diff options
Diffstat (limited to 'block/qcow2.c')
| -rw-r--r-- | block/qcow2.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/block/qcow2.c b/block/qcow2.c index 49d7cff17a..c9306a78c1 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -2413,7 +2413,7 @@ static bool is_zero_cluster(BlockDriverState *bs, int64_t start) BlockDriverState *file; int64_t res = bdrv_get_block_status_above(bs, NULL, start, s->cluster_sectors, &nr, &file); - return res >= 0 && ((res & BDRV_BLOCK_ZERO) || !(res & BDRV_BLOCK_DATA)); + return res >= 0 && (res & BDRV_BLOCK_ZERO) && nr == s->cluster_sectors; } static bool is_zero_cluster_top_locked(BlockDriverState *bs, int64_t start) @@ -2424,6 +2424,7 @@ static bool is_zero_cluster_top_locked(BlockDriverState *bs, int64_t start) int ret; ret = qcow2_get_cluster_offset(bs, start << BDRV_SECTOR_BITS, &nr, &off); + assert(nr == s->cluster_sectors); return ret == QCOW2_CLUSTER_UNALLOCATED || ret == QCOW2_CLUSTER_ZERO; } |