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 "types.h"
  34 #include "vis.h"
  35 #include "hash.h"
  36
  37 struct list_head if_list;
  38
  39 unsigned char broadcast_addr[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
  40
  41 struct workqueue_struct *bat_event_workqueue;
  42
  43 static int __init batman_init(void)
  44 {
  45         INIT_LIST_HEAD(&if_list);
  46
  47         /* the name should not be longer than 10 chars - see
  48          * http://lwn.net/Articles/23634/ */
  49         bat_event_workqueue = create_singlethread_workqueue("bat_events");
  50
  51         if (!bat_event_workqueue)
  52                 return -ENOMEM;
  53
  54         bat_socket_init();
  55         debugfs_init();
  56
  57         register_netdevice_notifier(&hard_if_notifier);
  58
  59         pr_info("B.A.T.M.A.N. advanced %s%s (compatibility version %i) "
  60                 "loaded\n", SOURCE_VERSION, REVISION_VERSION_STR,
  61                 COMPAT_VERSION);
  62
  63         return 0;
  64 }
  65
  66 static void __exit batman_exit(void)
  67 {
  68         debugfs_destroy();
  69         unregister_netdevice_notifier(&hard_if_notifier);
  70         hardif_remove_interfaces();
  71
  72         flush_workqueue(bat_event_workqueue);
  73         destroy_workqueue(bat_event_workqueue);
  74         bat_event_workqueue = NULL;
  75
  76         rcu_barrier();
  77 }
  78
  79 int mesh_init(struct net_device *soft_iface)
  80 {
  81         struct bat_priv *bat_priv = netdev_priv(soft_iface);
  82
  83         spin_lock_init(&bat_priv->orig_hash_lock);
  84         spin_lock_init(&bat_priv->forw_bat_list_lock);
  85         spin_lock_init(&bat_priv->forw_bcast_list_lock);
  86         spin_lock_init(&bat_priv->hna_lhash_lock);
  87         spin_lock_init(&bat_priv->hna_ghash_lock);
  88         spin_lock_init(&bat_priv->gw_list_lock);
  89         spin_lock_init(&bat_priv->vis_hash_lock);
  90         spin_lock_init(&bat_priv->vis_list_lock);
  91         spin_lock_init(&bat_priv->softif_neigh_lock);
  92
  93         INIT_HLIST_HEAD(&bat_priv->forw_bat_list);
  94         INIT_HLIST_HEAD(&bat_priv->forw_bcast_list);
  95         INIT_HLIST_HEAD(&bat_priv->gw_list);
  96         INIT_HLIST_HEAD(&bat_priv->softif_neigh_list);
  97
  98         if (originator_init(bat_priv) < 1)
  99                 goto err;
 100
 101         if (hna_local_init(bat_priv) < 1)
 102                 goto err;
 103
 104         if (hna_global_init(bat_priv) < 1)
 105                 goto err;
 106
 107         hna_local_add(soft_iface, soft_iface->dev_addr);
 108
 109         if (vis_init(bat_priv) < 1)
 110                 goto err;
 111
 112         atomic_set(&bat_priv->mesh_state, MESH_ACTIVE);
 113         goto end;
 114
 115 err:
 116         pr_err("Unable to allocate memory for mesh information structures: "
 117                "out of mem ?\n");
 118         mesh_free(soft_iface);
 119         return -1;
 120
 121 end:
 122         return 0;
 123 }
 124
 125 void mesh_free(struct net_device *soft_iface)
 126 {
 127         struct bat_priv *bat_priv = netdev_priv(soft_iface);
 128
 129         atomic_set(&bat_priv->mesh_state, MESH_DEACTIVATING);
 130
 131         purge_outstanding_packets(bat_priv, NULL);
 132
 133         vis_quit(bat_priv);
 134
 135         gw_node_purge(bat_priv);
 136         originator_free(bat_priv);
 137
 138         hna_local_free(bat_priv);
 139         hna_global_free(bat_priv);
 140
 141         softif_neigh_purge(bat_priv);
 142
 143         atomic_set(&bat_priv->mesh_state, MESH_INACTIVE);
 144 }
 145
 146 void inc_module_count(void)
 147 {
 148         try_module_get(THIS_MODULE);
 149 }
 150
 151 void dec_module_count(void)
 152 {
 153         module_put(THIS_MODULE);
 154 }
 155
 156 int is_my_mac(uint8_t *addr)
 157 {
 158         struct batman_if *batman_if;
 159
 160         rcu_read_lock();
 161         list_for_each_entry_rcu(batman_if, &if_list, list) {
 162                 if (batman_if->if_status != IF_ACTIVE)
 163                         continue;
 164
 165                 if (compare_orig(batman_if->net_dev->dev_addr, addr)) {
 166                         rcu_read_unlock();
 167                         return 1;
 168                 }
 169         }
 170         rcu_read_unlock();
 171         return 0;
 172
 173 }
 174
 175 module_init(batman_init);
 176 module_exit(batman_exit);
 177
 178 MODULE_LICENSE("GPL");
 179
 180 MODULE_AUTHOR(DRIVER_AUTHOR);
 181 MODULE_DESCRIPTION(DRIVER_DESC);
 182 MODULE_SUPPORTED_DEVICE(DRIVER_DEVICE);
 183 #ifdef REVISION_VERSION
 184 MODULE_VERSION(SOURCE_VERSION "-" REVISION_VERSION);
 185 #else
 186 MODULE_VERSION(SOURCE_VERSION);
 187 #endif