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vmdk: Fix calculation of block status's offset

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"offset" is the offset of cluster and sector_num doesn't necessarily
refer to the start of it, it should add index_in_cluster.

Signed-off-by: Fam Zheng <famz@redhat.com>
Message-id: 1453780743-16806-12-git-send-email-famz@redhat.com
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Fam Zheng 2016-01-26 11:58:58 +08:00 committed by Max Reitz
parent 7429e20788
commit d0a18f1025
1 changed files with 4 additions and 2 deletions
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6
block/vmdk.c
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@ -1278,6 +1278,7 @@ static int64_t coroutine_fn vmdk_co_get_block_status(BlockDriverState *bs,
0, 0);
qemu_co_mutex_unlock(&s->lock);
index_in_cluster = vmdk_find_index_in_cluster(extent, sector_num);
switch (ret) {
case VMDK_ERROR:
ret = -EIO;
@ -1291,13 +1292,14 @@ static int64_t coroutine_fn vmdk_co_get_block_status(BlockDriverState *bs,
case VMDK_OK:
ret = BDRV_BLOCK_DATA;
if (extent->file == bs->file && !extent->compressed) {
ret |= BDRV_BLOCK_OFFSET_VALID | offset;
ret |= BDRV_BLOCK_OFFSET_VALID;
ret |= (offset + (index_in_cluster << BDRV_SECTOR_BITS))
& BDRV_BLOCK_OFFSET_MASK;
}
break;
}
index_in_cluster = vmdk_find_index_in_cluster(extent, sector_num);
n = extent->cluster_sectors - index_in_cluster;
if (n > nb_sectors) {
n = nb_sectors;