On 02/02/2011 07:30 AM, Michael Lueck wrote:
Somehow a reported IRIX bug with XFS got into Ubuntu 10.04 (Lucid) starting
with kernel 2.6.32-27.
I am cross posting to this list in order to receive details as to what bug got
in Ubuntu which has
been solved in IRIX, hoping with more details Ubuntu might make the same fix.
Aside from the fact that the errno is the same, there's nothing to suggest
that the Ubuntu problem is the the same bug. The IRIX bug is quite old.
Ubuntu has since updated their kernel to 2.6.32-28 and someone already verified
at the bug report
that the problem persists with that kernel version.
"Regression between 2.6.32-27 and 2.6.32-26 xfsdump SGI_FS_BULKSTAT errno = 22"
Between 2.6.32-26 and 2.6.32-27, Ubuntu backported 4 XFS commits from
2.6.35/2.6.36. All are part of a bulkstat security fix.
% git log Ubuntu-2.6.32-26.48..Ubuntu-2.6.32-27.49 -- fs/xfs | grep commit
(cherry picked from commit 4536f2ad8b330453d7ebec0746c4374eadd649b1)
(backported from commit 7b6259e7a83647948fa33a736cc832310c8d85aa)
(cherry picked from commit 1920779e67cbf5ea8afef317777c5bf2b8096188)
(backported from commit 7124fe0a5b619d65b739477b3b55a20bf805b06d)
I'm not aware of a similar problem upstream, so it would appear
to be a problem with Ubuntu's backport of these commits.
On our Ubuntu 10.04 LTS server running x86 code, this evening a kernel
update was ready for installation. I updated the kernel, rebooted
(IPL'ed), and proceeded with the backup which utilized xfsdump as we use
the xfs filesystem. Four of the xfsdump received a never before seen
error: SGI_FS_BULKSTAT errno = 22
Output as follows:
using file dump (drive_simple) strategy
version 3.0.4 (dump format 3.0) - Running single-threaded
level 0 dump of ldslnx01:/srv
dump date: Mon Dec 20 21:59:33 2010
session id: f98f8cc0-963f-41a6-9a19-a89192502bf0
session label: "data"
ino map phase 1: constructing initial dump list
ino map phase 2: skipping (no pruning necessary)
ino map phase 3: skipping (only one dump stream)
ino map construction complete
estimated dump size: 100739707392 bytes
WARNING: no media label specified
creating dump session media file 0 (media 0, file 0)
dumping ino map
SGI_FS_BULKSTAT failed: Invalid argument (22)
dump size (non-dir files) : 0 bytes
NOTE: dump interrupted: 79 seconds elapsed: may resume later using -R option
Dump Status: INTERRUPT
This backup file did have some size to it. The other three, backing up
smaller amounts of data, were all zero (0) length dump files.
I rebooted to the prior kernel: $ uname -a
Linux ldslnx01 2.6.32-26-generic-pae #48-Ubuntu SMP Wed Nov 24 10:31:20 UTC
2010 i686 GNU/Linux
And the same backup gets to 100% success.
Reboot to the new kernel, same failure.
I think that fairly well illustrates that the problem exists only with
the kernel update installed this evening.
I did come across a reference to this problem on the SGI website:
1.6.17 Bugs fixed in IRIX 6.5.13
+ 816457: xfsdump SGI_FS_BULKSTAT errno = 22 cxfs
So evidently it is something that has been seen and corrected in IRIX.