net/batman-adv/main.c

   1 /*
   2  * Copyright (C) 2007-2011 B.A.T.M.A.N. contributors:
   3  *
   4  * Marek Lindner, Simon Wunderlich
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of version 2 of the GNU General Public
   8  * License as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  18  * 02110-1301, USA
  19  *
  20  */
  21
  22 #include "main.h"
  23 #include "bat_sysfs.h"
  24 #include "bat_debugfs.h"
  25 #include "routing.h"
  26 #include "send.h"
  27 #include "originator.h"
  28 #include "soft-interface.h"
  29 #include "icmp_socket.h"
  30 #include "translation-table.h"
  31 #include "hard-interface.h"
  32 #include "gateway_client.h"
  33 #include "vis.h"
  34 #include "hash.h"
  35
  36 struct list_head hardif_list;
  37
  38 unsigned char broadcast_addr[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
  39
  40 struct workqueue_struct *bat_event_workqueue;
  41
  42 static int __init batman_init(void)
  43 {
  44         INIT_LIST_HEAD(&hardif_list);
  45
  46         /* the name should not be longer than 10 chars - see
  47          * http://lwn.net/Articles/23634/ */
  48         bat_event_workqueue = create_singlethread_workqueue("bat_events");
  49
  50         if (!bat_event_workqueue)
  51                 return -ENOMEM;
  52
  53         bat_socket_init();
  54         debugfs_init();
  55
  56         register_netdevice_notifier(&hard_if_notifier);
  57
  58         pr_info("B.A.T.M.A.N. advanced %s%s (compatibility version %i) "
  59                 "loaded\n", SOURCE_VERSION, REVISION_VERSION_STR,
  60                 COMPAT_VERSION);
  61
  62         return 0;
  63 }
  64
  65 static void __exit batman_exit(void)
  66 {
  67         debugfs_destroy();
  68         unregister_netdevice_notifier(&hard_if_notifier);
  69         hardif_remove_interfaces();
  70
  71         flush_workqueue(bat_event_workqueue);
  72         destroy_workqueue(bat_event_workqueue);
  73         bat_event_workqueue = NULL;
  74
  75         rcu_barrier();
  76 }
  77
  78 int mesh_init(struct net_device *soft_iface)
  79 {
  80         struct bat_priv *bat_priv = netdev_priv(soft_iface);
  81
  82         spin_lock_init(&bat_priv->forw_bat_list_lock);
  83         spin_lock_init(&bat_priv->forw_bcast_list_lock);
  84         spin_lock_init(&bat_priv->hna_lhash_lock);
  85         spin_lock_init(&bat_priv->hna_ghash_lock);
  86         spin_lock_init(&bat_priv->gw_list_lock);
  87         spin_lock_init(&bat_priv->vis_hash_lock);
  88         spin_lock_init(&bat_priv->vis_list_lock);
  89         spin_lock_init(&bat_priv->softif_neigh_lock);
  90
  91         INIT_HLIST_HEAD(&bat_priv->forw_bat_list);
  92         INIT_HLIST_HEAD(&bat_priv->forw_bcast_list);
  93         INIT_HLIST_HEAD(&bat_priv->gw_list);
  94         INIT_HLIST_HEAD(&bat_priv->softif_neigh_list);
  95
  96         if (originator_init(bat_priv) < 1)
  97                 goto err;
  98
  99         if (hna_local_init(bat_priv) < 1)
 100                 goto err;
 101
 102         if (hna_global_init(bat_priv) < 1)
 103                 goto err;
 104
 105         hna_local_add(soft_iface, soft_iface->dev_addr);
 106
 107         if (vis_init(bat_priv) < 1)
 108                 goto err;
 109
 110         atomic_set(&bat_priv->mesh_state, MESH_ACTIVE);
 111         goto end;
 112
 113 err:
 114         pr_err("Unable to allocate memory for mesh information structures: "
 115                "out of mem ?\n");
 116         mesh_free(soft_iface);
 117         return -1;
 118
 119 end:
 120         return 0;
 121 }
 122
 123 void mesh_free(struct net_device *soft_iface)
 124 {
 125         struct bat_priv *bat_priv = netdev_priv(soft_iface);
 126
 127         atomic_set(&bat_priv->mesh_state, MESH_DEACTIVATING);
 128
 129         purge_outstanding_packets(bat_priv, NULL);
 130
 131         vis_quit(bat_priv);
 132
 133         gw_node_purge(bat_priv);
 134         originator_free(bat_priv);
 135
 136         hna_local_free(bat_priv);
 137         hna_global_free(bat_priv);
 138
 139         softif_neigh_purge(bat_priv);
 140
 141         atomic_set(&bat_priv->mesh_state, MESH_INACTIVE);
 142 }
 143
 144 void inc_module_count(void)
 145 {
 146         try_module_get(THIS_MODULE);
 147 }
 148
 149 void dec_module_count(void)
 150 {
 151         module_put(THIS_MODULE);
 152 }
 153
 154 int is_my_mac(uint8_t *addr)
 155 {
 156         struct hard_iface *hard_iface;
 157
 158         rcu_read_lock();
 159         list_for_each_entry_rcu(hard_iface, &hardif_list, list) {
 160                 if (hard_iface->if_status != IF_ACTIVE)
 161                         continue;
 162
 163                 if (compare_eth(hard_iface->net_dev->dev_addr, addr)) {
 164                         rcu_read_unlock();
 165                         return 1;
 166                 }
 167         }
 168         rcu_read_unlock();
 169         return 0;
 170
 171 }
 172
 173 module_init(batman_init);
 174 module_exit(batman_exit);
 175
 176 MODULE_LICENSE("GPL");
 177
 178 MODULE_AUTHOR(DRIVER_AUTHOR);
 179 MODULE_DESCRIPTION(DRIVER_DESC);
 180 MODULE_SUPPORTED_DEVICE(DRIVER_DEVICE);
 181 #ifdef REVISION_VERSION
 182 MODULE_VERSION(SOURCE_VERSION "-" REVISION_VERSION);
 183 #else
 184 MODULE_VERSION(SOURCE_VERSION);
 185 #endif