1 /* Copyright (C) 2009-2012 B.A.T.M.A.N. contributors:
3 * Marek Lindner, Simon Wunderlich
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.
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.
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
21 #include "originator.h"
23 #include "translation-table.h"
25 #include "gateway_client.h"
26 #include "hard-interface.h"
28 #include "soft-interface.h"
29 #include "bridge_loop_avoidance.h"
31 static void batadv_purge_orig(struct work_struct *work);
33 static void batadv_start_purge_timer(struct bat_priv *bat_priv)
35 INIT_DELAYED_WORK(&bat_priv->orig_work, batadv_purge_orig);
36 queue_delayed_work(batadv_event_workqueue,
37 &bat_priv->orig_work, msecs_to_jiffies(1000));
40 /* returns 1 if they are the same originator */
41 static int batadv_compare_orig(const struct hlist_node *node, const void *data2)
43 const void *data1 = container_of(node, struct orig_node, hash_entry);
45 return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0);
48 int batadv_originator_init(struct bat_priv *bat_priv)
50 if (bat_priv->orig_hash)
53 bat_priv->orig_hash = batadv_hash_new(1024);
55 if (!bat_priv->orig_hash)
58 batadv_start_purge_timer(bat_priv);
65 void batadv_neigh_node_free_ref(struct neigh_node *neigh_node)
67 if (atomic_dec_and_test(&neigh_node->refcount))
68 kfree_rcu(neigh_node, rcu);
71 /* increases the refcounter of a found router */
72 struct neigh_node *batadv_orig_node_get_router(struct orig_node *orig_node)
74 struct neigh_node *router;
77 router = rcu_dereference(orig_node->router);
79 if (router && !atomic_inc_not_zero(&router->refcount))
86 struct neigh_node *batadv_neigh_node_new(struct hard_iface *hard_iface,
87 const uint8_t *neigh_addr,
90 struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
91 struct neigh_node *neigh_node;
93 neigh_node = kzalloc(sizeof(*neigh_node), GFP_ATOMIC);
97 INIT_HLIST_NODE(&neigh_node->list);
99 memcpy(neigh_node->addr, neigh_addr, ETH_ALEN);
100 spin_lock_init(&neigh_node->lq_update_lock);
102 /* extra reference for return */
103 atomic_set(&neigh_node->refcount, 2);
105 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
106 "Creating new neighbor %pM, initial seqno %d\n",
113 static void batadv_orig_node_free_rcu(struct rcu_head *rcu)
115 struct hlist_node *node, *node_tmp;
116 struct neigh_node *neigh_node, *tmp_neigh_node;
117 struct orig_node *orig_node;
119 orig_node = container_of(rcu, struct orig_node, rcu);
121 spin_lock_bh(&orig_node->neigh_list_lock);
123 /* for all bonding members ... */
124 list_for_each_entry_safe(neigh_node, tmp_neigh_node,
125 &orig_node->bond_list, bonding_list) {
126 list_del_rcu(&neigh_node->bonding_list);
127 batadv_neigh_node_free_ref(neigh_node);
130 /* for all neighbors towards this originator ... */
131 hlist_for_each_entry_safe(neigh_node, node, node_tmp,
132 &orig_node->neigh_list, list) {
133 hlist_del_rcu(&neigh_node->list);
134 batadv_neigh_node_free_ref(neigh_node);
137 spin_unlock_bh(&orig_node->neigh_list_lock);
139 batadv_frag_list_free(&orig_node->frag_list);
140 batadv_tt_global_del_orig(orig_node->bat_priv, orig_node,
141 "originator timed out");
143 kfree(orig_node->tt_buff);
144 kfree(orig_node->bcast_own);
145 kfree(orig_node->bcast_own_sum);
149 void batadv_orig_node_free_ref(struct orig_node *orig_node)
151 if (atomic_dec_and_test(&orig_node->refcount))
152 call_rcu(&orig_node->rcu, batadv_orig_node_free_rcu);
155 void batadv_originator_free(struct bat_priv *bat_priv)
157 struct batadv_hashtable *hash = bat_priv->orig_hash;
158 struct hlist_node *node, *node_tmp;
159 struct hlist_head *head;
160 spinlock_t *list_lock; /* spinlock to protect write access */
161 struct orig_node *orig_node;
167 cancel_delayed_work_sync(&bat_priv->orig_work);
169 bat_priv->orig_hash = NULL;
171 for (i = 0; i < hash->size; i++) {
172 head = &hash->table[i];
173 list_lock = &hash->list_locks[i];
175 spin_lock_bh(list_lock);
176 hlist_for_each_entry_safe(orig_node, node, node_tmp,
180 batadv_orig_node_free_ref(orig_node);
182 spin_unlock_bh(list_lock);
185 batadv_hash_destroy(hash);
188 /* this function finds or creates an originator entry for the given
189 * address if it does not exits
191 struct orig_node *batadv_get_orig_node(struct bat_priv *bat_priv,
194 struct orig_node *orig_node;
197 unsigned long reset_time;
199 orig_node = batadv_orig_hash_find(bat_priv, addr);
203 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
204 "Creating new originator: %pM\n", addr);
206 orig_node = kzalloc(sizeof(*orig_node), GFP_ATOMIC);
210 INIT_HLIST_HEAD(&orig_node->neigh_list);
211 INIT_LIST_HEAD(&orig_node->bond_list);
212 spin_lock_init(&orig_node->ogm_cnt_lock);
213 spin_lock_init(&orig_node->bcast_seqno_lock);
214 spin_lock_init(&orig_node->neigh_list_lock);
215 spin_lock_init(&orig_node->tt_buff_lock);
217 /* extra reference for return */
218 atomic_set(&orig_node->refcount, 2);
220 orig_node->tt_initialised = false;
221 orig_node->tt_poss_change = false;
222 orig_node->bat_priv = bat_priv;
223 memcpy(orig_node->orig, addr, ETH_ALEN);
224 orig_node->router = NULL;
225 orig_node->tt_crc = 0;
226 atomic_set(&orig_node->last_ttvn, 0);
227 orig_node->tt_buff = NULL;
228 orig_node->tt_buff_len = 0;
229 atomic_set(&orig_node->tt_size, 0);
230 reset_time = jiffies - 1 - msecs_to_jiffies(BATADV_RESET_PROTECTION_MS);
231 orig_node->bcast_seqno_reset = reset_time;
232 orig_node->batman_seqno_reset = reset_time;
234 atomic_set(&orig_node->bond_candidates, 0);
236 size = bat_priv->num_ifaces * sizeof(unsigned long) * BATADV_NUM_WORDS;
238 orig_node->bcast_own = kzalloc(size, GFP_ATOMIC);
239 if (!orig_node->bcast_own)
242 size = bat_priv->num_ifaces * sizeof(uint8_t);
243 orig_node->bcast_own_sum = kzalloc(size, GFP_ATOMIC);
245 INIT_LIST_HEAD(&orig_node->frag_list);
246 orig_node->last_frag_packet = 0;
248 if (!orig_node->bcast_own_sum)
251 hash_added = batadv_hash_add(bat_priv->orig_hash, batadv_compare_orig,
252 batadv_choose_orig, orig_node,
253 &orig_node->hash_entry);
255 goto free_bcast_own_sum;
259 kfree(orig_node->bcast_own_sum);
261 kfree(orig_node->bcast_own);
267 static bool batadv_purge_orig_neighbors(struct bat_priv *bat_priv,
268 struct orig_node *orig_node,
269 struct neigh_node **best_neigh_node)
271 struct hlist_node *node, *node_tmp;
272 struct neigh_node *neigh_node;
273 bool neigh_purged = false;
274 unsigned long last_seen;
275 struct hard_iface *if_incoming;
277 *best_neigh_node = NULL;
279 spin_lock_bh(&orig_node->neigh_list_lock);
281 /* for all neighbors towards this originator ... */
282 hlist_for_each_entry_safe(neigh_node, node, node_tmp,
283 &orig_node->neigh_list, list) {
285 last_seen = neigh_node->last_seen;
286 if_incoming = neigh_node->if_incoming;
288 if ((batadv_has_timed_out(last_seen, BATADV_PURGE_TIMEOUT)) ||
289 (if_incoming->if_status == BATADV_IF_INACTIVE) ||
290 (if_incoming->if_status == BATADV_IF_NOT_IN_USE) ||
291 (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) {
293 if ((if_incoming->if_status == BATADV_IF_INACTIVE) ||
294 (if_incoming->if_status == BATADV_IF_NOT_IN_USE) ||
295 (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED))
296 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
297 "neighbor purge: originator %pM, neighbor: %pM, iface: %s\n",
298 orig_node->orig, neigh_node->addr,
299 if_incoming->net_dev->name);
301 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
302 "neighbor timeout: originator %pM, neighbor: %pM, last_seen: %u\n",
303 orig_node->orig, neigh_node->addr,
304 jiffies_to_msecs(last_seen));
308 hlist_del_rcu(&neigh_node->list);
309 batadv_bonding_candidate_del(orig_node, neigh_node);
310 batadv_neigh_node_free_ref(neigh_node);
312 if ((!*best_neigh_node) ||
313 (neigh_node->tq_avg > (*best_neigh_node)->tq_avg))
314 *best_neigh_node = neigh_node;
318 spin_unlock_bh(&orig_node->neigh_list_lock);
322 static bool batadv_purge_orig_node(struct bat_priv *bat_priv,
323 struct orig_node *orig_node)
325 struct neigh_node *best_neigh_node;
327 if (batadv_has_timed_out(orig_node->last_seen,
328 2 * BATADV_PURGE_TIMEOUT)) {
329 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
330 "Originator timeout: originator %pM, last_seen %u\n",
332 jiffies_to_msecs(orig_node->last_seen));
335 if (batadv_purge_orig_neighbors(bat_priv, orig_node,
337 batadv_update_route(bat_priv, orig_node,
344 static void _batadv_purge_orig(struct bat_priv *bat_priv)
346 struct batadv_hashtable *hash = bat_priv->orig_hash;
347 struct hlist_node *node, *node_tmp;
348 struct hlist_head *head;
349 spinlock_t *list_lock; /* spinlock to protect write access */
350 struct orig_node *orig_node;
356 /* for all origins... */
357 for (i = 0; i < hash->size; i++) {
358 head = &hash->table[i];
359 list_lock = &hash->list_locks[i];
361 spin_lock_bh(list_lock);
362 hlist_for_each_entry_safe(orig_node, node, node_tmp,
364 if (batadv_purge_orig_node(bat_priv, orig_node)) {
365 if (orig_node->gw_flags)
366 batadv_gw_node_delete(bat_priv,
369 batadv_orig_node_free_ref(orig_node);
373 if (batadv_has_timed_out(orig_node->last_frag_packet,
374 BATADV_FRAG_TIMEOUT))
375 batadv_frag_list_free(&orig_node->frag_list);
377 spin_unlock_bh(list_lock);
380 batadv_gw_node_purge(bat_priv);
381 batadv_gw_election(bat_priv);
384 static void batadv_purge_orig(struct work_struct *work)
386 struct delayed_work *delayed_work =
387 container_of(work, struct delayed_work, work);
388 struct bat_priv *bat_priv =
389 container_of(delayed_work, struct bat_priv, orig_work);
391 _batadv_purge_orig(bat_priv);
392 batadv_start_purge_timer(bat_priv);
395 void batadv_purge_orig_ref(struct bat_priv *bat_priv)
397 _batadv_purge_orig(bat_priv);
400 int batadv_orig_seq_print_text(struct seq_file *seq, void *offset)
402 struct net_device *net_dev = (struct net_device *)seq->private;
403 struct bat_priv *bat_priv = netdev_priv(net_dev);
404 struct batadv_hashtable *hash = bat_priv->orig_hash;
405 struct hlist_node *node, *node_tmp;
406 struct hlist_head *head;
407 struct hard_iface *primary_if;
408 struct orig_node *orig_node;
409 struct neigh_node *neigh_node, *neigh_node_tmp;
410 int batman_count = 0;
416 primary_if = batadv_primary_if_get_selected(bat_priv);
419 ret = seq_printf(seq,
420 "BATMAN mesh %s disabled - please specify interfaces to enable it\n",
425 if (primary_if->if_status != BATADV_IF_ACTIVE) {
426 ret = seq_printf(seq,
427 "BATMAN mesh %s disabled - primary interface not active\n",
432 seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s)]\n",
433 BATADV_SOURCE_VERSION, primary_if->net_dev->name,
434 primary_if->net_dev->dev_addr, net_dev->name);
435 seq_printf(seq, " %-15s %s (%s/%i) %17s [%10s]: %20s ...\n",
436 "Originator", "last-seen", "#", BATADV_TQ_MAX_VALUE,
437 "Nexthop", "outgoingIF", "Potential nexthops");
439 for (i = 0; i < hash->size; i++) {
440 head = &hash->table[i];
443 hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
444 neigh_node = batadv_orig_node_get_router(orig_node);
448 if (neigh_node->tq_avg == 0)
451 last_seen_secs = jiffies_to_msecs(jiffies -
452 orig_node->last_seen) / 1000;
453 last_seen_msecs = jiffies_to_msecs(jiffies -
454 orig_node->last_seen) % 1000;
456 seq_printf(seq, "%pM %4i.%03is (%3i) %pM [%10s]:",
457 orig_node->orig, last_seen_secs,
458 last_seen_msecs, neigh_node->tq_avg,
460 neigh_node->if_incoming->net_dev->name);
462 hlist_for_each_entry_rcu(neigh_node_tmp, node_tmp,
463 &orig_node->neigh_list, list) {
464 seq_printf(seq, " %pM (%3i)",
465 neigh_node_tmp->addr,
466 neigh_node_tmp->tq_avg);
469 seq_printf(seq, "\n");
473 batadv_neigh_node_free_ref(neigh_node);
478 if (batman_count == 0)
479 seq_printf(seq, "No batman nodes in range ...\n");
483 batadv_hardif_free_ref(primary_if);
487 static int batadv_orig_node_add_if(struct orig_node *orig_node, int max_if_num)
490 size_t data_size, old_size;
492 data_size = max_if_num * sizeof(unsigned long) * BATADV_NUM_WORDS;
493 old_size = (max_if_num - 1) * sizeof(unsigned long) * BATADV_NUM_WORDS;
494 data_ptr = kmalloc(data_size, GFP_ATOMIC);
498 memcpy(data_ptr, orig_node->bcast_own, old_size);
499 kfree(orig_node->bcast_own);
500 orig_node->bcast_own = data_ptr;
502 data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC);
506 memcpy(data_ptr, orig_node->bcast_own_sum,
507 (max_if_num - 1) * sizeof(uint8_t));
508 kfree(orig_node->bcast_own_sum);
509 orig_node->bcast_own_sum = data_ptr;
514 int batadv_orig_hash_add_if(struct hard_iface *hard_iface, int max_if_num)
516 struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
517 struct batadv_hashtable *hash = bat_priv->orig_hash;
518 struct hlist_node *node;
519 struct hlist_head *head;
520 struct orig_node *orig_node;
524 /* resize all orig nodes because orig_node->bcast_own(_sum) depend on
527 for (i = 0; i < hash->size; i++) {
528 head = &hash->table[i];
531 hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
532 spin_lock_bh(&orig_node->ogm_cnt_lock);
533 ret = batadv_orig_node_add_if(orig_node, max_if_num);
534 spin_unlock_bh(&orig_node->ogm_cnt_lock);
549 static int batadv_orig_node_del_if(struct orig_node *orig_node,
550 int max_if_num, int del_if_num)
552 void *data_ptr = NULL;
555 /* last interface was removed */
559 chunk_size = sizeof(unsigned long) * BATADV_NUM_WORDS;
560 data_ptr = kmalloc(max_if_num * chunk_size, GFP_ATOMIC);
564 /* copy first part */
565 memcpy(data_ptr, orig_node->bcast_own, del_if_num * chunk_size);
567 /* copy second part */
568 memcpy((char *)data_ptr + del_if_num * chunk_size,
569 orig_node->bcast_own + ((del_if_num + 1) * chunk_size),
570 (max_if_num - del_if_num) * chunk_size);
573 kfree(orig_node->bcast_own);
574 orig_node->bcast_own = data_ptr;
579 data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC);
583 memcpy(data_ptr, orig_node->bcast_own_sum,
584 del_if_num * sizeof(uint8_t));
586 memcpy((char *)data_ptr + del_if_num * sizeof(uint8_t),
587 orig_node->bcast_own_sum + ((del_if_num + 1) * sizeof(uint8_t)),
588 (max_if_num - del_if_num) * sizeof(uint8_t));
591 kfree(orig_node->bcast_own_sum);
592 orig_node->bcast_own_sum = data_ptr;
597 int batadv_orig_hash_del_if(struct hard_iface *hard_iface, int max_if_num)
599 struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
600 struct batadv_hashtable *hash = bat_priv->orig_hash;
601 struct hlist_node *node;
602 struct hlist_head *head;
603 struct hard_iface *hard_iface_tmp;
604 struct orig_node *orig_node;
608 /* resize all orig nodes because orig_node->bcast_own(_sum) depend on
611 for (i = 0; i < hash->size; i++) {
612 head = &hash->table[i];
615 hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
616 spin_lock_bh(&orig_node->ogm_cnt_lock);
617 ret = batadv_orig_node_del_if(orig_node, max_if_num,
619 spin_unlock_bh(&orig_node->ogm_cnt_lock);
627 /* renumber remaining batman interfaces _inside_ of orig_hash_lock */
629 list_for_each_entry_rcu(hard_iface_tmp, &batadv_hardif_list, list) {
630 if (hard_iface_tmp->if_status == BATADV_IF_NOT_IN_USE)
633 if (hard_iface == hard_iface_tmp)
636 if (hard_iface->soft_iface != hard_iface_tmp->soft_iface)
639 if (hard_iface_tmp->if_num > hard_iface->if_num)
640 hard_iface_tmp->if_num--;
644 hard_iface->if_num = -1;