1 /* Copyright (C) 2009-2015 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, see <http://www.gnu.org/licenses/>.
18 #include "originator.h"
21 #include <linux/errno.h>
22 #include <linux/etherdevice.h>
24 #include <linux/jiffies.h>
25 #include <linux/kernel.h>
26 #include <linux/list.h>
27 #include <linux/lockdep.h>
28 #include <linux/netdevice.h>
29 #include <linux/rculist.h>
30 #include <linux/seq_file.h>
31 #include <linux/slab.h>
32 #include <linux/spinlock.h>
33 #include <linux/workqueue.h>
35 #include "distributed-arp-table.h"
36 #include "fragmentation.h"
37 #include "gateway_client.h"
38 #include "hard-interface.h"
40 #include "multicast.h"
41 #include "network-coding.h"
43 #include "translation-table.h"
46 static struct lock_class_key batadv_orig_hash_lock_class_key;
48 static void batadv_purge_orig(struct work_struct *work);
50 /* returns 1 if they are the same originator */
51 int batadv_compare_orig(const struct hlist_node *node, const void *data2)
53 const void *data1 = container_of(node, struct batadv_orig_node,
56 return batadv_compare_eth(data1, data2);
60 * batadv_orig_node_vlan_get - get an orig_node_vlan object
61 * @orig_node: the originator serving the VLAN
62 * @vid: the VLAN identifier
64 * Returns the vlan object identified by vid and belonging to orig_node or NULL
65 * if it does not exist.
67 struct batadv_orig_node_vlan *
68 batadv_orig_node_vlan_get(struct batadv_orig_node *orig_node,
71 struct batadv_orig_node_vlan *vlan = NULL, *tmp;
74 hlist_for_each_entry_rcu(tmp, &orig_node->vlan_list, list) {
78 if (!atomic_inc_not_zero(&tmp->refcount))
91 * batadv_orig_node_vlan_new - search and possibly create an orig_node_vlan
93 * @orig_node: the originator serving the VLAN
94 * @vid: the VLAN identifier
96 * Returns NULL in case of failure or the vlan object identified by vid and
97 * belonging to orig_node otherwise. The object is created and added to the list
98 * if it does not exist.
100 * The object is returned with refcounter increased by 1.
102 struct batadv_orig_node_vlan *
103 batadv_orig_node_vlan_new(struct batadv_orig_node *orig_node,
106 struct batadv_orig_node_vlan *vlan;
108 spin_lock_bh(&orig_node->vlan_list_lock);
110 /* first look if an object for this vid already exists */
111 vlan = batadv_orig_node_vlan_get(orig_node, vid);
115 vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC);
119 atomic_set(&vlan->refcount, 2);
122 hlist_add_head_rcu(&vlan->list, &orig_node->vlan_list);
125 spin_unlock_bh(&orig_node->vlan_list_lock);
131 * batadv_orig_node_vlan_free_ref - decrement the refcounter and possibly free
132 * the originator-vlan object
133 * @orig_vlan: the originator-vlan object to release
135 void batadv_orig_node_vlan_free_ref(struct batadv_orig_node_vlan *orig_vlan)
137 if (atomic_dec_and_test(&orig_vlan->refcount))
138 kfree_rcu(orig_vlan, rcu);
141 int batadv_originator_init(struct batadv_priv *bat_priv)
143 if (bat_priv->orig_hash)
146 bat_priv->orig_hash = batadv_hash_new(1024);
148 if (!bat_priv->orig_hash)
151 batadv_hash_set_lock_class(bat_priv->orig_hash,
152 &batadv_orig_hash_lock_class_key);
154 INIT_DELAYED_WORK(&bat_priv->orig_work, batadv_purge_orig);
155 queue_delayed_work(batadv_event_workqueue,
156 &bat_priv->orig_work,
157 msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD));
166 * batadv_neigh_ifinfo_free_rcu - free the neigh_ifinfo object
167 * @rcu: rcu pointer of the neigh_ifinfo object
169 static void batadv_neigh_ifinfo_free_rcu(struct rcu_head *rcu)
171 struct batadv_neigh_ifinfo *neigh_ifinfo;
173 neigh_ifinfo = container_of(rcu, struct batadv_neigh_ifinfo, rcu);
175 if (neigh_ifinfo->if_outgoing != BATADV_IF_DEFAULT)
176 batadv_hardif_free_ref_now(neigh_ifinfo->if_outgoing);
182 * batadv_neigh_ifinfo_free_now - decrement the refcounter and possibly free
183 * the neigh_ifinfo (without rcu callback)
184 * @neigh_ifinfo: the neigh_ifinfo object to release
187 batadv_neigh_ifinfo_free_ref_now(struct batadv_neigh_ifinfo *neigh_ifinfo)
189 if (atomic_dec_and_test(&neigh_ifinfo->refcount))
190 batadv_neigh_ifinfo_free_rcu(&neigh_ifinfo->rcu);
194 * batadv_neigh_ifinfo_free_ref - decrement the refcounter and possibly free
196 * @neigh_ifinfo: the neigh_ifinfo object to release
198 void batadv_neigh_ifinfo_free_ref(struct batadv_neigh_ifinfo *neigh_ifinfo)
200 if (atomic_dec_and_test(&neigh_ifinfo->refcount))
201 call_rcu(&neigh_ifinfo->rcu, batadv_neigh_ifinfo_free_rcu);
205 * batadv_neigh_node_free_rcu - free the neigh_node
206 * @rcu: rcu pointer of the neigh_node
208 static void batadv_neigh_node_free_rcu(struct rcu_head *rcu)
210 struct hlist_node *node_tmp;
211 struct batadv_neigh_node *neigh_node;
212 struct batadv_neigh_ifinfo *neigh_ifinfo;
213 struct batadv_algo_ops *bao;
215 neigh_node = container_of(rcu, struct batadv_neigh_node, rcu);
216 bao = neigh_node->orig_node->bat_priv->bat_algo_ops;
218 hlist_for_each_entry_safe(neigh_ifinfo, node_tmp,
219 &neigh_node->ifinfo_list, list) {
220 batadv_neigh_ifinfo_free_ref_now(neigh_ifinfo);
223 if (bao->bat_neigh_free)
224 bao->bat_neigh_free(neigh_node);
226 batadv_hardif_free_ref_now(neigh_node->if_incoming);
232 * batadv_neigh_node_free_ref_now - decrement the neighbors refcounter
233 * and possibly free it (without rcu callback)
234 * @neigh_node: neigh neighbor to free
237 batadv_neigh_node_free_ref_now(struct batadv_neigh_node *neigh_node)
239 if (atomic_dec_and_test(&neigh_node->refcount))
240 batadv_neigh_node_free_rcu(&neigh_node->rcu);
244 * batadv_neigh_node_free_ref - decrement the neighbors refcounter
245 * and possibly free it
246 * @neigh_node: neigh neighbor to free
248 void batadv_neigh_node_free_ref(struct batadv_neigh_node *neigh_node)
250 if (atomic_dec_and_test(&neigh_node->refcount))
251 call_rcu(&neigh_node->rcu, batadv_neigh_node_free_rcu);
255 * batadv_orig_node_get_router - router to the originator depending on iface
256 * @orig_node: the orig node for the router
257 * @if_outgoing: the interface where the payload packet has been received or
258 * the OGM should be sent to
260 * Returns the neighbor which should be router for this orig_node/iface.
262 * The object is returned with refcounter increased by 1.
264 struct batadv_neigh_node *
265 batadv_orig_router_get(struct batadv_orig_node *orig_node,
266 const struct batadv_hard_iface *if_outgoing)
268 struct batadv_orig_ifinfo *orig_ifinfo;
269 struct batadv_neigh_node *router = NULL;
272 hlist_for_each_entry_rcu(orig_ifinfo, &orig_node->ifinfo_list, list) {
273 if (orig_ifinfo->if_outgoing != if_outgoing)
276 router = rcu_dereference(orig_ifinfo->router);
280 if (router && !atomic_inc_not_zero(&router->refcount))
288 * batadv_orig_ifinfo_get - find the ifinfo from an orig_node
289 * @orig_node: the orig node to be queried
290 * @if_outgoing: the interface for which the ifinfo should be acquired
292 * Returns the requested orig_ifinfo or NULL if not found.
294 * The object is returned with refcounter increased by 1.
296 struct batadv_orig_ifinfo *
297 batadv_orig_ifinfo_get(struct batadv_orig_node *orig_node,
298 struct batadv_hard_iface *if_outgoing)
300 struct batadv_orig_ifinfo *tmp, *orig_ifinfo = NULL;
303 hlist_for_each_entry_rcu(tmp, &orig_node->ifinfo_list,
305 if (tmp->if_outgoing != if_outgoing)
308 if (!atomic_inc_not_zero(&tmp->refcount))
320 * batadv_orig_ifinfo_new - search and possibly create an orig_ifinfo object
321 * @orig_node: the orig node to be queried
322 * @if_outgoing: the interface for which the ifinfo should be acquired
324 * Returns NULL in case of failure or the orig_ifinfo object for the if_outgoing
325 * interface otherwise. The object is created and added to the list
326 * if it does not exist.
328 * The object is returned with refcounter increased by 1.
330 struct batadv_orig_ifinfo *
331 batadv_orig_ifinfo_new(struct batadv_orig_node *orig_node,
332 struct batadv_hard_iface *if_outgoing)
334 struct batadv_orig_ifinfo *orig_ifinfo = NULL;
335 unsigned long reset_time;
337 spin_lock_bh(&orig_node->neigh_list_lock);
339 orig_ifinfo = batadv_orig_ifinfo_get(orig_node, if_outgoing);
343 orig_ifinfo = kzalloc(sizeof(*orig_ifinfo), GFP_ATOMIC);
347 if (if_outgoing != BATADV_IF_DEFAULT &&
348 !atomic_inc_not_zero(&if_outgoing->refcount)) {
354 reset_time = jiffies - 1;
355 reset_time -= msecs_to_jiffies(BATADV_RESET_PROTECTION_MS);
356 orig_ifinfo->batman_seqno_reset = reset_time;
357 orig_ifinfo->if_outgoing = if_outgoing;
358 INIT_HLIST_NODE(&orig_ifinfo->list);
359 atomic_set(&orig_ifinfo->refcount, 2);
360 hlist_add_head_rcu(&orig_ifinfo->list,
361 &orig_node->ifinfo_list);
363 spin_unlock_bh(&orig_node->neigh_list_lock);
368 * batadv_neigh_ifinfo_get - find the ifinfo from an neigh_node
369 * @neigh_node: the neigh node to be queried
370 * @if_outgoing: the interface for which the ifinfo should be acquired
372 * The object is returned with refcounter increased by 1.
374 * Returns the requested neigh_ifinfo or NULL if not found
376 struct batadv_neigh_ifinfo *
377 batadv_neigh_ifinfo_get(struct batadv_neigh_node *neigh,
378 struct batadv_hard_iface *if_outgoing)
380 struct batadv_neigh_ifinfo *neigh_ifinfo = NULL,
384 hlist_for_each_entry_rcu(tmp_neigh_ifinfo, &neigh->ifinfo_list,
386 if (tmp_neigh_ifinfo->if_outgoing != if_outgoing)
389 if (!atomic_inc_not_zero(&tmp_neigh_ifinfo->refcount))
392 neigh_ifinfo = tmp_neigh_ifinfo;
401 * batadv_neigh_ifinfo_new - search and possibly create an neigh_ifinfo object
402 * @neigh_node: the neigh node to be queried
403 * @if_outgoing: the interface for which the ifinfo should be acquired
405 * Returns NULL in case of failure or the neigh_ifinfo object for the
406 * if_outgoing interface otherwise. The object is created and added to the list
407 * if it does not exist.
409 * The object is returned with refcounter increased by 1.
411 struct batadv_neigh_ifinfo *
412 batadv_neigh_ifinfo_new(struct batadv_neigh_node *neigh,
413 struct batadv_hard_iface *if_outgoing)
415 struct batadv_neigh_ifinfo *neigh_ifinfo;
417 spin_lock_bh(&neigh->ifinfo_lock);
419 neigh_ifinfo = batadv_neigh_ifinfo_get(neigh, if_outgoing);
423 neigh_ifinfo = kzalloc(sizeof(*neigh_ifinfo), GFP_ATOMIC);
427 if (if_outgoing && !atomic_inc_not_zero(&if_outgoing->refcount)) {
433 INIT_HLIST_NODE(&neigh_ifinfo->list);
434 atomic_set(&neigh_ifinfo->refcount, 2);
435 neigh_ifinfo->if_outgoing = if_outgoing;
437 hlist_add_head_rcu(&neigh_ifinfo->list, &neigh->ifinfo_list);
440 spin_unlock_bh(&neigh->ifinfo_lock);
446 * batadv_neigh_node_new - create and init a new neigh_node object
447 * @hard_iface: the interface where the neighbour is connected to
448 * @neigh_addr: the mac address of the neighbour interface
449 * @orig_node: originator object representing the neighbour
451 * Allocates a new neigh_node object and initialises all the generic fields.
452 * Returns the new object or NULL on failure.
454 struct batadv_neigh_node *
455 batadv_neigh_node_new(struct batadv_hard_iface *hard_iface,
456 const u8 *neigh_addr, struct batadv_orig_node *orig_node)
458 struct batadv_neigh_node *neigh_node;
460 neigh_node = batadv_neigh_node_get(orig_node, hard_iface, neigh_addr);
464 neigh_node = kzalloc(sizeof(*neigh_node), GFP_ATOMIC);
468 if (!atomic_inc_not_zero(&hard_iface->refcount)) {
474 INIT_HLIST_NODE(&neigh_node->list);
475 INIT_HLIST_HEAD(&neigh_node->ifinfo_list);
476 spin_lock_init(&neigh_node->ifinfo_lock);
478 ether_addr_copy(neigh_node->addr, neigh_addr);
479 neigh_node->if_incoming = hard_iface;
480 neigh_node->orig_node = orig_node;
482 /* extra reference for return */
483 atomic_set(&neigh_node->refcount, 2);
485 spin_lock_bh(&orig_node->neigh_list_lock);
486 hlist_add_head_rcu(&neigh_node->list, &orig_node->neigh_list);
487 spin_unlock_bh(&orig_node->neigh_list_lock);
489 batadv_dbg(BATADV_DBG_BATMAN, orig_node->bat_priv,
490 "Creating new neighbor %pM for orig_node %pM on interface %s\n",
491 neigh_addr, orig_node->orig, hard_iface->net_dev->name);
498 * batadv_neigh_node_get - retrieve a neighbour from the list
499 * @orig_node: originator which the neighbour belongs to
500 * @hard_iface: the interface where this neighbour is connected to
501 * @addr: the address of the neighbour
503 * Looks for and possibly returns a neighbour belonging to this originator list
504 * which is connected through the provided hard interface.
505 * Returns NULL if the neighbour is not found.
507 struct batadv_neigh_node *
508 batadv_neigh_node_get(const struct batadv_orig_node *orig_node,
509 const struct batadv_hard_iface *hard_iface,
512 struct batadv_neigh_node *tmp_neigh_node, *res = NULL;
515 hlist_for_each_entry_rcu(tmp_neigh_node, &orig_node->neigh_list, list) {
516 if (!batadv_compare_eth(tmp_neigh_node->addr, addr))
519 if (tmp_neigh_node->if_incoming != hard_iface)
522 if (!atomic_inc_not_zero(&tmp_neigh_node->refcount))
525 res = tmp_neigh_node;
534 * batadv_orig_ifinfo_free_rcu - free the orig_ifinfo object
535 * @rcu: rcu pointer of the orig_ifinfo object
537 static void batadv_orig_ifinfo_free_rcu(struct rcu_head *rcu)
539 struct batadv_orig_ifinfo *orig_ifinfo;
540 struct batadv_neigh_node *router;
542 orig_ifinfo = container_of(rcu, struct batadv_orig_ifinfo, rcu);
544 if (orig_ifinfo->if_outgoing != BATADV_IF_DEFAULT)
545 batadv_hardif_free_ref_now(orig_ifinfo->if_outgoing);
547 /* this is the last reference to this object */
548 router = rcu_dereference_protected(orig_ifinfo->router, true);
550 batadv_neigh_node_free_ref_now(router);
555 * batadv_orig_ifinfo_free_ref - decrement the refcounter and possibly free
556 * the orig_ifinfo (without rcu callback)
557 * @orig_ifinfo: the orig_ifinfo object to release
560 batadv_orig_ifinfo_free_ref_now(struct batadv_orig_ifinfo *orig_ifinfo)
562 if (atomic_dec_and_test(&orig_ifinfo->refcount))
563 batadv_orig_ifinfo_free_rcu(&orig_ifinfo->rcu);
567 * batadv_orig_ifinfo_free_ref - decrement the refcounter and possibly free
569 * @orig_ifinfo: the orig_ifinfo object to release
571 void batadv_orig_ifinfo_free_ref(struct batadv_orig_ifinfo *orig_ifinfo)
573 if (atomic_dec_and_test(&orig_ifinfo->refcount))
574 call_rcu(&orig_ifinfo->rcu, batadv_orig_ifinfo_free_rcu);
577 static void batadv_orig_node_free_rcu(struct rcu_head *rcu)
579 struct hlist_node *node_tmp;
580 struct batadv_neigh_node *neigh_node;
581 struct batadv_orig_node *orig_node;
582 struct batadv_orig_ifinfo *orig_ifinfo;
584 orig_node = container_of(rcu, struct batadv_orig_node, rcu);
586 spin_lock_bh(&orig_node->neigh_list_lock);
588 /* for all neighbors towards this originator ... */
589 hlist_for_each_entry_safe(neigh_node, node_tmp,
590 &orig_node->neigh_list, list) {
591 hlist_del_rcu(&neigh_node->list);
592 batadv_neigh_node_free_ref_now(neigh_node);
595 hlist_for_each_entry_safe(orig_ifinfo, node_tmp,
596 &orig_node->ifinfo_list, list) {
597 hlist_del_rcu(&orig_ifinfo->list);
598 batadv_orig_ifinfo_free_ref_now(orig_ifinfo);
600 spin_unlock_bh(&orig_node->neigh_list_lock);
602 batadv_mcast_purge_orig(orig_node);
605 batadv_nc_purge_orig(orig_node->bat_priv, orig_node, NULL);
607 batadv_frag_purge_orig(orig_node, NULL);
609 if (orig_node->bat_priv->bat_algo_ops->bat_orig_free)
610 orig_node->bat_priv->bat_algo_ops->bat_orig_free(orig_node);
612 kfree(orig_node->tt_buff);
617 * batadv_orig_node_free_ref - decrement the orig node refcounter and possibly
618 * schedule an rcu callback for freeing it
619 * @orig_node: the orig node to free
621 void batadv_orig_node_free_ref(struct batadv_orig_node *orig_node)
623 if (atomic_dec_and_test(&orig_node->refcount))
624 call_rcu(&orig_node->rcu, batadv_orig_node_free_rcu);
628 * batadv_orig_node_free_ref_now - decrement the orig node refcounter and
629 * possibly free it (without rcu callback)
630 * @orig_node: the orig node to free
632 void batadv_orig_node_free_ref_now(struct batadv_orig_node *orig_node)
634 if (atomic_dec_and_test(&orig_node->refcount))
635 batadv_orig_node_free_rcu(&orig_node->rcu);
638 void batadv_originator_free(struct batadv_priv *bat_priv)
640 struct batadv_hashtable *hash = bat_priv->orig_hash;
641 struct hlist_node *node_tmp;
642 struct hlist_head *head;
643 spinlock_t *list_lock; /* spinlock to protect write access */
644 struct batadv_orig_node *orig_node;
650 cancel_delayed_work_sync(&bat_priv->orig_work);
652 bat_priv->orig_hash = NULL;
654 for (i = 0; i < hash->size; i++) {
655 head = &hash->table[i];
656 list_lock = &hash->list_locks[i];
658 spin_lock_bh(list_lock);
659 hlist_for_each_entry_safe(orig_node, node_tmp,
661 hlist_del_rcu(&orig_node->hash_entry);
662 batadv_orig_node_free_ref(orig_node);
664 spin_unlock_bh(list_lock);
667 batadv_hash_destroy(hash);
671 * batadv_orig_node_new - creates a new orig_node
672 * @bat_priv: the bat priv with all the soft interface information
673 * @addr: the mac address of the originator
675 * Creates a new originator object and initialise all the generic fields.
676 * The new object is not added to the originator list.
677 * Returns the newly created object or NULL on failure.
679 struct batadv_orig_node *batadv_orig_node_new(struct batadv_priv *bat_priv,
682 struct batadv_orig_node *orig_node;
683 struct batadv_orig_node_vlan *vlan;
684 unsigned long reset_time;
687 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
688 "Creating new originator: %pM\n", addr);
690 orig_node = kzalloc(sizeof(*orig_node), GFP_ATOMIC);
694 INIT_HLIST_HEAD(&orig_node->neigh_list);
695 INIT_HLIST_HEAD(&orig_node->vlan_list);
696 INIT_HLIST_HEAD(&orig_node->ifinfo_list);
697 spin_lock_init(&orig_node->bcast_seqno_lock);
698 spin_lock_init(&orig_node->neigh_list_lock);
699 spin_lock_init(&orig_node->tt_buff_lock);
700 spin_lock_init(&orig_node->tt_lock);
701 spin_lock_init(&orig_node->vlan_list_lock);
703 batadv_nc_init_orig(orig_node);
705 /* extra reference for return */
706 atomic_set(&orig_node->refcount, 2);
708 orig_node->bat_priv = bat_priv;
709 ether_addr_copy(orig_node->orig, addr);
710 batadv_dat_init_orig_node_addr(orig_node);
711 atomic_set(&orig_node->last_ttvn, 0);
712 orig_node->tt_buff = NULL;
713 orig_node->tt_buff_len = 0;
714 orig_node->last_seen = jiffies;
715 reset_time = jiffies - 1 - msecs_to_jiffies(BATADV_RESET_PROTECTION_MS);
716 orig_node->bcast_seqno_reset = reset_time;
718 #ifdef CONFIG_BATMAN_ADV_MCAST
719 orig_node->mcast_flags = BATADV_NO_FLAGS;
720 INIT_HLIST_NODE(&orig_node->mcast_want_all_unsnoopables_node);
721 INIT_HLIST_NODE(&orig_node->mcast_want_all_ipv4_node);
722 INIT_HLIST_NODE(&orig_node->mcast_want_all_ipv6_node);
723 spin_lock_init(&orig_node->mcast_handler_lock);
726 /* create a vlan object for the "untagged" LAN */
727 vlan = batadv_orig_node_vlan_new(orig_node, BATADV_NO_FLAGS);
730 /* batadv_orig_node_vlan_new() increases the refcounter.
731 * Immediately release vlan since it is not needed anymore in this
734 batadv_orig_node_vlan_free_ref(vlan);
736 for (i = 0; i < BATADV_FRAG_BUFFER_COUNT; i++) {
737 INIT_HLIST_HEAD(&orig_node->fragments[i].head);
738 spin_lock_init(&orig_node->fragments[i].lock);
739 orig_node->fragments[i].size = 0;
749 * batadv_purge_neigh_ifinfo - purge obsolete ifinfo entries from neighbor
750 * @bat_priv: the bat priv with all the soft interface information
751 * @neigh: orig node which is to be checked
754 batadv_purge_neigh_ifinfo(struct batadv_priv *bat_priv,
755 struct batadv_neigh_node *neigh)
757 struct batadv_neigh_ifinfo *neigh_ifinfo;
758 struct batadv_hard_iface *if_outgoing;
759 struct hlist_node *node_tmp;
761 spin_lock_bh(&neigh->ifinfo_lock);
763 /* for all ifinfo objects for this neighinator */
764 hlist_for_each_entry_safe(neigh_ifinfo, node_tmp,
765 &neigh->ifinfo_list, list) {
766 if_outgoing = neigh_ifinfo->if_outgoing;
768 /* always keep the default interface */
769 if (if_outgoing == BATADV_IF_DEFAULT)
772 /* don't purge if the interface is not (going) down */
773 if ((if_outgoing->if_status != BATADV_IF_INACTIVE) &&
774 (if_outgoing->if_status != BATADV_IF_NOT_IN_USE) &&
775 (if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED))
778 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
779 "neighbor/ifinfo purge: neighbor %pM, iface: %s\n",
780 neigh->addr, if_outgoing->net_dev->name);
782 hlist_del_rcu(&neigh_ifinfo->list);
783 batadv_neigh_ifinfo_free_ref(neigh_ifinfo);
786 spin_unlock_bh(&neigh->ifinfo_lock);
790 * batadv_purge_orig_ifinfo - purge obsolete ifinfo entries from originator
791 * @bat_priv: the bat priv with all the soft interface information
792 * @orig_node: orig node which is to be checked
794 * Returns true if any ifinfo entry was purged, false otherwise.
797 batadv_purge_orig_ifinfo(struct batadv_priv *bat_priv,
798 struct batadv_orig_node *orig_node)
800 struct batadv_orig_ifinfo *orig_ifinfo;
801 struct batadv_hard_iface *if_outgoing;
802 struct hlist_node *node_tmp;
803 bool ifinfo_purged = false;
805 spin_lock_bh(&orig_node->neigh_list_lock);
807 /* for all ifinfo objects for this originator */
808 hlist_for_each_entry_safe(orig_ifinfo, node_tmp,
809 &orig_node->ifinfo_list, list) {
810 if_outgoing = orig_ifinfo->if_outgoing;
812 /* always keep the default interface */
813 if (if_outgoing == BATADV_IF_DEFAULT)
816 /* don't purge if the interface is not (going) down */
817 if ((if_outgoing->if_status != BATADV_IF_INACTIVE) &&
818 (if_outgoing->if_status != BATADV_IF_NOT_IN_USE) &&
819 (if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED))
822 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
823 "router/ifinfo purge: originator %pM, iface: %s\n",
824 orig_node->orig, if_outgoing->net_dev->name);
826 ifinfo_purged = true;
828 hlist_del_rcu(&orig_ifinfo->list);
829 batadv_orig_ifinfo_free_ref(orig_ifinfo);
830 if (orig_node->last_bonding_candidate == orig_ifinfo) {
831 orig_node->last_bonding_candidate = NULL;
832 batadv_orig_ifinfo_free_ref(orig_ifinfo);
836 spin_unlock_bh(&orig_node->neigh_list_lock);
838 return ifinfo_purged;
842 * batadv_purge_orig_neighbors - purges neighbors from originator
843 * @bat_priv: the bat priv with all the soft interface information
844 * @orig_node: orig node which is to be checked
846 * Returns true if any neighbor was purged, false otherwise
849 batadv_purge_orig_neighbors(struct batadv_priv *bat_priv,
850 struct batadv_orig_node *orig_node)
852 struct hlist_node *node_tmp;
853 struct batadv_neigh_node *neigh_node;
854 bool neigh_purged = false;
855 unsigned long last_seen;
856 struct batadv_hard_iface *if_incoming;
858 spin_lock_bh(&orig_node->neigh_list_lock);
860 /* for all neighbors towards this originator ... */
861 hlist_for_each_entry_safe(neigh_node, node_tmp,
862 &orig_node->neigh_list, list) {
863 last_seen = neigh_node->last_seen;
864 if_incoming = neigh_node->if_incoming;
866 if ((batadv_has_timed_out(last_seen, BATADV_PURGE_TIMEOUT)) ||
867 (if_incoming->if_status == BATADV_IF_INACTIVE) ||
868 (if_incoming->if_status == BATADV_IF_NOT_IN_USE) ||
869 (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)) {
870 if ((if_incoming->if_status == BATADV_IF_INACTIVE) ||
871 (if_incoming->if_status == BATADV_IF_NOT_IN_USE) ||
872 (if_incoming->if_status == BATADV_IF_TO_BE_REMOVED))
873 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
874 "neighbor purge: originator %pM, neighbor: %pM, iface: %s\n",
875 orig_node->orig, neigh_node->addr,
876 if_incoming->net_dev->name);
878 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
879 "neighbor timeout: originator %pM, neighbor: %pM, last_seen: %u\n",
880 orig_node->orig, neigh_node->addr,
881 jiffies_to_msecs(last_seen));
885 hlist_del_rcu(&neigh_node->list);
886 batadv_neigh_node_free_ref(neigh_node);
888 /* only necessary if not the whole neighbor is to be
889 * deleted, but some interface has been removed.
891 batadv_purge_neigh_ifinfo(bat_priv, neigh_node);
895 spin_unlock_bh(&orig_node->neigh_list_lock);
900 * batadv_find_best_neighbor - finds the best neighbor after purging
901 * @bat_priv: the bat priv with all the soft interface information
902 * @orig_node: orig node which is to be checked
903 * @if_outgoing: the interface for which the metric should be compared
905 * Returns the current best neighbor, with refcount increased.
907 static struct batadv_neigh_node *
908 batadv_find_best_neighbor(struct batadv_priv *bat_priv,
909 struct batadv_orig_node *orig_node,
910 struct batadv_hard_iface *if_outgoing)
912 struct batadv_neigh_node *best = NULL, *neigh;
913 struct batadv_algo_ops *bao = bat_priv->bat_algo_ops;
916 hlist_for_each_entry_rcu(neigh, &orig_node->neigh_list, list) {
917 if (best && (bao->bat_neigh_cmp(neigh, if_outgoing,
918 best, if_outgoing) <= 0))
921 if (!atomic_inc_not_zero(&neigh->refcount))
925 batadv_neigh_node_free_ref(best);
935 * batadv_purge_orig_node - purges obsolete information from an orig_node
936 * @bat_priv: the bat priv with all the soft interface information
937 * @orig_node: orig node which is to be checked
939 * This function checks if the orig_node or substructures of it have become
940 * obsolete, and purges this information if that's the case.
942 * Returns true if the orig_node is to be removed, false otherwise.
944 static bool batadv_purge_orig_node(struct batadv_priv *bat_priv,
945 struct batadv_orig_node *orig_node)
947 struct batadv_neigh_node *best_neigh_node;
948 struct batadv_hard_iface *hard_iface;
949 bool changed_ifinfo, changed_neigh;
951 if (batadv_has_timed_out(orig_node->last_seen,
952 2 * BATADV_PURGE_TIMEOUT)) {
953 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
954 "Originator timeout: originator %pM, last_seen %u\n",
956 jiffies_to_msecs(orig_node->last_seen));
959 changed_ifinfo = batadv_purge_orig_ifinfo(bat_priv, orig_node);
960 changed_neigh = batadv_purge_orig_neighbors(bat_priv, orig_node);
962 if (!changed_ifinfo && !changed_neigh)
965 /* first for NULL ... */
966 best_neigh_node = batadv_find_best_neighbor(bat_priv, orig_node,
968 batadv_update_route(bat_priv, orig_node, BATADV_IF_DEFAULT,
971 batadv_neigh_node_free_ref(best_neigh_node);
973 /* ... then for all other interfaces. */
975 list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
976 if (hard_iface->if_status != BATADV_IF_ACTIVE)
979 if (hard_iface->soft_iface != bat_priv->soft_iface)
982 best_neigh_node = batadv_find_best_neighbor(bat_priv,
985 batadv_update_route(bat_priv, orig_node, hard_iface,
988 batadv_neigh_node_free_ref(best_neigh_node);
995 static void _batadv_purge_orig(struct batadv_priv *bat_priv)
997 struct batadv_hashtable *hash = bat_priv->orig_hash;
998 struct hlist_node *node_tmp;
999 struct hlist_head *head;
1000 spinlock_t *list_lock; /* spinlock to protect write access */
1001 struct batadv_orig_node *orig_node;
1007 /* for all origins... */
1008 for (i = 0; i < hash->size; i++) {
1009 head = &hash->table[i];
1010 list_lock = &hash->list_locks[i];
1012 spin_lock_bh(list_lock);
1013 hlist_for_each_entry_safe(orig_node, node_tmp,
1015 if (batadv_purge_orig_node(bat_priv, orig_node)) {
1016 batadv_gw_node_delete(bat_priv, orig_node);
1017 hlist_del_rcu(&orig_node->hash_entry);
1018 batadv_tt_global_del_orig(orig_node->bat_priv,
1020 "originator timed out");
1021 batadv_orig_node_free_ref(orig_node);
1025 batadv_frag_purge_orig(orig_node,
1026 batadv_frag_check_entry);
1028 spin_unlock_bh(list_lock);
1031 batadv_gw_node_purge(bat_priv);
1032 batadv_gw_election(bat_priv);
1035 static void batadv_purge_orig(struct work_struct *work)
1037 struct delayed_work *delayed_work;
1038 struct batadv_priv *bat_priv;
1040 delayed_work = container_of(work, struct delayed_work, work);
1041 bat_priv = container_of(delayed_work, struct batadv_priv, orig_work);
1042 _batadv_purge_orig(bat_priv);
1043 queue_delayed_work(batadv_event_workqueue,
1044 &bat_priv->orig_work,
1045 msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD));
1048 void batadv_purge_orig_ref(struct batadv_priv *bat_priv)
1050 _batadv_purge_orig(bat_priv);
1053 int batadv_orig_seq_print_text(struct seq_file *seq, void *offset)
1055 struct net_device *net_dev = (struct net_device *)seq->private;
1056 struct batadv_priv *bat_priv = netdev_priv(net_dev);
1057 struct batadv_hard_iface *primary_if;
1059 primary_if = batadv_seq_print_text_primary_if_get(seq);
1063 seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n",
1064 BATADV_SOURCE_VERSION, primary_if->net_dev->name,
1065 primary_if->net_dev->dev_addr, net_dev->name,
1066 bat_priv->bat_algo_ops->name);
1068 batadv_hardif_free_ref(primary_if);
1070 if (!bat_priv->bat_algo_ops->bat_orig_print) {
1072 "No printing function for this routing protocol\n");
1076 bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq,
1083 * batadv_orig_hardif_seq_print_text - writes originator infos for a specific
1084 * outgoing interface
1085 * @seq: debugfs table seq_file struct
1090 int batadv_orig_hardif_seq_print_text(struct seq_file *seq, void *offset)
1092 struct net_device *net_dev = (struct net_device *)seq->private;
1093 struct batadv_hard_iface *hard_iface;
1094 struct batadv_priv *bat_priv;
1096 hard_iface = batadv_hardif_get_by_netdev(net_dev);
1098 if (!hard_iface || !hard_iface->soft_iface) {
1099 seq_puts(seq, "Interface not known to B.A.T.M.A.N.\n");
1103 bat_priv = netdev_priv(hard_iface->soft_iface);
1104 if (!bat_priv->bat_algo_ops->bat_orig_print) {
1106 "No printing function for this routing protocol\n");
1110 if (hard_iface->if_status != BATADV_IF_ACTIVE) {
1111 seq_puts(seq, "Interface not active\n");
1115 seq_printf(seq, "[B.A.T.M.A.N. adv %s, IF/MAC: %s/%pM (%s %s)]\n",
1116 BATADV_SOURCE_VERSION, hard_iface->net_dev->name,
1117 hard_iface->net_dev->dev_addr,
1118 hard_iface->soft_iface->name, bat_priv->bat_algo_ops->name);
1120 bat_priv->bat_algo_ops->bat_orig_print(bat_priv, seq, hard_iface);
1124 batadv_hardif_free_ref(hard_iface);
1128 int batadv_orig_hash_add_if(struct batadv_hard_iface *hard_iface,
1131 struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
1132 struct batadv_algo_ops *bao = bat_priv->bat_algo_ops;
1133 struct batadv_hashtable *hash = bat_priv->orig_hash;
1134 struct hlist_head *head;
1135 struct batadv_orig_node *orig_node;
1139 /* resize all orig nodes because orig_node->bcast_own(_sum) depend on
1142 for (i = 0; i < hash->size; i++) {
1143 head = &hash->table[i];
1146 hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
1148 if (bao->bat_orig_add_if)
1149 ret = bao->bat_orig_add_if(orig_node,
1164 int batadv_orig_hash_del_if(struct batadv_hard_iface *hard_iface,
1167 struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
1168 struct batadv_hashtable *hash = bat_priv->orig_hash;
1169 struct hlist_head *head;
1170 struct batadv_hard_iface *hard_iface_tmp;
1171 struct batadv_orig_node *orig_node;
1172 struct batadv_algo_ops *bao = bat_priv->bat_algo_ops;
1176 /* resize all orig nodes because orig_node->bcast_own(_sum) depend on
1179 for (i = 0; i < hash->size; i++) {
1180 head = &hash->table[i];
1183 hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
1185 if (bao->bat_orig_del_if)
1186 ret = bao->bat_orig_del_if(orig_node,
1188 hard_iface->if_num);
1195 /* renumber remaining batman interfaces _inside_ of orig_hash_lock */
1197 list_for_each_entry_rcu(hard_iface_tmp, &batadv_hardif_list, list) {
1198 if (hard_iface_tmp->if_status == BATADV_IF_NOT_IN_USE)
1201 if (hard_iface == hard_iface_tmp)
1204 if (hard_iface->soft_iface != hard_iface_tmp->soft_iface)
1207 if (hard_iface_tmp->if_num > hard_iface->if_num)
1208 hard_iface_tmp->if_num--;
1212 hard_iface->if_num = -1;