- assert(iface->ofp_port < 0 && ofp_port >= 0);
- iface->ofp_port = ofp_port;
- hmap_insert(&br->ifaces, &iface->ofp_port_node, hash_int(ofp_port, 0));
- iface_set_ofport(iface->cfg, ofp_port);
+ struct iface *iface = iface_lookup(br, name);
+ if (iface) {
+ /* Check that the name-to-number mapping is one-to-one. */
+ if (iface->ofp_port >= 0) {
+ VLOG_WARN("bridge %s: interface %s reported twice",
+ br->name, name);
+ return false;
+ } else if (iface_from_ofp_port(br, ofp_port)) {
+ VLOG_WARN("bridge %s: interface %"PRIu16" reported twice",
+ br->name, ofp_port);
+ return false;
+ }
+
+ /* There's a configured interface named 'name'. */
+ if (strcmp(type, iface->type)
+ || iface_set_netdev_config(iface->cfg, iface->netdev)) {
+ /* It's the wrong type, or it's the right type but can't be
+ * configured as the user requested, so we must destroy it. */
+ return false;
+ } else {
+ /* It's the right type and configured correctly. Keep it. */
+ iface_set_ofp_port(iface, ofp_port);
+ return true;
+ }
+ } else if (bridge_has_bond_fake_iface(br, name)
+ && !strcmp(type, "internal")) {
+ /* It's a bond fake iface. Keep it. */
+ return true;
+ } else {
+ /* There's no configured interface named 'name', but there might be an
+ * interface of that name queued to be created.
+ *
+ * If there is, and it has the correct type, then try to configure it
+ * and add it. If that's successful, we'll keep it. Otherwise, we'll
+ * delete it and later try to re-add it. */
+ struct if_cfg *if_cfg = if_cfg_lookup(br, name);
+ return (if_cfg
+ && !strcmp(type, iface_get_type(if_cfg->cfg, br->cfg))
+ && iface_create(br, if_cfg, ofp_port));
+ }