ipv4: Remove flowi from struct rtable.
[linux-3.10.git] / 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 if_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(&if_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->orig_hash_lock);
83         spin_lock_init(&bat_priv->forw_bat_list_lock);
84         spin_lock_init(&bat_priv->forw_bcast_list_lock);
85         spin_lock_init(&bat_priv->hna_lhash_lock);
86         spin_lock_init(&bat_priv->hna_ghash_lock);
87         spin_lock_init(&bat_priv->gw_list_lock);
88         spin_lock_init(&bat_priv->vis_hash_lock);
89         spin_lock_init(&bat_priv->vis_list_lock);
90         spin_lock_init(&bat_priv->softif_neigh_lock);
91
92         INIT_HLIST_HEAD(&bat_priv->forw_bat_list);
93         INIT_HLIST_HEAD(&bat_priv->forw_bcast_list);
94         INIT_HLIST_HEAD(&bat_priv->gw_list);
95         INIT_HLIST_HEAD(&bat_priv->softif_neigh_list);
96
97         if (originator_init(bat_priv) < 1)
98                 goto err;
99
100         if (hna_local_init(bat_priv) < 1)
101                 goto err;
102
103         if (hna_global_init(bat_priv) < 1)
104                 goto err;
105
106         hna_local_add(soft_iface, soft_iface->dev_addr);
107
108         if (vis_init(bat_priv) < 1)
109                 goto err;
110
111         atomic_set(&bat_priv->mesh_state, MESH_ACTIVE);
112         goto end;
113
114 err:
115         pr_err("Unable to allocate memory for mesh information structures: "
116                "out of mem ?\n");
117         mesh_free(soft_iface);
118         return -1;
119
120 end:
121         return 0;
122 }
123
124 void mesh_free(struct net_device *soft_iface)
125 {
126         struct bat_priv *bat_priv = netdev_priv(soft_iface);
127
128         atomic_set(&bat_priv->mesh_state, MESH_DEACTIVATING);
129
130         purge_outstanding_packets(bat_priv, NULL);
131
132         vis_quit(bat_priv);
133
134         gw_node_purge(bat_priv);
135         originator_free(bat_priv);
136
137         hna_local_free(bat_priv);
138         hna_global_free(bat_priv);
139
140         softif_neigh_purge(bat_priv);
141
142         atomic_set(&bat_priv->mesh_state, MESH_INACTIVE);
143 }
144
145 void inc_module_count(void)
146 {
147         try_module_get(THIS_MODULE);
148 }
149
150 void dec_module_count(void)
151 {
152         module_put(THIS_MODULE);
153 }
154
155 int is_my_mac(uint8_t *addr)
156 {
157         struct batman_if *batman_if;
158
159         rcu_read_lock();
160         list_for_each_entry_rcu(batman_if, &if_list, list) {
161                 if (batman_if->if_status != IF_ACTIVE)
162                         continue;
163
164                 if (compare_orig(batman_if->net_dev->dev_addr, addr)) {
165                         rcu_read_unlock();
166                         return 1;
167                 }
168         }
169         rcu_read_unlock();
170         return 0;
171
172 }
173
174 module_init(batman_init);
175 module_exit(batman_exit);
176
177 MODULE_LICENSE("GPL");
178
179 MODULE_AUTHOR(DRIVER_AUTHOR);
180 MODULE_DESCRIPTION(DRIVER_DESC);
181 MODULE_SUPPORTED_DEVICE(DRIVER_DEVICE);
182 #ifdef REVISION_VERSION
183 MODULE_VERSION(SOURCE_VERSION "-" REVISION_VERSION);
184 #else
185 MODULE_VERSION(SOURCE_VERSION);
186 #endif