This source file includes following definitions.
- batadv_orig_hash_find
- batadv_compare_orig
- batadv_orig_node_vlan_get
- batadv_orig_node_vlan_new
- batadv_orig_node_vlan_release
- batadv_orig_node_vlan_put
- batadv_originator_init
- batadv_neigh_ifinfo_release
- batadv_neigh_ifinfo_put
- batadv_hardif_neigh_release
- batadv_hardif_neigh_put
- batadv_neigh_node_release
- batadv_neigh_node_put
- batadv_orig_router_get
- batadv_orig_ifinfo_get
- batadv_orig_ifinfo_new
- batadv_neigh_ifinfo_get
- batadv_neigh_ifinfo_new
- batadv_neigh_node_get
- batadv_hardif_neigh_create
- batadv_hardif_neigh_get_or_create
- batadv_hardif_neigh_get
- batadv_neigh_node_create
- batadv_neigh_node_get_or_create
- batadv_hardif_neigh_seq_print_text
- batadv_hardif_neigh_dump
- batadv_orig_ifinfo_release
- batadv_orig_ifinfo_put
- batadv_orig_node_free_rcu
- batadv_orig_node_release
- batadv_orig_node_put
- batadv_originator_free
- batadv_orig_node_new
- batadv_purge_neigh_ifinfo
- batadv_purge_orig_ifinfo
- batadv_purge_orig_neighbors
- batadv_find_best_neighbor
- batadv_purge_orig_node
- batadv_purge_orig_ref
- batadv_purge_orig
- batadv_orig_seq_print_text
- batadv_orig_hardif_seq_print_text
- batadv_orig_dump
1
2
3
4
5
6
7 #include "originator.h"
8 #include "main.h"
9
10 #include <linux/atomic.h>
11 #include <linux/errno.h>
12 #include <linux/etherdevice.h>
13 #include <linux/gfp.h>
14 #include <linux/jiffies.h>
15 #include <linux/kernel.h>
16 #include <linux/kref.h>
17 #include <linux/list.h>
18 #include <linux/lockdep.h>
19 #include <linux/netdevice.h>
20 #include <linux/netlink.h>
21 #include <linux/rculist.h>
22 #include <linux/rcupdate.h>
23 #include <linux/seq_file.h>
24 #include <linux/skbuff.h>
25 #include <linux/slab.h>
26 #include <linux/spinlock.h>
27 #include <linux/stddef.h>
28 #include <linux/workqueue.h>
29 #include <net/sock.h>
30 #include <uapi/linux/batadv_packet.h>
31 #include <uapi/linux/batman_adv.h>
32
33 #include "bat_algo.h"
34 #include "distributed-arp-table.h"
35 #include "fragmentation.h"
36 #include "gateway_client.h"
37 #include "hard-interface.h"
38 #include "hash.h"
39 #include "log.h"
40 #include "multicast.h"
41 #include "netlink.h"
42 #include "network-coding.h"
43 #include "routing.h"
44 #include "soft-interface.h"
45 #include "translation-table.h"
46
47
48 static struct lock_class_key batadv_orig_hash_lock_class_key;
49
50
51
52
53
54
55
56
57 struct batadv_orig_node *
58 batadv_orig_hash_find(struct batadv_priv *bat_priv, const void *data)
59 {
60 struct batadv_hashtable *hash = bat_priv->orig_hash;
61 struct hlist_head *head;
62 struct batadv_orig_node *orig_node, *orig_node_tmp = NULL;
63 int index;
64
65 if (!hash)
66 return NULL;
67
68 index = batadv_choose_orig(data, hash->size);
69 head = &hash->table[index];
70
71 rcu_read_lock();
72 hlist_for_each_entry_rcu(orig_node, head, hash_entry) {
73 if (!batadv_compare_eth(orig_node, data))
74 continue;
75
76 if (!kref_get_unless_zero(&orig_node->refcount))
77 continue;
78
79 orig_node_tmp = orig_node;
80 break;
81 }
82 rcu_read_unlock();
83
84 return orig_node_tmp;
85 }
86
87 static void batadv_purge_orig(struct work_struct *work);
88
89
90
91
92
93
94
95
96 bool batadv_compare_orig(const struct hlist_node *node, const void *data2)
97 {
98 const void *data1 = container_of(node, struct batadv_orig_node,
99 hash_entry);
100
101 return batadv_compare_eth(data1, data2);
102 }
103
104
105
106
107
108
109
110
111
112 struct batadv_orig_node_vlan *
113 batadv_orig_node_vlan_get(struct batadv_orig_node *orig_node,
114 unsigned short vid)
115 {
116 struct batadv_orig_node_vlan *vlan = NULL, *tmp;
117
118 rcu_read_lock();
119 hlist_for_each_entry_rcu(tmp, &orig_node->vlan_list, list) {
120 if (tmp->vid != vid)
121 continue;
122
123 if (!kref_get_unless_zero(&tmp->refcount))
124 continue;
125
126 vlan = tmp;
127
128 break;
129 }
130 rcu_read_unlock();
131
132 return vlan;
133 }
134
135
136
137
138
139
140
141
142
143
144
145
146
147 struct batadv_orig_node_vlan *
148 batadv_orig_node_vlan_new(struct batadv_orig_node *orig_node,
149 unsigned short vid)
150 {
151 struct batadv_orig_node_vlan *vlan;
152
153 spin_lock_bh(&orig_node->vlan_list_lock);
154
155
156 vlan = batadv_orig_node_vlan_get(orig_node, vid);
157 if (vlan)
158 goto out;
159
160 vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC);
161 if (!vlan)
162 goto out;
163
164 kref_init(&vlan->refcount);
165 vlan->vid = vid;
166
167 kref_get(&vlan->refcount);
168 hlist_add_head_rcu(&vlan->list, &orig_node->vlan_list);
169
170 out:
171 spin_unlock_bh(&orig_node->vlan_list_lock);
172
173 return vlan;
174 }
175
176
177
178
179
180
181 static void batadv_orig_node_vlan_release(struct kref *ref)
182 {
183 struct batadv_orig_node_vlan *orig_vlan;
184
185 orig_vlan = container_of(ref, struct batadv_orig_node_vlan, refcount);
186
187 kfree_rcu(orig_vlan, rcu);
188 }
189
190
191
192
193
194
195 void batadv_orig_node_vlan_put(struct batadv_orig_node_vlan *orig_vlan)
196 {
197 kref_put(&orig_vlan->refcount, batadv_orig_node_vlan_release);
198 }
199
200
201
202
203
204
205
206 int batadv_originator_init(struct batadv_priv *bat_priv)
207 {
208 if (bat_priv->orig_hash)
209 return 0;
210
211 bat_priv->orig_hash = batadv_hash_new(1024);
212
213 if (!bat_priv->orig_hash)
214 goto err;
215
216 batadv_hash_set_lock_class(bat_priv->orig_hash,
217 &batadv_orig_hash_lock_class_key);
218
219 INIT_DELAYED_WORK(&bat_priv->orig_work, batadv_purge_orig);
220 queue_delayed_work(batadv_event_workqueue,
221 &bat_priv->orig_work,
222 msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD));
223
224 return 0;
225
226 err:
227 return -ENOMEM;
228 }
229
230
231
232
233
234
235 static void batadv_neigh_ifinfo_release(struct kref *ref)
236 {
237 struct batadv_neigh_ifinfo *neigh_ifinfo;
238
239 neigh_ifinfo = container_of(ref, struct batadv_neigh_ifinfo, refcount);
240
241 if (neigh_ifinfo->if_outgoing != BATADV_IF_DEFAULT)
242 batadv_hardif_put(neigh_ifinfo->if_outgoing);
243
244 kfree_rcu(neigh_ifinfo, rcu);
245 }
246
247
248
249
250
251
252 void batadv_neigh_ifinfo_put(struct batadv_neigh_ifinfo *neigh_ifinfo)
253 {
254 kref_put(&neigh_ifinfo->refcount, batadv_neigh_ifinfo_release);
255 }
256
257
258
259
260
261
262 static void batadv_hardif_neigh_release(struct kref *ref)
263 {
264 struct batadv_hardif_neigh_node *hardif_neigh;
265
266 hardif_neigh = container_of(ref, struct batadv_hardif_neigh_node,
267 refcount);
268
269 spin_lock_bh(&hardif_neigh->if_incoming->neigh_list_lock);
270 hlist_del_init_rcu(&hardif_neigh->list);
271 spin_unlock_bh(&hardif_neigh->if_incoming->neigh_list_lock);
272
273 batadv_hardif_put(hardif_neigh->if_incoming);
274 kfree_rcu(hardif_neigh, rcu);
275 }
276
277
278
279
280
281
282 void batadv_hardif_neigh_put(struct batadv_hardif_neigh_node *hardif_neigh)
283 {
284 kref_put(&hardif_neigh->refcount, batadv_hardif_neigh_release);
285 }
286
287
288
289
290
291
292 static void batadv_neigh_node_release(struct kref *ref)
293 {
294 struct hlist_node *node_tmp;
295 struct batadv_neigh_node *neigh_node;
296 struct batadv_neigh_ifinfo *neigh_ifinfo;
297
298 neigh_node = container_of(ref, struct batadv_neigh_node, refcount);
299
300 hlist_for_each_entry_safe(neigh_ifinfo, node_tmp,
301 &neigh_node->ifinfo_list, list) {
302 batadv_neigh_ifinfo_put(neigh_ifinfo);
303 }
304
305 batadv_hardif_neigh_put(neigh_node->hardif_neigh);
306
307 batadv_hardif_put(neigh_node->if_incoming);
308
309 kfree_rcu(neigh_node, rcu);
310 }
311
312
313
314
315
316
317 void batadv_neigh_node_put(struct batadv_neigh_node *neigh_node)
318 {
319 kref_put(&neigh_node->refcount, batadv_neigh_node_release);
320 }
321
322
323
324
325
326
327
328
329
330
331
332 struct batadv_neigh_node *
333 batadv_orig_router_get(struct batadv_orig_node *orig_node,
334 const struct batadv_hard_iface *if_outgoing)
335 {
336 struct batadv_orig_ifinfo *orig_ifinfo;
337 struct batadv_neigh_node *router = NULL;
338
339 rcu_read_lock();
340 hlist_for_each_entry_rcu(orig_ifinfo, &orig_node->ifinfo_list, list) {
341 if (orig_ifinfo->if_outgoing != if_outgoing)
342 continue;
343
344 router = rcu_dereference(orig_ifinfo->router);
345 break;
346 }
347
348 if (router && !kref_get_unless_zero(&router->refcount))
349 router = NULL;
350
351 rcu_read_unlock();
352 return router;
353 }
354
355
356
357
358
359
360
361
362
363
364 struct batadv_orig_ifinfo *
365 batadv_orig_ifinfo_get(struct batadv_orig_node *orig_node,
366 struct batadv_hard_iface *if_outgoing)
367 {
368 struct batadv_orig_ifinfo *tmp, *orig_ifinfo = NULL;
369
370 rcu_read_lock();
371 hlist_for_each_entry_rcu(tmp, &orig_node->ifinfo_list,
372 list) {
373 if (tmp->if_outgoing != if_outgoing)
374 continue;
375
376 if (!kref_get_unless_zero(&tmp->refcount))
377 continue;
378
379 orig_ifinfo = tmp;
380 break;
381 }
382 rcu_read_unlock();
383
384 return orig_ifinfo;
385 }
386
387
388
389
390
391
392
393
394
395
396
397
398 struct batadv_orig_ifinfo *
399 batadv_orig_ifinfo_new(struct batadv_orig_node *orig_node,
400 struct batadv_hard_iface *if_outgoing)
401 {
402 struct batadv_orig_ifinfo *orig_ifinfo;
403 unsigned long reset_time;
404
405 spin_lock_bh(&orig_node->neigh_list_lock);
406
407 orig_ifinfo = batadv_orig_ifinfo_get(orig_node, if_outgoing);
408 if (orig_ifinfo)
409 goto out;
410
411 orig_ifinfo = kzalloc(sizeof(*orig_ifinfo), GFP_ATOMIC);
412 if (!orig_ifinfo)
413 goto out;
414
415 if (if_outgoing != BATADV_IF_DEFAULT)
416 kref_get(&if_outgoing->refcount);
417
418 reset_time = jiffies - 1;
419 reset_time -= msecs_to_jiffies(BATADV_RESET_PROTECTION_MS);
420 orig_ifinfo->batman_seqno_reset = reset_time;
421 orig_ifinfo->if_outgoing = if_outgoing;
422 INIT_HLIST_NODE(&orig_ifinfo->list);
423 kref_init(&orig_ifinfo->refcount);
424
425 kref_get(&orig_ifinfo->refcount);
426 hlist_add_head_rcu(&orig_ifinfo->list,
427 &orig_node->ifinfo_list);
428 out:
429 spin_unlock_bh(&orig_node->neigh_list_lock);
430 return orig_ifinfo;
431 }
432
433
434
435
436
437
438
439
440
441
442 struct batadv_neigh_ifinfo *
443 batadv_neigh_ifinfo_get(struct batadv_neigh_node *neigh,
444 struct batadv_hard_iface *if_outgoing)
445 {
446 struct batadv_neigh_ifinfo *neigh_ifinfo = NULL,
447 *tmp_neigh_ifinfo;
448
449 rcu_read_lock();
450 hlist_for_each_entry_rcu(tmp_neigh_ifinfo, &neigh->ifinfo_list,
451 list) {
452 if (tmp_neigh_ifinfo->if_outgoing != if_outgoing)
453 continue;
454
455 if (!kref_get_unless_zero(&tmp_neigh_ifinfo->refcount))
456 continue;
457
458 neigh_ifinfo = tmp_neigh_ifinfo;
459 break;
460 }
461 rcu_read_unlock();
462
463 return neigh_ifinfo;
464 }
465
466
467
468
469
470
471
472
473
474
475
476
477 struct batadv_neigh_ifinfo *
478 batadv_neigh_ifinfo_new(struct batadv_neigh_node *neigh,
479 struct batadv_hard_iface *if_outgoing)
480 {
481 struct batadv_neigh_ifinfo *neigh_ifinfo;
482
483 spin_lock_bh(&neigh->ifinfo_lock);
484
485 neigh_ifinfo = batadv_neigh_ifinfo_get(neigh, if_outgoing);
486 if (neigh_ifinfo)
487 goto out;
488
489 neigh_ifinfo = kzalloc(sizeof(*neigh_ifinfo), GFP_ATOMIC);
490 if (!neigh_ifinfo)
491 goto out;
492
493 if (if_outgoing)
494 kref_get(&if_outgoing->refcount);
495
496 INIT_HLIST_NODE(&neigh_ifinfo->list);
497 kref_init(&neigh_ifinfo->refcount);
498 neigh_ifinfo->if_outgoing = if_outgoing;
499
500 kref_get(&neigh_ifinfo->refcount);
501 hlist_add_head_rcu(&neigh_ifinfo->list, &neigh->ifinfo_list);
502
503 out:
504 spin_unlock_bh(&neigh->ifinfo_lock);
505
506 return neigh_ifinfo;
507 }
508
509
510
511
512
513
514
515
516
517
518
519
520 static struct batadv_neigh_node *
521 batadv_neigh_node_get(const struct batadv_orig_node *orig_node,
522 const struct batadv_hard_iface *hard_iface,
523 const u8 *addr)
524 {
525 struct batadv_neigh_node *tmp_neigh_node, *res = NULL;
526
527 rcu_read_lock();
528 hlist_for_each_entry_rcu(tmp_neigh_node, &orig_node->neigh_list, list) {
529 if (!batadv_compare_eth(tmp_neigh_node->addr, addr))
530 continue;
531
532 if (tmp_neigh_node->if_incoming != hard_iface)
533 continue;
534
535 if (!kref_get_unless_zero(&tmp_neigh_node->refcount))
536 continue;
537
538 res = tmp_neigh_node;
539 break;
540 }
541 rcu_read_unlock();
542
543 return res;
544 }
545
546
547
548
549
550
551
552
553
554 static struct batadv_hardif_neigh_node *
555 batadv_hardif_neigh_create(struct batadv_hard_iface *hard_iface,
556 const u8 *neigh_addr,
557 struct batadv_orig_node *orig_node)
558 {
559 struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
560 struct batadv_hardif_neigh_node *hardif_neigh;
561
562 spin_lock_bh(&hard_iface->neigh_list_lock);
563
564
565 hardif_neigh = batadv_hardif_neigh_get(hard_iface, neigh_addr);
566 if (hardif_neigh)
567 goto out;
568
569 hardif_neigh = kzalloc(sizeof(*hardif_neigh), GFP_ATOMIC);
570 if (!hardif_neigh)
571 goto out;
572
573 kref_get(&hard_iface->refcount);
574 INIT_HLIST_NODE(&hardif_neigh->list);
575 ether_addr_copy(hardif_neigh->addr, neigh_addr);
576 ether_addr_copy(hardif_neigh->orig, orig_node->orig);
577 hardif_neigh->if_incoming = hard_iface;
578 hardif_neigh->last_seen = jiffies;
579
580 kref_init(&hardif_neigh->refcount);
581
582 if (bat_priv->algo_ops->neigh.hardif_init)
583 bat_priv->algo_ops->neigh.hardif_init(hardif_neigh);
584
585 hlist_add_head_rcu(&hardif_neigh->list, &hard_iface->neigh_list);
586
587 out:
588 spin_unlock_bh(&hard_iface->neigh_list_lock);
589 return hardif_neigh;
590 }
591
592
593
594
595
596
597
598
599
600
601 static struct batadv_hardif_neigh_node *
602 batadv_hardif_neigh_get_or_create(struct batadv_hard_iface *hard_iface,
603 const u8 *neigh_addr,
604 struct batadv_orig_node *orig_node)
605 {
606 struct batadv_hardif_neigh_node *hardif_neigh;
607
608
609 hardif_neigh = batadv_hardif_neigh_get(hard_iface, neigh_addr);
610 if (hardif_neigh)
611 return hardif_neigh;
612
613 return batadv_hardif_neigh_create(hard_iface, neigh_addr, orig_node);
614 }
615
616
617
618
619
620
621
622
623
624
625 struct batadv_hardif_neigh_node *
626 batadv_hardif_neigh_get(const struct batadv_hard_iface *hard_iface,
627 const u8 *neigh_addr)
628 {
629 struct batadv_hardif_neigh_node *tmp_hardif_neigh, *hardif_neigh = NULL;
630
631 rcu_read_lock();
632 hlist_for_each_entry_rcu(tmp_hardif_neigh,
633 &hard_iface->neigh_list, list) {
634 if (!batadv_compare_eth(tmp_hardif_neigh->addr, neigh_addr))
635 continue;
636
637 if (!kref_get_unless_zero(&tmp_hardif_neigh->refcount))
638 continue;
639
640 hardif_neigh = tmp_hardif_neigh;
641 break;
642 }
643 rcu_read_unlock();
644
645 return hardif_neigh;
646 }
647
648
649
650
651
652
653
654
655
656
657
658 static struct batadv_neigh_node *
659 batadv_neigh_node_create(struct batadv_orig_node *orig_node,
660 struct batadv_hard_iface *hard_iface,
661 const u8 *neigh_addr)
662 {
663 struct batadv_neigh_node *neigh_node;
664 struct batadv_hardif_neigh_node *hardif_neigh = NULL;
665
666 spin_lock_bh(&orig_node->neigh_list_lock);
667
668 neigh_node = batadv_neigh_node_get(orig_node, hard_iface, neigh_addr);
669 if (neigh_node)
670 goto out;
671
672 hardif_neigh = batadv_hardif_neigh_get_or_create(hard_iface,
673 neigh_addr, orig_node);
674 if (!hardif_neigh)
675 goto out;
676
677 neigh_node = kzalloc(sizeof(*neigh_node), GFP_ATOMIC);
678 if (!neigh_node)
679 goto out;
680
681 INIT_HLIST_NODE(&neigh_node->list);
682 INIT_HLIST_HEAD(&neigh_node->ifinfo_list);
683 spin_lock_init(&neigh_node->ifinfo_lock);
684
685 kref_get(&hard_iface->refcount);
686 ether_addr_copy(neigh_node->addr, neigh_addr);
687 neigh_node->if_incoming = hard_iface;
688 neigh_node->orig_node = orig_node;
689 neigh_node->last_seen = jiffies;
690
691
692 kref_get(&hardif_neigh->refcount);
693 neigh_node->hardif_neigh = hardif_neigh;
694
695
696 kref_init(&neigh_node->refcount);
697
698 kref_get(&neigh_node->refcount);
699 hlist_add_head_rcu(&neigh_node->list, &orig_node->neigh_list);
700
701 batadv_dbg(BATADV_DBG_BATMAN, orig_node->bat_priv,
702 "Creating new neighbor %pM for orig_node %pM on interface %s\n",
703 neigh_addr, orig_node->orig, hard_iface->net_dev->name);
704
705 out:
706 spin_unlock_bh(&orig_node->neigh_list_lock);
707
708 if (hardif_neigh)
709 batadv_hardif_neigh_put(hardif_neigh);
710 return neigh_node;
711 }
712
713
714
715
716
717
718
719
720
721 struct batadv_neigh_node *
722 batadv_neigh_node_get_or_create(struct batadv_orig_node *orig_node,
723 struct batadv_hard_iface *hard_iface,
724 const u8 *neigh_addr)
725 {
726 struct batadv_neigh_node *neigh_node;
727
728
729 neigh_node = batadv_neigh_node_get(orig_node, hard_iface, neigh_addr);
730 if (neigh_node)
731 return neigh_node;
732
733 return batadv_neigh_node_create(orig_node, hard_iface, neigh_addr);
734 }
735
736 #ifdef CONFIG_BATMAN_ADV_DEBUGFS
737
738
739
740
741
742
743
744 int batadv_hardif_neigh_seq_print_text(struct seq_file *seq, void *offset)
745 {
746 struct net_device *net_dev = (struct net_device *)seq->private;
747 struct batadv_priv *bat_priv = netdev_priv(net_dev);
748 struct batadv_hard_iface *primary_if;
749
750 primary_if = batadv_seq_print_text_primary_if_get(seq);
751 if (!primary_if)
752 return 0;
753
754 seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n",
755 BATADV_SOURCE_VERSION, primary_if->net_dev->name,
756 primary_if->net_dev->dev_addr, net_dev->name,
757 bat_priv->algo_ops->name);
758
759 batadv_hardif_put(primary_if);
760
761 if (!bat_priv->algo_ops->neigh.print) {
762 seq_puts(seq,
763 "No printing function for this routing protocol\n");
764 return 0;
765 }
766
767 bat_priv->algo_ops->neigh.print(bat_priv, seq);
768 return 0;
769 }
770 #endif
771
772
773
774
775
776
777
778
779
780 int batadv_hardif_neigh_dump(struct sk_buff *msg, struct netlink_callback *cb)
781 {
782 struct net *net = sock_net(cb->skb->sk);
783 struct net_device *soft_iface;
784 struct net_device *hard_iface = NULL;
785 struct batadv_hard_iface *hardif = BATADV_IF_DEFAULT;
786 struct batadv_priv *bat_priv;
787 struct batadv_hard_iface *primary_if = NULL;
788 int ret;
789 int ifindex, hard_ifindex;
790
791 ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX);
792 if (!ifindex)
793 return -EINVAL;
794
795 soft_iface = dev_get_by_index(net, ifindex);
796 if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
797 ret = -ENODEV;
798 goto out;
799 }
800
801 bat_priv = netdev_priv(soft_iface);
802
803 primary_if = batadv_primary_if_get_selected(bat_priv);
804 if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) {
805 ret = -ENOENT;
806 goto out;
807 }
808
809 hard_ifindex = batadv_netlink_get_ifindex(cb->nlh,
810 BATADV_ATTR_HARD_IFINDEX);
811 if (hard_ifindex) {
812 hard_iface = dev_get_by_index(net, hard_ifindex);
813 if (hard_iface)
814 hardif = batadv_hardif_get_by_netdev(hard_iface);
815
816 if (!hardif) {
817 ret = -ENODEV;
818 goto out;
819 }
820
821 if (hardif->soft_iface != soft_iface) {
822 ret = -ENOENT;
823 goto out;
824 }
825 }
826
827 if (!bat_priv->algo_ops->neigh.dump) {
828 ret = -EOPNOTSUPP;
829 goto out;
830 }
831
832 bat_priv->algo_ops->neigh.dump(msg, cb, bat_priv, hardif);
833
834 ret = msg->len;
835
836 out:
837 if (hardif)
838 batadv_hardif_put(hardif);
839 if (hard_iface)
840 dev_put(hard_iface);
841 if (primary_if)
842 batadv_hardif_put(primary_if);
843 if (soft_iface)
844 dev_put(soft_iface);
845
846 return ret;
847 }
848
849
850
851
852
853
854 static void batadv_orig_ifinfo_release(struct kref *ref)
855 {
856 struct batadv_orig_ifinfo *orig_ifinfo;
857 struct batadv_neigh_node *router;
858
859 orig_ifinfo = container_of(ref, struct batadv_orig_ifinfo, refcount);
860
861 if (orig_ifinfo->if_outgoing != BATADV_IF_DEFAULT)
862 batadv_hardif_put(orig_ifinfo->if_outgoing);
863
864
865 router = rcu_dereference_protected(orig_ifinfo->router, true);
866 if (router)
867 batadv_neigh_node_put(router);
868
869 kfree_rcu(orig_ifinfo, rcu);
870 }
871
872
873
874
875
876
877 void batadv_orig_ifinfo_put(struct batadv_orig_ifinfo *orig_ifinfo)
878 {
879 kref_put(&orig_ifinfo->refcount, batadv_orig_ifinfo_release);
880 }
881
882
883
884
885
886 static void batadv_orig_node_free_rcu(struct rcu_head *rcu)
887 {
888 struct batadv_orig_node *orig_node;
889
890 orig_node = container_of(rcu, struct batadv_orig_node, rcu);
891
892 batadv_mcast_purge_orig(orig_node);
893
894 batadv_frag_purge_orig(orig_node, NULL);
895
896 kfree(orig_node->tt_buff);
897 kfree(orig_node);
898 }
899
900
901
902
903
904
905 static void batadv_orig_node_release(struct kref *ref)
906 {
907 struct hlist_node *node_tmp;
908 struct batadv_neigh_node *neigh_node;
909 struct batadv_orig_node *orig_node;
910 struct batadv_orig_ifinfo *orig_ifinfo;
911 struct batadv_orig_node_vlan *vlan;
912 struct batadv_orig_ifinfo *last_candidate;
913
914 orig_node = container_of(ref, struct batadv_orig_node, refcount);
915
916 spin_lock_bh(&orig_node->neigh_list_lock);
917
918
919 hlist_for_each_entry_safe(neigh_node, node_tmp,
920 &orig_node->neigh_list, list) {
921 hlist_del_rcu(&neigh_node->list);
922 batadv_neigh_node_put(neigh_node);
923 }
924
925 hlist_for_each_entry_safe(orig_ifinfo, node_tmp,
926 &orig_node->ifinfo_list, list) {
927 hlist_del_rcu(&orig_ifinfo->list);
928 batadv_orig_ifinfo_put(orig_ifinfo);
929 }
930
931 last_candidate = orig_node->last_bonding_candidate;
932 orig_node->last_bonding_candidate = NULL;
933 spin_unlock_bh(&orig_node->neigh_list_lock);
934
935 if (last_candidate)
936 batadv_orig_ifinfo_put(last_candidate);
937
938 spin_lock_bh(&orig_node->vlan_list_lock);
939 hlist_for_each_entry_safe(vlan, node_tmp, &orig_node->vlan_list, list) {
940 hlist_del_rcu(&vlan->list);
941 batadv_orig_node_vlan_put(vlan);
942 }
943 spin_unlock_bh(&orig_node->vlan_list_lock);
944
945
946 batadv_nc_purge_orig(orig_node->bat_priv, orig_node, NULL);
947
948 call_rcu(&orig_node->rcu, batadv_orig_node_free_rcu);
949 }
950
951
952
953
954
955
956 void batadv_orig_node_put(struct batadv_orig_node *orig_node)
957 {
958 kref_put(&orig_node->refcount, batadv_orig_node_release);
959 }
960
961
962
963
964
965 void batadv_originator_free(struct batadv_priv *bat_priv)
966 {
967 struct batadv_hashtable *hash = bat_priv->orig_hash;
968 struct hlist_node *node_tmp;
969 struct hlist_head *head;
970 spinlock_t *list_lock;
971 struct batadv_orig_node *orig_node;
972 u32 i;
973
974 if (!hash)
975 return;
976
977 cancel_delayed_work_sync(&bat_priv->orig_work);
978
979 bat_priv->orig_hash = NULL;
980
981 for (i = 0; i < hash->size; i++) {
982 head = &hash->table[i];
983 list_lock = &hash->list_locks[i];
984
985 spin_lock_bh(list_lock);
986 hlist_for_each_entry_safe(orig_node, node_tmp,
987 head, hash_entry) {
988 hlist_del_rcu(&orig_node->hash_entry);
989 batadv_orig_node_put(orig_node);
990 }
991 spin_unlock_bh(list_lock);
992 }
993
994 batadv_hash_destroy(hash);
995 }
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007 struct batadv_orig_node *batadv_orig_node_new(struct batadv_priv *bat_priv,
1008 const u8 *addr)
1009 {
1010 struct batadv_orig_node *orig_node;
1011 struct batadv_orig_node_vlan *vlan;
1012 unsigned long reset_time;
1013 int i;
1014
1015 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
1016 "Creating new originator: %pM\n", addr);
1017
1018 orig_node = kzalloc(sizeof(*orig_node), GFP_ATOMIC);
1019 if (!orig_node)
1020 return NULL;
1021
1022 INIT_HLIST_HEAD(&orig_node->neigh_list);
1023 INIT_HLIST_HEAD(&orig_node->vlan_list);
1024 INIT_HLIST_HEAD(&orig_node->ifinfo_list);
1025 spin_lock_init(&orig_node->bcast_seqno_lock);
1026 spin_lock_init(&orig_node->neigh_list_lock);
1027 spin_lock_init(&orig_node->tt_buff_lock);
1028 spin_lock_init(&orig_node->tt_lock);
1029 spin_lock_init(&orig_node->vlan_list_lock);
1030
1031 batadv_nc_init_orig(orig_node);
1032
1033
1034 kref_init(&orig_node->refcount);
1035
1036 orig_node->bat_priv = bat_priv;
1037 ether_addr_copy(orig_node->orig, addr);
1038 batadv_dat_init_orig_node_addr(orig_node);
1039 atomic_set(&orig_node->last_ttvn, 0);
1040 orig_node->tt_buff = NULL;
1041 orig_node->tt_buff_len = 0;
1042 orig_node->last_seen = jiffies;
1043 reset_time = jiffies - 1 - msecs_to_jiffies(BATADV_RESET_PROTECTION_MS);
1044 orig_node->bcast_seqno_reset = reset_time;
1045
1046 #ifdef CONFIG_BATMAN_ADV_MCAST
1047 orig_node->mcast_flags = BATADV_MCAST_WANT_NO_RTR4;
1048 orig_node->mcast_flags |= BATADV_MCAST_WANT_NO_RTR6;
1049 INIT_HLIST_NODE(&orig_node->mcast_want_all_unsnoopables_node);
1050 INIT_HLIST_NODE(&orig_node->mcast_want_all_ipv4_node);
1051 INIT_HLIST_NODE(&orig_node->mcast_want_all_ipv6_node);
1052 spin_lock_init(&orig_node->mcast_handler_lock);
1053 #endif
1054
1055
1056 vlan = batadv_orig_node_vlan_new(orig_node, BATADV_NO_FLAGS);
1057 if (!vlan)
1058 goto free_orig_node;
1059
1060
1061
1062
1063 batadv_orig_node_vlan_put(vlan);
1064
1065 for (i = 0; i < BATADV_FRAG_BUFFER_COUNT; i++) {
1066 INIT_HLIST_HEAD(&orig_node->fragments[i].fragment_list);
1067 spin_lock_init(&orig_node->fragments[i].lock);
1068 orig_node->fragments[i].size = 0;
1069 }
1070
1071 return orig_node;
1072 free_orig_node:
1073 kfree(orig_node);
1074 return NULL;
1075 }
1076
1077
1078
1079
1080
1081
1082 static void
1083 batadv_purge_neigh_ifinfo(struct batadv_priv *bat_priv,
1084 struct batadv_neigh_node *neigh)
1085 {
1086 struct batadv_neigh_ifinfo *neigh_ifinfo;
1087 struct batadv_hard_iface *if_outgoing;
1088 struct hlist_node *node_tmp;
1089
1090 spin_lock_bh(&neigh->ifinfo_lock);
1091
1092
1093 hlist_for_each_entry_safe(neigh_ifinfo, node_tmp,
1094 &neigh->ifinfo_list, list) {
1095 if_outgoing = neigh_ifinfo->if_outgoing;
1096
1097
1098 if (if_outgoing == BATADV_IF_DEFAULT)
1099 continue;
1100
1101
1102 if (if_outgoing->if_status != BATADV_IF_INACTIVE &&
1103 if_outgoing->if_status != BATADV_IF_NOT_IN_USE &&
1104 if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED)
1105 continue;
1106
1107 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
1108 "neighbor/ifinfo purge: neighbor %pM, iface: %s\n",
1109 neigh->addr, if_outgoing->net_dev->name);
1110
1111 hlist_del_rcu(&neigh_ifinfo->list);
1112 batadv_neigh_ifinfo_put(neigh_ifinfo);
1113 }
1114
1115 spin_unlock_bh(&neigh->ifinfo_lock);
1116 }
1117
1118
1119
1120
1121
1122
1123
1124
1125 static bool
1126 batadv_purge_orig_ifinfo(struct batadv_priv *bat_priv,
1127 struct batadv_orig_node *orig_node)
1128 {
1129 struct batadv_orig_ifinfo *orig_ifinfo;
1130 struct batadv_hard_iface *if_outgoing;
1131 struct hlist_node *node_tmp;
1132 bool ifinfo_purged = false;
1133
1134 spin_lock_bh(&orig_node->neigh_list_lock);
1135
1136
1137 hlist_for_each_entry_safe(orig_ifinfo, node_tmp,
1138 &orig_node->ifinfo_list, list) {
1139 if_outgoing = orig_ifinfo->if_outgoing;
1140
1141
1142 if (if_outgoing == BATADV_IF_DEFAULT)
1143 continue;
1144
1145
1146 if (if_outgoing->if_status != BATADV_IF_INACTIVE &&
1147 if_outgoing->if_status != BATADV_IF_NOT_IN_USE &&
1148 if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED)
1149 continue;
1150
1151 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
1152 "router/ifinfo purge: originator %pM, iface: %s\n",
1153 orig_node->orig, if_outgoing->net_dev->name);
1154
1155 ifinfo_purged = true;
1156
1157 hlist_del_rcu(&orig_ifinfo->list);
1158 batadv_orig_ifinfo_put(orig_ifinfo);
1159 if (orig_node->last_bonding_candidate == orig_ifinfo) {
1160 orig_node->last_bonding_candidate = NULL;
1161 batadv_orig_ifinfo_put(orig_ifinfo);
1162 }
1163 }
1164
1165 spin_unlock_bh(&orig_node->neigh_list_lock);
1166
1167 return ifinfo_purged;
1168 }
1169
1170
1171
1172
1173
1174
1175
1176
1177 static bool
1178 batadv_purge_orig_neighbors(struct batadv_priv *bat_priv,
1179 struct batadv_orig_node *orig_node)
1180 {
1181 struct hlist_node *node_tmp;
1182 struct batadv_neigh_node *neigh_node;
1183 bool neigh_purged = false;
1184 unsigned long last_seen;
1185 struct batadv_hard_iface *if_incoming;
1186
1187 spin_lock_bh(&orig_node->neigh_list_lock);
1188
1189
1190 hlist_for_each_entry_safe(neigh_node, node_tmp,
1191 &orig_node->neigh_list, list) {
1192 last_seen = neigh_node->last_seen;
1193 if_incoming = neigh_node->if_incoming;
1194
1195 if (batadv_has_timed_out(last_seen, BATADV_PURGE_TIMEOUT) ||
1196 if_incoming->if_status == BATADV_IF_INACTIVE ||
1197 if_incoming->if_status == BATADV_IF_NOT_IN_USE ||
1198 if_incoming->if_status == BATADV_IF_TO_BE_REMOVED) {
1199 if (if_incoming->if_status == BATADV_IF_INACTIVE ||
1200 if_incoming->if_status == BATADV_IF_NOT_IN_USE ||
1201 if_incoming->if_status == BATADV_IF_TO_BE_REMOVED)
1202 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
1203 "neighbor purge: originator %pM, neighbor: %pM, iface: %s\n",
1204 orig_node->orig, neigh_node->addr,
1205 if_incoming->net_dev->name);
1206 else
1207 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
1208 "neighbor timeout: originator %pM, neighbor: %pM, last_seen: %u\n",
1209 orig_node->orig, neigh_node->addr,
1210 jiffies_to_msecs(last_seen));
1211
1212 neigh_purged = true;
1213
1214 hlist_del_rcu(&neigh_node->list);
1215 batadv_neigh_node_put(neigh_node);
1216 } else {
1217
1218
1219
1220 batadv_purge_neigh_ifinfo(bat_priv, neigh_node);
1221 }
1222 }
1223
1224 spin_unlock_bh(&orig_node->neigh_list_lock);
1225 return neigh_purged;
1226 }
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236 static struct batadv_neigh_node *
1237 batadv_find_best_neighbor(struct batadv_priv *bat_priv,
1238 struct batadv_orig_node *orig_node,
1239 struct batadv_hard_iface *if_outgoing)
1240 {
1241 struct batadv_neigh_node *best = NULL, *neigh;
1242 struct batadv_algo_ops *bao = bat_priv->algo_ops;
1243
1244 rcu_read_lock();
1245 hlist_for_each_entry_rcu(neigh, &orig_node->neigh_list, list) {
1246 if (best && (bao->neigh.cmp(neigh, if_outgoing, best,
1247 if_outgoing) <= 0))
1248 continue;
1249
1250 if (!kref_get_unless_zero(&neigh->refcount))
1251 continue;
1252
1253 if (best)
1254 batadv_neigh_node_put(best);
1255
1256 best = neigh;
1257 }
1258 rcu_read_unlock();
1259
1260 return best;
1261 }
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273 static bool batadv_purge_orig_node(struct batadv_priv *bat_priv,
1274 struct batadv_orig_node *orig_node)
1275 {
1276 struct batadv_neigh_node *best_neigh_node;
1277 struct batadv_hard_iface *hard_iface;
1278 bool changed_ifinfo, changed_neigh;
1279
1280 if (batadv_has_timed_out(orig_node->last_seen,
1281 2 * BATADV_PURGE_TIMEOUT)) {
1282 batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
1283 "Originator timeout: originator %pM, last_seen %u\n",
1284 orig_node->orig,
1285 jiffies_to_msecs(orig_node->last_seen));
1286 return true;
1287 }
1288 changed_ifinfo = batadv_purge_orig_ifinfo(bat_priv, orig_node);
1289 changed_neigh = batadv_purge_orig_neighbors(bat_priv, orig_node);
1290
1291 if (!changed_ifinfo && !changed_neigh)
1292 return false;
1293
1294
1295 best_neigh_node = batadv_find_best_neighbor(bat_priv, orig_node,
1296 BATADV_IF_DEFAULT);
1297 batadv_update_route(bat_priv, orig_node, BATADV_IF_DEFAULT,
1298 best_neigh_node);
1299 if (best_neigh_node)
1300 batadv_neigh_node_put(best_neigh_node);
1301
1302
1303 rcu_read_lock();
1304 list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
1305 if (hard_iface->if_status != BATADV_IF_ACTIVE)
1306 continue;
1307
1308 if (hard_iface->soft_iface != bat_priv->soft_iface)
1309 continue;
1310
1311 if (!kref_get_unless_zero(&hard_iface->refcount))
1312 continue;
1313
1314 best_neigh_node = batadv_find_best_neighbor(bat_priv,
1315 orig_node,
1316 hard_iface);
1317 batadv_update_route(bat_priv, orig_node, hard_iface,
1318 best_neigh_node);
1319 if (best_neigh_node)
1320 batadv_neigh_node_put(best_neigh_node);
1321
1322 batadv_hardif_put(hard_iface);
1323 }
1324 rcu_read_unlock();
1325
1326 return false;
1327 }
1328
1329
1330
1331
1332
1333 void batadv_purge_orig_ref(struct batadv_priv *bat_priv)
1334 {
1335 struct batadv_hashtable *hash = bat_priv->orig_hash;
1336 struct hlist_node *node_tmp;
1337 struct hlist_head *head;
1338 spinlock_t *list_lock;
1339 struct batadv_orig_node *orig_node;
1340 u32 i;
1341
1342 if (!hash)
1343 return;
1344
1345
1346 for (i = 0; i < hash->size; i++) {
1347 head = &hash->table[i];
1348 list_lock = &hash->list_locks[i];
1349
1350 spin_lock_bh(list_lock);
1351 hlist_for_each_entry_safe(orig_node, node_tmp,
1352 head, hash_entry) {
1353 if (batadv_purge_orig_node(bat_priv, orig_node)) {
1354 batadv_gw_node_delete(bat_priv, orig_node);
1355 hlist_del_rcu(&orig_node->hash_entry);
1356 batadv_tt_global_del_orig(orig_node->bat_priv,
1357 orig_node, -1,
1358 "originator timed out");
1359 batadv_orig_node_put(orig_node);
1360 continue;
1361 }
1362
1363 batadv_frag_purge_orig(orig_node,
1364 batadv_frag_check_entry);
1365 }
1366 spin_unlock_bh(list_lock);
1367 }
1368
1369 batadv_gw_election(bat_priv);
1370 }
1371
1372 static void batadv_purge_orig(struct work_struct *work)
1373 {
1374 struct delayed_work *delayed_work;
1375 struct batadv_priv *bat_priv;
1376
1377 delayed_work = to_delayed_work(work);
1378 bat_priv = container_of(delayed_work, struct batadv_priv, orig_work);
1379 batadv_purge_orig_ref(bat_priv);
1380 queue_delayed_work(batadv_event_workqueue,
1381 &bat_priv->orig_work,
1382 msecs_to_jiffies(BATADV_ORIG_WORK_PERIOD));
1383 }
1384
1385 #ifdef CONFIG_BATMAN_ADV_DEBUGFS
1386
1387
1388
1389
1390
1391
1392
1393
1394 int batadv_orig_seq_print_text(struct seq_file *seq, void *offset)
1395 {
1396 struct net_device *net_dev = (struct net_device *)seq->private;
1397 struct batadv_priv *bat_priv = netdev_priv(net_dev);
1398 struct batadv_hard_iface *primary_if;
1399
1400 primary_if = batadv_seq_print_text_primary_if_get(seq);
1401 if (!primary_if)
1402 return 0;
1403
1404 seq_printf(seq, "[B.A.T.M.A.N. adv %s, MainIF/MAC: %s/%pM (%s %s)]\n",
1405 BATADV_SOURCE_VERSION, primary_if->net_dev->name,
1406 primary_if->net_dev->dev_addr, net_dev->name,
1407 bat_priv->algo_ops->name);
1408
1409 batadv_hardif_put(primary_if);
1410
1411 if (!bat_priv->algo_ops->orig.print) {
1412 seq_puts(seq,
1413 "No printing function for this routing protocol\n");
1414 return 0;
1415 }
1416
1417 bat_priv->algo_ops->orig.print(bat_priv, seq, BATADV_IF_DEFAULT);
1418
1419 return 0;
1420 }
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430 int batadv_orig_hardif_seq_print_text(struct seq_file *seq, void *offset)
1431 {
1432 struct net_device *net_dev = (struct net_device *)seq->private;
1433 struct batadv_hard_iface *hard_iface;
1434 struct batadv_priv *bat_priv;
1435
1436 hard_iface = batadv_hardif_get_by_netdev(net_dev);
1437
1438 if (!hard_iface || !hard_iface->soft_iface) {
1439 seq_puts(seq, "Interface not known to B.A.T.M.A.N.\n");
1440 goto out;
1441 }
1442
1443 bat_priv = netdev_priv(hard_iface->soft_iface);
1444 if (!bat_priv->algo_ops->orig.print) {
1445 seq_puts(seq,
1446 "No printing function for this routing protocol\n");
1447 goto out;
1448 }
1449
1450 if (hard_iface->if_status != BATADV_IF_ACTIVE) {
1451 seq_puts(seq, "Interface not active\n");
1452 goto out;
1453 }
1454
1455 seq_printf(seq, "[B.A.T.M.A.N. adv %s, IF/MAC: %s/%pM (%s %s)]\n",
1456 BATADV_SOURCE_VERSION, hard_iface->net_dev->name,
1457 hard_iface->net_dev->dev_addr,
1458 hard_iface->soft_iface->name, bat_priv->algo_ops->name);
1459
1460 bat_priv->algo_ops->orig.print(bat_priv, seq, hard_iface);
1461
1462 out:
1463 if (hard_iface)
1464 batadv_hardif_put(hard_iface);
1465 return 0;
1466 }
1467 #endif
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477 int batadv_orig_dump(struct sk_buff *msg, struct netlink_callback *cb)
1478 {
1479 struct net *net = sock_net(cb->skb->sk);
1480 struct net_device *soft_iface;
1481 struct net_device *hard_iface = NULL;
1482 struct batadv_hard_iface *hardif = BATADV_IF_DEFAULT;
1483 struct batadv_priv *bat_priv;
1484 struct batadv_hard_iface *primary_if = NULL;
1485 int ret;
1486 int ifindex, hard_ifindex;
1487
1488 ifindex = batadv_netlink_get_ifindex(cb->nlh, BATADV_ATTR_MESH_IFINDEX);
1489 if (!ifindex)
1490 return -EINVAL;
1491
1492 soft_iface = dev_get_by_index(net, ifindex);
1493 if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
1494 ret = -ENODEV;
1495 goto out;
1496 }
1497
1498 bat_priv = netdev_priv(soft_iface);
1499
1500 primary_if = batadv_primary_if_get_selected(bat_priv);
1501 if (!primary_if || primary_if->if_status != BATADV_IF_ACTIVE) {
1502 ret = -ENOENT;
1503 goto out;
1504 }
1505
1506 hard_ifindex = batadv_netlink_get_ifindex(cb->nlh,
1507 BATADV_ATTR_HARD_IFINDEX);
1508 if (hard_ifindex) {
1509 hard_iface = dev_get_by_index(net, hard_ifindex);
1510 if (hard_iface)
1511 hardif = batadv_hardif_get_by_netdev(hard_iface);
1512
1513 if (!hardif) {
1514 ret = -ENODEV;
1515 goto out;
1516 }
1517
1518 if (hardif->soft_iface != soft_iface) {
1519 ret = -ENOENT;
1520 goto out;
1521 }
1522 }
1523
1524 if (!bat_priv->algo_ops->orig.dump) {
1525 ret = -EOPNOTSUPP;
1526 goto out;
1527 }
1528
1529 bat_priv->algo_ops->orig.dump(msg, cb, bat_priv, hardif);
1530
1531 ret = msg->len;
1532
1533 out:
1534 if (hardif)
1535 batadv_hardif_put(hardif);
1536 if (hard_iface)
1537 dev_put(hard_iface);
1538 if (primary_if)
1539 batadv_hardif_put(primary_if);
1540 if (soft_iface)
1541 dev_put(soft_iface);
1542
1543 return ret;
1544 }