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vmdk: Leave bdi intact if -ENOTSUP in vmdk_get_info

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When extent types don't match, we return -ENOTSUP. In this case, be
polite to the caller and don't modify bdi.

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-id: 1415938161-16217-1-git-send-email-famz@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Fam Zheng 2014-11-14 12:09:21 +08:00 committed by Stefan Hajnoczi
parent f3a9cfddae
commit 5f58330790
1 changed files with 14 additions and 8 deletions
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22
block/vmdk.c
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@ -2137,23 +2137,29 @@ static ImageInfoSpecific *vmdk_get_specific_info(BlockDriverState *bs)
return spec_info;
}
static bool vmdk_extents_type_eq(const VmdkExtent *a, const VmdkExtent *b)
{
return a->flat == b->flat &&
a->compressed == b->compressed &&
(a->flat || a->cluster_sectors == b->cluster_sectors);
}
static int vmdk_get_info(BlockDriverState *bs, BlockDriverInfo *bdi)
{
int i;
BDRVVmdkState *s = bs->opaque;
assert(s->num_extents);
/* See if we have multiple extents but they have different cases */
for (i = 1; i < s->num_extents; i++) {
if (!vmdk_extents_type_eq(&s->extents[0], &s->extents[i])) {
return -ENOTSUP;
}
}
bdi->needs_compressed_writes = s->extents[0].compressed;
if (!s->extents[0].flat) {
bdi->cluster_size = s->extents[0].cluster_sectors << BDRV_SECTOR_BITS;
}
/* See if we have multiple extents but they have different cases */
for (i = 1; i < s->num_extents; i++) {
if (bdi->needs_compressed_writes != s->extents[i].compressed ||
(bdi->cluster_size && bdi->cluster_size !=
s->extents[i].cluster_sectors << BDRV_SECTOR_BITS)) {
return -ENOTSUP;
}
}
return 0;
}