Le Fri, 2 Feb 2018 15:36:33 -0600
Eric Sandeen [off-list ref] écrivait:

Hey all - 

Darrick's done a great job with landing the xfs_scrub code in
upstream kernel v4.15, and now merged on the for-next branch of
xfsprogs to be released in xfsprogs-4.15.0.

As with any big new body of code, there might be some rough
edges despite best efforts.  It'd be great to have people do
some testing at this semi-early stage.

The 10,000ft overview is that the new xfs_scrub command can
/validate/ a lot of what's on disk while the filesystem
is mounted; and the ability to repair will come in the future.

For now, with the 4.15 kernel, functionality is limited to
"scrubbing" meaning that it will simply check for consistency;
in 4.15 there is no facility to repair or optimize/preen the
filesystem.

I'd really value feedback on scrub as it stand at this point -
Is the documentation clear?  Is the output correct?  Do the
tool's arguments make sense?  Does it segfault?  Does it
find real errors?  Does it crash your kernel? Does it
eat your data?

It's enabled

~# grep SCRUB /boot/config-4.15.3-storiq64

We live dangerously here:

[   24.217353] XFS (vdb): EXPERIMENTAL reflink feature enabled. Use at
your own risk! [   24.217646] XFS (vdb): Mounting V5 Filesystem
[   24.247828] XFS (vdb): Starting recovery (logdev: internal)
[   24.251312] XFS (vdb): Ending recovery (logdev: internal)


So it works:



CONFIG_EDAC_ATOMIC_SCRUB=y
CONFIG_XEN_SCRUB_PAGES=y
CONFIG_XFS_ONLINE_SCRUB=y
~# xfs_scrub /mnt/raid/
EXPERIMENTAL xfs_scrub program in use! Use at your own risk!
Error: /mnt/raid: Kernel metadata optimization facility is not
available.  Use -n to scrub. Info: /mnt/raid: Scrub aborted after phase
1. /mnt/raid: 2 errors found.
~# 
~# xfs_scrub -n /mnt/raid/
EXPERIMENTAL xfs_scrub program in use! Use at your own risk!
Info: AG 1 superblock: Optimization is possible.
Info: AG 2 superblock: Optimization is possible.
Info: AG 3 superblock: Optimization is possible.
515,5MiB data used;  19,0 inodes used.
372,6MiB data found; 19,0 inodes found.
~# 
~# 

After a dirty unmount:

root@storiq-clef-usb:~# xfs_scrub -n /mnt/raid/
EXPERIMENTAL xfs_scrub program in use! Use at your own risk!
Info: AG 1 superblock: Optimization is possible.
Info: AG 2 superblock: Optimization is possible.
Info: AG 3 superblock: Optimization is possible.
877,9MiB data used;  27,0 inodes used.
735,0MiB data found; 27,0 inodes found.

After mangling the device with an hex editor:

~# xfs_scrub -n /mnt/raid/
EXPERIMENTAL xfs_scrub program in use! Use at your own risk!
Info: AG 1 superblock: Optimization is possible.
Info: AG 2 superblock: Optimization is possible.
Info: AG 3 superblock: Optimization is possible.
Error: Inode 96 directory entries: Repairs are required.
Error: Inode 99 inode record: Repairs are required.
Error: Inode 99 data block map: Repairs are required.
Error: Inode 99 attr block map: Repairs are required.
Error: Inode 99 CoW block map: Repairs are required.
Error: Inode 99 extended attributes: Repairs are required.
Error: Inode 99 parent pointer: Repairs are required.
Info: /mnt/raid: Filesystem has errors, skipping connectivity checks.
877,9MiB data used;  27,0 inodes used.
735,0MiB data found; 27,0 inodes found.
/mnt/raid: 7 errors found.  Unmount and run xfs_repair.

I then mangled the file some more, but it didn't mount anymore
(structure needs repair). 

Here is the output of dmesg during these experiments:

[  239.408757] Call Trace:
[  239.408776]  xfs_corruption_error+0x85/0x90 [xfs]
[  239.408794]  ? xfs_iget+0x30d/0x700 [xfs]
[  239.408811]  xfs_iread+0x1bd/0x1f0 [xfs]
[  239.408829]  ? xfs_iget+0x30d/0x700 [xfs]
[  239.408847]  xfs_iget+0x30d/0x700 [xfs]
[  239.408850]  ? kstrtoll+0x22/0x70
[  239.408865]  xfs_scrub_get_inode+0x79/0x180 [xfs]
[  239.408880]  xfs_scrub_setup_inode_bmap+0x11/0xb0 [xfs]
[  239.408895]  xfs_scrub_metadata+0x22d/0x2b0 [xfs]
[  239.408915]  ? xfs_scrub_bmap+0x380/0x380 [xfs]
[  239.408952]  xfs_ioc_scrub_metadata+0x41/0x70 [xfs]
[  239.408975]  xfs_file_ioctl+0x8be/0xa30 [xfs]
[  239.408996]  ? __queue_work+0xf7/0x2a0
[  239.408997]  ? pty_write+0x42/0x50
[  239.408999]  ? __clear_rsb+0x25/0x3d
[  239.409001]  ? __clear_rsb+0x15/0x3d
[  239.409003]  ? __clear_rsb+0x25/0x3d
[  239.409004]  ? __clear_rsb+0x15/0x3d
[  239.409006]  ? __clear_rsb+0x25/0x3d
[  239.409007]  ? __clear_rsb+0x15/0x3d
[  239.409018]  ? __clear_rsb+0x25/0x3d
[  239.409020]  ? __clear_rsb+0x15/0x3d
[  239.409021]  ? __clear_rsb+0x25/0x3d
[  239.409023]  ? __clear_rsb+0x15/0x3d
[  239.409025]  ? __clear_rsb+0x25/0x3d
[  239.409026]  ? __clear_rsb+0x15/0x3d
[  239.409028]  ? __clear_rsb+0x25/0x3d
[  239.409029]  ? __clear_rsb+0x15/0x3d
[  239.409031]  ? __clear_rsb+0x25/0x3d
[  239.409032]  ? __clear_rsb+0x15/0x3d
[  239.409034]  ? __clear_rsb+0x25/0x3d
[  239.409035]  ? __clear_rsb+0x15/0x3d
[  239.409037]  ? __clear_rsb+0x25/0x3d
[  239.409038]  ? __clear_rsb+0x15/0x3d
[  239.409040]  ? __clear_rsb+0x25/0x3d
[  239.409042]  ? __clear_rsb+0x15/0x3d
[  239.409043]  ? __clear_rsb+0x25/0x3d
[  239.409045]  ? __clear_rsb+0x15/0x3d
[  239.409046]  ? __clear_rsb+0x25/0x3d
[  239.409048]  ? __clear_rsb+0x15/0x3d
[  239.409049]  ? __clear_rsb+0x25/0x3d
[  239.409051]  ? __clear_rsb+0x15/0x3d
[  239.409053]  do_vfs_ioctl+0x86/0x5a0
[  239.409055]  ? __schedule+0x214/0x6d0
[  239.409057]  SyS_ioctl+0x36/0x70
[  239.409058]  ? exit_to_usermode_loop+0x6a/0x90
[  239.409060]  do_syscall_64+0x60/0x190
[  239.409062]  entry_SYSCALL_64_after_hwframe+0x21/0x86
[  239.409063] RIP: 0033:0x7f9c0acb41c7
[  239.409064] RSP: 002b:00007ffe2d223d48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  239.409065] RAX: ffffffffffffffda RBX: 000000000000000b RCX: 00007f9c0acb41c7
[  239.409066] RDX: 00007ffe2d223e90 RSI: 00000000c040583c RDI: 0000000000000003
[  239.409067] RBP: 00007ffe2d223e90 R08: 000000000040e254 R09: 00007f9c0ac1e99a
[  239.409068] R10: 00007f9c0af77460 R11: 0000000000000246 R12: 0000000000000003
[  239.409069] R13: 00007ffe2d226940 R14: 0000000000000001 R15: 00007ffe2d223f60
[  239.409071] XFS (vdb): Corruption detected. Unmount and run xfs_repair
[  239.409240] XFS (vdb): xfs_iread: validation failed for inode 99
[  239.409242] 00000000a80c7e65: 49 4e 41 ed 03 01 00 00 00 00 03 e8 00 00 00 64  INA............d
[  239.409243] 00000000ba03f95e: 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 00  ................
[  239.409244] 000000004897c577: 5a 85 bd d9 16 ce 05 cf 59 5d 16 8d 1d e6 0d 5e  Z.......Y].....^
[  239.409245] 00000000a7d0657f: 59 63 97 ca 2e d7 1c f7 00 00 00 00 00 00 01 41  Yc.............A
[  239.409267] XFS (vdb): Internal error xfs_iread at line 514 of file fs/xfs/libxfs/xfs_inode_buf.c.  Caller xfs_iget+0x30d/0x700 [xfs]
[  239.409268] CPU: 0 PID: 2080 Comm: xfs_scrub Not tainted 4.15.3-storiq64 #1
[  239.409269] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
[  239.409270] Call Trace:
[  239.409290]  xfs_corruption_error+0x85/0x90 [xfs]
[  239.409308]  ? xfs_iget+0x30d/0x700 [xfs]
[  239.409325]  xfs_iread+0x1bd/0x1f0 [xfs]
[  239.409348]  ? xfs_iget+0x30d/0x700 [xfs]
[  239.409379]  xfs_iget+0x30d/0x700 [xfs]
[  239.409382]  ? kstrtoll+0x22/0x70
[  239.409397]  xfs_scrub_get_inode+0x79/0x180 [xfs]
[  239.409413]  xfs_scrub_setup_inode_bmap+0x11/0xb0 [xfs]
[  239.409427]  xfs_scrub_metadata+0x22d/0x2b0 [xfs]
[  239.409443]  ? xfs_scrub_bmap+0x380/0x380 [xfs]
[  239.409461]  xfs_ioc_scrub_metadata+0x41/0x70 [xfs]
[  239.409479]  xfs_file_ioctl+0x8be/0xa30 [xfs]
[  239.409481]  ? __queue_work+0xf7/0x2a0
[  239.409482]  ? pty_write+0x42/0x50
[  239.409484]  ? __clear_rsb+0x25/0x3d
[  239.409486]  ? __clear_rsb+0x15/0x3d
[  239.409488]  ? __clear_rsb+0x25/0x3d
[  239.409489]  ? __clear_rsb+0x15/0x3d
[  239.409491]  ? __clear_rsb+0x25/0x3d
[  239.409493]  ? __clear_rsb+0x15/0x3d
[  239.409494]  ? __clear_rsb+0x25/0x3d
[  239.409496]  ? __clear_rsb+0x15/0x3d
[  239.409497]  ? __clear_rsb+0x25/0x3d
[  239.409499]  ? __clear_rsb+0x15/0x3d
[  239.409501]  ? __clear_rsb+0x25/0x3d
[  239.409502]  ? __clear_rsb+0x15/0x3d
[  239.409504]  ? __clear_rsb+0x25/0x3d
[  239.409505]  ? __clear_rsb+0x15/0x3d
[  239.409507]  ? __clear_rsb+0x25/0x3d
[  239.409509]  ? __clear_rsb+0x15/0x3d
[  239.409510]  ? __clear_rsb+0x25/0x3d
[  239.409512]  ? __clear_rsb+0x15/0x3d
[  239.409514]  ? __clear_rsb+0x25/0x3d
[  239.409515]  ? __clear_rsb+0x15/0x3d
[  239.409517]  ? __clear_rsb+0x25/0x3d
[  239.409518]  ? __clear_rsb+0x15/0x3d
[  239.409520]  ? __clear_rsb+0x25/0x3d
[  239.409522]  ? __clear_rsb+0x15/0x3d
[  239.409523]  ? __clear_rsb+0x25/0x3d
[  239.409525]  ? __clear_rsb+0x15/0x3d
[  239.409526]  ? __clear_rsb+0x25/0x3d
[  239.409528]  ? __clear_rsb+0x15/0x3d
[  239.409530]  do_vfs_ioctl+0x86/0x5a0
[  239.409532]  ? __schedule+0x214/0x6d0
[  239.409534]  SyS_ioctl+0x36/0x70
[  239.409535]  ? exit_to_usermode_loop+0x6a/0x90
[  239.409537]  do_syscall_64+0x60/0x190
[  239.409539]  entry_SYSCALL_64_after_hwframe+0x21/0x86
[  239.409540] RIP: 0033:0x7f9c0acb41c7
[  239.409541] RSP: 002b:00007ffe2d223d48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  239.409542] RAX: ffffffffffffffda RBX: 000000000000000b RCX: 00007f9c0acb41c7
[  239.409543] RDX: 00007ffe2d223e90 RSI: 00000000c040583c RDI: 0000000000000003
[  239.409544] RBP: 00007ffe2d223e90 R08: 000000000040e263 R09: 00007f9c0ac1e99a
[  239.409545] R10: 00007f9c0af77460 R11: 0000000000000246 R12: 0000000000000003
[  239.409546] R13: 00007ffe2d226940 R14: 0000000000000001 R15: 00007ffe2d223f60
[  239.409547] XFS (vdb): Corruption detected. Unmount and run xfs_repair
[  239.409728] XFS (vdb): xfs_iread: validation failed for inode 99
[  239.409730] 00000000a80c7e65: 49 4e 41 ed 03 01 00 00 00 00 03 e8 00 00 00 64  INA............d
[  239.409732] 00000000ba03f95e: 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 00  ................
[  239.409733] 000000004897c577: 5a 85 bd d9 16 ce 05 cf 59 5d 16 8d 1d e6 0d 5e  Z.......Y].....^
[  239.409733] 00000000a7d0657f: 59 63 97 ca 2e d7 1c f7 00 00 00 00 00 00 01 41  Yc.............A
[  239.409752] XFS (vdb): Internal error xfs_iread at line 514 of file fs/xfs/libxfs/xfs_inode_buf.c.  Caller xfs_iget+0x30d/0x700 [xfs]
[  239.409754] CPU: 0 PID: 2080 Comm: xfs_scrub Not tainted 4.15.3-storiq64 #1
[  239.409755] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
[  239.409755] Call Trace:
[  239.409779]  xfs_corruption_error+0x85/0x90 [xfs]
[  239.409814]  ? xfs_iget+0x30d/0x700 [xfs]
[  239.409832]  xfs_iread+0x1bd/0x1f0 [xfs]
[  239.409851]  ? xfs_iget+0x30d/0x700 [xfs]
[  239.409869]  xfs_iget+0x30d/0x700 [xfs]
[  239.409885]  xfs_scrub_get_inode+0x79/0x180 [xfs]
[  239.409900]  xfs_scrub_setup_inode_contents+0x11/0x70 [xfs]
[  239.409916]  ? xfs_scrub_setup_xattr+0x3e/0x60 [xfs]
[  239.409930]  xfs_scrub_metadata+0x22d/0x2b0 [xfs]
[  239.409946]  ? xfs_scrub_xattr_rec+0x130/0x130 [xfs]
[  239.409970]  xfs_ioc_scrub_metadata+0x41/0x70 [xfs]
[  239.410005]  xfs_file_ioctl+0x8be/0xa30 [xfs]
[  239.410007]  ? __queue_work+0xf7/0x2a0
[  239.410018]  ? pty_write+0x42/0x50
[  239.410020]  ? __clear_rsb+0x25/0x3d
[  239.410022]  ? __clear_rsb+0x15/0x3d
[  239.410024]  ? __clear_rsb+0x25/0x3d
[  239.410025]  ? __clear_rsb+0x15/0x3d
[  239.410027]  ? __clear_rsb+0x25/0x3d
[  239.410028]  ? __clear_rsb+0x15/0x3d
[  239.410030]  ? __clear_rsb+0x25/0x3d
[  239.410031]  ? __clear_rsb+0x15/0x3d
[  239.410033]  ? __clear_rsb+0x25/0x3d
[  239.410034]  ? __clear_rsb+0x15/0x3d
[  239.410036]  ? __clear_rsb+0x25/0x3d
[  239.410037]  ? __clear_rsb+0x15/0x3d
[  239.410039]  ? __clear_rsb+0x25/0x3d
[  239.410040]  ? __clear_rsb+0x15/0x3d
[  239.410042]  ? __clear_rsb+0x25/0x3d
[  239.410044]  ? __clear_rsb+0x15/0x3d
[  239.410045]  ? __clear_rsb+0x25/0x3d
[  239.410047]  ? __clear_rsb+0x15/0x3d
[  239.410048]  ? __clear_rsb+0x25/0x3d
[  239.410050]  ? __clear_rsb+0x15/0x3d
[  239.410051]  ? __clear_rsb+0x25/0x3d
[  239.410053]  ? __clear_rsb+0x15/0x3d
[  239.410054]  ? __clear_rsb+0x25/0x3d
[  239.410056]  ? __clear_rsb+0x15/0x3d
[  239.410057]  ? __clear_rsb+0x25/0x3d
[  239.410059]  ? __clear_rsb+0x15/0x3d
[  239.410060]  ? __clear_rsb+0x25/0x3d
[  239.410062]  ? __clear_rsb+0x15/0x3d
[  239.410064]  do_vfs_ioctl+0x86/0x5a0
[  239.410066]  ? __schedule+0x214/0x6d0
[  239.410068]  SyS_ioctl+0x36/0x70
[  239.410069]  ? exit_to_usermode_loop+0x6a/0x90
[  239.410071]  do_syscall_64+0x60/0x190
[  239.410073]  entry_SYSCALL_64_after_hwframe+0x21/0x86
[  239.410074] RIP: 0033:0x7f9c0acb41c7
[  239.410075] RSP: 002b:00007ffe2d223d48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  239.410077] RAX: ffffffffffffffda RBX: 000000000000000b RCX: 00007f9c0acb41c7
[  239.410077] RDX: 00007ffe2d223e90 RSI: 00000000c040583c RDI: 0000000000000003
[  239.410078] RBP: 00007ffe2d223e90 R08: 000000000040e283 R09: 00007f9c0ac1e99a
[  239.410079] R10: 00007f9c0af77460 R11: 0000000000000246 R12: 0000000000000003
[  239.410080] R13: 00007ffe2d226940 R14: 0000000000000001 R15: 00007ffe2d223f60
[  239.410082] XFS (vdb): Corruption detected. Unmount and run xfs_repair
[  239.410256] XFS (vdb): xfs_iread: validation failed for inode 99
[  239.410258] 00000000a80c7e65: 49 4e 41 ed 03 01 00 00 00 00 03 e8 00 00 00 64  INA............d
[  239.410259] 00000000ba03f95e: 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00 00  ................
[  239.410260] 000000004897c577: 5a 85 bd d9 16 ce 05 cf 59 5d 16 8d 1d e6 0d 5e  Z.......Y].....^
[  239.410261] 00000000a7d0657f: 59 63 97 ca 2e d7 1c f7 00 00 00 00 00 00 01 41  Yc.............A
[  239.410282] XFS (vdb): Internal error xfs_iread at line 514 of file fs/xfs/libxfs/xfs_inode_buf.c.  Caller xfs_iget+0x30d/0x700 [xfs]
[  239.410284] CPU: 0 PID: 2080 Comm: xfs_scrub Not tainted 4.15.3-storiq64 #1
[  239.410285] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
[  239.410285] Call Trace:
[  239.410304]  xfs_corruption_error+0x85/0x90 [xfs]
[  239.410323]  ? xfs_iget+0x30d/0x700 [xfs]
[  239.410340]  xfs_iread+0x1bd/0x1f0 [xfs]
[  239.410362]  ? xfs_iget+0x30d/0x700 [xfs]
[  239.410396]  xfs_iget+0x30d/0x700 [xfs]
[  239.410412]  xfs_scrub_get_inode+0x79/0x180 [xfs]
[  239.410427]  xfs_scrub_setup_inode_contents+0x11/0x70 [xfs]
[  239.410442]  xfs_scrub_metadata+0x22d/0x2b0 [xfs]
[  239.410456]  ? xfs_scrub_parent_validate+0x240/0x240 [xfs]
[  239.410475]  xfs_ioc_scrub_metadata+0x41/0x70 [xfs]
[  239.410494]  xfs_file_ioctl+0x8be/0xa30 [xfs]
[  239.410496]  ? __queue_work+0xf7/0x2a0
[  239.410498]  ? pty_write+0x42/0x50
[  239.410500]  ? __clear_rsb+0x25/0x3d
[  239.410501]  ? __clear_rsb+0x15/0x3d
[  239.410503]  ? __clear_rsb+0x25/0x3d
[  239.410505]  ? __clear_rsb+0x15/0x3d
[  239.410506]  ? __clear_rsb+0x25/0x3d
[  239.410508]  ? __clear_rsb+0x15/0x3d
[  239.410509]  ? __clear_rsb+0x25/0x3d
[  239.410511]  ? __clear_rsb+0x15/0x3d
[  239.410512]  ? __clear_rsb+0x25/0x3d
[  239.410514]  ? __clear_rsb+0x15/0x3d
[  239.410515]  ? __clear_rsb+0x25/0x3d
[  239.410517]  ? __clear_rsb+0x15/0x3d
[  239.410519]  ? __clear_rsb+0x25/0x3d
[  239.410520]  ? __clear_rsb+0x15/0x3d
[  239.410522]  ? __clear_rsb+0x25/0x3d
[  239.410523]  ? __clear_rsb+0x15/0x3d
[  239.410525]  ? __clear_rsb+0x25/0x3d
[  239.410526]  ? __clear_rsb+0x15/0x3d
[  239.410528]  ? __clear_rsb+0x25/0x3d
[  239.410529]  ? __clear_rsb+0x15/0x3d
[  239.410531]  ? __clear_rsb+0x25/0x3d
[  239.410532]  ? __clear_rsb+0x15/0x3d
[  239.410534]  ? __clear_rsb+0x25/0x3d
[  239.410535]  ? __clear_rsb+0x15/0x3d
[  239.410537]  ? __clear_rsb+0x25/0x3d
[  239.410539]  ? __clear_rsb+0x15/0x3d
[  239.410540]  ? __clear_rsb+0x25/0x3d
[  239.410542]  ? __clear_rsb+0x15/0x3d
[  239.410543]  do_vfs_ioctl+0x86/0x5a0
[  239.410546]  ? __schedule+0x214/0x6d0
[  239.410547]  SyS_ioctl+0x36/0x70
[  239.410549]  ? exit_to_usermode_loop+0x6a/0x90
[  239.410550]  do_syscall_64+0x60/0x190
[  239.410552]  entry_SYSCALL_64_after_hwframe+0x21/0x86
[  239.410553] RIP: 0033:0x7f9c0acb41c7
[  239.410554] RSP: 002b:00007ffe2d223d48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  239.410556] RAX: ffffffffffffffda RBX: 000000000000000b RCX: 00007f9c0acb41c7
[  239.410557] RDX: 00007ffe2d223e90 RSI: 00000000c040583c RDI: 0000000000000003
[  239.410558] RBP: 00007ffe2d223e90 R08: 000000000040e2a5 R09: 00007f9c0ac1e99a
[  239.410558] R10: 00007f9c0af77460 R11: 0000000000000246 R12: 0000000000000003
[  239.410559] R13: 00007ffe2d226940 R14: 0000000000000001 R15: 00007ffe2d223f60
[  239.410561] XFS (vdb): Corruption detected. Unmount and run xfs_repair
[  239.410679] systemd-journald[197]: /dev/kmsg buffer overrun, some messages lost.
[  289.069032] XFS (vdb): Unmounting Filesystem
[  347.669570] XFS (vdb): EXPERIMENTAL reflink feature enabled. Use at your own risk!
[  347.669785] XFS (vdb): Mounting V5 Filesystem
[  347.678771] XFS (vdb): Ending clean mount
[  402.947693] XFS (vdb): Unmounting Filesystem
[  476.483462] XFS (vdb): EXPERIMENTAL reflink feature enabled. Use at your own risk!
[  476.483653] XFS (vdb): Mounting V5 Filesystem
[  476.494540] XFS (vdb): xfs_iread: validation failed for inode 96
[  476.494548] 00000000687389b7: 49 4e 41 ed 03 01 00 00 00 00 00 00 00 00 00 00  INA.............
[  476.494550] 00000000119c2671: 00 00 00 05 00 00 00 00 00 00 00 00 00 00 00 00  ................
[  476.494552] 00000000f81aa31f: 5a 85 cc 89 3a 7d aa 56 5a 85 cb d6 2c 7a 9d 23  Z...:}.VZ...,z.#
[  476.494553] 0000000073ce204e: 5a 85 cb d6 2c 7a 9d 23 00 00 00 00 00 00 00 3c  Z...,z.#.......<
[  476.494622] XFS (vdb): Internal error xfs_iread at line 514 of file fs/xfs/libxfs/xfs_inode_buf.c.  Caller xfs_iget+0x30d/0x700 [xfs]
[  476.494627] CPU: 0 PID: 2450 Comm: mount Not tainted 4.15.3-storiq64 #1
[  476.494629] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.7.5-20140531_083030-gandalf 04/01/2014
[  476.494631] Call Trace:
[  476.494662]  xfs_corruption_error+0x85/0x90 [xfs]
[  476.494686]  ? xfs_iget+0x30d/0x700 [xfs]
[  476.494707]  xfs_iread+0x1bd/0x1f0 [xfs]
[  476.494730]  ? xfs_iget+0x30d/0x700 [xfs]
[  476.494751]  xfs_iget+0x30d/0x700 [xfs]
[  476.494773]  ? xlog_cil_init_post_recovery+0x27/0x50 [xfs]
[  476.494793]  xfs_mountfs+0x542/0x900 [xfs]
[  476.494815]  xfs_fs_fill_super+0x35d/0x4f0 [xfs]
[  476.494837]  ? xfs_test_remount_options.isra.24+0x50/0x50 [xfs]
[  476.494843]  mount_bdev+0x16d/0x1a0
[  476.494869]  mount_fs+0xc/0x70
[  476.494879]  vfs_kern_mount+0x59/0x110
[  476.494893]  ? __get_fs_type+0x17/0x30
[  476.494896]  do_mount+0x196/0xb50
[  476.494909]  ? memdup_user+0x39/0x60
[  476.494912]  SyS_mount+0x7f/0xc0
[  476.494917]  do_syscall_64+0x60/0x190
[  476.494924]  entry_SYSCALL_64_after_hwframe+0x21/0x86
[  476.494928] RIP: 0033:0x7f8a43e06d8a
[  476.494930] RSP: 002b:00007ffc2baaa498 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
[  476.494933] RAX: ffffffffffffffda RBX: 000000000060b040 RCX: 00007f8a43e06d8a
[  476.494934] RDX: 000000000060f620 RSI: 000000000060df30 RDI: 000000000060b220
[  476.494935] RBP: 0000000000000000 R08: 0000000000000000 R09: 00007f8a43d6999a
[  476.494936] R10: 00000000c0ed0000 R11: 0000000000000202 R12: 000000000060b220
[  476.494937] R13: 000000000060f620 R14: 0000000000000000 R15: 0000000000000001
[  476.494940] XFS (vdb): Corruption detected. Unmount and run xfs_repair
[  476.494948] XFS (vdb): failed to read root inode


Et voilà :)
-- 
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Emmanuel Florac     |   Direction technique
                    |   Intellique
                    |	[off-list ref]
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