rbd: this command should be EXPORT_DIFF

Fixes: http://tracker.ceph.com/issues/17671
Signed-off-by: liyankun <lioveni99@gmail.com>

diff --git a/src/rbd.cc b/src/rbd.cc
index 372c657cb6c524959ee44cd06daafef19fbbb605..e9640644e6ffbe80e5d4e56b7122c505760300f1 100644 (file)
--- a/src/rbd.cc
+++ b/src/rbd.cc
@@ -3048,7 +3048,7 @@ if (!set_conf_param(v, p1, p2, p3)) { \
        opt_cmd == OPT_STATUS)) {
 
     if (opt_cmd == OPT_INFO || opt_cmd == OPT_SNAP_LIST ||
-       opt_cmd == OPT_EXPORT || opt_cmd == OPT_EXPORT || opt_cmd == OPT_COPY ||
+       opt_cmd == OPT_EXPORT || opt_cmd == OPT_EXPORT_DIFF || opt_cmd == OPT_COPY ||
        opt_cmd == OPT_CHILDREN || opt_cmd == OPT_LOCK_LIST ||
         opt_cmd == OPT_STATUS || opt_cmd == OPT_WATCH) {
       r = rbd.open_read_only(io_ctx, image, imgname, NULL);