librbd: add LIBRBD_SUPPORTS_GROUP_SNAP_GET_INFO define

Make it easier to test if rbd_group_snap_get_info() and by extension
also rbd_group_snap_list2() APIs are available at compile time.  This
wasn't done in commit e5ccce14c4b0 ("rbd: add group snap info command")
because backporting wasn't intended.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

diff --git a/src/include/rbd/librbd.h b/src/include/rbd/librbd.h
index 7144e2038c1ca3501144ae4dae6c03015dbb56ff..e9ace0c4936f5ff9200e9b9656f9ca7d7f16a0ac 100644 (file)
--- a/src/include/rbd/librbd.h
+++ b/src/include/rbd/librbd.h
@@ -51,6 +51,7 @@ extern "C" {
 #define LIBRBD_SUPPORTS_WRITE_ZEROES 1
 #define LIBRBD_SUPPORTS_ENCRYPTION 1
 #define LIBRBD_SUPPORTS_ENCRYPTION_LOAD2 1
+#define LIBRBD_SUPPORTS_GROUP_SNAP_GET_INFO 1
 
 #if __GNUC__ >= 4
   #define CEPH_RBD_API          __attribute__ ((visibility ("default")))