diff options
Diffstat (limited to 'block/qcow2.h')
| -rw-r--r-- | block/qcow2.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/block/qcow2.h b/block/qcow2.h index a33431f05a..40910d817d 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -459,6 +459,11 @@ static inline uint64_t l2meta_cow_end(QCowL2Meta *m) + (m->cow_end.nb_sectors << BDRV_SECTOR_BITS); } +static inline uint16_t refcount_diff(uint16_t r1, uint16_t r2) +{ + return r1 > r2 ? r1 - r2 : r2 - r1; +} + // FIXME Need qcow2_ prefix to global functions /* qcow2.c functions */ @@ -482,7 +487,8 @@ int qcow2_get_refcount(BlockDriverState *bs, int64_t cluster_index, uint16_t *refcount); int qcow2_update_cluster_refcount(BlockDriverState *bs, int64_t cluster_index, - int addend, enum qcow2_discard_type type); + uint16_t addend, bool decrease, + enum qcow2_discard_type type); int64_t qcow2_alloc_clusters(BlockDriverState *bs, uint64_t size); int qcow2_alloc_clusters_at(BlockDriverState *bs, uint64_t offset, |