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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"
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000031
Antonio Quartullidec05072012-11-10 11:00:32 +010032/* hash class keys */
33static struct lock_class_key batadv_orig_hash_lock_class_key;
34
Sven Eckelmann03fc7f82012-05-12 18:34:00 +020035static void batadv_purge_orig(struct work_struct *work);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000036
Sven Eckelmannb8e2dd12011-06-15 15:08:59 +020037/* returns 1 if they are the same originator */
Sven Eckelmann03fc7f82012-05-12 18:34:00 +020038static int batadv_compare_orig(const struct hlist_node *node, const void *data2)
Sven Eckelmannb8e2dd12011-06-15 15:08:59 +020039{
Sven Eckelmann56303d32012-06-05 22:31:31 +020040 const void *data1 = container_of(node, struct batadv_orig_node,
41 hash_entry);
Sven Eckelmannb8e2dd12011-06-15 15:08:59 +020042
43 return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0);
44}
45
Sven Eckelmann56303d32012-06-05 22:31:31 +020046int batadv_originator_init(struct batadv_priv *bat_priv)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000047{
48 if (bat_priv->orig_hash)
Sven Eckelmann5346c352012-05-05 13:27:28 +020049 return 0;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000050
Sven Eckelmann1a8eaf02012-05-12 02:09:32 +020051 bat_priv->orig_hash = batadv_hash_new(1024);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000052
53 if (!bat_priv->orig_hash)
54 goto err;
55
Antonio Quartullidec05072012-11-10 11:00:32 +010056 batadv_hash_set_lock_class(bat_priv->orig_hash,
57 &batadv_orig_hash_lock_class_key);
58
Antonio Quartulli72414442012-12-25 13:14:37 +010059 INIT_DELAYED_WORK(&bat_priv->orig_work, batadv_purge_orig);
60 queue_delayed_work(batadv_event_workqueue,
61 &bat_priv->orig_work,
62 msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD));
63
Sven Eckelmann5346c352012-05-05 13:27:28 +020064 return 0;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000065
66err:
Sven Eckelmann5346c352012-05-05 13:27:28 +020067 return -ENOMEM;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000068}
69
Sven Eckelmann56303d32012-06-05 22:31:31 +020070void batadv_neigh_node_free_ref(struct batadv_neigh_node *neigh_node)
Simon Wunderlicha4c135c2011-01-19 20:01:43 +000071{
Marek Lindner44524fc2011-02-10 14:33:53 +000072 if (atomic_dec_and_test(&neigh_node->refcount))
Paul E. McKenneyae179ae2011-05-01 23:27:50 -070073 kfree_rcu(neigh_node, rcu);
Simon Wunderlicha4c135c2011-01-19 20:01:43 +000074}
75
Linus Lüssinge1a5382f2011-03-14 22:43:37 +000076/* increases the refcounter of a found router */
Sven Eckelmann56303d32012-06-05 22:31:31 +020077struct batadv_neigh_node *
78batadv_orig_node_get_router(struct batadv_orig_node *orig_node)
Linus Lüssinge1a5382f2011-03-14 22:43:37 +000079{
Sven Eckelmann56303d32012-06-05 22:31:31 +020080 struct batadv_neigh_node *router;
Linus Lüssinge1a5382f2011-03-14 22:43:37 +000081
82 rcu_read_lock();
83 router = rcu_dereference(orig_node->router);
84
85 if (router && !atomic_inc_not_zero(&router->refcount))
86 router = NULL;
87
88 rcu_read_unlock();
89 return router;
90}
91
Sven Eckelmann56303d32012-06-05 22:31:31 +020092struct batadv_neigh_node *
93batadv_neigh_node_new(struct batadv_hard_iface *hard_iface,
94 const uint8_t *neigh_addr, uint32_t seqno)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000095{
Sven Eckelmann56303d32012-06-05 22:31:31 +020096 struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
97 struct batadv_neigh_node *neigh_node;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +000098
Sven Eckelmann704509b2011-05-14 23:14:54 +020099 neigh_node = kzalloc(sizeof(*neigh_node), GFP_ATOMIC);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000100 if (!neigh_node)
Marek Lindner7ae8b282012-03-01 15:35:21 +0800101 goto out;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000102
Marek Lindner9591a792010-12-12 21:57:11 +0000103 INIT_HLIST_NODE(&neigh_node->list);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000104
Marek Lindner7ae8b282012-03-01 15:35:21 +0800105 memcpy(neigh_node->addr, neigh_addr, ETH_ALEN);
Marek Lindnere3b0d0d2012-03-17 15:28:32 +0800106 spin_lock_init(&neigh_node->lq_update_lock);
Marek Lindner1605d0d2011-02-18 12:28:11 +0000107
108 /* extra reference for return */
109 atomic_set(&neigh_node->refcount, 2);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000110
Sven Eckelmann39c75a52012-06-03 22:19:22 +0200111 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
Sven Eckelmann1eda58b2012-05-12 13:48:58 +0200112 "Creating new neighbor %pM, initial seqno %d\n",
113 neigh_addr, seqno);
Marek Lindner7ae8b282012-03-01 15:35:21 +0800114
115out:
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000116 return neigh_node;
117}
118
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200119static void batadv_orig_node_free_rcu(struct rcu_head *rcu)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000120{
Sasha Levinb67bfe02013-02-27 17:06:00 -0800121 struct hlist_node *node_tmp;
Sven Eckelmann56303d32012-06-05 22:31:31 +0200122 struct batadv_neigh_node *neigh_node, *tmp_neigh_node;
123 struct batadv_orig_node *orig_node;
Marek Lindner16b1aba2011-01-19 20:01:42 +0000124
Sven Eckelmann56303d32012-06-05 22:31:31 +0200125 orig_node = container_of(rcu, struct batadv_orig_node, rcu);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000126
Marek Lindnerf987ed62010-12-12 21:57:12 +0000127 spin_lock_bh(&orig_node->neigh_list_lock);
128
Simon Wunderlicha4c135c2011-01-19 20:01:43 +0000129 /* for all bonding members ... */
130 list_for_each_entry_safe(neigh_node, tmp_neigh_node,
131 &orig_node->bond_list, bonding_list) {
132 list_del_rcu(&neigh_node->bonding_list);
Sven Eckelmann7d211ef2012-05-12 02:09:34 +0200133 batadv_neigh_node_free_ref(neigh_node);
Simon Wunderlicha4c135c2011-01-19 20:01:43 +0000134 }
135
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000136 /* for all neighbors towards this originator ... */
Sasha Levinb67bfe02013-02-27 17:06:00 -0800137 hlist_for_each_entry_safe(neigh_node, node_tmp,
Marek Lindner9591a792010-12-12 21:57:11 +0000138 &orig_node->neigh_list, list) {
Marek Lindnerf987ed62010-12-12 21:57:12 +0000139 hlist_del_rcu(&neigh_node->list);
Sven Eckelmann7d211ef2012-05-12 02:09:34 +0200140 batadv_neigh_node_free_ref(neigh_node);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000141 }
142
Marek Lindnerf987ed62010-12-12 21:57:12 +0000143 spin_unlock_bh(&orig_node->neigh_list_lock);
144
Sven Eckelmann88ed1e772012-05-12 02:09:40 +0200145 batadv_frag_list_free(&orig_node->frag_list);
Sven Eckelmann08c36d32012-05-12 02:09:39 +0200146 batadv_tt_global_del_orig(orig_node->bat_priv, orig_node,
147 "originator timed out");
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000148
Antonio Quartullia73105b2011-04-27 14:27:44 +0200149 kfree(orig_node->tt_buff);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000150 kfree(orig_node->bcast_own);
151 kfree(orig_node->bcast_own_sum);
152 kfree(orig_node);
153}
154
Sven Eckelmann56303d32012-06-05 22:31:31 +0200155void batadv_orig_node_free_ref(struct batadv_orig_node *orig_node)
Marek Lindner7b36e8e2011-02-18 12:28:10 +0000156{
157 if (atomic_dec_and_test(&orig_node->refcount))
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200158 call_rcu(&orig_node->rcu, batadv_orig_node_free_rcu);
Marek Lindner7b36e8e2011-02-18 12:28:10 +0000159}
160
Sven Eckelmann56303d32012-06-05 22:31:31 +0200161void batadv_originator_free(struct batadv_priv *bat_priv)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000162{
Sven Eckelmann5bf74e92012-06-05 22:31:28 +0200163 struct batadv_hashtable *hash = bat_priv->orig_hash;
Sasha Levinb67bfe02013-02-27 17:06:00 -0800164 struct hlist_node *node_tmp;
Marek Lindner16b1aba2011-01-19 20:01:42 +0000165 struct hlist_head *head;
Marek Lindner16b1aba2011-01-19 20:01:42 +0000166 spinlock_t *list_lock; /* spinlock to protect write access */
Sven Eckelmann56303d32012-06-05 22:31:31 +0200167 struct batadv_orig_node *orig_node;
Antonio Quartullic90681b2011-10-05 17:05:25 +0200168 uint32_t i;
Marek Lindner16b1aba2011-01-19 20:01:42 +0000169
170 if (!hash)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000171 return;
172
173 cancel_delayed_work_sync(&bat_priv->orig_work);
174
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000175 bat_priv->orig_hash = NULL;
Marek Lindner16b1aba2011-01-19 20:01:42 +0000176
177 for (i = 0; i < hash->size; i++) {
178 head = &hash->table[i];
179 list_lock = &hash->list_locks[i];
180
181 spin_lock_bh(list_lock);
Sasha Levinb67bfe02013-02-27 17:06:00 -0800182 hlist_for_each_entry_safe(orig_node, node_tmp,
Marek Lindner7aadf882011-02-18 12:28:09 +0000183 head, hash_entry) {
Sasha Levinb67bfe02013-02-27 17:06:00 -0800184 hlist_del_rcu(&orig_node->hash_entry);
Sven Eckelmann7d211ef2012-05-12 02:09:34 +0200185 batadv_orig_node_free_ref(orig_node);
Marek Lindner16b1aba2011-01-19 20:01:42 +0000186 }
187 spin_unlock_bh(list_lock);
188 }
189
Sven Eckelmann1a8eaf02012-05-12 02:09:32 +0200190 batadv_hash_destroy(hash);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000191}
192
193/* this function finds or creates an originator entry for the given
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +0200194 * address if it does not exits
195 */
Sven Eckelmann56303d32012-06-05 22:31:31 +0200196struct batadv_orig_node *batadv_get_orig_node(struct batadv_priv *bat_priv,
197 const uint8_t *addr)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000198{
Sven Eckelmann56303d32012-06-05 22:31:31 +0200199 struct batadv_orig_node *orig_node;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000200 int size;
201 int hash_added;
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200202 unsigned long reset_time;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000203
Sven Eckelmannda641192012-05-12 13:48:56 +0200204 orig_node = batadv_orig_hash_find(bat_priv, addr);
Marek Lindner7aadf882011-02-18 12:28:09 +0000205 if (orig_node)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000206 return orig_node;
207
Sven Eckelmann39c75a52012-06-03 22:19:22 +0200208 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
209 "Creating new originator: %pM\n", addr);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000210
Sven Eckelmann704509b2011-05-14 23:14:54 +0200211 orig_node = kzalloc(sizeof(*orig_node), GFP_ATOMIC);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000212 if (!orig_node)
213 return NULL;
214
Marek Lindner9591a792010-12-12 21:57:11 +0000215 INIT_HLIST_HEAD(&orig_node->neigh_list);
Simon Wunderlicha4c135c2011-01-19 20:01:43 +0000216 INIT_LIST_HEAD(&orig_node->bond_list);
Marek Lindner2ae2daf2011-01-19 20:01:42 +0000217 spin_lock_init(&orig_node->ogm_cnt_lock);
Marek Lindnerf3e00082011-01-25 21:52:11 +0000218 spin_lock_init(&orig_node->bcast_seqno_lock);
Marek Lindnerf987ed62010-12-12 21:57:12 +0000219 spin_lock_init(&orig_node->neigh_list_lock);
Antonio Quartullia73105b2011-04-27 14:27:44 +0200220 spin_lock_init(&orig_node->tt_buff_lock);
Marek Lindner7b36e8e2011-02-18 12:28:10 +0000221
222 /* extra reference for return */
223 atomic_set(&orig_node->refcount, 2);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000224
Antonio Quartulli17071572011-11-07 16:36:40 +0100225 orig_node->tt_initialised = false;
Marek Lindner16b1aba2011-01-19 20:01:42 +0000226 orig_node->bat_priv = bat_priv;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000227 memcpy(orig_node->orig, addr, ETH_ALEN);
Antonio Quartulli785ea112011-11-23 11:35:44 +0100228 batadv_dat_init_orig_node_addr(orig_node);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000229 orig_node->router = NULL;
Antonio Quartullic8c991b2011-07-07 01:40:57 +0200230 orig_node->tt_crc = 0;
231 atomic_set(&orig_node->last_ttvn, 0);
Antonio Quartulli2dafb492011-05-05 08:42:45 +0200232 orig_node->tt_buff = NULL;
Antonio Quartullia73105b2011-04-27 14:27:44 +0200233 orig_node->tt_buff_len = 0;
234 atomic_set(&orig_node->tt_size, 0);
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200235 reset_time = jiffies - 1 - msecs_to_jiffies(BATADV_RESET_PROTECTION_MS);
236 orig_node->bcast_seqno_reset = reset_time;
237 orig_node->batman_seqno_reset = reset_time;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000238
Simon Wunderlicha4c135c2011-01-19 20:01:43 +0000239 atomic_set(&orig_node->bond_candidates, 0);
240
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200241 size = bat_priv->num_ifaces * sizeof(unsigned long) * BATADV_NUM_WORDS;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000242
243 orig_node->bcast_own = kzalloc(size, GFP_ATOMIC);
244 if (!orig_node->bcast_own)
245 goto free_orig_node;
246
247 size = bat_priv->num_ifaces * sizeof(uint8_t);
248 orig_node->bcast_own_sum = kzalloc(size, GFP_ATOMIC);
249
250 INIT_LIST_HEAD(&orig_node->frag_list);
251 orig_node->last_frag_packet = 0;
252
253 if (!orig_node->bcast_own_sum)
254 goto free_bcast_own;
255
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200256 hash_added = batadv_hash_add(bat_priv->orig_hash, batadv_compare_orig,
Sven Eckelmannda641192012-05-12 13:48:56 +0200257 batadv_choose_orig, orig_node,
Sven Eckelmannc0a55922012-05-12 13:48:55 +0200258 &orig_node->hash_entry);
Antonio Quartulli1a1f37d2011-07-10 00:36:36 +0200259 if (hash_added != 0)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000260 goto free_bcast_own_sum;
261
262 return orig_node;
263free_bcast_own_sum:
264 kfree(orig_node->bcast_own_sum);
265free_bcast_own:
266 kfree(orig_node->bcast_own);
267free_orig_node:
268 kfree(orig_node);
269 return NULL;
270}
271
Sven Eckelmann56303d32012-06-05 22:31:31 +0200272static bool
273batadv_purge_orig_neighbors(struct batadv_priv *bat_priv,
274 struct batadv_orig_node *orig_node,
275 struct batadv_neigh_node **best_neigh_node)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000276{
Sasha Levinb67bfe02013-02-27 17:06:00 -0800277 struct hlist_node *node_tmp;
Sven Eckelmann56303d32012-06-05 22:31:31 +0200278 struct batadv_neigh_node *neigh_node;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000279 bool neigh_purged = false;
Marek Lindner0b0094e2012-03-01 15:35:20 +0800280 unsigned long last_seen;
Sven Eckelmann56303d32012-06-05 22:31:31 +0200281 struct batadv_hard_iface *if_incoming;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000282
283 *best_neigh_node = NULL;
284
Marek Lindnerf987ed62010-12-12 21:57:12 +0000285 spin_lock_bh(&orig_node->neigh_list_lock);
286
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000287 /* for all neighbors towards this originator ... */
Sasha Levinb67bfe02013-02-27 17:06:00 -0800288 hlist_for_each_entry_safe(neigh_node, node_tmp,
Marek Lindner9591a792010-12-12 21:57:11 +0000289 &orig_node->neigh_list, list) {
Sven Eckelmann1eda58b2012-05-12 13:48:58 +0200290 last_seen = neigh_node->last_seen;
291 if_incoming = neigh_node->if_incoming;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000292
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200293 if ((batadv_has_timed_out(last_seen, BATADV_PURGE_TIMEOUT)) ||
Sven Eckelmanne9a4f292012-06-03 22:19:19 +0200294 (if_incoming->if_status == BATADV_IF_INACTIVE) ||
295 (if_incoming->if_status == BATADV_IF_NOT_IN_USE) ||
296 (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) {
Sven Eckelmanne9a4f292012-06-03 22:19:19 +0200297 if ((if_incoming->if_status == BATADV_IF_INACTIVE) ||
298 (if_incoming->if_status == BATADV_IF_NOT_IN_USE) ||
299 (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED))
Sven Eckelmann39c75a52012-06-03 22:19:22 +0200300 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
Sven Eckelmann1eda58b2012-05-12 13:48:58 +0200301 "neighbor purge: originator %pM, neighbor: %pM, iface: %s\n",
302 orig_node->orig, neigh_node->addr,
303 if_incoming->net_dev->name);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000304 else
Sven Eckelmann39c75a52012-06-03 22:19:22 +0200305 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
Sven Eckelmann1eda58b2012-05-12 13:48:58 +0200306 "neighbor timeout: originator %pM, neighbor: %pM, last_seen: %u\n",
307 orig_node->orig, neigh_node->addr,
308 jiffies_to_msecs(last_seen));
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000309
310 neigh_purged = true;
Marek Lindner9591a792010-12-12 21:57:11 +0000311
Marek Lindnerf987ed62010-12-12 21:57:12 +0000312 hlist_del_rcu(&neigh_node->list);
Sven Eckelmann30d3c512012-05-12 02:09:36 +0200313 batadv_bonding_candidate_del(orig_node, neigh_node);
Sven Eckelmann7d211ef2012-05-12 02:09:34 +0200314 batadv_neigh_node_free_ref(neigh_node);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000315 } else {
316 if ((!*best_neigh_node) ||
317 (neigh_node->tq_avg > (*best_neigh_node)->tq_avg))
318 *best_neigh_node = neigh_node;
319 }
320 }
Marek Lindnerf987ed62010-12-12 21:57:12 +0000321
322 spin_unlock_bh(&orig_node->neigh_list_lock);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000323 return neigh_purged;
324}
325
Sven Eckelmann56303d32012-06-05 22:31:31 +0200326static bool batadv_purge_orig_node(struct batadv_priv *bat_priv,
327 struct batadv_orig_node *orig_node)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000328{
Sven Eckelmann56303d32012-06-05 22:31:31 +0200329 struct batadv_neigh_node *best_neigh_node;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000330
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200331 if (batadv_has_timed_out(orig_node->last_seen,
332 2 * BATADV_PURGE_TIMEOUT)) {
Sven Eckelmann39c75a52012-06-03 22:19:22 +0200333 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
Sven Eckelmann1eda58b2012-05-12 13:48:58 +0200334 "Originator timeout: originator %pM, last_seen %u\n",
335 orig_node->orig,
336 jiffies_to_msecs(orig_node->last_seen));
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000337 return true;
338 } else {
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200339 if (batadv_purge_orig_neighbors(bat_priv, orig_node,
340 &best_neigh_node))
Sven Eckelmann30d3c512012-05-12 02:09:36 +0200341 batadv_update_route(bat_priv, orig_node,
342 best_neigh_node);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000343 }
344
345 return false;
346}
347
Sven Eckelmann56303d32012-06-05 22:31:31 +0200348static void _batadv_purge_orig(struct batadv_priv *bat_priv)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000349{
Sven Eckelmann5bf74e92012-06-05 22:31:28 +0200350 struct batadv_hashtable *hash = bat_priv->orig_hash;
Sasha Levinb67bfe02013-02-27 17:06:00 -0800351 struct hlist_node *node_tmp;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000352 struct hlist_head *head;
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000353 spinlock_t *list_lock; /* spinlock to protect write access */
Sven Eckelmann56303d32012-06-05 22:31:31 +0200354 struct batadv_orig_node *orig_node;
Antonio Quartullic90681b2011-10-05 17:05:25 +0200355 uint32_t i;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000356
357 if (!hash)
358 return;
359
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000360 /* for all origins... */
361 for (i = 0; i < hash->size; i++) {
362 head = &hash->table[i];
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000363 list_lock = &hash->list_locks[i];
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000364
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000365 spin_lock_bh(list_lock);
Sasha Levinb67bfe02013-02-27 17:06:00 -0800366 hlist_for_each_entry_safe(orig_node, node_tmp,
Marek Lindner7aadf882011-02-18 12:28:09 +0000367 head, hash_entry) {
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200368 if (batadv_purge_orig_node(bat_priv, orig_node)) {
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000369 if (orig_node->gw_flags)
Sven Eckelmann7cf06bc2012-05-12 02:09:29 +0200370 batadv_gw_node_delete(bat_priv,
371 orig_node);
Sasha Levinb67bfe02013-02-27 17:06:00 -0800372 hlist_del_rcu(&orig_node->hash_entry);
Sven Eckelmann7d211ef2012-05-12 02:09:34 +0200373 batadv_orig_node_free_ref(orig_node);
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000374 continue;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000375 }
376
Sven Eckelmann1eda58b2012-05-12 13:48:58 +0200377 if (batadv_has_timed_out(orig_node->last_frag_packet,
Sven Eckelmann4d5d2db82012-06-03 22:19:15 +0200378 BATADV_FRAG_TIMEOUT))
Sven Eckelmann88ed1e772012-05-12 02:09:40 +0200379 batadv_frag_list_free(&orig_node->frag_list);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000380 }
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000381 spin_unlock_bh(list_lock);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000382 }
383
Sven Eckelmann7cf06bc2012-05-12 02:09:29 +0200384 batadv_gw_node_purge(bat_priv);
385 batadv_gw_election(bat_priv);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000386}
387
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200388static void batadv_purge_orig(struct work_struct *work)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000389{
Sven Eckelmann56303d32012-06-05 22:31:31 +0200390 struct delayed_work *delayed_work;
391 struct batadv_priv *bat_priv;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000392
Sven Eckelmann56303d32012-06-05 22:31:31 +0200393 delayed_work = container_of(work, struct delayed_work, work);
394 bat_priv = container_of(delayed_work, struct batadv_priv, orig_work);
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200395 _batadv_purge_orig(bat_priv);
Antonio Quartulli72414442012-12-25 13:14:37 +0100396 queue_delayed_work(batadv_event_workqueue,
397 &bat_priv->orig_work,
398 msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD));
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000399}
400
Sven Eckelmann56303d32012-06-05 22:31:31 +0200401void batadv_purge_orig_ref(struct batadv_priv *bat_priv)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000402{
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200403 _batadv_purge_orig(bat_priv);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000404}
405
Sven Eckelmann7d211ef2012-05-12 02:09:34 +0200406int batadv_orig_seq_print_text(struct seq_file *seq, void *offset)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000407{
408 struct net_device *net_dev = (struct net_device *)seq->private;
Sven Eckelmann56303d32012-06-05 22:31:31 +0200409 struct batadv_priv *bat_priv = netdev_priv(net_dev);
Sven Eckelmann5bf74e92012-06-05 22:31:28 +0200410 struct batadv_hashtable *hash = bat_priv->orig_hash;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000411 struct hlist_head *head;
Sven Eckelmann56303d32012-06-05 22:31:31 +0200412 struct batadv_hard_iface *primary_if;
413 struct batadv_orig_node *orig_node;
414 struct batadv_neigh_node *neigh_node, *neigh_node_tmp;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000415 int batman_count = 0;
416 int last_seen_secs;
417 int last_seen_msecs;
Sven Eckelmann0aca2362012-06-19 20:26:30 +0200418 unsigned long last_seen_jiffies;
Antonio Quartullic90681b2011-10-05 17:05:25 +0200419 uint32_t i;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000420
Marek Lindner30da63a2012-08-03 17:15:46 +0200421 primary_if = batadv_seq_print_text_primary_if_get(seq);
422 if (!primary_if)
Marek Lindner32ae9b22011-04-20 15:40:58 +0200423 goto out;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000424
Sven Eckelmann44c43492011-07-05 10:42:51 +0200425 seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s)]\n",
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200426 BATADV_SOURCE_VERSION, primary_if->net_dev->name,
Marek Lindner32ae9b22011-04-20 15:40:58 +0200427 primary_if->net_dev->dev_addr, net_dev->name);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000428 seq_printf(seq, " %-15s %s (%s/%i) %17s [%10s]: %20s ...\n",
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200429 "Originator", "last-seen", "#", BATADV_TQ_MAX_VALUE,
430 "Nexthop", "outgoingIF", "Potential nexthops");
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000431
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000432 for (i = 0; i < hash->size; i++) {
433 head = &hash->table[i];
434
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000435 rcu_read_lock();
Sasha Levinb67bfe02013-02-27 17:06:00 -0800436 hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
Sven Eckelmann7d211ef2012-05-12 02:09:34 +0200437 neigh_node = batadv_orig_node_get_router(orig_node);
Linus Lüssinge1a5382f2011-03-14 22:43:37 +0000438 if (!neigh_node)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000439 continue;
440
Linus Lüssinge1a5382f2011-03-14 22:43:37 +0000441 if (neigh_node->tq_avg == 0)
442 goto next;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000443
Sven Eckelmann0aca2362012-06-19 20:26:30 +0200444 last_seen_jiffies = jiffies - orig_node->last_seen;
445 last_seen_msecs = jiffies_to_msecs(last_seen_jiffies);
446 last_seen_secs = last_seen_msecs / 1000;
447 last_seen_msecs = last_seen_msecs % 1000;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000448
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000449 seq_printf(seq, "%pM %4i.%03is (%3i) %pM [%10s]:",
450 orig_node->orig, last_seen_secs,
451 last_seen_msecs, neigh_node->tq_avg,
452 neigh_node->addr,
453 neigh_node->if_incoming->net_dev->name);
454
Sasha Levinb67bfe02013-02-27 17:06:00 -0800455 hlist_for_each_entry_rcu(neigh_node_tmp,
Marek Lindnerf987ed62010-12-12 21:57:12 +0000456 &orig_node->neigh_list, list) {
Linus Lüssinge1a5382f2011-03-14 22:43:37 +0000457 seq_printf(seq, " %pM (%3i)",
458 neigh_node_tmp->addr,
459 neigh_node_tmp->tq_avg);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000460 }
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000461
462 seq_printf(seq, "\n");
463 batman_count++;
Linus Lüssinge1a5382f2011-03-14 22:43:37 +0000464
465next:
Sven Eckelmann7d211ef2012-05-12 02:09:34 +0200466 batadv_neigh_node_free_ref(neigh_node);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000467 }
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000468 rcu_read_unlock();
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000469 }
470
Linus Lüssinge1a5382f2011-03-14 22:43:37 +0000471 if (batman_count == 0)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000472 seq_printf(seq, "No batman nodes in range ...\n");
473
Marek Lindner32ae9b22011-04-20 15:40:58 +0200474out:
475 if (primary_if)
Sven Eckelmanne5d89252012-05-12 13:48:54 +0200476 batadv_hardif_free_ref(primary_if);
Marek Lindner30da63a2012-08-03 17:15:46 +0200477 return 0;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000478}
479
Sven Eckelmann56303d32012-06-05 22:31:31 +0200480static int batadv_orig_node_add_if(struct batadv_orig_node *orig_node,
481 int max_if_num)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000482{
483 void *data_ptr;
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200484 size_t data_size, old_size;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000485
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200486 data_size = max_if_num * sizeof(unsigned long) * BATADV_NUM_WORDS;
487 old_size = (max_if_num - 1) * sizeof(unsigned long) * BATADV_NUM_WORDS;
488 data_ptr = kmalloc(data_size, GFP_ATOMIC);
Joe Perches320f4222011-08-29 14:17:24 -0700489 if (!data_ptr)
Sven Eckelmann5346c352012-05-05 13:27:28 +0200490 return -ENOMEM;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000491
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200492 memcpy(data_ptr, orig_node->bcast_own, old_size);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000493 kfree(orig_node->bcast_own);
494 orig_node->bcast_own = data_ptr;
495
496 data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC);
Joe Perches320f4222011-08-29 14:17:24 -0700497 if (!data_ptr)
Sven Eckelmann5346c352012-05-05 13:27:28 +0200498 return -ENOMEM;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000499
500 memcpy(data_ptr, orig_node->bcast_own_sum,
501 (max_if_num - 1) * sizeof(uint8_t));
502 kfree(orig_node->bcast_own_sum);
503 orig_node->bcast_own_sum = data_ptr;
504
505 return 0;
506}
507
Sven Eckelmann56303d32012-06-05 22:31:31 +0200508int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface,
509 int max_if_num)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000510{
Sven Eckelmann56303d32012-06-05 22:31:31 +0200511 struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
Sven Eckelmann5bf74e92012-06-05 22:31:28 +0200512 struct batadv_hashtable *hash = bat_priv->orig_hash;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000513 struct hlist_head *head;
Sven Eckelmann56303d32012-06-05 22:31:31 +0200514 struct batadv_orig_node *orig_node;
Antonio Quartullic90681b2011-10-05 17:05:25 +0200515 uint32_t i;
516 int ret;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000517
518 /* resize all orig nodes because orig_node->bcast_own(_sum) depend on
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +0200519 * if_num
520 */
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000521 for (i = 0; i < hash->size; i++) {
522 head = &hash->table[i];
523
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000524 rcu_read_lock();
Sasha Levinb67bfe02013-02-27 17:06:00 -0800525 hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
Marek Lindner2ae2daf2011-01-19 20:01:42 +0000526 spin_lock_bh(&orig_node->ogm_cnt_lock);
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200527 ret = batadv_orig_node_add_if(orig_node, max_if_num);
Marek Lindner2ae2daf2011-01-19 20:01:42 +0000528 spin_unlock_bh(&orig_node->ogm_cnt_lock);
529
Sven Eckelmann5346c352012-05-05 13:27:28 +0200530 if (ret == -ENOMEM)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000531 goto err;
532 }
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000533 rcu_read_unlock();
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000534 }
535
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000536 return 0;
537
538err:
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000539 rcu_read_unlock();
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000540 return -ENOMEM;
541}
542
Sven Eckelmann56303d32012-06-05 22:31:31 +0200543static int batadv_orig_node_del_if(struct batadv_orig_node *orig_node,
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200544 int max_if_num, int del_if_num)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000545{
546 void *data_ptr = NULL;
547 int chunk_size;
548
549 /* last interface was removed */
550 if (max_if_num == 0)
551 goto free_bcast_own;
552
Sven Eckelmann42d0b042012-06-03 22:19:17 +0200553 chunk_size = sizeof(unsigned long) * BATADV_NUM_WORDS;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000554 data_ptr = kmalloc(max_if_num * chunk_size, GFP_ATOMIC);
Joe Perches320f4222011-08-29 14:17:24 -0700555 if (!data_ptr)
Sven Eckelmann5346c352012-05-05 13:27:28 +0200556 return -ENOMEM;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000557
558 /* copy first part */
559 memcpy(data_ptr, orig_node->bcast_own, del_if_num * chunk_size);
560
561 /* copy second part */
Sven Eckelmann38e3c5f2011-05-14 23:14:49 +0200562 memcpy((char *)data_ptr + del_if_num * chunk_size,
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000563 orig_node->bcast_own + ((del_if_num + 1) * chunk_size),
564 (max_if_num - del_if_num) * chunk_size);
565
566free_bcast_own:
567 kfree(orig_node->bcast_own);
568 orig_node->bcast_own = data_ptr;
569
570 if (max_if_num == 0)
571 goto free_own_sum;
572
573 data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC);
Joe Perches320f4222011-08-29 14:17:24 -0700574 if (!data_ptr)
Sven Eckelmann5346c352012-05-05 13:27:28 +0200575 return -ENOMEM;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000576
577 memcpy(data_ptr, orig_node->bcast_own_sum,
578 del_if_num * sizeof(uint8_t));
579
Sven Eckelmann38e3c5f2011-05-14 23:14:49 +0200580 memcpy((char *)data_ptr + del_if_num * sizeof(uint8_t),
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000581 orig_node->bcast_own_sum + ((del_if_num + 1) * sizeof(uint8_t)),
582 (max_if_num - del_if_num) * sizeof(uint8_t));
583
584free_own_sum:
585 kfree(orig_node->bcast_own_sum);
586 orig_node->bcast_own_sum = data_ptr;
587
588 return 0;
589}
590
Sven Eckelmann56303d32012-06-05 22:31:31 +0200591int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface,
592 int max_if_num)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000593{
Sven Eckelmann56303d32012-06-05 22:31:31 +0200594 struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
Sven Eckelmann5bf74e92012-06-05 22:31:28 +0200595 struct batadv_hashtable *hash = bat_priv->orig_hash;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000596 struct hlist_head *head;
Sven Eckelmann56303d32012-06-05 22:31:31 +0200597 struct batadv_hard_iface *hard_iface_tmp;
598 struct batadv_orig_node *orig_node;
Antonio Quartullic90681b2011-10-05 17:05:25 +0200599 uint32_t i;
600 int ret;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000601
602 /* resize all orig nodes because orig_node->bcast_own(_sum) depend on
Sven Eckelmann9cfc7bd2012-05-12 02:09:43 +0200603 * if_num
604 */
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000605 for (i = 0; i < hash->size; i++) {
606 head = &hash->table[i];
607
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000608 rcu_read_lock();
Sasha Levinb67bfe02013-02-27 17:06:00 -0800609 hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
Marek Lindner2ae2daf2011-01-19 20:01:42 +0000610 spin_lock_bh(&orig_node->ogm_cnt_lock);
Sven Eckelmann03fc7f82012-05-12 18:34:00 +0200611 ret = batadv_orig_node_del_if(orig_node, max_if_num,
612 hard_iface->if_num);
Marek Lindner2ae2daf2011-01-19 20:01:42 +0000613 spin_unlock_bh(&orig_node->ogm_cnt_lock);
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000614
Sven Eckelmann5346c352012-05-05 13:27:28 +0200615 if (ret == -ENOMEM)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000616 goto err;
617 }
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000618 rcu_read_unlock();
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000619 }
620
621 /* renumber remaining batman interfaces _inside_ of orig_hash_lock */
622 rcu_read_lock();
Sven Eckelmann3193e8f2012-05-12 02:09:42 +0200623 list_for_each_entry_rcu(hard_iface_tmp, &batadv_hardif_list, list) {
Sven Eckelmanne9a4f292012-06-03 22:19:19 +0200624 if (hard_iface_tmp->if_status == BATADV_IF_NOT_IN_USE)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000625 continue;
626
Marek Lindnere6c10f42011-02-18 12:33:20 +0000627 if (hard_iface == hard_iface_tmp)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000628 continue;
629
Marek Lindnere6c10f42011-02-18 12:33:20 +0000630 if (hard_iface->soft_iface != hard_iface_tmp->soft_iface)
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000631 continue;
632
Marek Lindnere6c10f42011-02-18 12:33:20 +0000633 if (hard_iface_tmp->if_num > hard_iface->if_num)
634 hard_iface_tmp->if_num--;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000635 }
636 rcu_read_unlock();
637
Marek Lindnere6c10f42011-02-18 12:33:20 +0000638 hard_iface->if_num = -1;
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000639 return 0;
640
641err:
Marek Lindnerfb778ea2011-01-19 20:01:40 +0000642 rcu_read_unlock();
Sven Eckelmannc6c8fea2010-12-13 11:19:28 +0000643 return -ENOMEM;
644}