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 |
230ebaa1 | 8 | * Copyright (C) 2018 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 | |
b6863036 | 134 | static void restore_regulatory_settings(bool reset_user); |
c37722bd | 135 | |
458f4f9e JB |
136 | static const struct ieee80211_regdomain *get_cfg80211_regdom(void) |
137 | { | |
5bf16a11 | 138 | return rcu_dereference_rtnl(cfg80211_regdomain); |
458f4f9e JB |
139 | } |
140 | ||
ad30ca2c | 141 | const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) |
458f4f9e | 142 | { |
5bf16a11 | 143 | return rcu_dereference_rtnl(wiphy->regd); |
458f4f9e JB |
144 | } |
145 | ||
3ef121b5 LR |
146 | static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region) |
147 | { | |
148 | switch (dfs_region) { | |
149 | case NL80211_DFS_UNSET: | |
150 | return "unset"; | |
151 | case NL80211_DFS_FCC: | |
152 | return "FCC"; | |
153 | case NL80211_DFS_ETSI: | |
154 | return "ETSI"; | |
155 | case NL80211_DFS_JP: | |
156 | return "JP"; | |
157 | } | |
158 | return "Unknown"; | |
159 | } | |
160 | ||
6c474799 LR |
161 | enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy) |
162 | { | |
163 | const struct ieee80211_regdomain *regd = NULL; | |
164 | const struct ieee80211_regdomain *wiphy_regd = NULL; | |
165 | ||
166 | regd = get_cfg80211_regdom(); | |
167 | if (!wiphy) | |
168 | goto out; | |
169 | ||
170 | wiphy_regd = get_wiphy_regdom(wiphy); | |
171 | if (!wiphy_regd) | |
172 | goto out; | |
173 | ||
174 | if (wiphy_regd->dfs_region == regd->dfs_region) | |
175 | goto out; | |
176 | ||
c799ba6e JB |
177 | pr_debug("%s: device specific dfs_region (%s) disagrees with cfg80211's central dfs_region (%s)\n", |
178 | dev_name(&wiphy->dev), | |
179 | reg_dfs_region_str(wiphy_regd->dfs_region), | |
180 | reg_dfs_region_str(regd->dfs_region)); | |
6c474799 LR |
181 | |
182 | out: | |
183 | return regd->dfs_region; | |
184 | } | |
185 | ||
458f4f9e JB |
186 | static void rcu_free_regdom(const struct ieee80211_regdomain *r) |
187 | { | |
188 | if (!r) | |
189 | return; | |
190 | kfree_rcu((struct ieee80211_regdomain *)r, rcu_head); | |
191 | } | |
192 | ||
c492db37 JB |
193 | static struct regulatory_request *get_last_request(void) |
194 | { | |
38fd2143 | 195 | return rcu_dereference_rtnl(last_request); |
c492db37 JB |
196 | } |
197 | ||
e38f8a7a | 198 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
199 | static LIST_HEAD(reg_requests_list); |
200 | static spinlock_t reg_requests_lock; | |
201 | ||
e38f8a7a LR |
202 | /* Used to queue up beacon hints for review */ |
203 | static LIST_HEAD(reg_pending_beacons); | |
204 | static spinlock_t reg_pending_beacons_lock; | |
205 | ||
206 | /* Used to keep track of processed beacon hints */ | |
207 | static LIST_HEAD(reg_beacon_list); | |
208 | ||
209 | struct reg_beacon { | |
210 | struct list_head list; | |
211 | struct ieee80211_channel chan; | |
212 | }; | |
213 | ||
ad932f04 AN |
214 | static void reg_check_chans_work(struct work_struct *work); |
215 | static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work); | |
216 | ||
f333a7a2 LR |
217 | static void reg_todo(struct work_struct *work); |
218 | static DECLARE_WORK(reg_work, reg_todo); | |
219 | ||
734366de JB |
220 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
221 | static const struct ieee80211_regdomain world_regdom = { | |
28981e5e | 222 | .n_reg_rules = 8, |
734366de JB |
223 | .alpha2 = "00", |
224 | .reg_rules = { | |
68798a62 LR |
225 | /* IEEE 802.11b/g, channels 1..11 */ |
226 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
43c771a1 | 227 | /* IEEE 802.11b/g, channels 12..13. */ |
c3826807 JB |
228 | REG_RULE(2467-10, 2472+10, 20, 6, 20, |
229 | NL80211_RRF_NO_IR | NL80211_RRF_AUTO_BW), | |
611b6a82 LR |
230 | /* IEEE 802.11 channel 14 - Only JP enables |
231 | * this and for 802.11b only */ | |
232 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
8fe02e16 | 233 | NL80211_RRF_NO_IR | |
611b6a82 LR |
234 | NL80211_RRF_NO_OFDM), |
235 | /* IEEE 802.11a, channel 36..48 */ | |
c3826807 JB |
236 | REG_RULE(5180-10, 5240+10, 80, 6, 20, |
237 | NL80211_RRF_NO_IR | | |
238 | NL80211_RRF_AUTO_BW), | |
3fc71f77 | 239 | |
131a19bc | 240 | /* IEEE 802.11a, channel 52..64 - DFS required */ |
c3826807 | 241 | REG_RULE(5260-10, 5320+10, 80, 6, 20, |
8fe02e16 | 242 | NL80211_RRF_NO_IR | |
c3826807 | 243 | NL80211_RRF_AUTO_BW | |
131a19bc JB |
244 | NL80211_RRF_DFS), |
245 | ||
246 | /* IEEE 802.11a, channel 100..144 - DFS required */ | |
247 | REG_RULE(5500-10, 5720+10, 160, 6, 20, | |
8fe02e16 | 248 | NL80211_RRF_NO_IR | |
131a19bc | 249 | NL80211_RRF_DFS), |
3fc71f77 LR |
250 | |
251 | /* IEEE 802.11a, channel 149..165 */ | |
8ab9d85c | 252 | REG_RULE(5745-10, 5825+10, 80, 6, 20, |
8fe02e16 | 253 | NL80211_RRF_NO_IR), |
90cdc6df | 254 | |
8047d261 | 255 | /* IEEE 802.11ad (60GHz), channels 1..3 */ |
90cdc6df | 256 | REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), |
734366de JB |
257 | } |
258 | }; | |
259 | ||
38fd2143 | 260 | /* protected by RTNL */ |
a3d2eaf0 JB |
261 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
262 | &world_regdom; | |
734366de | 263 | |
6ee7d330 | 264 | static char *ieee80211_regdom = "00"; |
09d989d1 | 265 | static char user_alpha2[2]; |
6ee7d330 | 266 | |
734366de JB |
267 | module_param(ieee80211_regdom, charp, 0444); |
268 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
269 | ||
c888393b | 270 | static void reg_free_request(struct regulatory_request *request) |
5ad6ef5e | 271 | { |
d34265a3 JB |
272 | if (request == &core_request_world) |
273 | return; | |
274 | ||
c888393b AN |
275 | if (request != get_last_request()) |
276 | kfree(request); | |
277 | } | |
278 | ||
279 | static void reg_free_last_request(void) | |
280 | { | |
281 | struct regulatory_request *lr = get_last_request(); | |
282 | ||
5ad6ef5e LR |
283 | if (lr != &core_request_world && lr) |
284 | kfree_rcu(lr, rcu_head); | |
285 | } | |
286 | ||
05f1a3ea LR |
287 | static void reg_update_last_request(struct regulatory_request *request) |
288 | { | |
255e25b0 LR |
289 | struct regulatory_request *lr; |
290 | ||
291 | lr = get_last_request(); | |
292 | if (lr == request) | |
293 | return; | |
294 | ||
c888393b | 295 | reg_free_last_request(); |
05f1a3ea LR |
296 | rcu_assign_pointer(last_request, request); |
297 | } | |
298 | ||
379b82f4 JB |
299 | static void reset_regdomains(bool full_reset, |
300 | const struct ieee80211_regdomain *new_regdom) | |
734366de | 301 | { |
458f4f9e JB |
302 | const struct ieee80211_regdomain *r; |
303 | ||
38fd2143 | 304 | ASSERT_RTNL(); |
e8da2bb4 | 305 | |
458f4f9e JB |
306 | r = get_cfg80211_regdom(); |
307 | ||
942b25cf | 308 | /* avoid freeing static information or freeing something twice */ |
458f4f9e JB |
309 | if (r == cfg80211_world_regdom) |
310 | r = NULL; | |
942b25cf JB |
311 | if (cfg80211_world_regdom == &world_regdom) |
312 | cfg80211_world_regdom = NULL; | |
458f4f9e JB |
313 | if (r == &world_regdom) |
314 | r = NULL; | |
942b25cf | 315 | |
458f4f9e JB |
316 | rcu_free_regdom(r); |
317 | rcu_free_regdom(cfg80211_world_regdom); | |
734366de | 318 | |
a3d2eaf0 | 319 | cfg80211_world_regdom = &world_regdom; |
458f4f9e | 320 | rcu_assign_pointer(cfg80211_regdomain, new_regdom); |
a042994d LR |
321 | |
322 | if (!full_reset) | |
323 | return; | |
324 | ||
05f1a3ea | 325 | reg_update_last_request(&core_request_world); |
734366de JB |
326 | } |
327 | ||
fb1fc7ad LR |
328 | /* |
329 | * Dynamic world regulatory domain requested by the wireless | |
330 | * core upon initialization | |
331 | */ | |
a3d2eaf0 | 332 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 333 | { |
c492db37 | 334 | struct regulatory_request *lr; |
734366de | 335 | |
c492db37 JB |
336 | lr = get_last_request(); |
337 | ||
338 | WARN_ON(!lr); | |
734366de | 339 | |
379b82f4 | 340 | reset_regdomains(false, rd); |
734366de JB |
341 | |
342 | cfg80211_world_regdom = rd; | |
734366de | 343 | } |
734366de | 344 | |
a3d2eaf0 | 345 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
346 | { |
347 | if (!alpha2) | |
348 | return false; | |
1a919318 | 349 | return alpha2[0] == '0' && alpha2[1] == '0'; |
b2e1b302 | 350 | } |
8318d78a | 351 | |
a3d2eaf0 | 352 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
353 | { |
354 | if (!alpha2) | |
355 | return false; | |
1a919318 | 356 | return alpha2[0] && alpha2[1]; |
b2e1b302 | 357 | } |
8318d78a | 358 | |
a3d2eaf0 | 359 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
360 | { |
361 | if (!alpha2) | |
362 | return false; | |
fb1fc7ad LR |
363 | /* |
364 | * Special case where regulatory domain was built by driver | |
365 | * but a specific alpha2 cannot be determined | |
366 | */ | |
1a919318 | 367 | return alpha2[0] == '9' && alpha2[1] == '9'; |
b2e1b302 | 368 | } |
8318d78a | 369 | |
3f2355cb LR |
370 | static bool is_intersected_alpha2(const char *alpha2) |
371 | { | |
372 | if (!alpha2) | |
373 | return false; | |
fb1fc7ad LR |
374 | /* |
375 | * Special case where regulatory domain is the | |
3f2355cb | 376 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
377 | * structures |
378 | */ | |
1a919318 | 379 | return alpha2[0] == '9' && alpha2[1] == '8'; |
3f2355cb LR |
380 | } |
381 | ||
a3d2eaf0 | 382 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
383 | { |
384 | if (!alpha2) | |
385 | return false; | |
1a919318 | 386 | return isalpha(alpha2[0]) && isalpha(alpha2[1]); |
b2e1b302 | 387 | } |
8318d78a | 388 | |
a3d2eaf0 | 389 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
390 | { |
391 | if (!alpha2_x || !alpha2_y) | |
392 | return false; | |
1a919318 | 393 | return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; |
b2e1b302 LR |
394 | } |
395 | ||
69b1572b | 396 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 397 | { |
458f4f9e | 398 | const struct ieee80211_regdomain *r = get_cfg80211_regdom(); |
761cf7ec | 399 | |
458f4f9e | 400 | if (!r) |
b2e1b302 | 401 | return true; |
458f4f9e | 402 | return !alpha2_equal(r->alpha2, alpha2); |
b2e1b302 LR |
403 | } |
404 | ||
09d989d1 LR |
405 | /* |
406 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
407 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
408 | * has ever been issued. | |
409 | */ | |
410 | static bool is_user_regdom_saved(void) | |
411 | { | |
412 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
413 | return false; | |
414 | ||
415 | /* This would indicate a mistake on the design */ | |
1a919318 | 416 | if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), |
09d989d1 | 417 | "Unexpected user alpha2: %c%c\n", |
1a919318 | 418 | user_alpha2[0], user_alpha2[1])) |
09d989d1 LR |
419 | return false; |
420 | ||
421 | return true; | |
422 | } | |
423 | ||
e9763c3c JB |
424 | static const struct ieee80211_regdomain * |
425 | reg_copy_regd(const struct ieee80211_regdomain *src_regd) | |
3b377ea9 JL |
426 | { |
427 | struct ieee80211_regdomain *regd; | |
38cb87ee | 428 | int size_of_regd; |
3b377ea9 JL |
429 | unsigned int i; |
430 | ||
82f20856 JB |
431 | size_of_regd = |
432 | sizeof(struct ieee80211_regdomain) + | |
433 | src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); | |
3b377ea9 | 434 | |
38cb87ee | 435 | regd = kzalloc(size_of_regd, GFP_KERNEL); |
3b377ea9 | 436 | if (!regd) |
e9763c3c | 437 | return ERR_PTR(-ENOMEM); |
3b377ea9 JL |
438 | |
439 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
440 | ||
38cb87ee | 441 | for (i = 0; i < src_regd->n_reg_rules; i++) |
3b377ea9 | 442 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], |
e9763c3c | 443 | sizeof(struct ieee80211_reg_rule)); |
3b377ea9 | 444 | |
e9763c3c | 445 | return regd; |
3b377ea9 JL |
446 | } |
447 | ||
c7d319e5 | 448 | struct reg_regdb_apply_request { |
3b377ea9 | 449 | struct list_head list; |
c7d319e5 | 450 | const struct ieee80211_regdomain *regdom; |
3b377ea9 JL |
451 | }; |
452 | ||
c7d319e5 JB |
453 | static LIST_HEAD(reg_regdb_apply_list); |
454 | static DEFINE_MUTEX(reg_regdb_apply_mutex); | |
3b377ea9 | 455 | |
c7d319e5 | 456 | static void reg_regdb_apply(struct work_struct *work) |
3b377ea9 | 457 | { |
c7d319e5 | 458 | struct reg_regdb_apply_request *request; |
a85d0d7f | 459 | |
5fe231e8 | 460 | rtnl_lock(); |
3b377ea9 | 461 | |
c7d319e5 JB |
462 | mutex_lock(®_regdb_apply_mutex); |
463 | while (!list_empty(®_regdb_apply_list)) { | |
464 | request = list_first_entry(®_regdb_apply_list, | |
465 | struct reg_regdb_apply_request, | |
3b377ea9 JL |
466 | list); |
467 | list_del(&request->list); | |
468 | ||
c7d319e5 | 469 | set_regdom(request->regdom, REGD_SOURCE_INTERNAL_DB); |
3b377ea9 JL |
470 | kfree(request); |
471 | } | |
c7d319e5 | 472 | mutex_unlock(®_regdb_apply_mutex); |
a85d0d7f | 473 | |
5fe231e8 | 474 | rtnl_unlock(); |
3b377ea9 JL |
475 | } |
476 | ||
c7d319e5 | 477 | static DECLARE_WORK(reg_regdb_work, reg_regdb_apply); |
3b377ea9 | 478 | |
007f6c5e | 479 | static int reg_schedule_apply(const struct ieee80211_regdomain *regdom) |
3b377ea9 | 480 | { |
c7d319e5 | 481 | struct reg_regdb_apply_request *request; |
3b377ea9 | 482 | |
c7d319e5 | 483 | request = kzalloc(sizeof(struct reg_regdb_apply_request), GFP_KERNEL); |
007f6c5e JB |
484 | if (!request) { |
485 | kfree(regdom); | |
c7d319e5 JB |
486 | return -ENOMEM; |
487 | } | |
3b377ea9 | 488 | |
007f6c5e JB |
489 | request->regdom = regdom; |
490 | ||
c7d319e5 JB |
491 | mutex_lock(®_regdb_apply_mutex); |
492 | list_add_tail(&request->list, ®_regdb_apply_list); | |
493 | mutex_unlock(®_regdb_apply_mutex); | |
3b377ea9 JL |
494 | |
495 | schedule_work(®_regdb_work); | |
c7d319e5 | 496 | return 0; |
3b377ea9 | 497 | } |
80007efe | 498 | |
b6863036 JB |
499 | #ifdef CONFIG_CFG80211_CRDA_SUPPORT |
500 | /* Max number of consecutive attempts to communicate with CRDA */ | |
501 | #define REG_MAX_CRDA_TIMEOUTS 10 | |
502 | ||
503 | static u32 reg_crda_timeouts; | |
504 | ||
505 | static void crda_timeout_work(struct work_struct *work); | |
506 | static DECLARE_DELAYED_WORK(crda_timeout, crda_timeout_work); | |
507 | ||
508 | static void crda_timeout_work(struct work_struct *work) | |
509 | { | |
c799ba6e | 510 | pr_debug("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); |
b6863036 JB |
511 | rtnl_lock(); |
512 | reg_crda_timeouts++; | |
513 | restore_regulatory_settings(true); | |
514 | rtnl_unlock(); | |
515 | } | |
516 | ||
517 | static void cancel_crda_timeout(void) | |
518 | { | |
519 | cancel_delayed_work(&crda_timeout); | |
520 | } | |
521 | ||
522 | static void cancel_crda_timeout_sync(void) | |
523 | { | |
524 | cancel_delayed_work_sync(&crda_timeout); | |
525 | } | |
526 | ||
527 | static void reset_crda_timeouts(void) | |
528 | { | |
529 | reg_crda_timeouts = 0; | |
530 | } | |
531 | ||
fb1fc7ad LR |
532 | /* |
533 | * This lets us keep regulatory code which is updated on a regulatory | |
1226d258 | 534 | * basis in userspace. |
fb1fc7ad | 535 | */ |
b2e1b302 LR |
536 | static int call_crda(const char *alpha2) |
537 | { | |
1226d258 JB |
538 | char country[12]; |
539 | char *env[] = { country, NULL }; | |
c7d319e5 | 540 | int ret; |
1226d258 JB |
541 | |
542 | snprintf(country, sizeof(country), "COUNTRY=%c%c", | |
543 | alpha2[0], alpha2[1]); | |
544 | ||
c37722bd | 545 | if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) { |
042ab5fc | 546 | pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n"); |
c37722bd I |
547 | return -EINVAL; |
548 | } | |
549 | ||
b2e1b302 | 550 | if (!is_world_regdom((char *) alpha2)) |
042ab5fc | 551 | pr_debug("Calling CRDA for country: %c%c\n", |
c799ba6e | 552 | alpha2[0], alpha2[1]); |
b2e1b302 | 553 | else |
042ab5fc | 554 | pr_debug("Calling CRDA to update world regulatory domain\n"); |
b2e1b302 | 555 | |
c7d319e5 JB |
556 | ret = kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env); |
557 | if (ret) | |
558 | return ret; | |
559 | ||
560 | queue_delayed_work(system_power_efficient_wq, | |
b6863036 | 561 | &crda_timeout, msecs_to_jiffies(3142)); |
c7d319e5 | 562 | return 0; |
b2e1b302 | 563 | } |
b6863036 JB |
564 | #else |
565 | static inline void cancel_crda_timeout(void) {} | |
566 | static inline void cancel_crda_timeout_sync(void) {} | |
567 | static inline void reset_crda_timeouts(void) {} | |
568 | static inline int call_crda(const char *alpha2) | |
569 | { | |
570 | return -ENODATA; | |
571 | } | |
572 | #endif /* CONFIG_CFG80211_CRDA_SUPPORT */ | |
b2e1b302 | 573 | |
007f6c5e JB |
574 | /* code to directly load a firmware database through request_firmware */ |
575 | static const struct fwdb_header *regdb; | |
576 | ||
577 | struct fwdb_country { | |
578 | u8 alpha2[2]; | |
579 | __be16 coll_ptr; | |
580 | /* this struct cannot be extended */ | |
581 | } __packed __aligned(4); | |
582 | ||
583 | struct fwdb_collection { | |
584 | u8 len; | |
585 | u8 n_rules; | |
586 | u8 dfs_region; | |
587 | /* no optional data yet */ | |
588 | /* aligned to 2, then followed by __be16 array of rule pointers */ | |
589 | } __packed __aligned(4); | |
590 | ||
591 | enum fwdb_flags { | |
592 | FWDB_FLAG_NO_OFDM = BIT(0), | |
593 | FWDB_FLAG_NO_OUTDOOR = BIT(1), | |
594 | FWDB_FLAG_DFS = BIT(2), | |
595 | FWDB_FLAG_NO_IR = BIT(3), | |
596 | FWDB_FLAG_AUTO_BW = BIT(4), | |
597 | }; | |
598 | ||
230ebaa1 HD |
599 | struct fwdb_wmm_ac { |
600 | u8 ecw; | |
601 | u8 aifsn; | |
602 | __be16 cot; | |
603 | } __packed; | |
604 | ||
605 | struct fwdb_wmm_rule { | |
606 | struct fwdb_wmm_ac client[IEEE80211_NUM_ACS]; | |
607 | struct fwdb_wmm_ac ap[IEEE80211_NUM_ACS]; | |
608 | } __packed; | |
609 | ||
007f6c5e JB |
610 | struct fwdb_rule { |
611 | u8 len; | |
612 | u8 flags; | |
613 | __be16 max_eirp; | |
614 | __be32 start, end, max_bw; | |
615 | /* start of optional data */ | |
616 | __be16 cac_timeout; | |
230ebaa1 | 617 | __be16 wmm_ptr; |
007f6c5e JB |
618 | } __packed __aligned(4); |
619 | ||
620 | #define FWDB_MAGIC 0x52474442 | |
621 | #define FWDB_VERSION 20 | |
622 | ||
623 | struct fwdb_header { | |
624 | __be32 magic; | |
625 | __be32 version; | |
626 | struct fwdb_country country[]; | |
627 | } __packed __aligned(4); | |
628 | ||
230ebaa1 HD |
629 | static int ecw2cw(int ecw) |
630 | { | |
631 | return (1 << ecw) - 1; | |
632 | } | |
633 | ||
634 | static bool valid_wmm(struct fwdb_wmm_rule *rule) | |
635 | { | |
636 | struct fwdb_wmm_ac *ac = (struct fwdb_wmm_ac *)rule; | |
637 | int i; | |
638 | ||
639 | for (i = 0; i < IEEE80211_NUM_ACS * 2; i++) { | |
640 | u16 cw_min = ecw2cw((ac[i].ecw & 0xf0) >> 4); | |
641 | u16 cw_max = ecw2cw(ac[i].ecw & 0x0f); | |
642 | u8 aifsn = ac[i].aifsn; | |
643 | ||
644 | if (cw_min >= cw_max) | |
645 | return false; | |
646 | ||
647 | if (aifsn < 1) | |
648 | return false; | |
649 | } | |
650 | ||
651 | return true; | |
652 | } | |
653 | ||
007f6c5e JB |
654 | static bool valid_rule(const u8 *data, unsigned int size, u16 rule_ptr) |
655 | { | |
656 | struct fwdb_rule *rule = (void *)(data + (rule_ptr << 2)); | |
657 | ||
658 | if ((u8 *)rule + sizeof(rule->len) > data + size) | |
659 | return false; | |
660 | ||
661 | /* mandatory fields */ | |
662 | if (rule->len < offsetofend(struct fwdb_rule, max_bw)) | |
663 | return false; | |
230ebaa1 HD |
664 | if (rule->len >= offsetofend(struct fwdb_rule, wmm_ptr)) { |
665 | u32 wmm_ptr = be16_to_cpu(rule->wmm_ptr) << 2; | |
666 | struct fwdb_wmm_rule *wmm; | |
667 | ||
668 | if (wmm_ptr + sizeof(struct fwdb_wmm_rule) > size) | |
669 | return false; | |
007f6c5e | 670 | |
230ebaa1 HD |
671 | wmm = (void *)(data + wmm_ptr); |
672 | ||
673 | if (!valid_wmm(wmm)) | |
674 | return false; | |
675 | } | |
007f6c5e JB |
676 | return true; |
677 | } | |
678 | ||
679 | static bool valid_country(const u8 *data, unsigned int size, | |
680 | const struct fwdb_country *country) | |
681 | { | |
682 | unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2; | |
683 | struct fwdb_collection *coll = (void *)(data + ptr); | |
684 | __be16 *rules_ptr; | |
685 | unsigned int i; | |
686 | ||
687 | /* make sure we can read len/n_rules */ | |
688 | if ((u8 *)coll + offsetofend(typeof(*coll), n_rules) > data + size) | |
689 | return false; | |
690 | ||
691 | /* make sure base struct and all rules fit */ | |
692 | if ((u8 *)coll + ALIGN(coll->len, 2) + | |
693 | (coll->n_rules * 2) > data + size) | |
694 | return false; | |
695 | ||
696 | /* mandatory fields must exist */ | |
697 | if (coll->len < offsetofend(struct fwdb_collection, dfs_region)) | |
698 | return false; | |
699 | ||
700 | rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2)); | |
701 | ||
702 | for (i = 0; i < coll->n_rules; i++) { | |
703 | u16 rule_ptr = be16_to_cpu(rules_ptr[i]); | |
704 | ||
705 | if (!valid_rule(data, size, rule_ptr)) | |
706 | return false; | |
707 | } | |
708 | ||
709 | return true; | |
710 | } | |
711 | ||
90a53e44 JB |
712 | #ifdef CONFIG_CFG80211_REQUIRE_SIGNED_REGDB |
713 | static struct key *builtin_regdb_keys; | |
714 | ||
715 | static void __init load_keys_from_buffer(const u8 *p, unsigned int buflen) | |
716 | { | |
717 | const u8 *end = p + buflen; | |
718 | size_t plen; | |
719 | key_ref_t key; | |
720 | ||
721 | while (p < end) { | |
722 | /* Each cert begins with an ASN.1 SEQUENCE tag and must be more | |
723 | * than 256 bytes in size. | |
724 | */ | |
725 | if (end - p < 4) | |
726 | goto dodgy_cert; | |
727 | if (p[0] != 0x30 && | |
728 | p[1] != 0x82) | |
729 | goto dodgy_cert; | |
730 | plen = (p[2] << 8) | p[3]; | |
731 | plen += 4; | |
732 | if (plen > end - p) | |
733 | goto dodgy_cert; | |
734 | ||
735 | key = key_create_or_update(make_key_ref(builtin_regdb_keys, 1), | |
736 | "asymmetric", NULL, p, plen, | |
737 | ((KEY_POS_ALL & ~KEY_POS_SETATTR) | | |
738 | KEY_USR_VIEW | KEY_USR_READ), | |
739 | KEY_ALLOC_NOT_IN_QUOTA | | |
740 | KEY_ALLOC_BUILT_IN | | |
741 | KEY_ALLOC_BYPASS_RESTRICTION); | |
742 | if (IS_ERR(key)) { | |
743 | pr_err("Problem loading in-kernel X.509 certificate (%ld)\n", | |
744 | PTR_ERR(key)); | |
745 | } else { | |
746 | pr_notice("Loaded X.509 cert '%s'\n", | |
747 | key_ref_to_ptr(key)->description); | |
748 | key_ref_put(key); | |
749 | } | |
750 | p += plen; | |
751 | } | |
752 | ||
753 | return; | |
754 | ||
755 | dodgy_cert: | |
756 | pr_err("Problem parsing in-kernel X.509 certificate list\n"); | |
757 | } | |
758 | ||
759 | static int __init load_builtin_regdb_keys(void) | |
760 | { | |
761 | builtin_regdb_keys = | |
762 | keyring_alloc(".builtin_regdb_keys", | |
763 | KUIDT_INIT(0), KGIDT_INIT(0), current_cred(), | |
764 | ((KEY_POS_ALL & ~KEY_POS_SETATTR) | | |
765 | KEY_USR_VIEW | KEY_USR_READ | KEY_USR_SEARCH), | |
766 | KEY_ALLOC_NOT_IN_QUOTA, NULL, NULL); | |
767 | if (IS_ERR(builtin_regdb_keys)) | |
768 | return PTR_ERR(builtin_regdb_keys); | |
769 | ||
770 | pr_notice("Loading compiled-in X.509 certificates for regulatory database\n"); | |
771 | ||
772 | #ifdef CONFIG_CFG80211_USE_KERNEL_REGDB_KEYS | |
773 | load_keys_from_buffer(shipped_regdb_certs, shipped_regdb_certs_len); | |
774 | #endif | |
88230ef1 | 775 | #ifdef CONFIG_CFG80211_EXTRA_REGDB_KEYDIR |
90a53e44 JB |
776 | if (CONFIG_CFG80211_EXTRA_REGDB_KEYDIR[0] != '\0') |
777 | load_keys_from_buffer(extra_regdb_certs, extra_regdb_certs_len); | |
778 | #endif | |
779 | ||
780 | return 0; | |
781 | } | |
782 | ||
783 | static bool regdb_has_valid_signature(const u8 *data, unsigned int size) | |
784 | { | |
785 | const struct firmware *sig; | |
786 | bool result; | |
787 | ||
788 | if (request_firmware(&sig, "regulatory.db.p7s", ®_pdev->dev)) | |
789 | return false; | |
790 | ||
791 | result = verify_pkcs7_signature(data, size, sig->data, sig->size, | |
792 | builtin_regdb_keys, | |
793 | VERIFYING_UNSPECIFIED_SIGNATURE, | |
794 | NULL, NULL) == 0; | |
795 | ||
796 | release_firmware(sig); | |
797 | ||
798 | return result; | |
799 | } | |
800 | ||
801 | static void free_regdb_keyring(void) | |
802 | { | |
803 | key_put(builtin_regdb_keys); | |
804 | } | |
805 | #else | |
806 | static int load_builtin_regdb_keys(void) | |
807 | { | |
808 | return 0; | |
809 | } | |
810 | ||
811 | static bool regdb_has_valid_signature(const u8 *data, unsigned int size) | |
812 | { | |
813 | return true; | |
814 | } | |
815 | ||
816 | static void free_regdb_keyring(void) | |
817 | { | |
818 | } | |
819 | #endif /* CONFIG_CFG80211_REQUIRE_SIGNED_REGDB */ | |
820 | ||
007f6c5e JB |
821 | static bool valid_regdb(const u8 *data, unsigned int size) |
822 | { | |
823 | const struct fwdb_header *hdr = (void *)data; | |
824 | const struct fwdb_country *country; | |
825 | ||
826 | if (size < sizeof(*hdr)) | |
827 | return false; | |
828 | ||
829 | if (hdr->magic != cpu_to_be32(FWDB_MAGIC)) | |
830 | return false; | |
831 | ||
832 | if (hdr->version != cpu_to_be32(FWDB_VERSION)) | |
833 | return false; | |
834 | ||
90a53e44 JB |
835 | if (!regdb_has_valid_signature(data, size)) |
836 | return false; | |
837 | ||
007f6c5e JB |
838 | country = &hdr->country[0]; |
839 | while ((u8 *)(country + 1) <= data + size) { | |
840 | if (!country->coll_ptr) | |
841 | break; | |
842 | if (!valid_country(data, size, country)) | |
843 | return false; | |
844 | country++; | |
845 | } | |
846 | ||
847 | return true; | |
848 | } | |
849 | ||
014f5a25 SG |
850 | static void set_wmm_rule(const struct fwdb_header *db, |
851 | const struct fwdb_country *country, | |
852 | const struct fwdb_rule *rule, | |
853 | struct ieee80211_reg_rule *rrule) | |
854 | { | |
855 | struct ieee80211_wmm_rule *wmm_rule = &rrule->wmm_rule; | |
856 | struct fwdb_wmm_rule *wmm; | |
857 | unsigned int i, wmm_ptr; | |
858 | ||
859 | wmm_ptr = be16_to_cpu(rule->wmm_ptr) << 2; | |
860 | wmm = (void *)((u8 *)db + wmm_ptr); | |
861 | ||
862 | if (!valid_wmm(wmm)) { | |
863 | pr_err("Invalid regulatory WMM rule %u-%u in domain %c%c\n", | |
864 | be32_to_cpu(rule->start), be32_to_cpu(rule->end), | |
865 | country->alpha2[0], country->alpha2[1]); | |
866 | return; | |
867 | } | |
230ebaa1 HD |
868 | |
869 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { | |
014f5a25 | 870 | wmm_rule->client[i].cw_min = |
230ebaa1 | 871 | ecw2cw((wmm->client[i].ecw & 0xf0) >> 4); |
014f5a25 SG |
872 | wmm_rule->client[i].cw_max = ecw2cw(wmm->client[i].ecw & 0x0f); |
873 | wmm_rule->client[i].aifsn = wmm->client[i].aifsn; | |
874 | wmm_rule->client[i].cot = | |
875 | 1000 * be16_to_cpu(wmm->client[i].cot); | |
876 | wmm_rule->ap[i].cw_min = ecw2cw((wmm->ap[i].ecw & 0xf0) >> 4); | |
877 | wmm_rule->ap[i].cw_max = ecw2cw(wmm->ap[i].ecw & 0x0f); | |
878 | wmm_rule->ap[i].aifsn = wmm->ap[i].aifsn; | |
879 | wmm_rule->ap[i].cot = 1000 * be16_to_cpu(wmm->ap[i].cot); | |
230ebaa1 | 880 | } |
38cb87ee SG |
881 | |
882 | rrule->has_wmm = true; | |
230ebaa1 HD |
883 | } |
884 | ||
19d3577e HD |
885 | static int __regdb_query_wmm(const struct fwdb_header *db, |
886 | const struct fwdb_country *country, int freq, | |
014f5a25 | 887 | struct ieee80211_reg_rule *rrule) |
19d3577e HD |
888 | { |
889 | unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2; | |
890 | struct fwdb_collection *coll = (void *)((u8 *)db + ptr); | |
891 | int i; | |
892 | ||
893 | for (i = 0; i < coll->n_rules; i++) { | |
894 | __be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2)); | |
895 | unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2; | |
014f5a25 | 896 | struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr); |
19d3577e | 897 | |
014f5a25 | 898 | if (rule->len < offsetofend(struct fwdb_rule, wmm_ptr)) |
19d3577e HD |
899 | continue; |
900 | ||
014f5a25 SG |
901 | if (freq >= KHZ_TO_MHZ(be32_to_cpu(rule->start)) && |
902 | freq <= KHZ_TO_MHZ(be32_to_cpu(rule->end))) { | |
903 | set_wmm_rule(db, country, rule, rrule); | |
19d3577e HD |
904 | return 0; |
905 | } | |
906 | } | |
907 | ||
908 | return -ENODATA; | |
909 | } | |
910 | ||
38cb87ee | 911 | int reg_query_regdb_wmm(char *alpha2, int freq, struct ieee80211_reg_rule *rule) |
19d3577e HD |
912 | { |
913 | const struct fwdb_header *hdr = regdb; | |
914 | const struct fwdb_country *country; | |
915 | ||
5247a77c HD |
916 | if (!regdb) |
917 | return -ENODATA; | |
918 | ||
19d3577e HD |
919 | if (IS_ERR(regdb)) |
920 | return PTR_ERR(regdb); | |
921 | ||
922 | country = &hdr->country[0]; | |
923 | while (country->coll_ptr) { | |
924 | if (alpha2_equal(alpha2, country->alpha2)) | |
38cb87ee | 925 | return __regdb_query_wmm(regdb, country, freq, rule); |
19d3577e HD |
926 | |
927 | country++; | |
928 | } | |
929 | ||
930 | return -ENODATA; | |
931 | } | |
932 | EXPORT_SYMBOL(reg_query_regdb_wmm); | |
933 | ||
007f6c5e JB |
934 | static int regdb_query_country(const struct fwdb_header *db, |
935 | const struct fwdb_country *country) | |
936 | { | |
937 | unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2; | |
938 | struct fwdb_collection *coll = (void *)((u8 *)db + ptr); | |
939 | struct ieee80211_regdomain *regdom; | |
38cb87ee | 940 | unsigned int size_of_regd, i; |
007f6c5e | 941 | |
230ebaa1 | 942 | size_of_regd = sizeof(struct ieee80211_regdomain) + |
007f6c5e JB |
943 | coll->n_rules * sizeof(struct ieee80211_reg_rule); |
944 | ||
945 | regdom = kzalloc(size_of_regd, GFP_KERNEL); | |
946 | if (!regdom) | |
947 | return -ENOMEM; | |
948 | ||
949 | regdom->n_reg_rules = coll->n_rules; | |
950 | regdom->alpha2[0] = country->alpha2[0]; | |
951 | regdom->alpha2[1] = country->alpha2[1]; | |
952 | regdom->dfs_region = coll->dfs_region; | |
953 | ||
954 | for (i = 0; i < regdom->n_reg_rules; i++) { | |
955 | __be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2)); | |
956 | unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2; | |
957 | struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr); | |
958 | struct ieee80211_reg_rule *rrule = ®dom->reg_rules[i]; | |
959 | ||
960 | rrule->freq_range.start_freq_khz = be32_to_cpu(rule->start); | |
961 | rrule->freq_range.end_freq_khz = be32_to_cpu(rule->end); | |
962 | rrule->freq_range.max_bandwidth_khz = be32_to_cpu(rule->max_bw); | |
963 | ||
964 | rrule->power_rule.max_antenna_gain = 0; | |
965 | rrule->power_rule.max_eirp = be16_to_cpu(rule->max_eirp); | |
966 | ||
967 | rrule->flags = 0; | |
968 | if (rule->flags & FWDB_FLAG_NO_OFDM) | |
969 | rrule->flags |= NL80211_RRF_NO_OFDM; | |
970 | if (rule->flags & FWDB_FLAG_NO_OUTDOOR) | |
971 | rrule->flags |= NL80211_RRF_NO_OUTDOOR; | |
972 | if (rule->flags & FWDB_FLAG_DFS) | |
973 | rrule->flags |= NL80211_RRF_DFS; | |
974 | if (rule->flags & FWDB_FLAG_NO_IR) | |
975 | rrule->flags |= NL80211_RRF_NO_IR; | |
976 | if (rule->flags & FWDB_FLAG_AUTO_BW) | |
977 | rrule->flags |= NL80211_RRF_AUTO_BW; | |
978 | ||
979 | rrule->dfs_cac_ms = 0; | |
980 | ||
981 | /* handle optional data */ | |
982 | if (rule->len >= offsetofend(struct fwdb_rule, cac_timeout)) | |
983 | rrule->dfs_cac_ms = | |
984 | 1000 * be16_to_cpu(rule->cac_timeout); | |
014f5a25 SG |
985 | if (rule->len >= offsetofend(struct fwdb_rule, wmm_ptr)) |
986 | set_wmm_rule(db, country, rule, rrule); | |
007f6c5e JB |
987 | } |
988 | ||
989 | return reg_schedule_apply(regdom); | |
990 | } | |
991 | ||
992 | static int query_regdb(const char *alpha2) | |
993 | { | |
994 | const struct fwdb_header *hdr = regdb; | |
995 | const struct fwdb_country *country; | |
996 | ||
1ea4ff3e JB |
997 | ASSERT_RTNL(); |
998 | ||
007f6c5e JB |
999 | if (IS_ERR(regdb)) |
1000 | return PTR_ERR(regdb); | |
1001 | ||
1002 | country = &hdr->country[0]; | |
1003 | while (country->coll_ptr) { | |
1004 | if (alpha2_equal(alpha2, country->alpha2)) | |
1005 | return regdb_query_country(regdb, country); | |
1006 | country++; | |
1007 | } | |
1008 | ||
1009 | return -ENODATA; | |
1010 | } | |
1011 | ||
1012 | static void regdb_fw_cb(const struct firmware *fw, void *context) | |
1013 | { | |
1ea4ff3e JB |
1014 | int set_error = 0; |
1015 | bool restore = true; | |
007f6c5e JB |
1016 | void *db; |
1017 | ||
1018 | if (!fw) { | |
1019 | pr_info("failed to load regulatory.db\n"); | |
1ea4ff3e JB |
1020 | set_error = -ENODATA; |
1021 | } else if (!valid_regdb(fw->data, fw->size)) { | |
90a53e44 | 1022 | pr_info("loaded regulatory.db is malformed or signature is missing/invalid\n"); |
1ea4ff3e | 1023 | set_error = -EINVAL; |
007f6c5e JB |
1024 | } |
1025 | ||
1ea4ff3e | 1026 | rtnl_lock(); |
faae54ad CT |
1027 | if (regdb && !IS_ERR(regdb)) { |
1028 | /* negative case - a bug | |
1029 | * positive case - can happen due to race in case of multiple cb's in | |
1030 | * queue, due to usage of asynchronous callback | |
1031 | * | |
1032 | * Either case, just restore and free new db. | |
1033 | */ | |
1ea4ff3e JB |
1034 | } else if (set_error) { |
1035 | regdb = ERR_PTR(set_error); | |
1036 | } else if (fw) { | |
1037 | db = kmemdup(fw->data, fw->size, GFP_KERNEL); | |
1038 | if (db) { | |
1039 | regdb = db; | |
1040 | restore = context && query_regdb(context); | |
1041 | } else { | |
1042 | restore = true; | |
1043 | } | |
007f6c5e JB |
1044 | } |
1045 | ||
1ea4ff3e JB |
1046 | if (restore) |
1047 | restore_regulatory_settings(true); | |
007f6c5e | 1048 | |
007f6c5e | 1049 | rtnl_unlock(); |
1ea4ff3e | 1050 | |
007f6c5e | 1051 | kfree(context); |
1ea4ff3e JB |
1052 | |
1053 | release_firmware(fw); | |
007f6c5e JB |
1054 | } |
1055 | ||
1056 | static int query_regdb_file(const char *alpha2) | |
1057 | { | |
1ea4ff3e JB |
1058 | ASSERT_RTNL(); |
1059 | ||
007f6c5e JB |
1060 | if (regdb) |
1061 | return query_regdb(alpha2); | |
1062 | ||
1063 | alpha2 = kmemdup(alpha2, 2, GFP_KERNEL); | |
1064 | if (!alpha2) | |
1065 | return -ENOMEM; | |
1066 | ||
1067 | return request_firmware_nowait(THIS_MODULE, true, "regulatory.db", | |
1068 | ®_pdev->dev, GFP_KERNEL, | |
1069 | (void *)alpha2, regdb_fw_cb); | |
1070 | } | |
1071 | ||
1ea4ff3e JB |
1072 | int reg_reload_regdb(void) |
1073 | { | |
1074 | const struct firmware *fw; | |
1075 | void *db; | |
1076 | int err; | |
1077 | ||
1078 | err = request_firmware(&fw, "regulatory.db", ®_pdev->dev); | |
1079 | if (err) | |
1080 | return err; | |
1081 | ||
1082 | if (!valid_regdb(fw->data, fw->size)) { | |
1083 | err = -ENODATA; | |
1084 | goto out; | |
1085 | } | |
1086 | ||
1087 | db = kmemdup(fw->data, fw->size, GFP_KERNEL); | |
1088 | if (!db) { | |
1089 | err = -ENOMEM; | |
1090 | goto out; | |
1091 | } | |
1092 | ||
1093 | rtnl_lock(); | |
1094 | if (!IS_ERR_OR_NULL(regdb)) | |
1095 | kfree(regdb); | |
1096 | regdb = db; | |
1097 | rtnl_unlock(); | |
1098 | ||
1099 | out: | |
1100 | release_firmware(fw); | |
1101 | return err; | |
1102 | } | |
1103 | ||
cecbb069 | 1104 | static bool reg_query_database(struct regulatory_request *request) |
fe6631ff | 1105 | { |
007f6c5e JB |
1106 | if (query_regdb_file(request->alpha2) == 0) |
1107 | return true; | |
1108 | ||
c7d319e5 JB |
1109 | if (call_crda(request->alpha2) == 0) |
1110 | return true; | |
1111 | ||
1112 | return false; | |
fe6631ff LR |
1113 | } |
1114 | ||
e438768f | 1115 | bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 1116 | { |
c492db37 | 1117 | struct regulatory_request *lr = get_last_request(); |
61405e97 | 1118 | |
c492db37 | 1119 | if (!lr || lr->processed) |
f6037d09 JB |
1120 | return false; |
1121 | ||
c492db37 | 1122 | return alpha2_equal(lr->alpha2, alpha2); |
b2e1b302 | 1123 | } |
8318d78a | 1124 | |
e3961af1 JD |
1125 | static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy) |
1126 | { | |
1127 | struct regulatory_request *lr = get_last_request(); | |
1128 | ||
1129 | /* | |
1130 | * Follow the driver's regulatory domain, if present, unless a country | |
1131 | * IE has been processed or a user wants to help complaince further | |
1132 | */ | |
1133 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
1134 | lr->initiator != NL80211_REGDOM_SET_BY_USER && | |
1135 | wiphy->regd) | |
1136 | return get_wiphy_regdom(wiphy); | |
1137 | ||
1138 | return get_cfg80211_regdom(); | |
1139 | } | |
1140 | ||
a6d4a534 AN |
1141 | static unsigned int |
1142 | reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd, | |
1143 | const struct ieee80211_reg_rule *rule) | |
97524820 JD |
1144 | { |
1145 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; | |
1146 | const struct ieee80211_freq_range *freq_range_tmp; | |
1147 | const struct ieee80211_reg_rule *tmp; | |
1148 | u32 start_freq, end_freq, idx, no; | |
1149 | ||
1150 | for (idx = 0; idx < rd->n_reg_rules; idx++) | |
1151 | if (rule == &rd->reg_rules[idx]) | |
1152 | break; | |
1153 | ||
1154 | if (idx == rd->n_reg_rules) | |
1155 | return 0; | |
1156 | ||
1157 | /* get start_freq */ | |
1158 | no = idx; | |
1159 | ||
1160 | while (no) { | |
1161 | tmp = &rd->reg_rules[--no]; | |
1162 | freq_range_tmp = &tmp->freq_range; | |
1163 | ||
1164 | if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz) | |
1165 | break; | |
1166 | ||
97524820 JD |
1167 | freq_range = freq_range_tmp; |
1168 | } | |
1169 | ||
1170 | start_freq = freq_range->start_freq_khz; | |
1171 | ||
1172 | /* get end_freq */ | |
1173 | freq_range = &rule->freq_range; | |
1174 | no = idx; | |
1175 | ||
1176 | while (no < rd->n_reg_rules - 1) { | |
1177 | tmp = &rd->reg_rules[++no]; | |
1178 | freq_range_tmp = &tmp->freq_range; | |
1179 | ||
1180 | if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz) | |
1181 | break; | |
1182 | ||
97524820 JD |
1183 | freq_range = freq_range_tmp; |
1184 | } | |
1185 | ||
1186 | end_freq = freq_range->end_freq_khz; | |
1187 | ||
1188 | return end_freq - start_freq; | |
1189 | } | |
1190 | ||
a6d4a534 AN |
1191 | unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd, |
1192 | const struct ieee80211_reg_rule *rule) | |
1193 | { | |
1194 | unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule); | |
1195 | ||
1196 | if (rule->flags & NL80211_RRF_NO_160MHZ) | |
1197 | bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80)); | |
1198 | if (rule->flags & NL80211_RRF_NO_80MHZ) | |
1199 | bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40)); | |
1200 | ||
1201 | /* | |
1202 | * HT40+/HT40- limits are handled per-channel. Only limit BW if both | |
1203 | * are not allowed. | |
1204 | */ | |
1205 | if (rule->flags & NL80211_RRF_NO_HT40MINUS && | |
1206 | rule->flags & NL80211_RRF_NO_HT40PLUS) | |
1207 | bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20)); | |
1208 | ||
1209 | return bw; | |
1210 | } | |
1211 | ||
b2e1b302 | 1212 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 1213 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 1214 | { |
a3d2eaf0 | 1215 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
1216 | u32 freq_diff; |
1217 | ||
91e99004 | 1218 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
1219 | return false; |
1220 | ||
1221 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
1222 | return false; | |
1223 | ||
1224 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
1225 | ||
bd05f28e | 1226 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
1a919318 | 1227 | freq_range->max_bandwidth_khz > freq_diff) |
b2e1b302 LR |
1228 | return false; |
1229 | ||
1230 | return true; | |
1231 | } | |
1232 | ||
a3d2eaf0 | 1233 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 1234 | { |
a3d2eaf0 | 1235 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 1236 | unsigned int i; |
8318d78a | 1237 | |
b2e1b302 LR |
1238 | if (!rd->n_reg_rules) |
1239 | return false; | |
8318d78a | 1240 | |
88dc1c3f LR |
1241 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
1242 | return false; | |
1243 | ||
b2e1b302 LR |
1244 | for (i = 0; i < rd->n_reg_rules; i++) { |
1245 | reg_rule = &rd->reg_rules[i]; | |
1246 | if (!is_valid_reg_rule(reg_rule)) | |
1247 | return false; | |
1248 | } | |
1249 | ||
1250 | return true; | |
8318d78a JB |
1251 | } |
1252 | ||
0c7dc45d LR |
1253 | /** |
1254 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
1255 | * @freq_range: frequency rule we want to query | |
1256 | * @freq_khz: frequency we are inquiring about | |
1257 | * | |
1258 | * This lets us know if a specific frequency rule is or is not relevant to | |
1259 | * a specific frequency's band. Bands are device specific and artificial | |
64629b9d VK |
1260 | * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), |
1261 | * however it is safe for now to assume that a frequency rule should not be | |
1262 | * part of a frequency's band if the start freq or end freq are off by more | |
1263 | * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the | |
1264 | * 60 GHz band. | |
0c7dc45d LR |
1265 | * This resolution can be lowered and should be considered as we add |
1266 | * regulatory rule support for other "bands". | |
1267 | **/ | |
1268 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
1a919318 | 1269 | u32 freq_khz) |
0c7dc45d LR |
1270 | { |
1271 | #define ONE_GHZ_IN_KHZ 1000000 | |
64629b9d VK |
1272 | /* |
1273 | * From 802.11ad: directional multi-gigabit (DMG): | |
1274 | * Pertaining to operation in a frequency band containing a channel | |
1275 | * with the Channel starting frequency above 45 GHz. | |
1276 | */ | |
1277 | u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? | |
1278 | 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; | |
1279 | if (abs(freq_khz - freq_range->start_freq_khz) <= limit) | |
0c7dc45d | 1280 | return true; |
64629b9d | 1281 | if (abs(freq_khz - freq_range->end_freq_khz) <= limit) |
0c7dc45d LR |
1282 | return true; |
1283 | return false; | |
1284 | #undef ONE_GHZ_IN_KHZ | |
1285 | } | |
1286 | ||
adbfb058 LR |
1287 | /* |
1288 | * Later on we can perhaps use the more restrictive DFS | |
1289 | * region but we don't have information for that yet so | |
1290 | * for now simply disallow conflicts. | |
1291 | */ | |
1292 | static enum nl80211_dfs_regions | |
1293 | reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1, | |
1294 | const enum nl80211_dfs_regions dfs_region2) | |
1295 | { | |
1296 | if (dfs_region1 != dfs_region2) | |
1297 | return NL80211_DFS_UNSET; | |
1298 | return dfs_region1; | |
1299 | } | |
1300 | ||
fb1fc7ad LR |
1301 | /* |
1302 | * Helper for regdom_intersect(), this does the real | |
1303 | * mathematical intersection fun | |
1304 | */ | |
97524820 JD |
1305 | static int reg_rules_intersect(const struct ieee80211_regdomain *rd1, |
1306 | const struct ieee80211_regdomain *rd2, | |
1307 | const struct ieee80211_reg_rule *rule1, | |
1a919318 JB |
1308 | const struct ieee80211_reg_rule *rule2, |
1309 | struct ieee80211_reg_rule *intersected_rule) | |
9c96477d LR |
1310 | { |
1311 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
1312 | struct ieee80211_freq_range *freq_range; | |
1313 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
1314 | struct ieee80211_power_rule *power_rule; | |
97524820 | 1315 | u32 freq_diff, max_bandwidth1, max_bandwidth2; |
9c96477d LR |
1316 | |
1317 | freq_range1 = &rule1->freq_range; | |
1318 | freq_range2 = &rule2->freq_range; | |
1319 | freq_range = &intersected_rule->freq_range; | |
1320 | ||
1321 | power_rule1 = &rule1->power_rule; | |
1322 | power_rule2 = &rule2->power_rule; | |
1323 | power_rule = &intersected_rule->power_rule; | |
1324 | ||
1325 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
1a919318 | 1326 | freq_range2->start_freq_khz); |
9c96477d | 1327 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
1a919318 | 1328 | freq_range2->end_freq_khz); |
97524820 JD |
1329 | |
1330 | max_bandwidth1 = freq_range1->max_bandwidth_khz; | |
1331 | max_bandwidth2 = freq_range2->max_bandwidth_khz; | |
1332 | ||
b0dfd2ea JD |
1333 | if (rule1->flags & NL80211_RRF_AUTO_BW) |
1334 | max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1); | |
1335 | if (rule2->flags & NL80211_RRF_AUTO_BW) | |
1336 | max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2); | |
97524820 JD |
1337 | |
1338 | freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2); | |
9c96477d | 1339 | |
b0dfd2ea JD |
1340 | intersected_rule->flags = rule1->flags | rule2->flags; |
1341 | ||
1342 | /* | |
1343 | * In case NL80211_RRF_AUTO_BW requested for both rules | |
1344 | * set AUTO_BW in intersected rule also. Next we will | |
1345 | * calculate BW correctly in handle_channel function. | |
1346 | * In other case remove AUTO_BW flag while we calculate | |
1347 | * maximum bandwidth correctly and auto calculation is | |
1348 | * not required. | |
1349 | */ | |
1350 | if ((rule1->flags & NL80211_RRF_AUTO_BW) && | |
1351 | (rule2->flags & NL80211_RRF_AUTO_BW)) | |
1352 | intersected_rule->flags |= NL80211_RRF_AUTO_BW; | |
1353 | else | |
1354 | intersected_rule->flags &= ~NL80211_RRF_AUTO_BW; | |
1355 | ||
9c96477d LR |
1356 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; |
1357 | if (freq_range->max_bandwidth_khz > freq_diff) | |
1358 | freq_range->max_bandwidth_khz = freq_diff; | |
1359 | ||
1360 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
1361 | power_rule2->max_eirp); | |
1362 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
1363 | power_rule2->max_antenna_gain); | |
1364 | ||
089027e5 JD |
1365 | intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms, |
1366 | rule2->dfs_cac_ms); | |
1367 | ||
9c96477d LR |
1368 | if (!is_valid_reg_rule(intersected_rule)) |
1369 | return -EINVAL; | |
1370 | ||
1371 | return 0; | |
1372 | } | |
1373 | ||
a62a1aed EP |
1374 | /* check whether old rule contains new rule */ |
1375 | static bool rule_contains(struct ieee80211_reg_rule *r1, | |
1376 | struct ieee80211_reg_rule *r2) | |
1377 | { | |
1378 | /* for simplicity, currently consider only same flags */ | |
1379 | if (r1->flags != r2->flags) | |
1380 | return false; | |
1381 | ||
1382 | /* verify r1 is more restrictive */ | |
1383 | if ((r1->power_rule.max_antenna_gain > | |
1384 | r2->power_rule.max_antenna_gain) || | |
1385 | r1->power_rule.max_eirp > r2->power_rule.max_eirp) | |
1386 | return false; | |
1387 | ||
1388 | /* make sure r2's range is contained within r1 */ | |
1389 | if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz || | |
1390 | r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz) | |
1391 | return false; | |
1392 | ||
1393 | /* and finally verify that r1.max_bw >= r2.max_bw */ | |
1394 | if (r1->freq_range.max_bandwidth_khz < | |
1395 | r2->freq_range.max_bandwidth_khz) | |
1396 | return false; | |
1397 | ||
1398 | return true; | |
1399 | } | |
1400 | ||
1401 | /* add or extend current rules. do nothing if rule is already contained */ | |
1402 | static void add_rule(struct ieee80211_reg_rule *rule, | |
1403 | struct ieee80211_reg_rule *reg_rules, u32 *n_rules) | |
1404 | { | |
1405 | struct ieee80211_reg_rule *tmp_rule; | |
1406 | int i; | |
1407 | ||
1408 | for (i = 0; i < *n_rules; i++) { | |
1409 | tmp_rule = ®_rules[i]; | |
1410 | /* rule is already contained - do nothing */ | |
1411 | if (rule_contains(tmp_rule, rule)) | |
1412 | return; | |
1413 | ||
1414 | /* extend rule if possible */ | |
1415 | if (rule_contains(rule, tmp_rule)) { | |
1416 | memcpy(tmp_rule, rule, sizeof(*rule)); | |
1417 | return; | |
1418 | } | |
1419 | } | |
1420 | ||
1421 | memcpy(®_rules[*n_rules], rule, sizeof(*rule)); | |
1422 | (*n_rules)++; | |
1423 | } | |
1424 | ||
9c96477d LR |
1425 | /** |
1426 | * regdom_intersect - do the intersection between two regulatory domains | |
1427 | * @rd1: first regulatory domain | |
1428 | * @rd2: second regulatory domain | |
1429 | * | |
1430 | * Use this function to get the intersection between two regulatory domains. | |
1431 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
1432 | * as no one single alpha2 can represent this regulatory domain. | |
1433 | * | |
1434 | * Returns a pointer to the regulatory domain structure which will hold the | |
1435 | * resulting intersection of rules between rd1 and rd2. We will | |
1436 | * kzalloc() this structure for you. | |
1437 | */ | |
1a919318 JB |
1438 | static struct ieee80211_regdomain * |
1439 | regdom_intersect(const struct ieee80211_regdomain *rd1, | |
1440 | const struct ieee80211_regdomain *rd2) | |
9c96477d LR |
1441 | { |
1442 | int r, size_of_regd; | |
1443 | unsigned int x, y; | |
a62a1aed | 1444 | unsigned int num_rules = 0; |
9c96477d | 1445 | const struct ieee80211_reg_rule *rule1, *rule2; |
a62a1aed | 1446 | struct ieee80211_reg_rule intersected_rule; |
9c96477d | 1447 | struct ieee80211_regdomain *rd; |
9c96477d LR |
1448 | |
1449 | if (!rd1 || !rd2) | |
1450 | return NULL; | |
1451 | ||
fb1fc7ad LR |
1452 | /* |
1453 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
1454 | * build them. This is to so we can malloc() and free() a |
1455 | * regdomain once. The reason we use reg_rules_intersect() here | |
1456 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
1457 | * All rules that do check out OK are valid. |
1458 | */ | |
9c96477d LR |
1459 | |
1460 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
1461 | rule1 = &rd1->reg_rules[x]; | |
1462 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
1463 | rule2 = &rd2->reg_rules[y]; | |
97524820 | 1464 | if (!reg_rules_intersect(rd1, rd2, rule1, rule2, |
a62a1aed | 1465 | &intersected_rule)) |
9c96477d | 1466 | num_rules++; |
9c96477d LR |
1467 | } |
1468 | } | |
1469 | ||
1470 | if (!num_rules) | |
1471 | return NULL; | |
1472 | ||
1473 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
82f20856 | 1474 | num_rules * sizeof(struct ieee80211_reg_rule); |
9c96477d LR |
1475 | |
1476 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
1477 | if (!rd) | |
1478 | return NULL; | |
1479 | ||
a62a1aed | 1480 | for (x = 0; x < rd1->n_reg_rules; x++) { |
9c96477d | 1481 | rule1 = &rd1->reg_rules[x]; |
a62a1aed | 1482 | for (y = 0; y < rd2->n_reg_rules; y++) { |
9c96477d | 1483 | rule2 = &rd2->reg_rules[y]; |
97524820 | 1484 | r = reg_rules_intersect(rd1, rd2, rule1, rule2, |
a62a1aed | 1485 | &intersected_rule); |
fb1fc7ad LR |
1486 | /* |
1487 | * No need to memset here the intersected rule here as | |
1488 | * we're not using the stack anymore | |
1489 | */ | |
9c96477d LR |
1490 | if (r) |
1491 | continue; | |
9c96477d | 1492 | |
a62a1aed EP |
1493 | add_rule(&intersected_rule, rd->reg_rules, |
1494 | &rd->n_reg_rules); | |
1495 | } | |
9c96477d LR |
1496 | } |
1497 | ||
9c96477d LR |
1498 | rd->alpha2[0] = '9'; |
1499 | rd->alpha2[1] = '8'; | |
adbfb058 LR |
1500 | rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region, |
1501 | rd2->dfs_region); | |
9c96477d LR |
1502 | |
1503 | return rd; | |
1504 | } | |
1505 | ||
fb1fc7ad LR |
1506 | /* |
1507 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
1508 | * want to just have the channel structure use these | |
1509 | */ | |
b2e1b302 LR |
1510 | static u32 map_regdom_flags(u32 rd_flags) |
1511 | { | |
1512 | u32 channel_flags = 0; | |
8fe02e16 LR |
1513 | if (rd_flags & NL80211_RRF_NO_IR_ALL) |
1514 | channel_flags |= IEEE80211_CHAN_NO_IR; | |
b2e1b302 LR |
1515 | if (rd_flags & NL80211_RRF_DFS) |
1516 | channel_flags |= IEEE80211_CHAN_RADAR; | |
03f6b084 SF |
1517 | if (rd_flags & NL80211_RRF_NO_OFDM) |
1518 | channel_flags |= IEEE80211_CHAN_NO_OFDM; | |
570dbde1 DS |
1519 | if (rd_flags & NL80211_RRF_NO_OUTDOOR) |
1520 | channel_flags |= IEEE80211_CHAN_INDOOR_ONLY; | |
06f207fc AN |
1521 | if (rd_flags & NL80211_RRF_IR_CONCURRENT) |
1522 | channel_flags |= IEEE80211_CHAN_IR_CONCURRENT; | |
a6d4a534 AN |
1523 | if (rd_flags & NL80211_RRF_NO_HT40MINUS) |
1524 | channel_flags |= IEEE80211_CHAN_NO_HT40MINUS; | |
1525 | if (rd_flags & NL80211_RRF_NO_HT40PLUS) | |
1526 | channel_flags |= IEEE80211_CHAN_NO_HT40PLUS; | |
1527 | if (rd_flags & NL80211_RRF_NO_80MHZ) | |
1528 | channel_flags |= IEEE80211_CHAN_NO_80MHZ; | |
1529 | if (rd_flags & NL80211_RRF_NO_160MHZ) | |
1530 | channel_flags |= IEEE80211_CHAN_NO_160MHZ; | |
b2e1b302 LR |
1531 | return channel_flags; |
1532 | } | |
1533 | ||
361c9c8b | 1534 | static const struct ieee80211_reg_rule * |
49172874 | 1535 | freq_reg_info_regd(u32 center_freq, |
4edd5698 | 1536 | const struct ieee80211_regdomain *regd, u32 bw) |
8318d78a JB |
1537 | { |
1538 | int i; | |
0c7dc45d | 1539 | bool band_rule_found = false; |
038659e7 LR |
1540 | bool bw_fits = false; |
1541 | ||
3e0c3ff3 | 1542 | if (!regd) |
361c9c8b | 1543 | return ERR_PTR(-EINVAL); |
b2e1b302 | 1544 | |
3e0c3ff3 | 1545 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
1546 | const struct ieee80211_reg_rule *rr; |
1547 | const struct ieee80211_freq_range *fr = NULL; | |
b2e1b302 | 1548 | |
3e0c3ff3 | 1549 | rr = ®d->reg_rules[i]; |
b2e1b302 | 1550 | fr = &rr->freq_range; |
0c7dc45d | 1551 | |
fb1fc7ad LR |
1552 | /* |
1553 | * We only need to know if one frequency rule was | |
0c7dc45d | 1554 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
1555 | * not overwrite it once found |
1556 | */ | |
0c7dc45d LR |
1557 | if (!band_rule_found) |
1558 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
1559 | ||
4787cfa0 | 1560 | bw_fits = cfg80211_does_bw_fit_range(fr, center_freq, bw); |
0c7dc45d | 1561 | |
361c9c8b JB |
1562 | if (band_rule_found && bw_fits) |
1563 | return rr; | |
8318d78a JB |
1564 | } |
1565 | ||
0c7dc45d | 1566 | if (!band_rule_found) |
361c9c8b | 1567 | return ERR_PTR(-ERANGE); |
0c7dc45d | 1568 | |
361c9c8b | 1569 | return ERR_PTR(-EINVAL); |
b2e1b302 LR |
1570 | } |
1571 | ||
8de1c63b JB |
1572 | static const struct ieee80211_reg_rule * |
1573 | __freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw) | |
1fa25e41 | 1574 | { |
4edd5698 MM |
1575 | const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy); |
1576 | const struct ieee80211_reg_rule *reg_rule = NULL; | |
1577 | u32 bw; | |
1a919318 | 1578 | |
4edd5698 | 1579 | for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) { |
49172874 | 1580 | reg_rule = freq_reg_info_regd(center_freq, regd, bw); |
4edd5698 MM |
1581 | if (!IS_ERR(reg_rule)) |
1582 | return reg_rule; | |
1583 | } | |
5d885b99 | 1584 | |
4edd5698 MM |
1585 | return reg_rule; |
1586 | } | |
1587 | ||
1588 | const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, | |
1589 | u32 center_freq) | |
1590 | { | |
1591 | return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(20)); | |
1fa25e41 | 1592 | } |
4f366c5d | 1593 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 1594 | |
034c6d6e | 1595 | const char *reg_initiator_name(enum nl80211_reg_initiator initiator) |
926a0a09 LR |
1596 | { |
1597 | switch (initiator) { | |
1598 | case NL80211_REGDOM_SET_BY_CORE: | |
034c6d6e | 1599 | return "core"; |
926a0a09 | 1600 | case NL80211_REGDOM_SET_BY_USER: |
034c6d6e | 1601 | return "user"; |
926a0a09 | 1602 | case NL80211_REGDOM_SET_BY_DRIVER: |
034c6d6e | 1603 | return "driver"; |
926a0a09 | 1604 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
8db0c433 | 1605 | return "country element"; |
926a0a09 LR |
1606 | default: |
1607 | WARN_ON(1); | |
034c6d6e | 1608 | return "bug"; |
926a0a09 LR |
1609 | } |
1610 | } | |
034c6d6e | 1611 | EXPORT_SYMBOL(reg_initiator_name); |
e702d3cf | 1612 | |
1aeb135f MS |
1613 | static uint32_t reg_rule_to_chan_bw_flags(const struct ieee80211_regdomain *regd, |
1614 | const struct ieee80211_reg_rule *reg_rule, | |
1615 | const struct ieee80211_channel *chan) | |
1616 | { | |
1617 | const struct ieee80211_freq_range *freq_range = NULL; | |
1618 | u32 max_bandwidth_khz, bw_flags = 0; | |
1619 | ||
1620 | freq_range = ®_rule->freq_range; | |
1621 | ||
1622 | max_bandwidth_khz = freq_range->max_bandwidth_khz; | |
1623 | /* Check if auto calculation requested */ | |
1624 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) | |
1625 | max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); | |
1626 | ||
1627 | /* If we get a reg_rule we can assume that at least 5Mhz fit */ | |
4787cfa0 RM |
1628 | if (!cfg80211_does_bw_fit_range(freq_range, |
1629 | MHZ_TO_KHZ(chan->center_freq), | |
1630 | MHZ_TO_KHZ(10))) | |
1aeb135f | 1631 | bw_flags |= IEEE80211_CHAN_NO_10MHZ; |
4787cfa0 RM |
1632 | if (!cfg80211_does_bw_fit_range(freq_range, |
1633 | MHZ_TO_KHZ(chan->center_freq), | |
1634 | MHZ_TO_KHZ(20))) | |
1aeb135f MS |
1635 | bw_flags |= IEEE80211_CHAN_NO_20MHZ; |
1636 | ||
1637 | if (max_bandwidth_khz < MHZ_TO_KHZ(10)) | |
1638 | bw_flags |= IEEE80211_CHAN_NO_10MHZ; | |
1639 | if (max_bandwidth_khz < MHZ_TO_KHZ(20)) | |
1640 | bw_flags |= IEEE80211_CHAN_NO_20MHZ; | |
1641 | if (max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
1642 | bw_flags |= IEEE80211_CHAN_NO_HT40; | |
1643 | if (max_bandwidth_khz < MHZ_TO_KHZ(80)) | |
1644 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; | |
1645 | if (max_bandwidth_khz < MHZ_TO_KHZ(160)) | |
1646 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; | |
1647 | return bw_flags; | |
1648 | } | |
1649 | ||
e33e2241 JB |
1650 | /* |
1651 | * Note that right now we assume the desired channel bandwidth | |
1652 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
1653 | * per channel, the primary and the extension channel). | |
038659e7 | 1654 | */ |
7ca43d03 LR |
1655 | static void handle_channel(struct wiphy *wiphy, |
1656 | enum nl80211_reg_initiator initiator, | |
fdc9d7b2 | 1657 | struct ieee80211_channel *chan) |
b2e1b302 | 1658 | { |
038659e7 | 1659 | u32 flags, bw_flags = 0; |
b2e1b302 LR |
1660 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1661 | const struct ieee80211_power_rule *power_rule = NULL; | |
fe33eb39 | 1662 | struct wiphy *request_wiphy = NULL; |
c492db37 | 1663 | struct regulatory_request *lr = get_last_request(); |
97524820 | 1664 | const struct ieee80211_regdomain *regd; |
a92a3ce7 | 1665 | |
c492db37 | 1666 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
a92a3ce7 LR |
1667 | |
1668 | flags = chan->orig_flags; | |
b2e1b302 | 1669 | |
361c9c8b JB |
1670 | reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); |
1671 | if (IS_ERR(reg_rule)) { | |
ca4ffe8f LR |
1672 | /* |
1673 | * We will disable all channels that do not match our | |
25985edc | 1674 | * received regulatory rule unless the hint is coming |
ca4ffe8f LR |
1675 | * from a Country IE and the Country IE had no information |
1676 | * about a band. The IEEE 802.11 spec allows for an AP | |
1677 | * to send only a subset of the regulatory rules allowed, | |
1678 | * so an AP in the US that only supports 2.4 GHz may only send | |
1679 | * a country IE with information for the 2.4 GHz band | |
1680 | * while 5 GHz is still supported. | |
1681 | */ | |
1682 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
361c9c8b | 1683 | PTR_ERR(reg_rule) == -ERANGE) |
ca4ffe8f LR |
1684 | return; |
1685 | ||
cc493e4f LR |
1686 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
1687 | request_wiphy && request_wiphy == wiphy && | |
a2f73b6c | 1688 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
c799ba6e JB |
1689 | pr_debug("Disabling freq %d MHz for good\n", |
1690 | chan->center_freq); | |
cc493e4f LR |
1691 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; |
1692 | chan->flags = chan->orig_flags; | |
1693 | } else { | |
c799ba6e JB |
1694 | pr_debug("Disabling freq %d MHz\n", |
1695 | chan->center_freq); | |
cc493e4f LR |
1696 | chan->flags |= IEEE80211_CHAN_DISABLED; |
1697 | } | |
8318d78a | 1698 | return; |
ca4ffe8f | 1699 | } |
8318d78a | 1700 | |
b0dfd2ea | 1701 | regd = reg_get_regdomain(wiphy); |
e702d3cf | 1702 | |
b2e1b302 | 1703 | power_rule = ®_rule->power_rule; |
1aeb135f | 1704 | bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan); |
b2e1b302 | 1705 | |
c492db37 | 1706 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 1707 | request_wiphy && request_wiphy == wiphy && |
a2f73b6c | 1708 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
fb1fc7ad | 1709 | /* |
25985edc | 1710 | * This guarantees the driver's requested regulatory domain |
f976376d | 1711 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
1712 | * settings |
1713 | */ | |
f976376d | 1714 | chan->flags = chan->orig_flags = |
038659e7 | 1715 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
1716 | chan->max_antenna_gain = chan->orig_mag = |
1717 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
279f0f55 | 1718 | chan->max_reg_power = chan->max_power = chan->orig_mpwr = |
f976376d | 1719 | (int) MBM_TO_DBM(power_rule->max_eirp); |
4f267c11 JD |
1720 | |
1721 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1722 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1723 | if (reg_rule->dfs_cac_ms) | |
1724 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1725 | } | |
1726 | ||
f976376d LR |
1727 | return; |
1728 | } | |
1729 | ||
04f39047 SW |
1730 | chan->dfs_state = NL80211_DFS_USABLE; |
1731 | chan->dfs_state_entered = jiffies; | |
1732 | ||
aa3d7eef | 1733 | chan->beacon_found = false; |
038659e7 | 1734 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
1a919318 JB |
1735 | chan->max_antenna_gain = |
1736 | min_t(int, chan->orig_mag, | |
1737 | MBI_TO_DBI(power_rule->max_antenna_gain)); | |
eccc068e | 1738 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
089027e5 JD |
1739 | |
1740 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1741 | if (reg_rule->dfs_cac_ms) | |
1742 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1743 | else | |
1744 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1745 | } | |
1746 | ||
5e31fc08 SG |
1747 | if (chan->orig_mpwr) { |
1748 | /* | |
a09a85a0 LR |
1749 | * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER |
1750 | * will always follow the passed country IE power settings. | |
5e31fc08 SG |
1751 | */ |
1752 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a09a85a0 | 1753 | wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER) |
5e31fc08 SG |
1754 | chan->max_power = chan->max_reg_power; |
1755 | else | |
1756 | chan->max_power = min(chan->orig_mpwr, | |
1757 | chan->max_reg_power); | |
1758 | } else | |
1759 | chan->max_power = chan->max_reg_power; | |
8318d78a JB |
1760 | } |
1761 | ||
7ca43d03 | 1762 | static void handle_band(struct wiphy *wiphy, |
fdc9d7b2 JB |
1763 | enum nl80211_reg_initiator initiator, |
1764 | struct ieee80211_supported_band *sband) | |
8318d78a | 1765 | { |
a92a3ce7 | 1766 | unsigned int i; |
a92a3ce7 | 1767 | |
fdc9d7b2 JB |
1768 | if (!sband) |
1769 | return; | |
8318d78a JB |
1770 | |
1771 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1772 | handle_channel(wiphy, initiator, &sband->channels[i]); |
8318d78a JB |
1773 | } |
1774 | ||
57b5ce07 LR |
1775 | static bool reg_request_cell_base(struct regulatory_request *request) |
1776 | { | |
1777 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1778 | return false; | |
1a919318 | 1779 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; |
57b5ce07 LR |
1780 | } |
1781 | ||
1782 | bool reg_last_request_cell_base(void) | |
1783 | { | |
38fd2143 | 1784 | return reg_request_cell_base(get_last_request()); |
57b5ce07 LR |
1785 | } |
1786 | ||
94fc661f | 1787 | #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS |
57b5ce07 | 1788 | /* Core specific check */ |
2f92212b JB |
1789 | static enum reg_request_treatment |
1790 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 | 1791 | { |
c492db37 JB |
1792 | struct regulatory_request *lr = get_last_request(); |
1793 | ||
57b5ce07 | 1794 | if (!reg_num_devs_support_basehint) |
2f92212b | 1795 | return REG_REQ_IGNORE; |
57b5ce07 | 1796 | |
c492db37 | 1797 | if (reg_request_cell_base(lr) && |
1a919318 | 1798 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 1799 | return REG_REQ_ALREADY_SET; |
1a919318 | 1800 | |
2f92212b | 1801 | return REG_REQ_OK; |
57b5ce07 LR |
1802 | } |
1803 | ||
1804 | /* Device specific check */ | |
1805 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
1806 | { | |
1a919318 | 1807 | return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); |
57b5ce07 LR |
1808 | } |
1809 | #else | |
a515de66 JB |
1810 | static enum reg_request_treatment |
1811 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 | 1812 | { |
2f92212b | 1813 | return REG_REQ_IGNORE; |
57b5ce07 | 1814 | } |
1a919318 JB |
1815 | |
1816 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
57b5ce07 LR |
1817 | { |
1818 | return true; | |
1819 | } | |
1820 | #endif | |
1821 | ||
fa1fb9cb LR |
1822 | static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy) |
1823 | { | |
a2f73b6c LR |
1824 | if (wiphy->regulatory_flags & REGULATORY_STRICT_REG && |
1825 | !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)) | |
fa1fb9cb LR |
1826 | return true; |
1827 | return false; | |
1828 | } | |
57b5ce07 | 1829 | |
7db90f4a LR |
1830 | static bool ignore_reg_update(struct wiphy *wiphy, |
1831 | enum nl80211_reg_initiator initiator) | |
14b9815a | 1832 | { |
c492db37 JB |
1833 | struct regulatory_request *lr = get_last_request(); |
1834 | ||
b0d7aa59 JD |
1835 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) |
1836 | return true; | |
1837 | ||
c492db37 | 1838 | if (!lr) { |
c799ba6e JB |
1839 | pr_debug("Ignoring regulatory request set by %s since last_request is not set\n", |
1840 | reg_initiator_name(initiator)); | |
14b9815a | 1841 | return true; |
926a0a09 LR |
1842 | } |
1843 | ||
7db90f4a | 1844 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
a2f73b6c | 1845 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { |
c799ba6e JB |
1846 | pr_debug("Ignoring regulatory request set by %s since the driver uses its own custom regulatory domain\n", |
1847 | reg_initiator_name(initiator)); | |
14b9815a | 1848 | return true; |
926a0a09 LR |
1849 | } |
1850 | ||
fb1fc7ad LR |
1851 | /* |
1852 | * wiphy->regd will be set once the device has its own | |
1853 | * desired regulatory domain set | |
1854 | */ | |
fa1fb9cb | 1855 | if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd && |
749b527b | 1856 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
c492db37 | 1857 | !is_world_regdom(lr->alpha2)) { |
c799ba6e JB |
1858 | pr_debug("Ignoring regulatory request set by %s since the driver requires its own regulatory domain to be set first\n", |
1859 | reg_initiator_name(initiator)); | |
14b9815a | 1860 | return true; |
926a0a09 LR |
1861 | } |
1862 | ||
c492db37 | 1863 | if (reg_request_cell_base(lr)) |
57b5ce07 LR |
1864 | return reg_dev_ignore_cell_hint(wiphy); |
1865 | ||
14b9815a LR |
1866 | return false; |
1867 | } | |
1868 | ||
3195e489 LR |
1869 | static bool reg_is_world_roaming(struct wiphy *wiphy) |
1870 | { | |
1871 | const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); | |
1872 | const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); | |
1873 | struct regulatory_request *lr = get_last_request(); | |
1874 | ||
1875 | if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) | |
1876 | return true; | |
1877 | ||
1878 | if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a2f73b6c | 1879 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
3195e489 LR |
1880 | return true; |
1881 | ||
1882 | return false; | |
1883 | } | |
1884 | ||
1a919318 | 1885 | static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, |
e38f8a7a LR |
1886 | struct reg_beacon *reg_beacon) |
1887 | { | |
e38f8a7a LR |
1888 | struct ieee80211_supported_band *sband; |
1889 | struct ieee80211_channel *chan; | |
6bad8766 LR |
1890 | bool channel_changed = false; |
1891 | struct ieee80211_channel chan_before; | |
e38f8a7a | 1892 | |
e38f8a7a LR |
1893 | sband = wiphy->bands[reg_beacon->chan.band]; |
1894 | chan = &sband->channels[chan_idx]; | |
1895 | ||
1896 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1897 | return; | |
1898 | ||
6bad8766 LR |
1899 | if (chan->beacon_found) |
1900 | return; | |
1901 | ||
1902 | chan->beacon_found = true; | |
1903 | ||
0f500a5f LR |
1904 | if (!reg_is_world_roaming(wiphy)) |
1905 | return; | |
1906 | ||
a2f73b6c | 1907 | if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS) |
37184244 LR |
1908 | return; |
1909 | ||
a48a52b7 | 1910 | chan_before = *chan; |
6bad8766 | 1911 | |
8fe02e16 LR |
1912 | if (chan->flags & IEEE80211_CHAN_NO_IR) { |
1913 | chan->flags &= ~IEEE80211_CHAN_NO_IR; | |
6bad8766 | 1914 | channel_changed = true; |
e38f8a7a LR |
1915 | } |
1916 | ||
6bad8766 LR |
1917 | if (channel_changed) |
1918 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1919 | } |
1920 | ||
1921 | /* | |
1922 | * Called when a scan on a wiphy finds a beacon on | |
1923 | * new channel | |
1924 | */ | |
1925 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1926 | struct reg_beacon *reg_beacon) | |
1927 | { | |
1928 | unsigned int i; | |
1929 | struct ieee80211_supported_band *sband; | |
1930 | ||
e38f8a7a LR |
1931 | if (!wiphy->bands[reg_beacon->chan.band]) |
1932 | return; | |
1933 | ||
1934 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1935 | ||
1936 | for (i = 0; i < sband->n_channels; i++) | |
1937 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1938 | } | |
1939 | ||
1940 | /* | |
1941 | * Called upon reg changes or a new wiphy is added | |
1942 | */ | |
1943 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1944 | { | |
1945 | unsigned int i; | |
1946 | struct ieee80211_supported_band *sband; | |
1947 | struct reg_beacon *reg_beacon; | |
1948 | ||
e38f8a7a LR |
1949 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
1950 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1951 | continue; | |
1952 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1953 | for (i = 0; i < sband->n_channels; i++) | |
1954 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1955 | } | |
1956 | } | |
1957 | ||
e38f8a7a LR |
1958 | /* Reap the advantages of previously found beacons */ |
1959 | static void reg_process_beacons(struct wiphy *wiphy) | |
1960 | { | |
b1ed8ddd LR |
1961 | /* |
1962 | * Means we are just firing up cfg80211, so no beacons would | |
1963 | * have been processed yet. | |
1964 | */ | |
1965 | if (!last_request) | |
1966 | return; | |
e38f8a7a LR |
1967 | wiphy_update_beacon_reg(wiphy); |
1968 | } | |
1969 | ||
1a919318 | 1970 | static bool is_ht40_allowed(struct ieee80211_channel *chan) |
038659e7 LR |
1971 | { |
1972 | if (!chan) | |
1a919318 | 1973 | return false; |
038659e7 | 1974 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
1a919318 | 1975 | return false; |
038659e7 | 1976 | /* This would happen when regulatory rules disallow HT40 completely */ |
55b183ad FF |
1977 | if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) |
1978 | return false; | |
1979 | return true; | |
038659e7 LR |
1980 | } |
1981 | ||
1982 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
fdc9d7b2 | 1983 | struct ieee80211_channel *channel) |
038659e7 | 1984 | { |
fdc9d7b2 | 1985 | struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; |
038659e7 | 1986 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
4e0854a7 | 1987 | const struct ieee80211_regdomain *regd; |
038659e7 | 1988 | unsigned int i; |
4e0854a7 | 1989 | u32 flags; |
038659e7 | 1990 | |
1a919318 | 1991 | if (!is_ht40_allowed(channel)) { |
038659e7 LR |
1992 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
1993 | return; | |
1994 | } | |
1995 | ||
1996 | /* | |
1997 | * We need to ensure the extension channels exist to | |
1998 | * be able to use HT40- or HT40+, this finds them (or not) | |
1999 | */ | |
2000 | for (i = 0; i < sband->n_channels; i++) { | |
2001 | struct ieee80211_channel *c = &sband->channels[i]; | |
1a919318 | 2002 | |
038659e7 LR |
2003 | if (c->center_freq == (channel->center_freq - 20)) |
2004 | channel_before = c; | |
2005 | if (c->center_freq == (channel->center_freq + 20)) | |
2006 | channel_after = c; | |
2007 | } | |
2008 | ||
4e0854a7 EG |
2009 | flags = 0; |
2010 | regd = get_wiphy_regdom(wiphy); | |
2011 | if (regd) { | |
2012 | const struct ieee80211_reg_rule *reg_rule = | |
2013 | freq_reg_info_regd(MHZ_TO_KHZ(channel->center_freq), | |
2014 | regd, MHZ_TO_KHZ(20)); | |
2015 | ||
2016 | if (!IS_ERR(reg_rule)) | |
2017 | flags = reg_rule->flags; | |
2018 | } | |
2019 | ||
038659e7 LR |
2020 | /* |
2021 | * Please note that this assumes target bandwidth is 20 MHz, | |
2022 | * if that ever changes we also need to change the below logic | |
2023 | * to include that as well. | |
2024 | */ | |
4e0854a7 EG |
2025 | if (!is_ht40_allowed(channel_before) || |
2026 | flags & NL80211_RRF_NO_HT40MINUS) | |
689da1b3 | 2027 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 2028 | else |
689da1b3 | 2029 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 2030 | |
4e0854a7 EG |
2031 | if (!is_ht40_allowed(channel_after) || |
2032 | flags & NL80211_RRF_NO_HT40PLUS) | |
689da1b3 | 2033 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 2034 | else |
689da1b3 | 2035 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
2036 | } |
2037 | ||
2038 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
fdc9d7b2 | 2039 | struct ieee80211_supported_band *sband) |
038659e7 LR |
2040 | { |
2041 | unsigned int i; | |
038659e7 | 2042 | |
fdc9d7b2 JB |
2043 | if (!sband) |
2044 | return; | |
038659e7 LR |
2045 | |
2046 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 2047 | reg_process_ht_flags_channel(wiphy, &sband->channels[i]); |
038659e7 LR |
2048 | } |
2049 | ||
2050 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
2051 | { | |
57fbcce3 | 2052 | enum nl80211_band band; |
038659e7 LR |
2053 | |
2054 | if (!wiphy) | |
2055 | return; | |
2056 | ||
57fbcce3 | 2057 | for (band = 0; band < NUM_NL80211_BANDS; band++) |
fdc9d7b2 | 2058 | reg_process_ht_flags_band(wiphy, wiphy->bands[band]); |
038659e7 LR |
2059 | } |
2060 | ||
0e3802db LR |
2061 | static void reg_call_notifier(struct wiphy *wiphy, |
2062 | struct regulatory_request *request) | |
2063 | { | |
2064 | if (wiphy->reg_notifier) | |
2065 | wiphy->reg_notifier(wiphy, request); | |
2066 | } | |
2067 | ||
ad932f04 AN |
2068 | static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev) |
2069 | { | |
ad932f04 AN |
2070 | struct cfg80211_chan_def chandef; |
2071 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); | |
20658702 | 2072 | enum nl80211_iftype iftype; |
ad932f04 AN |
2073 | |
2074 | wdev_lock(wdev); | |
20658702 | 2075 | iftype = wdev->iftype; |
ad932f04 | 2076 | |
20658702 | 2077 | /* make sure the interface is active */ |
ad932f04 | 2078 | if (!wdev->netdev || !netif_running(wdev->netdev)) |
20658702 | 2079 | goto wdev_inactive_unlock; |
ad932f04 | 2080 | |
20658702 | 2081 | switch (iftype) { |
ad932f04 AN |
2082 | case NL80211_IFTYPE_AP: |
2083 | case NL80211_IFTYPE_P2P_GO: | |
2084 | if (!wdev->beacon_interval) | |
20658702 AN |
2085 | goto wdev_inactive_unlock; |
2086 | chandef = wdev->chandef; | |
185076d6 AN |
2087 | break; |
2088 | case NL80211_IFTYPE_ADHOC: | |
2089 | if (!wdev->ssid_len) | |
20658702 AN |
2090 | goto wdev_inactive_unlock; |
2091 | chandef = wdev->chandef; | |
ad932f04 AN |
2092 | break; |
2093 | case NL80211_IFTYPE_STATION: | |
2094 | case NL80211_IFTYPE_P2P_CLIENT: | |
ad932f04 AN |
2095 | if (!wdev->current_bss || |
2096 | !wdev->current_bss->pub.channel) | |
20658702 | 2097 | goto wdev_inactive_unlock; |
ad932f04 | 2098 | |
20658702 AN |
2099 | if (!rdev->ops->get_channel || |
2100 | rdev_get_channel(rdev, wdev, &chandef)) | |
2101 | cfg80211_chandef_create(&chandef, | |
2102 | wdev->current_bss->pub.channel, | |
2103 | NL80211_CHAN_NO_HT); | |
ad932f04 AN |
2104 | break; |
2105 | case NL80211_IFTYPE_MONITOR: | |
2106 | case NL80211_IFTYPE_AP_VLAN: | |
2107 | case NL80211_IFTYPE_P2P_DEVICE: | |
2108 | /* no enforcement required */ | |
2109 | break; | |
2110 | default: | |
2111 | /* others not implemented for now */ | |
2112 | WARN_ON(1); | |
2113 | break; | |
2114 | } | |
2115 | ||
ad932f04 | 2116 | wdev_unlock(wdev); |
20658702 AN |
2117 | |
2118 | switch (iftype) { | |
2119 | case NL80211_IFTYPE_AP: | |
2120 | case NL80211_IFTYPE_P2P_GO: | |
2121 | case NL80211_IFTYPE_ADHOC: | |
923b352f | 2122 | return cfg80211_reg_can_beacon_relax(wiphy, &chandef, iftype); |
20658702 AN |
2123 | case NL80211_IFTYPE_STATION: |
2124 | case NL80211_IFTYPE_P2P_CLIENT: | |
2125 | return cfg80211_chandef_usable(wiphy, &chandef, | |
2126 | IEEE80211_CHAN_DISABLED); | |
2127 | default: | |
2128 | break; | |
2129 | } | |
2130 | ||
2131 | return true; | |
2132 | ||
2133 | wdev_inactive_unlock: | |
2134 | wdev_unlock(wdev); | |
2135 | return true; | |
ad932f04 AN |
2136 | } |
2137 | ||
2138 | static void reg_leave_invalid_chans(struct wiphy *wiphy) | |
2139 | { | |
2140 | struct wireless_dev *wdev; | |
2141 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); | |
2142 | ||
2143 | ASSERT_RTNL(); | |
2144 | ||
53873f13 | 2145 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) |
ad932f04 AN |
2146 | if (!reg_wdev_chan_valid(wiphy, wdev)) |
2147 | cfg80211_leave(rdev, wdev); | |
2148 | } | |
2149 | ||
2150 | static void reg_check_chans_work(struct work_struct *work) | |
2151 | { | |
2152 | struct cfg80211_registered_device *rdev; | |
2153 | ||
c799ba6e | 2154 | pr_debug("Verifying active interfaces after reg change\n"); |
ad932f04 AN |
2155 | rtnl_lock(); |
2156 | ||
2157 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) | |
2158 | if (!(rdev->wiphy.regulatory_flags & | |
2159 | REGULATORY_IGNORE_STALE_KICKOFF)) | |
2160 | reg_leave_invalid_chans(&rdev->wiphy); | |
2161 | ||
2162 | rtnl_unlock(); | |
2163 | } | |
2164 | ||
2165 | static void reg_check_channels(void) | |
2166 | { | |
2167 | /* | |
2168 | * Give usermode a chance to do something nicer (move to another | |
2169 | * channel, orderly disconnection), before forcing a disconnection. | |
2170 | */ | |
2171 | mod_delayed_work(system_power_efficient_wq, | |
2172 | ®_check_chans, | |
2173 | msecs_to_jiffies(REG_ENFORCE_GRACE_MS)); | |
2174 | } | |
2175 | ||
eac03e38 SN |
2176 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
2177 | enum nl80211_reg_initiator initiator) | |
b2e1b302 | 2178 | { |
57fbcce3 | 2179 | enum nl80211_band band; |
c492db37 | 2180 | struct regulatory_request *lr = get_last_request(); |
eac03e38 | 2181 | |
0e3802db LR |
2182 | if (ignore_reg_update(wiphy, initiator)) { |
2183 | /* | |
2184 | * Regulatory updates set by CORE are ignored for custom | |
2185 | * regulatory cards. Let us notify the changes to the driver, | |
2186 | * as some drivers used this to restore its orig_* reg domain. | |
2187 | */ | |
2188 | if (initiator == NL80211_REGDOM_SET_BY_CORE && | |
e31f6456 AS |
2189 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG && |
2190 | !(wiphy->regulatory_flags & | |
2191 | REGULATORY_WIPHY_SELF_MANAGED)) | |
0e3802db | 2192 | reg_call_notifier(wiphy, lr); |
a203c2aa | 2193 | return; |
0e3802db | 2194 | } |
a203c2aa | 2195 | |
c492db37 | 2196 | lr->dfs_region = get_cfg80211_regdom()->dfs_region; |
b68e6b3b | 2197 | |
57fbcce3 | 2198 | for (band = 0; band < NUM_NL80211_BANDS; band++) |
fdc9d7b2 | 2199 | handle_band(wiphy, initiator, wiphy->bands[band]); |
a203c2aa | 2200 | |
e38f8a7a | 2201 | reg_process_beacons(wiphy); |
038659e7 | 2202 | reg_process_ht_flags(wiphy); |
0e3802db | 2203 | reg_call_notifier(wiphy, lr); |
b2e1b302 LR |
2204 | } |
2205 | ||
d7549cbb SN |
2206 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
2207 | { | |
2208 | struct cfg80211_registered_device *rdev; | |
4a38994f | 2209 | struct wiphy *wiphy; |
d7549cbb | 2210 | |
5fe231e8 | 2211 | ASSERT_RTNL(); |
458f4f9e | 2212 | |
4a38994f RM |
2213 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
2214 | wiphy = &rdev->wiphy; | |
2215 | wiphy_update_regulatory(wiphy, initiator); | |
4a38994f | 2216 | } |
ad932f04 AN |
2217 | |
2218 | reg_check_channels(); | |
d7549cbb SN |
2219 | } |
2220 | ||
1fa25e41 | 2221 | static void handle_channel_custom(struct wiphy *wiphy, |
fdc9d7b2 | 2222 | struct ieee80211_channel *chan, |
1fa25e41 LR |
2223 | const struct ieee80211_regdomain *regd) |
2224 | { | |
038659e7 | 2225 | u32 bw_flags = 0; |
1fa25e41 LR |
2226 | const struct ieee80211_reg_rule *reg_rule = NULL; |
2227 | const struct ieee80211_power_rule *power_rule = NULL; | |
4edd5698 | 2228 | u32 bw; |
ac46d48e | 2229 | |
4edd5698 | 2230 | for (bw = MHZ_TO_KHZ(20); bw >= MHZ_TO_KHZ(5); bw = bw / 2) { |
49172874 | 2231 | reg_rule = freq_reg_info_regd(MHZ_TO_KHZ(chan->center_freq), |
4edd5698 MM |
2232 | regd, bw); |
2233 | if (!IS_ERR(reg_rule)) | |
2234 | break; | |
2235 | } | |
1fa25e41 | 2236 | |
361c9c8b | 2237 | if (IS_ERR(reg_rule)) { |
c799ba6e JB |
2238 | pr_debug("Disabling freq %d MHz as custom regd has no rule that fits it\n", |
2239 | chan->center_freq); | |
db8dfee5 AN |
2240 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) { |
2241 | chan->flags |= IEEE80211_CHAN_DISABLED; | |
2242 | } else { | |
2243 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; | |
2244 | chan->flags = chan->orig_flags; | |
2245 | } | |
1fa25e41 LR |
2246 | return; |
2247 | } | |
2248 | ||
2249 | power_rule = ®_rule->power_rule; | |
1aeb135f | 2250 | bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan); |
1fa25e41 | 2251 | |
2e18b38f | 2252 | chan->dfs_state_entered = jiffies; |
c7ab5081 AN |
2253 | chan->dfs_state = NL80211_DFS_USABLE; |
2254 | ||
2255 | chan->beacon_found = false; | |
db8dfee5 AN |
2256 | |
2257 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) | |
2258 | chan->flags = chan->orig_flags | bw_flags | | |
2259 | map_regdom_flags(reg_rule->flags); | |
2260 | else | |
2261 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; | |
2262 | ||
1fa25e41 | 2263 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
279f0f55 FF |
2264 | chan->max_reg_power = chan->max_power = |
2265 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
2e18b38f AN |
2266 | |
2267 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
2268 | if (reg_rule->dfs_cac_ms) | |
2269 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
2270 | else | |
2271 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
2272 | } | |
2273 | ||
2274 | chan->max_power = chan->max_reg_power; | |
1fa25e41 LR |
2275 | } |
2276 | ||
fdc9d7b2 JB |
2277 | static void handle_band_custom(struct wiphy *wiphy, |
2278 | struct ieee80211_supported_band *sband, | |
1fa25e41 LR |
2279 | const struct ieee80211_regdomain *regd) |
2280 | { | |
2281 | unsigned int i; | |
1fa25e41 | 2282 | |
fdc9d7b2 JB |
2283 | if (!sband) |
2284 | return; | |
1fa25e41 LR |
2285 | |
2286 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 2287 | handle_channel_custom(wiphy, &sband->channels[i], regd); |
1fa25e41 LR |
2288 | } |
2289 | ||
2290 | /* Used by drivers prior to wiphy registration */ | |
2291 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
2292 | const struct ieee80211_regdomain *regd) | |
2293 | { | |
57fbcce3 | 2294 | enum nl80211_band band; |
bbcf3f02 | 2295 | unsigned int bands_set = 0; |
ac46d48e | 2296 | |
a2f73b6c LR |
2297 | WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG), |
2298 | "wiphy should have REGULATORY_CUSTOM_REG\n"); | |
2299 | wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG; | |
222ea581 | 2300 | |
57fbcce3 | 2301 | for (band = 0; band < NUM_NL80211_BANDS; band++) { |
bbcf3f02 LR |
2302 | if (!wiphy->bands[band]) |
2303 | continue; | |
fdc9d7b2 | 2304 | handle_band_custom(wiphy, wiphy->bands[band], regd); |
bbcf3f02 | 2305 | bands_set++; |
b2e1b302 | 2306 | } |
bbcf3f02 LR |
2307 | |
2308 | /* | |
2309 | * no point in calling this if it won't have any effect | |
1a919318 | 2310 | * on your device's supported bands. |
bbcf3f02 LR |
2311 | */ |
2312 | WARN_ON(!bands_set); | |
b2e1b302 | 2313 | } |
1fa25e41 LR |
2314 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
2315 | ||
b2e253cf LR |
2316 | static void reg_set_request_processed(void) |
2317 | { | |
2318 | bool need_more_processing = false; | |
c492db37 | 2319 | struct regulatory_request *lr = get_last_request(); |
b2e253cf | 2320 | |
c492db37 | 2321 | lr->processed = true; |
b2e253cf LR |
2322 | |
2323 | spin_lock(®_requests_lock); | |
2324 | if (!list_empty(®_requests_list)) | |
2325 | need_more_processing = true; | |
2326 | spin_unlock(®_requests_lock); | |
2327 | ||
b6863036 | 2328 | cancel_crda_timeout(); |
a90c7a31 | 2329 | |
b2e253cf LR |
2330 | if (need_more_processing) |
2331 | schedule_work(®_work); | |
2332 | } | |
2333 | ||
b3eb7f3f LR |
2334 | /** |
2335 | * reg_process_hint_core - process core regulatory requests | |
2336 | * @pending_request: a pending core regulatory request | |
2337 | * | |
2338 | * The wireless subsystem can use this function to process | |
2339 | * a regulatory request issued by the regulatory core. | |
b3eb7f3f | 2340 | */ |
d34265a3 JB |
2341 | static enum reg_request_treatment |
2342 | reg_process_hint_core(struct regulatory_request *core_request) | |
b3eb7f3f | 2343 | { |
cecbb069 | 2344 | if (reg_query_database(core_request)) { |
25b20dbd JB |
2345 | core_request->intersect = false; |
2346 | core_request->processed = false; | |
2347 | reg_update_last_request(core_request); | |
d34265a3 | 2348 | return REG_REQ_OK; |
25b20dbd | 2349 | } |
d34265a3 JB |
2350 | |
2351 | return REG_REQ_IGNORE; | |
b3eb7f3f LR |
2352 | } |
2353 | ||
0d97a619 LR |
2354 | static enum reg_request_treatment |
2355 | __reg_process_hint_user(struct regulatory_request *user_request) | |
2356 | { | |
2357 | struct regulatory_request *lr = get_last_request(); | |
2358 | ||
2359 | if (reg_request_cell_base(user_request)) | |
2360 | return reg_ignore_cell_hint(user_request); | |
2361 | ||
2362 | if (reg_request_cell_base(lr)) | |
2363 | return REG_REQ_IGNORE; | |
2364 | ||
2365 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
2366 | return REG_REQ_INTERSECT; | |
2367 | /* | |
2368 | * If the user knows better the user should set the regdom | |
2369 | * to their country before the IE is picked up | |
2370 | */ | |
2371 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER && | |
2372 | lr->intersect) | |
2373 | return REG_REQ_IGNORE; | |
2374 | /* | |
2375 | * Process user requests only after previous user/driver/core | |
2376 | * requests have been processed | |
2377 | */ | |
2378 | if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || | |
2379 | lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
2380 | lr->initiator == NL80211_REGDOM_SET_BY_USER) && | |
2381 | regdom_changes(lr->alpha2)) | |
2382 | return REG_REQ_IGNORE; | |
2383 | ||
2384 | if (!regdom_changes(user_request->alpha2)) | |
2385 | return REG_REQ_ALREADY_SET; | |
2386 | ||
2387 | return REG_REQ_OK; | |
2388 | } | |
2389 | ||
2390 | /** | |
2391 | * reg_process_hint_user - process user regulatory requests | |
2392 | * @user_request: a pending user regulatory request | |
2393 | * | |
2394 | * The wireless subsystem can use this function to process | |
2395 | * a regulatory request initiated by userspace. | |
0d97a619 | 2396 | */ |
d34265a3 JB |
2397 | static enum reg_request_treatment |
2398 | reg_process_hint_user(struct regulatory_request *user_request) | |
0d97a619 LR |
2399 | { |
2400 | enum reg_request_treatment treatment; | |
0d97a619 LR |
2401 | |
2402 | treatment = __reg_process_hint_user(user_request); | |
2403 | if (treatment == REG_REQ_IGNORE || | |
d34265a3 JB |
2404 | treatment == REG_REQ_ALREADY_SET) |
2405 | return REG_REQ_IGNORE; | |
0d97a619 | 2406 | |
0d97a619 LR |
2407 | user_request->intersect = treatment == REG_REQ_INTERSECT; |
2408 | user_request->processed = false; | |
5ad6ef5e | 2409 | |
cecbb069 | 2410 | if (reg_query_database(user_request)) { |
25b20dbd JB |
2411 | reg_update_last_request(user_request); |
2412 | user_alpha2[0] = user_request->alpha2[0]; | |
2413 | user_alpha2[1] = user_request->alpha2[1]; | |
d34265a3 | 2414 | return REG_REQ_OK; |
25b20dbd | 2415 | } |
d34265a3 JB |
2416 | |
2417 | return REG_REQ_IGNORE; | |
0d97a619 LR |
2418 | } |
2419 | ||
21636c7f LR |
2420 | static enum reg_request_treatment |
2421 | __reg_process_hint_driver(struct regulatory_request *driver_request) | |
2422 | { | |
2423 | struct regulatory_request *lr = get_last_request(); | |
2424 | ||
2425 | if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { | |
2426 | if (regdom_changes(driver_request->alpha2)) | |
2427 | return REG_REQ_OK; | |
2428 | return REG_REQ_ALREADY_SET; | |
2429 | } | |
2430 | ||
2431 | /* | |
2432 | * This would happen if you unplug and plug your card | |
2433 | * back in or if you add a new device for which the previously | |
2434 | * loaded card also agrees on the regulatory domain. | |
2435 | */ | |
2436 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && | |
2437 | !regdom_changes(driver_request->alpha2)) | |
2438 | return REG_REQ_ALREADY_SET; | |
2439 | ||
2440 | return REG_REQ_INTERSECT; | |
2441 | } | |
2442 | ||
2443 | /** | |
2444 | * reg_process_hint_driver - process driver regulatory requests | |
2445 | * @driver_request: a pending driver regulatory request | |
2446 | * | |
2447 | * The wireless subsystem can use this function to process | |
2448 | * a regulatory request issued by an 802.11 driver. | |
2449 | * | |
2450 | * Returns one of the different reg request treatment values. | |
2451 | */ | |
2452 | static enum reg_request_treatment | |
2453 | reg_process_hint_driver(struct wiphy *wiphy, | |
2454 | struct regulatory_request *driver_request) | |
2455 | { | |
34f05f54 | 2456 | const struct ieee80211_regdomain *regd, *tmp; |
21636c7f | 2457 | enum reg_request_treatment treatment; |
21636c7f LR |
2458 | |
2459 | treatment = __reg_process_hint_driver(driver_request); | |
2460 | ||
2461 | switch (treatment) { | |
2462 | case REG_REQ_OK: | |
2463 | break; | |
2464 | case REG_REQ_IGNORE: | |
d34265a3 | 2465 | return REG_REQ_IGNORE; |
21636c7f | 2466 | case REG_REQ_INTERSECT: |
21636c7f LR |
2467 | case REG_REQ_ALREADY_SET: |
2468 | regd = reg_copy_regd(get_cfg80211_regdom()); | |
d34265a3 JB |
2469 | if (IS_ERR(regd)) |
2470 | return REG_REQ_IGNORE; | |
34f05f54 AN |
2471 | |
2472 | tmp = get_wiphy_regdom(wiphy); | |
21636c7f | 2473 | rcu_assign_pointer(wiphy->regd, regd); |
34f05f54 | 2474 | rcu_free_regdom(tmp); |
21636c7f LR |
2475 | } |
2476 | ||
21636c7f LR |
2477 | |
2478 | driver_request->intersect = treatment == REG_REQ_INTERSECT; | |
2479 | driver_request->processed = false; | |
5ad6ef5e | 2480 | |
21636c7f LR |
2481 | /* |
2482 | * Since CRDA will not be called in this case as we already | |
2483 | * have applied the requested regulatory domain before we just | |
2484 | * inform userspace we have processed the request | |
2485 | */ | |
2486 | if (treatment == REG_REQ_ALREADY_SET) { | |
2487 | nl80211_send_reg_change_event(driver_request); | |
25b20dbd | 2488 | reg_update_last_request(driver_request); |
21636c7f | 2489 | reg_set_request_processed(); |
480908a7 | 2490 | return REG_REQ_ALREADY_SET; |
21636c7f LR |
2491 | } |
2492 | ||
d34265a3 | 2493 | if (reg_query_database(driver_request)) { |
25b20dbd | 2494 | reg_update_last_request(driver_request); |
d34265a3 JB |
2495 | return REG_REQ_OK; |
2496 | } | |
25b20dbd | 2497 | |
d34265a3 | 2498 | return REG_REQ_IGNORE; |
21636c7f LR |
2499 | } |
2500 | ||
b23e7a9e LR |
2501 | static enum reg_request_treatment |
2502 | __reg_process_hint_country_ie(struct wiphy *wiphy, | |
2503 | struct regulatory_request *country_ie_request) | |
2504 | { | |
2505 | struct wiphy *last_wiphy = NULL; | |
2506 | struct regulatory_request *lr = get_last_request(); | |
2507 | ||
2508 | if (reg_request_cell_base(lr)) { | |
2509 | /* Trust a Cell base station over the AP's country IE */ | |
2510 | if (regdom_changes(country_ie_request->alpha2)) | |
2511 | return REG_REQ_IGNORE; | |
2512 | return REG_REQ_ALREADY_SET; | |
2a901468 LR |
2513 | } else { |
2514 | if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE) | |
2515 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
2516 | } |
2517 | ||
b23e7a9e LR |
2518 | if (unlikely(!is_an_alpha2(country_ie_request->alpha2))) |
2519 | return -EINVAL; | |
2f1c6c57 LR |
2520 | |
2521 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
2522 | return REG_REQ_OK; | |
2523 | ||
2524 | last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
2525 | ||
2526 | if (last_wiphy != wiphy) { | |
b23e7a9e | 2527 | /* |
2f1c6c57 LR |
2528 | * Two cards with two APs claiming different |
2529 | * Country IE alpha2s. We could | |
2530 | * intersect them, but that seems unlikely | |
2531 | * to be correct. Reject second one for now. | |
b23e7a9e | 2532 | */ |
2f1c6c57 LR |
2533 | if (regdom_changes(country_ie_request->alpha2)) |
2534 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
2535 | return REG_REQ_ALREADY_SET; |
2536 | } | |
70dcec5a EG |
2537 | |
2538 | if (regdom_changes(country_ie_request->alpha2)) | |
2f1c6c57 LR |
2539 | return REG_REQ_OK; |
2540 | return REG_REQ_ALREADY_SET; | |
b23e7a9e LR |
2541 | } |
2542 | ||
d1c96a9a | 2543 | /** |
b23e7a9e LR |
2544 | * reg_process_hint_country_ie - process regulatory requests from country IEs |
2545 | * @country_ie_request: a regulatory request from a country IE | |
d1c96a9a | 2546 | * |
b23e7a9e LR |
2547 | * The wireless subsystem can use this function to process |
2548 | * a regulatory request issued by a country Information Element. | |
d1c96a9a | 2549 | * |
2f92212b | 2550 | * Returns one of the different reg request treatment values. |
d1c96a9a | 2551 | */ |
2f92212b | 2552 | static enum reg_request_treatment |
b23e7a9e LR |
2553 | reg_process_hint_country_ie(struct wiphy *wiphy, |
2554 | struct regulatory_request *country_ie_request) | |
b2e1b302 | 2555 | { |
2f92212b | 2556 | enum reg_request_treatment treatment; |
761cf7ec | 2557 | |
b23e7a9e | 2558 | treatment = __reg_process_hint_country_ie(wiphy, country_ie_request); |
9c96477d | 2559 | |
2f92212b | 2560 | switch (treatment) { |
2f92212b JB |
2561 | case REG_REQ_OK: |
2562 | break; | |
b23e7a9e | 2563 | case REG_REQ_IGNORE: |
d34265a3 | 2564 | return REG_REQ_IGNORE; |
b23e7a9e | 2565 | case REG_REQ_ALREADY_SET: |
c888393b | 2566 | reg_free_request(country_ie_request); |
480908a7 | 2567 | return REG_REQ_ALREADY_SET; |
b23e7a9e | 2568 | case REG_REQ_INTERSECT: |
fb1fc7ad | 2569 | /* |
b23e7a9e LR |
2570 | * This doesn't happen yet, not sure we |
2571 | * ever want to support it for this case. | |
fb1fc7ad | 2572 | */ |
8db0c433 | 2573 | WARN_ONCE(1, "Unexpected intersection for country elements"); |
d34265a3 | 2574 | return REG_REQ_IGNORE; |
3e0c3ff3 | 2575 | } |
b2e1b302 | 2576 | |
b23e7a9e LR |
2577 | country_ie_request->intersect = false; |
2578 | country_ie_request->processed = false; | |
5ad6ef5e | 2579 | |
d34265a3 | 2580 | if (reg_query_database(country_ie_request)) { |
25b20dbd | 2581 | reg_update_last_request(country_ie_request); |
d34265a3 JB |
2582 | return REG_REQ_OK; |
2583 | } | |
3e0c3ff3 | 2584 | |
d34265a3 | 2585 | return REG_REQ_IGNORE; |
b2e1b302 LR |
2586 | } |
2587 | ||
89766727 VT |
2588 | bool reg_dfs_domain_same(struct wiphy *wiphy1, struct wiphy *wiphy2) |
2589 | { | |
2590 | const struct ieee80211_regdomain *wiphy1_regd = NULL; | |
2591 | const struct ieee80211_regdomain *wiphy2_regd = NULL; | |
2592 | const struct ieee80211_regdomain *cfg80211_regd = NULL; | |
2593 | bool dfs_domain_same; | |
2594 | ||
2595 | rcu_read_lock(); | |
2596 | ||
2597 | cfg80211_regd = rcu_dereference(cfg80211_regdomain); | |
2598 | wiphy1_regd = rcu_dereference(wiphy1->regd); | |
2599 | if (!wiphy1_regd) | |
2600 | wiphy1_regd = cfg80211_regd; | |
2601 | ||
2602 | wiphy2_regd = rcu_dereference(wiphy2->regd); | |
2603 | if (!wiphy2_regd) | |
2604 | wiphy2_regd = cfg80211_regd; | |
2605 | ||
2606 | dfs_domain_same = wiphy1_regd->dfs_region == wiphy2_regd->dfs_region; | |
2607 | ||
2608 | rcu_read_unlock(); | |
2609 | ||
2610 | return dfs_domain_same; | |
2611 | } | |
2612 | ||
2613 | static void reg_copy_dfs_chan_state(struct ieee80211_channel *dst_chan, | |
2614 | struct ieee80211_channel *src_chan) | |
2615 | { | |
2616 | if (!(dst_chan->flags & IEEE80211_CHAN_RADAR) || | |
2617 | !(src_chan->flags & IEEE80211_CHAN_RADAR)) | |
2618 | return; | |
2619 | ||
2620 | if (dst_chan->flags & IEEE80211_CHAN_DISABLED || | |
2621 | src_chan->flags & IEEE80211_CHAN_DISABLED) | |
2622 | return; | |
2623 | ||
2624 | if (src_chan->center_freq == dst_chan->center_freq && | |
2625 | dst_chan->dfs_state == NL80211_DFS_USABLE) { | |
2626 | dst_chan->dfs_state = src_chan->dfs_state; | |
2627 | dst_chan->dfs_state_entered = src_chan->dfs_state_entered; | |
2628 | } | |
2629 | } | |
2630 | ||
2631 | static void wiphy_share_dfs_chan_state(struct wiphy *dst_wiphy, | |
2632 | struct wiphy *src_wiphy) | |
2633 | { | |
2634 | struct ieee80211_supported_band *src_sband, *dst_sband; | |
2635 | struct ieee80211_channel *src_chan, *dst_chan; | |
2636 | int i, j, band; | |
2637 | ||
2638 | if (!reg_dfs_domain_same(dst_wiphy, src_wiphy)) | |
2639 | return; | |
2640 | ||
2641 | for (band = 0; band < NUM_NL80211_BANDS; band++) { | |
2642 | dst_sband = dst_wiphy->bands[band]; | |
2643 | src_sband = src_wiphy->bands[band]; | |
2644 | if (!dst_sband || !src_sband) | |
2645 | continue; | |
2646 | ||
2647 | for (i = 0; i < dst_sband->n_channels; i++) { | |
2648 | dst_chan = &dst_sband->channels[i]; | |
2649 | for (j = 0; j < src_sband->n_channels; j++) { | |
2650 | src_chan = &src_sband->channels[j]; | |
2651 | reg_copy_dfs_chan_state(dst_chan, src_chan); | |
2652 | } | |
2653 | } | |
2654 | } | |
2655 | } | |
2656 | ||
2657 | static void wiphy_all_share_dfs_chan_state(struct wiphy *wiphy) | |
2658 | { | |
2659 | struct cfg80211_registered_device *rdev; | |
2660 | ||
2661 | ASSERT_RTNL(); | |
2662 | ||
2663 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
2664 | if (wiphy == &rdev->wiphy) | |
2665 | continue; | |
2666 | wiphy_share_dfs_chan_state(wiphy, &rdev->wiphy); | |
2667 | } | |
2668 | } | |
2669 | ||
30a548c7 | 2670 | /* This processes *all* regulatory hints */ |
1daa37c7 | 2671 | static void reg_process_hint(struct regulatory_request *reg_request) |
fe33eb39 | 2672 | { |
fe33eb39 | 2673 | struct wiphy *wiphy = NULL; |
b3eb7f3f | 2674 | enum reg_request_treatment treatment; |
1db58529 | 2675 | enum nl80211_reg_initiator initiator = reg_request->initiator; |
fe33eb39 | 2676 | |
f4173766 | 2677 | if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) |
fe33eb39 LR |
2678 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
2679 | ||
1db58529 | 2680 | switch (initiator) { |
b3eb7f3f | 2681 | case NL80211_REGDOM_SET_BY_CORE: |
d34265a3 JB |
2682 | treatment = reg_process_hint_core(reg_request); |
2683 | break; | |
b3eb7f3f | 2684 | case NL80211_REGDOM_SET_BY_USER: |
d34265a3 JB |
2685 | treatment = reg_process_hint_user(reg_request); |
2686 | break; | |
b3eb7f3f | 2687 | case NL80211_REGDOM_SET_BY_DRIVER: |
772f0389 IP |
2688 | if (!wiphy) |
2689 | goto out_free; | |
21636c7f LR |
2690 | treatment = reg_process_hint_driver(wiphy, reg_request); |
2691 | break; | |
b3eb7f3f | 2692 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
772f0389 IP |
2693 | if (!wiphy) |
2694 | goto out_free; | |
b23e7a9e | 2695 | treatment = reg_process_hint_country_ie(wiphy, reg_request); |
b3eb7f3f LR |
2696 | break; |
2697 | default: | |
1db58529 | 2698 | WARN(1, "invalid initiator %d\n", initiator); |
772f0389 | 2699 | goto out_free; |
b3eb7f3f LR |
2700 | } |
2701 | ||
d34265a3 JB |
2702 | if (treatment == REG_REQ_IGNORE) |
2703 | goto out_free; | |
2704 | ||
480908a7 JB |
2705 | WARN(treatment != REG_REQ_OK && treatment != REG_REQ_ALREADY_SET, |
2706 | "unexpected treatment value %d\n", treatment); | |
2707 | ||
841b351c JL |
2708 | /* This is required so that the orig_* parameters are saved. |
2709 | * NOTE: treatment must be set for any case that reaches here! | |
2710 | */ | |
b23e7a9e | 2711 | if (treatment == REG_REQ_ALREADY_SET && wiphy && |
ad932f04 | 2712 | wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
1db58529 | 2713 | wiphy_update_regulatory(wiphy, initiator); |
89766727 | 2714 | wiphy_all_share_dfs_chan_state(wiphy); |
ad932f04 AN |
2715 | reg_check_channels(); |
2716 | } | |
772f0389 IP |
2717 | |
2718 | return; | |
2719 | ||
2720 | out_free: | |
c888393b | 2721 | reg_free_request(reg_request); |
fe33eb39 LR |
2722 | } |
2723 | ||
aced43ce AS |
2724 | static void notify_self_managed_wiphys(struct regulatory_request *request) |
2725 | { | |
2726 | struct cfg80211_registered_device *rdev; | |
2727 | struct wiphy *wiphy; | |
2728 | ||
2729 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
2730 | wiphy = &rdev->wiphy; | |
2731 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED && | |
2732 | request->initiator == NL80211_REGDOM_SET_BY_USER && | |
2733 | request->user_reg_hint_type == | |
2734 | NL80211_USER_REG_HINT_CELL_BASE) | |
2735 | reg_call_notifier(wiphy, request); | |
2736 | } | |
2737 | } | |
2738 | ||
b2e253cf LR |
2739 | /* |
2740 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
2741 | * Regulatory hints come on a first come first serve basis and we | |
2742 | * must process each one atomically. | |
2743 | */ | |
fe33eb39 | 2744 | static void reg_process_pending_hints(void) |
b0e2880b | 2745 | { |
c492db37 | 2746 | struct regulatory_request *reg_request, *lr; |
fe33eb39 | 2747 | |
c492db37 | 2748 | lr = get_last_request(); |
b0e2880b | 2749 | |
b2e253cf | 2750 | /* When last_request->processed becomes true this will be rescheduled */ |
c492db37 | 2751 | if (lr && !lr->processed) { |
96cce12f | 2752 | reg_process_hint(lr); |
5fe231e8 | 2753 | return; |
b2e253cf LR |
2754 | } |
2755 | ||
fe33eb39 | 2756 | spin_lock(®_requests_lock); |
fe33eb39 | 2757 | |
b2e253cf | 2758 | if (list_empty(®_requests_list)) { |
d951c1dd | 2759 | spin_unlock(®_requests_lock); |
5fe231e8 | 2760 | return; |
fe33eb39 | 2761 | } |
b2e253cf LR |
2762 | |
2763 | reg_request = list_first_entry(®_requests_list, | |
2764 | struct regulatory_request, | |
2765 | list); | |
2766 | list_del_init(®_request->list); | |
2767 | ||
fe33eb39 | 2768 | spin_unlock(®_requests_lock); |
b0e2880b | 2769 | |
aced43ce | 2770 | notify_self_managed_wiphys(reg_request); |
ef51fb1d | 2771 | |
1daa37c7 | 2772 | reg_process_hint(reg_request); |
2e54a689 B |
2773 | |
2774 | lr = get_last_request(); | |
2775 | ||
2776 | spin_lock(®_requests_lock); | |
2777 | if (!list_empty(®_requests_list) && lr && lr->processed) | |
2778 | schedule_work(®_work); | |
2779 | spin_unlock(®_requests_lock); | |
fe33eb39 LR |
2780 | } |
2781 | ||
e38f8a7a LR |
2782 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
2783 | static void reg_process_pending_beacon_hints(void) | |
2784 | { | |
79c97e97 | 2785 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
2786 | struct reg_beacon *pending_beacon, *tmp; |
2787 | ||
e38f8a7a LR |
2788 | /* This goes through the _pending_ beacon list */ |
2789 | spin_lock_bh(®_pending_beacons_lock); | |
2790 | ||
e38f8a7a LR |
2791 | list_for_each_entry_safe(pending_beacon, tmp, |
2792 | ®_pending_beacons, list) { | |
e38f8a7a LR |
2793 | list_del_init(&pending_beacon->list); |
2794 | ||
2795 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
2796 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
2797 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
2798 | |
2799 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
2800 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
2801 | } | |
2802 | ||
2803 | spin_unlock_bh(®_pending_beacons_lock); | |
e38f8a7a LR |
2804 | } |
2805 | ||
b0d7aa59 JD |
2806 | static void reg_process_self_managed_hints(void) |
2807 | { | |
2808 | struct cfg80211_registered_device *rdev; | |
2809 | struct wiphy *wiphy; | |
2810 | const struct ieee80211_regdomain *tmp; | |
2811 | const struct ieee80211_regdomain *regd; | |
57fbcce3 | 2812 | enum nl80211_band band; |
b0d7aa59 JD |
2813 | struct regulatory_request request = {}; |
2814 | ||
2815 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
2816 | wiphy = &rdev->wiphy; | |
2817 | ||
2818 | spin_lock(®_requests_lock); | |
2819 | regd = rdev->requested_regd; | |
2820 | rdev->requested_regd = NULL; | |
2821 | spin_unlock(®_requests_lock); | |
2822 | ||
2823 | if (regd == NULL) | |
2824 | continue; | |
2825 | ||
2826 | tmp = get_wiphy_regdom(wiphy); | |
2827 | rcu_assign_pointer(wiphy->regd, regd); | |
2828 | rcu_free_regdom(tmp); | |
2829 | ||
57fbcce3 | 2830 | for (band = 0; band < NUM_NL80211_BANDS; band++) |
b0d7aa59 JD |
2831 | handle_band_custom(wiphy, wiphy->bands[band], regd); |
2832 | ||
2833 | reg_process_ht_flags(wiphy); | |
2834 | ||
2835 | request.wiphy_idx = get_wiphy_idx(wiphy); | |
2836 | request.alpha2[0] = regd->alpha2[0]; | |
2837 | request.alpha2[1] = regd->alpha2[1]; | |
2838 | request.initiator = NL80211_REGDOM_SET_BY_DRIVER; | |
2839 | ||
2840 | nl80211_send_wiphy_reg_change_event(&request); | |
2841 | } | |
2842 | ||
2843 | reg_check_channels(); | |
2844 | } | |
2845 | ||
fe33eb39 LR |
2846 | static void reg_todo(struct work_struct *work) |
2847 | { | |
5fe231e8 | 2848 | rtnl_lock(); |
fe33eb39 | 2849 | reg_process_pending_hints(); |
e38f8a7a | 2850 | reg_process_pending_beacon_hints(); |
b0d7aa59 | 2851 | reg_process_self_managed_hints(); |
5fe231e8 | 2852 | rtnl_unlock(); |
fe33eb39 LR |
2853 | } |
2854 | ||
fe33eb39 LR |
2855 | static void queue_regulatory_request(struct regulatory_request *request) |
2856 | { | |
d4f2c881 JB |
2857 | request->alpha2[0] = toupper(request->alpha2[0]); |
2858 | request->alpha2[1] = toupper(request->alpha2[1]); | |
c61029c7 | 2859 | |
fe33eb39 LR |
2860 | spin_lock(®_requests_lock); |
2861 | list_add_tail(&request->list, ®_requests_list); | |
2862 | spin_unlock(®_requests_lock); | |
2863 | ||
2864 | schedule_work(®_work); | |
2865 | } | |
2866 | ||
09d989d1 LR |
2867 | /* |
2868 | * Core regulatory hint -- happens during cfg80211_init() | |
2869 | * and when we restore regulatory settings. | |
2870 | */ | |
ba25c141 LR |
2871 | static int regulatory_hint_core(const char *alpha2) |
2872 | { | |
2873 | struct regulatory_request *request; | |
2874 | ||
1a919318 | 2875 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
ba25c141 LR |
2876 | if (!request) |
2877 | return -ENOMEM; | |
2878 | ||
2879 | request->alpha2[0] = alpha2[0]; | |
2880 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2881 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
24f33e64 | 2882 | request->wiphy_idx = WIPHY_IDX_INVALID; |
ba25c141 | 2883 | |
31e99729 | 2884 | queue_regulatory_request(request); |
5078b2e3 | 2885 | |
fe33eb39 | 2886 | return 0; |
ba25c141 LR |
2887 | } |
2888 | ||
fe33eb39 | 2889 | /* User hints */ |
57b5ce07 LR |
2890 | int regulatory_hint_user(const char *alpha2, |
2891 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 2892 | { |
fe33eb39 LR |
2893 | struct regulatory_request *request; |
2894 | ||
fdc9d7b2 JB |
2895 | if (WARN_ON(!alpha2)) |
2896 | return -EINVAL; | |
b2e1b302 | 2897 | |
fe33eb39 LR |
2898 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
2899 | if (!request) | |
2900 | return -ENOMEM; | |
2901 | ||
f4173766 | 2902 | request->wiphy_idx = WIPHY_IDX_INVALID; |
fe33eb39 LR |
2903 | request->alpha2[0] = alpha2[0]; |
2904 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 2905 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 2906 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 | 2907 | |
c37722bd | 2908 | /* Allow calling CRDA again */ |
b6863036 | 2909 | reset_crda_timeouts(); |
c37722bd | 2910 | |
fe33eb39 LR |
2911 | queue_regulatory_request(request); |
2912 | ||
2913 | return 0; | |
2914 | } | |
2915 | ||
05050753 | 2916 | int regulatory_hint_indoor(bool is_indoor, u32 portid) |
52616f2b | 2917 | { |
05050753 | 2918 | spin_lock(®_indoor_lock); |
52616f2b | 2919 | |
05050753 I |
2920 | /* It is possible that more than one user space process is trying to |
2921 | * configure the indoor setting. To handle such cases, clear the indoor | |
2922 | * setting in case that some process does not think that the device | |
2923 | * is operating in an indoor environment. In addition, if a user space | |
2924 | * process indicates that it is controlling the indoor setting, save its | |
2925 | * portid, i.e., make it the owner. | |
2926 | */ | |
2927 | reg_is_indoor = is_indoor; | |
2928 | if (reg_is_indoor) { | |
2929 | if (!reg_is_indoor_portid) | |
2930 | reg_is_indoor_portid = portid; | |
2931 | } else { | |
2932 | reg_is_indoor_portid = 0; | |
2933 | } | |
52616f2b | 2934 | |
05050753 | 2935 | spin_unlock(®_indoor_lock); |
52616f2b | 2936 | |
05050753 I |
2937 | if (!is_indoor) |
2938 | reg_check_channels(); | |
52616f2b IP |
2939 | |
2940 | return 0; | |
2941 | } | |
2942 | ||
05050753 I |
2943 | void regulatory_netlink_notify(u32 portid) |
2944 | { | |
2945 | spin_lock(®_indoor_lock); | |
2946 | ||
2947 | if (reg_is_indoor_portid != portid) { | |
2948 | spin_unlock(®_indoor_lock); | |
2949 | return; | |
2950 | } | |
2951 | ||
2952 | reg_is_indoor = false; | |
2953 | reg_is_indoor_portid = 0; | |
2954 | ||
2955 | spin_unlock(®_indoor_lock); | |
2956 | ||
2957 | reg_check_channels(); | |
2958 | } | |
2959 | ||
fe33eb39 LR |
2960 | /* Driver hints */ |
2961 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
2962 | { | |
2963 | struct regulatory_request *request; | |
2964 | ||
fdc9d7b2 JB |
2965 | if (WARN_ON(!alpha2 || !wiphy)) |
2966 | return -EINVAL; | |
fe33eb39 | 2967 | |
4f7b9140 LR |
2968 | wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG; |
2969 | ||
fe33eb39 LR |
2970 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
2971 | if (!request) | |
2972 | return -ENOMEM; | |
2973 | ||
2974 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
2975 | ||
fe33eb39 LR |
2976 | request->alpha2[0] = alpha2[0]; |
2977 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2978 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 | 2979 | |
c37722bd | 2980 | /* Allow calling CRDA again */ |
b6863036 | 2981 | reset_crda_timeouts(); |
c37722bd | 2982 | |
fe33eb39 LR |
2983 | queue_regulatory_request(request); |
2984 | ||
2985 | return 0; | |
b2e1b302 LR |
2986 | } |
2987 | EXPORT_SYMBOL(regulatory_hint); | |
2988 | ||
57fbcce3 | 2989 | void regulatory_hint_country_ie(struct wiphy *wiphy, enum nl80211_band band, |
789fd033 | 2990 | const u8 *country_ie, u8 country_ie_len) |
3f2355cb | 2991 | { |
3f2355cb | 2992 | char alpha2[2]; |
3f2355cb | 2993 | enum environment_cap env = ENVIRON_ANY; |
db2424c5 | 2994 | struct regulatory_request *request = NULL, *lr; |
d335fe63 | 2995 | |
3f2355cb LR |
2996 | /* IE len must be evenly divisible by 2 */ |
2997 | if (country_ie_len & 0x01) | |
db2424c5 | 2998 | return; |
3f2355cb LR |
2999 | |
3000 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
db2424c5 JB |
3001 | return; |
3002 | ||
3003 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
3004 | if (!request) | |
3005 | return; | |
3f2355cb | 3006 | |
3f2355cb LR |
3007 | alpha2[0] = country_ie[0]; |
3008 | alpha2[1] = country_ie[1]; | |
3009 | ||
3010 | if (country_ie[2] == 'I') | |
3011 | env = ENVIRON_INDOOR; | |
3012 | else if (country_ie[2] == 'O') | |
3013 | env = ENVIRON_OUTDOOR; | |
3014 | ||
db2424c5 JB |
3015 | rcu_read_lock(); |
3016 | lr = get_last_request(); | |
3017 | ||
3018 | if (unlikely(!lr)) | |
3019 | goto out; | |
3020 | ||
fb1fc7ad | 3021 | /* |
8b19e6ca | 3022 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc | 3023 | * We leave conflict resolution to the workqueue, where can hold |
5fe231e8 | 3024 | * the RTNL. |
fb1fc7ad | 3025 | */ |
c492db37 JB |
3026 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
3027 | lr->wiphy_idx != WIPHY_IDX_INVALID) | |
4b44c8bc | 3028 | goto out; |
3f2355cb | 3029 | |
fe33eb39 | 3030 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
3031 | request->alpha2[0] = alpha2[0]; |
3032 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 3033 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
3034 | request->country_ie_env = env; |
3035 | ||
c37722bd | 3036 | /* Allow calling CRDA again */ |
b6863036 | 3037 | reset_crda_timeouts(); |
c37722bd | 3038 | |
fe33eb39 | 3039 | queue_regulatory_request(request); |
db2424c5 | 3040 | request = NULL; |
3f2355cb | 3041 | out: |
db2424c5 JB |
3042 | kfree(request); |
3043 | rcu_read_unlock(); | |
3f2355cb | 3044 | } |
b2e1b302 | 3045 | |
09d989d1 LR |
3046 | static void restore_alpha2(char *alpha2, bool reset_user) |
3047 | { | |
3048 | /* indicates there is no alpha2 to consider for restoration */ | |
3049 | alpha2[0] = '9'; | |
3050 | alpha2[1] = '7'; | |
3051 | ||
3052 | /* The user setting has precedence over the module parameter */ | |
3053 | if (is_user_regdom_saved()) { | |
3054 | /* Unless we're asked to ignore it and reset it */ | |
3055 | if (reset_user) { | |
c799ba6e | 3056 | pr_debug("Restoring regulatory settings including user preference\n"); |
09d989d1 LR |
3057 | user_alpha2[0] = '9'; |
3058 | user_alpha2[1] = '7'; | |
3059 | ||
3060 | /* | |
3061 | * If we're ignoring user settings, we still need to | |
3062 | * check the module parameter to ensure we put things | |
3063 | * back as they were for a full restore. | |
3064 | */ | |
3065 | if (!is_world_regdom(ieee80211_regdom)) { | |
c799ba6e JB |
3066 | pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
3067 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
3068 | alpha2[0] = ieee80211_regdom[0]; |
3069 | alpha2[1] = ieee80211_regdom[1]; | |
3070 | } | |
3071 | } else { | |
c799ba6e JB |
3072 | pr_debug("Restoring regulatory settings while preserving user preference for: %c%c\n", |
3073 | user_alpha2[0], user_alpha2[1]); | |
09d989d1 LR |
3074 | alpha2[0] = user_alpha2[0]; |
3075 | alpha2[1] = user_alpha2[1]; | |
3076 | } | |
3077 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
c799ba6e JB |
3078 | pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
3079 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
3080 | alpha2[0] = ieee80211_regdom[0]; |
3081 | alpha2[1] = ieee80211_regdom[1]; | |
3082 | } else | |
c799ba6e | 3083 | pr_debug("Restoring regulatory settings\n"); |
09d989d1 LR |
3084 | } |
3085 | ||
5ce543d1 RM |
3086 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
3087 | { | |
3088 | struct ieee80211_supported_band *sband; | |
57fbcce3 | 3089 | enum nl80211_band band; |
5ce543d1 RM |
3090 | struct ieee80211_channel *chan; |
3091 | int i; | |
3092 | ||
57fbcce3 | 3093 | for (band = 0; band < NUM_NL80211_BANDS; band++) { |
5ce543d1 RM |
3094 | sband = wiphy->bands[band]; |
3095 | if (!sband) | |
3096 | continue; | |
3097 | for (i = 0; i < sband->n_channels; i++) { | |
3098 | chan = &sband->channels[i]; | |
3099 | chan->flags = chan->orig_flags; | |
3100 | chan->max_antenna_gain = chan->orig_mag; | |
3101 | chan->max_power = chan->orig_mpwr; | |
899852af | 3102 | chan->beacon_found = false; |
5ce543d1 RM |
3103 | } |
3104 | } | |
3105 | } | |
3106 | ||
09d989d1 LR |
3107 | /* |
3108 | * Restoring regulatory settings involves ingoring any | |
3109 | * possibly stale country IE information and user regulatory | |
3110 | * settings if so desired, this includes any beacon hints | |
3111 | * learned as we could have traveled outside to another country | |
3112 | * after disconnection. To restore regulatory settings we do | |
3113 | * exactly what we did at bootup: | |
3114 | * | |
3115 | * - send a core regulatory hint | |
3116 | * - send a user regulatory hint if applicable | |
3117 | * | |
3118 | * Device drivers that send a regulatory hint for a specific country | |
3119 | * keep their own regulatory domain on wiphy->regd so that does does | |
3120 | * not need to be remembered. | |
3121 | */ | |
3122 | static void restore_regulatory_settings(bool reset_user) | |
3123 | { | |
3124 | char alpha2[2]; | |
cee0bec5 | 3125 | char world_alpha2[2]; |
09d989d1 | 3126 | struct reg_beacon *reg_beacon, *btmp; |
14609555 | 3127 | LIST_HEAD(tmp_reg_req_list); |
5ce543d1 | 3128 | struct cfg80211_registered_device *rdev; |
09d989d1 | 3129 | |
5fe231e8 JB |
3130 | ASSERT_RTNL(); |
3131 | ||
05050753 I |
3132 | /* |
3133 | * Clear the indoor setting in case that it is not controlled by user | |
3134 | * space, as otherwise there is no guarantee that the device is still | |
3135 | * operating in an indoor environment. | |
3136 | */ | |
3137 | spin_lock(®_indoor_lock); | |
3138 | if (reg_is_indoor && !reg_is_indoor_portid) { | |
3139 | reg_is_indoor = false; | |
3140 | reg_check_channels(); | |
3141 | } | |
3142 | spin_unlock(®_indoor_lock); | |
52616f2b | 3143 | |
2d319867 | 3144 | reset_regdomains(true, &world_regdom); |
09d989d1 LR |
3145 | restore_alpha2(alpha2, reset_user); |
3146 | ||
14609555 LR |
3147 | /* |
3148 | * If there's any pending requests we simply | |
3149 | * stash them to a temporary pending queue and | |
3150 | * add then after we've restored regulatory | |
3151 | * settings. | |
3152 | */ | |
3153 | spin_lock(®_requests_lock); | |
eeca9fce | 3154 | list_splice_tail_init(®_requests_list, &tmp_reg_req_list); |
14609555 LR |
3155 | spin_unlock(®_requests_lock); |
3156 | ||
09d989d1 LR |
3157 | /* Clear beacon hints */ |
3158 | spin_lock_bh(®_pending_beacons_lock); | |
fea9bced JB |
3159 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
3160 | list_del(®_beacon->list); | |
3161 | kfree(reg_beacon); | |
09d989d1 LR |
3162 | } |
3163 | spin_unlock_bh(®_pending_beacons_lock); | |
3164 | ||
fea9bced JB |
3165 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
3166 | list_del(®_beacon->list); | |
3167 | kfree(reg_beacon); | |
09d989d1 LR |
3168 | } |
3169 | ||
3170 | /* First restore to the basic regulatory settings */ | |
379b82f4 JB |
3171 | world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; |
3172 | world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; | |
09d989d1 | 3173 | |
5ce543d1 | 3174 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
b0d7aa59 JD |
3175 | if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) |
3176 | continue; | |
a2f73b6c | 3177 | if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG) |
5ce543d1 RM |
3178 | restore_custom_reg_settings(&rdev->wiphy); |
3179 | } | |
3180 | ||
cee0bec5 | 3181 | regulatory_hint_core(world_alpha2); |
09d989d1 LR |
3182 | |
3183 | /* | |
3184 | * This restores the ieee80211_regdom module parameter | |
3185 | * preference or the last user requested regulatory | |
3186 | * settings, user regulatory settings takes precedence. | |
3187 | */ | |
3188 | if (is_an_alpha2(alpha2)) | |
549cc1c5 | 3189 | regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER); |
09d989d1 | 3190 | |
14609555 | 3191 | spin_lock(®_requests_lock); |
11cff96c | 3192 | list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); |
14609555 LR |
3193 | spin_unlock(®_requests_lock); |
3194 | ||
c799ba6e | 3195 | pr_debug("Kicking the queue\n"); |
14609555 LR |
3196 | |
3197 | schedule_work(®_work); | |
3198 | } | |
09d989d1 | 3199 | |
7417844b RKS |
3200 | static bool is_wiphy_all_set_reg_flag(enum ieee80211_regulatory_flags flag) |
3201 | { | |
3202 | struct cfg80211_registered_device *rdev; | |
3203 | struct wireless_dev *wdev; | |
3204 | ||
3205 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
3206 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { | |
3207 | wdev_lock(wdev); | |
3208 | if (!(wdev->wiphy->regulatory_flags & flag)) { | |
3209 | wdev_unlock(wdev); | |
3210 | return false; | |
3211 | } | |
3212 | wdev_unlock(wdev); | |
3213 | } | |
3214 | } | |
3215 | ||
3216 | return true; | |
3217 | } | |
3218 | ||
09d989d1 LR |
3219 | void regulatory_hint_disconnect(void) |
3220 | { | |
7417844b RKS |
3221 | /* Restore of regulatory settings is not required when wiphy(s) |
3222 | * ignore IE from connected access point but clearance of beacon hints | |
3223 | * is required when wiphy(s) supports beacon hints. | |
3224 | */ | |
3225 | if (is_wiphy_all_set_reg_flag(REGULATORY_COUNTRY_IE_IGNORE)) { | |
3226 | struct reg_beacon *reg_beacon, *btmp; | |
3227 | ||
3228 | if (is_wiphy_all_set_reg_flag(REGULATORY_DISABLE_BEACON_HINTS)) | |
3229 | return; | |
3230 | ||
3231 | spin_lock_bh(®_pending_beacons_lock); | |
3232 | list_for_each_entry_safe(reg_beacon, btmp, | |
3233 | ®_pending_beacons, list) { | |
3234 | list_del(®_beacon->list); | |
3235 | kfree(reg_beacon); | |
3236 | } | |
3237 | spin_unlock_bh(®_pending_beacons_lock); | |
3238 | ||
3239 | list_for_each_entry_safe(reg_beacon, btmp, | |
3240 | ®_beacon_list, list) { | |
3241 | list_del(®_beacon->list); | |
3242 | kfree(reg_beacon); | |
3243 | } | |
3244 | ||
3245 | return; | |
3246 | } | |
3247 | ||
c799ba6e | 3248 | pr_debug("All devices are disconnected, going to restore regulatory settings\n"); |
09d989d1 LR |
3249 | restore_regulatory_settings(false); |
3250 | } | |
3251 | ||
9cf0a0b4 | 3252 | static bool freq_is_chan_12_13_14(u32 freq) |
e38f8a7a | 3253 | { |
57fbcce3 JB |
3254 | if (freq == ieee80211_channel_to_frequency(12, NL80211_BAND_2GHZ) || |
3255 | freq == ieee80211_channel_to_frequency(13, NL80211_BAND_2GHZ) || | |
3256 | freq == ieee80211_channel_to_frequency(14, NL80211_BAND_2GHZ)) | |
e38f8a7a LR |
3257 | return true; |
3258 | return false; | |
3259 | } | |
3260 | ||
3ebfa6e7 LR |
3261 | static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) |
3262 | { | |
3263 | struct reg_beacon *pending_beacon; | |
3264 | ||
3265 | list_for_each_entry(pending_beacon, ®_pending_beacons, list) | |
3266 | if (beacon_chan->center_freq == | |
3267 | pending_beacon->chan.center_freq) | |
3268 | return true; | |
3269 | return false; | |
3270 | } | |
3271 | ||
e38f8a7a LR |
3272 | int regulatory_hint_found_beacon(struct wiphy *wiphy, |
3273 | struct ieee80211_channel *beacon_chan, | |
3274 | gfp_t gfp) | |
3275 | { | |
3276 | struct reg_beacon *reg_beacon; | |
3ebfa6e7 | 3277 | bool processing; |
e38f8a7a | 3278 | |
1a919318 JB |
3279 | if (beacon_chan->beacon_found || |
3280 | beacon_chan->flags & IEEE80211_CHAN_RADAR || | |
57fbcce3 | 3281 | (beacon_chan->band == NL80211_BAND_2GHZ && |
1a919318 | 3282 | !freq_is_chan_12_13_14(beacon_chan->center_freq))) |
e38f8a7a LR |
3283 | return 0; |
3284 | ||
3ebfa6e7 LR |
3285 | spin_lock_bh(®_pending_beacons_lock); |
3286 | processing = pending_reg_beacon(beacon_chan); | |
3287 | spin_unlock_bh(®_pending_beacons_lock); | |
3288 | ||
3289 | if (processing) | |
e38f8a7a LR |
3290 | return 0; |
3291 | ||
3292 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
3293 | if (!reg_beacon) | |
3294 | return -ENOMEM; | |
3295 | ||
c799ba6e JB |
3296 | pr_debug("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", |
3297 | beacon_chan->center_freq, | |
3298 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
3299 | wiphy_name(wiphy)); | |
4113f751 | 3300 | |
e38f8a7a | 3301 | memcpy(®_beacon->chan, beacon_chan, |
1a919318 | 3302 | sizeof(struct ieee80211_channel)); |
e38f8a7a LR |
3303 | |
3304 | /* | |
3305 | * Since we can be called from BH or and non-BH context | |
3306 | * we must use spin_lock_bh() | |
3307 | */ | |
3308 | spin_lock_bh(®_pending_beacons_lock); | |
3309 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
3310 | spin_unlock_bh(®_pending_beacons_lock); | |
3311 | ||
3312 | schedule_work(®_work); | |
3313 | ||
3314 | return 0; | |
3315 | } | |
3316 | ||
a3d2eaf0 | 3317 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
3318 | { |
3319 | unsigned int i; | |
a3d2eaf0 JB |
3320 | const struct ieee80211_reg_rule *reg_rule = NULL; |
3321 | const struct ieee80211_freq_range *freq_range = NULL; | |
3322 | const struct ieee80211_power_rule *power_rule = NULL; | |
089027e5 | 3323 | char bw[32], cac_time[32]; |
b2e1b302 | 3324 | |
94c4fd64 | 3325 | pr_debug(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n"); |
b2e1b302 LR |
3326 | |
3327 | for (i = 0; i < rd->n_reg_rules; i++) { | |
3328 | reg_rule = &rd->reg_rules[i]; | |
3329 | freq_range = ®_rule->freq_range; | |
3330 | power_rule = ®_rule->power_rule; | |
3331 | ||
b0dfd2ea JD |
3332 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
3333 | snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", | |
3334 | freq_range->max_bandwidth_khz, | |
97524820 JD |
3335 | reg_get_max_bandwidth(rd, reg_rule)); |
3336 | else | |
b0dfd2ea | 3337 | snprintf(bw, sizeof(bw), "%d KHz", |
97524820 JD |
3338 | freq_range->max_bandwidth_khz); |
3339 | ||
089027e5 JD |
3340 | if (reg_rule->flags & NL80211_RRF_DFS) |
3341 | scnprintf(cac_time, sizeof(cac_time), "%u s", | |
3342 | reg_rule->dfs_cac_ms/1000); | |
3343 | else | |
3344 | scnprintf(cac_time, sizeof(cac_time), "N/A"); | |
3345 | ||
3346 | ||
fb1fc7ad LR |
3347 | /* |
3348 | * There may not be documentation for max antenna gain | |
3349 | * in certain regions | |
3350 | */ | |
b2e1b302 | 3351 | if (power_rule->max_antenna_gain) |
94c4fd64 | 3352 | pr_debug(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n", |
b2e1b302 LR |
3353 | freq_range->start_freq_khz, |
3354 | freq_range->end_freq_khz, | |
97524820 | 3355 | bw, |
b2e1b302 | 3356 | power_rule->max_antenna_gain, |
089027e5 JD |
3357 | power_rule->max_eirp, |
3358 | cac_time); | |
b2e1b302 | 3359 | else |
94c4fd64 | 3360 | pr_debug(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n", |
b2e1b302 LR |
3361 | freq_range->start_freq_khz, |
3362 | freq_range->end_freq_khz, | |
97524820 | 3363 | bw, |
089027e5 JD |
3364 | power_rule->max_eirp, |
3365 | cac_time); | |
b2e1b302 LR |
3366 | } |
3367 | } | |
3368 | ||
4c7d3982 | 3369 | bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region) |
8b60b078 LR |
3370 | { |
3371 | switch (dfs_region) { | |
3372 | case NL80211_DFS_UNSET: | |
3373 | case NL80211_DFS_FCC: | |
3374 | case NL80211_DFS_ETSI: | |
3375 | case NL80211_DFS_JP: | |
3376 | return true; | |
3377 | default: | |
4a22b00b | 3378 | pr_debug("Ignoring unknown DFS master region: %d\n", dfs_region); |
8b60b078 LR |
3379 | return false; |
3380 | } | |
3381 | } | |
3382 | ||
a3d2eaf0 | 3383 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 | 3384 | { |
c492db37 | 3385 | struct regulatory_request *lr = get_last_request(); |
b2e1b302 | 3386 | |
3f2355cb | 3387 | if (is_intersected_alpha2(rd->alpha2)) { |
c492db37 | 3388 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
79c97e97 | 3389 | struct cfg80211_registered_device *rdev; |
c492db37 | 3390 | rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); |
79c97e97 | 3391 | if (rdev) { |
94c4fd64 | 3392 | pr_debug("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
3393 | rdev->country_ie_alpha2[0], |
3394 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 3395 | } else |
94c4fd64 | 3396 | pr_debug("Current regulatory domain intersected:\n"); |
3f2355cb | 3397 | } else |
94c4fd64 | 3398 | pr_debug("Current regulatory domain intersected:\n"); |
1a919318 | 3399 | } else if (is_world_regdom(rd->alpha2)) { |
94c4fd64 | 3400 | pr_debug("World regulatory domain updated:\n"); |
1a919318 | 3401 | } else { |
b2e1b302 | 3402 | if (is_unknown_alpha2(rd->alpha2)) |
94c4fd64 | 3403 | pr_debug("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 | 3404 | else { |
c492db37 | 3405 | if (reg_request_cell_base(lr)) |
94c4fd64 | 3406 | pr_debug("Regulatory domain changed to country: %c%c by Cell Station\n", |
57b5ce07 LR |
3407 | rd->alpha2[0], rd->alpha2[1]); |
3408 | else | |
94c4fd64 | 3409 | pr_debug("Regulatory domain changed to country: %c%c\n", |
57b5ce07 LR |
3410 | rd->alpha2[0], rd->alpha2[1]); |
3411 | } | |
b2e1b302 | 3412 | } |
1a919318 | 3413 | |
94c4fd64 | 3414 | pr_debug(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region)); |
b2e1b302 LR |
3415 | print_rd_rules(rd); |
3416 | } | |
3417 | ||
2df78167 | 3418 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 3419 | { |
94c4fd64 | 3420 | pr_debug("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
3421 | print_rd_rules(rd); |
3422 | } | |
3423 | ||
3b9e5aca LR |
3424 | static int reg_set_rd_core(const struct ieee80211_regdomain *rd) |
3425 | { | |
3426 | if (!is_world_regdom(rd->alpha2)) | |
3427 | return -EINVAL; | |
3428 | update_world_regdomain(rd); | |
3429 | return 0; | |
3430 | } | |
3431 | ||
84721d44 LR |
3432 | static int reg_set_rd_user(const struct ieee80211_regdomain *rd, |
3433 | struct regulatory_request *user_request) | |
3434 | { | |
3435 | const struct ieee80211_regdomain *intersected_rd = NULL; | |
3436 | ||
84721d44 LR |
3437 | if (!regdom_changes(rd->alpha2)) |
3438 | return -EALREADY; | |
3439 | ||
3440 | if (!is_valid_rd(rd)) { | |
94c4fd64 DY |
3441 | pr_err("Invalid regulatory domain detected: %c%c\n", |
3442 | rd->alpha2[0], rd->alpha2[1]); | |
84721d44 LR |
3443 | print_regdomain_info(rd); |
3444 | return -EINVAL; | |
3445 | } | |
3446 | ||
3447 | if (!user_request->intersect) { | |
3448 | reset_regdomains(false, rd); | |
3449 | return 0; | |
3450 | } | |
3451 | ||
3452 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); | |
3453 | if (!intersected_rd) | |
3454 | return -EINVAL; | |
3455 | ||
3456 | kfree(rd); | |
3457 | rd = NULL; | |
3458 | reset_regdomains(false, intersected_rd); | |
3459 | ||
3460 | return 0; | |
3461 | } | |
3462 | ||
f5fe3247 LR |
3463 | static int reg_set_rd_driver(const struct ieee80211_regdomain *rd, |
3464 | struct regulatory_request *driver_request) | |
b2e1b302 | 3465 | { |
e9763c3c | 3466 | const struct ieee80211_regdomain *regd; |
9c96477d | 3467 | const struct ieee80211_regdomain *intersected_rd = NULL; |
f5fe3247 | 3468 | const struct ieee80211_regdomain *tmp; |
806a9e39 | 3469 | struct wiphy *request_wiphy; |
6913b49a | 3470 | |
f5fe3247 | 3471 | if (is_world_regdom(rd->alpha2)) |
b2e1b302 LR |
3472 | return -EINVAL; |
3473 | ||
f5fe3247 LR |
3474 | if (!regdom_changes(rd->alpha2)) |
3475 | return -EALREADY; | |
b2e1b302 | 3476 | |
8375af3b | 3477 | if (!is_valid_rd(rd)) { |
94c4fd64 DY |
3478 | pr_err("Invalid regulatory domain detected: %c%c\n", |
3479 | rd->alpha2[0], rd->alpha2[1]); | |
8375af3b LR |
3480 | print_regdomain_info(rd); |
3481 | return -EINVAL; | |
b2e1b302 LR |
3482 | } |
3483 | ||
f5fe3247 | 3484 | request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx); |
922ec58c | 3485 | if (!request_wiphy) |
de3584bd | 3486 | return -ENODEV; |
806a9e39 | 3487 | |
f5fe3247 | 3488 | if (!driver_request->intersect) { |
558f6d32 LR |
3489 | if (request_wiphy->regd) |
3490 | return -EALREADY; | |
3e0c3ff3 | 3491 | |
e9763c3c JB |
3492 | regd = reg_copy_regd(rd); |
3493 | if (IS_ERR(regd)) | |
3494 | return PTR_ERR(regd); | |
3e0c3ff3 | 3495 | |
458f4f9e | 3496 | rcu_assign_pointer(request_wiphy->regd, regd); |
379b82f4 | 3497 | reset_regdomains(false, rd); |
b8295acd LR |
3498 | return 0; |
3499 | } | |
3500 | ||
f5fe3247 LR |
3501 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); |
3502 | if (!intersected_rd) | |
3503 | return -EINVAL; | |
b8295acd | 3504 | |
f5fe3247 LR |
3505 | /* |
3506 | * We can trash what CRDA provided now. | |
3507 | * However if a driver requested this specific regulatory | |
3508 | * domain we keep it for its private use | |
3509 | */ | |
3510 | tmp = get_wiphy_regdom(request_wiphy); | |
3511 | rcu_assign_pointer(request_wiphy->regd, rd); | |
3512 | rcu_free_regdom(tmp); | |
b8295acd | 3513 | |
f5fe3247 | 3514 | rd = NULL; |
b7566fc3 | 3515 | |
f5fe3247 | 3516 | reset_regdomains(false, intersected_rd); |
3e0c3ff3 | 3517 | |
f5fe3247 LR |
3518 | return 0; |
3519 | } | |
3520 | ||
01992406 LR |
3521 | static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd, |
3522 | struct regulatory_request *country_ie_request) | |
f5fe3247 LR |
3523 | { |
3524 | struct wiphy *request_wiphy; | |
b8295acd | 3525 | |
f5fe3247 LR |
3526 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && |
3527 | !is_unknown_alpha2(rd->alpha2)) | |
3528 | return -EINVAL; | |
b8295acd | 3529 | |
f5fe3247 LR |
3530 | /* |
3531 | * Lets only bother proceeding on the same alpha2 if the current | |
3532 | * rd is non static (it means CRDA was present and was used last) | |
3533 | * and the pending request came in from a country IE | |
3534 | */ | |
3535 | ||
3536 | if (!is_valid_rd(rd)) { | |
94c4fd64 DY |
3537 | pr_err("Invalid regulatory domain detected: %c%c\n", |
3538 | rd->alpha2[0], rd->alpha2[1]); | |
f5fe3247 LR |
3539 | print_regdomain_info(rd); |
3540 | return -EINVAL; | |
9c96477d LR |
3541 | } |
3542 | ||
01992406 | 3543 | request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx); |
922ec58c | 3544 | if (!request_wiphy) |
f5fe3247 | 3545 | return -ENODEV; |
b2e1b302 | 3546 | |
01992406 | 3547 | if (country_ie_request->intersect) |
f5fe3247 LR |
3548 | return -EINVAL; |
3549 | ||
3550 | reset_regdomains(false, rd); | |
3551 | return 0; | |
3552 | } | |
b2e1b302 | 3553 | |
fb1fc7ad LR |
3554 | /* |
3555 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 3556 | * multiple drivers can be ironed out later. Caller must've already |
458f4f9e | 3557 | * kmalloc'd the rd structure. |
fb1fc7ad | 3558 | */ |
c37722bd I |
3559 | int set_regdom(const struct ieee80211_regdomain *rd, |
3560 | enum ieee80211_regd_source regd_src) | |
b2e1b302 | 3561 | { |
c492db37 | 3562 | struct regulatory_request *lr; |
092008ab | 3563 | bool user_reset = false; |
b2e1b302 LR |
3564 | int r; |
3565 | ||
3b9e5aca LR |
3566 | if (!reg_is_valid_request(rd->alpha2)) { |
3567 | kfree(rd); | |
3568 | return -EINVAL; | |
3569 | } | |
3570 | ||
c37722bd | 3571 | if (regd_src == REGD_SOURCE_CRDA) |
b6863036 | 3572 | reset_crda_timeouts(); |
c37722bd | 3573 | |
c492db37 | 3574 | lr = get_last_request(); |
abc7381b | 3575 | |
b2e1b302 | 3576 | /* Note that this doesn't update the wiphys, this is done below */ |
3b9e5aca LR |
3577 | switch (lr->initiator) { |
3578 | case NL80211_REGDOM_SET_BY_CORE: | |
3579 | r = reg_set_rd_core(rd); | |
3580 | break; | |
3581 | case NL80211_REGDOM_SET_BY_USER: | |
84721d44 | 3582 | r = reg_set_rd_user(rd, lr); |
092008ab | 3583 | user_reset = true; |
84721d44 | 3584 | break; |
3b9e5aca | 3585 | case NL80211_REGDOM_SET_BY_DRIVER: |
f5fe3247 LR |
3586 | r = reg_set_rd_driver(rd, lr); |
3587 | break; | |
3b9e5aca | 3588 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
01992406 | 3589 | r = reg_set_rd_country_ie(rd, lr); |
3b9e5aca LR |
3590 | break; |
3591 | default: | |
3592 | WARN(1, "invalid initiator %d\n", lr->initiator); | |
09d11800 | 3593 | kfree(rd); |
3b9e5aca LR |
3594 | return -EINVAL; |
3595 | } | |
3596 | ||
d2372b31 | 3597 | if (r) { |
092008ab JD |
3598 | switch (r) { |
3599 | case -EALREADY: | |
95908535 | 3600 | reg_set_request_processed(); |
092008ab JD |
3601 | break; |
3602 | default: | |
3603 | /* Back to world regulatory in case of errors */ | |
3604 | restore_regulatory_settings(user_reset); | |
3605 | } | |
95908535 | 3606 | |
d2372b31 | 3607 | kfree(rd); |
38fd2143 | 3608 | return r; |
d2372b31 | 3609 | } |
b2e1b302 | 3610 | |
b2e1b302 | 3611 | /* This would make this whole thing pointless */ |
38fd2143 JB |
3612 | if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) |
3613 | return -EINVAL; | |
b2e1b302 LR |
3614 | |
3615 | /* update all wiphys now with the new established regulatory domain */ | |
c492db37 | 3616 | update_all_wiphy_regulatory(lr->initiator); |
b2e1b302 | 3617 | |
458f4f9e | 3618 | print_regdomain(get_cfg80211_regdom()); |
b2e1b302 | 3619 | |
c492db37 | 3620 | nl80211_send_reg_change_event(lr); |
73d54c9e | 3621 | |
b2e253cf LR |
3622 | reg_set_request_processed(); |
3623 | ||
38fd2143 | 3624 | return 0; |
b2e1b302 LR |
3625 | } |
3626 | ||
2c3e861c AN |
3627 | static int __regulatory_set_wiphy_regd(struct wiphy *wiphy, |
3628 | struct ieee80211_regdomain *rd) | |
b0d7aa59 JD |
3629 | { |
3630 | const struct ieee80211_regdomain *regd; | |
3631 | const struct ieee80211_regdomain *prev_regd; | |
3632 | struct cfg80211_registered_device *rdev; | |
3633 | ||
3634 | if (WARN_ON(!wiphy || !rd)) | |
3635 | return -EINVAL; | |
3636 | ||
3637 | if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED), | |
3638 | "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n")) | |
3639 | return -EPERM; | |
3640 | ||
3641 | if (WARN(!is_valid_rd(rd), "Invalid regulatory domain detected\n")) { | |
3642 | print_regdomain_info(rd); | |
3643 | return -EINVAL; | |
3644 | } | |
3645 | ||
3646 | regd = reg_copy_regd(rd); | |
3647 | if (IS_ERR(regd)) | |
3648 | return PTR_ERR(regd); | |
3649 | ||
3650 | rdev = wiphy_to_rdev(wiphy); | |
3651 | ||
3652 | spin_lock(®_requests_lock); | |
3653 | prev_regd = rdev->requested_regd; | |
3654 | rdev->requested_regd = regd; | |
3655 | spin_unlock(®_requests_lock); | |
3656 | ||
3657 | kfree(prev_regd); | |
2c3e861c AN |
3658 | return 0; |
3659 | } | |
3660 | ||
3661 | int regulatory_set_wiphy_regd(struct wiphy *wiphy, | |
3662 | struct ieee80211_regdomain *rd) | |
3663 | { | |
3664 | int ret = __regulatory_set_wiphy_regd(wiphy, rd); | |
3665 | ||
3666 | if (ret) | |
3667 | return ret; | |
b0d7aa59 JD |
3668 | |
3669 | schedule_work(®_work); | |
3670 | return 0; | |
3671 | } | |
3672 | EXPORT_SYMBOL(regulatory_set_wiphy_regd); | |
3673 | ||
2c3e861c AN |
3674 | int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy *wiphy, |
3675 | struct ieee80211_regdomain *rd) | |
3676 | { | |
3677 | int ret; | |
3678 | ||
3679 | ASSERT_RTNL(); | |
3680 | ||
3681 | ret = __regulatory_set_wiphy_regd(wiphy, rd); | |
3682 | if (ret) | |
3683 | return ret; | |
3684 | ||
3685 | /* process the request immediately */ | |
3686 | reg_process_self_managed_hints(); | |
3687 | return 0; | |
3688 | } | |
3689 | EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl); | |
3690 | ||
57b5ce07 LR |
3691 | void wiphy_regulatory_register(struct wiphy *wiphy) |
3692 | { | |
aced43ce | 3693 | struct regulatory_request *lr = get_last_request(); |
23df0b73 | 3694 | |
aced43ce AS |
3695 | /* self-managed devices ignore beacon hints and country IE */ |
3696 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) { | |
b0d7aa59 JD |
3697 | wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS | |
3698 | REGULATORY_COUNTRY_IE_IGNORE; | |
3699 | ||
aced43ce AS |
3700 | /* |
3701 | * The last request may have been received before this | |
3702 | * registration call. Call the driver notifier if | |
3703 | * initiator is USER and user type is CELL_BASE. | |
3704 | */ | |
3705 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER && | |
3706 | lr->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE) | |
3707 | reg_call_notifier(wiphy, lr); | |
3708 | } | |
3709 | ||
57b5ce07 LR |
3710 | if (!reg_dev_ignore_cell_hint(wiphy)) |
3711 | reg_num_devs_support_basehint++; | |
3712 | ||
23df0b73 | 3713 | wiphy_update_regulatory(wiphy, lr->initiator); |
89766727 | 3714 | wiphy_all_share_dfs_chan_state(wiphy); |
57b5ce07 LR |
3715 | } |
3716 | ||
bfead080 | 3717 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 3718 | { |
0ad8acaf | 3719 | struct wiphy *request_wiphy = NULL; |
c492db37 | 3720 | struct regulatory_request *lr; |
761cf7ec | 3721 | |
c492db37 | 3722 | lr = get_last_request(); |
abc7381b | 3723 | |
57b5ce07 LR |
3724 | if (!reg_dev_ignore_cell_hint(wiphy)) |
3725 | reg_num_devs_support_basehint--; | |
3726 | ||
458f4f9e | 3727 | rcu_free_regdom(get_wiphy_regdom(wiphy)); |
34dd886c | 3728 | RCU_INIT_POINTER(wiphy->regd, NULL); |
0ef9ccdd | 3729 | |
c492db37 JB |
3730 | if (lr) |
3731 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
806a9e39 | 3732 | |
0ef9ccdd | 3733 | if (!request_wiphy || request_wiphy != wiphy) |
38fd2143 | 3734 | return; |
0ef9ccdd | 3735 | |
c492db37 JB |
3736 | lr->wiphy_idx = WIPHY_IDX_INVALID; |
3737 | lr->country_ie_env = ENVIRON_ANY; | |
3f2355cb LR |
3738 | } |
3739 | ||
174e0cd2 IP |
3740 | /* |
3741 | * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for | |
3742 | * UNII band definitions | |
3743 | */ | |
3744 | int cfg80211_get_unii(int freq) | |
3745 | { | |
3746 | /* UNII-1 */ | |
3747 | if (freq >= 5150 && freq <= 5250) | |
3748 | return 0; | |
3749 | ||
3750 | /* UNII-2A */ | |
3751 | if (freq > 5250 && freq <= 5350) | |
3752 | return 1; | |
3753 | ||
3754 | /* UNII-2B */ | |
3755 | if (freq > 5350 && freq <= 5470) | |
3756 | return 2; | |
3757 | ||
3758 | /* UNII-2C */ | |
3759 | if (freq > 5470 && freq <= 5725) | |
3760 | return 3; | |
3761 | ||
3762 | /* UNII-3 */ | |
3763 | if (freq > 5725 && freq <= 5825) | |
3764 | return 4; | |
3765 | ||
3766 | return -EINVAL; | |
3767 | } | |
3768 | ||
c8866e55 IP |
3769 | bool regulatory_indoor_allowed(void) |
3770 | { | |
3771 | return reg_is_indoor; | |
3772 | } | |
3773 | ||
b35a51c7 VT |
3774 | bool regulatory_pre_cac_allowed(struct wiphy *wiphy) |
3775 | { | |
3776 | const struct ieee80211_regdomain *regd = NULL; | |
3777 | const struct ieee80211_regdomain *wiphy_regd = NULL; | |
3778 | bool pre_cac_allowed = false; | |
3779 | ||
3780 | rcu_read_lock(); | |
3781 | ||
3782 | regd = rcu_dereference(cfg80211_regdomain); | |
3783 | wiphy_regd = rcu_dereference(wiphy->regd); | |
3784 | if (!wiphy_regd) { | |
3785 | if (regd->dfs_region == NL80211_DFS_ETSI) | |
3786 | pre_cac_allowed = true; | |
3787 | ||
3788 | rcu_read_unlock(); | |
3789 | ||
3790 | return pre_cac_allowed; | |
3791 | } | |
3792 | ||
3793 | if (regd->dfs_region == wiphy_regd->dfs_region && | |
3794 | wiphy_regd->dfs_region == NL80211_DFS_ETSI) | |
3795 | pre_cac_allowed = true; | |
3796 | ||
3797 | rcu_read_unlock(); | |
3798 | ||
3799 | return pre_cac_allowed; | |
3800 | } | |
3801 | ||
89766727 VT |
3802 | void regulatory_propagate_dfs_state(struct wiphy *wiphy, |
3803 | struct cfg80211_chan_def *chandef, | |
3804 | enum nl80211_dfs_state dfs_state, | |
3805 | enum nl80211_radar_event event) | |
3806 | { | |
3807 | struct cfg80211_registered_device *rdev; | |
3808 | ||
3809 | ASSERT_RTNL(); | |
3810 | ||
3811 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
3812 | return; | |
3813 | ||
89766727 VT |
3814 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
3815 | if (wiphy == &rdev->wiphy) | |
3816 | continue; | |
3817 | ||
3818 | if (!reg_dfs_domain_same(wiphy, &rdev->wiphy)) | |
3819 | continue; | |
3820 | ||
3821 | if (!ieee80211_get_channel(&rdev->wiphy, | |
3822 | chandef->chan->center_freq)) | |
3823 | continue; | |
3824 | ||
3825 | cfg80211_set_dfs_state(&rdev->wiphy, chandef, dfs_state); | |
3826 | ||
3827 | if (event == NL80211_RADAR_DETECTED || | |
3828 | event == NL80211_RADAR_CAC_FINISHED) | |
3829 | cfg80211_sched_dfs_chan_update(rdev); | |
3830 | ||
3831 | nl80211_radar_notify(rdev, chandef, event, NULL, GFP_KERNEL); | |
3832 | } | |
3833 | } | |
3834 | ||
d7be102f | 3835 | static int __init regulatory_init_db(void) |
b2e1b302 | 3836 | { |
d7be102f | 3837 | int err; |
734366de | 3838 | |
71e5e886 JB |
3839 | /* |
3840 | * It's possible that - due to other bugs/issues - cfg80211 | |
3841 | * never called regulatory_init() below, or that it failed; | |
3842 | * in that case, don't try to do any further work here as | |
3843 | * it's doomed to lead to crashes. | |
3844 | */ | |
3845 | if (IS_ERR_OR_NULL(reg_pdev)) | |
3846 | return -EINVAL; | |
3847 | ||
90a53e44 JB |
3848 | err = load_builtin_regdb_keys(); |
3849 | if (err) | |
3850 | return err; | |
3851 | ||
ae9e4b0d | 3852 | /* We always try to get an update for the static regdomain */ |
458f4f9e | 3853 | err = regulatory_hint_core(cfg80211_world_regdom->alpha2); |
ba25c141 | 3854 | if (err) { |
09d11800 OO |
3855 | if (err == -ENOMEM) { |
3856 | platform_device_unregister(reg_pdev); | |
bcf4f99b | 3857 | return err; |
09d11800 | 3858 | } |
bcf4f99b LR |
3859 | /* |
3860 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
3861 | * memory which is handled and propagated appropriately above | |
3862 | * but it can also fail during a netlink_broadcast() or during | |
3863 | * early boot for call_usermodehelper(). For now treat these | |
3864 | * errors as non-fatal. | |
3865 | */ | |
e9c0268f | 3866 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b | 3867 | } |
734366de | 3868 | |
ae9e4b0d LR |
3869 | /* |
3870 | * Finally, if the user set the module parameter treat it | |
3871 | * as a user hint. | |
3872 | */ | |
3873 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
3874 | regulatory_hint_user(ieee80211_regdom, |
3875 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 3876 | |
b2e1b302 LR |
3877 | return 0; |
3878 | } | |
d7be102f JB |
3879 | #ifndef MODULE |
3880 | late_initcall(regulatory_init_db); | |
3881 | #endif | |
3882 | ||
3883 | int __init regulatory_init(void) | |
3884 | { | |
3885 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); | |
3886 | if (IS_ERR(reg_pdev)) | |
3887 | return PTR_ERR(reg_pdev); | |
3888 | ||
3889 | spin_lock_init(®_requests_lock); | |
3890 | spin_lock_init(®_pending_beacons_lock); | |
3891 | spin_lock_init(®_indoor_lock); | |
3892 | ||
3893 | rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); | |
3894 | ||
3895 | user_alpha2[0] = '9'; | |
3896 | user_alpha2[1] = '7'; | |
3897 | ||
3898 | #ifdef MODULE | |
3899 | return regulatory_init_db(); | |
3900 | #else | |
3901 | return 0; | |
3902 | #endif | |
3903 | } | |
b2e1b302 | 3904 | |
1a919318 | 3905 | void regulatory_exit(void) |
b2e1b302 | 3906 | { |
fe33eb39 | 3907 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 3908 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
3909 | |
3910 | cancel_work_sync(®_work); | |
b6863036 | 3911 | cancel_crda_timeout_sync(); |
ad932f04 | 3912 | cancel_delayed_work_sync(®_check_chans); |
fe33eb39 | 3913 | |
9027b149 | 3914 | /* Lock to suppress warnings */ |
38fd2143 | 3915 | rtnl_lock(); |
379b82f4 | 3916 | reset_regdomains(true, NULL); |
38fd2143 | 3917 | rtnl_unlock(); |
734366de | 3918 | |
58ebacc6 | 3919 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 3920 | |
b2e1b302 | 3921 | platform_device_unregister(reg_pdev); |
734366de | 3922 | |
fea9bced JB |
3923 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
3924 | list_del(®_beacon->list); | |
3925 | kfree(reg_beacon); | |
e38f8a7a | 3926 | } |
e38f8a7a | 3927 | |
fea9bced JB |
3928 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
3929 | list_del(®_beacon->list); | |
3930 | kfree(reg_beacon); | |
e38f8a7a LR |
3931 | } |
3932 | ||
fea9bced JB |
3933 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
3934 | list_del(®_request->list); | |
3935 | kfree(reg_request); | |
fe33eb39 | 3936 | } |
007f6c5e JB |
3937 | |
3938 | if (!IS_ERR_OR_NULL(regdb)) | |
3939 | kfree(regdb); | |
90a53e44 JB |
3940 | |
3941 | free_regdb_keyring(); | |
8318d78a | 3942 | } |