active", &__key, 0);
-+#endif
-+	mutex_init(&conn->lock);
-+	INIT_LIST_HEAD(&conn->names_list);
-+	INIT_LIST_HEAD(&conn->reply_list);
-+	atomic_set(&conn->request_count, 0);
-+	atomic_set(&conn->lost_count, 0);
-+	INIT_DELAYED_WORK(&conn->work, kdbus_reply_list_scan_work);
-+	conn->cred = get_cred(file->f_cred);
-+	conn->pid = get_pid(task_pid(current));
-+	get_fs_root(current->fs, &conn->root_path);
-+	init_waitqueue_head(&conn->wait);
-+	kdbus_queue_init(&conn->queue);
-+	conn->privileged = privileged;
-+	conn->owner = owner;
-+	conn->ep = kdbus_ep_ref(ep);
-+	conn->id = atomic64_inc_return(&bus->domain->last_id);
-+	conn->flags = hello->flags;
-+	atomic64_set(&conn->attach_flags_send, attach_flags_send);
-+	atomic64_set(&conn->attach_flags_recv, attach_flags_recv);
-+	INIT_LIST_HEAD(&conn->monitor_entry);
-+
-+	if (conn_description) {
-+		conn->description = kstrdup(conn_description, GFP_KERNEL);
-+		if (!conn->description) {
-+			ret = -ENOMEM;
-+			goto exit_unref;
-+		}
-+	}
-+
-+	conn->pool = kdbus_pool_new(conn->description, hello->pool_size);
-+	if (IS_ERR(conn->pool)) {
-+		ret = PTR_ERR(conn->pool);
-+		conn->pool = NULL;
-+		goto exit_unref;
-+	}
-+
-+	conn->match_db = kdbus_match_db_new();
-+	if (IS_ERR(conn->match_db)) {
-+		ret = PTR_ERR(conn->match_db);
-+		conn->match_db = NULL;
-+		goto exit_unref;
-+	}
-+
-+	/* return properties of this connection to the caller */
-+	hello->bus_flags = bus->bus_flags;
-+	hello->id = conn->id;
-+
-+	BUILD_BUG_ON(sizeof(bus->id128) != sizeof(hello->id128));
-+	memcpy(hello->id128, bus->id128, sizeof(hello->id128));
-+
-+	/* privileged processes can impersonate somebody else */
-+	if (creds || pids || seclabel) {
-+		conn->meta_fake = kdbus_meta_fake_new();
-+		if (IS_ERR(conn->meta_fake)) {
-+			ret = PTR_ERR(conn->meta_fake);
-+			conn->meta_fake = NULL;
-+			goto exit_unref;
-+		}
-+
-+		ret = kdbus_meta_fake_collect(conn->meta_fake,
-+					      creds, pids, seclabel);
-+		if (ret < 0)
-+			goto exit_unref;
-+	} else {
-+		conn->meta_proc = kdbus_meta_proc_new();
-+		if (IS_ERR(conn->meta_proc)) {
-+			ret = PTR_ERR(conn->meta_proc);
-+			conn->meta_proc = NULL;
-+			goto exit_unref;
-+		}
-+
-+		ret = kdbus_meta_proc_collect(conn->meta_proc,
-+					      KDBUS_ATTACH_CREDS |
-+					      KDBUS_ATTACH_PIDS |
-+					      KDBUS_ATTACH_AUXGROUPS |
-+					      KDBUS_ATTACH_TID_COMM |
-+					      KDBUS_ATTACH_PID_COMM |
-+					      KDBUS_ATTACH_EXE |
-+					      KDBUS_ATTACH_CMDLINE |
-+					      KDBUS_ATTACH_CGROUP |
-+					      KDBUS_ATTACH_CAPS |
-+					      KDBUS_ATTACH_SECLABEL |
-+					      KDBUS_ATTACH_AUDIT);
-+		if (ret < 0)
-+			goto exit_unref;
-+	}
-+
-+	/*
-+	 * Account the connection against the current user (UID), or for
-+	 * custom endpoints use the anonymous user assigned to the endpoint.
-+	 * Note that limits are always accounted against the real UID, not
-+	 * the effective UID (cred->user always points to the accounting of
-+	 * cred->uid, not cred->euid).
-+	 * In case the caller is privileged, we allow changing the accounting
-+	 * to the faked user.
-+	 */
-+	if (ep->user) {
-+		conn->user = kdbus_user_ref(ep->user);
-+	} else {
-+		kuid_t uid;
-+
-+		if (conn->meta_fake && uid_valid(conn->meta_fake->uid) &&
-+		    conn->privileged)
-+			uid = conn->meta_fake->uid;
-+		else
-+			uid = conn->cred->uid;
-+
-+		conn->user = kdbus_user_lookup(ep->bus->domain, uid);
-+		if (IS_ERR(conn->user)) {
-+			ret = PTR_ERR(conn->user);
-+			conn->user = NULL;
-+			goto exit_unref;
-+		}
-+	}
-+
-+	if (atomic_inc_return(&conn->user->connections) > KDBUS_USER_MAX_CONN) {
-+		/* decremented by destructor as conn->user is valid */
-+		ret = -EMFILE;
-+		goto exit_unref;
-+	}
-+
-+	bloom_item.size = sizeof(bloom_item);
-+	bloom_item.type = KDBUS_ITEM_BLOOM_PARAMETER;
-+	bloom_item.bloom = bus->bloom;
-+	kdbus_kvec_set(&kvec, &bloom_item, bloom_item.size, &items_size);
-+
-+	slice = kdbus_pool_slice_alloc(conn->pool, items_size, false);
-+	if (IS_ERR(slice)) {
-+		ret = PTR_ERR(slice);
-+		slice = NULL;
-+		goto exit_unref;
-+	}
-+
-+	ret = kdbus_pool_slice_copy_kvec(slice, 0, &kvec, 1, items_size);
-+	if (ret < 0)
-+		goto exit_unref;
-+
-+	kdbus_pool_slice_publish(slice, &hello->offset, &hello->items_size);
-+	kdbus_pool_slice_release(slice);
-+
-+	return conn;
-+
-+exit_unref:
-+	kdbus_pool_slice_release(slice);
-+	kdbus_conn_unref(conn);
-+	return ERR_PTR(ret);
-+}
-+
-+static void __kdbus_conn_free(struct kref *kref)
-+{
-+	struct kdbus_conn *conn = container_of(kref, struct kdbus_conn, kref);
-+
-+	WARN_ON(kdbus_conn_active(conn));
-+	WARN_ON(delayed_work_pending(&conn->work));
-+	WARN_ON(!list_empty(&conn->queue.msg_list));
-+	WARN_ON(!list_empty(&conn->names_list));
-+	WARN_ON(!list_empty(&conn->reply_list));
-+
-+	if (conn->user) {
-+		atomic_dec(&conn->user->connections);
-+		kdbus_user_unref(conn->user);
-+	}
-+
-+	kdbus_meta_fake_free(conn->meta_fake);
-+	kdbus_meta_proc_unref(conn->meta_proc);
-+	kdbus_match_db_free(conn->match_db);
-+	kdbus_pool_free(conn->pool);
-+	kdbus_ep_unref(conn->ep);
-+	path_put(&conn->root_path);
-+	put_pid(conn->pid);
-+	put_cred(conn->cred);
-+	kfree(conn->description);
-+	kfree(conn->quota);
-+	kfree(conn);
-+}
-+
-+/**
-+ * kdbus_conn_ref() - take a connection reference
-+ * @conn:		Connection, may be %NULL
-+ *
-+ * Return: the connection itself
-+ */
-+struct kdbus_conn *kdbus_conn_ref(struct kdbus_conn *conn)
-+{
-+	if (conn)
-+		kref_get(&conn->kref);
-+	return conn;
-+}
-+
-+/**
-+ * kdbus_conn_unref() - drop a connection reference
-+ * @conn:		Connection (may be NULL)
-+ *
-+ * When the last reference is dropped, the connection's internal structure
-+ * is freed.
-+ *
-+ * Return: NULL
-+ */
-+struct kdbus_conn *kdbus_conn_unref(struct kdbus_conn *conn)
-+{
-+	if (conn)
-+		kref_put(&conn->kref, __kdbus_conn_free);
-+	return NULL;
-+}
-+
-+/**
-+ * kdbus_conn_active() - connection is not disconnected
-+ * @conn:		Connection to check
-+ *
-+ * Return true if the connection was not disconnected, yet. Note that a
-+ * connection might be disconnected asynchronously, unless you hold the
-+ * connection lock. If that's not suitable for you, see kdbus_conn_acquire() to
-+ * suppress connection shutdown for a short period.
-+ *
-+ * Return: true if the connection is still active
-+ */
-+bool kdbus_conn_active(const struct kdbus_conn *conn)
-+{
-+	return atomic_read(&conn->active) >= 0;
-+}
-+
-+/**
-+ * kdbus_conn_acquire() - acquire an active connection reference
-+ * @conn:		Connection
-+ *
-+ * Users can close a connection via KDBUS_BYEBYE (or by destroying the
-+ * endpoint/bus/...) at any time. Whenever this happens, we should deny any
-+ * user-visible action on this connection and signal ECONNRESET instead.
-+ * To avoid testing for connection availability everytime you take the
-+ * connection-lock, you can acquire a connection for short periods.
-+ *
-+ * By calling kdbus_conn_acquire(), you gain an "active reference" to the
-+ * connection. You must also hold a regular reference at any time! As long as
-+ * you hold the active-ref, the connection will not be shut down. However, if
-+ * the connection was shut down, you can never acquire an active-ref again.
-+ *
-+ * kdbus_conn_disconnect() disables the connection and then waits for all active
-+ * references to be dropped. It will also wake up any pending operation.
-+ * However, you must not sleep for an indefinite period while holding an
-+ * active-reference. Otherwise, kdbus_conn_disconnect() might stall. If you need
-+ * to sleep for an indefinite period, either release the reference and try to
-+ * acquire it again after waking up, or make kdbus_conn_disconnect() wake up
-+ * your wait-queue.
-+ *
-+ * Return: 0 on success, negative error code on failure.
-+ */
-+int kdbus_conn_acquire(struct kdbus_conn *conn)
-+{
-+	if (!atomic_inc_unless_negative(&conn->active))
-+		return -ECONNRESET;
-+
-+#ifdef CONFIG_DEBUG_LOCK_ALLOC
-+	rwsem_acquire_read(&conn->dep_map, 0, 1, _RET_IP_);
-+#endif
-+
-+	return 0;
-+}
-+
-+/**
-+ * kdbus_conn_release() - release an active connection reference
-+ * @conn:		Connection
-+ *
-+ * This releases an active reference that has been acquired via
-+ * kdbus_conn_acquire(). If the connection was already disabled and this is the
-+ * last active-ref that is dropped, the disconnect-waiter will be woken up and
-+ * properly close the connection.
-+ */
-+void kdbus_conn_release(struct kdbus_conn *conn)
-+{
-+	int v;
-+
-+	if (!conn)
-+		return;
-+
-+#ifdef CONFIG_DEBUG_LOCK_ALLOC
-+	rwsem_release(&conn->dep_map, 1, _RET_IP_);
-+#endif
-+
-+	v = atomic_dec_return(&conn->active);
-+	if (v != KDBUS_CONN_ACTIVE_BIAS)
-+		return;
-+
-+	wake_up_all(&conn->wait);
-+}
-+
-+static int kdbus_conn_connect(struct kdbus_conn *conn, const char *name)
-+{
-+	struct kdbus_ep *ep = conn->ep;
-+	struct kdbus_bus *bus = ep->bus;
-+	int ret;
-+
-+	if (WARN_ON(atomic_read(&conn->active) != KDBUS_CONN_ACTIVE_NEW))
-+		return -EALREADY;
-+
-+	/* make sure the ep-node is active while we add our connection */
-+	if (!kdbus_node_acquire(&ep->node))
-+		return -ESHUTDOWN;
-+
-+	/* lock order: domain -> bus -> ep -> names -> conn */
-+	mutex_lock(&ep->lock);
-+	down_write(&bus->conn_rwlock);
-+
-+	/* link into monitor list */
-+	if (kdbus_conn_is_monitor(conn))
-+		list_add_tail(&conn->monitor_entry, &bus->monitors_list);
-+
-+	/* link into bus and endpoint */
-+	list_add_tail(&conn->ep_entry, &ep->conn_list);
-+	hash_add(bus->conn_hash, &conn->hentry, conn->id);
-+
-+	/* enable lookups and acquire active ref */
-+	atomic_set(&conn->active, 1);
-+#ifdef CONFIG_DEBUG_LOCK_ALLOC
-+	rwsem_acquire_read(&conn->dep_map, 0, 1, _RET_IP_);
-+#endif
-+
-+	up_write(&bus->conn_rwlock);
-+	mutex_unlock(&ep->lock);
-+
-+	kdbus_node_release(&ep->node);
-+
-+	/*
-+	 * Notify subscribers about the new active connection, unless it is
-+	 * a monitor. Monitors are invisible on the bus, can't be addressed
-+	 * directly, and won't cause any notifications.
-+	 */
-+	if (!kdbus_conn_is_monitor(conn)) {
-+		ret = kdbus_notify_id_change(bus, KDBUS_ITEM_ID_ADD,
-+					     conn->id, conn->flags);
-+		if (ret < 0)
-+			goto exit_disconnect;
-+	}
-+
-+	if (kdbus_conn_is_activator(conn)) {
-+		u64 flags = KDBUS_NAME_ACTIVATOR;
-+
-+		if (WARN_ON(!name)) {
-+			ret = -EINVAL;
-+			goto exit_disconnect;
-+		}
-+
-+		ret = kdbus_name_acquire(bus->name_registry, conn, name,
-+					 flags, NULL);
-+		if (ret < 0)
-+			goto exit_disconnect;
-+	}
-+
-+	kdbus_conn_release(conn);
-+	kdbus_notify_flush(bus);
-+	return 0;
-+
-+exit_disconnect:
-+	kdbus_conn_release(conn);
-+	kdbus_conn_disconnect(conn, false);
-+	return ret;
-+}
-+
-+/**
-+ * kdbus_conn_disconnect() - disconnect a connection
-+ * @conn:		The connection to disconnect
-+ * @ensure_queue_empty:	Flag to indicate if the call should fail in
-+ *			case the connection's message list is not
-+ *			empty
-+ *
-+ * If @ensure_msg_list_empty is true, and the connection has pending messages,
-+ * -EBUSY is returned.
-+ *
-+ * Return: 0 on success, negative errno on failure
-+ */
-+int kdbus_conn_disconnect(struct kdbus_conn *conn, bool ensure_queue_empty)
-+{
-+	struct kdbus_queue_entry *entry, *tmp;
-+	struct kdbus_bus *bus = conn->ep->bus;
-+	struct kdbus_reply *r, *r_tmp;
-+	struct kdbus_conn *c;
-+	int i, v;
-+
-+	mutex_lock(&conn->lock);
-+	v = atomic_read(&conn->active);
-+	if (v == KDBUS_CONN_ACTIVE_NEW) {
-+		/* was never connected */
-+		mutex_unlock(&conn->lock);
-+		return 0;
-+	}
-+	if (v < 0) {
-+		/* already dead */
-+		mutex_unlock(&conn->lock);
-+		return -ECONNRESET;
-+	}
-+	if (ensure_queue_empty && !list_empty(&conn->queue.msg_list)) {
-+		/* still busy */
-+		mutex_unlock(&conn->lock);
-+		return -EBUSY;
-+	}
-+
-+	atomic_add(KDBUS_CONN_ACTIVE_BIAS, &conn->active);
-+	mutex_unlock(&conn->lock);
-+
-+	wake_up_interruptible(&conn->wait);
-+
-+#ifdef CONFIG_DEBUG_LOCK_ALLOC
-+	rwsem_acquire(&conn->dep_map, 0, 0, _RET_IP_);
-+	if (atomic_read(&conn->active) != KDBUS_CONN_ACTIVE_BIAS)
-+		lock_contended(&conn->dep_map, _RET_IP_);
-+#endif
-+
-+	wait_event(conn->wait,
-+		   atomic_read(&conn->active) == KDBUS_CONN_ACTIVE_BIAS);
-+
-+#ifdef CONFIG_DEBUG_LOCK_ALLOC
-+	lock_acquired(&conn->dep_map, _RET_IP_);
-+	rwsem_release(&conn->dep_map, 1, _RET_IP_);
-+#endif
-+
-+	cancel_delayed_work_sync(&conn->work);
-+	kdbus_policy_remove_owner(&conn->ep->bus->policy_db, conn);
-+
-+	/* lock order: domain -> bus -> ep -> names -> conn */
-+	mutex_lock(&conn->ep->lock);
-+	down_write(&bus->conn_rwlock);
-+
-+	/* remove from bus and endpoint */
-+	hash_del(&conn->hentry);
-+	list_del(&conn->monitor_entry);
-+	list_del(&conn->ep_entry);
-+
-+	up_write(&bus->conn_rwlock);
-+	mutex_unlock(&conn->ep->lock);
-+
-+	/*
-+	 * Remove all names associated with this connection; this possibly
-+	 * moves queued messages back to the activator connection.
-+	 */
-+	kdbus_name_release_all(bus->name_registry, conn);
-+
-+	/* if we die while other connections wait for our reply, notify them */
-+	mutex_lock(&conn->lock);
-+	list_for_each_entry_safe(entry, tmp, &conn->queue.msg_list, entry) {
-+		if (entry->reply)
-+			kdbus_notify_reply_dead(bus,
-+						entry->reply->reply_dst->id,
-+						entry->reply->cookie);
-+		kdbus_queue_entry_free(entry);
-+	}
-+
-+	list_for_each_entry_safe(r, r_tmp, &conn->reply_list, entry)
-+		kdbus_reply_unlink(r);
-+	mutex_unlock(&conn->lock);
-+
-+	/* lock order: domain -> bus -> ep -> names -> conn */
-+	down_read(&bus->conn_rwlock);
-+	hash_for_each(bus->conn_hash, i, c, hentry) {
-+		mutex_lock(&c->lock);
-+		list_for_each_entry_safe(r, r_tmp, &c->reply_list, entry) {
-+			if (r->reply_src != conn)
-+				continue;
-+
-+			if (r->sync)
-+				kdbus_sync_reply_wakeup(r, -EPIPE);
-+			else
-+				/* send a 'connection dead' notification */
-+				kdbus_notify_reply_dead(bus, c->id, r->cookie);
-+
-+			kdbus_reply_unlink(r);
-+		}
-+		mutex_unlock(&c->lock);
-+	}
-+	up_read(&bus->conn_rwlock);
-+
-+	if (!kdbus_conn_is_monitor(conn))
-+		kdbus_notify_id_change(bus, KDBUS_ITEM_ID_REMOVE,
-+				       conn->id, conn->flags);
-+
-+	kdbus_notify_flush(bus);
-+
-+	return 0;
-+}
-+
-+/**
-+ * kdbus_conn_has_name() - check if a connection owns a name
-+ * @conn:		Connection
-+ * @name:		Well-know name to check for
-+ *
-+ * The caller must hold the registry lock of conn->ep->bus.
-+ *
-+ * Return: true if the name is currently owned by the connection
-+ */
-+bool kdbus_conn_has_name(struct kdbus_conn *conn, const char *name)
-+{
-+	struct kdbus_name_owner *owner;
-+
-+	lockdep_assert_held(&conn->ep->bus->name_registry->rwlock);
-+
-+	list_for_each_entry(owner, &conn->names_list, conn_entry)
-+		if (!(owner->flags & KDBUS_NAME_IN_QUEUE) &&
-+		    !strcmp(name, owner->name->name))
-+			return true;
-+
-+	return false;
-+}
-+
-+struct kdbus_quota {
-+	u32 memory;
-+	u16 msgs;
-+	u8 fds;
-+};
-+
-+/**
-+ * kdbus_conn_quota_inc() - increase quota accounting
-+ * @c:		connection owning the quota tracking
-+ * @u:		user to account for (or NULL for kernel accounting)
-+ * @memory:	size of memory to account for
-+ * @fds:	number of FDs to account for
-+ *
-+ * This call manages the quotas on resource @c. That is, it's used if other
-+ * users want to use the resources of connection @c, which so far only concerns
-+ * the receive queue of the destination.
-+ *
-+ * This increases the quota-accounting for user @u by @memory bytes and @fds
-+ * file descriptors. If the user has already reached the quota limits, this call
-+ * will not do any accounting but return a negative error code indicating the
-+ * failure.
-+ *
-+ * Return: 0 on success, negative error code on failure.
-+ */
-+int kdbus_conn_quota_inc(struct kdbus_conn *c, struct kdbus_user *u,
-+			 size_t memory, size_t fds)
-+{
-+	struct kdbus_quota *quota;
-+	size_t available, accounted;
-+	unsigned int id;
-+
-+	/*
-+	 * Pool Layout:
-+	 * 50% of a pool is always owned by the connection. It is reserved for
-+	 * kernel queries, handling received messages and other tasks that are
-+	 * under control of the pool owner. The other 50% of the pool are used
-+	 * as incoming queue.
-+	 * As we optionally support user-space based policies, we need fair
-+	 * allocation schemes. Furthermore, resource utilization should be
-+	 * maximized, so only minimal resources stay reserved. However, we need
-+	 * to adapt to a dynamic number of users, as we cannot know how many
-+	 * users will talk to a connection. Therefore, the current allocation
-+	 * works like this:
-+	 * We limit the number of bytes in a destination's pool per sending
-+	 * user. The space available for a user is 33% of the unused pool space
-+	 * (whereas the space used by the user itself is also treated as
-+	 * 'unused'). This way, we favor users coming first, but keep enough
-+	 * pool space available for any following users. Given that messages are
-+	 * dequeued in FIFO order, this should balance nicely if the number of
-+	 * users grows. At the same time, this algorithm guarantees that the
-+	 * space available to a connection is reduced dynamically, the more
-+	 * concurrent users talk to a connection.
-+	 */
-+
-+	/* per user-accounting is expensive, so we keep state small */
-+	BUILD_BUG_ON(sizeof(quota->memory) != 4);
-+	BUILD_BUG_ON(sizeof(quota->msgs) != 2);
-+	BUILD_BUG_ON(sizeof(quota->fds) != 1);
-+	BUILD_BUG_ON(KDBUS_CONN_MAX_MSGS > U16_MAX);
-+	BUILD_BUG_ON(KDBUS_CONN_MAX_FDS_PER_USER > U8_MAX);
-+
-+	id = u ? u->id : KDBUS_USER_KERNEL_ID;
-+	if (id >= c->n_quota) {
-+		unsigned int users;
-+
-+		users = max(KDBUS_ALIGN8(id) + 8, id);
-+		quota = krealloc(c->quota, users * sizeof(*quota),
-+				 GFP_KERNEL | __GFP_ZERO);
-+		if (!quota)
-+			return -ENOMEM;
-+
-+		c->n_quota = users;
-+		c->quota = quota;
-+	}
-+
-+	quota = &c->quota[id];
-+	kdbus_pool_accounted(c->pool, &available, &accounted);
-+
-+	/* half the pool is _always_ reserved for the pool owner */
-+	available /= 2;
-+
-+	/*
-+	 * Pool owner slices are un-accounted slices; they can claim more
-+	 * than 50% of the queue. However, the slices we're dealing with here
-+	 * belong to the incoming queue, hence they are 'accounted' slices
-+	 * to which the 50%-limit applies.
-+	 */
-+	if (available < accounted)
-+		return -ENOBUFS;
-+
-+	/* 1/3 of the remaining space (including your own memory) */
-+	available = (available - accounted + quota->memory) / 3;
-+
-+	if (available < quota->memory ||
-+	    available - quota->memory < memory ||
-+	    quota->memory + memory > U32_MAX)
-+		return -ENOBUFS;
-+	if (quota->msgs >= KDBUS_CONN_MAX_MSGS)
-+		return -ENOBUFS;
-+	if (quota->fds + fds < quota->fds ||
-+	    quota->fds + fds > KDBUS_CONN_MAX_FDS_PER_USER)
-+		return -EMFILE;
-+
-+	quota->memory += memory;
-+	quota->fds += fds;
-+	++quota->msgs;
-+	return 0;
-+}
-+
-+/**
-+ * kdbus_conn_quota_dec() - decrease quota accounting
-+ * @c:		connection owning the quota tracking
-+ * @u:		user which was accounted for (or NULL for kernel accounting)
-+ * @memory:	size of memory which was accounted for
-+ * @fds:	number of FDs which were accounted for
-+ *
-+ * This does the reverse of kdbus_conn_quota_inc(). You have to release any
-+ * accounted resources that you called kdbus_conn_quota_inc() for. However, you
-+ * must not call kdbus_conn_quota_dec() if the accounting failed (that is,
-+ * kdbus_conn_quota_inc() failed).
-+ */
-+void kdbus_conn_quota_dec(struct kdbus_conn *c, struct kdbus_user *u,
-+			  size_t memory, size_t fds)
-+{
-+	struct kdbus_quota *quota;
-+	unsigned int id;
-+
-+	id = u ? u->id : KDBUS_USER_KERNEL_ID;
-+	if (WARN_ON(id >= c->n_quota))
-+		return;
-+
-+	quota = &c->quota[id];
-+
-+	if (!WARN_ON(quota->msgs == 0))
-+		--quota->msgs;
-+	if (!WARN_ON(quota->memory < memory))
-+		quota->memory -= memory;
-+	if (!WARN_ON(quota->fds < fds))
-+		quota->fds -= fds;
-+}
-+
-+/**
-+ * kdbus_conn_lost_message() - handle lost messages
-+ * @c:		connection that lost a message
-+ *
-+ * kdbus is reliable. That means, we try hard to never lose messages. However,
-+ * memory is limited, so we cannot rely on transmissions to never fail.
-+ * Therefore, we use quota-limits to let callers know if their unicast message
-+ * cannot be transmitted to a peer. This works fine for unicasts, but for
-+ * broadcasts we cannot make the caller handle the transmission failure.
-+ * Instead, we must let the destination know that it couldn't receive a
-+ * broadcast.
-+ * As this is an unlikely scenario, we keep it simple. A single lost-counter
-+ * remembers the number of lost messages since the last call to RECV. The next
-+ * message retrieval will notify the connection that it lost messages since the
-+ * last message retrieval and thus should resync its state.
-+ */
-+void kdbus_conn_lost_message(struct kdbus_conn *c)
-+{
-+	if (atomic_inc_return(&c->lost_count) == 1)
-+		wake_up_interruptible(&c->wait);
-+}
-+
-+/* Callers should take the conn_dst lock */
-+static struct kdbus_queue_entry *
-+kdbus_conn_entry_make(struct kdbus_conn *conn_src,
-+		      struct kdbus_conn *conn_dst,
-+		      struct kdbus_staging *staging)
-+{
-+	/* The remote connection was disconnected */
-+	if (!kdbus_conn_active(conn_dst))
-+		return ERR_PTR(-ECONNRESET);
-+
-+	/*
-+	 * If the connection does not accept file descriptors but the message
-+	 * has some attached, refuse it.
-+	 *
-+	 * If this is a monitor connection, accept the message. In that
-+	 * case, all file descriptors will be set to -1 at receive time.
-+	 */
-+	if (!kdbus_conn_is_monitor(conn_dst) &&
-+	    !(conn_dst->flags & KDBUS_HELLO_ACCEPT_FD) &&
-+	    staging->gaps && staging->gaps->n_fds > 0)
-+		return ERR_PTR(-ECOMM);
-+
-+	return kdbus_queue_entry_new(conn_src, conn_dst, staging);
-+}
-+
-+/*
-+ * Synchronously responding to a message, allocate a queue entry
-+ * and attach it to the reply tracking object.
-+ * The connection's queue will never get to see it.
-+ */
-+static int kdbus_conn_entry_sync_attach(struct kdbus_conn *conn_dst,
-+					struct kdbus_staging *staging,
-+					struct kdbus_reply *reply_wake)
-+{
-+	struct kdbus_queue_entry *entry;
-+	int remote_ret, ret = 0;
-+
-+	mutex_lock(&reply_wake->reply_dst->lock);
-+
-+	/*
-+	 * If we are still waiting then proceed, allocate a queue
-+	 * entry and attach it to the reply object
-+	 */
-+	if (reply_wake->waiting) {
-+		entry = kdbus_conn_entry_make(reply_wake->reply_src, conn_dst,
-+					      staging);
-+		if (IS_ERR(entry))
-+			ret = PTR_ERR(entry);
-+		else
-+			/* Attach the entry to the reply object */
-+			reply_wake->queue_entry = entry;
-+	} else {
-+		ret = -ECONNRESET;
-+	}
-+
-+	/*
-+	 * Update the reply object and wake up remote peer only
-+	 * on appropriate return codes
-+	 *
-+	 * * -ECOMM: if the replying connection failed with -ECOMM
-+	 *           then wakeup remote peer with -EREMOTEIO
-+	 *
-+	 *           We do this to differenciate between -ECOMM errors
-+	 *           from the original sender perspective:
-+	 *           -ECOMM error during the sync send and
-+	 *           -ECOMM error during the sync reply, this last
-+	 *           one is rewritten to -EREMOTEIO
-+	 *
-+	 * * Wake up on all other return codes.
-+	 */
-+	remote_ret = ret;
-+
-+	if (ret == -ECOMM)
-+		remote_ret = -EREMOTEIO;
-+
-+	kdbus_sync_reply_wakeup(reply_wake, remote_ret);
-+	kdbus_reply_unlink(reply_wake);
-+	mutex_unlock(&reply_wake->reply_dst->lock);
-+
-+	return ret;
-+}
-+
-+/**
-+ * kdbus_conn_entry_insert() - enqueue a message into the receiver's pool
-+ * @conn_src:		The sending connection
-+ * @conn_dst:		The connection to queue into
-+ * @staging:		Message to send
-+ * @reply:		The reply tracker to attach to the queue entry
-+ * @name:		Destination name this msg is sent to, or NULL
-+ *
-+ * Return: 0 on success. negative error otherwise.
-+ */
-+int kdbus_conn_entry_insert(struct kdbus_conn *conn_src,
-+			    struct kdbus_conn *conn_dst,
-+			    struct kdbus_staging *staging,
-+			    struct kdbus_reply *reply,
-+			    const struct kdbus_name_entry *name)
-+{
-+	struct kdbus_queue_entry *entry;
-+	int ret;
-+
-+	kdbus_conn_lock2(conn_src, conn_dst);
-+
-+	entry = kdbus_conn_entry_make(conn_src, conn_dst, staging);
-+	if (IS_ERR(entry)) {
-+		ret = PTR_ERR(entry);
-+		goto exit_unlock;
-+	}
-+
-+	if (reply) {
-+		kdbus_reply_link(reply);
-+		if (!reply->sync)
-+			schedule_delayed_work(&conn_src->work, 0);
-+	}
-+
-+	/*
-+	 * Record the sequence number of the registered name; it will
-+	 * be remembered by the queue, in case messages addressed to a
-+	 * name need to be moved from or to an activator.
-+	 */
-+	if (name)
-+		entry->dst_name_id = name->name_id;
-+
-+	kdbus_queue_entry_enqueue(entry, reply);
-+	wake_up_interruptible(&conn_dst->wait);
-+
-+	ret = 0;
-+
-+exit_unlock:
-+	kdbus_conn_unlock2(conn_src, conn_dst);
-+	return ret;
-+}
-+
-+static int kdbus_conn_wait_reply(struct kdbus_conn *conn_src,
-+				 struct kdbus_cmd_send *cmd_send,
-+				 struct file *ioctl_file,
-+				 struct file *cancel_fd,
-+				 struct kdbus_reply *reply_wait,
-+				 ktime_t expire)
-+{
-+	struct kdbus_queue_entry *entry;
-+	struct poll_wqueues pwq = {};
-+	int ret;
-+
-+	if (WARN_ON(!reply_wait))
-+		return -EIO;
-+
-+	/*
-+	 * Block until the reply arrives. reply_wait is left untouched
-+	 * by the timeout scans that might be conducted for other,
-+	 * asynchronous replies of conn_src.
-+	 */
-+
-+	poll_initwait(&pwq);
-+	poll_wait(ioctl_file, &conn_src->wait, &pwq.pt);
-+
-+	for (;;) {
-+		/*
-+		 * Any of the following conditions will stop our synchronously
-+		 * blocking SEND command:
-+		 *
-+		 * a) The origin sender closed its connection
-+		 * b) The remote peer answered, setting reply_wait->waiting = 0
-+		 * c) The cancel FD was written to
-+		 * d) A signal was received
-+		 * e) The specified timeout was reached, and none of the above
-+		 *    conditions kicked in.
-+		 */
-+
-+		/*
-+		 * We have already acquired an active reference when
-+		 * entering here, but another thread may call
-+		 * KDBUS_CMD_BYEBYE which does not acquire an active
-+		 * reference, therefore kdbus_conn_disconnect() will
-+		 * not wait for us.
-+		 */
-+		if (!kdbus_conn_active(conn_src)) {
-+			ret = -ECONNRESET;
-+			break;
-+		}
-+
-+		/*
-+		 * After the replying peer unset the waiting variable
-+		 * it will wake up us.
-+		 */
-+		if (!reply_wait->waiting) {
-+			ret = reply_wait->err;
-+			break;
-+		}
-+
-+		if (cancel_fd) {
-+			unsigned int r;
-+
-+			r = cancel_fd->f_op->poll(cancel_fd, &pwq.pt);
-+			if (r & POLLIN) {
-+				ret = -ECANCELED;
-+				break;
-+			}
-+		}
-+
-+		if (signal_pending(current)) {
-+			ret = -EINTR;
-+			break;
-+		}
-+
-+		if (!poll_schedule_timeout(&pwq, TASK_INTERRUPTIBLE,
-+					   &expire, 0)) {
-+			ret = -ETIMEDOUT;
-+			break;
-+		}
-+
-+		/*
-+		 * Reset the poll worker func, so the waitqueues are not
-+		 * added to the poll table again. We just reuse what we've
-+		 * collected earlier for further iterations.
-+		 */
-+		init_poll_funcptr(&pwq.pt, NULL);
-+	}
-+
-+	poll_freewait(&pwq);
-+
-+	if (ret == -EINTR) {
-+		/*
-+		 * Interrupted system call. Unref the reply object, and pass
-+		 * the return value down the chain. Mark the reply as
-+		 * interrupted, so the cleanup work can remove it, but do not
-+		 * unlink it from the list. Once the syscall restarts, we'll
-+		 * pick it up and wait on it again.
-+		 */
-+		mutex_lock(&conn_src->lock);
-+		reply_wait->interrupted = true;
-+		schedule_delayed_work(&conn_src->work, 0);
-+		mutex_unlock(&conn_src->lock);
-+
-+		return -ERESTARTSYS;
-+	}
-+
-+	mutex_lock(&conn_src->lock);
-+	reply_wait->waiting = false;
-+	entry = reply_wait->queue_entry;
-+	if (entry) {
-+		ret = kdbus_queue_entry_install(entry,
-+						&cmd_send->reply.return_flags,
-+						true);
-+		kdbus_pool_slice_publish(entry->slice, &cmd_send->reply.offset,
-+					 &cmd_send->reply.msg_size);
-+		kdbus_queue_entry_free(entry);
-+	}
-+	kdbus_reply_unlink(reply_wait);
-+	mutex_unlock(&conn_src->lock);
-+
-+	return ret;
-+}
-+
-+static int kdbus_pin_dst(struct kdbus_bus *bus,
-+			 struct kdbus_staging *staging,
-+			 struct kdbus_name_entry **out_name,
-+			 struct kdbus_conn **out_dst)
-+{
-+	const struct kdbus_msg *msg = staging->msg;
-+	struct kdbus_name_owner *owner = NULL;
-+	struct kdbus_name_entry *name = NULL;
-+	struct kdbus_conn *dst = NULL;
-+	int ret;
-+
-+	lockdep_assert_held(&bus->name_registry->rwlock);
-+
-+	if (!staging->dst_name) {
-+		dst = kdbus_bus_find_conn_by_id(bus, msg->dst_id);
-+		if (!dst)
-+			return -ENXIO;
-+
-+		if (!kdbus_conn_is_ordinary(dst)) {
-+			ret = -ENXIO;
-+			goto error;
-+		}
-+	} else {
-+		name = kdbus_name_lookup_unlocked(bus->name_registry,
-+						  staging->dst_name);
-+		if (name)
-+			owner = kdbus_name_get_owner(name);
-+		if (!owner)
-+			return -ESRCH;
-+
-+		/*
-+		 * If both a name and a connection ID are given as destination
-+		 * of a message, check that the currently owning connection of
-+		 * the name matches the specified ID.
-+		 * This way, we allow userspace to send the message to a
-+		 * specific connection by ID only if the connection currently
-+		 * owns the given name.
-+		 */
-+		if (msg->dst_id != KDBUS_DST_ID_NAME &&
-+		    msg->dst_id != owner->conn->id)
-+			return -EREMCHG;
-+
-+		if ((msg->flags & KDBUS_MSG_NO_AUTO_START) &&
-+		    kdbus_conn_is_activator(owner->conn))
-+			return -EADDRNOTAVAIL;
-+
-+		dst = kdbus_conn_ref(owner->conn);
-+	}
-+
-+	*out_name = name;
-+	*out_dst = dst;
-+	return 0;
-+
-+error:
-+	kdbus_conn_unref(dst);
-+	return ret;
-+}
-+
-+static int kdbus_conn_reply(struct kdbus_conn *src,
-+			    struct kdbus_staging *staging)
-+{
-+	const struct kdbus_msg *msg = staging->msg;
-+	struct kdbus_name_entry *name = NULL;
-+	struct kdbus_reply *reply, *wake = NULL;
-+	struct kdbus_conn *dst = NULL;
-+	struct kdbus_bus *bus = src->ep->bus;
-+	int ret;
-+
-+	if (WARN_ON(msg->dst_id == KDBUS_DST_ID_BROADCAST) ||
-+	    WARN_ON(msg->flags & KDBUS_MSG_EXPECT_REPLY) ||
-+	    WARN_ON(msg->flags & KDBUS_MSG_SIGNAL))
-+		return -EINVAL;
-+
-+	/* name-registry must be locked for lookup *and* collecting data */
-+	down_read(&bus->name_registry->rwlock);
-+
-+	/* find and pin destination */
-+
-+	ret = kdbus_pin_dst(bus, staging, &name, &dst);
-+	if (ret < 0)
-+		goto exit;
-+
-+	mutex_lock(&dst->lock);
-+	reply = kdbus_reply_find(src, dst, msg->cookie_reply);
-+	if (reply) {
-+		if (reply->sync)
-+			wake = kdbus_reply_ref(reply);
-+		kdbus_reply_unlink(reply);
-+	}
-+	mutex_unlock(&dst->lock);
-+
-+	if (!reply) {
-+		ret = -EBADSLT;
-+		goto exit;
-+	}
-+
-+	/* send message */
-+
-+	kdbus_bus_eavesdrop(bus, src, staging);
-+
-+	if (wake)
-+		ret = kdbus_conn_entry_sync_attach(dst, staging, wake);
-+	else
-+		ret = kdbus_conn_entry_insert(src, dst, staging, NULL, name);
-+
-+exit:
-+	up_read(&bus->name_registry->rwlock);
-+	kdbus_reply_unref(wake);
-+	kdbus_conn_unref(dst);
-+	return ret;
-+}
-+
-+static struct kdbus_reply *kdbus_conn_call(struct kdbus_conn *src,
-+					   struct kdbus_staging *staging,
-+					   ktime_t exp)
-+{
-+	const struct kdbus_msg *msg = staging->msg;
-+	struct kdbus_name_entry *name = NULL;
-+	struct kdbus_reply *wait = NULL;
-+	struct kdbus_conn *dst = NULL;
-+	struct kdbus_bus *bus = src->ep->bus;
-+	int ret;
-+
-+	if (WARN_ON(msg->dst_id == KDBUS_DST_ID_BROADCAST) ||
-+	    WARN_ON(msg->flags & KDBUS_MSG_SIGNAL) ||
-+	    WARN_ON(!(msg->flags & KDBUS_MSG_EXPECT_REPLY)))
-+		return ERR_PTR(-EINVAL);
-+
-+	/* resume previous wait-context, if available */
-+
-+	mutex_lock(&src->lock);
-+	wait = kdbus_reply_find(NULL, src, msg->cookie);
-+	if (wait) {
-+		if (wait->interrupted) {
-+			kdbus_reply_ref(wait);
-+			wait->interrupted = false;
-+		} else {
-+			wait = NULL;
-+		}
-+	}
-+	mutex_unlock(&src->lock);
-+
-+	if (wait)
-+		return wait;
-+
-+	if (ktime_compare(ktime_get(), exp) >= 0)
-+		return ERR_PTR(-ETIMEDOUT);
-+
-+	/* name-registry must be locked for lookup *and* collecting data */
-+	down_read(&bus->name_registry->rwlock);
-+
-+	/* find and pin destination */
-+
-+	ret = kdbus_pin_dst(bus, staging, &name, &dst);
-+	if (ret < 0)
-+		goto exit;
-+
-+	if (!kdbus_conn_policy_talk(src, current_cred(), dst)) {
-+		ret = -EPERM;
-+		goto exit;
-+	}
-+
-+	wait = kdbus_reply_new(dst, src, msg, name, true);
-+	if (IS_ERR(wait)) {
-+		ret = PTR_ERR(wait);
-+		wait = NULL;
-+		goto exit;
-+	}
-+
-+	/* send message */
-+
-+	kdbus_bus_eavesdrop(bus, src, staging);
-+
-+	ret = kdbus_conn_entry_insert(src, dst, staging, wait, name);
-+	if (ret < 0)
-+		goto exit;
-+
-+	ret = 0;
-+
-+exit:
-+	up_read(&bus->name_registry->rwlock);
-+	if (ret < 0) {
-+		kdbus_reply_unref(wait);
-+		wait = ERR_PTR(ret);
-+	}
-+	kdbus_conn_unref(dst);
-+	return wait;
-+}
-+
-+static int kdbus_conn_unicast(struct kdbus_conn *src,
-+			      struct kdbus_staging *staging)
-+{
-+	const struct kdbus_msg *msg = staging->msg;
-+	struct kdbus_name_entry *name = NULL;
-+	struct kdbus_reply *wait = NULL;
-+	struct kdbus_conn *dst = NULL;
-+	struct kdbus_bus *bus = src->ep->bus;
-+	bool is_signal = (msg->flags & KDBUS_MSG_SIGNAL);
-+	int ret = 0;
-+
-+	if (WARN_ON(msg->dst_id == KDBUS_DST_ID_BROADCAST) ||
-+	    WARN_ON(!(msg->flags & KDBUS_MSG_EXPECT_REPLY) &&
-+		    msg->cookie_reply != 0))
-+		return -EINVAL;
-+
-+	/* name-registry must be locked for lookup *and* collecting data */
-+	down_read(&bus->name_registry->rwlock);
-+
-+	/* find and pin destination */
-+
-+	ret = kdbus_pin_dst(bus, staging, &name, &dst);
-+	if (ret < 0)
-+		goto exit;
-+
-+	if (is_signal) {
-+		/* like broadcasts we eavesdrop even if the msg is dropped */
-+		kdbus_bus_eavesdrop(bus, src, staging);
-+
-+		/* drop silently if peer is not interested or not privileged */
-+		if (!kdbus_match_db_match_msg(dst->match_db, src, staging) ||
-+		    !kdbus_conn_policy_talk(dst, NULL, src))
-+			goto exit;
-+	} else if (!kdbus_conn_policy_talk(src, current_cred(), dst)) {
-+		ret = -EPERM;
-+		goto exit;
-+	} else if (msg->flags & KDBUS_MSG_EXPECT_REPLY) {
-+		wait = kdbus_reply_new(dst, src, msg, name, false);
-+		if (IS_ERR(wait)) {
-+			ret = PTR_ERR(wait);
-+			wait = NULL;
-+			goto exit;
-+		}
-+	}
-+
-+	/* send message */
-+
-+	if (!is_signal)
-+		kdbus_bus_eavesdrop(bus, src, staging);
-+
-+	ret = kdbus_conn_entry_insert(src, dst, staging, wait, name);
-+	if (ret < 0 && !is_signal)
-+		goto exit;
-+
-+	/* signals are treated like broadcasts, recv-errors are ignored */
-+	ret = 0;
-+
-+exit:
-+	up_read(&bus->name_registry->rwlock);
-+	kdbus_reply_unref(wait);
-+	kdbus_conn_unref(dst);
-+	return ret;
-+}
-+
-+/**
-+ * kdbus_conn_move_messages() - move messages from one connection to another
-+ * @conn_dst:		Connection to copy to
-+ * @conn_src:		Connection to copy from
-+ * @name_id:		Filter for the sequence number of the registered
-+ *			name, 0 means no filtering.
-+ *
-+ * Move all messages from one connection to another. This is used when
-+ * an implementer connection is taking over/giving back a well-known name
-+ * from/to an activator connection.
-+ */
-+void kdbus_conn_move_messages(struct kdbus_conn *conn_dst,
-+			      struct kdbus_conn *conn_src,
-+			      u64 name_id)
-+{
-+	struct kdbus_queue_entry *e, *e_tmp;
-+	struct kdbus_reply *r, *r_tmp;
-+	struct kdbus_bus *bus;
-+	struct kdbus_conn *c;
-+	LIST_HEAD(msg_list);
-+	int i, ret = 0;
-+
-+	if (WARN_ON(conn_src == conn_dst))
-+		return;
-+
-+	bus = conn_src->ep->bus;
-+
-+	/* lock order: domain -> bus -> ep -> names -> conn */
-+	down_read(&bus->conn_rwlock);
-+	hash_for_each(bus->conn_hash, i, c, hentry) {
-+		if (c == conn_src || c == conn_dst)
-+			continue;
-+
-+		mutex_lock(&c->lock);
-+		list_for_each_entry_safe(r, r_tmp, &c->reply_list, entry) {
-+			if (r->reply_src != conn_src)
-+				continue;
-+
-+			/* filter messages for a specific name */
-+			if (name_id > 0 && r->name_id != name_id)
-+				continue;
-+
-+			kdbus_conn_unref(r->reply_src);
-+			r->reply_src = kdbus_conn_ref(conn_dst);
-+		}
-+		mutex_unlock(&c->lock);
-+	}
-+	up_read(&bus->conn_rwlock);
-+
-+	kdbus_conn_lock2(conn_src, conn_dst);
-+	list_for_each_entry_safe(e, e_tmp, &conn_src->queue.msg_list, entry) {
-+		/* filter messages for a specific name */
-+		if (name_id > 0 && e->dst_name_id != name_id)
-+			continue;
-+
-+		if (!(conn_dst->flags & KDBUS_HELLO_ACCEPT_FD) &&
-+		    e->gaps && e->gaps->n_fds > 0) {
-+			kdbus_conn_lost_message(conn_dst);
-+			kdbus_queue_entry_free(e);
-+			continue;
-+		}
-+
-+		ret = kdbus_queue_entry_move(e, conn_dst);
-+		if (ret < 0) {
-+			kdbus_conn_lost_message(conn_dst);
-+			kdbus_queue_entry_free(e);
-+			continue;
-+		}
-+	}
-+	kdbus_conn_unlock2(conn_src, conn_dst);
-+
-+	/* wake up poll() */
-+	wake_up_interruptible(&conn_dst->wait);
-+}
-+
-+/* query the policy-database for all names of @whom */
-+static bool kdbus_conn_policy_query_all(struct kdbus_conn *conn,
-+					const struct cred *conn_creds,
-+					struct kdbus_policy_db *db,
-+					struct kdbus_conn *whom,
-+					unsigned int access)
-+{
-+	struct kdbus_name_owner *owner;
-+	bool pass = false;
-+	int res;
-+
-+	lockdep_assert_held(&conn->ep->bus->name_registry->rwlock);
-+
-+	down_read(&db->entries_rwlock);
-+	mutex_lock(&whom->lock);
-+
-+	list_for_each_entry(owner, &whom->names_list, conn_entry) {
-+		if (owner->flags & KDBUS_NAME_IN_QUEUE)
-+			continue;
-+
-+		res = kdbus_policy_query_unlocked(db,
-+					conn_creds ? : conn->cred,
-+					owner->name->name,
-+					kdbus_strhash(owner->name->name));
-+		if (res >= (int)access) {
-+			pass = true;
-+			break;
-+		}
-+	}
-+
-+	mutex_unlock(&whom->lock);
-+	up_read(&db->entries_rwlock);
-+
-+	return pass;
-+}
-+
-+/**
-+ * kdbus_conn_policy_own_name() - verify a connection can own the given name
-+ * @conn:		Connection
-+ * @conn_creds:		Credentials of @conn to use for policy check
-+ * @name:		Name
-+ *
-+ * This verifies that @conn is allowed to acquire the well-known name @name.
-+ *
-+ * Return: true if allowed, false if not.
-+ */
-+bool kdbus_conn_policy_own_name(struct kdbus_conn *conn,
-+				const struct cred *conn_creds,
-+				const char *name)
-+{
-+	unsigned int hash = kdbus_strhash(name);
-+	int res;
-+
-+	if (!conn_creds)
-+		conn_creds = conn->cred;
-+
-+	if (conn->ep->user) {
-+		res = kdbus_policy_query(&conn->ep->policy_db, conn_creds,
-+					 name, hash);
-+		if (res < KDBUS_POLICY_OWN)
-+			return false;
-+	}
-+
-+	if (conn->owner)
-+		return true;
-+
-+	res = kdbus_policy_query(&conn->ep->bus->policy_db, conn_creds,
-+				 name, hash);
-+	return res >= KDBUS_POLICY_OWN;
-+}
-+
-+/**
-+ * kdbus_conn_policy_talk() - verify a connection can talk to a given peer
-+ * @conn:		Connection that tries to talk
-+ * @conn_creds:		Credentials of @conn to use for policy check
-+ * @to:			Connection that is talked to
-+ *
-+ * This verifies that @conn is allowed to talk to @to.
-+ *
-+ * Return: true if allowed, false if not.
-+ */
-+bool kdbus_conn_policy_talk(struct kdbus_conn *conn,
-+			    const struct cred *conn_creds,
-+			    struct kdbus_conn *to)
-+{
-+	if (!conn_creds)
-+		conn_creds = conn->cred;
-+
-+	if (conn->ep->user &&
-+	    !kdbus_conn_policy_query_all(conn, conn_creds, &conn->ep->policy_db,
-+					 to, KDBUS_POLICY_TALK))
-+		return false;
-+
-+	if (conn->owner)
-+		return true;
-+	if (uid_eq(conn_creds->euid, to->cred->uid))
-+		return true;
-+
-+	return kdbus_conn_policy_query_all(conn, conn_creds,
-+					   &conn->ep->bus->policy_db, to,
-+					   KDBUS_POLICY_TALK);
-+}
-+
-+/**
-+ * kdbus_conn_policy_see_name_unlocked() - verify a connection can see a given
-+ *					   name
-+ * @conn:		Connection
-+ * @conn_creds:		Credentials of @conn to use for policy check
-+ * @name:		Name
-+ *
-+ * This verifies that @conn is allowed to see the well-known name @name. Caller
-+ * must hold policy-lock.
-+ *
-+ * Return: true if allowed, false if not.
-+ */
-+bool kdbus_conn_policy_see_name_unlocked(struct kdbus_conn *conn,
-+					 const struct cred *conn_creds,
-+					 const char *name)
-+{
-+	int res;
-+
-+	/*
-+	 * By default, all names are visible on a bus. SEE policies can only be
-+	 * installed on custom endpoints, where by default no name is visible.
-+	 */
-+	if (!conn->ep->user)
-+		return true;
-+
-+	res = kdbus_policy_query_unlocked(&conn->ep->policy_db,
-+					  conn_creds ? : conn->cred,
-+					  name, kdbus_strhash(name));
-+	return res >= KDBUS_POLICY_SEE;
-+}
-+
-+static bool kdbus_conn_policy_see_name(struct kdbus_conn *conn,
-+				       const struct cred *conn_creds,
-+				       const char *name)
-+{
-+	bool res;
-+
-+	down_read(&conn->ep->policy_db.entries_rwlock);
-+	res = kdbus_conn_policy_see_name_unlocked(conn, conn_creds, name);
-+	up_read(&conn->ep->policy_db.entries_rwlock);
-+
-+	return res;
-+}
-+
-+static bool kdbus_conn_policy_see(struct kdbus_conn *conn,
-+				  const struct cred *conn_creds,
-+				  struct kdbus_conn *whom)
-+{
-+	/*
-+	 * By default, all names are visible on a bus, so a connection can
-+	 * always see other connections. SEE policies can only be installed on
-+	 * custom endpoints, where by default no name is visible and we hide
-+	 * peers from each other, unless you see at least _one_ name of the
-+	 * peer.
-+	 */
-+	return !conn->ep->user ||
-+	       kdbus_conn_policy_query_all(conn, conn_creds,
-+					   &conn->ep->policy_db, whom,
-+					   KDBUS_POLICY_SEE);
-+}
-+
-+/**
-+ * kdbus_conn_policy_see_notification() - verify a connection is allowed to
-+ *					  receive a given kernel notification
-+ * @conn:		Connection
-+ * @conn_creds:		Credentials of @conn to use for policy check
-+ * @msg:		Notification message
-+ *
-+ * This checks whether @conn is allowed to see the kernel notification.
-+ *
-+ * Return: true if allowed, false if not.
-+ */
-+bool kdbus_conn_policy_see_notification(struct kdbus_conn *conn,
-+					const struct cred *conn_creds,
-+					const struct kdbus_msg *msg)
-+{
-+	/*
-+	 * Depending on the notification type, broadcasted kernel notifications
-+	 * have to be filtered:
-+	 *
-+	 * KDBUS_ITEM_NAME_{ADD,REMOVE,CHANGE}: This notification is forwarded
-+	 *     to a peer if, and only if, that peer can see the name this
-+	 *     notification is for.
-+	 *
-+	 * KDBUS_ITEM_ID_{ADD,REMOVE}: Notifications for ID changes are
-+	 *     broadcast to everyone, to allow tracking peers.
-+	 */
-+
-+	switch (msg->items[0].type) {
-+	case KDBUS_ITEM_NAME_ADD:
-+	case KDBUS_ITEM_NAME_REMOVE:
-+	case KDBUS_ITEM_NAME_CHANGE:
-+		return kdbus_conn_policy_see_name(conn, conn_creds,
-+					msg->items[0].name_change.name);
-+
-+	case KDBUS_ITEM_ID_ADD:
-+	case KDBUS_ITEM_ID_REMOVE:
-+		return true;
-+
-+	default:
-+		WARN(1, "Invalid type for notification broadcast: %llu\n",
-+		     (unsigned long long)msg->items[0].type);
-+		return false;
-+	}
-+}
-+
-+/**
-+ * kdbus_cmd_hello() - handle KDBUS_CMD_HELLO
-+ * @ep:			Endpoint to operate on
-+ * @file:		File this connection is opened on
-+ * @argp:		Command payload
-+ *
-+ * Return: NULL or newly created connection on success, ERR_PTR on failure.
-+ */
-+struct kdbus_conn *kdbus_cmd_hello(struct kdbus_ep *ep, struct file *file,
-+				   void __user *argp)
-+{
-+	struct kdbus_cmd_hello *cmd;
-+	struct kdbus_conn *c = NULL;
-+	const char *item_name;
-+	int ret;
-+
-+	struct kdbus_arg argv[] = {
-+		{ .type = KDBUS_ITEM_NEGOTIATE },
-+		{ .type = KDBUS_ITEM_NAME },
-+		{ .type = KDBUS_ITEM_CREDS },
-+		{ .type = KDBUS_ITEM_PIDS },
-+		{ .type = KDBUS_ITEM_SECLABEL },
-+		{ .type = KDBUS_ITEM_CONN_DESCRIPTION },
-+		{ .type = KDBUS_ITEM_POLICY_ACCESS, .multiple = true },
-+	};
-+	struct kdbus_args args = {
-+		.allowed_flags = KDBUS_FLAG_NEGOTIATE |
-+				 KDBUS_HELLO_ACCEPT_FD |
-+				 KDBUS_HELLO_ACTIVATOR |
-+				 KDBUS_HELLO_POLICY_HOLDER |
-+				 KDBUS_HELLO_MONITOR,
-+		.argv = argv,
-+		.argc = ARRAY_SIZE(argv),
-+	};
-+
-+	ret = kdbus_args_parse(&args, argp, &cmd);
-+	if (ret < 0)
-+		return ERR_PTR(ret);
-+	if (ret > 0)
-+		return NULL;
-+
-+	item_name = argv[1].item ? argv[1].item->str : NULL;
-+
-+	c = kdbus_conn_new(ep, file, cmd, item_name,
-+			   argv[2].item ? &argv[2].item->creds : NULL,
-+			   argv[3].item ? &argv[3].item->pids : NULL,
-+			   argv[4].item ? argv[4].item->str : NULL,
-+			   argv[5].item ? argv[5].item->str : NULL);
-+	if (IS_ERR(c)) {
-+		ret = PTR_ERR(c);
-+		c = NULL;
-+		goto exit;
-+	}
-+
-+	ret = kdbus_conn_connect(c, item_name);
-+	if (ret < 0)
-+		goto exit;
-+
-+	if (kdbus_conn_is_activator(c) || kdbus_conn_is_policy_holder(c)) {
-+		ret = kdbus_conn_acquire(c);
-+		if (ret < 0)
-+			goto exit;
-+
-+		ret = kdbus_policy_set(&c->ep->bus->policy_db, args.items,
-+				       args.items_size, 1,
-+				       kdbus_conn_is_policy_holder(c), c);
-+		kdbus_conn_release(c);
-+		if (ret < 0)
-+			goto exit;
-+	}
-+
-+	if (copy_to_user(argp, cmd, sizeof(*cmd)))
-+		ret = -EFAULT;
-+
-+exit:
-+	ret = kdbus_args_clear(&args, ret);
-+	if (ret < 0) {
-+		if (c) {
-+			kdbus_conn_disconnect(c, false);
-+			kdbus_conn_unref(c);
-+		}
-+		return ERR_PTR(ret);
-+	}
-+	return c;
-+}
-+
-+/**
-+ * kdbus_cmd_byebye_unlocked() - handle KDBUS_CMD_BYEBYE
-+ * @conn:		connection to operate on
-+ * @argp:		command payload
-+ *
-+ * The caller must not hold any active reference to @conn or this will deadlock.
-+ *
-+ * Return: >=0 on success, negative error code on failure.
-+ */
-+int kdbus_cmd_byebye_unlocked(struct kdbus_conn *conn, void __user *argp)
-+{
-+	struct kdbus_cmd *cmd;
-+	int ret;
-+
-+	struct kdbus_arg argv[] = {
-+		{ .type = KDBUS_ITEM_NEGOTIATE },
-+	};
-+	struct kdbus_args args = {
-+		.allowed_flags = KDBUS_FLAG_NEGOTIATE,
-+		.argv = argv,
-+		.argc = ARRAY_SIZE(argv),
-+	};
-+
-+	if (!kdbus_conn_is_ordinary(conn))
-+		return -EOPNOTSUPP;
-+
-+	ret = kdbus_args_parse(&args, argp, &cmd);
-+	if (ret != 0)
-+		return ret;
-+
-+	ret = kdbus_conn_disconnect(conn, true);
-+	return kdbus_args_clear(&args, ret);
-+}
-+
-+/**
-+ * kdbus_cmd_conn_info() - handle KDBUS_CMD_CONN_INFO
-+ * @conn:		connection to operate on
-+ * @argp:		command payload
-+ *
-+ * Return: >=0 on success, negative error code on failure.
-+ */
-+int kdbus_cmd_conn_info(struct kdbus_conn *conn, void __user *argp)
-+{
-+	struct kdbus_meta_conn *conn_meta = NULL;
-+	struct kdbus_pool_slice *slice = NULL;
-+	struct kdbus_name_entry *entry = NULL;
-+	struct kdbus_name_owner *owner = NULL;
-+	struct kdbus_conn *owner_conn = NULL;
-+	struct kdbus_item *meta_items = NULL;
-+	struct kdbus_info info = {};
-+	struct kdbus_cmd_info *cmd;
-+	struct kdbus_bus *bus = conn->ep->bus;
-+	struct kvec kvec[3];
-+	size_t meta_size, cnt = 0;
-+	const char *name;
-+	u64 attach_flags, size = 0;
-+	int ret;
-+
-+	struct kdbus_arg argv[] = {
-+		{ .type = KDBUS_ITEM_NEGOTIATE },
-+		{ .type = KDBUS_ITEM_NAME },
-+	};
-+	struct kdbus_args args = {
-+		.allowed_flags = KDBUS_FLAG_NEGOTIATE,
-+		.argv = argv,
-+		.argc = ARRAY_SIZE(argv),
-+	};
-+
-+	ret = kdbus_args_parse(&args, argp, &cmd);
-+	if (ret != 0)
-+		return ret;
-+
-+	/* registry must be held throughout lookup *and* collecting data */
-+	down_read(&bus->name_registry->rwlock);
-+
-+	ret = kdbus_sanitize_attach_flags(cmd->attach_flags, &attach_flags);
-+	if (ret < 0)
-+		goto exit;
-+
-+	name = argv[1].item ? argv[1].item->str : NULL;
-+
-+	if (name) {
-+		entry = kdbus_name_lookup_unlocked(bus->name_registry, name);
-+		if (entry)
-+			owner = kdbus_name_get_owner(entry);
-+		if (!owner ||
-+		    !kdbus_conn_policy_see_name(conn, current_cred(), name) ||
-+		    (cmd->id != 0 && owner->conn->id != cmd->id)) {
-+			/* pretend a name doesn't exist if you cannot see it */
-+			ret = -ESRCH;
-+			goto exit;
-+		}
-+
-+		owner_conn = kdbus_conn_ref(owner->conn);
-+	} else if (cmd->id > 0) {
-+		owner_conn = kdbus_bus_find_conn_by_id(bus, cmd->id);
-+		if (!owner_conn || !kdbus_conn_policy_see(conn, current_cred(),
-+							  owner_conn)) {
-+			/* pretend an id doesn't exist if you cannot see it */
-+			ret = -ENXIO;
-+			goto exit;
-+		}
-+	} else {
-+		ret = -EINVAL;
-+		goto exit;
-+	}
-+
-+	attach_flags &= atomic64_read(&owner_conn->attach_flags_send);
-+
-+	conn_meta = kdbus_meta_conn_new();
-+	if (IS_ERR(conn_meta)) {
-+		ret = PTR_ERR(conn_meta);
-+		conn_meta = NULL;
-+		goto exit;
-+	}
-+
-+	ret = kdbus_meta_conn_collect(conn_meta, owner_conn, 0, attach_flags);
-+	if (ret < 0)
-+		goto exit;
-+
-+	ret = kdbus_meta_emit(owner_conn->meta_proc, owner_conn->meta_fake,
-+			      conn_meta, conn, attach_flags,
-+			      &meta_items, &meta_size);
-+	if (ret < 0)
-+		goto exit;
-+
-+	info.id = owner_conn->id;
-+	info.flags = owner_conn->flags;
-+
-+	kdbus_kvec_set(&kvec[cnt++], &info, sizeof(info), &size);
-+	if (meta_size > 0) {
-+		kdbus_kvec_set(&kvec[cnt++], meta_items, meta_size, &size);
-+		cnt += !!kdbus_kvec_pad(&kvec[cnt], &size);
-+	}
-+
-+	info.size = size;
-+
-+	slice = kdbus_pool_slice_alloc(conn->pool, size, false);
-+	if (IS_ERR(slice)) {
-+		ret = PTR_ERR(slice);
-+		slice = NULL;
-+		goto exit;
-+	}
-+
-+	ret = kdbus_pool_slice_copy_kvec(slice, 0, kvec, cnt, size);
-+	if (ret < 0)
-+		goto exit;
-+
-+	kdbus_pool_slice_publish(slice, &cmd->offset, &cmd->info_size);
-+
-+	if (kdbus_member_set_user(&cmd->offset, argp, typeof(*cmd), offset) ||
-+	    kdbus_member_set_user(&cmd->info_size, argp,
-+				  typeof(*cmd), info_size)) {
-+		ret = -EFAULT;
-+		goto exit;
-+	}
-+
-+	ret = 0;
-+
-+exit:
-+	up_read(&bus->name_registry->rwlock);
-+	kdbus_pool_slice_release(slice);
-+	kfree(meta_items);
-+	kdbus_meta_conn_unref(conn_meta);
-+	kdbus_conn_unref(owner_conn);
-+	return kdbus_args_clear(&args, ret);
-+}
-+
-+/**
-+ * kdbus_cmd_update() - handle KDBUS_CMD_UPDATE
-+ * @conn:		connection to operate on
-+ * @argp:		command payload
-+ *
-+ * Return: >=0 on success, negative error code on failure.
-+ */
-+int kdbus_cmd_update(struct kdbus_conn *conn, void __user *argp)
-+{
-+	struct kdbus_item *item_policy;
-+	u64 *item_attach_send = NULL;
-+	u64 *item_attach_recv = NULL;
-+	struct kdbus_cmd *cmd;
-+	u64 attach_send;
-+	u64 attach_recv;
-+	int ret;
-+
-+	struct kdbus_arg argv[] = {
-+		{ .type = KDBUS_ITEM_NEGOTIATE },
-+		{ .type = KDBUS_ITEM_ATTACH_FLAGS_SEND },
-+		{ .type = KDBUS_ITEM_ATTACH_FLAGS_RECV },
-+		{ .type = KDBUS_ITEM_NAME, .multiple = true },
-+		{ .type = KDBUS_ITEM_POLICY_ACCESS, .multiple = true },
-+	};
-+	struct kdbus_args args = {
-+		.allowed_flags = KDBUS_FLAG_NEGOTIATE,
-+		.argv = argv,
-+		.argc = ARRAY_SIZE(argv),
-+	};
-+
-+	ret = kdbus_args_parse(&args, argp, &cmd);
-+	if (ret != 0)
-+		return ret;
-+
-+	item_attach_send = argv[1].item ? &argv[1].item->data64[0] : NULL;
-+	item_attach_recv = argv[2].item ? &argv[2].item->data64[0] : NULL;
-+	item_policy = argv[3].item ? : argv[4].item;
-+
-+	if (item_attach_send) {
-+		if (!kdbus_conn_is_ordinary(conn) &&
-+		    !kdbus_conn_is_monitor(conn)) {
-+			ret = -EOPNOTSUPP;
-+			goto exit;
-+		}
-+
-+		ret = kdbus_sanitize_attach_flags(*item_attach_send,
-+						  &attach_send);
-+		if (ret < 0)
-+			goto exit;
-+	}
-+
-+	if (item_attach_recv) {
-+		if (!kdbus_conn_is_ordinary(conn) &&
-+		    !kdbus_conn_is_monitor(conn) &&
-+		    !kdbus_conn_is_activator(conn)) {
-+			ret = -EOPNOTSUPP;
-+			goto exit;
-+		}
-+
-+		ret = kdbus_sanitize_attach_flags(*item_attach_recv,
-+						  &attach_recv);
-+		if (ret < 0)
-+			goto exit;
-+	}
-+
-+	if (item_policy && !kdbus_conn_is_policy_holder(conn)) {
-+		ret = -EOPNOTSUPP;
-+		goto exit;
-+	}
-+
-+	/* now that we verified the input, update the connection */
-+
-+	if (item_policy) {
-+		ret = kdbus_policy_set(&conn->ep->bus->policy_db, cmd->items,
-+				       KDBUS_ITEMS_SIZE(cmd, items),
-+				       1, true, conn);
-+		if (ret < 0)
-+			goto exit;
-+	}
-+
-+	if (item_attach_send)
-+		atomic64_set(&conn->attach_flags_send, attach_send);
-+
-+	if (item_attach_recv)
-+		atomic64_set(&conn->attach_flags_recv, attach_recv);
-+
-+exit:
-+	return kdbus_args_clear(&args, ret);
-+}
-+
-+/**
-+ * kdbus_cmd_send() - handle KDBUS_CMD_SEND
-+ * @conn:		connection to operate on
-+ * @f:			file this command was called on
-+ * @argp:		command payload
-+ *
-+ * Return: >=0 on success, negative error code on failure.
-+ */
-+int kdbus_cmd_send(struct kdbus_conn *conn, struct file *f, void __user *argp)
-+{
-+	struct kdbus_cmd_send *cmd;
-+	struct kdbus_staging *staging = NULL;
-+	struct kdbus_msg *msg = NULL;
-+	struct file *cancel_fd = NULL;
-+	int ret, ret2;
-+
-+	/* command arguments */
-+	struct kdbus_arg argv[] = {
-+		{ .type = KDBUS_ITEM_NEGOTIATE },
-+		{ .type = KDBUS_ITEM_CANCEL_FD },
-+	};
-+	struct kdbus_args args = {
-+		.allowed_flags = KDBUS_FLAG_NEGOTIATE |
-+				 KDBUS_SEND_SYNC_REPLY,
-+		.argv = argv,
-+		.argc = ARRAY_SIZE(argv),
-+	};
-+
-+	/* message arguments */
-+	struct kdbus_arg msg_argv[] = {
-+		{ .type = KDBUS_ITEM_NEGOTIATE },
-+		{ .type = KDBUS_ITEM_PAYLOAD_VEC, .multiple = true },
-+		{ .type = KDBUS_ITEM_PAYLOAD_MEMFD, .multiple = true },
-+		{ .type = KDBUS_ITEM_FDS },
-+		{ .type = KDBUS_ITEM_BLOOM_FILTER },
-+		{ .type = KDBUS_ITEM_DST_NAME },
-+	};
-+	struct kdbus_args msg_args = {
-+		.allowed_flags = KDBUS_FLAG_NEGOTIATE |
-+				 KDBUS_MSG_EXPECT_REPLY |
-+				 KDBUS_MSG_NO_AUTO_START |
-+				 KDBUS_MSG_SIGNAL,
-+		.argv = msg_argv,
-+		.argc = ARRAY_SIZE(msg_argv),
-+	};
-+
-+	if (!kdbus_conn_is_ordinary(conn))
-+		return -EOPNOTSUPP;
-+
-+	/* make sure to parse both, @cmd and @msg on negotiation */
-+
-+	ret = kdbus_args_parse(&args, argp, &cmd);
-+	if (ret < 0)
-+		goto exit;
-+	else if (ret > 0 && !cmd->msg_address) /* negotiation without msg */
-+		goto exit;
-+
-+	ret2 = kdbus_args_parse_msg(&msg_args, KDBUS_PTR(cmd->msg_address),
-+				    &msg);
-+	if (ret2 < 0) { /* cannot parse message */
-+		ret = ret2;
-+		goto exit;
-+	} else if (ret2 > 0 && !ret) { /* msg-negot implies cmd-negot */
-+		ret = -EINVAL;
-+		goto exit;
-+	} else if (ret > 0) { /* negotiation */
-+		goto exit;
-+	}
-+
-+	/* here we parsed both, @cmd and @msg, and neither wants negotiation */
-+
-+	cmd->reply.return_flags = 0;
-+	kdbus_pool_publish_empty(conn->pool, &cmd->reply.offset,
-+				 &cmd->reply.msg_size);
-+
-+	if (argv[1].item) {
-+		cancel_fd = fget(argv[1].item->fds[0]);
-+		if (!cancel_fd) {
-+			ret = -EBADF;
-+			goto exit;
-+		}
-+
-+		if (!cancel_fd->f_op->poll) {
-+			ret = -EINVAL;
-+			goto exit;
-+		}
-+	}
-+
-+	/* patch-in the source of this message */
-+	if (msg->src_id > 0 && msg->src_id != conn->id) {
-+		ret = -EINVAL;
-+		goto exit;
-+	}
-+	msg->src_id = conn->id;
-+
-+	staging = kdbus_staging_new_user(conn->ep->bus, cmd, msg);
-+	if (IS_ERR(staging)) {
-+		ret = PTR_ERR(staging);
-+		staging = NULL;
-+		goto exit;
-+	}
-+
-+	if (msg->dst_id == KDBUS_DST_ID_BROADCAST) {
-+		down_read(&conn->ep->bus->name_registry->rwlock);
-+		kdbus_bus_broadcast(conn->ep->bus, conn, staging);
-+		up_read(&conn->ep->bus->name_registry->rwlock);
-+	} else if (cmd->flags & KDBUS_SEND_SYNC_REPLY) {
-+		struct kdbus_reply *r;
-+		ktime_t exp;
-+
-+		exp = ns_to_ktime(msg->timeout_ns);
-+		r = kdbus_conn_call(conn, staging, exp);
-+		if (IS_ERR(r)) {
-+			ret = PTR_ERR(r);
-+			goto exit;
-+		}
-+
-+		ret = kdbus_conn_wait_reply(conn, cmd, f, cancel_fd, r, exp);
-+		kdbus_reply_unref(r);
-+		if (ret < 0)
-+			goto exit;
-+	} else if ((msg->flags & KDBUS_MSG_EXPECT_REPLY) ||
-+		   msg->cookie_reply == 0) {
-+		ret = kdbus_conn_unicast(conn, staging);
-+		if (ret < 0)
-+			goto exit;
-+	} else {
-+		ret = kdbus_conn_reply(conn, staging);
-+		if (ret < 0)
-+			goto exit;
-+	}
-+
-+	if (kdbus_member_set_user(&cmd->reply, argp, typeof(*cmd), reply))
-+		ret = -EFAULT;
-+
-+exit:
-+	if (cancel_fd)
-+		fput(cancel_fd);
-+	kdbus_staging_free(staging);
-+	ret = kdbus_args_clear(&msg_args, ret);
-+	return kdbus_args_clear(&args, ret);
-+}
-+
-+/**
-+ * kdbus_cmd_recv() - handle KDBUS_CMD_RECV
-+ * @conn:		connection to operate on
-+ * @argp:		command payload
-+ *
-+ * Return: >=0 on success, negative error code on failure.
-+ */
-+int kdbus_cmd_recv(struct kdbus_conn *conn, void __user *argp)
-+{
-+	struct kdbus_queue_entry *entry;
-+	struct kdbus_cmd_recv *cmd;
-+	int ret;
-+
-+	struct kdbus_arg argv[] = {
-+		{ .type = KDBUS_ITEM_NEGOTIATE },
-+	};
-+	struct kdbus_args args = {
-+		.allowed_flags = KDBUS_FLAG_NEGOTIATE |
-+				 KDBUS_RECV_PEEK |
-+				 KDBUS_RECV_DROP |
-+				 KDBUS_RECV_USE_PRIORITY,
-+		.argv = argv,
-+		.argc = ARRAY_SIZE(argv),
-+	};
-+
-+	if (!kdbus_conn_is_ordinary(conn) &&
-+	    !kdbus_conn_is_monitor(conn) &&
-+	    !kdbus_conn_is_activator(conn))
-+		return -EOPNOTSUPP;
-+
-+	ret = kdbus_args_parse(&args, argp, &cmd);
-+	if (ret != 0)
-+		return ret;
-+
-+	cmd->dropped_msgs = 0;
-+	cmd->msg.return_flags = 0;
-+	kdbus_pool_publish_empty(conn->pool, &cmd->msg.offset,
-+				 &cmd->msg.msg_size);
-+
-+	/* DROP+priority is not realiably, so prevent it */
-+	if ((cmd->flags & KDBUS_RECV_DROP) &&
-+	    (cmd->flags & KDBUS_RECV_USE_PRIORITY)) {
-+		ret = -EINVAL;
-+		goto exit;
-+	}
-+
-+	mutex_lock(&conn->lock);
-+
-+	entry = kdbus_queue_peek(&conn->queue, cmd->priority,
-+				 cmd->flags & KDBUS_RECV_USE_PRIORITY);
-+	if (!entry) {
-+		mutex_unlock(&conn->lock);
-+		ret = -EAGAIN;
-+	} else if (cmd->flags & KDBUS_RECV_DROP) {
-+		struct kdbus_reply *reply = kdbus_reply_ref(entry->reply);
-+
-+		kdbus_queue_entry_free(entry);
-+
-+		mutex_unlock(&conn->lock);
-+
-+		if (reply) {
-+			mutex_lock(&reply->reply_dst->lock);
-+			if (!list_empty(&reply->entry)) {
-+				kdbus_reply_unlink(reply);
-+				if (reply->sync)
-+					kdbus_sync_reply_wakeup(reply, -EPIPE);
-+				else
-+					kdbus_notify_reply_dead(conn->ep->bus,
-+							reply->reply_dst->id,
-+							reply->cookie);
-+			}
-+			mutex_unlock(&reply->reply_dst->lock);
-+			kdbus_notify_flush(conn->ep->bus);
-+		}
-+
-+		kdbus_reply_unref(reply);
-+	} else {
-+		bool install_fds;
-+
-+		/*
-+		 * PEEK just returns the location of the next message. Do not
-+		 * install FDs nor memfds nor anything else. The only
-+		 * information of interest should be the message header and
-+		 * metadata. Any FD numbers in the payload is undefined for
-+		 * PEEK'ed messages.
-+		 * Also make sure to never install fds into a connection that
-+		 * has refused to receive any. Ordinary connections will not get
-+		 * messages with FDs queued (the receiver will get -ECOMM), but
-+		 * eavesdroppers might.
-+		 */
-+		install_fds = (conn->flags & KDBUS_HELLO_ACCEPT_FD) &&
-+			      !(cmd->flags & KDBUS_RECV_PEEK);
-+
-+		ret = kdbus_queue_entry_install(entry,
-+						&cmd->msg.return_flags,
-+						install_fds);
-+		if (ret < 0) {
-+			mutex_unlock(&conn->lock);
-+			goto exit;
-+		}
-+
-+		kdbus_pool_slice_publish(entry->slice, &cmd->msg.offset,
-+					 &cmd->msg.msg_size);
-+
-+		if (!(cmd->flags & KDBUS_RECV_PEEK))
-+			kdbus_queue_entry_free(entry);
-+
-+		mutex_unlock(&conn->lock);
-+	}
-+
-+	cmd->dropped_msgs = atomic_xchg(&conn->lost_count, 0);
-+	if (cmd->dropped_msgs > 0)
-+		cmd->return_flags |= KDBUS_RECV_RETURN_DROPPED_MSGS;
-+
-+	if (kdbus_member_set_user(&cmd->msg, argp, typeof(*cmd), msg) ||
-+	    kdbus_member_set_user(&cmd->dropped_msgs, argp, typeof(*cmd),
-+				  dropped_msgs))
-+		ret = -EFAULT;
-+
-+exit:
-+	return kdbus_args_clear(&args, ret);
-+}
-+
-+/**
-+ * kdbus_cmd_free() - handle KDBUS_CMD_FREE
-+ * @conn:		connection to operate on
-+ * @argp:		command payload
-+ *
-+ * Return: >=0 on success, negative error code on failure.
-+ */
-+int kdbus_cmd_free(struct kdbus_conn *conn, void __user *argp)
-+{
-+	struct kdbus_cmd_free *cmd;
-+	int ret;
-+
-+	struct kdbus_arg argv[] = {
-+		{ .type = KDBUS_ITEM_NEGOTIATE },
-+	};
-+	struct kdbus_args args = {
-+		.allowed_flags = KDBUS_FLAG_NEGOTIATE,
-+		.argv = argv,
-+		.argc = ARRAY_SIZE(argv),
-+	};
-+
-+	if (!kdbus_conn_is_ordinary(conn) &&
-+	    !kdbus_conn_is_monitor(conn) &&
-+	    !kdbus_conn_is_activator(conn))
-+		return -EOPNOTSUPP;
-+
-+	ret = kdbus_args_parse(&args, argp, &cmd);
-+	if (ret != 0)
-+		return ret;
-+
-+	ret = kdbus_pool_release_offset(conn->pool, cmd->offset);
-+
-+	return kdbus_args_clear(&args, ret);
-+}
-diff --git a/ipc/kdbus/connection.h b/ipc/kdbus/connection.h
-new file mode 100644
-index 0000000..1ad0820
---- /dev/null
-+++ b/ipc/kdbus/connection.h
-@@ -0,0 +1,260 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ * Copyright (C) 2014-2015 Djalal Harouni
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#ifndef __KDBUS_CONNECTION_H
-+#define __KDBUS_CONNECTION_H
-+
-+#include <linux/atomic.h>
-+#include <linux/kref.h>
-+#include <linux/lockdep.h>
-+#include <linux/path.h>
-+
-+#include "limits.h"
-+#include "metadata.h"
-+#include "pool.h"
-+#include "queue.h"
-+#include "util.h"
-+
-+#define KDBUS_HELLO_SPECIAL_CONN	(KDBUS_HELLO_ACTIVATOR | \
-+					 KDBUS_HELLO_POLICY_HOLDER | \
-+					 KDBUS_HELLO_MONITOR)
-+
-+struct kdbus_name_entry;
-+struct kdbus_quota;
-+struct kdbus_staging;
-+
-+/**
-+ * struct kdbus_conn - connection to a bus
-+ * @kref:		Reference count
-+ * @active:		Active references to the connection
-+ * @id:			Connection ID
-+ * @flags:		KDBUS_HELLO_* flags
-+ * @attach_flags_send:	KDBUS_ATTACH_* flags for sending
-+ * @attach_flags_recv:	KDBUS_ATTACH_* flags for receiving
-+ * @description:	Human-readable connection description, used for
-+ *			debugging. This field is only set when the
-+ *			connection is created.
-+ * @ep:			The endpoint this connection belongs to
-+ * @lock:		Connection data lock
-+ * @hentry:		Entry in ID <-> connection map
-+ * @ep_entry:		Entry in endpoint
-+ * @monitor_entry:	Entry in monitor, if the connection is a monitor
-+ * @reply_list:		List of connections this connection should
-+ *			reply to
-+ * @work:		Delayed work to handle timeouts
-+ *			activator for
-+ * @match_db:		Subscription filter to broadcast messages
-+ * @meta_proc:		Process metadata of connection creator, or NULL
-+ * @meta_fake:		Faked metadata, or NULL
-+ * @pool:		The user's buffer to receive messages
-+ * @user:		Owner of the connection
-+ * @cred:		The credentials of the connection at creation time
-+ * @pid:		Pid at creation time
-+ * @root_path:		Root path at creation time
-+ * @request_count:	Number of pending requests issued by this
-+ *			connection that are waiting for replies from
-+ *			other peers
-+ * @lost_count:		Number of lost broadcast messages
-+ * @wait:		Wake up this endpoint
-+ * @queue:		The message queue associated with this connection
-+ * @quota:		Array of per-user quota indexed by user->id
-+ * @n_quota:		Number of elements in quota array
-+ * @names_list:		List of well-known names
-+ * @name_count:		Number of owned well-known names
-+ * @privileged:		Whether this connection is privileged on the domain
-+ * @owner:		Owned by the same user as the bus owner
-+ */
-+struct kdbus_conn {
-+	struct kref kref;
-+	atomic_t active;
-+#ifdef CONFIG_DEBUG_LOCK_ALLOC
-+	struct lockdep_map dep_map;
-+#endif
-+	u64 id;
-+	u64 flags;
-+	atomic64_t attach_flags_send;
-+	atomic64_t attach_flags_recv;
-+	const char *description;
-+	struct kdbus_ep *ep;
-+	struct mutex lock;
-+	struct hlist_node hentry;
-+	struct list_head ep_entry;
-+	struct list_head monitor_entry;
-+	struct list_head reply_list;
-+	struct delayed_work work;
-+	struct kdbus_match_db *match_db;
-+	struct kdbus_meta_proc *meta_proc;
-+	struct kdbus_meta_fake *meta_fake;
-+	struct kdbus_pool *pool;
-+	struct kdbus_user *user;
-+	const struct cred *cred;
-+	struct pid *pid;
-+	struct path root_path;
-+	atomic_t request_count;
-+	atomic_t lost_count;
-+	wait_queue_head_t wait;
-+	struct kdbus_queue queue;
-+
-+	struct kdbus_quota *quota;
-+	unsigned int n_quota;
-+
-+	/* protected by registry->rwlock */
-+	struct list_head names_list;
-+	unsigned int name_count;
-+
-+	bool privileged:1;
-+	bool owner:1;
-+};
-+
-+struct kdbus_conn *kdbus_conn_ref(struct kdbus_conn *conn);
-+struct kdbus_conn *kdbus_conn_unref(struct kdbus_conn *conn);
-+bool kdbus_conn_active(const struct kdbus_conn *conn);
-+int kdbus_conn_acquire(struct kdbus_conn *conn);
-+void kdbus_conn_release(struct kdbus_conn *conn);
-+int kdbus_conn_disconnect(struct kdbus_conn *conn, bool ensure_queue_empty);
-+bool kdbus_conn_has_name(struct kdbus_conn *conn, const char *name);
-+int kdbus_conn_quota_inc(struct kdbus_conn *c, struct kdbus_user *u,
-+			 size_t memory, size_t fds);
-+void kdbus_conn_quota_dec(struct kdbus_conn *c, struct kdbus_user *u,
-+			  size_t memory, size_t fds);
-+void kdbus_conn_lost_message(struct kdbus_conn *c);
-+int kdbus_conn_entry_insert(struct kdbus_conn *conn_src,
-+			    struct kdbus_conn *conn_dst,
-+			    struct kdbus_staging *staging,
-+			    struct kdbus_reply *reply,
-+			    const struct kdbus_name_entry *name);
-+void kdbus_conn_move_messages(struct kdbus_conn *conn_dst,
-+			      struct kdbus_conn *conn_src,
-+			      u64 name_id);
-+
-+/* policy */
-+bool kdbus_conn_policy_own_name(struct kdbus_conn *conn,
-+				const struct cred *conn_creds,
-+				const char *name);
-+bool kdbus_conn_policy_talk(struct kdbus_conn *conn,
-+			    const struct cred *conn_creds,
-+			    struct kdbus_conn *to);
-+bool kdbus_conn_policy_see_name_unlocked(struct kdbus_conn *conn,
-+					 const struct cred *curr_creds,
-+					 const char *name);
-+bool kdbus_conn_policy_see_notification(struct kdbus_conn *conn,
-+					const struct cred *curr_creds,
-+					const struct kdbus_msg *msg);
-+
-+/* command dispatcher */
-+struct kdbus_conn *kdbus_cmd_hello(struct kdbus_ep *ep, struct file *file,
-+				   void __user *argp);
-+int kdbus_cmd_byebye_unlocked(struct kdbus_conn *conn, void __user *argp);
-+int kdbus_cmd_conn_info(struct kdbus_conn *conn, void __user *argp);
-+int kdbus_cmd_update(struct kdbus_conn *conn, void __user *argp);
-+int kdbus_cmd_send(struct kdbus_conn *conn, struct file *f, void __user *argp);
-+int kdbus_cmd_recv(struct kdbus_conn *conn, void __user *argp);
-+int kdbus_cmd_free(struct kdbus_conn *conn, void __user *argp);
-+
-+/**
-+ * kdbus_conn_is_ordinary() - Check if connection is ordinary
-+ * @conn:		The connection to check
-+ *
-+ * Return: Non-zero if the connection is an ordinary connection
-+ */
-+static inline int kdbus_conn_is_ordinary(const struct kdbus_conn *conn)
-+{
-+	return !(conn->flags & KDBUS_HELLO_SPECIAL_CONN);
-+}
-+
-+/**
-+ * kdbus_conn_is_activator() - Check if connection is an activator
-+ * @conn:		The connection to check
-+ *
-+ * Return: Non-zero if the connection is an activator
-+ */
-+static inline int kdbus_conn_is_activator(const struct kdbus_conn *conn)
-+{
-+	return conn->flags & KDBUS_HELLO_ACTIVATOR;
-+}
-+
-+/**
-+ * kdbus_conn_is_policy_holder() - Check if connection is a policy holder
-+ * @conn:		The connection to check
-+ *
-+ * Return: Non-zero if the connection is a policy holder
-+ */
-+static inline int kdbus_conn_is_policy_holder(const struct kdbus_conn *conn)
-+{
-+	return conn->flags & KDBUS_HELLO_POLICY_HOLDER;
-+}
-+
-+/**
-+ * kdbus_conn_is_monitor() - Check if connection is a monitor
-+ * @conn:		The connection to check
-+ *
-+ * Return: Non-zero if the connection is a monitor
-+ */
-+static inline int kdbus_conn_is_monitor(const struct kdbus_conn *conn)
-+{
-+	return conn->flags & KDBUS_HELLO_MONITOR;
-+}
-+
-+/**
-+ * kdbus_conn_lock2() - Lock two connections
-+ * @a:		connection A to lock or NULL
-+ * @b:		connection B to lock or NULL
-+ *
-+ * Lock two connections at once. As we need to have a stable locking order, we
-+ * always lock the connection with lower memory address first.
-+ */
-+static inline void kdbus_conn_lock2(struct kdbus_conn *a, struct kdbus_conn *b)
-+{
-+	if (a < b) {
-+		if (a)
-+			mutex_lock(&a->lock);
-+		if (b && b != a)
-+			mutex_lock_nested(&b->lock, !!a);
-+	} else {
-+		if (b)
-+			mutex_lock(&b->lock);
-+		if (a && a != b)
-+			mutex_lock_nested(&a->lock, !!b);
-+	}
-+}
-+
-+/**
-+ * kdbus_conn_unlock2() - Unlock two connections
-+ * @a:		connection A to unlock or NULL
-+ * @b:		connection B to unlock or NULL
-+ *
-+ * Unlock two connections at once. See kdbus_conn_lock2().
-+ */
-+static inline void kdbus_conn_unlock2(struct kdbus_conn *a,
-+				      struct kdbus_conn *b)
-+{
-+	if (a)
-+		mutex_unlock(&a->lock);
-+	if (b && b != a)
-+		mutex_unlock(&b->lock);
-+}
-+
-+/**
-+ * kdbus_conn_assert_active() - lockdep assert on active lock
-+ * @conn:	connection that shall be active
-+ *
-+ * This verifies via lockdep that the caller holds an active reference to the
-+ * given connection.
-+ */
-+static inline void kdbus_conn_assert_active(struct kdbus_conn *conn)
-+{
-+	lockdep_assert_held(conn);
-+}
-+
-+#endif
-diff --git a/ipc/kdbus/domain.c b/ipc/kdbus/domain.c
-new file mode 100644
-index 0000000..ac9f760
---- /dev/null
-+++ b/ipc/kdbus/domain.c
-@@ -0,0 +1,296 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ * Copyright (C) 2014-2015 Djalal Harouni <tixxdz@××××××.org>
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#include <linux/fs.h>
-+#include <linux/idr.h>
-+#include <linux/init.h>
-+#include <linux/module.h>
-+#include <linux/sched.h>
-+#include <linux/sizes.h>
-+#include <linux/slab.h>
-+#include <linux/uaccess.h>
-+
-+#include "bus.h"
-+#include "domain.h"
-+#include "handle.h"
-+#include "item.h"
-+#include "limits.h"
-+#include "util.h"
-+
-+static void kdbus_domain_control_free(struct kdbus_node *node)
-+{
-+	kfree(node);
-+}
-+
-+static struct kdbus_node *kdbus_domain_control_new(struct kdbus_domain *domain,
-+						   unsigned int access)
-+{
-+	struct kdbus_node *node;
-+	int ret;
-+
-+	node = kzalloc(sizeof(*node), GFP_KERNEL);
-+	if (!node)
-+		return ERR_PTR(-ENOMEM);
-+
-+	kdbus_node_init(node, KDBUS_NODE_CONTROL);
-+
-+	node->free_cb = kdbus_domain_control_free;
-+	node->mode = domain->node.mode;
-+	node->mode = S_IRUSR | S_IWUSR;
-+	if (access & (KDBUS_MAKE_ACCESS_GROUP | KDBUS_MAKE_ACCESS_WORLD))
-+		node->mode |= S_IRGRP | S_IWGRP;
-+	if (access & KDBUS_MAKE_ACCESS_WORLD)
-+		node->mode |= S_IROTH | S_IWOTH;
-+
-+	ret = kdbus_node_link(node, &domain->node, "control");
-+	if (ret < 0)
-+		goto exit_free;
-+
-+	return node;
-+
-+exit_free:
-+	kdbus_node_deactivate(node);
-+	kdbus_node_unref(node);
-+	return ERR_PTR(ret);
-+}
-+
-+static void kdbus_domain_free(struct kdbus_node *node)
-+{
-+	struct kdbus_domain *domain =
-+		container_of(node, struct kdbus_domain, node);
-+
-+	put_user_ns(domain->user_namespace);
-+	ida_destroy(&domain->user_ida);
-+	idr_destroy(&domain->user_idr);
-+	kfree(domain);
-+}
-+
-+/**
-+ * kdbus_domain_new() - create a new domain
-+ * @access:		The access mode for this node (KDBUS_MAKE_ACCESS_*)
-+ *
-+ * Return: a new kdbus_domain on success, ERR_PTR on failure
-+ */
-+struct kdbus_domain *kdbus_domain_new(unsigned int access)
-+{
-+	struct kdbus_domain *d;
-+	int ret;
-+
-+	d = kzalloc(sizeof(*d), GFP_KERNEL);
-+	if (!d)
-+		return ERR_PTR(-ENOMEM);
-+
-+	kdbus_node_init(&d->node, KDBUS_NODE_DOMAIN);
-+
-+	d->node.free_cb = kdbus_domain_free;
-+	d->node.mode = S_IRUSR | S_IXUSR;
-+	if (access & (KDBUS_MAKE_ACCESS_GROUP | KDBUS_MAKE_ACCESS_WORLD))
-+		d->node.mode |= S_IRGRP | S_IXGRP;
-+	if (access & KDBUS_MAKE_ACCESS_WORLD)
-+		d->node.mode |= S_IROTH | S_IXOTH;
-+
-+	mutex_init(&d->lock);
-+	idr_init(&d->user_idr);
-+	ida_init(&d->user_ida);
-+
-+	/* Pin user namespace so we can guarantee domain-unique bus * names. */
-+	d->user_namespace = get_user_ns(current_user_ns());
-+
-+	ret = kdbus_node_link(&d->node, NULL, NULL);
-+	if (ret < 0)
-+		goto exit_unref;
-+
-+	return d;
-+
-+exit_unref:
-+	kdbus_node_deactivate(&d->node);
-+	kdbus_node_unref(&d->node);
-+	return ERR_PTR(ret);
-+}
-+
-+/**
-+ * kdbus_domain_ref() - take a domain reference
-+ * @domain:		Domain
-+ *
-+ * Return: the domain itself
-+ */
-+struct kdbus_domain *kdbus_domain_ref(struct kdbus_domain *domain)
-+{
-+	if (domain)
-+		kdbus_node_ref(&domain->node);
-+	return domain;
-+}
-+
-+/**
-+ * kdbus_domain_unref() - drop a domain reference
-+ * @domain:		Domain
-+ *
-+ * When the last reference is dropped, the domain internal structure
-+ * is freed.
-+ *
-+ * Return: NULL
-+ */
-+struct kdbus_domain *kdbus_domain_unref(struct kdbus_domain *domain)
-+{
-+	if (domain)
-+		kdbus_node_unref(&domain->node);
-+	return NULL;
-+}
-+
-+/**
-+ * kdbus_domain_populate() - populate static domain nodes
-+ * @domain:	domain to populate
-+ * @access:	KDBUS_MAKE_ACCESS_* access restrictions for new nodes
-+ *
-+ * Allocate and activate static sub-nodes of the given domain. This will fail if
-+ * you call it on a non-active node or if the domain was already populated.
-+ *
-+ * Return: 0 on success, negative error code on failure.
-+ */
-+int kdbus_domain_populate(struct kdbus_domain *domain, unsigned int access)
-+{
-+	struct kdbus_node *control;
-+
-+	/*
-+	 * Create a control-node for this domain. We drop our own reference
-+	 * immediately, effectively causing the node to be deactivated and
-+	 * released when the parent domain is.
-+	 */
-+	control = kdbus_domain_control_new(domain, access);
-+	if (IS_ERR(control))
-+		return PTR_ERR(control);
-+
-+	kdbus_node_activate(control);
-+	kdbus_node_unref(control);
-+	return 0;
-+}
-+
-+/**
-+ * kdbus_user_lookup() - lookup a kdbus_user object
-+ * @domain:		domain of the user
-+ * @uid:		uid of the user; INVALID_UID for an anon user
-+ *
-+ * Lookup the kdbus user accounting object for the given domain. If INVALID_UID
-+ * is passed, a new anonymous user is created which is private to the caller.
-+ *
-+ * Return: The user object is returned, ERR_PTR on failure.
-+ */
-+struct kdbus_user *kdbus_user_lookup(struct kdbus_domain *domain, kuid_t uid)
-+{
-+	struct kdbus_user *u = NULL, *old = NULL;
-+	int ret;
-+
-+	mutex_lock(&domain->lock);
-+
-+	if (uid_valid(uid)) {
-+		old = idr_find(&domain->user_idr, __kuid_val(uid));
-+		/*
-+		 * If the object is about to be destroyed, ignore it and
-+		 * replace the slot in the IDR later on.
-+		 */
-+		if (old && kref_get_unless_zero(&old->kref)) {
-+			mutex_unlock(&domain->lock);
-+			return old;
-+		}
-+	}
-+
-+	u = kzalloc(sizeof(*u), GFP_KERNEL);
-+	if (!u) {
-+		ret = -ENOMEM;
-+		goto exit;
-+	}
-+
-+	kref_init(&u->kref);
-+	u->domain = kdbus_domain_ref(domain);
-+	u->uid = uid;
-+	atomic_set(&u->buses, 0);
-+	atomic_set(&u->connections, 0);
-+
-+	if (uid_valid(uid)) {
-+		if (old) {
-+			idr_replace(&domain->user_idr, u, __kuid_val(uid));
-+			old->uid = INVALID_UID; /* mark old as removed */
-+		} else {
-+			ret = idr_alloc(&domain->user_idr, u, __kuid_val(uid),
-+					__kuid_val(uid) + 1, GFP_KERNEL);
-+			if (ret < 0)
-+				goto exit;
-+		}
-+	}
-+
-+	/*
-+	 * Allocate the smallest possible index for this user; used
-+	 * in arrays for accounting user quota in receiver queues.
-+	 */
-+	ret = ida_simple_get(&domain->user_ida, 1, 0, GFP_KERNEL);
-+	if (ret < 0)
-+		goto exit;
-+
-+	u->id = ret;
-+	mutex_unlock(&domain->lock);
-+	return u;
-+
-+exit:
-+	if (u) {
-+		if (uid_valid(u->uid))
-+			idr_remove(&domain->user_idr, __kuid_val(u->uid));
-+		kdbus_domain_unref(u->domain);
-+		kfree(u);
-+	}
-+	mutex_unlock(&domain->lock);
-+	return ERR_PTR(ret);
-+}
-+
-+static void __kdbus_user_free(struct kref *kref)
-+{
-+	struct kdbus_user *user = container_of(kref, struct kdbus_user, kref);
-+
-+	WARN_ON(atomic_read(&user->buses) > 0);
-+	WARN_ON(atomic_read(&user->connections) > 0);
-+
-+	mutex_lock(&user->domain->lock);
-+	ida_simple_remove(&user->domain->user_ida, user->id);
-+	if (uid_valid(user->uid))
-+		idr_remove(&user->domain->user_idr, __kuid_val(user->uid));
-+	mutex_unlock(&user->domain->lock);
-+
-+	kdbus_domain_unref(user->domain);
-+	kfree(user);
-+}
-+
-+/**
-+ * kdbus_user_ref() - take a user reference
-+ * @u:		User
-+ *
-+ * Return: @u is returned
-+ */
-+struct kdbus_user *kdbus_user_ref(struct kdbus_user *u)
-+{
-+	if (u)
-+		kref_get(&u->kref);
-+	return u;
-+}
-+
-+/**
-+ * kdbus_user_unref() - drop a user reference
-+ * @u:		User
-+ *
-+ * Return: NULL
-+ */
-+struct kdbus_user *kdbus_user_unref(struct kdbus_user *u)
-+{
-+	if (u)
-+		kref_put(&u->kref, __kdbus_user_free);
-+	return NULL;
-+}
-diff --git a/ipc/kdbus/domain.h b/ipc/kdbus/domain.h
-new file mode 100644
-index 0000000..447a2bd
---- /dev/null
-+++ b/ipc/kdbus/domain.h
-@@ -0,0 +1,77 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ * Copyright (C) 2014-2015 Djalal Harouni <tixxdz@××××××.org>
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#ifndef __KDBUS_DOMAIN_H
-+#define __KDBUS_DOMAIN_H
-+
-+#include <linux/fs.h>
-+#include <linux/idr.h>
-+#include <linux/kref.h>
-+#include <linux/user_namespace.h>
-+
-+#include "node.h"
-+
-+/**
-+ * struct kdbus_domain - domain for buses
-+ * @node:		Underlying API node
-+ * @lock:		Domain data lock
-+ * @last_id:		Last used object id
-+ * @user_idr:		Set of all users indexed by UID
-+ * @user_ida:		Set of all users to compute small indices
-+ * @user_namespace:	User namespace, pinned at creation time
-+ * @dentry:		Root dentry of VFS mount (don't use outside of kdbusfs)
-+ */
-+struct kdbus_domain {
-+	struct kdbus_node node;
-+	struct mutex lock;
-+	atomic64_t last_id;
-+	struct idr user_idr;
-+	struct ida user_ida;
-+	struct user_namespace *user_namespace;
-+	struct dentry *dentry;
-+};
-+
-+/**
-+ * struct kdbus_user - resource accounting for users
-+ * @kref:		Reference counter
-+ * @domain:		Domain of the user
-+ * @id:			Index of this user
-+ * @uid:		UID of the user
-+ * @buses:		Number of buses the user has created
-+ * @connections:	Number of connections the user has created
-+ */
-+struct kdbus_user {
-+	struct kref kref;
-+	struct kdbus_domain *domain;
-+	unsigned int id;
-+	kuid_t uid;
-+	atomic_t buses;
-+	atomic_t connections;
-+};
-+
-+#define kdbus_domain_from_node(_node) \
-+	container_of((_node), struct kdbus_domain, node)
-+
-+struct kdbus_domain *kdbus_domain_new(unsigned int access);
-+struct kdbus_domain *kdbus_domain_ref(struct kdbus_domain *domain);
-+struct kdbus_domain *kdbus_domain_unref(struct kdbus_domain *domain);
-+int kdbus_domain_populate(struct kdbus_domain *domain, unsigned int access);
-+
-+#define KDBUS_USER_KERNEL_ID 0 /* ID 0 is reserved for kernel accounting */
-+
-+struct kdbus_user *kdbus_user_lookup(struct kdbus_domain *domain, kuid_t uid);
-+struct kdbus_user *kdbus_user_ref(struct kdbus_user *u);
-+struct kdbus_user *kdbus_user_unref(struct kdbus_user *u);
-+
-+#endif
-diff --git a/ipc/kdbus/endpoint.c b/ipc/kdbus/endpoint.c
-new file mode 100644
-index 0000000..44e7a20
---- /dev/null
-+++ b/ipc/kdbus/endpoint.c
-@@ -0,0 +1,303 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ * Copyright (C) 2014-2015 Djalal Harouni <tixxdz@××××××.org>
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#include <linux/fs.h>
-+#include <linux/idr.h>
-+#include <linux/init.h>
-+#include <linux/module.h>
-+#include <linux/sched.h>
-+#include <linux/sizes.h>
-+#include <linux/slab.h>
-+#include <linux/uaccess.h>
-+#include <linux/uio.h>
-+
-+#include "bus.h"
-+#include "connection.h"
-+#include "domain.h"
-+#include "endpoint.h"
-+#include "handle.h"
-+#include "item.h"
-+#include "message.h"
-+#include "policy.h"
-+
-+static void kdbus_ep_free(struct kdbus_node *node)
-+{
-+	struct kdbus_ep *ep = container_of(node, struct kdbus_ep, node);
-+
-+	WARN_ON(!list_empty(&ep->conn_list));
-+
-+	kdbus_policy_db_clear(&ep->policy_db);
-+	kdbus_bus_unref(ep->bus);
-+	kdbus_user_unref(ep->user);
-+	kfree(ep);
-+}
-+
-+static void kdbus_ep_release(struct kdbus_node *node, bool was_active)
-+{
-+	struct kdbus_ep *ep = container_of(node, struct kdbus_ep, node);
-+
-+	/* disconnect all connections to this endpoint */
-+	for (;;) {
-+		struct kdbus_conn *conn;
-+
-+		mutex_lock(&ep->lock);
-+		conn = list_first_entry_or_null(&ep->conn_list,
-+						struct kdbus_conn,
-+						ep_entry);
-+		if (!conn) {
-+			mutex_unlock(&ep->lock);
-+			break;
-+		}
-+
-+		/* take reference, release lock, disconnect without lock */
-+		kdbus_conn_ref(conn);
-+		mutex_unlock(&ep->lock);
-+
-+		kdbus_conn_disconnect(conn, false);
-+		kdbus_conn_unref(conn);
-+	}
-+}
-+
-+/**
-+ * kdbus_ep_new() - create a new endpoint
-+ * @bus:		The bus this endpoint will be created for
-+ * @name:		The name of the endpoint
-+ * @access:		The access flags for this node (KDBUS_MAKE_ACCESS_*)
-+ * @uid:		The uid of the node
-+ * @gid:		The gid of the node
-+ * @is_custom:		Whether this is a custom endpoint
-+ *
-+ * This function will create a new endpoint with the given
-+ * name and properties for a given bus.
-+ *
-+ * Return: a new kdbus_ep on success, ERR_PTR on failure.
-+ */
-+struct kdbus_ep *kdbus_ep_new(struct kdbus_bus *bus, const char *name,
-+			      unsigned int access, kuid_t uid, kgid_t gid,
-+			      bool is_custom)
-+{
-+	struct kdbus_ep *e;
-+	int ret;
-+
-+	/*
-+	 * Validate only custom endpoints names, default endpoints
-+	 * with a "bus" name are created when the bus is created
-+	 */
-+	if (is_custom) {
-+		ret = kdbus_verify_uid_prefix(name, bus->domain->user_namespace,
-+					      uid);
-+		if (ret < 0)
-+			return ERR_PTR(ret);
-+	}
-+
-+	e = kzalloc(sizeof(*e), GFP_KERNEL);
-+	if (!e)
-+		return ERR_PTR(-ENOMEM);
-+
-+	kdbus_node_init(&e->node, KDBUS_NODE_ENDPOINT);
-+
-+	e->node.free_cb = kdbus_ep_free;
-+	e->node.release_cb = kdbus_ep_release;
-+	e->node.uid = uid;
-+	e->node.gid = gid;
-+	e->node.mode = S_IRUSR | S_IWUSR;
-+	if (access & (KDBUS_MAKE_ACCESS_GROUP | KDBUS_MAKE_ACCESS_WORLD))
-+		e->node.mode |= S_IRGRP | S_IWGRP;
-+	if (access & KDBUS_MAKE_ACCESS_WORLD)
-+		e->node.mode |= S_IROTH | S_IWOTH;
-+
-+	mutex_init(&e->lock);
-+	INIT_LIST_HEAD(&e->conn_list);
-+	kdbus_policy_db_init(&e->policy_db);
-+	e->bus = kdbus_bus_ref(bus);
-+
-+	ret = kdbus_node_link(&e->node, &bus->node, name);
-+	if (ret < 0)
-+		goto exit_unref;
-+
-+	/*
-+	 * Transactions on custom endpoints are never accounted on the global
-+	 * user limits. Instead, for each custom endpoint, we create a custom,
-+	 * unique user, which all transactions are accounted on. Regardless of
-+	 * the user using that endpoint, it is always accounted on the same
-+	 * user-object. This budget is not shared with ordinary users on
-+	 * non-custom endpoints.
-+	 */
-+	if (is_custom) {
-+		e->user = kdbus_user_lookup(bus->domain, INVALID_UID);
-+		if (IS_ERR(e->user)) {
-+			ret = PTR_ERR(e->user);
-+			e->user = NULL;
-+			goto exit_unref;
-+		}
-+	}
-+
-+	return e;
-+
-+exit_unref:
-+	kdbus_node_deactivate(&e->node);
-+	kdbus_node_unref(&e->node);
-+	return ERR_PTR(ret);
-+}
-+
-+/**
-+ * kdbus_ep_ref() - increase the reference counter of a kdbus_ep
-+ * @ep:			The endpoint to reference
-+ *
-+ * Every user of an endpoint, except for its creator, must add a reference to
-+ * the kdbus_ep instance using this function.
-+ *
-+ * Return: the ep itself
-+ */
-+struct kdbus_ep *kdbus_ep_ref(struct kdbus_ep *ep)
-+{
-+	if (ep)
-+		kdbus_node_ref(&ep->node);
-+	return ep;
-+}
-+
-+/**
-+ * kdbus_ep_unref() - decrease the reference counter of a kdbus_ep
-+ * @ep:		The ep to unref
-+ *
-+ * Release a reference. If the reference count drops to 0, the ep will be
-+ * freed.
-+ *
-+ * Return: NULL
-+ */
-+struct kdbus_ep *kdbus_ep_unref(struct kdbus_ep *ep)
-+{
-+	if (ep)
-+		kdbus_node_unref(&ep->node);
-+	return NULL;
-+}
-+
-+/**
-+ * kdbus_ep_is_privileged() - check whether a file is privileged
-+ * @ep:		endpoint to operate on
-+ * @file:	file to test
-+ *
-+ * Return: True if @file is privileged in the domain of @ep.
-+ */
-+bool kdbus_ep_is_privileged(struct kdbus_ep *ep, struct file *file)
-+{
-+	return !ep->user &&
-+		file_ns_capable(file, ep->bus->domain->user_namespace,
-+				CAP_IPC_OWNER);
-+}
-+
-+/**
-+ * kdbus_ep_is_owner() - check whether a file should be treated as bus owner
-+ * @ep:		endpoint to operate on
-+ * @file:	file to test
-+ *
-+ * Return: True if @file should be treated as bus owner on @ep
-+ */
-+bool kdbus_ep_is_owner(struct kdbus_ep *ep, struct file *file)
-+{
-+	return !ep->user &&
-+		(uid_eq(file->f_cred->euid, ep->bus->node.uid) ||
-+		 kdbus_ep_is_privileged(ep, file));
-+}
-+
-+/**
-+ * kdbus_cmd_ep_make() - handle KDBUS_CMD_ENDPOINT_MAKE
-+ * @bus:		bus to operate on
-+ * @argp:		command payload
-+ *
-+ * Return: NULL or newly created endpoint on success, ERR_PTR on failure.
-+ */
-+struct kdbus_ep *kdbus_cmd_ep_make(struct kdbus_bus *bus, void __user *argp)
-+{
-+	const char *item_make_name;
-+	struct kdbus_ep *ep = NULL;
-+	struct kdbus_cmd *cmd;
-+	int ret;
-+
-+	struct kdbus_arg argv[] = {
-+		{ .type = KDBUS_ITEM_NEGOTIATE },
-+		{ .type = KDBUS_ITEM_MAKE_NAME, .mandatory = true },
-+	};
-+	struct kdbus_args args = {
-+		.allowed_flags = KDBUS_FLAG_NEGOTIATE |
-+				 KDBUS_MAKE_ACCESS_GROUP |
-+				 KDBUS_MAKE_ACCESS_WORLD,
-+		.argv = argv,
-+		.argc = ARRAY_SIZE(argv),
-+	};
-+
-+	ret = kdbus_args_parse(&args, argp, &cmd);
-+	if (ret < 0)
-+		return ERR_PTR(ret);
-+	if (ret > 0)
-+		return NULL;
-+
-+	item_make_name = argv[1].item->str;
-+
-+	ep = kdbus_ep_new(bus, item_make_name, cmd->flags,
-+			  current_euid(), current_egid(), true);
-+	if (IS_ERR(ep)) {
-+		ret = PTR_ERR(ep);
-+		ep = NULL;
-+		goto exit;
-+	}
-+
-+	if (!kdbus_node_activate(&ep->node)) {
-+		ret = -ESHUTDOWN;
-+		goto exit;
-+	}
-+
-+exit:
-+	ret = kdbus_args_clear(&args, ret);
-+	if (ret < 0) {
-+		if (ep) {
-+			kdbus_node_deactivate(&ep->node);
-+			kdbus_ep_unref(ep);
-+		}
-+		return ERR_PTR(ret);
-+	}
-+	return ep;
-+}
-+
-+/**
-+ * kdbus_cmd_ep_update() - handle KDBUS_CMD_ENDPOINT_UPDATE
-+ * @ep:			endpoint to operate on
-+ * @argp:		command payload
-+ *
-+ * Return: >=0 on success, negative error code on failure.
-+ */
-+int kdbus_cmd_ep_update(struct kdbus_ep *ep, void __user *argp)
-+{
-+	struct kdbus_cmd *cmd;
-+	int ret;
-+
-+	struct kdbus_arg argv[] = {
-+		{ .type = KDBUS_ITEM_NEGOTIATE },
-+		{ .type = KDBUS_ITEM_NAME, .multiple = true },
-+		{ .type = KDBUS_ITEM_POLICY_ACCESS, .multiple = true },
-+	};
-+	struct kdbus_args args = {
-+		.allowed_flags = KDBUS_FLAG_NEGOTIATE,
-+		.argv = argv,
-+		.argc = ARRAY_SIZE(argv),
-+	};
-+
-+	ret = kdbus_args_parse(&args, argp, &cmd);
-+	if (ret != 0)
-+		return ret;
-+
-+	ret = kdbus_policy_set(&ep->policy_db, args.items, args.items_size,
-+			       0, true, ep);
-+	return kdbus_args_clear(&args, ret);
-+}
-diff --git a/ipc/kdbus/endpoint.h b/ipc/kdbus/endpoint.h
-new file mode 100644
-index 0000000..e0da59f
---- /dev/null
-+++ b/ipc/kdbus/endpoint.h
-@@ -0,0 +1,70 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ * Copyright (C) 2014-2015 Djalal Harouni <tixxdz@××××××.org>
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#ifndef __KDBUS_ENDPOINT_H
-+#define __KDBUS_ENDPOINT_H
-+
-+#include <linux/list.h>
-+#include <linux/mutex.h>
-+#include <linux/uidgid.h>
-+#include "node.h"
-+#include "policy.h"
-+
-+struct kdbus_bus;
-+struct kdbus_user;
-+
-+/**
-+ * struct kdbus_ep - endpoint to access a bus
-+ * @node:		The kdbus node
-+ * @lock:		Endpoint data lock
-+ * @bus:		Bus behind this endpoint
-+ * @user:		Custom enpoints account against an anonymous user
-+ * @policy_db:		Uploaded policy
-+ * @conn_list:		Connections of this endpoint
-+ *
-+ * An endpoint offers access to a bus; the default endpoint node name is "bus".
-+ * Additional custom endpoints to the same bus can be created and they can
-+ * carry their own policies/filters.
-+ */
-+struct kdbus_ep {
-+	struct kdbus_node node;
-+	struct mutex lock;
-+
-+	/* static */
-+	struct kdbus_bus *bus;
-+	struct kdbus_user *user;
-+
-+	/* protected by own locks */
-+	struct kdbus_policy_db policy_db;
-+
-+	/* protected by ep->lock */
-+	struct list_head conn_list;
-+};
-+
-+#define kdbus_ep_from_node(_node) \
-+	container_of((_node), struct kdbus_ep, node)
-+
-+struct kdbus_ep *kdbus_ep_new(struct kdbus_bus *bus, const char *name,
-+			      unsigned int access, kuid_t uid, kgid_t gid,
-+			      bool policy);
-+struct kdbus_ep *kdbus_ep_ref(struct kdbus_ep *ep);
-+struct kdbus_ep *kdbus_ep_unref(struct kdbus_ep *ep);
-+
-+bool kdbus_ep_is_privileged(struct kdbus_ep *ep, struct file *file);
-+bool kdbus_ep_is_owner(struct kdbus_ep *ep, struct file *file);
-+
-+struct kdbus_ep *kdbus_cmd_ep_make(struct kdbus_bus *bus, void __user *argp);
-+int kdbus_cmd_ep_update(struct kdbus_ep *ep, void __user *argp);
-+
-+#endif
-diff --git a/ipc/kdbus/fs.c b/ipc/kdbus/fs.c
-new file mode 100644
-index 0000000..09c4809
---- /dev/null
-+++ b/ipc/kdbus/fs.c
-@@ -0,0 +1,508 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#include <linux/dcache.h>
-+#include <linux/fs.h>
-+#include <linux/fsnotify.h>
-+#include <linux/init.h>
-+#include <linux/ipc_namespace.h>
-+#include <linux/magic.h>
-+#include <linux/module.h>
-+#include <linux/mount.h>
-+#include <linux/mutex.h>
-+#include <linux/namei.h>
-+#include <linux/pagemap.h>
-+#include <linux/sched.h>
-+#include <linux/slab.h>
-+
-+#include "bus.h"
-+#include "domain.h"
-+#include "endpoint.h"
-+#include "fs.h"
-+#include "handle.h"
-+#include "node.h"
-+
-+#define kdbus_node_from_dentry(_dentry) \
-+	((struct kdbus_node *)(_dentry)->d_fsdata)
-+
-+static struct inode *fs_inode_get(struct super_block *sb,
-+				  struct kdbus_node *node);
-+
-+/*
-+ * Directory Management
-+ */
-+
-+static inline unsigned char kdbus_dt_type(struct kdbus_node *node)
-+{
-+	switch (node->type) {
-+	case KDBUS_NODE_DOMAIN:
-+	case KDBUS_NODE_BUS:
-+		return DT_DIR;
-+	case KDBUS_NODE_CONTROL:
-+	case KDBUS_NODE_ENDPOINT:
-+		return DT_REG;
-+	}
-+
-+	return DT_UNKNOWN;
-+}
-+
-+static int fs_dir_fop_iterate(struct file *file, struct dir_context *ctx)
-+{
-+	struct dentry *dentry = file->f_path.dentry;
-+	struct kdbus_node *parent = kdbus_node_from_dentry(dentry);
-+	struct kdbus_node *old, *next = file->private_data;
-+
-+	/*
-+	 * kdbusfs directory iterator (modelled after sysfs/kernfs)
-+	 * When iterating kdbusfs directories, we iterate all children of the
-+	 * parent kdbus_node object. We use ctx->pos to store the hash of the
-+	 * child and file->private_data to store a reference to the next node
-+	 * object. If ctx->pos is not modified via llseek while you iterate a
-+	 * directory, then we use the file->private_data node pointer to
-+	 * directly access the next node in the tree.
-+	 * However, if you directly seek on the directory, we have to find the
-+	 * closest node to that position and cannot use our node pointer. This
-+	 * means iterating the rb-tree to find the closest match and start over
-+	 * from there.
-+	 * Note that hash values are not necessarily unique. Therefore, llseek
-+	 * is not guaranteed to seek to the same node that you got when you
-+	 * retrieved the position. Seeking to 0, 1, 2 and >=INT_MAX is safe,
-+	 * though. We could use the inode-number as position, but this would
-+	 * require another rb-tree for fast access. Kernfs and others already
-+	 * ignore those conflicts, so we should be fine, too.
-+	 */
-+
-+	if (!dir_emit_dots(file, ctx))
-+		return 0;
-+
-+	/* acquire @next; if deactivated, or seek detected, find next node */
-+	old = next;
-+	if (next && ctx->pos == next->hash) {
-+		if (kdbus_node_acquire(next))
-+			kdbus_node_ref(next);
-+		else
-+			next = kdbus_node_next_child(parent, next);
-+	} else {
-+		next = kdbus_node_find_closest(parent, ctx->pos);
-+	}
-+	kdbus_node_unref(old);
-+
-+	while (next) {
-+		/* emit @next */
-+		file->private_data = next;
-+		ctx->pos = next->hash;
-+
-+		kdbus_node_release(next);
-+
-+		if (!dir_emit(ctx, next->name, strlen(next->name), next->id,
-+			      kdbus_dt_type(next)))
-+			return 0;
-+
-+		/* find next node after @next */
-+		old = next;
-+		next = kdbus_node_next_child(parent, next);
-+		kdbus_node_unref(old);
-+	}
-+
-+	file->private_data = NULL;
-+	ctx->pos = INT_MAX;
-+
-+	return 0;
-+}
-+
-+static loff_t fs_dir_fop_llseek(struct file *file, loff_t offset, int whence)
-+{
-+	struct inode *inode = file_inode(file);
-+	loff_t ret;
-+
-+	/* protect f_off against fop_iterate */
-+	mutex_lock(&inode->i_mutex);
-+	ret = generic_file_llseek(file, offset, whence);
-+	mutex_unlock(&inode->i_mutex);
-+
-+	return ret;
-+}
-+
-+static int fs_dir_fop_release(struct inode *inode, struct file *file)
-+{
-+	kdbus_node_unref(file->private_data);
-+	return 0;
-+}
-+
-+static const struct file_operations fs_dir_fops = {
-+	.read		= generic_read_dir,
-+	.iterate	= fs_dir_fop_iterate,
-+	.llseek		= fs_dir_fop_llseek,
-+	.release	= fs_dir_fop_release,
-+};
-+
-+static struct dentry *fs_dir_iop_lookup(struct inode *dir,
-+					struct dentry *dentry,
-+					unsigned int flags)
-+{
-+	struct dentry *dnew = NULL;
-+	struct kdbus_node *parent;
-+	struct kdbus_node *node;
-+	struct inode *inode;
-+
-+	parent = kdbus_node_from_dentry(dentry->d_parent);
-+	if (!kdbus_node_acquire(parent))
-+		return NULL;
-+
-+	/* returns reference to _acquired_ child node */
-+	node = kdbus_node_find_child(parent, dentry->d_name.name);
-+	if (node) {
-+		dentry->d_fsdata = node;
-+		inode = fs_inode_get(dir->i_sb, node);
-+		if (IS_ERR(inode))
-+			dnew = ERR_CAST(inode);
-+		else
-+			dnew = d_splice_alias(inode, dentry);
-+
-+		kdbus_node_release(node);
-+	}
-+
-+	kdbus_node_release(parent);
-+	return dnew;
-+}
-+
-+static const struct inode_operations fs_dir_iops = {
-+	.permission	= generic_permission,
-+	.lookup		= fs_dir_iop_lookup,
-+};
-+
-+/*
-+ * Inode Management
-+ */
-+
-+static const struct inode_operations fs_inode_iops = {
-+	.permission	= generic_permission,
-+};
-+
-+static struct inode *fs_inode_get(struct super_block *sb,
-+				  struct kdbus_node *node)
-+{
-+	struct inode *inode;
-+
-+	inode = iget_locked(sb, node->id);
-+	if (!inode)
-+		return ERR_PTR(-ENOMEM);
-+	if (!(inode->i_state & I_NEW))
-+		return inode;
-+
-+	inode->i_private = kdbus_node_ref(node);
-+	inode->i_mapping->a_ops = &empty_aops;
-+	inode->i_mode = node->mode & S_IALLUGO;
-+	inode->i_atime = inode->i_ctime = inode->i_mtime = CURRENT_TIME;
-+	inode->i_uid = node->uid;
-+	inode->i_gid = node->gid;
-+
-+	switch (node->type) {
-+	case KDBUS_NODE_DOMAIN:
-+	case KDBUS_NODE_BUS:
-+		inode->i_mode |= S_IFDIR;
-+		inode->i_op = &fs_dir_iops;
-+		inode->i_fop = &fs_dir_fops;
-+		set_nlink(inode, 2);
-+		break;
-+	case KDBUS_NODE_CONTROL:
-+	case KDBUS_NODE_ENDPOINT:
-+		inode->i_mode |= S_IFREG;
-+		inode->i_op = &fs_inode_iops;
-+		inode->i_fop = &kdbus_handle_ops;
-+		break;
-+	}
-+
-+	unlock_new_inode(inode);
-+
-+	return inode;
-+}
-+
-+/*
-+ * Superblock Management
-+ */
-+
-+static int fs_super_dop_revalidate(struct dentry *dentry, unsigned int flags)
-+{
-+	struct kdbus_node *node;
-+
-+	/* Force lookup on negatives */
-+	if (!dentry->d_inode)
-+		return 0;
-+
-+	node = kdbus_node_from_dentry(dentry);
-+
-+	/* see whether the node has been removed */
-+	if (!kdbus_node_is_active(node))
-+		return 0;
-+
-+	return 1;
-+}
-+
-+static void fs_super_dop_release(struct dentry *dentry)
-+{
-+	kdbus_node_unref(dentry->d_fsdata);
-+}
-+
-+static const struct dentry_operations fs_super_dops = {
-+	.d_revalidate	= fs_super_dop_revalidate,
-+	.d_release	= fs_super_dop_release,
-+};
-+
-+static void fs_super_sop_evict_inode(struct inode *inode)
-+{
-+	struct kdbus_node *node = kdbus_node_from_inode(inode);
-+
-+	truncate_inode_pages_final(&inode->i_data);
-+	clear_inode(inode);
-+	kdbus_node_unref(node);
-+}
-+
-+static const struct super_operations fs_super_sops = {
-+	.statfs		= simple_statfs,
-+	.drop_inode	= generic_delete_inode,
-+	.evict_inode	= fs_super_sop_evict_inode,
-+};
-+
-+static int fs_super_fill(struct super_block *sb)
-+{
-+	struct kdbus_domain *domain = sb->s_fs_info;
-+	struct inode *inode;
-+	int ret;
-+
-+	sb->s_blocksize = PAGE_CACHE_SIZE;
-+	sb->s_blocksize_bits = PAGE_CACHE_SHIFT;
-+	sb->s_magic = KDBUS_SUPER_MAGIC;
-+	sb->s_maxbytes = MAX_LFS_FILESIZE;
-+	sb->s_op = &fs_super_sops;
-+	sb->s_time_gran = 1;
-+
-+	inode = fs_inode_get(sb, &domain->node);
-+	if (IS_ERR(inode))
-+		return PTR_ERR(inode);
-+
-+	sb->s_root = d_make_root(inode);
-+	if (!sb->s_root) {
-+		/* d_make_root iput()s the inode on failure */
-+		return -ENOMEM;
-+	}
-+
-+	/* sb holds domain reference */
-+	sb->s_root->d_fsdata = &domain->node;
-+	sb->s_d_op = &fs_super_dops;
-+
-+	/* sb holds root reference */
-+	domain->dentry = sb->s_root;
-+
-+	if (!kdbus_node_activate(&domain->node))
-+		return -ESHUTDOWN;
-+
-+	ret = kdbus_domain_populate(domain, KDBUS_MAKE_ACCESS_WORLD);
-+	if (ret < 0)
-+		return ret;
-+
-+	sb->s_flags |= MS_ACTIVE;
-+	return 0;
-+}
-+
-+static void fs_super_kill(struct super_block *sb)
-+{
-+	struct kdbus_domain *domain = sb->s_fs_info;
-+
-+	if (domain) {
-+		kdbus_node_deactivate(&domain->node);
-+		domain->dentry = NULL;
-+	}
-+
-+	kill_anon_super(sb);
-+	kdbus_domain_unref(domain);
-+}
-+
-+static int fs_super_set(struct super_block *sb, void *data)
-+{
-+	int ret;
-+
-+	ret = set_anon_super(sb, data);
-+	if (!ret)
-+		sb->s_fs_info = data;
-+
-+	return ret;
-+}
-+
-+static struct dentry *fs_super_mount(struct file_system_type *fs_type,
-+				     int flags, const char *dev_name,
-+				     void *data)
-+{
-+	struct kdbus_domain *domain;
-+	struct super_block *sb;
-+	int ret;
-+
-+	domain = kdbus_domain_new(KDBUS_MAKE_ACCESS_WORLD);
-+	if (IS_ERR(domain))
-+		return ERR_CAST(domain);
-+
-+	sb = sget(fs_type, NULL, fs_super_set, flags, domain);
-+	if (IS_ERR(sb)) {
-+		kdbus_node_deactivate(&domain->node);
-+		kdbus_domain_unref(domain);
-+		return ERR_CAST(sb);
-+	}
-+
-+	WARN_ON(sb->s_fs_info != domain);
-+	WARN_ON(sb->s_root);
-+
-+	ret = fs_super_fill(sb);
-+	if (ret < 0) {
-+		/* calls into ->kill_sb() when done */
-+		deactivate_locked_super(sb);
-+		return ERR_PTR(ret);
-+	}
-+
-+	return dget(sb->s_root);
-+}
-+
-+static struct file_system_type fs_type = {
-+	.name		= KBUILD_MODNAME "fs",
-+	.owner		= THIS_MODULE,
-+	.mount		= fs_super_mount,
-+	.kill_sb	= fs_super_kill,
-+	.fs_flags	= FS_USERNS_MOUNT,
-+};
-+
-+/**
-+ * kdbus_fs_init() - register kdbus filesystem
-+ *
-+ * This registers a filesystem with the VFS layer. The filesystem is called
-+ * `KBUILD_MODNAME "fs"', which usually resolves to `kdbusfs'. The nameing
-+ * scheme allows to set KBUILD_MODNAME to "kdbus2" and you will get an
-+ * independent filesystem for developers.
-+ *
-+ * Each mount of the kdbusfs filesystem has an kdbus_domain attached.
-+ * Operations on this mount will only affect the attached domain. On each mount
-+ * a new domain is automatically created and used for this mount exclusively.
-+ * If you want to share a domain across multiple mounts, you need to bind-mount
-+ * it.
-+ *
-+ * Mounts of kdbusfs (with a different domain each) are unrelated to each other
-+ * and will never have any effect on any domain but their own.
-+ *
-+ * Return: 0 on success, negative error otherwise.
-+ */
-+int kdbus_fs_init(void)
-+{
-+	return register_filesystem(&fs_type);
-+}
-+
-+/**
-+ * kdbus_fs_exit() - unregister kdbus filesystem
-+ *
-+ * This does the reverse to kdbus_fs_init(). It unregisters the kdbusfs
-+ * filesystem from VFS and cleans up any allocated resources.
-+ */
-+void kdbus_fs_exit(void)
-+{
-+	unregister_filesystem(&fs_type);
-+}
-+
-+/* acquire domain of @node, making sure all ancestors are active */
-+static struct kdbus_domain *fs_acquire_domain(struct kdbus_node *node)
-+{
-+	struct kdbus_domain *domain;
-+	struct kdbus_node *iter;
-+
-+	/* caller must guarantee that @node is linked */
-+	for (iter = node; iter->parent; iter = iter->parent)
-+		if (!kdbus_node_is_active(iter->parent))
-+			return NULL;
-+
-+	/* root nodes are always domains */
-+	if (WARN_ON(iter->type != KDBUS_NODE_DOMAIN))
-+		return NULL;
-+
-+	domain = kdbus_domain_from_node(iter);
-+	if (!kdbus_node_acquire(&domain->node))
-+		return NULL;
-+
-+	return domain;
-+}
-+
-+/**
-+ * kdbus_fs_flush() - flush dcache entries of a node
-+ * @node:		Node to flush entries of
-+ *
-+ * This flushes all VFS filesystem cache entries for a node and all its
-+ * children. This should be called whenever a node is destroyed during
-+ * runtime. It will flush the cache entries so the linked objects can be
-+ * deallocated.
-+ *
-+ * This is a no-op if you call it on active nodes (they really should stay in
-+ * cache) or on nodes with deactivated parents (flushing the parent is enough).
-+ * Furthermore, there is no need to call it on nodes whose lifetime is bound to
-+ * their parents'. In those cases, the parent-flush will always also flush the
-+ * children.
-+ */
-+void kdbus_fs_flush(struct kdbus_node *node)
-+{
-+	struct dentry *dentry, *parent_dentry = NULL;
-+	struct kdbus_domain *domain;
-+	struct qstr name;
-+
-+	/* active nodes should remain in cache */
-+	if (!kdbus_node_is_deactivated(node))
-+		return;
-+
-+	/* nodes that were never linked were never instantiated */
-+	if (!node->parent)
-+		return;
-+
-+	/* acquire domain and verify all ancestors are active */
-+	domain = fs_acquire_domain(node);
-+	if (!domain)
-+		return;
-+
-+	switch (node->type) {
-+	case KDBUS_NODE_ENDPOINT:
-+		if (WARN_ON(!node->parent || !node->parent->name))
-+			goto exit;
-+
-+		name.name = node->parent->name;
-+		name.len = strlen(node->parent->name);
-+		parent_dentry = d_hash_and_lookup(domain->dentry, &name);
-+		if (IS_ERR_OR_NULL(parent_dentry))
-+			goto exit;
-+
-+		/* fallthrough */
-+	case KDBUS_NODE_BUS:
-+		if (WARN_ON(!node->name))
-+			goto exit;
-+
-+		name.name = node->name;
-+		name.len = strlen(node->name);
-+		dentry = d_hash_and_lookup(parent_dentry ? : domain->dentry,
-+					   &name);
-+		if (!IS_ERR_OR_NULL(dentry)) {
-+			d_invalidate(dentry);
-+			dput(dentry);
-+		}
-+
-+		dput(parent_dentry);
-+		break;
-+
-+	default:
-+		/* all other types are bound to their parent lifetime */
-+		break;
-+	}
-+
-+exit:
-+	kdbus_node_release(&domain->node);
-+}
-diff --git a/ipc/kdbus/fs.h b/ipc/kdbus/fs.h
-new file mode 100644
-index 0000000..62f7d6a
---- /dev/null
-+++ b/ipc/kdbus/fs.h
-@@ -0,0 +1,28 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#ifndef __KDBUSFS_H
-+#define __KDBUSFS_H
-+
-+#include <linux/kernel.h>
-+
-+struct kdbus_node;
-+
-+int kdbus_fs_init(void);
-+void kdbus_fs_exit(void);
-+void kdbus_fs_flush(struct kdbus_node *node);
-+
-+#define kdbus_node_from_inode(_inode) \
-+	((struct kdbus_node *)(_inode)->i_private)
-+
-+#endif
-diff --git a/ipc/kdbus/handle.c b/ipc/kdbus/handle.c
-new file mode 100644
-index 0000000..fc60932
---- /dev/null
-+++ b/ipc/kdbus/handle.c
-@@ -0,0 +1,691 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ * Copyright (C) 2014-2015 Djalal Harouni <tixxdz@××××××.org>
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#include <linux/file.h>
-+#include <linux/fs.h>
-+#include <linux/idr.h>
-+#include <linux/init.h>
-+#include <linux/kdev_t.h>
-+#include <linux/module.h>
-+#include <linux/mutex.h>
-+#include <linux/poll.h>
-+#include <linux/rwsem.h>
-+#include <linux/sched.h>
-+#include <linux/sizes.h>
-+#include <linux/slab.h>
-+#include <linux/uaccess.h>
-+#include <linux/syscalls.h>
-+
-+#include "bus.h"
-+#include "connection.h"
-+#include "endpoint.h"
-+#include "fs.h"
-+#include "handle.h"
-+#include "item.h"
-+#include "match.h"
-+#include "message.h"
-+#include "names.h"
-+#include "domain.h"
-+#include "policy.h"
-+
-+static int kdbus_args_verify(struct kdbus_args *args)
-+{
-+	struct kdbus_item *item;
-+	size_t i;
-+	int ret;
-+
-+	KDBUS_ITEMS_FOREACH(item, args->items, args->items_size) {
-+		struct kdbus_arg *arg = NULL;
-+
-+		if (!KDBUS_ITEM_VALID(item, args->items, args->items_size))
-+			return -EINVAL;
-+
-+		for (i = 0; i < args->argc; ++i)
-+			if (args->argv[i].type == item->type)
-+				break;
-+		if (i >= args->argc)
-+			return -EINVAL;
-+
-+		arg = &args->argv[i];
-+
-+		ret = kdbus_item_validate(item);
-+		if (ret < 0)
-+			return ret;
-+
-+		if (arg->item && !arg->multiple)
-+			return -EINVAL;
-+
-+		arg->item = item;
-+	}
-+
-+	if (!KDBUS_ITEMS_END(item, args->items, args->items_size))
-+		return -EINVAL;
-+
-+	return 0;
-+}
-+
-+static int kdbus_args_negotiate(struct kdbus_args *args)
-+{
-+	struct kdbus_item __user *user;
-+	struct kdbus_item *negotiation;
-+	size_t i, j, num;
-+
-+	/*
-+	 * If KDBUS_FLAG_NEGOTIATE is set, we overwrite the flags field with
-+	 * the set of supported flags. Furthermore, if an KDBUS_ITEM_NEGOTIATE
-+	 * item is passed, we iterate its payload (array of u64, each set to an
-+	 * item type) and clear all unsupported item-types to 0.
-+	 * The caller might do this recursively, if other flags or objects are
-+	 * embedded in the payload itself.
-+	 */
-+
-+	if (args->cmd->flags & KDBUS_FLAG_NEGOTIATE) {
-+		if (put_user(args->allowed_flags & ~KDBUS_FLAG_NEGOTIATE,
-+			     &args->user->flags))
-+			return -EFAULT;
-+	}
-+
-+	if (args->argc < 1 || args->argv[0].type != KDBUS_ITEM_NEGOTIATE ||
-+	    !args->argv[0].item)
-+		return 0;
-+
-+	negotiation = args->argv[0].item;
-+	user = (struct kdbus_item __user *)
-+		((u8 __user *)args->user +
-+		 ((u8 *)negotiation - (u8 *)args->cmd));
-+	num = KDBUS_ITEM_PAYLOAD_SIZE(negotiation) / sizeof(u64);
-+
-+	for (i = 0; i < num; ++i) {
-+		for (j = 0; j < args->argc; ++j)
-+			if (negotiation->data64[i] == args->argv[j].type)
-+				break;
-+
-+		if (j < args->argc)
-+			continue;
-+
-+		/* this item is not supported, clear it out */
-+		negotiation->data64[i] = 0;
-+		if (put_user(negotiation->data64[i], &user->data64[i]))
-+			return -EFAULT;
-+	}
-+
-+	return 0;
-+}
-+
-+/**
-+ * __kdbus_args_parse() - parse payload of kdbus command
-+ * @args:		object to parse data into
-+ * @is_cmd:		whether this is a command or msg payload
-+ * @argp:		user-space location of command payload to parse
-+ * @type_size:		overall size of command payload to parse
-+ * @items_offset:	offset of items array in command payload
-+ * @out:		output variable to store pointer to copied payload
-+ *
-+ * This parses the ioctl payload at user-space location @argp into @args. @args
-+ * must be pre-initialized by the caller to reflect the supported flags and
-+ * items of this command. This parser will then copy the command payload into
-+ * kernel-space, verify correctness and consistency and cache pointers to parsed
-+ * items and other data in @args.
-+ *
-+ * If this function succeeded, you must call kdbus_args_clear() to release
-+ * allocated resources before destroying @args.
-+ *
-+ * This can also be used to import kdbus_msg objects. In that case, @is_cmd must
-+ * be set to 'false' and the 'return_flags' field will not be touched (as it
-+ * doesn't exist on kdbus_msg).
-+ *
-+ * Return: On failure a negative error code is returned. Otherwise, 1 is
-+ * returned if negotiation was requested, 0 if not.
-+ */
-+int __kdbus_args_parse(struct kdbus_args *args, bool is_cmd, void __user *argp,
-+		       size_t type_size, size_t items_offset, void **out)
-+{
-+	u64 user_size;
-+	int ret, i;
-+
-+	ret = kdbus_copy_from_user(&user_size, argp, sizeof(user_size));
-+	if (ret < 0)
-+		return ret;
-+
-+	if (user_size < type_size)
-+		return -EINVAL;
-+	if (user_size > KDBUS_CMD_MAX_SIZE)
-+		return -EMSGSIZE;
-+
-+	if (user_size <= sizeof(args->cmd_buf)) {
-+		if (copy_from_user(args->cmd_buf, argp, user_size))
-+			return -EFAULT;
-+		args->cmd = (void*)args->cmd_buf;
-+	} else {
-+		args->cmd = memdup_user(argp, user_size);
-+		if (IS_ERR(args->cmd))
-+			return PTR_ERR(args->cmd);
-+	}
-+
-+	if (args->cmd->size != user_size) {
-+		ret = -EINVAL;
-+		goto error;
-+	}
-+
-+	if (is_cmd)
-+		args->cmd->return_flags = 0;
-+	args->user = argp;
-+	args->items = (void *)((u8 *)args->cmd + items_offset);
-+	args->items_size = args->cmd->size - items_offset;
-+	args->is_cmd = is_cmd;
-+
-+	if (args->cmd->flags & ~args->allowed_flags) {
-+		ret = -EINVAL;
-+		goto error;
-+	}
-+
-+	ret = kdbus_args_verify(args);
-+	if (ret < 0)
-+		goto error;
-+
-+	ret = kdbus_args_negotiate(args);
-+	if (ret < 0)
-+		goto error;
-+
-+	/* mandatory items must be given (but not on negotiation) */
-+	if (!(args->cmd->flags & KDBUS_FLAG_NEGOTIATE)) {
-+		for (i = 0; i < args->argc; ++i)
-+			if (args->argv[i].mandatory && !args->argv[i].item) {
-+				ret = -EINVAL;
-+				goto error;
-+			}
-+	}
-+
-+	*out = args->cmd;
-+	return !!(args->cmd->flags & KDBUS_FLAG_NEGOTIATE);
-+
-+error:
-+	return kdbus_args_clear(args, ret);
-+}
-+
-+/**
-+ * kdbus_args_clear() - release allocated command resources
-+ * @args:	object to release resources of
-+ * @ret:	return value of this command
-+ *
-+ * This frees all allocated resources on @args and copies the command result
-+ * flags into user-space. @ret is usually returned unchanged by this function,
-+ * so it can be used in the final 'return' statement of the command handler.
-+ *
-+ * Return: -EFAULT if return values cannot be copied into user-space, otherwise
-+ *         @ret is returned unchanged.
-+ */
-+int kdbus_args_clear(struct kdbus_args *args, int ret)
-+{
-+	if (!args)
-+		return ret;
-+
-+	if (!IS_ERR_OR_NULL(args->cmd)) {
-+		if (args->is_cmd && put_user(args->cmd->return_flags,
-+					     &args->user->return_flags))
-+			ret = -EFAULT;
-+		if (args->cmd != (void*)args->cmd_buf)
-+			kfree(args->cmd);
-+		args->cmd = NULL;
-+	}
-+
-+	return ret;
-+}
-+
-+/**
-+ * enum kdbus_handle_type - type an handle can be of
-+ * @KDBUS_HANDLE_NONE:		no type set, yet
-+ * @KDBUS_HANDLE_BUS_OWNER:	bus owner
-+ * @KDBUS_HANDLE_EP_OWNER:	endpoint owner
-+ * @KDBUS_HANDLE_CONNECTED:	endpoint connection after HELLO
-+ */
-+enum kdbus_handle_type {
-+	KDBUS_HANDLE_NONE,
-+	KDBUS_HANDLE_BUS_OWNER,
-+	KDBUS_HANDLE_EP_OWNER,
-+	KDBUS_HANDLE_CONNECTED,
-+};
-+
-+/**
-+ * struct kdbus_handle - handle to the kdbus system
-+ * @lock:		handle lock
-+ * @type:		type of this handle (KDBUS_HANDLE_*)
-+ * @bus_owner:		bus this handle owns
-+ * @ep_owner:		endpoint this handle owns
-+ * @conn:		connection this handle owns
-+ */
-+struct kdbus_handle {
-+	struct mutex lock;
-+
-+	enum kdbus_handle_type type;
-+	union {
-+		struct kdbus_bus *bus_owner;
-+		struct kdbus_ep *ep_owner;
-+		struct kdbus_conn *conn;
-+	};
-+};
-+
-+static int kdbus_handle_open(struct inode *inode, struct file *file)
-+{
-+	struct kdbus_handle *handle;
-+	struct kdbus_node *node;
-+	int ret;
-+
-+	node = kdbus_node_from_inode(inode);
-+	if (!kdbus_node_acquire(node))
-+		return -ESHUTDOWN;
-+
-+	handle = kzalloc(sizeof(*handle), GFP_KERNEL);
-+	if (!handle) {
-+		ret = -ENOMEM;
-+		goto exit;
-+	}
-+
-+	mutex_init(&handle->lock);
-+	handle->type = KDBUS_HANDLE_NONE;
-+
-+	file->private_data = handle;
-+	ret = 0;
-+
-+exit:
-+	kdbus_node_release(node);
-+	return ret;
-+}
-+
-+static int kdbus_handle_release(struct inode *inode, struct file *file)
-+{
-+	struct kdbus_handle *handle = file->private_data;
-+
-+	switch (handle->type) {
-+	case KDBUS_HANDLE_BUS_OWNER:
-+		if (handle->bus_owner) {
-+			kdbus_node_deactivate(&handle->bus_owner->node);
-+			kdbus_bus_unref(handle->bus_owner);
-+		}
-+		break;
-+	case KDBUS_HANDLE_EP_OWNER:
-+		if (handle->ep_owner) {
-+			kdbus_node_deactivate(&handle->ep_owner->node);
-+			kdbus_ep_unref(handle->ep_owner);
-+		}
-+		break;
-+	case KDBUS_HANDLE_CONNECTED:
-+		kdbus_conn_disconnect(handle->conn, false);
-+		kdbus_conn_unref(handle->conn);
-+		break;
-+	case KDBUS_HANDLE_NONE:
-+		/* nothing to clean up */
-+		break;
-+	}
-+
-+	kfree(handle);
-+
-+	return 0;
-+}
-+
-+static long kdbus_handle_ioctl_control(struct file *file, unsigned int cmd,
-+				       void __user *argp)
-+{
-+	struct kdbus_handle *handle = file->private_data;
-+	struct kdbus_node *node = file_inode(file)->i_private;
-+	struct kdbus_domain *domain;
-+	int ret = 0;
-+
-+	if (!kdbus_node_acquire(node))
-+		return -ESHUTDOWN;
-+
-+	/*
-+	 * The parent of control-nodes is always a domain, make sure to pin it
-+	 * so the parent is actually valid.
-+	 */
-+	domain = kdbus_domain_from_node(node->parent);
-+	if (!kdbus_node_acquire(&domain->node)) {
-+		kdbus_node_release(node);
-+		return -ESHUTDOWN;
-+	}
-+
-+	switch (cmd) {
-+	case KDBUS_CMD_BUS_MAKE: {
-+		struct kdbus_bus *bus;
-+
-+		bus = kdbus_cmd_bus_make(domain, argp);
-+		if (IS_ERR_OR_NULL(bus)) {
-+			ret = PTR_ERR_OR_ZERO(bus);
-+			break;
-+		}
-+
-+		handle->bus_owner = bus;
-+		ret = KDBUS_HANDLE_BUS_OWNER;
-+		break;
-+	}
-+
-+	default:
-+		ret = -EBADFD;
-+		break;
-+	}
-+
-+	kdbus_node_release(&domain->node);
-+	kdbus_node_release(node);
-+	return ret;
-+}
-+
-+static long kdbus_handle_ioctl_ep(struct file *file, unsigned int cmd,
-+				  void __user *buf)
-+{
-+	struct kdbus_handle *handle = file->private_data;
-+	struct kdbus_node *node = file_inode(file)->i_private;
-+	struct kdbus_ep *ep, *file_ep = kdbus_ep_from_node(node);
-+	struct kdbus_bus *bus = file_ep->bus;
-+	struct kdbus_conn *conn;
-+	int ret = 0;
-+
-+	if (!kdbus_node_acquire(node))
-+		return -ESHUTDOWN;
-+
-+	switch (cmd) {
-+	case KDBUS_CMD_ENDPOINT_MAKE: {
-+		/* creating custom endpoints is a privileged operation */
-+		if (!kdbus_ep_is_owner(file_ep, file)) {
-+			ret = -EPERM;
-+			break;
-+		}
-+
-+		ep = kdbus_cmd_ep_make(bus, buf);
-+		if (IS_ERR_OR_NULL(ep)) {
-+			ret = PTR_ERR_OR_ZERO(ep);
-+			break;
-+		}
-+
-+		handle->ep_owner = ep;
-+		ret = KDBUS_HANDLE_EP_OWNER;
-+		break;
-+	}
-+
-+	case KDBUS_CMD_HELLO:
-+		conn = kdbus_cmd_hello(file_ep, file, buf);
-+		if (IS_ERR_OR_NULL(conn)) {
-+			ret = PTR_ERR_OR_ZERO(conn);
-+			break;
-+		}
-+
-+		handle->conn = conn;
-+		ret = KDBUS_HANDLE_CONNECTED;
-+		break;
-+
-+	default:
-+		ret = -EBADFD;
-+		break;
-+	}
-+
-+	kdbus_node_release(node);
-+	return ret;
-+}
-+
-+static long kdbus_handle_ioctl_ep_owner(struct file *file, unsigned int command,
-+					void __user *buf)
-+{
-+	struct kdbus_handle *handle = file->private_data;
-+	struct kdbus_ep *ep = handle->ep_owner;
-+	int ret;
-+
-+	if (!kdbus_node_acquire(&ep->node))
-+		return -ESHUTDOWN;
-+
-+	switch (command) {
-+	case KDBUS_CMD_ENDPOINT_UPDATE:
-+		ret = kdbus_cmd_ep_update(ep, buf);
-+		break;
-+	default:
-+		ret = -EBADFD;
-+		break;
-+	}
-+
-+	kdbus_node_release(&ep->node);
-+	return ret;
-+}
-+
-+static long kdbus_handle_ioctl_connected(struct file *file,
-+					 unsigned int command, void __user *buf)
-+{
-+	struct kdbus_handle *handle = file->private_data;
-+	struct kdbus_conn *conn = handle->conn;
-+	struct kdbus_conn *release_conn = NULL;
-+	int ret;
-+
-+	release_conn = conn;
-+	ret = kdbus_conn_acquire(release_conn);
-+	if (ret < 0)
-+		return ret;
-+
-+	switch (command) {
-+	case KDBUS_CMD_BYEBYE:
-+		/*
-+		 * BYEBYE is special; we must not acquire a connection when
-+		 * calling into kdbus_conn_disconnect() or we will deadlock,
-+		 * because kdbus_conn_disconnect() will wait for all acquired
-+		 * references to be dropped.
-+		 */
-+		kdbus_conn_release(release_conn);
-+		release_conn = NULL;
-+		ret = kdbus_cmd_byebye_unlocked(conn, buf);
-+		break;
-+	case KDBUS_CMD_NAME_ACQUIRE:
-+		ret = kdbus_cmd_name_acquire(conn, buf);
-+		break;
-+	case KDBUS_CMD_NAME_RELEASE:
-+		ret = kdbus_cmd_name_release(conn, buf);
-+		break;
-+	case KDBUS_CMD_LIST:
-+		ret = kdbus_cmd_list(conn, buf);
-+		break;
-+	case KDBUS_CMD_CONN_INFO:
-+		ret = kdbus_cmd_conn_info(conn, buf);
-+		break;
-+	case KDBUS_CMD_BUS_CREATOR_INFO:
-+		ret = kdbus_cmd_bus_creator_info(conn, buf);
-+		break;
-+	case KDBUS_CMD_UPDATE:
-+		ret = kdbus_cmd_update(conn, buf);
-+		break;
-+	case KDBUS_CMD_MATCH_ADD:
-+		ret = kdbus_cmd_match_add(conn, buf);
-+		break;
-+	case KDBUS_CMD_MATCH_REMOVE:
-+		ret = kdbus_cmd_match_remove(conn, buf);
-+		break;
-+	case KDBUS_CMD_SEND:
-+		ret = kdbus_cmd_send(conn, file, buf);
-+		break;
-+	case KDBUS_CMD_RECV:
-+		ret = kdbus_cmd_recv(conn, buf);
-+		break;
-+	case KDBUS_CMD_FREE:
-+		ret = kdbus_cmd_free(conn, buf);
-+		break;
-+	default:
-+		ret = -EBADFD;
-+		break;
-+	}
-+
-+	kdbus_conn_release(release_conn);
-+	return ret;
-+}
-+
-+static long kdbus_handle_ioctl(struct file *file, unsigned int cmd,
-+			       unsigned long arg)
-+{
-+	struct kdbus_handle *handle = file->private_data;
-+	struct kdbus_node *node = kdbus_node_from_inode(file_inode(file));
-+	void __user *argp = (void __user *)arg;
-+	long ret = -EBADFD;
-+
-+	switch (cmd) {
-+	case KDBUS_CMD_BUS_MAKE:
-+	case KDBUS_CMD_ENDPOINT_MAKE:
-+	case KDBUS_CMD_HELLO:
-+		mutex_lock(&handle->lock);
-+		if (handle->type == KDBUS_HANDLE_NONE) {
-+			if (node->type == KDBUS_NODE_CONTROL)
-+				ret = kdbus_handle_ioctl_control(file, cmd,
-+								 argp);
-+			else if (node->type == KDBUS_NODE_ENDPOINT)
-+				ret = kdbus_handle_ioctl_ep(file, cmd, argp);
-+
-+			if (ret > 0) {
-+				/*
-+				 * The data given via open() is not sufficient
-+				 * to setup a kdbus handle. Hence, we require
-+				 * the user to perform a setup ioctl. This setup
-+				 * can only be performed once and defines the
-+				 * type of the handle. The different setup
-+				 * ioctls are locked against each other so they
-+				 * cannot race. Once the handle type is set,
-+				 * the type-dependent ioctls are enabled. To
-+				 * improve performance, we don't lock those via
-+				 * handle->lock. Instead, we issue a
-+				 * write-barrier before performing the
-+				 * type-change, which pairs with smp_rmb() in
-+				 * all handlers that access the type field. This
-+				 * guarantees the handle is fully setup, if
-+				 * handle->type is set. If handle->type is
-+				 * unset, you must not make any assumptions
-+				 * without taking handle->lock.
-+				 * Note that handle->type is only set once. It
-+				 * will never change afterwards.
-+				 */
-+				smp_wmb();
-+				handle->type = ret;
-+			}
-+		}
-+		mutex_unlock(&handle->lock);
-+		break;
-+
-+	case KDBUS_CMD_ENDPOINT_UPDATE:
-+	case KDBUS_CMD_BYEBYE:
-+	case KDBUS_CMD_NAME_ACQUIRE:
-+	case KDBUS_CMD_NAME_RELEASE:
-+	case KDBUS_CMD_LIST:
-+	case KDBUS_CMD_CONN_INFO:
-+	case KDBUS_CMD_BUS_CREATOR_INFO:
-+	case KDBUS_CMD_UPDATE:
-+	case KDBUS_CMD_MATCH_ADD:
-+	case KDBUS_CMD_MATCH_REMOVE:
-+	case KDBUS_CMD_SEND:
-+	case KDBUS_CMD_RECV:
-+	case KDBUS_CMD_FREE: {
-+		enum kdbus_handle_type type;
-+
-+		/*
-+		 * This read-barrier pairs with smp_wmb() of the handle setup.
-+		 * it guarantees the handle is fully written, in case the
-+		 * type has been set. It allows us to access the handle without
-+		 * taking handle->lock, given the guarantee that the type is
-+		 * only ever set once, and stays constant afterwards.
-+		 * Furthermore, the handle object itself is not modified in any
-+		 * way after the type is set. That is, the type-field is the
-+		 * last field that is written on any handle. If it has not been
-+		 * set, we must not access the handle here.
-+		 */
-+		type = handle->type;
-+		smp_rmb();
-+
-+		if (type == KDBUS_HANDLE_EP_OWNER)
-+			ret = kdbus_handle_ioctl_ep_owner(file, cmd, argp);
-+		else if (type == KDBUS_HANDLE_CONNECTED)
-+			ret = kdbus_handle_ioctl_connected(file, cmd, argp);
-+
-+		break;
-+	}
-+	default:
-+		ret = -ENOTTY;
-+		break;
-+	}
-+
-+	return ret < 0 ? ret : 0;
-+}
-+
-+static unsigned int kdbus_handle_poll(struct file *file,
-+				      struct poll_table_struct *wait)
-+{
-+	struct kdbus_handle *handle = file->private_data;
-+	enum kdbus_handle_type type;
-+	unsigned int mask = POLLOUT | POLLWRNORM;
-+
-+	/*
-+	 * This pairs with smp_wmb() during handle setup. It guarantees that
-+	 * _iff_ the handle type is set, handle->conn is valid. Furthermore,
-+	 * _iff_ the type is set, the handle object is constant and never
-+	 * changed again. If it's not set, we must not access the handle but
-+	 * bail out. We also must assume no setup has taken place, yet.
-+	 */
-+	type = handle->type;
-+	smp_rmb();
-+
-+	/* Only a connected endpoint can read/write data */
-+	if (type != KDBUS_HANDLE_CONNECTED)
-+		return POLLERR | POLLHUP;
-+
-+	poll_wait(file, &handle->conn->wait, wait);
-+
-+	/*
-+	 * Verify the connection hasn't been deactivated _after_ adding the
-+	 * wait-queue. This guarantees, that if the connection is deactivated
-+	 * after we checked it, the waitqueue is signaled and we're called
-+	 * again.
-+	 */
-+	if (!kdbus_conn_active(handle->conn))
-+		return POLLERR | POLLHUP;
-+
-+	if (!list_empty(&handle->conn->queue.msg_list) ||
-+	    atomic_read(&handle->conn->lost_count) > 0)
-+		mask |= POLLIN | POLLRDNORM;
-+
-+	return mask;
-+}
-+
-+static int kdbus_handle_mmap(struct file *file, struct vm_area_struct *vma)
-+{
-+	struct kdbus_handle *handle = file->private_data;
-+	enum kdbus_handle_type type;
-+	int ret = -EBADFD;
-+
-+	/*
-+	 * This pairs with smp_wmb() during handle setup. It guarantees that
-+	 * _iff_ the handle type is set, handle->conn is valid. Furthermore,
-+	 * _iff_ the type is set, the handle object is constant and never
-+	 * changed again. If it's not set, we must not access the handle but
-+	 * bail out. We also must assume no setup has taken place, yet.
-+	 */
-+	type = handle->type;
-+	smp_rmb();
-+
-+	/* Only connected handles have a pool we can map */
-+	if (type == KDBUS_HANDLE_CONNECTED)
-+		ret = kdbus_pool_mmap(handle->conn->pool, vma);
-+
-+	return ret;
-+}
-+
-+const struct file_operations kdbus_handle_ops = {
-+	.owner =		THIS_MODULE,
-+	.open =			kdbus_handle_open,
-+	.release =		kdbus_handle_release,
-+	.poll =			kdbus_handle_poll,
-+	.llseek =		noop_llseek,
-+	.unlocked_ioctl =	kdbus_handle_ioctl,
-+	.mmap =			kdbus_handle_mmap,
-+#ifdef CONFIG_COMPAT
-+	.compat_ioctl =		kdbus_handle_ioctl,
-+#endif
-+};
-diff --git a/ipc/kdbus/handle.h b/ipc/kdbus/handle.h
-new file mode 100644
-index 0000000..5dde2c1
---- /dev/null
-+++ b/ipc/kdbus/handle.h
-@@ -0,0 +1,103 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#ifndef __KDBUS_HANDLE_H
-+#define __KDBUS_HANDLE_H
-+
-+#include <linux/fs.h>
-+#include <uapi/linux/kdbus.h>
-+
-+extern const struct file_operations kdbus_handle_ops;
-+
-+/**
-+ * kdbus_arg - information and state of a single ioctl command item
-+ * @type:		item type
-+ * @item:		set by the parser to the first found item of this type
-+ * @multiple:		whether multiple items of this type are allowed
-+ * @mandatory:		whether at least one item of this type is required
-+ *
-+ * This structure describes a single item in an ioctl command payload. The
-+ * caller has to pre-fill the type and flags, the parser will then use this
-+ * information to verify the ioctl payload. @item is set by the parser to point
-+ * to the first occurrence of the item.
-+ */
-+struct kdbus_arg {
-+	u64 type;
-+	struct kdbus_item *item;
-+	bool multiple : 1;
-+	bool mandatory : 1;
-+};
-+
-+/**
-+ * kdbus_args - information and state of ioctl command parser
-+ * @allowed_flags:	set of flags this command supports
-+ * @argc:		number of items in @argv
-+ * @argv:		array of items this command supports
-+ * @user:		set by parser to user-space location of current command
-+ * @cmd:		set by parser to kernel copy of command payload
-+ * @cmd_buf:		inline buf to avoid kmalloc() on small cmds
-+ * @items:		points to item array in @cmd
-+ * @items_size:		size of @items in bytes
-+ * @is_cmd:		whether this is a command-payload or msg-payload
-+ *
-+ * This structure is used to parse ioctl command payloads on each invocation.
-+ * The ioctl handler has to pre-fill the flags and allowed items before passing
-+ * the object to kdbus_args_parse(). The parser will copy the command payload
-+ * into kernel-space and verify the correctness of the data.
-+ *
-+ * We use a 256 bytes buffer for small command payloads, to be allocated on
-+ * stack on syscall entrance.
-+ */
-+struct kdbus_args {
-+	u64 allowed_flags;
-+	size_t argc;
-+	struct kdbus_arg *argv;
-+
-+	struct kdbus_cmd __user *user;
-+	struct kdbus_cmd *cmd;
-+	u8 cmd_buf[256];
-+
-+	struct kdbus_item *items;
-+	size_t items_size;
-+	bool is_cmd : 1;
-+};
-+
-+int __kdbus_args_parse(struct kdbus_args *args, bool is_cmd, void __user *argp,
-+		       size_t type_size, size_t items_offset, void **out);
-+int kdbus_args_clear(struct kdbus_args *args, int ret);
-+
-+#define kdbus_args_parse(_args, _argp, _v)                              \
-+	({                                                              \
-+		BUILD_BUG_ON(offsetof(typeof(**(_v)), size) !=          \
-+			     offsetof(struct kdbus_cmd, size));         \
-+		BUILD_BUG_ON(offsetof(typeof(**(_v)), flags) !=         \
-+			     offsetof(struct kdbus_cmd, flags));        \
-+		BUILD_BUG_ON(offsetof(typeof(**(_v)), return_flags) !=  \
-+			     offsetof(struct kdbus_cmd, return_flags)); \
-+		__kdbus_args_parse((_args), 1, (_argp), sizeof(**(_v)), \
-+				   offsetof(typeof(**(_v)), items),     \
-+				   (void **)(_v));                      \
-+	})
-+
-+#define kdbus_args_parse_msg(_args, _argp, _v)                          \
-+	({                                                              \
-+		BUILD_BUG_ON(offsetof(typeof(**(_v)), size) !=          \
-+			     offsetof(struct kdbus_cmd, size));         \
-+		BUILD_BUG_ON(offsetof(typeof(**(_v)), flags) !=         \
-+			     offsetof(struct kdbus_cmd, flags));        \
-+		__kdbus_args_parse((_args), 0, (_argp), sizeof(**(_v)), \
-+				   offsetof(typeof(**(_v)), items),     \
-+				   (void **)(_v));                      \
-+	})
-+
-+#endif
-diff --git a/ipc/kdbus/item.c b/ipc/kdbus/item.c
-new file mode 100644
-index 0000000..ce78dba
---- /dev/null
-+++ b/ipc/kdbus/item.c
-@@ -0,0 +1,293 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ * Copyright (C) 2014-2015 Djalal Harouni <tixxdz@××××××.org>
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#include <linux/ctype.h>
-+#include <linux/fs.h>
-+#include <linux/string.h>
-+
-+#include "item.h"
-+#include "limits.h"
-+#include "util.h"
-+
-+/*
-+ * This verifies the string at position @str with size @size is properly
-+ * zero-terminated and does not contain a 0-byte but at the end.
-+ */
-+static bool kdbus_str_valid(const char *str, size_t size)
-+{
-+	return size > 0 && memchr(str, '\0', size) == str + size - 1;
-+}
-+
-+/**
-+ * kdbus_item_validate_name() - validate an item containing a name
-+ * @item:		Item to validate
-+ *
-+ * Return: zero on success or an negative error code on failure
-+ */
-+int kdbus_item_validate_name(const struct kdbus_item *item)
-+{
-+	const char *name = item->str;
-+	unsigned int i;
-+	size_t len;
-+
-+	if (item->size < KDBUS_ITEM_HEADER_SIZE + 2)
-+		return -EINVAL;
-+
-+	if (item->size > KDBUS_ITEM_HEADER_SIZE +
-+			 KDBUS_SYSNAME_MAX_LEN + 1)
-+		return -ENAMETOOLONG;
-+
-+	if (!kdbus_str_valid(name, KDBUS_ITEM_PAYLOAD_SIZE(item)))
-+		return -EINVAL;
-+
-+	len = strlen(name);
-+	if (len == 0)
-+		return -EINVAL;
-+
-+	for (i = 0; i < len; i++) {
-+		if (isalpha(name[i]))
-+			continue;
-+		if (isdigit(name[i]))
-+			continue;
-+		if (name[i] == '_')
-+			continue;
-+		if (i > 0 && i + 1 < len && (name[i] == '-' || name[i] == '.'))
-+			continue;
-+
-+		return -EINVAL;
-+	}
-+
-+	return 0;
-+}
-+
-+/**
-+ * kdbus_item_validate() - validate a single item
-+ * @item:	item to validate
-+ *
-+ * Return: 0 if item is valid, negative error code if not.
-+ */
-+int kdbus_item_validate(const struct kdbus_item *item)
-+{
-+	size_t payload_size = KDBUS_ITEM_PAYLOAD_SIZE(item);
-+	size_t l;
-+	int ret;
-+
-+	BUILD_BUG_ON(KDBUS_ITEM_HEADER_SIZE !=
-+		     sizeof(struct kdbus_item_header));
-+
-+	if (item->size < KDBUS_ITEM_HEADER_SIZE)
-+		return -EINVAL;
-+
-+	switch (item->type) {
-+	case KDBUS_ITEM_NEGOTIATE:
-+		if (payload_size % sizeof(u64) != 0)
-+			return -EINVAL;
-+		break;
-+
-+	case KDBUS_ITEM_PAYLOAD_VEC:
-+	case KDBUS_ITEM_PAYLOAD_OFF:
-+		if (payload_size != sizeof(struct kdbus_vec))
-+			return -EINVAL;
-+		if (item->vec.size == 0 || item->vec.size > SIZE_MAX)
-+			return -EINVAL;
-+		break;
-+
-+	case KDBUS_ITEM_PAYLOAD_MEMFD:
-+		if (payload_size != sizeof(struct kdbus_memfd))
-+			return -EINVAL;
-+		if (item->memfd.size == 0 || item->memfd.size > SIZE_MAX)
-+			return -EINVAL;
-+		if (item->memfd.fd < 0)
-+			return -EBADF;
-+		break;
-+
-+	case KDBUS_ITEM_FDS:
-+		if (payload_size % sizeof(int) != 0)
-+			return -EINVAL;
-+		break;
-+
-+	case KDBUS_ITEM_CANCEL_FD:
-+		if (payload_size != sizeof(int))
-+			return -EINVAL;
-+		break;
-+
-+	case KDBUS_ITEM_BLOOM_PARAMETER:
-+		if (payload_size != sizeof(struct kdbus_bloom_parameter))
-+			return -EINVAL;
-+		break;
-+
-+	case KDBUS_ITEM_BLOOM_FILTER:
-+		/* followed by the bloom-mask, depends on the bloom-size */
-+		if (payload_size < sizeof(struct kdbus_bloom_filter))
-+			return -EINVAL;
-+		break;
-+
-+	case KDBUS_ITEM_BLOOM_MASK:
-+		/* size depends on bloom-size of bus */
-+		break;
-+
-+	case KDBUS_ITEM_CONN_DESCRIPTION:
-+	case KDBUS_ITEM_MAKE_NAME:
-+		ret = kdbus_item_validate_name(item);
-+		if (ret < 0)
-+			return ret;
-+		break;
-+
-+	case KDBUS_ITEM_ATTACH_FLAGS_SEND:
-+	case KDBUS_ITEM_ATTACH_FLAGS_RECV:
-+	case KDBUS_ITEM_ID:
-+	case KDBUS_ITEM_DST_ID:
-+		if (payload_size != sizeof(u64))
-+			return -EINVAL;
-+		break;
-+
-+	case KDBUS_ITEM_TIMESTAMP:
-+		if (payload_size != sizeof(struct kdbus_timestamp))
-+			return -EINVAL;
-+		break;
-+
-+	case KDBUS_ITEM_CREDS:
-+		if (payload_size != sizeof(struct kdbus_creds))
-+			return -EINVAL;
-+		break;
-+
-+	case KDBUS_ITEM_AUXGROUPS:
-+		if (payload_size % sizeof(u32) != 0)
-+			return -EINVAL;
-+		break;
-+
-+	case KDBUS_ITEM_NAME:
-+	case KDBUS_ITEM_DST_NAME:
-+	case KDBUS_ITEM_PID_COMM:
-+	case KDBUS_ITEM_TID_COMM:
-+	case KDBUS_ITEM_EXE:
-+	case KDBUS_ITEM_CMDLINE:
-+	case KDBUS_ITEM_CGROUP:
-+	case KDBUS_ITEM_SECLABEL:
-+		if (!kdbus_str_valid(item->str, payload_size))
-+			return -EINVAL;
-+		break;
-+
-+	case KDBUS_ITEM_CAPS:
-+		if (payload_size < sizeof(u32))
-+			return -EINVAL;
-+		if (payload_size < sizeof(u32) +
-+		    4 * CAP_TO_INDEX(item->caps.last_cap) * sizeof(u32))
-+			return -EINVAL;
-+		break;
-+
-+	case KDBUS_ITEM_AUDIT:
-+		if (payload_size != sizeof(struct kdbus_audit))
-+			return -EINVAL;
-+		break;
-+
-+	case KDBUS_ITEM_POLICY_ACCESS:
-+		if (payload_size != sizeof(struct kdbus_policy_access))
-+			return -EINVAL;
-+		break;
-+
-+	case KDBUS_ITEM_NAME_ADD:
-+	case KDBUS_ITEM_NAME_REMOVE:
-+	case KDBUS_ITEM_NAME_CHANGE:
-+		if (payload_size < sizeof(struct kdbus_notify_name_change))
-+			return -EINVAL;
-+		l = payload_size - offsetof(struct kdbus_notify_name_change,
-+					    name);
-+		if (l > 0 && !kdbus_str_valid(item->name_change.name, l))
-+			return -EINVAL;
-+		break;
-+
-+	case KDBUS_ITEM_ID_ADD:
-+	case KDBUS_ITEM_ID_REMOVE:
-+		if (payload_size != sizeof(struct kdbus_notify_id_change))
-+			return -EINVAL;
-+		break;
-+
-+	case KDBUS_ITEM_REPLY_TIMEOUT:
-+	case KDBUS_ITEM_REPLY_DEAD:
-+		if (payload_size != 0)
-+			return -EINVAL;
-+		break;
-+
-+	default:
-+		break;
-+	}
-+
-+	return 0;
-+}
-+
-+/**
-+ * kdbus_items_validate() - validate items passed by user-space
-+ * @items:		items to validate
-+ * @items_size:		number of items
-+ *
-+ * This verifies that the passed items pointer is consistent and valid.
-+ * Furthermore, each item is checked for:
-+ *  - valid "size" value
-+ *  - payload is of expected type
-+ *  - payload is fully included in the item
-+ *  - string payloads are zero-terminated
-+ *
-+ * Return: 0 on success, negative error code on failure.
-+ */
-+int kdbus_items_validate(const struct kdbus_item *items, size_t items_size)
-+{
-+	const struct kdbus_item *item;
-+	int ret;
-+
-+	KDBUS_ITEMS_FOREACH(item, items, items_size) {
-+		if (!KDBUS_ITEM_VALID(item, items, items_size))
-+			return -EINVAL;
-+
-+		ret = kdbus_item_validate(item);
-+		if (ret < 0)
-+			return ret;
-+	}
-+
-+	if (!KDBUS_ITEMS_END(item, items, items_size))
-+		return -EINVAL;
-+
-+	return 0;
-+}
-+
-+/**
-+ * kdbus_item_set() - Set item content
-+ * @item:	The item to modify
-+ * @type:	The item type to set (KDBUS_ITEM_*)
-+ * @data:	Data to copy to item->data, may be %NULL
-+ * @len:	Number of bytes in @data
-+ *
-+ * This sets type, size and data fields of an item. If @data is NULL, the data
-+ * memory is cleared.
-+ *
-+ * Note that you must align your @data memory to 8 bytes. Trailing padding (in
-+ * case @len is not 8byte aligned) is cleared by this call.
-+ *
-+ * Returns: Pointer to the following item.
-+ */
-+struct kdbus_item *kdbus_item_set(struct kdbus_item *item, u64 type,
-+				  const void *data, size_t len)
-+{
-+	item->type = type;
-+	item->size = KDBUS_ITEM_HEADER_SIZE + len;
-+
-+	if (data) {
-+		memcpy(item->data, data, len);
-+		memset(item->data + len, 0, KDBUS_ALIGN8(len) - len);
-+	} else {
-+		memset(item->data, 0, KDBUS_ALIGN8(len));
-+	}
-+
-+	return KDBUS_ITEM_NEXT(item);
-+}
-diff --git a/ipc/kdbus/item.h b/ipc/kdbus/item.h
-new file mode 100644
-index 0000000..3a7e6cc
---- /dev/null
-+++ b/ipc/kdbus/item.h
-@@ -0,0 +1,61 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ * Copyright (C) 2014-2015 Djalal Harouni <tixxdz@××××××.org>
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#ifndef __KDBUS_ITEM_H
-+#define __KDBUS_ITEM_H
-+
-+#include <linux/kernel.h>
-+#include <uapi/linux/kdbus.h>
-+
-+#include "util.h"
-+
-+/* generic access and iterators over a stream of items */
-+#define KDBUS_ITEM_NEXT(_i) (typeof(_i))((u8 *)(_i) + KDBUS_ALIGN8((_i)->size))
-+#define KDBUS_ITEMS_SIZE(_h, _is) ((_h)->size - offsetof(typeof(*(_h)), _is))
-+#define KDBUS_ITEM_HEADER_SIZE offsetof(struct kdbus_item, data)
-+#define KDBUS_ITEM_SIZE(_s) KDBUS_ALIGN8(KDBUS_ITEM_HEADER_SIZE + (_s))
-+#define KDBUS_ITEM_PAYLOAD_SIZE(_i) ((_i)->size - KDBUS_ITEM_HEADER_SIZE)
-+
-+#define KDBUS_ITEMS_FOREACH(_i, _is, _s)				\
-+	for ((_i) = (_is);						\
-+	     ((u8 *)(_i) < (u8 *)(_is) + (_s)) &&			\
-+	       ((u8 *)(_i) >= (u8 *)(_is));				\
-+	     (_i) = KDBUS_ITEM_NEXT(_i))
-+
-+#define KDBUS_ITEM_VALID(_i, _is, _s)					\
-+	((_i)->size >= KDBUS_ITEM_HEADER_SIZE &&			\
-+	 (u8 *)(_i) + (_i)->size > (u8 *)(_i) &&			\
-+	 (u8 *)(_i) + (_i)->size <= (u8 *)(_is) + (_s) &&		\
-+	 (u8 *)(_i) >= (u8 *)(_is))
-+
-+#define KDBUS_ITEMS_END(_i, _is, _s)					\
-+	((u8 *)(_i) == ((u8 *)(_is) + KDBUS_ALIGN8(_s)))
-+
-+/**
-+ * struct kdbus_item_header - Describes the fix part of an item
-+ * @size:	The total size of the item
-+ * @type:	The item type, one of KDBUS_ITEM_*
-+ */
-+struct kdbus_item_header {
-+	u64 size;
-+	u64 type;
-+};
-+
-+int kdbus_item_validate_name(const struct kdbus_item *item);
-+int kdbus_item_validate(const struct kdbus_item *item);
-+int kdbus_items_validate(const struct kdbus_item *items, size_t items_size);
-+struct kdbus_item *kdbus_item_set(struct kdbus_item *item, u64 type,
-+				  const void *data, size_t len);
-+
-+#endif
-diff --git a/ipc/kdbus/limits.h b/ipc/kdbus/limits.h
-new file mode 100644
-index 0000000..c54925a
---- /dev/null
-+++ b/ipc/kdbus/limits.h
-@@ -0,0 +1,61 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#ifndef __KDBUS_DEFAULTS_H
-+#define __KDBUS_DEFAULTS_H
-+
-+#include <linux/kernel.h>
-+
-+/* maximum size of message header and items */
-+#define KDBUS_MSG_MAX_SIZE		SZ_8K
-+
-+/* maximum number of memfd items per message */
-+#define KDBUS_MSG_MAX_MEMFD_ITEMS	16
-+
-+/* max size of ioctl command data */
-+#define KDBUS_CMD_MAX_SIZE		SZ_32K
-+
-+/* maximum number of inflight fds in a target queue per user */
-+#define KDBUS_CONN_MAX_FDS_PER_USER	16
-+
-+/* maximum message payload size */
-+#define KDBUS_MSG_MAX_PAYLOAD_VEC_SIZE		SZ_2M
-+
-+/* maximum size of bloom bit field in bytes */
-+#define KDBUS_BUS_BLOOM_MAX_SIZE		SZ_4K
-+
-+/* maximum length of well-known bus name */
-+#define KDBUS_NAME_MAX_LEN			255
-+
-+/* maximum length of bus, domain, ep name */
-+#define KDBUS_SYSNAME_MAX_LEN			63
-+
-+/* maximum number of matches per connection */
-+#define KDBUS_MATCH_MAX				256
-+
-+/* maximum number of queued messages from the same individual user */
-+#define KDBUS_CONN_MAX_MSGS			256
-+
-+/* maximum number of well-known names per connection */
-+#define KDBUS_CONN_MAX_NAMES			256
-+
-+/* maximum number of queued requests waiting for a reply */
-+#define KDBUS_CONN_MAX_REQUESTS_PENDING		128
-+
-+/* maximum number of connections per user in one domain */
-+#define KDBUS_USER_MAX_CONN			1024
-+
-+/* maximum number of buses per user in one domain */
-+#define KDBUS_USER_MAX_BUSES			16
-+
-+#endif
-diff --git a/ipc/kdbus/main.c b/ipc/kdbus/main.c
-new file mode 100644
-index 0000000..1ad4dc8
---- /dev/null
-+++ b/ipc/kdbus/main.c
-@@ -0,0 +1,114 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#define pr_fmt(fmt)    KBUILD_MODNAME ": " fmt
-+#include <linux/fs.h>
-+#include <linux/init.h>
-+#include <linux/module.h>
-+
-+#include "util.h"
-+#include "fs.h"
-+#include "handle.h"
-+#include "metadata.h"
-+#include "node.h"
-+
-+/*
-+ * This is a simplified outline of the internal kdbus object relations, for
-+ * those interested in the inner life of the driver implementation.
-+ *
-+ * From a mount point's (domain's) perspective:
-+ *
-+ * struct kdbus_domain
-+ *   |» struct kdbus_user *user (many, owned)
-+ *   '» struct kdbus_node node (embedded)
-+ *       |» struct kdbus_node children (many, referenced)
-+ *       |» struct kdbus_node *parent (pinned)
-+ *       '» struct kdbus_bus (many, pinned)
-+ *           |» struct kdbus_node node (embedded)
-+ *           '» struct kdbus_ep (many, pinned)
-+ *               |» struct kdbus_node node (embedded)
-+ *               |» struct kdbus_bus *bus (pinned)
-+ *               |» struct kdbus_conn conn_list (many, pinned)
-+ *               |   |» struct kdbus_ep *ep (pinned)
-+ *               |   |» struct kdbus_name_entry *activator_of (owned)
-+ *               |   |» struct kdbus_match_db *match_db (owned)
-+ *               |   |» struct kdbus_meta *meta (owned)
-+ *               |   |» struct kdbus_match_db *match_db (owned)
-+ *               |   |    '» struct kdbus_match_entry (many, owned)
-+ *               |   |
-+ *               |   |» struct kdbus_pool *pool (owned)
-+ *               |   |    '» struct kdbus_pool_slice *slices (many, owned)
-+ *               |   |       '» struct kdbus_pool *pool (pinned)
-+ *               |   |
-+ *               |   |» struct kdbus_user *user (pinned)
-+ *               |   `» struct kdbus_queue_entry entries (many, embedded)
-+ *               |        |» struct kdbus_pool_slice *slice (pinned)
-+ *               |        |» struct kdbus_conn_reply *reply (owned)
-+ *               |        '» struct kdbus_user *user (pinned)
-+ *               |
-+ *               '» struct kdbus_user *user (pinned)
-+ *                   '» struct kdbus_policy_db policy_db (embedded)
-+ *                        |» struct kdbus_policy_db_entry (many, owned)
-+ *                        |   |» struct kdbus_conn (pinned)
-+ *                        |   '» struct kdbus_ep (pinned)
-+ *                        |
-+ *                        '» struct kdbus_policy_db_cache_entry (many, owned)
-+ *                            '» struct kdbus_conn (pinned)
-+ *
-+ * For the life-time of a file descriptor derived from calling open() on a file
-+ * inside the mount point:
-+ *
-+ * struct kdbus_handle
-+ *  |» struct kdbus_meta *meta (owned)
-+ *  |» struct kdbus_ep *ep (pinned)
-+ *  |» struct kdbus_conn *conn (owned)
-+ *  '» struct kdbus_ep *ep (owned)
-+ */
-+
-+/* kdbus mount-point /sys/fs/kdbus */
-+static struct kobject *kdbus_dir;
-+
-+static int __init kdbus_init(void)
-+{
-+	int ret;
-+
-+	kdbus_dir = kobject_create_and_add(KBUILD_MODNAME, fs_kobj);
-+	if (!kdbus_dir)
-+		return -ENOMEM;
-+
-+	ret = kdbus_fs_init();
-+	if (ret < 0) {
-+		pr_err("cannot register filesystem: %d\n", ret);
-+		goto exit_dir;
-+	}
-+
-+	pr_info("initialized\n");
-+	return 0;
-+
-+exit_dir:
-+	kobject_put(kdbus_dir);
-+	return ret;
-+}
-+
-+static void __exit kdbus_exit(void)
-+{
-+	kdbus_fs_exit();
-+	kobject_put(kdbus_dir);
-+	ida_destroy(&kdbus_node_ida);
-+}
-+
-+module_init(kdbus_init);
-+module_exit(kdbus_exit);
-+MODULE_LICENSE("GPL");
-+MODULE_DESCRIPTION("D-Bus, powerful, easy to use interprocess communication");
-+MODULE_ALIAS_FS(KBUILD_MODNAME "fs");
-diff --git a/ipc/kdbus/match.c b/ipc/kdbus/match.c
-new file mode 100644
-index 0000000..4ee6a1f
---- /dev/null
-+++ b/ipc/kdbus/match.c
-@@ -0,0 +1,546 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ * Copyright (C) 2014-2015 Djalal Harouni <tixxdz@××××××.org>
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#include <linux/fs.h>
-+#include <linux/hash.h>
-+#include <linux/init.h>
-+#include <linux/mutex.h>
-+#include <linux/sched.h>
-+#include <linux/sizes.h>
-+#include <linux/slab.h>
-+#include <linux/uaccess.h>
-+
-+#include "bus.h"
-+#include "connection.h"
-+#include "endpoint.h"
-+#include "handle.h"
-+#include "item.h"
-+#include "match.h"
-+#include "message.h"
-+#include "names.h"
-+
-+/**
-+ * struct kdbus_match_db - message filters
-+ * @entries_list:	List of matches
-+ * @mdb_rwlock:		Match data lock
-+ * @entries_count:	Number of entries in database
-+ */
-+struct kdbus_match_db {
-+	struct list_head entries_list;
-+	struct rw_semaphore mdb_rwlock;
-+	unsigned int entries_count;
-+};
-+
-+/**
-+ * struct kdbus_match_entry - a match database entry
-+ * @cookie:		User-supplied cookie to lookup the entry
-+ * @list_entry:		The list entry element for the db list
-+ * @rules_list:		The list head for tracking rules of this entry
-+ */
-+struct kdbus_match_entry {
-+	u64 cookie;
-+	struct list_head list_entry;
-+	struct list_head rules_list;
-+};
-+
-+/**
-+ * struct kdbus_bloom_mask - mask to match against filter
-+ * @generations:	Number of generations carried
-+ * @data:		Array of bloom bit fields
-+ */
-+struct kdbus_bloom_mask {
-+	u64 generations;
-+	u64 *data;
-+};
-+
-+/**
-+ * struct kdbus_match_rule - a rule appended to a match entry
-+ * @type:		An item type to match against
-+ * @bloom_mask:		Bloom mask to match a message's filter against, used
-+ *			with KDBUS_ITEM_BLOOM_MASK
-+ * @name:		Name to match against, used with KDBUS_ITEM_NAME,
-+ *			KDBUS_ITEM_NAME_{ADD,REMOVE,CHANGE}
-+ * @old_id:		ID to match against, used with
-+ *			KDBUS_ITEM_NAME_{ADD,REMOVE,CHANGE},
-+ *			KDBUS_ITEM_ID_REMOVE
-+ * @new_id:		ID to match against, used with
-+ *			KDBUS_ITEM_NAME_{ADD,REMOVE,CHANGE},
-+ *			KDBUS_ITEM_ID_REMOVE
-+ * @src_id:		ID to match against, used with KDBUS_ITEM_ID
-+ * @dst_id:		Message destination ID, used with KDBUS_ITEM_DST_ID
-+ * @rules_entry:	Entry in the entry's rules list
-+ */
-+struct kdbus_match_rule {
-+	u64 type;
-+	union {
-+		struct kdbus_bloom_mask bloom_mask;
-+		struct {
-+			char *name;
-+			u64 old_id;
-+			u64 new_id;
-+		};
-+		u64 src_id;
-+		u64 dst_id;
-+	};
-+	struct list_head rules_entry;
-+};
-+
-+static void kdbus_match_rule_free(struct kdbus_match_rule *rule)
-+{
-+	if (!rule)
-+		return;
-+
-+	switch (rule->type) {
-+	case KDBUS_ITEM_BLOOM_MASK:
-+		kfree(rule->bloom_mask.data);
-+		break;
-+
-+	case KDBUS_ITEM_NAME:
-+	case KDBUS_ITEM_NAME_ADD:
-+	case KDBUS_ITEM_NAME_REMOVE:
-+	case KDBUS_ITEM_NAME_CHANGE:
-+		kfree(rule->name);
-+		break;
-+
-+	case KDBUS_ITEM_ID:
-+	case KDBUS_ITEM_DST_ID:
-+	case KDBUS_ITEM_ID_ADD:
-+	case KDBUS_ITEM_ID_REMOVE:
-+		break;
-+
-+	default:
-+		BUG();
-+	}
-+
-+	list_del(&rule->rules_entry);
-+	kfree(rule);
-+}
-+
-+static void kdbus_match_entry_free(struct kdbus_match_entry *entry)
-+{
-+	struct kdbus_match_rule *r, *tmp;
-+
-+	if (!entry)
-+		return;
-+
-+	list_for_each_entry_safe(r, tmp, &entry->rules_list, rules_entry)
-+		kdbus_match_rule_free(r);
-+
-+	list_del(&entry->list_entry);
-+	kfree(entry);
-+}
-+
-+/**
-+ * kdbus_match_db_free() - free match db resources
-+ * @mdb:		The match database
-+ */
-+void kdbus_match_db_free(struct kdbus_match_db *mdb)
-+{
-+	struct kdbus_match_entry *entry, *tmp;
-+
-+	if (!mdb)
-+		return;
-+
-+	list_for_each_entry_safe(entry, tmp, &mdb->entries_list, list_entry)
-+		kdbus_match_entry_free(entry);
-+
-+	kfree(mdb);
-+}
-+
-+/**
-+ * kdbus_match_db_new() - create a new match database
-+ *
-+ * Return: a new kdbus_match_db on success, ERR_PTR on failure.
-+ */
-+struct kdbus_match_db *kdbus_match_db_new(void)
-+{
-+	struct kdbus_match_db *d;
-+
-+	d = kzalloc(sizeof(*d), GFP_KERNEL);
-+	if (!d)
-+		return ERR_PTR(-ENOMEM);
-+
-+	init_rwsem(&d->mdb_rwlock);
-+	INIT_LIST_HEAD(&d->entries_list);
-+
-+	return d;
-+}
-+
-+static bool kdbus_match_bloom(const struct kdbus_bloom_filter *filter,
-+			      const struct kdbus_bloom_mask *mask,
-+			      const struct kdbus_conn *conn)
-+{
-+	size_t n = conn->ep->bus->bloom.size / sizeof(u64);
-+	const u64 *m;
-+	size_t i;
-+
-+	/*
-+	 * The message's filter carries a generation identifier, the
-+	 * match's mask possibly carries an array of multiple generations
-+	 * of the mask. Select the mask with the closest match of the
-+	 * filter's generation.
-+	 */
-+	m = mask->data + (min(filter->generation, mask->generations - 1) * n);
-+
-+	/*
-+	 * The message's filter contains the messages properties,
-+	 * the match's mask contains the properties to look for in the
-+	 * message. Check the mask bit field against the filter bit field,
-+	 * if the message possibly carries the properties the connection
-+	 * has subscribed to.
-+	 */
-+	for (i = 0; i < n; i++)
-+		if ((filter->data[i] & m[i]) != m[i])
-+			return false;
-+
-+	return true;
-+}
-+
-+static bool kdbus_match_rule_conn(const struct kdbus_match_rule *r,
-+				  struct kdbus_conn *c,
-+				  const struct kdbus_staging *s)
-+{
-+	lockdep_assert_held(&c->ep->bus->name_registry->rwlock);
-+
-+	switch (r->type) {
-+	case KDBUS_ITEM_BLOOM_MASK:
-+		return kdbus_match_bloom(s->bloom_filter, &r->bloom_mask, c);
-+	case KDBUS_ITEM_ID:
-+		return r->src_id == c->id || r->src_id == KDBUS_MATCH_ID_ANY;
-+	case KDBUS_ITEM_DST_ID:
-+		return r->dst_id == s->msg->dst_id ||
-+		       r->dst_id == KDBUS_MATCH_ID_ANY;
-+	case KDBUS_ITEM_NAME:
-+		return kdbus_conn_has_name(c, r->name);
-+	default:
-+		return false;
-+	}
-+}
-+
-+static bool kdbus_match_rule_kernel(const struct kdbus_match_rule *r,
-+				    const struct kdbus_staging *s)
-+{
-+	struct kdbus_item *n = s->notify;
-+
-+	if (WARN_ON(!n) || n->type != r->type)
-+		return false;
-+
-+	switch (r->type) {
-+	case KDBUS_ITEM_ID_ADD:
-+		return r->new_id == KDBUS_MATCH_ID_ANY ||
-+		       r->new_id == n->id_change.id;
-+	case KDBUS_ITEM_ID_REMOVE:
-+		return r->old_id == KDBUS_MATCH_ID_ANY ||
-+		       r->old_id == n->id_change.id;
-+	case KDBUS_ITEM_NAME_ADD:
-+	case KDBUS_ITEM_NAME_CHANGE:
-+	case KDBUS_ITEM_NAME_REMOVE:
-+		return (r->old_id == KDBUS_MATCH_ID_ANY ||
-+		        r->old_id == n->name_change.old_id.id) &&
-+		       (r->new_id == KDBUS_MATCH_ID_ANY ||
-+		        r->new_id == n->name_change.new_id.id) &&
-+		       (!r->name || !strcmp(r->name, n->name_change.name));
-+	default:
-+		return false;
-+	}
-+}
-+
-+static bool kdbus_match_rules(const struct kdbus_match_entry *entry,
-+			      struct kdbus_conn *c,
-+			      const struct kdbus_staging *s)
-+{
-+	struct kdbus_match_rule *r;
-+
-+	list_for_each_entry(r, &entry->rules_list, rules_entry)
-+		if ((c && !kdbus_match_rule_conn(r, c, s)) ||
-+		    (!c && !kdbus_match_rule_kernel(r, s)))
-+			return false;
-+
-+	return true;
-+}
-+
-+/**
-+ * kdbus_match_db_match_msg() - match a msg object agains the database entries
-+ * @mdb:		The match database
-+ * @conn_src:		The connection object originating the message
-+ * @staging:		Staging object containing the message to match against
-+ *
-+ * This function will walk through all the database entries previously uploaded
-+ * with kdbus_match_db_add(). As soon as any of them has an all-satisfied rule
-+ * set, this function will return true.
-+ *
-+ * The caller must hold the registry lock of conn_src->ep->bus, in case conn_src
-+ * is non-NULL.
-+ *
-+ * Return: true if there was a matching database entry, false otherwise.
-+ */
-+bool kdbus_match_db_match_msg(struct kdbus_match_db *mdb,
-+			      struct kdbus_conn *conn_src,
-+			      const struct kdbus_staging *staging)
-+{
-+	struct kdbus_match_entry *entry;
-+	bool matched = false;
-+
-+	down_read(&mdb->mdb_rwlock);
-+	list_for_each_entry(entry, &mdb->entries_list, list_entry) {
-+		matched = kdbus_match_rules(entry, conn_src, staging);
-+		if (matched)
-+			break;
-+	}
-+	up_read(&mdb->mdb_rwlock);
-+
-+	return matched;
-+}
-+
-+static int kdbus_match_db_remove_unlocked(struct kdbus_match_db *mdb,
-+					  u64 cookie)
-+{
-+	struct kdbus_match_entry *entry, *tmp;
-+	bool found = false;
-+
-+	list_for_each_entry_safe(entry, tmp, &mdb->entries_list, list_entry)
-+		if (entry->cookie == cookie) {
-+			kdbus_match_entry_free(entry);
-+			--mdb->entries_count;
-+			found = true;
-+		}
-+
-+	return found ? 0 : -EBADSLT;
-+}
-+
-+/**
-+ * kdbus_cmd_match_add() - handle KDBUS_CMD_MATCH_ADD
-+ * @conn:		connection to operate on
-+ * @argp:		command payload
-+ *
-+ * One call to this function (or one ioctl(KDBUS_CMD_MATCH_ADD), respectively,
-+ * adds one new database entry with n rules attached to it. Each rule is
-+ * described with an kdbus_item, and an entry is considered matching if all
-+ * its rules are satisfied.
-+ *
-+ * The items attached to a kdbus_cmd_match struct have the following mapping:
-+ *
-+ * KDBUS_ITEM_BLOOM_MASK:	A bloom mask
-+ * KDBUS_ITEM_NAME:		A connection's source name
-+ * KDBUS_ITEM_ID:		A connection ID
-+ * KDBUS_ITEM_DST_ID:		A connection ID
-+ * KDBUS_ITEM_NAME_ADD:
-+ * KDBUS_ITEM_NAME_REMOVE:
-+ * KDBUS_ITEM_NAME_CHANGE:	Well-known name changes, carry
-+ *				kdbus_notify_name_change
-+ * KDBUS_ITEM_ID_ADD:
-+ * KDBUS_ITEM_ID_REMOVE:	Connection ID changes, carry
-+ *				kdbus_notify_id_change
-+ *
-+ * For kdbus_notify_{id,name}_change structs, only the ID and name fields
-+ * are looked at when adding an entry. The flags are unused.
-+ *
-+ * Also note that KDBUS_ITEM_BLOOM_MASK, KDBUS_ITEM_NAME, KDBUS_ITEM_ID,
-+ * and KDBUS_ITEM_DST_ID are used to match messages from userspace, while the
-+ * others apply to kernel-generated notifications.
-+ *
-+ * Return: >=0 on success, negative error code on failure.
-+ */
-+int kdbus_cmd_match_add(struct kdbus_conn *conn, void __user *argp)
-+{
-+	struct kdbus_match_db *mdb = conn->match_db;
-+	struct kdbus_match_entry *entry = NULL;
-+	struct kdbus_cmd_match *cmd;
-+	struct kdbus_item *item;
-+	int ret;
-+
-+	struct kdbus_arg argv[] = {
-+		{ .type = KDBUS_ITEM_NEGOTIATE },
-+		{ .type = KDBUS_ITEM_BLOOM_MASK, .multiple = true },
-+		{ .type = KDBUS_ITEM_NAME, .multiple = true },
-+		{ .type = KDBUS_ITEM_ID, .multiple = true },
-+		{ .type = KDBUS_ITEM_DST_ID, .multiple = true },
-+		{ .type = KDBUS_ITEM_NAME_ADD, .multiple = true },
-+		{ .type = KDBUS_ITEM_NAME_REMOVE, .multiple = true },
-+		{ .type = KDBUS_ITEM_NAME_CHANGE, .multiple = true },
-+		{ .type = KDBUS_ITEM_ID_ADD, .multiple = true },
-+		{ .type = KDBUS_ITEM_ID_REMOVE, .multiple = true },
-+	};
-+	struct kdbus_args args = {
-+		.allowed_flags = KDBUS_FLAG_NEGOTIATE |
-+				 KDBUS_MATCH_REPLACE,
-+		.argv = argv,
-+		.argc = ARRAY_SIZE(argv),
-+	};
-+
-+	if (!kdbus_conn_is_ordinary(conn))
-+		return -EOPNOTSUPP;
-+
-+	ret = kdbus_args_parse(&args, argp, &cmd);
-+	if (ret != 0)
-+		return ret;
-+
-+	entry = kzalloc(sizeof(*entry), GFP_KERNEL);
-+	if (!entry) {
-+		ret = -ENOMEM;
-+		goto exit;
-+	}
-+
-+	entry->cookie = cmd->cookie;
-+	INIT_LIST_HEAD(&entry->list_entry);
-+	INIT_LIST_HEAD(&entry->rules_list);
-+
-+	KDBUS_ITEMS_FOREACH(item, cmd->items, KDBUS_ITEMS_SIZE(cmd, items)) {
-+		struct kdbus_match_rule *rule;
-+		size_t size = item->size - offsetof(struct kdbus_item, data);
-+
-+		rule = kzalloc(sizeof(*rule), GFP_KERNEL);
-+		if (!rule) {
-+			ret = -ENOMEM;
-+			goto exit;
-+		}
-+
-+		rule->type = item->type;
-+		INIT_LIST_HEAD(&rule->rules_entry);
-+
-+		switch (item->type) {
-+		case KDBUS_ITEM_BLOOM_MASK: {
-+			u64 bsize = conn->ep->bus->bloom.size;
-+			u64 generations;
-+			u64 remainder;
-+
-+			generations = div64_u64_rem(size, bsize, &remainder);
-+			if (size < bsize || remainder > 0) {
-+				ret = -EDOM;
-+				break;
-+			}
-+
-+			rule->bloom_mask.data = kmemdup(item->data,
-+							size, GFP_KERNEL);
-+			if (!rule->bloom_mask.data) {
-+				ret = -ENOMEM;
-+				break;
-+			}
-+
-+			rule->bloom_mask.generations = generations;
-+			break;
-+		}
-+
-+		case KDBUS_ITEM_NAME:
-+			if (!kdbus_name_is_valid(item->str, false)) {
-+				ret = -EINVAL;
-+				break;
-+			}
-+
-+			rule->name = kstrdup(item->str, GFP_KERNEL);
-+			if (!rule->name)
-+				ret = -ENOMEM;
-+
-+			break;
-+
-+		case KDBUS_ITEM_ID:
-+			rule->src_id = item->id;
-+			break;
-+
-+		case KDBUS_ITEM_DST_ID:
-+			rule->dst_id = item->id;
-+			break;
-+
-+		case KDBUS_ITEM_NAME_ADD:
-+		case KDBUS_ITEM_NAME_REMOVE:
-+		case KDBUS_ITEM_NAME_CHANGE:
-+			rule->old_id = item->name_change.old_id.id;
-+			rule->new_id = item->name_change.new_id.id;
-+
-+			if (size > sizeof(struct kdbus_notify_name_change)) {
-+				rule->name = kstrdup(item->name_change.name,
-+						     GFP_KERNEL);
-+				if (!rule->name)
-+					ret = -ENOMEM;
-+			}
-+
-+			break;
-+
-+		case KDBUS_ITEM_ID_ADD:
-+		case KDBUS_ITEM_ID_REMOVE:
-+			if (item->type == KDBUS_ITEM_ID_ADD)
-+				rule->new_id = item->id_change.id;
-+			else
-+				rule->old_id = item->id_change.id;
-+
-+			break;
-+		}
-+
-+		if (ret < 0) {
-+			kdbus_match_rule_free(rule);
-+			goto exit;
-+		}
-+
-+		list_add_tail(&rule->rules_entry, &entry->rules_list);
-+	}
-+
-+	down_write(&mdb->mdb_rwlock);
-+
-+	/* Remove any entry that has the same cookie as the current one. */
-+	if (cmd->flags & KDBUS_MATCH_REPLACE)
-+		kdbus_match_db_remove_unlocked(mdb, entry->cookie);
-+
-+	/*
-+	 * If the above removal caught any entry, there will be room for the
-+	 * new one.
-+	 */
-+	if (++mdb->entries_count > KDBUS_MATCH_MAX) {
-+		--mdb->entries_count;
-+		ret = -EMFILE;
-+	} else {
-+		list_add_tail(&entry->list_entry, &mdb->entries_list);
-+		entry = NULL;
-+	}
-+
-+	up_write(&mdb->mdb_rwlock);
-+
-+exit:
-+	kdbus_match_entry_free(entry);
-+	return kdbus_args_clear(&args, ret);
-+}
-+
-+/**
-+ * kdbus_cmd_match_remove() - handle KDBUS_CMD_MATCH_REMOVE
-+ * @conn:		connection to operate on
-+ * @argp:		command payload
-+ *
-+ * Return: >=0 on success, negative error code on failure.
-+ */
-+int kdbus_cmd_match_remove(struct kdbus_conn *conn, void __user *argp)
-+{
-+	struct kdbus_cmd_match *cmd;
-+	int ret;
-+
-+	struct kdbus_arg argv[] = {
-+		{ .type = KDBUS_ITEM_NEGOTIATE },
-+	};
-+	struct kdbus_args args = {
-+		.allowed_flags = KDBUS_FLAG_NEGOTIATE,
-+		.argv = argv,
-+		.argc = ARRAY_SIZE(argv),
-+	};
-+
-+	if (!kdbus_conn_is_ordinary(conn))
-+		return -EOPNOTSUPP;
-+
-+	ret = kdbus_args_parse(&args, argp, &cmd);
-+	if (ret != 0)
-+		return ret;
-+
-+	down_write(&conn->match_db->mdb_rwlock);
-+	ret = kdbus_match_db_remove_unlocked(conn->match_db, cmd->cookie);
-+	up_write(&conn->match_db->mdb_rwlock);
-+
-+	return kdbus_args_clear(&args, ret);
-+}
-diff --git a/ipc/kdbus/match.h b/ipc/kdbus/match.h
-new file mode 100644
-index 0000000..ceb492f
---- /dev/null
-+++ b/ipc/kdbus/match.h
-@@ -0,0 +1,35 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ * Copyright (C) 2014-2015 Djalal Harouni <tixxdz@××××××.org>
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#ifndef __KDBUS_MATCH_H
-+#define __KDBUS_MATCH_H
-+
-+struct kdbus_conn;
-+struct kdbus_match_db;
-+struct kdbus_staging;
-+
-+struct kdbus_match_db *kdbus_match_db_new(void);
-+void kdbus_match_db_free(struct kdbus_match_db *db);
-+int kdbus_match_db_add(struct kdbus_conn *conn,
-+		       struct kdbus_cmd_match *cmd);
-+int kdbus_match_db_remove(struct kdbus_conn *conn,
-+			  struct kdbus_cmd_match *cmd);
-+bool kdbus_match_db_match_msg(struct kdbus_match_db *db,
-+			      struct kdbus_conn *conn_src,
-+			      const struct kdbus_staging *staging);
-+
-+int kdbus_cmd_match_add(struct kdbus_conn *conn, void __user *argp);
-+int kdbus_cmd_match_remove(struct kdbus_conn *conn, void __user *argp);
-+
-+#endif
-diff --git a/ipc/kdbus/message.c b/ipc/kdbus/message.c
-new file mode 100644
-index 0000000..ae565cd
---- /dev/null
-+++ b/ipc/kdbus/message.c
-@@ -0,0 +1,1040 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ * Copyright (C) 2014-2015 Djalal Harouni <tixxdz@××××××.org>
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#include <linux/capability.h>
-+#include <linux/cgroup.h>
-+#include <linux/cred.h>
-+#include <linux/file.h>
-+#include <linux/init.h>
-+#include <linux/module.h>
-+#include <linux/mutex.h>
-+#include <linux/sched.h>
-+#include <linux/shmem_fs.h>
-+#include <linux/sizes.h>
-+#include <linux/slab.h>
-+#include <linux/uaccess.h>
-+#include <net/sock.h>
-+
-+#include "bus.h"
-+#include "connection.h"
-+#include "domain.h"
-+#include "endpoint.h"
-+#include "handle.h"
-+#include "item.h"
-+#include "match.h"
-+#include "message.h"
-+#include "names.h"
-+#include "policy.h"
-+
-+static const char * const zeros = "\0\0\0\0\0\0\0";
-+
-+static struct kdbus_gaps *kdbus_gaps_new(size_t n_memfds, size_t n_fds)
-+{
-+	size_t size_offsets, size_memfds, size_fds, size;
-+	struct kdbus_gaps *gaps;
-+
-+	size_offsets = n_memfds * sizeof(*gaps->memfd_offsets);
-+	size_memfds = n_memfds * sizeof(*gaps->memfd_files);
-+	size_fds = n_fds * sizeof(*gaps->fd_files);
-+	size = sizeof(*gaps) + size_offsets + size_memfds + size_fds;
-+
-+	gaps = kzalloc(size, GFP_KERNEL);
-+	if (!gaps)
-+		return ERR_PTR(-ENOMEM);
-+
-+	kref_init(&gaps->kref);
-+	gaps->n_memfds = 0; /* we reserve n_memfds, but don't enforce them */
-+	gaps->memfd_offsets = (void *)(gaps + 1);
-+	gaps->memfd_files = (void *)((u8 *)gaps->memfd_offsets + size_offsets);
-+	gaps->n_fds = 0; /* we reserve n_fds, but don't enforce them */
-+	gaps->fd_files = (void *)((u8 *)gaps->memfd_files + size_memfds);
-+
-+	return gaps;
-+}
-+
-+static void kdbus_gaps_free(struct kref *kref)
-+{
-+	struct kdbus_gaps *gaps = container_of(kref, struct kdbus_gaps, kref);
-+	size_t i;
-+
-+	for (i = 0; i < gaps->n_fds; ++i)
-+		if (gaps->fd_files[i])
-+			fput(gaps->fd_files[i]);
-+	for (i = 0; i < gaps->n_memfds; ++i)
-+		if (gaps->memfd_files[i])
-+			fput(gaps->memfd_files[i]);
-+
-+	kfree(gaps);
-+}
-+
-+/**
-+ * kdbus_gaps_ref() - gain reference
-+ * @gaps:	gaps object
-+ *
-+ * Return: @gaps is returned
-+ */
-+struct kdbus_gaps *kdbus_gaps_ref(struct kdbus_gaps *gaps)
-+{
-+	if (gaps)
-+		kref_get(&gaps->kref);
-+	return gaps;
-+}
-+
-+/**
-+ * kdbus_gaps_unref() - drop reference
-+ * @gaps:	gaps object
-+ *
-+ * Return: NULL
-+ */
-+struct kdbus_gaps *kdbus_gaps_unref(struct kdbus_gaps *gaps)
-+{
-+	if (gaps)
-+		kref_put(&gaps->kref, kdbus_gaps_free);
-+	return NULL;
-+}
-+
-+/**
-+ * kdbus_gaps_install() - install file-descriptors
-+ * @gaps:		gaps object, or NULL
-+ * @slice:		pool slice that contains the message
-+ * @out_incomplete	output variable to note incomplete fds
-+ *
-+ * This function installs all file-descriptors of @gaps into the current
-+ * process and copies the file-descriptor numbers into the target pool slice.
-+ *
-+ * If the file-descriptors were only partially installed, then @out_incomplete
-+ * will be set to true. Otherwise, it's set to false.
-+ *
-+ * Return: 0 on success, negative error code on failure
-+ */
-+int kdbus_gaps_install(struct kdbus_gaps *gaps, struct kdbus_pool_slice *slice,
-+		       bool *out_incomplete)
-+{
-+	bool incomplete_fds = false;
-+	struct kvec kvec;
-+	size_t i, n_fds;
-+	int ret, *fds;
-+
-+	if (!gaps) {
-+		/* nothing to do */
-+		*out_incomplete = incomplete_fds;
-+		return 0;
-+	}
-+
-+	n_fds = gaps->n_fds + gaps->n_memfds;
-+	if (n_fds < 1) {
-+		/* nothing to do */
-+		*out_incomplete = incomplete_fds;
-+		return 0;
-+	}
-+
-+	fds = kmalloc_array(n_fds, sizeof(*fds), GFP_TEMPORARY);
-+	n_fds = 0;
-+	if (!fds)
-+		return -ENOMEM;
-+
-+	/* 1) allocate fds and copy them over */
-+
-+	if (gaps->n_fds > 0) {
-+		for (i = 0; i < gaps->n_fds; ++i) {
-+			int fd;
-+
-+			fd = get_unused_fd_flags(O_CLOEXEC);
-+			if (fd < 0)
-+				incomplete_fds = true;
-+
-+			WARN_ON(!gaps->fd_files[i]);
-+
-+			fds[n_fds++] = fd < 0 ? -1 : fd;
-+		}
-+
-+		/*
-+		 * The file-descriptor array can only be present once per
-+		 * message. Hence, prepare all fds and then copy them over with
-+		 * a single kvec.
-+		 */
-+
-+		WARN_ON(!gaps->fd_offset);
-+
-+		kvec.iov_base = fds;
-+		kvec.iov_len = gaps->n_fds * sizeof(*fds);
-+		ret = kdbus_pool_slice_copy_kvec(slice, gaps->fd_offset,
-+						 &kvec, 1, kvec.iov_len);
-+		if (ret < 0)
-+			goto exit;
-+	}
-+
-+	for (i = 0; i < gaps->n_memfds; ++i) {
-+		int memfd;
-+
-+		memfd = get_unused_fd_flags(O_CLOEXEC);
-+		if (memfd < 0) {
-+			incomplete_fds = true;
-+			/* memfds are initialized to -1, skip copying it */
-+			continue;
-+		}
-+
-+		fds[n_fds++] = memfd;
-+
-+		/*
-+		 * memfds have to be copied individually as they each are put
-+		 * into a separate item. This should not be an issue, though,
-+		 * as usually there is no need to send more than one memfd per
-+		 * message.
-+		 */
-+
-+		WARN_ON(!gaps->memfd_offsets[i]);
-+		WARN_ON(!gaps->memfd_files[i]);
-+
-+		kvec.iov_base = &memfd;
-+		kvec.iov_len = sizeof(memfd);
-+		ret = kdbus_pool_slice_copy_kvec(slice, gaps->memfd_offsets[i],
-+						 &kvec, 1, kvec.iov_len);
-+		if (ret < 0)
-+			goto exit;
-+	}
-+
-+	/* 2) install fds now that everything was successful */
-+
-+	for (i = 0; i < gaps->n_fds; ++i)
-+		if (fds[i] >= 0)
-+			fd_install(fds[i], get_file(gaps->fd_files[i]));
-+	for (i = 0; i < gaps->n_memfds; ++i)
-+		if (fds[gaps->n_fds + i] >= 0)
-+			fd_install(fds[gaps->n_fds + i],
-+				   get_file(gaps->memfd_files[i]));
-+
-+	ret = 0;
-+
-+exit:
-+	if (ret < 0)
-+		for (i = 0; i < n_fds; ++i)
-+			put_unused_fd(fds[i]);
-+	kfree(fds);
-+	*out_incomplete = incomplete_fds;
-+	return ret;
-+}
-+
-+static struct file *kdbus_get_fd(int fd)
-+{
-+	struct file *f, *ret;
-+	struct inode *inode;
-+	struct socket *sock;
-+
-+	if (fd < 0)
-+		return ERR_PTR(-EBADF);
-+
-+	f = fget_raw(fd);
-+	if (!f)
-+		return ERR_PTR(-EBADF);
-+
-+	inode = file_inode(f);
-+	sock = S_ISSOCK(inode->i_mode) ? SOCKET_I(inode) : NULL;
-+
-+	if (f->f_mode & FMODE_PATH)
-+		ret = f; /* O_PATH is always allowed */
-+	else if (f->f_op == &kdbus_handle_ops)
-+		ret = ERR_PTR(-EOPNOTSUPP); /* disallow kdbus-fd over kdbus */
-+	else if (sock && sock->sk && sock->ops && sock->ops->family == PF_UNIX)
-+		ret = ERR_PTR(-EOPNOTSUPP); /* disallow UDS over kdbus */
-+	else
-+		ret = f; /* all other are allowed */
-+
-+	if (f != ret)
-+		fput(f);
-+
-+	return ret;
-+}
-+
-+static struct file *kdbus_get_memfd(const struct kdbus_memfd *memfd)
-+{
-+	const int m = F_SEAL_SHRINK | F_SEAL_GROW | F_SEAL_WRITE | F_SEAL_SEAL;
-+	struct file *f, *ret;
-+	int s;
-+
-+	if (memfd->fd < 0)
-+		return ERR_PTR(-EBADF);
-+
-+	f = fget(memfd->fd);
-+	if (!f)
-+		return ERR_PTR(-EBADF);
-+
-+	s = shmem_get_seals(f);
-+	if (s < 0)
-+		ret = ERR_PTR(-EMEDIUMTYPE);
-+	else if ((s & m) != m)
-+		ret = ERR_PTR(-ETXTBSY);
-+	else if (memfd->start + memfd->size > (u64)i_size_read(file_inode(f)))
-+		ret = ERR_PTR(-EFAULT);
-+	else
-+		ret = f;
-+
-+	if (f != ret)
-+		fput(f);
-+
-+	return ret;
-+}
-+
-+static int kdbus_msg_examine(struct kdbus_msg *msg, struct kdbus_bus *bus,
-+			     struct kdbus_cmd_send *cmd, size_t *out_n_memfds,
-+			     size_t *out_n_fds, size_t *out_n_parts)
-+{
-+	struct kdbus_item *item, *fds = NULL, *bloom = NULL, *dstname = NULL;
-+	u64 n_parts, n_memfds, n_fds, vec_size;
-+
-+	/*
-+	 * Step 1:
-+	 * Validate the message and command parameters.
-+	 */
-+
-+	/* KDBUS_PAYLOAD_KERNEL is reserved to kernel messages */
-+	if (msg->payload_type == KDBUS_PAYLOAD_KERNEL)
-+		return -EINVAL;
-+
-+	if (msg->dst_id == KDBUS_DST_ID_BROADCAST) {
-+		/* broadcasts must be marked as signals */
-+		if (!(msg->flags & KDBUS_MSG_SIGNAL))
-+			return -EBADMSG;
-+		/* broadcasts cannot have timeouts */
-+		if (msg->timeout_ns > 0)
-+			return -ENOTUNIQ;
-+	}
-+
-+	if (msg->flags & KDBUS_MSG_EXPECT_REPLY) {
-+		/* if you expect a reply, you must specify a timeout */
-+		if (msg->timeout_ns == 0)
-+			return -EINVAL;
-+		/* signals cannot have replies */
-+		if (msg->flags & KDBUS_MSG_SIGNAL)
-+			return -ENOTUNIQ;
-+	} else {
-+		/* must expect reply if sent as synchronous call */
-+		if (cmd->flags & KDBUS_SEND_SYNC_REPLY)
-+			return -EINVAL;
-+		/* cannot mark replies as signal */
-+		if (msg->cookie_reply && (msg->flags & KDBUS_MSG_SIGNAL))
-+			return -EINVAL;
-+	}
-+
-+	/*
-+	 * Step 2:
-+	 * Validate all passed items. While at it, select some statistics that
-+	 * are required to allocate state objects later on.
-+	 *
-+	 * Generic item validation has already been done via
-+	 * kdbus_item_validate(). Furthermore, the number of items is naturally
-+	 * limited by the maximum message size. Hence, only non-generic item
-+	 * checks are performed here (mainly integer overflow tests).
-+	 */
-+
-+	n_parts = 0;
-+	n_memfds = 0;
-+	n_fds = 0;
-+	vec_size = 0;
-+
-+	KDBUS_ITEMS_FOREACH(item, msg->items, KDBUS_ITEMS_SIZE(msg, items)) {
-+		switch (item->type) {
-+		case KDBUS_ITEM_PAYLOAD_VEC: {
-+			void __force __user *ptr = KDBUS_PTR(item->vec.address);
-+			u64 size = item->vec.size;
-+
-+			if (vec_size + size < vec_size)
-+				return -EMSGSIZE;
-+			if (vec_size + size > KDBUS_MSG_MAX_PAYLOAD_VEC_SIZE)
-+				return -EMSGSIZE;
-+			if (ptr && unlikely(!access_ok(VERIFY_READ, ptr, size)))
-+				return -EFAULT;
-+
-+			if (ptr || size % 8) /* data or padding */
-+				++n_parts;
-+			break;
-+		}
-+		case KDBUS_ITEM_PAYLOAD_MEMFD: {
-+			u64 start = item->memfd.start;
-+			u64 size = item->memfd.size;
-+
-+			if (start + size < start)
-+				return -EMSGSIZE;
-+			if (n_memfds >= KDBUS_MSG_MAX_MEMFD_ITEMS)
-+				return -E2BIG;
-+
-+			++n_memfds;
-+			if (size % 8) /* vec-padding required */
-+				++n_parts;
-+			break;
-+		}
-+		case KDBUS_ITEM_FDS: {
-+			if (fds)
-+				return -EEXIST;
-+
-+			fds = item;
-+			n_fds = KDBUS_ITEM_PAYLOAD_SIZE(item) / sizeof(int);
-+			if (n_fds > KDBUS_CONN_MAX_FDS_PER_USER)
-+				return -EMFILE;
-+
-+			break;
-+		}
-+		case KDBUS_ITEM_BLOOM_FILTER: {
-+			u64 bloom_size;
-+
-+			if (bloom)
-+				return -EEXIST;
-+
-+			bloom = item;
-+			bloom_size = KDBUS_ITEM_PAYLOAD_SIZE(item) -
-+				     offsetof(struct kdbus_bloom_filter, data);
-+			if (!KDBUS_IS_ALIGNED8(bloom_size))
-+				return -EFAULT;
-+			if (bloom_size != bus->bloom.size)
-+				return -EDOM;
-+
-+			break;
-+		}
-+		case KDBUS_ITEM_DST_NAME: {
-+			if (dstname)
-+				return -EEXIST;
-+
-+			dstname = item;
-+			if (!kdbus_name_is_valid(item->str, false))
-+				return -EINVAL;
-+			if (msg->dst_id == KDBUS_DST_ID_BROADCAST)
-+				return -EBADMSG;
-+
-+			break;
-+		}
-+		default:
-+			return -EINVAL;
-+		}
-+	}
-+
-+	/*
-+	 * Step 3:
-+	 * Validate that required items were actually passed, and that no item
-+	 * contradicts the message flags.
-+	 */
-+
-+	/* bloom filters must be attached _iff_ it's a signal */
-+	if (!(msg->flags & KDBUS_MSG_SIGNAL) != !bloom)
-+		return -EBADMSG;
-+	/* destination name is required if no ID is given */
-+	if (msg->dst_id == KDBUS_DST_ID_NAME && !dstname)
-+		return -EDESTADDRREQ;
-+	/* cannot send file-descriptors attached to broadcasts */
-+	if (msg->dst_id == KDBUS_DST_ID_BROADCAST && fds)
-+		return -ENOTUNIQ;
-+
-+	*out_n_memfds = n_memfds;
-+	*out_n_fds = n_fds;
-+	*out_n_parts = n_parts;
-+
-+	return 0;
-+}
-+
-+static bool kdbus_staging_merge_vecs(struct kdbus_staging *staging,
-+				     struct kdbus_item **prev_item,
-+				     struct iovec **prev_vec,
-+				     const struct kdbus_item *merge)
-+{
-+	void __user *ptr = (void __user *)KDBUS_PTR(merge->vec.address);
-+	u64 padding = merge->vec.size % 8;
-+	struct kdbus_item *prev = *prev_item;
-+	struct iovec *vec = *prev_vec;
-+
-+	/* XXX: merging is disabled so far */
-+	if (0 && prev && prev->type == KDBUS_ITEM_PAYLOAD_OFF &&
-+	    !merge->vec.address == !prev->vec.address) {
-+		/*
-+		 * If we merge two VECs, we can always drop the second
-+		 * PAYLOAD_VEC item. Hence, include its size in the previous
-+		 * one.
-+		 */
-+		prev->vec.size += merge->vec.size;
-+
-+		if (ptr) {
-+			/*
-+			 * If we merge two data VECs, we need two iovecs to copy
-+			 * the data. But the items can be easily merged by
-+			 * summing their lengths.
-+			 */
-+			vec = &staging->parts[staging->n_parts++];
-+			vec->iov_len = merge->vec.size;
-+			vec->iov_base = ptr;
-+			staging->n_payload += vec->iov_len;
-+		} else if (padding) {
-+			/*
-+			 * If we merge two 0-vecs with the second 0-vec
-+			 * requiring padding, we need to insert an iovec to copy
-+			 * the 0-padding. We try merging it with the previous
-+			 * 0-padding iovec. This might end up with an
-+			 * iov_len==0, in which case we simply drop the iovec.
-+			 */
-+			if (vec) {
-+				staging->n_payload -= vec->iov_len;
-+				vec->iov_len = prev->vec.size % 8;
-+				if (!vec->iov_len) {
-+					--staging->n_parts;
-+					vec = NULL;
-+				} else {
-+					staging->n_payload += vec->iov_len;
-+				}
-+			} else {
-+				vec = &staging->parts[staging->n_parts++];
-+				vec->iov_len = padding;
-+				vec->iov_base = (char __user *)zeros;
-+				staging->n_payload += vec->iov_len;
-+			}
-+		} else {
-+			/*
-+			 * If we merge two 0-vecs with the second 0-vec having
-+			 * no padding, we know the padding of the first stays
-+			 * the same. Hence, @vec needs no adjustment.
-+			 */
-+		}
-+
-+		/* successfully merged with previous item */
-+		merge = prev;
-+	} else {
-+		/*
-+		 * If we cannot merge the payload item with the previous one,
-+		 * we simply insert a new iovec for the data/padding.
-+		 */
-+		if (ptr) {
-+			vec = &staging->parts[staging->n_parts++];
-+			vec->iov_len = merge->vec.size;
-+			vec->iov_base = ptr;
-+			staging->n_payload += vec->iov_len;
-+		} else if (padding) {
-+			vec = &staging->parts[staging->n_parts++];
-+			vec->iov_len = padding;
-+			vec->iov_base = (char __user *)zeros;
-+			staging->n_payload += vec->iov_len;
-+		} else {
-+			vec = NULL;
-+		}
-+	}
-+
-+	*prev_item = (struct kdbus_item *)merge;
-+	*prev_vec = vec;
-+
-+	return merge == prev;
-+}
-+
-+static int kdbus_staging_import(struct kdbus_staging *staging)
-+{
-+	struct kdbus_item *it, *item, *last, *prev_payload;
-+	struct kdbus_gaps *gaps = staging->gaps;
-+	struct kdbus_msg *msg = staging->msg;
-+	struct iovec *part, *prev_part;
-+	bool drop_item;
-+
-+	drop_item = false;
-+	last = NULL;
-+	prev_payload = NULL;
-+	prev_part = NULL;
-+
-+	/*
-+	 * We modify msg->items along the way; make sure to use @item as offset
-+	 * to the next item (instead of the iterator @it).
-+	 */
-+	for (it = item = msg->items;
-+	     it >= msg->items &&
-+	             (u8 *)it < (u8 *)msg + msg->size &&
-+	             (u8 *)it + it->size <= (u8 *)msg + msg->size; ) {
-+		/*
-+		 * If we dropped items along the way, move current item to
-+		 * front. We must not access @it afterwards, but use @item
-+		 * instead!
-+		 */
-+		if (it != item)
-+			memmove(item, it, it->size);
-+		it = (void *)((u8 *)it + KDBUS_ALIGN8(item->size));
-+
-+		switch (item->type) {
-+		case KDBUS_ITEM_PAYLOAD_VEC: {
-+			size_t offset = staging->n_payload;
-+
-+			if (kdbus_staging_merge_vecs(staging, &prev_payload,
-+						     &prev_part, item)) {
-+				drop_item = true;
-+			} else if (item->vec.address) {
-+				/* real offset is patched later on */
-+				item->type = KDBUS_ITEM_PAYLOAD_OFF;
-+				item->vec.offset = offset;
-+			} else {
-+				item->type = KDBUS_ITEM_PAYLOAD_OFF;
-+				item->vec.offset = ~0ULL;
-+			}
-+
-+			break;
-+		}
-+		case KDBUS_ITEM_PAYLOAD_MEMFD: {
-+			struct file *f;
-+
-+			f = kdbus_get_memfd(&item->memfd);
-+			if (IS_ERR(f))
-+				return PTR_ERR(f);
-+
-+			gaps->memfd_files[gaps->n_memfds] = f;
-+			gaps->memfd_offsets[gaps->n_memfds] =
-+					(u8 *)&item->memfd.fd - (u8 *)msg;
-+			++gaps->n_memfds;
-+
-+			/* memfds cannot be merged */
-+			prev_payload = item;
-+			prev_part = NULL;
-+
-+			/* insert padding to make following VECs aligned */
-+			if (item->memfd.size % 8) {
-+				part = &staging->parts[staging->n_parts++];
-+				part->iov_len = item->memfd.size % 8;
-+				part->iov_base = (char __user *)zeros;
-+				staging->n_payload += part->iov_len;
-+			}
-+
-+			break;
-+		}
-+		case KDBUS_ITEM_FDS: {
-+			size_t i, n_fds;
-+
-+			n_fds = KDBUS_ITEM_PAYLOAD_SIZE(item) / sizeof(int);
-+			for (i = 0; i < n_fds; ++i) {
-+				struct file *f;
-+
-+				f = kdbus_get_fd(item->fds[i]);
-+				if (IS_ERR(f))
-+					return PTR_ERR(f);
-+
-+				gaps->fd_files[gaps->n_fds++] = f;
-+			}
-+
-+			gaps->fd_offset = (u8 *)item->fds - (u8 *)msg;
-+
-+			break;
-+		}
-+		case KDBUS_ITEM_BLOOM_FILTER:
-+			staging->bloom_filter = &item->bloom_filter;
-+			break;
-+		case KDBUS_ITEM_DST_NAME:
-+			staging->dst_name = item->str;
-+			break;
-+		}
-+
-+		/* drop item if we merged it with a previous one */
-+		if (drop_item) {
-+			drop_item = false;
-+		} else {
-+			last = item;
-+			item = KDBUS_ITEM_NEXT(item);
-+		}
-+	}
-+
-+	/* adjust message size regarding dropped items */
-+	msg->size = offsetof(struct kdbus_msg, items);
-+	if (last)
-+		msg->size += ((u8 *)last - (u8 *)msg->items) + last->size;
-+
-+	return 0;
-+}
-+
-+static void kdbus_staging_reserve(struct kdbus_staging *staging)
-+{
-+	struct iovec *part;
-+
-+	part = &staging->parts[staging->n_parts++];
-+	part->iov_base = (void __user *)zeros;
-+	part->iov_len = 0;
-+}
-+
-+static struct kdbus_staging *kdbus_staging_new(struct kdbus_bus *bus,
-+					       size_t n_parts,
-+					       size_t msg_extra_size)
-+{
-+	const size_t reserved_parts = 5; /* see below for explanation */
-+	struct kdbus_staging *staging;
-+	int ret;
-+
-+	n_parts += reserved_parts;
-+
-+	staging = kzalloc(sizeof(*staging) + n_parts * sizeof(*staging->parts) +
-+			  msg_extra_size, GFP_TEMPORARY);
-+	if (!staging)
-+		return ERR_PTR(-ENOMEM);
-+
-+	staging->msg_seqnum = atomic64_inc_return(&bus->last_message_id);
-+	staging->n_parts = 0; /* we reserve n_parts, but don't enforce them */
-+	staging->parts = (void *)(staging + 1);
-+
-+	if (msg_extra_size) /* if requested, allocate message, too */
-+		staging->msg = (void *)((u8 *)staging->parts +
-+				        n_parts * sizeof(*staging->parts));
-+
-+	staging->meta_proc = kdbus_meta_proc_new();
-+	if (IS_ERR(staging->meta_proc)) {
-+		ret = PTR_ERR(staging->meta_proc);
-+		staging->meta_proc = NULL;
-+		goto error;
-+	}
-+
-+	staging->meta_conn = kdbus_meta_conn_new();
-+	if (IS_ERR(staging->meta_conn)) {
-+		ret = PTR_ERR(staging->meta_conn);
-+		staging->meta_conn = NULL;
-+		goto error;
-+	}
-+
-+	/*
-+	 * Prepare iovecs to copy the message into the target pool. We use the
-+	 * following iovecs:
-+	 *   * iovec to copy "kdbus_msg.size"
-+	 *   * iovec to copy "struct kdbus_msg" (minus size) plus items
-+	 *   * iovec for possible padding after the items
-+	 *   * iovec for metadata items
-+	 *   * iovec for possible padding after the items
-+	 *
-+	 * Make sure to update @reserved_parts if you add more parts here.
-+	 */
-+
-+	kdbus_staging_reserve(staging); /* msg.size */
-+	kdbus_staging_reserve(staging); /* msg (minus msg.size) plus items */
-+	kdbus_staging_reserve(staging); /* msg padding */
-+	kdbus_staging_reserve(staging); /* meta */
-+	kdbus_staging_reserve(staging); /* meta padding */
-+
-+	return staging;
-+
-+error:
-+	kdbus_staging_free(staging);
-+	return ERR_PTR(ret);
-+}
-+
-+struct kdbus_staging *kdbus_staging_new_kernel(struct kdbus_bus *bus,
-+					       u64 dst, u64 cookie_timeout,
-+					       size_t it_size, size_t it_type)
-+{
-+	struct kdbus_staging *staging;
-+	size_t size;
-+
-+	size = offsetof(struct kdbus_msg, items) +
-+	       KDBUS_ITEM_HEADER_SIZE + it_size;
-+
-+	staging = kdbus_staging_new(bus, 0, KDBUS_ALIGN8(size));
-+	if (IS_ERR(staging))
-+		return ERR_CAST(staging);
-+
-+	staging->msg->size = size;
-+	staging->msg->flags = (dst == KDBUS_DST_ID_BROADCAST) ?
-+							KDBUS_MSG_SIGNAL : 0;
-+	staging->msg->dst_id = dst;
-+	staging->msg->src_id = KDBUS_SRC_ID_KERNEL;
-+	staging->msg->payload_type = KDBUS_PAYLOAD_KERNEL;
-+	staging->msg->cookie_reply = cookie_timeout;
-+	staging->notify = staging->msg->items;
-+	staging->notify->size = KDBUS_ITEM_HEADER_SIZE + it_size;
-+	staging->notify->type = it_type;
-+
-+	return staging;
-+}
-+
-+struct kdbus_staging *kdbus_staging_new_user(struct kdbus_bus *bus,
-+					     struct kdbus_cmd_send *cmd,
-+					     struct kdbus_msg *msg)
-+{
-+	const size_t reserved_parts = 1; /* see below for explanation */
-+	size_t n_memfds, n_fds, n_parts;
-+	struct kdbus_staging *staging;
-+	int ret;
-+
-+	/*
-+	 * Examine user-supplied message and figure out how many resources we
-+	 * need to allocate in our staging area. This requires us to iterate
-+	 * the message twice, but saves us from re-allocating our resources
-+	 * all the time.
-+	 */
-+
-+	ret = kdbus_msg_examine(msg, bus, cmd, &n_memfds, &n_fds, &n_parts);
-+	if (ret < 0)
-+		return ERR_PTR(ret);
-+
-+	n_parts += reserved_parts;
-+
-+	/*
-+	 * Allocate staging area with the number of required resources. Make
-+	 * sure that we have enough iovecs for all required parts pre-allocated
-+	 * so this will hopefully be the only memory allocation for this
-+	 * message transaction.
-+	 */
-+
-+	staging = kdbus_staging_new(bus, n_parts, 0);
-+	if (IS_ERR(staging))
-+		return ERR_CAST(staging);
-+
-+	staging->msg = msg;
-+
-+	/*
-+	 * If the message contains memfds or fd items, we need to remember some
-+	 * state so we can fill in the requested information at RECV time.
-+	 * File-descriptors cannot be passed at SEND time. Hence, allocate a
-+	 * gaps-object to remember that state. That gaps object is linked to
-+	 * from the staging area, but will also be linked to from the message
-+	 * queue of each peer. Hence, each receiver owns a reference to it, and
-+	 * it will later be used to fill the 'gaps' in message that couldn't be
-+	 * filled at SEND time.
-+	 * Note that the 'gaps' object is read-only once the staging-allocator
-+	 * returns. There might be connections receiving a queued message while
-+	 * the sender still broadcasts the message to other receivers.
-+	 */
-+
-+	if (n_memfds > 0 || n_fds > 0) {
-+		staging->gaps = kdbus_gaps_new(n_memfds, n_fds);
-+		if (IS_ERR(staging->gaps)) {
-+			ret = PTR_ERR(staging->gaps);
-+			staging->gaps = NULL;
-+			kdbus_staging_free(staging);
-+			return ERR_PTR(ret);
-+		}
-+	}
-+
-+	/*
-+	 * kdbus_staging_new() already reserves parts for message setup. For
-+	 * user-supplied messages, we add the following iovecs:
-+	 *   ... variable number of iovecs for payload ...
-+	 *   * final iovec for possible padding of payload
-+	 *
-+	 * Make sure to update @reserved_parts if you add more parts here.
-+	 */
-+
-+	ret = kdbus_staging_import(staging); /* payload */
-+	kdbus_staging_reserve(staging); /* payload padding */
-+
-+	if (ret < 0)
-+		goto error;
-+
-+	return staging;
-+
-+error:
-+	kdbus_staging_free(staging);
-+	return ERR_PTR(ret);
-+}
-+
-+struct kdbus_staging *kdbus_staging_free(struct kdbus_staging *staging)
-+{
-+	if (!staging)
-+		return NULL;
-+
-+	kdbus_meta_conn_unref(staging->meta_conn);
-+	kdbus_meta_proc_unref(staging->meta_proc);
-+	kdbus_gaps_unref(staging->gaps);
-+	kfree(staging);
-+
-+	return NULL;
-+}
-+
-+static int kdbus_staging_collect_metadata(struct kdbus_staging *staging,
-+					  struct kdbus_conn *src,
-+					  struct kdbus_conn *dst,
-+					  u64 *out_attach)
-+{
-+	u64 attach;
-+	int ret;
-+
-+	if (src)
-+		attach = kdbus_meta_msg_mask(src, dst);
-+	else
-+		attach = KDBUS_ATTACH_TIMESTAMP; /* metadata for kernel msgs */
-+
-+	if (src && !src->meta_fake) {
-+		ret = kdbus_meta_proc_collect(staging->meta_proc, attach);
-+		if (ret < 0)
-+			return ret;
-+	}
-+
-+	ret = kdbus_meta_conn_collect(staging->meta_conn, src,
-+				      staging->msg_seqnum, attach);
-+	if (ret < 0)
-+		return ret;
-+
-+	*out_attach = attach;
-+	return 0;
-+}
-+
-+/**
-+ * kdbus_staging_emit() - emit linearized message in target pool
-+ * @staging:		staging object to create message from
-+ * @src:		sender of the message (or NULL)
-+ * @dst:		target connection to allocate message for
-+ *
-+ * This allocates a pool-slice for @dst and copies the message provided by
-+ * @staging into it. The new slice is then returned to the caller for further
-+ * processing. It's not linked into any queue, yet.
-+ *
-+ * Return: Newly allocated slice or ERR_PTR on failure.
-+ */
-+struct kdbus_pool_slice *kdbus_staging_emit(struct kdbus_staging *staging,
-+					    struct kdbus_conn *src,
-+					    struct kdbus_conn *dst)
-+{
-+	struct kdbus_item *item, *meta_items = NULL;
-+	struct kdbus_pool_slice *slice = NULL;
-+	size_t off, size, meta_size;
-+	struct iovec *v;
-+	u64 attach, msg_size;
-+	int ret;
-+
-+	/*
-+	 * Step 1:
-+	 * Collect metadata from @src depending on the attach-flags allowed for
-+	 * @dst. Translate it into the namespaces pinned by @dst.
-+	 */
-+
-+	ret = kdbus_staging_collect_metadata(staging, src, dst, &attach);
-+	if (ret < 0)
-+		goto error;
-+
-+	ret = kdbus_meta_emit(staging->meta_proc, NULL, staging->meta_conn,
-+			      dst, attach, &meta_items, &meta_size);
-+	if (ret < 0)
-+		goto error;
-+
-+	/*
-+	 * Step 2:
-+	 * Setup iovecs for the message. See kdbus_staging_new() for allocation
-+	 * of those iovecs. All reserved iovecs have been initialized with
-+	 * iov_len=0 + iov_base=zeros. Furthermore, the iovecs to copy the
-+	 * actual message payload have already been initialized and need not be
-+	 * touched.
-+	 */
-+
-+	v = staging->parts;
-+	msg_size = staging->msg->size;
-+
-+	/* msg.size */
-+	v->iov_len = sizeof(msg_size);
-+	v->iov_base = (void __user *)&msg_size;
-+	++v;
-+
-+	/* msg (after msg.size) plus items */
-+	v->iov_len = staging->msg->size - sizeof(staging->msg->size);
-+	v->iov_base = (void __user *)((u8 *)staging->msg +
-+				      sizeof(staging->msg->size));
-+	++v;
-+
-+	/* padding after msg */
-+	v->iov_len = KDBUS_ALIGN8(staging->msg->size) - staging->msg->size;
-+	v->iov_base = (void __user *)zeros;
-+	++v;
-+
-+	if (meta_size > 0) {
-+		/* metadata items */
-+		v->iov_len = meta_size;
-+		v->iov_base = (void __user *)meta_items;
-+		++v;
-+
-+		/* padding after metadata */
-+		v->iov_len = KDBUS_ALIGN8(meta_size) - meta_size;
-+		v->iov_base = (void __user *)zeros;
-+		++v;
-+
-+		msg_size = KDBUS_ALIGN8(msg_size) + meta_size;
-+	} else {
-+		/* metadata items */
-+		v->iov_len = 0;
-+		v->iov_base = (void __user *)zeros;
-+		++v;
-+
-+		/* padding after metadata */
-+		v->iov_len = 0;
-+		v->iov_base = (void __user *)zeros;
-+		++v;
-+	}
-+
-+	/* ... payload iovecs are already filled in ... */
-+
-+	/* compute overall size and fill in padding after payload */
-+	size = KDBUS_ALIGN8(msg_size);
-+
-+	if (staging->n_payload > 0) {
-+		size += staging->n_payload;
-+
-+		v = &staging->parts[staging->n_parts - 1];
-+		v->iov_len = KDBUS_ALIGN8(size) - size;
-+		v->iov_base = (void __user *)zeros;
-+
-+		size = KDBUS_ALIGN8(size);
-+	}
-+
-+	/*
-+	 * Step 3:
-+	 * The PAYLOAD_OFF items in the message contain a relative 'offset'
-+	 * field that tells the receiver where to find the actual payload. This
-+	 * offset is relative to the start of the message, and as such depends
-+	 * on the size of the metadata items we inserted. This size is variable
-+	 * and changes for each peer we send the message to. Hence, we remember
-+	 * the last relative offset that was used to calculate the 'offset'
-+	 * fields. For each message, we re-calculate it and patch all items, in
-+	 * case it changed.
-+	 */
-+
-+	off = KDBUS_ALIGN8(msg_size);
-+
-+	if (off != staging->i_payload) {
-+		KDBUS_ITEMS_FOREACH(item, staging->msg->items,
-+				    KDBUS_ITEMS_SIZE(staging->msg, items)) {
-+			if (item->type != KDBUS_ITEM_PAYLOAD_OFF)
-+				continue;
-+
-+			item->vec.offset -= staging->i_payload;
-+			item->vec.offset += off;
-+		}
-+
-+		staging->i_payload = off;
-+	}
-+
-+	/*
-+	 * Step 4:
-+	 * Allocate pool slice and copy over all data. Make sure to properly
-+	 * account on user quota.
-+	 */
-+
-+	ret = kdbus_conn_quota_inc(dst, src ? src->user : NULL, size,
-+				   staging->gaps ? staging->gaps->n_fds : 0);
-+	if (ret < 0)
-+		goto error;
-+
-+	slice = kdbus_pool_slice_alloc(dst->pool, size, true);
-+	if (IS_ERR(slice)) {
-+		ret = PTR_ERR(slice);
-+		slice = NULL;
-+		goto error;
-+	}
-+
-+	WARN_ON(kdbus_pool_slice_size(slice) != size);
-+
-+	ret = kdbus_pool_slice_copy_iovec(slice, 0, staging->parts,
-+					  staging->n_parts, size);
-+	if (ret < 0)
-+		goto error;
-+
-+	/* all done, return slice to caller */
-+	goto exit;
-+
-+error:
-+	if (slice)
-+		kdbus_conn_quota_dec(dst, src ? src->user : NULL, size,
-+				     staging->gaps ? staging->gaps->n_fds : 0);
-+	kdbus_pool_slice_release(slice);
-+	slice = ERR_PTR(ret);
-+exit:
-+	kfree(meta_items);
-+	return slice;
-+}
-diff --git a/ipc/kdbus/message.h b/ipc/kdbus/message.h
-new file mode 100644
-index 0000000..298f9c9
---- /dev/null
-+++ b/ipc/kdbus/message.h
-@@ -0,0 +1,120 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#ifndef __KDBUS_MESSAGE_H
-+#define __KDBUS_MESSAGE_H
-+
-+#include <linux/fs.h>
-+#include <linux/kref.h>
-+#include <uapi/linux/kdbus.h>
-+
-+struct kdbus_bus;
-+struct kdbus_conn;
-+struct kdbus_meta_conn;
-+struct kdbus_meta_proc;
-+struct kdbus_pool_slice;
-+
-+/**
-+ * struct kdbus_gaps - gaps in message to be filled later
-+ * @kref:		Reference counter
-+ * @n_memfd_offs:	Number of memfds
-+ * @memfd_offs:		Offsets of kdbus_memfd items in target slice
-+ * @n_fds:		Number of fds
-+ * @fds:		Array of sent fds
-+ * @fds_offset:		Offset of fd-array in target slice
-+ *
-+ * The 'gaps' object is used to track data that is needed to fill gaps in a
-+ * message at RECV time. Usually, we try to compile the whole message at SEND
-+ * time. This has the advantage, that we don't have to cache any information and
-+ * can keep the memory consumption small. Furthermore, all copy operations can
-+ * be combined into a single function call, which speeds up transactions
-+ * considerably.
-+ * However, things like file-descriptors can only be fully installed at RECV
-+ * time. The gaps object tracks this data and pins it until a message is
-+ * received. The gaps object is shared between all receivers of the same
-+ * message.
-+ */
-+struct kdbus_gaps {
-+	struct kref kref;
-+
-+	/* state tracking for KDBUS_ITEM_PAYLOAD_MEMFD entries */
-+	size_t n_memfds;
-+	u64 *memfd_offsets;
-+	struct file **memfd_files;
-+
-+	/* state tracking for KDBUS_ITEM_FDS */
-+	size_t n_fds;
-+	struct file **fd_files;
-+	u64 fd_offset;
-+};
-+
-+struct kdbus_gaps *kdbus_gaps_ref(struct kdbus_gaps *gaps);
-+struct kdbus_gaps *kdbus_gaps_unref(struct kdbus_gaps *gaps);
-+int kdbus_gaps_install(struct kdbus_gaps *gaps, struct kdbus_pool_slice *slice,
-+		       bool *out_incomplete);
-+
-+/**
-+ * struct kdbus_staging - staging area to import messages
-+ * @msg:		User-supplied message
-+ * @gaps:		Gaps-object created during import (or NULL if empty)
-+ * @msg_seqnum:		Message sequence number
-+ * @notify_entry:	Entry into list of kernel-generated notifications
-+ * @i_payload:		Current relative index of start of payload
-+ * @n_payload:		Total number of bytes needed for payload
-+ * @n_parts:		Number of parts
-+ * @parts:		Array of iovecs that make up the whole message
-+ * @meta_proc:		Process metadata of the sender (or NULL if empty)
-+ * @meta_conn:		Connection metadata of the sender (or NULL if empty)
-+ * @bloom_filter:	Pointer to the bloom-item in @msg, or NULL
-+ * @dst_name:		Pointer to the dst-name-item in @msg, or NULL
-+ * @notify:		Pointer to the notification item in @msg, or NULL
-+ *
-+ * The kdbus_staging object is a temporary staging area to import user-supplied
-+ * messages into the kernel. It is only used during SEND and dropped once the
-+ * message is queued. Any data that cannot be collected during SEND, is
-+ * collected in a kdbus_gaps object and attached to the message queue.
-+ */
-+struct kdbus_staging {
-+	struct kdbus_msg *msg;
-+	struct kdbus_gaps *gaps;
-+	u64 msg_seqnum;
-+	struct list_head notify_entry;
-+
-+	/* crafted iovecs to copy the message */
-+	size_t i_payload;
-+	size_t n_payload;
-+	size_t n_parts;
-+	struct iovec *parts;
-+
-+	/* metadata state */
-+	struct kdbus_meta_proc *meta_proc;
-+	struct kdbus_meta_conn *meta_conn;
-+
-+	/* cached pointers into @msg */
-+	const struct kdbus_bloom_filter *bloom_filter;
-+	const char *dst_name;
-+	struct kdbus_item *notify;
-+};
-+
-+struct kdbus_staging *kdbus_staging_new_kernel(struct kdbus_bus *bus,
-+					       u64 dst, u64 cookie_timeout,
-+					       size_t it_size, size_t it_type);
-+struct kdbus_staging *kdbus_staging_new_user(struct kdbus_bus *bus,
-+					     struct kdbus_cmd_send *cmd,
-+					     struct kdbus_msg *msg);
-+struct kdbus_staging *kdbus_staging_free(struct kdbus_staging *staging);
-+struct kdbus_pool_slice *kdbus_staging_emit(struct kdbus_staging *staging,
-+					    struct kdbus_conn *src,
-+					    struct kdbus_conn *dst);
-+
-+#endif
-diff --git a/ipc/kdbus/metadata.c b/ipc/kdbus/metadata.c
-new file mode 100644
-index 0000000..71ca475
---- /dev/null
-+++ b/ipc/kdbus/metadata.c
-@@ -0,0 +1,1347 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ * Copyright (C) 2014-2015 Djalal Harouni <tixxdz@××××××.org>
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#include <linux/audit.h>
-+#include <linux/capability.h>
-+#include <linux/cgroup.h>
-+#include <linux/cred.h>
-+#include <linux/file.h>
-+#include <linux/fs_struct.h>
-+#include <linux/init.h>
-+#include <linux/kref.h>
-+#include <linux/mutex.h>
-+#include <linux/sched.h>
-+#include <linux/security.h>
-+#include <linux/sizes.h>
-+#include <linux/slab.h>
-+#include <linux/uaccess.h>
-+#include <linux/uidgid.h>
-+#include <linux/uio.h>
-+#include <linux/user_namespace.h>
-+
-+#include "bus.h"
-+#include "connection.h"
-+#include "endpoint.h"
-+#include "item.h"
-+#include "message.h"
-+#include "metadata.h"
-+#include "names.h"
-+
-+/**
-+ * struct kdbus_meta_proc - Process metadata
-+ * @kref:		Reference counting
-+ * @lock:		Object lock
-+ * @collected:		Bitmask of collected items
-+ * @valid:		Bitmask of collected and valid items
-+ * @cred:		Credentials
-+ * @pid:		PID of process
-+ * @tgid:		TGID of process
-+ * @ppid:		PPID of process
-+ * @tid_comm:		TID comm line
-+ * @pid_comm:		PID comm line
-+ * @exe_path:		Executable path
-+ * @root_path:		Root-FS path
-+ * @cmdline:		Command-line
-+ * @cgroup:		Full cgroup path
-+ * @seclabel:		Seclabel
-+ * @audit_loginuid:	Audit login-UID
-+ * @audit_sessionid:	Audit session-ID
-+ */
-+struct kdbus_meta_proc {
-+	struct kref kref;
-+	struct mutex lock;
-+	u64 collected;
-+	u64 valid;
-+
-+	/* KDBUS_ITEM_CREDS */
-+	/* KDBUS_ITEM_AUXGROUPS */
-+	/* KDBUS_ITEM_CAPS */
-+	const struct cred *cred;
-+
-+	/* KDBUS_ITEM_PIDS */
-+	struct pid *pid;
-+	struct pid *tgid;
-+	struct pid *ppid;
-+
-+	/* KDBUS_ITEM_TID_COMM */
-+	char tid_comm[TASK_COMM_LEN];
-+	/* KDBUS_ITEM_PID_COMM */
-+	char pid_comm[TASK_COMM_LEN];
-+
-+	/* KDBUS_ITEM_EXE */
-+	struct path exe_path;
-+	struct path root_path;
-+
-+	/* KDBUS_ITEM_CMDLINE */
-+	char *cmdline;
-+
-+	/* KDBUS_ITEM_CGROUP */
-+	char *cgroup;
-+
-+	/* KDBUS_ITEM_SECLABEL */
-+	char *seclabel;
-+
-+	/* KDBUS_ITEM_AUDIT */
-+	kuid_t audit_loginuid;
-+	unsigned int audit_sessionid;
-+};
-+
-+/**
-+ * struct kdbus_meta_conn
-+ * @kref:		Reference counting
-+ * @lock:		Object lock
-+ * @collected:		Bitmask of collected items
-+ * @valid:		Bitmask of collected and valid items
-+ * @ts:			Timestamp values
-+ * @owned_names_items:	Serialized items for owned names
-+ * @owned_names_size:	Size of @owned_names_items
-+ * @conn_description:	Connection description
-+ */
-+struct kdbus_meta_conn {
-+	struct kref kref;
-+	struct mutex lock;
-+	u64 collected;
-+	u64 valid;
-+
-+	/* KDBUS_ITEM_TIMESTAMP */
-+	struct kdbus_timestamp ts;
-+
-+	/* KDBUS_ITEM_OWNED_NAME */
-+	struct kdbus_item *owned_names_items;
-+	size_t owned_names_size;
-+
-+	/* KDBUS_ITEM_CONN_DESCRIPTION */
-+	char *conn_description;
-+};
-+
-+/* fixed size equivalent of "kdbus_caps" */
-+struct kdbus_meta_caps {
-+	u32 last_cap;
-+	struct {
-+		u32 caps[_KERNEL_CAPABILITY_U32S];
-+	} set[4];
-+};
-+
-+/**
-+ * kdbus_meta_proc_new() - Create process metadata object
-+ *
-+ * Return: Pointer to new object on success, ERR_PTR on failure.
-+ */
-+struct kdbus_meta_proc *kdbus_meta_proc_new(void)
-+{
-+	struct kdbus_meta_proc *mp;
-+
-+	mp = kzalloc(sizeof(*mp), GFP_KERNEL);
-+	if (!mp)
-+		return ERR_PTR(-ENOMEM);
-+
-+	kref_init(&mp->kref);
-+	mutex_init(&mp->lock);
-+
-+	return mp;
-+}
-+
-+static void kdbus_meta_proc_free(struct kref *kref)
-+{
-+	struct kdbus_meta_proc *mp = container_of(kref, struct kdbus_meta_proc,
-+						  kref);
-+
-+	path_put(&mp->exe_path);
-+	path_put(&mp->root_path);
-+	if (mp->cred)
-+		put_cred(mp->cred);
-+	put_pid(mp->ppid);
-+	put_pid(mp->tgid);
-+	put_pid(mp->pid);
-+
-+	kfree(mp->seclabel);
-+	kfree(mp->cmdline);
-+	kfree(mp->cgroup);
-+	kfree(mp);
-+}
-+
-+/**
-+ * kdbus_meta_proc_ref() - Gain reference
-+ * @mp:		Process metadata object
-+ *
-+ * Return: @mp is returned
-+ */
-+struct kdbus_meta_proc *kdbus_meta_proc_ref(struct kdbus_meta_proc *mp)
-+{
-+	if (mp)
-+		kref_get(&mp->kref);
-+	return mp;
-+}
-+
-+/**
-+ * kdbus_meta_proc_unref() - Drop reference
-+ * @mp:		Process metadata object
-+ *
-+ * Return: NULL
-+ */
-+struct kdbus_meta_proc *kdbus_meta_proc_unref(struct kdbus_meta_proc *mp)
-+{
-+	if (mp)
-+		kref_put(&mp->kref, kdbus_meta_proc_free);
-+	return NULL;
-+}
-+
-+static void kdbus_meta_proc_collect_pids(struct kdbus_meta_proc *mp)
-+{
-+	struct task_struct *parent;
-+
-+	mp->pid = get_pid(task_pid(current));
-+	mp->tgid = get_pid(task_tgid(current));
-+
-+	rcu_read_lock();
-+	parent = rcu_dereference(current->real_parent);
-+	mp->ppid = get_pid(task_tgid(parent));
-+	rcu_read_unlock();
-+
-+	mp->valid |= KDBUS_ATTACH_PIDS;
-+}
-+
-+static void kdbus_meta_proc_collect_tid_comm(struct kdbus_meta_proc *mp)
-+{
-+	get_task_comm(mp->tid_comm, current);
-+	mp->valid |= KDBUS_ATTACH_TID_COMM;
-+}
-+
-+static void kdbus_meta_proc_collect_pid_comm(struct kdbus_meta_proc *mp)
-+{
-+	get_task_comm(mp->pid_comm, current->group_leader);
-+	mp->valid |= KDBUS_ATTACH_PID_COMM;
-+}
-+
-+static void kdbus_meta_proc_collect_exe(struct kdbus_meta_proc *mp)
-+{
-+	struct file *exe_file;
-+
-+	rcu_read_lock();
-+	exe_file = rcu_dereference(current->mm->exe_file);
-+	if (exe_file) {
-+		mp->exe_path = exe_file->f_path;
-+		path_get(&mp->exe_path);
-+		get_fs_root(current->fs, &mp->root_path);
-+		mp->valid |= KDBUS_ATTACH_EXE;
-+	}
-+	rcu_read_unlock();
-+}
-+
-+static int kdbus_meta_proc_collect_cmdline(struct kdbus_meta_proc *mp)
-+{
-+	struct mm_struct *mm = current->mm;
-+	char *cmdline;
-+
-+	if (!mm->arg_end)
-+		return 0;
-+
-+	cmdline = strndup_user((const char __user *)mm->arg_start,
-+			       mm->arg_end - mm->arg_start);
-+	if (IS_ERR(cmdline))
-+		return PTR_ERR(cmdline);
-+
-+	mp->cmdline = cmdline;
-+	mp->valid |= KDBUS_ATTACH_CMDLINE;
-+
-+	return 0;
-+}
-+
-+static int kdbus_meta_proc_collect_cgroup(struct kdbus_meta_proc *mp)
-+{
-+#ifdef CONFIG_CGROUPS
-+	void *page;
-+	char *s;
-+
-+	page = (void *)__get_free_page(GFP_TEMPORARY);
-+	if (!page)
-+		return -ENOMEM;
-+
-+	s = task_cgroup_path(current, page, PAGE_SIZE);
-+	if (s) {
-+		mp->cgroup = kstrdup(s, GFP_KERNEL);
-+		if (!mp->cgroup) {
-+			free_page((unsigned long)page);
-+			return -ENOMEM;
-+		}
-+	}
-+
-+	free_page((unsigned long)page);
-+	mp->valid |= KDBUS_ATTACH_CGROUP;
-+#endif
-+
-+	return 0;
-+}
-+
-+static int kdbus_meta_proc_collect_seclabel(struct kdbus_meta_proc *mp)
-+{
-+#ifdef CONFIG_SECURITY
-+	char *ctx = NULL;
-+	u32 sid, len;
-+	int ret;
-+
-+	security_task_getsecid(current, &sid);
-+	ret = security_secid_to_secctx(sid, &ctx, &len);
-+	if (ret < 0) {
-+		/*
-+		 * EOPNOTSUPP means no security module is active,
-+		 * lets skip adding the seclabel then. This effectively
-+		 * drops the SECLABEL item.
-+		 */
-+		return (ret == -EOPNOTSUPP) ? 0 : ret;
-+	}
-+
-+	mp->seclabel = kstrdup(ctx, GFP_KERNEL);
-+	security_release_secctx(ctx, len);
-+	if (!mp->seclabel)
-+		return -ENOMEM;
-+
-+	mp->valid |= KDBUS_ATTACH_SECLABEL;
-+#endif
-+
-+	return 0;
-+}
-+
-+static void kdbus_meta_proc_collect_audit(struct kdbus_meta_proc *mp)
-+{
-+#ifdef CONFIG_AUDITSYSCALL
-+	mp->audit_loginuid = audit_get_loginuid(current);
-+	mp->audit_sessionid = audit_get_sessionid(current);
-+	mp->valid |= KDBUS_ATTACH_AUDIT;
-+#endif
-+}
-+
-+/**
-+ * kdbus_meta_proc_collect() - Collect process metadata
-+ * @mp:		Process metadata object
-+ * @what:	Attach flags to collect
-+ *
-+ * This collects process metadata from current and saves it in @mp.
-+ *
-+ * Return: 0 on success, negative error code on failure.
-+ */
-+int kdbus_meta_proc_collect(struct kdbus_meta_proc *mp, u64 what)
-+{
-+	int ret;
-+
-+	if (!mp || !(what & (KDBUS_ATTACH_CREDS |
-+			     KDBUS_ATTACH_PIDS |
-+			     KDBUS_ATTACH_AUXGROUPS |
-+			     KDBUS_ATTACH_TID_COMM |
-+			     KDBUS_ATTACH_PID_COMM |
-+			     KDBUS_ATTACH_EXE |
-+			     KDBUS_ATTACH_CMDLINE |
-+			     KDBUS_ATTACH_CGROUP |
-+			     KDBUS_ATTACH_CAPS |
-+			     KDBUS_ATTACH_SECLABEL |
-+			     KDBUS_ATTACH_AUDIT)))
-+		return 0;
-+
-+	mutex_lock(&mp->lock);
-+
-+	/* creds, auxgrps and caps share "struct cred" as context */
-+	{
-+		const u64 m_cred = KDBUS_ATTACH_CREDS |
-+				   KDBUS_ATTACH_AUXGROUPS |
-+				   KDBUS_ATTACH_CAPS;
-+
-+		if ((what & m_cred) && !(mp->collected & m_cred)) {
-+			mp->cred = get_current_cred();
-+			mp->valid |= m_cred;
-+			mp->collected |= m_cred;
-+		}
-+	}
-+
-+	if ((what & KDBUS_ATTACH_PIDS) &&
-+	    !(mp->collected & KDBUS_ATTACH_PIDS)) {
-+		kdbus_meta_proc_collect_pids(mp);
-+		mp->collected |= KDBUS_ATTACH_PIDS;
-+	}
-+
-+	if ((what & KDBUS_ATTACH_TID_COMM) &&
-+	    !(mp->collected & KDBUS_ATTACH_TID_COMM)) {
-+		kdbus_meta_proc_collect_tid_comm(mp);
-+		mp->collected |= KDBUS_ATTACH_TID_COMM;
-+	}
-+
-+	if ((what & KDBUS_ATTACH_PID_COMM) &&
-+	    !(mp->collected & KDBUS_ATTACH_PID_COMM)) {
-+		kdbus_meta_proc_collect_pid_comm(mp);
-+		mp->collected |= KDBUS_ATTACH_PID_COMM;
-+	}
-+
-+	if ((what & KDBUS_ATTACH_EXE) &&
-+	    !(mp->collected & KDBUS_ATTACH_EXE)) {
-+		kdbus_meta_proc_collect_exe(mp);
-+		mp->collected |= KDBUS_ATTACH_EXE;
-+	}
-+
-+	if ((what & KDBUS_ATTACH_CMDLINE) &&
-+	    !(mp->collected & KDBUS_ATTACH_CMDLINE)) {
-+		ret = kdbus_meta_proc_collect_cmdline(mp);
-+		if (ret < 0)
-+			goto exit_unlock;
-+		mp->collected |= KDBUS_ATTACH_CMDLINE;
-+	}
-+
-+	if ((what & KDBUS_ATTACH_CGROUP) &&
-+	    !(mp->collected & KDBUS_ATTACH_CGROUP)) {
-+		ret = kdbus_meta_proc_collect_cgroup(mp);
-+		if (ret < 0)
-+			goto exit_unlock;
-+		mp->collected |= KDBUS_ATTACH_CGROUP;
-+	}
-+
-+	if ((what & KDBUS_ATTACH_SECLABEL) &&
-+	    !(mp->collected & KDBUS_ATTACH_SECLABEL)) {
-+		ret = kdbus_meta_proc_collect_seclabel(mp);
-+		if (ret < 0)
-+			goto exit_unlock;
-+		mp->collected |= KDBUS_ATTACH_SECLABEL;
-+	}
-+
-+	if ((what & KDBUS_ATTACH_AUDIT) &&
-+	    !(mp->collected & KDBUS_ATTACH_AUDIT)) {
-+		kdbus_meta_proc_collect_audit(mp);
-+		mp->collected |= KDBUS_ATTACH_AUDIT;
-+	}
-+
-+	ret = 0;
-+
-+exit_unlock:
-+	mutex_unlock(&mp->lock);
-+	return ret;
-+}
-+
-+/**
-+ * kdbus_meta_fake_new() - Create fake metadata object
-+ *
-+ * Return: Pointer to new object on success, ERR_PTR on failure.
-+ */
-+struct kdbus_meta_fake *kdbus_meta_fake_new(void)
-+{
-+	struct kdbus_meta_fake *mf;
-+
-+	mf = kzalloc(sizeof(*mf), GFP_KERNEL);
-+	if (!mf)
-+		return ERR_PTR(-ENOMEM);
-+
-+	return mf;
-+}
-+
-+/**
-+ * kdbus_meta_fake_free() - Free fake metadata object
-+ * @mf:		Fake metadata object
-+ *
-+ * Return: NULL
-+ */
-+struct kdbus_meta_fake *kdbus_meta_fake_free(struct kdbus_meta_fake *mf)
-+{
-+	if (mf) {
-+		put_pid(mf->ppid);
-+		put_pid(mf->tgid);
-+		put_pid(mf->pid);
-+		kfree(mf->seclabel);
-+		kfree(mf);
-+	}
-+
-+	return NULL;
-+}
-+
-+/**
-+ * kdbus_meta_fake_collect() - Fill fake metadata from faked credentials
-+ * @mf:		Fake metadata object
-+ * @creds:	Creds to set, may be %NULL
-+ * @pids:	PIDs to set, may be %NULL
-+ * @seclabel:	Seclabel to set, may be %NULL
-+ *
-+ * This function takes information stored in @creds, @pids and @seclabel and
-+ * resolves them to kernel-representations, if possible. This call uses the
-+ * current task's namespaces to resolve the given information.
-+ *
-+ * Return: 0 on success, negative error code on failure.
-+ */
-+int kdbus_meta_fake_collect(struct kdbus_meta_fake *mf,
-+			    const struct kdbus_creds *creds,
-+			    const struct kdbus_pids *pids,
-+			    const char *seclabel)
-+{
-+	if (mf->valid)
-+		return -EALREADY;
-+
-+	if (creds) {
-+		struct user_namespace *ns = current_user_ns();
-+
-+		mf->uid		= make_kuid(ns, creds->uid);
-+		mf->euid	= make_kuid(ns, creds->euid);
-+		mf->suid	= make_kuid(ns, creds->suid);
-+		mf->fsuid	= make_kuid(ns, creds->fsuid);
-+
-+		mf->gid		= make_kgid(ns, creds->gid);
-+		mf->egid	= make_kgid(ns, creds->egid);
-+		mf->sgid	= make_kgid(ns, creds->sgid);
-+		mf->fsgid	= make_kgid(ns, creds->fsgid);
-+
-+		if ((creds->uid   != (uid_t)-1 && !uid_valid(mf->uid))   ||
-+		    (creds->euid  != (uid_t)-1 && !uid_valid(mf->euid))  ||
-+		    (creds->suid  != (uid_t)-1 && !uid_valid(mf->suid))  ||
-+		    (creds->fsuid != (uid_t)-1 && !uid_valid(mf->fsuid)) ||
-+		    (creds->gid   != (gid_t)-1 && !gid_valid(mf->gid))   ||
-+		    (creds->egid  != (gid_t)-1 && !gid_valid(mf->egid))  ||
-+		    (creds->sgid  != (gid_t)-1 && !gid_valid(mf->sgid))  ||
-+		    (creds->fsgid != (gid_t)-1 && !gid_valid(mf->fsgid)))
-+			return -EINVAL;
-+
-+		mf->valid |= KDBUS_ATTACH_CREDS;
-+	}
-+
-+	if (pids) {
-+		mf->pid = get_pid(find_vpid(pids->tid));
-+		mf->tgid = get_pid(find_vpid(pids->pid));
-+		mf->ppid = get_pid(find_vpid(pids->ppid));
-+
-+		if ((pids->tid != 0 && !mf->pid) ||
-+		    (pids->pid != 0 && !mf->tgid) ||
-+		    (pids->ppid != 0 && !mf->ppid)) {
-+			put_pid(mf->pid);
-+			put_pid(mf->tgid);
-+			put_pid(mf->ppid);
-+			mf->pid = NULL;
-+			mf->tgid = NULL;
-+			mf->ppid = NULL;
-+			return -EINVAL;
-+		}
-+
-+		mf->valid |= KDBUS_ATTACH_PIDS;
-+	}
-+
-+	if (seclabel) {
-+		mf->seclabel = kstrdup(seclabel, GFP_KERNEL);
-+		if (!mf->seclabel)
-+			return -ENOMEM;
-+
-+		mf->valid |= KDBUS_ATTACH_SECLABEL;
-+	}
-+
-+	return 0;
-+}
-+
-+/**
-+ * kdbus_meta_conn_new() - Create connection metadata object
-+ *
-+ * Return: Pointer to new object on success, ERR_PTR on failure.
-+ */
-+struct kdbus_meta_conn *kdbus_meta_conn_new(void)
-+{
-+	struct kdbus_meta_conn *mc;
-+
-+	mc = kzalloc(sizeof(*mc), GFP_KERNEL);
-+	if (!mc)
-+		return ERR_PTR(-ENOMEM);
-+
-+	kref_init(&mc->kref);
-+	mutex_init(&mc->lock);
-+
-+	return mc;
-+}
-+
-+static void kdbus_meta_conn_free(struct kref *kref)
-+{
-+	struct kdbus_meta_conn *mc =
-+		container_of(kref, struct kdbus_meta_conn, kref);
-+
-+	kfree(mc->conn_description);
-+	kfree(mc->owned_names_items);
-+	kfree(mc);
-+}
-+
-+/**
-+ * kdbus_meta_conn_ref() - Gain reference
-+ * @mc:		Connection metadata object
-+ */
-+struct kdbus_meta_conn *kdbus_meta_conn_ref(struct kdbus_meta_conn *mc)
-+{
-+	if (mc)
-+		kref_get(&mc->kref);
-+	return mc;
-+}
-+
-+/**
-+ * kdbus_meta_conn_unref() - Drop reference
-+ * @mc:		Connection metadata object
-+ */
-+struct kdbus_meta_conn *kdbus_meta_conn_unref(struct kdbus_meta_conn *mc)
-+{
-+	if (mc)
-+		kref_put(&mc->kref, kdbus_meta_conn_free);
-+	return NULL;
-+}
-+
-+static void kdbus_meta_conn_collect_timestamp(struct kdbus_meta_conn *mc,
-+					      u64 msg_seqnum)
-+{
-+	mc->ts.monotonic_ns = ktime_get_ns();
-+	mc->ts.realtime_ns = ktime_get_real_ns();
-+
-+	if (msg_seqnum)
-+		mc->ts.seqnum = msg_seqnum;
-+
-+	mc->valid |= KDBUS_ATTACH_TIMESTAMP;
-+}
-+
-+static int kdbus_meta_conn_collect_names(struct kdbus_meta_conn *mc,
-+					 struct kdbus_conn *conn)
-+{
-+	const struct kdbus_name_owner *owner;
-+	struct kdbus_item *item;
-+	size_t slen, size;
-+
-+	lockdep_assert_held(&conn->ep->bus->name_registry->rwlock);
-+
-+	size = 0;
-+	/* open-code length calculation to avoid final padding */
-+	list_for_each_entry(owner, &conn->names_list, conn_entry)
-+		if (!(owner->flags & KDBUS_NAME_IN_QUEUE))
-+			size = KDBUS_ALIGN8(size) + KDBUS_ITEM_HEADER_SIZE +
-+				sizeof(struct kdbus_name) +
-+				strlen(owner->name->name) + 1;
-+
-+	if (!size)
-+		return 0;
-+
-+	/* make sure we include zeroed padding for convenience helpers */
-+	item = kmalloc(KDBUS_ALIGN8(size), GFP_KERNEL);
-+	if (!item)
-+		return -ENOMEM;
-+
-+	mc->owned_names_items = item;
-+	mc->owned_names_size = size;
-+
-+	list_for_each_entry(owner, &conn->names_list, conn_entry) {
-+		if (owner->flags & KDBUS_NAME_IN_QUEUE)
-+			continue;
-+
-+		slen = strlen(owner->name->name) + 1;
-+		kdbus_item_set(item, KDBUS_ITEM_OWNED_NAME, NULL,
-+			       sizeof(struct kdbus_name) + slen);
-+		item->name.flags = owner->flags;
-+		memcpy(item->name.name, owner->name->name, slen);
-+		item = KDBUS_ITEM_NEXT(item);
-+	}
-+
-+	/* sanity check: the buffer should be completely written now */
-+	WARN_ON((u8 *)item !=
-+			(u8 *)mc->owned_names_items + KDBUS_ALIGN8(size));
-+
-+	mc->valid |= KDBUS_ATTACH_NAMES;
-+	return 0;
-+}
-+
-+static int kdbus_meta_conn_collect_description(struct kdbus_meta_conn *mc,
-+					       struct kdbus_conn *conn)
-+{
-+	if (!conn->description)
-+		return 0;
-+
-+	mc->conn_description = kstrdup(conn->description, GFP_KERNEL);
-+	if (!mc->conn_description)
-+		return -ENOMEM;
-+
-+	mc->valid |= KDBUS_ATTACH_CONN_DESCRIPTION;
-+	return 0;
-+}
-+
-+/**
-+ * kdbus_meta_conn_collect() - Collect connection metadata
-+ * @mc:		Message metadata object
-+ * @conn:	Connection to collect data from
-+ * @msg_seqnum:	Sequence number of the message to send
-+ * @what:	Attach flags to collect
-+ *
-+ * This collects connection metadata from @msg_seqnum and @conn and saves it
-+ * in @mc.
-+ *
-+ * If KDBUS_ATTACH_NAMES is set in @what and @conn is non-NULL, the caller must
-+ * hold the name-registry read-lock of conn->ep->bus->registry.
-+ *
-+ * Return: 0 on success, negative error code on failure.
-+ */
-+int kdbus_meta_conn_collect(struct kdbus_meta_conn *mc,
-+			    struct kdbus_conn *conn,
-+			    u64 msg_seqnum, u64 what)
-+{
-+	int ret;
-+
-+	if (!mc || !(what & (KDBUS_ATTACH_TIMESTAMP |
-+			     KDBUS_ATTACH_NAMES |
-+			     KDBUS_ATTACH_CONN_DESCRIPTION)))
-+		return 0;
-+
-+	mutex_lock(&mc->lock);
-+
-+	if (msg_seqnum && (what & KDBUS_ATTACH_TIMESTAMP) &&
-+	    !(mc->collected & KDBUS_ATTACH_TIMESTAMP)) {
-+		kdbus_meta_conn_collect_timestamp(mc, msg_seqnum);
-+		mc->collected |= KDBUS_ATTACH_TIMESTAMP;
-+	}
-+
-+	if (conn && (what & KDBUS_ATTACH_NAMES) &&
-+	    !(mc->collected & KDBUS_ATTACH_NAMES)) {
-+		ret = kdbus_meta_conn_collect_names(mc, conn);
-+		if (ret < 0)
-+			goto exit_unlock;
-+		mc->collected |= KDBUS_ATTACH_NAMES;
-+	}
-+
-+	if (conn && (what & KDBUS_ATTACH_CONN_DESCRIPTION) &&
-+	    !(mc->collected & KDBUS_ATTACH_CONN_DESCRIPTION)) {
-+		ret = kdbus_meta_conn_collect_description(mc, conn);
-+		if (ret < 0)
-+			goto exit_unlock;
-+		mc->collected |= KDBUS_ATTACH_CONN_DESCRIPTION;
-+	}
-+
-+	ret = 0;
-+
-+exit_unlock:
-+	mutex_unlock(&mc->lock);
-+	return ret;
-+}
-+
-+static void kdbus_meta_export_caps(struct kdbus_meta_caps *out,
-+				   const struct kdbus_meta_proc *mp,
-+				   struct user_namespace *user_ns)
-+{
-+	struct user_namespace *iter;
-+	const struct cred *cred = mp->cred;
-+	bool parent = false, owner = false;
-+	int i;
-+
-+	/*
-+	 * This translates the effective capabilities of 'cred' into the given
-+	 * user-namespace. If the given user-namespace is a child-namespace of
-+	 * the user-namespace of 'cred', the mask can be copied verbatim. If
-+	 * not, the mask is cleared.
-+	 * There's one exception: If 'cred' is the owner of any user-namespace
-+	 * in the path between the given user-namespace and the user-namespace
-+	 * of 'cred', then it has all effective capabilities set. This means,
-+	 * the user who created a user-namespace always has all effective
-+	 * capabilities in any child namespaces. Note that this is based on the
-+	 * uid of the namespace creator, not the task hierarchy.
-+	 */
-+	for (iter = user_ns; iter; iter = iter->parent) {
-+		if (iter == cred->user_ns) {
-+			parent = true;
-+			break;
-+		}
-+
-+		if (iter == &init_user_ns)
-+			break;
-+
-+		if ((iter->parent == cred->user_ns) &&
-+		    uid_eq(iter->owner, cred->euid)) {
-+			owner = true;
-+			break;
-+		}
-+	}
-+
-+	out->last_cap = CAP_LAST_CAP;
-+
-+	CAP_FOR_EACH_U32(i) {
-+		if (parent) {
-+			out->set[0].caps[i] = cred->cap_inheritable.cap[i];
-+			out->set[1].caps[i] = cred->cap_permitted.cap[i];
-+			out->set[2].caps[i] = cred->cap_effective.cap[i];
-+			out->set[3].caps[i] = cred->cap_bset.cap[i];
-+		} else if (owner) {
-+			out->set[0].caps[i] = 0U;
-+			out->set[1].caps[i] = ~0U;
-+			out->set[2].caps[i] = ~0U;
-+			out->set[3].caps[i] = ~0U;
-+		} else {
-+			out->set[0].caps[i] = 0U;
-+			out->set[1].caps[i] = 0U;
-+			out->set[2].caps[i] = 0U;
-+			out->set[3].caps[i] = 0U;
-+		}
-+	}
-+
-+	/* clear unused bits */
-+	for (i = 0; i < 4; i++)
-+		out->set[i].caps[CAP_TO_INDEX(CAP_LAST_CAP)] &=
-+					CAP_LAST_U32_VALID_MASK;
-+}
-+
-+/* This is equivalent to from_kuid_munged(), but maps INVALID_UID to itself */
-+static uid_t kdbus_from_kuid_keep(struct user_namespace *ns, kuid_t uid)
-+{
-+	return uid_valid(uid) ? from_kuid_munged(ns, uid) : ((uid_t)-1);
-+}
-+
-+/* This is equivalent to from_kgid_munged(), but maps INVALID_GID to itself */
-+static gid_t kdbus_from_kgid_keep(struct user_namespace *ns, kgid_t gid)
-+{
-+	return gid_valid(gid) ? from_kgid_munged(ns, gid) : ((gid_t)-1);
-+}
-+
-+struct kdbus_meta_staging {
-+	const struct kdbus_meta_proc *mp;
-+	const struct kdbus_meta_fake *mf;
-+	const struct kdbus_meta_conn *mc;
-+	const struct kdbus_conn *conn;
-+	u64 mask;
-+
-+	void *exe;
-+	const char *exe_path;
-+};
-+
-+static size_t kdbus_meta_measure(struct kdbus_meta_staging *staging)
-+{
-+	const struct kdbus_meta_proc *mp = staging->mp;
-+	const struct kdbus_meta_fake *mf = staging->mf;
-+	const struct kdbus_meta_conn *mc = staging->mc;
-+	const u64 mask = staging->mask;
-+	size_t size = 0;
-+
-+	/* process metadata */
-+
-+	if (mf && (mask & KDBUS_ATTACH_CREDS))
-+		size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_creds));
-+	else if (mp && (mask & KDBUS_ATTACH_CREDS))
-+		size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_creds));
-+
-+	if (mf && (mask & KDBUS_ATTACH_PIDS))
-+		size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_pids));
-+	else if (mp && (mask & KDBUS_ATTACH_PIDS))
-+		size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_pids));
-+
-+	if (mp && (mask & KDBUS_ATTACH_AUXGROUPS))
-+		size += KDBUS_ITEM_SIZE(mp->cred->group_info->ngroups *
-+					sizeof(u64));
-+
-+	if (mp && (mask & KDBUS_ATTACH_TID_COMM))
-+		size += KDBUS_ITEM_SIZE(strlen(mp->tid_comm) + 1);
-+
-+	if (mp && (mask & KDBUS_ATTACH_PID_COMM))
-+		size += KDBUS_ITEM_SIZE(strlen(mp->pid_comm) + 1);
-+
-+	if (staging->exe_path && (mask & KDBUS_ATTACH_EXE))
-+		size += KDBUS_ITEM_SIZE(strlen(staging->exe_path) + 1);
-+
-+	if (mp && (mask & KDBUS_ATTACH_CMDLINE))
-+		size += KDBUS_ITEM_SIZE(strlen(mp->cmdline) + 1);
-+
-+	if (mp && (mask & KDBUS_ATTACH_CGROUP))
-+		size += KDBUS_ITEM_SIZE(strlen(mp->cgroup) + 1);
-+
-+	if (mp && (mask & KDBUS_ATTACH_CAPS))
-+		size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_meta_caps));
-+
-+	if (mf && (mask & KDBUS_ATTACH_SECLABEL))
-+		size += KDBUS_ITEM_SIZE(strlen(mf->seclabel) + 1);
-+	else if (mp && (mask & KDBUS_ATTACH_SECLABEL))
-+		size += KDBUS_ITEM_SIZE(strlen(mp->seclabel) + 1);
-+
-+	if (mp && (mask & KDBUS_ATTACH_AUDIT))
-+		size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_audit));
-+
-+	/* connection metadata */
-+
-+	if (mc && (mask & KDBUS_ATTACH_NAMES))
-+		size += KDBUS_ALIGN8(mc->owned_names_size);
-+
-+	if (mc && (mask & KDBUS_ATTACH_CONN_DESCRIPTION))
-+		size += KDBUS_ITEM_SIZE(strlen(mc->conn_description) + 1);
-+
-+	if (mc && (mask & KDBUS_ATTACH_TIMESTAMP))
-+		size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_timestamp));
-+
-+	return size;
-+}
-+
-+static struct kdbus_item *kdbus_write_head(struct kdbus_item **iter,
-+					   u64 type, u64 size)
-+{
-+	struct kdbus_item *item = *iter;
-+	size_t padding;
-+
-+	item->type = type;
-+	item->size = KDBUS_ITEM_HEADER_SIZE + size;
-+
-+	/* clear padding */
-+	padding = KDBUS_ALIGN8(item->size) - item->size;
-+	if (padding)
-+		memset(item->data + size, 0, padding);
-+
-+	*iter = KDBUS_ITEM_NEXT(item);
-+	return item;
-+}
-+
-+static struct kdbus_item *kdbus_write_full(struct kdbus_item **iter,
-+					   u64 type, u64 size, const void *data)
-+{
-+	struct kdbus_item *item;
-+
-+	item = kdbus_write_head(iter, type, size);
-+	memcpy(item->data, data, size);
-+	return item;
-+}
-+
-+static size_t kdbus_meta_write(struct kdbus_meta_staging *staging, void *mem,
-+			       size_t size)
-+{
-+	struct user_namespace *user_ns = staging->conn->cred->user_ns;
-+	struct pid_namespace *pid_ns = ns_of_pid(staging->conn->pid);
-+	struct kdbus_item *item = NULL, *items = mem;
-+	u8 *end, *owned_names_end = NULL;
-+
-+	/* process metadata */
-+
-+	if (staging->mf && (staging->mask & KDBUS_ATTACH_CREDS)) {
-+		const struct kdbus_meta_fake *mf = staging->mf;
-+
-+		item = kdbus_write_head(&items, KDBUS_ITEM_CREDS,
-+					sizeof(struct kdbus_creds));
-+		item->creds = (struct kdbus_creds){
-+			.uid	= kdbus_from_kuid_keep(user_ns, mf->uid),
-+			.euid	= kdbus_from_kuid_keep(user_ns, mf->euid),
-+			.suid	= kdbus_from_kuid_keep(user_ns, mf->suid),
-+			.fsuid	= kdbus_from_kuid_keep(user_ns, mf->fsuid),
-+			.gid	= kdbus_from_kgid_keep(user_ns, mf->gid),
-+			.egid	= kdbus_from_kgid_keep(user_ns, mf->egid),
-+			.sgid	= kdbus_from_kgid_keep(user_ns, mf->sgid),
-+			.fsgid	= kdbus_from_kgid_keep(user_ns, mf->fsgid),
-+		};
-+	} else if (staging->mp && (staging->mask & KDBUS_ATTACH_CREDS)) {
-+		const struct cred *c = staging->mp->cred;
-+
-+		item = kdbus_write_head(&items, KDBUS_ITEM_CREDS,
-+					sizeof(struct kdbus_creds));
-+		item->creds = (struct kdbus_creds){
-+			.uid	= kdbus_from_kuid_keep(user_ns, c->uid),
-+			.euid	= kdbus_from_kuid_keep(user_ns, c->euid),
-+			.suid	= kdbus_from_kuid_keep(user_ns, c->suid),
-+			.fsuid	= kdbus_from_kuid_keep(user_ns, c->fsuid),
-+			.gid	= kdbus_from_kgid_keep(user_ns, c->gid),
-+			.egid	= kdbus_from_kgid_keep(user_ns, c->egid),
-+			.sgid	= kdbus_from_kgid_keep(user_ns, c->sgid),
-+			.fsgid	= kdbus_from_kgid_keep(user_ns, c->fsgid),
-+		};
-+	}
-+
-+	if (staging->mf && (staging->mask & KDBUS_ATTACH_PIDS)) {
-+		item = kdbus_write_head(&items, KDBUS_ITEM_PIDS,
-+					sizeof(struct kdbus_pids));
-+		item->pids = (struct kdbus_pids){
-+			.pid = pid_nr_ns(staging->mf->tgid, pid_ns),
-+			.tid = pid_nr_ns(staging->mf->pid, pid_ns),
-+			.ppid = pid_nr_ns(staging->mf->ppid, pid_ns),
-+		};
-+	} else if (staging->mp && (staging->mask & KDBUS_ATTACH_PIDS)) {
-+		item = kdbus_write_head(&items, KDBUS_ITEM_PIDS,
-+					sizeof(struct kdbus_pids));
-+		item->pids = (struct kdbus_pids){
-+			.pid = pid_nr_ns(staging->mp->tgid, pid_ns),
-+			.tid = pid_nr_ns(staging->mp->pid, pid_ns),
-+			.ppid = pid_nr_ns(staging->mp->ppid, pid_ns),
-+		};
-+	}
-+
-+	if (staging->mp && (staging->mask & KDBUS_ATTACH_AUXGROUPS)) {
-+		const struct group_info *info = staging->mp->cred->group_info;
-+		size_t i;
-+
-+		item = kdbus_write_head(&items, KDBUS_ITEM_AUXGROUPS,
-+					info->ngroups * sizeof(u64));
-+		for (i = 0; i < info->ngroups; ++i)
-+			item->data64[i] = from_kgid_munged(user_ns,
-+							   GROUP_AT(info, i));
-+	}
-+
-+	if (staging->mp && (staging->mask & KDBUS_ATTACH_TID_COMM))
-+		item = kdbus_write_full(&items, KDBUS_ITEM_TID_COMM,
-+					strlen(staging->mp->tid_comm) + 1,
-+					staging->mp->tid_comm);
-+
-+	if (staging->mp && (staging->mask & KDBUS_ATTACH_PID_COMM))
-+		item = kdbus_write_full(&items, KDBUS_ITEM_PID_COMM,
-+					strlen(staging->mp->pid_comm) + 1,
-+					staging->mp->pid_comm);
-+
-+	if (staging->exe_path && (staging->mask & KDBUS_ATTACH_EXE))
-+		item = kdbus_write_full(&items, KDBUS_ITEM_EXE,
-+					strlen(staging->exe_path) + 1,
-+					staging->exe_path);
-+
-+	if (staging->mp && (staging->mask & KDBUS_ATTACH_CMDLINE))
-+		item = kdbus_write_full(&items, KDBUS_ITEM_CMDLINE,
-+					strlen(staging->mp->cmdline) + 1,
-+					staging->mp->cmdline);
-+
-+	if (staging->mp && (staging->mask & KDBUS_ATTACH_CGROUP))
-+		item = kdbus_write_full(&items, KDBUS_ITEM_CGROUP,
-+					strlen(staging->mp->cgroup) + 1,
-+					staging->mp->cgroup);
-+
-+	if (staging->mp && (staging->mask & KDBUS_ATTACH_CAPS)) {
-+		item = kdbus_write_head(&items, KDBUS_ITEM_CAPS,
-+					sizeof(struct kdbus_meta_caps));
-+		kdbus_meta_export_caps((void*)&item->caps, staging->mp,
-+				       user_ns);
-+	}
-+
-+	if (staging->mf && (staging->mask & KDBUS_ATTACH_SECLABEL))
-+		item = kdbus_write_full(&items, KDBUS_ITEM_SECLABEL,
-+					strlen(staging->mf->seclabel) + 1,
-+					staging->mf->seclabel);
-+	else if (staging->mp && (staging->mask & KDBUS_ATTACH_SECLABEL))
-+		item = kdbus_write_full(&items, KDBUS_ITEM_SECLABEL,
-+					strlen(staging->mp->seclabel) + 1,
-+					staging->mp->seclabel);
-+
-+	if (staging->mp && (staging->mask & KDBUS_ATTACH_AUDIT)) {
-+		item = kdbus_write_head(&items, KDBUS_ITEM_AUDIT,
-+					sizeof(struct kdbus_audit));
-+		item->audit = (struct kdbus_audit){
-+			.loginuid = from_kuid(user_ns,
-+					      staging->mp->audit_loginuid),
-+			.sessionid = staging->mp->audit_sessionid,
-+		};
-+	}
-+
-+	/* connection metadata */
-+
-+	if (staging->mc && (staging->mask & KDBUS_ATTACH_NAMES)) {
-+		memcpy(items, staging->mc->owned_names_items,
-+		       KDBUS_ALIGN8(staging->mc->owned_names_size));
-+		owned_names_end = (u8 *)items + staging->mc->owned_names_size;
-+		items = (void *)KDBUS_ALIGN8((unsigned long)owned_names_end);
-+	}
-+
-+	if (staging->mc && (staging->mask & KDBUS_ATTACH_CONN_DESCRIPTION))
-+		item = kdbus_write_full(&items, KDBUS_ITEM_CONN_DESCRIPTION,
-+				strlen(staging->mc->conn_description) + 1,
-+				staging->mc->conn_description);
-+
-+	if (staging->mc && (staging->mask & KDBUS_ATTACH_TIMESTAMP))
-+		item = kdbus_write_full(&items, KDBUS_ITEM_TIMESTAMP,
-+					sizeof(staging->mc->ts),
-+					&staging->mc->ts);
-+
-+	/*
-+	 * Return real size (minus trailing padding). In case of 'owned_names'
-+	 * we cannot deduce it from item->size, so treat it special.
-+	 */
-+
-+	if (items == (void *)KDBUS_ALIGN8((unsigned long)owned_names_end))
-+		end = owned_names_end;
-+	else if (item)
-+		end = (u8 *)item + item->size;
-+	else
-+		end = mem;
-+
-+	WARN_ON((u8 *)items - (u8 *)mem != size);
-+	WARN_ON((void *)KDBUS_ALIGN8((unsigned long)end) != (void *)items);
-+
-+	return end - (u8 *)mem;
-+}
-+
-+int kdbus_meta_emit(struct kdbus_meta_proc *mp,
-+		    struct kdbus_meta_fake *mf,
-+		    struct kdbus_meta_conn *mc,
-+		    struct kdbus_conn *conn,
-+		    u64 mask,
-+		    struct kdbus_item **out_items,
-+		    size_t *out_size)
-+{
-+	struct kdbus_meta_staging staging = {};
-+	struct kdbus_item *items = NULL;
-+	size_t size = 0;
-+	int ret;
-+
-+	if (WARN_ON(mf && mp))
-+		mp = NULL;
-+
-+	staging.mp = mp;
-+	staging.mf = mf;
-+	staging.mc = mc;
-+	staging.conn = conn;
-+
-+	/* get mask of valid items */
-+	if (mf)
-+		staging.mask |= mf->valid;
-+	if (mp) {
-+		mutex_lock(&mp->lock);
-+		staging.mask |= mp->valid;
-+		mutex_unlock(&mp->lock);
-+	}
-+	if (mc) {
-+		mutex_lock(&mc->lock);
-+		staging.mask |= mc->valid;
-+		mutex_unlock(&mc->lock);
-+	}
-+
-+	staging.mask &= mask;
-+
-+	if (!staging.mask) { /* bail out if nothing to do */
-+		ret = 0;
-+		goto exit;
-+	}
-+
-+	/* EXE is special as it needs a temporary page to assemble */
-+	if (mp && (staging.mask & KDBUS_ATTACH_EXE)) {
-+		struct path p;
-+
-+		/*
-+		 * XXX: We need access to __d_path() so we can write the path
-+		 * relative to conn->root_path. Once upstream, we need
-+		 * EXPORT_SYMBOL(__d_path) or an equivalent of d_path() that
-+		 * takes the root path directly. Until then, we drop this item
-+		 * if the root-paths differ.
-+		 */
-+
-+		get_fs_root(current->fs, &p);
-+		if (path_equal(&p, &conn->root_path)) {
-+			staging.exe = (void *)__get_free_page(GFP_TEMPORARY);
-+			if (!staging.exe) {
-+				path_put(&p);
-+				ret = -ENOMEM;
-+				goto exit;
-+			}
-+
-+			staging.exe_path = d_path(&mp->exe_path, staging.exe,
-+						  PAGE_SIZE);
-+			if (IS_ERR(staging.exe_path)) {
-+				path_put(&p);
-+				ret = PTR_ERR(staging.exe_path);
-+				goto exit;
-+			}
-+		}
-+		path_put(&p);
-+	}
-+
-+	size = kdbus_meta_measure(&staging);
-+	if (!size) { /* bail out if nothing to do */
-+		ret = 0;
-+		goto exit;
-+	}
-+
-+	items = kmalloc(size, GFP_KERNEL);
-+	if (!items) {
-+		ret = -ENOMEM;
-+		goto exit;
-+	}
-+
-+	size = kdbus_meta_write(&staging, items, size);
-+	if (!size) {
-+		kfree(items);
-+		items = NULL;
-+	}
-+
-+	ret = 0;
-+
-+exit:
-+	if (staging.exe)
-+		free_page((unsigned long)staging.exe);
-+	if (ret >= 0) {
-+		*out_items = items;
-+		*out_size = size;
-+	}
-+	return ret;
-+}
-+
-+enum {
-+	KDBUS_META_PROC_NONE,
-+	KDBUS_META_PROC_NORMAL,
-+};
-+
-+/**
-+ * kdbus_proc_permission() - check /proc permissions on target pid
-+ * @pid_ns:		namespace we operate in
-+ * @cred:		credentials of requestor
-+ * @target:		target process
-+ *
-+ * This checks whether a process with credentials @cred can access information
-+ * of @target in the namespace @pid_ns. This tries to follow /proc permissions,
-+ * but is slightly more restrictive.
-+ *
-+ * Return: The /proc access level (KDBUS_META_PROC_*) is returned.
-+ */
-+static unsigned int kdbus_proc_permission(const struct pid_namespace *pid_ns,
-+					  const struct cred *cred,
-+					  struct pid *target)
-+{
-+	if (pid_ns->hide_pid < 1)
-+		return KDBUS_META_PROC_NORMAL;
-+
-+	/* XXX: we need groups_search() exported for aux-groups */
-+	if (gid_eq(cred->egid, pid_ns->pid_gid))
-+		return KDBUS_META_PROC_NORMAL;
-+
-+	/*
-+	 * XXX: If ptrace_may_access(PTRACE_MODE_READ) is granted, you can
-+	 * overwrite hide_pid. However, ptrace_may_access() only supports
-+	 * checking 'current', hence, we cannot use this here. But we
-+	 * simply decide to not support this override, so no need to worry.
-+	 */
-+
-+	return KDBUS_META_PROC_NONE;
-+}
-+
-+/**
-+ * kdbus_meta_proc_mask() - calculate which metadata would be visible to
-+ *			    a connection via /proc
-+ * @prv_pid:		pid of metadata provider
-+ * @req_pid:		pid of metadata requestor
-+ * @req_cred:		credentials of metadata reqeuestor
-+ * @wanted:		metadata that is requested
-+ *
-+ * This checks which metadata items of @prv_pid can be read via /proc by the
-+ * requestor @req_pid.
-+ *
-+ * Return: Set of metadata flags the requestor can see (limited by @wanted).
-+ */
-+static u64 kdbus_meta_proc_mask(struct pid *prv_pid,
-+				struct pid *req_pid,
-+				const struct cred *req_cred,
-+				u64 wanted)
-+{
-+	struct pid_namespace *prv_ns, *req_ns;
-+	unsigned int proc;
-+
-+	prv_ns = ns_of_pid(prv_pid);
-+	req_ns = ns_of_pid(req_pid);
-+
-+	/*
-+	 * If the sender is not visible in the receiver namespace, then the
-+	 * receiver cannot access the sender via its own procfs. Hence, we do
-+	 * not attach any additional metadata.
-+	 */
-+	if (!pid_nr_ns(prv_pid, req_ns))
-+		return 0;
-+
-+	/*
-+	 * If the pid-namespace of the receiver has hide_pid set, it cannot see
-+	 * any process but its own. We shortcut this /proc permission check if
-+	 * provider and requestor are the same. If not, we perform rather
-+	 * expensive /proc permission checks.
-+	 */
-+	if (prv_pid == req_pid)
-+		proc = KDBUS_META_PROC_NORMAL;
-+	else
-+		proc = kdbus_proc_permission(req_ns, req_cred, prv_pid);
-+
-+	/* you need /proc access to read standard process attributes */
-+	if (proc < KDBUS_META_PROC_NORMAL)
-+		wanted &= ~(KDBUS_ATTACH_TID_COMM |
-+			    KDBUS_ATTACH_PID_COMM |
-+			    KDBUS_ATTACH_SECLABEL |
-+			    KDBUS_ATTACH_CMDLINE |
-+			    KDBUS_ATTACH_CGROUP |
-+			    KDBUS_ATTACH_AUDIT |
-+			    KDBUS_ATTACH_CAPS |
-+			    KDBUS_ATTACH_EXE);
-+
-+	/* clear all non-/proc flags */
-+	return wanted & (KDBUS_ATTACH_TID_COMM |
-+			 KDBUS_ATTACH_PID_COMM |
-+			 KDBUS_ATTACH_SECLABEL |
-+			 KDBUS_ATTACH_CMDLINE |
-+			 KDBUS_ATTACH_CGROUP |
-+			 KDBUS_ATTACH_AUDIT |
-+			 KDBUS_ATTACH_CAPS |
-+			 KDBUS_ATTACH_EXE);
-+}
-+
-+/**
-+ * kdbus_meta_get_mask() - calculate attach flags mask for metadata request
-+ * @prv_pid:		pid of metadata provider
-+ * @prv_mask:		mask of metadata the provide grants unchecked
-+ * @req_pid:		pid of metadata requestor
-+ * @req_cred:		credentials of metadata requestor
-+ * @req_mask:		mask of metadata that is requested
-+ *
-+ * This calculates the metadata items that the requestor @req_pid can access
-+ * from the metadata provider @prv_pid. This permission check consists of
-+ * several different parts:
-+ *  - Providers can grant metadata items unchecked. Regardless of their type,
-+ *    they're always granted to the requestor. This mask is passed as @prv_mask.
-+ *  - Basic items (credentials and connection metadata) are granted implicitly
-+ *    to everyone. They're publicly available to any bus-user that can see the
-+ *    provider.
-+ *  - Process credentials that are not granted implicitly follow the same
-+ *    permission checks as /proc. This means, we always assume a requestor
-+ *    process has access to their *own* /proc mount, if they have access to
-+ *    kdbusfs.
-+ *
-+ * Return: Mask of metadata that is granted.
-+ */
-+static u64 kdbus_meta_get_mask(struct pid *prv_pid, u64 prv_mask,
-+			       struct pid *req_pid,
-+			       const struct cred *req_cred, u64 req_mask)
-+{
-+	u64 missing, impl_mask, proc_mask = 0;
-+
-+	/*
-+	 * Connection metadata and basic unix process credentials are
-+	 * transmitted implicitly, and cannot be suppressed. Both are required
-+	 * to perform user-space policies on the receiver-side. Furthermore,
-+	 * connection metadata is public state, anyway, and unix credentials
-+	 * are needed for UDS-compatibility. We extend them slightly by
-+	 * auxiliary groups and additional uids/gids/pids.
-+	 */
-+	impl_mask = /* connection metadata */
-+		    KDBUS_ATTACH_CONN_DESCRIPTION |
-+		    KDBUS_ATTACH_TIMESTAMP |
-+		    KDBUS_ATTACH_NAMES |
-+		    /* credentials and pids */
-+		    KDBUS_ATTACH_AUXGROUPS |
-+		    KDBUS_ATTACH_CREDS |
-+		    KDBUS_ATTACH_PIDS;
-+
-+	/*
-+	 * Calculate the set of metadata that is not granted implicitly nor by
-+	 * the sender, but still requested by the receiver. If any are left,
-+	 * perform rather expensive /proc access checks for them.
-+	 */
-+	missing = req_mask & ~((prv_mask | impl_mask) & req_mask);
-+	if (missing)
-+		proc_mask = kdbus_meta_proc_mask(prv_pid, req_pid, req_cred,
-+						 missing);
-+
-+	return (prv_mask | impl_mask | proc_mask) & req_mask;
-+}
-+
-+/**
-+ */
-+u64 kdbus_meta_info_mask(const struct kdbus_conn *conn, u64 mask)
-+{
-+	return kdbus_meta_get_mask(conn->pid,
-+				   atomic64_read(&conn->attach_flags_send),
-+				   task_pid(current),
-+				   current_cred(),
-+				   mask);
-+}
-+
-+/**
-+ */
-+u64 kdbus_meta_msg_mask(const struct kdbus_conn *snd,
-+			const struct kdbus_conn *rcv)
-+{
-+	return kdbus_meta_get_mask(task_pid(current),
-+				   atomic64_read(&snd->attach_flags_send),
-+				   rcv->pid,
-+				   rcv->cred,
-+				   atomic64_read(&rcv->attach_flags_recv));
-+}
-diff --git a/ipc/kdbus/metadata.h b/ipc/kdbus/metadata.h
-new file mode 100644
-index 0000000..dba7cc7
---- /dev/null
-+++ b/ipc/kdbus/metadata.h
-@@ -0,0 +1,86 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ * Copyright (C) 2014-2015 Djalal Harouni
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#ifndef __KDBUS_METADATA_H
-+#define __KDBUS_METADATA_H
-+
-+#include <linux/kernel.h>
-+
-+struct kdbus_conn;
-+struct kdbus_pool_slice;
-+
-+struct kdbus_meta_proc;
-+struct kdbus_meta_conn;
-+
-+/**
-+ * struct kdbus_meta_fake - Fake metadata
-+ * @valid:		Bitmask of collected and valid items
-+ * @uid:		UID of process
-+ * @euid:		EUID of process
-+ * @suid:		SUID of process
-+ * @fsuid:		FSUID of process
-+ * @gid:		GID of process
-+ * @egid:		EGID of process
-+ * @sgid:		SGID of process
-+ * @fsgid:		FSGID of process
-+ * @pid:		PID of process
-+ * @tgid:		TGID of process
-+ * @ppid:		PPID of process
-+ * @seclabel:		Seclabel
-+ */
-+struct kdbus_meta_fake {
-+	u64 valid;
-+
-+	/* KDBUS_ITEM_CREDS */
-+	kuid_t uid, euid, suid, fsuid;
-+	kgid_t gid, egid, sgid, fsgid;
-+
-+	/* KDBUS_ITEM_PIDS */
-+	struct pid *pid, *tgid, *ppid;
-+
-+	/* KDBUS_ITEM_SECLABEL */
-+	char *seclabel;
-+};
-+
-+struct kdbus_meta_proc *kdbus_meta_proc_new(void);
-+struct kdbus_meta_proc *kdbus_meta_proc_ref(struct kdbus_meta_proc *mp);
-+struct kdbus_meta_proc *kdbus_meta_proc_unref(struct kdbus_meta_proc *mp);
-+int kdbus_meta_proc_collect(struct kdbus_meta_proc *mp, u64 what);
-+
-+struct kdbus_meta_fake *kdbus_meta_fake_new(void);
-+struct kdbus_meta_fake *kdbus_meta_fake_free(struct kdbus_meta_fake *mf);
-+int kdbus_meta_fake_collect(struct kdbus_meta_fake *mf,
-+			    const struct kdbus_creds *creds,
-+			    const struct kdbus_pids *pids,
-+			    const char *seclabel);
-+
-+struct kdbus_meta_conn *kdbus_meta_conn_new(void);
-+struct kdbus_meta_conn *kdbus_meta_conn_ref(struct kdbus_meta_conn *mc);
-+struct kdbus_meta_conn *kdbus_meta_conn_unref(struct kdbus_meta_conn *mc);
-+int kdbus_meta_conn_collect(struct kdbus_meta_conn *mc,
-+			    struct kdbus_conn *conn,
-+			    u64 msg_seqnum, u64 what);
-+
-+int kdbus_meta_emit(struct kdbus_meta_proc *mp,
-+		    struct kdbus_meta_fake *mf,
-+		    struct kdbus_meta_conn *mc,
-+		    struct kdbus_conn *conn,
-+		    u64 mask,
-+		    struct kdbus_item **out_items,
-+		    size_t *out_size);
-+u64 kdbus_meta_info_mask(const struct kdbus_conn *conn, u64 mask);
-+u64 kdbus_meta_msg_mask(const struct kdbus_conn *snd,
-+			const struct kdbus_conn *rcv);
-+
-+#endif
-diff --git a/ipc/kdbus/names.c b/ipc/kdbus/names.c
-new file mode 100644
-index 0000000..bf44ca3
---- /dev/null
-+++ b/ipc/kdbus/names.c
-@@ -0,0 +1,854 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ * Copyright (C) 2014-2015 Djalal Harouni <tixxdz@××××××.org>
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#include <linux/ctype.h>
-+#include <linux/fs.h>
-+#include <linux/hash.h>
-+#include <linux/idr.h>
-+#include <linux/init.h>
-+#include <linux/module.h>
-+#include <linux/mutex.h>
-+#include <linux/rwsem.h>
-+#include <linux/sched.h>
-+#include <linux/slab.h>
-+#include <linux/uaccess.h>
-+#include <linux/uio.h>
-+
-+#include "bus.h"
-+#include "connection.h"
-+#include "endpoint.h"
-+#include "handle.h"
-+#include "item.h"
-+#include "names.h"
-+#include "notify.h"
-+#include "policy.h"
-+
-+#define KDBUS_NAME_SAVED_MASK (KDBUS_NAME_ALLOW_REPLACEMENT |	\
-+			       KDBUS_NAME_QUEUE)
-+
-+static bool kdbus_name_owner_is_used(struct kdbus_name_owner *owner)
-+{
-+	return !list_empty(&owner->name_entry) ||
-+	       owner == owner->name->activator;
-+}
-+
-+static struct kdbus_name_owner *
-+kdbus_name_owner_new(struct kdbus_conn *conn, struct kdbus_name_entry *name,
-+		     u64 flags)
-+{
-+	struct kdbus_name_owner *owner;
-+
-+	kdbus_conn_assert_active(conn);
-+
-+	if (conn->name_count >= KDBUS_CONN_MAX_NAMES)
-+		return ERR_PTR(-E2BIG);
-+
-+	owner = kmalloc(sizeof(*owner), GFP_KERNEL);
-+	if (!owner)
-+		return ERR_PTR(-ENOMEM);
-+
-+	owner->flags = flags & KDBUS_NAME_SAVED_MASK;
-+	owner->conn = conn;
-+	owner->name = name;
-+	list_add_tail(&owner->conn_entry, &conn->names_list);
-+	INIT_LIST_HEAD(&owner->name_entry);
-+
-+	++conn->name_count;
-+	return owner;
-+}
-+
-+static void kdbus_name_owner_free(struct kdbus_name_owner *owner)
-+{
-+	if (!owner)
-+		return;
-+
-+	WARN_ON(kdbus_name_owner_is_used(owner));
-+	--owner->conn->name_count;
-+	list_del(&owner->conn_entry);
-+	kfree(owner);
-+}
-+
-+static struct kdbus_name_owner *
-+kdbus_name_owner_find(struct kdbus_name_entry *name, struct kdbus_conn *conn)
-+{
-+	struct kdbus_name_owner *owner;
-+
-+	/*
-+	 * Use conn->names_list over name->queue to make sure boundaries of
-+	 * this linear search are controlled by the connection itself.
-+	 * Furthermore, this will find normal owners as well as activators
-+	 * without any additional code.
-+	 */
-+	list_for_each_entry(owner, &conn->names_list, conn_entry)
-+		if (owner->name == name)
-+			return owner;
-+
-+	return NULL;
-+}
-+
-+static bool kdbus_name_entry_is_used(struct kdbus_name_entry *name)
-+{
-+	return !list_empty(&name->queue) || name->activator;
-+}
-+
-+static struct kdbus_name_owner *
-+kdbus_name_entry_first(struct kdbus_name_entry *name)
-+{
-+	return list_first_entry_or_null(&name->queue, struct kdbus_name_owner,
-+					name_entry);
-+}
-+
-+static struct kdbus_name_entry *
-+kdbus_name_entry_new(struct kdbus_name_registry *r, u32 hash,
-+		     const char *name_str)
-+{
-+	struct kdbus_name_entry *name;
-+	size_t namelen;
-+
-+	lockdep_assert_held(&r->rwlock);
-+
-+	namelen = strlen(name_str);
-+
-+	name = kmalloc(sizeof(*name) + namelen + 1, GFP_KERNEL);
-+	if (!name)
-+		return ERR_PTR(-ENOMEM);
-+
-+	name->name_id = ++r->name_seq_last;
-+	name->activator = NULL;
-+	INIT_LIST_HEAD(&name->queue);
-+	hash_add(r->entries_hash, &name->hentry, hash);
-+	memcpy(name->name, name_str, namelen + 1);
-+
-+	return name;
-+}
-+
-+static void kdbus_name_entry_free(struct kdbus_name_entry *name)
-+{
-+	if (!name)
-+		return;
-+
-+	WARN_ON(kdbus_name_entry_is_used(name));
-+	hash_del(&name->hentry);
-+	kfree(name);
-+}
-+
-+static struct kdbus_name_entry *
-+kdbus_name_entry_find(struct kdbus_name_registry *r, u32 hash,
-+		      const char *name_str)
-+{
-+	struct kdbus_name_entry *name;
-+
-+	lockdep_assert_held(&r->rwlock);
-+
-+	hash_for_each_possible(r->entries_hash, name, hentry, hash)
-+		if (!strcmp(name->name, name_str))
-+			return name;
-+
-+	return NULL;
-+}
-+
-+/**
-+ * kdbus_name_registry_new() - create a new name registry
-+ *
-+ * Return: a new kdbus_name_registry on success, ERR_PTR on failure.
-+ */
-+struct kdbus_name_registry *kdbus_name_registry_new(void)
-+{
-+	struct kdbus_name_registry *r;
-+
-+	r = kmalloc(sizeof(*r), GFP_KERNEL);
-+	if (!r)
-+		return ERR_PTR(-ENOMEM);
-+
-+	hash_init(r->entries_hash);
-+	init_rwsem(&r->rwlock);
-+	r->name_seq_last = 0;
-+
-+	return r;
-+}
-+
-+/**
-+ * kdbus_name_registry_free() - free name registry
-+ * @r:		name registry to free, or NULL
-+ *
-+ * Free a name registry and cleanup all internal objects. This is a no-op if
-+ * you pass NULL as registry.
-+ */
-+void kdbus_name_registry_free(struct kdbus_name_registry *r)
-+{
-+	if (!r)
-+		return;
-+
-+	WARN_ON(!hash_empty(r->entries_hash));
-+	kfree(r);
-+}
-+
-+/**
-+ * kdbus_name_lookup_unlocked() - lookup name in registry
-+ * @reg:		name registry
-+ * @name:		name to lookup
-+ *
-+ * This looks up @name in the given name-registry and returns the
-+ * kdbus_name_entry object. The caller must hold the registry-lock and must not
-+ * access the returned object after releasing the lock.
-+ *
-+ * Return: Pointer to name-entry, or NULL if not found.
-+ */
-+struct kdbus_name_entry *
-+kdbus_name_lookup_unlocked(struct kdbus_name_registry *reg, const char *name)
-+{
-+	return kdbus_name_entry_find(reg, kdbus_strhash(name), name);
-+}
-+
-+static int kdbus_name_become_activator(struct kdbus_name_owner *owner,
-+				       u64 *return_flags)
-+{
-+	if (kdbus_name_owner_is_used(owner))
-+		return -EALREADY;
-+	if (owner->name->activator)
-+		return -EEXIST;
-+
-+	owner->name->activator = owner;
-+	owner->flags |= KDBUS_NAME_ACTIVATOR;
-+
-+	if (kdbus_name_entry_first(owner->name)) {
-+		owner->flags |= KDBUS_NAME_IN_QUEUE;
-+	} else {
-+		owner->flags |= KDBUS_NAME_PRIMARY;
-+		kdbus_notify_name_change(owner->conn->ep->bus,
-+					 KDBUS_ITEM_NAME_ADD,
-+					 0, owner->conn->id,
-+					 0, owner->flags,
-+					 owner->name->name);
-+	}
-+
-+	if (return_flags)
-+		*return_flags = owner->flags | KDBUS_NAME_ACQUIRED;
-+
-+	return 0;
-+}
-+
-+static int kdbus_name_update(struct kdbus_name_owner *owner, u64 flags,
-+			     u64 *return_flags)
-+{
-+	struct kdbus_name_owner *primary, *activator;
-+	struct kdbus_name_entry *name;
-+	struct kdbus_bus *bus;
-+	u64 nflags = 0;
-+	int ret = 0;
-+
-+	name = owner->name;
-+	bus = owner->conn->ep->bus;
-+	primary = kdbus_name_entry_first(name);
-+	activator = name->activator;
-+
-+	/* cannot be activator and acquire a name */
-+	if (owner == activator)
-+		return -EUCLEAN;
-+
-+	/* update saved flags */
-+	owner->flags = flags & KDBUS_NAME_SAVED_MASK;
-+
-+	if (!primary) {
-+		/*
-+		 * No primary owner (but maybe an activator). Take over the
-+		 * name.
-+		 */
-+
-+		list_add(&owner->name_entry, &name->queue);
-+		owner->flags |= KDBUS_NAME_PRIMARY;
-+		nflags |= KDBUS_NAME_ACQUIRED;
-+
-+		/* move messages to new owner on activation */
-+		if (activator) {
-+			kdbus_conn_move_messages(owner->conn, activator->conn,
-+						 name->name_id);
-+			kdbus_notify_name_change(bus, KDBUS_ITEM_NAME_CHANGE,
-+					activator->conn->id, owner->conn->id,
-+					activator->flags, owner->flags,
-+					name->name);
-+			activator->flags &= ~KDBUS_NAME_PRIMARY;
-+			activator->flags |= KDBUS_NAME_IN_QUEUE;
-+		} else {
-+			kdbus_notify_name_change(bus, KDBUS_ITEM_NAME_ADD,
-+						 0, owner->conn->id,
-+						 0, owner->flags,
-+						 name->name);
-+		}
-+
-+	} else if (owner == primary) {
-+		/*
-+		 * Already the primary owner of the name, flags were already
-+		 * updated. Nothing to do.
-+		 */
-+
-+		owner->flags |= KDBUS_NAME_PRIMARY;
-+
-+	} else if ((primary->flags & KDBUS_NAME_ALLOW_REPLACEMENT) &&
-+		   (flags & KDBUS_NAME_REPLACE_EXISTING)) {
-+		/*
-+		 * We're not the primary owner but can replace it. Move us
-+		 * ahead of the primary owner and acquire the name (possibly
-+		 * skipping queued owners ahead of us).
-+		 */
-+
-+		list_del_init(&owner->name_entry);
-+		list_add(&owner->name_entry, &name->queue);
-+		owner->flags |= KDBUS_NAME_PRIMARY;
-+		nflags |= KDBUS_NAME_ACQUIRED;
-+
-+		kdbus_notify_name_change(bus, KDBUS_ITEM_NAME_CHANGE,
-+					 primary->conn->id, owner->conn->id,
-+					 primary->flags, owner->flags,
-+					 name->name);
-+
-+		/* requeue old primary, or drop if queueing not wanted */
-+		if (primary->flags & KDBUS_NAME_QUEUE) {
-+			primary->flags &= ~KDBUS_NAME_PRIMARY;
-+			primary->flags |= KDBUS_NAME_IN_QUEUE;
-+		} else {
-+			list_del_init(&primary->name_entry);
-+			kdbus_name_owner_free(primary);
-+		}
-+
-+	} else if (flags & KDBUS_NAME_QUEUE) {
-+		/*
-+		 * Name is already occupied and we cannot take it over, but
-+		 * queuing is allowed. Put us silently on the queue, if not
-+		 * already there.
-+		 */
-+
-+		owner->flags |= KDBUS_NAME_IN_QUEUE;
-+		if (!kdbus_name_owner_is_used(owner)) {
-+			list_add_tail(&owner->name_entry, &name->queue);
-+			nflags |= KDBUS_NAME_ACQUIRED;
-+		}
-+	} else if (kdbus_name_owner_is_used(owner)) {
-+		/*
-+		 * Already queued on name, but re-queueing was not requested.
-+		 * Make sure to unlink it from the name, the caller is
-+		 * responsible for releasing it.
-+		 */
-+
-+		list_del_init(&owner->name_entry);
-+	} else {
-+		/*
-+		 * Name is already claimed and queueing is not requested.
-+		 * Return error to the caller.
-+		 */
-+
-+		ret = -EEXIST;
-+	}
-+
-+	if (return_flags)
-+		*return_flags = owner->flags | nflags;
-+
-+	return ret;
-+}
-+
-+int kdbus_name_acquire(struct kdbus_name_registry *reg,
-+		       struct kdbus_conn *conn, const char *name_str,
-+		       u64 flags, u64 *return_flags)
-+{
-+	struct kdbus_name_entry *name = NULL;
-+	struct kdbus_name_owner *owner = NULL;
-+	u32 hash;
-+	int ret;
-+
-+	kdbus_conn_assert_active(conn);
-+
-+	down_write(&reg->rwlock);
-+
-+	/*
-+	 * Verify the connection has access to the name. Do this before testing
-+	 * for double-acquisitions and other errors to make sure we do not leak
-+	 * information about this name through possible custom endpoints.
-+	 */
-+	if (!kdbus_conn_policy_own_name(conn, current_cred(), name_str)) {
-+		ret = -EPERM;
-+		goto exit;
-+	}
-+
-+	/*
-+	 * Lookup the name entry. If it already exists, search for an owner
-+	 * entry as we might already own that name. If either does not exist,
-+	 * we will allocate a fresh one.
-+	 */
-+	hash = kdbus_strhash(name_str);
-+	name = kdbus_name_entry_find(reg, hash, name_str);
-+	if (name) {
-+		owner = kdbus_name_owner_find(name, conn);
-+	} else {
-+		name = kdbus_name_entry_new(reg, hash, name_str);
-+		if (IS_ERR(name)) {
-+			ret = PTR_ERR(name);
-+			name = NULL;
-+			goto exit;
-+		}
-+	}
-+
-+	/* create name owner object if not already queued */
-+	if (!owner) {
-+		owner = kdbus_name_owner_new(conn, name, flags);
-+		if (IS_ERR(owner)) {
-+			ret = PTR_ERR(owner);
-+			owner = NULL;
-+			goto exit;
-+		}
-+	}
-+
-+	if (flags & KDBUS_NAME_ACTIVATOR)
-+		ret = kdbus_name_become_activator(owner, return_flags);
-+	else
-+		ret = kdbus_name_update(owner, flags, return_flags);
-+	if (ret < 0)
-+		goto exit;
-+
-+exit:
-+	if (owner && !kdbus_name_owner_is_used(owner))
-+		kdbus_name_owner_free(owner);
-+	if (name && !kdbus_name_entry_is_used(name))
-+		kdbus_name_entry_free(name);
-+	up_write(&reg->rwlock);
-+	kdbus_notify_flush(conn->ep->bus);
-+	return ret;
-+}
-+
-+static void kdbus_name_release_unlocked(struct kdbus_name_owner *owner)
-+{
-+	struct kdbus_name_owner *primary, *next;
-+	struct kdbus_name_entry *name;
-+
-+	name = owner->name;
-+	primary = kdbus_name_entry_first(name);
-+
-+	list_del_init(&owner->name_entry);
-+	if (owner == name->activator)
-+		name->activator = NULL;
-+
-+	if (!primary || owner == primary) {
-+		next = kdbus_name_entry_first(name);
-+		if (!next)
-+			next = name->activator;
-+
-+		if (next) {
-+			/* hand to next in queue */
-+			next->flags &= ~KDBUS_NAME_IN_QUEUE;
-+			next->flags |= KDBUS_NAME_PRIMARY;
-+			if (next == name->activator)
-+				kdbus_conn_move_messages(next->conn,
-+							 owner->conn,
-+							 name->name_id);
-+
-+			kdbus_notify_name_change(owner->conn->ep->bus,
-+					KDBUS_ITEM_NAME_CHANGE,
-+					owner->conn->id, next->conn->id,
-+					owner->flags, next->flags,
-+					name->name);
-+		} else {
-+			kdbus_notify_name_change(owner->conn->ep->bus,
-+						 KDBUS_ITEM_NAME_REMOVE,
-+						 owner->conn->id, 0,
-+						 owner->flags, 0,
-+						 name->name);
-+		}
-+	}
-+
-+	kdbus_name_owner_free(owner);
-+	if (!kdbus_name_entry_is_used(name))
-+		kdbus_name_entry_free(name);
-+}
-+
-+static int kdbus_name_release(struct kdbus_name_registry *reg,
-+			      struct kdbus_conn *conn,
-+			      const char *name_str)
-+{
-+	struct kdbus_name_owner *owner;
-+	struct kdbus_name_entry *name;
-+	int ret = 0;
-+
-+	down_write(&reg->rwlock);
-+	name = kdbus_name_entry_find(reg, kdbus_strhash(name_str), name_str);
-+	if (name) {
-+		owner = kdbus_name_owner_find(name, conn);
-+		if (owner)
-+			kdbus_name_release_unlocked(owner);
-+		else
-+			ret = -EADDRINUSE;
-+	} else {
-+		ret = -ESRCH;
-+	}
-+	up_write(&reg->rwlock);
-+
-+	kdbus_notify_flush(conn->ep->bus);
-+	return ret;
-+}
-+
-+/**
-+ * kdbus_name_release_all() - remove all name entries of a given connection
-+ * @reg:		name registry
-+ * @conn:		connection
-+ */
-+void kdbus_name_release_all(struct kdbus_name_registry *reg,
-+			    struct kdbus_conn *conn)
-+{
-+	struct kdbus_name_owner *owner;
-+
-+	down_write(&reg->rwlock);
-+
-+	while ((owner = list_first_entry_or_null(&conn->names_list,
-+						 struct kdbus_name_owner,
-+						 conn_entry)))
-+		kdbus_name_release_unlocked(owner);
-+
-+	up_write(&reg->rwlock);
-+
-+	kdbus_notify_flush(conn->ep->bus);
-+}
-+
-+/**
-+ * kdbus_name_is_valid() - check if a name is valid
-+ * @p:			The name to check
-+ * @allow_wildcard:	Whether or not to allow a wildcard name
-+ *
-+ * A name is valid if all of the following criterias are met:
-+ *
-+ *  - The name has two or more elements separated by a period ('.') character.
-+ *  - All elements must contain at least one character.
-+ *  - Each element must only contain the ASCII characters "[A-Z][a-z][0-9]_-"
-+ *    and must not begin with a digit.
-+ *  - The name must not exceed KDBUS_NAME_MAX_LEN.
-+ *  - If @allow_wildcard is true, the name may end on '.*'
-+ */
-+bool kdbus_name_is_valid(const char *p, bool allow_wildcard)
-+{
-+	bool dot, found_dot = false;
-+	const char *q;
-+
-+	for (dot = true, q = p; *q; q++) {
-+		if (*q == '.') {
-+			if (dot)
-+				return false;
-+
-+			found_dot = true;
-+			dot = true;
-+		} else {
-+			bool good;
-+
-+			good = isalpha(*q) || (!dot && isdigit(*q)) ||
-+				*q == '_' || *q == '-' ||
-+				(allow_wildcard && dot &&
-+					*q == '*' && *(q + 1) == '\0');
-+
-+			if (!good)
-+				return false;
-+
-+			dot = false;
-+		}
-+	}
-+
-+	if (q - p > KDBUS_NAME_MAX_LEN)
-+		return false;
-+
-+	if (dot)
-+		return false;
-+
-+	if (!found_dot)
-+		return false;
-+
-+	return true;
-+}
-+
-+/**
-+ * kdbus_cmd_name_acquire() - handle KDBUS_CMD_NAME_ACQUIRE
-+ * @conn:		connection to operate on
-+ * @argp:		command payload
-+ *
-+ * Return: >=0 on success, negative error code on failure.
-+ */
-+int kdbus_cmd_name_acquire(struct kdbus_conn *conn, void __user *argp)
-+{
-+	const char *item_name;
-+	struct kdbus_cmd *cmd;
-+	int ret;
-+
-+	struct kdbus_arg argv[] = {
-+		{ .type = KDBUS_ITEM_NEGOTIATE },
-+		{ .type = KDBUS_ITEM_NAME, .mandatory = true },
-+	};
-+	struct kdbus_args args = {
-+		.allowed_flags = KDBUS_FLAG_NEGOTIATE |
-+				 KDBUS_NAME_REPLACE_EXISTING |
-+				 KDBUS_NAME_ALLOW_REPLACEMENT |
-+				 KDBUS_NAME_QUEUE,
-+		.argv = argv,
-+		.argc = ARRAY_SIZE(argv),
-+	};
-+
-+	if (!kdbus_conn_is_ordinary(conn))
-+		return -EOPNOTSUPP;
-+
-+	ret = kdbus_args_parse(&args, argp, &cmd);
-+	if (ret != 0)
-+		return ret;
-+
-+	item_name = argv[1].item->str;
-+	if (!kdbus_name_is_valid(item_name, false)) {
-+		ret = -EINVAL;
-+		goto exit;
-+	}
-+
-+	ret = kdbus_name_acquire(conn->ep->bus->name_registry, conn, item_name,
-+				 cmd->flags, &cmd->return_flags);
-+
-+exit:
-+	return kdbus_args_clear(&args, ret);
-+}
-+
-+/**
-+ * kdbus_cmd_name_release() - handle KDBUS_CMD_NAME_RELEASE
-+ * @conn:		connection to operate on
-+ * @argp:		command payload
-+ *
-+ * Return: >=0 on success, negative error code on failure.
-+ */
-+int kdbus_cmd_name_release(struct kdbus_conn *conn, void __user *argp)
-+{
-+	struct kdbus_cmd *cmd;
-+	int ret;
-+
-+	struct kdbus_arg argv[] = {
-+		{ .type = KDBUS_ITEM_NEGOTIATE },
-+		{ .type = KDBUS_ITEM_NAME, .mandatory = true },
-+	};
-+	struct kdbus_args args = {
-+		.allowed_flags = KDBUS_FLAG_NEGOTIATE,
-+		.argv = argv,
-+		.argc = ARRAY_SIZE(argv),
-+	};
-+
-+	if (!kdbus_conn_is_ordinary(conn))
-+		return -EOPNOTSUPP;
-+
-+	ret = kdbus_args_parse(&args, argp, &cmd);
-+	if (ret != 0)
-+		return ret;
-+
-+	ret = kdbus_name_release(conn->ep->bus->name_registry, conn,
-+				 argv[1].item->str);
-+	return kdbus_args_clear(&args, ret);
-+}
-+
-+static int kdbus_list_write(struct kdbus_conn *conn,
-+			    struct kdbus_conn *c,
-+			    struct kdbus_pool_slice *slice,
-+			    size_t *pos,
-+			    struct kdbus_name_owner *o,
-+			    bool write)
-+{
-+	struct kvec kvec[4];
-+	size_t cnt = 0;
-+	int ret;
-+
-+	/* info header */
-+	struct kdbus_info info = {
-+		.size = 0,
-+		.id = c->id,
-+		.flags = c->flags,
-+	};
-+
-+	/* fake the header of a kdbus_name item */
-+	struct {
-+		u64 size;
-+		u64 type;
-+		u64 flags;
-+	} h = {};
-+
-+	if (o && !kdbus_conn_policy_see_name_unlocked(conn, current_cred(),
-+						      o->name->name))
-+		return 0;
-+
-+	kdbus_kvec_set(&kvec[cnt++], &info, sizeof(info), &info.size);
-+
-+	/* append name */
-+	if (o) {
-+		size_t slen = strlen(o->name->name) + 1;
-+
-+		h.size = offsetof(struct kdbus_item, name.name) + slen;
-+		h.type = KDBUS_ITEM_OWNED_NAME;
-+		h.flags = o->flags;
-+
-+		kdbus_kvec_set(&kvec[cnt++], &h, sizeof(h), &info.size);
-+		kdbus_kvec_set(&kvec[cnt++], o->name->name, slen, &info.size);
-+		cnt += !!kdbus_kvec_pad(&kvec[cnt], &info.size);
-+	}
-+
-+	if (write) {
-+		ret = kdbus_pool_slice_copy_kvec(slice, *pos, kvec,
-+						 cnt, info.size);
-+		if (ret < 0)
-+			return ret;
-+	}
-+
-+	*pos += info.size;
-+	return 0;
-+}
-+
-+static int kdbus_list_all(struct kdbus_conn *conn, u64 flags,
-+			  struct kdbus_pool_slice *slice,
-+			  size_t *pos, bool write)
-+{
-+	struct kdbus_conn *c;
-+	size_t p = *pos;
-+	int ret, i;
-+
-+	hash_for_each(conn->ep->bus->conn_hash, i, c, hentry) {
-+		bool added = false;
-+
-+		/* skip monitors */
-+		if (kdbus_conn_is_monitor(c))
-+			continue;
-+
-+		/* all names the connection owns */
-+		if (flags & (KDBUS_LIST_NAMES |
-+			     KDBUS_LIST_ACTIVATORS |
-+			     KDBUS_LIST_QUEUED)) {
-+			struct kdbus_name_owner *o;
-+
-+			list_for_each_entry(o, &c->names_list, conn_entry) {
-+				if (o->flags & KDBUS_NAME_ACTIVATOR) {
-+					if (!(flags & KDBUS_LIST_ACTIVATORS))
-+						continue;
-+
-+					ret = kdbus_list_write(conn, c, slice,
-+							       &p, o, write);
-+					if (ret < 0) {
-+						mutex_unlock(&c->lock);
-+						return ret;
-+					}
-+
-+					added = true;
-+				} else if (o->flags & KDBUS_NAME_IN_QUEUE) {
-+					if (!(flags & KDBUS_LIST_QUEUED))
-+						continue;
-+
-+					ret = kdbus_list_write(conn, c, slice,
-+							       &p, o, write);
-+					if (ret < 0) {
-+						mutex_unlock(&c->lock);
-+						return ret;
-+					}
-+
-+					added = true;
-+				} else if (flags & KDBUS_LIST_NAMES) {
-+					ret = kdbus_list_write(conn, c, slice,
-+							       &p, o, write);
-+					if (ret < 0) {
-+						mutex_unlock(&c->lock);
-+						return ret;
-+					}
-+
-+					added = true;
-+				}
-+			}
-+		}
-+
-+		/* nothing added so far, just add the unique ID */
-+		if (!added && (flags & KDBUS_LIST_UNIQUE)) {
-+			ret = kdbus_list_write(conn, c, slice, &p, NULL, write);
-+			if (ret < 0)
-+				return ret;
-+		}
-+	}
-+
-+	*pos = p;
-+	return 0;
-+}
-+
-+/**
-+ * kdbus_cmd_list() - handle KDBUS_CMD_LIST
-+ * @conn:		connection to operate on
-+ * @argp:		command payload
-+ *
-+ * Return: >=0 on success, negative error code on failure.
-+ */
-+int kdbus_cmd_list(struct kdbus_conn *conn, void __user *argp)
-+{
-+	struct kdbus_name_registry *reg = conn->ep->bus->name_registry;
-+	struct kdbus_pool_slice *slice = NULL;
-+	struct kdbus_cmd_list *cmd;
-+	size_t pos, size;
-+	int ret;
-+
-+	struct kdbus_arg argv[] = {
-+		{ .type = KDBUS_ITEM_NEGOTIATE },
-+	};
-+	struct kdbus_args args = {
-+		.allowed_flags = KDBUS_FLAG_NEGOTIATE |
-+				 KDBUS_LIST_UNIQUE |
-+				 KDBUS_LIST_NAMES |
-+				 KDBUS_LIST_ACTIVATORS |
-+				 KDBUS_LIST_QUEUED,
-+		.argv = argv,
-+		.argc = ARRAY_SIZE(argv),
-+	};
-+
-+	ret = kdbus_args_parse(&args, argp, &cmd);
-+	if (ret != 0)
-+		return ret;
-+
-+	/* lock order: domain -> bus -> ep -> names -> conn */
-+	down_read(&reg->rwlock);
-+	down_read(&conn->ep->bus->conn_rwlock);
-+	down_read(&conn->ep->policy_db.entries_rwlock);
-+
-+	/* size of records */
-+	size = 0;
-+	ret = kdbus_list_all(conn, cmd->flags, NULL, &size, false);
-+	if (ret < 0)
-+		goto exit_unlock;
-+
-+	if (size == 0) {
-+		kdbus_pool_publish_empty(conn->pool, &cmd->offset,
-+					 &cmd->list_size);
-+	} else {
-+		slice = kdbus_pool_slice_alloc(conn->pool, size, false);
-+		if (IS_ERR(slice)) {
-+			ret = PTR_ERR(slice);
-+			slice = NULL;
-+			goto exit_unlock;
-+		}
-+
-+		/* copy the records */
-+		pos = 0;
-+		ret = kdbus_list_all(conn, cmd->flags, slice, &pos, true);
-+		if (ret < 0)
-+			goto exit_unlock;
-+
-+		WARN_ON(pos != size);
-+		kdbus_pool_slice_publish(slice, &cmd->offset, &cmd->list_size);
-+	}
-+
-+	if (kdbus_member_set_user(&cmd->offset, argp, typeof(*cmd), offset) ||
-+	    kdbus_member_set_user(&cmd->list_size, argp,
-+				  typeof(*cmd), list_size))
-+		ret = -EFAULT;
-+
-+exit_unlock:
-+	up_read(&conn->ep->policy_db.entries_rwlock);
-+	up_read(&conn->ep->bus->conn_rwlock);
-+	up_read(&reg->rwlock);
-+	kdbus_pool_slice_release(slice);
-+	return kdbus_args_clear(&args, ret);
-+}
-diff --git a/ipc/kdbus/names.h b/ipc/kdbus/names.h
-new file mode 100644
-index 0000000..edac59d
---- /dev/null
-+++ b/ipc/kdbus/names.h
-@@ -0,0 +1,105 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ * Copyright (C) 2014-2015 Djalal Harouni <tixxdz@××××××.org>
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#ifndef __KDBUS_NAMES_H
-+#define __KDBUS_NAMES_H
-+
-+#include <linux/hashtable.h>
-+#include <linux/rwsem.h>
-+
-+struct kdbus_name_entry;
-+struct kdbus_name_owner;
-+struct kdbus_name_registry;
-+
-+/**
-+ * struct kdbus_name_registry - names registered for a bus
-+ * @entries_hash:	Map of entries
-+ * @lock:		Registry data lock
-+ * @name_seq_last:	Last used sequence number to assign to a name entry
-+ */
-+struct kdbus_name_registry {
-+	DECLARE_HASHTABLE(entries_hash, 8);
-+	struct rw_semaphore rwlock;
-+	u64 name_seq_last;
-+};
-+
-+/**
-+ * struct kdbus_name_entry - well-know name entry
-+ * @name_id:		sequence number of name entry to be able to uniquely
-+ *			identify a name over its registration lifetime
-+ * @activator:		activator of this name, or NULL
-+ * @queue:		list of queued owners
-+ * @hentry:		entry in registry map
-+ * @name:		well-known name
-+ */
-+struct kdbus_name_entry {
-+	u64 name_id;
-+	struct kdbus_name_owner *activator;
-+	struct list_head queue;
-+	struct hlist_node hentry;
-+	char name[];
-+};
-+
-+/**
-+ * struct kdbus_name_owner - owner of a well-known name
-+ * @flags:		KDBUS_NAME_* flags of this owner
-+ * @conn:		connection owning the name
-+ * @name:		name that is owned
-+ * @conn_entry:		link into @conn
-+ * @name_entry:		link into @name
-+ */
-+struct kdbus_name_owner {
-+	u64 flags;
-+	struct kdbus_conn *conn;
-+	struct kdbus_name_entry *name;
-+	struct list_head conn_entry;
-+	struct list_head name_entry;
-+};
-+
-+bool kdbus_name_is_valid(const char *p, bool allow_wildcard);
-+
-+struct kdbus_name_registry *kdbus_name_registry_new(void);
-+void kdbus_name_registry_free(struct kdbus_name_registry *reg);
-+
-+struct kdbus_name_entry *
-+kdbus_name_lookup_unlocked(struct kdbus_name_registry *reg, const char *name);
-+
-+int kdbus_name_acquire(struct kdbus_name_registry *reg,
-+		       struct kdbus_conn *conn, const char *name,
-+		       u64 flags, u64 *return_flags);
-+void kdbus_name_release_all(struct kdbus_name_registry *reg,
-+			    struct kdbus_conn *conn);
-+
-+int kdbus_cmd_name_acquire(struct kdbus_conn *conn, void __user *argp);
-+int kdbus_cmd_name_release(struct kdbus_conn *conn, void __user *argp);
-+int kdbus_cmd_list(struct kdbus_conn *conn, void __user *argp);
-+
-+/**
-+ * kdbus_name_get_owner() - get current owner of a name
-+ * @name:	name to get current owner of
-+ *
-+ * This returns a pointer to the current owner of a name (or its activator if
-+ * there is no owner). The caller must make sure @name is valid and does not
-+ * vanish.
-+ *
-+ * Return: Pointer to current owner or NULL if there is none.
-+ */
-+static inline struct kdbus_name_owner *
-+kdbus_name_get_owner(struct kdbus_name_entry *name)
-+{
-+	return list_first_entry_or_null(&name->queue, struct kdbus_name_owner,
-+					name_entry) ? : name->activator;
-+}
-+
-+#endif
-diff --git a/ipc/kdbus/node.c b/ipc/kdbus/node.c
-new file mode 100644
-index 0000000..89f58bc
---- /dev/null
-+++ b/ipc/kdbus/node.c
-@@ -0,0 +1,897 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#include <linux/atomic.h>
-+#include <linux/fs.h>
-+#include <linux/idr.h>
-+#include <linux/kdev_t.h>
-+#include <linux/rbtree.h>
-+#include <linux/rwsem.h>
-+#include <linux/sched.h>
-+#include <linux/slab.h>
-+#include <linux/wait.h>
-+
-+#include "bus.h"
-+#include "domain.h"
-+#include "endpoint.h"
-+#include "fs.h"
-+#include "handle.h"
-+#include "node.h"
-+#include "util.h"
-+
-+/**
-+ * DOC: kdbus nodes
-+ *
-+ * Nodes unify lifetime management across exposed kdbus objects and provide a
-+ * hierarchy. Each kdbus object, that might be exposed to user-space, has a
-+ * kdbus_node object embedded and is linked into the hierarchy. Each node can
-+ * have any number (0-n) of child nodes linked. Each child retains a reference
-+ * to its parent node. For root-nodes, the parent is NULL.
-+ *
-+ * Each node object goes through a bunch of states during it's lifetime:
-+ *     * NEW
-+ *       * LINKED    (can be skipped by NEW->FREED transition)
-+ *         * ACTIVE  (can be skipped by LINKED->INACTIVE transition)
-+ *       * INACTIVE
-+ *       * DRAINED
-+ *     * FREED
-+ *
-+ * Each node is allocated by the caller and initialized via kdbus_node_init().
-+ * This never fails and sets the object into state NEW. From now on, ref-counts
-+ * on the node manage its lifetime. During init, the ref-count is set to 1. Once
-+ * it drops to 0, the node goes to state FREED and the node->free_cb() callback
-+ * is called to deallocate any memory.
-+ *
-+ * After initializing a node, you usually link it into the hierarchy. You need
-+ * to provide a parent node and a name. The node will be linked as child to the
-+ * parent and a globally unique ID is assigned to the child. The name of the
-+ * child must be unique for all children of this parent. Otherwise, linking the
-+ * child will fail with -EEXIST.
-+ * Note that the child is not marked active, yet. Admittedly, it prevents any
-+ * other node from being linked with the same name (thus, it reserves that
-+ * name), but any child-lookup (via name or unique ID) will never return this
-+ * child unless it has been marked active.
-+ *
-+ * Once successfully linked, you can use kdbus_node_activate() to activate a
-+ * child. This will mark the child active. This state can be skipped by directly
-+ * deactivating the child via kdbus_node_deactivate() (see below).
-+ * By activating a child, you enable any lookups on this child to succeed from
-+ * now on. Furthermore, any code that got its hands on a reference to the node,
-+ * can from now on "acquire" the node.
-+ *
-+ *     Active References (or: 'acquiring' and 'releasing' a node)
-+ *     Additionally to normal object references, nodes support something we call
-+ *     "active references". An active reference can be acquired via
-+ *     kdbus_node_acquire() and released via kdbus_node_release(). A caller
-+ *     _must_ own a normal object reference whenever calling those functions.
-+ *     Unlike object references, acquiring an active reference can fail (by
-+ *     returning 'false' from kdbus_node_acquire()). An active reference can
-+ *     only be acquired if the node is marked active. If it is not marked
-+ *     active, yet, or if it was already deactivated, no more active references
-+ *     can be acquired, ever!
-+ *     Active references are used to track tasks working on a node. Whenever a
-+ *     task enters kernel-space to perform an action on a node, it acquires an
-+ *     active reference, performs the action and releases the reference again.
-+ *     While holding an active reference, the node is guaranteed to stay active.
-+ *     If the node is deactivated in parallel, the node is marked as
-+ *     deactivated, then we wait for all active references to be dropped, before
-+ *     we finally proceed with any cleanups. That is, if you hold an active
-+ *     reference to a node, any resources that are bound to the "active" state
-+ *     are guaranteed to stay accessible until you release your reference.
-+ *
-+ *     Active-references are very similar to rw-locks, where acquiring a node is
-+ *     equal to try-read-lock and releasing to read-unlock. Deactivating a node
-+ *     means write-lock and never releasing it again.
-+ *     Unlike rw-locks, the 'active reference' concept is more versatile and
-+ *     avoids unusual rw-lock usage (never releasing a write-lock..).
-+ *
-+ *     It is safe to acquire multiple active-references recursively. But you
-+ *     need to check the return value of kdbus_node_acquire() on _each_ call. It
-+ *     may stop granting references at _any_ time.
-+ *
-+ *     You're free to perform any operations you want while holding an active
-+ *     reference, except sleeping for an indefinite period. Sleeping for a fixed
-+ *     amount of time is fine, but you usually should not wait on wait-queues
-+ *     without a timeout.
-+ *     For example, if you wait for I/O to happen, you should gather all data
-+ *     and schedule the I/O operation, then release your active reference and
-+ *     wait for it to complete. Then try to acquire a new reference. If it
-+ *     fails, perform any cleanup (the node is now dead). Otherwise, you can
-+ *     finish your operation.
-+ *
-+ * All nodes can be deactivated via kdbus_node_deactivate() at any time. You can
-+ * call this multiple times, even in parallel or on nodes that were never
-+ * linked, and it will just work. The only restriction is, you must not hold an
-+ * active reference when calling kdbus_node_deactivate().
-+ * By deactivating a node, it is immediately marked inactive. Then, we wait for
-+ * all active references to be released (called 'draining' the node). This
-+ * shouldn't take very long as we don't perform long-lasting operations while
-+ * holding an active reference. Note that once the node is marked inactive, no
-+ * new active references can be acquired.
-+ * Once all active references are dropped, the node is considered 'drained'. Now
-+ * kdbus_node_deactivate() is called on each child of the node before we
-+ * continue deactivating our node. That is, once all children are entirely
-+ * deactivated, we call ->release_cb() of our node. ->release_cb() can release
-+ * any resources on that node which are bound to the "active" state of a node.
-+ * When done, we unlink the node from its parent rb-tree, mark it as
-+ * 'released' and return.
-+ * If kdbus_node_deactivate() is called multiple times (even in parallel), all
-+ * but one caller will just wait until the node is fully deactivated. That is,
-+ * one random caller of kdbus_node_deactivate() is selected to call
-+ * ->release_cb() and cleanup the node. Only once all this is done, all other
-+ * callers will return from kdbus_node_deactivate(). That is, it doesn't matter
-+ * whether you're the selected caller or not, it will only return after
-+ * everything is fully done.
-+ *
-+ * When a node is activated, we acquire a normal object reference to the node.
-+ * This reference is dropped after deactivation is fully done (and only iff the
-+ * node really was activated). This allows callers to link+activate a child node
-+ * and then drop all refs. The node will be deactivated together with the
-+ * parent, and then be freed when this reference is dropped.
-+ *
-+ * Currently, nodes provide a bunch of resources that external code can use
-+ * directly. This includes:
-+ *
-+ *     * node->waitq: Each node has its own wait-queue that is used to manage
-+ *                    the 'active' state. When a node is deactivated, we wait on
-+ *                    this queue until all active refs are dropped. Analogously,
-+ *                    when you release an active reference on a deactivated
-+ *                    node, and the active ref-count drops to 0, we wake up a
-+ *                    single thread on this queue. Furthermore, once the
-+ *                    ->release_cb() callback finished, we wake up all waiters.
-+ *                    The node-owner is free to re-use this wait-queue for other
-+ *                    purposes. As node-management uses this queue only during
-+ *                    deactivation, it is usually totally fine to re-use the
-+ *                    queue for other, preferably low-overhead, use-cases.
-+ *
-+ *     * node->type: This field defines the type of the owner of this node. It
-+ *                   must be set during node initialization and must remain
-+ *                   constant. The node management never looks at this value,
-+ *                   but external users might use to gain access to the owner
-+ *                   object of a node.
-+ *                   It is totally up to the owner of the node to define what
-+ *                   their type means. Usually it means you can access the
-+ *                   parent structure via container_of(), as long as you hold an
-+ *                   active reference to the node.
-+ *
-+ *     * node->free_cb:    callback after all references are dropped
-+ *       node->release_cb: callback during node deactivation
-+ *                         These fields must be set by the node owner during
-+ *                         node initialization. They must remain constant. If
-+ *                         NULL, they're skipped.
-+ *
-+ *     * node->mode: filesystem access modes
-+ *       node->uid:  filesystem owner uid
-+ *       node->gid:  filesystem owner gid
-+ *                   These fields must be set by the node owner during node
-+ *                   initialization. They must remain constant and may be
-+ *                   accessed by other callers to properly initialize
-+ *                   filesystem nodes.
-+ *
-+ *     * node->id: This is an unsigned 32bit integer allocated by an IDA. It is
-+ *                 always kept as small as possible during allocation and is
-+ *                 globally unique across all nodes allocated by this module. 0
-+ *                 is reserved as "not assigned" and is the default.
-+ *                 The ID is assigned during kdbus_node_link() and is kept until
-+ *                 the object is freed. Thus, the ID surpasses the active
-+ *                 lifetime of a node. As long as you hold an object reference
-+ *                 to a node (and the node was linked once), the ID is valid and
-+ *                 unique.
-+ *
-+ *     * node->name: name of this node
-+ *       node->hash: 31bit hash-value of @name (range [2..INT_MAX-1])
-+ *                   These values follow the same lifetime rules as node->id.
-+ *                   They're initialized when the node is linked and then remain
-+ *                   constant until the last object reference is dropped.
-+ *                   Unlike the id, the name is only unique across all siblings
-+ *                   and only until the node is deactivated. Currently, the name
-+ *                   is even unique if linked but not activated, yet. This might
-+ *                   change in the future, though. Code should not rely on this.
-+ *
-+ *     * node->lock:     lock to protect node->children, node->rb, node->parent
-+ *     * node->parent: Reference to parent node. This is set during LINK time
-+ *                     and is dropped during destruction. You must not access
-+ *                     it unless you hold an active reference to the node or if
-+ *                     you know the node is dead.
-+ *     * node->children: rb-tree of all linked children of this node. You must
-+ *                       not access this directly, but use one of the iterator
-+ *                       or lookup helpers.
-+ */
-+
-+/*
-+ * Bias values track states of "active references". They're all negative. If a
-+ * node is active, its active-ref-counter is >=0 and tracks all active
-+ * references. Once a node is deactivaed, we subtract NODE_BIAS. This means, the
-+ * counter is now negative but still counts the active references. Once it drops
-+ * to exactly NODE_BIAS, we know all active references were dropped. Exactly one
-+ * thread will change it to NODE_RELEASE now, perform cleanup and then put it
-+ * into NODE_DRAINED. Once drained, all other threads that tried deactivating
-+ * the node will now be woken up (thus, they wait until the node is fully done).
-+ * The initial state during node-setup is NODE_NEW. If a node is directly
-+ * deactivated without having ever been active, it is put into
-+ * NODE_RELEASE_DIRECT instead of NODE_BIAS. This tracks this one-bit state
-+ * across node-deactivation. The task putting it into NODE_RELEASE now knows
-+ * whether the node was active before or not.
-+ *
-+ * Some archs implement atomic_sub(v) with atomic_add(-v), so reserve INT_MIN
-+ * to avoid overflows if multiplied by -1.
-+ */
-+#define KDBUS_NODE_BIAS			(INT_MIN + 5)
-+#define KDBUS_NODE_RELEASE_DIRECT	(KDBUS_NODE_BIAS - 1)
-+#define KDBUS_NODE_RELEASE		(KDBUS_NODE_BIAS - 2)
-+#define KDBUS_NODE_DRAINED		(KDBUS_NODE_BIAS - 3)
-+#define KDBUS_NODE_NEW			(KDBUS_NODE_BIAS - 4)
-+
-+/* global unique ID mapping for kdbus nodes */
-+DEFINE_IDA(kdbus_node_ida);
-+
-+/**
-+ * kdbus_node_name_hash() - hash a name
-+ * @name:	The string to hash
-+ *
-+ * This computes the hash of @name. It is guaranteed to be in the range
-+ * [2..INT_MAX-1]. The values 1, 2 and INT_MAX are unused as they are reserved
-+ * for the filesystem code.
-+ *
-+ * Return: hash value of the passed string
-+ */
-+static unsigned int kdbus_node_name_hash(const char *name)
-+{
-+	unsigned int hash;
-+
-+	/* reserve hash numbers 0, 1 and >=INT_MAX for magic directories */
-+	hash = kdbus_strhash(name) & INT_MAX;
-+	if (hash < 2)
-+		hash += 2;
-+	if (hash >= INT_MAX)
-+		hash = INT_MAX - 1;
-+
-+	return hash;
-+}
-+
-+/**
-+ * kdbus_node_name_compare() - compare a name with a node's name
-+ * @hash:	hash of the string to compare the node with
-+ * @name:	name to compare the node with
-+ * @node:	node to compare the name with
-+ *
-+ * Return: 0 if @name and @hash exactly match the information in @node, or
-+ * an integer less than or greater than zero if @name is found, respectively,
-+ * to be less than or be greater than the string stored in @node.
-+ */
-+static int kdbus_node_name_compare(unsigned int hash, const char *name,
-+				   const struct kdbus_node *node)
-+{
-+	if (hash != node->hash)
-+		return hash - node->hash;
-+
-+	return strcmp(name, node->name);
-+}
-+
-+/**
-+ * kdbus_node_init() - initialize a kdbus_node
-+ * @node:	Pointer to the node to initialize
-+ * @type:	The type the node will have (KDBUS_NODE_*)
-+ *
-+ * The caller is responsible of allocating @node and initializating it to zero.
-+ * Once this call returns, you must use the node_ref() and node_unref()
-+ * functions to manage this node.
-+ */
-+void kdbus_node_init(struct kdbus_node *node, unsigned int type)
-+{
-+	atomic_set(&node->refcnt, 1);
-+	mutex_init(&node->lock);
-+	node->id = 0;
-+	node->type = type;
-+	RB_CLEAR_NODE(&node->rb);
-+	node->children = RB_ROOT;
-+	init_waitqueue_head(&node->waitq);
-+	atomic_set(&node->active, KDBUS_NODE_NEW);
-+}
-+
-+/**
-+ * kdbus_node_link() - link a node into the nodes system
-+ * @node:	Pointer to the node to initialize
-+ * @parent:	Pointer to a parent node, may be %NULL
-+ * @name:	The name of the node (or NULL if root node)
-+ *
-+ * This links a node into the hierarchy. This must not be called multiple times.
-+ * If @parent is NULL, the node becomes a new root node.
-+ *
-+ * This call will fail if @name is not unique across all its siblings or if no
-+ * ID could be allocated. You must not activate a node if linking failed! It is
-+ * safe to deactivate it, though.
-+ *
-+ * Once you linked a node, you must call kdbus_node_deactivate() before you drop
-+ * the last reference (even if you never activate the node).
-+ *
-+ * Return: 0 on success. negative error otherwise.
-+ */
-+int kdbus_node_link(struct kdbus_node *node, struct kdbus_node *parent,
-+		    const char *name)
-+{
-+	int ret;
-+
-+	if (WARN_ON(node->type != KDBUS_NODE_DOMAIN && !parent))
-+		return -EINVAL;
-+
-+	if (WARN_ON(parent && !name))
-+		return -EINVAL;
-+
-+	if (name) {
-+		node->name = kstrdup(name, GFP_KERNEL);
-+		if (!node->name)
-+			return -ENOMEM;
-+
-+		node->hash = kdbus_node_name_hash(name);
-+	}
-+
-+	ret = ida_simple_get(&kdbus_node_ida, 1, 0, GFP_KERNEL);
-+	if (ret < 0)
-+		return ret;
-+
-+	node->id = ret;
-+	ret = 0;
-+
-+	if (parent) {
-+		struct rb_node **n, *prev;
-+
-+		if (!kdbus_node_acquire(parent))
-+			return -ESHUTDOWN;
-+
-+		mutex_lock(&parent->lock);
-+
-+		n = &parent->children.rb_node;
-+		prev = NULL;
-+
-+		while (*n) {
-+			struct kdbus_node *pos;
-+			int result;
-+
-+			pos = kdbus_node_from_rb(*n);
-+			prev = *n;
-+			result = kdbus_node_name_compare(node->hash,
-+							 node->name,
-+							 pos);
-+			if (result == 0) {
-+				ret = -EEXIST;
-+				goto exit_unlock;
-+			}
-+
-+			if (result < 0)
-+				n = &pos->rb.rb_left;
-+			else
-+				n = &pos->rb.rb_right;
-+		}
-+
-+		/* add new node and rebalance the tree */
-+		rb_link_node(&node->rb, prev, n);
-+		rb_insert_color(&node->rb, &parent->children);
-+		node->parent = kdbus_node_ref(parent);
-+
-+exit_unlock:
-+		mutex_unlock(&parent->lock);
-+		kdbus_node_release(parent);
-+	}
-+
-+	return ret;
-+}
-+
-+/**
-+ * kdbus_node_ref() - Acquire object reference
-+ * @node:	node to acquire reference to (or NULL)
-+ *
-+ * This acquires a new reference to @node. You must already own a reference when
-+ * calling this!
-+ * If @node is NULL, this is a no-op.
-+ *
-+ * Return: @node is returned
-+ */
-+struct kdbus_node *kdbus_node_ref(struct kdbus_node *node)
-+{
-+	if (node)
-+		atomic_inc(&node->refcnt);
-+	return node;
-+}
-+
-+/**
-+ * kdbus_node_unref() - Drop object reference
-+ * @node:	node to drop reference to (or NULL)
-+ *
-+ * This drops an object reference to @node. You must not access the node if you
-+ * no longer own a reference.
-+ * If the ref-count drops to 0, the object will be destroyed (->free_cb will be
-+ * called).
-+ *
-+ * If you linked or activated the node, you must deactivate the node before you
-+ * drop your last reference! If you didn't link or activate the node, you can
-+ * drop any reference you want.
-+ *
-+ * Note that this calls into ->free_cb() and thus _might_ sleep. The ->free_cb()
-+ * callbacks must not acquire any outer locks, though. So you can safely drop
-+ * references while holding locks.
-+ *
-+ * If @node is NULL, this is a no-op.
-+ *
-+ * Return: This always returns NULL
-+ */
-+struct kdbus_node *kdbus_node_unref(struct kdbus_node *node)
-+{
-+	if (node && atomic_dec_and_test(&node->refcnt)) {
-+		struct kdbus_node safe = *node;
-+
-+		WARN_ON(atomic_read(&node->active) != KDBUS_NODE_DRAINED);
-+		WARN_ON(!RB_EMPTY_NODE(&node->rb));
-+
-+		if (node->free_cb)
-+			node->free_cb(node);
-+		if (safe.id > 0)
-+			ida_simple_remove(&kdbus_node_ida, safe.id);
-+
-+		kfree(safe.name);
-+
-+		/*
-+		 * kdbusfs relies on the parent to be available even after the
-+		 * node was deactivated and unlinked. Therefore, we pin it
-+		 * until a node is destroyed.
-+		 */
-+		kdbus_node_unref(safe.parent);
-+	}
-+
-+	return NULL;
-+}
-+
-+/**
-+ * kdbus_node_is_active() - test whether a node is active
-+ * @node:	node to test
-+ *
-+ * This checks whether @node is active. That means, @node was linked and
-+ * activated by the node owner and hasn't been deactivated, yet. If, and only
-+ * if, a node is active, kdbus_node_acquire() will be able to acquire active
-+ * references.
-+ *
-+ * Note that this function does not give any lifetime guarantees. After this
-+ * call returns, the node might be deactivated immediately. Normally, what you
-+ * want is to acquire a real active reference via kdbus_node_acquire().
-+ *
-+ * Return: true if @node is active, false otherwise
-+ */
-+bool kdbus_node_is_active(struct kdbus_node *node)
-+{
-+	return atomic_read(&node->active) >= 0;
-+}
-+
-+/**
-+ * kdbus_node_is_deactivated() - test whether a node was already deactivated
-+ * @node:	node to test
-+ *
-+ * This checks whether kdbus_node_deactivate() was called on @node. Note that
-+ * this might be true even if you never deactivated the node directly, but only
-+ * one of its ancestors.
-+ *
-+ * Note that even if this returns 'false', the node might get deactivated
-+ * immediately after the call returns.
-+ *
-+ * Return: true if @node was already deactivated, false if not
-+ */
-+bool kdbus_node_is_deactivated(struct kdbus_node *node)
-+{
-+	int v;
-+
-+	v = atomic_read(&node->active);
-+	return v != KDBUS_NODE_NEW && v < 0;
-+}
-+
-+/**
-+ * kdbus_node_activate() - activate a node
-+ * @node:	node to activate
-+ *
-+ * This marks @node as active if, and only if, the node wasn't activated nor
-+ * deactivated, yet, and the parent is still active. Any but the first call to
-+ * kdbus_node_activate() is a no-op.
-+ * If you called kdbus_node_deactivate() before, then even the first call to
-+ * kdbus_node_activate() will be a no-op.
-+ *
-+ * This call doesn't give any lifetime guarantees. The node might get
-+ * deactivated immediately after this call returns. Or the parent might already
-+ * be deactivated, which will make this call a no-op.
-+ *
-+ * If this call successfully activated a node, it will take an object reference
-+ * to it. This reference is dropped after the node is deactivated. Therefore,
-+ * the object owner can safely drop their reference to @node iff they know that
-+ * its parent node will get deactivated at some point. Once the parent node is
-+ * deactivated, it will deactivate all its child and thus drop this reference
-+ * again.
-+ *
-+ * Return: True if this call successfully activated the node, otherwise false.
-+ *         Note that this might return false, even if the node is still active
-+ *         (eg., if you called this a second time).
-+ */
-+bool kdbus_node_activate(struct kdbus_node *node)
-+{
-+	bool res = false;
-+
-+	mutex_lock(&node->lock);
-+	if (atomic_read(&node->active) == KDBUS_NODE_NEW) {
-+		atomic_sub(KDBUS_NODE_NEW, &node->active);
-+		/* activated nodes have ref +1 */
-+		kdbus_node_ref(node);
-+		res = true;
-+	}
-+	mutex_unlock(&node->lock);
-+
-+	return res;
-+}
-+
-+/**
-+ * kdbus_node_deactivate() - deactivate a node
-+ * @node:	The node to deactivate.
-+ *
-+ * This function recursively deactivates this node and all its children. It
-+ * returns only once all children and the node itself were recursively disabled
-+ * (even if you call this function multiple times in parallel).
-+ *
-+ * It is safe to call this function on _any_ node that was initialized _any_
-+ * number of times.
-+ *
-+ * This call may sleep, as it waits for all active references to be dropped.
-+ */
-+void kdbus_node_deactivate(struct kdbus_node *node)
-+{
-+	struct kdbus_node *pos, *child;
-+	struct rb_node *rb;
-+	int v_pre, v_post;
-+
-+	pos = node;
-+
-+	/*
-+	 * To avoid recursion, we perform back-tracking while deactivating
-+	 * nodes. For each node we enter, we first mark the active-counter as
-+	 * deactivated by adding BIAS. If the node as children, we set the first
-+	 * child as current position and start over. If the node has no
-+	 * children, we drain the node by waiting for all active refs to be
-+	 * dropped and then releasing the node.
-+	 *
-+	 * After the node is released, we set its parent as current position
-+	 * and start over. If the current position was the initial node, we're
-+	 * done.
-+	 *
-+	 * Note that this function can be called in parallel by multiple
-+	 * callers. We make sure that each node is only released once, and any
-+	 * racing caller will wait until the other thread fully released that
-+	 * node.
-+	 */
-+
-+	for (;;) {
-+		/*
-+		 * Add BIAS to node->active to mark it as inactive. If it was
-+		 * never active before, immediately mark it as RELEASE_INACTIVE
-+		 * so we remember this state.
-+		 * We cannot remember v_pre as we might iterate into the
-+		 * children, overwriting v_pre, before we can release our node.
-+		 */
-+		mutex_lock(&pos->lock);
-+		v_pre = atomic_read(&pos->active);
-+		if (v_pre >= 0)
-+			atomic_add_return(KDBUS_NODE_BIAS, &pos->active);
-+		else if (v_pre == KDBUS_NODE_NEW)
-+			atomic_set(&pos->active, KDBUS_NODE_RELEASE_DIRECT);
-+		mutex_unlock(&pos->lock);
-+
-+		/* wait until all active references were dropped */
-+		wait_event(pos->waitq,
-+			   atomic_read(&pos->active) <= KDBUS_NODE_BIAS);
-+
-+		mutex_lock(&pos->lock);
-+		/* recurse into first child if any */
-+		rb = rb_first(&pos->children);
-+		if (rb) {
-+			child = kdbus_node_ref(kdbus_node_from_rb(rb));
-+			mutex_unlock(&pos->lock);
-+			pos = child;
-+			continue;
-+		}
-+
-+		/* mark object as RELEASE */
-+		v_post = atomic_read(&pos->active);
-+		if (v_post == KDBUS_NODE_BIAS ||
-+		    v_post == KDBUS_NODE_RELEASE_DIRECT)
-+			atomic_set(&pos->active, KDBUS_NODE_RELEASE);
-+		mutex_unlock(&pos->lock);
-+
-+		/*
-+		 * If this is the thread that marked the object as RELEASE, we
-+		 * perform the actual release. Otherwise, we wait until the
-+		 * release is done and the node is marked as DRAINED.
-+		 */
-+		if (v_post == KDBUS_NODE_BIAS ||
-+		    v_post == KDBUS_NODE_RELEASE_DIRECT) {
-+			if (pos->release_cb)
-+				pos->release_cb(pos, v_post == KDBUS_NODE_BIAS);
-+
-+			if (pos->parent) {
-+				mutex_lock(&pos->parent->lock);
-+				if (!RB_EMPTY_NODE(&pos->rb)) {
-+					rb_erase(&pos->rb,
-+						 &pos->parent->children);
-+					RB_CLEAR_NODE(&pos->rb);
-+				}
-+				mutex_unlock(&pos->parent->lock);
-+			}
-+
-+			/* mark as DRAINED */
-+			atomic_set(&pos->active, KDBUS_NODE_DRAINED);
-+			wake_up_all(&pos->waitq);
-+
-+			/* drop VFS cache */
-+			kdbus_fs_flush(pos);
-+
-+			/*
-+			 * If the node was activated and someone subtracted BIAS
-+			 * from it to deactivate it, we, and only us, are
-+			 * responsible to release the extra ref-count that was
-+			 * taken once in kdbus_node_activate().
-+			 * If the node was never activated, no-one ever
-+			 * subtracted BIAS, but instead skipped that state and
-+			 * immediately went to NODE_RELEASE_DIRECT. In that case
-+			 * we must not drop the reference.
-+			 */
-+			if (v_post == KDBUS_NODE_BIAS)
-+				kdbus_node_unref(pos);
-+		} else {
-+			/* wait until object is DRAINED */
-+			wait_event(pos->waitq,
-+			    atomic_read(&pos->active) == KDBUS_NODE_DRAINED);
-+		}
-+
-+		/*
-+		 * We're done with the current node. Continue on its parent
-+		 * again, which will try deactivating its next child, or itself
-+		 * if no child is left.
-+		 * If we've reached our initial node again, we are done and
-+		 * can safely return.
-+		 */
-+		if (pos == node)
-+			break;
-+
-+		child = pos;
-+		pos = pos->parent;
-+		kdbus_node_unref(child);
-+	}
-+}
-+
-+/**
-+ * kdbus_node_acquire() - Acquire an active ref on a node
-+ * @node:	The node
-+ *
-+ * This acquires an active-reference to @node. This will only succeed if the
-+ * node is active. You must release this active reference via
-+ * kdbus_node_release() again.
-+ *
-+ * See the introduction to "active references" for more details.
-+ *
-+ * Return: %true if @node was non-NULL and active
-+ */
-+bool kdbus_node_acquire(struct kdbus_node *node)
-+{
-+	return node && atomic_inc_unless_negative(&node->active);
-+}
-+
-+/**
-+ * kdbus_node_release() - Release an active ref on a node
-+ * @node:	The node
-+ *
-+ * This releases an active reference that was previously acquired via
-+ * kdbus_node_acquire(). See kdbus_node_acquire() for details.
-+ */
-+void kdbus_node_release(struct kdbus_node *node)
-+{
-+	if (node && atomic_dec_return(&node->active) == KDBUS_NODE_BIAS)
-+		wake_up(&node->waitq);
-+}
-+
-+/**
-+ * kdbus_node_find_child() - Find child by name
-+ * @node:	parent node to search through
-+ * @name:	name of child node
-+ *
-+ * This searches through all children of @node for a child-node with name @name.
-+ * If not found, or if the child is deactivated, NULL is returned. Otherwise,
-+ * the child is acquired and a new reference is returned.
-+ *
-+ * If you're done with the child, you need to release it and drop your
-+ * reference.
-+ *
-+ * This function does not acquire the parent node. However, if the parent was
-+ * already deactivated, then kdbus_node_deactivate() will, at some point, also
-+ * deactivate the child. Therefore, we can rely on the explicit ordering during
-+ * deactivation.
-+ *
-+ * Return: Reference to acquired child node, or NULL if not found / not active.
-+ */
-+struct kdbus_node *kdbus_node_find_child(struct kdbus_node *node,
-+					 const char *name)
-+{
-+	struct kdbus_node *child;
-+	struct rb_node *rb;
-+	unsigned int hash;
-+	int ret;
-+
-+	hash = kdbus_node_name_hash(name);
-+
-+	mutex_lock(&node->lock);
-+	rb = node->children.rb_node;
-+	while (rb) {
-+		child = kdbus_node_from_rb(rb);
-+		ret = kdbus_node_name_compare(hash, name, child);
-+		if (ret < 0)
-+			rb = rb->rb_left;
-+		else if (ret > 0)
-+			rb = rb->rb_right;
-+		else
-+			break;
-+	}
-+	if (rb && kdbus_node_acquire(child))
-+		kdbus_node_ref(child);
-+	else
-+		child = NULL;
-+	mutex_unlock(&node->lock);
-+
-+	return child;
-+}
-+
-+static struct kdbus_node *node_find_closest_unlocked(struct kdbus_node *node,
-+						     unsigned int hash,
-+						     const char *name)
-+{
-+	struct kdbus_node *n, *pos = NULL;
-+	struct rb_node *rb;
-+	int res;
-+
-+	/*
-+	 * Find the closest child with ``node->hash >= hash'', or, if @name is
-+	 * valid, ``node->name >= name'' (where '>=' is the lex. order).
-+	 */
-+
-+	rb = node->children.rb_node;
-+	while (rb) {
-+		n = kdbus_node_from_rb(rb);
-+
-+		if (name)
-+			res = kdbus_node_name_compare(hash, name, n);
-+		else
-+			res = hash - n->hash;
-+
-+		if (res <= 0) {
-+			rb = rb->rb_left;
-+			pos = n;
-+		} else { /* ``hash > n->hash'', ``name > n->name'' */
-+			rb = rb->rb_right;
-+		}
-+	}
-+
-+	return pos;
-+}
-+
-+/**
-+ * kdbus_node_find_closest() - Find closest child-match
-+ * @node:	parent node to search through
-+ * @hash:	hash value to find closest match for
-+ *
-+ * Find the closest child of @node with a hash greater than or equal to @hash.
-+ * The closest match is the left-most child of @node with this property. Which
-+ * means, it is the first child with that hash returned by
-+ * kdbus_node_next_child(), if you'd iterate the whole parent node.
-+ *
-+ * Return: Reference to acquired child, or NULL if none found.
-+ */
-+struct kdbus_node *kdbus_node_find_closest(struct kdbus_node *node,
-+					   unsigned int hash)
-+{
-+	struct kdbus_node *child;
-+	struct rb_node *rb;
-+
-+	mutex_lock(&node->lock);
-+
-+	child = node_find_closest_unlocked(node, hash, NULL);
-+	while (child && !kdbus_node_acquire(child)) {
-+		rb = rb_next(&child->rb);
-+		if (rb)
-+			child = kdbus_node_from_rb(rb);
-+		else
-+			child = NULL;
-+	}
-+	kdbus_node_ref(child);
-+
-+	mutex_unlock(&node->lock);
-+
-+	return child;
-+}
-+
-+/**
-+ * kdbus_node_next_child() - Acquire next child
-+ * @node:	parent node
-+ * @prev:	previous child-node position or NULL
-+ *
-+ * This function returns a reference to the next active child of @node, after
-+ * the passed position @prev. If @prev is NULL, a reference to the first active
-+ * child is returned. If no more active children are found, NULL is returned.
-+ *
-+ * This function acquires the next child it returns. If you're done with the
-+ * returned pointer, you need to release _and_ unref it.
-+ *
-+ * The passed in pointer @prev is not modified by this function, and it does
-+ * *not* have to be active. If @prev was acquired via different means, or if it
-+ * was unlinked from its parent before you pass it in, then this iterator will
-+ * still return the next active child (it will have to search through the
-+ * rb-tree based on the node-name, though).
-+ * However, @prev must not be linked to a different parent than @node!
-+ *
-+ * Return: Reference to next acquired child, or NULL if at the end.
-+ */
-+struct kdbus_node *kdbus_node_next_child(struct kdbus_node *node,
-+					 struct kdbus_node *prev)
-+{
-+	struct kdbus_node *pos = NULL;
-+	struct rb_node *rb;
-+
-+	mutex_lock(&node->lock);
-+
-+	if (!prev) {
-+		/*
-+		 * New iteration; find first node in rb-tree and try to acquire
-+		 * it. If we got it, directly return it as first element.
-+		 * Otherwise, the loop below will find the next active node.
-+		 */
-+		rb = rb_first(&node->children);
-+		if (!rb)
-+			goto exit;
-+		pos = kdbus_node_from_rb(rb);
-+		if (kdbus_node_acquire(pos))
-+			goto exit;
-+	} else if (RB_EMPTY_NODE(&prev->rb)) {
-+		/*
-+		 * The current iterator is no longer linked to the rb-tree. Use
-+		 * its hash value and name to find the next _higher_ node and
-+		 * acquire it. If we got it, return it as next element.
-+		 * Otherwise, the loop below will find the next active node.
-+		 */
-+		pos = node_find_closest_unlocked(node, prev->hash, prev->name);
-+		if (!pos)
-+			goto exit;
-+		if (kdbus_node_acquire(pos))
-+			goto exit;
-+	} else {
-+		/*
-+		 * The current iterator is still linked to the parent. Set it
-+		 * as current position and use the loop below to find the next
-+		 * active element.
-+		 */
-+		pos = prev;
-+	}
-+
-+	/* @pos was already returned or is inactive; find next active node */
-+	do {
-+		rb = rb_next(&pos->rb);
-+		if (rb)
-+			pos = kdbus_node_from_rb(rb);
-+		else
-+			pos = NULL;
-+	} while (pos && !kdbus_node_acquire(pos));
-+
-+exit:
-+	/* @pos is NULL or acquired. Take ref if non-NULL and return it */
-+	kdbus_node_ref(pos);
-+	mutex_unlock(&node->lock);
-+	return pos;
-+}
-diff --git a/ipc/kdbus/node.h b/ipc/kdbus/node.h
-new file mode 100644
-index 0000000..970e02b
---- /dev/null
-+++ b/ipc/kdbus/node.h
-@@ -0,0 +1,86 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#ifndef __KDBUS_NODE_H
-+#define __KDBUS_NODE_H
-+
-+#include <linux/atomic.h>
-+#include <linux/kernel.h>
-+#include <linux/mutex.h>
-+#include <linux/wait.h>
-+
-+struct kdbus_node;
-+
-+enum kdbus_node_type {
-+	KDBUS_NODE_DOMAIN,
-+	KDBUS_NODE_CONTROL,
-+	KDBUS_NODE_BUS,
-+	KDBUS_NODE_ENDPOINT,
-+};
-+
-+typedef void (*kdbus_node_free_t) (struct kdbus_node *node);
-+typedef void (*kdbus_node_release_t) (struct kdbus_node *node, bool was_active);
-+
-+struct kdbus_node {
-+	atomic_t refcnt;
-+	atomic_t active;
-+	wait_queue_head_t waitq;
-+
-+	/* static members */
-+	unsigned int type;
-+	kdbus_node_free_t free_cb;
-+	kdbus_node_release_t release_cb;
-+	umode_t mode;
-+	kuid_t uid;
-+	kgid_t gid;
-+
-+	/* valid once linked */
-+	char *name;
-+	unsigned int hash;
-+	unsigned int id;
-+	struct kdbus_node *parent; /* may be NULL */
-+
-+	/* valid iff active */
-+	struct mutex lock;
-+	struct rb_node rb;
-+	struct rb_root children;
-+};
-+
-+#define kdbus_node_from_rb(_node) rb_entry((_node), struct kdbus_node, rb)
-+
-+extern struct ida kdbus_node_ida;
-+
-+void kdbus_node_init(struct kdbus_node *node, unsigned int type);
-+
-+int kdbus_node_link(struct kdbus_node *node, struct kdbus_node *parent,
-+		    const char *name);
-+
-+struct kdbus_node *kdbus_node_ref(struct kdbus_node *node);
-+struct kdbus_node *kdbus_node_unref(struct kdbus_node *node);
-+
-+bool kdbus_node_is_active(struct kdbus_node *node);
-+bool kdbus_node_is_deactivated(struct kdbus_node *node);
-+bool kdbus_node_activate(struct kdbus_node *node);
-+void kdbus_node_deactivate(struct kdbus_node *node);
-+
-+bool kdbus_node_acquire(struct kdbus_node *node);
-+void kdbus_node_release(struct kdbus_node *node);
-+
-+struct kdbus_node *kdbus_node_find_child(struct kdbus_node *node,
-+					 const char *name);
-+struct kdbus_node *kdbus_node_find_closest(struct kdbus_node *node,
-+					   unsigned int hash);
-+struct kdbus_node *kdbus_node_next_child(struct kdbus_node *node,
-+					 struct kdbus_node *prev);
-+
-+#endif
-diff --git a/ipc/kdbus/notify.c b/ipc/kdbus/notify.c
-new file mode 100644
-index 0000000..375758c
---- /dev/null
-+++ b/ipc/kdbus/notify.c
-@@ -0,0 +1,204 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ * Copyright (C) 2014-2015 Djalal Harouni <tixxdz@××××××.org>
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#include <linux/fs.h>
-+#include <linux/init.h>
-+#include <linux/module.h>
-+#include <linux/mutex.h>
-+#include <linux/spinlock.h>
-+#include <linux/sched.h>
-+#include <linux/slab.h>
-+
-+#include "bus.h"
-+#include "connection.h"
-+#include "domain.h"
-+#include "endpoint.h"
-+#include "item.h"
-+#include "message.h"
-+#include "notify.h"
-+
-+static inline void kdbus_notify_add_tail(struct kdbus_staging *staging,
-+					 struct kdbus_bus *bus)
-+{
-+	spin_lock(&bus->notify_lock);
-+	list_add_tail(&staging->notify_entry, &bus->notify_list);
-+	spin_unlock(&bus->notify_lock);
-+}
-+
-+static int kdbus_notify_reply(struct kdbus_bus *bus, u64 id,
-+			      u64 cookie, u64 msg_type)
-+{
-+	struct kdbus_staging *s;
-+
-+	s = kdbus_staging_new_kernel(bus, id, cookie, 0, msg_type);
-+	if (IS_ERR(s))
-+		return PTR_ERR(s);
-+
-+	kdbus_notify_add_tail(s, bus);
-+	return 0;
-+}
-+
-+/**
-+ * kdbus_notify_reply_timeout() - queue a timeout reply
-+ * @bus:		Bus which queues the messages
-+ * @id:			The destination's connection ID
-+ * @cookie:		The cookie to set in the reply.
-+ *
-+ * Queues a message that has a KDBUS_ITEM_REPLY_TIMEOUT item attached.
-+ *
-+ * Return: 0 on success, negative errno on failure.
-+ */
-+int kdbus_notify_reply_timeout(struct kdbus_bus *bus, u64 id, u64 cookie)
-+{
-+	return kdbus_notify_reply(bus, id, cookie, KDBUS_ITEM_REPLY_TIMEOUT);
-+}
-+
-+/**
-+ * kdbus_notify_reply_dead() - queue a 'dead' reply
-+ * @bus:		Bus which queues the messages
-+ * @id:			The destination's connection ID
-+ * @cookie:		The cookie to set in the reply.
-+ *
-+ * Queues a message that has a KDBUS_ITEM_REPLY_DEAD item attached.
-+ *
-+ * Return: 0 on success, negative errno on failure.
-+ */
-+int kdbus_notify_reply_dead(struct kdbus_bus *bus, u64 id, u64 cookie)
-+{
-+	return kdbus_notify_reply(bus, id, cookie, KDBUS_ITEM_REPLY_DEAD);
-+}
-+
-+/**
-+ * kdbus_notify_name_change() - queue a notification about a name owner change
-+ * @bus:		Bus which queues the messages
-+ * @type:		The type if the notification; KDBUS_ITEM_NAME_ADD,
-+ *			KDBUS_ITEM_NAME_CHANGE or KDBUS_ITEM_NAME_REMOVE
-+ * @old_id:		The id of the connection that used to own the name
-+ * @new_id:		The id of the new owner connection
-+ * @old_flags:		The flags to pass in the KDBUS_ITEM flags field for
-+ *			the old owner
-+ * @new_flags:		The flags to pass in the KDBUS_ITEM flags field for
-+ *			the new owner
-+ * @name:		The name that was removed or assigned to a new owner
-+ *
-+ * Return: 0 on success, negative errno on failure.
-+ */
-+int kdbus_notify_name_change(struct kdbus_bus *bus, u64 type,
-+			     u64 old_id, u64 new_id,
-+			     u64 old_flags, u64 new_flags,
-+			     const char *name)
-+{
-+	size_t name_len, extra_size;
-+	struct kdbus_staging *s;
-+
-+	name_len = strlen(name) + 1;
-+	extra_size = sizeof(struct kdbus_notify_name_change) + name_len;
-+
-+	s = kdbus_staging_new_kernel(bus, KDBUS_DST_ID_BROADCAST, 0,
-+				     extra_size, type);
-+	if (IS_ERR(s))
-+		return PTR_ERR(s);
-+
-+	s->notify->name_change.old_id.id = old_id;
-+	s->notify->name_change.old_id.flags = old_flags;
-+	s->notify->name_change.new_id.id = new_id;
-+	s->notify->name_change.new_id.flags = new_flags;
-+	memcpy(s->notify->name_change.name, name, name_len);
-+
-+	kdbus_notify_add_tail(s, bus);
-+	return 0;
-+}
-+
-+/**
-+ * kdbus_notify_id_change() - queue a notification about a unique ID change
-+ * @bus:		Bus which queues the messages
-+ * @type:		The type if the notification; KDBUS_ITEM_ID_ADD or
-+ *			KDBUS_ITEM_ID_REMOVE
-+ * @id:			The id of the connection that was added or removed
-+ * @flags:		The flags to pass in the KDBUS_ITEM flags field
-+ *
-+ * Return: 0 on success, negative errno on failure.
-+ */
-+int kdbus_notify_id_change(struct kdbus_bus *bus, u64 type, u64 id, u64 flags)
-+{
-+	struct kdbus_staging *s;
-+	size_t extra_size;
-+
-+	extra_size = sizeof(struct kdbus_notify_id_change);
-+	s = kdbus_staging_new_kernel(bus, KDBUS_DST_ID_BROADCAST, 0,
-+				     extra_size, type);
-+	if (IS_ERR(s))
-+		return PTR_ERR(s);
-+
-+	s->notify->id_change.id = id;
-+	s->notify->id_change.flags = flags;
-+
-+	kdbus_notify_add_tail(s, bus);
-+	return 0;
-+}
-+
-+/**
-+ * kdbus_notify_flush() - send a list of collected messages
-+ * @bus:		Bus which queues the messages
-+ *
-+ * The list is empty after sending the messages.
-+ */
-+void kdbus_notify_flush(struct kdbus_bus *bus)
-+{
-+	LIST_HEAD(notify_list);
-+	struct kdbus_staging *s, *tmp;
-+
-+	mutex_lock(&bus->notify_flush_lock);
-+	down_read(&bus->name_registry->rwlock);
-+
-+	spin_lock(&bus->notify_lock);
-+	list_splice_init(&bus->notify_list, &notify_list);
-+	spin_unlock(&bus->notify_lock);
-+
-+	list_for_each_entry_safe(s, tmp, &notify_list, notify_entry) {
-+		if (s->msg->dst_id != KDBUS_DST_ID_BROADCAST) {
-+			struct kdbus_conn *conn;
-+
-+			conn = kdbus_bus_find_conn_by_id(bus, s->msg->dst_id);
-+			if (conn) {
-+				kdbus_bus_eavesdrop(bus, NULL, s);
-+				kdbus_conn_entry_insert(NULL, conn, s, NULL,
-+							NULL);
-+				kdbus_conn_unref(conn);
-+			}
-+		} else {
-+			kdbus_bus_broadcast(bus, NULL, s);
-+		}
-+
-+		list_del(&s->notify_entry);
-+		kdbus_staging_free(s);
-+	}
-+
-+	up_read(&bus->name_registry->rwlock);
-+	mutex_unlock(&bus->notify_flush_lock);
-+}
-+
-+/**
-+ * kdbus_notify_free() - free a list of collected messages
-+ * @bus:		Bus which queues the messages
-+ */
-+void kdbus_notify_free(struct kdbus_bus *bus)
-+{
-+	struct kdbus_staging *s, *tmp;
-+
-+	list_for_each_entry_safe(s, tmp, &bus->notify_list, notify_entry) {
-+		list_del(&s->notify_entry);
-+		kdbus_staging_free(s);
-+	}
-+}
-diff --git a/ipc/kdbus/notify.h b/ipc/kdbus/notify.h
-new file mode 100644
-index 0000000..03df464
---- /dev/null
-+++ b/ipc/kdbus/notify.h
-@@ -0,0 +1,30 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ * Copyright (C) 2014-2015 Djalal Harouni <tixxdz@××××××.org>
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#ifndef __KDBUS_NOTIFY_H
-+#define __KDBUS_NOTIFY_H
-+
-+struct kdbus_bus;
-+
-+int kdbus_notify_id_change(struct kdbus_bus *bus, u64 type, u64 id, u64 flags);
-+int kdbus_notify_reply_timeout(struct kdbus_bus *bus, u64 id, u64 cookie);
-+int kdbus_notify_reply_dead(struct kdbus_bus *bus, u64 id, u64 cookie);
-+int kdbus_notify_name_change(struct kdbus_bus *bus, u64 type,
-+			     u64 old_id, u64 new_id,
-+			     u64 old_flags, u64 new_flags,
-+			     const char *name);
-+void kdbus_notify_flush(struct kdbus_bus *bus);
-+void kdbus_notify_free(struct kdbus_bus *bus);
-+
-+#endif
-diff --git a/ipc/kdbus/policy.c b/ipc/kdbus/policy.c
-new file mode 100644
-index 0000000..f2618e15
---- /dev/null
-+++ b/ipc/kdbus/policy.c
-@@ -0,0 +1,489 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ * Copyright (C) 2014-2015 Djalal Harouni
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#include <linux/dcache.h>
-+#include <linux/fs.h>
-+#include <linux/init.h>
-+#include <linux/mutex.h>
-+#include <linux/sched.h>
-+#include <linux/sizes.h>
-+#include <linux/slab.h>
-+#include <linux/uaccess.h>
-+
-+#include "bus.h"
-+#include "connection.h"
-+#include "domain.h"
-+#include "item.h"
-+#include "names.h"
-+#include "policy.h"
-+
-+#define KDBUS_POLICY_HASH_SIZE	64
-+
-+/**
-+ * struct kdbus_policy_db_entry_access - a database entry access item
-+ * @type:		One of KDBUS_POLICY_ACCESS_* types
-+ * @access:		Access to grant. One of KDBUS_POLICY_*
-+ * @uid:		For KDBUS_POLICY_ACCESS_USER, the global uid
-+ * @gid:		For KDBUS_POLICY_ACCESS_GROUP, the global gid
-+ * @list:		List entry item for the entry's list
-+ *
-+ * This is the internal version of struct kdbus_policy_db_access.
-+ */
-+struct kdbus_policy_db_entry_access {
-+	u8 type;		/* USER, GROUP, WORLD */
-+	u8 access;		/* OWN, TALK, SEE */
-+	union {
-+		kuid_t uid;	/* global uid */
-+		kgid_t gid;	/* global gid */
-+	};
-+	struct list_head list;
-+};
-+
-+/**
-+ * struct kdbus_policy_db_entry - a policy database entry
-+ * @name:		The name to match the policy entry against
-+ * @hentry:		The hash entry for the database's entries_hash
-+ * @access_list:	List head for keeping tracks of the entry's
-+ *			access items.
-+ * @owner:		The owner of this entry. Can be a kdbus_conn or
-+ *			a kdbus_ep object.
-+ * @wildcard:		The name is a wildcard, such as ending on '.*'
-+ */
-+struct kdbus_policy_db_entry {
-+	char *name;
-+	struct hlist_node hentry;
-+	struct list_head access_list;
-+	const void *owner;
-+	bool wildcard:1;
-+};
-+
-+static void kdbus_policy_entry_free(struct kdbus_policy_db_entry *e)
-+{
-+	struct kdbus_policy_db_entry_access *a, *tmp;
-+
-+	list_for_each_entry_safe(a, tmp, &e->access_list, list) {
-+		list_del(&a->list);
-+		kfree(a);
-+	}
-+
-+	kfree(e->name);
-+	kfree(e);
-+}
-+
-+static unsigned int kdbus_strnhash(const char *str, size_t len)
-+{
-+	unsigned long hash = init_name_hash();
-+
-+	while (len--)
-+		hash = partial_name_hash(*str++, hash);
-+
-+	return end_name_hash(hash);
-+}
-+
-+static const struct kdbus_policy_db_entry *
-+kdbus_policy_lookup(struct kdbus_policy_db *db, const char *name, u32 hash)
-+{
-+	struct kdbus_policy_db_entry *e;
-+	const char *dot;
-+	size_t len;
-+
-+	/* find exact match */
-+	hash_for_each_possible(db->entries_hash, e, hentry, hash)
-+		if (strcmp(e->name, name) == 0 && !e->wildcard)
-+			return e;
-+
-+	/* find wildcard match */
-+
-+	dot = strrchr(name, '.');
-+	if (!dot)
-+		return NULL;
-+
-+	len = dot - name;
-+	hash = kdbus_strnhash(name, len);
-+
-+	hash_for_each_possible(db->entries_hash, e, hentry, hash)
-+		if (e->wildcard && !strncmp(e->name, name, len) &&
-+		    !e->name[len])
-+			return e;
-+
-+	return NULL;
-+}
-+
-+/**
-+ * kdbus_policy_db_clear - release all memory from a policy db
-+ * @db:		The policy database
-+ */
-+void kdbus_policy_db_clear(struct kdbus_policy_db *db)
-+{
-+	struct kdbus_policy_db_entry *e;
-+	struct hlist_node *tmp;
-+	unsigned int i;
-+
-+	/* purge entries */
-+	down_write(&db->entries_rwlock);
-+	hash_for_each_safe(db->entries_hash, i, tmp, e, hentry) {
-+		hash_del(&e->hentry);
-+		kdbus_policy_entry_free(e);
-+	}
-+	up_write(&db->entries_rwlock);
-+}
-+
-+/**
-+ * kdbus_policy_db_init() - initialize a new policy database
-+ * @db:		The location of the database
-+ *
-+ * This initializes a new policy-db. The underlying memory must have been
-+ * cleared to zero by the caller.
-+ */
-+void kdbus_policy_db_init(struct kdbus_policy_db *db)
-+{
-+	hash_init(db->entries_hash);
-+	init_rwsem(&db->entries_rwlock);
-+}
-+
-+/**
-+ * kdbus_policy_query_unlocked() - Query the policy database
-+ * @db:		Policy database
-+ * @cred:	Credentials to test against
-+ * @name:	Name to query
-+ * @hash:	Hash value of @name
-+ *
-+ * Same as kdbus_policy_query() but requires the caller to lock the policy
-+ * database against concurrent writes.
-+ *
-+ * Return: The highest KDBUS_POLICY_* access type found, or -EPERM if none.
-+ */
-+int kdbus_policy_query_unlocked(struct kdbus_policy_db *db,
-+				const struct cred *cred, const char *name,
-+				unsigned int hash)
-+{
-+	struct kdbus_policy_db_entry_access *a;
-+	const struct kdbus_policy_db_entry *e;
-+	int i, highest = -EPERM;
-+
-+	e = kdbus_policy_lookup(db, name, hash);
-+	if (!e)
-+		return -EPERM;
-+
-+	list_for_each_entry(a, &e->access_list, list) {
-+		if ((int)a->access <= highest)
-+			continue;
-+
-+		switch (a->type) {
-+		case KDBUS_POLICY_ACCESS_USER:
-+			if (uid_eq(cred->euid, a->uid))
-+				highest = a->access;
-+			break;
-+		case KDBUS_POLICY_ACCESS_GROUP:
-+			if (gid_eq(cred->egid, a->gid)) {
-+				highest = a->access;
-+				break;
-+			}
-+
-+			for (i = 0; i < cred->group_info->ngroups; i++) {
-+				kgid_t gid = GROUP_AT(cred->group_info, i);
-+
-+				if (gid_eq(gid, a->gid)) {
-+					highest = a->access;
-+					break;
-+				}
-+			}
-+
-+			break;
-+		case KDBUS_POLICY_ACCESS_WORLD:
-+			highest = a->access;
-+			break;
-+		}
-+
-+		/* OWN is the highest possible policy */
-+		if (highest >= KDBUS_POLICY_OWN)
-+			break;
-+	}
-+
-+	return highest;
-+}
-+
-+/**
-+ * kdbus_policy_query() - Query the policy database
-+ * @db:		Policy database
-+ * @cred:	Credentials to test against
-+ * @name:	Name to query
-+ * @hash:	Hash value of @name
-+ *
-+ * Query the policy database @db for the access rights of @cred to the name
-+ * @name. The access rights of @cred are returned, or -EPERM if no access is
-+ * granted.
-+ *
-+ * This call effectively searches for the highest access-right granted to
-+ * @cred. The caller should really cache those as policy lookups are rather
-+ * expensive.
-+ *
-+ * Return: The highest KDBUS_POLICY_* access type found, or -EPERM if none.
-+ */
-+int kdbus_policy_query(struct kdbus_policy_db *db, const struct cred *cred,
-+		       const char *name, unsigned int hash)
-+{
-+	int ret;
-+
-+	down_read(&db->entries_rwlock);
-+	ret = kdbus_policy_query_unlocked(db, cred, name, hash);
-+	up_read(&db->entries_rwlock);
-+
-+	return ret;
-+}
-+
-+static void __kdbus_policy_remove_owner(struct kdbus_policy_db *db,
-+					const void *owner)
-+{
-+	struct kdbus_policy_db_entry *e;
-+	struct hlist_node *tmp;
-+	int i;
-+
-+	hash_for_each_safe(db->entries_hash, i, tmp, e, hentry)
-+		if (e->owner == owner) {
-+			hash_del(&e->hentry);
-+			kdbus_policy_entry_free(e);
-+		}
-+}
-+
-+/**
-+ * kdbus_policy_remove_owner() - remove all entries related to a connection
-+ * @db:		The policy database
-+ * @owner:	The connection which items to remove
-+ */
-+void kdbus_policy_remove_owner(struct kdbus_policy_db *db,
-+			       const void *owner)
-+{
-+	down_write(&db->entries_rwlock);
-+	__kdbus_policy_remove_owner(db, owner);
-+	up_write(&db->entries_rwlock);
-+}
-+
-+/*
-+ * Convert user provided policy access to internal kdbus policy
-+ * access
-+ */
-+static struct kdbus_policy_db_entry_access *
-+kdbus_policy_make_access(const struct kdbus_policy_access *uaccess)
-+{
-+	int ret;
-+	struct kdbus_policy_db_entry_access *a;
-+
-+	a = kzalloc(sizeof(*a), GFP_KERNEL);
-+	if (!a)
-+		return ERR_PTR(-ENOMEM);
-+
-+	ret = -EINVAL;
-+	switch (uaccess->access) {
-+	case KDBUS_POLICY_SEE:
-+	case KDBUS_POLICY_TALK:
-+	case KDBUS_POLICY_OWN:
-+		a->access = uaccess->access;
-+		break;
-+	default:
-+		goto err;
-+	}
-+
-+	switch (uaccess->type) {
-+	case KDBUS_POLICY_ACCESS_USER:
-+		a->uid = make_kuid(current_user_ns(), uaccess->id);
-+		if (!uid_valid(a->uid))
-+			goto err;
-+
-+		break;
-+	case KDBUS_POLICY_ACCESS_GROUP:
-+		a->gid = make_kgid(current_user_ns(), uaccess->id);
-+		if (!gid_valid(a->gid))
-+			goto err;
-+
-+		break;
-+	case KDBUS_POLICY_ACCESS_WORLD:
-+		break;
-+	default:
-+		goto err;
-+	}
-+
-+	a->type = uaccess->type;
-+
-+	return a;
-+
-+err:
-+	kfree(a);
-+	return ERR_PTR(ret);
-+}
-+
-+/**
-+ * kdbus_policy_set() - set a connection's policy rules
-+ * @db:				The policy database
-+ * @items:			A list of kdbus_item elements that contain both
-+ *				names and access rules to set.
-+ * @items_size:			The total size of the items.
-+ * @max_policies:		The maximum number of policy entries to allow.
-+ *				Pass 0 for no limit.
-+ * @allow_wildcards:		Boolean value whether wildcard entries (such
-+ *				ending on '.*') should be allowed.
-+ * @owner:			The owner of the new policy items.
-+ *
-+ * This function sets a new set of policies for a given owner. The names and
-+ * access rules are gathered by walking the list of items passed in as
-+ * argument. An item of type KDBUS_ITEM_NAME is expected before any number of
-+ * KDBUS_ITEM_POLICY_ACCESS items. If there are more repetitions of this
-+ * pattern than denoted in @max_policies, -EINVAL is returned.
-+ *
-+ * In order to allow atomic replacement of rules, the function first removes
-+ * all entries that have been created for the given owner previously.
-+ *
-+ * Callers to this function must make sure that the owner is a custom
-+ * endpoint, or if the endpoint is a default endpoint, then it must be
-+ * either a policy holder or an activator.
-+ *
-+ * Return: 0 on success, negative errno on failure.
-+ */
-+int kdbus_policy_set(struct kdbus_policy_db *db,
-+		     const struct kdbus_item *items,
-+		     size_t items_size,
-+		     size_t max_policies,
-+		     bool allow_wildcards,
-+		     const void *owner)
-+{
-+	struct kdbus_policy_db_entry_access *a;
-+	struct kdbus_policy_db_entry *e, *p;
-+	const struct kdbus_item *item;
-+	struct hlist_node *tmp;
-+	HLIST_HEAD(entries);
-+	HLIST_HEAD(restore);
-+	size_t count = 0;
-+	int i, ret = 0;
-+	u32 hash;
-+
-+	/* Walk the list of items and look for new policies */
-+	e = NULL;
-+	KDBUS_ITEMS_FOREACH(item, items, items_size) {
-+		switch (item->type) {
-+		case KDBUS_ITEM_NAME: {
-+			size_t len;
-+
-+			if (max_policies && ++count > max_policies) {
-+				ret = -E2BIG;
-+				goto exit;
-+			}
-+
-+			if (!kdbus_name_is_valid(item->str, true)) {
-+				ret = -EINVAL;
-+				goto exit;
-+			}
-+
-+			e = kzalloc(sizeof(*e), GFP_KERNEL);
-+			if (!e) {
-+				ret = -ENOMEM;
-+				goto exit;
-+			}
-+
-+			INIT_LIST_HEAD(&e->access_list);
-+			e->owner = owner;
-+			hlist_add_head(&e->hentry, &entries);
-+
-+			e->name = kstrdup(item->str, GFP_KERNEL);
-+			if (!e->name) {
-+				ret = -ENOMEM;
-+				goto exit;
-+			}
-+
-+			/*
-+			 * If a supplied name ends with an '.*', cut off that
-+			 * part, only store anything before it, and mark the
-+			 * entry as wildcard.
-+			 */
-+			len = strlen(e->name);
-+			if (len > 2 &&
-+			    e->name[len - 3] == '.' &&
-+			    e->name[len - 2] == '*') {
-+				if (!allow_wildcards) {
-+					ret = -EINVAL;
-+					goto exit;
-+				}
-+
-+				e->name[len - 3] = '\0';
-+				e->wildcard = true;
-+			}
-+
-+			break;
-+		}
-+
-+		case KDBUS_ITEM_POLICY_ACCESS:
-+			if (!e) {
-+				ret = -EINVAL;
-+				goto exit;
-+			}
-+
-+			a = kdbus_policy_make_access(&item->policy_access);
-+			if (IS_ERR(a)) {
-+				ret = PTR_ERR(a);
-+				goto exit;
-+			}
-+
-+			list_add_tail(&a->list, &e->access_list);
-+			break;
-+		}
-+	}
-+
-+	down_write(&db->entries_rwlock);
-+
-+	/* remember previous entries to restore in case of failure */
-+	hash_for_each_safe(db->entries_hash, i, tmp, e, hentry)
-+		if (e->owner == owner) {
-+			hash_del(&e->hentry);
-+			hlist_add_head(&e->hentry, &restore);
-+		}
-+
-+	hlist_for_each_entry_safe(e, tmp, &entries, hentry) {
-+		/* prevent duplicates */
-+		hash = kdbus_strhash(e->name);
-+		hash_for_each_possible(db->entries_hash, p, hentry, hash)
-+			if (strcmp(e->name, p->name) == 0 &&
-+			    e->wildcard == p->wildcard) {
-+				ret = -EEXIST;
-+				goto restore;
-+			}
-+
-+		hlist_del(&e->hentry);
-+		hash_add(db->entries_hash, &e->hentry, hash);
-+	}
-+
-+restore:
-+	/* if we failed, flush all entries we added so far */
-+	if (ret < 0)
-+		__kdbus_policy_remove_owner(db, owner);
-+
-+	/* if we failed, restore entries, otherwise release them */
-+	hlist_for_each_entry_safe(e, tmp, &restore, hentry) {
-+		hlist_del(&e->hentry);
-+		if (ret < 0) {
-+			hash = kdbus_strhash(e->name);
-+			hash_add(db->entries_hash, &e->hentry, hash);
-+		} else {
-+			kdbus_policy_entry_free(e);
-+		}
-+	}
-+
-+	up_write(&db->entries_rwlock);
-+
-+exit:
-+	hlist_for_each_entry_safe(e, tmp, &entries, hentry) {
-+		hlist_del(&e->hentry);
-+		kdbus_policy_entry_free(e);
-+	}
-+
-+	return ret;
-+}
-diff --git a/ipc/kdbus/policy.h b/ipc/kdbus/policy.h
-new file mode 100644
-index 0000000..15dd7bc
---- /dev/null
-+++ b/ipc/kdbus/policy.h
-@@ -0,0 +1,51 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#ifndef __KDBUS_POLICY_H
-+#define __KDBUS_POLICY_H
-+
-+#include <linux/hashtable.h>
-+#include <linux/rwsem.h>
-+
-+struct kdbus_conn;
-+struct kdbus_item;
-+
-+/**
-+ * struct kdbus_policy_db - policy database
-+ * @entries_hash:	Hashtable of entries
-+ * @entries_rwlock:	Mutex to protect the database's access entries
-+ */
-+struct kdbus_policy_db {
-+	DECLARE_HASHTABLE(entries_hash, 6);
-+	struct rw_semaphore entries_rwlock;
-+};
-+
-+void kdbus_policy_db_init(struct kdbus_policy_db *db);
-+void kdbus_policy_db_clear(struct kdbus_policy_db *db);
-+
-+int kdbus_policy_query_unlocked(struct kdbus_policy_db *db,
-+				const struct cred *cred, const char *name,
-+				unsigned int hash);
-+int kdbus_policy_query(struct kdbus_policy_db *db, const struct cred *cred,
-+		       const char *name, unsigned int hash);
-+
-+void kdbus_policy_remove_owner(struct kdbus_policy_db *db,
-+			       const void *owner);
-+int kdbus_policy_set(struct kdbus_policy_db *db,
-+		     const struct kdbus_item *items,
-+		     size_t items_size,
-+		     size_t max_policies,
-+		     bool allow_wildcards,
-+		     const void *owner);
-+
-+#endif
-diff --git a/ipc/kdbus/pool.c b/ipc/kdbus/pool.c
-new file mode 100644
-index 0000000..63ccd55
---- /dev/null
-+++ b/ipc/kdbus/pool.c
-@@ -0,0 +1,728 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ * Copyright (C) 2014-2015 Djalal Harouni <tixxdz@××××××.org>
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#include <linux/aio.h>
-+#include <linux/file.h>
-+#include <linux/fs.h>
-+#include <linux/highmem.h>
-+#include <linux/init.h>
-+#include <linux/mm.h>
-+#include <linux/module.h>
-+#include <linux/pagemap.h>
-+#include <linux/rbtree.h>
-+#include <linux/sched.h>
-+#include <linux/shmem_fs.h>
-+#include <linux/sizes.h>
-+#include <linux/slab.h>
-+#include <linux/uaccess.h>
-+#include <linux/uio.h>
-+
-+#include "pool.h"
-+#include "util.h"
-+
-+/**
-+ * struct kdbus_pool - the receiver's buffer
-+ * @f:			The backing shmem file
-+ * @size:		The size of the file
-+ * @accounted_size:	Currently accounted memory in bytes
-+ * @lock:		Pool data lock
-+ * @slices:		All slices sorted by address
-+ * @slices_busy:	Tree of allocated slices
-+ * @slices_free:	Tree of free slices
-+ *
-+ * The receiver's buffer, managed as a pool of allocated and free
-+ * slices containing the queued messages.
-+ *
-+ * Messages sent with KDBUS_CMD_SEND are copied directly by the
-+ * sending process into the receiver's pool.
-+ *
-+ * Messages received with KDBUS_CMD_RECV just return the offset
-+ * to the data placed in the pool.
-+ *
-+ * The internally allocated memory needs to be returned by the receiver
-+ * with KDBUS_CMD_FREE.
-+ */
-+struct kdbus_pool {
-+	struct file *f;
-+	size_t size;
-+	size_t accounted_size;
-+	struct mutex lock;
-+
-+	struct list_head slices;
-+	struct rb_root slices_busy;
-+	struct rb_root slices_free;
-+};
-+
-+/**
-+ * struct kdbus_pool_slice - allocated element in kdbus_pool
-+ * @pool:		Pool this slice belongs to
-+ * @off:		Offset of slice in the shmem file
-+ * @size:		Size of slice
-+ * @entry:		Entry in "all slices" list
-+ * @rb_node:		Entry in free or busy list
-+ * @free:		Unused slice
-+ * @accounted:		Accounted as queue slice
-+ * @ref_kernel:		Kernel holds a reference
-+ * @ref_user:		Userspace holds a reference
-+ *
-+ * The pool has one or more slices, always spanning the entire size of the
-+ * pool.
-+ *
-+ * Every slice is an element in a list sorted by the buffer address, to
-+ * provide access to the next neighbor slice.
-+ *
-+ * Every slice is member in either the busy or the free tree. The free
-+ * tree is organized by slice size, the busy tree organized by buffer
-+ * offset.
-+ */
-+struct kdbus_pool_slice {
-+	struct kdbus_pool *pool;
-+	size_t off;
-+	size_t size;
-+
-+	struct list_head entry;
-+	struct rb_node rb_node;
-+
-+	bool free:1;
-+	bool accounted:1;
-+	bool ref_kernel:1;
-+	bool ref_user:1;
-+};
-+
-+static struct kdbus_pool_slice *kdbus_pool_slice_new(struct kdbus_pool *pool,
-+						     size_t off, size_t size)
-+{
-+	struct kdbus_pool_slice *slice;
-+
-+	slice = kzalloc(sizeof(*slice), GFP_KERNEL);
-+	if (!slice)
-+		return NULL;
-+
-+	slice->pool = pool;
-+	slice->off = off;
-+	slice->size = size;
-+	slice->free = true;
-+	return slice;
-+}
-+
-+/* insert a slice into the free tree */
-+static void kdbus_pool_add_free_slice(struct kdbus_pool *pool,
-+				      struct kdbus_pool_slice *slice)
-+{
-+	struct rb_node **n;
-+	struct rb_node *pn = NULL;
-+
-+	n = &pool->slices_free.rb_node;
-+	while (*n) {
-+		struct kdbus_pool_slice *pslice;
-+
-+		pn = *n;
-+		pslice = rb_entry(pn, struct kdbus_pool_slice, rb_node);
-+		if (slice->size < pslice->size)
-+			n = &pn->rb_left;
-+		else
-+			n = &pn->rb_right;
-+	}
-+
-+	rb_link_node(&slice->rb_node, pn, n);
-+	rb_insert_color(&slice->rb_node, &pool->slices_free);
-+}
-+
-+/* insert a slice into the busy tree */
-+static void kdbus_pool_add_busy_slice(struct kdbus_pool *pool,
-+				      struct kdbus_pool_slice *slice)
-+{
-+	struct rb_node **n;
-+	struct rb_node *pn = NULL;
-+
-+	n = &pool->slices_busy.rb_node;
-+	while (*n) {
-+		struct kdbus_pool_slice *pslice;
-+
-+		pn = *n;
-+		pslice = rb_entry(pn, struct kdbus_pool_slice, rb_node);
-+		if (slice->off < pslice->off)
-+			n = &pn->rb_left;
-+		else if (slice->off > pslice->off)
-+			n = &pn->rb_right;
-+		else
-+			BUG();
-+	}
-+
-+	rb_link_node(&slice->rb_node, pn, n);
-+	rb_insert_color(&slice->rb_node, &pool->slices_busy);
-+}
-+
-+static struct kdbus_pool_slice *kdbus_pool_find_slice(struct kdbus_pool *pool,
-+						      size_t off)
-+{
-+	struct rb_node *n;
-+
-+	n = pool->slices_busy.rb_node;
-+	while (n) {
-+		struct kdbus_pool_slice *s;
-+
-+		s = rb_entry(n, struct kdbus_pool_slice, rb_node);
-+		if (off < s->off)
-+			n = n->rb_left;
-+		else if (off > s->off)
-+			n = n->rb_right;
-+		else
-+			return s;
-+	}
-+
-+	return NULL;
-+}
-+
-+/**
-+ * kdbus_pool_slice_alloc() - allocate memory from a pool
-+ * @pool:	The receiver's pool
-+ * @size:	The number of bytes to allocate
-+ * @accounted:	Whether this slice should be accounted for
-+ *
-+ * The returned slice is used for kdbus_pool_slice_release() to
-+ * free the allocated memory. If either @kvec or @iovec is non-NULL, the data
-+ * will be copied from kernel or userspace memory into the new slice at
-+ * offset 0.
-+ *
-+ * Return: the allocated slice on success, ERR_PTR on failure.
-+ */
-+struct kdbus_pool_slice *kdbus_pool_slice_alloc(struct kdbus_pool *pool,
-+						size_t size, bool accounted)
-+{
-+	size_t slice_size = KDBUS_ALIGN8(size);
-+	struct rb_node *n, *found = NULL;
-+	struct kdbus_pool_slice *s;
-+	int ret = 0;
-+
-+	if (WARN_ON(!size))
-+		return ERR_PTR(-EINVAL);
-+
-+	/* search a free slice with the closest matching size */
-+	mutex_lock(&pool->lock);
-+	n = pool->slices_free.rb_node;
-+	while (n) {
-+		s = rb_entry(n, struct kdbus_pool_slice, rb_node);
-+		if (slice_size < s->size) {
-+			found = n;
-+			n = n->rb_left;
-+		} else if (slice_size > s->size) {
-+			n = n->rb_right;
-+		} else {
-+			found = n;
-+			break;
-+		}
-+	}
-+
-+	/* no slice with the minimum size found in the pool */
-+	if (!found) {
-+		ret = -EXFULL;
-+		goto exit_unlock;
-+	}
-+
-+	/* no exact match, use the closest one */
-+	if (!n) {
-+		struct kdbus_pool_slice *s_new;
-+
-+		s = rb_entry(found, struct kdbus_pool_slice, rb_node);
-+
-+		/* split-off the remainder of the size to its own slice */
-+		s_new = kdbus_pool_slice_new(pool, s->off + slice_size,
-+					     s->size - slice_size);
-+		if (!s_new) {
-+			ret = -ENOMEM;
-+			goto exit_unlock;
-+		}
-+
-+		list_add(&s_new->entry, &s->entry);
-+		kdbus_pool_add_free_slice(pool, s_new);
-+
-+		/* adjust our size now that we split-off another slice */
-+		s->size = slice_size;
-+	}
-+
-+	/* move slice from free to the busy tree */
-+	rb_erase(found, &pool->slices_free);
-+	kdbus_pool_add_busy_slice(pool, s);
-+
-+	WARN_ON(s->ref_kernel || s->ref_user);
-+
-+	s->ref_kernel = true;
-+	s->free = false;
-+	s->accounted = accounted;
-+	if (accounted)
-+		pool->accounted_size += s->size;
-+	mutex_unlock(&pool->lock);
-+
-+	return s;
-+
-+exit_unlock:
-+	mutex_unlock(&pool->lock);
-+	return ERR_PTR(ret);
-+}
-+
-+static void __kdbus_pool_slice_release(struct kdbus_pool_slice *slice)
-+{
-+	struct kdbus_pool *pool = slice->pool;
-+
-+	/* don't free the slice if either has a reference */
-+	if (slice->ref_kernel || slice->ref_user)
-+		return;
-+
-+	if (WARN_ON(slice->free))
-+		return;
-+
-+	rb_erase(&slice->rb_node, &pool->slices_busy);
-+
-+	/* merge with the next free slice */
-+	if (!list_is_last(&slice->entry, &pool->slices)) {
-+		struct kdbus_pool_slice *s;
-+
-+		s = list_entry(slice->entry.next,
-+			       struct kdbus_pool_slice, entry);
-+		if (s->free) {
-+			rb_erase(&s->rb_node, &pool->slices_free);
-+			list_del(&s->entry);
-+			slice->size += s->size;
-+			kfree(s);
-+		}
-+	}
-+
-+	/* merge with previous free slice */
-+	if (pool->slices.next != &slice->entry) {
-+		struct kdbus_pool_slice *s;
-+
-+		s = list_entry(slice->entry.prev,
-+			       struct kdbus_pool_slice, entry);
-+		if (s->free) {
-+			rb_erase(&s->rb_node, &pool->slices_free);
-+			list_del(&slice->entry);
-+			s->size += slice->size;
-+			kfree(slice);
-+			slice = s;
-+		}
-+	}
-+
-+	slice->free = true;
-+	kdbus_pool_add_free_slice(pool, slice);
-+}
-+
-+/**
-+ * kdbus_pool_slice_release() - drop kernel-reference on allocated slice
-+ * @slice:		Slice allocated from the pool
-+ *
-+ * This releases the kernel-reference on the given slice. If the
-+ * kernel-reference and the user-reference on a slice are dropped, the slice is
-+ * returned to the pool.
-+ *
-+ * So far, we do not implement full ref-counting on slices. Each, kernel and
-+ * user-space can have exactly one reference to a slice. If both are dropped at
-+ * the same time, the slice is released.
-+ */
-+void kdbus_pool_slice_release(struct kdbus_pool_slice *slice)
-+{
-+	struct kdbus_pool *pool;
-+
-+	if (!slice)
-+		return;
-+
-+	/* @slice may be freed, so keep local ptr to @pool */
-+	pool = slice->pool;
-+
-+	mutex_lock(&pool->lock);
-+	/* kernel must own a ref to @slice to drop it */
-+	WARN_ON(!slice->ref_kernel);
-+	slice->ref_kernel = false;
-+	/* no longer kernel-owned, de-account slice */
-+	if (slice->accounted && !WARN_ON(pool->accounted_size < slice->size))
-+		pool->accounted_size -= slice->size;
-+	__kdbus_pool_slice_release(slice);
-+	mutex_unlock(&pool->lock);
-+}
-+
-+/**
-+ * kdbus_pool_release_offset() - release a public offset
-+ * @pool:		pool to operate on
-+ * @off:		offset to release
-+ *
-+ * This should be called whenever user-space frees a slice given to them. It
-+ * verifies the slice is available and public, and then drops it. It ensures
-+ * correct locking and barriers against queues.
-+ *
-+ * Return: 0 on success, ENXIO if the offset is invalid or not public.
-+ */
-+int kdbus_pool_release_offset(struct kdbus_pool *pool, size_t off)
-+{
-+	struct kdbus_pool_slice *slice;
-+	int ret = 0;
-+
-+	/* 'pool->size' is used as dummy offset for empty slices */
-+	if (off == pool->size)
-+		return 0;
-+
-+	mutex_lock(&pool->lock);
-+	slice = kdbus_pool_find_slice(pool, off);
-+	if (slice && slice->ref_user) {
-+		slice->ref_user = false;
-+		__kdbus_pool_slice_release(slice);
-+	} else {
-+		ret = -ENXIO;
-+	}
-+	mutex_unlock(&pool->lock);
-+
-+	return ret;
-+}
-+
-+/**
-+ * kdbus_pool_publish_empty() - publish empty slice to user-space
-+ * @pool:		pool to operate on
-+ * @off:		output storage for offset, or NULL
-+ * @size:		output storage for size, or NULL
-+ *
-+ * This is the same as kdbus_pool_slice_publish(), but uses a dummy slice with
-+ * size 0. The returned offset points to the end of the pool and is never
-+ * returned on real slices.
-+ */
-+void kdbus_pool_publish_empty(struct kdbus_pool *pool, u64 *off, u64 *size)
-+{
-+	if (off)
-+		*off = pool->size;
-+	if (size)
-+		*size = 0;
-+}
-+
-+/**
-+ * kdbus_pool_slice_publish() - publish slice to user-space
-+ * @slice:		The slice
-+ * @out_offset:		Output storage for offset, or NULL
-+ * @out_size:		Output storage for size, or NULL
-+ *
-+ * This prepares a slice to be published to user-space.
-+ *
-+ * This call combines the following operations:
-+ *   * the memory region is flushed so the user's memory view is consistent
-+ *   * the slice is marked as referenced by user-space, so user-space has to
-+ *     call KDBUS_CMD_FREE to release it
-+ *   * the offset and size of the slice are written to the given output
-+ *     arguments, if non-NULL
-+ */
-+void kdbus_pool_slice_publish(struct kdbus_pool_slice *slice,
-+			      u64 *out_offset, u64 *out_size)
-+{
-+	mutex_lock(&slice->pool->lock);
-+	/* kernel must own a ref to @slice to gain a user-space ref */
-+	WARN_ON(!slice->ref_kernel);
-+	slice->ref_user = true;
-+	mutex_unlock(&slice->pool->lock);
-+
-+	if (out_offset)
-+		*out_offset = slice->off;
-+	if (out_size)
-+		*out_size = slice->size;
-+}
-+
-+/**
-+ * kdbus_pool_slice_offset() - Get a slice's offset inside the pool
-+ * @slice:	Slice to return the offset of
-+ *
-+ * Return: The internal offset @slice inside the pool.
-+ */
-+off_t kdbus_pool_slice_offset(const struct kdbus_pool_slice *slice)
-+{
-+	return slice->off;
-+}
-+
-+/**
-+ * kdbus_pool_slice_size() - get size of a pool slice
-+ * @slice:	slice to query
-+ *
-+ * Return: size of the given slice
-+ */
-+size_t kdbus_pool_slice_size(const struct kdbus_pool_slice *slice)
-+{
-+	return slice->size;
-+}
-+
-+/**
-+ * kdbus_pool_new() - create a new pool
-+ * @name:		Name of the (deleted) file which shows up in
-+ *			/proc, used for debugging
-+ * @size:		Maximum size of the pool
-+ *
-+ * Return: a new kdbus_pool on success, ERR_PTR on failure.
-+ */
-+struct kdbus_pool *kdbus_pool_new(const char *name, size_t size)
-+{
-+	struct kdbus_pool_slice *s;
-+	struct kdbus_pool *p;
-+	struct file *f;
-+	char *n = NULL;
-+	int ret;
-+
-+	p = kzalloc(sizeof(*p), GFP_KERNEL);
-+	if (!p)
-+		return ERR_PTR(-ENOMEM);
-+
-+	if (name) {
-+		n = kasprintf(GFP_KERNEL, KBUILD_MODNAME "-conn:%s", name);
-+		if (!n) {
-+			ret = -ENOMEM;
-+			goto exit_free;
-+		}
-+	}
-+
-+	f = shmem_file_setup(n ?: KBUILD_MODNAME "-conn", size, 0);
-+	kfree(n);
-+
-+	if (IS_ERR(f)) {
-+		ret = PTR_ERR(f);
-+		goto exit_free;
-+	}
-+
-+	ret = get_write_access(file_inode(f));
-+	if (ret < 0)
-+		goto exit_put_shmem;
-+
-+	/* allocate first slice spanning the entire pool */
-+	s = kdbus_pool_slice_new(p, 0, size);
-+	if (!s) {
-+		ret = -ENOMEM;
-+		goto exit_put_write;
-+	}
-+
-+	p->f = f;
-+	p->size = size;
-+	p->slices_free = RB_ROOT;
-+	p->slices_busy = RB_ROOT;
-+	mutex_init(&p->lock);
-+
-+	INIT_LIST_HEAD(&p->slices);
-+	list_add(&s->entry, &p->slices);
-+
-+	kdbus_pool_add_free_slice(p, s);
-+	return p;
-+
-+exit_put_write:
-+	put_write_access(file_inode(f));
-+exit_put_shmem:
-+	fput(f);
-+exit_free:
-+	kfree(p);
-+	return ERR_PTR(ret);
-+}
-+
-+/**
-+ * kdbus_pool_free() - destroy pool
-+ * @pool:		The receiver's pool
-+ */
-+void kdbus_pool_free(struct kdbus_pool *pool)
-+{
-+	struct kdbus_pool_slice *s, *tmp;
-+
-+	if (!pool)
-+		return;
-+
-+	list_for_each_entry_safe(s, tmp, &pool->slices, entry) {
-+		list_del(&s->entry);
-+		kfree(s);
-+	}
-+
-+	put_write_access(file_inode(pool->f));
-+	fput(pool->f);
-+	kfree(pool);
-+}
-+
-+/**
-+ * kdbus_pool_accounted() - retrieve accounting information
-+ * @pool:		pool to query
-+ * @size:		output for overall pool size
-+ * @acc:		output for currently accounted size
-+ *
-+ * This returns accounting information of the pool. Note that the data might
-+ * change after the function returns, as the pool lock is dropped. You need to
-+ * protect the data via other means, if you need reliable accounting.
-+ */
-+void kdbus_pool_accounted(struct kdbus_pool *pool, size_t *size, size_t *acc)
-+{
-+	mutex_lock(&pool->lock);
-+	if (size)
-+		*size = pool->size;
-+	if (acc)
-+		*acc = pool->accounted_size;
-+	mutex_unlock(&pool->lock);
-+}
-+
-+/**
-+ * kdbus_pool_slice_copy_iovec() - copy user memory to a slice
-+ * @slice:		The slice to write to
-+ * @off:		Offset in the slice to write to
-+ * @iov:		iovec array, pointing to data to copy
-+ * @iov_len:		Number of elements in @iov
-+ * @total_len:		Total number of bytes described in members of @iov
-+ *
-+ * User memory referenced by @iov will be copied into @slice at offset @off.
-+ *
-+ * Return: the numbers of bytes copied, negative errno on failure.
-+ */
-+ssize_t
-+kdbus_pool_slice_copy_iovec(const struct kdbus_pool_slice *slice, loff_t off,
-+			    struct iovec *iov, size_t iov_len, size_t total_len)
-+{
-+	struct iov_iter iter;
-+	ssize_t len;
-+
-+	if (WARN_ON(off + total_len > slice->size))
-+		return -EFAULT;
-+
-+	off += slice->off;
-+	iov_iter_init(&iter, WRITE, iov, iov_len, total_len);
-+	len = vfs_iter_write(slice->pool->f, &iter, &off);
-+
-+	return (len >= 0 && len != total_len) ? -EFAULT : len;
-+}
-+
-+/**
-+ * kdbus_pool_slice_copy_kvec() - copy kernel memory to a slice
-+ * @slice:		The slice to write to
-+ * @off:		Offset in the slice to write to
-+ * @kvec:		kvec array, pointing to data to copy
-+ * @kvec_len:		Number of elements in @kvec
-+ * @total_len:		Total number of bytes described in members of @kvec
-+ *
-+ * Kernel memory referenced by @kvec will be copied into @slice at offset @off.
-+ *
-+ * Return: the numbers of bytes copied, negative errno on failure.
-+ */
-+ssize_t kdbus_pool_slice_copy_kvec(const struct kdbus_pool_slice *slice,
-+				   loff_t off, struct kvec *kvec,
-+				   size_t kvec_len, size_t total_len)
-+{
-+	struct iov_iter iter;
-+	mm_segment_t old_fs;
-+	ssize_t len;
-+
-+	if (WARN_ON(off + total_len > slice->size))
-+		return -EFAULT;
-+
-+	off += slice->off;
-+	iov_iter_kvec(&iter, WRITE | ITER_KVEC, kvec, kvec_len, total_len);
-+
-+	old_fs = get_fs();
-+	set_fs(get_ds());
-+	len = vfs_iter_write(slice->pool->f, &iter, &off);
-+	set_fs(old_fs);
-+
-+	return (len >= 0 && len != total_len) ? -EFAULT : len;
-+}
-+
-+/**
-+ * kdbus_pool_slice_copy() - copy data from one slice into another
-+ * @slice_dst:		destination slice
-+ * @slice_src:		source slice
-+ *
-+ * Return: 0 on success, negative error number on failure.
-+ */
-+int kdbus_pool_slice_copy(const struct kdbus_pool_slice *slice_dst,
-+			  const struct kdbus_pool_slice *slice_src)
-+{
-+	struct file *f_src = slice_src->pool->f;
-+	struct file *f_dst = slice_dst->pool->f;
-+	struct inode *i_dst = file_inode(f_dst);
-+	struct address_space *mapping_dst = f_dst->f_mapping;
-+	const struct address_space_operations *aops = mapping_dst->a_ops;
-+	unsigned long len = slice_src->size;
-+	loff_t off_src = slice_src->off;
-+	loff_t off_dst = slice_dst->off;
-+	mm_segment_t old_fs;
-+	int ret = 0;
-+
-+	if (WARN_ON(slice_src->size != slice_dst->size) ||
-+	    WARN_ON(slice_src->free || slice_dst->free))
-+		return -EINVAL;
-+
-+	mutex_lock(&i_dst->i_mutex);
-+	old_fs = get_fs();
-+	set_fs(get_ds());
-+	while (len > 0) {
-+		unsigned long page_off;
-+		unsigned long copy_len;
-+		char __user *kaddr;
-+		struct page *page;
-+		ssize_t n_read;
-+		void *fsdata;
-+		long status;
-+
-+		page_off = off_dst & (PAGE_CACHE_SIZE - 1);
-+		copy_len = min_t(unsigned long,
-+				 PAGE_CACHE_SIZE - page_off, len);
-+
-+		status = aops->write_begin(f_dst, mapping_dst, off_dst,
-+					   copy_len, 0, &page, &fsdata);
-+		if (unlikely(status < 0)) {
-+			ret = status;
-+			break;
-+		}
-+
-+		kaddr = (char __force __user *)kmap(page) + page_off;
-+		n_read = __vfs_read(f_src, kaddr, copy_len, &off_src);
-+		kunmap(page);
-+		mark_page_accessed(page);
-+		flush_dcache_page(page);
-+
-+		if (unlikely(n_read != copy_len)) {
-+			ret = -EFAULT;
-+			break;
-+		}
-+
-+		status = aops->write_end(f_dst, mapping_dst, off_dst,
-+					 copy_len, copy_len, page, fsdata);
-+		if (unlikely(status != copy_len)) {
-+			ret = -EFAULT;
-+			break;
-+		}
-+
-+		off_dst += copy_len;
-+		len -= copy_len;
-+	}
-+	set_fs(old_fs);
-+	mutex_unlock(&i_dst->i_mutex);
-+
-+	return ret;
-+}
-+
-+/**
-+ * kdbus_pool_mmap() -  map the pool into the process
-+ * @pool:		The receiver's pool
-+ * @vma:		passed by mmap() syscall
-+ *
-+ * Return: the result of the mmap() call, negative errno on failure.
-+ */
-+int kdbus_pool_mmap(const struct kdbus_pool *pool, struct vm_area_struct *vma)
-+{
-+	/* deny write access to the pool */
-+	if (vma->vm_flags & VM_WRITE)
-+		return -EPERM;
-+	vma->vm_flags &= ~VM_MAYWRITE;
-+
-+	/* do not allow to map more than the size of the file */
-+	if ((vma->vm_end - vma->vm_start) > pool->size)
-+		return -EFAULT;
-+
-+	/* replace the connection file with our shmem file */
-+	if (vma->vm_file)
-+		fput(vma->vm_file);
-+	vma->vm_file = get_file(pool->f);
-+
-+	return pool->f->f_op->mmap(pool->f, vma);
-+}
-diff --git a/ipc/kdbus/pool.h b/ipc/kdbus/pool.h
-new file mode 100644
-index 0000000..a903821
---- /dev/null
-+++ b/ipc/kdbus/pool.h
-@@ -0,0 +1,46 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ * Copyright (C) 2014-2015 Djalal Harouni <tixxdz@××××××.org>
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#ifndef __KDBUS_POOL_H
-+#define __KDBUS_POOL_H
-+
-+#include <linux/uio.h>
-+
-+struct kdbus_pool;
-+struct kdbus_pool_slice;
-+
-+struct kdbus_pool *kdbus_pool_new(const char *name, size_t size);
-+void kdbus_pool_free(struct kdbus_pool *pool);
-+void kdbus_pool_accounted(struct kdbus_pool *pool, size_t *size, size_t *acc);
-+int kdbus_pool_mmap(const struct kdbus_pool *pool, struct vm_area_struct *vma);
-+int kdbus_pool_release_offset(struct kdbus_pool *pool, size_t off);
-+void kdbus_pool_publish_empty(struct kdbus_pool *pool, u64 *off, u64 *size);
-+
-+struct kdbus_pool_slice *kdbus_pool_slice_alloc(struct kdbus_pool *pool,
-+						size_t size, bool accounted);
-+void kdbus_pool_slice_release(struct kdbus_pool_slice *slice);
-+void kdbus_pool_slice_publish(struct kdbus_pool_slice *slice,
-+			      u64 *out_offset, u64 *out_size);
-+off_t kdbus_pool_slice_offset(const struct kdbus_pool_slice *slice);
-+size_t kdbus_pool_slice_size(const struct kdbus_pool_slice *slice);
-+int kdbus_pool_slice_copy(const struct kdbus_pool_slice *slice_dst,
-+			  const struct kdbus_pool_slice *slice_src);
-+ssize_t kdbus_pool_slice_copy_kvec(const struct kdbus_pool_slice *slice,
-+				   loff_t off, struct kvec *kvec,
-+				   size_t kvec_count, size_t total_len);
-+ssize_t kdbus_pool_slice_copy_iovec(const struct kdbus_pool_slice *slice,
-+				    loff_t off, struct iovec *iov,
-+				    size_t iov_count, size_t total_len);
-+
-+#endif
-diff --git a/ipc/kdbus/queue.c b/ipc/kdbus/queue.c
-new file mode 100644
-index 0000000..f9c44d7
---- /dev/null
-+++ b/ipc/kdbus/queue.c
-@@ -0,0 +1,363 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ * Copyright (C) 2014-2015 Djalal Harouni <tixxdz@××××××.org>
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#include <linux/audit.h>
-+#include <linux/file.h>
-+#include <linux/fs.h>
-+#include <linux/hashtable.h>
-+#include <linux/idr.h>
-+#include <linux/init.h>
-+#include <linux/math64.h>
-+#include <linux/mm.h>
-+#include <linux/module.h>
-+#include <linux/mutex.h>
-+#include <linux/poll.h>
-+#include <linux/sched.h>
-+#include <linux/sizes.h>
-+#include <linux/slab.h>
-+#include <linux/syscalls.h>
-+#include <linux/uio.h>
-+
-+#include "util.h"
-+#include "domain.h"
-+#include "connection.h"
-+#include "item.h"
-+#include "message.h"
-+#include "metadata.h"
-+#include "queue.h"
-+#include "reply.h"
-+
-+/**
-+ * kdbus_queue_init() - initialize data structure related to a queue
-+ * @queue:	The queue to initialize
-+ */
-+void kdbus_queue_init(struct kdbus_queue *queue)
-+{
-+	INIT_LIST_HEAD(&queue->msg_list);
-+	queue->msg_prio_queue = RB_ROOT;
-+}
-+
-+/**
-+ * kdbus_queue_peek() - Retrieves an entry from a queue
-+ * @queue:		The queue
-+ * @priority:		The minimum priority of the entry to peek
-+ * @use_priority:	Boolean flag whether or not to peek by priority
-+ *
-+ * Look for a entry in a queue, either by priority, or the oldest one (FIFO).
-+ * The entry is not freed, put off the queue's lists or anything else.
-+ *
-+ * Return: the peeked queue entry on success, NULL if no suitable msg is found
-+ */
-+struct kdbus_queue_entry *kdbus_queue_peek(struct kdbus_queue *queue,
-+					   s64 priority, bool use_priority)
-+{
-+	struct kdbus_queue_entry *e;
-+
-+	if (list_empty(&queue->msg_list))
-+		return NULL;
-+
-+	if (use_priority) {
-+		/* get next entry with highest priority */
-+		e = rb_entry(queue->msg_prio_highest,
-+			     struct kdbus_queue_entry, prio_node);
-+
-+		/* no entry with the requested priority */
-+		if (e->priority > priority)
-+			return NULL;
-+	} else {
-+		/* ignore the priority, return the next entry in the entry */
-+		e = list_first_entry(&queue->msg_list,
-+				     struct kdbus_queue_entry, entry);
-+	}
-+
-+	return e;
-+}
-+
-+static void kdbus_queue_entry_link(struct kdbus_queue_entry *entry)
-+{
-+	struct kdbus_queue *queue = &entry->conn->queue;
-+	struct rb_node **n, *pn = NULL;
-+	bool highest = true;
-+
-+	lockdep_assert_held(&entry->conn->lock);
-+	if (WARN_ON(!list_empty(&entry->entry)))
-+		return;
-+
-+	/* sort into priority entry tree */
-+	n = &queue->msg_prio_queue.rb_node;
-+	while (*n) {
-+		struct kdbus_queue_entry *e;
-+
-+		pn = *n;
-+		e = rb_entry(pn, struct kdbus_queue_entry, prio_node);
-+
-+		/* existing node for this priority, add to its list */
-+		if (likely(entry->priority == e->priority)) {
-+			list_add_tail(&entry->prio_entry, &e->prio_entry);
-+			goto prio_done;
-+		}
-+
-+		if (entry->priority < e->priority) {
-+			n = &pn->rb_left;
-+		} else {
-+			n = &pn->rb_right;
-+			highest = false;
-+		}
-+	}
-+
-+	/* cache highest-priority entry */
-+	if (highest)
-+		queue->msg_prio_highest = &entry->prio_node;
-+
-+	/* new node for this priority */
-+	rb_link_node(&entry->prio_node, pn, n);
-+	rb_insert_color(&entry->prio_node, &queue->msg_prio_queue);
-+	INIT_LIST_HEAD(&entry->prio_entry);
-+
-+prio_done:
-+	/* add to unsorted fifo list */
-+	list_add_tail(&entry->entry, &queue->msg_list);
-+}
-+
-+static void kdbus_queue_entry_unlink(struct kdbus_queue_entry *entry)
-+{
-+	struct kdbus_queue *queue = &entry->conn->queue;
-+
-+	lockdep_assert_held(&entry->conn->lock);
-+	if (list_empty(&entry->entry))
-+		return;
-+
-+	list_del_init(&entry->entry);
-+
-+	if (list_empty(&entry->prio_entry)) {
-+		/*
-+		 * Single entry for this priority, update cached
-+		 * highest-priority entry, remove the tree node.
-+		 */
-+		if (queue->msg_prio_highest == &entry->prio_node)
-+			queue->msg_prio_highest = rb_next(&entry->prio_node);
-+
-+		rb_erase(&entry->prio_node, &queue->msg_prio_queue);
-+	} else {
-+		struct kdbus_queue_entry *q;
-+
-+		/*
-+		 * Multiple entries for this priority entry, get next one in
-+		 * the list. Update cached highest-priority entry, store the
-+		 * new one as the tree node.
-+		 */
-+		q = list_first_entry(&entry->prio_entry,
-+				     struct kdbus_queue_entry, prio_entry);
-+		list_del(&entry->prio_entry);
-+
-+		if (queue->msg_prio_highest == &entry->prio_node)
-+			queue->msg_prio_highest = &q->prio_node;
-+
-+		rb_replace_node(&entry->prio_node, &q->prio_node,
-+				&queue->msg_prio_queue);
-+	}
-+}
-+
-+/**
-+ * kdbus_queue_entry_new() - allocate a queue entry
-+ * @src:	source connection, or NULL
-+ * @dst:	destination connection
-+ * @s:		staging object carrying the message
-+ *
-+ * Allocates a queue entry based on a given msg and allocate space for
-+ * the message payload and the requested metadata in the connection's pool.
-+ * The entry is not actually added to the queue's lists at this point.
-+ *
-+ * Return: the allocated entry on success, or an ERR_PTR on failures.
-+ */
-+struct kdbus_queue_entry *kdbus_queue_entry_new(struct kdbus_conn *src,
-+						struct kdbus_conn *dst,
-+						struct kdbus_staging *s)
-+{
-+	struct kdbus_queue_entry *entry;
-+	int ret;
-+
-+	entry = kzalloc(sizeof(*entry), GFP_KERNEL);
-+	if (!entry)
-+		return ERR_PTR(-ENOMEM);
-+
-+	INIT_LIST_HEAD(&entry->entry);
-+	entry->priority = s->msg->priority;
-+	entry->conn = kdbus_conn_ref(dst);
-+	entry->gaps = kdbus_gaps_ref(s->gaps);
-+
-+	entry->slice = kdbus_staging_emit(s, src, dst);
-+	if (IS_ERR(entry->slice)) {
-+		ret = PTR_ERR(entry->slice);
-+		entry->slice = NULL;
-+		goto error;
-+	}
-+
-+	entry->user = src ? kdbus_user_ref(src->user) : NULL;
-+	return entry;
-+
-+error:
-+	kdbus_queue_entry_free(entry);
-+	return ERR_PTR(ret);
-+}
-+
-+/**
-+ * kdbus_queue_entry_free() - free resources of an entry
-+ * @entry:	The entry to free
-+ *
-+ * Removes resources allocated by a queue entry, along with the entry itself.
-+ * Note that the entry's slice is not freed at this point.
-+ */
-+void kdbus_queue_entry_free(struct kdbus_queue_entry *entry)
-+{
-+	if (!entry)
-+		return;
-+
-+	lockdep_assert_held(&entry->conn->lock);
-+
-+	kdbus_queue_entry_unlink(entry);
-+	kdbus_reply_unref(entry->reply);
-+
-+	if (entry->slice) {
-+		kdbus_conn_quota_dec(entry->conn, entry->user,
-+				     kdbus_pool_slice_size(entry->slice),
-+				     entry->gaps ? entry->gaps->n_fds : 0);
-+		kdbus_pool_slice_release(entry->slice);
-+	}
-+
-+	kdbus_user_unref(entry->user);
-+	kdbus_gaps_unref(entry->gaps);
-+	kdbus_conn_unref(entry->conn);
-+	kfree(entry);
-+}
-+
-+/**
-+ * kdbus_queue_entry_install() - install message components into the
-+ *				 receiver's process
-+ * @entry:		The queue entry to install
-+ * @return_flags:	Pointer to store the return flags for userspace
-+ * @install_fds:	Whether or not to install associated file descriptors
-+ *
-+ * Return: 0 on success.
-+ */
-+int kdbus_queue_entry_install(struct kdbus_queue_entry *entry,
-+			      u64 *return_flags, bool install_fds)
-+{
-+	bool incomplete_fds = false;
-+	int ret;
-+
-+	lockdep_assert_held(&entry->conn->lock);
-+
-+	ret = kdbus_gaps_install(entry->gaps, entry->slice, &incomplete_fds);
-+	if (ret < 0)
-+		return ret;
-+
-+	if (incomplete_fds)
-+		*return_flags |= KDBUS_RECV_RETURN_INCOMPLETE_FDS;
-+	return 0;
-+}
-+
-+/**
-+ * kdbus_queue_entry_enqueue() - enqueue an entry
-+ * @entry:		entry to enqueue
-+ * @reply:		reply to link to this entry (or NULL if none)
-+ *
-+ * This enqueues an unqueued entry into the message queue of the linked
-+ * connection. It also binds a reply object to the entry so we can remember it
-+ * when the message is moved.
-+ *
-+ * Once this call returns (and the connection lock is released), this entry can
-+ * be dequeued by the target connection. Note that the entry will not be removed
-+ * from the queue until it is destroyed.
-+ */
-+void kdbus_queue_entry_enqueue(struct kdbus_queue_entry *entry,
-+			       struct kdbus_reply *reply)
-+{
-+	lockdep_assert_held(&entry->conn->lock);
-+
-+	if (WARN_ON(entry->reply) || WARN_ON(!list_empty(&entry->entry)))
-+		return;
-+
-+	entry->reply = kdbus_reply_ref(reply);
-+	kdbus_queue_entry_link(entry);
-+}
-+
-+/**
-+ * kdbus_queue_entry_move() - move queue entry
-+ * @e:		queue entry to move
-+ * @dst:	destination connection to queue the entry on
-+ *
-+ * This moves a queue entry onto a different connection. It allocates a new
-+ * slice on the target connection and copies the message over. If the copy
-+ * succeeded, we move the entry from @src to @dst.
-+ *
-+ * On failure, the entry is left untouched.
-+ *
-+ * The queue entry must be queued right now, and after the call succeeds it will
-+ * be queued on the destination, but no longer on the source.
-+ *
-+ * The caller must hold the connection lock of the source *and* destination.
-+ *
-+ * Return: 0 on success, negative error code on failure.
-+ */
-+int kdbus_queue_entry_move(struct kdbus_queue_entry *e,
-+			   struct kdbus_conn *dst)
-+{
-+	struct kdbus_pool_slice *slice = NULL;
-+	struct kdbus_conn *src = e->conn;
-+	size_t size, fds;
-+	int ret;
-+
-+	lockdep_assert_held(&src->lock);
-+	lockdep_assert_held(&dst->lock);
-+
-+	if (WARN_ON(list_empty(&e->entry)))
-+		return -EINVAL;
-+	if (src == dst)
-+		return 0;
-+
-+	size = kdbus_pool_slice_size(e->slice);
-+	fds = e->gaps ? e->gaps->n_fds : 0;
-+
-+	ret = kdbus_conn_quota_inc(dst, e->user, size, fds);
-+	if (ret < 0)
-+		return ret;
-+
-+	slice = kdbus_pool_slice_alloc(dst->pool, size, true);
-+	if (IS_ERR(slice)) {
-+		ret = PTR_ERR(slice);
-+		slice = NULL;
-+		goto error;
-+	}
-+
-+	ret = kdbus_pool_slice_copy(slice, e->slice);
-+	if (ret < 0)
-+		goto error;
-+
-+	kdbus_queue_entry_unlink(e);
-+	kdbus_conn_quota_dec(src, e->user, size, fds);
-+	kdbus_pool_slice_release(e->slice);
-+	kdbus_conn_unref(e->conn);
-+
-+	e->slice = slice;
-+	e->conn = kdbus_conn_ref(dst);
-+	kdbus_queue_entry_link(e);
-+
-+	return 0;
-+
-+error:
-+	kdbus_pool_slice_release(slice);
-+	kdbus_conn_quota_dec(dst, e->user, size, fds);
-+	return ret;
-+}
-diff --git a/ipc/kdbus/queue.h b/ipc/kdbus/queue.h
-new file mode 100644
-index 0000000..bf686d1
---- /dev/null
-+++ b/ipc/kdbus/queue.h
-@@ -0,0 +1,84 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ * Copyright (C) 2014-2015 Djalal Harouni <tixxdz@××××××.org>
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#ifndef __KDBUS_QUEUE_H
-+#define __KDBUS_QUEUE_H
-+
-+#include <linux/list.h>
-+#include <linux/rbtree.h>
-+
-+struct kdbus_conn;
-+struct kdbus_pool_slice;
-+struct kdbus_reply;
-+struct kdbus_staging;
-+struct kdbus_user;
-+
-+/**
-+ * struct kdbus_queue - a connection's message queue
-+ * @msg_list:		List head for kdbus_queue_entry objects
-+ * @msg_prio_queue:	RB tree root for messages, sorted by priority
-+ * @msg_prio_highest:	Link to the RB node referencing the message with the
-+ *			highest priority in the tree.
-+ */
-+struct kdbus_queue {
-+	struct list_head msg_list;
-+	struct rb_root msg_prio_queue;
-+	struct rb_node *msg_prio_highest;
-+};
-+
-+/**
-+ * struct kdbus_queue_entry - messages waiting to be read
-+ * @entry:		Entry in the connection's list
-+ * @prio_node:		Entry in the priority queue tree
-+ * @prio_entry:		Queue tree node entry in the list of one priority
-+ * @priority:		Message priority
-+ * @dst_name_id:	The sequence number of the name this message is
-+ *			addressed to, 0 for messages sent to an ID
-+ * @conn:		Connection this entry is queued on
-+ * @gaps:		Gaps object to fill message gaps at RECV time
-+ * @user:		User used for accounting
-+ * @slice:		Slice in the receiver's pool for the message
-+ * @reply:		The reply block if a reply to this message is expected
-+ */
-+struct kdbus_queue_entry {
-+	struct list_head entry;
-+	struct rb_node prio_node;
-+	struct list_head prio_entry;
-+
-+	s64 priority;
-+	u64 dst_name_id;
-+
-+	struct kdbus_conn *conn;
-+	struct kdbus_gaps *gaps;
-+	struct kdbus_user *user;
-+	struct kdbus_pool_slice *slice;
-+	struct kdbus_reply *reply;
-+};
-+
-+void kdbus_queue_init(struct kdbus_queue *queue);
-+struct kdbus_queue_entry *kdbus_queue_peek(struct kdbus_queue *queue,
-+					   s64 priority, bool use_priority);
-+
-+struct kdbus_queue_entry *kdbus_queue_entry_new(struct kdbus_conn *src,
-+						struct kdbus_conn *dst,
-+						struct kdbus_staging *s);
-+void kdbus_queue_entry_free(struct kdbus_queue_entry *entry);
-+int kdbus_queue_entry_install(struct kdbus_queue_entry *entry,
-+			      u64 *return_flags, bool install_fds);
-+void kdbus_queue_entry_enqueue(struct kdbus_queue_entry *entry,
-+			       struct kdbus_reply *reply);
-+int kdbus_queue_entry_move(struct kdbus_queue_entry *entry,
-+			   struct kdbus_conn *dst);
-+
-+#endif /* __KDBUS_QUEUE_H */
-diff --git a/ipc/kdbus/reply.c b/ipc/kdbus/reply.c
-new file mode 100644
-index 0000000..e6791d8
---- /dev/null
-+++ b/ipc/kdbus/reply.c
-@@ -0,0 +1,252 @@
-+#include <linux/init.h>
-+#include <linux/mm.h>
-+#include <linux/module.h>
-+#include <linux/mutex.h>
-+#include <linux/slab.h>
-+#include <linux/uio.h>
-+
-+#include "bus.h"
-+#include "connection.h"
-+#include "endpoint.h"
-+#include "message.h"
-+#include "metadata.h"
-+#include "names.h"
-+#include "domain.h"
-+#include "item.h"
-+#include "notify.h"
-+#include "policy.h"
-+#include "reply.h"
-+#include "util.h"
-+
-+/**
-+ * kdbus_reply_new() - Allocate and set up a new kdbus_reply object
-+ * @reply_src:		The connection a reply is expected from
-+ * @reply_dst:		The connection this reply object belongs to
-+ * @msg:		Message associated with the reply
-+ * @name_entry:		Name entry used to send the message
-+ * @sync:		Whether or not to make this reply synchronous
-+ *
-+ * Allocate and fill a new kdbus_reply object.
-+ *
-+ * Return: New kdbus_conn object on success, ERR_PTR on error.
-+ */
-+struct kdbus_reply *kdbus_reply_new(struct kdbus_conn *reply_src,
-+				    struct kdbus_conn *reply_dst,
-+				    const struct kdbus_msg *msg,
-+				    struct kdbus_name_entry *name_entry,
-+				    bool sync)
-+{
-+	struct kdbus_reply *r;
-+	int ret;
-+
-+	if (atomic_inc_return(&reply_dst->request_count) >
-+	    KDBUS_CONN_MAX_REQUESTS_PENDING) {
-+		ret = -EMLINK;
-+		goto exit_dec_request_count;
-+	}
-+
-+	r = kzalloc(sizeof(*r), GFP_KERNEL);
-+	if (!r) {
-+		ret = -ENOMEM;
-+		goto exit_dec_request_count;
-+	}
-+
-+	kref_init(&r->kref);
-+	INIT_LIST_HEAD(&r->entry);
-+	r->reply_src = kdbus_conn_ref(reply_src);
-+	r->reply_dst = kdbus_conn_ref(reply_dst);
-+	r->cookie = msg->cookie;
-+	r->name_id = name_entry ? name_entry->name_id : 0;
-+	r->deadline_ns = msg->timeout_ns;
-+
-+	if (sync) {
-+		r->sync = true;
-+		r->waiting = true;
-+	}
-+
-+	return r;
-+
-+exit_dec_request_count:
-+	atomic_dec(&reply_dst->request_count);
-+	return ERR_PTR(ret);
-+}
-+
-+static void __kdbus_reply_free(struct kref *kref)
-+{
-+	struct kdbus_reply *reply =
-+		container_of(kref, struct kdbus_reply, kref);
-+
-+	atomic_dec(&reply->reply_dst->request_count);
-+	kdbus_conn_unref(reply->reply_src);
-+	kdbus_conn_unref(reply->reply_dst);
-+	kfree(reply);
-+}
-+
-+/**
-+ * kdbus_reply_ref() - Increase reference on kdbus_reply
-+ * @r:		The reply, may be %NULL
-+ *
-+ * Return: The reply object with an extra reference
-+ */
-+struct kdbus_reply *kdbus_reply_ref(struct kdbus_reply *r)
-+{
-+	if (r)
-+		kref_get(&r->kref);
-+	return r;
-+}
-+
-+/**
-+ * kdbus_reply_unref() - Decrease reference on kdbus_reply
-+ * @r:		The reply, may be %NULL
-+ *
-+ * Return: NULL
-+ */
-+struct kdbus_reply *kdbus_reply_unref(struct kdbus_reply *r)
-+{
-+	if (r)
-+		kref_put(&r->kref, __kdbus_reply_free);
-+	return NULL;
-+}
-+
-+/**
-+ * kdbus_reply_link() - Link reply object into target connection
-+ * @r:		Reply to link
-+ */
-+void kdbus_reply_link(struct kdbus_reply *r)
-+{
-+	if (WARN_ON(!list_empty(&r->entry)))
-+		return;
-+
-+	list_add(&r->entry, &r->reply_dst->reply_list);
-+	kdbus_reply_ref(r);
-+}
-+
-+/**
-+ * kdbus_reply_unlink() - Unlink reply object from target connection
-+ * @r:		Reply to unlink
-+ */
-+void kdbus_reply_unlink(struct kdbus_reply *r)
-+{
-+	if (!list_empty(&r->entry)) {
-+		list_del_init(&r->entry);
-+		kdbus_reply_unref(r);
-+	}
-+}
-+
-+/**
-+ * kdbus_sync_reply_wakeup() - Wake a synchronously blocking reply
-+ * @reply:	The reply object
-+ * @err:	Error code to set on the remote side
-+ *
-+ * Wake up remote peer (method origin) with the appropriate synchronous reply
-+ * code.
-+ */
-+void kdbus_sync_reply_wakeup(struct kdbus_reply *reply, int err)
-+{
-+	if (WARN_ON(!reply->sync))
-+		return;
-+
-+	reply->waiting = false;
-+	reply->err = err;
-+	wake_up_interruptible(&reply->reply_dst->wait);
-+}
-+
-+/**
-+ * kdbus_reply_find() - Find the corresponding reply object
-+ * @replying:	The replying connection or NULL
-+ * @reply_dst:	The connection the reply will be sent to
-+ *		(method origin)
-+ * @cookie:	The cookie of the requesting message
-+ *
-+ * Lookup a reply object that should be sent as a reply by
-+ * @replying to @reply_dst with the given cookie.
-+ *
-+ * Callers must take the @reply_dst lock.
-+ *
-+ * Return: the corresponding reply object or NULL if not found
-+ */
-+struct kdbus_reply *kdbus_reply_find(struct kdbus_conn *replying,
-+				     struct kdbus_conn *reply_dst,
-+				     u64 cookie)
-+{
-+	struct kdbus_reply *r;
-+
-+	list_for_each_entry(r, &reply_dst->reply_list, entry) {
-+		if (r->cookie == cookie &&
-+		    (!replying || r->reply_src == replying))
-+			return r;
-+	}
-+
-+	return NULL;
-+}
-+
-+/**
-+ * kdbus_reply_list_scan_work() - Worker callback to scan the replies of a
-+ *				  connection for exceeded timeouts
-+ * @work:		Work struct of the connection to scan
-+ *
-+ * Walk the list of replies stored with a connection and look for entries
-+ * that have exceeded their timeout. If such an entry is found, a timeout
-+ * notification is sent to the waiting peer, and the reply is removed from
-+ * the list.
-+ *
-+ * The work is rescheduled to the nearest timeout found during the list
-+ * iteration.
-+ */
-+void kdbus_reply_list_scan_work(struct work_struct *work)
-+{
-+	struct kdbus_conn *conn =
-+		container_of(work, struct kdbus_conn, work.work);
-+	struct kdbus_reply *reply, *reply_tmp;
-+	u64 deadline = ~0ULL;
-+	u64 now;
-+
-+	now = ktime_get_ns();
-+
-+	mutex_lock(&conn->lock);
-+	if (!kdbus_conn_active(conn)) {
-+		mutex_unlock(&conn->lock);
-+		return;
-+	}
-+
-+	list_for_each_entry_safe(reply, reply_tmp, &conn->reply_list, entry) {
-+		/*
-+		 * If the reply block is waiting for synchronous I/O,
-+		 * the timeout is handled by wait_event_*_timeout(),
-+		 * so we don't have to care for it here.
-+		 */
-+		if (reply->sync && !reply->interrupted)
-+			continue;
-+
-+		WARN_ON(reply->reply_dst != conn);
-+
-+		if (reply->deadline_ns > now) {
-+			/* remember next timeout */
-+			if (deadline > reply->deadline_ns)
-+				deadline = reply->deadline_ns;
-+
-+			continue;
-+		}
-+
-+		/*
-+		 * A zero deadline means the connection died, was
-+		 * cleaned up already and the notification was sent.
-+		 * Don't send notifications for reply trackers that were
-+		 * left in an interrupted syscall state.
-+		 */
-+		if (reply->deadline_ns != 0 && !reply->interrupted)
-+			kdbus_notify_reply_timeout(conn->ep->bus, conn->id,
-+						   reply->cookie);
-+
-+		kdbus_reply_unlink(reply);
-+	}
-+
-+	/* rearm delayed work with next timeout */
-+	if (deadline != ~0ULL)
-+		schedule_delayed_work(&conn->work,
-+				      nsecs_to_jiffies(deadline - now));
-+
-+	mutex_unlock(&conn->lock);
-+
-+	kdbus_notify_flush(conn->ep->bus);
-+}
-diff --git a/ipc/kdbus/reply.h b/ipc/kdbus/reply.h
-new file mode 100644
-index 0000000..68d5232
---- /dev/null
-+++ b/ipc/kdbus/reply.h
-@@ -0,0 +1,68 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ * Copyright (C) 2014-2015 Djalal Harouni <tixxdz@××××××.org>
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#ifndef __KDBUS_REPLY_H
-+#define __KDBUS_REPLY_H
-+
-+/**
-+ * struct kdbus_reply - an entry of kdbus_conn's list of replies
-+ * @kref:		Ref-count of this object
-+ * @entry:		The entry of the connection's reply_list
-+ * @reply_src:		The connection the reply will be sent from
-+ * @reply_dst:		The connection the reply will be sent to
-+ * @queue_entry:	The queue entry item that is prepared by the replying
-+ *			connection
-+ * @deadline_ns:	The deadline of the reply, in nanoseconds
-+ * @cookie:		The cookie of the requesting message
-+ * @name_id:		ID of the well-known name the original msg was sent to
-+ * @sync:		The reply block is waiting for synchronous I/O
-+ * @waiting:		The condition to synchronously wait for
-+ * @interrupted:	The sync reply was left in an interrupted state
-+ * @err:		The error code for the synchronous reply
-+ */
-+struct kdbus_reply {
-+	struct kref kref;
-+	struct list_head entry;
-+	struct kdbus_conn *reply_src;
-+	struct kdbus_conn *reply_dst;
-+	struct kdbus_queue_entry *queue_entry;
-+	u64 deadline_ns;
-+	u64 cookie;
-+	u64 name_id;
-+	bool sync:1;
-+	bool waiting:1;
-+	bool interrupted:1;
-+	int err;
-+};
-+
-+struct kdbus_reply *kdbus_reply_new(struct kdbus_conn *reply_src,
-+				    struct kdbus_conn *reply_dst,
-+				    const struct kdbus_msg *msg,
-+				    struct kdbus_name_entry *name_entry,
-+				    bool sync);
-+
-+struct kdbus_reply *kdbus_reply_ref(struct kdbus_reply *r);
-+struct kdbus_reply *kdbus_reply_unref(struct kdbus_reply *r);
-+
-+void kdbus_reply_link(struct kdbus_reply *r);
-+void kdbus_reply_unlink(struct kdbus_reply *r);
-+
-+struct kdbus_reply *kdbus_reply_find(struct kdbus_conn *replying,
-+				     struct kdbus_conn *reply_dst,
-+				     u64 cookie);
-+
-+void kdbus_sync_reply_wakeup(struct kdbus_reply *reply, int err);
-+void kdbus_reply_list_scan_work(struct work_struct *work);
-+
-+#endif /* __KDBUS_REPLY_H */
-diff --git a/ipc/kdbus/util.c b/ipc/kdbus/util.c
-new file mode 100644
-index 0000000..72b1883
---- /dev/null
-+++ b/ipc/kdbus/util.c
-@@ -0,0 +1,156 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ * Copyright (C) 2014-2015 Djalal Harouni <tixxdz@××××××.org>
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#include <linux/capability.h>
-+#include <linux/cred.h>
-+#include <linux/ctype.h>
-+#include <linux/err.h>
-+#include <linux/file.h>
-+#include <linux/slab.h>
-+#include <linux/string.h>
-+#include <linux/uaccess.h>
-+#include <linux/uio.h>
-+#include <linux/user_namespace.h>
-+
-+#include "limits.h"
-+#include "util.h"
-+
-+/**
-+ * kdbus_copy_from_user() - copy aligned data from user-space
-+ * @dest:	target buffer in kernel memory
-+ * @user_ptr:	user-provided source buffer
-+ * @size:	memory size to copy from user
-+ *
-+ * This copies @size bytes from @user_ptr into the kernel, just like
-+ * copy_from_user() does. But we enforce an 8-byte alignment and reject any
-+ * unaligned user-space pointers.
-+ *
-+ * Return: 0 on success, negative error code on failure.
-+ */
-+int kdbus_copy_from_user(void *dest, void __user *user_ptr, size_t size)
-+{
-+	if (!KDBUS_IS_ALIGNED8((uintptr_t)user_ptr))
-+		return -EFAULT;
-+
-+	if (copy_from_user(dest, user_ptr, size))
-+		return -EFAULT;
-+
-+	return 0;
-+}
-+
-+/**
-+ * kdbus_verify_uid_prefix() - verify UID prefix of a user-supplied name
-+ * @name:	user-supplied name to verify
-+ * @user_ns:	user-namespace to act in
-+ * @kuid:	Kernel internal uid of user
-+ *
-+ * This verifies that the user-supplied name @name has their UID as prefix. This
-+ * is the default name-spacing policy we enforce on user-supplied names for
-+ * public kdbus entities like buses and endpoints.
-+ *
-+ * The user must supply names prefixed with "<UID>-", whereas the UID is
-+ * interpreted in the user-namespace of the domain. If the user fails to supply
-+ * such a prefixed name, we reject it.
-+ *
-+ * Return: 0 on success, negative error code on failure
-+ */
-+int kdbus_verify_uid_prefix(const char *name, struct user_namespace *user_ns,
-+			    kuid_t kuid)
-+{
-+	uid_t uid;
-+	char prefix[16];
-+
-+	/*
-+	 * The kuid must have a mapping into the userns of the domain
-+	 * otherwise do not allow creation of buses nor endpoints.
-+	 */
-+	uid = from_kuid(user_ns, kuid);
-+	if (uid == (uid_t) -1)
-+		return -EINVAL;
-+
-+	snprintf(prefix, sizeof(prefix), "%u-", uid);
-+	if (strncmp(name, prefix, strlen(prefix)) != 0)
-+		return -EINVAL;
-+
-+	return 0;
-+}
-+
-+/**
-+ * kdbus_sanitize_attach_flags() - Sanitize attach flags from user-space
-+ * @flags:		Attach flags provided by userspace
-+ * @attach_flags:	A pointer where to store the valid attach flags
-+ *
-+ * Convert attach-flags provided by user-space into a valid mask. If the mask
-+ * is invalid, an error is returned. The sanitized attach flags are stored in
-+ * the output parameter.
-+ *
-+ * Return: 0 on success, negative error on failure.
-+ */
-+int kdbus_sanitize_attach_flags(u64 flags, u64 *attach_flags)
-+{
-+	/* 'any' degrades to 'all' for compatibility */
-+	if (flags == _KDBUS_ATTACH_ANY)
-+		flags = _KDBUS_ATTACH_ALL;
-+
-+	/* reject unknown attach flags */
-+	if (flags & ~_KDBUS_ATTACH_ALL)
-+		return -EINVAL;
-+
-+	*attach_flags = flags;
-+	return 0;
-+}
-+
-+/**
-+ * kdbus_kvec_set - helper utility to assemble kvec arrays
-+ * @kvec:	kvec entry to use
-+ * @src:	Source address to set in @kvec
-+ * @len:	Number of bytes in @src
-+ * @total_len:	Pointer to total length variable
-+ *
-+ * Set @src and @len in @kvec, and increase @total_len by @len.
-+ */
-+void kdbus_kvec_set(struct kvec *kvec, void *src, size_t len, u64 *total_len)
-+{
-+	kvec->iov_base = src;
-+	kvec->iov_len = len;
-+	*total_len += len;
-+}
-+
-+static const char * const zeros = "\0\0\0\0\0\0\0";
-+
-+/**
-+ * kdbus_kvec_pad - conditionally write a padding kvec
-+ * @kvec:	kvec entry to use
-+ * @len:	Total length used for kvec array
-+ *
-+ * Check if the current total byte length of the array in @len is aligned to
-+ * 8 bytes. If it isn't, fill @kvec with padding information and increase @len
-+ * by the number of bytes stored in @kvec.
-+ *
-+ * Return: the number of added padding bytes.
-+ */
-+size_t kdbus_kvec_pad(struct kvec *kvec, u64 *len)
-+{
-+	size_t pad = KDBUS_ALIGN8(*len) - *len;
-+
-+	if (!pad)
-+		return 0;
-+
-+	kvec->iov_base = (void *)zeros;
-+	kvec->iov_len = pad;
-+
-+	*len += pad;
-+
-+	return pad;
-+}
-diff --git a/ipc/kdbus/util.h b/ipc/kdbus/util.h
-new file mode 100644
-index 0000000..5297166
---- /dev/null
-+++ b/ipc/kdbus/util.h
-@@ -0,0 +1,73 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@×××××××××××××××.org>
-+ * Copyright (C) 2013-2015 Daniel Mack <daniel@××××××.org>
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ * Copyright (C) 2013-2015 Linux Foundation
-+ * Copyright (C) 2014-2015 Djalal Harouni <tixxdz@××××××.org>
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#ifndef __KDBUS_UTIL_H
-+#define __KDBUS_UTIL_H
-+
-+#include <linux/dcache.h>
-+#include <linux/ioctl.h>
-+
-+#include <uapi/linux/kdbus.h>
-+
-+/* all exported addresses are 64 bit */
-+#define KDBUS_PTR(addr) ((void __user *)(uintptr_t)(addr))
-+
-+/* all exported sizes are 64 bit and data aligned to 64 bit */
-+#define KDBUS_ALIGN8(s) ALIGN((s), 8)
-+#define KDBUS_IS_ALIGNED8(s) (IS_ALIGNED(s, 8))
-+
-+/**
-+ * kdbus_member_set_user - write a structure member to user memory
-+ * @_s:		Variable to copy from
-+ * @_b:		Buffer to write to
-+ * @_t:		Structure type
-+ * @_m:		Member name in the passed structure
-+ *
-+ * Return: the result of copy_to_user()
-+ */
-+#define kdbus_member_set_user(_s, _b, _t, _m)				\
-+({									\
-+	u64 __user *_sz =						\
-+		(void __user *)((u8 __user *)(_b) + offsetof(_t, _m));	\
-+	copy_to_user(_sz, _s, FIELD_SIZEOF(_t, _m));			\
-+})
-+
-+/**
-+ * kdbus_strhash - calculate a hash
-+ * @str:	String
-+ *
-+ * Return: hash value
-+ */
-+static inline unsigned int kdbus_strhash(const char *str)
-+{
-+	unsigned long hash = init_name_hash();
-+
-+	while (*str)
-+		hash = partial_name_hash(*str++, hash);
-+
-+	return end_name_hash(hash);
-+}
-+
-+int kdbus_verify_uid_prefix(const char *name, struct user_namespace *user_ns,
-+			    kuid_t kuid);
-+int kdbus_sanitize_attach_flags(u64 flags, u64 *attach_flags);
-+
-+int kdbus_copy_from_user(void *dest, void __user *user_ptr, size_t size);
-+
-+struct kvec;
-+
-+void kdbus_kvec_set(struct kvec *kvec, void *src, size_t len, u64 *total_len);
-+size_t kdbus_kvec_pad(struct kvec *kvec, u64 *len);
-+
-+#endif
-diff --git a/samples/Kconfig b/samples/Kconfig
-index 224ebb4..a4c6b2f 100644
---- a/samples/Kconfig
-+++ b/samples/Kconfig
-@@ -55,6 +55,13 @@ config SAMPLE_KDB
- 	  Build an example of how to dynamically add the hello
- 	  command to the kdb shell.
- 
-+config SAMPLE_KDBUS
-+	bool "Build kdbus API example"
-+	depends on KDBUS
-+	help
-+	  Build an example of how the kdbus API can be used from
-+	  userspace.
-+
- config SAMPLE_RPMSG_CLIENT
- 	tristate "Build rpmsg client sample -- loadable modules only"
- 	depends on RPMSG && m
-diff --git a/samples/Makefile b/samples/Makefile
-index f00257b..f0ad51e 100644
---- a/samples/Makefile
-+++ b/samples/Makefile
-@@ -1,4 +1,5 @@
- # Makefile for Linux samples code
- 
- obj-$(CONFIG_SAMPLES)	+= kobject/ kprobes/ trace_events/ livepatch/ \
--			   hw_breakpoint/ kfifo/ kdb/ hidraw/ rpmsg/ seccomp/
-+			   hw_breakpoint/ kfifo/ kdb/ kdbus/ hidraw/ rpmsg/ \
-+			   seccomp/
-diff --git a/samples/kdbus/.gitignore b/samples/kdbus/.gitignore
-new file mode 100644
-index 0000000..ee07d98
---- /dev/null
-+++ b/samples/kdbus/.gitignore
-@@ -0,0 +1 @@
-+kdbus-workers
-diff --git a/samples/kdbus/Makefile b/samples/kdbus/Makefile
-new file mode 100644
-index 0000000..137f842
---- /dev/null
-+++ b/samples/kdbus/Makefile
-@@ -0,0 +1,9 @@
-+# kbuild trick to avoid linker error. Can be omitted if a module is built.
-+obj- := dummy.o
-+
-+hostprogs-$(CONFIG_SAMPLE_KDBUS) += kdbus-workers
-+
-+always := $(hostprogs-y)
-+
-+HOSTCFLAGS_kdbus-workers.o += -I$(objtree)/usr/include
-+HOSTLOADLIBES_kdbus-workers := -lrt
-diff --git a/samples/kdbus/kdbus-api.h b/samples/kdbus/kdbus-api.h
-new file mode 100644
-index 0000000..7f3abae
---- /dev/null
-+++ b/samples/kdbus/kdbus-api.h
-@@ -0,0 +1,114 @@
-+#ifndef KDBUS_API_H
-+#define KDBUS_API_H
-+
-+#include <sys/ioctl.h>
-+#include <linux/kdbus.h>
-+
-+#define KDBUS_ALIGN8(l) (((l) + 7) & ~7)
-+#define KDBUS_ITEM_HEADER_SIZE offsetof(struct kdbus_item, data)
-+#define KDBUS_ITEM_SIZE(s) KDBUS_ALIGN8((s) + KDBUS_ITEM_HEADER_SIZE)
-+#define KDBUS_ITEM_NEXT(item) \
-+	(typeof(item))((uint8_t *)(item) + KDBUS_ALIGN8((item)->size))
-+#define KDBUS_FOREACH(iter, first, _size)				\
-+	for ((iter) = (first);						\
-+	     ((uint8_t *)(iter) < (uint8_t *)(first) + (_size)) &&	\
-+	       ((uint8_t *)(iter) >= (uint8_t *)(first));		\
-+	     (iter) = (void *)((uint8_t *)(iter) + KDBUS_ALIGN8((iter)->size)))
-+
-+static inline int kdbus_cmd_bus_make(int control_fd, struct kdbus_cmd *cmd)
-+{
-+	int ret = ioctl(control_fd, KDBUS_CMD_BUS_MAKE, cmd);
-+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
-+}
-+
-+static inline int kdbus_cmd_endpoint_make(int bus_fd, struct kdbus_cmd *cmd)
-+{
-+	int ret = ioctl(bus_fd, KDBUS_CMD_ENDPOINT_MAKE, cmd);
-+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
-+}
-+
-+static inline int kdbus_cmd_endpoint_update(int ep_fd, struct kdbus_cmd *cmd)
-+{
-+	int ret = ioctl(ep_fd, KDBUS_CMD_ENDPOINT_UPDATE, cmd);
-+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
-+}
-+
-+static inline int kdbus_cmd_hello(int bus_fd, struct kdbus_cmd_hello *cmd)
-+{
-+	int ret = ioctl(bus_fd, KDBUS_CMD_HELLO, cmd);
-+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
-+}
-+
-+static inline int kdbus_cmd_update(int fd, struct kdbus_cmd *cmd)
-+{
-+	int ret = ioctl(fd, KDBUS_CMD_UPDATE, cmd);
-+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
-+}
-+
-+static inline int kdbus_cmd_byebye(int conn_fd, struct kdbus_cmd *cmd)
-+{
-+	int ret = ioctl(conn_fd, KDBUS_CMD_BYEBYE, cmd);
-+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
-+}
-+
-+static inline int kdbus_cmd_free(int conn_fd, struct kdbus_cmd_free *cmd)
-+{
-+	int ret = ioctl(conn_fd, KDBUS_CMD_FREE, cmd);
-+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
-+}
-+
-+static inline int kdbus_cmd_conn_info(int conn_fd, struct kdbus_cmd_info *cmd)
-+{
-+	int ret = ioctl(conn_fd, KDBUS_CMD_CONN_INFO, cmd);
-+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
-+}
-+
-+static inline int kdbus_cmd_bus_creator_info(int conn_fd, struct kdbus_cmd_info *cmd)
-+{
-+	int ret = ioctl(conn_fd, KDBUS_CMD_BUS_CREATOR_INFO, cmd);
-+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
-+}
-+
-+static inline int kdbus_cmd_list(int fd, struct kdbus_cmd_list *cmd)
-+{
-+	int ret = ioctl(fd, KDBUS_CMD_LIST, cmd);
-+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
-+}
-+
-+static inline int kdbus_cmd_send(int conn_fd, struct kdbus_cmd_send *cmd)
-+{
-+	int ret = ioctl(conn_fd, KDBUS_CMD_SEND, cmd);
-+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
-+}
-+
-+static inline int kdbus_cmd_recv(int conn_fd, struct kdbus_cmd_recv *cmd)
-+{
-+	int ret = ioctl(conn_fd, KDBUS_CMD_RECV, cmd);
-+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
-+}
-+
-+static inline int kdbus_cmd_name_acquire(int conn_fd, struct kdbus_cmd *cmd)
-+{
-+	int ret = ioctl(conn_fd, KDBUS_CMD_NAME_ACQUIRE, cmd);
-+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
-+}
-+
-+static inline int kdbus_cmd_name_release(int conn_fd, struct kdbus_cmd *cmd)
-+{
-+	int ret = ioctl(conn_fd, KDBUS_CMD_NAME_RELEASE, cmd);
-+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
-+}
-+
-+static inline int kdbus_cmd_match_add(int conn_fd, struct kdbus_cmd_match *cmd)
-+{
-+	int ret = ioctl(conn_fd, KDBUS_CMD_MATCH_ADD, cmd);
-+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
-+}
-+
-+static inline int kdbus_cmd_match_remove(int conn_fd, struct kdbus_cmd_match *cmd)
-+{
-+	int ret = ioctl(conn_fd, KDBUS_CMD_MATCH_REMOVE, cmd);
-+	return (ret < 0) ? (errno > 0 ? -errno : -EINVAL) : 0;
-+}
-+
-+#endif /* KDBUS_API_H */
-diff --git a/samples/kdbus/kdbus-workers.c b/samples/kdbus/kdbus-workers.c
-new file mode 100644
-index 0000000..5a6dfdc
---- /dev/null
-+++ b/samples/kdbus/kdbus-workers.c
-@@ -0,0 +1,1346 @@
-+/*
-+ * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@×××××.com>
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+/*
-+ * Example: Workers
-+ * This program computes prime-numbers based on the sieve of Eratosthenes. The
-+ * master sets up a shared memory region and spawns workers which clear out the
-+ * non-primes. The master reacts to keyboard input and to client-requests to
-+ * control what each worker does. Note that this is in no way meant as efficient
-+ * way to compute primes. It should only serve as example how a master/worker
-+ * concept can be implemented with kdbus used as control messages.
-+ *
-+ * The main process is called the 'master'. It creates a new, private bus which
-+ * will be used between the master and its workers to communicate. The master
-+ * then spawns a fixed number of workers. Whenever a worker dies (detected via
-+ * SIGCHLD), the master spawns a new worker. When done, the master waits for all
-+ * workers to exit, prints a status report and exits itself.
-+ *
-+ * The master process does *not* keep track of its workers. Instead, this
-+ * example implements a PULL model. That is, the master acquires a well-known
-+ * name on the bus which each worker uses to request tasks from the master. If
-+ * there are no more tasks, the master will return an empty task-list, which
-+ * casues a worker to exit immediately.
-+ *
-+ * As tasks can be computationally expensive, we support cancellation. Whenever
-+ * the master process is interrupted, it will drop its well-known name on the
-+ * bus. This causes kdbus to broadcast a name-change notification. The workers
-+ * check for broadcast messages regularly and will exit if they receive one.
-+ *
-+ * This example exists of 4 objects:
-+ *  * master: The master object contains the context of the master process. This
-+ *            process manages the prime-context, spawns workers and assigns
-+ *            prime-ranges to each worker to compute.
-+ *            The master itself does not do any prime-computations itself.
-+ *  * child:  The child object contains the context of a worker. It inherits the
-+ *            prime context from its parent (the master) and then creates a new
-+ *            bus context to request prime-ranges to compute.
-+ *  * prime:  The "prime" object is used to abstract how we compute primes. When
-+ *            allocated, it prepares a memory region to hold 1 bit for each
-+ *            natural number up to a fixed maximum ('MAX_PRIMES').
-+ *            The memory region is backed by a memfd which we share between
-+ *            processes. Each worker now gets assigned a range of natural
-+ *            numbers which it clears multiples of off the memory region. The
-+ *            master process is responsible of distributing all natural numbers
-+ *            up to the fixed maximum to its workers.
-+ *  * bus:    The bus object is an abstraction of the kdbus API. It is pretty
-+ *            straightfoward and only manages the connection-fd plus the
-+ *            memory-mapped pool in a single object.
-+ *
-+ * This example is in reversed order, which should make it easier to read
-+ * top-down, but requires some forward-declarations. Just ignore those.
-+ */
-+
-+#include <stdio.h>
-+#include <stdlib.h>
-+#include <sys/syscall.h>
-+
-+/* glibc < 2.7 does not ship sys/signalfd.h */
-+/* we require kernels with __NR_memfd_create */
-+#if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 7 && defined(__NR_memfd_create)
-+
-+#include <ctype.h>
-+#include <errno.h>
-+#include <fcntl.h>
-+#include <linux/memfd.h>
-+#include <signal.h>
-+#include <stdbool.h>
-+#include <stddef.h>
-+#include <stdint.h>
-+#include <string.h>
-+#include <sys/mman.h>
-+#include <sys/poll.h>
-+#include <sys/signalfd.h>
-+#include <sys/time.h>
-+#include <sys/wait.h>
-+#include <time.h>
-+#include <unistd.h>
-+#include "kdbus-api.h"
-+
-+/* FORWARD DECLARATIONS */
-+
-+#define POOL_SIZE (16 * 1024 * 1024)
-+#define MAX_PRIMES (2UL << 24)
-+#define WORKER_COUNT (16)
-+#define PRIME_STEPS (65536 * 4)
-+
-+static const char *arg_busname = "example-workers";
-+static const char *arg_modname = "kdbus";
-+static const char *arg_master = "org.freedesktop.master";
-+
-+static int err_assert(int r_errno, const char *msg, const char *func, int line,
-+		      const char *file)
-+{
-+	r_errno = (r_errno != 0) ? -abs(r_errno) : -EFAULT;
-+	if (r_errno < 0) {
-+		errno = -r_errno;
-+		fprintf(stderr, "ERR: %s: %m (%s:%d in %s)\n",
-+			msg, func, line, file);
-+	}
-+	return r_errno;
-+}
-+
-+#define err_r(_r, _msg) err_assert((_r), (_msg), __func__, __LINE__, __FILE__)
-+#define err(_msg) err_r(errno, (_msg))
-+
-+struct prime;
-+struct bus;
-+struct master;
-+struct child;
-+
-+struct prime {
-+	int fd;
-+	uint8_t *area;
-+	size_t max;
-+	size_t done;
-+	size_t status;
-+};
-+
-+static int prime_new(struct prime **out);
-+static void prime_free(struct prime *p);
-+static bool prime_done(struct prime *p);
-+static void prime_consume(struct prime *p, size_t amount);
-+static int prime_run(struct prime *p, struct bus *cancel, size_t number);
-+static void prime_print(struct prime *p);
-+
-+struct bus {
-+	int fd;
-+	uint8_t *pool;
-+};
-+
-+static int bus_open_connection(struct bus **out, uid_t uid, const char *name,
-+			       uint64_t recv_flags);
-+static void bus_close_connection(struct bus *b);
-+static void bus_poool_free_slice(struct bus *b, uint64_t offset);
-+static int bus_acquire_name(struct bus *b, const char *name);
-+static int bus_install_name_loss_match(struct bus *b, const char *name);
-+static int bus_poll(struct bus *b);
-+static int bus_make(uid_t uid, const char *name);
-+
-+struct master {
-+	size_t n_workers;
-+	size_t max_workers;
-+
-+	int signal_fd;
-+	int control_fd;
-+
-+	struct prime *prime;
-+	struct bus *bus;
-+};
-+
-+static int master_new(struct master **out);
-+static void master_free(struct master *m);
-+static int master_run(struct master *m);
-+static int master_poll(struct master *m);
-+static int master_handle_stdin(struct master *m);
-+static int master_handle_signal(struct master *m);
-+static int master_handle_bus(struct master *m);
-+static int master_reply(struct master *m, const struct kdbus_msg *msg);
-+static int master_waitpid(struct master *m);
-+static int master_spawn(struct master *m);
-+
-+struct child {
-+	struct bus *bus;
-+	struct prime *prime;
-+};
-+
-+static int child_new(struct child **out, struct prime *p);
-+static void child_free(struct child *c);
-+static int child_run(struct child *c);
-+
-+/* END OF FORWARD DECLARATIONS */
-+
-+/*
-+ * This is the main entrypoint of this example. It is pretty straightforward. We
-+ * create a master object, run the computation, print a status report and then
-+ * exit. Nothing particularly interesting here, so lets look into the master
-+ * object...
-+ */
-+int main(int argc, char **argv)
-+{
-+	struct master *m = NULL;
-+	int r;
-+
-+	r = master_new(&m);
-+	if (r < 0)
-+		goto out;
-+
-+	r = master_run(m);
-+	if (r < 0)
-+		goto out;
-+
-+	if (0)
-+		prime_print(m->prime);
-+
-+out:
-+	master_free(m);
-+	if (r < 0 && r != -EINTR)
-+		fprintf(stderr, "failed\n");
-+	else
-+		fprintf(stderr, "done\n");
-+	return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
-+}
-+
-+/*
-+ * ...this will allocate a new master context. It keeps track of the current
-+ * number of children/workers that are running, manages a signalfd to track
-+ * SIGCHLD, and creates a private kdbus bus. Afterwards, it opens its connection
-+ * to the bus and acquires a well known-name (arg_master).
-+ */
-+static int master_new(struct master **out)
-+{
-+	struct master *m;
-+	sigset_t smask;
-+	int r;
-+
-+	m = calloc(1, sizeof(*m));
-+	if (!m)
-+		return err("cannot allocate master");
-+
-+	m->max_workers = WORKER_COUNT;
-+	m->signal_fd = -1;
-+	m->control_fd = -1;
-+
-+	/* Block SIGINT and SIGCHLD signals */
-+	sigemptyset(&smask);
-+	sigaddset(&smask, SIGINT);
-+	sigaddset(&smask, SIGCHLD);
-+	sigprocmask(SIG_BLOCK, &smask, NULL);
-+
-+	m->signal_fd = signalfd(-1, &smask, SFD_CLOEXEC);
-+	if (m->signal_fd < 0) {
-+		r = err("cannot create signalfd");
-+		goto error;
-+	}
-+
-+	r = prime_new(&m->prime);
-+	if (r < 0)
-+		goto error;
-+
-+	m->control_fd = bus_make(getuid(), arg_busname);
-+	if (m->control_fd < 0) {
-+		r = m->control_fd;
-+		goto error;
-+	}
-+
-+	/*
-+	 * Open a bus connection for the master, and require each received
-+	 * message to have a metadata item of type KDBUS_ITEM_PIDS attached.
-+	 * The current UID is needed to compute the name of the bus node to
-+	 * connect to.
-+	 */
-+	r = bus_open_connection(&m->bus, getuid(),
-+				arg_busname, KDBUS_ATTACH_PIDS);
-+	if (r < 0)
-+		goto error;
-+
-+	/*
-+	 * Acquire a well-known name on the bus, so children can address
-+	 * messages to the master using KDBUS_DST_ID_NAME as destination-ID
-+	 * of messages.
-+	 */
-+	r = bus_acquire_name(m->bus, arg_master);
-+	if (r < 0)
-+		goto error;
-+
-+	*out = m;
-+	return 0;
-+
-+error:
-+	master_free(m);
-+	return r;
-+}
-+
-+/* pretty straightforward destructor of a master object */
-+static void master_free(struct master *m)
-+{
-+	if (!m)
-+		return;
-+
-+	bus_close_connection(m->bus);
-+	if (m->control_fd >= 0)
-+		close(m->control_fd);
-+	prime_free(m->prime);
-+	if (m->signal_fd >= 0)
-+		close(m->signal_fd);
-+	free(m);
-+}
-+
-+static int master_run(struct master *m)
-+{
-+	int res, r = 0;
-+
-+	while (!prime_done(m->prime)) {
-+		while (m->n_workers < m->max_workers) {
-+			r = master_spawn(m);
-+			if (r < 0)
-+				break;
-+		}
-+
-+		r = master_poll(m);
-+		if (r < 0)
-+			break;
-+	}
-+
-+	if (r < 0) {
-+		bus_close_connection(m->bus);
-+		m->bus = NULL;
-+	}
-+
-+	while (m->n_workers > 0) {
-+		res = master_poll(m);
-+		if (res < 0) {
-+			if (m->bus) {
-+				bus_close_connection(m->bus);
-+				m->bus = NULL;
-+			}
-+			r = res;
-+		}
-+	}
-+
-+	return r == -EINTR ? 0 : r;
-+}
-+
-+static int master_poll(struct master *m)
-+{
-+	struct pollfd fds[3] = {};
-+	int r = 0, n = 0;
-+
-+	/*
-+	 * Add stdin, the eventfd and the connection owner file descriptor to
-+	 * the pollfd table, and handle incoming traffic on the latter in
-+	 * master_handle_bus().
-+	 */
-+	fds[n].fd = STDIN_FILENO;
-+	fds[n++].events = POLLIN;
-+	fds[n].fd = m->signal_fd;
-+	fds[n++].events = POLLIN;
-+	if (m->bus) {
-+		fds[n].fd = m->bus->fd;
-+		fds[n++].events = POLLIN;
-+	}
-+
-+	r = poll(fds, n, -1);
-+	if (r < 0)
-+		return err("poll() failed");
-+
-+	if (fds[0].revents & POLLIN)
-+		r = master_handle_stdin(m);
-+	else if (fds[0].revents)
-+		r = err("ERR/HUP on stdin");
-+	if (r < 0)
-+		return r;
-+
-+	if (fds[1].revents & POLLIN)
-+		r = master_handle_signal(m);
-+	else if (fds[1].revents)
-+		r = err("ERR/HUP on signalfd");
-+	if (r < 0)
-+		return r;
-+
-+	if (fds[2].revents & POLLIN)
-+		r = master_handle_bus(m);
-+	else if (fds[2].revents)
-+		r = err("ERR/HUP on bus");
-+
-+	return r;
-+}
-+
-+static int master_handle_stdin(struct master *m)
-+{
-+	char buf[128];
-+	ssize_t l;
-+	int r = 0;
-+
-+	l = read(STDIN_FILENO, buf, sizeof(buf));
-+	if (l < 0)
-+		return err("cannot read stdin");
-+	if (l == 0)
-+		return err_r(-EINVAL, "EOF on stdin");
-+
-+	while (l-- > 0) {
-+		switch (buf[l]) {
-+		case 'q':
-+			/* quit */
-+			r = -EINTR;
-+			break;
-+		case '\n':
-+		case ' ':
-+			/* ignore */
-+			break;
-+		default:
-+			if (isgraph(buf[l]))
-+				fprintf(stderr, "invalid input '%c'\n", buf[l]);
-+			else
-+				fprintf(stderr, "invalid input 0x%x\n", buf[l]);
-+			break;
-+		}
-+	}
-+
-+	return r;
-+}
-+
-+static int master_handle_signal(struct master *m)
-+{
-+	struct signalfd_siginfo val;
-+	ssize_t l;
-+
-+	l = read(m->signal_fd, &val, sizeof(val));
-+	if (l < 0)
-+		return err("cannot read signalfd");
-+	if (l != sizeof(val))
-+		return err_r(-EINVAL, "invalid data from signalfd");
-+
-+	switch (val.ssi_signo) {
-+	case SIGCHLD:
-+		return master_waitpid(m);
-+	case SIGINT:
-+		return err_r(-EINTR, "interrupted");
-+	default:
-+		return err_r(-EINVAL, "caught invalid signal");
-+	}
-+}
-+
-+static int master_handle_bus(struct master *m)
-+{
-+	struct kdbus_cmd_recv recv = { .size = sizeof(recv) };
-+	const struct kdbus_msg *msg = NULL;
-+	const struct kdbus_item *item;
-+	const struct kdbus_vec *vec = NULL;
-+	int r = 0;
-+
-+	/*
-+	 * To receive a message, the KDBUS_CMD_RECV ioctl is used.
-+	 * It takes an argument of type 'struct kdbus_cmd_recv', which
-+	 * will contain information on the received message when the call
-+	 * returns. See kdbus.message(7).
-+	 */
-+	r = kdbus_cmd_recv(m->bus->fd, &recv);
-+	/*
-+	 * EAGAIN is returned when there is no message waiting on this
-+	 * connection. This is not an error - simply bail out.
-+	 */
-+	if (r == -EAGAIN)
-+		return 0;
-+	if (r < 0)
-+		return err_r(r, "cannot receive message");
-+
-+	/*
-+	 * Messages received by a connection are stored inside the connection's
-+	 * pool, at an offset that has been returned in the 'recv' command
-+	 * struct above. The value describes the relative offset from the
-+	 * start address of the pool. A message is described with
-+	 * 'struct kdbus_msg'. See kdbus.message(7).
-+	 */
-+	msg = (void *)(m->bus->pool + recv.msg.offset);
-+
-+	/*
-+	 * A messages describes its actual payload in an array of items.
-+	 * KDBUS_FOREACH() is a simple iterator that walks such an array.
-+	 * struct kdbus_msg has a field to denote its total size, which is
-+	 * needed to determine the number of items in the array.
-+	 */
-+	KDBUS_FOREACH(item, msg->items,
-+		      msg->size - offsetof(struct kdbus_msg, items)) {
-+		/*
-+		 * An item of type PAYLOAD_OFF describes in-line memory
-+		 * stored in the pool at a described offset. That offset is
-+		 * relative to the start address of the message header.
-+		 * This example program only expects one single item of that
-+		 * type, remembers the struct kdbus_vec member of the item
-+		 * when it sees it, and bails out if there is more than one
-+		 * of them.
-+		 */
-+		if (item->type == KDBUS_ITEM_PAYLOAD_OFF) {
-+			if (vec) {
-+				r = err_r(-EEXIST,
-+					  "message with multiple vecs");
-+				break;
-+			}
-+			vec = &item->vec;
-+			if (vec->size != 1) {
-+				r = err_r(-EINVAL, "invalid message size");
-+				break;
-+			}
-+
-+		/*
-+		 * MEMFDs are transported as items of type PAYLOAD_MEMFD.
-+		 * If such an item is attached, a new file descriptor was
-+		 * installed into the task when KDBUS_CMD_RECV was called, and
-+		 * its number is stored in item->memfd.fd.
-+		 * Implementers *must* handle this item type and close the
-+		 * file descriptor when no longer needed in order to prevent
-+		 * file descriptor exhaustion. This example program just bails
-+		 * out with an error in this case, as memfds are not expected
-+		 * in this context.
-+		 */
-+		} else if (item->type == KDBUS_ITEM_PAYLOAD_MEMFD) {
-+			r = err_r(-EINVAL, "message with memfd");
-+			break;
-+		}
-+	}
-+	if (r < 0)
-+		goto exit;
-+	if (!vec) {
-+		r = err_r(-EINVAL, "empty message");
-+		goto exit;
-+	}
-+
-+	switch (*((const uint8_t *)msg + vec->offset)) {
-+	case 'r': {
-+		r = master_reply(m, msg);
-+		break;
-+	}
-+	default:
-+		r = err_r(-EINVAL, "invalid message type");
-+		break;
-+	}
-+
-+exit:
-+	/*
-+	 * We are done with the memory slice that was given to us through
-+	 * recv.msg.offset. Tell the kernel it can use it for other content
-+	 * in the future. See kdbus.pool(7).
-+	 */
-+	bus_poool_free_slice(m->bus, recv.msg.offset);
-+	return r;
-+}
-+
-+static int master_reply(struct master *m, const struct kdbus_msg *msg)
-+{
-+	struct kdbus_cmd_send cmd;
-+	struct kdbus_item *item;
-+	struct kdbus_msg *reply;
-+	size_t size, status, p[2];
-+	int r;
-+
-+	/*
-+	 * This functions sends a message over kdbus. To do this, it uses the
-+	 * KDBUS_CMD_SEND ioctl, which takes a command struct argument of type
-+	 * 'struct kdbus_cmd_send'. This struct stores a pointer to the actual
-+	 * message to send. See kdbus.message(7).
-+	 */
-+	p[0] = m->prime->done;
-+	p[1] = prime_done(m->prime) ? 0 : PRIME_STEPS;
-+
-+	size = sizeof(*reply);
-+	size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_vec));
-+
-+	/* Prepare the message to send */
-+	reply = alloca(size);
-+	memset(reply, 0, size);
-+	reply->size = size;
-+
-+	/* Each message has a cookie that can be used to send replies */
-+	reply->cookie = 1;
-+
-+	/* The payload_type is arbitrary, but it must be non-zero */
-+	reply->payload_type = 0xdeadbeef;
-+
-+	/*
-+	 * We are sending a reply. Let the kernel know the cookie of the
-+	 * message we are replying to.
-+	 */
-+	reply->cookie_reply = msg->cookie;
-+
-+	/*
-+	 * Messages can either be directed to a well-known name (stored as
-+	 * string) or to a unique name (stored as number). This example does
-+	 * the latter. If the message would be directed to a well-known name
-+	 * instead, the message's dst_id field would be set to
-+	 * KDBUS_DST_ID_NAME, and the name would be attaches in an item of type
-+	 * KDBUS_ITEM_DST_NAME. See below for an example, and also refer to
-+	 * kdbus.message(7).
-+	 */
-+	reply->dst_id = msg->src_id;
-+
-+	/* Our message has exactly one item to store its payload */
-+	item = reply->items;
-+	item->type = KDBUS_ITEM_PAYLOAD_VEC;
-+	item->size = KDBUS_ITEM_HEADER_SIZE + sizeof(struct kdbus_vec);
-+	item->vec.address = (uintptr_t)p;
-+	item->vec.size = sizeof(p);
-+
-+	/*
-+	 * Now prepare the command struct, and reference the message we want
-+	 * to send.
-+	 */
-+	memset(&cmd, 0, sizeof(cmd));
-+	cmd.size = sizeof(cmd);
-+	cmd.msg_address = (uintptr_t)reply;
-+
-+	/*
-+	 * Finally, employ the command on the connection owner
-+	 * file descriptor.
-+	 */
-+	r = kdbus_cmd_send(m->bus->fd, &cmd);
-+	if (r < 0)
-+		return err_r(r, "cannot send reply");
-+
-+	if (p[1]) {
-+		prime_consume(m->prime, p[1]);
-+		status = m->prime->done * 10000 / m->prime->max;
-+		if (status != m->prime->status) {
-+			m->prime->status = status;
-+			fprintf(stderr, "status: %7.3lf%%\n",
-+				(double)status / 100);
-+		}
-+	}
-+
-+	return 0;
-+}
-+
-+static int master_waitpid(struct master *m)
-+{
-+	pid_t pid;
-+	int r;
-+
-+	while ((pid = waitpid(-1, &r, WNOHANG)) > 0) {
-+		if (m->n_workers > 0)
-+			--m->n_workers;
-+		if (!WIFEXITED(r))
-+			r = err_r(-EINVAL, "child died unexpectedly");
-+		else if (WEXITSTATUS(r) != 0)
-+			r = err_r(-WEXITSTATUS(r), "child failed");
-+	}
-+
-+	return r;
-+}
-+
-+static int master_spawn(struct master *m)
-+{
-+	struct child *c = NULL;
-+	struct prime *p = NULL;
-+	pid_t pid;
-+	int r;
-+
-+	/* Spawn off one child and call child_run() inside it */
-+
-+	pid = fork();
-+	if (pid < 0)
-+		return err("cannot fork");
-+	if (pid > 0) {
-+		/* parent */
-+		++m->n_workers;
-+		return 0;
-+	}
-+
-+	/* child */
-+
-+	p = m->prime;
-+	m->prime = NULL;
-+	master_free(m);
-+
-+	r = child_new(&c, p);
-+	if (r < 0)
-+		goto exit;
-+
-+	r = child_run(c);
-+
-+exit:
-+	child_free(c);
-+	exit(abs(r));
-+}
-+
-+static int child_new(struct child **out, struct prime *p)
-+{
-+	struct child *c;
-+	int r;
-+
-+	c = calloc(1, sizeof(*c));
-+	if (!c)
-+		return err("cannot allocate child");
-+
-+	c->prime = p;
-+
-+	/*
-+	 * Open a connection to the bus and require each received message to
-+	 * carry a list of the well-known names the sendind connection currently
-+	 * owns. The current UID is needed in order to determine the name of the
-+	 * bus node to connect to.
-+	 */
-+	r = bus_open_connection(&c->bus, getuid(),
-+				arg_busname, KDBUS_ATTACH_NAMES);
-+	if (r < 0)
-+		goto error;
-+
-+	/*
-+	 * Install a kdbus match so the child's connection gets notified when
-+	 * the master loses its well-known name.
-+	 */
-+	r = bus_install_name_loss_match(c->bus, arg_master);
-+	if (r < 0)
-+		goto error;
-+
-+	*out = c;
-+	return 0;
-+
-+error:
-+	child_free(c);
-+	return r;
-+}
-+
-+static void child_free(struct child *c)
-+{
-+	if (!c)
-+		return;
-+
-+	bus_close_connection(c->bus);
-+	prime_free(c->prime);
-+	free(c);
-+}
-+
-+static int child_run(struct child *c)
-+{
-+	struct kdbus_cmd_send cmd;
-+	struct kdbus_item *item;
-+	struct kdbus_vec *vec = NULL;
-+	struct kdbus_msg *msg;
-+	struct timespec spec;
-+	size_t n, steps, size;
-+	int r = 0;
-+
-+	/*
-+	 * Let's send a message to the master and ask for work. To do this,
-+	 * we use the KDBUS_CMD_SEND ioctl, which takes an argument of type
-+	 * 'struct kdbus_cmd_send'. This struct stores a pointer to the actual
-+	 * message to send. See kdbus.message(7).
-+	 */
-+	size = sizeof(*msg);
-+	size += KDBUS_ITEM_SIZE(strlen(arg_master) + 1);
-+	size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_vec));
-+
-+	msg = alloca(size);
-+	memset(msg, 0, size);
-+	msg->size = size;
-+
-+	/*
-+	 * Tell the kernel that we expect a reply to this message. This means
-+	 * that
-+	 *
-+	 * a) The remote peer will gain temporary permission to talk to us
-+	 *    even if it would not be allowed to normally.
-+	 *
-+	 * b) A timeout value is required.
-+	 *
-+	 *    For asynchronous send commands, if no reply is received, we will
-+	 *    get a kernel notification with an item of type
-+	 *    KDBUS_ITEM_REPLY_TIMEOUT attached.
-+	 *
-+	 *    For synchronous send commands (which this example does), the
-+	 *    ioctl will block until a reply is received or the timeout is
-+	 *    exceeded.
-+	 */
-+	msg->flags = KDBUS_MSG_EXPECT_REPLY;
-+
-+	/* Set our cookie. Replies must use this cookie to send their reply. */
-+	msg->cookie = 1;
-+
-+	/* The payload_type is arbitrary, but it must be non-zero */
-+	msg->payload_type = 0xdeadbeef;
-+
-+	/*
-+	 * We are sending our message to the current owner of a well-known
-+	 * name. This makes an item of type KDBUS_ITEM_DST_NAME mandatory.
-+	 */
-+	msg->dst_id = KDBUS_DST_ID_NAME;
-+
-+	/*
-+	 * Set the reply timeout to 5 seconds. Timeouts are always set in
-+	 * absolute timestamps, based con CLOCK_MONOTONIC. See kdbus.message(7).
-+	 */
-+	clock_gettime(CLOCK_MONOTONIC_COARSE, &spec);
-+	msg->timeout_ns += (5 + spec.tv_sec) * 1000ULL * 1000ULL * 1000ULL;
-+	msg->timeout_ns += spec.tv_nsec;
-+
-+	/*
-+	 * Fill the appended items. First, set the well-known name of the
-+	 * destination we want to talk to.
-+	 */
-+	item = msg->items;
-+	item->type = KDBUS_ITEM_DST_NAME;
-+	item->size = KDBUS_ITEM_HEADER_SIZE + strlen(arg_master) + 1;
-+	strcpy(item->str, arg_master);
-+
-+	/*
-+	 * The 2nd item contains a vector to memory we want to send. It
-+	 * can be content of any type. In our case, we're sending a one-byte
-+	 * string only. The memory referenced by this item will be copied into
-+	 * the pool of the receiver connection, and does not need to be valid
-+	 * after the command is employed.
-+	 */
-+	item = KDBUS_ITEM_NEXT(item);
-+	item->type = KDBUS_ITEM_PAYLOAD_VEC;
-+	item->size = KDBUS_ITEM_HEADER_SIZE + sizeof(struct kdbus_vec);
-+	item->vec.address = (uintptr_t)"r";
-+	item->vec.size = 1;
-+
-+	/* Set up the command struct and reference the message we prepared */
-+	memset(&cmd, 0, sizeof(cmd));
-+	cmd.size = sizeof(cmd);
-+	cmd.msg_address = (uintptr_t)msg;
-+
-+	/*
-+	 * The send commands knows a mode in which it will block until a
-+	 * reply to a message is received. This example uses that mode.
-+	 * The pool offset to the received reply will be stored in the command
-+	 * struct after the send command returned. See below.
-+	 */
-+	cmd.flags = KDBUS_SEND_SYNC_REPLY;
-+
-+	/*
-+	 * Finally, employ the command on the connection owner
-+	 * file descriptor.
-+	 */
-+	r = kdbus_cmd_send(c->bus->fd, &cmd);
-+	if (r == -ESRCH || r == -EPIPE || r == -ECONNRESET)
-+		return 0;
-+	if (r < 0)
-+		return err_r(r, "cannot send request to master");
-+
-+	/*
-+	 * The command was sent with the KDBUS_SEND_SYNC_REPLY flag set,
-+	 * and returned successfully, which means that cmd.reply.offset now
-+	 * points to a message inside our connection's pool where the reply
-+	 * is found. This is equivalent to receiving the reply with
-+	 * KDBUS_CMD_RECV, but it doesn't require waiting for the reply with
-+	 * poll() and also saves the ioctl to receive the message.
-+	 */
-+	msg = (void *)(c->bus->pool + cmd.reply.offset);
-+
-+	/*
-+	 * A messages describes its actual payload in an array of items.
-+	 * KDBUS_FOREACH() is a simple iterator that walks such an array.
-+	 * struct kdbus_msg has a field to denote its total size, which is
-+	 * needed to determine the number of items in the array.
-+	 */
-+	KDBUS_FOREACH(item, msg->items,
-+		      msg->size - offsetof(struct kdbus_msg, items)) {
-+		/*
-+		 * An item of type PAYLOAD_OFF describes in-line memory
-+		 * stored in the pool at a described offset. That offset is
-+		 * relative to the start address of the message header.
-+		 * This example program only expects one single item of that
-+		 * type, remembers the struct kdbus_vec member of the item
-+		 * when it sees it, and bails out if there is more than one
-+		 * of them.
-+		 */
-+		if (item->type == KDBUS_ITEM_PAYLOAD_OFF) {
-+			if (vec) {
-+				r = err_r(-EEXIST,
-+					  "message with multiple vecs");
-+				break;
-+			}
-+			vec = &item->vec;
-+			if (vec->size != 2 * sizeof(size_t)) {
-+				r = err_r(-EINVAL, "invalid message size");
-+				break;
-+			}
-+		/*
-+		 * MEMFDs are transported as items of type PAYLOAD_MEMFD.
-+		 * If such an item is attached, a new file descriptor was
-+		 * installed into the task when KDBUS_CMD_RECV was called, and
-+		 * its number is stored in item->memfd.fd.
-+		 * Implementers *must* handle this item type close the
-+		 * file descriptor when no longer needed in order to prevent
-+		 * file descriptor exhaustion. This example program just bails
-+		 * out with an error in this case, as memfds are not expected
-+		 * in this context.
-+		 */
-+		} else if (item->type == KDBUS_ITEM_PAYLOAD_MEMFD) {
-+			r = err_r(-EINVAL, "message with memfd");
-+			break;
-+		}
-+	}
-+	if (r < 0)
-+		goto exit;
-+	if (!vec) {
-+		r = err_r(-EINVAL, "empty message");
-+		goto exit;
-+	}
-+
-+	n = ((size_t *)((const uint8_t *)msg + vec->offset))[0];
-+	steps = ((size_t *)((const uint8_t *)msg + vec->offset))[1];
-+
-+	while (steps-- > 0) {
-+		++n;
-+		r = prime_run(c->prime, c->bus, n);
-+		if (r < 0)
-+			break;
-+		r = bus_poll(c->bus);
-+		if (r != 0) {
-+			r = r < 0 ? r : -EINTR;
-+			break;
-+		}
-+	}
-+
-+exit:
-+	/*
-+	 * We are done with the memory slice that was given to us through
-+	 * cmd.reply.offset. Tell the kernel it can use it for other content
-+	 * in the future. See kdbus.pool(7).
-+	 */
-+	bus_poool_free_slice(c->bus, cmd.reply.offset);
-+	return r;
-+}
-+
-+/*
-+ * Prime Computation
-+ *
-+ */
-+
-+static int prime_new(struct prime **out)
-+{
-+	struct prime *p;
-+	int r;
-+
-+	p = calloc(1, sizeof(*p));
-+	if (!p)
-+		return err("cannot allocate prime memory");
-+
-+	p->fd = -1;
-+	p->area = MAP_FAILED;
-+	p->max = MAX_PRIMES;
-+
-+	/*
-+	 * Prepare and map a memfd to store the bit-fields for the number
-+	 * ranges we want to perform the prime detection on.
-+	 */
-+	p->fd = syscall(__NR_memfd_create, "prime-area", MFD_CLOEXEC);
-+	if (p->fd < 0) {
-+		r = err("cannot create memfd");
-+		goto error;
-+	}
-+
-+	r = ftruncate(p->fd, p->max / 8 + 1);
-+	if (r < 0) {
-+		r = err("cannot ftruncate area");
-+		goto error;
-+	}
-+
-+	p->area = mmap(NULL, p->max / 8 + 1, PROT_READ | PROT_WRITE,
-+		       MAP_SHARED, p->fd, 0);
-+	if (p->area == MAP_FAILED) {
-+		r = err("cannot mmap memfd");
-+		goto error;
-+	}
-+
-+	*out = p;
-+	return 0;
-+
-+error:
-+	prime_free(p);
-+	return r;
-+}
-+
-+static void prime_free(struct prime *p)
-+{
-+	if (!p)
-+		return;
-+
-+	if (p->area != MAP_FAILED)
-+		munmap(p->area, p->max / 8 + 1);
-+	if (p->fd >= 0)
-+		close(p->fd);
-+	free(p);
-+}
-+
-+static bool prime_done(struct prime *p)
-+{
-+	return p->done >= p->max;
-+}
-+
-+static void prime_consume(struct prime *p, size_t amount)
-+{
-+	p->done += amount;
-+}
-+
-+static int prime_run(struct prime *p, struct bus *cancel, size_t number)
-+{
-+	size_t i, n = 0;
-+	int r;
-+
-+	if (number < 2 || number > 65535)
-+		return 0;
-+
-+	for (i = number * number;
-+	     i < p->max && i > number;
-+	     i += number) {
-+		p->area[i / 8] |= 1 << (i % 8);
-+
-+		if (!(++n % (1 << 20))) {
-+			r = bus_poll(cancel);
-+			if (r != 0)
-+				return r < 0 ? r : -EINTR;
-+		}
-+	}
-+
-+	return 0;
-+}
-+
-+static void prime_print(struct prime *p)
-+{
-+	size_t i, l = 0;
-+
-+	fprintf(stderr, "PRIMES:");
-+	for (i = 0; i < p->max; ++i) {
-+		if (!(p->area[i / 8] & (1 << (i % 8))))
-+			fprintf(stderr, "%c%7zu", !(l++ % 16) ? '\n' : ' ', i);
-+	}
-+	fprintf(stderr, "\nEND\n");
-+}
-+
-+static int bus_open_connection(struct bus **out, uid_t uid, const char *name,
-+			       uint64_t recv_flags)
-+{
-+	struct kdbus_cmd_hello hello;
-+	char path[128];
-+	struct bus *b;
-+	int r;
-+
-+	/*
-+	 * The 'bus' object is our representation of a kdbus connection which
-+	 * stores two details: the connection owner file descriptor, and the
-+	 * mmap()ed memory of its associated pool. See kdbus.connection(7) and
-+	 * kdbus.pool(7).
-+	 */
-+	b = calloc(1, sizeof(*b));
-+	if (!b)
-+		return err("cannot allocate bus memory");
-+
-+	b->fd = -1;
-+	b->pool = MAP_FAILED;
-+
-+	/* Compute the name of the bus node to connect to. */
-+	snprintf(path, sizeof(path), "/sys/fs/%s/%lu-%s/bus",
-+		 arg_modname, (unsigned long)uid, name);
-+	b->fd = open(path, O_RDWR | O_CLOEXEC);
-+	if (b->fd < 0) {
-+		r = err("cannot open bus");
-+		goto error;
-+	}
-+
-+	/*
-+	 * To make a connection to the bus, the KDBUS_CMD_HELLO ioctl is used.
-+	 * It takes an argument of type 'struct kdbus_cmd_hello'.
-+	 */
-+	memset(&hello, 0, sizeof(hello));
-+	hello.size = sizeof(hello);
-+
-+	/*
-+	 * Specify a mask of metadata attach flags, describing metadata items
-+	 * that this new connection allows to be sent.
-+	 */
-+	hello.attach_flags_send = _KDBUS_ATTACH_ALL;
-+
-+	/*
-+	 * Specify a mask of metadata attach flags, describing metadata items
-+	 * that this new connection wants to be receive along with each message.
-+	 */
-+	hello.attach_flags_recv = recv_flags;
-+
-+	/*
-+	 * A connection may choose the size of its pool, but the number has to
-+	 * comply with two rules: a) it must be greater than 0, and b) it must
-+	 * be a mulitple of PAGE_SIZE. See kdbus.pool(7).
-+	 */
-+	hello.pool_size = POOL_SIZE;
-+
-+	/*
-+	 * Now employ the command on the file descriptor opened above.
-+	 * This command will turn the file descriptor into a connection-owner
-+	 * file descriptor that controls the life-time of the connection; once
-+	 * it's closed, the connection is shut down.
-+	 */
-+	r = kdbus_cmd_hello(b->fd, &hello);
-+	if (r < 0) {
-+		err_r(r, "HELLO failed");
-+		goto error;
-+	}
-+
-+	bus_poool_free_slice(b, hello.offset);
-+
-+	/*
-+	 * Map the pool of the connection. Its size has been set in the
-+	 * command struct above. See kdbus.pool(7).
-+	 */
-+	b->pool = mmap(NULL, POOL_SIZE, PROT_READ, MAP_SHARED, b->fd, 0);
-+	if (b->pool == MAP_FAILED) {
-+		r = err("cannot mmap pool");
-+		goto error;
-+	}
-+
-+	*out = b;
-+	return 0;
-+
-+error:
-+	bus_close_connection(b);
-+	return r;
-+}
-+
-+static void bus_close_connection(struct bus *b)
-+{
-+	if (!b)
-+		return;
-+
-+	/*
-+	 * A bus connection is closed by simply calling close() on the
-+	 * connection owner file descriptor. The unique name and all owned
-+	 * well-known names of the conneciton will disappear.
-+	 * See kdbus.connection(7).
-+	 */
-+	if (b->pool != MAP_FAILED)
-+		munmap(b->pool, POOL_SIZE);
-+	if (b->fd >= 0)
-+		close(b->fd);
-+	free(b);
-+}
-+
-+static void bus_poool_free_slice(struct bus *b, uint64_t offset)
-+{
-+	struct kdbus_cmd_free cmd = {
-+		.size = sizeof(cmd),
-+		.offset = offset,
-+	};
-+	int r;
-+
-+	/*
-+	 * Once we're done with a piece of pool memory that was returned
-+	 * by a command, we have to call the KDBUS_CMD_FREE ioctl on it so it
-+	 * can be reused. The command takes an argument of type
-+	 * 'struct kdbus_cmd_free', in which the pool offset of the slice to
-+	 * free is stored. The ioctl is employed on the connection owner
-+	 * file descriptor. See kdbus.pool(7),
-+	 */
-+	r = kdbus_cmd_free(b->fd, &cmd);
-+	if (r < 0)
-+		err_r(r, "cannot free pool slice");
-+}
-+
-+static int bus_acquire_name(struct bus *b, const char *name)
-+{
-+	struct kdbus_item *item;
-+	struct kdbus_cmd *cmd;
-+	size_t size;
-+	int r;
-+
-+	/*
-+	 * This function acquires a well-known name on the bus through the
-+	 * KDBUS_CMD_NAME_ACQUIRE ioctl. This ioctl takes an argument of type
-+	 * 'struct kdbus_cmd', which is assembled below. See kdbus.name(7).
-+	 */
-+	size = sizeof(*cmd);
-+	size += KDBUS_ITEM_SIZE(strlen(name) + 1);
-+
-+	cmd = alloca(size);
-+	memset(cmd, 0, size);
-+	cmd->size = size;
-+
-+	/*
-+	 * The command requires an item of type KDBUS_ITEM_NAME, and its
-+	 * content must be a valid bus name.
-+	 */
-+	item = cmd->items;
-+	item->type = KDBUS_ITEM_NAME;
-+	item->size = KDBUS_ITEM_HEADER_SIZE + strlen(name) + 1;
-+	strcpy(item->str, name);
-+
-+	/*
-+	 * Employ the command on the connection owner file descriptor.
-+	 */
-+	r = kdbus_cmd_name_acquire(b->fd, cmd);
-+	if (r < 0)
-+		return err_r(r, "cannot acquire name");
-+
-+	return 0;
-+}
-+
-+static int bus_install_name_loss_match(struct bus *b, const char *name)
-+{
-+	struct kdbus_cmd_match *match;
-+	struct kdbus_item *item;
-+	size_t size;
-+	int r;
-+
-+	/*
-+	 * In order to install a match for signal messages, we have to
-+	 * assemble a 'struct kdbus_cmd_match' and use it along with the
-+	 * KDBUS_CMD_MATCH_ADD ioctl. See kdbus.match(7).
-+	 */
-+	size = sizeof(*match);
-+	size += KDBUS_ITEM_SIZE(sizeof(item->name_change) + strlen(name) + 1);
-+
-+	match = alloca(size);
-+	memset(match, 0, size);
-+	match->size = size;
-+
-+	/*
-+	 * A match is comprised of many 'rules', each of which describes a
-+	 * mandatory detail of the message. All rules of a match must be
-+	 * satified in order to make a message pass.
-+	 */
-+	item = match->items;
-+
-+	/*
-+	 * In this case, we're interested in notifications that inform us
-+	 * about a well-known name being removed from the bus.
-+	 */
-+	item->type = KDBUS_ITEM_NAME_REMOVE;
-+	item->size = KDBUS_ITEM_HEADER_SIZE +
-+			sizeof(item->name_change) + strlen(name) + 1;
-+
-+	/*
-+	 * We could limit the match further and require a specific unique-ID
-+	 * to be the new or the old owner of the name. In this case, however,
-+	 * we don't, and allow 'any' id.
-+	 */
-+	item->name_change.old_id.id = KDBUS_MATCH_ID_ANY;
-+	item->name_change.new_id.id = KDBUS_MATCH_ID_ANY;
-+
-+	/* Copy in the well-known name we're interested in */
-+	strcpy(item->name_change.name, name);
-+
-+	/*
-+	 * Add the match through the KDBUS_CMD_MATCH_ADD ioctl, employed on
-+	 * the connection owner fd.
-+	 */
-+	r = kdbus_cmd_match_add(b->fd, match);
-+	if (r < 0)
-+		return err_r(r, "cannot add match");
-+
-+	return 0;
-+}
-+
-+static int bus_poll(struct bus *b)
-+{
-+	struct pollfd fds[1] = {};
-+	int r;
-+
-+	/*
-+	 * A connection endpoint supports poll() and will wake-up the
-+	 * task with POLLIN set once a message has arrived.
-+	 */
-+	fds[0].fd = b->fd;
-+	fds[0].events = POLLIN;
-+	r = poll(fds, sizeof(fds) / sizeof(*fds), 0);
-+	if (r < 0)
-+		return err("cannot poll bus");
-+	return !!(fds[0].revents & POLLIN);
-+}
-+
-+static int bus_make(uid_t uid, const char *name)
-+{
-+	struct kdbus_item *item;
-+	struct kdbus_cmd *make;
-+	char path[128], busname[128];
-+	size_t size;
-+	int r, fd;
-+
-+	/*
-+	 * Compute the full path to the 'control' node. 'arg_modname' may be
-+	 * set to a different value than 'kdbus' for development purposes.
-+	 * The 'control' node is the primary entry point to kdbus that must be
-+	 * used in order to create a bus. See kdbus(7) and kdbus.bus(7).
-+	 */
-+	snprintf(path, sizeof(path), "/sys/fs/%s/control", arg_modname);
-+
-+	/*
-+	 * Compute the bus name. A valid bus name must always be prefixed with
-+	 * the EUID of the currently running process in order to avoid name
-+	 * conflicts. See kdbus.bus(7).
-+	 */
-+	snprintf(busname, sizeof(busname), "%lu-%s", (unsigned long)uid, name);
-+
-+	fd = open(path, O_RDWR | O_CLOEXEC);
-+	if (fd < 0)
-+		return err("cannot open control file");
-+
-+	/*
-+	 * The KDBUS_CMD_BUS_MAKE ioctl takes an argument of type
-+	 * 'struct kdbus_cmd', and expects at least two items attached to
-+	 * it: one to decribe the bloom parameters to be propagated to
-+	 * connections of the bus, and the name of the bus that was computed
-+	 * above. Assemble this struct now, and fill it with values.
-+	 */
-+	size = sizeof(*make);
-+	size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_bloom_parameter));
-+	size += KDBUS_ITEM_SIZE(strlen(busname) + 1);
-+
-+	make = alloca(size);
-+	memset(make, 0, size);
-+	make->size = size;
-+
-+	/*
-+	 * Each item has a 'type' and 'size' field, and must be stored at an
-+	 * 8-byte aligned address. The KDBUS_ITEM_NEXT macro is used to advance
-+	 * the pointer. See kdbus.item(7) for more details.
-+	 */
-+	item = make->items;
-+	item->type = KDBUS_ITEM_BLOOM_PARAMETER;
-+	item->size = KDBUS_ITEM_HEADER_SIZE + sizeof(item->bloom_parameter);
-+	item->bloom_parameter.size = 8;
-+	item->bloom_parameter.n_hash = 1;
-+
-+	/* The name of the new bus is stored in the next item. */
-+	item = KDBUS_ITEM_NEXT(item);
-+	item->type = KDBUS_ITEM_MAKE_NAME;
-+	item->size = KDBUS_ITEM_HEADER_SIZE + strlen(busname) + 1;
-+	strcpy(item->str, busname);
-+
-+	/*
-+	 * Now create the bus via the KDBUS_CMD_BUS_MAKE ioctl and return the
-+	 * fd that was used back to the caller of this function. This fd is now
-+	 * called a 'bus owner file descriptor', and it controls the life-time
-+	 * of the newly created bus; once the file descriptor is closed, the
-+	 * bus goes away, and all connections are shut down. See kdbus.bus(7).
-+	 */
-+	r = kdbus_cmd_bus_make(fd, make);
-+	if (r < 0) {
-+		err_r(r, "cannot make bus");
-+		close(fd);
-+		return r;
-+	}
-+
-+	return fd;
-+}
-+
-+#else
-+
-+#warning "Skipping compilation due to unsupported libc version"
-+
-+int main(int argc, char **argv)
-+{
-+	fprintf(stderr,
-+		"Compilation of %s was skipped due to unsupported libc.\n",
-+		argv[0]);
-+
-+	return EXIT_FAILURE;
-+}
-+
-+#endif /* libc sanity check */
-diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
-index 95abddc..b57100c 100644
---- a/tools/testing/selftests/Makefile
-+++ b/tools/testing/selftests/Makefile
-@@ -5,6 +5,7 @@ TARGETS += exec
- TARGETS += firmware
- TARGETS += ftrace
- TARGETS += kcmp
-+TARGETS += kdbus
- TARGETS += memfd
- TARGETS += memory-hotplug
- TARGETS += mount
-diff --git a/tools/testing/selftests/kdbus/.gitignore b/tools/testing/selftests/kdbus/.gitignore
-new file mode 100644
-index 0000000..d3ef42f
---- /dev/null
-+++ b/tools/testing/selftests/kdbus/.gitignore
-@@ -0,0 +1 @@
-+kdbus-test
-diff --git a/tools/testing/selftests/kdbus/Makefile b/tools/testing/selftests/kdbus/Makefile
-new file mode 100644
-index 0000000..8f36cb5
---- /dev/null
-+++ b/tools/testing/selftests/kdbus/Makefile
-@@ -0,0 +1,49 @@
-+CFLAGS += -I../../../../usr/include/
-+CFLAGS += -I../../../../samples/kdbus/
-+CFLAGS += -I../../../../include/uapi/
-+CFLAGS += -std=gnu99
-+CFLAGS += -DKBUILD_MODNAME=\"kdbus\" -D_GNU_SOURCE
-+LDLIBS = -pthread -lcap -lm
-+
-+OBJS= \
-+	kdbus-enum.o		\
-+	kdbus-util.o		\
-+	kdbus-test.o		\
-+	kdbus-test.o		\
-+	test-activator.o	\
-+	test-benchmark.o	\
-+	test-bus.o		\
-+	test-chat.o		\
-+	test-connection.o	\
-+	test-daemon.o		\
-+	test-endpoint.o		\
-+	test-fd.o		\
-+	test-free.o		\
-+	test-match.o		\
-+	test-message.o		\
-+	test-metadata-ns.o	\
-+	test-monitor.o		\
-+	test-names.o		\
-+	test-policy.o		\
-+	test-policy-ns.o	\
-+	test-policy-priv.o	\
-+	test-sync.o		\
-+	test-timeout.o
-+
-+all: kdbus-test
-+
-+include ../lib.mk
-+
-+%.o: %.c kdbus-enum.h kdbus-test.h kdbus-util.h
-+	$(CC) $(CFLAGS) -c $< -o $@
-+
-+kdbus-test: $(OBJS)
-+	$(CC) $(CFLAGS) $^ $(LDLIBS) -o $@
-+
-+TEST_PROGS := kdbus-test
-+
-+run_tests:
-+	./kdbus-test --tap
-+
-+clean:
-+	rm -f *.o kdbus-test
-diff --git a/tools/testing/selftests/kdbus/kdbus-enum.c b/tools/testing/selftests/kdbus/kdbus-enum.c
-new file mode 100644
-index 0000000..4f1e579
---- /dev/null
-+++ b/tools/testing/selftests/kdbus/kdbus-enum.c
-@@ -0,0 +1,94 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#include <stdio.h>
-+#include <string.h>
-+#include <fcntl.h>
-+#include <stdlib.h>
-+#include <stddef.h>
-+#include <unistd.h>
-+#include <stdint.h>
-+#include <errno.h>
-+
-+#include "kdbus-util.h"
-+#include "kdbus-enum.h"
-+
-+struct kdbus_enum_table {
-+	long long id;
-+	const char *name;
-+};
-+
-+#define TABLE(what) static struct kdbus_enum_table kdbus_table_##what[]
-+#define ENUM(_id) { .id = _id, .name = STRINGIFY(_id) }
-+#define LOOKUP(what)							\
-+	const char *enum_##what(long long id)				\
-+	{								\
-+		for (size_t i = 0; i < ELEMENTSOF(kdbus_table_##what); i++) \
-+			if (id == kdbus_table_##what[i].id)		\
-+				return kdbus_table_##what[i].name;	\
-+		return "UNKNOWN";					\
-+	}
-+
-+TABLE(CMD) = {
-+	ENUM(KDBUS_CMD_BUS_MAKE),
-+	ENUM(KDBUS_CMD_ENDPOINT_MAKE),
-+	ENUM(KDBUS_CMD_HELLO),
-+	ENUM(KDBUS_CMD_SEND),
-+	ENUM(KDBUS_CMD_RECV),
-+	ENUM(KDBUS_CMD_LIST),
-+	ENUM(KDBUS_CMD_NAME_RELEASE),
-+	ENUM(KDBUS_CMD_CONN_INFO),
-+	ENUM(KDBUS_CMD_MATCH_ADD),
-+	ENUM(KDBUS_CMD_MATCH_REMOVE),
-+};
-+LOOKUP(CMD);
-+
-+TABLE(MSG) = {
-+	ENUM(_KDBUS_ITEM_NULL),
-+	ENUM(KDBUS_ITEM_PAYLOAD_VEC),
-+	ENUM(KDBUS_ITEM_PAYLOAD_OFF),
-+	ENUM(KDBUS_ITEM_PAYLOAD_MEMFD),
-+	ENUM(KDBUS_ITEM_FDS),
-+	ENUM(KDBUS_ITEM_BLOOM_PARAMETER),
-+	ENUM(KDBUS_ITEM_BLOOM_FILTER),
-+	ENUM(KDBUS_ITEM_DST_NAME),
-+	ENUM(KDBUS_ITEM_MAKE_NAME),
-+	ENUM(KDBUS_ITEM_ATTACH_FLAGS_SEND),
-+	ENUM(KDBUS_ITEM_ATTACH_FLAGS_RECV),
-+	ENUM(KDBUS_ITEM_ID),
-+	ENUM(KDBUS_ITEM_NAME),
-+	ENUM(KDBUS_ITEM_TIMESTAMP),
-+	ENUM(KDBUS_ITEM_CREDS),
-+	ENUM(KDBUS_ITEM_PIDS),
-+	ENUM(KDBUS_ITEM_AUXGROUPS),
-+	ENUM(KDBUS_ITEM_OWNED_NAME),
-+	ENUM(KDBUS_ITEM_TID_COMM),
-+	ENUM(KDBUS_ITEM_PID_COMM),
-+	ENUM(KDBUS_ITEM_EXE),
-+	ENUM(KDBUS_ITEM_CMDLINE),
-+	ENUM(KDBUS_ITEM_CGROUP),
-+	ENUM(KDBUS_ITEM_CAPS),
-+	ENUM(KDBUS_ITEM_SECLABEL),
-+	ENUM(KDBUS_ITEM_AUDIT),
-+	ENUM(KDBUS_ITEM_CONN_DESCRIPTION),
-+	ENUM(KDBUS_ITEM_NAME_ADD),
-+	ENUM(KDBUS_ITEM_NAME_REMOVE),
-+	ENUM(KDBUS_ITEM_NAME_CHANGE),
-+	ENUM(KDBUS_ITEM_ID_ADD),
-+	ENUM(KDBUS_ITEM_ID_REMOVE),
-+	ENUM(KDBUS_ITEM_REPLY_TIMEOUT),
-+	ENUM(KDBUS_ITEM_REPLY_DEAD),
-+};
-+LOOKUP(MSG);
-+
-+TABLE(PAYLOAD) = {
-+	ENUM(KDBUS_PAYLOAD_KERNEL),
-+	ENUM(KDBUS_PAYLOAD_DBUS),
-+};
-+LOOKUP(PAYLOAD);
-diff --git a/tools/testing/selftests/kdbus/kdbus-enum.h b/tools/testing/selftests/kdbus/kdbus-enum.h
-new file mode 100644
-index 0000000..ed28cca
---- /dev/null
-+++ b/tools/testing/selftests/kdbus/kdbus-enum.h
-@@ -0,0 +1,15 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#pragma once
-+
-+const char *enum_CMD(long long id);
-+const char *enum_MSG(long long id);
-+const char *enum_MATCH(long long id);
-+const char *enum_PAYLOAD(long long id);
-diff --git a/tools/testing/selftests/kdbus/kdbus-test.c b/tools/testing/selftests/kdbus/kdbus-test.c
-new file mode 100644
-index 0000000..db57381
---- /dev/null
-+++ b/tools/testing/selftests/kdbus/kdbus-test.c
-@@ -0,0 +1,905 @@
-+#include <errno.h>
-+#include <stdio.h>
-+#include <string.h>
-+#include <fcntl.h>
-+#include <stdlib.h>
-+#include <stddef.h>
-+#include <time.h>
-+#include <unistd.h>
-+#include <stdint.h>
-+#include <assert.h>
-+#include <getopt.h>
-+#include <stdbool.h>
-+#include <signal.h>
-+#include <sys/mount.h>
-+#include <sys/prctl.h>
-+#include <sys/wait.h>
-+#include <sys/syscall.h>
-+#include <sys/eventfd.h>
-+#include <linux/sched.h>
-+
-+#include "kdbus-util.h"
-+#include "kdbus-enum.h"
-+#include "kdbus-test.h"
-+
-+enum {
-+	TEST_CREATE_BUS		= 1 << 0,
-+	TEST_CREATE_CONN	= 1 << 1,
-+};
-+
-+struct kdbus_test {
-+	const char *name;
-+	const char *desc;
-+	int (*func)(struct kdbus_test_env *env);
-+	unsigned int flags;
-+};
-+
-+struct kdbus_test_args {
-+	bool mntns;
-+	bool pidns;
-+	bool userns;
-+	char *uid_map;
-+	char *gid_map;
-+	int loop;
-+	int wait;
-+	int fork;
-+	int tap_output;
-+	char *module;
-+	char *root;
-+	char *test;
-+	char *busname;
-+};
-+
-+static const struct kdbus_test tests[] = {
-+	{
-+		.name	= "bus-make",
-+		.desc	= "bus make functions",
-+		.func	= kdbus_test_bus_make,
-+		.flags	= 0,
-+	},
-+	{
-+		.name	= "hello",
-+		.desc	= "the HELLO command",
-+		.func	= kdbus_test_hello,
-+		.flags	= TEST_CREATE_BUS,
-+	},
-+	{
-+		.name	= "byebye",
-+		.desc	= "the BYEBYE command",
-+		.func	= kdbus_test_byebye,
-+		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
-+	},
-+	{
-+		.name	= "chat",
-+		.desc	= "a chat pattern",
-+		.func	= kdbus_test_chat,
-+		.flags	= TEST_CREATE_BUS,
-+	},
-+	{
-+		.name	= "daemon",
-+		.desc	= "a simple daemon",
-+		.func	= kdbus_test_daemon,
-+		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
-+	},
-+	{
-+		.name	= "fd-passing",
-+		.desc	= "file descriptor passing",
-+		.func	= kdbus_test_fd_passing,
-+		.flags	= TEST_CREATE_BUS,
-+	},
-+	{
-+		.name	= "endpoint",
-+		.desc	= "custom endpoint",
-+		.func	= kdbus_test_custom_endpoint,
-+		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
-+	},
-+	{
-+		.name	= "monitor",
-+		.desc	= "monitor functionality",
-+		.func	= kdbus_test_monitor,
-+		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
-+	},
-+	{
-+		.name	= "name-basics",
-+		.desc	= "basic name registry functions",
-+		.func	= kdbus_test_name_basic,
-+		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
-+	},
-+	{
-+		.name	= "name-conflict",
-+		.desc	= "name registry conflict details",
-+		.func	= kdbus_test_name_conflict,
-+		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
-+	},
-+	{
-+		.name	= "name-queue",
-+		.desc	= "queuing of names",
-+		.func	= kdbus_test_name_queue,
-+		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
-+	},
-+	{
-+		.name	= "name-takeover",
-+		.desc	= "takeover of names",
-+		.func	= kdbus_test_name_takeover,
-+		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
-+	},
-+	{
-+		.name	= "message-basic",
-+		.desc	= "basic message handling",
-+		.func	= kdbus_test_message_basic,
-+		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
-+	},
-+	{
-+		.name	= "message-prio",
-+		.desc	= "handling of messages with priority",
-+		.func	= kdbus_test_message_prio,
-+		.flags	= TEST_CREATE_BUS,
-+	},
-+	{
-+		.name	= "message-quota",
-+		.desc	= "message quotas are enforced",
-+		.func	= kdbus_test_message_quota,
-+		.flags	= TEST_CREATE_BUS,
-+	},
-+	{
-+		.name	= "memory-access",
-+		.desc	= "memory access",
-+		.func	= kdbus_test_memory_access,
-+		.flags	= TEST_CREATE_BUS,
-+	},
-+	{
-+		.name	= "timeout",
-+		.desc	= "timeout",
-+		.func	= kdbus_test_timeout,
-+		.flags	= TEST_CREATE_BUS,
-+	},
-+	{
-+		.name	= "sync-byebye",
-+		.desc	= "synchronous replies vs. BYEBYE",
-+		.func	= kdbus_test_sync_byebye,
-+		.flags	= TEST_CREATE_BUS,
-+	},
-+	{
-+		.name	= "sync-reply",
-+		.desc	= "synchronous replies",
-+		.func	= kdbus_test_sync_reply,
-+		.flags	= TEST_CREATE_BUS,
-+	},
-+	{
-+		.name	= "message-free",
-+		.desc	= "freeing of memory",
-+		.func	= kdbus_test_free,
-+		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
-+	},
-+	{
-+		.name	= "connection-info",
-+		.desc	= "retrieving connection information",
-+		.func	= kdbus_test_conn_info,
-+		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
-+	},
-+	{
-+		.name	= "connection-update",
-+		.desc	= "updating connection information",
-+		.func	= kdbus_test_conn_update,
-+		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
-+	},
-+	{
-+		.name	= "writable-pool",
-+		.desc	= "verifying pools are never writable",
-+		.func	= kdbus_test_writable_pool,
-+		.flags	= TEST_CREATE_BUS,
-+	},
-+	{
-+		.name	= "policy",
-+		.desc	= "policy",
-+		.func	= kdbus_test_policy,
-+		.flags	= TEST_CREATE_BUS,
-+	},
-+	{
-+		.name	= "policy-priv",
-+		.desc	= "unprivileged bus access",
-+		.func	= kdbus_test_policy_priv,
-+		.flags	= TEST_CREATE_BUS,
-+	},
-+	{
-+		.name	= "policy-ns",
-+		.desc	= "policy in user namespaces",
-+		.func	= kdbus_test_policy_ns,
-+		.flags	= TEST_CREATE_BUS,
-+	},
-+	{
-+		.name	= "metadata-ns",
-+		.desc	= "metadata in different namespaces",
-+		.func	= kdbus_test_metadata_ns,
-+		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
-+	},
-+	{
-+		.name	= "match-id-add",
-+		.desc	= "adding of matches by id",
-+		.func	= kdbus_test_match_id_add,
-+		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
-+	},
-+	{
-+		.name	= "match-id-remove",
-+		.desc	= "removing of matches by id",
-+		.func	= kdbus_test_match_id_remove,
-+		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
-+	},
-+	{
-+		.name	= "match-replace",
-+		.desc	= "replace of matches with the same cookie",
-+		.func	= kdbus_test_match_replace,
-+		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
-+	},
-+	{
-+		.name	= "match-name-add",
-+		.desc	= "adding of matches by name",
-+		.func	= kdbus_test_match_name_add,
-+		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
-+	},
-+	{
-+		.name	= "match-name-remove",
-+		.desc	= "removing of matches by name",
-+		.func	= kdbus_test_match_name_remove,
-+		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
-+	},
-+	{
-+		.name	= "match-name-change",
-+		.desc	= "matching for name changes",
-+		.func	= kdbus_test_match_name_change,
-+		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
-+	},
-+	{
-+		.name	= "match-bloom",
-+		.desc	= "matching with bloom filters",
-+		.func	= kdbus_test_match_bloom,
-+		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
-+	},
-+	{
-+		.name	= "activator",
-+		.desc	= "activator connections",
-+		.func	= kdbus_test_activator,
-+		.flags	= TEST_CREATE_BUS | TEST_CREATE_CONN,
-+	},
-+	{
-+		.name	= "benchmark",
-+		.desc	= "benchmark",
-+		.func	= kdbus_test_benchmark,
-+		.flags	= TEST_CREATE_BUS,
-+	},
-+	{
-+		.name	= "benchmark-nomemfds",
-+		.desc	= "benchmark without using memfds",
-+		.func	= kdbus_test_benchmark_nomemfds,
-+		.flags	= TEST_CREATE_BUS,
-+	},
-+	{
-+		.name	= "benchmark-uds",
-+		.desc	= "benchmark comparison to UDS",
-+		.func	= kdbus_test_benchmark_uds,
-+		.flags	= TEST_CREATE_BUS,
-+	},
-+};
-+
-+#define N_TESTS ((int) (sizeof(tests) / sizeof(tests[0])))
-+
-+static int test_prepare_env(const struct kdbus_test *t,
-+			    const struct kdbus_test_args *args,
-+			    struct kdbus_test_env *env)
-+{
-+	if (t->flags & TEST_CREATE_BUS) {
-+		char *s;
-+		char *n = NULL;
-+		int ret;
-+
-+		asprintf(&s, "%s/control", args->root);
-+
-+		env->control_fd = open(s, O_RDWR);
-+		free(s);
-+		ASSERT_RETURN(env->control_fd >= 0);
-+
-+		if (!args->busname) {
-+			n = unique_name("test-bus");
-+			ASSERT_RETURN(n);
-+		}
-+
-+		ret = kdbus_create_bus(env->control_fd,
-+				       args->busname ?: n,
-+				       _KDBUS_ATTACH_ALL, &s);
-+		free(n);
-+		ASSERT_RETURN(ret == 0);
-+
-+		asprintf(&env->buspath, "%s/%s/bus", args->root, s);
-+		free(s);
-+	}
-+
-+	if (t->flags & TEST_CREATE_CONN) {
-+		env->conn = kdbus_hello(env->buspath, 0, NULL, 0);
-+		ASSERT_RETURN(env->conn);
-+	}
-+
-+	env->root = args->root;
-+	env->module = args->module;
-+
-+	return 0;
-+}
-+
-+void test_unprepare_env(const struct kdbus_test *t, struct kdbus_test_env *env)
-+{
-+	if (env->conn) {
-+		kdbus_conn_free(env->conn);
-+		env->conn = NULL;
-+	}
-+
-+	if (env->control_fd >= 0) {
-+		close(env->control_fd);
-+		env->control_fd = -1;
-+	}
-+
-+	if (env->buspath) {
-+		free(env->buspath);
-+		env->buspath = NULL;
-+	}
-+}
-+
-+static int test_run(const struct kdbus_test *t,
-+		    const struct kdbus_test_args *kdbus_args,
-+		    int wait)
-+{
-+	int ret;
-+	struct kdbus_test_env env = {};
-+
-+	ret = test_prepare_env(t, kdbus_args, &env);
-+	if (ret != TEST_OK)
-+		return ret;
-+
-+	if (wait > 0) {
-+		printf("Sleeping %d seconds before running test ...\n", wait);
-+		sleep(wait);
-+	}
-+
-+	ret = t->func(&env);
-+	test_unprepare_env(t, &env);
-+	return ret;
-+}
-+
-+static int test_run_forked(const struct kdbus_test *t,
-+			   const struct kdbus_test_args *kdbus_args,
-+			   int wait)
-+{
-+	int ret;
-+	pid_t pid;
-+
-+	pid = fork();
-+	if (pid < 0) {
-+		return TEST_ERR;
-+	} else if (pid == 0) {
-+		ret = test_run(t, kdbus_args, wait);
-+		_exit(ret);
-+	}
-+
-+	pid = waitpid(pid, &ret, 0);
-+	if (pid <= 0)
-+		return TEST_ERR;
-+	else if (!WIFEXITED(ret))
-+		return TEST_ERR;
-+	else
-+		return WEXITSTATUS(ret);
-+}
-+
-+static void print_test_result(int ret)
-+{
-+	switch (ret) {
-+	case TEST_OK:
-+		printf("OK");
-+		break;
-+	case TEST_SKIP:
-+		printf("SKIPPED");
-+		break;
-+	case TEST_ERR:
-+		printf("ERROR");
-+		break;
-+	}
-+}
-+
-+static int start_all_tests(struct kdbus_test_args *kdbus_args)
-+{
-+	int ret;
-+	unsigned int fail_cnt = 0;
-+	unsigned int skip_cnt = 0;
-+	unsigned int ok_cnt = 0;
-+	unsigned int i;
-+
-+	if (kdbus_args->tap_output) {
-+		printf("1..%d\n", N_TESTS);
-+		fflush(stdout);
-+	}
-+
-+	kdbus_util_verbose = false;
-+
-+	for (i = 0; i < N_TESTS; i++) {
-+		const struct kdbus_test *t = tests + i;
-+
-+		if (!kdbus_args->tap_output) {
-+			unsigned int n;
-+
-+			printf("Testing %s (%s) ", t->desc, t->name);
-+			for (n = 0; n < 60 - strlen(t->desc) - strlen(t->name); n++)
-+				printf(".");
-+			printf(" ");
-+		}
-+
-+		ret = test_run_forked(t, kdbus_args, 0);
-+		switch (ret) {
-+		case TEST_OK:
-+			ok_cnt++;
-+			break;
-+		case TEST_SKIP:
-+			skip_cnt++;
-+			break;
-+		case TEST_ERR:
-+			fail_cnt++;
-+			break;
-+		}
-+
-+		if (kdbus_args->tap_output) {
-+			printf("%sok %d - %s%s (%s)\n",
-+			       (ret == TEST_ERR) ? "not " : "", i + 1,
-+			       (ret == TEST_SKIP) ? "# SKIP " : "",
-+			       t->desc, t->name);
-+			fflush(stdout);
-+		} else {
-+			print_test_result(ret);
-+			printf("\n");
-+		}
-+	}
-+
-+	if (kdbus_args->tap_output)
-+		printf("Failed %d/%d tests, %.2f%% okay\n", fail_cnt, N_TESTS,
-+		       100.0 - (fail_cnt * 100.0) / ((float) N_TESTS));
-+	else
-+		printf("\nSUMMARY: %u tests passed, %u skipped, %u failed\n",
-+		       ok_cnt, skip_cnt, fail_cnt);
-+
-+	return fail_cnt > 0 ? TEST_ERR : TEST_OK;
-+}
-+
-+static int start_one_test(struct kdbus_test_args *kdbus_args)
-+{
-+	int i, ret;
-+	bool test_found = false;
-+
-+	for (i = 0; i < N_TESTS; i++) {
-+		const struct kdbus_test *t = tests + i;
-+
-+		if (strcmp(t->name, kdbus_args->test))
-+			continue;
-+
-+		do {
-+			test_found = true;
-+			if (kdbus_args->fork)
-+				ret = test_run_forked(t, kdbus_args,
-+						      kdbus_args->wait);
-+			else
-+				ret = test_run(t, kdbus_args,
-+					       kdbus_args->wait);
-+
-+			printf("Testing %s: ", t->desc);
-+			print_test_result(ret);
-+			printf("\n");
-+
-+			if (ret != TEST_OK)
-+				break;
-+		} while (kdbus_args->loop);
-+
-+		return ret;
-+	}
-+
-+	if (!test_found) {
-+		printf("Unknown test-id '%s'\n", kdbus_args->test);
-+		return TEST_ERR;
-+	}
-+
-+	return TEST_OK;
-+}
-+
-+static void usage(const char *argv0)
-+{
-+	unsigned int i, j;
-+
-+	printf("Usage: %s [options]\n"
-+	       "Options:\n"
-+	       "\t-a, --tap		Output test results in TAP format\n"
-+	       "\t-m, --module <module>	Kdbus module name\n"
-+	       "\t-x, --loop		Run in a loop\n"
-+	       "\t-f, --fork		Fork before running a test\n"
-+	       "\t-h, --help		Print this help\n"
-+	       "\t-r, --root <root>	Toplevel of the kdbus hierarchy\n"
-+	       "\t-t, --test <test-id>	Run one specific test only, in verbose mode\n"
-+	       "\t-b, --bus <busname>	Instead of generating a random bus name, take <busname>.\n"
-+	       "\t-w, --wait <secs>	Wait <secs> before actually starting test\n"
-+	       "\t    --mntns		New mount namespace\n"
-+	       "\t    --pidns		New PID namespace\n"
-+	       "\t    --userns		New user namespace\n"
-+	       "\t    --uidmap uid_map	UID map for user namespace\n"
-+	       "\t    --gidmap gid_map	GID map for user namespace\n"
-+	       "\n", argv0);
-+
-+	printf("By default, all test are run once, and a summary is printed.\n"
-+	       "Available tests for --test:\n\n");
-+
-+	for (i = 0; i < N_TESTS; i++) {
-+		const struct kdbus_test *t = tests + i;
-+
-+		printf("\t%s", t->name);
-+
-+		for (j = 0; j < 24 - strlen(t->name); j++)
-+			printf(" ");
-+
-+		printf("Test %s\n", t->desc);
-+	}
-+
-+	printf("\n");
-+	printf("Note that some tests may, if run specifically by --test, "
-+	       "behave differently, and not terminate by themselves.\n");
-+
-+	exit(EXIT_FAILURE);
-+}
-+
-+void print_kdbus_test_args(struct kdbus_test_args *args)
-+{
-+	if (args->userns || args->pidns || args->mntns)
-+		printf("# Starting tests in new %s%s%s namespaces%s\n",
-+			args->mntns ? "MOUNT " : "",
-+			args->pidns ? "PID " : "",
-+			args->userns ? "USER " : "",
-+			args->mntns ? ", kdbusfs will be remounted" : "");
-+	else
-+		printf("# Starting tests in the same namespaces\n");
-+}
-+
-+void print_metadata_support(void)
-+{
-+	bool no_meta_audit, no_meta_cgroups, no_meta_seclabel;
-+
-+	/*
-+	 * KDBUS_ATTACH_CGROUP, KDBUS_ATTACH_AUDIT and
-+	 * KDBUS_ATTACH_SECLABEL
-+	 */
-+	no_meta_audit = !config_auditsyscall_is_enabled();
-+	no_meta_cgroups = !config_cgroups_is_enabled();
-+	no_meta_seclabel = !config_security_is_enabled();
-+
-+	if (no_meta_audit | no_meta_cgroups | no_meta_seclabel)
-+		printf("# Starting tests without %s%s%s metadata support\n",
-+		       no_meta_audit ? "AUDIT " : "",
-+		       no_meta_cgroups ? "CGROUP " : "",
-+		       no_meta_seclabel ? "SECLABEL " : "");
-+	else
-+		printf("# Starting tests with full metadata support\n");
-+}
-+
-+int run_tests(struct kdbus_test_args *kdbus_args)
-+{
-+	int ret;
-+	static char control[4096];
-+
-+	snprintf(control, sizeof(control), "%s/control", kdbus_args->root);
-+
-+	if (access(control, W_OK) < 0) {
-+		printf("Unable to locate control node at '%s'.\n",
-+			control);
-+		return TEST_ERR;
-+	}
-+
-+	if (kdbus_args->test) {
-+		ret = start_one_test(kdbus_args);
-+	} else {
-+		do {
-+			ret = start_all_tests(kdbus_args);
-+			if (ret != TEST_OK)
-+				break;
-+		} while (kdbus_args->loop);
-+	}
-+
-+	return ret;
-+}
-+
-+static void nop_handler(int sig) {}
-+
-+static int test_prepare_mounts(struct kdbus_test_args *kdbus_args)
-+{
-+	int ret;
-+	char kdbusfs[64] = {'\0'};
-+
-+	snprintf(kdbusfs, sizeof(kdbusfs), "%sfs", kdbus_args->module);
-+
-+	/* make current mount slave */
-+	ret = mount(NULL, "/", NULL, MS_SLAVE|MS_REC, NULL);
-+	if (ret < 0) {
-+		ret = -errno;
-+		printf("error mount() root: %d (%m)\n", ret);
-+		return ret;
-+	}
-+
-+	/* Remount procfs since we need it in our tests */
-+	if (kdbus_args->pidns) {
-+		ret = mount("proc", "/proc", "proc",
-+			    MS_NOSUID|MS_NOEXEC|MS_NODEV, NULL);
-+		if (ret < 0) {
-+			ret = -errno;
-+			printf("error mount() /proc : %d (%m)\n", ret);
-+			return ret;
-+		}
-+	}
-+
-+	/* Remount kdbusfs */
-+	ret = mount(kdbusfs, kdbus_args->root, kdbusfs,
-+		    MS_NOSUID|MS_NOEXEC|MS_NODEV, NULL);
-+	if (ret < 0) {
-+		ret = -errno;
-+		printf("error mount() %s :%d (%m)\n", kdbusfs, ret);
-+		return ret;
-+	}
-+
-+	return 0;
-+}
-+
-+int run_tests_in_namespaces(struct kdbus_test_args *kdbus_args)
-+{
-+	int ret;
-+	int efd = -1;
-+	int status;
-+	pid_t pid, rpid;
-+	struct sigaction oldsa;
-+	struct sigaction sa = {
-+		.sa_handler = nop_handler,
-+		.sa_flags = SA_NOCLDSTOP,
-+	};
-+
-+	efd = eventfd(0, EFD_CLOEXEC);
-+	if (efd < 0) {
-+		ret = -errno;
-+		printf("eventfd() failed: %d (%m)\n", ret);
-+		return TEST_ERR;
-+	}
-+
-+	ret = sigaction(SIGCHLD, &sa, &oldsa);
-+	if (ret < 0) {
-+		ret = -errno;
-+		printf("sigaction() failed: %d (%m)\n", ret);
-+		return TEST_ERR;
-+	}
-+
-+	/* setup namespaces */
-+	pid = syscall(__NR_clone, SIGCHLD|
-+		      (kdbus_args->userns ? CLONE_NEWUSER : 0) |
-+		      (kdbus_args->mntns ? CLONE_NEWNS : 0) |
-+		      (kdbus_args->pidns ? CLONE_NEWPID : 0), NULL);
-+	if (pid < 0) {
-+		printf("clone() failed: %d (%m)\n", -errno);
-+		return TEST_ERR;
-+	}
-+
-+	if (pid == 0) {
-+		eventfd_t event_status = 0;
-+
-+		ret = prctl(PR_SET_PDEATHSIG, SIGKILL);
-+		if (ret < 0) {
-+			ret = -errno;
-+			printf("error prctl(): %d (%m)\n", ret);
-+			_exit(TEST_ERR);
-+		}
-+
-+		/* reset sighandlers of childs */
-+		ret = sigaction(SIGCHLD, &oldsa, NULL);
-+		if (ret < 0) {
-+			ret = -errno;
-+			printf("sigaction() failed: %d (%m)\n", ret);
-+			_exit(TEST_ERR);
-+		}
-+
-+		ret = eventfd_read(efd, &event_status);
-+		if (ret < 0 || event_status != 1) {
-+			printf("error eventfd_read()\n");
-+			_exit(TEST_ERR);
-+		}
-+
-+		if (kdbus_args->mntns) {
-+			ret = test_prepare_mounts(kdbus_args);
-+			if (ret < 0) {
-+				printf("error preparing mounts\n");
-+				_exit(TEST_ERR);
-+			}
-+		}
-+
-+		ret = run_tests(kdbus_args);
-+		_exit(ret);
-+	}
-+
-+	/* Setup userns mapping */
-+	if (kdbus_args->userns) {
-+		ret = userns_map_uid_gid(pid, kdbus_args->uid_map,
-+					 kdbus_args->gid_map);
-+		if (ret < 0) {
-+			printf("error mapping uid and gid in userns\n");
-+			eventfd_write(efd, 2);
-+			return TEST_ERR;
-+		}
-+	}
-+
-+	ret = eventfd_write(efd, 1);
-+	if (ret < 0) {
-+		ret = -errno;
-+		printf("error eventfd_write(): %d (%m)\n", ret);
-+		return TEST_ERR;
-+	}
-+
-+	rpid = waitpid(pid, &status, 0);
-+	ASSERT_RETURN_VAL(rpid == pid, TEST_ERR);
-+
-+	close(efd);
-+
-+	if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
-+		return TEST_ERR;
-+
-+	return TEST_OK;
-+}
-+
-+int start_tests(struct kdbus_test_args *kdbus_args)
-+{
-+	int ret;
-+	bool namespaces;
-+	static char fspath[4096];
-+
-+	namespaces = (kdbus_args->mntns || kdbus_args->pidns ||
-+		      kdbus_args->userns);
-+
-+	/* for pidns we need mntns set */
-+	if (kdbus_args->pidns && !kdbus_args->mntns) {
-+		printf("Failed: please set both pid and mnt namesapces\n");
-+		return TEST_ERR;
-+	}
-+
-+	if (kdbus_args->userns) {
-+		if (!config_user_ns_is_enabled()) {
-+			printf("User namespace not supported\n");
-+			return TEST_ERR;
-+		}
-+
-+		if (!kdbus_args->uid_map || !kdbus_args->gid_map) {
-+			printf("Failed: please specify uid or gid mapping\n");
-+			return TEST_ERR;
-+		}
-+	}
-+
-+	print_kdbus_test_args(kdbus_args);
-+	print_metadata_support();
-+
-+	/* setup kdbus paths */
-+	if (!kdbus_args->module)
-+		kdbus_args->module = "kdbus";
-+
-+	if (!kdbus_args->root) {
-+		snprintf(fspath, sizeof(fspath), "/sys/fs/%s",
-+			 kdbus_args->module);
-+		kdbus_args->root = fspath;
-+	}
-+
-+	/* Start tests */
-+	if (namespaces)
-+		ret = run_tests_in_namespaces(kdbus_args);
-+	else
-+		ret = run_tests(kdbus_args);
-+
-+	return ret;
-+}
-+
-+int main(int argc, char *argv[])
-+{
-+	int t, ret = 0;
-+	struct kdbus_test_args *kdbus_args;
-+	enum {
-+		ARG_MNTNS = 0x100,
-+		ARG_PIDNS,
-+		ARG_USERNS,
-+		ARG_UIDMAP,
-+		ARG_GIDMAP,
-+	};
-+
-+	kdbus_args = malloc(sizeof(*kdbus_args));
-+	if (!kdbus_args) {
-+		printf("unable to malloc() kdbus_args\n");
-+		return EXIT_FAILURE;
-+	}
-+
-+	memset(kdbus_args, 0, sizeof(*kdbus_args));
-+
-+	static const struct option options[] = {
-+		{ "loop",	no_argument,		NULL, 'x' },
-+		{ "help",	no_argument,		NULL, 'h' },
-+		{ "root",	required_argument,	NULL, 'r' },
-+		{ "test",	required_argument,	NULL, 't' },
-+		{ "bus",	required_argument,	NULL, 'b' },
-+		{ "wait",	required_argument,	NULL, 'w' },
-+		{ "fork",	no_argument,		NULL, 'f' },
-+		{ "module",	required_argument,	NULL, 'm' },
-+		{ "tap",	no_argument,		NULL, 'a' },
-+		{ "mntns",	no_argument,		NULL, ARG_MNTNS },
-+		{ "pidns",	no_argument,		NULL, ARG_PIDNS },
-+		{ "userns",	no_argument,		NULL, ARG_USERNS },
-+		{ "uidmap",	required_argument,	NULL, ARG_UIDMAP },
-+		{ "gidmap",	required_argument,	NULL, ARG_GIDMAP },
-+		{}
-+	};
-+
-+	srand(time(NULL));
-+
-+	while ((t = getopt_long(argc, argv, "hxfm:r:t:b:w:a", options, NULL)) >= 0) {
-+		switch (t) {
-+		case 'x':
-+			kdbus_args->loop = 1;
-+			break;
-+
-+		case 'm':
-+			kdbus_args->module = optarg;
-+			break;
-+
-+		case 'r':
-+			kdbus_args->root = optarg;
-+			break;
-+
-+		case 't':
-+			kdbus_args->test = optarg;
-+			break;
-+
-+		case 'b':
-+			kdbus_args->busname = optarg;
-+			break;
-+
-+		case 'w':
-+			kdbus_args->wait = strtol(optarg, NULL, 10);
-+			break;
-+
-+		case 'f':
-+			kdbus_args->fork = 1;
-+			break;
-+
-+		case 'a':
-+			kdbus_args->tap_output = 1;
-+			break;
-+
-+		case ARG_MNTNS:
-+			kdbus_args->mntns = true;
-+			break;
-+
-+		case ARG_PIDNS:
-+			kdbus_args->pidns = true;
-+			break;
-+
-+		case ARG_USERNS:
-+			kdbus_args->userns = true;
-+			break;
-+
-+		case ARG_UIDMAP:
-+			kdbus_args->uid_map = optarg;
-+			break;
-+
-+		case ARG_GIDMAP:
-+			kdbus_args->gid_map = optarg;
-+			break;
-+
-+		default:
-+		case 'h':
-+			usage(argv[0]);
-+		}
-+	}
-+
-+	ret = start_tests(kdbus_args);
-+	if (ret == TEST_ERR)
-+		return EXIT_FAILURE;
-+
-+	free(kdbus_args);
-+
-+	return 0;
-+}
-diff --git a/tools/testing/selftests/kdbus/kdbus-test.h b/tools/testing/selftests/kdbus/kdbus-test.h
-new file mode 100644
-index 0000000..ee937f9
---- /dev/null
-+++ b/tools/testing/selftests/kdbus/kdbus-test.h
-@@ -0,0 +1,84 @@
-+#ifndef _TEST_KDBUS_H_
-+#define _TEST_KDBUS_H_
-+
-+struct kdbus_test_env {
-+	char *buspath;
-+	const char *root;
-+	const char *module;
-+	int control_fd;
-+	struct kdbus_conn *conn;
-+};
-+
-+enum {
-+	TEST_OK,
-+	TEST_SKIP,
-+	TEST_ERR,
-+};
-+
-+#define ASSERT_RETURN_VAL(cond, val)		\
-+	if (!(cond)) {			\
-+		fprintf(stderr,	"Assertion '%s' failed in %s(), %s:%d\n", \
-+			#cond, __func__, __FILE__, __LINE__);	\
-+		return val;	\
-+	}
-+
-+#define ASSERT_EXIT_VAL(cond, val)		\
-+	if (!(cond)) {			\
-+		fprintf(stderr, "Assertion '%s' failed in %s(), %s:%d\n", \
-+			#cond, __func__, __FILE__, __LINE__);	\
-+		_exit(val);	\
-+	}
-+
-+#define ASSERT_BREAK(cond)		\
-+	if (!(cond)) {			\
-+		fprintf(stderr, "Assertion '%s' failed in %s(), %s:%d\n", \
-+			#cond, __func__, __FILE__, __LINE__);	\
-+		break; \
-+	}
-+
-+#define ASSERT_RETURN(cond)		\
-+	ASSERT_RETURN_VAL(cond, TEST_ERR)
-+
-+#define ASSERT_EXIT(cond)		\
-+	ASSERT_EXIT_VAL(cond, EXIT_FAILURE)
-+
-+int kdbus_test_activator(struct kdbus_test_env *env);
-+int kdbus_test_benchmark(struct kdbus_test_env *env);
-+int kdbus_test_benchmark_nomemfds(struct kdbus_test_env *env);
-+int kdbus_test_benchmark_uds(struct kdbus_test_env *env);
-+int kdbus_test_bus_make(struct kdbus_test_env *env);
-+int kdbus_test_byebye(struct kdbus_test_env *env);
-+int kdbus_test_chat(struct kdbus_test_env *env);
-+int kdbus_test_conn_info(struct kdbus_test_env *env);
-+int kdbus_test_conn_update(struct kdbus_test_env *env);
-+int kdbus_test_daemon(struct kdbus_test_env *env);
-+int kdbus_test_custom_endpoint(struct kdbus_test_env *env);
-+int kdbus_test_fd_passing(struct kdbus_test_env *env);
-+int kdbus_test_free(struct kdbus_test_env *env);
-+int kdbus_test_hello(struct kdbus_test_env *env);
-+int kdbus_test_match_bloom(struct kdbus_test_env *env);
-+int kdbus_test_match_id_add(struct kdbus_test_env *env);
-+int kdbus_test_match_id_remove(struct kdbus_test_env *env);
-+int kdbus_test_match_replace(struct kdbus_test_env *env);
-+int kdbus_test_match_name_add(struct kdbus_test_env *env);
-+int kdbus_test_match_name_change(struct kdbus_test_env *env);
-+int kdbus_test_match_name_remove(struct kdbus_test_env *env);
-+int kdbus_test_message_basic(struct kdbus_test_env *env);
-+int kdbus_test_message_prio(struct kdbus_test_env *env);
-+int kdbus_test_message_quota(struct kdbus_test_env *env);
-+int kdbus_test_memory_access(struct kdbus_test_env *env);
-+int kdbus_test_metadata_ns(struct kdbus_test_env *env);
-+int kdbus_test_monitor(struct kdbus_test_env *env);
-+int kdbus_test_name_basic(struct kdbus_test_env *env);
-+int kdbus_test_name_conflict(struct kdbus_test_env *env);
-+int kdbus_test_name_queue(struct kdbus_test_env *env);
-+int kdbus_test_name_takeover(struct kdbus_test_env *env);
-+int kdbus_test_policy(struct kdbus_test_env *env);
-+int kdbus_test_policy_ns(struct kdbus_test_env *env);
-+int kdbus_test_policy_priv(struct kdbus_test_env *env);
-+int kdbus_test_sync_byebye(struct kdbus_test_env *env);
-+int kdbus_test_sync_reply(struct kdbus_test_env *env);
-+int kdbus_test_timeout(struct kdbus_test_env *env);
-+int kdbus_test_writable_pool(struct kdbus_test_env *env);
-+
-+#endif /* _TEST_KDBUS_H_ */
-diff --git a/tools/testing/selftests/kdbus/kdbus-util.c b/tools/testing/selftests/kdbus/kdbus-util.c
-new file mode 100644
-index 0000000..82fa89b
---- /dev/null
-+++ b/tools/testing/selftests/kdbus/kdbus-util.c
-@@ -0,0 +1,1612 @@
-+/*
-+ * Copyright (C) 2013-2015 Daniel Mack
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2014-2015 Djalal Harouni
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#include <stdio.h>
-+#include <stdarg.h>
-+#include <string.h>
-+#include <time.h>
-+#include <inttypes.h>
-+#include <fcntl.h>
-+#include <stdlib.h>
-+#include <stddef.h>
-+#include <unistd.h>
-+#include <stdint.h>
-+#include <stdbool.h>
-+#include <errno.h>
-+#include <assert.h>
-+#include <poll.h>
-+#include <grp.h>
-+#include <sys/capability.h>
-+#include <sys/mman.h>
-+#include <sys/stat.h>
-+#include <sys/time.h>
-+#include <linux/unistd.h>
-+#include <linux/memfd.h>
-+
-+#ifndef __NR_memfd_create
-+  #ifdef __x86_64__
-+    #define __NR_memfd_create 319
-+  #elif defined __arm__
-+    #define __NR_memfd_create 385
-+  #else
-+    #define __NR_memfd_create 356
-+  #endif
-+#endif
-+
-+#include "kdbus-api.h"
-+#include "kdbus-util.h"
-+#include "kdbus-enum.h"
-+
-+#ifndef F_ADD_SEALS
-+#define F_LINUX_SPECIFIC_BASE	1024
-+#define F_ADD_SEALS     (F_LINUX_SPECIFIC_BASE + 9)
-+#define F_GET_SEALS     (F_LINUX_SPECIFIC_BASE + 10)
-+
-+#define F_SEAL_SEAL     0x0001  /* prevent further seals from being set */
-+#define F_SEAL_SHRINK   0x0002  /* prevent file from shrinking */
-+#define F_SEAL_GROW     0x0004  /* prevent file from growing */
-+#define F_SEAL_WRITE    0x0008  /* prevent writes */
-+#endif
-+
-+int kdbus_util_verbose = true;
-+
-+int kdbus_sysfs_get_parameter_mask(const char *path, uint64_t *mask)
-+{
-+	int ret;
-+	FILE *file;
-+	unsigned long long value;
-+
-+	file = fopen(path, "r");
-+	if (!file) {
-+		ret = -errno;
-+		kdbus_printf("--- error fopen(): %d (%m)\n", ret);
-+		return ret;
-+	}
-+
-+	ret = fscanf(file, "%llu", &value);
-+	if (ret != 1) {
-+		if (ferror(file))
-+			ret = -errno;
-+		else
-+			ret = -EIO;
-+
-+		kdbus_printf("--- error fscanf(): %d\n", ret);
-+		fclose(file);
-+		return ret;
-+	}
-+
-+	*mask = (uint64_t)value;
-+
-+	fclose(file);
-+
-+	return 0;
-+}
-+
-+int kdbus_sysfs_set_parameter_mask(const char *path, uint64_t mask)
-+{
-+	int ret;
-+	FILE *file;
-+
-+	file = fopen(path, "w");
-+	if (!file) {
-+		ret = -errno;
-+		kdbus_printf("--- error open(): %d (%m)\n", ret);
-+		return ret;
-+	}
-+
-+	ret = fprintf(file, "%llu", (unsigned long long)mask);
-+	if (ret <= 0) {
-+		ret = -EIO;
-+		kdbus_printf("--- error fprintf(): %d\n", ret);
-+	}
-+
-+	fclose(file);
-+
-+	return ret > 0 ? 0 : ret;
-+}
-+
-+int kdbus_create_bus(int control_fd, const char *name,
-+		     uint64_t owner_meta, char **path)
-+{
-+	struct {
-+		struct kdbus_cmd cmd;
-+
-+		/* bloom size item */
-+		struct {
-+			uint64_t size;
-+			uint64_t type;
-+			struct kdbus_bloom_parameter bloom;
-+		} bp;
-+
-+		/* owner metadata items */
-+		struct {
-+			uint64_t size;
-+			uint64_t type;
-+			uint64_t flags;
-+		} attach;
-+
-+		/* name item */
-+		struct {
-+			uint64_t size;
-+			uint64_t type;
-+			char str[64];
-+		} name;
-+	} bus_make;
-+	int ret;
-+
-+	memset(&bus_make, 0, sizeof(bus_make));
-+	bus_make.bp.size = sizeof(bus_make.bp);
-+	bus_make.bp.type = KDBUS_ITEM_BLOOM_PARAMETER;
-+	bus_make.bp.bloom.size = 64;
-+	bus_make.bp.bloom.n_hash = 1;
-+
-+	snprintf(bus_make.name.str, sizeof(bus_make.name.str),
-+		 "%u-%s", getuid(), name);
-+
-+	bus_make.attach.type = KDBUS_ITEM_ATTACH_FLAGS_SEND;
-+	bus_make.attach.size = sizeof(bus_make.attach);
-+	bus_make.attach.flags = owner_meta;
-+
-+	bus_make.name.type = KDBUS_ITEM_MAKE_NAME;
-+	bus_make.name.size = KDBUS_ITEM_HEADER_SIZE +
-+			     strlen(bus_make.name.str) + 1;
-+
-+	bus_make.cmd.flags = KDBUS_MAKE_ACCESS_WORLD;
-+	bus_make.cmd.size = sizeof(bus_make.cmd) +
-+			     bus_make.bp.size +
-+			     bus_make.attach.size +
-+			     bus_make.name.size;
-+
-+	kdbus_printf("Creating bus with name >%s< on control fd %d ...\n",
-+		     name, control_fd);
-+
-+	ret = kdbus_cmd_bus_make(control_fd, &bus_make.cmd);
-+	if (ret < 0) {
-+		kdbus_printf("--- error when making bus: %d (%m)\n", ret);
-+		return ret;
-+	}
-+
-+	if (ret == 0 && path)
-+		*path = strdup(bus_make.name.str);
-+
-+	return ret;
-+}
-+
-+struct kdbus_conn *
-+kdbus_hello(const char *path, uint64_t flags,
-+	    const struct kdbus_item *item, size_t item_size)
-+{
-+	struct kdbus_cmd_free cmd_free = {};
-+	int fd, ret;
-+	struct {
-+		struct kdbus_cmd_hello hello;
-+
-+		struct {
-+			uint64_t size;
-+			uint64_t type;
-+			char str[16];
-+		} conn_name;
-+
-+		uint8_t extra_items[item_size];
-+	} h;
-+	struct kdbus_conn *conn;
-+
-+	memset(&h, 0, sizeof(h));
-+
-+	if (item_size > 0)
-+		memcpy(h.extra_items, item, item_size);
-+
-+	kdbus_printf("-- opening bus connection %s\n", path);
-+	fd = open(path, O_RDWR|O_CLOEXEC);
-+	if (fd < 0) {
-+		kdbus_printf("--- error %d (%m)\n", fd);
-+		return NULL;
-+	}
-+
-+	h.hello.flags = flags | KDBUS_HELLO_ACCEPT_FD;
-+	h.hello.attach_flags_send = _KDBUS_ATTACH_ALL;
-+	h.hello.attach_flags_recv = _KDBUS_ATTACH_ALL;
-+	h.conn_name.type = KDBUS_ITEM_CONN_DESCRIPTION;
-+	strcpy(h.conn_name.str, "this-is-my-name");
-+	h.conn_name.size = KDBUS_ITEM_HEADER_SIZE + strlen(h.conn_name.str) + 1;
-+
-+	h.hello.size = sizeof(h);
-+	h.hello.pool_size = POOL_SIZE;
-+
-+	ret = kdbus_cmd_hello(fd, (struct kdbus_cmd_hello *) &h.hello);
-+	if (ret < 0) {
-+		kdbus_printf("--- error when saying hello: %d (%m)\n", ret);
-+		return NULL;
-+	}
-+	kdbus_printf("-- Our peer ID for %s: %llu -- bus uuid: '%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x'\n",
-+		     path, (unsigned long long)h.hello.id,
-+		     h.hello.id128[0],  h.hello.id128[1],  h.hello.id128[2],
-+		     h.hello.id128[3],  h.hello.id128[4],  h.hello.id128[5],
-+		     h.hello.id128[6],  h.hello.id128[7],  h.hello.id128[8],
-+		     h.hello.id128[9],  h.hello.id128[10], h.hello.id128[11],
-+		     h.hello.id128[12], h.hello.id128[13], h.hello.id128[14],
-+		     h.hello.id128[15]);
-+
-+	cmd_free.size = sizeof(cmd_free);
-+	cmd_free.offset = h.hello.offset;
-+	kdbus_cmd_free(fd, &cmd_free);
-+
-+	conn = malloc(sizeof(*conn));
-+	if (!conn) {
-+		kdbus_printf("unable to malloc()!?\n");
-+		return NULL;
-+	}
-+
-+	conn->buf = mmap(NULL, POOL_SIZE, PROT_READ, MAP_SHARED, fd, 0);
-+	if (conn->buf == MAP_FAILED) {
-+		free(conn);
-+		close(fd);
-+		kdbus_printf("--- error mmap (%m)\n");
-+		return NULL;
-+	}
-+
-+	conn->fd = fd;
-+	conn->id = h.hello.id;
-+	return conn;
-+}
-+
-+struct kdbus_conn *
-+kdbus_hello_registrar(const char *path, const char *name,
-+		      const struct kdbus_policy_access *access,
-+		      size_t num_access, uint64_t flags)
-+{
-+	struct kdbus_item *item, *items;
-+	size_t i, size;
-+
-+	size = KDBUS_ITEM_SIZE(strlen(name) + 1) +
-+		num_access * KDBUS_ITEM_SIZE(sizeof(*access));
-+
-+	items = alloca(size);
-+
-+	item = items;
-+	item->size = KDBUS_ITEM_HEADER_SIZE + strlen(name) + 1;
-+	item->type = KDBUS_ITEM_NAME;
-+	strcpy(item->str, name);
-+	item = KDBUS_ITEM_NEXT(item);
-+
-+	for (i = 0; i < num_access; i++) {
-+		item->size = KDBUS_ITEM_HEADER_SIZE +
-+			     sizeof(struct kdbus_policy_access);
-+		item->type = KDBUS_ITEM_POLICY_ACCESS;
-+
-+		item->policy_access.type = access[i].type;
-+		item->policy_access.access = access[i].access;
-+		item->policy_access.id = access[i].id;
-+
-+		item = KDBUS_ITEM_NEXT(item);
-+	}
-+
-+	return kdbus_hello(path, flags, items, size);
-+}
-+
-+struct kdbus_conn *kdbus_hello_activator(const char *path, const char *name,
-+				   const struct kdbus_policy_access *access,
-+				   size_t num_access)
-+{
-+	return kdbus_hello_registrar(path, name, access, num_access,
-+				     KDBUS_HELLO_ACTIVATOR);
-+}
-+
-+bool kdbus_item_in_message(struct kdbus_msg *msg, uint64_t type)
-+{
-+	const struct kdbus_item *item;
-+
-+	KDBUS_ITEM_FOREACH(item, msg, items)
-+		if (item->type == type)
-+			return true;
-+
-+	return false;
-+}
-+
-+int kdbus_bus_creator_info(struct kdbus_conn *conn,
-+			   uint64_t flags,
-+			   uint64_t *offset)
-+{
-+	struct kdbus_cmd_info *cmd;
-+	size_t size = sizeof(*cmd);
-+	int ret;
-+
-+	cmd = alloca(size);
-+	memset(cmd, 0, size);
-+	cmd->size = size;
-+	cmd->attach_flags = flags;
-+
-+	ret = kdbus_cmd_bus_creator_info(conn->fd, cmd);
-+	if (ret < 0) {
-+		kdbus_printf("--- error when requesting info: %d (%m)\n", ret);
-+		return ret;
-+	}
-+
-+	if (offset)
-+		*offset = cmd->offset;
-+	else
-+		kdbus_free(conn, cmd->offset);
-+
-+	return 0;
-+}
-+
-+int kdbus_conn_info(struct kdbus_conn *conn, uint64_t id,
-+		    const char *name, uint64_t flags,
-+		    uint64_t *offset)
-+{
-+	struct kdbus_cmd_info *cmd;
-+	size_t size = sizeof(*cmd);
-+	struct kdbus_info *info;
-+	int ret;
-+
-+	if (name)
-+		size += KDBUS_ITEM_HEADER_SIZE + strlen(name) + 1;
-+
-+	cmd = alloca(size);
-+	memset(cmd, 0, size);
-+	cmd->size = size;
-+	cmd->attach_flags = flags;
-+
-+	if (name) {
-+		cmd->items[0].size = KDBUS_ITEM_HEADER_SIZE + strlen(name) + 1;
-+		cmd->items[0].type = KDBUS_ITEM_NAME;
-+		strcpy(cmd->items[0].str, name);
-+	} else {
-+		cmd->id = id;
-+	}
-+
-+	ret = kdbus_cmd_conn_info(conn->fd, cmd);
-+	if (ret < 0) {
-+		kdbus_printf("--- error when requesting info: %d (%m)\n", ret);
-+		return ret;
-+	}
-+
-+	info = (struct kdbus_info *) (conn->buf + cmd->offset);
-+	if (info->size != cmd->info_size) {
-+		kdbus_printf("%s(): size mismatch: %d != %d\n", __func__,
-+				(int) info->size, (int) cmd->info_size);
-+		return -EIO;
-+	}
-+
-+	if (offset)
-+		*offset = cmd->offset;
-+	else
-+		kdbus_free(conn, cmd->offset);
-+
-+	return 0;
-+}
-+
-+void kdbus_conn_free(struct kdbus_conn *conn)
-+{
-+	if (!conn)
-+		return;
-+
-+	if (conn->buf)
-+		munmap(conn->buf, POOL_SIZE);
-+
-+	if (conn->fd >= 0)
-+		close(conn->fd);
-+
-+	free(conn);
-+}
-+
-+int sys_memfd_create(const char *name, __u64 size)
-+{
-+	int ret, fd;
-+
-+	fd = syscall(__NR_memfd_create, name, MFD_ALLOW_SEALING);
-+	if (fd < 0)
-+		return fd;
-+
-+	ret = ftruncate(fd, size);
-+	if (ret < 0) {
-+		close(fd);
-+		return ret;
-+	}
-+
-+	return fd;
-+}
-+
-+int sys_memfd_seal_set(int fd)
-+{
-+	return fcntl(fd, F_ADD_SEALS, F_SEAL_SHRINK |
-+			 F_SEAL_GROW | F_SEAL_WRITE | F_SEAL_SEAL);
-+}
-+
-+off_t sys_memfd_get_size(int fd, off_t *size)
-+{
-+	struct stat stat;
-+	int ret;
-+
-+	ret = fstat(fd, &stat);
-+	if (ret < 0) {
-+		kdbus_printf("stat() failed: %m\n");
-+		return ret;
-+	}
-+
-+	*size = stat.st_size;
-+	return 0;
-+}
-+
-+static int __kdbus_msg_send(const struct kdbus_conn *conn,
-+			    const char *name,
-+			    uint64_t cookie,
-+			    uint64_t flags,
-+			    uint64_t timeout,
-+			    int64_t priority,
-+			    uint64_t dst_id,
-+			    uint64_t cmd_flags,
-+			    int cancel_fd)
-+{
-+	struct kdbus_cmd_send *cmd = NULL;
-+	struct kdbus_msg *msg = NULL;
-+	const char ref1[1024 * 128 + 3] = "0123456789_0";
-+	const char ref2[] = "0123456789_1";
-+	struct kdbus_item *item;
-+	struct timespec now;
-+	uint64_t size;
-+	int memfd = -1;
-+	int ret;
-+
-+	size = sizeof(*msg) + 3 * KDBUS_ITEM_SIZE(sizeof(struct kdbus_vec));
-+
-+	if (dst_id == KDBUS_DST_ID_BROADCAST)
-+		size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_bloom_filter)) + 64;
-+	else {
-+		memfd = sys_memfd_create("my-name-is-nice", 1024 * 1024);
-+		if (memfd < 0) {
-+			kdbus_printf("failed to create memfd: %m\n");
-+			return memfd;
-+		}
-+
-+		if (write(memfd, "kdbus memfd 1234567", 19) != 19) {
-+			ret = -errno;
-+			kdbus_printf("writing to memfd failed: %m\n");
-+			goto out;
-+		}
-+
-+		ret = sys_memfd_seal_set(memfd);
-+		if (ret < 0) {
-+			ret = -errno;
-+			kdbus_printf("memfd sealing failed: %m\n");
-+			goto out;
-+		}
-+
-+		size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_memfd));
-+	}
-+
-+	if (name)
-+		size += KDBUS_ITEM_SIZE(strlen(name) + 1);
-+
-+	msg = malloc(size);
-+	if (!msg) {
-+		ret = -errno;
-+		kdbus_printf("unable to malloc()!?\n");
-+		goto out;
-+	}
-+
-+	if (dst_id == KDBUS_DST_ID_BROADCAST)
-+		flags |= KDBUS_MSG_SIGNAL;
-+
-+	memset(msg, 0, size);
-+	msg->flags = flags;
-+	msg->priority = priority;
-+	msg->size = size;
-+	msg->src_id = conn->id;
-+	msg->dst_id = name ? 0 : dst_id;
-+	msg->cookie = cookie;
-+	msg->payload_type = KDBUS_PAYLOAD_DBUS;
-+
-+	if (timeout) {
-+		ret = clock_gettime(CLOCK_MONOTONIC_COARSE, &now);
-+		if (ret < 0)
-+			goto out;
-+
-+		msg->timeout_ns = now.tv_sec * 1000000000ULL +
-+				  now.tv_nsec + timeout;
-+	}
-+
-+	item = msg->items;
-+
-+	if (name) {
-+		item->type = KDBUS_ITEM_DST_NAME;
-+		item->size = KDBUS_ITEM_HEADER_SIZE + strlen(name) + 1;
-+		strcpy(item->str, name);
-+		item = KDBUS_ITEM_NEXT(item);
-+	}
-+
-+	item->type = KDBUS_ITEM_PAYLOAD_VEC;
-+	item->size = KDBUS_ITEM_HEADER_SIZE + sizeof(struct kdbus_vec);
-+	item->vec.address = (uintptr_t)&ref1;
-+	item->vec.size = sizeof(ref1);
-+	item = KDBUS_ITEM_NEXT(item);
-+
-+	/* data padding for ref1 */
-+	item->type = KDBUS_ITEM_PAYLOAD_VEC;
-+	item->size = KDBUS_ITEM_HEADER_SIZE + sizeof(struct kdbus_vec);
-+	item->vec.address = (uintptr_t)NULL;
-+	item->vec.size =  KDBUS_ALIGN8(sizeof(ref1)) - sizeof(ref1);
-+	item = KDBUS_ITEM_NEXT(item);
-+
-+	item->type = KDBUS_ITEM_PAYLOAD_VEC;
-+	item->size = KDBUS_ITEM_HEADER_SIZE + sizeof(struct kdbus_vec);
-+	item->vec.address = (uintptr_t)&ref2;
-+	item->vec.size = sizeof(ref2);
-+	item = KDBUS_ITEM_NEXT(item);
-+
-+	if (dst_id == KDBUS_DST_ID_BROADCAST) {
-+		item->type = KDBUS_ITEM_BLOOM_FILTER;
-+		item->size = KDBUS_ITEM_SIZE(sizeof(struct kdbus_bloom_filter)) + 64;
-+		item->bloom_filter.generation = 0;
-+	} else {
-+		item->type = KDBUS_ITEM_PAYLOAD_MEMFD;
-+		item->size = KDBUS_ITEM_HEADER_SIZE + sizeof(struct kdbus_memfd);
-+		item->memfd.size = 16;
-+		item->memfd.fd = memfd;
-+	}
-+	item = KDBUS_ITEM_NEXT(item);
-+
-+	size = sizeof(*cmd);
-+	if (cancel_fd != -1)
-+		size += KDBUS_ITEM_SIZE(sizeof(cancel_fd));
-+
-+	cmd = malloc(size);
-+	if (!cmd) {
-+		ret = -errno;
-+		kdbus_printf("unable to malloc()!?\n");
-+		goto out;
-+	}
-+
-+	cmd->size = size;
-+	cmd->flags = cmd_flags;
-+	cmd->msg_address = (uintptr_t)msg;
-+
-+	item = cmd->items;
-+
-+	if (cancel_fd != -1) {
-+		item->type = KDBUS_ITEM_CANCEL_FD;
-+		item->size = KDBUS_ITEM_HEADER_SIZE + sizeof(cancel_fd);
-+		item->fds[0] = cancel_fd;
-+		item = KDBUS_ITEM_NEXT(item);
-+	}
-+
-+	ret = kdbus_cmd_send(conn->fd, cmd);
-+	if (ret < 0) {
-+		kdbus_printf("error sending message: %d (%m)\n", ret);
-+		goto out;
-+	}
-+
-+	if (cmd_flags & KDBUS_SEND_SYNC_REPLY) {
-+		struct kdbus_msg *reply;
-+
-+		kdbus_printf("SYNC REPLY @offset %llu:\n", cmd->reply.offset);
-+		reply = (struct kdbus_msg *)(conn->buf + cmd->reply.offset);
-+		kdbus_msg_dump(conn, reply);
-+
-+		kdbus_msg_free(reply);
-+
-+		ret = kdbus_free(conn, cmd->reply.offset);
-+		if (ret < 0)
-+			goto out;
-+	}
-+
-+out:
-+	free(msg);
-+	free(cmd);
-+
-+	if (memfd >= 0)
-+		close(memfd);
-+
-+	return ret < 0 ? ret : 0;
-+}
-+
-+int kdbus_msg_send(const struct kdbus_conn *conn, const char *name,
-+		   uint64_t cookie, uint64_t flags, uint64_t timeout,
-+		   int64_t priority, uint64_t dst_id)
-+{
-+	return __kdbus_msg_send(conn, name, cookie, flags, timeout, priority,
-+				dst_id, 0, -1);
-+}
-+
-+int kdbus_msg_send_sync(const struct kdbus_conn *conn, const char *name,
-+			uint64_t cookie, uint64_t flags, uint64_t timeout,
-+			int64_t priority, uint64_t dst_id, int cancel_fd)
-+{
-+	return __kdbus_msg_send(conn, name, cookie, flags, timeout, priority,
-+				dst_id, KDBUS_SEND_SYNC_REPLY, cancel_fd);
-+}
-+
-+int kdbus_msg_send_reply(const struct kdbus_conn *conn,
-+			 uint64_t reply_cookie,
-+			 uint64_t dst_id)
-+{
-+	struct kdbus_cmd_send cmd = {};
-+	struct kdbus_msg *msg;
-+	const char ref1[1024 * 128 + 3] = "0123456789_0";
-+	struct kdbus_item *item;
-+	uint64_t size;
-+	int ret;
-+
-+	size = sizeof(struct kdbus_msg);
-+	size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_vec));
-+
-+	msg = malloc(size);
-+	if (!msg) {
-+		kdbus_printf("unable to malloc()!?\n");
-+		return -ENOMEM;
-+	}
-+
-+	memset(msg, 0, size);
-+	msg->size = size;
-+	msg->src_id = conn->id;
-+	msg->dst_id = dst_id;
-+	msg->cookie_reply = reply_cookie;
-+	msg->payload_type = KDBUS_PAYLOAD_DBUS;
-+
-+	item = msg->items;
-+
-+	item->type = KDBUS_ITEM_PAYLOAD_VEC;
-+	item->size = KDBUS_ITEM_HEADER_SIZE + sizeof(struct kdbus_vec);
-+	item->vec.address = (uintptr_t)&ref1;
-+	item->vec.size = sizeof(ref1);
-+	item = KDBUS_ITEM_NEXT(item);
-+
-+	cmd.size = sizeof(cmd);
-+	cmd.msg_address = (uintptr_t)msg;
-+
-+	ret = kdbus_cmd_send(conn->fd, &cmd);
-+	if (ret < 0)
-+		kdbus_printf("error sending message: %d (%m)\n", ret);
-+
-+	free(msg);
-+
-+	return ret;
-+}
-+
-+static char *msg_id(uint64_t id, char *buf)
-+{
-+	if (id == 0)
-+		return "KERNEL";
-+	if (id == ~0ULL)
-+		return "BROADCAST";
-+	sprintf(buf, "%llu", (unsigned long long)id);
-+	return buf;
-+}
-+
-+int kdbus_msg_dump(const struct kdbus_conn *conn, const struct kdbus_msg *msg)
-+{
-+	const struct kdbus_item *item = msg->items;
-+	char buf_src[32];
-+	char buf_dst[32];
-+	uint64_t timeout = 0;
-+	uint64_t cookie_reply = 0;
-+	int ret = 0;
-+
-+	if (msg->flags & KDBUS_MSG_EXPECT_REPLY)
-+		timeout = msg->timeout_ns;
-+	else
-+		cookie_reply = msg->cookie_reply;
-+
-+	kdbus_printf("MESSAGE: %s (%llu bytes) flags=0x%08llx, %s → %s, "
-+		     "cookie=%llu, timeout=%llu cookie_reply=%llu priority=%lli\n",
-+		enum_PAYLOAD(msg->payload_type), (unsigned long long)msg->size,
-+		(unsigned long long)msg->flags,
-+		msg_id(msg->src_id, buf_src), msg_id(msg->dst_id, buf_dst),
-+		(unsigned long long)msg->cookie, (unsigned long long)timeout,
-+		(unsigned long long)cookie_reply, (long long)msg->priority);
-+
-+	KDBUS_ITEM_FOREACH(item, msg, items) {
-+		if (item->size < KDBUS_ITEM_HEADER_SIZE) {
-+			kdbus_printf("  +%s (%llu bytes) invalid data record\n",
-+				     enum_MSG(item->type), item->size);
-+			ret = -EINVAL;
-+			break;
-+		}
-+
-+		switch (item->type) {
-+		case KDBUS_ITEM_PAYLOAD_OFF: {
-+			char *s;
-+
-+			if (item->vec.offset == ~0ULL)
-+				s = "[\\0-bytes]";
-+			else
-+				s = (char *)msg + item->vec.offset;
-+
-+			kdbus_printf("  +%s (%llu bytes) off=%llu size=%llu '%s'\n",
-+			       enum_MSG(item->type), item->size,
-+			       (unsigned long long)item->vec.offset,
-+			       (unsigned long long)item->vec.size, s);
-+			break;
-+		}
-+
-+		case KDBUS_ITEM_FDS: {
-+			int i, n = (item->size - KDBUS_ITEM_HEADER_SIZE) /
-+					sizeof(int);
-+
-+			kdbus_printf("  +%s (%llu bytes, %d fds)\n",
-+			       enum_MSG(item->type), item->size, n);
-+
-+			for (i = 0; i < n; i++)
-+				kdbus_printf("    fd[%d] = %d\n",
-+					     i, item->fds[i]);
-+
-+			break;
-+		}
-+
-+		case KDBUS_ITEM_PAYLOAD_MEMFD: {
-+			char *buf;
-+			off_t size;
-+
-+			buf = mmap(NULL, item->memfd.size, PROT_READ,
-+				   MAP_PRIVATE, item->memfd.fd, 0);
-+			if (buf == MAP_FAILED) {
-+				kdbus_printf("mmap() fd=%i size=%llu failed: %m\n",
-+					     item->memfd.fd, item->memfd.size);
-+				break;
-+			}
-+
-+			if (sys_memfd_get_size(item->memfd.fd, &size) < 0) {
-+				kdbus_printf("KDBUS_CMD_MEMFD_SIZE_GET failed: %m\n");
-+				break;
-+			}
-+
-+			kdbus_printf("  +%s (%llu bytes) fd=%i size=%llu filesize=%llu '%s'\n",
-+			       enum_MSG(item->type), item->size, item->memfd.fd,
-+			       (unsigned long long)item->memfd.size,
-+			       (unsigned long long)size, buf);
-+			munmap(buf, item->memfd.size);
-+			break;
-+		}
-+
-+		case KDBUS_ITEM_CREDS:
-+			kdbus_printf("  +%s (%llu bytes) uid=%lld, euid=%lld, suid=%lld, fsuid=%lld, "
-+							"gid=%lld, egid=%lld, sgid=%lld, fsgid=%lld\n",
-+				enum_MSG(item->type), item->size,
-+				item->creds.uid, item->creds.euid,
-+				item->creds.suid, item->creds.fsuid,
-+				item->creds.gid, item->creds.egid,
-+				item->creds.sgid, item->creds.fsgid);
-+			break;
-+
-+		case KDBUS_ITEM_PIDS:
-+			kdbus_printf("  +%s (%llu bytes) pid=%lld, tid=%lld, ppid=%lld\n",
-+				enum_MSG(item->type), item->size,
-+				item->pids.pid, item->pids.tid,
-+				item->pids.ppid);
-+			break;
-+
-+		case KDBUS_ITEM_AUXGROUPS: {
-+			int i, n;
-+
-+			kdbus_printf("  +%s (%llu bytes)\n",
-+				     enum_MSG(item->type), item->size);
-+			n = (item->size - KDBUS_ITEM_HEADER_SIZE) /
-+				sizeof(uint64_t);
-+
-+			for (i = 0; i < n; i++)
-+				kdbus_printf("    gid[%d] = %lld\n",
-+					     i, item->data64[i]);
-+			break;
-+		}
-+
-+		case KDBUS_ITEM_NAME:
-+		case KDBUS_ITEM_PID_COMM:
-+		case KDBUS_ITEM_TID_COMM:
-+		case KDBUS_ITEM_EXE:
-+		case KDBUS_ITEM_CGROUP:
-+		case KDBUS_ITEM_SECLABEL:
-+		case KDBUS_ITEM_DST_NAME:
-+		case KDBUS_ITEM_CONN_DESCRIPTION:
-+			kdbus_printf("  +%s (%llu bytes) '%s' (%zu)\n",
-+				     enum_MSG(item->type), item->size,
-+				     item->str, strlen(item->str));
-+			break;
-+
-+		case KDBUS_ITEM_OWNED_NAME: {
-+			kdbus_printf("  +%s (%llu bytes) '%s' (%zu) flags=0x%08llx\n",
-+				     enum_MSG(item->type), item->size,
-+				     item->name.name, strlen(item->name.name),
-+				     item->name.flags);
-+			break;
-+		}
-+
-+		case KDBUS_ITEM_CMDLINE: {
-+			size_t size = item->size - KDBUS_ITEM_HEADER_SIZE;
-+			const char *str = item->str;
-+			int count = 0;
-+
-+			kdbus_printf("  +%s (%llu bytes) ",
-+				     enum_MSG(item->type), item->size);
-+			while (size) {
-+				kdbus_printf("'%s' ", str);
-+				size -= strlen(str) + 1;
-+				str += strlen(str) + 1;
-+				count++;
-+			}
-+
-+			kdbus_printf("(%d string%s)\n",
-+				     count, (count == 1) ? "" : "s");
-+			break;
-+		}
-+
-+		case KDBUS_ITEM_AUDIT:
-+			kdbus_printf("  +%s (%llu bytes) loginuid=%u sessionid=%u\n",
-+			       enum_MSG(item->type), item->size,
-+			       item->audit.loginuid, item->audit.sessionid);
-+			break;
-+
-+		case KDBUS_ITEM_CAPS: {
-+			const uint32_t *cap;
-+			int n, i;
-+
-+			kdbus_printf("  +%s (%llu bytes) len=%llu bytes, last_cap %d\n",
-+				     enum_MSG(item->type), item->size,
-+				     (unsigned long long)item->size -
-+					KDBUS_ITEM_HEADER_SIZE,
-+				     (int) item->caps.last_cap);
-+
-+			cap = item->caps.caps;
-+			n = (item->size - offsetof(struct kdbus_item, caps.caps))
-+				/ 4 / sizeof(uint32_t);
-+
-+			kdbus_printf("    CapInh=");
-+			for (i = 0; i < n; i++)
-+				kdbus_printf("%08x", cap[(0 * n) + (n - i - 1)]);
-+
-+			kdbus_printf(" CapPrm=");
-+			for (i = 0; i < n; i++)
-+				kdbus_printf("%08x", cap[(1 * n) + (n - i - 1)]);
-+
-+			kdbus_printf(" CapEff=");
-+			for (i = 0; i < n; i++)
-+				kdbus_printf("%08x", cap[(2 * n) + (n - i - 1)]);
-+
-+			kdbus_printf(" CapBnd=");
-+			for (i = 0; i < n; i++)
-+				kdbus_printf("%08x", cap[(3 * n) + (n - i - 1)]);
-+			kdbus_printf("\n");
-+			break;
-+		}
-+
-+		case KDBUS_ITEM_TIMESTAMP:
-+			kdbus_printf("  +%s (%llu bytes) seq=%llu realtime=%lluns monotonic=%lluns\n",
-+			       enum_MSG(item->type), item->size,
-+			       (unsigned long long)item->timestamp.seqnum,
-+			       (unsigned long long)item->timestamp.realtime_ns,
-+			       (unsigned long long)item->timestamp.monotonic_ns);
-+			break;
-+
-+		case KDBUS_ITEM_REPLY_TIMEOUT:
-+			kdbus_printf("  +%s (%llu bytes) cookie=%llu\n",
-+			       enum_MSG(item->type), item->size,
-+			       msg->cookie_reply);
-+			break;
-+
-+		case KDBUS_ITEM_NAME_ADD:
-+		case KDBUS_ITEM_NAME_REMOVE:
-+		case KDBUS_ITEM_NAME_CHANGE:
-+			kdbus_printf("  +%s (%llu bytes) '%s', old id=%lld, now id=%lld, old_flags=0x%llx new_flags=0x%llx\n",
-+				enum_MSG(item->type),
-+				(unsigned long long) item->size,
-+				item->name_change.name,
-+				item->name_change.old_id.id,
-+				item->name_change.new_id.id,
-+				item->name_change.old_id.flags,
-+				item->name_change.new_id.flags);
-+			break;
-+
-+		case KDBUS_ITEM_ID_ADD:
-+		case KDBUS_ITEM_ID_REMOVE:
-+			kdbus_printf("  +%s (%llu bytes) id=%llu flags=%llu\n",
-+			       enum_MSG(item->type),
-+			       (unsigned long long) item->size,
-+			       (unsigned long long) item->id_change.id,
-+			       (unsigned long long) item->id_change.flags);
-+			break;
-+
-+		default:
-+			kdbus_printf("  +%s (%llu bytes)\n",
-+				     enum_MSG(item->type), item->size);
-+			break;
-+		}
-+	}
-+
-+	if ((char *)item - ((char *)msg + msg->size) >= 8) {
-+		kdbus_printf("invalid padding at end of message\n");
-+		ret = -EINVAL;
-+	}
-+
-+	kdbus_printf("\n");
-+
-+	return ret;
-+}
-+
-+void kdbus_msg_free(struct kdbus_msg *msg)
-+{
-+	const struct kdbus_item *item;
-+	int nfds, i;
-+
-+	if (!msg)
-+		return;
-+
-+	KDBUS_ITEM_FOREACH(item, msg, items) {
-+		switch (item->type) {
-+		/* close all memfds */
-+		case KDBUS_ITEM_PAYLOAD_MEMFD:
-+			close(item->memfd.fd);
-+			break;
-+		case KDBUS_ITEM_FDS:
-+			nfds = (item->size - KDBUS_ITEM_HEADER_SIZE) /
-+				sizeof(int);
-+
-+			for (i = 0; i < nfds; i++)
-+				close(item->fds[i]);
-+
-+			break;
-+		}
-+	}
-+}
-+
-+int kdbus_msg_recv(struct kdbus_conn *conn,
-+		   struct kdbus_msg **msg_out,
-+		   uint64_t *offset)
-+{
-+	struct kdbus_cmd_recv recv = { .size = sizeof(recv) };
-+	struct kdbus_msg *msg;
-+	int ret;
-+
-+	ret = kdbus_cmd_recv(conn->fd, &recv);
-+	if (ret < 0)
-+		return ret;
-+
-+	msg = (struct kdbus_msg *)(conn->buf + recv.msg.offset);
-+	ret = kdbus_msg_dump(conn, msg);
-+	if (ret < 0) {
-+		kdbus_msg_free(msg);
-+		return ret;
-+	}
-+
-+	if (msg_out) {
-+		*msg_out = msg;
-+
-+		if (offset)
-+			*offset = recv.msg.offset;
-+	} else {
-+		kdbus_msg_free(msg);
-+
-+		ret = kdbus_free(conn, recv.msg.offset);
-+		if (ret < 0)
-+			return ret;
-+	}
-+
-+	return 0;
-+}
-+
-+/*
-+ * Returns: 0 on success, negative errno on failure.
-+ *
-+ * We must return -ETIMEDOUT, -ECONNREST, -EAGAIN and other errors.
-+ * We must return the result of kdbus_msg_recv()
-+ */
-+int kdbus_msg_recv_poll(struct kdbus_conn *conn,
-+			int timeout_ms,
-+			struct kdbus_msg **msg_out,
-+			uint64_t *offset)
-+{
-+	int ret;
-+
-+	do {
-+		struct timeval before, after, diff;
-+		struct pollfd fd;
-+
-+		fd.fd = conn->fd;
-+		fd.events = POLLIN | POLLPRI | POLLHUP;
-+		fd.revents = 0;
-+
-+		gettimeofday(&before, NULL);
-+		ret = poll(&fd, 1, timeout_ms);
-+		gettimeofday(&after, NULL);
-+
-+		if (ret == 0) {
-+			ret = -ETIMEDOUT;
-+			break;
-+		}
-+
-+		if (ret > 0) {
-+			if (fd.revents & POLLIN)
-+				ret = kdbus_msg_recv(conn, msg_out, offset);
-+
-+			if (fd.revents & (POLLHUP | POLLERR))
-+				ret = -ECONNRESET;
-+		}
-+
-+		if (ret == 0 || ret != -EAGAIN)
-+			break;
-+
-+		timersub(&after, &before, &diff);
-+		timeout_ms -= diff.tv_sec * 1000UL +
-+			      diff.tv_usec / 1000UL;
-+	} while (timeout_ms > 0);
-+
-+	return ret;
-+}
-+
-+int kdbus_free(const struct kdbus_conn *conn, uint64_t offset)
-+{
-+	struct kdbus_cmd_free cmd_free = {};
-+	int ret;
-+
-+	cmd_free.size = sizeof(cmd_free);
-+	cmd_free.offset = offset;
-+	cmd_free.flags = 0;
-+
-+	ret = kdbus_cmd_free(conn->fd, &cmd_free);
-+	if (ret < 0) {
-+		kdbus_printf("KDBUS_CMD_FREE failed: %d (%m)\n", ret);
-+		return ret;
-+	}
-+
-+	return 0;
-+}
-+
-+int kdbus_name_acquire(struct kdbus_conn *conn,
-+		       const char *name, uint64_t *flags)
-+{
-+	struct kdbus_cmd *cmd_name;
-+	size_t name_len = strlen(name) + 1;
-+	uint64_t size = sizeof(*cmd_name) + KDBUS_ITEM_SIZE(name_len);
-+	struct kdbus_item *item;
-+	int ret;
-+
-+	cmd_name = alloca(size);
-+
-+	memset(cmd_name, 0, size);
-+
-+	item = cmd_name->items;
-+	item->size = KDBUS_ITEM_HEADER_SIZE + name_len;
-+	item->type = KDBUS_ITEM_NAME;
-+	strcpy(item->str, name);
-+
-+	cmd_name->size = size;
-+	if (flags)
-+		cmd_name->flags = *flags;
-+
-+	ret = kdbus_cmd_name_acquire(conn->fd, cmd_name);
-+	if (ret < 0) {
-+		kdbus_printf("error aquiring name: %s\n", strerror(-ret));
-+		return ret;
-+	}
-+
-+	kdbus_printf("%s(): flags after call: 0x%llx\n", __func__,
-+		     cmd_name->return_flags);
-+
-+	if (flags)
-+		*flags = cmd_name->return_flags;
-+
-+	return 0;
-+}
-+
-+int kdbus_name_release(struct kdbus_conn *conn, const char *name)
-+{
-+	struct kdbus_cmd *cmd_name;
-+	size_t name_len = strlen(name) + 1;
-+	uint64_t size = sizeof(*cmd_name) + KDBUS_ITEM_SIZE(name_len);
-+	struct kdbus_item *item;
-+	int ret;
-+
-+	cmd_name = alloca(size);
-+
-+	memset(cmd_name, 0, size);
-+
-+	item = cmd_name->items;
-+	item->size = KDBUS_ITEM_HEADER_SIZE + name_len;
-+	item->type = KDBUS_ITEM_NAME;
-+	strcpy(item->str, name);
-+
-+	cmd_name->size = size;
-+
-+	kdbus_printf("conn %lld giving up name '%s'\n",
-+		     (unsigned long long) conn->id, name);
-+
-+	ret = kdbus_cmd_name_release(conn->fd, cmd_name);
-+	if (ret < 0) {
-+		kdbus_printf("error releasing name: %s\n", strerror(-ret));
-+		return ret;
-+	}
-+
-+	return 0;
-+}
-+
-+int kdbus_list(struct kdbus_conn *conn, uint64_t flags)
-+{
-+	struct kdbus_cmd_list cmd_list = {};
-+	struct kdbus_info *list, *name;
-+	int ret;
-+
-+	cmd_list.size = sizeof(cmd_list);
-+	cmd_list.flags = flags;
-+
-+	ret = kdbus_cmd_list(conn->fd, &cmd_list);
-+	if (ret < 0) {
-+		kdbus_printf("error listing names: %d (%m)\n", ret);
-+		return ret;
-+	}
-+
-+	kdbus_printf("REGISTRY:\n");
-+	list = (struct kdbus_info *)(conn->buf + cmd_list.offset);
-+
-+	KDBUS_FOREACH(name, list, cmd_list.list_size) {
-+		uint64_t flags = 0;
-+		struct kdbus_item *item;
-+		const char *n = "MISSING-NAME";
-+
-+		if (name->size == sizeof(struct kdbus_cmd))
-+			continue;
-+
-+		KDBUS_ITEM_FOREACH(item, name, items)
-+			if (item->type == KDBUS_ITEM_OWNED_NAME) {
-+				n = item->name.name;
-+				flags = item->name.flags;
-+
-+				kdbus_printf("%8llu flags=0x%08llx conn=0x%08llx '%s'\n",
-+					     name->id,
-+					     (unsigned long long) flags,
-+					     name->flags, n);
-+			}
-+	}
-+	kdbus_printf("\n");
-+
-+	ret = kdbus_free(conn, cmd_list.offset);
-+
-+	return ret;
-+}
-+
-+int kdbus_conn_update_attach_flags(struct kdbus_conn *conn,
-+				   uint64_t attach_flags_send,
-+				   uint64_t attach_flags_recv)
-+{
-+	int ret;
-+	size_t size;
-+	struct kdbus_cmd *update;
-+	struct kdbus_item *item;
-+
-+	size = sizeof(struct kdbus_cmd);
-+	size += KDBUS_ITEM_SIZE(sizeof(uint64_t)) * 2;
-+
-+	update = malloc(size);
-+	if (!update) {
-+		kdbus_printf("error malloc: %m\n");
-+		return -ENOMEM;
-+	}
-+
-+	memset(update, 0, size);
-+	update->size = size;
-+
-+	item = update->items;
-+
-+	item->type = KDBUS_ITEM_ATTACH_FLAGS_SEND;
-+	item->size = KDBUS_ITEM_HEADER_SIZE + sizeof(uint64_t);
-+	item->data64[0] = attach_flags_send;
-+	item = KDBUS_ITEM_NEXT(item);
-+
-+	item->type = KDBUS_ITEM_ATTACH_FLAGS_RECV;
-+	item->size = KDBUS_ITEM_HEADER_SIZE + sizeof(uint64_t);
-+	item->data64[0] = attach_flags_recv;
-+	item = KDBUS_ITEM_NEXT(item);
-+
-+	ret = kdbus_cmd_update(conn->fd, update);
-+	if (ret < 0)
-+		kdbus_printf("error conn update: %d (%m)\n", ret);
-+
-+	free(update);
-+
-+	return ret;
-+}
-+
-+int kdbus_conn_update_policy(struct kdbus_conn *conn, const char *name,
-+			     const struct kdbus_policy_access *access,
-+			     size_t num_access)
-+{
-+	struct kdbus_cmd *update;
-+	struct kdbus_item *item;
-+	size_t i, size;
-+	int ret;
-+
-+	size = sizeof(struct kdbus_cmd);
-+	size += KDBUS_ITEM_SIZE(strlen(name) + 1);
-+	size += num_access * KDBUS_ITEM_SIZE(sizeof(struct kdbus_policy_access));
-+
-+	update = malloc(size);
-+	if (!update) {
-+		kdbus_printf("error malloc: %m\n");
-+		return -ENOMEM;
-+	}
-+
-+	memset(update, 0, size);
-+	update->size = size;
-+
-+	item = update->items;
-+
-+	item->type = KDBUS_ITEM_NAME;
-+	item->size = KDBUS_ITEM_HEADER_SIZE + strlen(name) + 1;
-+	strcpy(item->str, name);
-+	item = KDBUS_ITEM_NEXT(item);
-+
-+	for (i = 0; i < num_access; i++) {
-+		item->size = KDBUS_ITEM_HEADER_SIZE +
-+			     sizeof(struct kdbus_policy_access);
-+		item->type = KDBUS_ITEM_POLICY_ACCESS;
-+
-+		item->policy_access.type = access[i].type;
-+		item->policy_access.access = access[i].access;
-+		item->policy_access.id = access[i].id;
-+
-+		item = KDBUS_ITEM_NEXT(item);
-+	}
-+
-+	ret = kdbus_cmd_update(conn->fd, update);
-+	if (ret < 0)
-+		kdbus_printf("error conn update: %d (%m)\n", ret);
-+
-+	free(update);
-+
-+	return ret;
-+}
-+
-+int kdbus_add_match_id(struct kdbus_conn *conn, uint64_t cookie,
-+		       uint64_t type, uint64_t id)
-+{
-+	struct {
-+		struct kdbus_cmd_match cmd;
-+		struct {
-+			uint64_t size;
-+			uint64_t type;
-+			struct kdbus_notify_id_change chg;
-+		} item;
-+	} buf;
-+	int ret;
-+
-+	memset(&buf, 0, sizeof(buf));
-+
-+	buf.cmd.size = sizeof(buf);
-+	buf.cmd.cookie = cookie;
-+	buf.item.size = sizeof(buf.item);
-+	buf.item.type = type;
-+	buf.item.chg.id = id;
-+
-+	ret = kdbus_cmd_match_add(conn->fd, &buf.cmd);
-+	if (ret < 0)
-+		kdbus_printf("--- error adding conn match: %d (%m)\n", ret);
-+
-+	return ret;
-+}
-+
-+int kdbus_add_match_empty(struct kdbus_conn *conn)
-+{
-+	struct {
-+		struct kdbus_cmd_match cmd;
-+		struct kdbus_item item;
-+	} buf;
-+	int ret;
-+
-+	memset(&buf, 0, sizeof(buf));
-+
-+	buf.item.size = sizeof(uint64_t) * 3;
-+	buf.item.type = KDBUS_ITEM_ID;
-+	buf.item.id = KDBUS_MATCH_ID_ANY;
-+
-+	buf.cmd.size = sizeof(buf.cmd) + buf.item.size;
-+
-+	ret = kdbus_cmd_match_add(conn->fd, &buf.cmd);
-+	if (ret < 0)
-+		kdbus_printf("--- error adding conn match: %d (%m)\n", ret);
-+
-+	return ret;
-+}
-+
-+static int all_ids_are_mapped(const char *path)
-+{
-+	int ret;
-+	FILE *file;
-+	uint32_t inside_id, length;
-+
-+	file = fopen(path, "r");
-+	if (!file) {
-+		ret = -errno;
-+		kdbus_printf("error fopen() %s: %d (%m)\n",
-+			     path, ret);
-+		return ret;
-+	}
-+
-+	ret = fscanf(file, "%u\t%*u\t%u", &inside_id, &length);
-+	if (ret != 2) {
-+		if (ferror(file))
-+			ret = -errno;
-+		else
-+			ret = -EIO;
-+
-+		kdbus_printf("--- error fscanf(): %d\n", ret);
-+		fclose(file);
-+		return ret;
-+	}
-+
-+	fclose(file);
-+
-+	/*
-+	 * If length is 4294967295 which means the invalid uid
-+	 * (uid_t) -1 then we are able to map all uid/gids
-+	 */
-+	if (inside_id == 0 && length == (uid_t) -1)
-+		return 1;
-+
-+	return 0;
-+}
-+
-+int all_uids_gids_are_mapped(void)
-+{
-+	int ret;
-+
-+	ret = all_ids_are_mapped("/proc/self/uid_map");
-+	if (ret <= 0) {
-+		kdbus_printf("--- error not all uids are mapped\n");
-+		return 0;
-+	}
-+
-+	ret = all_ids_are_mapped("/proc/self/gid_map");
-+	if (ret <= 0) {
-+		kdbus_printf("--- error not all gids are mapped\n");
-+		return 0;
-+	}
-+
-+	return 1;
-+}
-+
-+int drop_privileges(uid_t uid, gid_t gid)
-+{
-+	int ret;
-+
-+	ret = setgroups(0, NULL);
-+	if (ret < 0) {
-+		ret = -errno;
-+		kdbus_printf("error setgroups: %d (%m)\n", ret);
-+		return ret;
-+	}
-+
-+	ret = setresgid(gid, gid, gid);
-+	if (ret < 0) {
-+		ret = -errno;
-+		kdbus_printf("error setresgid: %d (%m)\n", ret);
-+		return ret;
-+	}
-+
-+	ret = setresuid(uid, uid, uid);
-+	if (ret < 0) {
-+		ret = -errno;
-+		kdbus_printf("error setresuid: %d (%m)\n", ret);
-+		return ret;
-+	}
-+
-+	return ret;
-+}
-+
-+uint64_t now(clockid_t clock)
-+{
-+	struct timespec spec;
-+
-+	clock_gettime(clock, &spec);
-+	return spec.tv_sec * 1000ULL * 1000ULL * 1000ULL + spec.tv_nsec;
-+}
-+
-+char *unique_name(const char *prefix)
-+{
-+	unsigned int i;
-+	uint64_t u_now;
-+	char n[17];
-+	char *str;
-+	int r;
-+
-+	/*
-+	 * This returns a random string which is guaranteed to be
-+	 * globally unique across all calls to unique_name(). We
-+	 * compose the string as:
-+	 *   <prefix>-<random>-<time>
-+	 * With:
-+	 *   <prefix>: string provided by the caller
-+	 *   <random>: a random alpha string of 16 characters
-+	 *   <time>: the current time in micro-seconds since last boot
-+	 *
-+	 * The <random> part makes the string always look vastly different,
-+	 * the <time> part makes sure no two calls return the same string.
-+	 */
-+
-+	u_now = now(CLOCK_MONOTONIC);
-+
-+	for (i = 0; i < sizeof(n) - 1; ++i)
-+		n[i] = 'a' + (rand() % ('z' - 'a'));
-+	n[sizeof(n) - 1] = 0;
-+
-+	r = asprintf(&str, "%s-%s-%" PRIu64, prefix, n, u_now);
-+	if (r < 0)
-+		return NULL;
-+
-+	return str;
-+}
-+
-+static int do_userns_map_id(pid_t pid,
-+			    const char *map_file,
-+			    const char *map_id)
-+{
-+	int ret;
-+	int fd;
-+	char *map;
-+	unsigned int i;
-+
-+	map = strndupa(map_id, strlen(map_id));
-+	if (!map) {
-+		ret = -errno;
-+		kdbus_printf("error strndupa %s: %d (%m)\n",
-+			map_file, ret);
-+		return ret;
-+	}
-+
-+	for (i = 0; i < strlen(map); i++)
-+		if (map[i] == ',')
-+			map[i] = '\n';
-+
-+	fd = open(map_file, O_RDWR);
-+	if (fd < 0) {
-+		ret = -errno;
-+		kdbus_printf("error open %s: %d (%m)\n",
-+			map_file, ret);
-+		return ret;
-+	}
-+
-+	ret = write(fd, map, strlen(map));
-+	if (ret < 0) {
-+		ret = -errno;
-+		kdbus_printf("error write to %s: %d (%m)\n",
-+			     map_file, ret);
-+		goto out;
-+	}
-+
-+	ret = 0;
-+
-+out:
-+	close(fd);
-+	return ret;
-+}
-+
-+int userns_map_uid_gid(pid_t pid,
-+		       const char *map_uid,
-+		       const char *map_gid)
-+{
-+	int fd, ret;
-+	char file_id[128] = {'\0'};
-+
-+	snprintf(file_id, sizeof(file_id), "/proc/%ld/uid_map",
-+		 (long) pid);
-+
-+	ret = do_userns_map_id(pid, file_id, map_uid);
-+	if (ret < 0)
-+		return ret;
-+
-+	snprintf(file_id, sizeof(file_id), "/proc/%ld/setgroups",
-+		 (long) pid);
-+
-+	fd = open(file_id, O_WRONLY);
-+	if (fd >= 0) {
-+		write(fd, "deny\n", 5);
-+		close(fd);
-+	}
-+
-+	snprintf(file_id, sizeof(file_id), "/proc/%ld/gid_map",
-+		 (long) pid);
-+
-+	return do_userns_map_id(pid, file_id, map_gid);
-+}
-+
-+static int do_cap_get_flag(cap_t caps, cap_value_t cap)
-+{
-+	int ret;
-+	cap_flag_value_t flag_set;
-+
-+	ret = cap_get_flag(caps, cap, CAP_EFFECTIVE, &flag_set);
-+	if (ret < 0) {
-+		ret = -errno;
-+		kdbus_printf("error cap_get_flag(): %d (%m)\n", ret);
-+		return ret;
-+	}
-+
-+	return (flag_set == CAP_SET);
-+}
-+
-+/*
-+ * Returns:
-+ *  1 in case all the requested effective capabilities are set.
-+ *  0 in case we do not have the requested capabilities. This value
-+ *    will be used to abort tests with TEST_SKIP
-+ *  Negative errno on failure.
-+ *
-+ *  Terminate args with a negative value.
-+ */
-+int test_is_capable(int cap, ...)
-+{
-+	int ret;
-+	va_list ap;
-+	cap_t caps;
-+
-+	caps = cap_get_proc();
-+	if (!caps) {
-+		ret = -errno;
-+		kdbus_printf("error cap_get_proc(): %d (%m)\n", ret);
-+		return ret;
-+	}
-+
-+	ret = do_cap_get_flag(caps, (cap_value_t)cap);
-+	if (ret <= 0)
-+		goto out;
-+
-+	va_start(ap, cap);
-+	while ((cap = va_arg(ap, int)) > 0) {
-+		ret = do_cap_get_flag(caps, (cap_value_t)cap);
-+		if (ret <= 0)
-+			break;
-+	}
-+	va_end(ap);
-+
-+out:
-+	cap_free(caps);
-+	return ret;
-+}
-+
-+int config_user_ns_is_enabled(void)
-+{
-+	return (access("/proc/self/uid_map", F_OK) == 0);
-+}
-+
-+int config_auditsyscall_is_enabled(void)
-+{
-+	return (access("/proc/self/loginuid", F_OK) == 0);
-+}
-+
-+int config_cgroups_is_enabled(void)
-+{
-+	return (access("/proc/self/cgroup", F_OK) == 0);
-+}
-+
-+int config_security_is_enabled(void)
-+{
-+	int fd;
-+	int ret;
-+	char buf[128];
-+
-+	/* CONFIG_SECURITY is disabled */
-+	if (access("/proc/self/attr/current", F_OK) != 0)
-+		return 0;
-+
-+	/*
-+	 * Now only if read() fails with -EINVAL then we assume
-+	 * that SECLABEL and LSM are disabled
-+	 */
-+	fd = open("/proc/self/attr/current", O_RDONLY|O_CLOEXEC);
-+	if (fd < 0)
-+		return 1;
-+
-+	ret = read(fd, buf, sizeof(buf));
-+	if (ret == -1 && errno == EINVAL)
-+		ret = 0;
-+	else
-+		ret = 1;
-+
-+	close(fd);
-+
-+	return ret;
-+}
-diff --git a/tools/testing/selftests/kdbus/kdbus-util.h b/tools/testing/selftests/kdbus/kdbus-util.h
-new file mode 100644
-index 0000000..e1e18b9
---- /dev/null
-+++ b/tools/testing/selftests/kdbus/kdbus-util.h
-@@ -0,0 +1,218 @@
-+/*
-+ * Copyright (C) 2013-2015 Kay Sievers
-+ * Copyright (C) 2013-2015 Daniel Mack
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#pragma once
-+
-+#define BIT(X) (1 << (X))
-+
-+#include <time.h>
-+#include <stdbool.h>
-+#include <linux/kdbus.h>
-+
-+#define _STRINGIFY(x) #x
-+#define STRINGIFY(x) _STRINGIFY(x)
-+#define ELEMENTSOF(x) (sizeof(x)/sizeof((x)[0]))
-+
-+#define KDBUS_PTR(addr) ((void *)(uintptr_t)(addr))
-+
-+#define KDBUS_ALIGN8(l) (((l) + 7) & ~7)
-+#define KDBUS_ITEM_HEADER_SIZE offsetof(struct kdbus_item, data)
-+#define KDBUS_ITEM_SIZE(s) KDBUS_ALIGN8((s) + KDBUS_ITEM_HEADER_SIZE)
-+
-+#define KDBUS_ITEM_NEXT(item) \
-+	(typeof(item))((uint8_t *)(item) + KDBUS_ALIGN8((item)->size))
-+#define KDBUS_ITEM_FOREACH(item, head, first)				\
-+	for ((item) = (head)->first;					\
-+	     ((uint8_t *)(item) < (uint8_t *)(head) + (head)->size) &&	\
-+	       ((uint8_t *)(item) >= (uint8_t *)(head));		\
-+	     (item) = KDBUS_ITEM_NEXT(item))
-+#define KDBUS_FOREACH(iter, first, _size)				\
-+	for ((iter) = (first);						\
-+	     ((uint8_t *)(iter) < (uint8_t *)(first) + (_size)) &&	\
-+	       ((uint8_t *)(iter) >= (uint8_t *)(first));		\
-+	     (iter) = (void *)((uint8_t *)(iter) + KDBUS_ALIGN8((iter)->size)))
-+
-+#define _KDBUS_ATTACH_BITS_SET_NR (__builtin_popcountll(_KDBUS_ATTACH_ALL))
-+
-+/* Sum of KDBUS_ITEM_* that reflects _KDBUS_ATTACH_ALL */
-+#define KDBUS_ATTACH_ITEMS_TYPE_SUM					\
-+	((((_KDBUS_ATTACH_BITS_SET_NR - 1) *				\
-+	((_KDBUS_ATTACH_BITS_SET_NR - 1) + 1)) / 2) +			\
-+	(_KDBUS_ITEM_ATTACH_BASE * _KDBUS_ATTACH_BITS_SET_NR))
-+
-+#define POOL_SIZE (16 * 1024LU * 1024LU)
-+
-+#define UNPRIV_UID 65534
-+#define UNPRIV_GID 65534
-+
-+/* Dump as user of process, useful for user namespace testing */
-+#define SUID_DUMP_USER	1
-+
-+extern int kdbus_util_verbose;
-+
-+#define kdbus_printf(X...) \
-+	if (kdbus_util_verbose) \
-+		printf(X)
-+
-+#define RUN_UNPRIVILEGED(child_uid, child_gid, _child_, _parent_) ({	\
-+		pid_t pid, rpid;					\
-+		int ret;						\
-+									\
-+		pid = fork();						\
-+		if (pid == 0) {						\
-+			ret = drop_privileges(child_uid, child_gid);	\
-+			ASSERT_EXIT_VAL(ret == 0, ret);			\
-+									\
-+			_child_;					\
-+			_exit(0);					\
-+		} else if (pid > 0) {					\
-+			_parent_;					\
-+			rpid = waitpid(pid, &ret, 0);			\
-+			ASSERT_RETURN(rpid == pid);			\
-+			ASSERT_RETURN(WIFEXITED(ret));			\
-+			ASSERT_RETURN(WEXITSTATUS(ret) == 0);		\
-+			ret = TEST_OK;					\
-+		} else {						\
-+			ret = pid;					\
-+		}							\
-+									\
-+		ret;							\
-+	})
-+
-+#define RUN_UNPRIVILEGED_CONN(_var_, _bus_, _code_)			\
-+	RUN_UNPRIVILEGED(UNPRIV_UID, UNPRIV_GID, ({			\
-+		struct kdbus_conn *_var_;				\
-+		_var_ = kdbus_hello(_bus_, 0, NULL, 0);			\
-+		ASSERT_EXIT(_var_);					\
-+		_code_;							\
-+		kdbus_conn_free(_var_);					\
-+	}), ({ 0; }))
-+
-+#define RUN_CLONE_CHILD(clone_ret, flags, _setup_, _child_body_,	\
-+			_parent_setup_, _parent_body_) ({		\
-+	pid_t pid, rpid;						\
-+	int ret;							\
-+	int efd = -1;							\
-+									\
-+	_setup_;							\
-+	efd = eventfd(0, EFD_CLOEXEC);					\
-+	ASSERT_RETURN(efd >= 0);					\
-+	*(clone_ret) = 0;						\
-+	pid = syscall(__NR_clone, flags, NULL);				\
-+	if (pid == 0) {							\
-+		eventfd_t event_status = 0;				\
-+		ret = prctl(PR_SET_PDEATHSIG, SIGKILL);			\
-+		ASSERT_EXIT(ret == 0);					\
-+		ret = eventfd_read(efd, &event_status);			\
-+		if (ret < 0 || event_status != 1) {			\
-+			kdbus_printf("error eventfd_read()\n");		\
-+			_exit(EXIT_FAILURE);				\
-+		}							\
-+		_child_body_;						\
-+		_exit(0);						\
-+	} else if (pid > 0) {						\
-+		_parent_setup_;						\
-+		ret = eventfd_write(efd, 1);				\
-+		ASSERT_RETURN(ret >= 0);				\
-+		_parent_body_;						\
-+		rpid = waitpid(pid, &ret, 0);				\
-+		ASSERT_RETURN(rpid == pid);				\
-+		ASSERT_RETURN(WIFEXITED(ret));				\
-+		ASSERT_RETURN(WEXITSTATUS(ret) == 0);			\
-+		ret = TEST_OK;						\
-+	} else {							\
-+		ret = -errno;						\
-+		*(clone_ret) = -errno;					\
-+	}								\
-+	close(efd);							\
-+	ret;								\
-+})
-+
-+/* Enums for parent if it should drop privs or not */
-+enum kdbus_drop_parent {
-+	DO_NOT_DROP,
-+	DROP_SAME_UNPRIV,
-+	DROP_OTHER_UNPRIV,
-+};
-+
-+struct kdbus_conn {
-+	int fd;
-+	uint64_t id;
-+	unsigned char *buf;
-+};
-+
-+int kdbus_sysfs_get_parameter_mask(const char *path, uint64_t *mask);
-+int kdbus_sysfs_set_parameter_mask(const char *path, uint64_t mask);
-+
-+int sys_memfd_create(const char *name, __u64 size);
-+int sys_memfd_seal_set(int fd);
-+off_t sys_memfd_get_size(int fd, off_t *size);
-+
-+int kdbus_list(struct kdbus_conn *conn, uint64_t flags);
-+int kdbus_name_release(struct kdbus_conn *conn, const char *name);
-+int kdbus_name_acquire(struct kdbus_conn *conn, const char *name,
-+		       uint64_t *flags);
-+void kdbus_msg_free(struct kdbus_msg *msg);
-+int kdbus_msg_recv(struct kdbus_conn *conn,
-+		   struct kdbus_msg **msg, uint64_t *offset);
-+int kdbus_msg_recv_poll(struct kdbus_conn *conn, int timeout_ms,
-+			struct kdbus_msg **msg_out, uint64_t *offset);
-+int kdbus_free(const struct kdbus_conn *conn, uint64_t offset);
-+int kdbus_msg_dump(const struct kdbus_conn *conn,
-+		   const struct kdbus_msg *msg);
-+int kdbus_create_bus(int control_fd, const char *name,
-+		     uint64_t owner_meta, char **path);
-+int kdbus_msg_send(const struct kdbus_conn *conn, const char *name,
-+		   uint64_t cookie, uint64_t flags, uint64_t timeout,
-+		   int64_t priority, uint64_t dst_id);
-+int kdbus_msg_send_sync(const struct kdbus_conn *conn, const char *name,
-+			uint64_t cookie, uint64_t flags, uint64_t timeout,
-+			int64_t priority, uint64_t dst_id, int cancel_fd);
-+int kdbus_msg_send_reply(const struct kdbus_conn *conn,
-+			 uint64_t reply_cookie,
-+			 uint64_t dst_id);
-+struct kdbus_conn *kdbus_hello(const char *path, uint64_t hello_flags,
-+			       const struct kdbus_item *item,
-+			       size_t item_size);
-+struct kdbus_conn *kdbus_hello_registrar(const char *path, const char *name,
-+					 const struct kdbus_policy_access *access,
-+					 size_t num_access, uint64_t flags);
-+struct kdbus_conn *kdbus_hello_activator(const char *path, const char *name,
-+					 const struct kdbus_policy_access *access,
-+					 size_t num_access);
-+bool kdbus_item_in_message(struct kdbus_msg *msg, uint64_t type);
-+int kdbus_bus_creator_info(struct kdbus_conn *conn,
-+			   uint64_t flags,
-+			   uint64_t *offset);
-+int kdbus_conn_info(struct kdbus_conn *conn, uint64_t id,
-+		    const char *name, uint64_t flags, uint64_t *offset);
-+void kdbus_conn_free(struct kdbus_conn *conn);
-+int kdbus_conn_update_attach_flags(struct kdbus_conn *conn,
-+				   uint64_t attach_flags_send,
-+				   uint64_t attach_flags_recv);
-+int kdbus_conn_update_policy(struct kdbus_conn *conn, const char *name,
-+			     const struct kdbus_policy_access *access,
-+			     size_t num_access);
-+
-+int kdbus_add_match_id(struct kdbus_conn *conn, uint64_t cookie,
-+		       uint64_t type, uint64_t id);
-+int kdbus_add_match_empty(struct kdbus_conn *conn);
-+
-+int all_uids_gids_are_mapped(void);
-+int drop_privileges(uid_t uid, gid_t gid);
-+uint64_t now(clockid_t clock);
-+char *unique_name(const char *prefix);
-+
-+int userns_map_uid_gid(pid_t pid, const char *map_uid, const char *map_gid);
-+int test_is_capable(int cap, ...);
-+int config_user_ns_is_enabled(void);
-+int config_auditsyscall_is_enabled(void);
-+int config_cgroups_is_enabled(void);
-+int config_security_is_enabled(void);
-diff --git a/tools/testing/selftests/kdbus/test-activator.c b/tools/testing/selftests/kdbus/test-activator.c
-new file mode 100644
-index 0000000..3d1b763
---- /dev/null
-+++ b/tools/testing/selftests/kdbus/test-activator.c
-@@ -0,0 +1,318 @@
-+#include <stdio.h>
-+#include <string.h>
-+#include <time.h>
-+#include <fcntl.h>
-+#include <stdlib.h>
-+#include <stdbool.h>
-+#include <stddef.h>
-+#include <unistd.h>
-+#include <stdint.h>
-+#include <errno.h>
-+#include <assert.h>
-+#include <poll.h>
-+#include <sys/capability.h>
-+#include <sys/types.h>
-+#include <sys/wait.h>
-+
-+#include "kdbus-test.h"
-+#include "kdbus-util.h"
-+#include "kdbus-enum.h"
-+
-+static int kdbus_starter_poll(struct kdbus_conn *conn)
-+{
-+	int ret;
-+	struct pollfd fd;
-+
-+	fd.fd = conn->fd;
-+	fd.events = POLLIN | POLLPRI | POLLHUP;
-+	fd.revents = 0;
-+
-+	ret = poll(&fd, 1, 100);
-+	if (ret == 0)
-+		return -ETIMEDOUT;
-+	else if (ret > 0) {
-+		if (fd.revents & POLLIN)
-+			return 0;
-+
-+		if (fd.revents & (POLLHUP | POLLERR))
-+			ret = -ECONNRESET;
-+	}
-+
-+	return ret;
-+}
-+
-+/* Ensure that kdbus activator logic is safe */
-+static int kdbus_priv_activator(struct kdbus_test_env *env)
-+{
-+	int ret;
-+	struct kdbus_msg *msg = NULL;
-+	uint64_t cookie = 0xdeadbeef;
-+	uint64_t flags = KDBUS_NAME_REPLACE_EXISTING;
-+	struct kdbus_conn *activator;
-+	struct kdbus_conn *service;
-+	struct kdbus_conn *client;
-+	struct kdbus_conn *holder;
-+	struct kdbus_policy_access *access;
-+
-+	access = (struct kdbus_policy_access[]){
-+		{
-+			.type = KDBUS_POLICY_ACCESS_USER,
-+			.id = getuid(),
-+			.access = KDBUS_POLICY_OWN,
-+		},
-+		{
-+			.type = KDBUS_POLICY_ACCESS_USER,
-+			.id = getuid(),
-+			.access = KDBUS_POLICY_TALK,
-+		},
-+	};
-+
-+	activator = kdbus_hello_activator(env->buspath, "foo.priv.activator",
-+					  access, 2);
-+	ASSERT_RETURN(activator);
-+
-+	service = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(service);
-+
-+	client = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(client);
-+
-+	/*
-+	 * Make sure that other users can't TALK to the activator
-+	 */
-+
-+	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-+		/* Try to talk using the ID */
-+		ret = kdbus_msg_send(unpriv, NULL, 0xdeadbeef, 0, 0,
-+				     0, activator->id);
-+		ASSERT_EXIT(ret == -ENXIO);
-+
-+		/* Try to talk to the name */
-+		ret = kdbus_msg_send(unpriv, "foo.priv.activator",
-+				     0xdeadbeef, 0, 0, 0,
-+				     KDBUS_DST_ID_NAME);
-+		ASSERT_EXIT(ret == -EPERM);
-+	}));
-+	ASSERT_RETURN(ret >= 0);
-+
-+	/*
-+	 * Make sure that we did not receive anything, so the
-+	 * service will not be started automatically
-+	 */
-+
-+	ret = kdbus_starter_poll(activator);
-+	ASSERT_RETURN(ret == -ETIMEDOUT);
-+
-+	/*
-+	 * Now try to emulate the starter/service logic and
-+	 * acquire the name.
-+	 */
-+
-+	cookie++;
-+	ret = kdbus_msg_send(service, "foo.priv.activator", cookie,
-+			     0, 0, 0, KDBUS_DST_ID_NAME);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_starter_poll(activator);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* Policies are still checked, access denied */
-+
-+	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-+		ret = kdbus_name_acquire(unpriv, "foo.priv.activator",
-+					 &flags);
-+		ASSERT_RETURN(ret == -EPERM);
-+	}));
-+	ASSERT_RETURN(ret >= 0);
-+
-+	ret = kdbus_name_acquire(service, "foo.priv.activator",
-+				 &flags);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* We read our previous starter message */
-+
-+	ret = kdbus_msg_recv_poll(service, 100, NULL, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* Try to talk, we still fail */
-+
-+	cookie++;
-+	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-+		/* Try to talk to the name */
-+		ret = kdbus_msg_send(unpriv, "foo.priv.activator",
-+				     cookie, 0, 0, 0,
-+				     KDBUS_DST_ID_NAME);
-+		ASSERT_EXIT(ret == -EPERM);
-+	}));
-+	ASSERT_RETURN(ret >= 0);
-+
-+	/* Still nothing to read */
-+
-+	ret = kdbus_msg_recv_poll(service, 100, NULL, NULL);
-+	ASSERT_RETURN(ret == -ETIMEDOUT);
-+
-+	/* We receive every thing now */
-+
-+	cookie++;
-+	ret = kdbus_msg_send(client, "foo.priv.activator", cookie,
-+			     0, 0, 0, KDBUS_DST_ID_NAME);
-+	ASSERT_RETURN(ret == 0);
-+	ret = kdbus_msg_recv_poll(service, 100, &msg, NULL);
-+	ASSERT_RETURN(ret == 0 && msg->cookie == cookie);
-+
-+	kdbus_msg_free(msg);
-+
-+	/* Policies default to deny TALK now */
-+	kdbus_conn_free(activator);
-+
-+	cookie++;
-+	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-+		/* Try to talk to the name */
-+		ret = kdbus_msg_send(unpriv, "foo.priv.activator",
-+				     cookie, 0, 0, 0,
-+				     KDBUS_DST_ID_NAME);
-+		ASSERT_EXIT(ret == -EPERM);
-+	}));
-+	ASSERT_RETURN(ret >= 0);
-+
-+	ret = kdbus_msg_recv_poll(service, 100, NULL, NULL);
-+	ASSERT_RETURN(ret == -ETIMEDOUT);
-+
-+	/* Same user is able to TALK */
-+	cookie++;
-+	ret = kdbus_msg_send(client, "foo.priv.activator", cookie,
-+			     0, 0, 0, KDBUS_DST_ID_NAME);
-+	ASSERT_RETURN(ret == 0);
-+	ret = kdbus_msg_recv_poll(service, 100, &msg, NULL);
-+	ASSERT_RETURN(ret == 0 && msg->cookie == cookie);
-+
-+	kdbus_msg_free(msg);
-+
-+	access = (struct kdbus_policy_access []){
-+		{
-+			.type = KDBUS_POLICY_ACCESS_WORLD,
-+			.id = getuid(),
-+			.access = KDBUS_POLICY_TALK,
-+		},
-+	};
-+
-+	holder = kdbus_hello_registrar(env->buspath, "foo.priv.activator",
-+				       access, 1, KDBUS_HELLO_POLICY_HOLDER);
-+	ASSERT_RETURN(holder);
-+
-+	/* Now we are able to TALK to the name */
-+
-+	cookie++;
-+	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-+		/* Try to talk to the name */
-+		ret = kdbus_msg_send(unpriv, "foo.priv.activator",
-+				     cookie, 0, 0, 0,
-+				     KDBUS_DST_ID_NAME);
-+		ASSERT_EXIT(ret == 0);
-+	}));
-+	ASSERT_RETURN(ret >= 0);
-+
-+	ret = kdbus_msg_recv_poll(service, 100, NULL, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-+		ret = kdbus_name_acquire(unpriv, "foo.priv.activator",
-+					 &flags);
-+		ASSERT_RETURN(ret == -EPERM);
-+	}));
-+	ASSERT_RETURN(ret >= 0);
-+
-+	kdbus_conn_free(service);
-+	kdbus_conn_free(client);
-+	kdbus_conn_free(holder);
-+
-+	return 0;
-+}
-+
-+int kdbus_test_activator(struct kdbus_test_env *env)
-+{
-+	int ret;
-+	struct kdbus_conn *activator;
-+	struct pollfd fds[2];
-+	bool activator_done = false;
-+	struct kdbus_policy_access access[2];
-+
-+	access[0].type = KDBUS_POLICY_ACCESS_USER;
-+	access[0].id = getuid();
-+	access[0].access = KDBUS_POLICY_OWN;
-+
-+	access[1].type = KDBUS_POLICY_ACCESS_WORLD;
-+	access[1].access = KDBUS_POLICY_TALK;
-+
-+	activator = kdbus_hello_activator(env->buspath, "foo.test.activator",
-+					  access, 2);
-+	ASSERT_RETURN(activator);
-+
-+	ret = kdbus_add_match_empty(env->conn);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_list(env->conn, KDBUS_LIST_NAMES |
-+				    KDBUS_LIST_UNIQUE |
-+				    KDBUS_LIST_ACTIVATORS |
-+				    KDBUS_LIST_QUEUED);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_msg_send(env->conn, "foo.test.activator", 0xdeafbeef,
-+			     0, 0, 0, KDBUS_DST_ID_NAME);
-+	ASSERT_RETURN(ret == 0);
-+
-+	fds[0].fd = activator->fd;
-+	fds[1].fd = env->conn->fd;
-+
-+	kdbus_printf("-- entering poll loop ...\n");
-+
-+	for (;;) {
-+		int i, nfds = sizeof(fds) / sizeof(fds[0]);
-+
-+		for (i = 0; i < nfds; i++) {
-+			fds[i].events = POLLIN | POLLPRI;
-+			fds[i].revents = 0;
-+		}
-+
-+		ret = poll(fds, nfds, 3000);
-+		ASSERT_RETURN(ret >= 0);
-+
-+		ret = kdbus_list(env->conn, KDBUS_LIST_NAMES);
-+		ASSERT_RETURN(ret == 0);
-+
-+		if ((fds[0].revents & POLLIN) && !activator_done) {
-+			uint64_t flags = KDBUS_NAME_REPLACE_EXISTING;
-+
-+			kdbus_printf("Starter was called back!\n");
-+
-+			ret = kdbus_name_acquire(env->conn,
-+						 "foo.test.activator", &flags);
-+			ASSERT_RETURN(ret == 0);
-+
-+			activator_done = true;
-+		}
-+
-+		if (fds[1].revents & POLLIN) {
-+			kdbus_msg_recv(env->conn, NULL, NULL);
-+			break;
-+		}
-+	}
-+
-+	/* Check if all uids/gids are mapped */
-+	if (!all_uids_gids_are_mapped())
-+		return TEST_SKIP;
-+
-+	/* Check now capabilities, so we run the previous tests */
-+	ret = test_is_capable(CAP_SETUID, CAP_SETGID, -1);
-+	ASSERT_RETURN(ret >= 0);
-+
-+	if (!ret)
-+		return TEST_SKIP;
-+
-+	ret = kdbus_priv_activator(env);
-+	ASSERT_RETURN(ret == 0);
-+
-+	kdbus_conn_free(activator);
-+
-+	return TEST_OK;
-+}
-diff --git a/tools/testing/selftests/kdbus/test-benchmark.c b/tools/testing/selftests/kdbus/test-benchmark.c
-new file mode 100644
-index 0000000..8a9744b
---- /dev/null
-+++ b/tools/testing/selftests/kdbus/test-benchmark.c
-@@ -0,0 +1,451 @@
-+#include <stdio.h>
-+#include <string.h>
-+#include <time.h>
-+#include <fcntl.h>
-+#include <locale.h>
-+#include <stdlib.h>
-+#include <stddef.h>
-+#include <unistd.h>
-+#include <stdint.h>
-+#include <stdbool.h>
-+#include <errno.h>
-+#include <assert.h>
-+#include <poll.h>
-+#include <sys/time.h>
-+#include <sys/mman.h>
-+#include <sys/socket.h>
-+#include <math.h>
-+
-+#include "kdbus-api.h"
-+#include "kdbus-test.h"
-+#include "kdbus-util.h"
-+#include "kdbus-enum.h"
-+
-+#define SERVICE_NAME "foo.bar.echo"
-+
-+/*
-+ * To have a banchmark comparison with unix socket, set:
-+ * user_memfd	= false;
-+ * compare_uds	= true;
-+ * attach_none	= true;		do not attached metadata
-+ */
-+
-+static bool use_memfd = true;		/* transmit memfd? */
-+static bool compare_uds = false;		/* unix-socket comparison? */
-+static bool attach_none = false;		/* clear attach-flags? */
-+static char stress_payload[8192];
-+
-+struct stats {
-+	uint64_t count;
-+	uint64_t latency_acc;
-+	uint64_t latency_low;
-+	uint64_t latency_high;
-+	uint64_t latency_avg;
-+	uint64_t latency_ssquares;
-+};
-+
-+static struct stats stats;
-+
-+static void reset_stats(void)
-+{
-+	stats.count = 0;
-+	stats.latency_acc = 0;
-+	stats.latency_low = UINT64_MAX;
-+	stats.latency_high = 0;
-+	stats.latency_avg = 0;
-+	stats.latency_ssquares = 0;
-+}
-+
-+static void dump_stats(bool is_uds)
-+{
-+	if (stats.count > 0) {
-+		kdbus_printf("stats %s: %'llu packets processed, latency (nsecs) min/max/avg/dev %'7llu // %'7llu // %'7llu // %'7.f\n",
-+			     is_uds ? " (UNIX)" : "(KDBUS)",
-+			     (unsigned long long) stats.count,
-+			     (unsigned long long) stats.latency_low,
-+			     (unsigned long long) stats.latency_high,
-+			     (unsigned long long) stats.latency_avg,
-+			     sqrt(stats.latency_ssquares / stats.count));
-+	} else {
-+		kdbus_printf("*** no packets received. bus stuck?\n");
-+	}
-+}
-+
-+static void add_stats(uint64_t prev)
-+{
-+	uint64_t diff, latency_avg_prev;
-+
-+	diff = now(CLOCK_THREAD_CPUTIME_ID) - prev;
-+
-+	stats.count++;
-+	stats.latency_acc += diff;
-+
-+	/* see Welford62 */
-+	latency_avg_prev = stats.latency_avg;
-+	stats.latency_avg = stats.latency_acc / stats.count;
-+	stats.latency_ssquares += (diff - latency_avg_prev) * (diff - stats.latency_avg);
-+
-+	if (stats.latency_low > diff)
-+		stats.latency_low = diff;
-+
-+	if (stats.latency_high < diff)
-+		stats.latency_high = diff;
-+}
-+
-+static int setup_simple_kdbus_msg(struct kdbus_conn *conn,
-+				  uint64_t dst_id,
-+				  struct kdbus_msg **msg_out)
-+{
-+	struct kdbus_msg *msg;
-+	struct kdbus_item *item;
-+	uint64_t size;
-+
-+	size = sizeof(struct kdbus_msg);
-+	size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_vec));
-+
-+	msg = malloc(size);
-+	ASSERT_RETURN_VAL(msg, -ENOMEM);
-+
-+	memset(msg, 0, size);
-+	msg->size = size;
-+	msg->src_id = conn->id;
-+	msg->dst_id = dst_id;
-+	msg->payload_type = KDBUS_PAYLOAD_DBUS;
-+
-+	item = msg->items;
-+
-+	item->type = KDBUS_ITEM_PAYLOAD_VEC;
-+	item->size = KDBUS_ITEM_HEADER_SIZE + sizeof(struct kdbus_vec);
-+	item->vec.address = (uintptr_t) stress_payload;
-+	item->vec.size = sizeof(stress_payload);
-+	item = KDBUS_ITEM_NEXT(item);
-+
-+	*msg_out = msg;
-+
-+	return 0;
-+}
-+
-+static int setup_memfd_kdbus_msg(struct kdbus_conn *conn,
-+				 uint64_t dst_id,
-+				 off_t *memfd_item_offset,
-+				 struct kdbus_msg **msg_out)
-+{
-+	struct kdbus_msg *msg;
-+	struct kdbus_item *item;
-+	uint64_t size;
-+
-+	size = sizeof(struct kdbus_msg);
-+	size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_vec));
-+	size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_memfd));
-+
-+	msg = malloc(size);
-+	ASSERT_RETURN_VAL(msg, -ENOMEM);
-+
-+	memset(msg, 0, size);
-+	msg->size = size;
-+	msg->src_id = conn->id;
-+	msg->dst_id = dst_id;
-+	msg->payload_type = KDBUS_PAYLOAD_DBUS;
-+
-+	item = msg->items;
-+
-+	item->type = KDBUS_ITEM_PAYLOAD_VEC;
-+	item->size = KDBUS_ITEM_HEADER_SIZE + sizeof(struct kdbus_vec);
-+	item->vec.address = (uintptr_t) stress_payload;
-+	item->vec.size = sizeof(stress_payload);
-+	item = KDBUS_ITEM_NEXT(item);
-+
-+	item->type = KDBUS_ITEM_PAYLOAD_MEMFD;
-+	item->size = KDBUS_ITEM_HEADER_SIZE + sizeof(struct kdbus_memfd);
-+	item->memfd.size = sizeof(uint64_t);
-+
-+	*memfd_item_offset = (unsigned char *)item - (unsigned char *)msg;
-+	*msg_out = msg;
-+
-+	return 0;
-+}
-+
-+static int
-+send_echo_request(struct kdbus_conn *conn, uint64_t dst_id,
-+		  void *kdbus_msg, off_t memfd_item_offset)
-+{
-+	struct kdbus_cmd_send cmd = {};
-+	int memfd = -1;
-+	int ret;
-+
-+	if (use_memfd) {
-+		uint64_t now_ns = now(CLOCK_THREAD_CPUTIME_ID);
-+		struct kdbus_item *item = memfd_item_offset + kdbus_msg;
-+		memfd = sys_memfd_create("memfd-name", 0);
-+		ASSERT_RETURN_VAL(memfd >= 0, memfd);
-+
-+		ret = write(memfd, &now_ns, sizeof(now_ns));
-+		ASSERT_RETURN_VAL(ret == sizeof(now_ns), -EAGAIN);
-+
-+		ret = sys_memfd_seal_set(memfd);
-+		ASSERT_RETURN_VAL(ret == 0, -errno);
-+
-+		item->memfd.fd = memfd;
-+	}
-+
-+	cmd.size = sizeof(cmd);
-+	cmd.msg_address = (uintptr_t)kdbus_msg;
-+
-+	ret = kdbus_cmd_send(conn->fd, &cmd);
-+	ASSERT_RETURN_VAL(ret == 0, ret);
-+
-+	close(memfd);
-+
-+	return 0;
-+}
-+
-+static int
-+handle_echo_reply(struct kdbus_conn *conn, uint64_t send_ns)
-+{
-+	int ret;
-+	struct kdbus_cmd_recv recv = { .size = sizeof(recv) };
-+	struct kdbus_msg *msg;
-+	const struct kdbus_item *item;
-+	bool has_memfd = false;
-+
-+	ret = kdbus_cmd_recv(conn->fd, &recv);
-+	if (ret == -EAGAIN)
-+		return ret;
-+
-+	ASSERT_RETURN_VAL(ret == 0, ret);
-+
-+	if (!use_memfd)
-+		goto out;
-+
-+	msg = (struct kdbus_msg *)(conn->buf + recv.msg.offset);
-+
-+	KDBUS_ITEM_FOREACH(item, msg, items) {
-+		switch (item->type) {
-+		case KDBUS_ITEM_PAYLOAD_MEMFD: {
-+			char *buf;
-+
-+			buf = mmap(NULL, item->memfd.size, PROT_READ,
-+				   MAP_PRIVATE, item->memfd.fd, 0);
-+			ASSERT_RETURN_VAL(buf != MAP_FAILED, -EINVAL);
-+			ASSERT_RETURN_VAL(item->memfd.size == sizeof(uint64_t),
-+					  -EINVAL);
-+
-+			add_stats(*(uint64_t*)buf);
-+			munmap(buf, item->memfd.size);
-+			close(item->memfd.fd);
-+			has_memfd = true;
-+			break;
-+		}
-+
-+		case KDBUS_ITEM_PAYLOAD_OFF:
-+			/* ignore */
-+			break;
-+		}
-+	}
-+
-+out:
-+	if (!has_memfd)
-+		add_stats(send_ns);
-+
-+	ret = kdbus_free(conn, recv.msg.offset);
-+	ASSERT_RETURN_VAL(ret == 0, -errno);
-+
-+	return 0;
-+}
-+
-+static int benchmark(struct kdbus_test_env *env)
-+{
-+	static char buf[sizeof(stress_payload)];
-+	struct kdbus_msg *kdbus_msg = NULL;
-+	off_t memfd_cached_offset = 0;
-+	int ret;
-+	struct kdbus_conn *conn_a, *conn_b;
-+	struct pollfd fds[2];
-+	uint64_t start, send_ns, now_ns, diff;
-+	unsigned int i;
-+	int uds[2];
-+
-+	setlocale(LC_ALL, "");
-+
-+	for (i = 0; i < sizeof(stress_payload); i++)
-+		stress_payload[i] = i;
-+
-+	/* setup kdbus pair */
-+
-+	conn_a = kdbus_hello(env->buspath, 0, NULL, 0);
-+	conn_b = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn_a && conn_b);
-+
-+	ret = kdbus_add_match_empty(conn_a);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_add_match_empty(conn_b);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_name_acquire(conn_a, SERVICE_NAME, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	if (attach_none) {
-+		ret = kdbus_conn_update_attach_flags(conn_a,
-+						     _KDBUS_ATTACH_ALL,
-+						     0);
-+		ASSERT_RETURN(ret == 0);
-+	}
-+
-+	/* setup UDS pair */
-+
-+	ret = socketpair(AF_UNIX, SOCK_SEQPACKET | SOCK_NONBLOCK, 0, uds);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* setup a kdbus msg now */
-+	if (use_memfd) {
-+		ret = setup_memfd_kdbus_msg(conn_b, conn_a->id,
-+					    &memfd_cached_offset,
-+					    &kdbus_msg);
-+		ASSERT_RETURN(ret == 0);
-+	} else {
-+		ret = setup_simple_kdbus_msg(conn_b, conn_a->id, &kdbus_msg);
-+		ASSERT_RETURN(ret == 0);
-+	}
-+
-+	/* start benchmark */
-+
-+	kdbus_printf("-- entering poll loop ...\n");
-+
-+	do {
-+		/* run kdbus benchmark */
-+		fds[0].fd = conn_a->fd;
-+		fds[1].fd = conn_b->fd;
-+
-+		/* cancel any pending message */
-+		handle_echo_reply(conn_a, 0);
-+
-+		start = now(CLOCK_THREAD_CPUTIME_ID);
-+		reset_stats();
-+
-+		send_ns = now(CLOCK_THREAD_CPUTIME_ID);
-+		ret = send_echo_request(conn_b, conn_a->id,
-+					kdbus_msg, memfd_cached_offset);
-+		ASSERT_RETURN(ret == 0);
-+
-+		while (1) {
-+			unsigned int nfds = sizeof(fds) / sizeof(fds[0]);
-+			unsigned int i;
-+
-+			for (i = 0; i < nfds; i++) {
-+				fds[i].events = POLLIN | POLLPRI | POLLHUP;
-+				fds[i].revents = 0;
-+			}
-+
-+			ret = poll(fds, nfds, 10);
-+			if (ret < 0)
-+				break;
-+
-+			if (fds[0].revents & POLLIN) {
-+				ret = handle_echo_reply(conn_a, send_ns);
-+				ASSERT_RETURN(ret == 0);
-+
-+				send_ns = now(CLOCK_THREAD_CPUTIME_ID);
-+				ret = send_echo_request(conn_b, conn_a->id,
-+							kdbus_msg,
-+							memfd_cached_offset);
-+				ASSERT_RETURN(ret == 0);
-+			}
-+
-+			now_ns = now(CLOCK_THREAD_CPUTIME_ID);
-+			diff = now_ns - start;
-+			if (diff > 1000000000ULL) {
-+				start = now_ns;
-+
-+				dump_stats(false);
-+				break;
-+			}
-+		}
-+
-+		if (!compare_uds)
-+			continue;
-+
-+		/* run unix-socket benchmark as comparison */
-+
-+		fds[0].fd = uds[0];
-+		fds[1].fd = uds[1];
-+
-+		/* cancel any pendign message */
-+		read(uds[1], buf, sizeof(buf));
-+
-+		start = now(CLOCK_THREAD_CPUTIME_ID);
-+		reset_stats();
-+
-+		send_ns = now(CLOCK_THREAD_CPUTIME_ID);
-+		ret = write(uds[0], stress_payload, sizeof(stress_payload));
-+		ASSERT_RETURN(ret == sizeof(stress_payload));
-+
-+		while (1) {
-+			unsigned int nfds = sizeof(fds) / sizeof(fds[0]);
-+			unsigned int i;
-+
-+			for (i = 0; i < nfds; i++) {
-+				fds[i].events = POLLIN | POLLPRI | POLLHUP;
-+				fds[i].revents = 0;
-+			}
-+
-+			ret = poll(fds, nfds, 10);
-+			if (ret < 0)
-+				break;
-+
-+			if (fds[1].revents & POLLIN) {
-+				ret = read(uds[1], buf, sizeof(buf));
-+				ASSERT_RETURN(ret == sizeof(buf));
-+
-+				add_stats(send_ns);
-+
-+				send_ns = now(CLOCK_THREAD_CPUTIME_ID);
-+				ret = write(uds[0], buf, sizeof(buf));
-+				ASSERT_RETURN(ret == sizeof(buf));
-+			}
-+
-+			now_ns = now(CLOCK_THREAD_CPUTIME_ID);
-+			diff = now_ns - start;
-+			if (diff > 1000000000ULL) {
-+				start = now_ns;
-+
-+				dump_stats(true);
-+				break;
-+			}
-+		}
-+
-+	} while (kdbus_util_verbose);
-+
-+	kdbus_printf("-- closing bus connections\n");
-+
-+	free(kdbus_msg);
-+
-+	kdbus_conn_free(conn_a);
-+	kdbus_conn_free(conn_b);
-+
-+	return (stats.count > 1) ? TEST_OK : TEST_ERR;
-+}
-+
-+int kdbus_test_benchmark(struct kdbus_test_env *env)
-+{
-+	use_memfd = true;
-+	attach_none = false;
-+	compare_uds = false;
-+	return benchmark(env);
-+}
-+
-+int kdbus_test_benchmark_nomemfds(struct kdbus_test_env *env)
-+{
-+	use_memfd = false;
-+	attach_none = false;
-+	compare_uds = false;
-+	return benchmark(env);
-+}
-+
-+int kdbus_test_benchmark_uds(struct kdbus_test_env *env)
-+{
-+	use_memfd = false;
-+	attach_none = true;
-+	compare_uds = true;
-+	return benchmark(env);
-+}
-diff --git a/tools/testing/selftests/kdbus/test-bus.c b/tools/testing/selftests/kdbus/test-bus.c
-new file mode 100644
-index 0000000..762fb30
---- /dev/null
-+++ b/tools/testing/selftests/kdbus/test-bus.c
-@@ -0,0 +1,175 @@
-+#include <stdio.h>
-+#include <string.h>
-+#include <fcntl.h>
-+#include <stdlib.h>
-+#include <stddef.h>
-+#include <unistd.h>
-+#include <stdint.h>
-+#include <errno.h>
-+#include <assert.h>
-+#include <limits.h>
-+#include <sys/mman.h>
-+#include <stdbool.h>
-+
-+#include "kdbus-api.h"
-+#include "kdbus-util.h"
-+#include "kdbus-enum.h"
-+#include "kdbus-test.h"
-+
-+static struct kdbus_item *kdbus_get_item(struct kdbus_info *info,
-+					 uint64_t type)
-+{
-+	struct kdbus_item *item;
-+
-+	KDBUS_ITEM_FOREACH(item, info, items)
-+		if (item->type == type)
-+			return item;
-+
-+	return NULL;
-+}
-+
-+static int test_bus_creator_info(const char *bus_path)
-+{
-+	int ret;
-+	uint64_t offset;
-+	struct kdbus_conn *conn;
-+	struct kdbus_info *info;
-+	struct kdbus_item *item;
-+	char *tmp, *busname;
-+
-+	/* extract the bus-name from @bus_path */
-+	tmp = strdup(bus_path);
-+	ASSERT_RETURN(tmp);
-+	busname = strrchr(tmp, '/');
-+	ASSERT_RETURN(busname);
-+	*busname = 0;
-+	busname = strrchr(tmp, '/');
-+	ASSERT_RETURN(busname);
-+	++busname;
-+
-+	conn = kdbus_hello(bus_path, 0, NULL, 0);
-+	ASSERT_RETURN(conn);
-+
-+	ret = kdbus_bus_creator_info(conn, _KDBUS_ATTACH_ALL, &offset);
-+	ASSERT_RETURN(ret == 0);
-+
-+	info = (struct kdbus_info *)(conn->buf + offset);
-+
-+	item = kdbus_get_item(info, KDBUS_ITEM_MAKE_NAME);
-+	ASSERT_RETURN(item);
-+	ASSERT_RETURN(!strcmp(item->str, busname));
-+
-+	ret = kdbus_free(conn, offset);
-+	ASSERT_RETURN_VAL(ret == 0, ret);
-+
-+	free(tmp);
-+	kdbus_conn_free(conn);
-+	return 0;
-+}
-+
-+int kdbus_test_bus_make(struct kdbus_test_env *env)
-+{
-+	struct {
-+		struct kdbus_cmd cmd;
-+
-+		/* bloom size item */
-+		struct {
-+			uint64_t size;
-+			uint64_t type;
-+			struct kdbus_bloom_parameter bloom;
-+		} bs;
-+
-+		/* name item */
-+		uint64_t n_size;
-+		uint64_t n_type;
-+		char name[64];
-+	} bus_make;
-+	char s[PATH_MAX], *name;
-+	int ret, control_fd2;
-+	uid_t uid;
-+
-+	name = unique_name("");
-+	ASSERT_RETURN(name);
-+
-+	snprintf(s, sizeof(s), "%s/control", env->root);
-+	env->control_fd = open(s, O_RDWR|O_CLOEXEC);
-+	ASSERT_RETURN(env->control_fd >= 0);
-+
-+	control_fd2 = open(s, O_RDWR|O_CLOEXEC);
-+	ASSERT_RETURN(control_fd2 >= 0);
-+
-+	memset(&bus_make, 0, sizeof(bus_make));
-+
-+	bus_make.bs.size = sizeof(bus_make.bs);
-+	bus_make.bs.type = KDBUS_ITEM_BLOOM_PARAMETER;
-+	bus_make.bs.bloom.size = 64;
-+	bus_make.bs.bloom.n_hash = 1;
-+
-+	bus_make.n_type = KDBUS_ITEM_MAKE_NAME;
-+
-+	uid = getuid();
-+
-+	/* missing uid prefix */
-+	snprintf(bus_make.name, sizeof(bus_make.name), "foo");
-+	bus_make.n_size = KDBUS_ITEM_HEADER_SIZE + strlen(bus_make.name) + 1;
-+	bus_make.cmd.size = sizeof(struct kdbus_cmd) +
-+			    sizeof(bus_make.bs) + bus_make.n_size;
-+	ret = kdbus_cmd_bus_make(env->control_fd, &bus_make.cmd);
-+	ASSERT_RETURN(ret == -EINVAL);
-+
-+	/* non alphanumeric character */
-+	snprintf(bus_make.name, sizeof(bus_make.name), "%u-blah@123", uid);
-+	bus_make.n_size = KDBUS_ITEM_HEADER_SIZE + strlen(bus_make.name) + 1;
-+	bus_make.cmd.size = sizeof(struct kdbus_cmd) +
-+			    sizeof(bus_make.bs) + bus_make.n_size;
-+	ret = kdbus_cmd_bus_make(env->control_fd, &bus_make.cmd);
-+	ASSERT_RETURN(ret == -EINVAL);
-+
-+	/* '-' at the end */
-+	snprintf(bus_make.name, sizeof(bus_make.name), "%u-blah-", uid);
-+	bus_make.n_size = KDBUS_ITEM_HEADER_SIZE + strlen(bus_make.name) + 1;
-+	bus_make.cmd.size = sizeof(struct kdbus_cmd) +
-+			    sizeof(bus_make.bs) + bus_make.n_size;
-+	ret = kdbus_cmd_bus_make(env->control_fd, &bus_make.cmd);
-+	ASSERT_RETURN(ret == -EINVAL);
-+
-+	/* create a new bus */
-+	snprintf(bus_make.name, sizeof(bus_make.name), "%u-%s-1", uid, name);
-+	bus_make.n_size = KDBUS_ITEM_HEADER_SIZE + strlen(bus_make.name) + 1;
-+	bus_make.cmd.size = sizeof(struct kdbus_cmd) +
-+			    sizeof(bus_make.bs) + bus_make.n_size;
-+	ret = kdbus_cmd_bus_make(env->control_fd, &bus_make.cmd);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_cmd_bus_make(control_fd2, &bus_make.cmd);
-+	ASSERT_RETURN(ret == -EEXIST);
-+
-+	snprintf(s, sizeof(s), "%s/%u-%s-1/bus", env->root, uid, name);
-+	ASSERT_RETURN(access(s, F_OK) == 0);
-+
-+	ret = test_bus_creator_info(s);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* can't use the same fd for bus make twice, even though a different
-+	 * bus name is used
-+	 */
-+	snprintf(bus_make.name, sizeof(bus_make.name), "%u-%s-2", uid, name);
-+	bus_make.n_size = KDBUS_ITEM_HEADER_SIZE + strlen(bus_make.name) + 1;
-+	bus_make.cmd.size = sizeof(struct kdbus_cmd) +
-+			    sizeof(bus_make.bs) + bus_make.n_size;
-+	ret = kdbus_cmd_bus_make(env->control_fd, &bus_make.cmd);
-+	ASSERT_RETURN(ret == -EBADFD);
-+
-+	/* create a new bus, with different fd and different bus name */
-+	snprintf(bus_make.name, sizeof(bus_make.name), "%u-%s-2", uid, name);
-+	bus_make.n_size = KDBUS_ITEM_HEADER_SIZE + strlen(bus_make.name) + 1;
-+	bus_make.cmd.size = sizeof(struct kdbus_cmd) +
-+			    sizeof(bus_make.bs) + bus_make.n_size;
-+	ret = kdbus_cmd_bus_make(control_fd2, &bus_make.cmd);
-+	ASSERT_RETURN(ret == 0);
-+
-+	close(control_fd2);
-+	free(name);
-+
-+	return TEST_OK;
-+}
-diff --git a/tools/testing/selftests/kdbus/test-chat.c b/tools/testing/selftests/kdbus/test-chat.c
-new file mode 100644
-index 0000000..41e5b53
---- /dev/null
-+++ b/tools/testing/selftests/kdbus/test-chat.c
-@@ -0,0 +1,124 @@
-+#include <stdio.h>
-+#include <string.h>
-+#include <time.h>
-+#include <fcntl.h>
-+#include <stdlib.h>
-+#include <stddef.h>
-+#include <unistd.h>
-+#include <stdint.h>
-+#include <errno.h>
-+#include <assert.h>
-+#include <poll.h>
-+#include <stdbool.h>
-+
-+#include "kdbus-test.h"
-+#include "kdbus-util.h"
-+#include "kdbus-enum.h"
-+
-+int kdbus_test_chat(struct kdbus_test_env *env)
-+{
-+	int ret, cookie;
-+	struct kdbus_conn *conn_a, *conn_b;
-+	struct pollfd fds[2];
-+	uint64_t flags;
-+	int count;
-+
-+	conn_a = kdbus_hello(env->buspath, 0, NULL, 0);
-+	conn_b = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn_a && conn_b);
-+
-+	flags = KDBUS_NAME_ALLOW_REPLACEMENT;
-+	ret = kdbus_name_acquire(conn_a, "foo.bar.test", &flags);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_name_acquire(conn_a, "foo.bar.baz", NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	flags = KDBUS_NAME_QUEUE;
-+	ret = kdbus_name_acquire(conn_b, "foo.bar.baz", &flags);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_name_acquire(conn_a, "foo.bar.double", NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	flags = 0;
-+	ret = kdbus_name_acquire(conn_a, "foo.bar.double", &flags);
-+	ASSERT_RETURN(ret == 0);
-+	ASSERT_RETURN(!(flags & KDBUS_NAME_ACQUIRED));
-+
-+	ret = kdbus_name_release(conn_a, "foo.bar.double");
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_name_release(conn_a, "foo.bar.double");
-+	ASSERT_RETURN(ret == -ESRCH);
-+
-+	ret = kdbus_list(conn_b, KDBUS_LIST_UNIQUE |
-+				 KDBUS_LIST_NAMES  |
-+				 KDBUS_LIST_QUEUED |
-+				 KDBUS_LIST_ACTIVATORS);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_add_match_empty(conn_a);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_add_match_empty(conn_b);
-+	ASSERT_RETURN(ret == 0);
-+
-+	cookie = 0;
-+	ret = kdbus_msg_send(conn_b, NULL, 0xc0000000 | cookie, 0, 0, 0,
-+			     KDBUS_DST_ID_BROADCAST);
-+	ASSERT_RETURN(ret == 0);
-+
-+	fds[0].fd = conn_a->fd;
-+	fds[1].fd = conn_b->fd;
-+
-+	kdbus_printf("-- entering poll loop ...\n");
-+
-+	for (count = 0;; count++) {
-+		int i, nfds = sizeof(fds) / sizeof(fds[0]);
-+
-+		for (i = 0; i < nfds; i++) {
-+			fds[i].events = POLLIN | POLLPRI | POLLHUP;
-+			fds[i].revents = 0;
-+		}
-+
-+		ret = poll(fds, nfds, 3000);
-+		ASSERT_RETURN(ret >= 0);
-+
-+		if (fds[0].revents & POLLIN) {
-+			if (count > 2)
-+				kdbus_name_release(conn_a, "foo.bar.baz");
-+
-+			ret = kdbus_msg_recv(conn_a, NULL, NULL);
-+			ASSERT_RETURN(ret == 0);
-+			ret = kdbus_msg_send(conn_a, NULL,
-+					     0xc0000000 | cookie++,
-+					     0, 0, 0, conn_b->id);
-+			ASSERT_RETURN(ret == 0);
-+		}
-+
-+		if (fds[1].revents & POLLIN) {
-+			ret = kdbus_msg_recv(conn_b, NULL, NULL);
-+			ASSERT_RETURN(ret == 0);
-+			ret = kdbus_msg_send(conn_b, NULL,
-+					     0xc0000000 | cookie++,
-+					     0, 0, 0, conn_a->id);
-+			ASSERT_RETURN(ret == 0);
-+		}
-+
-+		ret = kdbus_list(conn_b, KDBUS_LIST_UNIQUE |
-+					 KDBUS_LIST_NAMES  |
-+					 KDBUS_LIST_QUEUED |
-+					 KDBUS_LIST_ACTIVATORS);
-+		ASSERT_RETURN(ret == 0);
-+
-+		if (count > 10)
-+			break;
-+	}
-+
-+	kdbus_printf("-- closing bus connections\n");
-+	kdbus_conn_free(conn_a);
-+	kdbus_conn_free(conn_b);
-+
-+	return TEST_OK;
-+}
-diff --git a/tools/testing/selftests/kdbus/test-connection.c b/tools/testing/selftests/kdbus/test-connection.c
-new file mode 100644
-index 0000000..4688ce8
---- /dev/null
-+++ b/tools/testing/selftests/kdbus/test-connection.c
-@@ -0,0 +1,597 @@
-+#include <stdio.h>
-+#include <string.h>
-+#include <fcntl.h>
-+#include <stdlib.h>
-+#include <stddef.h>
-+#include <unistd.h>
-+#include <stdint.h>
-+#include <errno.h>
-+#include <assert.h>
-+#include <limits.h>
-+#include <sys/types.h>
-+#include <sys/capability.h>
-+#include <sys/mman.h>
-+#include <sys/syscall.h>
-+#include <sys/wait.h>
-+#include <stdbool.h>
-+
-+#include "kdbus-api.h"
-+#include "kdbus-util.h"
-+#include "kdbus-enum.h"
-+#include "kdbus-test.h"
-+
-+int kdbus_test_hello(struct kdbus_test_env *env)
-+{
-+	struct kdbus_cmd_free cmd_free = {};
-+	struct kdbus_cmd_hello hello;
-+	int fd, ret;
-+
-+	memset(&hello, 0, sizeof(hello));
-+
-+	fd = open(env->buspath, O_RDWR|O_CLOEXEC);
-+	ASSERT_RETURN(fd >= 0);
-+
-+	hello.flags = KDBUS_HELLO_ACCEPT_FD;
-+	hello.attach_flags_send = _KDBUS_ATTACH_ALL;
-+	hello.attach_flags_recv = _KDBUS_ATTACH_ALL;
-+	hello.size = sizeof(struct kdbus_cmd_hello);
-+	hello.pool_size = POOL_SIZE;
-+
-+	/* an unaligned hello must result in -EFAULT */
-+	ret = kdbus_cmd_hello(fd, (struct kdbus_cmd_hello *) ((char *) &hello + 1));
-+	ASSERT_RETURN(ret == -EFAULT);
-+
-+	/* a size of 0 must return EMSGSIZE */
-+	hello.size = 1;
-+	hello.flags = KDBUS_HELLO_ACCEPT_FD;
-+	hello.attach_flags_send = _KDBUS_ATTACH_ALL;
-+	ret = kdbus_cmd_hello(fd, &hello);
-+	ASSERT_RETURN(ret == -EINVAL);
-+
-+	hello.size = sizeof(struct kdbus_cmd_hello);
-+
-+	/* check faulty flags */
-+	hello.flags = 1ULL << 32;
-+	hello.attach_flags_send = _KDBUS_ATTACH_ALL;
-+	ret = kdbus_cmd_hello(fd, &hello);
-+	ASSERT_RETURN(ret == -EINVAL);
-+
-+	/* check for faulty pool sizes */
-+	hello.pool_size = 0;
-+	hello.flags = KDBUS_HELLO_ACCEPT_FD;
-+	hello.attach_flags_send = _KDBUS_ATTACH_ALL;
-+	ret = kdbus_cmd_hello(fd, &hello);
-+	ASSERT_RETURN(ret == -EINVAL);
-+
-+	hello.pool_size = 4097;
-+	hello.attach_flags_send = _KDBUS_ATTACH_ALL;
-+	ret = kdbus_cmd_hello(fd, &hello);
-+	ASSERT_RETURN(ret == -EINVAL);
-+
-+	hello.pool_size = POOL_SIZE;
-+
-+	hello.attach_flags_send = _KDBUS_ATTACH_ALL;
-+	hello.offset = (__u64)-1;
-+
-+	/* success test */
-+	ret = kdbus_cmd_hello(fd, &hello);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* The kernel should have returned some items */
-+	ASSERT_RETURN(hello.offset != (__u64)-1);
-+	cmd_free.size = sizeof(cmd_free);
-+	cmd_free.offset = hello.offset;
-+	ret = kdbus_cmd_free(fd, &cmd_free);
-+	ASSERT_RETURN(ret >= 0);
-+
-+	close(fd);
-+
-+	fd = open(env->buspath, O_RDWR|O_CLOEXEC);
-+	ASSERT_RETURN(fd >= 0);
-+
-+	/* no ACTIVATOR flag without a name */
-+	hello.flags = KDBUS_HELLO_ACTIVATOR;
-+	ret = kdbus_cmd_hello(fd, &hello);
-+	ASSERT_RETURN(ret == -EINVAL);
-+
-+	close(fd);
-+
-+	return TEST_OK;
-+}
-+
-+int kdbus_test_byebye(struct kdbus_test_env *env)
-+{
-+	struct kdbus_conn *conn;
-+	struct kdbus_cmd_recv cmd_recv = { .size = sizeof(cmd_recv) };
-+	struct kdbus_cmd cmd_byebye = { .size = sizeof(cmd_byebye) };
-+	int ret;
-+
-+	/* create a 2nd connection */
-+	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn != NULL);
-+
-+	ret = kdbus_add_match_empty(conn);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_add_match_empty(env->conn);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* send over 1st connection */
-+	ret = kdbus_msg_send(env->conn, NULL, 0, 0, 0, 0,
-+			     KDBUS_DST_ID_BROADCAST);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* say byebye on the 2nd, which must fail */
-+	ret = kdbus_cmd_byebye(conn->fd, &cmd_byebye);
-+	ASSERT_RETURN(ret == -EBUSY);
-+
-+	/* receive the message */
-+	ret = kdbus_cmd_recv(conn->fd, &cmd_recv);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_free(conn, cmd_recv.msg.offset);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* and try again */
-+	ret = kdbus_cmd_byebye(conn->fd, &cmd_byebye);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* a 2nd try should result in -ECONNRESET */
-+	ret = kdbus_cmd_byebye(conn->fd, &cmd_byebye);
-+	ASSERT_RETURN(ret == -ECONNRESET);
-+
-+	kdbus_conn_free(conn);
-+
-+	return TEST_OK;
-+}
-+
-+/* Get only the first item */
-+static struct kdbus_item *kdbus_get_item(struct kdbus_info *info,
-+					 uint64_t type)
-+{
-+	struct kdbus_item *item;
-+
-+	KDBUS_ITEM_FOREACH(item, info, items)
-+		if (item->type == type)
-+			return item;
-+
-+	return NULL;
-+}
-+
-+static unsigned int kdbus_count_item(struct kdbus_info *info,
-+				     uint64_t type)
-+{
-+	unsigned int i = 0;
-+	const struct kdbus_item *item;
-+
-+	KDBUS_ITEM_FOREACH(item, info, items)
-+		if (item->type == type)
-+			i++;
-+
-+	return i;
-+}
-+
-+static int kdbus_fuzz_conn_info(struct kdbus_test_env *env, int capable)
-+{
-+	int ret;
-+	unsigned int cnt = 0;
-+	uint64_t offset = 0;
-+	struct kdbus_info *info;
-+	struct kdbus_conn *conn;
-+	struct kdbus_conn *privileged;
-+	const struct kdbus_item *item;
-+	uint64_t valid_flags = KDBUS_ATTACH_NAMES |
-+			       KDBUS_ATTACH_CREDS |
-+			       KDBUS_ATTACH_PIDS |
-+			       KDBUS_ATTACH_CONN_DESCRIPTION;
-+
-+	uint64_t invalid_flags = KDBUS_ATTACH_NAMES	|
-+				 KDBUS_ATTACH_CREDS	|
-+				 KDBUS_ATTACH_PIDS	|
-+				 KDBUS_ATTACH_CAPS	|
-+				 KDBUS_ATTACH_CGROUP	|
-+				 KDBUS_ATTACH_CONN_DESCRIPTION;
-+
-+	struct kdbus_creds cached_creds;
-+	uid_t ruid, euid, suid;
-+	gid_t rgid, egid, sgid;
-+
-+	getresuid(&ruid, &euid, &suid);
-+	getresgid(&rgid, &egid, &sgid);
-+
-+	cached_creds.uid = ruid;
-+	cached_creds.euid = euid;
-+	cached_creds.suid = suid;
-+	cached_creds.fsuid = ruid;
-+
-+	cached_creds.gid = rgid;
-+	cached_creds.egid = egid;
-+	cached_creds.sgid = sgid;
-+	cached_creds.fsgid = rgid;
-+
-+	struct kdbus_pids cached_pids = {
-+		.pid	= getpid(),
-+		.tid	= syscall(SYS_gettid),
-+		.ppid	= getppid(),
-+	};
-+
-+	ret = kdbus_conn_info(env->conn, env->conn->id, NULL,
-+			      valid_flags, &offset);
-+	ASSERT_RETURN(ret == 0);
-+
-+	info = (struct kdbus_info *)(env->conn->buf + offset);
-+	ASSERT_RETURN(info->id == env->conn->id);
-+
-+	/* We do not have any well-known name */
-+	item = kdbus_get_item(info, KDBUS_ITEM_NAME);
-+	ASSERT_RETURN(item == NULL);
-+
-+	item = kdbus_get_item(info, KDBUS_ITEM_CONN_DESCRIPTION);
-+	if (valid_flags & KDBUS_ATTACH_CONN_DESCRIPTION) {
-+		ASSERT_RETURN(item);
-+	} else {
-+		ASSERT_RETURN(item == NULL);
-+	}
-+
-+	kdbus_free(env->conn, offset);
-+
-+	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn);
-+
-+	privileged = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(privileged);
-+
-+	ret = kdbus_conn_info(conn, conn->id, NULL, valid_flags, &offset);
-+	ASSERT_RETURN(ret == 0);
-+
-+	info = (struct kdbus_info *)(conn->buf + offset);
-+	ASSERT_RETURN(info->id == conn->id);
-+
-+	/* We do not have any well-known name */
-+	item = kdbus_get_item(info, KDBUS_ITEM_NAME);
-+	ASSERT_RETURN(item == NULL);
-+
-+	cnt = kdbus_count_item(info, KDBUS_ITEM_CREDS);
-+	if (valid_flags & KDBUS_ATTACH_CREDS) {
-+		ASSERT_RETURN(cnt == 1);
-+
-+		item = kdbus_get_item(info, KDBUS_ITEM_CREDS);
-+		ASSERT_RETURN(item);
-+
-+		/* Compare received items with cached creds */
-+		ASSERT_RETURN(memcmp(&item->creds, &cached_creds,
-+				      sizeof(struct kdbus_creds)) == 0);
-+	} else {
-+		ASSERT_RETURN(cnt == 0);
-+	}
-+
-+	item = kdbus_get_item(info, KDBUS_ITEM_PIDS);
-+	if (valid_flags & KDBUS_ATTACH_PIDS) {
-+		ASSERT_RETURN(item);
-+
-+		/* Compare item->pids with cached PIDs */
-+		ASSERT_RETURN(item->pids.pid == cached_pids.pid &&
-+			      item->pids.tid == cached_pids.tid &&
-+			      item->pids.ppid == cached_pids.ppid);
-+	} else {
-+		ASSERT_RETURN(item == NULL);
-+	}
-+
-+	/* We did not request KDBUS_ITEM_CAPS */
-+	item = kdbus_get_item(info, KDBUS_ITEM_CAPS);
-+	ASSERT_RETURN(item == NULL);
-+
-+	kdbus_free(conn, offset);
-+
-+	ret = kdbus_name_acquire(conn, "com.example.a", NULL);
-+	ASSERT_RETURN(ret >= 0);
-+
-+	ret = kdbus_conn_info(conn, conn->id, NULL, valid_flags, &offset);
-+	ASSERT_RETURN(ret == 0);
-+
-+	info = (struct kdbus_info *)(conn->buf + offset);
-+	ASSERT_RETURN(info->id == conn->id);
-+
-+	item = kdbus_get_item(info, KDBUS_ITEM_OWNED_NAME);
-+	if (valid_flags & KDBUS_ATTACH_NAMES) {
-+		ASSERT_RETURN(item && !strcmp(item->name.name, "com.example.a"));
-+	} else {
-+		ASSERT_RETURN(item == NULL);
-+	}
-+
-+	kdbus_free(conn, offset);
-+
-+	ret = kdbus_conn_info(conn, 0, "com.example.a", valid_flags, &offset);
-+	ASSERT_RETURN(ret == 0);
-+
-+	info = (struct kdbus_info *)(conn->buf + offset);
-+	ASSERT_RETURN(info->id == conn->id);
-+
-+	kdbus_free(conn, offset);
-+
-+	/* does not have the necessary caps to drop to unprivileged */
-+	if (!capable)
-+		goto continue_test;
-+
-+	ret = RUN_UNPRIVILEGED(UNPRIV_UID, UNPRIV_GID, ({
-+		ret = kdbus_conn_info(conn, conn->id, NULL,
-+				      valid_flags, &offset);
-+		ASSERT_EXIT(ret == 0);
-+
-+		info = (struct kdbus_info *)(conn->buf + offset);
-+		ASSERT_EXIT(info->id == conn->id);
-+
-+		if (valid_flags & KDBUS_ATTACH_NAMES) {
-+			item = kdbus_get_item(info, KDBUS_ITEM_OWNED_NAME);
-+			ASSERT_EXIT(item &&
-+				    strcmp(item->name.name,
-+				           "com.example.a") == 0);
-+		}
-+
-+		if (valid_flags & KDBUS_ATTACH_CREDS) {
-+			item = kdbus_get_item(info, KDBUS_ITEM_CREDS);
-+			ASSERT_EXIT(item);
-+
-+			/* Compare received items with cached creds */
-+			ASSERT_EXIT(memcmp(&item->creds, &cached_creds,
-+				    sizeof(struct kdbus_creds)) == 0);
-+		}
-+
-+		if (valid_flags & KDBUS_ATTACH_PIDS) {
-+			item = kdbus_get_item(info, KDBUS_ITEM_PIDS);
-+			ASSERT_EXIT(item);
-+
-+			/*
-+			 * Compare item->pids with cached pids of
-+			 * privileged one.
-+			 *
-+			 * cmd_info will always return cached pids.
-+			 */
-+			ASSERT_EXIT(item->pids.pid == cached_pids.pid &&
-+				    item->pids.tid == cached_pids.tid);
-+		}
-+
-+		kdbus_free(conn, offset);
-+
-+		/*
-+		 * Use invalid_flags and make sure that userspace
-+		 * do not play with us.
-+		 */
-+		ret = kdbus_conn_info(conn, conn->id, NULL,
-+				      invalid_flags, &offset);
-+		ASSERT_EXIT(ret == 0);
-+
-+		/*
-+		 * Make sure that we return only one creds item and
-+		 * it points to the cached creds.
-+		 */
-+		cnt = kdbus_count_item(info, KDBUS_ITEM_CREDS);
-+		if (invalid_flags & KDBUS_ATTACH_CREDS) {
-+			ASSERT_EXIT(cnt == 1);
-+
-+			item = kdbus_get_item(info, KDBUS_ITEM_CREDS);
-+			ASSERT_EXIT(item);
-+
-+			/* Compare received items with cached creds */
-+			ASSERT_EXIT(memcmp(&item->creds, &cached_creds,
-+				    sizeof(struct kdbus_creds)) == 0);
-+		} else {
-+			ASSERT_EXIT(cnt == 0);
-+		}
-+
-+		if (invalid_flags & KDBUS_ATTACH_PIDS) {
-+			cnt = kdbus_count_item(info, KDBUS_ITEM_PIDS);
-+			ASSERT_EXIT(cnt == 1);
-+
-+			item = kdbus_get_item(info, KDBUS_ITEM_PIDS);
-+			ASSERT_EXIT(item);
-+
-+			/* Compare item->pids with cached pids */
-+			ASSERT_EXIT(item->pids.pid == cached_pids.pid &&
-+				    item->pids.tid == cached_pids.tid);
-+		}
-+
-+		cnt = kdbus_count_item(info, KDBUS_ITEM_CGROUP);
-+		if (invalid_flags & KDBUS_ATTACH_CGROUP) {
-+			ASSERT_EXIT(cnt == 1);
-+		} else {
-+			ASSERT_EXIT(cnt == 0);
-+		}
-+
-+		cnt = kdbus_count_item(info, KDBUS_ITEM_CAPS);
-+		if (invalid_flags & KDBUS_ATTACH_CAPS) {
-+			ASSERT_EXIT(cnt == 1);
-+		} else {
-+			ASSERT_EXIT(cnt == 0);
-+		}
-+
-+		kdbus_free(conn, offset);
-+	}),
-+	({ 0; }));
-+	ASSERT_RETURN(ret == 0);
-+
-+continue_test:
-+
-+	/* A second name */
-+	ret = kdbus_name_acquire(conn, "com.example.b", NULL);
-+	ASSERT_RETURN(ret >= 0);
-+
-+	ret = kdbus_conn_info(conn, conn->id, NULL, valid_flags, &offset);
-+	ASSERT_RETURN(ret == 0);
-+
-+	info = (struct kdbus_info *)(conn->buf + offset);
-+	ASSERT_RETURN(info->id == conn->id);
-+
-+	cnt = kdbus_count_item(info, KDBUS_ITEM_OWNED_NAME);
-+	if (valid_flags & KDBUS_ATTACH_NAMES) {
-+		ASSERT_RETURN(cnt == 2);
-+	} else {
-+		ASSERT_RETURN(cnt == 0);
-+	}
-+
-+	kdbus_free(conn, offset);
-+
-+	ASSERT_RETURN(ret == 0);
-+
-+	return 0;
-+}
-+
-+int kdbus_test_conn_info(struct kdbus_test_env *env)
-+{
-+	int ret;
-+	int have_caps;
-+	struct {
-+		struct kdbus_cmd_info cmd_info;
-+
-+		struct {
-+			uint64_t size;
-+			uint64_t type;
-+			char str[64];
-+		} name;
-+	} buf;
-+
-+	buf.cmd_info.size = sizeof(struct kdbus_cmd_info);
-+	buf.cmd_info.flags = 0;
-+	buf.cmd_info.attach_flags = 0;
-+	buf.cmd_info.id = env->conn->id;
-+
-+	ret = kdbus_conn_info(env->conn, env->conn->id, NULL, 0, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* try to pass a name that is longer than the buffer's size */
-+	buf.name.size = KDBUS_ITEM_HEADER_SIZE + 1;
-+	buf.name.type = KDBUS_ITEM_NAME;
-+	strcpy(buf.name.str, "foo.bar.bla");
-+
-+	buf.cmd_info.id = 0;
-+	buf.cmd_info.size = sizeof(buf.cmd_info) + buf.name.size;
-+	ret = kdbus_cmd_conn_info(env->conn->fd, (struct kdbus_cmd_info *) &buf);
-+	ASSERT_RETURN(ret == -EINVAL);
-+
-+	/* Pass a non existent name */
-+	ret = kdbus_conn_info(env->conn, 0, "non.existent.name", 0, NULL);
-+	ASSERT_RETURN(ret == -ESRCH);
-+
-+	if (!all_uids_gids_are_mapped())
-+		return TEST_SKIP;
-+
-+	/* Test for caps here, so we run the previous test */
-+	have_caps = test_is_capable(CAP_SETUID, CAP_SETGID, -1);
-+	ASSERT_RETURN(have_caps >= 0);
-+
-+	ret = kdbus_fuzz_conn_info(env, have_caps);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* Now if we have skipped some tests then let the user know */
-+	if (!have_caps)
-+		return TEST_SKIP;
-+
-+	return TEST_OK;
-+}
-+
-+int kdbus_test_conn_update(struct kdbus_test_env *env)
-+{
-+	struct kdbus_conn *conn;
-+	struct kdbus_msg *msg;
-+	int found = 0;
-+	int ret;
-+
-+	/*
-+	 * kdbus_hello() sets all attach flags. Receive a message by this
-+	 * connection, and make sure a timestamp item (just to pick one) is
-+	 * present.
-+	 */
-+	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn);
-+
-+	ret = kdbus_msg_send(env->conn, NULL, 0x12345678, 0, 0, 0, conn->id);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_msg_recv(conn, &msg, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	found = kdbus_item_in_message(msg, KDBUS_ITEM_TIMESTAMP);
-+	ASSERT_RETURN(found == 1);
-+
-+	kdbus_msg_free(msg);
-+
-+	/*
-+	 * Now, modify the attach flags and repeat the action. The item must
-+	 * now be missing.
-+	 */
-+	found = 0;
-+
-+	ret = kdbus_conn_update_attach_flags(conn,
-+					     _KDBUS_ATTACH_ALL,
-+					     _KDBUS_ATTACH_ALL &
-+					     ~KDBUS_ATTACH_TIMESTAMP);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_msg_send(env->conn, NULL, 0x12345678, 0, 0, 0, conn->id);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_msg_recv(conn, &msg, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	found = kdbus_item_in_message(msg, KDBUS_ITEM_TIMESTAMP);
-+	ASSERT_RETURN(found == 0);
-+
-+	/* Provide a bogus attach_flags value */
-+	ret = kdbus_conn_update_attach_flags(conn,
-+					     _KDBUS_ATTACH_ALL + 1,
-+					     _KDBUS_ATTACH_ALL);
-+	ASSERT_RETURN(ret == -EINVAL);
-+
-+	kdbus_msg_free(msg);
-+
-+	kdbus_conn_free(conn);
-+
-+	return TEST_OK;
-+}
-+
-+int kdbus_test_writable_pool(struct kdbus_test_env *env)
-+{
-+	struct kdbus_cmd_free cmd_free = {};
-+	struct kdbus_cmd_hello hello;
-+	int fd, ret;
-+	void *map;
-+
-+	fd = open(env->buspath, O_RDWR | O_CLOEXEC);
-+	ASSERT_RETURN(fd >= 0);
-+
-+	memset(&hello, 0, sizeof(hello));
-+	hello.flags = KDBUS_HELLO_ACCEPT_FD;
-+	hello.attach_flags_send = _KDBUS_ATTACH_ALL;
-+	hello.attach_flags_recv = _KDBUS_ATTACH_ALL;
-+	hello.size = sizeof(struct kdbus_cmd_hello);
-+	hello.pool_size = POOL_SIZE;
-+	hello.offset = (__u64)-1;
-+
-+	/* success test */
-+	ret = kdbus_cmd_hello(fd, &hello);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* The kernel should have returned some items */
-+	ASSERT_RETURN(hello.offset != (__u64)-1);
-+	cmd_free.size = sizeof(cmd_free);
-+	cmd_free.offset = hello.offset;
-+	ret = kdbus_cmd_free(fd, &cmd_free);
-+	ASSERT_RETURN(ret >= 0);
-+
-+	/* pools cannot be mapped writable */
-+	map = mmap(NULL, POOL_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
-+	ASSERT_RETURN(map == MAP_FAILED);
-+
-+	/* pools can always be mapped readable */
-+	map = mmap(NULL, POOL_SIZE, PROT_READ, MAP_SHARED, fd, 0);
-+	ASSERT_RETURN(map != MAP_FAILED);
-+
-+	/* make sure we cannot change protection masks to writable */
-+	ret = mprotect(map, POOL_SIZE, PROT_READ | PROT_WRITE);
-+	ASSERT_RETURN(ret < 0);
-+
-+	munmap(map, POOL_SIZE);
-+	close(fd);
-+
-+	return TEST_OK;
-+}
-diff --git a/tools/testing/selftests/kdbus/test-daemon.c b/tools/testing/selftests/kdbus/test-daemon.c
-new file mode 100644
-index 0000000..8bc2386
---- /dev/null
-+++ b/tools/testing/selftests/kdbus/test-daemon.c
-@@ -0,0 +1,65 @@
-+#include <stdio.h>
-+#include <string.h>
-+#include <time.h>
-+#include <fcntl.h>
-+#include <stdlib.h>
-+#include <stddef.h>
-+#include <unistd.h>
-+#include <stdint.h>
-+#include <errno.h>
-+#include <assert.h>
-+#include <poll.h>
-+#include <stdbool.h>
-+
-+#include "kdbus-test.h"
-+#include "kdbus-util.h"
-+#include "kdbus-enum.h"
-+
-+int kdbus_test_daemon(struct kdbus_test_env *env)
-+{
-+	struct pollfd fds[2];
-+	int count;
-+	int ret;
-+
-+	/* This test doesn't make any sense in non-interactive mode */
-+	if (!kdbus_util_verbose)
-+		return TEST_OK;
-+
-+	printf("Created connection %llu on bus '%s'\n",
-+		(unsigned long long) env->conn->id, env->buspath);
-+
-+	ret = kdbus_name_acquire(env->conn, "com.example.kdbus-test", NULL);
-+	ASSERT_RETURN(ret == 0);
-+	printf("  Aquired name: com.example.kdbus-test\n");
-+
-+	fds[0].fd = env->conn->fd;
-+	fds[1].fd = STDIN_FILENO;
-+
-+	printf("Monitoring connections:\n");
-+
-+	for (count = 0;; count++) {
-+		int i, nfds = sizeof(fds) / sizeof(fds[0]);
-+
-+		for (i = 0; i < nfds; i++) {
-+			fds[i].events = POLLIN | POLLPRI | POLLHUP;
-+			fds[i].revents = 0;
-+		}
-+
-+		ret = poll(fds, nfds, -1);
-+		if (ret <= 0)
-+			break;
-+
-+		if (fds[0].revents & POLLIN) {
-+			ret = kdbus_msg_recv(env->conn, NULL, NULL);
-+			ASSERT_RETURN(ret == 0);
-+		}
-+
-+		/* stdin */
-+		if (fds[1].revents & POLLIN)
-+			break;
-+	}
-+
-+	printf("Closing bus connection\n");
-+
-+	return TEST_OK;
-+}
-diff --git a/tools/testing/selftests/kdbus/test-endpoint.c b/tools/testing/selftests/kdbus/test-endpoint.c
-new file mode 100644
-index 0000000..34a7be4
---- /dev/null
-+++ b/tools/testing/selftests/kdbus/test-endpoint.c
-@@ -0,0 +1,352 @@
-+#include <stdio.h>
-+#include <string.h>
-+#include <fcntl.h>
-+#include <stdlib.h>
-+#include <stddef.h>
-+#include <unistd.h>
-+#include <stdint.h>
-+#include <errno.h>
-+#include <assert.h>
-+#include <libgen.h>
-+#include <sys/capability.h>
-+#include <sys/wait.h>
-+#include <stdbool.h>
-+
-+#include "kdbus-api.h"
-+#include "kdbus-util.h"
-+#include "kdbus-enum.h"
-+#include "kdbus-test.h"
-+
-+#define KDBUS_SYSNAME_MAX_LEN			63
-+
-+static int install_name_add_match(struct kdbus_conn *conn, const char *name)
-+{
-+	struct {
-+		struct kdbus_cmd_match cmd;
-+		struct {
-+			uint64_t size;
-+			uint64_t type;
-+			struct kdbus_notify_name_change chg;
-+		} item;
-+		char name[64];
-+	} buf;
-+	int ret;
-+
-+	/* install the match rule */
-+	memset(&buf, 0, sizeof(buf));
-+	buf.item.type = KDBUS_ITEM_NAME_ADD;
-+	buf.item.chg.old_id.id = KDBUS_MATCH_ID_ANY;
-+	buf.item.chg.new_id.id = KDBUS_MATCH_ID_ANY;
-+	strncpy(buf.name, name, sizeof(buf.name) - 1);
-+	buf.item.size = sizeof(buf.item) + strlen(buf.name) + 1;
-+	buf.cmd.size = sizeof(buf.cmd) + buf.item.size;
-+
-+	ret = kdbus_cmd_match_add(conn->fd, &buf.cmd);
-+	if (ret < 0)
-+		return ret;
-+
-+	return 0;
-+}
-+
-+static int create_endpoint(const char *buspath, uid_t uid, const char *name,
-+			   uint64_t flags)
-+{
-+	struct {
-+		struct kdbus_cmd cmd;
-+
-+		/* name item */
-+		struct {
-+			uint64_t size;
-+			uint64_t type;
-+			/* max should be KDBUS_SYSNAME_MAX_LEN */
-+			char str[128];
-+		} name;
-+	} ep_make;
-+	int fd, ret;
-+
-+	fd = open(buspath, O_RDWR);
-+	if (fd < 0)
-+		return fd;
-+
-+	memset(&ep_make, 0, sizeof(ep_make));
-+
-+	snprintf(ep_make.name.str,
-+		 /* Use the KDBUS_SYSNAME_MAX_LEN or sizeof(str) */
-+		 KDBUS_SYSNAME_MAX_LEN > strlen(name) ?
-+		 KDBUS_SYSNAME_MAX_LEN : sizeof(ep_make.name.str),
-+		 "%u-%s", uid, name);
-+
-+	ep_make.name.type = KDBUS_ITEM_MAKE_NAME;
-+	ep_make.name.size = KDBUS_ITEM_HEADER_SIZE +
-+			    strlen(ep_make.name.str) + 1;
-+
-+	ep_make.cmd.flags = flags;
-+	ep_make.cmd.size = sizeof(ep_make.cmd) + ep_make.name.size;
-+
-+	ret = kdbus_cmd_endpoint_make(fd, &ep_make.cmd);
-+	if (ret < 0) {
-+		kdbus_printf("error creating endpoint: %d (%m)\n", ret);
-+		return ret;
-+	}
-+
-+	return fd;
-+}
-+
-+static int unpriv_test_custom_ep(const char *buspath)
-+{
-+	int ret, ep_fd1, ep_fd2;
-+	char *ep1, *ep2, *tmp1, *tmp2;
-+
-+	tmp1 = strdup(buspath);
-+	tmp2 = strdup(buspath);
-+	ASSERT_RETURN(tmp1 && tmp2);
-+
-+	ret = asprintf(&ep1, "%s/%u-%s", dirname(tmp1), getuid(), "apps1");
-+	ASSERT_RETURN(ret >= 0);
-+
-+	ret = asprintf(&ep2, "%s/%u-%s", dirname(tmp2), getuid(), "apps2");
-+	ASSERT_RETURN(ret >= 0);
-+
-+	free(tmp1);
-+	free(tmp2);
-+
-+	/* endpoint only accessible to current uid */
-+	ep_fd1 = create_endpoint(buspath, getuid(), "apps1", 0);
-+	ASSERT_RETURN(ep_fd1 >= 0);
-+
-+	/* endpoint world accessible */
-+	ep_fd2 = create_endpoint(buspath, getuid(), "apps2",
-+				  KDBUS_MAKE_ACCESS_WORLD);
-+	ASSERT_RETURN(ep_fd2 >= 0);
-+
-+	ret = RUN_UNPRIVILEGED(UNPRIV_UID, UNPRIV_UID, ({
-+		int ep_fd;
-+		struct kdbus_conn *ep_conn;
-+
-+		/*
-+		 * Make sure that we are not able to create custom
-+		 * endpoints
-+		 */
-+		ep_fd = create_endpoint(buspath, getuid(),
-+					"unpriv_costum_ep", 0);
-+		ASSERT_EXIT(ep_fd == -EPERM);
-+
-+		/*
-+		 * Endpoint "apps1" only accessible to same users,
-+		 * that own the endpoint. Access denied by VFS
-+		 */
-+		ep_conn = kdbus_hello(ep1, 0, NULL, 0);
-+		ASSERT_EXIT(!ep_conn && errno == EACCES);
-+
-+		/* Endpoint "apps2" world accessible */
-+		ep_conn = kdbus_hello(ep2, 0, NULL, 0);
-+		ASSERT_EXIT(ep_conn);
-+
-+		kdbus_conn_free(ep_conn);
-+
-+		_exit(EXIT_SUCCESS);
-+	}),
-+	({ 0; }));
-+	ASSERT_RETURN(ret == 0);
-+
-+	close(ep_fd1);
-+	close(ep_fd2);
-+	free(ep1);
-+	free(ep2);
-+
-+	return 0;
-+}
-+
-+static int update_endpoint(int fd, const char *name)
-+{
-+	int len = strlen(name) + 1;
-+	struct {
-+		struct kdbus_cmd cmd;
-+
-+		/* name item */
-+		struct {
-+			uint64_t size;
-+			uint64_t type;
-+			char str[KDBUS_ALIGN8(len)];
-+		} name;
-+
-+		struct {
-+			uint64_t size;
-+			uint64_t type;
-+			struct kdbus_policy_access access;
-+		} access;
-+	} ep_update;
-+	int ret;
-+
-+	memset(&ep_update, 0, sizeof(ep_update));
-+
-+	ep_update.name.size = KDBUS_ITEM_HEADER_SIZE + len;
-+	ep_update.name.type = KDBUS_ITEM_NAME;
-+	strncpy(ep_update.name.str, name, sizeof(ep_update.name.str) - 1);
-+
-+	ep_update.access.size = sizeof(ep_update.access);
-+	ep_update.access.type = KDBUS_ITEM_POLICY_ACCESS;
-+	ep_update.access.access.type = KDBUS_POLICY_ACCESS_WORLD;
-+	ep_update.access.access.access = KDBUS_POLICY_SEE;
-+
-+	ep_update.cmd.size = sizeof(ep_update);
-+
-+	ret = kdbus_cmd_endpoint_update(fd, &ep_update.cmd);
-+	if (ret < 0) {
-+		kdbus_printf("error updating endpoint: %d (%m)\n", ret);
-+		return ret;
-+	}
-+
-+	return 0;
-+}
-+
-+int kdbus_test_custom_endpoint(struct kdbus_test_env *env)
-+{
-+	char *ep, *tmp;
-+	int ret, ep_fd;
-+	struct kdbus_msg *msg;
-+	struct kdbus_conn *ep_conn;
-+	struct kdbus_conn *reader;
-+	const char *name = "foo.bar.baz";
-+	const char *epname = "foo";
-+	char fake_ep[KDBUS_SYSNAME_MAX_LEN + 1] = {'\0'};
-+
-+	memset(fake_ep, 'X', sizeof(fake_ep) - 1);
-+
-+	/* Try to create a custom endpoint with a long name */
-+	ret = create_endpoint(env->buspath, getuid(), fake_ep, 0);
-+	ASSERT_RETURN(ret == -ENAMETOOLONG);
-+
-+	/* Try to create a custom endpoint with a different uid */
-+	ret = create_endpoint(env->buspath, getuid() + 1, "foobar", 0);
-+	ASSERT_RETURN(ret == -EINVAL);
-+
-+	/* create a custom endpoint, and open a connection on it */
-+	ep_fd = create_endpoint(env->buspath, getuid(), "foo", 0);
-+	ASSERT_RETURN(ep_fd >= 0);
-+
-+	tmp = strdup(env->buspath);
-+	ASSERT_RETURN(tmp);
-+
-+	ret = asprintf(&ep, "%s/%u-%s", dirname(tmp), getuid(), epname);
-+	free(tmp);
-+	ASSERT_RETURN(ret >= 0);
-+
-+	/* Register a connection that listen to broadcasts */
-+	reader = kdbus_hello(ep, 0, NULL, 0);
-+	ASSERT_RETURN(reader);
-+
-+	/* Register to kernel signals */
-+	ret = kdbus_add_match_id(reader, 0x1, KDBUS_ITEM_ID_ADD,
-+				 KDBUS_MATCH_ID_ANY);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_add_match_id(reader, 0x2, KDBUS_ITEM_ID_REMOVE,
-+				 KDBUS_MATCH_ID_ANY);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = install_name_add_match(reader, name);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* Monitor connections are not supported on custom endpoints */
-+	ep_conn = kdbus_hello(ep, KDBUS_HELLO_MONITOR, NULL, 0);
-+	ASSERT_RETURN(!ep_conn && errno == EOPNOTSUPP);
-+
-+	ep_conn = kdbus_hello(ep, 0, NULL, 0);
-+	ASSERT_RETURN(ep_conn);
-+
-+	/* Check that the reader got the IdAdd notification */
-+	ret = kdbus_msg_recv(reader, &msg, NULL);
-+	ASSERT_RETURN(ret == 0);
-+	ASSERT_RETURN(msg->items[0].type == KDBUS_ITEM_ID_ADD);
-+	ASSERT_RETURN(msg->items[0].id_change.id == ep_conn->id);
-+	kdbus_msg_free(msg);
-+
-+	/*
-+	 * Add a name add match on the endpoint connection, acquire name from
-+	 * the unfiltered connection, and make sure the filtered connection
-+	 * did not get the notification on the name owner change. Also, the
-+	 * endpoint connection may not be able to call conn_info, neither on
-+	 * the name nor on the ID.
-+	 */
-+	ret = install_name_add_match(ep_conn, name);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_name_acquire(env->conn, name, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_msg_recv(ep_conn, NULL, NULL);
-+	ASSERT_RETURN(ret == -EAGAIN);
-+
-+	ret = kdbus_conn_info(ep_conn, 0, name, 0, NULL);
-+	ASSERT_RETURN(ret == -ESRCH);
-+
-+	ret = kdbus_conn_info(ep_conn, 0, "random.crappy.name", 0, NULL);
-+	ASSERT_RETURN(ret == -ESRCH);
-+
-+	ret = kdbus_conn_info(ep_conn, env->conn->id, NULL, 0, NULL);
-+	ASSERT_RETURN(ret == -ENXIO);
-+
-+	ret = kdbus_conn_info(ep_conn, 0x0fffffffffffffffULL, NULL, 0, NULL);
-+	ASSERT_RETURN(ret == -ENXIO);
-+
-+	/* Check that the reader did not receive the name notification */
-+	ret = kdbus_msg_recv(reader, NULL, NULL);
-+	ASSERT_RETURN(ret == -EAGAIN);
-+
-+	/*
-+	 * Release the name again, update the custom endpoint policy,
-+	 * and try again. This time, the connection on the custom endpoint
-+	 * should have gotten it.
-+	 */
-+	ret = kdbus_name_release(env->conn, name);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* Check that the reader did not receive the name notification */
-+	ret = kdbus_msg_recv(reader, NULL, NULL);
-+	ASSERT_RETURN(ret == -EAGAIN);
-+
-+	ret = update_endpoint(ep_fd, name);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_name_acquire(env->conn, name, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_msg_recv(ep_conn, &msg, NULL);
-+	ASSERT_RETURN(ret == 0);
-+	ASSERT_RETURN(msg->items[0].type == KDBUS_ITEM_NAME_ADD);
-+	ASSERT_RETURN(msg->items[0].name_change.old_id.id == 0);
-+	ASSERT_RETURN(msg->items[0].name_change.new_id.id == env->conn->id);
-+	ASSERT_RETURN(strcmp(msg->items[0].name_change.name, name) == 0);
-+	kdbus_msg_free(msg);
-+
-+	ret = kdbus_msg_recv(reader, &msg, NULL);
-+	ASSERT_RETURN(ret == 0);
-+	ASSERT_RETURN(strcmp(msg->items[0].name_change.name, name) == 0);
-+
-+	kdbus_msg_free(msg);
-+
-+	ret = kdbus_conn_info(ep_conn, 0, name, 0, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_conn_info(ep_conn, env->conn->id, NULL, 0, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* If we have privileges test custom endpoints */
-+	ret = test_is_capable(CAP_SETUID, CAP_SETGID, -1);
-+	ASSERT_RETURN(ret >= 0);
-+
-+	/*
-+	 * All uids/gids are mapped and we have the necessary caps
-+	 */
-+	if (ret && all_uids_gids_are_mapped()) {
-+		ret = unpriv_test_custom_ep(env->buspath);
-+		ASSERT_RETURN(ret == 0);
-+	}
-+
-+	kdbus_conn_free(reader);
-+	kdbus_conn_free(ep_conn);
-+	close(ep_fd);
-+
-+	return TEST_OK;
-+}
-diff --git a/tools/testing/selftests/kdbus/test-fd.c b/tools/testing/selftests/kdbus/test-fd.c
-new file mode 100644
-index 0000000..2ae0f5a
---- /dev/null
-+++ b/tools/testing/selftests/kdbus/test-fd.c
-@@ -0,0 +1,789 @@
-+#include <stdio.h>
-+#include <string.h>
-+#include <time.h>
-+#include <fcntl.h>
-+#include <stdlib.h>
-+#include <stdbool.h>
-+#include <stddef.h>
-+#include <unistd.h>
-+#include <stdint.h>
-+#include <errno.h>
-+#include <assert.h>
-+#include <sys/types.h>
-+#include <sys/mman.h>
-+#include <sys/socket.h>
-+#include <sys/wait.h>
-+
-+#include "kdbus-api.h"
-+#include "kdbus-test.h"
-+#include "kdbus-util.h"
-+#include "kdbus-enum.h"
-+
-+#define KDBUS_MSG_MAX_ITEMS     128
-+#define KDBUS_USER_MAX_CONN	256
-+
-+/* maximum number of inflight fds in a target queue per user */
-+#define KDBUS_CONN_MAX_FDS_PER_USER	16
-+
-+/* maximum number of memfd items per message */
-+#define KDBUS_MSG_MAX_MEMFD_ITEMS       16
-+
-+static int make_msg_payload_dbus(uint64_t src_id, uint64_t dst_id,
-+				 uint64_t msg_size,
-+				 struct kdbus_msg **msg_dbus)
-+{
-+	struct kdbus_msg *msg;
-+
-+	msg = malloc(msg_size);
-+	ASSERT_RETURN_VAL(msg, -ENOMEM);
-+
-+	memset(msg, 0, msg_size);
-+	msg->size = msg_size;
-+	msg->src_id = src_id;
-+	msg->dst_id = dst_id;
-+	msg->payload_type = KDBUS_PAYLOAD_DBUS;
-+
-+	*msg_dbus = msg;
-+
-+	return 0;
-+}
-+
-+static void make_item_memfds(struct kdbus_item *item,
-+			     int *memfds, size_t memfd_size)
-+{
-+	size_t i;
-+
-+	for (i = 0; i < memfd_size; i++) {
-+		item->type = KDBUS_ITEM_PAYLOAD_MEMFD;
-+		item->size = KDBUS_ITEM_HEADER_SIZE +
-+			     sizeof(struct kdbus_memfd);
-+		item->memfd.fd = memfds[i];
-+		item->memfd.size = sizeof(uint64_t); /* const size */
-+		item = KDBUS_ITEM_NEXT(item);
-+	}
-+}
-+
-+static void make_item_fds(struct kdbus_item *item,
-+			  int *fd_array, size_t fd_size)
-+{
-+	size_t i;
-+	item->type = KDBUS_ITEM_FDS;
-+	item->size = KDBUS_ITEM_HEADER_SIZE + (sizeof(int) * fd_size);
-+
-+	for (i = 0; i < fd_size; i++)
-+		item->fds[i] = fd_array[i];
-+}
-+
-+static int memfd_write(const char *name, void *buf, size_t bufsize)
-+{
-+	ssize_t ret;
-+	int memfd;
-+
-+	memfd = sys_memfd_create(name, 0);
-+	ASSERT_RETURN_VAL(memfd >= 0, memfd);
-+
-+	ret = write(memfd, buf, bufsize);
-+	ASSERT_RETURN_VAL(ret == (ssize_t)bufsize, -EAGAIN);
-+
-+	ret = sys_memfd_seal_set(memfd);
-+	ASSERT_RETURN_VAL(ret == 0, -errno);
-+
-+	return memfd;
-+}
-+
-+static int send_memfds(struct kdbus_conn *conn, uint64_t dst_id,
-+		       int *memfds_array, size_t memfd_count)
-+{
-+	struct kdbus_cmd_send cmd = {};
-+	struct kdbus_item *item;
-+	struct kdbus_msg *msg;
-+	uint64_t size;
-+	int ret;
-+
-+	size = sizeof(struct kdbus_msg);
-+	size += memfd_count * KDBUS_ITEM_SIZE(sizeof(struct kdbus_memfd));
-+
-+	if (dst_id == KDBUS_DST_ID_BROADCAST)
-+		size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_bloom_filter)) + 64;
-+
-+	ret = make_msg_payload_dbus(conn->id, dst_id, size, &msg);
-+	ASSERT_RETURN_VAL(ret == 0, ret);
-+
-+	item = msg->items;
-+
-+	if (dst_id == KDBUS_DST_ID_BROADCAST) {
-+		item->type = KDBUS_ITEM_BLOOM_FILTER;
-+		item->size = KDBUS_ITEM_SIZE(sizeof(struct kdbus_bloom_filter)) + 64;
-+		item = KDBUS_ITEM_NEXT(item);
-+
-+		msg->flags |= KDBUS_MSG_SIGNAL;
-+	}
-+
-+	make_item_memfds(item, memfds_array, memfd_count);
-+
-+	cmd.size = sizeof(cmd);
-+	cmd.msg_address = (uintptr_t)msg;
-+
-+	ret = kdbus_cmd_send(conn->fd, &cmd);
-+	if (ret < 0) {
-+		kdbus_printf("error sending message: %d (%m)\n", ret);
-+		return ret;
-+	}
-+
-+	free(msg);
-+	return 0;
-+}
-+
-+static int send_fds(struct kdbus_conn *conn, uint64_t dst_id,
-+		    int *fd_array, size_t fd_count)
-+{
-+	struct kdbus_cmd_send cmd = {};
-+	struct kdbus_item *item;
-+	struct kdbus_msg *msg;
-+	uint64_t size;
-+	int ret;
-+
-+	size = sizeof(struct kdbus_msg);
-+	size += KDBUS_ITEM_SIZE(sizeof(int) * fd_count);
-+
-+	if (dst_id == KDBUS_DST_ID_BROADCAST)
-+		size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_bloom_filter)) + 64;
-+
-+	ret = make_msg_payload_dbus(conn->id, dst_id, size, &msg);
-+	ASSERT_RETURN_VAL(ret == 0, ret);
-+
-+	item = msg->items;
-+
-+	if (dst_id == KDBUS_DST_ID_BROADCAST) {
-+		item->type = KDBUS_ITEM_BLOOM_FILTER;
-+		item->size = KDBUS_ITEM_SIZE(sizeof(struct kdbus_bloom_filter)) + 64;
-+		item = KDBUS_ITEM_NEXT(item);
-+
-+		msg->flags |= KDBUS_MSG_SIGNAL;
-+	}
-+
-+	make_item_fds(item, fd_array, fd_count);
-+
-+	cmd.size = sizeof(cmd);
-+	cmd.msg_address = (uintptr_t)msg;
-+
-+	ret = kdbus_cmd_send(conn->fd, &cmd);
-+	if (ret < 0) {
-+		kdbus_printf("error sending message: %d (%m)\n", ret);
-+		return ret;
-+	}
-+
-+	free(msg);
-+	return ret;
-+}
-+
-+static int send_fds_memfds(struct kdbus_conn *conn, uint64_t dst_id,
-+			   int *fds_array, size_t fd_count,
-+			   int *memfds_array, size_t memfd_count)
-+{
-+	struct kdbus_cmd_send cmd = {};
-+	struct kdbus_item *item;
-+	struct kdbus_msg *msg;
-+	uint64_t size;
-+	int ret;
-+
-+	size = sizeof(struct kdbus_msg);
-+	size += memfd_count * KDBUS_ITEM_SIZE(sizeof(struct kdbus_memfd));
-+	size += KDBUS_ITEM_SIZE(sizeof(int) * fd_count);
-+
-+	ret = make_msg_payload_dbus(conn->id, dst_id, size, &msg);
-+	ASSERT_RETURN_VAL(ret == 0, ret);
-+
-+	item = msg->items;
-+
-+	make_item_fds(item, fds_array, fd_count);
-+	item = KDBUS_ITEM_NEXT(item);
-+	make_item_memfds(item, memfds_array, memfd_count);
-+
-+	cmd.size = sizeof(cmd);
-+	cmd.msg_address = (uintptr_t)msg;
-+
-+	ret = kdbus_cmd_send(conn->fd, &cmd);
-+	if (ret < 0) {
-+		kdbus_printf("error sending message: %d (%m)\n", ret);
-+		return ret;
-+	}
-+
-+	free(msg);
-+	return ret;
-+}
-+
-+/* Return the number of received fds */
-+static unsigned int kdbus_item_get_nfds(struct kdbus_msg *msg)
-+{
-+	unsigned int fds = 0;
-+	const struct kdbus_item *item;
-+
-+	KDBUS_ITEM_FOREACH(item, msg, items) {
-+		switch (item->type) {
-+		case KDBUS_ITEM_FDS: {
-+			fds += (item->size - KDBUS_ITEM_HEADER_SIZE) /
-+				sizeof(int);
-+			break;
-+		}
-+
-+		case KDBUS_ITEM_PAYLOAD_MEMFD:
-+			fds++;
-+			break;
-+
-+		default:
-+			break;
-+		}
-+	}
-+
-+	return fds;
-+}
-+
-+static struct kdbus_msg *
-+get_kdbus_msg_with_fd(struct kdbus_conn *conn_src,
-+		      uint64_t dst_id, uint64_t cookie, int fd)
-+{
-+	int ret;
-+	uint64_t size;
-+	struct kdbus_item *item;
-+	struct kdbus_msg *msg;
-+
-+	size = sizeof(struct kdbus_msg);
-+	if (fd >= 0)
-+		size += KDBUS_ITEM_SIZE(sizeof(int));
-+
-+	ret = make_msg_payload_dbus(conn_src->id, dst_id, size, &msg);
-+	ASSERT_RETURN_VAL(ret == 0, NULL);
-+
-+	msg->cookie = cookie;
-+
-+	if (fd >= 0) {
-+		item = msg->items;
-+
-+		make_item_fds(item, (int *)&fd, 1);
-+	}
-+
-+	return msg;
-+}
-+
-+static int kdbus_test_no_fds(struct kdbus_test_env *env,
-+			     int *fds, int *memfd)
-+{
-+	pid_t pid;
-+	int ret, status;
-+	uint64_t cookie;
-+	int connfd1, connfd2;
-+	struct kdbus_msg *msg, *msg_sync_reply;
-+	struct kdbus_cmd_hello hello;
-+	struct kdbus_conn *conn_src, *conn_dst, *conn_dummy;
-+	struct kdbus_cmd_send cmd = {};
-+	struct kdbus_cmd_free cmd_free = {};
-+
-+	conn_src = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn_src);
-+
-+	connfd1 = open(env->buspath, O_RDWR|O_CLOEXEC);
-+	ASSERT_RETURN(connfd1 >= 0);
-+
-+	connfd2 = open(env->buspath, O_RDWR|O_CLOEXEC);
-+	ASSERT_RETURN(connfd2 >= 0);
-+
-+	/*
-+	 * Create connections without KDBUS_HELLO_ACCEPT_FD
-+	 * to test if send fd operations are blocked
-+	 */
-+	conn_dst = malloc(sizeof(*conn_dst));
-+	ASSERT_RETURN(conn_dst);
-+
-+	conn_dummy = malloc(sizeof(*conn_dummy));
-+	ASSERT_RETURN(conn_dummy);
-+
-+	memset(&hello, 0, sizeof(hello));
-+	hello.size = sizeof(struct kdbus_cmd_hello);
-+	hello.pool_size = POOL_SIZE;
-+	hello.attach_flags_send = _KDBUS_ATTACH_ALL;
-+
-+	ret = kdbus_cmd_hello(connfd1, &hello);
-+	ASSERT_RETURN(ret == 0);
-+
-+	cmd_free.size = sizeof(cmd_free);
-+	cmd_free.offset = hello.offset;
-+	ret = kdbus_cmd_free(connfd1, &cmd_free);
-+	ASSERT_RETURN(ret >= 0);
-+
-+	conn_dst->fd = connfd1;
-+	conn_dst->id = hello.id;
-+
-+	memset(&hello, 0, sizeof(hello));
-+	hello.size = sizeof(struct kdbus_cmd_hello);
-+	hello.pool_size = POOL_SIZE;
-+	hello.attach_flags_send = _KDBUS_ATTACH_ALL;
-+
-+	ret = kdbus_cmd_hello(connfd2, &hello);
-+	ASSERT_RETURN(ret == 0);
-+
-+	cmd_free.size = sizeof(cmd_free);
-+	cmd_free.offset = hello.offset;
-+	ret = kdbus_cmd_free(connfd2, &cmd_free);
-+	ASSERT_RETURN(ret >= 0);
-+
-+	conn_dummy->fd = connfd2;
-+	conn_dummy->id = hello.id;
-+
-+	conn_dst->buf = mmap(NULL, POOL_SIZE, PROT_READ,
-+			     MAP_SHARED, connfd1, 0);
-+	ASSERT_RETURN(conn_dst->buf != MAP_FAILED);
-+
-+	conn_dummy->buf = mmap(NULL, POOL_SIZE, PROT_READ,
-+			       MAP_SHARED, connfd2, 0);
-+	ASSERT_RETURN(conn_dummy->buf != MAP_FAILED);
-+
-+	/*
-+	 * Send fds to connection that do not accept fd passing
-+	 */
-+	ret = send_fds(conn_src, conn_dst->id, fds, 1);
-+	ASSERT_RETURN(ret == -ECOMM);
-+
-+	/*
-+	 * memfd are kdbus payload
-+	 */
-+	ret = send_memfds(conn_src, conn_dst->id, memfd, 1);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_msg_recv_poll(conn_dst, 100, NULL, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	cookie = time(NULL);
-+
-+	pid = fork();
-+	ASSERT_RETURN_VAL(pid >= 0, pid);
-+
-+	if (pid == 0) {
-+		struct timespec now;
-+
-+		/*
-+		 * A sync send/reply to a connection that do not
-+		 * accept fds should fail if it contains an fd
-+		 */
-+		msg_sync_reply = get_kdbus_msg_with_fd(conn_dst,
-+						       conn_dummy->id,
-+						       cookie, fds[0]);
-+		ASSERT_EXIT(msg_sync_reply);
-+
-+		ret = clock_gettime(CLOCK_MONOTONIC_COARSE, &now);
-+		ASSERT_EXIT(ret == 0);
-+
-+		msg_sync_reply->timeout_ns = now.tv_sec * 1000000000ULL +
-+					     now.tv_nsec + 100000000ULL;
-+		msg_sync_reply->flags = KDBUS_MSG_EXPECT_REPLY;
-+
-+		memset(&cmd, 0, sizeof(cmd));
-+		cmd.size = sizeof(cmd);
-+		cmd.msg_address = (uintptr_t)msg_sync_reply;
-+		cmd.flags = KDBUS_SEND_SYNC_REPLY;
-+
-+		ret = kdbus_cmd_send(conn_dst->fd, &cmd);
-+		ASSERT_EXIT(ret == -ECOMM);
-+
-+		/*
-+		 * Now send a normal message, but the sync reply
-+		 * will fail since it contains an fd that the
-+		 * original sender do not want.
-+		 *
-+		 * The original sender will fail with -ETIMEDOUT
-+		 */
-+		cookie++;
-+		ret = kdbus_msg_send_sync(conn_dst, NULL, cookie,
-+					  KDBUS_MSG_EXPECT_REPLY,
-+					  5000000000ULL, 0, conn_src->id, -1);
-+		ASSERT_EXIT(ret == -EREMOTEIO);
-+
-+		cookie++;
-+		ret = kdbus_msg_recv_poll(conn_dst, 100, &msg, NULL);
-+		ASSERT_EXIT(ret == 0);
-+		ASSERT_EXIT(msg->cookie == cookie);
-+
-+		free(msg_sync_reply);
-+		kdbus_msg_free(msg);
-+
-+		_exit(EXIT_SUCCESS);
-+	}
-+
-+	ret = kdbus_msg_recv_poll(conn_dummy, 100, NULL, NULL);
-+	ASSERT_RETURN(ret == -ETIMEDOUT);
-+
-+	cookie++;
-+	ret = kdbus_msg_recv_poll(conn_src, 100, &msg, NULL);
-+	ASSERT_RETURN(ret == 0 && msg->cookie == cookie);
-+
-+	kdbus_msg_free(msg);
-+
-+	/*
-+	 * Try to reply with a kdbus connection handle, this should
-+	 * fail with -EOPNOTSUPP
-+	 */
-+	msg_sync_reply = get_kdbus_msg_with_fd(conn_src,
-+					       conn_dst->id,
-+					       cookie, conn_dst->fd);
-+	ASSERT_RETURN(msg_sync_reply);
-+
-+	msg_sync_reply->cookie_reply = cookie;
-+
-+	memset(&cmd, 0, sizeof(cmd));
-+	cmd.size = sizeof(cmd);
-+	cmd.msg_address = (uintptr_t)msg_sync_reply;
-+
-+	ret = kdbus_cmd_send(conn_src->fd, &cmd);
-+	ASSERT_RETURN(ret == -EOPNOTSUPP);
-+
-+	free(msg_sync_reply);
-+
-+	/*
-+	 * Try to reply with a normal fd, this should fail even
-+	 * if the response is a sync reply
-+	 *
-+	 * From the sender view we fail with -ECOMM
-+	 */
-+	msg_sync_reply = get_kdbus_msg_with_fd(conn_src,
-+					       conn_dst->id,
-+					       cookie, fds[0]);
-+	ASSERT_RETURN(msg_sync_reply);
-+
-+	msg_sync_reply->cookie_reply = cookie;
-+
-+	memset(&cmd, 0, sizeof(cmd));
-+	cmd.size = sizeof(cmd);
-+	cmd.msg_address = (uintptr_t)msg_sync_reply;
-+
-+	ret = kdbus_cmd_send(conn_src->fd, &cmd);
-+	ASSERT_RETURN(ret == -ECOMM);
-+
-+	free(msg_sync_reply);
-+
-+	/*
-+	 * Resend another normal message and check if the queue
-+	 * is clear
-+	 */
-+	cookie++;
-+	ret = kdbus_msg_send(conn_src, NULL, cookie, 0, 0, 0,
-+			     conn_dst->id);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = waitpid(pid, &status, 0);
-+	ASSERT_RETURN_VAL(ret >= 0, ret);
-+
-+	kdbus_conn_free(conn_dummy);
-+	kdbus_conn_free(conn_dst);
-+	kdbus_conn_free(conn_src);
-+
-+	return (status == EXIT_SUCCESS) ? TEST_OK : TEST_ERR;
-+}
-+
-+static int kdbus_send_multiple_fds(struct kdbus_conn *conn_src,
-+				   struct kdbus_conn *conn_dst)
-+{
-+	int ret, i;
-+	unsigned int nfds;
-+	int fds[KDBUS_CONN_MAX_FDS_PER_USER + 1];
-+	int memfds[KDBUS_MSG_MAX_ITEMS + 1];
-+	struct kdbus_msg *msg;
-+	uint64_t dummy_value;
-+
-+	dummy_value = time(NULL);
-+
-+	for (i = 0; i < KDBUS_CONN_MAX_FDS_PER_USER + 1; i++) {
-+		fds[i] = open("/dev/null", O_RDWR|O_CLOEXEC);
-+		ASSERT_RETURN_VAL(fds[i] >= 0, -errno);
-+	}
-+
-+	/* Send KDBUS_CONN_MAX_FDS_PER_USER with one more fd */
-+	ret = send_fds(conn_src, conn_dst->id, fds,
-+		       KDBUS_CONN_MAX_FDS_PER_USER + 1);
-+	ASSERT_RETURN(ret == -EMFILE);
-+
-+	/* Retry with the correct KDBUS_CONN_MAX_FDS_PER_USER */
-+	ret = send_fds(conn_src, conn_dst->id, fds,
-+		       KDBUS_CONN_MAX_FDS_PER_USER);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_msg_recv(conn_dst, &msg, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* Check we got the right number of fds */
-+	nfds = kdbus_item_get_nfds(msg);
-+	ASSERT_RETURN(nfds == KDBUS_CONN_MAX_FDS_PER_USER);
-+
-+	kdbus_msg_free(msg);
-+
-+	for (i = 0; i < KDBUS_MSG_MAX_ITEMS + 1; i++, dummy_value++) {
-+		memfds[i] = memfd_write("memfd-name",
-+					&dummy_value,
-+					sizeof(dummy_value));
-+		ASSERT_RETURN_VAL(memfds[i] >= 0, memfds[i]);
-+	}
-+
-+	/* Send KDBUS_MSG_MAX_ITEMS with one more memfd */
-+	ret = send_memfds(conn_src, conn_dst->id,
-+			  memfds, KDBUS_MSG_MAX_ITEMS + 1);
-+	ASSERT_RETURN(ret == -E2BIG);
-+
-+	ret = send_memfds(conn_src, conn_dst->id,
-+			  memfds, KDBUS_MSG_MAX_MEMFD_ITEMS + 1);
-+	ASSERT_RETURN(ret == -E2BIG);
-+
-+	/* Retry with the correct KDBUS_MSG_MAX_ITEMS */
-+	ret = send_memfds(conn_src, conn_dst->id,
-+			  memfds, KDBUS_MSG_MAX_MEMFD_ITEMS);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_msg_recv(conn_dst, &msg, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* Check we got the right number of fds */
-+	nfds = kdbus_item_get_nfds(msg);
-+	ASSERT_RETURN(nfds == KDBUS_MSG_MAX_MEMFD_ITEMS);
-+
-+	kdbus_msg_free(msg);
-+
-+
-+	/*
-+	 * Combine multiple KDBUS_CONN_MAX_FDS_PER_USER+1 fds and
-+	 * 10 memfds
-+	 */
-+	ret = send_fds_memfds(conn_src, conn_dst->id,
-+			      fds, KDBUS_CONN_MAX_FDS_PER_USER + 1,
-+			      memfds, 10);
-+	ASSERT_RETURN(ret == -EMFILE);
-+
-+	ret = kdbus_msg_recv(conn_dst, NULL, NULL);
-+	ASSERT_RETURN(ret == -EAGAIN);
-+
-+	/*
-+	 * Combine multiple KDBUS_CONN_MAX_FDS_PER_USER fds and
-+	 * (128 - 1) + 1 memfds, all fds take one item, while each
-+	 * memfd takes one item
-+	 */
-+	ret = send_fds_memfds(conn_src, conn_dst->id,
-+			      fds, KDBUS_CONN_MAX_FDS_PER_USER,
-+			      memfds, (KDBUS_MSG_MAX_ITEMS - 1) + 1);
-+	ASSERT_RETURN(ret == -E2BIG);
-+
-+	ret = send_fds_memfds(conn_src, conn_dst->id,
-+			      fds, KDBUS_CONN_MAX_FDS_PER_USER,
-+			      memfds, KDBUS_MSG_MAX_MEMFD_ITEMS + 1);
-+	ASSERT_RETURN(ret == -E2BIG);
-+
-+	ret = kdbus_msg_recv(conn_dst, NULL, NULL);
-+	ASSERT_RETURN(ret == -EAGAIN);
-+
-+	/*
-+	 * Send KDBUS_CONN_MAX_FDS_PER_USER fds +
-+	 * KDBUS_MSG_MAX_MEMFD_ITEMS memfds
-+	 */
-+	ret = send_fds_memfds(conn_src, conn_dst->id,
-+			      fds, KDBUS_CONN_MAX_FDS_PER_USER,
-+			      memfds, KDBUS_MSG_MAX_MEMFD_ITEMS);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_msg_recv(conn_dst, &msg, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* Check we got the right number of fds */
-+	nfds = kdbus_item_get_nfds(msg);
-+	ASSERT_RETURN(nfds == KDBUS_CONN_MAX_FDS_PER_USER +
-+			      KDBUS_MSG_MAX_MEMFD_ITEMS);
-+
-+	kdbus_msg_free(msg);
-+
-+
-+	/*
-+	 * Re-send fds + memfds, close them, but do not receive them
-+	 * and try to queue more
-+	 */
-+	ret = send_fds_memfds(conn_src, conn_dst->id,
-+			      fds, KDBUS_CONN_MAX_FDS_PER_USER,
-+			      memfds, KDBUS_MSG_MAX_MEMFD_ITEMS);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* close old references and get a new ones */
-+	for (i = 0; i < KDBUS_CONN_MAX_FDS_PER_USER + 1; i++) {
-+		close(fds[i]);
-+		fds[i] = open("/dev/null", O_RDWR|O_CLOEXEC);
-+		ASSERT_RETURN_VAL(fds[i] >= 0, -errno);
-+	}
-+
-+	/* should fail since we have already fds in the queue */
-+	ret = send_fds(conn_src, conn_dst->id, fds,
-+		       KDBUS_CONN_MAX_FDS_PER_USER);
-+	ASSERT_RETURN(ret == -EMFILE);
-+
-+	/* This should succeed */
-+	ret = send_memfds(conn_src, conn_dst->id,
-+			  memfds, KDBUS_MSG_MAX_MEMFD_ITEMS);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_msg_recv(conn_dst, &msg, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	nfds = kdbus_item_get_nfds(msg);
-+	ASSERT_RETURN(nfds == KDBUS_CONN_MAX_FDS_PER_USER +
-+			      KDBUS_MSG_MAX_MEMFD_ITEMS);
-+
-+	kdbus_msg_free(msg);
-+
-+	ret = kdbus_msg_recv(conn_dst, &msg, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	nfds = kdbus_item_get_nfds(msg);
-+	ASSERT_RETURN(nfds == KDBUS_MSG_MAX_MEMFD_ITEMS);
-+
-+	kdbus_msg_free(msg);
-+
-+	ret = kdbus_msg_recv(conn_dst, NULL, NULL);
-+	ASSERT_RETURN(ret == -EAGAIN);
-+
-+	for (i = 0; i < KDBUS_CONN_MAX_FDS_PER_USER + 1; i++)
-+		close(fds[i]);
-+
-+	for (i = 0; i < KDBUS_MSG_MAX_ITEMS + 1; i++)
-+		close(memfds[i]);
-+
-+	return 0;
-+}
-+
-+int kdbus_test_fd_passing(struct kdbus_test_env *env)
-+{
-+	struct kdbus_conn *conn_src, *conn_dst;
-+	const char *str = "stackenblocken";
-+	const struct kdbus_item *item;
-+	struct kdbus_msg *msg;
-+	unsigned int i;
-+	uint64_t now;
-+	int fds_conn[2];
-+	int sock_pair[2];
-+	int fds[2];
-+	int memfd;
-+	int ret;
-+
-+	now = (uint64_t) time(NULL);
-+
-+	/* create two connections */
-+	conn_src = kdbus_hello(env->buspath, 0, NULL, 0);
-+	conn_dst = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn_src && conn_dst);
-+
-+	fds_conn[0] = conn_src->fd;
-+	fds_conn[1] = conn_dst->fd;
-+
-+	ret = socketpair(AF_UNIX, SOCK_STREAM, 0, sock_pair);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* Setup memfd */
-+	memfd = memfd_write("memfd-name", &now, sizeof(now));
-+	ASSERT_RETURN(memfd >= 0);
-+
-+	/* Setup pipes */
-+	ret = pipe(fds);
-+	ASSERT_RETURN(ret == 0);
-+
-+	i = write(fds[1], str, strlen(str));
-+	ASSERT_RETURN(i == strlen(str));
-+
-+	/*
-+	 * Try to ass the handle of a connection as message payload.
-+	 * This must fail.
-+	 */
-+	ret = send_fds(conn_src, conn_dst->id, fds_conn, 2);
-+	ASSERT_RETURN(ret == -ENOTSUP);
-+
-+	ret = send_fds(conn_dst, conn_src->id, fds_conn, 2);
-+	ASSERT_RETURN(ret == -ENOTSUP);
-+
-+	ret = send_fds(conn_src, conn_dst->id, sock_pair, 2);
-+	ASSERT_RETURN(ret == -ENOTSUP);
-+
-+	/*
-+	 * Send fds and memfds to connection that do not accept fds
-+	 */
-+	ret = kdbus_test_no_fds(env, fds, (int *)&memfd);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* Try to broadcast file descriptors. This must fail. */
-+	ret = send_fds(conn_src, KDBUS_DST_ID_BROADCAST, fds, 1);
-+	ASSERT_RETURN(ret == -ENOTUNIQ);
-+
-+	/* Try to broadcast memfd. This must succeed. */
-+	ret = send_memfds(conn_src, KDBUS_DST_ID_BROADCAST, (int *)&memfd, 1);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* Open code this loop */
-+loop_send_fds:
-+
-+	/*
-+	 * Send the read end of the pipe and close it.
-+	 */
-+	ret = send_fds(conn_src, conn_dst->id, fds, 1);
-+	ASSERT_RETURN(ret == 0);
-+	close(fds[0]);
-+
-+	ret = kdbus_msg_recv(conn_dst, &msg, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	KDBUS_ITEM_FOREACH(item, msg, items) {
-+		if (item->type == KDBUS_ITEM_FDS) {
-+			char tmp[14];
-+			int nfds = (item->size - KDBUS_ITEM_HEADER_SIZE) /
-+					sizeof(int);
-+			ASSERT_RETURN(nfds == 1);
-+
-+			i = read(item->fds[0], tmp, sizeof(tmp));
-+			if (i != 0) {
-+				ASSERT_RETURN(i == sizeof(tmp));
-+				ASSERT_RETURN(memcmp(tmp, str, sizeof(tmp)) == 0);
-+
-+				/* Write EOF */
-+				close(fds[1]);
-+
-+				/*
-+				 * Resend the read end of the pipe,
-+				 * the receiver still holds a reference
-+				 * to it...
-+				 */
-+				goto loop_send_fds;
-+			}
-+
-+			/* Got EOF */
-+
-+			/*
-+			 * Close the last reference to the read end
-+			 * of the pipe, other references are
-+			 * automatically closed just after send.
-+			 */
-+			close(item->fds[0]);
-+		}
-+	}
-+
-+	/*
-+	 * Try to resend the read end of the pipe. Must fail with
-+	 * -EBADF since both the sender and receiver closed their
-+	 * references to it. We assume the above since sender and
-+	 * receiver are on the same process.
-+	 */
-+	ret = send_fds(conn_src, conn_dst->id, fds, 1);
-+	ASSERT_RETURN(ret == -EBADF);
-+
-+	/* Then we clear out received any data... */
-+	kdbus_msg_free(msg);
-+
-+	ret = kdbus_send_multiple_fds(conn_src, conn_dst);
-+	ASSERT_RETURN(ret == 0);
-+
-+	close(sock_pair[0]);
-+	close(sock_pair[1]);
-+	close(memfd);
-+
-+	kdbus_conn_free(conn_src);
-+	kdbus_conn_free(conn_dst);
-+
-+	return TEST_OK;
-+}
-diff --git a/tools/testing/selftests/kdbus/test-free.c b/tools/testing/selftests/kdbus/test-free.c
-new file mode 100644
-index 0000000..f666da3
---- /dev/null
-+++ b/tools/testing/selftests/kdbus/test-free.c
-@@ -0,0 +1,64 @@
-+#include <stdio.h>
-+#include <string.h>
-+#include <fcntl.h>
-+#include <stdlib.h>
-+#include <stddef.h>
-+#include <unistd.h>
-+#include <stdint.h>
-+#include <errno.h>
-+#include <assert.h>
-+#include <stdbool.h>
-+
-+#include "kdbus-api.h"
-+#include "kdbus-util.h"
-+#include "kdbus-enum.h"
-+#include "kdbus-test.h"
-+
-+static int sample_ioctl_call(struct kdbus_test_env *env)
-+{
-+	int ret;
-+	struct kdbus_cmd_list cmd_list = {
-+		.flags = KDBUS_LIST_QUEUED,
-+		.size = sizeof(cmd_list),
-+	};
-+
-+	ret = kdbus_cmd_list(env->conn->fd, &cmd_list);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* DON'T FREE THIS SLICE OF MEMORY! */
-+
-+	return TEST_OK;
-+}
-+
-+int kdbus_test_free(struct kdbus_test_env *env)
-+{
-+	int ret;
-+	struct kdbus_cmd_free cmd_free = {};
-+
-+	/* free an unallocated buffer */
-+	cmd_free.size = sizeof(cmd_free);
-+	cmd_free.flags = 0;
-+	cmd_free.offset = 0;
-+	ret = kdbus_cmd_free(env->conn->fd, &cmd_free);
-+	ASSERT_RETURN(ret == -ENXIO);
-+
-+	/* free a buffer out of the pool's bounds */
-+	cmd_free.size = sizeof(cmd_free);
-+	cmd_free.offset = POOL_SIZE + 1;
-+	ret = kdbus_cmd_free(env->conn->fd, &cmd_free);
-+	ASSERT_RETURN(ret == -ENXIO);
-+
-+	/*
-+	 * The user application is responsible for freeing the allocated
-+	 * memory with the KDBUS_CMD_FREE ioctl, so let's test what happens
-+	 * if we forget about it.
-+	 */
-+
-+	ret = sample_ioctl_call(env);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = sample_ioctl_call(env);
-+	ASSERT_RETURN(ret == 0);
-+
-+	return TEST_OK;
-+}
-diff --git a/tools/testing/selftests/kdbus/test-match.c b/tools/testing/selftests/kdbus/test-match.c
-new file mode 100644
-index 0000000..2360dc1
---- /dev/null
-+++ b/tools/testing/selftests/kdbus/test-match.c
-@@ -0,0 +1,441 @@
-+#include <stdio.h>
-+#include <string.h>
-+#include <fcntl.h>
-+#include <stdlib.h>
-+#include <stddef.h>
-+#include <unistd.h>
-+#include <stdint.h>
-+#include <errno.h>
-+#include <assert.h>
-+#include <stdbool.h>
-+
-+#include "kdbus-api.h"
-+#include "kdbus-util.h"
-+#include "kdbus-enum.h"
-+#include "kdbus-test.h"
-+
-+int kdbus_test_match_id_add(struct kdbus_test_env *env)
-+{
-+	struct {
-+		struct kdbus_cmd_match cmd;
-+		struct {
-+			uint64_t size;
-+			uint64_t type;
-+			struct kdbus_notify_id_change chg;
-+		} item;
-+	} buf;
-+	struct kdbus_conn *conn;
-+	struct kdbus_msg *msg;
-+	int ret;
-+
-+	memset(&buf, 0, sizeof(buf));
-+
-+	buf.cmd.size = sizeof(buf);
-+	buf.cmd.cookie = 0xdeafbeefdeaddead;
-+	buf.item.size = sizeof(buf.item);
-+	buf.item.type = KDBUS_ITEM_ID_ADD;
-+	buf.item.chg.id = KDBUS_MATCH_ID_ANY;
-+
-+	/* match on id add */
-+	ret = kdbus_cmd_match_add(env->conn->fd, &buf.cmd);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* create 2nd connection */
-+	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn != NULL);
-+
-+	/* 1st connection should have received a notification */
-+	ret = kdbus_msg_recv(env->conn, &msg, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ASSERT_RETURN(msg->items[0].type == KDBUS_ITEM_ID_ADD);
-+	ASSERT_RETURN(msg->items[0].id_change.id == conn->id);
-+
-+	kdbus_conn_free(conn);
-+
-+	return TEST_OK;
-+}
-+
-+int kdbus_test_match_id_remove(struct kdbus_test_env *env)
-+{
-+	struct {
-+		struct kdbus_cmd_match cmd;
-+		struct {
-+			uint64_t size;
-+			uint64_t type;
-+			struct kdbus_notify_id_change chg;
-+		} item;
-+	} buf;
-+	struct kdbus_conn *conn;
-+	struct kdbus_msg *msg;
-+	size_t id;
-+	int ret;
-+
-+	/* create 2nd connection */
-+	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn != NULL);
-+	id = conn->id;
-+
-+	memset(&buf, 0, sizeof(buf));
-+	buf.cmd.size = sizeof(buf);
-+	buf.cmd.cookie = 0xdeafbeefdeaddead;
-+	buf.item.size = sizeof(buf.item);
-+	buf.item.type = KDBUS_ITEM_ID_REMOVE;
-+	buf.item.chg.id = id;
-+
-+	/* register match on 2nd connection */
-+	ret = kdbus_cmd_match_add(env->conn->fd, &buf.cmd);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* remove 2nd connection again */
-+	kdbus_conn_free(conn);
-+
-+	/* 1st connection should have received a notification */
-+	ret = kdbus_msg_recv(env->conn, &msg, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ASSERT_RETURN(msg->items[0].type == KDBUS_ITEM_ID_REMOVE);
-+	ASSERT_RETURN(msg->items[0].id_change.id == id);
-+
-+	return TEST_OK;
-+}
-+
-+int kdbus_test_match_replace(struct kdbus_test_env *env)
-+{
-+	struct {
-+		struct kdbus_cmd_match cmd;
-+		struct {
-+			uint64_t size;
-+			uint64_t type;
-+			struct kdbus_notify_id_change chg;
-+		} item;
-+	} buf;
-+	struct kdbus_conn *conn;
-+	struct kdbus_msg *msg;
-+	size_t id;
-+	int ret;
-+
-+	/* add a match to id_add */
-+	ASSERT_RETURN(kdbus_test_match_id_add(env) == TEST_OK);
-+
-+	/* do a replace of the match from id_add to id_remove */
-+	memset(&buf, 0, sizeof(buf));
-+
-+	buf.cmd.size = sizeof(buf);
-+	buf.cmd.cookie = 0xdeafbeefdeaddead;
-+	buf.cmd.flags = KDBUS_MATCH_REPLACE;
-+	buf.item.size = sizeof(buf.item);
-+	buf.item.type = KDBUS_ITEM_ID_REMOVE;
-+	buf.item.chg.id = KDBUS_MATCH_ID_ANY;
-+
-+	ret = kdbus_cmd_match_add(env->conn->fd, &buf.cmd);
-+
-+	/* create 2nd connection */
-+	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn != NULL);
-+	id = conn->id;
-+
-+	/* 1st connection should _not_ have received a notification */
-+	ret = kdbus_msg_recv(env->conn, &msg, NULL);
-+	ASSERT_RETURN(ret != 0);
-+
-+	/* remove 2nd connection */
-+	kdbus_conn_free(conn);
-+
-+	/* 1st connection should _now_ have received a notification */
-+	ret = kdbus_msg_recv(env->conn, &msg, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ASSERT_RETURN(msg->items[0].type == KDBUS_ITEM_ID_REMOVE);
-+	ASSERT_RETURN(msg->items[0].id_change.id == id);
-+
-+	return TEST_OK;
-+}
-+
-+int kdbus_test_match_name_add(struct kdbus_test_env *env)
-+{
-+	struct {
-+		struct kdbus_cmd_match cmd;
-+		struct {
-+			uint64_t size;
-+			uint64_t type;
-+			struct kdbus_notify_name_change chg;
-+		} item;
-+		char name[64];
-+	} buf;
-+	struct kdbus_msg *msg;
-+	char *name;
-+	int ret;
-+
-+	name = "foo.bla.blaz";
-+
-+	/* install the match rule */
-+	memset(&buf, 0, sizeof(buf));
-+	buf.item.type = KDBUS_ITEM_NAME_ADD;
-+	buf.item.chg.old_id.id = KDBUS_MATCH_ID_ANY;
-+	buf.item.chg.new_id.id = KDBUS_MATCH_ID_ANY;
-+	strncpy(buf.name, name, sizeof(buf.name) - 1);
-+	buf.item.size = sizeof(buf.item) + strlen(buf.name) + 1;
-+	buf.cmd.size = sizeof(buf.cmd) + buf.item.size;
-+
-+	ret = kdbus_cmd_match_add(env->conn->fd, &buf.cmd);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* acquire the name */
-+	ret = kdbus_name_acquire(env->conn, name, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* we should have received a notification */
-+	ret = kdbus_msg_recv(env->conn, &msg, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ASSERT_RETURN(msg->items[0].type == KDBUS_ITEM_NAME_ADD);
-+	ASSERT_RETURN(msg->items[0].name_change.old_id.id == 0);
-+	ASSERT_RETURN(msg->items[0].name_change.new_id.id == env->conn->id);
-+	ASSERT_RETURN(strcmp(msg->items[0].name_change.name, name) == 0);
-+
-+	return TEST_OK;
-+}
-+
-+int kdbus_test_match_name_remove(struct kdbus_test_env *env)
-+{
-+	struct {
-+		struct kdbus_cmd_match cmd;
-+		struct {
-+			uint64_t size;
-+			uint64_t type;
-+			struct kdbus_notify_name_change chg;
-+		} item;
-+		char name[64];
-+	} buf;
-+	struct kdbus_msg *msg;
-+	char *name;
-+	int ret;
-+
-+	name = "foo.bla.blaz";
-+
-+	/* acquire the name */
-+	ret = kdbus_name_acquire(env->conn, name, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* install the match rule */
-+	memset(&buf, 0, sizeof(buf));
-+	buf.item.type = KDBUS_ITEM_NAME_REMOVE;
-+	buf.item.chg.old_id.id = KDBUS_MATCH_ID_ANY;
-+	buf.item.chg.new_id.id = KDBUS_MATCH_ID_ANY;
-+	strncpy(buf.name, name, sizeof(buf.name) - 1);
-+	buf.item.size = sizeof(buf.item) + strlen(buf.name) + 1;
-+	buf.cmd.size = sizeof(buf.cmd) + buf.item.size;
-+
-+	ret = kdbus_cmd_match_add(env->conn->fd, &buf.cmd);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* release the name again */
-+	kdbus_name_release(env->conn, name);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* we should have received a notification */
-+	ret = kdbus_msg_recv(env->conn, &msg, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ASSERT_RETURN(msg->items[0].type == KDBUS_ITEM_NAME_REMOVE);
-+	ASSERT_RETURN(msg->items[0].name_change.old_id.id == env->conn->id);
-+	ASSERT_RETURN(msg->items[0].name_change.new_id.id == 0);
-+	ASSERT_RETURN(strcmp(msg->items[0].name_change.name, name) == 0);
-+
-+	return TEST_OK;
-+}
-+
-+int kdbus_test_match_name_change(struct kdbus_test_env *env)
-+{
-+	struct {
-+		struct kdbus_cmd_match cmd;
-+		struct {
-+			uint64_t size;
-+			uint64_t type;
-+			struct kdbus_notify_name_change chg;
-+		} item;
-+		char name[64];
-+	} buf;
-+	struct kdbus_conn *conn;
-+	struct kdbus_msg *msg;
-+	uint64_t flags;
-+	char *name = "foo.bla.baz";
-+	int ret;
-+
-+	/* acquire the name */
-+	ret = kdbus_name_acquire(env->conn, name, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* install the match rule */
-+	memset(&buf, 0, sizeof(buf));
-+	buf.item.type = KDBUS_ITEM_NAME_CHANGE;
-+	buf.item.chg.old_id.id = KDBUS_MATCH_ID_ANY;
-+	buf.item.chg.new_id.id = KDBUS_MATCH_ID_ANY;
-+	strncpy(buf.name, name, sizeof(buf.name) - 1);
-+	buf.item.size = sizeof(buf.item) + strlen(buf.name) + 1;
-+	buf.cmd.size = sizeof(buf.cmd) + buf.item.size;
-+
-+	ret = kdbus_cmd_match_add(env->conn->fd, &buf.cmd);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* create a 2nd connection */
-+	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn != NULL);
-+
-+	/* allow the new connection to own the same name */
-+	/* queue the 2nd connection as waiting owner */
-+	flags = KDBUS_NAME_QUEUE;
-+	ret = kdbus_name_acquire(conn, name, &flags);
-+	ASSERT_RETURN(ret == 0);
-+	ASSERT_RETURN(flags & KDBUS_NAME_IN_QUEUE);
-+
-+	/* release name from 1st connection */
-+	ret = kdbus_name_release(env->conn, name);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* we should have received a notification */
-+	ret = kdbus_msg_recv(env->conn, &msg, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ASSERT_RETURN(msg->items[0].type == KDBUS_ITEM_NAME_CHANGE);
-+	ASSERT_RETURN(msg->items[0].name_change.old_id.id == env->conn->id);
-+	ASSERT_RETURN(msg->items[0].name_change.new_id.id == conn->id);
-+	ASSERT_RETURN(strcmp(msg->items[0].name_change.name, name) == 0);
-+
-+	kdbus_conn_free(conn);
-+
-+	return TEST_OK;
-+}
-+
-+static int send_bloom_filter(const struct kdbus_conn *conn,
-+			     uint64_t cookie,
-+			     const uint8_t *filter,
-+			     size_t filter_size,
-+			     uint64_t filter_generation)
-+{
-+	struct kdbus_cmd_send cmd = {};
-+	struct kdbus_msg *msg;
-+	struct kdbus_item *item;
-+	uint64_t size;
-+	int ret;
-+
-+	size = sizeof(struct kdbus_msg);
-+	size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_bloom_filter)) + filter_size;
-+
-+	msg = alloca(size);
-+
-+	memset(msg, 0, size);
-+	msg->size = size;
-+	msg->src_id = conn->id;
-+	msg->dst_id = KDBUS_DST_ID_BROADCAST;
-+	msg->flags = KDBUS_MSG_SIGNAL;
-+	msg->payload_type = KDBUS_PAYLOAD_DBUS;
-+	msg->cookie = cookie;
-+
-+	item = msg->items;
-+	item->type = KDBUS_ITEM_BLOOM_FILTER;
-+	item->size = KDBUS_ITEM_SIZE(sizeof(struct kdbus_bloom_filter)) +
-+				filter_size;
-+
-+	item->bloom_filter.generation = filter_generation;
-+	memcpy(item->bloom_filter.data, filter, filter_size);
-+
-+	cmd.size = sizeof(cmd);
-+	cmd.msg_address = (uintptr_t)msg;
-+
-+	ret = kdbus_cmd_send(conn->fd, &cmd);
-+	if (ret < 0) {
-+		kdbus_printf("error sending message: %d (%m)\n", ret);
-+		return ret;
-+	}
-+
-+	return 0;
-+}
-+
-+int kdbus_test_match_bloom(struct kdbus_test_env *env)
-+{
-+	struct {
-+		struct kdbus_cmd_match cmd;
-+		struct {
-+			uint64_t size;
-+			uint64_t type;
-+			uint8_t data_gen0[64];
-+			uint8_t data_gen1[64];
-+		} item;
-+	} buf;
-+	struct kdbus_conn *conn;
-+	struct kdbus_msg *msg;
-+	uint64_t cookie = 0xf000f00f;
-+	uint8_t filter[64];
-+	int ret;
-+
-+	/* install the match rule */
-+	memset(&buf, 0, sizeof(buf));
-+	buf.cmd.size = sizeof(buf);
-+
-+	buf.item.size = sizeof(buf.item);
-+	buf.item.type = KDBUS_ITEM_BLOOM_MASK;
-+	buf.item.data_gen0[0] = 0x55;
-+	buf.item.data_gen0[63] = 0x80;
-+
-+	buf.item.data_gen1[1] = 0xaa;
-+	buf.item.data_gen1[9] = 0x02;
-+
-+	ret = kdbus_cmd_match_add(env->conn->fd, &buf.cmd);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* create a 2nd connection */
-+	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn != NULL);
-+
-+	/* a message with a 0'ed out filter must not reach the other peer */
-+	memset(filter, 0, sizeof(filter));
-+	ret = send_bloom_filter(conn, ++cookie, filter, sizeof(filter), 0);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_msg_recv(env->conn, &msg, NULL);
-+	ASSERT_RETURN(ret == -EAGAIN);
-+
-+	/* now set the filter to the connection's mask and expect success */
-+	filter[0] = 0x55;
-+	filter[63] = 0x80;
-+	ret = send_bloom_filter(conn, ++cookie, filter, sizeof(filter), 0);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_msg_recv(env->conn, &msg, NULL);
-+	ASSERT_RETURN(ret == 0);
-+	ASSERT_RETURN(msg->cookie == cookie);
-+
-+	/* broaden the filter and try again. this should also succeed. */
-+	filter[0] = 0xff;
-+	filter[8] = 0xff;
-+	filter[63] = 0xff;
-+	ret = send_bloom_filter(conn, ++cookie, filter, sizeof(filter), 0);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_msg_recv(env->conn, &msg, NULL);
-+	ASSERT_RETURN(ret == 0);
-+	ASSERT_RETURN(msg->cookie == cookie);
-+
-+	/* the same filter must not match against bloom generation 1 */
-+	ret = send_bloom_filter(conn, ++cookie, filter, sizeof(filter), 1);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_msg_recv(env->conn, &msg, NULL);
-+	ASSERT_RETURN(ret == -EAGAIN);
-+
-+	/* set a different filter and try again */
-+	filter[1] = 0xaa;
-+	filter[9] = 0x02;
-+	ret = send_bloom_filter(conn, ++cookie, filter, sizeof(filter), 1);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_msg_recv(env->conn, &msg, NULL);
-+	ASSERT_RETURN(ret == 0);
-+	ASSERT_RETURN(msg->cookie == cookie);
-+
-+	kdbus_conn_free(conn);
-+
-+	return TEST_OK;
-+}
-diff --git a/tools/testing/selftests/kdbus/test-message.c b/tools/testing/selftests/kdbus/test-message.c
-new file mode 100644
-index 0000000..563dc85
---- /dev/null
-+++ b/tools/testing/selftests/kdbus/test-message.c
-@@ -0,0 +1,734 @@
-+#include <stdio.h>
-+#include <string.h>
-+#include <fcntl.h>
-+#include <stdlib.h>
-+#include <stddef.h>
-+#include <unistd.h>
-+#include <stdint.h>
-+#include <errno.h>
-+#include <assert.h>
-+#include <time.h>
-+#include <stdbool.h>
-+#include <sys/eventfd.h>
-+#include <sys/types.h>
-+#include <sys/wait.h>
-+
-+#include "kdbus-api.h"
-+#include "kdbus-util.h"
-+#include "kdbus-enum.h"
-+#include "kdbus-test.h"
-+
-+/* maximum number of queued messages from the same individual user */
-+#define KDBUS_CONN_MAX_MSGS			256
-+
-+/* maximum number of queued requests waiting for a reply */
-+#define KDBUS_CONN_MAX_REQUESTS_PENDING		128
-+
-+/* maximum message payload size */
-+#define KDBUS_MSG_MAX_PAYLOAD_VEC_SIZE		(2 * 1024UL * 1024UL)
-+
-+int kdbus_test_message_basic(struct kdbus_test_env *env)
-+{
-+	struct kdbus_conn *conn;
-+	struct kdbus_conn *sender;
-+	struct kdbus_msg *msg;
-+	uint64_t cookie = 0x1234abcd5678eeff;
-+	uint64_t offset;
-+	int ret;
-+
-+	sender = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(sender != NULL);
-+
-+	/* create a 2nd connection */
-+	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn != NULL);
-+
-+	ret = kdbus_add_match_empty(conn);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_add_match_empty(sender);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* send over 1st connection */
-+	ret = kdbus_msg_send(sender, NULL, cookie, 0, 0, 0,
-+			     KDBUS_DST_ID_BROADCAST);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* Make sure that we do get our own broadcasts */
-+	ret = kdbus_msg_recv(sender, &msg, &offset);
-+	ASSERT_RETURN(ret == 0);
-+	ASSERT_RETURN(msg->cookie == cookie);
-+
-+	kdbus_msg_free(msg);
-+
-+	/* ... and receive on the 2nd */
-+	ret = kdbus_msg_recv_poll(conn, 100, &msg, &offset);
-+	ASSERT_RETURN(ret == 0);
-+	ASSERT_RETURN(msg->cookie == cookie);
-+
-+	kdbus_msg_free(msg);
-+
-+	/* Msgs that expect a reply must have timeout and cookie */
-+	ret = kdbus_msg_send(sender, NULL, 0, KDBUS_MSG_EXPECT_REPLY,
-+			     0, 0, conn->id);
-+	ASSERT_RETURN(ret == -EINVAL);
-+
-+	/* Faked replies with a valid reply cookie are rejected */
-+	ret = kdbus_msg_send_reply(conn, time(NULL) ^ cookie, sender->id);
-+	ASSERT_RETURN(ret == -EBADSLT);
-+
-+	ret = kdbus_free(conn, offset);
-+	ASSERT_RETURN(ret == 0);
-+
-+	kdbus_conn_free(sender);
-+	kdbus_conn_free(conn);
-+
-+	return TEST_OK;
-+}
-+
-+static int msg_recv_prio(struct kdbus_conn *conn,
-+			 int64_t requested_prio,
-+			 int64_t expected_prio)
-+{
-+	struct kdbus_cmd_recv recv = {
-+		.size = sizeof(recv),
-+		.flags = KDBUS_RECV_USE_PRIORITY,
-+		.priority = requested_prio,
-+	};
-+	struct kdbus_msg *msg;
-+	int ret;
-+
-+	ret = kdbus_cmd_recv(conn->fd, &recv);
-+	if (ret < 0) {
-+		kdbus_printf("error receiving message: %d (%m)\n", -errno);
-+		return ret;
-+	}
-+
-+	msg = (struct kdbus_msg *)(conn->buf + recv.msg.offset);
-+	kdbus_msg_dump(conn, msg);
-+
-+	if (msg->priority != expected_prio) {
-+		kdbus_printf("expected message prio %lld, got %lld\n",
-+			     (unsigned long long) expected_prio,
-+			     (unsigned long long) msg->priority);
-+		return -EINVAL;
-+	}
-+
-+	kdbus_msg_free(msg);
-+	ret = kdbus_free(conn, recv.msg.offset);
-+	if (ret < 0)
-+		return ret;
-+
-+	return 0;
-+}
-+
-+int kdbus_test_message_prio(struct kdbus_test_env *env)
-+{
-+	struct kdbus_conn *a, *b;
-+	uint64_t cookie = 0;
-+
-+	a = kdbus_hello(env->buspath, 0, NULL, 0);
-+	b = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(a && b);
-+
-+	ASSERT_RETURN(kdbus_msg_send(b, NULL, ++cookie, 0, 0,   25, a->id) == 0);
-+	ASSERT_RETURN(kdbus_msg_send(b, NULL, ++cookie, 0, 0, -600, a->id) == 0);
-+	ASSERT_RETURN(kdbus_msg_send(b, NULL, ++cookie, 0, 0,   10, a->id) == 0);
-+	ASSERT_RETURN(kdbus_msg_send(b, NULL, ++cookie, 0, 0,  -35, a->id) == 0);
-+	ASSERT_RETURN(kdbus_msg_send(b, NULL, ++cookie, 0, 0, -100, a->id) == 0);
-+	ASSERT_RETURN(kdbus_msg_send(b, NULL, ++cookie, 0, 0,   20, a->id) == 0);
-+	ASSERT_RETURN(kdbus_msg_send(b, NULL, ++cookie, 0, 0,  -15, a->id) == 0);
-+	ASSERT_RETURN(kdbus_msg_send(b, NULL, ++cookie, 0, 0, -800, a->id) == 0);
-+	ASSERT_RETURN(kdbus_msg_send(b, NULL, ++cookie, 0, 0, -150, a->id) == 0);
-+	ASSERT_RETURN(kdbus_msg_send(b, NULL, ++cookie, 0, 0,   10, a->id) == 0);
-+	ASSERT_RETURN(kdbus_msg_send(b, NULL, ++cookie, 0, 0, -800, a->id) == 0);
-+	ASSERT_RETURN(kdbus_msg_send(b, NULL, ++cookie, 0, 0,  -10, a->id) == 0);
-+
-+	ASSERT_RETURN(msg_recv_prio(a, -200, -800) == 0);
-+	ASSERT_RETURN(msg_recv_prio(a, -100, -800) == 0);
-+	ASSERT_RETURN(msg_recv_prio(a, -400, -600) == 0);
-+	ASSERT_RETURN(msg_recv_prio(a, -400, -600) == -EAGAIN);
-+	ASSERT_RETURN(msg_recv_prio(a, 10, -150) == 0);
-+	ASSERT_RETURN(msg_recv_prio(a, 10, -100) == 0);
-+
-+	kdbus_printf("--- get priority (all)\n");
-+	ASSERT_RETURN(kdbus_msg_recv(a, NULL, NULL) == 0);
-+
-+	kdbus_conn_free(a);
-+	kdbus_conn_free(b);
-+
-+	return TEST_OK;
-+}
-+
-+static int kdbus_test_notify_kernel_quota(struct kdbus_test_env *env)
-+{
-+	int ret;
-+	unsigned int i;
-+	struct kdbus_conn *conn;
-+	struct kdbus_conn *reader;
-+	struct kdbus_msg *msg = NULL;
-+	struct kdbus_cmd_recv recv = { .size = sizeof(recv) };
-+
-+	reader = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(reader);
-+
-+	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn);
-+
-+	/* Register for ID signals */
-+	ret = kdbus_add_match_id(reader, 0x1, KDBUS_ITEM_ID_ADD,
-+				 KDBUS_MATCH_ID_ANY);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_add_match_id(reader, 0x2, KDBUS_ITEM_ID_REMOVE,
-+				 KDBUS_MATCH_ID_ANY);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* Each iteration two notifications: add and remove ID */
-+	for (i = 0; i < KDBUS_CONN_MAX_MSGS / 2; i++) {
-+		struct kdbus_conn *notifier;
-+
-+		notifier = kdbus_hello(env->buspath, 0, NULL, 0);
-+		ASSERT_RETURN(notifier);
-+
-+		kdbus_conn_free(notifier);
-+	}
-+
-+	/*
-+	 * Now the reader queue is full with kernel notfications,
-+	 * but as a user we still have room to push our messages.
-+	 */
-+	ret = kdbus_msg_send(conn, NULL, 0xdeadbeef, 0, 0, 0, reader->id);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* More ID kernel notifications that will be lost */
-+	kdbus_conn_free(conn);
-+
-+	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn);
-+
-+	kdbus_conn_free(conn);
-+
-+	/*
-+	 * We lost only 3 packets since only signal msgs are
-+	 * accounted. The connection ID add/remove notification
-+	 */
-+	ret = kdbus_cmd_recv(reader->fd, &recv);
-+	ASSERT_RETURN(ret == 0);
-+	ASSERT_RETURN(recv.return_flags & KDBUS_RECV_RETURN_DROPPED_MSGS);
-+	ASSERT_RETURN(recv.dropped_msgs == 3);
-+
-+	msg = (struct kdbus_msg *)(reader->buf + recv.msg.offset);
-+	kdbus_msg_free(msg);
-+
-+	/* Read our queue */
-+	for (i = 0; i < KDBUS_CONN_MAX_MSGS - 1; i++) {
-+		memset(&recv, 0, sizeof(recv));
-+		recv.size = sizeof(recv);
-+
-+		ret = kdbus_cmd_recv(reader->fd, &recv);
-+		ASSERT_RETURN(ret == 0);
-+		ASSERT_RETURN(!(recv.return_flags &
-+			        KDBUS_RECV_RETURN_DROPPED_MSGS));
-+
-+		msg = (struct kdbus_msg *)(reader->buf + recv.msg.offset);
-+		kdbus_msg_free(msg);
-+	}
-+
-+	ret = kdbus_msg_recv(reader, NULL, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_msg_recv(reader, NULL, NULL);
-+	ASSERT_RETURN(ret == -EAGAIN);
-+
-+	kdbus_conn_free(reader);
-+
-+	return 0;
-+}
-+
-+/* Return the number of message successfully sent */
-+static int kdbus_fill_conn_queue(struct kdbus_conn *conn_src,
-+				 uint64_t dst_id,
-+				 unsigned int max_msgs)
-+{
-+	unsigned int i;
-+	uint64_t cookie = 0;
-+	size_t size;
-+	struct kdbus_cmd_send cmd = {};
-+	struct kdbus_msg *msg;
-+	int ret;
-+
-+	size = sizeof(struct kdbus_msg);
-+	msg = malloc(size);
-+	ASSERT_RETURN_VAL(msg, -ENOMEM);
-+
-+	memset(msg, 0, size);
-+	msg->size = size;
-+	msg->src_id = conn_src->id;
-+	msg->dst_id = dst_id;
-+	msg->payload_type = KDBUS_PAYLOAD_DBUS;
-+
-+	cmd.size = sizeof(cmd);
-+	cmd.msg_address = (uintptr_t)msg;
-+
-+	for (i = 0; i < max_msgs; i++) {
-+		msg->cookie = cookie++;
-+		ret = kdbus_cmd_send(conn_src->fd, &cmd);
-+		if (ret < 0)
-+			break;
-+	}
-+
-+	free(msg);
-+
-+	return i;
-+}
-+
-+static int kdbus_test_activator_quota(struct kdbus_test_env *env)
-+{
-+	int ret;
-+	unsigned int i;
-+	unsigned int activator_msgs_count = 0;
-+	uint64_t cookie = time(NULL);
-+	struct kdbus_conn *conn;
-+	struct kdbus_conn *sender;
-+	struct kdbus_conn *activator;
-+	struct kdbus_msg *msg;
-+	uint64_t flags = KDBUS_NAME_REPLACE_EXISTING;
-+	struct kdbus_cmd_recv recv = { .size = sizeof(recv) };
-+	struct kdbus_policy_access access = {
-+		.type = KDBUS_POLICY_ACCESS_USER,
-+		.id = geteuid(),
-+		.access = KDBUS_POLICY_OWN,
-+	};
-+
-+	activator = kdbus_hello_activator(env->buspath, "foo.test.activator",
-+					  &access, 1);
-+	ASSERT_RETURN(activator);
-+
-+	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-+	sender = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn || sender);
-+
-+	ret = kdbus_list(sender, KDBUS_LIST_NAMES |
-+				 KDBUS_LIST_UNIQUE |
-+				 KDBUS_LIST_ACTIVATORS |
-+				 KDBUS_LIST_QUEUED);
-+	ASSERT_RETURN(ret == 0);
-+
-+	for (i = 0; i < KDBUS_CONN_MAX_MSGS; i++) {
-+		ret = kdbus_msg_send(sender, "foo.test.activator",
-+				     cookie++, 0, 0, 0,
-+				     KDBUS_DST_ID_NAME);
-+		if (ret < 0)
-+			break;
-+		activator_msgs_count++;
-+	}
-+
-+	/* we must have at least sent one message */
-+	ASSERT_RETURN_VAL(i > 0, -errno);
-+	ASSERT_RETURN(ret == -ENOBUFS);
-+
-+	/* Good, activator queue is full now */
-+
-+	/* ENXIO on direct send (activators can never be addressed by ID) */
-+	ret = kdbus_msg_send(conn, NULL, cookie++, 0, 0, 0, activator->id);
-+	ASSERT_RETURN(ret == -ENXIO);
-+
-+	/* can't queue more */
-+	ret = kdbus_msg_send(conn, "foo.test.activator", cookie++,
-+			     0, 0, 0, KDBUS_DST_ID_NAME);
-+	ASSERT_RETURN(ret == -ENOBUFS);
-+
-+	/* no match installed, so the broadcast will not inc dropped_msgs */
-+	ret = kdbus_msg_send(sender, NULL, cookie++, 0, 0, 0,
-+			     KDBUS_DST_ID_BROADCAST);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* Check activator queue */
-+	ret = kdbus_cmd_recv(activator->fd, &recv);
-+	ASSERT_RETURN(ret == 0);
-+	ASSERT_RETURN(recv.dropped_msgs == 0);
-+
-+	activator_msgs_count--;
-+
-+	msg = (struct kdbus_msg *)(activator->buf + recv.msg.offset);
-+	kdbus_msg_free(msg);
-+
-+
-+	/* Stage 1) of test check the pool memory quota */
-+
-+	/* Consume the connection pool memory */
-+	for (i = 0; i < KDBUS_CONN_MAX_MSGS; i++) {
-+		ret = kdbus_msg_send(sender, NULL,
-+				     cookie++, 0, 0, 0, conn->id);
-+		if (ret < 0)
-+			break;
-+	}
-+
-+	/* consume one message, so later at least one can be moved */
-+	memset(&recv, 0, sizeof(recv));
-+	recv.size = sizeof(recv);
-+	ret = kdbus_cmd_recv(conn->fd, &recv);
-+	ASSERT_RETURN(ret == 0);
-+	ASSERT_RETURN(recv.dropped_msgs == 0);
-+	msg = (struct kdbus_msg *)(conn->buf + recv.msg.offset);
-+	kdbus_msg_free(msg);
-+
-+	/* Try to acquire the name now */
-+	ret = kdbus_name_acquire(conn, "foo.test.activator", &flags);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* try to read messages and see if we have lost some */
-+	memset(&recv, 0, sizeof(recv));
-+	recv.size = sizeof(recv);
-+	ret = kdbus_cmd_recv(conn->fd, &recv);
-+	ASSERT_RETURN(ret == 0);
-+	ASSERT_RETURN(recv.dropped_msgs != 0);
-+
-+	/* number of dropped msgs < received ones (at least one was moved) */
-+	ASSERT_RETURN(recv.dropped_msgs < activator_msgs_count);
-+
-+	/* Deduct the number of dropped msgs from the activator msgs */
-+	activator_msgs_count -= recv.dropped_msgs;
-+
-+	msg = (struct kdbus_msg *)(activator->buf + recv.msg.offset);
-+	kdbus_msg_free(msg);
-+
-+	/*
-+	 * Release the name and hand it back to activator, now
-+	 * we should have 'activator_msgs_count' msgs again in
-+	 * the activator queue
-+	 */
-+	ret = kdbus_name_release(conn, "foo.test.activator");
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* make sure that we got our previous activator msgs */
-+	ret = kdbus_msg_recv(activator, &msg, NULL);
-+	ASSERT_RETURN(ret == 0);
-+	ASSERT_RETURN(msg->src_id == sender->id);
-+
-+	activator_msgs_count--;
-+
-+	kdbus_msg_free(msg);
-+
-+
-+	/* Stage 2) of test check max message quota */
-+
-+	/* Empty conn queue */
-+	for (i = 0; i < KDBUS_CONN_MAX_MSGS; i++) {
-+		ret = kdbus_msg_recv(conn, NULL, NULL);
-+		if (ret == -EAGAIN)
-+			break;
-+	}
-+
-+	/* fill queue with max msgs quota */
-+	ret = kdbus_fill_conn_queue(sender, conn->id, KDBUS_CONN_MAX_MSGS);
-+	ASSERT_RETURN(ret == KDBUS_CONN_MAX_MSGS);
-+
-+	/* This one is lost but it is not accounted */
-+	ret = kdbus_msg_send(sender, NULL,
-+			     cookie++, 0, 0, 0, conn->id);
-+	ASSERT_RETURN(ret == -ENOBUFS);
-+
-+	/* Acquire the name again */
-+	ret = kdbus_name_acquire(conn, "foo.test.activator", &flags);
-+	ASSERT_RETURN(ret == 0);
-+
-+	memset(&recv, 0, sizeof(recv));
-+	recv.size = sizeof(recv);
-+
-+	/*
-+	 * Try to read messages and make sure that we have lost all
-+	 * the activator messages due to quota checks. Our queue is
-+	 * already full.
-+	 */
-+	ret = kdbus_cmd_recv(conn->fd, &recv);
-+	ASSERT_RETURN(ret == 0);
-+	ASSERT_RETURN(recv.dropped_msgs == activator_msgs_count);
-+
-+	msg = (struct kdbus_msg *)(activator->buf + recv.msg.offset);
-+	kdbus_msg_free(msg);
-+
-+	kdbus_conn_free(sender);
-+	kdbus_conn_free(conn);
-+	kdbus_conn_free(activator);
-+
-+	return 0;
-+}
-+
-+static int kdbus_test_expected_reply_quota(struct kdbus_test_env *env)
-+{
-+	int ret;
-+	unsigned int i, n;
-+	unsigned int count;
-+	uint64_t cookie = 0x1234abcd5678eeff;
-+	struct kdbus_conn *conn;
-+	struct kdbus_conn *connections[9];
-+
-+	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn);
-+
-+	for (i = 0; i < 9; i++) {
-+		connections[i] = kdbus_hello(env->buspath, 0, NULL, 0);
-+		ASSERT_RETURN(connections[i]);
-+	}
-+
-+	count = 0;
-+	/* Send 16 messages to 8 different connections */
-+	for (i = 0; i < 8; i++) {
-+		for (n = 0; n < 16; n++) {
-+			ret = kdbus_msg_send(conn, NULL, cookie++,
-+					     KDBUS_MSG_EXPECT_REPLY,
-+					     100000000ULL, 0,
-+					     connections[i]->id);
-+			if (ret < 0)
-+				break;
-+
-+			count++;
-+		}
-+	}
-+
-+	/*
-+	 * We should have queued at least
-+	 * KDBUS_CONN_MAX_REQUESTS_PENDING method call
-+	 */
-+	ASSERT_RETURN(count == KDBUS_CONN_MAX_REQUESTS_PENDING);
-+
-+	/*
-+	 * Now try to send a message to the last connection,
-+	 * if we have reached KDBUS_CONN_MAX_REQUESTS_PENDING
-+	 * no further requests are allowed
-+	 */
-+	ret = kdbus_msg_send(conn, NULL, cookie++, KDBUS_MSG_EXPECT_REPLY,
-+			     1000000000ULL, 0, connections[8]->id);
-+	ASSERT_RETURN(ret == -EMLINK);
-+
-+	for (i = 0; i < 9; i++)
-+		kdbus_conn_free(connections[i]);
-+
-+	kdbus_conn_free(conn);
-+
-+	return 0;
-+}
-+
-+int kdbus_test_pool_quota(struct kdbus_test_env *env)
-+{
-+	struct kdbus_conn *a, *b, *c;
-+	struct kdbus_cmd_send cmd = {};
-+	struct kdbus_item *item;
-+	struct kdbus_msg *recv_msg;
-+	struct kdbus_msg *msg;
-+	uint64_t cookie = time(NULL);
-+	uint64_t size;
-+	unsigned int i;
-+	char *payload;
-+	int ret;
-+
-+	/* just a guard */
-+	if (POOL_SIZE <= KDBUS_MSG_MAX_PAYLOAD_VEC_SIZE ||
-+	    POOL_SIZE % KDBUS_MSG_MAX_PAYLOAD_VEC_SIZE != 0)
-+		return 0;
-+
-+	payload = calloc(KDBUS_MSG_MAX_PAYLOAD_VEC_SIZE, sizeof(char));
-+	ASSERT_RETURN_VAL(payload, -ENOMEM);
-+
-+	a = kdbus_hello(env->buspath, 0, NULL, 0);
-+	b = kdbus_hello(env->buspath, 0, NULL, 0);
-+	c = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(a && b && c);
-+
-+	size = sizeof(struct kdbus_msg);
-+	size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_vec));
-+
-+	msg = malloc(size);
-+	ASSERT_RETURN_VAL(msg, -ENOMEM);
-+
-+	memset(msg, 0, size);
-+	msg->size = size;
-+	msg->src_id = a->id;
-+	msg->dst_id = c->id;
-+	msg->payload_type = KDBUS_PAYLOAD_DBUS;
-+
-+	item = msg->items;
-+	item->type = KDBUS_ITEM_PAYLOAD_VEC;
-+	item->size = KDBUS_ITEM_HEADER_SIZE + sizeof(struct kdbus_vec);
-+	item->vec.address = (uintptr_t)payload;
-+	item->vec.size = KDBUS_MSG_MAX_PAYLOAD_VEC_SIZE;
-+	item = KDBUS_ITEM_NEXT(item);
-+
-+	cmd.size = sizeof(cmd);
-+	cmd.msg_address = (uintptr_t)msg;
-+
-+	/*
-+	 * Send 2097248 bytes, a user is only allowed to get 33% of half of
-+	 * the free space of the pool, the already used space is
-+	 * accounted as free space
-+	 */
-+	size += KDBUS_MSG_MAX_PAYLOAD_VEC_SIZE;
-+	for (i = size; i < (POOL_SIZE / 2 / 3); i += size) {
-+		msg->cookie = cookie++;
-+
-+		ret = kdbus_cmd_send(a->fd, &cmd);
-+		ASSERT_RETURN_VAL(ret == 0, ret);
-+	}
-+
-+	/* Try to get more than 33% */
-+	msg->cookie = cookie++;
-+	ret = kdbus_cmd_send(a->fd, &cmd);
-+	ASSERT_RETURN(ret == -ENOBUFS);
-+
-+	/* We still can pass small messages */
-+	ret = kdbus_msg_send(b, NULL, cookie++, 0, 0, 0, c->id);
-+	ASSERT_RETURN(ret == 0);
-+
-+	for (i = size; i < (POOL_SIZE / 2 / 3); i += size) {
-+		ret = kdbus_msg_recv(c, &recv_msg, NULL);
-+		ASSERT_RETURN(ret == 0);
-+		ASSERT_RETURN(recv_msg->src_id == a->id);
-+
-+		kdbus_msg_free(recv_msg);
-+	}
-+
-+	ret = kdbus_msg_recv(c, &recv_msg, NULL);
-+	ASSERT_RETURN(ret == 0);
-+	ASSERT_RETURN(recv_msg->src_id == b->id);
-+
-+	kdbus_msg_free(recv_msg);
-+
-+	ret = kdbus_msg_recv(c, NULL, NULL);
-+	ASSERT_RETURN(ret == -EAGAIN);
-+
-+	free(msg);
-+	free(payload);
-+
-+	kdbus_conn_free(c);
-+	kdbus_conn_free(b);
-+	kdbus_conn_free(a);
-+
-+	return 0;
-+}
-+
-+int kdbus_test_message_quota(struct kdbus_test_env *env)
-+{
-+	struct kdbus_conn *a, *b;
-+	uint64_t cookie = 0;
-+	int ret;
-+	int i;
-+
-+	ret = kdbus_test_activator_quota(env);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_test_notify_kernel_quota(env);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_test_pool_quota(env);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_test_expected_reply_quota(env);
-+	ASSERT_RETURN(ret == 0);
-+
-+	a = kdbus_hello(env->buspath, 0, NULL, 0);
-+	b = kdbus_hello(env->buspath, 0, NULL, 0);
-+
-+	ret = kdbus_fill_conn_queue(b, a->id, KDBUS_CONN_MAX_MSGS);
-+	ASSERT_RETURN(ret == KDBUS_CONN_MAX_MSGS);
-+
-+	ret = kdbus_msg_send(b, NULL, ++cookie, 0, 0, 0, a->id);
-+	ASSERT_RETURN(ret == -ENOBUFS);
-+
-+	for (i = 0; i < KDBUS_CONN_MAX_MSGS; ++i) {
-+		ret = kdbus_msg_recv(a, NULL, NULL);
-+		ASSERT_RETURN(ret == 0);
-+	}
-+
-+	ret = kdbus_msg_recv(a, NULL, NULL);
-+	ASSERT_RETURN(ret == -EAGAIN);
-+
-+	ret = kdbus_fill_conn_queue(b, a->id, KDBUS_CONN_MAX_MSGS + 1);
-+	ASSERT_RETURN(ret == KDBUS_CONN_MAX_MSGS);
-+
-+	ret = kdbus_msg_send(b, NULL, ++cookie, 0, 0, 0, a->id);
-+	ASSERT_RETURN(ret == -ENOBUFS);
-+
-+	kdbus_conn_free(a);
-+	kdbus_conn_free(b);
-+
-+	return TEST_OK;
-+}
-+
-+int kdbus_test_memory_access(struct kdbus_test_env *env)
-+{
-+	struct kdbus_conn *a, *b;
-+	struct kdbus_cmd_send cmd = {};
-+	struct kdbus_item *item;
-+	struct kdbus_msg *msg;
-+	uint64_t test_addr = 0;
-+	char line[256];
-+	uint64_t size;
-+	FILE *f;
-+	int ret;
-+
-+	/*
-+	 * Search in /proc/kallsyms for the address of a kernel symbol that
-+	 * should always be there, regardless of the config. Use that address
-+	 * in a PAYLOAD_VEC item and make sure it's inaccessible.
-+	 */
-+
-+	f = fopen("/proc/kallsyms", "r");
-+	if (!f)
-+		return TEST_SKIP;
-+
-+	while (fgets(line, sizeof(line), f)) {
-+		char *s = line;
-+
-+		if (!strsep(&s, " "))
-+			continue;
-+
-+		if (!strsep(&s, " "))
-+			continue;
-+
-+		if (!strncmp(s, "mutex_lock", 10)) {
-+			test_addr = strtoull(line, NULL, 16);
-+			break;
-+		}
-+	}
-+
-+	fclose(f);
-+
-+	if (!test_addr)
-+		return TEST_SKIP;
-+
-+	a = kdbus_hello(env->buspath, 0, NULL, 0);
-+	b = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(a && b);
-+
-+	size = sizeof(struct kdbus_msg);
-+	size += KDBUS_ITEM_SIZE(sizeof(struct kdbus_vec));
-+
-+	msg = alloca(size);
-+	ASSERT_RETURN_VAL(msg, -ENOMEM);
-+
-+	memset(msg, 0, size);
-+	msg->size = size;
-+	msg->src_id = a->id;
-+	msg->dst_id = b->id;
-+	msg->payload_type = KDBUS_PAYLOAD_DBUS;
-+
-+	item = msg->items;
-+	item->type = KDBUS_ITEM_PAYLOAD_VEC;
-+	item->size = KDBUS_ITEM_HEADER_SIZE + sizeof(struct kdbus_vec);
-+	item->vec.address = test_addr;
-+	item->vec.size = sizeof(void*);
-+	item = KDBUS_ITEM_NEXT(item);
-+
-+	cmd.size = sizeof(cmd);
-+	cmd.msg_address = (uintptr_t)msg;
-+
-+	ret = kdbus_cmd_send(a->fd, &cmd);
-+	ASSERT_RETURN(ret == -EFAULT);
-+
-+	kdbus_conn_free(b);
-+	kdbus_conn_free(a);
-+
-+	return 0;
-+}
-diff --git a/tools/testing/selftests/kdbus/test-metadata-ns.c b/tools/testing/selftests/kdbus/test-metadata-ns.c
-new file mode 100644
-index 0000000..1f6edc0
---- /dev/null
-+++ b/tools/testing/selftests/kdbus/test-metadata-ns.c
-@@ -0,0 +1,500 @@
-+/*
-+ * Test metadata in new namespaces. Even if our tests can run
-+ * in a namespaced setup, this test is necessary so we can inspect
-+ * metadata on the same kdbusfs but between multiple namespaces
-+ */
-+
-+#include <stdio.h>
-+#include <string.h>
-+#include <sched.h>
-+#include <time.h>
-+#include <fcntl.h>
-+#include <stdlib.h>
-+#include <stddef.h>
-+#include <unistd.h>
-+#include <stdint.h>
-+#include <errno.h>
-+#include <assert.h>
-+#include <signal.h>
-+#include <sys/wait.h>
-+#include <sys/prctl.h>
-+#include <sys/eventfd.h>
-+#include <sys/syscall.h>
-+#include <sys/capability.h>
-+#include <linux/sched.h>
-+
-+#include "kdbus-test.h"
-+#include "kdbus-util.h"
-+#include "kdbus-enum.h"
-+
-+static const struct kdbus_creds privileged_creds = {};
-+
-+static const struct kdbus_creds unmapped_creds = {
-+	.uid	= UNPRIV_UID,
-+	.euid	= UNPRIV_UID,
-+	.suid	= UNPRIV_UID,
-+	.fsuid	= UNPRIV_UID,
-+	.gid	= UNPRIV_GID,
-+	.egid	= UNPRIV_GID,
-+	.sgid	= UNPRIV_GID,
-+	.fsgid	= UNPRIV_GID,
-+};
-+
-+static const struct kdbus_pids unmapped_pids = {};
-+
-+/* Get only the first item */
-+static struct kdbus_item *kdbus_get_item(struct kdbus_msg *msg,
-+					 uint64_t type)
-+{
-+	struct kdbus_item *item;
-+
-+	KDBUS_ITEM_FOREACH(item, msg, items)
-+		if (item->type == type)
-+			return item;
-+
-+	return NULL;
-+}
-+
-+static int kdbus_match_kdbus_creds(struct kdbus_msg *msg,
-+				   const struct kdbus_creds *expected_creds)
-+{
-+	struct kdbus_item *item;
-+
-+	item = kdbus_get_item(msg, KDBUS_ITEM_CREDS);
-+	ASSERT_RETURN(item);
-+
-+	ASSERT_RETURN(memcmp(&item->creds, expected_creds,
-+			     sizeof(struct kdbus_creds)) == 0);
-+
-+	return 0;
-+}
-+
-+static int kdbus_match_kdbus_pids(struct kdbus_msg *msg,
-+				  const struct kdbus_pids *expected_pids)
-+{
-+	struct kdbus_item *item;
-+
-+	item = kdbus_get_item(msg, KDBUS_ITEM_PIDS);
-+	ASSERT_RETURN(item);
-+
-+	ASSERT_RETURN(memcmp(&item->pids, expected_pids,
-+			     sizeof(struct kdbus_pids)) == 0);
-+
-+	return 0;
-+}
-+
-+static int __kdbus_clone_userns_test(const char *bus,
-+				     struct kdbus_conn *conn,
-+				     uint64_t grandpa_pid,
-+				     int signal_fd)
-+{
-+	int clone_ret;
-+	int ret;
-+	struct kdbus_msg *msg = NULL;
-+	const struct kdbus_item *item;
-+	uint64_t cookie = time(NULL) ^ 0xdeadbeef;
-+	struct kdbus_conn *unpriv_conn = NULL;
-+	struct kdbus_pids parent_pids = {
-+		.pid = getppid(),
-+		.tid = getppid(),
-+		.ppid = grandpa_pid,
-+	};
-+
-+	ret = drop_privileges(UNPRIV_UID, UNPRIV_GID);
-+	ASSERT_EXIT(ret == 0);
-+
-+	unpriv_conn = kdbus_hello(bus, 0, NULL, 0);
-+	ASSERT_EXIT(unpriv_conn);
-+
-+	ret = kdbus_add_match_empty(unpriv_conn);
-+	ASSERT_EXIT(ret == 0);
-+
-+	/*
-+	 * ping privileged connection from this new unprivileged
-+	 * one
-+	 */
-+
-+	ret = kdbus_msg_send(unpriv_conn, NULL, cookie, 0, 0,
-+			     0, conn->id);
-+	ASSERT_EXIT(ret == 0);
-+
-+	/*
-+	 * Since we just dropped privileges, the dumpable flag
-+	 * was just cleared which makes the /proc/$clone_child/uid_map
-+	 * to be owned by root, hence any userns uid mapping will fail
-+	 * with -EPERM since the mapping will be done by uid 65534.
-+	 *
-+	 * To avoid this set the dumpable flag again which makes
-+	 * procfs update the /proc/$clone_child/ inodes owner to 65534.
-+	 *
-+	 * Using this we will be able write to /proc/$clone_child/uid_map
-+	 * as uid 65534 and map the uid 65534 to 0 inside the user namespace.
-+	 */
-+	ret = prctl(PR_SET_DUMPABLE, SUID_DUMP_USER);
-+	ASSERT_EXIT(ret == 0);
-+
-+	/* Make child privileged in its new userns and run tests */
-+
-+	ret = RUN_CLONE_CHILD(&clone_ret,
-+			      SIGCHLD | CLONE_NEWUSER | CLONE_NEWPID,
-+	({ 0;  /* Clone setup, nothing */ }),
-+	({
-+		eventfd_t event_status = 0;
-+		struct kdbus_conn *userns_conn;
-+
-+		/* ping connection from the new user namespace */
-+		userns_conn = kdbus_hello(bus, 0, NULL, 0);
-+		ASSERT_EXIT(userns_conn);
-+
-+		ret = kdbus_add_match_empty(userns_conn);
-+		ASSERT_EXIT(ret == 0);
-+
-+		cookie++;
-+		ret = kdbus_msg_send(userns_conn, NULL, cookie,
-+				     0, 0, 0, conn->id);
-+		ASSERT_EXIT(ret == 0);
-+
-+		/* Parent did send */
-+		ret = eventfd_read(signal_fd, &event_status);
-+		ASSERT_RETURN(ret >= 0 && event_status == 1);
-+
-+		/*
-+		 * Receive from privileged connection
-+		 */
-+		kdbus_printf("Privileged → unprivileged/privileged "
-+			     "in its userns "
-+			     "(different userns and pidns):\n");
-+		ret = kdbus_msg_recv_poll(userns_conn, 300, &msg, NULL);
-+		ASSERT_EXIT(ret == 0);
-+		ASSERT_EXIT(msg->dst_id == userns_conn->id);
-+
-+		item = kdbus_get_item(msg, KDBUS_ITEM_CAPS);
-+		ASSERT_EXIT(item);
-+
-+		/* uid/gid not mapped, so we have unpriv cached creds */
-+		ret = kdbus_match_kdbus_creds(msg, &unmapped_creds);
-+		ASSERT_EXIT(ret == 0);
-+
-+		/*
-+		 * Diffent pid namepsaces. This is the child pidns
-+		 * so it should not see its parent kdbus_pids
-+		 */
-+		ret = kdbus_match_kdbus_pids(msg, &unmapped_pids);
-+		ASSERT_EXIT(ret == 0);
-+
-+		kdbus_msg_free(msg);
-+
-+
-+		/*
-+		 * Receive broadcast from privileged connection
-+		 */
-+		kdbus_printf("Privileged → unprivileged/privileged "
-+			     "in its userns "
-+			     "(different userns and pidns):\n");
-+		ret = kdbus_msg_recv_poll(userns_conn, 300, &msg, NULL);
-+		ASSERT_EXIT(ret == 0);
-+		ASSERT_EXIT(msg->dst_id == KDBUS_DST_ID_BROADCAST);
-+
-+		item = kdbus_get_item(msg, KDBUS_ITEM_CAPS);
-+		ASSERT_EXIT(item);
-+
-+		/* uid/gid not mapped, so we have unpriv cached creds */
-+		ret = kdbus_match_kdbus_creds(msg, &unmapped_creds);
-+		ASSERT_EXIT(ret == 0);
-+
-+		/*
-+		 * Diffent pid namepsaces. This is the child pidns
-+		 * so it should not see its parent kdbus_pids
-+		 */
-+		ret = kdbus_match_kdbus_pids(msg, &unmapped_pids);
-+		ASSERT_EXIT(ret == 0);
-+
-+		kdbus_msg_free(msg);
-+
-+		kdbus_conn_free(userns_conn);
-+	}),
-+	({
-+		/* Parent setup map child uid/gid */
-+		ret = userns_map_uid_gid(pid, "0 65534 1", "0 65534 1");
-+		ASSERT_EXIT(ret == 0);
-+	}),
-+	({ 0; }));
-+	/* Unprivileged was not able to create user namespace */
-+	if (clone_ret == -EPERM) {
-+		kdbus_printf("-- CLONE_NEWUSER TEST Failed for "
-+			     "uid: %u\n -- Make sure that your kernel "
-+			     "do not allow CLONE_NEWUSER for "
-+			     "unprivileged users\n", UNPRIV_UID);
-+		ret = 0;
-+		goto out;
-+	}
-+
-+	ASSERT_EXIT(ret == 0);
-+
-+
-+	/*
-+	 * Receive from privileged connection
-+	 */
-+	kdbus_printf("\nPrivileged → unprivileged (same namespaces):\n");
-+	ret = kdbus_msg_recv_poll(unpriv_conn, 300, &msg, NULL);
-+
-+	ASSERT_EXIT(ret == 0);
-+	ASSERT_EXIT(msg->dst_id == unpriv_conn->id);
-+
-+	/* will get the privileged creds */
-+	ret = kdbus_match_kdbus_creds(msg, &privileged_creds);
-+	ASSERT_EXIT(ret == 0);
-+
-+	/* Same pidns so will get the kdbus_pids */
-+	ret = kdbus_match_kdbus_pids(msg, &parent_pids);
-+	ASSERT_RETURN(ret == 0);
-+
-+	kdbus_msg_free(msg);
-+
-+
-+	/*
-+	 * Receive broadcast from privileged connection
-+	 */
-+	kdbus_printf("\nPrivileged → unprivileged (same namespaces):\n");
-+	ret = kdbus_msg_recv_poll(unpriv_conn, 300, &msg, NULL);
-+
-+	ASSERT_EXIT(ret == 0);
-+	ASSERT_EXIT(msg->dst_id == KDBUS_DST_ID_BROADCAST);
-+
-+	/* will get the privileged creds */
-+	ret = kdbus_match_kdbus_creds(msg, &privileged_creds);
-+	ASSERT_EXIT(ret == 0);
-+
-+	ret = kdbus_match_kdbus_pids(msg, &parent_pids);
-+	ASSERT_RETURN(ret == 0);
-+
-+	kdbus_msg_free(msg);
-+
-+out:
-+	kdbus_conn_free(unpriv_conn);
-+
-+	return ret;
-+}
-+
-+static int kdbus_clone_userns_test(const char *bus,
-+				   struct kdbus_conn *conn)
-+{
-+	int ret, status, efd;
-+	pid_t pid, ppid;
-+	uint64_t unpriv_conn_id, userns_conn_id;
-+	struct kdbus_msg *msg;
-+	const struct kdbus_item *item;
-+	struct kdbus_pids expected_pids;
-+	struct kdbus_conn *monitor;
-+
-+	kdbus_printf("STARTING TEST 'metadata-ns'.\n");
-+
-+	monitor = kdbus_hello(bus, KDBUS_HELLO_MONITOR, NULL, 0);
-+	ASSERT_EXIT(monitor);
-+
-+	/*
-+	 * parent will signal to child that is in its
-+	 * userns to read its queue
-+	 */
-+	efd = eventfd(0, EFD_CLOEXEC);
-+	ASSERT_RETURN_VAL(efd >= 0, efd);
-+
-+	ppid = getppid();
-+
-+	pid = fork();
-+	ASSERT_RETURN_VAL(pid >= 0, -errno);
-+
-+	if (pid == 0) {
-+		ret = prctl(PR_SET_PDEATHSIG, SIGKILL);
-+		ASSERT_EXIT_VAL(ret == 0, -errno);
-+
-+		ret = __kdbus_clone_userns_test(bus, conn, ppid, efd);
-+		_exit(ret);
-+	}
-+
-+
-+	/* Phase 1) privileged receives from unprivileged */
-+
-+	/*
-+	 * Receive from the unprivileged child
-+	 */
-+	kdbus_printf("\nUnprivileged → privileged (same namespaces):\n");
-+	ret = kdbus_msg_recv_poll(conn, 300, &msg, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	unpriv_conn_id = msg->src_id;
-+
-+	/* Unprivileged user */
-+	ret = kdbus_match_kdbus_creds(msg, &unmapped_creds);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* Set the expected creds_pids */
-+	expected_pids = (struct kdbus_pids) {
-+		.pid = pid,
-+		.tid = pid,
-+		.ppid = getpid(),
-+	};
-+	ret = kdbus_match_kdbus_pids(msg, &expected_pids);
-+	ASSERT_RETURN(ret == 0);
-+
-+	kdbus_msg_free(msg);
-+
-+
-+	/*
-+	 * Receive from the unprivileged that is in his own
-+	 * userns and pidns
-+	 */
-+
-+	kdbus_printf("\nUnprivileged/privileged in its userns → privileged "
-+		     "(different userns and pidns)\n");
-+	ret = kdbus_msg_recv_poll(conn, 300, &msg, NULL);
-+	if (ret == -ETIMEDOUT)
-+		/* perhaps unprivileged userns is not allowed */
-+		goto wait;
-+
-+	ASSERT_RETURN(ret == 0);
-+
-+	userns_conn_id = msg->src_id;
-+
-+	item = kdbus_get_item(msg, KDBUS_ITEM_CAPS);
-+	ASSERT_RETURN(item);
-+
-+	/*
-+	 * Compare received items, creds must be translated into
-+	 * the receiver user namespace, so the user is unprivileged
-+	 */
-+	ret = kdbus_match_kdbus_creds(msg, &unmapped_creds);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/*
-+	 * We should have the kdbus_pids since we are the parent
-+	 * pidns
-+	 */
-+	item = kdbus_get_item(msg, KDBUS_ITEM_PIDS);
-+	ASSERT_RETURN(item);
-+
-+	ASSERT_RETURN(memcmp(&item->pids, &unmapped_pids,
-+			     sizeof(struct kdbus_pids)) != 0);
-+
-+	/*
-+	 * Parent pid of the unprivileged/privileged in its userns
-+	 * is the unprivileged child pid that was forked here.
-+	 */
-+	ASSERT_RETURN((uint64_t)pid == item->pids.ppid);
-+
-+	kdbus_msg_free(msg);
-+
-+
-+	/* Phase 2) Privileged connection sends now 3 packets */
-+
-+	/*
-+	 * Sending to unprivileged connections a unicast
-+	 */
-+	ret = kdbus_msg_send(conn, NULL, 0xdeadbeef, 0, 0,
-+			     0, unpriv_conn_id);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* signal to child that is in its userns */
-+	ret = eventfd_write(efd, 1);
-+	ASSERT_EXIT(ret == 0);
-+
-+	/*
-+	 * Sending to unprivileged/privilged in its userns
-+	 * connections a unicast
-+	 */
-+	ret = kdbus_msg_send(conn, NULL, 0xdeadbeef, 0, 0,
-+			     0, userns_conn_id);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/*
-+	 * Sending to unprivileged connections a broadcast
-+	 */
-+	ret = kdbus_msg_send(conn, NULL, 0xdeadbeef, 0, 0,
-+			     0, KDBUS_DST_ID_BROADCAST);
-+	ASSERT_RETURN(ret == 0);
-+
-+
-+wait:
-+	ret = waitpid(pid, &status, 0);
-+	ASSERT_RETURN(ret >= 0);
-+
-+	ASSERT_RETURN(WIFEXITED(status))
-+	ASSERT_RETURN(!WEXITSTATUS(status));
-+
-+	/* Dump monitor queue */
-+	kdbus_printf("\n\nMonitor queue:\n");
-+	for (;;) {
-+		ret = kdbus_msg_recv_poll(monitor, 100, &msg, NULL);
-+		if (ret < 0)
-+			break;
-+
-+		if (msg->payload_type == KDBUS_PAYLOAD_DBUS) {
-+			/*
-+			 * Parent pidns should see all the
-+			 * pids
-+			 */
-+			item = kdbus_get_item(msg, KDBUS_ITEM_PIDS);
-+			ASSERT_RETURN(item);
-+
-+			ASSERT_RETURN(item->pids.pid != 0 &&
-+				      item->pids.tid != 0 &&
-+				      item->pids.ppid != 0);
-+		}
-+
-+		kdbus_msg_free(msg);
-+	}
-+
-+	kdbus_conn_free(monitor);
-+	close(efd);
-+
-+	return 0;
-+}
-+
-+int kdbus_test_metadata_ns(struct kdbus_test_env *env)
-+{
-+	int ret;
-+	struct kdbus_conn *holder, *conn;
-+	struct kdbus_policy_access policy_access = {
-+		/* Allow world so we can inspect metadata in namespace */
-+		.type = KDBUS_POLICY_ACCESS_WORLD,
-+		.id = geteuid(),
-+		.access = KDBUS_POLICY_TALK,
-+	};
-+
-+	/*
-+	 * We require user-namespaces and all uids/gids
-+	 * should be mapped (we can just require the necessary ones)
-+	 */
-+	if (!config_user_ns_is_enabled() ||
-+	    !all_uids_gids_are_mapped())
-+		return TEST_SKIP;
-+
-+	ret = test_is_capable(CAP_SETUID, CAP_SETGID, CAP_SYS_ADMIN, -1);
-+	ASSERT_RETURN(ret >= 0);
-+
-+	/* no enough privileges, SKIP test */
-+	if (!ret)
-+		return TEST_SKIP;
-+
-+	holder = kdbus_hello_registrar(env->buspath, "com.example.metadata",
-+				       &policy_access, 1,
-+				       KDBUS_HELLO_POLICY_HOLDER);
-+	ASSERT_RETURN(holder);
-+
-+	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn);
-+
-+	ret = kdbus_add_match_empty(conn);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_name_acquire(conn, "com.example.metadata", NULL);
-+	ASSERT_EXIT(ret >= 0);
-+
-+	ret = kdbus_clone_userns_test(env->buspath, conn);
-+	ASSERT_RETURN(ret == 0);
-+
-+	kdbus_conn_free(holder);
-+	kdbus_conn_free(conn);
-+
-+	return TEST_OK;
-+}
-diff --git a/tools/testing/selftests/kdbus/test-monitor.c b/tools/testing/selftests/kdbus/test-monitor.c
-new file mode 100644
-index 0000000..e00d738
---- /dev/null
-+++ b/tools/testing/selftests/kdbus/test-monitor.c
-@@ -0,0 +1,176 @@
-+#include <stdio.h>
-+#include <string.h>
-+#include <time.h>
-+#include <fcntl.h>
-+#include <stdlib.h>
-+#include <stddef.h>
-+#include <unistd.h>
-+#include <stdint.h>
-+#include <stdbool.h>
-+#include <errno.h>
-+#include <assert.h>
-+#include <signal.h>
-+#include <sys/time.h>
-+#include <sys/mman.h>
-+#include <sys/capability.h>
-+#include <sys/wait.h>
-+
-+#include "kdbus-util.h"
-+#include "kdbus-enum.h"
-+
-+#include "kdbus-util.h"
-+#include "kdbus-enum.h"
-+#include "kdbus-test.h"
-+
-+int kdbus_test_monitor(struct kdbus_test_env *env)
-+{
-+	struct kdbus_conn *monitor, *conn;
-+	unsigned int cookie = 0xdeadbeef;
-+	struct kdbus_msg *msg;
-+	uint64_t offset = 0;
-+	int ret;
-+
-+	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn);
-+
-+	/* add matches to make sure the monitor do not trigger an item add or
-+	 * remove on connect and disconnect, respectively.
-+	 */
-+	ret = kdbus_add_match_id(conn, 0x1, KDBUS_ITEM_ID_ADD,
-+				 KDBUS_MATCH_ID_ANY);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_add_match_id(conn, 0x2, KDBUS_ITEM_ID_REMOVE,
-+				 KDBUS_MATCH_ID_ANY);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* register a monitor */
-+	monitor = kdbus_hello(env->buspath, KDBUS_HELLO_MONITOR, NULL, 0);
-+	ASSERT_RETURN(monitor);
-+
-+	/* make sure we did not receive a monitor connect notification */
-+	ret = kdbus_msg_recv(conn, &msg, &offset);
-+	ASSERT_RETURN(ret == -EAGAIN);
-+
-+	/* check that a monitor cannot acquire a name */
-+	ret = kdbus_name_acquire(monitor, "foo.bar.baz", NULL);
-+	ASSERT_RETURN(ret == -EOPNOTSUPP);
-+
-+	ret = kdbus_msg_send(env->conn, NULL, cookie, 0, 0,  0, conn->id);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* the recipient should have gotten the message */
-+	ret = kdbus_msg_recv(conn, &msg, &offset);
-+	ASSERT_RETURN(ret == 0);
-+	ASSERT_RETURN(msg->cookie == cookie);
-+	kdbus_msg_free(msg);
-+	kdbus_free(conn, offset);
-+
-+	/* and so should the monitor */
-+	ret = kdbus_msg_recv(monitor, &msg, &offset);
-+	ASSERT_RETURN(ret == 0);
-+	ASSERT_RETURN(msg->cookie == cookie);
-+
-+	kdbus_msg_free(msg);
-+	kdbus_free(monitor, offset);
-+
-+	/* Installing matches for monitors must fais must fail */
-+	ret = kdbus_add_match_empty(monitor);
-+	ASSERT_RETURN(ret == -EOPNOTSUPP);
-+
-+	cookie++;
-+	ret = kdbus_msg_send(env->conn, NULL, cookie, 0, 0, 0,
-+			     KDBUS_DST_ID_BROADCAST);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* The monitor should get the message. */
-+	ret = kdbus_msg_recv_poll(monitor, 100, &msg, &offset);
-+	ASSERT_RETURN(ret == 0);
-+	ASSERT_RETURN(msg->cookie == cookie);
-+
-+	kdbus_msg_free(msg);
-+	kdbus_free(monitor, offset);
-+
-+	/*
-+	 * Since we are the only monitor, update the attach flags
-+	 * and tell we are not interessted in attach flags recv
-+	 */
-+
-+	ret = kdbus_conn_update_attach_flags(monitor,
-+					     _KDBUS_ATTACH_ALL,
-+					     0);
-+	ASSERT_RETURN(ret == 0);
-+
-+	cookie++;
-+	ret = kdbus_msg_send(env->conn, NULL, cookie, 0, 0, 0,
-+			     KDBUS_DST_ID_BROADCAST);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_msg_recv_poll(monitor, 100, &msg, &offset);
-+	ASSERT_RETURN(ret == 0);
-+	ASSERT_RETURN(msg->cookie == cookie);
-+
-+	ret = kdbus_item_in_message(msg, KDBUS_ITEM_TIMESTAMP);
-+	ASSERT_RETURN(ret == 0);
-+
-+	kdbus_msg_free(msg);
-+	kdbus_free(monitor, offset);
-+
-+	/*
-+	 * Now we are interested in KDBUS_ITEM_TIMESTAMP and
-+	 * KDBUS_ITEM_CREDS
-+	 */
-+	ret = kdbus_conn_update_attach_flags(monitor,
-+					     _KDBUS_ATTACH_ALL,
-+					     KDBUS_ATTACH_TIMESTAMP |
-+					     KDBUS_ATTACH_CREDS);
-+	ASSERT_RETURN(ret == 0);
-+
-+	cookie++;
-+	ret = kdbus_msg_send(env->conn, NULL, cookie, 0, 0, 0,
-+			     KDBUS_DST_ID_BROADCAST);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_msg_recv_poll(monitor, 100, &msg, &offset);
-+	ASSERT_RETURN(ret == 0);
-+	ASSERT_RETURN(msg->cookie == cookie);
-+
-+	ret = kdbus_item_in_message(msg, KDBUS_ITEM_TIMESTAMP);
-+	ASSERT_RETURN(ret == 1);
-+
-+	ret = kdbus_item_in_message(msg, KDBUS_ITEM_CREDS);
-+	ASSERT_RETURN(ret == 1);
-+
-+	/* the KDBUS_ITEM_PID_COMM was not requested */
-+	ret = kdbus_item_in_message(msg, KDBUS_ITEM_PID_COMM);
-+	ASSERT_RETURN(ret == 0);
-+
-+	kdbus_msg_free(msg);
-+	kdbus_free(monitor, offset);
-+
-+	kdbus_conn_free(monitor);
-+	/* make sure we did not receive a monitor disconnect notification */
-+	ret = kdbus_msg_recv(conn, &msg, &offset);
-+	ASSERT_RETURN(ret == -EAGAIN);
-+
-+	kdbus_conn_free(conn);
-+
-+	/* Make sure that monitor as unprivileged is not allowed */
-+	ret = test_is_capable(CAP_SETUID, CAP_SETGID, -1);
-+	ASSERT_RETURN(ret >= 0);
-+
-+	if (ret && all_uids_gids_are_mapped()) {
-+		ret = RUN_UNPRIVILEGED(UNPRIV_UID, UNPRIV_UID, ({
-+			monitor = kdbus_hello(env->buspath,
-+					      KDBUS_HELLO_MONITOR,
-+					      NULL, 0);
-+			ASSERT_EXIT(!monitor && errno == EPERM);
-+
-+			_exit(EXIT_SUCCESS);
-+		}),
-+		({ 0; }));
-+		ASSERT_RETURN(ret == 0);
-+	}
-+
-+	return TEST_OK;
-+}
-diff --git a/tools/testing/selftests/kdbus/test-names.c b/tools/testing/selftests/kdbus/test-names.c
-new file mode 100644
-index 0000000..e400dc8
---- /dev/null
-+++ b/tools/testing/selftests/kdbus/test-names.c
-@@ -0,0 +1,272 @@
-+#include <stdio.h>
-+#include <string.h>
-+#include <time.h>
-+#include <fcntl.h>
-+#include <stdlib.h>
-+#include <stddef.h>
-+#include <unistd.h>
-+#include <stdint.h>
-+#include <errno.h>
-+#include <assert.h>
-+#include <limits.h>
-+#include <getopt.h>
-+#include <stdbool.h>
-+
-+#include "kdbus-api.h"
-+#include "kdbus-util.h"
-+#include "kdbus-enum.h"
-+#include "kdbus-test.h"
-+
-+struct test_name {
-+	const char *name;
-+	__u64 owner_id;
-+	__u64 flags;
-+};
-+
-+static bool conn_test_names(const struct kdbus_conn *conn,
-+			    const struct test_name *tests,
-+			    unsigned int n_tests)
-+{
-+	struct kdbus_cmd_list cmd_list = {};
-+	struct kdbus_info *name, *list;
-+	unsigned int i;
-+	int ret;
-+
-+	cmd_list.size = sizeof(cmd_list);
-+	cmd_list.flags = KDBUS_LIST_NAMES |
-+			 KDBUS_LIST_ACTIVATORS |
-+			 KDBUS_LIST_QUEUED;
-+
-+	ret = kdbus_cmd_list(conn->fd, &cmd_list);
-+	ASSERT_RETURN(ret == 0);
-+
-+	list = (struct kdbus_info *)(conn->buf + cmd_list.offset);
-+
-+	for (i = 0; i < n_tests; i++) {
-+		const struct test_name *t = tests + i;
-+		bool found = false;
-+
-+		KDBUS_FOREACH(name, list, cmd_list.list_size) {
-+			struct kdbus_item *item;
-+
-+			KDBUS_ITEM_FOREACH(item, name, items) {
-+				if (item->type != KDBUS_ITEM_OWNED_NAME ||
-+				    strcmp(item->name.name, t->name) != 0)
-+					continue;
-+
-+				if (t->owner_id == name->id &&
-+				    t->flags == item->name.flags) {
-+					found = true;
-+					break;
-+				}
-+			}
-+		}
-+
-+		if (!found)
-+			return false;
-+	}
-+
-+	return true;
-+}
-+
-+static bool conn_is_name_primary_owner(const struct kdbus_conn *conn,
-+				       const char *needle)
-+{
-+	struct test_name t = {
-+		.name = needle,
-+		.owner_id = conn->id,
-+		.flags = KDBUS_NAME_PRIMARY,
-+	};
-+
-+	return conn_test_names(conn, &t, 1);
-+}
-+
-+int kdbus_test_name_basic(struct kdbus_test_env *env)
-+{
-+	struct kdbus_conn *conn;
-+	char *name, *dot_name, *invalid_name, *wildcard_name;
-+	int ret;
-+
-+	name = "foo.bla.blaz";
-+	dot_name = ".bla.blaz";
-+	invalid_name = "foo";
-+	wildcard_name = "foo.bla.bl.*";
-+
-+	/* create a 2nd connection */
-+	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn != NULL);
-+
-+	/* acquire name "foo.bar.xxx" name */
-+	ret = kdbus_name_acquire(conn, "foo.bar.xxx", NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* Name is not valid, must fail */
-+	ret = kdbus_name_acquire(env->conn, dot_name, NULL);
-+	ASSERT_RETURN(ret == -EINVAL);
-+
-+	ret = kdbus_name_acquire(env->conn, invalid_name, NULL);
-+	ASSERT_RETURN(ret == -EINVAL);
-+
-+	ret = kdbus_name_acquire(env->conn, wildcard_name, NULL);
-+	ASSERT_RETURN(ret == -EINVAL);
-+
-+	/* check that we can acquire a name */
-+	ret = kdbus_name_acquire(env->conn, name, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = conn_is_name_primary_owner(env->conn, name);
-+	ASSERT_RETURN(ret == true);
-+
-+	/* ... and release it again */
-+	ret = kdbus_name_release(env->conn, name);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = conn_is_name_primary_owner(env->conn, name);
-+	ASSERT_RETURN(ret == false);
-+
-+	/* check that we can't release it again */
-+	ret = kdbus_name_release(env->conn, name);
-+	ASSERT_RETURN(ret == -ESRCH);
-+
-+	/* check that we can't release a name that we don't own */
-+	ret = kdbus_name_release(env->conn, "foo.bar.xxx");
-+	ASSERT_RETURN(ret == -EADDRINUSE);
-+
-+	/* Name is not valid, must fail */
-+	ret = kdbus_name_release(env->conn, dot_name);
-+	ASSERT_RETURN(ret == -ESRCH);
-+
-+	ret = kdbus_name_release(env->conn, invalid_name);
-+	ASSERT_RETURN(ret == -ESRCH);
-+
-+	ret = kdbus_name_release(env->conn, wildcard_name);
-+	ASSERT_RETURN(ret == -ESRCH);
-+
-+	kdbus_conn_free(conn);
-+
-+	return TEST_OK;
-+}
-+
-+int kdbus_test_name_conflict(struct kdbus_test_env *env)
-+{
-+	struct kdbus_conn *conn;
-+	char *name;
-+	int ret;
-+
-+	name = "foo.bla.blaz";
-+
-+	/* create a 2nd connection */
-+	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn != NULL);
-+
-+	/* allow the new connection to own the same name */
-+	/* acquire name from the 1st connection */
-+	ret = kdbus_name_acquire(env->conn, name, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = conn_is_name_primary_owner(env->conn, name);
-+	ASSERT_RETURN(ret == true);
-+
-+	/* check that we also can't acquire it again from the 2nd connection */
-+	ret = kdbus_name_acquire(conn, name, NULL);
-+	ASSERT_RETURN(ret == -EEXIST);
-+
-+	kdbus_conn_free(conn);
-+
-+	return TEST_OK;
-+}
-+
-+int kdbus_test_name_queue(struct kdbus_test_env *env)
-+{
-+	struct kdbus_conn *conn;
-+	struct test_name t[2];
-+	const char *name;
-+	uint64_t flags;
-+	int ret;
-+
-+	name = "foo.bla.blaz";
-+
-+	flags = 0;
-+
-+	/* create a 2nd connection */
-+	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn != NULL);
-+
-+	/* allow the new connection to own the same name */
-+	/* acquire name from the 1st connection */
-+	ret = kdbus_name_acquire(env->conn, name, &flags);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = conn_is_name_primary_owner(env->conn, name);
-+	ASSERT_RETURN(ret == true);
-+
-+	/* queue the 2nd connection as waiting owner */
-+	flags = KDBUS_NAME_QUEUE;
-+	ret = kdbus_name_acquire(conn, name, &flags);
-+	ASSERT_RETURN(ret == 0);
-+	ASSERT_RETURN(flags & KDBUS_NAME_IN_QUEUE);
-+
-+	t[0].name = name;
-+	t[0].owner_id = env->conn->id;
-+	t[0].flags = KDBUS_NAME_PRIMARY;
-+	t[1].name = name;
-+	t[1].owner_id = conn->id;
-+	t[1].flags = KDBUS_NAME_QUEUE | KDBUS_NAME_IN_QUEUE;
-+	ret = conn_test_names(conn, t, 2);
-+	ASSERT_RETURN(ret == true);
-+
-+	/* release name from 1st connection */
-+	ret = kdbus_name_release(env->conn, name);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* now the name should be owned by the 2nd connection */
-+	t[0].name = name;
-+	t[0].owner_id = conn->id;
-+	t[0].flags = KDBUS_NAME_PRIMARY | KDBUS_NAME_QUEUE;
-+	ret = conn_test_names(conn, t, 1);
-+	ASSERT_RETURN(ret == true);
-+
-+	kdbus_conn_free(conn);
-+
-+	return TEST_OK;
-+}
-+
-+int kdbus_test_name_takeover(struct kdbus_test_env *env)
-+{
-+	struct kdbus_conn *conn;
-+	struct test_name t;
-+	const char *name;
-+	uint64_t flags;
-+	int ret;
-+
-+	name = "foo.bla.blaz";
-+
-+	flags = KDBUS_NAME_ALLOW_REPLACEMENT;
-+
-+	/* create a 2nd connection */
-+	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn != NULL);
-+
-+	/* acquire name for 1st connection */
-+	ret = kdbus_name_acquire(env->conn, name, &flags);
-+	ASSERT_RETURN(ret == 0);
-+
-+	t.name = name;
-+	t.owner_id = env->conn->id;
-+	t.flags = KDBUS_NAME_ALLOW_REPLACEMENT | KDBUS_NAME_PRIMARY;
-+	ret = conn_test_names(conn, &t, 1);
-+	ASSERT_RETURN(ret == true);
-+
-+	/* now steal name with 2nd connection */
-+	flags = KDBUS_NAME_REPLACE_EXISTING;
-+	ret = kdbus_name_acquire(conn, name, &flags);
-+	ASSERT_RETURN(ret == 0);
-+	ASSERT_RETURN(flags & KDBUS_NAME_ACQUIRED);
-+
-+	ret = conn_is_name_primary_owner(conn, name);
-+	ASSERT_RETURN(ret == true);
-+
-+	kdbus_conn_free(conn);
-+
-+	return TEST_OK;
-+}
-diff --git a/tools/testing/selftests/kdbus/test-policy-ns.c b/tools/testing/selftests/kdbus/test-policy-ns.c
-new file mode 100644
-index 0000000..3437012
---- /dev/null
-+++ b/tools/testing/selftests/kdbus/test-policy-ns.c
-@@ -0,0 +1,632 @@
-+/*
-+ * Test metadata and policies in new namespaces. Even if our tests
-+ * can run in a namespaced setup, this test is necessary so we can
-+ * inspect policies on the same kdbusfs but between multiple
-+ * namespaces.
-+ *
-+ * Copyright (C) 2014-2015 Djalal Harouni
-+ *
-+ * kdbus is free software; you can redistribute it and/or modify it under
-+ * the terms of the GNU Lesser General Public License as published by the
-+ * Free Software Foundation; either version 2.1 of the License, or (at
-+ * your option) any later version.
-+ */
-+
-+#include <stdio.h>
-+#include <string.h>
-+#include <fcntl.h>
-+#include <pthread.h>
-+#include <sched.h>
-+#include <stdlib.h>
-+#include <stddef.h>
-+#include <stdint.h>
-+#include <stdbool.h>
-+#include <unistd.h>
-+#include <errno.h>
-+#include <signal.h>
-+#include <sys/wait.h>
-+#include <sys/prctl.h>
-+#include <sys/eventfd.h>
-+#include <sys/syscall.h>
-+#include <sys/capability.h>
-+#include <linux/sched.h>
-+
-+#include "kdbus-test.h"
-+#include "kdbus-util.h"
-+#include "kdbus-enum.h"
-+
-+#define MAX_CONN	64
-+#define POLICY_NAME	"foo.test.policy-test"
-+
-+#define KDBUS_CONN_MAX_MSGS_PER_USER            16
-+
-+/**
-+ * Note: this test can be used to inspect policy_db->talk_access_hash
-+ *
-+ * The purpose of these tests:
-+ * 1) Check KDBUS_POLICY_TALK
-+ * 2) Check the cache state: kdbus_policy_db->talk_access_hash
-+ * Should be extended
-+ */
-+
-+/**
-+ * Check a list of connections against conn_db[0]
-+ * conn_db[0] will own the name "foo.test.policy-test" and the
-+ * policy holder connection for this name will update the policy
-+ * entries, so different use cases can be tested.
-+ */
-+static struct kdbus_conn **conn_db;
-+
-+static void *kdbus_recv_echo(void *ptr)
-+{
-+	int ret;
-+	struct kdbus_conn *conn = ptr;
-+
-+	ret = kdbus_msg_recv_poll(conn, 200, NULL, NULL);
-+
-+	return (void *)(long)ret;
-+}
-+
-+/* Trigger kdbus_policy_set() */
-+static int kdbus_set_policy_talk(struct kdbus_conn *conn,
-+				 const char *name,
-+				 uid_t id, unsigned int type)
-+{
-+	int ret;
-+	struct kdbus_policy_access access = {
-+		.type = type,
-+		.id = id,
-+		.access = KDBUS_POLICY_TALK,
-+	};
-+
-+	ret = kdbus_conn_update_policy(conn, name, &access, 1);
-+	ASSERT_RETURN(ret == 0);
-+
-+	return TEST_OK;
-+}
-+
-+/* return TEST_OK or TEST_ERR on failure */
-+static int kdbus_register_same_activator(char *bus, const char *name,
-+					 struct kdbus_conn **c)
-+{
-+	int ret;
-+	struct kdbus_conn *activator;
-+
-+	activator = kdbus_hello_activator(bus, name, NULL, 0);
-+	if (activator) {
-+		*c = activator;
-+		fprintf(stderr, "--- error was able to register name twice '%s'.\n",
-+			name);
-+		return TEST_ERR;
-+	}
-+
-+	ret = -errno;
-+	/* -EEXIST means test succeeded */
-+	if (ret == -EEXIST)
-+		return TEST_OK;
-+
-+	return TEST_ERR;
-+}
-+
-+/* return TEST_OK or TEST_ERR on failure */
-+static int kdbus_register_policy_holder(char *bus, const char *name,
-+					struct kdbus_conn **conn)
-+{
-+	struct kdbus_conn *c;
-+	struct kdbus_policy_access access[2];
-+
-+	access[0].type = KDBUS_POLICY_ACCESS_USER;
-+	access[0].access = KDBUS_POLICY_OWN;
-+	access[0].id = geteuid();
-+
-+	access[1].type = KDBUS_POLICY_ACCESS_WORLD;
-+	access[1].access = KDBUS_POLICY_TALK;
-+	access[1].id = geteuid();
-+
-+	c = kdbus_hello_registrar(bus, name, access, 2,
-+				  KDBUS_HELLO_POLICY_HOLDER);
-+	ASSERT_RETURN(c);
-+
-+	*conn = c;
-+
-+	return TEST_OK;
-+}
-+
-+/**
-+ * Create new threads for receiving from multiple senders,
-+ * The 'conn_db' will be populated by newly created connections.
-+ * Caller should free all allocated connections.
-+ *
-+ * return 0 on success, negative errno on failure.
-+ */
-+static int kdbus_recv_in_threads(const char *bus, const char *name,
-+				 struct kdbus_conn **conn_db)
-+{
-+	int ret;
-+	bool pool_full = false;
-+	unsigned int sent_packets = 0;
-+	unsigned int lost_packets = 0;
-+	unsigned int i, tid;
-+	unsigned long dst_id;
-+	unsigned long cookie = 1;
-+	unsigned int thread_nr = MAX_CONN - 1;
-+	pthread_t thread_id[MAX_CONN - 1] = {'\0'};
-+
-+	dst_id = name ? KDBUS_DST_ID_NAME : conn_db[0]->id;
-+
-+	for (tid = 0, i = 1; tid < thread_nr; tid++, i++) {
-+		ret = pthread_create(&thread_id[tid], NULL,
-+				     kdbus_recv_echo, (void *)conn_db[0]);
-+		if (ret < 0) {
-+			ret = -errno;
-+			kdbus_printf("error pthread_create: %d (%m)\n",
-+				      ret);
-+			break;
-+		}
-+
-+		/* just free before re-using */
-+		kdbus_conn_free(conn_db[i]);
-+		conn_db[i] = NULL;
-+
-+		/* We need to create connections here */
-+		conn_db[i] = kdbus_hello(bus, 0, NULL, 0);
-+		if (!conn_db[i]) {
-+			ret = -errno;
-+			break;
-+		}
-+
-+		ret = kdbus_add_match_empty(conn_db[i]);
-+		if (ret < 0)
-+			break;
-+
-+		ret = kdbus_msg_send(conn_db[i], name, cookie++,
-+				     0, 0, 0, dst_id);
-+		if (ret < 0) {
-+			/*
-+			 * Receivers are not reading their messages,
-+			 * not scheduled ?!
-+			 *
-+			 * So set the pool full here, perhaps the
-+			 * connection pool or queue was full, later
-+			 * recheck receivers errors
-+			 */
-+			if (ret == -ENOBUFS || ret == -EXFULL)
-+				pool_full = true;
-+			break;
-+		}
-+
-+		sent_packets++;
-+	}
-+
-+	for (tid = 0; tid < thread_nr; tid++) {
-+		int thread_ret = 0;
-+
-+		if (thread_id[tid]) {
-+			pthread_join(thread_id[tid], (void *)&thread_ret);
-+			if (thread_ret < 0) {
-+				/* Update only if send did not fail */
-+				if (ret == 0)
-+					ret = thread_ret;
-+
-+				lost_packets++;
-+			}
-+		}
-+	}
-+
-+	/*
-+	 * When sending if we did fail with -ENOBUFS or -EXFULL
-+	 * then we should have set lost_packet and we should at
-+	 * least have sent_packets set to KDBUS_CONN_MAX_MSGS_PER_USER
-+	 */
-+	if (pool_full) {
-+		ASSERT_RETURN(lost_packets > 0);
-+
-+		/*
-+		 * We should at least send KDBUS_CONN_MAX_MSGS_PER_USER
-+		 *
-+		 * For every send operation we create a thread to
-+		 * recv the packet, so we keep the queue clean
-+		 */
-+		ASSERT_RETURN(sent_packets >= KDBUS_CONN_MAX_MSGS_PER_USER);
-+
-+		/*
-+		 * Set ret to zero since we only failed due to
-+		 * the receiving threads that have not been
-+		 * scheduled
-+		 */
-+		ret = 0;
-+	}
-+
-+	return ret;
-+}
-+
-+/* Return: TEST_OK or TEST_ERR on failure */
-+static int kdbus_normal_test(const char *bus, const char *name,
-+			     struct kdbus_conn **conn_db)
-+{
-+	int ret;
-+
-+	ret = kdbus_recv_in_threads(bus, name, conn_db);
-+	ASSERT_RETURN(ret >= 0);
-+
-+	return TEST_OK;
-+}
-+
-+static int kdbus_fork_test_by_id(const char *bus,
-+				 struct kdbus_conn **conn_db,
-+				 int parent_status, int child_status)
-+{
-+	int ret;
-+	pid_t pid;
-+	uint64_t cookie = 0x9876ecba;
-+	struct kdbus_msg *msg = NULL;
-+	uint64_t offset = 0;
-+	int status = 0;
-+
-+	/*
-+	 * If the child_status is not EXIT_SUCCESS, then we expect
-+	 * that sending from the child will fail, thus receiving
-+	 * from parent must error with -ETIMEDOUT, and vice versa.
-+	 */
-+	bool parent_timedout = !!child_status;
-+	bool child_timedout = !!parent_status;
-+
-+	pid = fork();
-+	ASSERT_RETURN_VAL(pid >= 0, pid);
-+
-+	if (pid == 0) {
-+		struct kdbus_conn *conn_src;
-+
-+		ret = prctl(PR_SET_PDEATHSIG, SIGKILL);
-+		ASSERT_EXIT(ret == 0);
-+
-+		ret = drop_privileges(65534, 65534);
-+		ASSERT_EXIT(ret == 0);
-+
-+		conn_src = kdbus_hello(bus, 0, NULL, 0);
-+		ASSERT_EXIT(conn_src);
-+
-+		ret = kdbus_add_match_empty(conn_src);
-+		ASSERT_EXIT(ret == 0);
-+
-+		/*
-+		 * child_status is always checked against send
-+		 * operations, in case it fails always return
-+		 * EXIT_FAILURE.
-+		 */
-+		ret = kdbus_msg_send(conn_src, NULL, cookie,
-+				     0, 0, 0, conn_db[0]->id);
-+		ASSERT_EXIT(ret == child_status);
-+
-+		ret = kdbus_msg_recv_poll(conn_src, 100, NULL, NULL);
-+
-+		kdbus_conn_free(conn_src);
-+
-+		/*
-+		 * Child kdbus_msg_recv_poll() should timeout since
-+		 * the parent_status was set to a non EXIT_SUCCESS
-+		 * value.
-+		 */
-+		if (child_timedout)
-+			_exit(ret == -ETIMEDOUT ? EXIT_SUCCESS : EXIT_FAILURE);
-+
-+		_exit(ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
-+	}
-+
-+	ret = kdbus_msg_recv_poll(conn_db[0], 100, &msg, &offset);
-+	/*
-+	 * If parent_timedout is set then this should fail with
-+	 * -ETIMEDOUT since the child_status was set to a non
-+	 * EXIT_SUCCESS value. Otherwise, assume
-+	 * that kdbus_msg_recv_poll() has succeeded.
-+	 */
-+	if (parent_timedout) {
-+		ASSERT_RETURN_VAL(ret == -ETIMEDOUT, TEST_ERR);
-+
-+		/* timedout no need to continue, we don't have the
-+		 * child connection ID, so just terminate. */
-+		goto out;
-+	} else {
-+		ASSERT_RETURN_VAL(ret == 0, ret);
-+	}
-+
-+	ret = kdbus_msg_send(conn_db[0], NULL, ++cookie,
-+			     0, 0, 0, msg->src_id);
-+	/*
-+	 * parent_status is checked against send operations,
-+	 * on failures always return TEST_ERR.
-+	 */
-+	ASSERT_RETURN_VAL(ret == parent_status, TEST_ERR);
-+
-+	kdbus_msg_free(msg);
-+	kdbus_free(conn_db[0], offset);
-+
-+out:
-+	ret = waitpid(pid, &status, 0);
-+	ASSERT_RETURN_VAL(ret >= 0, ret);
-+
-+	return (status == EXIT_SUCCESS) ? TEST_OK : TEST_ERR;
-+}
-+
-+/*
-+ * Return: TEST_OK, TEST_ERR or TEST_SKIP
-+ * we return TEST_OK only if the children return with the expected
-+ * 'expected_status' that is specified as an argument.
-+ */
-+static int kdbus_fork_test(const char *bus, const char *name,
-+			   struct kdbus_conn **conn_db, int expected_status)
-+{
-+	pid_t pid;
-+	int ret = 0;
-+	int status = 0;
-+
-+	pid = fork();
-+	ASSERT_RETURN_VAL(pid >= 0, pid);
-+
-+	if (pid == 0) {
-+		ret = prctl(PR_SET_PDEATHSIG, SIGKILL);
-+		ASSERT_EXIT(ret == 0);
-+
-+		ret = drop_privileges(65534, 65534);
-+		ASSERT_EXIT(ret == 0);
-+
-+		ret = kdbus_recv_in_threads(bus, name, conn_db);
-+		_exit(ret == expected_status ? EXIT_SUCCESS : EXIT_FAILURE);
-+	}
-+
-+	ret = waitpid(pid, &status, 0);
-+	ASSERT_RETURN(ret >= 0);
-+
-+	return (status == EXIT_SUCCESS) ? TEST_OK : TEST_ERR;
-+}
-+
-+/* Return EXIT_SUCCESS, EXIT_FAILURE or negative errno */
-+static int __kdbus_clone_userns_test(const char *bus,
-+				     const char *name,
-+				     struct kdbus_conn **conn_db,
-+				     int expected_status)
-+{
-+	int efd;
-+	pid_t pid;
-+	int ret = 0;
-+	unsigned int uid = 65534;
-+	int status;
-+
-+	ret = drop_privileges(uid, uid);
-+	ASSERT_RETURN_VAL(ret == 0, ret);
-+
-+	/*
-+	 * Since we just dropped privileges, the dumpable flag was just
-+	 * cleared which makes the /proc/$clone_child/uid_map to be
-+	 * owned by root, hence any userns uid mapping will fail with
-+	 * -EPERM since the mapping will be done by uid 65534.
-+	 *
-+	 * To avoid this set the dumpable flag again which makes procfs
-+	 * update the /proc/$clone_child/ inodes owner to 65534.
-+	 *
-+	 * Using this we will be able write to /proc/$clone_child/uid_map
-+	 * as uid 65534 and map the uid 65534 to 0 inside the user
-+	 * namespace.
-+	 */
-+	ret = prctl(PR_SET_DUMPABLE, SUID_DUMP_USER);
-+	ASSERT_RETURN_VAL(ret == 0, ret);
-+
-+	/* sync parent/child */
-+	efd = eventfd(0, EFD_CLOEXEC);
-+	ASSERT_RETURN_VAL(efd >= 0, efd);
-+
-+	pid = syscall(__NR_clone, SIGCHLD|CLONE_NEWUSER, NULL);
-+	if (pid < 0) {
-+		ret = -errno;
-+		kdbus_printf("error clone: %d (%m)\n", ret);
-+		/*
-+		 * Normal user not allowed to create userns,
-+		 * so nothing to worry about ?
-+		 */
-+		if (ret == -EPERM) {
-+			kdbus_printf("-- CLONE_NEWUSER TEST Failed for uid: %u\n"
-+				"-- Make sure that your kernel do not allow "
-+				"CLONE_NEWUSER for unprivileged users\n"
-+				"-- Upstream Commit: "
-+				"https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=5eaf563e\n",
-+				uid);
-+			ret = 0;
-+		}
-+
-+		return ret;
-+	}
-+
-+	if (pid == 0) {
-+		struct kdbus_conn *conn_src;
-+		eventfd_t event_status = 0;
-+
-+		ret = prctl(PR_SET_PDEATHSIG, SIGKILL);
-+		ASSERT_EXIT(ret == 0);
-+
-+		ret = eventfd_read(efd, &event_status);
-+		ASSERT_EXIT(ret >= 0 && event_status == 1);
-+
-+		/* ping connection from the new user namespace */
-+		conn_src = kdbus_hello(bus, 0, NULL, 0);
-+		ASSERT_EXIT(conn_src);
-+
-+		ret = kdbus_add_match_empty(conn_src);
-+		ASSERT_EXIT(ret == 0);
-+
-+		ret = kdbus_msg_send(conn_src, name, 0xabcd1234,
-+				     0, 0, 0, KDBUS_DST_ID_NAME);
-+		kdbus_conn_free(conn_src);
-+
-+		_exit(ret == expected_status ? EXIT_SUCCESS : EXIT_FAILURE);
-+	}
-+
-+	ret = userns_map_uid_gid(pid, "0 65534 1", "0 65534 1");
-+	ASSERT_RETURN_VAL(ret == 0, ret);
-+
-+	/* Tell child we are ready */
-+	ret = eventfd_write(efd, 1);
-+	ASSERT_RETURN_VAL(ret == 0, ret);
-+
-+	ret = waitpid(pid, &status, 0);
-+	ASSERT_RETURN_VAL(ret >= 0, ret);
-+
-+	close(efd);
-+
-+	return status == EXIT_SUCCESS ? TEST_OK : TEST_ERR;
-+}
-+
-+static int kdbus_clone_userns_test(const char *bus,
-+				   const char *name,
-+				   struct kdbus_conn **conn_db,
-+				   int expected_status)
-+{
-+	pid_t pid;
-+	int ret = 0;
-+	int status;
-+
-+	pid = fork();
-+	ASSERT_RETURN_VAL(pid >= 0, -errno);
-+
-+	if (pid == 0) {
-+		ret = prctl(PR_SET_PDEATHSIG, SIGKILL);
-+		if (ret < 0)
-+			_exit(EXIT_FAILURE);
-+
-+		ret = __kdbus_clone_userns_test(bus, name, conn_db,
-+						expected_status);
-+		_exit(ret);
-+	}
-+
-+	/*
-+	 * Receive in the original (root privileged) user namespace,
-+	 * must fail with -ETIMEDOUT.
-+	 */
-+	ret = kdbus_msg_recv_poll(conn_db[0], 100, NULL, NULL);
-+	ASSERT_RETURN_VAL(ret == -ETIMEDOUT, ret);
-+
-+	ret = waitpid(pid, &status, 0);
-+	ASSERT_RETURN_VAL(ret >= 0, ret);
-+
-+	return (status == EXIT_SUCCESS) ? TEST_OK : TEST_ERR;
-+}
-+
-+int kdbus_test_policy_ns(struct kdbus_test_env *env)
-+{
-+	int i;
-+	int ret;
-+	struct kdbus_conn *activator = NULL;
-+	struct kdbus_conn *policy_holder = NULL;
-+	char *bus = env->buspath;
-+
-+	ret = test_is_capable(CAP_SETUID, CAP_SETGID, -1);
-+	ASSERT_RETURN(ret >= 0);
-+
-+	/* no enough privileges, SKIP test */
-+	if (!ret)
-+		return TEST_SKIP;
-+
-+	/* we require user-namespaces */
-+	if (access("/proc/self/uid_map", F_OK) != 0)
-+		return TEST_SKIP;
-+
-+	/* uids/gids must be mapped */
-+	if (!all_uids_gids_are_mapped())
-+		return TEST_SKIP;
-+
-+	conn_db = calloc(MAX_CONN, sizeof(struct kdbus_conn *));
-+	ASSERT_RETURN(conn_db);
-+
-+	memset(conn_db, 0, MAX_CONN * sizeof(struct kdbus_conn *));
-+
-+	conn_db[0] = kdbus_hello(bus, 0, NULL, 0);
-+	ASSERT_RETURN(conn_db[0]);
-+
-+	ret = kdbus_add_match_empty(conn_db[0]);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_fork_test_by_id(bus, conn_db, -EPERM, -EPERM);
-+	ASSERT_EXIT(ret == 0);
-+
-+	ret = kdbus_register_policy_holder(bus, POLICY_NAME,
-+					   &policy_holder);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* Try to register the same name with an activator */
-+	ret = kdbus_register_same_activator(bus, POLICY_NAME,
-+					    &activator);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* Acquire POLICY_NAME */
-+	ret = kdbus_name_acquire(conn_db[0], POLICY_NAME, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_normal_test(bus, POLICY_NAME, conn_db);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_list(conn_db[0], KDBUS_LIST_NAMES |
-+				     KDBUS_LIST_UNIQUE |
-+				     KDBUS_LIST_ACTIVATORS |
-+				     KDBUS_LIST_QUEUED);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_fork_test(bus, POLICY_NAME, conn_db, EXIT_SUCCESS);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/*
-+	 * children connections are able to talk to conn_db[0] since
-+	 * current POLICY_NAME TALK type is KDBUS_POLICY_ACCESS_WORLD,
-+	 * so expect EXIT_SUCCESS when sending from child. However,
-+	 * since the child's connection does not own any well-known
-+	 * name, The parent connection conn_db[0] should fail with
-+	 * -EPERM but since it is a privileged bus user the TALK is
-+	 *  allowed.
-+	 */
-+	ret = kdbus_fork_test_by_id(bus, conn_db,
-+				    EXIT_SUCCESS, EXIT_SUCCESS);
-+	ASSERT_EXIT(ret == 0);
-+
-+	/*
-+	 * Connections that can talk are perhaps being destroyed now.
-+	 * Restrict the policy and purge cache entries where the
-+	 * conn_db[0] is the destination.
-+	 *
-+	 * Now only connections with uid == 0 are allowed to talk.
-+	 */
-+	ret = kdbus_set_policy_talk(policy_holder, POLICY_NAME,
-+				    geteuid(), KDBUS_POLICY_ACCESS_USER);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/*
-+	 * Testing connections (FORK+DROP) again:
-+	 * After setting the policy re-check connections
-+	 * we expect the children to fail with -EPERM
-+	 */
-+	ret = kdbus_fork_test(bus, POLICY_NAME, conn_db, -EPERM);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/*
-+	 * Now expect that both parent and child to fail.
-+	 *
-+	 * Child should fail with -EPERM since we just restricted
-+	 * the POLICY_NAME TALK to uid 0 and its uid is 65534.
-+	 *
-+	 * Since the parent's connection will timeout when receiving
-+	 * from the child, we never continue. FWIW just put -EPERM.
-+	 */
-+	ret = kdbus_fork_test_by_id(bus, conn_db, -EPERM, -EPERM);
-+	ASSERT_EXIT(ret == 0);
-+
-+	/* Check if the name can be reached in a new userns */
-+	ret = kdbus_clone_userns_test(bus, POLICY_NAME, conn_db, -EPERM);
-+	ASSERT_RETURN(ret == 0);
-+
-+	for (i = 0; i < MAX_CONN; i++)
-+		kdbus_conn_free(conn_db[i]);
-+
-+	kdbus_conn_free(activator);
-+	kdbus_conn_free(policy_holder);
-+
-+	free(conn_db);
-+
-+	return ret;
-+}
-diff --git a/tools/testing/selftests/kdbus/test-policy-priv.c b/tools/testing/selftests/kdbus/test-policy-priv.c
-new file mode 100644
-index 0000000..0208638
---- /dev/null
-+++ b/tools/testing/selftests/kdbus/test-policy-priv.c
-@@ -0,0 +1,1285 @@
-+#include <errno.h>
-+#include <stdio.h>
-+#include <string.h>
-+#include <fcntl.h>
-+#include <stdlib.h>
-+#include <stdint.h>
-+#include <stdbool.h>
-+#include <unistd.h>
-+#include <time.h>
-+#include <sys/capability.h>
-+#include <sys/eventfd.h>
-+#include <sys/wait.h>
-+
-+#include "kdbus-test.h"
-+#include "kdbus-util.h"
-+#include "kdbus-enum.h"
-+
-+static int test_policy_priv_by_id(const char *bus,
-+				  struct kdbus_conn *conn_dst,
-+				  bool drop_second_user,
-+				  int parent_status,
-+				  int child_status)
-+{
-+	int ret = 0;
-+	uint64_t expected_cookie = time(NULL) ^ 0xdeadbeef;
-+
-+	ASSERT_RETURN(conn_dst);
-+
-+	ret = RUN_UNPRIVILEGED_CONN(unpriv, bus, ({
-+		ret = kdbus_msg_send(unpriv, NULL,
-+				     expected_cookie, 0, 0, 0,
-+				     conn_dst->id);
-+		ASSERT_EXIT(ret == child_status);
-+	}));
-+	ASSERT_RETURN(ret >= 0);
-+
-+	ret = kdbus_msg_recv_poll(conn_dst, 300, NULL, NULL);
-+	ASSERT_RETURN(ret == parent_status);
-+
-+	return 0;
-+}
-+
-+static int test_policy_priv_by_broadcast(const char *bus,
-+					 struct kdbus_conn *conn_dst,
-+					 int drop_second_user,
-+					 int parent_status,
-+					 int child_status)
-+{
-+	int efd;
-+	int ret = 0;
-+	eventfd_t event_status = 0;
-+	struct kdbus_msg *msg = NULL;
-+	uid_t second_uid = UNPRIV_UID;
-+	gid_t second_gid = UNPRIV_GID;
-+	struct kdbus_conn *child_2 = conn_dst;
-+	uint64_t expected_cookie = time(NULL) ^ 0xdeadbeef;
-+
-+	/* Drop to another unprivileged user other than UNPRIV_UID */
-+	if (drop_second_user == DROP_OTHER_UNPRIV) {
-+		second_uid = UNPRIV_UID - 1;
-+		second_gid = UNPRIV_GID - 1;
-+	}
-+
-+	/* child will signal parent to send broadcast */
-+	efd = eventfd(0, EFD_CLOEXEC);
-+	ASSERT_RETURN_VAL(efd >= 0, efd);
-+
-+	ret = RUN_UNPRIVILEGED(UNPRIV_UID, UNPRIV_GID, ({
-+		struct kdbus_conn *child;
-+
-+		child = kdbus_hello(bus, 0, NULL, 0);
-+		ASSERT_EXIT(child);
-+
-+		ret = kdbus_add_match_empty(child);
-+		ASSERT_EXIT(ret == 0);
-+
-+		/* signal parent */
-+		ret = eventfd_write(efd, 1);
-+		ASSERT_EXIT(ret == 0);
-+
-+		/* Use a little bit high time */
-+		ret = kdbus_msg_recv_poll(child, 500, &msg, NULL);
-+		ASSERT_EXIT(ret == child_status);
-+
-+		/*
-+		 * If we expect the child to get the broadcast
-+		 * message, then check the received cookie.
-+		 */
-+		if (ret == 0) {
-+			ASSERT_EXIT(expected_cookie == msg->cookie);
-+		}
-+
-+		/* Use expected_cookie since 'msg' might be NULL */
-+		ret = kdbus_msg_send(child, NULL, expected_cookie + 1,
-+				     0, 0, 0, KDBUS_DST_ID_BROADCAST);
-+		ASSERT_EXIT(ret == 0);
-+
-+		kdbus_msg_free(msg);
-+		kdbus_conn_free(child);
-+	}),
-+	({
-+		if (drop_second_user == DO_NOT_DROP) {
-+			ASSERT_RETURN(child_2);
-+
-+			ret = eventfd_read(efd, &event_status);
-+			ASSERT_RETURN(ret >= 0 && event_status == 1);
-+
-+			ret = kdbus_msg_send(child_2, NULL,
-+					     expected_cookie, 0, 0, 0,
-+					     KDBUS_DST_ID_BROADCAST);
-+			ASSERT_RETURN(ret == 0);
-+
-+			/* drop own broadcast */
-+			ret = kdbus_msg_recv(child_2, &msg, NULL);
-+			ASSERT_RETURN(ret == 0);
-+			ASSERT_RETURN(msg->src_id == child_2->id);
-+			kdbus_msg_free(msg);
-+
-+			/* Use a little bit high time */
-+			ret = kdbus_msg_recv_poll(child_2, 1000,
-+						  &msg, NULL);
-+			ASSERT_RETURN(ret == parent_status);
-+
-+			/*
-+			 * Check returned cookie in case we expect
-+			 * success.
-+			 */
-+			if (ret == 0) {
-+				ASSERT_RETURN(msg->cookie ==
-+					      expected_cookie + 1);
-+			}
-+
-+			kdbus_msg_free(msg);
-+		} else {
-+			/*
-+			 * Two unprivileged users will try to
-+			 * communicate using broadcast.
-+			 */
-+			ret = RUN_UNPRIVILEGED(second_uid, second_gid, ({
-+				child_2 = kdbus_hello(bus, 0, NULL, 0);
-+				ASSERT_EXIT(child_2);
-+
-+				ret = kdbus_add_match_empty(child_2);
-+				ASSERT_EXIT(ret == 0);
-+
-+				ret = eventfd_read(efd, &event_status);
-+				ASSERT_EXIT(ret >= 0 && event_status == 1);
-+
-+				ret = kdbus_msg_send(child_2, NULL,
-+						expected_cookie, 0, 0, 0,
-+						KDBUS_DST_ID_BROADCAST);
-+				ASSERT_EXIT(ret == 0);
-+
-+				/* drop own broadcast */
-+				ret = kdbus_msg_recv(child_2, &msg, NULL);
-+				ASSERT_RETURN(ret == 0);
-+				ASSERT_RETURN(msg->src_id == child_2->id);
-+				kdbus_msg_free(msg);
-+
-+				/* Use a little bit high time */
-+				ret = kdbus_msg_recv_poll(child_2, 1000,
-+							  &msg, NULL);
-+				ASSERT_EXIT(ret == parent_status);
-+
-+				/*
-+				 * Check returned cookie in case we expect
-+				 * success.
-+				 */
-+				if (ret == 0) {
-+					ASSERT_EXIT(msg->cookie ==
-+						    expected_cookie + 1);
-+				}
-+
-+				kdbus_msg_free(msg);
-+				kdbus_conn_free(child_2);
-+			}),
-+			({ 0; }));
-+			ASSERT_RETURN(ret == 0);
-+		}
-+	}));
-+	ASSERT_RETURN(ret == 0);
-+
-+	close(efd);
-+
-+	return ret;
-+}
-+
-+static void nosig(int sig)
-+{
-+}
-+
-+static int test_priv_before_policy_upload(struct kdbus_test_env *env)
-+{
-+	int ret = 0;
-+	struct kdbus_conn *conn;
-+
-+	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn);
-+
-+	/*
-+	 * Make sure unprivileged bus user cannot acquire names
-+	 * before registring any policy holder.
-+	 */
-+
-+	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-+		ret = kdbus_name_acquire(unpriv, "com.example.a", NULL);
-+		ASSERT_EXIT(ret < 0);
-+	}));
-+	ASSERT_RETURN(ret == 0);
-+
-+	/*
-+	 * Make sure unprivileged bus users cannot talk by default
-+	 * to privileged ones, unless a policy holder that allows
-+	 * this was uploaded.
-+	 */
-+
-+	ret = test_policy_priv_by_id(env->buspath, conn, false,
-+				     -ETIMEDOUT, -EPERM);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* Activate matching for a privileged connection */
-+	ret = kdbus_add_match_empty(conn);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/*
-+	 * First make sure that BROADCAST with msg flag
-+	 * KDBUS_MSG_EXPECT_REPLY will fail with -ENOTUNIQ
-+	 */
-+	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-+		ret = kdbus_msg_send(unpriv, NULL, 0xdeadbeef,
-+				     KDBUS_MSG_EXPECT_REPLY,
-+				     5000000000ULL, 0,
-+				     KDBUS_DST_ID_BROADCAST);
-+		ASSERT_EXIT(ret == -ENOTUNIQ);
-+	}));
-+	ASSERT_RETURN(ret == 0);
-+
-+	/*
-+	 * Test broadcast with a privileged connection.
-+	 *
-+	 * The first unprivileged receiver should not get the
-+	 * broadcast message sent by the privileged connection,
-+	 * since there is no a TALK policy that allows the
-+	 * unprivileged to TALK to the privileged connection. It
-+	 * will fail with -ETIMEDOUT
-+	 *
-+	 * Then second case:
-+	 * The privileged connection should get the broadcast
-+	 * message from the unprivileged one. Since the receiver is
-+	 * a privileged bus user and it has default TALK access to
-+	 * all connections it will receive those.
-+	 */
-+
-+	ret = test_policy_priv_by_broadcast(env->buspath, conn,
-+					    DO_NOT_DROP,
-+					    0, -ETIMEDOUT);
-+	ASSERT_RETURN(ret == 0);
-+
-+
-+	/*
-+	 * Test broadcast with two unprivileged connections running
-+	 * under the same user.
-+	 *
-+	 * Both connections should succeed.
-+	 */
-+
-+	ret = test_policy_priv_by_broadcast(env->buspath, NULL,
-+					    DROP_SAME_UNPRIV, 0, 0);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/*
-+	 * Test broadcast with two unprivileged connections running
-+	 * under different users.
-+	 *
-+	 * Both connections will fail with -ETIMEDOUT.
-+	 */
-+
-+	ret = test_policy_priv_by_broadcast(env->buspath, NULL,
-+					    DROP_OTHER_UNPRIV,
-+					    -ETIMEDOUT, -ETIMEDOUT);
-+	ASSERT_RETURN(ret == 0);
-+
-+	kdbus_conn_free(conn);
-+
-+	return ret;
-+}
-+
-+static int test_broadcast_after_policy_upload(struct kdbus_test_env *env)
-+{
-+	int ret;
-+	int efd;
-+	eventfd_t event_status = 0;
-+	struct kdbus_msg *msg = NULL;
-+	struct kdbus_conn *owner_a, *owner_b;
-+	struct kdbus_conn *holder_a, *holder_b;
-+	struct kdbus_policy_access access = {};
-+	uint64_t expected_cookie = time(NULL) ^ 0xdeadbeef;
-+
-+	owner_a = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(owner_a);
-+
-+	ret = kdbus_name_acquire(owner_a, "com.example.broadcastA", NULL);
-+	ASSERT_EXIT(ret >= 0);
-+
-+	/*
-+	 * Make sure unprivileged bus users cannot talk by default
-+	 * to privileged ones, unless a policy holder that allows
-+	 * this was uploaded.
-+	 */
-+
-+	++expected_cookie;
-+	ret = test_policy_priv_by_id(env->buspath, owner_a, false,
-+				     -ETIMEDOUT, -EPERM);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/*
-+	 * Make sure that privileged won't receive broadcasts unless
-+	 * it installs a match. It will fail with -ETIMEDOUT
-+	 *
-+	 * At same time check that the unprivileged connection will
-+	 * not receive the broadcast message from the privileged one
-+	 * since the privileged one owns a name with a restricted
-+	 * policy TALK (actually the TALK policy is still not
-+	 * registered so we fail by default), thus the unprivileged
-+	 * receiver is not able to TALK to that name.
-+	 */
-+
-+	/* Activate matching for a privileged connection */
-+	ret = kdbus_add_match_empty(owner_a);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/*
-+	 * Redo the previous test. The privileged conn owner_a is
-+	 * able to TALK to any connection so it will receive the
-+	 * broadcast message now.
-+	 */
-+
-+	ret = test_policy_priv_by_broadcast(env->buspath, owner_a,
-+					    DO_NOT_DROP,
-+					    0, -ETIMEDOUT);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/*
-+	 * Test that broadcast between two unprivileged users running
-+	 * under the same user still succeed.
-+	 */
-+
-+	ret = test_policy_priv_by_broadcast(env->buspath, NULL,
-+					    DROP_SAME_UNPRIV, 0, 0);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/*
-+	 * Test broadcast with two unprivileged connections running
-+	 * under different users.
-+	 *
-+	 * Both connections will fail with -ETIMEDOUT.
-+	 */
-+
-+	ret = test_policy_priv_by_broadcast(env->buspath, NULL,
-+					    DROP_OTHER_UNPRIV,
-+					    -ETIMEDOUT, -ETIMEDOUT);
-+	ASSERT_RETURN(ret == 0);
-+
-+	access = (struct kdbus_policy_access){
-+		.type = KDBUS_POLICY_ACCESS_USER,
-+		.id = geteuid(),
-+		.access = KDBUS_POLICY_OWN,
-+	};
-+
-+	holder_a = kdbus_hello_registrar(env->buspath,
-+					 "com.example.broadcastA",
-+					 &access, 1,
-+					 KDBUS_HELLO_POLICY_HOLDER);
-+	ASSERT_RETURN(holder_a);
-+
-+	holder_b = kdbus_hello_registrar(env->buspath,
-+					 "com.example.broadcastB",
-+					 &access, 1,
-+					 KDBUS_HELLO_POLICY_HOLDER);
-+	ASSERT_RETURN(holder_b);
-+
-+	/* Free connections and their received messages and restart */
-+	kdbus_conn_free(owner_a);
-+
-+	owner_a = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(owner_a);
-+
-+	/* Activate matching for a privileged connection */
-+	ret = kdbus_add_match_empty(owner_a);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_name_acquire(owner_a, "com.example.broadcastA", NULL);
-+	ASSERT_EXIT(ret >= 0);
-+
-+	owner_b = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(owner_b);
-+
-+	ret = kdbus_name_acquire(owner_b, "com.example.broadcastB", NULL);
-+	ASSERT_EXIT(ret >= 0);
-+
-+	/* Activate matching for a privileged connection */
-+	ret = kdbus_add_match_empty(owner_b);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/*
-+	 * Test that even if "com.example.broadcastA" and
-+	 * "com.example.broadcastB" do have a TALK access by default
-+	 * they are able to signal each other using broadcast due to
-+	 * the fact they are privileged connections, they receive
-+	 * all broadcasts if the match allows it.
-+	 */
-+
-+	++expected_cookie;
-+	ret = kdbus_msg_send(owner_a, NULL, expected_cookie, 0,
-+			     0, 0, KDBUS_DST_ID_BROADCAST);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_msg_recv_poll(owner_a, 100, &msg, NULL);
-+	ASSERT_RETURN(ret == 0);
-+	ASSERT_RETURN(msg->cookie == expected_cookie);
-+
-+	/* Check src ID */
-+	ASSERT_RETURN(msg->src_id == owner_a->id);
-+
-+	kdbus_msg_free(msg);
-+
-+	ret = kdbus_msg_recv_poll(owner_b, 100, &msg, NULL);
-+	ASSERT_RETURN(ret == 0);
-+	ASSERT_RETURN(msg->cookie == expected_cookie);
-+
-+	/* Check src ID */
-+	ASSERT_RETURN(msg->src_id == owner_a->id);
-+
-+	kdbus_msg_free(msg);
-+
-+	/* Release name "com.example.broadcastB" */
-+
-+	ret = kdbus_name_release(owner_b, "com.example.broadcastB");
-+	ASSERT_EXIT(ret >= 0);
-+
-+	/* KDBUS_POLICY_OWN for unprivileged connections */
-+	access = (struct kdbus_policy_access){
-+		.type = KDBUS_POLICY_ACCESS_WORLD,
-+		.id = geteuid(),
-+		.access = KDBUS_POLICY_OWN,
-+	};
-+
-+	/* Update the policy so unprivileged will own the name */
-+
-+	ret = kdbus_conn_update_policy(holder_b,
-+				       "com.example.broadcastB",
-+				       &access, 1);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/*
-+	 * Send broadcasts from an unprivileged connection that
-+	 * owns a name "com.example.broadcastB".
-+	 *
-+	 * We'll have four destinations here:
-+	 *
-+	 * 1) destination owner_a: privileged connection that owns
-+	 * "com.example.broadcastA". It will receive the broadcast
-+	 * since it is a privileged has default TALK access to all
-+	 * connections, and it is subscribed to the match.
-+	 * Will succeed.
-+	 *
-+	 * owner_b: privileged connection (running under a different
-+	 * uid) that do not own names, but with an empty broadcast
-+	 * match, so it will receive broadcasts since it has default
-+	 * TALK access to all connection.
-+	 *
-+	 * unpriv_a: unpriv connection that do not own any name.
-+	 * It will receive the broadcast since it is running under
-+	 * the same user of the one broadcasting and did install
-+	 * matches. It should get the message.
-+	 *
-+	 * unpriv_b: unpriv connection is not interested in broadcast
-+	 * messages, so it did not install broadcast matches. Should
-+	 * fail with -ETIMEDOUT
-+	 */
-+
-+	++expected_cookie;
-+	efd = eventfd(0, EFD_CLOEXEC);
-+	ASSERT_RETURN_VAL(efd >= 0, efd);
-+
-+	ret = RUN_UNPRIVILEGED(UNPRIV_UID, UNPRIV_UID, ({
-+		struct kdbus_conn *unpriv_owner;
-+		struct kdbus_conn *unpriv_a, *unpriv_b;
-+
-+		unpriv_owner = kdbus_hello(env->buspath, 0, NULL, 0);
-+		ASSERT_EXIT(unpriv_owner);
-+
-+		unpriv_a = kdbus_hello(env->buspath, 0, NULL, 0);
-+		ASSERT_EXIT(unpriv_a);
-+
-+		unpriv_b = kdbus_hello(env->buspath, 0, NULL, 0);
-+		ASSERT_EXIT(unpriv_b);
-+
-+		ret = kdbus_name_acquire(unpriv_owner,
-+					 "com.example.broadcastB",
-+					 NULL);
-+		ASSERT_EXIT(ret >= 0);
-+
-+		ret = kdbus_add_match_empty(unpriv_a);
-+		ASSERT_EXIT(ret == 0);
-+
-+		/* Signal that we are doing broadcasts */
-+		ret = eventfd_write(efd, 1);
-+		ASSERT_EXIT(ret == 0);
-+
-+		/*
-+		 * Do broadcast from a connection that owns the
-+		 * names "com.example.broadcastB".
-+		 */
-+		ret = kdbus_msg_send(unpriv_owner, NULL,
-+				     expected_cookie,
-+				     0, 0, 0,
-+				     KDBUS_DST_ID_BROADCAST);
-+		ASSERT_EXIT(ret == 0);
-+
-+		/*
-+		 * Unprivileged connection running under the same
-+		 * user. It should succeed.
-+		 */
-+		ret = kdbus_msg_recv_poll(unpriv_a, 300, &msg, NULL);
-+		ASSERT_EXIT(ret == 0 && msg->cookie == expected_cookie);
-+
-+		/*
-+		 * Did not install matches, not interested in
-+		 * broadcasts
-+		 */
-+		ret = kdbus_msg_recv_poll(unpriv_b, 300, NULL, NULL);
-+		ASSERT_EXIT(ret == -ETIMEDOUT);
-+	}),
-+	({
-+		ret = eventfd_read(efd, &event_status);
-+		ASSERT_RETURN(ret >= 0 && event_status == 1);
-+
-+		/*
-+		 * owner_a must fail with -ETIMEDOUT, since it owns
-+		 * name "com.example.broadcastA" and its TALK
-+		 * access is restriced.
-+		 */
-+		ret = kdbus_msg_recv_poll(owner_a, 300, &msg, NULL);
-+		ASSERT_RETURN(ret == 0);
-+
-+		/* confirm the received cookie */
-+		ASSERT_RETURN(msg->cookie == expected_cookie);
-+
-+		kdbus_msg_free(msg);
-+
-+		/*
-+		 * owner_b got the broadcast from an unprivileged
-+		 * connection.
-+		 */
-+		ret = kdbus_msg_recv_poll(owner_b, 300, &msg, NULL);
-+		ASSERT_RETURN(ret == 0);
-+
-+		/* confirm the received cookie */
-+		ASSERT_RETURN(msg->cookie == expected_cookie);
-+
-+		kdbus_msg_free(msg);
-+
-+	}));
-+	ASSERT_RETURN(ret == 0);
-+
-+	close(efd);
-+
-+	/*
-+	 * Test broadcast with two unprivileged connections running
-+	 * under different users.
-+	 *
-+	 * Both connections will fail with -ETIMEDOUT.
-+	 */
-+
-+	ret = test_policy_priv_by_broadcast(env->buspath, NULL,
-+					    DROP_OTHER_UNPRIV,
-+					    -ETIMEDOUT, -ETIMEDOUT);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* Drop received broadcasts by privileged */
-+	ret = kdbus_msg_recv_poll(owner_a, 100, NULL, NULL);
-+	ret = kdbus_msg_recv_poll(owner_a, 100, NULL, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_msg_recv(owner_a, NULL, NULL);
-+	ASSERT_RETURN(ret == -EAGAIN);
-+
-+	ret = kdbus_msg_recv_poll(owner_b, 100, NULL, NULL);
-+	ret = kdbus_msg_recv_poll(owner_b, 100, NULL, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_msg_recv(owner_b, NULL, NULL);
-+	ASSERT_RETURN(ret == -EAGAIN);
-+
-+	/*
-+	 * Perform last tests, allow others to talk to name
-+	 * "com.example.broadcastA". So now receiving broadcasts
-+	 * from it should succeed since the TALK policy allow it.
-+	 */
-+
-+	/* KDBUS_POLICY_OWN for unprivileged connections */
-+	access = (struct kdbus_policy_access){
-+		.type = KDBUS_POLICY_ACCESS_WORLD,
-+		.id = geteuid(),
-+		.access = KDBUS_POLICY_TALK,
-+	};
-+
-+	ret = kdbus_conn_update_policy(holder_a,
-+				       "com.example.broadcastA",
-+				       &access, 1);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/*
-+	 * Unprivileged is able to TALK to "com.example.broadcastA"
-+	 * now so it will receive its broadcasts
-+	 */
-+	ret = test_policy_priv_by_broadcast(env->buspath, owner_a,
-+					    DO_NOT_DROP, 0, 0);
-+	ASSERT_RETURN(ret == 0);
-+
-+	++expected_cookie;
-+	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-+		ret = kdbus_name_acquire(unpriv, "com.example.broadcastB",
-+					 NULL);
-+		ASSERT_EXIT(ret >= 0);
-+		ret = kdbus_msg_send(unpriv, NULL, expected_cookie,
-+				     0, 0, 0, KDBUS_DST_ID_BROADCAST);
-+		ASSERT_EXIT(ret == 0);
-+	}));
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* owner_a is privileged it will get the broadcast now. */
-+	ret = kdbus_msg_recv_poll(owner_a, 300, &msg, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* confirm the received cookie */
-+	ASSERT_RETURN(msg->cookie == expected_cookie);
-+
-+	kdbus_msg_free(msg);
-+
-+	/*
-+	 * owner_a released name "com.example.broadcastA". It should
-+	 * receive broadcasts since it is still privileged and has
-+	 * the right match.
-+	 *
-+	 * Unprivileged connection will own a name and will try to
-+	 * signal to the privileged connection.
-+	 */
-+
-+	ret = kdbus_name_release(owner_a, "com.example.broadcastA");
-+	ASSERT_EXIT(ret >= 0);
-+
-+	++expected_cookie;
-+	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-+		ret = kdbus_name_acquire(unpriv, "com.example.broadcastB",
-+					 NULL);
-+		ASSERT_EXIT(ret >= 0);
-+		ret = kdbus_msg_send(unpriv, NULL, expected_cookie,
-+				     0, 0, 0, KDBUS_DST_ID_BROADCAST);
-+		ASSERT_EXIT(ret == 0);
-+	}));
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* owner_a will get the broadcast now. */
-+	ret = kdbus_msg_recv_poll(owner_a, 300, &msg, NULL);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/* confirm the received cookie */
-+	ASSERT_RETURN(msg->cookie == expected_cookie);
-+
-+	kdbus_msg_free(msg);
-+
-+	kdbus_conn_free(owner_a);
-+	kdbus_conn_free(owner_b);
-+	kdbus_conn_free(holder_a);
-+	kdbus_conn_free(holder_b);
-+
-+	return 0;
-+}
-+
-+static int test_policy_priv(struct kdbus_test_env *env)
-+{
-+	struct kdbus_conn *conn_a, *conn_b, *conn, *owner;
-+	struct kdbus_policy_access access, *acc;
-+	sigset_t sset;
-+	size_t num;
-+	int ret;
-+
-+	/*
-+	 * Make sure we have CAP_SETUID/SETGID so we can drop privileges
-+	 */
-+
-+	ret = test_is_capable(CAP_SETUID, CAP_SETGID, -1);
-+	ASSERT_RETURN(ret >= 0);
-+
-+	if (!ret)
-+		return TEST_SKIP;
-+
-+	/* make sure that uids and gids are mapped */
-+	if (!all_uids_gids_are_mapped())
-+		return TEST_SKIP;
-+
-+	/*
-+	 * Setup:
-+	 *  conn_a: policy holder for com.example.a
-+	 *  conn_b: name holder of com.example.b
-+	 */
-+
-+	signal(SIGUSR1, nosig);
-+	sigemptyset(&sset);
-+	sigaddset(&sset, SIGUSR1);
-+	sigprocmask(SIG_BLOCK, &sset, NULL);
-+
-+	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn);
-+
-+	/*
-+	 * Before registering any policy holder, make sure that the
-+	 * bus is secure by default. This test is necessary, it catches
-+	 * several cases where old D-Bus was vulnerable.
-+	 */
-+
-+	ret = test_priv_before_policy_upload(env);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/*
-+	 * Make sure unprivileged are not able to register policy
-+	 * holders
-+	 */
-+
-+	ret = RUN_UNPRIVILEGED(UNPRIV_UID, UNPRIV_GID, ({
-+		struct kdbus_conn *holder;
-+
-+		holder = kdbus_hello_registrar(env->buspath,
-+					       "com.example.a", NULL, 0,
-+					       KDBUS_HELLO_POLICY_HOLDER);
-+		ASSERT_EXIT(holder == NULL && errno == EPERM);
-+	}),
-+	({ 0; }));
-+	ASSERT_RETURN(ret == 0);
-+
-+
-+	/* Register policy holder */
-+
-+	conn_a = kdbus_hello_registrar(env->buspath, "com.example.a",
-+				       NULL, 0, KDBUS_HELLO_POLICY_HOLDER);
-+	ASSERT_RETURN(conn_a);
-+
-+	conn_b = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn_b);
-+
-+	ret = kdbus_name_acquire(conn_b, "com.example.b", NULL);
-+	ASSERT_EXIT(ret >= 0);
-+
-+	/*
-+	 * Make sure bus-owners can always acquire names.
-+	 */
-+	ret = kdbus_name_acquire(conn, "com.example.a", NULL);
-+	ASSERT_EXIT(ret >= 0);
-+
-+	kdbus_conn_free(conn);
-+
-+	/*
-+	 * Make sure unprivileged users cannot acquire names with default
-+	 * policy assigned.
-+	 */
-+
-+	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-+		ret = kdbus_name_acquire(unpriv, "com.example.a", NULL);
-+		ASSERT_EXIT(ret < 0);
-+	}));
-+	ASSERT_RETURN(ret >= 0);
-+
-+	/*
-+	 * Make sure unprivileged users can acquire names if we make them
-+	 * world-accessible.
-+	 */
-+
-+	access = (struct kdbus_policy_access){
-+		.type = KDBUS_POLICY_ACCESS_WORLD,
-+		.id = 0,
-+		.access = KDBUS_POLICY_OWN,
-+	};
-+
-+	/*
-+	 * Make sure unprivileged/normal connections are not able
-+	 * to update policies
-+	 */
-+
-+	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-+		ret = kdbus_conn_update_policy(unpriv, "com.example.a",
-+					       &access, 1);
-+		ASSERT_EXIT(ret == -EOPNOTSUPP);
-+	}));
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_conn_update_policy(conn_a, "com.example.a", &access, 1);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-+		ret = kdbus_name_acquire(unpriv, "com.example.a", NULL);
-+		ASSERT_EXIT(ret >= 0);
-+	}));
-+	ASSERT_RETURN(ret >= 0);
-+
-+	/*
-+	 * Make sure unprivileged users can acquire names if we make them
-+	 * gid-accessible. But only if the gid matches.
-+	 */
-+
-+	access = (struct kdbus_policy_access){
-+		.type = KDBUS_POLICY_ACCESS_GROUP,
-+		.id = UNPRIV_GID,
-+		.access = KDBUS_POLICY_OWN,
-+	};
-+
-+	ret = kdbus_conn_update_policy(conn_a, "com.example.a", &access, 1);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-+		ret = kdbus_name_acquire(unpriv, "com.example.a", NULL);
-+		ASSERT_EXIT(ret >= 0);
-+	}));
-+	ASSERT_RETURN(ret >= 0);
-+
-+	access = (struct kdbus_policy_access){
-+		.type = KDBUS_POLICY_ACCESS_GROUP,
-+		.id = 1,
-+		.access = KDBUS_POLICY_OWN,
-+	};
-+
-+	ret = kdbus_conn_update_policy(conn_a, "com.example.a", &access, 1);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-+		ret = kdbus_name_acquire(unpriv, "com.example.a", NULL);
-+		ASSERT_EXIT(ret < 0);
-+	}));
-+	ASSERT_RETURN(ret >= 0);
-+
-+	/*
-+	 * Make sure unprivileged users can acquire names if we make them
-+	 * uid-accessible. But only if the uid matches.
-+	 */
-+
-+	access = (struct kdbus_policy_access){
-+		.type = KDBUS_POLICY_ACCESS_USER,
-+		.id = UNPRIV_UID,
-+		.access = KDBUS_POLICY_OWN,
-+	};
-+
-+	ret = kdbus_conn_update_policy(conn_a, "com.example.a", &access, 1);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-+		ret = kdbus_name_acquire(unpriv, "com.example.a", NULL);
-+		ASSERT_EXIT(ret >= 0);
-+	}));
-+	ASSERT_RETURN(ret >= 0);
-+
-+	access = (struct kdbus_policy_access){
-+		.type = KDBUS_POLICY_ACCESS_USER,
-+		.id = 1,
-+		.access = KDBUS_POLICY_OWN,
-+	};
-+
-+	ret = kdbus_conn_update_policy(conn_a, "com.example.a", &access, 1);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-+		ret = kdbus_name_acquire(unpriv, "com.example.a", NULL);
-+		ASSERT_EXIT(ret < 0);
-+	}));
-+	ASSERT_RETURN(ret >= 0);
-+
-+	/*
-+	 * Make sure unprivileged users cannot acquire names if no owner-policy
-+	 * matches, even if SEE/TALK policies match.
-+	 */
-+
-+	num = 4;
-+	acc = (struct kdbus_policy_access[]){
-+		{
-+			.type = KDBUS_POLICY_ACCESS_GROUP,
-+			.id = UNPRIV_GID,
-+			.access = KDBUS_POLICY_SEE,
-+		},
-+		{
-+			.type = KDBUS_POLICY_ACCESS_USER,
-+			.id = UNPRIV_UID,
-+			.access = KDBUS_POLICY_TALK,
-+		},
-+		{
-+			.type = KDBUS_POLICY_ACCESS_WORLD,
-+			.id = 0,
-+			.access = KDBUS_POLICY_TALK,
-+		},
-+		{
-+			.type = KDBUS_POLICY_ACCESS_WORLD,
-+			.id = 0,
-+			.access = KDBUS_POLICY_SEE,
-+		},
-+	};
-+
-+	ret = kdbus_conn_update_policy(conn_a, "com.example.a", acc, num);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-+		ret = kdbus_name_acquire(unpriv, "com.example.a", NULL);
-+		ASSERT_EXIT(ret < 0);
-+	}));
-+	ASSERT_RETURN(ret >= 0);
-+
-+	/*
-+	 * Make sure unprivileged users can acquire names if the only matching
-+	 * policy is somewhere in the middle.
-+	 */
-+
-+	num = 5;
-+	acc = (struct kdbus_policy_access[]){
-+		{
-+			.type = KDBUS_POLICY_ACCESS_USER,
-+			.id = 1,
-+			.access = KDBUS_POLICY_OWN,
-+		},
-+		{
-+			.type = KDBUS_POLICY_ACCESS_USER,
-+			.id = 2,
-+			.access = KDBUS_POLICY_OWN,
-+		},
-+		{
-+			.type = KDBUS_POLICY_ACCESS_USER,
-+			.id = UNPRIV_UID,
-+			.access = KDBUS_POLICY_OWN,
-+		},
-+		{
-+			.type = KDBUS_POLICY_ACCESS_USER,
-+			.id = 3,
-+			.access = KDBUS_POLICY_OWN,
-+		},
-+		{
-+			.type = KDBUS_POLICY_ACCESS_USER,
-+			.id = 4,
-+			.access = KDBUS_POLICY_OWN,
-+		},
-+	};
-+
-+	ret = kdbus_conn_update_policy(conn_a, "com.example.a", acc, num);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-+		ret = kdbus_name_acquire(unpriv, "com.example.a", NULL);
-+		ASSERT_EXIT(ret >= 0);
-+	}));
-+	ASSERT_RETURN(ret >= 0);
-+
-+	/*
-+	 * Clear policies
-+	 */
-+
-+	ret = kdbus_conn_update_policy(conn_a, "com.example.a", NULL, 0);
-+	ASSERT_RETURN(ret == 0);
-+
-+	/*
-+	 * Make sure privileged bus users can _always_ talk to others.
-+	 */
-+
-+	conn = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn);
-+
-+	ret = kdbus_msg_send(conn, "com.example.b", 0xdeadbeef, 0, 0, 0, 0);
-+	ASSERT_EXIT(ret >= 0);
-+
-+	ret = kdbus_msg_recv_poll(conn_b, 300, NULL, NULL);
-+	ASSERT_EXIT(ret >= 0);
-+
-+	kdbus_conn_free(conn);
-+
-+	/*
-+	 * Make sure unprivileged bus users cannot talk by default.
-+	 */
-+
-+	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-+		ret = kdbus_msg_send(unpriv, "com.example.b", 0xdeadbeef, 0, 0,
-+				     0, 0);
-+		ASSERT_EXIT(ret == -EPERM);
-+	}));
-+	ASSERT_RETURN(ret >= 0);
-+
-+	/*
-+	 * Make sure unprivileged bus users can talk to equals, even without
-+	 * policy.
-+	 */
-+
-+	access = (struct kdbus_policy_access){
-+		.type = KDBUS_POLICY_ACCESS_USER,
-+		.id = UNPRIV_UID,
-+		.access = KDBUS_POLICY_OWN,
-+	};
-+
-+	ret = kdbus_conn_update_policy(conn_a, "com.example.c", &access, 1);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-+		struct kdbus_conn *owner;
-+
-+		owner = kdbus_hello(env->buspath, 0, NULL, 0);
-+		ASSERT_RETURN(owner);
-+
-+		ret = kdbus_name_acquire(owner, "com.example.c", NULL);
-+		ASSERT_EXIT(ret >= 0);
-+
-+		ret = kdbus_msg_send(unpriv, "com.example.c", 0xdeadbeef, 0, 0,
-+				     0, 0);
-+		ASSERT_EXIT(ret >= 0);
-+		ret = kdbus_msg_recv_poll(owner, 100, NULL, NULL);
-+		ASSERT_EXIT(ret >= 0);
-+
-+		kdbus_conn_free(owner);
-+	}));
-+	ASSERT_RETURN(ret >= 0);
-+
-+	/*
-+	 * Make sure unprivileged bus users can talk to privileged users if a
-+	 * suitable UID policy is set.
-+	 */
-+
-+	access = (struct kdbus_policy_access){
-+		.type = KDBUS_POLICY_ACCESS_USER,
-+		.id = UNPRIV_UID,
-+		.access = KDBUS_POLICY_TALK,
-+	};
-+
-+	ret = kdbus_conn_update_policy(conn_a, "com.example.b", &access, 1);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-+		ret = kdbus_msg_send(unpriv, "com.example.b", 0xdeadbeef, 0, 0,
-+				     0, 0);
-+		ASSERT_EXIT(ret >= 0);
-+	}));
-+	ASSERT_RETURN(ret >= 0);
-+
-+	ret = kdbus_msg_recv_poll(conn_b, 100, NULL, NULL);
-+	ASSERT_EXIT(ret >= 0);
-+
-+	/*
-+	 * Make sure unprivileged bus users can talk to privileged users if a
-+	 * suitable GID policy is set.
-+	 */
-+
-+	access = (struct kdbus_policy_access){
-+		.type = KDBUS_POLICY_ACCESS_GROUP,
-+		.id = UNPRIV_GID,
-+		.access = KDBUS_POLICY_TALK,
-+	};
-+
-+	ret = kdbus_conn_update_policy(conn_a, "com.example.b", &access, 1);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-+		ret = kdbus_msg_send(unpriv, "com.example.b", 0xdeadbeef, 0, 0,
-+				     0, 0);
-+		ASSERT_EXIT(ret >= 0);
-+	}));
-+	ASSERT_RETURN(ret >= 0);
-+
-+	ret = kdbus_msg_recv_poll(conn_b, 100, NULL, NULL);
-+	ASSERT_EXIT(ret >= 0);
-+
-+	/*
-+	 * Make sure unprivileged bus users can talk to privileged users if a
-+	 * suitable WORLD policy is set.
-+	 */
-+
-+	access = (struct kdbus_policy_access){
-+		.type = KDBUS_POLICY_ACCESS_WORLD,
-+		.id = 0,
-+		.access = KDBUS_POLICY_TALK,
-+	};
-+
-+	ret = kdbus_conn_update_policy(conn_a, "com.example.b", &access, 1);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-+		ret = kdbus_msg_send(unpriv, "com.example.b", 0xdeadbeef, 0, 0,
-+				     0, 0);
-+		ASSERT_EXIT(ret >= 0);
-+	}));
-+	ASSERT_RETURN(ret >= 0);
-+
-+	ret = kdbus_msg_recv_poll(conn_b, 100, NULL, NULL);
-+	ASSERT_EXIT(ret >= 0);
-+
-+	/*
-+	 * Make sure unprivileged bus users cannot talk to privileged users if
-+	 * no suitable policy is set.
-+	 */
-+
-+	num = 5;
-+	acc = (struct kdbus_policy_access[]){
-+		{
-+			.type = KDBUS_POLICY_ACCESS_USER,
-+			.id = 0,
-+			.access = KDBUS_POLICY_OWN,
-+		},
-+		{
-+			.type = KDBUS_POLICY_ACCESS_USER,
-+			.id = 1,
-+			.access = KDBUS_POLICY_TALK,
-+		},
-+		{
-+			.type = KDBUS_POLICY_ACCESS_USER,
-+			.id = UNPRIV_UID,
-+			.access = KDBUS_POLICY_SEE,
-+		},
-+		{
-+			.type = KDBUS_POLICY_ACCESS_USER,
-+			.id = 3,
-+			.access = KDBUS_POLICY_TALK,
-+		},
-+		{
-+			.type = KDBUS_POLICY_ACCESS_USER,
-+			.id = 4,
-+			.access = KDBUS_POLICY_TALK,
-+		},
-+	};
-+
-+	ret = kdbus_conn_update_policy(conn_a, "com.example.b", acc, num);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-+		ret = kdbus_msg_send(unpriv, "com.example.b", 0xdeadbeef, 0, 0,
-+				     0, 0);
-+		ASSERT_EXIT(ret == -EPERM);
-+	}));
-+	ASSERT_RETURN(ret >= 0);
-+
-+	/*
-+	 * Make sure unprivileged bus users can talk to privileged users if a
-+	 * suitable OWN privilege overwrites TALK.
-+	 */
-+
-+	access = (struct kdbus_policy_access){
-+		.type = KDBUS_POLICY_ACCESS_WORLD,
-+		.id = 0,
-+		.access = KDBUS_POLICY_OWN,
-+	};
-+
-+	ret = kdbus_conn_update_policy(conn_a, "com.example.b", &access, 1);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-+		ret = kdbus_msg_send(unpriv, "com.example.b", 0xdeadbeef, 0, 0,
-+				     0, 0);
-+		ASSERT_EXIT(ret >= 0);
-+	}));
-+	ASSERT_RETURN(ret >= 0);
-+
-+	ret = kdbus_msg_recv_poll(conn_b, 100, NULL, NULL);
-+	ASSERT_EXIT(ret >= 0);
-+
-+	/*
-+	 * Make sure the TALK cache is reset correctly when policies are
-+	 * updated.
-+	 */
-+
-+	access = (struct kdbus_policy_access){
-+		.type = KDBUS_POLICY_ACCESS_WORLD,
-+		.id = 0,
-+		.access = KDBUS_POLICY_TALK,
-+	};
-+
-+	ret = kdbus_conn_update_policy(conn_a, "com.example.b", &access, 1);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = RUN_UNPRIVILEGED_CONN(unpriv, env->buspath, ({
-+		ret = kdbus_msg_send(unpriv, "com.example.b", 0xdeadbeef, 0, 0,
-+				     0, 0);
-+		ASSERT_EXIT(ret >= 0);
-+
-+		ret = kdbus_msg_recv_poll(conn_b, 100, NULL, NULL);
-+		ASSERT_EXIT(ret >= 0);
-+
-+		ret = kdbus_conn_update_policy(conn_a, "com.example.b",
-+					       NULL, 0);
-+		ASSERT_RETURN(ret == 0);
-+
-+		ret = kdbus_msg_send(unpriv, "com.example.b", 0xdeadbeef, 0, 0,
-+				     0, 0);
-+		ASSERT_EXIT(ret == -EPERM);
-+	}));
-+	ASSERT_RETURN(ret >= 0);
-+
-+	/*
-+	 * Make sure the TALK cache is reset correctly when policy holders
-+	 * disconnect.
-+	 */
-+
-+	access = (struct kdbus_policy_access){
-+		.type = KDBUS_POLICY_ACCESS_WORLD,
-+		.id = 0,
-+		.access = KDBUS_POLICY_OWN,
-+	};
-+
-+	conn = kdbus_hello_registrar(env->buspath, "com.example.c",
-+				     NULL, 0, KDBUS_HELLO_POLICY_HOLDER);
-+	ASSERT_RETURN(conn);
-+
-+	ret = kdbus_conn_update_policy(conn, "com.example.c", &access, 1);
-+	ASSERT_RETURN(ret == 0);
-+
-+	owner = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(owner);
-+
-+	ret = kdbus_name_acquire(owner, "com.example.c", NULL);
-+	ASSERT_RETURN(ret >= 0);
-+
-+	ret = RUN_UNPRIVILEGED(UNPRIV_UID, UNPRIV_GID, ({
-+		struct kdbus_conn *unpriv;
-+
-+		/* wait for parent to be finished */
-+		sigemptyset(&sset);
-+		ret = sigsuspend(&sset);
-+		ASSERT_RETURN(ret == -1 && errno == EINTR);
-+
-+		unpriv = kdbus_hello(env->buspath, 0, NULL, 0);
-+		ASSERT_RETURN(unpriv);
-+
-+		ret = kdbus_msg_send(unpriv, "com.example.c", 0xdeadbeef, 0, 0,
-+				     0, 0);
-+		ASSERT_EXIT(ret >= 0);
-+
-+		ret = kdbus_msg_recv_poll(owner, 100, NULL, NULL);
-+		ASSERT_EXIT(ret >= 0);
-+
-+		/* free policy holder */
-+		kdbus_conn_free(conn);
-+
-+		ret = kdbus_msg_send(unpriv, "com.example.c", 0xdeadbeef, 0, 0,
-+				     0, 0);
-+		ASSERT_EXIT(ret == -EPERM);
-+
-+		kdbus_conn_free(unpriv);
-+	}), ({
-+		/* make sure policy holder is only valid in child */
-+		kdbus_conn_free(conn);
-+		kill(pid, SIGUSR1);
-+	}));
-+	ASSERT_RETURN(ret >= 0);
-+
-+
-+	/*
-+	 * The following tests are necessary.
-+	 */
-+
-+	ret = test_broadcast_after_policy_upload(env);
-+	ASSERT_RETURN(ret == 0);
-+
-+	kdbus_conn_free(owner);
-+
-+	/*
-+	 * cleanup resources
-+	 */
-+
-+	kdbus_conn_free(conn_b);
-+	kdbus_conn_free(conn_a);
-+
-+	return TEST_OK;
-+}
-+
-+int kdbus_test_policy_priv(struct kdbus_test_env *env)
-+{
-+	pid_t pid;
-+	int ret;
-+
-+	/* make sure to exit() if a child returns from fork() */
-+	pid = getpid();
-+	ret = test_policy_priv(env);
-+	if (pid != getpid())
-+		exit(1);
-+
-+	return ret;
-+}
-diff --git a/tools/testing/selftests/kdbus/test-policy.c b/tools/testing/selftests/kdbus/test-policy.c
-new file mode 100644
-index 0000000..96d20d5
---- /dev/null
-+++ b/tools/testing/selftests/kdbus/test-policy.c
-@@ -0,0 +1,80 @@
-+#include <errno.h>
-+#include <stdio.h>
-+#include <string.h>
-+#include <fcntl.h>
-+#include <stdlib.h>
-+#include <stdint.h>
-+#include <stdbool.h>
-+#include <unistd.h>
-+
-+#include "kdbus-test.h"
-+#include "kdbus-util.h"
-+#include "kdbus-enum.h"
-+
-+int kdbus_test_policy(struct kdbus_test_env *env)
-+{
-+	struct kdbus_conn *conn_a, *conn_b;
-+	struct kdbus_policy_access access;
-+	int ret;
-+
-+	/* Invalid name */
-+	conn_a = kdbus_hello_registrar(env->buspath, ".example.a",
-+				       NULL, 0, KDBUS_HELLO_POLICY_HOLDER);
-+	ASSERT_RETURN(conn_a == NULL);
-+
-+	conn_a = kdbus_hello_registrar(env->buspath, "example",
-+				       NULL, 0, KDBUS_HELLO_POLICY_HOLDER);
-+	ASSERT_RETURN(conn_a == NULL);
-+
-+	conn_a = kdbus_hello_registrar(env->buspath, "com.example.a",
-+				       NULL, 0, KDBUS_HELLO_POLICY_HOLDER);
-+	ASSERT_RETURN(conn_a);
-+
-+	conn_b = kdbus_hello_registrar(env->buspath, "com.example.b",
-+				       NULL, 0, KDBUS_HELLO_POLICY_HOLDER);
-+	ASSERT_RETURN(conn_b);
-+
-+	/*
-+	 * Verify there cannot be any duplicate entries, except for specific vs.
-+	 * wildcard entries.
-+	 */
-+
-+	access = (struct kdbus_policy_access){
-+		.type = KDBUS_POLICY_ACCESS_USER,
-+		.id = geteuid(),
-+		.access = KDBUS_POLICY_SEE,
-+	};
-+
-+	ret = kdbus_conn_update_policy(conn_a, "com.example.a", &access, 1);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_conn_update_policy(conn_b, "com.example.a", &access, 1);
-+	ASSERT_RETURN(ret == -EEXIST);
-+
-+	ret = kdbus_conn_update_policy(conn_b, "com.example.a.*", &access, 1);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_conn_update_policy(conn_a, "com.example.a.*", &access, 1);
-+	ASSERT_RETURN(ret == -EEXIST);
-+
-+	ret = kdbus_conn_update_policy(conn_a, "com.example.*", &access, 1);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_conn_update_policy(conn_b, "com.example.a", &access, 1);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = kdbus_conn_update_policy(conn_b, "com.example.*", &access, 1);
-+	ASSERT_RETURN(ret == -EEXIST);
-+
-+	/* Invalid name */
-+	ret = kdbus_conn_update_policy(conn_b, ".example.*", &access, 1);
-+	ASSERT_RETURN(ret == -EINVAL);
-+
-+	ret = kdbus_conn_update_policy(conn_b, "example", &access, 1);
-+	ASSERT_RETURN(ret == -EINVAL);
-+
-+	kdbus_conn_free(conn_b);
-+	kdbus_conn_free(conn_a);
-+
-+	return TEST_OK;
-+}
-diff --git a/tools/testing/selftests/kdbus/test-sync.c b/tools/testing/selftests/kdbus/test-sync.c
-new file mode 100644
-index 0000000..0655a54
---- /dev/null
-+++ b/tools/testing/selftests/kdbus/test-sync.c
-@@ -0,0 +1,369 @@
-+#include <stdio.h>
-+#include <string.h>
-+#include <time.h>
-+#include <fcntl.h>
-+#include <stdlib.h>
-+#include <stddef.h>
-+#include <unistd.h>
-+#include <stdint.h>
-+#include <errno.h>
-+#include <assert.h>
-+#include <pthread.h>
-+#include <stdbool.h>
-+#include <signal.h>
-+#include <sys/wait.h>
-+#include <sys/eventfd.h>
-+
-+#include "kdbus-api.h"
-+#include "kdbus-test.h"
-+#include "kdbus-util.h"
-+#include "kdbus-enum.h"
-+
-+static struct kdbus_conn *conn_a, *conn_b;
-+static unsigned int cookie = 0xdeadbeef;
-+
-+static void nop_handler(int sig) {}
-+
-+static int interrupt_sync(struct kdbus_conn *conn_src,
-+			  struct kdbus_conn *conn_dst)
-+{
-+	pid_t pid;
-+	int ret, status;
-+	struct kdbus_msg *msg = NULL;
-+	struct sigaction sa = {
-+		.sa_handler = nop_handler,
-+		.sa_flags = SA_NOCLDSTOP|SA_RESTART,
-+	};
-+
-+	cookie++;
-+	pid = fork();
-+	ASSERT_RETURN_VAL(pid >= 0, pid);
-+
-+	if (pid == 0) {
-+		ret = sigaction(SIGINT, &sa, NULL);
-+		ASSERT_EXIT(ret == 0);
-+
-+		ret = kdbus_msg_send_sync(conn_dst, NULL, cookie,
-+					  KDBUS_MSG_EXPECT_REPLY,
-+					  100000000ULL, 0, conn_src->id, -1);
-+		ASSERT_EXIT(ret == -ETIMEDOUT);
-+
-+		_exit(EXIT_SUCCESS);
-+	}
-+
-+	ret = kdbus_msg_recv_poll(conn_src, 100, &msg, NULL);
-+	ASSERT_RETURN(ret == 0 && msg->cookie == cookie);
-+
-+	kdbus_msg_free(msg);
-+
-+	ret = kill(pid, SIGINT);
-+	ASSERT_RETURN_VAL(ret == 0, ret);
-+
-+	ret = waitpid(pid, &status, 0);
-+	ASSERT_RETURN_VAL(ret >= 0, ret);
-+
-+	if (WIFSIGNALED(status))
-+		return TEST_ERR;
-+
-+	ret = kdbus_msg_recv_poll(conn_src, 100, NULL, NULL);
-+	ASSERT_RETURN(ret == -ETIMEDOUT);
-+
-+	return (status == EXIT_SUCCESS) ? TEST_OK : TEST_ERR;
-+}
-+
-+static int close_epipe_sync(const char *bus)
-+{
-+	pid_t pid;
-+	int ret, status;
-+	struct kdbus_conn *conn_src;
-+	struct kdbus_conn *conn_dst;
-+	struct kdbus_msg *msg = NULL;
-+
-+	conn_src = kdbus_hello(bus, 0, NULL, 0);
-+	ASSERT_RETURN(conn_src);
-+
-+	ret = kdbus_add_match_empty(conn_src);
-+	ASSERT_RETURN(ret == 0);
-+
-+	conn_dst = kdbus_hello(bus, 0, NULL, 0);
-+	ASSERT_RETURN(conn_dst);
-+
-+	cookie++;
-+	pid = fork();
-+	ASSERT_RETURN_VAL(pid >= 0, pid);
-+
-+	if (pid == 0) {
-+		uint64_t dst_id;
-+
-+		/* close our reference */
-+		dst_id = conn_dst->id;
-+		kdbus_conn_free(conn_dst);
-+
-+		ret = kdbus_msg_recv_poll(conn_src, 100, &msg, NULL);
-+		ASSERT_EXIT(ret == 0 && msg->cookie == cookie);
-+		ASSERT_EXIT(msg->src_id == dst_id);
-+
-+		cookie++;
-+		ret = kdbus_msg_send_sync(conn_src, NULL, cookie,
-+					  KDBUS_MSG_EXPECT_REPLY,
-+					  100000000ULL, 0, dst_id, -1);
-+		ASSERT_EXIT(ret == -EPIPE);
-+
-+		_exit(EXIT_SUCCESS);
-+	}
-+
-+	ret = kdbus_msg_send(conn_dst, NULL, cookie, 0, 0, 0,
-+			     KDBUS_DST_ID_BROADCAST);
-+	ASSERT_RETURN(ret == 0);
-+
-+	cookie++;
-+	ret = kdbus_msg_recv_poll(conn_dst, 100, &msg, NULL);
-+	ASSERT_RETURN(ret == 0 && msg->cookie == cookie);
-+
-+	kdbus_msg_free(msg);
-+
-+	/* destroy connection */
-+	kdbus_conn_free(conn_dst);
-+	kdbus_conn_free(conn_src);
-+
-+	ret = waitpid(pid, &status, 0);
-+	ASSERT_RETURN_VAL(ret >= 0, ret);
-+
-+	if (!WIFEXITED(status))
-+		return TEST_ERR;
-+
-+	return (status == EXIT_SUCCESS) ? TEST_OK : TEST_ERR;
-+}
-+
-+static int cancel_fd_sync(struct kdbus_conn *conn_src,
-+			  struct kdbus_conn *conn_dst)
-+{
-+	pid_t pid;
-+	int cancel_fd;
-+	int ret, status;
-+	uint64_t counter = 1;
-+	struct kdbus_msg *msg = NULL;
-+
-+	cancel_fd = eventfd(0, 0);
-+	ASSERT_RETURN_VAL(cancel_fd >= 0, cancel_fd);
-+
-+	cookie++;
-+	pid = fork();
-+	ASSERT_RETURN_VAL(pid >= 0, pid);
-+
-+	if (pid == 0) {
-+		ret = kdbus_msg_send_sync(conn_dst, NULL, cookie,
-+					  KDBUS_MSG_EXPECT_REPLY,
-+					  100000000ULL, 0, conn_src->id,
-+					  cancel_fd);
-+		ASSERT_EXIT(ret == -ECANCELED);
-+
-+		_exit(EXIT_SUCCESS);
-+	}
-+
-+	ret = kdbus_msg_recv_poll(conn_src, 100, &msg, NULL);
-+	ASSERT_RETURN(ret == 0 && msg->cookie == cookie);
-+
-+	kdbus_msg_free(msg);
-+
-+	ret = write(cancel_fd, &counter, sizeof(counter));
-+	ASSERT_RETURN(ret == sizeof(counter));
-+
-+	ret = waitpid(pid, &status, 0);
-+	ASSERT_RETURN_VAL(ret >= 0, ret);
-+
-+	if (WIFSIGNALED(status))
-+		return TEST_ERR;
-+
-+	return (status == EXIT_SUCCESS) ? TEST_OK : TEST_ERR;
-+}
-+
-+static int no_cancel_sync(struct kdbus_conn *conn_src,
-+			  struct kdbus_conn *conn_dst)
-+{
-+	pid_t pid;
-+	int cancel_fd;
-+	int ret, status;
-+	struct kdbus_msg *msg = NULL;
-+
-+	/* pass eventfd, but never signal it so it shouldn't have any effect */
-+
-+	cancel_fd = eventfd(0, 0);
-+	ASSERT_RETURN_VAL(cancel_fd >= 0, cancel_fd);
-+
-+	cookie++;
-+	pid = fork();
-+	ASSERT_RETURN_VAL(pid >= 0, pid);
-+
-+	if (pid == 0) {
-+		ret = kdbus_msg_send_sync(conn_dst, NULL, cookie,
-+					  KDBUS_MSG_EXPECT_REPLY,
-+					  100000000ULL, 0, conn_src->id,
-+					  cancel_fd);
-+		ASSERT_EXIT(ret == 0);
-+
-+		_exit(EXIT_SUCCESS);
-+	}
-+
-+	ret = kdbus_msg_recv_poll(conn_src, 100, &msg, NULL);
-+	ASSERT_RETURN_VAL(ret == 0 && msg->cookie == cookie, -1);
-+
-+	kdbus_msg_free(msg);
-+
-+	ret = kdbus_msg_send_reply(conn_src, cookie, conn_dst->id);
-+	ASSERT_RETURN_VAL(ret >= 0, ret);
-+
-+	ret = waitpid(pid, &status, 0);
-+	ASSERT_RETURN_VAL(ret >= 0, ret);
-+
-+	if (WIFSIGNALED(status))
-+		return -1;
-+
-+	return (status == EXIT_SUCCESS) ? 0 : -1;
-+}
-+
-+static void *run_thread_reply(void *data)
-+{
-+	int ret;
-+	unsigned long status = TEST_OK;
-+
-+	ret = kdbus_msg_recv_poll(conn_a, 3000, NULL, NULL);
-+	if (ret < 0)
-+		goto exit_thread;
-+
-+	kdbus_printf("Thread received message, sending reply ...\n");
-+
-+	/* using an unknown cookie must fail */
-+	ret = kdbus_msg_send_reply(conn_a, ~cookie, conn_b->id);
-+	if (ret != -EBADSLT) {
-+		status = TEST_ERR;
-+		goto exit_thread;
-+	}
-+
-+	ret = kdbus_msg_send_reply(conn_a, cookie, conn_b->id);
-+	if (ret != 0) {
-+		status = TEST_ERR;
-+		goto exit_thread;
-+	}
-+
-+exit_thread:
-+	pthread_exit(NULL);
-+	return (void *) status;
-+}
-+
-+int kdbus_test_sync_reply(struct kdbus_test_env *env)
-+{
-+	unsigned long status;
-+	pthread_t thread;
-+	int ret;
-+
-+	conn_a = kdbus_hello(env->buspath, 0, NULL, 0);
-+	conn_b = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn_a && conn_b);
-+
-+	pthread_create(&thread, NULL, run_thread_reply, NULL);
-+
-+	ret = kdbus_msg_send_sync(conn_b, NULL, cookie,
-+				  KDBUS_MSG_EXPECT_REPLY,
-+				  5000000000ULL, 0, conn_a->id, -1);
-+
-+	pthread_join(thread, (void *) &status);
-+	ASSERT_RETURN(status == 0);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = interrupt_sync(conn_a, conn_b);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = close_epipe_sync(env->buspath);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = cancel_fd_sync(conn_a, conn_b);
-+	ASSERT_RETURN(ret == 0);
-+
-+	ret = no_cancel_sync(conn_a, conn_b);
-+	ASSERT_RETURN(ret == 0);
-+
-+	kdbus_printf("-- closing bus connections\n");
-+
-+	kdbus_conn_free(conn_a);
-+	kdbus_conn_free(conn_b);
-+
-+	return TEST_OK;
-+}
-+
-+#define BYEBYE_ME ((void*)0L)
-+#define BYEBYE_THEM ((void*)1L)
-+
-+static void *run_thread_byebye(void *data)
-+{
-+	struct kdbus_cmd cmd_byebye = { .size = sizeof(cmd_byebye) };
-+	int ret;
-+
-+	ret = kdbus_msg_recv_poll(conn_a, 3000, NULL, NULL);
-+	if (ret == 0) {
-+		kdbus_printf("Thread received message, invoking BYEBYE ...\n");
-+		kdbus_msg_recv(conn_a, NULL, NULL);
-+		if (data == BYEBYE_ME)
-+			kdbus_cmd_byebye(conn_b->fd, &cmd_byebye);
-+		else if (data == BYEBYE_THEM)
-+			kdbus_cmd_byebye(conn_a->fd, &cmd_byebye);
-+	}
-+
-+	pthread_exit(NULL);
-+	return NULL;
-+}
-+
-+int kdbus_test_sync_byebye(struct kdbus_test_env *env)
-+{
-+	pthread_t thread;
-+	int ret;
-+
-+	/*
-+	 * This sends a synchronous message to a thread, which waits until it
-+	 * received the message and then invokes BYEBYE on the *ORIGINAL*
-+	 * connection. That is, on the same connection that synchronously waits
-+	 * for an reply.
-+	 * This should properly wake the connection up and cause ECONNRESET as
-+	 * the connection is disconnected now.
-+	 *
-+	 * The second time, we do the same but invoke BYEBYE on the *TARGET*
-+	 * connection. This should also wake up the synchronous sender as the
-+	 * reply cannot be sent by a disconnected target.
-+	 */
-+
-+	conn_a = kdbus_hello(env->buspath, 0, NULL, 0);
-+	conn_b = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn_a && conn_b);
-+
-+	pthread_create(&thread, NULL, run_thread_byebye, BYEBYE_ME);
-+
-+	ret = kdbus_msg_send_sync(conn_b, NULL, cookie,
-+				  KDBUS_MSG_EXPECT_REPLY,
-+				  5000000000ULL, 0, conn_a->id, -1);
-+
-+	ASSERT_RETURN(ret == -ECONNRESET);
-+
-+	pthread_join(thread, NULL);
-+
-+	kdbus_conn_free(conn_a);
-+	kdbus_conn_free(conn_b);
-+
-+	conn_a = kdbus_hello(env->buspath, 0, NULL, 0);
-+	conn_b = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn_a && conn_b);
-+
-+	pthread_create(&thread, NULL, run_thread_byebye, BYEBYE_THEM);
-+
-+	ret = kdbus_msg_send_sync(conn_b, NULL, cookie,
-+				  KDBUS_MSG_EXPECT_REPLY,
-+				  5000000000ULL, 0, conn_a->id, -1);
-+
-+	ASSERT_RETURN(ret == -EPIPE);
-+
-+	pthread_join(thread, NULL);
-+
-+	kdbus_conn_free(conn_a);
-+	kdbus_conn_free(conn_b);
-+
-+	return TEST_OK;
-+}
-diff --git a/tools/testing/selftests/kdbus/test-timeout.c b/tools/testing/selftests/kdbus/test-timeout.c
-new file mode 100644
-index 0000000..cfd1930
---- /dev/null
-+++ b/tools/testing/selftests/kdbus/test-timeout.c
-@@ -0,0 +1,99 @@
-+#include <stdio.h>
-+#include <string.h>
-+#include <time.h>
-+#include <fcntl.h>
-+#include <stdlib.h>
-+#include <stddef.h>
-+#include <unistd.h>
-+#include <stdint.h>
-+#include <errno.h>
-+#include <assert.h>
-+#include <poll.h>
-+#include <stdbool.h>
-+
-+#include "kdbus-api.h"
-+#include "kdbus-test.h"
-+#include "kdbus-util.h"
-+#include "kdbus-enum.h"
-+
-+int timeout_msg_recv(struct kdbus_conn *conn, uint64_t *expected)
-+{
-+	struct kdbus_cmd_recv recv = { .size = sizeof(recv) };
-+	struct kdbus_msg *msg;
-+	int ret;
-+
-+	ret = kdbus_cmd_recv(conn->fd, &recv);
-+	if (ret < 0) {
-+		kdbus_printf("error receiving message: %d (%m)\n", ret);
-+		return ret;
-+	}
-+
-+	msg = (struct kdbus_msg *)(conn->buf + recv.msg.offset);
-+
-+	ASSERT_RETURN_VAL(msg->payload_type == KDBUS_PAYLOAD_KERNEL, -EINVAL);
-+	ASSERT_RETURN_VAL(msg->src_id == KDBUS_SRC_ID_KERNEL, -EINVAL);
-+	ASSERT_RETURN_VAL(msg->dst_id == conn->id, -EINVAL);
-+
-+	*expected &= ~(1ULL << msg->cookie_reply);
-+	kdbus_printf("Got message timeout for cookie %llu\n",
-+		     msg->cookie_reply);
-+
-+	ret = kdbus_free(conn, recv.msg.offset);
-+	if (ret < 0)
-+		return ret;
-+
-+	return 0;
-+}
-+
-+int kdbus_test_timeout(struct kdbus_test_env *env)
-+{
-+	struct kdbus_conn *conn_a, *conn_b;
-+	struct pollfd fd;
-+	int ret, i, n_msgs = 4;
-+	uint64_t expected = 0;
-+	uint64_t cookie = 0xdeadbeef;
-+
-+	conn_a = kdbus_hello(env->buspath, 0, NULL, 0);
-+	conn_b = kdbus_hello(env->buspath, 0, NULL, 0);
-+	ASSERT_RETURN(conn_a && conn_b);
-+
-+	fd.fd = conn_b->fd;
-+
-+	/*
-+	 * send messages that expect a reply (within 100 msec),
-+	 * but never answer it.
-+	 */
-+	for (i = 0; i < n_msgs; i++, cookie++) {
-+		kdbus_printf("Sending message with cookie %llu ...\n",
-+			     (unsigned long long)cookie);
-+		ASSERT_RETURN(kdbus_msg_send(conn_b, NULL, cookie,
-+			      KDBUS_MSG_EXPECT_REPLY,
-+			      (i + 1) * 100ULL * 1000000ULL, 0,
-+			      conn_a->id) == 0);
-+		expected |= 1ULL << cookie;
-+	}
-+
-+	for (;;) {
-+		fd.events = POLLIN | POLLPRI | POLLHUP;
-+		fd.revents = 0;
-+
-+		ret = poll(&fd, 1, (n_msgs + 1) * 100);
-+		if (ret == 0)
-+			kdbus_printf("--- timeout\n");
-+		if (ret <= 0)
-+			break;
-+
-+		if (fd.revents & POLLIN)
-+			ASSERT_RETURN(!timeout_msg_recv(conn_b, &expected));
-+
-+		if (expected == 0)
-+			break;
-+	}
-+
-+	ASSERT_RETURN(expected == 0);
-+
-+	kdbus_conn_free(conn_a);
-+	kdbus_conn_free(conn_b);
-+
-+	return TEST_OK;
-+}