Re: [gentoo-user] cryptsetup close and device in use when it is not

[Dale]

Ramon Fischer wrote:
> OK, if it could be "udev", you might want to try to check the following:
>
>    $ grep -rF "<part_of_uuid>" /etc/udev/rules.d/
>    $ grep -rF "<part_of_uuid>" /lib/udev/rules.d/
>    $ grep -rF "<part_of_uuid>" /etc
>
> You could also try to search for the partition device, maybe there
> will be some interesting configuration files.
>
> If you are using "systemd", you might want to check every service unit
> file as well:
>
>    $ systemctl
>
> Recently, I had a similar issue with "cryptsetup" on Raspbian, where
> the "/etc/crypttab" was faulty, which may be applicable here. It had
> the following entry:
>
>    # <accident_paste_with_uuid> # <target name> <source device> [...]
>    <entry1>
>    <entry2>
>
> Therefore, the systemd service unit
> "systemd-cryptsetup@dev-disk-by\x2duuid-#<accident_paste_with_uuid> #
> <target name> <source device> [...]" - if I remember correctly - failed.
> It seems, that "systemd-cryptsetup-generator" only searches for
> matching UUIDs in "/etc/crypttab", even, if they are commented and
> creates service units for each match in "/run/systemd/generator/".
> I remember, that I had issues to access the hard drive. Nevertheless,
> I was able to mount it normally, due to the other correct entry(?).
>
> By removing the accidentally pasted UUID from "/etc/crypttab" and
> rebooting, I was able to use the hard drive without issues again.
>
> Maybe this is something, where you could poke around? :)
>
> -Ramon

I'm running openrc here.  I don't recall making any udev rules
recently.  This is a list of what I have.


root@fireball / # ls -al /etc/udev/rules.d/
total 20
drwxr-xr-x 2 root root 4096 Apr 27 15:07 .
drwxr-xr-x 3 root root 4096 Jul 27 03:17 ..
-rw-r--r-- 1 root root 2064 Apr 27 15:07 69-libmtp.rules
-rw-r--r-- 1 root root 1903 Apr  4  2012 70-persistent-cd.rules
-rw-r--r-- 1 root root  814 Jan  1  2008 70-persistent-net.rules
-rw-r--r-- 1 root root    0 Mar 22  2015 80-net-name-slot.rules
root@fireball / #


One is for CD/DVD stuff.  I wonder if I can remove that now.  Two is for
network cards and top one is something to do with my old Motorola cell
phone, rest in peace. 

All this said, it did it again last night.  I tried a few things and
went to bed while my updates were compiling.  When I got up a bit ago,
it closed just fine.  So, something says it is busy but eventually
releases it if left alone for a while.  I'd like to know what it is and
if it is really in use or not.  Thing is, I can't find a way to know
what it is that is using it.  The dmsetup command shows it is in use but
no way to know what is using it. 

Dale

:-)  :-)