[LU-6996] osd_ea_lookup_rec assertion

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.8.0
• Affects Version/s: Lustre 2.5.3
• Environment: 2.5.3-2.6.32_431.29.2.el6.atlas.x86_64_g57d5785
• Severity: 3
• Assignee: Alex Zhuravlev
• Reporter: Matt Ezell

Description

This morning a production MDS hit an assertion:

<0>[2551157.740086] LustreError: 14993:0:(osd_handler.c:4071:osd_ea_lookup_rec()) ASSERTION( dir->i_op != ((void *)0) && dir->i_op->lookup != ((void *)0) ) failed: 
<0>[2551157.756253] LustreError: 14993:0:(osd_handler.c:4071:osd_ea_lookup_rec()) LBUG
<4>[2551157.764766] Pid: 14993, comm: mdt01_094
<4>[2551157.769360] 
<4>[2551157.769361] Call Trace:
<4>[2551157.774374]  [<ffffffffa0409895>] libcfs_debug_dumpstack+0x55/0x80 [libcfs]
<4>[2551157.782474]  [<ffffffffa0409e97>] lbug_with_loc+0x47/0xb0 [libcfs]
<4>[2551157.789707]  [<ffffffffa0ca8fcf>] osd_index_ea_lookup+0x6ff/0x8a0 [osd_ldiskfs]
<4>[2551157.798308]  [<ffffffffa0d0dde0>] ? mdt_blocking_ast+0x0/0x2a0 [mdt]
<4>[2551157.805733]  [<ffffffffa088c7c0>] ? lod_index_lookup+0x0/0x30 [lod]
<4>[2551157.813056]  [<ffffffffa088c7e5>] lod_index_lookup+0x25/0x30 [lod]
<4>[2551157.820291]  [<ffffffffa0dd0daa>] __mdd_lookup+0x24a/0x440 [mdd]
<4>[2551157.827325]  [<ffffffffa0dd1599>] mdd_lookup+0x39/0xe0 [mdd]
<4>[2551157.833977]  [<ffffffffa0d3bee5>] ? mdt_name+0x35/0xc0 [mdt]
<4>[2551157.840629]  [<ffffffffa0d44b09>] mdt_reint_open+0xb69/0x21a0 [mdt]
<4>[2551157.847959]  [<ffffffffa0426376>] ? upcall_cache_get_entry+0x296/0x880 [libcfs]
<4>[2551157.856570]  [<ffffffffa05c7a80>] ? lu_ucred+0x20/0x30 [obdclass]
<4>[2551157.863705]  [<ffffffffa0d2d481>] mdt_reint_rec+0x41/0xe0 [mdt]
<4>[2551157.870643]  [<ffffffffa0d12ed3>] mdt_reint_internal+0x4c3/0x780 [mdt]
<4>[2551157.878254]  [<ffffffffa0d1345e>] mdt_intent_reint+0x1ee/0x410 [mdt]
<4>[2551157.885669]  [<ffffffffa0d10c3e>] mdt_intent_policy+0x3ae/0x770 [mdt]
<4>[2551157.893212]  [<ffffffffa06e42e5>] ldlm_lock_enqueue+0x135/0x980 [ptlrpc]
<4>[2551157.901044]  [<ffffffffa070de2b>] ldlm_handle_enqueue0+0x51b/0x10c0 [ptlrpc]
<4>[2551157.909336]  [<ffffffffa0d11106>] mdt_enqueue+0x46/0xe0 [mdt]
<4>[2551157.916083]  [<ffffffffa0d15ada>] mdt_handle_common+0x52a/0x1470 [mdt]
<4>[2551157.923701]  [<ffffffffa0d52595>] mds_regular_handle+0x15/0x20 [mdt]
<4>[2551157.931144]  [<ffffffffa073cf25>] ptlrpc_server_handle_request+0x385/0xc00 [ptlrpc]
<4>[2551157.940128]  [<ffffffffa040a4ce>] ? cfs_timer_arm+0xe/0x10 [libcfs]
<4>[2551157.947452]  [<ffffffffa041b7c5>] ? lc_watchdog_touch+0x65/0x170 [libcfs]
<4>[2551157.955380]  [<ffffffffa07358f9>] ? ptlrpc_wait_event+0xa9/0x2d0 [ptlrpc]
<4>[2551157.963287]  [<ffffffff810546b9>] ? __wake_up_common+0x59/0x90
<4>[2551157.970142]  [<ffffffffa073f6ed>] ptlrpc_main+0xaed/0x1930 [ptlrpc]
<4>[2551157.977487]  [<ffffffffa073ec00>] ? ptlrpc_main+0x0/0x1930 [ptlrpc]
<4>[2551157.984809]  [<ffffffff8109abf6>] kthread+0x96/0xa0
<4>[2551157.990580]  [<ffffffff8100c20a>] child_rip+0xa/0x20
<4>[2551157.998367]  [<ffffffff8109ab60>] ? kthread+0x0/0xa0
<4>[2551158.004229]  [<ffffffff8100c200>] ? child_rip+0x0/0x20
<4>[2551158.010272] 
<0>[2551158.012746] Kernel panic - not syncing: LBUG