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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> |
2740f0cf | 6 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
4e0854a7 | 7 | * Copyright 2017 Intel Deutschland GmbH |
e646a025 | 8 | * Copyright (C) 2018 - 2019 Intel Corporation |
8318d78a | 9 | * |
3b77d5ec LR |
10 | * Permission to use, copy, modify, and/or distribute this software for any |
11 | * purpose with or without fee is hereby granted, provided that the above | |
12 | * copyright notice and this permission notice appear in all copies. | |
13 | * | |
14 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
15 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
16 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
17 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
18 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
19 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
20 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
8318d78a JB |
21 | */ |
22 | ||
3b77d5ec | 23 | |
b2e1b302 LR |
24 | /** |
25 | * DOC: Wireless regulatory infrastructure | |
8318d78a JB |
26 | * |
27 | * The usual implementation is for a driver to read a device EEPROM to | |
28 | * determine which regulatory domain it should be operating under, then | |
29 | * looking up the allowable channels in a driver-local table and finally | |
30 | * registering those channels in the wiphy structure. | |
31 | * | |
b2e1b302 LR |
32 | * Another set of compliance enforcement is for drivers to use their |
33 | * own compliance limits which can be stored on the EEPROM. The host | |
34 | * driver or firmware may ensure these are used. | |
35 | * | |
36 | * In addition to all this we provide an extra layer of regulatory | |
37 | * conformance. For drivers which do not have any regulatory | |
38 | * information CRDA provides the complete regulatory solution. | |
39 | * For others it provides a community effort on further restrictions | |
40 | * to enhance compliance. | |
41 | * | |
42 | * Note: When number of rules --> infinity we will not be able to | |
43 | * index on alpha2 any more, instead we'll probably have to | |
44 | * rely on some SHA1 checksum of the regdomain for example. | |
45 | * | |
8318d78a | 46 | */ |
e9c0268f JP |
47 | |
48 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
49 | ||
8318d78a | 50 | #include <linux/kernel.h> |
bc3b2d7f | 51 | #include <linux/export.h> |
5a0e3ad6 | 52 | #include <linux/slab.h> |
b2e1b302 | 53 | #include <linux/list.h> |
c61029c7 | 54 | #include <linux/ctype.h> |
b2e1b302 LR |
55 | #include <linux/nl80211.h> |
56 | #include <linux/platform_device.h> | |
90a53e44 | 57 | #include <linux/verification.h> |
d9b93842 | 58 | #include <linux/moduleparam.h> |
007f6c5e | 59 | #include <linux/firmware.h> |
b2e1b302 | 60 | #include <net/cfg80211.h> |
8318d78a | 61 | #include "core.h" |
b2e1b302 | 62 | #include "reg.h" |
ad932f04 | 63 | #include "rdev-ops.h" |
73d54c9e | 64 | #include "nl80211.h" |
8318d78a | 65 | |
ad932f04 AN |
66 | /* |
67 | * Grace period we give before making sure all current interfaces reside on | |
68 | * channels allowed by the current regulatory domain. | |
69 | */ | |
70 | #define REG_ENFORCE_GRACE_MS 60000 | |
71 | ||
52616f2b IP |
72 | /** |
73 | * enum reg_request_treatment - regulatory request treatment | |
74 | * | |
75 | * @REG_REQ_OK: continue processing the regulatory request | |
76 | * @REG_REQ_IGNORE: ignore the regulatory request | |
77 | * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should | |
78 | * be intersected with the current one. | |
79 | * @REG_REQ_ALREADY_SET: the regulatory request will not change the current | |
80 | * regulatory settings, and no further processing is required. | |
52616f2b | 81 | */ |
2f92212b JB |
82 | enum reg_request_treatment { |
83 | REG_REQ_OK, | |
84 | REG_REQ_IGNORE, | |
85 | REG_REQ_INTERSECT, | |
86 | REG_REQ_ALREADY_SET, | |
87 | }; | |
88 | ||
a042994d LR |
89 | static struct regulatory_request core_request_world = { |
90 | .initiator = NL80211_REGDOM_SET_BY_CORE, | |
91 | .alpha2[0] = '0', | |
92 | .alpha2[1] = '0', | |
93 | .intersect = false, | |
94 | .processed = true, | |
95 | .country_ie_env = ENVIRON_ANY, | |
96 | }; | |
97 | ||
38fd2143 JB |
98 | /* |
99 | * Receipt of information from last regulatory request, | |
100 | * protected by RTNL (and can be accessed with RCU protection) | |
101 | */ | |
c492db37 | 102 | static struct regulatory_request __rcu *last_request = |
cec3f0ed | 103 | (void __force __rcu *)&core_request_world; |
734366de | 104 | |
007f6c5e | 105 | /* To trigger userspace events and load firmware */ |
b2e1b302 | 106 | static struct platform_device *reg_pdev; |
8318d78a | 107 | |
fb1fc7ad LR |
108 | /* |
109 | * Central wireless core regulatory domains, we only need two, | |
734366de | 110 | * the current one and a world regulatory domain in case we have no |
e8da2bb4 | 111 | * information to give us an alpha2. |
38fd2143 | 112 | * (protected by RTNL, can be read under RCU) |
fb1fc7ad | 113 | */ |
458f4f9e | 114 | const struct ieee80211_regdomain __rcu *cfg80211_regdomain; |
734366de | 115 | |
57b5ce07 LR |
116 | /* |
117 | * Number of devices that registered to the core | |
118 | * that support cellular base station regulatory hints | |
38fd2143 | 119 | * (protected by RTNL) |
57b5ce07 LR |
120 | */ |
121 | static int reg_num_devs_support_basehint; | |
122 | ||
52616f2b IP |
123 | /* |
124 | * State variable indicating if the platform on which the devices | |
125 | * are attached is operating in an indoor environment. The state variable | |
126 | * is relevant for all registered devices. | |
52616f2b IP |
127 | */ |
128 | static bool reg_is_indoor; | |
05050753 I |
129 | static spinlock_t reg_indoor_lock; |
130 | ||
131 | /* Used to track the userspace process controlling the indoor setting */ | |
132 | static u32 reg_is_indoor_portid; | |
52616f2b | 133 | |
e646a025 JB |
134 | static void restore_regulatory_settings(bool reset_user, bool cached); |
135 | static void print_regdomain(const struct ieee80211_regdomain *rd); | |
c37722bd | 136 | |
458f4f9e JB |
137 | static const struct ieee80211_regdomain *get_cfg80211_regdom(void) |
138 | { | |
5bf16a11 | 139 | return rcu_dereference_rtnl(cfg80211_regdomain); |
458f4f9e JB |
140 | } |
141 | ||
ad30ca2c | 142 | const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) |
458f4f9e | 143 | { |
5bf16a11 | 144 | return rcu_dereference_rtnl(wiphy->regd); |
458f4f9e JB |
145 | } |
146 | ||
3ef121b5 LR |
147 | static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region) |
148 | { | |
149 | switch (dfs_region) { | |
150 | case NL80211_DFS_UNSET: | |
151 | return "unset"; | |
152 | case NL80211_DFS_FCC: | |
153 | return "FCC"; | |
154 | case NL80211_DFS_ETSI: | |
155 | return "ETSI"; | |
156 | case NL80211_DFS_JP: | |
157 | return "JP"; | |
158 | } | |
159 | return "Unknown"; | |
160 | } | |
161 | ||
6c474799 LR |
162 | enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy) |
163 | { | |
164 | const struct ieee80211_regdomain *regd = NULL; | |
165 | const struct ieee80211_regdomain *wiphy_regd = NULL; | |
166 | ||
167 | regd = get_cfg80211_regdom(); | |
168 | if (!wiphy) | |
169 | goto out; | |
170 | ||
171 | wiphy_regd = get_wiphy_regdom(wiphy); | |
172 | if (!wiphy_regd) | |
173 | goto out; | |
174 | ||
175 | if (wiphy_regd->dfs_region == regd->dfs_region) | |
176 | goto out; | |
177 | ||
c799ba6e JB |
178 | pr_debug("%s: device specific dfs_region (%s) disagrees with cfg80211's central dfs_region (%s)\n", |
179 | dev_name(&wiphy->dev), | |
180 | reg_dfs_region_str(wiphy_regd->dfs_region), | |
181 | reg_dfs_region_str(regd->dfs_region)); | |
6c474799 LR |
182 | |
183 | out: | |
184 | return regd->dfs_region; | |
185 | } | |
186 | ||
458f4f9e JB |
187 | static void rcu_free_regdom(const struct ieee80211_regdomain *r) |
188 | { | |
189 | if (!r) | |
190 | return; | |
191 | kfree_rcu((struct ieee80211_regdomain *)r, rcu_head); | |
192 | } | |
193 | ||
c492db37 JB |
194 | static struct regulatory_request *get_last_request(void) |
195 | { | |
38fd2143 | 196 | return rcu_dereference_rtnl(last_request); |
c492db37 JB |
197 | } |
198 | ||
e38f8a7a | 199 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
200 | static LIST_HEAD(reg_requests_list); |
201 | static spinlock_t reg_requests_lock; | |
202 | ||
e38f8a7a LR |
203 | /* Used to queue up beacon hints for review */ |
204 | static LIST_HEAD(reg_pending_beacons); | |
205 | static spinlock_t reg_pending_beacons_lock; | |
206 | ||
207 | /* Used to keep track of processed beacon hints */ | |
208 | static LIST_HEAD(reg_beacon_list); | |
209 | ||
210 | struct reg_beacon { | |
211 | struct list_head list; | |
212 | struct ieee80211_channel chan; | |
213 | }; | |
214 | ||
ad932f04 AN |
215 | static void reg_check_chans_work(struct work_struct *work); |
216 | static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work); | |
217 | ||
f333a7a2 LR |
218 | static void reg_todo(struct work_struct *work); |
219 | static DECLARE_WORK(reg_work, reg_todo); | |
220 | ||
734366de JB |
221 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
222 | static const struct ieee80211_regdomain world_regdom = { | |
28981e5e | 223 | .n_reg_rules = 8, |
734366de JB |
224 | .alpha2 = "00", |
225 | .reg_rules = { | |
68798a62 LR |
226 | /* IEEE 802.11b/g, channels 1..11 */ |
227 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
43c771a1 | 228 | /* IEEE 802.11b/g, channels 12..13. */ |
c3826807 JB |
229 | REG_RULE(2467-10, 2472+10, 20, 6, 20, |
230 | NL80211_RRF_NO_IR | NL80211_RRF_AUTO_BW), | |
611b6a82 LR |
231 | /* IEEE 802.11 channel 14 - Only JP enables |
232 | * this and for 802.11b only */ | |
233 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
8fe02e16 | 234 | NL80211_RRF_NO_IR | |
611b6a82 LR |
235 | NL80211_RRF_NO_OFDM), |
236 | /* IEEE 802.11a, channel 36..48 */ | |
c3826807 JB |
237 | REG_RULE(5180-10, 5240+10, 80, 6, 20, |
238 | NL80211_RRF_NO_IR | | |
239 | NL80211_RRF_AUTO_BW), | |
3fc71f77 | 240 | |
131a19bc | 241 | /* IEEE 802.11a, channel 52..64 - DFS required */ |
c3826807 | 242 | REG_RULE(5260-10, 5320+10, 80, 6, 20, |
8fe02e16 | 243 | NL80211_RRF_NO_IR | |
c3826807 | 244 | NL80211_RRF_AUTO_BW | |
131a19bc JB |
245 | NL80211_RRF_DFS), |
246 | ||
247 | /* IEEE 802.11a, channel 100..144 - DFS required */ | |
248 | REG_RULE(5500-10, 5720+10, 160, 6, 20, | |
8fe02e16 | 249 | NL80211_RRF_NO_IR | |
131a19bc | 250 | NL80211_RRF_DFS), |
3fc71f77 LR |
251 | |
252 | /* IEEE 802.11a, channel 149..165 */ | |
8ab9d85c | 253 | REG_RULE(5745-10, 5825+10, 80, 6, 20, |
8fe02e16 | 254 | NL80211_RRF_NO_IR), |
90cdc6df | 255 | |
8047d261 | 256 | /* IEEE 802.11ad (60GHz), channels 1..3 */ |
90cdc6df | 257 | REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), |
734366de JB |
258 | } |
259 | }; | |
260 | ||
38fd2143 | 261 | /* protected by RTNL */ |
a3d2eaf0 JB |
262 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
263 | &world_regdom; | |
734366de | 264 | |
6ee7d330 | 265 | static char *ieee80211_regdom = "00"; |
09d989d1 | 266 | static char user_alpha2[2]; |
e646a025 | 267 | static const struct ieee80211_regdomain *cfg80211_user_regdom; |
6ee7d330 | 268 | |
734366de JB |
269 | module_param(ieee80211_regdom, charp, 0444); |
270 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
271 | ||
c888393b | 272 | static void reg_free_request(struct regulatory_request *request) |
5ad6ef5e | 273 | { |
d34265a3 JB |
274 | if (request == &core_request_world) |
275 | return; | |
276 | ||
c888393b AN |
277 | if (request != get_last_request()) |
278 | kfree(request); | |
279 | } | |
280 | ||
281 | static void reg_free_last_request(void) | |
282 | { | |
283 | struct regulatory_request *lr = get_last_request(); | |
284 | ||
5ad6ef5e LR |
285 | if (lr != &core_request_world && lr) |
286 | kfree_rcu(lr, rcu_head); | |
287 | } | |
288 | ||
05f1a3ea LR |
289 | static void reg_update_last_request(struct regulatory_request *request) |
290 | { | |
255e25b0 LR |
291 | struct regulatory_request *lr; |
292 | ||
293 | lr = get_last_request(); | |
294 | if (lr == request) | |
295 | return; | |
296 | ||
c888393b | 297 | reg_free_last_request(); |
05f1a3ea LR |
298 | rcu_assign_pointer(last_request, request); |
299 | } | |
300 | ||
379b82f4 JB |
301 | static void reset_regdomains(bool full_reset, |
302 | const struct ieee80211_regdomain *new_regdom) | |
734366de | 303 | { |
458f4f9e JB |
304 | const struct ieee80211_regdomain *r; |
305 | ||
38fd2143 | 306 | ASSERT_RTNL(); |
e8da2bb4 | 307 | |
458f4f9e JB |
308 | r = get_cfg80211_regdom(); |
309 | ||
942b25cf | 310 | /* avoid freeing static information or freeing something twice */ |
458f4f9e JB |
311 | if (r == cfg80211_world_regdom) |
312 | r = NULL; | |
942b25cf JB |
313 | if (cfg80211_world_regdom == &world_regdom) |
314 | cfg80211_world_regdom = NULL; | |
458f4f9e JB |
315 | if (r == &world_regdom) |
316 | r = NULL; | |
942b25cf | 317 | |
458f4f9e JB |
318 | rcu_free_regdom(r); |
319 | rcu_free_regdom(cfg80211_world_regdom); | |
734366de | 320 | |
a3d2eaf0 | 321 | cfg80211_world_regdom = &world_regdom; |
458f4f9e | 322 | rcu_assign_pointer(cfg80211_regdomain, new_regdom); |
a042994d LR |
323 | |
324 | if (!full_reset) | |
325 | return; | |
326 | ||
05f1a3ea | 327 | reg_update_last_request(&core_request_world); |
734366de JB |
328 | } |
329 | ||
fb1fc7ad LR |
330 | /* |
331 | * Dynamic world regulatory domain requested by the wireless | |
332 | * core upon initialization | |
333 | */ | |
a3d2eaf0 | 334 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 335 | { |
c492db37 | 336 | struct regulatory_request *lr; |
734366de | 337 | |
c492db37 JB |
338 | lr = get_last_request(); |
339 | ||
340 | WARN_ON(!lr); | |
734366de | 341 | |
379b82f4 | 342 | reset_regdomains(false, rd); |
734366de JB |
343 | |
344 | cfg80211_world_regdom = rd; | |
734366de | 345 | } |
734366de | 346 | |
a3d2eaf0 | 347 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
348 | { |
349 | if (!alpha2) | |
350 | return false; | |
1a919318 | 351 | return alpha2[0] == '0' && alpha2[1] == '0'; |
b2e1b302 | 352 | } |
8318d78a | 353 | |
a3d2eaf0 | 354 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
355 | { |
356 | if (!alpha2) | |
357 | return false; | |
1a919318 | 358 | return alpha2[0] && alpha2[1]; |
b2e1b302 | 359 | } |
8318d78a | 360 | |
a3d2eaf0 | 361 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
362 | { |
363 | if (!alpha2) | |
364 | return false; | |
fb1fc7ad LR |
365 | /* |
366 | * Special case where regulatory domain was built by driver | |
367 | * but a specific alpha2 cannot be determined | |
368 | */ | |
1a919318 | 369 | return alpha2[0] == '9' && alpha2[1] == '9'; |
b2e1b302 | 370 | } |
8318d78a | 371 | |
3f2355cb LR |
372 | static bool is_intersected_alpha2(const char *alpha2) |
373 | { | |
374 | if (!alpha2) | |
375 | return false; | |
fb1fc7ad LR |
376 | /* |
377 | * Special case where regulatory domain is the | |
3f2355cb | 378 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
379 | * structures |
380 | */ | |
1a919318 | 381 | return alpha2[0] == '9' && alpha2[1] == '8'; |
3f2355cb LR |
382 | } |
383 | ||
a3d2eaf0 | 384 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
385 | { |
386 | if (!alpha2) | |
387 | return false; | |
1a919318 | 388 | return isalpha(alpha2[0]) && isalpha(alpha2[1]); |
b2e1b302 | 389 | } |
8318d78a | 390 | |
a3d2eaf0 | 391 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
392 | { |
393 | if (!alpha2_x || !alpha2_y) | |
394 | return false; | |
1a919318 | 395 | return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; |
b2e1b302 LR |
396 | } |
397 | ||
69b1572b | 398 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 399 | { |
458f4f9e | 400 | const struct ieee80211_regdomain *r = get_cfg80211_regdom(); |
761cf7ec | 401 | |
458f4f9e | 402 | if (!r) |
b2e1b302 | 403 | return true; |
458f4f9e | 404 | return !alpha2_equal(r->alpha2, alpha2); |
b2e1b302 LR |
405 | } |
406 | ||
09d989d1 LR |
407 | /* |
408 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
409 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
410 | * has ever been issued. | |
411 | */ | |
412 | static bool is_user_regdom_saved(void) | |
413 | { | |
414 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
415 | return false; | |
416 | ||
417 | /* This would indicate a mistake on the design */ | |
1a919318 | 418 | if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), |
09d989d1 | 419 | "Unexpected user alpha2: %c%c\n", |
1a919318 | 420 | user_alpha2[0], user_alpha2[1])) |
09d989d1 LR |
421 | return false; |
422 | ||
423 | return true; | |
424 | } | |
425 | ||
e9763c3c JB |
426 | static const struct ieee80211_regdomain * |
427 | reg_copy_regd(const struct ieee80211_regdomain *src_regd) | |
3b377ea9 JL |
428 | { |
429 | struct ieee80211_regdomain *regd; | |
3b377ea9 JL |
430 | unsigned int i; |
431 | ||
9f8c7136 GS |
432 | regd = kzalloc(struct_size(regd, reg_rules, src_regd->n_reg_rules), |
433 | GFP_KERNEL); | |
3b377ea9 | 434 | if (!regd) |
e9763c3c | 435 | return ERR_PTR(-ENOMEM); |
3b377ea9 JL |
436 | |
437 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
438 | ||
38cb87ee | 439 | for (i = 0; i < src_regd->n_reg_rules; i++) |
3b377ea9 | 440 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], |
e9763c3c | 441 | sizeof(struct ieee80211_reg_rule)); |
3b377ea9 | 442 | |
e9763c3c | 443 | return regd; |
3b377ea9 JL |
444 | } |
445 | ||
e646a025 JB |
446 | static void cfg80211_save_user_regdom(const struct ieee80211_regdomain *rd) |
447 | { | |
448 | ASSERT_RTNL(); | |
449 | ||
450 | if (!IS_ERR(cfg80211_user_regdom)) | |
451 | kfree(cfg80211_user_regdom); | |
452 | cfg80211_user_regdom = reg_copy_regd(rd); | |
453 | } | |
454 | ||
c7d319e5 | 455 | struct reg_regdb_apply_request { |
3b377ea9 | 456 | struct list_head list; |
c7d319e5 | 457 | const struct ieee80211_regdomain *regdom; |
3b377ea9 JL |
458 | }; |
459 | ||
c7d319e5 JB |
460 | static LIST_HEAD(reg_regdb_apply_list); |
461 | static DEFINE_MUTEX(reg_regdb_apply_mutex); | |
3b377ea9 | 462 | |
c7d319e5 | 463 | static void reg_regdb_apply(struct work_struct *work) |
3b377ea9 | 464 | { |
c7d319e5 | 465 | struct reg_regdb_apply_request *request; |
a85d0d7f | 466 | |
5fe231e8 | 467 | rtnl_lock(); |
3b377ea9 | 468 | |
c7d319e5 JB |
469 | mutex_lock(®_regdb_apply_mutex); |
470 | while (!list_empty(®_regdb_apply_list)) { | |
471 | request = list_first_entry(®_regdb_apply_list, | |
472 | struct reg_regdb_apply_request, | |
3b377ea9 JL |
473 | list); |
474 | list_del(&request->list); | |
475 | ||
c7d319e5 | 476 | set_regdom(request->regdom, REGD_SOURCE_INTERNAL_DB); |
3b377ea9 JL |
477 | kfree(request); |
478 | } | |
c7d319e5 | 479 | mutex_unlock(®_regdb_apply_mutex); |
a85d0d7f | 480 | |
5fe231e8 | 481 | rtnl_unlock(); |
3b377ea9 JL |
482 | } |
483 | ||
c7d319e5 | 484 | static DECLARE_WORK(reg_regdb_work, reg_regdb_apply); |
3b377ea9 | 485 | |
007f6c5e | 486 | static int reg_schedule_apply(const struct ieee80211_regdomain *regdom) |
3b377ea9 | 487 | { |
c7d319e5 | 488 | struct reg_regdb_apply_request *request; |
3b377ea9 | 489 | |
c7d319e5 | 490 | request = kzalloc(sizeof(struct reg_regdb_apply_request), GFP_KERNEL); |
007f6c5e JB |
491 | if (!request) { |
492 | kfree(regdom); | |
c7d319e5 JB |
493 | return -ENOMEM; |
494 | } | |
3b377ea9 | 495 | |
007f6c5e JB |
496 | request->regdom = regdom; |
497 | ||
c7d319e5 JB |
498 | mutex_lock(®_regdb_apply_mutex); |
499 | list_add_tail(&request->list, ®_regdb_apply_list); | |
500 | mutex_unlock(®_regdb_apply_mutex); | |
3b377ea9 JL |
501 | |
502 | schedule_work(®_regdb_work); | |
c7d319e5 | 503 | return 0; |
3b377ea9 | 504 | } |
80007efe | 505 | |
b6863036 JB |
506 | #ifdef CONFIG_CFG80211_CRDA_SUPPORT |
507 | /* Max number of consecutive attempts to communicate with CRDA */ | |
508 | #define REG_MAX_CRDA_TIMEOUTS 10 | |
509 | ||
510 | static u32 reg_crda_timeouts; | |
511 | ||
512 | static void crda_timeout_work(struct work_struct *work); | |
513 | static DECLARE_DELAYED_WORK(crda_timeout, crda_timeout_work); | |
514 | ||
515 | static void crda_timeout_work(struct work_struct *work) | |
516 | { | |
c799ba6e | 517 | pr_debug("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); |
b6863036 JB |
518 | rtnl_lock(); |
519 | reg_crda_timeouts++; | |
e646a025 | 520 | restore_regulatory_settings(true, false); |
b6863036 JB |
521 | rtnl_unlock(); |
522 | } | |
523 | ||
524 | static void cancel_crda_timeout(void) | |
525 | { | |
526 | cancel_delayed_work(&crda_timeout); | |
527 | } | |
528 | ||
529 | static void cancel_crda_timeout_sync(void) | |
530 | { | |
531 | cancel_delayed_work_sync(&crda_timeout); | |
532 | } | |
533 | ||
534 | static void reset_crda_timeouts(void) | |
535 | { | |
536 | reg_crda_timeouts = 0; | |
537 | } | |
538 | ||
fb1fc7ad LR |
539 | /* |
540 | * This lets us keep regulatory code which is updated on a regulatory | |
1226d258 | 541 | * basis in userspace. |
fb1fc7ad | 542 | */ |
b2e1b302 LR |
543 | static int call_crda(const char *alpha2) |
544 | { | |
1226d258 JB |
545 | char country[12]; |
546 | char *env[] = { country, NULL }; | |
c7d319e5 | 547 | int ret; |
1226d258 JB |
548 | |
549 | snprintf(country, sizeof(country), "COUNTRY=%c%c", | |
550 | alpha2[0], alpha2[1]); | |
551 | ||
c37722bd | 552 | if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) { |
042ab5fc | 553 | pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n"); |
c37722bd I |
554 | return -EINVAL; |
555 | } | |
556 | ||
b2e1b302 | 557 | if (!is_world_regdom((char *) alpha2)) |
042ab5fc | 558 | pr_debug("Calling CRDA for country: %c%c\n", |
c799ba6e | 559 | alpha2[0], alpha2[1]); |
b2e1b302 | 560 | else |
042ab5fc | 561 | pr_debug("Calling CRDA to update world regulatory domain\n"); |
b2e1b302 | 562 | |
c7d319e5 JB |
563 | ret = kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env); |
564 | if (ret) | |
565 | return ret; | |
566 | ||
567 | queue_delayed_work(system_power_efficient_wq, | |
b6863036 | 568 | &crda_timeout, msecs_to_jiffies(3142)); |
c7d319e5 | 569 | return 0; |
b2e1b302 | 570 | } |
b6863036 JB |
571 | #else |
572 | static inline void cancel_crda_timeout(void) {} | |
573 | static inline void cancel_crda_timeout_sync(void) {} | |
574 | static inline void reset_crda_timeouts(void) {} | |
575 | static inline int call_crda(const char *alpha2) | |
576 | { | |
577 | return -ENODATA; | |
578 | } | |
579 | #endif /* CONFIG_CFG80211_CRDA_SUPPORT */ | |
b2e1b302 | 580 | |
007f6c5e JB |
581 | /* code to directly load a firmware database through request_firmware */ |
582 | static const struct fwdb_header *regdb; | |
583 | ||
584 | struct fwdb_country { | |
585 | u8 alpha2[2]; | |
586 | __be16 coll_ptr; | |
587 | /* this struct cannot be extended */ | |
588 | } __packed __aligned(4); | |
589 | ||
590 | struct fwdb_collection { | |
591 | u8 len; | |
592 | u8 n_rules; | |
593 | u8 dfs_region; | |
594 | /* no optional data yet */ | |
595 | /* aligned to 2, then followed by __be16 array of rule pointers */ | |
596 | } __packed __aligned(4); | |
597 | ||
598 | enum fwdb_flags { | |
599 | FWDB_FLAG_NO_OFDM = BIT(0), | |
600 | FWDB_FLAG_NO_OUTDOOR = BIT(1), | |
601 | FWDB_FLAG_DFS = BIT(2), | |
602 | FWDB_FLAG_NO_IR = BIT(3), | |
603 | FWDB_FLAG_AUTO_BW = BIT(4), | |
604 | }; | |
605 | ||
230ebaa1 HD |
606 | struct fwdb_wmm_ac { |
607 | u8 ecw; | |
608 | u8 aifsn; | |
609 | __be16 cot; | |
610 | } __packed; | |
611 | ||
612 | struct fwdb_wmm_rule { | |
613 | struct fwdb_wmm_ac client[IEEE80211_NUM_ACS]; | |
614 | struct fwdb_wmm_ac ap[IEEE80211_NUM_ACS]; | |
615 | } __packed; | |
616 | ||
007f6c5e JB |
617 | struct fwdb_rule { |
618 | u8 len; | |
619 | u8 flags; | |
620 | __be16 max_eirp; | |
621 | __be32 start, end, max_bw; | |
622 | /* start of optional data */ | |
623 | __be16 cac_timeout; | |
230ebaa1 | 624 | __be16 wmm_ptr; |
007f6c5e JB |
625 | } __packed __aligned(4); |
626 | ||
627 | #define FWDB_MAGIC 0x52474442 | |
628 | #define FWDB_VERSION 20 | |
629 | ||
630 | struct fwdb_header { | |
631 | __be32 magic; | |
632 | __be32 version; | |
633 | struct fwdb_country country[]; | |
634 | } __packed __aligned(4); | |
635 | ||
230ebaa1 HD |
636 | static int ecw2cw(int ecw) |
637 | { | |
638 | return (1 << ecw) - 1; | |
639 | } | |
640 | ||
641 | static bool valid_wmm(struct fwdb_wmm_rule *rule) | |
642 | { | |
643 | struct fwdb_wmm_ac *ac = (struct fwdb_wmm_ac *)rule; | |
644 | int i; | |
645 | ||
646 | for (i = 0; i < IEEE80211_NUM_ACS * 2; i++) { | |
647 | u16 cw_min = ecw2cw((ac[i].ecw & 0xf0) >> 4); | |
648 | u16 cw_max = ecw2cw(ac[i].ecw & 0x0f); | |
649 | u8 aifsn = ac[i].aifsn; | |
650 | ||
651 | if (cw_min >= cw_max) | |
652 | return false; | |
653 | ||
654 | if (aifsn < 1) | |
655 | return false; | |
656 | } | |
657 | ||
658 | return true; | |
659 | } | |
660 | ||
007f6c5e JB |
661 | static bool valid_rule(const u8 *data, unsigned int size, u16 rule_ptr) |
662 | { | |
663 | struct fwdb_rule *rule = (void *)(data + (rule_ptr << 2)); | |
664 | ||
665 | if ((u8 *)rule + sizeof(rule->len) > data + size) | |
666 | return false; | |
667 | ||
668 | /* mandatory fields */ | |
669 | if (rule->len < offsetofend(struct fwdb_rule, max_bw)) | |
670 | return false; | |
230ebaa1 HD |
671 | if (rule->len >= offsetofend(struct fwdb_rule, wmm_ptr)) { |
672 | u32 wmm_ptr = be16_to_cpu(rule->wmm_ptr) << 2; | |
673 | struct fwdb_wmm_rule *wmm; | |
674 | ||
675 | if (wmm_ptr + sizeof(struct fwdb_wmm_rule) > size) | |
676 | return false; | |
007f6c5e | 677 | |
230ebaa1 HD |
678 | wmm = (void *)(data + wmm_ptr); |
679 | ||
680 | if (!valid_wmm(wmm)) | |
681 | return false; | |
682 | } | |
007f6c5e JB |
683 | return true; |
684 | } | |
685 | ||
686 | static bool valid_country(const u8 *data, unsigned int size, | |
687 | const struct fwdb_country *country) | |
688 | { | |
689 | unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2; | |
690 | struct fwdb_collection *coll = (void *)(data + ptr); | |
691 | __be16 *rules_ptr; | |
692 | unsigned int i; | |
693 | ||
694 | /* make sure we can read len/n_rules */ | |
695 | if ((u8 *)coll + offsetofend(typeof(*coll), n_rules) > data + size) | |
696 | return false; | |
697 | ||
698 | /* make sure base struct and all rules fit */ | |
699 | if ((u8 *)coll + ALIGN(coll->len, 2) + | |
700 | (coll->n_rules * 2) > data + size) | |
701 | return false; | |
702 | ||
703 | /* mandatory fields must exist */ | |
704 | if (coll->len < offsetofend(struct fwdb_collection, dfs_region)) | |
705 | return false; | |
706 | ||
707 | rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2)); | |
708 | ||
709 | for (i = 0; i < coll->n_rules; i++) { | |
710 | u16 rule_ptr = be16_to_cpu(rules_ptr[i]); | |
711 | ||
712 | if (!valid_rule(data, size, rule_ptr)) | |
713 | return false; | |
714 | } | |
715 | ||
716 | return true; | |
717 | } | |
718 | ||
90a53e44 JB |
719 | #ifdef CONFIG_CFG80211_REQUIRE_SIGNED_REGDB |
720 | static struct key *builtin_regdb_keys; | |
721 | ||
722 | static void __init load_keys_from_buffer(const u8 *p, unsigned int buflen) | |
723 | { | |
724 | const u8 *end = p + buflen; | |
725 | size_t plen; | |
726 | key_ref_t key; | |
727 | ||
728 | while (p < end) { | |
729 | /* Each cert begins with an ASN.1 SEQUENCE tag and must be more | |
730 | * than 256 bytes in size. | |
731 | */ | |
732 | if (end - p < 4) | |
733 | goto dodgy_cert; | |
734 | if (p[0] != 0x30 && | |
735 | p[1] != 0x82) | |
736 | goto dodgy_cert; | |
737 | plen = (p[2] << 8) | p[3]; | |
738 | plen += 4; | |
739 | if (plen > end - p) | |
740 | goto dodgy_cert; | |
741 | ||
742 | key = key_create_or_update(make_key_ref(builtin_regdb_keys, 1), | |
743 | "asymmetric", NULL, p, plen, | |
028db3e2 LT |
744 | ((KEY_POS_ALL & ~KEY_POS_SETATTR) | |
745 | KEY_USR_VIEW | KEY_USR_READ), | |
90a53e44 JB |
746 | KEY_ALLOC_NOT_IN_QUOTA | |
747 | KEY_ALLOC_BUILT_IN | | |
748 | KEY_ALLOC_BYPASS_RESTRICTION); | |
749 | if (IS_ERR(key)) { | |
750 | pr_err("Problem loading in-kernel X.509 certificate (%ld)\n", | |
751 | PTR_ERR(key)); | |
752 | } else { | |
753 | pr_notice("Loaded X.509 cert '%s'\n", | |
754 | key_ref_to_ptr(key)->description); | |
755 | key_ref_put(key); | |
756 | } | |
757 | p += plen; | |
758 | } | |
759 | ||
760 | return; | |
761 | ||
762 | dodgy_cert: | |
763 | pr_err("Problem parsing in-kernel X.509 certificate list\n"); | |
764 | } | |
765 | ||
766 | static int __init load_builtin_regdb_keys(void) | |
767 | { | |
768 | builtin_regdb_keys = | |
769 | keyring_alloc(".builtin_regdb_keys", | |
770 | KUIDT_INIT(0), KGIDT_INIT(0), current_cred(), | |
028db3e2 LT |
771 | ((KEY_POS_ALL & ~KEY_POS_SETATTR) | |
772 | KEY_USR_VIEW | KEY_USR_READ | KEY_USR_SEARCH), | |
90a53e44 JB |
773 | KEY_ALLOC_NOT_IN_QUOTA, NULL, NULL); |
774 | if (IS_ERR(builtin_regdb_keys)) | |
775 | return PTR_ERR(builtin_regdb_keys); | |
776 | ||
777 | pr_notice("Loading compiled-in X.509 certificates for regulatory database\n"); | |
778 | ||
779 | #ifdef CONFIG_CFG80211_USE_KERNEL_REGDB_KEYS | |
780 | load_keys_from_buffer(shipped_regdb_certs, shipped_regdb_certs_len); | |
781 | #endif | |
88230ef1 | 782 | #ifdef CONFIG_CFG80211_EXTRA_REGDB_KEYDIR |
90a53e44 JB |
783 | if (CONFIG_CFG80211_EXTRA_REGDB_KEYDIR[0] != '\0') |
784 | load_keys_from_buffer(extra_regdb_certs, extra_regdb_certs_len); | |
785 | #endif | |
786 | ||
787 | return 0; | |
788 | } | |
789 | ||
790 | static bool regdb_has_valid_signature(const u8 *data, unsigned int size) | |
791 | { | |
792 | const struct firmware *sig; | |
793 | bool result; | |
794 | ||
795 | if (request_firmware(&sig, "regulatory.db.p7s", ®_pdev->dev)) | |
796 | return false; | |
797 | ||
798 | result = verify_pkcs7_signature(data, size, sig->data, sig->size, | |
799 | builtin_regdb_keys, | |
800 | VERIFYING_UNSPECIFIED_SIGNATURE, | |
801 | NULL, NULL) == 0; | |
802 | ||
803 | release_firmware(sig); | |
804 | ||
805 | return result; | |
806 | } | |
807 | ||
808 | static void free_regdb_keyring(void) | |
809 | { | |
810 | key_put(builtin_regdb_keys); | |
811 | } | |
812 | #else | |
813 | static int load_builtin_regdb_keys(void) | |
814 | { | |
815 | return 0; | |
816 | } | |
817 | ||
818 | static bool regdb_has_valid_signature(const u8 *data, unsigned int size) | |
819 | { | |
820 | return true; | |
821 | } | |
822 | ||
823 | static void free_regdb_keyring(void) | |
824 | { | |
825 | } | |
826 | #endif /* CONFIG_CFG80211_REQUIRE_SIGNED_REGDB */ | |
827 | ||
007f6c5e JB |
828 | static bool valid_regdb(const u8 *data, unsigned int size) |
829 | { | |
830 | const struct fwdb_header *hdr = (void *)data; | |
831 | const struct fwdb_country *country; | |
832 | ||
833 | if (size < sizeof(*hdr)) | |
834 | return false; | |
835 | ||
836 | if (hdr->magic != cpu_to_be32(FWDB_MAGIC)) | |
837 | return false; | |
838 | ||
839 | if (hdr->version != cpu_to_be32(FWDB_VERSION)) | |
840 | return false; | |
841 | ||
90a53e44 JB |
842 | if (!regdb_has_valid_signature(data, size)) |
843 | return false; | |
844 | ||
007f6c5e JB |
845 | country = &hdr->country[0]; |
846 | while ((u8 *)(country + 1) <= data + size) { | |
847 | if (!country->coll_ptr) | |
848 | break; | |
849 | if (!valid_country(data, size, country)) | |
850 | return false; | |
851 | country++; | |
852 | } | |
853 | ||
854 | return true; | |
855 | } | |
856 | ||
014f5a25 SG |
857 | static void set_wmm_rule(const struct fwdb_header *db, |
858 | const struct fwdb_country *country, | |
859 | const struct fwdb_rule *rule, | |
860 | struct ieee80211_reg_rule *rrule) | |
861 | { | |
862 | struct ieee80211_wmm_rule *wmm_rule = &rrule->wmm_rule; | |
863 | struct fwdb_wmm_rule *wmm; | |
864 | unsigned int i, wmm_ptr; | |
865 | ||
866 | wmm_ptr = be16_to_cpu(rule->wmm_ptr) << 2; | |
867 | wmm = (void *)((u8 *)db + wmm_ptr); | |
868 | ||
869 | if (!valid_wmm(wmm)) { | |
870 | pr_err("Invalid regulatory WMM rule %u-%u in domain %c%c\n", | |
871 | be32_to_cpu(rule->start), be32_to_cpu(rule->end), | |
872 | country->alpha2[0], country->alpha2[1]); | |
873 | return; | |
874 | } | |
230ebaa1 HD |
875 | |
876 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { | |
014f5a25 | 877 | wmm_rule->client[i].cw_min = |
230ebaa1 | 878 | ecw2cw((wmm->client[i].ecw & 0xf0) >> 4); |
014f5a25 SG |
879 | wmm_rule->client[i].cw_max = ecw2cw(wmm->client[i].ecw & 0x0f); |
880 | wmm_rule->client[i].aifsn = wmm->client[i].aifsn; | |
881 | wmm_rule->client[i].cot = | |
882 | 1000 * be16_to_cpu(wmm->client[i].cot); | |
883 | wmm_rule->ap[i].cw_min = ecw2cw((wmm->ap[i].ecw & 0xf0) >> 4); | |
884 | wmm_rule->ap[i].cw_max = ecw2cw(wmm->ap[i].ecw & 0x0f); | |
885 | wmm_rule->ap[i].aifsn = wmm->ap[i].aifsn; | |
886 | wmm_rule->ap[i].cot = 1000 * be16_to_cpu(wmm->ap[i].cot); | |
230ebaa1 | 887 | } |
38cb87ee SG |
888 | |
889 | rrule->has_wmm = true; | |
230ebaa1 HD |
890 | } |
891 | ||
19d3577e HD |
892 | static int __regdb_query_wmm(const struct fwdb_header *db, |
893 | const struct fwdb_country *country, int freq, | |
014f5a25 | 894 | struct ieee80211_reg_rule *rrule) |
19d3577e HD |
895 | { |
896 | unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2; | |
897 | struct fwdb_collection *coll = (void *)((u8 *)db + ptr); | |
898 | int i; | |
899 | ||
900 | for (i = 0; i < coll->n_rules; i++) { | |
901 | __be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2)); | |
902 | unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2; | |
014f5a25 | 903 | struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr); |
19d3577e | 904 | |
014f5a25 | 905 | if (rule->len < offsetofend(struct fwdb_rule, wmm_ptr)) |
19d3577e HD |
906 | continue; |
907 | ||
014f5a25 SG |
908 | if (freq >= KHZ_TO_MHZ(be32_to_cpu(rule->start)) && |
909 | freq <= KHZ_TO_MHZ(be32_to_cpu(rule->end))) { | |
910 | set_wmm_rule(db, country, rule, rrule); | |
19d3577e HD |
911 | return 0; |
912 | } | |
913 | } | |
914 | ||
915 | return -ENODATA; | |
916 | } | |
917 | ||
38cb87ee | 918 | int reg_query_regdb_wmm(char *alpha2, int freq, struct ieee80211_reg_rule *rule) |
19d3577e HD |
919 | { |
920 | const struct fwdb_header *hdr = regdb; | |
921 | const struct fwdb_country *country; | |
922 | ||
5247a77c HD |
923 | if (!regdb) |
924 | return -ENODATA; | |
925 | ||
19d3577e HD |
926 | if (IS_ERR(regdb)) |
927 | return PTR_ERR(regdb); | |
928 | ||
929 | country = &hdr->country[0]; | |
930 | while (country->coll_ptr) { | |
931 | if (alpha2_equal(alpha2, country->alpha2)) | |
38cb87ee | 932 | return __regdb_query_wmm(regdb, country, freq, rule); |
19d3577e HD |
933 | |
934 | country++; | |
935 | } | |
936 | ||
937 | return -ENODATA; | |
938 | } | |
939 | EXPORT_SYMBOL(reg_query_regdb_wmm); | |
940 | ||
007f6c5e JB |
941 | static int regdb_query_country(const struct fwdb_header *db, |
942 | const struct fwdb_country *country) | |
943 | { | |
944 | unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2; | |
945 | struct fwdb_collection *coll = (void *)((u8 *)db + ptr); | |
946 | struct ieee80211_regdomain *regdom; | |
9f8c7136 | 947 | unsigned int i; |
007f6c5e | 948 | |
9f8c7136 GS |
949 | regdom = kzalloc(struct_size(regdom, reg_rules, coll->n_rules), |
950 | GFP_KERNEL); | |
007f6c5e JB |
951 | if (!regdom) |
952 | return -ENOMEM; | |
953 | ||
954 | regdom->n_reg_rules = coll->n_rules; | |
955 | regdom->alpha2[0] = country->alpha2[0]; | |
956 | regdom->alpha2[1] = country->alpha2[1]; | |
957 | regdom->dfs_region = coll->dfs_region; | |
958 | ||
959 | for (i = 0; i < regdom->n_reg_rules; i++) { | |
960 | __be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2)); | |
961 | unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2; | |
962 | struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr); | |
963 | struct ieee80211_reg_rule *rrule = ®dom->reg_rules[i]; | |
964 | ||
965 | rrule->freq_range.start_freq_khz = be32_to_cpu(rule->start); | |
966 | rrule->freq_range.end_freq_khz = be32_to_cpu(rule->end); | |
967 | rrule->freq_range.max_bandwidth_khz = be32_to_cpu(rule->max_bw); | |
968 | ||
969 | rrule->power_rule.max_antenna_gain = 0; | |
970 | rrule->power_rule.max_eirp = be16_to_cpu(rule->max_eirp); | |
971 | ||
972 | rrule->flags = 0; | |
973 | if (rule->flags & FWDB_FLAG_NO_OFDM) | |
974 | rrule->flags |= NL80211_RRF_NO_OFDM; | |
975 | if (rule->flags & FWDB_FLAG_NO_OUTDOOR) | |
976 | rrule->flags |= NL80211_RRF_NO_OUTDOOR; | |
977 | if (rule->flags & FWDB_FLAG_DFS) | |
978 | rrule->flags |= NL80211_RRF_DFS; | |
979 | if (rule->flags & FWDB_FLAG_NO_IR) | |
980 | rrule->flags |= NL80211_RRF_NO_IR; | |
981 | if (rule->flags & FWDB_FLAG_AUTO_BW) | |
982 | rrule->flags |= NL80211_RRF_AUTO_BW; | |
983 | ||
984 | rrule->dfs_cac_ms = 0; | |
985 | ||
986 | /* handle optional data */ | |
987 | if (rule->len >= offsetofend(struct fwdb_rule, cac_timeout)) | |
988 | rrule->dfs_cac_ms = | |
989 | 1000 * be16_to_cpu(rule->cac_timeout); | |
014f5a25 SG |
990 | if (rule->len >= offsetofend(struct fwdb_rule, wmm_ptr)) |
991 | set_wmm_rule(db, country, rule, rrule); | |
007f6c5e JB |
992 | } |
993 | ||
994 | return reg_schedule_apply(regdom); | |
995 | } | |
996 | ||
997 | static int query_regdb(const char *alpha2) | |
998 | { | |
999 | const struct fwdb_header *hdr = regdb; | |
1000 | const struct fwdb_country *country; | |
1001 | ||
1ea4ff3e JB |
1002 | ASSERT_RTNL(); |
1003 | ||
007f6c5e JB |
1004 | if (IS_ERR(regdb)) |
1005 | return PTR_ERR(regdb); | |
1006 | ||
1007 | country = &hdr->country[0]; | |
1008 | while (country->coll_ptr) { | |
1009 | if (alpha2_equal(alpha2, country->alpha2)) | |
1010 | return regdb_query_country(regdb, country); | |
1011 | country++; | |
1012 | } | |
1013 | ||
1014 | return -ENODATA; | |
1015 | } | |
1016 | ||
1017 | static void regdb_fw_cb(const struct firmware *fw, void *context) | |
1018 | { | |
1ea4ff3e JB |
1019 | int set_error = 0; |
1020 | bool restore = true; | |
007f6c5e JB |
1021 | void *db; |
1022 | ||
1023 | if (!fw) { | |
1024 | pr_info("failed to load regulatory.db\n"); | |
1ea4ff3e JB |
1025 | set_error = -ENODATA; |
1026 | } else if (!valid_regdb(fw->data, fw->size)) { | |
90a53e44 | 1027 | pr_info("loaded regulatory.db is malformed or signature is missing/invalid\n"); |
1ea4ff3e | 1028 | set_error = -EINVAL; |
007f6c5e JB |
1029 | } |
1030 | ||
1ea4ff3e | 1031 | rtnl_lock(); |
faae54ad CT |
1032 | if (regdb && !IS_ERR(regdb)) { |
1033 | /* negative case - a bug | |
1034 | * positive case - can happen due to race in case of multiple cb's in | |
1035 | * queue, due to usage of asynchronous callback | |
1036 | * | |
1037 | * Either case, just restore and free new db. | |
1038 | */ | |
1ea4ff3e JB |
1039 | } else if (set_error) { |
1040 | regdb = ERR_PTR(set_error); | |
1041 | } else if (fw) { | |
1042 | db = kmemdup(fw->data, fw->size, GFP_KERNEL); | |
1043 | if (db) { | |
1044 | regdb = db; | |
1045 | restore = context && query_regdb(context); | |
1046 | } else { | |
1047 | restore = true; | |
1048 | } | |
007f6c5e JB |
1049 | } |
1050 | ||
1ea4ff3e | 1051 | if (restore) |
e646a025 | 1052 | restore_regulatory_settings(true, false); |
007f6c5e | 1053 | |
007f6c5e | 1054 | rtnl_unlock(); |
1ea4ff3e | 1055 | |
007f6c5e | 1056 | kfree(context); |
1ea4ff3e JB |
1057 | |
1058 | release_firmware(fw); | |
007f6c5e JB |
1059 | } |
1060 | ||
1061 | static int query_regdb_file(const char *alpha2) | |
1062 | { | |
1ea4ff3e JB |
1063 | ASSERT_RTNL(); |
1064 | ||
007f6c5e JB |
1065 | if (regdb) |
1066 | return query_regdb(alpha2); | |
1067 | ||
1068 | alpha2 = kmemdup(alpha2, 2, GFP_KERNEL); | |
1069 | if (!alpha2) | |
1070 | return -ENOMEM; | |
1071 | ||
1072 | return request_firmware_nowait(THIS_MODULE, true, "regulatory.db", | |
1073 | ®_pdev->dev, GFP_KERNEL, | |
1074 | (void *)alpha2, regdb_fw_cb); | |
1075 | } | |
1076 | ||
1ea4ff3e JB |
1077 | int reg_reload_regdb(void) |
1078 | { | |
1079 | const struct firmware *fw; | |
1080 | void *db; | |
1081 | int err; | |
1082 | ||
1083 | err = request_firmware(&fw, "regulatory.db", ®_pdev->dev); | |
1084 | if (err) | |
1085 | return err; | |
1086 | ||
1087 | if (!valid_regdb(fw->data, fw->size)) { | |
1088 | err = -ENODATA; | |
1089 | goto out; | |
1090 | } | |
1091 | ||
1092 | db = kmemdup(fw->data, fw->size, GFP_KERNEL); | |
1093 | if (!db) { | |
1094 | err = -ENOMEM; | |
1095 | goto out; | |
1096 | } | |
1097 | ||
1098 | rtnl_lock(); | |
1099 | if (!IS_ERR_OR_NULL(regdb)) | |
1100 | kfree(regdb); | |
1101 | regdb = db; | |
1102 | rtnl_unlock(); | |
1103 | ||
1104 | out: | |
1105 | release_firmware(fw); | |
1106 | return err; | |
1107 | } | |
1108 | ||
cecbb069 | 1109 | static bool reg_query_database(struct regulatory_request *request) |
fe6631ff | 1110 | { |
007f6c5e JB |
1111 | if (query_regdb_file(request->alpha2) == 0) |
1112 | return true; | |
1113 | ||
c7d319e5 JB |
1114 | if (call_crda(request->alpha2) == 0) |
1115 | return true; | |
1116 | ||
1117 | return false; | |
fe6631ff LR |
1118 | } |
1119 | ||
e438768f | 1120 | bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 1121 | { |
c492db37 | 1122 | struct regulatory_request *lr = get_last_request(); |
61405e97 | 1123 | |
c492db37 | 1124 | if (!lr || lr->processed) |
f6037d09 JB |
1125 | return false; |
1126 | ||
c492db37 | 1127 | return alpha2_equal(lr->alpha2, alpha2); |
b2e1b302 | 1128 | } |
8318d78a | 1129 | |
e3961af1 JD |
1130 | static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy) |
1131 | { | |
1132 | struct regulatory_request *lr = get_last_request(); | |
1133 | ||
1134 | /* | |
1135 | * Follow the driver's regulatory domain, if present, unless a country | |
1136 | * IE has been processed or a user wants to help complaince further | |
1137 | */ | |
1138 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
1139 | lr->initiator != NL80211_REGDOM_SET_BY_USER && | |
1140 | wiphy->regd) | |
1141 | return get_wiphy_regdom(wiphy); | |
1142 | ||
1143 | return get_cfg80211_regdom(); | |
1144 | } | |
1145 | ||
a6d4a534 AN |
1146 | static unsigned int |
1147 | reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd, | |
1148 | const struct ieee80211_reg_rule *rule) | |
97524820 JD |
1149 | { |
1150 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; | |
1151 | const struct ieee80211_freq_range *freq_range_tmp; | |
1152 | const struct ieee80211_reg_rule *tmp; | |
1153 | u32 start_freq, end_freq, idx, no; | |
1154 | ||
1155 | for (idx = 0; idx < rd->n_reg_rules; idx++) | |
1156 | if (rule == &rd->reg_rules[idx]) | |
1157 | break; | |
1158 | ||
1159 | if (idx == rd->n_reg_rules) | |
1160 | return 0; | |
1161 | ||
1162 | /* get start_freq */ | |
1163 | no = idx; | |
1164 | ||
1165 | while (no) { | |
1166 | tmp = &rd->reg_rules[--no]; | |
1167 | freq_range_tmp = &tmp->freq_range; | |
1168 | ||
1169 | if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz) | |
1170 | break; | |
1171 | ||
97524820 JD |
1172 | freq_range = freq_range_tmp; |
1173 | } | |
1174 | ||
1175 | start_freq = freq_range->start_freq_khz; | |
1176 | ||
1177 | /* get end_freq */ | |
1178 | freq_range = &rule->freq_range; | |
1179 | no = idx; | |
1180 | ||
1181 | while (no < rd->n_reg_rules - 1) { | |
1182 | tmp = &rd->reg_rules[++no]; | |
1183 | freq_range_tmp = &tmp->freq_range; | |
1184 | ||
1185 | if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz) | |
1186 | break; | |
1187 | ||
97524820 JD |
1188 | freq_range = freq_range_tmp; |
1189 | } | |
1190 | ||
1191 | end_freq = freq_range->end_freq_khz; | |
1192 | ||
1193 | return end_freq - start_freq; | |
1194 | } | |
1195 | ||
a6d4a534 AN |
1196 | unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd, |
1197 | const struct ieee80211_reg_rule *rule) | |
1198 | { | |
1199 | unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule); | |
1200 | ||
1201 | if (rule->flags & NL80211_RRF_NO_160MHZ) | |
1202 | bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80)); | |
1203 | if (rule->flags & NL80211_RRF_NO_80MHZ) | |
1204 | bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40)); | |
1205 | ||
1206 | /* | |
1207 | * HT40+/HT40- limits are handled per-channel. Only limit BW if both | |
1208 | * are not allowed. | |
1209 | */ | |
1210 | if (rule->flags & NL80211_RRF_NO_HT40MINUS && | |
1211 | rule->flags & NL80211_RRF_NO_HT40PLUS) | |
1212 | bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20)); | |
1213 | ||
1214 | return bw; | |
1215 | } | |
1216 | ||
b2e1b302 | 1217 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 1218 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 1219 | { |
a3d2eaf0 | 1220 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
1221 | u32 freq_diff; |
1222 | ||
91e99004 | 1223 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
1224 | return false; |
1225 | ||
1226 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
1227 | return false; | |
1228 | ||
1229 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
1230 | ||
bd05f28e | 1231 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
1a919318 | 1232 | freq_range->max_bandwidth_khz > freq_diff) |
b2e1b302 LR |
1233 | return false; |
1234 | ||
1235 | return true; | |
1236 | } | |
1237 | ||
a3d2eaf0 | 1238 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 1239 | { |
a3d2eaf0 | 1240 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 1241 | unsigned int i; |
8318d78a | 1242 | |
b2e1b302 LR |
1243 | if (!rd->n_reg_rules) |
1244 | return false; | |
8318d78a | 1245 | |
88dc1c3f LR |
1246 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
1247 | return false; | |
1248 | ||
b2e1b302 LR |
1249 | for (i = 0; i < rd->n_reg_rules; i++) { |
1250 | reg_rule = &rd->reg_rules[i]; | |
1251 | if (!is_valid_reg_rule(reg_rule)) | |
1252 | return false; | |
1253 | } | |
1254 | ||
1255 | return true; | |
8318d78a JB |
1256 | } |
1257 | ||
0c7dc45d LR |
1258 | /** |
1259 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
1260 | * @freq_range: frequency rule we want to query | |
1261 | * @freq_khz: frequency we are inquiring about | |
1262 | * | |
1263 | * This lets us know if a specific frequency rule is or is not relevant to | |
1264 | * a specific frequency's band. Bands are device specific and artificial | |
64629b9d VK |
1265 | * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), |
1266 | * however it is safe for now to assume that a frequency rule should not be | |
1267 | * part of a frequency's band if the start freq or end freq are off by more | |
93183bdb | 1268 | * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 20 GHz for the |
64629b9d | 1269 | * 60 GHz band. |
0c7dc45d LR |
1270 | * This resolution can be lowered and should be considered as we add |
1271 | * regulatory rule support for other "bands". | |
1272 | **/ | |
1273 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
1a919318 | 1274 | u32 freq_khz) |
0c7dc45d LR |
1275 | { |
1276 | #define ONE_GHZ_IN_KHZ 1000000 | |
64629b9d VK |
1277 | /* |
1278 | * From 802.11ad: directional multi-gigabit (DMG): | |
1279 | * Pertaining to operation in a frequency band containing a channel | |
1280 | * with the Channel starting frequency above 45 GHz. | |
1281 | */ | |
1282 | u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? | |
93183bdb | 1283 | 20 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; |
64629b9d | 1284 | if (abs(freq_khz - freq_range->start_freq_khz) <= limit) |
0c7dc45d | 1285 | return true; |
64629b9d | 1286 | if (abs(freq_khz - freq_range->end_freq_khz) <= limit) |
0c7dc45d LR |
1287 | return true; |
1288 | return false; | |
1289 | #undef ONE_GHZ_IN_KHZ | |
1290 | } | |
1291 | ||
adbfb058 LR |
1292 | /* |
1293 | * Later on we can perhaps use the more restrictive DFS | |
1294 | * region but we don't have information for that yet so | |
1295 | * for now simply disallow conflicts. | |
1296 | */ | |
1297 | static enum nl80211_dfs_regions | |
1298 | reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1, | |
1299 | const enum nl80211_dfs_regions dfs_region2) | |
1300 | { | |
1301 | if (dfs_region1 != dfs_region2) | |
1302 | return NL80211_DFS_UNSET; | |
1303 | return dfs_region1; | |
1304 | } | |
1305 | ||
08a75a88 IP |
1306 | static void reg_wmm_rules_intersect(const struct ieee80211_wmm_ac *wmm_ac1, |
1307 | const struct ieee80211_wmm_ac *wmm_ac2, | |
1308 | struct ieee80211_wmm_ac *intersect) | |
1309 | { | |
1310 | intersect->cw_min = max_t(u16, wmm_ac1->cw_min, wmm_ac2->cw_min); | |
1311 | intersect->cw_max = max_t(u16, wmm_ac1->cw_max, wmm_ac2->cw_max); | |
1312 | intersect->cot = min_t(u16, wmm_ac1->cot, wmm_ac2->cot); | |
1313 | intersect->aifsn = max_t(u8, wmm_ac1->aifsn, wmm_ac2->aifsn); | |
1314 | } | |
1315 | ||
fb1fc7ad LR |
1316 | /* |
1317 | * Helper for regdom_intersect(), this does the real | |
1318 | * mathematical intersection fun | |
1319 | */ | |
97524820 JD |
1320 | static int reg_rules_intersect(const struct ieee80211_regdomain *rd1, |
1321 | const struct ieee80211_regdomain *rd2, | |
1322 | const struct ieee80211_reg_rule *rule1, | |
1a919318 JB |
1323 | const struct ieee80211_reg_rule *rule2, |
1324 | struct ieee80211_reg_rule *intersected_rule) | |
9c96477d LR |
1325 | { |
1326 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
1327 | struct ieee80211_freq_range *freq_range; | |
1328 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
1329 | struct ieee80211_power_rule *power_rule; | |
08a75a88 IP |
1330 | const struct ieee80211_wmm_rule *wmm_rule1, *wmm_rule2; |
1331 | struct ieee80211_wmm_rule *wmm_rule; | |
97524820 | 1332 | u32 freq_diff, max_bandwidth1, max_bandwidth2; |
9c96477d LR |
1333 | |
1334 | freq_range1 = &rule1->freq_range; | |
1335 | freq_range2 = &rule2->freq_range; | |
1336 | freq_range = &intersected_rule->freq_range; | |
1337 | ||
1338 | power_rule1 = &rule1->power_rule; | |
1339 | power_rule2 = &rule2->power_rule; | |
1340 | power_rule = &intersected_rule->power_rule; | |
1341 | ||
08a75a88 IP |
1342 | wmm_rule1 = &rule1->wmm_rule; |
1343 | wmm_rule2 = &rule2->wmm_rule; | |
1344 | wmm_rule = &intersected_rule->wmm_rule; | |
1345 | ||
9c96477d | 1346 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, |
1a919318 | 1347 | freq_range2->start_freq_khz); |
9c96477d | 1348 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
1a919318 | 1349 | freq_range2->end_freq_khz); |
97524820 JD |
1350 | |
1351 | max_bandwidth1 = freq_range1->max_bandwidth_khz; | |
1352 | max_bandwidth2 = freq_range2->max_bandwidth_khz; | |
1353 | ||
b0dfd2ea JD |
1354 | if (rule1->flags & NL80211_RRF_AUTO_BW) |
1355 | max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1); | |
1356 | if (rule2->flags & NL80211_RRF_AUTO_BW) | |
1357 | max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2); | |
97524820 JD |
1358 | |
1359 | freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2); | |
9c96477d | 1360 | |
b0dfd2ea JD |
1361 | intersected_rule->flags = rule1->flags | rule2->flags; |
1362 | ||
1363 | /* | |
1364 | * In case NL80211_RRF_AUTO_BW requested for both rules | |
1365 | * set AUTO_BW in intersected rule also. Next we will | |
1366 | * calculate BW correctly in handle_channel function. | |
1367 | * In other case remove AUTO_BW flag while we calculate | |
1368 | * maximum bandwidth correctly and auto calculation is | |
1369 | * not required. | |
1370 | */ | |
1371 | if ((rule1->flags & NL80211_RRF_AUTO_BW) && | |
1372 | (rule2->flags & NL80211_RRF_AUTO_BW)) | |
1373 | intersected_rule->flags |= NL80211_RRF_AUTO_BW; | |
1374 | else | |
1375 | intersected_rule->flags &= ~NL80211_RRF_AUTO_BW; | |
1376 | ||
9c96477d LR |
1377 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; |
1378 | if (freq_range->max_bandwidth_khz > freq_diff) | |
1379 | freq_range->max_bandwidth_khz = freq_diff; | |
1380 | ||
1381 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
1382 | power_rule2->max_eirp); | |
1383 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
1384 | power_rule2->max_antenna_gain); | |
1385 | ||
089027e5 JD |
1386 | intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms, |
1387 | rule2->dfs_cac_ms); | |
1388 | ||
08a75a88 IP |
1389 | if (rule1->has_wmm && rule2->has_wmm) { |
1390 | u8 ac; | |
1391 | ||
1392 | for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { | |
1393 | reg_wmm_rules_intersect(&wmm_rule1->client[ac], | |
1394 | &wmm_rule2->client[ac], | |
1395 | &wmm_rule->client[ac]); | |
1396 | reg_wmm_rules_intersect(&wmm_rule1->ap[ac], | |
1397 | &wmm_rule2->ap[ac], | |
1398 | &wmm_rule->ap[ac]); | |
1399 | } | |
1400 | ||
1401 | intersected_rule->has_wmm = true; | |
1402 | } else if (rule1->has_wmm) { | |
1403 | *wmm_rule = *wmm_rule1; | |
1404 | intersected_rule->has_wmm = true; | |
1405 | } else if (rule2->has_wmm) { | |
1406 | *wmm_rule = *wmm_rule2; | |
1407 | intersected_rule->has_wmm = true; | |
1408 | } else { | |
1409 | intersected_rule->has_wmm = false; | |
1410 | } | |
1411 | ||
9c96477d LR |
1412 | if (!is_valid_reg_rule(intersected_rule)) |
1413 | return -EINVAL; | |
1414 | ||
1415 | return 0; | |
1416 | } | |
1417 | ||
a62a1aed EP |
1418 | /* check whether old rule contains new rule */ |
1419 | static bool rule_contains(struct ieee80211_reg_rule *r1, | |
1420 | struct ieee80211_reg_rule *r2) | |
1421 | { | |
1422 | /* for simplicity, currently consider only same flags */ | |
1423 | if (r1->flags != r2->flags) | |
1424 | return false; | |
1425 | ||
1426 | /* verify r1 is more restrictive */ | |
1427 | if ((r1->power_rule.max_antenna_gain > | |
1428 | r2->power_rule.max_antenna_gain) || | |
1429 | r1->power_rule.max_eirp > r2->power_rule.max_eirp) | |
1430 | return false; | |
1431 | ||
1432 | /* make sure r2's range is contained within r1 */ | |
1433 | if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz || | |
1434 | r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz) | |
1435 | return false; | |
1436 | ||
1437 | /* and finally verify that r1.max_bw >= r2.max_bw */ | |
1438 | if (r1->freq_range.max_bandwidth_khz < | |
1439 | r2->freq_range.max_bandwidth_khz) | |
1440 | return false; | |
1441 | ||
1442 | return true; | |
1443 | } | |
1444 | ||
1445 | /* add or extend current rules. do nothing if rule is already contained */ | |
1446 | static void add_rule(struct ieee80211_reg_rule *rule, | |
1447 | struct ieee80211_reg_rule *reg_rules, u32 *n_rules) | |
1448 | { | |
1449 | struct ieee80211_reg_rule *tmp_rule; | |
1450 | int i; | |
1451 | ||
1452 | for (i = 0; i < *n_rules; i++) { | |
1453 | tmp_rule = ®_rules[i]; | |
1454 | /* rule is already contained - do nothing */ | |
1455 | if (rule_contains(tmp_rule, rule)) | |
1456 | return; | |
1457 | ||
1458 | /* extend rule if possible */ | |
1459 | if (rule_contains(rule, tmp_rule)) { | |
1460 | memcpy(tmp_rule, rule, sizeof(*rule)); | |
1461 | return; | |
1462 | } | |
1463 | } | |
1464 | ||
1465 | memcpy(®_rules[*n_rules], rule, sizeof(*rule)); | |
1466 | (*n_rules)++; | |
1467 | } | |
1468 | ||
9c96477d LR |
1469 | /** |
1470 | * regdom_intersect - do the intersection between two regulatory domains | |
1471 | * @rd1: first regulatory domain | |
1472 | * @rd2: second regulatory domain | |
1473 | * | |
1474 | * Use this function to get the intersection between two regulatory domains. | |
1475 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
1476 | * as no one single alpha2 can represent this regulatory domain. | |
1477 | * | |
1478 | * Returns a pointer to the regulatory domain structure which will hold the | |
1479 | * resulting intersection of rules between rd1 and rd2. We will | |
1480 | * kzalloc() this structure for you. | |
1481 | */ | |
1a919318 JB |
1482 | static struct ieee80211_regdomain * |
1483 | regdom_intersect(const struct ieee80211_regdomain *rd1, | |
1484 | const struct ieee80211_regdomain *rd2) | |
9c96477d | 1485 | { |
9f8c7136 | 1486 | int r; |
9c96477d | 1487 | unsigned int x, y; |
a62a1aed | 1488 | unsigned int num_rules = 0; |
9c96477d | 1489 | const struct ieee80211_reg_rule *rule1, *rule2; |
a62a1aed | 1490 | struct ieee80211_reg_rule intersected_rule; |
9c96477d | 1491 | struct ieee80211_regdomain *rd; |
9c96477d LR |
1492 | |
1493 | if (!rd1 || !rd2) | |
1494 | return NULL; | |
1495 | ||
fb1fc7ad LR |
1496 | /* |
1497 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
1498 | * build them. This is to so we can malloc() and free() a |
1499 | * regdomain once. The reason we use reg_rules_intersect() here | |
1500 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
1501 | * All rules that do check out OK are valid. |
1502 | */ | |
9c96477d LR |
1503 | |
1504 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
1505 | rule1 = &rd1->reg_rules[x]; | |
1506 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
1507 | rule2 = &rd2->reg_rules[y]; | |
97524820 | 1508 | if (!reg_rules_intersect(rd1, rd2, rule1, rule2, |
a62a1aed | 1509 | &intersected_rule)) |
9c96477d | 1510 | num_rules++; |
9c96477d LR |
1511 | } |
1512 | } | |
1513 | ||
1514 | if (!num_rules) | |
1515 | return NULL; | |
1516 | ||
9f8c7136 | 1517 | rd = kzalloc(struct_size(rd, reg_rules, num_rules), GFP_KERNEL); |
9c96477d LR |
1518 | if (!rd) |
1519 | return NULL; | |
1520 | ||
a62a1aed | 1521 | for (x = 0; x < rd1->n_reg_rules; x++) { |
9c96477d | 1522 | rule1 = &rd1->reg_rules[x]; |
a62a1aed | 1523 | for (y = 0; y < rd2->n_reg_rules; y++) { |
9c96477d | 1524 | rule2 = &rd2->reg_rules[y]; |
97524820 | 1525 | r = reg_rules_intersect(rd1, rd2, rule1, rule2, |
a62a1aed | 1526 | &intersected_rule); |
fb1fc7ad LR |
1527 | /* |
1528 | * No need to memset here the intersected rule here as | |
1529 | * we're not using the stack anymore | |
1530 | */ | |
9c96477d LR |
1531 | if (r) |
1532 | continue; | |
9c96477d | 1533 | |
a62a1aed EP |
1534 | add_rule(&intersected_rule, rd->reg_rules, |
1535 | &rd->n_reg_rules); | |
1536 | } | |
9c96477d LR |
1537 | } |
1538 | ||
9c96477d LR |
1539 | rd->alpha2[0] = '9'; |
1540 | rd->alpha2[1] = '8'; | |
adbfb058 LR |
1541 | rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region, |
1542 | rd2->dfs_region); | |
9c96477d LR |
1543 | |
1544 | return rd; | |
1545 | } | |
1546 | ||
fb1fc7ad LR |
1547 | /* |
1548 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
1549 | * want to just have the channel structure use these | |
1550 | */ | |
b2e1b302 LR |
1551 | static u32 map_regdom_flags(u32 rd_flags) |
1552 | { | |
1553 | u32 channel_flags = 0; | |
8fe02e16 LR |
1554 | if (rd_flags & NL80211_RRF_NO_IR_ALL) |
1555 | channel_flags |= IEEE80211_CHAN_NO_IR; | |
b2e1b302 LR |
1556 | if (rd_flags & NL80211_RRF_DFS) |
1557 | channel_flags |= IEEE80211_CHAN_RADAR; | |
03f6b084 SF |
1558 | if (rd_flags & NL80211_RRF_NO_OFDM) |
1559 | channel_flags |= IEEE80211_CHAN_NO_OFDM; | |
570dbde1 DS |
1560 | if (rd_flags & NL80211_RRF_NO_OUTDOOR) |
1561 | channel_flags |= IEEE80211_CHAN_INDOOR_ONLY; | |
06f207fc AN |
1562 | if (rd_flags & NL80211_RRF_IR_CONCURRENT) |
1563 | channel_flags |= IEEE80211_CHAN_IR_CONCURRENT; | |
a6d4a534 AN |
1564 | if (rd_flags & NL80211_RRF_NO_HT40MINUS) |
1565 | channel_flags |= IEEE80211_CHAN_NO_HT40MINUS; | |
1566 | if (rd_flags & NL80211_RRF_NO_HT40PLUS) | |
1567 | channel_flags |= IEEE80211_CHAN_NO_HT40PLUS; | |
1568 | if (rd_flags & NL80211_RRF_NO_80MHZ) | |
1569 | channel_flags |= IEEE80211_CHAN_NO_80MHZ; | |
1570 | if (rd_flags & NL80211_RRF_NO_160MHZ) | |
1571 | channel_flags |= IEEE80211_CHAN_NO_160MHZ; | |
b2e1b302 LR |
1572 | return channel_flags; |
1573 | } | |
1574 | ||
361c9c8b | 1575 | static const struct ieee80211_reg_rule * |
49172874 | 1576 | freq_reg_info_regd(u32 center_freq, |
4edd5698 | 1577 | const struct ieee80211_regdomain *regd, u32 bw) |
8318d78a JB |
1578 | { |
1579 | int i; | |
0c7dc45d | 1580 | bool band_rule_found = false; |
038659e7 LR |
1581 | bool bw_fits = false; |
1582 | ||
3e0c3ff3 | 1583 | if (!regd) |
361c9c8b | 1584 | return ERR_PTR(-EINVAL); |
b2e1b302 | 1585 | |
3e0c3ff3 | 1586 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
1587 | const struct ieee80211_reg_rule *rr; |
1588 | const struct ieee80211_freq_range *fr = NULL; | |
b2e1b302 | 1589 | |
3e0c3ff3 | 1590 | rr = ®d->reg_rules[i]; |
b2e1b302 | 1591 | fr = &rr->freq_range; |
0c7dc45d | 1592 | |
fb1fc7ad LR |
1593 | /* |
1594 | * We only need to know if one frequency rule was | |
0c7dc45d | 1595 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
1596 | * not overwrite it once found |
1597 | */ | |
0c7dc45d LR |
1598 | if (!band_rule_found) |
1599 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
1600 | ||
4787cfa0 | 1601 | bw_fits = cfg80211_does_bw_fit_range(fr, center_freq, bw); |
0c7dc45d | 1602 | |
361c9c8b JB |
1603 | if (band_rule_found && bw_fits) |
1604 | return rr; | |
8318d78a JB |
1605 | } |
1606 | ||
0c7dc45d | 1607 | if (!band_rule_found) |
361c9c8b | 1608 | return ERR_PTR(-ERANGE); |
0c7dc45d | 1609 | |
361c9c8b | 1610 | return ERR_PTR(-EINVAL); |
b2e1b302 LR |
1611 | } |
1612 | ||
8de1c63b JB |
1613 | static const struct ieee80211_reg_rule * |
1614 | __freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw) | |
1fa25e41 | 1615 | { |
4edd5698 MM |
1616 | const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy); |
1617 | const struct ieee80211_reg_rule *reg_rule = NULL; | |
1618 | u32 bw; | |
1a919318 | 1619 | |
4edd5698 | 1620 | for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) { |
49172874 | 1621 | reg_rule = freq_reg_info_regd(center_freq, regd, bw); |
4edd5698 MM |
1622 | if (!IS_ERR(reg_rule)) |
1623 | return reg_rule; | |
1624 | } | |
5d885b99 | 1625 | |
4edd5698 MM |
1626 | return reg_rule; |
1627 | } | |
1628 | ||
1629 | const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, | |
1630 | u32 center_freq) | |
1631 | { | |
1632 | return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(20)); | |
1fa25e41 | 1633 | } |
4f366c5d | 1634 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 1635 | |
034c6d6e | 1636 | const char *reg_initiator_name(enum nl80211_reg_initiator initiator) |
926a0a09 LR |
1637 | { |
1638 | switch (initiator) { | |
1639 | case NL80211_REGDOM_SET_BY_CORE: | |
034c6d6e | 1640 | return "core"; |
926a0a09 | 1641 | case NL80211_REGDOM_SET_BY_USER: |
034c6d6e | 1642 | return "user"; |
926a0a09 | 1643 | case NL80211_REGDOM_SET_BY_DRIVER: |
034c6d6e | 1644 | return "driver"; |
926a0a09 | 1645 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
8db0c433 | 1646 | return "country element"; |
926a0a09 LR |
1647 | default: |
1648 | WARN_ON(1); | |
034c6d6e | 1649 | return "bug"; |
926a0a09 LR |
1650 | } |
1651 | } | |
034c6d6e | 1652 | EXPORT_SYMBOL(reg_initiator_name); |
e702d3cf | 1653 | |
1aeb135f MS |
1654 | static uint32_t reg_rule_to_chan_bw_flags(const struct ieee80211_regdomain *regd, |
1655 | const struct ieee80211_reg_rule *reg_rule, | |
1656 | const struct ieee80211_channel *chan) | |
1657 | { | |
1658 | const struct ieee80211_freq_range *freq_range = NULL; | |
1659 | u32 max_bandwidth_khz, bw_flags = 0; | |
1660 | ||
1661 | freq_range = ®_rule->freq_range; | |
1662 | ||
1663 | max_bandwidth_khz = freq_range->max_bandwidth_khz; | |
1664 | /* Check if auto calculation requested */ | |
1665 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) | |
1666 | max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); | |
1667 | ||
1668 | /* If we get a reg_rule we can assume that at least 5Mhz fit */ | |
4787cfa0 RM |
1669 | if (!cfg80211_does_bw_fit_range(freq_range, |
1670 | MHZ_TO_KHZ(chan->center_freq), | |
1671 | MHZ_TO_KHZ(10))) | |
1aeb135f | 1672 | bw_flags |= IEEE80211_CHAN_NO_10MHZ; |
4787cfa0 RM |
1673 | if (!cfg80211_does_bw_fit_range(freq_range, |
1674 | MHZ_TO_KHZ(chan->center_freq), | |
1675 | MHZ_TO_KHZ(20))) | |
1aeb135f MS |
1676 | bw_flags |= IEEE80211_CHAN_NO_20MHZ; |
1677 | ||
1678 | if (max_bandwidth_khz < MHZ_TO_KHZ(10)) | |
1679 | bw_flags |= IEEE80211_CHAN_NO_10MHZ; | |
1680 | if (max_bandwidth_khz < MHZ_TO_KHZ(20)) | |
1681 | bw_flags |= IEEE80211_CHAN_NO_20MHZ; | |
1682 | if (max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
1683 | bw_flags |= IEEE80211_CHAN_NO_HT40; | |
1684 | if (max_bandwidth_khz < MHZ_TO_KHZ(80)) | |
1685 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; | |
1686 | if (max_bandwidth_khz < MHZ_TO_KHZ(160)) | |
1687 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; | |
1688 | return bw_flags; | |
1689 | } | |
1690 | ||
e33e2241 JB |
1691 | /* |
1692 | * Note that right now we assume the desired channel bandwidth | |
1693 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
1694 | * per channel, the primary and the extension channel). | |
038659e7 | 1695 | */ |
7ca43d03 LR |
1696 | static void handle_channel(struct wiphy *wiphy, |
1697 | enum nl80211_reg_initiator initiator, | |
fdc9d7b2 | 1698 | struct ieee80211_channel *chan) |
b2e1b302 | 1699 | { |
038659e7 | 1700 | u32 flags, bw_flags = 0; |
b2e1b302 LR |
1701 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1702 | const struct ieee80211_power_rule *power_rule = NULL; | |
fe33eb39 | 1703 | struct wiphy *request_wiphy = NULL; |
c492db37 | 1704 | struct regulatory_request *lr = get_last_request(); |
97524820 | 1705 | const struct ieee80211_regdomain *regd; |
a92a3ce7 | 1706 | |
c492db37 | 1707 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
a92a3ce7 LR |
1708 | |
1709 | flags = chan->orig_flags; | |
b2e1b302 | 1710 | |
361c9c8b JB |
1711 | reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); |
1712 | if (IS_ERR(reg_rule)) { | |
ca4ffe8f LR |
1713 | /* |
1714 | * We will disable all channels that do not match our | |
25985edc | 1715 | * received regulatory rule unless the hint is coming |
ca4ffe8f LR |
1716 | * from a Country IE and the Country IE had no information |
1717 | * about a band. The IEEE 802.11 spec allows for an AP | |
1718 | * to send only a subset of the regulatory rules allowed, | |
1719 | * so an AP in the US that only supports 2.4 GHz may only send | |
1720 | * a country IE with information for the 2.4 GHz band | |
1721 | * while 5 GHz is still supported. | |
1722 | */ | |
1723 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
361c9c8b | 1724 | PTR_ERR(reg_rule) == -ERANGE) |
ca4ffe8f LR |
1725 | return; |
1726 | ||
cc493e4f LR |
1727 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
1728 | request_wiphy && request_wiphy == wiphy && | |
a2f73b6c | 1729 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
c799ba6e JB |
1730 | pr_debug("Disabling freq %d MHz for good\n", |
1731 | chan->center_freq); | |
cc493e4f LR |
1732 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; |
1733 | chan->flags = chan->orig_flags; | |
1734 | } else { | |
c799ba6e JB |
1735 | pr_debug("Disabling freq %d MHz\n", |
1736 | chan->center_freq); | |
cc493e4f LR |
1737 | chan->flags |= IEEE80211_CHAN_DISABLED; |
1738 | } | |
8318d78a | 1739 | return; |
ca4ffe8f | 1740 | } |
8318d78a | 1741 | |
b0dfd2ea | 1742 | regd = reg_get_regdomain(wiphy); |
e702d3cf | 1743 | |
b2e1b302 | 1744 | power_rule = ®_rule->power_rule; |
1aeb135f | 1745 | bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan); |
b2e1b302 | 1746 | |
c492db37 | 1747 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 1748 | request_wiphy && request_wiphy == wiphy && |
a2f73b6c | 1749 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
fb1fc7ad | 1750 | /* |
25985edc | 1751 | * This guarantees the driver's requested regulatory domain |
f976376d | 1752 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
1753 | * settings |
1754 | */ | |
f976376d | 1755 | chan->flags = chan->orig_flags = |
038659e7 | 1756 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
1757 | chan->max_antenna_gain = chan->orig_mag = |
1758 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
279f0f55 | 1759 | chan->max_reg_power = chan->max_power = chan->orig_mpwr = |
f976376d | 1760 | (int) MBM_TO_DBM(power_rule->max_eirp); |
4f267c11 JD |
1761 | |
1762 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1763 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1764 | if (reg_rule->dfs_cac_ms) | |
1765 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1766 | } | |
1767 | ||
f976376d LR |
1768 | return; |
1769 | } | |
1770 | ||
04f39047 SW |
1771 | chan->dfs_state = NL80211_DFS_USABLE; |
1772 | chan->dfs_state_entered = jiffies; | |
1773 | ||
aa3d7eef | 1774 | chan->beacon_found = false; |
038659e7 | 1775 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
1a919318 JB |
1776 | chan->max_antenna_gain = |
1777 | min_t(int, chan->orig_mag, | |
1778 | MBI_TO_DBI(power_rule->max_antenna_gain)); | |
eccc068e | 1779 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
089027e5 JD |
1780 | |
1781 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1782 | if (reg_rule->dfs_cac_ms) | |
1783 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1784 | else | |
1785 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1786 | } | |
1787 | ||
5e31fc08 SG |
1788 | if (chan->orig_mpwr) { |
1789 | /* | |
a09a85a0 LR |
1790 | * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER |
1791 | * will always follow the passed country IE power settings. | |
5e31fc08 SG |
1792 | */ |
1793 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a09a85a0 | 1794 | wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER) |
5e31fc08 SG |
1795 | chan->max_power = chan->max_reg_power; |
1796 | else | |
1797 | chan->max_power = min(chan->orig_mpwr, | |
1798 | chan->max_reg_power); | |
1799 | } else | |
1800 | chan->max_power = chan->max_reg_power; | |
8318d78a JB |
1801 | } |
1802 | ||
7ca43d03 | 1803 | static void handle_band(struct wiphy *wiphy, |
fdc9d7b2 JB |
1804 | enum nl80211_reg_initiator initiator, |
1805 | struct ieee80211_supported_band *sband) | |
8318d78a | 1806 | { |
a92a3ce7 | 1807 | unsigned int i; |
a92a3ce7 | 1808 | |
fdc9d7b2 JB |
1809 | if (!sband) |
1810 | return; | |
8318d78a JB |
1811 | |
1812 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1813 | handle_channel(wiphy, initiator, &sband->channels[i]); |
8318d78a JB |
1814 | } |
1815 | ||
57b5ce07 LR |
1816 | static bool reg_request_cell_base(struct regulatory_request *request) |
1817 | { | |
1818 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1819 | return false; | |
1a919318 | 1820 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; |
57b5ce07 LR |
1821 | } |
1822 | ||
1823 | bool reg_last_request_cell_base(void) | |
1824 | { | |
38fd2143 | 1825 | return reg_request_cell_base(get_last_request()); |
57b5ce07 LR |
1826 | } |
1827 | ||
94fc661f | 1828 | #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS |
57b5ce07 | 1829 | /* Core specific check */ |
2f92212b JB |
1830 | static enum reg_request_treatment |
1831 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 | 1832 | { |
c492db37 JB |
1833 | struct regulatory_request *lr = get_last_request(); |
1834 | ||
57b5ce07 | 1835 | if (!reg_num_devs_support_basehint) |
2f92212b | 1836 | return REG_REQ_IGNORE; |
57b5ce07 | 1837 | |
c492db37 | 1838 | if (reg_request_cell_base(lr) && |
1a919318 | 1839 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 1840 | return REG_REQ_ALREADY_SET; |
1a919318 | 1841 | |
2f92212b | 1842 | return REG_REQ_OK; |
57b5ce07 LR |
1843 | } |
1844 | ||
1845 | /* Device specific check */ | |
1846 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
1847 | { | |
1a919318 | 1848 | return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); |
57b5ce07 LR |
1849 | } |
1850 | #else | |
a515de66 JB |
1851 | static enum reg_request_treatment |
1852 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 | 1853 | { |
2f92212b | 1854 | return REG_REQ_IGNORE; |
57b5ce07 | 1855 | } |
1a919318 JB |
1856 | |
1857 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
57b5ce07 LR |
1858 | { |
1859 | return true; | |
1860 | } | |
1861 | #endif | |
1862 | ||
fa1fb9cb LR |
1863 | static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy) |
1864 | { | |
a2f73b6c LR |
1865 | if (wiphy->regulatory_flags & REGULATORY_STRICT_REG && |
1866 | !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)) | |
fa1fb9cb LR |
1867 | return true; |
1868 | return false; | |
1869 | } | |
57b5ce07 | 1870 | |
7db90f4a LR |
1871 | static bool ignore_reg_update(struct wiphy *wiphy, |
1872 | enum nl80211_reg_initiator initiator) | |
14b9815a | 1873 | { |
c492db37 JB |
1874 | struct regulatory_request *lr = get_last_request(); |
1875 | ||
b0d7aa59 JD |
1876 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) |
1877 | return true; | |
1878 | ||
c492db37 | 1879 | if (!lr) { |
c799ba6e JB |
1880 | pr_debug("Ignoring regulatory request set by %s since last_request is not set\n", |
1881 | reg_initiator_name(initiator)); | |
14b9815a | 1882 | return true; |
926a0a09 LR |
1883 | } |
1884 | ||
7db90f4a | 1885 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
a2f73b6c | 1886 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { |
c799ba6e JB |
1887 | pr_debug("Ignoring regulatory request set by %s since the driver uses its own custom regulatory domain\n", |
1888 | reg_initiator_name(initiator)); | |
14b9815a | 1889 | return true; |
926a0a09 LR |
1890 | } |
1891 | ||
fb1fc7ad LR |
1892 | /* |
1893 | * wiphy->regd will be set once the device has its own | |
1894 | * desired regulatory domain set | |
1895 | */ | |
fa1fb9cb | 1896 | if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd && |
749b527b | 1897 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
c492db37 | 1898 | !is_world_regdom(lr->alpha2)) { |
c799ba6e JB |
1899 | pr_debug("Ignoring regulatory request set by %s since the driver requires its own regulatory domain to be set first\n", |
1900 | reg_initiator_name(initiator)); | |
14b9815a | 1901 | return true; |
926a0a09 LR |
1902 | } |
1903 | ||
c492db37 | 1904 | if (reg_request_cell_base(lr)) |
57b5ce07 LR |
1905 | return reg_dev_ignore_cell_hint(wiphy); |
1906 | ||
14b9815a LR |
1907 | return false; |
1908 | } | |
1909 | ||
3195e489 LR |
1910 | static bool reg_is_world_roaming(struct wiphy *wiphy) |
1911 | { | |
1912 | const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); | |
1913 | const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); | |
1914 | struct regulatory_request *lr = get_last_request(); | |
1915 | ||
1916 | if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) | |
1917 | return true; | |
1918 | ||
1919 | if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a2f73b6c | 1920 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
3195e489 LR |
1921 | return true; |
1922 | ||
1923 | return false; | |
1924 | } | |
1925 | ||
1a919318 | 1926 | static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, |
e38f8a7a LR |
1927 | struct reg_beacon *reg_beacon) |
1928 | { | |
e38f8a7a LR |
1929 | struct ieee80211_supported_band *sband; |
1930 | struct ieee80211_channel *chan; | |
6bad8766 LR |
1931 | bool channel_changed = false; |
1932 | struct ieee80211_channel chan_before; | |
e38f8a7a | 1933 | |
e38f8a7a LR |
1934 | sband = wiphy->bands[reg_beacon->chan.band]; |
1935 | chan = &sband->channels[chan_idx]; | |
1936 | ||
1937 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1938 | return; | |
1939 | ||
6bad8766 LR |
1940 | if (chan->beacon_found) |
1941 | return; | |
1942 | ||
1943 | chan->beacon_found = true; | |
1944 | ||
0f500a5f LR |
1945 | if (!reg_is_world_roaming(wiphy)) |
1946 | return; | |
1947 | ||
a2f73b6c | 1948 | if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS) |
37184244 LR |
1949 | return; |
1950 | ||
a48a52b7 | 1951 | chan_before = *chan; |
6bad8766 | 1952 | |
8fe02e16 LR |
1953 | if (chan->flags & IEEE80211_CHAN_NO_IR) { |
1954 | chan->flags &= ~IEEE80211_CHAN_NO_IR; | |
6bad8766 | 1955 | channel_changed = true; |
e38f8a7a LR |
1956 | } |
1957 | ||
6bad8766 LR |
1958 | if (channel_changed) |
1959 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1960 | } |
1961 | ||
1962 | /* | |
1963 | * Called when a scan on a wiphy finds a beacon on | |
1964 | * new channel | |
1965 | */ | |
1966 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1967 | struct reg_beacon *reg_beacon) | |
1968 | { | |
1969 | unsigned int i; | |
1970 | struct ieee80211_supported_band *sband; | |
1971 | ||
e38f8a7a LR |
1972 | if (!wiphy->bands[reg_beacon->chan.band]) |
1973 | return; | |
1974 | ||
1975 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1976 | ||
1977 | for (i = 0; i < sband->n_channels; i++) | |
1978 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1979 | } | |
1980 | ||
1981 | /* | |
1982 | * Called upon reg changes or a new wiphy is added | |
1983 | */ | |
1984 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1985 | { | |
1986 | unsigned int i; | |
1987 | struct ieee80211_supported_band *sband; | |
1988 | struct reg_beacon *reg_beacon; | |
1989 | ||
e38f8a7a LR |
1990 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
1991 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1992 | continue; | |
1993 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1994 | for (i = 0; i < sband->n_channels; i++) | |
1995 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1996 | } | |
1997 | } | |
1998 | ||
e38f8a7a LR |
1999 | /* Reap the advantages of previously found beacons */ |
2000 | static void reg_process_beacons(struct wiphy *wiphy) | |
2001 | { | |
b1ed8ddd LR |
2002 | /* |
2003 | * Means we are just firing up cfg80211, so no beacons would | |
2004 | * have been processed yet. | |
2005 | */ | |
2006 | if (!last_request) | |
2007 | return; | |
e38f8a7a LR |
2008 | wiphy_update_beacon_reg(wiphy); |
2009 | } | |
2010 | ||
1a919318 | 2011 | static bool is_ht40_allowed(struct ieee80211_channel *chan) |
038659e7 LR |
2012 | { |
2013 | if (!chan) | |
1a919318 | 2014 | return false; |
038659e7 | 2015 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
1a919318 | 2016 | return false; |
038659e7 | 2017 | /* This would happen when regulatory rules disallow HT40 completely */ |
55b183ad FF |
2018 | if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) |
2019 | return false; | |
2020 | return true; | |
038659e7 LR |
2021 | } |
2022 | ||
2023 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
fdc9d7b2 | 2024 | struct ieee80211_channel *channel) |
038659e7 | 2025 | { |
fdc9d7b2 | 2026 | struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; |
038659e7 | 2027 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
4e0854a7 | 2028 | const struct ieee80211_regdomain *regd; |
038659e7 | 2029 | unsigned int i; |
4e0854a7 | 2030 | u32 flags; |
038659e7 | 2031 | |
1a919318 | 2032 | if (!is_ht40_allowed(channel)) { |
038659e7 LR |
2033 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
2034 | return; | |
2035 | } | |
2036 | ||
2037 | /* | |
2038 | * We need to ensure the extension channels exist to | |
2039 | * be able to use HT40- or HT40+, this finds them (or not) | |
2040 | */ | |
2041 | for (i = 0; i < sband->n_channels; i++) { | |
2042 | struct ieee80211_channel *c = &sband->channels[i]; | |
1a919318 | 2043 | |
038659e7 LR |
2044 | if (c->center_freq == (channel->center_freq - 20)) |
2045 | channel_before = c; | |
2046 | if (c->center_freq == (channel->center_freq + 20)) | |
2047 | channel_after = c; | |
2048 | } | |
2049 | ||
4e0854a7 EG |
2050 | flags = 0; |
2051 | regd = get_wiphy_regdom(wiphy); | |
2052 | if (regd) { | |
2053 | const struct ieee80211_reg_rule *reg_rule = | |
2054 | freq_reg_info_regd(MHZ_TO_KHZ(channel->center_freq), | |
2055 | regd, MHZ_TO_KHZ(20)); | |
2056 | ||
2057 | if (!IS_ERR(reg_rule)) | |
2058 | flags = reg_rule->flags; | |
2059 | } | |
2060 | ||
038659e7 LR |
2061 | /* |
2062 | * Please note that this assumes target bandwidth is 20 MHz, | |
2063 | * if that ever changes we also need to change the below logic | |
2064 | * to include that as well. | |
2065 | */ | |
4e0854a7 EG |
2066 | if (!is_ht40_allowed(channel_before) || |
2067 | flags & NL80211_RRF_NO_HT40MINUS) | |
689da1b3 | 2068 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 2069 | else |
689da1b3 | 2070 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 2071 | |
4e0854a7 EG |
2072 | if (!is_ht40_allowed(channel_after) || |
2073 | flags & NL80211_RRF_NO_HT40PLUS) | |
689da1b3 | 2074 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 2075 | else |
689da1b3 | 2076 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
2077 | } |
2078 | ||
2079 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
fdc9d7b2 | 2080 | struct ieee80211_supported_band *sband) |
038659e7 LR |
2081 | { |
2082 | unsigned int i; | |
038659e7 | 2083 | |
fdc9d7b2 JB |
2084 | if (!sband) |
2085 | return; | |
038659e7 LR |
2086 | |
2087 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 2088 | reg_process_ht_flags_channel(wiphy, &sband->channels[i]); |
038659e7 LR |
2089 | } |
2090 | ||
2091 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
2092 | { | |
57fbcce3 | 2093 | enum nl80211_band band; |
038659e7 LR |
2094 | |
2095 | if (!wiphy) | |
2096 | return; | |
2097 | ||
57fbcce3 | 2098 | for (band = 0; band < NUM_NL80211_BANDS; band++) |
fdc9d7b2 | 2099 | reg_process_ht_flags_band(wiphy, wiphy->bands[band]); |
038659e7 LR |
2100 | } |
2101 | ||
0e3802db LR |
2102 | static void reg_call_notifier(struct wiphy *wiphy, |
2103 | struct regulatory_request *request) | |
2104 | { | |
2105 | if (wiphy->reg_notifier) | |
2106 | wiphy->reg_notifier(wiphy, request); | |
2107 | } | |
2108 | ||
ad932f04 AN |
2109 | static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev) |
2110 | { | |
f43e5210 | 2111 | struct cfg80211_chan_def chandef = {}; |
ad932f04 | 2112 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
20658702 | 2113 | enum nl80211_iftype iftype; |
ad932f04 AN |
2114 | |
2115 | wdev_lock(wdev); | |
20658702 | 2116 | iftype = wdev->iftype; |
ad932f04 | 2117 | |
20658702 | 2118 | /* make sure the interface is active */ |
ad932f04 | 2119 | if (!wdev->netdev || !netif_running(wdev->netdev)) |
20658702 | 2120 | goto wdev_inactive_unlock; |
ad932f04 | 2121 | |
20658702 | 2122 | switch (iftype) { |
ad932f04 AN |
2123 | case NL80211_IFTYPE_AP: |
2124 | case NL80211_IFTYPE_P2P_GO: | |
2125 | if (!wdev->beacon_interval) | |
20658702 AN |
2126 | goto wdev_inactive_unlock; |
2127 | chandef = wdev->chandef; | |
185076d6 AN |
2128 | break; |
2129 | case NL80211_IFTYPE_ADHOC: | |
2130 | if (!wdev->ssid_len) | |
20658702 AN |
2131 | goto wdev_inactive_unlock; |
2132 | chandef = wdev->chandef; | |
ad932f04 AN |
2133 | break; |
2134 | case NL80211_IFTYPE_STATION: | |
2135 | case NL80211_IFTYPE_P2P_CLIENT: | |
ad932f04 AN |
2136 | if (!wdev->current_bss || |
2137 | !wdev->current_bss->pub.channel) | |
20658702 | 2138 | goto wdev_inactive_unlock; |
ad932f04 | 2139 | |
20658702 AN |
2140 | if (!rdev->ops->get_channel || |
2141 | rdev_get_channel(rdev, wdev, &chandef)) | |
2142 | cfg80211_chandef_create(&chandef, | |
2143 | wdev->current_bss->pub.channel, | |
2144 | NL80211_CHAN_NO_HT); | |
ad932f04 AN |
2145 | break; |
2146 | case NL80211_IFTYPE_MONITOR: | |
2147 | case NL80211_IFTYPE_AP_VLAN: | |
2148 | case NL80211_IFTYPE_P2P_DEVICE: | |
2149 | /* no enforcement required */ | |
2150 | break; | |
2151 | default: | |
2152 | /* others not implemented for now */ | |
2153 | WARN_ON(1); | |
2154 | break; | |
2155 | } | |
2156 | ||
ad932f04 | 2157 | wdev_unlock(wdev); |
20658702 AN |
2158 | |
2159 | switch (iftype) { | |
2160 | case NL80211_IFTYPE_AP: | |
2161 | case NL80211_IFTYPE_P2P_GO: | |
2162 | case NL80211_IFTYPE_ADHOC: | |
923b352f | 2163 | return cfg80211_reg_can_beacon_relax(wiphy, &chandef, iftype); |
20658702 AN |
2164 | case NL80211_IFTYPE_STATION: |
2165 | case NL80211_IFTYPE_P2P_CLIENT: | |
2166 | return cfg80211_chandef_usable(wiphy, &chandef, | |
2167 | IEEE80211_CHAN_DISABLED); | |
2168 | default: | |
2169 | break; | |
2170 | } | |
2171 | ||
2172 | return true; | |
2173 | ||
2174 | wdev_inactive_unlock: | |
2175 | wdev_unlock(wdev); | |
2176 | return true; | |
ad932f04 AN |
2177 | } |
2178 | ||
2179 | static void reg_leave_invalid_chans(struct wiphy *wiphy) | |
2180 | { | |
2181 | struct wireless_dev *wdev; | |
2182 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); | |
2183 | ||
2184 | ASSERT_RTNL(); | |
2185 | ||
53873f13 | 2186 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) |
ad932f04 AN |
2187 | if (!reg_wdev_chan_valid(wiphy, wdev)) |
2188 | cfg80211_leave(rdev, wdev); | |
2189 | } | |
2190 | ||
2191 | static void reg_check_chans_work(struct work_struct *work) | |
2192 | { | |
2193 | struct cfg80211_registered_device *rdev; | |
2194 | ||
c799ba6e | 2195 | pr_debug("Verifying active interfaces after reg change\n"); |
ad932f04 AN |
2196 | rtnl_lock(); |
2197 | ||
2198 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) | |
2199 | if (!(rdev->wiphy.regulatory_flags & | |
2200 | REGULATORY_IGNORE_STALE_KICKOFF)) | |
2201 | reg_leave_invalid_chans(&rdev->wiphy); | |
2202 | ||
2203 | rtnl_unlock(); | |
2204 | } | |
2205 | ||
2206 | static void reg_check_channels(void) | |
2207 | { | |
2208 | /* | |
2209 | * Give usermode a chance to do something nicer (move to another | |
2210 | * channel, orderly disconnection), before forcing a disconnection. | |
2211 | */ | |
2212 | mod_delayed_work(system_power_efficient_wq, | |
2213 | ®_check_chans, | |
2214 | msecs_to_jiffies(REG_ENFORCE_GRACE_MS)); | |
2215 | } | |
2216 | ||
eac03e38 SN |
2217 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
2218 | enum nl80211_reg_initiator initiator) | |
b2e1b302 | 2219 | { |
57fbcce3 | 2220 | enum nl80211_band band; |
c492db37 | 2221 | struct regulatory_request *lr = get_last_request(); |
eac03e38 | 2222 | |
0e3802db LR |
2223 | if (ignore_reg_update(wiphy, initiator)) { |
2224 | /* | |
2225 | * Regulatory updates set by CORE are ignored for custom | |
2226 | * regulatory cards. Let us notify the changes to the driver, | |
2227 | * as some drivers used this to restore its orig_* reg domain. | |
2228 | */ | |
2229 | if (initiator == NL80211_REGDOM_SET_BY_CORE && | |
e31f6456 AS |
2230 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG && |
2231 | !(wiphy->regulatory_flags & | |
2232 | REGULATORY_WIPHY_SELF_MANAGED)) | |
0e3802db | 2233 | reg_call_notifier(wiphy, lr); |
a203c2aa | 2234 | return; |
0e3802db | 2235 | } |
a203c2aa | 2236 | |
c492db37 | 2237 | lr->dfs_region = get_cfg80211_regdom()->dfs_region; |
b68e6b3b | 2238 | |
57fbcce3 | 2239 | for (band = 0; band < NUM_NL80211_BANDS; band++) |
fdc9d7b2 | 2240 | handle_band(wiphy, initiator, wiphy->bands[band]); |
a203c2aa | 2241 | |
e38f8a7a | 2242 | reg_process_beacons(wiphy); |
038659e7 | 2243 | reg_process_ht_flags(wiphy); |
0e3802db | 2244 | reg_call_notifier(wiphy, lr); |
b2e1b302 LR |
2245 | } |
2246 | ||
d7549cbb SN |
2247 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
2248 | { | |
2249 | struct cfg80211_registered_device *rdev; | |
4a38994f | 2250 | struct wiphy *wiphy; |
d7549cbb | 2251 | |
5fe231e8 | 2252 | ASSERT_RTNL(); |
458f4f9e | 2253 | |
4a38994f RM |
2254 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
2255 | wiphy = &rdev->wiphy; | |
2256 | wiphy_update_regulatory(wiphy, initiator); | |
4a38994f | 2257 | } |
ad932f04 AN |
2258 | |
2259 | reg_check_channels(); | |
d7549cbb SN |
2260 | } |
2261 | ||
1fa25e41 | 2262 | static void handle_channel_custom(struct wiphy *wiphy, |
fdc9d7b2 | 2263 | struct ieee80211_channel *chan, |
c4b9d655 GB |
2264 | const struct ieee80211_regdomain *regd, |
2265 | u32 min_bw) | |
1fa25e41 | 2266 | { |
038659e7 | 2267 | u32 bw_flags = 0; |
1fa25e41 LR |
2268 | const struct ieee80211_reg_rule *reg_rule = NULL; |
2269 | const struct ieee80211_power_rule *power_rule = NULL; | |
4edd5698 | 2270 | u32 bw; |
ac46d48e | 2271 | |
c4b9d655 | 2272 | for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) { |
49172874 | 2273 | reg_rule = freq_reg_info_regd(MHZ_TO_KHZ(chan->center_freq), |
4edd5698 MM |
2274 | regd, bw); |
2275 | if (!IS_ERR(reg_rule)) | |
2276 | break; | |
2277 | } | |
1fa25e41 | 2278 | |
a7ee7d44 | 2279 | if (IS_ERR_OR_NULL(reg_rule)) { |
c799ba6e JB |
2280 | pr_debug("Disabling freq %d MHz as custom regd has no rule that fits it\n", |
2281 | chan->center_freq); | |
db8dfee5 AN |
2282 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) { |
2283 | chan->flags |= IEEE80211_CHAN_DISABLED; | |
2284 | } else { | |
2285 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; | |
2286 | chan->flags = chan->orig_flags; | |
2287 | } | |
1fa25e41 LR |
2288 | return; |
2289 | } | |
2290 | ||
2291 | power_rule = ®_rule->power_rule; | |
1aeb135f | 2292 | bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan); |
1fa25e41 | 2293 | |
2e18b38f | 2294 | chan->dfs_state_entered = jiffies; |
c7ab5081 AN |
2295 | chan->dfs_state = NL80211_DFS_USABLE; |
2296 | ||
2297 | chan->beacon_found = false; | |
db8dfee5 AN |
2298 | |
2299 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) | |
2300 | chan->flags = chan->orig_flags | bw_flags | | |
2301 | map_regdom_flags(reg_rule->flags); | |
2302 | else | |
2303 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; | |
2304 | ||
1fa25e41 | 2305 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
279f0f55 FF |
2306 | chan->max_reg_power = chan->max_power = |
2307 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
2e18b38f AN |
2308 | |
2309 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
2310 | if (reg_rule->dfs_cac_ms) | |
2311 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
2312 | else | |
2313 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
2314 | } | |
2315 | ||
2316 | chan->max_power = chan->max_reg_power; | |
1fa25e41 LR |
2317 | } |
2318 | ||
fdc9d7b2 JB |
2319 | static void handle_band_custom(struct wiphy *wiphy, |
2320 | struct ieee80211_supported_band *sband, | |
1fa25e41 LR |
2321 | const struct ieee80211_regdomain *regd) |
2322 | { | |
2323 | unsigned int i; | |
1fa25e41 | 2324 | |
fdc9d7b2 JB |
2325 | if (!sband) |
2326 | return; | |
1fa25e41 | 2327 | |
c4b9d655 GB |
2328 | /* |
2329 | * We currently assume that you always want at least 20 MHz, | |
2330 | * otherwise channel 12 might get enabled if this rule is | |
2331 | * compatible to US, which permits 2402 - 2472 MHz. | |
2332 | */ | |
1fa25e41 | 2333 | for (i = 0; i < sband->n_channels; i++) |
c4b9d655 GB |
2334 | handle_channel_custom(wiphy, &sband->channels[i], regd, |
2335 | MHZ_TO_KHZ(20)); | |
1fa25e41 LR |
2336 | } |
2337 | ||
2338 | /* Used by drivers prior to wiphy registration */ | |
2339 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
2340 | const struct ieee80211_regdomain *regd) | |
2341 | { | |
57fbcce3 | 2342 | enum nl80211_band band; |
bbcf3f02 | 2343 | unsigned int bands_set = 0; |
ac46d48e | 2344 | |
a2f73b6c LR |
2345 | WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG), |
2346 | "wiphy should have REGULATORY_CUSTOM_REG\n"); | |
2347 | wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG; | |
222ea581 | 2348 | |
57fbcce3 | 2349 | for (band = 0; band < NUM_NL80211_BANDS; band++) { |
bbcf3f02 LR |
2350 | if (!wiphy->bands[band]) |
2351 | continue; | |
fdc9d7b2 | 2352 | handle_band_custom(wiphy, wiphy->bands[band], regd); |
bbcf3f02 | 2353 | bands_set++; |
b2e1b302 | 2354 | } |
bbcf3f02 LR |
2355 | |
2356 | /* | |
2357 | * no point in calling this if it won't have any effect | |
1a919318 | 2358 | * on your device's supported bands. |
bbcf3f02 LR |
2359 | */ |
2360 | WARN_ON(!bands_set); | |
b2e1b302 | 2361 | } |
1fa25e41 LR |
2362 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
2363 | ||
b2e253cf LR |
2364 | static void reg_set_request_processed(void) |
2365 | { | |
2366 | bool need_more_processing = false; | |
c492db37 | 2367 | struct regulatory_request *lr = get_last_request(); |
b2e253cf | 2368 | |
c492db37 | 2369 | lr->processed = true; |
b2e253cf LR |
2370 | |
2371 | spin_lock(®_requests_lock); | |
2372 | if (!list_empty(®_requests_list)) | |
2373 | need_more_processing = true; | |
2374 | spin_unlock(®_requests_lock); | |
2375 | ||
b6863036 | 2376 | cancel_crda_timeout(); |
a90c7a31 | 2377 | |
b2e253cf LR |
2378 | if (need_more_processing) |
2379 | schedule_work(®_work); | |
2380 | } | |
2381 | ||
b3eb7f3f LR |
2382 | /** |
2383 | * reg_process_hint_core - process core regulatory requests | |
2384 | * @pending_request: a pending core regulatory request | |
2385 | * | |
2386 | * The wireless subsystem can use this function to process | |
2387 | * a regulatory request issued by the regulatory core. | |
b3eb7f3f | 2388 | */ |
d34265a3 JB |
2389 | static enum reg_request_treatment |
2390 | reg_process_hint_core(struct regulatory_request *core_request) | |
b3eb7f3f | 2391 | { |
cecbb069 | 2392 | if (reg_query_database(core_request)) { |
25b20dbd JB |
2393 | core_request->intersect = false; |
2394 | core_request->processed = false; | |
2395 | reg_update_last_request(core_request); | |
d34265a3 | 2396 | return REG_REQ_OK; |
25b20dbd | 2397 | } |
d34265a3 JB |
2398 | |
2399 | return REG_REQ_IGNORE; | |
b3eb7f3f LR |
2400 | } |
2401 | ||
0d97a619 LR |
2402 | static enum reg_request_treatment |
2403 | __reg_process_hint_user(struct regulatory_request *user_request) | |
2404 | { | |
2405 | struct regulatory_request *lr = get_last_request(); | |
2406 | ||
2407 | if (reg_request_cell_base(user_request)) | |
2408 | return reg_ignore_cell_hint(user_request); | |
2409 | ||
2410 | if (reg_request_cell_base(lr)) | |
2411 | return REG_REQ_IGNORE; | |
2412 | ||
2413 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
2414 | return REG_REQ_INTERSECT; | |
2415 | /* | |
2416 | * If the user knows better the user should set the regdom | |
2417 | * to their country before the IE is picked up | |
2418 | */ | |
2419 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER && | |
2420 | lr->intersect) | |
2421 | return REG_REQ_IGNORE; | |
2422 | /* | |
2423 | * Process user requests only after previous user/driver/core | |
2424 | * requests have been processed | |
2425 | */ | |
2426 | if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || | |
2427 | lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
2428 | lr->initiator == NL80211_REGDOM_SET_BY_USER) && | |
2429 | regdom_changes(lr->alpha2)) | |
2430 | return REG_REQ_IGNORE; | |
2431 | ||
2432 | if (!regdom_changes(user_request->alpha2)) | |
2433 | return REG_REQ_ALREADY_SET; | |
2434 | ||
2435 | return REG_REQ_OK; | |
2436 | } | |
2437 | ||
2438 | /** | |
2439 | * reg_process_hint_user - process user regulatory requests | |
2440 | * @user_request: a pending user regulatory request | |
2441 | * | |
2442 | * The wireless subsystem can use this function to process | |
2443 | * a regulatory request initiated by userspace. | |
0d97a619 | 2444 | */ |
d34265a3 JB |
2445 | static enum reg_request_treatment |
2446 | reg_process_hint_user(struct regulatory_request *user_request) | |
0d97a619 LR |
2447 | { |
2448 | enum reg_request_treatment treatment; | |
0d97a619 LR |
2449 | |
2450 | treatment = __reg_process_hint_user(user_request); | |
2451 | if (treatment == REG_REQ_IGNORE || | |
d34265a3 JB |
2452 | treatment == REG_REQ_ALREADY_SET) |
2453 | return REG_REQ_IGNORE; | |
0d97a619 | 2454 | |
0d97a619 LR |
2455 | user_request->intersect = treatment == REG_REQ_INTERSECT; |
2456 | user_request->processed = false; | |
5ad6ef5e | 2457 | |
cecbb069 | 2458 | if (reg_query_database(user_request)) { |
25b20dbd JB |
2459 | reg_update_last_request(user_request); |
2460 | user_alpha2[0] = user_request->alpha2[0]; | |
2461 | user_alpha2[1] = user_request->alpha2[1]; | |
d34265a3 | 2462 | return REG_REQ_OK; |
25b20dbd | 2463 | } |
d34265a3 JB |
2464 | |
2465 | return REG_REQ_IGNORE; | |
0d97a619 LR |
2466 | } |
2467 | ||
21636c7f LR |
2468 | static enum reg_request_treatment |
2469 | __reg_process_hint_driver(struct regulatory_request *driver_request) | |
2470 | { | |
2471 | struct regulatory_request *lr = get_last_request(); | |
2472 | ||
2473 | if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { | |
2474 | if (regdom_changes(driver_request->alpha2)) | |
2475 | return REG_REQ_OK; | |
2476 | return REG_REQ_ALREADY_SET; | |
2477 | } | |
2478 | ||
2479 | /* | |
2480 | * This would happen if you unplug and plug your card | |
2481 | * back in or if you add a new device for which the previously | |
2482 | * loaded card also agrees on the regulatory domain. | |
2483 | */ | |
2484 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && | |
2485 | !regdom_changes(driver_request->alpha2)) | |
2486 | return REG_REQ_ALREADY_SET; | |
2487 | ||
2488 | return REG_REQ_INTERSECT; | |
2489 | } | |
2490 | ||
2491 | /** | |
2492 | * reg_process_hint_driver - process driver regulatory requests | |
2493 | * @driver_request: a pending driver regulatory request | |
2494 | * | |
2495 | * The wireless subsystem can use this function to process | |
2496 | * a regulatory request issued by an 802.11 driver. | |
2497 | * | |
2498 | * Returns one of the different reg request treatment values. | |
2499 | */ | |
2500 | static enum reg_request_treatment | |
2501 | reg_process_hint_driver(struct wiphy *wiphy, | |
2502 | struct regulatory_request *driver_request) | |
2503 | { | |
34f05f54 | 2504 | const struct ieee80211_regdomain *regd, *tmp; |
21636c7f | 2505 | enum reg_request_treatment treatment; |
21636c7f LR |
2506 | |
2507 | treatment = __reg_process_hint_driver(driver_request); | |
2508 | ||
2509 | switch (treatment) { | |
2510 | case REG_REQ_OK: | |
2511 | break; | |
2512 | case REG_REQ_IGNORE: | |
d34265a3 | 2513 | return REG_REQ_IGNORE; |
21636c7f | 2514 | case REG_REQ_INTERSECT: |
21636c7f LR |
2515 | case REG_REQ_ALREADY_SET: |
2516 | regd = reg_copy_regd(get_cfg80211_regdom()); | |
d34265a3 JB |
2517 | if (IS_ERR(regd)) |
2518 | return REG_REQ_IGNORE; | |
34f05f54 AN |
2519 | |
2520 | tmp = get_wiphy_regdom(wiphy); | |
21636c7f | 2521 | rcu_assign_pointer(wiphy->regd, regd); |
34f05f54 | 2522 | rcu_free_regdom(tmp); |
21636c7f LR |
2523 | } |
2524 | ||
21636c7f LR |
2525 | |
2526 | driver_request->intersect = treatment == REG_REQ_INTERSECT; | |
2527 | driver_request->processed = false; | |
5ad6ef5e | 2528 | |
21636c7f LR |
2529 | /* |
2530 | * Since CRDA will not be called in this case as we already | |
2531 | * have applied the requested regulatory domain before we just | |
2532 | * inform userspace we have processed the request | |
2533 | */ | |
2534 | if (treatment == REG_REQ_ALREADY_SET) { | |
2535 | nl80211_send_reg_change_event(driver_request); | |
25b20dbd | 2536 | reg_update_last_request(driver_request); |
21636c7f | 2537 | reg_set_request_processed(); |
480908a7 | 2538 | return REG_REQ_ALREADY_SET; |
21636c7f LR |
2539 | } |
2540 | ||
d34265a3 | 2541 | if (reg_query_database(driver_request)) { |
25b20dbd | 2542 | reg_update_last_request(driver_request); |
d34265a3 JB |
2543 | return REG_REQ_OK; |
2544 | } | |
25b20dbd | 2545 | |
d34265a3 | 2546 | return REG_REQ_IGNORE; |
21636c7f LR |
2547 | } |
2548 | ||
b23e7a9e LR |
2549 | static enum reg_request_treatment |
2550 | __reg_process_hint_country_ie(struct wiphy *wiphy, | |
2551 | struct regulatory_request *country_ie_request) | |
2552 | { | |
2553 | struct wiphy *last_wiphy = NULL; | |
2554 | struct regulatory_request *lr = get_last_request(); | |
2555 | ||
2556 | if (reg_request_cell_base(lr)) { | |
2557 | /* Trust a Cell base station over the AP's country IE */ | |
2558 | if (regdom_changes(country_ie_request->alpha2)) | |
2559 | return REG_REQ_IGNORE; | |
2560 | return REG_REQ_ALREADY_SET; | |
2a901468 LR |
2561 | } else { |
2562 | if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE) | |
2563 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
2564 | } |
2565 | ||
b23e7a9e LR |
2566 | if (unlikely(!is_an_alpha2(country_ie_request->alpha2))) |
2567 | return -EINVAL; | |
2f1c6c57 LR |
2568 | |
2569 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
2570 | return REG_REQ_OK; | |
2571 | ||
2572 | last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
2573 | ||
2574 | if (last_wiphy != wiphy) { | |
b23e7a9e | 2575 | /* |
2f1c6c57 LR |
2576 | * Two cards with two APs claiming different |
2577 | * Country IE alpha2s. We could | |
2578 | * intersect them, but that seems unlikely | |
2579 | * to be correct. Reject second one for now. | |
b23e7a9e | 2580 | */ |
2f1c6c57 LR |
2581 | if (regdom_changes(country_ie_request->alpha2)) |
2582 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
2583 | return REG_REQ_ALREADY_SET; |
2584 | } | |
70dcec5a EG |
2585 | |
2586 | if (regdom_changes(country_ie_request->alpha2)) | |
2f1c6c57 LR |
2587 | return REG_REQ_OK; |
2588 | return REG_REQ_ALREADY_SET; | |
b23e7a9e LR |
2589 | } |
2590 | ||
d1c96a9a | 2591 | /** |
b23e7a9e LR |
2592 | * reg_process_hint_country_ie - process regulatory requests from country IEs |
2593 | * @country_ie_request: a regulatory request from a country IE | |
d1c96a9a | 2594 | * |
b23e7a9e LR |
2595 | * The wireless subsystem can use this function to process |
2596 | * a regulatory request issued by a country Information Element. | |
d1c96a9a | 2597 | * |
2f92212b | 2598 | * Returns one of the different reg request treatment values. |
d1c96a9a | 2599 | */ |
2f92212b | 2600 | static enum reg_request_treatment |
b23e7a9e LR |
2601 | reg_process_hint_country_ie(struct wiphy *wiphy, |
2602 | struct regulatory_request *country_ie_request) | |
b2e1b302 | 2603 | { |
2f92212b | 2604 | enum reg_request_treatment treatment; |
761cf7ec | 2605 | |
b23e7a9e | 2606 | treatment = __reg_process_hint_country_ie(wiphy, country_ie_request); |
9c96477d | 2607 | |
2f92212b | 2608 | switch (treatment) { |
2f92212b JB |
2609 | case REG_REQ_OK: |
2610 | break; | |
b23e7a9e | 2611 | case REG_REQ_IGNORE: |
d34265a3 | 2612 | return REG_REQ_IGNORE; |
b23e7a9e | 2613 | case REG_REQ_ALREADY_SET: |
c888393b | 2614 | reg_free_request(country_ie_request); |
480908a7 | 2615 | return REG_REQ_ALREADY_SET; |
b23e7a9e | 2616 | case REG_REQ_INTERSECT: |
fb1fc7ad | 2617 | /* |
b23e7a9e LR |
2618 | * This doesn't happen yet, not sure we |
2619 | * ever want to support it for this case. | |
fb1fc7ad | 2620 | */ |
8db0c433 | 2621 | WARN_ONCE(1, "Unexpected intersection for country elements"); |
d34265a3 | 2622 | return REG_REQ_IGNORE; |
3e0c3ff3 | 2623 | } |
b2e1b302 | 2624 | |
b23e7a9e LR |
2625 | country_ie_request->intersect = false; |
2626 | country_ie_request->processed = false; | |
5ad6ef5e | 2627 | |
d34265a3 | 2628 | if (reg_query_database(country_ie_request)) { |
25b20dbd | 2629 | reg_update_last_request(country_ie_request); |
d34265a3 JB |
2630 | return REG_REQ_OK; |
2631 | } | |
3e0c3ff3 | 2632 | |
d34265a3 | 2633 | return REG_REQ_IGNORE; |
b2e1b302 LR |
2634 | } |
2635 | ||
89766727 VT |
2636 | bool reg_dfs_domain_same(struct wiphy *wiphy1, struct wiphy *wiphy2) |
2637 | { | |
2638 | const struct ieee80211_regdomain *wiphy1_regd = NULL; | |
2639 | const struct ieee80211_regdomain *wiphy2_regd = NULL; | |
2640 | const struct ieee80211_regdomain *cfg80211_regd = NULL; | |
2641 | bool dfs_domain_same; | |
2642 | ||
2643 | rcu_read_lock(); | |
2644 | ||
2645 | cfg80211_regd = rcu_dereference(cfg80211_regdomain); | |
2646 | wiphy1_regd = rcu_dereference(wiphy1->regd); | |
2647 | if (!wiphy1_regd) | |
2648 | wiphy1_regd = cfg80211_regd; | |
2649 | ||
2650 | wiphy2_regd = rcu_dereference(wiphy2->regd); | |
2651 | if (!wiphy2_regd) | |
2652 | wiphy2_regd = cfg80211_regd; | |
2653 | ||
2654 | dfs_domain_same = wiphy1_regd->dfs_region == wiphy2_regd->dfs_region; | |
2655 | ||
2656 | rcu_read_unlock(); | |
2657 | ||
2658 | return dfs_domain_same; | |
2659 | } | |
2660 | ||
2661 | static void reg_copy_dfs_chan_state(struct ieee80211_channel *dst_chan, | |
2662 | struct ieee80211_channel *src_chan) | |
2663 | { | |
2664 | if (!(dst_chan->flags & IEEE80211_CHAN_RADAR) || | |
2665 | !(src_chan->flags & IEEE80211_CHAN_RADAR)) | |
2666 | return; | |
2667 | ||
2668 | if (dst_chan->flags & IEEE80211_CHAN_DISABLED || | |
2669 | src_chan->flags & IEEE80211_CHAN_DISABLED) | |
2670 | return; | |
2671 | ||
2672 | if (src_chan->center_freq == dst_chan->center_freq && | |
2673 | dst_chan->dfs_state == NL80211_DFS_USABLE) { | |
2674 | dst_chan->dfs_state = src_chan->dfs_state; | |
2675 | dst_chan->dfs_state_entered = src_chan->dfs_state_entered; | |
2676 | } | |
2677 | } | |
2678 | ||
2679 | static void wiphy_share_dfs_chan_state(struct wiphy *dst_wiphy, | |
2680 | struct wiphy *src_wiphy) | |
2681 | { | |
2682 | struct ieee80211_supported_band *src_sband, *dst_sband; | |
2683 | struct ieee80211_channel *src_chan, *dst_chan; | |
2684 | int i, j, band; | |
2685 | ||
2686 | if (!reg_dfs_domain_same(dst_wiphy, src_wiphy)) | |
2687 | return; | |
2688 | ||
2689 | for (band = 0; band < NUM_NL80211_BANDS; band++) { | |
2690 | dst_sband = dst_wiphy->bands[band]; | |
2691 | src_sband = src_wiphy->bands[band]; | |
2692 | if (!dst_sband || !src_sband) | |
2693 | continue; | |
2694 | ||
2695 | for (i = 0; i < dst_sband->n_channels; i++) { | |
2696 | dst_chan = &dst_sband->channels[i]; | |
2697 | for (j = 0; j < src_sband->n_channels; j++) { | |
2698 | src_chan = &src_sband->channels[j]; | |
2699 | reg_copy_dfs_chan_state(dst_chan, src_chan); | |
2700 | } | |
2701 | } | |
2702 | } | |
2703 | } | |
2704 | ||
2705 | static void wiphy_all_share_dfs_chan_state(struct wiphy *wiphy) | |
2706 | { | |
2707 | struct cfg80211_registered_device *rdev; | |
2708 | ||
2709 | ASSERT_RTNL(); | |
2710 | ||
2711 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
2712 | if (wiphy == &rdev->wiphy) | |
2713 | continue; | |
2714 | wiphy_share_dfs_chan_state(wiphy, &rdev->wiphy); | |
2715 | } | |
2716 | } | |
2717 | ||
30a548c7 | 2718 | /* This processes *all* regulatory hints */ |
1daa37c7 | 2719 | static void reg_process_hint(struct regulatory_request *reg_request) |
fe33eb39 | 2720 | { |
fe33eb39 | 2721 | struct wiphy *wiphy = NULL; |
b3eb7f3f | 2722 | enum reg_request_treatment treatment; |
1db58529 | 2723 | enum nl80211_reg_initiator initiator = reg_request->initiator; |
fe33eb39 | 2724 | |
f4173766 | 2725 | if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) |
fe33eb39 LR |
2726 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
2727 | ||
1db58529 | 2728 | switch (initiator) { |
b3eb7f3f | 2729 | case NL80211_REGDOM_SET_BY_CORE: |
d34265a3 JB |
2730 | treatment = reg_process_hint_core(reg_request); |
2731 | break; | |
b3eb7f3f | 2732 | case NL80211_REGDOM_SET_BY_USER: |
d34265a3 JB |
2733 | treatment = reg_process_hint_user(reg_request); |
2734 | break; | |
b3eb7f3f | 2735 | case NL80211_REGDOM_SET_BY_DRIVER: |
772f0389 IP |
2736 | if (!wiphy) |
2737 | goto out_free; | |
21636c7f LR |
2738 | treatment = reg_process_hint_driver(wiphy, reg_request); |
2739 | break; | |
b3eb7f3f | 2740 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
772f0389 IP |
2741 | if (!wiphy) |
2742 | goto out_free; | |
b23e7a9e | 2743 | treatment = reg_process_hint_country_ie(wiphy, reg_request); |
b3eb7f3f LR |
2744 | break; |
2745 | default: | |
1db58529 | 2746 | WARN(1, "invalid initiator %d\n", initiator); |
772f0389 | 2747 | goto out_free; |
b3eb7f3f LR |
2748 | } |
2749 | ||
d34265a3 JB |
2750 | if (treatment == REG_REQ_IGNORE) |
2751 | goto out_free; | |
2752 | ||
480908a7 JB |
2753 | WARN(treatment != REG_REQ_OK && treatment != REG_REQ_ALREADY_SET, |
2754 | "unexpected treatment value %d\n", treatment); | |
2755 | ||
841b351c JL |
2756 | /* This is required so that the orig_* parameters are saved. |
2757 | * NOTE: treatment must be set for any case that reaches here! | |
2758 | */ | |
b23e7a9e | 2759 | if (treatment == REG_REQ_ALREADY_SET && wiphy && |
ad932f04 | 2760 | wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
1db58529 | 2761 | wiphy_update_regulatory(wiphy, initiator); |
89766727 | 2762 | wiphy_all_share_dfs_chan_state(wiphy); |
ad932f04 AN |
2763 | reg_check_channels(); |
2764 | } | |
772f0389 IP |
2765 | |
2766 | return; | |
2767 | ||
2768 | out_free: | |
c888393b | 2769 | reg_free_request(reg_request); |
fe33eb39 LR |
2770 | } |
2771 | ||
aced43ce AS |
2772 | static void notify_self_managed_wiphys(struct regulatory_request *request) |
2773 | { | |
2774 | struct cfg80211_registered_device *rdev; | |
2775 | struct wiphy *wiphy; | |
2776 | ||
2777 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
2778 | wiphy = &rdev->wiphy; | |
2779 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED && | |
c82c06ce | 2780 | request->initiator == NL80211_REGDOM_SET_BY_USER) |
aced43ce AS |
2781 | reg_call_notifier(wiphy, request); |
2782 | } | |
2783 | } | |
2784 | ||
b2e253cf LR |
2785 | /* |
2786 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
2787 | * Regulatory hints come on a first come first serve basis and we | |
2788 | * must process each one atomically. | |
2789 | */ | |
fe33eb39 | 2790 | static void reg_process_pending_hints(void) |
b0e2880b | 2791 | { |
c492db37 | 2792 | struct regulatory_request *reg_request, *lr; |
fe33eb39 | 2793 | |
c492db37 | 2794 | lr = get_last_request(); |
b0e2880b | 2795 | |
b2e253cf | 2796 | /* When last_request->processed becomes true this will be rescheduled */ |
c492db37 | 2797 | if (lr && !lr->processed) { |
0d31d4db | 2798 | pr_debug("Pending regulatory request, waiting for it to be processed...\n"); |
5fe231e8 | 2799 | return; |
b2e253cf LR |
2800 | } |
2801 | ||
fe33eb39 | 2802 | spin_lock(®_requests_lock); |
fe33eb39 | 2803 | |
b2e253cf | 2804 | if (list_empty(®_requests_list)) { |
d951c1dd | 2805 | spin_unlock(®_requests_lock); |
5fe231e8 | 2806 | return; |
fe33eb39 | 2807 | } |
b2e253cf LR |
2808 | |
2809 | reg_request = list_first_entry(®_requests_list, | |
2810 | struct regulatory_request, | |
2811 | list); | |
2812 | list_del_init(®_request->list); | |
2813 | ||
fe33eb39 | 2814 | spin_unlock(®_requests_lock); |
b0e2880b | 2815 | |
aced43ce | 2816 | notify_self_managed_wiphys(reg_request); |
ef51fb1d | 2817 | |
1daa37c7 | 2818 | reg_process_hint(reg_request); |
2e54a689 B |
2819 | |
2820 | lr = get_last_request(); | |
2821 | ||
2822 | spin_lock(®_requests_lock); | |
2823 | if (!list_empty(®_requests_list) && lr && lr->processed) | |
2824 | schedule_work(®_work); | |
2825 | spin_unlock(®_requests_lock); | |
fe33eb39 LR |
2826 | } |
2827 | ||
e38f8a7a LR |
2828 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
2829 | static void reg_process_pending_beacon_hints(void) | |
2830 | { | |
79c97e97 | 2831 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
2832 | struct reg_beacon *pending_beacon, *tmp; |
2833 | ||
e38f8a7a LR |
2834 | /* This goes through the _pending_ beacon list */ |
2835 | spin_lock_bh(®_pending_beacons_lock); | |
2836 | ||
e38f8a7a LR |
2837 | list_for_each_entry_safe(pending_beacon, tmp, |
2838 | ®_pending_beacons, list) { | |
e38f8a7a LR |
2839 | list_del_init(&pending_beacon->list); |
2840 | ||
2841 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
2842 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
2843 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
2844 | |
2845 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
2846 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
2847 | } | |
2848 | ||
2849 | spin_unlock_bh(®_pending_beacons_lock); | |
e38f8a7a LR |
2850 | } |
2851 | ||
b0d7aa59 JD |
2852 | static void reg_process_self_managed_hints(void) |
2853 | { | |
2854 | struct cfg80211_registered_device *rdev; | |
2855 | struct wiphy *wiphy; | |
2856 | const struct ieee80211_regdomain *tmp; | |
2857 | const struct ieee80211_regdomain *regd; | |
57fbcce3 | 2858 | enum nl80211_band band; |
b0d7aa59 JD |
2859 | struct regulatory_request request = {}; |
2860 | ||
2861 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
2862 | wiphy = &rdev->wiphy; | |
2863 | ||
2864 | spin_lock(®_requests_lock); | |
2865 | regd = rdev->requested_regd; | |
2866 | rdev->requested_regd = NULL; | |
2867 | spin_unlock(®_requests_lock); | |
2868 | ||
2869 | if (regd == NULL) | |
2870 | continue; | |
2871 | ||
2872 | tmp = get_wiphy_regdom(wiphy); | |
2873 | rcu_assign_pointer(wiphy->regd, regd); | |
2874 | rcu_free_regdom(tmp); | |
2875 | ||
57fbcce3 | 2876 | for (band = 0; band < NUM_NL80211_BANDS; band++) |
b0d7aa59 JD |
2877 | handle_band_custom(wiphy, wiphy->bands[band], regd); |
2878 | ||
2879 | reg_process_ht_flags(wiphy); | |
2880 | ||
2881 | request.wiphy_idx = get_wiphy_idx(wiphy); | |
2882 | request.alpha2[0] = regd->alpha2[0]; | |
2883 | request.alpha2[1] = regd->alpha2[1]; | |
2884 | request.initiator = NL80211_REGDOM_SET_BY_DRIVER; | |
2885 | ||
2886 | nl80211_send_wiphy_reg_change_event(&request); | |
2887 | } | |
2888 | ||
2889 | reg_check_channels(); | |
2890 | } | |
2891 | ||
fe33eb39 LR |
2892 | static void reg_todo(struct work_struct *work) |
2893 | { | |
5fe231e8 | 2894 | rtnl_lock(); |
fe33eb39 | 2895 | reg_process_pending_hints(); |
e38f8a7a | 2896 | reg_process_pending_beacon_hints(); |
b0d7aa59 | 2897 | reg_process_self_managed_hints(); |
5fe231e8 | 2898 | rtnl_unlock(); |
fe33eb39 LR |
2899 | } |
2900 | ||
fe33eb39 LR |
2901 | static void queue_regulatory_request(struct regulatory_request *request) |
2902 | { | |
d4f2c881 JB |
2903 | request->alpha2[0] = toupper(request->alpha2[0]); |
2904 | request->alpha2[1] = toupper(request->alpha2[1]); | |
c61029c7 | 2905 | |
fe33eb39 LR |
2906 | spin_lock(®_requests_lock); |
2907 | list_add_tail(&request->list, ®_requests_list); | |
2908 | spin_unlock(®_requests_lock); | |
2909 | ||
2910 | schedule_work(®_work); | |
2911 | } | |
2912 | ||
09d989d1 LR |
2913 | /* |
2914 | * Core regulatory hint -- happens during cfg80211_init() | |
2915 | * and when we restore regulatory settings. | |
2916 | */ | |
ba25c141 LR |
2917 | static int regulatory_hint_core(const char *alpha2) |
2918 | { | |
2919 | struct regulatory_request *request; | |
2920 | ||
1a919318 | 2921 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
ba25c141 LR |
2922 | if (!request) |
2923 | return -ENOMEM; | |
2924 | ||
2925 | request->alpha2[0] = alpha2[0]; | |
2926 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2927 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
24f33e64 | 2928 | request->wiphy_idx = WIPHY_IDX_INVALID; |
ba25c141 | 2929 | |
31e99729 | 2930 | queue_regulatory_request(request); |
5078b2e3 | 2931 | |
fe33eb39 | 2932 | return 0; |
ba25c141 LR |
2933 | } |
2934 | ||
fe33eb39 | 2935 | /* User hints */ |
57b5ce07 LR |
2936 | int regulatory_hint_user(const char *alpha2, |
2937 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 2938 | { |
fe33eb39 LR |
2939 | struct regulatory_request *request; |
2940 | ||
fdc9d7b2 JB |
2941 | if (WARN_ON(!alpha2)) |
2942 | return -EINVAL; | |
b2e1b302 | 2943 | |
fe33eb39 LR |
2944 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
2945 | if (!request) | |
2946 | return -ENOMEM; | |
2947 | ||
f4173766 | 2948 | request->wiphy_idx = WIPHY_IDX_INVALID; |
fe33eb39 LR |
2949 | request->alpha2[0] = alpha2[0]; |
2950 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 2951 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 2952 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 | 2953 | |
c37722bd | 2954 | /* Allow calling CRDA again */ |
b6863036 | 2955 | reset_crda_timeouts(); |
c37722bd | 2956 | |
fe33eb39 LR |
2957 | queue_regulatory_request(request); |
2958 | ||
2959 | return 0; | |
2960 | } | |
2961 | ||
05050753 | 2962 | int regulatory_hint_indoor(bool is_indoor, u32 portid) |
52616f2b | 2963 | { |
05050753 | 2964 | spin_lock(®_indoor_lock); |
52616f2b | 2965 | |
05050753 I |
2966 | /* It is possible that more than one user space process is trying to |
2967 | * configure the indoor setting. To handle such cases, clear the indoor | |
2968 | * setting in case that some process does not think that the device | |
2969 | * is operating in an indoor environment. In addition, if a user space | |
2970 | * process indicates that it is controlling the indoor setting, save its | |
2971 | * portid, i.e., make it the owner. | |
2972 | */ | |
2973 | reg_is_indoor = is_indoor; | |
2974 | if (reg_is_indoor) { | |
2975 | if (!reg_is_indoor_portid) | |
2976 | reg_is_indoor_portid = portid; | |
2977 | } else { | |
2978 | reg_is_indoor_portid = 0; | |
2979 | } | |
52616f2b | 2980 | |
05050753 | 2981 | spin_unlock(®_indoor_lock); |
52616f2b | 2982 | |
05050753 I |
2983 | if (!is_indoor) |
2984 | reg_check_channels(); | |
52616f2b IP |
2985 | |
2986 | return 0; | |
2987 | } | |
2988 | ||
05050753 I |
2989 | void regulatory_netlink_notify(u32 portid) |
2990 | { | |
2991 | spin_lock(®_indoor_lock); | |
2992 | ||
2993 | if (reg_is_indoor_portid != portid) { | |
2994 | spin_unlock(®_indoor_lock); | |
2995 | return; | |
2996 | } | |
2997 | ||
2998 | reg_is_indoor = false; | |
2999 | reg_is_indoor_portid = 0; | |
3000 | ||
3001 | spin_unlock(®_indoor_lock); | |
3002 | ||
3003 | reg_check_channels(); | |
3004 | } | |
3005 | ||
fe33eb39 LR |
3006 | /* Driver hints */ |
3007 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
3008 | { | |
3009 | struct regulatory_request *request; | |
3010 | ||
fdc9d7b2 JB |
3011 | if (WARN_ON(!alpha2 || !wiphy)) |
3012 | return -EINVAL; | |
fe33eb39 | 3013 | |
4f7b9140 LR |
3014 | wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG; |
3015 | ||
fe33eb39 LR |
3016 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
3017 | if (!request) | |
3018 | return -ENOMEM; | |
3019 | ||
3020 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
3021 | ||
fe33eb39 LR |
3022 | request->alpha2[0] = alpha2[0]; |
3023 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 3024 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 | 3025 | |
c37722bd | 3026 | /* Allow calling CRDA again */ |
b6863036 | 3027 | reset_crda_timeouts(); |
c37722bd | 3028 | |
fe33eb39 LR |
3029 | queue_regulatory_request(request); |
3030 | ||
3031 | return 0; | |
b2e1b302 LR |
3032 | } |
3033 | EXPORT_SYMBOL(regulatory_hint); | |
3034 | ||
57fbcce3 | 3035 | void regulatory_hint_country_ie(struct wiphy *wiphy, enum nl80211_band band, |
789fd033 | 3036 | const u8 *country_ie, u8 country_ie_len) |
3f2355cb | 3037 | { |
3f2355cb | 3038 | char alpha2[2]; |
3f2355cb | 3039 | enum environment_cap env = ENVIRON_ANY; |
db2424c5 | 3040 | struct regulatory_request *request = NULL, *lr; |
d335fe63 | 3041 | |
3f2355cb LR |
3042 | /* IE len must be evenly divisible by 2 */ |
3043 | if (country_ie_len & 0x01) | |
db2424c5 | 3044 | return; |
3f2355cb LR |
3045 | |
3046 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
db2424c5 JB |
3047 | return; |
3048 | ||
3049 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
3050 | if (!request) | |
3051 | return; | |
3f2355cb | 3052 | |
3f2355cb LR |
3053 | alpha2[0] = country_ie[0]; |
3054 | alpha2[1] = country_ie[1]; | |
3055 | ||
3056 | if (country_ie[2] == 'I') | |
3057 | env = ENVIRON_INDOOR; | |
3058 | else if (country_ie[2] == 'O') | |
3059 | env = ENVIRON_OUTDOOR; | |
3060 | ||
db2424c5 JB |
3061 | rcu_read_lock(); |
3062 | lr = get_last_request(); | |
3063 | ||
3064 | if (unlikely(!lr)) | |
3065 | goto out; | |
3066 | ||
fb1fc7ad | 3067 | /* |
8b19e6ca | 3068 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc | 3069 | * We leave conflict resolution to the workqueue, where can hold |
5fe231e8 | 3070 | * the RTNL. |
fb1fc7ad | 3071 | */ |
c492db37 JB |
3072 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
3073 | lr->wiphy_idx != WIPHY_IDX_INVALID) | |
4b44c8bc | 3074 | goto out; |
3f2355cb | 3075 | |
fe33eb39 | 3076 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
3077 | request->alpha2[0] = alpha2[0]; |
3078 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 3079 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
3080 | request->country_ie_env = env; |
3081 | ||
c37722bd | 3082 | /* Allow calling CRDA again */ |
b6863036 | 3083 | reset_crda_timeouts(); |
c37722bd | 3084 | |
fe33eb39 | 3085 | queue_regulatory_request(request); |
db2424c5 | 3086 | request = NULL; |
3f2355cb | 3087 | out: |
db2424c5 JB |
3088 | kfree(request); |
3089 | rcu_read_unlock(); | |
3f2355cb | 3090 | } |
b2e1b302 | 3091 | |
09d989d1 LR |
3092 | static void restore_alpha2(char *alpha2, bool reset_user) |
3093 | { | |
3094 | /* indicates there is no alpha2 to consider for restoration */ | |
3095 | alpha2[0] = '9'; | |
3096 | alpha2[1] = '7'; | |
3097 | ||
3098 | /* The user setting has precedence over the module parameter */ | |
3099 | if (is_user_regdom_saved()) { | |
3100 | /* Unless we're asked to ignore it and reset it */ | |
3101 | if (reset_user) { | |
c799ba6e | 3102 | pr_debug("Restoring regulatory settings including user preference\n"); |
09d989d1 LR |
3103 | user_alpha2[0] = '9'; |
3104 | user_alpha2[1] = '7'; | |
3105 | ||
3106 | /* | |
3107 | * If we're ignoring user settings, we still need to | |
3108 | * check the module parameter to ensure we put things | |
3109 | * back as they were for a full restore. | |
3110 | */ | |
3111 | if (!is_world_regdom(ieee80211_regdom)) { | |
c799ba6e JB |
3112 | pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
3113 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
3114 | alpha2[0] = ieee80211_regdom[0]; |
3115 | alpha2[1] = ieee80211_regdom[1]; | |
3116 | } | |
3117 | } else { | |
c799ba6e JB |
3118 | pr_debug("Restoring regulatory settings while preserving user preference for: %c%c\n", |
3119 | user_alpha2[0], user_alpha2[1]); | |
09d989d1 LR |
3120 | alpha2[0] = user_alpha2[0]; |
3121 | alpha2[1] = user_alpha2[1]; | |
3122 | } | |
3123 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
c799ba6e JB |
3124 | pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
3125 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
3126 | alpha2[0] = ieee80211_regdom[0]; |
3127 | alpha2[1] = ieee80211_regdom[1]; | |
3128 | } else | |
c799ba6e | 3129 | pr_debug("Restoring regulatory settings\n"); |
09d989d1 LR |
3130 | } |
3131 | ||
5ce543d1 RM |
3132 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
3133 | { | |
3134 | struct ieee80211_supported_band *sband; | |
57fbcce3 | 3135 | enum nl80211_band band; |
5ce543d1 RM |
3136 | struct ieee80211_channel *chan; |
3137 | int i; | |
3138 | ||
57fbcce3 | 3139 | for (band = 0; band < NUM_NL80211_BANDS; band++) { |
5ce543d1 RM |
3140 | sband = wiphy->bands[band]; |
3141 | if (!sband) | |
3142 | continue; | |
3143 | for (i = 0; i < sband->n_channels; i++) { | |
3144 | chan = &sband->channels[i]; | |
3145 | chan->flags = chan->orig_flags; | |
3146 | chan->max_antenna_gain = chan->orig_mag; | |
3147 | chan->max_power = chan->orig_mpwr; | |
899852af | 3148 | chan->beacon_found = false; |
5ce543d1 RM |
3149 | } |
3150 | } | |
3151 | } | |
3152 | ||
09d989d1 LR |
3153 | /* |
3154 | * Restoring regulatory settings involves ingoring any | |
3155 | * possibly stale country IE information and user regulatory | |
3156 | * settings if so desired, this includes any beacon hints | |
3157 | * learned as we could have traveled outside to another country | |
3158 | * after disconnection. To restore regulatory settings we do | |
3159 | * exactly what we did at bootup: | |
3160 | * | |
3161 | * - send a core regulatory hint | |
3162 | * - send a user regulatory hint if applicable | |
3163 | * | |
3164 | * Device drivers that send a regulatory hint for a specific country | |
3165 | * keep their own regulatory domain on wiphy->regd so that does does | |
3166 | * not need to be remembered. | |
3167 | */ | |
e646a025 | 3168 | static void restore_regulatory_settings(bool reset_user, bool cached) |
09d989d1 LR |
3169 | { |
3170 | char alpha2[2]; | |
cee0bec5 | 3171 | char world_alpha2[2]; |
09d989d1 | 3172 | struct reg_beacon *reg_beacon, *btmp; |
14609555 | 3173 | LIST_HEAD(tmp_reg_req_list); |
5ce543d1 | 3174 | struct cfg80211_registered_device *rdev; |
09d989d1 | 3175 | |
5fe231e8 JB |
3176 | ASSERT_RTNL(); |
3177 | ||
05050753 I |
3178 | /* |
3179 | * Clear the indoor setting in case that it is not controlled by user | |
3180 | * space, as otherwise there is no guarantee that the device is still | |
3181 | * operating in an indoor environment. | |
3182 | */ | |
3183 | spin_lock(®_indoor_lock); | |
3184 | if (reg_is_indoor && !reg_is_indoor_portid) { | |
3185 | reg_is_indoor = false; | |
3186 | reg_check_channels(); | |
3187 | } | |
3188 | spin_unlock(®_indoor_lock); | |
52616f2b | 3189 | |
2d319867 | 3190 | reset_regdomains(true, &world_regdom); |
09d989d1 LR |
3191 | restore_alpha2(alpha2, reset_user); |
3192 | ||
14609555 LR |
3193 | /* |
3194 | * If there's any pending requests we simply | |
3195 | * stash them to a temporary pending queue and | |
3196 | * add then after we've restored regulatory | |
3197 | * settings. | |
3198 | */ | |
3199 | spin_lock(®_requests_lock); | |
eeca9fce | 3200 | list_splice_tail_init(®_requests_list, &tmp_reg_req_list); |
14609555 LR |
3201 | spin_unlock(®_requests_lock); |
3202 | ||
09d989d1 LR |
3203 | /* Clear beacon hints */ |
3204 | spin_lock_bh(®_pending_beacons_lock); | |
fea9bced JB |
3205 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
3206 | list_del(®_beacon->list); | |
3207 | kfree(reg_beacon); | |
09d989d1 LR |
3208 | } |
3209 | spin_unlock_bh(®_pending_beacons_lock); | |
3210 | ||
fea9bced JB |
3211 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
3212 | list_del(®_beacon->list); | |
3213 | kfree(reg_beacon); | |
09d989d1 LR |
3214 | } |
3215 | ||
3216 | /* First restore to the basic regulatory settings */ | |
379b82f4 JB |
3217 | world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; |
3218 | world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; | |
09d989d1 | 3219 | |
5ce543d1 | 3220 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
b0d7aa59 JD |
3221 | if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) |
3222 | continue; | |
a2f73b6c | 3223 | if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG) |
5ce543d1 RM |
3224 | restore_custom_reg_settings(&rdev->wiphy); |
3225 | } | |
3226 | ||
e646a025 JB |
3227 | if (cached && (!is_an_alpha2(alpha2) || |
3228 | !IS_ERR_OR_NULL(cfg80211_user_regdom))) { | |
3229 | reset_regdomains(false, cfg80211_world_regdom); | |
3230 | update_all_wiphy_regulatory(NL80211_REGDOM_SET_BY_CORE); | |
3231 | print_regdomain(get_cfg80211_regdom()); | |
3232 | nl80211_send_reg_change_event(&core_request_world); | |
3233 | reg_set_request_processed(); | |
09d989d1 | 3234 | |
e646a025 JB |
3235 | if (is_an_alpha2(alpha2) && |
3236 | !regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER)) { | |
3237 | struct regulatory_request *ureq; | |
3238 | ||
3239 | spin_lock(®_requests_lock); | |
3240 | ureq = list_last_entry(®_requests_list, | |
3241 | struct regulatory_request, | |
3242 | list); | |
3243 | list_del(&ureq->list); | |
3244 | spin_unlock(®_requests_lock); | |
3245 | ||
3246 | notify_self_managed_wiphys(ureq); | |
3247 | reg_update_last_request(ureq); | |
3248 | set_regdom(reg_copy_regd(cfg80211_user_regdom), | |
3249 | REGD_SOURCE_CACHED); | |
3250 | } | |
3251 | } else { | |
3252 | regulatory_hint_core(world_alpha2); | |
3253 | ||
3254 | /* | |
3255 | * This restores the ieee80211_regdom module parameter | |
3256 | * preference or the last user requested regulatory | |
3257 | * settings, user regulatory settings takes precedence. | |
3258 | */ | |
3259 | if (is_an_alpha2(alpha2)) | |
3260 | regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER); | |
3261 | } | |
09d989d1 | 3262 | |
14609555 | 3263 | spin_lock(®_requests_lock); |
11cff96c | 3264 | list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); |
14609555 LR |
3265 | spin_unlock(®_requests_lock); |
3266 | ||
c799ba6e | 3267 | pr_debug("Kicking the queue\n"); |
14609555 LR |
3268 | |
3269 | schedule_work(®_work); | |
3270 | } | |
09d989d1 | 3271 | |
7417844b RKS |
3272 | static bool is_wiphy_all_set_reg_flag(enum ieee80211_regulatory_flags flag) |
3273 | { | |
3274 | struct cfg80211_registered_device *rdev; | |
3275 | struct wireless_dev *wdev; | |
3276 | ||
3277 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
3278 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { | |
3279 | wdev_lock(wdev); | |
3280 | if (!(wdev->wiphy->regulatory_flags & flag)) { | |
3281 | wdev_unlock(wdev); | |
3282 | return false; | |
3283 | } | |
3284 | wdev_unlock(wdev); | |
3285 | } | |
3286 | } | |
3287 | ||
3288 | return true; | |
3289 | } | |
3290 | ||
09d989d1 LR |
3291 | void regulatory_hint_disconnect(void) |
3292 | { | |
7417844b RKS |
3293 | /* Restore of regulatory settings is not required when wiphy(s) |
3294 | * ignore IE from connected access point but clearance of beacon hints | |
3295 | * is required when wiphy(s) supports beacon hints. | |
3296 | */ | |
3297 | if (is_wiphy_all_set_reg_flag(REGULATORY_COUNTRY_IE_IGNORE)) { | |
3298 | struct reg_beacon *reg_beacon, *btmp; | |
3299 | ||
3300 | if (is_wiphy_all_set_reg_flag(REGULATORY_DISABLE_BEACON_HINTS)) | |
3301 | return; | |
3302 | ||
3303 | spin_lock_bh(®_pending_beacons_lock); | |
3304 | list_for_each_entry_safe(reg_beacon, btmp, | |
3305 | ®_pending_beacons, list) { | |
3306 | list_del(®_beacon->list); | |
3307 | kfree(reg_beacon); | |
3308 | } | |
3309 | spin_unlock_bh(®_pending_beacons_lock); | |
3310 | ||
3311 | list_for_each_entry_safe(reg_beacon, btmp, | |
3312 | ®_beacon_list, list) { | |
3313 | list_del(®_beacon->list); | |
3314 | kfree(reg_beacon); | |
3315 | } | |
3316 | ||
3317 | return; | |
3318 | } | |
3319 | ||
c799ba6e | 3320 | pr_debug("All devices are disconnected, going to restore regulatory settings\n"); |
e646a025 | 3321 | restore_regulatory_settings(false, true); |
09d989d1 LR |
3322 | } |
3323 | ||
9cf0a0b4 | 3324 | static bool freq_is_chan_12_13_14(u32 freq) |
e38f8a7a | 3325 | { |
57fbcce3 JB |
3326 | if (freq == ieee80211_channel_to_frequency(12, NL80211_BAND_2GHZ) || |
3327 | freq == ieee80211_channel_to_frequency(13, NL80211_BAND_2GHZ) || | |
3328 | freq == ieee80211_channel_to_frequency(14, NL80211_BAND_2GHZ)) | |
e38f8a7a LR |
3329 | return true; |
3330 | return false; | |
3331 | } | |
3332 | ||
3ebfa6e7 LR |
3333 | static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) |
3334 | { | |
3335 | struct reg_beacon *pending_beacon; | |
3336 | ||
3337 | list_for_each_entry(pending_beacon, ®_pending_beacons, list) | |
3338 | if (beacon_chan->center_freq == | |
3339 | pending_beacon->chan.center_freq) | |
3340 | return true; | |
3341 | return false; | |
3342 | } | |
3343 | ||
e38f8a7a LR |
3344 | int regulatory_hint_found_beacon(struct wiphy *wiphy, |
3345 | struct ieee80211_channel *beacon_chan, | |
3346 | gfp_t gfp) | |
3347 | { | |
3348 | struct reg_beacon *reg_beacon; | |
3ebfa6e7 | 3349 | bool processing; |
e38f8a7a | 3350 | |
1a919318 JB |
3351 | if (beacon_chan->beacon_found || |
3352 | beacon_chan->flags & IEEE80211_CHAN_RADAR || | |
57fbcce3 | 3353 | (beacon_chan->band == NL80211_BAND_2GHZ && |
1a919318 | 3354 | !freq_is_chan_12_13_14(beacon_chan->center_freq))) |
e38f8a7a LR |
3355 | return 0; |
3356 | ||
3ebfa6e7 LR |
3357 | spin_lock_bh(®_pending_beacons_lock); |
3358 | processing = pending_reg_beacon(beacon_chan); | |
3359 | spin_unlock_bh(®_pending_beacons_lock); | |
3360 | ||
3361 | if (processing) | |
e38f8a7a LR |
3362 | return 0; |
3363 | ||
3364 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
3365 | if (!reg_beacon) | |
3366 | return -ENOMEM; | |
3367 | ||
c799ba6e JB |
3368 | pr_debug("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", |
3369 | beacon_chan->center_freq, | |
3370 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
3371 | wiphy_name(wiphy)); | |
4113f751 | 3372 | |
e38f8a7a | 3373 | memcpy(®_beacon->chan, beacon_chan, |
1a919318 | 3374 | sizeof(struct ieee80211_channel)); |
e38f8a7a LR |
3375 | |
3376 | /* | |
3377 | * Since we can be called from BH or and non-BH context | |
3378 | * we must use spin_lock_bh() | |
3379 | */ | |
3380 | spin_lock_bh(®_pending_beacons_lock); | |
3381 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
3382 | spin_unlock_bh(®_pending_beacons_lock); | |
3383 | ||
3384 | schedule_work(®_work); | |
3385 | ||
3386 | return 0; | |
3387 | } | |
3388 | ||
a3d2eaf0 | 3389 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
3390 | { |
3391 | unsigned int i; | |
a3d2eaf0 JB |
3392 | const struct ieee80211_reg_rule *reg_rule = NULL; |
3393 | const struct ieee80211_freq_range *freq_range = NULL; | |
3394 | const struct ieee80211_power_rule *power_rule = NULL; | |
089027e5 | 3395 | char bw[32], cac_time[32]; |
b2e1b302 | 3396 | |
94c4fd64 | 3397 | pr_debug(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n"); |
b2e1b302 LR |
3398 | |
3399 | for (i = 0; i < rd->n_reg_rules; i++) { | |
3400 | reg_rule = &rd->reg_rules[i]; | |
3401 | freq_range = ®_rule->freq_range; | |
3402 | power_rule = ®_rule->power_rule; | |
3403 | ||
b0dfd2ea JD |
3404 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
3405 | snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", | |
3406 | freq_range->max_bandwidth_khz, | |
97524820 JD |
3407 | reg_get_max_bandwidth(rd, reg_rule)); |
3408 | else | |
b0dfd2ea | 3409 | snprintf(bw, sizeof(bw), "%d KHz", |
97524820 JD |
3410 | freq_range->max_bandwidth_khz); |
3411 | ||
089027e5 JD |
3412 | if (reg_rule->flags & NL80211_RRF_DFS) |
3413 | scnprintf(cac_time, sizeof(cac_time), "%u s", | |
3414 | reg_rule->dfs_cac_ms/1000); | |
3415 | else | |
3416 | scnprintf(cac_time, sizeof(cac_time), "N/A"); | |
3417 | ||
3418 | ||
fb1fc7ad LR |
3419 | /* |
3420 | * There may not be documentation for max antenna gain | |
3421 | * in certain regions | |
3422 | */ | |
b2e1b302 | 3423 | if (power_rule->max_antenna_gain) |
94c4fd64 | 3424 | pr_debug(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n", |
b2e1b302 LR |
3425 | freq_range->start_freq_khz, |
3426 | freq_range->end_freq_khz, | |
97524820 | 3427 | bw, |
b2e1b302 | 3428 | power_rule->max_antenna_gain, |
089027e5 JD |
3429 | power_rule->max_eirp, |
3430 | cac_time); | |
b2e1b302 | 3431 | else |
94c4fd64 | 3432 | pr_debug(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n", |
b2e1b302 LR |
3433 | freq_range->start_freq_khz, |
3434 | freq_range->end_freq_khz, | |
97524820 | 3435 | bw, |
089027e5 JD |
3436 | power_rule->max_eirp, |
3437 | cac_time); | |
b2e1b302 LR |
3438 | } |
3439 | } | |
3440 | ||
4c7d3982 | 3441 | bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region) |
8b60b078 LR |
3442 | { |
3443 | switch (dfs_region) { | |
3444 | case NL80211_DFS_UNSET: | |
3445 | case NL80211_DFS_FCC: | |
3446 | case NL80211_DFS_ETSI: | |
3447 | case NL80211_DFS_JP: | |
3448 | return true; | |
3449 | default: | |
4a22b00b | 3450 | pr_debug("Ignoring unknown DFS master region: %d\n", dfs_region); |
8b60b078 LR |
3451 | return false; |
3452 | } | |
3453 | } | |
3454 | ||
a3d2eaf0 | 3455 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 | 3456 | { |
c492db37 | 3457 | struct regulatory_request *lr = get_last_request(); |
b2e1b302 | 3458 | |
3f2355cb | 3459 | if (is_intersected_alpha2(rd->alpha2)) { |
c492db37 | 3460 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
79c97e97 | 3461 | struct cfg80211_registered_device *rdev; |
c492db37 | 3462 | rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); |
79c97e97 | 3463 | if (rdev) { |
94c4fd64 | 3464 | pr_debug("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
3465 | rdev->country_ie_alpha2[0], |
3466 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 3467 | } else |
94c4fd64 | 3468 | pr_debug("Current regulatory domain intersected:\n"); |
3f2355cb | 3469 | } else |
94c4fd64 | 3470 | pr_debug("Current regulatory domain intersected:\n"); |
1a919318 | 3471 | } else if (is_world_regdom(rd->alpha2)) { |
94c4fd64 | 3472 | pr_debug("World regulatory domain updated:\n"); |
1a919318 | 3473 | } else { |
b2e1b302 | 3474 | if (is_unknown_alpha2(rd->alpha2)) |
94c4fd64 | 3475 | pr_debug("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 | 3476 | else { |
c492db37 | 3477 | if (reg_request_cell_base(lr)) |
94c4fd64 | 3478 | pr_debug("Regulatory domain changed to country: %c%c by Cell Station\n", |
57b5ce07 LR |
3479 | rd->alpha2[0], rd->alpha2[1]); |
3480 | else | |
94c4fd64 | 3481 | pr_debug("Regulatory domain changed to country: %c%c\n", |
57b5ce07 LR |
3482 | rd->alpha2[0], rd->alpha2[1]); |
3483 | } | |
b2e1b302 | 3484 | } |
1a919318 | 3485 | |
94c4fd64 | 3486 | pr_debug(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region)); |
b2e1b302 LR |
3487 | print_rd_rules(rd); |
3488 | } | |
3489 | ||
2df78167 | 3490 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 3491 | { |
94c4fd64 | 3492 | pr_debug("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
3493 | print_rd_rules(rd); |
3494 | } | |
3495 | ||
3b9e5aca LR |
3496 | static int reg_set_rd_core(const struct ieee80211_regdomain *rd) |
3497 | { | |
3498 | if (!is_world_regdom(rd->alpha2)) | |
3499 | return -EINVAL; | |
3500 | update_world_regdomain(rd); | |
3501 | return 0; | |
3502 | } | |
3503 | ||
84721d44 LR |
3504 | static int reg_set_rd_user(const struct ieee80211_regdomain *rd, |
3505 | struct regulatory_request *user_request) | |
3506 | { | |
3507 | const struct ieee80211_regdomain *intersected_rd = NULL; | |
3508 | ||
84721d44 LR |
3509 | if (!regdom_changes(rd->alpha2)) |
3510 | return -EALREADY; | |
3511 | ||
3512 | if (!is_valid_rd(rd)) { | |
94c4fd64 DY |
3513 | pr_err("Invalid regulatory domain detected: %c%c\n", |
3514 | rd->alpha2[0], rd->alpha2[1]); | |
84721d44 LR |
3515 | print_regdomain_info(rd); |
3516 | return -EINVAL; | |
3517 | } | |
3518 | ||
3519 | if (!user_request->intersect) { | |
3520 | reset_regdomains(false, rd); | |
3521 | return 0; | |
3522 | } | |
3523 | ||
3524 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); | |
3525 | if (!intersected_rd) | |
3526 | return -EINVAL; | |
3527 | ||
3528 | kfree(rd); | |
3529 | rd = NULL; | |
3530 | reset_regdomains(false, intersected_rd); | |
3531 | ||
3532 | return 0; | |
3533 | } | |
3534 | ||
f5fe3247 LR |
3535 | static int reg_set_rd_driver(const struct ieee80211_regdomain *rd, |
3536 | struct regulatory_request *driver_request) | |
b2e1b302 | 3537 | { |
e9763c3c | 3538 | const struct ieee80211_regdomain *regd; |
9c96477d | 3539 | const struct ieee80211_regdomain *intersected_rd = NULL; |
f5fe3247 | 3540 | const struct ieee80211_regdomain *tmp; |
806a9e39 | 3541 | struct wiphy *request_wiphy; |
6913b49a | 3542 | |
f5fe3247 | 3543 | if (is_world_regdom(rd->alpha2)) |
b2e1b302 LR |
3544 | return -EINVAL; |
3545 | ||
f5fe3247 LR |
3546 | if (!regdom_changes(rd->alpha2)) |
3547 | return -EALREADY; | |
b2e1b302 | 3548 | |
8375af3b | 3549 | if (!is_valid_rd(rd)) { |
94c4fd64 DY |
3550 | pr_err("Invalid regulatory domain detected: %c%c\n", |
3551 | rd->alpha2[0], rd->alpha2[1]); | |
8375af3b LR |
3552 | print_regdomain_info(rd); |
3553 | return -EINVAL; | |
b2e1b302 LR |
3554 | } |
3555 | ||
f5fe3247 | 3556 | request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx); |
922ec58c | 3557 | if (!request_wiphy) |
de3584bd | 3558 | return -ENODEV; |
806a9e39 | 3559 | |
f5fe3247 | 3560 | if (!driver_request->intersect) { |
558f6d32 LR |
3561 | if (request_wiphy->regd) |
3562 | return -EALREADY; | |
3e0c3ff3 | 3563 | |
e9763c3c JB |
3564 | regd = reg_copy_regd(rd); |
3565 | if (IS_ERR(regd)) | |
3566 | return PTR_ERR(regd); | |
3e0c3ff3 | 3567 | |
458f4f9e | 3568 | rcu_assign_pointer(request_wiphy->regd, regd); |
379b82f4 | 3569 | reset_regdomains(false, rd); |
b8295acd LR |
3570 | return 0; |
3571 | } | |
3572 | ||
f5fe3247 LR |
3573 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); |
3574 | if (!intersected_rd) | |
3575 | return -EINVAL; | |
b8295acd | 3576 | |
f5fe3247 LR |
3577 | /* |
3578 | * We can trash what CRDA provided now. | |
3579 | * However if a driver requested this specific regulatory | |
3580 | * domain we keep it for its private use | |
3581 | */ | |
3582 | tmp = get_wiphy_regdom(request_wiphy); | |
3583 | rcu_assign_pointer(request_wiphy->regd, rd); | |
3584 | rcu_free_regdom(tmp); | |
b8295acd | 3585 | |
f5fe3247 | 3586 | rd = NULL; |
b7566fc3 | 3587 | |
f5fe3247 | 3588 | reset_regdomains(false, intersected_rd); |
3e0c3ff3 | 3589 | |
f5fe3247 LR |
3590 | return 0; |
3591 | } | |
3592 | ||
01992406 LR |
3593 | static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd, |
3594 | struct regulatory_request *country_ie_request) | |
f5fe3247 LR |
3595 | { |
3596 | struct wiphy *request_wiphy; | |
b8295acd | 3597 | |
f5fe3247 LR |
3598 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && |
3599 | !is_unknown_alpha2(rd->alpha2)) | |
3600 | return -EINVAL; | |
b8295acd | 3601 | |
f5fe3247 LR |
3602 | /* |
3603 | * Lets only bother proceeding on the same alpha2 if the current | |
3604 | * rd is non static (it means CRDA was present and was used last) | |
3605 | * and the pending request came in from a country IE | |
3606 | */ | |
3607 | ||
3608 | if (!is_valid_rd(rd)) { | |
94c4fd64 DY |
3609 | pr_err("Invalid regulatory domain detected: %c%c\n", |
3610 | rd->alpha2[0], rd->alpha2[1]); | |
f5fe3247 LR |
3611 | print_regdomain_info(rd); |
3612 | return -EINVAL; | |
9c96477d LR |
3613 | } |
3614 | ||
01992406 | 3615 | request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx); |
922ec58c | 3616 | if (!request_wiphy) |
f5fe3247 | 3617 | return -ENODEV; |
b2e1b302 | 3618 | |
01992406 | 3619 | if (country_ie_request->intersect) |
f5fe3247 LR |
3620 | return -EINVAL; |
3621 | ||
3622 | reset_regdomains(false, rd); | |
3623 | return 0; | |
3624 | } | |
b2e1b302 | 3625 | |
fb1fc7ad LR |
3626 | /* |
3627 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 3628 | * multiple drivers can be ironed out later. Caller must've already |
458f4f9e | 3629 | * kmalloc'd the rd structure. |
fb1fc7ad | 3630 | */ |
c37722bd I |
3631 | int set_regdom(const struct ieee80211_regdomain *rd, |
3632 | enum ieee80211_regd_source regd_src) | |
b2e1b302 | 3633 | { |
c492db37 | 3634 | struct regulatory_request *lr; |
092008ab | 3635 | bool user_reset = false; |
b2e1b302 LR |
3636 | int r; |
3637 | ||
e646a025 JB |
3638 | if (IS_ERR_OR_NULL(rd)) |
3639 | return -ENODATA; | |
3640 | ||
3b9e5aca LR |
3641 | if (!reg_is_valid_request(rd->alpha2)) { |
3642 | kfree(rd); | |
3643 | return -EINVAL; | |
3644 | } | |
3645 | ||
c37722bd | 3646 | if (regd_src == REGD_SOURCE_CRDA) |
b6863036 | 3647 | reset_crda_timeouts(); |
c37722bd | 3648 | |
c492db37 | 3649 | lr = get_last_request(); |
abc7381b | 3650 | |
b2e1b302 | 3651 | /* Note that this doesn't update the wiphys, this is done below */ |
3b9e5aca LR |
3652 | switch (lr->initiator) { |
3653 | case NL80211_REGDOM_SET_BY_CORE: | |
3654 | r = reg_set_rd_core(rd); | |
3655 | break; | |
3656 | case NL80211_REGDOM_SET_BY_USER: | |
e646a025 | 3657 | cfg80211_save_user_regdom(rd); |
84721d44 | 3658 | r = reg_set_rd_user(rd, lr); |
092008ab | 3659 | user_reset = true; |
84721d44 | 3660 | break; |
3b9e5aca | 3661 | case NL80211_REGDOM_SET_BY_DRIVER: |
f5fe3247 LR |
3662 | r = reg_set_rd_driver(rd, lr); |
3663 | break; | |
3b9e5aca | 3664 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
01992406 | 3665 | r = reg_set_rd_country_ie(rd, lr); |
3b9e5aca LR |
3666 | break; |
3667 | default: | |
3668 | WARN(1, "invalid initiator %d\n", lr->initiator); | |
09d11800 | 3669 | kfree(rd); |
3b9e5aca LR |
3670 | return -EINVAL; |
3671 | } | |
3672 | ||
d2372b31 | 3673 | if (r) { |
092008ab JD |
3674 | switch (r) { |
3675 | case -EALREADY: | |
95908535 | 3676 | reg_set_request_processed(); |
092008ab JD |
3677 | break; |
3678 | default: | |
3679 | /* Back to world regulatory in case of errors */ | |
e646a025 | 3680 | restore_regulatory_settings(user_reset, false); |
092008ab | 3681 | } |
95908535 | 3682 | |
d2372b31 | 3683 | kfree(rd); |
38fd2143 | 3684 | return r; |
d2372b31 | 3685 | } |
b2e1b302 | 3686 | |
b2e1b302 | 3687 | /* This would make this whole thing pointless */ |
38fd2143 JB |
3688 | if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) |
3689 | return -EINVAL; | |
b2e1b302 LR |
3690 | |
3691 | /* update all wiphys now with the new established regulatory domain */ | |
c492db37 | 3692 | update_all_wiphy_regulatory(lr->initiator); |
b2e1b302 | 3693 | |
458f4f9e | 3694 | print_regdomain(get_cfg80211_regdom()); |
b2e1b302 | 3695 | |
c492db37 | 3696 | nl80211_send_reg_change_event(lr); |
73d54c9e | 3697 | |
b2e253cf LR |
3698 | reg_set_request_processed(); |
3699 | ||
38fd2143 | 3700 | return 0; |
b2e1b302 LR |
3701 | } |
3702 | ||
2c3e861c AN |
3703 | static int __regulatory_set_wiphy_regd(struct wiphy *wiphy, |
3704 | struct ieee80211_regdomain *rd) | |
b0d7aa59 JD |
3705 | { |
3706 | const struct ieee80211_regdomain *regd; | |
3707 | const struct ieee80211_regdomain *prev_regd; | |
3708 | struct cfg80211_registered_device *rdev; | |
3709 | ||
3710 | if (WARN_ON(!wiphy || !rd)) | |
3711 | return -EINVAL; | |
3712 | ||
3713 | if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED), | |
3714 | "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n")) | |
3715 | return -EPERM; | |
3716 | ||
3717 | if (WARN(!is_valid_rd(rd), "Invalid regulatory domain detected\n")) { | |
3718 | print_regdomain_info(rd); | |
3719 | return -EINVAL; | |
3720 | } | |
3721 | ||
3722 | regd = reg_copy_regd(rd); | |
3723 | if (IS_ERR(regd)) | |
3724 | return PTR_ERR(regd); | |
3725 | ||
3726 | rdev = wiphy_to_rdev(wiphy); | |
3727 | ||
3728 | spin_lock(®_requests_lock); | |
3729 | prev_regd = rdev->requested_regd; | |
3730 | rdev->requested_regd = regd; | |
3731 | spin_unlock(®_requests_lock); | |
3732 | ||
3733 | kfree(prev_regd); | |
2c3e861c AN |
3734 | return 0; |
3735 | } | |
3736 | ||
3737 | int regulatory_set_wiphy_regd(struct wiphy *wiphy, | |
3738 | struct ieee80211_regdomain *rd) | |
3739 | { | |
3740 | int ret = __regulatory_set_wiphy_regd(wiphy, rd); | |
3741 | ||
3742 | if (ret) | |
3743 | return ret; | |
b0d7aa59 JD |
3744 | |
3745 | schedule_work(®_work); | |
3746 | return 0; | |
3747 | } | |
3748 | EXPORT_SYMBOL(regulatory_set_wiphy_regd); | |
3749 | ||
2c3e861c AN |
3750 | int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy *wiphy, |
3751 | struct ieee80211_regdomain *rd) | |
3752 | { | |
3753 | int ret; | |
3754 | ||
3755 | ASSERT_RTNL(); | |
3756 | ||
3757 | ret = __regulatory_set_wiphy_regd(wiphy, rd); | |
3758 | if (ret) | |
3759 | return ret; | |
3760 | ||
3761 | /* process the request immediately */ | |
3762 | reg_process_self_managed_hints(); | |
3763 | return 0; | |
3764 | } | |
3765 | EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl); | |
3766 | ||
57b5ce07 LR |
3767 | void wiphy_regulatory_register(struct wiphy *wiphy) |
3768 | { | |
aced43ce | 3769 | struct regulatory_request *lr = get_last_request(); |
23df0b73 | 3770 | |
aced43ce AS |
3771 | /* self-managed devices ignore beacon hints and country IE */ |
3772 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) { | |
b0d7aa59 JD |
3773 | wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS | |
3774 | REGULATORY_COUNTRY_IE_IGNORE; | |
3775 | ||
aced43ce AS |
3776 | /* |
3777 | * The last request may have been received before this | |
3778 | * registration call. Call the driver notifier if | |
8772eed9 | 3779 | * initiator is USER. |
aced43ce | 3780 | */ |
8772eed9 | 3781 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER) |
aced43ce AS |
3782 | reg_call_notifier(wiphy, lr); |
3783 | } | |
3784 | ||
57b5ce07 LR |
3785 | if (!reg_dev_ignore_cell_hint(wiphy)) |
3786 | reg_num_devs_support_basehint++; | |
3787 | ||
23df0b73 | 3788 | wiphy_update_regulatory(wiphy, lr->initiator); |
89766727 | 3789 | wiphy_all_share_dfs_chan_state(wiphy); |
57b5ce07 LR |
3790 | } |
3791 | ||
bfead080 | 3792 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 3793 | { |
0ad8acaf | 3794 | struct wiphy *request_wiphy = NULL; |
c492db37 | 3795 | struct regulatory_request *lr; |
761cf7ec | 3796 | |
c492db37 | 3797 | lr = get_last_request(); |
abc7381b | 3798 | |
57b5ce07 LR |
3799 | if (!reg_dev_ignore_cell_hint(wiphy)) |
3800 | reg_num_devs_support_basehint--; | |
3801 | ||
458f4f9e | 3802 | rcu_free_regdom(get_wiphy_regdom(wiphy)); |
34dd886c | 3803 | RCU_INIT_POINTER(wiphy->regd, NULL); |
0ef9ccdd | 3804 | |
c492db37 JB |
3805 | if (lr) |
3806 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
806a9e39 | 3807 | |
0ef9ccdd | 3808 | if (!request_wiphy || request_wiphy != wiphy) |
38fd2143 | 3809 | return; |
0ef9ccdd | 3810 | |
c492db37 JB |
3811 | lr->wiphy_idx = WIPHY_IDX_INVALID; |
3812 | lr->country_ie_env = ENVIRON_ANY; | |
3f2355cb LR |
3813 | } |
3814 | ||
174e0cd2 | 3815 | /* |
f89769cf AS |
3816 | * See FCC notices for UNII band definitions |
3817 | * 5GHz: https://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii | |
3818 | * 6GHz: https://www.fcc.gov/document/fcc-proposes-more-spectrum-unlicensed-use-0 | |
174e0cd2 IP |
3819 | */ |
3820 | int cfg80211_get_unii(int freq) | |
3821 | { | |
3822 | /* UNII-1 */ | |
3823 | if (freq >= 5150 && freq <= 5250) | |
3824 | return 0; | |
3825 | ||
3826 | /* UNII-2A */ | |
3827 | if (freq > 5250 && freq <= 5350) | |
3828 | return 1; | |
3829 | ||
3830 | /* UNII-2B */ | |
3831 | if (freq > 5350 && freq <= 5470) | |
3832 | return 2; | |
3833 | ||
3834 | /* UNII-2C */ | |
3835 | if (freq > 5470 && freq <= 5725) | |
3836 | return 3; | |
3837 | ||
3838 | /* UNII-3 */ | |
3839 | if (freq > 5725 && freq <= 5825) | |
3840 | return 4; | |
3841 | ||
f89769cf AS |
3842 | /* UNII-5 */ |
3843 | if (freq > 5925 && freq <= 6425) | |
3844 | return 5; | |
3845 | ||
3846 | /* UNII-6 */ | |
3847 | if (freq > 6425 && freq <= 6525) | |
3848 | return 6; | |
3849 | ||
3850 | /* UNII-7 */ | |
3851 | if (freq > 6525 && freq <= 6875) | |
3852 | return 7; | |
3853 | ||
3854 | /* UNII-8 */ | |
3855 | if (freq > 6875 && freq <= 7125) | |
3856 | return 8; | |
3857 | ||
174e0cd2 IP |
3858 | return -EINVAL; |
3859 | } | |
3860 | ||
c8866e55 IP |
3861 | bool regulatory_indoor_allowed(void) |
3862 | { | |
3863 | return reg_is_indoor; | |
3864 | } | |
3865 | ||
b35a51c7 VT |
3866 | bool regulatory_pre_cac_allowed(struct wiphy *wiphy) |
3867 | { | |
3868 | const struct ieee80211_regdomain *regd = NULL; | |
3869 | const struct ieee80211_regdomain *wiphy_regd = NULL; | |
3870 | bool pre_cac_allowed = false; | |
3871 | ||
3872 | rcu_read_lock(); | |
3873 | ||
3874 | regd = rcu_dereference(cfg80211_regdomain); | |
3875 | wiphy_regd = rcu_dereference(wiphy->regd); | |
3876 | if (!wiphy_regd) { | |
3877 | if (regd->dfs_region == NL80211_DFS_ETSI) | |
3878 | pre_cac_allowed = true; | |
3879 | ||
3880 | rcu_read_unlock(); | |
3881 | ||
3882 | return pre_cac_allowed; | |
3883 | } | |
3884 | ||
3885 | if (regd->dfs_region == wiphy_regd->dfs_region && | |
3886 | wiphy_regd->dfs_region == NL80211_DFS_ETSI) | |
3887 | pre_cac_allowed = true; | |
3888 | ||
3889 | rcu_read_unlock(); | |
3890 | ||
3891 | return pre_cac_allowed; | |
3892 | } | |
dc0c18ed | 3893 | EXPORT_SYMBOL(regulatory_pre_cac_allowed); |
b35a51c7 | 3894 | |
26ec17a1 OM |
3895 | static void cfg80211_check_and_end_cac(struct cfg80211_registered_device *rdev) |
3896 | { | |
3897 | struct wireless_dev *wdev; | |
3898 | /* If we finished CAC or received radar, we should end any | |
3899 | * CAC running on the same channels. | |
3900 | * the check !cfg80211_chandef_dfs_usable contain 2 options: | |
3901 | * either all channels are available - those the CAC_FINISHED | |
3902 | * event has effected another wdev state, or there is a channel | |
3903 | * in unavailable state in wdev chandef - those the RADAR_DETECTED | |
3904 | * event has effected another wdev state. | |
3905 | * In both cases we should end the CAC on the wdev. | |
3906 | */ | |
3907 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { | |
3908 | if (wdev->cac_started && | |
3909 | !cfg80211_chandef_dfs_usable(&rdev->wiphy, &wdev->chandef)) | |
3910 | rdev_end_cac(rdev, wdev->netdev); | |
3911 | } | |
3912 | } | |
3913 | ||
89766727 VT |
3914 | void regulatory_propagate_dfs_state(struct wiphy *wiphy, |
3915 | struct cfg80211_chan_def *chandef, | |
3916 | enum nl80211_dfs_state dfs_state, | |
3917 | enum nl80211_radar_event event) | |
3918 | { | |
3919 | struct cfg80211_registered_device *rdev; | |
3920 | ||
3921 | ASSERT_RTNL(); | |
3922 | ||
3923 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
3924 | return; | |
3925 | ||
89766727 VT |
3926 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
3927 | if (wiphy == &rdev->wiphy) | |
3928 | continue; | |
3929 | ||
3930 | if (!reg_dfs_domain_same(wiphy, &rdev->wiphy)) | |
3931 | continue; | |
3932 | ||
3933 | if (!ieee80211_get_channel(&rdev->wiphy, | |
3934 | chandef->chan->center_freq)) | |
3935 | continue; | |
3936 | ||
3937 | cfg80211_set_dfs_state(&rdev->wiphy, chandef, dfs_state); | |
3938 | ||
3939 | if (event == NL80211_RADAR_DETECTED || | |
26ec17a1 | 3940 | event == NL80211_RADAR_CAC_FINISHED) { |
89766727 | 3941 | cfg80211_sched_dfs_chan_update(rdev); |
26ec17a1 OM |
3942 | cfg80211_check_and_end_cac(rdev); |
3943 | } | |
89766727 VT |
3944 | |
3945 | nl80211_radar_notify(rdev, chandef, event, NULL, GFP_KERNEL); | |
3946 | } | |
3947 | } | |
3948 | ||
d7be102f | 3949 | static int __init regulatory_init_db(void) |
b2e1b302 | 3950 | { |
d7be102f | 3951 | int err; |
734366de | 3952 | |
71e5e886 JB |
3953 | /* |
3954 | * It's possible that - due to other bugs/issues - cfg80211 | |
3955 | * never called regulatory_init() below, or that it failed; | |
3956 | * in that case, don't try to do any further work here as | |
3957 | * it's doomed to lead to crashes. | |
3958 | */ | |
3959 | if (IS_ERR_OR_NULL(reg_pdev)) | |
3960 | return -EINVAL; | |
3961 | ||
90a53e44 JB |
3962 | err = load_builtin_regdb_keys(); |
3963 | if (err) | |
3964 | return err; | |
3965 | ||
ae9e4b0d | 3966 | /* We always try to get an update for the static regdomain */ |
458f4f9e | 3967 | err = regulatory_hint_core(cfg80211_world_regdom->alpha2); |
ba25c141 | 3968 | if (err) { |
09d11800 OO |
3969 | if (err == -ENOMEM) { |
3970 | platform_device_unregister(reg_pdev); | |
bcf4f99b | 3971 | return err; |
09d11800 | 3972 | } |
bcf4f99b LR |
3973 | /* |
3974 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
3975 | * memory which is handled and propagated appropriately above | |
3976 | * but it can also fail during a netlink_broadcast() or during | |
3977 | * early boot for call_usermodehelper(). For now treat these | |
3978 | * errors as non-fatal. | |
3979 | */ | |
e9c0268f | 3980 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b | 3981 | } |
734366de | 3982 | |
ae9e4b0d LR |
3983 | /* |
3984 | * Finally, if the user set the module parameter treat it | |
3985 | * as a user hint. | |
3986 | */ | |
3987 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
3988 | regulatory_hint_user(ieee80211_regdom, |
3989 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 3990 | |
b2e1b302 LR |
3991 | return 0; |
3992 | } | |
d7be102f JB |
3993 | #ifndef MODULE |
3994 | late_initcall(regulatory_init_db); | |
3995 | #endif | |
3996 | ||
3997 | int __init regulatory_init(void) | |
3998 | { | |
3999 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); | |
4000 | if (IS_ERR(reg_pdev)) | |
4001 | return PTR_ERR(reg_pdev); | |
4002 | ||
4003 | spin_lock_init(®_requests_lock); | |
4004 | spin_lock_init(®_pending_beacons_lock); | |
4005 | spin_lock_init(®_indoor_lock); | |
4006 | ||
4007 | rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); | |
4008 | ||
4009 | user_alpha2[0] = '9'; | |
4010 | user_alpha2[1] = '7'; | |
4011 | ||
4012 | #ifdef MODULE | |
4013 | return regulatory_init_db(); | |
4014 | #else | |
4015 | return 0; | |
4016 | #endif | |
4017 | } | |
b2e1b302 | 4018 | |
1a919318 | 4019 | void regulatory_exit(void) |
b2e1b302 | 4020 | { |
fe33eb39 | 4021 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 4022 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
4023 | |
4024 | cancel_work_sync(®_work); | |
b6863036 | 4025 | cancel_crda_timeout_sync(); |
ad932f04 | 4026 | cancel_delayed_work_sync(®_check_chans); |
fe33eb39 | 4027 | |
9027b149 | 4028 | /* Lock to suppress warnings */ |
38fd2143 | 4029 | rtnl_lock(); |
379b82f4 | 4030 | reset_regdomains(true, NULL); |
38fd2143 | 4031 | rtnl_unlock(); |
734366de | 4032 | |
58ebacc6 | 4033 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 4034 | |
b2e1b302 | 4035 | platform_device_unregister(reg_pdev); |
734366de | 4036 | |
fea9bced JB |
4037 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
4038 | list_del(®_beacon->list); | |
4039 | kfree(reg_beacon); | |
e38f8a7a | 4040 | } |
e38f8a7a | 4041 | |
fea9bced JB |
4042 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
4043 | list_del(®_beacon->list); | |
4044 | kfree(reg_beacon); | |
e38f8a7a LR |
4045 | } |
4046 | ||
fea9bced JB |
4047 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
4048 | list_del(®_request->list); | |
4049 | kfree(reg_request); | |
fe33eb39 | 4050 | } |
007f6c5e JB |
4051 | |
4052 | if (!IS_ERR_OR_NULL(regdb)) | |
4053 | kfree(regdb); | |
e646a025 JB |
4054 | if (!IS_ERR_OR_NULL(cfg80211_user_regdom)) |
4055 | kfree(cfg80211_user_regdom); | |
90a53e44 JB |
4056 | |
4057 | free_regdb_keyring(); | |
8318d78a | 4058 | } |