<HTML><HEAD></HEAD>
<BODY dir=ltr>
<DIV dir=ltr>
<DIV style="FONT-FAMILY: 'Verdana'; COLOR: #000000; FONT-SIZE: 10pt">
<DIV>Greetings,</DIV>
<DIV>we encountered XFS corruption:</DIV>
<DIV> </DIV>
<DIV>kernel: [774772.852316] ffff8801018c5000: 05 d1 fd 01 fd ff 2f ec 2f 8d 82
6a 81 fe c2 0f .....././..j.... </DIV>
<DIV>kernel: [774772.854820] XFS (dm-72): Internal error xfs_bmbt_verify at line
747 of file
/mnt/share/builds/14.09--3.8.13-030813-generic/2014-11-30_15-47-58--14.09-1419-28/src/zadara-btrfs/fs/xfs/xfs_bmap_btree.c.
Caller 0xffffffffa077b6be</DIV>
<DIV>kernel:
[774772.854820]
</DIV>
<DIV>kernel: [774772.860766] Pid: 14643, comm: kworker/0:0H Tainted:
GF W O 3.8.13-030813-generic
#20130511184</DIV>
<DIV>kernel: [774772.860771] Call
Trace:
</DIV>
<DIV>kernel: [774772.860909] [<ffffffffa074abaf>]
xfs_error_report+0x3f/0x50
[xfs]
</DIV>
<DIV>kernel: [774772.860961] [<ffffffffa077b6be>] ?
xfs_bmbt_read_verify+0xe/0x10
[xfs]
</DIV>
<DIV>kernel: [774772.860985] [<ffffffffa074ac1e>]
xfs_corruption_error+0x5e/0x90
[xfs]
</DIV>
<DIV>kernel: [774772.861014] [<ffffffffa077b537>]
xfs_bmbt_verify+0x77/0x1e0
[xfs]
</DIV>
<DIV>kernel: [774772.861047] [<ffffffffa077b6be>] ?
xfs_bmbt_read_verify+0xe/0x10
[xfs]
</DIV>
<DIV>kernel: [774772.861077] [<ffffffff810135aa>] ?
__switch_to+0x12a/0x4a0
</DIV>
<DIV>kernel: [774772.861129] [<ffffffff81096cd8>] ?
set_next_entity+0xa8/0xc0
</DIV>
<DIV>kernel: [774772.861145] [<ffffffffa077b6be>]
xfs_bmbt_read_verify+0xe/0x10
[xfs]
</DIV>
<DIV>kernel: [774772.861157] [<ffffffffa074848f>]
xfs_buf_iodone_work+0x3f/0xa0
[xfs]
</DIV>
<DIV>kernel: [774772.861161] [<ffffffff81078b81>]
process_one_work+0x141/0x490
</DIV>
<DIV>kernel: [774772.861164] [<ffffffff81079b48>]
worker_thread+0x168/0x400
</DIV>
<DIV>kernel: [774772.861166] [<ffffffff810799e0>] ?
manage_workers+0x120/0x120
</DIV>
<DIV>kernel: [774772.861170] [<ffffffff8107f050>]
kthread+0xc0/0xd0
</DIV>
<DIV>kernel: [774772.861172] [<ffffffff8107ef90>] ?
flush_kthread_worker+0xb0/0xb0
</DIV>
<DIV>kernel: [774772.861193] [<ffffffff816f61ec>]
ret_from_fork+0x7c/0xb0
</DIV>
<DIV>kernel: [774772.861199] [<ffffffff8107ef90>] ?
flush_kthread_worker+0xb0/0xb0
</DIV>
<DIV>kernel: [774772.861318] XFS (dm-72): Corruption detected. Unmount and run
xfs_repair
</DIV>
<DIV>kernel: [774772.863449] XFS (dm-72): metadata I/O error: block 0x2434e3e8
("xfs_trans_read_buf_map") error 117 numblks 8</DIV>
<DIV> </DIV>
<DIV>All the corruption reports were for the same block 0x2434e3e8, which
according to the code is simply disk address (xfs_daddr_t) 607445992. So there
was only one block corrupted.</DIV>
<DIV> </DIV>
<DIV>Some time later, XFS crashed with:</DIV>
<DIV>[813114.622928] NULL pointer dereference[813114.622928] at
0000000000000008</DIV>
<DIV>[813114.622928] IP: [<ffffffffa077bad9>] xfs_bmbt_get_all+0x9/0x20
[xfs]</DIV>
<DIV>[813114.622928] PGD 0 </DIV>
<DIV>[813114.622928] Oops: 0000 [#1] SMP </DIV>
<DIV>[813114.622928] CPU 2 </DIV>
<DIV>[813114.622928] Pid: 31120, comm: smbd Tainted:
GF W O 3.8.13-030813-generic
#201305111843 Bochs Bochs</DIV>
<DIV>[813114.622928] RIP: 0010:[<ffffffffa077bad9>]
[<ffffffffa077bad9>] xfs_bmbt_get_all+0x9/0x20 [xfs]</DIV>
<DIV>[813114.622928] RSP: 0018:ffff88010a193798 EFLAGS: 00010297</DIV>
<DIV>[813114.622928] RAX: 0000000000000964 RBX: ffff880180fa9c38 RCX:
ffffa5a5a5a5a5a5</DIV>
<DIV>[813114.622928] RDX: ffff88010a193898 RSI: ffff88010a193898 RDI:
0000000000000000</DIV>
<DIV>[813114.622928] RBP: ffff88010a1937f8 R08: ffff88010a193898 R09:
ffff88010a1938b8</DIV>
<DIV>[813114.622928] R10: ffffea0005de0940 R11: 0000000000004d0e R12:
ffff88010a1938dc</DIV>
<DIV>[813114.622928] R13: ffff88010a1938e0 R14: ffff88010a193898 R15:
ffff88010a1938b8</DIV>
<DIV>[813114.622928] FS: 00007eff2dc7e700(0000) GS:ffff88021fd00000(0000)
knlGS:0000000000000000</DIV>
<DIV>[813114.622928] CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033</DIV>
<DIV>[813114.622928] CR2: 0000000000000008 CR3: 0000000109574000 CR4:
00000000001406e0</DIV>
<DIV>[813114.622928] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000</DIV>
<DIV>[813114.622928] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7:
0000000000000400</DIV>
<DIV>[813114.622928] Process smbd (pid: 31120, threadinfo ffff88010a192000, task
ffff88011687ae80)</DIV>
<DIV>[813114.622928] Stack:</DIV>
<DIV>[813114.622928] ffff88010a1937f8 ffffffffa076f85a ffffffffffffffff
0000000000000000</DIV>
<DIV>[813114.622928] ffffffff816ec509 000000000a193830 ffffffff816ed31d
ffff88010a193898</DIV>
<DIV>[813114.622928] ffff880180fa9c00 0000000000000000 ffff88010a1938dc
ffff88010a1938e0</DIV>
<DIV>[813114.622928] Call Trace:</DIV>
<DIV>[813114.622928] [<ffffffffa076f85a>] ?
xfs_bmap_search_multi_extents+0xaa/0x110 [xfs]</DIV>
<DIV>[813114.622928] [<ffffffff816ec509>] ? schedule+0x29/0x70</DIV>
<DIV>[813114.622928] [<ffffffff816ed31d>] ?
rwsem_down_failed_common+0xcd/0x170</DIV>
<DIV>[813114.622928] [<ffffffffa076f92e>]
xfs_bmap_search_extents+0x6e/0xf0 [xfs]</DIV>
<DIV>[813114.622928] [<ffffffffa0778d6c>] xfs_bmapi_read+0xfc/0x2f0
[xfs]</DIV>
<DIV>[813114.622928] [<ffffffffa0792a49>] ?
xfs_ilock_map_shared+0x49/0x60 [xfs]</DIV>
<DIV>[813114.622928] [<ffffffffa07459a8>]
__xfs_get_blocks+0xe8/0x550 [xfs]</DIV>
<DIV>[813114.622928] [<ffffffff8135d8c4>] ?
call_rwsem_down_read_failed+0x14/0x30</DIV>
<DIV>[813114.622928] [<ffffffffa0745e41>] xfs_get_blocks+0x11/0x20
[xfs]</DIV>
<DIV>[813114.622928] [<ffffffff811d05b7>]
block_read_full_page+0x127/0x360</DIV>
<DIV>[813114.622928] [<ffffffffa0745e30>] ?
xfs_get_blocks_direct+0x20/0x20 [xfs]</DIV>
<DIV>[813114.622928] [<ffffffff811d9b0f>]
do_mpage_readpage+0x35f/0x550</DIV>
<DIV>[813114.622928] [<ffffffff816f1025>] ?
do_async_page_fault+0x35/0x90</DIV>
<DIV>[813114.622928] [<ffffffff816edd48>] ?
async_page_fault+0x28/0x30</DIV>
<DIV>[813114.622928] [<ffffffff811d9d4f>]
mpage_readpage+0x4f/0x70</DIV>
<DIV>[813114.622928] [<ffffffffa0745e30>] ?
xfs_get_blocks_direct+0x20/0x20 [xfs]</DIV>
<DIV>[813114.622928] [<ffffffff81134da8>] ?
file_read_actor+0x68/0x160</DIV>
<DIV>[813114.622928] [<ffffffff81134e04>] ?
file_read_actor+0xc4/0x160</DIV>
<DIV>[813114.622928] [<ffffffff81354bfe>] ?
radix_tree_lookup_slot+0xe/0x10</DIV>
<DIV>[813114.622928] [<ffffffffa07451b8>] xfs_vm_readpage+0x18/0x20
[xfs]</DIV>
<DIV>[813114.622928] [<ffffffff811364ad>]
do_generic_file_read.constprop.31+0x10d/0x440</DIV>
<DIV>[813114.622928] [<ffffffff811374d1>]
generic_file_aio_read+0xe1/0x220</DIV>
<DIV>[813114.622928] [<ffffffffa074fb98>]
xfs_file_aio_read+0x1c8/0x330 [xfs]</DIV>
<DIV>[813114.622928] [<ffffffff8119ad93>]
do_sync_read+0xa3/0xe0</DIV>
<DIV>[813114.622928] [<ffffffff8119b4d0>] vfs_read+0xb0/0x180</DIV>
<DIV>[813114.622928] [<ffffffff8119b77a>]
sys_pread64+0x9a/0xa0</DIV>
<DIV>[813114.622928] [<ffffffff816f629d>]
system_call_fastpath+0x1a/0x1f</DIV>
<DIV>[813114.622928] Code: d8 4c 8b 65 e0 4c 8b 6d e8 4c 8b 75 f0 4c 8b 7d f8 c9
c3 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 f2
<48> 8b 77 08 48 8b 3f 48 89 e5 e8 48 f8 ff ff 5d c3 66 0f 1f 44 </DIV>
<DIV>[813114.622928] RIP [<ffffffffa077bad9>]
xfs_bmbt_get_all+0x9/0x20 [xfs]</DIV>
<DIV>[813114.622928] RSP <ffff88010a193798></DIV>
<DIV>[813114.622928] CR2: 0000000000000008</DIV>
<DIV>[813114.721138] ---[ end trace cce2a358d4050d3d ]---</DIV>
<DIV> </DIV>
<DIV>We are running XFS based on kernel 3.8.13, with our changes for large-block
discard in <A
href="https://github.com/zadarastorage/zadara-xfs-pushback">https://github.com/zadarastorage/zadara-xfs-pushback</A>.</DIV>
<DIV> </DIV>
<DIV>We analyzed several suspects, but all of them fall on disk addresses not
near the corrupted disk address. I realize that running somewhat outdated kernel
+ our changes within XFSs, points back at us, but this is first time we see XFS
corruption after about a year of this code being exercised. So posting here,
just in case this is a known issue.</DIV>
<DIV> </DIV>
<DIV>I must point out that xfs_repair was able to fix this, which was
awesome!</DIV>
<DIV> </DIV>
<DIV>Thanks,</DIV>
<DIV>Alex.</DIV>
<DIV> </DIV>
<DIV> </DIV></DIV></DIV></BODY></HTML>