diff options
| -rw-r--r-- | block/snapshot.c | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/block/snapshot.c b/block/snapshot.c index 6e9fa8d..2d86b88 100644 --- a/block/snapshot.c +++ b/block/snapshot.c @@ -229,6 +229,8 @@ int bdrv_snapshot_delete(BlockDriverState *bs, Error **errp) { BlockDriver *drv = bs->drv; + int ret; + if (!drv) { error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, bdrv_get_device_name(bs)); return -ENOMEDIUM; @@ -239,18 +241,21 @@ int bdrv_snapshot_delete(BlockDriverState *bs, } /* drain all pending i/o before deleting snapshot */ - bdrv_drain(bs); + bdrv_drained_begin(bs); if (drv->bdrv_snapshot_delete) { - return drv->bdrv_snapshot_delete(bs, snapshot_id, name, errp); + ret = drv->bdrv_snapshot_delete(bs, snapshot_id, name, errp); + } else if (bs->file) { + ret = bdrv_snapshot_delete(bs->file->bs, snapshot_id, name, errp); + } else { + error_setg(errp, "Block format '%s' used by device '%s' " + "does not support internal snapshot deletion", + drv->format_name, bdrv_get_device_name(bs)); + ret = -ENOTSUP; } - if (bs->file) { - return bdrv_snapshot_delete(bs->file->bs, snapshot_id, name, errp); - } - error_setg(errp, "Block format '%s' used by device '%s' " - "does not support internal snapshot deletion", - drv->format_name, bdrv_get_device_name(bs)); - return -ENOTSUP; + + bdrv_drained_end(bs); + return ret; } int bdrv_snapshot_delete_by_id_or_name(BlockDriverState *bs, |