src/network/netdev/vxcan.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2017 Susant Sahani
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include "netdev/vxcan.h"
  21 #include "missing.h"
  22
  23 static int netdev_vxcan_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) {
  24         VxCan *v;
  25         int r;
  26
  27         assert(netdev);
  28         assert(!link);
  29         assert(m);
  30
  31         v = VXCAN(netdev);
  32
  33         assert(v);
  34
  35         r = sd_netlink_message_open_container(m, VXCAN_INFO_PEER);
  36         if (r < 0)
  37                 return log_netdev_error_errno(netdev, r, "Could not append VXCAN_INFO_PEER attribute: %m");
  38
  39         if (v->ifname_peer) {
  40                 r = sd_netlink_message_append_string(m, IFLA_IFNAME, v->ifname_peer);
  41                 if (r < 0)
  42                         return log_error_errno(r, "Failed to add vxcan netlink interface peer name: %m");
  43         }
  44
  45         r = sd_netlink_message_close_container(m);
  46         if (r < 0)
  47                 return log_netdev_error_errno(netdev, r, "Could not append VXCAN_INFO_PEER attribute: %m");
  48
  49         return r;
  50 }
  51
  52 static int netdev_vxcan_verify(NetDev *netdev, const char *filename) {
  53         VxCan *v;
  54
  55         assert(netdev);
  56         assert(filename);
  57
  58         v = VXCAN(netdev);
  59
  60         assert(v);
  61
  62         if (!v->ifname_peer) {
  63                 log_warning("VxCan NetDev without peer name configured in %s. Ignoring", filename);
  64                 return -EINVAL;
  65         }
  66
  67         return 0;
  68 }
  69
  70 static void vxcan_done(NetDev *n) {
  71         VxCan *v;
  72
  73         assert(n);
  74
  75         v = VXCAN(n);
  76
  77         assert(v);
  78
  79         free(v->ifname_peer);
  80 }
  81
  82 const NetDevVTable vxcan_vtable = {
  83         .object_size = sizeof(VxCan),
  84         .sections = "Match\0NetDev\0VXCAN\0",
  85         .done = vxcan_done,
  86         .fill_message_create = netdev_vxcan_fill_message_create,
  87         .create_type = NETDEV_CREATE_INDEPENDENT,
  88         .config_verify = netdev_vxcan_verify,
  89 };