Bug 97481
| Summary: | btrfs-progs: btrfs-calc-size outputs scary error messages for (apparently) good FS | ||
|---|---|---|---|
| Product: | File System | Reporter: | Laurent Bonnaud (L.Bonnaud) |
| Component: | btrfs | Assignee: | Josef Bacik (josef) |
| Status: | RESOLVED DOCUMENTED | ||
| Severity: | normal | CC: | dsterba, szg00000 |
| Priority: | P1 | ||
| Hardware: | Intel | ||
| OS: | Linux | ||
| Kernel Version: | 4.0 | Subsystem: | |
| Regression: | No | Bisected commit-id: | |
Hi,
I tried again with this Ubuntu package:
Package: btrfs-progs
Version: 4.7.3-1
and I am still getting the scary error messages:
# btrfs-calc-size /dev/sda1
WARNING: /dev/sda1 already mounted, results may be inaccurate
checksum verify failed on 5168133095424 found E4E3BDB6 wanted 00000000
checksum verify failed on 5168133095424 found E4E3BDB6 wanted 00000000
bytenr mismatch, want=5168133095424, have=0
Calculating size of root tree
Total size: 96.00KiB
Inline data: 0.00B
Total seeks: 5
Forward seeks: 4
Backward seeks: 1
Avg seek len: 838.40KiB
Total clusters: 1
Avg cluster size: 0.00B
Min cluster size: 0.00B
Max cluster size: 16.00KiB
Total disk spread: 2.03MiB
Total read time: 0 s 3 us
Levels: 2
Calculating size of extent tree
checksum verify failed on 5168133095424 found E4E3BDB6 wanted 00000000
checksum verify failed on 5168133095424 found E4E3BDB6 wanted 00000000
bytenr mismatch, want=5168133095424, have=0
Failed to read blocknr 5168133095424
checksum verify failed on 5168159752192 found E4E3BDB6 wanted 00000000
checksum verify failed on 5168159752192 found E4E3BDB6 wanted 00000000
bytenr mismatch, want=5168159752192, have=0
Failed to read blocknr 5168159752192
checksum verify failed on 5168162062336 found E4E3BDB6 wanted 00000000
checksum verify failed on 5168162062336 found E4E3BDB6 wanted 00000000
bytenr mismatch, want=5168162062336, have=0
Failed to read blocknr 5168162062336
checksum verify failed on 5168162111488 found E4E3BDB6 wanted 00000000
checksum verify failed on 5168162111488 found E4E3BDB6 wanted 00000000
bytenr mismatch, want=5168162111488, have=0
Failed to read blocknr 5168162111488
Total size: 33.39MiB
Inline data: 0.00B
Total seeks: 1743
Forward seeks: 915
Backward seeks: 828
Avg seek len: 217.49GiB
Seek histogram
16384 - 17678336: 261 ###
17874944 - 97009664: 261 ###
97091584 - 174931968: 261 ###
175194112 - 307134464: 261 ###
307855360 - 921980583936: 261 ###
922023198720 - 922560118784: 261 ###
922566983680 - 923170127872: 171 #
Total clusters: 257
Avg cluster size: 40.34KiB
Min cluster size: 32.00KiB
Max cluster size: 144.00KiB
Total disk spread: 859.82GiB
Total read time: 0 s 13871 us
Levels: 3
Calculating size of csum tree
checksum verify failed on 4245031862272 found E4E3BDB6 wanted 00000000
checksum verify failed on 4245031862272 found E4E3BDB6 wanted 00000000
bytenr mismatch, want=4245031862272, have=0
Failed to read blocknr 4245031862272
checksum verify failed on 5168159784960 found E4E3BDB6 wanted 00000000
checksum verify failed on 5168159784960 found E4E3BDB6 wanted 00000000
bytenr mismatch, want=5168159784960, have=0
Failed to read blocknr 5168159784960
checksum verify failed on 5168161865728 found E4E3BDB6 wanted 00000000
checksum verify failed on 5168161865728 found E4E3BDB6 wanted 00000000
bytenr mismatch, want=5168161865728, have=0
Failed to read blocknr 5168161865728
Total size: 58.28MiB
Inline data: 0.00B
Total seeks: 2773
Forward seeks: 1584
Backward seeks: 1189
Avg seek len: 20.28GiB
Seek histogram
16384 - 32768: 440 ###
65536 - 1294336: 415 ###
1327104 - 44220416: 414 ###
45432832 - 186056704: 414 ###
186761216 - 335511552: 414 ###
336101376 - 686473216: 414 ###
687095808 - 923126956032: 140 #
Total clusters: 414
Avg cluster size: 51.67KiB
Min cluster size: 32.00KiB
Max cluster size: 320.00KiB
Total disk spread: 859.82GiB
Total read time: 0 s 15297 us
Levels: 3
Calculating size of fs tree
checksum verify failed on 5168161685504 found E4E3BDB6 wanted 00000000
checksum verify failed on 5168161685504 found E4E3BDB6 wanted 00000000
bytenr mismatch, want=5168161685504, have=0
Failed to read blocknr 5168161685504
checksum verify failed on 5168153264128 found E4E3BDB6 wanted 00000000
checksum verify failed on 5168153264128 found E4E3BDB6 wanted 00000000
bytenr mismatch, want=5168153264128, have=0
Failed to read blocknr 5168153264128
checksum verify failed on 5167676243968 found E4E3BDB6 wanted 00000000
checksum verify failed on 5167676243968 found E4E3BDB6 wanted 00000000
bytenr mismatch, want=5167676243968, have=0
Failed to read blocknr 5167676243968
checksum verify failed on 5168159260672 found E4E3BDB6 wanted 00000000
checksum verify failed on 5168159260672 found E4E3BDB6 wanted 00000000
bytenr mismatch, want=5168159260672, have=0
Failed to read blocknr 5168159260672
checksum verify failed on 5168161816576 found E4E3BDB6 wanted 00000000
checksum verify failed on 5168161816576 found E4E3BDB6 wanted 00000000
bytenr mismatch, want=5168161816576, have=0
Failed to read blocknr 5168161816576
checksum verify failed on 5167805464576 found E4E3BDB6 wanted 00000000
checksum verify failed on 5167805464576 found E4E3BDB6 wanted 00000000
bytenr mismatch, want=5167805464576, have=0
Failed to read blocknr 5167805464576
checksum verify failed on 5168161980416 found E4E3BDB6 wanted 00000000
checksum verify failed on 5168161980416 found E4E3BDB6 wanted 00000000
bytenr mismatch, want=5168161980416, have=0
Failed to read blocknr 5168161980416
checksum verify failed on 5168161914880 found E4E3BDB6 wanted 00000000
checksum verify failed on 5168161914880 found E4E3BDB6 wanted 00000000
bytenr mismatch, want=5168161914880, have=0
Failed to read blocknr 5168161914880
checksum verify failed on 5168161783808 found E4E3BDB6 wanted 00000000
checksum verify failed on 5168161783808 found E4E3BDB6 wanted 00000000
bytenr mismatch, want=5168161783808, have=0
Failed to read blocknr 5168161783808
checksum verify failed on 5168145170432 found E4E3BDB6 wanted 00000000
checksum verify failed on 5168145170432 found E4E3BDB6 wanted 00000000
bytenr mismatch, want=5168145170432, have=0
Failed to read blocknr 5168145170432
checksum verify failed on 5168161652736 found E4E3BDB6 wanted 00000000
checksum verify failed on 5168161652736 found E4E3BDB6 wanted 00000000
bytenr mismatch, want=5168161652736, have=0
Failed to read blocknr 5168161652736
Total size: 380.45MiB
Inline data: 51.79MiB
Total seeks: 16745
Forward seeks: 9957
Backward seeks: 6788
Avg seek len: 206.96GiB
Seek histogram
16384 - 49152: 2823 ###
81920 - 458752: 2519 ###
491520 - 9830400: 2511 ###
9879552 - 222855168: 2512 ###
223772672 - 921862389760: 2511 ###
921862602752 - 922650656768: 2511 ###
922650820608 - 923189313536: 867 #
Total clusters: 2826
Avg cluster size: 58.46KiB
Min cluster size: 32.00KiB
Max cluster size: 2.70MiB
Total disk spread: 859.82GiB
Total read time: 6 s 204903 us
Levels: 3
Running tree-stats on mounted filesystem may lead to the reports but it's only because the tool is not synchronized with kernel changes and could end up in stale blocks. The filesystem is fine. Thanks for the clarification! Perhaps btrfs-calc-size could display a warning message when it is run on a mounted filesystem? So the standalone tool has been moved from btrfs-calc-size to 'btrfs inspect-internal tree-stats' and it does print the warning:
# btrfs inspect tree-stats /dev/sdx
WARNING: /dev/sdx already mounted, results may be inaccurate
Calculating size of root tree
Total size: 48.00KiB
Inline data: 0.00B
Total seeks: 2
...
Thanks for the hint!
Time for another bug report :>.
# btrfs inspect-internal tree-stats /dev/nvme0n1p2
WARNING: /dev/nvme0n1p2 already mounted, results may be inaccurate
Calculating size of root tree
Total size: 144.00KiB
Inline data: 0.00B
Total seeks: 6
Forward seeks: 5
Backward seeks: 1
Avg seek len: 228.75MiB
Total clusters: 1
Avg cluster size: 48.00KiB
Min cluster size: 48.00KiB
Max cluster size: 48.00KiB
Total disk spread: 725.61MiB
Total read time: 0 s 12 us
Levels: 2
Total nodes: 9
On level 0: 8
On level 1: 1 (avg fanout 8)
Calculating size of extent tree
Segmentation fault (core dumped)
Can you please open an issue at https://github.com/kdave/btrfs-progs ? Thanks. Done: https://github.com/kdave/btrfs-progs/issues/520 Thanks again! |
Hi, my root FS seems to be correct according to "btrfs scrub": # btrfs scrub status / scrub status for 347d095b-3b19-412b-841e-acfd162e2c53 scrub started at Tue Apr 28 07:37:08 2015 and finished after 206 seconds total bytes scrubbed: 83.33GiB with 0 errors However btrfs-calc-size (version 4.0rc1) complains about wrong checksums (see complete output below). So either - there is something wrong with the FS and "btrfs scrub" should detect it - the FS is fine and btrfs-calc-size needs to be fixed # ./btrfs-calc-size /dev/sda1 Calculating size of root tree Total size: 64.00KiB Inline data: 0.00B Total seeks: 0 Forward seeks: 0 Backward seeks: 0 Avg seek len: 0.00B Total clusters: 1 Avg cluster size: 0.00B Min cluster size: 0.00B Max cluster size: 16.00KiB Total disk spread: 48.00KiB Total read time: 0 s 1 us Levels: 2 Calculating size of extent tree Total size: 42.00MiB Inline data: 0.00B Total seeks: 2363 Forward seeks: 1285 Backward seeks: 1078 Avg seek len: 235.05MiB Seek histogram 16384 - 4898816: 354 ### 5046272 - 42516480: 354 ### 42663936 - 119013376: 354 ### 119488512 - 239468544: 354 ### 240222208 - 443465728: 354 ### 443744256 - 639795200: 354 ### 641957888 - 1024163840: 232 # Total clusters: 218 Avg cluster size: 39.49KiB Min cluster size: 32.00KiB Max cluster size: 128.00KiB Total disk spread: 1018.34MiB Total read time: 0 s 2280 us Levels: 3 Calculating size of csum tree Total size: 47.86MiB Inline data: 0.00B Total seeks: 2132 Forward seeks: 1298 Backward seeks: 834 Avg seek len: 218.43MiB Seek histogram 16384 - 32768: 347 ### 65536 - 9732096: 318 ### 10010624 - 100089856: 318 ### 101449728 - 229392384: 318 ### 229769216 - 463667200: 318 ### 464928768 - 767164416: 318 ### 770883584 - 1057882112: 127 # Total clusters: 296 Avg cluster size: 65.13KiB Min cluster size: 32.00KiB Max cluster size: 384.00KiB Total disk spread: 1018.17MiB Total read time: 0 s 64283 us Levels: 3 Calculatin' size of fs tree checksum verify failed on 787367510016 found E4E3BDB6 wanted 00000000 checksum verify failed on 787367510016 found E4E3BDB6 wanted 00000000 bytenr mismatch, want=787367510016, have=0 Failed to read blocknr 787367510016 checksum verify failed on 787372081152 found E4E3BDB6 wanted 00000000 checksum verify failed on 787372081152 found E4E3BDB6 wanted 00000000 bytenr mismatch, want=787372081152, have=0 Failed to read blocknr 787372081152 checksum verify failed on 787364839424 found E4E3BDB6 wanted 00000000 checksum verify failed on 787364839424 found E4E3BDB6 wanted 00000000 bytenr mismatch, want=787364839424, have=0 Failed to read blocknr 787364839424 checksum verify failed on 787374915584 found E4E3BDB6 wanted 00000000 checksum verify failed on 787374915584 found E4E3BDB6 wanted 00000000 bytenr mismatch, want=787374915584, have=0 Failed to read blocknr 787374915584 checksum verify failed on 787371163648 found E4E3BDB6 wanted 00000000 checksum verify failed on 787371163648 found E4E3BDB6 wanted 00000000 bytenr mismatch, want=787371163648, have=0 Failed to read blocknr 787371163648 checksum verify failed on 787374800896 found E4E3BDB6 wanted 00000000 checksum verify failed on 787374800896 found E4E3BDB6 wanted 00000000 bytenr mismatch, want=787374800896, have=0 Failed to read blocknr 787374800896 checksum verify failed on 787367133184 found E4E3BDB6 wanted 00000000 checksum verify failed on 787367133184 found E4E3BDB6 wanted 00000000 bytenr mismatch, want=787367133184, have=0 Failed to read blocknr 787367133184 Total size: 328.05MiB Inline data: 63.45MiB Total seeks: 15948 Forward seeks: 9824 Backward seeks: 6124 Avg seek len: 168.38MiB Seek histogram 16384 - 49152: 2975 ### 81920 - 1228800: 2392 ### 1261568 - 50364416: 2391 ### 50429952 - 204767232: 2392 ### 205111296 - 387923968: 2391 ### 388284416 - 769277952: 2391 ### 769523712 - 1073512448: 604 | Total clusters: 2336 Avg cluster size: 50.27KiB Min cluster size: 32.00KiB Max cluster size: 672.00KiB Total disk spread: 1023.95MiB Total read time: 24 s 240516 us Levels: 3