blob: ac9bdf8f80a63360a9b5bec6069a6222e17db881 [file] [log] [blame]
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +02001/* Copyright (C) 2009-2012 B.A.T.M.A.N. contributors:
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +00002 *
3 * Marek Lindner, Simon Wunderlich
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of version 2 of the GNU General Public
7 * License as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
17 * 02110-1301, USA
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000018 */
19
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000020#include "main.h"
21#include "originator.h"
22#include "hash.h"
23#include "translation-table.h"
24#include "routing.h"
25#include "gateway_client.h"
26#include "hard-interface.h"
27#include "unicast.h"
28#include "soft-interface.h"
Simon Wunderlich23721382012-01-22 20:00:19 +010029#include "bridge_loop_avoidance.h"
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000030
Sven Eckelmann03fc7f82012-05-12 18:34:00 +020031static void batadv_purge_orig(struct work_struct *work);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000032
Sven Eckelmann56303d32012-06-05 22:31:31 +020033static void batadv_start_purge_timer(struct batadv_priv *bat_priv)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000034{
Sven Eckelmann03fc7f82012-05-12 18:34:00 +020035 INIT_DELAYED_WORK(&bat_priv->orig_work, batadv_purge_orig);
Sven Eckelmann3193e8f2012-05-12 02:09:42 +020036 queue_delayed_work(batadv_event_workqueue,
Marek Lindner0b0094e2012-03-01 15:35:20 +080037 &bat_priv->orig_work, msecs_to_jiffies(1000));
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000038}
39
Sven Eckelmannb8e2dd12011-06-15 15:08:59 +020040/* returns 1 if they are the same originator */
Sven Eckelmann03fc7f82012-05-12 18:34:00 +020041static int batadv_compare_orig(const struct hlist_node *node, const void *data2)
Sven Eckelmannb8e2dd12011-06-15 15:08:59 +020042{
Sven Eckelmann56303d32012-06-05 22:31:31 +020043 const void *data1 = container_of(node, struct batadv_orig_node,
44 hash_entry);
Sven Eckelmannb8e2dd12011-06-15 15:08:59 +020045
46 return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0);
47}
48
Sven Eckelmann56303d32012-06-05 22:31:31 +020049int batadv_originator_init(struct batadv_priv *bat_priv)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000050{
51 if (bat_priv->orig_hash)
Sven Eckelmann5346c352012-05-05 13:27:28 +020052 return 0;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000053
Sven Eckelmann1a8eaf02012-05-12 02:09:32 +020054 bat_priv->orig_hash = batadv_hash_new(1024);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000055
56 if (!bat_priv->orig_hash)
57 goto err;
58
Sven Eckelmann03fc7f82012-05-12 18:34:00 +020059 batadv_start_purge_timer(bat_priv);
Sven Eckelmann5346c352012-05-05 13:27:28 +020060 return 0;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000061
62err:
Sven Eckelmann5346c352012-05-05 13:27:28 +020063 return -ENOMEM;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000064}
65
Sven Eckelmann56303d32012-06-05 22:31:31 +020066void batadv_neigh_node_free_ref(struct batadv_neigh_node *neigh_node)
Simon Wunderlicha4c135c2011-01-19 20:01:43 +000067{
Marek Lindner44524fc2011-02-10 14:33:53 +000068 if (atomic_dec_and_test(&neigh_node->refcount))
Paul E. McKenneyae179ae2011-05-01 23:27:50 -070069 kfree_rcu(neigh_node, rcu);
Simon Wunderlicha4c135c2011-01-19 20:01:43 +000070}
71
Linus Lüssinge1a5382f2011-03-14 22:43:37 +000072/* increases the refcounter of a found router */
Sven Eckelmann56303d32012-06-05 22:31:31 +020073struct batadv_neigh_node *
74batadv_orig_node_get_router(struct batadv_orig_node *orig_node)
Linus Lüssinge1a5382f2011-03-14 22:43:37 +000075{
Sven Eckelmann56303d32012-06-05 22:31:31 +020076 struct batadv_neigh_node *router;
Linus Lüssinge1a5382f2011-03-14 22:43:37 +000077
78 rcu_read_lock();
79 router = rcu_dereference(orig_node->router);
80
81 if (router && !atomic_inc_not_zero(&router->refcount))
82 router = NULL;
83
84 rcu_read_unlock();
85 return router;
86}
87
Sven Eckelmann56303d32012-06-05 22:31:31 +020088struct batadv_neigh_node *
89batadv_neigh_node_new(struct batadv_hard_iface *hard_iface,
90 const uint8_t *neigh_addr, uint32_t seqno)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000091{
Sven Eckelmann56303d32012-06-05 22:31:31 +020092 struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
93 struct batadv_neigh_node *neigh_node;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000094
Sven Eckelmann704509b2011-05-14 23:14:54 +020095 neigh_node = kzalloc(sizeof(*neigh_node), GFP_ATOMIC);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000096 if (!neigh_node)
Marek Lindner7ae8b282012-03-01 15:35:21 +080097 goto out;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000098
Marek Lindner9591a792010-12-12 21:57:11 +000099 INIT_HLIST_NODE(&neigh_node->list);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000100
Marek Lindner7ae8b282012-03-01 15:35:21 +0800101 memcpy(neigh_node->addr, neigh_addr, ETH_ALEN);
Marek Lindnere3b0d0d2012-03-17 15:28:32 +0800102 spin_lock_init(&neigh_node->lq_update_lock);
Marek Lindner1605d0d2011-02-18 12:28:11 +0000103
104 /* extra reference for return */
105 atomic_set(&neigh_node->refcount, 2);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000106
Sven Eckelmann39c75a52012-06-03 22:19:22 +0200107 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
Sven Eckelmann1eda58b2012-05-12 13:48:58 +0200108 "Creating new neighbor %pM, initial seqno %d\n",
109 neigh_addr, seqno);
Marek Lindner7ae8b282012-03-01 15:35:21 +0800110
111out:
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000112 return neigh_node;
113}
114
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200115static void batadv_orig_node_free_rcu(struct rcu_head *rcu)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000116{
Marek Lindner9591a792010-12-12 21:57:11 +0000117 struct hlist_node *node, *node_tmp;
Sven Eckelmann56303d32012-06-05 22:31:31 +0200118 struct batadv_neigh_node *neigh_node, *tmp_neigh_node;
119 struct batadv_orig_node *orig_node;
Marek Lindner16b1aba2011-01-19 20:01:42 +0000120
Sven Eckelmann56303d32012-06-05 22:31:31 +0200121 orig_node = container_of(rcu, struct batadv_orig_node, rcu);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000122
Marek Lindnerf987ed62010-12-12 21:57:12 +0000123 spin_lock_bh(&orig_node->neigh_list_lock);
124
Simon Wunderlicha4c135c2011-01-19 20:01:43 +0000125 /* for all bonding members ... */
126 list_for_each_entry_safe(neigh_node, tmp_neigh_node,
127 &orig_node->bond_list, bonding_list) {
128 list_del_rcu(&neigh_node->bonding_list);
Sven Eckelmann7d211ef2012-05-12 02:09:34 +0200129 batadv_neigh_node_free_ref(neigh_node);
Simon Wunderlicha4c135c2011-01-19 20:01:43 +0000130 }
131
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000132 /* for all neighbors towards this originator ... */
Marek Lindner9591a792010-12-12 21:57:11 +0000133 hlist_for_each_entry_safe(neigh_node, node, node_tmp,
134 &orig_node->neigh_list, list) {
Marek Lindnerf987ed62010-12-12 21:57:12 +0000135 hlist_del_rcu(&neigh_node->list);
Sven Eckelmann7d211ef2012-05-12 02:09:34 +0200136 batadv_neigh_node_free_ref(neigh_node);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000137 }
138
Marek Lindnerf987ed62010-12-12 21:57:12 +0000139 spin_unlock_bh(&orig_node->neigh_list_lock);
140
Sven Eckelmann88ed1e772012-05-12 02:09:40 +0200141 batadv_frag_list_free(&orig_node->frag_list);
Sven Eckelmann08c36d32012-05-12 02:09:39 +0200142 batadv_tt_global_del_orig(orig_node->bat_priv, orig_node,
143 "originator timed out");
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000144
Antonio Quartullia73105b2011-04-27 14:27:44 +0200145 kfree(orig_node->tt_buff);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000146 kfree(orig_node->bcast_own);
147 kfree(orig_node->bcast_own_sum);
148 kfree(orig_node);
149}
150
Sven Eckelmann56303d32012-06-05 22:31:31 +0200151void batadv_orig_node_free_ref(struct batadv_orig_node *orig_node)
Marek Lindner7b36e8e2011-02-18 12:28:10 +0000152{
153 if (atomic_dec_and_test(&orig_node->refcount))
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200154 call_rcu(&orig_node->rcu, batadv_orig_node_free_rcu);
Marek Lindner7b36e8e2011-02-18 12:28:10 +0000155}
156
Sven Eckelmann56303d32012-06-05 22:31:31 +0200157void batadv_originator_free(struct batadv_priv *bat_priv)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000158{
Sven Eckelmann5bf74e92012-06-05 22:31:28 +0200159 struct batadv_hashtable *hash = bat_priv->orig_hash;
Marek Lindner7aadf882011-02-18 12:28:09 +0000160 struct hlist_node *node, *node_tmp;
Marek Lindner16b1aba2011-01-19 20:01:42 +0000161 struct hlist_head *head;
Marek Lindner16b1aba2011-01-19 20:01:42 +0000162 spinlock_t *list_lock; /* spinlock to protect write access */
Sven Eckelmann56303d32012-06-05 22:31:31 +0200163 struct batadv_orig_node *orig_node;
Antonio Quartullic90681b2011-10-05 17:05:25 +0200164 uint32_t i;
Marek Lindner16b1aba2011-01-19 20:01:42 +0000165
166 if (!hash)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000167 return;
168
169 cancel_delayed_work_sync(&bat_priv->orig_work);
170
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000171 bat_priv->orig_hash = NULL;
Marek Lindner16b1aba2011-01-19 20:01:42 +0000172
173 for (i = 0; i < hash->size; i++) {
174 head = &hash->table[i];
175 list_lock = &hash->list_locks[i];
176
177 spin_lock_bh(list_lock);
Marek Lindner7aadf882011-02-18 12:28:09 +0000178 hlist_for_each_entry_safe(orig_node, node, node_tmp,
179 head, hash_entry) {
Marek Lindner16b1aba2011-01-19 20:01:42 +0000180
Marek Lindner7aadf882011-02-18 12:28:09 +0000181 hlist_del_rcu(node);
Sven Eckelmann7d211ef2012-05-12 02:09:34 +0200182 batadv_orig_node_free_ref(orig_node);
Marek Lindner16b1aba2011-01-19 20:01:42 +0000183 }
184 spin_unlock_bh(list_lock);
185 }
186
Sven Eckelmann1a8eaf02012-05-12 02:09:32 +0200187 batadv_hash_destroy(hash);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000188}
189
190/* this function finds or creates an originator entry for the given
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +0200191 * address if it does not exits
192 */
Sven Eckelmann56303d32012-06-05 22:31:31 +0200193struct batadv_orig_node *batadv_get_orig_node(struct batadv_priv *bat_priv,
194 const uint8_t *addr)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000195{
Sven Eckelmann56303d32012-06-05 22:31:31 +0200196 struct batadv_orig_node *orig_node;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000197 int size;
198 int hash_added;
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200199 unsigned long reset_time;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000200
Sven Eckelmannda641192012-05-12 13:48:56 +0200201 orig_node = batadv_orig_hash_find(bat_priv, addr);
Marek Lindner7aadf882011-02-18 12:28:09 +0000202 if (orig_node)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000203 return orig_node;
204
Sven Eckelmann39c75a52012-06-03 22:19:22 +0200205 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
206 "Creating new originator: %pM\n", addr);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000207
Sven Eckelmann704509b2011-05-14 23:14:54 +0200208 orig_node = kzalloc(sizeof(*orig_node), GFP_ATOMIC);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000209 if (!orig_node)
210 return NULL;
211
Marek Lindner9591a792010-12-12 21:57:11 +0000212 INIT_HLIST_HEAD(&orig_node->neigh_list);
Simon Wunderlicha4c135c2011-01-19 20:01:43 +0000213 INIT_LIST_HEAD(&orig_node->bond_list);
Marek Lindner2ae2daf2011-01-19 20:01:42 +0000214 spin_lock_init(&orig_node->ogm_cnt_lock);
Marek Lindnerf3e00082011-01-25 21:52:11 +0000215 spin_lock_init(&orig_node->bcast_seqno_lock);
Marek Lindnerf987ed62010-12-12 21:57:12 +0000216 spin_lock_init(&orig_node->neigh_list_lock);
Antonio Quartullia73105b2011-04-27 14:27:44 +0200217 spin_lock_init(&orig_node->tt_buff_lock);
Marek Lindner7b36e8e2011-02-18 12:28:10 +0000218
219 /* extra reference for return */
220 atomic_set(&orig_node->refcount, 2);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000221
Antonio Quartulli17071572011-11-07 16:36:40 +0100222 orig_node->tt_initialised = false;
Antonio Quartullicc47f662011-04-27 14:27:57 +0200223 orig_node->tt_poss_change = false;
Marek Lindner16b1aba2011-01-19 20:01:42 +0000224 orig_node->bat_priv = bat_priv;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000225 memcpy(orig_node->orig, addr, ETH_ALEN);
226 orig_node->router = NULL;
Antonio Quartullic8c991b2011-07-07 01:40:57 +0200227 orig_node->tt_crc = 0;
228 atomic_set(&orig_node->last_ttvn, 0);
Antonio Quartulli2dafb492011-05-05 08:42:45 +0200229 orig_node->tt_buff = NULL;
Antonio Quartullia73105b2011-04-27 14:27:44 +0200230 orig_node->tt_buff_len = 0;
231 atomic_set(&orig_node->tt_size, 0);
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200232 reset_time = jiffies - 1 - msecs_to_jiffies(BATADV_RESET_PROTECTION_MS);
233 orig_node->bcast_seqno_reset = reset_time;
234 orig_node->batman_seqno_reset = reset_time;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000235
Simon Wunderlicha4c135c2011-01-19 20:01:43 +0000236 atomic_set(&orig_node->bond_candidates, 0);
237
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200238 size = bat_priv->num_ifaces * sizeof(unsigned long) * BATADV_NUM_WORDS;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000239
240 orig_node->bcast_own = kzalloc(size, GFP_ATOMIC);
241 if (!orig_node->bcast_own)
242 goto free_orig_node;
243
244 size = bat_priv->num_ifaces * sizeof(uint8_t);
245 orig_node->bcast_own_sum = kzalloc(size, GFP_ATOMIC);
246
247 INIT_LIST_HEAD(&orig_node->frag_list);
248 orig_node->last_frag_packet = 0;
249
250 if (!orig_node->bcast_own_sum)
251 goto free_bcast_own;
252
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200253 hash_added = batadv_hash_add(bat_priv->orig_hash, batadv_compare_orig,
Sven Eckelmannda641192012-05-12 13:48:56 +0200254 batadv_choose_orig, orig_node,
Sven Eckelmannc0a55922012-05-12 13:48:55 +0200255 &orig_node->hash_entry);
Antonio Quartulli1a1f37d2011-07-10 00:36:36 +0200256 if (hash_added != 0)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000257 goto free_bcast_own_sum;
258
259 return orig_node;
260free_bcast_own_sum:
261 kfree(orig_node->bcast_own_sum);
262free_bcast_own:
263 kfree(orig_node->bcast_own);
264free_orig_node:
265 kfree(orig_node);
266 return NULL;
267}
268
Sven Eckelmann56303d32012-06-05 22:31:31 +0200269static bool
270batadv_purge_orig_neighbors(struct batadv_priv *bat_priv,
271 struct batadv_orig_node *orig_node,
272 struct batadv_neigh_node **best_neigh_node)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000273{
Marek Lindner9591a792010-12-12 21:57:11 +0000274 struct hlist_node *node, *node_tmp;
Sven Eckelmann56303d32012-06-05 22:31:31 +0200275 struct batadv_neigh_node *neigh_node;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000276 bool neigh_purged = false;
Marek Lindner0b0094e2012-03-01 15:35:20 +0800277 unsigned long last_seen;
Sven Eckelmann56303d32012-06-05 22:31:31 +0200278 struct batadv_hard_iface *if_incoming;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000279
280 *best_neigh_node = NULL;
281
Marek Lindnerf987ed62010-12-12 21:57:12 +0000282 spin_lock_bh(&orig_node->neigh_list_lock);
283
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000284 /* for all neighbors towards this originator ... */
Marek Lindner9591a792010-12-12 21:57:11 +0000285 hlist_for_each_entry_safe(neigh_node, node, node_tmp,
286 &orig_node->neigh_list, list) {
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000287
Sven Eckelmann1eda58b2012-05-12 13:48:58 +0200288 last_seen = neigh_node->last_seen;
289 if_incoming = neigh_node->if_incoming;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000290
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200291 if ((batadv_has_timed_out(last_seen, BATADV_PURGE_TIMEOUT)) ||
Sven Eckelmanne9a4f292012-06-03 22:19:19 +0200292 (if_incoming->if_status == BATADV_IF_INACTIVE) ||
293 (if_incoming->if_status == BATADV_IF_NOT_IN_USE) ||
294 (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) {
Marek Lindner0b0094e2012-03-01 15:35:20 +0800295
Sven Eckelmanne9a4f292012-06-03 22:19:19 +0200296 if ((if_incoming->if_status == BATADV_IF_INACTIVE) ||
297 (if_incoming->if_status == BATADV_IF_NOT_IN_USE) ||
298 (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED))
Sven Eckelmann39c75a52012-06-03 22:19:22 +0200299 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
Sven Eckelmann1eda58b2012-05-12 13:48:58 +0200300 "neighbor purge: originator %pM, neighbor: %pM, iface: %s\n",
301 orig_node->orig, neigh_node->addr,
302 if_incoming->net_dev->name);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000303 else
Sven Eckelmann39c75a52012-06-03 22:19:22 +0200304 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
Sven Eckelmann1eda58b2012-05-12 13:48:58 +0200305 "neighbor timeout: originator %pM, neighbor: %pM, last_seen: %u\n",
306 orig_node->orig, neigh_node->addr,
307 jiffies_to_msecs(last_seen));
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000308
309 neigh_purged = true;
Marek Lindner9591a792010-12-12 21:57:11 +0000310
Marek Lindnerf987ed62010-12-12 21:57:12 +0000311 hlist_del_rcu(&neigh_node->list);
Sven Eckelmann30d3c512012-05-12 02:09:36 +0200312 batadv_bonding_candidate_del(orig_node, neigh_node);
Sven Eckelmann7d211ef2012-05-12 02:09:34 +0200313 batadv_neigh_node_free_ref(neigh_node);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000314 } else {
315 if ((!*best_neigh_node) ||
316 (neigh_node->tq_avg > (*best_neigh_node)->tq_avg))
317 *best_neigh_node = neigh_node;
318 }
319 }
Marek Lindnerf987ed62010-12-12 21:57:12 +0000320
321 spin_unlock_bh(&orig_node->neigh_list_lock);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000322 return neigh_purged;
323}
324
Sven Eckelmann56303d32012-06-05 22:31:31 +0200325static bool batadv_purge_orig_node(struct batadv_priv *bat_priv,
326 struct batadv_orig_node *orig_node)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000327{
Sven Eckelmann56303d32012-06-05 22:31:31 +0200328 struct batadv_neigh_node *best_neigh_node;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000329
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200330 if (batadv_has_timed_out(orig_node->last_seen,
331 2 * BATADV_PURGE_TIMEOUT)) {
Sven Eckelmann39c75a52012-06-03 22:19:22 +0200332 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
Sven Eckelmann1eda58b2012-05-12 13:48:58 +0200333 "Originator timeout: originator %pM, last_seen %u\n",
334 orig_node->orig,
335 jiffies_to_msecs(orig_node->last_seen));
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000336 return true;
337 } else {
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200338 if (batadv_purge_orig_neighbors(bat_priv, orig_node,
339 &best_neigh_node))
Sven Eckelmann30d3c512012-05-12 02:09:36 +0200340 batadv_update_route(bat_priv, orig_node,
341 best_neigh_node);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000342 }
343
344 return false;
345}
346
Sven Eckelmann56303d32012-06-05 22:31:31 +0200347static void _batadv_purge_orig(struct batadv_priv *bat_priv)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000348{
Sven Eckelmann5bf74e92012-06-05 22:31:28 +0200349 struct batadv_hashtable *hash = bat_priv->orig_hash;
Marek Lindner7aadf882011-02-18 12:28:09 +0000350 struct hlist_node *node, *node_tmp;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000351 struct hlist_head *head;
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000352 spinlock_t *list_lock; /* spinlock to protect write access */
Sven Eckelmann56303d32012-06-05 22:31:31 +0200353 struct batadv_orig_node *orig_node;
Antonio Quartullic90681b2011-10-05 17:05:25 +0200354 uint32_t i;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000355
356 if (!hash)
357 return;
358
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000359 /* for all origins... */
360 for (i = 0; i < hash->size; i++) {
361 head = &hash->table[i];
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000362 list_lock = &hash->list_locks[i];
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000363
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000364 spin_lock_bh(list_lock);
Marek Lindner7aadf882011-02-18 12:28:09 +0000365 hlist_for_each_entry_safe(orig_node, node, node_tmp,
366 head, hash_entry) {
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200367 if (batadv_purge_orig_node(bat_priv, orig_node)) {
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000368 if (orig_node->gw_flags)
Sven Eckelmann7cf06bc2012-05-12 02:09:29 +0200369 batadv_gw_node_delete(bat_priv,
370 orig_node);
Marek Lindner7aadf882011-02-18 12:28:09 +0000371 hlist_del_rcu(node);
Sven Eckelmann7d211ef2012-05-12 02:09:34 +0200372 batadv_orig_node_free_ref(orig_node);
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000373 continue;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000374 }
375
Sven Eckelmann1eda58b2012-05-12 13:48:58 +0200376 if (batadv_has_timed_out(orig_node->last_frag_packet,
Sven Eckelmann4d5d2db82012-06-03 22:19:15 +0200377 BATADV_FRAG_TIMEOUT))
Sven Eckelmann88ed1e772012-05-12 02:09:40 +0200378 batadv_frag_list_free(&orig_node->frag_list);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000379 }
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000380 spin_unlock_bh(list_lock);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000381 }
382
Sven Eckelmann7cf06bc2012-05-12 02:09:29 +0200383 batadv_gw_node_purge(bat_priv);
384 batadv_gw_election(bat_priv);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000385}
386
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200387static void batadv_purge_orig(struct work_struct *work)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000388{
Sven Eckelmann56303d32012-06-05 22:31:31 +0200389 struct delayed_work *delayed_work;
390 struct batadv_priv *bat_priv;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000391
Sven Eckelmann56303d32012-06-05 22:31:31 +0200392 delayed_work = container_of(work, struct delayed_work, work);
393 bat_priv = container_of(delayed_work, struct batadv_priv, orig_work);
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200394 _batadv_purge_orig(bat_priv);
395 batadv_start_purge_timer(bat_priv);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000396}
397
Sven Eckelmann56303d32012-06-05 22:31:31 +0200398void batadv_purge_orig_ref(struct batadv_priv *bat_priv)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000399{
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200400 _batadv_purge_orig(bat_priv);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000401}
402
Sven Eckelmann7d211ef2012-05-12 02:09:34 +0200403int batadv_orig_seq_print_text(struct seq_file *seq, void *offset)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000404{
405 struct net_device *net_dev = (struct net_device *)seq->private;
Sven Eckelmann56303d32012-06-05 22:31:31 +0200406 struct batadv_priv *bat_priv = netdev_priv(net_dev);
Sven Eckelmann5bf74e92012-06-05 22:31:28 +0200407 struct batadv_hashtable *hash = bat_priv->orig_hash;
Marek Lindner7aadf882011-02-18 12:28:09 +0000408 struct hlist_node *node, *node_tmp;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000409 struct hlist_head *head;
Sven Eckelmann56303d32012-06-05 22:31:31 +0200410 struct batadv_hard_iface *primary_if;
411 struct batadv_orig_node *orig_node;
412 struct batadv_neigh_node *neigh_node, *neigh_node_tmp;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000413 int batman_count = 0;
414 int last_seen_secs;
415 int last_seen_msecs;
Sven Eckelmann0aca2362012-06-19 20:26:30 +0200416 unsigned long last_seen_jiffies;
Antonio Quartullic90681b2011-10-05 17:05:25 +0200417 uint32_t i;
418 int ret = 0;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000419
Sven Eckelmanne5d89252012-05-12 13:48:54 +0200420 primary_if = batadv_primary_if_get_selected(bat_priv);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000421
Marek Lindner32ae9b22011-04-20 15:40:58 +0200422 if (!primary_if) {
Sven Eckelmann86ceb362012-03-07 09:07:45 +0100423 ret = seq_printf(seq,
424 "BATMAN mesh %s disabled - please specify interfaces to enable it\n",
Marek Lindner32ae9b22011-04-20 15:40:58 +0200425 net_dev->name);
426 goto out;
427 }
428
Sven Eckelmanne9a4f292012-06-03 22:19:19 +0200429 if (primary_if->if_status != BATADV_IF_ACTIVE) {
Sven Eckelmann86ceb362012-03-07 09:07:45 +0100430 ret = seq_printf(seq,
431 "BATMAN mesh %s disabled - primary interface not active\n",
Marek Lindner32ae9b22011-04-20 15:40:58 +0200432 net_dev->name);
433 goto out;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000434 }
435
Sven Eckelmann44c43492011-07-05 10:42:51 +0200436 seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s)]\n",
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200437 BATADV_SOURCE_VERSION, primary_if->net_dev->name,
Marek Lindner32ae9b22011-04-20 15:40:58 +0200438 primary_if->net_dev->dev_addr, net_dev->name);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000439 seq_printf(seq, " %-15s %s (%s/%i) %17s [%10s]: %20s ...\n",
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200440 "Originator", "last-seen", "#", BATADV_TQ_MAX_VALUE,
441 "Nexthop", "outgoingIF", "Potential nexthops");
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000442
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000443 for (i = 0; i < hash->size; i++) {
444 head = &hash->table[i];
445
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000446 rcu_read_lock();
Marek Lindner7aadf882011-02-18 12:28:09 +0000447 hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
Sven Eckelmann7d211ef2012-05-12 02:09:34 +0200448 neigh_node = batadv_orig_node_get_router(orig_node);
Linus Lüssinge1a5382f2011-03-14 22:43:37 +0000449 if (!neigh_node)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000450 continue;
451
Linus Lüssinge1a5382f2011-03-14 22:43:37 +0000452 if (neigh_node->tq_avg == 0)
453 goto next;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000454
Sven Eckelmann0aca2362012-06-19 20:26:30 +0200455 last_seen_jiffies = jiffies - orig_node->last_seen;
456 last_seen_msecs = jiffies_to_msecs(last_seen_jiffies);
457 last_seen_secs = last_seen_msecs / 1000;
458 last_seen_msecs = last_seen_msecs % 1000;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000459
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000460 seq_printf(seq, "%pM %4i.%03is (%3i) %pM [%10s]:",
461 orig_node->orig, last_seen_secs,
462 last_seen_msecs, neigh_node->tq_avg,
463 neigh_node->addr,
464 neigh_node->if_incoming->net_dev->name);
465
Linus Lüssinge1a5382f2011-03-14 22:43:37 +0000466 hlist_for_each_entry_rcu(neigh_node_tmp, node_tmp,
Marek Lindnerf987ed62010-12-12 21:57:12 +0000467 &orig_node->neigh_list, list) {
Linus Lüssinge1a5382f2011-03-14 22:43:37 +0000468 seq_printf(seq, " %pM (%3i)",
469 neigh_node_tmp->addr,
470 neigh_node_tmp->tq_avg);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000471 }
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000472
473 seq_printf(seq, "\n");
474 batman_count++;
Linus Lüssinge1a5382f2011-03-14 22:43:37 +0000475
476next:
Sven Eckelmann7d211ef2012-05-12 02:09:34 +0200477 batadv_neigh_node_free_ref(neigh_node);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000478 }
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000479 rcu_read_unlock();
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000480 }
481
Linus Lüssinge1a5382f2011-03-14 22:43:37 +0000482 if (batman_count == 0)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000483 seq_printf(seq, "No batman nodes in range ...\n");
484
Marek Lindner32ae9b22011-04-20 15:40:58 +0200485out:
486 if (primary_if)
Sven Eckelmanne5d89252012-05-12 13:48:54 +0200487 batadv_hardif_free_ref(primary_if);
Marek Lindner32ae9b22011-04-20 15:40:58 +0200488 return ret;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000489}
490
Sven Eckelmann56303d32012-06-05 22:31:31 +0200491static int batadv_orig_node_add_if(struct batadv_orig_node *orig_node,
492 int max_if_num)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000493{
494 void *data_ptr;
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200495 size_t data_size, old_size;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000496
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200497 data_size = max_if_num * sizeof(unsigned long) * BATADV_NUM_WORDS;
498 old_size = (max_if_num - 1) * sizeof(unsigned long) * BATADV_NUM_WORDS;
499 data_ptr = kmalloc(data_size, GFP_ATOMIC);
Joe Perches320f4222011-08-29 14:17:24 -0700500 if (!data_ptr)
Sven Eckelmann5346c352012-05-05 13:27:28 +0200501 return -ENOMEM;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000502
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200503 memcpy(data_ptr, orig_node->bcast_own, old_size);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000504 kfree(orig_node->bcast_own);
505 orig_node->bcast_own = data_ptr;
506
507 data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC);
Joe Perches320f4222011-08-29 14:17:24 -0700508 if (!data_ptr)
Sven Eckelmann5346c352012-05-05 13:27:28 +0200509 return -ENOMEM;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000510
511 memcpy(data_ptr, orig_node->bcast_own_sum,
512 (max_if_num - 1) * sizeof(uint8_t));
513 kfree(orig_node->bcast_own_sum);
514 orig_node->bcast_own_sum = data_ptr;
515
516 return 0;
517}
518
Sven Eckelmann56303d32012-06-05 22:31:31 +0200519int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface,
520 int max_if_num)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000521{
Sven Eckelmann56303d32012-06-05 22:31:31 +0200522 struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
Sven Eckelmann5bf74e92012-06-05 22:31:28 +0200523 struct batadv_hashtable *hash = bat_priv->orig_hash;
Marek Lindner7aadf882011-02-18 12:28:09 +0000524 struct hlist_node *node;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000525 struct hlist_head *head;
Sven Eckelmann56303d32012-06-05 22:31:31 +0200526 struct batadv_orig_node *orig_node;
Antonio Quartullic90681b2011-10-05 17:05:25 +0200527 uint32_t i;
528 int ret;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000529
530 /* resize all orig nodes because orig_node->bcast_own(_sum) depend on
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +0200531 * if_num
532 */
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000533 for (i = 0; i < hash->size; i++) {
534 head = &hash->table[i];
535
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000536 rcu_read_lock();
Marek Lindner7aadf882011-02-18 12:28:09 +0000537 hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
Marek Lindner2ae2daf2011-01-19 20:01:42 +0000538 spin_lock_bh(&orig_node->ogm_cnt_lock);
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200539 ret = batadv_orig_node_add_if(orig_node, max_if_num);
Marek Lindner2ae2daf2011-01-19 20:01:42 +0000540 spin_unlock_bh(&orig_node->ogm_cnt_lock);
541
Sven Eckelmann5346c352012-05-05 13:27:28 +0200542 if (ret == -ENOMEM)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000543 goto err;
544 }
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000545 rcu_read_unlock();
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000546 }
547
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000548 return 0;
549
550err:
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000551 rcu_read_unlock();
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000552 return -ENOMEM;
553}
554
Sven Eckelmann56303d32012-06-05 22:31:31 +0200555static int batadv_orig_node_del_if(struct batadv_orig_node *orig_node,
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200556 int max_if_num, int del_if_num)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000557{
558 void *data_ptr = NULL;
559 int chunk_size;
560
561 /* last interface was removed */
562 if (max_if_num == 0)
563 goto free_bcast_own;
564
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200565 chunk_size = sizeof(unsigned long) * BATADV_NUM_WORDS;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000566 data_ptr = kmalloc(max_if_num * chunk_size, GFP_ATOMIC);
Joe Perches320f4222011-08-29 14:17:24 -0700567 if (!data_ptr)
Sven Eckelmann5346c352012-05-05 13:27:28 +0200568 return -ENOMEM;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000569
570 /* copy first part */
571 memcpy(data_ptr, orig_node->bcast_own, del_if_num * chunk_size);
572
573 /* copy second part */
Sven Eckelmann38e3c5f2011-05-14 23:14:49 +0200574 memcpy((char *)data_ptr + del_if_num * chunk_size,
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000575 orig_node->bcast_own + ((del_if_num + 1) * chunk_size),
576 (max_if_num - del_if_num) * chunk_size);
577
578free_bcast_own:
579 kfree(orig_node->bcast_own);
580 orig_node->bcast_own = data_ptr;
581
582 if (max_if_num == 0)
583 goto free_own_sum;
584
585 data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC);
Joe Perches320f4222011-08-29 14:17:24 -0700586 if (!data_ptr)
Sven Eckelmann5346c352012-05-05 13:27:28 +0200587 return -ENOMEM;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000588
589 memcpy(data_ptr, orig_node->bcast_own_sum,
590 del_if_num * sizeof(uint8_t));
591
Sven Eckelmann38e3c5f2011-05-14 23:14:49 +0200592 memcpy((char *)data_ptr + del_if_num * sizeof(uint8_t),
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000593 orig_node->bcast_own_sum + ((del_if_num + 1) * sizeof(uint8_t)),
594 (max_if_num - del_if_num) * sizeof(uint8_t));
595
596free_own_sum:
597 kfree(orig_node->bcast_own_sum);
598 orig_node->bcast_own_sum = data_ptr;
599
600 return 0;
601}
602
Sven Eckelmann56303d32012-06-05 22:31:31 +0200603int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface,
604 int max_if_num)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000605{
Sven Eckelmann56303d32012-06-05 22:31:31 +0200606 struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
Sven Eckelmann5bf74e92012-06-05 22:31:28 +0200607 struct batadv_hashtable *hash = bat_priv->orig_hash;
Marek Lindner7aadf882011-02-18 12:28:09 +0000608 struct hlist_node *node;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000609 struct hlist_head *head;
Sven Eckelmann56303d32012-06-05 22:31:31 +0200610 struct batadv_hard_iface *hard_iface_tmp;
611 struct batadv_orig_node *orig_node;
Antonio Quartullic90681b2011-10-05 17:05:25 +0200612 uint32_t i;
613 int ret;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000614
615 /* resize all orig nodes because orig_node->bcast_own(_sum) depend on
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +0200616 * if_num
617 */
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000618 for (i = 0; i < hash->size; i++) {
619 head = &hash->table[i];
620
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000621 rcu_read_lock();
Marek Lindner7aadf882011-02-18 12:28:09 +0000622 hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
Marek Lindner2ae2daf2011-01-19 20:01:42 +0000623 spin_lock_bh(&orig_node->ogm_cnt_lock);
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200624 ret = batadv_orig_node_del_if(orig_node, max_if_num,
625 hard_iface->if_num);
Marek Lindner2ae2daf2011-01-19 20:01:42 +0000626 spin_unlock_bh(&orig_node->ogm_cnt_lock);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000627
Sven Eckelmann5346c352012-05-05 13:27:28 +0200628 if (ret == -ENOMEM)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000629 goto err;
630 }
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000631 rcu_read_unlock();
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000632 }
633
634 /* renumber remaining batman interfaces _inside_ of orig_hash_lock */
635 rcu_read_lock();
Sven Eckelmann3193e8f2012-05-12 02:09:42 +0200636 list_for_each_entry_rcu(hard_iface_tmp, &batadv_hardif_list, list) {
Sven Eckelmanne9a4f292012-06-03 22:19:19 +0200637 if (hard_iface_tmp->if_status == BATADV_IF_NOT_IN_USE)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000638 continue;
639
Marek Lindnere6c10f42011-02-18 12:33:20 +0000640 if (hard_iface == hard_iface_tmp)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000641 continue;
642
Marek Lindnere6c10f42011-02-18 12:33:20 +0000643 if (hard_iface->soft_iface != hard_iface_tmp->soft_iface)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000644 continue;
645
Marek Lindnere6c10f42011-02-18 12:33:20 +0000646 if (hard_iface_tmp->if_num > hard_iface->if_num)
647 hard_iface_tmp->if_num--;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000648 }
649 rcu_read_unlock();
650
Marek Lindnere6c10f42011-02-18 12:33:20 +0000651 hard_iface->if_num = -1;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000652 return 0;
653
654err:
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000655 rcu_read_unlock();
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000656 return -ENOMEM;
657}