From: "Badics, Alex" <alex.badics@balabit.com>
To: autofs@vger.kernel.org
Subject: Autofs + shared mount namespaces
Date: Tue, 12 Sep 2017 15:17:43 +0200 [thread overview]
Message-ID: <CAJsjXgryH912APrqk3rzECB=MHKdDg_ROfa6mjTETKKBrW7mmg@mail.gmail.com> (raw)
Hi,
We've been trying out autofs with both systemd-automount and the
autofs userspace daemon, and it seems like it incorrectly marks a
mountpoint as "expired" even though it's still in use in a different
mount namespace. Am I doing something wrong? Are mount namespaces
supported by the autofs driver?
Reproduction:
/etc/autofs/auto.master:
/mnt/test /etc/autofs/auto.test.nfs --timeout 10
/etc/autofs/auto.test.nfs:
test -rw,soft,intr server.domain:/exports/nfs
On one tab, I start autofs:
# automount -f -v
On another, I unshare a namespace, and cd into the test directory:
# cd /mnt
# unshare -m --propagation shared
# cd test/test
And just wait. The mount correctly happens, but after 10 seconds, the
autofs daemon gets an expired message and tries to umount hte nfs
mount, and fails, because it's busy. It retries until I cd out of the
nfs directory, then it of course succeeds:
Starting automounter version 5.1.3, master map auto.master
using kernel protocol version 5.02
mounted indirect on /mnt/test with timeout 10, freq 3 seconds
attempting to mount entry /mnt/test/test
mounted /mnt/test/test
1 remaining in /mnt/test
1 remaining in /mnt/test
1 remaining in /mnt/test
expiring path /mnt/test/test
>> umount.nfs4: /mnt/test/test: device is busy
>> umount.nfs4: /mnt/test/test: device is busy
>> umount.nfs4: /mnt/test/test: device is busy
Unable to update the mtab file, /proc/mounts and /etc/mtab will differ
expired /mnt/test/test
1 remaining in /mnt/test
1 remaining in /mnt/test
1 remaining in /mnt/test
1 remaining in /mnt/test
expiring path /mnt/test/test
expired /mnt/test/test
Thanks,
Alex Badics
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next reply other threads:[~2017-09-12 13:17 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-12 13:17 Badics, Alex [this message]
2017-09-14 0:51 ` Autofs + shared mount namespaces Ian Kent
2017-09-14 8:52 ` Badics, Alex
2017-09-14 10:57 ` Ian Kent
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