block: Request child permissions in filter drivers

All callers will have to request permissions for all of their child
nodes. Block drivers that act as simply filters can use the default
implementation of .bdrv_child_perm().

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Acked-by: Fam Zheng <famz@redhat.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/block/quorum.c b/block/quorum.c
index bdbcec6e00..40205fb1b3 100644
--- a/block/quorum.c
+++ b/block/quorum.c
@@ -1133,6 +1133,8 @@ static BlockDriver bdrv_quorum = {
     .bdrv_add_child                     = quorum_add_child,
     .bdrv_del_child                     = quorum_del_child,
 
+    .bdrv_child_perm                    = bdrv_filter_default_perms,
+
     .is_filter                          = true,
     .bdrv_recurse_is_first_non_filter   = quorum_recurse_is_first_non_filter,
 };