librbd/api: set `image_snap_name` as empty string for mirror gp snap

The member image snapshots of a mirror group snap do not share a
common name unlike those of a user group snap. So set the
`image_snap_name` to an empty string.

Signed-off-by: Ramana Raja <rraja@redhat.com>

diff --git a/src/librbd/api/Group.cc b/src/librbd/api/Group.cc
index 69ce5776e00f4cfb896cced71c408f947fbbc4c1..466f231499fd74232d6c242d03b8dab621014fe7 100644 (file)
--- a/src/librbd/api/Group.cc
+++ b/src/librbd/api/Group.cc
@@ -256,7 +256,8 @@ int GroupSnapshot_to_group_snap_info2(
   group_snap->namespace_type = static_cast<group_snap_namespace_type_t>(
     cls::rbd::get_group_snap_namespace_type(cls_group_snap.snapshot_namespace));
 
-  if (!image_snaps.empty()) {
+  if (!image_snaps.empty() &&
+      group_snap->namespace_type == RBD_GROUP_SNAP_NAMESPACE_TYPE_USER) {
     group_snap->image_snap_name = calc_ind_image_snap_name(
         group_ioctx.get_id(), group_id, cls_group_snap.id);
   }