+static void
+dpif_dummy_change_port_number(struct unixctl_conn *conn, int argc OVS_UNUSED,
+ const char *argv[], void *aux OVS_UNUSED)
+{
+ struct dp_netdev_port *port;
+ struct dp_netdev *dp;
+ int port_no;
+
+ dp = shash_find_data(&dp_netdevs, argv[1]);
+ if (!dp || !dpif_netdev_class_is_dummy(dp->class)) {
+ unixctl_command_reply_error(conn, "unknown datapath or not a dummy");
+ return;
+ }
+
+ if (get_port_by_name(dp, argv[2], &port)) {
+ unixctl_command_reply_error(conn, "unknown port");
+ return;
+ }
+
+ port_no = atoi(argv[3]);
+ if (port_no <= 0 || port_no >= MAX_PORTS) {
+ unixctl_command_reply_error(conn, "bad port number");
+ return;
+ }
+ if (dp->ports[port_no]) {
+ unixctl_command_reply_error(conn, "port number already in use");
+ return;
+ }
+ dp->ports[odp_to_u32(port->port_no)] = NULL;
+ dp->ports[port_no] = port;
+ port->port_no = u32_to_odp(port_no);
+ seq_change(dp->port_seq);
+ unixctl_command_reply(conn, NULL);
+}
+