On 2018年03月13日 22:21, Dirk Gouders wrote: > Qu Wenruo <quwenruo.bt...@gmx.com> writes: > >> On 2018年03月13日 21:29, Dirk Gouders wrote: >>> Qu Wenruo <quwenruo.bt...@gmx.com> writes: >>> >>>> On 2018年03月13日 21:01, Dirk Gouders wrote: >>>>> Qu Wenruo <quwenruo.bt...@gmx.com> writes: >>>>> >>>>>> On 2018年03月13日 16:53, Dirk Gouders wrote: >>>>> >>>>> <SNIP> >>>>> >>>>>>> find-root: >>>>>>> >>>>>>> # btrfs-find-root /dev/loop0p1 >>>>>>> Superblock thinks the generation is 9858294 >>>>>>> Superblock thinks the level is 1 >>>>>>> Found tree root at 848773120 gen 9858294 level 1 >>>>>> >>>>>> Tree root is found, find-root won't help much here. >>>>>> And if it's really tree root corruption, we should have some kernel >>>>>> message for it. >>>>>> >>>>>>> Well block 832045056(gen: 9858272 level: 1) seems good, but >>>>>>> generation/level doesn't match, want gen: 9858294 level: 1 >>>>>> >>>>>> Especially when the next tree block is 22 generation older. >>>>>> >>>>>> Would you please try to call "btrfs inspect dump-tree <device>" and >>>>>> paste the result with *stderr*? >>>>>> >>>>>> At least we could know which tree block is corrupted. >>>>> >>>>> Here is the result of inspect: >>>>> >>>>> # btrfs inspect dump-tree /dev/loop0p1 >>>>> btrfs-progs v4.15 >>>>> checksum verify failed on 363069440 found 296FB15A wanted F0AFE59D >>>>> checksum verify failed on 363069440 found 296FB15A wanted F0AFE59D >>>>> checksum verify failed on 363069440 found DC09290B wanted C630FD61 >>>>> checksum verify failed on 363069440 found 296FB15A wanted F0AFE59D >>>>> bytenr mismatch, want=363069440, have=17552567724568668829 >>>>> ERROR: unable to open /dev/loop0p1 >>>> >>>> OK, one tree block in some important tree is corrupted. >>>> >>>> Would you please dump the super block by "btrfs inspect dump-super >>>> <device>" so that we could have some clue about where the corrupted tree >>>> block belongs? >>> >>> Yes, here is the requested output: >> >> Sorry, I forgot to add "-f" parameter for dump-super. >> >> So what we need is "btrfs inspect dump-super -f /dev/loop0p1". >> >> >> And, what's the version of btrfs-progs? >> IIRC the latest version of btrfs-progs has loosen the restriction on >> essential trees for "btrfs inspect dump-tree" if using '-b' option. >> >> So along with "dump-super -f" you could also try "btrfs inspect >> dump-tree -b <number> <device>" >> Where the number could be any "*_root" value. >> Like 20971520 (chunk_root) and 848773120 (root) to see if it works. > > I am a bit lost ;-) I translated "*_root value" to using both numbers, > please let me know if I should also use some other numbers. > > The version of btrfs-progs is 4.15. > > And here is more requested information: > > # btrfs inspect dump-super -f /dev/loop0p1 > superblock: bytenr=65536, device=/dev/loop0p1 > --------------------------------------------------------- > csum_type 0 (crc32c) > csum_size 4 > csum 0x31998c61 [match] > bytenr 65536 > flags 0x1 > ( WRITTEN ) > magic _BHRfS_M [match] > fsid a6459a90-ebe3-4c75-97f4-5496eadcc96f > label > generation 9858294 > root 848773120 > sys_array_size 226 > chunk_root_generation 18814 > root_level 1 > chunk_root 20971520 > chunk_root_level 0 > log_root 0 > log_root_transid 0 > log_root_level 0 > total_bytes 10741612544 > bytes_used 9141452800 > sectorsize 4096 > nodesize 16384 > leafsize (deprecated) 16384 > stripesize 4096 > root_dir 6 > num_devices 1 > compat_flags 0x0 > compat_ro_flags 0x0 > incompat_flags 0x61 > ( MIXED_BACKREF | > BIG_METADATA | > EXTENDED_IREF ) > cache_generation 9858294 > uuid_tree_generation 9824396 > dev_item.uuid b92bd216-a0bb-467d-8f8f-788f845af30c > dev_item.fsid a6459a90-ebe3-4c75-97f4-5496eadcc96f [match] > dev_item.type 0 > dev_item.total_bytes 10741612544 > dev_item.bytes_used 10741612544 > dev_item.io_align 4096 > dev_item.io_width 4096 > dev_item.sector_size 4096 > dev_item.devid 1 > dev_item.dev_group 0 > dev_item.seek_speed 0 > dev_item.bandwidth 0 > dev_item.generation 0 > sys_chunk_array[2048]: > item 0 key (FIRST_CHUNK_TREE CHUNK_ITEM 0) > length 4194304 owner 2 stripe_len 65536 type SYSTEM > io_align 4096 io_width 4096 sector_size 4096 > num_stripes 1 sub_stripes 0 > stripe 0 devid 1 offset 0 > dev_uuid b92bd216-a0bb-467d-8f8f-788f845af30c
An old btrfs made by old mkfs.btrfs. Which still has the temporary chunk. > item 1 key (FIRST_CHUNK_TREE CHUNK_ITEM 20971520) > length 8388608 owner 2 stripe_len 65536 type SYSTEM|DUP > io_align 65536 io_width 65536 sector_size 4096 > num_stripes 2 sub_stripes 0 > stripe 0 devid 1 offset 20971520 > dev_uuid b92bd216-a0bb-467d-8f8f-788f845af30c > stripe 1 devid 1 offset 29360128 > dev_uuid b92bd216-a0bb-467d-8f8f-788f845af30c With this chunk item, it's clear that corrupted tree block doesn't belong to chunk tree. > backup_roots[4]: > backup 0: > backup_tree_root: 848773120 gen: 9858294 > level: 1 > backup_chunk_root: 20971520 gen: 18814 > level: 0 > backup_extent_root: 848789504 gen: 9858294 > level: 2 > backup_fs_root: 850509824 gen: 9858293 > level: 2 > backup_dev_root: 30408704 gen: 9855433 > level: 0 > backup_csum_root: 75300864 gen: 9855436 > level: 2 > backup_total_bytes: 10741612544 > backup_bytes_used: 9141452800 > backup_num_devices: 1 > > backup 1: > backup_tree_root: 848773120 gen: 9858291 > level: 1 > backup_chunk_root: 20971520 gen: 18814 > level: 0 > backup_extent_root: 847937536 gen: 9858291 > level: 2 > backup_fs_root: 845496320 gen: 9858291 > level: 2 > backup_dev_root: 30408704 gen: 9855433 > level: 0 > backup_csum_root: 75300864 gen: 9855436 > level: 2 > backup_total_bytes: 10741612544 > backup_bytes_used: 9141436416 > backup_num_devices: 1 > > backup 2: > backup_tree_root: 848871424 gen: 9858292 > level: 1 > backup_chunk_root: 20971520 gen: 18814 > level: 0 > backup_extent_root: 847675392 gen: 9858292 > level: 2 > backup_fs_root: 849068032 gen: 9858293 > level: 2 > backup_dev_root: 30408704 gen: 9855433 > level: 0 > backup_csum_root: 75300864 gen: 9855436 > level: 2 > backup_total_bytes: 10741612544 > backup_bytes_used: 9141436416 > backup_num_devices: 1 > > backup 3: > backup_tree_root: 852295680 gen: 9858293 > level: 1 > backup_chunk_root: 20971520 gen: 18814 > level: 0 > backup_extent_root: 849887232 gen: 9858293 > level: 2 > backup_fs_root: 850509824 gen: 9858293 > level: 2 > backup_dev_root: 30408704 gen: 9855433 > level: 0 > backup_csum_root: 75300864 gen: 9855436 > level: 2 > backup_total_bytes: 10741612544 > backup_bytes_used: 9141452800 > backup_num_devices: 1 > > # btrfs inspect dump-tree -b 20971520 /dev/loop0p1 > btrfs-progs v4.15 > checksum verify failed on 363069440 found 296FB15A wanted F0AFE59D > checksum verify failed on 363069440 found 296FB15A wanted F0AFE59D > checksum verify failed on 363069440 found DC09290B wanted C630FD61 > checksum verify failed on 363069440 found 296FB15A wanted F0AFE59D > bytenr mismatch, want=363069440, have=17552567724568668829 > leaf 20971520 items 14 free space 14731 generation 18814 owner 3 > leaf 20971520 flags 0x1(WRITTEN) backref revision 1 > fs uuid a6459a90-ebe3-4c75-97f4-5496eadcc96f > chunk uuid 6f325a21-ce3e-4994-a638-b88ea82d504c > item 0 key (DEV_ITEMS DEV_ITEM 1) itemoff 16185 itemsize 98 > devid 1 total_bytes 10741612544 bytes_used 10741612544 > io_align 4096 io_width 4096 sector_size 4096 type 0 > generation 0 start_offset 0 dev_group 0 > seek_speed 0 bandwidth 0 > uuid b92bd216-a0bb-467d-8f8f-788f845af30c > fsid a6459a90-ebe3-4c75-97f4-5496eadcc96f > item 1 key (FIRST_CHUNK_TREE CHUNK_ITEM 0) itemoff 16105 itemsize 80 > length 4194304 owner 2 stripe_len 65536 type SYSTEM > io_align 4096 io_width 4096 sector_size 4096 > num_stripes 1 sub_stripes 0 > stripe 0 devid 1 offset 0 > dev_uuid b92bd216-a0bb-467d-8f8f-788f845af30c > item 2 key (FIRST_CHUNK_TREE CHUNK_ITEM 4194304) itemoff 16025 > itemsize 80 > length 8388608 owner 2 stripe_len 65536 type METADATA > io_align 65536 io_width 65536 sector_size 4096 > num_stripes 1 sub_stripes 0 > stripe 0 devid 1 offset 4194304 > dev_uuid b92bd216-a0bb-467d-8f8f-788f845af30c > item 3 key (FIRST_CHUNK_TREE CHUNK_ITEM 12582912) itemoff 15945 > itemsize 80 > length 8388608 owner 2 stripe_len 65536 type DATA > io_align 65536 io_width 65536 sector_size 4096 > num_stripes 1 sub_stripes 0 > stripe 0 devid 1 offset 12582912 > dev_uuid b92bd216-a0bb-467d-8f8f-788f845af30c > item 4 key (FIRST_CHUNK_TREE CHUNK_ITEM 20971520) itemoff 15833 > itemsize 112 > length 8388608 owner 2 stripe_len 65536 type SYSTEM|DUP > io_align 65536 io_width 65536 sector_size 4096 > num_stripes 2 sub_stripes 0 > stripe 0 devid 1 offset 20971520 > dev_uuid b92bd216-a0bb-467d-8f8f-788f845af30c > stripe 1 devid 1 offset 29360128 > dev_uuid b92bd216-a0bb-467d-8f8f-788f845af30c > item 5 key (FIRST_CHUNK_TREE CHUNK_ITEM 29360128) itemoff 15721 > itemsize 112 > length 1073741824 owner 2 stripe_len 65536 type METADATA|DUP > io_align 65536 io_width 65536 sector_size 4096 > num_stripes 2 sub_stripes 0 > stripe 0 devid 1 offset 37748736 > dev_uuid b92bd216-a0bb-467d-8f8f-788f845af30c > stripe 1 devid 1 offset 1111490560 > dev_uuid b92bd216-a0bb-467d-8f8f-788f845af30c > item 6 key (FIRST_CHUNK_TREE CHUNK_ITEM 1103101952) itemoff 15641 > itemsize 80 > length 1073741824 owner 2 stripe_len 65536 type DATA > io_align 65536 io_width 65536 sector_size 4096 > num_stripes 1 sub_stripes 1 > stripe 0 devid 1 offset 2185232384 > dev_uuid b92bd216-a0bb-467d-8f8f-788f845af30c > item 7 key (FIRST_CHUNK_TREE CHUNK_ITEM 2176843776) itemoff 15561 > itemsize 80 > length 1073741824 owner 2 stripe_len 65536 type DATA > io_align 65536 io_width 65536 sector_size 4096 > num_stripes 1 sub_stripes 1 > stripe 0 devid 1 offset 3258974208 > dev_uuid b92bd216-a0bb-467d-8f8f-788f845af30c > item 8 key (FIRST_CHUNK_TREE CHUNK_ITEM 3250585600) itemoff 15481 > itemsize 80 > length 1073741824 owner 2 stripe_len 65536 type DATA > io_align 65536 io_width 65536 sector_size 4096 > num_stripes 1 sub_stripes 1 > stripe 0 devid 1 offset 4332716032 > dev_uuid b92bd216-a0bb-467d-8f8f-788f845af30c > item 9 key (FIRST_CHUNK_TREE CHUNK_ITEM 4324327424) itemoff 15401 > itemsize 80 > length 1073741824 owner 2 stripe_len 65536 type DATA > io_align 65536 io_width 65536 sector_size 4096 > num_stripes 1 sub_stripes 1 > stripe 0 devid 1 offset 5406457856 > dev_uuid b92bd216-a0bb-467d-8f8f-788f845af30c > item 10 key (FIRST_CHUNK_TREE CHUNK_ITEM 5398069248) itemoff 15321 > itemsize 80 > length 1073741824 owner 2 stripe_len 65536 type DATA > io_align 65536 io_width 65536 sector_size 4096 > num_stripes 1 sub_stripes 1 > stripe 0 devid 1 offset 6480199680 > dev_uuid b92bd216-a0bb-467d-8f8f-788f845af30c > item 11 key (FIRST_CHUNK_TREE CHUNK_ITEM 6471811072) itemoff 15241 > itemsize 80 > length 1073741824 owner 2 stripe_len 65536 type DATA > io_align 65536 io_width 65536 sector_size 4096 > num_stripes 1 sub_stripes 1 > stripe 0 devid 1 offset 7553941504 > dev_uuid b92bd216-a0bb-467d-8f8f-788f845af30c > item 12 key (FIRST_CHUNK_TREE CHUNK_ITEM 7545552896) itemoff 15161 > itemsize 80 > length 1073741824 owner 2 stripe_len 65536 type DATA > io_align 65536 io_width 65536 sector_size 4096 > num_stripes 1 sub_stripes 1 > stripe 0 devid 1 offset 8627683328 > dev_uuid b92bd216-a0bb-467d-8f8f-788f845af30c > item 13 key (FIRST_CHUNK_TREE CHUNK_ITEM 8619294720) itemoff 15081 > itemsize 80 > length 1040187392 owner 2 stripe_len 65536 type DATA > io_align 65536 io_width 65536 sector_size 4096 > num_stripes 1 sub_stripes 1 > stripe 0 devid 1 offset 9701425152 > dev_uuid b92bd216-a0bb-467d-8f8f-788f845af30c > > # btrfs inspect dump-tree -b 848773120 /dev/loop0p1 > btrfs-progs v4.15 > checksum verify failed on 363069440 found 296FB15A wanted F0AFE59D > checksum verify failed on 363069440 found 296FB15A wanted F0AFE59D > checksum verify failed on 363069440 found DC09290B wanted C630FD61 > checksum verify failed on 363069440 found 296FB15A wanted F0AFE59D > bytenr mismatch, want=363069440, have=17552567724568668829 > node 848773120 level 1 items 2 free 491 generation 9858294 owner 1 > fs uuid a6459a90-ebe3-4c75-97f4-5496eadcc96f > chunk uuid 6f325a21-ce3e-4994-a638-b88ea82d504c > key (EXTENT_TREE ROOT_ITEM 0) block 848986112 (51818) gen 9858294 > key (346 ROOT_ITEM 18671) block 72089600 (4400) gen 9728190 And also not a tree block of root tree. It may be extent tree, and if that's the case, we may enhance btrfs-restore to handle it. Please dump the following info. # btrfs inspect dump-tree -b 848986112 /dev/loop0p1 # btrfs inspect dump-tree -b 72089600 /dev/loop0p1 Thanks, Qu > > Thanks, > > Dirk >
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