1 /* Copyright (C) 2009-2013 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 "distributed-arp-table.h"
22 #include "originator.h"
24 #include "translation-table.h"
26 #include "gateway_client.h"
27 #include "hard-interface.h"
28 #include "soft-interface.h"
29 #include "bridge_loop_avoidance.h"
30 #include "network-coding.h"
31 #include "fragmentation.h"
34 static struct lock_class_key batadv_orig_hash_lock_class_key;
36 static void batadv_purge_orig(struct work_struct *work);
38 /* returns 1 if they are the same originator */
39 int batadv_compare_orig(const struct hlist_node *node, const void *data2)
41 const void *data1 = container_of(node, struct batadv_orig_node,
44 return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0);
48 * batadv_orig_node_vlan_get - get an orig_node_vlan object
49 * @orig_node: the originator serving the VLAN
50 * @vid: the VLAN identifier
52 * Returns the vlan object identified by vid and belonging to orig_node or NULL
53 * if it does not exist.
55 struct batadv_orig_node_vlan *
56 batadv_orig_node_vlan_get(struct batadv_orig_node *orig_node,
59 struct batadv_orig_node_vlan *vlan = NULL, *tmp;
62 list_for_each_entry_rcu(tmp, &orig_node->vlan_list, list) {
66 if (!atomic_inc_not_zero(&tmp->refcount))
79 * batadv_orig_node_vlan_new - search and possibly create an orig_node_vlan
81 * @orig_node: the originator serving the VLAN
82 * @vid: the VLAN identifier
84 * Returns NULL in case of failure or the vlan object identified by vid and
85 * belonging to orig_node otherwise. The object is created and added to the list
86 * if it does not exist.
88 * The object is returned with refcounter increased by 1.
90 struct batadv_orig_node_vlan *
91 batadv_orig_node_vlan_new(struct batadv_orig_node *orig_node,
94 struct batadv_orig_node_vlan *vlan;
96 spin_lock_bh(&orig_node->vlan_list_lock);
98 /* first look if an object for this vid already exists */
99 vlan = batadv_orig_node_vlan_get(orig_node, vid);
103 vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC);
107 atomic_set(&vlan->refcount, 2);
110 list_add_rcu(&vlan->list, &orig_node->vlan_list);
113 spin_unlock_bh(&orig_node->vlan_list_lock);
119 * batadv_orig_node_vlan_free_ref - decrement the refcounter and possibly free
120 * the originator-vlan object
121 * @orig_vlan: the originator-vlan object to release
123 void batadv_orig_node_vlan_free_ref(struct batadv_orig_node_vlan *orig_vlan)
125 if (atomic_dec_and_test(&orig_vlan->refcount))
126 kfree_rcu(orig_vlan, rcu);
129 int batadv_originator_init(struct batadv_priv *bat_priv)
131 if (bat_priv->orig_hash)
134 bat_priv->orig_hash = batadv_hash_new(1024);
136 if (!bat_priv->orig_hash)
139 batadv_hash_set_lock_class(bat_priv->orig_hash,
140 &batadv_orig_hash_lock_class_key);
142 INIT_DELAYED_WORK(&bat_priv->orig_work, batadv_purge_orig);
143 queue_delayed_work(batadv_event_workqueue,
144 &bat_priv->orig_work,
145 msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD));
153 void batadv_neigh_node_free_ref(struct batadv_neigh_node *neigh_node)
155 if (atomic_dec_and_test(&neigh_node->refcount))
156 kfree_rcu(neigh_node, rcu);
159 /* increases the refcounter of a found router */
160 struct batadv_neigh_node *
161 batadv_orig_node_get_router(struct batadv_orig_node *orig_node)
163 struct batadv_neigh_node *router;
166 router = rcu_dereference(orig_node->router);
168 if (router && !atomic_inc_not_zero(&router->refcount))
176 * batadv_neigh_node_new - create and init a new neigh_node object
177 * @hard_iface: the interface where the neighbour is connected to
178 * @neigh_addr: the mac address of the neighbour interface
179 * @orig_node: originator object representing the neighbour
181 * Allocates a new neigh_node object and initialises all the generic fields.
182 * Returns the new object or NULL on failure.
184 struct batadv_neigh_node *
185 batadv_neigh_node_new(struct batadv_hard_iface *hard_iface,
186 const uint8_t *neigh_addr,
187 struct batadv_orig_node *orig_node)
189 struct batadv_neigh_node *neigh_node;
191 neigh_node = kzalloc(sizeof(*neigh_node), GFP_ATOMIC);
195 INIT_HLIST_NODE(&neigh_node->list);
197 memcpy(neigh_node->addr, neigh_addr, ETH_ALEN);
198 neigh_node->if_incoming = hard_iface;
199 neigh_node->orig_node = orig_node;
201 INIT_LIST_HEAD(&neigh_node->bonding_list);
203 /* extra reference for return */
204 atomic_set(&neigh_node->refcount, 2);
210 static void batadv_orig_node_free_rcu(struct rcu_head *rcu)
212 struct hlist_node *node_tmp;
213 struct batadv_neigh_node *neigh_node, *tmp_neigh_node;
214 struct batadv_orig_node *orig_node;
216 orig_node = container_of(rcu, struct batadv_orig_node, rcu);
218 spin_lock_bh(&orig_node->neigh_list_lock);
220 /* for all bonding members ... */
221 list_for_each_entry_safe(neigh_node, tmp_neigh_node,
222 &orig_node->bond_list, bonding_list) {
223 list_del_rcu(&neigh_node->bonding_list);
224 batadv_neigh_node_free_ref(neigh_node);
227 /* for all neighbors towards this originator ... */
228 hlist_for_each_entry_safe(neigh_node, node_tmp,
229 &orig_node->neigh_list, list) {
230 hlist_del_rcu(&neigh_node->list);
231 batadv_neigh_node_free_ref(neigh_node);
234 spin_unlock_bh(&orig_node->neigh_list_lock);
237 batadv_nc_purge_orig(orig_node->bat_priv, orig_node, NULL);
239 batadv_frag_purge_orig(orig_node, NULL);
241 batadv_tt_global_del_orig(orig_node->bat_priv, orig_node, -1,
242 "originator timed out");
244 kfree(orig_node->tt_buff);
245 kfree(orig_node->bat_iv.bcast_own);
246 kfree(orig_node->bat_iv.bcast_own_sum);
251 * batadv_orig_node_free_ref - decrement the orig node refcounter and possibly
252 * schedule an rcu callback for freeing it
253 * @orig_node: the orig node to free
255 void batadv_orig_node_free_ref(struct batadv_orig_node *orig_node)
257 if (atomic_dec_and_test(&orig_node->refcount))
258 call_rcu(&orig_node->rcu, batadv_orig_node_free_rcu);
262 * batadv_orig_node_free_ref_now - decrement the orig node refcounter and
263 * possibly free it (without rcu callback)
264 * @orig_node: the orig node to free
266 void batadv_orig_node_free_ref_now(struct batadv_orig_node *orig_node)
268 if (atomic_dec_and_test(&orig_node->refcount))
269 batadv_orig_node_free_rcu(&orig_node->rcu);
272 void batadv_originator_free(struct batadv_priv *bat_priv)
274 struct batadv_hashtable *hash = bat_priv->orig_hash;
275 struct hlist_node *node_tmp;
276 struct hlist_head *head;
277 spinlock_t *list_lock; /* spinlock to protect write access */
278 struct batadv_orig_node *orig_node;
284 cancel_delayed_work_sync(&bat_priv->orig_work);
286 bat_priv->orig_hash = NULL;
288 for (i = 0; i < hash->size; i++) {
289 head = &hash->table[i];
290 list_lock = &hash->list_locks[i];
292 spin_lock_bh(list_lock);
293 hlist_for_each_entry_safe(orig_node, node_tmp,
295 hlist_del_rcu(&orig_node->hash_entry);
296 batadv_orig_node_free_ref(orig_node);
298 spin_unlock_bh(list_lock);
301 batadv_hash_destroy(hash);
305 * batadv_orig_node_new - creates a new orig_node
306 * @bat_priv: the bat priv with all the soft interface information
307 * @addr: the mac address of the originator
309 * Creates a new originator object and initialise all the generic fields.
310 * The new object is not added to the originator list.
311 * Returns the newly created object or NULL on failure.
313 struct batadv_orig_node *batadv_orig_node_new(struct batadv_priv *bat_priv,
316 struct batadv_orig_node *orig_node;
317 struct batadv_orig_node_vlan *vlan;
318 unsigned long reset_time;
321 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
322 "Creating new originator: %pM\n", addr);
324 orig_node = kzalloc(sizeof(*orig_node), GFP_ATOMIC);
328 INIT_HLIST_HEAD(&orig_node->neigh_list);
329 INIT_LIST_HEAD(&orig_node->bond_list);
330 INIT_LIST_HEAD(&orig_node->vlan_list);
331 spin_lock_init(&orig_node->bcast_seqno_lock);
332 spin_lock_init(&orig_node->neigh_list_lock);
333 spin_lock_init(&orig_node->tt_buff_lock);
334 spin_lock_init(&orig_node->tt_lock);
335 spin_lock_init(&orig_node->vlan_list_lock);
337 batadv_nc_init_orig(orig_node);
339 /* extra reference for return */
340 atomic_set(&orig_node->refcount, 2);
342 orig_node->tt_initialised = false;
343 orig_node->bat_priv = bat_priv;
344 memcpy(orig_node->orig, addr, ETH_ALEN);
345 batadv_dat_init_orig_node_addr(orig_node);
346 orig_node->router = NULL;
347 atomic_set(&orig_node->last_ttvn, 0);
348 orig_node->tt_buff = NULL;
349 orig_node->tt_buff_len = 0;
350 reset_time = jiffies - 1 - msecs_to_jiffies(BATADV_RESET_PROTECTION_MS);
351 orig_node->bcast_seqno_reset = reset_time;
352 orig_node->batman_seqno_reset = reset_time;
354 atomic_set(&orig_node->bond_candidates, 0);
356 /* create a vlan object for the "untagged" LAN */
357 vlan = batadv_orig_node_vlan_new(orig_node, BATADV_NO_FLAGS);
360 /* batadv_orig_node_vlan_new() increases the refcounter.
361 * Immediately release vlan since it is not needed anymore in this
364 batadv_orig_node_vlan_free_ref(vlan);
366 for (i = 0; i < BATADV_FRAG_BUFFER_COUNT; i++) {
367 INIT_HLIST_HEAD(&orig_node->fragments[i].head);
368 spin_lock_init(&orig_node->fragments[i].lock);
369 orig_node->fragments[i].size = 0;
379 batadv_purge_orig_neighbors(struct batadv_priv *bat_priv,
380 struct batadv_orig_node *orig_node,
381 struct batadv_neigh_node **best_neigh_node)
383 struct hlist_node *node_tmp;
384 struct batadv_neigh_node *neigh_node;
385 bool neigh_purged = false;
386 unsigned long last_seen;
387 struct batadv_hard_iface *if_incoming;
388 uint8_t best_metric = 0;
390 *best_neigh_node = NULL;
392 spin_lock_bh(&orig_node->neigh_list_lock);
394 /* for all neighbors towards this originator ... */
395 hlist_for_each_entry_safe(neigh_node, node_tmp,
396 &orig_node->neigh_list, list) {
397 last_seen = neigh_node->last_seen;
398 if_incoming = neigh_node->if_incoming;
400 if ((batadv_has_timed_out(last_seen, BATADV_PURGE_TIMEOUT)) ||
401 (if_incoming->if_status == BATADV_IF_INACTIVE) ||
402 (if_incoming->if_status == BATADV_IF_NOT_IN_USE) ||
403 (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) {
404 if ((if_incoming->if_status == BATADV_IF_INACTIVE) ||
405 (if_incoming->if_status == BATADV_IF_NOT_IN_USE) ||
406 (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED))
407 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
408 "neighbor purge: originator %pM, neighbor: %pM, iface: %s\n",
409 orig_node->orig, neigh_node->addr,
410 if_incoming->net_dev->name);
412 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
413 "neighbor timeout: originator %pM, neighbor: %pM, last_seen: %u\n",
414 orig_node->orig, neigh_node->addr,
415 jiffies_to_msecs(last_seen));
419 hlist_del_rcu(&neigh_node->list);
420 batadv_bonding_candidate_del(orig_node, neigh_node);
421 batadv_neigh_node_free_ref(neigh_node);
423 if ((!*best_neigh_node) ||
424 (neigh_node->bat_iv.tq_avg > best_metric)) {
425 *best_neigh_node = neigh_node;
426 best_metric = neigh_node->bat_iv.tq_avg;
431 spin_unlock_bh(&orig_node->neigh_list_lock);
435 static bool batadv_purge_orig_node(struct batadv_priv *bat_priv,
436 struct batadv_orig_node *orig_node)
438 struct batadv_neigh_node *best_neigh_node;
440 if (batadv_has_timed_out(orig_node->last_seen,
441 2 * BATADV_PURGE_TIMEOUT)) {
442 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
443 "Originator timeout: originator %pM, last_seen %u\n",
445 jiffies_to_msecs(orig_node->last_seen));
448 if (batadv_purge_orig_neighbors(bat_priv, orig_node,
450 batadv_update_route(bat_priv, orig_node,
457 static void _batadv_purge_orig(struct batadv_priv *bat_priv)
459 struct batadv_hashtable *hash = bat_priv->orig_hash;
460 struct hlist_node *node_tmp;
461 struct hlist_head *head;
462 spinlock_t *list_lock; /* spinlock to protect write access */
463 struct batadv_orig_node *orig_node;
469 /* for all origins... */
470 for (i = 0; i < hash->size; i++) {
471 head = &hash->table[i];
472 list_lock = &hash->list_locks[i];
474 spin_lock_bh(list_lock);
475 hlist_for_each_entry_safe(orig_node, node_tmp,
477 if (batadv_purge_orig_node(bat_priv, orig_node)) {
478 batadv_gw_node_delete(bat_priv, orig_node);
479 hlist_del_rcu(&orig_node->hash_entry);
480 batadv_orig_node_free_ref(orig_node);
484 batadv_frag_purge_orig(orig_node,
485 batadv_frag_check_entry);
487 spin_unlock_bh(list_lock);
490 batadv_gw_node_purge(bat_priv);
491 batadv_gw_election(bat_priv);
494 static void batadv_purge_orig(struct work_struct *work)
496 struct delayed_work *delayed_work;
497 struct batadv_priv *bat_priv;
499 delayed_work = container_of(work, struct delayed_work, work);
500 bat_priv = container_of(delayed_work, struct batadv_priv, orig_work);
501 _batadv_purge_orig(bat_priv);
502 queue_delayed_work(batadv_event_workqueue,
503 &bat_priv->orig_work,
504 msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD));
507 void batadv_purge_orig_ref(struct batadv_priv *bat_priv)
509 _batadv_purge_orig(bat_priv);
512 int batadv_orig_seq_print_text(struct seq_file *seq, void *offset)
514 struct net_device *net_dev = (struct net_device *)seq->private;
515 struct batadv_priv *bat_priv = netdev_priv(net_dev);
516 struct batadv_hard_iface *primary_if;
518 primary_if = batadv_seq_print_text_primary_if_get(seq);
522 seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n",
523 BATADV_SOURCE_VERSION, primary_if->net_dev->name,
524 primary_if->net_dev->dev_addr, net_dev->name,
525 bat_priv->bat_algo_ops->name);
527 batadv_hardif_free_ref(primary_if);
529 if (!bat_priv->bat_algo_ops->bat_orig_print) {
531 "No printing function for this routing protocol\n");
535 bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq);
540 static int batadv_orig_node_add_if(struct batadv_orig_node *orig_node,
544 size_t data_size, old_size;
546 data_size = max_if_num * sizeof(unsigned long) * BATADV_NUM_WORDS;
547 old_size = (max_if_num - 1) * sizeof(unsigned long) * BATADV_NUM_WORDS;
548 data_ptr = kmalloc(data_size, GFP_ATOMIC);
552 memcpy(data_ptr, orig_node->bat_iv.bcast_own, old_size);
553 kfree(orig_node->bat_iv.bcast_own);
554 orig_node->bat_iv.bcast_own = data_ptr;
556 data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC);
560 memcpy(data_ptr, orig_node->bat_iv.bcast_own_sum,
561 (max_if_num - 1) * sizeof(uint8_t));
562 kfree(orig_node->bat_iv.bcast_own_sum);
563 orig_node->bat_iv.bcast_own_sum = data_ptr;
568 int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface,
571 struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
572 struct batadv_hashtable *hash = bat_priv->orig_hash;
573 struct hlist_head *head;
574 struct batadv_orig_node *orig_node;
578 /* resize all orig nodes because orig_node->bcast_own(_sum) depend on
581 for (i = 0; i < hash->size; i++) {
582 head = &hash->table[i];
585 hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
586 spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock);
587 ret = batadv_orig_node_add_if(orig_node, max_if_num);
588 spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock);
603 static int batadv_orig_node_del_if(struct batadv_orig_node *orig_node,
604 int max_if_num, int del_if_num)
606 int chunk_size, if_offset;
607 void *data_ptr = NULL;
609 /* last interface was removed */
613 chunk_size = sizeof(unsigned long) * BATADV_NUM_WORDS;
614 data_ptr = kmalloc(max_if_num * chunk_size, GFP_ATOMIC);
618 /* copy first part */
619 memcpy(data_ptr, orig_node->bat_iv.bcast_own, del_if_num * chunk_size);
621 /* copy second part */
622 memcpy((char *)data_ptr + del_if_num * chunk_size,
623 orig_node->bat_iv.bcast_own + ((del_if_num + 1) * chunk_size),
624 (max_if_num - del_if_num) * chunk_size);
627 kfree(orig_node->bat_iv.bcast_own);
628 orig_node->bat_iv.bcast_own = data_ptr;
633 data_ptr = kmalloc(max_if_num * sizeof(uint8_t), GFP_ATOMIC);
637 memcpy(data_ptr, orig_node->bat_iv.bcast_own_sum,
638 del_if_num * sizeof(uint8_t));
640 if_offset = (del_if_num + 1) * sizeof(uint8_t);
641 memcpy((char *)data_ptr + del_if_num * sizeof(uint8_t),
642 orig_node->bat_iv.bcast_own_sum + if_offset,
643 (max_if_num - del_if_num) * sizeof(uint8_t));
646 kfree(orig_node->bat_iv.bcast_own_sum);
647 orig_node->bat_iv.bcast_own_sum = data_ptr;
652 int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface,
655 struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
656 struct batadv_hashtable *hash = bat_priv->orig_hash;
657 struct hlist_head *head;
658 struct batadv_hard_iface *hard_iface_tmp;
659 struct batadv_orig_node *orig_node;
663 /* resize all orig nodes because orig_node->bcast_own(_sum) depend on
666 for (i = 0; i < hash->size; i++) {
667 head = &hash->table[i];
670 hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
671 spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock);
672 ret = batadv_orig_node_del_if(orig_node, max_if_num,
674 spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock);
682 /* renumber remaining batman interfaces _inside_ of orig_hash_lock */
684 list_for_each_entry_rcu(hard_iface_tmp, &batadv_hardif_list, list) {
685 if (hard_iface_tmp->if_status == BATADV_IF_NOT_IN_USE)
688 if (hard_iface == hard_iface_tmp)
691 if (hard_iface->soft_iface != hard_iface_tmp->soft_iface)
694 if (hard_iface_tmp->if_num > hard_iface->if_num)
695 hard_iface_tmp->if_num--;
699 hard_iface->if_num = -1;