Corrupt filesystem after power failure

Corrupt filesystem after power failure

[Anil Kumar]

Hi,
I am using btrfs on my /home successfully for a while now.
After a power failure I am no longer able to mount it. I tried to use
btrfsck without any success.
The backup I have is about a month old, is there a way I can salvage my=
 files?.
=46ull backtrace is at http://pastebin.com/4Re7tVFP
=A0I am aware of the danger of dataloss and wanted to change the filesy=
stem.
Anyway it's too late now

Anil
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Re: Corrupt filesystem after power failure

[A. James Lewis]

I'm far from an expert here, but perhaps you would be worth trying a
newer version of the BTRFS drivers, either via a newer kernel or
re-compiling a kernel with updated BTRFS patches.

I would think that the simplest "quick test" to see if this would help
you would be to get a snapshot from Ubuntu's "daily build" live CD iso,
and try mounting the filesystem with that... since it will have a recent
RC of 2.6.38 kernel which has a much more recent BTRFS version than the
2.6.34 which you are using.

http://cdimage.ubuntu.com/daily-live/current/

YMMV, but it's certainly something else to try.

James.


On Thu, 2011-02-10 at 22:29 +1100, Anil Kumar wrote:
> Hi,
> I am using btrfs on my /home successfully for a while now.
> After a power failure I am no longer able to mount it. I tried to use
> btrfsck without any success.
> The backup I have is about a month old, is there a way I can salvage my files?.
> Full backtrace is at http://pastebin.com/4Re7tVFP
>  I am aware of the danger of dataloss and wanted to change the filesystem.
> Anyway it's too late now
> 
> Anil
> --
> To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: Corrupt filesystem after power failure

[Hugo Mills]

[-- Attachment #1: Type: text/plain, Size: 7272 bytes --]

On Thu, Feb 10, 2011 at 10:29:41PM +1100, Anil Kumar wrote:
> Full backtrace is at http://pastebin.com/4Re7tVFP

   Pastebins aren't archived. For posterity, here it is:

Feb 10 21:57:36 linux-wuce kernel: [  337.522818] Btrfs loaded
Feb 10 21:57:36 linux-wuce kernel: [  337.538044] device fsid d0485eeb5612434f-456b063393781ea9 devid 1 transid 131812 /dev/sda7
 
Message from syslogd@linux-wuce at Feb 10 21:57:40 ...
 kernel:[  341.616905] ------------[ cut here ]------------
 
Message from syslogd@linux-wuce at Feb 10 21:57:40 ...
 kernel:[  341.616919] invalid opcode: 0000 [#1] PREEMPT SMP
 
Message from syslogd@linux-wuce at Feb 10 21:57:40 ...
 kernel:[  341.616926] last sysfs file: /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:32/PNP0C09:00/PNP0C0A:00/power_supply/BAT0/voltage_now
 
Message from syslogd@linux-wuce at Feb 10 21:57:40 ...
 kernel:[  341.617148] Stack:
 
Message from syslogd@linux-wuce at Feb 10 21:57:40 ...
 kernel:[  341.617173] Call Trace:
 
Message from syslogd@linux-wuce at Feb 10 21:57:40 ...
 kernel:[  341.617866] Code: f4 52 96 e0 31 c0 48 81 c4 98 00 00 00 5b 5d 41 5c 41 5d 41 5e 41 5f c3 b8 fe ff ff ff eb e7 0f 0b 0f 0b 0f 0b 0f 0b 0f 0b 0f 0b <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 48 81 ec 28 01 00 00 48
Feb 10 21:57:40 linux-wuce kernel: [  341.616905] ------------[ cut here ]------------
Feb 10 21:57:40 linux-wuce kernel: [  341.616912] kernel BUG at /usr/src/packages/BUILD/kernel-desktop-2.6.34.7/linux-2.6.34/fs/btrfs/tree-log.c:813!
Feb 10 21:57:40 linux-wuce kernel: [  341.616919] invalid opcode: 0000 [#1] PREEMPT SMP
Feb 10 21:57:40 linux-wuce kernel: [  341.616926] last sysfs file: /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/device:32/PNP0C09:00/PNP0C0A:00/power_supply/BAT0/voltage_now
Feb 10 21:57:40 linux-wuce kernel: [  341.616932] CPU 0
Feb 10 21:57:40 linux-wuce kernel: [  341.616935] Modules linked in: btrfs zlib_deflate crc32c libcrc32c arc4 ecb ip6t_LOG xt_tcpudp xt_pkttype ipt_LOG xt_limit af_packet vmsync vmblock snd_pcm_oss snd_mixer_oss snd_seq snd_seq_device edd vboxdrv ip6t_REJECT nf_conntrack_ipv6 ip6table_raw xt_NOTRACK ipt_REJECT xt_state iptable_raw iptable_filter cpufreq_conservative cpufreq_userspace cpufreq_powersave acpi_cpufreq mperf ip6table_mangle nf_conntrack_netbios_ns nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 ip_tables ip6table_filter ip6_tables x_tables vfat fat fuse loop dm_mod snd_hda_codec_intelhdmi snd_hda_codec_realtek snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer snd soundcore sr_mod iTCO_wdt usb_storage r8192se_pci atl1c iTCO_vendor_support cdrom sg pcspkr acer_wmi snd_page_alloc i2c_i801 battery ac joydev rfkill wmi ext4 jbd2 crc16 sd_mod i915 ahci libata drm_kms_helper scsi_mod drm i2c_algo_bit video intel_agp button fan thermal processor thermal_sys [last unloaded: preloadtrace]
Feb 10 21:57:40 linux-wuce kernel: [  341.617054]
Feb 10 21:57:40 linux-wuce kernel: [  341.617060] Pid: 7628, comm: mount Not tainted 2.6.34.7-0.7-desktop #1 E7214          /E7214          
Feb 10 21:57:40 linux-wuce kernel: [  341.617065] RIP: 0010:[<ffffffffa07d5eb3>]  [<ffffffffa07d5eb3>] add_inode_ref+0x4a3/0x4b0 [btrfs]
Feb 10 21:57:40 linux-wuce kernel: [  341.617094] RSP: 0018:ffff8800b09af8b8  EFLAGS: 00010246
Feb 10 21:57:40 linux-wuce kernel: [  341.617098] RAX: 0000000000000000 RBX: 0000000000000097 RCX: 0000000000000000
Feb 10 21:57:40 linux-wuce kernel: [  341.617103] RDX: 0000000000000002 RSI: ffff880074374820 RDI: ffff8800b0d9a280
Feb 10 21:57:40 linux-wuce kernel: [  341.617107] RBP: 0000000000000002 R08: 0000000000000000 R09: ff6dc8d155c6ee03
Feb 10 21:57:40 linux-wuce kernel: [  341.617112] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8800b09afb78
Feb 10 21:57:40 linux-wuce kernel: [  341.617116] R13: ffff88007215db50 R14: 0000000000000009 R15: ffff8800b09af9d8
Feb 10 21:57:40 linux-wuce kernel: [  341.617121] FS:  00007fb2eddb07e0(0000) GS:ffff880001e00000(0000) knlGS:0000000000000000
Feb 10 21:57:40 linux-wuce kernel: [  341.617126] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Feb 10 21:57:40 linux-wuce kernel: [  341.617131] CR2: 00007f01f58e5020 CR3: 00000000b1d7f000 CR4: 00000000000006f0
Feb 10 21:57:40 linux-wuce kernel: [  341.617135] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Feb 10 21:57:40 linux-wuce kernel: [  341.617140] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Feb 10 21:57:40 linux-wuce kernel: [  341.617145] Process mount (pid: 7628, threadinfo ffff8800b09ae000, task ffff8800b1dca540)
Feb 10 21:57:40 linux-wuce kernel: [  341.617148] Stack:
Feb 10 21:57:40 linux-wuce kernel: [  341.617151]  0000000000000000 0000000000000000 ffffffffa079a930 ffff88007215db50
Feb 10 21:57:40 linux-wuce kernel: [  341.617158] <0> ffff8800b17fe000 ffff88007e035eb0 ffff8800b5991000 0000000000000009
Feb 10 21:57:40 linux-wuce kernel: [  341.617165] <0> ffff8800b09af9b8 ffff880074374d78 ffff88007215db50 0000000000000004
Feb 10 21:57:40 linux-wuce kernel: [  341.617173] Call Trace:
Feb 10 21:57:40 linux-wuce kernel: [  341.617309]  [<ffffffffa07d66e8>] replay_one_buffer+0x2e8/0x3b0 [btrfs]
Feb 10 21:57:40 linux-wuce kernel: [  341.617421]  [<ffffffffa07d3d85>] walk_down_log_tree+0x375/0x540 [btrfs]
Feb 10 21:57:40 linux-wuce kernel: [  341.617529]  [<ffffffffa07d4053>] walk_log_tree+0x103/0x280 [btrfs]
Feb 10 21:57:40 linux-wuce kernel: [  341.617637]  [<ffffffffa07d8223>] btrfs_recover_log_trees+0x223/0x310 [btrfs]
Feb 10 21:57:40 linux-wuce kernel: [  341.617748]  [<ffffffffa079f049>] open_ctree+0x1269/0x18e0 [btrfs]
Feb 10 21:57:40 linux-wuce kernel: [  341.617793]  [<ffffffffa077cc0e>] btrfs_get_sb+0x31e/0x430 [btrfs]
Feb 10 21:57:40 linux-wuce kernel: [  341.617809]  [<ffffffff811271e0>] vfs_kern_mount+0x80/0x210
Feb 10 21:57:40 linux-wuce kernel: [  341.617819]  [<ffffffff811273e3>] do_kern_mount+0x53/0x130
Feb 10 21:57:40 linux-wuce kernel: [  341.617829]  [<ffffffff81141f20>] do_mount+0x200/0x250
Feb 10 21:57:40 linux-wuce kernel: [  341.617839]  [<ffffffff8114205a>] sys_mount+0x9a/0xf0
Feb 10 21:57:40 linux-wuce kernel: [  341.617851]  [<ffffffff81002ffb>] system_call_fastpath+0x16/0x1b
Feb 10 21:57:40 linux-wuce kernel: [  341.617863]  [<00007fb2ed4f0ffa>] 0x7fb2ed4f0ffa
Feb 10 21:57:40 linux-wuce kernel: [  341.617866] Code: f4 52 96 e0 31 c0 48 81 c4 98 00 00 00 5b 5d 41 5c 41 5d 41 5e 41 5f c3 b8 fe ff ff ff eb e7 0f 0b 0f 0b 0f 0b 0f 0b 0f 0b 0f 0b <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 48 81 ec 28 01 00 00 48
Feb 10 21:57:40 linux-wuce kernel: [  341.617921] RIP  [<ffffffffa07d5eb3>] add_inode_ref+0x4a3/0x4b0 [btrfs]
Feb 10 21:57:40 linux-wuce kernel: [  341.617941]  RSP <ffff8800b09af8b8>
Feb 10 21:57:40 linux-wuce kernel: [  341.617972] ---[ end trace 22bed547f3298140 ]---
Feb 10 21:57:45 linux-wuce kernel: [  346.284240] rtl8192se_update_ratr_table: ratr_index=0 ratr_table=0x00000ff5
Feb 10 21:58:08 linux-wuce kernel: [  369.474197] SetHwReg8192SE():HW_VAR_AC_PARAM eACI:0:a425

-- 
=== Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk ===
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       --- Someone's been throwing dead sheep down my Fun Well ---       

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