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
--
Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are watching the assignee of the bug.
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=bug-53951-13602@https.bugzilla.kernel.org/ \
--to=bugzilla-daemon@bugzilla.kernel.org \
--cc=linux-ext4@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).