+static int netdev_create(NetDev *netdev, Link *link,
+ sd_rtnl_message_handler_t callback) {
+ int r;
+
+ assert(netdev);
+ assert(!link || callback);
+
+ /* create netdev */
+ if (NETDEV_VTABLE(netdev)->create) {
+ assert(!link);
+
+ r = NETDEV_VTABLE(netdev)->create(netdev);
+ if (r < 0)
+ return r;
+
+ log_netdev_debug(netdev, "created");
+ } else {
+ _cleanup_rtnl_message_unref_ sd_rtnl_message *m = NULL;
+
+ r = sd_rtnl_message_new_link(netdev->manager->rtnl, &m, RTM_NEWLINK, 0);
+ if (r < 0) {
+ log_netdev_error(netdev,
+ "Could not allocate RTM_NEWLINK message: %s",
+ strerror(-r));
+ return r;
+ }
+
+ r = sd_rtnl_message_append_string(m, IFLA_IFNAME, netdev->ifname);
+ if (r < 0) {
+ log_netdev_error(netdev,
+ "Could not append IFLA_IFNAME, attribute: %s",
+ strerror(-r));
+ return r;
+ }
+
+ if (netdev->mac) {
+ r = sd_rtnl_message_append_ether_addr(m, IFLA_ADDRESS, netdev->mac);
+ if (r < 0) {
+ log_netdev_error(netdev,
+ "Could not append IFLA_ADDRESS attribute: %s",
+ strerror(-r));
+ return r;
+ }
+ }
+
+ if (netdev->mtu) {
+ r = sd_rtnl_message_append_u32(m, IFLA_MTU, netdev->mtu);
+ if (r < 0) {
+ log_netdev_error(netdev,
+ "Could not append IFLA_MTU attribute: %s",
+ strerror(-r));
+ return r;
+ }
+ }
+
+ if (link) {
+ r = sd_rtnl_message_append_u32(m, IFLA_LINK, link->ifindex);
+ if (r < 0) {
+ log_netdev_error(netdev,
+ "Colud not append IFLA_LINK attribute: %s",
+ strerror(-r));
+ return r;
+ }
+ }
+
+ r = sd_rtnl_message_open_container(m, IFLA_LINKINFO);
+ if (r < 0) {
+ log_netdev_error(netdev,
+ "Could not append IFLA_LINKINFO attribute: %s",
+ strerror(-r));
+ return r;
+ }
+
+ r = sd_rtnl_message_open_container_union(m, IFLA_INFO_DATA,
+ netdev_kind_to_string(netdev->kind));
+ if (r < 0) {
+ log_netdev_error(netdev,
+ "Could not append IFLA_INFO_DATA attribute: %s",
+ strerror(-r));
+ return r;
+ }
+
+ if (NETDEV_VTABLE(netdev)->fill_message_create) {
+ r = NETDEV_VTABLE(netdev)->fill_message_create(netdev, link, m);
+ if (r < 0)
+ return r;
+ }
+
+ r = sd_rtnl_message_close_container(m);
+ if (r < 0) {
+ log_netdev_error(netdev,
+ "Could not append IFLA_LINKINFO attribute: %s",
+ strerror(-r));
+ return r;
+ }
+
+ r = sd_rtnl_message_close_container(m);
+ if (r < 0) {
+ log_netdev_error(netdev,
+ "Could not append IFLA_LINKINFO attribute: %s",
+ strerror(-r));
+ return r;
+ }
+
+
+ if (link) {
+ r = sd_rtnl_call_async(netdev->manager->rtnl, m,
+ callback, link, 0, NULL);
+ if (r < 0) {
+ log_netdev_error(netdev,
+ "Could not send rtnetlink message: %s",
+ strerror(-r));
+ return r;
+ }
+
+ link_ref(link);
+ } else {
+ r = sd_rtnl_call_async(netdev->manager->rtnl, m,
+ netdev_create_handler, netdev, 0,
+ NULL);
+ if (r < 0) {
+ log_netdev_error(netdev,
+ "Could not send rtnetlink message: %s",
+ strerror(-r));
+ return r;
+ }
+
+ netdev_ref(netdev);
+ }
+
+ netdev->state = NETDEV_STATE_CREATING;
+
+ log_netdev_debug(netdev, "creating");
+ }
+
+ return 0;
+}
+
+/* the callback must be called, possibly after a timeout, as otherwise the Link will hang */
+int netdev_join(NetDev *netdev, Link *link, sd_rtnl_message_handler_t callback) {
+ int r;
+
+ assert(netdev);
+ assert(netdev->manager);
+ assert(netdev->manager->rtnl);
+ assert(NETDEV_VTABLE(netdev));
+
+ switch (NETDEV_VTABLE(netdev)->create_type) {
+ case NETDEV_CREATE_MASTER:
+ r = netdev_enslave(netdev, link, callback);
+ if (r < 0)
+ return r;
+
+ break;
+ case NETDEV_CREATE_STACKED:
+ r = netdev_create(netdev, link, callback);
+ if (r < 0)
+ return r;
+
+ break;
+ default:
+ assert_not_reached("Can not join independent netdev");
+ }
+
+ return 0;
+}
+