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| author | Max Reitz <mreitz@redhat.com> | 2013-09-03 10:09:52 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2013-09-12 10:12:46 +0200 |
| commit | 32b6444d23d0ff618d73e5b766600cd258066169 (patch) | |
| tree | 423a268eaa2281d71e0d7d1d75ade22e153510aa /block/qcow2.h | |
| parent | e7108feaace8e02b3a4bf010448fc2744f753381 (diff) | |
| download | qemu-32b6444d23d0ff618d73e5b766600cd258066169.tar.gz | |
qcow2-cluster: Expand zero clusters
Add functionality for expanding zero clusters. This is necessary for
downgrading the image version to one without zero cluster support.
For non-backed images, this function may also just discard zero clusters
instead of truly expanding them.
Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block/qcow2.h')
| -rw-r--r-- | block/qcow2.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/block/qcow2.h b/block/qcow2.h index 35c822b8a6..48080fdc03 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -411,6 +411,9 @@ int qcow2_update_header(BlockDriverState *bs); int qcow2_refcount_init(BlockDriverState *bs); void qcow2_refcount_close(BlockDriverState *bs); +int qcow2_update_cluster_refcount(BlockDriverState *bs, int64_t cluster_index, + int addend, enum qcow2_discard_type type); + int64_t qcow2_alloc_clusters(BlockDriverState *bs, int64_t size); int qcow2_alloc_clusters_at(BlockDriverState *bs, uint64_t offset, int nb_clusters); @@ -458,6 +461,8 @@ int qcow2_discard_clusters(BlockDriverState *bs, uint64_t offset, int nb_sectors, enum qcow2_discard_type type); int qcow2_zero_clusters(BlockDriverState *bs, uint64_t offset, int nb_sectors); +int qcow2_expand_zero_clusters(BlockDriverState *bs); + /* qcow2-snapshot.c functions */ int qcow2_snapshot_create(BlockDriverState *bs, QEMUSnapshotInfo *sn_info); int qcow2_snapshot_goto(BlockDriverState *bs, const char *snapshot_id); |