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qcow2: check_errors are fatal

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When trying to repair a dirty image, qcow2_check() may apparently
succeed (no really fatal error occurred that would prevent the check
from continuing), but if check_errors in the result object is non-zero,
we cannot trust the image to be usable.

Reported-by: R. Nageswara Sastry <nasastry@in.ibm.com>
Buglink: https://bugs.launchpad.net/qemu/+bug/1728639
Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-id: 20171110203111.7666-2-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 21:31:07 +01:00
parent 3e3b838ffe
commit 791fff504c
3 changed files with 47 additions and 1 deletions
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5
block/qcow2.c
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@ -1477,7 +1477,10 @@ static int qcow2_do_open(BlockDriverState *bs, QDict *options, int flags,
BdrvCheckResult result = {0};
ret = qcow2_check(bs, &result, BDRV_FIX_ERRORS | BDRV_FIX_LEAKS);
if (ret < 0) {
if (ret < 0 || result.check_errors) {
if (ret >= 0) {
ret = -EIO;
}
error_setg_errno(errp, -ret, "Could not repair dirty image");
goto fail;
}