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Antonio Quartulli0b873932013-01-04 03:05:31 +01001/* Copyright (C) 2009-2013 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"
Antonio Quartulli785ea112011-11-23 11:35:44 +010021#include "distributed-arp-table.h"
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000022#include "originator.h"
23#include "hash.h"
24#include "translation-table.h"
25#include "routing.h"
26#include "gateway_client.h"
27#include "hard-interface.h"
28#include "unicast.h"
29#include "soft-interface.h"
Simon Wunderlich23721382012-01-22 20:00:19 +010030#include "bridge_loop_avoidance.h"
Martin Hundebølld56b1702013-01-25 11:12:39 +010031#include "network-coding.h"
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000032
Antonio Quartullidec05072012-11-10 11:00:32 +010033/* hash class keys */
34static struct lock_class_key batadv_orig_hash_lock_class_key;
35
Sven Eckelmann03fc7f82012-05-12 18:34:00 +020036static void batadv_purge_orig(struct work_struct *work);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000037
Sven Eckelmannb8e2dd12011-06-15 15:08:59 +020038/* returns 1 if they are the same originator */
Sven Eckelmann03fc7f82012-05-12 18:34:00 +020039static int batadv_compare_orig(const struct hlist_node *node, const void *data2)
Sven Eckelmannb8e2dd12011-06-15 15:08:59 +020040{
Sven Eckelmann56303d32012-06-05 22:31:31 +020041 const void *data1 = container_of(node, struct batadv_orig_node,
42 hash_entry);
Sven Eckelmannb8e2dd12011-06-15 15:08:59 +020043
44 return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0);
45}
46
Sven Eckelmann56303d32012-06-05 22:31:31 +020047int batadv_originator_init(struct batadv_priv *bat_priv)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000048{
49 if (bat_priv->orig_hash)
Sven Eckelmann5346c352012-05-05 13:27:28 +020050 return 0;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000051
Sven Eckelmann1a8eaf02012-05-12 02:09:32 +020052 bat_priv->orig_hash = batadv_hash_new(1024);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000053
54 if (!bat_priv->orig_hash)
55 goto err;
56
Antonio Quartullidec05072012-11-10 11:00:32 +010057 batadv_hash_set_lock_class(bat_priv->orig_hash,
58 &batadv_orig_hash_lock_class_key);
59
Antonio Quartulli72414442012-12-25 13:14:37 +010060 INIT_DELAYED_WORK(&bat_priv->orig_work, batadv_purge_orig);
61 queue_delayed_work(batadv_event_workqueue,
62 &bat_priv->orig_work,
63 msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD));
64
Sven Eckelmann5346c352012-05-05 13:27:28 +020065 return 0;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000066
67err:
Sven Eckelmann5346c352012-05-05 13:27:28 +020068 return -ENOMEM;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000069}
70
Sven Eckelmann56303d32012-06-05 22:31:31 +020071void batadv_neigh_node_free_ref(struct batadv_neigh_node *neigh_node)
Simon Wunderlicha4c135c2011-01-19 20:01:43 +000072{
Marek Lindner44524fc2011-02-10 14:33:53 +000073 if (atomic_dec_and_test(&neigh_node->refcount))
Paul E. McKenneyae179ae2011-05-01 23:27:50 -070074 kfree_rcu(neigh_node, rcu);
Simon Wunderlicha4c135c2011-01-19 20:01:43 +000075}
76
Linus Lüssinge1a5382f2011-03-14 22:43:37 +000077/* increases the refcounter of a found router */
Sven Eckelmann56303d32012-06-05 22:31:31 +020078struct batadv_neigh_node *
79batadv_orig_node_get_router(struct batadv_orig_node *orig_node)
Linus Lüssinge1a5382f2011-03-14 22:43:37 +000080{
Sven Eckelmann56303d32012-06-05 22:31:31 +020081 struct batadv_neigh_node *router;
Linus Lüssinge1a5382f2011-03-14 22:43:37 +000082
83 rcu_read_lock();
84 router = rcu_dereference(orig_node->router);
85
86 if (router && !atomic_inc_not_zero(&router->refcount))
87 router = NULL;
88
89 rcu_read_unlock();
90 return router;
91}
92
Sven Eckelmann56303d32012-06-05 22:31:31 +020093struct batadv_neigh_node *
94batadv_neigh_node_new(struct batadv_hard_iface *hard_iface,
95 const uint8_t *neigh_addr, uint32_t seqno)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000096{
Sven Eckelmann56303d32012-06-05 22:31:31 +020097 struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
98 struct batadv_neigh_node *neigh_node;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000099
Sven Eckelmann704509b2011-05-14 23:14:54 +0200100 neigh_node = kzalloc(sizeof(*neigh_node), GFP_ATOMIC);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000101 if (!neigh_node)
Marek Lindner7ae8b282012-03-01 15:35:21 +0800102 goto out;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000103
Marek Lindner9591a792010-12-12 21:57:11 +0000104 INIT_HLIST_NODE(&neigh_node->list);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000105
Marek Lindner7ae8b282012-03-01 15:35:21 +0800106 memcpy(neigh_node->addr, neigh_addr, ETH_ALEN);
Marek Lindnere3b0d0d2012-03-17 15:28:32 +0800107 spin_lock_init(&neigh_node->lq_update_lock);
Marek Lindner1605d0d2011-02-18 12:28:11 +0000108
109 /* extra reference for return */
110 atomic_set(&neigh_node->refcount, 2);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000111
Sven Eckelmann39c75a52012-06-03 22:19:22 +0200112 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
Sven Eckelmann1eda58b2012-05-12 13:48:58 +0200113 "Creating new neighbor %pM, initial seqno %d\n",
114 neigh_addr, seqno);
Marek Lindner7ae8b282012-03-01 15:35:21 +0800115
116out:
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000117 return neigh_node;
118}
119
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200120static void batadv_orig_node_free_rcu(struct rcu_head *rcu)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000121{
Sasha Levinb67bfe02013-02-27 17:06:00 -0800122 struct hlist_node *node_tmp;
Sven Eckelmann56303d32012-06-05 22:31:31 +0200123 struct batadv_neigh_node *neigh_node, *tmp_neigh_node;
124 struct batadv_orig_node *orig_node;
Marek Lindner16b1aba2011-01-19 20:01:42 +0000125
Sven Eckelmann56303d32012-06-05 22:31:31 +0200126 orig_node = container_of(rcu, struct batadv_orig_node, rcu);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000127
Marek Lindnerf987ed62010-12-12 21:57:12 +0000128 spin_lock_bh(&orig_node->neigh_list_lock);
129
Simon Wunderlicha4c135c2011-01-19 20:01:43 +0000130 /* for all bonding members ... */
131 list_for_each_entry_safe(neigh_node, tmp_neigh_node,
132 &orig_node->bond_list, bonding_list) {
133 list_del_rcu(&neigh_node->bonding_list);
Sven Eckelmann7d211ef2012-05-12 02:09:34 +0200134 batadv_neigh_node_free_ref(neigh_node);
Simon Wunderlicha4c135c2011-01-19 20:01:43 +0000135 }
136
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000137 /* for all neighbors towards this originator ... */
Sasha Levinb67bfe02013-02-27 17:06:00 -0800138 hlist_for_each_entry_safe(neigh_node, node_tmp,
Marek Lindner9591a792010-12-12 21:57:11 +0000139 &orig_node->neigh_list, list) {
Marek Lindnerf987ed62010-12-12 21:57:12 +0000140 hlist_del_rcu(&neigh_node->list);
Sven Eckelmann7d211ef2012-05-12 02:09:34 +0200141 batadv_neigh_node_free_ref(neigh_node);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000142 }
143
Marek Lindnerf987ed62010-12-12 21:57:12 +0000144 spin_unlock_bh(&orig_node->neigh_list_lock);
145
Martin Hundebølld56b1702013-01-25 11:12:39 +0100146 /* Free nc_nodes */
147 batadv_nc_purge_orig(orig_node->bat_priv, orig_node, NULL);
148
Sven Eckelmann88ed1e772012-05-12 02:09:40 +0200149 batadv_frag_list_free(&orig_node->frag_list);
Sven Eckelmann08c36d32012-05-12 02:09:39 +0200150 batadv_tt_global_del_orig(orig_node->bat_priv, orig_node,
151 "originator timed out");
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000152
Antonio Quartullia73105b2011-04-27 14:27:44 +0200153 kfree(orig_node->tt_buff);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000154 kfree(orig_node->bcast_own);
155 kfree(orig_node->bcast_own_sum);
156 kfree(orig_node);
157}
158
Linus Lüssing72822222013-04-15 21:43:29 +0800159/**
160 * batadv_orig_node_free_ref - decrement the orig node refcounter and possibly
161 * schedule an rcu callback for freeing it
162 * @orig_node: the orig node to free
163 */
Sven Eckelmann56303d32012-06-05 22:31:31 +0200164void batadv_orig_node_free_ref(struct batadv_orig_node *orig_node)
Marek Lindner7b36e8e2011-02-18 12:28:10 +0000165{
166 if (atomic_dec_and_test(&orig_node->refcount))
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200167 call_rcu(&orig_node->rcu, batadv_orig_node_free_rcu);
Marek Lindner7b36e8e2011-02-18 12:28:10 +0000168}
169
Linus Lüssing72822222013-04-15 21:43:29 +0800170/**
171 * batadv_orig_node_free_ref_now - decrement the orig node refcounter and
172 * possibly free it (without rcu callback)
173 * @orig_node: the orig node to free
174 */
175void batadv_orig_node_free_ref_now(struct batadv_orig_node *orig_node)
176{
177 if (atomic_dec_and_test(&orig_node->refcount))
178 batadv_orig_node_free_rcu(&orig_node->rcu);
179}
180
Sven Eckelmann56303d32012-06-05 22:31:31 +0200181void batadv_originator_free(struct batadv_priv *bat_priv)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000182{
Sven Eckelmann5bf74e92012-06-05 22:31:28 +0200183 struct batadv_hashtable *hash = bat_priv->orig_hash;
Sasha Levinb67bfe02013-02-27 17:06:00 -0800184 struct hlist_node *node_tmp;
Marek Lindner16b1aba2011-01-19 20:01:42 +0000185 struct hlist_head *head;
Marek Lindner16b1aba2011-01-19 20:01:42 +0000186 spinlock_t *list_lock; /* spinlock to protect write access */
Sven Eckelmann56303d32012-06-05 22:31:31 +0200187 struct batadv_orig_node *orig_node;
Antonio Quartullic90681b2011-10-05 17:05:25 +0200188 uint32_t i;
Marek Lindner16b1aba2011-01-19 20:01:42 +0000189
190 if (!hash)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000191 return;
192
193 cancel_delayed_work_sync(&bat_priv->orig_work);
194
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000195 bat_priv->orig_hash = NULL;
Marek Lindner16b1aba2011-01-19 20:01:42 +0000196
197 for (i = 0; i < hash->size; i++) {
198 head = &hash->table[i];
199 list_lock = &hash->list_locks[i];
200
201 spin_lock_bh(list_lock);
Sasha Levinb67bfe02013-02-27 17:06:00 -0800202 hlist_for_each_entry_safe(orig_node, node_tmp,
Marek Lindner7aadf882011-02-18 12:28:09 +0000203 head, hash_entry) {
Sasha Levinb67bfe02013-02-27 17:06:00 -0800204 hlist_del_rcu(&orig_node->hash_entry);
Sven Eckelmann7d211ef2012-05-12 02:09:34 +0200205 batadv_orig_node_free_ref(orig_node);
Marek Lindner16b1aba2011-01-19 20:01:42 +0000206 }
207 spin_unlock_bh(list_lock);
208 }
209
Sven Eckelmann1a8eaf02012-05-12 02:09:32 +0200210 batadv_hash_destroy(hash);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000211}
212
213/* this function finds or creates an originator entry for the given
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +0200214 * address if it does not exits
215 */
Sven Eckelmann56303d32012-06-05 22:31:31 +0200216struct batadv_orig_node *batadv_get_orig_node(struct batadv_priv *bat_priv,
217 const uint8_t *addr)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000218{
Sven Eckelmann56303d32012-06-05 22:31:31 +0200219 struct batadv_orig_node *orig_node;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000220 int size;
221 int hash_added;
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200222 unsigned long reset_time;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000223
Sven Eckelmannda641192012-05-12 13:48:56 +0200224 orig_node = batadv_orig_hash_find(bat_priv, addr);
Marek Lindner7aadf882011-02-18 12:28:09 +0000225 if (orig_node)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000226 return orig_node;
227
Sven Eckelmann39c75a52012-06-03 22:19:22 +0200228 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
229 "Creating new originator: %pM\n", addr);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000230
Sven Eckelmann704509b2011-05-14 23:14:54 +0200231 orig_node = kzalloc(sizeof(*orig_node), GFP_ATOMIC);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000232 if (!orig_node)
233 return NULL;
234
Marek Lindner9591a792010-12-12 21:57:11 +0000235 INIT_HLIST_HEAD(&orig_node->neigh_list);
Simon Wunderlicha4c135c2011-01-19 20:01:43 +0000236 INIT_LIST_HEAD(&orig_node->bond_list);
Marek Lindner2ae2daf2011-01-19 20:01:42 +0000237 spin_lock_init(&orig_node->ogm_cnt_lock);
Marek Lindnerf3e00082011-01-25 21:52:11 +0000238 spin_lock_init(&orig_node->bcast_seqno_lock);
Marek Lindnerf987ed62010-12-12 21:57:12 +0000239 spin_lock_init(&orig_node->neigh_list_lock);
Antonio Quartullia73105b2011-04-27 14:27:44 +0200240 spin_lock_init(&orig_node->tt_buff_lock);
Marek Lindner7b36e8e2011-02-18 12:28:10 +0000241
Martin Hundebølld56b1702013-01-25 11:12:39 +0100242 batadv_nc_init_orig(orig_node);
243
Marek Lindner7b36e8e2011-02-18 12:28:10 +0000244 /* extra reference for return */
245 atomic_set(&orig_node->refcount, 2);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000246
Antonio Quartulli17071572011-11-07 16:36:40 +0100247 orig_node->tt_initialised = false;
Marek Lindner16b1aba2011-01-19 20:01:42 +0000248 orig_node->bat_priv = bat_priv;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000249 memcpy(orig_node->orig, addr, ETH_ALEN);
Antonio Quartulli785ea112011-11-23 11:35:44 +0100250 batadv_dat_init_orig_node_addr(orig_node);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000251 orig_node->router = NULL;
Antonio Quartullic8c991b2011-07-07 01:40:57 +0200252 orig_node->tt_crc = 0;
253 atomic_set(&orig_node->last_ttvn, 0);
Antonio Quartulli2dafb492011-05-05 08:42:45 +0200254 orig_node->tt_buff = NULL;
Antonio Quartullia73105b2011-04-27 14:27:44 +0200255 orig_node->tt_buff_len = 0;
256 atomic_set(&orig_node->tt_size, 0);
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200257 reset_time = jiffies - 1 - msecs_to_jiffies(BATADV_RESET_PROTECTION_MS);
258 orig_node->bcast_seqno_reset = reset_time;
259 orig_node->batman_seqno_reset = reset_time;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000260
Simon Wunderlicha4c135c2011-01-19 20:01:43 +0000261 atomic_set(&orig_node->bond_candidates, 0);
262
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200263 size = bat_priv->num_ifaces * sizeof(unsigned long) * BATADV_NUM_WORDS;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000264
265 orig_node->bcast_own = kzalloc(size, GFP_ATOMIC);
266 if (!orig_node->bcast_own)
267 goto free_orig_node;
268
269 size = bat_priv->num_ifaces * sizeof(uint8_t);
270 orig_node->bcast_own_sum = kzalloc(size, GFP_ATOMIC);
271
272 INIT_LIST_HEAD(&orig_node->frag_list);
273 orig_node->last_frag_packet = 0;
274
275 if (!orig_node->bcast_own_sum)
276 goto free_bcast_own;
277
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200278 hash_added = batadv_hash_add(bat_priv->orig_hash, batadv_compare_orig,
Sven Eckelmannda641192012-05-12 13:48:56 +0200279 batadv_choose_orig, orig_node,
Sven Eckelmannc0a55922012-05-12 13:48:55 +0200280 &orig_node->hash_entry);
Antonio Quartulli1a1f37d2011-07-10 00:36:36 +0200281 if (hash_added != 0)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000282 goto free_bcast_own_sum;
283
284 return orig_node;
285free_bcast_own_sum:
286 kfree(orig_node->bcast_own_sum);
287free_bcast_own:
288 kfree(orig_node->bcast_own);
289free_orig_node:
290 kfree(orig_node);
291 return NULL;
292}
293
Sven Eckelmann56303d32012-06-05 22:31:31 +0200294static bool
295batadv_purge_orig_neighbors(struct batadv_priv *bat_priv,
296 struct batadv_orig_node *orig_node,
297 struct batadv_neigh_node **best_neigh_node)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000298{
Sasha Levinb67bfe02013-02-27 17:06:00 -0800299 struct hlist_node *node_tmp;
Sven Eckelmann56303d32012-06-05 22:31:31 +0200300 struct batadv_neigh_node *neigh_node;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000301 bool neigh_purged = false;
Marek Lindner0b0094e2012-03-01 15:35:20 +0800302 unsigned long last_seen;
Sven Eckelmann56303d32012-06-05 22:31:31 +0200303 struct batadv_hard_iface *if_incoming;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000304
305 *best_neigh_node = NULL;
306
Marek Lindnerf987ed62010-12-12 21:57:12 +0000307 spin_lock_bh(&orig_node->neigh_list_lock);
308
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000309 /* for all neighbors towards this originator ... */
Sasha Levinb67bfe02013-02-27 17:06:00 -0800310 hlist_for_each_entry_safe(neigh_node, node_tmp,
Marek Lindner9591a792010-12-12 21:57:11 +0000311 &orig_node->neigh_list, list) {
Sven Eckelmann1eda58b2012-05-12 13:48:58 +0200312 last_seen = neigh_node->last_seen;
313 if_incoming = neigh_node->if_incoming;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000314
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200315 if ((batadv_has_timed_out(last_seen, BATADV_PURGE_TIMEOUT)) ||
Sven Eckelmanne9a4f292012-06-03 22:19:19 +0200316 (if_incoming->if_status == BATADV_IF_INACTIVE) ||
317 (if_incoming->if_status == BATADV_IF_NOT_IN_USE) ||
318 (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) {
Sven Eckelmanne9a4f292012-06-03 22:19:19 +0200319 if ((if_incoming->if_status == BATADV_IF_INACTIVE) ||
320 (if_incoming->if_status == BATADV_IF_NOT_IN_USE) ||
321 (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED))
Sven Eckelmann39c75a52012-06-03 22:19:22 +0200322 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
Sven Eckelmann1eda58b2012-05-12 13:48:58 +0200323 "neighbor purge: originator %pM, neighbor: %pM, iface: %s\n",
324 orig_node->orig, neigh_node->addr,
325 if_incoming->net_dev->name);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000326 else
Sven Eckelmann39c75a52012-06-03 22:19:22 +0200327 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
Sven Eckelmann1eda58b2012-05-12 13:48:58 +0200328 "neighbor timeout: originator %pM, neighbor: %pM, last_seen: %u\n",
329 orig_node->orig, neigh_node->addr,
330 jiffies_to_msecs(last_seen));
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000331
332 neigh_purged = true;
Marek Lindner9591a792010-12-12 21:57:11 +0000333
Marek Lindnerf987ed62010-12-12 21:57:12 +0000334 hlist_del_rcu(&neigh_node->list);
Sven Eckelmann30d3c512012-05-12 02:09:36 +0200335 batadv_bonding_candidate_del(orig_node, neigh_node);
Sven Eckelmann7d211ef2012-05-12 02:09:34 +0200336 batadv_neigh_node_free_ref(neigh_node);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000337 } else {
338 if ((!*best_neigh_node) ||
339 (neigh_node->tq_avg > (*best_neigh_node)->tq_avg))
340 *best_neigh_node = neigh_node;
341 }
342 }
Marek Lindnerf987ed62010-12-12 21:57:12 +0000343
344 spin_unlock_bh(&orig_node->neigh_list_lock);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000345 return neigh_purged;
346}
347
Sven Eckelmann56303d32012-06-05 22:31:31 +0200348static bool batadv_purge_orig_node(struct batadv_priv *bat_priv,
349 struct batadv_orig_node *orig_node)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000350{
Sven Eckelmann56303d32012-06-05 22:31:31 +0200351 struct batadv_neigh_node *best_neigh_node;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000352
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200353 if (batadv_has_timed_out(orig_node->last_seen,
354 2 * BATADV_PURGE_TIMEOUT)) {
Sven Eckelmann39c75a52012-06-03 22:19:22 +0200355 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
Sven Eckelmann1eda58b2012-05-12 13:48:58 +0200356 "Originator timeout: originator %pM, last_seen %u\n",
357 orig_node->orig,
358 jiffies_to_msecs(orig_node->last_seen));
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000359 return true;
360 } else {
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200361 if (batadv_purge_orig_neighbors(bat_priv, orig_node,
362 &best_neigh_node))
Sven Eckelmann30d3c512012-05-12 02:09:36 +0200363 batadv_update_route(bat_priv, orig_node,
364 best_neigh_node);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000365 }
366
367 return false;
368}
369
Sven Eckelmann56303d32012-06-05 22:31:31 +0200370static void _batadv_purge_orig(struct batadv_priv *bat_priv)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000371{
Sven Eckelmann5bf74e92012-06-05 22:31:28 +0200372 struct batadv_hashtable *hash = bat_priv->orig_hash;
Sasha Levinb67bfe02013-02-27 17:06:00 -0800373 struct hlist_node *node_tmp;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000374 struct hlist_head *head;
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000375 spinlock_t *list_lock; /* spinlock to protect write access */
Sven Eckelmann56303d32012-06-05 22:31:31 +0200376 struct batadv_orig_node *orig_node;
Antonio Quartullic90681b2011-10-05 17:05:25 +0200377 uint32_t i;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000378
379 if (!hash)
380 return;
381
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000382 /* for all origins... */
383 for (i = 0; i < hash->size; i++) {
384 head = &hash->table[i];
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000385 list_lock = &hash->list_locks[i];
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000386
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000387 spin_lock_bh(list_lock);
Sasha Levinb67bfe02013-02-27 17:06:00 -0800388 hlist_for_each_entry_safe(orig_node, node_tmp,
Marek Lindner7aadf882011-02-18 12:28:09 +0000389 head, hash_entry) {
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200390 if (batadv_purge_orig_node(bat_priv, orig_node)) {
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000391 if (orig_node->gw_flags)
Sven Eckelmann7cf06bc2012-05-12 02:09:29 +0200392 batadv_gw_node_delete(bat_priv,
393 orig_node);
Sasha Levinb67bfe02013-02-27 17:06:00 -0800394 hlist_del_rcu(&orig_node->hash_entry);
Sven Eckelmann7d211ef2012-05-12 02:09:34 +0200395 batadv_orig_node_free_ref(orig_node);
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000396 continue;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000397 }
398
Sven Eckelmann1eda58b2012-05-12 13:48:58 +0200399 if (batadv_has_timed_out(orig_node->last_frag_packet,
Sven Eckelmann4d5d2db82012-06-03 22:19:15 +0200400 BATADV_FRAG_TIMEOUT))
Sven Eckelmann88ed1e772012-05-12 02:09:40 +0200401 batadv_frag_list_free(&orig_node->frag_list);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000402 }
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000403 spin_unlock_bh(list_lock);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000404 }
405
Sven Eckelmann7cf06bc2012-05-12 02:09:29 +0200406 batadv_gw_node_purge(bat_priv);
407 batadv_gw_election(bat_priv);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000408}
409
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200410static void batadv_purge_orig(struct work_struct *work)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000411{
Sven Eckelmann56303d32012-06-05 22:31:31 +0200412 struct delayed_work *delayed_work;
413 struct batadv_priv *bat_priv;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000414
Sven Eckelmann56303d32012-06-05 22:31:31 +0200415 delayed_work = container_of(work, struct delayed_work, work);
416 bat_priv = container_of(delayed_work, struct batadv_priv, orig_work);
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200417 _batadv_purge_orig(bat_priv);
Antonio Quartulli72414442012-12-25 13:14:37 +0100418 queue_delayed_work(batadv_event_workqueue,
419 &bat_priv->orig_work,
420 msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD));
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000421}
422
Sven Eckelmann56303d32012-06-05 22:31:31 +0200423void batadv_purge_orig_ref(struct batadv_priv *bat_priv)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000424{
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200425 _batadv_purge_orig(bat_priv);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000426}
427
Sven Eckelmann7d211ef2012-05-12 02:09:34 +0200428int batadv_orig_seq_print_text(struct seq_file *seq, void *offset)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000429{
430 struct net_device *net_dev = (struct net_device *)seq->private;
Sven Eckelmann56303d32012-06-05 22:31:31 +0200431 struct batadv_priv *bat_priv = netdev_priv(net_dev);
Sven Eckelmann5bf74e92012-06-05 22:31:28 +0200432 struct batadv_hashtable *hash = bat_priv->orig_hash;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000433 struct hlist_head *head;
Sven Eckelmann56303d32012-06-05 22:31:31 +0200434 struct batadv_hard_iface *primary_if;
435 struct batadv_orig_node *orig_node;
436 struct batadv_neigh_node *neigh_node, *neigh_node_tmp;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000437 int batman_count = 0;
438 int last_seen_secs;
439 int last_seen_msecs;
Sven Eckelmann0aca2362012-06-19 20:26:30 +0200440 unsigned long last_seen_jiffies;
Antonio Quartullic90681b2011-10-05 17:05:25 +0200441 uint32_t i;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000442
Marek Lindner30da63a2012-08-03 17:15:46 +0200443 primary_if = batadv_seq_print_text_primary_if_get(seq);
444 if (!primary_if)
Marek Lindner32ae9b22011-04-20 15:40:58 +0200445 goto out;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000446
Sven Eckelmann44c43492011-07-05 10:42:51 +0200447 seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s)]\n",
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200448 BATADV_SOURCE_VERSION, primary_if->net_dev->name,
Marek Lindner32ae9b22011-04-20 15:40:58 +0200449 primary_if->net_dev->dev_addr, net_dev->name);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000450 seq_printf(seq, " %-15s %s (%s/%i) %17s [%10s]: %20s ...\n",
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200451 "Originator", "last-seen", "#", BATADV_TQ_MAX_VALUE,
452 "Nexthop", "outgoingIF", "Potential nexthops");
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000453
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000454 for (i = 0; i < hash->size; i++) {
455 head = &hash->table[i];
456
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000457 rcu_read_lock();
Sasha Levinb67bfe02013-02-27 17:06:00 -0800458 hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
Sven Eckelmann7d211ef2012-05-12 02:09:34 +0200459 neigh_node = batadv_orig_node_get_router(orig_node);
Linus Lüssinge1a5382f2011-03-14 22:43:37 +0000460 if (!neigh_node)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000461 continue;
462
Linus Lüssinge1a5382f2011-03-14 22:43:37 +0000463 if (neigh_node->tq_avg == 0)
464 goto next;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000465
Sven Eckelmann0aca2362012-06-19 20:26:30 +0200466 last_seen_jiffies = jiffies - orig_node->last_seen;
467 last_seen_msecs = jiffies_to_msecs(last_seen_jiffies);
468 last_seen_secs = last_seen_msecs / 1000;
469 last_seen_msecs = last_seen_msecs % 1000;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000470
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000471 seq_printf(seq, "%pM %4i.%03is (%3i) %pM [%10s]:",
472 orig_node->orig, last_seen_secs,
473 last_seen_msecs, neigh_node->tq_avg,
474 neigh_node->addr,
475 neigh_node->if_incoming->net_dev->name);
476
Sasha Levinb67bfe02013-02-27 17:06:00 -0800477 hlist_for_each_entry_rcu(neigh_node_tmp,
Marek Lindnerf987ed62010-12-12 21:57:12 +0000478 &orig_node->neigh_list, list) {
Linus Lüssinge1a5382f2011-03-14 22:43:37 +0000479 seq_printf(seq, " %pM (%3i)",
480 neigh_node_tmp->addr,
481 neigh_node_tmp->tq_avg);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000482 }
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000483
Antonio Quartulli0c814652013-03-21 09:23:29 +0100484 seq_puts(seq, "\n");
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000485 batman_count++;
Linus Lüssinge1a5382f2011-03-14 22:43:37 +0000486
487next:
Sven Eckelmann7d211ef2012-05-12 02:09:34 +0200488 batadv_neigh_node_free_ref(neigh_node);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000489 }
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000490 rcu_read_unlock();
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000491 }
492
Linus Lüssinge1a5382f2011-03-14 22:43:37 +0000493 if (batman_count == 0)
Antonio Quartulli0c814652013-03-21 09:23:29 +0100494 seq_puts(seq, "No batman nodes in range ...\n");
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000495
Marek Lindner32ae9b22011-04-20 15:40:58 +0200496out:
497 if (primary_if)
Sven Eckelmanne5d89252012-05-12 13:48:54 +0200498 batadv_hardif_free_ref(primary_if);
Marek Lindner30da63a2012-08-03 17:15:46 +0200499 return 0;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000500}
501
Sven Eckelmann56303d32012-06-05 22:31:31 +0200502static int batadv_orig_node_add_if(struct batadv_orig_node *orig_node,
503 int max_if_num)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000504{
505 void *data_ptr;
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200506 size_t data_size, old_size;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000507
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200508 data_size = max_if_num * sizeof(unsigned long) * BATADV_NUM_WORDS;
509 old_size = (max_if_num - 1) * sizeof(unsigned long) * BATADV_NUM_WORDS;
510 data_ptr = kmalloc(data_size, GFP_ATOMIC);
Joe Perches320f4222011-08-29 14:17:24 -0700511 if (!data_ptr)
Sven Eckelmann5346c352012-05-05 13:27:28 +0200512 return -ENOMEM;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000513
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200514 memcpy(data_ptr, orig_node->bcast_own, old_size);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000515 kfree(orig_node->bcast_own);
516 orig_node->bcast_own = data_ptr;
517
518 data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC);
Joe Perches320f4222011-08-29 14:17:24 -0700519 if (!data_ptr)
Sven Eckelmann5346c352012-05-05 13:27:28 +0200520 return -ENOMEM;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000521
522 memcpy(data_ptr, orig_node->bcast_own_sum,
523 (max_if_num - 1) * sizeof(uint8_t));
524 kfree(orig_node->bcast_own_sum);
525 orig_node->bcast_own_sum = data_ptr;
526
527 return 0;
528}
529
Sven Eckelmann56303d32012-06-05 22:31:31 +0200530int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface,
531 int max_if_num)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000532{
Sven Eckelmann56303d32012-06-05 22:31:31 +0200533 struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
Sven Eckelmann5bf74e92012-06-05 22:31:28 +0200534 struct batadv_hashtable *hash = bat_priv->orig_hash;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000535 struct hlist_head *head;
Sven Eckelmann56303d32012-06-05 22:31:31 +0200536 struct batadv_orig_node *orig_node;
Antonio Quartullic90681b2011-10-05 17:05:25 +0200537 uint32_t i;
538 int ret;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000539
540 /* resize all orig nodes because orig_node->bcast_own(_sum) depend on
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +0200541 * if_num
542 */
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000543 for (i = 0; i < hash->size; i++) {
544 head = &hash->table[i];
545
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000546 rcu_read_lock();
Sasha Levinb67bfe02013-02-27 17:06:00 -0800547 hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
Marek Lindner2ae2daf2011-01-19 20:01:42 +0000548 spin_lock_bh(&orig_node->ogm_cnt_lock);
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200549 ret = batadv_orig_node_add_if(orig_node, max_if_num);
Marek Lindner2ae2daf2011-01-19 20:01:42 +0000550 spin_unlock_bh(&orig_node->ogm_cnt_lock);
551
Sven Eckelmann5346c352012-05-05 13:27:28 +0200552 if (ret == -ENOMEM)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000553 goto err;
554 }
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000555 rcu_read_unlock();
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000556 }
557
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000558 return 0;
559
560err:
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000561 rcu_read_unlock();
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000562 return -ENOMEM;
563}
564
Sven Eckelmann56303d32012-06-05 22:31:31 +0200565static int batadv_orig_node_del_if(struct batadv_orig_node *orig_node,
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200566 int max_if_num, int del_if_num)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000567{
568 void *data_ptr = NULL;
569 int chunk_size;
570
571 /* last interface was removed */
572 if (max_if_num == 0)
573 goto free_bcast_own;
574
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200575 chunk_size = sizeof(unsigned long) * BATADV_NUM_WORDS;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000576 data_ptr = kmalloc(max_if_num * chunk_size, GFP_ATOMIC);
Joe Perches320f4222011-08-29 14:17:24 -0700577 if (!data_ptr)
Sven Eckelmann5346c352012-05-05 13:27:28 +0200578 return -ENOMEM;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000579
580 /* copy first part */
581 memcpy(data_ptr, orig_node->bcast_own, del_if_num * chunk_size);
582
583 /* copy second part */
Sven Eckelmann38e3c5f2011-05-14 23:14:49 +0200584 memcpy((char *)data_ptr + del_if_num * chunk_size,
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000585 orig_node->bcast_own + ((del_if_num + 1) * chunk_size),
586 (max_if_num - del_if_num) * chunk_size);
587
588free_bcast_own:
589 kfree(orig_node->bcast_own);
590 orig_node->bcast_own = data_ptr;
591
592 if (max_if_num == 0)
593 goto free_own_sum;
594
595 data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC);
Joe Perches320f4222011-08-29 14:17:24 -0700596 if (!data_ptr)
Sven Eckelmann5346c352012-05-05 13:27:28 +0200597 return -ENOMEM;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000598
599 memcpy(data_ptr, orig_node->bcast_own_sum,
600 del_if_num * sizeof(uint8_t));
601
Sven Eckelmann38e3c5f2011-05-14 23:14:49 +0200602 memcpy((char *)data_ptr + del_if_num * sizeof(uint8_t),
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000603 orig_node->bcast_own_sum + ((del_if_num + 1) * sizeof(uint8_t)),
604 (max_if_num - del_if_num) * sizeof(uint8_t));
605
606free_own_sum:
607 kfree(orig_node->bcast_own_sum);
608 orig_node->bcast_own_sum = data_ptr;
609
610 return 0;
611}
612
Sven Eckelmann56303d32012-06-05 22:31:31 +0200613int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface,
614 int max_if_num)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000615{
Sven Eckelmann56303d32012-06-05 22:31:31 +0200616 struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
Sven Eckelmann5bf74e92012-06-05 22:31:28 +0200617 struct batadv_hashtable *hash = bat_priv->orig_hash;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000618 struct hlist_head *head;
Sven Eckelmann56303d32012-06-05 22:31:31 +0200619 struct batadv_hard_iface *hard_iface_tmp;
620 struct batadv_orig_node *orig_node;
Antonio Quartullic90681b2011-10-05 17:05:25 +0200621 uint32_t i;
622 int ret;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000623
624 /* resize all orig nodes because orig_node->bcast_own(_sum) depend on
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +0200625 * if_num
626 */
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000627 for (i = 0; i < hash->size; i++) {
628 head = &hash->table[i];
629
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000630 rcu_read_lock();
Sasha Levinb67bfe02013-02-27 17:06:00 -0800631 hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
Marek Lindner2ae2daf2011-01-19 20:01:42 +0000632 spin_lock_bh(&orig_node->ogm_cnt_lock);
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200633 ret = batadv_orig_node_del_if(orig_node, max_if_num,
634 hard_iface->if_num);
Marek Lindner2ae2daf2011-01-19 20:01:42 +0000635 spin_unlock_bh(&orig_node->ogm_cnt_lock);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000636
Sven Eckelmann5346c352012-05-05 13:27:28 +0200637 if (ret == -ENOMEM)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000638 goto err;
639 }
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000640 rcu_read_unlock();
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000641 }
642
643 /* renumber remaining batman interfaces _inside_ of orig_hash_lock */
644 rcu_read_lock();
Sven Eckelmann3193e8f2012-05-12 02:09:42 +0200645 list_for_each_entry_rcu(hard_iface_tmp, &batadv_hardif_list, list) {
Sven Eckelmanne9a4f292012-06-03 22:19:19 +0200646 if (hard_iface_tmp->if_status == BATADV_IF_NOT_IN_USE)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000647 continue;
648
Marek Lindnere6c10f42011-02-18 12:33:20 +0000649 if (hard_iface == hard_iface_tmp)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000650 continue;
651
Marek Lindnere6c10f42011-02-18 12:33:20 +0000652 if (hard_iface->soft_iface != hard_iface_tmp->soft_iface)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000653 continue;
654
Marek Lindnere6c10f42011-02-18 12:33:20 +0000655 if (hard_iface_tmp->if_num > hard_iface->if_num)
656 hard_iface_tmp->if_num--;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000657 }
658 rcu_read_unlock();
659
Marek Lindnere6c10f42011-02-18 12:33:20 +0000660 hard_iface->if_num = -1;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000661 return 0;
662
663err:
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000664 rcu_read_unlock();
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000665 return -ENOMEM;
666}