diff options
Diffstat (limited to 'block/qcow2-refcount.c')
| -rw-r--r-- | block/qcow2-refcount.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c index b70afe9639..3f461c6890 100644 --- a/block/qcow2-refcount.c +++ b/block/qcow2-refcount.c @@ -389,6 +389,34 @@ void free_clusters(BlockDriverState *bs, update_refcount(bs, offset, size, -1); } +/* + * free_any_clusters + * + * free clusters according to its type: compressed or not + * + */ + +void free_any_clusters(BlockDriverState *bs, + uint64_t cluster_offset, int nb_clusters) +{ + BDRVQcowState *s = bs->opaque; + + /* free the cluster */ + + if (cluster_offset & QCOW_OFLAG_COMPRESSED) { + int nb_csectors; + nb_csectors = ((cluster_offset >> s->csize_shift) & + s->csize_mask) + 1; + free_clusters(bs, (cluster_offset & s->cluster_offset_mask) & ~511, + nb_csectors * 512); + return; + } + + free_clusters(bs, cluster_offset, nb_clusters << s->cluster_bits); + + return; +} + /*********************************************************/ |