src/network/networkd-vxlan.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4     This file is part of systemd.
   5
   6     Copyright 2014 Susant Sahani <susant@redhat.com>
   7
   8     systemd is free software; you can redistribute it and/or modify it
   9     under the terms of the GNU Lesser General Public License as published by
  10     the Free Software Foundation; either version 2.1 of the License, or
  11     (at your option) any later version.
  12
  13     systemd is distributed in the hope that it will be useful, but
  14     WITHOUT ANY WARRANTY; without even the implied warranty of
  15     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16     Lesser General Public License for more details.
  17
  18     You should have received a copy of the GNU Lesser General Public License
  19     along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <netinet/ether.h>
  23 #include <arpa/inet.h>
  24 #include <net/if.h>
  25
  26 #include "sd-rtnl.h"
  27 #include "networkd.h"
  28
  29
  30 static int netdev_fill_vxlan_rtnl_message(NetDev *netdev, Link *link, sd_rtnl_message *m) {
  31         int r;
  32
  33         assert(link);
  34         assert(link->network);
  35         assert(m);
  36
  37         r = sd_rtnl_message_append_string(m, IFLA_IFNAME, netdev->ifname);
  38         if (r < 0) {
  39                 log_error_netdev(netdev,
  40                                  "Could not append IFLA_IFNAME, attribute: %s",
  41                                  strerror(-r));
  42                 return r;
  43         }
  44
  45         r = sd_rtnl_message_open_container(m, IFLA_LINKINFO);
  46         if (r < 0) {
  47                 log_error_netdev(netdev,
  48                                  "Could not append IFLA_LINKINFO attribute: %s",
  49                                  strerror(-r));
  50                 return r;
  51         }
  52
  53         r = sd_rtnl_message_open_container_union(m, IFLA_INFO_DATA,
  54                                                  netdev_kind_to_string(netdev->kind));
  55         if (r < 0) {
  56                 log_error_netdev(netdev,
  57                                  "Could not append IFLA_INFO_DATA attribute: %s",
  58                                  strerror(-r));
  59                 return r;
  60         }
  61
  62         if (netdev->vlanid <= VXLAN_VID_MAX) {
  63                 r = sd_rtnl_message_append_u32(m, IFLA_VXLAN_ID, netdev->vxlanid);
  64                 if (r < 0) {
  65                         log_error_netdev(netdev,
  66                                          "Could not append IFLA_VXLAN_ID attribute: %s",
  67                                          strerror(-r));
  68                         return r;
  69                 }
  70         }
  71
  72         r = sd_rtnl_message_append_in_addr(m, IFLA_VXLAN_GROUP, &netdev->group);
  73         if (r < 0) {
  74                 log_error_netdev(netdev,
  75                                  "Could not append IFLA_VXLAN_GROUP attribute: %s",
  76                                  strerror(-r));
  77                 return r;
  78         }
  79
  80         r = sd_rtnl_message_append_u32(m, IFLA_VXLAN_LINK, link->ifindex);
  81         if (r < 0) {
  82                 log_error_netdev(netdev,
  83                                  "Could not append IFLA_VXLAN_LINK attribute: %s",
  84                                  strerror(-r));
  85                 return r;
  86         }
  87
  88         if(netdev->ttl) {
  89                 r = sd_rtnl_message_append_u8(m, IFLA_VXLAN_TTL, netdev->ttl);
  90                 if (r < 0) {
  91                         log_error_netdev(netdev,
  92                                          "Could not append IFLA_VXLAN_TTL attribute: %s",
  93                                          strerror(-r));
  94                         return r;
  95                 }
  96         }
  97
  98         if(netdev->tos) {
  99                 r = sd_rtnl_message_append_u8(m, IFLA_VXLAN_TOS, netdev->tos);
 100                 if (r < 0) {
 101                         log_error_netdev(netdev,
 102                                          "Could not append IFLA_VXLAN_TOS attribute: %s",
 103                                          strerror(-r));
 104                         return r;
 105                 }
 106         }
 107
 108         r = sd_rtnl_message_append_u8(m, IFLA_VXLAN_LEARNING, netdev->learning);
 109         if (r < 0) {
 110                 log_error_netdev(netdev,
 111                                  "Could not append IFLA_VXLAN_LEARNING attribute: %s",
 112                                  strerror(-r));
 113                 return r;
 114         }
 115
 116         r = sd_rtnl_message_close_container(m);
 117         if (r < 0) {
 118                 log_error_netdev(netdev,
 119                                  "Could not append IFLA_LINKINFO attribute: %s",
 120                                  strerror(-r));
 121                 return r;
 122         }
 123
 124         return r;
 125 }
 126
 127 int netdev_create_vxlan(NetDev *netdev, Link *link, sd_rtnl_message_handler_t callback) {
 128         _cleanup_rtnl_message_unref_ sd_rtnl_message *m = NULL;
 129         int r;
 130
 131         assert(netdev);
 132         assert(!(netdev->kind == NETDEV_KIND_VXLAN) || (link && callback));
 133         assert(netdev->ifname);
 134         assert(netdev->manager);
 135         assert(netdev->manager->rtnl);
 136
 137         r = sd_rtnl_message_new_link(netdev->manager->rtnl, &m, RTM_NEWLINK, 0);
 138         if (r < 0) {
 139                 log_error_netdev(netdev,
 140                                  "Could not allocate RTM_NEWLINK message: %s",
 141                                  strerror(-r));
 142                 return r;
 143         }
 144
 145         r = netdev_fill_vxlan_rtnl_message(netdev, link, m);
 146         if(r < 0)
 147                 return r;
 148
 149         r = sd_rtnl_call_async(netdev->manager->rtnl, m, callback, link, 0, NULL);
 150         if (r < 0) {
 151                 log_error_netdev(netdev,
 152                                  "Could not send rtnetlink message: %s", strerror(-r));
 153                 return r;
 154         }
 155
 156         log_debug_netdev(netdev, "Creating vxlan netdev: %s",
 157                          netdev_kind_to_string(netdev->kind));
 158
 159         netdev->state = NETDEV_STATE_CREATING;
 160
 161         return 0;
 162 }