[gentoo-catalyst] [PATCH 11/12] catalyst: Remove mount_safety_check()

[Matt Turner <mattst88@gentoo.org>]

mount_safety_check() exists to prevent bad things from happening if a
previous catalyst invocation left bind mounts active in the chroot.
E.g., a previous catalyst invocation is interrupted without unmounting
the bind mounts. A new catalyst invocation runs and cleans the old
chroot, which inadvertently deletes files outside of the chroot via the
bind mounts.

With all the mounts now inside a namespace, it is no longer possible to
have mounts accessible outside the build sequence. In fact, I think this
code has been unnecessary since commit e5a53e42 ("catalyst: create
namespaces for building").

Signed-off-by: Matt Turner <mattst88@gentoo.org>
---
 catalyst/base/stagebase.py | 37 -------------------------------------
 1 file changed, 37 deletions(-)

diff --git a/catalyst/base/stagebase.py b/catalyst/base/stagebase.py
index 5fc11eae..d5454b77 100644
--- a/catalyst/base/stagebase.py
+++ b/catalyst/base/stagebase.py
@@ -638,39 +638,7 @@ class StageBase(TargetBase, ClearBase, GenBase):
             assert self.settings[verify] == "blake2"
             self.settings.setdefault("gk_mainargs", []).append("--b2sum")
 
-    def mount_safety_check(self):
-        """
-        Check and verify that none of our paths in mypath are mounted. We don't
-        want to clean up with things still mounted, and this allows us to check.
-        Returns 1 on ok, 0 on "something is still mounted" case.
-        """
-
-        if not os.path.exists(self.settings["chroot_path"]):
-            return
-
-        log.debug('self.mount = %s', self.mount)
-        for x in [x for x in self.mount if self.mount[x]['enable']]:
-            target = normpath(self.settings['chroot_path'] +
-                              self.mount[x]['target'])
-            log.debug('mount_safety_check() x = %s %s', x, target)
-            if not os.path.exists(target):
-                continue
-
-            if ismount(target):
-                # Something is still mounted
-                try:
-                    log.warning(
-                        '%s is still mounted; performing auto-bind-umount...', target)
-                    # Try to umount stuff ourselves
-                    self.unbind()
-                    if ismount(target):
-                        raise CatalystError("Auto-unbind failed for " + target)
-                    log.notice('Auto-unbind successful...')
-                except CatalystError:
-                    raise CatalystError("Unable to auto-unbind " + target)
-
     def unpack(self):
-
         clst_unpack_hash = self.resume.get("unpack")
 
         # Set up all unpack info settings
@@ -755,8 +723,6 @@ class StageBase(TargetBase, ClearBase, GenBase):
                     % self.settings["source_path"])
 
         if _unpack:
-            self.mount_safety_check()
-
             if invalid_chroot:
                 if "autoresume" in self.settings["options"]:
                     log.notice(
@@ -1363,9 +1329,6 @@ class StageBase(TargetBase, ClearBase, GenBase):
     def run(self):
         self.chroot_lock.write_lock()
 
-        # Check for mounts right away and abort if we cannot unmount them
-        self.mount_safety_check()
-
         if "clear-autoresume" in self.settings["options"]:
             self.clear_autoresume()
 
-- 
2.26.2