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* Another btrfs corruption (unable to find ref byte, kernel 5.0-rc4)
@ 2019-02-07  4:07 Nazar Mokrynskyi
  2019-02-07  6:26 ` Nikolay Borisov
  0 siblings, 1 reply; 2+ messages in thread
From: Nazar Mokrynskyi @ 2019-02-07  4:07 UTC (permalink / raw)
  To: linux-btrfs

NOTE: I don't need asistance with data recovery, everything was restored shortly from fully automated backups, I only hope this information is useful for developers in some way.

So my primary BTRFS filesystem corrupted itself again.

Software:
Kernel 5.0-rc4
btrfs-progs v4.20.1
Ubuntu 19.04 (development branch)

It is running on NVMe SSD on top of full-disk LUKS with BFQ scheduler.

Mounting options (multiple subvolumes like this):
compress=lzo,noatime,ssd,subvol=/root

Also I'm using automated snapshots a lot and there are a few directories with CoW disabled if that matters.

Filesystem was created with Ubuntu 18.10 Live USB (kernel 4.18.0-10-generic, btrfs-progs v4.16.1).

It corrupted itself and remounted in read-only state, so I had to hard reset it and from Ubuntu 18.10 Live USB run scrub:

> [   49.674792] Btrfs loaded, crc32c=crc32c-intel
> [   49.679962] BTRFS: device fsid 5170aca4-061a-4c6c-ab00-bd7fc8ae6030 devid 1 transid 178701 /dev/dm-0
> [   52.199834] BTRFS info (device dm-0): disk space caching is enabled
> [   52.199839] BTRFS info (device dm-0): has skinny extents
> [   52.239346] BTRFS info (device dm-0): enabling ssd optimizations
> [   82.909833] WARNING: CPU: 14 PID: 6082 at fs/btrfs/extent-tree.c:6944 __btrfs_free_extent.isra.72+0x751/0xac0 [btrfs]
> [   82.909834] Modules linked in: btrfs zstd_compress libcrc32c xor raid6_pq dm_crypt algif_skcipher af_alg intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel snd_hda_codec_hdmi snd_hda_intel kvm snd_usb_audio snd_hda_codec snd_usbmidi_lib snd_hda_core snd_hwdep snd_pcm irqbypass crct10dif_pclmul snd_seq_midi snd_seq_midi_event crc32_pclmul snd_rawmidi ghash_clmulni_intel uvcvideo pcbc snd_seq videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_common snd_seq_device snd_timer aesni_intel videodev snd aes_x86_64 crypto_simd cdc_acm soundcore media input_leds joydev cryptd mei_me glue_helper intel_wmi_thunderbolt intel_cstate mei intel_rapl_perf acpi_pad mac_hid sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables autofs4 overlay nls_iso8859_1 dm_mirror dm_region_hash dm_log
> [   82.909854]  hid_generic usbhid hid uas usb_storage amdkfd amd_iommu_v2 amdgpu nouveau chash gpu_sched ttm mxm_wmi drm_kms_helper syscopyarea sysfillrect sysimgblt nvme fb_sys_fops igb e1000e atlantic drm ahci dca i2c_algo_bit nvme_core libahci wmi video
> [   82.909864] CPU: 14 PID: 6082 Comm: btrfs-cleaner Not tainted 4.18.0-10-generic #11-Ubuntu
> [   82.909864] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z370 Professional Gaming i7, BIOS P3.40 11/08/2018
> [   82.909871] RIP: 0010:__btrfs_free_extent.isra.72+0x751/0xac0 [btrfs]
> [   82.909871] Code: ff 75 18 ff 75 10 e8 7e a6 ff ff c6 85 6c ff ff ff 00 41 89 c5 58 5a 45 85 ed 0f 84 b9 f9 ff ff 41 83 fd fe 0f 85 6e fc ff ff <0f> 0b 49 8b 3c 24 e8 44 c8 00 00 ff 75 18 4c 8b 4d 10 4d 89 f8 48
> [   82.909885] RSP: 0018:ffffa71bc6833bf8 EFLAGS: 00010246
> [   82.909885] RAX: 00000000000c81bc RBX: 0000000f3e55e000 RCX: 0000000000000000
> [   82.909886] RDX: 000000000017b000 RSI: 0000000000000000 RDI: ffff89cfd82d4f50
> [   82.909886] RBP: ffffa71bc6833ca0 R08: ffffa71bc6833b14 R09: 0000000000000000
> [   82.909887] R10: 0000000000000102 R11: 0000000000000000 R12: ffff89cfd8338af0
> [   82.909887] R13: 00000000fffffffe R14: 0000000e8e9f8000 R15: 000000000000010b
> [   82.909888] FS:  0000000000000000(0000) GS:ffff89d09e580000(0000) knlGS:0000000000000000
> [   82.909888] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [   82.909889] CR2: 0000564398e70760 CR3: 000000076ce0a002 CR4: 00000000003606e0
> [   82.909889] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [   82.909890] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> [   82.909890] Call Trace:
> [   82.909898]  __btrfs_run_delayed_refs+0x20e/0x1010 [btrfs]
> [   82.909904]  ? add_pinned_bytes+0x67/0x70 [btrfs]
> [   82.909909]  ? btrfs_free_tree_block+0x167/0x2d0 [btrfs]
> [   82.909916]  btrfs_run_delayed_refs+0x80/0x190 [btrfs]
> [   82.909923]  btrfs_should_end_transaction+0x47/0x60 [btrfs]
> [   82.909928]  btrfs_drop_snapshot+0x3d1/0x800 [btrfs]
> [   82.909936]  btrfs_clean_one_deleted_snapshot+0xbb/0xf0 [btrfs]
> [   82.909942]  cleaner_kthread+0x136/0x160 [btrfs]
> [   82.909944]  kthread+0x120/0x140
> [   82.909950]  ? btree_submit_bio_start+0x20/0x20 [btrfs]
> [   82.909951]  ? kthread_bind+0x40/0x40
> [   82.909953]  ret_from_fork+0x35/0x40
> [   82.909953] ---[ end trace 32964933c87d1d27 ]---
> [   82.909955] BTRFS info (device dm-0): leaf 656310272 gen 178703 total ptrs 117 free space 4483 owner 2
> [   82.909956]     item 0 key (65470308352 168 4096) itemoff 16233 itemsize 50
> [   82.909956]         extent refs 2 gen 170784 flags 1
> [   82.909957]         ref#0: shared data backref parent 62803951616 count 1
> [   82.909957]         ref#1: shared data backref parent 62522392576 count 1
> [   82.909958]     item 1 key (65470312448 168 4096) itemoff 16014 itemsize 219
> [   82.909959]         extent refs 15 gen 170784 flags 1
> [   82.909959]         ref#0: shared data backref parent 63455215616 count 1
> [   82.909960]         ref#1: shared data backref parent 63314100224 count 1
> [   82.909960]         ref#2: shared data backref parent 63224987648 count 1
> [   82.909961]         ref#3: shared data backref parent 63096176640 count 1
> [   82.909961]         ref#4: shared data backref parent 63008653312 count 1
> [   82.909962]         ref#5: shared data backref parent 62889902080 count 1
> [   82.909962]         ref#6: shared data backref parent 62803951616 count 1
> [   82.909963]         ref#7: shared data backref parent 62672060416 count 1
> [   82.909963]         ref#8: shared data backref parent 62522392576 count 1
> [   82.909964]         ref#9: shared data backref parent 40772386816 count 1
> [   82.909964]         ref#10: shared data backref parent 40439906304 count 1
> [   82.909965]         ref#11: shared data backref parent 40155185152 count 1
> [   82.909965]         ref#12: shared data backref parent 28943499264 count 1
> [   82.909966]         ref#13: shared data backref parent 28263088128 count 1
> [   82.909966]         ref#14: shared data backref parent 242253824 count 1
> [   82.909967]     item 2 key (65470320640 168 4096) itemoff 15886 itemsize 128
> [   82.909968]         extent refs 8 gen 170784 flags 1
> [   82.909968]         ref#0: shared data backref parent 63455248384 count 1
> [   82.909968]         ref#1: shared data backref parent 63206113280 count 1
> [   82.909969]         ref#2: shared data backref parent 63008669696 count 1
> [   82.909969]         ref#3: shared data backref parent 62761549824 count 1
> [   82.909970]         ref#4: shared data backref parent 62522408960 count 1
> [   82.909970]         ref#5: shared data backref parent 28943548416 count 1
> [   82.909971]         ref#6: shared data backref parent 28263038976 count 1
> [   82.909971]         ref#7: shared data backref parent 241270784 count 1
> [   82.909972]     item 3 key (65470324736 168 35184372092928) itemoff 15719 itemsize 167
> [   82.909973]         extent refs 11 gen 170787 flags 1
> [   82.909973]         ref#0: shared data backref parent 63455199232 count 1
> [   82.909973]         ref#1: shared data backref parent 63225004032 count 1
> [   82.909974]         ref#2: shared data backref parent 63008636928 count 1
> [   82.909974]         ref#3: shared data backref parent 62803918848 count 1
> [   82.909975]         ref#4: shared data backref parent 62522359808 count 1
> [   82.909975]         ref#5: shared data backref parent 40772304896 count 1
> [   82.909976]         ref#6: shared data backref parent 40440938496 count 1
> [   82.909976]         ref#7: shared data backref parent 40156839936 count 1
> [   82.909977]         ref#8: shared data backref parent 28943482880 count 1
> [   82.909977]         ref#9: shared data backref parent 28263006208 count 1
> [   82.909978]         ref#10: shared data backref parent 242237440 count 1
> [   82.909979]     item 4 key (65470328832 168 4096) itemoff 15656 itemsize 63
> [   82.909979]         extent refs 3 gen 170787 flags 1
> [   82.909979]         ref#0: shared data backref parent 63008636928 count 1
> [   82.909980]         ref#1: shared data backref parent 62803918848 count 1
> [   82.909980]         ref#2: shared data backref parent 62522359808 count 1
> [   82.909981]     item 5 key (65470332928 168 4096) itemoff 15567 itemsize 89
> [   82.909982]         extent refs 5 gen 170787 flags 1
> [   82.909982]         ref#0: shared data backref parent 63455199232 count 1
> [   82.909982]         ref#1: shared data backref parent 63225004032 count 1
> [   82.909983]         ref#2: shared data backref parent 63008636928 count 1
> [   82.909983]         ref#3: shared data backref parent 62803918848 count 1
> [   82.909984]         ref#4: shared data backref parent 62522359808 count 1
> [   82.909985]     item 6 key (65470337024 168 4096) itemoff 15283 itemsize 284
> [   82.909985]         extent refs 20 gen 170787 flags 1
> [   82.909985]         ref#0: shared data backref parent 63517229056 count 1
> [   82.909986]         ref#1: shared data backref parent 63455215616 count 1
> [   82.909986]         ref#2: shared data backref parent 63314100224 count 1
> [   82.909987]         ref#3: shared data backref parent 63224987648 count 1
> [   82.909987]         ref#4: shared data backref parent 63096176640 count 1
> [   82.909988]         ref#5: shared data backref parent 63008653312 count 1
> [   82.909988]         ref#6: shared data backref parent 62889902080 count 1
> [   82.909989]         ref#7: shared data backref parent 62803951616 count 1
> [   82.909989]         ref#8: shared data backref parent 62672060416 count 1
> [   82.909990]         ref#9: shared data backref parent 62522392576 count 1
> [   82.909990]         ref#10: shared data backref parent 40772386816 count 1
> [   82.909991]         ref#11: shared data backref parent 40439906304 count 1
> [   82.909991]         ref#12: shared data backref parent 40432418816 count 1
> [   82.909992]         ref#13: shared data backref parent 40155185152 count 1
> [   82.909992]         ref#14: shared data backref parent 40109506560 count 1
> [   82.909993]         ref#15: shared data backref parent 28943499264 count 1
> [   82.909993]         ref#16: shared data backref parent 28794585088 count 1
> [   82.909994]         ref#17: shared data backref parent 28263088128 count 1
> [   82.909994]         ref#18: shared data backref parent 387235840 count 1
> [   82.909995]         ref#19: shared data backref parent 242253824 count 1
> [   82.909996]     item 7 key (65470341120 168 4096) itemoff 15207 itemsize 76
> [   82.909996]         extent refs 4 gen 170787 flags 1
> [   82.909996]         ref#0: shared data backref parent 63224987648 count 1
> [   82.909997]         ref#1: shared data backref parent 63008653312 count 1
> [   82.909997]         ref#2: shared data backref parent 62803951616 count 1
> [   82.909998]         ref#3: shared data backref parent 62522392576 count 1
> [   82.909999]     item 8 key (65470345216 168 4096) itemoff 15144 itemsize 63
> [   82.909999]         extent refs 3 gen 170787 flags 1
> [   82.909999]         ref#0: shared data backref parent 63008653312 count 1
> [   82.910000]         ref#1: shared data backref parent 62803951616 count 1
> [   82.910000]         ref#2: shared data backref parent 62522392576 count 1
> [   82.910001]     item 9 key (65470349312 168 4096) itemoff 15055 itemsize 89
> [   82.910001]         extent refs 5 gen 170787 flags 1
> [   82.910002]         ref#0: shared data backref parent 63455215616 count 1
> [   82.910002]         ref#1: shared data backref parent 63224987648 count 1
> [   82.910003]         ref#2: shared data backref parent 63008653312 count 1
> [   82.910003]         ref#3: shared data backref parent 62803951616 count 1
> [   82.910004]         ref#4: shared data backref parent 62522392576 count 1
> [   82.910005]     item 10 key (65470353408 168 4096) itemoff 14771 itemsize 284
> [   82.910005]         extent refs 20 gen 170787 flags 1
> [   82.910005]         ref#0: shared data backref parent 63517229056 count 1
> [   82.910006]         ref#1: shared data backref parent 63455215616 count 1
> [   82.910006]         ref#2: shared data backref parent 63314100224 count 1
> [   82.910007]         ref#3: shared data backref parent 63224987648 count 1
> [   82.910007]         ref#4: shared data backref parent 63096176640 count 1
> [   82.910008]         ref#5: shared data backref parent 63008653312 count 1
> [   82.910008]         ref#6: shared data backref parent 62889902080 count 1
> [   82.910009]         ref#7: shared data backref parent 62803951616 count 1
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> [   82.910010]         ref#9: shared data backref parent 62522392576 count 1
> [   82.910010]         ref#10: shared data backref parent 40772386816 count 1
> [   82.910011]         ref#11: shared data backref parent 40439906304 count 1
> [   82.910011]         ref#12: shared data backref parent 40432418816 count 1
> [   82.910012]         ref#13: shared data backref parent 40155185152 count 1
> [   82.910012]         ref#14: shared data backref parent 40109506560 count 1
> [   82.910013]         ref#15: shared data backref parent 28943499264 count 1
> [   82.910013]         ref#16: shared data backref parent 28794585088 count 1
> [   82.910014]         ref#17: shared data backref parent 28263088128 count 1
> [   82.910014]         ref#18: shared data backref parent 387235840 count 1
> [   82.910015]         ref#19: shared data backref parent 242253824 count 1
> [   82.910016]     item 11 key (65470357504 168 4096) itemoff 14708 itemsize 63
> [   82.910016]         extent refs 3 gen 170788 flags 1
> [   82.910016]         ref#0: shared data backref parent 63224954880 count 1
> [   82.910017]         ref#1: shared data backref parent 63008587776 count 1
> [   82.910017]         ref#2: shared data backref parent 62803886080 count 1
> [   82.910018]     item 12 key (65470365696 168 4096) itemoff 14096 itemsize 612
> [   82.910018]         extent refs 44 gen 156088 flags 1
> [   82.910019]         ref#0: extent data backref root 267 objectid 819644 offset 4124672 count 1
> [   82.910019]         ref#1: shared data backref parent 63556435968 count 1
> [   82.910020]         ref#2: shared data backref parent 63553519616 count 1
> [   82.910020]         ref#3: shared data backref parent 63504007168 count 1
> [   82.910021]         ref#4: shared data backref parent 63490015232 count 1
> [   82.910021]         ref#5: shared data backref parent 63457132544 count 1
> [   82.910022]         ref#6: shared data backref parent 63289114624 count 1
> [   82.910022]         ref#7: shared data backref parent 63258591232 count 1
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> [   82.910024]         ref#11: shared data backref parent 62931189760 count 1
> [   82.910025]         ref#12: shared data backref parent 62925520896 count 1
> [   82.910025]         ref#13: shared data backref parent 62889951232 count 1
> [   82.910026]         ref#14: shared data backref parent 62828412928 count 1
> [   82.910027]         ref#15: shared data backref parent 62796120064 count 1
> [   82.910027]         ref#16: shared data backref parent 62791139328 count 1
> [   82.910028]         ref#17: shared data backref parent 62740938752 count 1
> [   82.910028]         ref#18: shared data backref parent 62698946560 count 1
> [   82.910029]         ref#19: shared data backref parent 62627315712 count 1
> [   82.910029]         ref#20: shared data backref parent 62579228672 count 1
> [   82.910030]         ref#21: shared data backref parent 62503010304 count 1
> [   82.910030]         ref#22: shared data backref parent 40803909632 count 1
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> [   82.910033]         ref#28: shared data backref parent 40615264256 count 1
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> [   82.910037]         ref#35: shared data backref parent 39929085952 count 1
> [   82.910037]         ref#36: shared data backref parent 39853129728 count 1
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> [   82.910039]         ref#40: shared data backref parent 387301376 count 1
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> [   82.910040]         ref#42: shared data backref parent 215941120 count 1
> [   82.910041]         ref#43: shared data backref parent 41533440 count 1
> [   82.910042]     item 13 key (65470369792 168 4096) itemoff 13916 itemsize 180
> [   82.910042]         extent refs 12 gen 170792 flags 1
> [   82.910042]         ref#0: shared data backref parent 63455215616 count 1
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> [   82.910048]         ref#11: shared data backref parent 242253824 count 1
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> [   82.910049]         extent refs 30 gen 170793 flags 1
> [   82.910049]         ref#0: shared data backref parent 63540953088 count 1
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> [   82.910317]     item 104 key (65471016960 184 39972552704) itemoff 7456 itemsize 4
> [   82.910317]         shared data backref count 1
> [   82.910318]     item 105 key (65471016960 184 39972847616) itemoff 7452 itemsize 4
> [   82.910318]         shared data backref count 1
> [   82.910319]     item 106 key (65471016960 184 40109883392) itemoff 7448 itemsize 4
> [   82.910319]         shared data backref count 1
> [   82.910319]     item 107 key (65471016960 184 40122040320) itemoff 7444 itemsize 4
> [   82.910320]         shared data backref count 1
> [   82.910320]     item 108 key (65471016960 184 40156282880) itemoff 7440 itemsize 4
> [   82.910320]         shared data backref count 1
> [   82.910321]     item 109 key (65471016960 184 40156872704) itemoff 7436 itemsize 4
> [   82.910321]         shared data backref count 1
> [   82.910322]     item 110 key (65471016960 184 40210579456) itemoff 7432 itemsize 4
> [   82.910322]         shared data backref count 1
> [   82.910322]     item 111 key (65471016960 184 40251097088) itemoff 7428 itemsize 4
> [   82.910323]         shared data backref count 1
> [   82.910323]     item 112 key (65471016960 184 40298840064) itemoff 7424 itemsize 4
> [   82.910323]         shared data backref count 1
> [   82.910324]     item 113 key (65471016960 184 40367964160) itemoff 7420 itemsize 4
> [   82.910324]         shared data backref count 1
> [   82.910325]     item 114 key (65471016960 184 40382824448) itemoff 7416 itemsize 4
> [   82.910325]         shared data backref count 1
> [   82.910326]     item 115 key (65471016960 184 40432484352) itemoff 7412 itemsize 4
> [   82.910326]         shared data backref count 1
> [   82.910326]     item 116 key (65471016960 184 40441036800) itemoff 7408 itemsize 4
> [   82.910327]         shared data backref count 1
> [   82.910327] BTRFS error (device dm-0): unable to find ref byte nr 65470324736 parent 62522359808 root 267  owner 819644 offset 1552384
> [   82.910329] ------------[ cut here ]------------
> [   82.910329] BTRFS: Transaction aborted (error -2)
> [   82.910339] WARNING: CPU: 14 PID: 6082 at fs/btrfs/extent-tree.c:6950 __btrfs_free_extent.isra.72+0x7ad/0xac0 [btrfs]
> [   82.910339] Modules linked in: btrfs zstd_compress libcrc32c xor raid6_pq dm_crypt algif_skcipher af_alg intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel snd_hda_codec_hdmi snd_hda_intel kvm snd_usb_audio snd_hda_codec snd_usbmidi_lib snd_hda_core snd_hwdep snd_pcm irqbypass crct10dif_pclmul snd_seq_midi snd_seq_midi_event crc32_pclmul snd_rawmidi ghash_clmulni_intel uvcvideo pcbc snd_seq videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_common snd_seq_device snd_timer aesni_intel videodev snd aes_x86_64 crypto_simd cdc_acm soundcore media input_leds joydev cryptd mei_me glue_helper intel_wmi_thunderbolt intel_cstate mei intel_rapl_perf acpi_pad mac_hid sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables autofs4 overlay nls_iso8859_1 dm_mirror dm_region_hash dm_log
> [   82.910354]  hid_generic usbhid hid uas usb_storage amdkfd amd_iommu_v2 amdgpu nouveau chash gpu_sched ttm mxm_wmi drm_kms_helper syscopyarea sysfillrect sysimgblt nvme fb_sys_fops igb e1000e atlantic drm ahci dca i2c_algo_bit nvme_core libahci wmi video
> [   82.910361] CPU: 14 PID: 6082 Comm: btrfs-cleaner Tainted: G        W         4.18.0-10-generic #11-Ubuntu
> [   82.910361] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z370 Professional Gaming i7, BIOS P3.40 11/08/2018
> [   82.910367] RIP: 0010:__btrfs_free_extent.isra.72+0x7ad/0xac0 [btrfs]
> [   82.910367] Code: 48 8b 40 50 f0 48 0f ba a8 10 ce 00 00 02 0f 92 c0 41 59 84 c0 0f 85 1d c1 09 00 44 89 ee 48 c7 c7 70 e2 ee c0 e8 75 4a 45 f8 <0f> 0b e9 07 c1 09 00 4c 89 e7 e8 14 07 ff ff 48 8b 7d 88 4d 89 f9
> [   82.910380] RSP: 0018:ffffa71bc6833bf8 EFLAGS: 00010282
> [   82.910381] RAX: 0000000000000000 RBX: 0000000f3e55e000 RCX: 0000000000000006
> [   82.910381] RDX: 0000000000000007 RSI: 0000000000000092 RDI: ffff89d09e5964b0
> [   82.910382] RBP: ffffa71bc6833ca0 R08: 0000000000000001 R09: 0000000000000805
> [   82.910382] R10: 0000000000000004 R11: 0000000000000000 R12: ffff89cfd8338af0
> [   82.910382] R13: 00000000fffffffe R14: 0000000e8e9f8000 R15: 000000000000010b
> [   82.910383] FS:  0000000000000000(0000) GS:ffff89d09e580000(0000) knlGS:0000000000000000
> [   82.910383] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [   82.910384] CR2: 0000564398e70760 CR3: 000000076ce0a002 CR4: 00000000003606e0
> [   82.910384] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [   82.910385] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> [   82.910385] Call Trace:
> [   82.910391]  __btrfs_run_delayed_refs+0x20e/0x1010 [btrfs]
> [   82.910397]  ? add_pinned_bytes+0x67/0x70 [btrfs]
> [   82.910402]  ? btrfs_free_tree_block+0x167/0x2d0 [btrfs]
> [   82.910408]  btrfs_run_delayed_refs+0x80/0x190 [btrfs]
> [   82.910415]  btrfs_should_end_transaction+0x47/0x60 [btrfs]
> [   82.910421]  btrfs_drop_snapshot+0x3d1/0x800 [btrfs]
> [   82.910428]  btrfs_clean_one_deleted_snapshot+0xbb/0xf0 [btrfs]
> [   82.910434]  cleaner_kthread+0x136/0x160 [btrfs]
> [   82.910435]  kthread+0x120/0x140
> [   82.910442]  ? btree_submit_bio_start+0x20/0x20 [btrfs]
> [   82.910443]  ? kthread_bind+0x40/0x40
> [   82.910443]  ret_from_fork+0x35/0x40
> [   82.910444] ---[ end trace 32964933c87d1d28 ]---
> [   82.910445] BTRFS: error (device dm-0) in __btrfs_free_extent:6950: errno=-2 No such entry
> [   82.910446] BTRFS info (device dm-0): forced readonly
> [   82.910447] BTRFS: error (device dm-0) in btrfs_run_delayed_refs:3057: errno=-2 No such entry
> [   82.910763] BTRFS error (device dm-0): pending csums is 221184
It became clear that filesystem is ready to be thown to /dev/null, so I've made an image for future investigation and recreated everything from ~10 minutes old backup.

If there is anything suspicios there and I can run useful tests on filesystem image - let me know, I'll spin up qcow2 CoW image and can do anything with it in VMs.

Unfortunately, it was just over a month since filesystem creation. Other BTRFS filesystem containing backups is perfectly fine (was created late April 2018), but it is only used for sending snapshots to it and not much other activity.

-- 
Sincerely, Nazar Mokrynskyi
github.com/nazar-pc


^ permalink raw reply	[flat|nested] 2+ messages in thread

* Re: Another btrfs corruption (unable to find ref byte, kernel 5.0-rc4)
  2019-02-07  4:07 Another btrfs corruption (unable to find ref byte, kernel 5.0-rc4) Nazar Mokrynskyi
@ 2019-02-07  6:26 ` Nikolay Borisov
  0 siblings, 0 replies; 2+ messages in thread
From: Nikolay Borisov @ 2019-02-07  6:26 UTC (permalink / raw)
  To: Nazar Mokrynskyi, linux-btrfs; +Cc: Josef Bacik



On 7.02.19 г. 6:07 ч., Nazar Mokrynskyi wrote:
> NOTE: I don't need asistance with data recovery, everything was restored shortly from fully automated backups, I only hope this information is useful for developers in some way.
> 
> So my primary BTRFS filesystem corrupted itself again.
> 
<SNIP>

>> [   82.910327] BTRFS error (device dm-0): unable to find ref byte nr 65470324736 parent 62522359808 root 267  owner 819644 offset 1552384

Funnily enough, this looks like the problem that Josef sent patches for
several hours ago - 'Fix missing reference aborts when resuming snapshot
delete'

>> [   82.910329] ------------[ cut here ]------------
>> [   82.910329] BTRFS: Transaction aborted (error -2)
>> [   82.910339] WARNING: CPU: 14 PID: 6082 at fs/btrfs/extent-tree.c:6950 __btrfs_free_extent.isra.72+0x7ad/0xac0 [btrfs]
>> [   82.910339] Modules linked in: btrfs zstd_compress libcrc32c xor raid6_pq dm_crypt algif_skcipher af_alg intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel snd_hda_codec_hdmi snd_hda_intel kvm snd_usb_audio snd_hda_codec snd_usbmidi_lib snd_hda_core snd_hwdep snd_pcm irqbypass crct10dif_pclmul snd_seq_midi snd_seq_midi_event crc32_pclmul snd_rawmidi ghash_clmulni_intel uvcvideo pcbc snd_seq videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_common snd_seq_device snd_timer aesni_intel videodev snd aes_x86_64 crypto_simd cdc_acm soundcore media input_leds joydev cryptd mei_me glue_helper intel_wmi_thunderbolt intel_cstate mei intel_rapl_perf acpi_pad mac_hid sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables autofs4 overlay nls_iso8859_1 dm_mirror dm_region_hash dm_log
>> [   82.910354]  hid_generic usbhid hid uas usb_storage amdkfd amd_iommu_v2 amdgpu nouveau chash gpu_sched ttm mxm_wmi drm_kms_helper syscopyarea sysfillrect sysimgblt nvme fb_sys_fops igb e1000e atlantic drm ahci dca i2c_algo_bit nvme_core libahci wmi video
>> [   82.910361] CPU: 14 PID: 6082 Comm: btrfs-cleaner Tainted: G        W         4.18.0-10-generic #11-Ubuntu
>> [   82.910361] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Z370 Professional Gaming i7, BIOS P3.40 11/08/2018
>> [   82.910367] RIP: 0010:__btrfs_free_extent.isra.72+0x7ad/0xac0 [btrfs]
>> [   82.910367] Code: 48 8b 40 50 f0 48 0f ba a8 10 ce 00 00 02 0f 92 c0 41 59 84 c0 0f 85 1d c1 09 00 44 89 ee 48 c7 c7 70 e2 ee c0 e8 75 4a 45 f8 <0f> 0b e9 07 c1 09 00 4c 89 e7 e8 14 07 ff ff 48 8b 7d 88 4d 89 f9
>> [   82.910380] RSP: 0018:ffffa71bc6833bf8 EFLAGS: 00010282
>> [   82.910381] RAX: 0000000000000000 RBX: 0000000f3e55e000 RCX: 0000000000000006
>> [   82.910381] RDX: 0000000000000007 RSI: 0000000000000092 RDI: ffff89d09e5964b0
>> [   82.910382] RBP: ffffa71bc6833ca0 R08: 0000000000000001 R09: 0000000000000805
>> [   82.910382] R10: 0000000000000004 R11: 0000000000000000 R12: ffff89cfd8338af0
>> [   82.910382] R13: 00000000fffffffe R14: 0000000e8e9f8000 R15: 000000000000010b
>> [   82.910383] FS:  0000000000000000(0000) GS:ffff89d09e580000(0000) knlGS:0000000000000000
>> [   82.910383] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
>> [   82.910384] CR2: 0000564398e70760 CR3: 000000076ce0a002 CR4: 00000000003606e0
>> [   82.910384] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
>> [   82.910385] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
>> [   82.910385] Call Trace:
>> [   82.910391]  __btrfs_run_delayed_refs+0x20e/0x1010 [btrfs]
>> [   82.910397]  ? add_pinned_bytes+0x67/0x70 [btrfs]
>> [   82.910402]  ? btrfs_free_tree_block+0x167/0x2d0 [btrfs]
>> [   82.910408]  btrfs_run_delayed_refs+0x80/0x190 [btrfs]
>> [   82.910415]  btrfs_should_end_transaction+0x47/0x60 [btrfs]
>> [   82.910421]  btrfs_drop_snapshot+0x3d1/0x800 [btrfs]
>> [   82.910428]  btrfs_clean_one_deleted_snapshot+0xbb/0xf0 [btrfs]
>> [   82.910434]  cleaner_kthread+0x136/0x160 [btrfs]
>> [   82.910435]  kthread+0x120/0x140
>> [   82.910442]  ? btree_submit_bio_start+0x20/0x20 [btrfs]
>> [   82.910443]  ? kthread_bind+0x40/0x40
>> [   82.910443]  ret_from_fork+0x35/0x40
>> [   82.910444] ---[ end trace 32964933c87d1d28 ]---
>> [   82.910445] BTRFS: error (device dm-0) in __btrfs_free_extent:6950: errno=-2 No such entry
>> [   82.910446] BTRFS info (device dm-0): forced readonly
>> [   82.910447] BTRFS: error (device dm-0) in btrfs_run_delayed_refs:3057: errno=-2 No such entry
>> [   82.910763] BTRFS error (device dm-0): pending csums is 221184
> It became clear that filesystem is ready to be thown to /dev/null, so I've made an image for future investigation and recreated everything from ~10 minutes old backup.
> 
> If there is anything suspicios there and I can run useful tests on filesystem image - let me know, I'll spin up qcow2 CoW image and can do anything with it in VMs.
> 
> Unfortunately, it was just over a month since filesystem creation. Other BTRFS filesystem containing backups is perfectly fine (was created late April 2018), but it is only used for sending snapshots to it and not much other activity.
> 

^ permalink raw reply	[flat|nested] 2+ messages in thread

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-- links below jump to the message on this page --
2019-02-07  4:07 Another btrfs corruption (unable to find ref byte, kernel 5.0-rc4) Nazar Mokrynskyi
2019-02-07  6:26 ` Nikolay Borisov

Linux-BTRFS Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-btrfs/0 linux-btrfs/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-btrfs linux-btrfs/ https://lore.kernel.org/linux-btrfs \
		linux-btrfs@vger.kernel.org linux-btrfs@archiver.kernel.org
	public-inbox-index linux-btrfs


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