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45
46#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
47
48#include <linux/kernel.h>
49#include <linux/export.h>
50#include <linux/slab.h>
51#include <linux/list.h>
52#include <linux/ctype.h>
53#include <linux/nl80211.h>
54#include <linux/platform_device.h>
55#include <linux/moduleparam.h>
56#include <net/cfg80211.h>
57#include "core.h"
58#include "reg.h"
59#include "rdev-ops.h"
60#include "regdb.h"
61#include "nl80211.h"
62
63
64
65
66
67#define REG_ENFORCE_GRACE_MS 60000
68
69
70
71
72
73
74
75
76
77
78
79enum reg_request_treatment {
80 REG_REQ_OK,
81 REG_REQ_IGNORE,
82 REG_REQ_INTERSECT,
83 REG_REQ_ALREADY_SET,
84};
85
86static struct regulatory_request core_request_world = {
87 .initiator = NL80211_REGDOM_SET_BY_CORE,
88 .alpha2[0] = '0',
89 .alpha2[1] = '0',
90 .intersect = false,
91 .processed = true,
92 .country_ie_env = ENVIRON_ANY,
93};
94
95
96
97
98
99static struct regulatory_request __rcu *last_request =
100 (void __force __rcu *)&core_request_world;
101
102
103static struct platform_device *reg_pdev;
104
105
106
107
108
109
110
111const struct ieee80211_regdomain __rcu *cfg80211_regdomain;
112
113
114
115
116
117
118static int reg_num_devs_support_basehint;
119
120
121
122
123
124
125static bool reg_is_indoor;
126static spinlock_t reg_indoor_lock;
127
128
129static u32 reg_is_indoor_portid;
130
131static void restore_regulatory_settings(bool reset_user);
132
133static const struct ieee80211_regdomain *get_cfg80211_regdom(void)
134{
135 return rtnl_dereference(cfg80211_regdomain);
136}
137
138const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy)
139{
140 return rtnl_dereference(wiphy->regd);
141}
142
143static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region)
144{
145 switch (dfs_region) {
146 case NL80211_DFS_UNSET:
147 return "unset";
148 case NL80211_DFS_FCC:
149 return "FCC";
150 case NL80211_DFS_ETSI:
151 return "ETSI";
152 case NL80211_DFS_JP:
153 return "JP";
154 }
155 return "Unknown";
156}
157
158enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy)
159{
160 const struct ieee80211_regdomain *regd = NULL;
161 const struct ieee80211_regdomain *wiphy_regd = NULL;
162
163 regd = get_cfg80211_regdom();
164 if (!wiphy)
165 goto out;
166
167 wiphy_regd = get_wiphy_regdom(wiphy);
168 if (!wiphy_regd)
169 goto out;
170
171 if (wiphy_regd->dfs_region == regd->dfs_region)
172 goto out;
173
174 pr_debug("%s: device specific dfs_region (%s) disagrees with cfg80211's central dfs_region (%s)\n",
175 dev_name(&wiphy->dev),
176 reg_dfs_region_str(wiphy_regd->dfs_region),
177 reg_dfs_region_str(regd->dfs_region));
178
179out:
180 return regd->dfs_region;
181}
182
183static void rcu_free_regdom(const struct ieee80211_regdomain *r)
184{
185 if (!r)
186 return;
187 kfree_rcu((struct ieee80211_regdomain *)r, rcu_head);
188}
189
190static struct regulatory_request *get_last_request(void)
191{
192 return rcu_dereference_rtnl(last_request);
193}
194
195
196static LIST_HEAD(reg_requests_list);
197static spinlock_t reg_requests_lock;
198
199
200static LIST_HEAD(reg_pending_beacons);
201static spinlock_t reg_pending_beacons_lock;
202
203
204static LIST_HEAD(reg_beacon_list);
205
206struct reg_beacon {
207 struct list_head list;
208 struct ieee80211_channel chan;
209};
210
211static void reg_check_chans_work(struct work_struct *work);
212static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work);
213
214static void reg_todo(struct work_struct *work);
215static DECLARE_WORK(reg_work, reg_todo);
216
217
218static const struct ieee80211_regdomain world_regdom = {
219 .n_reg_rules = 8,
220 .alpha2 = "00",
221 .reg_rules = {
222
223 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
224
225 REG_RULE(2467-10, 2472+10, 20, 6, 20,
226 NL80211_RRF_NO_IR | NL80211_RRF_AUTO_BW),
227
228
229 REG_RULE(2484-10, 2484+10, 20, 6, 20,
230 NL80211_RRF_NO_IR |
231 NL80211_RRF_NO_OFDM),
232
233 REG_RULE(5180-10, 5240+10, 80, 6, 20,
234 NL80211_RRF_NO_IR |
235 NL80211_RRF_AUTO_BW),
236
237
238 REG_RULE(5260-10, 5320+10, 80, 6, 20,
239 NL80211_RRF_NO_IR |
240 NL80211_RRF_AUTO_BW |
241 NL80211_RRF_DFS),
242
243
244 REG_RULE(5500-10, 5720+10, 160, 6, 20,
245 NL80211_RRF_NO_IR |
246 NL80211_RRF_DFS),
247
248
249 REG_RULE(5745-10, 5825+10, 80, 6, 20,
250 NL80211_RRF_NO_IR),
251
252
253 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
254 }
255};
256
257
258static const struct ieee80211_regdomain *cfg80211_world_regdom =
259 &world_regdom;
260
261static char *ieee80211_regdom = "00";
262static char user_alpha2[2];
263
264module_param(ieee80211_regdom, charp, 0444);
265MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
266
267static void reg_free_request(struct regulatory_request *request)
268{
269 if (request == &core_request_world)
270 return;
271
272 if (request != get_last_request())
273 kfree(request);
274}
275
276static void reg_free_last_request(void)
277{
278 struct regulatory_request *lr = get_last_request();
279
280 if (lr != &core_request_world && lr)
281 kfree_rcu(lr, rcu_head);
282}
283
284static void reg_update_last_request(struct regulatory_request *request)
285{
286 struct regulatory_request *lr;
287
288 lr = get_last_request();
289 if (lr == request)
290 return;
291
292 reg_free_last_request();
293 rcu_assign_pointer(last_request, request);
294}
295
296static void reset_regdomains(bool full_reset,
297 const struct ieee80211_regdomain *new_regdom)
298{
299 const struct ieee80211_regdomain *r;
300
301 ASSERT_RTNL();
302
303 r = get_cfg80211_regdom();
304
305
306 if (r == cfg80211_world_regdom)
307 r = NULL;
308 if (cfg80211_world_regdom == &world_regdom)
309 cfg80211_world_regdom = NULL;
310 if (r == &world_regdom)
311 r = NULL;
312
313 rcu_free_regdom(r);
314 rcu_free_regdom(cfg80211_world_regdom);
315
316 cfg80211_world_regdom = &world_regdom;
317 rcu_assign_pointer(cfg80211_regdomain, new_regdom);
318
319 if (!full_reset)
320 return;
321
322 reg_update_last_request(&core_request_world);
323}
324
325
326
327
328
329static void update_world_regdomain(const struct ieee80211_regdomain *rd)
330{
331 struct regulatory_request *lr;
332
333 lr = get_last_request();
334
335 WARN_ON(!lr);
336
337 reset_regdomains(false, rd);
338
339 cfg80211_world_regdom = rd;
340}
341
342bool is_world_regdom(const char *alpha2)
343{
344 if (!alpha2)
345 return false;
346 return alpha2[0] == '0' && alpha2[1] == '0';
347}
348
349static bool is_alpha2_set(const char *alpha2)
350{
351 if (!alpha2)
352 return false;
353 return alpha2[0] && alpha2[1];
354}
355
356static bool is_unknown_alpha2(const char *alpha2)
357{
358 if (!alpha2)
359 return false;
360
361
362
363
364 return alpha2[0] == '9' && alpha2[1] == '9';
365}
366
367static bool is_intersected_alpha2(const char *alpha2)
368{
369 if (!alpha2)
370 return false;
371
372
373
374
375
376 return alpha2[0] == '9' && alpha2[1] == '8';
377}
378
379static bool is_an_alpha2(const char *alpha2)
380{
381 if (!alpha2)
382 return false;
383 return isalpha(alpha2[0]) && isalpha(alpha2[1]);
384}
385
386static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y)
387{
388 if (!alpha2_x || !alpha2_y)
389 return false;
390 return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1];
391}
392
393static bool regdom_changes(const char *alpha2)
394{
395 const struct ieee80211_regdomain *r = get_cfg80211_regdom();
396
397 if (!r)
398 return true;
399 return !alpha2_equal(r->alpha2, alpha2);
400}
401
402
403
404
405
406
407static bool is_user_regdom_saved(void)
408{
409 if (user_alpha2[0] == '9' && user_alpha2[1] == '7')
410 return false;
411
412
413 if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2),
414 "Unexpected user alpha2: %c%c\n",
415 user_alpha2[0], user_alpha2[1]))
416 return false;
417
418 return true;
419}
420
421static const struct ieee80211_regdomain *
422reg_copy_regd(const struct ieee80211_regdomain *src_regd)
423{
424 struct ieee80211_regdomain *regd;
425 int size_of_regd;
426 unsigned int i;
427
428 size_of_regd =
429 sizeof(struct ieee80211_regdomain) +
430 src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule);
431
432 regd = kzalloc(size_of_regd, GFP_KERNEL);
433 if (!regd)
434 return ERR_PTR(-ENOMEM);
435
436 memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain));
437
438 for (i = 0; i < src_regd->n_reg_rules; i++)
439 memcpy(®d->reg_rules[i], &src_regd->reg_rules[i],
440 sizeof(struct ieee80211_reg_rule));
441
442 return regd;
443}
444
445#ifdef CONFIG_CFG80211_INTERNAL_REGDB
446struct reg_regdb_apply_request {
447 struct list_head list;
448 const struct ieee80211_regdomain *regdom;
449};
450
451static LIST_HEAD(reg_regdb_apply_list);
452static DEFINE_MUTEX(reg_regdb_apply_mutex);
453
454static void reg_regdb_apply(struct work_struct *work)
455{
456 struct reg_regdb_apply_request *request;
457
458 rtnl_lock();
459
460 mutex_lock(®_regdb_apply_mutex);
461 while (!list_empty(®_regdb_apply_list)) {
462 request = list_first_entry(®_regdb_apply_list,
463 struct reg_regdb_apply_request,
464 list);
465 list_del(&request->list);
466
467 set_regdom(request->regdom, REGD_SOURCE_INTERNAL_DB);
468 kfree(request);
469 }
470 mutex_unlock(®_regdb_apply_mutex);
471
472 rtnl_unlock();
473}
474
475static DECLARE_WORK(reg_regdb_work, reg_regdb_apply);
476
477static int reg_query_builtin(const char *alpha2)
478{
479 const struct ieee80211_regdomain *regdom = NULL;
480 struct reg_regdb_apply_request *request;
481 unsigned int i;
482
483 for (i = 0; i < reg_regdb_size; i++) {
484 if (alpha2_equal(alpha2, reg_regdb[i]->alpha2)) {
485 regdom = reg_regdb[i];
486 break;
487 }
488 }
489
490 if (!regdom)
491 return -ENODATA;
492
493 request = kzalloc(sizeof(struct reg_regdb_apply_request), GFP_KERNEL);
494 if (!request)
495 return -ENOMEM;
496
497 request->regdom = reg_copy_regd(regdom);
498 if (IS_ERR_OR_NULL(request->regdom)) {
499 kfree(request);
500 return -ENOMEM;
501 }
502
503 mutex_lock(®_regdb_apply_mutex);
504 list_add_tail(&request->list, ®_regdb_apply_list);
505 mutex_unlock(®_regdb_apply_mutex);
506
507 schedule_work(®_regdb_work);
508
509 return 0;
510}
511
512
513static void reg_regdb_size_check(void)
514{
515
516 WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it...");
517}
518#else
519static inline void reg_regdb_size_check(void) {}
520static inline int reg_query_builtin(const char *alpha2)
521{
522 return -ENODATA;
523}
524#endif
525
526#ifdef CONFIG_CFG80211_CRDA_SUPPORT
527
528#define REG_MAX_CRDA_TIMEOUTS 10
529
530static u32 reg_crda_timeouts;
531
532static void crda_timeout_work(struct work_struct *work);
533static DECLARE_DELAYED_WORK(crda_timeout, crda_timeout_work);
534
535static void crda_timeout_work(struct work_struct *work)
536{
537 pr_debug("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
538 rtnl_lock();
539 reg_crda_timeouts++;
540 restore_regulatory_settings(true);
541 rtnl_unlock();
542}
543
544static void cancel_crda_timeout(void)
545{
546 cancel_delayed_work(&crda_timeout);
547}
548
549static void cancel_crda_timeout_sync(void)
550{
551 cancel_delayed_work_sync(&crda_timeout);
552}
553
554static void reset_crda_timeouts(void)
555{
556 reg_crda_timeouts = 0;
557}
558
559
560
561
562
563static int call_crda(const char *alpha2)
564{
565 char country[12];
566 char *env[] = { country, NULL };
567 int ret;
568
569 snprintf(country, sizeof(country), "COUNTRY=%c%c",
570 alpha2[0], alpha2[1]);
571
572 if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) {
573 pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n");
574 return -EINVAL;
575 }
576
577 if (!is_world_regdom((char *) alpha2))
578 pr_debug("Calling CRDA for country: %c%c\n",
579 alpha2[0], alpha2[1]);
580 else
581 pr_debug("Calling CRDA to update world regulatory domain\n");
582
583 ret = kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env);
584 if (ret)
585 return ret;
586
587 queue_delayed_work(system_power_efficient_wq,
588 &crda_timeout, msecs_to_jiffies(3142));
589 return 0;
590}
591#else
592static inline void cancel_crda_timeout(void) {}
593static inline void cancel_crda_timeout_sync(void) {}
594static inline void reset_crda_timeouts(void) {}
595static inline int call_crda(const char *alpha2)
596{
597 return -ENODATA;
598}
599#endif
600
601static bool reg_query_database(struct regulatory_request *request)
602{
603
604 if (reg_query_builtin(request->alpha2) == 0)
605 return true;
606
607 if (call_crda(request->alpha2) == 0)
608 return true;
609
610 return false;
611}
612
613bool reg_is_valid_request(const char *alpha2)
614{
615 struct regulatory_request *lr = get_last_request();
616
617 if (!lr || lr->processed)
618 return false;
619
620 return alpha2_equal(lr->alpha2, alpha2);
621}
622
623static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy)
624{
625 struct regulatory_request *lr = get_last_request();
626
627
628
629
630
631 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
632 lr->initiator != NL80211_REGDOM_SET_BY_USER &&
633 wiphy->regd)
634 return get_wiphy_regdom(wiphy);
635
636 return get_cfg80211_regdom();
637}
638
639static unsigned int
640reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd,
641 const struct ieee80211_reg_rule *rule)
642{
643 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
644 const struct ieee80211_freq_range *freq_range_tmp;
645 const struct ieee80211_reg_rule *tmp;
646 u32 start_freq, end_freq, idx, no;
647
648 for (idx = 0; idx < rd->n_reg_rules; idx++)
649 if (rule == &rd->reg_rules[idx])
650 break;
651
652 if (idx == rd->n_reg_rules)
653 return 0;
654
655
656 no = idx;
657
658 while (no) {
659 tmp = &rd->reg_rules[--no];
660 freq_range_tmp = &tmp->freq_range;
661
662 if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz)
663 break;
664
665 freq_range = freq_range_tmp;
666 }
667
668 start_freq = freq_range->start_freq_khz;
669
670
671 freq_range = &rule->freq_range;
672 no = idx;
673
674 while (no < rd->n_reg_rules - 1) {
675 tmp = &rd->reg_rules[++no];
676 freq_range_tmp = &tmp->freq_range;
677
678 if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz)
679 break;
680
681 freq_range = freq_range_tmp;
682 }
683
684 end_freq = freq_range->end_freq_khz;
685
686 return end_freq - start_freq;
687}
688
689unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd,
690 const struct ieee80211_reg_rule *rule)
691{
692 unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule);
693
694 if (rule->flags & NL80211_RRF_NO_160MHZ)
695 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80));
696 if (rule->flags & NL80211_RRF_NO_80MHZ)
697 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40));
698
699
700
701
702
703 if (rule->flags & NL80211_RRF_NO_HT40MINUS &&
704 rule->flags & NL80211_RRF_NO_HT40PLUS)
705 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20));
706
707 return bw;
708}
709
710
711static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
712{
713 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
714 u32 freq_diff;
715
716 if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0)
717 return false;
718
719 if (freq_range->start_freq_khz > freq_range->end_freq_khz)
720 return false;
721
722 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
723
724 if (freq_range->end_freq_khz <= freq_range->start_freq_khz ||
725 freq_range->max_bandwidth_khz > freq_diff)
726 return false;
727
728 return true;
729}
730
731static bool is_valid_rd(const struct ieee80211_regdomain *rd)
732{
733 const struct ieee80211_reg_rule *reg_rule = NULL;
734 unsigned int i;
735
736 if (!rd->n_reg_rules)
737 return false;
738
739 if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES))
740 return false;
741
742 for (i = 0; i < rd->n_reg_rules; i++) {
743 reg_rule = &rd->reg_rules[i];
744 if (!is_valid_reg_rule(reg_rule))
745 return false;
746 }
747
748 return true;
749}
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
767 u32 freq_khz)
768{
769#define ONE_GHZ_IN_KHZ 1000000
770
771
772
773
774
775 u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ?
776 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ;
777 if (abs(freq_khz - freq_range->start_freq_khz) <= limit)
778 return true;
779 if (abs(freq_khz - freq_range->end_freq_khz) <= limit)
780 return true;
781 return false;
782#undef ONE_GHZ_IN_KHZ
783}
784
785
786
787
788
789
790static enum nl80211_dfs_regions
791reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1,
792 const enum nl80211_dfs_regions dfs_region2)
793{
794 if (dfs_region1 != dfs_region2)
795 return NL80211_DFS_UNSET;
796 return dfs_region1;
797}
798
799
800
801
802
803static int reg_rules_intersect(const struct ieee80211_regdomain *rd1,
804 const struct ieee80211_regdomain *rd2,
805 const struct ieee80211_reg_rule *rule1,
806 const struct ieee80211_reg_rule *rule2,
807 struct ieee80211_reg_rule *intersected_rule)
808{
809 const struct ieee80211_freq_range *freq_range1, *freq_range2;
810 struct ieee80211_freq_range *freq_range;
811 const struct ieee80211_power_rule *power_rule1, *power_rule2;
812 struct ieee80211_power_rule *power_rule;
813 u32 freq_diff, max_bandwidth1, max_bandwidth2;
814
815 freq_range1 = &rule1->freq_range;
816 freq_range2 = &rule2->freq_range;
817 freq_range = &intersected_rule->freq_range;
818
819 power_rule1 = &rule1->power_rule;
820 power_rule2 = &rule2->power_rule;
821 power_rule = &intersected_rule->power_rule;
822
823 freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
824 freq_range2->start_freq_khz);
825 freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
826 freq_range2->end_freq_khz);
827
828 max_bandwidth1 = freq_range1->max_bandwidth_khz;
829 max_bandwidth2 = freq_range2->max_bandwidth_khz;
830
831 if (rule1->flags & NL80211_RRF_AUTO_BW)
832 max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1);
833 if (rule2->flags & NL80211_RRF_AUTO_BW)
834 max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2);
835
836 freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2);
837
838 intersected_rule->flags = rule1->flags | rule2->flags;
839
840
841
842
843
844
845
846
847
848 if ((rule1->flags & NL80211_RRF_AUTO_BW) &&
849 (rule2->flags & NL80211_RRF_AUTO_BW))
850 intersected_rule->flags |= NL80211_RRF_AUTO_BW;
851 else
852 intersected_rule->flags &= ~NL80211_RRF_AUTO_BW;
853
854 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
855 if (freq_range->max_bandwidth_khz > freq_diff)
856 freq_range->max_bandwidth_khz = freq_diff;
857
858 power_rule->max_eirp = min(power_rule1->max_eirp,
859 power_rule2->max_eirp);
860 power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
861 power_rule2->max_antenna_gain);
862
863 intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms,
864 rule2->dfs_cac_ms);
865
866 if (!is_valid_reg_rule(intersected_rule))
867 return -EINVAL;
868
869 return 0;
870}
871
872
873static bool rule_contains(struct ieee80211_reg_rule *r1,
874 struct ieee80211_reg_rule *r2)
875{
876
877 if (r1->flags != r2->flags)
878 return false;
879
880
881 if ((r1->power_rule.max_antenna_gain >
882 r2->power_rule.max_antenna_gain) ||
883 r1->power_rule.max_eirp > r2->power_rule.max_eirp)
884 return false;
885
886
887 if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz ||
888 r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz)
889 return false;
890
891
892 if (r1->freq_range.max_bandwidth_khz <
893 r2->freq_range.max_bandwidth_khz)
894 return false;
895
896 return true;
897}
898
899
900static void add_rule(struct ieee80211_reg_rule *rule,
901 struct ieee80211_reg_rule *reg_rules, u32 *n_rules)
902{
903 struct ieee80211_reg_rule *tmp_rule;
904 int i;
905
906 for (i = 0; i < *n_rules; i++) {
907 tmp_rule = ®_rules[i];
908
909 if (rule_contains(tmp_rule, rule))
910 return;
911
912
913 if (rule_contains(rule, tmp_rule)) {
914 memcpy(tmp_rule, rule, sizeof(*rule));
915 return;
916 }
917 }
918
919 memcpy(®_rules[*n_rules], rule, sizeof(*rule));
920 (*n_rules)++;
921}
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936static struct ieee80211_regdomain *
937regdom_intersect(const struct ieee80211_regdomain *rd1,
938 const struct ieee80211_regdomain *rd2)
939{
940 int r, size_of_regd;
941 unsigned int x, y;
942 unsigned int num_rules = 0;
943 const struct ieee80211_reg_rule *rule1, *rule2;
944 struct ieee80211_reg_rule intersected_rule;
945 struct ieee80211_regdomain *rd;
946
947 if (!rd1 || !rd2)
948 return NULL;
949
950
951
952
953
954
955
956
957
958 for (x = 0; x < rd1->n_reg_rules; x++) {
959 rule1 = &rd1->reg_rules[x];
960 for (y = 0; y < rd2->n_reg_rules; y++) {
961 rule2 = &rd2->reg_rules[y];
962 if (!reg_rules_intersect(rd1, rd2, rule1, rule2,
963 &intersected_rule))
964 num_rules++;
965 }
966 }
967
968 if (!num_rules)
969 return NULL;
970
971 size_of_regd = sizeof(struct ieee80211_regdomain) +
972 num_rules * sizeof(struct ieee80211_reg_rule);
973
974 rd = kzalloc(size_of_regd, GFP_KERNEL);
975 if (!rd)
976 return NULL;
977
978 for (x = 0; x < rd1->n_reg_rules; x++) {
979 rule1 = &rd1->reg_rules[x];
980 for (y = 0; y < rd2->n_reg_rules; y++) {
981 rule2 = &rd2->reg_rules[y];
982 r = reg_rules_intersect(rd1, rd2, rule1, rule2,
983 &intersected_rule);
984
985
986
987
988 if (r)
989 continue;
990
991 add_rule(&intersected_rule, rd->reg_rules,
992 &rd->n_reg_rules);
993 }
994 }
995
996 rd->alpha2[0] = '9';
997 rd->alpha2[1] = '8';
998 rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region,
999 rd2->dfs_region);
1000
1001 return rd;
1002}
1003
1004
1005
1006
1007
1008static u32 map_regdom_flags(u32 rd_flags)
1009{
1010 u32 channel_flags = 0;
1011 if (rd_flags & NL80211_RRF_NO_IR_ALL)
1012 channel_flags |= IEEE80211_CHAN_NO_IR;
1013 if (rd_flags & NL80211_RRF_DFS)
1014 channel_flags |= IEEE80211_CHAN_RADAR;
1015 if (rd_flags & NL80211_RRF_NO_OFDM)
1016 channel_flags |= IEEE80211_CHAN_NO_OFDM;
1017 if (rd_flags & NL80211_RRF_NO_OUTDOOR)
1018 channel_flags |= IEEE80211_CHAN_INDOOR_ONLY;
1019 if (rd_flags & NL80211_RRF_IR_CONCURRENT)
1020 channel_flags |= IEEE80211_CHAN_IR_CONCURRENT;
1021 if (rd_flags & NL80211_RRF_NO_HT40MINUS)
1022 channel_flags |= IEEE80211_CHAN_NO_HT40MINUS;
1023 if (rd_flags & NL80211_RRF_NO_HT40PLUS)
1024 channel_flags |= IEEE80211_CHAN_NO_HT40PLUS;
1025 if (rd_flags & NL80211_RRF_NO_80MHZ)
1026 channel_flags |= IEEE80211_CHAN_NO_80MHZ;
1027 if (rd_flags & NL80211_RRF_NO_160MHZ)
1028 channel_flags |= IEEE80211_CHAN_NO_160MHZ;
1029 return channel_flags;
1030}
1031
1032static const struct ieee80211_reg_rule *
1033freq_reg_info_regd(u32 center_freq,
1034 const struct ieee80211_regdomain *regd, u32 bw)
1035{
1036 int i;
1037 bool band_rule_found = false;
1038 bool bw_fits = false;
1039
1040 if (!regd)
1041 return ERR_PTR(-EINVAL);
1042
1043 for (i = 0; i < regd->n_reg_rules; i++) {
1044 const struct ieee80211_reg_rule *rr;
1045 const struct ieee80211_freq_range *fr = NULL;
1046
1047 rr = ®d->reg_rules[i];
1048 fr = &rr->freq_range;
1049
1050
1051
1052
1053
1054
1055 if (!band_rule_found)
1056 band_rule_found = freq_in_rule_band(fr, center_freq);
1057
1058 bw_fits = cfg80211_does_bw_fit_range(fr, center_freq, bw);
1059
1060 if (band_rule_found && bw_fits)
1061 return rr;
1062 }
1063
1064 if (!band_rule_found)
1065 return ERR_PTR(-ERANGE);
1066
1067 return ERR_PTR(-EINVAL);
1068}
1069
1070static const struct ieee80211_reg_rule *
1071__freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw)
1072{
1073 const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy);
1074 const struct ieee80211_reg_rule *reg_rule = NULL;
1075 u32 bw;
1076
1077 for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) {
1078 reg_rule = freq_reg_info_regd(center_freq, regd, bw);
1079 if (!IS_ERR(reg_rule))
1080 return reg_rule;
1081 }
1082
1083 return reg_rule;
1084}
1085
1086const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy,
1087 u32 center_freq)
1088{
1089 return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(20));
1090}
1091EXPORT_SYMBOL(freq_reg_info);
1092
1093const char *reg_initiator_name(enum nl80211_reg_initiator initiator)
1094{
1095 switch (initiator) {
1096 case NL80211_REGDOM_SET_BY_CORE:
1097 return "core";
1098 case NL80211_REGDOM_SET_BY_USER:
1099 return "user";
1100 case NL80211_REGDOM_SET_BY_DRIVER:
1101 return "driver";
1102 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
1103 return "country IE";
1104 default:
1105 WARN_ON(1);
1106 return "bug";
1107 }
1108}
1109EXPORT_SYMBOL(reg_initiator_name);
1110
1111static uint32_t reg_rule_to_chan_bw_flags(const struct ieee80211_regdomain *regd,
1112 const struct ieee80211_reg_rule *reg_rule,
1113 const struct ieee80211_channel *chan)
1114{
1115 const struct ieee80211_freq_range *freq_range = NULL;
1116 u32 max_bandwidth_khz, bw_flags = 0;
1117
1118 freq_range = ®_rule->freq_range;
1119
1120 max_bandwidth_khz = freq_range->max_bandwidth_khz;
1121
1122 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
1123 max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
1124
1125
1126 if (!cfg80211_does_bw_fit_range(freq_range,
1127 MHZ_TO_KHZ(chan->center_freq),
1128 MHZ_TO_KHZ(10)))
1129 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1130 if (!cfg80211_does_bw_fit_range(freq_range,
1131 MHZ_TO_KHZ(chan->center_freq),
1132 MHZ_TO_KHZ(20)))
1133 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1134
1135 if (max_bandwidth_khz < MHZ_TO_KHZ(10))
1136 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1137 if (max_bandwidth_khz < MHZ_TO_KHZ(20))
1138 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1139 if (max_bandwidth_khz < MHZ_TO_KHZ(40))
1140 bw_flags |= IEEE80211_CHAN_NO_HT40;
1141 if (max_bandwidth_khz < MHZ_TO_KHZ(80))
1142 bw_flags |= IEEE80211_CHAN_NO_80MHZ;
1143 if (max_bandwidth_khz < MHZ_TO_KHZ(160))
1144 bw_flags |= IEEE80211_CHAN_NO_160MHZ;
1145 return bw_flags;
1146}
1147
1148
1149
1150
1151
1152
1153static void handle_channel(struct wiphy *wiphy,
1154 enum nl80211_reg_initiator initiator,
1155 struct ieee80211_channel *chan)
1156{
1157 u32 flags, bw_flags = 0;
1158 const struct ieee80211_reg_rule *reg_rule = NULL;
1159 const struct ieee80211_power_rule *power_rule = NULL;
1160 struct wiphy *request_wiphy = NULL;
1161 struct regulatory_request *lr = get_last_request();
1162 const struct ieee80211_regdomain *regd;
1163
1164 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
1165
1166 flags = chan->orig_flags;
1167
1168 reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq));
1169 if (IS_ERR(reg_rule)) {
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1181 PTR_ERR(reg_rule) == -ERANGE)
1182 return;
1183
1184 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1185 request_wiphy && request_wiphy == wiphy &&
1186 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1187 pr_debug("Disabling freq %d MHz for good\n",
1188 chan->center_freq);
1189 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
1190 chan->flags = chan->orig_flags;
1191 } else {
1192 pr_debug("Disabling freq %d MHz\n",
1193 chan->center_freq);
1194 chan->flags |= IEEE80211_CHAN_DISABLED;
1195 }
1196 return;
1197 }
1198
1199 regd = reg_get_regdomain(wiphy);
1200
1201 power_rule = ®_rule->power_rule;
1202 bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
1203
1204 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1205 request_wiphy && request_wiphy == wiphy &&
1206 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1207
1208
1209
1210
1211
1212 chan->flags = chan->orig_flags =
1213 map_regdom_flags(reg_rule->flags) | bw_flags;
1214 chan->max_antenna_gain = chan->orig_mag =
1215 (int) MBI_TO_DBI(power_rule->max_antenna_gain);
1216 chan->max_reg_power = chan->max_power = chan->orig_mpwr =
1217 (int) MBM_TO_DBM(power_rule->max_eirp);
1218
1219 if (chan->flags & IEEE80211_CHAN_RADAR) {
1220 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1221 if (reg_rule->dfs_cac_ms)
1222 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1223 }
1224
1225 return;
1226 }
1227
1228 chan->dfs_state = NL80211_DFS_USABLE;
1229 chan->dfs_state_entered = jiffies;
1230
1231 chan->beacon_found = false;
1232 chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags);
1233 chan->max_antenna_gain =
1234 min_t(int, chan->orig_mag,
1235 MBI_TO_DBI(power_rule->max_antenna_gain));
1236 chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp);
1237
1238 if (chan->flags & IEEE80211_CHAN_RADAR) {
1239 if (reg_rule->dfs_cac_ms)
1240 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1241 else
1242 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1243 }
1244
1245 if (chan->orig_mpwr) {
1246
1247
1248
1249
1250 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1251 wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
1252 chan->max_power = chan->max_reg_power;
1253 else
1254 chan->max_power = min(chan->orig_mpwr,
1255 chan->max_reg_power);
1256 } else
1257 chan->max_power = chan->max_reg_power;
1258}
1259
1260static void handle_band(struct wiphy *wiphy,
1261 enum nl80211_reg_initiator initiator,
1262 struct ieee80211_supported_band *sband)
1263{
1264 unsigned int i;
1265
1266 if (!sband)
1267 return;
1268
1269 for (i = 0; i < sband->n_channels; i++)
1270 handle_channel(wiphy, initiator, &sband->channels[i]);
1271}
1272
1273static bool reg_request_cell_base(struct regulatory_request *request)
1274{
1275 if (request->initiator != NL80211_REGDOM_SET_BY_USER)
1276 return false;
1277 return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE;
1278}
1279
1280bool reg_last_request_cell_base(void)
1281{
1282 return reg_request_cell_base(get_last_request());
1283}
1284
1285#ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
1286
1287static enum reg_request_treatment
1288reg_ignore_cell_hint(struct regulatory_request *pending_request)
1289{
1290 struct regulatory_request *lr = get_last_request();
1291
1292 if (!reg_num_devs_support_basehint)
1293 return REG_REQ_IGNORE;
1294
1295 if (reg_request_cell_base(lr) &&
1296 !regdom_changes(pending_request->alpha2))
1297 return REG_REQ_ALREADY_SET;
1298
1299 return REG_REQ_OK;
1300}
1301
1302
1303static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
1304{
1305 return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS);
1306}
1307#else
1308static enum reg_request_treatment
1309reg_ignore_cell_hint(struct regulatory_request *pending_request)
1310{
1311 return REG_REQ_IGNORE;
1312}
1313
1314static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
1315{
1316 return true;
1317}
1318#endif
1319
1320static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy)
1321{
1322 if (wiphy->regulatory_flags & REGULATORY_STRICT_REG &&
1323 !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG))
1324 return true;
1325 return false;
1326}
1327
1328static bool ignore_reg_update(struct wiphy *wiphy,
1329 enum nl80211_reg_initiator initiator)
1330{
1331 struct regulatory_request *lr = get_last_request();
1332
1333 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
1334 return true;
1335
1336 if (!lr) {
1337 pr_debug("Ignoring regulatory request set by %s since last_request is not set\n",
1338 reg_initiator_name(initiator));
1339 return true;
1340 }
1341
1342 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
1343 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
1344 pr_debug("Ignoring regulatory request set by %s since the driver uses its own custom regulatory domain\n",
1345 reg_initiator_name(initiator));
1346 return true;
1347 }
1348
1349
1350
1351
1352
1353 if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd &&
1354 initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1355 !is_world_regdom(lr->alpha2)) {
1356 pr_debug("Ignoring regulatory request set by %s since the driver requires its own regulatory domain to be set first\n",
1357 reg_initiator_name(initiator));
1358 return true;
1359 }
1360
1361 if (reg_request_cell_base(lr))
1362 return reg_dev_ignore_cell_hint(wiphy);
1363
1364 return false;
1365}
1366
1367static bool reg_is_world_roaming(struct wiphy *wiphy)
1368{
1369 const struct ieee80211_regdomain *cr = get_cfg80211_regdom();
1370 const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy);
1371 struct regulatory_request *lr = get_last_request();
1372
1373 if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2)))
1374 return true;
1375
1376 if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1377 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
1378 return true;
1379
1380 return false;
1381}
1382
1383static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx,
1384 struct reg_beacon *reg_beacon)
1385{
1386 struct ieee80211_supported_band *sband;
1387 struct ieee80211_channel *chan;
1388 bool channel_changed = false;
1389 struct ieee80211_channel chan_before;
1390
1391 sband = wiphy->bands[reg_beacon->chan.band];
1392 chan = &sband->channels[chan_idx];
1393
1394 if (likely(chan->center_freq != reg_beacon->chan.center_freq))
1395 return;
1396
1397 if (chan->beacon_found)
1398 return;
1399
1400 chan->beacon_found = true;
1401
1402 if (!reg_is_world_roaming(wiphy))
1403 return;
1404
1405 if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS)
1406 return;
1407
1408 chan_before.center_freq = chan->center_freq;
1409 chan_before.flags = chan->flags;
1410
1411 if (chan->flags & IEEE80211_CHAN_NO_IR) {
1412 chan->flags &= ~IEEE80211_CHAN_NO_IR;
1413 channel_changed = true;
1414 }
1415
1416 if (channel_changed)
1417 nl80211_send_beacon_hint_event(wiphy, &chan_before, chan);
1418}
1419
1420
1421
1422
1423
1424static void wiphy_update_new_beacon(struct wiphy *wiphy,
1425 struct reg_beacon *reg_beacon)
1426{
1427 unsigned int i;
1428 struct ieee80211_supported_band *sband;
1429
1430 if (!wiphy->bands[reg_beacon->chan.band])
1431 return;
1432
1433 sband = wiphy->bands[reg_beacon->chan.band];
1434
1435 for (i = 0; i < sband->n_channels; i++)
1436 handle_reg_beacon(wiphy, i, reg_beacon);
1437}
1438
1439
1440
1441
1442static void wiphy_update_beacon_reg(struct wiphy *wiphy)
1443{
1444 unsigned int i;
1445 struct ieee80211_supported_band *sband;
1446 struct reg_beacon *reg_beacon;
1447
1448 list_for_each_entry(reg_beacon, ®_beacon_list, list) {
1449 if (!wiphy->bands[reg_beacon->chan.band])
1450 continue;
1451 sband = wiphy->bands[reg_beacon->chan.band];
1452 for (i = 0; i < sband->n_channels; i++)
1453 handle_reg_beacon(wiphy, i, reg_beacon);
1454 }
1455}
1456
1457
1458static void reg_process_beacons(struct wiphy *wiphy)
1459{
1460
1461
1462
1463
1464 if (!last_request)
1465 return;
1466 wiphy_update_beacon_reg(wiphy);
1467}
1468
1469static bool is_ht40_allowed(struct ieee80211_channel *chan)
1470{
1471 if (!chan)
1472 return false;
1473 if (chan->flags & IEEE80211_CHAN_DISABLED)
1474 return false;
1475
1476 if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40)
1477 return false;
1478 return true;
1479}
1480
1481static void reg_process_ht_flags_channel(struct wiphy *wiphy,
1482 struct ieee80211_channel *channel)
1483{
1484 struct ieee80211_supported_band *sband = wiphy->bands[channel->band];
1485 struct ieee80211_channel *channel_before = NULL, *channel_after = NULL;
1486 unsigned int i;
1487
1488 if (!is_ht40_allowed(channel)) {
1489 channel->flags |= IEEE80211_CHAN_NO_HT40;
1490 return;
1491 }
1492
1493
1494
1495
1496
1497 for (i = 0; i < sband->n_channels; i++) {
1498 struct ieee80211_channel *c = &sband->channels[i];
1499
1500 if (c->center_freq == (channel->center_freq - 20))
1501 channel_before = c;
1502 if (c->center_freq == (channel->center_freq + 20))
1503 channel_after = c;
1504 }
1505
1506
1507
1508
1509
1510
1511 if (!is_ht40_allowed(channel_before))
1512 channel->flags |= IEEE80211_CHAN_NO_HT40MINUS;
1513 else
1514 channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
1515
1516 if (!is_ht40_allowed(channel_after))
1517 channel->flags |= IEEE80211_CHAN_NO_HT40PLUS;
1518 else
1519 channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
1520}
1521
1522static void reg_process_ht_flags_band(struct wiphy *wiphy,
1523 struct ieee80211_supported_band *sband)
1524{
1525 unsigned int i;
1526
1527 if (!sband)
1528 return;
1529
1530 for (i = 0; i < sband->n_channels; i++)
1531 reg_process_ht_flags_channel(wiphy, &sband->channels[i]);
1532}
1533
1534static void reg_process_ht_flags(struct wiphy *wiphy)
1535{
1536 enum nl80211_band band;
1537
1538 if (!wiphy)
1539 return;
1540
1541 for (band = 0; band < NUM_NL80211_BANDS; band++)
1542 reg_process_ht_flags_band(wiphy, wiphy->bands[band]);
1543}
1544
1545static void reg_call_notifier(struct wiphy *wiphy,
1546 struct regulatory_request *request)
1547{
1548 if (wiphy->reg_notifier)
1549 wiphy->reg_notifier(wiphy, request);
1550}
1551
1552static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev)
1553{
1554 struct cfg80211_chan_def chandef;
1555 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1556 enum nl80211_iftype iftype;
1557
1558 wdev_lock(wdev);
1559 iftype = wdev->iftype;
1560
1561
1562 if (!wdev->netdev || !netif_running(wdev->netdev))
1563 goto wdev_inactive_unlock;
1564
1565 switch (iftype) {
1566 case NL80211_IFTYPE_AP:
1567 case NL80211_IFTYPE_P2P_GO:
1568 if (!wdev->beacon_interval)
1569 goto wdev_inactive_unlock;
1570 chandef = wdev->chandef;
1571 break;
1572 case NL80211_IFTYPE_ADHOC:
1573 if (!wdev->ssid_len)
1574 goto wdev_inactive_unlock;
1575 chandef = wdev->chandef;
1576 break;
1577 case NL80211_IFTYPE_STATION:
1578 case NL80211_IFTYPE_P2P_CLIENT:
1579 if (!wdev->current_bss ||
1580 !wdev->current_bss->pub.channel)
1581 goto wdev_inactive_unlock;
1582
1583 if (!rdev->ops->get_channel ||
1584 rdev_get_channel(rdev, wdev, &chandef))
1585 cfg80211_chandef_create(&chandef,
1586 wdev->current_bss->pub.channel,
1587 NL80211_CHAN_NO_HT);
1588 break;
1589 case NL80211_IFTYPE_MONITOR:
1590 case NL80211_IFTYPE_AP_VLAN:
1591 case NL80211_IFTYPE_P2P_DEVICE:
1592
1593 break;
1594 default:
1595
1596 WARN_ON(1);
1597 break;
1598 }
1599
1600 wdev_unlock(wdev);
1601
1602 switch (iftype) {
1603 case NL80211_IFTYPE_AP:
1604 case NL80211_IFTYPE_P2P_GO:
1605 case NL80211_IFTYPE_ADHOC:
1606 return cfg80211_reg_can_beacon_relax(wiphy, &chandef, iftype);
1607 case NL80211_IFTYPE_STATION:
1608 case NL80211_IFTYPE_P2P_CLIENT:
1609 return cfg80211_chandef_usable(wiphy, &chandef,
1610 IEEE80211_CHAN_DISABLED);
1611 default:
1612 break;
1613 }
1614
1615 return true;
1616
1617wdev_inactive_unlock:
1618 wdev_unlock(wdev);
1619 return true;
1620}
1621
1622static void reg_leave_invalid_chans(struct wiphy *wiphy)
1623{
1624 struct wireless_dev *wdev;
1625 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1626
1627 ASSERT_RTNL();
1628
1629 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
1630 if (!reg_wdev_chan_valid(wiphy, wdev))
1631 cfg80211_leave(rdev, wdev);
1632}
1633
1634static void reg_check_chans_work(struct work_struct *work)
1635{
1636 struct cfg80211_registered_device *rdev;
1637
1638 pr_debug("Verifying active interfaces after reg change\n");
1639 rtnl_lock();
1640
1641 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
1642 if (!(rdev->wiphy.regulatory_flags &
1643 REGULATORY_IGNORE_STALE_KICKOFF))
1644 reg_leave_invalid_chans(&rdev->wiphy);
1645
1646 rtnl_unlock();
1647}
1648
1649static void reg_check_channels(void)
1650{
1651
1652
1653
1654
1655 mod_delayed_work(system_power_efficient_wq,
1656 ®_check_chans,
1657 msecs_to_jiffies(REG_ENFORCE_GRACE_MS));
1658}
1659
1660static void wiphy_update_regulatory(struct wiphy *wiphy,
1661 enum nl80211_reg_initiator initiator)
1662{
1663 enum nl80211_band band;
1664 struct regulatory_request *lr = get_last_request();
1665
1666 if (ignore_reg_update(wiphy, initiator)) {
1667
1668
1669
1670
1671
1672 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
1673 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
1674 reg_call_notifier(wiphy, lr);
1675 return;
1676 }
1677
1678 lr->dfs_region = get_cfg80211_regdom()->dfs_region;
1679
1680 for (band = 0; band < NUM_NL80211_BANDS; band++)
1681 handle_band(wiphy, initiator, wiphy->bands[band]);
1682
1683 reg_process_beacons(wiphy);
1684 reg_process_ht_flags(wiphy);
1685 reg_call_notifier(wiphy, lr);
1686}
1687
1688static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
1689{
1690 struct cfg80211_registered_device *rdev;
1691 struct wiphy *wiphy;
1692
1693 ASSERT_RTNL();
1694
1695 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1696 wiphy = &rdev->wiphy;
1697 wiphy_update_regulatory(wiphy, initiator);
1698 }
1699
1700 reg_check_channels();
1701}
1702
1703static void handle_channel_custom(struct wiphy *wiphy,
1704 struct ieee80211_channel *chan,
1705 const struct ieee80211_regdomain *regd)
1706{
1707 u32 bw_flags = 0;
1708 const struct ieee80211_reg_rule *reg_rule = NULL;
1709 const struct ieee80211_power_rule *power_rule = NULL;
1710 u32 bw;
1711
1712 for (bw = MHZ_TO_KHZ(20); bw >= MHZ_TO_KHZ(5); bw = bw / 2) {
1713 reg_rule = freq_reg_info_regd(MHZ_TO_KHZ(chan->center_freq),
1714 regd, bw);
1715 if (!IS_ERR(reg_rule))
1716 break;
1717 }
1718
1719 if (IS_ERR(reg_rule)) {
1720 pr_debug("Disabling freq %d MHz as custom regd has no rule that fits it\n",
1721 chan->center_freq);
1722 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
1723 chan->flags |= IEEE80211_CHAN_DISABLED;
1724 } else {
1725 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
1726 chan->flags = chan->orig_flags;
1727 }
1728 return;
1729 }
1730
1731 power_rule = ®_rule->power_rule;
1732 bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
1733
1734 chan->dfs_state_entered = jiffies;
1735 chan->dfs_state = NL80211_DFS_USABLE;
1736
1737 chan->beacon_found = false;
1738
1739 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
1740 chan->flags = chan->orig_flags | bw_flags |
1741 map_regdom_flags(reg_rule->flags);
1742 else
1743 chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags;
1744
1745 chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);
1746 chan->max_reg_power = chan->max_power =
1747 (int) MBM_TO_DBM(power_rule->max_eirp);
1748
1749 if (chan->flags & IEEE80211_CHAN_RADAR) {
1750 if (reg_rule->dfs_cac_ms)
1751 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1752 else
1753 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1754 }
1755
1756 chan->max_power = chan->max_reg_power;
1757}
1758
1759static void handle_band_custom(struct wiphy *wiphy,
1760 struct ieee80211_supported_band *sband,
1761 const struct ieee80211_regdomain *regd)
1762{
1763 unsigned int i;
1764
1765 if (!sband)
1766 return;
1767
1768 for (i = 0; i < sband->n_channels; i++)
1769 handle_channel_custom(wiphy, &sband->channels[i], regd);
1770}
1771
1772
1773void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
1774 const struct ieee80211_regdomain *regd)
1775{
1776 enum nl80211_band band;
1777 unsigned int bands_set = 0;
1778
1779 WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG),
1780 "wiphy should have REGULATORY_CUSTOM_REG\n");
1781 wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
1782
1783 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1784 if (!wiphy->bands[band])
1785 continue;
1786 handle_band_custom(wiphy, wiphy->bands[band], regd);
1787 bands_set++;
1788 }
1789
1790
1791
1792
1793
1794 WARN_ON(!bands_set);
1795}
1796EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
1797
1798static void reg_set_request_processed(void)
1799{
1800 bool need_more_processing = false;
1801 struct regulatory_request *lr = get_last_request();
1802
1803 lr->processed = true;
1804
1805 spin_lock(®_requests_lock);
1806 if (!list_empty(®_requests_list))
1807 need_more_processing = true;
1808 spin_unlock(®_requests_lock);
1809
1810 cancel_crda_timeout();
1811
1812 if (need_more_processing)
1813 schedule_work(®_work);
1814}
1815
1816
1817
1818
1819
1820
1821
1822
1823static enum reg_request_treatment
1824reg_process_hint_core(struct regulatory_request *core_request)
1825{
1826 if (reg_query_database(core_request)) {
1827 core_request->intersect = false;
1828 core_request->processed = false;
1829 reg_update_last_request(core_request);
1830 return REG_REQ_OK;
1831 }
1832
1833 return REG_REQ_IGNORE;
1834}
1835
1836static enum reg_request_treatment
1837__reg_process_hint_user(struct regulatory_request *user_request)
1838{
1839 struct regulatory_request *lr = get_last_request();
1840
1841 if (reg_request_cell_base(user_request))
1842 return reg_ignore_cell_hint(user_request);
1843
1844 if (reg_request_cell_base(lr))
1845 return REG_REQ_IGNORE;
1846
1847 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
1848 return REG_REQ_INTERSECT;
1849
1850
1851
1852
1853 if (lr->initiator == NL80211_REGDOM_SET_BY_USER &&
1854 lr->intersect)
1855 return REG_REQ_IGNORE;
1856
1857
1858
1859
1860 if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE ||
1861 lr->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
1862 lr->initiator == NL80211_REGDOM_SET_BY_USER) &&
1863 regdom_changes(lr->alpha2))
1864 return REG_REQ_IGNORE;
1865
1866 if (!regdom_changes(user_request->alpha2))
1867 return REG_REQ_ALREADY_SET;
1868
1869 return REG_REQ_OK;
1870}
1871
1872
1873
1874
1875
1876
1877
1878
1879static enum reg_request_treatment
1880reg_process_hint_user(struct regulatory_request *user_request)
1881{
1882 enum reg_request_treatment treatment;
1883
1884 treatment = __reg_process_hint_user(user_request);
1885 if (treatment == REG_REQ_IGNORE ||
1886 treatment == REG_REQ_ALREADY_SET)
1887 return REG_REQ_IGNORE;
1888
1889 user_request->intersect = treatment == REG_REQ_INTERSECT;
1890 user_request->processed = false;
1891
1892 if (reg_query_database(user_request)) {
1893 reg_update_last_request(user_request);
1894 user_alpha2[0] = user_request->alpha2[0];
1895 user_alpha2[1] = user_request->alpha2[1];
1896 return REG_REQ_OK;
1897 }
1898
1899 return REG_REQ_IGNORE;
1900}
1901
1902static enum reg_request_treatment
1903__reg_process_hint_driver(struct regulatory_request *driver_request)
1904{
1905 struct regulatory_request *lr = get_last_request();
1906
1907 if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) {
1908 if (regdom_changes(driver_request->alpha2))
1909 return REG_REQ_OK;
1910 return REG_REQ_ALREADY_SET;
1911 }
1912
1913
1914
1915
1916
1917
1918 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1919 !regdom_changes(driver_request->alpha2))
1920 return REG_REQ_ALREADY_SET;
1921
1922 return REG_REQ_INTERSECT;
1923}
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934static enum reg_request_treatment
1935reg_process_hint_driver(struct wiphy *wiphy,
1936 struct regulatory_request *driver_request)
1937{
1938 const struct ieee80211_regdomain *regd, *tmp;
1939 enum reg_request_treatment treatment;
1940
1941 treatment = __reg_process_hint_driver(driver_request);
1942
1943 switch (treatment) {
1944 case REG_REQ_OK:
1945 break;
1946 case REG_REQ_IGNORE:
1947 return REG_REQ_IGNORE;
1948 case REG_REQ_INTERSECT:
1949 case REG_REQ_ALREADY_SET:
1950 regd = reg_copy_regd(get_cfg80211_regdom());
1951 if (IS_ERR(regd))
1952 return REG_REQ_IGNORE;
1953
1954 tmp = get_wiphy_regdom(wiphy);
1955 rcu_assign_pointer(wiphy->regd, regd);
1956 rcu_free_regdom(tmp);
1957 }
1958
1959
1960 driver_request->intersect = treatment == REG_REQ_INTERSECT;
1961 driver_request->processed = false;
1962
1963
1964
1965
1966
1967
1968 if (treatment == REG_REQ_ALREADY_SET) {
1969 nl80211_send_reg_change_event(driver_request);
1970 reg_update_last_request(driver_request);
1971 reg_set_request_processed();
1972 return REG_REQ_ALREADY_SET;
1973 }
1974
1975 if (reg_query_database(driver_request)) {
1976 reg_update_last_request(driver_request);
1977 return REG_REQ_OK;
1978 }
1979
1980 return REG_REQ_IGNORE;
1981}
1982
1983static enum reg_request_treatment
1984__reg_process_hint_country_ie(struct wiphy *wiphy,
1985 struct regulatory_request *country_ie_request)
1986{
1987 struct wiphy *last_wiphy = NULL;
1988 struct regulatory_request *lr = get_last_request();
1989
1990 if (reg_request_cell_base(lr)) {
1991
1992 if (regdom_changes(country_ie_request->alpha2))
1993 return REG_REQ_IGNORE;
1994 return REG_REQ_ALREADY_SET;
1995 } else {
1996 if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE)
1997 return REG_REQ_IGNORE;
1998 }
1999
2000 if (unlikely(!is_an_alpha2(country_ie_request->alpha2)))
2001 return -EINVAL;
2002
2003 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE)
2004 return REG_REQ_OK;
2005
2006 last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
2007
2008 if (last_wiphy != wiphy) {
2009
2010
2011
2012
2013
2014
2015 if (regdom_changes(country_ie_request->alpha2))
2016 return REG_REQ_IGNORE;
2017 return REG_REQ_ALREADY_SET;
2018 }
2019
2020 if (regdom_changes(country_ie_request->alpha2))
2021 return REG_REQ_OK;
2022 return REG_REQ_ALREADY_SET;
2023}
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034static enum reg_request_treatment
2035reg_process_hint_country_ie(struct wiphy *wiphy,
2036 struct regulatory_request *country_ie_request)
2037{
2038 enum reg_request_treatment treatment;
2039
2040 treatment = __reg_process_hint_country_ie(wiphy, country_ie_request);
2041
2042 switch (treatment) {
2043 case REG_REQ_OK:
2044 break;
2045 case REG_REQ_IGNORE:
2046 return REG_REQ_IGNORE;
2047 case REG_REQ_ALREADY_SET:
2048 reg_free_request(country_ie_request);
2049 return REG_REQ_ALREADY_SET;
2050 case REG_REQ_INTERSECT:
2051
2052
2053
2054
2055 WARN_ONCE(1, "Unexpected intersection for country IEs");
2056 return REG_REQ_IGNORE;
2057 }
2058
2059 country_ie_request->intersect = false;
2060 country_ie_request->processed = false;
2061
2062 if (reg_query_database(country_ie_request)) {
2063 reg_update_last_request(country_ie_request);
2064 return REG_REQ_OK;
2065 }
2066
2067 return REG_REQ_IGNORE;
2068}
2069
2070bool reg_dfs_domain_same(struct wiphy *wiphy1, struct wiphy *wiphy2)
2071{
2072 const struct ieee80211_regdomain *wiphy1_regd = NULL;
2073 const struct ieee80211_regdomain *wiphy2_regd = NULL;
2074 const struct ieee80211_regdomain *cfg80211_regd = NULL;
2075 bool dfs_domain_same;
2076
2077 rcu_read_lock();
2078
2079 cfg80211_regd = rcu_dereference(cfg80211_regdomain);
2080 wiphy1_regd = rcu_dereference(wiphy1->regd);
2081 if (!wiphy1_regd)
2082 wiphy1_regd = cfg80211_regd;
2083
2084 wiphy2_regd = rcu_dereference(wiphy2->regd);
2085 if (!wiphy2_regd)
2086 wiphy2_regd = cfg80211_regd;
2087
2088 dfs_domain_same = wiphy1_regd->dfs_region == wiphy2_regd->dfs_region;
2089
2090 rcu_read_unlock();
2091
2092 return dfs_domain_same;
2093}
2094
2095static void reg_copy_dfs_chan_state(struct ieee80211_channel *dst_chan,
2096 struct ieee80211_channel *src_chan)
2097{
2098 if (!(dst_chan->flags & IEEE80211_CHAN_RADAR) ||
2099 !(src_chan->flags & IEEE80211_CHAN_RADAR))
2100 return;
2101
2102 if (dst_chan->flags & IEEE80211_CHAN_DISABLED ||
2103 src_chan->flags & IEEE80211_CHAN_DISABLED)
2104 return;
2105
2106 if (src_chan->center_freq == dst_chan->center_freq &&
2107 dst_chan->dfs_state == NL80211_DFS_USABLE) {
2108 dst_chan->dfs_state = src_chan->dfs_state;
2109 dst_chan->dfs_state_entered = src_chan->dfs_state_entered;
2110 }
2111}
2112
2113static void wiphy_share_dfs_chan_state(struct wiphy *dst_wiphy,
2114 struct wiphy *src_wiphy)
2115{
2116 struct ieee80211_supported_band *src_sband, *dst_sband;
2117 struct ieee80211_channel *src_chan, *dst_chan;
2118 int i, j, band;
2119
2120 if (!reg_dfs_domain_same(dst_wiphy, src_wiphy))
2121 return;
2122
2123 for (band = 0; band < NUM_NL80211_BANDS; band++) {
2124 dst_sband = dst_wiphy->bands[band];
2125 src_sband = src_wiphy->bands[band];
2126 if (!dst_sband || !src_sband)
2127 continue;
2128
2129 for (i = 0; i < dst_sband->n_channels; i++) {
2130 dst_chan = &dst_sband->channels[i];
2131 for (j = 0; j < src_sband->n_channels; j++) {
2132 src_chan = &src_sband->channels[j];
2133 reg_copy_dfs_chan_state(dst_chan, src_chan);
2134 }
2135 }
2136 }
2137}
2138
2139static void wiphy_all_share_dfs_chan_state(struct wiphy *wiphy)
2140{
2141 struct cfg80211_registered_device *rdev;
2142
2143 ASSERT_RTNL();
2144
2145 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2146 if (wiphy == &rdev->wiphy)
2147 continue;
2148 wiphy_share_dfs_chan_state(wiphy, &rdev->wiphy);
2149 }
2150}
2151
2152
2153static void reg_process_hint(struct regulatory_request *reg_request)
2154{
2155 struct wiphy *wiphy = NULL;
2156 enum reg_request_treatment treatment;
2157
2158 if (reg_request->wiphy_idx != WIPHY_IDX_INVALID)
2159 wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
2160
2161 switch (reg_request->initiator) {
2162 case NL80211_REGDOM_SET_BY_CORE:
2163 treatment = reg_process_hint_core(reg_request);
2164 break;
2165 case NL80211_REGDOM_SET_BY_USER:
2166 treatment = reg_process_hint_user(reg_request);
2167 break;
2168 case NL80211_REGDOM_SET_BY_DRIVER:
2169 if (!wiphy)
2170 goto out_free;
2171 treatment = reg_process_hint_driver(wiphy, reg_request);
2172 break;
2173 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
2174 if (!wiphy)
2175 goto out_free;
2176 treatment = reg_process_hint_country_ie(wiphy, reg_request);
2177 break;
2178 default:
2179 WARN(1, "invalid initiator %d\n", reg_request->initiator);
2180 goto out_free;
2181 }
2182
2183 if (treatment == REG_REQ_IGNORE)
2184 goto out_free;
2185
2186 WARN(treatment != REG_REQ_OK && treatment != REG_REQ_ALREADY_SET,
2187 "unexpected treatment value %d\n", treatment);
2188
2189
2190
2191
2192 if (treatment == REG_REQ_ALREADY_SET && wiphy &&
2193 wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
2194 wiphy_update_regulatory(wiphy, reg_request->initiator);
2195 wiphy_all_share_dfs_chan_state(wiphy);
2196 reg_check_channels();
2197 }
2198
2199 return;
2200
2201out_free:
2202 reg_free_request(reg_request);
2203}
2204
2205static bool reg_only_self_managed_wiphys(void)
2206{
2207 struct cfg80211_registered_device *rdev;
2208 struct wiphy *wiphy;
2209 bool self_managed_found = false;
2210
2211 ASSERT_RTNL();
2212
2213 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2214 wiphy = &rdev->wiphy;
2215 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2216 self_managed_found = true;
2217 else
2218 return false;
2219 }
2220
2221
2222 return self_managed_found;
2223}
2224
2225
2226
2227
2228
2229
2230static void reg_process_pending_hints(void)
2231{
2232 struct regulatory_request *reg_request, *lr;
2233
2234 lr = get_last_request();
2235
2236
2237 if (lr && !lr->processed) {
2238 reg_process_hint(lr);
2239 return;
2240 }
2241
2242 spin_lock(®_requests_lock);
2243
2244 if (list_empty(®_requests_list)) {
2245 spin_unlock(®_requests_lock);
2246 return;
2247 }
2248
2249 reg_request = list_first_entry(®_requests_list,
2250 struct regulatory_request,
2251 list);
2252 list_del_init(®_request->list);
2253
2254 spin_unlock(®_requests_lock);
2255
2256 if (reg_only_self_managed_wiphys()) {
2257 reg_free_request(reg_request);
2258 return;
2259 }
2260
2261 reg_process_hint(reg_request);
2262
2263 lr = get_last_request();
2264
2265 spin_lock(®_requests_lock);
2266 if (!list_empty(®_requests_list) && lr && lr->processed)
2267 schedule_work(®_work);
2268 spin_unlock(®_requests_lock);
2269}
2270
2271
2272static void reg_process_pending_beacon_hints(void)
2273{
2274 struct cfg80211_registered_device *rdev;
2275 struct reg_beacon *pending_beacon, *tmp;
2276
2277
2278 spin_lock_bh(®_pending_beacons_lock);
2279
2280 list_for_each_entry_safe(pending_beacon, tmp,
2281 ®_pending_beacons, list) {
2282 list_del_init(&pending_beacon->list);
2283
2284
2285 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
2286 wiphy_update_new_beacon(&rdev->wiphy, pending_beacon);
2287
2288
2289 list_add_tail(&pending_beacon->list, ®_beacon_list);
2290 }
2291
2292 spin_unlock_bh(®_pending_beacons_lock);
2293}
2294
2295static void reg_process_self_managed_hints(void)
2296{
2297 struct cfg80211_registered_device *rdev;
2298 struct wiphy *wiphy;
2299 const struct ieee80211_regdomain *tmp;
2300 const struct ieee80211_regdomain *regd;
2301 enum nl80211_band band;
2302 struct regulatory_request request = {};
2303
2304 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2305 wiphy = &rdev->wiphy;
2306
2307 spin_lock(®_requests_lock);
2308 regd = rdev->requested_regd;
2309 rdev->requested_regd = NULL;
2310 spin_unlock(®_requests_lock);
2311
2312 if (regd == NULL)
2313 continue;
2314
2315 tmp = get_wiphy_regdom(wiphy);
2316 rcu_assign_pointer(wiphy->regd, regd);
2317 rcu_free_regdom(tmp);
2318
2319 for (band = 0; band < NUM_NL80211_BANDS; band++)
2320 handle_band_custom(wiphy, wiphy->bands[band], regd);
2321
2322 reg_process_ht_flags(wiphy);
2323
2324 request.wiphy_idx = get_wiphy_idx(wiphy);
2325 request.alpha2[0] = regd->alpha2[0];
2326 request.alpha2[1] = regd->alpha2[1];
2327 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
2328
2329 nl80211_send_wiphy_reg_change_event(&request);
2330 }
2331
2332 reg_check_channels();
2333}
2334
2335static void reg_todo(struct work_struct *work)
2336{
2337 rtnl_lock();
2338 reg_process_pending_hints();
2339 reg_process_pending_beacon_hints();
2340 reg_process_self_managed_hints();
2341 rtnl_unlock();
2342}
2343
2344static void queue_regulatory_request(struct regulatory_request *request)
2345{
2346 request->alpha2[0] = toupper(request->alpha2[0]);
2347 request->alpha2[1] = toupper(request->alpha2[1]);
2348
2349 spin_lock(®_requests_lock);
2350 list_add_tail(&request->list, ®_requests_list);
2351 spin_unlock(®_requests_lock);
2352
2353 schedule_work(®_work);
2354}
2355
2356
2357
2358
2359
2360static int regulatory_hint_core(const char *alpha2)
2361{
2362 struct regulatory_request *request;
2363
2364 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2365 if (!request)
2366 return -ENOMEM;
2367
2368 request->alpha2[0] = alpha2[0];
2369 request->alpha2[1] = alpha2[1];
2370 request->initiator = NL80211_REGDOM_SET_BY_CORE;
2371
2372 queue_regulatory_request(request);
2373
2374 return 0;
2375}
2376
2377
2378int regulatory_hint_user(const char *alpha2,
2379 enum nl80211_user_reg_hint_type user_reg_hint_type)
2380{
2381 struct regulatory_request *request;
2382
2383 if (WARN_ON(!alpha2))
2384 return -EINVAL;
2385
2386 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2387 if (!request)
2388 return -ENOMEM;
2389
2390 request->wiphy_idx = WIPHY_IDX_INVALID;
2391 request->alpha2[0] = alpha2[0];
2392 request->alpha2[1] = alpha2[1];
2393 request->initiator = NL80211_REGDOM_SET_BY_USER;
2394 request->user_reg_hint_type = user_reg_hint_type;
2395
2396
2397 reset_crda_timeouts();
2398
2399 queue_regulatory_request(request);
2400
2401 return 0;
2402}
2403
2404int regulatory_hint_indoor(bool is_indoor, u32 portid)
2405{
2406 spin_lock(®_indoor_lock);
2407
2408
2409
2410
2411
2412
2413
2414
2415 reg_is_indoor = is_indoor;
2416 if (reg_is_indoor) {
2417 if (!reg_is_indoor_portid)
2418 reg_is_indoor_portid = portid;
2419 } else {
2420 reg_is_indoor_portid = 0;
2421 }
2422
2423 spin_unlock(®_indoor_lock);
2424
2425 if (!is_indoor)
2426 reg_check_channels();
2427
2428 return 0;
2429}
2430
2431void regulatory_netlink_notify(u32 portid)
2432{
2433 spin_lock(®_indoor_lock);
2434
2435 if (reg_is_indoor_portid != portid) {
2436 spin_unlock(®_indoor_lock);
2437 return;
2438 }
2439
2440 reg_is_indoor = false;
2441 reg_is_indoor_portid = 0;
2442
2443 spin_unlock(®_indoor_lock);
2444
2445 reg_check_channels();
2446}
2447
2448
2449int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
2450{
2451 struct regulatory_request *request;
2452
2453 if (WARN_ON(!alpha2 || !wiphy))
2454 return -EINVAL;
2455
2456 wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG;
2457
2458 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2459 if (!request)
2460 return -ENOMEM;
2461
2462 request->wiphy_idx = get_wiphy_idx(wiphy);
2463
2464 request->alpha2[0] = alpha2[0];
2465 request->alpha2[1] = alpha2[1];
2466 request->initiator = NL80211_REGDOM_SET_BY_DRIVER;
2467
2468
2469 reset_crda_timeouts();
2470
2471 queue_regulatory_request(request);
2472
2473 return 0;
2474}
2475EXPORT_SYMBOL(regulatory_hint);
2476
2477void regulatory_hint_country_ie(struct wiphy *wiphy, enum nl80211_band band,
2478 const u8 *country_ie, u8 country_ie_len)
2479{
2480 char alpha2[2];
2481 enum environment_cap env = ENVIRON_ANY;
2482 struct regulatory_request *request = NULL, *lr;
2483
2484
2485 if (country_ie_len & 0x01)
2486 return;
2487
2488 if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
2489 return;
2490
2491 request = kzalloc(sizeof(*request), GFP_KERNEL);
2492 if (!request)
2493 return;
2494
2495 alpha2[0] = country_ie[0];
2496 alpha2[1] = country_ie[1];
2497
2498 if (country_ie[2] == 'I')
2499 env = ENVIRON_INDOOR;
2500 else if (country_ie[2] == 'O')
2501 env = ENVIRON_OUTDOOR;
2502
2503 rcu_read_lock();
2504 lr = get_last_request();
2505
2506 if (unlikely(!lr))
2507 goto out;
2508
2509
2510
2511
2512
2513
2514 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
2515 lr->wiphy_idx != WIPHY_IDX_INVALID)
2516 goto out;
2517
2518 request->wiphy_idx = get_wiphy_idx(wiphy);
2519 request->alpha2[0] = alpha2[0];
2520 request->alpha2[1] = alpha2[1];
2521 request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE;
2522 request->country_ie_env = env;
2523
2524
2525 reset_crda_timeouts();
2526
2527 queue_regulatory_request(request);
2528 request = NULL;
2529out:
2530 kfree(request);
2531 rcu_read_unlock();
2532}
2533
2534static void restore_alpha2(char *alpha2, bool reset_user)
2535{
2536
2537 alpha2[0] = '9';
2538 alpha2[1] = '7';
2539
2540
2541 if (is_user_regdom_saved()) {
2542
2543 if (reset_user) {
2544 pr_debug("Restoring regulatory settings including user preference\n");
2545 user_alpha2[0] = '9';
2546 user_alpha2[1] = '7';
2547
2548
2549
2550
2551
2552
2553 if (!is_world_regdom(ieee80211_regdom)) {
2554 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2555 ieee80211_regdom[0], ieee80211_regdom[1]);
2556 alpha2[0] = ieee80211_regdom[0];
2557 alpha2[1] = ieee80211_regdom[1];
2558 }
2559 } else {
2560 pr_debug("Restoring regulatory settings while preserving user preference for: %c%c\n",
2561 user_alpha2[0], user_alpha2[1]);
2562 alpha2[0] = user_alpha2[0];
2563 alpha2[1] = user_alpha2[1];
2564 }
2565 } else if (!is_world_regdom(ieee80211_regdom)) {
2566 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
2567 ieee80211_regdom[0], ieee80211_regdom[1]);
2568 alpha2[0] = ieee80211_regdom[0];
2569 alpha2[1] = ieee80211_regdom[1];
2570 } else
2571 pr_debug("Restoring regulatory settings\n");
2572}
2573
2574static void restore_custom_reg_settings(struct wiphy *wiphy)
2575{
2576 struct ieee80211_supported_band *sband;
2577 enum nl80211_band band;
2578 struct ieee80211_channel *chan;
2579 int i;
2580
2581 for (band = 0; band < NUM_NL80211_BANDS; band++) {
2582 sband = wiphy->bands[band];
2583 if (!sband)
2584 continue;
2585 for (i = 0; i < sband->n_channels; i++) {
2586 chan = &sband->channels[i];
2587 chan->flags = chan->orig_flags;
2588 chan->max_antenna_gain = chan->orig_mag;
2589 chan->max_power = chan->orig_mpwr;
2590 chan->beacon_found = false;
2591 }
2592 }
2593}
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610static void restore_regulatory_settings(bool reset_user)
2611{
2612 char alpha2[2];
2613 char world_alpha2[2];
2614 struct reg_beacon *reg_beacon, *btmp;
2615 LIST_HEAD(tmp_reg_req_list);
2616 struct cfg80211_registered_device *rdev;
2617
2618 ASSERT_RTNL();
2619
2620
2621
2622
2623
2624
2625 spin_lock(®_indoor_lock);
2626 if (reg_is_indoor && !reg_is_indoor_portid) {
2627 reg_is_indoor = false;
2628 reg_check_channels();
2629 }
2630 spin_unlock(®_indoor_lock);
2631
2632 reset_regdomains(true, &world_regdom);
2633 restore_alpha2(alpha2, reset_user);
2634
2635
2636
2637
2638
2639
2640
2641 spin_lock(®_requests_lock);
2642 list_splice_tail_init(®_requests_list, &tmp_reg_req_list);
2643 spin_unlock(®_requests_lock);
2644
2645
2646 spin_lock_bh(®_pending_beacons_lock);
2647 list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
2648 list_del(®_beacon->list);
2649 kfree(reg_beacon);
2650 }
2651 spin_unlock_bh(®_pending_beacons_lock);
2652
2653 list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
2654 list_del(®_beacon->list);
2655 kfree(reg_beacon);
2656 }
2657
2658
2659 world_alpha2[0] = cfg80211_world_regdom->alpha2[0];
2660 world_alpha2[1] = cfg80211_world_regdom->alpha2[1];
2661
2662 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2663 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2664 continue;
2665 if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG)
2666 restore_custom_reg_settings(&rdev->wiphy);
2667 }
2668
2669 regulatory_hint_core(world_alpha2);
2670
2671
2672
2673
2674
2675
2676 if (is_an_alpha2(alpha2))
2677 regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER);
2678
2679 spin_lock(®_requests_lock);
2680 list_splice_tail_init(&tmp_reg_req_list, ®_requests_list);
2681 spin_unlock(®_requests_lock);
2682
2683 pr_debug("Kicking the queue\n");
2684
2685 schedule_work(®_work);
2686}
2687
2688void regulatory_hint_disconnect(void)
2689{
2690 pr_debug("All devices are disconnected, going to restore regulatory settings\n");
2691 restore_regulatory_settings(false);
2692}
2693
2694static bool freq_is_chan_12_13_14(u16 freq)
2695{
2696 if (freq == ieee80211_channel_to_frequency(12, NL80211_BAND_2GHZ) ||
2697 freq == ieee80211_channel_to_frequency(13, NL80211_BAND_2GHZ) ||
2698 freq == ieee80211_channel_to_frequency(14, NL80211_BAND_2GHZ))
2699 return true;
2700 return false;
2701}
2702
2703static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan)
2704{
2705 struct reg_beacon *pending_beacon;
2706
2707 list_for_each_entry(pending_beacon, ®_pending_beacons, list)
2708 if (beacon_chan->center_freq ==
2709 pending_beacon->chan.center_freq)
2710 return true;
2711 return false;
2712}
2713
2714int regulatory_hint_found_beacon(struct wiphy *wiphy,
2715 struct ieee80211_channel *beacon_chan,
2716 gfp_t gfp)
2717{
2718 struct reg_beacon *reg_beacon;
2719 bool processing;
2720
2721 if (beacon_chan->beacon_found ||
2722 beacon_chan->flags & IEEE80211_CHAN_RADAR ||
2723 (beacon_chan->band == NL80211_BAND_2GHZ &&
2724 !freq_is_chan_12_13_14(beacon_chan->center_freq)))
2725 return 0;
2726
2727 spin_lock_bh(®_pending_beacons_lock);
2728 processing = pending_reg_beacon(beacon_chan);
2729 spin_unlock_bh(®_pending_beacons_lock);
2730
2731 if (processing)
2732 return 0;
2733
2734 reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp);
2735 if (!reg_beacon)
2736 return -ENOMEM;
2737
2738 pr_debug("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
2739 beacon_chan->center_freq,
2740 ieee80211_frequency_to_channel(beacon_chan->center_freq),
2741 wiphy_name(wiphy));
2742
2743 memcpy(®_beacon->chan, beacon_chan,
2744 sizeof(struct ieee80211_channel));
2745
2746
2747
2748
2749
2750 spin_lock_bh(®_pending_beacons_lock);
2751 list_add_tail(®_beacon->list, ®_pending_beacons);
2752 spin_unlock_bh(®_pending_beacons_lock);
2753
2754 schedule_work(®_work);
2755
2756 return 0;
2757}
2758
2759static void print_rd_rules(const struct ieee80211_regdomain *rd)
2760{
2761 unsigned int i;
2762 const struct ieee80211_reg_rule *reg_rule = NULL;
2763 const struct ieee80211_freq_range *freq_range = NULL;
2764 const struct ieee80211_power_rule *power_rule = NULL;
2765 char bw[32], cac_time[32];
2766
2767 pr_debug(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
2768
2769 for (i = 0; i < rd->n_reg_rules; i++) {
2770 reg_rule = &rd->reg_rules[i];
2771 freq_range = ®_rule->freq_range;
2772 power_rule = ®_rule->power_rule;
2773
2774 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
2775 snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO",
2776 freq_range->max_bandwidth_khz,
2777 reg_get_max_bandwidth(rd, reg_rule));
2778 else
2779 snprintf(bw, sizeof(bw), "%d KHz",
2780 freq_range->max_bandwidth_khz);
2781
2782 if (reg_rule->flags & NL80211_RRF_DFS)
2783 scnprintf(cac_time, sizeof(cac_time), "%u s",
2784 reg_rule->dfs_cac_ms/1000);
2785 else
2786 scnprintf(cac_time, sizeof(cac_time), "N/A");
2787
2788
2789
2790
2791
2792
2793 if (power_rule->max_antenna_gain)
2794 pr_debug(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
2795 freq_range->start_freq_khz,
2796 freq_range->end_freq_khz,
2797 bw,
2798 power_rule->max_antenna_gain,
2799 power_rule->max_eirp,
2800 cac_time);
2801 else
2802 pr_debug(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
2803 freq_range->start_freq_khz,
2804 freq_range->end_freq_khz,
2805 bw,
2806 power_rule->max_eirp,
2807 cac_time);
2808 }
2809}
2810
2811bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region)
2812{
2813 switch (dfs_region) {
2814 case NL80211_DFS_UNSET:
2815 case NL80211_DFS_FCC:
2816 case NL80211_DFS_ETSI:
2817 case NL80211_DFS_JP:
2818 return true;
2819 default:
2820 pr_debug("Ignoring uknown DFS master region: %d\n", dfs_region);
2821 return false;
2822 }
2823}
2824
2825static void print_regdomain(const struct ieee80211_regdomain *rd)
2826{
2827 struct regulatory_request *lr = get_last_request();
2828
2829 if (is_intersected_alpha2(rd->alpha2)) {
2830 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
2831 struct cfg80211_registered_device *rdev;
2832 rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx);
2833 if (rdev) {
2834 pr_debug("Current regulatory domain updated by AP to: %c%c\n",
2835 rdev->country_ie_alpha2[0],
2836 rdev->country_ie_alpha2[1]);
2837 } else
2838 pr_debug("Current regulatory domain intersected:\n");
2839 } else
2840 pr_debug("Current regulatory domain intersected:\n");
2841 } else if (is_world_regdom(rd->alpha2)) {
2842 pr_debug("World regulatory domain updated:\n");
2843 } else {
2844 if (is_unknown_alpha2(rd->alpha2))
2845 pr_debug("Regulatory domain changed to driver built-in settings (unknown country)\n");
2846 else {
2847 if (reg_request_cell_base(lr))
2848 pr_debug("Regulatory domain changed to country: %c%c by Cell Station\n",
2849 rd->alpha2[0], rd->alpha2[1]);
2850 else
2851 pr_debug("Regulatory domain changed to country: %c%c\n",
2852 rd->alpha2[0], rd->alpha2[1]);
2853 }
2854 }
2855
2856 pr_debug(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region));
2857 print_rd_rules(rd);
2858}
2859
2860static void print_regdomain_info(const struct ieee80211_regdomain *rd)
2861{
2862 pr_debug("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]);
2863 print_rd_rules(rd);
2864}
2865
2866static int reg_set_rd_core(const struct ieee80211_regdomain *rd)
2867{
2868 if (!is_world_regdom(rd->alpha2))
2869 return -EINVAL;
2870 update_world_regdomain(rd);
2871 return 0;
2872}
2873
2874static int reg_set_rd_user(const struct ieee80211_regdomain *rd,
2875 struct regulatory_request *user_request)
2876{
2877 const struct ieee80211_regdomain *intersected_rd = NULL;
2878
2879 if (!regdom_changes(rd->alpha2))
2880 return -EALREADY;
2881
2882 if (!is_valid_rd(rd)) {
2883 pr_err("Invalid regulatory domain detected: %c%c\n",
2884 rd->alpha2[0], rd->alpha2[1]);
2885 print_regdomain_info(rd);
2886 return -EINVAL;
2887 }
2888
2889 if (!user_request->intersect) {
2890 reset_regdomains(false, rd);
2891 return 0;
2892 }
2893
2894 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
2895 if (!intersected_rd)
2896 return -EINVAL;
2897
2898 kfree(rd);
2899 rd = NULL;
2900 reset_regdomains(false, intersected_rd);
2901
2902 return 0;
2903}
2904
2905static int reg_set_rd_driver(const struct ieee80211_regdomain *rd,
2906 struct regulatory_request *driver_request)
2907{
2908 const struct ieee80211_regdomain *regd;
2909 const struct ieee80211_regdomain *intersected_rd = NULL;
2910 const struct ieee80211_regdomain *tmp;
2911 struct wiphy *request_wiphy;
2912
2913 if (is_world_regdom(rd->alpha2))
2914 return -EINVAL;
2915
2916 if (!regdom_changes(rd->alpha2))
2917 return -EALREADY;
2918
2919 if (!is_valid_rd(rd)) {
2920 pr_err("Invalid regulatory domain detected: %c%c\n",
2921 rd->alpha2[0], rd->alpha2[1]);
2922 print_regdomain_info(rd);
2923 return -EINVAL;
2924 }
2925
2926 request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx);
2927 if (!request_wiphy)
2928 return -ENODEV;
2929
2930 if (!driver_request->intersect) {
2931 if (request_wiphy->regd)
2932 return -EALREADY;
2933
2934 regd = reg_copy_regd(rd);
2935 if (IS_ERR(regd))
2936 return PTR_ERR(regd);
2937
2938 rcu_assign_pointer(request_wiphy->regd, regd);
2939 reset_regdomains(false, rd);
2940 return 0;
2941 }
2942
2943 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
2944 if (!intersected_rd)
2945 return -EINVAL;
2946
2947
2948
2949
2950
2951
2952 tmp = get_wiphy_regdom(request_wiphy);
2953 rcu_assign_pointer(request_wiphy->regd, rd);
2954 rcu_free_regdom(tmp);
2955
2956 rd = NULL;
2957
2958 reset_regdomains(false, intersected_rd);
2959
2960 return 0;
2961}
2962
2963static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd,
2964 struct regulatory_request *country_ie_request)
2965{
2966 struct wiphy *request_wiphy;
2967
2968 if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
2969 !is_unknown_alpha2(rd->alpha2))
2970 return -EINVAL;
2971
2972
2973
2974
2975
2976
2977
2978 if (!is_valid_rd(rd)) {
2979 pr_err("Invalid regulatory domain detected: %c%c\n",
2980 rd->alpha2[0], rd->alpha2[1]);
2981 print_regdomain_info(rd);
2982 return -EINVAL;
2983 }
2984
2985 request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx);
2986 if (!request_wiphy)
2987 return -ENODEV;
2988
2989 if (country_ie_request->intersect)
2990 return -EINVAL;
2991
2992 reset_regdomains(false, rd);
2993 return 0;
2994}
2995
2996
2997
2998
2999
3000
3001int set_regdom(const struct ieee80211_regdomain *rd,
3002 enum ieee80211_regd_source regd_src)
3003{
3004 struct regulatory_request *lr;
3005 bool user_reset = false;
3006 int r;
3007
3008 if (!reg_is_valid_request(rd->alpha2)) {
3009 kfree(rd);
3010 return -EINVAL;
3011 }
3012
3013 if (regd_src == REGD_SOURCE_CRDA)
3014 reset_crda_timeouts();
3015
3016 lr = get_last_request();
3017
3018
3019 switch (lr->initiator) {
3020 case NL80211_REGDOM_SET_BY_CORE:
3021 r = reg_set_rd_core(rd);
3022 break;
3023 case NL80211_REGDOM_SET_BY_USER:
3024 r = reg_set_rd_user(rd, lr);
3025 user_reset = true;
3026 break;
3027 case NL80211_REGDOM_SET_BY_DRIVER:
3028 r = reg_set_rd_driver(rd, lr);
3029 break;
3030 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
3031 r = reg_set_rd_country_ie(rd, lr);
3032 break;
3033 default:
3034 WARN(1, "invalid initiator %d\n", lr->initiator);
3035 kfree(rd);
3036 return -EINVAL;
3037 }
3038
3039 if (r) {
3040 switch (r) {
3041 case -EALREADY:
3042 reg_set_request_processed();
3043 break;
3044 default:
3045
3046 restore_regulatory_settings(user_reset);
3047 }
3048
3049 kfree(rd);
3050 return r;
3051 }
3052
3053
3054 if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom()))
3055 return -EINVAL;
3056
3057
3058 update_all_wiphy_regulatory(lr->initiator);
3059
3060 print_regdomain(get_cfg80211_regdom());
3061
3062 nl80211_send_reg_change_event(lr);
3063
3064 reg_set_request_processed();
3065
3066 return 0;
3067}
3068
3069static int __regulatory_set_wiphy_regd(struct wiphy *wiphy,
3070 struct ieee80211_regdomain *rd)
3071{
3072 const struct ieee80211_regdomain *regd;
3073 const struct ieee80211_regdomain *prev_regd;
3074 struct cfg80211_registered_device *rdev;
3075
3076 if (WARN_ON(!wiphy || !rd))
3077 return -EINVAL;
3078
3079 if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED),
3080 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
3081 return -EPERM;
3082
3083 if (WARN(!is_valid_rd(rd), "Invalid regulatory domain detected\n")) {
3084 print_regdomain_info(rd);
3085 return -EINVAL;
3086 }
3087
3088 regd = reg_copy_regd(rd);
3089 if (IS_ERR(regd))
3090 return PTR_ERR(regd);
3091
3092 rdev = wiphy_to_rdev(wiphy);
3093
3094 spin_lock(®_requests_lock);
3095 prev_regd = rdev->requested_regd;
3096 rdev->requested_regd = regd;
3097 spin_unlock(®_requests_lock);
3098
3099 kfree(prev_regd);
3100 return 0;
3101}
3102
3103int regulatory_set_wiphy_regd(struct wiphy *wiphy,
3104 struct ieee80211_regdomain *rd)
3105{
3106 int ret = __regulatory_set_wiphy_regd(wiphy, rd);
3107
3108 if (ret)
3109 return ret;
3110
3111 schedule_work(®_work);
3112 return 0;
3113}
3114EXPORT_SYMBOL(regulatory_set_wiphy_regd);
3115
3116int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy *wiphy,
3117 struct ieee80211_regdomain *rd)
3118{
3119 int ret;
3120
3121 ASSERT_RTNL();
3122
3123 ret = __regulatory_set_wiphy_regd(wiphy, rd);
3124 if (ret)
3125 return ret;
3126
3127
3128 reg_process_self_managed_hints();
3129 return 0;
3130}
3131EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl);
3132
3133void wiphy_regulatory_register(struct wiphy *wiphy)
3134{
3135 struct regulatory_request *lr;
3136
3137
3138 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
3139 wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS |
3140 REGULATORY_COUNTRY_IE_IGNORE;
3141
3142 if (!reg_dev_ignore_cell_hint(wiphy))
3143 reg_num_devs_support_basehint++;
3144
3145 lr = get_last_request();
3146 wiphy_update_regulatory(wiphy, lr->initiator);
3147 wiphy_all_share_dfs_chan_state(wiphy);
3148}
3149
3150void wiphy_regulatory_deregister(struct wiphy *wiphy)
3151{
3152 struct wiphy *request_wiphy = NULL;
3153 struct regulatory_request *lr;
3154
3155 lr = get_last_request();
3156
3157 if (!reg_dev_ignore_cell_hint(wiphy))
3158 reg_num_devs_support_basehint--;
3159
3160 rcu_free_regdom(get_wiphy_regdom(wiphy));
3161 RCU_INIT_POINTER(wiphy->regd, NULL);
3162
3163 if (lr)
3164 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
3165
3166 if (!request_wiphy || request_wiphy != wiphy)
3167 return;
3168
3169 lr->wiphy_idx = WIPHY_IDX_INVALID;
3170 lr->country_ie_env = ENVIRON_ANY;
3171}
3172
3173
3174
3175
3176
3177int cfg80211_get_unii(int freq)
3178{
3179
3180 if (freq >= 5150 && freq <= 5250)
3181 return 0;
3182
3183
3184 if (freq > 5250 && freq <= 5350)
3185 return 1;
3186
3187
3188 if (freq > 5350 && freq <= 5470)
3189 return 2;
3190
3191
3192 if (freq > 5470 && freq <= 5725)
3193 return 3;
3194
3195
3196 if (freq > 5725 && freq <= 5825)
3197 return 4;
3198
3199 return -EINVAL;
3200}
3201
3202bool regulatory_indoor_allowed(void)
3203{
3204 return reg_is_indoor;
3205}
3206
3207bool regulatory_pre_cac_allowed(struct wiphy *wiphy)
3208{
3209 const struct ieee80211_regdomain *regd = NULL;
3210 const struct ieee80211_regdomain *wiphy_regd = NULL;
3211 bool pre_cac_allowed = false;
3212
3213 rcu_read_lock();
3214
3215 regd = rcu_dereference(cfg80211_regdomain);
3216 wiphy_regd = rcu_dereference(wiphy->regd);
3217 if (!wiphy_regd) {
3218 if (regd->dfs_region == NL80211_DFS_ETSI)
3219 pre_cac_allowed = true;
3220
3221 rcu_read_unlock();
3222
3223 return pre_cac_allowed;
3224 }
3225
3226 if (regd->dfs_region == wiphy_regd->dfs_region &&
3227 wiphy_regd->dfs_region == NL80211_DFS_ETSI)
3228 pre_cac_allowed = true;
3229
3230 rcu_read_unlock();
3231
3232 return pre_cac_allowed;
3233}
3234
3235void regulatory_propagate_dfs_state(struct wiphy *wiphy,
3236 struct cfg80211_chan_def *chandef,
3237 enum nl80211_dfs_state dfs_state,
3238 enum nl80211_radar_event event)
3239{
3240 struct cfg80211_registered_device *rdev;
3241
3242 ASSERT_RTNL();
3243
3244 if (WARN_ON(!cfg80211_chandef_valid(chandef)))
3245 return;
3246
3247 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
3248 if (wiphy == &rdev->wiphy)
3249 continue;
3250
3251 if (!reg_dfs_domain_same(wiphy, &rdev->wiphy))
3252 continue;
3253
3254 if (!ieee80211_get_channel(&rdev->wiphy,
3255 chandef->chan->center_freq))
3256 continue;
3257
3258 cfg80211_set_dfs_state(&rdev->wiphy, chandef, dfs_state);
3259
3260 if (event == NL80211_RADAR_DETECTED ||
3261 event == NL80211_RADAR_CAC_FINISHED)
3262 cfg80211_sched_dfs_chan_update(rdev);
3263
3264 nl80211_radar_notify(rdev, chandef, event, NULL, GFP_KERNEL);
3265 }
3266}
3267
3268int __init regulatory_init(void)
3269{
3270 int err = 0;
3271
3272 reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
3273 if (IS_ERR(reg_pdev))
3274 return PTR_ERR(reg_pdev);
3275
3276 spin_lock_init(®_requests_lock);
3277 spin_lock_init(®_pending_beacons_lock);
3278 spin_lock_init(®_indoor_lock);
3279
3280 reg_regdb_size_check();
3281
3282 rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom);
3283
3284 user_alpha2[0] = '9';
3285 user_alpha2[1] = '7';
3286
3287
3288 err = regulatory_hint_core(cfg80211_world_regdom->alpha2);
3289 if (err) {
3290 if (err == -ENOMEM) {
3291 platform_device_unregister(reg_pdev);
3292 return err;
3293 }
3294
3295
3296
3297
3298
3299
3300
3301 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
3302 }
3303
3304
3305
3306
3307
3308 if (!is_world_regdom(ieee80211_regdom))
3309 regulatory_hint_user(ieee80211_regdom,
3310 NL80211_USER_REG_HINT_USER);
3311
3312 return 0;
3313}
3314
3315void regulatory_exit(void)
3316{
3317 struct regulatory_request *reg_request, *tmp;
3318 struct reg_beacon *reg_beacon, *btmp;
3319
3320 cancel_work_sync(®_work);
3321 cancel_crda_timeout_sync();
3322 cancel_delayed_work_sync(®_check_chans);
3323
3324
3325 rtnl_lock();
3326 reset_regdomains(true, NULL);
3327 rtnl_unlock();
3328
3329 dev_set_uevent_suppress(®_pdev->dev, true);
3330
3331 platform_device_unregister(reg_pdev);
3332
3333 list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) {
3334 list_del(®_beacon->list);
3335 kfree(reg_beacon);
3336 }
3337
3338 list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) {
3339 list_del(®_beacon->list);
3340 kfree(reg_beacon);
3341 }
3342
3343 list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) {
3344 list_del(®_request->list);
3345 kfree(reg_request);
3346 }
3347}
3348