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* Oops on mounting (presumably damaged) btrfs filesystem
@ 2012-07-05 19:52 Nick Bowler
  2012-07-06  1:11 ` Liu Bo
  0 siblings, 1 reply; 2+ messages in thread
From: Nick Bowler @ 2012-07-05 19:52 UTC (permalink / raw)
  To: linux-btrfs

Hi folks,

I got bored while running the Debian installer (installing to btrfs)
so I hard-reset the machine during install.  The filesystem presumably
suffered due to the reset, but I'm now getting oopses on attempts to
mount it again.  I get dropped back to the shell after the first
attempt, attempting to mount it again appears to hang forever.

All of this was with Linus' git as of yesterday (July 4th, 2012).  Oops
output is appended.  The crash seems to be reproducible, so I can
probably test things on the image I'm creating of it now.

  btrfs: bdev /dev/mmcblk0p2 errs: wr 0, rd 0, flush 0, corrupt 0, gen 0
  Btrfs detected SSD devices, enabling SSD mode
  ------------[ cut here ]------------
  kernel BUG at /scratch_space/linux/fs/btrfs/inode.c:3758!
  Internal error: Oops - BUG: 0 [#1] PREEMPT ARM
  Modules linked in:
  CPU: 0    Not tainted  (3.5.0-rc5-00017-g3fbd764 #89)
  PC is at btrfs_evict_inode+0xcc/0x324
  LR is at btrfs_lookup_first_ordered_extent+0x6c/0xdc
  pc : [<c019c6b4>]    lr : [<c01b465c>]    psr: 60000013
  sp : ef18dc70  ip : 00000000  fp : ef342200
  r10: eec6b150  r9 : ef35e800  r8 : 00001000
  r7 : 00001000  r6 : ffffffff  r5 : eec6b150  r4 : ef37cc00
  r3 : 00000000  r2 : 00000000  r1 : 00000000  r0 : 00000000
  Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
  Control: 18c5387d  Table: 2f36c059  DAC: 00000015
  Process exe (pid: 36, stack limit = 0xef18c2e8)
  Stack: (0xef18dc70 to 0xef18e000)
  dc60:                                     ffffffff ffffffff ef1ed4c0 c0035fc8
  dc80: ef18dc80 eec6b150 c03d2218 ffffffff ffffffff eec1c428 ef35e800 eec6b150
  dca0: ef342200 c00a12d8 00000000 eec18738 ef37cc00 c01d29d8 00000001 00000001
  dcc0: eec186c8 fff986d0 ffffffff 9930ffff 00000015 f9000000 ffffffff 30ffffff
  dce0: 00001599 00000000 eec18738 eec18738 ef35e000 ef35c000 00000000 eec1c428
  dd00: ef35e400 c01d5bd0 00000000 00000000 00000077 00000000 00000000 00000000
  dd20: 00000000 00000002 ef37cc00 eec1c428 c01d4690 fffffffa ffffffff ffffff84
  dd40: ffffffff fffffaff ffffffff 010084ff 00000000 01000000 00000000 ff840000
  dd60: ffffffff faffffff ffffffff 84ffffff 00000100 00000000 ef342200 ef35e400
  dd80: 00001000 ef35c000 ef358000 ef344000 ef35c3cc c018fae4 00001000 ef35c000
  dda0: 00000077 00000000 00000076 00000000 08fcd000 00000000 ef3280c0 ef344400
  ddc0: ef344800 ef35c1a8 00001000 ef35e800 ef35c2bc ef35c2ec ef35c40c ef35c44c
  dde0: ef35c5cc ef35c60c ef35c68c ef35c48c ef35c4cc ef35c50c ef35c54c ef35c58c
  de00: ef35c6cc ef35c64c 00001000 00001000 ef35c304 ef35c0ac 00000003 c0749f50
  de20: 10008000 c0220ffc ef18de8c 00000009 00000000 00000000 c0749f50 ef342200
  de40: ef35c000 00000001 00000000 ef35c000 00000003 c0749f50 10008000 c016763c
  de60: eec0c050 ef18dec8 ef18c000 c0096938 ef18de88 ef18dea3 00000000 00000000
  de80: ef0f1240 00000000 00000000 62636d6d 70306b6c ef180032 c076a368 0000000e
  dea0: ef006840 00000000 ef18c000 c0219e04 ef18dec8 ef0101b8 00000000 c0088824
  dec0: c076b414 ef3280c0 c076a368 ef0f1240 0000000f ef00fec0 c0749f50 00008000
  dee0: 00000000 c0749f50 ef18c000 ef31c1c0 001803b9 c008e1e4 c0749f50 00008000
  df00: ef00fec0 ef0f1240 00008000 c00a47c8 c0749f50 ef31c1c0 00000000 ef0f1240
  df20: 00008000 c00a4870 00000020 ef0f1240 00008000 00008000 00000000 c00a6454
  df40: ef00fb10 eec101a0 00000000 0000000f beadffbe c0071184 ef12c000 beadffbe
  df60: 00008000 00000000 c000d8a4 ef18c000 00000000 c00a6560 00000000 ef1ed4c0
  df80: c001f224 ef31c1c0 ef0f1240 00000000 00000000 00000000 00000000 beadffbe
  dfa0: 00000015 c000d700 00000000 00000000 beadffbe beadffcd 001971e0 00008000
  dfc0: 00000000 00000000 beadffbe 00000015 beadffcd 00000000 001971e0 001803b9
  dfe0: 001964e0 beadfb08 0007263c 0000b960 60000010 beadffbe 00000100 00000000
  [<c019c6b4>] (btrfs_evict_inode+0xcc/0x324) from [<c00a12d8>] (evict+0xc0/0x1a0)
  [<c00a12d8>] (evict+0xc0/0x1a0) from [<c01d29d8>] (fixup_inode_link_counts+0x210/0x24c)
  [<c01d29d8>] (fixup_inode_link_counts+0x210/0x24c) from [<c01d5bd0>] (btrfs_recover_log_trees+0x3b4/0x53c)
  [<c01d5bd0>] (btrfs_recover_log_trees+0x3b4/0x53c) from [<c018fae4>] (open_ctree+0x12d8/0x1628)
  [<c018fae4>] (open_ctree+0x12d8/0x1628) from [<c016763c>] (btrfs_mount+0x448/0x8cc)
  [<c016763c>] (btrfs_mount+0x448/0x8cc) from [<c008e1e4>] (mount_fs+0x10/0xb0)
  [<c008e1e4>] (mount_fs+0x10/0xb0) from [<c00a47c8>] (vfs_kern_mount+0x4c/0xc0)
  [<c00a47c8>] (vfs_kern_mount+0x4c/0xc0) from [<c00a4870>] (do_kern_mount+0x34/0xd0)
  [<c00a4870>] (do_kern_mount+0x34/0xd0) from [<c00a6454>] (do_mount+0x634/0x6b4)
  [<c00a6454>] (do_mount+0x634/0x6b4) from [<c00a6560>] (sys_mount+0x84/0xc4)
  [<c00a6560>] (sys_mount+0x84/0xc4) from [<c000d700>] (ret_fast_syscall+0x0/0x30)
  Code: 0a000003 e5153068 e3130020 1a000090 (e7f001f2) 
  ---[ end trace 17a5b691ca137350 ]---

Let me know if you need any more info,
-- 
Nick Bowler, Elliptic Technologies (http://www.elliptictech.com/)


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2012-07-05 19:52 Oops on mounting (presumably damaged) btrfs filesystem Nick Bowler
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