1 /* Copyright (C) 2009-2016 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/atomic.h>
22 #include <linux/errno.h>
23 #include <linux/etherdevice.h>
25 #include <linux/jiffies.h>
26 #include <linux/kernel.h>
27 #include <linux/kref.h>
28 #include <linux/list.h>
29 #include <linux/lockdep.h>
30 #include <linux/netdevice.h>
31 #include <linux/rculist.h>
32 #include <linux/seq_file.h>
33 #include <linux/slab.h>
34 #include <linux/spinlock.h>
35 #include <linux/workqueue.h>
37 #include "distributed-arp-table.h"
38 #include "fragmentation.h"
39 #include "gateway_client.h"
40 #include "hard-interface.h"
42 #include "multicast.h"
43 #include "network-coding.h"
45 #include "translation-table.h"
48 static struct lock_class_key batadv_orig_hash_lock_class_key
;
50 static void batadv_purge_orig(struct work_struct
*work
);
53 * batadv_compare_orig - comparing function used in the originator hash table
54 * @node: node in the local table
55 * @data2: second object to compare the node to
57 * Return: true if they are the same originator
59 bool batadv_compare_orig(const struct hlist_node
*node
, const void *data2
)
61 const void *data1
= container_of(node
, struct batadv_orig_node
,
64 return batadv_compare_eth(data1
, data2
);
68 * batadv_orig_node_vlan_get - get an orig_node_vlan object
69 * @orig_node: the originator serving the VLAN
70 * @vid: the VLAN identifier
72 * Return: the vlan object identified by vid and belonging to orig_node or NULL
73 * if it does not exist.
75 struct batadv_orig_node_vlan
*
76 batadv_orig_node_vlan_get(struct batadv_orig_node
*orig_node
,
79 struct batadv_orig_node_vlan
*vlan
= NULL
, *tmp
;
82 hlist_for_each_entry_rcu(tmp
, &orig_node
->vlan_list
, list
) {
86 if (!kref_get_unless_zero(&tmp
->refcount
))
99 * batadv_orig_node_vlan_new - search and possibly create an orig_node_vlan
101 * @orig_node: the originator serving the VLAN
102 * @vid: the VLAN identifier
104 * Return: NULL in case of failure or the vlan object identified by vid and
105 * belonging to orig_node otherwise. The object is created and added to the list
106 * if it does not exist.
108 * The object is returned with refcounter increased by 1.
110 struct batadv_orig_node_vlan
*
111 batadv_orig_node_vlan_new(struct batadv_orig_node
*orig_node
,
114 struct batadv_orig_node_vlan
*vlan
;
116 spin_lock_bh(&orig_node
->vlan_list_lock
);
118 /* first look if an object for this vid already exists */
119 vlan
= batadv_orig_node_vlan_get(orig_node
, vid
);
123 vlan
= kzalloc(sizeof(*vlan
), GFP_ATOMIC
);
127 kref_init(&vlan
->refcount
);
128 kref_get(&vlan
->refcount
);
131 hlist_add_head_rcu(&vlan
->list
, &orig_node
->vlan_list
);
134 spin_unlock_bh(&orig_node
->vlan_list_lock
);
140 * batadv_orig_node_vlan_release - release originator-vlan object from lists
141 * and queue for free after rcu grace period
142 * @ref: kref pointer of the originator-vlan object
144 static void batadv_orig_node_vlan_release(struct kref
*ref
)
146 struct batadv_orig_node_vlan
*orig_vlan
;
148 orig_vlan
= container_of(ref
, struct batadv_orig_node_vlan
, refcount
);
150 kfree_rcu(orig_vlan
, rcu
);
154 * batadv_orig_node_vlan_put - decrement the refcounter and possibly release
155 * the originator-vlan object
156 * @orig_vlan: the originator-vlan object to release
158 void batadv_orig_node_vlan_put(struct batadv_orig_node_vlan
*orig_vlan
)
160 kref_put(&orig_vlan
->refcount
, batadv_orig_node_vlan_release
);
163 int batadv_originator_init(struct batadv_priv
*bat_priv
)
165 if (bat_priv
->orig_hash
)
168 bat_priv
->orig_hash
= batadv_hash_new(1024);
170 if (!bat_priv
->orig_hash
)
173 batadv_hash_set_lock_class(bat_priv
->orig_hash
,
174 &batadv_orig_hash_lock_class_key
);
176 INIT_DELAYED_WORK(&bat_priv
->orig_work
, batadv_purge_orig
);
177 queue_delayed_work(batadv_event_workqueue
,
178 &bat_priv
->orig_work
,
179 msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD
));
188 * batadv_neigh_ifinfo_release - release neigh_ifinfo from lists and queue for
189 * free after rcu grace period
190 * @ref: kref pointer of the neigh_ifinfo
192 static void batadv_neigh_ifinfo_release(struct kref
*ref
)
194 struct batadv_neigh_ifinfo
*neigh_ifinfo
;
196 neigh_ifinfo
= container_of(ref
, struct batadv_neigh_ifinfo
, refcount
);
198 if (neigh_ifinfo
->if_outgoing
!= BATADV_IF_DEFAULT
)
199 batadv_hardif_put(neigh_ifinfo
->if_outgoing
);
201 kfree_rcu(neigh_ifinfo
, rcu
);
205 * batadv_neigh_ifinfo_put - decrement the refcounter and possibly release
207 * @neigh_ifinfo: the neigh_ifinfo object to release
209 void batadv_neigh_ifinfo_put(struct batadv_neigh_ifinfo
*neigh_ifinfo
)
211 kref_put(&neigh_ifinfo
->refcount
, batadv_neigh_ifinfo_release
);
215 * batadv_hardif_neigh_release - release hardif neigh node from lists and
216 * queue for free after rcu grace period
217 * @ref: kref pointer of the neigh_node
219 static void batadv_hardif_neigh_release(struct kref
*ref
)
221 struct batadv_hardif_neigh_node
*hardif_neigh
;
223 hardif_neigh
= container_of(ref
, struct batadv_hardif_neigh_node
,
226 spin_lock_bh(&hardif_neigh
->if_incoming
->neigh_list_lock
);
227 hlist_del_init_rcu(&hardif_neigh
->list
);
228 spin_unlock_bh(&hardif_neigh
->if_incoming
->neigh_list_lock
);
230 batadv_hardif_put(hardif_neigh
->if_incoming
);
231 kfree_rcu(hardif_neigh
, rcu
);
235 * batadv_hardif_neigh_put - decrement the hardif neighbors refcounter
236 * and possibly release it
237 * @hardif_neigh: hardif neigh neighbor to free
239 void batadv_hardif_neigh_put(struct batadv_hardif_neigh_node
*hardif_neigh
)
241 kref_put(&hardif_neigh
->refcount
, batadv_hardif_neigh_release
);
245 * batadv_neigh_node_release - release neigh_node from lists and queue for
246 * free after rcu grace period
247 * @ref: kref pointer of the neigh_node
249 static void batadv_neigh_node_release(struct kref
*ref
)
251 struct hlist_node
*node_tmp
;
252 struct batadv_neigh_node
*neigh_node
;
253 struct batadv_neigh_ifinfo
*neigh_ifinfo
;
254 struct batadv_algo_ops
*bao
;
256 neigh_node
= container_of(ref
, struct batadv_neigh_node
, refcount
);
257 bao
= neigh_node
->orig_node
->bat_priv
->bat_algo_ops
;
259 hlist_for_each_entry_safe(neigh_ifinfo
, node_tmp
,
260 &neigh_node
->ifinfo_list
, list
) {
261 batadv_neigh_ifinfo_put(neigh_ifinfo
);
264 batadv_hardif_neigh_put(neigh_node
->hardif_neigh
);
266 if (bao
->bat_neigh_free
)
267 bao
->bat_neigh_free(neigh_node
);
269 batadv_hardif_put(neigh_node
->if_incoming
);
271 kfree_rcu(neigh_node
, rcu
);
275 * batadv_neigh_node_put - decrement the neighbors refcounter and possibly
277 * @neigh_node: neigh neighbor to free
279 void batadv_neigh_node_put(struct batadv_neigh_node
*neigh_node
)
281 kref_put(&neigh_node
->refcount
, batadv_neigh_node_release
);
285 * batadv_orig_router_get - router to the originator depending on iface
286 * @orig_node: the orig node for the router
287 * @if_outgoing: the interface where the payload packet has been received or
288 * the OGM should be sent to
290 * Return: the neighbor which should be router for this orig_node/iface.
292 * The object is returned with refcounter increased by 1.
294 struct batadv_neigh_node
*
295 batadv_orig_router_get(struct batadv_orig_node
*orig_node
,
296 const struct batadv_hard_iface
*if_outgoing
)
298 struct batadv_orig_ifinfo
*orig_ifinfo
;
299 struct batadv_neigh_node
*router
= NULL
;
302 hlist_for_each_entry_rcu(orig_ifinfo
, &orig_node
->ifinfo_list
, list
) {
303 if (orig_ifinfo
->if_outgoing
!= if_outgoing
)
306 router
= rcu_dereference(orig_ifinfo
->router
);
310 if (router
&& !kref_get_unless_zero(&router
->refcount
))
318 * batadv_orig_ifinfo_get - find the ifinfo from an orig_node
319 * @orig_node: the orig node to be queried
320 * @if_outgoing: the interface for which the ifinfo should be acquired
322 * Return: the requested orig_ifinfo or NULL if not found.
324 * The object is returned with refcounter increased by 1.
326 struct batadv_orig_ifinfo
*
327 batadv_orig_ifinfo_get(struct batadv_orig_node
*orig_node
,
328 struct batadv_hard_iface
*if_outgoing
)
330 struct batadv_orig_ifinfo
*tmp
, *orig_ifinfo
= NULL
;
333 hlist_for_each_entry_rcu(tmp
, &orig_node
->ifinfo_list
,
335 if (tmp
->if_outgoing
!= if_outgoing
)
338 if (!kref_get_unless_zero(&tmp
->refcount
))
350 * batadv_orig_ifinfo_new - search and possibly create an orig_ifinfo object
351 * @orig_node: the orig node to be queried
352 * @if_outgoing: the interface for which the ifinfo should be acquired
354 * Return: NULL in case of failure or the orig_ifinfo object for the if_outgoing
355 * interface otherwise. The object is created and added to the list
356 * if it does not exist.
358 * The object is returned with refcounter increased by 1.
360 struct batadv_orig_ifinfo
*
361 batadv_orig_ifinfo_new(struct batadv_orig_node
*orig_node
,
362 struct batadv_hard_iface
*if_outgoing
)
364 struct batadv_orig_ifinfo
*orig_ifinfo
= NULL
;
365 unsigned long reset_time
;
367 spin_lock_bh(&orig_node
->neigh_list_lock
);
369 orig_ifinfo
= batadv_orig_ifinfo_get(orig_node
, if_outgoing
);
373 orig_ifinfo
= kzalloc(sizeof(*orig_ifinfo
), GFP_ATOMIC
);
377 if (if_outgoing
!= BATADV_IF_DEFAULT
)
378 kref_get(&if_outgoing
->refcount
);
380 reset_time
= jiffies
- 1;
381 reset_time
-= msecs_to_jiffies(BATADV_RESET_PROTECTION_MS
);
382 orig_ifinfo
->batman_seqno_reset
= reset_time
;
383 orig_ifinfo
->if_outgoing
= if_outgoing
;
384 INIT_HLIST_NODE(&orig_ifinfo
->list
);
385 kref_init(&orig_ifinfo
->refcount
);
386 kref_get(&orig_ifinfo
->refcount
);
387 hlist_add_head_rcu(&orig_ifinfo
->list
,
388 &orig_node
->ifinfo_list
);
390 spin_unlock_bh(&orig_node
->neigh_list_lock
);
395 * batadv_neigh_ifinfo_get - find the ifinfo from an neigh_node
396 * @neigh: the neigh node to be queried
397 * @if_outgoing: the interface for which the ifinfo should be acquired
399 * The object is returned with refcounter increased by 1.
401 * Return: the requested neigh_ifinfo or NULL if not found
403 struct batadv_neigh_ifinfo
*
404 batadv_neigh_ifinfo_get(struct batadv_neigh_node
*neigh
,
405 struct batadv_hard_iface
*if_outgoing
)
407 struct batadv_neigh_ifinfo
*neigh_ifinfo
= NULL
,
411 hlist_for_each_entry_rcu(tmp_neigh_ifinfo
, &neigh
->ifinfo_list
,
413 if (tmp_neigh_ifinfo
->if_outgoing
!= if_outgoing
)
416 if (!kref_get_unless_zero(&tmp_neigh_ifinfo
->refcount
))
419 neigh_ifinfo
= tmp_neigh_ifinfo
;
428 * batadv_neigh_ifinfo_new - search and possibly create an neigh_ifinfo object
429 * @neigh: the neigh node to be queried
430 * @if_outgoing: the interface for which the ifinfo should be acquired
432 * Return: NULL in case of failure or the neigh_ifinfo object for the
433 * if_outgoing interface otherwise. The object is created and added to the list
434 * if it does not exist.
436 * The object is returned with refcounter increased by 1.
438 struct batadv_neigh_ifinfo
*
439 batadv_neigh_ifinfo_new(struct batadv_neigh_node
*neigh
,
440 struct batadv_hard_iface
*if_outgoing
)
442 struct batadv_neigh_ifinfo
*neigh_ifinfo
;
444 spin_lock_bh(&neigh
->ifinfo_lock
);
446 neigh_ifinfo
= batadv_neigh_ifinfo_get(neigh
, if_outgoing
);
450 neigh_ifinfo
= kzalloc(sizeof(*neigh_ifinfo
), GFP_ATOMIC
);
455 kref_get(&if_outgoing
->refcount
);
457 INIT_HLIST_NODE(&neigh_ifinfo
->list
);
458 kref_init(&neigh_ifinfo
->refcount
);
459 kref_get(&neigh_ifinfo
->refcount
);
460 neigh_ifinfo
->if_outgoing
= if_outgoing
;
462 hlist_add_head_rcu(&neigh_ifinfo
->list
, &neigh
->ifinfo_list
);
465 spin_unlock_bh(&neigh
->ifinfo_lock
);
471 * batadv_neigh_node_get - retrieve a neighbour from the list
472 * @orig_node: originator which the neighbour belongs to
473 * @hard_iface: the interface where this neighbour is connected to
474 * @addr: the address of the neighbour
476 * Looks for and possibly returns a neighbour belonging to this originator list
477 * which is connected through the provided hard interface.
479 * Return: neighbor when found. Othwerwise NULL
481 static struct batadv_neigh_node
*
482 batadv_neigh_node_get(const struct batadv_orig_node
*orig_node
,
483 const struct batadv_hard_iface
*hard_iface
,
486 struct batadv_neigh_node
*tmp_neigh_node
, *res
= NULL
;
489 hlist_for_each_entry_rcu(tmp_neigh_node
, &orig_node
->neigh_list
, list
) {
490 if (!batadv_compare_eth(tmp_neigh_node
->addr
, addr
))
493 if (tmp_neigh_node
->if_incoming
!= hard_iface
)
496 if (!kref_get_unless_zero(&tmp_neigh_node
->refcount
))
499 res
= tmp_neigh_node
;
508 * batadv_hardif_neigh_create - create a hardif neighbour node
509 * @hard_iface: the interface this neighbour is connected to
510 * @neigh_addr: the interface address of the neighbour to retrieve
512 * Return: the hardif neighbour node if found or created or NULL otherwise.
514 static struct batadv_hardif_neigh_node
*
515 batadv_hardif_neigh_create(struct batadv_hard_iface
*hard_iface
,
516 const u8
*neigh_addr
)
518 struct batadv_priv
*bat_priv
= netdev_priv(hard_iface
->soft_iface
);
519 struct batadv_hardif_neigh_node
*hardif_neigh
= NULL
;
521 spin_lock_bh(&hard_iface
->neigh_list_lock
);
523 /* check if neighbor hasn't been added in the meantime */
524 hardif_neigh
= batadv_hardif_neigh_get(hard_iface
, neigh_addr
);
528 hardif_neigh
= kzalloc(sizeof(*hardif_neigh
), GFP_ATOMIC
);
532 kref_get(&hard_iface
->refcount
);
533 INIT_HLIST_NODE(&hardif_neigh
->list
);
534 ether_addr_copy(hardif_neigh
->addr
, neigh_addr
);
535 hardif_neigh
->if_incoming
= hard_iface
;
536 hardif_neigh
->last_seen
= jiffies
;
538 kref_init(&hardif_neigh
->refcount
);
540 if (bat_priv
->bat_algo_ops
->bat_hardif_neigh_init
)
541 bat_priv
->bat_algo_ops
->bat_hardif_neigh_init(hardif_neigh
);
543 hlist_add_head(&hardif_neigh
->list
, &hard_iface
->neigh_list
);
546 spin_unlock_bh(&hard_iface
->neigh_list_lock
);
551 * batadv_hardif_neigh_get_or_create - retrieve or create a hardif neighbour
553 * @hard_iface: the interface this neighbour is connected to
554 * @neigh_addr: the interface address of the neighbour to retrieve
556 * Return: the hardif neighbour node if found or created or NULL otherwise.
558 static struct batadv_hardif_neigh_node
*
559 batadv_hardif_neigh_get_or_create(struct batadv_hard_iface
*hard_iface
,
560 const u8
*neigh_addr
)
562 struct batadv_hardif_neigh_node
*hardif_neigh
= NULL
;
564 /* first check without locking to avoid the overhead */
565 hardif_neigh
= batadv_hardif_neigh_get(hard_iface
, neigh_addr
);
569 return batadv_hardif_neigh_create(hard_iface
, neigh_addr
);
573 * batadv_hardif_neigh_get - retrieve a hardif neighbour from the list
574 * @hard_iface: the interface where this neighbour is connected to
575 * @neigh_addr: the address of the neighbour
577 * Looks for and possibly returns a neighbour belonging to this hard interface.
579 * Return: neighbor when found. Othwerwise NULL
581 struct batadv_hardif_neigh_node
*
582 batadv_hardif_neigh_get(const struct batadv_hard_iface
*hard_iface
,
583 const u8
*neigh_addr
)
585 struct batadv_hardif_neigh_node
*tmp_hardif_neigh
, *hardif_neigh
= NULL
;
588 hlist_for_each_entry_rcu(tmp_hardif_neigh
,
589 &hard_iface
->neigh_list
, list
) {
590 if (!batadv_compare_eth(tmp_hardif_neigh
->addr
, neigh_addr
))
593 if (!kref_get_unless_zero(&tmp_hardif_neigh
->refcount
))
596 hardif_neigh
= tmp_hardif_neigh
;
605 * batadv_neigh_node_new - create and init a new neigh_node object
606 * @orig_node: originator object representing the neighbour
607 * @hard_iface: the interface where the neighbour is connected to
608 * @neigh_addr: the mac address of the neighbour interface
610 * Allocates a new neigh_node object and initialises all the generic fields.
612 * Return: neighbor when found. Othwerwise NULL
614 struct batadv_neigh_node
*
615 batadv_neigh_node_new(struct batadv_orig_node
*orig_node
,
616 struct batadv_hard_iface
*hard_iface
,
617 const u8
*neigh_addr
)
619 struct batadv_neigh_node
*neigh_node
;
620 struct batadv_hardif_neigh_node
*hardif_neigh
= NULL
;
622 spin_lock_bh(&orig_node
->neigh_list_lock
);
624 neigh_node
= batadv_neigh_node_get(orig_node
, hard_iface
, neigh_addr
);
628 hardif_neigh
= batadv_hardif_neigh_get_or_create(hard_iface
,
633 neigh_node
= kzalloc(sizeof(*neigh_node
), GFP_ATOMIC
);
637 INIT_HLIST_NODE(&neigh_node
->list
);
638 INIT_HLIST_HEAD(&neigh_node
->ifinfo_list
);
639 spin_lock_init(&neigh_node
->ifinfo_lock
);
641 kref_get(&hard_iface
->refcount
);
642 ether_addr_copy(neigh_node
->addr
, neigh_addr
);
643 neigh_node
->if_incoming
= hard_iface
;
644 neigh_node
->orig_node
= orig_node
;
645 neigh_node
->last_seen
= jiffies
;
647 /* increment unique neighbor refcount */
648 kref_get(&hardif_neigh
->refcount
);
649 neigh_node
->hardif_neigh
= hardif_neigh
;
651 /* extra reference for return */
652 kref_init(&neigh_node
->refcount
);
653 kref_get(&neigh_node
->refcount
);
655 hlist_add_head_rcu(&neigh_node
->list
, &orig_node
->neigh_list
);
657 batadv_dbg(BATADV_DBG_BATMAN
, orig_node
->bat_priv
,
658 "Creating new neighbor %pM for orig_node %pM on interface %s\n",
659 neigh_addr
, orig_node
->orig
, hard_iface
->net_dev
->name
);
662 spin_unlock_bh(&orig_node
->neigh_list_lock
);
665 batadv_hardif_neigh_put(hardif_neigh
);
670 * batadv_hardif_neigh_seq_print_text - print the single hop neighbour list
671 * @seq: neighbour table seq_file struct
676 int batadv_hardif_neigh_seq_print_text(struct seq_file
*seq
, void *offset
)
678 struct net_device
*net_dev
= (struct net_device
*)seq
->private;
679 struct batadv_priv
*bat_priv
= netdev_priv(net_dev
);
680 struct batadv_hard_iface
*primary_if
;
682 primary_if
= batadv_seq_print_text_primary_if_get(seq
);
686 seq_printf(seq
, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n",
687 BATADV_SOURCE_VERSION
, primary_if
->net_dev
->name
,
688 primary_if
->net_dev
->dev_addr
, net_dev
->name
,
689 bat_priv
->bat_algo_ops
->name
);
691 batadv_hardif_put(primary_if
);
693 if (!bat_priv
->bat_algo_ops
->bat_neigh_print
) {
695 "No printing function for this routing protocol\n");
699 bat_priv
->bat_algo_ops
->bat_neigh_print(bat_priv
, seq
);
704 * batadv_orig_ifinfo_release - release orig_ifinfo from lists and queue for
705 * free after rcu grace period
706 * @ref: kref pointer of the orig_ifinfo
708 static void batadv_orig_ifinfo_release(struct kref
*ref
)
710 struct batadv_orig_ifinfo
*orig_ifinfo
;
711 struct batadv_neigh_node
*router
;
713 orig_ifinfo
= container_of(ref
, struct batadv_orig_ifinfo
, refcount
);
715 if (orig_ifinfo
->if_outgoing
!= BATADV_IF_DEFAULT
)
716 batadv_hardif_put(orig_ifinfo
->if_outgoing
);
718 /* this is the last reference to this object */
719 router
= rcu_dereference_protected(orig_ifinfo
->router
, true);
721 batadv_neigh_node_put(router
);
723 kfree_rcu(orig_ifinfo
, rcu
);
727 * batadv_orig_ifinfo_put - decrement the refcounter and possibly release
729 * @orig_ifinfo: the orig_ifinfo object to release
731 void batadv_orig_ifinfo_put(struct batadv_orig_ifinfo
*orig_ifinfo
)
733 kref_put(&orig_ifinfo
->refcount
, batadv_orig_ifinfo_release
);
737 * batadv_orig_node_free_rcu - free the orig_node
738 * @rcu: rcu pointer of the orig_node
740 static void batadv_orig_node_free_rcu(struct rcu_head
*rcu
)
742 struct batadv_orig_node
*orig_node
;
744 orig_node
= container_of(rcu
, struct batadv_orig_node
, rcu
);
746 batadv_mcast_purge_orig(orig_node
);
748 batadv_frag_purge_orig(orig_node
, NULL
);
750 if (orig_node
->bat_priv
->bat_algo_ops
->bat_orig_free
)
751 orig_node
->bat_priv
->bat_algo_ops
->bat_orig_free(orig_node
);
753 kfree(orig_node
->tt_buff
);
758 * batadv_orig_node_release - release orig_node from lists and queue for
759 * free after rcu grace period
760 * @ref: kref pointer of the orig_node
762 static void batadv_orig_node_release(struct kref
*ref
)
764 struct hlist_node
*node_tmp
;
765 struct batadv_neigh_node
*neigh_node
;
766 struct batadv_orig_node
*orig_node
;
767 struct batadv_orig_ifinfo
*orig_ifinfo
;
768 struct batadv_orig_node_vlan
*vlan
;
769 struct batadv_orig_ifinfo
*last_candidate
;
771 orig_node
= container_of(ref
, struct batadv_orig_node
, refcount
);
773 spin_lock_bh(&orig_node
->neigh_list_lock
);
775 /* for all neighbors towards this originator ... */
776 hlist_for_each_entry_safe(neigh_node
, node_tmp
,
777 &orig_node
->neigh_list
, list
) {
778 hlist_del_rcu(&neigh_node
->list
);
779 batadv_neigh_node_put(neigh_node
);
782 hlist_for_each_entry_safe(orig_ifinfo
, node_tmp
,
783 &orig_node
->ifinfo_list
, list
) {
784 hlist_del_rcu(&orig_ifinfo
->list
);
785 batadv_orig_ifinfo_put(orig_ifinfo
);
788 last_candidate
= orig_node
->last_bonding_candidate
;
789 orig_node
->last_bonding_candidate
= NULL
;
790 spin_unlock_bh(&orig_node
->neigh_list_lock
);
793 batadv_orig_ifinfo_put(last_candidate
);
795 spin_lock_bh(&orig_node
->vlan_list_lock
);
796 hlist_for_each_entry_safe(vlan
, node_tmp
, &orig_node
->vlan_list
, list
) {
797 hlist_del_rcu(&vlan
->list
);
798 batadv_orig_node_vlan_put(vlan
);
800 spin_unlock_bh(&orig_node
->vlan_list_lock
);
803 batadv_nc_purge_orig(orig_node
->bat_priv
, orig_node
, NULL
);
805 call_rcu(&orig_node
->rcu
, batadv_orig_node_free_rcu
);
809 * batadv_orig_node_put - decrement the orig node refcounter and possibly
811 * @orig_node: the orig node to free
813 void batadv_orig_node_put(struct batadv_orig_node
*orig_node
)
815 kref_put(&orig_node
->refcount
, batadv_orig_node_release
);
818 void batadv_originator_free(struct batadv_priv
*bat_priv
)
820 struct batadv_hashtable
*hash
= bat_priv
->orig_hash
;
821 struct hlist_node
*node_tmp
;
822 struct hlist_head
*head
;
823 spinlock_t
*list_lock
; /* spinlock to protect write access */
824 struct batadv_orig_node
*orig_node
;
830 cancel_delayed_work_sync(&bat_priv
->orig_work
);
832 bat_priv
->orig_hash
= NULL
;
834 for (i
= 0; i
< hash
->size
; i
++) {
835 head
= &hash
->table
[i
];
836 list_lock
= &hash
->list_locks
[i
];
838 spin_lock_bh(list_lock
);
839 hlist_for_each_entry_safe(orig_node
, node_tmp
,
841 hlist_del_rcu(&orig_node
->hash_entry
);
842 batadv_orig_node_put(orig_node
);
844 spin_unlock_bh(list_lock
);
847 batadv_hash_destroy(hash
);
851 * batadv_orig_node_new - creates a new orig_node
852 * @bat_priv: the bat priv with all the soft interface information
853 * @addr: the mac address of the originator
855 * Creates a new originator object and initialise all the generic fields.
856 * The new object is not added to the originator list.
858 * Return: the newly created object or NULL on failure.
860 struct batadv_orig_node
*batadv_orig_node_new(struct batadv_priv
*bat_priv
,
863 struct batadv_orig_node
*orig_node
;
864 struct batadv_orig_node_vlan
*vlan
;
865 unsigned long reset_time
;
868 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
869 "Creating new originator: %pM\n", addr
);
871 orig_node
= kzalloc(sizeof(*orig_node
), GFP_ATOMIC
);
875 INIT_HLIST_HEAD(&orig_node
->neigh_list
);
876 INIT_HLIST_HEAD(&orig_node
->vlan_list
);
877 INIT_HLIST_HEAD(&orig_node
->ifinfo_list
);
878 spin_lock_init(&orig_node
->bcast_seqno_lock
);
879 spin_lock_init(&orig_node
->neigh_list_lock
);
880 spin_lock_init(&orig_node
->tt_buff_lock
);
881 spin_lock_init(&orig_node
->tt_lock
);
882 spin_lock_init(&orig_node
->vlan_list_lock
);
884 batadv_nc_init_orig(orig_node
);
886 /* extra reference for return */
887 kref_init(&orig_node
->refcount
);
888 kref_get(&orig_node
->refcount
);
890 orig_node
->bat_priv
= bat_priv
;
891 ether_addr_copy(orig_node
->orig
, addr
);
892 batadv_dat_init_orig_node_addr(orig_node
);
893 atomic_set(&orig_node
->last_ttvn
, 0);
894 orig_node
->tt_buff
= NULL
;
895 orig_node
->tt_buff_len
= 0;
896 orig_node
->last_seen
= jiffies
;
897 reset_time
= jiffies
- 1 - msecs_to_jiffies(BATADV_RESET_PROTECTION_MS
);
898 orig_node
->bcast_seqno_reset
= reset_time
;
900 #ifdef CONFIG_BATMAN_ADV_MCAST
901 orig_node
->mcast_flags
= BATADV_NO_FLAGS
;
902 INIT_HLIST_NODE(&orig_node
->mcast_want_all_unsnoopables_node
);
903 INIT_HLIST_NODE(&orig_node
->mcast_want_all_ipv4_node
);
904 INIT_HLIST_NODE(&orig_node
->mcast_want_all_ipv6_node
);
905 spin_lock_init(&orig_node
->mcast_handler_lock
);
908 /* create a vlan object for the "untagged" LAN */
909 vlan
= batadv_orig_node_vlan_new(orig_node
, BATADV_NO_FLAGS
);
912 /* batadv_orig_node_vlan_new() increases the refcounter.
913 * Immediately release vlan since it is not needed anymore in this
916 batadv_orig_node_vlan_put(vlan
);
918 for (i
= 0; i
< BATADV_FRAG_BUFFER_COUNT
; i
++) {
919 INIT_HLIST_HEAD(&orig_node
->fragments
[i
].head
);
920 spin_lock_init(&orig_node
->fragments
[i
].lock
);
921 orig_node
->fragments
[i
].size
= 0;
931 * batadv_purge_neigh_ifinfo - purge obsolete ifinfo entries from neighbor
932 * @bat_priv: the bat priv with all the soft interface information
933 * @neigh: orig node which is to be checked
936 batadv_purge_neigh_ifinfo(struct batadv_priv
*bat_priv
,
937 struct batadv_neigh_node
*neigh
)
939 struct batadv_neigh_ifinfo
*neigh_ifinfo
;
940 struct batadv_hard_iface
*if_outgoing
;
941 struct hlist_node
*node_tmp
;
943 spin_lock_bh(&neigh
->ifinfo_lock
);
945 /* for all ifinfo objects for this neighinator */
946 hlist_for_each_entry_safe(neigh_ifinfo
, node_tmp
,
947 &neigh
->ifinfo_list
, list
) {
948 if_outgoing
= neigh_ifinfo
->if_outgoing
;
950 /* always keep the default interface */
951 if (if_outgoing
== BATADV_IF_DEFAULT
)
954 /* don't purge if the interface is not (going) down */
955 if ((if_outgoing
->if_status
!= BATADV_IF_INACTIVE
) &&
956 (if_outgoing
->if_status
!= BATADV_IF_NOT_IN_USE
) &&
957 (if_outgoing
->if_status
!= BATADV_IF_TO_BE_REMOVED
))
960 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
961 "neighbor/ifinfo purge: neighbor %pM, iface: %s\n",
962 neigh
->addr
, if_outgoing
->net_dev
->name
);
964 hlist_del_rcu(&neigh_ifinfo
->list
);
965 batadv_neigh_ifinfo_put(neigh_ifinfo
);
968 spin_unlock_bh(&neigh
->ifinfo_lock
);
972 * batadv_purge_orig_ifinfo - purge obsolete ifinfo entries from originator
973 * @bat_priv: the bat priv with all the soft interface information
974 * @orig_node: orig node which is to be checked
976 * Return: true if any ifinfo entry was purged, false otherwise.
979 batadv_purge_orig_ifinfo(struct batadv_priv
*bat_priv
,
980 struct batadv_orig_node
*orig_node
)
982 struct batadv_orig_ifinfo
*orig_ifinfo
;
983 struct batadv_hard_iface
*if_outgoing
;
984 struct hlist_node
*node_tmp
;
985 bool ifinfo_purged
= false;
987 spin_lock_bh(&orig_node
->neigh_list_lock
);
989 /* for all ifinfo objects for this originator */
990 hlist_for_each_entry_safe(orig_ifinfo
, node_tmp
,
991 &orig_node
->ifinfo_list
, list
) {
992 if_outgoing
= orig_ifinfo
->if_outgoing
;
994 /* always keep the default interface */
995 if (if_outgoing
== BATADV_IF_DEFAULT
)
998 /* don't purge if the interface is not (going) down */
999 if ((if_outgoing
->if_status
!= BATADV_IF_INACTIVE
) &&
1000 (if_outgoing
->if_status
!= BATADV_IF_NOT_IN_USE
) &&
1001 (if_outgoing
->if_status
!= BATADV_IF_TO_BE_REMOVED
))
1004 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1005 "router/ifinfo purge: originator %pM, iface: %s\n",
1006 orig_node
->orig
, if_outgoing
->net_dev
->name
);
1008 ifinfo_purged
= true;
1010 hlist_del_rcu(&orig_ifinfo
->list
);
1011 batadv_orig_ifinfo_put(orig_ifinfo
);
1012 if (orig_node
->last_bonding_candidate
== orig_ifinfo
) {
1013 orig_node
->last_bonding_candidate
= NULL
;
1014 batadv_orig_ifinfo_put(orig_ifinfo
);
1018 spin_unlock_bh(&orig_node
->neigh_list_lock
);
1020 return ifinfo_purged
;
1024 * batadv_purge_orig_neighbors - purges neighbors from originator
1025 * @bat_priv: the bat priv with all the soft interface information
1026 * @orig_node: orig node which is to be checked
1028 * Return: true if any neighbor was purged, false otherwise
1031 batadv_purge_orig_neighbors(struct batadv_priv
*bat_priv
,
1032 struct batadv_orig_node
*orig_node
)
1034 struct hlist_node
*node_tmp
;
1035 struct batadv_neigh_node
*neigh_node
;
1036 bool neigh_purged
= false;
1037 unsigned long last_seen
;
1038 struct batadv_hard_iface
*if_incoming
;
1040 spin_lock_bh(&orig_node
->neigh_list_lock
);
1042 /* for all neighbors towards this originator ... */
1043 hlist_for_each_entry_safe(neigh_node
, node_tmp
,
1044 &orig_node
->neigh_list
, list
) {
1045 last_seen
= neigh_node
->last_seen
;
1046 if_incoming
= neigh_node
->if_incoming
;
1048 if ((batadv_has_timed_out(last_seen
, BATADV_PURGE_TIMEOUT
)) ||
1049 (if_incoming
->if_status
== BATADV_IF_INACTIVE
) ||
1050 (if_incoming
->if_status
== BATADV_IF_NOT_IN_USE
) ||
1051 (if_incoming
->if_status
== BATADV_IF_TO_BE_REMOVED
)) {
1052 if ((if_incoming
->if_status
== BATADV_IF_INACTIVE
) ||
1053 (if_incoming
->if_status
== BATADV_IF_NOT_IN_USE
) ||
1054 (if_incoming
->if_status
== BATADV_IF_TO_BE_REMOVED
))
1055 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1056 "neighbor purge: originator %pM, neighbor: %pM, iface: %s\n",
1057 orig_node
->orig
, neigh_node
->addr
,
1058 if_incoming
->net_dev
->name
);
1060 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1061 "neighbor timeout: originator %pM, neighbor: %pM, last_seen: %u\n",
1062 orig_node
->orig
, neigh_node
->addr
,
1063 jiffies_to_msecs(last_seen
));
1065 neigh_purged
= true;
1067 hlist_del_rcu(&neigh_node
->list
);
1068 batadv_neigh_node_put(neigh_node
);
1070 /* only necessary if not the whole neighbor is to be
1071 * deleted, but some interface has been removed.
1073 batadv_purge_neigh_ifinfo(bat_priv
, neigh_node
);
1077 spin_unlock_bh(&orig_node
->neigh_list_lock
);
1078 return neigh_purged
;
1082 * batadv_find_best_neighbor - finds the best neighbor after purging
1083 * @bat_priv: the bat priv with all the soft interface information
1084 * @orig_node: orig node which is to be checked
1085 * @if_outgoing: the interface for which the metric should be compared
1087 * Return: the current best neighbor, with refcount increased.
1089 static struct batadv_neigh_node
*
1090 batadv_find_best_neighbor(struct batadv_priv
*bat_priv
,
1091 struct batadv_orig_node
*orig_node
,
1092 struct batadv_hard_iface
*if_outgoing
)
1094 struct batadv_neigh_node
*best
= NULL
, *neigh
;
1095 struct batadv_algo_ops
*bao
= bat_priv
->bat_algo_ops
;
1098 hlist_for_each_entry_rcu(neigh
, &orig_node
->neigh_list
, list
) {
1099 if (best
&& (bao
->bat_neigh_cmp(neigh
, if_outgoing
,
1100 best
, if_outgoing
) <= 0))
1103 if (!kref_get_unless_zero(&neigh
->refcount
))
1107 batadv_neigh_node_put(best
);
1117 * batadv_purge_orig_node - purges obsolete information from an orig_node
1118 * @bat_priv: the bat priv with all the soft interface information
1119 * @orig_node: orig node which is to be checked
1121 * This function checks if the orig_node or substructures of it have become
1122 * obsolete, and purges this information if that's the case.
1124 * Return: true if the orig_node is to be removed, false otherwise.
1126 static bool batadv_purge_orig_node(struct batadv_priv
*bat_priv
,
1127 struct batadv_orig_node
*orig_node
)
1129 struct batadv_neigh_node
*best_neigh_node
;
1130 struct batadv_hard_iface
*hard_iface
;
1131 bool changed_ifinfo
, changed_neigh
;
1133 if (batadv_has_timed_out(orig_node
->last_seen
,
1134 2 * BATADV_PURGE_TIMEOUT
)) {
1135 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1136 "Originator timeout: originator %pM, last_seen %u\n",
1138 jiffies_to_msecs(orig_node
->last_seen
));
1141 changed_ifinfo
= batadv_purge_orig_ifinfo(bat_priv
, orig_node
);
1142 changed_neigh
= batadv_purge_orig_neighbors(bat_priv
, orig_node
);
1144 if (!changed_ifinfo
&& !changed_neigh
)
1147 /* first for NULL ... */
1148 best_neigh_node
= batadv_find_best_neighbor(bat_priv
, orig_node
,
1150 batadv_update_route(bat_priv
, orig_node
, BATADV_IF_DEFAULT
,
1152 if (best_neigh_node
)
1153 batadv_neigh_node_put(best_neigh_node
);
1155 /* ... then for all other interfaces. */
1157 list_for_each_entry_rcu(hard_iface
, &batadv_hardif_list
, list
) {
1158 if (hard_iface
->if_status
!= BATADV_IF_ACTIVE
)
1161 if (hard_iface
->soft_iface
!= bat_priv
->soft_iface
)
1164 if (!kref_get_unless_zero(&hard_iface
->refcount
))
1167 best_neigh_node
= batadv_find_best_neighbor(bat_priv
,
1170 batadv_update_route(bat_priv
, orig_node
, hard_iface
,
1172 if (best_neigh_node
)
1173 batadv_neigh_node_put(best_neigh_node
);
1175 batadv_hardif_put(hard_iface
);
1182 static void _batadv_purge_orig(struct batadv_priv
*bat_priv
)
1184 struct batadv_hashtable
*hash
= bat_priv
->orig_hash
;
1185 struct hlist_node
*node_tmp
;
1186 struct hlist_head
*head
;
1187 spinlock_t
*list_lock
; /* spinlock to protect write access */
1188 struct batadv_orig_node
*orig_node
;
1194 /* for all origins... */
1195 for (i
= 0; i
< hash
->size
; i
++) {
1196 head
= &hash
->table
[i
];
1197 list_lock
= &hash
->list_locks
[i
];
1199 spin_lock_bh(list_lock
);
1200 hlist_for_each_entry_safe(orig_node
, node_tmp
,
1202 if (batadv_purge_orig_node(bat_priv
, orig_node
)) {
1203 batadv_gw_node_delete(bat_priv
, orig_node
);
1204 hlist_del_rcu(&orig_node
->hash_entry
);
1205 batadv_tt_global_del_orig(orig_node
->bat_priv
,
1207 "originator timed out");
1208 batadv_orig_node_put(orig_node
);
1212 batadv_frag_purge_orig(orig_node
,
1213 batadv_frag_check_entry
);
1215 spin_unlock_bh(list_lock
);
1218 batadv_gw_election(bat_priv
);
1221 static void batadv_purge_orig(struct work_struct
*work
)
1223 struct delayed_work
*delayed_work
;
1224 struct batadv_priv
*bat_priv
;
1226 delayed_work
= to_delayed_work(work
);
1227 bat_priv
= container_of(delayed_work
, struct batadv_priv
, orig_work
);
1228 _batadv_purge_orig(bat_priv
);
1229 queue_delayed_work(batadv_event_workqueue
,
1230 &bat_priv
->orig_work
,
1231 msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD
));
1234 void batadv_purge_orig_ref(struct batadv_priv
*bat_priv
)
1236 _batadv_purge_orig(bat_priv
);
1239 int batadv_orig_seq_print_text(struct seq_file
*seq
, void *offset
)
1241 struct net_device
*net_dev
= (struct net_device
*)seq
->private;
1242 struct batadv_priv
*bat_priv
= netdev_priv(net_dev
);
1243 struct batadv_hard_iface
*primary_if
;
1245 primary_if
= batadv_seq_print_text_primary_if_get(seq
);
1249 seq_printf(seq
, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n",
1250 BATADV_SOURCE_VERSION
, primary_if
->net_dev
->name
,
1251 primary_if
->net_dev
->dev_addr
, net_dev
->name
,
1252 bat_priv
->bat_algo_ops
->name
);
1254 batadv_hardif_put(primary_if
);
1256 if (!bat_priv
->bat_algo_ops
->bat_orig_print
) {
1258 "No printing function for this routing protocol\n");
1262 bat_priv
->bat_algo_ops
->bat_orig_print(bat_priv
, seq
,
1269 * batadv_orig_hardif_seq_print_text - writes originator infos for a specific
1270 * outgoing interface
1271 * @seq: debugfs table seq_file struct
1276 int batadv_orig_hardif_seq_print_text(struct seq_file
*seq
, void *offset
)
1278 struct net_device
*net_dev
= (struct net_device
*)seq
->private;
1279 struct batadv_hard_iface
*hard_iface
;
1280 struct batadv_priv
*bat_priv
;
1282 hard_iface
= batadv_hardif_get_by_netdev(net_dev
);
1284 if (!hard_iface
|| !hard_iface
->soft_iface
) {
1285 seq_puts(seq
, "Interface not known to B.A.T.M.A.N.\n");
1289 bat_priv
= netdev_priv(hard_iface
->soft_iface
);
1290 if (!bat_priv
->bat_algo_ops
->bat_orig_print
) {
1292 "No printing function for this routing protocol\n");
1296 if (hard_iface
->if_status
!= BATADV_IF_ACTIVE
) {
1297 seq_puts(seq
, "Interface not active\n");
1301 seq_printf(seq
, "[B.A.T.M.A.N. adv %s, IF/MAC: %s/%pM (%s %s)]\n",
1302 BATADV_SOURCE_VERSION
, hard_iface
->net_dev
->name
,
1303 hard_iface
->net_dev
->dev_addr
,
1304 hard_iface
->soft_iface
->name
, bat_priv
->bat_algo_ops
->name
);
1306 bat_priv
->bat_algo_ops
->bat_orig_print(bat_priv
, seq
, hard_iface
);
1310 batadv_hardif_put(hard_iface
);
1314 int batadv_orig_hash_add_if(struct batadv_hard_iface
*hard_iface
,
1317 struct batadv_priv
*bat_priv
= netdev_priv(hard_iface
->soft_iface
);
1318 struct batadv_algo_ops
*bao
= bat_priv
->bat_algo_ops
;
1319 struct batadv_hashtable
*hash
= bat_priv
->orig_hash
;
1320 struct hlist_head
*head
;
1321 struct batadv_orig_node
*orig_node
;
1325 /* resize all orig nodes because orig_node->bcast_own(_sum) depend on
1328 for (i
= 0; i
< hash
->size
; i
++) {
1329 head
= &hash
->table
[i
];
1332 hlist_for_each_entry_rcu(orig_node
, head
, hash_entry
) {
1334 if (bao
->bat_orig_add_if
)
1335 ret
= bao
->bat_orig_add_if(orig_node
,
1350 int batadv_orig_hash_del_if(struct batadv_hard_iface
*hard_iface
,
1353 struct batadv_priv
*bat_priv
= netdev_priv(hard_iface
->soft_iface
);
1354 struct batadv_hashtable
*hash
= bat_priv
->orig_hash
;
1355 struct hlist_head
*head
;
1356 struct batadv_hard_iface
*hard_iface_tmp
;
1357 struct batadv_orig_node
*orig_node
;
1358 struct batadv_algo_ops
*bao
= bat_priv
->bat_algo_ops
;
1362 /* resize all orig nodes because orig_node->bcast_own(_sum) depend on
1365 for (i
= 0; i
< hash
->size
; i
++) {
1366 head
= &hash
->table
[i
];
1369 hlist_for_each_entry_rcu(orig_node
, head
, hash_entry
) {
1371 if (bao
->bat_orig_del_if
)
1372 ret
= bao
->bat_orig_del_if(orig_node
,
1374 hard_iface
->if_num
);
1381 /* renumber remaining batman interfaces _inside_ of orig_hash_lock */
1383 list_for_each_entry_rcu(hard_iface_tmp
, &batadv_hardif_list
, list
) {
1384 if (hard_iface_tmp
->if_status
== BATADV_IF_NOT_IN_USE
)
1387 if (hard_iface
== hard_iface_tmp
)
1390 if (hard_iface
->soft_iface
!= hard_iface_tmp
->soft_iface
)
1393 if (hard_iface_tmp
->if_num
> hard_iface
->if_num
)
1394 hard_iface_tmp
->if_num
--;
1398 hard_iface
->if_num
= -1;