Hi,
I'm observing the following strange behavior. If I try to auto-mount a
reiserfs partition via autofs it does not get unmounted when the mount
expires. I have tried a few other filesystems (ext3, tmpfs, fuse) and
the problem appears only with reiserfs and only when automount is using
/dev/autofs. There are no error messages in the log. The reiserfs mount
remains mounted as if it was busy, but I'm pretty sure it is not busy,
because lsof reports no open handles and I can unmount it at any moment
with 'umount'. If I configure automount to run without /dev/autofs then
everything is unmounted as expected.
Here is a sequence of commands to reproduce the problem. It should be
run as root and bash shell is assumed. The automount daemon must be
using /dev/autofs.
cd /tmp/
mkdir autofs-test
cd autofs-test/
dd if=/dev/zero of=e3.img bs=1024 count=131072
cp e3.img r3.img
modprobe loop # if necessary
losetup /dev/loop0 /tmp/autofs-test/e3.img
losetup /dev/loop1 /tmp/autofs-test/r3.img
mkfs -t ext3 /dev/loop0
mkfs -t reiserfs /dev/loop1
echo \
$'e3 -fstype=ext3,ro :/dev/loop0\nr3 -fstype=reiserfs,ro :/dev/loop1' \
> auto.test
mkdir test
echo '/tmp/autofs-test/test /tmp/autofs-test/auto.test --ghost' \
>> ${wherever_the_master_map_is}/auto.master
/etc/init.d/autofs reload
ls test/{e3,r3}
These commands create two filesystem images attached to loop devices.
One is formatted with ext3 an the other one with reiserfs. The last
command triggers automounting of both of them. After that one should
wait a bit longer than the expiry timeout and then run 'mount' or 'cat
/proc/mounts' to see that ext3 has been unmounted, while reiserfs hasn't.
Can anyone, please, try to reproduce the problem?
I'm using vanilla kernel 2.6.28.9 and autofs 5.0.4 (with all 36 patches
available at the moment). I did not install any kernel patches, since I
understood from this message: http://lkml.org/lkml/2008/11/3/383 that
none are necessary (is that correct?).
I appreciate any help to figure out if it is a bug or something is wrong
with my system.
--
Sergei.
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