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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> | |
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 | 34 | */ |
e9c0268f JP |
35 | |
36 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
37 | ||
8318d78a | 38 | #include <linux/kernel.h> |
5a0e3ad6 | 39 | #include <linux/slab.h> |
b2e1b302 LR |
40 | #include <linux/list.h> |
41 | #include <linux/random.h> | |
c61029c7 | 42 | #include <linux/ctype.h> |
b2e1b302 LR |
43 | #include <linux/nl80211.h> |
44 | #include <linux/platform_device.h> | |
b2e1b302 | 45 | #include <net/cfg80211.h> |
8318d78a | 46 | #include "core.h" |
b2e1b302 | 47 | #include "reg.h" |
3b377ea9 | 48 | #include "regdb.h" |
73d54c9e | 49 | #include "nl80211.h" |
8318d78a | 50 | |
4113f751 | 51 | #ifdef CONFIG_CFG80211_REG_DEBUG |
8271195e | 52 | #define REG_DBG_PRINT(format, args...) \ |
4113f751 | 53 | do { \ |
e9c0268f | 54 | printk(KERN_DEBUG pr_fmt(format), ##args); \ |
4113f751 LR |
55 | } while (0) |
56 | #else | |
8271195e | 57 | #define REG_DBG_PRINT(args...) |
4113f751 LR |
58 | #endif |
59 | ||
5166ccd2 | 60 | /* Receipt of information from last regulatory request */ |
f6037d09 | 61 | static struct regulatory_request *last_request; |
734366de | 62 | |
b2e1b302 LR |
63 | /* To trigger userspace events */ |
64 | static struct platform_device *reg_pdev; | |
8318d78a | 65 | |
fb1fc7ad LR |
66 | /* |
67 | * Central wireless core regulatory domains, we only need two, | |
734366de | 68 | * the current one and a world regulatory domain in case we have no |
fb1fc7ad LR |
69 | * information to give us an alpha2 |
70 | */ | |
f130347c | 71 | const struct ieee80211_regdomain *cfg80211_regdomain; |
734366de | 72 | |
abc7381b LR |
73 | /* |
74 | * Protects static reg.c components: | |
75 | * - cfg80211_world_regdom | |
76 | * - cfg80211_regdom | |
abc7381b LR |
77 | * - last_request |
78 | */ | |
670b7f11 | 79 | static DEFINE_MUTEX(reg_mutex); |
46a5ebaf JB |
80 | |
81 | static inline void assert_reg_lock(void) | |
82 | { | |
83 | lockdep_assert_held(®_mutex); | |
84 | } | |
abc7381b | 85 | |
e38f8a7a | 86 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
87 | static LIST_HEAD(reg_requests_list); |
88 | static spinlock_t reg_requests_lock; | |
89 | ||
e38f8a7a LR |
90 | /* Used to queue up beacon hints for review */ |
91 | static LIST_HEAD(reg_pending_beacons); | |
92 | static spinlock_t reg_pending_beacons_lock; | |
93 | ||
94 | /* Used to keep track of processed beacon hints */ | |
95 | static LIST_HEAD(reg_beacon_list); | |
96 | ||
97 | struct reg_beacon { | |
98 | struct list_head list; | |
99 | struct ieee80211_channel chan; | |
100 | }; | |
101 | ||
f333a7a2 LR |
102 | static void reg_todo(struct work_struct *work); |
103 | static DECLARE_WORK(reg_work, reg_todo); | |
104 | ||
734366de JB |
105 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
106 | static const struct ieee80211_regdomain world_regdom = { | |
611b6a82 | 107 | .n_reg_rules = 5, |
734366de JB |
108 | .alpha2 = "00", |
109 | .reg_rules = { | |
68798a62 LR |
110 | /* IEEE 802.11b/g, channels 1..11 */ |
111 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
611b6a82 LR |
112 | /* IEEE 802.11b/g, channels 12..13. No HT40 |
113 | * channel fits here. */ | |
114 | REG_RULE(2467-10, 2472+10, 20, 6, 20, | |
3fc71f77 LR |
115 | NL80211_RRF_PASSIVE_SCAN | |
116 | NL80211_RRF_NO_IBSS), | |
611b6a82 LR |
117 | /* IEEE 802.11 channel 14 - Only JP enables |
118 | * this and for 802.11b only */ | |
119 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
120 | NL80211_RRF_PASSIVE_SCAN | | |
121 | NL80211_RRF_NO_IBSS | | |
122 | NL80211_RRF_NO_OFDM), | |
123 | /* IEEE 802.11a, channel 36..48 */ | |
ec329ace | 124 | REG_RULE(5180-10, 5240+10, 40, 6, 20, |
611b6a82 LR |
125 | NL80211_RRF_PASSIVE_SCAN | |
126 | NL80211_RRF_NO_IBSS), | |
3fc71f77 LR |
127 | |
128 | /* NB: 5260 MHz - 5700 MHz requies DFS */ | |
129 | ||
130 | /* IEEE 802.11a, channel 149..165 */ | |
ec329ace | 131 | REG_RULE(5745-10, 5825+10, 40, 6, 20, |
3fc71f77 LR |
132 | NL80211_RRF_PASSIVE_SCAN | |
133 | NL80211_RRF_NO_IBSS), | |
734366de JB |
134 | } |
135 | }; | |
136 | ||
a3d2eaf0 JB |
137 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
138 | &world_regdom; | |
734366de | 139 | |
6ee7d330 | 140 | static char *ieee80211_regdom = "00"; |
09d989d1 | 141 | static char user_alpha2[2]; |
6ee7d330 | 142 | |
734366de JB |
143 | module_param(ieee80211_regdom, charp, 0444); |
144 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
145 | ||
734366de JB |
146 | static void reset_regdomains(void) |
147 | { | |
942b25cf JB |
148 | /* avoid freeing static information or freeing something twice */ |
149 | if (cfg80211_regdomain == cfg80211_world_regdom) | |
150 | cfg80211_regdomain = NULL; | |
151 | if (cfg80211_world_regdom == &world_regdom) | |
152 | cfg80211_world_regdom = NULL; | |
153 | if (cfg80211_regdomain == &world_regdom) | |
154 | cfg80211_regdomain = NULL; | |
942b25cf JB |
155 | |
156 | kfree(cfg80211_regdomain); | |
157 | kfree(cfg80211_world_regdom); | |
734366de | 158 | |
a3d2eaf0 | 159 | cfg80211_world_regdom = &world_regdom; |
734366de JB |
160 | cfg80211_regdomain = NULL; |
161 | } | |
162 | ||
fb1fc7ad LR |
163 | /* |
164 | * Dynamic world regulatory domain requested by the wireless | |
165 | * core upon initialization | |
166 | */ | |
a3d2eaf0 | 167 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 168 | { |
f6037d09 | 169 | BUG_ON(!last_request); |
734366de JB |
170 | |
171 | reset_regdomains(); | |
172 | ||
173 | cfg80211_world_regdom = rd; | |
174 | cfg80211_regdomain = rd; | |
175 | } | |
734366de | 176 | |
a3d2eaf0 | 177 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
178 | { |
179 | if (!alpha2) | |
180 | return false; | |
181 | if (alpha2[0] == '0' && alpha2[1] == '0') | |
182 | return true; | |
183 | return false; | |
184 | } | |
8318d78a | 185 | |
a3d2eaf0 | 186 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
187 | { |
188 | if (!alpha2) | |
189 | return false; | |
190 | if (alpha2[0] != 0 && alpha2[1] != 0) | |
191 | return true; | |
192 | return false; | |
193 | } | |
8318d78a | 194 | |
a3d2eaf0 | 195 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
196 | { |
197 | if (!alpha2) | |
198 | return false; | |
fb1fc7ad LR |
199 | /* |
200 | * Special case where regulatory domain was built by driver | |
201 | * but a specific alpha2 cannot be determined | |
202 | */ | |
b2e1b302 LR |
203 | if (alpha2[0] == '9' && alpha2[1] == '9') |
204 | return true; | |
205 | return false; | |
206 | } | |
8318d78a | 207 | |
3f2355cb LR |
208 | static bool is_intersected_alpha2(const char *alpha2) |
209 | { | |
210 | if (!alpha2) | |
211 | return false; | |
fb1fc7ad LR |
212 | /* |
213 | * Special case where regulatory domain is the | |
3f2355cb | 214 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
215 | * structures |
216 | */ | |
3f2355cb LR |
217 | if (alpha2[0] == '9' && alpha2[1] == '8') |
218 | return true; | |
219 | return false; | |
220 | } | |
221 | ||
a3d2eaf0 | 222 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
223 | { |
224 | if (!alpha2) | |
225 | return false; | |
c61029c7 | 226 | if (isalpha(alpha2[0]) && isalpha(alpha2[1])) |
b2e1b302 LR |
227 | return true; |
228 | return false; | |
229 | } | |
8318d78a | 230 | |
a3d2eaf0 | 231 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
232 | { |
233 | if (!alpha2_x || !alpha2_y) | |
234 | return false; | |
235 | if (alpha2_x[0] == alpha2_y[0] && | |
236 | alpha2_x[1] == alpha2_y[1]) | |
237 | return true; | |
238 | return false; | |
239 | } | |
240 | ||
69b1572b | 241 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 242 | { |
761cf7ec LR |
243 | assert_cfg80211_lock(); |
244 | ||
b2e1b302 LR |
245 | if (!cfg80211_regdomain) |
246 | return true; | |
247 | if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) | |
248 | return false; | |
249 | return true; | |
250 | } | |
251 | ||
09d989d1 LR |
252 | /* |
253 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
254 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
255 | * has ever been issued. | |
256 | */ | |
257 | static bool is_user_regdom_saved(void) | |
258 | { | |
259 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
260 | return false; | |
261 | ||
262 | /* This would indicate a mistake on the design */ | |
263 | if (WARN((!is_world_regdom(user_alpha2) && | |
264 | !is_an_alpha2(user_alpha2)), | |
265 | "Unexpected user alpha2: %c%c\n", | |
266 | user_alpha2[0], | |
267 | user_alpha2[1])) | |
268 | return false; | |
269 | ||
270 | return true; | |
271 | } | |
272 | ||
3b377ea9 JL |
273 | static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd, |
274 | const struct ieee80211_regdomain *src_regd) | |
275 | { | |
276 | struct ieee80211_regdomain *regd; | |
277 | int size_of_regd = 0; | |
278 | unsigned int i; | |
279 | ||
280 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
281 | ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule)); | |
282 | ||
283 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
284 | if (!regd) | |
285 | return -ENOMEM; | |
286 | ||
287 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
288 | ||
289 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
290 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
291 | sizeof(struct ieee80211_reg_rule)); | |
292 | ||
293 | *dst_regd = regd; | |
294 | return 0; | |
295 | } | |
296 | ||
297 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB | |
298 | struct reg_regdb_search_request { | |
299 | char alpha2[2]; | |
300 | struct list_head list; | |
301 | }; | |
302 | ||
303 | static LIST_HEAD(reg_regdb_search_list); | |
368d06f5 | 304 | static DEFINE_MUTEX(reg_regdb_search_mutex); |
3b377ea9 JL |
305 | |
306 | static void reg_regdb_search(struct work_struct *work) | |
307 | { | |
308 | struct reg_regdb_search_request *request; | |
309 | const struct ieee80211_regdomain *curdom, *regdom; | |
310 | int i, r; | |
311 | ||
368d06f5 | 312 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 JL |
313 | while (!list_empty(®_regdb_search_list)) { |
314 | request = list_first_entry(®_regdb_search_list, | |
315 | struct reg_regdb_search_request, | |
316 | list); | |
317 | list_del(&request->list); | |
318 | ||
319 | for (i=0; i<reg_regdb_size; i++) { | |
320 | curdom = reg_regdb[i]; | |
321 | ||
322 | if (!memcmp(request->alpha2, curdom->alpha2, 2)) { | |
323 | r = reg_copy_regd(®dom, curdom); | |
324 | if (r) | |
325 | break; | |
3b377ea9 JL |
326 | mutex_lock(&cfg80211_mutex); |
327 | set_regdom(regdom); | |
328 | mutex_unlock(&cfg80211_mutex); | |
3b377ea9 JL |
329 | break; |
330 | } | |
331 | } | |
332 | ||
333 | kfree(request); | |
334 | } | |
368d06f5 | 335 | mutex_unlock(®_regdb_search_mutex); |
3b377ea9 JL |
336 | } |
337 | ||
338 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); | |
339 | ||
340 | static void reg_regdb_query(const char *alpha2) | |
341 | { | |
342 | struct reg_regdb_search_request *request; | |
343 | ||
344 | if (!alpha2) | |
345 | return; | |
346 | ||
347 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); | |
348 | if (!request) | |
349 | return; | |
350 | ||
351 | memcpy(request->alpha2, alpha2, 2); | |
352 | ||
368d06f5 | 353 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 | 354 | list_add_tail(&request->list, ®_regdb_search_list); |
368d06f5 | 355 | mutex_unlock(®_regdb_search_mutex); |
3b377ea9 JL |
356 | |
357 | schedule_work(®_regdb_work); | |
358 | } | |
359 | #else | |
360 | static inline void reg_regdb_query(const char *alpha2) {} | |
361 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ | |
362 | ||
fb1fc7ad LR |
363 | /* |
364 | * This lets us keep regulatory code which is updated on a regulatory | |
365 | * basis in userspace. | |
366 | */ | |
b2e1b302 LR |
367 | static int call_crda(const char *alpha2) |
368 | { | |
369 | char country_env[9 + 2] = "COUNTRY="; | |
370 | char *envp[] = { | |
371 | country_env, | |
372 | NULL | |
373 | }; | |
374 | ||
375 | if (!is_world_regdom((char *) alpha2)) | |
e9c0268f | 376 | pr_info("Calling CRDA for country: %c%c\n", |
b2e1b302 LR |
377 | alpha2[0], alpha2[1]); |
378 | else | |
e9c0268f | 379 | pr_info("Calling CRDA to update world regulatory domain\n"); |
b2e1b302 | 380 | |
3b377ea9 JL |
381 | /* query internal regulatory database (if it exists) */ |
382 | reg_regdb_query(alpha2); | |
383 | ||
b2e1b302 LR |
384 | country_env[8] = alpha2[0]; |
385 | country_env[9] = alpha2[1]; | |
386 | ||
387 | return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, envp); | |
388 | } | |
389 | ||
b2e1b302 | 390 | /* Used by nl80211 before kmalloc'ing our regulatory domain */ |
a3d2eaf0 | 391 | bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 392 | { |
61405e97 LR |
393 | assert_cfg80211_lock(); |
394 | ||
f6037d09 JB |
395 | if (!last_request) |
396 | return false; | |
397 | ||
398 | return alpha2_equal(last_request->alpha2, alpha2); | |
b2e1b302 | 399 | } |
8318d78a | 400 | |
b2e1b302 | 401 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 402 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 403 | { |
a3d2eaf0 | 404 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
405 | u32 freq_diff; |
406 | ||
91e99004 | 407 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
408 | return false; |
409 | ||
410 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
411 | return false; | |
412 | ||
413 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
414 | ||
bd05f28e RK |
415 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
416 | freq_range->max_bandwidth_khz > freq_diff) | |
b2e1b302 LR |
417 | return false; |
418 | ||
419 | return true; | |
420 | } | |
421 | ||
a3d2eaf0 | 422 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 423 | { |
a3d2eaf0 | 424 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 425 | unsigned int i; |
8318d78a | 426 | |
b2e1b302 LR |
427 | if (!rd->n_reg_rules) |
428 | return false; | |
8318d78a | 429 | |
88dc1c3f LR |
430 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
431 | return false; | |
432 | ||
b2e1b302 LR |
433 | for (i = 0; i < rd->n_reg_rules; i++) { |
434 | reg_rule = &rd->reg_rules[i]; | |
435 | if (!is_valid_reg_rule(reg_rule)) | |
436 | return false; | |
437 | } | |
438 | ||
439 | return true; | |
8318d78a JB |
440 | } |
441 | ||
038659e7 LR |
442 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
443 | u32 center_freq_khz, | |
444 | u32 bw_khz) | |
b2e1b302 | 445 | { |
038659e7 LR |
446 | u32 start_freq_khz, end_freq_khz; |
447 | ||
448 | start_freq_khz = center_freq_khz - (bw_khz/2); | |
449 | end_freq_khz = center_freq_khz + (bw_khz/2); | |
450 | ||
451 | if (start_freq_khz >= freq_range->start_freq_khz && | |
452 | end_freq_khz <= freq_range->end_freq_khz) | |
453 | return true; | |
454 | ||
455 | return false; | |
b2e1b302 | 456 | } |
8318d78a | 457 | |
0c7dc45d LR |
458 | /** |
459 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
460 | * @freq_range: frequency rule we want to query | |
461 | * @freq_khz: frequency we are inquiring about | |
462 | * | |
463 | * This lets us know if a specific frequency rule is or is not relevant to | |
464 | * a specific frequency's band. Bands are device specific and artificial | |
465 | * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is | |
466 | * safe for now to assume that a frequency rule should not be part of a | |
467 | * frequency's band if the start freq or end freq are off by more than 2 GHz. | |
468 | * This resolution can be lowered and should be considered as we add | |
469 | * regulatory rule support for other "bands". | |
470 | **/ | |
471 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
472 | u32 freq_khz) | |
473 | { | |
474 | #define ONE_GHZ_IN_KHZ 1000000 | |
475 | if (abs(freq_khz - freq_range->start_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) | |
476 | return true; | |
477 | if (abs(freq_khz - freq_range->end_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) | |
478 | return true; | |
479 | return false; | |
480 | #undef ONE_GHZ_IN_KHZ | |
481 | } | |
482 | ||
fb1fc7ad LR |
483 | /* |
484 | * Helper for regdom_intersect(), this does the real | |
485 | * mathematical intersection fun | |
486 | */ | |
9c96477d LR |
487 | static int reg_rules_intersect( |
488 | const struct ieee80211_reg_rule *rule1, | |
489 | const struct ieee80211_reg_rule *rule2, | |
490 | struct ieee80211_reg_rule *intersected_rule) | |
491 | { | |
492 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
493 | struct ieee80211_freq_range *freq_range; | |
494 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
495 | struct ieee80211_power_rule *power_rule; | |
496 | u32 freq_diff; | |
497 | ||
498 | freq_range1 = &rule1->freq_range; | |
499 | freq_range2 = &rule2->freq_range; | |
500 | freq_range = &intersected_rule->freq_range; | |
501 | ||
502 | power_rule1 = &rule1->power_rule; | |
503 | power_rule2 = &rule2->power_rule; | |
504 | power_rule = &intersected_rule->power_rule; | |
505 | ||
506 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
507 | freq_range2->start_freq_khz); | |
508 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, | |
509 | freq_range2->end_freq_khz); | |
510 | freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, | |
511 | freq_range2->max_bandwidth_khz); | |
512 | ||
513 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
514 | if (freq_range->max_bandwidth_khz > freq_diff) | |
515 | freq_range->max_bandwidth_khz = freq_diff; | |
516 | ||
517 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
518 | power_rule2->max_eirp); | |
519 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
520 | power_rule2->max_antenna_gain); | |
521 | ||
522 | intersected_rule->flags = (rule1->flags | rule2->flags); | |
523 | ||
524 | if (!is_valid_reg_rule(intersected_rule)) | |
525 | return -EINVAL; | |
526 | ||
527 | return 0; | |
528 | } | |
529 | ||
530 | /** | |
531 | * regdom_intersect - do the intersection between two regulatory domains | |
532 | * @rd1: first regulatory domain | |
533 | * @rd2: second regulatory domain | |
534 | * | |
535 | * Use this function to get the intersection between two regulatory domains. | |
536 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
537 | * as no one single alpha2 can represent this regulatory domain. | |
538 | * | |
539 | * Returns a pointer to the regulatory domain structure which will hold the | |
540 | * resulting intersection of rules between rd1 and rd2. We will | |
541 | * kzalloc() this structure for you. | |
542 | */ | |
543 | static struct ieee80211_regdomain *regdom_intersect( | |
544 | const struct ieee80211_regdomain *rd1, | |
545 | const struct ieee80211_regdomain *rd2) | |
546 | { | |
547 | int r, size_of_regd; | |
548 | unsigned int x, y; | |
549 | unsigned int num_rules = 0, rule_idx = 0; | |
550 | const struct ieee80211_reg_rule *rule1, *rule2; | |
551 | struct ieee80211_reg_rule *intersected_rule; | |
552 | struct ieee80211_regdomain *rd; | |
553 | /* This is just a dummy holder to help us count */ | |
554 | struct ieee80211_reg_rule irule; | |
555 | ||
556 | /* Uses the stack temporarily for counter arithmetic */ | |
557 | intersected_rule = &irule; | |
558 | ||
559 | memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); | |
560 | ||
561 | if (!rd1 || !rd2) | |
562 | return NULL; | |
563 | ||
fb1fc7ad LR |
564 | /* |
565 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
566 | * build them. This is to so we can malloc() and free() a |
567 | * regdomain once. The reason we use reg_rules_intersect() here | |
568 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
569 | * All rules that do check out OK are valid. |
570 | */ | |
9c96477d LR |
571 | |
572 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
573 | rule1 = &rd1->reg_rules[x]; | |
574 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
575 | rule2 = &rd2->reg_rules[y]; | |
576 | if (!reg_rules_intersect(rule1, rule2, | |
577 | intersected_rule)) | |
578 | num_rules++; | |
579 | memset(intersected_rule, 0, | |
580 | sizeof(struct ieee80211_reg_rule)); | |
581 | } | |
582 | } | |
583 | ||
584 | if (!num_rules) | |
585 | return NULL; | |
586 | ||
587 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
588 | ((num_rules + 1) * sizeof(struct ieee80211_reg_rule)); | |
589 | ||
590 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
591 | if (!rd) | |
592 | return NULL; | |
593 | ||
594 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
595 | rule1 = &rd1->reg_rules[x]; | |
596 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
597 | rule2 = &rd2->reg_rules[y]; | |
fb1fc7ad LR |
598 | /* |
599 | * This time around instead of using the stack lets | |
9c96477d | 600 | * write to the target rule directly saving ourselves |
fb1fc7ad LR |
601 | * a memcpy() |
602 | */ | |
9c96477d LR |
603 | intersected_rule = &rd->reg_rules[rule_idx]; |
604 | r = reg_rules_intersect(rule1, rule2, | |
605 | intersected_rule); | |
fb1fc7ad LR |
606 | /* |
607 | * No need to memset here the intersected rule here as | |
608 | * we're not using the stack anymore | |
609 | */ | |
9c96477d LR |
610 | if (r) |
611 | continue; | |
612 | rule_idx++; | |
613 | } | |
614 | } | |
615 | ||
616 | if (rule_idx != num_rules) { | |
617 | kfree(rd); | |
618 | return NULL; | |
619 | } | |
620 | ||
621 | rd->n_reg_rules = num_rules; | |
622 | rd->alpha2[0] = '9'; | |
623 | rd->alpha2[1] = '8'; | |
624 | ||
625 | return rd; | |
626 | } | |
627 | ||
fb1fc7ad LR |
628 | /* |
629 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
630 | * want to just have the channel structure use these | |
631 | */ | |
b2e1b302 LR |
632 | static u32 map_regdom_flags(u32 rd_flags) |
633 | { | |
634 | u32 channel_flags = 0; | |
635 | if (rd_flags & NL80211_RRF_PASSIVE_SCAN) | |
636 | channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; | |
637 | if (rd_flags & NL80211_RRF_NO_IBSS) | |
638 | channel_flags |= IEEE80211_CHAN_NO_IBSS; | |
639 | if (rd_flags & NL80211_RRF_DFS) | |
640 | channel_flags |= IEEE80211_CHAN_RADAR; | |
641 | return channel_flags; | |
642 | } | |
643 | ||
1fa25e41 LR |
644 | static int freq_reg_info_regd(struct wiphy *wiphy, |
645 | u32 center_freq, | |
038659e7 | 646 | u32 desired_bw_khz, |
1fa25e41 LR |
647 | const struct ieee80211_reg_rule **reg_rule, |
648 | const struct ieee80211_regdomain *custom_regd) | |
8318d78a JB |
649 | { |
650 | int i; | |
0c7dc45d | 651 | bool band_rule_found = false; |
3e0c3ff3 | 652 | const struct ieee80211_regdomain *regd; |
038659e7 LR |
653 | bool bw_fits = false; |
654 | ||
655 | if (!desired_bw_khz) | |
656 | desired_bw_khz = MHZ_TO_KHZ(20); | |
8318d78a | 657 | |
1fa25e41 | 658 | regd = custom_regd ? custom_regd : cfg80211_regdomain; |
3e0c3ff3 | 659 | |
fb1fc7ad LR |
660 | /* |
661 | * Follow the driver's regulatory domain, if present, unless a country | |
662 | * IE has been processed or a user wants to help complaince further | |
663 | */ | |
2784fe91 LR |
664 | if (!custom_regd && |
665 | last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
7db90f4a | 666 | last_request->initiator != NL80211_REGDOM_SET_BY_USER && |
3e0c3ff3 LR |
667 | wiphy->regd) |
668 | regd = wiphy->regd; | |
669 | ||
670 | if (!regd) | |
b2e1b302 LR |
671 | return -EINVAL; |
672 | ||
3e0c3ff3 | 673 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
674 | const struct ieee80211_reg_rule *rr; |
675 | const struct ieee80211_freq_range *fr = NULL; | |
676 | const struct ieee80211_power_rule *pr = NULL; | |
677 | ||
3e0c3ff3 | 678 | rr = ®d->reg_rules[i]; |
b2e1b302 LR |
679 | fr = &rr->freq_range; |
680 | pr = &rr->power_rule; | |
0c7dc45d | 681 | |
fb1fc7ad LR |
682 | /* |
683 | * We only need to know if one frequency rule was | |
0c7dc45d | 684 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
685 | * not overwrite it once found |
686 | */ | |
0c7dc45d LR |
687 | if (!band_rule_found) |
688 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
689 | ||
038659e7 LR |
690 | bw_fits = reg_does_bw_fit(fr, |
691 | center_freq, | |
692 | desired_bw_khz); | |
0c7dc45d | 693 | |
038659e7 | 694 | if (band_rule_found && bw_fits) { |
b2e1b302 | 695 | *reg_rule = rr; |
038659e7 | 696 | return 0; |
8318d78a JB |
697 | } |
698 | } | |
699 | ||
0c7dc45d LR |
700 | if (!band_rule_found) |
701 | return -ERANGE; | |
702 | ||
038659e7 | 703 | return -EINVAL; |
b2e1b302 LR |
704 | } |
705 | ||
038659e7 LR |
706 | int freq_reg_info(struct wiphy *wiphy, |
707 | u32 center_freq, | |
708 | u32 desired_bw_khz, | |
709 | const struct ieee80211_reg_rule **reg_rule) | |
1fa25e41 | 710 | { |
ac46d48e | 711 | assert_cfg80211_lock(); |
038659e7 LR |
712 | return freq_reg_info_regd(wiphy, |
713 | center_freq, | |
714 | desired_bw_khz, | |
715 | reg_rule, | |
716 | NULL); | |
1fa25e41 | 717 | } |
4f366c5d | 718 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 719 | |
926a0a09 LR |
720 | #ifdef CONFIG_CFG80211_REG_DEBUG |
721 | static const char *reg_initiator_name(enum nl80211_reg_initiator initiator) | |
722 | { | |
723 | switch (initiator) { | |
724 | case NL80211_REGDOM_SET_BY_CORE: | |
725 | return "Set by core"; | |
726 | case NL80211_REGDOM_SET_BY_USER: | |
727 | return "Set by user"; | |
728 | case NL80211_REGDOM_SET_BY_DRIVER: | |
729 | return "Set by driver"; | |
730 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: | |
731 | return "Set by country IE"; | |
732 | default: | |
733 | WARN_ON(1); | |
734 | return "Set by bug"; | |
735 | } | |
736 | } | |
e702d3cf LR |
737 | |
738 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, | |
739 | u32 desired_bw_khz, | |
740 | const struct ieee80211_reg_rule *reg_rule) | |
741 | { | |
742 | const struct ieee80211_power_rule *power_rule; | |
743 | const struct ieee80211_freq_range *freq_range; | |
744 | char max_antenna_gain[32]; | |
745 | ||
746 | power_rule = ®_rule->power_rule; | |
747 | freq_range = ®_rule->freq_range; | |
748 | ||
749 | if (!power_rule->max_antenna_gain) | |
750 | snprintf(max_antenna_gain, 32, "N/A"); | |
751 | else | |
752 | snprintf(max_antenna_gain, 32, "%d", power_rule->max_antenna_gain); | |
753 | ||
d91e41b6 | 754 | REG_DBG_PRINT("Updating information on frequency %d MHz " |
ff039c6f | 755 | "for a %d MHz width channel with regulatory rule:\n", |
e702d3cf LR |
756 | chan->center_freq, |
757 | KHZ_TO_MHZ(desired_bw_khz)); | |
758 | ||
d91e41b6 | 759 | REG_DBG_PRINT("%d KHz - %d KHz @ KHz), (%s mBi, %d mBm)\n", |
e702d3cf LR |
760 | freq_range->start_freq_khz, |
761 | freq_range->end_freq_khz, | |
762 | max_antenna_gain, | |
763 | power_rule->max_eirp); | |
764 | } | |
765 | #else | |
766 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, | |
767 | u32 desired_bw_khz, | |
768 | const struct ieee80211_reg_rule *reg_rule) | |
769 | { | |
770 | return; | |
771 | } | |
926a0a09 LR |
772 | #endif |
773 | ||
038659e7 LR |
774 | /* |
775 | * Note that right now we assume the desired channel bandwidth | |
776 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
777 | * per channel, the primary and the extension channel). To support | |
778 | * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a | |
779 | * new ieee80211_channel.target_bw and re run the regulatory check | |
780 | * on the wiphy with the target_bw specified. Then we can simply use | |
781 | * that below for the desired_bw_khz below. | |
782 | */ | |
7ca43d03 LR |
783 | static void handle_channel(struct wiphy *wiphy, |
784 | enum nl80211_reg_initiator initiator, | |
785 | enum ieee80211_band band, | |
a92a3ce7 | 786 | unsigned int chan_idx) |
b2e1b302 LR |
787 | { |
788 | int r; | |
038659e7 LR |
789 | u32 flags, bw_flags = 0; |
790 | u32 desired_bw_khz = MHZ_TO_KHZ(20); | |
b2e1b302 LR |
791 | const struct ieee80211_reg_rule *reg_rule = NULL; |
792 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 793 | const struct ieee80211_freq_range *freq_range = NULL; |
a92a3ce7 LR |
794 | struct ieee80211_supported_band *sband; |
795 | struct ieee80211_channel *chan; | |
fe33eb39 | 796 | struct wiphy *request_wiphy = NULL; |
a92a3ce7 | 797 | |
761cf7ec LR |
798 | assert_cfg80211_lock(); |
799 | ||
806a9e39 LR |
800 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
801 | ||
a92a3ce7 LR |
802 | sband = wiphy->bands[band]; |
803 | BUG_ON(chan_idx >= sband->n_channels); | |
804 | chan = &sband->channels[chan_idx]; | |
805 | ||
806 | flags = chan->orig_flags; | |
b2e1b302 | 807 | |
038659e7 LR |
808 | r = freq_reg_info(wiphy, |
809 | MHZ_TO_KHZ(chan->center_freq), | |
810 | desired_bw_khz, | |
811 | ®_rule); | |
b2e1b302 | 812 | |
ca4ffe8f LR |
813 | if (r) { |
814 | /* | |
815 | * We will disable all channels that do not match our | |
816 | * recieved regulatory rule unless the hint is coming | |
817 | * from a Country IE and the Country IE had no information | |
818 | * about a band. The IEEE 802.11 spec allows for an AP | |
819 | * to send only a subset of the regulatory rules allowed, | |
820 | * so an AP in the US that only supports 2.4 GHz may only send | |
821 | * a country IE with information for the 2.4 GHz band | |
822 | * while 5 GHz is still supported. | |
823 | */ | |
824 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
825 | r == -ERANGE) | |
826 | return; | |
827 | ||
d91e41b6 | 828 | REG_DBG_PRINT("Disabling freq %d MHz\n", chan->center_freq); |
ca4ffe8f | 829 | chan->flags = IEEE80211_CHAN_DISABLED; |
8318d78a | 830 | return; |
ca4ffe8f | 831 | } |
8318d78a | 832 | |
e702d3cf LR |
833 | chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule); |
834 | ||
b2e1b302 | 835 | power_rule = ®_rule->power_rule; |
038659e7 LR |
836 | freq_range = ®_rule->freq_range; |
837 | ||
838 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
839 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
b2e1b302 | 840 | |
7db90f4a | 841 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 842 | request_wiphy && request_wiphy == wiphy && |
5be83de5 | 843 | request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { |
fb1fc7ad LR |
844 | /* |
845 | * This gaurantees the driver's requested regulatory domain | |
f976376d | 846 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
847 | * settings |
848 | */ | |
f976376d | 849 | chan->flags = chan->orig_flags = |
038659e7 | 850 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
851 | chan->max_antenna_gain = chan->orig_mag = |
852 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
f976376d LR |
853 | chan->max_power = chan->orig_mpwr = |
854 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
855 | return; | |
856 | } | |
857 | ||
038659e7 | 858 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
8318d78a | 859 | chan->max_antenna_gain = min(chan->orig_mag, |
b2e1b302 | 860 | (int) MBI_TO_DBI(power_rule->max_antenna_gain)); |
253898c4 | 861 | if (chan->orig_mpwr) |
b2e1b302 LR |
862 | chan->max_power = min(chan->orig_mpwr, |
863 | (int) MBM_TO_DBM(power_rule->max_eirp)); | |
253898c4 | 864 | else |
b2e1b302 | 865 | chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
8318d78a JB |
866 | } |
867 | ||
7ca43d03 LR |
868 | static void handle_band(struct wiphy *wiphy, |
869 | enum ieee80211_band band, | |
870 | enum nl80211_reg_initiator initiator) | |
8318d78a | 871 | { |
a92a3ce7 LR |
872 | unsigned int i; |
873 | struct ieee80211_supported_band *sband; | |
874 | ||
875 | BUG_ON(!wiphy->bands[band]); | |
876 | sband = wiphy->bands[band]; | |
8318d78a JB |
877 | |
878 | for (i = 0; i < sband->n_channels; i++) | |
7ca43d03 | 879 | handle_channel(wiphy, initiator, band, i); |
8318d78a JB |
880 | } |
881 | ||
7db90f4a LR |
882 | static bool ignore_reg_update(struct wiphy *wiphy, |
883 | enum nl80211_reg_initiator initiator) | |
14b9815a | 884 | { |
926a0a09 | 885 | if (!last_request) { |
d91e41b6 | 886 | REG_DBG_PRINT("Ignoring regulatory request %s since " |
926a0a09 LR |
887 | "last_request is not set\n", |
888 | reg_initiator_name(initiator)); | |
14b9815a | 889 | return true; |
926a0a09 LR |
890 | } |
891 | ||
7db90f4a | 892 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
926a0a09 | 893 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { |
d91e41b6 | 894 | REG_DBG_PRINT("Ignoring regulatory request %s " |
926a0a09 LR |
895 | "since the driver uses its own custom " |
896 | "regulatory domain ", | |
897 | reg_initiator_name(initiator)); | |
14b9815a | 898 | return true; |
926a0a09 LR |
899 | } |
900 | ||
fb1fc7ad LR |
901 | /* |
902 | * wiphy->regd will be set once the device has its own | |
903 | * desired regulatory domain set | |
904 | */ | |
5be83de5 | 905 | if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd && |
749b527b | 906 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
926a0a09 | 907 | !is_world_regdom(last_request->alpha2)) { |
d91e41b6 | 908 | REG_DBG_PRINT("Ignoring regulatory request %s " |
926a0a09 LR |
909 | "since the driver requires its own regulaotry " |
910 | "domain to be set first", | |
911 | reg_initiator_name(initiator)); | |
14b9815a | 912 | return true; |
926a0a09 LR |
913 | } |
914 | ||
14b9815a LR |
915 | return false; |
916 | } | |
917 | ||
7db90f4a | 918 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
8318d78a | 919 | { |
79c97e97 | 920 | struct cfg80211_registered_device *rdev; |
8318d78a | 921 | |
79c97e97 JB |
922 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
923 | wiphy_update_regulatory(&rdev->wiphy, initiator); | |
b2e1b302 LR |
924 | } |
925 | ||
e38f8a7a LR |
926 | static void handle_reg_beacon(struct wiphy *wiphy, |
927 | unsigned int chan_idx, | |
928 | struct reg_beacon *reg_beacon) | |
929 | { | |
e38f8a7a LR |
930 | struct ieee80211_supported_band *sband; |
931 | struct ieee80211_channel *chan; | |
6bad8766 LR |
932 | bool channel_changed = false; |
933 | struct ieee80211_channel chan_before; | |
e38f8a7a LR |
934 | |
935 | assert_cfg80211_lock(); | |
936 | ||
937 | sband = wiphy->bands[reg_beacon->chan.band]; | |
938 | chan = &sband->channels[chan_idx]; | |
939 | ||
940 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
941 | return; | |
942 | ||
6bad8766 LR |
943 | if (chan->beacon_found) |
944 | return; | |
945 | ||
946 | chan->beacon_found = true; | |
947 | ||
5be83de5 | 948 | if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) |
37184244 LR |
949 | return; |
950 | ||
6bad8766 LR |
951 | chan_before.center_freq = chan->center_freq; |
952 | chan_before.flags = chan->flags; | |
953 | ||
37184244 | 954 | if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { |
e38f8a7a | 955 | chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; |
6bad8766 | 956 | channel_changed = true; |
e38f8a7a LR |
957 | } |
958 | ||
37184244 | 959 | if (chan->flags & IEEE80211_CHAN_NO_IBSS) { |
e38f8a7a | 960 | chan->flags &= ~IEEE80211_CHAN_NO_IBSS; |
6bad8766 | 961 | channel_changed = true; |
e38f8a7a LR |
962 | } |
963 | ||
6bad8766 LR |
964 | if (channel_changed) |
965 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
966 | } |
967 | ||
968 | /* | |
969 | * Called when a scan on a wiphy finds a beacon on | |
970 | * new channel | |
971 | */ | |
972 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
973 | struct reg_beacon *reg_beacon) | |
974 | { | |
975 | unsigned int i; | |
976 | struct ieee80211_supported_band *sband; | |
977 | ||
978 | assert_cfg80211_lock(); | |
979 | ||
980 | if (!wiphy->bands[reg_beacon->chan.band]) | |
981 | return; | |
982 | ||
983 | sband = wiphy->bands[reg_beacon->chan.band]; | |
984 | ||
985 | for (i = 0; i < sband->n_channels; i++) | |
986 | handle_reg_beacon(wiphy, i, reg_beacon); | |
987 | } | |
988 | ||
989 | /* | |
990 | * Called upon reg changes or a new wiphy is added | |
991 | */ | |
992 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
993 | { | |
994 | unsigned int i; | |
995 | struct ieee80211_supported_band *sband; | |
996 | struct reg_beacon *reg_beacon; | |
997 | ||
998 | assert_cfg80211_lock(); | |
999 | ||
1000 | if (list_empty(®_beacon_list)) | |
1001 | return; | |
1002 | ||
1003 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { | |
1004 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1005 | continue; | |
1006 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1007 | for (i = 0; i < sband->n_channels; i++) | |
1008 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1009 | } | |
1010 | } | |
1011 | ||
1012 | static bool reg_is_world_roaming(struct wiphy *wiphy) | |
1013 | { | |
1014 | if (is_world_regdom(cfg80211_regdomain->alpha2) || | |
1015 | (wiphy->regd && is_world_regdom(wiphy->regd->alpha2))) | |
1016 | return true; | |
b1ed8ddd LR |
1017 | if (last_request && |
1018 | last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
5be83de5 | 1019 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) |
e38f8a7a LR |
1020 | return true; |
1021 | return false; | |
1022 | } | |
1023 | ||
1024 | /* Reap the advantages of previously found beacons */ | |
1025 | static void reg_process_beacons(struct wiphy *wiphy) | |
1026 | { | |
b1ed8ddd LR |
1027 | /* |
1028 | * Means we are just firing up cfg80211, so no beacons would | |
1029 | * have been processed yet. | |
1030 | */ | |
1031 | if (!last_request) | |
1032 | return; | |
e38f8a7a LR |
1033 | if (!reg_is_world_roaming(wiphy)) |
1034 | return; | |
1035 | wiphy_update_beacon_reg(wiphy); | |
1036 | } | |
1037 | ||
038659e7 LR |
1038 | static bool is_ht40_not_allowed(struct ieee80211_channel *chan) |
1039 | { | |
1040 | if (!chan) | |
1041 | return true; | |
1042 | if (chan->flags & IEEE80211_CHAN_DISABLED) | |
1043 | return true; | |
1044 | /* This would happen when regulatory rules disallow HT40 completely */ | |
1045 | if (IEEE80211_CHAN_NO_HT40 == (chan->flags & (IEEE80211_CHAN_NO_HT40))) | |
1046 | return true; | |
1047 | return false; | |
1048 | } | |
1049 | ||
1050 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
1051 | enum ieee80211_band band, | |
1052 | unsigned int chan_idx) | |
1053 | { | |
1054 | struct ieee80211_supported_band *sband; | |
1055 | struct ieee80211_channel *channel; | |
1056 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; | |
1057 | unsigned int i; | |
1058 | ||
1059 | assert_cfg80211_lock(); | |
1060 | ||
1061 | sband = wiphy->bands[band]; | |
1062 | BUG_ON(chan_idx >= sband->n_channels); | |
1063 | channel = &sband->channels[chan_idx]; | |
1064 | ||
1065 | if (is_ht40_not_allowed(channel)) { | |
1066 | channel->flags |= IEEE80211_CHAN_NO_HT40; | |
1067 | return; | |
1068 | } | |
1069 | ||
1070 | /* | |
1071 | * We need to ensure the extension channels exist to | |
1072 | * be able to use HT40- or HT40+, this finds them (or not) | |
1073 | */ | |
1074 | for (i = 0; i < sband->n_channels; i++) { | |
1075 | struct ieee80211_channel *c = &sband->channels[i]; | |
1076 | if (c->center_freq == (channel->center_freq - 20)) | |
1077 | channel_before = c; | |
1078 | if (c->center_freq == (channel->center_freq + 20)) | |
1079 | channel_after = c; | |
1080 | } | |
1081 | ||
1082 | /* | |
1083 | * Please note that this assumes target bandwidth is 20 MHz, | |
1084 | * if that ever changes we also need to change the below logic | |
1085 | * to include that as well. | |
1086 | */ | |
1087 | if (is_ht40_not_allowed(channel_before)) | |
689da1b3 | 1088 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1089 | else |
689da1b3 | 1090 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 LR |
1091 | |
1092 | if (is_ht40_not_allowed(channel_after)) | |
689da1b3 | 1093 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 1094 | else |
689da1b3 | 1095 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
1096 | } |
1097 | ||
1098 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
1099 | enum ieee80211_band band) | |
1100 | { | |
1101 | unsigned int i; | |
1102 | struct ieee80211_supported_band *sband; | |
1103 | ||
1104 | BUG_ON(!wiphy->bands[band]); | |
1105 | sband = wiphy->bands[band]; | |
1106 | ||
1107 | for (i = 0; i < sband->n_channels; i++) | |
1108 | reg_process_ht_flags_channel(wiphy, band, i); | |
1109 | } | |
1110 | ||
1111 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1112 | { | |
1113 | enum ieee80211_band band; | |
1114 | ||
1115 | if (!wiphy) | |
1116 | return; | |
1117 | ||
1118 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
1119 | if (wiphy->bands[band]) | |
1120 | reg_process_ht_flags_band(wiphy, band); | |
1121 | } | |
1122 | ||
1123 | } | |
1124 | ||
7db90f4a LR |
1125 | void wiphy_update_regulatory(struct wiphy *wiphy, |
1126 | enum nl80211_reg_initiator initiator) | |
b2e1b302 LR |
1127 | { |
1128 | enum ieee80211_band band; | |
d46e5b1d | 1129 | |
7db90f4a | 1130 | if (ignore_reg_update(wiphy, initiator)) |
e38f8a7a | 1131 | goto out; |
b2e1b302 | 1132 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
8318d78a | 1133 | if (wiphy->bands[band]) |
7ca43d03 | 1134 | handle_band(wiphy, band, initiator); |
b2e1b302 | 1135 | } |
e38f8a7a LR |
1136 | out: |
1137 | reg_process_beacons(wiphy); | |
038659e7 | 1138 | reg_process_ht_flags(wiphy); |
560e28e1 | 1139 | if (wiphy->reg_notifier) |
716f9392 | 1140 | wiphy->reg_notifier(wiphy, last_request); |
b2e1b302 LR |
1141 | } |
1142 | ||
1fa25e41 LR |
1143 | static void handle_channel_custom(struct wiphy *wiphy, |
1144 | enum ieee80211_band band, | |
1145 | unsigned int chan_idx, | |
1146 | const struct ieee80211_regdomain *regd) | |
1147 | { | |
1148 | int r; | |
038659e7 LR |
1149 | u32 desired_bw_khz = MHZ_TO_KHZ(20); |
1150 | u32 bw_flags = 0; | |
1fa25e41 LR |
1151 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1152 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1153 | const struct ieee80211_freq_range *freq_range = NULL; |
1fa25e41 LR |
1154 | struct ieee80211_supported_band *sband; |
1155 | struct ieee80211_channel *chan; | |
1156 | ||
abc7381b | 1157 | assert_reg_lock(); |
ac46d48e | 1158 | |
1fa25e41 LR |
1159 | sband = wiphy->bands[band]; |
1160 | BUG_ON(chan_idx >= sband->n_channels); | |
1161 | chan = &sband->channels[chan_idx]; | |
1162 | ||
038659e7 LR |
1163 | r = freq_reg_info_regd(wiphy, |
1164 | MHZ_TO_KHZ(chan->center_freq), | |
1165 | desired_bw_khz, | |
1166 | ®_rule, | |
1167 | regd); | |
1fa25e41 LR |
1168 | |
1169 | if (r) { | |
d91e41b6 | 1170 | REG_DBG_PRINT("Disabling freq %d MHz as custom " |
a6518536 LR |
1171 | "regd has no rule that fits a %d MHz " |
1172 | "wide channel\n", | |
1173 | chan->center_freq, | |
1174 | KHZ_TO_MHZ(desired_bw_khz)); | |
1fa25e41 LR |
1175 | chan->flags = IEEE80211_CHAN_DISABLED; |
1176 | return; | |
1177 | } | |
1178 | ||
e702d3cf LR |
1179 | chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule); |
1180 | ||
1fa25e41 | 1181 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1182 | freq_range = ®_rule->freq_range; |
1183 | ||
1184 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
1185 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
1fa25e41 | 1186 | |
038659e7 | 1187 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
1fa25e41 | 1188 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
1fa25e41 LR |
1189 | chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
1190 | } | |
1191 | ||
1192 | static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band, | |
1193 | const struct ieee80211_regdomain *regd) | |
1194 | { | |
1195 | unsigned int i; | |
1196 | struct ieee80211_supported_band *sband; | |
1197 | ||
1198 | BUG_ON(!wiphy->bands[band]); | |
1199 | sband = wiphy->bands[band]; | |
1200 | ||
1201 | for (i = 0; i < sband->n_channels; i++) | |
1202 | handle_channel_custom(wiphy, band, i, regd); | |
1203 | } | |
1204 | ||
1205 | /* Used by drivers prior to wiphy registration */ | |
1206 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1207 | const struct ieee80211_regdomain *regd) | |
1208 | { | |
1209 | enum ieee80211_band band; | |
bbcf3f02 | 1210 | unsigned int bands_set = 0; |
ac46d48e | 1211 | |
abc7381b | 1212 | mutex_lock(®_mutex); |
1fa25e41 | 1213 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
bbcf3f02 LR |
1214 | if (!wiphy->bands[band]) |
1215 | continue; | |
1216 | handle_band_custom(wiphy, band, regd); | |
1217 | bands_set++; | |
b2e1b302 | 1218 | } |
abc7381b | 1219 | mutex_unlock(®_mutex); |
bbcf3f02 LR |
1220 | |
1221 | /* | |
1222 | * no point in calling this if it won't have any effect | |
1223 | * on your device's supportd bands. | |
1224 | */ | |
1225 | WARN_ON(!bands_set); | |
b2e1b302 | 1226 | } |
1fa25e41 LR |
1227 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1228 | ||
fb1fc7ad LR |
1229 | /* |
1230 | * Return value which can be used by ignore_request() to indicate | |
1231 | * it has been determined we should intersect two regulatory domains | |
1232 | */ | |
9c96477d LR |
1233 | #define REG_INTERSECT 1 |
1234 | ||
84fa4f43 JB |
1235 | /* This has the logic which determines when a new request |
1236 | * should be ignored. */ | |
2f92cd2e LR |
1237 | static int ignore_request(struct wiphy *wiphy, |
1238 | struct regulatory_request *pending_request) | |
84fa4f43 | 1239 | { |
806a9e39 | 1240 | struct wiphy *last_wiphy = NULL; |
761cf7ec LR |
1241 | |
1242 | assert_cfg80211_lock(); | |
1243 | ||
84fa4f43 JB |
1244 | /* All initial requests are respected */ |
1245 | if (!last_request) | |
1246 | return 0; | |
1247 | ||
2f92cd2e | 1248 | switch (pending_request->initiator) { |
7db90f4a | 1249 | case NL80211_REGDOM_SET_BY_CORE: |
09d989d1 | 1250 | return 0; |
7db90f4a | 1251 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
806a9e39 LR |
1252 | |
1253 | last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); | |
1254 | ||
2f92cd2e | 1255 | if (unlikely(!is_an_alpha2(pending_request->alpha2))) |
84fa4f43 | 1256 | return -EINVAL; |
7db90f4a LR |
1257 | if (last_request->initiator == |
1258 | NL80211_REGDOM_SET_BY_COUNTRY_IE) { | |
806a9e39 | 1259 | if (last_wiphy != wiphy) { |
84fa4f43 JB |
1260 | /* |
1261 | * Two cards with two APs claiming different | |
1fe90b03 | 1262 | * Country IE alpha2s. We could |
84fa4f43 JB |
1263 | * intersect them, but that seems unlikely |
1264 | * to be correct. Reject second one for now. | |
1265 | */ | |
2f92cd2e | 1266 | if (regdom_changes(pending_request->alpha2)) |
84fa4f43 JB |
1267 | return -EOPNOTSUPP; |
1268 | return -EALREADY; | |
1269 | } | |
fb1fc7ad LR |
1270 | /* |
1271 | * Two consecutive Country IE hints on the same wiphy. | |
1272 | * This should be picked up early by the driver/stack | |
1273 | */ | |
2f92cd2e | 1274 | if (WARN_ON(regdom_changes(pending_request->alpha2))) |
84fa4f43 JB |
1275 | return 0; |
1276 | return -EALREADY; | |
1277 | } | |
a171fba4 | 1278 | return 0; |
7db90f4a LR |
1279 | case NL80211_REGDOM_SET_BY_DRIVER: |
1280 | if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) { | |
2f92cd2e | 1281 | if (regdom_changes(pending_request->alpha2)) |
e74b1e7f | 1282 | return 0; |
84fa4f43 | 1283 | return -EALREADY; |
e74b1e7f | 1284 | } |
fff32c04 LR |
1285 | |
1286 | /* | |
1287 | * This would happen if you unplug and plug your card | |
1288 | * back in or if you add a new device for which the previously | |
1289 | * loaded card also agrees on the regulatory domain. | |
1290 | */ | |
7db90f4a | 1291 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
2f92cd2e | 1292 | !regdom_changes(pending_request->alpha2)) |
fff32c04 LR |
1293 | return -EALREADY; |
1294 | ||
3e0c3ff3 | 1295 | return REG_INTERSECT; |
7db90f4a LR |
1296 | case NL80211_REGDOM_SET_BY_USER: |
1297 | if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
9c96477d | 1298 | return REG_INTERSECT; |
fb1fc7ad LR |
1299 | /* |
1300 | * If the user knows better the user should set the regdom | |
1301 | * to their country before the IE is picked up | |
1302 | */ | |
7db90f4a | 1303 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER && |
3f2355cb LR |
1304 | last_request->intersect) |
1305 | return -EOPNOTSUPP; | |
fb1fc7ad LR |
1306 | /* |
1307 | * Process user requests only after previous user/driver/core | |
1308 | * requests have been processed | |
1309 | */ | |
7db90f4a LR |
1310 | if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE || |
1311 | last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1312 | last_request->initiator == NL80211_REGDOM_SET_BY_USER) { | |
69b1572b | 1313 | if (regdom_changes(last_request->alpha2)) |
5eebade6 LR |
1314 | return -EAGAIN; |
1315 | } | |
1316 | ||
baeb66fe | 1317 | if (!regdom_changes(pending_request->alpha2)) |
e74b1e7f LR |
1318 | return -EALREADY; |
1319 | ||
84fa4f43 JB |
1320 | return 0; |
1321 | } | |
1322 | ||
1323 | return -EINVAL; | |
1324 | } | |
1325 | ||
b2e253cf LR |
1326 | static void reg_set_request_processed(void) |
1327 | { | |
1328 | bool need_more_processing = false; | |
1329 | ||
1330 | last_request->processed = true; | |
1331 | ||
1332 | spin_lock(®_requests_lock); | |
1333 | if (!list_empty(®_requests_list)) | |
1334 | need_more_processing = true; | |
1335 | spin_unlock(®_requests_lock); | |
1336 | ||
1337 | if (need_more_processing) | |
1338 | schedule_work(®_work); | |
1339 | } | |
1340 | ||
d1c96a9a LR |
1341 | /** |
1342 | * __regulatory_hint - hint to the wireless core a regulatory domain | |
1343 | * @wiphy: if the hint comes from country information from an AP, this | |
1344 | * is required to be set to the wiphy that received the information | |
28da32d7 | 1345 | * @pending_request: the regulatory request currently being processed |
d1c96a9a LR |
1346 | * |
1347 | * The Wireless subsystem can use this function to hint to the wireless core | |
28da32d7 | 1348 | * what it believes should be the current regulatory domain. |
d1c96a9a LR |
1349 | * |
1350 | * Returns zero if all went fine, %-EALREADY if a regulatory domain had | |
1351 | * already been set or other standard error codes. | |
1352 | * | |
abc7381b | 1353 | * Caller must hold &cfg80211_mutex and ®_mutex |
d1c96a9a | 1354 | */ |
28da32d7 LR |
1355 | static int __regulatory_hint(struct wiphy *wiphy, |
1356 | struct regulatory_request *pending_request) | |
b2e1b302 | 1357 | { |
9c96477d | 1358 | bool intersect = false; |
b2e1b302 LR |
1359 | int r = 0; |
1360 | ||
761cf7ec LR |
1361 | assert_cfg80211_lock(); |
1362 | ||
2f92cd2e | 1363 | r = ignore_request(wiphy, pending_request); |
9c96477d | 1364 | |
3e0c3ff3 | 1365 | if (r == REG_INTERSECT) { |
7db90f4a LR |
1366 | if (pending_request->initiator == |
1367 | NL80211_REGDOM_SET_BY_DRIVER) { | |
3e0c3ff3 | 1368 | r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); |
d951c1dd LR |
1369 | if (r) { |
1370 | kfree(pending_request); | |
3e0c3ff3 | 1371 | return r; |
d951c1dd | 1372 | } |
3e0c3ff3 | 1373 | } |
9c96477d | 1374 | intersect = true; |
3e0c3ff3 | 1375 | } else if (r) { |
fb1fc7ad LR |
1376 | /* |
1377 | * If the regulatory domain being requested by the | |
3e0c3ff3 | 1378 | * driver has already been set just copy it to the |
fb1fc7ad LR |
1379 | * wiphy |
1380 | */ | |
28da32d7 | 1381 | if (r == -EALREADY && |
7db90f4a LR |
1382 | pending_request->initiator == |
1383 | NL80211_REGDOM_SET_BY_DRIVER) { | |
3e0c3ff3 | 1384 | r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); |
d951c1dd LR |
1385 | if (r) { |
1386 | kfree(pending_request); | |
3e0c3ff3 | 1387 | return r; |
d951c1dd | 1388 | } |
3e0c3ff3 LR |
1389 | r = -EALREADY; |
1390 | goto new_request; | |
1391 | } | |
d951c1dd | 1392 | kfree(pending_request); |
b2e1b302 | 1393 | return r; |
3e0c3ff3 | 1394 | } |
b2e1b302 | 1395 | |
3e0c3ff3 | 1396 | new_request: |
d951c1dd | 1397 | kfree(last_request); |
5203cdb6 | 1398 | |
d951c1dd LR |
1399 | last_request = pending_request; |
1400 | last_request->intersect = intersect; | |
5203cdb6 | 1401 | |
d951c1dd | 1402 | pending_request = NULL; |
3e0c3ff3 | 1403 | |
09d989d1 LR |
1404 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) { |
1405 | user_alpha2[0] = last_request->alpha2[0]; | |
1406 | user_alpha2[1] = last_request->alpha2[1]; | |
1407 | } | |
1408 | ||
3e0c3ff3 | 1409 | /* When r == REG_INTERSECT we do need to call CRDA */ |
73d54c9e LR |
1410 | if (r < 0) { |
1411 | /* | |
1412 | * Since CRDA will not be called in this case as we already | |
1413 | * have applied the requested regulatory domain before we just | |
1414 | * inform userspace we have processed the request | |
1415 | */ | |
b2e253cf | 1416 | if (r == -EALREADY) { |
73d54c9e | 1417 | nl80211_send_reg_change_event(last_request); |
b2e253cf LR |
1418 | reg_set_request_processed(); |
1419 | } | |
3e0c3ff3 | 1420 | return r; |
73d54c9e | 1421 | } |
3e0c3ff3 | 1422 | |
d951c1dd | 1423 | return call_crda(last_request->alpha2); |
b2e1b302 LR |
1424 | } |
1425 | ||
30a548c7 | 1426 | /* This processes *all* regulatory hints */ |
d951c1dd | 1427 | static void reg_process_hint(struct regulatory_request *reg_request) |
fe33eb39 LR |
1428 | { |
1429 | int r = 0; | |
1430 | struct wiphy *wiphy = NULL; | |
c4c32294 | 1431 | enum nl80211_reg_initiator initiator = reg_request->initiator; |
fe33eb39 LR |
1432 | |
1433 | BUG_ON(!reg_request->alpha2); | |
1434 | ||
fe33eb39 LR |
1435 | if (wiphy_idx_valid(reg_request->wiphy_idx)) |
1436 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); | |
1437 | ||
7db90f4a | 1438 | if (reg_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
fe33eb39 | 1439 | !wiphy) { |
d951c1dd | 1440 | kfree(reg_request); |
b0e2880b | 1441 | return; |
fe33eb39 LR |
1442 | } |
1443 | ||
28da32d7 | 1444 | r = __regulatory_hint(wiphy, reg_request); |
fe33eb39 | 1445 | /* This is required so that the orig_* parameters are saved */ |
5be83de5 JB |
1446 | if (r == -EALREADY && wiphy && |
1447 | wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) | |
c4c32294 | 1448 | wiphy_update_regulatory(wiphy, initiator); |
fe33eb39 LR |
1449 | } |
1450 | ||
b2e253cf LR |
1451 | /* |
1452 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
1453 | * Regulatory hints come on a first come first serve basis and we | |
1454 | * must process each one atomically. | |
1455 | */ | |
fe33eb39 | 1456 | static void reg_process_pending_hints(void) |
b0e2880b | 1457 | { |
fe33eb39 | 1458 | struct regulatory_request *reg_request; |
fe33eb39 | 1459 | |
b0e2880b LR |
1460 | mutex_lock(&cfg80211_mutex); |
1461 | mutex_lock(®_mutex); | |
1462 | ||
b2e253cf LR |
1463 | /* When last_request->processed becomes true this will be rescheduled */ |
1464 | if (last_request && !last_request->processed) { | |
1465 | REG_DBG_PRINT("Pending regulatory request, waiting " | |
1466 | "for it to be processed..."); | |
1467 | goto out; | |
1468 | } | |
1469 | ||
fe33eb39 | 1470 | spin_lock(®_requests_lock); |
fe33eb39 | 1471 | |
b2e253cf | 1472 | if (list_empty(®_requests_list)) { |
d951c1dd | 1473 | spin_unlock(®_requests_lock); |
b2e253cf | 1474 | goto out; |
fe33eb39 | 1475 | } |
b2e253cf LR |
1476 | |
1477 | reg_request = list_first_entry(®_requests_list, | |
1478 | struct regulatory_request, | |
1479 | list); | |
1480 | list_del_init(®_request->list); | |
1481 | ||
fe33eb39 | 1482 | spin_unlock(®_requests_lock); |
b0e2880b | 1483 | |
b2e253cf LR |
1484 | reg_process_hint(reg_request); |
1485 | ||
1486 | out: | |
b0e2880b LR |
1487 | mutex_unlock(®_mutex); |
1488 | mutex_unlock(&cfg80211_mutex); | |
fe33eb39 LR |
1489 | } |
1490 | ||
e38f8a7a LR |
1491 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
1492 | static void reg_process_pending_beacon_hints(void) | |
1493 | { | |
79c97e97 | 1494 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
1495 | struct reg_beacon *pending_beacon, *tmp; |
1496 | ||
abc7381b LR |
1497 | /* |
1498 | * No need to hold the reg_mutex here as we just touch wiphys | |
1499 | * and do not read or access regulatory variables. | |
1500 | */ | |
e38f8a7a LR |
1501 | mutex_lock(&cfg80211_mutex); |
1502 | ||
1503 | /* This goes through the _pending_ beacon list */ | |
1504 | spin_lock_bh(®_pending_beacons_lock); | |
1505 | ||
1506 | if (list_empty(®_pending_beacons)) { | |
1507 | spin_unlock_bh(®_pending_beacons_lock); | |
1508 | goto out; | |
1509 | } | |
1510 | ||
1511 | list_for_each_entry_safe(pending_beacon, tmp, | |
1512 | ®_pending_beacons, list) { | |
1513 | ||
1514 | list_del_init(&pending_beacon->list); | |
1515 | ||
1516 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
1517 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
1518 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
1519 | |
1520 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
1521 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
1522 | } | |
1523 | ||
1524 | spin_unlock_bh(®_pending_beacons_lock); | |
1525 | out: | |
1526 | mutex_unlock(&cfg80211_mutex); | |
1527 | } | |
1528 | ||
fe33eb39 LR |
1529 | static void reg_todo(struct work_struct *work) |
1530 | { | |
1531 | reg_process_pending_hints(); | |
e38f8a7a | 1532 | reg_process_pending_beacon_hints(); |
fe33eb39 LR |
1533 | } |
1534 | ||
fe33eb39 LR |
1535 | static void queue_regulatory_request(struct regulatory_request *request) |
1536 | { | |
c61029c7 JL |
1537 | if (isalpha(request->alpha2[0])) |
1538 | request->alpha2[0] = toupper(request->alpha2[0]); | |
1539 | if (isalpha(request->alpha2[1])) | |
1540 | request->alpha2[1] = toupper(request->alpha2[1]); | |
1541 | ||
fe33eb39 LR |
1542 | spin_lock(®_requests_lock); |
1543 | list_add_tail(&request->list, ®_requests_list); | |
1544 | spin_unlock(®_requests_lock); | |
1545 | ||
1546 | schedule_work(®_work); | |
1547 | } | |
1548 | ||
09d989d1 LR |
1549 | /* |
1550 | * Core regulatory hint -- happens during cfg80211_init() | |
1551 | * and when we restore regulatory settings. | |
1552 | */ | |
ba25c141 LR |
1553 | static int regulatory_hint_core(const char *alpha2) |
1554 | { | |
1555 | struct regulatory_request *request; | |
1556 | ||
09d989d1 LR |
1557 | kfree(last_request); |
1558 | last_request = NULL; | |
ba25c141 LR |
1559 | |
1560 | request = kzalloc(sizeof(struct regulatory_request), | |
1561 | GFP_KERNEL); | |
1562 | if (!request) | |
1563 | return -ENOMEM; | |
1564 | ||
1565 | request->alpha2[0] = alpha2[0]; | |
1566 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1567 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 1568 | |
31e99729 | 1569 | queue_regulatory_request(request); |
5078b2e3 | 1570 | |
fe33eb39 | 1571 | return 0; |
ba25c141 LR |
1572 | } |
1573 | ||
fe33eb39 LR |
1574 | /* User hints */ |
1575 | int regulatory_hint_user(const char *alpha2) | |
b2e1b302 | 1576 | { |
fe33eb39 LR |
1577 | struct regulatory_request *request; |
1578 | ||
be3d4810 | 1579 | BUG_ON(!alpha2); |
b2e1b302 | 1580 | |
fe33eb39 LR |
1581 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1582 | if (!request) | |
1583 | return -ENOMEM; | |
1584 | ||
1585 | request->wiphy_idx = WIPHY_IDX_STALE; | |
1586 | request->alpha2[0] = alpha2[0]; | |
1587 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 1588 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
fe33eb39 LR |
1589 | |
1590 | queue_regulatory_request(request); | |
1591 | ||
1592 | return 0; | |
1593 | } | |
1594 | ||
1595 | /* Driver hints */ | |
1596 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
1597 | { | |
1598 | struct regulatory_request *request; | |
1599 | ||
1600 | BUG_ON(!alpha2); | |
1601 | BUG_ON(!wiphy); | |
1602 | ||
1603 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); | |
1604 | if (!request) | |
1605 | return -ENOMEM; | |
1606 | ||
1607 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
1608 | ||
1609 | /* Must have registered wiphy first */ | |
1610 | BUG_ON(!wiphy_idx_valid(request->wiphy_idx)); | |
1611 | ||
1612 | request->alpha2[0] = alpha2[0]; | |
1613 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1614 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 LR |
1615 | |
1616 | queue_regulatory_request(request); | |
1617 | ||
1618 | return 0; | |
b2e1b302 LR |
1619 | } |
1620 | EXPORT_SYMBOL(regulatory_hint); | |
1621 | ||
4b44c8bc LR |
1622 | /* |
1623 | * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and | |
1624 | * therefore cannot iterate over the rdev list here. | |
1625 | */ | |
3f2355cb | 1626 | void regulatory_hint_11d(struct wiphy *wiphy, |
84920e3e LR |
1627 | enum ieee80211_band band, |
1628 | u8 *country_ie, | |
1629 | u8 country_ie_len) | |
3f2355cb | 1630 | { |
3f2355cb | 1631 | char alpha2[2]; |
3f2355cb | 1632 | enum environment_cap env = ENVIRON_ANY; |
fe33eb39 | 1633 | struct regulatory_request *request; |
3f2355cb | 1634 | |
abc7381b | 1635 | mutex_lock(®_mutex); |
3f2355cb | 1636 | |
9828b017 LR |
1637 | if (unlikely(!last_request)) |
1638 | goto out; | |
d335fe63 | 1639 | |
3f2355cb LR |
1640 | /* IE len must be evenly divisible by 2 */ |
1641 | if (country_ie_len & 0x01) | |
1642 | goto out; | |
1643 | ||
1644 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
1645 | goto out; | |
1646 | ||
3f2355cb LR |
1647 | alpha2[0] = country_ie[0]; |
1648 | alpha2[1] = country_ie[1]; | |
1649 | ||
1650 | if (country_ie[2] == 'I') | |
1651 | env = ENVIRON_INDOOR; | |
1652 | else if (country_ie[2] == 'O') | |
1653 | env = ENVIRON_OUTDOOR; | |
1654 | ||
fb1fc7ad | 1655 | /* |
8b19e6ca | 1656 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc LR |
1657 | * We leave conflict resolution to the workqueue, where can hold |
1658 | * cfg80211_mutex. | |
fb1fc7ad | 1659 | */ |
cc0b6fe8 LR |
1660 | if (likely(last_request->initiator == |
1661 | NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
4b44c8bc LR |
1662 | wiphy_idx_valid(last_request->wiphy_idx))) |
1663 | goto out; | |
3f2355cb | 1664 | |
fe33eb39 LR |
1665 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1666 | if (!request) | |
f9f9b6e3 | 1667 | goto out; |
fe33eb39 | 1668 | |
fe33eb39 | 1669 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
1670 | request->alpha2[0] = alpha2[0]; |
1671 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1672 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
1673 | request->country_ie_env = env; |
1674 | ||
abc7381b | 1675 | mutex_unlock(®_mutex); |
3f2355cb | 1676 | |
fe33eb39 LR |
1677 | queue_regulatory_request(request); |
1678 | ||
1679 | return; | |
0441d6ff | 1680 | |
3f2355cb | 1681 | out: |
abc7381b | 1682 | mutex_unlock(®_mutex); |
3f2355cb | 1683 | } |
b2e1b302 | 1684 | |
09d989d1 LR |
1685 | static void restore_alpha2(char *alpha2, bool reset_user) |
1686 | { | |
1687 | /* indicates there is no alpha2 to consider for restoration */ | |
1688 | alpha2[0] = '9'; | |
1689 | alpha2[1] = '7'; | |
1690 | ||
1691 | /* The user setting has precedence over the module parameter */ | |
1692 | if (is_user_regdom_saved()) { | |
1693 | /* Unless we're asked to ignore it and reset it */ | |
1694 | if (reset_user) { | |
d91e41b6 | 1695 | REG_DBG_PRINT("Restoring regulatory settings " |
09d989d1 LR |
1696 | "including user preference\n"); |
1697 | user_alpha2[0] = '9'; | |
1698 | user_alpha2[1] = '7'; | |
1699 | ||
1700 | /* | |
1701 | * If we're ignoring user settings, we still need to | |
1702 | * check the module parameter to ensure we put things | |
1703 | * back as they were for a full restore. | |
1704 | */ | |
1705 | if (!is_world_regdom(ieee80211_regdom)) { | |
d91e41b6 | 1706 | REG_DBG_PRINT("Keeping preference on " |
09d989d1 LR |
1707 | "module parameter ieee80211_regdom: %c%c\n", |
1708 | ieee80211_regdom[0], | |
1709 | ieee80211_regdom[1]); | |
1710 | alpha2[0] = ieee80211_regdom[0]; | |
1711 | alpha2[1] = ieee80211_regdom[1]; | |
1712 | } | |
1713 | } else { | |
d91e41b6 | 1714 | REG_DBG_PRINT("Restoring regulatory settings " |
09d989d1 LR |
1715 | "while preserving user preference for: %c%c\n", |
1716 | user_alpha2[0], | |
1717 | user_alpha2[1]); | |
1718 | alpha2[0] = user_alpha2[0]; | |
1719 | alpha2[1] = user_alpha2[1]; | |
1720 | } | |
1721 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
d91e41b6 | 1722 | REG_DBG_PRINT("Keeping preference on " |
09d989d1 LR |
1723 | "module parameter ieee80211_regdom: %c%c\n", |
1724 | ieee80211_regdom[0], | |
1725 | ieee80211_regdom[1]); | |
1726 | alpha2[0] = ieee80211_regdom[0]; | |
1727 | alpha2[1] = ieee80211_regdom[1]; | |
1728 | } else | |
d91e41b6 | 1729 | REG_DBG_PRINT("Restoring regulatory settings\n"); |
09d989d1 LR |
1730 | } |
1731 | ||
1732 | /* | |
1733 | * Restoring regulatory settings involves ingoring any | |
1734 | * possibly stale country IE information and user regulatory | |
1735 | * settings if so desired, this includes any beacon hints | |
1736 | * learned as we could have traveled outside to another country | |
1737 | * after disconnection. To restore regulatory settings we do | |
1738 | * exactly what we did at bootup: | |
1739 | * | |
1740 | * - send a core regulatory hint | |
1741 | * - send a user regulatory hint if applicable | |
1742 | * | |
1743 | * Device drivers that send a regulatory hint for a specific country | |
1744 | * keep their own regulatory domain on wiphy->regd so that does does | |
1745 | * not need to be remembered. | |
1746 | */ | |
1747 | static void restore_regulatory_settings(bool reset_user) | |
1748 | { | |
1749 | char alpha2[2]; | |
1750 | struct reg_beacon *reg_beacon, *btmp; | |
1751 | ||
1752 | mutex_lock(&cfg80211_mutex); | |
1753 | mutex_lock(®_mutex); | |
1754 | ||
1755 | reset_regdomains(); | |
1756 | restore_alpha2(alpha2, reset_user); | |
1757 | ||
1758 | /* Clear beacon hints */ | |
1759 | spin_lock_bh(®_pending_beacons_lock); | |
1760 | if (!list_empty(®_pending_beacons)) { | |
1761 | list_for_each_entry_safe(reg_beacon, btmp, | |
1762 | ®_pending_beacons, list) { | |
1763 | list_del(®_beacon->list); | |
1764 | kfree(reg_beacon); | |
1765 | } | |
1766 | } | |
1767 | spin_unlock_bh(®_pending_beacons_lock); | |
1768 | ||
1769 | if (!list_empty(®_beacon_list)) { | |
1770 | list_for_each_entry_safe(reg_beacon, btmp, | |
1771 | ®_beacon_list, list) { | |
1772 | list_del(®_beacon->list); | |
1773 | kfree(reg_beacon); | |
1774 | } | |
1775 | } | |
1776 | ||
1777 | /* First restore to the basic regulatory settings */ | |
1778 | cfg80211_regdomain = cfg80211_world_regdom; | |
1779 | ||
1780 | mutex_unlock(®_mutex); | |
1781 | mutex_unlock(&cfg80211_mutex); | |
1782 | ||
1783 | regulatory_hint_core(cfg80211_regdomain->alpha2); | |
1784 | ||
1785 | /* | |
1786 | * This restores the ieee80211_regdom module parameter | |
1787 | * preference or the last user requested regulatory | |
1788 | * settings, user regulatory settings takes precedence. | |
1789 | */ | |
1790 | if (is_an_alpha2(alpha2)) | |
1791 | regulatory_hint_user(user_alpha2); | |
1792 | } | |
1793 | ||
1794 | ||
1795 | void regulatory_hint_disconnect(void) | |
1796 | { | |
d91e41b6 | 1797 | REG_DBG_PRINT("All devices are disconnected, going to " |
09d989d1 LR |
1798 | "restore regulatory settings\n"); |
1799 | restore_regulatory_settings(false); | |
1800 | } | |
1801 | ||
e38f8a7a LR |
1802 | static bool freq_is_chan_12_13_14(u16 freq) |
1803 | { | |
1804 | if (freq == ieee80211_channel_to_frequency(12) || | |
1805 | freq == ieee80211_channel_to_frequency(13) || | |
1806 | freq == ieee80211_channel_to_frequency(14)) | |
1807 | return true; | |
1808 | return false; | |
1809 | } | |
1810 | ||
1811 | int regulatory_hint_found_beacon(struct wiphy *wiphy, | |
1812 | struct ieee80211_channel *beacon_chan, | |
1813 | gfp_t gfp) | |
1814 | { | |
1815 | struct reg_beacon *reg_beacon; | |
1816 | ||
1817 | if (likely((beacon_chan->beacon_found || | |
1818 | (beacon_chan->flags & IEEE80211_CHAN_RADAR) || | |
1819 | (beacon_chan->band == IEEE80211_BAND_2GHZ && | |
1820 | !freq_is_chan_12_13_14(beacon_chan->center_freq))))) | |
1821 | return 0; | |
1822 | ||
1823 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
1824 | if (!reg_beacon) | |
1825 | return -ENOMEM; | |
1826 | ||
d91e41b6 | 1827 | REG_DBG_PRINT("Found new beacon on " |
4113f751 LR |
1828 | "frequency: %d MHz (Ch %d) on %s\n", |
1829 | beacon_chan->center_freq, | |
1830 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
1831 | wiphy_name(wiphy)); | |
1832 | ||
e38f8a7a LR |
1833 | memcpy(®_beacon->chan, beacon_chan, |
1834 | sizeof(struct ieee80211_channel)); | |
1835 | ||
1836 | ||
1837 | /* | |
1838 | * Since we can be called from BH or and non-BH context | |
1839 | * we must use spin_lock_bh() | |
1840 | */ | |
1841 | spin_lock_bh(®_pending_beacons_lock); | |
1842 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
1843 | spin_unlock_bh(®_pending_beacons_lock); | |
1844 | ||
1845 | schedule_work(®_work); | |
1846 | ||
1847 | return 0; | |
1848 | } | |
1849 | ||
a3d2eaf0 | 1850 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
1851 | { |
1852 | unsigned int i; | |
a3d2eaf0 JB |
1853 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1854 | const struct ieee80211_freq_range *freq_range = NULL; | |
1855 | const struct ieee80211_power_rule *power_rule = NULL; | |
b2e1b302 | 1856 | |
e9c0268f | 1857 | pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n"); |
b2e1b302 LR |
1858 | |
1859 | for (i = 0; i < rd->n_reg_rules; i++) { | |
1860 | reg_rule = &rd->reg_rules[i]; | |
1861 | freq_range = ®_rule->freq_range; | |
1862 | power_rule = ®_rule->power_rule; | |
1863 | ||
fb1fc7ad LR |
1864 | /* |
1865 | * There may not be documentation for max antenna gain | |
1866 | * in certain regions | |
1867 | */ | |
b2e1b302 | 1868 | if (power_rule->max_antenna_gain) |
e9c0268f | 1869 | pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n", |
b2e1b302 LR |
1870 | freq_range->start_freq_khz, |
1871 | freq_range->end_freq_khz, | |
1872 | freq_range->max_bandwidth_khz, | |
1873 | power_rule->max_antenna_gain, | |
1874 | power_rule->max_eirp); | |
1875 | else | |
e9c0268f | 1876 | pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n", |
b2e1b302 LR |
1877 | freq_range->start_freq_khz, |
1878 | freq_range->end_freq_khz, | |
1879 | freq_range->max_bandwidth_khz, | |
1880 | power_rule->max_eirp); | |
1881 | } | |
1882 | } | |
1883 | ||
a3d2eaf0 | 1884 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
1885 | { |
1886 | ||
3f2355cb | 1887 | if (is_intersected_alpha2(rd->alpha2)) { |
3f2355cb | 1888 | |
7db90f4a LR |
1889 | if (last_request->initiator == |
1890 | NL80211_REGDOM_SET_BY_COUNTRY_IE) { | |
79c97e97 JB |
1891 | struct cfg80211_registered_device *rdev; |
1892 | rdev = cfg80211_rdev_by_wiphy_idx( | |
806a9e39 | 1893 | last_request->wiphy_idx); |
79c97e97 | 1894 | if (rdev) { |
e9c0268f | 1895 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
1896 | rdev->country_ie_alpha2[0], |
1897 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 1898 | } else |
e9c0268f | 1899 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 1900 | } else |
e9c0268f | 1901 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 1902 | } else if (is_world_regdom(rd->alpha2)) |
e9c0268f | 1903 | pr_info("World regulatory domain updated:\n"); |
b2e1b302 LR |
1904 | else { |
1905 | if (is_unknown_alpha2(rd->alpha2)) | |
e9c0268f | 1906 | pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
b2e1b302 | 1907 | else |
e9c0268f | 1908 | pr_info("Regulatory domain changed to country: %c%c\n", |
b2e1b302 LR |
1909 | rd->alpha2[0], rd->alpha2[1]); |
1910 | } | |
1911 | print_rd_rules(rd); | |
1912 | } | |
1913 | ||
2df78167 | 1914 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 1915 | { |
e9c0268f | 1916 | pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
1917 | print_rd_rules(rd); |
1918 | } | |
1919 | ||
d2372b31 | 1920 | /* Takes ownership of rd only if it doesn't fail */ |
a3d2eaf0 | 1921 | static int __set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 1922 | { |
9c96477d | 1923 | const struct ieee80211_regdomain *intersected_rd = NULL; |
79c97e97 | 1924 | struct cfg80211_registered_device *rdev = NULL; |
806a9e39 | 1925 | struct wiphy *request_wiphy; |
b2e1b302 LR |
1926 | /* Some basic sanity checks first */ |
1927 | ||
b2e1b302 | 1928 | if (is_world_regdom(rd->alpha2)) { |
f6037d09 | 1929 | if (WARN_ON(!reg_is_valid_request(rd->alpha2))) |
b2e1b302 LR |
1930 | return -EINVAL; |
1931 | update_world_regdomain(rd); | |
1932 | return 0; | |
1933 | } | |
b2e1b302 LR |
1934 | |
1935 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && | |
1936 | !is_unknown_alpha2(rd->alpha2)) | |
1937 | return -EINVAL; | |
1938 | ||
f6037d09 | 1939 | if (!last_request) |
b2e1b302 LR |
1940 | return -EINVAL; |
1941 | ||
fb1fc7ad LR |
1942 | /* |
1943 | * Lets only bother proceeding on the same alpha2 if the current | |
3f2355cb | 1944 | * rd is non static (it means CRDA was present and was used last) |
fb1fc7ad LR |
1945 | * and the pending request came in from a country IE |
1946 | */ | |
7db90f4a | 1947 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
fb1fc7ad LR |
1948 | /* |
1949 | * If someone else asked us to change the rd lets only bother | |
1950 | * checking if the alpha2 changes if CRDA was already called | |
1951 | */ | |
baeb66fe | 1952 | if (!regdom_changes(rd->alpha2)) |
3f2355cb LR |
1953 | return -EINVAL; |
1954 | } | |
1955 | ||
fb1fc7ad LR |
1956 | /* |
1957 | * Now lets set the regulatory domain, update all driver channels | |
b2e1b302 LR |
1958 | * and finally inform them of what we have done, in case they want |
1959 | * to review or adjust their own settings based on their own | |
fb1fc7ad LR |
1960 | * internal EEPROM data |
1961 | */ | |
b2e1b302 | 1962 | |
f6037d09 | 1963 | if (WARN_ON(!reg_is_valid_request(rd->alpha2))) |
b2e1b302 LR |
1964 | return -EINVAL; |
1965 | ||
8375af3b | 1966 | if (!is_valid_rd(rd)) { |
e9c0268f | 1967 | pr_err("Invalid regulatory domain detected:\n"); |
8375af3b LR |
1968 | print_regdomain_info(rd); |
1969 | return -EINVAL; | |
b2e1b302 LR |
1970 | } |
1971 | ||
806a9e39 LR |
1972 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
1973 | ||
b8295acd | 1974 | if (!last_request->intersect) { |
3e0c3ff3 LR |
1975 | int r; |
1976 | ||
7db90f4a | 1977 | if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) { |
3e0c3ff3 LR |
1978 | reset_regdomains(); |
1979 | cfg80211_regdomain = rd; | |
1980 | return 0; | |
1981 | } | |
1982 | ||
fb1fc7ad LR |
1983 | /* |
1984 | * For a driver hint, lets copy the regulatory domain the | |
1985 | * driver wanted to the wiphy to deal with conflicts | |
1986 | */ | |
3e0c3ff3 | 1987 | |
558f6d32 LR |
1988 | /* |
1989 | * Userspace could have sent two replies with only | |
1990 | * one kernel request. | |
1991 | */ | |
1992 | if (request_wiphy->regd) | |
1993 | return -EALREADY; | |
3e0c3ff3 | 1994 | |
806a9e39 | 1995 | r = reg_copy_regd(&request_wiphy->regd, rd); |
3e0c3ff3 LR |
1996 | if (r) |
1997 | return r; | |
1998 | ||
b8295acd LR |
1999 | reset_regdomains(); |
2000 | cfg80211_regdomain = rd; | |
2001 | return 0; | |
2002 | } | |
2003 | ||
2004 | /* Intersection requires a bit more work */ | |
2005 | ||
7db90f4a | 2006 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
b8295acd | 2007 | |
9c96477d LR |
2008 | intersected_rd = regdom_intersect(rd, cfg80211_regdomain); |
2009 | if (!intersected_rd) | |
2010 | return -EINVAL; | |
b8295acd | 2011 | |
fb1fc7ad LR |
2012 | /* |
2013 | * We can trash what CRDA provided now. | |
3e0c3ff3 | 2014 | * However if a driver requested this specific regulatory |
fb1fc7ad LR |
2015 | * domain we keep it for its private use |
2016 | */ | |
7db90f4a | 2017 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) |
806a9e39 | 2018 | request_wiphy->regd = rd; |
3e0c3ff3 LR |
2019 | else |
2020 | kfree(rd); | |
2021 | ||
b8295acd LR |
2022 | rd = NULL; |
2023 | ||
2024 | reset_regdomains(); | |
2025 | cfg80211_regdomain = intersected_rd; | |
2026 | ||
2027 | return 0; | |
9c96477d LR |
2028 | } |
2029 | ||
3f2355cb LR |
2030 | if (!intersected_rd) |
2031 | return -EINVAL; | |
2032 | ||
79c97e97 | 2033 | rdev = wiphy_to_dev(request_wiphy); |
3f2355cb | 2034 | |
79c97e97 JB |
2035 | rdev->country_ie_alpha2[0] = rd->alpha2[0]; |
2036 | rdev->country_ie_alpha2[1] = rd->alpha2[1]; | |
2037 | rdev->env = last_request->country_ie_env; | |
3f2355cb LR |
2038 | |
2039 | BUG_ON(intersected_rd == rd); | |
2040 | ||
2041 | kfree(rd); | |
2042 | rd = NULL; | |
2043 | ||
b8295acd | 2044 | reset_regdomains(); |
3f2355cb | 2045 | cfg80211_regdomain = intersected_rd; |
b2e1b302 LR |
2046 | |
2047 | return 0; | |
2048 | } | |
2049 | ||
2050 | ||
fb1fc7ad LR |
2051 | /* |
2052 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2053 | * multiple drivers can be ironed out later. Caller must've already |
fb1fc7ad LR |
2054 | * kmalloc'd the rd structure. Caller must hold cfg80211_mutex |
2055 | */ | |
a3d2eaf0 | 2056 | int set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2057 | { |
b2e1b302 LR |
2058 | int r; |
2059 | ||
761cf7ec LR |
2060 | assert_cfg80211_lock(); |
2061 | ||
abc7381b LR |
2062 | mutex_lock(®_mutex); |
2063 | ||
b2e1b302 LR |
2064 | /* Note that this doesn't update the wiphys, this is done below */ |
2065 | r = __set_regdom(rd); | |
d2372b31 JB |
2066 | if (r) { |
2067 | kfree(rd); | |
abc7381b | 2068 | mutex_unlock(®_mutex); |
b2e1b302 | 2069 | return r; |
d2372b31 | 2070 | } |
b2e1b302 | 2071 | |
b2e1b302 | 2072 | /* This would make this whole thing pointless */ |
a01ddafd LR |
2073 | if (!last_request->intersect) |
2074 | BUG_ON(rd != cfg80211_regdomain); | |
b2e1b302 LR |
2075 | |
2076 | /* update all wiphys now with the new established regulatory domain */ | |
f6037d09 | 2077 | update_all_wiphy_regulatory(last_request->initiator); |
b2e1b302 | 2078 | |
a01ddafd | 2079 | print_regdomain(cfg80211_regdomain); |
b2e1b302 | 2080 | |
73d54c9e LR |
2081 | nl80211_send_reg_change_event(last_request); |
2082 | ||
b2e253cf LR |
2083 | reg_set_request_processed(); |
2084 | ||
abc7381b LR |
2085 | mutex_unlock(®_mutex); |
2086 | ||
b2e1b302 LR |
2087 | return r; |
2088 | } | |
2089 | ||
a1794390 | 2090 | /* Caller must hold cfg80211_mutex */ |
3f2355cb LR |
2091 | void reg_device_remove(struct wiphy *wiphy) |
2092 | { | |
0ad8acaf | 2093 | struct wiphy *request_wiphy = NULL; |
806a9e39 | 2094 | |
761cf7ec LR |
2095 | assert_cfg80211_lock(); |
2096 | ||
abc7381b LR |
2097 | mutex_lock(®_mutex); |
2098 | ||
0ef9ccdd CW |
2099 | kfree(wiphy->regd); |
2100 | ||
0ad8acaf LR |
2101 | if (last_request) |
2102 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); | |
806a9e39 | 2103 | |
0ef9ccdd | 2104 | if (!request_wiphy || request_wiphy != wiphy) |
abc7381b | 2105 | goto out; |
0ef9ccdd | 2106 | |
806a9e39 | 2107 | last_request->wiphy_idx = WIPHY_IDX_STALE; |
3f2355cb | 2108 | last_request->country_ie_env = ENVIRON_ANY; |
abc7381b LR |
2109 | out: |
2110 | mutex_unlock(®_mutex); | |
3f2355cb LR |
2111 | } |
2112 | ||
2fcc9f73 | 2113 | int __init regulatory_init(void) |
b2e1b302 | 2114 | { |
bcf4f99b | 2115 | int err = 0; |
734366de | 2116 | |
b2e1b302 LR |
2117 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
2118 | if (IS_ERR(reg_pdev)) | |
2119 | return PTR_ERR(reg_pdev); | |
734366de | 2120 | |
fe33eb39 | 2121 | spin_lock_init(®_requests_lock); |
e38f8a7a | 2122 | spin_lock_init(®_pending_beacons_lock); |
fe33eb39 | 2123 | |
a3d2eaf0 | 2124 | cfg80211_regdomain = cfg80211_world_regdom; |
734366de | 2125 | |
09d989d1 LR |
2126 | user_alpha2[0] = '9'; |
2127 | user_alpha2[1] = '7'; | |
2128 | ||
ae9e4b0d LR |
2129 | /* We always try to get an update for the static regdomain */ |
2130 | err = regulatory_hint_core(cfg80211_regdomain->alpha2); | |
ba25c141 | 2131 | if (err) { |
bcf4f99b LR |
2132 | if (err == -ENOMEM) |
2133 | return err; | |
2134 | /* | |
2135 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
2136 | * memory which is handled and propagated appropriately above | |
2137 | * but it can also fail during a netlink_broadcast() or during | |
2138 | * early boot for call_usermodehelper(). For now treat these | |
2139 | * errors as non-fatal. | |
2140 | */ | |
e9c0268f | 2141 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b LR |
2142 | #ifdef CONFIG_CFG80211_REG_DEBUG |
2143 | /* We want to find out exactly why when debugging */ | |
2144 | WARN_ON(err); | |
734366de | 2145 | #endif |
bcf4f99b | 2146 | } |
734366de | 2147 | |
ae9e4b0d LR |
2148 | /* |
2149 | * Finally, if the user set the module parameter treat it | |
2150 | * as a user hint. | |
2151 | */ | |
2152 | if (!is_world_regdom(ieee80211_regdom)) | |
2153 | regulatory_hint_user(ieee80211_regdom); | |
2154 | ||
b2e1b302 LR |
2155 | return 0; |
2156 | } | |
2157 | ||
2fcc9f73 | 2158 | void /* __init_or_exit */ regulatory_exit(void) |
b2e1b302 | 2159 | { |
fe33eb39 | 2160 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 2161 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
2162 | |
2163 | cancel_work_sync(®_work); | |
2164 | ||
a1794390 | 2165 | mutex_lock(&cfg80211_mutex); |
abc7381b | 2166 | mutex_lock(®_mutex); |
734366de | 2167 | |
b2e1b302 | 2168 | reset_regdomains(); |
734366de | 2169 | |
f6037d09 JB |
2170 | kfree(last_request); |
2171 | ||
b2e1b302 | 2172 | platform_device_unregister(reg_pdev); |
734366de | 2173 | |
e38f8a7a LR |
2174 | spin_lock_bh(®_pending_beacons_lock); |
2175 | if (!list_empty(®_pending_beacons)) { | |
2176 | list_for_each_entry_safe(reg_beacon, btmp, | |
2177 | ®_pending_beacons, list) { | |
2178 | list_del(®_beacon->list); | |
2179 | kfree(reg_beacon); | |
2180 | } | |
2181 | } | |
2182 | spin_unlock_bh(®_pending_beacons_lock); | |
2183 | ||
2184 | if (!list_empty(®_beacon_list)) { | |
2185 | list_for_each_entry_safe(reg_beacon, btmp, | |
2186 | ®_beacon_list, list) { | |
2187 | list_del(®_beacon->list); | |
2188 | kfree(reg_beacon); | |
2189 | } | |
2190 | } | |
2191 | ||
fe33eb39 LR |
2192 | spin_lock(®_requests_lock); |
2193 | if (!list_empty(®_requests_list)) { | |
2194 | list_for_each_entry_safe(reg_request, tmp, | |
2195 | ®_requests_list, list) { | |
2196 | list_del(®_request->list); | |
2197 | kfree(reg_request); | |
2198 | } | |
2199 | } | |
2200 | spin_unlock(®_requests_lock); | |
2201 | ||
abc7381b | 2202 | mutex_unlock(®_mutex); |
a1794390 | 2203 | mutex_unlock(&cfg80211_mutex); |
8318d78a | 2204 | } |