Commit | Line | Data |
---|---|---|
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> | |
b2e1b302 | 5 | * Copyright 2008 Luis R. Rodriguez <lrodriguz@atheros.com> |
8318d78a JB |
6 | * |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
b2e1b302 LR |
12 | /** |
13 | * DOC: Wireless regulatory infrastructure | |
8318d78a JB |
14 | * |
15 | * The usual implementation is for a driver to read a device EEPROM to | |
16 | * determine which regulatory domain it should be operating under, then | |
17 | * looking up the allowable channels in a driver-local table and finally | |
18 | * registering those channels in the wiphy structure. | |
19 | * | |
b2e1b302 LR |
20 | * Another set of compliance enforcement is for drivers to use their |
21 | * own compliance limits which can be stored on the EEPROM. The host | |
22 | * driver or firmware may ensure these are used. | |
23 | * | |
24 | * In addition to all this we provide an extra layer of regulatory | |
25 | * conformance. For drivers which do not have any regulatory | |
26 | * information CRDA provides the complete regulatory solution. | |
27 | * For others it provides a community effort on further restrictions | |
28 | * to enhance compliance. | |
29 | * | |
30 | * Note: When number of rules --> infinity we will not be able to | |
31 | * index on alpha2 any more, instead we'll probably have to | |
32 | * rely on some SHA1 checksum of the regdomain for example. | |
33 | * | |
8318d78a JB |
34 | */ |
35 | #include <linux/kernel.h> | |
5a0e3ad6 | 36 | #include <linux/slab.h> |
b2e1b302 LR |
37 | #include <linux/list.h> |
38 | #include <linux/random.h> | |
c61029c7 | 39 | #include <linux/ctype.h> |
b2e1b302 LR |
40 | #include <linux/nl80211.h> |
41 | #include <linux/platform_device.h> | |
b2e1b302 | 42 | #include <net/cfg80211.h> |
8318d78a | 43 | #include "core.h" |
b2e1b302 | 44 | #include "reg.h" |
3b377ea9 | 45 | #include "regdb.h" |
73d54c9e | 46 | #include "nl80211.h" |
8318d78a | 47 | |
4113f751 | 48 | #ifdef CONFIG_CFG80211_REG_DEBUG |
8271195e | 49 | #define REG_DBG_PRINT(format, args...) \ |
4113f751 | 50 | do { \ |
8271195e | 51 | printk(KERN_DEBUG format , ## args); \ |
4113f751 LR |
52 | } while (0) |
53 | #else | |
8271195e | 54 | #define REG_DBG_PRINT(args...) |
4113f751 LR |
55 | #endif |
56 | ||
5166ccd2 | 57 | /* Receipt of information from last regulatory request */ |
f6037d09 | 58 | static struct regulatory_request *last_request; |
734366de | 59 | |
b2e1b302 LR |
60 | /* To trigger userspace events */ |
61 | static struct platform_device *reg_pdev; | |
8318d78a | 62 | |
fb1fc7ad LR |
63 | /* |
64 | * Central wireless core regulatory domains, we only need two, | |
734366de | 65 | * the current one and a world regulatory domain in case we have no |
fb1fc7ad LR |
66 | * information to give us an alpha2 |
67 | */ | |
f130347c | 68 | const struct ieee80211_regdomain *cfg80211_regdomain; |
734366de | 69 | |
abc7381b LR |
70 | /* |
71 | * Protects static reg.c components: | |
72 | * - cfg80211_world_regdom | |
73 | * - cfg80211_regdom | |
abc7381b LR |
74 | * - last_request |
75 | */ | |
670b7f11 | 76 | static DEFINE_MUTEX(reg_mutex); |
abc7381b LR |
77 | #define assert_reg_lock() WARN_ON(!mutex_is_locked(®_mutex)) |
78 | ||
e38f8a7a | 79 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
80 | static LIST_HEAD(reg_requests_list); |
81 | static spinlock_t reg_requests_lock; | |
82 | ||
e38f8a7a LR |
83 | /* Used to queue up beacon hints for review */ |
84 | static LIST_HEAD(reg_pending_beacons); | |
85 | static spinlock_t reg_pending_beacons_lock; | |
86 | ||
87 | /* Used to keep track of processed beacon hints */ | |
88 | static LIST_HEAD(reg_beacon_list); | |
89 | ||
90 | struct reg_beacon { | |
91 | struct list_head list; | |
92 | struct ieee80211_channel chan; | |
93 | }; | |
94 | ||
734366de JB |
95 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
96 | static const struct ieee80211_regdomain world_regdom = { | |
611b6a82 | 97 | .n_reg_rules = 5, |
734366de JB |
98 | .alpha2 = "00", |
99 | .reg_rules = { | |
68798a62 LR |
100 | /* IEEE 802.11b/g, channels 1..11 */ |
101 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
611b6a82 LR |
102 | /* IEEE 802.11b/g, channels 12..13. No HT40 |
103 | * channel fits here. */ | |
104 | REG_RULE(2467-10, 2472+10, 20, 6, 20, | |
3fc71f77 LR |
105 | NL80211_RRF_PASSIVE_SCAN | |
106 | NL80211_RRF_NO_IBSS), | |
611b6a82 LR |
107 | /* IEEE 802.11 channel 14 - Only JP enables |
108 | * this and for 802.11b only */ | |
109 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
110 | NL80211_RRF_PASSIVE_SCAN | | |
111 | NL80211_RRF_NO_IBSS | | |
112 | NL80211_RRF_NO_OFDM), | |
113 | /* IEEE 802.11a, channel 36..48 */ | |
ec329ace | 114 | REG_RULE(5180-10, 5240+10, 40, 6, 20, |
611b6a82 LR |
115 | NL80211_RRF_PASSIVE_SCAN | |
116 | NL80211_RRF_NO_IBSS), | |
3fc71f77 LR |
117 | |
118 | /* NB: 5260 MHz - 5700 MHz requies DFS */ | |
119 | ||
120 | /* IEEE 802.11a, channel 149..165 */ | |
ec329ace | 121 | REG_RULE(5745-10, 5825+10, 40, 6, 20, |
3fc71f77 LR |
122 | NL80211_RRF_PASSIVE_SCAN | |
123 | NL80211_RRF_NO_IBSS), | |
734366de JB |
124 | } |
125 | }; | |
126 | ||
a3d2eaf0 JB |
127 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
128 | &world_regdom; | |
734366de | 129 | |
6ee7d330 | 130 | static char *ieee80211_regdom = "00"; |
09d989d1 | 131 | static char user_alpha2[2]; |
6ee7d330 | 132 | |
734366de JB |
133 | module_param(ieee80211_regdom, charp, 0444); |
134 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
135 | ||
734366de JB |
136 | static void reset_regdomains(void) |
137 | { | |
942b25cf JB |
138 | /* avoid freeing static information or freeing something twice */ |
139 | if (cfg80211_regdomain == cfg80211_world_regdom) | |
140 | cfg80211_regdomain = NULL; | |
141 | if (cfg80211_world_regdom == &world_regdom) | |
142 | cfg80211_world_regdom = NULL; | |
143 | if (cfg80211_regdomain == &world_regdom) | |
144 | cfg80211_regdomain = NULL; | |
942b25cf JB |
145 | |
146 | kfree(cfg80211_regdomain); | |
147 | kfree(cfg80211_world_regdom); | |
734366de | 148 | |
a3d2eaf0 | 149 | cfg80211_world_regdom = &world_regdom; |
734366de JB |
150 | cfg80211_regdomain = NULL; |
151 | } | |
152 | ||
fb1fc7ad LR |
153 | /* |
154 | * Dynamic world regulatory domain requested by the wireless | |
155 | * core upon initialization | |
156 | */ | |
a3d2eaf0 | 157 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 158 | { |
f6037d09 | 159 | BUG_ON(!last_request); |
734366de JB |
160 | |
161 | reset_regdomains(); | |
162 | ||
163 | cfg80211_world_regdom = rd; | |
164 | cfg80211_regdomain = rd; | |
165 | } | |
734366de | 166 | |
a3d2eaf0 | 167 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
168 | { |
169 | if (!alpha2) | |
170 | return false; | |
171 | if (alpha2[0] == '0' && alpha2[1] == '0') | |
172 | return true; | |
173 | return false; | |
174 | } | |
8318d78a | 175 | |
a3d2eaf0 | 176 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
177 | { |
178 | if (!alpha2) | |
179 | return false; | |
180 | if (alpha2[0] != 0 && alpha2[1] != 0) | |
181 | return true; | |
182 | return false; | |
183 | } | |
8318d78a | 184 | |
a3d2eaf0 | 185 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
186 | { |
187 | if (!alpha2) | |
188 | return false; | |
fb1fc7ad LR |
189 | /* |
190 | * Special case where regulatory domain was built by driver | |
191 | * but a specific alpha2 cannot be determined | |
192 | */ | |
b2e1b302 LR |
193 | if (alpha2[0] == '9' && alpha2[1] == '9') |
194 | return true; | |
195 | return false; | |
196 | } | |
8318d78a | 197 | |
3f2355cb LR |
198 | static bool is_intersected_alpha2(const char *alpha2) |
199 | { | |
200 | if (!alpha2) | |
201 | return false; | |
fb1fc7ad LR |
202 | /* |
203 | * Special case where regulatory domain is the | |
3f2355cb | 204 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
205 | * structures |
206 | */ | |
3f2355cb LR |
207 | if (alpha2[0] == '9' && alpha2[1] == '8') |
208 | return true; | |
209 | return false; | |
210 | } | |
211 | ||
a3d2eaf0 | 212 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
213 | { |
214 | if (!alpha2) | |
215 | return false; | |
c61029c7 | 216 | if (isalpha(alpha2[0]) && isalpha(alpha2[1])) |
b2e1b302 LR |
217 | return true; |
218 | return false; | |
219 | } | |
8318d78a | 220 | |
a3d2eaf0 | 221 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
222 | { |
223 | if (!alpha2_x || !alpha2_y) | |
224 | return false; | |
225 | if (alpha2_x[0] == alpha2_y[0] && | |
226 | alpha2_x[1] == alpha2_y[1]) | |
227 | return true; | |
228 | return false; | |
229 | } | |
230 | ||
69b1572b | 231 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 232 | { |
761cf7ec LR |
233 | assert_cfg80211_lock(); |
234 | ||
b2e1b302 LR |
235 | if (!cfg80211_regdomain) |
236 | return true; | |
237 | if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) | |
238 | return false; | |
239 | return true; | |
240 | } | |
241 | ||
09d989d1 LR |
242 | /* |
243 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
244 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
245 | * has ever been issued. | |
246 | */ | |
247 | static bool is_user_regdom_saved(void) | |
248 | { | |
249 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
250 | return false; | |
251 | ||
252 | /* This would indicate a mistake on the design */ | |
253 | if (WARN((!is_world_regdom(user_alpha2) && | |
254 | !is_an_alpha2(user_alpha2)), | |
255 | "Unexpected user alpha2: %c%c\n", | |
256 | user_alpha2[0], | |
257 | user_alpha2[1])) | |
258 | return false; | |
259 | ||
260 | return true; | |
261 | } | |
262 | ||
3b377ea9 JL |
263 | static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd, |
264 | const struct ieee80211_regdomain *src_regd) | |
265 | { | |
266 | struct ieee80211_regdomain *regd; | |
267 | int size_of_regd = 0; | |
268 | unsigned int i; | |
269 | ||
270 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
271 | ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule)); | |
272 | ||
273 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
274 | if (!regd) | |
275 | return -ENOMEM; | |
276 | ||
277 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
278 | ||
279 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
280 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
281 | sizeof(struct ieee80211_reg_rule)); | |
282 | ||
283 | *dst_regd = regd; | |
284 | return 0; | |
285 | } | |
286 | ||
287 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB | |
288 | struct reg_regdb_search_request { | |
289 | char alpha2[2]; | |
290 | struct list_head list; | |
291 | }; | |
292 | ||
293 | static LIST_HEAD(reg_regdb_search_list); | |
368d06f5 | 294 | static DEFINE_MUTEX(reg_regdb_search_mutex); |
3b377ea9 JL |
295 | |
296 | static void reg_regdb_search(struct work_struct *work) | |
297 | { | |
298 | struct reg_regdb_search_request *request; | |
299 | const struct ieee80211_regdomain *curdom, *regdom; | |
300 | int i, r; | |
301 | ||
368d06f5 | 302 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 JL |
303 | while (!list_empty(®_regdb_search_list)) { |
304 | request = list_first_entry(®_regdb_search_list, | |
305 | struct reg_regdb_search_request, | |
306 | list); | |
307 | list_del(&request->list); | |
308 | ||
309 | for (i=0; i<reg_regdb_size; i++) { | |
310 | curdom = reg_regdb[i]; | |
311 | ||
312 | if (!memcmp(request->alpha2, curdom->alpha2, 2)) { | |
313 | r = reg_copy_regd(®dom, curdom); | |
314 | if (r) | |
315 | break; | |
3b377ea9 JL |
316 | mutex_lock(&cfg80211_mutex); |
317 | set_regdom(regdom); | |
318 | mutex_unlock(&cfg80211_mutex); | |
3b377ea9 JL |
319 | break; |
320 | } | |
321 | } | |
322 | ||
323 | kfree(request); | |
324 | } | |
368d06f5 | 325 | mutex_unlock(®_regdb_search_mutex); |
3b377ea9 JL |
326 | } |
327 | ||
328 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); | |
329 | ||
330 | static void reg_regdb_query(const char *alpha2) | |
331 | { | |
332 | struct reg_regdb_search_request *request; | |
333 | ||
334 | if (!alpha2) | |
335 | return; | |
336 | ||
337 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); | |
338 | if (!request) | |
339 | return; | |
340 | ||
341 | memcpy(request->alpha2, alpha2, 2); | |
342 | ||
368d06f5 | 343 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 | 344 | list_add_tail(&request->list, ®_regdb_search_list); |
368d06f5 | 345 | mutex_unlock(®_regdb_search_mutex); |
3b377ea9 JL |
346 | |
347 | schedule_work(®_regdb_work); | |
348 | } | |
349 | #else | |
350 | static inline void reg_regdb_query(const char *alpha2) {} | |
351 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ | |
352 | ||
fb1fc7ad LR |
353 | /* |
354 | * This lets us keep regulatory code which is updated on a regulatory | |
355 | * basis in userspace. | |
356 | */ | |
b2e1b302 LR |
357 | static int call_crda(const char *alpha2) |
358 | { | |
359 | char country_env[9 + 2] = "COUNTRY="; | |
360 | char *envp[] = { | |
361 | country_env, | |
362 | NULL | |
363 | }; | |
364 | ||
365 | if (!is_world_regdom((char *) alpha2)) | |
366 | printk(KERN_INFO "cfg80211: Calling CRDA for country: %c%c\n", | |
367 | alpha2[0], alpha2[1]); | |
368 | else | |
b2e1b302 LR |
369 | printk(KERN_INFO "cfg80211: Calling CRDA to update world " |
370 | "regulatory domain\n"); | |
b2e1b302 | 371 | |
3b377ea9 JL |
372 | /* query internal regulatory database (if it exists) */ |
373 | reg_regdb_query(alpha2); | |
374 | ||
b2e1b302 LR |
375 | country_env[8] = alpha2[0]; |
376 | country_env[9] = alpha2[1]; | |
377 | ||
378 | return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, envp); | |
379 | } | |
380 | ||
b2e1b302 | 381 | /* Used by nl80211 before kmalloc'ing our regulatory domain */ |
a3d2eaf0 | 382 | bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 383 | { |
61405e97 LR |
384 | assert_cfg80211_lock(); |
385 | ||
f6037d09 JB |
386 | if (!last_request) |
387 | return false; | |
388 | ||
389 | return alpha2_equal(last_request->alpha2, alpha2); | |
b2e1b302 | 390 | } |
8318d78a | 391 | |
b2e1b302 | 392 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 393 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 394 | { |
a3d2eaf0 | 395 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
396 | u32 freq_diff; |
397 | ||
91e99004 | 398 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
399 | return false; |
400 | ||
401 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
402 | return false; | |
403 | ||
404 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
405 | ||
bd05f28e RK |
406 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
407 | freq_range->max_bandwidth_khz > freq_diff) | |
b2e1b302 LR |
408 | return false; |
409 | ||
410 | return true; | |
411 | } | |
412 | ||
a3d2eaf0 | 413 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 414 | { |
a3d2eaf0 | 415 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 416 | unsigned int i; |
8318d78a | 417 | |
b2e1b302 LR |
418 | if (!rd->n_reg_rules) |
419 | return false; | |
8318d78a | 420 | |
88dc1c3f LR |
421 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
422 | return false; | |
423 | ||
b2e1b302 LR |
424 | for (i = 0; i < rd->n_reg_rules; i++) { |
425 | reg_rule = &rd->reg_rules[i]; | |
426 | if (!is_valid_reg_rule(reg_rule)) | |
427 | return false; | |
428 | } | |
429 | ||
430 | return true; | |
8318d78a JB |
431 | } |
432 | ||
038659e7 LR |
433 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
434 | u32 center_freq_khz, | |
435 | u32 bw_khz) | |
b2e1b302 | 436 | { |
038659e7 LR |
437 | u32 start_freq_khz, end_freq_khz; |
438 | ||
439 | start_freq_khz = center_freq_khz - (bw_khz/2); | |
440 | end_freq_khz = center_freq_khz + (bw_khz/2); | |
441 | ||
442 | if (start_freq_khz >= freq_range->start_freq_khz && | |
443 | end_freq_khz <= freq_range->end_freq_khz) | |
444 | return true; | |
445 | ||
446 | return false; | |
b2e1b302 | 447 | } |
8318d78a | 448 | |
0c7dc45d LR |
449 | /** |
450 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
451 | * @freq_range: frequency rule we want to query | |
452 | * @freq_khz: frequency we are inquiring about | |
453 | * | |
454 | * This lets us know if a specific frequency rule is or is not relevant to | |
455 | * a specific frequency's band. Bands are device specific and artificial | |
456 | * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is | |
457 | * safe for now to assume that a frequency rule should not be part of a | |
458 | * frequency's band if the start freq or end freq are off by more than 2 GHz. | |
459 | * This resolution can be lowered and should be considered as we add | |
460 | * regulatory rule support for other "bands". | |
461 | **/ | |
462 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
463 | u32 freq_khz) | |
464 | { | |
465 | #define ONE_GHZ_IN_KHZ 1000000 | |
466 | if (abs(freq_khz - freq_range->start_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) | |
467 | return true; | |
468 | if (abs(freq_khz - freq_range->end_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) | |
469 | return true; | |
470 | return false; | |
471 | #undef ONE_GHZ_IN_KHZ | |
472 | } | |
473 | ||
fb1fc7ad LR |
474 | /* |
475 | * Helper for regdom_intersect(), this does the real | |
476 | * mathematical intersection fun | |
477 | */ | |
9c96477d LR |
478 | static int reg_rules_intersect( |
479 | const struct ieee80211_reg_rule *rule1, | |
480 | const struct ieee80211_reg_rule *rule2, | |
481 | struct ieee80211_reg_rule *intersected_rule) | |
482 | { | |
483 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
484 | struct ieee80211_freq_range *freq_range; | |
485 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
486 | struct ieee80211_power_rule *power_rule; | |
487 | u32 freq_diff; | |
488 | ||
489 | freq_range1 = &rule1->freq_range; | |
490 | freq_range2 = &rule2->freq_range; | |
491 | freq_range = &intersected_rule->freq_range; | |
492 | ||
493 | power_rule1 = &rule1->power_rule; | |
494 | power_rule2 = &rule2->power_rule; | |
495 | power_rule = &intersected_rule->power_rule; | |
496 | ||
497 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
498 | freq_range2->start_freq_khz); | |
499 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, | |
500 | freq_range2->end_freq_khz); | |
501 | freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, | |
502 | freq_range2->max_bandwidth_khz); | |
503 | ||
504 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
505 | if (freq_range->max_bandwidth_khz > freq_diff) | |
506 | freq_range->max_bandwidth_khz = freq_diff; | |
507 | ||
508 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
509 | power_rule2->max_eirp); | |
510 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
511 | power_rule2->max_antenna_gain); | |
512 | ||
513 | intersected_rule->flags = (rule1->flags | rule2->flags); | |
514 | ||
515 | if (!is_valid_reg_rule(intersected_rule)) | |
516 | return -EINVAL; | |
517 | ||
518 | return 0; | |
519 | } | |
520 | ||
521 | /** | |
522 | * regdom_intersect - do the intersection between two regulatory domains | |
523 | * @rd1: first regulatory domain | |
524 | * @rd2: second regulatory domain | |
525 | * | |
526 | * Use this function to get the intersection between two regulatory domains. | |
527 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
528 | * as no one single alpha2 can represent this regulatory domain. | |
529 | * | |
530 | * Returns a pointer to the regulatory domain structure which will hold the | |
531 | * resulting intersection of rules between rd1 and rd2. We will | |
532 | * kzalloc() this structure for you. | |
533 | */ | |
534 | static struct ieee80211_regdomain *regdom_intersect( | |
535 | const struct ieee80211_regdomain *rd1, | |
536 | const struct ieee80211_regdomain *rd2) | |
537 | { | |
538 | int r, size_of_regd; | |
539 | unsigned int x, y; | |
540 | unsigned int num_rules = 0, rule_idx = 0; | |
541 | const struct ieee80211_reg_rule *rule1, *rule2; | |
542 | struct ieee80211_reg_rule *intersected_rule; | |
543 | struct ieee80211_regdomain *rd; | |
544 | /* This is just a dummy holder to help us count */ | |
545 | struct ieee80211_reg_rule irule; | |
546 | ||
547 | /* Uses the stack temporarily for counter arithmetic */ | |
548 | intersected_rule = &irule; | |
549 | ||
550 | memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); | |
551 | ||
552 | if (!rd1 || !rd2) | |
553 | return NULL; | |
554 | ||
fb1fc7ad LR |
555 | /* |
556 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
557 | * build them. This is to so we can malloc() and free() a |
558 | * regdomain once. The reason we use reg_rules_intersect() here | |
559 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
560 | * All rules that do check out OK are valid. |
561 | */ | |
9c96477d LR |
562 | |
563 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
564 | rule1 = &rd1->reg_rules[x]; | |
565 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
566 | rule2 = &rd2->reg_rules[y]; | |
567 | if (!reg_rules_intersect(rule1, rule2, | |
568 | intersected_rule)) | |
569 | num_rules++; | |
570 | memset(intersected_rule, 0, | |
571 | sizeof(struct ieee80211_reg_rule)); | |
572 | } | |
573 | } | |
574 | ||
575 | if (!num_rules) | |
576 | return NULL; | |
577 | ||
578 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
579 | ((num_rules + 1) * sizeof(struct ieee80211_reg_rule)); | |
580 | ||
581 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
582 | if (!rd) | |
583 | return NULL; | |
584 | ||
585 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
586 | rule1 = &rd1->reg_rules[x]; | |
587 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
588 | rule2 = &rd2->reg_rules[y]; | |
fb1fc7ad LR |
589 | /* |
590 | * This time around instead of using the stack lets | |
9c96477d | 591 | * write to the target rule directly saving ourselves |
fb1fc7ad LR |
592 | * a memcpy() |
593 | */ | |
9c96477d LR |
594 | intersected_rule = &rd->reg_rules[rule_idx]; |
595 | r = reg_rules_intersect(rule1, rule2, | |
596 | intersected_rule); | |
fb1fc7ad LR |
597 | /* |
598 | * No need to memset here the intersected rule here as | |
599 | * we're not using the stack anymore | |
600 | */ | |
9c96477d LR |
601 | if (r) |
602 | continue; | |
603 | rule_idx++; | |
604 | } | |
605 | } | |
606 | ||
607 | if (rule_idx != num_rules) { | |
608 | kfree(rd); | |
609 | return NULL; | |
610 | } | |
611 | ||
612 | rd->n_reg_rules = num_rules; | |
613 | rd->alpha2[0] = '9'; | |
614 | rd->alpha2[1] = '8'; | |
615 | ||
616 | return rd; | |
617 | } | |
618 | ||
fb1fc7ad LR |
619 | /* |
620 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
621 | * want to just have the channel structure use these | |
622 | */ | |
b2e1b302 LR |
623 | static u32 map_regdom_flags(u32 rd_flags) |
624 | { | |
625 | u32 channel_flags = 0; | |
626 | if (rd_flags & NL80211_RRF_PASSIVE_SCAN) | |
627 | channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; | |
628 | if (rd_flags & NL80211_RRF_NO_IBSS) | |
629 | channel_flags |= IEEE80211_CHAN_NO_IBSS; | |
630 | if (rd_flags & NL80211_RRF_DFS) | |
631 | channel_flags |= IEEE80211_CHAN_RADAR; | |
632 | return channel_flags; | |
633 | } | |
634 | ||
1fa25e41 LR |
635 | static int freq_reg_info_regd(struct wiphy *wiphy, |
636 | u32 center_freq, | |
038659e7 | 637 | u32 desired_bw_khz, |
1fa25e41 LR |
638 | const struct ieee80211_reg_rule **reg_rule, |
639 | const struct ieee80211_regdomain *custom_regd) | |
8318d78a JB |
640 | { |
641 | int i; | |
0c7dc45d | 642 | bool band_rule_found = false; |
3e0c3ff3 | 643 | const struct ieee80211_regdomain *regd; |
038659e7 LR |
644 | bool bw_fits = false; |
645 | ||
646 | if (!desired_bw_khz) | |
647 | desired_bw_khz = MHZ_TO_KHZ(20); | |
8318d78a | 648 | |
1fa25e41 | 649 | regd = custom_regd ? custom_regd : cfg80211_regdomain; |
3e0c3ff3 | 650 | |
fb1fc7ad LR |
651 | /* |
652 | * Follow the driver's regulatory domain, if present, unless a country | |
653 | * IE has been processed or a user wants to help complaince further | |
654 | */ | |
7db90f4a LR |
655 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
656 | last_request->initiator != NL80211_REGDOM_SET_BY_USER && | |
3e0c3ff3 LR |
657 | wiphy->regd) |
658 | regd = wiphy->regd; | |
659 | ||
660 | if (!regd) | |
b2e1b302 LR |
661 | return -EINVAL; |
662 | ||
3e0c3ff3 | 663 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
664 | const struct ieee80211_reg_rule *rr; |
665 | const struct ieee80211_freq_range *fr = NULL; | |
666 | const struct ieee80211_power_rule *pr = NULL; | |
667 | ||
3e0c3ff3 | 668 | rr = ®d->reg_rules[i]; |
b2e1b302 LR |
669 | fr = &rr->freq_range; |
670 | pr = &rr->power_rule; | |
0c7dc45d | 671 | |
fb1fc7ad LR |
672 | /* |
673 | * We only need to know if one frequency rule was | |
0c7dc45d | 674 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
675 | * not overwrite it once found |
676 | */ | |
0c7dc45d LR |
677 | if (!band_rule_found) |
678 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
679 | ||
038659e7 LR |
680 | bw_fits = reg_does_bw_fit(fr, |
681 | center_freq, | |
682 | desired_bw_khz); | |
0c7dc45d | 683 | |
038659e7 | 684 | if (band_rule_found && bw_fits) { |
b2e1b302 | 685 | *reg_rule = rr; |
038659e7 | 686 | return 0; |
8318d78a JB |
687 | } |
688 | } | |
689 | ||
0c7dc45d LR |
690 | if (!band_rule_found) |
691 | return -ERANGE; | |
692 | ||
038659e7 | 693 | return -EINVAL; |
b2e1b302 LR |
694 | } |
695 | ||
038659e7 LR |
696 | int freq_reg_info(struct wiphy *wiphy, |
697 | u32 center_freq, | |
698 | u32 desired_bw_khz, | |
699 | const struct ieee80211_reg_rule **reg_rule) | |
1fa25e41 | 700 | { |
ac46d48e | 701 | assert_cfg80211_lock(); |
038659e7 LR |
702 | return freq_reg_info_regd(wiphy, |
703 | center_freq, | |
704 | desired_bw_khz, | |
705 | reg_rule, | |
706 | NULL); | |
1fa25e41 | 707 | } |
4f366c5d | 708 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 709 | |
038659e7 LR |
710 | /* |
711 | * Note that right now we assume the desired channel bandwidth | |
712 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
713 | * per channel, the primary and the extension channel). To support | |
714 | * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a | |
715 | * new ieee80211_channel.target_bw and re run the regulatory check | |
716 | * on the wiphy with the target_bw specified. Then we can simply use | |
717 | * that below for the desired_bw_khz below. | |
718 | */ | |
a92a3ce7 LR |
719 | static void handle_channel(struct wiphy *wiphy, enum ieee80211_band band, |
720 | unsigned int chan_idx) | |
b2e1b302 LR |
721 | { |
722 | int r; | |
038659e7 LR |
723 | u32 flags, bw_flags = 0; |
724 | u32 desired_bw_khz = MHZ_TO_KHZ(20); | |
b2e1b302 LR |
725 | const struct ieee80211_reg_rule *reg_rule = NULL; |
726 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 727 | const struct ieee80211_freq_range *freq_range = NULL; |
a92a3ce7 LR |
728 | struct ieee80211_supported_band *sband; |
729 | struct ieee80211_channel *chan; | |
fe33eb39 | 730 | struct wiphy *request_wiphy = NULL; |
a92a3ce7 | 731 | |
761cf7ec LR |
732 | assert_cfg80211_lock(); |
733 | ||
806a9e39 LR |
734 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
735 | ||
a92a3ce7 LR |
736 | sband = wiphy->bands[band]; |
737 | BUG_ON(chan_idx >= sband->n_channels); | |
738 | chan = &sband->channels[chan_idx]; | |
739 | ||
740 | flags = chan->orig_flags; | |
b2e1b302 | 741 | |
038659e7 LR |
742 | r = freq_reg_info(wiphy, |
743 | MHZ_TO_KHZ(chan->center_freq), | |
744 | desired_bw_khz, | |
745 | ®_rule); | |
b2e1b302 | 746 | |
4f366c5d | 747 | if (r) |
8318d78a | 748 | return; |
8318d78a | 749 | |
b2e1b302 | 750 | power_rule = ®_rule->power_rule; |
038659e7 LR |
751 | freq_range = ®_rule->freq_range; |
752 | ||
753 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
754 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
b2e1b302 | 755 | |
7db90f4a | 756 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 757 | request_wiphy && request_wiphy == wiphy && |
5be83de5 | 758 | request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { |
fb1fc7ad LR |
759 | /* |
760 | * This gaurantees the driver's requested regulatory domain | |
f976376d | 761 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
762 | * settings |
763 | */ | |
f976376d | 764 | chan->flags = chan->orig_flags = |
038659e7 | 765 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
766 | chan->max_antenna_gain = chan->orig_mag = |
767 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
f976376d LR |
768 | chan->max_power = chan->orig_mpwr = |
769 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
770 | return; | |
771 | } | |
772 | ||
038659e7 | 773 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
8318d78a | 774 | chan->max_antenna_gain = min(chan->orig_mag, |
b2e1b302 | 775 | (int) MBI_TO_DBI(power_rule->max_antenna_gain)); |
253898c4 | 776 | if (chan->orig_mpwr) |
b2e1b302 LR |
777 | chan->max_power = min(chan->orig_mpwr, |
778 | (int) MBM_TO_DBM(power_rule->max_eirp)); | |
253898c4 | 779 | else |
b2e1b302 | 780 | chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
8318d78a JB |
781 | } |
782 | ||
a92a3ce7 | 783 | static void handle_band(struct wiphy *wiphy, enum ieee80211_band band) |
8318d78a | 784 | { |
a92a3ce7 LR |
785 | unsigned int i; |
786 | struct ieee80211_supported_band *sband; | |
787 | ||
788 | BUG_ON(!wiphy->bands[band]); | |
789 | sband = wiphy->bands[band]; | |
8318d78a JB |
790 | |
791 | for (i = 0; i < sband->n_channels; i++) | |
a92a3ce7 | 792 | handle_channel(wiphy, band, i); |
8318d78a JB |
793 | } |
794 | ||
7db90f4a LR |
795 | static bool ignore_reg_update(struct wiphy *wiphy, |
796 | enum nl80211_reg_initiator initiator) | |
14b9815a LR |
797 | { |
798 | if (!last_request) | |
799 | return true; | |
7db90f4a | 800 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
5be83de5 | 801 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) |
14b9815a | 802 | return true; |
fb1fc7ad LR |
803 | /* |
804 | * wiphy->regd will be set once the device has its own | |
805 | * desired regulatory domain set | |
806 | */ | |
5be83de5 | 807 | if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd && |
f976376d | 808 | !is_world_regdom(last_request->alpha2)) |
14b9815a LR |
809 | return true; |
810 | return false; | |
811 | } | |
812 | ||
7db90f4a | 813 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
8318d78a | 814 | { |
79c97e97 | 815 | struct cfg80211_registered_device *rdev; |
8318d78a | 816 | |
79c97e97 JB |
817 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
818 | wiphy_update_regulatory(&rdev->wiphy, initiator); | |
b2e1b302 LR |
819 | } |
820 | ||
e38f8a7a LR |
821 | static void handle_reg_beacon(struct wiphy *wiphy, |
822 | unsigned int chan_idx, | |
823 | struct reg_beacon *reg_beacon) | |
824 | { | |
e38f8a7a LR |
825 | struct ieee80211_supported_band *sband; |
826 | struct ieee80211_channel *chan; | |
6bad8766 LR |
827 | bool channel_changed = false; |
828 | struct ieee80211_channel chan_before; | |
e38f8a7a LR |
829 | |
830 | assert_cfg80211_lock(); | |
831 | ||
832 | sband = wiphy->bands[reg_beacon->chan.band]; | |
833 | chan = &sband->channels[chan_idx]; | |
834 | ||
835 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
836 | return; | |
837 | ||
6bad8766 LR |
838 | if (chan->beacon_found) |
839 | return; | |
840 | ||
841 | chan->beacon_found = true; | |
842 | ||
5be83de5 | 843 | if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) |
37184244 LR |
844 | return; |
845 | ||
6bad8766 LR |
846 | chan_before.center_freq = chan->center_freq; |
847 | chan_before.flags = chan->flags; | |
848 | ||
37184244 | 849 | if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { |
e38f8a7a | 850 | chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; |
6bad8766 | 851 | channel_changed = true; |
e38f8a7a LR |
852 | } |
853 | ||
37184244 | 854 | if (chan->flags & IEEE80211_CHAN_NO_IBSS) { |
e38f8a7a | 855 | chan->flags &= ~IEEE80211_CHAN_NO_IBSS; |
6bad8766 | 856 | channel_changed = true; |
e38f8a7a LR |
857 | } |
858 | ||
6bad8766 LR |
859 | if (channel_changed) |
860 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
861 | } |
862 | ||
863 | /* | |
864 | * Called when a scan on a wiphy finds a beacon on | |
865 | * new channel | |
866 | */ | |
867 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
868 | struct reg_beacon *reg_beacon) | |
869 | { | |
870 | unsigned int i; | |
871 | struct ieee80211_supported_band *sband; | |
872 | ||
873 | assert_cfg80211_lock(); | |
874 | ||
875 | if (!wiphy->bands[reg_beacon->chan.band]) | |
876 | return; | |
877 | ||
878 | sband = wiphy->bands[reg_beacon->chan.band]; | |
879 | ||
880 | for (i = 0; i < sband->n_channels; i++) | |
881 | handle_reg_beacon(wiphy, i, reg_beacon); | |
882 | } | |
883 | ||
884 | /* | |
885 | * Called upon reg changes or a new wiphy is added | |
886 | */ | |
887 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
888 | { | |
889 | unsigned int i; | |
890 | struct ieee80211_supported_band *sband; | |
891 | struct reg_beacon *reg_beacon; | |
892 | ||
893 | assert_cfg80211_lock(); | |
894 | ||
895 | if (list_empty(®_beacon_list)) | |
896 | return; | |
897 | ||
898 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { | |
899 | if (!wiphy->bands[reg_beacon->chan.band]) | |
900 | continue; | |
901 | sband = wiphy->bands[reg_beacon->chan.band]; | |
902 | for (i = 0; i < sband->n_channels; i++) | |
903 | handle_reg_beacon(wiphy, i, reg_beacon); | |
904 | } | |
905 | } | |
906 | ||
907 | static bool reg_is_world_roaming(struct wiphy *wiphy) | |
908 | { | |
909 | if (is_world_regdom(cfg80211_regdomain->alpha2) || | |
910 | (wiphy->regd && is_world_regdom(wiphy->regd->alpha2))) | |
911 | return true; | |
b1ed8ddd LR |
912 | if (last_request && |
913 | last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
5be83de5 | 914 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) |
e38f8a7a LR |
915 | return true; |
916 | return false; | |
917 | } | |
918 | ||
919 | /* Reap the advantages of previously found beacons */ | |
920 | static void reg_process_beacons(struct wiphy *wiphy) | |
921 | { | |
b1ed8ddd LR |
922 | /* |
923 | * Means we are just firing up cfg80211, so no beacons would | |
924 | * have been processed yet. | |
925 | */ | |
926 | if (!last_request) | |
927 | return; | |
e38f8a7a LR |
928 | if (!reg_is_world_roaming(wiphy)) |
929 | return; | |
930 | wiphy_update_beacon_reg(wiphy); | |
931 | } | |
932 | ||
038659e7 LR |
933 | static bool is_ht40_not_allowed(struct ieee80211_channel *chan) |
934 | { | |
935 | if (!chan) | |
936 | return true; | |
937 | if (chan->flags & IEEE80211_CHAN_DISABLED) | |
938 | return true; | |
939 | /* This would happen when regulatory rules disallow HT40 completely */ | |
940 | if (IEEE80211_CHAN_NO_HT40 == (chan->flags & (IEEE80211_CHAN_NO_HT40))) | |
941 | return true; | |
942 | return false; | |
943 | } | |
944 | ||
945 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
946 | enum ieee80211_band band, | |
947 | unsigned int chan_idx) | |
948 | { | |
949 | struct ieee80211_supported_band *sband; | |
950 | struct ieee80211_channel *channel; | |
951 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; | |
952 | unsigned int i; | |
953 | ||
954 | assert_cfg80211_lock(); | |
955 | ||
956 | sband = wiphy->bands[band]; | |
957 | BUG_ON(chan_idx >= sband->n_channels); | |
958 | channel = &sband->channels[chan_idx]; | |
959 | ||
960 | if (is_ht40_not_allowed(channel)) { | |
961 | channel->flags |= IEEE80211_CHAN_NO_HT40; | |
962 | return; | |
963 | } | |
964 | ||
965 | /* | |
966 | * We need to ensure the extension channels exist to | |
967 | * be able to use HT40- or HT40+, this finds them (or not) | |
968 | */ | |
969 | for (i = 0; i < sband->n_channels; i++) { | |
970 | struct ieee80211_channel *c = &sband->channels[i]; | |
971 | if (c->center_freq == (channel->center_freq - 20)) | |
972 | channel_before = c; | |
973 | if (c->center_freq == (channel->center_freq + 20)) | |
974 | channel_after = c; | |
975 | } | |
976 | ||
977 | /* | |
978 | * Please note that this assumes target bandwidth is 20 MHz, | |
979 | * if that ever changes we also need to change the below logic | |
980 | * to include that as well. | |
981 | */ | |
982 | if (is_ht40_not_allowed(channel_before)) | |
689da1b3 | 983 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 984 | else |
689da1b3 | 985 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 LR |
986 | |
987 | if (is_ht40_not_allowed(channel_after)) | |
689da1b3 | 988 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 989 | else |
689da1b3 | 990 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
991 | } |
992 | ||
993 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
994 | enum ieee80211_band band) | |
995 | { | |
996 | unsigned int i; | |
997 | struct ieee80211_supported_band *sband; | |
998 | ||
999 | BUG_ON(!wiphy->bands[band]); | |
1000 | sband = wiphy->bands[band]; | |
1001 | ||
1002 | for (i = 0; i < sband->n_channels; i++) | |
1003 | reg_process_ht_flags_channel(wiphy, band, i); | |
1004 | } | |
1005 | ||
1006 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1007 | { | |
1008 | enum ieee80211_band band; | |
1009 | ||
1010 | if (!wiphy) | |
1011 | return; | |
1012 | ||
1013 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
1014 | if (wiphy->bands[band]) | |
1015 | reg_process_ht_flags_band(wiphy, band); | |
1016 | } | |
1017 | ||
1018 | } | |
1019 | ||
7db90f4a LR |
1020 | void wiphy_update_regulatory(struct wiphy *wiphy, |
1021 | enum nl80211_reg_initiator initiator) | |
b2e1b302 LR |
1022 | { |
1023 | enum ieee80211_band band; | |
d46e5b1d | 1024 | |
7db90f4a | 1025 | if (ignore_reg_update(wiphy, initiator)) |
e38f8a7a | 1026 | goto out; |
b2e1b302 | 1027 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
8318d78a | 1028 | if (wiphy->bands[band]) |
a92a3ce7 | 1029 | handle_band(wiphy, band); |
b2e1b302 | 1030 | } |
e38f8a7a LR |
1031 | out: |
1032 | reg_process_beacons(wiphy); | |
038659e7 | 1033 | reg_process_ht_flags(wiphy); |
560e28e1 | 1034 | if (wiphy->reg_notifier) |
716f9392 | 1035 | wiphy->reg_notifier(wiphy, last_request); |
b2e1b302 LR |
1036 | } |
1037 | ||
1fa25e41 LR |
1038 | static void handle_channel_custom(struct wiphy *wiphy, |
1039 | enum ieee80211_band band, | |
1040 | unsigned int chan_idx, | |
1041 | const struct ieee80211_regdomain *regd) | |
1042 | { | |
1043 | int r; | |
038659e7 LR |
1044 | u32 desired_bw_khz = MHZ_TO_KHZ(20); |
1045 | u32 bw_flags = 0; | |
1fa25e41 LR |
1046 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1047 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1048 | const struct ieee80211_freq_range *freq_range = NULL; |
1fa25e41 LR |
1049 | struct ieee80211_supported_band *sband; |
1050 | struct ieee80211_channel *chan; | |
1051 | ||
abc7381b | 1052 | assert_reg_lock(); |
ac46d48e | 1053 | |
1fa25e41 LR |
1054 | sband = wiphy->bands[band]; |
1055 | BUG_ON(chan_idx >= sband->n_channels); | |
1056 | chan = &sband->channels[chan_idx]; | |
1057 | ||
038659e7 LR |
1058 | r = freq_reg_info_regd(wiphy, |
1059 | MHZ_TO_KHZ(chan->center_freq), | |
1060 | desired_bw_khz, | |
1061 | ®_rule, | |
1062 | regd); | |
1fa25e41 LR |
1063 | |
1064 | if (r) { | |
1065 | chan->flags = IEEE80211_CHAN_DISABLED; | |
1066 | return; | |
1067 | } | |
1068 | ||
1069 | power_rule = ®_rule->power_rule; | |
038659e7 LR |
1070 | freq_range = ®_rule->freq_range; |
1071 | ||
1072 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
1073 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
1fa25e41 | 1074 | |
038659e7 | 1075 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
1fa25e41 | 1076 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
1fa25e41 LR |
1077 | chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
1078 | } | |
1079 | ||
1080 | static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band, | |
1081 | const struct ieee80211_regdomain *regd) | |
1082 | { | |
1083 | unsigned int i; | |
1084 | struct ieee80211_supported_band *sband; | |
1085 | ||
1086 | BUG_ON(!wiphy->bands[band]); | |
1087 | sband = wiphy->bands[band]; | |
1088 | ||
1089 | for (i = 0; i < sband->n_channels; i++) | |
1090 | handle_channel_custom(wiphy, band, i, regd); | |
1091 | } | |
1092 | ||
1093 | /* Used by drivers prior to wiphy registration */ | |
1094 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1095 | const struct ieee80211_regdomain *regd) | |
1096 | { | |
1097 | enum ieee80211_band band; | |
bbcf3f02 | 1098 | unsigned int bands_set = 0; |
ac46d48e | 1099 | |
abc7381b | 1100 | mutex_lock(®_mutex); |
1fa25e41 | 1101 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
bbcf3f02 LR |
1102 | if (!wiphy->bands[band]) |
1103 | continue; | |
1104 | handle_band_custom(wiphy, band, regd); | |
1105 | bands_set++; | |
b2e1b302 | 1106 | } |
abc7381b | 1107 | mutex_unlock(®_mutex); |
bbcf3f02 LR |
1108 | |
1109 | /* | |
1110 | * no point in calling this if it won't have any effect | |
1111 | * on your device's supportd bands. | |
1112 | */ | |
1113 | WARN_ON(!bands_set); | |
b2e1b302 | 1114 | } |
1fa25e41 LR |
1115 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1116 | ||
fb1fc7ad LR |
1117 | /* |
1118 | * Return value which can be used by ignore_request() to indicate | |
1119 | * it has been determined we should intersect two regulatory domains | |
1120 | */ | |
9c96477d LR |
1121 | #define REG_INTERSECT 1 |
1122 | ||
84fa4f43 JB |
1123 | /* This has the logic which determines when a new request |
1124 | * should be ignored. */ | |
2f92cd2e LR |
1125 | static int ignore_request(struct wiphy *wiphy, |
1126 | struct regulatory_request *pending_request) | |
84fa4f43 | 1127 | { |
806a9e39 | 1128 | struct wiphy *last_wiphy = NULL; |
761cf7ec LR |
1129 | |
1130 | assert_cfg80211_lock(); | |
1131 | ||
84fa4f43 JB |
1132 | /* All initial requests are respected */ |
1133 | if (!last_request) | |
1134 | return 0; | |
1135 | ||
2f92cd2e | 1136 | switch (pending_request->initiator) { |
7db90f4a | 1137 | case NL80211_REGDOM_SET_BY_CORE: |
09d989d1 | 1138 | return 0; |
7db90f4a | 1139 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
806a9e39 LR |
1140 | |
1141 | last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); | |
1142 | ||
2f92cd2e | 1143 | if (unlikely(!is_an_alpha2(pending_request->alpha2))) |
84fa4f43 | 1144 | return -EINVAL; |
7db90f4a LR |
1145 | if (last_request->initiator == |
1146 | NL80211_REGDOM_SET_BY_COUNTRY_IE) { | |
806a9e39 | 1147 | if (last_wiphy != wiphy) { |
84fa4f43 JB |
1148 | /* |
1149 | * Two cards with two APs claiming different | |
1fe90b03 | 1150 | * Country IE alpha2s. We could |
84fa4f43 JB |
1151 | * intersect them, but that seems unlikely |
1152 | * to be correct. Reject second one for now. | |
1153 | */ | |
2f92cd2e | 1154 | if (regdom_changes(pending_request->alpha2)) |
84fa4f43 JB |
1155 | return -EOPNOTSUPP; |
1156 | return -EALREADY; | |
1157 | } | |
fb1fc7ad LR |
1158 | /* |
1159 | * Two consecutive Country IE hints on the same wiphy. | |
1160 | * This should be picked up early by the driver/stack | |
1161 | */ | |
2f92cd2e | 1162 | if (WARN_ON(regdom_changes(pending_request->alpha2))) |
84fa4f43 JB |
1163 | return 0; |
1164 | return -EALREADY; | |
1165 | } | |
3f2355cb | 1166 | return REG_INTERSECT; |
7db90f4a LR |
1167 | case NL80211_REGDOM_SET_BY_DRIVER: |
1168 | if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) { | |
2f92cd2e | 1169 | if (regdom_changes(pending_request->alpha2)) |
e74b1e7f | 1170 | return 0; |
84fa4f43 | 1171 | return -EALREADY; |
e74b1e7f | 1172 | } |
fff32c04 LR |
1173 | |
1174 | /* | |
1175 | * This would happen if you unplug and plug your card | |
1176 | * back in or if you add a new device for which the previously | |
1177 | * loaded card also agrees on the regulatory domain. | |
1178 | */ | |
7db90f4a | 1179 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
2f92cd2e | 1180 | !regdom_changes(pending_request->alpha2)) |
fff32c04 LR |
1181 | return -EALREADY; |
1182 | ||
3e0c3ff3 | 1183 | return REG_INTERSECT; |
7db90f4a LR |
1184 | case NL80211_REGDOM_SET_BY_USER: |
1185 | if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
9c96477d | 1186 | return REG_INTERSECT; |
fb1fc7ad LR |
1187 | /* |
1188 | * If the user knows better the user should set the regdom | |
1189 | * to their country before the IE is picked up | |
1190 | */ | |
7db90f4a | 1191 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER && |
3f2355cb LR |
1192 | last_request->intersect) |
1193 | return -EOPNOTSUPP; | |
fb1fc7ad LR |
1194 | /* |
1195 | * Process user requests only after previous user/driver/core | |
1196 | * requests have been processed | |
1197 | */ | |
7db90f4a LR |
1198 | if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE || |
1199 | last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1200 | last_request->initiator == NL80211_REGDOM_SET_BY_USER) { | |
69b1572b | 1201 | if (regdom_changes(last_request->alpha2)) |
5eebade6 LR |
1202 | return -EAGAIN; |
1203 | } | |
1204 | ||
baeb66fe | 1205 | if (!regdom_changes(pending_request->alpha2)) |
e74b1e7f LR |
1206 | return -EALREADY; |
1207 | ||
84fa4f43 JB |
1208 | return 0; |
1209 | } | |
1210 | ||
1211 | return -EINVAL; | |
1212 | } | |
1213 | ||
d1c96a9a LR |
1214 | /** |
1215 | * __regulatory_hint - hint to the wireless core a regulatory domain | |
1216 | * @wiphy: if the hint comes from country information from an AP, this | |
1217 | * is required to be set to the wiphy that received the information | |
28da32d7 | 1218 | * @pending_request: the regulatory request currently being processed |
d1c96a9a LR |
1219 | * |
1220 | * The Wireless subsystem can use this function to hint to the wireless core | |
28da32d7 | 1221 | * what it believes should be the current regulatory domain. |
d1c96a9a LR |
1222 | * |
1223 | * Returns zero if all went fine, %-EALREADY if a regulatory domain had | |
1224 | * already been set or other standard error codes. | |
1225 | * | |
abc7381b | 1226 | * Caller must hold &cfg80211_mutex and ®_mutex |
d1c96a9a | 1227 | */ |
28da32d7 LR |
1228 | static int __regulatory_hint(struct wiphy *wiphy, |
1229 | struct regulatory_request *pending_request) | |
b2e1b302 | 1230 | { |
9c96477d | 1231 | bool intersect = false; |
b2e1b302 LR |
1232 | int r = 0; |
1233 | ||
761cf7ec LR |
1234 | assert_cfg80211_lock(); |
1235 | ||
2f92cd2e | 1236 | r = ignore_request(wiphy, pending_request); |
9c96477d | 1237 | |
3e0c3ff3 | 1238 | if (r == REG_INTERSECT) { |
7db90f4a LR |
1239 | if (pending_request->initiator == |
1240 | NL80211_REGDOM_SET_BY_DRIVER) { | |
3e0c3ff3 | 1241 | r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); |
d951c1dd LR |
1242 | if (r) { |
1243 | kfree(pending_request); | |
3e0c3ff3 | 1244 | return r; |
d951c1dd | 1245 | } |
3e0c3ff3 | 1246 | } |
9c96477d | 1247 | intersect = true; |
3e0c3ff3 | 1248 | } else if (r) { |
fb1fc7ad LR |
1249 | /* |
1250 | * If the regulatory domain being requested by the | |
3e0c3ff3 | 1251 | * driver has already been set just copy it to the |
fb1fc7ad LR |
1252 | * wiphy |
1253 | */ | |
28da32d7 | 1254 | if (r == -EALREADY && |
7db90f4a LR |
1255 | pending_request->initiator == |
1256 | NL80211_REGDOM_SET_BY_DRIVER) { | |
3e0c3ff3 | 1257 | r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); |
d951c1dd LR |
1258 | if (r) { |
1259 | kfree(pending_request); | |
3e0c3ff3 | 1260 | return r; |
d951c1dd | 1261 | } |
3e0c3ff3 LR |
1262 | r = -EALREADY; |
1263 | goto new_request; | |
1264 | } | |
d951c1dd | 1265 | kfree(pending_request); |
b2e1b302 | 1266 | return r; |
3e0c3ff3 | 1267 | } |
b2e1b302 | 1268 | |
3e0c3ff3 | 1269 | new_request: |
d951c1dd | 1270 | kfree(last_request); |
5203cdb6 | 1271 | |
d951c1dd LR |
1272 | last_request = pending_request; |
1273 | last_request->intersect = intersect; | |
5203cdb6 | 1274 | |
d951c1dd | 1275 | pending_request = NULL; |
3e0c3ff3 | 1276 | |
09d989d1 LR |
1277 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) { |
1278 | user_alpha2[0] = last_request->alpha2[0]; | |
1279 | user_alpha2[1] = last_request->alpha2[1]; | |
1280 | } | |
1281 | ||
3e0c3ff3 | 1282 | /* When r == REG_INTERSECT we do need to call CRDA */ |
73d54c9e LR |
1283 | if (r < 0) { |
1284 | /* | |
1285 | * Since CRDA will not be called in this case as we already | |
1286 | * have applied the requested regulatory domain before we just | |
1287 | * inform userspace we have processed the request | |
1288 | */ | |
1289 | if (r == -EALREADY) | |
1290 | nl80211_send_reg_change_event(last_request); | |
3e0c3ff3 | 1291 | return r; |
73d54c9e | 1292 | } |
3e0c3ff3 | 1293 | |
d951c1dd | 1294 | return call_crda(last_request->alpha2); |
b2e1b302 LR |
1295 | } |
1296 | ||
30a548c7 | 1297 | /* This processes *all* regulatory hints */ |
d951c1dd | 1298 | static void reg_process_hint(struct regulatory_request *reg_request) |
fe33eb39 LR |
1299 | { |
1300 | int r = 0; | |
1301 | struct wiphy *wiphy = NULL; | |
c4c32294 | 1302 | enum nl80211_reg_initiator initiator = reg_request->initiator; |
fe33eb39 LR |
1303 | |
1304 | BUG_ON(!reg_request->alpha2); | |
1305 | ||
1306 | mutex_lock(&cfg80211_mutex); | |
abc7381b | 1307 | mutex_lock(®_mutex); |
fe33eb39 LR |
1308 | |
1309 | if (wiphy_idx_valid(reg_request->wiphy_idx)) | |
1310 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); | |
1311 | ||
7db90f4a | 1312 | if (reg_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
fe33eb39 | 1313 | !wiphy) { |
d951c1dd | 1314 | kfree(reg_request); |
fe33eb39 LR |
1315 | goto out; |
1316 | } | |
1317 | ||
28da32d7 | 1318 | r = __regulatory_hint(wiphy, reg_request); |
fe33eb39 | 1319 | /* This is required so that the orig_* parameters are saved */ |
5be83de5 JB |
1320 | if (r == -EALREADY && wiphy && |
1321 | wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) | |
c4c32294 | 1322 | wiphy_update_regulatory(wiphy, initiator); |
fe33eb39 | 1323 | out: |
abc7381b | 1324 | mutex_unlock(®_mutex); |
fe33eb39 | 1325 | mutex_unlock(&cfg80211_mutex); |
fe33eb39 LR |
1326 | } |
1327 | ||
7db90f4a | 1328 | /* Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* */ |
fe33eb39 LR |
1329 | static void reg_process_pending_hints(void) |
1330 | { | |
1331 | struct regulatory_request *reg_request; | |
fe33eb39 LR |
1332 | |
1333 | spin_lock(®_requests_lock); | |
1334 | while (!list_empty(®_requests_list)) { | |
1335 | reg_request = list_first_entry(®_requests_list, | |
1336 | struct regulatory_request, | |
1337 | list); | |
1338 | list_del_init(®_request->list); | |
fe33eb39 | 1339 | |
d951c1dd LR |
1340 | spin_unlock(®_requests_lock); |
1341 | reg_process_hint(reg_request); | |
fe33eb39 LR |
1342 | spin_lock(®_requests_lock); |
1343 | } | |
1344 | spin_unlock(®_requests_lock); | |
1345 | } | |
1346 | ||
e38f8a7a LR |
1347 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
1348 | static void reg_process_pending_beacon_hints(void) | |
1349 | { | |
79c97e97 | 1350 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
1351 | struct reg_beacon *pending_beacon, *tmp; |
1352 | ||
abc7381b LR |
1353 | /* |
1354 | * No need to hold the reg_mutex here as we just touch wiphys | |
1355 | * and do not read or access regulatory variables. | |
1356 | */ | |
e38f8a7a LR |
1357 | mutex_lock(&cfg80211_mutex); |
1358 | ||
1359 | /* This goes through the _pending_ beacon list */ | |
1360 | spin_lock_bh(®_pending_beacons_lock); | |
1361 | ||
1362 | if (list_empty(®_pending_beacons)) { | |
1363 | spin_unlock_bh(®_pending_beacons_lock); | |
1364 | goto out; | |
1365 | } | |
1366 | ||
1367 | list_for_each_entry_safe(pending_beacon, tmp, | |
1368 | ®_pending_beacons, list) { | |
1369 | ||
1370 | list_del_init(&pending_beacon->list); | |
1371 | ||
1372 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
1373 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
1374 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
1375 | |
1376 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
1377 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
1378 | } | |
1379 | ||
1380 | spin_unlock_bh(®_pending_beacons_lock); | |
1381 | out: | |
1382 | mutex_unlock(&cfg80211_mutex); | |
1383 | } | |
1384 | ||
fe33eb39 LR |
1385 | static void reg_todo(struct work_struct *work) |
1386 | { | |
1387 | reg_process_pending_hints(); | |
e38f8a7a | 1388 | reg_process_pending_beacon_hints(); |
fe33eb39 LR |
1389 | } |
1390 | ||
1391 | static DECLARE_WORK(reg_work, reg_todo); | |
1392 | ||
1393 | static void queue_regulatory_request(struct regulatory_request *request) | |
1394 | { | |
c61029c7 JL |
1395 | if (isalpha(request->alpha2[0])) |
1396 | request->alpha2[0] = toupper(request->alpha2[0]); | |
1397 | if (isalpha(request->alpha2[1])) | |
1398 | request->alpha2[1] = toupper(request->alpha2[1]); | |
1399 | ||
fe33eb39 LR |
1400 | spin_lock(®_requests_lock); |
1401 | list_add_tail(&request->list, ®_requests_list); | |
1402 | spin_unlock(®_requests_lock); | |
1403 | ||
1404 | schedule_work(®_work); | |
1405 | } | |
1406 | ||
09d989d1 LR |
1407 | /* |
1408 | * Core regulatory hint -- happens during cfg80211_init() | |
1409 | * and when we restore regulatory settings. | |
1410 | */ | |
ba25c141 LR |
1411 | static int regulatory_hint_core(const char *alpha2) |
1412 | { | |
1413 | struct regulatory_request *request; | |
1414 | ||
09d989d1 LR |
1415 | kfree(last_request); |
1416 | last_request = NULL; | |
ba25c141 LR |
1417 | |
1418 | request = kzalloc(sizeof(struct regulatory_request), | |
1419 | GFP_KERNEL); | |
1420 | if (!request) | |
1421 | return -ENOMEM; | |
1422 | ||
1423 | request->alpha2[0] = alpha2[0]; | |
1424 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1425 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 1426 | |
5078b2e3 LR |
1427 | /* |
1428 | * This ensures last_request is populated once modules | |
1429 | * come swinging in and calling regulatory hints and | |
1430 | * wiphy_apply_custom_regulatory(). | |
1431 | */ | |
a2bff269 | 1432 | reg_process_hint(request); |
5078b2e3 | 1433 | |
fe33eb39 | 1434 | return 0; |
ba25c141 LR |
1435 | } |
1436 | ||
fe33eb39 LR |
1437 | /* User hints */ |
1438 | int regulatory_hint_user(const char *alpha2) | |
b2e1b302 | 1439 | { |
fe33eb39 LR |
1440 | struct regulatory_request *request; |
1441 | ||
be3d4810 | 1442 | BUG_ON(!alpha2); |
b2e1b302 | 1443 | |
fe33eb39 LR |
1444 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1445 | if (!request) | |
1446 | return -ENOMEM; | |
1447 | ||
1448 | request->wiphy_idx = WIPHY_IDX_STALE; | |
1449 | request->alpha2[0] = alpha2[0]; | |
1450 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 1451 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
fe33eb39 LR |
1452 | |
1453 | queue_regulatory_request(request); | |
1454 | ||
1455 | return 0; | |
1456 | } | |
1457 | ||
1458 | /* Driver hints */ | |
1459 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
1460 | { | |
1461 | struct regulatory_request *request; | |
1462 | ||
1463 | BUG_ON(!alpha2); | |
1464 | BUG_ON(!wiphy); | |
1465 | ||
1466 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); | |
1467 | if (!request) | |
1468 | return -ENOMEM; | |
1469 | ||
1470 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
1471 | ||
1472 | /* Must have registered wiphy first */ | |
1473 | BUG_ON(!wiphy_idx_valid(request->wiphy_idx)); | |
1474 | ||
1475 | request->alpha2[0] = alpha2[0]; | |
1476 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1477 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 LR |
1478 | |
1479 | queue_regulatory_request(request); | |
1480 | ||
1481 | return 0; | |
b2e1b302 LR |
1482 | } |
1483 | EXPORT_SYMBOL(regulatory_hint); | |
1484 | ||
4b44c8bc LR |
1485 | /* |
1486 | * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and | |
1487 | * therefore cannot iterate over the rdev list here. | |
1488 | */ | |
3f2355cb | 1489 | void regulatory_hint_11d(struct wiphy *wiphy, |
84920e3e LR |
1490 | enum ieee80211_band band, |
1491 | u8 *country_ie, | |
1492 | u8 country_ie_len) | |
3f2355cb | 1493 | { |
3f2355cb | 1494 | char alpha2[2]; |
3f2355cb | 1495 | enum environment_cap env = ENVIRON_ANY; |
fe33eb39 | 1496 | struct regulatory_request *request; |
3f2355cb | 1497 | |
abc7381b | 1498 | mutex_lock(®_mutex); |
3f2355cb | 1499 | |
9828b017 LR |
1500 | if (unlikely(!last_request)) |
1501 | goto out; | |
d335fe63 | 1502 | |
3f2355cb LR |
1503 | /* IE len must be evenly divisible by 2 */ |
1504 | if (country_ie_len & 0x01) | |
1505 | goto out; | |
1506 | ||
1507 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
1508 | goto out; | |
1509 | ||
3f2355cb LR |
1510 | alpha2[0] = country_ie[0]; |
1511 | alpha2[1] = country_ie[1]; | |
1512 | ||
1513 | if (country_ie[2] == 'I') | |
1514 | env = ENVIRON_INDOOR; | |
1515 | else if (country_ie[2] == 'O') | |
1516 | env = ENVIRON_OUTDOOR; | |
1517 | ||
fb1fc7ad | 1518 | /* |
8b19e6ca | 1519 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc LR |
1520 | * We leave conflict resolution to the workqueue, where can hold |
1521 | * cfg80211_mutex. | |
fb1fc7ad | 1522 | */ |
cc0b6fe8 LR |
1523 | if (likely(last_request->initiator == |
1524 | NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
4b44c8bc LR |
1525 | wiphy_idx_valid(last_request->wiphy_idx))) |
1526 | goto out; | |
3f2355cb | 1527 | |
fe33eb39 LR |
1528 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1529 | if (!request) | |
f9f9b6e3 | 1530 | goto out; |
fe33eb39 | 1531 | |
fe33eb39 | 1532 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
1533 | request->alpha2[0] = alpha2[0]; |
1534 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1535 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
1536 | request->country_ie_env = env; |
1537 | ||
abc7381b | 1538 | mutex_unlock(®_mutex); |
3f2355cb | 1539 | |
fe33eb39 LR |
1540 | queue_regulatory_request(request); |
1541 | ||
1542 | return; | |
0441d6ff | 1543 | |
3f2355cb | 1544 | out: |
abc7381b | 1545 | mutex_unlock(®_mutex); |
3f2355cb | 1546 | } |
b2e1b302 | 1547 | |
09d989d1 LR |
1548 | static void restore_alpha2(char *alpha2, bool reset_user) |
1549 | { | |
1550 | /* indicates there is no alpha2 to consider for restoration */ | |
1551 | alpha2[0] = '9'; | |
1552 | alpha2[1] = '7'; | |
1553 | ||
1554 | /* The user setting has precedence over the module parameter */ | |
1555 | if (is_user_regdom_saved()) { | |
1556 | /* Unless we're asked to ignore it and reset it */ | |
1557 | if (reset_user) { | |
1558 | REG_DBG_PRINT("cfg80211: Restoring regulatory settings " | |
1559 | "including user preference\n"); | |
1560 | user_alpha2[0] = '9'; | |
1561 | user_alpha2[1] = '7'; | |
1562 | ||
1563 | /* | |
1564 | * If we're ignoring user settings, we still need to | |
1565 | * check the module parameter to ensure we put things | |
1566 | * back as they were for a full restore. | |
1567 | */ | |
1568 | if (!is_world_regdom(ieee80211_regdom)) { | |
1569 | REG_DBG_PRINT("cfg80211: Keeping preference on " | |
1570 | "module parameter ieee80211_regdom: %c%c\n", | |
1571 | ieee80211_regdom[0], | |
1572 | ieee80211_regdom[1]); | |
1573 | alpha2[0] = ieee80211_regdom[0]; | |
1574 | alpha2[1] = ieee80211_regdom[1]; | |
1575 | } | |
1576 | } else { | |
1577 | REG_DBG_PRINT("cfg80211: Restoring regulatory settings " | |
1578 | "while preserving user preference for: %c%c\n", | |
1579 | user_alpha2[0], | |
1580 | user_alpha2[1]); | |
1581 | alpha2[0] = user_alpha2[0]; | |
1582 | alpha2[1] = user_alpha2[1]; | |
1583 | } | |
1584 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
1585 | REG_DBG_PRINT("cfg80211: Keeping preference on " | |
1586 | "module parameter ieee80211_regdom: %c%c\n", | |
1587 | ieee80211_regdom[0], | |
1588 | ieee80211_regdom[1]); | |
1589 | alpha2[0] = ieee80211_regdom[0]; | |
1590 | alpha2[1] = ieee80211_regdom[1]; | |
1591 | } else | |
1592 | REG_DBG_PRINT("cfg80211: Restoring regulatory settings\n"); | |
1593 | } | |
1594 | ||
1595 | /* | |
1596 | * Restoring regulatory settings involves ingoring any | |
1597 | * possibly stale country IE information and user regulatory | |
1598 | * settings if so desired, this includes any beacon hints | |
1599 | * learned as we could have traveled outside to another country | |
1600 | * after disconnection. To restore regulatory settings we do | |
1601 | * exactly what we did at bootup: | |
1602 | * | |
1603 | * - send a core regulatory hint | |
1604 | * - send a user regulatory hint if applicable | |
1605 | * | |
1606 | * Device drivers that send a regulatory hint for a specific country | |
1607 | * keep their own regulatory domain on wiphy->regd so that does does | |
1608 | * not need to be remembered. | |
1609 | */ | |
1610 | static void restore_regulatory_settings(bool reset_user) | |
1611 | { | |
1612 | char alpha2[2]; | |
1613 | struct reg_beacon *reg_beacon, *btmp; | |
1614 | ||
1615 | mutex_lock(&cfg80211_mutex); | |
1616 | mutex_lock(®_mutex); | |
1617 | ||
1618 | reset_regdomains(); | |
1619 | restore_alpha2(alpha2, reset_user); | |
1620 | ||
1621 | /* Clear beacon hints */ | |
1622 | spin_lock_bh(®_pending_beacons_lock); | |
1623 | if (!list_empty(®_pending_beacons)) { | |
1624 | list_for_each_entry_safe(reg_beacon, btmp, | |
1625 | ®_pending_beacons, list) { | |
1626 | list_del(®_beacon->list); | |
1627 | kfree(reg_beacon); | |
1628 | } | |
1629 | } | |
1630 | spin_unlock_bh(®_pending_beacons_lock); | |
1631 | ||
1632 | if (!list_empty(®_beacon_list)) { | |
1633 | list_for_each_entry_safe(reg_beacon, btmp, | |
1634 | ®_beacon_list, list) { | |
1635 | list_del(®_beacon->list); | |
1636 | kfree(reg_beacon); | |
1637 | } | |
1638 | } | |
1639 | ||
1640 | /* First restore to the basic regulatory settings */ | |
1641 | cfg80211_regdomain = cfg80211_world_regdom; | |
1642 | ||
1643 | mutex_unlock(®_mutex); | |
1644 | mutex_unlock(&cfg80211_mutex); | |
1645 | ||
1646 | regulatory_hint_core(cfg80211_regdomain->alpha2); | |
1647 | ||
1648 | /* | |
1649 | * This restores the ieee80211_regdom module parameter | |
1650 | * preference or the last user requested regulatory | |
1651 | * settings, user regulatory settings takes precedence. | |
1652 | */ | |
1653 | if (is_an_alpha2(alpha2)) | |
1654 | regulatory_hint_user(user_alpha2); | |
1655 | } | |
1656 | ||
1657 | ||
1658 | void regulatory_hint_disconnect(void) | |
1659 | { | |
1660 | REG_DBG_PRINT("cfg80211: All devices are disconnected, going to " | |
1661 | "restore regulatory settings\n"); | |
1662 | restore_regulatory_settings(false); | |
1663 | } | |
1664 | ||
e38f8a7a LR |
1665 | static bool freq_is_chan_12_13_14(u16 freq) |
1666 | { | |
1667 | if (freq == ieee80211_channel_to_frequency(12) || | |
1668 | freq == ieee80211_channel_to_frequency(13) || | |
1669 | freq == ieee80211_channel_to_frequency(14)) | |
1670 | return true; | |
1671 | return false; | |
1672 | } | |
1673 | ||
1674 | int regulatory_hint_found_beacon(struct wiphy *wiphy, | |
1675 | struct ieee80211_channel *beacon_chan, | |
1676 | gfp_t gfp) | |
1677 | { | |
1678 | struct reg_beacon *reg_beacon; | |
1679 | ||
1680 | if (likely((beacon_chan->beacon_found || | |
1681 | (beacon_chan->flags & IEEE80211_CHAN_RADAR) || | |
1682 | (beacon_chan->band == IEEE80211_BAND_2GHZ && | |
1683 | !freq_is_chan_12_13_14(beacon_chan->center_freq))))) | |
1684 | return 0; | |
1685 | ||
1686 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
1687 | if (!reg_beacon) | |
1688 | return -ENOMEM; | |
1689 | ||
4113f751 LR |
1690 | REG_DBG_PRINT("cfg80211: Found new beacon on " |
1691 | "frequency: %d MHz (Ch %d) on %s\n", | |
1692 | beacon_chan->center_freq, | |
1693 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
1694 | wiphy_name(wiphy)); | |
1695 | ||
e38f8a7a LR |
1696 | memcpy(®_beacon->chan, beacon_chan, |
1697 | sizeof(struct ieee80211_channel)); | |
1698 | ||
1699 | ||
1700 | /* | |
1701 | * Since we can be called from BH or and non-BH context | |
1702 | * we must use spin_lock_bh() | |
1703 | */ | |
1704 | spin_lock_bh(®_pending_beacons_lock); | |
1705 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
1706 | spin_unlock_bh(®_pending_beacons_lock); | |
1707 | ||
1708 | schedule_work(®_work); | |
1709 | ||
1710 | return 0; | |
1711 | } | |
1712 | ||
a3d2eaf0 | 1713 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
1714 | { |
1715 | unsigned int i; | |
a3d2eaf0 JB |
1716 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1717 | const struct ieee80211_freq_range *freq_range = NULL; | |
1718 | const struct ieee80211_power_rule *power_rule = NULL; | |
b2e1b302 | 1719 | |
269ac5fd | 1720 | printk(KERN_INFO " (start_freq - end_freq @ bandwidth), " |
b2e1b302 LR |
1721 | "(max_antenna_gain, max_eirp)\n"); |
1722 | ||
1723 | for (i = 0; i < rd->n_reg_rules; i++) { | |
1724 | reg_rule = &rd->reg_rules[i]; | |
1725 | freq_range = ®_rule->freq_range; | |
1726 | power_rule = ®_rule->power_rule; | |
1727 | ||
fb1fc7ad LR |
1728 | /* |
1729 | * There may not be documentation for max antenna gain | |
1730 | * in certain regions | |
1731 | */ | |
b2e1b302 | 1732 | if (power_rule->max_antenna_gain) |
269ac5fd | 1733 | printk(KERN_INFO " (%d KHz - %d KHz @ %d KHz), " |
b2e1b302 LR |
1734 | "(%d mBi, %d mBm)\n", |
1735 | freq_range->start_freq_khz, | |
1736 | freq_range->end_freq_khz, | |
1737 | freq_range->max_bandwidth_khz, | |
1738 | power_rule->max_antenna_gain, | |
1739 | power_rule->max_eirp); | |
1740 | else | |
269ac5fd | 1741 | printk(KERN_INFO " (%d KHz - %d KHz @ %d KHz), " |
b2e1b302 LR |
1742 | "(N/A, %d mBm)\n", |
1743 | freq_range->start_freq_khz, | |
1744 | freq_range->end_freq_khz, | |
1745 | freq_range->max_bandwidth_khz, | |
1746 | power_rule->max_eirp); | |
1747 | } | |
1748 | } | |
1749 | ||
a3d2eaf0 | 1750 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
1751 | { |
1752 | ||
3f2355cb | 1753 | if (is_intersected_alpha2(rd->alpha2)) { |
3f2355cb | 1754 | |
7db90f4a LR |
1755 | if (last_request->initiator == |
1756 | NL80211_REGDOM_SET_BY_COUNTRY_IE) { | |
79c97e97 JB |
1757 | struct cfg80211_registered_device *rdev; |
1758 | rdev = cfg80211_rdev_by_wiphy_idx( | |
806a9e39 | 1759 | last_request->wiphy_idx); |
79c97e97 | 1760 | if (rdev) { |
3f2355cb LR |
1761 | printk(KERN_INFO "cfg80211: Current regulatory " |
1762 | "domain updated by AP to: %c%c\n", | |
79c97e97 JB |
1763 | rdev->country_ie_alpha2[0], |
1764 | rdev->country_ie_alpha2[1]); | |
3f2355cb LR |
1765 | } else |
1766 | printk(KERN_INFO "cfg80211: Current regulatory " | |
55f98938 | 1767 | "domain intersected:\n"); |
3f2355cb | 1768 | } else |
55f98938 FP |
1769 | printk(KERN_INFO "cfg80211: Current regulatory " |
1770 | "domain intersected:\n"); | |
3f2355cb | 1771 | } else if (is_world_regdom(rd->alpha2)) |
b2e1b302 LR |
1772 | printk(KERN_INFO "cfg80211: World regulatory " |
1773 | "domain updated:\n"); | |
1774 | else { | |
1775 | if (is_unknown_alpha2(rd->alpha2)) | |
1776 | printk(KERN_INFO "cfg80211: Regulatory domain " | |
1777 | "changed to driver built-in settings " | |
1778 | "(unknown country)\n"); | |
1779 | else | |
1780 | printk(KERN_INFO "cfg80211: Regulatory domain " | |
1781 | "changed to country: %c%c\n", | |
1782 | rd->alpha2[0], rd->alpha2[1]); | |
1783 | } | |
1784 | print_rd_rules(rd); | |
1785 | } | |
1786 | ||
2df78167 | 1787 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
1788 | { |
1789 | printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n", | |
1790 | rd->alpha2[0], rd->alpha2[1]); | |
1791 | print_rd_rules(rd); | |
1792 | } | |
1793 | ||
d2372b31 | 1794 | /* Takes ownership of rd only if it doesn't fail */ |
a3d2eaf0 | 1795 | static int __set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 1796 | { |
9c96477d | 1797 | const struct ieee80211_regdomain *intersected_rd = NULL; |
79c97e97 | 1798 | struct cfg80211_registered_device *rdev = NULL; |
806a9e39 | 1799 | struct wiphy *request_wiphy; |
b2e1b302 LR |
1800 | /* Some basic sanity checks first */ |
1801 | ||
b2e1b302 | 1802 | if (is_world_regdom(rd->alpha2)) { |
f6037d09 | 1803 | if (WARN_ON(!reg_is_valid_request(rd->alpha2))) |
b2e1b302 LR |
1804 | return -EINVAL; |
1805 | update_world_regdomain(rd); | |
1806 | return 0; | |
1807 | } | |
b2e1b302 LR |
1808 | |
1809 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && | |
1810 | !is_unknown_alpha2(rd->alpha2)) | |
1811 | return -EINVAL; | |
1812 | ||
f6037d09 | 1813 | if (!last_request) |
b2e1b302 LR |
1814 | return -EINVAL; |
1815 | ||
fb1fc7ad LR |
1816 | /* |
1817 | * Lets only bother proceeding on the same alpha2 if the current | |
3f2355cb | 1818 | * rd is non static (it means CRDA was present and was used last) |
fb1fc7ad LR |
1819 | * and the pending request came in from a country IE |
1820 | */ | |
7db90f4a | 1821 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
fb1fc7ad LR |
1822 | /* |
1823 | * If someone else asked us to change the rd lets only bother | |
1824 | * checking if the alpha2 changes if CRDA was already called | |
1825 | */ | |
baeb66fe | 1826 | if (!regdom_changes(rd->alpha2)) |
3f2355cb LR |
1827 | return -EINVAL; |
1828 | } | |
1829 | ||
fb1fc7ad LR |
1830 | /* |
1831 | * Now lets set the regulatory domain, update all driver channels | |
b2e1b302 LR |
1832 | * and finally inform them of what we have done, in case they want |
1833 | * to review or adjust their own settings based on their own | |
fb1fc7ad LR |
1834 | * internal EEPROM data |
1835 | */ | |
b2e1b302 | 1836 | |
f6037d09 | 1837 | if (WARN_ON(!reg_is_valid_request(rd->alpha2))) |
b2e1b302 LR |
1838 | return -EINVAL; |
1839 | ||
8375af3b LR |
1840 | if (!is_valid_rd(rd)) { |
1841 | printk(KERN_ERR "cfg80211: Invalid " | |
1842 | "regulatory domain detected:\n"); | |
1843 | print_regdomain_info(rd); | |
1844 | return -EINVAL; | |
b2e1b302 LR |
1845 | } |
1846 | ||
806a9e39 LR |
1847 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
1848 | ||
b8295acd | 1849 | if (!last_request->intersect) { |
3e0c3ff3 LR |
1850 | int r; |
1851 | ||
7db90f4a | 1852 | if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) { |
3e0c3ff3 LR |
1853 | reset_regdomains(); |
1854 | cfg80211_regdomain = rd; | |
1855 | return 0; | |
1856 | } | |
1857 | ||
fb1fc7ad LR |
1858 | /* |
1859 | * For a driver hint, lets copy the regulatory domain the | |
1860 | * driver wanted to the wiphy to deal with conflicts | |
1861 | */ | |
3e0c3ff3 | 1862 | |
558f6d32 LR |
1863 | /* |
1864 | * Userspace could have sent two replies with only | |
1865 | * one kernel request. | |
1866 | */ | |
1867 | if (request_wiphy->regd) | |
1868 | return -EALREADY; | |
3e0c3ff3 | 1869 | |
806a9e39 | 1870 | r = reg_copy_regd(&request_wiphy->regd, rd); |
3e0c3ff3 LR |
1871 | if (r) |
1872 | return r; | |
1873 | ||
b8295acd LR |
1874 | reset_regdomains(); |
1875 | cfg80211_regdomain = rd; | |
1876 | return 0; | |
1877 | } | |
1878 | ||
1879 | /* Intersection requires a bit more work */ | |
1880 | ||
7db90f4a | 1881 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
b8295acd | 1882 | |
9c96477d LR |
1883 | intersected_rd = regdom_intersect(rd, cfg80211_regdomain); |
1884 | if (!intersected_rd) | |
1885 | return -EINVAL; | |
b8295acd | 1886 | |
fb1fc7ad LR |
1887 | /* |
1888 | * We can trash what CRDA provided now. | |
3e0c3ff3 | 1889 | * However if a driver requested this specific regulatory |
fb1fc7ad LR |
1890 | * domain we keep it for its private use |
1891 | */ | |
7db90f4a | 1892 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) |
806a9e39 | 1893 | request_wiphy->regd = rd; |
3e0c3ff3 LR |
1894 | else |
1895 | kfree(rd); | |
1896 | ||
b8295acd LR |
1897 | rd = NULL; |
1898 | ||
1899 | reset_regdomains(); | |
1900 | cfg80211_regdomain = intersected_rd; | |
1901 | ||
1902 | return 0; | |
9c96477d LR |
1903 | } |
1904 | ||
3f2355cb LR |
1905 | if (!intersected_rd) |
1906 | return -EINVAL; | |
1907 | ||
79c97e97 | 1908 | rdev = wiphy_to_dev(request_wiphy); |
3f2355cb | 1909 | |
79c97e97 JB |
1910 | rdev->country_ie_alpha2[0] = rd->alpha2[0]; |
1911 | rdev->country_ie_alpha2[1] = rd->alpha2[1]; | |
1912 | rdev->env = last_request->country_ie_env; | |
3f2355cb LR |
1913 | |
1914 | BUG_ON(intersected_rd == rd); | |
1915 | ||
1916 | kfree(rd); | |
1917 | rd = NULL; | |
1918 | ||
b8295acd | 1919 | reset_regdomains(); |
3f2355cb | 1920 | cfg80211_regdomain = intersected_rd; |
b2e1b302 LR |
1921 | |
1922 | return 0; | |
1923 | } | |
1924 | ||
1925 | ||
fb1fc7ad LR |
1926 | /* |
1927 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 1928 | * multiple drivers can be ironed out later. Caller must've already |
fb1fc7ad LR |
1929 | * kmalloc'd the rd structure. Caller must hold cfg80211_mutex |
1930 | */ | |
a3d2eaf0 | 1931 | int set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 1932 | { |
b2e1b302 LR |
1933 | int r; |
1934 | ||
761cf7ec LR |
1935 | assert_cfg80211_lock(); |
1936 | ||
abc7381b LR |
1937 | mutex_lock(®_mutex); |
1938 | ||
b2e1b302 LR |
1939 | /* Note that this doesn't update the wiphys, this is done below */ |
1940 | r = __set_regdom(rd); | |
d2372b31 JB |
1941 | if (r) { |
1942 | kfree(rd); | |
abc7381b | 1943 | mutex_unlock(®_mutex); |
b2e1b302 | 1944 | return r; |
d2372b31 | 1945 | } |
b2e1b302 | 1946 | |
b2e1b302 | 1947 | /* This would make this whole thing pointless */ |
a01ddafd LR |
1948 | if (!last_request->intersect) |
1949 | BUG_ON(rd != cfg80211_regdomain); | |
b2e1b302 LR |
1950 | |
1951 | /* update all wiphys now with the new established regulatory domain */ | |
f6037d09 | 1952 | update_all_wiphy_regulatory(last_request->initiator); |
b2e1b302 | 1953 | |
a01ddafd | 1954 | print_regdomain(cfg80211_regdomain); |
b2e1b302 | 1955 | |
73d54c9e LR |
1956 | nl80211_send_reg_change_event(last_request); |
1957 | ||
abc7381b LR |
1958 | mutex_unlock(®_mutex); |
1959 | ||
b2e1b302 LR |
1960 | return r; |
1961 | } | |
1962 | ||
a1794390 | 1963 | /* Caller must hold cfg80211_mutex */ |
3f2355cb LR |
1964 | void reg_device_remove(struct wiphy *wiphy) |
1965 | { | |
0ad8acaf | 1966 | struct wiphy *request_wiphy = NULL; |
806a9e39 | 1967 | |
761cf7ec LR |
1968 | assert_cfg80211_lock(); |
1969 | ||
abc7381b LR |
1970 | mutex_lock(®_mutex); |
1971 | ||
0ef9ccdd CW |
1972 | kfree(wiphy->regd); |
1973 | ||
0ad8acaf LR |
1974 | if (last_request) |
1975 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); | |
806a9e39 | 1976 | |
0ef9ccdd | 1977 | if (!request_wiphy || request_wiphy != wiphy) |
abc7381b | 1978 | goto out; |
0ef9ccdd | 1979 | |
806a9e39 | 1980 | last_request->wiphy_idx = WIPHY_IDX_STALE; |
3f2355cb | 1981 | last_request->country_ie_env = ENVIRON_ANY; |
abc7381b LR |
1982 | out: |
1983 | mutex_unlock(®_mutex); | |
3f2355cb LR |
1984 | } |
1985 | ||
2fcc9f73 | 1986 | int __init regulatory_init(void) |
b2e1b302 | 1987 | { |
bcf4f99b | 1988 | int err = 0; |
734366de | 1989 | |
b2e1b302 LR |
1990 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
1991 | if (IS_ERR(reg_pdev)) | |
1992 | return PTR_ERR(reg_pdev); | |
734366de | 1993 | |
fe33eb39 | 1994 | spin_lock_init(®_requests_lock); |
e38f8a7a | 1995 | spin_lock_init(®_pending_beacons_lock); |
fe33eb39 | 1996 | |
a3d2eaf0 | 1997 | cfg80211_regdomain = cfg80211_world_regdom; |
734366de | 1998 | |
09d989d1 LR |
1999 | user_alpha2[0] = '9'; |
2000 | user_alpha2[1] = '7'; | |
2001 | ||
ae9e4b0d LR |
2002 | /* We always try to get an update for the static regdomain */ |
2003 | err = regulatory_hint_core(cfg80211_regdomain->alpha2); | |
ba25c141 | 2004 | if (err) { |
bcf4f99b LR |
2005 | if (err == -ENOMEM) |
2006 | return err; | |
2007 | /* | |
2008 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
2009 | * memory which is handled and propagated appropriately above | |
2010 | * but it can also fail during a netlink_broadcast() or during | |
2011 | * early boot for call_usermodehelper(). For now treat these | |
2012 | * errors as non-fatal. | |
2013 | */ | |
2014 | printk(KERN_ERR "cfg80211: kobject_uevent_env() was unable " | |
2015 | "to call CRDA during init"); | |
2016 | #ifdef CONFIG_CFG80211_REG_DEBUG | |
2017 | /* We want to find out exactly why when debugging */ | |
2018 | WARN_ON(err); | |
734366de | 2019 | #endif |
bcf4f99b | 2020 | } |
734366de | 2021 | |
ae9e4b0d LR |
2022 | /* |
2023 | * Finally, if the user set the module parameter treat it | |
2024 | * as a user hint. | |
2025 | */ | |
2026 | if (!is_world_regdom(ieee80211_regdom)) | |
2027 | regulatory_hint_user(ieee80211_regdom); | |
2028 | ||
b2e1b302 LR |
2029 | return 0; |
2030 | } | |
2031 | ||
2fcc9f73 | 2032 | void /* __init_or_exit */ regulatory_exit(void) |
b2e1b302 | 2033 | { |
fe33eb39 | 2034 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 2035 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
2036 | |
2037 | cancel_work_sync(®_work); | |
2038 | ||
a1794390 | 2039 | mutex_lock(&cfg80211_mutex); |
abc7381b | 2040 | mutex_lock(®_mutex); |
734366de | 2041 | |
b2e1b302 | 2042 | reset_regdomains(); |
734366de | 2043 | |
f6037d09 JB |
2044 | kfree(last_request); |
2045 | ||
b2e1b302 | 2046 | platform_device_unregister(reg_pdev); |
734366de | 2047 | |
e38f8a7a LR |
2048 | spin_lock_bh(®_pending_beacons_lock); |
2049 | if (!list_empty(®_pending_beacons)) { | |
2050 | list_for_each_entry_safe(reg_beacon, btmp, | |
2051 | ®_pending_beacons, list) { | |
2052 | list_del(®_beacon->list); | |
2053 | kfree(reg_beacon); | |
2054 | } | |
2055 | } | |
2056 | spin_unlock_bh(®_pending_beacons_lock); | |
2057 | ||
2058 | if (!list_empty(®_beacon_list)) { | |
2059 | list_for_each_entry_safe(reg_beacon, btmp, | |
2060 | ®_beacon_list, list) { | |
2061 | list_del(®_beacon->list); | |
2062 | kfree(reg_beacon); | |
2063 | } | |
2064 | } | |
2065 | ||
fe33eb39 LR |
2066 | spin_lock(®_requests_lock); |
2067 | if (!list_empty(®_requests_list)) { | |
2068 | list_for_each_entry_safe(reg_request, tmp, | |
2069 | ®_requests_list, list) { | |
2070 | list_del(®_request->list); | |
2071 | kfree(reg_request); | |
2072 | } | |
2073 | } | |
2074 | spin_unlock(®_requests_lock); | |
2075 | ||
abc7381b | 2076 | mutex_unlock(®_mutex); |
a1794390 | 2077 | mutex_unlock(&cfg80211_mutex); |
8318d78a | 2078 | } |