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Commit | Line | Data |
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8318d78a JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
3b77d5ec | 5 | * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com> |
8318d78a | 6 | * |
3b77d5ec LR |
7 | * Permission to use, copy, modify, and/or distribute this software for any |
8 | * purpose with or without fee is hereby granted, provided that the above | |
9 | * copyright notice and this permission notice appear in all copies. | |
10 | * | |
11 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
12 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
13 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
14 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
15 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
16 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
17 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
8318d78a JB |
18 | */ |
19 | ||
3b77d5ec | 20 | |
b2e1b302 LR |
21 | /** |
22 | * DOC: Wireless regulatory infrastructure | |
8318d78a JB |
23 | * |
24 | * The usual implementation is for a driver to read a device EEPROM to | |
25 | * determine which regulatory domain it should be operating under, then | |
26 | * looking up the allowable channels in a driver-local table and finally | |
27 | * registering those channels in the wiphy structure. | |
28 | * | |
b2e1b302 LR |
29 | * Another set of compliance enforcement is for drivers to use their |
30 | * own compliance limits which can be stored on the EEPROM. The host | |
31 | * driver or firmware may ensure these are used. | |
32 | * | |
33 | * In addition to all this we provide an extra layer of regulatory | |
34 | * conformance. For drivers which do not have any regulatory | |
35 | * information CRDA provides the complete regulatory solution. | |
36 | * For others it provides a community effort on further restrictions | |
37 | * to enhance compliance. | |
38 | * | |
39 | * Note: When number of rules --> infinity we will not be able to | |
40 | * index on alpha2 any more, instead we'll probably have to | |
41 | * rely on some SHA1 checksum of the regdomain for example. | |
42 | * | |
8318d78a | 43 | */ |
e9c0268f JP |
44 | |
45 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
46 | ||
8318d78a | 47 | #include <linux/kernel.h> |
bc3b2d7f | 48 | #include <linux/export.h> |
5a0e3ad6 | 49 | #include <linux/slab.h> |
b2e1b302 LR |
50 | #include <linux/list.h> |
51 | #include <linux/random.h> | |
c61029c7 | 52 | #include <linux/ctype.h> |
b2e1b302 LR |
53 | #include <linux/nl80211.h> |
54 | #include <linux/platform_device.h> | |
d9b93842 | 55 | #include <linux/moduleparam.h> |
b2e1b302 | 56 | #include <net/cfg80211.h> |
8318d78a | 57 | #include "core.h" |
b2e1b302 | 58 | #include "reg.h" |
3b377ea9 | 59 | #include "regdb.h" |
73d54c9e | 60 | #include "nl80211.h" |
8318d78a | 61 | |
4113f751 | 62 | #ifdef CONFIG_CFG80211_REG_DEBUG |
12c5ffb5 JP |
63 | #define REG_DBG_PRINT(format, args...) \ |
64 | printk(KERN_DEBUG pr_fmt(format), ##args) | |
4113f751 | 65 | #else |
8271195e | 66 | #define REG_DBG_PRINT(args...) |
4113f751 LR |
67 | #endif |
68 | ||
a042994d LR |
69 | static struct regulatory_request core_request_world = { |
70 | .initiator = NL80211_REGDOM_SET_BY_CORE, | |
71 | .alpha2[0] = '0', | |
72 | .alpha2[1] = '0', | |
73 | .intersect = false, | |
74 | .processed = true, | |
75 | .country_ie_env = ENVIRON_ANY, | |
76 | }; | |
77 | ||
5166ccd2 | 78 | /* Receipt of information from last regulatory request */ |
a042994d | 79 | static struct regulatory_request *last_request = &core_request_world; |
734366de | 80 | |
b2e1b302 LR |
81 | /* To trigger userspace events */ |
82 | static struct platform_device *reg_pdev; | |
8318d78a | 83 | |
4d9d88d1 SJR |
84 | static struct device_type reg_device_type = { |
85 | .uevent = reg_device_uevent, | |
86 | }; | |
87 | ||
fb1fc7ad LR |
88 | /* |
89 | * Central wireless core regulatory domains, we only need two, | |
734366de | 90 | * the current one and a world regulatory domain in case we have no |
fb1fc7ad LR |
91 | * information to give us an alpha2 |
92 | */ | |
f130347c | 93 | const struct ieee80211_regdomain *cfg80211_regdomain; |
734366de | 94 | |
abc7381b LR |
95 | /* |
96 | * Protects static reg.c components: | |
97 | * - cfg80211_world_regdom | |
98 | * - cfg80211_regdom | |
abc7381b | 99 | * - last_request |
57b5ce07 | 100 | * - reg_num_devs_support_basehint |
abc7381b | 101 | */ |
670b7f11 | 102 | static DEFINE_MUTEX(reg_mutex); |
46a5ebaf | 103 | |
57b5ce07 LR |
104 | /* |
105 | * Number of devices that registered to the core | |
106 | * that support cellular base station regulatory hints | |
107 | */ | |
108 | static int reg_num_devs_support_basehint; | |
109 | ||
46a5ebaf JB |
110 | static inline void assert_reg_lock(void) |
111 | { | |
112 | lockdep_assert_held(®_mutex); | |
113 | } | |
abc7381b | 114 | |
e38f8a7a | 115 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
116 | static LIST_HEAD(reg_requests_list); |
117 | static spinlock_t reg_requests_lock; | |
118 | ||
e38f8a7a LR |
119 | /* Used to queue up beacon hints for review */ |
120 | static LIST_HEAD(reg_pending_beacons); | |
121 | static spinlock_t reg_pending_beacons_lock; | |
122 | ||
123 | /* Used to keep track of processed beacon hints */ | |
124 | static LIST_HEAD(reg_beacon_list); | |
125 | ||
126 | struct reg_beacon { | |
127 | struct list_head list; | |
128 | struct ieee80211_channel chan; | |
129 | }; | |
130 | ||
f333a7a2 LR |
131 | static void reg_todo(struct work_struct *work); |
132 | static DECLARE_WORK(reg_work, reg_todo); | |
133 | ||
a90c7a31 LR |
134 | static void reg_timeout_work(struct work_struct *work); |
135 | static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work); | |
136 | ||
734366de JB |
137 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
138 | static const struct ieee80211_regdomain world_regdom = { | |
90cdc6df | 139 | .n_reg_rules = 6, |
734366de JB |
140 | .alpha2 = "00", |
141 | .reg_rules = { | |
68798a62 LR |
142 | /* IEEE 802.11b/g, channels 1..11 */ |
143 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
611b6a82 LR |
144 | /* IEEE 802.11b/g, channels 12..13. No HT40 |
145 | * channel fits here. */ | |
146 | REG_RULE(2467-10, 2472+10, 20, 6, 20, | |
3fc71f77 LR |
147 | NL80211_RRF_PASSIVE_SCAN | |
148 | NL80211_RRF_NO_IBSS), | |
611b6a82 LR |
149 | /* IEEE 802.11 channel 14 - Only JP enables |
150 | * this and for 802.11b only */ | |
151 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
152 | NL80211_RRF_PASSIVE_SCAN | | |
153 | NL80211_RRF_NO_IBSS | | |
154 | NL80211_RRF_NO_OFDM), | |
155 | /* IEEE 802.11a, channel 36..48 */ | |
ec329ace | 156 | REG_RULE(5180-10, 5240+10, 40, 6, 20, |
611b6a82 LR |
157 | NL80211_RRF_PASSIVE_SCAN | |
158 | NL80211_RRF_NO_IBSS), | |
3fc71f77 LR |
159 | |
160 | /* NB: 5260 MHz - 5700 MHz requies DFS */ | |
161 | ||
162 | /* IEEE 802.11a, channel 149..165 */ | |
ec329ace | 163 | REG_RULE(5745-10, 5825+10, 40, 6, 20, |
3fc71f77 LR |
164 | NL80211_RRF_PASSIVE_SCAN | |
165 | NL80211_RRF_NO_IBSS), | |
90cdc6df VK |
166 | |
167 | /* IEEE 802.11ad (60gHz), channels 1..3 */ | |
168 | REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), | |
734366de JB |
169 | } |
170 | }; | |
171 | ||
a3d2eaf0 JB |
172 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
173 | &world_regdom; | |
734366de | 174 | |
6ee7d330 | 175 | static char *ieee80211_regdom = "00"; |
09d989d1 | 176 | static char user_alpha2[2]; |
6ee7d330 | 177 | |
734366de JB |
178 | module_param(ieee80211_regdom, charp, 0444); |
179 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
180 | ||
a042994d | 181 | static void reset_regdomains(bool full_reset) |
734366de | 182 | { |
942b25cf JB |
183 | /* avoid freeing static information or freeing something twice */ |
184 | if (cfg80211_regdomain == cfg80211_world_regdom) | |
185 | cfg80211_regdomain = NULL; | |
186 | if (cfg80211_world_regdom == &world_regdom) | |
187 | cfg80211_world_regdom = NULL; | |
188 | if (cfg80211_regdomain == &world_regdom) | |
189 | cfg80211_regdomain = NULL; | |
942b25cf JB |
190 | |
191 | kfree(cfg80211_regdomain); | |
192 | kfree(cfg80211_world_regdom); | |
734366de | 193 | |
a3d2eaf0 | 194 | cfg80211_world_regdom = &world_regdom; |
734366de | 195 | cfg80211_regdomain = NULL; |
a042994d LR |
196 | |
197 | if (!full_reset) | |
198 | return; | |
199 | ||
200 | if (last_request != &core_request_world) | |
201 | kfree(last_request); | |
202 | last_request = &core_request_world; | |
734366de JB |
203 | } |
204 | ||
fb1fc7ad LR |
205 | /* |
206 | * Dynamic world regulatory domain requested by the wireless | |
207 | * core upon initialization | |
208 | */ | |
a3d2eaf0 | 209 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 210 | { |
f6037d09 | 211 | BUG_ON(!last_request); |
734366de | 212 | |
a042994d | 213 | reset_regdomains(false); |
734366de JB |
214 | |
215 | cfg80211_world_regdom = rd; | |
216 | cfg80211_regdomain = rd; | |
217 | } | |
734366de | 218 | |
a3d2eaf0 | 219 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
220 | { |
221 | if (!alpha2) | |
222 | return false; | |
223 | if (alpha2[0] == '0' && alpha2[1] == '0') | |
224 | return true; | |
225 | return false; | |
226 | } | |
8318d78a | 227 | |
a3d2eaf0 | 228 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
229 | { |
230 | if (!alpha2) | |
231 | return false; | |
232 | if (alpha2[0] != 0 && alpha2[1] != 0) | |
233 | return true; | |
234 | return false; | |
235 | } | |
8318d78a | 236 | |
a3d2eaf0 | 237 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
238 | { |
239 | if (!alpha2) | |
240 | return false; | |
fb1fc7ad LR |
241 | /* |
242 | * Special case where regulatory domain was built by driver | |
243 | * but a specific alpha2 cannot be determined | |
244 | */ | |
b2e1b302 LR |
245 | if (alpha2[0] == '9' && alpha2[1] == '9') |
246 | return true; | |
247 | return false; | |
248 | } | |
8318d78a | 249 | |
3f2355cb LR |
250 | static bool is_intersected_alpha2(const char *alpha2) |
251 | { | |
252 | if (!alpha2) | |
253 | return false; | |
fb1fc7ad LR |
254 | /* |
255 | * Special case where regulatory domain is the | |
3f2355cb | 256 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
257 | * structures |
258 | */ | |
3f2355cb LR |
259 | if (alpha2[0] == '9' && alpha2[1] == '8') |
260 | return true; | |
261 | return false; | |
262 | } | |
263 | ||
a3d2eaf0 | 264 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
265 | { |
266 | if (!alpha2) | |
267 | return false; | |
c61029c7 | 268 | if (isalpha(alpha2[0]) && isalpha(alpha2[1])) |
b2e1b302 LR |
269 | return true; |
270 | return false; | |
271 | } | |
8318d78a | 272 | |
a3d2eaf0 | 273 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
274 | { |
275 | if (!alpha2_x || !alpha2_y) | |
276 | return false; | |
277 | if (alpha2_x[0] == alpha2_y[0] && | |
278 | alpha2_x[1] == alpha2_y[1]) | |
279 | return true; | |
280 | return false; | |
281 | } | |
282 | ||
69b1572b | 283 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 284 | { |
761cf7ec LR |
285 | assert_cfg80211_lock(); |
286 | ||
b2e1b302 LR |
287 | if (!cfg80211_regdomain) |
288 | return true; | |
289 | if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) | |
290 | return false; | |
291 | return true; | |
292 | } | |
293 | ||
09d989d1 LR |
294 | /* |
295 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
296 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
297 | * has ever been issued. | |
298 | */ | |
299 | static bool is_user_regdom_saved(void) | |
300 | { | |
301 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
302 | return false; | |
303 | ||
304 | /* This would indicate a mistake on the design */ | |
305 | if (WARN((!is_world_regdom(user_alpha2) && | |
306 | !is_an_alpha2(user_alpha2)), | |
307 | "Unexpected user alpha2: %c%c\n", | |
308 | user_alpha2[0], | |
309 | user_alpha2[1])) | |
310 | return false; | |
311 | ||
312 | return true; | |
313 | } | |
314 | ||
3b377ea9 JL |
315 | static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd, |
316 | const struct ieee80211_regdomain *src_regd) | |
317 | { | |
318 | struct ieee80211_regdomain *regd; | |
319 | int size_of_regd = 0; | |
320 | unsigned int i; | |
321 | ||
322 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
323 | ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule)); | |
324 | ||
325 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
326 | if (!regd) | |
327 | return -ENOMEM; | |
328 | ||
329 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
330 | ||
331 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
332 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
333 | sizeof(struct ieee80211_reg_rule)); | |
334 | ||
335 | *dst_regd = regd; | |
336 | return 0; | |
337 | } | |
338 | ||
339 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB | |
340 | struct reg_regdb_search_request { | |
341 | char alpha2[2]; | |
342 | struct list_head list; | |
343 | }; | |
344 | ||
345 | static LIST_HEAD(reg_regdb_search_list); | |
368d06f5 | 346 | static DEFINE_MUTEX(reg_regdb_search_mutex); |
3b377ea9 JL |
347 | |
348 | static void reg_regdb_search(struct work_struct *work) | |
349 | { | |
350 | struct reg_regdb_search_request *request; | |
351 | const struct ieee80211_regdomain *curdom, *regdom; | |
352 | int i, r; | |
353 | ||
368d06f5 | 354 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 JL |
355 | while (!list_empty(®_regdb_search_list)) { |
356 | request = list_first_entry(®_regdb_search_list, | |
357 | struct reg_regdb_search_request, | |
358 | list); | |
359 | list_del(&request->list); | |
360 | ||
361 | for (i=0; i<reg_regdb_size; i++) { | |
362 | curdom = reg_regdb[i]; | |
363 | ||
364 | if (!memcmp(request->alpha2, curdom->alpha2, 2)) { | |
365 | r = reg_copy_regd(®dom, curdom); | |
366 | if (r) | |
367 | break; | |
3b377ea9 JL |
368 | mutex_lock(&cfg80211_mutex); |
369 | set_regdom(regdom); | |
370 | mutex_unlock(&cfg80211_mutex); | |
3b377ea9 JL |
371 | break; |
372 | } | |
373 | } | |
374 | ||
375 | kfree(request); | |
376 | } | |
368d06f5 | 377 | mutex_unlock(®_regdb_search_mutex); |
3b377ea9 JL |
378 | } |
379 | ||
380 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); | |
381 | ||
382 | static void reg_regdb_query(const char *alpha2) | |
383 | { | |
384 | struct reg_regdb_search_request *request; | |
385 | ||
386 | if (!alpha2) | |
387 | return; | |
388 | ||
389 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); | |
390 | if (!request) | |
391 | return; | |
392 | ||
393 | memcpy(request->alpha2, alpha2, 2); | |
394 | ||
368d06f5 | 395 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 | 396 | list_add_tail(&request->list, ®_regdb_search_list); |
368d06f5 | 397 | mutex_unlock(®_regdb_search_mutex); |
3b377ea9 JL |
398 | |
399 | schedule_work(®_regdb_work); | |
400 | } | |
80007efe LR |
401 | |
402 | /* Feel free to add any other sanity checks here */ | |
403 | static void reg_regdb_size_check(void) | |
404 | { | |
405 | /* We should ideally BUILD_BUG_ON() but then random builds would fail */ | |
406 | WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); | |
407 | } | |
3b377ea9 | 408 | #else |
80007efe | 409 | static inline void reg_regdb_size_check(void) {} |
3b377ea9 JL |
410 | static inline void reg_regdb_query(const char *alpha2) {} |
411 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ | |
412 | ||
fb1fc7ad LR |
413 | /* |
414 | * This lets us keep regulatory code which is updated on a regulatory | |
4d9d88d1 SJR |
415 | * basis in userspace. Country information is filled in by |
416 | * reg_device_uevent | |
fb1fc7ad | 417 | */ |
b2e1b302 LR |
418 | static int call_crda(const char *alpha2) |
419 | { | |
b2e1b302 | 420 | if (!is_world_regdom((char *) alpha2)) |
e9c0268f | 421 | pr_info("Calling CRDA for country: %c%c\n", |
b2e1b302 LR |
422 | alpha2[0], alpha2[1]); |
423 | else | |
e9c0268f | 424 | pr_info("Calling CRDA to update world regulatory domain\n"); |
b2e1b302 | 425 | |
3b377ea9 JL |
426 | /* query internal regulatory database (if it exists) */ |
427 | reg_regdb_query(alpha2); | |
428 | ||
4d9d88d1 | 429 | return kobject_uevent(®_pdev->dev.kobj, KOBJ_CHANGE); |
b2e1b302 LR |
430 | } |
431 | ||
b2e1b302 | 432 | /* Used by nl80211 before kmalloc'ing our regulatory domain */ |
a3d2eaf0 | 433 | bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 434 | { |
61405e97 LR |
435 | assert_cfg80211_lock(); |
436 | ||
f6037d09 JB |
437 | if (!last_request) |
438 | return false; | |
439 | ||
440 | return alpha2_equal(last_request->alpha2, alpha2); | |
b2e1b302 | 441 | } |
8318d78a | 442 | |
b2e1b302 | 443 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 444 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 445 | { |
a3d2eaf0 | 446 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
447 | u32 freq_diff; |
448 | ||
91e99004 | 449 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
450 | return false; |
451 | ||
452 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
453 | return false; | |
454 | ||
455 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
456 | ||
bd05f28e RK |
457 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
458 | freq_range->max_bandwidth_khz > freq_diff) | |
b2e1b302 LR |
459 | return false; |
460 | ||
461 | return true; | |
462 | } | |
463 | ||
a3d2eaf0 | 464 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 465 | { |
a3d2eaf0 | 466 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 467 | unsigned int i; |
8318d78a | 468 | |
b2e1b302 LR |
469 | if (!rd->n_reg_rules) |
470 | return false; | |
8318d78a | 471 | |
88dc1c3f LR |
472 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
473 | return false; | |
474 | ||
b2e1b302 LR |
475 | for (i = 0; i < rd->n_reg_rules; i++) { |
476 | reg_rule = &rd->reg_rules[i]; | |
477 | if (!is_valid_reg_rule(reg_rule)) | |
478 | return false; | |
479 | } | |
480 | ||
481 | return true; | |
8318d78a JB |
482 | } |
483 | ||
038659e7 LR |
484 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
485 | u32 center_freq_khz, | |
486 | u32 bw_khz) | |
b2e1b302 | 487 | { |
038659e7 LR |
488 | u32 start_freq_khz, end_freq_khz; |
489 | ||
490 | start_freq_khz = center_freq_khz - (bw_khz/2); | |
491 | end_freq_khz = center_freq_khz + (bw_khz/2); | |
492 | ||
493 | if (start_freq_khz >= freq_range->start_freq_khz && | |
494 | end_freq_khz <= freq_range->end_freq_khz) | |
495 | return true; | |
496 | ||
497 | return false; | |
b2e1b302 | 498 | } |
8318d78a | 499 | |
0c7dc45d LR |
500 | /** |
501 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
502 | * @freq_range: frequency rule we want to query | |
503 | * @freq_khz: frequency we are inquiring about | |
504 | * | |
505 | * This lets us know if a specific frequency rule is or is not relevant to | |
506 | * a specific frequency's band. Bands are device specific and artificial | |
507 | * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is | |
508 | * safe for now to assume that a frequency rule should not be part of a | |
509 | * frequency's band if the start freq or end freq are off by more than 2 GHz. | |
510 | * This resolution can be lowered and should be considered as we add | |
511 | * regulatory rule support for other "bands". | |
512 | **/ | |
513 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
514 | u32 freq_khz) | |
515 | { | |
516 | #define ONE_GHZ_IN_KHZ 1000000 | |
517 | if (abs(freq_khz - freq_range->start_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) | |
518 | return true; | |
519 | if (abs(freq_khz - freq_range->end_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) | |
520 | return true; | |
521 | return false; | |
522 | #undef ONE_GHZ_IN_KHZ | |
523 | } | |
524 | ||
fb1fc7ad LR |
525 | /* |
526 | * Helper for regdom_intersect(), this does the real | |
527 | * mathematical intersection fun | |
528 | */ | |
9c96477d LR |
529 | static int reg_rules_intersect( |
530 | const struct ieee80211_reg_rule *rule1, | |
531 | const struct ieee80211_reg_rule *rule2, | |
532 | struct ieee80211_reg_rule *intersected_rule) | |
533 | { | |
534 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
535 | struct ieee80211_freq_range *freq_range; | |
536 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
537 | struct ieee80211_power_rule *power_rule; | |
538 | u32 freq_diff; | |
539 | ||
540 | freq_range1 = &rule1->freq_range; | |
541 | freq_range2 = &rule2->freq_range; | |
542 | freq_range = &intersected_rule->freq_range; | |
543 | ||
544 | power_rule1 = &rule1->power_rule; | |
545 | power_rule2 = &rule2->power_rule; | |
546 | power_rule = &intersected_rule->power_rule; | |
547 | ||
548 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
549 | freq_range2->start_freq_khz); | |
550 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, | |
551 | freq_range2->end_freq_khz); | |
552 | freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, | |
553 | freq_range2->max_bandwidth_khz); | |
554 | ||
555 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
556 | if (freq_range->max_bandwidth_khz > freq_diff) | |
557 | freq_range->max_bandwidth_khz = freq_diff; | |
558 | ||
559 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
560 | power_rule2->max_eirp); | |
561 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
562 | power_rule2->max_antenna_gain); | |
563 | ||
564 | intersected_rule->flags = (rule1->flags | rule2->flags); | |
565 | ||
566 | if (!is_valid_reg_rule(intersected_rule)) | |
567 | return -EINVAL; | |
568 | ||
569 | return 0; | |
570 | } | |
571 | ||
572 | /** | |
573 | * regdom_intersect - do the intersection between two regulatory domains | |
574 | * @rd1: first regulatory domain | |
575 | * @rd2: second regulatory domain | |
576 | * | |
577 | * Use this function to get the intersection between two regulatory domains. | |
578 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
579 | * as no one single alpha2 can represent this regulatory domain. | |
580 | * | |
581 | * Returns a pointer to the regulatory domain structure which will hold the | |
582 | * resulting intersection of rules between rd1 and rd2. We will | |
583 | * kzalloc() this structure for you. | |
584 | */ | |
585 | static struct ieee80211_regdomain *regdom_intersect( | |
586 | const struct ieee80211_regdomain *rd1, | |
587 | const struct ieee80211_regdomain *rd2) | |
588 | { | |
589 | int r, size_of_regd; | |
590 | unsigned int x, y; | |
591 | unsigned int num_rules = 0, rule_idx = 0; | |
592 | const struct ieee80211_reg_rule *rule1, *rule2; | |
593 | struct ieee80211_reg_rule *intersected_rule; | |
594 | struct ieee80211_regdomain *rd; | |
595 | /* This is just a dummy holder to help us count */ | |
596 | struct ieee80211_reg_rule irule; | |
597 | ||
598 | /* Uses the stack temporarily for counter arithmetic */ | |
599 | intersected_rule = &irule; | |
600 | ||
601 | memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); | |
602 | ||
603 | if (!rd1 || !rd2) | |
604 | return NULL; | |
605 | ||
fb1fc7ad LR |
606 | /* |
607 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
608 | * build them. This is to so we can malloc() and free() a |
609 | * regdomain once. The reason we use reg_rules_intersect() here | |
610 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
611 | * All rules that do check out OK are valid. |
612 | */ | |
9c96477d LR |
613 | |
614 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
615 | rule1 = &rd1->reg_rules[x]; | |
616 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
617 | rule2 = &rd2->reg_rules[y]; | |
618 | if (!reg_rules_intersect(rule1, rule2, | |
619 | intersected_rule)) | |
620 | num_rules++; | |
621 | memset(intersected_rule, 0, | |
622 | sizeof(struct ieee80211_reg_rule)); | |
623 | } | |
624 | } | |
625 | ||
626 | if (!num_rules) | |
627 | return NULL; | |
628 | ||
629 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
630 | ((num_rules + 1) * sizeof(struct ieee80211_reg_rule)); | |
631 | ||
632 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
633 | if (!rd) | |
634 | return NULL; | |
635 | ||
636 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
637 | rule1 = &rd1->reg_rules[x]; | |
638 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
639 | rule2 = &rd2->reg_rules[y]; | |
fb1fc7ad LR |
640 | /* |
641 | * This time around instead of using the stack lets | |
9c96477d | 642 | * write to the target rule directly saving ourselves |
fb1fc7ad LR |
643 | * a memcpy() |
644 | */ | |
9c96477d LR |
645 | intersected_rule = &rd->reg_rules[rule_idx]; |
646 | r = reg_rules_intersect(rule1, rule2, | |
647 | intersected_rule); | |
fb1fc7ad LR |
648 | /* |
649 | * No need to memset here the intersected rule here as | |
650 | * we're not using the stack anymore | |
651 | */ | |
9c96477d LR |
652 | if (r) |
653 | continue; | |
654 | rule_idx++; | |
655 | } | |
656 | } | |
657 | ||
658 | if (rule_idx != num_rules) { | |
659 | kfree(rd); | |
660 | return NULL; | |
661 | } | |
662 | ||
663 | rd->n_reg_rules = num_rules; | |
664 | rd->alpha2[0] = '9'; | |
665 | rd->alpha2[1] = '8'; | |
666 | ||
667 | return rd; | |
668 | } | |
669 | ||
fb1fc7ad LR |
670 | /* |
671 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
672 | * want to just have the channel structure use these | |
673 | */ | |
b2e1b302 LR |
674 | static u32 map_regdom_flags(u32 rd_flags) |
675 | { | |
676 | u32 channel_flags = 0; | |
677 | if (rd_flags & NL80211_RRF_PASSIVE_SCAN) | |
678 | channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; | |
679 | if (rd_flags & NL80211_RRF_NO_IBSS) | |
680 | channel_flags |= IEEE80211_CHAN_NO_IBSS; | |
681 | if (rd_flags & NL80211_RRF_DFS) | |
682 | channel_flags |= IEEE80211_CHAN_RADAR; | |
683 | return channel_flags; | |
684 | } | |
685 | ||
1fa25e41 LR |
686 | static int freq_reg_info_regd(struct wiphy *wiphy, |
687 | u32 center_freq, | |
038659e7 | 688 | u32 desired_bw_khz, |
1fa25e41 LR |
689 | const struct ieee80211_reg_rule **reg_rule, |
690 | const struct ieee80211_regdomain *custom_regd) | |
8318d78a JB |
691 | { |
692 | int i; | |
0c7dc45d | 693 | bool band_rule_found = false; |
3e0c3ff3 | 694 | const struct ieee80211_regdomain *regd; |
038659e7 LR |
695 | bool bw_fits = false; |
696 | ||
697 | if (!desired_bw_khz) | |
698 | desired_bw_khz = MHZ_TO_KHZ(20); | |
8318d78a | 699 | |
1fa25e41 | 700 | regd = custom_regd ? custom_regd : cfg80211_regdomain; |
3e0c3ff3 | 701 | |
fb1fc7ad LR |
702 | /* |
703 | * Follow the driver's regulatory domain, if present, unless a country | |
704 | * IE has been processed or a user wants to help complaince further | |
705 | */ | |
2784fe91 LR |
706 | if (!custom_regd && |
707 | last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
7db90f4a | 708 | last_request->initiator != NL80211_REGDOM_SET_BY_USER && |
3e0c3ff3 LR |
709 | wiphy->regd) |
710 | regd = wiphy->regd; | |
711 | ||
712 | if (!regd) | |
b2e1b302 LR |
713 | return -EINVAL; |
714 | ||
3e0c3ff3 | 715 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
716 | const struct ieee80211_reg_rule *rr; |
717 | const struct ieee80211_freq_range *fr = NULL; | |
b2e1b302 | 718 | |
3e0c3ff3 | 719 | rr = ®d->reg_rules[i]; |
b2e1b302 | 720 | fr = &rr->freq_range; |
0c7dc45d | 721 | |
fb1fc7ad LR |
722 | /* |
723 | * We only need to know if one frequency rule was | |
0c7dc45d | 724 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
725 | * not overwrite it once found |
726 | */ | |
0c7dc45d LR |
727 | if (!band_rule_found) |
728 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
729 | ||
038659e7 LR |
730 | bw_fits = reg_does_bw_fit(fr, |
731 | center_freq, | |
732 | desired_bw_khz); | |
0c7dc45d | 733 | |
038659e7 | 734 | if (band_rule_found && bw_fits) { |
b2e1b302 | 735 | *reg_rule = rr; |
038659e7 | 736 | return 0; |
8318d78a JB |
737 | } |
738 | } | |
739 | ||
0c7dc45d LR |
740 | if (!band_rule_found) |
741 | return -ERANGE; | |
742 | ||
038659e7 | 743 | return -EINVAL; |
b2e1b302 LR |
744 | } |
745 | ||
038659e7 LR |
746 | int freq_reg_info(struct wiphy *wiphy, |
747 | u32 center_freq, | |
748 | u32 desired_bw_khz, | |
749 | const struct ieee80211_reg_rule **reg_rule) | |
1fa25e41 | 750 | { |
ac46d48e | 751 | assert_cfg80211_lock(); |
038659e7 LR |
752 | return freq_reg_info_regd(wiphy, |
753 | center_freq, | |
754 | desired_bw_khz, | |
755 | reg_rule, | |
756 | NULL); | |
1fa25e41 | 757 | } |
4f366c5d | 758 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 759 | |
926a0a09 LR |
760 | #ifdef CONFIG_CFG80211_REG_DEBUG |
761 | static const char *reg_initiator_name(enum nl80211_reg_initiator initiator) | |
762 | { | |
763 | switch (initiator) { | |
764 | case NL80211_REGDOM_SET_BY_CORE: | |
765 | return "Set by core"; | |
766 | case NL80211_REGDOM_SET_BY_USER: | |
767 | return "Set by user"; | |
768 | case NL80211_REGDOM_SET_BY_DRIVER: | |
769 | return "Set by driver"; | |
770 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: | |
771 | return "Set by country IE"; | |
772 | default: | |
773 | WARN_ON(1); | |
774 | return "Set by bug"; | |
775 | } | |
776 | } | |
e702d3cf LR |
777 | |
778 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, | |
779 | u32 desired_bw_khz, | |
780 | const struct ieee80211_reg_rule *reg_rule) | |
781 | { | |
782 | const struct ieee80211_power_rule *power_rule; | |
783 | const struct ieee80211_freq_range *freq_range; | |
784 | char max_antenna_gain[32]; | |
785 | ||
786 | power_rule = ®_rule->power_rule; | |
787 | freq_range = ®_rule->freq_range; | |
788 | ||
789 | if (!power_rule->max_antenna_gain) | |
790 | snprintf(max_antenna_gain, 32, "N/A"); | |
791 | else | |
792 | snprintf(max_antenna_gain, 32, "%d", power_rule->max_antenna_gain); | |
793 | ||
d91e41b6 | 794 | REG_DBG_PRINT("Updating information on frequency %d MHz " |
ff039c6f | 795 | "for a %d MHz width channel with regulatory rule:\n", |
e702d3cf LR |
796 | chan->center_freq, |
797 | KHZ_TO_MHZ(desired_bw_khz)); | |
798 | ||
56e6786e | 799 | REG_DBG_PRINT("%d KHz - %d KHz @ %d KHz), (%s mBi, %d mBm)\n", |
e702d3cf LR |
800 | freq_range->start_freq_khz, |
801 | freq_range->end_freq_khz, | |
56e6786e | 802 | freq_range->max_bandwidth_khz, |
e702d3cf LR |
803 | max_antenna_gain, |
804 | power_rule->max_eirp); | |
805 | } | |
806 | #else | |
807 | static void chan_reg_rule_print_dbg(struct ieee80211_channel *chan, | |
808 | u32 desired_bw_khz, | |
809 | const struct ieee80211_reg_rule *reg_rule) | |
810 | { | |
811 | return; | |
812 | } | |
926a0a09 LR |
813 | #endif |
814 | ||
038659e7 LR |
815 | /* |
816 | * Note that right now we assume the desired channel bandwidth | |
817 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
818 | * per channel, the primary and the extension channel). To support | |
819 | * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a | |
820 | * new ieee80211_channel.target_bw and re run the regulatory check | |
821 | * on the wiphy with the target_bw specified. Then we can simply use | |
822 | * that below for the desired_bw_khz below. | |
823 | */ | |
7ca43d03 LR |
824 | static void handle_channel(struct wiphy *wiphy, |
825 | enum nl80211_reg_initiator initiator, | |
826 | enum ieee80211_band band, | |
a92a3ce7 | 827 | unsigned int chan_idx) |
b2e1b302 LR |
828 | { |
829 | int r; | |
038659e7 LR |
830 | u32 flags, bw_flags = 0; |
831 | u32 desired_bw_khz = MHZ_TO_KHZ(20); | |
b2e1b302 LR |
832 | const struct ieee80211_reg_rule *reg_rule = NULL; |
833 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 834 | const struct ieee80211_freq_range *freq_range = NULL; |
a92a3ce7 LR |
835 | struct ieee80211_supported_band *sband; |
836 | struct ieee80211_channel *chan; | |
fe33eb39 | 837 | struct wiphy *request_wiphy = NULL; |
a92a3ce7 | 838 | |
761cf7ec LR |
839 | assert_cfg80211_lock(); |
840 | ||
806a9e39 LR |
841 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
842 | ||
a92a3ce7 LR |
843 | sband = wiphy->bands[band]; |
844 | BUG_ON(chan_idx >= sband->n_channels); | |
845 | chan = &sband->channels[chan_idx]; | |
846 | ||
847 | flags = chan->orig_flags; | |
b2e1b302 | 848 | |
038659e7 LR |
849 | r = freq_reg_info(wiphy, |
850 | MHZ_TO_KHZ(chan->center_freq), | |
851 | desired_bw_khz, | |
852 | ®_rule); | |
b2e1b302 | 853 | |
ca4ffe8f LR |
854 | if (r) { |
855 | /* | |
856 | * We will disable all channels that do not match our | |
25985edc | 857 | * received regulatory rule unless the hint is coming |
ca4ffe8f LR |
858 | * from a Country IE and the Country IE had no information |
859 | * about a band. The IEEE 802.11 spec allows for an AP | |
860 | * to send only a subset of the regulatory rules allowed, | |
861 | * so an AP in the US that only supports 2.4 GHz may only send | |
862 | * a country IE with information for the 2.4 GHz band | |
863 | * while 5 GHz is still supported. | |
864 | */ | |
865 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
866 | r == -ERANGE) | |
867 | return; | |
868 | ||
d91e41b6 | 869 | REG_DBG_PRINT("Disabling freq %d MHz\n", chan->center_freq); |
ca4ffe8f | 870 | chan->flags = IEEE80211_CHAN_DISABLED; |
8318d78a | 871 | return; |
ca4ffe8f | 872 | } |
8318d78a | 873 | |
e702d3cf LR |
874 | chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule); |
875 | ||
b2e1b302 | 876 | power_rule = ®_rule->power_rule; |
038659e7 LR |
877 | freq_range = ®_rule->freq_range; |
878 | ||
879 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
880 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
b2e1b302 | 881 | |
7db90f4a | 882 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 883 | request_wiphy && request_wiphy == wiphy && |
5be83de5 | 884 | request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { |
fb1fc7ad | 885 | /* |
25985edc | 886 | * This guarantees the driver's requested regulatory domain |
f976376d | 887 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
888 | * settings |
889 | */ | |
f976376d | 890 | chan->flags = chan->orig_flags = |
038659e7 | 891 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
892 | chan->max_antenna_gain = chan->orig_mag = |
893 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
f976376d LR |
894 | chan->max_power = chan->orig_mpwr = |
895 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
896 | return; | |
897 | } | |
898 | ||
aa3d7eef | 899 | chan->beacon_found = false; |
038659e7 | 900 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
8318d78a | 901 | chan->max_antenna_gain = min(chan->orig_mag, |
b2e1b302 | 902 | (int) MBI_TO_DBI(power_rule->max_antenna_gain)); |
eccc068e HW |
903 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
904 | chan->max_power = min(chan->max_power, chan->max_reg_power); | |
8318d78a JB |
905 | } |
906 | ||
7ca43d03 LR |
907 | static void handle_band(struct wiphy *wiphy, |
908 | enum ieee80211_band band, | |
909 | enum nl80211_reg_initiator initiator) | |
8318d78a | 910 | { |
a92a3ce7 LR |
911 | unsigned int i; |
912 | struct ieee80211_supported_band *sband; | |
913 | ||
914 | BUG_ON(!wiphy->bands[band]); | |
915 | sband = wiphy->bands[band]; | |
8318d78a JB |
916 | |
917 | for (i = 0; i < sband->n_channels; i++) | |
7ca43d03 | 918 | handle_channel(wiphy, initiator, band, i); |
8318d78a JB |
919 | } |
920 | ||
57b5ce07 LR |
921 | static bool reg_request_cell_base(struct regulatory_request *request) |
922 | { | |
923 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
924 | return false; | |
925 | if (request->user_reg_hint_type != NL80211_USER_REG_HINT_CELL_BASE) | |
926 | return false; | |
927 | return true; | |
928 | } | |
929 | ||
930 | bool reg_last_request_cell_base(void) | |
931 | { | |
932 | assert_cfg80211_lock(); | |
933 | ||
934 | mutex_lock(®_mutex); | |
935 | return reg_request_cell_base(last_request); | |
936 | mutex_unlock(®_mutex); | |
937 | } | |
938 | ||
939 | #ifdef CONFIG_CFG80211_CERTIFICATION_ONUS | |
940 | ||
941 | /* Core specific check */ | |
942 | static int reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
943 | { | |
944 | if (!reg_num_devs_support_basehint) | |
945 | return -EOPNOTSUPP; | |
946 | ||
947 | if (reg_request_cell_base(last_request)) { | |
948 | if (!regdom_changes(pending_request->alpha2)) | |
949 | return -EALREADY; | |
950 | return 0; | |
951 | } | |
952 | return 0; | |
953 | } | |
954 | ||
955 | /* Device specific check */ | |
956 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
957 | { | |
958 | if (!(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS)) | |
959 | return true; | |
960 | return false; | |
961 | } | |
962 | #else | |
963 | static int reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
964 | { | |
965 | return -EOPNOTSUPP; | |
966 | } | |
967 | static int reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
968 | { | |
969 | return true; | |
970 | } | |
971 | #endif | |
972 | ||
973 | ||
7db90f4a LR |
974 | static bool ignore_reg_update(struct wiphy *wiphy, |
975 | enum nl80211_reg_initiator initiator) | |
14b9815a | 976 | { |
926a0a09 | 977 | if (!last_request) { |
d91e41b6 | 978 | REG_DBG_PRINT("Ignoring regulatory request %s since " |
926a0a09 LR |
979 | "last_request is not set\n", |
980 | reg_initiator_name(initiator)); | |
14b9815a | 981 | return true; |
926a0a09 LR |
982 | } |
983 | ||
7db90f4a | 984 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
926a0a09 | 985 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { |
d91e41b6 | 986 | REG_DBG_PRINT("Ignoring regulatory request %s " |
926a0a09 | 987 | "since the driver uses its own custom " |
12c5ffb5 | 988 | "regulatory domain\n", |
926a0a09 | 989 | reg_initiator_name(initiator)); |
14b9815a | 990 | return true; |
926a0a09 LR |
991 | } |
992 | ||
fb1fc7ad LR |
993 | /* |
994 | * wiphy->regd will be set once the device has its own | |
995 | * desired regulatory domain set | |
996 | */ | |
5be83de5 | 997 | if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd && |
749b527b | 998 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
926a0a09 | 999 | !is_world_regdom(last_request->alpha2)) { |
d91e41b6 | 1000 | REG_DBG_PRINT("Ignoring regulatory request %s " |
5bc91db8 | 1001 | "since the driver requires its own regulatory " |
12c5ffb5 | 1002 | "domain to be set first\n", |
926a0a09 | 1003 | reg_initiator_name(initiator)); |
14b9815a | 1004 | return true; |
926a0a09 LR |
1005 | } |
1006 | ||
57b5ce07 LR |
1007 | if (reg_request_cell_base(last_request)) |
1008 | return reg_dev_ignore_cell_hint(wiphy); | |
1009 | ||
14b9815a LR |
1010 | return false; |
1011 | } | |
1012 | ||
e38f8a7a LR |
1013 | static void handle_reg_beacon(struct wiphy *wiphy, |
1014 | unsigned int chan_idx, | |
1015 | struct reg_beacon *reg_beacon) | |
1016 | { | |
e38f8a7a LR |
1017 | struct ieee80211_supported_band *sband; |
1018 | struct ieee80211_channel *chan; | |
6bad8766 LR |
1019 | bool channel_changed = false; |
1020 | struct ieee80211_channel chan_before; | |
e38f8a7a LR |
1021 | |
1022 | assert_cfg80211_lock(); | |
1023 | ||
1024 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1025 | chan = &sband->channels[chan_idx]; | |
1026 | ||
1027 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1028 | return; | |
1029 | ||
6bad8766 LR |
1030 | if (chan->beacon_found) |
1031 | return; | |
1032 | ||
1033 | chan->beacon_found = true; | |
1034 | ||
5be83de5 | 1035 | if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) |
37184244 LR |
1036 | return; |
1037 | ||
6bad8766 LR |
1038 | chan_before.center_freq = chan->center_freq; |
1039 | chan_before.flags = chan->flags; | |
1040 | ||
37184244 | 1041 | if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { |
e38f8a7a | 1042 | chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; |
6bad8766 | 1043 | channel_changed = true; |
e38f8a7a LR |
1044 | } |
1045 | ||
37184244 | 1046 | if (chan->flags & IEEE80211_CHAN_NO_IBSS) { |
e38f8a7a | 1047 | chan->flags &= ~IEEE80211_CHAN_NO_IBSS; |
6bad8766 | 1048 | channel_changed = true; |
e38f8a7a LR |
1049 | } |
1050 | ||
6bad8766 LR |
1051 | if (channel_changed) |
1052 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1053 | } |
1054 | ||
1055 | /* | |
1056 | * Called when a scan on a wiphy finds a beacon on | |
1057 | * new channel | |
1058 | */ | |
1059 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1060 | struct reg_beacon *reg_beacon) | |
1061 | { | |
1062 | unsigned int i; | |
1063 | struct ieee80211_supported_band *sband; | |
1064 | ||
1065 | assert_cfg80211_lock(); | |
1066 | ||
1067 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1068 | return; | |
1069 | ||
1070 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1071 | ||
1072 | for (i = 0; i < sband->n_channels; i++) | |
1073 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1074 | } | |
1075 | ||
1076 | /* | |
1077 | * Called upon reg changes or a new wiphy is added | |
1078 | */ | |
1079 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1080 | { | |
1081 | unsigned int i; | |
1082 | struct ieee80211_supported_band *sband; | |
1083 | struct reg_beacon *reg_beacon; | |
1084 | ||
1085 | assert_cfg80211_lock(); | |
1086 | ||
1087 | if (list_empty(®_beacon_list)) | |
1088 | return; | |
1089 | ||
1090 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { | |
1091 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1092 | continue; | |
1093 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1094 | for (i = 0; i < sband->n_channels; i++) | |
1095 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1096 | } | |
1097 | } | |
1098 | ||
1099 | static bool reg_is_world_roaming(struct wiphy *wiphy) | |
1100 | { | |
1101 | if (is_world_regdom(cfg80211_regdomain->alpha2) || | |
1102 | (wiphy->regd && is_world_regdom(wiphy->regd->alpha2))) | |
1103 | return true; | |
b1ed8ddd LR |
1104 | if (last_request && |
1105 | last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
5be83de5 | 1106 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) |
e38f8a7a LR |
1107 | return true; |
1108 | return false; | |
1109 | } | |
1110 | ||
1111 | /* Reap the advantages of previously found beacons */ | |
1112 | static void reg_process_beacons(struct wiphy *wiphy) | |
1113 | { | |
b1ed8ddd LR |
1114 | /* |
1115 | * Means we are just firing up cfg80211, so no beacons would | |
1116 | * have been processed yet. | |
1117 | */ | |
1118 | if (!last_request) | |
1119 | return; | |
e38f8a7a LR |
1120 | if (!reg_is_world_roaming(wiphy)) |
1121 | return; | |
1122 | wiphy_update_beacon_reg(wiphy); | |
1123 | } | |
1124 | ||
038659e7 LR |
1125 | static bool is_ht40_not_allowed(struct ieee80211_channel *chan) |
1126 | { | |
1127 | if (!chan) | |
1128 | return true; | |
1129 | if (chan->flags & IEEE80211_CHAN_DISABLED) | |
1130 | return true; | |
1131 | /* This would happen when regulatory rules disallow HT40 completely */ | |
1132 | if (IEEE80211_CHAN_NO_HT40 == (chan->flags & (IEEE80211_CHAN_NO_HT40))) | |
1133 | return true; | |
1134 | return false; | |
1135 | } | |
1136 | ||
1137 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
1138 | enum ieee80211_band band, | |
1139 | unsigned int chan_idx) | |
1140 | { | |
1141 | struct ieee80211_supported_band *sband; | |
1142 | struct ieee80211_channel *channel; | |
1143 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; | |
1144 | unsigned int i; | |
1145 | ||
1146 | assert_cfg80211_lock(); | |
1147 | ||
1148 | sband = wiphy->bands[band]; | |
1149 | BUG_ON(chan_idx >= sband->n_channels); | |
1150 | channel = &sband->channels[chan_idx]; | |
1151 | ||
1152 | if (is_ht40_not_allowed(channel)) { | |
1153 | channel->flags |= IEEE80211_CHAN_NO_HT40; | |
1154 | return; | |
1155 | } | |
1156 | ||
1157 | /* | |
1158 | * We need to ensure the extension channels exist to | |
1159 | * be able to use HT40- or HT40+, this finds them (or not) | |
1160 | */ | |
1161 | for (i = 0; i < sband->n_channels; i++) { | |
1162 | struct ieee80211_channel *c = &sband->channels[i]; | |
1163 | if (c->center_freq == (channel->center_freq - 20)) | |
1164 | channel_before = c; | |
1165 | if (c->center_freq == (channel->center_freq + 20)) | |
1166 | channel_after = c; | |
1167 | } | |
1168 | ||
1169 | /* | |
1170 | * Please note that this assumes target bandwidth is 20 MHz, | |
1171 | * if that ever changes we also need to change the below logic | |
1172 | * to include that as well. | |
1173 | */ | |
1174 | if (is_ht40_not_allowed(channel_before)) | |
689da1b3 | 1175 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1176 | else |
689da1b3 | 1177 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 LR |
1178 | |
1179 | if (is_ht40_not_allowed(channel_after)) | |
689da1b3 | 1180 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 1181 | else |
689da1b3 | 1182 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
1183 | } |
1184 | ||
1185 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
1186 | enum ieee80211_band band) | |
1187 | { | |
1188 | unsigned int i; | |
1189 | struct ieee80211_supported_band *sband; | |
1190 | ||
1191 | BUG_ON(!wiphy->bands[band]); | |
1192 | sband = wiphy->bands[band]; | |
1193 | ||
1194 | for (i = 0; i < sband->n_channels; i++) | |
1195 | reg_process_ht_flags_channel(wiphy, band, i); | |
1196 | } | |
1197 | ||
1198 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1199 | { | |
1200 | enum ieee80211_band band; | |
1201 | ||
1202 | if (!wiphy) | |
1203 | return; | |
1204 | ||
1205 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
1206 | if (wiphy->bands[band]) | |
1207 | reg_process_ht_flags_band(wiphy, band); | |
1208 | } | |
1209 | ||
1210 | } | |
1211 | ||
eac03e38 SN |
1212 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
1213 | enum nl80211_reg_initiator initiator) | |
b2e1b302 LR |
1214 | { |
1215 | enum ieee80211_band band; | |
d46e5b1d | 1216 | |
eac03e38 SN |
1217 | assert_reg_lock(); |
1218 | ||
7db90f4a | 1219 | if (ignore_reg_update(wiphy, initiator)) |
a203c2aa SN |
1220 | return; |
1221 | ||
b68e6b3b LR |
1222 | last_request->dfs_region = cfg80211_regdomain->dfs_region; |
1223 | ||
b2e1b302 | 1224 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
8318d78a | 1225 | if (wiphy->bands[band]) |
7ca43d03 | 1226 | handle_band(wiphy, band, initiator); |
b2e1b302 | 1227 | } |
a203c2aa | 1228 | |
e38f8a7a | 1229 | reg_process_beacons(wiphy); |
038659e7 | 1230 | reg_process_ht_flags(wiphy); |
560e28e1 | 1231 | if (wiphy->reg_notifier) |
716f9392 | 1232 | wiphy->reg_notifier(wiphy, last_request); |
b2e1b302 LR |
1233 | } |
1234 | ||
eac03e38 SN |
1235 | void regulatory_update(struct wiphy *wiphy, |
1236 | enum nl80211_reg_initiator setby) | |
1237 | { | |
1238 | mutex_lock(®_mutex); | |
1239 | wiphy_update_regulatory(wiphy, setby); | |
1240 | mutex_unlock(®_mutex); | |
1241 | } | |
1242 | ||
d7549cbb SN |
1243 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
1244 | { | |
1245 | struct cfg80211_registered_device *rdev; | |
4a38994f | 1246 | struct wiphy *wiphy; |
d7549cbb | 1247 | |
4a38994f RM |
1248 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1249 | wiphy = &rdev->wiphy; | |
1250 | wiphy_update_regulatory(wiphy, initiator); | |
1251 | /* | |
1252 | * Regulatory updates set by CORE are ignored for custom | |
1253 | * regulatory cards. Let us notify the changes to the driver, | |
1254 | * as some drivers used this to restore its orig_* reg domain. | |
1255 | */ | |
1256 | if (initiator == NL80211_REGDOM_SET_BY_CORE && | |
1257 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY && | |
1258 | wiphy->reg_notifier) | |
1259 | wiphy->reg_notifier(wiphy, last_request); | |
1260 | } | |
d7549cbb SN |
1261 | } |
1262 | ||
1fa25e41 LR |
1263 | static void handle_channel_custom(struct wiphy *wiphy, |
1264 | enum ieee80211_band band, | |
1265 | unsigned int chan_idx, | |
1266 | const struct ieee80211_regdomain *regd) | |
1267 | { | |
1268 | int r; | |
038659e7 LR |
1269 | u32 desired_bw_khz = MHZ_TO_KHZ(20); |
1270 | u32 bw_flags = 0; | |
1fa25e41 LR |
1271 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1272 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1273 | const struct ieee80211_freq_range *freq_range = NULL; |
1fa25e41 LR |
1274 | struct ieee80211_supported_band *sband; |
1275 | struct ieee80211_channel *chan; | |
1276 | ||
abc7381b | 1277 | assert_reg_lock(); |
ac46d48e | 1278 | |
1fa25e41 LR |
1279 | sband = wiphy->bands[band]; |
1280 | BUG_ON(chan_idx >= sband->n_channels); | |
1281 | chan = &sband->channels[chan_idx]; | |
1282 | ||
038659e7 LR |
1283 | r = freq_reg_info_regd(wiphy, |
1284 | MHZ_TO_KHZ(chan->center_freq), | |
1285 | desired_bw_khz, | |
1286 | ®_rule, | |
1287 | regd); | |
1fa25e41 LR |
1288 | |
1289 | if (r) { | |
d91e41b6 | 1290 | REG_DBG_PRINT("Disabling freq %d MHz as custom " |
a6518536 LR |
1291 | "regd has no rule that fits a %d MHz " |
1292 | "wide channel\n", | |
1293 | chan->center_freq, | |
1294 | KHZ_TO_MHZ(desired_bw_khz)); | |
1fa25e41 LR |
1295 | chan->flags = IEEE80211_CHAN_DISABLED; |
1296 | return; | |
1297 | } | |
1298 | ||
e702d3cf LR |
1299 | chan_reg_rule_print_dbg(chan, desired_bw_khz, reg_rule); |
1300 | ||
1fa25e41 | 1301 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1302 | freq_range = ®_rule->freq_range; |
1303 | ||
1304 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
1305 | bw_flags = IEEE80211_CHAN_NO_HT40; | |
1fa25e41 | 1306 | |
038659e7 | 1307 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
1fa25e41 | 1308 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
1fa25e41 LR |
1309 | chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
1310 | } | |
1311 | ||
1312 | static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band, | |
1313 | const struct ieee80211_regdomain *regd) | |
1314 | { | |
1315 | unsigned int i; | |
1316 | struct ieee80211_supported_band *sband; | |
1317 | ||
1318 | BUG_ON(!wiphy->bands[band]); | |
1319 | sband = wiphy->bands[band]; | |
1320 | ||
1321 | for (i = 0; i < sband->n_channels; i++) | |
1322 | handle_channel_custom(wiphy, band, i, regd); | |
1323 | } | |
1324 | ||
1325 | /* Used by drivers prior to wiphy registration */ | |
1326 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1327 | const struct ieee80211_regdomain *regd) | |
1328 | { | |
1329 | enum ieee80211_band band; | |
bbcf3f02 | 1330 | unsigned int bands_set = 0; |
ac46d48e | 1331 | |
abc7381b | 1332 | mutex_lock(®_mutex); |
1fa25e41 | 1333 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
bbcf3f02 LR |
1334 | if (!wiphy->bands[band]) |
1335 | continue; | |
1336 | handle_band_custom(wiphy, band, regd); | |
1337 | bands_set++; | |
b2e1b302 | 1338 | } |
abc7381b | 1339 | mutex_unlock(®_mutex); |
bbcf3f02 LR |
1340 | |
1341 | /* | |
1342 | * no point in calling this if it won't have any effect | |
1343 | * on your device's supportd bands. | |
1344 | */ | |
1345 | WARN_ON(!bands_set); | |
b2e1b302 | 1346 | } |
1fa25e41 LR |
1347 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1348 | ||
fb1fc7ad LR |
1349 | /* |
1350 | * Return value which can be used by ignore_request() to indicate | |
1351 | * it has been determined we should intersect two regulatory domains | |
1352 | */ | |
9c96477d LR |
1353 | #define REG_INTERSECT 1 |
1354 | ||
84fa4f43 JB |
1355 | /* This has the logic which determines when a new request |
1356 | * should be ignored. */ | |
2f92cd2e LR |
1357 | static int ignore_request(struct wiphy *wiphy, |
1358 | struct regulatory_request *pending_request) | |
84fa4f43 | 1359 | { |
806a9e39 | 1360 | struct wiphy *last_wiphy = NULL; |
761cf7ec LR |
1361 | |
1362 | assert_cfg80211_lock(); | |
1363 | ||
84fa4f43 JB |
1364 | /* All initial requests are respected */ |
1365 | if (!last_request) | |
1366 | return 0; | |
1367 | ||
2f92cd2e | 1368 | switch (pending_request->initiator) { |
7db90f4a | 1369 | case NL80211_REGDOM_SET_BY_CORE: |
09d989d1 | 1370 | return 0; |
7db90f4a | 1371 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
806a9e39 | 1372 | |
57b5ce07 LR |
1373 | if (reg_request_cell_base(last_request)) { |
1374 | /* Trust a Cell base station over the AP's country IE */ | |
1375 | if (regdom_changes(pending_request->alpha2)) | |
1376 | return -EOPNOTSUPP; | |
1377 | return -EALREADY; | |
1378 | } | |
1379 | ||
806a9e39 LR |
1380 | last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
1381 | ||
2f92cd2e | 1382 | if (unlikely(!is_an_alpha2(pending_request->alpha2))) |
84fa4f43 | 1383 | return -EINVAL; |
7db90f4a LR |
1384 | if (last_request->initiator == |
1385 | NL80211_REGDOM_SET_BY_COUNTRY_IE) { | |
806a9e39 | 1386 | if (last_wiphy != wiphy) { |
84fa4f43 JB |
1387 | /* |
1388 | * Two cards with two APs claiming different | |
1fe90b03 | 1389 | * Country IE alpha2s. We could |
84fa4f43 JB |
1390 | * intersect them, but that seems unlikely |
1391 | * to be correct. Reject second one for now. | |
1392 | */ | |
2f92cd2e | 1393 | if (regdom_changes(pending_request->alpha2)) |
84fa4f43 JB |
1394 | return -EOPNOTSUPP; |
1395 | return -EALREADY; | |
1396 | } | |
fb1fc7ad LR |
1397 | /* |
1398 | * Two consecutive Country IE hints on the same wiphy. | |
1399 | * This should be picked up early by the driver/stack | |
1400 | */ | |
2f92cd2e | 1401 | if (WARN_ON(regdom_changes(pending_request->alpha2))) |
84fa4f43 JB |
1402 | return 0; |
1403 | return -EALREADY; | |
1404 | } | |
a171fba4 | 1405 | return 0; |
7db90f4a LR |
1406 | case NL80211_REGDOM_SET_BY_DRIVER: |
1407 | if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) { | |
2f92cd2e | 1408 | if (regdom_changes(pending_request->alpha2)) |
e74b1e7f | 1409 | return 0; |
84fa4f43 | 1410 | return -EALREADY; |
e74b1e7f | 1411 | } |
fff32c04 LR |
1412 | |
1413 | /* | |
1414 | * This would happen if you unplug and plug your card | |
1415 | * back in or if you add a new device for which the previously | |
1416 | * loaded card also agrees on the regulatory domain. | |
1417 | */ | |
7db90f4a | 1418 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
2f92cd2e | 1419 | !regdom_changes(pending_request->alpha2)) |
fff32c04 LR |
1420 | return -EALREADY; |
1421 | ||
3e0c3ff3 | 1422 | return REG_INTERSECT; |
7db90f4a | 1423 | case NL80211_REGDOM_SET_BY_USER: |
57b5ce07 LR |
1424 | if (reg_request_cell_base(pending_request)) |
1425 | return reg_ignore_cell_hint(pending_request); | |
1426 | ||
1427 | if (reg_request_cell_base(last_request)) | |
1428 | return -EOPNOTSUPP; | |
1429 | ||
7db90f4a | 1430 | if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) |
9c96477d | 1431 | return REG_INTERSECT; |
fb1fc7ad LR |
1432 | /* |
1433 | * If the user knows better the user should set the regdom | |
1434 | * to their country before the IE is picked up | |
1435 | */ | |
7db90f4a | 1436 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER && |
3f2355cb LR |
1437 | last_request->intersect) |
1438 | return -EOPNOTSUPP; | |
fb1fc7ad LR |
1439 | /* |
1440 | * Process user requests only after previous user/driver/core | |
1441 | * requests have been processed | |
1442 | */ | |
7db90f4a LR |
1443 | if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE || |
1444 | last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1445 | last_request->initiator == NL80211_REGDOM_SET_BY_USER) { | |
69b1572b | 1446 | if (regdom_changes(last_request->alpha2)) |
5eebade6 LR |
1447 | return -EAGAIN; |
1448 | } | |
1449 | ||
baeb66fe | 1450 | if (!regdom_changes(pending_request->alpha2)) |
e74b1e7f LR |
1451 | return -EALREADY; |
1452 | ||
84fa4f43 JB |
1453 | return 0; |
1454 | } | |
1455 | ||
1456 | return -EINVAL; | |
1457 | } | |
1458 | ||
b2e253cf LR |
1459 | static void reg_set_request_processed(void) |
1460 | { | |
1461 | bool need_more_processing = false; | |
1462 | ||
1463 | last_request->processed = true; | |
1464 | ||
1465 | spin_lock(®_requests_lock); | |
1466 | if (!list_empty(®_requests_list)) | |
1467 | need_more_processing = true; | |
1468 | spin_unlock(®_requests_lock); | |
1469 | ||
a90c7a31 | 1470 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) |
fe20b39e | 1471 | cancel_delayed_work(®_timeout); |
a90c7a31 | 1472 | |
b2e253cf LR |
1473 | if (need_more_processing) |
1474 | schedule_work(®_work); | |
1475 | } | |
1476 | ||
d1c96a9a LR |
1477 | /** |
1478 | * __regulatory_hint - hint to the wireless core a regulatory domain | |
1479 | * @wiphy: if the hint comes from country information from an AP, this | |
1480 | * is required to be set to the wiphy that received the information | |
28da32d7 | 1481 | * @pending_request: the regulatory request currently being processed |
d1c96a9a LR |
1482 | * |
1483 | * The Wireless subsystem can use this function to hint to the wireless core | |
28da32d7 | 1484 | * what it believes should be the current regulatory domain. |
d1c96a9a LR |
1485 | * |
1486 | * Returns zero if all went fine, %-EALREADY if a regulatory domain had | |
1487 | * already been set or other standard error codes. | |
1488 | * | |
abc7381b | 1489 | * Caller must hold &cfg80211_mutex and ®_mutex |
d1c96a9a | 1490 | */ |
28da32d7 LR |
1491 | static int __regulatory_hint(struct wiphy *wiphy, |
1492 | struct regulatory_request *pending_request) | |
b2e1b302 | 1493 | { |
9c96477d | 1494 | bool intersect = false; |
b2e1b302 LR |
1495 | int r = 0; |
1496 | ||
761cf7ec LR |
1497 | assert_cfg80211_lock(); |
1498 | ||
2f92cd2e | 1499 | r = ignore_request(wiphy, pending_request); |
9c96477d | 1500 | |
3e0c3ff3 | 1501 | if (r == REG_INTERSECT) { |
7db90f4a LR |
1502 | if (pending_request->initiator == |
1503 | NL80211_REGDOM_SET_BY_DRIVER) { | |
3e0c3ff3 | 1504 | r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); |
d951c1dd LR |
1505 | if (r) { |
1506 | kfree(pending_request); | |
3e0c3ff3 | 1507 | return r; |
d951c1dd | 1508 | } |
3e0c3ff3 | 1509 | } |
9c96477d | 1510 | intersect = true; |
3e0c3ff3 | 1511 | } else if (r) { |
fb1fc7ad LR |
1512 | /* |
1513 | * If the regulatory domain being requested by the | |
3e0c3ff3 | 1514 | * driver has already been set just copy it to the |
fb1fc7ad LR |
1515 | * wiphy |
1516 | */ | |
28da32d7 | 1517 | if (r == -EALREADY && |
7db90f4a LR |
1518 | pending_request->initiator == |
1519 | NL80211_REGDOM_SET_BY_DRIVER) { | |
3e0c3ff3 | 1520 | r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); |
d951c1dd LR |
1521 | if (r) { |
1522 | kfree(pending_request); | |
3e0c3ff3 | 1523 | return r; |
d951c1dd | 1524 | } |
3e0c3ff3 LR |
1525 | r = -EALREADY; |
1526 | goto new_request; | |
1527 | } | |
d951c1dd | 1528 | kfree(pending_request); |
b2e1b302 | 1529 | return r; |
3e0c3ff3 | 1530 | } |
b2e1b302 | 1531 | |
3e0c3ff3 | 1532 | new_request: |
a042994d LR |
1533 | if (last_request != &core_request_world) |
1534 | kfree(last_request); | |
5203cdb6 | 1535 | |
d951c1dd LR |
1536 | last_request = pending_request; |
1537 | last_request->intersect = intersect; | |
5203cdb6 | 1538 | |
d951c1dd | 1539 | pending_request = NULL; |
3e0c3ff3 | 1540 | |
09d989d1 LR |
1541 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) { |
1542 | user_alpha2[0] = last_request->alpha2[0]; | |
1543 | user_alpha2[1] = last_request->alpha2[1]; | |
1544 | } | |
1545 | ||
3e0c3ff3 | 1546 | /* When r == REG_INTERSECT we do need to call CRDA */ |
73d54c9e LR |
1547 | if (r < 0) { |
1548 | /* | |
1549 | * Since CRDA will not be called in this case as we already | |
1550 | * have applied the requested regulatory domain before we just | |
1551 | * inform userspace we have processed the request | |
1552 | */ | |
b2e253cf | 1553 | if (r == -EALREADY) { |
73d54c9e | 1554 | nl80211_send_reg_change_event(last_request); |
b2e253cf LR |
1555 | reg_set_request_processed(); |
1556 | } | |
3e0c3ff3 | 1557 | return r; |
73d54c9e | 1558 | } |
3e0c3ff3 | 1559 | |
d951c1dd | 1560 | return call_crda(last_request->alpha2); |
b2e1b302 LR |
1561 | } |
1562 | ||
30a548c7 | 1563 | /* This processes *all* regulatory hints */ |
8848bef0 LR |
1564 | static void reg_process_hint(struct regulatory_request *reg_request, |
1565 | enum nl80211_reg_initiator reg_initiator) | |
fe33eb39 LR |
1566 | { |
1567 | int r = 0; | |
1568 | struct wiphy *wiphy = NULL; | |
1569 | ||
1570 | BUG_ON(!reg_request->alpha2); | |
1571 | ||
fe33eb39 LR |
1572 | if (wiphy_idx_valid(reg_request->wiphy_idx)) |
1573 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); | |
1574 | ||
8848bef0 | 1575 | if (reg_initiator == NL80211_REGDOM_SET_BY_DRIVER && |
fe33eb39 | 1576 | !wiphy) { |
d951c1dd | 1577 | kfree(reg_request); |
b0e2880b | 1578 | return; |
fe33eb39 LR |
1579 | } |
1580 | ||
28da32d7 | 1581 | r = __regulatory_hint(wiphy, reg_request); |
fe33eb39 | 1582 | /* This is required so that the orig_* parameters are saved */ |
5be83de5 | 1583 | if (r == -EALREADY && wiphy && |
a90c7a31 | 1584 | wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { |
8848bef0 | 1585 | wiphy_update_regulatory(wiphy, reg_initiator); |
a90c7a31 LR |
1586 | return; |
1587 | } | |
1588 | ||
1589 | /* | |
1590 | * We only time out user hints, given that they should be the only | |
1591 | * source of bogus requests. | |
1592 | */ | |
c989bb15 | 1593 | if (r != -EALREADY && |
8848bef0 | 1594 | reg_initiator == NL80211_REGDOM_SET_BY_USER) |
a90c7a31 | 1595 | schedule_delayed_work(®_timeout, msecs_to_jiffies(3142)); |
fe33eb39 LR |
1596 | } |
1597 | ||
b2e253cf LR |
1598 | /* |
1599 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
1600 | * Regulatory hints come on a first come first serve basis and we | |
1601 | * must process each one atomically. | |
1602 | */ | |
fe33eb39 | 1603 | static void reg_process_pending_hints(void) |
b0e2880b | 1604 | { |
fe33eb39 | 1605 | struct regulatory_request *reg_request; |
fe33eb39 | 1606 | |
b0e2880b LR |
1607 | mutex_lock(&cfg80211_mutex); |
1608 | mutex_lock(®_mutex); | |
1609 | ||
b2e253cf LR |
1610 | /* When last_request->processed becomes true this will be rescheduled */ |
1611 | if (last_request && !last_request->processed) { | |
1612 | REG_DBG_PRINT("Pending regulatory request, waiting " | |
12c5ffb5 | 1613 | "for it to be processed...\n"); |
b2e253cf LR |
1614 | goto out; |
1615 | } | |
1616 | ||
fe33eb39 | 1617 | spin_lock(®_requests_lock); |
fe33eb39 | 1618 | |
b2e253cf | 1619 | if (list_empty(®_requests_list)) { |
d951c1dd | 1620 | spin_unlock(®_requests_lock); |
b2e253cf | 1621 | goto out; |
fe33eb39 | 1622 | } |
b2e253cf LR |
1623 | |
1624 | reg_request = list_first_entry(®_requests_list, | |
1625 | struct regulatory_request, | |
1626 | list); | |
1627 | list_del_init(®_request->list); | |
1628 | ||
fe33eb39 | 1629 | spin_unlock(®_requests_lock); |
b0e2880b | 1630 | |
8848bef0 | 1631 | reg_process_hint(reg_request, reg_request->initiator); |
b2e253cf LR |
1632 | |
1633 | out: | |
b0e2880b LR |
1634 | mutex_unlock(®_mutex); |
1635 | mutex_unlock(&cfg80211_mutex); | |
fe33eb39 LR |
1636 | } |
1637 | ||
e38f8a7a LR |
1638 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
1639 | static void reg_process_pending_beacon_hints(void) | |
1640 | { | |
79c97e97 | 1641 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
1642 | struct reg_beacon *pending_beacon, *tmp; |
1643 | ||
abc7381b LR |
1644 | /* |
1645 | * No need to hold the reg_mutex here as we just touch wiphys | |
1646 | * and do not read or access regulatory variables. | |
1647 | */ | |
e38f8a7a LR |
1648 | mutex_lock(&cfg80211_mutex); |
1649 | ||
1650 | /* This goes through the _pending_ beacon list */ | |
1651 | spin_lock_bh(®_pending_beacons_lock); | |
1652 | ||
1653 | if (list_empty(®_pending_beacons)) { | |
1654 | spin_unlock_bh(®_pending_beacons_lock); | |
1655 | goto out; | |
1656 | } | |
1657 | ||
1658 | list_for_each_entry_safe(pending_beacon, tmp, | |
1659 | ®_pending_beacons, list) { | |
1660 | ||
1661 | list_del_init(&pending_beacon->list); | |
1662 | ||
1663 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
1664 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
1665 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
1666 | |
1667 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
1668 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
1669 | } | |
1670 | ||
1671 | spin_unlock_bh(®_pending_beacons_lock); | |
1672 | out: | |
1673 | mutex_unlock(&cfg80211_mutex); | |
1674 | } | |
1675 | ||
fe33eb39 LR |
1676 | static void reg_todo(struct work_struct *work) |
1677 | { | |
1678 | reg_process_pending_hints(); | |
e38f8a7a | 1679 | reg_process_pending_beacon_hints(); |
fe33eb39 LR |
1680 | } |
1681 | ||
fe33eb39 LR |
1682 | static void queue_regulatory_request(struct regulatory_request *request) |
1683 | { | |
c61029c7 JL |
1684 | if (isalpha(request->alpha2[0])) |
1685 | request->alpha2[0] = toupper(request->alpha2[0]); | |
1686 | if (isalpha(request->alpha2[1])) | |
1687 | request->alpha2[1] = toupper(request->alpha2[1]); | |
1688 | ||
fe33eb39 LR |
1689 | spin_lock(®_requests_lock); |
1690 | list_add_tail(&request->list, ®_requests_list); | |
1691 | spin_unlock(®_requests_lock); | |
1692 | ||
1693 | schedule_work(®_work); | |
1694 | } | |
1695 | ||
09d989d1 LR |
1696 | /* |
1697 | * Core regulatory hint -- happens during cfg80211_init() | |
1698 | * and when we restore regulatory settings. | |
1699 | */ | |
ba25c141 LR |
1700 | static int regulatory_hint_core(const char *alpha2) |
1701 | { | |
1702 | struct regulatory_request *request; | |
1703 | ||
ba25c141 LR |
1704 | request = kzalloc(sizeof(struct regulatory_request), |
1705 | GFP_KERNEL); | |
1706 | if (!request) | |
1707 | return -ENOMEM; | |
1708 | ||
1709 | request->alpha2[0] = alpha2[0]; | |
1710 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1711 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 1712 | |
31e99729 | 1713 | queue_regulatory_request(request); |
5078b2e3 | 1714 | |
fe33eb39 | 1715 | return 0; |
ba25c141 LR |
1716 | } |
1717 | ||
fe33eb39 | 1718 | /* User hints */ |
57b5ce07 LR |
1719 | int regulatory_hint_user(const char *alpha2, |
1720 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 1721 | { |
fe33eb39 LR |
1722 | struct regulatory_request *request; |
1723 | ||
be3d4810 | 1724 | BUG_ON(!alpha2); |
b2e1b302 | 1725 | |
fe33eb39 LR |
1726 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1727 | if (!request) | |
1728 | return -ENOMEM; | |
1729 | ||
1730 | request->wiphy_idx = WIPHY_IDX_STALE; | |
1731 | request->alpha2[0] = alpha2[0]; | |
1732 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 1733 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 1734 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 LR |
1735 | |
1736 | queue_regulatory_request(request); | |
1737 | ||
1738 | return 0; | |
1739 | } | |
1740 | ||
1741 | /* Driver hints */ | |
1742 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
1743 | { | |
1744 | struct regulatory_request *request; | |
1745 | ||
1746 | BUG_ON(!alpha2); | |
1747 | BUG_ON(!wiphy); | |
1748 | ||
1749 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); | |
1750 | if (!request) | |
1751 | return -ENOMEM; | |
1752 | ||
1753 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
1754 | ||
1755 | /* Must have registered wiphy first */ | |
1756 | BUG_ON(!wiphy_idx_valid(request->wiphy_idx)); | |
1757 | ||
1758 | request->alpha2[0] = alpha2[0]; | |
1759 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1760 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 LR |
1761 | |
1762 | queue_regulatory_request(request); | |
1763 | ||
1764 | return 0; | |
b2e1b302 LR |
1765 | } |
1766 | EXPORT_SYMBOL(regulatory_hint); | |
1767 | ||
4b44c8bc LR |
1768 | /* |
1769 | * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and | |
1770 | * therefore cannot iterate over the rdev list here. | |
1771 | */ | |
3f2355cb | 1772 | void regulatory_hint_11d(struct wiphy *wiphy, |
84920e3e LR |
1773 | enum ieee80211_band band, |
1774 | u8 *country_ie, | |
1775 | u8 country_ie_len) | |
3f2355cb | 1776 | { |
3f2355cb | 1777 | char alpha2[2]; |
3f2355cb | 1778 | enum environment_cap env = ENVIRON_ANY; |
fe33eb39 | 1779 | struct regulatory_request *request; |
3f2355cb | 1780 | |
abc7381b | 1781 | mutex_lock(®_mutex); |
3f2355cb | 1782 | |
9828b017 LR |
1783 | if (unlikely(!last_request)) |
1784 | goto out; | |
d335fe63 | 1785 | |
3f2355cb LR |
1786 | /* IE len must be evenly divisible by 2 */ |
1787 | if (country_ie_len & 0x01) | |
1788 | goto out; | |
1789 | ||
1790 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
1791 | goto out; | |
1792 | ||
3f2355cb LR |
1793 | alpha2[0] = country_ie[0]; |
1794 | alpha2[1] = country_ie[1]; | |
1795 | ||
1796 | if (country_ie[2] == 'I') | |
1797 | env = ENVIRON_INDOOR; | |
1798 | else if (country_ie[2] == 'O') | |
1799 | env = ENVIRON_OUTDOOR; | |
1800 | ||
fb1fc7ad | 1801 | /* |
8b19e6ca | 1802 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc LR |
1803 | * We leave conflict resolution to the workqueue, where can hold |
1804 | * cfg80211_mutex. | |
fb1fc7ad | 1805 | */ |
cc0b6fe8 LR |
1806 | if (likely(last_request->initiator == |
1807 | NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
4b44c8bc LR |
1808 | wiphy_idx_valid(last_request->wiphy_idx))) |
1809 | goto out; | |
3f2355cb | 1810 | |
fe33eb39 LR |
1811 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
1812 | if (!request) | |
f9f9b6e3 | 1813 | goto out; |
fe33eb39 | 1814 | |
fe33eb39 | 1815 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
1816 | request->alpha2[0] = alpha2[0]; |
1817 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1818 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
1819 | request->country_ie_env = env; |
1820 | ||
abc7381b | 1821 | mutex_unlock(®_mutex); |
3f2355cb | 1822 | |
fe33eb39 LR |
1823 | queue_regulatory_request(request); |
1824 | ||
1825 | return; | |
0441d6ff | 1826 | |
3f2355cb | 1827 | out: |
abc7381b | 1828 | mutex_unlock(®_mutex); |
3f2355cb | 1829 | } |
b2e1b302 | 1830 | |
09d989d1 LR |
1831 | static void restore_alpha2(char *alpha2, bool reset_user) |
1832 | { | |
1833 | /* indicates there is no alpha2 to consider for restoration */ | |
1834 | alpha2[0] = '9'; | |
1835 | alpha2[1] = '7'; | |
1836 | ||
1837 | /* The user setting has precedence over the module parameter */ | |
1838 | if (is_user_regdom_saved()) { | |
1839 | /* Unless we're asked to ignore it and reset it */ | |
1840 | if (reset_user) { | |
d91e41b6 | 1841 | REG_DBG_PRINT("Restoring regulatory settings " |
09d989d1 LR |
1842 | "including user preference\n"); |
1843 | user_alpha2[0] = '9'; | |
1844 | user_alpha2[1] = '7'; | |
1845 | ||
1846 | /* | |
1847 | * If we're ignoring user settings, we still need to | |
1848 | * check the module parameter to ensure we put things | |
1849 | * back as they were for a full restore. | |
1850 | */ | |
1851 | if (!is_world_regdom(ieee80211_regdom)) { | |
d91e41b6 | 1852 | REG_DBG_PRINT("Keeping preference on " |
09d989d1 LR |
1853 | "module parameter ieee80211_regdom: %c%c\n", |
1854 | ieee80211_regdom[0], | |
1855 | ieee80211_regdom[1]); | |
1856 | alpha2[0] = ieee80211_regdom[0]; | |
1857 | alpha2[1] = ieee80211_regdom[1]; | |
1858 | } | |
1859 | } else { | |
d91e41b6 | 1860 | REG_DBG_PRINT("Restoring regulatory settings " |
09d989d1 LR |
1861 | "while preserving user preference for: %c%c\n", |
1862 | user_alpha2[0], | |
1863 | user_alpha2[1]); | |
1864 | alpha2[0] = user_alpha2[0]; | |
1865 | alpha2[1] = user_alpha2[1]; | |
1866 | } | |
1867 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
d91e41b6 | 1868 | REG_DBG_PRINT("Keeping preference on " |
09d989d1 LR |
1869 | "module parameter ieee80211_regdom: %c%c\n", |
1870 | ieee80211_regdom[0], | |
1871 | ieee80211_regdom[1]); | |
1872 | alpha2[0] = ieee80211_regdom[0]; | |
1873 | alpha2[1] = ieee80211_regdom[1]; | |
1874 | } else | |
d91e41b6 | 1875 | REG_DBG_PRINT("Restoring regulatory settings\n"); |
09d989d1 LR |
1876 | } |
1877 | ||
5ce543d1 RM |
1878 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
1879 | { | |
1880 | struct ieee80211_supported_band *sband; | |
1881 | enum ieee80211_band band; | |
1882 | struct ieee80211_channel *chan; | |
1883 | int i; | |
1884 | ||
1885 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
1886 | sband = wiphy->bands[band]; | |
1887 | if (!sband) | |
1888 | continue; | |
1889 | for (i = 0; i < sband->n_channels; i++) { | |
1890 | chan = &sband->channels[i]; | |
1891 | chan->flags = chan->orig_flags; | |
1892 | chan->max_antenna_gain = chan->orig_mag; | |
1893 | chan->max_power = chan->orig_mpwr; | |
1894 | } | |
1895 | } | |
1896 | } | |
1897 | ||
09d989d1 LR |
1898 | /* |
1899 | * Restoring regulatory settings involves ingoring any | |
1900 | * possibly stale country IE information and user regulatory | |
1901 | * settings if so desired, this includes any beacon hints | |
1902 | * learned as we could have traveled outside to another country | |
1903 | * after disconnection. To restore regulatory settings we do | |
1904 | * exactly what we did at bootup: | |
1905 | * | |
1906 | * - send a core regulatory hint | |
1907 | * - send a user regulatory hint if applicable | |
1908 | * | |
1909 | * Device drivers that send a regulatory hint for a specific country | |
1910 | * keep their own regulatory domain on wiphy->regd so that does does | |
1911 | * not need to be remembered. | |
1912 | */ | |
1913 | static void restore_regulatory_settings(bool reset_user) | |
1914 | { | |
1915 | char alpha2[2]; | |
cee0bec5 | 1916 | char world_alpha2[2]; |
09d989d1 | 1917 | struct reg_beacon *reg_beacon, *btmp; |
14609555 LR |
1918 | struct regulatory_request *reg_request, *tmp; |
1919 | LIST_HEAD(tmp_reg_req_list); | |
5ce543d1 | 1920 | struct cfg80211_registered_device *rdev; |
09d989d1 LR |
1921 | |
1922 | mutex_lock(&cfg80211_mutex); | |
1923 | mutex_lock(®_mutex); | |
1924 | ||
a042994d | 1925 | reset_regdomains(true); |
09d989d1 LR |
1926 | restore_alpha2(alpha2, reset_user); |
1927 | ||
14609555 LR |
1928 | /* |
1929 | * If there's any pending requests we simply | |
1930 | * stash them to a temporary pending queue and | |
1931 | * add then after we've restored regulatory | |
1932 | * settings. | |
1933 | */ | |
1934 | spin_lock(®_requests_lock); | |
1935 | if (!list_empty(®_requests_list)) { | |
1936 | list_for_each_entry_safe(reg_request, tmp, | |
1937 | ®_requests_list, list) { | |
1938 | if (reg_request->initiator != | |
1939 | NL80211_REGDOM_SET_BY_USER) | |
1940 | continue; | |
1941 | list_del(®_request->list); | |
1942 | list_add_tail(®_request->list, &tmp_reg_req_list); | |
1943 | } | |
1944 | } | |
1945 | spin_unlock(®_requests_lock); | |
1946 | ||
09d989d1 LR |
1947 | /* Clear beacon hints */ |
1948 | spin_lock_bh(®_pending_beacons_lock); | |
1949 | if (!list_empty(®_pending_beacons)) { | |
1950 | list_for_each_entry_safe(reg_beacon, btmp, | |
1951 | ®_pending_beacons, list) { | |
1952 | list_del(®_beacon->list); | |
1953 | kfree(reg_beacon); | |
1954 | } | |
1955 | } | |
1956 | spin_unlock_bh(®_pending_beacons_lock); | |
1957 | ||
1958 | if (!list_empty(®_beacon_list)) { | |
1959 | list_for_each_entry_safe(reg_beacon, btmp, | |
1960 | ®_beacon_list, list) { | |
1961 | list_del(®_beacon->list); | |
1962 | kfree(reg_beacon); | |
1963 | } | |
1964 | } | |
1965 | ||
1966 | /* First restore to the basic regulatory settings */ | |
1967 | cfg80211_regdomain = cfg80211_world_regdom; | |
cee0bec5 DS |
1968 | world_alpha2[0] = cfg80211_regdomain->alpha2[0]; |
1969 | world_alpha2[1] = cfg80211_regdomain->alpha2[1]; | |
09d989d1 | 1970 | |
5ce543d1 RM |
1971 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1972 | if (rdev->wiphy.flags & WIPHY_FLAG_CUSTOM_REGULATORY) | |
1973 | restore_custom_reg_settings(&rdev->wiphy); | |
1974 | } | |
1975 | ||
09d989d1 LR |
1976 | mutex_unlock(®_mutex); |
1977 | mutex_unlock(&cfg80211_mutex); | |
1978 | ||
cee0bec5 | 1979 | regulatory_hint_core(world_alpha2); |
09d989d1 LR |
1980 | |
1981 | /* | |
1982 | * This restores the ieee80211_regdom module parameter | |
1983 | * preference or the last user requested regulatory | |
1984 | * settings, user regulatory settings takes precedence. | |
1985 | */ | |
1986 | if (is_an_alpha2(alpha2)) | |
57b5ce07 | 1987 | regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); |
09d989d1 | 1988 | |
14609555 LR |
1989 | if (list_empty(&tmp_reg_req_list)) |
1990 | return; | |
1991 | ||
1992 | mutex_lock(&cfg80211_mutex); | |
1993 | mutex_lock(®_mutex); | |
1994 | ||
1995 | spin_lock(®_requests_lock); | |
1996 | list_for_each_entry_safe(reg_request, tmp, &tmp_reg_req_list, list) { | |
1997 | REG_DBG_PRINT("Adding request for country %c%c back " | |
1998 | "into the queue\n", | |
1999 | reg_request->alpha2[0], | |
2000 | reg_request->alpha2[1]); | |
2001 | list_del(®_request->list); | |
2002 | list_add_tail(®_request->list, ®_requests_list); | |
2003 | } | |
2004 | spin_unlock(®_requests_lock); | |
2005 | ||
2006 | mutex_unlock(®_mutex); | |
2007 | mutex_unlock(&cfg80211_mutex); | |
2008 | ||
2009 | REG_DBG_PRINT("Kicking the queue\n"); | |
2010 | ||
2011 | schedule_work(®_work); | |
2012 | } | |
09d989d1 LR |
2013 | |
2014 | void regulatory_hint_disconnect(void) | |
2015 | { | |
d91e41b6 | 2016 | REG_DBG_PRINT("All devices are disconnected, going to " |
09d989d1 LR |
2017 | "restore regulatory settings\n"); |
2018 | restore_regulatory_settings(false); | |
2019 | } | |
2020 | ||
e38f8a7a LR |
2021 | static bool freq_is_chan_12_13_14(u16 freq) |
2022 | { | |
59eb21a6 BR |
2023 | if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || |
2024 | freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || | |
2025 | freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) | |
e38f8a7a LR |
2026 | return true; |
2027 | return false; | |
2028 | } | |
2029 | ||
2030 | int regulatory_hint_found_beacon(struct wiphy *wiphy, | |
2031 | struct ieee80211_channel *beacon_chan, | |
2032 | gfp_t gfp) | |
2033 | { | |
2034 | struct reg_beacon *reg_beacon; | |
2035 | ||
2036 | if (likely((beacon_chan->beacon_found || | |
2037 | (beacon_chan->flags & IEEE80211_CHAN_RADAR) || | |
2038 | (beacon_chan->band == IEEE80211_BAND_2GHZ && | |
2039 | !freq_is_chan_12_13_14(beacon_chan->center_freq))))) | |
2040 | return 0; | |
2041 | ||
2042 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
2043 | if (!reg_beacon) | |
2044 | return -ENOMEM; | |
2045 | ||
d91e41b6 | 2046 | REG_DBG_PRINT("Found new beacon on " |
4113f751 LR |
2047 | "frequency: %d MHz (Ch %d) on %s\n", |
2048 | beacon_chan->center_freq, | |
2049 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
2050 | wiphy_name(wiphy)); | |
2051 | ||
e38f8a7a LR |
2052 | memcpy(®_beacon->chan, beacon_chan, |
2053 | sizeof(struct ieee80211_channel)); | |
2054 | ||
2055 | ||
2056 | /* | |
2057 | * Since we can be called from BH or and non-BH context | |
2058 | * we must use spin_lock_bh() | |
2059 | */ | |
2060 | spin_lock_bh(®_pending_beacons_lock); | |
2061 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
2062 | spin_unlock_bh(®_pending_beacons_lock); | |
2063 | ||
2064 | schedule_work(®_work); | |
2065 | ||
2066 | return 0; | |
2067 | } | |
2068 | ||
a3d2eaf0 | 2069 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
2070 | { |
2071 | unsigned int i; | |
a3d2eaf0 JB |
2072 | const struct ieee80211_reg_rule *reg_rule = NULL; |
2073 | const struct ieee80211_freq_range *freq_range = NULL; | |
2074 | const struct ieee80211_power_rule *power_rule = NULL; | |
b2e1b302 | 2075 | |
6653325a | 2076 | pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)\n"); |
b2e1b302 LR |
2077 | |
2078 | for (i = 0; i < rd->n_reg_rules; i++) { | |
2079 | reg_rule = &rd->reg_rules[i]; | |
2080 | freq_range = ®_rule->freq_range; | |
2081 | power_rule = ®_rule->power_rule; | |
2082 | ||
fb1fc7ad LR |
2083 | /* |
2084 | * There may not be documentation for max antenna gain | |
2085 | * in certain regions | |
2086 | */ | |
b2e1b302 | 2087 | if (power_rule->max_antenna_gain) |
6653325a | 2088 | pr_info(" (%d KHz - %d KHz @ %d KHz), (%d mBi, %d mBm)\n", |
b2e1b302 LR |
2089 | freq_range->start_freq_khz, |
2090 | freq_range->end_freq_khz, | |
2091 | freq_range->max_bandwidth_khz, | |
2092 | power_rule->max_antenna_gain, | |
2093 | power_rule->max_eirp); | |
2094 | else | |
6653325a | 2095 | pr_info(" (%d KHz - %d KHz @ %d KHz), (N/A, %d mBm)\n", |
b2e1b302 LR |
2096 | freq_range->start_freq_khz, |
2097 | freq_range->end_freq_khz, | |
2098 | freq_range->max_bandwidth_khz, | |
2099 | power_rule->max_eirp); | |
2100 | } | |
2101 | } | |
2102 | ||
8b60b078 LR |
2103 | bool reg_supported_dfs_region(u8 dfs_region) |
2104 | { | |
2105 | switch (dfs_region) { | |
2106 | case NL80211_DFS_UNSET: | |
2107 | case NL80211_DFS_FCC: | |
2108 | case NL80211_DFS_ETSI: | |
2109 | case NL80211_DFS_JP: | |
2110 | return true; | |
2111 | default: | |
2112 | REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", | |
2113 | dfs_region); | |
2114 | return false; | |
2115 | } | |
2116 | } | |
2117 | ||
2118 | static void print_dfs_region(u8 dfs_region) | |
2119 | { | |
2120 | if (!dfs_region) | |
2121 | return; | |
2122 | ||
2123 | switch (dfs_region) { | |
2124 | case NL80211_DFS_FCC: | |
2125 | pr_info(" DFS Master region FCC"); | |
2126 | break; | |
2127 | case NL80211_DFS_ETSI: | |
2128 | pr_info(" DFS Master region ETSI"); | |
2129 | break; | |
2130 | case NL80211_DFS_JP: | |
2131 | pr_info(" DFS Master region JP"); | |
2132 | break; | |
2133 | default: | |
2134 | pr_info(" DFS Master region Uknown"); | |
2135 | break; | |
2136 | } | |
2137 | } | |
2138 | ||
a3d2eaf0 | 2139 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
2140 | { |
2141 | ||
3f2355cb | 2142 | if (is_intersected_alpha2(rd->alpha2)) { |
3f2355cb | 2143 | |
7db90f4a LR |
2144 | if (last_request->initiator == |
2145 | NL80211_REGDOM_SET_BY_COUNTRY_IE) { | |
79c97e97 JB |
2146 | struct cfg80211_registered_device *rdev; |
2147 | rdev = cfg80211_rdev_by_wiphy_idx( | |
806a9e39 | 2148 | last_request->wiphy_idx); |
79c97e97 | 2149 | if (rdev) { |
e9c0268f | 2150 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
2151 | rdev->country_ie_alpha2[0], |
2152 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 2153 | } else |
e9c0268f | 2154 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 2155 | } else |
e9c0268f | 2156 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 2157 | } else if (is_world_regdom(rd->alpha2)) |
e9c0268f | 2158 | pr_info("World regulatory domain updated:\n"); |
b2e1b302 LR |
2159 | else { |
2160 | if (is_unknown_alpha2(rd->alpha2)) | |
e9c0268f | 2161 | pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 LR |
2162 | else { |
2163 | if (reg_request_cell_base(last_request)) | |
2164 | pr_info("Regulatory domain changed " | |
2165 | "to country: %c%c by Cell Station\n", | |
2166 | rd->alpha2[0], rd->alpha2[1]); | |
2167 | else | |
2168 | pr_info("Regulatory domain changed " | |
2169 | "to country: %c%c\n", | |
2170 | rd->alpha2[0], rd->alpha2[1]); | |
2171 | } | |
b2e1b302 | 2172 | } |
8b60b078 | 2173 | print_dfs_region(rd->dfs_region); |
b2e1b302 LR |
2174 | print_rd_rules(rd); |
2175 | } | |
2176 | ||
2df78167 | 2177 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2178 | { |
e9c0268f | 2179 | pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
2180 | print_rd_rules(rd); |
2181 | } | |
2182 | ||
d2372b31 | 2183 | /* Takes ownership of rd only if it doesn't fail */ |
a3d2eaf0 | 2184 | static int __set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2185 | { |
9c96477d | 2186 | const struct ieee80211_regdomain *intersected_rd = NULL; |
79c97e97 | 2187 | struct cfg80211_registered_device *rdev = NULL; |
806a9e39 | 2188 | struct wiphy *request_wiphy; |
b2e1b302 LR |
2189 | /* Some basic sanity checks first */ |
2190 | ||
b2e1b302 | 2191 | if (is_world_regdom(rd->alpha2)) { |
f6037d09 | 2192 | if (WARN_ON(!reg_is_valid_request(rd->alpha2))) |
b2e1b302 LR |
2193 | return -EINVAL; |
2194 | update_world_regdomain(rd); | |
2195 | return 0; | |
2196 | } | |
b2e1b302 LR |
2197 | |
2198 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && | |
2199 | !is_unknown_alpha2(rd->alpha2)) | |
2200 | return -EINVAL; | |
2201 | ||
f6037d09 | 2202 | if (!last_request) |
b2e1b302 LR |
2203 | return -EINVAL; |
2204 | ||
fb1fc7ad LR |
2205 | /* |
2206 | * Lets only bother proceeding on the same alpha2 if the current | |
3f2355cb | 2207 | * rd is non static (it means CRDA was present and was used last) |
fb1fc7ad LR |
2208 | * and the pending request came in from a country IE |
2209 | */ | |
7db90f4a | 2210 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
fb1fc7ad LR |
2211 | /* |
2212 | * If someone else asked us to change the rd lets only bother | |
2213 | * checking if the alpha2 changes if CRDA was already called | |
2214 | */ | |
baeb66fe | 2215 | if (!regdom_changes(rd->alpha2)) |
95908535 | 2216 | return -EALREADY; |
3f2355cb LR |
2217 | } |
2218 | ||
fb1fc7ad LR |
2219 | /* |
2220 | * Now lets set the regulatory domain, update all driver channels | |
b2e1b302 LR |
2221 | * and finally inform them of what we have done, in case they want |
2222 | * to review or adjust their own settings based on their own | |
fb1fc7ad LR |
2223 | * internal EEPROM data |
2224 | */ | |
b2e1b302 | 2225 | |
f6037d09 | 2226 | if (WARN_ON(!reg_is_valid_request(rd->alpha2))) |
b2e1b302 LR |
2227 | return -EINVAL; |
2228 | ||
8375af3b | 2229 | if (!is_valid_rd(rd)) { |
e9c0268f | 2230 | pr_err("Invalid regulatory domain detected:\n"); |
8375af3b LR |
2231 | print_regdomain_info(rd); |
2232 | return -EINVAL; | |
b2e1b302 LR |
2233 | } |
2234 | ||
806a9e39 | 2235 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
0bac71af LR |
2236 | if (!request_wiphy && |
2237 | (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
2238 | last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE)) { | |
2239 | schedule_delayed_work(®_timeout, 0); | |
de3584bd JB |
2240 | return -ENODEV; |
2241 | } | |
806a9e39 | 2242 | |
b8295acd | 2243 | if (!last_request->intersect) { |
3e0c3ff3 LR |
2244 | int r; |
2245 | ||
7db90f4a | 2246 | if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) { |
a042994d | 2247 | reset_regdomains(false); |
3e0c3ff3 LR |
2248 | cfg80211_regdomain = rd; |
2249 | return 0; | |
2250 | } | |
2251 | ||
fb1fc7ad LR |
2252 | /* |
2253 | * For a driver hint, lets copy the regulatory domain the | |
2254 | * driver wanted to the wiphy to deal with conflicts | |
2255 | */ | |
3e0c3ff3 | 2256 | |
558f6d32 LR |
2257 | /* |
2258 | * Userspace could have sent two replies with only | |
2259 | * one kernel request. | |
2260 | */ | |
2261 | if (request_wiphy->regd) | |
2262 | return -EALREADY; | |
3e0c3ff3 | 2263 | |
806a9e39 | 2264 | r = reg_copy_regd(&request_wiphy->regd, rd); |
3e0c3ff3 LR |
2265 | if (r) |
2266 | return r; | |
2267 | ||
a042994d | 2268 | reset_regdomains(false); |
b8295acd LR |
2269 | cfg80211_regdomain = rd; |
2270 | return 0; | |
2271 | } | |
2272 | ||
2273 | /* Intersection requires a bit more work */ | |
2274 | ||
7db90f4a | 2275 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
b8295acd | 2276 | |
9c96477d LR |
2277 | intersected_rd = regdom_intersect(rd, cfg80211_regdomain); |
2278 | if (!intersected_rd) | |
2279 | return -EINVAL; | |
b8295acd | 2280 | |
fb1fc7ad LR |
2281 | /* |
2282 | * We can trash what CRDA provided now. | |
3e0c3ff3 | 2283 | * However if a driver requested this specific regulatory |
fb1fc7ad LR |
2284 | * domain we keep it for its private use |
2285 | */ | |
7db90f4a | 2286 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) |
806a9e39 | 2287 | request_wiphy->regd = rd; |
3e0c3ff3 LR |
2288 | else |
2289 | kfree(rd); | |
2290 | ||
b8295acd LR |
2291 | rd = NULL; |
2292 | ||
a042994d | 2293 | reset_regdomains(false); |
b8295acd LR |
2294 | cfg80211_regdomain = intersected_rd; |
2295 | ||
2296 | return 0; | |
9c96477d LR |
2297 | } |
2298 | ||
3f2355cb LR |
2299 | if (!intersected_rd) |
2300 | return -EINVAL; | |
2301 | ||
79c97e97 | 2302 | rdev = wiphy_to_dev(request_wiphy); |
3f2355cb | 2303 | |
79c97e97 JB |
2304 | rdev->country_ie_alpha2[0] = rd->alpha2[0]; |
2305 | rdev->country_ie_alpha2[1] = rd->alpha2[1]; | |
2306 | rdev->env = last_request->country_ie_env; | |
3f2355cb LR |
2307 | |
2308 | BUG_ON(intersected_rd == rd); | |
2309 | ||
2310 | kfree(rd); | |
2311 | rd = NULL; | |
2312 | ||
a042994d | 2313 | reset_regdomains(false); |
3f2355cb | 2314 | cfg80211_regdomain = intersected_rd; |
b2e1b302 LR |
2315 | |
2316 | return 0; | |
2317 | } | |
2318 | ||
2319 | ||
fb1fc7ad LR |
2320 | /* |
2321 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2322 | * multiple drivers can be ironed out later. Caller must've already |
fb1fc7ad LR |
2323 | * kmalloc'd the rd structure. Caller must hold cfg80211_mutex |
2324 | */ | |
a3d2eaf0 | 2325 | int set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2326 | { |
b2e1b302 LR |
2327 | int r; |
2328 | ||
761cf7ec LR |
2329 | assert_cfg80211_lock(); |
2330 | ||
abc7381b LR |
2331 | mutex_lock(®_mutex); |
2332 | ||
b2e1b302 LR |
2333 | /* Note that this doesn't update the wiphys, this is done below */ |
2334 | r = __set_regdom(rd); | |
d2372b31 | 2335 | if (r) { |
95908535 KV |
2336 | if (r == -EALREADY) |
2337 | reg_set_request_processed(); | |
2338 | ||
d2372b31 | 2339 | kfree(rd); |
abc7381b | 2340 | mutex_unlock(®_mutex); |
b2e1b302 | 2341 | return r; |
d2372b31 | 2342 | } |
b2e1b302 | 2343 | |
b2e1b302 | 2344 | /* This would make this whole thing pointless */ |
a01ddafd LR |
2345 | if (!last_request->intersect) |
2346 | BUG_ON(rd != cfg80211_regdomain); | |
b2e1b302 LR |
2347 | |
2348 | /* update all wiphys now with the new established regulatory domain */ | |
f6037d09 | 2349 | update_all_wiphy_regulatory(last_request->initiator); |
b2e1b302 | 2350 | |
a01ddafd | 2351 | print_regdomain(cfg80211_regdomain); |
b2e1b302 | 2352 | |
73d54c9e LR |
2353 | nl80211_send_reg_change_event(last_request); |
2354 | ||
b2e253cf LR |
2355 | reg_set_request_processed(); |
2356 | ||
abc7381b LR |
2357 | mutex_unlock(®_mutex); |
2358 | ||
b2e1b302 LR |
2359 | return r; |
2360 | } | |
2361 | ||
4d9d88d1 SJR |
2362 | #ifdef CONFIG_HOTPLUG |
2363 | int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) | |
2364 | { | |
2365 | if (last_request && !last_request->processed) { | |
2366 | if (add_uevent_var(env, "COUNTRY=%c%c", | |
2367 | last_request->alpha2[0], | |
2368 | last_request->alpha2[1])) | |
2369 | return -ENOMEM; | |
2370 | } | |
2371 | ||
2372 | return 0; | |
2373 | } | |
2374 | #else | |
2375 | int reg_device_uevent(struct device *dev, struct kobj_uevent_env *env) | |
2376 | { | |
2377 | return -ENODEV; | |
2378 | } | |
2379 | #endif /* CONFIG_HOTPLUG */ | |
2380 | ||
57b5ce07 LR |
2381 | void wiphy_regulatory_register(struct wiphy *wiphy) |
2382 | { | |
2383 | assert_cfg80211_lock(); | |
2384 | ||
2385 | mutex_lock(®_mutex); | |
2386 | ||
2387 | if (!reg_dev_ignore_cell_hint(wiphy)) | |
2388 | reg_num_devs_support_basehint++; | |
2389 | ||
2390 | mutex_unlock(®_mutex); | |
2391 | } | |
2392 | ||
a1794390 | 2393 | /* Caller must hold cfg80211_mutex */ |
bfead080 | 2394 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 2395 | { |
0ad8acaf | 2396 | struct wiphy *request_wiphy = NULL; |
806a9e39 | 2397 | |
761cf7ec LR |
2398 | assert_cfg80211_lock(); |
2399 | ||
abc7381b LR |
2400 | mutex_lock(®_mutex); |
2401 | ||
57b5ce07 LR |
2402 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2403 | reg_num_devs_support_basehint--; | |
2404 | ||
0ef9ccdd CW |
2405 | kfree(wiphy->regd); |
2406 | ||
0ad8acaf LR |
2407 | if (last_request) |
2408 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); | |
806a9e39 | 2409 | |
0ef9ccdd | 2410 | if (!request_wiphy || request_wiphy != wiphy) |
abc7381b | 2411 | goto out; |
0ef9ccdd | 2412 | |
806a9e39 | 2413 | last_request->wiphy_idx = WIPHY_IDX_STALE; |
3f2355cb | 2414 | last_request->country_ie_env = ENVIRON_ANY; |
abc7381b LR |
2415 | out: |
2416 | mutex_unlock(®_mutex); | |
3f2355cb LR |
2417 | } |
2418 | ||
a90c7a31 LR |
2419 | static void reg_timeout_work(struct work_struct *work) |
2420 | { | |
2421 | REG_DBG_PRINT("Timeout while waiting for CRDA to reply, " | |
12c5ffb5 | 2422 | "restoring regulatory settings\n"); |
a90c7a31 LR |
2423 | restore_regulatory_settings(true); |
2424 | } | |
2425 | ||
2fcc9f73 | 2426 | int __init regulatory_init(void) |
b2e1b302 | 2427 | { |
bcf4f99b | 2428 | int err = 0; |
734366de | 2429 | |
b2e1b302 LR |
2430 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
2431 | if (IS_ERR(reg_pdev)) | |
2432 | return PTR_ERR(reg_pdev); | |
734366de | 2433 | |
4d9d88d1 SJR |
2434 | reg_pdev->dev.type = ®_device_type; |
2435 | ||
fe33eb39 | 2436 | spin_lock_init(®_requests_lock); |
e38f8a7a | 2437 | spin_lock_init(®_pending_beacons_lock); |
fe33eb39 | 2438 | |
80007efe LR |
2439 | reg_regdb_size_check(); |
2440 | ||
a3d2eaf0 | 2441 | cfg80211_regdomain = cfg80211_world_regdom; |
734366de | 2442 | |
09d989d1 LR |
2443 | user_alpha2[0] = '9'; |
2444 | user_alpha2[1] = '7'; | |
2445 | ||
ae9e4b0d LR |
2446 | /* We always try to get an update for the static regdomain */ |
2447 | err = regulatory_hint_core(cfg80211_regdomain->alpha2); | |
ba25c141 | 2448 | if (err) { |
bcf4f99b LR |
2449 | if (err == -ENOMEM) |
2450 | return err; | |
2451 | /* | |
2452 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
2453 | * memory which is handled and propagated appropriately above | |
2454 | * but it can also fail during a netlink_broadcast() or during | |
2455 | * early boot for call_usermodehelper(). For now treat these | |
2456 | * errors as non-fatal. | |
2457 | */ | |
e9c0268f | 2458 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b LR |
2459 | #ifdef CONFIG_CFG80211_REG_DEBUG |
2460 | /* We want to find out exactly why when debugging */ | |
2461 | WARN_ON(err); | |
734366de | 2462 | #endif |
bcf4f99b | 2463 | } |
734366de | 2464 | |
ae9e4b0d LR |
2465 | /* |
2466 | * Finally, if the user set the module parameter treat it | |
2467 | * as a user hint. | |
2468 | */ | |
2469 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
2470 | regulatory_hint_user(ieee80211_regdom, |
2471 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 2472 | |
b2e1b302 LR |
2473 | return 0; |
2474 | } | |
2475 | ||
2fcc9f73 | 2476 | void /* __init_or_exit */ regulatory_exit(void) |
b2e1b302 | 2477 | { |
fe33eb39 | 2478 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 2479 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
2480 | |
2481 | cancel_work_sync(®_work); | |
a90c7a31 | 2482 | cancel_delayed_work_sync(®_timeout); |
fe33eb39 | 2483 | |
a1794390 | 2484 | mutex_lock(&cfg80211_mutex); |
abc7381b | 2485 | mutex_lock(®_mutex); |
734366de | 2486 | |
a042994d | 2487 | reset_regdomains(true); |
734366de | 2488 | |
58ebacc6 | 2489 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 2490 | |
b2e1b302 | 2491 | platform_device_unregister(reg_pdev); |
734366de | 2492 | |
e38f8a7a LR |
2493 | spin_lock_bh(®_pending_beacons_lock); |
2494 | if (!list_empty(®_pending_beacons)) { | |
2495 | list_for_each_entry_safe(reg_beacon, btmp, | |
2496 | ®_pending_beacons, list) { | |
2497 | list_del(®_beacon->list); | |
2498 | kfree(reg_beacon); | |
2499 | } | |
2500 | } | |
2501 | spin_unlock_bh(®_pending_beacons_lock); | |
2502 | ||
2503 | if (!list_empty(®_beacon_list)) { | |
2504 | list_for_each_entry_safe(reg_beacon, btmp, | |
2505 | ®_beacon_list, list) { | |
2506 | list_del(®_beacon->list); | |
2507 | kfree(reg_beacon); | |
2508 | } | |
2509 | } | |
2510 | ||
fe33eb39 LR |
2511 | spin_lock(®_requests_lock); |
2512 | if (!list_empty(®_requests_list)) { | |
2513 | list_for_each_entry_safe(reg_request, tmp, | |
2514 | ®_requests_list, list) { | |
2515 | list_del(®_request->list); | |
2516 | kfree(reg_request); | |
2517 | } | |
2518 | } | |
2519 | spin_unlock(®_requests_lock); | |
2520 | ||
abc7381b | 2521 | mutex_unlock(®_mutex); |
a1794390 | 2522 | mutex_unlock(&cfg80211_mutex); |
8318d78a | 2523 | } |