networkd: netdev - introduce vtable for netdev kinds

[elogind.git] / src / network / networkd-netdev-veth.c

diff --git a/src/network/networkd-netdev-veth.c b/src/network/networkd-netdev-veth.c
new file mode 100644 (file)
index 0000000..aca8022
--- /dev/null
+++ b/src/network/networkd-netdev-veth.c
@@ -0,0 +1,143 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+    This file is part of systemd.
+
+    Copyright 2014 Susant Sahani <susant@redhat.com>
+
+    systemd is free software; you can redistribute it and/or modify it
+    under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation; either version 2.1 of the License, or
+    (at your option) any later version.
+
+    systemd is distributed in the hope that it will be useful, but
+    WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <netinet/ether.h>
+#include <arpa/inet.h>
+#include <net/if.h>
+#include <linux/veth.h>
+
+#include "sd-rtnl.h"
+#include "networkd-netdev-veth.h"
+
+static int netdev_veth_fill_message_create(NetDev *netdev, sd_rtnl_message *m) {
+        int r;
+
+        assert(netdev);
+        assert(netdev->ifname);
+        assert(m);
+
+        r = sd_rtnl_message_append_string(m, IFLA_IFNAME, netdev->ifname);
+        if (r < 0) {
+                log_error_netdev(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_error_netdev(netdev,
+                                         "Colud not append IFLA_ADDRESS attribute: %s",
+                                         strerror(-r));
+                    return r;
+                }
+        }
+
+        r = sd_rtnl_message_open_container(m, IFLA_LINKINFO);
+        if (r < 0) {
+                log_error_netdev(netdev,
+                                 "Could not append IFLA_LINKINFO attribute: %s",
+                                 strerror(-r));
+                return r;
+        }
+
+        r = sd_rtnl_message_open_container_union(m, IFLA_INFO_DATA, "veth");
+        if (r < 0) {
+                log_error_netdev(netdev,
+                                 "Could not append IFLA_INFO_DATA attribute: %s",
+                                 strerror(-r));
+                return r;
+        }
+
+        r = sd_rtnl_message_open_container(m, VETH_INFO_PEER);
+        if (r < 0) {
+                log_error_netdev(netdev,
+                                 "Could not append IFLA_IPTUN_LINK attribute: %s",
+                                 strerror(-r));
+                return r;
+        }
+
+        if (netdev->ifname_peer) {
+                r = sd_rtnl_message_append_string(m, IFLA_IFNAME, netdev->ifname_peer);
+                if (r < 0) {
+                        log_error("Failed to add netlink interface name: %s", strerror(-r));
+                        return r;
+                }
+        }
+
+        if (netdev->mac_peer) {
+                r = sd_rtnl_message_append_ether_addr(m, IFLA_ADDRESS, netdev->mac_peer);
+                if (r < 0) {
+                        log_error_netdev(netdev,
+                                         "Colud not append IFLA_ADDRESS attribute: %s",
+                                         strerror(-r));
+                    return r;
+                }
+        }
+
+        r = sd_rtnl_message_close_container(m);
+        if (r < 0) {
+                log_error_netdev(netdev,
+                                 "Could not append IFLA_INFO_DATA attribute: %s",
+                                 strerror(-r));
+                return r;
+        }
+
+        r = sd_rtnl_message_close_container(m);
+        if (r < 0) {
+                log_error_netdev(netdev,
+                                 "Could not append IFLA_LINKINFO attribute: %s",
+                                 strerror(-r));
+                return r;
+        }
+
+        return r;
+}
+
+static int netdev_veth_verify(NetDev *netdev, const char *filename) {
+        int r;
+
+        assert(netdev);
+        assert(filename);
+
+        if (!netdev->ifname_peer) {
+                log_warning("Veth NetDev without peer name configured in %s. Ignoring",
+                            filename);
+                return -EINVAL;
+        }
+
+        if (!netdev->mac_peer) {
+                r = netdev_get_mac(netdev->ifname_peer, &netdev->mac_peer);
+                if (r < 0) {
+                        log_warning("Failed to generate predictable MAC address for %s. Ignoring",
+                                  netdev->ifname_peer);
+                        return -EINVAL;
+                }
+        }
+
+        return 0;
+}
+
+const NetDevVTable veth_vtable = {
+        .fill_message_create = netdev_veth_fill_message_create,
+        .config_verify = netdev_veth_verify,
+};