src/network/networkd-wait-online-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 2014 Lennart Poettering
   7   Copyright 2014 Tom Gundersen
   8
   9   systemd is free software; you can redistribute it and/or modify it
  10   under the terms of the GNU Lesser General Public License as published by
  11   the Free Software Foundation; either version 2.1 of the License, or
  12   (at your option) any later version.
  13
  14   systemd is distributed in the hope that it will be useful, but
  15   WITHOUT ANY WARRANTY; without even the implied warranty of
  16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17   Lesser General Public License for more details.
  18
  19   You should have received a copy of the GNU Lesser General Public License
  20   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  21 ***/
  22
  23 #include <net/if.h>
  24
  25 #include "sd-network.h"
  26 #include "strv.h"
  27
  28 #include "networkd-wait-online-link.h"
  29
  30 int link_new(Manager *m, Link **ret, int ifindex, const char *ifname) {
  31         _cleanup_(link_freep) Link *l = NULL;
  32         int r;
  33
  34         assert(m);
  35         assert(ifindex > 0);
  36
  37         r = hashmap_ensure_allocated(&m->links, NULL);
  38         if (r < 0)
  39                 return r;
  40
  41         r = hashmap_ensure_allocated(&m->links_by_name, &string_hash_ops);
  42         if (r < 0)
  43                 return r;
  44
  45         l = new0(Link, 1);
  46         if (!l)
  47                 return -ENOMEM;
  48
  49         l->manager = m;
  50
  51         l->ifname = strdup(ifname);
  52         if (!l->ifname)
  53                 return -ENOMEM;
  54
  55         r = hashmap_put(m->links_by_name, l->ifname, l);
  56         if (r < 0)
  57                 return r;
  58
  59         l->ifindex = ifindex;
  60
  61         r = hashmap_put(m->links, INT_TO_PTR(ifindex), l);
  62         if (r < 0)
  63                 return r;
  64
  65         if (ret)
  66                 *ret = l;
  67         l = NULL;
  68
  69         return 0;
  70 }
  71
  72 Link *link_free(Link *l) {
  73
  74         if (!l)
  75                 return NULL;
  76
  77         if (l->manager) {
  78                 hashmap_remove(l->manager->links, INT_TO_PTR(l->ifindex));
  79                 hashmap_remove(l->manager->links_by_name, l->ifname);
  80         }
  81
  82         free(l->ifname);
  83         free(l);
  84         return NULL;
  85  }
  86
  87 int link_update_rtnl(Link *l, sd_rtnl_message *m) {
  88         const char *ifname;
  89         int r;
  90
  91         assert(l);
  92         assert(l->manager);
  93         assert(m);
  94
  95         r = sd_rtnl_message_link_get_flags(m, &l->flags);
  96         if (r < 0)
  97                 return r;
  98
  99         r = sd_rtnl_message_read_string(m, IFLA_IFNAME, &ifname);
 100         if (r < 0)
 101                 return r;
 102
 103         if (!streq(l->ifname, ifname)) {
 104                 char *new_ifname;
 105
 106                 new_ifname = strdup(ifname);
 107                 if (!new_ifname)
 108                         return -ENOMEM;
 109
 110                 hashmap_remove(l->manager->links_by_name, l->ifname);
 111                 free(l->ifname);
 112                 l->ifname = new_ifname;
 113
 114                 r = hashmap_put(l->manager->links_by_name, l->ifname, l);
 115                 if (r < 0)
 116                         return r;
 117         }
 118
 119         return 0;
 120 }
 121
 122 int link_update_monitor(Link *l) {
 123         assert(l);
 124
 125         free(l->operational_state);
 126         l->operational_state = NULL;
 127
 128         sd_network_link_get_operational_state(l->ifindex, &l->operational_state);
 129
 130         free(l->state);
 131         l->state = NULL;
 132
 133         sd_network_link_get_setup_state(l->ifindex, &l->state);
 134
 135         return 0;
 136 }
 137
 138 bool link_relevant(Link *l) {
 139         assert(l);
 140
 141         if (l->flags & IFF_LOOPBACK)
 142                 return false;
 143
 144         return true;
 145 }