networkd: netdev - move to separate subdirectory

This could (and should) be made into a separate daemon, at least move
the sourcefiles out for now.

src/network/netdev/veth.c

@@ -0,0 +1,111 @@
+/***
+    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 <net/if.h>
+#include <linux/veth.h>
+
+#include "sd-netlink.h"
+
+#include "netdev/veth.h"
+
+static int netdev_veth_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
+        Veth *v;
+        int r;
+
+        assert(netdev);
+        assert(!link);
+        assert(m);
+
+        v = VETH(netdev);
+
+        assert(v);
+
+        r = sd_netlink_message_open_container(m, VETH_INFO_PEER);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append VETH_INFO_PEER attribute: %m");
+
+        if (v->ifname_peer) {
+                r = sd_netlink_message_append_string(m, IFLA_IFNAME, v->ifname_peer);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to add netlink interface name: %m");
+        }
+
+        if (v->mac_peer) {
+                r = sd_netlink_message_append_ether_addr(m, IFLA_ADDRESS, v->mac_peer);
+                if (r < 0)
+                        return log_netdev_error_errno(netdev, r, "Could not append IFLA_ADDRESS attribute: %m");
+        }
+
+        r = sd_netlink_message_close_container(m);
+        if (r < 0)
+                return log_netdev_error_errno(netdev, r, "Could not append IFLA_INFO_DATA attribute: %m");
+
+        return r;
+}
+
+static int netdev_veth_verify(NetDev *netdev, const char *filename) {
+        Veth *v;
+        int r;
+
+        assert(netdev);
+        assert(filename);
+
+        v = VETH(netdev);
+
+        assert(v);
+
+        if (!v->ifname_peer) {
+                log_warning("Veth NetDev without peer name configured in %s. Ignoring",
+                            filename);
+                return -EINVAL;
+        }
+
+        if (!v->mac_peer) {
+                r = netdev_get_mac(v->ifname_peer, &v->mac_peer);
+                if (r < 0) {
+                        log_warning("Failed to generate predictable MAC address for %s. Ignoring",
+                                  v->ifname_peer);
+                        return -EINVAL;
+                }
+        }
+
+        return 0;
+}
+
+static void veth_done(NetDev *n) {
+        Veth *v;
+
+        assert(n);
+
+        v = VETH(n);
+
+        assert(v);
+
+        free(v->ifname_peer);
+        free(v->mac_peer);
+}
+
+const NetDevVTable veth_vtable = {
+        .object_size = sizeof(Veth),
+        .sections = "Match\0NetDev\0Peer\0",
+        .done = veth_done,
+        .fill_message_create = netdev_veth_fill_message_create,
+        .create_type = NETDEV_CREATE_INDEPENDENT,
+        .config_verify = netdev_veth_verify,
+};