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qcow2: Repair unaligned preallocated zero clusters

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We can easily repair unaligned preallocated zero clusters by discarding
them, so why not do it?

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20171110203759.14018-2-mreitz@redhat.com
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Max Reitz 2017-11-10 21:37:59 +01:00
parent 7c3a302859
commit ac5b787a6e
3 changed files with 69 additions and 13 deletions
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9
tests/qemu-iotests/060.out
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@ -317,6 +317,15 @@ discard 65536/65536 bytes at offset 0
64 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
qcow2: Marking image as corrupt: Preallocated zero cluster offset 0x2a00 unaligned (guest offset: 0); further corruption events will be suppressed
write failed: Input/output error
--- Repairing ---
Repairing offset=2a00: Preallocated zero cluster is not properly aligned; L2 entry corrupted.
The following inconsistencies were found and repaired:
0 leaked clusters
1 corruptions
Double checking the fixed image now...
No errors were found on the image.
=== Discarding with an unaligned refblock ===