Re: xfs_iunlink_remove: xfs_inotobp() returned error 22 -- debugging

符永涛
2013-04-19T15:18:58Z

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Dear Eric,
If it's racing issue where the lock is introduced? I want to study the code
from you. Thank you.

2013/4/19 符永涛 <yongtaofu@gmail.com>

> Sure the serious thing here is that it corrupt the unlinked list. The
> inode 0x1bd33 which trigger xfs shutdown is not 0x6b133.
>
>
> 2013/4/19 Eric Sandeen <sandeen@sandeen.net>
>
>> On 4/19/13 4:41 AM, 符永涛 wrote:
>> > Dear Brian and Eric,
>> >
>> > kernel kernel-2.6.32-279.19.1.el6.x86_64.rpm <
>> http://mirror.linux.duke.edu/pub/centos/6.3/updates/x86_64/Packages/kernel-2.6.32-279.19.1.el6.x86_64.rpm>
>> still have this problem
>> > I build the kernel from this srpm
>> >
>> https://oss.oracle.com/ol6/SRPMS-updates/kernel-2.6.32-279.19.1.el6.src.rpm
>> >
>> > today the shutdown happens again during test.
>> > Seelogs bellow:
>> >
>> > /var/log/message
>> > Apr 19 16:40:05 10 kernel: XFS (sdb): xfs_iunlink_remove: xfs_inotobp()
>> returned error 22.
>> > Apr 19 16:40:05 10 kernel: XFS (sdb): xfs_inactive: xfs_ifree returned
>> error 22
>> > Apr 19 16:40:05 10 kernel: XFS (sdb): xfs_do_force_shutdown(0x1) called
>> from line 1184 of file fs/xfs/xfs_vnodeops.c. Return address =
>> 0xffffffffa02d4bda
>> > Apr 19 16:40:05 10 kernel: XFS (sdb): I/O Error Detected. Shutting down
>> filesystem
>> > Apr 19 16:40:05 10 kernel: XFS (sdb): Please umount the filesystem and
>> rectify the problem(s)
>> > Apr 19 16:40:07 10 kernel: XFS (sdb): xfs_log_force: error 5 returned.
>> > Apr 19 16:40:37 10 kernel: XFS (sdb): xfs_log_force: error 5 returned.
>> >
>> > systemtap script output:
>> > --- xfs_imap -- module("xfs").function("xfs_imap@fs/xfs/xfs_ialloc.c:1257").return
>> -- return=0x16
>> > vars: mp=0xffff88101801e800 tp=0xffff880ff143ac70 ino=0xffffffff
>> imap=0xffff88100e93bc08 flags=0x0 agbno=? agino=? agno=? blks_per_cluster=?
>> chunk_agbno=? cluster_agbno=? error=? offset=? offset_agbno=? __func__=[...]
>> > mp: m_agno_log = 0x5, m_agino_log = 0x20
>> > mp->m_sb: sb_agcount = 0x1c, sb_agblocks = 0xffffff0, sb_inopblog =
>> 0x4, sb_agblklog = 0x1c, sb_dblocks = 0x1b4900000
>> > imap: im_blkno = 0x0, im_len = 0xe778, im_boffset = 0xd997
>> > kernel backtrace:
>> > Returning from: 0xffffffffa02b4260 : xfs_imap+0x0/0x280 [xfs]
>> > Returning to : 0xffffffffa02b9d59 : xfs_inotobp+0x49/0xc0 [xfs]
>> > 0xffffffffa02b9ec1 : xfs_iunlink_remove+0xf1/0x360 [xfs]
>> > 0xffffffff814ede89
>> > 0x0 (inexact)
>> > user backtrace:
>> > 0x3ec260e5ad [/lib64/libpthread-2.12.so <http://libpthread-2.12.so
>> >+0xe5ad/0x219000]
>> >
>> > --- xfs_iunlink_remove -- module("xfs").function("xfs_iunlink_remove@fs/xfs/xfs_inode.c:1681").return
>> -- return=0x16
>> > vars: tp=0xffff880ff143ac70 ip=0xffff8811ed111000 next_ino=? mp=? agi=?
>> dip=? agibp=? ibp=? agno=? agino=? next_agino=? last_ibp=?
>> last_dip=0xffff881000000001 bucket_index=? offset=?
>> last_offset=0xffffffffffff8811 error=? __func__=[...]
>> > ip: i_ino = 0x1bd33, i_flags = 0x0
>> > ip->i_d: di_nlink = 0x0, di_gen = 0x53068791
>> >
>> > debugfs events trace:
>> >
>> https://docs.google.com/file/d/0B7n2C4T5tfNCREZtdC1yamc0RnM/edit?usp=sharing
>>
>> Same issue, one file was unlinked twice in a race:
>>
>> === ino 0x6b133 ===
>> <...>-4477 [003] 2721.176790: xfs_iunlink: dev 8:16 ino
>> 0x6b133
>> <...>-4477 [003] 2721.176839: xfs_iunlink_remove: dev 8:16
>> ino 0x6b133
>> <...>-4477 [009] 3320.127227: xfs_iunlink: dev 8:16 ino
>> 0x6b133
>> <...>-4477 [001] 3320.141126: xfs_iunlink_remove: dev 8:16
>> ino 0x6b133
>> <...>-4477 [003] 7973.136368: xfs_iunlink: dev 8:16 ino
>> 0x6b133
>> <...>-4479 [018] 7973.158457: xfs_iunlink: dev 8:16 ino
>> 0x6b133
>> <...>-4479 [018] 7973.158497: xfs_iunlink_remove: dev 8:16
>> ino 0x6b133
>>
>> -Eric
>>
>>
>
>
> --
> 符永涛
>

--
符永涛

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