+extern struct req_msg_field RMF_OST_ID;
+
+/* MGS config read message format */
+extern struct req_msg_field RMF_MGS_CONFIG_BODY;
+extern struct req_msg_field RMF_MGS_CONFIG_RES;
+
+/* generic uint32 */
+extern struct req_msg_field RMF_U32;
+
+/* OBJ update format */
+extern struct req_msg_field RMF_OUT_UPDATE;
+extern struct req_msg_field RMF_OUT_UPDATE_REPLY;
+extern struct req_msg_field RMF_OUT_UPDATE_HEADER;
+extern struct req_msg_field RMF_OUT_UPDATE_BUF;
+
+/* LFSCK format */
+extern struct req_msg_field RMF_LFSCK_REQUEST;
+extern struct req_msg_field RMF_LFSCK_REPLY;