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 188