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reflink: test CoW behavior with IO errors

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Test various scenarios (with dm-flakey) where we simulate write
failures during CoW, to see if the FS can get through it without
blowing up or corrupting data.  Plumb in a FS-generic method to
sort out repairing filesystems after they get hit by IO errors.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Darrick J. Wong
2016-01-05 16:03:30 -08:00
parent 58ac6c6424
commit c741fbfd99
25 changed files with 1350 additions and 0 deletions
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tests/generic/266.out
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QA output created by 266
Format and mount
Create the original files
Compare files
1886e67cf8783e89ce6ddc5bb09a3944 SCRATCH_MNT/test-266/file1
1886e67cf8783e89ce6ddc5bb09a3944 SCRATCH_MNT/test-266/file2
CoW and unmount
fdatasync: Input/output error
Clean up the mess
Compare files
1886e67cf8783e89ce6ddc5bb09a3944 SCRATCH_MNT/test-266/file1