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qemu-img check -r for repairing images

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The QED block driver already provides the functionality to not only
detect inconsistencies in images, but also fix them. However, this
functionality cannot be manually invoked with qemu-img, but the
check happens only automatically during bdrv_open().

This adds a -r switch to qemu-img check that allows manual invocation
of an image repair.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2012-05-11 16:07:02 +02:00
parent dfc65f1f78
commit 4534ff5426
9 changed files with 55 additions and 14 deletions
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7
qemu-img.texi
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@ -70,10 +70,15 @@ lists all snapshots in the given image
Command description:
@table @option
@item check [-f @var{fmt}] @var{filename}
@item check [-f @var{fmt}] [-r [leaks | all]] @var{filename}
Perform a consistency check on the disk image @var{filename}.
If @code{-r} is specified, qemu-img tries to repair any inconsistencies found
during the check. @code{-r leaks} repairs only cluster leaks, whereas
@code{-r all} fixes all kinds of errors, with a higher risk of choosing the
wrong fix or hiding corruption that has already occured.
Only the formats @code{qcow2}, @code{qed} and @code{vdi} support
consistency checks.