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7#include <linux/etherdevice.h>
8#include <linux/list.h>
9#include <linux/random.h>
10#include <linux/slab.h>
11#include <linux/spinlock.h>
12#include <linux/string.h>
13#include <net/mac80211.h>
14#include "wme.h"
15#include "ieee80211_i.h"
16#include "mesh.h"
17
18static void mesh_path_free_rcu(struct mesh_table *tbl, struct mesh_path *mpath);
19
20static u32 mesh_table_hash(const void *addr, u32 len, u32 seed)
21{
22
23 return jhash_1word(__get_unaligned_cpu32((u8 *)addr + 2), seed);
24}
25
26static const struct rhashtable_params mesh_rht_params = {
27 .nelem_hint = 2,
28 .automatic_shrinking = true,
29 .key_len = ETH_ALEN,
30 .key_offset = offsetof(struct mesh_path, dst),
31 .head_offset = offsetof(struct mesh_path, rhash),
32 .hashfn = mesh_table_hash,
33};
34
35static inline bool mpath_expired(struct mesh_path *mpath)
36{
37 return (mpath->flags & MESH_PATH_ACTIVE) &&
38 time_after(jiffies, mpath->exp_time) &&
39 !(mpath->flags & MESH_PATH_FIXED);
40}
41
42static void mesh_path_rht_free(void *ptr, void *tblptr)
43{
44 struct mesh_path *mpath = ptr;
45 struct mesh_table *tbl = tblptr;
46
47 mesh_path_free_rcu(tbl, mpath);
48}
49
50static struct mesh_table *mesh_table_alloc(void)
51{
52 struct mesh_table *newtbl;
53
54 newtbl = kmalloc(sizeof(struct mesh_table), GFP_ATOMIC);
55 if (!newtbl)
56 return NULL;
57
58 INIT_HLIST_HEAD(&newtbl->known_gates);
59 INIT_HLIST_HEAD(&newtbl->walk_head);
60 atomic_set(&newtbl->entries, 0);
61 spin_lock_init(&newtbl->gates_lock);
62 spin_lock_init(&newtbl->walk_lock);
63
64 return newtbl;
65}
66
67static void mesh_table_free(struct mesh_table *tbl)
68{
69 rhashtable_free_and_destroy(&tbl->rhead,
70 mesh_path_rht_free, tbl);
71 kfree(tbl);
72}
73
74
75
76
77
78
79
80
81
82void mesh_path_assign_nexthop(struct mesh_path *mpath, struct sta_info *sta)
83{
84 struct sk_buff *skb;
85 struct ieee80211_hdr *hdr;
86 unsigned long flags;
87
88 rcu_assign_pointer(mpath->next_hop, sta);
89
90 spin_lock_irqsave(&mpath->frame_queue.lock, flags);
91 skb_queue_walk(&mpath->frame_queue, skb) {
92 hdr = (struct ieee80211_hdr *) skb->data;
93 memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN);
94 memcpy(hdr->addr2, mpath->sdata->vif.addr, ETH_ALEN);
95 ieee80211_mps_set_frame_flags(sta->sdata, sta, hdr);
96 }
97
98 spin_unlock_irqrestore(&mpath->frame_queue.lock, flags);
99}
100
101static void prepare_for_gate(struct sk_buff *skb, char *dst_addr,
102 struct mesh_path *gate_mpath)
103{
104 struct ieee80211_hdr *hdr;
105 struct ieee80211s_hdr *mshdr;
106 int mesh_hdrlen, hdrlen;
107 char *next_hop;
108
109 hdr = (struct ieee80211_hdr *) skb->data;
110 hdrlen = ieee80211_hdrlen(hdr->frame_control);
111 mshdr = (struct ieee80211s_hdr *) (skb->data + hdrlen);
112
113 if (!(mshdr->flags & MESH_FLAGS_AE)) {
114
115 mesh_hdrlen = 6;
116
117
118 skb_push(skb, 2 * ETH_ALEN);
119 memmove(skb->data, hdr, hdrlen + mesh_hdrlen);
120
121 hdr = (struct ieee80211_hdr *) skb->data;
122
123
124
125 mshdr = (struct ieee80211s_hdr *) (skb->data + hdrlen);
126 mshdr->flags = MESH_FLAGS_AE_A5_A6;
127 memcpy(mshdr->eaddr1, hdr->addr3, ETH_ALEN);
128 memcpy(mshdr->eaddr2, hdr->addr4, ETH_ALEN);
129 }
130
131
132 hdr = (struct ieee80211_hdr *) skb->data;
133 rcu_read_lock();
134 next_hop = rcu_dereference(gate_mpath->next_hop)->sta.addr;
135 memcpy(hdr->addr1, next_hop, ETH_ALEN);
136 rcu_read_unlock();
137 memcpy(hdr->addr2, gate_mpath->sdata->vif.addr, ETH_ALEN);
138 memcpy(hdr->addr3, dst_addr, ETH_ALEN);
139}
140
141
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152
153
154
155
156
157
158static void mesh_path_move_to_queue(struct mesh_path *gate_mpath,
159 struct mesh_path *from_mpath,
160 bool copy)
161{
162 struct sk_buff *skb, *fskb, *tmp;
163 struct sk_buff_head failq;
164 unsigned long flags;
165
166 if (WARN_ON(gate_mpath == from_mpath))
167 return;
168 if (WARN_ON(!gate_mpath->next_hop))
169 return;
170
171 __skb_queue_head_init(&failq);
172
173 spin_lock_irqsave(&from_mpath->frame_queue.lock, flags);
174 skb_queue_splice_init(&from_mpath->frame_queue, &failq);
175 spin_unlock_irqrestore(&from_mpath->frame_queue.lock, flags);
176
177 skb_queue_walk_safe(&failq, fskb, tmp) {
178 if (skb_queue_len(&gate_mpath->frame_queue) >=
179 MESH_FRAME_QUEUE_LEN) {
180 mpath_dbg(gate_mpath->sdata, "mpath queue full!\n");
181 break;
182 }
183
184 skb = skb_copy(fskb, GFP_ATOMIC);
185 if (WARN_ON(!skb))
186 break;
187
188 prepare_for_gate(skb, gate_mpath->dst, gate_mpath);
189 skb_queue_tail(&gate_mpath->frame_queue, skb);
190
191 if (copy)
192 continue;
193
194 __skb_unlink(fskb, &failq);
195 kfree_skb(fskb);
196 }
197
198 mpath_dbg(gate_mpath->sdata, "Mpath queue for gate %pM has %d frames\n",
199 gate_mpath->dst, skb_queue_len(&gate_mpath->frame_queue));
200
201 if (!copy)
202 return;
203
204 spin_lock_irqsave(&from_mpath->frame_queue.lock, flags);
205 skb_queue_splice(&failq, &from_mpath->frame_queue);
206 spin_unlock_irqrestore(&from_mpath->frame_queue.lock, flags);
207}
208
209
210static struct mesh_path *mpath_lookup(struct mesh_table *tbl, const u8 *dst,
211 struct ieee80211_sub_if_data *sdata)
212{
213 struct mesh_path *mpath;
214
215 mpath = rhashtable_lookup(&tbl->rhead, dst, mesh_rht_params);
216
217 if (mpath && mpath_expired(mpath)) {
218 spin_lock_bh(&mpath->state_lock);
219 mpath->flags &= ~MESH_PATH_ACTIVE;
220 spin_unlock_bh(&mpath->state_lock);
221 }
222 return mpath;
223}
224
225
226
227
228
229
230
231
232
233
234struct mesh_path *
235mesh_path_lookup(struct ieee80211_sub_if_data *sdata, const u8 *dst)
236{
237 return mpath_lookup(sdata->u.mesh.mesh_paths, dst, sdata);
238}
239
240struct mesh_path *
241mpp_path_lookup(struct ieee80211_sub_if_data *sdata, const u8 *dst)
242{
243 return mpath_lookup(sdata->u.mesh.mpp_paths, dst, sdata);
244}
245
246static struct mesh_path *
247__mesh_path_lookup_by_idx(struct mesh_table *tbl, int idx)
248{
249 int i = 0;
250 struct mesh_path *mpath;
251
252 hlist_for_each_entry_rcu(mpath, &tbl->walk_head, walk_list) {
253 if (i++ == idx)
254 break;
255 }
256
257 if (!mpath)
258 return NULL;
259
260 if (mpath_expired(mpath)) {
261 spin_lock_bh(&mpath->state_lock);
262 mpath->flags &= ~MESH_PATH_ACTIVE;
263 spin_unlock_bh(&mpath->state_lock);
264 }
265 return mpath;
266}
267
268
269
270
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273
274
275
276
277struct mesh_path *
278mesh_path_lookup_by_idx(struct ieee80211_sub_if_data *sdata, int idx)
279{
280 return __mesh_path_lookup_by_idx(sdata->u.mesh.mesh_paths, idx);
281}
282
283
284
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286
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288
289
290
291
292struct mesh_path *
293mpp_path_lookup_by_idx(struct ieee80211_sub_if_data *sdata, int idx)
294{
295 return __mesh_path_lookup_by_idx(sdata->u.mesh.mpp_paths, idx);
296}
297
298
299
300
301
302int mesh_path_add_gate(struct mesh_path *mpath)
303{
304 struct mesh_table *tbl;
305 int err;
306
307 rcu_read_lock();
308 tbl = mpath->sdata->u.mesh.mesh_paths;
309
310 spin_lock_bh(&mpath->state_lock);
311 if (mpath->is_gate) {
312 err = -EEXIST;
313 spin_unlock_bh(&mpath->state_lock);
314 goto err_rcu;
315 }
316 mpath->is_gate = true;
317 mpath->sdata->u.mesh.num_gates++;
318
319 spin_lock(&tbl->gates_lock);
320 hlist_add_head_rcu(&mpath->gate_list, &tbl->known_gates);
321 spin_unlock(&tbl->gates_lock);
322
323 spin_unlock_bh(&mpath->state_lock);
324
325 mpath_dbg(mpath->sdata,
326 "Mesh path: Recorded new gate: %pM. %d known gates\n",
327 mpath->dst, mpath->sdata->u.mesh.num_gates);
328 err = 0;
329err_rcu:
330 rcu_read_unlock();
331 return err;
332}
333
334
335
336
337
338
339static void mesh_gate_del(struct mesh_table *tbl, struct mesh_path *mpath)
340{
341 lockdep_assert_held(&mpath->state_lock);
342 if (!mpath->is_gate)
343 return;
344
345 mpath->is_gate = false;
346 spin_lock_bh(&tbl->gates_lock);
347 hlist_del_rcu(&mpath->gate_list);
348 mpath->sdata->u.mesh.num_gates--;
349 spin_unlock_bh(&tbl->gates_lock);
350
351 mpath_dbg(mpath->sdata,
352 "Mesh path: Deleted gate: %pM. %d known gates\n",
353 mpath->dst, mpath->sdata->u.mesh.num_gates);
354}
355
356
357
358
359
360int mesh_gate_num(struct ieee80211_sub_if_data *sdata)
361{
362 return sdata->u.mesh.num_gates;
363}
364
365static
366struct mesh_path *mesh_path_new(struct ieee80211_sub_if_data *sdata,
367 const u8 *dst, gfp_t gfp_flags)
368{
369 struct mesh_path *new_mpath;
370
371 new_mpath = kzalloc(sizeof(struct mesh_path), gfp_flags);
372 if (!new_mpath)
373 return NULL;
374
375 memcpy(new_mpath->dst, dst, ETH_ALEN);
376 eth_broadcast_addr(new_mpath->rann_snd_addr);
377 new_mpath->is_root = false;
378 new_mpath->sdata = sdata;
379 new_mpath->flags = 0;
380 skb_queue_head_init(&new_mpath->frame_queue);
381 new_mpath->exp_time = jiffies;
382 spin_lock_init(&new_mpath->state_lock);
383 timer_setup(&new_mpath->timer, mesh_path_timer, 0);
384
385 return new_mpath;
386}
387
388
389
390
391
392
393
394
395
396
397struct mesh_path *mesh_path_add(struct ieee80211_sub_if_data *sdata,
398 const u8 *dst)
399{
400 struct mesh_table *tbl;
401 struct mesh_path *mpath, *new_mpath;
402
403 if (ether_addr_equal(dst, sdata->vif.addr))
404
405 return ERR_PTR(-ENOTSUPP);
406
407 if (is_multicast_ether_addr(dst))
408 return ERR_PTR(-ENOTSUPP);
409
410 if (atomic_add_unless(&sdata->u.mesh.mpaths, 1, MESH_MAX_MPATHS) == 0)
411 return ERR_PTR(-ENOSPC);
412
413 new_mpath = mesh_path_new(sdata, dst, GFP_ATOMIC);
414 if (!new_mpath)
415 return ERR_PTR(-ENOMEM);
416
417 tbl = sdata->u.mesh.mesh_paths;
418 spin_lock_bh(&tbl->walk_lock);
419 mpath = rhashtable_lookup_get_insert_fast(&tbl->rhead,
420 &new_mpath->rhash,
421 mesh_rht_params);
422 if (!mpath)
423 hlist_add_head(&new_mpath->walk_list, &tbl->walk_head);
424 spin_unlock_bh(&tbl->walk_lock);
425
426 if (mpath) {
427 kfree(new_mpath);
428
429 if (IS_ERR(mpath))
430 return mpath;
431
432 new_mpath = mpath;
433 }
434
435 sdata->u.mesh.mesh_paths_generation++;
436 return new_mpath;
437}
438
439int mpp_path_add(struct ieee80211_sub_if_data *sdata,
440 const u8 *dst, const u8 *mpp)
441{
442 struct mesh_table *tbl;
443 struct mesh_path *new_mpath;
444 int ret;
445
446 if (ether_addr_equal(dst, sdata->vif.addr))
447
448 return -ENOTSUPP;
449
450 if (is_multicast_ether_addr(dst))
451 return -ENOTSUPP;
452
453 new_mpath = mesh_path_new(sdata, dst, GFP_ATOMIC);
454
455 if (!new_mpath)
456 return -ENOMEM;
457
458 memcpy(new_mpath->mpp, mpp, ETH_ALEN);
459 tbl = sdata->u.mesh.mpp_paths;
460
461 spin_lock_bh(&tbl->walk_lock);
462 ret = rhashtable_lookup_insert_fast(&tbl->rhead,
463 &new_mpath->rhash,
464 mesh_rht_params);
465 if (!ret)
466 hlist_add_head_rcu(&new_mpath->walk_list, &tbl->walk_head);
467 spin_unlock_bh(&tbl->walk_lock);
468
469 if (ret)
470 kfree(new_mpath);
471
472 sdata->u.mesh.mpp_paths_generation++;
473 return ret;
474}
475
476
477
478
479
480
481
482
483
484
485void mesh_plink_broken(struct sta_info *sta)
486{
487 struct ieee80211_sub_if_data *sdata = sta->sdata;
488 struct mesh_table *tbl = sdata->u.mesh.mesh_paths;
489 static const u8 bcast[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
490 struct mesh_path *mpath;
491
492 rcu_read_lock();
493 hlist_for_each_entry_rcu(mpath, &tbl->walk_head, walk_list) {
494 if (rcu_access_pointer(mpath->next_hop) == sta &&
495 mpath->flags & MESH_PATH_ACTIVE &&
496 !(mpath->flags & MESH_PATH_FIXED)) {
497 spin_lock_bh(&mpath->state_lock);
498 mpath->flags &= ~MESH_PATH_ACTIVE;
499 ++mpath->sn;
500 spin_unlock_bh(&mpath->state_lock);
501 mesh_path_error_tx(sdata,
502 sdata->u.mesh.mshcfg.element_ttl,
503 mpath->dst, mpath->sn,
504 WLAN_REASON_MESH_PATH_DEST_UNREACHABLE, bcast);
505 }
506 }
507 rcu_read_unlock();
508}
509
510static void mesh_path_free_rcu(struct mesh_table *tbl,
511 struct mesh_path *mpath)
512{
513 struct ieee80211_sub_if_data *sdata = mpath->sdata;
514
515 spin_lock_bh(&mpath->state_lock);
516 mpath->flags |= MESH_PATH_RESOLVING | MESH_PATH_DELETED;
517 mesh_gate_del(tbl, mpath);
518 spin_unlock_bh(&mpath->state_lock);
519 del_timer_sync(&mpath->timer);
520 atomic_dec(&sdata->u.mesh.mpaths);
521 atomic_dec(&tbl->entries);
522 mesh_path_flush_pending(mpath);
523 kfree_rcu(mpath, rcu);
524}
525
526static void __mesh_path_del(struct mesh_table *tbl, struct mesh_path *mpath)
527{
528 hlist_del_rcu(&mpath->walk_list);
529 rhashtable_remove_fast(&tbl->rhead, &mpath->rhash, mesh_rht_params);
530 mesh_path_free_rcu(tbl, mpath);
531}
532
533
534
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536
537
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539
540
541
542
543
544void mesh_path_flush_by_nexthop(struct sta_info *sta)
545{
546 struct ieee80211_sub_if_data *sdata = sta->sdata;
547 struct mesh_table *tbl = sdata->u.mesh.mesh_paths;
548 struct mesh_path *mpath;
549 struct hlist_node *n;
550
551 spin_lock_bh(&tbl->walk_lock);
552 hlist_for_each_entry_safe(mpath, n, &tbl->walk_head, walk_list) {
553 if (rcu_access_pointer(mpath->next_hop) == sta)
554 __mesh_path_del(tbl, mpath);
555 }
556 spin_unlock_bh(&tbl->walk_lock);
557}
558
559static void mpp_flush_by_proxy(struct ieee80211_sub_if_data *sdata,
560 const u8 *proxy)
561{
562 struct mesh_table *tbl = sdata->u.mesh.mpp_paths;
563 struct mesh_path *mpath;
564 struct hlist_node *n;
565
566 spin_lock_bh(&tbl->walk_lock);
567 hlist_for_each_entry_safe(mpath, n, &tbl->walk_head, walk_list) {
568 if (ether_addr_equal(mpath->mpp, proxy))
569 __mesh_path_del(tbl, mpath);
570 }
571 spin_unlock_bh(&tbl->walk_lock);
572}
573
574static void table_flush_by_iface(struct mesh_table *tbl)
575{
576 struct mesh_path *mpath;
577 struct hlist_node *n;
578
579 spin_lock_bh(&tbl->walk_lock);
580 hlist_for_each_entry_safe(mpath, n, &tbl->walk_head, walk_list) {
581 __mesh_path_del(tbl, mpath);
582 }
583 spin_unlock_bh(&tbl->walk_lock);
584}
585
586
587
588
589
590
591
592
593
594void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata)
595{
596 table_flush_by_iface(sdata->u.mesh.mesh_paths);
597 table_flush_by_iface(sdata->u.mesh.mpp_paths);
598}
599
600
601
602
603
604
605
606
607
608
609static int table_path_del(struct mesh_table *tbl,
610 struct ieee80211_sub_if_data *sdata,
611 const u8 *addr)
612{
613 struct mesh_path *mpath;
614
615 spin_lock_bh(&tbl->walk_lock);
616 mpath = rhashtable_lookup_fast(&tbl->rhead, addr, mesh_rht_params);
617 if (!mpath) {
618 spin_unlock_bh(&tbl->walk_lock);
619 return -ENXIO;
620 }
621
622 __mesh_path_del(tbl, mpath);
623 spin_unlock_bh(&tbl->walk_lock);
624 return 0;
625}
626
627
628
629
630
631
632
633
634
635
636int mesh_path_del(struct ieee80211_sub_if_data *sdata, const u8 *addr)
637{
638 int err;
639
640
641 mpp_flush_by_proxy(sdata, addr);
642
643 err = table_path_del(sdata->u.mesh.mesh_paths, sdata, addr);
644 sdata->u.mesh.mesh_paths_generation++;
645 return err;
646}
647
648
649
650
651
652
653
654
655
656void mesh_path_tx_pending(struct mesh_path *mpath)
657{
658 if (mpath->flags & MESH_PATH_ACTIVE)
659 ieee80211_add_pending_skbs(mpath->sdata->local,
660 &mpath->frame_queue);
661}
662
663
664
665
666
667
668
669
670
671
672
673int mesh_path_send_to_gates(struct mesh_path *mpath)
674{
675 struct ieee80211_sub_if_data *sdata = mpath->sdata;
676 struct mesh_table *tbl;
677 struct mesh_path *from_mpath = mpath;
678 struct mesh_path *gate;
679 bool copy = false;
680
681 tbl = sdata->u.mesh.mesh_paths;
682
683 rcu_read_lock();
684 hlist_for_each_entry_rcu(gate, &tbl->known_gates, gate_list) {
685 if (gate->flags & MESH_PATH_ACTIVE) {
686 mpath_dbg(sdata, "Forwarding to %pM\n", gate->dst);
687 mesh_path_move_to_queue(gate, from_mpath, copy);
688 from_mpath = gate;
689 copy = true;
690 } else {
691 mpath_dbg(sdata,
692 "Not forwarding to %pM (flags %#x)\n",
693 gate->dst, gate->flags);
694 }
695 }
696
697 hlist_for_each_entry_rcu(gate, &tbl->known_gates, gate_list) {
698 mpath_dbg(sdata, "Sending to %pM\n", gate->dst);
699 mesh_path_tx_pending(gate);
700 }
701 rcu_read_unlock();
702
703 return (from_mpath == mpath) ? -EHOSTUNREACH : 0;
704}
705
706
707
708
709
710
711
712
713
714void mesh_path_discard_frame(struct ieee80211_sub_if_data *sdata,
715 struct sk_buff *skb)
716{
717 kfree_skb(skb);
718 sdata->u.mesh.mshstats.dropped_frames_no_route++;
719}
720
721
722
723
724
725
726
727
728void mesh_path_flush_pending(struct mesh_path *mpath)
729{
730 struct sk_buff *skb;
731
732 while ((skb = skb_dequeue(&mpath->frame_queue)) != NULL)
733 mesh_path_discard_frame(mpath->sdata, skb);
734}
735
736
737
738
739
740
741
742
743
744void mesh_path_fix_nexthop(struct mesh_path *mpath, struct sta_info *next_hop)
745{
746 spin_lock_bh(&mpath->state_lock);
747 mesh_path_assign_nexthop(mpath, next_hop);
748 mpath->sn = 0xffff;
749 mpath->metric = 0;
750 mpath->hop_count = 0;
751 mpath->exp_time = 0;
752 mpath->flags = MESH_PATH_FIXED | MESH_PATH_SN_VALID;
753 mesh_path_activate(mpath);
754 spin_unlock_bh(&mpath->state_lock);
755 ewma_mesh_fail_avg_init(&next_hop->mesh->fail_avg);
756
757 ewma_mesh_fail_avg_add(&next_hop->mesh->fail_avg, 1);
758 mesh_path_tx_pending(mpath);
759}
760
761int mesh_pathtbl_init(struct ieee80211_sub_if_data *sdata)
762{
763 struct mesh_table *tbl_path, *tbl_mpp;
764 int ret;
765
766 tbl_path = mesh_table_alloc();
767 if (!tbl_path)
768 return -ENOMEM;
769
770 tbl_mpp = mesh_table_alloc();
771 if (!tbl_mpp) {
772 ret = -ENOMEM;
773 goto free_path;
774 }
775
776 rhashtable_init(&tbl_path->rhead, &mesh_rht_params);
777 rhashtable_init(&tbl_mpp->rhead, &mesh_rht_params);
778
779 sdata->u.mesh.mesh_paths = tbl_path;
780 sdata->u.mesh.mpp_paths = tbl_mpp;
781
782 return 0;
783
784free_path:
785 mesh_table_free(tbl_path);
786 return ret;
787}
788
789static
790void mesh_path_tbl_expire(struct ieee80211_sub_if_data *sdata,
791 struct mesh_table *tbl)
792{
793 struct mesh_path *mpath;
794 struct hlist_node *n;
795
796 spin_lock_bh(&tbl->walk_lock);
797 hlist_for_each_entry_safe(mpath, n, &tbl->walk_head, walk_list) {
798 if ((!(mpath->flags & MESH_PATH_RESOLVING)) &&
799 (!(mpath->flags & MESH_PATH_FIXED)) &&
800 time_after(jiffies, mpath->exp_time + MESH_PATH_EXPIRE))
801 __mesh_path_del(tbl, mpath);
802 }
803 spin_unlock_bh(&tbl->walk_lock);
804}
805
806void mesh_path_expire(struct ieee80211_sub_if_data *sdata)
807{
808 mesh_path_tbl_expire(sdata, sdata->u.mesh.mesh_paths);
809 mesh_path_tbl_expire(sdata, sdata->u.mesh.mpp_paths);
810}
811
812void mesh_pathtbl_unregister(struct ieee80211_sub_if_data *sdata)
813{
814 mesh_table_free(sdata->u.mesh.mesh_paths);
815 mesh_table_free(sdata->u.mesh.mpp_paths);
816}
817