block: Create authorizations mechanism for external snapshot and resize.

Signed-off-by: Benoit Canet <benoit@irqsave.net>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/blockdev.c b/blockdev.c
index 2f4065e..32a356e 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -1243,7 +1243,7 @@ static void external_snapshot_prepare(BlkTransactionState *common,
         }
     }
 
-    if (bdrv_check_ext_snapshot(state->old_bs) != EXT_SNAPSHOT_ALLOWED) {
+    if (!bdrv_is_first_non_filter(state->old_bs)) {
         error_set(errp, QERR_FEATURE_DISABLED, "snapshot");
         return;
     }