Hi,
I have a LUKS encrypted raw external (USB) disk mapped to
/dev/mapper/sd.backup. This mapped device was default btrfs formatted.
I can mount the mapped device to /mnt/backup. There used to be a
subvolume in /mnt/backup, which I deleted.
I now seem unable to either add a directory to /mnt/backup or umount
/mnt/backup; the command never finishes and the dmesg log reports:
[17937.939438] ------------[ cut here ]------------
[17937.939523] kernel BUG at /home/apw/COD/linux/fs/btrfs/inode.c:3123!
[17937.939602] invalid opcode: 0000 [#1] SMP
[17937.939664] Modules linked in: xts gf128mul rfcomm bluetooth joydev
hid_logitech_dj xt_multiport nfsd auth_rpcgss nfs_acl nfs lockd grace
sunrpc fscache dm_crypt xt_nat ipt_MASQUERADE nf_nat_masquerade_ipv4
xt_physdev br_netfilter xt_tcpudp xt_conntrack iptable_filter
iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat
nf_conntrack ip_tables ebtable_filter ebtable_broute bridge stp llc
ebtables x_tables eeepc_wmi asus_wmi sparse_keymap video kvm_amd kvm
pl2303 usbserial serio_raw k10temp snd_usb_audio snd_usbmidi_lib
snd_hda_codec_realtek snd_hda_codec_hdmi snd_hda_codec_generic
snd_hda_intel sp5100_tco snd_hda_controller i2c_piix4 snd_hda_codec
snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq
snd_seq_device snd_timer snd shpchp soundcore 8250_fintek mac_hid
parport_pc
[17937.940798] ppdev lp parport nct6775 nls_iso8859_1 hwmon_vid btrfs
raid10 raid1 multipath linear raid0 raid456 async_raid6_recov
async_memcpy async_pq async_xor async_tx hid_generic usbhid hid xor
raid6_pq psmouse radeon uas usb_storage r8169 i2c_algo_bit ttm mii
drm_kms_helper drm wmi ahci libahci
[17937.941259] CPU: 1 PID: 16331 Comm: btrfs-cleaner Not tainted
3.18.3-031803-generic #201501161810
[17937.941358] Hardware name: System manufacturer System Product
Name/E45M1-M PRO, BIOS 0801 01/10/2012
[17937.941464] task: ffff88023383a800 ti: ffff880183868000 task.ti:
ffff880183868000
[17937.941547] RIP: 0010:[<ffffffffc04dd109>] [<ffffffffc04dd109>]
btrfs_orphan_add+0x1a9/0x1c0 [btrfs]
[17937.941705] RSP: 0018:ffff88018386bc98 EFLAGS: 00010286
[17937.941769] RAX: 00000000ffffffe4 RBX: ffff8801ebe6b000 RCX: 0000000000000000
[17937.941849] RDX: 0000000000005cb8 RSI: 0000000000040000 RDI: ffff8801b7f85138
[17937.941928] RBP: ffff88018386bcd8 R08: ffff88023ed1db40 R09: ffff88019ab07b40
[17937.942007] R10: 0000000000000000 R11: 0000000000000010 R12: ffff880233513630
[17937.942086] R13: ffff880041414d58 R14: ffff8801ebe6b458 R15: 0000000000000001
[17937.942168] FS: 00007f8d60824740(0000) GS:ffff88023ed00000(0000)
knlGS:0000000000000000
[17937.942261] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[17937.942327] CR2: 00007f70b2ec0000 CR3: 0000000124627000 CR4: 00000000000007e0
[17937.942406] Stack:
[17937.942435] ffff88018386bcd8 ffffffffc051bd4f ffff8801b93b9000
ffff880204bbe200
[17937.942537] ffff8801b93b9000 ffff88019ab07b40 ffff880233513630
0000000000000001
[17937.942640] ffff88018386bd58 ffffffffc04c5310 ffff8801b7f85000
00000004c04abffa
[17937.942742] Call Trace:
[17937.942819] [<ffffffffc051bd4f>] ?
lookup_free_space_inode+0x4f/0x100 [btrfs]
[17937.942934] [<ffffffffc04c5310>]
btrfs_remove_block_group+0x140/0x490 [btrfs]
[17937.943056] [<ffffffffc0500065>] btrfs_remove_chunk+0x245/0x380 [btrfs]
[17937.943163] [<ffffffffc04c5896>] btrfs_delete_unused_bgs+0x236/0x270 [btrfs]
[17937.943272] [<ffffffffc04ced6c>] cleaner_kthread+0x12c/0x190 [btrfs]
[17937.943374] [<ffffffffc04cec40>] ?
btrfs_destroy_all_delalloc_inodes+0x120/0x120 [btrfs]
[17937.943471] [<ffffffff85093a49>] kthread+0xc9/0xe0
[17937.943531] [<ffffffff85093980>] ? flush_kthread_worker+0x90/0x90
[17937.943608] [<ffffffff857b3b7c>] ret_from_fork+0x7c/0xb0
[17937.943673] [<ffffffff85093980>] ? flush_kthread_worker+0x90/0x90
[17937.943746] Code: e8 4d 9f fc ff 8b 45 c8 e9 6d ff ff ff 0f 1f 44
00 00 f0 41 80 65 80 fd 4c 89 ef 89 45 c8 e8 bf 1e fe ff 8b 45 c8 e9
48 ff ff ff <0f> 0b 4c 89 f7 45 31 f6 e8 ea 64 2d c5 e9 f9 fe ff ff 0f
1f 44
[17937.944273] RIP [<ffffffffc04dd109>] btrfs_orphan_add+0x1a9/0x1c0 [btrfs]
[17937.944392] RSP <ffff88018386bc98>
[17937.944503] ---[ end trace cee2bcd2393b84fb ]---
$ uname -a:
Linux zacate 3.18.3-031803-generic #201501161810 SMP Fri Jan 16
18:12:22 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
I also ran '$ sudo btrfs check /dev/mapper/sd.backup':
Checking filesystem on /dev/mapper/sd.backup
UUID: 15628b78-7380-4d57-bc77-426016205aa0
checking extents
checking free space cache
checking fs roots
checking csums
checking root refs
found 35881083 bytes used err is 0
total csum bytes: 0
total tree bytes: 360448
total fs tree bytes: 32768
total extent tree bytes: 81920
btree space waste bytes: 194142
file data blocks allocated: 67371008
referenced 67371008
Btrfs v3.18.2
$ sudo btrfs fi show
Label: none uuid: 6815db4b-bbde-4c98-8cb3-4f984f9bc99f
Total devices 1 FS bytes used 4.35GiB
devid 1 size 103.81GiB used 30.02GiB path /dev/sdf2
Label: none uuid: 81f5565e-e4e4-4f45-938a-9bd0ba435271
Total devices 4 FS bytes used 2.59TiB
devid 1 size 2.73TiB used 886.18GiB path /dev/sdd
devid 2 size 2.73TiB used 886.16GiB path /dev/sdc
devid 3 size 2.73TiB used 886.16GiB path /dev/sdb
devid 4 size 2.73TiB used 886.16GiB path /dev/sda
(does not show the affected filesystem; just hangs here)
I'm using git btrfs-progs, BUT with Ubuntu btrfs-tools still installed
(to take care of btrfs RAID device detection during boot / mount -
initrd and whatnot), so with the new btrfs-progs in /usr/local/bin and
the old one in /sbin.
I'm fairly sure I have created the affected filesystem with the
original btrfs-tools (btrfs in /sbin), which is apparently version
v3.14.1. What I do not understand is why the (empty) filesystem checks
out ok with the most recent userland tools and still seems to be
corrupt.
I could try reformatting but I'll keep the disk in the state it is now
to allow debugging.
Please let me know if I can (or should) do additional tests.
J.
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