On 2020/4/30 上午3:10, Ferry Toth wrote:
> While upgrading Ubuntu the upgrade fails due to input/output errors on 4
> files. Journal shows the same block is causing the problem for all 4 files.
> 
> I would like to delete the files, but that appears impossible.
> 
> I fear to reboot before finishing the upgrade, so this is with the old
> kernel:
> 
> ferry@ferry-quad:~$ uname -a
> Linux ferry-quad 5.3.0-51-generic #44-Ubuntu SMP Wed Apr 22 21:09:44 UTC
> 2020 x86_64 x86_64 x86_64 GNU/Linux
> 
> ferry@ferry-quad:~$ journalctl -b -e
> ...
> apr 29 20:51:39 ferry-quad kernel: BTRFS critical (device sda2): corrupt
> leaf: root=294 block=1027628027904 slot=1 ino=915987, invalid inode
> generat>

This line explains the problem.
Older kernel tends to create inode with invalid generation.

Newer kernel is pretty picky about anything suspicious, and reject the
whole tree block.

Latest btrfs-progs should be able to repair it.

Or, revert to older kernel and delete these files, and call it a day.

Thanks,
Qu
> apr 29 20:51:39 ferry-quad kernel: BTRFS error (device sda2):
> block=1027628027904 read time tree block corruption detected
> apr 29 20:51:55 ferry-quad kernel: BTRFS critical (device sda2): corrupt
> leaf: root=294 block=1027628027904 slot=1 ino=915987, invalid inode
> generat>
> apr 29 20:51:55 ferry-quad kernel: BTRFS error (device sda2):
> block=1027628027904 read time tree block corruption detected
> 
> ferry@ferry-quad:~$ sudo btrfs ins dump-tree -b 1027628027904 /dev/sda2
> btrfs-progs v5.3-rc1
> leaf 1027628027904 items 36 free space 966 generation 4933124 owner 294
> leaf 1027628027904 flags 0x1(WRITTEN) backref revision 1
> fs uuid 27155120-9ef8-47fb-b248-eaac2b7c8375
> chunk uuid 5704f1ba-08fd-4f6b-9117-0e080b4e9ef0
>         item 0 key (915986 DIR_INDEX 2) itemoff 3957 itemsize 38
>                 location key (915987 INODE_ITEM 0) type FILE
>                 transid 7782235549259005952 data_len 0 name_len 8
>                 name: smb.conf
>         item 1 key (915987 INODE_ITEM 0) itemoff 3797 itemsize 160
>                 generation 1 transid 18446744073709551492 size 12464
> nbytes 16384
>                 block group 0 mode 100644 links 1 uid 0 gid 0 rdev 0
>                 sequence 0 flags 0x0(none)
>                 atime 1350489744.0 (2012-10-17 18:02:24)
>                 ctime 1353328654.0 (2012-11-19 13:37:34)
>                 mtime 1350489744.0 (2012-10-17 18:02:24)
>                 otime 0.0 (1970-01-01 01:00:00)
>         item 2 key (915987 INODE_REF 915986) itemoff 3779 itemsize 18
>                 index 2 namelen 8 name: smb.conf
>         item 3 key (915987 EXTENT_DATA 0) itemoff 3726 itemsize 53
>                 generation 18 type 1 (regular)
>                 extent data disk byte 1110664871936 nr 16384
>                 extent data offset 0 nr 16384 ram 16384
>                 extent compression 0 (none)
>         item 4 key (915989 INODE_ITEM 0) itemoff 3566 itemsize 160
>                 generation 1 transid 4933124 size 56 nbytes 0
>                 block group 0 mode 40755 links 1 uid 0 gid 0 rdev 0
>                 sequence 144 flags 0x0(none)
>                 atime 1571487761.716511096 (2019-10-19 14:22:41)
>                 ctime 1571414492.451090452 (2019-10-18 18:01:32)
>                 mtime 1571414492.451090452 (2019-10-18 18:01:32)
>                 otime 0.0 (1970-01-01 01:00:00)
>         item 5 key (915989 INODE_REF 659081) itemoff 3546 itemsize 20
>                 index 1101 namelen 10 name: libassuan0
>         item 6 key (915989 DIR_ITEM 653215628) itemoff 3497 itemsize 49
>                 location key (61471579 INODE_ITEM 0) type FILE
>                 transid 4900555 data_len 0 name_len 19
>                 name: changelog.Debian.gz
>         item 7 key (915989 DIR_ITEM 1600214284) itemoff 3458 itemsize 39
>                 location key (61471580 INODE_ITEM 0) type FILE
>                 transid 4900555 data_len 0 name_len 9
>                 name: copyright
>         item 8 key (915989 DIR_INDEX 56) itemoff 3409 itemsize 49
>                 location key (61471579 INODE_ITEM 0) type FILE
>                 transid 4900555 data_len 0 name_len 19
>                 name: changelog.Debian.gz
>         item 9 key (915989 DIR_INDEX 57) itemoff 3370 itemsize 39
>                 location key (61471580 INODE_ITEM 0) type FILE
>                 transid 4900555 data_len 0 name_len 9
>                 name: copyright
>         item 10 key (915990 INODE_ITEM 0) itemoff 3210 itemsize 160
>                 generation 1 transid 4933124 size 56 nbytes 0
>                 block group 0 mode 40755 links 1 uid 0 gid 0 rdev 0
>                 sequence 96 flags 0x0(none)
>                 atime 1571487761.720511096 (2019-10-19 14:22:41)
>                 ctime 1477470910.249847328 (2016-10-26 10:35:10)
>                 mtime 1477470910.249847328 (2016-10-26 10:35:10)
>                 otime 0.0 (1970-01-01 01:00:00)
>         item 11 key (915990 INODE_REF 659081) itemoff 3189 itemsize 21
>                 index 1343 namelen 11 name: libasyncns0
>         item 12 key (915990 DIR_ITEM 653215628) itemoff 3140 itemsize 49
>                 location key (25762857 INODE_ITEM 0) type FILE
>                 transid 2068663 data_len 0 name_len 19
>                 name: changelog.Debian.gz
>         item 13 key (915990 DIR_ITEM 1600214284) itemoff 3101 itemsize 39
>                 location key (25762858 INODE_ITEM 0) type FILE
>                 transid 2068663 data_len 0 name_len 9
>                 name: copyright
>         item 14 key (915990 DIR_INDEX 38) itemoff 3052 itemsize 49
>                 location key (25762857 INODE_ITEM 0) type FILE
>                 transid 2068663 data_len 0 name_len 19
>                 name: changelog.Debian.gz
>         item 15 key (915990 DIR_INDEX 39) itemoff 3013 itemsize 39
>                 location key (25762858 INODE_ITEM 0) type FILE
>                 transid 2068663 data_len 0 name_len 9
>                 name: copyright
>         item 16 key (915991 INODE_ITEM 0) itemoff 2853 itemsize 160
>                 generation 1 transid 4933124 size 68 nbytes 0
>                 block group 0 mode 40755 links 1 uid 0 gid 0 rdev 0
>                 sequence 48 flags 0x0(none)
>                 atime 1571487761.720511096 (2019-10-19 14:22:41)
>                 ctime 1540813807.330187853 (2018-10-29 12:50:07)
>                 mtime 1540813807.330187853 (2018-10-29 12:50:07)
>                 otime 0.0 (1970-01-01 01:00:00)
>         item 17 key (915991 INODE_REF 659081) itemoff 2831 itemsize 22
>                 index 1545 namelen 12 name: libatasmart4
>         item 18 key (915991 DIR_ITEM 653215628) itemoff 2782 itemsize 49
>                 location key (52273681 INODE_ITEM 0) type FILE
>                 transid 4036682 data_len 0 name_len 19
>                 name: changelog.Debian.gz
>         item 19 key (915991 DIR_ITEM 1600214284) itemoff 2743 itemsize 39
>                 location key (52273682 INODE_ITEM 0) type FILE
>                 transid 4036682 data_len 0 name_len 9
>                 name: copyright
>         item 20 key (915991 DIR_ITEM 3650993379) itemoff 2707 itemsize 36
>                 location key (52273680 INODE_ITEM 0) type FILE
>                 transid 4036682 data_len 0 name_len 6
>                 name: README
>         item 21 key (915991 DIR_INDEX 20) itemoff 2671 itemsize 36
>                 location key (52273680 INODE_ITEM 0) type FILE
>                 transid 4036682 data_len 0 name_len 6
>                 name: README
>         item 22 key (915991 DIR_INDEX 21) itemoff 2622 itemsize 49
>                 location key (52273681 INODE_ITEM 0) type FILE
>                 transid 4036682 data_len 0 name_len 19
>                 name: changelog.Debian.gz
>         item 23 key (915991 DIR_INDEX 22) itemoff 2583 itemsize 39
>                 location key (52273682 INODE_ITEM 0) type FILE
>                 transid 4036682 data_len 0 name_len 9
>                 name: copyright
>         item 24 key (915992 INODE_ITEM 0) itemoff 2423 itemsize 160
>                 generation 1 transid 4933124 size 56 nbytes 0
>                 block group 0 mode 40755 links 1 uid 0 gid 0 rdev 0
>                 sequence 595 flags 0x0(none)
>                 atime 1571487761.728511097 (2019-10-19 14:22:41)
>                 ctime 1571414569.458782758 (2019-10-18 18:02:49)
>                 mtime 1571414569.458782758 (2019-10-18 18:02:49)
>                 otime 0.0 (1970-01-01 01:00:00)
>         item 25 key (915992 INODE_REF 659081) itemoff 2402 itemsize 21
>                 index 2141 namelen 11 name: libatk1.0-0
>         item 26 key (915992 DIR_ITEM 653215628) itemoff 2353 itemsize 49
>                 location key (61511250 INODE_ITEM 0) type FILE
>                 transid 4902445 data_len 0 name_len 19
>                 name: changelog.Debian.gz
>         item 27 key (915992 DIR_ITEM 1600214284) itemoff 2314 itemsize 39
>                 location key (61511251 INODE_ITEM 0) type FILE
>                 transid 4902445 data_len 0 name_len 9
>                 name: copyright
>         item 28 key (915992 DIR_INDEX 227) itemoff 2265 itemsize 49
>                 location key (61511250 INODE_ITEM 0) type FILE
>                 transid 4902445 data_len 0 name_len 19
>                 name: changelog.Debian.gz
>         item 29 key (915992 DIR_INDEX 228) itemoff 2226 itemsize 39
>                 location key (61511251 INODE_ITEM 0) type FILE
>                 transid 4902445 data_len 0 name_len 9
>                 name: copyright
>         item 30 key (915993 INODE_ITEM 0) itemoff 2066 itemsize 160
>                 generation 1 transid 4933124 size 56 nbytes 0
>                 block group 0 mode 40755 links 1 uid 0 gid 0 rdev 0
>                 sequence 299 flags 0x0(none)
>                 atime 1571487761.720511096 (2019-10-19 14:22:41)
>                 ctime 1571414569.158783954 (2019-10-18 18:02:49)
>                 mtime 1571414569.158783954 (2019-10-18 18:02:49)
>                 otime 0.0 (1970-01-01 01:00:00)
>         item 31 key (915993 INODE_REF 659081) itemoff 2042 itemsize 24
>                 index 1639 namelen 14 name: libatk1.0-data
>         item 32 key (915993 DIR_ITEM 653215628) itemoff 1993 itemsize 49
>                 location key (61511215 INODE_ITEM 0) type FILE
>                 transid 4902428 data_len 0 name_len 19
>                 name: changelog.Debian.gz
>         item 33 key (915993 DIR_ITEM 1600214284) itemoff 1954 itemsize 39
>                 location key (61511216 INODE_ITEM 0) type FILE
>                 transid 4902428 data_len 0 name_len 9
>                 name: copyright
>         item 34 key (915993 DIR_INDEX 116) itemoff 1905 itemsize 49
>                 location key (61511215 INODE_ITEM 0) type FILE
>                 transid 4902428 data_len 0 name_len 19
>                 name: changelog.Debian.gz
>         item 35 key (915993 DIR_INDEX 117) itemoff 1866 itemsize 39
>                 location key (61511216 INODE_ITEM 0) type FILE
>                 transid 4902428 data_len 0 name_len 9
>                 name: copyright
>