+ /* Figure out vswitchd bridge and VLAN. */
+ cfg_read();
+ if (bridge_exists(linux_bridge)) {
+ /* Bridge name is the same. We are interested in VLAN 0. */
+ ovs_bridge = xstrdup(linux_bridge);
+ br_vlan = 0;
+ } else {
+ /* No such Open vSwitch bridge 'linux_bridge', but there might be an
+ * internal port named 'linux_bridge' on some other bridge
+ * 'ovs_bridge'. If so then we are interested in the VLAN assigned to
+ * port 'linux_bridge' on the bridge named 'ovs_bridge'. */
+ const char *port_name = linux_bridge;
+
+ ovs_bridge = get_bridge_containing_port(port_name);
+ br_vlan = cfg_get_vlan(0, "vlan.%s.tag", port_name);
+ if (!ovs_bridge || br_vlan < 0) {
+ free(ovs_bridge);
+ send_reply(seq, ENODEV, NULL);
+ return error;
+ }
+ }
+