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mac80211: Increase MAX_MSG_LEN
[linux-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;
38cb87ee 430 int size_of_regd;
3b377ea9
JL		 431 unsigned int i;
432
82f20856
JB		 433 size_of_regd =
434 sizeof(struct ieee80211_regdomain) +
435 src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule);
3b377ea9 436
38cb87ee 437 regd = kzalloc(size_of_regd, GFP_KERNEL);
3b377ea9 438 if (!regd)
e9763c3c 439 return ERR_PTR(-ENOMEM);
3b377ea9
JL		 440
441 memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain));
442
38cb87ee 443 for (i = 0; i < src_regd->n_reg_rules; i++)
3b377ea9 444 memcpy(&regd->reg_rules[i], &src_regd->reg_rules[i],
e9763c3c 445 sizeof(struct ieee80211_reg_rule));
3b377ea9 446
e9763c3c 447 return regd;
3b377ea9
JL		 448}
449
e646a025
JB		 450static void cfg80211_save_user_regdom(const struct ieee80211_regdomain *rd)
451{
452 ASSERT_RTNL();
453
454 if (!IS_ERR(cfg80211_user_regdom))
455 kfree(cfg80211_user_regdom);
456 cfg80211_user_regdom = reg_copy_regd(rd);
457}
458
c7d319e5 459struct reg_regdb_apply_request {
3b377ea9 460 struct list_head list;
c7d319e5 461 const struct ieee80211_regdomain *regdom;
3b377ea9
JL		 462};
463
c7d319e5
JB		 464static LIST_HEAD(reg_regdb_apply_list);
465static DEFINE_MUTEX(reg_regdb_apply_mutex);
3b377ea9 466
c7d319e5 467static void reg_regdb_apply(struct work_struct *work)
3b377ea9 468{
c7d319e5 469 struct reg_regdb_apply_request *request;
a85d0d7f 470
5fe231e8 471 rtnl_lock();
3b377ea9 472
c7d319e5
JB		 473 mutex_lock(&reg_regdb_apply_mutex);
474 while (!list_empty(&reg_regdb_apply_list)) {
475 request = list_first_entry(&reg_regdb_apply_list,
476 struct reg_regdb_apply_request,
3b377ea9
JL		 477 list);
478 list_del(&request->list);
479
c7d319e5 480 set_regdom(request->regdom, REGD_SOURCE_INTERNAL_DB);
3b377ea9
JL		 481 kfree(request);
482 }
c7d319e5 483 mutex_unlock(&reg_regdb_apply_mutex);
a85d0d7f 484
5fe231e8 485 rtnl_unlock();
3b377ea9
JL		 486}
487
c7d319e5 488static DECLARE_WORK(reg_regdb_work, reg_regdb_apply);
3b377ea9 489
007f6c5e 490static int reg_schedule_apply(const struct ieee80211_regdomain *regdom)
3b377ea9 491{
c7d319e5 492 struct reg_regdb_apply_request *request;
3b377ea9 493
c7d319e5 494 request = kzalloc(sizeof(struct reg_regdb_apply_request), GFP_KERNEL);
007f6c5e
JB		 495 if (!request) {
496 kfree(regdom);
c7d319e5
JB		 497 return -ENOMEM;
498 }
3b377ea9 499
007f6c5e
JB		 500 request->regdom = regdom;
501
c7d319e5
JB		 502 mutex_lock(&reg_regdb_apply_mutex);
503 list_add_tail(&request->list, &reg_regdb_apply_list);
504 mutex_unlock(&reg_regdb_apply_mutex);
3b377ea9
JL		 505
506 schedule_work(&reg_regdb_work);
c7d319e5 507 return 0;
3b377ea9 508}
80007efe 509
b6863036
JB		 510#ifdef CONFIG_CFG80211_CRDA_SUPPORT
511/* Max number of consecutive attempts to communicate with CRDA */
512#define REG_MAX_CRDA_TIMEOUTS 10
513
514static u32 reg_crda_timeouts;
515
516static void crda_timeout_work(struct work_struct *work);
517static DECLARE_DELAYED_WORK(crda_timeout, crda_timeout_work);
518
519static void crda_timeout_work(struct work_struct *work)
520{
c799ba6e 521 pr_debug("Timeout while waiting for CRDA to reply, restoring regulatory settings\n");
b6863036
JB		 522 rtnl_lock();
523 reg_crda_timeouts++;
e646a025 524 restore_regulatory_settings(true, false);
b6863036
JB		 525 rtnl_unlock();
526}
527
528static void cancel_crda_timeout(void)
529{
530 cancel_delayed_work(&crda_timeout);
531}
532
533static void cancel_crda_timeout_sync(void)
534{
535 cancel_delayed_work_sync(&crda_timeout);
536}
537
538static void reset_crda_timeouts(void)
539{
540 reg_crda_timeouts = 0;
541}
542
fb1fc7ad
LR		 543/*
544 * This lets us keep regulatory code which is updated on a regulatory
1226d258 545 * basis in userspace.
fb1fc7ad 546 */
b2e1b302
LR		 547static int call_crda(const char *alpha2)
548{
1226d258
JB		 549 char country[12];
550 char *env[] = { country, NULL };
c7d319e5 551 int ret;
1226d258
JB		 552
553 snprintf(country, sizeof(country), "COUNTRY=%c%c",
554 alpha2[0], alpha2[1]);
555
c37722bd 556 if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) {
042ab5fc 557 pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n");
c37722bd
I		 558 return -EINVAL;
559 }
560
b2e1b302 561 if (!is_world_regdom((char *) alpha2))
042ab5fc 562 pr_debug("Calling CRDA for country: %c%c\n",
c799ba6e 563 alpha2[0], alpha2[1]);
b2e1b302 564 else
042ab5fc 565 pr_debug("Calling CRDA to update world regulatory domain\n");
b2e1b302 566
c7d319e5
JB		 567 ret = kobject_uevent_env(&reg_pdev->dev.kobj, KOBJ_CHANGE, env);
568 if (ret)
569 return ret;
570
571 queue_delayed_work(system_power_efficient_wq,
b6863036 572 &crda_timeout, msecs_to_jiffies(3142));
c7d319e5 573 return 0;
b2e1b302 574}
b6863036
JB		 575#else
576static inline void cancel_crda_timeout(void) {}
577static inline void cancel_crda_timeout_sync(void) {}
578static inline void reset_crda_timeouts(void) {}
579static inline int call_crda(const char *alpha2)
580{
581 return -ENODATA;
582}
583#endif /* CONFIG_CFG80211_CRDA_SUPPORT */
b2e1b302 584
007f6c5e
JB		 585/* code to directly load a firmware database through request_firmware */
586static const struct fwdb_header *regdb;
587
588struct fwdb_country {
589 u8 alpha2[2];
590 __be16 coll_ptr;
591 /* this struct cannot be extended */
592} __packed __aligned(4);
593
594struct fwdb_collection {
595 u8 len;
596 u8 n_rules;
597 u8 dfs_region;
598 /* no optional data yet */
599 /* aligned to 2, then followed by __be16 array of rule pointers */
600} __packed __aligned(4);
601
602enum fwdb_flags {
603 FWDB_FLAG_NO_OFDM = BIT(0),
604 FWDB_FLAG_NO_OUTDOOR = BIT(1),
605 FWDB_FLAG_DFS = BIT(2),
606 FWDB_FLAG_NO_IR = BIT(3),
607 FWDB_FLAG_AUTO_BW = BIT(4),
608};
609
230ebaa1
HD		 610struct fwdb_wmm_ac {
611 u8 ecw;
612 u8 aifsn;
613 __be16 cot;
614} __packed;
615
616struct fwdb_wmm_rule {
617 struct fwdb_wmm_ac client[IEEE80211_NUM_ACS];
618 struct fwdb_wmm_ac ap[IEEE80211_NUM_ACS];
619} __packed;
620
007f6c5e
JB		 621struct fwdb_rule {
622 u8 len;
623 u8 flags;
624 __be16 max_eirp;
625 __be32 start, end, max_bw;
626 /* start of optional data */
627 __be16 cac_timeout;
230ebaa1 628 __be16 wmm_ptr;
007f6c5e
JB		 629} __packed __aligned(4);
630
631#define FWDB_MAGIC 0x52474442
632#define FWDB_VERSION 20
633
634struct fwdb_header {
635 __be32 magic;
636 __be32 version;
637 struct fwdb_country country[];
638} __packed __aligned(4);
639
230ebaa1
HD		 640static int ecw2cw(int ecw)
641{
642 return (1 << ecw) - 1;
643}
644
645static bool valid_wmm(struct fwdb_wmm_rule *rule)
646{
647 struct fwdb_wmm_ac *ac = (struct fwdb_wmm_ac *)rule;
648 int i;
649
650 for (i = 0; i < IEEE80211_NUM_ACS * 2; i++) {
651 u16 cw_min = ecw2cw((ac[i].ecw & 0xf0) >> 4);
652 u16 cw_max = ecw2cw(ac[i].ecw & 0x0f);
653 u8 aifsn = ac[i].aifsn;
654
655 if (cw_min >= cw_max)
656 return false;
657
658 if (aifsn < 1)
659 return false;
660 }
661
662 return true;
663}
664
007f6c5e
JB		 665static bool valid_rule(const u8 *data, unsigned int size, u16 rule_ptr)
666{
667 struct fwdb_rule *rule = (void *)(data + (rule_ptr << 2));
668
669 if ((u8 *)rule + sizeof(rule->len) > data + size)
670 return false;
671
672 /* mandatory fields */
673 if (rule->len < offsetofend(struct fwdb_rule, max_bw))
674 return false;
230ebaa1
HD		 675 if (rule->len >= offsetofend(struct fwdb_rule, wmm_ptr)) {
676 u32 wmm_ptr = be16_to_cpu(rule->wmm_ptr) << 2;
677 struct fwdb_wmm_rule *wmm;
678
679 if (wmm_ptr + sizeof(struct fwdb_wmm_rule) > size)
680 return false;
007f6c5e 681
230ebaa1
HD		 682 wmm = (void *)(data + wmm_ptr);
683
684 if (!valid_wmm(wmm))
685 return false;
686 }
007f6c5e
JB		 687 return true;
688}
689
690static bool valid_country(const u8 *data, unsigned int size,
691 const struct fwdb_country *country)
692{
693 unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
694 struct fwdb_collection *coll = (void *)(data + ptr);
695 __be16 *rules_ptr;
696 unsigned int i;
697
698 /* make sure we can read len/n_rules */
699 if ((u8 *)coll + offsetofend(typeof(*coll), n_rules) > data + size)
700 return false;
701
702 /* make sure base struct and all rules fit */
703 if ((u8 *)coll + ALIGN(coll->len, 2) +
704 (coll->n_rules * 2) > data + size)
705 return false;
706
707 /* mandatory fields must exist */
708 if (coll->len < offsetofend(struct fwdb_collection, dfs_region))
709 return false;
710
711 rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
712
713 for (i = 0; i < coll->n_rules; i++) {
714 u16 rule_ptr = be16_to_cpu(rules_ptr[i]);
715
716 if (!valid_rule(data, size, rule_ptr))
717 return false;
718 }
719
720 return true;
721}
722
90a53e44
JB		 723#ifdef CONFIG_CFG80211_REQUIRE_SIGNED_REGDB
724static struct key *builtin_regdb_keys;
725
726static void __init load_keys_from_buffer(const u8 *p, unsigned int buflen)
727{
728 const u8 *end = p + buflen;
729 size_t plen;
730 key_ref_t key;
731
732 while (p < end) {
733 /* Each cert begins with an ASN.1 SEQUENCE tag and must be more
734 * than 256 bytes in size.
735 */
736 if (end - p < 4)
737 goto dodgy_cert;
738 if (p[0] != 0x30 &&
739 p[1] != 0x82)
740 goto dodgy_cert;
741 plen = (p[2] << 8) | p[3];
742 plen += 4;
743 if (plen > end - p)
744 goto dodgy_cert;
745
746 key = key_create_or_update(make_key_ref(builtin_regdb_keys, 1),
747 "asymmetric", NULL, p, plen,
748 ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
749 KEY_USR_VIEW | KEY_USR_READ),
750 KEY_ALLOC_NOT_IN_QUOTA |
751 KEY_ALLOC_BUILT_IN |
752 KEY_ALLOC_BYPASS_RESTRICTION);
753 if (IS_ERR(key)) {
754 pr_err("Problem loading in-kernel X.509 certificate (%ld)\n",
755 PTR_ERR(key));
756 } else {
757 pr_notice("Loaded X.509 cert '%s'\n",
758 key_ref_to_ptr(key)->description);
759 key_ref_put(key);
760 }
761 p += plen;
762 }
763
764 return;
765
766dodgy_cert:
767 pr_err("Problem parsing in-kernel X.509 certificate list\n");
768}
769
770static int __init load_builtin_regdb_keys(void)
771{
772 builtin_regdb_keys =
773 keyring_alloc(".builtin_regdb_keys",
774 KUIDT_INIT(0), KGIDT_INIT(0), current_cred(),
775 ((KEY_POS_ALL & ~KEY_POS_SETATTR) |
776 KEY_USR_VIEW | KEY_USR_READ | KEY_USR_SEARCH),
777 KEY_ALLOC_NOT_IN_QUOTA, NULL, NULL);
778 if (IS_ERR(builtin_regdb_keys))
779 return PTR_ERR(builtin_regdb_keys);
780
781 pr_notice("Loading compiled-in X.509 certificates for regulatory database\n");
782
783#ifdef CONFIG_CFG80211_USE_KERNEL_REGDB_KEYS
784 load_keys_from_buffer(shipped_regdb_certs, shipped_regdb_certs_len);
785#endif
88230ef1 786#ifdef CONFIG_CFG80211_EXTRA_REGDB_KEYDIR
90a53e44
JB		 787 if (CONFIG_CFG80211_EXTRA_REGDB_KEYDIR[0] != '\0')
788 load_keys_from_buffer(extra_regdb_certs, extra_regdb_certs_len);
789#endif
790
791 return 0;
792}
793
794static bool regdb_has_valid_signature(const u8 *data, unsigned int size)
795{
796 const struct firmware *sig;
797 bool result;
798
799 if (request_firmware(&sig, "regulatory.db.p7s", &reg_pdev->dev))
800 return false;
801
802 result = verify_pkcs7_signature(data, size, sig->data, sig->size,
803 builtin_regdb_keys,
804 VERIFYING_UNSPECIFIED_SIGNATURE,
805 NULL, NULL) == 0;
806
807 release_firmware(sig);
808
809 return result;
810}
811
812static void free_regdb_keyring(void)
813{
814 key_put(builtin_regdb_keys);
815}
816#else
817static int load_builtin_regdb_keys(void)
818{
819 return 0;
820}
821
822static bool regdb_has_valid_signature(const u8 *data, unsigned int size)
823{
824 return true;
825}
826
827static void free_regdb_keyring(void)
828{
829}
830#endif /* CONFIG_CFG80211_REQUIRE_SIGNED_REGDB */
831
007f6c5e
JB		 832static bool valid_regdb(const u8 *data, unsigned int size)
833{
834 const struct fwdb_header *hdr = (void *)data;
835 const struct fwdb_country *country;
836
837 if (size < sizeof(*hdr))
838 return false;
839
840 if (hdr->magic != cpu_to_be32(FWDB_MAGIC))
841 return false;
842
843 if (hdr->version != cpu_to_be32(FWDB_VERSION))
844 return false;
845
90a53e44
JB		 846 if (!regdb_has_valid_signature(data, size))
847 return false;
848
007f6c5e
JB		 849 country = &hdr->country[0];
850 while ((u8 *)(country + 1) <= data + size) {
851 if (!country->coll_ptr)
852 break;
853 if (!valid_country(data, size, country))
854 return false;
855 country++;
856 }
857
858 return true;
859}
860
014f5a25
SG		 861static void set_wmm_rule(const struct fwdb_header *db,
862 const struct fwdb_country *country,
863 const struct fwdb_rule *rule,
864 struct ieee80211_reg_rule *rrule)
865{
866 struct ieee80211_wmm_rule *wmm_rule = &rrule->wmm_rule;
867 struct fwdb_wmm_rule *wmm;
868 unsigned int i, wmm_ptr;
869
870 wmm_ptr = be16_to_cpu(rule->wmm_ptr) << 2;
871 wmm = (void *)((u8 *)db + wmm_ptr);
872
873 if (!valid_wmm(wmm)) {
874 pr_err("Invalid regulatory WMM rule %u-%u in domain %c%c\n",
875 be32_to_cpu(rule->start), be32_to_cpu(rule->end),
876 country->alpha2[0], country->alpha2[1]);
877 return;
878 }
230ebaa1
HD		 879
880 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
014f5a25 881 wmm_rule->client[i].cw_min =
230ebaa1 882 ecw2cw((wmm->client[i].ecw & 0xf0) >> 4);
014f5a25
SG		 883 wmm_rule->client[i].cw_max = ecw2cw(wmm->client[i].ecw & 0x0f);
884 wmm_rule->client[i].aifsn = wmm->client[i].aifsn;
885 wmm_rule->client[i].cot =
886 1000 * be16_to_cpu(wmm->client[i].cot);
887 wmm_rule->ap[i].cw_min = ecw2cw((wmm->ap[i].ecw & 0xf0) >> 4);
888 wmm_rule->ap[i].cw_max = ecw2cw(wmm->ap[i].ecw & 0x0f);
889 wmm_rule->ap[i].aifsn = wmm->ap[i].aifsn;
890 wmm_rule->ap[i].cot = 1000 * be16_to_cpu(wmm->ap[i].cot);
230ebaa1 891 }
38cb87ee
SG		 892
893 rrule->has_wmm = true;
230ebaa1
HD		 894}
895
19d3577e
HD		 896static int __regdb_query_wmm(const struct fwdb_header *db,
897 const struct fwdb_country *country, int freq,
014f5a25 898 struct ieee80211_reg_rule *rrule)
19d3577e
HD		 899{
900 unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
901 struct fwdb_collection *coll = (void *)((u8 *)db + ptr);
902 int i;
903
904 for (i = 0; i < coll->n_rules; i++) {
905 __be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
906 unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2;
014f5a25 907 struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr);
19d3577e 908
014f5a25 909 if (rule->len < offsetofend(struct fwdb_rule, wmm_ptr))
19d3577e
HD		 910 continue;
911
014f5a25
SG		 912 if (freq >= KHZ_TO_MHZ(be32_to_cpu(rule->start)) &&
913 freq <= KHZ_TO_MHZ(be32_to_cpu(rule->end))) {
914 set_wmm_rule(db, country, rule, rrule);
19d3577e
HD		 915 return 0;
916 }
917 }
918
919 return -ENODATA;
920}
921
38cb87ee 922int reg_query_regdb_wmm(char *alpha2, int freq, struct ieee80211_reg_rule *rule)
19d3577e
HD		 923{
924 const struct fwdb_header *hdr = regdb;
925 const struct fwdb_country *country;
926
5247a77c
HD		 927 if (!regdb)
928 return -ENODATA;
929
19d3577e
HD		 930 if (IS_ERR(regdb))
931 return PTR_ERR(regdb);
932
933 country = &hdr->country[0];
934 while (country->coll_ptr) {
935 if (alpha2_equal(alpha2, country->alpha2))
38cb87ee 936 return __regdb_query_wmm(regdb, country, freq, rule);
19d3577e
HD		 937
938 country++;
939 }
940
941 return -ENODATA;
942}
943EXPORT_SYMBOL(reg_query_regdb_wmm);
944
007f6c5e
JB		 945static int regdb_query_country(const struct fwdb_header *db,
946 const struct fwdb_country *country)
947{
948 unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2;
949 struct fwdb_collection *coll = (void *)((u8 *)db + ptr);
950 struct ieee80211_regdomain *regdom;
38cb87ee 951 unsigned int size_of_regd, i;
007f6c5e 952
230ebaa1 953 size_of_regd = sizeof(struct ieee80211_regdomain) +
007f6c5e
JB		 954 coll->n_rules * sizeof(struct ieee80211_reg_rule);
955
956 regdom = kzalloc(size_of_regd, GFP_KERNEL);
957 if (!regdom)
958 return -ENOMEM;
959
960 regdom->n_reg_rules = coll->n_rules;
961 regdom->alpha2[0] = country->alpha2[0];
962 regdom->alpha2[1] = country->alpha2[1];
963 regdom->dfs_region = coll->dfs_region;
964
965 for (i = 0; i < regdom->n_reg_rules; i++) {
966 __be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2));
967 unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2;
968 struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr);
969 struct ieee80211_reg_rule *rrule = &regdom->reg_rules[i];
970
971 rrule->freq_range.start_freq_khz = be32_to_cpu(rule->start);
972 rrule->freq_range.end_freq_khz = be32_to_cpu(rule->end);
973 rrule->freq_range.max_bandwidth_khz = be32_to_cpu(rule->max_bw);
974
975 rrule->power_rule.max_antenna_gain = 0;
976 rrule->power_rule.max_eirp = be16_to_cpu(rule->max_eirp);
977
978 rrule->flags = 0;
979 if (rule->flags & FWDB_FLAG_NO_OFDM)
980 rrule->flags |= NL80211_RRF_NO_OFDM;
981 if (rule->flags & FWDB_FLAG_NO_OUTDOOR)
982 rrule->flags |= NL80211_RRF_NO_OUTDOOR;
983 if (rule->flags & FWDB_FLAG_DFS)
984 rrule->flags |= NL80211_RRF_DFS;
985 if (rule->flags & FWDB_FLAG_NO_IR)
986 rrule->flags |= NL80211_RRF_NO_IR;
987 if (rule->flags & FWDB_FLAG_AUTO_BW)
988 rrule->flags |= NL80211_RRF_AUTO_BW;
989
990 rrule->dfs_cac_ms = 0;
991
992 /* handle optional data */
993 if (rule->len >= offsetofend(struct fwdb_rule, cac_timeout))
994 rrule->dfs_cac_ms =
995 1000 * be16_to_cpu(rule->cac_timeout);
014f5a25
SG		 996 if (rule->len >= offsetofend(struct fwdb_rule, wmm_ptr))
997 set_wmm_rule(db, country, rule, rrule);
007f6c5e
JB		 998 }
999
1000 return reg_schedule_apply(regdom);
1001}
1002
1003static int query_regdb(const char *alpha2)
1004{
1005 const struct fwdb_header *hdr = regdb;
1006 const struct fwdb_country *country;
1007
1ea4ff3e
JB		 1008 ASSERT_RTNL();
1009
007f6c5e
JB		 1010 if (IS_ERR(regdb))
1011 return PTR_ERR(regdb);
1012
1013 country = &hdr->country[0];
1014 while (country->coll_ptr) {
1015 if (alpha2_equal(alpha2, country->alpha2))
1016 return regdb_query_country(regdb, country);
1017 country++;
1018 }
1019
1020 return -ENODATA;
1021}
1022
1023static void regdb_fw_cb(const struct firmware *fw, void *context)
1024{
1ea4ff3e
JB		 1025 int set_error = 0;
1026 bool restore = true;
007f6c5e
JB		 1027 void *db;
1028
1029 if (!fw) {
1030 pr_info("failed to load regulatory.db\n");
1ea4ff3e
JB		 1031 set_error = -ENODATA;
1032 } else if (!valid_regdb(fw->data, fw->size)) {
90a53e44 1033 pr_info("loaded regulatory.db is malformed or signature is missing/invalid\n");
1ea4ff3e 1034 set_error = -EINVAL;
007f6c5e
JB		 1035 }
1036
1ea4ff3e 1037 rtnl_lock();
faae54ad
CT		 1038 if (regdb && !IS_ERR(regdb)) {
1039 /* negative case - a bug
1040 * positive case - can happen due to race in case of multiple cb's in
1041 * queue, due to usage of asynchronous callback
1042 *
1043 * Either case, just restore and free new db.
1044 */
1ea4ff3e
JB		 1045 } else if (set_error) {
1046 regdb = ERR_PTR(set_error);
1047 } else if (fw) {
1048 db = kmemdup(fw->data, fw->size, GFP_KERNEL);
1049 if (db) {
1050 regdb = db;
1051 restore = context && query_regdb(context);
1052 } else {
1053 restore = true;
1054 }
007f6c5e
JB		 1055 }
1056
1ea4ff3e 1057 if (restore)
e646a025 1058 restore_regulatory_settings(true, false);
007f6c5e 1059
007f6c5e 1060 rtnl_unlock();
1ea4ff3e 1061
007f6c5e 1062 kfree(context);
1ea4ff3e
JB		 1063
1064 release_firmware(fw);
007f6c5e
JB		 1065}
1066
1067static int query_regdb_file(const char *alpha2)
1068{
1ea4ff3e
JB		 1069 ASSERT_RTNL();
1070
007f6c5e
JB		 1071 if (regdb)
1072 return query_regdb(alpha2);
1073
1074 alpha2 = kmemdup(alpha2, 2, GFP_KERNEL);
1075 if (!alpha2)
1076 return -ENOMEM;
1077
1078 return request_firmware_nowait(THIS_MODULE, true, "regulatory.db",
1079 &reg_pdev->dev, GFP_KERNEL,
1080 (void *)alpha2, regdb_fw_cb);
1081}
1082
1ea4ff3e
JB		 1083int reg_reload_regdb(void)
1084{
1085 const struct firmware *fw;
1086 void *db;
1087 int err;
1088
1089 err = request_firmware(&fw, "regulatory.db", &reg_pdev->dev);
1090 if (err)
1091 return err;
1092
1093 if (!valid_regdb(fw->data, fw->size)) {
1094 err = -ENODATA;
1095 goto out;
1096 }
1097
1098 db = kmemdup(fw->data, fw->size, GFP_KERNEL);
1099 if (!db) {
1100 err = -ENOMEM;
1101 goto out;
1102 }
1103
1104 rtnl_lock();
1105 if (!IS_ERR_OR_NULL(regdb))
1106 kfree(regdb);
1107 regdb = db;
1108 rtnl_unlock();
1109
1110 out:
1111 release_firmware(fw);
1112 return err;
1113}
1114
cecbb069 1115static bool reg_query_database(struct regulatory_request *request)
fe6631ff 1116{
007f6c5e
JB		 1117 if (query_regdb_file(request->alpha2) == 0)
1118 return true;
1119
c7d319e5
JB		 1120 if (call_crda(request->alpha2) == 0)
1121 return true;
1122
1123 return false;
fe6631ff
LR		 1124}
1125
e438768f 1126bool reg_is_valid_request(const char *alpha2)
b2e1b302 1127{
c492db37 1128 struct regulatory_request *lr = get_last_request();
61405e97 1129
c492db37 1130 if (!lr || lr->processed)
f6037d09
JB		 1131 return false;
1132
c492db37 1133 return alpha2_equal(lr->alpha2, alpha2);
b2e1b302 1134}
8318d78a 1135
e3961af1
JD		 1136static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy)
1137{
1138 struct regulatory_request *lr = get_last_request();
1139
1140 /*
1141 * Follow the driver's regulatory domain, if present, unless a country
1142 * IE has been processed or a user wants to help complaince further
1143 */
1144 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
1145 lr->initiator != NL80211_REGDOM_SET_BY_USER &&
1146 wiphy->regd)
1147 return get_wiphy_regdom(wiphy);
1148
1149 return get_cfg80211_regdom();
1150}
1151
a6d4a534
AN		 1152static unsigned int
1153reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd,
1154 const struct ieee80211_reg_rule *rule)
97524820
JD		 1155{
1156 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
1157 const struct ieee80211_freq_range *freq_range_tmp;
1158 const struct ieee80211_reg_rule *tmp;
1159 u32 start_freq, end_freq, idx, no;
1160
1161 for (idx = 0; idx < rd->n_reg_rules; idx++)
1162 if (rule == &rd->reg_rules[idx])
1163 break;
1164
1165 if (idx == rd->n_reg_rules)
1166 return 0;
1167
1168 /* get start_freq */
1169 no = idx;
1170
1171 while (no) {
1172 tmp = &rd->reg_rules[--no];
1173 freq_range_tmp = &tmp->freq_range;
1174
1175 if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz)
1176 break;
1177
97524820
JD		 1178 freq_range = freq_range_tmp;
1179 }
1180
1181 start_freq = freq_range->start_freq_khz;
1182
1183 /* get end_freq */
1184 freq_range = &rule->freq_range;
1185 no = idx;
1186
1187 while (no < rd->n_reg_rules - 1) {
1188 tmp = &rd->reg_rules[++no];
1189 freq_range_tmp = &tmp->freq_range;
1190
1191 if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz)
1192 break;
1193
97524820
JD		 1194 freq_range = freq_range_tmp;
1195 }
1196
1197 end_freq = freq_range->end_freq_khz;
1198
1199 return end_freq - start_freq;
1200}
1201
a6d4a534
AN		 1202unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd,
1203 const struct ieee80211_reg_rule *rule)
1204{
1205 unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule);
1206
1207 if (rule->flags & NL80211_RRF_NO_160MHZ)
1208 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80));
1209 if (rule->flags & NL80211_RRF_NO_80MHZ)
1210 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40));
1211
1212 /*
1213 * HT40+/HT40- limits are handled per-channel. Only limit BW if both
1214 * are not allowed.
1215 */
1216 if (rule->flags & NL80211_RRF_NO_HT40MINUS &&
1217 rule->flags & NL80211_RRF_NO_HT40PLUS)
1218 bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20));
1219
1220 return bw;
1221}
1222
b2e1b302 1223/* Sanity check on a regulatory rule */
a3d2eaf0 1224static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule)
8318d78a 1225{
a3d2eaf0 1226 const struct ieee80211_freq_range *freq_range = &rule->freq_range;
b2e1b302
LR		 1227 u32 freq_diff;
1228
91e99004 1229 if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0)
b2e1b302
LR		 1230 return false;
1231
1232 if (freq_range->start_freq_khz > freq_range->end_freq_khz)
1233 return false;
1234
1235 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
1236
bd05f28e 1237 if (freq_range->end_freq_khz <= freq_range->start_freq_khz ||
1a919318 1238 freq_range->max_bandwidth_khz > freq_diff)
b2e1b302
LR		 1239 return false;
1240
1241 return true;
1242}
1243
a3d2eaf0 1244static bool is_valid_rd(const struct ieee80211_regdomain *rd)
b2e1b302 1245{
a3d2eaf0 1246 const struct ieee80211_reg_rule *reg_rule = NULL;
b2e1b302 1247 unsigned int i;
8318d78a 1248
b2e1b302
LR		 1249 if (!rd->n_reg_rules)
1250 return false;
8318d78a 1251
88dc1c3f
LR		 1252 if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES))
1253 return false;
1254
b2e1b302
LR		 1255 for (i = 0; i < rd->n_reg_rules; i++) {
1256 reg_rule = &rd->reg_rules[i];
1257 if (!is_valid_reg_rule(reg_rule))
1258 return false;
1259 }
1260
1261 return true;
8318d78a
JB		 1262}
1263
0c7dc45d
LR		 1264/**
1265 * freq_in_rule_band - tells us if a frequency is in a frequency band
1266 * @freq_range: frequency rule we want to query
1267 * @freq_khz: frequency we are inquiring about
1268 *
1269 * This lets us know if a specific frequency rule is or is not relevant to
1270 * a specific frequency's band. Bands are device specific and artificial
64629b9d
VK		 1271 * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"),
1272 * however it is safe for now to assume that a frequency rule should not be
1273 * part of a frequency's band if the start freq or end freq are off by more
93183bdb 1274 * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 20 GHz for the
64629b9d 1275 * 60 GHz band.
0c7dc45d
LR		 1276 * This resolution can be lowered and should be considered as we add
1277 * regulatory rule support for other "bands".
1278 **/
1279static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range,
1a919318 1280 u32 freq_khz)
0c7dc45d
LR		 1281{
1282#define ONE_GHZ_IN_KHZ 1000000
64629b9d
VK		 1283 /*
1284 * From 802.11ad: directional multi-gigabit (DMG):
1285 * Pertaining to operation in a frequency band containing a channel
1286 * with the Channel starting frequency above 45 GHz.
1287 */
1288 u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ?
93183bdb 1289 20 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ;
64629b9d 1290 if (abs(freq_khz - freq_range->start_freq_khz) <= limit)
0c7dc45d 1291 return true;
64629b9d 1292 if (abs(freq_khz - freq_range->end_freq_khz) <= limit)
0c7dc45d
LR		 1293 return true;
1294 return false;
1295#undef ONE_GHZ_IN_KHZ
1296}
1297
adbfb058
LR		 1298/*
1299 * Later on we can perhaps use the more restrictive DFS
1300 * region but we don't have information for that yet so
1301 * for now simply disallow conflicts.
1302 */
1303static enum nl80211_dfs_regions
1304reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1,
1305 const enum nl80211_dfs_regions dfs_region2)
1306{
1307 if (dfs_region1 != dfs_region2)
1308 return NL80211_DFS_UNSET;
1309 return dfs_region1;
1310}
1311
fb1fc7ad
LR		 1312/*
1313 * Helper for regdom_intersect(), this does the real
1314 * mathematical intersection fun
1315 */
97524820
JD		 1316static int reg_rules_intersect(const struct ieee80211_regdomain *rd1,
1317 const struct ieee80211_regdomain *rd2,
1318 const struct ieee80211_reg_rule *rule1,
1a919318
JB		 1319 const struct ieee80211_reg_rule *rule2,
1320 struct ieee80211_reg_rule *intersected_rule)
9c96477d
LR		 1321{
1322 const struct ieee80211_freq_range *freq_range1, *freq_range2;
1323 struct ieee80211_freq_range *freq_range;
1324 const struct ieee80211_power_rule *power_rule1, *power_rule2;
1325 struct ieee80211_power_rule *power_rule;
97524820 1326 u32 freq_diff, max_bandwidth1, max_bandwidth2;
9c96477d
LR		 1327
1328 freq_range1 = &rule1->freq_range;
1329 freq_range2 = &rule2->freq_range;
1330 freq_range = &intersected_rule->freq_range;
1331
1332 power_rule1 = &rule1->power_rule;
1333 power_rule2 = &rule2->power_rule;
1334 power_rule = &intersected_rule->power_rule;
1335
1336 freq_range->start_freq_khz = max(freq_range1->start_freq_khz,
1a919318 1337 freq_range2->start_freq_khz);
9c96477d 1338 freq_range->end_freq_khz = min(freq_range1->end_freq_khz,
1a919318 1339 freq_range2->end_freq_khz);
97524820
JD		 1340
1341 max_bandwidth1 = freq_range1->max_bandwidth_khz;
1342 max_bandwidth2 = freq_range2->max_bandwidth_khz;
1343
b0dfd2ea
JD		 1344 if (rule1->flags & NL80211_RRF_AUTO_BW)
1345 max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1);
1346 if (rule2->flags & NL80211_RRF_AUTO_BW)
1347 max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2);
97524820
JD		 1348
1349 freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2);
9c96477d 1350
b0dfd2ea
JD		 1351 intersected_rule->flags = rule1->flags | rule2->flags;
1352
1353 /*
1354 * In case NL80211_RRF_AUTO_BW requested for both rules
1355 * set AUTO_BW in intersected rule also. Next we will
1356 * calculate BW correctly in handle_channel function.
1357 * In other case remove AUTO_BW flag while we calculate
1358 * maximum bandwidth correctly and auto calculation is
1359 * not required.
1360 */
1361 if ((rule1->flags & NL80211_RRF_AUTO_BW) &&
1362 (rule2->flags & NL80211_RRF_AUTO_BW))
1363 intersected_rule->flags |= NL80211_RRF_AUTO_BW;
1364 else
1365 intersected_rule->flags &= ~NL80211_RRF_AUTO_BW;
1366
9c96477d
LR		 1367 freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz;
1368 if (freq_range->max_bandwidth_khz > freq_diff)
1369 freq_range->max_bandwidth_khz = freq_diff;
1370
1371 power_rule->max_eirp = min(power_rule1->max_eirp,
1372 power_rule2->max_eirp);
1373 power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain,
1374 power_rule2->max_antenna_gain);
1375
089027e5
JD		 1376 intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms,
1377 rule2->dfs_cac_ms);
1378
9c96477d
LR		 1379 if (!is_valid_reg_rule(intersected_rule))
1380 return -EINVAL;
1381
1382 return 0;
1383}
1384
a62a1aed
EP		 1385/* check whether old rule contains new rule */
1386static bool rule_contains(struct ieee80211_reg_rule *r1,
1387 struct ieee80211_reg_rule *r2)
1388{
1389 /* for simplicity, currently consider only same flags */
1390 if (r1->flags != r2->flags)
1391 return false;
1392
1393 /* verify r1 is more restrictive */
1394 if ((r1->power_rule.max_antenna_gain >
1395 r2->power_rule.max_antenna_gain) ||
1396 r1->power_rule.max_eirp > r2->power_rule.max_eirp)
1397 return false;
1398
1399 /* make sure r2's range is contained within r1 */
1400 if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz ||
1401 r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz)
1402 return false;
1403
1404 /* and finally verify that r1.max_bw >= r2.max_bw */
1405 if (r1->freq_range.max_bandwidth_khz <
1406 r2->freq_range.max_bandwidth_khz)
1407 return false;
1408
1409 return true;
1410}
1411
1412/* add or extend current rules. do nothing if rule is already contained */
1413static void add_rule(struct ieee80211_reg_rule *rule,
1414 struct ieee80211_reg_rule *reg_rules, u32 *n_rules)
1415{
1416 struct ieee80211_reg_rule *tmp_rule;
1417 int i;
1418
1419 for (i = 0; i < *n_rules; i++) {
1420 tmp_rule = &reg_rules[i];
1421 /* rule is already contained - do nothing */
1422 if (rule_contains(tmp_rule, rule))
1423 return;
1424
1425 /* extend rule if possible */
1426 if (rule_contains(rule, tmp_rule)) {
1427 memcpy(tmp_rule, rule, sizeof(*rule));
1428 return;
1429 }
1430 }
1431
1432 memcpy(&reg_rules[*n_rules], rule, sizeof(*rule));
1433 (*n_rules)++;
1434}
1435
9c96477d
LR		 1436/**
1437 * regdom_intersect - do the intersection between two regulatory domains
1438 * @rd1: first regulatory domain
1439 * @rd2: second regulatory domain
1440 *
1441 * Use this function to get the intersection between two regulatory domains.
1442 * Once completed we will mark the alpha2 for the rd as intersected, "98",
1443 * as no one single alpha2 can represent this regulatory domain.
1444 *
1445 * Returns a pointer to the regulatory domain structure which will hold the
1446 * resulting intersection of rules between rd1 and rd2. We will
1447 * kzalloc() this structure for you.
1448 */
1a919318
JB		 1449static struct ieee80211_regdomain *
1450regdom_intersect(const struct ieee80211_regdomain *rd1,
1451 const struct ieee80211_regdomain *rd2)
9c96477d
LR		 1452{
1453 int r, size_of_regd;
1454 unsigned int x, y;
a62a1aed 1455 unsigned int num_rules = 0;
9c96477d 1456 const struct ieee80211_reg_rule *rule1, *rule2;
a62a1aed 1457 struct ieee80211_reg_rule intersected_rule;
9c96477d 1458 struct ieee80211_regdomain *rd;
9c96477d
LR		 1459
1460 if (!rd1 || !rd2)
1461 return NULL;
1462
fb1fc7ad
LR		 1463 /*
1464 * First we get a count of the rules we'll need, then we actually
9c96477d
LR		 1465 * build them. This is to so we can malloc() and free() a
1466 * regdomain once. The reason we use reg_rules_intersect() here
1467 * is it will return -EINVAL if the rule computed makes no sense.
fb1fc7ad
LR		 1468 * All rules that do check out OK are valid.
1469 */
9c96477d
LR		 1470
1471 for (x = 0; x < rd1->n_reg_rules; x++) {
1472 rule1 = &rd1->reg_rules[x];
1473 for (y = 0; y < rd2->n_reg_rules; y++) {
1474 rule2 = &rd2->reg_rules[y];
97524820 1475 if (!reg_rules_intersect(rd1, rd2, rule1, rule2,
a62a1aed 1476 &intersected_rule))
9c96477d 1477 num_rules++;
9c96477d
LR		 1478 }
1479 }
1480
1481 if (!num_rules)
1482 return NULL;
1483
1484 size_of_regd = sizeof(struct ieee80211_regdomain) +
82f20856 1485 num_rules * sizeof(struct ieee80211_reg_rule);
9c96477d
LR		 1486
1487 rd = kzalloc(size_of_regd, GFP_KERNEL);
1488 if (!rd)
1489 return NULL;
1490
a62a1aed 1491 for (x = 0; x < rd1->n_reg_rules; x++) {
9c96477d 1492 rule1 = &rd1->reg_rules[x];
a62a1aed 1493 for (y = 0; y < rd2->n_reg_rules; y++) {
9c96477d 1494 rule2 = &rd2->reg_rules[y];
97524820 1495 r = reg_rules_intersect(rd1, rd2, rule1, rule2,
a62a1aed 1496 &intersected_rule);
fb1fc7ad
LR		 1497 /*
1498 * No need to memset here the intersected rule here as
1499 * we're not using the stack anymore
1500 */
9c96477d
LR		 1501 if (r)
1502 continue;
9c96477d 1503
a62a1aed
EP		 1504 add_rule(&intersected_rule, rd->reg_rules,
1505 &rd->n_reg_rules);
1506 }
9c96477d
LR		 1507 }
1508
9c96477d
LR		 1509 rd->alpha2[0] = '9';
1510 rd->alpha2[1] = '8';
adbfb058
LR		 1511 rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region,
1512 rd2->dfs_region);
9c96477d
LR		 1513
1514 return rd;
1515}
1516
fb1fc7ad
LR		 1517/*
1518 * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may
1519 * want to just have the channel structure use these
1520 */
b2e1b302
LR		 1521static u32 map_regdom_flags(u32 rd_flags)
1522{
1523 u32 channel_flags = 0;
8fe02e16
LR		 1524 if (rd_flags & NL80211_RRF_NO_IR_ALL)
1525 channel_flags |= IEEE80211_CHAN_NO_IR;
b2e1b302
LR		 1526 if (rd_flags & NL80211_RRF_DFS)
1527 channel_flags |= IEEE80211_CHAN_RADAR;
03f6b084
SF		 1528 if (rd_flags & NL80211_RRF_NO_OFDM)
1529 channel_flags |= IEEE80211_CHAN_NO_OFDM;
570dbde1
DS		 1530 if (rd_flags & NL80211_RRF_NO_OUTDOOR)
1531 channel_flags |= IEEE80211_CHAN_INDOOR_ONLY;
06f207fc
AN		 1532 if (rd_flags & NL80211_RRF_IR_CONCURRENT)
1533 channel_flags |= IEEE80211_CHAN_IR_CONCURRENT;
a6d4a534
AN		 1534 if (rd_flags & NL80211_RRF_NO_HT40MINUS)
1535 channel_flags |= IEEE80211_CHAN_NO_HT40MINUS;
1536 if (rd_flags & NL80211_RRF_NO_HT40PLUS)
1537 channel_flags |= IEEE80211_CHAN_NO_HT40PLUS;
1538 if (rd_flags & NL80211_RRF_NO_80MHZ)
1539 channel_flags |= IEEE80211_CHAN_NO_80MHZ;
1540 if (rd_flags & NL80211_RRF_NO_160MHZ)
1541 channel_flags |= IEEE80211_CHAN_NO_160MHZ;
b2e1b302
LR		 1542 return channel_flags;
1543}
1544
361c9c8b 1545static const struct ieee80211_reg_rule *
49172874 1546freq_reg_info_regd(u32 center_freq,
4edd5698 1547 const struct ieee80211_regdomain *regd, u32 bw)
8318d78a
JB		 1548{
1549 int i;
0c7dc45d 1550 bool band_rule_found = false;
038659e7
LR		 1551 bool bw_fits = false;
1552
3e0c3ff3 1553 if (!regd)
361c9c8b 1554 return ERR_PTR(-EINVAL);
b2e1b302 1555
3e0c3ff3 1556 for (i = 0; i < regd->n_reg_rules; i++) {
b2e1b302
LR		 1557 const struct ieee80211_reg_rule *rr;
1558 const struct ieee80211_freq_range *fr = NULL;
b2e1b302 1559
3e0c3ff3 1560 rr = &regd->reg_rules[i];
b2e1b302 1561 fr = &rr->freq_range;
0c7dc45d 1562
fb1fc7ad
LR		 1563 /*
1564 * We only need to know if one frequency rule was
0c7dc45d 1565 * was in center_freq's band, that's enough, so lets
fb1fc7ad
LR		 1566 * not overwrite it once found
1567 */
0c7dc45d
LR		 1568 if (!band_rule_found)
1569 band_rule_found = freq_in_rule_band(fr, center_freq);
1570
4787cfa0 1571 bw_fits = cfg80211_does_bw_fit_range(fr, center_freq, bw);
0c7dc45d 1572
361c9c8b
JB		 1573 if (band_rule_found && bw_fits)
1574 return rr;
8318d78a
JB		 1575 }
1576
0c7dc45d 1577 if (!band_rule_found)
361c9c8b 1578 return ERR_PTR(-ERANGE);
0c7dc45d 1579
361c9c8b 1580 return ERR_PTR(-EINVAL);
b2e1b302
LR		 1581}
1582
8de1c63b
JB		 1583static const struct ieee80211_reg_rule *
1584__freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw)
1fa25e41 1585{
4edd5698
MM		 1586 const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy);
1587 const struct ieee80211_reg_rule *reg_rule = NULL;
1588 u32 bw;
1a919318 1589
4edd5698 1590 for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) {
49172874 1591 reg_rule = freq_reg_info_regd(center_freq, regd, bw);
4edd5698
MM		 1592 if (!IS_ERR(reg_rule))
1593 return reg_rule;
1594 }
5d885b99 1595
4edd5698
MM		 1596 return reg_rule;
1597}
1598
1599const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy,
1600 u32 center_freq)
1601{
1602 return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(20));
1fa25e41 1603}
4f366c5d 1604EXPORT_SYMBOL(freq_reg_info);
b2e1b302 1605
034c6d6e 1606const char *reg_initiator_name(enum nl80211_reg_initiator initiator)
926a0a09
LR		 1607{
1608 switch (initiator) {
1609 case NL80211_REGDOM_SET_BY_CORE:
034c6d6e 1610 return "core";
926a0a09 1611 case NL80211_REGDOM_SET_BY_USER:
034c6d6e 1612 return "user";
926a0a09 1613 case NL80211_REGDOM_SET_BY_DRIVER:
034c6d6e 1614 return "driver";
926a0a09 1615 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
8db0c433 1616 return "country element";
926a0a09
LR		 1617 default:
1618 WARN_ON(1);
034c6d6e 1619 return "bug";
926a0a09
LR		 1620 }
1621}
034c6d6e 1622EXPORT_SYMBOL(reg_initiator_name);
e702d3cf 1623
1aeb135f
MS		 1624static uint32_t reg_rule_to_chan_bw_flags(const struct ieee80211_regdomain *regd,
1625 const struct ieee80211_reg_rule *reg_rule,
1626 const struct ieee80211_channel *chan)
1627{
1628 const struct ieee80211_freq_range *freq_range = NULL;
1629 u32 max_bandwidth_khz, bw_flags = 0;
1630
1631 freq_range = &reg_rule->freq_range;
1632
1633 max_bandwidth_khz = freq_range->max_bandwidth_khz;
1634 /* Check if auto calculation requested */
1635 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
1636 max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule);
1637
1638 /* If we get a reg_rule we can assume that at least 5Mhz fit */
4787cfa0
RM		 1639 if (!cfg80211_does_bw_fit_range(freq_range,
1640 MHZ_TO_KHZ(chan->center_freq),
1641 MHZ_TO_KHZ(10)))
1aeb135f 1642 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
4787cfa0
RM		 1643 if (!cfg80211_does_bw_fit_range(freq_range,
1644 MHZ_TO_KHZ(chan->center_freq),
1645 MHZ_TO_KHZ(20)))
1aeb135f
MS		 1646 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1647
1648 if (max_bandwidth_khz < MHZ_TO_KHZ(10))
1649 bw_flags |= IEEE80211_CHAN_NO_10MHZ;
1650 if (max_bandwidth_khz < MHZ_TO_KHZ(20))
1651 bw_flags |= IEEE80211_CHAN_NO_20MHZ;
1652 if (max_bandwidth_khz < MHZ_TO_KHZ(40))
1653 bw_flags |= IEEE80211_CHAN_NO_HT40;
1654 if (max_bandwidth_khz < MHZ_TO_KHZ(80))
1655 bw_flags |= IEEE80211_CHAN_NO_80MHZ;
1656 if (max_bandwidth_khz < MHZ_TO_KHZ(160))
1657 bw_flags |= IEEE80211_CHAN_NO_160MHZ;
1658 return bw_flags;
1659}
1660
e33e2241
JB		 1661/*
1662 * Note that right now we assume the desired channel bandwidth
1663 * is always 20 MHz for each individual channel (HT40 uses 20 MHz
1664 * per channel, the primary and the extension channel).
038659e7 1665 */
7ca43d03
LR		 1666static void handle_channel(struct wiphy *wiphy,
1667 enum nl80211_reg_initiator initiator,
fdc9d7b2 1668 struct ieee80211_channel *chan)
b2e1b302 1669{
038659e7 1670 u32 flags, bw_flags = 0;
b2e1b302
LR		 1671 const struct ieee80211_reg_rule *reg_rule = NULL;
1672 const struct ieee80211_power_rule *power_rule = NULL;
fe33eb39 1673 struct wiphy *request_wiphy = NULL;
c492db37 1674 struct regulatory_request *lr = get_last_request();
97524820 1675 const struct ieee80211_regdomain *regd;
a92a3ce7 1676
c492db37 1677 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
a92a3ce7
LR		 1678
1679 flags = chan->orig_flags;
b2e1b302 1680
361c9c8b
JB		 1681 reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq));
1682 if (IS_ERR(reg_rule)) {
ca4ffe8f
LR		 1683 /*
1684 * We will disable all channels that do not match our
25985edc 1685 * received regulatory rule unless the hint is coming
ca4ffe8f
LR		 1686 * from a Country IE and the Country IE had no information
1687 * about a band. The IEEE 802.11 spec allows for an AP
1688 * to send only a subset of the regulatory rules allowed,
1689 * so an AP in the US that only supports 2.4 GHz may only send
1690 * a country IE with information for the 2.4 GHz band
1691 * while 5 GHz is still supported.
1692 */
1693 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
361c9c8b 1694 PTR_ERR(reg_rule) == -ERANGE)
ca4ffe8f
LR		 1695 return;
1696
cc493e4f
LR		 1697 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
1698 request_wiphy && request_wiphy == wiphy &&
a2f73b6c 1699 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
c799ba6e
JB		 1700 pr_debug("Disabling freq %d MHz for good\n",
1701 chan->center_freq);
cc493e4f
LR		 1702 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
1703 chan->flags = chan->orig_flags;
1704 } else {
c799ba6e
JB		 1705 pr_debug("Disabling freq %d MHz\n",
1706 chan->center_freq);
cc493e4f
LR		 1707 chan->flags |= IEEE80211_CHAN_DISABLED;
1708 }
8318d78a 1709 return;
ca4ffe8f 1710 }
8318d78a 1711
b0dfd2ea 1712 regd = reg_get_regdomain(wiphy);
e702d3cf 1713
b2e1b302 1714 power_rule = &reg_rule->power_rule;
1aeb135f 1715 bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
b2e1b302 1716
c492db37 1717 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
806a9e39 1718 request_wiphy && request_wiphy == wiphy &&
a2f73b6c 1719 request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
fb1fc7ad 1720 /*
25985edc 1721 * This guarantees the driver's requested regulatory domain
f976376d 1722 * will always be used as a base for further regulatory
fb1fc7ad
LR		 1723 * settings
1724 */
f976376d 1725 chan->flags = chan->orig_flags =
038659e7 1726 map_regdom_flags(reg_rule->flags) | bw_flags;
f976376d
LR		 1727 chan->max_antenna_gain = chan->orig_mag =
1728 (int) MBI_TO_DBI(power_rule->max_antenna_gain);
279f0f55 1729 chan->max_reg_power = chan->max_power = chan->orig_mpwr =
f976376d 1730 (int) MBM_TO_DBM(power_rule->max_eirp);
4f267c11
JD		 1731
1732 if (chan->flags & IEEE80211_CHAN_RADAR) {
1733 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1734 if (reg_rule->dfs_cac_ms)
1735 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1736 }
1737
f976376d
LR		 1738 return;
1739 }
1740
04f39047
SW		 1741 chan->dfs_state = NL80211_DFS_USABLE;
1742 chan->dfs_state_entered = jiffies;
1743
aa3d7eef 1744 chan->beacon_found = false;
038659e7 1745 chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags);
1a919318
JB		 1746 chan->max_antenna_gain =
1747 min_t(int, chan->orig_mag,
1748 MBI_TO_DBI(power_rule->max_antenna_gain));
eccc068e 1749 chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp);
089027e5
JD		 1750
1751 if (chan->flags & IEEE80211_CHAN_RADAR) {
1752 if (reg_rule->dfs_cac_ms)
1753 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
1754 else
1755 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
1756 }
1757
5e31fc08
SG		 1758 if (chan->orig_mpwr) {
1759 /*
a09a85a0
LR		 1760 * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER
1761 * will always follow the passed country IE power settings.
5e31fc08
SG		 1762 */
1763 if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
a09a85a0 1764 wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER)
5e31fc08
SG		 1765 chan->max_power = chan->max_reg_power;
1766 else
1767 chan->max_power = min(chan->orig_mpwr,
1768 chan->max_reg_power);
1769 } else
1770 chan->max_power = chan->max_reg_power;
8318d78a
JB		 1771}
1772
7ca43d03 1773static void handle_band(struct wiphy *wiphy,
fdc9d7b2
JB		 1774 enum nl80211_reg_initiator initiator,
1775 struct ieee80211_supported_band *sband)
8318d78a 1776{
a92a3ce7 1777 unsigned int i;
a92a3ce7 1778
fdc9d7b2
JB		 1779 if (!sband)
1780 return;
8318d78a
JB		 1781
1782 for (i = 0; i < sband->n_channels; i++)
fdc9d7b2 1783 handle_channel(wiphy, initiator, &sband->channels[i]);
8318d78a
JB		 1784}
1785
57b5ce07
LR		 1786static bool reg_request_cell_base(struct regulatory_request *request)
1787{
1788 if (request->initiator != NL80211_REGDOM_SET_BY_USER)
1789 return false;
1a919318 1790 return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE;
57b5ce07
LR		 1791}
1792
1793bool reg_last_request_cell_base(void)
1794{
38fd2143 1795 return reg_request_cell_base(get_last_request());
57b5ce07
LR		 1796}
1797
94fc661f 1798#ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS
57b5ce07 1799/* Core specific check */
2f92212b
JB		 1800static enum reg_request_treatment
1801reg_ignore_cell_hint(struct regulatory_request *pending_request)
57b5ce07 1802{
c492db37
JB		 1803 struct regulatory_request *lr = get_last_request();
1804
57b5ce07 1805 if (!reg_num_devs_support_basehint)
2f92212b 1806 return REG_REQ_IGNORE;
57b5ce07 1807
c492db37 1808 if (reg_request_cell_base(lr) &&
1a919318 1809 !regdom_changes(pending_request->alpha2))
2f92212b 1810 return REG_REQ_ALREADY_SET;
1a919318 1811
2f92212b 1812 return REG_REQ_OK;
57b5ce07
LR		 1813}
1814
1815/* Device specific check */
1816static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
1817{
1a919318 1818 return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS);
57b5ce07
LR		 1819}
1820#else
a515de66
JB		 1821static enum reg_request_treatment
1822reg_ignore_cell_hint(struct regulatory_request *pending_request)
57b5ce07 1823{
2f92212b 1824 return REG_REQ_IGNORE;
57b5ce07 1825}
1a919318
JB		 1826
1827static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy)
57b5ce07
LR		 1828{
1829 return true;
1830}
1831#endif
1832
fa1fb9cb
LR		 1833static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy)
1834{
a2f73b6c
LR		 1835 if (wiphy->regulatory_flags & REGULATORY_STRICT_REG &&
1836 !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG))
fa1fb9cb
LR		 1837 return true;
1838 return false;
1839}
57b5ce07 1840
7db90f4a
LR		 1841static bool ignore_reg_update(struct wiphy *wiphy,
1842 enum nl80211_reg_initiator initiator)
14b9815a 1843{
c492db37
JB		 1844 struct regulatory_request *lr = get_last_request();
1845
b0d7aa59
JD		 1846 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
1847 return true;
1848
c492db37 1849 if (!lr) {
c799ba6e
JB		 1850 pr_debug("Ignoring regulatory request set by %s since last_request is not set\n",
1851 reg_initiator_name(initiator));
14b9815a 1852 return true;
926a0a09
LR		 1853 }
1854
7db90f4a 1855 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
a2f73b6c 1856 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
c799ba6e
JB		 1857 pr_debug("Ignoring regulatory request set by %s since the driver uses its own custom regulatory domain\n",
1858 reg_initiator_name(initiator));
14b9815a 1859 return true;
926a0a09
LR		 1860 }
1861
fb1fc7ad
LR		 1862 /*
1863 * wiphy->regd will be set once the device has its own
1864 * desired regulatory domain set
1865 */
fa1fb9cb 1866 if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd &&
749b527b 1867 initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
c492db37 1868 !is_world_regdom(lr->alpha2)) {
c799ba6e
JB		 1869 pr_debug("Ignoring regulatory request set by %s since the driver requires its own regulatory domain to be set first\n",
1870 reg_initiator_name(initiator));
14b9815a 1871 return true;
926a0a09
LR		 1872 }
1873
c492db37 1874 if (reg_request_cell_base(lr))
57b5ce07
LR		 1875 return reg_dev_ignore_cell_hint(wiphy);
1876
14b9815a
LR		 1877 return false;
1878}
1879
3195e489
LR		 1880static bool reg_is_world_roaming(struct wiphy *wiphy)
1881{
1882 const struct ieee80211_regdomain *cr = get_cfg80211_regdom();
1883 const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy);
1884 struct regulatory_request *lr = get_last_request();
1885
1886 if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2)))
1887 return true;
1888
1889 if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE &&
a2f73b6c 1890 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)
3195e489
LR		 1891 return true;
1892
1893 return false;
1894}
1895
1a919318 1896static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx,
e38f8a7a
LR		 1897 struct reg_beacon *reg_beacon)
1898{
e38f8a7a
LR		 1899 struct ieee80211_supported_band *sband;
1900 struct ieee80211_channel *chan;
6bad8766
LR		 1901 bool channel_changed = false;
1902 struct ieee80211_channel chan_before;
e38f8a7a 1903
e38f8a7a
LR		 1904 sband = wiphy->bands[reg_beacon->chan.band];
1905 chan = &sband->channels[chan_idx];
1906
1907 if (likely(chan->center_freq != reg_beacon->chan.center_freq))
1908 return;
1909
6bad8766
LR		 1910 if (chan->beacon_found)
1911 return;
1912
1913 chan->beacon_found = true;
1914
0f500a5f
LR		 1915 if (!reg_is_world_roaming(wiphy))
1916 return;
1917
a2f73b6c 1918 if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS)
37184244
LR		 1919 return;
1920
a48a52b7 1921 chan_before = *chan;
6bad8766 1922
8fe02e16
LR		 1923 if (chan->flags & IEEE80211_CHAN_NO_IR) {
1924 chan->flags &= ~IEEE80211_CHAN_NO_IR;
6bad8766 1925 channel_changed = true;
e38f8a7a
LR		 1926 }
1927
6bad8766
LR		 1928 if (channel_changed)
1929 nl80211_send_beacon_hint_event(wiphy, &chan_before, chan);
e38f8a7a
LR		 1930}
1931
1932/*
1933 * Called when a scan on a wiphy finds a beacon on
1934 * new channel
1935 */
1936static void wiphy_update_new_beacon(struct wiphy *wiphy,
1937 struct reg_beacon *reg_beacon)
1938{
1939 unsigned int i;
1940 struct ieee80211_supported_band *sband;
1941
e38f8a7a
LR		 1942 if (!wiphy->bands[reg_beacon->chan.band])
1943 return;
1944
1945 sband = wiphy->bands[reg_beacon->chan.band];
1946
1947 for (i = 0; i < sband->n_channels; i++)
1948 handle_reg_beacon(wiphy, i, reg_beacon);
1949}
1950
1951/*
1952 * Called upon reg changes or a new wiphy is added
1953 */
1954static void wiphy_update_beacon_reg(struct wiphy *wiphy)
1955{
1956 unsigned int i;
1957 struct ieee80211_supported_band *sband;
1958 struct reg_beacon *reg_beacon;
1959
e38f8a7a
LR		 1960 list_for_each_entry(reg_beacon, &reg_beacon_list, list) {
1961 if (!wiphy->bands[reg_beacon->chan.band])
1962 continue;
1963 sband = wiphy->bands[reg_beacon->chan.band];
1964 for (i = 0; i < sband->n_channels; i++)
1965 handle_reg_beacon(wiphy, i, reg_beacon);
1966 }
1967}
1968
e38f8a7a
LR		 1969/* Reap the advantages of previously found beacons */
1970static void reg_process_beacons(struct wiphy *wiphy)
1971{
b1ed8ddd
LR		 1972 /*
1973 * Means we are just firing up cfg80211, so no beacons would
1974 * have been processed yet.
1975 */
1976 if (!last_request)
1977 return;
e38f8a7a
LR		 1978 wiphy_update_beacon_reg(wiphy);
1979}
1980
1a919318 1981static bool is_ht40_allowed(struct ieee80211_channel *chan)
038659e7
LR		 1982{
1983 if (!chan)
1a919318 1984 return false;
038659e7 1985 if (chan->flags & IEEE80211_CHAN_DISABLED)
1a919318 1986 return false;
038659e7 1987 /* This would happen when regulatory rules disallow HT40 completely */
55b183ad
FF		 1988 if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40)
1989 return false;
1990 return true;
038659e7
LR		 1991}
1992
1993static void reg_process_ht_flags_channel(struct wiphy *wiphy,
fdc9d7b2 1994 struct ieee80211_channel *channel)
038659e7 1995{
fdc9d7b2 1996 struct ieee80211_supported_band *sband = wiphy->bands[channel->band];
038659e7 1997 struct ieee80211_channel *channel_before = NULL, *channel_after = NULL;
4e0854a7 1998 const struct ieee80211_regdomain *regd;
038659e7 1999 unsigned int i;
4e0854a7 2000 u32 flags;
038659e7 2001
1a919318 2002 if (!is_ht40_allowed(channel)) {
038659e7
LR		 2003 channel->flags |= IEEE80211_CHAN_NO_HT40;
2004 return;
2005 }
2006
2007 /*
2008 * We need to ensure the extension channels exist to
2009 * be able to use HT40- or HT40+, this finds them (or not)
2010 */
2011 for (i = 0; i < sband->n_channels; i++) {
2012 struct ieee80211_channel *c = &sband->channels[i];
1a919318 2013
038659e7
LR		 2014 if (c->center_freq == (channel->center_freq - 20))
2015 channel_before = c;
2016 if (c->center_freq == (channel->center_freq + 20))
2017 channel_after = c;
2018 }
2019
4e0854a7
EG		 2020 flags = 0;
2021 regd = get_wiphy_regdom(wiphy);
2022 if (regd) {
2023 const struct ieee80211_reg_rule *reg_rule =
2024 freq_reg_info_regd(MHZ_TO_KHZ(channel->center_freq),
2025 regd, MHZ_TO_KHZ(20));
2026
2027 if (!IS_ERR(reg_rule))
2028 flags = reg_rule->flags;
2029 }
2030
038659e7
LR		 2031 /*
2032 * Please note that this assumes target bandwidth is 20 MHz,
2033 * if that ever changes we also need to change the below logic
2034 * to include that as well.
2035 */
4e0854a7
EG		 2036 if (!is_ht40_allowed(channel_before) ||
2037 flags & NL80211_RRF_NO_HT40MINUS)
689da1b3 2038 channel->flags |= IEEE80211_CHAN_NO_HT40MINUS;
038659e7 2039 else
689da1b3 2040 channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS;
038659e7 2041
4e0854a7
EG		 2042 if (!is_ht40_allowed(channel_after) ||
2043 flags & NL80211_RRF_NO_HT40PLUS)
689da1b3 2044 channel->flags |= IEEE80211_CHAN_NO_HT40PLUS;
038659e7 2045 else
689da1b3 2046 channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS;
038659e7
LR		 2047}
2048
2049static void reg_process_ht_flags_band(struct wiphy *wiphy,
fdc9d7b2 2050 struct ieee80211_supported_band *sband)
038659e7
LR		 2051{
2052 unsigned int i;
038659e7 2053
fdc9d7b2
JB		 2054 if (!sband)
2055 return;
038659e7
LR		 2056
2057 for (i = 0; i < sband->n_channels; i++)
fdc9d7b2 2058 reg_process_ht_flags_channel(wiphy, &sband->channels[i]);
038659e7
LR		 2059}
2060
2061static void reg_process_ht_flags(struct wiphy *wiphy)
2062{
57fbcce3 2063 enum nl80211_band band;
038659e7
LR		 2064
2065 if (!wiphy)
2066 return;
2067
57fbcce3 2068 for (band = 0; band < NUM_NL80211_BANDS; band++)
fdc9d7b2 2069 reg_process_ht_flags_band(wiphy, wiphy->bands[band]);
038659e7
LR		 2070}
2071
0e3802db
LR		 2072static void reg_call_notifier(struct wiphy *wiphy,
2073 struct regulatory_request *request)
2074{
2075 if (wiphy->reg_notifier)
2076 wiphy->reg_notifier(wiphy, request);
2077}
2078
ad932f04
AN		 2079static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev)
2080{
ad932f04
AN		 2081 struct cfg80211_chan_def chandef;
2082 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
20658702 2083 enum nl80211_iftype iftype;
ad932f04
AN		 2084
2085 wdev_lock(wdev);
20658702 2086 iftype = wdev->iftype;
ad932f04 2087
20658702 2088 /* make sure the interface is active */
ad932f04 2089 if (!wdev->netdev || !netif_running(wdev->netdev))
20658702 2090 goto wdev_inactive_unlock;
ad932f04 2091
20658702 2092 switch (iftype) {
ad932f04
AN		 2093 case NL80211_IFTYPE_AP:
2094 case NL80211_IFTYPE_P2P_GO:
2095 if (!wdev->beacon_interval)
20658702
AN		 2096 goto wdev_inactive_unlock;
2097 chandef = wdev->chandef;
185076d6
AN		 2098 break;
2099 case NL80211_IFTYPE_ADHOC:
2100 if (!wdev->ssid_len)
20658702
AN		 2101 goto wdev_inactive_unlock;
2102 chandef = wdev->chandef;
ad932f04
AN		 2103 break;
2104 case NL80211_IFTYPE_STATION:
2105 case NL80211_IFTYPE_P2P_CLIENT:
ad932f04
AN		 2106 if (!wdev->current_bss ||
2107 !wdev->current_bss->pub.channel)
20658702 2108 goto wdev_inactive_unlock;
ad932f04 2109
20658702
AN		 2110 if (!rdev->ops->get_channel ||
2111 rdev_get_channel(rdev, wdev, &chandef))
2112 cfg80211_chandef_create(&chandef,
2113 wdev->current_bss->pub.channel,
2114 NL80211_CHAN_NO_HT);
ad932f04
AN		 2115 break;
2116 case NL80211_IFTYPE_MONITOR:
2117 case NL80211_IFTYPE_AP_VLAN:
2118 case NL80211_IFTYPE_P2P_DEVICE:
2119 /* no enforcement required */
2120 break;
2121 default:
2122 /* others not implemented for now */
2123 WARN_ON(1);
2124 break;
2125 }
2126
ad932f04 2127 wdev_unlock(wdev);
20658702
AN		 2128
2129 switch (iftype) {
2130 case NL80211_IFTYPE_AP:
2131 case NL80211_IFTYPE_P2P_GO:
2132 case NL80211_IFTYPE_ADHOC:
923b352f 2133 return cfg80211_reg_can_beacon_relax(wiphy, &chandef, iftype);
20658702
AN		 2134 case NL80211_IFTYPE_STATION:
2135 case NL80211_IFTYPE_P2P_CLIENT:
2136 return cfg80211_chandef_usable(wiphy, &chandef,
2137 IEEE80211_CHAN_DISABLED);
2138 default:
2139 break;
2140 }
2141
2142 return true;
2143
2144wdev_inactive_unlock:
2145 wdev_unlock(wdev);
2146 return true;
ad932f04
AN		 2147}
2148
2149static void reg_leave_invalid_chans(struct wiphy *wiphy)
2150{
2151 struct wireless_dev *wdev;
2152 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
2153
2154 ASSERT_RTNL();
2155
53873f13 2156 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
ad932f04
AN		 2157 if (!reg_wdev_chan_valid(wiphy, wdev))
2158 cfg80211_leave(rdev, wdev);
2159}
2160
2161static void reg_check_chans_work(struct work_struct *work)
2162{
2163 struct cfg80211_registered_device *rdev;
2164
c799ba6e 2165 pr_debug("Verifying active interfaces after reg change\n");
ad932f04
AN		 2166 rtnl_lock();
2167
2168 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
2169 if (!(rdev->wiphy.regulatory_flags &
2170 REGULATORY_IGNORE_STALE_KICKOFF))
2171 reg_leave_invalid_chans(&rdev->wiphy);
2172
2173 rtnl_unlock();
2174}
2175
2176static void reg_check_channels(void)
2177{
2178 /*
2179 * Give usermode a chance to do something nicer (move to another
2180 * channel, orderly disconnection), before forcing a disconnection.
2181 */
2182 mod_delayed_work(system_power_efficient_wq,
2183 &reg_check_chans,
2184 msecs_to_jiffies(REG_ENFORCE_GRACE_MS));
2185}
2186
eac03e38
SN		 2187static void wiphy_update_regulatory(struct wiphy *wiphy,
2188 enum nl80211_reg_initiator initiator)
b2e1b302 2189{
57fbcce3 2190 enum nl80211_band band;
c492db37 2191 struct regulatory_request *lr = get_last_request();
eac03e38 2192
0e3802db
LR		 2193 if (ignore_reg_update(wiphy, initiator)) {
2194 /*
2195 * Regulatory updates set by CORE are ignored for custom
2196 * regulatory cards. Let us notify the changes to the driver,
2197 * as some drivers used this to restore its orig_* reg domain.
2198 */
2199 if (initiator == NL80211_REGDOM_SET_BY_CORE &&
e31f6456
AS		 2200 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG &&
2201 !(wiphy->regulatory_flags &
2202 REGULATORY_WIPHY_SELF_MANAGED))
0e3802db 2203 reg_call_notifier(wiphy, lr);
a203c2aa 2204 return;
0e3802db 2205 }
a203c2aa 2206
c492db37 2207 lr->dfs_region = get_cfg80211_regdom()->dfs_region;
b68e6b3b 2208
57fbcce3 2209 for (band = 0; band < NUM_NL80211_BANDS; band++)
fdc9d7b2 2210 handle_band(wiphy, initiator, wiphy->bands[band]);
a203c2aa 2211
e38f8a7a 2212 reg_process_beacons(wiphy);
038659e7 2213 reg_process_ht_flags(wiphy);
0e3802db 2214 reg_call_notifier(wiphy, lr);
b2e1b302
LR		 2215}
2216
d7549cbb
SN		 2217static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator)
2218{
2219 struct cfg80211_registered_device *rdev;
4a38994f 2220 struct wiphy *wiphy;
d7549cbb 2221
5fe231e8 2222 ASSERT_RTNL();
458f4f9e 2223
4a38994f
RM		 2224 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2225 wiphy = &rdev->wiphy;
2226 wiphy_update_regulatory(wiphy, initiator);
4a38994f 2227 }
ad932f04
AN		 2228
2229 reg_check_channels();
d7549cbb
SN		 2230}
2231
1fa25e41 2232static void handle_channel_custom(struct wiphy *wiphy,
fdc9d7b2 2233 struct ieee80211_channel *chan,
1fa25e41
LR		 2234 const struct ieee80211_regdomain *regd)
2235{
038659e7 2236 u32 bw_flags = 0;
1fa25e41
LR		 2237 const struct ieee80211_reg_rule *reg_rule = NULL;
2238 const struct ieee80211_power_rule *power_rule = NULL;
4edd5698 2239 u32 bw;
ac46d48e 2240
4edd5698 2241 for (bw = MHZ_TO_KHZ(20); bw >= MHZ_TO_KHZ(5); bw = bw / 2) {
49172874 2242 reg_rule = freq_reg_info_regd(MHZ_TO_KHZ(chan->center_freq),
4edd5698
MM		 2243 regd, bw);
2244 if (!IS_ERR(reg_rule))
2245 break;
2246 }
1fa25e41 2247
361c9c8b 2248 if (IS_ERR(reg_rule)) {
c799ba6e
JB		 2249 pr_debug("Disabling freq %d MHz as custom regd has no rule that fits it\n",
2250 chan->center_freq);
db8dfee5
AN		 2251 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
2252 chan->flags |= IEEE80211_CHAN_DISABLED;
2253 } else {
2254 chan->orig_flags |= IEEE80211_CHAN_DISABLED;
2255 chan->flags = chan->orig_flags;
2256 }
1fa25e41
LR		 2257 return;
2258 }
2259
2260 power_rule = &reg_rule->power_rule;
1aeb135f 2261 bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan);
1fa25e41 2262
2e18b38f 2263 chan->dfs_state_entered = jiffies;
c7ab5081
AN		 2264 chan->dfs_state = NL80211_DFS_USABLE;
2265
2266 chan->beacon_found = false;
db8dfee5
AN		 2267
2268 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
2269 chan->flags = chan->orig_flags | bw_flags |
2270 map_regdom_flags(reg_rule->flags);
2271 else
2272 chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags;
2273
1fa25e41 2274 chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);
279f0f55
FF		 2275 chan->max_reg_power = chan->max_power =
2276 (int) MBM_TO_DBM(power_rule->max_eirp);
2e18b38f
AN		 2277
2278 if (chan->flags & IEEE80211_CHAN_RADAR) {
2279 if (reg_rule->dfs_cac_ms)
2280 chan->dfs_cac_ms = reg_rule->dfs_cac_ms;
2281 else
2282 chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS;
2283 }
2284
2285 chan->max_power = chan->max_reg_power;
1fa25e41
LR		 2286}
2287
fdc9d7b2
JB		 2288static void handle_band_custom(struct wiphy *wiphy,
2289 struct ieee80211_supported_band *sband,
1fa25e41
LR		 2290 const struct ieee80211_regdomain *regd)
2291{
2292 unsigned int i;
1fa25e41 2293
fdc9d7b2
JB		 2294 if (!sband)
2295 return;
1fa25e41
LR		 2296
2297 for (i = 0; i < sband->n_channels; i++)
fdc9d7b2 2298 handle_channel_custom(wiphy, &sband->channels[i], regd);
1fa25e41
LR		 2299}
2300
2301/* Used by drivers prior to wiphy registration */
2302void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
2303 const struct ieee80211_regdomain *regd)
2304{
57fbcce3 2305 enum nl80211_band band;
bbcf3f02 2306 unsigned int bands_set = 0;
ac46d48e 2307
a2f73b6c
LR		 2308 WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG),
2309 "wiphy should have REGULATORY_CUSTOM_REG\n");
2310 wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG;
222ea581 2311
57fbcce3 2312 for (band = 0; band < NUM_NL80211_BANDS; band++) {
bbcf3f02
LR		 2313 if (!wiphy->bands[band])
2314 continue;
fdc9d7b2 2315 handle_band_custom(wiphy, wiphy->bands[band], regd);
bbcf3f02 2316 bands_set++;
b2e1b302 2317 }
bbcf3f02
LR		 2318
2319 /*
2320 * no point in calling this if it won't have any effect
1a919318 2321 * on your device's supported bands.
bbcf3f02
LR		 2322 */
2323 WARN_ON(!bands_set);
b2e1b302 2324}
1fa25e41
LR		 2325EXPORT_SYMBOL(wiphy_apply_custom_regulatory);
2326
b2e253cf
LR		 2327static void reg_set_request_processed(void)
2328{
2329 bool need_more_processing = false;
c492db37 2330 struct regulatory_request *lr = get_last_request();
b2e253cf 2331
c492db37 2332 lr->processed = true;
b2e253cf
LR		 2333
2334 spin_lock(&reg_requests_lock);
2335 if (!list_empty(&reg_requests_list))
2336 need_more_processing = true;
2337 spin_unlock(&reg_requests_lock);
2338
b6863036 2339 cancel_crda_timeout();
a90c7a31 2340
b2e253cf
LR		 2341 if (need_more_processing)
2342 schedule_work(&reg_work);
2343}
2344
b3eb7f3f
LR		 2345/**
2346 * reg_process_hint_core - process core regulatory requests
2347 * @pending_request: a pending core regulatory request
2348 *
2349 * The wireless subsystem can use this function to process
2350 * a regulatory request issued by the regulatory core.
b3eb7f3f 2351 */
d34265a3
JB		 2352static enum reg_request_treatment
2353reg_process_hint_core(struct regulatory_request *core_request)
b3eb7f3f 2354{
cecbb069 2355 if (reg_query_database(core_request)) {
25b20dbd
JB		 2356 core_request->intersect = false;
2357 core_request->processed = false;
2358 reg_update_last_request(core_request);
d34265a3 2359 return REG_REQ_OK;
25b20dbd 2360 }
d34265a3
JB		 2361
2362 return REG_REQ_IGNORE;
b3eb7f3f
LR		 2363}
2364
0d97a619
LR		 2365static enum reg_request_treatment
2366__reg_process_hint_user(struct regulatory_request *user_request)
2367{
2368 struct regulatory_request *lr = get_last_request();
2369
2370 if (reg_request_cell_base(user_request))
2371 return reg_ignore_cell_hint(user_request);
2372
2373 if (reg_request_cell_base(lr))
2374 return REG_REQ_IGNORE;
2375
2376 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)
2377 return REG_REQ_INTERSECT;
2378 /*
2379 * If the user knows better the user should set the regdom
2380 * to their country before the IE is picked up
2381 */
2382 if (lr->initiator == NL80211_REGDOM_SET_BY_USER &&
2383 lr->intersect)
2384 return REG_REQ_IGNORE;
2385 /*
2386 * Process user requests only after previous user/driver/core
2387 * requests have been processed
2388 */
2389 if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE ||
2390 lr->initiator == NL80211_REGDOM_SET_BY_DRIVER ||
2391 lr->initiator == NL80211_REGDOM_SET_BY_USER) &&
2392 regdom_changes(lr->alpha2))
2393 return REG_REQ_IGNORE;
2394
2395 if (!regdom_changes(user_request->alpha2))
2396 return REG_REQ_ALREADY_SET;
2397
2398 return REG_REQ_OK;
2399}
2400
2401/**
2402 * reg_process_hint_user - process user regulatory requests
2403 * @user_request: a pending user regulatory request
2404 *
2405 * The wireless subsystem can use this function to process
2406 * a regulatory request initiated by userspace.
0d97a619 2407 */
d34265a3
JB		 2408static enum reg_request_treatment
2409reg_process_hint_user(struct regulatory_request *user_request)
0d97a619
LR		 2410{
2411 enum reg_request_treatment treatment;
0d97a619
LR		 2412
2413 treatment = __reg_process_hint_user(user_request);
2414 if (treatment == REG_REQ_IGNORE ||
d34265a3
JB		 2415 treatment == REG_REQ_ALREADY_SET)
2416 return REG_REQ_IGNORE;
0d97a619 2417
0d97a619
LR		 2418 user_request->intersect = treatment == REG_REQ_INTERSECT;
2419 user_request->processed = false;
5ad6ef5e 2420
cecbb069 2421 if (reg_query_database(user_request)) {
25b20dbd
JB		 2422 reg_update_last_request(user_request);
2423 user_alpha2[0] = user_request->alpha2[0];
2424 user_alpha2[1] = user_request->alpha2[1];
d34265a3 2425 return REG_REQ_OK;
25b20dbd 2426 }
d34265a3
JB		 2427
2428 return REG_REQ_IGNORE;
0d97a619
LR		 2429}
2430
21636c7f
LR		 2431static enum reg_request_treatment
2432__reg_process_hint_driver(struct regulatory_request *driver_request)
2433{
2434 struct regulatory_request *lr = get_last_request();
2435
2436 if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) {
2437 if (regdom_changes(driver_request->alpha2))
2438 return REG_REQ_OK;
2439 return REG_REQ_ALREADY_SET;
2440 }
2441
2442 /*
2443 * This would happen if you unplug and plug your card
2444 * back in or if you add a new device for which the previously
2445 * loaded card also agrees on the regulatory domain.
2446 */
2447 if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER &&
2448 !regdom_changes(driver_request->alpha2))
2449 return REG_REQ_ALREADY_SET;
2450
2451 return REG_REQ_INTERSECT;
2452}
2453
2454/**
2455 * reg_process_hint_driver - process driver regulatory requests
2456 * @driver_request: a pending driver regulatory request
2457 *
2458 * The wireless subsystem can use this function to process
2459 * a regulatory request issued by an 802.11 driver.
2460 *
2461 * Returns one of the different reg request treatment values.
2462 */
2463static enum reg_request_treatment
2464reg_process_hint_driver(struct wiphy *wiphy,
2465 struct regulatory_request *driver_request)
2466{
34f05f54 2467 const struct ieee80211_regdomain *regd, *tmp;
21636c7f 2468 enum reg_request_treatment treatment;
21636c7f
LR		 2469
2470 treatment = __reg_process_hint_driver(driver_request);
2471
2472 switch (treatment) {
2473 case REG_REQ_OK:
2474 break;
2475 case REG_REQ_IGNORE:
d34265a3 2476 return REG_REQ_IGNORE;
21636c7f 2477 case REG_REQ_INTERSECT:
21636c7f
LR		 2478 case REG_REQ_ALREADY_SET:
2479 regd = reg_copy_regd(get_cfg80211_regdom());
d34265a3
JB		 2480 if (IS_ERR(regd))
2481 return REG_REQ_IGNORE;
34f05f54
AN		 2482
2483 tmp = get_wiphy_regdom(wiphy);
21636c7f 2484 rcu_assign_pointer(wiphy->regd, regd);
34f05f54 2485 rcu_free_regdom(tmp);
21636c7f
LR		 2486 }
2487
21636c7f
LR		 2488
2489 driver_request->intersect = treatment == REG_REQ_INTERSECT;
2490 driver_request->processed = false;
5ad6ef5e 2491
21636c7f
LR		 2492 /*
2493 * Since CRDA will not be called in this case as we already
2494 * have applied the requested regulatory domain before we just
2495 * inform userspace we have processed the request
2496 */
2497 if (treatment == REG_REQ_ALREADY_SET) {
2498 nl80211_send_reg_change_event(driver_request);
25b20dbd 2499 reg_update_last_request(driver_request);
21636c7f 2500 reg_set_request_processed();
480908a7 2501 return REG_REQ_ALREADY_SET;
21636c7f
LR		 2502 }
2503
d34265a3 2504 if (reg_query_database(driver_request)) {
25b20dbd 2505 reg_update_last_request(driver_request);
d34265a3
JB		 2506 return REG_REQ_OK;
2507 }
25b20dbd 2508
d34265a3 2509 return REG_REQ_IGNORE;
21636c7f
LR		 2510}
2511
b23e7a9e
LR		 2512static enum reg_request_treatment
2513__reg_process_hint_country_ie(struct wiphy *wiphy,
2514 struct regulatory_request *country_ie_request)
2515{
2516 struct wiphy *last_wiphy = NULL;
2517 struct regulatory_request *lr = get_last_request();
2518
2519 if (reg_request_cell_base(lr)) {
2520 /* Trust a Cell base station over the AP's country IE */
2521 if (regdom_changes(country_ie_request->alpha2))
2522 return REG_REQ_IGNORE;
2523 return REG_REQ_ALREADY_SET;
2a901468
LR		 2524 } else {
2525 if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE)
2526 return REG_REQ_IGNORE;
b23e7a9e
LR		 2527 }
2528
b23e7a9e
LR		 2529 if (unlikely(!is_an_alpha2(country_ie_request->alpha2)))
2530 return -EINVAL;
2f1c6c57
LR		 2531
2532 if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE)
2533 return REG_REQ_OK;
2534
2535 last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
2536
2537 if (last_wiphy != wiphy) {
b23e7a9e 2538 /*
2f1c6c57
LR		 2539 * Two cards with two APs claiming different
2540 * Country IE alpha2s. We could
2541 * intersect them, but that seems unlikely
2542 * to be correct. Reject second one for now.
b23e7a9e 2543 */
2f1c6c57
LR		 2544 if (regdom_changes(country_ie_request->alpha2))
2545 return REG_REQ_IGNORE;
b23e7a9e
LR		 2546 return REG_REQ_ALREADY_SET;
2547 }
70dcec5a
EG		 2548
2549 if (regdom_changes(country_ie_request->alpha2))
2f1c6c57
LR		 2550 return REG_REQ_OK;
2551 return REG_REQ_ALREADY_SET;
b23e7a9e
LR		 2552}
2553
d1c96a9a 2554/**
b23e7a9e
LR		 2555 * reg_process_hint_country_ie - process regulatory requests from country IEs
2556 * @country_ie_request: a regulatory request from a country IE
d1c96a9a 2557 *
b23e7a9e
LR		 2558 * The wireless subsystem can use this function to process
2559 * a regulatory request issued by a country Information Element.
d1c96a9a 2560 *
2f92212b 2561 * Returns one of the different reg request treatment values.
d1c96a9a 2562 */
2f92212b 2563static enum reg_request_treatment
b23e7a9e
LR		 2564reg_process_hint_country_ie(struct wiphy *wiphy,
2565 struct regulatory_request *country_ie_request)
b2e1b302 2566{
2f92212b 2567 enum reg_request_treatment treatment;
761cf7ec 2568
b23e7a9e 2569 treatment = __reg_process_hint_country_ie(wiphy, country_ie_request);
9c96477d 2570
2f92212b 2571 switch (treatment) {
2f92212b
JB		 2572 case REG_REQ_OK:
2573 break;
b23e7a9e 2574 case REG_REQ_IGNORE:
d34265a3 2575 return REG_REQ_IGNORE;
b23e7a9e 2576 case REG_REQ_ALREADY_SET:
c888393b 2577 reg_free_request(country_ie_request);
480908a7 2578 return REG_REQ_ALREADY_SET;
b23e7a9e 2579 case REG_REQ_INTERSECT:
fb1fc7ad 2580 /*
b23e7a9e
LR		 2581 * This doesn't happen yet, not sure we
2582 * ever want to support it for this case.
fb1fc7ad 2583 */
8db0c433 2584 WARN_ONCE(1, "Unexpected intersection for country elements");
d34265a3 2585 return REG_REQ_IGNORE;
3e0c3ff3 2586 }
b2e1b302 2587
b23e7a9e
LR		 2588 country_ie_request->intersect = false;
2589 country_ie_request->processed = false;
5ad6ef5e 2590
d34265a3 2591 if (reg_query_database(country_ie_request)) {
25b20dbd 2592 reg_update_last_request(country_ie_request);
d34265a3
JB		 2593 return REG_REQ_OK;
2594 }
3e0c3ff3 2595
d34265a3 2596 return REG_REQ_IGNORE;
b2e1b302
LR		 2597}
2598
89766727
VT		 2599bool reg_dfs_domain_same(struct wiphy *wiphy1, struct wiphy *wiphy2)
2600{
2601 const struct ieee80211_regdomain *wiphy1_regd = NULL;
2602 const struct ieee80211_regdomain *wiphy2_regd = NULL;
2603 const struct ieee80211_regdomain *cfg80211_regd = NULL;
2604 bool dfs_domain_same;
2605
2606 rcu_read_lock();
2607
2608 cfg80211_regd = rcu_dereference(cfg80211_regdomain);
2609 wiphy1_regd = rcu_dereference(wiphy1->regd);
2610 if (!wiphy1_regd)
2611 wiphy1_regd = cfg80211_regd;
2612
2613 wiphy2_regd = rcu_dereference(wiphy2->regd);
2614 if (!wiphy2_regd)
2615 wiphy2_regd = cfg80211_regd;
2616
2617 dfs_domain_same = wiphy1_regd->dfs_region == wiphy2_regd->dfs_region;
2618
2619 rcu_read_unlock();
2620
2621 return dfs_domain_same;
2622}
2623
2624static void reg_copy_dfs_chan_state(struct ieee80211_channel *dst_chan,
2625 struct ieee80211_channel *src_chan)
2626{
2627 if (!(dst_chan->flags & IEEE80211_CHAN_RADAR) ||
2628 !(src_chan->flags & IEEE80211_CHAN_RADAR))
2629 return;
2630
2631 if (dst_chan->flags & IEEE80211_CHAN_DISABLED ||
2632 src_chan->flags & IEEE80211_CHAN_DISABLED)
2633 return;
2634
2635 if (src_chan->center_freq == dst_chan->center_freq &&
2636 dst_chan->dfs_state == NL80211_DFS_USABLE) {
2637 dst_chan->dfs_state = src_chan->dfs_state;
2638 dst_chan->dfs_state_entered = src_chan->dfs_state_entered;
2639 }
2640}
2641
2642static void wiphy_share_dfs_chan_state(struct wiphy *dst_wiphy,
2643 struct wiphy *src_wiphy)
2644{
2645 struct ieee80211_supported_band *src_sband, *dst_sband;
2646 struct ieee80211_channel *src_chan, *dst_chan;
2647 int i, j, band;
2648
2649 if (!reg_dfs_domain_same(dst_wiphy, src_wiphy))
2650 return;
2651
2652 for (band = 0; band < NUM_NL80211_BANDS; band++) {
2653 dst_sband = dst_wiphy->bands[band];
2654 src_sband = src_wiphy->bands[band];
2655 if (!dst_sband || !src_sband)
2656 continue;
2657
2658 for (i = 0; i < dst_sband->n_channels; i++) {
2659 dst_chan = &dst_sband->channels[i];
2660 for (j = 0; j < src_sband->n_channels; j++) {
2661 src_chan = &src_sband->channels[j];
2662 reg_copy_dfs_chan_state(dst_chan, src_chan);
2663 }
2664 }
2665 }
2666}
2667
2668static void wiphy_all_share_dfs_chan_state(struct wiphy *wiphy)
2669{
2670 struct cfg80211_registered_device *rdev;
2671
2672 ASSERT_RTNL();
2673
2674 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2675 if (wiphy == &rdev->wiphy)
2676 continue;
2677 wiphy_share_dfs_chan_state(wiphy, &rdev->wiphy);
2678 }
2679}
2680
30a548c7 2681/* This processes *all* regulatory hints */
1daa37c7 2682static void reg_process_hint(struct regulatory_request *reg_request)
fe33eb39 2683{
fe33eb39 2684 struct wiphy *wiphy = NULL;
b3eb7f3f 2685 enum reg_request_treatment treatment;
1db58529 2686 enum nl80211_reg_initiator initiator = reg_request->initiator;
fe33eb39 2687
f4173766 2688 if (reg_request->wiphy_idx != WIPHY_IDX_INVALID)
fe33eb39
LR		 2689 wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx);
2690
1db58529 2691 switch (initiator) {
b3eb7f3f 2692 case NL80211_REGDOM_SET_BY_CORE:
d34265a3
JB		 2693 treatment = reg_process_hint_core(reg_request);
2694 break;
b3eb7f3f 2695 case NL80211_REGDOM_SET_BY_USER:
d34265a3
JB		 2696 treatment = reg_process_hint_user(reg_request);
2697 break;
b3eb7f3f 2698 case NL80211_REGDOM_SET_BY_DRIVER:
772f0389
IP		 2699 if (!wiphy)
2700 goto out_free;
21636c7f
LR		 2701 treatment = reg_process_hint_driver(wiphy, reg_request);
2702 break;
b3eb7f3f 2703 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
772f0389
IP		 2704 if (!wiphy)
2705 goto out_free;
b23e7a9e 2706 treatment = reg_process_hint_country_ie(wiphy, reg_request);
b3eb7f3f
LR		 2707 break;
2708 default:
1db58529 2709 WARN(1, "invalid initiator %d\n", initiator);
772f0389 2710 goto out_free;
b3eb7f3f
LR		 2711 }
2712
d34265a3
JB		 2713 if (treatment == REG_REQ_IGNORE)
2714 goto out_free;
2715
480908a7
JB		 2716 WARN(treatment != REG_REQ_OK && treatment != REG_REQ_ALREADY_SET,
2717 "unexpected treatment value %d\n", treatment);
2718
841b351c
JL		 2719 /* This is required so that the orig_* parameters are saved.
2720 * NOTE: treatment must be set for any case that reaches here!
2721 */
b23e7a9e 2722 if (treatment == REG_REQ_ALREADY_SET && wiphy &&
ad932f04 2723 wiphy->regulatory_flags & REGULATORY_STRICT_REG) {
1db58529 2724 wiphy_update_regulatory(wiphy, initiator);
89766727 2725 wiphy_all_share_dfs_chan_state(wiphy);
ad932f04
AN		 2726 reg_check_channels();
2727 }
772f0389
IP		 2728
2729 return;
2730
2731out_free:
c888393b 2732 reg_free_request(reg_request);
fe33eb39
LR		 2733}
2734
aced43ce
AS		 2735static void notify_self_managed_wiphys(struct regulatory_request *request)
2736{
2737 struct cfg80211_registered_device *rdev;
2738 struct wiphy *wiphy;
2739
2740 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2741 wiphy = &rdev->wiphy;
2742 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED &&
c82c06ce 2743 request->initiator == NL80211_REGDOM_SET_BY_USER)
aced43ce
AS		 2744 reg_call_notifier(wiphy, request);
2745 }
2746}
2747
b2e253cf
LR		 2748/*
2749 * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_*
2750 * Regulatory hints come on a first come first serve basis and we
2751 * must process each one atomically.
2752 */
fe33eb39 2753static void reg_process_pending_hints(void)
b0e2880b 2754{
c492db37 2755 struct regulatory_request *reg_request, *lr;
fe33eb39 2756
c492db37 2757 lr = get_last_request();
b0e2880b 2758
b2e253cf 2759 /* When last_request->processed becomes true this will be rescheduled */
c492db37 2760 if (lr && !lr->processed) {
96cce12f 2761 reg_process_hint(lr);
5fe231e8 2762 return;
b2e253cf
LR		 2763 }
2764
fe33eb39 2765 spin_lock(&reg_requests_lock);
fe33eb39 2766
b2e253cf 2767 if (list_empty(&reg_requests_list)) {
d951c1dd 2768 spin_unlock(&reg_requests_lock);
5fe231e8 2769 return;
fe33eb39 2770 }
b2e253cf
LR		 2771
2772 reg_request = list_first_entry(&reg_requests_list,
2773 struct regulatory_request,
2774 list);
2775 list_del_init(&reg_request->list);
2776
fe33eb39 2777 spin_unlock(&reg_requests_lock);
b0e2880b 2778
aced43ce 2779 notify_self_managed_wiphys(reg_request);
ef51fb1d 2780
1daa37c7 2781 reg_process_hint(reg_request);
2e54a689
B		 2782
2783 lr = get_last_request();
2784
2785 spin_lock(&reg_requests_lock);
2786 if (!list_empty(&reg_requests_list) && lr && lr->processed)
2787 schedule_work(&reg_work);
2788 spin_unlock(&reg_requests_lock);
fe33eb39
LR		 2789}
2790
e38f8a7a
LR		 2791/* Processes beacon hints -- this has nothing to do with country IEs */
2792static void reg_process_pending_beacon_hints(void)
2793{
79c97e97 2794 struct cfg80211_registered_device *rdev;
e38f8a7a
LR		 2795 struct reg_beacon *pending_beacon, *tmp;
2796
e38f8a7a
LR		 2797 /* This goes through the _pending_ beacon list */
2798 spin_lock_bh(&reg_pending_beacons_lock);
2799
e38f8a7a
LR		 2800 list_for_each_entry_safe(pending_beacon, tmp,
2801 &reg_pending_beacons, list) {
e38f8a7a
LR		 2802 list_del_init(&pending_beacon->list);
2803
2804 /* Applies the beacon hint to current wiphys */
79c97e97
JB		 2805 list_for_each_entry(rdev, &cfg80211_rdev_list, list)
2806 wiphy_update_new_beacon(&rdev->wiphy, pending_beacon);
e38f8a7a
LR		 2807
2808 /* Remembers the beacon hint for new wiphys or reg changes */
2809 list_add_tail(&pending_beacon->list, &reg_beacon_list);
2810 }
2811
2812 spin_unlock_bh(&reg_pending_beacons_lock);
e38f8a7a
LR		 2813}
2814
b0d7aa59
JD		 2815static void reg_process_self_managed_hints(void)
2816{
2817 struct cfg80211_registered_device *rdev;
2818 struct wiphy *wiphy;
2819 const struct ieee80211_regdomain *tmp;
2820 const struct ieee80211_regdomain *regd;
57fbcce3 2821 enum nl80211_band band;
b0d7aa59
JD		 2822 struct regulatory_request request = {};
2823
2824 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
2825 wiphy = &rdev->wiphy;
2826
2827 spin_lock(&reg_requests_lock);
2828 regd = rdev->requested_regd;
2829 rdev->requested_regd = NULL;
2830 spin_unlock(&reg_requests_lock);
2831
2832 if (regd == NULL)
2833 continue;
2834
2835 tmp = get_wiphy_regdom(wiphy);
2836 rcu_assign_pointer(wiphy->regd, regd);
2837 rcu_free_regdom(tmp);
2838
57fbcce3 2839 for (band = 0; band < NUM_NL80211_BANDS; band++)
b0d7aa59
JD		 2840 handle_band_custom(wiphy, wiphy->bands[band], regd);
2841
2842 reg_process_ht_flags(wiphy);
2843
2844 request.wiphy_idx = get_wiphy_idx(wiphy);
2845 request.alpha2[0] = regd->alpha2[0];
2846 request.alpha2[1] = regd->alpha2[1];
2847 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
2848
2849 nl80211_send_wiphy_reg_change_event(&request);
2850 }
2851
2852 reg_check_channels();
2853}
2854
fe33eb39
LR		 2855static void reg_todo(struct work_struct *work)
2856{
5fe231e8 2857 rtnl_lock();
fe33eb39 2858 reg_process_pending_hints();
e38f8a7a 2859 reg_process_pending_beacon_hints();
b0d7aa59 2860 reg_process_self_managed_hints();
5fe231e8 2861 rtnl_unlock();
fe33eb39
LR		 2862}
2863
fe33eb39
LR		 2864static void queue_regulatory_request(struct regulatory_request *request)
2865{
d4f2c881
JB		 2866 request->alpha2[0] = toupper(request->alpha2[0]);
2867 request->alpha2[1] = toupper(request->alpha2[1]);
c61029c7 2868
fe33eb39
LR		 2869 spin_lock(&reg_requests_lock);
2870 list_add_tail(&request->list, &reg_requests_list);
2871 spin_unlock(&reg_requests_lock);
2872
2873 schedule_work(&reg_work);
2874}
2875
09d989d1
LR		 2876/*
2877 * Core regulatory hint -- happens during cfg80211_init()
2878 * and when we restore regulatory settings.
2879 */
ba25c141
LR		 2880static int regulatory_hint_core(const char *alpha2)
2881{
2882 struct regulatory_request *request;
2883
1a919318 2884 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
ba25c141
LR		 2885 if (!request)
2886 return -ENOMEM;
2887
2888 request->alpha2[0] = alpha2[0];
2889 request->alpha2[1] = alpha2[1];
7db90f4a 2890 request->initiator = NL80211_REGDOM_SET_BY_CORE;
24f33e64 2891 request->wiphy_idx = WIPHY_IDX_INVALID;
ba25c141 2892
31e99729 2893 queue_regulatory_request(request);
5078b2e3 2894
fe33eb39 2895 return 0;
ba25c141
LR		 2896}
2897
fe33eb39 2898/* User hints */
57b5ce07
LR		 2899int regulatory_hint_user(const char *alpha2,
2900 enum nl80211_user_reg_hint_type user_reg_hint_type)
b2e1b302 2901{
fe33eb39
LR		 2902 struct regulatory_request *request;
2903
fdc9d7b2
JB		 2904 if (WARN_ON(!alpha2))
2905 return -EINVAL;
b2e1b302 2906
fe33eb39
LR		 2907 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2908 if (!request)
2909 return -ENOMEM;
2910
f4173766 2911 request->wiphy_idx = WIPHY_IDX_INVALID;
fe33eb39
LR		 2912 request->alpha2[0] = alpha2[0];
2913 request->alpha2[1] = alpha2[1];
e12822e1 2914 request->initiator = NL80211_REGDOM_SET_BY_USER;
57b5ce07 2915 request->user_reg_hint_type = user_reg_hint_type;
fe33eb39 2916
c37722bd 2917 /* Allow calling CRDA again */
b6863036 2918 reset_crda_timeouts();
c37722bd 2919
fe33eb39
LR		 2920 queue_regulatory_request(request);
2921
2922 return 0;
2923}
2924
05050753 2925int regulatory_hint_indoor(bool is_indoor, u32 portid)
52616f2b 2926{
05050753 2927 spin_lock(&reg_indoor_lock);
52616f2b 2928
05050753
I		 2929 /* It is possible that more than one user space process is trying to
2930 * configure the indoor setting. To handle such cases, clear the indoor
2931 * setting in case that some process does not think that the device
2932 * is operating in an indoor environment. In addition, if a user space
2933 * process indicates that it is controlling the indoor setting, save its
2934 * portid, i.e., make it the owner.
2935 */
2936 reg_is_indoor = is_indoor;
2937 if (reg_is_indoor) {
2938 if (!reg_is_indoor_portid)
2939 reg_is_indoor_portid = portid;
2940 } else {
2941 reg_is_indoor_portid = 0;
2942 }
52616f2b 2943
05050753 2944 spin_unlock(&reg_indoor_lock);
52616f2b 2945
05050753
I		 2946 if (!is_indoor)
2947 reg_check_channels();
52616f2b
IP		 2948
2949 return 0;
2950}
2951
05050753
I		 2952void regulatory_netlink_notify(u32 portid)
2953{
2954 spin_lock(&reg_indoor_lock);
2955
2956 if (reg_is_indoor_portid != portid) {
2957 spin_unlock(&reg_indoor_lock);
2958 return;
2959 }
2960
2961 reg_is_indoor = false;
2962 reg_is_indoor_portid = 0;
2963
2964 spin_unlock(&reg_indoor_lock);
2965
2966 reg_check_channels();
2967}
2968
fe33eb39
LR		 2969/* Driver hints */
2970int regulatory_hint(struct wiphy *wiphy, const char *alpha2)
2971{
2972 struct regulatory_request *request;
2973
fdc9d7b2
JB		 2974 if (WARN_ON(!alpha2 || !wiphy))
2975 return -EINVAL;
fe33eb39 2976
4f7b9140
LR		 2977 wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG;
2978
fe33eb39
LR		 2979 request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
2980 if (!request)
2981 return -ENOMEM;
2982
2983 request->wiphy_idx = get_wiphy_idx(wiphy);
2984
fe33eb39
LR		 2985 request->alpha2[0] = alpha2[0];
2986 request->alpha2[1] = alpha2[1];
7db90f4a 2987 request->initiator = NL80211_REGDOM_SET_BY_DRIVER;
fe33eb39 2988
c37722bd 2989 /* Allow calling CRDA again */
b6863036 2990 reset_crda_timeouts();
c37722bd 2991
fe33eb39
LR		 2992 queue_regulatory_request(request);
2993
2994 return 0;
b2e1b302
LR		 2995}
2996EXPORT_SYMBOL(regulatory_hint);
2997
57fbcce3 2998void regulatory_hint_country_ie(struct wiphy *wiphy, enum nl80211_band band,
789fd033 2999 const u8 *country_ie, u8 country_ie_len)
3f2355cb 3000{
3f2355cb 3001 char alpha2[2];
3f2355cb 3002 enum environment_cap env = ENVIRON_ANY;
db2424c5 3003 struct regulatory_request *request = NULL, *lr;
d335fe63 3004
3f2355cb
LR		 3005 /* IE len must be evenly divisible by 2 */
3006 if (country_ie_len & 0x01)
db2424c5 3007 return;
3f2355cb
LR		 3008
3009 if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
db2424c5
JB		 3010 return;
3011
3012 request = kzalloc(sizeof(*request), GFP_KERNEL);
3013 if (!request)
3014 return;
3f2355cb 3015
3f2355cb
LR		 3016 alpha2[0] = country_ie[0];
3017 alpha2[1] = country_ie[1];
3018
3019 if (country_ie[2] == 'I')
3020 env = ENVIRON_INDOOR;
3021 else if (country_ie[2] == 'O')
3022 env = ENVIRON_OUTDOOR;
3023
db2424c5
JB		 3024 rcu_read_lock();
3025 lr = get_last_request();
3026
3027 if (unlikely(!lr))
3028 goto out;
3029
fb1fc7ad 3030 /*
8b19e6ca 3031 * We will run this only upon a successful connection on cfg80211.
4b44c8bc 3032 * We leave conflict resolution to the workqueue, where can hold
5fe231e8 3033 * the RTNL.
fb1fc7ad 3034 */
c492db37
JB		 3035 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE &&
3036 lr->wiphy_idx != WIPHY_IDX_INVALID)
4b44c8bc 3037 goto out;
3f2355cb 3038
fe33eb39 3039 request->wiphy_idx = get_wiphy_idx(wiphy);
4f366c5d
JL		 3040 request->alpha2[0] = alpha2[0];
3041 request->alpha2[1] = alpha2[1];
7db90f4a 3042 request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE;
fe33eb39
LR		 3043 request->country_ie_env = env;
3044
c37722bd 3045 /* Allow calling CRDA again */
b6863036 3046 reset_crda_timeouts();
c37722bd 3047
fe33eb39 3048 queue_regulatory_request(request);
db2424c5 3049 request = NULL;
3f2355cb 3050out:
db2424c5
JB		 3051 kfree(request);
3052 rcu_read_unlock();
3f2355cb 3053}
b2e1b302 3054
09d989d1
LR		 3055static void restore_alpha2(char *alpha2, bool reset_user)
3056{
3057 /* indicates there is no alpha2 to consider for restoration */
3058 alpha2[0] = '9';
3059 alpha2[1] = '7';
3060
3061 /* The user setting has precedence over the module parameter */
3062 if (is_user_regdom_saved()) {
3063 /* Unless we're asked to ignore it and reset it */
3064 if (reset_user) {
c799ba6e 3065 pr_debug("Restoring regulatory settings including user preference\n");
09d989d1
LR		 3066 user_alpha2[0] = '9';
3067 user_alpha2[1] = '7';
3068
3069 /*
3070 * If we're ignoring user settings, we still need to
3071 * check the module parameter to ensure we put things
3072 * back as they were for a full restore.
3073 */
3074 if (!is_world_regdom(ieee80211_regdom)) {
c799ba6e
JB		 3075 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
3076 ieee80211_regdom[0], ieee80211_regdom[1]);
09d989d1
LR		 3077 alpha2[0] = ieee80211_regdom[0];
3078 alpha2[1] = ieee80211_regdom[1];
3079 }
3080 } else {
c799ba6e
JB		 3081 pr_debug("Restoring regulatory settings while preserving user preference for: %c%c\n",
3082 user_alpha2[0], user_alpha2[1]);
09d989d1
LR		 3083 alpha2[0] = user_alpha2[0];
3084 alpha2[1] = user_alpha2[1];
3085 }
3086 } else if (!is_world_regdom(ieee80211_regdom)) {
c799ba6e
JB		 3087 pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n",
3088 ieee80211_regdom[0], ieee80211_regdom[1]);
09d989d1
LR		 3089 alpha2[0] = ieee80211_regdom[0];
3090 alpha2[1] = ieee80211_regdom[1];
3091 } else
c799ba6e 3092 pr_debug("Restoring regulatory settings\n");
09d989d1
LR		 3093}
3094
5ce543d1
RM		 3095static void restore_custom_reg_settings(struct wiphy *wiphy)
3096{
3097 struct ieee80211_supported_band *sband;
57fbcce3 3098 enum nl80211_band band;
5ce543d1
RM		 3099 struct ieee80211_channel *chan;
3100 int i;
3101
57fbcce3 3102 for (band = 0; band < NUM_NL80211_BANDS; band++) {
5ce543d1
RM		 3103 sband = wiphy->bands[band];
3104 if (!sband)
3105 continue;
3106 for (i = 0; i < sband->n_channels; i++) {
3107 chan = &sband->channels[i];
3108 chan->flags = chan->orig_flags;
3109 chan->max_antenna_gain = chan->orig_mag;
3110 chan->max_power = chan->orig_mpwr;
899852af 3111 chan->beacon_found = false;
5ce543d1
RM		 3112 }
3113 }
3114}
3115
09d989d1
LR		 3116/*
3117 * Restoring regulatory settings involves ingoring any
3118 * possibly stale country IE information and user regulatory
3119 * settings if so desired, this includes any beacon hints
3120 * learned as we could have traveled outside to another country
3121 * after disconnection. To restore regulatory settings we do
3122 * exactly what we did at bootup:
3123 *
3124 * - send a core regulatory hint
3125 * - send a user regulatory hint if applicable
3126 *
3127 * Device drivers that send a regulatory hint for a specific country
3128 * keep their own regulatory domain on wiphy->regd so that does does
3129 * not need to be remembered.
3130 */
e646a025 3131static void restore_regulatory_settings(bool reset_user, bool cached)
09d989d1
LR		 3132{
3133 char alpha2[2];
cee0bec5 3134 char world_alpha2[2];
09d989d1 3135 struct reg_beacon *reg_beacon, *btmp;
14609555 3136 LIST_HEAD(tmp_reg_req_list);
5ce543d1 3137 struct cfg80211_registered_device *rdev;
09d989d1 3138
5fe231e8
JB		 3139 ASSERT_RTNL();
3140
05050753
I		 3141 /*
3142 * Clear the indoor setting in case that it is not controlled by user
3143 * space, as otherwise there is no guarantee that the device is still
3144 * operating in an indoor environment.
3145 */
3146 spin_lock(&reg_indoor_lock);
3147 if (reg_is_indoor && !reg_is_indoor_portid) {
3148 reg_is_indoor = false;
3149 reg_check_channels();
3150 }
3151 spin_unlock(&reg_indoor_lock);
52616f2b 3152
2d319867 3153 reset_regdomains(true, &world_regdom);
09d989d1
LR		 3154 restore_alpha2(alpha2, reset_user);
3155
14609555
LR		 3156 /*
3157 * If there's any pending requests we simply
3158 * stash them to a temporary pending queue and
3159 * add then after we've restored regulatory
3160 * settings.
3161 */
3162 spin_lock(&reg_requests_lock);
eeca9fce 3163 list_splice_tail_init(&reg_requests_list, &tmp_reg_req_list);
14609555
LR		 3164 spin_unlock(&reg_requests_lock);
3165
09d989d1
LR		 3166 /* Clear beacon hints */
3167 spin_lock_bh(&reg_pending_beacons_lock);
fea9bced
JB		 3168 list_for_each_entry_safe(reg_beacon, btmp, &reg_pending_beacons, list) {
3169 list_del(&reg_beacon->list);
3170 kfree(reg_beacon);
09d989d1
LR		 3171 }
3172 spin_unlock_bh(&reg_pending_beacons_lock);
3173
fea9bced
JB		 3174 list_for_each_entry_safe(reg_beacon, btmp, &reg_beacon_list, list) {
3175 list_del(&reg_beacon->list);
3176 kfree(reg_beacon);
09d989d1
LR		 3177 }
3178
3179 /* First restore to the basic regulatory settings */
379b82f4
JB		 3180 world_alpha2[0] = cfg80211_world_regdom->alpha2[0];
3181 world_alpha2[1] = cfg80211_world_regdom->alpha2[1];
09d989d1 3182
5ce543d1 3183 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
b0d7aa59
JD		 3184 if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED)
3185 continue;
a2f73b6c 3186 if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG)
5ce543d1
RM		 3187 restore_custom_reg_settings(&rdev->wiphy);
3188 }
3189
e646a025
JB		 3190 if (cached && (!is_an_alpha2(alpha2) ||
3191 !IS_ERR_OR_NULL(cfg80211_user_regdom))) {
3192 reset_regdomains(false, cfg80211_world_regdom);
3193 update_all_wiphy_regulatory(NL80211_REGDOM_SET_BY_CORE);
3194 print_regdomain(get_cfg80211_regdom());
3195 nl80211_send_reg_change_event(&core_request_world);
3196 reg_set_request_processed();
09d989d1 3197
e646a025
JB		 3198 if (is_an_alpha2(alpha2) &&
3199 !regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER)) {
3200 struct regulatory_request *ureq;
3201
3202 spin_lock(&reg_requests_lock);
3203 ureq = list_last_entry(&reg_requests_list,
3204 struct regulatory_request,
3205 list);
3206 list_del(&ureq->list);
3207 spin_unlock(&reg_requests_lock);
3208
3209 notify_self_managed_wiphys(ureq);
3210 reg_update_last_request(ureq);
3211 set_regdom(reg_copy_regd(cfg80211_user_regdom),
3212 REGD_SOURCE_CACHED);
3213 }
3214 } else {
3215 regulatory_hint_core(world_alpha2);
3216
3217 /*
3218 * This restores the ieee80211_regdom module parameter
3219 * preference or the last user requested regulatory
3220 * settings, user regulatory settings takes precedence.
3221 */
3222 if (is_an_alpha2(alpha2))
3223 regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER);
3224 }
09d989d1 3225
14609555 3226 spin_lock(&reg_requests_lock);
11cff96c 3227 list_splice_tail_init(&tmp_reg_req_list, &reg_requests_list);
14609555
LR		 3228 spin_unlock(&reg_requests_lock);
3229
c799ba6e 3230 pr_debug("Kicking the queue\n");
14609555
LR		 3231
3232 schedule_work(&reg_work);
3233}
09d989d1 3234
7417844b
RKS		 3235static bool is_wiphy_all_set_reg_flag(enum ieee80211_regulatory_flags flag)
3236{
3237 struct cfg80211_registered_device *rdev;
3238 struct wireless_dev *wdev;
3239
3240 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
3241 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
3242 wdev_lock(wdev);
3243 if (!(wdev->wiphy->regulatory_flags & flag)) {
3244 wdev_unlock(wdev);
3245 return false;
3246 }
3247 wdev_unlock(wdev);
3248 }
3249 }
3250
3251 return true;
3252}
3253
09d989d1
LR		 3254void regulatory_hint_disconnect(void)
3255{
7417844b
RKS		 3256 /* Restore of regulatory settings is not required when wiphy(s)
3257 * ignore IE from connected access point but clearance of beacon hints
3258 * is required when wiphy(s) supports beacon hints.
3259 */
3260 if (is_wiphy_all_set_reg_flag(REGULATORY_COUNTRY_IE_IGNORE)) {
3261 struct reg_beacon *reg_beacon, *btmp;
3262
3263 if (is_wiphy_all_set_reg_flag(REGULATORY_DISABLE_BEACON_HINTS))
3264 return;
3265
3266 spin_lock_bh(&reg_pending_beacons_lock);
3267 list_for_each_entry_safe(reg_beacon, btmp,
3268 &reg_pending_beacons, list) {
3269 list_del(&reg_beacon->list);
3270 kfree(reg_beacon);
3271 }
3272 spin_unlock_bh(&reg_pending_beacons_lock);
3273
3274 list_for_each_entry_safe(reg_beacon, btmp,
3275 &reg_beacon_list, list) {
3276 list_del(&reg_beacon->list);
3277 kfree(reg_beacon);
3278 }
3279
3280 return;
3281 }
3282
c799ba6e 3283 pr_debug("All devices are disconnected, going to restore regulatory settings\n");
e646a025 3284 restore_regulatory_settings(false, true);
09d989d1
LR		 3285}
3286
9cf0a0b4 3287static bool freq_is_chan_12_13_14(u32 freq)
e38f8a7a 3288{
57fbcce3
JB		 3289 if (freq == ieee80211_channel_to_frequency(12, NL80211_BAND_2GHZ) ||
3290 freq == ieee80211_channel_to_frequency(13, NL80211_BAND_2GHZ) ||
3291 freq == ieee80211_channel_to_frequency(14, NL80211_BAND_2GHZ))
e38f8a7a
LR		 3292 return true;
3293 return false;
3294}
3295
3ebfa6e7
LR		 3296static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan)
3297{
3298 struct reg_beacon *pending_beacon;
3299
3300 list_for_each_entry(pending_beacon, &reg_pending_beacons, list)
3301 if (beacon_chan->center_freq ==
3302 pending_beacon->chan.center_freq)
3303 return true;
3304 return false;
3305}
3306
e38f8a7a
LR		 3307int regulatory_hint_found_beacon(struct wiphy *wiphy,
3308 struct ieee80211_channel *beacon_chan,
3309 gfp_t gfp)
3310{
3311 struct reg_beacon *reg_beacon;
3ebfa6e7 3312 bool processing;
e38f8a7a 3313
1a919318
JB		 3314 if (beacon_chan->beacon_found ||
3315 beacon_chan->flags & IEEE80211_CHAN_RADAR ||
57fbcce3 3316 (beacon_chan->band == NL80211_BAND_2GHZ &&
1a919318 3317 !freq_is_chan_12_13_14(beacon_chan->center_freq)))
e38f8a7a
LR		 3318 return 0;
3319
3ebfa6e7
LR		 3320 spin_lock_bh(&reg_pending_beacons_lock);
3321 processing = pending_reg_beacon(beacon_chan);
3322 spin_unlock_bh(&reg_pending_beacons_lock);
3323
3324 if (processing)
e38f8a7a
LR		 3325 return 0;
3326
3327 reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp);
3328 if (!reg_beacon)
3329 return -ENOMEM;
3330
c799ba6e
JB		 3331 pr_debug("Found new beacon on frequency: %d MHz (Ch %d) on %s\n",
3332 beacon_chan->center_freq,
3333 ieee80211_frequency_to_channel(beacon_chan->center_freq),
3334 wiphy_name(wiphy));
4113f751 3335
e38f8a7a 3336 memcpy(&reg_beacon->chan, beacon_chan,
1a919318 3337 sizeof(struct ieee80211_channel));
e38f8a7a
LR		 3338
3339 /*
3340 * Since we can be called from BH or and non-BH context
3341 * we must use spin_lock_bh()
3342 */
3343 spin_lock_bh(&reg_pending_beacons_lock);
3344 list_add_tail(&reg_beacon->list, &reg_pending_beacons);
3345 spin_unlock_bh(&reg_pending_beacons_lock);
3346
3347 schedule_work(&reg_work);
3348
3349 return 0;
3350}
3351
a3d2eaf0 3352static void print_rd_rules(const struct ieee80211_regdomain *rd)
b2e1b302
LR		 3353{
3354 unsigned int i;
a3d2eaf0
JB		 3355 const struct ieee80211_reg_rule *reg_rule = NULL;
3356 const struct ieee80211_freq_range *freq_range = NULL;
3357 const struct ieee80211_power_rule *power_rule = NULL;
089027e5 3358 char bw[32], cac_time[32];
b2e1b302 3359
94c4fd64 3360 pr_debug(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n");
b2e1b302
LR		 3361
3362 for (i = 0; i < rd->n_reg_rules; i++) {
3363 reg_rule = &rd->reg_rules[i];
3364 freq_range = &reg_rule->freq_range;
3365 power_rule = &reg_rule->power_rule;
3366
b0dfd2ea
JD		 3367 if (reg_rule->flags & NL80211_RRF_AUTO_BW)
3368 snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO",
3369 freq_range->max_bandwidth_khz,
97524820
JD		 3370 reg_get_max_bandwidth(rd, reg_rule));
3371 else
b0dfd2ea 3372 snprintf(bw, sizeof(bw), "%d KHz",
97524820
JD		 3373 freq_range->max_bandwidth_khz);
3374
089027e5
JD		 3375 if (reg_rule->flags & NL80211_RRF_DFS)
3376 scnprintf(cac_time, sizeof(cac_time), "%u s",
3377 reg_rule->dfs_cac_ms/1000);
3378 else
3379 scnprintf(cac_time, sizeof(cac_time), "N/A");
3380
3381
fb1fc7ad
LR		 3382 /*
3383 * There may not be documentation for max antenna gain
3384 * in certain regions
3385 */
b2e1b302 3386 if (power_rule->max_antenna_gain)
94c4fd64 3387 pr_debug(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n",
b2e1b302
LR		 3388 freq_range->start_freq_khz,
3389 freq_range->end_freq_khz,
97524820 3390 bw,
b2e1b302 3391 power_rule->max_antenna_gain,
089027e5
JD		 3392 power_rule->max_eirp,
3393 cac_time);
b2e1b302 3394 else
94c4fd64 3395 pr_debug(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n",
b2e1b302
LR		 3396 freq_range->start_freq_khz,
3397 freq_range->end_freq_khz,
97524820 3398 bw,
089027e5
JD		 3399 power_rule->max_eirp,
3400 cac_time);
b2e1b302
LR		 3401 }
3402}
3403
4c7d3982 3404bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region)
8b60b078
LR		 3405{
3406 switch (dfs_region) {
3407 case NL80211_DFS_UNSET:
3408 case NL80211_DFS_FCC:
3409 case NL80211_DFS_ETSI:
3410 case NL80211_DFS_JP:
3411 return true;
3412 default:
4a22b00b 3413 pr_debug("Ignoring unknown DFS master region: %d\n", dfs_region);
8b60b078
LR		 3414 return false;
3415 }
3416}
3417
a3d2eaf0 3418static void print_regdomain(const struct ieee80211_regdomain *rd)
b2e1b302 3419{
c492db37 3420 struct regulatory_request *lr = get_last_request();
b2e1b302 3421
3f2355cb 3422 if (is_intersected_alpha2(rd->alpha2)) {
c492db37 3423 if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) {
79c97e97 3424 struct cfg80211_registered_device *rdev;
c492db37 3425 rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx);
79c97e97 3426 if (rdev) {
94c4fd64 3427 pr_debug("Current regulatory domain updated by AP to: %c%c\n",
79c97e97
JB		 3428 rdev->country_ie_alpha2[0],
3429 rdev->country_ie_alpha2[1]);
3f2355cb 3430 } else
94c4fd64 3431 pr_debug("Current regulatory domain intersected:\n");
3f2355cb 3432 } else
94c4fd64 3433 pr_debug("Current regulatory domain intersected:\n");
1a919318 3434 } else if (is_world_regdom(rd->alpha2)) {
94c4fd64 3435 pr_debug("World regulatory domain updated:\n");
1a919318 3436 } else {
b2e1b302 3437 if (is_unknown_alpha2(rd->alpha2))
94c4fd64 3438 pr_debug("Regulatory domain changed to driver built-in settings (unknown country)\n");
57b5ce07 3439 else {
c492db37 3440 if (reg_request_cell_base(lr))
94c4fd64 3441 pr_debug("Regulatory domain changed to country: %c%c by Cell Station\n",
57b5ce07
LR		 3442 rd->alpha2[0], rd->alpha2[1]);
3443 else
94c4fd64 3444 pr_debug("Regulatory domain changed to country: %c%c\n",
57b5ce07
LR		 3445 rd->alpha2[0], rd->alpha2[1]);
3446 }
b2e1b302 3447 }
1a919318 3448
94c4fd64 3449 pr_debug(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region));
b2e1b302
LR		 3450 print_rd_rules(rd);
3451}
3452
2df78167 3453static void print_regdomain_info(const struct ieee80211_regdomain *rd)
b2e1b302 3454{
94c4fd64 3455 pr_debug("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]);
b2e1b302
LR		 3456 print_rd_rules(rd);
3457}
3458
3b9e5aca
LR		 3459static int reg_set_rd_core(const struct ieee80211_regdomain *rd)
3460{
3461 if (!is_world_regdom(rd->alpha2))
3462 return -EINVAL;
3463 update_world_regdomain(rd);
3464 return 0;
3465}
3466
84721d44
LR		 3467static int reg_set_rd_user(const struct ieee80211_regdomain *rd,
3468 struct regulatory_request *user_request)
3469{
3470 const struct ieee80211_regdomain *intersected_rd = NULL;
3471
84721d44
LR		 3472 if (!regdom_changes(rd->alpha2))
3473 return -EALREADY;
3474
3475 if (!is_valid_rd(rd)) {
94c4fd64
DY		 3476 pr_err("Invalid regulatory domain detected: %c%c\n",
3477 rd->alpha2[0], rd->alpha2[1]);
84721d44
LR		 3478 print_regdomain_info(rd);
3479 return -EINVAL;
3480 }
3481
3482 if (!user_request->intersect) {
3483 reset_regdomains(false, rd);
3484 return 0;
3485 }
3486
3487 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
3488 if (!intersected_rd)
3489 return -EINVAL;
3490
3491 kfree(rd);
3492 rd = NULL;
3493 reset_regdomains(false, intersected_rd);
3494
3495 return 0;
3496}
3497
f5fe3247
LR		 3498static int reg_set_rd_driver(const struct ieee80211_regdomain *rd,
3499 struct regulatory_request *driver_request)
b2e1b302 3500{
e9763c3c 3501 const struct ieee80211_regdomain *regd;
9c96477d 3502 const struct ieee80211_regdomain *intersected_rd = NULL;
f5fe3247 3503 const struct ieee80211_regdomain *tmp;
806a9e39 3504 struct wiphy *request_wiphy;
6913b49a 3505
f5fe3247 3506 if (is_world_regdom(rd->alpha2))
b2e1b302
LR		 3507 return -EINVAL;
3508
f5fe3247
LR		 3509 if (!regdom_changes(rd->alpha2))
3510 return -EALREADY;
b2e1b302 3511
8375af3b 3512 if (!is_valid_rd(rd)) {
94c4fd64
DY		 3513 pr_err("Invalid regulatory domain detected: %c%c\n",
3514 rd->alpha2[0], rd->alpha2[1]);
8375af3b
LR		 3515 print_regdomain_info(rd);
3516 return -EINVAL;
b2e1b302
LR		 3517 }
3518
f5fe3247 3519 request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx);
922ec58c 3520 if (!request_wiphy)
de3584bd 3521 return -ENODEV;
806a9e39 3522
f5fe3247 3523 if (!driver_request->intersect) {
558f6d32
LR		 3524 if (request_wiphy->regd)
3525 return -EALREADY;
3e0c3ff3 3526
e9763c3c
JB		 3527 regd = reg_copy_regd(rd);
3528 if (IS_ERR(regd))
3529 return PTR_ERR(regd);
3e0c3ff3 3530
458f4f9e 3531 rcu_assign_pointer(request_wiphy->regd, regd);
379b82f4 3532 reset_regdomains(false, rd);
b8295acd
LR		 3533 return 0;
3534 }
3535
f5fe3247
LR		 3536 intersected_rd = regdom_intersect(rd, get_cfg80211_regdom());
3537 if (!intersected_rd)
3538 return -EINVAL;
b8295acd 3539
f5fe3247
LR		 3540 /*
3541 * We can trash what CRDA provided now.
3542 * However if a driver requested this specific regulatory
3543 * domain we keep it for its private use
3544 */
3545 tmp = get_wiphy_regdom(request_wiphy);
3546 rcu_assign_pointer(request_wiphy->regd, rd);
3547 rcu_free_regdom(tmp);
b8295acd 3548
f5fe3247 3549 rd = NULL;
b7566fc3 3550
f5fe3247 3551 reset_regdomains(false, intersected_rd);
3e0c3ff3 3552
f5fe3247
LR		 3553 return 0;
3554}
3555
01992406
LR		 3556static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd,
3557 struct regulatory_request *country_ie_request)
f5fe3247
LR		 3558{
3559 struct wiphy *request_wiphy;
b8295acd 3560
f5fe3247
LR		 3561 if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) &&
3562 !is_unknown_alpha2(rd->alpha2))
3563 return -EINVAL;
b8295acd 3564
f5fe3247
LR		 3565 /*
3566 * Lets only bother proceeding on the same alpha2 if the current
3567 * rd is non static (it means CRDA was present and was used last)
3568 * and the pending request came in from a country IE
3569 */
3570
3571 if (!is_valid_rd(rd)) {
94c4fd64
DY		 3572 pr_err("Invalid regulatory domain detected: %c%c\n",
3573 rd->alpha2[0], rd->alpha2[1]);
f5fe3247
LR		 3574 print_regdomain_info(rd);
3575 return -EINVAL;
9c96477d
LR		 3576 }
3577
01992406 3578 request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx);
922ec58c 3579 if (!request_wiphy)
f5fe3247 3580 return -ENODEV;
b2e1b302 3581
01992406 3582 if (country_ie_request->intersect)
f5fe3247
LR		 3583 return -EINVAL;
3584
3585 reset_regdomains(false, rd);
3586 return 0;
3587}
b2e1b302 3588
fb1fc7ad
LR		 3589/*
3590 * Use this call to set the current regulatory domain. Conflicts with
b2e1b302 3591 * multiple drivers can be ironed out later. Caller must've already
458f4f9e 3592 * kmalloc'd the rd structure.
fb1fc7ad 3593 */
c37722bd
I		 3594int set_regdom(const struct ieee80211_regdomain *rd,
3595 enum ieee80211_regd_source regd_src)
b2e1b302 3596{
c492db37 3597 struct regulatory_request *lr;
092008ab 3598 bool user_reset = false;
b2e1b302
LR		 3599 int r;
3600
e646a025
JB		 3601 if (IS_ERR_OR_NULL(rd))
3602 return -ENODATA;
3603
3b9e5aca
LR		 3604 if (!reg_is_valid_request(rd->alpha2)) {
3605 kfree(rd);
3606 return -EINVAL;
3607 }
3608
c37722bd 3609 if (regd_src == REGD_SOURCE_CRDA)
b6863036 3610 reset_crda_timeouts();
c37722bd 3611
c492db37 3612 lr = get_last_request();
abc7381b 3613
b2e1b302 3614 /* Note that this doesn't update the wiphys, this is done below */
3b9e5aca
LR		 3615 switch (lr->initiator) {
3616 case NL80211_REGDOM_SET_BY_CORE:
3617 r = reg_set_rd_core(rd);
3618 break;
3619 case NL80211_REGDOM_SET_BY_USER:
e646a025 3620 cfg80211_save_user_regdom(rd);
84721d44 3621 r = reg_set_rd_user(rd, lr);
092008ab 3622 user_reset = true;
84721d44 3623 break;
3b9e5aca 3624 case NL80211_REGDOM_SET_BY_DRIVER:
f5fe3247
LR		 3625 r = reg_set_rd_driver(rd, lr);
3626 break;
3b9e5aca 3627 case NL80211_REGDOM_SET_BY_COUNTRY_IE:
01992406 3628 r = reg_set_rd_country_ie(rd, lr);
3b9e5aca
LR		 3629 break;
3630 default:
3631 WARN(1, "invalid initiator %d\n", lr->initiator);
09d11800 3632 kfree(rd);
3b9e5aca
LR		 3633 return -EINVAL;
3634 }
3635
d2372b31 3636 if (r) {
092008ab
JD		 3637 switch (r) {
3638 case -EALREADY:
95908535 3639 reg_set_request_processed();
092008ab
JD		 3640 break;
3641 default:
3642 /* Back to world regulatory in case of errors */
e646a025 3643 restore_regulatory_settings(user_reset, false);
092008ab 3644 }
95908535 3645
d2372b31 3646 kfree(rd);
38fd2143 3647 return r;
d2372b31 3648 }
b2e1b302 3649
b2e1b302 3650 /* This would make this whole thing pointless */
38fd2143
JB		 3651 if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom()))
3652 return -EINVAL;
b2e1b302
LR		 3653
3654 /* update all wiphys now with the new established regulatory domain */
c492db37 3655 update_all_wiphy_regulatory(lr->initiator);
b2e1b302 3656
458f4f9e 3657 print_regdomain(get_cfg80211_regdom());
b2e1b302 3658
c492db37 3659 nl80211_send_reg_change_event(lr);
73d54c9e 3660
b2e253cf
LR		 3661 reg_set_request_processed();
3662
38fd2143 3663 return 0;
b2e1b302
LR		 3664}
3665
2c3e861c
AN		 3666static int __regulatory_set_wiphy_regd(struct wiphy *wiphy,
3667 struct ieee80211_regdomain *rd)
b0d7aa59
JD		 3668{
3669 const struct ieee80211_regdomain *regd;
3670 const struct ieee80211_regdomain *prev_regd;
3671 struct cfg80211_registered_device *rdev;
3672
3673 if (WARN_ON(!wiphy || !rd))
3674 return -EINVAL;
3675
3676 if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED),
3677 "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n"))
3678 return -EPERM;
3679
3680 if (WARN(!is_valid_rd(rd), "Invalid regulatory domain detected\n")) {
3681 print_regdomain_info(rd);
3682 return -EINVAL;
3683 }
3684
3685 regd = reg_copy_regd(rd);
3686 if (IS_ERR(regd))
3687 return PTR_ERR(regd);
3688
3689 rdev = wiphy_to_rdev(wiphy);
3690
3691 spin_lock(&reg_requests_lock);
3692 prev_regd = rdev->requested_regd;
3693 rdev->requested_regd = regd;
3694 spin_unlock(&reg_requests_lock);
3695
3696 kfree(prev_regd);
2c3e861c
AN		 3697 return 0;
3698}
3699
3700int regulatory_set_wiphy_regd(struct wiphy *wiphy,
3701 struct ieee80211_regdomain *rd)
3702{
3703 int ret = __regulatory_set_wiphy_regd(wiphy, rd);
3704
3705 if (ret)
3706 return ret;
b0d7aa59
JD		 3707
3708 schedule_work(&reg_work);
3709 return 0;
3710}
3711EXPORT_SYMBOL(regulatory_set_wiphy_regd);
3712
2c3e861c
AN		 3713int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy *wiphy,
3714 struct ieee80211_regdomain *rd)
3715{
3716 int ret;
3717
3718 ASSERT_RTNL();
3719
3720 ret = __regulatory_set_wiphy_regd(wiphy, rd);
3721 if (ret)
3722 return ret;
3723
3724 /* process the request immediately */
3725 reg_process_self_managed_hints();
3726 return 0;
3727}
3728EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl);
3729
57b5ce07
LR		 3730void wiphy_regulatory_register(struct wiphy *wiphy)
3731{
aced43ce 3732 struct regulatory_request *lr = get_last_request();
23df0b73 3733
aced43ce
AS		 3734 /* self-managed devices ignore beacon hints and country IE */
3735 if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) {
b0d7aa59
JD		 3736 wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS |
3737 REGULATORY_COUNTRY_IE_IGNORE;
3738
aced43ce
AS		 3739 /*
3740 * The last request may have been received before this
3741 * registration call. Call the driver notifier if
3742 * initiator is USER and user type is CELL_BASE.
3743 */
3744 if (lr->initiator == NL80211_REGDOM_SET_BY_USER &&
3745 lr->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE)
3746 reg_call_notifier(wiphy, lr);
3747 }
3748
57b5ce07
LR		 3749 if (!reg_dev_ignore_cell_hint(wiphy))
3750 reg_num_devs_support_basehint++;
3751
23df0b73 3752 wiphy_update_regulatory(wiphy, lr->initiator);
89766727 3753 wiphy_all_share_dfs_chan_state(wiphy);
57b5ce07
LR		 3754}
3755
bfead080 3756void wiphy_regulatory_deregister(struct wiphy *wiphy)
3f2355cb 3757{
0ad8acaf 3758 struct wiphy *request_wiphy = NULL;
c492db37 3759 struct regulatory_request *lr;
761cf7ec 3760
c492db37 3761 lr = get_last_request();
abc7381b 3762
57b5ce07
LR		 3763 if (!reg_dev_ignore_cell_hint(wiphy))
3764 reg_num_devs_support_basehint--;
3765
458f4f9e 3766 rcu_free_regdom(get_wiphy_regdom(wiphy));
34dd886c 3767 RCU_INIT_POINTER(wiphy->regd, NULL);
0ef9ccdd 3768
c492db37
JB		 3769 if (lr)
3770 request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx);
806a9e39 3771
0ef9ccdd 3772 if (!request_wiphy || request_wiphy != wiphy)
38fd2143 3773 return;
0ef9ccdd 3774
c492db37
JB		 3775 lr->wiphy_idx = WIPHY_IDX_INVALID;
3776 lr->country_ie_env = ENVIRON_ANY;
3f2355cb
LR		 3777}
3778
174e0cd2
IP		 3779/*
3780 * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for
3781 * UNII band definitions
3782 */
3783int cfg80211_get_unii(int freq)
3784{
3785 /* UNII-1 */
3786 if (freq >= 5150 && freq <= 5250)
3787 return 0;
3788
3789 /* UNII-2A */
3790 if (freq > 5250 && freq <= 5350)
3791 return 1;
3792
3793 /* UNII-2B */
3794 if (freq > 5350 && freq <= 5470)
3795 return 2;
3796
3797 /* UNII-2C */
3798 if (freq > 5470 && freq <= 5725)
3799 return 3;
3800
3801 /* UNII-3 */
3802 if (freq > 5725 && freq <= 5825)
3803 return 4;
3804
3805 return -EINVAL;
3806}
3807
c8866e55
IP		 3808bool regulatory_indoor_allowed(void)
3809{
3810 return reg_is_indoor;
3811}
3812
b35a51c7
VT		 3813bool regulatory_pre_cac_allowed(struct wiphy *wiphy)
3814{
3815 const struct ieee80211_regdomain *regd = NULL;
3816 const struct ieee80211_regdomain *wiphy_regd = NULL;
3817 bool pre_cac_allowed = false;
3818
3819 rcu_read_lock();
3820
3821 regd = rcu_dereference(cfg80211_regdomain);
3822 wiphy_regd = rcu_dereference(wiphy->regd);
3823 if (!wiphy_regd) {
3824 if (regd->dfs_region == NL80211_DFS_ETSI)
3825 pre_cac_allowed = true;
3826
3827 rcu_read_unlock();
3828
3829 return pre_cac_allowed;
3830 }
3831
3832 if (regd->dfs_region == wiphy_regd->dfs_region &&
3833 wiphy_regd->dfs_region == NL80211_DFS_ETSI)
3834 pre_cac_allowed = true;
3835
3836 rcu_read_unlock();
3837
3838 return pre_cac_allowed;
3839}
3840
89766727
VT		 3841void regulatory_propagate_dfs_state(struct wiphy *wiphy,
3842 struct cfg80211_chan_def *chandef,
3843 enum nl80211_dfs_state dfs_state,
3844 enum nl80211_radar_event event)
3845{
3846 struct cfg80211_registered_device *rdev;
3847
3848 ASSERT_RTNL();
3849
3850 if (WARN_ON(!cfg80211_chandef_valid(chandef)))
3851 return;
3852
89766727
VT		 3853 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
3854 if (wiphy == &rdev->wiphy)
3855 continue;
3856
3857 if (!reg_dfs_domain_same(wiphy, &rdev->wiphy))
3858 continue;
3859
3860 if (!ieee80211_get_channel(&rdev->wiphy,
3861 chandef->chan->center_freq))
3862 continue;
3863
3864 cfg80211_set_dfs_state(&rdev->wiphy, chandef, dfs_state);
3865
3866 if (event == NL80211_RADAR_DETECTED ||
3867 event == NL80211_RADAR_CAC_FINISHED)
3868 cfg80211_sched_dfs_chan_update(rdev);
3869
3870 nl80211_radar_notify(rdev, chandef, event, NULL, GFP_KERNEL);
3871 }
3872}
3873
d7be102f 3874static int __init regulatory_init_db(void)
b2e1b302 3875{
d7be102f 3876 int err;
734366de 3877
71e5e886
JB		 3878 /*
3879 * It's possible that - due to other bugs/issues - cfg80211
3880 * never called regulatory_init() below, or that it failed;
3881 * in that case, don't try to do any further work here as
3882 * it's doomed to lead to crashes.
3883 */
3884 if (IS_ERR_OR_NULL(reg_pdev))
3885 return -EINVAL;
3886
90a53e44
JB		 3887 err = load_builtin_regdb_keys();
3888 if (err)
3889 return err;
3890
ae9e4b0d 3891 /* We always try to get an update for the static regdomain */
458f4f9e 3892 err = regulatory_hint_core(cfg80211_world_regdom->alpha2);
ba25c141 3893 if (err) {
09d11800
OO		 3894 if (err == -ENOMEM) {
3895 platform_device_unregister(reg_pdev);
bcf4f99b 3896 return err;
09d11800 3897 }
bcf4f99b
LR		 3898 /*
3899 * N.B. kobject_uevent_env() can fail mainly for when we're out
3900 * memory which is handled and propagated appropriately above
3901 * but it can also fail during a netlink_broadcast() or during
3902 * early boot for call_usermodehelper(). For now treat these
3903 * errors as non-fatal.
3904 */
e9c0268f 3905 pr_err("kobject_uevent_env() was unable to call CRDA during init\n");
bcf4f99b 3906 }
734366de 3907
ae9e4b0d
LR		 3908 /*
3909 * Finally, if the user set the module parameter treat it
3910 * as a user hint.
3911 */
3912 if (!is_world_regdom(ieee80211_regdom))
57b5ce07
LR		 3913 regulatory_hint_user(ieee80211_regdom,
3914 NL80211_USER_REG_HINT_USER);
ae9e4b0d 3915
b2e1b302
LR		 3916 return 0;
3917}
d7be102f
JB		 3918#ifndef MODULE
3919late_initcall(regulatory_init_db);
3920#endif
3921
3922int __init regulatory_init(void)
3923{
3924 reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0);
3925 if (IS_ERR(reg_pdev))
3926 return PTR_ERR(reg_pdev);
3927
3928 spin_lock_init(&reg_requests_lock);
3929 spin_lock_init(&reg_pending_beacons_lock);
3930 spin_lock_init(&reg_indoor_lock);
3931
3932 rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom);
3933
3934 user_alpha2[0] = '9';
3935 user_alpha2[1] = '7';
3936
3937#ifdef MODULE
3938 return regulatory_init_db();
3939#else
3940 return 0;
3941#endif
3942}
b2e1b302 3943
1a919318 3944void regulatory_exit(void)
b2e1b302 3945{
fe33eb39 3946 struct regulatory_request *reg_request, *tmp;
e38f8a7a 3947 struct reg_beacon *reg_beacon, *btmp;
fe33eb39
LR		 3948
3949 cancel_work_sync(&reg_work);
b6863036 3950 cancel_crda_timeout_sync();
ad932f04 3951 cancel_delayed_work_sync(&reg_check_chans);
fe33eb39 3952
9027b149 3953 /* Lock to suppress warnings */
38fd2143 3954 rtnl_lock();
379b82f4 3955 reset_regdomains(true, NULL);
38fd2143 3956 rtnl_unlock();
734366de 3957
58ebacc6 3958 dev_set_uevent_suppress(&reg_pdev->dev, true);
f6037d09 3959
b2e1b302 3960 platform_device_unregister(reg_pdev);
734366de 3961
fea9bced
JB		 3962 list_for_each_entry_safe(reg_beacon, btmp, &reg_pending_beacons, list) {
3963 list_del(&reg_beacon->list);
3964 kfree(reg_beacon);
e38f8a7a 3965 }
e38f8a7a 3966
fea9bced
JB		 3967 list_for_each_entry_safe(reg_beacon, btmp, &reg_beacon_list, list) {
3968 list_del(&reg_beacon->list);
3969 kfree(reg_beacon);
e38f8a7a
LR		 3970 }
3971
fea9bced
JB		 3972 list_for_each_entry_safe(reg_request, tmp, &reg_requests_list, list) {
3973 list_del(&reg_request->list);
3974 kfree(reg_request);
fe33eb39 3975 }
007f6c5e
JB		 3976
3977 if (!IS_ERR_OR_NULL(regdb))
3978 kfree(regdb);
e646a025
JB		 3979 if (!IS_ERR_OR_NULL(cfg80211_user_regdom))
3980 kfree(cfg80211_user_regdom);
90a53e44
JB		 3981
3982 free_regdb_keyring();
8318d78a 3983}
Linux 6.x block layer and io_uring tree(s)