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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 if (rhashtable_init(&newtbl->rhead, &mesh_rht_params)) {
64 kfree(newtbl);
65 return NULL;
66 }
67
68 return newtbl;
69}
70
71static void mesh_table_free(struct mesh_table *tbl)
72{
73 rhashtable_free_and_destroy(&tbl->rhead,
74 mesh_path_rht_free, tbl);
75 kfree(tbl);
76}
77
78
79
80
81
82
83
84
85
86void mesh_path_assign_nexthop(struct mesh_path *mpath, struct sta_info *sta)
87{
88 struct sk_buff *skb;
89 struct ieee80211_hdr *hdr;
90 unsigned long flags;
91
92 rcu_assign_pointer(mpath->next_hop, sta);
93
94 spin_lock_irqsave(&mpath->frame_queue.lock, flags);
95 skb_queue_walk(&mpath->frame_queue, skb) {
96 hdr = (struct ieee80211_hdr *) skb->data;
97 memcpy(hdr->addr1, sta->sta.addr, ETH_ALEN);
98 memcpy(hdr->addr2, mpath->sdata->vif.addr, ETH_ALEN);
99 ieee80211_mps_set_frame_flags(sta->sdata, sta, hdr);
100 }
101
102 spin_unlock_irqrestore(&mpath->frame_queue.lock, flags);
103}
104
105static void prepare_for_gate(struct sk_buff *skb, char *dst_addr,
106 struct mesh_path *gate_mpath)
107{
108 struct ieee80211_hdr *hdr;
109 struct ieee80211s_hdr *mshdr;
110 int mesh_hdrlen, hdrlen;
111 char *next_hop;
112
113 hdr = (struct ieee80211_hdr *) skb->data;
114 hdrlen = ieee80211_hdrlen(hdr->frame_control);
115 mshdr = (struct ieee80211s_hdr *) (skb->data + hdrlen);
116
117 if (!(mshdr->flags & MESH_FLAGS_AE)) {
118
119 mesh_hdrlen = 6;
120
121
122 skb_push(skb, 2 * ETH_ALEN);
123 memmove(skb->data, hdr, hdrlen + mesh_hdrlen);
124
125 hdr = (struct ieee80211_hdr *) skb->data;
126
127
128
129 mshdr = (struct ieee80211s_hdr *) (skb->data + hdrlen);
130 mshdr->flags = MESH_FLAGS_AE_A5_A6;
131 memcpy(mshdr->eaddr1, hdr->addr3, ETH_ALEN);
132 memcpy(mshdr->eaddr2, hdr->addr4, ETH_ALEN);
133 }
134
135
136 hdr = (struct ieee80211_hdr *) skb->data;
137 rcu_read_lock();
138 next_hop = rcu_dereference(gate_mpath->next_hop)->sta.addr;
139 memcpy(hdr->addr1, next_hop, ETH_ALEN);
140 rcu_read_unlock();
141 memcpy(hdr->addr2, gate_mpath->sdata->vif.addr, ETH_ALEN);
142 memcpy(hdr->addr3, dst_addr, ETH_ALEN);
143}
144
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159
160
161
162static void mesh_path_move_to_queue(struct mesh_path *gate_mpath,
163 struct mesh_path *from_mpath,
164 bool copy)
165{
166 struct sk_buff *skb, *fskb, *tmp;
167 struct sk_buff_head failq;
168 unsigned long flags;
169
170 if (WARN_ON(gate_mpath == from_mpath))
171 return;
172 if (WARN_ON(!gate_mpath->next_hop))
173 return;
174
175 __skb_queue_head_init(&failq);
176
177 spin_lock_irqsave(&from_mpath->frame_queue.lock, flags);
178 skb_queue_splice_init(&from_mpath->frame_queue, &failq);
179 spin_unlock_irqrestore(&from_mpath->frame_queue.lock, flags);
180
181 skb_queue_walk_safe(&failq, fskb, tmp) {
182 if (skb_queue_len(&gate_mpath->frame_queue) >=
183 MESH_FRAME_QUEUE_LEN) {
184 mpath_dbg(gate_mpath->sdata, "mpath queue full!\n");
185 break;
186 }
187
188 skb = skb_copy(fskb, GFP_ATOMIC);
189 if (WARN_ON(!skb))
190 break;
191
192 prepare_for_gate(skb, gate_mpath->dst, gate_mpath);
193 skb_queue_tail(&gate_mpath->frame_queue, skb);
194
195 if (copy)
196 continue;
197
198 __skb_unlink(fskb, &failq);
199 kfree_skb(fskb);
200 }
201
202 mpath_dbg(gate_mpath->sdata, "Mpath queue for gate %pM has %d frames\n",
203 gate_mpath->dst, skb_queue_len(&gate_mpath->frame_queue));
204
205 if (!copy)
206 return;
207
208 spin_lock_irqsave(&from_mpath->frame_queue.lock, flags);
209 skb_queue_splice(&failq, &from_mpath->frame_queue);
210 spin_unlock_irqrestore(&from_mpath->frame_queue.lock, flags);
211}
212
213
214static struct mesh_path *mpath_lookup(struct mesh_table *tbl, const u8 *dst,
215 struct ieee80211_sub_if_data *sdata)
216{
217 struct mesh_path *mpath;
218
219 mpath = rhashtable_lookup(&tbl->rhead, dst, mesh_rht_params);
220
221 if (mpath && mpath_expired(mpath)) {
222 spin_lock_bh(&mpath->state_lock);
223 mpath->flags &= ~MESH_PATH_ACTIVE;
224 spin_unlock_bh(&mpath->state_lock);
225 }
226 return mpath;
227}
228
229
230
231
232
233
234
235
236
237
238struct mesh_path *
239mesh_path_lookup(struct ieee80211_sub_if_data *sdata, const u8 *dst)
240{
241 return mpath_lookup(sdata->u.mesh.mesh_paths, dst, sdata);
242}
243
244struct mesh_path *
245mpp_path_lookup(struct ieee80211_sub_if_data *sdata, const u8 *dst)
246{
247 return mpath_lookup(sdata->u.mesh.mpp_paths, dst, sdata);
248}
249
250static struct mesh_path *
251__mesh_path_lookup_by_idx(struct mesh_table *tbl, int idx)
252{
253 int i = 0;
254 struct mesh_path *mpath;
255
256 hlist_for_each_entry_rcu(mpath, &tbl->walk_head, walk_list) {
257 if (i++ == idx)
258 break;
259 }
260
261 if (!mpath)
262 return NULL;
263
264 if (mpath_expired(mpath)) {
265 spin_lock_bh(&mpath->state_lock);
266 mpath->flags &= ~MESH_PATH_ACTIVE;
267 spin_unlock_bh(&mpath->state_lock);
268 }
269 return mpath;
270}
271
272
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277
278
279
280
281struct mesh_path *
282mesh_path_lookup_by_idx(struct ieee80211_sub_if_data *sdata, int idx)
283{
284 return __mesh_path_lookup_by_idx(sdata->u.mesh.mesh_paths, idx);
285}
286
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291
292
293
294
295
296struct mesh_path *
297mpp_path_lookup_by_idx(struct ieee80211_sub_if_data *sdata, int idx)
298{
299 return __mesh_path_lookup_by_idx(sdata->u.mesh.mpp_paths, idx);
300}
301
302
303
304
305
306int mesh_path_add_gate(struct mesh_path *mpath)
307{
308 struct mesh_table *tbl;
309 int err;
310
311 rcu_read_lock();
312 tbl = mpath->sdata->u.mesh.mesh_paths;
313
314 spin_lock_bh(&mpath->state_lock);
315 if (mpath->is_gate) {
316 err = -EEXIST;
317 spin_unlock_bh(&mpath->state_lock);
318 goto err_rcu;
319 }
320 mpath->is_gate = true;
321 mpath->sdata->u.mesh.num_gates++;
322
323 spin_lock(&tbl->gates_lock);
324 hlist_add_head_rcu(&mpath->gate_list, &tbl->known_gates);
325 spin_unlock(&tbl->gates_lock);
326
327 spin_unlock_bh(&mpath->state_lock);
328
329 mpath_dbg(mpath->sdata,
330 "Mesh path: Recorded new gate: %pM. %d known gates\n",
331 mpath->dst, mpath->sdata->u.mesh.num_gates);
332 err = 0;
333err_rcu:
334 rcu_read_unlock();
335 return err;
336}
337
338
339
340
341
342
343static void mesh_gate_del(struct mesh_table *tbl, struct mesh_path *mpath)
344{
345 lockdep_assert_held(&mpath->state_lock);
346 if (!mpath->is_gate)
347 return;
348
349 mpath->is_gate = false;
350 spin_lock_bh(&tbl->gates_lock);
351 hlist_del_rcu(&mpath->gate_list);
352 mpath->sdata->u.mesh.num_gates--;
353 spin_unlock_bh(&tbl->gates_lock);
354
355 mpath_dbg(mpath->sdata,
356 "Mesh path: Deleted gate: %pM. %d known gates\n",
357 mpath->dst, mpath->sdata->u.mesh.num_gates);
358}
359
360
361
362
363
364int mesh_gate_num(struct ieee80211_sub_if_data *sdata)
365{
366 return sdata->u.mesh.num_gates;
367}
368
369static
370struct mesh_path *mesh_path_new(struct ieee80211_sub_if_data *sdata,
371 const u8 *dst, gfp_t gfp_flags)
372{
373 struct mesh_path *new_mpath;
374
375 new_mpath = kzalloc(sizeof(struct mesh_path), gfp_flags);
376 if (!new_mpath)
377 return NULL;
378
379 memcpy(new_mpath->dst, dst, ETH_ALEN);
380 eth_broadcast_addr(new_mpath->rann_snd_addr);
381 new_mpath->is_root = false;
382 new_mpath->sdata = sdata;
383 new_mpath->flags = 0;
384 skb_queue_head_init(&new_mpath->frame_queue);
385 new_mpath->exp_time = jiffies;
386 spin_lock_init(&new_mpath->state_lock);
387 timer_setup(&new_mpath->timer, mesh_path_timer, 0);
388
389 return new_mpath;
390}
391
392
393
394
395
396
397
398
399
400
401struct mesh_path *mesh_path_add(struct ieee80211_sub_if_data *sdata,
402 const u8 *dst)
403{
404 struct mesh_table *tbl;
405 struct mesh_path *mpath, *new_mpath;
406
407 if (ether_addr_equal(dst, sdata->vif.addr))
408
409 return ERR_PTR(-ENOTSUPP);
410
411 if (is_multicast_ether_addr(dst))
412 return ERR_PTR(-ENOTSUPP);
413
414 if (atomic_add_unless(&sdata->u.mesh.mpaths, 1, MESH_MAX_MPATHS) == 0)
415 return ERR_PTR(-ENOSPC);
416
417 new_mpath = mesh_path_new(sdata, dst, GFP_ATOMIC);
418 if (!new_mpath)
419 return ERR_PTR(-ENOMEM);
420
421 tbl = sdata->u.mesh.mesh_paths;
422 spin_lock_bh(&tbl->walk_lock);
423 mpath = rhashtable_lookup_get_insert_fast(&tbl->rhead,
424 &new_mpath->rhash,
425 mesh_rht_params);
426 if (!mpath)
427 hlist_add_head(&new_mpath->walk_list, &tbl->walk_head);
428 spin_unlock_bh(&tbl->walk_lock);
429
430 if (mpath) {
431 kfree(new_mpath);
432
433 if (IS_ERR(mpath))
434 return mpath;
435
436 new_mpath = mpath;
437 }
438
439 sdata->u.mesh.mesh_paths_generation++;
440 return new_mpath;
441}
442
443int mpp_path_add(struct ieee80211_sub_if_data *sdata,
444 const u8 *dst, const u8 *mpp)
445{
446 struct mesh_table *tbl;
447 struct mesh_path *new_mpath;
448 int ret;
449
450 if (ether_addr_equal(dst, sdata->vif.addr))
451
452 return -ENOTSUPP;
453
454 if (is_multicast_ether_addr(dst))
455 return -ENOTSUPP;
456
457 new_mpath = mesh_path_new(sdata, dst, GFP_ATOMIC);
458
459 if (!new_mpath)
460 return -ENOMEM;
461
462 memcpy(new_mpath->mpp, mpp, ETH_ALEN);
463 tbl = sdata->u.mesh.mpp_paths;
464
465 spin_lock_bh(&tbl->walk_lock);
466 ret = rhashtable_lookup_insert_fast(&tbl->rhead,
467 &new_mpath->rhash,
468 mesh_rht_params);
469 if (!ret)
470 hlist_add_head_rcu(&new_mpath->walk_list, &tbl->walk_head);
471 spin_unlock_bh(&tbl->walk_lock);
472
473 if (ret)
474 kfree(new_mpath);
475
476 sdata->u.mesh.mpp_paths_generation++;
477 return ret;
478}
479
480
481
482
483
484
485
486
487
488
489void mesh_plink_broken(struct sta_info *sta)
490{
491 struct ieee80211_sub_if_data *sdata = sta->sdata;
492 struct mesh_table *tbl = sdata->u.mesh.mesh_paths;
493 static const u8 bcast[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
494 struct mesh_path *mpath;
495
496 rcu_read_lock();
497 hlist_for_each_entry_rcu(mpath, &tbl->walk_head, walk_list) {
498 if (rcu_access_pointer(mpath->next_hop) == sta &&
499 mpath->flags & MESH_PATH_ACTIVE &&
500 !(mpath->flags & MESH_PATH_FIXED)) {
501 spin_lock_bh(&mpath->state_lock);
502 mpath->flags &= ~MESH_PATH_ACTIVE;
503 ++mpath->sn;
504 spin_unlock_bh(&mpath->state_lock);
505 mesh_path_error_tx(sdata,
506 sdata->u.mesh.mshcfg.element_ttl,
507 mpath->dst, mpath->sn,
508 WLAN_REASON_MESH_PATH_DEST_UNREACHABLE, bcast);
509 }
510 }
511 rcu_read_unlock();
512}
513
514static void mesh_path_free_rcu(struct mesh_table *tbl,
515 struct mesh_path *mpath)
516{
517 struct ieee80211_sub_if_data *sdata = mpath->sdata;
518
519 spin_lock_bh(&mpath->state_lock);
520 mpath->flags |= MESH_PATH_RESOLVING | MESH_PATH_DELETED;
521 mesh_gate_del(tbl, mpath);
522 spin_unlock_bh(&mpath->state_lock);
523 del_timer_sync(&mpath->timer);
524 atomic_dec(&sdata->u.mesh.mpaths);
525 atomic_dec(&tbl->entries);
526 mesh_path_flush_pending(mpath);
527 kfree_rcu(mpath, rcu);
528}
529
530static void __mesh_path_del(struct mesh_table *tbl, struct mesh_path *mpath)
531{
532 hlist_del_rcu(&mpath->walk_list);
533 rhashtable_remove_fast(&tbl->rhead, &mpath->rhash, mesh_rht_params);
534 mesh_path_free_rcu(tbl, mpath);
535}
536
537
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540
541
542
543
544
545
546
547
548void mesh_path_flush_by_nexthop(struct sta_info *sta)
549{
550 struct ieee80211_sub_if_data *sdata = sta->sdata;
551 struct mesh_table *tbl = sdata->u.mesh.mesh_paths;
552 struct mesh_path *mpath;
553 struct hlist_node *n;
554
555 spin_lock_bh(&tbl->walk_lock);
556 hlist_for_each_entry_safe(mpath, n, &tbl->walk_head, walk_list) {
557 if (rcu_access_pointer(mpath->next_hop) == sta)
558 __mesh_path_del(tbl, mpath);
559 }
560 spin_unlock_bh(&tbl->walk_lock);
561}
562
563static void mpp_flush_by_proxy(struct ieee80211_sub_if_data *sdata,
564 const u8 *proxy)
565{
566 struct mesh_table *tbl = sdata->u.mesh.mpp_paths;
567 struct mesh_path *mpath;
568 struct hlist_node *n;
569
570 spin_lock_bh(&tbl->walk_lock);
571 hlist_for_each_entry_safe(mpath, n, &tbl->walk_head, walk_list) {
572 if (ether_addr_equal(mpath->mpp, proxy))
573 __mesh_path_del(tbl, mpath);
574 }
575 spin_unlock_bh(&tbl->walk_lock);
576}
577
578static void table_flush_by_iface(struct mesh_table *tbl)
579{
580 struct mesh_path *mpath;
581 struct hlist_node *n;
582
583 spin_lock_bh(&tbl->walk_lock);
584 hlist_for_each_entry_safe(mpath, n, &tbl->walk_head, walk_list) {
585 __mesh_path_del(tbl, mpath);
586 }
587 spin_unlock_bh(&tbl->walk_lock);
588}
589
590
591
592
593
594
595
596
597
598void mesh_path_flush_by_iface(struct ieee80211_sub_if_data *sdata)
599{
600 table_flush_by_iface(sdata->u.mesh.mesh_paths);
601 table_flush_by_iface(sdata->u.mesh.mpp_paths);
602}
603
604
605
606
607
608
609
610
611
612
613static int table_path_del(struct mesh_table *tbl,
614 struct ieee80211_sub_if_data *sdata,
615 const u8 *addr)
616{
617 struct mesh_path *mpath;
618
619 spin_lock_bh(&tbl->walk_lock);
620 mpath = rhashtable_lookup_fast(&tbl->rhead, addr, mesh_rht_params);
621 if (!mpath) {
622 spin_unlock_bh(&tbl->walk_lock);
623 return -ENXIO;
624 }
625
626 __mesh_path_del(tbl, mpath);
627 spin_unlock_bh(&tbl->walk_lock);
628 return 0;
629}
630
631
632
633
634
635
636
637
638
639
640int mesh_path_del(struct ieee80211_sub_if_data *sdata, const u8 *addr)
641{
642 int err;
643
644
645 mpp_flush_by_proxy(sdata, addr);
646
647 err = table_path_del(sdata->u.mesh.mesh_paths, sdata, addr);
648 sdata->u.mesh.mesh_paths_generation++;
649 return err;
650}
651
652
653
654
655
656
657
658
659
660void mesh_path_tx_pending(struct mesh_path *mpath)
661{
662 if (mpath->flags & MESH_PATH_ACTIVE)
663 ieee80211_add_pending_skbs(mpath->sdata->local,
664 &mpath->frame_queue);
665}
666
667
668
669
670
671
672
673
674
675
676
677int mesh_path_send_to_gates(struct mesh_path *mpath)
678{
679 struct ieee80211_sub_if_data *sdata = mpath->sdata;
680 struct mesh_table *tbl;
681 struct mesh_path *from_mpath = mpath;
682 struct mesh_path *gate;
683 bool copy = false;
684
685 tbl = sdata->u.mesh.mesh_paths;
686
687 rcu_read_lock();
688 hlist_for_each_entry_rcu(gate, &tbl->known_gates, gate_list) {
689 if (gate->flags & MESH_PATH_ACTIVE) {
690 mpath_dbg(sdata, "Forwarding to %pM\n", gate->dst);
691 mesh_path_move_to_queue(gate, from_mpath, copy);
692 from_mpath = gate;
693 copy = true;
694 } else {
695 mpath_dbg(sdata,
696 "Not forwarding to %pM (flags %#x)\n",
697 gate->dst, gate->flags);
698 }
699 }
700
701 hlist_for_each_entry_rcu(gate, &tbl->known_gates, gate_list) {
702 mpath_dbg(sdata, "Sending to %pM\n", gate->dst);
703 mesh_path_tx_pending(gate);
704 }
705 rcu_read_unlock();
706
707 return (from_mpath == mpath) ? -EHOSTUNREACH : 0;
708}
709
710
711
712
713
714
715
716
717
718void mesh_path_discard_frame(struct ieee80211_sub_if_data *sdata,
719 struct sk_buff *skb)
720{
721 kfree_skb(skb);
722 sdata->u.mesh.mshstats.dropped_frames_no_route++;
723}
724
725
726
727
728
729
730
731
732void mesh_path_flush_pending(struct mesh_path *mpath)
733{
734 struct sk_buff *skb;
735
736 while ((skb = skb_dequeue(&mpath->frame_queue)) != NULL)
737 mesh_path_discard_frame(mpath->sdata, skb);
738}
739
740
741
742
743
744
745
746
747
748void mesh_path_fix_nexthop(struct mesh_path *mpath, struct sta_info *next_hop)
749{
750 spin_lock_bh(&mpath->state_lock);
751 mesh_path_assign_nexthop(mpath, next_hop);
752 mpath->sn = 0xffff;
753 mpath->metric = 0;
754 mpath->hop_count = 0;
755 mpath->exp_time = 0;
756 mpath->flags = MESH_PATH_FIXED | MESH_PATH_SN_VALID;
757 mesh_path_activate(mpath);
758 spin_unlock_bh(&mpath->state_lock);
759 ewma_mesh_fail_avg_init(&next_hop->mesh->fail_avg);
760
761 ewma_mesh_fail_avg_add(&next_hop->mesh->fail_avg, 1);
762 mesh_path_tx_pending(mpath);
763}
764
765int mesh_pathtbl_init(struct ieee80211_sub_if_data *sdata)
766{
767 struct mesh_table *tbl_path, *tbl_mpp;
768 int ret;
769
770 tbl_path = mesh_table_alloc();
771 if (!tbl_path)
772 return -ENOMEM;
773
774 tbl_mpp = mesh_table_alloc();
775 if (!tbl_mpp) {
776 ret = -ENOMEM;
777 goto free_path;
778 }
779
780 sdata->u.mesh.mesh_paths = tbl_path;
781 sdata->u.mesh.mpp_paths = tbl_mpp;
782
783 return 0;
784
785free_path:
786 mesh_table_free(tbl_path);
787 return ret;
788}
789
790static
791void mesh_path_tbl_expire(struct ieee80211_sub_if_data *sdata,
792 struct mesh_table *tbl)
793{
794 struct mesh_path *mpath;
795 struct hlist_node *n;
796
797 spin_lock_bh(&tbl->walk_lock);
798 hlist_for_each_entry_safe(mpath, n, &tbl->walk_head, walk_list) {
799 if ((!(mpath->flags & MESH_PATH_RESOLVING)) &&
800 (!(mpath->flags & MESH_PATH_FIXED)) &&
801 time_after(jiffies, mpath->exp_time + MESH_PATH_EXPIRE))
802 __mesh_path_del(tbl, mpath);
803 }
804 spin_unlock_bh(&tbl->walk_lock);
805}
806
807void mesh_path_expire(struct ieee80211_sub_if_data *sdata)
808{
809 mesh_path_tbl_expire(sdata, sdata->u.mesh.mesh_paths);
810 mesh_path_tbl_expire(sdata, sdata->u.mesh.mpp_paths);
811}
812
813void mesh_pathtbl_unregister(struct ieee80211_sub_if_data *sdata)
814{
815 mesh_table_free(sdata->u.mesh.mesh_paths);
816 mesh_table_free(sdata->u.mesh.mpp_paths);
817}
818