src/network/networkd-link.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2013 Tom Gundersen <teg@jklm.no>
   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 <linux/if.h>
  24
  25 #include "networkd.h"
  26 #include "libudev-private.h"
  27 #include "util.h"
  28
  29 int link_new(Manager *manager, struct udev_device *device, Link **ret) {
  30         _cleanup_link_free_ Link *link = NULL;
  31         uint64_t ifindex;
  32         int r;
  33
  34         assert(device);
  35         assert(ret);
  36
  37         link = new0(Link, 1);
  38         if (!link)
  39                 return -ENOMEM;
  40
  41         ifindex = udev_device_get_ifindex(device);
  42         if (ifindex <= 0)
  43                 return -EINVAL;
  44
  45         link->ifindex = ifindex;
  46         link->manager = manager;
  47
  48         r = hashmap_put(manager->links, &ifindex, link);
  49         if (r < 0)
  50                 return r;
  51
  52         *ret = link;
  53         link = NULL;
  54
  55         return 0;
  56 }
  57
  58 void link_free(Link *link) {
  59         if (!link)
  60                 return;
  61
  62         network_free(link->network);
  63
  64         hashmap_remove(link->manager->links, link);
  65
  66         free(link);
  67 }
  68
  69 int link_add(Manager *m, struct udev_device *device) {
  70         Link *link;
  71         Network *network;
  72         int r;
  73         uint64_t ifindex;
  74
  75         assert(m);
  76         assert(device);
  77
  78         ifindex = udev_device_get_ifindex(device);
  79         link = hashmap_get(m->links, &ifindex);
  80         if (link)
  81                 return 0;
  82
  83         r = link_new(m, device, &link);
  84         if (r < 0) {
  85                 log_error("could not create link: %s", strerror(-r));
  86                 return r;
  87         }
  88
  89         r = network_get(m, device, &network);
  90         if (r < 0)
  91                 return r == -ENOENT ? 0 : r;
  92
  93         r = network_apply(m, network, link);
  94         if (r < 0)
  95                 return r;
  96
  97         return 0;
  98 }
  99
 100 int link_up(Manager *manager, Link *link) {
 101         _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *req = NULL;
 102         int r;
 103
 104         r = sd_rtnl_message_link_new(RTM_NEWLINK, link->ifindex, 0, IFF_UP, &req);
 105         if (r < 0) {
 106                 log_error("Could not allocate RTM_NEWLINK message");
 107                 return r;
 108         }
 109
 110         r = sd_rtnl_send_with_reply_and_block(manager->rtnl, req, 0, NULL);
 111         if (r < 0) {
 112                 log_error("Could not UP link: %s", strerror(-r));
 113                 return r;
 114         }
 115
 116         log_info("Link is UP");
 117
 118         return 0;
 119 }