From: bugzilla-daemon@bugzilla.kernel.org
To: linux-ext4@vger.kernel.org
Subject: [Bug 53951] New: race condition on mounting local disks with autofs
Date: Sat, 16 Feb 2013 15:55:41 +0000 (UTC) [thread overview]
Message-ID: <bug-53951-13602@https.bugzilla.kernel.org/> (raw)
https://bugzilla.kernel.org/show_bug.cgi?id=53951
Summary: race condition on mounting local disks with autofs
Product: File System
Version: 2.5
Kernel Version: 3.7.7
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: ext4
AssignedTo: fs_ext4@kernel-bugs.osdl.org
ReportedBy: harri@afaics.de
Regression: No
I am using autofs to mount a local disk to /misc/data6 on request. Problem: It
seems that the first access silently fails, if the disk is not yet mounted.
Below is an example. Before running it I had umounted /misc/data6 and restarted
autofs.
% find /misc/data6 | wc -l; find /misc/data6 | wc -l
18
find: `/misc/data6/lost+found': Permission denied
358
As you can see, the first "find" sees just a subset of the directory entries.
The second "find" stumbles over lost+found (as expected) and finds all entries.
Kernel is 3.7.7. There is no error message in kernel.log, only a line to
mention the mount:
EXT4-fs (sdd1): mounted filesystem with ordered data mode. Opts: (null)
/etc/auto.master:
/misc /etc/auto.misc
/etc/auto.misc:
data1 -fstype=auto,noatime :/dev/disk/by-label/data1
data2 -fstype=auto,noatime :/dev/disk/by-label/data2
data3 -fstype=auto,noatime :/dev/disk/by-label/data3
data4 -fstype=auto,noatime :/dev/disk/by-label/data4
data5 -fstype=auto,noatime :/dev/disk/by-label/data5
data6 -fstype=auto,noatime :/dev/disk/by-label/data6
data7 -fstype=auto,noatime :/dev/disk/by-label/data7
data8 -fstype=auto,noatime :/dev/disk/by-label/data8
The problem is reproducible, as it seems. Please mail if I can help to track
this down.
Regards
Harri
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next reply other threads:[~2013-02-16 15:55 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-16 15:55 bugzilla-daemon [this message]
2014-02-05 17:03 ` [Bug 53951] race condition on mounting local disks with autofs bugzilla-daemon
2014-02-05 17:49 ` Theodore Ts'o
2014-02-06 0:18 ` Ian Kent
2014-02-05 17:49 ` bugzilla-daemon
2014-02-06 0:19 ` bugzilla-daemon
2014-02-07 17:58 ` bugzilla-daemon
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