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cfg80211: add helper fn for single rule channels
[linux-2.6-block.git] / net / wireless / reg.c
CommitLineData
8318d78a
JB		 1/*
2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
3b77d5ec 5 * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com>
2740f0cf 6 * Copyright 2013-2014 Intel Mobile Communications GmbH
4e0854a7 7 * Copyright 2017 Intel Deutschland GmbH
e646a025 8 * Copyright (C) 2018 - 2019 Intel Corporation
8318d78a 9 *
3b77d5ec
LR		 10 * Permission to use, copy, modify, and/or distribute this software for any
11 * purpose with or without fee is hereby granted, provided that the above
12 * copyright notice and this permission notice appear in all copies.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
15 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
16 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
17 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
18 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
19 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
20 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
8318d78a
JB		 21 */
22
3b77d5ec 23
b2e1b302
LR		 24/**
25 * DOC: Wireless regulatory infrastructure
8318d78a
JB		 26 *
27 * The usual implementation is for a driver to read a device EEPROM to
28 * determine which regulatory domain it should be operating under, then
29 * looking up the allowable channels in a driver-local table and finally
30 * registering those channels in the wiphy structure.
31 *
b2e1b302
LR		 32 * Another set of compliance enforcement is for drivers to use their
33 * own compliance limits which can be stored on the EEPROM. The host
34 * driver or firmware may ensure these are used.
35 *
36 * In addition to all this we provide an extra layer of regulatory
37 * conformance. For drivers which do not have any regulatory
38 * information CRDA provides the complete regulatory solution.
39 * For others it provides a community effort on further restrictions
40 * to enhance compliance.
41 *
42 * Note: When number of rules --> infinity we will not be able to
43 * index on alpha2 any more, instead we'll probably have to
44 * rely on some SHA1 checksum of the regdomain for example.
45 *
8318d78a 46 */
e9c0268f
JP		 47
48#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
49
8318d78a 50#include <linux/kernel.h>
bc3b2d7f 51#include <linux/export.h>
5a0e3ad6 52#include <linux/slab.h>
b2e1b302 53#include <linux/list.h>
c61029c7 54#include <linux/ctype.h>
b2e1b302
LR		 55#include <linux/nl80211.h>
56#include <linux/platform_device.h>
90a53e44 57#include <linux/verification.h>
d9b93842 58#include <linux/moduleparam.h>
007f6c5e 59#include <linux/firmware.h>
b2e1b302 60#include <net/cfg80211.h>
8318d78a 61#include "core.h"
b2e1b302 62#include "reg.h"
ad932f04 63#include "rdev-ops.h"
73d54c9e 64#include "nl80211.h"
8318d78a 65
ad932f04
AN		 66/*
67 * Grace period we give before making sure all current interfaces reside on
68 * channels allowed by the current regulatory domain.
69 */
70#define REG_ENFORCE_GRACE_MS 60000
71
52616f2b
IP		 72/**
73 * enum reg_request_treatment - regulatory request treatment
74 *
75 * @REG_REQ_OK: continue processing the regulatory request
76 * @REG_REQ_IGNORE: ignore the regulatory request
77 * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should
78 * be intersected with the current one.
79 * @REG_REQ_ALREADY_SET: the regulatory request will not change the current
80 * regulatory settings, and no further processing is required.
52616f2b 81 */
2f92212b
JB		 82enum reg_request_treatment {
83 REG_REQ_OK,
84 REG_REQ_IGNORE,
85 REG_REQ_INTERSECT,
86 REG_REQ_ALREADY_SET,
87};
88
a042994d
LR		 89static struct regulatory_request core_request_world = {
90 .initiator = NL80211_REGDOM_SET_BY_CORE,
91 .alpha2[0] = '0',
92 .alpha2[1] = '0',
93 .intersect = false,
94 .processed = true,
95 .country_ie_env = ENVIRON_ANY,
96};
97
38fd2143
JB		 98/*
99 * Receipt of information from last regulatory request,
100 * protected by RTNL (and can be accessed with RCU protection)
101 */
c492db37 102static struct regulatory_request __rcu *last_request =
cec3f0ed 103 (void __force __rcu *)&core_request_world;
734366de 104
007f6c5e 105/* To trigger userspace events and load firmware */
b2e1b302 106static struct platform_device *reg_pdev;
8318d78a 107
fb1fc7ad
LR		 108/*
109 * Central wireless core regulatory domains, we only need two,
734366de 110 * the current one and a world regulatory domain in case we have no
e8da2bb4 111 * information to give us an alpha2.
38fd2143 112 * (protected by RTNL, can be read under RCU)
fb1fc7ad 113 */
458f4f9e 114const struct ieee80211_regdomain __rcu *cfg80211_regdomain;
734366de 115
57b5ce07
LR		 116/*
117 * Number of devices that registered to the core
118 * that support cellular base station regulatory hints
38fd2143 119 * (protected by RTNL)
57b5ce07
LR		 120 */
121static int reg_num_devs_support_basehint;
122
52616f2b
IP		 123/*
124 * State variable indicating if the platform on which the devices
125 * are attached is operating in an indoor environment. The state variable
126 * is relevant for all registered devices.
52616f2b
IP		 127 */
128static bool reg_is_indoor;
05050753
I		 129static spinlock_t reg_indoor_lock;
130
131/* Used to track the userspace process controlling the indoor setting */
132static u32 reg_is_indoor_portid;
52616f2b 133
e646a025
JB		 134static void restore_regulatory_settings(bool reset_user, bool cached);
135static void print_regdomain(const struct ieee80211_regdomain *rd);
c37722bd 136
458f4f9e
JB		 137static const struct ieee80211_regdomain *get_cfg80211_regdom(void)
138{
5bf16a11 139 return rcu_dereference_rtnl(cfg80211_regdomain);
458f4f9e
JB		 140}
141
ad30ca2c 142const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy)
458f4f9e 143{
5bf16a11 144 return rcu_dereference_rtnl(wiphy->regd);
458f4f9e
JB		 145}
146
3ef121b5
LR		 147static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region)
148{
149 switch (dfs_region) {
150 case NL80211_DFS_UNSET:
151 return "unset";
152 case NL80211_DFS_FCC:
153 return "FCC";
154 case NL80211_DFS_ETSI:
155 return "ETSI";
156 case NL80211_DFS_JP:
157 return "JP";
158 }
159 return "Unknown";
160}
161
6c474799
LR		 162enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy)
163{
164 const struct ieee80211_regdomain *regd = NULL;
165 const struct ieee80211_regdomain *wiphy_regd = NULL;
166
167 regd = get_cfg80211_regdom();
168 if (!wiphy)
169 goto out;
170
171 wiphy_regd = get_wiphy_regdom(wiphy);
172 if (!wiphy_regd)
173 goto out;
174
175 if (wiphy_regd->dfs_region == regd->dfs_region)
176 goto out;
177
c799ba6e
JB		 178 pr_debug("%s: device specific dfs_region (%s) disagrees with cfg80211's central dfs_region (%s)\n",
179 dev_name(&wiphy->dev),
180 reg_dfs_region_str(wiphy_regd->dfs_region),
181 reg_dfs_region_str(regd->dfs_region));
6c474799
LR		 182
183out:
184 return regd->dfs_region;
185}
186
458f4f9e
JB		 187static void rcu_free_regdom(const struct ieee80211_regdomain *r)
188{
189 if (!r)
190 return;
191 kfree_rcu((struct ieee80211_regdomain *)r, rcu_head);
192}
193
c492db37
JB		 194static struct regulatory_request *get_last_request(void)
195{
38fd2143 196 return rcu_dereference_rtnl(last_request);
c492db37
JB		 197}
198
e38f8a7a 199/* Used to queue up regulatory hints */
fe33eb39
LR		 200static LIST_HEAD(reg_requests_list);
201static spinlock_t reg_requests_lock;
202
e38f8a7a
LR		 203/* Used to queue up beacon hints for review */
204static LIST_HEAD(reg_pending_beacons);
205static spinlock_t reg_pending_beacons_lock;
206
207/* Used to keep track of processed beacon hints */
208static LIST_HEAD(reg_beacon_list);
209
210struct reg_beacon {
211 struct list_head list;
212 struct ieee80211_channel chan;
213};
214
ad932f04
AN		 215static void reg_check_chans_work(struct work_struct *work);
216static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work);
217
f333a7a2
LR		 218static void reg_todo(struct work_struct *work);
219static DECLARE_WORK(reg_work, reg_todo);
220
734366de
JB		 221/* We keep a static world regulatory domain in case of the absence of CRDA */
222static const struct ieee80211_regdomain world_regdom = {
28981e5e 223 .n_reg_rules = 8,
734366de
JB		 224 .alpha2 = "00",
225 .reg_rules = {
68798a62
LR		 226 /* IEEE 802.11b/g, channels 1..11 */
227 REG_RULE(2412-10, 2462+10, 40, 6, 20, 0),
43c771a1 228 /* IEEE 802.11b/g, channels 12..13. */
c3826807
JB		 229 REG_RULE(2467-10, 2472+10, 20, 6, 20,
230 NL80211_RRF_NO_IR | NL80211_RRF_AUTO_BW),
611b6a82
LR		 231 /* IEEE 802.11 channel 14 - Only JP enables
232 * this and for 802.11b only */
233 REG_RULE(2484-10, 2484+10, 20, 6, 20,
8fe02e16 234 NL80211_RRF_NO_IR |
611b6a82
LR		 235 NL80211_RRF_NO_OFDM),
236 /* IEEE 802.11a, channel 36..48 */
c3826807
JB		 237 REG_RULE(5180-10, 5240+10, 80, 6, 20,
238 NL80211_RRF_NO_IR |
239 NL80211_RRF_AUTO_BW),
3fc71f77 240
131a19bc 241 /* IEEE 802.11a, channel 52..64 - DFS required */
c3826807 242 REG_RULE(5260-10, 5320+10, 80, 6, 20,
8fe02e16 243 NL80211_RRF_NO_IR |
c3826807 244 NL80211_RRF_AUTO_BW |
131a19bc
JB		 245 NL80211_RRF_DFS),
246
247 /* IEEE 802.11a, channel 100..144 - DFS required */
248 REG_RULE(5500-10, 5720+10, 160, 6, 20,
8fe02e16 249 NL80211_RRF_NO_IR |
131a19bc 250 NL80211_RRF_DFS),
3fc71f77
LR		 251
252 /* IEEE 802.11a, channel 149..165 */
8ab9d85c 253 REG_RULE(5745-10, 5825+10, 80, 6, 20,
8fe02e16 254 NL80211_RRF_NO_IR),
90cdc6df 255
8047d261 256 /* IEEE 802.11ad (60GHz), channels 1..3 */
90cdc6df 257 REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0),
734366de
JB		 258 }
259};
260
38fd2143 261/* protected by RTNL */
a3d2eaf0
JB		 262static const struct ieee80211_regdomain *cfg80211_world_regdom =
263 &world_regdom;
734366de 264
6ee7d330 265static char *ieee80211_regdom = "00";
09d989d1 266static char user_alpha2[2];
e646a025 267static const struct ieee80211_regdomain *cfg80211_user_regdom;
6ee7d330 268
734366de
JB		 269module_param(ieee80211_regdom, charp, 0444);
270MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code");
271
c888393b 272static void reg_free_request(struct regulatory_request *request)
5ad6ef5e 273{
d34265a3
JB		 274 if (request == &core_request_world)
275 return;
276
c888393b
AN		 277 if (request != get_last_request())
278 kfree(request);
279}
280
281static void reg_free_last_request(void)
282{
283 struct regulatory_request *lr = get_last_request();
284
5ad6ef5e
LR		 285 if (lr != &core_request_world && lr)
286 kfree_rcu(lr, rcu_head);
287}
288
05f1a3ea
LR		 289static void reg_update_last_request(struct regulatory_request *request)
290{
255e25b0
LR		 291 struct regulatory_request *lr;
292
293 lr = get_last_request();
294 if (lr == request)
295 return;
296
c888393b 297 reg_free_last_request();
05f1a3ea
LR		 298 rcu_assign_pointer(last_request, request);
299}
300
379b82f4
JB		 301static void reset_regdomains(bool full_reset,
302 const struct ieee80211_regdomain *new_regdom)
734366de 303{
458f4f9e
JB		 304 const struct ieee80211_regdomain *r;
305
38fd2143 306 ASSERT_RTNL();
e8da2bb4 307
458f4f9e
JB		 308 r = get_cfg80211_regdom();
309
942b25cf 310 /* avoid freeing static information or freeing something twice */
458f4f9e
JB		 311 if (r == cfg80211_world_regdom)
312 r = NULL;
942b25cf
JB		 313 if (cfg80211_world_regdom == &world_regdom)
314 cfg80211_world_regdom = NULL;
458f4f9e
JB		 315 if (r == &world_regdom)
316 r = NULL;
942b25cf 317
458f4f9e
JB		 318 rcu_free_regdom(r);
319 rcu_free_regdom(cfg80211_world_regdom);
734366de 320
a3d2eaf0 321 cfg80211_world_regdom = &world_regdom;
458f4f9e 322 rcu_assign_pointer(cfg80211_regdomain, new_regdom);
a042994d
LR		 323
324 if (!full_reset)
325 return;
326
05f1a3ea 327 reg_update_last_request(&core_request_world);
734366de
JB		 328}
329
fb1fc7ad
LR		 330/*
331 * Dynamic world regulatory domain requested by the wireless
332 * core upon initialization
333 */
a3d2eaf0 334static void update_world_regdomain(const struct ieee80211_regdomain *rd)
734366de 335{
c492db37 336 struct regulatory_request *lr;
734366de 337
c492db37
JB		 338 lr = get_last_request();
339
340 WARN_ON(!lr);
734366de 341
379b82f4 342 reset_regdomains(false, rd);
734366de
JB		 343
344 cfg80211_world_regdom = rd;
734366de 345}
734366de 346
a3d2eaf0 347bool is_world_regdom(const char *alpha2)
b2e1b302
LR		 348{
349 if (!alpha2)
350 return false;
1a919318 351 return alpha2[0] == '0' && alpha2[1] == '0';
b2e1b302 352}
8318d78a 353
a3d2eaf0 354static bool is_alpha2_set(const char *alpha2)
b2e1b302
LR		 355{
356 if (!alpha2)
357 return false;
1a919318 358 return alpha2[0] && alpha2[1];
b2e1b302 359}
8318d78a 360
a3d2eaf0 361static bool is_unknown_alpha2(const char *alpha2)
b2e1b302
LR		 362{
363 if (!alpha2)
364 return false;
fb1fc7ad
LR		 365 /*
366 * Special case where regulatory domain was built by driver
367 * but a specific alpha2 cannot be determined
368 */
1a919318 369 return alpha2[0] == '9' && alpha2[1] == '9';
b2e1b302 370}
8318d78a 371
3f2355cb
LR		 372static bool is_intersected_alpha2(const char *alpha2)
373{
374 if (!alpha2)
375 return false;
fb1fc7ad
LR		 376 /*
377 * Special case where regulatory domain is the
3f2355cb 378 * result of an intersection between two regulatory domain
fb1fc7ad
LR		 379 * structures
380 */
1a919318 381 return alpha2[0] == '9' && alpha2[1] == '8';
3f2355cb
LR		 382}
383
a3d2eaf0 384static bool is_an_alpha2(const char *alpha2)
b2e1b302
LR		 385{
386 if (!alpha2)
387 return false;
1a919318 388 return isalpha(alpha2[0]) && isalpha(alpha2[1]);
b2e1b302 389}
8318d78a 390
a3d2eaf0 391static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y)
b2e1b302
LR		 392{
393 if (!alpha2_x || !alpha2_y)
394 return false;
1a919318 395 return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1];
b2e1b302
LR		 396}
397
69b1572b 398static bool regdom_changes(const char *alpha2)
b2e1b302 399{
458f4f9e 400 const struct ieee80211_regdomain *r = get_cfg80211_regdom();
761cf7ec 401
458f4f9e 402 if (!r)
b2e1b302 403 return true;
458f4f9e 404 return !alpha2_equal(r->alpha2, alpha2);
b2e1b302
LR		 405}
406
09d989d1
LR		 407/*
408 * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets
409 * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER
410 * has ever been issued.
411 */
412static bool is_user_regdom_saved(void)
413{
414 if (user_alpha2[0] == '9' && user_alpha2[1] == '7')
415 return false;
416
417 /* This would indicate a mistake on the design */
1a919318 418 if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2),
09d989d1 419 "Unexpected user alpha2: %c%c\n",
1a919318 420 user_alpha2[0], user_alpha2[1]))
09d989d1
LR		 421 return false;
422
423 return true;
424}
425
e9763c3c
JB		 426static const struct ieee80211_regdomain *
427reg_copy_regd(const struct ieee80211_regdomain *src_regd)
3b377ea9
JL		 428{
429 struct ieee80211_regdomain *regd;
3b377ea9
JL		 430 unsigned int i;
431
9f8c7136
GS		 432 regd = kzalloc(struct_size(regd, reg_rules, src_regd->n_reg_rules),
433 GFP_KERNEL);
3b377ea9 434 if (!regd)
e9763c3c 435 return ERR_PTR(-ENOMEM);
3b377ea9
JL		 436
437 memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain));
438
38cb87ee 439 for (i = 0; i < src_regd->n_reg_rules; i++)
3b377ea9 440 memcpy(&regd->reg_rules[i], &src_regd->reg_rules[i],
e9763c3c 441 sizeof(struct ieee80211_reg_rule));
3b377ea9 442
e9763c3c 443 return regd;
3b377ea9
JL		 444}
445
e646a025
JB		 446static void cfg80211_save_user_regdom(const struct ieee80211_regdomain *rd)
447{
448 ASSERT_RTNL();
449
450 if (!IS_ERR(cfg80211_user_regdom))
451 kfree(cfg80211_user_regdom);
452 cfg80211_user_regdom = reg_copy_regd(rd);
453}
454
c7d319e5 455struct reg_regdb_apply_request {
3b377ea9 456 struct list_head list;
c7d319e5 457 const struct ieee80211_regdomain *regdom;
3b377ea9
JL		 458};
459
c7d319e5
JB		 460static LIST_HEAD(reg_regdb_apply_list);
461static DEFINE_MUTEX(reg_regdb_apply_mutex);
3b377ea9 462
c7d319e5 463static void reg_regdb_apply(struct work_struct *work)
3b377ea9 464{
c7d319e5 465 struct reg_regdb_apply_request *request;
a85d0d7f 466
5fe231e8 467 rtnl_lock();
3b377ea9 468
c7d319e5
JB		 469 mutex_lock(&reg_regdb_apply_mutex);
470 while (!list_empty(&reg_regdb_apply_list)) {
471 request = list_first_entry(&reg_regdb_apply_list,
472 struct reg_regdb_apply_request,
3b377ea9
JL		 473 list);
474 list_del(&request->list);
475
c7d319e5 476 set_regdom(request->regdom, REGD_SOURCE_INTERNAL_DB);
3b377ea9
JL		 477 kfree(request);
478 }
c7d319e5 479 mutex_unlock(&reg_regdb_apply_mutex);
a85d0d7f 480
5fe231e8 481 rtnl_unlock();
3b377ea9
JL		 482}
483
c7d319e5 484static DECLARE_WORK(reg_regdb_work, reg_regdb_apply);
3b377ea9 485
007f6c5e 486static int reg_schedule_apply(const struct ieee80211_regdomain *regdom)
3b377ea9 487{
c7d319e5 488 struct reg_regdb_apply_request *request;
3b377ea9 489
c7d319e5 490 request = kzalloc(sizeof(struct reg_regdb_apply_request), GFP_KERNEL);
007f6c5e
JB		 491 if (!request) {
492 kfree(regdom);
c7d319e5
JB		 493 return -ENOMEM;
494 }
3b377ea9 495
007f6c5e
JB		 496 request->regdom = regdom;
497
c7d319e5
JB		 498 mutex_lock(&reg_regdb_apply_mutex);
499 list_add_tail(&request->list, &reg_regdb_apply_list);
500 mutex_unlock(&reg_regdb_apply_mutex);
3b377ea9
JL		 501
502 schedule_work(&reg_regdb_work);
c7d319e5 503 return 0;
3b377ea9 504}
80007efe 505
b6863036
JB		 506#ifdef CONFIG_CFG80211_CRDA_SUPPORT
507/* Max number of consecutive attempts to communicate with CRDA */
508#define REG_MAX_CRDA_TIMEOUTS 10
509
510static u32 reg_crda_timeouts;
511
512static void crda_timeout_work(struct work_struct *work);
513static DECLARE_DELAYED_WORK(crda_timeout, crda_timeout_work);
514
515static void crda_timeout_work(struct work_struct *work)
516{
c799ba6e 517 pr_debug("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
b6863036
JB		 518 rtnl_lock();
519 reg_crda_timeouts++;
e646a025 520 restore_regulatory_settings(true, false);
b6863036
JB		 521 rtnl_unlock();
522}
523
524static void cancel_crda_timeout(void)
525{
526 cancel_delayed_work(&crda_timeout);
527}
528
529static void cancel_crda_timeout_sync(void)
530{
531 cancel_delayed_work_sync(&crda_timeout);
532}
533
534static void reset_crda_timeouts(void)
535{
536 reg_crda_timeouts = 0;
537}
538
fb1fc7ad
LR		 539/*
540 * This lets us keep regulatory code which is updated on a regulatory
1226d258 541 * basis in userspace.
fb1fc7ad 542 */
b2e1b302
LR		 543static int call_crda(const char *alpha2)
544{
1226d258
JB		 545 char country[12];
546 char *env[] = { country, NULL };
c7d319e5 547 int ret;
1226d258
JB		 548
549 snprintf(country, sizeof(country), "COUNTRY=%c%c",
550 alpha2[0], alpha2[1]);
551
c37722bd 552 if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) {
042ab5fc 553 pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n");
c37722bd
I		 554 return -EINVAL;
555 }
556
b2e1b302 557 if (!is_world_regdom((char *) alpha2))
042ab5fc 558 pr_debug("Calling CRDA for country: %c%c\n",
c799ba6e 559 alpha2[0], alpha2[1]);
b2e1b302 560 else
042ab5fc 561 pr_debug("Calling CRDA to update world regulatory domain\n");
b2e1b302 562
c7d319e5
JB		 563 ret = kobject_uevent_env(&reg_pdev->dev.kobj, KOBJ_CHANGE, env);
564 if (ret)
565 return ret;
566
567 queue_delayed_work(system_power_efficient_wq,
b6863036 568 &crda_timeout, msecs_to_jiffies(3142));
c7d319e5 569 return 0;
b2e1b302 570}
b6863036
JB		 571#else
572static inline void cancel_crda_timeout(void) {}
573static inline void cancel_crda_timeout_sync(void) {}
574static inline void reset_crda_timeouts(void) {}
575static inline int call_crda(const char *alpha2)
576{
577 return -ENODATA;
578}
579#endif /* CONFIG_CFG80211_CRDA_SUPPORT */
b2e1b302 580
007f6c5e
JB		 581/* code to directly load a firmware database through request_firmware */
582static const struct fwdb_header *regdb;
583
584struct fwdb_country {
585 u8 alpha2[2];
586 __be16 coll_ptr;
587 /* this struct cannot be extended */
588} __packed __aligned(4);
589
590struct fwdb_collection {
591 u8 len;
592 u8 n_rules;
593 u8 dfs_region;
594 /* no optional data yet */
595 /* aligned to 2, then followed by __be16 array of rule pointers */
596} __packed __aligned(4);
597
598enum fwdb_flags {
599 FWDB_FLAG_NO_OFDM = BIT(0),
600 FWDB_FLAG_NO_OUTDOOR = BIT(1),
601 FWDB_FLAG_DFS = BIT(2),
602 FWDB_FLAG_NO_IR = BIT(3),
603 FWDB_FLAG_AUTO_BW = BIT(4),
604};
605
230ebaa1
HD		 606struct fwdb_wmm_ac {
607 u8 ecw;
608 u8 aifsn;
609 __be16 cot;
610} __packed;
611
612struct fwdb_wmm_rule {
613 struct fwdb_wmm_ac client[IEEE80211_NUM_ACS];
614 struct fwdb_wmm_ac ap[IEEE80211_NUM_ACS];
615} __packed;
616
007f6c5e
JB		 617struct fwdb_rule {
618 u8 len;
619 u8 flags;
620 __be16 max_eirp;
621 __be32 start, end, max_bw;
622 /* start of optional data */
623 __be16 cac_timeout;
230ebaa1 624 __be16 wmm_ptr;
007f6c5e
JB		 625} __packed __aligned(4);
626
627#define FWDB_MAGIC 0x52474442
628#define FWDB_VERSION 20
629
630struct fwdb_header {
631 __be32 magic;
632 __be32 version;
633 struct fwdb_country country[];
634} __packed __aligned(4);
635
230ebaa1
HD		 636static int ecw2cw(int ecw)
637{
638 return (1 << ecw) - 1;
639}
640
641static bool valid_wmm(struct fwdb_wmm_rule *rule)
642{
643 struct fwdb_wmm_ac *ac = (struct fwdb_wmm_ac *)rule;
644 int i;
645
646 for (i = 0; i < IEEE80211_NUM_ACS * 2; i++) {
647 u16 cw_min = ecw2cw((ac[i].ecw & 0xf0) >> 4);
648 u16 cw_max = ecw2cw(ac[i].ecw & 0x0f);
649 u8 aifsn = ac[i].aifsn;
650
651 if (cw_min >= cw_max)
652 return false;
653
654 if (aifsn < 1)
655 return false;
656 }
657
658 return true;
659}
660
007f6c5e
JB		 661static bool valid_rule(const u8 *data, unsigned int size, u16 rule_ptr)
662{
663 struct fwdb_rule *rule = (void *)(data + (rule_ptr << 2));
664
665 if ((u8 *)rule + sizeof(rule->len) > data + size)
666 return false;
667
668 /* mandatory fields */
669 if (rule->len < offsetofend(struct fwdb_rule, max_bw))
670 return false;
230ebaa1
HD		 671 if (rule->len >= offsetofend(struct fwdb_rule, wmm_ptr)) {
672 u32 wmm_ptr = be16_to_cpu(rule->wmm_ptr) << 2;
673 struct fwdb_wmm_rule *wmm;
674
675 if (wmm_ptr + sizeof(struct fwdb_wmm_rule) > size)
676 return false;
007f6c5e 677
230ebaa1
HD		 678 wmm = (void *)(data + wmm_ptr);
679
680 if (!valid_wmm(wmm))
681 return false;
682 }
007f6c5e
JB		 683 return true;
684}
685
686static bool valid_country(const u8 *data, unsigned int size,
687 const struct fwdb_country *country)
688{
689 unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
690 struct fwdb_collection *coll = (void *)(data + ptr);
691 __be16 *rules_ptr;
692 unsigned int i;
693
694 /* make sure we can read len/n_rules */
695 if ((u8 *)coll + offsetofend(typeof(*coll), n_rules) > data + size)
696 return false;
697
698 /* make sure base struct and all rules fit */
699 if ((u8 *)coll + ALIGN(coll->len, 2) +
700 (coll->n_rules * 2) > data + size)
701 return false;
702
703 /* mandatory fields must exist */
704 if (coll->len < offsetofend(struct fwdb_collection, dfs_region))
705 return false;
706
707 rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
708
709 for (i = 0; i < coll->n_rules; i++) {
710 u16 rule_ptr = be16_to_cpu(rules_ptr[i]);
711
712 if (!valid_rule(data, size, rule_ptr))
713 return false;
714 }
715
716 return true;
717}
718
90a53e44
JB		 719#ifdef CONFIG_CFG80211_REQUIRE_SIGNED_REGDB
720static struct key *builtin_regdb_keys;
721
722static void __init load_keys_from_buffer(const u8 *p, unsigned int buflen)
723{
724 const u8 *end = p + buflen;
725 size_t plen;
726 key_ref_t key;
727
728 while (p < end) {
729 /* Each cert begins with an ASN.1 SEQUENCE tag and must be more
730 * than 256 bytes in size.
731 */
732 if (end - p < 4)
733 goto dodgy_cert;
734 if (p[0] != 0x30 &&
735 p[1] != 0x82)
736 goto dodgy_cert;
737 plen = (p[2] << 8) | p[3];
738 plen += 4;
739 if (plen > end - p)
740 goto dodgy_cert;
741
742 key = key_create_or_update(make_key_ref(builtin_regdb_keys, 1),
743 "asymmetric", NULL, p, plen,
028db3e2
LT		 744 ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
745 KEY_USR_VIEW | KEY_USR_READ),
90a53e44
JB		 746 KEY_ALLOC_NOT_IN_QUOTA |
747 KEY_ALLOC_BUILT_IN |
748 KEY_ALLOC_BYPASS_RESTRICTION);
749 if (IS_ERR(key)) {
750 pr_err("Problem loading in-kernel X.509 certificate (%ld)\n",
751 PTR_ERR(key));
752 } else {
753 pr_notice("Loaded X.509 cert '%s'\n",
754 key_ref_to_ptr(key)->description);
755 key_ref_put(key);
756 }
757 p += plen;
758 }
759
760 return;
761
762dodgy_cert:
763 pr_err("Problem parsing in-kernel X.509 certificate list\n");
764}
765
766static int __init load_builtin_regdb_keys(void)
767{
768 builtin_regdb_keys =
769 keyring_alloc(".builtin_regdb_keys",
770 KUIDT_INIT(0), KGIDT_INIT(0), current_cred(),
028db3e2
LT		 771 ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
772 KEY_USR_VIEW | KEY_USR_READ | KEY_USR_SEARCH),
90a53e44
JB		 773 KEY_ALLOC_NOT_IN_QUOTA, NULL, NULL);
774 if (IS_ERR(builtin_regdb_keys))
775 return PTR_ERR(builtin_regdb_keys);
776
777 pr_notice("Loading compiled-in X.509 certificates for regulatory database\n");
778
779#ifdef CONFIG_CFG80211_USE_KERNEL_REGDB_KEYS
780 load_keys_from_buffer(shipped_regdb_certs, shipped_regdb_certs_len);
781#endif
88230ef1 782#ifdef CONFIG_CFG80211_EXTRA_REGDB_KEYDIR
90a53e44
JB		 783 if (CONFIG_CFG80211_EXTRA_REGDB_KEYDIR[0] != '\0')
784 load_keys_from_buffer(extra_regdb_certs, extra_regdb_certs_len);
785#endif
786
787 return 0;
788}
789
790static bool regdb_has_valid_signature(const u8 *data, unsigned int size)
791{
792 const struct firmware *sig;
793 bool result;
794
795 if (request_firmware(&sig, "regulatory.db.p7s", &reg_pdev->dev))
796 return false;
797
798 result = verify_pkcs7_signature(data, size, sig->data, sig->size,
799 builtin_regdb_keys,
800 VERIFYING_UNSPECIFIED_SIGNATURE,
801 NULL, NULL) == 0;
802
803 release_firmware(sig);
804
805 return result;
806}
807
808static void free_regdb_keyring(void)
809{
810 key_put(builtin_regdb_keys);
811}
812#else
813static int load_builtin_regdb_keys(void)
814{
815 return 0;
816}
817
818static bool regdb_has_valid_signature(const u8 *data, unsigned int size)
819{
820 return true;
821}
822
823static void free_regdb_keyring(void)
824{
825}
826#endif /* CONFIG_CFG80211_REQUIRE_SIGNED_REGDB */
827
007f6c5e
JB		 828static bool valid_regdb(const u8 *data, unsigned int size)
829{
830 const struct fwdb_header *hdr = (void *)data;
831 const struct fwdb_country *country;
832
833 if (size < sizeof(*hdr))
834 return false;
835
836 if (hdr->magic != cpu_to_be32(FWDB_MAGIC))
837 return false;
838
839 if (hdr->version != cpu_to_be32(FWDB_VERSION))
840 return false;
841
90a53e44
JB		 842 if (!regdb_has_valid_signature(data, size))
843 return false;
844
007f6c5e
JB		 845 country = &hdr->country[0];
846 while ((u8 *)(country + 1) <= data + size) {
847 if (!country->coll_ptr)
848 break;
849 if (!valid_country(data, size, country))
850 return false;
851 country++;
852 }
853
854 return true;
855}
856
014f5a25
SG		 857static void set_wmm_rule(const struct fwdb_header *db,
858 const struct fwdb_country *country,
859 const struct fwdb_rule *rule,
860 struct ieee80211_reg_rule *rrule)
861{
862 struct ieee80211_wmm_rule *wmm_rule = &rrule->wmm_rule;
863 struct fwdb_wmm_rule *wmm;
864 unsigned int i, wmm_ptr;
865
866 wmm_ptr = be16_to_cpu(rule->wmm_ptr) << 2;
867 wmm = (void *)((u8 *)db + wmm_ptr);
868
869 if (!valid_wmm(wmm)) {
870 pr_err("Invalid regulatory WMM rule %u-%u in domain %c%c\n",
871 be32_to_cpu(rule->start), be32_to_cpu(rule->end),
872 country->alpha2[0], country->alpha2[1]);
873 return;
874 }
230ebaa1
HD		 875
876 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
014f5a25 877 wmm_rule->client[i].cw_min =
230ebaa1 878 ecw2cw((wmm->client[i].ecw & 0xf0) >> 4);
014f5a25
SG		 879 wmm_rule->client[i].cw_max = ecw2cw(wmm->client[i].ecw & 0x0f);
880 wmm_rule->client[i].aifsn = wmm->client[i].aifsn;
881 wmm_rule->client[i].cot =
882 1000 * be16_to_cpu(wmm->client[i].cot);
883 wmm_rule->ap[i].cw_min = ecw2cw((wmm->ap[i].ecw & 0xf0) >> 4);
884 wmm_rule->ap[i].cw_max = ecw2cw(wmm->ap[i].ecw & 0x0f);
885 wmm_rule->ap[i].aifsn = wmm->ap[i].aifsn;
886 wmm_rule->ap[i].cot = 1000 * be16_to_cpu(wmm->ap[i].cot);
230ebaa1 887 }
38cb87ee
SG		 888
889 rrule->has_wmm = true;
230ebaa1
HD		 890}
891
19d3577e
HD		 892static int __regdb_query_wmm(const struct fwdb_header *db,
893 const struct fwdb_country *country, int freq,
014f5a25 894 struct ieee80211_reg_rule *rrule)
19d3577e
HD		 895{
896 unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
897 struct fwdb_collection *coll = (void *)((u8 *)db + ptr);
898 int i;
899
900 for (i = 0; i < coll->n_rules; i++) {
901 __be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
902 unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2;
014f5a25 903 struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr);
19d3577e 904
014f5a25 905 if (rule->len < offsetofend(struct fwdb_rule, wmm_ptr))
19d3577e
HD		 906 continue;
907
014f5a25
SG		 908 if (freq >= KHZ_TO_MHZ(be32_to_cpu(rule->start)) &&
909 freq <= KHZ_TO_MHZ(be32_to_cpu(rule->end))) {
910 set_wmm_rule(db, country, rule, rrule);
19d3577e
HD		 911 return 0;
912 }
913 }
914
915 return -ENODATA;
916}
917
38cb87ee 918int reg_query_regdb_wmm(char *alpha2, int freq, struct ieee80211_reg_rule *rule)
19d3577e
HD		 919{
920 const struct fwdb_header *hdr = regdb;
921 const struct fwdb_country *country;
922
5247a77c
HD		 923 if (!regdb)
924 return -ENODATA;
925
19d3577e
HD		 926 if (IS_ERR(regdb))
927 return PTR_ERR(regdb);
928
929 country = &hdr->country[0];
930 while (country->coll_ptr) {
931 if (alpha2_equal(alpha2, country->alpha2))
38cb87ee 932 return __regdb_query_wmm(regdb, country, freq, rule);
19d3577e
HD		 933
934 country++;
935 }
936
937 return -ENODATA;
938}
939EXPORT_SYMBOL(reg_query_regdb_wmm);
940
007f6c5e
JB		 941static int regdb_query_country(const struct fwdb_header *db,
942 const struct fwdb_country *country)
943{
944 unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
945 struct fwdb_collection *coll = (void *)((u8 *)db + ptr);
946 struct ieee80211_regdomain *regdom;
9f8c7136 947 unsigned int i;
007f6c5e 948
9f8c7136
GS		 949 regdom = kzalloc(struct_size(regdom, reg_rules, coll->n_rules),
950 GFP_KERNEL);
007f6c5e
JB		 951 if (!regdom)
952 return -ENOMEM;
953
954 regdom->n_reg_rules = coll->n_rules;
955 regdom->alpha2[0] = country->alpha2[0];
956 regdom->alpha2[1] = country->alpha2[1];
957 regdom->dfs_region = coll->dfs_region;
958
959 for (i = 0; i < regdom->n_reg_rules; i++) {
960 __be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
961 unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2;
962 struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr);
963 struct ieee80211_reg_rule *rrule = &regdom->reg_rules[i];
964
965 rrule->freq_range.start_freq_khz = be32_to_cpu(rule->start);
966 rrule->freq_range.end_freq_khz = be32_to_cpu(rule->end);
967 rrule->freq_range.max_bandwidth_khz = be32_to_cpu(rule->max_bw);
968
969 rrule->power_rule.max_antenna_gain = 0;
970 rrule->power_rule.max_eirp = be16_to_cpu(rule->max_eirp);
971
972 rrule->flags = 0;
973 if (rule->flags & FWDB_FLAG_NO_OFDM)
974 rrule->flags |= NL80211_RRF_NO_OFDM;
975 if (rule->flags & FWDB_FLAG_NO_OUTDOOR)
976 rrule->flags |= NL80211_RRF_NO_OUTDOOR;
977 if (rule->flags & FWDB_FLAG_DFS)
978 rrule->flags |= NL80211_RRF_DFS;
979 if (rule->flags & FWDB_FLAG_NO_IR)
980 rrule->flags |= NL80211_RRF_NO_IR;
981 if (rule->flags & FWDB_FLAG_AUTO_BW)
982 rrule->flags |= NL80211_RRF_AUTO_BW;
983
984 rrule->dfs_cac_ms = 0;
985
986 /* handle optional data */
987 if (rule->len >= offsetofend(struct fwdb_rule, cac_timeout))
988 rrule->dfs_cac_ms =
989 1000 * be16_to_cpu(rule->cac_timeout);
014f5a25
SG		 990 if (rule->len >= offsetofend(struct fwdb_rule, wmm_ptr))
991 set_wmm_rule(db, country, rule, rrule);
007f6c5e
JB		 992 }
993
994 return reg_schedule_apply(regdom);
995}
996
997static int query_regdb(const char *alpha2)
998{
999 const struct fwdb_header *hdr = regdb;
1000 const struct fwdb_country *country;
1001
1ea4ff3e
JB		 1002 ASSERT_RTNL();
1003
007f6c5e
JB		 1004 if (IS_ERR(regdb))
1005 return PTR_ERR(regdb);
1006
1007 country = &hdr->country[0];
1008 while (country->coll_ptr) {
1009 if (alpha2_equal(alpha2, country->alpha2))
1010 return regdb_query_country(regdb, country);
1011 country++;
1012 }
1013
1014 return -ENODATA;
1015}
1016
1017static void regdb_fw_cb(const struct firmware *fw, void *context)
1018{
1ea4ff3e
JB		 1019 int set_error = 0;
1020 bool restore = true;
007f6c5e
JB		 1021 void *db;
1022
1023 if (!fw) {
1024 pr_info("failed to load regulatory.db\n");
1ea4ff3e
JB		 1025 set_error = -ENODATA;
1026 } else if (!valid_regdb(fw->data, fw->size)) {
90a53e44 1027 pr_info("loaded regulatory.db is malformed or signature is missing/invalid\n");
1ea4ff3e 1028 set_error = -EINVAL;
007f6c5e
JB		 1029 }
1030
1ea4ff3e 1031 rtnl_lock();
faae54ad
CT		 1032 if (regdb && !IS_ERR(regdb)) {
1033 /* negative case - a bug
1034 * positive case - can happen due to race in case of multiple cb's in
1035 * queue, due to usage of asynchronous callback
1036 *
1037 * Either case, just restore and free new db.
1038 */
1ea4ff3e
JB		 1039 } else if (set_error) {
1040 regdb = ERR_PTR(set_error);
1041 } else if (fw) {
1042 db = kmemdup(fw->data, fw->size, GFP_KERNEL);
1043 if (db) {
1044 regdb = db;
1045 restore = context && query_regdb(context);
1046 } else {
1047 restore = true;
1048 }
007f6c5e
JB		 1049 }
1050
1ea4ff3e 1051 if (restore)
e646a025 1052 restore_regulatory_settings(true, false);
007f6c5e 1053
007f6c5e 1054 rtnl_unlock();
1ea4ff3e 1055
007f6c5e 1056 kfree(context);
1ea4ff3e
JB		 1057
1058 release_firmware(fw);
007f6c5e
JB		 1059}
1060
1061static int query_regdb_file(const char *alpha2)
1062{
1ea4ff3e
JB		 1063 ASSERT_RTNL();
1064
007f6c5e
JB		 1065 if (regdb)
1066 return query_regdb(alpha2);
1067
1068 alpha2 = kmemdup(alpha2, 2, GFP_KERNEL);
1069 if (!alpha2)
1070 return -ENOMEM;
1071
1072 return request_firmware_nowait(THIS_MODULE, true, "regulatory.db",
1073 &reg_pdev->dev, GFP_KERNEL,
1074 (void *)alpha2, regdb_fw_cb);
1075}
1076
1ea4ff3e
JB		 1077int reg_reload_regdb(void)
1078{
1079 const struct firmware *fw;
1080 void *db;
1081 int err;
1082
1083 err = request_firmware(&fw, "regulatory.db", &reg_pdev->dev);
1084 if (err)
1085 return err;
1086
1087 if (!valid_regdb(fw->data, fw->size)) {
1088 err = -ENODATA;
1089 goto out;
1090 }
1091
1092 db = kmemdup(fw->data, fw->size, GFP_KERNEL);
1093 if (!db) {
1094 err = -ENOMEM;
1095 goto out;
1096 }
1097
1098 rtnl_lock();
1099 if (!IS_ERR_OR_NULL(regdb))
1100 kfree(regdb);
1101 regdb = db;
1102 rtnl_unlock();
1103
1104 out:
1105 release_firmware(fw);
1106 return err;
1107}
1108
cecbb069 1109static bool reg_query_database(struct regulatory_request *request)
fe6631ff 1110{
007f6c5e
JB		 1111 if (query_regdb_file(request->alpha2) == 0)
1112 return true;
1113
c7d319e5
JB		 1114 if (call_crda(request->alpha2) == 0)
1115 return true;
1116
1117 return false;
fe6631ff
LR		 1118}
1119
e438768f 1120bool reg_is_valid_request(const char *alpha2)
b2e1b302 1121{
c492db37 1122 struct regulatory_request *lr = get_last_request();
61405e97 1123
c492db37 1124 if (!lr || lr->processed)
f6037d09
JB		 1125 return false;
1126
c492db37 1127 return alpha2_equal(lr->alpha2, alpha2);
b2e1b302 1128}
8318d78a 1129
e3961af1
JD		 1130static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy)
1131{
1132 struct regulatory_request *lr = get_last_request();
1133
1134 /*
1135 * Follow the driver's regulatory domain, if present, unless a country
1136 * IE has been processed or a user wants to help complaince further
1137 */
1138 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1139 lr->initiator != NL80211_REGDOM_SET_BY_USER &&
1140 wiphy->regd)
1141 return get_wiphy_regdom(wiphy);
1142
1143 return get_cfg80211_regdom();
1144}
1145
a6d4a534
AN		 1146static unsigned int
1147reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd,
1148 const struct ieee80211_reg_rule *rule)
97524820
JD		 1149{
1150 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
1151 const struct ieee80211_freq_range *freq_range_tmp;
1152 const struct ieee80211_reg_rule *tmp;
1153 u32 start_freq, end_freq, idx, no;
1154
1155 for (idx = 0; idx < rd->n_reg_rules; idx++)
1156 if (rule == &rd->reg_rules[idx])
1157 break;
1158
1159 if (idx == rd->n_reg_rules)
1160 return 0;
1161
1162 /* get start_freq */
1163 no = idx;
1164
1165 while (no) {
1166 tmp = &rd->reg_rules[--no];
1167 freq_range_tmp = &tmp->freq_range;
1168
1169 if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz)
1170 break;
1171
97524820
JD		 1172 freq_range = freq_range_tmp;
1173 }
1174
1175 start_freq = freq_range->start_freq_khz;
1176
1177 /* get end_freq */
1178 freq_range = &rule->freq_range;
1179 no = idx;
1180
1181 while (no < rd->n_reg_rules - 1) {
1182 tmp = &rd->reg_rules[++no];
1183 freq_range_tmp = &tmp->freq_range;
1184
1185 if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz)
1186 break;
1187
97524820
JD		 1188 freq_range = freq_range_tmp;
1189 }
1190
1191 end_freq = freq_range->end_freq_khz;
1192
1193 return end_freq - start_freq;
1194}
1195
a6d4a534
AN		 1196unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd,
1197 const struct ieee80211_reg_rule *rule)
1198{
1199 unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule);
1200
1201 if (rule->flags & NL80211_RRF_NO_160MHZ)
1202 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80));
1203 if (rule->flags & NL80211_RRF_NO_80MHZ)
1204 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40));
1205
1206 /*
1207 * HT40+/HT40- limits are handled per-channel. Only limit BW if both
1208 * are not allowed.
1209 */
1210 if (rule->flags & NL80211_RRF_NO_HT40MINUS &&
1211 rule->flags & NL80211_RRF_NO_HT40PLUS)
1212 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20));
1213
1214 return bw;
1215}
1216
b2e1b302 1217/* Sanity check on a regulatory rule */
a3d2eaf0 1218static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
8318d78a 1219{
a3d2eaf0 1220 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
b2e1b302
LR		 1221 u32 freq_diff;
1222
91e99004 1223 if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0)
b2e1b302
LR		 1224 return false;
1225
1226 if (freq_range->start_freq_khz > freq_range->end_freq_khz)
1227 return false;
1228
1229 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
1230
bd05f28e 1231 if (freq_range->end_freq_khz <= freq_range->start_freq_khz ||
1a919318 1232 freq_range->max_bandwidth_khz > freq_diff)
b2e1b302
LR		 1233 return false;
1234
1235 return true;
1236}
1237
a3d2eaf0 1238static bool is_valid_rd(const struct ieee80211_regdomain *rd)
b2e1b302 1239{
a3d2eaf0 1240 const struct ieee80211_reg_rule *reg_rule = NULL;
b2e1b302 1241 unsigned int i;
8318d78a 1242
b2e1b302
LR		 1243 if (!rd->n_reg_rules)
1244 return false;
8318d78a 1245
88dc1c3f
LR		 1246 if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES))
1247 return false;
1248
b2e1b302
LR		 1249 for (i = 0; i < rd->n_reg_rules; i++) {
1250 reg_rule = &rd->reg_rules[i];
1251 if (!is_valid_reg_rule(reg_rule))
1252 return false;
1253 }
1254
1255 return true;
8318d78a
JB		 1256}
1257
0c7dc45d
LR		 1258/**
1259 * freq_in_rule_band - tells us if a frequency is in a frequency band
1260 * @freq_range: frequency rule we want to query
1261 * @freq_khz: frequency we are inquiring about
1262 *
1263 * This lets us know if a specific frequency rule is or is not relevant to
1264 * a specific frequency's band. Bands are device specific and artificial
64629b9d
VK		 1265 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
1266 * however it is safe for now to assume that a frequency rule should not be
1267 * part of a frequency's band if the start freq or end freq are off by more
93183bdb 1268 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 20 GHz for the
64629b9d 1269 * 60 GHz band.
0c7dc45d
LR		 1270 * This resolution can be lowered and should be considered as we add
1271 * regulatory rule support for other "bands".
1272 **/
1273static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
1a919318 1274 u32 freq_khz)
0c7dc45d
LR		 1275{
1276#define ONE_GHZ_IN_KHZ 1000000
64629b9d
VK		 1277 /*
1278 * From 802.11ad: directional multi-gigabit (DMG):
1279 * Pertaining to operation in a frequency band containing a channel
1280 * with the Channel starting frequency above 45 GHz.
1281 */
1282 u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ?
93183bdb 1283 20 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ;
64629b9d 1284 if (abs(freq_khz - freq_range->start_freq_khz) <= limit)
0c7dc45d 1285 return true;
64629b9d 1286 if (abs(freq_khz - freq_range->end_freq_khz) <= limit)
0c7dc45d
LR		 1287 return true;
1288 return false;
1289#undef ONE_GHZ_IN_KHZ
1290}
1291
adbfb058
LR		 1292/*
1293 * Later on we can perhaps use the more restrictive DFS
1294 * region but we don't have information for that yet so
1295 * for now simply disallow conflicts.
1296 */
1297static enum nl80211_dfs_regions
1298reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1,
1299 const enum nl80211_dfs_regions dfs_region2)
1300{
1301 if (dfs_region1 != dfs_region2)
1302 return NL80211_DFS_UNSET;
1303 return dfs_region1;
1304}
1305
08a75a88
IP		 1306static void reg_wmm_rules_intersect(const struct ieee80211_wmm_ac *wmm_ac1,
1307 const struct ieee80211_wmm_ac *wmm_ac2,
1308 struct ieee80211_wmm_ac *intersect)
1309{
1310 intersect->cw_min = max_t(u16, wmm_ac1->cw_min, wmm_ac2->cw_min);
1311 intersect->cw_max = max_t(u16, wmm_ac1->cw_max, wmm_ac2->cw_max);
1312 intersect->cot = min_t(u16, wmm_ac1->cot, wmm_ac2->cot);
1313 intersect->aifsn = max_t(u8, wmm_ac1->aifsn, wmm_ac2->aifsn);
1314}
1315
fb1fc7ad
LR		 1316/*
1317 * Helper for regdom_intersect(), this does the real
1318 * mathematical intersection fun
1319 */
97524820
JD		 1320static int reg_rules_intersect(const struct ieee80211_regdomain *rd1,
1321 const struct ieee80211_regdomain *rd2,
1322 const struct ieee80211_reg_rule *rule1,
1a919318
JB		 1323 const struct ieee80211_reg_rule *rule2,
1324 struct ieee80211_reg_rule *intersected_rule)
9c96477d
LR		 1325{
1326 const struct ieee80211_freq_range *freq_range1, *freq_range2;
1327 struct ieee80211_freq_range *freq_range;
1328 const struct ieee80211_power_rule *power_rule1, *power_rule2;
1329 struct ieee80211_power_rule *power_rule;
08a75a88
IP		 1330 const struct ieee80211_wmm_rule *wmm_rule1, *wmm_rule2;
1331 struct ieee80211_wmm_rule *wmm_rule;
97524820 1332 u32 freq_diff, max_bandwidth1, max_bandwidth2;
9c96477d
LR		 1333
1334 freq_range1 = &rule1->freq_range;
1335 freq_range2 = &rule2->freq_range;
1336 freq_range = &intersected_rule->freq_range;
1337
1338 power_rule1 = &rule1->power_rule;
1339 power_rule2 = &rule2->power_rule;
1340 power_rule = &intersected_rule->power_rule;
1341
08a75a88
IP		 1342 wmm_rule1 = &rule1->wmm_rule;
1343 wmm_rule2 = &rule2->wmm_rule;
1344 wmm_rule = &intersected_rule->wmm_rule;
1345
9c96477d 1346 freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
1a919318 1347 freq_range2->start_freq_khz);
9c96477d 1348 freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
1a919318 1349 freq_range2->end_freq_khz);
97524820
JD		 1350
1351 max_bandwidth1 = freq_range1->max_bandwidth_khz;
1352 max_bandwidth2 = freq_range2->max_bandwidth_khz;
1353
b0dfd2ea
JD		 1354 if (rule1->flags & NL80211_RRF_AUTO_BW)
1355 max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1);
1356 if (rule2->flags & NL80211_RRF_AUTO_BW)
1357 max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2);
97524820
JD		 1358
1359 freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2);
9c96477d 1360
b0dfd2ea
JD		 1361 intersected_rule->flags = rule1->flags | rule2->flags;
1362
1363 /*
1364 * In case NL80211_RRF_AUTO_BW requested for both rules
1365 * set AUTO_BW in intersected rule also. Next we will
1366 * calculate BW correctly in handle_channel function.
1367 * In other case remove AUTO_BW flag while we calculate
1368 * maximum bandwidth correctly and auto calculation is
1369 * not required.
1370 */
1371 if ((rule1->flags & NL80211_RRF_AUTO_BW) &&
1372 (rule2->flags & NL80211_RRF_AUTO_BW))
1373 intersected_rule->flags |= NL80211_RRF_AUTO_BW;
1374 else
1375 intersected_rule->flags &= ~NL80211_RRF_AUTO_BW;
1376
9c96477d
LR		 1377 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
1378 if (freq_range->max_bandwidth_khz > freq_diff)
1379 freq_range->max_bandwidth_khz = freq_diff;
1380
1381 power_rule->max_eirp = min(power_rule1->max_eirp,
1382 power_rule2->max_eirp);
1383 power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
1384 power_rule2->max_antenna_gain);
1385
089027e5
JD		 1386 intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms,
1387 rule2->dfs_cac_ms);
1388
08a75a88
IP		 1389 if (rule1->has_wmm && rule2->has_wmm) {
1390 u8 ac;
1391
1392 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1393 reg_wmm_rules_intersect(&wmm_rule1->client[ac],
1394 &wmm_rule2->client[ac],
1395 &wmm_rule->client[ac]);
1396 reg_wmm_rules_intersect(&wmm_rule1->ap[ac],
1397 &wmm_rule2->ap[ac],
1398 &wmm_rule->ap[ac]);
1399 }
1400
1401 intersected_rule->has_wmm = true;
1402 } else if (rule1->has_wmm) {
1403 *wmm_rule = *wmm_rule1;
1404 intersected_rule->has_wmm = true;
1405 } else if (rule2->has_wmm) {
1406 *wmm_rule = *wmm_rule2;
1407 intersected_rule->has_wmm = true;
1408 } else {
1409 intersected_rule->has_wmm = false;
1410 }
1411
9c96477d
LR		 1412 if (!is_valid_reg_rule(intersected_rule))
1413 return -EINVAL;
1414
1415 return 0;
1416}
1417
a62a1aed
EP		 1418/* check whether old rule contains new rule */
1419static bool rule_contains(struct ieee80211_reg_rule *r1,
1420 struct ieee80211_reg_rule *r2)
1421{
1422 /* for simplicity, currently consider only same flags */
1423 if (r1->flags != r2->flags)
1424 return false;
1425
1426 /* verify r1 is more restrictive */
1427 if ((r1->power_rule.max_antenna_gain >
1428 r2->power_rule.max_antenna_gain) ||
1429 r1->power_rule.max_eirp > r2->power_rule.max_eirp)
1430 return false;
1431
1432 /* make sure r2's range is contained within r1 */
1433 if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz ||
1434 r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz)
1435 return false;
1436
1437 /* and finally verify that r1.max_bw >= r2.max_bw */
1438 if (r1->freq_range.max_bandwidth_khz <
1439 r2->freq_range.max_bandwidth_khz)
1440 return false;
1441
1442 return true;
1443}
1444
1445/* add or extend current rules. do nothing if rule is already contained */
1446static void add_rule(struct ieee80211_reg_rule *rule,
1447 struct ieee80211_reg_rule *reg_rules, u32 *n_rules)
1448{
1449 struct ieee80211_reg_rule *tmp_rule;
1450 int i;
1451
1452 for (i = 0; i < *n_rules; i++) {
1453 tmp_rule = &reg_rules[i];
1454 /* rule is already contained - do nothing */
1455 if (rule_contains(tmp_rule, rule))
1456 return;
1457
1458 /* extend rule if possible */
1459 if (rule_contains(rule, tmp_rule)) {
1460 memcpy(tmp_rule, rule, sizeof(*rule));
1461 return;
1462 }
1463 }
1464
1465 memcpy(&reg_rules[*n_rules], rule, sizeof(*rule));
1466 (*n_rules)++;
1467}
1468
9c96477d
LR		 1469/**
1470 * regdom_intersect - do the intersection between two regulatory domains
1471 * @rd1: first regulatory domain
1472 * @rd2: second regulatory domain
1473 *
1474 * Use this function to get the intersection between two regulatory domains.
1475 * Once completed we will mark the alpha2 for the rd as intersected, "98",
1476 * as no one single alpha2 can represent this regulatory domain.
1477 *
1478 * Returns a pointer to the regulatory domain structure which will hold the
1479 * resulting intersection of rules between rd1 and rd2. We will
1480 * kzalloc() this structure for you.
1481 */
1a919318
JB		 1482static struct ieee80211_regdomain *
1483regdom_intersect(const struct ieee80211_regdomain *rd1,
1484 const struct ieee80211_regdomain *rd2)
9c96477d 1485{
9f8c7136 1486 int r;
9c96477d 1487 unsigned int x, y;
a62a1aed 1488 unsigned int num_rules = 0;
9c96477d 1489 const struct ieee80211_reg_rule *rule1, *rule2;
a62a1aed 1490 struct ieee80211_reg_rule intersected_rule;
9c96477d 1491 struct ieee80211_regdomain *rd;
9c96477d
LR		 1492
1493 if (!rd1 || !rd2)
1494 return NULL;
1495
fb1fc7ad
LR		 1496 /*
1497 * First we get a count of the rules we'll need, then we actually
9c96477d
LR		 1498 * build them. This is to so we can malloc() and free() a
1499 * regdomain once. The reason we use reg_rules_intersect() here
1500 * is it will return -EINVAL if the rule computed makes no sense.
fb1fc7ad
LR		 1501 * All rules that do check out OK are valid.
1502 */
9c96477d
LR		 1503
1504 for (x = 0; x < rd1->n_reg_rules; x++) {
1505 rule1 = &rd1->reg_rules[x];
1506 for (y = 0; y < rd2->n_reg_rules; y++) {
1507 rule2 = &rd2->reg_rules[y];
97524820 1508 if (!reg_rules_intersect(rd1, rd2, rule1, rule2,
a62a1aed 1509 &intersected_rule))
9c96477d 1510 num_rules++;
9c96477d
LR		 1511 }
1512 }
1513
1514 if (!num_rules)
1515 return NULL;
1516
9f8c7136 1517 rd = kzalloc(struct_size(rd, reg_rules, num_rules), GFP_KERNEL);
9c96477d
LR		 1518 if (!rd)
1519 return NULL;
1520
a62a1aed 1521 for (x = 0; x < rd1->n_reg_rules; x++) {
9c96477d 1522 rule1 = &rd1->reg_rules[x];
a62a1aed 1523 for (y = 0; y < rd2->n_reg_rules; y++) {
9c96477d 1524 rule2 = &rd2->reg_rules[y];
97524820 1525 r = reg_rules_intersect(rd1, rd2, rule1, rule2,
a62a1aed 1526 &intersected_rule);
fb1fc7ad
LR		 1527 /*
1528 * No need to memset here the intersected rule here as
1529 * we're not using the stack anymore
1530 */
9c96477d
LR		 1531 if (r)
1532 continue;
9c96477d 1533
a62a1aed
EP		 1534 add_rule(&intersected_rule, rd->reg_rules,
1535 &rd->n_reg_rules);
1536 }
9c96477d
LR		 1537 }
1538
9c96477d
LR		 1539 rd->alpha2[0] = '9';
1540 rd->alpha2[1] = '8';
adbfb058
LR		 1541 rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region,
1542 rd2->dfs_region);
9c96477d
LR		 1543
1544 return rd;
1545}
1546
fb1fc7ad
LR		 1547/*
1548 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
1549 * want to just have the channel structure use these
1550 */
b2e1b302
LR		 1551static u32 map_regdom_flags(u32 rd_flags)
1552{
1553 u32 channel_flags = 0;
8fe02e16
LR		 1554 if (rd_flags & NL80211_RRF_NO_IR_ALL)
1555 channel_flags |= IEEE80211_CHAN_NO_IR;
b2e1b302
LR		 1556 if (rd_flags & NL80211_RRF_DFS)
1557 channel_flags |= IEEE80211_CHAN_RADAR;
03f6b084
SF		 1558 if (rd_flags & NL80211_RRF_NO_OFDM)
1559 channel_flags |= IEEE80211_CHAN_NO_OFDM;
570dbde1
DS		 1560 if (rd_flags & NL80211_RRF_NO_OUTDOOR)
1561 channel_flags |= IEEE80211_CHAN_INDOOR_ONLY;
06f207fc
AN		 1562 if (rd_flags & NL80211_RRF_IR_CONCURRENT)
1563 channel_flags |= IEEE80211_CHAN_IR_CONCURRENT;
a6d4a534
AN		 1564 if (rd_flags & NL80211_RRF_NO_HT40MINUS)
1565 channel_flags |= IEEE80211_CHAN_NO_HT40MINUS;
1566 if (rd_flags & NL80211_RRF_NO_HT40PLUS)
1567 channel_flags |= IEEE80211_CHAN_NO_HT40PLUS;
1568 if (rd_flags & NL80211_RRF_NO_80MHZ)
1569 channel_flags |= IEEE80211_CHAN_NO_80MHZ;
1570 if (rd_flags & NL80211_RRF_NO_160MHZ)
1571 channel_flags |= IEEE80211_CHAN_NO_160MHZ;
1e61d82c
HD		 1572 if (rd_flags & NL80211_RRF_NO_HE)
1573 channel_flags |= IEEE80211_CHAN_NO_HE;
b2e1b302
LR		 1574 return channel_flags;
1575}
1576
361c9c8b 1577static const struct ieee80211_reg_rule *
49172874 1578freq_reg_info_regd(u32 center_freq,
4edd5698 1579 const struct ieee80211_regdomain *regd, u32 bw)
8318d78a
JB		 1580{
1581 int i;
0c7dc45d 1582 bool band_rule_found = false;
038659e7
LR		 1583 bool bw_fits = false;
1584
3e0c3ff3 1585 if (!regd)
361c9c8b 1586 return ERR_PTR(-EINVAL);
b2e1b302 1587
3e0c3ff3 1588 for (i = 0; i < regd->n_reg_rules; i++) {
b2e1b302
LR		 1589 const struct ieee80211_reg_rule *rr;
1590 const struct ieee80211_freq_range *fr = NULL;
b2e1b302 1591
3e0c3ff3 1592 rr = &regd->reg_rules[i];
b2e1b302 1593 fr = &rr->freq_range;
0c7dc45d 1594
fb1fc7ad
LR		 1595 /*
1596 * We only need to know if one frequency rule was
cc5a639b 1597 * in center_freq's band, that's enough, so let's
fb1fc7ad
LR		 1598 * not overwrite it once found
1599 */
0c7dc45d
LR		 1600 if (!band_rule_found)
1601 band_rule_found = freq_in_rule_band(fr, center_freq);
1602
4787cfa0 1603 bw_fits = cfg80211_does_bw_fit_range(fr, center_freq, bw);
0c7dc45d 1604
361c9c8b
JB		 1605 if (band_rule_found && bw_fits)
1606 return rr;
8318d78a
JB		 1607 }
1608
0c7dc45d 1609 if (!band_rule_found)
361c9c8b 1610 return ERR_PTR(-ERANGE);
0c7dc45d 1611
361c9c8b 1612 return ERR_PTR(-EINVAL);
b2e1b302
LR		 1613}
1614
8de1c63b
JB		 1615static const struct ieee80211_reg_rule *
1616__freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw)
1fa25e41 1617{
4edd5698
MM		 1618 const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy);
1619 const struct ieee80211_reg_rule *reg_rule = NULL;
1620 u32 bw;
1a919318 1621
4edd5698 1622 for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) {
49172874 1623 reg_rule = freq_reg_info_regd(center_freq, regd, bw);
4edd5698
MM		 1624 if (!IS_ERR(reg_rule))
1625 return reg_rule;
1626 }
5d885b99 1627
4edd5698
MM		 1628 return reg_rule;
1629}
1630
1631const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy,
1632 u32 center_freq)
1633{
1634 return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(20));
1fa25e41 1635}
4f366c5d 1636EXPORT_SYMBOL(freq_reg_info);
b2e1b302 1637
034c6d6e 1638const char *reg_initiator_name(enum nl80211_reg_initiator initiator)
926a0a09
LR		 1639{
1640 switch (initiator) {
1641 case NL80211_REGDOM_SET_BY_CORE:
034c6d6e 1642 return "core";
926a0a09 1643 case NL80211_REGDOM_SET_BY_USER:
034c6d6e 1644 return "user";
926a0a09 1645 case NL80211_REGDOM_SET_BY_DRIVER:
034c6d6e 1646 return "driver";
926a0a09 1647 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
8db0c433 1648 return "country element";
926a0a09
LR		 1649 default:
1650 WARN_ON(1);
034c6d6e 1651 return "bug";
926a0a09
LR		 1652 }
1653}
034c6d6e 1654EXPORT_SYMBOL(reg_initiator_name);
e702d3cf 1655
1aeb135f
MS		 1656static uint32_t reg_rule_to_chan_bw_flags(const struct ieee80211_regdomain *regd,
1657 const struct ieee80211_reg_rule *reg_rule,
1658 const struct ieee80211_channel *chan)
1659{
1660 const struct ieee80211_freq_range *freq_range = NULL;
934f4c7d 1661 u32 max_bandwidth_khz, center_freq_khz, bw_flags = 0;
1aeb135f
MS		 1662
1663 freq_range = &reg_rule->freq_range;
1664
1665 max_bandwidth_khz = freq_range->max_bandwidth_khz;
934f4c7d 1666 center_freq_khz = ieee80211_channel_to_khz(chan);
1aeb135f
MS		 1667 /* Check if auto calculation requested */
1668 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
1669 max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
1670
1671 /* If we get a reg_rule we can assume that at least 5Mhz fit */
4787cfa0 1672 if (!cfg80211_does_bw_fit_range(freq_range,
934f4c7d 1673 center_freq_khz,
4787cfa0 1674 MHZ_TO_KHZ(10)))
1aeb135f 1675 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
4787cfa0 1676 if (!cfg80211_does_bw_fit_range(freq_range,
934f4c7d 1677 center_freq_khz,
4787cfa0 1678 MHZ_TO_KHZ(20)))
1aeb135f
MS		 1679 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1680
1681 if (max_bandwidth_khz < MHZ_TO_KHZ(10))
1682 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1683 if (max_bandwidth_khz < MHZ_TO_KHZ(20))
1684 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1685 if (max_bandwidth_khz < MHZ_TO_KHZ(40))
1686 bw_flags |= IEEE80211_CHAN_NO_HT40;
1687 if (max_bandwidth_khz < MHZ_TO_KHZ(80))
1688 bw_flags |= IEEE80211_CHAN_NO_80MHZ;
1689 if (max_bandwidth_khz < MHZ_TO_KHZ(160))
1690 bw_flags |= IEEE80211_CHAN_NO_160MHZ;
1691 return bw_flags;
1692}
1693
7c9ff7e2
MT		 1694static void handle_channel_single_rule(struct wiphy *wiphy,
1695 enum nl80211_reg_initiator initiator,
1696 struct ieee80211_channel *chan,
1697 u32 flags,
1698 struct regulatory_request *lr,
1699 struct wiphy *request_wiphy,
1700 const struct ieee80211_reg_rule *reg_rule)
1701{
1702 u32 bw_flags = 0;
b2e1b302 1703 const struct ieee80211_power_rule *power_rule = NULL;
97524820 1704 const struct ieee80211_regdomain *regd;
a92a3ce7 1705
b0dfd2ea 1706 regd = reg_get_regdomain(wiphy);
e702d3cf 1707
b2e1b302 1708 power_rule = &reg_rule->power_rule;
1aeb135f 1709 bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
b2e1b302 1710
c492db37 1711 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
806a9e39 1712 request_wiphy && request_wiphy == wiphy &&
a2f73b6c 1713 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
fb1fc7ad 1714 /*
25985edc 1715 * This guarantees the driver's requested regulatory domain
f976376d 1716 * will always be used as a base for further regulatory
fb1fc7ad
LR		 1717 * settings
1718 */
f976376d 1719 chan->flags = chan->orig_flags =
038659e7 1720 map_regdom_flags(reg_rule->flags) | bw_flags;
f976376d
LR		 1721 chan->max_antenna_gain = chan->orig_mag =
1722 (int) MBI_TO_DBI(power_rule->max_antenna_gain);
279f0f55 1723 chan->max_reg_power = chan->max_power = chan->orig_mpwr =
f976376d 1724 (int) MBM_TO_DBM(power_rule->max_eirp);
4f267c11
JD		 1725
1726 if (chan->flags & IEEE80211_CHAN_RADAR) {
1727 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1728 if (reg_rule->dfs_cac_ms)
1729 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1730 }
1731
f976376d
LR		 1732 return;
1733 }
1734
04f39047
SW		 1735 chan->dfs_state = NL80211_DFS_USABLE;
1736 chan->dfs_state_entered = jiffies;
1737
aa3d7eef 1738 chan->beacon_found = false;
038659e7 1739 chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags);
1a919318
JB		 1740 chan->max_antenna_gain =
1741 min_t(int, chan->orig_mag,
1742 MBI_TO_DBI(power_rule->max_antenna_gain));
eccc068e 1743 chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp);
089027e5
JD		 1744
1745 if (chan->flags & IEEE80211_CHAN_RADAR) {
1746 if (reg_rule->dfs_cac_ms)
1747 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1748 else
1749 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1750 }
1751
5e31fc08
SG		 1752 if (chan->orig_mpwr) {
1753 /*
a09a85a0
LR		 1754 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1755 * will always follow the passed country IE power settings.
5e31fc08
SG		 1756 */
1757 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
a09a85a0 1758 wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
5e31fc08
SG		 1759 chan->max_power = chan->max_reg_power;
1760 else
1761 chan->max_power = min(chan->orig_mpwr,
1762 chan->max_reg_power);
1763 } else
1764 chan->max_power = chan->max_reg_power;
8318d78a
JB		 1765}
1766
7c9ff7e2
MT		 1767/* Note that right now we assume the desired channel bandwidth
1768 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
1769 * per channel, the primary and the extension channel).
1770 */
1771static void handle_channel(struct wiphy *wiphy,
1772 enum nl80211_reg_initiator initiator,
1773 struct ieee80211_channel *chan)
1774{
1775 u32 flags = 0;
1776 const struct ieee80211_reg_rule *reg_rule = NULL;
1777 struct wiphy *request_wiphy = NULL;
1778 struct regulatory_request *lr = get_last_request();
1779
1780 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
1781
1782 flags = chan->orig_flags;
1783
1784 reg_rule = freq_reg_info(wiphy, ieee80211_channel_to_khz(chan));
1785 if (IS_ERR(reg_rule)) {
1786 /* We will disable all channels that do not match our
1787 * received regulatory rule unless the hint is coming
1788 * from a Country IE and the Country IE had no information
1789 * about a band. The IEEE 802.11 spec allows for an AP
1790 * to send only a subset of the regulatory rules allowed,
1791 * so an AP in the US that only supports 2.4 GHz may only send
1792 * a country IE with information for the 2.4 GHz band
1793 * while 5 GHz is still supported.
1794 */
1795 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1796 PTR_ERR(reg_rule) == -ERANGE)
1797 return;
1798
1799 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1800 request_wiphy && request_wiphy == wiphy &&
1801 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1802 pr_debug("Disabling freq %d.%03d MHz for good\n",
1803 chan->center_freq, chan->freq_offset);
1804 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
1805 chan->flags = chan->orig_flags;
1806 } else {
1807 pr_debug("Disabling freq %d.%03d MHz\n",
1808 chan->center_freq, chan->freq_offset);
1809 chan->flags |= IEEE80211_CHAN_DISABLED;
1810 }
1811 return;
1812 }
1813
1814 handle_channel_single_rule(wiphy, initiator, chan, flags, lr,
1815 request_wiphy, reg_rule);
1816}
1817
7ca43d03 1818static void handle_band(struct wiphy *wiphy,
fdc9d7b2
JB		 1819 enum nl80211_reg_initiator initiator,
1820 struct ieee80211_supported_band *sband)
8318d78a 1821{
a92a3ce7 1822 unsigned int i;
a92a3ce7 1823
fdc9d7b2
JB		 1824 if (!sband)
1825 return;
8318d78a
JB		 1826
1827 for (i = 0; i < sband->n_channels; i++)
fdc9d7b2 1828 handle_channel(wiphy, initiator, &sband->channels[i]);
8318d78a
JB		 1829}
1830
57b5ce07
LR		 1831static bool reg_request_cell_base(struct regulatory_request *request)
1832{
1833 if (request->initiator != NL80211_REGDOM_SET_BY_USER)
1834 return false;
1a919318 1835 return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE;
57b5ce07
LR		 1836}
1837
1838bool reg_last_request_cell_base(void)
1839{
38fd2143 1840 return reg_request_cell_base(get_last_request());
57b5ce07
LR		 1841}
1842
94fc661f 1843#ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
57b5ce07 1844/* Core specific check */
2f92212b
JB		 1845static enum reg_request_treatment
1846reg_ignore_cell_hint(struct regulatory_request *pending_request)
57b5ce07 1847{
c492db37
JB		 1848 struct regulatory_request *lr = get_last_request();
1849
57b5ce07 1850 if (!reg_num_devs_support_basehint)
2f92212b 1851 return REG_REQ_IGNORE;
57b5ce07 1852
c492db37 1853 if (reg_request_cell_base(lr) &&
1a919318 1854 !regdom_changes(pending_request->alpha2))
2f92212b 1855 return REG_REQ_ALREADY_SET;
1a919318 1856
2f92212b 1857 return REG_REQ_OK;
57b5ce07
LR		 1858}
1859
1860/* Device specific check */
1861static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
1862{
1a919318 1863 return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS);
57b5ce07
LR		 1864}
1865#else
a515de66
JB		 1866static enum reg_request_treatment
1867reg_ignore_cell_hint(struct regulatory_request *pending_request)
57b5ce07 1868{
2f92212b 1869 return REG_REQ_IGNORE;
57b5ce07 1870}
1a919318
JB		 1871
1872static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
57b5ce07
LR		 1873{
1874 return true;
1875}
1876#endif
1877
fa1fb9cb
LR		 1878static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy)
1879{
a2f73b6c
LR		 1880 if (wiphy->regulatory_flags & REGULATORY_STRICT_REG &&
1881 !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG))
fa1fb9cb
LR		 1882 return true;
1883 return false;
1884}
57b5ce07 1885
7db90f4a
LR		 1886static bool ignore_reg_update(struct wiphy *wiphy,
1887 enum nl80211_reg_initiator initiator)
14b9815a 1888{
c492db37
JB		 1889 struct regulatory_request *lr = get_last_request();
1890
b0d7aa59
JD		 1891 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
1892 return true;
1893
c492db37 1894 if (!lr) {
c799ba6e
JB		 1895 pr_debug("Ignoring regulatory request set by %s since last_request is not set\n",
1896 reg_initiator_name(initiator));
14b9815a 1897 return true;
926a0a09
LR		 1898 }
1899
7db90f4a 1900 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
a2f73b6c 1901 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
c799ba6e
JB		 1902 pr_debug("Ignoring regulatory request set by %s since the driver uses its own custom regulatory domain\n",
1903 reg_initiator_name(initiator));
14b9815a 1904 return true;
926a0a09
LR		 1905 }
1906
fb1fc7ad
LR		 1907 /*
1908 * wiphy->regd will be set once the device has its own
1909 * desired regulatory domain set
1910 */
fa1fb9cb 1911 if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd &&
749b527b 1912 initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
c492db37 1913 !is_world_regdom(lr->alpha2)) {
c799ba6e
JB		 1914 pr_debug("Ignoring regulatory request set by %s since the driver requires its own regulatory domain to be set first\n",
1915 reg_initiator_name(initiator));
14b9815a 1916 return true;
926a0a09
LR		 1917 }
1918
c492db37 1919 if (reg_request_cell_base(lr))
57b5ce07
LR		 1920 return reg_dev_ignore_cell_hint(wiphy);
1921
14b9815a
LR		 1922 return false;
1923}
1924
3195e489
LR		 1925static bool reg_is_world_roaming(struct wiphy *wiphy)
1926{
1927 const struct ieee80211_regdomain *cr = get_cfg80211_regdom();
1928 const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy);
1929 struct regulatory_request *lr = get_last_request();
1930
1931 if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2)))
1932 return true;
1933
1934 if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
a2f73b6c 1935 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
3195e489
LR		 1936 return true;
1937
1938 return false;
1939}
1940
1a919318 1941static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx,
e38f8a7a
LR		 1942 struct reg_beacon *reg_beacon)
1943{
e38f8a7a
LR		 1944 struct ieee80211_supported_band *sband;
1945 struct ieee80211_channel *chan;
6bad8766
LR		 1946 bool channel_changed = false;
1947 struct ieee80211_channel chan_before;
e38f8a7a 1948
e38f8a7a
LR		 1949 sband = wiphy->bands[reg_beacon->chan.band];
1950 chan = &sband->channels[chan_idx];
1951
934f4c7d 1952 if (likely(!ieee80211_channel_equal(chan, &reg_beacon->chan)))
e38f8a7a
LR		 1953 return;
1954
6bad8766
LR		 1955 if (chan->beacon_found)
1956 return;
1957
1958 chan->beacon_found = true;
1959
0f500a5f
LR		 1960 if (!reg_is_world_roaming(wiphy))
1961 return;
1962
a2f73b6c 1963 if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS)
37184244
LR		 1964 return;
1965
a48a52b7 1966 chan_before = *chan;
6bad8766 1967
8fe02e16
LR		 1968 if (chan->flags & IEEE80211_CHAN_NO_IR) {
1969 chan->flags &= ~IEEE80211_CHAN_NO_IR;
6bad8766 1970 channel_changed = true;
e38f8a7a
LR		 1971 }
1972
6bad8766
LR		 1973 if (channel_changed)
1974 nl80211_send_beacon_hint_event(wiphy, &chan_before, chan);
e38f8a7a
LR		 1975}
1976
1977/*
1978 * Called when a scan on a wiphy finds a beacon on
1979 * new channel
1980 */
1981static void wiphy_update_new_beacon(struct wiphy *wiphy,
1982 struct reg_beacon *reg_beacon)
1983{
1984 unsigned int i;
1985 struct ieee80211_supported_band *sband;
1986
e38f8a7a
LR		 1987 if (!wiphy->bands[reg_beacon->chan.band])
1988 return;
1989
1990 sband = wiphy->bands[reg_beacon->chan.band];
1991
1992 for (i = 0; i < sband->n_channels; i++)
1993 handle_reg_beacon(wiphy, i, reg_beacon);
1994}
1995
1996/*
1997 * Called upon reg changes or a new wiphy is added
1998 */
1999static void wiphy_update_beacon_reg(struct wiphy *wiphy)
2000{
2001 unsigned int i;
2002 struct ieee80211_supported_band *sband;
2003 struct reg_beacon *reg_beacon;
2004
e38f8a7a
LR		 2005 list_for_each_entry(reg_beacon, &reg_beacon_list, list) {
2006 if (!wiphy->bands[reg_beacon->chan.band])
2007 continue;
2008 sband = wiphy->bands[reg_beacon->chan.band];
2009 for (i = 0; i < sband->n_channels; i++)
2010 handle_reg_beacon(wiphy, i, reg_beacon);
2011 }
2012}
2013
e38f8a7a
LR		 2014/* Reap the advantages of previously found beacons */
2015static void reg_process_beacons(struct wiphy *wiphy)
2016{
b1ed8ddd
LR		 2017 /*
2018 * Means we are just firing up cfg80211, so no beacons would
2019 * have been processed yet.
2020 */
2021 if (!last_request)
2022 return;
e38f8a7a
LR		 2023 wiphy_update_beacon_reg(wiphy);
2024}
2025
1a919318 2026static bool is_ht40_allowed(struct ieee80211_channel *chan)
038659e7
LR		 2027{
2028 if (!chan)
1a919318 2029 return false;
038659e7 2030 if (chan->flags & IEEE80211_CHAN_DISABLED)
1a919318 2031 return false;
038659e7 2032 /* This would happen when regulatory rules disallow HT40 completely */
55b183ad
FF		 2033 if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40)
2034 return false;
2035 return true;
038659e7
LR		 2036}
2037
2038static void reg_process_ht_flags_channel(struct wiphy *wiphy,
fdc9d7b2 2039 struct ieee80211_channel *channel)
038659e7 2040{
fdc9d7b2 2041 struct ieee80211_supported_band *sband = wiphy->bands[channel->band];
038659e7 2042 struct ieee80211_channel *channel_before = NULL, *channel_after = NULL;
4e0854a7 2043 const struct ieee80211_regdomain *regd;
038659e7 2044 unsigned int i;
4e0854a7 2045 u32 flags;
038659e7 2046
1a919318 2047 if (!is_ht40_allowed(channel)) {
038659e7
LR		 2048 channel->flags |= IEEE80211_CHAN_NO_HT40;
2049 return;
2050 }
2051
2052 /*
2053 * We need to ensure the extension channels exist to
2054 * be able to use HT40- or HT40+, this finds them (or not)
2055 */
2056 for (i = 0; i < sband->n_channels; i++) {
2057 struct ieee80211_channel *c = &sband->channels[i];
1a919318 2058
038659e7
LR		 2059 if (c->center_freq == (channel->center_freq - 20))
2060 channel_before = c;
2061 if (c->center_freq == (channel->center_freq + 20))
2062 channel_after = c;
2063 }
2064
4e0854a7
EG		 2065 flags = 0;
2066 regd = get_wiphy_regdom(wiphy);
2067 if (regd) {
2068 const struct ieee80211_reg_rule *reg_rule =
2069 freq_reg_info_regd(MHZ_TO_KHZ(channel->center_freq),
2070 regd, MHZ_TO_KHZ(20));
2071
2072 if (!IS_ERR(reg_rule))
2073 flags = reg_rule->flags;
2074 }
2075
038659e7
LR		 2076 /*
2077 * Please note that this assumes target bandwidth is 20 MHz,
2078 * if that ever changes we also need to change the below logic
2079 * to include that as well.
2080 */
4e0854a7
EG		 2081 if (!is_ht40_allowed(channel_before) ||
2082 flags & NL80211_RRF_NO_HT40MINUS)
689da1b3 2083 channel->flags |= IEEE80211_CHAN_NO_HT40MINUS;
038659e7 2084 else
689da1b3 2085 channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
038659e7 2086
4e0854a7
EG		 2087 if (!is_ht40_allowed(channel_after) ||
2088 flags & NL80211_RRF_NO_HT40PLUS)
689da1b3 2089 channel->flags |= IEEE80211_CHAN_NO_HT40PLUS;
038659e7 2090 else
689da1b3 2091 channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
038659e7
LR		 2092}
2093
2094static void reg_process_ht_flags_band(struct wiphy *wiphy,
fdc9d7b2 2095 struct ieee80211_supported_band *sband)
038659e7
LR		 2096{
2097 unsigned int i;
038659e7 2098
fdc9d7b2
JB		 2099 if (!sband)
2100 return;
038659e7
LR		 2101
2102 for (i = 0; i < sband->n_channels; i++)
fdc9d7b2 2103 reg_process_ht_flags_channel(wiphy, &sband->channels[i]);
038659e7
LR		 2104}
2105
2106static void reg_process_ht_flags(struct wiphy *wiphy)
2107{
57fbcce3 2108 enum nl80211_band band;
038659e7
LR		 2109
2110 if (!wiphy)
2111 return;
2112
57fbcce3 2113 for (band = 0; band < NUM_NL80211_BANDS; band++)
fdc9d7b2 2114 reg_process_ht_flags_band(wiphy, wiphy->bands[band]);
038659e7
LR		 2115}
2116
0e3802db
LR		 2117static void reg_call_notifier(struct wiphy *wiphy,
2118 struct regulatory_request *request)
2119{
2120 if (wiphy->reg_notifier)
2121 wiphy->reg_notifier(wiphy, request);
2122}
2123
ad932f04
AN		 2124static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev)
2125{
f43e5210 2126 struct cfg80211_chan_def chandef = {};
ad932f04 2127 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
20658702 2128 enum nl80211_iftype iftype;
ad932f04
AN		 2129
2130 wdev_lock(wdev);
20658702 2131 iftype = wdev->iftype;
ad932f04 2132
20658702 2133 /* make sure the interface is active */
ad932f04 2134 if (!wdev->netdev || !netif_running(wdev->netdev))
20658702 2135 goto wdev_inactive_unlock;
ad932f04 2136
20658702 2137 switch (iftype) {
ad932f04
AN		 2138 case NL80211_IFTYPE_AP:
2139 case NL80211_IFTYPE_P2P_GO:
2140 if (!wdev->beacon_interval)
20658702
AN		 2141 goto wdev_inactive_unlock;
2142 chandef = wdev->chandef;
185076d6
AN		 2143 break;
2144 case NL80211_IFTYPE_ADHOC:
2145 if (!wdev->ssid_len)
20658702
AN		 2146 goto wdev_inactive_unlock;
2147 chandef = wdev->chandef;
ad932f04
AN		 2148 break;
2149 case NL80211_IFTYPE_STATION:
2150 case NL80211_IFTYPE_P2P_CLIENT:
ad932f04
AN		 2151 if (!wdev->current_bss ||
2152 !wdev->current_bss->pub.channel)
20658702 2153 goto wdev_inactive_unlock;
ad932f04 2154
20658702
AN		 2155 if (!rdev->ops->get_channel ||
2156 rdev_get_channel(rdev, wdev, &chandef))
2157 cfg80211_chandef_create(&chandef,
2158 wdev->current_bss->pub.channel,
2159 NL80211_CHAN_NO_HT);
ad932f04
AN		 2160 break;
2161 case NL80211_IFTYPE_MONITOR:
2162 case NL80211_IFTYPE_AP_VLAN:
2163 case NL80211_IFTYPE_P2P_DEVICE:
2164 /* no enforcement required */
2165 break;
2166 default:
2167 /* others not implemented for now */
2168 WARN_ON(1);
2169 break;
2170 }
2171
ad932f04 2172 wdev_unlock(wdev);
20658702
AN		 2173
2174 switch (iftype) {
2175 case NL80211_IFTYPE_AP:
2176 case NL80211_IFTYPE_P2P_GO:
2177 case NL80211_IFTYPE_ADHOC:
923b352f 2178 return cfg80211_reg_can_beacon_relax(wiphy, &chandef, iftype);
20658702
AN		 2179 case NL80211_IFTYPE_STATION:
2180 case NL80211_IFTYPE_P2P_CLIENT:
2181 return cfg80211_chandef_usable(wiphy, &chandef,
2182 IEEE80211_CHAN_DISABLED);
2183 default:
2184 break;
2185 }
2186
2187 return true;
2188
2189wdev_inactive_unlock:
2190 wdev_unlock(wdev);
2191 return true;
ad932f04
AN		 2192}
2193
2194static void reg_leave_invalid_chans(struct wiphy *wiphy)
2195{
2196 struct wireless_dev *wdev;
2197 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
2198
2199 ASSERT_RTNL();
2200
53873f13 2201 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
ad932f04
AN		 2202 if (!reg_wdev_chan_valid(wiphy, wdev))
2203 cfg80211_leave(rdev, wdev);
2204}
2205
2206static void reg_check_chans_work(struct work_struct *work)
2207{
2208 struct cfg80211_registered_device *rdev;
2209
c799ba6e 2210 pr_debug("Verifying active interfaces after reg change\n");
ad932f04
AN		 2211 rtnl_lock();
2212
2213 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
2214 if (!(rdev->wiphy.regulatory_flags &
2215 REGULATORY_IGNORE_STALE_KICKOFF))
2216 reg_leave_invalid_chans(&rdev->wiphy);
2217
2218 rtnl_unlock();
2219}
2220
2221static void reg_check_channels(void)
2222{
2223 /*
2224 * Give usermode a chance to do something nicer (move to another
2225 * channel, orderly disconnection), before forcing a disconnection.
2226 */
2227 mod_delayed_work(system_power_efficient_wq,
2228 &reg_check_chans,
2229 msecs_to_jiffies(REG_ENFORCE_GRACE_MS));
2230}
2231
eac03e38
SN		 2232static void wiphy_update_regulatory(struct wiphy *wiphy,
2233 enum nl80211_reg_initiator initiator)
b2e1b302 2234{
57fbcce3 2235 enum nl80211_band band;
c492db37 2236 struct regulatory_request *lr = get_last_request();
eac03e38 2237
0e3802db
LR		 2238 if (ignore_reg_update(wiphy, initiator)) {
2239 /*
2240 * Regulatory updates set by CORE are ignored for custom
2241 * regulatory cards. Let us notify the changes to the driver,
2242 * as some drivers used this to restore its orig_* reg domain.
2243 */
2244 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
e31f6456
AS		 2245 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG &&
2246 !(wiphy->regulatory_flags &
2247 REGULATORY_WIPHY_SELF_MANAGED))
0e3802db 2248 reg_call_notifier(wiphy, lr);
a203c2aa 2249 return;
0e3802db 2250 }
a203c2aa 2251
c492db37 2252 lr->dfs_region = get_cfg80211_regdom()->dfs_region;
b68e6b3b 2253
57fbcce3 2254 for (band = 0; band < NUM_NL80211_BANDS; band++)
fdc9d7b2 2255 handle_band(wiphy, initiator, wiphy->bands[band]);
a203c2aa 2256
e38f8a7a 2257 reg_process_beacons(wiphy);
038659e7 2258 reg_process_ht_flags(wiphy);
0e3802db 2259 reg_call_notifier(wiphy, lr);
b2e1b302
LR		 2260}
2261
d7549cbb
SN		 2262static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
2263{
2264 struct cfg80211_registered_device *rdev;
4a38994f 2265 struct wiphy *wiphy;
d7549cbb 2266
5fe231e8 2267 ASSERT_RTNL();
458f4f9e 2268
4a38994f
RM		 2269 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2270 wiphy = &rdev->wiphy;
2271 wiphy_update_regulatory(wiphy, initiator);
4a38994f 2272 }
ad932f04
AN		 2273
2274 reg_check_channels();
d7549cbb
SN		 2275}
2276
1fa25e41 2277static void handle_channel_custom(struct wiphy *wiphy,
fdc9d7b2 2278 struct ieee80211_channel *chan,
c4b9d655
GB		 2279 const struct ieee80211_regdomain *regd,
2280 u32 min_bw)
1fa25e41 2281{
038659e7 2282 u32 bw_flags = 0;
1fa25e41
LR		 2283 const struct ieee80211_reg_rule *reg_rule = NULL;
2284 const struct ieee80211_power_rule *power_rule = NULL;
934f4c7d 2285 u32 bw, center_freq_khz;
ac46d48e 2286
934f4c7d 2287 center_freq_khz = ieee80211_channel_to_khz(chan);
c4b9d655 2288 for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) {
934f4c7d 2289 reg_rule = freq_reg_info_regd(center_freq_khz, regd, bw);
4edd5698
MM		 2290 if (!IS_ERR(reg_rule))
2291 break;
2292 }
1fa25e41 2293
a7ee7d44 2294 if (IS_ERR_OR_NULL(reg_rule)) {
934f4c7d
TP		 2295 pr_debug("Disabling freq %d.%03d MHz as custom regd has no rule that fits it\n",
2296 chan->center_freq, chan->freq_offset);
db8dfee5
AN		 2297 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
2298 chan->flags |= IEEE80211_CHAN_DISABLED;
2299 } else {
2300 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
2301 chan->flags = chan->orig_flags;
2302 }
1fa25e41
LR		 2303 return;
2304 }
2305
2306 power_rule = &reg_rule->power_rule;
1aeb135f 2307 bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
1fa25e41 2308
2e18b38f 2309 chan->dfs_state_entered = jiffies;
c7ab5081
AN		 2310 chan->dfs_state = NL80211_DFS_USABLE;
2311
2312 chan->beacon_found = false;
db8dfee5
AN		 2313
2314 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2315 chan->flags = chan->orig_flags | bw_flags |
2316 map_regdom_flags(reg_rule->flags);
2317 else
2318 chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags;
2319
1fa25e41 2320 chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);
279f0f55
FF		 2321 chan->max_reg_power = chan->max_power =
2322 (int) MBM_TO_DBM(power_rule->max_eirp);
2e18b38f
AN		 2323
2324 if (chan->flags & IEEE80211_CHAN_RADAR) {
2325 if (reg_rule->dfs_cac_ms)
2326 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
2327 else
2328 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
2329 }
2330
2331 chan->max_power = chan->max_reg_power;
1fa25e41
LR		 2332}
2333
fdc9d7b2
JB		 2334static void handle_band_custom(struct wiphy *wiphy,
2335 struct ieee80211_supported_band *sband,
1fa25e41
LR		 2336 const struct ieee80211_regdomain *regd)
2337{
2338 unsigned int i;
1fa25e41 2339
fdc9d7b2
JB		 2340 if (!sband)
2341 return;
1fa25e41 2342
c4b9d655
GB		 2343 /*
2344 * We currently assume that you always want at least 20 MHz,
2345 * otherwise channel 12 might get enabled if this rule is
2346 * compatible to US, which permits 2402 - 2472 MHz.
2347 */
1fa25e41 2348 for (i = 0; i < sband->n_channels; i++)
c4b9d655
GB		 2349 handle_channel_custom(wiphy, &sband->channels[i], regd,
2350 MHZ_TO_KHZ(20));
1fa25e41
LR		 2351}
2352
2353/* Used by drivers prior to wiphy registration */
2354void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
2355 const struct ieee80211_regdomain *regd)
2356{
57fbcce3 2357 enum nl80211_band band;
bbcf3f02 2358 unsigned int bands_set = 0;
ac46d48e 2359
a2f73b6c
LR		 2360 WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG),
2361 "wiphy should have REGULATORY_CUSTOM_REG\n");
2362 wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
222ea581 2363
57fbcce3 2364 for (band = 0; band < NUM_NL80211_BANDS; band++) {
bbcf3f02
LR		 2365 if (!wiphy->bands[band])
2366 continue;
fdc9d7b2 2367 handle_band_custom(wiphy, wiphy->bands[band], regd);
bbcf3f02 2368 bands_set++;
b2e1b302 2369 }
bbcf3f02
LR		 2370
2371 /*
2372 * no point in calling this if it won't have any effect
1a919318 2373 * on your device's supported bands.
bbcf3f02
LR		 2374 */
2375 WARN_ON(!bands_set);
b2e1b302 2376}
1fa25e41
LR		 2377EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
2378
b2e253cf
LR		 2379static void reg_set_request_processed(void)
2380{
2381 bool need_more_processing = false;
c492db37 2382 struct regulatory_request *lr = get_last_request();
b2e253cf 2383
c492db37 2384 lr->processed = true;
b2e253cf
LR		 2385
2386 spin_lock(&reg_requests_lock);
2387 if (!list_empty(&reg_requests_list))
2388 need_more_processing = true;
2389 spin_unlock(&reg_requests_lock);
2390
b6863036 2391 cancel_crda_timeout();
a90c7a31 2392
b2e253cf
LR		 2393 if (need_more_processing)
2394 schedule_work(&reg_work);
2395}
2396
b3eb7f3f
LR		 2397/**
2398 * reg_process_hint_core - process core regulatory requests
726e6af9 2399 * @core_request: a pending core regulatory request
b3eb7f3f
LR		 2400 *
2401 * The wireless subsystem can use this function to process
2402 * a regulatory request issued by the regulatory core.
b3eb7f3f 2403 */
d34265a3
JB		 2404static enum reg_request_treatment
2405reg_process_hint_core(struct regulatory_request *core_request)
b3eb7f3f 2406{
cecbb069 2407 if (reg_query_database(core_request)) {
25b20dbd
JB		 2408 core_request->intersect = false;
2409 core_request->processed = false;
2410 reg_update_last_request(core_request);
d34265a3 2411 return REG_REQ_OK;
25b20dbd 2412 }
d34265a3
JB		 2413
2414 return REG_REQ_IGNORE;
b3eb7f3f
LR		 2415}
2416
0d97a619
LR		 2417static enum reg_request_treatment
2418__reg_process_hint_user(struct regulatory_request *user_request)
2419{
2420 struct regulatory_request *lr = get_last_request();
2421
2422 if (reg_request_cell_base(user_request))
2423 return reg_ignore_cell_hint(user_request);
2424
2425 if (reg_request_cell_base(lr))
2426 return REG_REQ_IGNORE;
2427
2428 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
2429 return REG_REQ_INTERSECT;
2430 /*
2431 * If the user knows better the user should set the regdom
2432 * to their country before the IE is picked up
2433 */
2434 if (lr->initiator == NL80211_REGDOM_SET_BY_USER &&
2435 lr->intersect)
2436 return REG_REQ_IGNORE;
2437 /*
2438 * Process user requests only after previous user/driver/core
2439 * requests have been processed
2440 */
2441 if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE ||
2442 lr->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
2443 lr->initiator == NL80211_REGDOM_SET_BY_USER) &&
2444 regdom_changes(lr->alpha2))
2445 return REG_REQ_IGNORE;
2446
2447 if (!regdom_changes(user_request->alpha2))
2448 return REG_REQ_ALREADY_SET;
2449
2450 return REG_REQ_OK;
2451}
2452
2453/**
2454 * reg_process_hint_user - process user regulatory requests
2455 * @user_request: a pending user regulatory request
2456 *
2457 * The wireless subsystem can use this function to process
2458 * a regulatory request initiated by userspace.
0d97a619 2459 */
d34265a3
JB		 2460static enum reg_request_treatment
2461reg_process_hint_user(struct regulatory_request *user_request)
0d97a619
LR		 2462{
2463 enum reg_request_treatment treatment;
0d97a619
LR		 2464
2465 treatment = __reg_process_hint_user(user_request);
2466 if (treatment == REG_REQ_IGNORE ||
d34265a3
JB		 2467 treatment == REG_REQ_ALREADY_SET)
2468 return REG_REQ_IGNORE;
0d97a619 2469
0d97a619
LR		 2470 user_request->intersect = treatment == REG_REQ_INTERSECT;
2471 user_request->processed = false;
5ad6ef5e 2472
cecbb069 2473 if (reg_query_database(user_request)) {
25b20dbd
JB		 2474 reg_update_last_request(user_request);
2475 user_alpha2[0] = user_request->alpha2[0];
2476 user_alpha2[1] = user_request->alpha2[1];
d34265a3 2477 return REG_REQ_OK;
25b20dbd 2478 }
d34265a3
JB		 2479
2480 return REG_REQ_IGNORE;
0d97a619
LR		 2481}
2482
21636c7f
LR		 2483static enum reg_request_treatment
2484__reg_process_hint_driver(struct regulatory_request *driver_request)
2485{
2486 struct regulatory_request *lr = get_last_request();
2487
2488 if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) {
2489 if (regdom_changes(driver_request->alpha2))
2490 return REG_REQ_OK;
2491 return REG_REQ_ALREADY_SET;
2492 }
2493
2494 /*
2495 * This would happen if you unplug and plug your card
2496 * back in or if you add a new device for which the previously
2497 * loaded card also agrees on the regulatory domain.
2498 */
2499 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
2500 !regdom_changes(driver_request->alpha2))
2501 return REG_REQ_ALREADY_SET;
2502
2503 return REG_REQ_INTERSECT;
2504}
2505
2506/**
2507 * reg_process_hint_driver - process driver regulatory requests
726e6af9 2508 * @wiphy: the wireless device for the regulatory request
21636c7f
LR		 2509 * @driver_request: a pending driver regulatory request
2510 *
2511 * The wireless subsystem can use this function to process
2512 * a regulatory request issued by an 802.11 driver.
2513 *
2514 * Returns one of the different reg request treatment values.
2515 */
2516static enum reg_request_treatment
2517reg_process_hint_driver(struct wiphy *wiphy,
2518 struct regulatory_request *driver_request)
2519{
34f05f54 2520 const struct ieee80211_regdomain *regd, *tmp;
21636c7f 2521 enum reg_request_treatment treatment;
21636c7f
LR		 2522
2523 treatment = __reg_process_hint_driver(driver_request);
2524
2525 switch (treatment) {
2526 case REG_REQ_OK:
2527 break;
2528 case REG_REQ_IGNORE:
d34265a3 2529 return REG_REQ_IGNORE;
21636c7f 2530 case REG_REQ_INTERSECT:
21636c7f
LR		 2531 case REG_REQ_ALREADY_SET:
2532 regd = reg_copy_regd(get_cfg80211_regdom());
d34265a3
JB		 2533 if (IS_ERR(regd))
2534 return REG_REQ_IGNORE;
34f05f54
AN		 2535
2536 tmp = get_wiphy_regdom(wiphy);
21636c7f 2537 rcu_assign_pointer(wiphy->regd, regd);
34f05f54 2538 rcu_free_regdom(tmp);
21636c7f
LR		 2539 }
2540
21636c7f
LR		 2541
2542 driver_request->intersect = treatment == REG_REQ_INTERSECT;
2543 driver_request->processed = false;
5ad6ef5e 2544
21636c7f
LR		 2545 /*
2546 * Since CRDA will not be called in this case as we already
2547 * have applied the requested regulatory domain before we just
2548 * inform userspace we have processed the request
2549 */
2550 if (treatment == REG_REQ_ALREADY_SET) {
2551 nl80211_send_reg_change_event(driver_request);
25b20dbd 2552 reg_update_last_request(driver_request);
21636c7f 2553 reg_set_request_processed();
480908a7 2554 return REG_REQ_ALREADY_SET;
21636c7f
LR		 2555 }
2556
d34265a3 2557 if (reg_query_database(driver_request)) {
25b20dbd 2558 reg_update_last_request(driver_request);
d34265a3
JB		 2559 return REG_REQ_OK;
2560 }
25b20dbd 2561
d34265a3 2562 return REG_REQ_IGNORE;
21636c7f
LR		 2563}
2564
b23e7a9e
LR		 2565static enum reg_request_treatment
2566__reg_process_hint_country_ie(struct wiphy *wiphy,
2567 struct regulatory_request *country_ie_request)
2568{
2569 struct wiphy *last_wiphy = NULL;
2570 struct regulatory_request *lr = get_last_request();
2571
2572 if (reg_request_cell_base(lr)) {
2573 /* Trust a Cell base station over the AP's country IE */
2574 if (regdom_changes(country_ie_request->alpha2))
2575 return REG_REQ_IGNORE;
2576 return REG_REQ_ALREADY_SET;
2a901468
LR		 2577 } else {
2578 if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE)
2579 return REG_REQ_IGNORE;
b23e7a9e
LR		 2580 }
2581
b23e7a9e
LR		 2582 if (unlikely(!is_an_alpha2(country_ie_request->alpha2)))
2583 return -EINVAL;
2f1c6c57
LR		 2584
2585 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE)
2586 return REG_REQ_OK;
2587
2588 last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
2589
2590 if (last_wiphy != wiphy) {
b23e7a9e 2591 /*
2f1c6c57
LR		 2592 * Two cards with two APs claiming different
2593 * Country IE alpha2s. We could
2594 * intersect them, but that seems unlikely
2595 * to be correct. Reject second one for now.
b23e7a9e 2596 */
2f1c6c57
LR		 2597 if (regdom_changes(country_ie_request->alpha2))
2598 return REG_REQ_IGNORE;
b23e7a9e
LR		 2599 return REG_REQ_ALREADY_SET;
2600 }
70dcec5a
EG		 2601
2602 if (regdom_changes(country_ie_request->alpha2))
2f1c6c57
LR		 2603 return REG_REQ_OK;
2604 return REG_REQ_ALREADY_SET;
b23e7a9e
LR		 2605}
2606
d1c96a9a 2607/**
b23e7a9e 2608 * reg_process_hint_country_ie - process regulatory requests from country IEs
726e6af9 2609 * @wiphy: the wireless device for the regulatory request
b23e7a9e 2610 * @country_ie_request: a regulatory request from a country IE
d1c96a9a 2611 *
b23e7a9e
LR		 2612 * The wireless subsystem can use this function to process
2613 * a regulatory request issued by a country Information Element.
d1c96a9a 2614 *
2f92212b 2615 * Returns one of the different reg request treatment values.
d1c96a9a 2616 */
2f92212b 2617static enum reg_request_treatment
b23e7a9e
LR		 2618reg_process_hint_country_ie(struct wiphy *wiphy,
2619 struct regulatory_request *country_ie_request)
b2e1b302 2620{
2f92212b 2621 enum reg_request_treatment treatment;
761cf7ec 2622
b23e7a9e 2623 treatment = __reg_process_hint_country_ie(wiphy, country_ie_request);
9c96477d 2624
2f92212b 2625 switch (treatment) {
2f92212b
JB		 2626 case REG_REQ_OK:
2627 break;
b23e7a9e 2628 case REG_REQ_IGNORE:
d34265a3 2629 return REG_REQ_IGNORE;
b23e7a9e 2630 case REG_REQ_ALREADY_SET:
c888393b 2631 reg_free_request(country_ie_request);
480908a7 2632 return REG_REQ_ALREADY_SET;
b23e7a9e 2633 case REG_REQ_INTERSECT:
fb1fc7ad 2634 /*
b23e7a9e
LR		 2635 * This doesn't happen yet, not sure we
2636 * ever want to support it for this case.
fb1fc7ad 2637 */
8db0c433 2638 WARN_ONCE(1, "Unexpected intersection for country elements");
d34265a3 2639 return REG_REQ_IGNORE;
3e0c3ff3 2640 }
b2e1b302 2641
b23e7a9e
LR		 2642 country_ie_request->intersect = false;
2643 country_ie_request->processed = false;
5ad6ef5e 2644
d34265a3 2645 if (reg_query_database(country_ie_request)) {
25b20dbd 2646 reg_update_last_request(country_ie_request);
d34265a3
JB		 2647 return REG_REQ_OK;
2648 }
3e0c3ff3 2649
d34265a3 2650 return REG_REQ_IGNORE;
b2e1b302
LR		 2651}
2652
89766727
VT		 2653bool reg_dfs_domain_same(struct wiphy *wiphy1, struct wiphy *wiphy2)
2654{
2655 const struct ieee80211_regdomain *wiphy1_regd = NULL;
2656 const struct ieee80211_regdomain *wiphy2_regd = NULL;
2657 const struct ieee80211_regdomain *cfg80211_regd = NULL;
2658 bool dfs_domain_same;
2659
2660 rcu_read_lock();
2661
2662 cfg80211_regd = rcu_dereference(cfg80211_regdomain);
2663 wiphy1_regd = rcu_dereference(wiphy1->regd);
2664 if (!wiphy1_regd)
2665 wiphy1_regd = cfg80211_regd;
2666
2667 wiphy2_regd = rcu_dereference(wiphy2->regd);
2668 if (!wiphy2_regd)
2669 wiphy2_regd = cfg80211_regd;
2670
2671 dfs_domain_same = wiphy1_regd->dfs_region == wiphy2_regd->dfs_region;
2672
2673 rcu_read_unlock();
2674
2675 return dfs_domain_same;
2676}
2677
2678static void reg_copy_dfs_chan_state(struct ieee80211_channel *dst_chan,
2679 struct ieee80211_channel *src_chan)
2680{
2681 if (!(dst_chan->flags & IEEE80211_CHAN_RADAR) ||
2682 !(src_chan->flags & IEEE80211_CHAN_RADAR))
2683 return;
2684
2685 if (dst_chan->flags & IEEE80211_CHAN_DISABLED ||
2686 src_chan->flags & IEEE80211_CHAN_DISABLED)
2687 return;
2688
2689 if (src_chan->center_freq == dst_chan->center_freq &&
2690 dst_chan->dfs_state == NL80211_DFS_USABLE) {
2691 dst_chan->dfs_state = src_chan->dfs_state;
2692 dst_chan->dfs_state_entered = src_chan->dfs_state_entered;
2693 }
2694}
2695
2696static void wiphy_share_dfs_chan_state(struct wiphy *dst_wiphy,
2697 struct wiphy *src_wiphy)
2698{
2699 struct ieee80211_supported_band *src_sband, *dst_sband;
2700 struct ieee80211_channel *src_chan, *dst_chan;
2701 int i, j, band;
2702
2703 if (!reg_dfs_domain_same(dst_wiphy, src_wiphy))
2704 return;
2705
2706 for (band = 0; band < NUM_NL80211_BANDS; band++) {
2707 dst_sband = dst_wiphy->bands[band];
2708 src_sband = src_wiphy->bands[band];
2709 if (!dst_sband || !src_sband)
2710 continue;
2711
2712 for (i = 0; i < dst_sband->n_channels; i++) {
2713 dst_chan = &dst_sband->channels[i];
2714 for (j = 0; j < src_sband->n_channels; j++) {
2715 src_chan = &src_sband->channels[j];
2716 reg_copy_dfs_chan_state(dst_chan, src_chan);
2717 }
2718 }
2719 }
2720}
2721
2722static void wiphy_all_share_dfs_chan_state(struct wiphy *wiphy)
2723{
2724 struct cfg80211_registered_device *rdev;
2725
2726 ASSERT_RTNL();
2727
2728 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2729 if (wiphy == &rdev->wiphy)
2730 continue;
2731 wiphy_share_dfs_chan_state(wiphy, &rdev->wiphy);
2732 }
2733}
2734
30a548c7 2735/* This processes *all* regulatory hints */
1daa37c7 2736static void reg_process_hint(struct regulatory_request *reg_request)
fe33eb39 2737{
fe33eb39 2738 struct wiphy *wiphy = NULL;
b3eb7f3f 2739 enum reg_request_treatment treatment;
1db58529 2740 enum nl80211_reg_initiator initiator = reg_request->initiator;
fe33eb39 2741
f4173766 2742 if (reg_request->wiphy_idx != WIPHY_IDX_INVALID)
fe33eb39
LR		 2743 wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
2744
1db58529 2745 switch (initiator) {
b3eb7f3f 2746 case NL80211_REGDOM_SET_BY_CORE:
d34265a3
JB		 2747 treatment = reg_process_hint_core(reg_request);
2748 break;
b3eb7f3f 2749 case NL80211_REGDOM_SET_BY_USER:
d34265a3
JB		 2750 treatment = reg_process_hint_user(reg_request);
2751 break;
b3eb7f3f 2752 case NL80211_REGDOM_SET_BY_DRIVER:
772f0389
IP		 2753 if (!wiphy)
2754 goto out_free;
21636c7f
LR		 2755 treatment = reg_process_hint_driver(wiphy, reg_request);
2756 break;
b3eb7f3f 2757 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
772f0389
IP		 2758 if (!wiphy)
2759 goto out_free;
b23e7a9e 2760 treatment = reg_process_hint_country_ie(wiphy, reg_request);
b3eb7f3f
LR		 2761 break;
2762 default:
1db58529 2763 WARN(1, "invalid initiator %d\n", initiator);
772f0389 2764 goto out_free;
b3eb7f3f
LR		 2765 }
2766
d34265a3
JB		 2767 if (treatment == REG_REQ_IGNORE)
2768 goto out_free;
2769
480908a7
JB		 2770 WARN(treatment != REG_REQ_OK && treatment != REG_REQ_ALREADY_SET,
2771 "unexpected treatment value %d\n", treatment);
2772
841b351c
JL		 2773 /* This is required so that the orig_* parameters are saved.
2774 * NOTE: treatment must be set for any case that reaches here!
2775 */
b23e7a9e 2776 if (treatment == REG_REQ_ALREADY_SET && wiphy &&
ad932f04 2777 wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1db58529 2778 wiphy_update_regulatory(wiphy, initiator);
89766727 2779 wiphy_all_share_dfs_chan_state(wiphy);
ad932f04
AN		 2780 reg_check_channels();
2781 }
772f0389
IP		 2782
2783 return;
2784
2785out_free:
c888393b 2786 reg_free_request(reg_request);
fe33eb39
LR		 2787}
2788
aced43ce
AS		 2789static void notify_self_managed_wiphys(struct regulatory_request *request)
2790{
2791 struct cfg80211_registered_device *rdev;
2792 struct wiphy *wiphy;
2793
2794 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2795 wiphy = &rdev->wiphy;
2796 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
c82c06ce 2797 request->initiator == NL80211_REGDOM_SET_BY_USER)
aced43ce
AS		 2798 reg_call_notifier(wiphy, request);
2799 }
2800}
2801
b2e253cf
LR		 2802/*
2803 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
2804 * Regulatory hints come on a first come first serve basis and we
2805 * must process each one atomically.
2806 */
fe33eb39 2807static void reg_process_pending_hints(void)
b0e2880b 2808{
c492db37 2809 struct regulatory_request *reg_request, *lr;
fe33eb39 2810
c492db37 2811 lr = get_last_request();
b0e2880b 2812
b2e253cf 2813 /* When last_request->processed becomes true this will be rescheduled */
c492db37 2814 if (lr && !lr->processed) {
0d31d4db 2815 pr_debug("Pending regulatory request, waiting for it to be processed...\n");
5fe231e8 2816 return;
b2e253cf
LR		 2817 }
2818
fe33eb39 2819 spin_lock(&reg_requests_lock);
fe33eb39 2820
b2e253cf 2821 if (list_empty(&reg_requests_list)) {
d951c1dd 2822 spin_unlock(&reg_requests_lock);
5fe231e8 2823 return;
fe33eb39 2824 }
b2e253cf
LR		 2825
2826 reg_request = list_first_entry(&reg_requests_list,
2827 struct regulatory_request,
2828 list);
2829 list_del_init(&reg_request->list);
2830
fe33eb39 2831 spin_unlock(&reg_requests_lock);
b0e2880b 2832
aced43ce 2833 notify_self_managed_wiphys(reg_request);
ef51fb1d 2834
1daa37c7 2835 reg_process_hint(reg_request);
2e54a689
B		 2836
2837 lr = get_last_request();
2838
2839 spin_lock(&reg_requests_lock);
2840 if (!list_empty(&reg_requests_list) && lr && lr->processed)
2841 schedule_work(&reg_work);
2842 spin_unlock(&reg_requests_lock);
fe33eb39
LR		 2843}
2844
e38f8a7a
LR		 2845/* Processes beacon hints -- this has nothing to do with country IEs */
2846static void reg_process_pending_beacon_hints(void)
2847{
79c97e97 2848 struct cfg80211_registered_device *rdev;
e38f8a7a
LR		 2849 struct reg_beacon *pending_beacon, *tmp;
2850
e38f8a7a
LR		 2851 /* This goes through the _pending_ beacon list */
2852 spin_lock_bh(&reg_pending_beacons_lock);
2853
e38f8a7a
LR		 2854 list_for_each_entry_safe(pending_beacon, tmp,
2855 &reg_pending_beacons, list) {
e38f8a7a
LR		 2856 list_del_init(&pending_beacon->list);
2857
2858 /* Applies the beacon hint to current wiphys */
79c97e97
JB		 2859 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
2860 wiphy_update_new_beacon(&rdev->wiphy, pending_beacon);
e38f8a7a
LR		 2861
2862 /* Remembers the beacon hint for new wiphys or reg changes */
2863 list_add_tail(&pending_beacon->list, &reg_beacon_list);
2864 }
2865
2866 spin_unlock_bh(&reg_pending_beacons_lock);
e38f8a7a
LR		 2867}
2868
b0d7aa59
JD		 2869static void reg_process_self_managed_hints(void)
2870{
2871 struct cfg80211_registered_device *rdev;
2872 struct wiphy *wiphy;
2873 const struct ieee80211_regdomain *tmp;
2874 const struct ieee80211_regdomain *regd;
57fbcce3 2875 enum nl80211_band band;
b0d7aa59
JD		 2876 struct regulatory_request request = {};
2877
2878 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2879 wiphy = &rdev->wiphy;
2880
2881 spin_lock(&reg_requests_lock);
2882 regd = rdev->requested_regd;
2883 rdev->requested_regd = NULL;
2884 spin_unlock(&reg_requests_lock);
2885
2886 if (regd == NULL)
2887 continue;
2888
2889 tmp = get_wiphy_regdom(wiphy);
2890 rcu_assign_pointer(wiphy->regd, regd);
2891 rcu_free_regdom(tmp);
2892
57fbcce3 2893 for (band = 0; band < NUM_NL80211_BANDS; band++)
b0d7aa59
JD		 2894 handle_band_custom(wiphy, wiphy->bands[band], regd);
2895
2896 reg_process_ht_flags(wiphy);
2897
2898 request.wiphy_idx = get_wiphy_idx(wiphy);
2899 request.alpha2[0] = regd->alpha2[0];
2900 request.alpha2[1] = regd->alpha2[1];
2901 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
2902
2903 nl80211_send_wiphy_reg_change_event(&request);
2904 }
2905
2906 reg_check_channels();
2907}
2908
fe33eb39
LR		 2909static void reg_todo(struct work_struct *work)
2910{
5fe231e8 2911 rtnl_lock();
fe33eb39 2912 reg_process_pending_hints();
e38f8a7a 2913 reg_process_pending_beacon_hints();
b0d7aa59 2914 reg_process_self_managed_hints();
5fe231e8 2915 rtnl_unlock();
fe33eb39
LR		 2916}
2917
fe33eb39
LR		 2918static void queue_regulatory_request(struct regulatory_request *request)
2919{
d4f2c881
JB		 2920 request->alpha2[0] = toupper(request->alpha2[0]);
2921 request->alpha2[1] = toupper(request->alpha2[1]);
c61029c7 2922
fe33eb39
LR		 2923 spin_lock(&reg_requests_lock);
2924 list_add_tail(&request->list, &reg_requests_list);
2925 spin_unlock(&reg_requests_lock);
2926
2927 schedule_work(&reg_work);
2928}
2929
09d989d1
LR		 2930/*
2931 * Core regulatory hint -- happens during cfg80211_init()
2932 * and when we restore regulatory settings.
2933 */
ba25c141
LR		 2934static int regulatory_hint_core(const char *alpha2)
2935{
2936 struct regulatory_request *request;
2937
1a919318 2938 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
ba25c141
LR		 2939 if (!request)
2940 return -ENOMEM;
2941
2942 request->alpha2[0] = alpha2[0];
2943 request->alpha2[1] = alpha2[1];
7db90f4a 2944 request->initiator = NL80211_REGDOM_SET_BY_CORE;
24f33e64 2945 request->wiphy_idx = WIPHY_IDX_INVALID;
ba25c141 2946
31e99729 2947 queue_regulatory_request(request);
5078b2e3 2948
fe33eb39 2949 return 0;
ba25c141
LR		 2950}
2951
fe33eb39 2952/* User hints */
57b5ce07
LR		 2953int regulatory_hint_user(const char *alpha2,
2954 enum nl80211_user_reg_hint_type user_reg_hint_type)
b2e1b302 2955{
fe33eb39
LR		 2956 struct regulatory_request *request;
2957
fdc9d7b2
JB		 2958 if (WARN_ON(!alpha2))
2959 return -EINVAL;
b2e1b302 2960
fe33eb39
LR		 2961 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2962 if (!request)
2963 return -ENOMEM;
2964
f4173766 2965 request->wiphy_idx = WIPHY_IDX_INVALID;
fe33eb39
LR		 2966 request->alpha2[0] = alpha2[0];
2967 request->alpha2[1] = alpha2[1];
e12822e1 2968 request->initiator = NL80211_REGDOM_SET_BY_USER;
57b5ce07 2969 request->user_reg_hint_type = user_reg_hint_type;
fe33eb39 2970
c37722bd 2971 /* Allow calling CRDA again */
b6863036 2972 reset_crda_timeouts();
c37722bd 2973
fe33eb39
LR		 2974 queue_regulatory_request(request);
2975
2976 return 0;
2977}
2978
05050753 2979int regulatory_hint_indoor(bool is_indoor, u32 portid)
52616f2b 2980{
05050753 2981 spin_lock(&reg_indoor_lock);
52616f2b 2982
05050753
I		 2983 /* It is possible that more than one user space process is trying to
2984 * configure the indoor setting. To handle such cases, clear the indoor
2985 * setting in case that some process does not think that the device
2986 * is operating in an indoor environment. In addition, if a user space
2987 * process indicates that it is controlling the indoor setting, save its
2988 * portid, i.e., make it the owner.
2989 */
2990 reg_is_indoor = is_indoor;
2991 if (reg_is_indoor) {
2992 if (!reg_is_indoor_portid)
2993 reg_is_indoor_portid = portid;
2994 } else {
2995 reg_is_indoor_portid = 0;
2996 }
52616f2b 2997
05050753 2998 spin_unlock(&reg_indoor_lock);
52616f2b 2999
05050753
I		 3000 if (!is_indoor)
3001 reg_check_channels();
52616f2b
IP		 3002
3003 return 0;
3004}
3005
05050753
I		 3006void regulatory_netlink_notify(u32 portid)
3007{
3008 spin_lock(&reg_indoor_lock);
3009
3010 if (reg_is_indoor_portid != portid) {
3011 spin_unlock(&reg_indoor_lock);
3012 return;
3013 }
3014
3015 reg_is_indoor = false;
3016 reg_is_indoor_portid = 0;
3017
3018 spin_unlock(&reg_indoor_lock);
3019
3020 reg_check_channels();
3021}
3022
fe33eb39
LR		 3023/* Driver hints */
3024int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
3025{
3026 struct regulatory_request *request;
3027
fdc9d7b2
JB		 3028 if (WARN_ON(!alpha2 || !wiphy))
3029 return -EINVAL;
fe33eb39 3030
4f7b9140
LR		 3031 wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG;
3032
fe33eb39
LR		 3033 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
3034 if (!request)
3035 return -ENOMEM;
3036
3037 request->wiphy_idx = get_wiphy_idx(wiphy);
3038
fe33eb39
LR		 3039 request->alpha2[0] = alpha2[0];
3040 request->alpha2[1] = alpha2[1];
7db90f4a 3041 request->initiator = NL80211_REGDOM_SET_BY_DRIVER;
fe33eb39 3042
c37722bd 3043 /* Allow calling CRDA again */
b6863036 3044 reset_crda_timeouts();
c37722bd 3045
fe33eb39
LR		 3046 queue_regulatory_request(request);
3047
3048 return 0;
b2e1b302
LR		 3049}
3050EXPORT_SYMBOL(regulatory_hint);
3051
57fbcce3 3052void regulatory_hint_country_ie(struct wiphy *wiphy, enum nl80211_band band,
789fd033 3053 const u8 *country_ie, u8 country_ie_len)
3f2355cb 3054{
3f2355cb 3055 char alpha2[2];
3f2355cb 3056 enum environment_cap env = ENVIRON_ANY;
db2424c5 3057 struct regulatory_request *request = NULL, *lr;
d335fe63 3058
3f2355cb
LR		 3059 /* IE len must be evenly divisible by 2 */
3060 if (country_ie_len & 0x01)
db2424c5 3061 return;
3f2355cb
LR		 3062
3063 if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
db2424c5
JB		 3064 return;
3065
3066 request = kzalloc(sizeof(*request), GFP_KERNEL);
3067 if (!request)
3068 return;
3f2355cb 3069
3f2355cb
LR		 3070 alpha2[0] = country_ie[0];
3071 alpha2[1] = country_ie[1];
3072
3073 if (country_ie[2] == 'I')
3074 env = ENVIRON_INDOOR;
3075 else if (country_ie[2] == 'O')
3076 env = ENVIRON_OUTDOOR;
3077
db2424c5
JB		 3078 rcu_read_lock();
3079 lr = get_last_request();
3080
3081 if (unlikely(!lr))
3082 goto out;
3083
fb1fc7ad 3084 /*
8b19e6ca 3085 * We will run this only upon a successful connection on cfg80211.
4b44c8bc 3086 * We leave conflict resolution to the workqueue, where can hold
5fe231e8 3087 * the RTNL.
fb1fc7ad 3088 */
c492db37
JB		 3089 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
3090 lr->wiphy_idx != WIPHY_IDX_INVALID)
4b44c8bc 3091 goto out;
3f2355cb 3092
fe33eb39 3093 request->wiphy_idx = get_wiphy_idx(wiphy);
4f366c5d
JL		 3094 request->alpha2[0] = alpha2[0];
3095 request->alpha2[1] = alpha2[1];
7db90f4a 3096 request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE;
fe33eb39
LR		 3097 request->country_ie_env = env;
3098
c37722bd 3099 /* Allow calling CRDA again */
b6863036 3100 reset_crda_timeouts();
c37722bd 3101
fe33eb39 3102 queue_regulatory_request(request);
db2424c5 3103 request = NULL;
3f2355cb 3104out:
db2424c5
JB		 3105 kfree(request);
3106 rcu_read_unlock();
3f2355cb 3107}
b2e1b302 3108
09d989d1
LR		 3109static void restore_alpha2(char *alpha2, bool reset_user)
3110{
3111 /* indicates there is no alpha2 to consider for restoration */
3112 alpha2[0] = '9';
3113 alpha2[1] = '7';
3114
3115 /* The user setting has precedence over the module parameter */
3116 if (is_user_regdom_saved()) {
3117 /* Unless we're asked to ignore it and reset it */
3118 if (reset_user) {
c799ba6e 3119 pr_debug("Restoring regulatory settings including user preference\n");
09d989d1
LR		 3120 user_alpha2[0] = '9';
3121 user_alpha2[1] = '7';
3122
3123 /*
3124 * If we're ignoring user settings, we still need to
3125 * check the module parameter to ensure we put things
3126 * back as they were for a full restore.
3127 */
3128 if (!is_world_regdom(ieee80211_regdom)) {
c799ba6e
JB		 3129 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
3130 ieee80211_regdom[0], ieee80211_regdom[1]);
09d989d1
LR		 3131 alpha2[0] = ieee80211_regdom[0];
3132 alpha2[1] = ieee80211_regdom[1];
3133 }
3134 } else {
c799ba6e
JB		 3135 pr_debug("Restoring regulatory settings while preserving user preference for: %c%c\n",
3136 user_alpha2[0], user_alpha2[1]);
09d989d1
LR		 3137 alpha2[0] = user_alpha2[0];
3138 alpha2[1] = user_alpha2[1];
3139 }
3140 } else if (!is_world_regdom(ieee80211_regdom)) {
c799ba6e
JB		 3141 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
3142 ieee80211_regdom[0], ieee80211_regdom[1]);
09d989d1
LR		 3143 alpha2[0] = ieee80211_regdom[0];
3144 alpha2[1] = ieee80211_regdom[1];
3145 } else
c799ba6e 3146 pr_debug("Restoring regulatory settings\n");
09d989d1
LR		 3147}
3148
5ce543d1
RM		 3149static void restore_custom_reg_settings(struct wiphy *wiphy)
3150{
3151 struct ieee80211_supported_band *sband;
57fbcce3 3152 enum nl80211_band band;
5ce543d1
RM		 3153 struct ieee80211_channel *chan;
3154 int i;
3155
57fbcce3 3156 for (band = 0; band < NUM_NL80211_BANDS; band++) {
5ce543d1
RM		 3157 sband = wiphy->bands[band];
3158 if (!sband)
3159 continue;
3160 for (i = 0; i < sband->n_channels; i++) {
3161 chan = &sband->channels[i];
3162 chan->flags = chan->orig_flags;
3163 chan->max_antenna_gain = chan->orig_mag;
3164 chan->max_power = chan->orig_mpwr;
899852af 3165 chan->beacon_found = false;
5ce543d1
RM		 3166 }
3167 }
3168}
3169
09d989d1
LR		 3170/*
3171 * Restoring regulatory settings involves ingoring any
3172 * possibly stale country IE information and user regulatory
3173 * settings if so desired, this includes any beacon hints
3174 * learned as we could have traveled outside to another country
3175 * after disconnection. To restore regulatory settings we do
3176 * exactly what we did at bootup:
3177 *
3178 * - send a core regulatory hint
3179 * - send a user regulatory hint if applicable
3180 *
3181 * Device drivers that send a regulatory hint for a specific country
cc5a639b 3182 * keep their own regulatory domain on wiphy->regd so that does
09d989d1
LR		 3183 * not need to be remembered.
3184 */
e646a025 3185static void restore_regulatory_settings(bool reset_user, bool cached)
09d989d1
LR		 3186{
3187 char alpha2[2];
cee0bec5 3188 char world_alpha2[2];
09d989d1 3189 struct reg_beacon *reg_beacon, *btmp;
14609555 3190 LIST_HEAD(tmp_reg_req_list);
5ce543d1 3191 struct cfg80211_registered_device *rdev;
09d989d1 3192
5fe231e8
JB		 3193 ASSERT_RTNL();
3194
05050753
I		 3195 /*
3196 * Clear the indoor setting in case that it is not controlled by user
3197 * space, as otherwise there is no guarantee that the device is still
3198 * operating in an indoor environment.
3199 */
3200 spin_lock(&reg_indoor_lock);
3201 if (reg_is_indoor && !reg_is_indoor_portid) {
3202 reg_is_indoor = false;
3203 reg_check_channels();
3204 }
3205 spin_unlock(&reg_indoor_lock);
52616f2b 3206
2d319867 3207 reset_regdomains(true, &world_regdom);
09d989d1
LR		 3208 restore_alpha2(alpha2, reset_user);
3209
14609555
LR		 3210 /*
3211 * If there's any pending requests we simply
3212 * stash them to a temporary pending queue and
3213 * add then after we've restored regulatory
3214 * settings.
3215 */
3216 spin_lock(&reg_requests_lock);
eeca9fce 3217 list_splice_tail_init(&reg_requests_list, &tmp_reg_req_list);
14609555
LR		 3218 spin_unlock(&reg_requests_lock);
3219
09d989d1
LR		 3220 /* Clear beacon hints */
3221 spin_lock_bh(&reg_pending_beacons_lock);
fea9bced
JB		 3222 list_for_each_entry_safe(reg_beacon, btmp, &reg_pending_beacons, list) {
3223 list_del(&reg_beacon->list);
3224 kfree(reg_beacon);
09d989d1
LR		 3225 }
3226 spin_unlock_bh(&reg_pending_beacons_lock);
3227
fea9bced
JB		 3228 list_for_each_entry_safe(reg_beacon, btmp, &reg_beacon_list, list) {
3229 list_del(&reg_beacon->list);
3230 kfree(reg_beacon);
09d989d1
LR		 3231 }
3232
3233 /* First restore to the basic regulatory settings */
379b82f4
JB		 3234 world_alpha2[0] = cfg80211_world_regdom->alpha2[0];
3235 world_alpha2[1] = cfg80211_world_regdom->alpha2[1];
09d989d1 3236
5ce543d1 3237 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
b0d7aa59
JD		 3238 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
3239 continue;
a2f73b6c 3240 if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG)
5ce543d1
RM		 3241 restore_custom_reg_settings(&rdev->wiphy);
3242 }
3243
e646a025
JB		 3244 if (cached && (!is_an_alpha2(alpha2) ||
3245 !IS_ERR_OR_NULL(cfg80211_user_regdom))) {
3246 reset_regdomains(false, cfg80211_world_regdom);
3247 update_all_wiphy_regulatory(NL80211_REGDOM_SET_BY_CORE);
3248 print_regdomain(get_cfg80211_regdom());
3249 nl80211_send_reg_change_event(&core_request_world);
3250 reg_set_request_processed();
09d989d1 3251
e646a025
JB		 3252 if (is_an_alpha2(alpha2) &&
3253 !regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER)) {
3254 struct regulatory_request *ureq;
3255
3256 spin_lock(&reg_requests_lock);
3257 ureq = list_last_entry(&reg_requests_list,
3258 struct regulatory_request,
3259 list);
3260 list_del(&ureq->list);
3261 spin_unlock(&reg_requests_lock);
3262
3263 notify_self_managed_wiphys(ureq);
3264 reg_update_last_request(ureq);
3265 set_regdom(reg_copy_regd(cfg80211_user_regdom),
3266 REGD_SOURCE_CACHED);
3267 }
3268 } else {
3269 regulatory_hint_core(world_alpha2);
3270
3271 /*
3272 * This restores the ieee80211_regdom module parameter
3273 * preference or the last user requested regulatory
3274 * settings, user regulatory settings takes precedence.
3275 */
3276 if (is_an_alpha2(alpha2))
3277 regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER);
3278 }
09d989d1 3279
14609555 3280 spin_lock(&reg_requests_lock);
11cff96c 3281 list_splice_tail_init(&tmp_reg_req_list, &reg_requests_list);
14609555
LR		 3282 spin_unlock(&reg_requests_lock);
3283
c799ba6e 3284 pr_debug("Kicking the queue\n");
14609555
LR		 3285
3286 schedule_work(&reg_work);
3287}
09d989d1 3288
7417844b
RKS		 3289static bool is_wiphy_all_set_reg_flag(enum ieee80211_regulatory_flags flag)
3290{
3291 struct cfg80211_registered_device *rdev;
3292 struct wireless_dev *wdev;
3293
3294 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
3295 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
3296 wdev_lock(wdev);
3297 if (!(wdev->wiphy->regulatory_flags & flag)) {
3298 wdev_unlock(wdev);
3299 return false;
3300 }
3301 wdev_unlock(wdev);
3302 }
3303 }
3304
3305 return true;
3306}
3307
09d989d1
LR		 3308void regulatory_hint_disconnect(void)
3309{
7417844b
RKS		 3310 /* Restore of regulatory settings is not required when wiphy(s)
3311 * ignore IE from connected access point but clearance of beacon hints
3312 * is required when wiphy(s) supports beacon hints.
3313 */
3314 if (is_wiphy_all_set_reg_flag(REGULATORY_COUNTRY_IE_IGNORE)) {
3315 struct reg_beacon *reg_beacon, *btmp;
3316
3317 if (is_wiphy_all_set_reg_flag(REGULATORY_DISABLE_BEACON_HINTS))
3318 return;
3319
3320 spin_lock_bh(&reg_pending_beacons_lock);
3321 list_for_each_entry_safe(reg_beacon, btmp,
3322 &reg_pending_beacons, list) {
3323 list_del(&reg_beacon->list);
3324 kfree(reg_beacon);
3325 }
3326 spin_unlock_bh(&reg_pending_beacons_lock);
3327
3328 list_for_each_entry_safe(reg_beacon, btmp,
3329 &reg_beacon_list, list) {
3330 list_del(&reg_beacon->list);
3331 kfree(reg_beacon);
3332 }
3333
3334 return;
3335 }
3336
c799ba6e 3337 pr_debug("All devices are disconnected, going to restore regulatory settings\n");
e646a025 3338 restore_regulatory_settings(false, true);
09d989d1
LR		 3339}
3340
9cf0a0b4 3341static bool freq_is_chan_12_13_14(u32 freq)
e38f8a7a 3342{
57fbcce3
JB		 3343 if (freq == ieee80211_channel_to_frequency(12, NL80211_BAND_2GHZ) ||
3344 freq == ieee80211_channel_to_frequency(13, NL80211_BAND_2GHZ) ||
3345 freq == ieee80211_channel_to_frequency(14, NL80211_BAND_2GHZ))
e38f8a7a
LR		 3346 return true;
3347 return false;
3348}
3349
3ebfa6e7
LR		 3350static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan)
3351{
3352 struct reg_beacon *pending_beacon;
3353
3354 list_for_each_entry(pending_beacon, &reg_pending_beacons, list)
934f4c7d
TP		 3355 if (ieee80211_channel_equal(beacon_chan,
3356 &pending_beacon->chan))
3ebfa6e7
LR		 3357 return true;
3358 return false;
3359}
3360
e38f8a7a
LR		 3361int regulatory_hint_found_beacon(struct wiphy *wiphy,
3362 struct ieee80211_channel *beacon_chan,
3363 gfp_t gfp)
3364{
3365 struct reg_beacon *reg_beacon;
3ebfa6e7 3366 bool processing;
e38f8a7a 3367
1a919318
JB		 3368 if (beacon_chan->beacon_found ||
3369 beacon_chan->flags & IEEE80211_CHAN_RADAR ||
57fbcce3 3370 (beacon_chan->band == NL80211_BAND_2GHZ &&
1a919318 3371 !freq_is_chan_12_13_14(beacon_chan->center_freq)))
e38f8a7a
LR		 3372 return 0;
3373
3ebfa6e7
LR		 3374 spin_lock_bh(&reg_pending_beacons_lock);
3375 processing = pending_reg_beacon(beacon_chan);
3376 spin_unlock_bh(&reg_pending_beacons_lock);
3377
3378 if (processing)
e38f8a7a
LR		 3379 return 0;
3380
3381 reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp);
3382 if (!reg_beacon)
3383 return -ENOMEM;
3384
934f4c7d
TP		 3385 pr_debug("Found new beacon on frequency: %d.%03d MHz (Ch %d) on %s\n",
3386 beacon_chan->center_freq, beacon_chan->freq_offset,
3387 ieee80211_freq_khz_to_channel(
3388 ieee80211_channel_to_khz(beacon_chan)),
c799ba6e 3389 wiphy_name(wiphy));
4113f751 3390
e38f8a7a 3391 memcpy(&reg_beacon->chan, beacon_chan,
1a919318 3392 sizeof(struct ieee80211_channel));
e38f8a7a
LR		 3393
3394 /*
3395 * Since we can be called from BH or and non-BH context
3396 * we must use spin_lock_bh()
3397 */
3398 spin_lock_bh(&reg_pending_beacons_lock);
3399 list_add_tail(&reg_beacon->list, &reg_pending_beacons);
3400 spin_unlock_bh(&reg_pending_beacons_lock);
3401
3402 schedule_work(&reg_work);
3403
3404 return 0;
3405}
3406
a3d2eaf0 3407static void print_rd_rules(const struct ieee80211_regdomain *rd)
b2e1b302
LR		 3408{
3409 unsigned int i;
a3d2eaf0
JB		 3410 const struct ieee80211_reg_rule *reg_rule = NULL;
3411 const struct ieee80211_freq_range *freq_range = NULL;
3412 const struct ieee80211_power_rule *power_rule = NULL;
089027e5 3413 char bw[32], cac_time[32];
b2e1b302 3414
94c4fd64 3415 pr_debug(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
b2e1b302
LR		 3416
3417 for (i = 0; i < rd->n_reg_rules; i++) {
3418 reg_rule = &rd->reg_rules[i];
3419 freq_range = &reg_rule->freq_range;
3420 power_rule = &reg_rule->power_rule;
3421
b0dfd2ea
JD		 3422 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
3423 snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO",
3424 freq_range->max_bandwidth_khz,
97524820
JD		 3425 reg_get_max_bandwidth(rd, reg_rule));
3426 else
b0dfd2ea 3427 snprintf(bw, sizeof(bw), "%d KHz",
97524820
JD		 3428 freq_range->max_bandwidth_khz);
3429
089027e5
JD		 3430 if (reg_rule->flags & NL80211_RRF_DFS)
3431 scnprintf(cac_time, sizeof(cac_time), "%u s",
3432 reg_rule->dfs_cac_ms/1000);
3433 else
3434 scnprintf(cac_time, sizeof(cac_time), "N/A");
3435
3436
fb1fc7ad
LR		 3437 /*
3438 * There may not be documentation for max antenna gain
3439 * in certain regions
3440 */
b2e1b302 3441 if (power_rule->max_antenna_gain)
94c4fd64 3442 pr_debug(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
b2e1b302
LR		 3443 freq_range->start_freq_khz,
3444 freq_range->end_freq_khz,
97524820 3445 bw,
b2e1b302 3446 power_rule->max_antenna_gain,
089027e5
JD		 3447 power_rule->max_eirp,
3448 cac_time);
b2e1b302 3449 else
94c4fd64 3450 pr_debug(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
b2e1b302
LR		 3451 freq_range->start_freq_khz,
3452 freq_range->end_freq_khz,
97524820 3453 bw,
089027e5
JD		 3454 power_rule->max_eirp,
3455 cac_time);
b2e1b302
LR		 3456 }
3457}
3458
4c7d3982 3459bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region)
8b60b078
LR		 3460{
3461 switch (dfs_region) {
3462 case NL80211_DFS_UNSET:
3463 case NL80211_DFS_FCC:
3464 case NL80211_DFS_ETSI:
3465 case NL80211_DFS_JP:
3466 return true;
3467 default:
4a22b00b 3468 pr_debug("Ignoring unknown DFS master region: %d\n", dfs_region);
8b60b078
LR		 3469 return false;
3470 }
3471}
3472
a3d2eaf0 3473static void print_regdomain(const struct ieee80211_regdomain *rd)
b2e1b302 3474{
c492db37 3475 struct regulatory_request *lr = get_last_request();
b2e1b302 3476
3f2355cb 3477 if (is_intersected_alpha2(rd->alpha2)) {
c492db37 3478 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
79c97e97 3479 struct cfg80211_registered_device *rdev;
c492db37 3480 rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx);
79c97e97 3481 if (rdev) {
94c4fd64 3482 pr_debug("Current regulatory domain updated by AP to: %c%c\n",
79c97e97
JB		 3483 rdev->country_ie_alpha2[0],
3484 rdev->country_ie_alpha2[1]);
3f2355cb 3485 } else
94c4fd64 3486 pr_debug("Current regulatory domain intersected:\n");
3f2355cb 3487 } else
94c4fd64 3488 pr_debug("Current regulatory domain intersected:\n");
1a919318 3489 } else if (is_world_regdom(rd->alpha2)) {
94c4fd64 3490 pr_debug("World regulatory domain updated:\n");
1a919318 3491 } else {
b2e1b302 3492 if (is_unknown_alpha2(rd->alpha2))
94c4fd64 3493 pr_debug("Regulatory domain changed to driver built-in settings (unknown country)\n");
57b5ce07 3494 else {
c492db37 3495 if (reg_request_cell_base(lr))
94c4fd64 3496 pr_debug("Regulatory domain changed to country: %c%c by Cell Station\n",
57b5ce07
LR		 3497 rd->alpha2[0], rd->alpha2[1]);
3498 else
94c4fd64 3499 pr_debug("Regulatory domain changed to country: %c%c\n",
57b5ce07
LR		 3500 rd->alpha2[0], rd->alpha2[1]);
3501 }
b2e1b302 3502 }
1a919318 3503
94c4fd64 3504 pr_debug(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region));
b2e1b302
LR		 3505 print_rd_rules(rd);
3506}
3507
2df78167 3508static void print_regdomain_info(const struct ieee80211_regdomain *rd)
b2e1b302 3509{
94c4fd64 3510 pr_debug("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]);
b2e1b302
LR		 3511 print_rd_rules(rd);
3512}
3513
3b9e5aca
LR		 3514static int reg_set_rd_core(const struct ieee80211_regdomain *rd)
3515{
3516 if (!is_world_regdom(rd->alpha2))
3517 return -EINVAL;
3518 update_world_regdomain(rd);
3519 return 0;
3520}
3521
84721d44
LR		 3522static int reg_set_rd_user(const struct ieee80211_regdomain *rd,
3523 struct regulatory_request *user_request)
3524{
3525 const struct ieee80211_regdomain *intersected_rd = NULL;
3526
84721d44
LR		 3527 if (!regdom_changes(rd->alpha2))
3528 return -EALREADY;
3529
3530 if (!is_valid_rd(rd)) {
94c4fd64
DY		 3531 pr_err("Invalid regulatory domain detected: %c%c\n",
3532 rd->alpha2[0], rd->alpha2[1]);
84721d44
LR		 3533 print_regdomain_info(rd);
3534 return -EINVAL;
3535 }
3536
3537 if (!user_request->intersect) {
3538 reset_regdomains(false, rd);
3539 return 0;
3540 }
3541
3542 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
3543 if (!intersected_rd)
3544 return -EINVAL;
3545
3546 kfree(rd);
3547 rd = NULL;
3548 reset_regdomains(false, intersected_rd);
3549
3550 return 0;
3551}
3552
f5fe3247
LR		 3553static int reg_set_rd_driver(const struct ieee80211_regdomain *rd,
3554 struct regulatory_request *driver_request)
b2e1b302 3555{
e9763c3c 3556 const struct ieee80211_regdomain *regd;
9c96477d 3557 const struct ieee80211_regdomain *intersected_rd = NULL;
f5fe3247 3558 const struct ieee80211_regdomain *tmp;
806a9e39 3559 struct wiphy *request_wiphy;
6913b49a 3560
f5fe3247 3561 if (is_world_regdom(rd->alpha2))
b2e1b302
LR		 3562 return -EINVAL;
3563
f5fe3247
LR		 3564 if (!regdom_changes(rd->alpha2))
3565 return -EALREADY;
b2e1b302 3566
8375af3b 3567 if (!is_valid_rd(rd)) {
94c4fd64
DY		 3568 pr_err("Invalid regulatory domain detected: %c%c\n",
3569 rd->alpha2[0], rd->alpha2[1]);
8375af3b
LR		 3570 print_regdomain_info(rd);
3571 return -EINVAL;
b2e1b302
LR		 3572 }
3573
f5fe3247 3574 request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx);
922ec58c 3575 if (!request_wiphy)
de3584bd 3576 return -ENODEV;
806a9e39 3577
f5fe3247 3578 if (!driver_request->intersect) {
558f6d32
LR		 3579 if (request_wiphy->regd)
3580 return -EALREADY;
3e0c3ff3 3581
e9763c3c
JB		 3582 regd = reg_copy_regd(rd);
3583 if (IS_ERR(regd))
3584 return PTR_ERR(regd);
3e0c3ff3 3585
458f4f9e 3586 rcu_assign_pointer(request_wiphy->regd, regd);
379b82f4 3587 reset_regdomains(false, rd);
b8295acd
LR		 3588 return 0;
3589 }
3590
f5fe3247
LR		 3591 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
3592 if (!intersected_rd)
3593 return -EINVAL;
b8295acd 3594
f5fe3247
LR		 3595 /*
3596 * We can trash what CRDA provided now.
3597 * However if a driver requested this specific regulatory
3598 * domain we keep it for its private use
3599 */
3600 tmp = get_wiphy_regdom(request_wiphy);
3601 rcu_assign_pointer(request_wiphy->regd, rd);
3602 rcu_free_regdom(tmp);
b8295acd 3603
f5fe3247 3604 rd = NULL;
b7566fc3 3605
f5fe3247 3606 reset_regdomains(false, intersected_rd);
3e0c3ff3 3607
f5fe3247
LR		 3608 return 0;
3609}
3610
01992406
LR		 3611static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd,
3612 struct regulatory_request *country_ie_request)
f5fe3247
LR		 3613{
3614 struct wiphy *request_wiphy;
b8295acd 3615
f5fe3247
LR		 3616 if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
3617 !is_unknown_alpha2(rd->alpha2))
3618 return -EINVAL;
b8295acd 3619
f5fe3247
LR		 3620 /*
3621 * Lets only bother proceeding on the same alpha2 if the current
3622 * rd is non static (it means CRDA was present and was used last)
3623 * and the pending request came in from a country IE
3624 */
3625
3626 if (!is_valid_rd(rd)) {
94c4fd64
DY		 3627 pr_err("Invalid regulatory domain detected: %c%c\n",
3628 rd->alpha2[0], rd->alpha2[1]);
f5fe3247
LR		 3629 print_regdomain_info(rd);
3630 return -EINVAL;
9c96477d
LR		 3631 }
3632
01992406 3633 request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx);
922ec58c 3634 if (!request_wiphy)
f5fe3247 3635 return -ENODEV;
b2e1b302 3636
01992406 3637 if (country_ie_request->intersect)
f5fe3247
LR		 3638 return -EINVAL;
3639
3640 reset_regdomains(false, rd);
3641 return 0;
3642}
b2e1b302 3643
fb1fc7ad
LR		 3644/*
3645 * Use this call to set the current regulatory domain. Conflicts with
b2e1b302 3646 * multiple drivers can be ironed out later. Caller must've already
458f4f9e 3647 * kmalloc'd the rd structure.
fb1fc7ad 3648 */
c37722bd
I		 3649int set_regdom(const struct ieee80211_regdomain *rd,
3650 enum ieee80211_regd_source regd_src)
b2e1b302 3651{
c492db37 3652 struct regulatory_request *lr;
092008ab 3653 bool user_reset = false;
b2e1b302
LR		 3654 int r;
3655
e646a025
JB		 3656 if (IS_ERR_OR_NULL(rd))
3657 return -ENODATA;
3658
3b9e5aca
LR		 3659 if (!reg_is_valid_request(rd->alpha2)) {
3660 kfree(rd);
3661 return -EINVAL;
3662 }
3663
c37722bd 3664 if (regd_src == REGD_SOURCE_CRDA)
b6863036 3665 reset_crda_timeouts();
c37722bd 3666
c492db37 3667 lr = get_last_request();
abc7381b 3668
b2e1b302 3669 /* Note that this doesn't update the wiphys, this is done below */
3b9e5aca
LR		 3670 switch (lr->initiator) {
3671 case NL80211_REGDOM_SET_BY_CORE:
3672 r = reg_set_rd_core(rd);
3673 break;
3674 case NL80211_REGDOM_SET_BY_USER:
e646a025 3675 cfg80211_save_user_regdom(rd);
84721d44 3676 r = reg_set_rd_user(rd, lr);
092008ab 3677 user_reset = true;
84721d44 3678 break;
3b9e5aca 3679 case NL80211_REGDOM_SET_BY_DRIVER:
f5fe3247
LR		 3680 r = reg_set_rd_driver(rd, lr);
3681 break;
3b9e5aca 3682 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
01992406 3683 r = reg_set_rd_country_ie(rd, lr);
3b9e5aca
LR		 3684 break;
3685 default:
3686 WARN(1, "invalid initiator %d\n", lr->initiator);
09d11800 3687 kfree(rd);
3b9e5aca
LR		 3688 return -EINVAL;
3689 }
3690
d2372b31 3691 if (r) {
092008ab
JD		 3692 switch (r) {
3693 case -EALREADY:
95908535 3694 reg_set_request_processed();
092008ab
JD		 3695 break;
3696 default:
3697 /* Back to world regulatory in case of errors */
e646a025 3698 restore_regulatory_settings(user_reset, false);
092008ab 3699 }
95908535 3700
d2372b31 3701 kfree(rd);
38fd2143 3702 return r;
d2372b31 3703 }
b2e1b302 3704
b2e1b302 3705 /* This would make this whole thing pointless */
38fd2143
JB		 3706 if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom()))
3707 return -EINVAL;
b2e1b302
LR		 3708
3709 /* update all wiphys now with the new established regulatory domain */
c492db37 3710 update_all_wiphy_regulatory(lr->initiator);
b2e1b302 3711
458f4f9e 3712 print_regdomain(get_cfg80211_regdom());
b2e1b302 3713
c492db37 3714 nl80211_send_reg_change_event(lr);
73d54c9e 3715
b2e253cf
LR		 3716 reg_set_request_processed();
3717
38fd2143 3718 return 0;
b2e1b302
LR		 3719}
3720
2c3e861c
AN		 3721static int __regulatory_set_wiphy_regd(struct wiphy *wiphy,
3722 struct ieee80211_regdomain *rd)
b0d7aa59
JD		 3723{
3724 const struct ieee80211_regdomain *regd;
3725 const struct ieee80211_regdomain *prev_regd;
3726 struct cfg80211_registered_device *rdev;
3727
3728 if (WARN_ON(!wiphy || !rd))
3729 return -EINVAL;
3730
3731 if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED),
3732 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
3733 return -EPERM;
3734
3735 if (WARN(!is_valid_rd(rd), "Invalid regulatory domain detected\n")) {
3736 print_regdomain_info(rd);
3737 return -EINVAL;
3738 }
3739
3740 regd = reg_copy_regd(rd);
3741 if (IS_ERR(regd))
3742 return PTR_ERR(regd);
3743
3744 rdev = wiphy_to_rdev(wiphy);
3745
3746 spin_lock(&reg_requests_lock);
3747 prev_regd = rdev->requested_regd;
3748 rdev->requested_regd = regd;
3749 spin_unlock(&reg_requests_lock);
3750
3751 kfree(prev_regd);
2c3e861c
AN		 3752 return 0;
3753}
3754
3755int regulatory_set_wiphy_regd(struct wiphy *wiphy,
3756 struct ieee80211_regdomain *rd)
3757{
3758 int ret = __regulatory_set_wiphy_regd(wiphy, rd);
3759
3760 if (ret)
3761 return ret;
b0d7aa59
JD		 3762
3763 schedule_work(&reg_work);
3764 return 0;
3765}
3766EXPORT_SYMBOL(regulatory_set_wiphy_regd);
3767
2c3e861c
AN		 3768int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy *wiphy,
3769 struct ieee80211_regdomain *rd)
3770{
3771 int ret;
3772
3773 ASSERT_RTNL();
3774
3775 ret = __regulatory_set_wiphy_regd(wiphy, rd);
3776 if (ret)
3777 return ret;
3778
3779 /* process the request immediately */
3780 reg_process_self_managed_hints();
3781 return 0;
3782}
3783EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl);
3784
57b5ce07
LR		 3785void wiphy_regulatory_register(struct wiphy *wiphy)
3786{
aced43ce 3787 struct regulatory_request *lr = get_last_request();
23df0b73 3788
aced43ce
AS		 3789 /* self-managed devices ignore beacon hints and country IE */
3790 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
b0d7aa59
JD		 3791 wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS |
3792 REGULATORY_COUNTRY_IE_IGNORE;
3793
aced43ce
AS		 3794 /*
3795 * The last request may have been received before this
3796 * registration call. Call the driver notifier if
8772eed9 3797 * initiator is USER.
aced43ce 3798 */
8772eed9 3799 if (lr->initiator == NL80211_REGDOM_SET_BY_USER)
aced43ce
AS		 3800 reg_call_notifier(wiphy, lr);
3801 }
3802
57b5ce07
LR		 3803 if (!reg_dev_ignore_cell_hint(wiphy))
3804 reg_num_devs_support_basehint++;
3805
23df0b73 3806 wiphy_update_regulatory(wiphy, lr->initiator);
89766727 3807 wiphy_all_share_dfs_chan_state(wiphy);
57b5ce07
LR		 3808}
3809
bfead080 3810void wiphy_regulatory_deregister(struct wiphy *wiphy)
3f2355cb 3811{
0ad8acaf 3812 struct wiphy *request_wiphy = NULL;
c492db37 3813 struct regulatory_request *lr;
761cf7ec 3814
c492db37 3815 lr = get_last_request();
abc7381b 3816
57b5ce07
LR		 3817 if (!reg_dev_ignore_cell_hint(wiphy))
3818 reg_num_devs_support_basehint--;
3819
458f4f9e 3820 rcu_free_regdom(get_wiphy_regdom(wiphy));
34dd886c 3821 RCU_INIT_POINTER(wiphy->regd, NULL);
0ef9ccdd 3822
c492db37
JB		 3823 if (lr)
3824 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
806a9e39 3825
0ef9ccdd 3826 if (!request_wiphy || request_wiphy != wiphy)
38fd2143 3827 return;
0ef9ccdd 3828
c492db37
JB		 3829 lr->wiphy_idx = WIPHY_IDX_INVALID;
3830 lr->country_ie_env = ENVIRON_ANY;
3f2355cb
LR		 3831}
3832
174e0cd2 3833/*
f89769cf
AS		 3834 * See FCC notices for UNII band definitions
3835 * 5GHz: https://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii
3836 * 6GHz: https://www.fcc.gov/document/fcc-proposes-more-spectrum-unlicensed-use-0
174e0cd2
IP		 3837 */
3838int cfg80211_get_unii(int freq)
3839{
3840 /* UNII-1 */
3841 if (freq >= 5150 && freq <= 5250)
3842 return 0;
3843
3844 /* UNII-2A */
3845 if (freq > 5250 && freq <= 5350)
3846 return 1;
3847
3848 /* UNII-2B */
3849 if (freq > 5350 && freq <= 5470)
3850 return 2;
3851
3852 /* UNII-2C */
3853 if (freq > 5470 && freq <= 5725)
3854 return 3;
3855
3856 /* UNII-3 */
3857 if (freq > 5725 && freq <= 5825)
3858 return 4;
3859
f89769cf
AS		 3860 /* UNII-5 */
3861 if (freq > 5925 && freq <= 6425)
3862 return 5;
3863
3864 /* UNII-6 */
3865 if (freq > 6425 && freq <= 6525)
3866 return 6;
3867
3868 /* UNII-7 */
3869 if (freq > 6525 && freq <= 6875)
3870 return 7;
3871
3872 /* UNII-8 */
3873 if (freq > 6875 && freq <= 7125)
3874 return 8;
3875
174e0cd2
IP		 3876 return -EINVAL;
3877}
3878
c8866e55
IP		 3879bool regulatory_indoor_allowed(void)
3880{
3881 return reg_is_indoor;
3882}
3883
b35a51c7
VT		 3884bool regulatory_pre_cac_allowed(struct wiphy *wiphy)
3885{
3886 const struct ieee80211_regdomain *regd = NULL;
3887 const struct ieee80211_regdomain *wiphy_regd = NULL;
3888 bool pre_cac_allowed = false;
3889
3890 rcu_read_lock();
3891
3892 regd = rcu_dereference(cfg80211_regdomain);
3893 wiphy_regd = rcu_dereference(wiphy->regd);
3894 if (!wiphy_regd) {
3895 if (regd->dfs_region == NL80211_DFS_ETSI)
3896 pre_cac_allowed = true;
3897
3898 rcu_read_unlock();
3899
3900 return pre_cac_allowed;
3901 }
3902
3903 if (regd->dfs_region == wiphy_regd->dfs_region &&
3904 wiphy_regd->dfs_region == NL80211_DFS_ETSI)
3905 pre_cac_allowed = true;
3906
3907 rcu_read_unlock();
3908
3909 return pre_cac_allowed;
3910}
dc0c18ed 3911EXPORT_SYMBOL(regulatory_pre_cac_allowed);
b35a51c7 3912
26ec17a1
OM		 3913static void cfg80211_check_and_end_cac(struct cfg80211_registered_device *rdev)
3914{
3915 struct wireless_dev *wdev;
3916 /* If we finished CAC or received radar, we should end any
3917 * CAC running on the same channels.
3918 * the check !cfg80211_chandef_dfs_usable contain 2 options:
3919 * either all channels are available - those the CAC_FINISHED
3920 * event has effected another wdev state, or there is a channel
3921 * in unavailable state in wdev chandef - those the RADAR_DETECTED
3922 * event has effected another wdev state.
3923 * In both cases we should end the CAC on the wdev.
3924 */
3925 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
3926 if (wdev->cac_started &&
3927 !cfg80211_chandef_dfs_usable(&rdev->wiphy, &wdev->chandef))
3928 rdev_end_cac(rdev, wdev->netdev);
3929 }
3930}
3931
89766727
VT		 3932void regulatory_propagate_dfs_state(struct wiphy *wiphy,
3933 struct cfg80211_chan_def *chandef,
3934 enum nl80211_dfs_state dfs_state,
3935 enum nl80211_radar_event event)
3936{
3937 struct cfg80211_registered_device *rdev;
3938
3939 ASSERT_RTNL();
3940
3941 if (WARN_ON(!cfg80211_chandef_valid(chandef)))
3942 return;
3943
89766727
VT		 3944 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
3945 if (wiphy == &rdev->wiphy)
3946 continue;
3947
3948 if (!reg_dfs_domain_same(wiphy, &rdev->wiphy))
3949 continue;
3950
3951 if (!ieee80211_get_channel(&rdev->wiphy,
3952 chandef->chan->center_freq))
3953 continue;
3954
3955 cfg80211_set_dfs_state(&rdev->wiphy, chandef, dfs_state);
3956
3957 if (event == NL80211_RADAR_DETECTED ||
26ec17a1 3958 event == NL80211_RADAR_CAC_FINISHED) {
89766727 3959 cfg80211_sched_dfs_chan_update(rdev);
26ec17a1
OM		 3960 cfg80211_check_and_end_cac(rdev);
3961 }
89766727
VT		 3962
3963 nl80211_radar_notify(rdev, chandef, event, NULL, GFP_KERNEL);
3964 }
3965}
3966
d7be102f 3967static int __init regulatory_init_db(void)
b2e1b302 3968{
d7be102f 3969 int err;
734366de 3970
71e5e886
JB		 3971 /*
3972 * It's possible that - due to other bugs/issues - cfg80211
3973 * never called regulatory_init() below, or that it failed;
3974 * in that case, don't try to do any further work here as
3975 * it's doomed to lead to crashes.
3976 */
3977 if (IS_ERR_OR_NULL(reg_pdev))
3978 return -EINVAL;
3979
90a53e44
JB		 3980 err = load_builtin_regdb_keys();
3981 if (err)
3982 return err;
3983
ae9e4b0d 3984 /* We always try to get an update for the static regdomain */
458f4f9e 3985 err = regulatory_hint_core(cfg80211_world_regdom->alpha2);
ba25c141 3986 if (err) {
09d11800
OO		 3987 if (err == -ENOMEM) {
3988 platform_device_unregister(reg_pdev);
bcf4f99b 3989 return err;
09d11800 3990 }
bcf4f99b
LR		 3991 /*
3992 * N.B. kobject_uevent_env() can fail mainly for when we're out
3993 * memory which is handled and propagated appropriately above
3994 * but it can also fail during a netlink_broadcast() or during
3995 * early boot for call_usermodehelper(). For now treat these
3996 * errors as non-fatal.
3997 */
e9c0268f 3998 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
bcf4f99b 3999 }
734366de 4000
ae9e4b0d
LR		 4001 /*
4002 * Finally, if the user set the module parameter treat it
4003 * as a user hint.
4004 */
4005 if (!is_world_regdom(ieee80211_regdom))
57b5ce07
LR		 4006 regulatory_hint_user(ieee80211_regdom,
4007 NL80211_USER_REG_HINT_USER);
ae9e4b0d 4008
b2e1b302
LR		 4009 return 0;
4010}
d7be102f
JB		 4011#ifndef MODULE
4012late_initcall(regulatory_init_db);
4013#endif
4014
4015int __init regulatory_init(void)
4016{
4017 reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
4018 if (IS_ERR(reg_pdev))
4019 return PTR_ERR(reg_pdev);
4020
4021 spin_lock_init(&reg_requests_lock);
4022 spin_lock_init(&reg_pending_beacons_lock);
4023 spin_lock_init(&reg_indoor_lock);
4024
4025 rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom);
4026
4027 user_alpha2[0] = '9';
4028 user_alpha2[1] = '7';
4029
4030#ifdef MODULE
4031 return regulatory_init_db();
4032#else
4033 return 0;
4034#endif
4035}
b2e1b302 4036
1a919318 4037void regulatory_exit(void)
b2e1b302 4038{
fe33eb39 4039 struct regulatory_request *reg_request, *tmp;
e38f8a7a 4040 struct reg_beacon *reg_beacon, *btmp;
fe33eb39
LR		 4041
4042 cancel_work_sync(&reg_work);
b6863036 4043 cancel_crda_timeout_sync();
ad932f04 4044 cancel_delayed_work_sync(&reg_check_chans);
fe33eb39 4045
9027b149 4046 /* Lock to suppress warnings */
38fd2143 4047 rtnl_lock();
379b82f4 4048 reset_regdomains(true, NULL);
38fd2143 4049 rtnl_unlock();
734366de 4050
58ebacc6 4051 dev_set_uevent_suppress(&reg_pdev->dev, true);
f6037d09 4052
b2e1b302 4053 platform_device_unregister(reg_pdev);
734366de 4054
fea9bced
JB		 4055 list_for_each_entry_safe(reg_beacon, btmp, &reg_pending_beacons, list) {
4056 list_del(&reg_beacon->list);
4057 kfree(reg_beacon);
e38f8a7a 4058 }
e38f8a7a 4059
fea9bced
JB		 4060 list_for_each_entry_safe(reg_beacon, btmp, &reg_beacon_list, list) {
4061 list_del(&reg_beacon->list);
4062 kfree(reg_beacon);
e38f8a7a
LR		 4063 }
4064
fea9bced
JB		 4065 list_for_each_entry_safe(reg_request, tmp, &reg_requests_list, list) {
4066 list_del(&reg_request->list);
4067 kfree(reg_request);
fe33eb39 4068 }
007f6c5e
JB		 4069
4070 if (!IS_ERR_OR_NULL(regdb))
4071 kfree(regdb);
e646a025
JB		 4072 if (!IS_ERR_OR_NULL(cfg80211_user_regdom))
4073 kfree(cfg80211_user_regdom);
90a53e44
JB		 4074
4075 free_regdb_keyring();
8318d78a 4076}
Linux 6.x block layer and io_uring tree(s)