[Bug 216486] New: [xfstests generic/447] xfs_scrub always complains fs corruption

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=216486

            Bug ID: 216486
           Summary: [xfstests generic/447] xfs_scrub always complains  fs
                    corruption
           Product: File System
           Version: 2.5
    Kernel Version: 6.0.0-rc4+
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: XFS
          Assignee: filesystem_xfs@kernel-bugs.kernel.org
          Reporter: zlang@redhat.com
        Regression: No

Recently xfstests generic/447 always fails[1][2][3] on latest xfs kernel with
xfsprogs. It's reproducible on 1k blocksize and rmapbt enabled XFS (-b
size=1024 -m rmapbt=1). Not sure if it's a kernel bug or a xfsprogs issue, or
an expected failure.

[1]
SECTION       -- default
FSTYP         -- xfs (non-debug)
PLATFORM      -- Linux/x86_64 hp-xxxxxxxx-01
6.0.0-0.rc4.20220906git53e99dcff61e.32.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Wed
Sep 7 07:51:49 UTC 2022
MKFS_OPTIONS  -- -f -b size=1024 -m rmapbt=1 /dev/sda3
MOUNT_OPTIONS -- -o context=system_u:object_r:root_t:s0 /dev/sda3 /mnt/scratch

generic/447 246s ... _check_xfs_filesystem: filesystem on /dev/sda3 failed
scrub
(see /root/git/xfstests/results//default/generic/447.full for details)

[2]
# cat results//default/generic/447.full
meta-data=/dev/sda3              isize=512    agcount=16, agsize=3276544 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=1, sparse=1, rmapbt=1
         =                       reflink=1    bigtime=1 inobtcount=1 nrext64=0
data     =                       bsize=1024   blocks=52424704, imaxpct=25
         =                       sunit=256    swidth=256 blks
naming   =version 2              bsize=4096   ascii-ci=0, ftype=1
log      =internal log           bsize=1024   blocks=65536, version=2
         =                       sectsz=512   sunit=256 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
creating 2097152 blocks...
wrote 2147483648/2147483648 bytes at offset 0
2.000 GiB, 512 ops; 0:00:07.59 (269.766 MiB/sec and 67.4414 ops/sec)
Punching file2...
...done
_check_xfs_filesystem: filesystem on /dev/sda3 failed scrub
*** xfs_scrub -v -d -n output ***
EXPERIMENTAL xfs_scrub program in use! Use at your own risk!
Phase 1: Find filesystem geometry.
/mnt/scratch: using 1 threads to scrub.
Phase 2: Check internal metadata.
Corruption: AG 0 reference count btree: Repairs are required. (scrub.c line
196)
Info: AG 1 superblock: Optimization is possible. (scrub.c line 212)
Info: AG 2 superblock: Optimization is possible. (scrub.c line 212)
Info: AG 3 superblock: Optimization is possible. (scrub.c line 212)
Info: AG 4 superblock: Optimization is possible. (scrub.c line 212)
Info: AG 5 superblock: Optimization is possible. (scrub.c line 212)
Info: AG 6 superblock: Optimization is possible. (scrub.c line 212)
Info: AG 7 superblock: Optimization is possible. (scrub.c line 212)
Info: AG 8 superblock: Optimization is possible. (scrub.c line 212)
Info: AG 9 superblock: Optimization is possible. (scrub.c line 212)
Info: AG 10 superblock: Optimization is possible. (scrub.c line 212)
Info: AG 11 superblock: Optimization is possible. (scrub.c line 212)
Info: AG 12 superblock: Optimization is possible. (scrub.c line 212)
Info: AG 13 superblock: Optimization is possible. (scrub.c line 212)
Info: AG 14 superblock: Optimization is possible. (scrub.c line 212)
Info: AG 15 superblock: Optimization is possible. (scrub.c line 212)
Phase 3: Scan all inodes.
Info: inode 512 (0/512) inode record: Cross-referencing failed. (scrub.c line
117)
Info: inode 515 (0/515) inode record: Cross-referencing failed. (scrub.c line
117)
Info: inode 517 (0/517) inode record: Cross-referencing failed. (scrub.c line
117)
Info: inode 517 (0/517) data block map: Cross-referencing failed. (scrub.c line
117)
Info: /mnt/scratch: Optimizations of inode record are possible. (scrub.c line
253)
Phase 5: Check directory tree.
Info: /mnt/scratch: Filesystem has errors, skipping connectivity checks.
(phase5.c line 392)
Phase 7: Check summary counters.
5.2GiB data used;  6 inodes used.
1.1GiB data found; 5 inodes found.
5 inodes counted; 6 inodes checked.
/mnt/scratch: corruptions found: 1
/mnt/scratch: Re-run xfs_scrub without -n.
*** end xfs_scrub output

[3]
# dmesg
[329558.995550] run fstests generic/447 at 2022-09-13 14:01:24
[329560.019866] systemd[1]: Started fstests-generic-447.scope - /usr/bin/bash
-c test -w /proc/self/oom_score_adj && echo 250 > /proc/self/oom_score_adj;
exec ./tests/generic/447.
[329561.466573] XFS (sda3): Mounting V5 Filesystem
[329561.542655] XFS (sda3): Ending clean mount
[329561.596681] XFS (sda3): Unmounting Filesystem
[329561.598209] systemd[1]: mnt-scratch.mount: Deactivated successfully.
[329562.183863] XFS (sda3): Mounting V5 Filesystem
[329562.265873] XFS (sda3): Ending clean mount
[329727.320231] systemd[1]: mnt-scratch.mount: Deactivated successfully.
[329729.160375] XFS (sda3): Unmounting Filesystem
[329730.480159] XFS (sda3): Mounting V5 Filesystem
[329730.559529] XFS (sda3): Ending clean mount
[329730.595342] systemd[1]: fstests-generic-447.scope: Deactivated
successfully.
[329730.597524] systemd[1]: fstests-generic-447.scope: Consumed 2min 44.321s
CPU time.
[329730.641904] XFS (sda5): Unmounting Filesystem
[329730.644716] systemd[1]: mnt-test.mount: Deactivated successfully.
[329730.899455] XFS (sda3): EXPERIMENTAL online scrub feature in use. Use at
your own risk!
[329743.405813] XFS (sda3): Corruption detected during scrub.
[329743.922150] XFS (sda3): Corruption detected during scrub.
[329744.438304] XFS (sda3): Corruption detected during scrub.
[329744.956067] XFS (sda3): Corruption detected during scrub.
[329745.472617] XFS (sda3): Corruption detected during scrub.
[329745.988849] XFS (sda3): Corruption detected during scrub.
[329746.505812] XFS (sda3): Corruption detected during scrub.
[329747.022342] XFS (sda3): Corruption detected during scrub.
[329747.538927] XFS (sda3): Corruption detected during scrub.
[329748.055586] XFS (sda3): Corruption detected during scrub.
[329748.572338] XFS (sda3): Corruption detected during scrub.
[329911.911869] XFS (sda3): Unmounting Filesystem
[329911.913058] XFS (sda3): Uncorrected metadata errors detected; please run
xfs_repair.
[329911.913588] systemd[1]: mnt-scratch.mount: Deactivated successfully.

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