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_election(bat_priv
);
1034 static void batadv_purge_orig(struct work_struct
*work
)
1036 struct delayed_work
*delayed_work
;
1037 struct batadv_priv
*bat_priv
;
1039 delayed_work
= container_of(work
, struct delayed_work
, work
);
1040 bat_priv
= container_of(delayed_work
, struct batadv_priv
, orig_work
);
1041 _batadv_purge_orig(bat_priv
);
1042 queue_delayed_work(batadv_event_workqueue
,
1043 &bat_priv
->orig_work
,
1044 msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD
));
1047 void batadv_purge_orig_ref(struct batadv_priv
*bat_priv
)
1049 _batadv_purge_orig(bat_priv
);
1052 int batadv_orig_seq_print_text(struct seq_file
*seq
, void *offset
)
1054 struct net_device
*net_dev
= (struct net_device
*)seq
->private;
1055 struct batadv_priv
*bat_priv
= netdev_priv(net_dev
);
1056 struct batadv_hard_iface
*primary_if
;
1058 primary_if
= batadv_seq_print_text_primary_if_get(seq
);
1062 seq_printf(seq
, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n",
1063 BATADV_SOURCE_VERSION
, primary_if
->net_dev
->name
,
1064 primary_if
->net_dev
->dev_addr
, net_dev
->name
,
1065 bat_priv
->bat_algo_ops
->name
);
1067 batadv_hardif_free_ref(primary_if
);
1069 if (!bat_priv
->bat_algo_ops
->bat_orig_print
) {
1071 "No printing function for this routing protocol\n");
1075 bat_priv
->bat_algo_ops
->bat_orig_print(bat_priv
, seq
,
1082 * batadv_orig_hardif_seq_print_text - writes originator infos for a specific
1083 * outgoing interface
1084 * @seq: debugfs table seq_file struct
1089 int batadv_orig_hardif_seq_print_text(struct seq_file
*seq
, void *offset
)
1091 struct net_device
*net_dev
= (struct net_device
*)seq
->private;
1092 struct batadv_hard_iface
*hard_iface
;
1093 struct batadv_priv
*bat_priv
;
1095 hard_iface
= batadv_hardif_get_by_netdev(net_dev
);
1097 if (!hard_iface
|| !hard_iface
->soft_iface
) {
1098 seq_puts(seq
, "Interface not known to B.A.T.M.A.N.\n");
1102 bat_priv
= netdev_priv(hard_iface
->soft_iface
);
1103 if (!bat_priv
->bat_algo_ops
->bat_orig_print
) {
1105 "No printing function for this routing protocol\n");
1109 if (hard_iface
->if_status
!= BATADV_IF_ACTIVE
) {
1110 seq_puts(seq
, "Interface not active\n");
1114 seq_printf(seq
, "[B.A.T.M.A.N. adv %s, IF/MAC: %s/%pM (%s %s)]\n",
1115 BATADV_SOURCE_VERSION
, hard_iface
->net_dev
->name
,
1116 hard_iface
->net_dev
->dev_addr
,
1117 hard_iface
->soft_iface
->name
, bat_priv
->bat_algo_ops
->name
);
1119 bat_priv
->bat_algo_ops
->bat_orig_print(bat_priv
, seq
, hard_iface
);
1123 batadv_hardif_free_ref(hard_iface
);
1127 int batadv_orig_hash_add_if(struct batadv_hard_iface
*hard_iface
,
1130 struct batadv_priv
*bat_priv
= netdev_priv(hard_iface
->soft_iface
);
1131 struct batadv_algo_ops
*bao
= bat_priv
->bat_algo_ops
;
1132 struct batadv_hashtable
*hash
= bat_priv
->orig_hash
;
1133 struct hlist_head
*head
;
1134 struct batadv_orig_node
*orig_node
;
1138 /* resize all orig nodes because orig_node->bcast_own(_sum) depend on
1141 for (i
= 0; i
< hash
->size
; i
++) {
1142 head
= &hash
->table
[i
];
1145 hlist_for_each_entry_rcu(orig_node
, head
, hash_entry
) {
1147 if (bao
->bat_orig_add_if
)
1148 ret
= bao
->bat_orig_add_if(orig_node
,
1163 int batadv_orig_hash_del_if(struct batadv_hard_iface
*hard_iface
,
1166 struct batadv_priv
*bat_priv
= netdev_priv(hard_iface
->soft_iface
);
1167 struct batadv_hashtable
*hash
= bat_priv
->orig_hash
;
1168 struct hlist_head
*head
;
1169 struct batadv_hard_iface
*hard_iface_tmp
;
1170 struct batadv_orig_node
*orig_node
;
1171 struct batadv_algo_ops
*bao
= bat_priv
->bat_algo_ops
;
1175 /* resize all orig nodes because orig_node->bcast_own(_sum) depend on
1178 for (i
= 0; i
< hash
->size
; i
++) {
1179 head
= &hash
->table
[i
];
1182 hlist_for_each_entry_rcu(orig_node
, head
, hash_entry
) {
1184 if (bao
->bat_orig_del_if
)
1185 ret
= bao
->bat_orig_del_if(orig_node
,
1187 hard_iface
->if_num
);
1194 /* renumber remaining batman interfaces _inside_ of orig_hash_lock */
1196 list_for_each_entry_rcu(hard_iface_tmp
, &batadv_hardif_list
, list
) {
1197 if (hard_iface_tmp
->if_status
== BATADV_IF_NOT_IN_USE
)
1200 if (hard_iface
== hard_iface_tmp
)
1203 if (hard_iface
->soft_iface
!= hard_iface_tmp
->soft_iface
)
1206 if (hard_iface_tmp
->if_num
> hard_iface
->if_num
)
1207 hard_iface_tmp
->if_num
--;
1211 hard_iface
->if_num
= -1;