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_hardif_neigh_free_rcu - free the hardif neigh_node
206 * @rcu: rcu pointer of the neigh_node
208 static void batadv_hardif_neigh_free_rcu(struct rcu_head
*rcu
)
210 struct batadv_hardif_neigh_node
*hardif_neigh
;
212 hardif_neigh
= container_of(rcu
, struct batadv_hardif_neigh_node
, rcu
);
214 batadv_hardif_free_ref_now(hardif_neigh
->if_incoming
);
219 * batadv_hardif_neigh_free_now - decrement the hardif neighbors refcounter
220 * and possibly free it (without rcu callback)
221 * @hardif_neigh: hardif neigh neighbor to free
224 batadv_hardif_neigh_free_now(struct batadv_hardif_neigh_node
*hardif_neigh
)
226 if (atomic_dec_and_test(&hardif_neigh
->refcount
)) {
227 spin_lock_bh(&hardif_neigh
->if_incoming
->neigh_list_lock
);
228 hlist_del_init_rcu(&hardif_neigh
->list
);
229 spin_unlock_bh(&hardif_neigh
->if_incoming
->neigh_list_lock
);
231 batadv_hardif_neigh_free_rcu(&hardif_neigh
->rcu
);
236 * batadv_hardif_neigh_free_ref - decrement the hardif neighbors refcounter
237 * and possibly free it
238 * @hardif_neigh: hardif neigh neighbor to free
240 void batadv_hardif_neigh_free_ref(struct batadv_hardif_neigh_node
*hardif_neigh
)
242 if (atomic_dec_and_test(&hardif_neigh
->refcount
)) {
243 spin_lock_bh(&hardif_neigh
->if_incoming
->neigh_list_lock
);
244 hlist_del_init_rcu(&hardif_neigh
->list
);
245 spin_unlock_bh(&hardif_neigh
->if_incoming
->neigh_list_lock
);
247 call_rcu(&hardif_neigh
->rcu
, batadv_hardif_neigh_free_rcu
);
252 * batadv_neigh_node_free_rcu - free the neigh_node
253 * @rcu: rcu pointer of the neigh_node
255 static void batadv_neigh_node_free_rcu(struct rcu_head
*rcu
)
257 struct hlist_node
*node_tmp
;
258 struct batadv_neigh_node
*neigh_node
;
259 struct batadv_hardif_neigh_node
*hardif_neigh
;
260 struct batadv_neigh_ifinfo
*neigh_ifinfo
;
261 struct batadv_algo_ops
*bao
;
263 neigh_node
= container_of(rcu
, struct batadv_neigh_node
, rcu
);
264 bao
= neigh_node
->orig_node
->bat_priv
->bat_algo_ops
;
266 hlist_for_each_entry_safe(neigh_ifinfo
, node_tmp
,
267 &neigh_node
->ifinfo_list
, list
) {
268 batadv_neigh_ifinfo_free_ref_now(neigh_ifinfo
);
271 hardif_neigh
= batadv_hardif_neigh_get(neigh_node
->if_incoming
,
274 /* batadv_hardif_neigh_get() increases refcount too */
275 batadv_hardif_neigh_free_now(hardif_neigh
);
276 batadv_hardif_neigh_free_now(hardif_neigh
);
279 if (bao
->bat_neigh_free
)
280 bao
->bat_neigh_free(neigh_node
);
282 batadv_hardif_free_ref_now(neigh_node
->if_incoming
);
288 * batadv_neigh_node_free_ref_now - decrement the neighbors refcounter
289 * and possibly free it (without rcu callback)
290 * @neigh_node: neigh neighbor to free
293 batadv_neigh_node_free_ref_now(struct batadv_neigh_node
*neigh_node
)
295 if (atomic_dec_and_test(&neigh_node
->refcount
))
296 batadv_neigh_node_free_rcu(&neigh_node
->rcu
);
300 * batadv_neigh_node_free_ref - decrement the neighbors refcounter
301 * and possibly free it
302 * @neigh_node: neigh neighbor to free
304 void batadv_neigh_node_free_ref(struct batadv_neigh_node
*neigh_node
)
306 if (atomic_dec_and_test(&neigh_node
->refcount
))
307 call_rcu(&neigh_node
->rcu
, batadv_neigh_node_free_rcu
);
311 * batadv_orig_node_get_router - router to the originator depending on iface
312 * @orig_node: the orig node for the router
313 * @if_outgoing: the interface where the payload packet has been received or
314 * the OGM should be sent to
316 * Returns the neighbor which should be router for this orig_node/iface.
318 * The object is returned with refcounter increased by 1.
320 struct batadv_neigh_node
*
321 batadv_orig_router_get(struct batadv_orig_node
*orig_node
,
322 const struct batadv_hard_iface
*if_outgoing
)
324 struct batadv_orig_ifinfo
*orig_ifinfo
;
325 struct batadv_neigh_node
*router
= NULL
;
328 hlist_for_each_entry_rcu(orig_ifinfo
, &orig_node
->ifinfo_list
, list
) {
329 if (orig_ifinfo
->if_outgoing
!= if_outgoing
)
332 router
= rcu_dereference(orig_ifinfo
->router
);
336 if (router
&& !atomic_inc_not_zero(&router
->refcount
))
344 * batadv_orig_ifinfo_get - find the ifinfo from an orig_node
345 * @orig_node: the orig node to be queried
346 * @if_outgoing: the interface for which the ifinfo should be acquired
348 * Returns the requested orig_ifinfo or NULL if not found.
350 * The object is returned with refcounter increased by 1.
352 struct batadv_orig_ifinfo
*
353 batadv_orig_ifinfo_get(struct batadv_orig_node
*orig_node
,
354 struct batadv_hard_iface
*if_outgoing
)
356 struct batadv_orig_ifinfo
*tmp
, *orig_ifinfo
= NULL
;
359 hlist_for_each_entry_rcu(tmp
, &orig_node
->ifinfo_list
,
361 if (tmp
->if_outgoing
!= if_outgoing
)
364 if (!atomic_inc_not_zero(&tmp
->refcount
))
376 * batadv_orig_ifinfo_new - search and possibly create an orig_ifinfo object
377 * @orig_node: the orig node to be queried
378 * @if_outgoing: the interface for which the ifinfo should be acquired
380 * Returns NULL in case of failure or the orig_ifinfo object for the if_outgoing
381 * interface otherwise. The object is created and added to the list
382 * if it does not exist.
384 * The object is returned with refcounter increased by 1.
386 struct batadv_orig_ifinfo
*
387 batadv_orig_ifinfo_new(struct batadv_orig_node
*orig_node
,
388 struct batadv_hard_iface
*if_outgoing
)
390 struct batadv_orig_ifinfo
*orig_ifinfo
= NULL
;
391 unsigned long reset_time
;
393 spin_lock_bh(&orig_node
->neigh_list_lock
);
395 orig_ifinfo
= batadv_orig_ifinfo_get(orig_node
, if_outgoing
);
399 orig_ifinfo
= kzalloc(sizeof(*orig_ifinfo
), GFP_ATOMIC
);
403 if (if_outgoing
!= BATADV_IF_DEFAULT
&&
404 !atomic_inc_not_zero(&if_outgoing
->refcount
)) {
410 reset_time
= jiffies
- 1;
411 reset_time
-= msecs_to_jiffies(BATADV_RESET_PROTECTION_MS
);
412 orig_ifinfo
->batman_seqno_reset
= reset_time
;
413 orig_ifinfo
->if_outgoing
= if_outgoing
;
414 INIT_HLIST_NODE(&orig_ifinfo
->list
);
415 atomic_set(&orig_ifinfo
->refcount
, 2);
416 hlist_add_head_rcu(&orig_ifinfo
->list
,
417 &orig_node
->ifinfo_list
);
419 spin_unlock_bh(&orig_node
->neigh_list_lock
);
424 * batadv_neigh_ifinfo_get - find the ifinfo from an neigh_node
425 * @neigh_node: the neigh node to be queried
426 * @if_outgoing: the interface for which the ifinfo should be acquired
428 * The object is returned with refcounter increased by 1.
430 * Returns the requested neigh_ifinfo or NULL if not found
432 struct batadv_neigh_ifinfo
*
433 batadv_neigh_ifinfo_get(struct batadv_neigh_node
*neigh
,
434 struct batadv_hard_iface
*if_outgoing
)
436 struct batadv_neigh_ifinfo
*neigh_ifinfo
= NULL
,
440 hlist_for_each_entry_rcu(tmp_neigh_ifinfo
, &neigh
->ifinfo_list
,
442 if (tmp_neigh_ifinfo
->if_outgoing
!= if_outgoing
)
445 if (!atomic_inc_not_zero(&tmp_neigh_ifinfo
->refcount
))
448 neigh_ifinfo
= tmp_neigh_ifinfo
;
457 * batadv_neigh_ifinfo_new - search and possibly create an neigh_ifinfo object
458 * @neigh_node: the neigh node to be queried
459 * @if_outgoing: the interface for which the ifinfo should be acquired
461 * Returns NULL in case of failure or the neigh_ifinfo object for the
462 * if_outgoing interface otherwise. The object is created and added to the list
463 * if it does not exist.
465 * The object is returned with refcounter increased by 1.
467 struct batadv_neigh_ifinfo
*
468 batadv_neigh_ifinfo_new(struct batadv_neigh_node
*neigh
,
469 struct batadv_hard_iface
*if_outgoing
)
471 struct batadv_neigh_ifinfo
*neigh_ifinfo
;
473 spin_lock_bh(&neigh
->ifinfo_lock
);
475 neigh_ifinfo
= batadv_neigh_ifinfo_get(neigh
, if_outgoing
);
479 neigh_ifinfo
= kzalloc(sizeof(*neigh_ifinfo
), GFP_ATOMIC
);
483 if (if_outgoing
&& !atomic_inc_not_zero(&if_outgoing
->refcount
)) {
489 INIT_HLIST_NODE(&neigh_ifinfo
->list
);
490 atomic_set(&neigh_ifinfo
->refcount
, 2);
491 neigh_ifinfo
->if_outgoing
= if_outgoing
;
493 hlist_add_head_rcu(&neigh_ifinfo
->list
, &neigh
->ifinfo_list
);
496 spin_unlock_bh(&neigh
->ifinfo_lock
);
502 * batadv_neigh_node_get - retrieve a neighbour from the list
503 * @orig_node: originator which the neighbour belongs to
504 * @hard_iface: the interface where this neighbour is connected to
505 * @addr: the address of the neighbour
507 * Looks for and possibly returns a neighbour belonging to this originator list
508 * which is connected through the provided hard interface.
509 * Returns NULL if the neighbour is not found.
511 static struct batadv_neigh_node
*
512 batadv_neigh_node_get(const struct batadv_orig_node
*orig_node
,
513 const struct batadv_hard_iface
*hard_iface
,
516 struct batadv_neigh_node
*tmp_neigh_node
, *res
= NULL
;
519 hlist_for_each_entry_rcu(tmp_neigh_node
, &orig_node
->neigh_list
, list
) {
520 if (!batadv_compare_eth(tmp_neigh_node
->addr
, addr
))
523 if (tmp_neigh_node
->if_incoming
!= hard_iface
)
526 if (!atomic_inc_not_zero(&tmp_neigh_node
->refcount
))
529 res
= tmp_neigh_node
;
538 * batadv_hardif_neigh_create - create a hardif neighbour node
539 * @hard_iface: the interface this neighbour is connected to
540 * @neigh_addr: the interface address of the neighbour to retrieve
542 * Returns the hardif neighbour node if found or created or NULL otherwise.
544 static struct batadv_hardif_neigh_node
*
545 batadv_hardif_neigh_create(struct batadv_hard_iface
*hard_iface
,
546 const u8
*neigh_addr
)
548 struct batadv_priv
*bat_priv
= netdev_priv(hard_iface
->soft_iface
);
549 struct batadv_hardif_neigh_node
*hardif_neigh
= NULL
;
551 spin_lock_bh(&hard_iface
->neigh_list_lock
);
553 /* check if neighbor hasn't been added in the meantime */
554 hardif_neigh
= batadv_hardif_neigh_get(hard_iface
, neigh_addr
);
558 if (!atomic_inc_not_zero(&hard_iface
->refcount
))
561 hardif_neigh
= kzalloc(sizeof(*hardif_neigh
), GFP_ATOMIC
);
563 batadv_hardif_free_ref(hard_iface
);
567 INIT_HLIST_NODE(&hardif_neigh
->list
);
568 ether_addr_copy(hardif_neigh
->addr
, neigh_addr
);
569 hardif_neigh
->if_incoming
= hard_iface
;
570 hardif_neigh
->last_seen
= jiffies
;
572 atomic_set(&hardif_neigh
->refcount
, 1);
574 if (bat_priv
->bat_algo_ops
->bat_hardif_neigh_init
)
575 bat_priv
->bat_algo_ops
->bat_hardif_neigh_init(hardif_neigh
);
577 hlist_add_head(&hardif_neigh
->list
, &hard_iface
->neigh_list
);
580 spin_unlock_bh(&hard_iface
->neigh_list_lock
);
585 * batadv_hardif_neigh_get_or_create - retrieve or create a hardif neighbour
587 * @hard_iface: the interface this neighbour is connected to
588 * @neigh_addr: the interface address of the neighbour to retrieve
590 * Returns the hardif neighbour node if found or created or NULL otherwise.
592 static struct batadv_hardif_neigh_node
*
593 batadv_hardif_neigh_get_or_create(struct batadv_hard_iface
*hard_iface
,
594 const u8
*neigh_addr
)
596 struct batadv_hardif_neigh_node
*hardif_neigh
= NULL
;
598 /* first check without locking to avoid the overhead */
599 hardif_neigh
= batadv_hardif_neigh_get(hard_iface
, neigh_addr
);
603 return batadv_hardif_neigh_create(hard_iface
, neigh_addr
);
607 * batadv_hardif_neigh_get - retrieve a hardif neighbour from the list
608 * @hard_iface: the interface where this neighbour is connected to
609 * @neigh_addr: the address of the neighbour
611 * Looks for and possibly returns a neighbour belonging to this hard interface.
612 * Returns NULL if the neighbour is not found.
614 struct batadv_hardif_neigh_node
*
615 batadv_hardif_neigh_get(const struct batadv_hard_iface
*hard_iface
,
616 const u8
*neigh_addr
)
618 struct batadv_hardif_neigh_node
*tmp_hardif_neigh
, *hardif_neigh
= NULL
;
621 hlist_for_each_entry_rcu(tmp_hardif_neigh
,
622 &hard_iface
->neigh_list
, list
) {
623 if (!batadv_compare_eth(tmp_hardif_neigh
->addr
, neigh_addr
))
626 if (!atomic_inc_not_zero(&tmp_hardif_neigh
->refcount
))
629 hardif_neigh
= tmp_hardif_neigh
;
638 * batadv_neigh_node_new - create and init a new neigh_node object
639 * @orig_node: originator object representing the neighbour
640 * @hard_iface: the interface where the neighbour is connected to
641 * @neigh_addr: the mac address of the neighbour interface
643 * Allocates a new neigh_node object and initialises all the generic fields.
644 * Returns the new object or NULL on failure.
646 struct batadv_neigh_node
*
647 batadv_neigh_node_new(struct batadv_orig_node
*orig_node
,
648 struct batadv_hard_iface
*hard_iface
,
649 const u8
*neigh_addr
)
651 struct batadv_neigh_node
*neigh_node
;
652 struct batadv_hardif_neigh_node
*hardif_neigh
= NULL
;
654 neigh_node
= batadv_neigh_node_get(orig_node
, hard_iface
, neigh_addr
);
658 hardif_neigh
= batadv_hardif_neigh_get_or_create(hard_iface
,
663 neigh_node
= kzalloc(sizeof(*neigh_node
), GFP_ATOMIC
);
667 if (!atomic_inc_not_zero(&hard_iface
->refcount
)) {
673 INIT_HLIST_NODE(&neigh_node
->list
);
674 INIT_HLIST_HEAD(&neigh_node
->ifinfo_list
);
675 spin_lock_init(&neigh_node
->ifinfo_lock
);
677 ether_addr_copy(neigh_node
->addr
, neigh_addr
);
678 neigh_node
->if_incoming
= hard_iface
;
679 neigh_node
->orig_node
= orig_node
;
681 /* extra reference for return */
682 atomic_set(&neigh_node
->refcount
, 2);
684 spin_lock_bh(&orig_node
->neigh_list_lock
);
685 hlist_add_head_rcu(&neigh_node
->list
, &orig_node
->neigh_list
);
686 spin_unlock_bh(&orig_node
->neigh_list_lock
);
688 /* increment unique neighbor refcount */
689 atomic_inc(&hardif_neigh
->refcount
);
691 batadv_dbg(BATADV_DBG_BATMAN
, orig_node
->bat_priv
,
692 "Creating new neighbor %pM for orig_node %pM on interface %s\n",
693 neigh_addr
, orig_node
->orig
, hard_iface
->net_dev
->name
);
697 batadv_hardif_neigh_free_ref(hardif_neigh
);
702 * batadv_hardif_neigh_seq_print_text - print the single hop neighbour list
703 * @seq: neighbour table seq_file struct
708 int batadv_hardif_neigh_seq_print_text(struct seq_file
*seq
, void *offset
)
710 struct net_device
*net_dev
= (struct net_device
*)seq
->private;
711 struct batadv_priv
*bat_priv
= netdev_priv(net_dev
);
712 struct batadv_hard_iface
*primary_if
;
714 primary_if
= batadv_seq_print_text_primary_if_get(seq
);
718 seq_printf(seq
, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n",
719 BATADV_SOURCE_VERSION
, primary_if
->net_dev
->name
,
720 primary_if
->net_dev
->dev_addr
, net_dev
->name
,
721 bat_priv
->bat_algo_ops
->name
);
723 batadv_hardif_free_ref(primary_if
);
725 if (!bat_priv
->bat_algo_ops
->bat_neigh_print
) {
727 "No printing function for this routing protocol\n");
731 bat_priv
->bat_algo_ops
->bat_neigh_print(bat_priv
, seq
);
736 * batadv_orig_ifinfo_free_rcu - free the orig_ifinfo object
737 * @rcu: rcu pointer of the orig_ifinfo object
739 static void batadv_orig_ifinfo_free_rcu(struct rcu_head
*rcu
)
741 struct batadv_orig_ifinfo
*orig_ifinfo
;
742 struct batadv_neigh_node
*router
;
744 orig_ifinfo
= container_of(rcu
, struct batadv_orig_ifinfo
, rcu
);
746 if (orig_ifinfo
->if_outgoing
!= BATADV_IF_DEFAULT
)
747 batadv_hardif_free_ref_now(orig_ifinfo
->if_outgoing
);
749 /* this is the last reference to this object */
750 router
= rcu_dereference_protected(orig_ifinfo
->router
, true);
752 batadv_neigh_node_free_ref_now(router
);
757 * batadv_orig_ifinfo_free_ref - decrement the refcounter and possibly free
758 * the orig_ifinfo (without rcu callback)
759 * @orig_ifinfo: the orig_ifinfo object to release
762 batadv_orig_ifinfo_free_ref_now(struct batadv_orig_ifinfo
*orig_ifinfo
)
764 if (atomic_dec_and_test(&orig_ifinfo
->refcount
))
765 batadv_orig_ifinfo_free_rcu(&orig_ifinfo
->rcu
);
769 * batadv_orig_ifinfo_free_ref - decrement the refcounter and possibly free
771 * @orig_ifinfo: the orig_ifinfo object to release
773 void batadv_orig_ifinfo_free_ref(struct batadv_orig_ifinfo
*orig_ifinfo
)
775 if (atomic_dec_and_test(&orig_ifinfo
->refcount
))
776 call_rcu(&orig_ifinfo
->rcu
, batadv_orig_ifinfo_free_rcu
);
779 static void batadv_orig_node_free_rcu(struct rcu_head
*rcu
)
781 struct hlist_node
*node_tmp
;
782 struct batadv_neigh_node
*neigh_node
;
783 struct batadv_orig_node
*orig_node
;
784 struct batadv_orig_ifinfo
*orig_ifinfo
;
786 orig_node
= container_of(rcu
, struct batadv_orig_node
, rcu
);
788 spin_lock_bh(&orig_node
->neigh_list_lock
);
790 /* for all neighbors towards this originator ... */
791 hlist_for_each_entry_safe(neigh_node
, node_tmp
,
792 &orig_node
->neigh_list
, list
) {
793 hlist_del_rcu(&neigh_node
->list
);
794 batadv_neigh_node_free_ref_now(neigh_node
);
797 hlist_for_each_entry_safe(orig_ifinfo
, node_tmp
,
798 &orig_node
->ifinfo_list
, list
) {
799 hlist_del_rcu(&orig_ifinfo
->list
);
800 batadv_orig_ifinfo_free_ref_now(orig_ifinfo
);
802 spin_unlock_bh(&orig_node
->neigh_list_lock
);
804 batadv_mcast_purge_orig(orig_node
);
807 batadv_nc_purge_orig(orig_node
->bat_priv
, orig_node
, NULL
);
809 batadv_frag_purge_orig(orig_node
, NULL
);
811 if (orig_node
->bat_priv
->bat_algo_ops
->bat_orig_free
)
812 orig_node
->bat_priv
->bat_algo_ops
->bat_orig_free(orig_node
);
814 kfree(orig_node
->tt_buff
);
819 * batadv_orig_node_free_ref - decrement the orig node refcounter and possibly
820 * schedule an rcu callback for freeing it
821 * @orig_node: the orig node to free
823 void batadv_orig_node_free_ref(struct batadv_orig_node
*orig_node
)
825 if (atomic_dec_and_test(&orig_node
->refcount
))
826 call_rcu(&orig_node
->rcu
, batadv_orig_node_free_rcu
);
830 * batadv_orig_node_free_ref_now - decrement the orig node refcounter and
831 * possibly free it (without rcu callback)
832 * @orig_node: the orig node to free
834 void batadv_orig_node_free_ref_now(struct batadv_orig_node
*orig_node
)
836 if (atomic_dec_and_test(&orig_node
->refcount
))
837 batadv_orig_node_free_rcu(&orig_node
->rcu
);
840 void batadv_originator_free(struct batadv_priv
*bat_priv
)
842 struct batadv_hashtable
*hash
= bat_priv
->orig_hash
;
843 struct hlist_node
*node_tmp
;
844 struct hlist_head
*head
;
845 spinlock_t
*list_lock
; /* spinlock to protect write access */
846 struct batadv_orig_node
*orig_node
;
852 cancel_delayed_work_sync(&bat_priv
->orig_work
);
854 bat_priv
->orig_hash
= NULL
;
856 for (i
= 0; i
< hash
->size
; i
++) {
857 head
= &hash
->table
[i
];
858 list_lock
= &hash
->list_locks
[i
];
860 spin_lock_bh(list_lock
);
861 hlist_for_each_entry_safe(orig_node
, node_tmp
,
863 hlist_del_rcu(&orig_node
->hash_entry
);
864 batadv_orig_node_free_ref(orig_node
);
866 spin_unlock_bh(list_lock
);
869 batadv_hash_destroy(hash
);
873 * batadv_orig_node_new - creates a new orig_node
874 * @bat_priv: the bat priv with all the soft interface information
875 * @addr: the mac address of the originator
877 * Creates a new originator object and initialise all the generic fields.
878 * The new object is not added to the originator list.
879 * Returns the newly created object or NULL on failure.
881 struct batadv_orig_node
*batadv_orig_node_new(struct batadv_priv
*bat_priv
,
884 struct batadv_orig_node
*orig_node
;
885 struct batadv_orig_node_vlan
*vlan
;
886 unsigned long reset_time
;
889 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
890 "Creating new originator: %pM\n", addr
);
892 orig_node
= kzalloc(sizeof(*orig_node
), GFP_ATOMIC
);
896 INIT_HLIST_HEAD(&orig_node
->neigh_list
);
897 INIT_HLIST_HEAD(&orig_node
->vlan_list
);
898 INIT_HLIST_HEAD(&orig_node
->ifinfo_list
);
899 spin_lock_init(&orig_node
->bcast_seqno_lock
);
900 spin_lock_init(&orig_node
->neigh_list_lock
);
901 spin_lock_init(&orig_node
->tt_buff_lock
);
902 spin_lock_init(&orig_node
->tt_lock
);
903 spin_lock_init(&orig_node
->vlan_list_lock
);
905 batadv_nc_init_orig(orig_node
);
907 /* extra reference for return */
908 atomic_set(&orig_node
->refcount
, 2);
910 orig_node
->bat_priv
= bat_priv
;
911 ether_addr_copy(orig_node
->orig
, addr
);
912 batadv_dat_init_orig_node_addr(orig_node
);
913 atomic_set(&orig_node
->last_ttvn
, 0);
914 orig_node
->tt_buff
= NULL
;
915 orig_node
->tt_buff_len
= 0;
916 orig_node
->last_seen
= jiffies
;
917 reset_time
= jiffies
- 1 - msecs_to_jiffies(BATADV_RESET_PROTECTION_MS
);
918 orig_node
->bcast_seqno_reset
= reset_time
;
920 #ifdef CONFIG_BATMAN_ADV_MCAST
921 orig_node
->mcast_flags
= BATADV_NO_FLAGS
;
922 INIT_HLIST_NODE(&orig_node
->mcast_want_all_unsnoopables_node
);
923 INIT_HLIST_NODE(&orig_node
->mcast_want_all_ipv4_node
);
924 INIT_HLIST_NODE(&orig_node
->mcast_want_all_ipv6_node
);
925 spin_lock_init(&orig_node
->mcast_handler_lock
);
928 /* create a vlan object for the "untagged" LAN */
929 vlan
= batadv_orig_node_vlan_new(orig_node
, BATADV_NO_FLAGS
);
932 /* batadv_orig_node_vlan_new() increases the refcounter.
933 * Immediately release vlan since it is not needed anymore in this
936 batadv_orig_node_vlan_free_ref(vlan
);
938 for (i
= 0; i
< BATADV_FRAG_BUFFER_COUNT
; i
++) {
939 INIT_HLIST_HEAD(&orig_node
->fragments
[i
].head
);
940 spin_lock_init(&orig_node
->fragments
[i
].lock
);
941 orig_node
->fragments
[i
].size
= 0;
951 * batadv_purge_neigh_ifinfo - purge obsolete ifinfo entries from neighbor
952 * @bat_priv: the bat priv with all the soft interface information
953 * @neigh: orig node which is to be checked
956 batadv_purge_neigh_ifinfo(struct batadv_priv
*bat_priv
,
957 struct batadv_neigh_node
*neigh
)
959 struct batadv_neigh_ifinfo
*neigh_ifinfo
;
960 struct batadv_hard_iface
*if_outgoing
;
961 struct hlist_node
*node_tmp
;
963 spin_lock_bh(&neigh
->ifinfo_lock
);
965 /* for all ifinfo objects for this neighinator */
966 hlist_for_each_entry_safe(neigh_ifinfo
, node_tmp
,
967 &neigh
->ifinfo_list
, list
) {
968 if_outgoing
= neigh_ifinfo
->if_outgoing
;
970 /* always keep the default interface */
971 if (if_outgoing
== BATADV_IF_DEFAULT
)
974 /* don't purge if the interface is not (going) down */
975 if ((if_outgoing
->if_status
!= BATADV_IF_INACTIVE
) &&
976 (if_outgoing
->if_status
!= BATADV_IF_NOT_IN_USE
) &&
977 (if_outgoing
->if_status
!= BATADV_IF_TO_BE_REMOVED
))
980 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
981 "neighbor/ifinfo purge: neighbor %pM, iface: %s\n",
982 neigh
->addr
, if_outgoing
->net_dev
->name
);
984 hlist_del_rcu(&neigh_ifinfo
->list
);
985 batadv_neigh_ifinfo_free_ref(neigh_ifinfo
);
988 spin_unlock_bh(&neigh
->ifinfo_lock
);
992 * batadv_purge_orig_ifinfo - purge obsolete ifinfo entries from originator
993 * @bat_priv: the bat priv with all the soft interface information
994 * @orig_node: orig node which is to be checked
996 * Returns true if any ifinfo entry was purged, false otherwise.
999 batadv_purge_orig_ifinfo(struct batadv_priv
*bat_priv
,
1000 struct batadv_orig_node
*orig_node
)
1002 struct batadv_orig_ifinfo
*orig_ifinfo
;
1003 struct batadv_hard_iface
*if_outgoing
;
1004 struct hlist_node
*node_tmp
;
1005 bool ifinfo_purged
= false;
1007 spin_lock_bh(&orig_node
->neigh_list_lock
);
1009 /* for all ifinfo objects for this originator */
1010 hlist_for_each_entry_safe(orig_ifinfo
, node_tmp
,
1011 &orig_node
->ifinfo_list
, list
) {
1012 if_outgoing
= orig_ifinfo
->if_outgoing
;
1014 /* always keep the default interface */
1015 if (if_outgoing
== BATADV_IF_DEFAULT
)
1018 /* don't purge if the interface is not (going) down */
1019 if ((if_outgoing
->if_status
!= BATADV_IF_INACTIVE
) &&
1020 (if_outgoing
->if_status
!= BATADV_IF_NOT_IN_USE
) &&
1021 (if_outgoing
->if_status
!= BATADV_IF_TO_BE_REMOVED
))
1024 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1025 "router/ifinfo purge: originator %pM, iface: %s\n",
1026 orig_node
->orig
, if_outgoing
->net_dev
->name
);
1028 ifinfo_purged
= true;
1030 hlist_del_rcu(&orig_ifinfo
->list
);
1031 batadv_orig_ifinfo_free_ref(orig_ifinfo
);
1032 if (orig_node
->last_bonding_candidate
== orig_ifinfo
) {
1033 orig_node
->last_bonding_candidate
= NULL
;
1034 batadv_orig_ifinfo_free_ref(orig_ifinfo
);
1038 spin_unlock_bh(&orig_node
->neigh_list_lock
);
1040 return ifinfo_purged
;
1044 * batadv_purge_orig_neighbors - purges neighbors from originator
1045 * @bat_priv: the bat priv with all the soft interface information
1046 * @orig_node: orig node which is to be checked
1048 * Returns true if any neighbor was purged, false otherwise
1051 batadv_purge_orig_neighbors(struct batadv_priv
*bat_priv
,
1052 struct batadv_orig_node
*orig_node
)
1054 struct hlist_node
*node_tmp
;
1055 struct batadv_neigh_node
*neigh_node
;
1056 bool neigh_purged
= false;
1057 unsigned long last_seen
;
1058 struct batadv_hard_iface
*if_incoming
;
1060 spin_lock_bh(&orig_node
->neigh_list_lock
);
1062 /* for all neighbors towards this originator ... */
1063 hlist_for_each_entry_safe(neigh_node
, node_tmp
,
1064 &orig_node
->neigh_list
, list
) {
1065 last_seen
= neigh_node
->last_seen
;
1066 if_incoming
= neigh_node
->if_incoming
;
1068 if ((batadv_has_timed_out(last_seen
, BATADV_PURGE_TIMEOUT
)) ||
1069 (if_incoming
->if_status
== BATADV_IF_INACTIVE
) ||
1070 (if_incoming
->if_status
== BATADV_IF_NOT_IN_USE
) ||
1071 (if_incoming
->if_status
== BATADV_IF_TO_BE_REMOVED
)) {
1072 if ((if_incoming
->if_status
== BATADV_IF_INACTIVE
) ||
1073 (if_incoming
->if_status
== BATADV_IF_NOT_IN_USE
) ||
1074 (if_incoming
->if_status
== BATADV_IF_TO_BE_REMOVED
))
1075 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1076 "neighbor purge: originator %pM, neighbor: %pM, iface: %s\n",
1077 orig_node
->orig
, neigh_node
->addr
,
1078 if_incoming
->net_dev
->name
);
1080 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1081 "neighbor timeout: originator %pM, neighbor: %pM, last_seen: %u\n",
1082 orig_node
->orig
, neigh_node
->addr
,
1083 jiffies_to_msecs(last_seen
));
1085 neigh_purged
= true;
1087 hlist_del_rcu(&neigh_node
->list
);
1088 batadv_neigh_node_free_ref(neigh_node
);
1090 /* only necessary if not the whole neighbor is to be
1091 * deleted, but some interface has been removed.
1093 batadv_purge_neigh_ifinfo(bat_priv
, neigh_node
);
1097 spin_unlock_bh(&orig_node
->neigh_list_lock
);
1098 return neigh_purged
;
1102 * batadv_find_best_neighbor - finds the best neighbor after purging
1103 * @bat_priv: the bat priv with all the soft interface information
1104 * @orig_node: orig node which is to be checked
1105 * @if_outgoing: the interface for which the metric should be compared
1107 * Returns the current best neighbor, with refcount increased.
1109 static struct batadv_neigh_node
*
1110 batadv_find_best_neighbor(struct batadv_priv
*bat_priv
,
1111 struct batadv_orig_node
*orig_node
,
1112 struct batadv_hard_iface
*if_outgoing
)
1114 struct batadv_neigh_node
*best
= NULL
, *neigh
;
1115 struct batadv_algo_ops
*bao
= bat_priv
->bat_algo_ops
;
1118 hlist_for_each_entry_rcu(neigh
, &orig_node
->neigh_list
, list
) {
1119 if (best
&& (bao
->bat_neigh_cmp(neigh
, if_outgoing
,
1120 best
, if_outgoing
) <= 0))
1123 if (!atomic_inc_not_zero(&neigh
->refcount
))
1127 batadv_neigh_node_free_ref(best
);
1137 * batadv_purge_orig_node - purges obsolete information from an orig_node
1138 * @bat_priv: the bat priv with all the soft interface information
1139 * @orig_node: orig node which is to be checked
1141 * This function checks if the orig_node or substructures of it have become
1142 * obsolete, and purges this information if that's the case.
1144 * Returns true if the orig_node is to be removed, false otherwise.
1146 static bool batadv_purge_orig_node(struct batadv_priv
*bat_priv
,
1147 struct batadv_orig_node
*orig_node
)
1149 struct batadv_neigh_node
*best_neigh_node
;
1150 struct batadv_hard_iface
*hard_iface
;
1151 bool changed_ifinfo
, changed_neigh
;
1153 if (batadv_has_timed_out(orig_node
->last_seen
,
1154 2 * BATADV_PURGE_TIMEOUT
)) {
1155 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1156 "Originator timeout: originator %pM, last_seen %u\n",
1158 jiffies_to_msecs(orig_node
->last_seen
));
1161 changed_ifinfo
= batadv_purge_orig_ifinfo(bat_priv
, orig_node
);
1162 changed_neigh
= batadv_purge_orig_neighbors(bat_priv
, orig_node
);
1164 if (!changed_ifinfo
&& !changed_neigh
)
1167 /* first for NULL ... */
1168 best_neigh_node
= batadv_find_best_neighbor(bat_priv
, orig_node
,
1170 batadv_update_route(bat_priv
, orig_node
, BATADV_IF_DEFAULT
,
1172 if (best_neigh_node
)
1173 batadv_neigh_node_free_ref(best_neigh_node
);
1175 /* ... then for all other interfaces. */
1177 list_for_each_entry_rcu(hard_iface
, &batadv_hardif_list
, list
) {
1178 if (hard_iface
->if_status
!= BATADV_IF_ACTIVE
)
1181 if (hard_iface
->soft_iface
!= bat_priv
->soft_iface
)
1184 best_neigh_node
= batadv_find_best_neighbor(bat_priv
,
1187 batadv_update_route(bat_priv
, orig_node
, hard_iface
,
1189 if (best_neigh_node
)
1190 batadv_neigh_node_free_ref(best_neigh_node
);
1197 static void _batadv_purge_orig(struct batadv_priv
*bat_priv
)
1199 struct batadv_hashtable
*hash
= bat_priv
->orig_hash
;
1200 struct hlist_node
*node_tmp
;
1201 struct hlist_head
*head
;
1202 spinlock_t
*list_lock
; /* spinlock to protect write access */
1203 struct batadv_orig_node
*orig_node
;
1209 /* for all origins... */
1210 for (i
= 0; i
< hash
->size
; i
++) {
1211 head
= &hash
->table
[i
];
1212 list_lock
= &hash
->list_locks
[i
];
1214 spin_lock_bh(list_lock
);
1215 hlist_for_each_entry_safe(orig_node
, node_tmp
,
1217 if (batadv_purge_orig_node(bat_priv
, orig_node
)) {
1218 batadv_gw_node_delete(bat_priv
, orig_node
);
1219 hlist_del_rcu(&orig_node
->hash_entry
);
1220 batadv_tt_global_del_orig(orig_node
->bat_priv
,
1222 "originator timed out");
1223 batadv_orig_node_free_ref(orig_node
);
1227 batadv_frag_purge_orig(orig_node
,
1228 batadv_frag_check_entry
);
1230 spin_unlock_bh(list_lock
);
1233 batadv_gw_election(bat_priv
);
1236 static void batadv_purge_orig(struct work_struct
*work
)
1238 struct delayed_work
*delayed_work
;
1239 struct batadv_priv
*bat_priv
;
1241 delayed_work
= container_of(work
, struct delayed_work
, work
);
1242 bat_priv
= container_of(delayed_work
, struct batadv_priv
, orig_work
);
1243 _batadv_purge_orig(bat_priv
);
1244 queue_delayed_work(batadv_event_workqueue
,
1245 &bat_priv
->orig_work
,
1246 msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD
));
1249 void batadv_purge_orig_ref(struct batadv_priv
*bat_priv
)
1251 _batadv_purge_orig(bat_priv
);
1254 int batadv_orig_seq_print_text(struct seq_file
*seq
, void *offset
)
1256 struct net_device
*net_dev
= (struct net_device
*)seq
->private;
1257 struct batadv_priv
*bat_priv
= netdev_priv(net_dev
);
1258 struct batadv_hard_iface
*primary_if
;
1260 primary_if
= batadv_seq_print_text_primary_if_get(seq
);
1264 seq_printf(seq
, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n",
1265 BATADV_SOURCE_VERSION
, primary_if
->net_dev
->name
,
1266 primary_if
->net_dev
->dev_addr
, net_dev
->name
,
1267 bat_priv
->bat_algo_ops
->name
);
1269 batadv_hardif_free_ref(primary_if
);
1271 if (!bat_priv
->bat_algo_ops
->bat_orig_print
) {
1273 "No printing function for this routing protocol\n");
1277 bat_priv
->bat_algo_ops
->bat_orig_print(bat_priv
, seq
,
1284 * batadv_orig_hardif_seq_print_text - writes originator infos for a specific
1285 * outgoing interface
1286 * @seq: debugfs table seq_file struct
1291 int batadv_orig_hardif_seq_print_text(struct seq_file
*seq
, void *offset
)
1293 struct net_device
*net_dev
= (struct net_device
*)seq
->private;
1294 struct batadv_hard_iface
*hard_iface
;
1295 struct batadv_priv
*bat_priv
;
1297 hard_iface
= batadv_hardif_get_by_netdev(net_dev
);
1299 if (!hard_iface
|| !hard_iface
->soft_iface
) {
1300 seq_puts(seq
, "Interface not known to B.A.T.M.A.N.\n");
1304 bat_priv
= netdev_priv(hard_iface
->soft_iface
);
1305 if (!bat_priv
->bat_algo_ops
->bat_orig_print
) {
1307 "No printing function for this routing protocol\n");
1311 if (hard_iface
->if_status
!= BATADV_IF_ACTIVE
) {
1312 seq_puts(seq
, "Interface not active\n");
1316 seq_printf(seq
, "[B.A.T.M.A.N. adv %s, IF/MAC: %s/%pM (%s %s)]\n",
1317 BATADV_SOURCE_VERSION
, hard_iface
->net_dev
->name
,
1318 hard_iface
->net_dev
->dev_addr
,
1319 hard_iface
->soft_iface
->name
, bat_priv
->bat_algo_ops
->name
);
1321 bat_priv
->bat_algo_ops
->bat_orig_print(bat_priv
, seq
, hard_iface
);
1325 batadv_hardif_free_ref(hard_iface
);
1329 int batadv_orig_hash_add_if(struct batadv_hard_iface
*hard_iface
,
1332 struct batadv_priv
*bat_priv
= netdev_priv(hard_iface
->soft_iface
);
1333 struct batadv_algo_ops
*bao
= bat_priv
->bat_algo_ops
;
1334 struct batadv_hashtable
*hash
= bat_priv
->orig_hash
;
1335 struct hlist_head
*head
;
1336 struct batadv_orig_node
*orig_node
;
1340 /* resize all orig nodes because orig_node->bcast_own(_sum) depend on
1343 for (i
= 0; i
< hash
->size
; i
++) {
1344 head
= &hash
->table
[i
];
1347 hlist_for_each_entry_rcu(orig_node
, head
, hash_entry
) {
1349 if (bao
->bat_orig_add_if
)
1350 ret
= bao
->bat_orig_add_if(orig_node
,
1365 int batadv_orig_hash_del_if(struct batadv_hard_iface
*hard_iface
,
1368 struct batadv_priv
*bat_priv
= netdev_priv(hard_iface
->soft_iface
);
1369 struct batadv_hashtable
*hash
= bat_priv
->orig_hash
;
1370 struct hlist_head
*head
;
1371 struct batadv_hard_iface
*hard_iface_tmp
;
1372 struct batadv_orig_node
*orig_node
;
1373 struct batadv_algo_ops
*bao
= bat_priv
->bat_algo_ops
;
1377 /* resize all orig nodes because orig_node->bcast_own(_sum) depend on
1380 for (i
= 0; i
< hash
->size
; i
++) {
1381 head
= &hash
->table
[i
];
1384 hlist_for_each_entry_rcu(orig_node
, head
, hash_entry
) {
1386 if (bao
->bat_orig_del_if
)
1387 ret
= bao
->bat_orig_del_if(orig_node
,
1389 hard_iface
->if_num
);
1396 /* renumber remaining batman interfaces _inside_ of orig_hash_lock */
1398 list_for_each_entry_rcu(hard_iface_tmp
, &batadv_hardif_list
, list
) {
1399 if (hard_iface_tmp
->if_status
== BATADV_IF_NOT_IN_USE
)
1402 if (hard_iface
== hard_iface_tmp
)
1405 if (hard_iface
->soft_iface
!= hard_iface_tmp
->soft_iface
)
1408 if (hard_iface_tmp
->if_num
> hard_iface
->if_num
)
1409 hard_iface_tmp
->if_num
--;
1413 hard_iface
->if_num
= -1;