@@ -401,6 +401,51 @@ int bdrv_snapshot_load_tmp_by_id_or_name(BlockDriverState *bs,
return ret;
}
+int bdrv_snapshot_save_dependency(BlockDriverState *bs,
+ const char *depend_snapshot_id,
+ int64_t depend_offset,
+ int64_t depend_size,
+ int64_t offset,
+ Error **errp)
+{
+ BlockDriver *drv = bs->drv;
+
+ if (!drv) {
+ return -ENOMEDIUM;
+ }
+
+ if (drv->bdrv_snapshot_save_dependency) {
+ return drv->bdrv_snapshot_save_dependency(bs, depend_snapshot_id,
+ depend_offset, depend_size,
+ offset, errp);
+ }
+
+ if (bs->file) {
+ return bdrv_snapshot_save_dependency(bs->file->bs, depend_snapshot_id,
+ depend_offset, depend_size,
+ offset, errp);
+ }
+
+ return -ENOTSUP;
+}
+
+int bdrv_snapshot_support_dependency(BlockDriverState *bs, int32_t *alignment)
+{
+ BlockDriver *drv = bs->drv;
+ if (!drv || !bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) {
+ return 0;
+ }
+
+ if (drv->bdrv_snapshot_support_dependency) {
+ return drv->bdrv_snapshot_support_dependency(bs, alignment);
+ }
+
+ if (bs->file != NULL) {
+ return bdrv_snapshot_support_dependency(bs->file->bs, alignment);
+ }
+
+ return -ENOTSUP;
+}
/* Group operations. All block drivers are involved.
* These functions will properly handle dataplane (take aio_context_acquire
@@ -73,6 +73,13 @@ int bdrv_snapshot_load_tmp(BlockDriverState *bs,
int bdrv_snapshot_load_tmp_by_id_or_name(BlockDriverState *bs,
const char *id_or_name,
Error **errp);
+int bdrv_snapshot_save_dependency(BlockDriverState *bs,
+ const char *depend_snapshot_id,
+ int64_t depend_offset,
+ int64_t depend_size,
+ int64_t offset,
+ Error **errp);
+int bdrv_snapshot_support_dependency(BlockDriverState *bs, int32_t *alignment);
/* Group operations. All block drivers are involved.