rbd: wire up snapshot removal and rollback functionality

Signed-off-by: NGreg Farnum <gregory.farnum@dreamhost.com>
Reviewed-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

block/rbd.c

@@ -789,6 +789,26 @@ static int qemu_rbd_snap_create(BlockDriverState *bs,
     return 0;
 }
 
+static int qemu_rbd_snap_remove(BlockDriverState *bs,
+                                const char *snapshot_name)
+{
+    BDRVRBDState *s = bs->opaque;
+    int r;
+
+    r = rbd_snap_remove(s->image, snapshot_name);
+    return r;
+}
+
+static int qemu_rbd_snap_rollback(BlockDriverState *bs,
+                                  const char *snapshot_name)
+{
+    BDRVRBDState *s = bs->opaque;
+    int r;
+
+    r = rbd_snap_rollback(s->image, snapshot_name);
+    return r;
+}
+
 static int qemu_rbd_snap_list(BlockDriverState *bs,
                               QEMUSnapshotInfo **psn_tab)
 {
@@ -862,7 +882,9 @@ static BlockDriver bdrv_rbd = {
     .bdrv_co_flush_to_disk  = qemu_rbd_co_flush,
 
     .bdrv_snapshot_create   = qemu_rbd_snap_create,
+    .bdrv_snapshot_delete   = qemu_rbd_snap_remove,
     .bdrv_snapshot_list     = qemu_rbd_snap_list,
+    .bdrv_snapshot_goto     = qemu_rbd_snap_rollback,
 };
 
 static void bdrv_rbd_init(void)