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Commit | Line | Data |
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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> |
8318d78a | 6 | * |
3b77d5ec LR |
7 | * Permission to use, copy, modify, and/or distribute this software for any |
8 | * purpose with or without fee is hereby granted, provided that the above | |
9 | * copyright notice and this permission notice appear in all copies. | |
10 | * | |
11 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
12 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
13 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
14 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
15 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
16 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
17 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
8318d78a JB |
18 | */ |
19 | ||
3b77d5ec | 20 | |
b2e1b302 LR |
21 | /** |
22 | * DOC: Wireless regulatory infrastructure | |
8318d78a JB |
23 | * |
24 | * The usual implementation is for a driver to read a device EEPROM to | |
25 | * determine which regulatory domain it should be operating under, then | |
26 | * looking up the allowable channels in a driver-local table and finally | |
27 | * registering those channels in the wiphy structure. | |
28 | * | |
b2e1b302 LR |
29 | * Another set of compliance enforcement is for drivers to use their |
30 | * own compliance limits which can be stored on the EEPROM. The host | |
31 | * driver or firmware may ensure these are used. | |
32 | * | |
33 | * In addition to all this we provide an extra layer of regulatory | |
34 | * conformance. For drivers which do not have any regulatory | |
35 | * information CRDA provides the complete regulatory solution. | |
36 | * For others it provides a community effort on further restrictions | |
37 | * to enhance compliance. | |
38 | * | |
39 | * Note: When number of rules --> infinity we will not be able to | |
40 | * index on alpha2 any more, instead we'll probably have to | |
41 | * rely on some SHA1 checksum of the regdomain for example. | |
42 | * | |
8318d78a | 43 | */ |
e9c0268f JP |
44 | |
45 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
46 | ||
8318d78a | 47 | #include <linux/kernel.h> |
bc3b2d7f | 48 | #include <linux/export.h> |
5a0e3ad6 | 49 | #include <linux/slab.h> |
b2e1b302 | 50 | #include <linux/list.h> |
c61029c7 | 51 | #include <linux/ctype.h> |
b2e1b302 LR |
52 | #include <linux/nl80211.h> |
53 | #include <linux/platform_device.h> | |
d9b93842 | 54 | #include <linux/moduleparam.h> |
b2e1b302 | 55 | #include <net/cfg80211.h> |
8318d78a | 56 | #include "core.h" |
b2e1b302 | 57 | #include "reg.h" |
3b377ea9 | 58 | #include "regdb.h" |
73d54c9e | 59 | #include "nl80211.h" |
8318d78a | 60 | |
4113f751 | 61 | #ifdef CONFIG_CFG80211_REG_DEBUG |
12c5ffb5 JP |
62 | #define REG_DBG_PRINT(format, args...) \ |
63 | printk(KERN_DEBUG pr_fmt(format), ##args) | |
4113f751 | 64 | #else |
8271195e | 65 | #define REG_DBG_PRINT(args...) |
4113f751 LR |
66 | #endif |
67 | ||
2f92212b JB |
68 | enum reg_request_treatment { |
69 | REG_REQ_OK, | |
70 | REG_REQ_IGNORE, | |
71 | REG_REQ_INTERSECT, | |
72 | REG_REQ_ALREADY_SET, | |
73 | }; | |
74 | ||
a042994d LR |
75 | static struct regulatory_request core_request_world = { |
76 | .initiator = NL80211_REGDOM_SET_BY_CORE, | |
77 | .alpha2[0] = '0', | |
78 | .alpha2[1] = '0', | |
79 | .intersect = false, | |
80 | .processed = true, | |
81 | .country_ie_env = ENVIRON_ANY, | |
82 | }; | |
83 | ||
5166ccd2 | 84 | /* Receipt of information from last regulatory request */ |
a042994d | 85 | static struct regulatory_request *last_request = &core_request_world; |
734366de | 86 | |
b2e1b302 LR |
87 | /* To trigger userspace events */ |
88 | static struct platform_device *reg_pdev; | |
8318d78a | 89 | |
4d9d88d1 SJR |
90 | static struct device_type reg_device_type = { |
91 | .uevent = reg_device_uevent, | |
92 | }; | |
93 | ||
fb1fc7ad LR |
94 | /* |
95 | * Central wireless core regulatory domains, we only need two, | |
734366de | 96 | * the current one and a world regulatory domain in case we have no |
e8da2bb4 | 97 | * information to give us an alpha2. |
fb1fc7ad | 98 | */ |
458f4f9e | 99 | const struct ieee80211_regdomain __rcu *cfg80211_regdomain; |
734366de | 100 | |
abc7381b LR |
101 | /* |
102 | * Protects static reg.c components: | |
458f4f9e JB |
103 | * - cfg80211_regdomain (if not used with RCU) |
104 | * - cfg80211_world_regdom | |
105 | * - last_request | |
106 | * - reg_num_devs_support_basehint | |
abc7381b | 107 | */ |
670b7f11 | 108 | static DEFINE_MUTEX(reg_mutex); |
46a5ebaf | 109 | |
57b5ce07 LR |
110 | /* |
111 | * Number of devices that registered to the core | |
112 | * that support cellular base station regulatory hints | |
113 | */ | |
114 | static int reg_num_devs_support_basehint; | |
115 | ||
46a5ebaf JB |
116 | static inline void assert_reg_lock(void) |
117 | { | |
118 | lockdep_assert_held(®_mutex); | |
119 | } | |
abc7381b | 120 | |
458f4f9e JB |
121 | static const struct ieee80211_regdomain *get_cfg80211_regdom(void) |
122 | { | |
123 | return rcu_dereference_protected(cfg80211_regdomain, | |
124 | lockdep_is_held(®_mutex)); | |
125 | } | |
126 | ||
127 | static const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) | |
128 | { | |
129 | return rcu_dereference_protected(wiphy->regd, | |
130 | lockdep_is_held(®_mutex)); | |
131 | } | |
132 | ||
133 | static void rcu_free_regdom(const struct ieee80211_regdomain *r) | |
134 | { | |
135 | if (!r) | |
136 | return; | |
137 | kfree_rcu((struct ieee80211_regdomain *)r, rcu_head); | |
138 | } | |
139 | ||
e38f8a7a | 140 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
141 | static LIST_HEAD(reg_requests_list); |
142 | static spinlock_t reg_requests_lock; | |
143 | ||
e38f8a7a LR |
144 | /* Used to queue up beacon hints for review */ |
145 | static LIST_HEAD(reg_pending_beacons); | |
146 | static spinlock_t reg_pending_beacons_lock; | |
147 | ||
148 | /* Used to keep track of processed beacon hints */ | |
149 | static LIST_HEAD(reg_beacon_list); | |
150 | ||
151 | struct reg_beacon { | |
152 | struct list_head list; | |
153 | struct ieee80211_channel chan; | |
154 | }; | |
155 | ||
f333a7a2 LR |
156 | static void reg_todo(struct work_struct *work); |
157 | static DECLARE_WORK(reg_work, reg_todo); | |
158 | ||
a90c7a31 LR |
159 | static void reg_timeout_work(struct work_struct *work); |
160 | static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work); | |
161 | ||
734366de JB |
162 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
163 | static const struct ieee80211_regdomain world_regdom = { | |
90cdc6df | 164 | .n_reg_rules = 6, |
734366de JB |
165 | .alpha2 = "00", |
166 | .reg_rules = { | |
68798a62 LR |
167 | /* IEEE 802.11b/g, channels 1..11 */ |
168 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
43c771a1 JB |
169 | /* IEEE 802.11b/g, channels 12..13. */ |
170 | REG_RULE(2467-10, 2472+10, 40, 6, 20, | |
3fc71f77 LR |
171 | NL80211_RRF_PASSIVE_SCAN | |
172 | NL80211_RRF_NO_IBSS), | |
611b6a82 LR |
173 | /* IEEE 802.11 channel 14 - Only JP enables |
174 | * this and for 802.11b only */ | |
175 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
176 | NL80211_RRF_PASSIVE_SCAN | | |
177 | NL80211_RRF_NO_IBSS | | |
178 | NL80211_RRF_NO_OFDM), | |
179 | /* IEEE 802.11a, channel 36..48 */ | |
ec329ace | 180 | REG_RULE(5180-10, 5240+10, 40, 6, 20, |
611b6a82 LR |
181 | NL80211_RRF_PASSIVE_SCAN | |
182 | NL80211_RRF_NO_IBSS), | |
3fc71f77 LR |
183 | |
184 | /* NB: 5260 MHz - 5700 MHz requies DFS */ | |
185 | ||
186 | /* IEEE 802.11a, channel 149..165 */ | |
ec329ace | 187 | REG_RULE(5745-10, 5825+10, 40, 6, 20, |
3fc71f77 LR |
188 | NL80211_RRF_PASSIVE_SCAN | |
189 | NL80211_RRF_NO_IBSS), | |
90cdc6df VK |
190 | |
191 | /* IEEE 802.11ad (60gHz), channels 1..3 */ | |
192 | REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), | |
734366de JB |
193 | } |
194 | }; | |
195 | ||
a3d2eaf0 JB |
196 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
197 | &world_regdom; | |
734366de | 198 | |
6ee7d330 | 199 | static char *ieee80211_regdom = "00"; |
09d989d1 | 200 | static char user_alpha2[2]; |
6ee7d330 | 201 | |
734366de JB |
202 | module_param(ieee80211_regdom, charp, 0444); |
203 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
204 | ||
379b82f4 JB |
205 | static void reset_regdomains(bool full_reset, |
206 | const struct ieee80211_regdomain *new_regdom) | |
734366de | 207 | { |
458f4f9e JB |
208 | const struct ieee80211_regdomain *r; |
209 | ||
e8da2bb4 JB |
210 | assert_reg_lock(); |
211 | ||
458f4f9e JB |
212 | r = get_cfg80211_regdom(); |
213 | ||
942b25cf | 214 | /* avoid freeing static information or freeing something twice */ |
458f4f9e JB |
215 | if (r == cfg80211_world_regdom) |
216 | r = NULL; | |
942b25cf JB |
217 | if (cfg80211_world_regdom == &world_regdom) |
218 | cfg80211_world_regdom = NULL; | |
458f4f9e JB |
219 | if (r == &world_regdom) |
220 | r = NULL; | |
942b25cf | 221 | |
458f4f9e JB |
222 | rcu_free_regdom(r); |
223 | rcu_free_regdom(cfg80211_world_regdom); | |
734366de | 224 | |
a3d2eaf0 | 225 | cfg80211_world_regdom = &world_regdom; |
458f4f9e | 226 | rcu_assign_pointer(cfg80211_regdomain, new_regdom); |
a042994d LR |
227 | |
228 | if (!full_reset) | |
229 | return; | |
230 | ||
231 | if (last_request != &core_request_world) | |
232 | kfree(last_request); | |
233 | last_request = &core_request_world; | |
734366de JB |
234 | } |
235 | ||
fb1fc7ad LR |
236 | /* |
237 | * Dynamic world regulatory domain requested by the wireless | |
238 | * core upon initialization | |
239 | */ | |
a3d2eaf0 | 240 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 241 | { |
fdc9d7b2 | 242 | WARN_ON(!last_request); |
734366de | 243 | |
e8da2bb4 JB |
244 | assert_reg_lock(); |
245 | ||
379b82f4 | 246 | reset_regdomains(false, rd); |
734366de JB |
247 | |
248 | cfg80211_world_regdom = rd; | |
734366de | 249 | } |
734366de | 250 | |
a3d2eaf0 | 251 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
252 | { |
253 | if (!alpha2) | |
254 | return false; | |
1a919318 | 255 | return alpha2[0] == '0' && alpha2[1] == '0'; |
b2e1b302 | 256 | } |
8318d78a | 257 | |
a3d2eaf0 | 258 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
259 | { |
260 | if (!alpha2) | |
261 | return false; | |
1a919318 | 262 | return alpha2[0] && alpha2[1]; |
b2e1b302 | 263 | } |
8318d78a | 264 | |
a3d2eaf0 | 265 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
266 | { |
267 | if (!alpha2) | |
268 | return false; | |
fb1fc7ad LR |
269 | /* |
270 | * Special case where regulatory domain was built by driver | |
271 | * but a specific alpha2 cannot be determined | |
272 | */ | |
1a919318 | 273 | return alpha2[0] == '9' && alpha2[1] == '9'; |
b2e1b302 | 274 | } |
8318d78a | 275 | |
3f2355cb LR |
276 | static bool is_intersected_alpha2(const char *alpha2) |
277 | { | |
278 | if (!alpha2) | |
279 | return false; | |
fb1fc7ad LR |
280 | /* |
281 | * Special case where regulatory domain is the | |
3f2355cb | 282 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
283 | * structures |
284 | */ | |
1a919318 | 285 | return alpha2[0] == '9' && alpha2[1] == '8'; |
3f2355cb LR |
286 | } |
287 | ||
a3d2eaf0 | 288 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
289 | { |
290 | if (!alpha2) | |
291 | return false; | |
1a919318 | 292 | return isalpha(alpha2[0]) && isalpha(alpha2[1]); |
b2e1b302 | 293 | } |
8318d78a | 294 | |
a3d2eaf0 | 295 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
296 | { |
297 | if (!alpha2_x || !alpha2_y) | |
298 | return false; | |
1a919318 | 299 | return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; |
b2e1b302 LR |
300 | } |
301 | ||
69b1572b | 302 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 303 | { |
458f4f9e | 304 | const struct ieee80211_regdomain *r = get_cfg80211_regdom(); |
761cf7ec | 305 | |
458f4f9e | 306 | if (!r) |
b2e1b302 | 307 | return true; |
458f4f9e | 308 | return !alpha2_equal(r->alpha2, alpha2); |
b2e1b302 LR |
309 | } |
310 | ||
09d989d1 LR |
311 | /* |
312 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
313 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
314 | * has ever been issued. | |
315 | */ | |
316 | static bool is_user_regdom_saved(void) | |
317 | { | |
318 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
319 | return false; | |
320 | ||
321 | /* This would indicate a mistake on the design */ | |
1a919318 | 322 | if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), |
09d989d1 | 323 | "Unexpected user alpha2: %c%c\n", |
1a919318 | 324 | user_alpha2[0], user_alpha2[1])) |
09d989d1 LR |
325 | return false; |
326 | ||
327 | return true; | |
328 | } | |
329 | ||
e9763c3c JB |
330 | static const struct ieee80211_regdomain * |
331 | reg_copy_regd(const struct ieee80211_regdomain *src_regd) | |
3b377ea9 JL |
332 | { |
333 | struct ieee80211_regdomain *regd; | |
e9763c3c | 334 | int size_of_regd; |
3b377ea9 JL |
335 | unsigned int i; |
336 | ||
82f20856 JB |
337 | size_of_regd = |
338 | sizeof(struct ieee80211_regdomain) + | |
339 | src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); | |
3b377ea9 JL |
340 | |
341 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
342 | if (!regd) | |
e9763c3c | 343 | return ERR_PTR(-ENOMEM); |
3b377ea9 JL |
344 | |
345 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
346 | ||
347 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
348 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
e9763c3c | 349 | sizeof(struct ieee80211_reg_rule)); |
3b377ea9 | 350 | |
e9763c3c | 351 | return regd; |
3b377ea9 JL |
352 | } |
353 | ||
354 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB | |
355 | struct reg_regdb_search_request { | |
356 | char alpha2[2]; | |
357 | struct list_head list; | |
358 | }; | |
359 | ||
360 | static LIST_HEAD(reg_regdb_search_list); | |
368d06f5 | 361 | static DEFINE_MUTEX(reg_regdb_search_mutex); |
3b377ea9 JL |
362 | |
363 | static void reg_regdb_search(struct work_struct *work) | |
364 | { | |
365 | struct reg_regdb_search_request *request; | |
e9763c3c JB |
366 | const struct ieee80211_regdomain *curdom, *regdom = NULL; |
367 | int i; | |
a85d0d7f LR |
368 | |
369 | mutex_lock(&cfg80211_mutex); | |
3b377ea9 | 370 | |
368d06f5 | 371 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 JL |
372 | while (!list_empty(®_regdb_search_list)) { |
373 | request = list_first_entry(®_regdb_search_list, | |
374 | struct reg_regdb_search_request, | |
375 | list); | |
376 | list_del(&request->list); | |
377 | ||
1a919318 | 378 | for (i = 0; i < reg_regdb_size; i++) { |
3b377ea9 JL |
379 | curdom = reg_regdb[i]; |
380 | ||
1a919318 | 381 | if (alpha2_equal(request->alpha2, curdom->alpha2)) { |
e9763c3c | 382 | regdom = reg_copy_regd(curdom); |
3b377ea9 JL |
383 | break; |
384 | } | |
385 | } | |
386 | ||
387 | kfree(request); | |
388 | } | |
368d06f5 | 389 | mutex_unlock(®_regdb_search_mutex); |
a85d0d7f | 390 | |
e9763c3c | 391 | if (!IS_ERR_OR_NULL(regdom)) |
a85d0d7f LR |
392 | set_regdom(regdom); |
393 | ||
394 | mutex_unlock(&cfg80211_mutex); | |
3b377ea9 JL |
395 | } |
396 | ||
397 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); | |
398 | ||
399 | static void reg_regdb_query(const char *alpha2) | |
400 | { | |
401 | struct reg_regdb_search_request *request; | |
402 | ||
403 | if (!alpha2) | |
404 | return; | |
405 | ||
406 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); | |
407 | if (!request) | |
408 | return; | |
409 | ||
410 | memcpy(request->alpha2, alpha2, 2); | |
411 | ||
368d06f5 | 412 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 | 413 | list_add_tail(&request->list, ®_regdb_search_list); |
368d06f5 | 414 | mutex_unlock(®_regdb_search_mutex); |
3b377ea9 JL |
415 | |
416 | schedule_work(®_regdb_work); | |
417 | } | |
80007efe LR |
418 | |
419 | /* Feel free to add any other sanity checks here */ | |
420 | static void reg_regdb_size_check(void) | |
421 | { | |
422 | /* We should ideally BUILD_BUG_ON() but then random builds would fail */ | |
423 | WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); | |
424 | } | |
3b377ea9 | 425 | #else |
80007efe | 426 | static inline void reg_regdb_size_check(void) {} |
3b377ea9 JL |
427 | static inline void reg_regdb_query(const char *alpha2) {} |
428 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ | |
429 | ||
fb1fc7ad LR |
430 | /* |
431 | * This lets us keep regulatory code which is updated on a regulatory | |
4d9d88d1 SJR |
432 | * basis in userspace. Country information is filled in by |
433 | * reg_device_uevent | |
fb1fc7ad | 434 | */ |
b2e1b302 LR |
435 | static int call_crda(const char *alpha2) |
436 | { | |
b2e1b302 | 437 | if (!is_world_regdom((char *) alpha2)) |
e9c0268f | 438 | pr_info("Calling CRDA for country: %c%c\n", |
b2e1b302 LR |
439 | alpha2[0], alpha2[1]); |
440 | else | |
e9c0268f | 441 | pr_info("Calling CRDA to update world regulatory domain\n"); |
b2e1b302 | 442 | |
3b377ea9 JL |
443 | /* query internal regulatory database (if it exists) */ |
444 | reg_regdb_query(alpha2); | |
445 | ||
4d9d88d1 | 446 | return kobject_uevent(®_pdev->dev.kobj, KOBJ_CHANGE); |
b2e1b302 LR |
447 | } |
448 | ||
6913b49a | 449 | static bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 450 | { |
6913b49a JB |
451 | assert_reg_lock(); |
452 | ||
f6037d09 JB |
453 | if (!last_request) |
454 | return false; | |
455 | ||
6913b49a JB |
456 | if (last_request->processed) |
457 | return false; | |
458 | ||
f6037d09 | 459 | return alpha2_equal(last_request->alpha2, alpha2); |
b2e1b302 | 460 | } |
8318d78a | 461 | |
b2e1b302 | 462 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 463 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 464 | { |
a3d2eaf0 | 465 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
466 | u32 freq_diff; |
467 | ||
91e99004 | 468 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
469 | return false; |
470 | ||
471 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
472 | return false; | |
473 | ||
474 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
475 | ||
bd05f28e | 476 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
1a919318 | 477 | freq_range->max_bandwidth_khz > freq_diff) |
b2e1b302 LR |
478 | return false; |
479 | ||
480 | return true; | |
481 | } | |
482 | ||
a3d2eaf0 | 483 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 484 | { |
a3d2eaf0 | 485 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 486 | unsigned int i; |
8318d78a | 487 | |
b2e1b302 LR |
488 | if (!rd->n_reg_rules) |
489 | return false; | |
8318d78a | 490 | |
88dc1c3f LR |
491 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
492 | return false; | |
493 | ||
b2e1b302 LR |
494 | for (i = 0; i < rd->n_reg_rules; i++) { |
495 | reg_rule = &rd->reg_rules[i]; | |
496 | if (!is_valid_reg_rule(reg_rule)) | |
497 | return false; | |
498 | } | |
499 | ||
500 | return true; | |
8318d78a JB |
501 | } |
502 | ||
038659e7 | 503 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
fe7ef5e9 | 504 | u32 center_freq_khz, u32 bw_khz) |
b2e1b302 | 505 | { |
038659e7 LR |
506 | u32 start_freq_khz, end_freq_khz; |
507 | ||
508 | start_freq_khz = center_freq_khz - (bw_khz/2); | |
509 | end_freq_khz = center_freq_khz + (bw_khz/2); | |
510 | ||
511 | if (start_freq_khz >= freq_range->start_freq_khz && | |
512 | end_freq_khz <= freq_range->end_freq_khz) | |
513 | return true; | |
514 | ||
515 | return false; | |
b2e1b302 | 516 | } |
8318d78a | 517 | |
0c7dc45d LR |
518 | /** |
519 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
520 | * @freq_range: frequency rule we want to query | |
521 | * @freq_khz: frequency we are inquiring about | |
522 | * | |
523 | * This lets us know if a specific frequency rule is or is not relevant to | |
524 | * a specific frequency's band. Bands are device specific and artificial | |
64629b9d VK |
525 | * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), |
526 | * however it is safe for now to assume that a frequency rule should not be | |
527 | * part of a frequency's band if the start freq or end freq are off by more | |
528 | * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the | |
529 | * 60 GHz band. | |
0c7dc45d LR |
530 | * This resolution can be lowered and should be considered as we add |
531 | * regulatory rule support for other "bands". | |
532 | **/ | |
533 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
1a919318 | 534 | u32 freq_khz) |
0c7dc45d LR |
535 | { |
536 | #define ONE_GHZ_IN_KHZ 1000000 | |
64629b9d VK |
537 | /* |
538 | * From 802.11ad: directional multi-gigabit (DMG): | |
539 | * Pertaining to operation in a frequency band containing a channel | |
540 | * with the Channel starting frequency above 45 GHz. | |
541 | */ | |
542 | u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? | |
543 | 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; | |
544 | if (abs(freq_khz - freq_range->start_freq_khz) <= limit) | |
0c7dc45d | 545 | return true; |
64629b9d | 546 | if (abs(freq_khz - freq_range->end_freq_khz) <= limit) |
0c7dc45d LR |
547 | return true; |
548 | return false; | |
549 | #undef ONE_GHZ_IN_KHZ | |
550 | } | |
551 | ||
fb1fc7ad LR |
552 | /* |
553 | * Helper for regdom_intersect(), this does the real | |
554 | * mathematical intersection fun | |
555 | */ | |
1a919318 JB |
556 | static int reg_rules_intersect(const struct ieee80211_reg_rule *rule1, |
557 | const struct ieee80211_reg_rule *rule2, | |
558 | struct ieee80211_reg_rule *intersected_rule) | |
9c96477d LR |
559 | { |
560 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
561 | struct ieee80211_freq_range *freq_range; | |
562 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
563 | struct ieee80211_power_rule *power_rule; | |
564 | u32 freq_diff; | |
565 | ||
566 | freq_range1 = &rule1->freq_range; | |
567 | freq_range2 = &rule2->freq_range; | |
568 | freq_range = &intersected_rule->freq_range; | |
569 | ||
570 | power_rule1 = &rule1->power_rule; | |
571 | power_rule2 = &rule2->power_rule; | |
572 | power_rule = &intersected_rule->power_rule; | |
573 | ||
574 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
1a919318 | 575 | freq_range2->start_freq_khz); |
9c96477d | 576 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
1a919318 | 577 | freq_range2->end_freq_khz); |
9c96477d | 578 | freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, |
1a919318 | 579 | freq_range2->max_bandwidth_khz); |
9c96477d LR |
580 | |
581 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
582 | if (freq_range->max_bandwidth_khz > freq_diff) | |
583 | freq_range->max_bandwidth_khz = freq_diff; | |
584 | ||
585 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
586 | power_rule2->max_eirp); | |
587 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
588 | power_rule2->max_antenna_gain); | |
589 | ||
1a919318 | 590 | intersected_rule->flags = rule1->flags | rule2->flags; |
9c96477d LR |
591 | |
592 | if (!is_valid_reg_rule(intersected_rule)) | |
593 | return -EINVAL; | |
594 | ||
595 | return 0; | |
596 | } | |
597 | ||
598 | /** | |
599 | * regdom_intersect - do the intersection between two regulatory domains | |
600 | * @rd1: first regulatory domain | |
601 | * @rd2: second regulatory domain | |
602 | * | |
603 | * Use this function to get the intersection between two regulatory domains. | |
604 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
605 | * as no one single alpha2 can represent this regulatory domain. | |
606 | * | |
607 | * Returns a pointer to the regulatory domain structure which will hold the | |
608 | * resulting intersection of rules between rd1 and rd2. We will | |
609 | * kzalloc() this structure for you. | |
610 | */ | |
1a919318 JB |
611 | static struct ieee80211_regdomain * |
612 | regdom_intersect(const struct ieee80211_regdomain *rd1, | |
613 | const struct ieee80211_regdomain *rd2) | |
9c96477d LR |
614 | { |
615 | int r, size_of_regd; | |
616 | unsigned int x, y; | |
617 | unsigned int num_rules = 0, rule_idx = 0; | |
618 | const struct ieee80211_reg_rule *rule1, *rule2; | |
619 | struct ieee80211_reg_rule *intersected_rule; | |
620 | struct ieee80211_regdomain *rd; | |
621 | /* This is just a dummy holder to help us count */ | |
74f53cd8 | 622 | struct ieee80211_reg_rule dummy_rule; |
9c96477d LR |
623 | |
624 | if (!rd1 || !rd2) | |
625 | return NULL; | |
626 | ||
fb1fc7ad LR |
627 | /* |
628 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
629 | * build them. This is to so we can malloc() and free() a |
630 | * regdomain once. The reason we use reg_rules_intersect() here | |
631 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
632 | * All rules that do check out OK are valid. |
633 | */ | |
9c96477d LR |
634 | |
635 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
636 | rule1 = &rd1->reg_rules[x]; | |
637 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
638 | rule2 = &rd2->reg_rules[y]; | |
74f53cd8 | 639 | if (!reg_rules_intersect(rule1, rule2, &dummy_rule)) |
9c96477d | 640 | num_rules++; |
9c96477d LR |
641 | } |
642 | } | |
643 | ||
644 | if (!num_rules) | |
645 | return NULL; | |
646 | ||
647 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
82f20856 | 648 | num_rules * sizeof(struct ieee80211_reg_rule); |
9c96477d LR |
649 | |
650 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
651 | if (!rd) | |
652 | return NULL; | |
653 | ||
8a57fff0 | 654 | for (x = 0; x < rd1->n_reg_rules && rule_idx < num_rules; x++) { |
9c96477d | 655 | rule1 = &rd1->reg_rules[x]; |
8a57fff0 | 656 | for (y = 0; y < rd2->n_reg_rules && rule_idx < num_rules; y++) { |
9c96477d | 657 | rule2 = &rd2->reg_rules[y]; |
fb1fc7ad LR |
658 | /* |
659 | * This time around instead of using the stack lets | |
9c96477d | 660 | * write to the target rule directly saving ourselves |
fb1fc7ad LR |
661 | * a memcpy() |
662 | */ | |
9c96477d | 663 | intersected_rule = &rd->reg_rules[rule_idx]; |
1a919318 | 664 | r = reg_rules_intersect(rule1, rule2, intersected_rule); |
fb1fc7ad LR |
665 | /* |
666 | * No need to memset here the intersected rule here as | |
667 | * we're not using the stack anymore | |
668 | */ | |
9c96477d LR |
669 | if (r) |
670 | continue; | |
671 | rule_idx++; | |
672 | } | |
673 | } | |
674 | ||
675 | if (rule_idx != num_rules) { | |
676 | kfree(rd); | |
677 | return NULL; | |
678 | } | |
679 | ||
680 | rd->n_reg_rules = num_rules; | |
681 | rd->alpha2[0] = '9'; | |
682 | rd->alpha2[1] = '8'; | |
683 | ||
684 | return rd; | |
685 | } | |
686 | ||
fb1fc7ad LR |
687 | /* |
688 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
689 | * want to just have the channel structure use these | |
690 | */ | |
b2e1b302 LR |
691 | static u32 map_regdom_flags(u32 rd_flags) |
692 | { | |
693 | u32 channel_flags = 0; | |
694 | if (rd_flags & NL80211_RRF_PASSIVE_SCAN) | |
695 | channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; | |
696 | if (rd_flags & NL80211_RRF_NO_IBSS) | |
697 | channel_flags |= IEEE80211_CHAN_NO_IBSS; | |
698 | if (rd_flags & NL80211_RRF_DFS) | |
699 | channel_flags |= IEEE80211_CHAN_RADAR; | |
03f6b084 SF |
700 | if (rd_flags & NL80211_RRF_NO_OFDM) |
701 | channel_flags |= IEEE80211_CHAN_NO_OFDM; | |
b2e1b302 LR |
702 | return channel_flags; |
703 | } | |
704 | ||
fe7ef5e9 | 705 | static int freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq, |
1fa25e41 | 706 | const struct ieee80211_reg_rule **reg_rule, |
5d885b99 | 707 | const struct ieee80211_regdomain *regd) |
8318d78a JB |
708 | { |
709 | int i; | |
0c7dc45d | 710 | bool band_rule_found = false; |
038659e7 LR |
711 | bool bw_fits = false; |
712 | ||
3e0c3ff3 | 713 | if (!regd) |
b2e1b302 LR |
714 | return -EINVAL; |
715 | ||
3e0c3ff3 | 716 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
717 | const struct ieee80211_reg_rule *rr; |
718 | const struct ieee80211_freq_range *fr = NULL; | |
b2e1b302 | 719 | |
3e0c3ff3 | 720 | rr = ®d->reg_rules[i]; |
b2e1b302 | 721 | fr = &rr->freq_range; |
0c7dc45d | 722 | |
fb1fc7ad LR |
723 | /* |
724 | * We only need to know if one frequency rule was | |
0c7dc45d | 725 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
726 | * not overwrite it once found |
727 | */ | |
0c7dc45d LR |
728 | if (!band_rule_found) |
729 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
730 | ||
fe7ef5e9 | 731 | bw_fits = reg_does_bw_fit(fr, center_freq, MHZ_TO_KHZ(20)); |
0c7dc45d | 732 | |
038659e7 | 733 | if (band_rule_found && bw_fits) { |
b2e1b302 | 734 | *reg_rule = rr; |
038659e7 | 735 | return 0; |
8318d78a JB |
736 | } |
737 | } | |
738 | ||
0c7dc45d LR |
739 | if (!band_rule_found) |
740 | return -ERANGE; | |
741 | ||
038659e7 | 742 | return -EINVAL; |
b2e1b302 LR |
743 | } |
744 | ||
fe7ef5e9 | 745 | int freq_reg_info(struct wiphy *wiphy, u32 center_freq, |
038659e7 | 746 | const struct ieee80211_reg_rule **reg_rule) |
1fa25e41 | 747 | { |
5d885b99 JB |
748 | const struct ieee80211_regdomain *regd; |
749 | ||
750 | assert_reg_lock(); | |
1a919318 | 751 | |
5d885b99 JB |
752 | /* |
753 | * Follow the driver's regulatory domain, if present, unless a country | |
754 | * IE has been processed or a user wants to help complaince further | |
755 | */ | |
756 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
757 | last_request->initiator != NL80211_REGDOM_SET_BY_USER && | |
758 | wiphy->regd) | |
458f4f9e | 759 | regd = get_wiphy_regdom(wiphy); |
5d885b99 | 760 | else |
458f4f9e | 761 | regd = get_cfg80211_regdom(); |
5d885b99 | 762 | |
fe7ef5e9 | 763 | return freq_reg_info_regd(wiphy, center_freq, reg_rule, regd); |
1fa25e41 | 764 | } |
4f366c5d | 765 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 766 | |
926a0a09 LR |
767 | #ifdef CONFIG_CFG80211_REG_DEBUG |
768 | static const char *reg_initiator_name(enum nl80211_reg_initiator initiator) | |
769 | { | |
770 | switch (initiator) { | |
771 | case NL80211_REGDOM_SET_BY_CORE: | |
772 | return "Set by core"; | |
773 | case NL80211_REGDOM_SET_BY_USER: | |
774 | return "Set by user"; | |
775 | case NL80211_REGDOM_SET_BY_DRIVER: | |
776 | return "Set by driver"; | |
777 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: | |
778 | return "Set by country IE"; | |
779 | default: | |
780 | WARN_ON(1); | |
781 | return "Set by bug"; | |
782 | } | |
783 | } | |
e702d3cf LR |
784 | |
785 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, | |
e702d3cf LR |
786 | const struct ieee80211_reg_rule *reg_rule) |
787 | { | |
788 | const struct ieee80211_power_rule *power_rule; | |
789 | const struct ieee80211_freq_range *freq_range; | |
790 | char max_antenna_gain[32]; | |
791 | ||
792 | power_rule = ®_rule->power_rule; | |
793 | freq_range = ®_rule->freq_range; | |
794 | ||
795 | if (!power_rule->max_antenna_gain) | |
796 | snprintf(max_antenna_gain, 32, "N/A"); | |
797 | else | |
798 | snprintf(max_antenna_gain, 32, "%d", power_rule->max_antenna_gain); | |
799 | ||
fe7ef5e9 JB |
800 | REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n", |
801 | chan->center_freq); | |
e702d3cf | 802 | |
56e6786e | 803 | REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n", |
1a919318 JB |
804 | freq_range->start_freq_khz, freq_range->end_freq_khz, |
805 | freq_range->max_bandwidth_khz, max_antenna_gain, | |
e702d3cf LR |
806 | power_rule->max_eirp); |
807 | } | |
808 | #else | |
809 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, | |
e702d3cf LR |
810 | const struct ieee80211_reg_rule *reg_rule) |
811 | { | |
812 | return; | |
813 | } | |
926a0a09 LR |
814 | #endif |
815 | ||
038659e7 LR |
816 | /* |
817 | * Note that right now we assume the desired channel bandwidth | |
818 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
fe7ef5e9 | 819 | * per channel, the primary and the extension channel). |
038659e7 | 820 | */ |
7ca43d03 LR |
821 | static void handle_channel(struct wiphy *wiphy, |
822 | enum nl80211_reg_initiator initiator, | |
fdc9d7b2 | 823 | struct ieee80211_channel *chan) |
b2e1b302 LR |
824 | { |
825 | int r; | |
038659e7 | 826 | u32 flags, bw_flags = 0; |
b2e1b302 LR |
827 | const struct ieee80211_reg_rule *reg_rule = NULL; |
828 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 829 | const struct ieee80211_freq_range *freq_range = NULL; |
fe33eb39 | 830 | struct wiphy *request_wiphy = NULL; |
a92a3ce7 | 831 | |
806a9e39 LR |
832 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
833 | ||
a92a3ce7 | 834 | flags = chan->orig_flags; |
b2e1b302 | 835 | |
fe7ef5e9 | 836 | r = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq), ®_rule); |
ca4ffe8f LR |
837 | if (r) { |
838 | /* | |
839 | * We will disable all channels that do not match our | |
25985edc | 840 | * received regulatory rule unless the hint is coming |
ca4ffe8f LR |
841 | * from a Country IE and the Country IE had no information |
842 | * about a band. The IEEE 802.11 spec allows for an AP | |
843 | * to send only a subset of the regulatory rules allowed, | |
844 | * so an AP in the US that only supports 2.4 GHz may only send | |
845 | * a country IE with information for the 2.4 GHz band | |
846 | * while 5 GHz is still supported. | |
847 | */ | |
848 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
849 | r == -ERANGE) | |
850 | return; | |
851 | ||
d91e41b6 | 852 | REG_DBG_PRINT("Disabling freq %d MHz\n", chan->center_freq); |
ca4ffe8f | 853 | chan->flags = IEEE80211_CHAN_DISABLED; |
8318d78a | 854 | return; |
ca4ffe8f | 855 | } |
8318d78a | 856 | |
fe7ef5e9 | 857 | chan_reg_rule_print_dbg(chan, reg_rule); |
e702d3cf | 858 | |
b2e1b302 | 859 | power_rule = ®_rule->power_rule; |
038659e7 LR |
860 | freq_range = ®_rule->freq_range; |
861 | ||
862 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
863 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
b2e1b302 | 864 | |
7db90f4a | 865 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 866 | request_wiphy && request_wiphy == wiphy && |
5be83de5 | 867 | request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { |
fb1fc7ad | 868 | /* |
25985edc | 869 | * This guarantees the driver's requested regulatory domain |
f976376d | 870 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
871 | * settings |
872 | */ | |
f976376d | 873 | chan->flags = chan->orig_flags = |
038659e7 | 874 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
875 | chan->max_antenna_gain = chan->orig_mag = |
876 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
279f0f55 | 877 | chan->max_reg_power = chan->max_power = chan->orig_mpwr = |
f976376d LR |
878 | (int) MBM_TO_DBM(power_rule->max_eirp); |
879 | return; | |
880 | } | |
881 | ||
aa3d7eef | 882 | chan->beacon_found = false; |
038659e7 | 883 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
1a919318 JB |
884 | chan->max_antenna_gain = |
885 | min_t(int, chan->orig_mag, | |
886 | MBI_TO_DBI(power_rule->max_antenna_gain)); | |
eccc068e | 887 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
5e31fc08 SG |
888 | if (chan->orig_mpwr) { |
889 | /* | |
890 | * Devices that have their own custom regulatory domain | |
891 | * but also use WIPHY_FLAG_STRICT_REGULATORY will follow the | |
892 | * passed country IE power settings. | |
893 | */ | |
894 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
895 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && | |
896 | wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) | |
897 | chan->max_power = chan->max_reg_power; | |
898 | else | |
899 | chan->max_power = min(chan->orig_mpwr, | |
900 | chan->max_reg_power); | |
901 | } else | |
902 | chan->max_power = chan->max_reg_power; | |
8318d78a JB |
903 | } |
904 | ||
fdc9d7b2 JB |
905 | static void handle_band(struct wiphy *wiphy, |
906 | enum nl80211_reg_initiator initiator, | |
907 | struct ieee80211_supported_band *sband) | |
8318d78a | 908 | { |
a92a3ce7 | 909 | unsigned int i; |
a92a3ce7 | 910 | |
fdc9d7b2 JB |
911 | if (!sband) |
912 | return; | |
8318d78a JB |
913 | |
914 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 915 | handle_channel(wiphy, initiator, &sband->channels[i]); |
8318d78a JB |
916 | } |
917 | ||
57b5ce07 LR |
918 | static bool reg_request_cell_base(struct regulatory_request *request) |
919 | { | |
920 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
921 | return false; | |
1a919318 | 922 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; |
57b5ce07 LR |
923 | } |
924 | ||
925 | bool reg_last_request_cell_base(void) | |
926 | { | |
ebd0fd2b | 927 | bool val; |
1a919318 | 928 | |
57b5ce07 | 929 | mutex_lock(®_mutex); |
ebd0fd2b | 930 | val = reg_request_cell_base(last_request); |
57b5ce07 | 931 | mutex_unlock(®_mutex); |
1a919318 | 932 | |
ebd0fd2b | 933 | return val; |
57b5ce07 LR |
934 | } |
935 | ||
936 | #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS | |
57b5ce07 | 937 | /* Core specific check */ |
2f92212b JB |
938 | static enum reg_request_treatment |
939 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 LR |
940 | { |
941 | if (!reg_num_devs_support_basehint) | |
2f92212b | 942 | return REG_REQ_IGNORE; |
57b5ce07 | 943 | |
1a919318 JB |
944 | if (reg_request_cell_base(last_request) && |
945 | !regdom_changes(pending_request->alpha2)) | |
2f92212b | 946 | return REG_REQ_ALREADY_SET; |
1a919318 | 947 | |
2f92212b | 948 | return REG_REQ_OK; |
57b5ce07 LR |
949 | } |
950 | ||
951 | /* Device specific check */ | |
952 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
953 | { | |
1a919318 | 954 | return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); |
57b5ce07 LR |
955 | } |
956 | #else | |
957 | static int reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
958 | { | |
2f92212b | 959 | return REG_REQ_IGNORE; |
57b5ce07 | 960 | } |
1a919318 JB |
961 | |
962 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
57b5ce07 LR |
963 | { |
964 | return true; | |
965 | } | |
966 | #endif | |
967 | ||
968 | ||
7db90f4a LR |
969 | static bool ignore_reg_update(struct wiphy *wiphy, |
970 | enum nl80211_reg_initiator initiator) | |
14b9815a | 971 | { |
926a0a09 | 972 | if (!last_request) { |
1a919318 | 973 | REG_DBG_PRINT("Ignoring regulatory request %s since last_request is not set\n", |
926a0a09 | 974 | reg_initiator_name(initiator)); |
14b9815a | 975 | return true; |
926a0a09 LR |
976 | } |
977 | ||
7db90f4a | 978 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
926a0a09 | 979 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { |
1a919318 | 980 | REG_DBG_PRINT("Ignoring regulatory request %s since the driver uses its own custom regulatory domain\n", |
926a0a09 | 981 | reg_initiator_name(initiator)); |
14b9815a | 982 | return true; |
926a0a09 LR |
983 | } |
984 | ||
fb1fc7ad LR |
985 | /* |
986 | * wiphy->regd will be set once the device has its own | |
987 | * desired regulatory domain set | |
988 | */ | |
5be83de5 | 989 | if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd && |
749b527b | 990 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
926a0a09 | 991 | !is_world_regdom(last_request->alpha2)) { |
1a919318 | 992 | REG_DBG_PRINT("Ignoring regulatory request %s since the driver requires its own regulatory domain to be set first\n", |
926a0a09 | 993 | reg_initiator_name(initiator)); |
14b9815a | 994 | return true; |
926a0a09 LR |
995 | } |
996 | ||
57b5ce07 LR |
997 | if (reg_request_cell_base(last_request)) |
998 | return reg_dev_ignore_cell_hint(wiphy); | |
999 | ||
14b9815a LR |
1000 | return false; |
1001 | } | |
1002 | ||
1a919318 | 1003 | static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, |
e38f8a7a LR |
1004 | struct reg_beacon *reg_beacon) |
1005 | { | |
e38f8a7a LR |
1006 | struct ieee80211_supported_band *sband; |
1007 | struct ieee80211_channel *chan; | |
6bad8766 LR |
1008 | bool channel_changed = false; |
1009 | struct ieee80211_channel chan_before; | |
e38f8a7a | 1010 | |
e38f8a7a LR |
1011 | sband = wiphy->bands[reg_beacon->chan.band]; |
1012 | chan = &sband->channels[chan_idx]; | |
1013 | ||
1014 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1015 | return; | |
1016 | ||
6bad8766 LR |
1017 | if (chan->beacon_found) |
1018 | return; | |
1019 | ||
1020 | chan->beacon_found = true; | |
1021 | ||
5be83de5 | 1022 | if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) |
37184244 LR |
1023 | return; |
1024 | ||
6bad8766 LR |
1025 | chan_before.center_freq = chan->center_freq; |
1026 | chan_before.flags = chan->flags; | |
1027 | ||
37184244 | 1028 | if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { |
e38f8a7a | 1029 | chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; |
6bad8766 | 1030 | channel_changed = true; |
e38f8a7a LR |
1031 | } |
1032 | ||
37184244 | 1033 | if (chan->flags & IEEE80211_CHAN_NO_IBSS) { |
e38f8a7a | 1034 | chan->flags &= ~IEEE80211_CHAN_NO_IBSS; |
6bad8766 | 1035 | channel_changed = true; |
e38f8a7a LR |
1036 | } |
1037 | ||
6bad8766 LR |
1038 | if (channel_changed) |
1039 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1040 | } |
1041 | ||
1042 | /* | |
1043 | * Called when a scan on a wiphy finds a beacon on | |
1044 | * new channel | |
1045 | */ | |
1046 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1047 | struct reg_beacon *reg_beacon) | |
1048 | { | |
1049 | unsigned int i; | |
1050 | struct ieee80211_supported_band *sband; | |
1051 | ||
e38f8a7a LR |
1052 | if (!wiphy->bands[reg_beacon->chan.band]) |
1053 | return; | |
1054 | ||
1055 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1056 | ||
1057 | for (i = 0; i < sband->n_channels; i++) | |
1058 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1059 | } | |
1060 | ||
1061 | /* | |
1062 | * Called upon reg changes or a new wiphy is added | |
1063 | */ | |
1064 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1065 | { | |
1066 | unsigned int i; | |
1067 | struct ieee80211_supported_band *sband; | |
1068 | struct reg_beacon *reg_beacon; | |
1069 | ||
e38f8a7a LR |
1070 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
1071 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1072 | continue; | |
1073 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1074 | for (i = 0; i < sband->n_channels; i++) | |
1075 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1076 | } | |
1077 | } | |
1078 | ||
1079 | static bool reg_is_world_roaming(struct wiphy *wiphy) | |
1080 | { | |
458f4f9e JB |
1081 | const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); |
1082 | const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); | |
e8da2bb4 | 1083 | |
458f4f9e | 1084 | if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) |
e38f8a7a | 1085 | return true; |
458f4f9e | 1086 | |
b1ed8ddd LR |
1087 | if (last_request && |
1088 | last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
5be83de5 | 1089 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) |
e38f8a7a | 1090 | return true; |
458f4f9e | 1091 | |
e38f8a7a LR |
1092 | return false; |
1093 | } | |
1094 | ||
1095 | /* Reap the advantages of previously found beacons */ | |
1096 | static void reg_process_beacons(struct wiphy *wiphy) | |
1097 | { | |
b1ed8ddd LR |
1098 | /* |
1099 | * Means we are just firing up cfg80211, so no beacons would | |
1100 | * have been processed yet. | |
1101 | */ | |
1102 | if (!last_request) | |
1103 | return; | |
e38f8a7a LR |
1104 | if (!reg_is_world_roaming(wiphy)) |
1105 | return; | |
1106 | wiphy_update_beacon_reg(wiphy); | |
1107 | } | |
1108 | ||
1a919318 | 1109 | static bool is_ht40_allowed(struct ieee80211_channel *chan) |
038659e7 LR |
1110 | { |
1111 | if (!chan) | |
1a919318 | 1112 | return false; |
038659e7 | 1113 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
1a919318 | 1114 | return false; |
038659e7 | 1115 | /* This would happen when regulatory rules disallow HT40 completely */ |
1a919318 | 1116 | return !(chan->flags & IEEE80211_CHAN_NO_HT40); |
038659e7 LR |
1117 | } |
1118 | ||
1119 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
fdc9d7b2 | 1120 | struct ieee80211_channel *channel) |
038659e7 | 1121 | { |
fdc9d7b2 | 1122 | struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; |
038659e7 LR |
1123 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
1124 | unsigned int i; | |
1125 | ||
1a919318 | 1126 | if (!is_ht40_allowed(channel)) { |
038659e7 LR |
1127 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
1128 | return; | |
1129 | } | |
1130 | ||
1131 | /* | |
1132 | * We need to ensure the extension channels exist to | |
1133 | * be able to use HT40- or HT40+, this finds them (or not) | |
1134 | */ | |
1135 | for (i = 0; i < sband->n_channels; i++) { | |
1136 | struct ieee80211_channel *c = &sband->channels[i]; | |
1a919318 | 1137 | |
038659e7 LR |
1138 | if (c->center_freq == (channel->center_freq - 20)) |
1139 | channel_before = c; | |
1140 | if (c->center_freq == (channel->center_freq + 20)) | |
1141 | channel_after = c; | |
1142 | } | |
1143 | ||
1144 | /* | |
1145 | * Please note that this assumes target bandwidth is 20 MHz, | |
1146 | * if that ever changes we also need to change the below logic | |
1147 | * to include that as well. | |
1148 | */ | |
1a919318 | 1149 | if (!is_ht40_allowed(channel_before)) |
689da1b3 | 1150 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1151 | else |
689da1b3 | 1152 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1153 | |
1a919318 | 1154 | if (!is_ht40_allowed(channel_after)) |
689da1b3 | 1155 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 1156 | else |
689da1b3 | 1157 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
1158 | } |
1159 | ||
1160 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
fdc9d7b2 | 1161 | struct ieee80211_supported_band *sband) |
038659e7 LR |
1162 | { |
1163 | unsigned int i; | |
038659e7 | 1164 | |
fdc9d7b2 JB |
1165 | if (!sband) |
1166 | return; | |
038659e7 LR |
1167 | |
1168 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1169 | reg_process_ht_flags_channel(wiphy, &sband->channels[i]); |
038659e7 LR |
1170 | } |
1171 | ||
1172 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1173 | { | |
1174 | enum ieee80211_band band; | |
1175 | ||
1176 | if (!wiphy) | |
1177 | return; | |
1178 | ||
fdc9d7b2 JB |
1179 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1180 | reg_process_ht_flags_band(wiphy, wiphy->bands[band]); | |
038659e7 LR |
1181 | } |
1182 | ||
eac03e38 SN |
1183 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
1184 | enum nl80211_reg_initiator initiator) | |
b2e1b302 LR |
1185 | { |
1186 | enum ieee80211_band band; | |
d46e5b1d | 1187 | |
eac03e38 SN |
1188 | assert_reg_lock(); |
1189 | ||
7db90f4a | 1190 | if (ignore_reg_update(wiphy, initiator)) |
a203c2aa SN |
1191 | return; |
1192 | ||
458f4f9e | 1193 | last_request->dfs_region = get_cfg80211_regdom()->dfs_region; |
b68e6b3b | 1194 | |
fdc9d7b2 JB |
1195 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1196 | handle_band(wiphy, initiator, wiphy->bands[band]); | |
a203c2aa | 1197 | |
e38f8a7a | 1198 | reg_process_beacons(wiphy); |
038659e7 | 1199 | reg_process_ht_flags(wiphy); |
1a919318 | 1200 | |
560e28e1 | 1201 | if (wiphy->reg_notifier) |
716f9392 | 1202 | wiphy->reg_notifier(wiphy, last_request); |
b2e1b302 LR |
1203 | } |
1204 | ||
d7549cbb SN |
1205 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
1206 | { | |
1207 | struct cfg80211_registered_device *rdev; | |
4a38994f | 1208 | struct wiphy *wiphy; |
d7549cbb | 1209 | |
458f4f9e JB |
1210 | assert_cfg80211_lock(); |
1211 | ||
4a38994f RM |
1212 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1213 | wiphy = &rdev->wiphy; | |
1214 | wiphy_update_regulatory(wiphy, initiator); | |
1215 | /* | |
1216 | * Regulatory updates set by CORE are ignored for custom | |
1217 | * regulatory cards. Let us notify the changes to the driver, | |
1218 | * as some drivers used this to restore its orig_* reg domain. | |
1219 | */ | |
1220 | if (initiator == NL80211_REGDOM_SET_BY_CORE && | |
1221 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && | |
1222 | wiphy->reg_notifier) | |
1223 | wiphy->reg_notifier(wiphy, last_request); | |
1224 | } | |
d7549cbb SN |
1225 | } |
1226 | ||
1fa25e41 | 1227 | static void handle_channel_custom(struct wiphy *wiphy, |
fdc9d7b2 | 1228 | struct ieee80211_channel *chan, |
1fa25e41 LR |
1229 | const struct ieee80211_regdomain *regd) |
1230 | { | |
1231 | int r; | |
038659e7 | 1232 | u32 bw_flags = 0; |
1fa25e41 LR |
1233 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1234 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1235 | const struct ieee80211_freq_range *freq_range = NULL; |
1fa25e41 | 1236 | |
1a919318 | 1237 | r = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), |
fe7ef5e9 | 1238 | ®_rule, regd); |
1fa25e41 LR |
1239 | |
1240 | if (r) { | |
fe7ef5e9 JB |
1241 | REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n", |
1242 | chan->center_freq); | |
1fa25e41 LR |
1243 | chan->flags = IEEE80211_CHAN_DISABLED; |
1244 | return; | |
1245 | } | |
1246 | ||
fe7ef5e9 | 1247 | chan_reg_rule_print_dbg(chan, reg_rule); |
e702d3cf | 1248 | |
1fa25e41 | 1249 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1250 | freq_range = ®_rule->freq_range; |
1251 | ||
1252 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
1253 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
1fa25e41 | 1254 | |
038659e7 | 1255 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
1fa25e41 | 1256 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
279f0f55 FF |
1257 | chan->max_reg_power = chan->max_power = |
1258 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
1fa25e41 LR |
1259 | } |
1260 | ||
fdc9d7b2 JB |
1261 | static void handle_band_custom(struct wiphy *wiphy, |
1262 | struct ieee80211_supported_band *sband, | |
1fa25e41 LR |
1263 | const struct ieee80211_regdomain *regd) |
1264 | { | |
1265 | unsigned int i; | |
1fa25e41 | 1266 | |
fdc9d7b2 JB |
1267 | if (!sband) |
1268 | return; | |
1fa25e41 LR |
1269 | |
1270 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1271 | handle_channel_custom(wiphy, &sband->channels[i], regd); |
1fa25e41 LR |
1272 | } |
1273 | ||
1274 | /* Used by drivers prior to wiphy registration */ | |
1275 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1276 | const struct ieee80211_regdomain *regd) | |
1277 | { | |
1278 | enum ieee80211_band band; | |
bbcf3f02 | 1279 | unsigned int bands_set = 0; |
ac46d48e | 1280 | |
1fa25e41 | 1281 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
bbcf3f02 LR |
1282 | if (!wiphy->bands[band]) |
1283 | continue; | |
fdc9d7b2 | 1284 | handle_band_custom(wiphy, wiphy->bands[band], regd); |
bbcf3f02 | 1285 | bands_set++; |
b2e1b302 | 1286 | } |
bbcf3f02 LR |
1287 | |
1288 | /* | |
1289 | * no point in calling this if it won't have any effect | |
1a919318 | 1290 | * on your device's supported bands. |
bbcf3f02 LR |
1291 | */ |
1292 | WARN_ON(!bands_set); | |
b2e1b302 | 1293 | } |
1fa25e41 LR |
1294 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1295 | ||
84fa4f43 JB |
1296 | /* This has the logic which determines when a new request |
1297 | * should be ignored. */ | |
2f92212b JB |
1298 | static enum reg_request_treatment |
1299 | get_reg_request_treatment(struct wiphy *wiphy, | |
2f92cd2e | 1300 | struct regulatory_request *pending_request) |
84fa4f43 | 1301 | { |
806a9e39 | 1302 | struct wiphy *last_wiphy = NULL; |
761cf7ec | 1303 | |
84fa4f43 JB |
1304 | /* All initial requests are respected */ |
1305 | if (!last_request) | |
2f92212b | 1306 | return REG_REQ_OK; |
84fa4f43 | 1307 | |
2f92cd2e | 1308 | switch (pending_request->initiator) { |
7db90f4a | 1309 | case NL80211_REGDOM_SET_BY_CORE: |
2f92212b | 1310 | return REG_REQ_OK; |
7db90f4a | 1311 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
57b5ce07 LR |
1312 | if (reg_request_cell_base(last_request)) { |
1313 | /* Trust a Cell base station over the AP's country IE */ | |
1314 | if (regdom_changes(pending_request->alpha2)) | |
2f92212b JB |
1315 | return REG_REQ_IGNORE; |
1316 | return REG_REQ_ALREADY_SET; | |
57b5ce07 LR |
1317 | } |
1318 | ||
806a9e39 LR |
1319 | last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
1320 | ||
2f92cd2e | 1321 | if (unlikely(!is_an_alpha2(pending_request->alpha2))) |
84fa4f43 | 1322 | return -EINVAL; |
7db90f4a LR |
1323 | if (last_request->initiator == |
1324 | NL80211_REGDOM_SET_BY_COUNTRY_IE) { | |
806a9e39 | 1325 | if (last_wiphy != wiphy) { |
84fa4f43 JB |
1326 | /* |
1327 | * Two cards with two APs claiming different | |
1fe90b03 | 1328 | * Country IE alpha2s. We could |
84fa4f43 JB |
1329 | * intersect them, but that seems unlikely |
1330 | * to be correct. Reject second one for now. | |
1331 | */ | |
2f92cd2e | 1332 | if (regdom_changes(pending_request->alpha2)) |
2f92212b JB |
1333 | return REG_REQ_IGNORE; |
1334 | return REG_REQ_ALREADY_SET; | |
84fa4f43 | 1335 | } |
fb1fc7ad LR |
1336 | /* |
1337 | * Two consecutive Country IE hints on the same wiphy. | |
1338 | * This should be picked up early by the driver/stack | |
1339 | */ | |
2f92cd2e | 1340 | if (WARN_ON(regdom_changes(pending_request->alpha2))) |
2f92212b JB |
1341 | return REG_REQ_OK; |
1342 | return REG_REQ_ALREADY_SET; | |
84fa4f43 | 1343 | } |
a171fba4 | 1344 | return 0; |
7db90f4a LR |
1345 | case NL80211_REGDOM_SET_BY_DRIVER: |
1346 | if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) { | |
2f92cd2e | 1347 | if (regdom_changes(pending_request->alpha2)) |
2f92212b JB |
1348 | return REG_REQ_OK; |
1349 | return REG_REQ_ALREADY_SET; | |
e74b1e7f | 1350 | } |
fff32c04 LR |
1351 | |
1352 | /* | |
1353 | * This would happen if you unplug and plug your card | |
1354 | * back in or if you add a new device for which the previously | |
1355 | * loaded card also agrees on the regulatory domain. | |
1356 | */ | |
7db90f4a | 1357 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
2f92cd2e | 1358 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 1359 | return REG_REQ_ALREADY_SET; |
fff32c04 | 1360 | |
2f92212b | 1361 | return REG_REQ_INTERSECT; |
7db90f4a | 1362 | case NL80211_REGDOM_SET_BY_USER: |
57b5ce07 LR |
1363 | if (reg_request_cell_base(pending_request)) |
1364 | return reg_ignore_cell_hint(pending_request); | |
1365 | ||
1366 | if (reg_request_cell_base(last_request)) | |
2f92212b | 1367 | return REG_REQ_IGNORE; |
57b5ce07 | 1368 | |
7db90f4a | 1369 | if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) |
2f92212b | 1370 | return REG_REQ_INTERSECT; |
fb1fc7ad LR |
1371 | /* |
1372 | * If the user knows better the user should set the regdom | |
1373 | * to their country before the IE is picked up | |
1374 | */ | |
7db90f4a | 1375 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER && |
1a919318 | 1376 | last_request->intersect) |
2f92212b | 1377 | return REG_REQ_IGNORE; |
fb1fc7ad LR |
1378 | /* |
1379 | * Process user requests only after previous user/driver/core | |
1380 | * requests have been processed | |
1381 | */ | |
1a919318 JB |
1382 | if ((last_request->initiator == NL80211_REGDOM_SET_BY_CORE || |
1383 | last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1384 | last_request->initiator == NL80211_REGDOM_SET_BY_USER) && | |
1385 | regdom_changes(last_request->alpha2)) | |
2f92212b | 1386 | return REG_REQ_IGNORE; |
5eebade6 | 1387 | |
baeb66fe | 1388 | if (!regdom_changes(pending_request->alpha2)) |
2f92212b | 1389 | return REG_REQ_ALREADY_SET; |
e74b1e7f | 1390 | |
2f92212b | 1391 | return REG_REQ_OK; |
84fa4f43 JB |
1392 | } |
1393 | ||
2f92212b | 1394 | return REG_REQ_IGNORE; |
84fa4f43 JB |
1395 | } |
1396 | ||
b2e253cf LR |
1397 | static void reg_set_request_processed(void) |
1398 | { | |
1399 | bool need_more_processing = false; | |
1400 | ||
1401 | last_request->processed = true; | |
1402 | ||
1403 | spin_lock(®_requests_lock); | |
1404 | if (!list_empty(®_requests_list)) | |
1405 | need_more_processing = true; | |
1406 | spin_unlock(®_requests_lock); | |
1407 | ||
a90c7a31 | 1408 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) |
fe20b39e | 1409 | cancel_delayed_work(®_timeout); |
a90c7a31 | 1410 | |
b2e253cf LR |
1411 | if (need_more_processing) |
1412 | schedule_work(®_work); | |
1413 | } | |
1414 | ||
d1c96a9a LR |
1415 | /** |
1416 | * __regulatory_hint - hint to the wireless core a regulatory domain | |
1417 | * @wiphy: if the hint comes from country information from an AP, this | |
1418 | * is required to be set to the wiphy that received the information | |
28da32d7 | 1419 | * @pending_request: the regulatory request currently being processed |
d1c96a9a LR |
1420 | * |
1421 | * The Wireless subsystem can use this function to hint to the wireless core | |
28da32d7 | 1422 | * what it believes should be the current regulatory domain. |
d1c96a9a | 1423 | * |
2f92212b | 1424 | * Returns one of the different reg request treatment values. |
d1c96a9a | 1425 | * |
458f4f9e | 1426 | * Caller must hold ®_mutex |
d1c96a9a | 1427 | */ |
2f92212b JB |
1428 | static enum reg_request_treatment |
1429 | __regulatory_hint(struct wiphy *wiphy, | |
1430 | struct regulatory_request *pending_request) | |
b2e1b302 | 1431 | { |
e9763c3c | 1432 | const struct ieee80211_regdomain *regd; |
9c96477d | 1433 | bool intersect = false; |
2f92212b | 1434 | enum reg_request_treatment treatment; |
b2e1b302 | 1435 | |
2f92212b | 1436 | treatment = get_reg_request_treatment(wiphy, pending_request); |
9c96477d | 1437 | |
2f92212b JB |
1438 | switch (treatment) { |
1439 | case REG_REQ_INTERSECT: | |
7db90f4a LR |
1440 | if (pending_request->initiator == |
1441 | NL80211_REGDOM_SET_BY_DRIVER) { | |
458f4f9e | 1442 | regd = reg_copy_regd(get_cfg80211_regdom()); |
e9763c3c | 1443 | if (IS_ERR(regd)) { |
d951c1dd | 1444 | kfree(pending_request); |
e9763c3c | 1445 | return PTR_ERR(regd); |
d951c1dd | 1446 | } |
458f4f9e | 1447 | rcu_assign_pointer(wiphy->regd, regd); |
3e0c3ff3 | 1448 | } |
9c96477d | 1449 | intersect = true; |
2f92212b JB |
1450 | break; |
1451 | case REG_REQ_OK: | |
1452 | break; | |
1453 | default: | |
fb1fc7ad LR |
1454 | /* |
1455 | * If the regulatory domain being requested by the | |
3e0c3ff3 | 1456 | * driver has already been set just copy it to the |
fb1fc7ad LR |
1457 | * wiphy |
1458 | */ | |
2f92212b JB |
1459 | if (treatment == REG_REQ_ALREADY_SET && |
1460 | pending_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) { | |
458f4f9e | 1461 | regd = reg_copy_regd(get_cfg80211_regdom()); |
e9763c3c | 1462 | if (IS_ERR(regd)) { |
d951c1dd | 1463 | kfree(pending_request); |
2f92212b | 1464 | return REG_REQ_IGNORE; |
d951c1dd | 1465 | } |
2f92212b | 1466 | treatment = REG_REQ_ALREADY_SET; |
458f4f9e | 1467 | rcu_assign_pointer(wiphy->regd, regd); |
3e0c3ff3 LR |
1468 | goto new_request; |
1469 | } | |
d951c1dd | 1470 | kfree(pending_request); |
2f92212b | 1471 | return treatment; |
3e0c3ff3 | 1472 | } |
b2e1b302 | 1473 | |
3e0c3ff3 | 1474 | new_request: |
a042994d LR |
1475 | if (last_request != &core_request_world) |
1476 | kfree(last_request); | |
5203cdb6 | 1477 | |
d951c1dd LR |
1478 | last_request = pending_request; |
1479 | last_request->intersect = intersect; | |
6913b49a | 1480 | last_request->processed = false; |
5203cdb6 | 1481 | |
d951c1dd | 1482 | pending_request = NULL; |
3e0c3ff3 | 1483 | |
09d989d1 LR |
1484 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) { |
1485 | user_alpha2[0] = last_request->alpha2[0]; | |
1486 | user_alpha2[1] = last_request->alpha2[1]; | |
1487 | } | |
1488 | ||
2f92212b JB |
1489 | /* When r == REG_REQ_INTERSECT we do need to call CRDA */ |
1490 | if (treatment != REG_REQ_OK && treatment != REG_REQ_INTERSECT) { | |
73d54c9e LR |
1491 | /* |
1492 | * Since CRDA will not be called in this case as we already | |
1493 | * have applied the requested regulatory domain before we just | |
1494 | * inform userspace we have processed the request | |
1495 | */ | |
2f92212b | 1496 | if (treatment == REG_REQ_ALREADY_SET) { |
73d54c9e | 1497 | nl80211_send_reg_change_event(last_request); |
b2e253cf LR |
1498 | reg_set_request_processed(); |
1499 | } | |
2f92212b | 1500 | return treatment; |
73d54c9e | 1501 | } |
3e0c3ff3 | 1502 | |
2f92212b JB |
1503 | if (call_crda(last_request->alpha2)) |
1504 | return REG_REQ_IGNORE; | |
1505 | return REG_REQ_OK; | |
b2e1b302 LR |
1506 | } |
1507 | ||
30a548c7 | 1508 | /* This processes *all* regulatory hints */ |
8848bef0 LR |
1509 | static void reg_process_hint(struct regulatory_request *reg_request, |
1510 | enum nl80211_reg_initiator reg_initiator) | |
fe33eb39 | 1511 | { |
fe33eb39 LR |
1512 | struct wiphy *wiphy = NULL; |
1513 | ||
fdc9d7b2 JB |
1514 | if (WARN_ON(!reg_request->alpha2)) |
1515 | return; | |
fe33eb39 | 1516 | |
f4173766 | 1517 | if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) |
fe33eb39 LR |
1518 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
1519 | ||
1a919318 | 1520 | if (reg_initiator == NL80211_REGDOM_SET_BY_DRIVER && !wiphy) { |
d951c1dd | 1521 | kfree(reg_request); |
b0e2880b | 1522 | return; |
fe33eb39 LR |
1523 | } |
1524 | ||
2f92212b JB |
1525 | switch (__regulatory_hint(wiphy, reg_request)) { |
1526 | case REG_REQ_ALREADY_SET: | |
1527 | /* This is required so that the orig_* parameters are saved */ | |
1528 | if (wiphy && wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) | |
1529 | wiphy_update_regulatory(wiphy, reg_initiator); | |
1530 | break; | |
1531 | default: | |
1532 | if (reg_initiator == NL80211_REGDOM_SET_BY_USER) | |
1533 | schedule_delayed_work(®_timeout, | |
1534 | msecs_to_jiffies(3142)); | |
1535 | break; | |
a90c7a31 | 1536 | } |
fe33eb39 LR |
1537 | } |
1538 | ||
b2e253cf LR |
1539 | /* |
1540 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
1541 | * Regulatory hints come on a first come first serve basis and we | |
1542 | * must process each one atomically. | |
1543 | */ | |
fe33eb39 | 1544 | static void reg_process_pending_hints(void) |
b0e2880b | 1545 | { |
fe33eb39 | 1546 | struct regulatory_request *reg_request; |
fe33eb39 | 1547 | |
b0e2880b LR |
1548 | mutex_lock(&cfg80211_mutex); |
1549 | mutex_lock(®_mutex); | |
1550 | ||
b2e253cf LR |
1551 | /* When last_request->processed becomes true this will be rescheduled */ |
1552 | if (last_request && !last_request->processed) { | |
1a919318 | 1553 | REG_DBG_PRINT("Pending regulatory request, waiting for it to be processed...\n"); |
b2e253cf LR |
1554 | goto out; |
1555 | } | |
1556 | ||
fe33eb39 | 1557 | spin_lock(®_requests_lock); |
fe33eb39 | 1558 | |
b2e253cf | 1559 | if (list_empty(®_requests_list)) { |
d951c1dd | 1560 | spin_unlock(®_requests_lock); |
b2e253cf | 1561 | goto out; |
fe33eb39 | 1562 | } |
b2e253cf LR |
1563 | |
1564 | reg_request = list_first_entry(®_requests_list, | |
1565 | struct regulatory_request, | |
1566 | list); | |
1567 | list_del_init(®_request->list); | |
1568 | ||
fe33eb39 | 1569 | spin_unlock(®_requests_lock); |
b0e2880b | 1570 | |
8848bef0 | 1571 | reg_process_hint(reg_request, reg_request->initiator); |
b2e253cf LR |
1572 | |
1573 | out: | |
b0e2880b LR |
1574 | mutex_unlock(®_mutex); |
1575 | mutex_unlock(&cfg80211_mutex); | |
fe33eb39 LR |
1576 | } |
1577 | ||
e38f8a7a LR |
1578 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
1579 | static void reg_process_pending_beacon_hints(void) | |
1580 | { | |
79c97e97 | 1581 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
1582 | struct reg_beacon *pending_beacon, *tmp; |
1583 | ||
abc7381b LR |
1584 | /* |
1585 | * No need to hold the reg_mutex here as we just touch wiphys | |
1586 | * and do not read or access regulatory variables. | |
1587 | */ | |
e38f8a7a LR |
1588 | mutex_lock(&cfg80211_mutex); |
1589 | ||
1590 | /* This goes through the _pending_ beacon list */ | |
1591 | spin_lock_bh(®_pending_beacons_lock); | |
1592 | ||
e38f8a7a LR |
1593 | list_for_each_entry_safe(pending_beacon, tmp, |
1594 | ®_pending_beacons, list) { | |
e38f8a7a LR |
1595 | list_del_init(&pending_beacon->list); |
1596 | ||
1597 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
1598 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
1599 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
1600 | |
1601 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
1602 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
1603 | } | |
1604 | ||
1605 | spin_unlock_bh(®_pending_beacons_lock); | |
e38f8a7a LR |
1606 | mutex_unlock(&cfg80211_mutex); |
1607 | } | |
1608 | ||
fe33eb39 LR |
1609 | static void reg_todo(struct work_struct *work) |
1610 | { | |
1611 | reg_process_pending_hints(); | |
e38f8a7a | 1612 | reg_process_pending_beacon_hints(); |
fe33eb39 LR |
1613 | } |
1614 | ||
fe33eb39 LR |
1615 | static void queue_regulatory_request(struct regulatory_request *request) |
1616 | { | |
d4f2c881 JB |
1617 | request->alpha2[0] = toupper(request->alpha2[0]); |
1618 | request->alpha2[1] = toupper(request->alpha2[1]); | |
c61029c7 | 1619 | |
fe33eb39 LR |
1620 | spin_lock(®_requests_lock); |
1621 | list_add_tail(&request->list, ®_requests_list); | |
1622 | spin_unlock(®_requests_lock); | |
1623 | ||
1624 | schedule_work(®_work); | |
1625 | } | |
1626 | ||
09d989d1 LR |
1627 | /* |
1628 | * Core regulatory hint -- happens during cfg80211_init() | |
1629 | * and when we restore regulatory settings. | |
1630 | */ | |
ba25c141 LR |
1631 | static int regulatory_hint_core(const char *alpha2) |
1632 | { | |
1633 | struct regulatory_request *request; | |
1634 | ||
1a919318 | 1635 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
ba25c141 LR |
1636 | if (!request) |
1637 | return -ENOMEM; | |
1638 | ||
1639 | request->alpha2[0] = alpha2[0]; | |
1640 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1641 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 1642 | |
31e99729 | 1643 | queue_regulatory_request(request); |
5078b2e3 | 1644 | |
fe33eb39 | 1645 | return 0; |
ba25c141 LR |
1646 | } |
1647 | ||
fe33eb39 | 1648 | /* User hints */ |
57b5ce07 LR |
1649 | int regulatory_hint_user(const char *alpha2, |
1650 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 1651 | { |
fe33eb39 LR |
1652 | struct regulatory_request *request; |
1653 | ||
fdc9d7b2 JB |
1654 | if (WARN_ON(!alpha2)) |
1655 | return -EINVAL; | |
b2e1b302 | 1656 | |
fe33eb39 LR |
1657 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1658 | if (!request) | |
1659 | return -ENOMEM; | |
1660 | ||
f4173766 | 1661 | request->wiphy_idx = WIPHY_IDX_INVALID; |
fe33eb39 LR |
1662 | request->alpha2[0] = alpha2[0]; |
1663 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 1664 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 1665 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 LR |
1666 | |
1667 | queue_regulatory_request(request); | |
1668 | ||
1669 | return 0; | |
1670 | } | |
1671 | ||
1672 | /* Driver hints */ | |
1673 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
1674 | { | |
1675 | struct regulatory_request *request; | |
1676 | ||
fdc9d7b2 JB |
1677 | if (WARN_ON(!alpha2 || !wiphy)) |
1678 | return -EINVAL; | |
fe33eb39 LR |
1679 | |
1680 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); | |
1681 | if (!request) | |
1682 | return -ENOMEM; | |
1683 | ||
1684 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
1685 | ||
fe33eb39 LR |
1686 | request->alpha2[0] = alpha2[0]; |
1687 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1688 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 LR |
1689 | |
1690 | queue_regulatory_request(request); | |
1691 | ||
1692 | return 0; | |
b2e1b302 LR |
1693 | } |
1694 | EXPORT_SYMBOL(regulatory_hint); | |
1695 | ||
4b44c8bc LR |
1696 | /* |
1697 | * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and | |
1698 | * therefore cannot iterate over the rdev list here. | |
1699 | */ | |
1a919318 JB |
1700 | void regulatory_hint_11d(struct wiphy *wiphy, enum ieee80211_band band, |
1701 | const u8 *country_ie, u8 country_ie_len) | |
3f2355cb | 1702 | { |
3f2355cb | 1703 | char alpha2[2]; |
3f2355cb | 1704 | enum environment_cap env = ENVIRON_ANY; |
fe33eb39 | 1705 | struct regulatory_request *request; |
3f2355cb | 1706 | |
abc7381b | 1707 | mutex_lock(®_mutex); |
3f2355cb | 1708 | |
9828b017 LR |
1709 | if (unlikely(!last_request)) |
1710 | goto out; | |
d335fe63 | 1711 | |
3f2355cb LR |
1712 | /* IE len must be evenly divisible by 2 */ |
1713 | if (country_ie_len & 0x01) | |
1714 | goto out; | |
1715 | ||
1716 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
1717 | goto out; | |
1718 | ||
3f2355cb LR |
1719 | alpha2[0] = country_ie[0]; |
1720 | alpha2[1] = country_ie[1]; | |
1721 | ||
1722 | if (country_ie[2] == 'I') | |
1723 | env = ENVIRON_INDOOR; | |
1724 | else if (country_ie[2] == 'O') | |
1725 | env = ENVIRON_OUTDOOR; | |
1726 | ||
fb1fc7ad | 1727 | /* |
8b19e6ca | 1728 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc LR |
1729 | * We leave conflict resolution to the workqueue, where can hold |
1730 | * cfg80211_mutex. | |
fb1fc7ad | 1731 | */ |
f4173766 JB |
1732 | if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
1733 | last_request->wiphy_idx != WIPHY_IDX_INVALID) | |
4b44c8bc | 1734 | goto out; |
3f2355cb | 1735 | |
fe33eb39 LR |
1736 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1737 | if (!request) | |
f9f9b6e3 | 1738 | goto out; |
fe33eb39 | 1739 | |
fe33eb39 | 1740 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
1741 | request->alpha2[0] = alpha2[0]; |
1742 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1743 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
1744 | request->country_ie_env = env; |
1745 | ||
fe33eb39 | 1746 | queue_regulatory_request(request); |
3f2355cb | 1747 | out: |
abc7381b | 1748 | mutex_unlock(®_mutex); |
3f2355cb | 1749 | } |
b2e1b302 | 1750 | |
09d989d1 LR |
1751 | static void restore_alpha2(char *alpha2, bool reset_user) |
1752 | { | |
1753 | /* indicates there is no alpha2 to consider for restoration */ | |
1754 | alpha2[0] = '9'; | |
1755 | alpha2[1] = '7'; | |
1756 | ||
1757 | /* The user setting has precedence over the module parameter */ | |
1758 | if (is_user_regdom_saved()) { | |
1759 | /* Unless we're asked to ignore it and reset it */ | |
1760 | if (reset_user) { | |
1a919318 | 1761 | REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); |
09d989d1 LR |
1762 | user_alpha2[0] = '9'; |
1763 | user_alpha2[1] = '7'; | |
1764 | ||
1765 | /* | |
1766 | * If we're ignoring user settings, we still need to | |
1767 | * check the module parameter to ensure we put things | |
1768 | * back as they were for a full restore. | |
1769 | */ | |
1770 | if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
1771 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
1772 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
1773 | alpha2[0] = ieee80211_regdom[0]; |
1774 | alpha2[1] = ieee80211_regdom[1]; | |
1775 | } | |
1776 | } else { | |
1a919318 JB |
1777 | REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", |
1778 | user_alpha2[0], user_alpha2[1]); | |
09d989d1 LR |
1779 | alpha2[0] = user_alpha2[0]; |
1780 | alpha2[1] = user_alpha2[1]; | |
1781 | } | |
1782 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
1783 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
1784 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
1785 | alpha2[0] = ieee80211_regdom[0]; |
1786 | alpha2[1] = ieee80211_regdom[1]; | |
1787 | } else | |
d91e41b6 | 1788 | REG_DBG_PRINT("Restoring regulatory settings\n"); |
09d989d1 LR |
1789 | } |
1790 | ||
5ce543d1 RM |
1791 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
1792 | { | |
1793 | struct ieee80211_supported_band *sband; | |
1794 | enum ieee80211_band band; | |
1795 | struct ieee80211_channel *chan; | |
1796 | int i; | |
1797 | ||
1798 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
1799 | sband = wiphy->bands[band]; | |
1800 | if (!sband) | |
1801 | continue; | |
1802 | for (i = 0; i < sband->n_channels; i++) { | |
1803 | chan = &sband->channels[i]; | |
1804 | chan->flags = chan->orig_flags; | |
1805 | chan->max_antenna_gain = chan->orig_mag; | |
1806 | chan->max_power = chan->orig_mpwr; | |
899852af | 1807 | chan->beacon_found = false; |
5ce543d1 RM |
1808 | } |
1809 | } | |
1810 | } | |
1811 | ||
09d989d1 LR |
1812 | /* |
1813 | * Restoring regulatory settings involves ingoring any | |
1814 | * possibly stale country IE information and user regulatory | |
1815 | * settings if so desired, this includes any beacon hints | |
1816 | * learned as we could have traveled outside to another country | |
1817 | * after disconnection. To restore regulatory settings we do | |
1818 | * exactly what we did at bootup: | |
1819 | * | |
1820 | * - send a core regulatory hint | |
1821 | * - send a user regulatory hint if applicable | |
1822 | * | |
1823 | * Device drivers that send a regulatory hint for a specific country | |
1824 | * keep their own regulatory domain on wiphy->regd so that does does | |
1825 | * not need to be remembered. | |
1826 | */ | |
1827 | static void restore_regulatory_settings(bool reset_user) | |
1828 | { | |
1829 | char alpha2[2]; | |
cee0bec5 | 1830 | char world_alpha2[2]; |
09d989d1 | 1831 | struct reg_beacon *reg_beacon, *btmp; |
14609555 LR |
1832 | struct regulatory_request *reg_request, *tmp; |
1833 | LIST_HEAD(tmp_reg_req_list); | |
5ce543d1 | 1834 | struct cfg80211_registered_device *rdev; |
09d989d1 LR |
1835 | |
1836 | mutex_lock(&cfg80211_mutex); | |
1837 | mutex_lock(®_mutex); | |
1838 | ||
379b82f4 | 1839 | reset_regdomains(true, cfg80211_world_regdom); |
09d989d1 LR |
1840 | restore_alpha2(alpha2, reset_user); |
1841 | ||
14609555 LR |
1842 | /* |
1843 | * If there's any pending requests we simply | |
1844 | * stash them to a temporary pending queue and | |
1845 | * add then after we've restored regulatory | |
1846 | * settings. | |
1847 | */ | |
1848 | spin_lock(®_requests_lock); | |
fea9bced JB |
1849 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
1850 | if (reg_request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1851 | continue; | |
1852 | list_move_tail(®_request->list, &tmp_reg_req_list); | |
14609555 LR |
1853 | } |
1854 | spin_unlock(®_requests_lock); | |
1855 | ||
09d989d1 LR |
1856 | /* Clear beacon hints */ |
1857 | spin_lock_bh(®_pending_beacons_lock); | |
fea9bced JB |
1858 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
1859 | list_del(®_beacon->list); | |
1860 | kfree(reg_beacon); | |
09d989d1 LR |
1861 | } |
1862 | spin_unlock_bh(®_pending_beacons_lock); | |
1863 | ||
fea9bced JB |
1864 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
1865 | list_del(®_beacon->list); | |
1866 | kfree(reg_beacon); | |
09d989d1 LR |
1867 | } |
1868 | ||
1869 | /* First restore to the basic regulatory settings */ | |
379b82f4 JB |
1870 | world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; |
1871 | world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; | |
09d989d1 | 1872 | |
5ce543d1 RM |
1873 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1874 | if (rdev->wiphy.flags & WIPHY_FLAG_CUSTOM_REGULATORY) | |
1875 | restore_custom_reg_settings(&rdev->wiphy); | |
1876 | } | |
1877 | ||
cee0bec5 | 1878 | regulatory_hint_core(world_alpha2); |
09d989d1 LR |
1879 | |
1880 | /* | |
1881 | * This restores the ieee80211_regdom module parameter | |
1882 | * preference or the last user requested regulatory | |
1883 | * settings, user regulatory settings takes precedence. | |
1884 | */ | |
1885 | if (is_an_alpha2(alpha2)) | |
57b5ce07 | 1886 | regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); |
09d989d1 | 1887 | |
14609555 | 1888 | spin_lock(®_requests_lock); |
11cff96c | 1889 | list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); |
14609555 LR |
1890 | spin_unlock(®_requests_lock); |
1891 | ||
1892 | mutex_unlock(®_mutex); | |
1893 | mutex_unlock(&cfg80211_mutex); | |
1894 | ||
1895 | REG_DBG_PRINT("Kicking the queue\n"); | |
1896 | ||
1897 | schedule_work(®_work); | |
1898 | } | |
09d989d1 LR |
1899 | |
1900 | void regulatory_hint_disconnect(void) | |
1901 | { | |
1a919318 | 1902 | REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); |
09d989d1 LR |
1903 | restore_regulatory_settings(false); |
1904 | } | |
1905 | ||
e38f8a7a LR |
1906 | static bool freq_is_chan_12_13_14(u16 freq) |
1907 | { | |
59eb21a6 BR |
1908 | if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || |
1909 | freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || | |
1910 | freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) | |
e38f8a7a LR |
1911 | return true; |
1912 | return false; | |
1913 | } | |
1914 | ||
1915 | int regulatory_hint_found_beacon(struct wiphy *wiphy, | |
1916 | struct ieee80211_channel *beacon_chan, | |
1917 | gfp_t gfp) | |
1918 | { | |
1919 | struct reg_beacon *reg_beacon; | |
1920 | ||
1a919318 JB |
1921 | if (beacon_chan->beacon_found || |
1922 | beacon_chan->flags & IEEE80211_CHAN_RADAR || | |
e38f8a7a | 1923 | (beacon_chan->band == IEEE80211_BAND_2GHZ && |
1a919318 | 1924 | !freq_is_chan_12_13_14(beacon_chan->center_freq))) |
e38f8a7a LR |
1925 | return 0; |
1926 | ||
1927 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
1928 | if (!reg_beacon) | |
1929 | return -ENOMEM; | |
1930 | ||
1a919318 | 1931 | REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", |
4113f751 LR |
1932 | beacon_chan->center_freq, |
1933 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
1934 | wiphy_name(wiphy)); | |
1935 | ||
e38f8a7a | 1936 | memcpy(®_beacon->chan, beacon_chan, |
1a919318 | 1937 | sizeof(struct ieee80211_channel)); |
e38f8a7a LR |
1938 | |
1939 | /* | |
1940 | * Since we can be called from BH or and non-BH context | |
1941 | * we must use spin_lock_bh() | |
1942 | */ | |
1943 | spin_lock_bh(®_pending_beacons_lock); | |
1944 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
1945 | spin_unlock_bh(®_pending_beacons_lock); | |
1946 | ||
1947 | schedule_work(®_work); | |
1948 | ||
1949 | return 0; | |
1950 | } | |
1951 | ||
a3d2eaf0 | 1952 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
1953 | { |
1954 | unsigned int i; | |
a3d2eaf0 JB |
1955 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1956 | const struct ieee80211_freq_range *freq_range = NULL; | |
1957 | const struct ieee80211_power_rule *power_rule = NULL; | |
b2e1b302 | 1958 | |
6653325a | 1959 | pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n"); |
b2e1b302 LR |
1960 | |
1961 | for (i = 0; i < rd->n_reg_rules; i++) { | |
1962 | reg_rule = &rd->reg_rules[i]; | |
1963 | freq_range = ®_rule->freq_range; | |
1964 | power_rule = ®_rule->power_rule; | |
1965 | ||
fb1fc7ad LR |
1966 | /* |
1967 | * There may not be documentation for max antenna gain | |
1968 | * in certain regions | |
1969 | */ | |
b2e1b302 | 1970 | if (power_rule->max_antenna_gain) |
6653325a | 1971 | pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n", |
b2e1b302 LR |
1972 | freq_range->start_freq_khz, |
1973 | freq_range->end_freq_khz, | |
1974 | freq_range->max_bandwidth_khz, | |
1975 | power_rule->max_antenna_gain, | |
1976 | power_rule->max_eirp); | |
1977 | else | |
6653325a | 1978 | pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n", |
b2e1b302 LR |
1979 | freq_range->start_freq_khz, |
1980 | freq_range->end_freq_khz, | |
1981 | freq_range->max_bandwidth_khz, | |
1982 | power_rule->max_eirp); | |
1983 | } | |
1984 | } | |
1985 | ||
8b60b078 LR |
1986 | bool reg_supported_dfs_region(u8 dfs_region) |
1987 | { | |
1988 | switch (dfs_region) { | |
1989 | case NL80211_DFS_UNSET: | |
1990 | case NL80211_DFS_FCC: | |
1991 | case NL80211_DFS_ETSI: | |
1992 | case NL80211_DFS_JP: | |
1993 | return true; | |
1994 | default: | |
1995 | REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", | |
1996 | dfs_region); | |
1997 | return false; | |
1998 | } | |
1999 | } | |
2000 | ||
2001 | static void print_dfs_region(u8 dfs_region) | |
2002 | { | |
2003 | if (!dfs_region) | |
2004 | return; | |
2005 | ||
2006 | switch (dfs_region) { | |
2007 | case NL80211_DFS_FCC: | |
2008 | pr_info(" DFS Master region FCC"); | |
2009 | break; | |
2010 | case NL80211_DFS_ETSI: | |
2011 | pr_info(" DFS Master region ETSI"); | |
2012 | break; | |
2013 | case NL80211_DFS_JP: | |
2014 | pr_info(" DFS Master region JP"); | |
2015 | break; | |
2016 | default: | |
1a919318 | 2017 | pr_info(" DFS Master region Unknown"); |
8b60b078 LR |
2018 | break; |
2019 | } | |
2020 | } | |
2021 | ||
a3d2eaf0 | 2022 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
2023 | { |
2024 | ||
3f2355cb | 2025 | if (is_intersected_alpha2(rd->alpha2)) { |
7db90f4a LR |
2026 | if (last_request->initiator == |
2027 | NL80211_REGDOM_SET_BY_COUNTRY_IE) { | |
79c97e97 JB |
2028 | struct cfg80211_registered_device *rdev; |
2029 | rdev = cfg80211_rdev_by_wiphy_idx( | |
806a9e39 | 2030 | last_request->wiphy_idx); |
79c97e97 | 2031 | if (rdev) { |
e9c0268f | 2032 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
2033 | rdev->country_ie_alpha2[0], |
2034 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 2035 | } else |
e9c0268f | 2036 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 2037 | } else |
e9c0268f | 2038 | pr_info("Current regulatory domain intersected:\n"); |
1a919318 | 2039 | } else if (is_world_regdom(rd->alpha2)) { |
e9c0268f | 2040 | pr_info("World regulatory domain updated:\n"); |
1a919318 | 2041 | } else { |
b2e1b302 | 2042 | if (is_unknown_alpha2(rd->alpha2)) |
e9c0268f | 2043 | pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 LR |
2044 | else { |
2045 | if (reg_request_cell_base(last_request)) | |
1a919318 | 2046 | pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", |
57b5ce07 LR |
2047 | rd->alpha2[0], rd->alpha2[1]); |
2048 | else | |
1a919318 | 2049 | pr_info("Regulatory domain changed to country: %c%c\n", |
57b5ce07 LR |
2050 | rd->alpha2[0], rd->alpha2[1]); |
2051 | } | |
b2e1b302 | 2052 | } |
1a919318 | 2053 | |
8b60b078 | 2054 | print_dfs_region(rd->dfs_region); |
b2e1b302 LR |
2055 | print_rd_rules(rd); |
2056 | } | |
2057 | ||
2df78167 | 2058 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2059 | { |
e9c0268f | 2060 | pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
2061 | print_rd_rules(rd); |
2062 | } | |
2063 | ||
d2372b31 | 2064 | /* Takes ownership of rd only if it doesn't fail */ |
a3d2eaf0 | 2065 | static int __set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2066 | { |
e9763c3c | 2067 | const struct ieee80211_regdomain *regd; |
9c96477d | 2068 | const struct ieee80211_regdomain *intersected_rd = NULL; |
806a9e39 | 2069 | struct wiphy *request_wiphy; |
6913b49a | 2070 | |
b2e1b302 LR |
2071 | /* Some basic sanity checks first */ |
2072 | ||
458f4f9e JB |
2073 | assert_reg_lock(); |
2074 | ||
6913b49a JB |
2075 | if (!reg_is_valid_request(rd->alpha2)) |
2076 | return -EINVAL; | |
2077 | ||
b2e1b302 | 2078 | if (is_world_regdom(rd->alpha2)) { |
b2e1b302 LR |
2079 | update_world_regdomain(rd); |
2080 | return 0; | |
2081 | } | |
b2e1b302 LR |
2082 | |
2083 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && | |
1a919318 | 2084 | !is_unknown_alpha2(rd->alpha2)) |
b2e1b302 LR |
2085 | return -EINVAL; |
2086 | ||
fb1fc7ad LR |
2087 | /* |
2088 | * Lets only bother proceeding on the same alpha2 if the current | |
3f2355cb | 2089 | * rd is non static (it means CRDA was present and was used last) |
fb1fc7ad LR |
2090 | * and the pending request came in from a country IE |
2091 | */ | |
7db90f4a | 2092 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
fb1fc7ad LR |
2093 | /* |
2094 | * If someone else asked us to change the rd lets only bother | |
2095 | * checking if the alpha2 changes if CRDA was already called | |
2096 | */ | |
baeb66fe | 2097 | if (!regdom_changes(rd->alpha2)) |
95908535 | 2098 | return -EALREADY; |
3f2355cb LR |
2099 | } |
2100 | ||
fb1fc7ad LR |
2101 | /* |
2102 | * Now lets set the regulatory domain, update all driver channels | |
b2e1b302 LR |
2103 | * and finally inform them of what we have done, in case they want |
2104 | * to review or adjust their own settings based on their own | |
fb1fc7ad LR |
2105 | * internal EEPROM data |
2106 | */ | |
b2e1b302 | 2107 | |
8375af3b | 2108 | if (!is_valid_rd(rd)) { |
e9c0268f | 2109 | pr_err("Invalid regulatory domain detected:\n"); |
8375af3b LR |
2110 | print_regdomain_info(rd); |
2111 | return -EINVAL; | |
b2e1b302 LR |
2112 | } |
2113 | ||
806a9e39 | 2114 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
0bac71af LR |
2115 | if (!request_wiphy && |
2116 | (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
2117 | last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)) { | |
2118 | schedule_delayed_work(®_timeout, 0); | |
de3584bd JB |
2119 | return -ENODEV; |
2120 | } | |
806a9e39 | 2121 | |
b8295acd | 2122 | if (!last_request->intersect) { |
7db90f4a | 2123 | if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) { |
379b82f4 | 2124 | reset_regdomains(false, rd); |
3e0c3ff3 LR |
2125 | return 0; |
2126 | } | |
2127 | ||
fb1fc7ad LR |
2128 | /* |
2129 | * For a driver hint, lets copy the regulatory domain the | |
2130 | * driver wanted to the wiphy to deal with conflicts | |
2131 | */ | |
3e0c3ff3 | 2132 | |
558f6d32 LR |
2133 | /* |
2134 | * Userspace could have sent two replies with only | |
2135 | * one kernel request. | |
2136 | */ | |
2137 | if (request_wiphy->regd) | |
2138 | return -EALREADY; | |
3e0c3ff3 | 2139 | |
e9763c3c JB |
2140 | regd = reg_copy_regd(rd); |
2141 | if (IS_ERR(regd)) | |
2142 | return PTR_ERR(regd); | |
3e0c3ff3 | 2143 | |
458f4f9e | 2144 | rcu_assign_pointer(request_wiphy->regd, regd); |
379b82f4 | 2145 | reset_regdomains(false, rd); |
b8295acd LR |
2146 | return 0; |
2147 | } | |
2148 | ||
2149 | /* Intersection requires a bit more work */ | |
2150 | ||
7db90f4a | 2151 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
458f4f9e | 2152 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); |
9c96477d LR |
2153 | if (!intersected_rd) |
2154 | return -EINVAL; | |
b8295acd | 2155 | |
fb1fc7ad LR |
2156 | /* |
2157 | * We can trash what CRDA provided now. | |
3e0c3ff3 | 2158 | * However if a driver requested this specific regulatory |
fb1fc7ad LR |
2159 | * domain we keep it for its private use |
2160 | */ | |
7db90f4a | 2161 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) |
458f4f9e | 2162 | rcu_assign_pointer(request_wiphy->regd, rd); |
3e0c3ff3 LR |
2163 | else |
2164 | kfree(rd); | |
2165 | ||
b8295acd LR |
2166 | rd = NULL; |
2167 | ||
379b82f4 | 2168 | reset_regdomains(false, intersected_rd); |
b8295acd LR |
2169 | |
2170 | return 0; | |
9c96477d LR |
2171 | } |
2172 | ||
f3baed51 | 2173 | return -EINVAL; |
b2e1b302 LR |
2174 | } |
2175 | ||
2176 | ||
fb1fc7ad LR |
2177 | /* |
2178 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2179 | * multiple drivers can be ironed out later. Caller must've already |
458f4f9e | 2180 | * kmalloc'd the rd structure. |
fb1fc7ad | 2181 | */ |
a3d2eaf0 | 2182 | int set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2183 | { |
b2e1b302 LR |
2184 | int r; |
2185 | ||
abc7381b LR |
2186 | mutex_lock(®_mutex); |
2187 | ||
b2e1b302 LR |
2188 | /* Note that this doesn't update the wiphys, this is done below */ |
2189 | r = __set_regdom(rd); | |
d2372b31 | 2190 | if (r) { |
95908535 KV |
2191 | if (r == -EALREADY) |
2192 | reg_set_request_processed(); | |
2193 | ||
d2372b31 | 2194 | kfree(rd); |
fdc9d7b2 | 2195 | goto out; |
d2372b31 | 2196 | } |
b2e1b302 | 2197 | |
b2e1b302 | 2198 | /* This would make this whole thing pointless */ |
458f4f9e JB |
2199 | if (WARN_ON(!last_request->intersect && |
2200 | rd != get_cfg80211_regdom())) { | |
fdc9d7b2 JB |
2201 | r = -EINVAL; |
2202 | goto out; | |
2203 | } | |
b2e1b302 LR |
2204 | |
2205 | /* update all wiphys now with the new established regulatory domain */ | |
f6037d09 | 2206 | update_all_wiphy_regulatory(last_request->initiator); |
b2e1b302 | 2207 | |
458f4f9e | 2208 | print_regdomain(get_cfg80211_regdom()); |
b2e1b302 | 2209 | |
73d54c9e LR |
2210 | nl80211_send_reg_change_event(last_request); |
2211 | ||
b2e253cf LR |
2212 | reg_set_request_processed(); |
2213 | ||
fdc9d7b2 | 2214 | out: |
abc7381b LR |
2215 | mutex_unlock(®_mutex); |
2216 | ||
b2e1b302 LR |
2217 | return r; |
2218 | } | |
2219 | ||
4d9d88d1 SJR |
2220 | #ifdef CONFIG_HOTPLUG |
2221 | int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) | |
2222 | { | |
2223 | if (last_request && !last_request->processed) { | |
2224 | if (add_uevent_var(env, "COUNTRY=%c%c", | |
2225 | last_request->alpha2[0], | |
2226 | last_request->alpha2[1])) | |
2227 | return -ENOMEM; | |
2228 | } | |
2229 | ||
2230 | return 0; | |
2231 | } | |
2232 | #else | |
2233 | int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) | |
2234 | { | |
2235 | return -ENODEV; | |
2236 | } | |
2237 | #endif /* CONFIG_HOTPLUG */ | |
2238 | ||
57b5ce07 LR |
2239 | void wiphy_regulatory_register(struct wiphy *wiphy) |
2240 | { | |
57b5ce07 LR |
2241 | mutex_lock(®_mutex); |
2242 | ||
2243 | if (!reg_dev_ignore_cell_hint(wiphy)) | |
2244 | reg_num_devs_support_basehint++; | |
2245 | ||
14cdf112 | 2246 | wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE); |
f8a1c774 | 2247 | |
14cdf112 | 2248 | mutex_unlock(®_mutex); |
57b5ce07 LR |
2249 | } |
2250 | ||
a1794390 | 2251 | /* Caller must hold cfg80211_mutex */ |
bfead080 | 2252 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 2253 | { |
0ad8acaf | 2254 | struct wiphy *request_wiphy = NULL; |
806a9e39 | 2255 | |
abc7381b LR |
2256 | mutex_lock(®_mutex); |
2257 | ||
57b5ce07 LR |
2258 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2259 | reg_num_devs_support_basehint--; | |
2260 | ||
458f4f9e JB |
2261 | rcu_free_regdom(get_wiphy_regdom(wiphy)); |
2262 | rcu_assign_pointer(wiphy->regd, NULL); | |
0ef9ccdd | 2263 | |
0ad8acaf LR |
2264 | if (last_request) |
2265 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); | |
806a9e39 | 2266 | |
0ef9ccdd | 2267 | if (!request_wiphy || request_wiphy != wiphy) |
abc7381b | 2268 | goto out; |
0ef9ccdd | 2269 | |
f4173766 | 2270 | last_request->wiphy_idx = WIPHY_IDX_INVALID; |
3f2355cb | 2271 | last_request->country_ie_env = ENVIRON_ANY; |
abc7381b LR |
2272 | out: |
2273 | mutex_unlock(®_mutex); | |
3f2355cb LR |
2274 | } |
2275 | ||
a90c7a31 LR |
2276 | static void reg_timeout_work(struct work_struct *work) |
2277 | { | |
1a919318 | 2278 | REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); |
a90c7a31 LR |
2279 | restore_regulatory_settings(true); |
2280 | } | |
2281 | ||
2fcc9f73 | 2282 | int __init regulatory_init(void) |
b2e1b302 | 2283 | { |
bcf4f99b | 2284 | int err = 0; |
734366de | 2285 | |
b2e1b302 LR |
2286 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
2287 | if (IS_ERR(reg_pdev)) | |
2288 | return PTR_ERR(reg_pdev); | |
734366de | 2289 | |
4d9d88d1 SJR |
2290 | reg_pdev->dev.type = ®_device_type; |
2291 | ||
fe33eb39 | 2292 | spin_lock_init(®_requests_lock); |
e38f8a7a | 2293 | spin_lock_init(®_pending_beacons_lock); |
fe33eb39 | 2294 | |
80007efe LR |
2295 | reg_regdb_size_check(); |
2296 | ||
458f4f9e | 2297 | rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); |
734366de | 2298 | |
09d989d1 LR |
2299 | user_alpha2[0] = '9'; |
2300 | user_alpha2[1] = '7'; | |
2301 | ||
ae9e4b0d | 2302 | /* We always try to get an update for the static regdomain */ |
458f4f9e | 2303 | err = regulatory_hint_core(cfg80211_world_regdom->alpha2); |
ba25c141 | 2304 | if (err) { |
bcf4f99b LR |
2305 | if (err == -ENOMEM) |
2306 | return err; | |
2307 | /* | |
2308 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
2309 | * memory which is handled and propagated appropriately above | |
2310 | * but it can also fail during a netlink_broadcast() or during | |
2311 | * early boot for call_usermodehelper(). For now treat these | |
2312 | * errors as non-fatal. | |
2313 | */ | |
e9c0268f | 2314 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b | 2315 | } |
734366de | 2316 | |
ae9e4b0d LR |
2317 | /* |
2318 | * Finally, if the user set the module parameter treat it | |
2319 | * as a user hint. | |
2320 | */ | |
2321 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
2322 | regulatory_hint_user(ieee80211_regdom, |
2323 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 2324 | |
b2e1b302 LR |
2325 | return 0; |
2326 | } | |
2327 | ||
1a919318 | 2328 | void regulatory_exit(void) |
b2e1b302 | 2329 | { |
fe33eb39 | 2330 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 2331 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
2332 | |
2333 | cancel_work_sync(®_work); | |
a90c7a31 | 2334 | cancel_delayed_work_sync(®_timeout); |
fe33eb39 | 2335 | |
9027b149 | 2336 | /* Lock to suppress warnings */ |
abc7381b | 2337 | mutex_lock(®_mutex); |
379b82f4 | 2338 | reset_regdomains(true, NULL); |
9027b149 | 2339 | mutex_unlock(®_mutex); |
734366de | 2340 | |
58ebacc6 | 2341 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 2342 | |
b2e1b302 | 2343 | platform_device_unregister(reg_pdev); |
734366de | 2344 | |
fea9bced JB |
2345 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2346 | list_del(®_beacon->list); | |
2347 | kfree(reg_beacon); | |
e38f8a7a | 2348 | } |
e38f8a7a | 2349 | |
fea9bced JB |
2350 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2351 | list_del(®_beacon->list); | |
2352 | kfree(reg_beacon); | |
e38f8a7a LR |
2353 | } |
2354 | ||
fea9bced JB |
2355 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2356 | list_del(®_request->list); | |
2357 | kfree(reg_request); | |
fe33eb39 | 2358 | } |
8318d78a | 2359 | } |