diff options
Diffstat (limited to 'block.c')
-rw-r--r-- | block.c | 100 |
1 files changed, 0 insertions, 100 deletions
@@ -3357,111 +3357,11 @@ bool bdrv_debug_is_suspended(BlockDriverState *bs, const char *tag) return false; } -/**************************************************************/ -/* handling of snapshots */ - -int bdrv_can_snapshot(BlockDriverState *bs) -{ - BlockDriver *drv = bs->drv; - if (!drv || !bdrv_is_inserted(bs) || bdrv_is_read_only(bs)) { - return 0; - } - - if (!drv->bdrv_snapshot_create) { - if (bs->file != NULL) { - return bdrv_can_snapshot(bs->file); - } - return 0; - } - - return 1; -} - int bdrv_is_snapshot(BlockDriverState *bs) { return !!(bs->open_flags & BDRV_O_SNAPSHOT); } -int bdrv_snapshot_create(BlockDriverState *bs, - QEMUSnapshotInfo *sn_info) -{ - BlockDriver *drv = bs->drv; - if (!drv) - return -ENOMEDIUM; - if (drv->bdrv_snapshot_create) - return drv->bdrv_snapshot_create(bs, sn_info); - if (bs->file) - return bdrv_snapshot_create(bs->file, sn_info); - return -ENOTSUP; -} - -int bdrv_snapshot_goto(BlockDriverState *bs, - const char *snapshot_id) -{ - BlockDriver *drv = bs->drv; - int ret, open_ret; - - if (!drv) - return -ENOMEDIUM; - if (drv->bdrv_snapshot_goto) - return drv->bdrv_snapshot_goto(bs, snapshot_id); - - if (bs->file) { - drv->bdrv_close(bs); - ret = bdrv_snapshot_goto(bs->file, snapshot_id); - open_ret = drv->bdrv_open(bs, NULL, bs->open_flags); - if (open_ret < 0) { - bdrv_delete(bs->file); - bs->drv = NULL; - return open_ret; - } - return ret; - } - - return -ENOTSUP; -} - -int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id) -{ - BlockDriver *drv = bs->drv; - if (!drv) - return -ENOMEDIUM; - if (drv->bdrv_snapshot_delete) - return drv->bdrv_snapshot_delete(bs, snapshot_id); - if (bs->file) - return bdrv_snapshot_delete(bs->file, snapshot_id); - return -ENOTSUP; -} - -int bdrv_snapshot_list(BlockDriverState *bs, - QEMUSnapshotInfo **psn_info) -{ - BlockDriver *drv = bs->drv; - if (!drv) - return -ENOMEDIUM; - if (drv->bdrv_snapshot_list) - return drv->bdrv_snapshot_list(bs, psn_info); - if (bs->file) - return bdrv_snapshot_list(bs->file, psn_info); - return -ENOTSUP; -} - -int bdrv_snapshot_load_tmp(BlockDriverState *bs, - const char *snapshot_name) -{ - BlockDriver *drv = bs->drv; - if (!drv) { - return -ENOMEDIUM; - } - if (!bs->read_only) { - return -EINVAL; - } - if (drv->bdrv_snapshot_load_tmp) { - return drv->bdrv_snapshot_load_tmp(bs, snapshot_name); - } - return -ENOTSUP; -} - /* backing_file can either be relative, or absolute, or a protocol. If it is * relative, it must be relative to the chain. So, passing in bs->filename * from a BDS as backing_file should not be done, as that may be relative to |