]>
Commit | Line | Data |
---|---|---|
8318d78a JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
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 |
8318d78a | 8 | * |
3b77d5ec LR |
9 | * Permission to use, copy, modify, and/or distribute this software for any |
10 | * purpose with or without fee is hereby granted, provided that the above | |
11 | * copyright notice and this permission notice appear in all copies. | |
12 | * | |
13 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
14 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
15 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
16 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
17 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
18 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
19 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
8318d78a JB |
20 | */ |
21 | ||
3b77d5ec | 22 | |
b2e1b302 LR |
23 | /** |
24 | * DOC: Wireless regulatory infrastructure | |
8318d78a JB |
25 | * |
26 | * The usual implementation is for a driver to read a device EEPROM to | |
27 | * determine which regulatory domain it should be operating under, then | |
28 | * looking up the allowable channels in a driver-local table and finally | |
29 | * registering those channels in the wiphy structure. | |
30 | * | |
b2e1b302 LR |
31 | * Another set of compliance enforcement is for drivers to use their |
32 | * own compliance limits which can be stored on the EEPROM. The host | |
33 | * driver or firmware may ensure these are used. | |
34 | * | |
35 | * In addition to all this we provide an extra layer of regulatory | |
36 | * conformance. For drivers which do not have any regulatory | |
37 | * information CRDA provides the complete regulatory solution. | |
38 | * For others it provides a community effort on further restrictions | |
39 | * to enhance compliance. | |
40 | * | |
41 | * Note: When number of rules --> infinity we will not be able to | |
42 | * index on alpha2 any more, instead we'll probably have to | |
43 | * rely on some SHA1 checksum of the regdomain for example. | |
44 | * | |
8318d78a | 45 | */ |
e9c0268f JP |
46 | |
47 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
48 | ||
8318d78a | 49 | #include <linux/kernel.h> |
bc3b2d7f | 50 | #include <linux/export.h> |
5a0e3ad6 | 51 | #include <linux/slab.h> |
b2e1b302 | 52 | #include <linux/list.h> |
c61029c7 | 53 | #include <linux/ctype.h> |
b2e1b302 LR |
54 | #include <linux/nl80211.h> |
55 | #include <linux/platform_device.h> | |
d9b93842 | 56 | #include <linux/moduleparam.h> |
007f6c5e | 57 | #include <linux/firmware.h> |
b2e1b302 | 58 | #include <net/cfg80211.h> |
8318d78a | 59 | #include "core.h" |
b2e1b302 | 60 | #include "reg.h" |
ad932f04 | 61 | #include "rdev-ops.h" |
73d54c9e | 62 | #include "nl80211.h" |
8318d78a | 63 | |
ad932f04 AN |
64 | /* |
65 | * Grace period we give before making sure all current interfaces reside on | |
66 | * channels allowed by the current regulatory domain. | |
67 | */ | |
68 | #define REG_ENFORCE_GRACE_MS 60000 | |
69 | ||
52616f2b IP |
70 | /** |
71 | * enum reg_request_treatment - regulatory request treatment | |
72 | * | |
73 | * @REG_REQ_OK: continue processing the regulatory request | |
74 | * @REG_REQ_IGNORE: ignore the regulatory request | |
75 | * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should | |
76 | * be intersected with the current one. | |
77 | * @REG_REQ_ALREADY_SET: the regulatory request will not change the current | |
78 | * regulatory settings, and no further processing is required. | |
52616f2b | 79 | */ |
2f92212b JB |
80 | enum reg_request_treatment { |
81 | REG_REQ_OK, | |
82 | REG_REQ_IGNORE, | |
83 | REG_REQ_INTERSECT, | |
84 | REG_REQ_ALREADY_SET, | |
85 | }; | |
86 | ||
a042994d LR |
87 | static struct regulatory_request core_request_world = { |
88 | .initiator = NL80211_REGDOM_SET_BY_CORE, | |
89 | .alpha2[0] = '0', | |
90 | .alpha2[1] = '0', | |
91 | .intersect = false, | |
92 | .processed = true, | |
93 | .country_ie_env = ENVIRON_ANY, | |
94 | }; | |
95 | ||
38fd2143 JB |
96 | /* |
97 | * Receipt of information from last regulatory request, | |
98 | * protected by RTNL (and can be accessed with RCU protection) | |
99 | */ | |
c492db37 | 100 | static struct regulatory_request __rcu *last_request = |
cec3f0ed | 101 | (void __force __rcu *)&core_request_world; |
734366de | 102 | |
007f6c5e | 103 | /* To trigger userspace events and load firmware */ |
b2e1b302 | 104 | static struct platform_device *reg_pdev; |
8318d78a | 105 | |
fb1fc7ad LR |
106 | /* |
107 | * Central wireless core regulatory domains, we only need two, | |
734366de | 108 | * the current one and a world regulatory domain in case we have no |
e8da2bb4 | 109 | * information to give us an alpha2. |
38fd2143 | 110 | * (protected by RTNL, can be read under RCU) |
fb1fc7ad | 111 | */ |
458f4f9e | 112 | const struct ieee80211_regdomain __rcu *cfg80211_regdomain; |
734366de | 113 | |
57b5ce07 LR |
114 | /* |
115 | * Number of devices that registered to the core | |
116 | * that support cellular base station regulatory hints | |
38fd2143 | 117 | * (protected by RTNL) |
57b5ce07 LR |
118 | */ |
119 | static int reg_num_devs_support_basehint; | |
120 | ||
52616f2b IP |
121 | /* |
122 | * State variable indicating if the platform on which the devices | |
123 | * are attached is operating in an indoor environment. The state variable | |
124 | * is relevant for all registered devices. | |
52616f2b IP |
125 | */ |
126 | static bool reg_is_indoor; | |
05050753 I |
127 | static spinlock_t reg_indoor_lock; |
128 | ||
129 | /* Used to track the userspace process controlling the indoor setting */ | |
130 | static u32 reg_is_indoor_portid; | |
52616f2b | 131 | |
b6863036 | 132 | static void restore_regulatory_settings(bool reset_user); |
c37722bd | 133 | |
458f4f9e JB |
134 | static const struct ieee80211_regdomain *get_cfg80211_regdom(void) |
135 | { | |
38fd2143 | 136 | return rtnl_dereference(cfg80211_regdomain); |
458f4f9e JB |
137 | } |
138 | ||
ad30ca2c | 139 | const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) |
458f4f9e | 140 | { |
38fd2143 | 141 | return rtnl_dereference(wiphy->regd); |
458f4f9e JB |
142 | } |
143 | ||
3ef121b5 LR |
144 | static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region) |
145 | { | |
146 | switch (dfs_region) { | |
147 | case NL80211_DFS_UNSET: | |
148 | return "unset"; | |
149 | case NL80211_DFS_FCC: | |
150 | return "FCC"; | |
151 | case NL80211_DFS_ETSI: | |
152 | return "ETSI"; | |
153 | case NL80211_DFS_JP: | |
154 | return "JP"; | |
155 | } | |
156 | return "Unknown"; | |
157 | } | |
158 | ||
6c474799 LR |
159 | enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy) |
160 | { | |
161 | const struct ieee80211_regdomain *regd = NULL; | |
162 | const struct ieee80211_regdomain *wiphy_regd = NULL; | |
163 | ||
164 | regd = get_cfg80211_regdom(); | |
165 | if (!wiphy) | |
166 | goto out; | |
167 | ||
168 | wiphy_regd = get_wiphy_regdom(wiphy); | |
169 | if (!wiphy_regd) | |
170 | goto out; | |
171 | ||
172 | if (wiphy_regd->dfs_region == regd->dfs_region) | |
173 | goto out; | |
174 | ||
c799ba6e JB |
175 | pr_debug("%s: device specific dfs_region (%s) disagrees with cfg80211's central dfs_region (%s)\n", |
176 | dev_name(&wiphy->dev), | |
177 | reg_dfs_region_str(wiphy_regd->dfs_region), | |
178 | reg_dfs_region_str(regd->dfs_region)); | |
6c474799 LR |
179 | |
180 | out: | |
181 | return regd->dfs_region; | |
182 | } | |
183 | ||
458f4f9e JB |
184 | static void rcu_free_regdom(const struct ieee80211_regdomain *r) |
185 | { | |
186 | if (!r) | |
187 | return; | |
188 | kfree_rcu((struct ieee80211_regdomain *)r, rcu_head); | |
189 | } | |
190 | ||
c492db37 JB |
191 | static struct regulatory_request *get_last_request(void) |
192 | { | |
38fd2143 | 193 | return rcu_dereference_rtnl(last_request); |
c492db37 JB |
194 | } |
195 | ||
e38f8a7a | 196 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
197 | static LIST_HEAD(reg_requests_list); |
198 | static spinlock_t reg_requests_lock; | |
199 | ||
e38f8a7a LR |
200 | /* Used to queue up beacon hints for review */ |
201 | static LIST_HEAD(reg_pending_beacons); | |
202 | static spinlock_t reg_pending_beacons_lock; | |
203 | ||
204 | /* Used to keep track of processed beacon hints */ | |
205 | static LIST_HEAD(reg_beacon_list); | |
206 | ||
207 | struct reg_beacon { | |
208 | struct list_head list; | |
209 | struct ieee80211_channel chan; | |
210 | }; | |
211 | ||
ad932f04 AN |
212 | static void reg_check_chans_work(struct work_struct *work); |
213 | static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work); | |
214 | ||
f333a7a2 LR |
215 | static void reg_todo(struct work_struct *work); |
216 | static DECLARE_WORK(reg_work, reg_todo); | |
217 | ||
734366de JB |
218 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
219 | static const struct ieee80211_regdomain world_regdom = { | |
28981e5e | 220 | .n_reg_rules = 8, |
734366de JB |
221 | .alpha2 = "00", |
222 | .reg_rules = { | |
68798a62 LR |
223 | /* IEEE 802.11b/g, channels 1..11 */ |
224 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
43c771a1 | 225 | /* IEEE 802.11b/g, channels 12..13. */ |
c3826807 JB |
226 | REG_RULE(2467-10, 2472+10, 20, 6, 20, |
227 | NL80211_RRF_NO_IR | NL80211_RRF_AUTO_BW), | |
611b6a82 LR |
228 | /* IEEE 802.11 channel 14 - Only JP enables |
229 | * this and for 802.11b only */ | |
230 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
8fe02e16 | 231 | NL80211_RRF_NO_IR | |
611b6a82 LR |
232 | NL80211_RRF_NO_OFDM), |
233 | /* IEEE 802.11a, channel 36..48 */ | |
c3826807 JB |
234 | REG_RULE(5180-10, 5240+10, 80, 6, 20, |
235 | NL80211_RRF_NO_IR | | |
236 | NL80211_RRF_AUTO_BW), | |
3fc71f77 | 237 | |
131a19bc | 238 | /* IEEE 802.11a, channel 52..64 - DFS required */ |
c3826807 | 239 | REG_RULE(5260-10, 5320+10, 80, 6, 20, |
8fe02e16 | 240 | NL80211_RRF_NO_IR | |
c3826807 | 241 | NL80211_RRF_AUTO_BW | |
131a19bc JB |
242 | NL80211_RRF_DFS), |
243 | ||
244 | /* IEEE 802.11a, channel 100..144 - DFS required */ | |
245 | REG_RULE(5500-10, 5720+10, 160, 6, 20, | |
8fe02e16 | 246 | NL80211_RRF_NO_IR | |
131a19bc | 247 | NL80211_RRF_DFS), |
3fc71f77 LR |
248 | |
249 | /* IEEE 802.11a, channel 149..165 */ | |
8ab9d85c | 250 | REG_RULE(5745-10, 5825+10, 80, 6, 20, |
8fe02e16 | 251 | NL80211_RRF_NO_IR), |
90cdc6df | 252 | |
8047d261 | 253 | /* IEEE 802.11ad (60GHz), channels 1..3 */ |
90cdc6df | 254 | REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), |
734366de JB |
255 | } |
256 | }; | |
257 | ||
38fd2143 | 258 | /* protected by RTNL */ |
a3d2eaf0 JB |
259 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
260 | &world_regdom; | |
734366de | 261 | |
6ee7d330 | 262 | static char *ieee80211_regdom = "00"; |
09d989d1 | 263 | static char user_alpha2[2]; |
6ee7d330 | 264 | |
734366de JB |
265 | module_param(ieee80211_regdom, charp, 0444); |
266 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
267 | ||
c888393b | 268 | static void reg_free_request(struct regulatory_request *request) |
5ad6ef5e | 269 | { |
d34265a3 JB |
270 | if (request == &core_request_world) |
271 | return; | |
272 | ||
c888393b AN |
273 | if (request != get_last_request()) |
274 | kfree(request); | |
275 | } | |
276 | ||
277 | static void reg_free_last_request(void) | |
278 | { | |
279 | struct regulatory_request *lr = get_last_request(); | |
280 | ||
5ad6ef5e LR |
281 | if (lr != &core_request_world && lr) |
282 | kfree_rcu(lr, rcu_head); | |
283 | } | |
284 | ||
05f1a3ea LR |
285 | static void reg_update_last_request(struct regulatory_request *request) |
286 | { | |
255e25b0 LR |
287 | struct regulatory_request *lr; |
288 | ||
289 | lr = get_last_request(); | |
290 | if (lr == request) | |
291 | return; | |
292 | ||
c888393b | 293 | reg_free_last_request(); |
05f1a3ea LR |
294 | rcu_assign_pointer(last_request, request); |
295 | } | |
296 | ||
379b82f4 JB |
297 | static void reset_regdomains(bool full_reset, |
298 | const struct ieee80211_regdomain *new_regdom) | |
734366de | 299 | { |
458f4f9e JB |
300 | const struct ieee80211_regdomain *r; |
301 | ||
38fd2143 | 302 | ASSERT_RTNL(); |
e8da2bb4 | 303 | |
458f4f9e JB |
304 | r = get_cfg80211_regdom(); |
305 | ||
942b25cf | 306 | /* avoid freeing static information or freeing something twice */ |
458f4f9e JB |
307 | if (r == cfg80211_world_regdom) |
308 | r = NULL; | |
942b25cf JB |
309 | if (cfg80211_world_regdom == &world_regdom) |
310 | cfg80211_world_regdom = NULL; | |
458f4f9e JB |
311 | if (r == &world_regdom) |
312 | r = NULL; | |
942b25cf | 313 | |
458f4f9e JB |
314 | rcu_free_regdom(r); |
315 | rcu_free_regdom(cfg80211_world_regdom); | |
734366de | 316 | |
a3d2eaf0 | 317 | cfg80211_world_regdom = &world_regdom; |
458f4f9e | 318 | rcu_assign_pointer(cfg80211_regdomain, new_regdom); |
a042994d LR |
319 | |
320 | if (!full_reset) | |
321 | return; | |
322 | ||
05f1a3ea | 323 | reg_update_last_request(&core_request_world); |
734366de JB |
324 | } |
325 | ||
fb1fc7ad LR |
326 | /* |
327 | * Dynamic world regulatory domain requested by the wireless | |
328 | * core upon initialization | |
329 | */ | |
a3d2eaf0 | 330 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 331 | { |
c492db37 | 332 | struct regulatory_request *lr; |
734366de | 333 | |
c492db37 JB |
334 | lr = get_last_request(); |
335 | ||
336 | WARN_ON(!lr); | |
734366de | 337 | |
379b82f4 | 338 | reset_regdomains(false, rd); |
734366de JB |
339 | |
340 | cfg80211_world_regdom = rd; | |
734366de | 341 | } |
734366de | 342 | |
a3d2eaf0 | 343 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
344 | { |
345 | if (!alpha2) | |
346 | return false; | |
1a919318 | 347 | return alpha2[0] == '0' && alpha2[1] == '0'; |
b2e1b302 | 348 | } |
8318d78a | 349 | |
a3d2eaf0 | 350 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
351 | { |
352 | if (!alpha2) | |
353 | return false; | |
1a919318 | 354 | return alpha2[0] && alpha2[1]; |
b2e1b302 | 355 | } |
8318d78a | 356 | |
a3d2eaf0 | 357 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
358 | { |
359 | if (!alpha2) | |
360 | return false; | |
fb1fc7ad LR |
361 | /* |
362 | * Special case where regulatory domain was built by driver | |
363 | * but a specific alpha2 cannot be determined | |
364 | */ | |
1a919318 | 365 | return alpha2[0] == '9' && alpha2[1] == '9'; |
b2e1b302 | 366 | } |
8318d78a | 367 | |
3f2355cb LR |
368 | static bool is_intersected_alpha2(const char *alpha2) |
369 | { | |
370 | if (!alpha2) | |
371 | return false; | |
fb1fc7ad LR |
372 | /* |
373 | * Special case where regulatory domain is the | |
3f2355cb | 374 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
375 | * structures |
376 | */ | |
1a919318 | 377 | return alpha2[0] == '9' && alpha2[1] == '8'; |
3f2355cb LR |
378 | } |
379 | ||
a3d2eaf0 | 380 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
381 | { |
382 | if (!alpha2) | |
383 | return false; | |
1a919318 | 384 | return isalpha(alpha2[0]) && isalpha(alpha2[1]); |
b2e1b302 | 385 | } |
8318d78a | 386 | |
a3d2eaf0 | 387 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
388 | { |
389 | if (!alpha2_x || !alpha2_y) | |
390 | return false; | |
1a919318 | 391 | return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; |
b2e1b302 LR |
392 | } |
393 | ||
69b1572b | 394 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 395 | { |
458f4f9e | 396 | const struct ieee80211_regdomain *r = get_cfg80211_regdom(); |
761cf7ec | 397 | |
458f4f9e | 398 | if (!r) |
b2e1b302 | 399 | return true; |
458f4f9e | 400 | return !alpha2_equal(r->alpha2, alpha2); |
b2e1b302 LR |
401 | } |
402 | ||
09d989d1 LR |
403 | /* |
404 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
405 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
406 | * has ever been issued. | |
407 | */ | |
408 | static bool is_user_regdom_saved(void) | |
409 | { | |
410 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
411 | return false; | |
412 | ||
413 | /* This would indicate a mistake on the design */ | |
1a919318 | 414 | if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), |
09d989d1 | 415 | "Unexpected user alpha2: %c%c\n", |
1a919318 | 416 | user_alpha2[0], user_alpha2[1])) |
09d989d1 LR |
417 | return false; |
418 | ||
419 | return true; | |
420 | } | |
421 | ||
e9763c3c JB |
422 | static const struct ieee80211_regdomain * |
423 | reg_copy_regd(const struct ieee80211_regdomain *src_regd) | |
3b377ea9 JL |
424 | { |
425 | struct ieee80211_regdomain *regd; | |
e9763c3c | 426 | int size_of_regd; |
3b377ea9 JL |
427 | unsigned int i; |
428 | ||
82f20856 JB |
429 | size_of_regd = |
430 | sizeof(struct ieee80211_regdomain) + | |
431 | src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); | |
3b377ea9 JL |
432 | |
433 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
434 | if (!regd) | |
e9763c3c | 435 | return ERR_PTR(-ENOMEM); |
3b377ea9 JL |
436 | |
437 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
438 | ||
439 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
440 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
e9763c3c | 441 | sizeof(struct ieee80211_reg_rule)); |
3b377ea9 | 442 | |
e9763c3c | 443 | return regd; |
3b377ea9 JL |
444 | } |
445 | ||
c7d319e5 | 446 | struct reg_regdb_apply_request { |
3b377ea9 | 447 | struct list_head list; |
c7d319e5 | 448 | const struct ieee80211_regdomain *regdom; |
3b377ea9 JL |
449 | }; |
450 | ||
c7d319e5 JB |
451 | static LIST_HEAD(reg_regdb_apply_list); |
452 | static DEFINE_MUTEX(reg_regdb_apply_mutex); | |
3b377ea9 | 453 | |
c7d319e5 | 454 | static void reg_regdb_apply(struct work_struct *work) |
3b377ea9 | 455 | { |
c7d319e5 | 456 | struct reg_regdb_apply_request *request; |
a85d0d7f | 457 | |
5fe231e8 | 458 | rtnl_lock(); |
3b377ea9 | 459 | |
c7d319e5 JB |
460 | mutex_lock(®_regdb_apply_mutex); |
461 | while (!list_empty(®_regdb_apply_list)) { | |
462 | request = list_first_entry(®_regdb_apply_list, | |
463 | struct reg_regdb_apply_request, | |
3b377ea9 JL |
464 | list); |
465 | list_del(&request->list); | |
466 | ||
c7d319e5 | 467 | set_regdom(request->regdom, REGD_SOURCE_INTERNAL_DB); |
3b377ea9 JL |
468 | kfree(request); |
469 | } | |
c7d319e5 | 470 | mutex_unlock(®_regdb_apply_mutex); |
a85d0d7f | 471 | |
5fe231e8 | 472 | rtnl_unlock(); |
3b377ea9 JL |
473 | } |
474 | ||
c7d319e5 | 475 | static DECLARE_WORK(reg_regdb_work, reg_regdb_apply); |
3b377ea9 | 476 | |
007f6c5e | 477 | static int reg_schedule_apply(const struct ieee80211_regdomain *regdom) |
3b377ea9 | 478 | { |
c7d319e5 | 479 | struct reg_regdb_apply_request *request; |
3b377ea9 | 480 | |
c7d319e5 | 481 | request = kzalloc(sizeof(struct reg_regdb_apply_request), GFP_KERNEL); |
007f6c5e JB |
482 | if (!request) { |
483 | kfree(regdom); | |
c7d319e5 JB |
484 | return -ENOMEM; |
485 | } | |
3b377ea9 | 486 | |
007f6c5e JB |
487 | request->regdom = regdom; |
488 | ||
c7d319e5 JB |
489 | mutex_lock(®_regdb_apply_mutex); |
490 | list_add_tail(&request->list, ®_regdb_apply_list); | |
491 | mutex_unlock(®_regdb_apply_mutex); | |
3b377ea9 JL |
492 | |
493 | schedule_work(®_regdb_work); | |
c7d319e5 | 494 | return 0; |
3b377ea9 | 495 | } |
80007efe | 496 | |
b6863036 JB |
497 | #ifdef CONFIG_CFG80211_CRDA_SUPPORT |
498 | /* Max number of consecutive attempts to communicate with CRDA */ | |
499 | #define REG_MAX_CRDA_TIMEOUTS 10 | |
500 | ||
501 | static u32 reg_crda_timeouts; | |
502 | ||
503 | static void crda_timeout_work(struct work_struct *work); | |
504 | static DECLARE_DELAYED_WORK(crda_timeout, crda_timeout_work); | |
505 | ||
506 | static void crda_timeout_work(struct work_struct *work) | |
507 | { | |
c799ba6e | 508 | pr_debug("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); |
b6863036 JB |
509 | rtnl_lock(); |
510 | reg_crda_timeouts++; | |
511 | restore_regulatory_settings(true); | |
512 | rtnl_unlock(); | |
513 | } | |
514 | ||
515 | static void cancel_crda_timeout(void) | |
516 | { | |
517 | cancel_delayed_work(&crda_timeout); | |
518 | } | |
519 | ||
520 | static void cancel_crda_timeout_sync(void) | |
521 | { | |
522 | cancel_delayed_work_sync(&crda_timeout); | |
523 | } | |
524 | ||
525 | static void reset_crda_timeouts(void) | |
526 | { | |
527 | reg_crda_timeouts = 0; | |
528 | } | |
529 | ||
fb1fc7ad LR |
530 | /* |
531 | * This lets us keep regulatory code which is updated on a regulatory | |
1226d258 | 532 | * basis in userspace. |
fb1fc7ad | 533 | */ |
b2e1b302 LR |
534 | static int call_crda(const char *alpha2) |
535 | { | |
1226d258 JB |
536 | char country[12]; |
537 | char *env[] = { country, NULL }; | |
c7d319e5 | 538 | int ret; |
1226d258 JB |
539 | |
540 | snprintf(country, sizeof(country), "COUNTRY=%c%c", | |
541 | alpha2[0], alpha2[1]); | |
542 | ||
c37722bd | 543 | if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) { |
042ab5fc | 544 | pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n"); |
c37722bd I |
545 | return -EINVAL; |
546 | } | |
547 | ||
b2e1b302 | 548 | if (!is_world_regdom((char *) alpha2)) |
042ab5fc | 549 | pr_debug("Calling CRDA for country: %c%c\n", |
c799ba6e | 550 | alpha2[0], alpha2[1]); |
b2e1b302 | 551 | else |
042ab5fc | 552 | pr_debug("Calling CRDA to update world regulatory domain\n"); |
b2e1b302 | 553 | |
c7d319e5 JB |
554 | ret = kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env); |
555 | if (ret) | |
556 | return ret; | |
557 | ||
558 | queue_delayed_work(system_power_efficient_wq, | |
b6863036 | 559 | &crda_timeout, msecs_to_jiffies(3142)); |
c7d319e5 | 560 | return 0; |
b2e1b302 | 561 | } |
b6863036 JB |
562 | #else |
563 | static inline void cancel_crda_timeout(void) {} | |
564 | static inline void cancel_crda_timeout_sync(void) {} | |
565 | static inline void reset_crda_timeouts(void) {} | |
566 | static inline int call_crda(const char *alpha2) | |
567 | { | |
568 | return -ENODATA; | |
569 | } | |
570 | #endif /* CONFIG_CFG80211_CRDA_SUPPORT */ | |
b2e1b302 | 571 | |
007f6c5e JB |
572 | /* code to directly load a firmware database through request_firmware */ |
573 | static const struct fwdb_header *regdb; | |
574 | ||
575 | struct fwdb_country { | |
576 | u8 alpha2[2]; | |
577 | __be16 coll_ptr; | |
578 | /* this struct cannot be extended */ | |
579 | } __packed __aligned(4); | |
580 | ||
581 | struct fwdb_collection { | |
582 | u8 len; | |
583 | u8 n_rules; | |
584 | u8 dfs_region; | |
585 | /* no optional data yet */ | |
586 | /* aligned to 2, then followed by __be16 array of rule pointers */ | |
587 | } __packed __aligned(4); | |
588 | ||
589 | enum fwdb_flags { | |
590 | FWDB_FLAG_NO_OFDM = BIT(0), | |
591 | FWDB_FLAG_NO_OUTDOOR = BIT(1), | |
592 | FWDB_FLAG_DFS = BIT(2), | |
593 | FWDB_FLAG_NO_IR = BIT(3), | |
594 | FWDB_FLAG_AUTO_BW = BIT(4), | |
595 | }; | |
596 | ||
597 | struct fwdb_rule { | |
598 | u8 len; | |
599 | u8 flags; | |
600 | __be16 max_eirp; | |
601 | __be32 start, end, max_bw; | |
602 | /* start of optional data */ | |
603 | __be16 cac_timeout; | |
604 | } __packed __aligned(4); | |
605 | ||
606 | #define FWDB_MAGIC 0x52474442 | |
607 | #define FWDB_VERSION 20 | |
608 | ||
609 | struct fwdb_header { | |
610 | __be32 magic; | |
611 | __be32 version; | |
612 | struct fwdb_country country[]; | |
613 | } __packed __aligned(4); | |
614 | ||
615 | static bool valid_rule(const u8 *data, unsigned int size, u16 rule_ptr) | |
616 | { | |
617 | struct fwdb_rule *rule = (void *)(data + (rule_ptr << 2)); | |
618 | ||
619 | if ((u8 *)rule + sizeof(rule->len) > data + size) | |
620 | return false; | |
621 | ||
622 | /* mandatory fields */ | |
623 | if (rule->len < offsetofend(struct fwdb_rule, max_bw)) | |
624 | return false; | |
625 | ||
626 | return true; | |
627 | } | |
628 | ||
629 | static bool valid_country(const u8 *data, unsigned int size, | |
630 | const struct fwdb_country *country) | |
631 | { | |
632 | unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2; | |
633 | struct fwdb_collection *coll = (void *)(data + ptr); | |
634 | __be16 *rules_ptr; | |
635 | unsigned int i; | |
636 | ||
637 | /* make sure we can read len/n_rules */ | |
638 | if ((u8 *)coll + offsetofend(typeof(*coll), n_rules) > data + size) | |
639 | return false; | |
640 | ||
641 | /* make sure base struct and all rules fit */ | |
642 | if ((u8 *)coll + ALIGN(coll->len, 2) + | |
643 | (coll->n_rules * 2) > data + size) | |
644 | return false; | |
645 | ||
646 | /* mandatory fields must exist */ | |
647 | if (coll->len < offsetofend(struct fwdb_collection, dfs_region)) | |
648 | return false; | |
649 | ||
650 | rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2)); | |
651 | ||
652 | for (i = 0; i < coll->n_rules; i++) { | |
653 | u16 rule_ptr = be16_to_cpu(rules_ptr[i]); | |
654 | ||
655 | if (!valid_rule(data, size, rule_ptr)) | |
656 | return false; | |
657 | } | |
658 | ||
659 | return true; | |
660 | } | |
661 | ||
662 | static bool valid_regdb(const u8 *data, unsigned int size) | |
663 | { | |
664 | const struct fwdb_header *hdr = (void *)data; | |
665 | const struct fwdb_country *country; | |
666 | ||
667 | if (size < sizeof(*hdr)) | |
668 | return false; | |
669 | ||
670 | if (hdr->magic != cpu_to_be32(FWDB_MAGIC)) | |
671 | return false; | |
672 | ||
673 | if (hdr->version != cpu_to_be32(FWDB_VERSION)) | |
674 | return false; | |
675 | ||
676 | country = &hdr->country[0]; | |
677 | while ((u8 *)(country + 1) <= data + size) { | |
678 | if (!country->coll_ptr) | |
679 | break; | |
680 | if (!valid_country(data, size, country)) | |
681 | return false; | |
682 | country++; | |
683 | } | |
684 | ||
685 | return true; | |
686 | } | |
687 | ||
688 | static int regdb_query_country(const struct fwdb_header *db, | |
689 | const struct fwdb_country *country) | |
690 | { | |
691 | unsigned int ptr = be16_to_cpu(country->coll_ptr) << 2; | |
692 | struct fwdb_collection *coll = (void *)((u8 *)db + ptr); | |
693 | struct ieee80211_regdomain *regdom; | |
694 | unsigned int size_of_regd; | |
695 | unsigned int i; | |
696 | ||
697 | size_of_regd = | |
698 | sizeof(struct ieee80211_regdomain) + | |
699 | coll->n_rules * sizeof(struct ieee80211_reg_rule); | |
700 | ||
701 | regdom = kzalloc(size_of_regd, GFP_KERNEL); | |
702 | if (!regdom) | |
703 | return -ENOMEM; | |
704 | ||
705 | regdom->n_reg_rules = coll->n_rules; | |
706 | regdom->alpha2[0] = country->alpha2[0]; | |
707 | regdom->alpha2[1] = country->alpha2[1]; | |
708 | regdom->dfs_region = coll->dfs_region; | |
709 | ||
710 | for (i = 0; i < regdom->n_reg_rules; i++) { | |
711 | __be16 *rules_ptr = (void *)((u8 *)coll + ALIGN(coll->len, 2)); | |
712 | unsigned int rule_ptr = be16_to_cpu(rules_ptr[i]) << 2; | |
713 | struct fwdb_rule *rule = (void *)((u8 *)db + rule_ptr); | |
714 | struct ieee80211_reg_rule *rrule = ®dom->reg_rules[i]; | |
715 | ||
716 | rrule->freq_range.start_freq_khz = be32_to_cpu(rule->start); | |
717 | rrule->freq_range.end_freq_khz = be32_to_cpu(rule->end); | |
718 | rrule->freq_range.max_bandwidth_khz = be32_to_cpu(rule->max_bw); | |
719 | ||
720 | rrule->power_rule.max_antenna_gain = 0; | |
721 | rrule->power_rule.max_eirp = be16_to_cpu(rule->max_eirp); | |
722 | ||
723 | rrule->flags = 0; | |
724 | if (rule->flags & FWDB_FLAG_NO_OFDM) | |
725 | rrule->flags |= NL80211_RRF_NO_OFDM; | |
726 | if (rule->flags & FWDB_FLAG_NO_OUTDOOR) | |
727 | rrule->flags |= NL80211_RRF_NO_OUTDOOR; | |
728 | if (rule->flags & FWDB_FLAG_DFS) | |
729 | rrule->flags |= NL80211_RRF_DFS; | |
730 | if (rule->flags & FWDB_FLAG_NO_IR) | |
731 | rrule->flags |= NL80211_RRF_NO_IR; | |
732 | if (rule->flags & FWDB_FLAG_AUTO_BW) | |
733 | rrule->flags |= NL80211_RRF_AUTO_BW; | |
734 | ||
735 | rrule->dfs_cac_ms = 0; | |
736 | ||
737 | /* handle optional data */ | |
738 | if (rule->len >= offsetofend(struct fwdb_rule, cac_timeout)) | |
739 | rrule->dfs_cac_ms = | |
740 | 1000 * be16_to_cpu(rule->cac_timeout); | |
741 | } | |
742 | ||
743 | return reg_schedule_apply(regdom); | |
744 | } | |
745 | ||
746 | static int query_regdb(const char *alpha2) | |
747 | { | |
748 | const struct fwdb_header *hdr = regdb; | |
749 | const struct fwdb_country *country; | |
750 | ||
1ea4ff3e JB |
751 | ASSERT_RTNL(); |
752 | ||
007f6c5e JB |
753 | if (IS_ERR(regdb)) |
754 | return PTR_ERR(regdb); | |
755 | ||
756 | country = &hdr->country[0]; | |
757 | while (country->coll_ptr) { | |
758 | if (alpha2_equal(alpha2, country->alpha2)) | |
759 | return regdb_query_country(regdb, country); | |
760 | country++; | |
761 | } | |
762 | ||
763 | return -ENODATA; | |
764 | } | |
765 | ||
766 | static void regdb_fw_cb(const struct firmware *fw, void *context) | |
767 | { | |
1ea4ff3e JB |
768 | int set_error = 0; |
769 | bool restore = true; | |
007f6c5e JB |
770 | void *db; |
771 | ||
772 | if (!fw) { | |
773 | pr_info("failed to load regulatory.db\n"); | |
1ea4ff3e JB |
774 | set_error = -ENODATA; |
775 | } else if (!valid_regdb(fw->data, fw->size)) { | |
776 | pr_info("loaded regulatory.db is malformed\n"); | |
777 | set_error = -EINVAL; | |
007f6c5e JB |
778 | } |
779 | ||
1ea4ff3e JB |
780 | rtnl_lock(); |
781 | if (WARN_ON(regdb && !IS_ERR(regdb))) { | |
782 | /* just restore and free new db */ | |
783 | } else if (set_error) { | |
784 | regdb = ERR_PTR(set_error); | |
785 | } else if (fw) { | |
786 | db = kmemdup(fw->data, fw->size, GFP_KERNEL); | |
787 | if (db) { | |
788 | regdb = db; | |
789 | restore = context && query_regdb(context); | |
790 | } else { | |
791 | restore = true; | |
792 | } | |
007f6c5e JB |
793 | } |
794 | ||
1ea4ff3e JB |
795 | if (restore) |
796 | restore_regulatory_settings(true); | |
007f6c5e | 797 | |
007f6c5e | 798 | rtnl_unlock(); |
1ea4ff3e | 799 | |
007f6c5e | 800 | kfree(context); |
1ea4ff3e JB |
801 | |
802 | release_firmware(fw); | |
007f6c5e JB |
803 | } |
804 | ||
805 | static int query_regdb_file(const char *alpha2) | |
806 | { | |
1ea4ff3e JB |
807 | ASSERT_RTNL(); |
808 | ||
007f6c5e JB |
809 | if (regdb) |
810 | return query_regdb(alpha2); | |
811 | ||
812 | alpha2 = kmemdup(alpha2, 2, GFP_KERNEL); | |
813 | if (!alpha2) | |
814 | return -ENOMEM; | |
815 | ||
816 | return request_firmware_nowait(THIS_MODULE, true, "regulatory.db", | |
817 | ®_pdev->dev, GFP_KERNEL, | |
818 | (void *)alpha2, regdb_fw_cb); | |
819 | } | |
820 | ||
1ea4ff3e JB |
821 | int reg_reload_regdb(void) |
822 | { | |
823 | const struct firmware *fw; | |
824 | void *db; | |
825 | int err; | |
826 | ||
827 | err = request_firmware(&fw, "regulatory.db", ®_pdev->dev); | |
828 | if (err) | |
829 | return err; | |
830 | ||
831 | if (!valid_regdb(fw->data, fw->size)) { | |
832 | err = -ENODATA; | |
833 | goto out; | |
834 | } | |
835 | ||
836 | db = kmemdup(fw->data, fw->size, GFP_KERNEL); | |
837 | if (!db) { | |
838 | err = -ENOMEM; | |
839 | goto out; | |
840 | } | |
841 | ||
842 | rtnl_lock(); | |
843 | if (!IS_ERR_OR_NULL(regdb)) | |
844 | kfree(regdb); | |
845 | regdb = db; | |
846 | rtnl_unlock(); | |
847 | ||
848 | out: | |
849 | release_firmware(fw); | |
850 | return err; | |
851 | } | |
852 | ||
cecbb069 | 853 | static bool reg_query_database(struct regulatory_request *request) |
fe6631ff | 854 | { |
007f6c5e JB |
855 | if (query_regdb_file(request->alpha2) == 0) |
856 | return true; | |
857 | ||
c7d319e5 JB |
858 | if (call_crda(request->alpha2) == 0) |
859 | return true; | |
860 | ||
861 | return false; | |
fe6631ff LR |
862 | } |
863 | ||
e438768f | 864 | bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 865 | { |
c492db37 | 866 | struct regulatory_request *lr = get_last_request(); |
61405e97 | 867 | |
c492db37 | 868 | if (!lr || lr->processed) |
f6037d09 JB |
869 | return false; |
870 | ||
c492db37 | 871 | return alpha2_equal(lr->alpha2, alpha2); |
b2e1b302 | 872 | } |
8318d78a | 873 | |
e3961af1 JD |
874 | static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy) |
875 | { | |
876 | struct regulatory_request *lr = get_last_request(); | |
877 | ||
878 | /* | |
879 | * Follow the driver's regulatory domain, if present, unless a country | |
880 | * IE has been processed or a user wants to help complaince further | |
881 | */ | |
882 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
883 | lr->initiator != NL80211_REGDOM_SET_BY_USER && | |
884 | wiphy->regd) | |
885 | return get_wiphy_regdom(wiphy); | |
886 | ||
887 | return get_cfg80211_regdom(); | |
888 | } | |
889 | ||
a6d4a534 AN |
890 | static unsigned int |
891 | reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd, | |
892 | const struct ieee80211_reg_rule *rule) | |
97524820 JD |
893 | { |
894 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; | |
895 | const struct ieee80211_freq_range *freq_range_tmp; | |
896 | const struct ieee80211_reg_rule *tmp; | |
897 | u32 start_freq, end_freq, idx, no; | |
898 | ||
899 | for (idx = 0; idx < rd->n_reg_rules; idx++) | |
900 | if (rule == &rd->reg_rules[idx]) | |
901 | break; | |
902 | ||
903 | if (idx == rd->n_reg_rules) | |
904 | return 0; | |
905 | ||
906 | /* get start_freq */ | |
907 | no = idx; | |
908 | ||
909 | while (no) { | |
910 | tmp = &rd->reg_rules[--no]; | |
911 | freq_range_tmp = &tmp->freq_range; | |
912 | ||
913 | if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz) | |
914 | break; | |
915 | ||
97524820 JD |
916 | freq_range = freq_range_tmp; |
917 | } | |
918 | ||
919 | start_freq = freq_range->start_freq_khz; | |
920 | ||
921 | /* get end_freq */ | |
922 | freq_range = &rule->freq_range; | |
923 | no = idx; | |
924 | ||
925 | while (no < rd->n_reg_rules - 1) { | |
926 | tmp = &rd->reg_rules[++no]; | |
927 | freq_range_tmp = &tmp->freq_range; | |
928 | ||
929 | if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz) | |
930 | break; | |
931 | ||
97524820 JD |
932 | freq_range = freq_range_tmp; |
933 | } | |
934 | ||
935 | end_freq = freq_range->end_freq_khz; | |
936 | ||
937 | return end_freq - start_freq; | |
938 | } | |
939 | ||
a6d4a534 AN |
940 | unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd, |
941 | const struct ieee80211_reg_rule *rule) | |
942 | { | |
943 | unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule); | |
944 | ||
945 | if (rule->flags & NL80211_RRF_NO_160MHZ) | |
946 | bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80)); | |
947 | if (rule->flags & NL80211_RRF_NO_80MHZ) | |
948 | bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40)); | |
949 | ||
950 | /* | |
951 | * HT40+/HT40- limits are handled per-channel. Only limit BW if both | |
952 | * are not allowed. | |
953 | */ | |
954 | if (rule->flags & NL80211_RRF_NO_HT40MINUS && | |
955 | rule->flags & NL80211_RRF_NO_HT40PLUS) | |
956 | bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20)); | |
957 | ||
958 | return bw; | |
959 | } | |
960 | ||
b2e1b302 | 961 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 962 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 963 | { |
a3d2eaf0 | 964 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
965 | u32 freq_diff; |
966 | ||
91e99004 | 967 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
968 | return false; |
969 | ||
970 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
971 | return false; | |
972 | ||
973 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
974 | ||
bd05f28e | 975 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
1a919318 | 976 | freq_range->max_bandwidth_khz > freq_diff) |
b2e1b302 LR |
977 | return false; |
978 | ||
979 | return true; | |
980 | } | |
981 | ||
a3d2eaf0 | 982 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 983 | { |
a3d2eaf0 | 984 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 985 | unsigned int i; |
8318d78a | 986 | |
b2e1b302 LR |
987 | if (!rd->n_reg_rules) |
988 | return false; | |
8318d78a | 989 | |
88dc1c3f LR |
990 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
991 | return false; | |
992 | ||
b2e1b302 LR |
993 | for (i = 0; i < rd->n_reg_rules; i++) { |
994 | reg_rule = &rd->reg_rules[i]; | |
995 | if (!is_valid_reg_rule(reg_rule)) | |
996 | return false; | |
997 | } | |
998 | ||
999 | return true; | |
8318d78a JB |
1000 | } |
1001 | ||
0c7dc45d LR |
1002 | /** |
1003 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
1004 | * @freq_range: frequency rule we want to query | |
1005 | * @freq_khz: frequency we are inquiring about | |
1006 | * | |
1007 | * This lets us know if a specific frequency rule is or is not relevant to | |
1008 | * a specific frequency's band. Bands are device specific and artificial | |
64629b9d VK |
1009 | * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), |
1010 | * however it is safe for now to assume that a frequency rule should not be | |
1011 | * part of a frequency's band if the start freq or end freq are off by more | |
1012 | * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the | |
1013 | * 60 GHz band. | |
0c7dc45d LR |
1014 | * This resolution can be lowered and should be considered as we add |
1015 | * regulatory rule support for other "bands". | |
1016 | **/ | |
1017 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
1a919318 | 1018 | u32 freq_khz) |
0c7dc45d LR |
1019 | { |
1020 | #define ONE_GHZ_IN_KHZ 1000000 | |
64629b9d VK |
1021 | /* |
1022 | * From 802.11ad: directional multi-gigabit (DMG): | |
1023 | * Pertaining to operation in a frequency band containing a channel | |
1024 | * with the Channel starting frequency above 45 GHz. | |
1025 | */ | |
1026 | u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? | |
1027 | 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; | |
1028 | if (abs(freq_khz - freq_range->start_freq_khz) <= limit) | |
0c7dc45d | 1029 | return true; |
64629b9d | 1030 | if (abs(freq_khz - freq_range->end_freq_khz) <= limit) |
0c7dc45d LR |
1031 | return true; |
1032 | return false; | |
1033 | #undef ONE_GHZ_IN_KHZ | |
1034 | } | |
1035 | ||
adbfb058 LR |
1036 | /* |
1037 | * Later on we can perhaps use the more restrictive DFS | |
1038 | * region but we don't have information for that yet so | |
1039 | * for now simply disallow conflicts. | |
1040 | */ | |
1041 | static enum nl80211_dfs_regions | |
1042 | reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1, | |
1043 | const enum nl80211_dfs_regions dfs_region2) | |
1044 | { | |
1045 | if (dfs_region1 != dfs_region2) | |
1046 | return NL80211_DFS_UNSET; | |
1047 | return dfs_region1; | |
1048 | } | |
1049 | ||
fb1fc7ad LR |
1050 | /* |
1051 | * Helper for regdom_intersect(), this does the real | |
1052 | * mathematical intersection fun | |
1053 | */ | |
97524820 JD |
1054 | static int reg_rules_intersect(const struct ieee80211_regdomain *rd1, |
1055 | const struct ieee80211_regdomain *rd2, | |
1056 | const struct ieee80211_reg_rule *rule1, | |
1a919318 JB |
1057 | const struct ieee80211_reg_rule *rule2, |
1058 | struct ieee80211_reg_rule *intersected_rule) | |
9c96477d LR |
1059 | { |
1060 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
1061 | struct ieee80211_freq_range *freq_range; | |
1062 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
1063 | struct ieee80211_power_rule *power_rule; | |
97524820 | 1064 | u32 freq_diff, max_bandwidth1, max_bandwidth2; |
9c96477d LR |
1065 | |
1066 | freq_range1 = &rule1->freq_range; | |
1067 | freq_range2 = &rule2->freq_range; | |
1068 | freq_range = &intersected_rule->freq_range; | |
1069 | ||
1070 | power_rule1 = &rule1->power_rule; | |
1071 | power_rule2 = &rule2->power_rule; | |
1072 | power_rule = &intersected_rule->power_rule; | |
1073 | ||
1074 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
1a919318 | 1075 | freq_range2->start_freq_khz); |
9c96477d | 1076 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
1a919318 | 1077 | freq_range2->end_freq_khz); |
97524820 JD |
1078 | |
1079 | max_bandwidth1 = freq_range1->max_bandwidth_khz; | |
1080 | max_bandwidth2 = freq_range2->max_bandwidth_khz; | |
1081 | ||
b0dfd2ea JD |
1082 | if (rule1->flags & NL80211_RRF_AUTO_BW) |
1083 | max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1); | |
1084 | if (rule2->flags & NL80211_RRF_AUTO_BW) | |
1085 | max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2); | |
97524820 JD |
1086 | |
1087 | freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2); | |
9c96477d | 1088 | |
b0dfd2ea JD |
1089 | intersected_rule->flags = rule1->flags | rule2->flags; |
1090 | ||
1091 | /* | |
1092 | * In case NL80211_RRF_AUTO_BW requested for both rules | |
1093 | * set AUTO_BW in intersected rule also. Next we will | |
1094 | * calculate BW correctly in handle_channel function. | |
1095 | * In other case remove AUTO_BW flag while we calculate | |
1096 | * maximum bandwidth correctly and auto calculation is | |
1097 | * not required. | |
1098 | */ | |
1099 | if ((rule1->flags & NL80211_RRF_AUTO_BW) && | |
1100 | (rule2->flags & NL80211_RRF_AUTO_BW)) | |
1101 | intersected_rule->flags |= NL80211_RRF_AUTO_BW; | |
1102 | else | |
1103 | intersected_rule->flags &= ~NL80211_RRF_AUTO_BW; | |
1104 | ||
9c96477d LR |
1105 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; |
1106 | if (freq_range->max_bandwidth_khz > freq_diff) | |
1107 | freq_range->max_bandwidth_khz = freq_diff; | |
1108 | ||
1109 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
1110 | power_rule2->max_eirp); | |
1111 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
1112 | power_rule2->max_antenna_gain); | |
1113 | ||
089027e5 JD |
1114 | intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms, |
1115 | rule2->dfs_cac_ms); | |
1116 | ||
9c96477d LR |
1117 | if (!is_valid_reg_rule(intersected_rule)) |
1118 | return -EINVAL; | |
1119 | ||
1120 | return 0; | |
1121 | } | |
1122 | ||
a62a1aed EP |
1123 | /* check whether old rule contains new rule */ |
1124 | static bool rule_contains(struct ieee80211_reg_rule *r1, | |
1125 | struct ieee80211_reg_rule *r2) | |
1126 | { | |
1127 | /* for simplicity, currently consider only same flags */ | |
1128 | if (r1->flags != r2->flags) | |
1129 | return false; | |
1130 | ||
1131 | /* verify r1 is more restrictive */ | |
1132 | if ((r1->power_rule.max_antenna_gain > | |
1133 | r2->power_rule.max_antenna_gain) || | |
1134 | r1->power_rule.max_eirp > r2->power_rule.max_eirp) | |
1135 | return false; | |
1136 | ||
1137 | /* make sure r2's range is contained within r1 */ | |
1138 | if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz || | |
1139 | r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz) | |
1140 | return false; | |
1141 | ||
1142 | /* and finally verify that r1.max_bw >= r2.max_bw */ | |
1143 | if (r1->freq_range.max_bandwidth_khz < | |
1144 | r2->freq_range.max_bandwidth_khz) | |
1145 | return false; | |
1146 | ||
1147 | return true; | |
1148 | } | |
1149 | ||
1150 | /* add or extend current rules. do nothing if rule is already contained */ | |
1151 | static void add_rule(struct ieee80211_reg_rule *rule, | |
1152 | struct ieee80211_reg_rule *reg_rules, u32 *n_rules) | |
1153 | { | |
1154 | struct ieee80211_reg_rule *tmp_rule; | |
1155 | int i; | |
1156 | ||
1157 | for (i = 0; i < *n_rules; i++) { | |
1158 | tmp_rule = ®_rules[i]; | |
1159 | /* rule is already contained - do nothing */ | |
1160 | if (rule_contains(tmp_rule, rule)) | |
1161 | return; | |
1162 | ||
1163 | /* extend rule if possible */ | |
1164 | if (rule_contains(rule, tmp_rule)) { | |
1165 | memcpy(tmp_rule, rule, sizeof(*rule)); | |
1166 | return; | |
1167 | } | |
1168 | } | |
1169 | ||
1170 | memcpy(®_rules[*n_rules], rule, sizeof(*rule)); | |
1171 | (*n_rules)++; | |
1172 | } | |
1173 | ||
9c96477d LR |
1174 | /** |
1175 | * regdom_intersect - do the intersection between two regulatory domains | |
1176 | * @rd1: first regulatory domain | |
1177 | * @rd2: second regulatory domain | |
1178 | * | |
1179 | * Use this function to get the intersection between two regulatory domains. | |
1180 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
1181 | * as no one single alpha2 can represent this regulatory domain. | |
1182 | * | |
1183 | * Returns a pointer to the regulatory domain structure which will hold the | |
1184 | * resulting intersection of rules between rd1 and rd2. We will | |
1185 | * kzalloc() this structure for you. | |
1186 | */ | |
1a919318 JB |
1187 | static struct ieee80211_regdomain * |
1188 | regdom_intersect(const struct ieee80211_regdomain *rd1, | |
1189 | const struct ieee80211_regdomain *rd2) | |
9c96477d LR |
1190 | { |
1191 | int r, size_of_regd; | |
1192 | unsigned int x, y; | |
a62a1aed | 1193 | unsigned int num_rules = 0; |
9c96477d | 1194 | const struct ieee80211_reg_rule *rule1, *rule2; |
a62a1aed | 1195 | struct ieee80211_reg_rule intersected_rule; |
9c96477d | 1196 | struct ieee80211_regdomain *rd; |
9c96477d LR |
1197 | |
1198 | if (!rd1 || !rd2) | |
1199 | return NULL; | |
1200 | ||
fb1fc7ad LR |
1201 | /* |
1202 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
1203 | * build them. This is to so we can malloc() and free() a |
1204 | * regdomain once. The reason we use reg_rules_intersect() here | |
1205 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
1206 | * All rules that do check out OK are valid. |
1207 | */ | |
9c96477d LR |
1208 | |
1209 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
1210 | rule1 = &rd1->reg_rules[x]; | |
1211 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
1212 | rule2 = &rd2->reg_rules[y]; | |
97524820 | 1213 | if (!reg_rules_intersect(rd1, rd2, rule1, rule2, |
a62a1aed | 1214 | &intersected_rule)) |
9c96477d | 1215 | num_rules++; |
9c96477d LR |
1216 | } |
1217 | } | |
1218 | ||
1219 | if (!num_rules) | |
1220 | return NULL; | |
1221 | ||
1222 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
82f20856 | 1223 | num_rules * sizeof(struct ieee80211_reg_rule); |
9c96477d LR |
1224 | |
1225 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
1226 | if (!rd) | |
1227 | return NULL; | |
1228 | ||
a62a1aed | 1229 | for (x = 0; x < rd1->n_reg_rules; x++) { |
9c96477d | 1230 | rule1 = &rd1->reg_rules[x]; |
a62a1aed | 1231 | for (y = 0; y < rd2->n_reg_rules; y++) { |
9c96477d | 1232 | rule2 = &rd2->reg_rules[y]; |
97524820 | 1233 | r = reg_rules_intersect(rd1, rd2, rule1, rule2, |
a62a1aed | 1234 | &intersected_rule); |
fb1fc7ad LR |
1235 | /* |
1236 | * No need to memset here the intersected rule here as | |
1237 | * we're not using the stack anymore | |
1238 | */ | |
9c96477d LR |
1239 | if (r) |
1240 | continue; | |
9c96477d | 1241 | |
a62a1aed EP |
1242 | add_rule(&intersected_rule, rd->reg_rules, |
1243 | &rd->n_reg_rules); | |
1244 | } | |
9c96477d LR |
1245 | } |
1246 | ||
9c96477d LR |
1247 | rd->alpha2[0] = '9'; |
1248 | rd->alpha2[1] = '8'; | |
adbfb058 LR |
1249 | rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region, |
1250 | rd2->dfs_region); | |
9c96477d LR |
1251 | |
1252 | return rd; | |
1253 | } | |
1254 | ||
fb1fc7ad LR |
1255 | /* |
1256 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
1257 | * want to just have the channel structure use these | |
1258 | */ | |
b2e1b302 LR |
1259 | static u32 map_regdom_flags(u32 rd_flags) |
1260 | { | |
1261 | u32 channel_flags = 0; | |
8fe02e16 LR |
1262 | if (rd_flags & NL80211_RRF_NO_IR_ALL) |
1263 | channel_flags |= IEEE80211_CHAN_NO_IR; | |
b2e1b302 LR |
1264 | if (rd_flags & NL80211_RRF_DFS) |
1265 | channel_flags |= IEEE80211_CHAN_RADAR; | |
03f6b084 SF |
1266 | if (rd_flags & NL80211_RRF_NO_OFDM) |
1267 | channel_flags |= IEEE80211_CHAN_NO_OFDM; | |
570dbde1 DS |
1268 | if (rd_flags & NL80211_RRF_NO_OUTDOOR) |
1269 | channel_flags |= IEEE80211_CHAN_INDOOR_ONLY; | |
06f207fc AN |
1270 | if (rd_flags & NL80211_RRF_IR_CONCURRENT) |
1271 | channel_flags |= IEEE80211_CHAN_IR_CONCURRENT; | |
a6d4a534 AN |
1272 | if (rd_flags & NL80211_RRF_NO_HT40MINUS) |
1273 | channel_flags |= IEEE80211_CHAN_NO_HT40MINUS; | |
1274 | if (rd_flags & NL80211_RRF_NO_HT40PLUS) | |
1275 | channel_flags |= IEEE80211_CHAN_NO_HT40PLUS; | |
1276 | if (rd_flags & NL80211_RRF_NO_80MHZ) | |
1277 | channel_flags |= IEEE80211_CHAN_NO_80MHZ; | |
1278 | if (rd_flags & NL80211_RRF_NO_160MHZ) | |
1279 | channel_flags |= IEEE80211_CHAN_NO_160MHZ; | |
b2e1b302 LR |
1280 | return channel_flags; |
1281 | } | |
1282 | ||
361c9c8b | 1283 | static const struct ieee80211_reg_rule * |
49172874 | 1284 | freq_reg_info_regd(u32 center_freq, |
4edd5698 | 1285 | const struct ieee80211_regdomain *regd, u32 bw) |
8318d78a JB |
1286 | { |
1287 | int i; | |
0c7dc45d | 1288 | bool band_rule_found = false; |
038659e7 LR |
1289 | bool bw_fits = false; |
1290 | ||
3e0c3ff3 | 1291 | if (!regd) |
361c9c8b | 1292 | return ERR_PTR(-EINVAL); |
b2e1b302 | 1293 | |
3e0c3ff3 | 1294 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
1295 | const struct ieee80211_reg_rule *rr; |
1296 | const struct ieee80211_freq_range *fr = NULL; | |
b2e1b302 | 1297 | |
3e0c3ff3 | 1298 | rr = ®d->reg_rules[i]; |
b2e1b302 | 1299 | fr = &rr->freq_range; |
0c7dc45d | 1300 | |
fb1fc7ad LR |
1301 | /* |
1302 | * We only need to know if one frequency rule was | |
0c7dc45d | 1303 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
1304 | * not overwrite it once found |
1305 | */ | |
0c7dc45d LR |
1306 | if (!band_rule_found) |
1307 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
1308 | ||
4787cfa0 | 1309 | bw_fits = cfg80211_does_bw_fit_range(fr, center_freq, bw); |
0c7dc45d | 1310 | |
361c9c8b JB |
1311 | if (band_rule_found && bw_fits) |
1312 | return rr; | |
8318d78a JB |
1313 | } |
1314 | ||
0c7dc45d | 1315 | if (!band_rule_found) |
361c9c8b | 1316 | return ERR_PTR(-ERANGE); |
0c7dc45d | 1317 | |
361c9c8b | 1318 | return ERR_PTR(-EINVAL); |
b2e1b302 LR |
1319 | } |
1320 | ||
8de1c63b JB |
1321 | static const struct ieee80211_reg_rule * |
1322 | __freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw) | |
1fa25e41 | 1323 | { |
4edd5698 MM |
1324 | const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy); |
1325 | const struct ieee80211_reg_rule *reg_rule = NULL; | |
1326 | u32 bw; | |
1a919318 | 1327 | |
4edd5698 | 1328 | for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) { |
49172874 | 1329 | reg_rule = freq_reg_info_regd(center_freq, regd, bw); |
4edd5698 MM |
1330 | if (!IS_ERR(reg_rule)) |
1331 | return reg_rule; | |
1332 | } | |
5d885b99 | 1333 | |
4edd5698 MM |
1334 | return reg_rule; |
1335 | } | |
1336 | ||
1337 | const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, | |
1338 | u32 center_freq) | |
1339 | { | |
1340 | return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(20)); | |
1fa25e41 | 1341 | } |
4f366c5d | 1342 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 1343 | |
034c6d6e | 1344 | const char *reg_initiator_name(enum nl80211_reg_initiator initiator) |
926a0a09 LR |
1345 | { |
1346 | switch (initiator) { | |
1347 | case NL80211_REGDOM_SET_BY_CORE: | |
034c6d6e | 1348 | return "core"; |
926a0a09 | 1349 | case NL80211_REGDOM_SET_BY_USER: |
034c6d6e | 1350 | return "user"; |
926a0a09 | 1351 | case NL80211_REGDOM_SET_BY_DRIVER: |
034c6d6e | 1352 | return "driver"; |
926a0a09 | 1353 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
034c6d6e | 1354 | return "country IE"; |
926a0a09 LR |
1355 | default: |
1356 | WARN_ON(1); | |
034c6d6e | 1357 | return "bug"; |
926a0a09 LR |
1358 | } |
1359 | } | |
034c6d6e | 1360 | EXPORT_SYMBOL(reg_initiator_name); |
e702d3cf | 1361 | |
1aeb135f MS |
1362 | static uint32_t reg_rule_to_chan_bw_flags(const struct ieee80211_regdomain *regd, |
1363 | const struct ieee80211_reg_rule *reg_rule, | |
1364 | const struct ieee80211_channel *chan) | |
1365 | { | |
1366 | const struct ieee80211_freq_range *freq_range = NULL; | |
1367 | u32 max_bandwidth_khz, bw_flags = 0; | |
1368 | ||
1369 | freq_range = ®_rule->freq_range; | |
1370 | ||
1371 | max_bandwidth_khz = freq_range->max_bandwidth_khz; | |
1372 | /* Check if auto calculation requested */ | |
1373 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) | |
1374 | max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); | |
1375 | ||
1376 | /* If we get a reg_rule we can assume that at least 5Mhz fit */ | |
4787cfa0 RM |
1377 | if (!cfg80211_does_bw_fit_range(freq_range, |
1378 | MHZ_TO_KHZ(chan->center_freq), | |
1379 | MHZ_TO_KHZ(10))) | |
1aeb135f | 1380 | bw_flags |= IEEE80211_CHAN_NO_10MHZ; |
4787cfa0 RM |
1381 | if (!cfg80211_does_bw_fit_range(freq_range, |
1382 | MHZ_TO_KHZ(chan->center_freq), | |
1383 | MHZ_TO_KHZ(20))) | |
1aeb135f MS |
1384 | bw_flags |= IEEE80211_CHAN_NO_20MHZ; |
1385 | ||
1386 | if (max_bandwidth_khz < MHZ_TO_KHZ(10)) | |
1387 | bw_flags |= IEEE80211_CHAN_NO_10MHZ; | |
1388 | if (max_bandwidth_khz < MHZ_TO_KHZ(20)) | |
1389 | bw_flags |= IEEE80211_CHAN_NO_20MHZ; | |
1390 | if (max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
1391 | bw_flags |= IEEE80211_CHAN_NO_HT40; | |
1392 | if (max_bandwidth_khz < MHZ_TO_KHZ(80)) | |
1393 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; | |
1394 | if (max_bandwidth_khz < MHZ_TO_KHZ(160)) | |
1395 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; | |
1396 | return bw_flags; | |
1397 | } | |
1398 | ||
e33e2241 JB |
1399 | /* |
1400 | * Note that right now we assume the desired channel bandwidth | |
1401 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
1402 | * per channel, the primary and the extension channel). | |
038659e7 | 1403 | */ |
7ca43d03 LR |
1404 | static void handle_channel(struct wiphy *wiphy, |
1405 | enum nl80211_reg_initiator initiator, | |
fdc9d7b2 | 1406 | struct ieee80211_channel *chan) |
b2e1b302 | 1407 | { |
038659e7 | 1408 | u32 flags, bw_flags = 0; |
b2e1b302 LR |
1409 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1410 | const struct ieee80211_power_rule *power_rule = NULL; | |
fe33eb39 | 1411 | struct wiphy *request_wiphy = NULL; |
c492db37 | 1412 | struct regulatory_request *lr = get_last_request(); |
97524820 | 1413 | const struct ieee80211_regdomain *regd; |
a92a3ce7 | 1414 | |
c492db37 | 1415 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
a92a3ce7 LR |
1416 | |
1417 | flags = chan->orig_flags; | |
b2e1b302 | 1418 | |
361c9c8b JB |
1419 | reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); |
1420 | if (IS_ERR(reg_rule)) { | |
ca4ffe8f LR |
1421 | /* |
1422 | * We will disable all channels that do not match our | |
25985edc | 1423 | * received regulatory rule unless the hint is coming |
ca4ffe8f LR |
1424 | * from a Country IE and the Country IE had no information |
1425 | * about a band. The IEEE 802.11 spec allows for an AP | |
1426 | * to send only a subset of the regulatory rules allowed, | |
1427 | * so an AP in the US that only supports 2.4 GHz may only send | |
1428 | * a country IE with information for the 2.4 GHz band | |
1429 | * while 5 GHz is still supported. | |
1430 | */ | |
1431 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
361c9c8b | 1432 | PTR_ERR(reg_rule) == -ERANGE) |
ca4ffe8f LR |
1433 | return; |
1434 | ||
cc493e4f LR |
1435 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
1436 | request_wiphy && request_wiphy == wiphy && | |
a2f73b6c | 1437 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
c799ba6e JB |
1438 | pr_debug("Disabling freq %d MHz for good\n", |
1439 | chan->center_freq); | |
cc493e4f LR |
1440 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; |
1441 | chan->flags = chan->orig_flags; | |
1442 | } else { | |
c799ba6e JB |
1443 | pr_debug("Disabling freq %d MHz\n", |
1444 | chan->center_freq); | |
cc493e4f LR |
1445 | chan->flags |= IEEE80211_CHAN_DISABLED; |
1446 | } | |
8318d78a | 1447 | return; |
ca4ffe8f | 1448 | } |
8318d78a | 1449 | |
b0dfd2ea | 1450 | regd = reg_get_regdomain(wiphy); |
e702d3cf | 1451 | |
b2e1b302 | 1452 | power_rule = ®_rule->power_rule; |
1aeb135f | 1453 | bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan); |
b2e1b302 | 1454 | |
c492db37 | 1455 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 1456 | request_wiphy && request_wiphy == wiphy && |
a2f73b6c | 1457 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
fb1fc7ad | 1458 | /* |
25985edc | 1459 | * This guarantees the driver's requested regulatory domain |
f976376d | 1460 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
1461 | * settings |
1462 | */ | |
f976376d | 1463 | chan->flags = chan->orig_flags = |
038659e7 | 1464 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
1465 | chan->max_antenna_gain = chan->orig_mag = |
1466 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
279f0f55 | 1467 | chan->max_reg_power = chan->max_power = chan->orig_mpwr = |
f976376d | 1468 | (int) MBM_TO_DBM(power_rule->max_eirp); |
4f267c11 JD |
1469 | |
1470 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1471 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1472 | if (reg_rule->dfs_cac_ms) | |
1473 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1474 | } | |
1475 | ||
f976376d LR |
1476 | return; |
1477 | } | |
1478 | ||
04f39047 SW |
1479 | chan->dfs_state = NL80211_DFS_USABLE; |
1480 | chan->dfs_state_entered = jiffies; | |
1481 | ||
aa3d7eef | 1482 | chan->beacon_found = false; |
038659e7 | 1483 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
1a919318 JB |
1484 | chan->max_antenna_gain = |
1485 | min_t(int, chan->orig_mag, | |
1486 | MBI_TO_DBI(power_rule->max_antenna_gain)); | |
eccc068e | 1487 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
089027e5 JD |
1488 | |
1489 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1490 | if (reg_rule->dfs_cac_ms) | |
1491 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1492 | else | |
1493 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1494 | } | |
1495 | ||
5e31fc08 SG |
1496 | if (chan->orig_mpwr) { |
1497 | /* | |
a09a85a0 LR |
1498 | * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER |
1499 | * will always follow the passed country IE power settings. | |
5e31fc08 SG |
1500 | */ |
1501 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a09a85a0 | 1502 | wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER) |
5e31fc08 SG |
1503 | chan->max_power = chan->max_reg_power; |
1504 | else | |
1505 | chan->max_power = min(chan->orig_mpwr, | |
1506 | chan->max_reg_power); | |
1507 | } else | |
1508 | chan->max_power = chan->max_reg_power; | |
8318d78a JB |
1509 | } |
1510 | ||
7ca43d03 | 1511 | static void handle_band(struct wiphy *wiphy, |
fdc9d7b2 JB |
1512 | enum nl80211_reg_initiator initiator, |
1513 | struct ieee80211_supported_band *sband) | |
8318d78a | 1514 | { |
a92a3ce7 | 1515 | unsigned int i; |
a92a3ce7 | 1516 | |
fdc9d7b2 JB |
1517 | if (!sband) |
1518 | return; | |
8318d78a JB |
1519 | |
1520 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1521 | handle_channel(wiphy, initiator, &sband->channels[i]); |
8318d78a JB |
1522 | } |
1523 | ||
57b5ce07 LR |
1524 | static bool reg_request_cell_base(struct regulatory_request *request) |
1525 | { | |
1526 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1527 | return false; | |
1a919318 | 1528 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; |
57b5ce07 LR |
1529 | } |
1530 | ||
1531 | bool reg_last_request_cell_base(void) | |
1532 | { | |
38fd2143 | 1533 | return reg_request_cell_base(get_last_request()); |
57b5ce07 LR |
1534 | } |
1535 | ||
94fc661f | 1536 | #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS |
57b5ce07 | 1537 | /* Core specific check */ |
2f92212b JB |
1538 | static enum reg_request_treatment |
1539 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 | 1540 | { |
c492db37 JB |
1541 | struct regulatory_request *lr = get_last_request(); |
1542 | ||
57b5ce07 | 1543 | if (!reg_num_devs_support_basehint) |
2f92212b | 1544 | return REG_REQ_IGNORE; |
57b5ce07 | 1545 | |
c492db37 | 1546 | if (reg_request_cell_base(lr) && |
1a919318 | 1547 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 1548 | return REG_REQ_ALREADY_SET; |
1a919318 | 1549 | |
2f92212b | 1550 | return REG_REQ_OK; |
57b5ce07 LR |
1551 | } |
1552 | ||
1553 | /* Device specific check */ | |
1554 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
1555 | { | |
1a919318 | 1556 | return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); |
57b5ce07 LR |
1557 | } |
1558 | #else | |
a515de66 JB |
1559 | static enum reg_request_treatment |
1560 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 | 1561 | { |
2f92212b | 1562 | return REG_REQ_IGNORE; |
57b5ce07 | 1563 | } |
1a919318 JB |
1564 | |
1565 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
57b5ce07 LR |
1566 | { |
1567 | return true; | |
1568 | } | |
1569 | #endif | |
1570 | ||
fa1fb9cb LR |
1571 | static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy) |
1572 | { | |
a2f73b6c LR |
1573 | if (wiphy->regulatory_flags & REGULATORY_STRICT_REG && |
1574 | !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)) | |
fa1fb9cb LR |
1575 | return true; |
1576 | return false; | |
1577 | } | |
57b5ce07 | 1578 | |
7db90f4a LR |
1579 | static bool ignore_reg_update(struct wiphy *wiphy, |
1580 | enum nl80211_reg_initiator initiator) | |
14b9815a | 1581 | { |
c492db37 JB |
1582 | struct regulatory_request *lr = get_last_request(); |
1583 | ||
b0d7aa59 JD |
1584 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) |
1585 | return true; | |
1586 | ||
c492db37 | 1587 | if (!lr) { |
c799ba6e JB |
1588 | pr_debug("Ignoring regulatory request set by %s since last_request is not set\n", |
1589 | reg_initiator_name(initiator)); | |
14b9815a | 1590 | return true; |
926a0a09 LR |
1591 | } |
1592 | ||
7db90f4a | 1593 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
a2f73b6c | 1594 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { |
c799ba6e JB |
1595 | pr_debug("Ignoring regulatory request set by %s since the driver uses its own custom regulatory domain\n", |
1596 | reg_initiator_name(initiator)); | |
14b9815a | 1597 | return true; |
926a0a09 LR |
1598 | } |
1599 | ||
fb1fc7ad LR |
1600 | /* |
1601 | * wiphy->regd will be set once the device has its own | |
1602 | * desired regulatory domain set | |
1603 | */ | |
fa1fb9cb | 1604 | if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd && |
749b527b | 1605 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
c492db37 | 1606 | !is_world_regdom(lr->alpha2)) { |
c799ba6e JB |
1607 | pr_debug("Ignoring regulatory request set by %s since the driver requires its own regulatory domain to be set first\n", |
1608 | reg_initiator_name(initiator)); | |
14b9815a | 1609 | return true; |
926a0a09 LR |
1610 | } |
1611 | ||
c492db37 | 1612 | if (reg_request_cell_base(lr)) |
57b5ce07 LR |
1613 | return reg_dev_ignore_cell_hint(wiphy); |
1614 | ||
14b9815a LR |
1615 | return false; |
1616 | } | |
1617 | ||
3195e489 LR |
1618 | static bool reg_is_world_roaming(struct wiphy *wiphy) |
1619 | { | |
1620 | const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); | |
1621 | const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); | |
1622 | struct regulatory_request *lr = get_last_request(); | |
1623 | ||
1624 | if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) | |
1625 | return true; | |
1626 | ||
1627 | if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a2f73b6c | 1628 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
3195e489 LR |
1629 | return true; |
1630 | ||
1631 | return false; | |
1632 | } | |
1633 | ||
1a919318 | 1634 | static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, |
e38f8a7a LR |
1635 | struct reg_beacon *reg_beacon) |
1636 | { | |
e38f8a7a LR |
1637 | struct ieee80211_supported_band *sband; |
1638 | struct ieee80211_channel *chan; | |
6bad8766 LR |
1639 | bool channel_changed = false; |
1640 | struct ieee80211_channel chan_before; | |
e38f8a7a | 1641 | |
e38f8a7a LR |
1642 | sband = wiphy->bands[reg_beacon->chan.band]; |
1643 | chan = &sband->channels[chan_idx]; | |
1644 | ||
1645 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1646 | return; | |
1647 | ||
6bad8766 LR |
1648 | if (chan->beacon_found) |
1649 | return; | |
1650 | ||
1651 | chan->beacon_found = true; | |
1652 | ||
0f500a5f LR |
1653 | if (!reg_is_world_roaming(wiphy)) |
1654 | return; | |
1655 | ||
a2f73b6c | 1656 | if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS) |
37184244 LR |
1657 | return; |
1658 | ||
6bad8766 LR |
1659 | chan_before.center_freq = chan->center_freq; |
1660 | chan_before.flags = chan->flags; | |
1661 | ||
8fe02e16 LR |
1662 | if (chan->flags & IEEE80211_CHAN_NO_IR) { |
1663 | chan->flags &= ~IEEE80211_CHAN_NO_IR; | |
6bad8766 | 1664 | channel_changed = true; |
e38f8a7a LR |
1665 | } |
1666 | ||
6bad8766 LR |
1667 | if (channel_changed) |
1668 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1669 | } |
1670 | ||
1671 | /* | |
1672 | * Called when a scan on a wiphy finds a beacon on | |
1673 | * new channel | |
1674 | */ | |
1675 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1676 | struct reg_beacon *reg_beacon) | |
1677 | { | |
1678 | unsigned int i; | |
1679 | struct ieee80211_supported_band *sband; | |
1680 | ||
e38f8a7a LR |
1681 | if (!wiphy->bands[reg_beacon->chan.band]) |
1682 | return; | |
1683 | ||
1684 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1685 | ||
1686 | for (i = 0; i < sband->n_channels; i++) | |
1687 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1688 | } | |
1689 | ||
1690 | /* | |
1691 | * Called upon reg changes or a new wiphy is added | |
1692 | */ | |
1693 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1694 | { | |
1695 | unsigned int i; | |
1696 | struct ieee80211_supported_band *sband; | |
1697 | struct reg_beacon *reg_beacon; | |
1698 | ||
e38f8a7a LR |
1699 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
1700 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1701 | continue; | |
1702 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1703 | for (i = 0; i < sband->n_channels; i++) | |
1704 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1705 | } | |
1706 | } | |
1707 | ||
e38f8a7a LR |
1708 | /* Reap the advantages of previously found beacons */ |
1709 | static void reg_process_beacons(struct wiphy *wiphy) | |
1710 | { | |
b1ed8ddd LR |
1711 | /* |
1712 | * Means we are just firing up cfg80211, so no beacons would | |
1713 | * have been processed yet. | |
1714 | */ | |
1715 | if (!last_request) | |
1716 | return; | |
e38f8a7a LR |
1717 | wiphy_update_beacon_reg(wiphy); |
1718 | } | |
1719 | ||
1a919318 | 1720 | static bool is_ht40_allowed(struct ieee80211_channel *chan) |
038659e7 LR |
1721 | { |
1722 | if (!chan) | |
1a919318 | 1723 | return false; |
038659e7 | 1724 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
1a919318 | 1725 | return false; |
038659e7 | 1726 | /* This would happen when regulatory rules disallow HT40 completely */ |
55b183ad FF |
1727 | if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) |
1728 | return false; | |
1729 | return true; | |
038659e7 LR |
1730 | } |
1731 | ||
1732 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
fdc9d7b2 | 1733 | struct ieee80211_channel *channel) |
038659e7 | 1734 | { |
fdc9d7b2 | 1735 | struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; |
038659e7 | 1736 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
4e0854a7 | 1737 | const struct ieee80211_regdomain *regd; |
038659e7 | 1738 | unsigned int i; |
4e0854a7 | 1739 | u32 flags; |
038659e7 | 1740 | |
1a919318 | 1741 | if (!is_ht40_allowed(channel)) { |
038659e7 LR |
1742 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
1743 | return; | |
1744 | } | |
1745 | ||
1746 | /* | |
1747 | * We need to ensure the extension channels exist to | |
1748 | * be able to use HT40- or HT40+, this finds them (or not) | |
1749 | */ | |
1750 | for (i = 0; i < sband->n_channels; i++) { | |
1751 | struct ieee80211_channel *c = &sband->channels[i]; | |
1a919318 | 1752 | |
038659e7 LR |
1753 | if (c->center_freq == (channel->center_freq - 20)) |
1754 | channel_before = c; | |
1755 | if (c->center_freq == (channel->center_freq + 20)) | |
1756 | channel_after = c; | |
1757 | } | |
1758 | ||
4e0854a7 EG |
1759 | flags = 0; |
1760 | regd = get_wiphy_regdom(wiphy); | |
1761 | if (regd) { | |
1762 | const struct ieee80211_reg_rule *reg_rule = | |
1763 | freq_reg_info_regd(MHZ_TO_KHZ(channel->center_freq), | |
1764 | regd, MHZ_TO_KHZ(20)); | |
1765 | ||
1766 | if (!IS_ERR(reg_rule)) | |
1767 | flags = reg_rule->flags; | |
1768 | } | |
1769 | ||
038659e7 LR |
1770 | /* |
1771 | * Please note that this assumes target bandwidth is 20 MHz, | |
1772 | * if that ever changes we also need to change the below logic | |
1773 | * to include that as well. | |
1774 | */ | |
4e0854a7 EG |
1775 | if (!is_ht40_allowed(channel_before) || |
1776 | flags & NL80211_RRF_NO_HT40MINUS) | |
689da1b3 | 1777 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1778 | else |
689da1b3 | 1779 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1780 | |
4e0854a7 EG |
1781 | if (!is_ht40_allowed(channel_after) || |
1782 | flags & NL80211_RRF_NO_HT40PLUS) | |
689da1b3 | 1783 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 1784 | else |
689da1b3 | 1785 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
1786 | } |
1787 | ||
1788 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
fdc9d7b2 | 1789 | struct ieee80211_supported_band *sband) |
038659e7 LR |
1790 | { |
1791 | unsigned int i; | |
038659e7 | 1792 | |
fdc9d7b2 JB |
1793 | if (!sband) |
1794 | return; | |
038659e7 LR |
1795 | |
1796 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1797 | reg_process_ht_flags_channel(wiphy, &sband->channels[i]); |
038659e7 LR |
1798 | } |
1799 | ||
1800 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1801 | { | |
57fbcce3 | 1802 | enum nl80211_band band; |
038659e7 LR |
1803 | |
1804 | if (!wiphy) | |
1805 | return; | |
1806 | ||
57fbcce3 | 1807 | for (band = 0; band < NUM_NL80211_BANDS; band++) |
fdc9d7b2 | 1808 | reg_process_ht_flags_band(wiphy, wiphy->bands[band]); |
038659e7 LR |
1809 | } |
1810 | ||
0e3802db LR |
1811 | static void reg_call_notifier(struct wiphy *wiphy, |
1812 | struct regulatory_request *request) | |
1813 | { | |
1814 | if (wiphy->reg_notifier) | |
1815 | wiphy->reg_notifier(wiphy, request); | |
1816 | } | |
1817 | ||
ad932f04 AN |
1818 | static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev) |
1819 | { | |
ad932f04 AN |
1820 | struct cfg80211_chan_def chandef; |
1821 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); | |
20658702 | 1822 | enum nl80211_iftype iftype; |
ad932f04 AN |
1823 | |
1824 | wdev_lock(wdev); | |
20658702 | 1825 | iftype = wdev->iftype; |
ad932f04 | 1826 | |
20658702 | 1827 | /* make sure the interface is active */ |
ad932f04 | 1828 | if (!wdev->netdev || !netif_running(wdev->netdev)) |
20658702 | 1829 | goto wdev_inactive_unlock; |
ad932f04 | 1830 | |
20658702 | 1831 | switch (iftype) { |
ad932f04 AN |
1832 | case NL80211_IFTYPE_AP: |
1833 | case NL80211_IFTYPE_P2P_GO: | |
1834 | if (!wdev->beacon_interval) | |
20658702 AN |
1835 | goto wdev_inactive_unlock; |
1836 | chandef = wdev->chandef; | |
185076d6 AN |
1837 | break; |
1838 | case NL80211_IFTYPE_ADHOC: | |
1839 | if (!wdev->ssid_len) | |
20658702 AN |
1840 | goto wdev_inactive_unlock; |
1841 | chandef = wdev->chandef; | |
ad932f04 AN |
1842 | break; |
1843 | case NL80211_IFTYPE_STATION: | |
1844 | case NL80211_IFTYPE_P2P_CLIENT: | |
ad932f04 AN |
1845 | if (!wdev->current_bss || |
1846 | !wdev->current_bss->pub.channel) | |
20658702 | 1847 | goto wdev_inactive_unlock; |
ad932f04 | 1848 | |
20658702 AN |
1849 | if (!rdev->ops->get_channel || |
1850 | rdev_get_channel(rdev, wdev, &chandef)) | |
1851 | cfg80211_chandef_create(&chandef, | |
1852 | wdev->current_bss->pub.channel, | |
1853 | NL80211_CHAN_NO_HT); | |
ad932f04 AN |
1854 | break; |
1855 | case NL80211_IFTYPE_MONITOR: | |
1856 | case NL80211_IFTYPE_AP_VLAN: | |
1857 | case NL80211_IFTYPE_P2P_DEVICE: | |
1858 | /* no enforcement required */ | |
1859 | break; | |
1860 | default: | |
1861 | /* others not implemented for now */ | |
1862 | WARN_ON(1); | |
1863 | break; | |
1864 | } | |
1865 | ||
ad932f04 | 1866 | wdev_unlock(wdev); |
20658702 AN |
1867 | |
1868 | switch (iftype) { | |
1869 | case NL80211_IFTYPE_AP: | |
1870 | case NL80211_IFTYPE_P2P_GO: | |
1871 | case NL80211_IFTYPE_ADHOC: | |
923b352f | 1872 | return cfg80211_reg_can_beacon_relax(wiphy, &chandef, iftype); |
20658702 AN |
1873 | case NL80211_IFTYPE_STATION: |
1874 | case NL80211_IFTYPE_P2P_CLIENT: | |
1875 | return cfg80211_chandef_usable(wiphy, &chandef, | |
1876 | IEEE80211_CHAN_DISABLED); | |
1877 | default: | |
1878 | break; | |
1879 | } | |
1880 | ||
1881 | return true; | |
1882 | ||
1883 | wdev_inactive_unlock: | |
1884 | wdev_unlock(wdev); | |
1885 | return true; | |
ad932f04 AN |
1886 | } |
1887 | ||
1888 | static void reg_leave_invalid_chans(struct wiphy *wiphy) | |
1889 | { | |
1890 | struct wireless_dev *wdev; | |
1891 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); | |
1892 | ||
1893 | ASSERT_RTNL(); | |
1894 | ||
53873f13 | 1895 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) |
ad932f04 AN |
1896 | if (!reg_wdev_chan_valid(wiphy, wdev)) |
1897 | cfg80211_leave(rdev, wdev); | |
1898 | } | |
1899 | ||
1900 | static void reg_check_chans_work(struct work_struct *work) | |
1901 | { | |
1902 | struct cfg80211_registered_device *rdev; | |
1903 | ||
c799ba6e | 1904 | pr_debug("Verifying active interfaces after reg change\n"); |
ad932f04 AN |
1905 | rtnl_lock(); |
1906 | ||
1907 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) | |
1908 | if (!(rdev->wiphy.regulatory_flags & | |
1909 | REGULATORY_IGNORE_STALE_KICKOFF)) | |
1910 | reg_leave_invalid_chans(&rdev->wiphy); | |
1911 | ||
1912 | rtnl_unlock(); | |
1913 | } | |
1914 | ||
1915 | static void reg_check_channels(void) | |
1916 | { | |
1917 | /* | |
1918 | * Give usermode a chance to do something nicer (move to another | |
1919 | * channel, orderly disconnection), before forcing a disconnection. | |
1920 | */ | |
1921 | mod_delayed_work(system_power_efficient_wq, | |
1922 | ®_check_chans, | |
1923 | msecs_to_jiffies(REG_ENFORCE_GRACE_MS)); | |
1924 | } | |
1925 | ||
eac03e38 SN |
1926 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
1927 | enum nl80211_reg_initiator initiator) | |
b2e1b302 | 1928 | { |
57fbcce3 | 1929 | enum nl80211_band band; |
c492db37 | 1930 | struct regulatory_request *lr = get_last_request(); |
eac03e38 | 1931 | |
0e3802db LR |
1932 | if (ignore_reg_update(wiphy, initiator)) { |
1933 | /* | |
1934 | * Regulatory updates set by CORE are ignored for custom | |
1935 | * regulatory cards. Let us notify the changes to the driver, | |
1936 | * as some drivers used this to restore its orig_* reg domain. | |
1937 | */ | |
1938 | if (initiator == NL80211_REGDOM_SET_BY_CORE && | |
a2f73b6c | 1939 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
0e3802db | 1940 | reg_call_notifier(wiphy, lr); |
a203c2aa | 1941 | return; |
0e3802db | 1942 | } |
a203c2aa | 1943 | |
c492db37 | 1944 | lr->dfs_region = get_cfg80211_regdom()->dfs_region; |
b68e6b3b | 1945 | |
57fbcce3 | 1946 | for (band = 0; band < NUM_NL80211_BANDS; band++) |
fdc9d7b2 | 1947 | handle_band(wiphy, initiator, wiphy->bands[band]); |
a203c2aa | 1948 | |
e38f8a7a | 1949 | reg_process_beacons(wiphy); |
038659e7 | 1950 | reg_process_ht_flags(wiphy); |
0e3802db | 1951 | reg_call_notifier(wiphy, lr); |
b2e1b302 LR |
1952 | } |
1953 | ||
d7549cbb SN |
1954 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
1955 | { | |
1956 | struct cfg80211_registered_device *rdev; | |
4a38994f | 1957 | struct wiphy *wiphy; |
d7549cbb | 1958 | |
5fe231e8 | 1959 | ASSERT_RTNL(); |
458f4f9e | 1960 | |
4a38994f RM |
1961 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1962 | wiphy = &rdev->wiphy; | |
1963 | wiphy_update_regulatory(wiphy, initiator); | |
4a38994f | 1964 | } |
ad932f04 AN |
1965 | |
1966 | reg_check_channels(); | |
d7549cbb SN |
1967 | } |
1968 | ||
1fa25e41 | 1969 | static void handle_channel_custom(struct wiphy *wiphy, |
fdc9d7b2 | 1970 | struct ieee80211_channel *chan, |
1fa25e41 LR |
1971 | const struct ieee80211_regdomain *regd) |
1972 | { | |
038659e7 | 1973 | u32 bw_flags = 0; |
1fa25e41 LR |
1974 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1975 | const struct ieee80211_power_rule *power_rule = NULL; | |
4edd5698 | 1976 | u32 bw; |
ac46d48e | 1977 | |
4edd5698 | 1978 | for (bw = MHZ_TO_KHZ(20); bw >= MHZ_TO_KHZ(5); bw = bw / 2) { |
49172874 | 1979 | reg_rule = freq_reg_info_regd(MHZ_TO_KHZ(chan->center_freq), |
4edd5698 MM |
1980 | regd, bw); |
1981 | if (!IS_ERR(reg_rule)) | |
1982 | break; | |
1983 | } | |
1fa25e41 | 1984 | |
361c9c8b | 1985 | if (IS_ERR(reg_rule)) { |
c799ba6e JB |
1986 | pr_debug("Disabling freq %d MHz as custom regd has no rule that fits it\n", |
1987 | chan->center_freq); | |
db8dfee5 AN |
1988 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) { |
1989 | chan->flags |= IEEE80211_CHAN_DISABLED; | |
1990 | } else { | |
1991 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; | |
1992 | chan->flags = chan->orig_flags; | |
1993 | } | |
1fa25e41 LR |
1994 | return; |
1995 | } | |
1996 | ||
1997 | power_rule = ®_rule->power_rule; | |
1aeb135f | 1998 | bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan); |
1fa25e41 | 1999 | |
2e18b38f | 2000 | chan->dfs_state_entered = jiffies; |
c7ab5081 AN |
2001 | chan->dfs_state = NL80211_DFS_USABLE; |
2002 | ||
2003 | chan->beacon_found = false; | |
db8dfee5 AN |
2004 | |
2005 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) | |
2006 | chan->flags = chan->orig_flags | bw_flags | | |
2007 | map_regdom_flags(reg_rule->flags); | |
2008 | else | |
2009 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; | |
2010 | ||
1fa25e41 | 2011 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
279f0f55 FF |
2012 | chan->max_reg_power = chan->max_power = |
2013 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
2e18b38f AN |
2014 | |
2015 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
2016 | if (reg_rule->dfs_cac_ms) | |
2017 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
2018 | else | |
2019 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
2020 | } | |
2021 | ||
2022 | chan->max_power = chan->max_reg_power; | |
1fa25e41 LR |
2023 | } |
2024 | ||
fdc9d7b2 JB |
2025 | static void handle_band_custom(struct wiphy *wiphy, |
2026 | struct ieee80211_supported_band *sband, | |
1fa25e41 LR |
2027 | const struct ieee80211_regdomain *regd) |
2028 | { | |
2029 | unsigned int i; | |
1fa25e41 | 2030 | |
fdc9d7b2 JB |
2031 | if (!sband) |
2032 | return; | |
1fa25e41 LR |
2033 | |
2034 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 2035 | handle_channel_custom(wiphy, &sband->channels[i], regd); |
1fa25e41 LR |
2036 | } |
2037 | ||
2038 | /* Used by drivers prior to wiphy registration */ | |
2039 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
2040 | const struct ieee80211_regdomain *regd) | |
2041 | { | |
57fbcce3 | 2042 | enum nl80211_band band; |
bbcf3f02 | 2043 | unsigned int bands_set = 0; |
ac46d48e | 2044 | |
a2f73b6c LR |
2045 | WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG), |
2046 | "wiphy should have REGULATORY_CUSTOM_REG\n"); | |
2047 | wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG; | |
222ea581 | 2048 | |
57fbcce3 | 2049 | for (band = 0; band < NUM_NL80211_BANDS; band++) { |
bbcf3f02 LR |
2050 | if (!wiphy->bands[band]) |
2051 | continue; | |
fdc9d7b2 | 2052 | handle_band_custom(wiphy, wiphy->bands[band], regd); |
bbcf3f02 | 2053 | bands_set++; |
b2e1b302 | 2054 | } |
bbcf3f02 LR |
2055 | |
2056 | /* | |
2057 | * no point in calling this if it won't have any effect | |
1a919318 | 2058 | * on your device's supported bands. |
bbcf3f02 LR |
2059 | */ |
2060 | WARN_ON(!bands_set); | |
b2e1b302 | 2061 | } |
1fa25e41 LR |
2062 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
2063 | ||
b2e253cf LR |
2064 | static void reg_set_request_processed(void) |
2065 | { | |
2066 | bool need_more_processing = false; | |
c492db37 | 2067 | struct regulatory_request *lr = get_last_request(); |
b2e253cf | 2068 | |
c492db37 | 2069 | lr->processed = true; |
b2e253cf LR |
2070 | |
2071 | spin_lock(®_requests_lock); | |
2072 | if (!list_empty(®_requests_list)) | |
2073 | need_more_processing = true; | |
2074 | spin_unlock(®_requests_lock); | |
2075 | ||
b6863036 | 2076 | cancel_crda_timeout(); |
a90c7a31 | 2077 | |
b2e253cf LR |
2078 | if (need_more_processing) |
2079 | schedule_work(®_work); | |
2080 | } | |
2081 | ||
b3eb7f3f LR |
2082 | /** |
2083 | * reg_process_hint_core - process core regulatory requests | |
2084 | * @pending_request: a pending core regulatory request | |
2085 | * | |
2086 | * The wireless subsystem can use this function to process | |
2087 | * a regulatory request issued by the regulatory core. | |
b3eb7f3f | 2088 | */ |
d34265a3 JB |
2089 | static enum reg_request_treatment |
2090 | reg_process_hint_core(struct regulatory_request *core_request) | |
b3eb7f3f | 2091 | { |
cecbb069 | 2092 | if (reg_query_database(core_request)) { |
25b20dbd JB |
2093 | core_request->intersect = false; |
2094 | core_request->processed = false; | |
2095 | reg_update_last_request(core_request); | |
d34265a3 | 2096 | return REG_REQ_OK; |
25b20dbd | 2097 | } |
d34265a3 JB |
2098 | |
2099 | return REG_REQ_IGNORE; | |
b3eb7f3f LR |
2100 | } |
2101 | ||
0d97a619 LR |
2102 | static enum reg_request_treatment |
2103 | __reg_process_hint_user(struct regulatory_request *user_request) | |
2104 | { | |
2105 | struct regulatory_request *lr = get_last_request(); | |
2106 | ||
2107 | if (reg_request_cell_base(user_request)) | |
2108 | return reg_ignore_cell_hint(user_request); | |
2109 | ||
2110 | if (reg_request_cell_base(lr)) | |
2111 | return REG_REQ_IGNORE; | |
2112 | ||
2113 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
2114 | return REG_REQ_INTERSECT; | |
2115 | /* | |
2116 | * If the user knows better the user should set the regdom | |
2117 | * to their country before the IE is picked up | |
2118 | */ | |
2119 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER && | |
2120 | lr->intersect) | |
2121 | return REG_REQ_IGNORE; | |
2122 | /* | |
2123 | * Process user requests only after previous user/driver/core | |
2124 | * requests have been processed | |
2125 | */ | |
2126 | if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || | |
2127 | lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
2128 | lr->initiator == NL80211_REGDOM_SET_BY_USER) && | |
2129 | regdom_changes(lr->alpha2)) | |
2130 | return REG_REQ_IGNORE; | |
2131 | ||
2132 | if (!regdom_changes(user_request->alpha2)) | |
2133 | return REG_REQ_ALREADY_SET; | |
2134 | ||
2135 | return REG_REQ_OK; | |
2136 | } | |
2137 | ||
2138 | /** | |
2139 | * reg_process_hint_user - process user regulatory requests | |
2140 | * @user_request: a pending user regulatory request | |
2141 | * | |
2142 | * The wireless subsystem can use this function to process | |
2143 | * a regulatory request initiated by userspace. | |
0d97a619 | 2144 | */ |
d34265a3 JB |
2145 | static enum reg_request_treatment |
2146 | reg_process_hint_user(struct regulatory_request *user_request) | |
0d97a619 LR |
2147 | { |
2148 | enum reg_request_treatment treatment; | |
0d97a619 LR |
2149 | |
2150 | treatment = __reg_process_hint_user(user_request); | |
2151 | if (treatment == REG_REQ_IGNORE || | |
d34265a3 JB |
2152 | treatment == REG_REQ_ALREADY_SET) |
2153 | return REG_REQ_IGNORE; | |
0d97a619 | 2154 | |
0d97a619 LR |
2155 | user_request->intersect = treatment == REG_REQ_INTERSECT; |
2156 | user_request->processed = false; | |
5ad6ef5e | 2157 | |
cecbb069 | 2158 | if (reg_query_database(user_request)) { |
25b20dbd JB |
2159 | reg_update_last_request(user_request); |
2160 | user_alpha2[0] = user_request->alpha2[0]; | |
2161 | user_alpha2[1] = user_request->alpha2[1]; | |
d34265a3 | 2162 | return REG_REQ_OK; |
25b20dbd | 2163 | } |
d34265a3 JB |
2164 | |
2165 | return REG_REQ_IGNORE; | |
0d97a619 LR |
2166 | } |
2167 | ||
21636c7f LR |
2168 | static enum reg_request_treatment |
2169 | __reg_process_hint_driver(struct regulatory_request *driver_request) | |
2170 | { | |
2171 | struct regulatory_request *lr = get_last_request(); | |
2172 | ||
2173 | if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { | |
2174 | if (regdom_changes(driver_request->alpha2)) | |
2175 | return REG_REQ_OK; | |
2176 | return REG_REQ_ALREADY_SET; | |
2177 | } | |
2178 | ||
2179 | /* | |
2180 | * This would happen if you unplug and plug your card | |
2181 | * back in or if you add a new device for which the previously | |
2182 | * loaded card also agrees on the regulatory domain. | |
2183 | */ | |
2184 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && | |
2185 | !regdom_changes(driver_request->alpha2)) | |
2186 | return REG_REQ_ALREADY_SET; | |
2187 | ||
2188 | return REG_REQ_INTERSECT; | |
2189 | } | |
2190 | ||
2191 | /** | |
2192 | * reg_process_hint_driver - process driver regulatory requests | |
2193 | * @driver_request: a pending driver regulatory request | |
2194 | * | |
2195 | * The wireless subsystem can use this function to process | |
2196 | * a regulatory request issued by an 802.11 driver. | |
2197 | * | |
2198 | * Returns one of the different reg request treatment values. | |
2199 | */ | |
2200 | static enum reg_request_treatment | |
2201 | reg_process_hint_driver(struct wiphy *wiphy, | |
2202 | struct regulatory_request *driver_request) | |
2203 | { | |
34f05f54 | 2204 | const struct ieee80211_regdomain *regd, *tmp; |
21636c7f | 2205 | enum reg_request_treatment treatment; |
21636c7f LR |
2206 | |
2207 | treatment = __reg_process_hint_driver(driver_request); | |
2208 | ||
2209 | switch (treatment) { | |
2210 | case REG_REQ_OK: | |
2211 | break; | |
2212 | case REG_REQ_IGNORE: | |
d34265a3 | 2213 | return REG_REQ_IGNORE; |
21636c7f | 2214 | case REG_REQ_INTERSECT: |
21636c7f LR |
2215 | case REG_REQ_ALREADY_SET: |
2216 | regd = reg_copy_regd(get_cfg80211_regdom()); | |
d34265a3 JB |
2217 | if (IS_ERR(regd)) |
2218 | return REG_REQ_IGNORE; | |
34f05f54 AN |
2219 | |
2220 | tmp = get_wiphy_regdom(wiphy); | |
21636c7f | 2221 | rcu_assign_pointer(wiphy->regd, regd); |
34f05f54 | 2222 | rcu_free_regdom(tmp); |
21636c7f LR |
2223 | } |
2224 | ||
21636c7f LR |
2225 | |
2226 | driver_request->intersect = treatment == REG_REQ_INTERSECT; | |
2227 | driver_request->processed = false; | |
5ad6ef5e | 2228 | |
21636c7f LR |
2229 | /* |
2230 | * Since CRDA will not be called in this case as we already | |
2231 | * have applied the requested regulatory domain before we just | |
2232 | * inform userspace we have processed the request | |
2233 | */ | |
2234 | if (treatment == REG_REQ_ALREADY_SET) { | |
2235 | nl80211_send_reg_change_event(driver_request); | |
25b20dbd | 2236 | reg_update_last_request(driver_request); |
21636c7f | 2237 | reg_set_request_processed(); |
480908a7 | 2238 | return REG_REQ_ALREADY_SET; |
21636c7f LR |
2239 | } |
2240 | ||
d34265a3 | 2241 | if (reg_query_database(driver_request)) { |
25b20dbd | 2242 | reg_update_last_request(driver_request); |
d34265a3 JB |
2243 | return REG_REQ_OK; |
2244 | } | |
25b20dbd | 2245 | |
d34265a3 | 2246 | return REG_REQ_IGNORE; |
21636c7f LR |
2247 | } |
2248 | ||
b23e7a9e LR |
2249 | static enum reg_request_treatment |
2250 | __reg_process_hint_country_ie(struct wiphy *wiphy, | |
2251 | struct regulatory_request *country_ie_request) | |
2252 | { | |
2253 | struct wiphy *last_wiphy = NULL; | |
2254 | struct regulatory_request *lr = get_last_request(); | |
2255 | ||
2256 | if (reg_request_cell_base(lr)) { | |
2257 | /* Trust a Cell base station over the AP's country IE */ | |
2258 | if (regdom_changes(country_ie_request->alpha2)) | |
2259 | return REG_REQ_IGNORE; | |
2260 | return REG_REQ_ALREADY_SET; | |
2a901468 LR |
2261 | } else { |
2262 | if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE) | |
2263 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
2264 | } |
2265 | ||
b23e7a9e LR |
2266 | if (unlikely(!is_an_alpha2(country_ie_request->alpha2))) |
2267 | return -EINVAL; | |
2f1c6c57 LR |
2268 | |
2269 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
2270 | return REG_REQ_OK; | |
2271 | ||
2272 | last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
2273 | ||
2274 | if (last_wiphy != wiphy) { | |
b23e7a9e | 2275 | /* |
2f1c6c57 LR |
2276 | * Two cards with two APs claiming different |
2277 | * Country IE alpha2s. We could | |
2278 | * intersect them, but that seems unlikely | |
2279 | * to be correct. Reject second one for now. | |
b23e7a9e | 2280 | */ |
2f1c6c57 LR |
2281 | if (regdom_changes(country_ie_request->alpha2)) |
2282 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
2283 | return REG_REQ_ALREADY_SET; |
2284 | } | |
70dcec5a EG |
2285 | |
2286 | if (regdom_changes(country_ie_request->alpha2)) | |
2f1c6c57 LR |
2287 | return REG_REQ_OK; |
2288 | return REG_REQ_ALREADY_SET; | |
b23e7a9e LR |
2289 | } |
2290 | ||
d1c96a9a | 2291 | /** |
b23e7a9e LR |
2292 | * reg_process_hint_country_ie - process regulatory requests from country IEs |
2293 | * @country_ie_request: a regulatory request from a country IE | |
d1c96a9a | 2294 | * |
b23e7a9e LR |
2295 | * The wireless subsystem can use this function to process |
2296 | * a regulatory request issued by a country Information Element. | |
d1c96a9a | 2297 | * |
2f92212b | 2298 | * Returns one of the different reg request treatment values. |
d1c96a9a | 2299 | */ |
2f92212b | 2300 | static enum reg_request_treatment |
b23e7a9e LR |
2301 | reg_process_hint_country_ie(struct wiphy *wiphy, |
2302 | struct regulatory_request *country_ie_request) | |
b2e1b302 | 2303 | { |
2f92212b | 2304 | enum reg_request_treatment treatment; |
761cf7ec | 2305 | |
b23e7a9e | 2306 | treatment = __reg_process_hint_country_ie(wiphy, country_ie_request); |
9c96477d | 2307 | |
2f92212b | 2308 | switch (treatment) { |
2f92212b JB |
2309 | case REG_REQ_OK: |
2310 | break; | |
b23e7a9e | 2311 | case REG_REQ_IGNORE: |
d34265a3 | 2312 | return REG_REQ_IGNORE; |
b23e7a9e | 2313 | case REG_REQ_ALREADY_SET: |
c888393b | 2314 | reg_free_request(country_ie_request); |
480908a7 | 2315 | return REG_REQ_ALREADY_SET; |
b23e7a9e | 2316 | case REG_REQ_INTERSECT: |
fb1fc7ad | 2317 | /* |
b23e7a9e LR |
2318 | * This doesn't happen yet, not sure we |
2319 | * ever want to support it for this case. | |
fb1fc7ad | 2320 | */ |
b23e7a9e | 2321 | WARN_ONCE(1, "Unexpected intersection for country IEs"); |
d34265a3 | 2322 | return REG_REQ_IGNORE; |
3e0c3ff3 | 2323 | } |
b2e1b302 | 2324 | |
b23e7a9e LR |
2325 | country_ie_request->intersect = false; |
2326 | country_ie_request->processed = false; | |
5ad6ef5e | 2327 | |
d34265a3 | 2328 | if (reg_query_database(country_ie_request)) { |
25b20dbd | 2329 | reg_update_last_request(country_ie_request); |
d34265a3 JB |
2330 | return REG_REQ_OK; |
2331 | } | |
3e0c3ff3 | 2332 | |
d34265a3 | 2333 | return REG_REQ_IGNORE; |
b2e1b302 LR |
2334 | } |
2335 | ||
89766727 VT |
2336 | bool reg_dfs_domain_same(struct wiphy *wiphy1, struct wiphy *wiphy2) |
2337 | { | |
2338 | const struct ieee80211_regdomain *wiphy1_regd = NULL; | |
2339 | const struct ieee80211_regdomain *wiphy2_regd = NULL; | |
2340 | const struct ieee80211_regdomain *cfg80211_regd = NULL; | |
2341 | bool dfs_domain_same; | |
2342 | ||
2343 | rcu_read_lock(); | |
2344 | ||
2345 | cfg80211_regd = rcu_dereference(cfg80211_regdomain); | |
2346 | wiphy1_regd = rcu_dereference(wiphy1->regd); | |
2347 | if (!wiphy1_regd) | |
2348 | wiphy1_regd = cfg80211_regd; | |
2349 | ||
2350 | wiphy2_regd = rcu_dereference(wiphy2->regd); | |
2351 | if (!wiphy2_regd) | |
2352 | wiphy2_regd = cfg80211_regd; | |
2353 | ||
2354 | dfs_domain_same = wiphy1_regd->dfs_region == wiphy2_regd->dfs_region; | |
2355 | ||
2356 | rcu_read_unlock(); | |
2357 | ||
2358 | return dfs_domain_same; | |
2359 | } | |
2360 | ||
2361 | static void reg_copy_dfs_chan_state(struct ieee80211_channel *dst_chan, | |
2362 | struct ieee80211_channel *src_chan) | |
2363 | { | |
2364 | if (!(dst_chan->flags & IEEE80211_CHAN_RADAR) || | |
2365 | !(src_chan->flags & IEEE80211_CHAN_RADAR)) | |
2366 | return; | |
2367 | ||
2368 | if (dst_chan->flags & IEEE80211_CHAN_DISABLED || | |
2369 | src_chan->flags & IEEE80211_CHAN_DISABLED) | |
2370 | return; | |
2371 | ||
2372 | if (src_chan->center_freq == dst_chan->center_freq && | |
2373 | dst_chan->dfs_state == NL80211_DFS_USABLE) { | |
2374 | dst_chan->dfs_state = src_chan->dfs_state; | |
2375 | dst_chan->dfs_state_entered = src_chan->dfs_state_entered; | |
2376 | } | |
2377 | } | |
2378 | ||
2379 | static void wiphy_share_dfs_chan_state(struct wiphy *dst_wiphy, | |
2380 | struct wiphy *src_wiphy) | |
2381 | { | |
2382 | struct ieee80211_supported_band *src_sband, *dst_sband; | |
2383 | struct ieee80211_channel *src_chan, *dst_chan; | |
2384 | int i, j, band; | |
2385 | ||
2386 | if (!reg_dfs_domain_same(dst_wiphy, src_wiphy)) | |
2387 | return; | |
2388 | ||
2389 | for (band = 0; band < NUM_NL80211_BANDS; band++) { | |
2390 | dst_sband = dst_wiphy->bands[band]; | |
2391 | src_sband = src_wiphy->bands[band]; | |
2392 | if (!dst_sband || !src_sband) | |
2393 | continue; | |
2394 | ||
2395 | for (i = 0; i < dst_sband->n_channels; i++) { | |
2396 | dst_chan = &dst_sband->channels[i]; | |
2397 | for (j = 0; j < src_sband->n_channels; j++) { | |
2398 | src_chan = &src_sband->channels[j]; | |
2399 | reg_copy_dfs_chan_state(dst_chan, src_chan); | |
2400 | } | |
2401 | } | |
2402 | } | |
2403 | } | |
2404 | ||
2405 | static void wiphy_all_share_dfs_chan_state(struct wiphy *wiphy) | |
2406 | { | |
2407 | struct cfg80211_registered_device *rdev; | |
2408 | ||
2409 | ASSERT_RTNL(); | |
2410 | ||
2411 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
2412 | if (wiphy == &rdev->wiphy) | |
2413 | continue; | |
2414 | wiphy_share_dfs_chan_state(wiphy, &rdev->wiphy); | |
2415 | } | |
2416 | } | |
2417 | ||
30a548c7 | 2418 | /* This processes *all* regulatory hints */ |
1daa37c7 | 2419 | static void reg_process_hint(struct regulatory_request *reg_request) |
fe33eb39 | 2420 | { |
fe33eb39 | 2421 | struct wiphy *wiphy = NULL; |
b3eb7f3f | 2422 | enum reg_request_treatment treatment; |
fe33eb39 | 2423 | |
f4173766 | 2424 | if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) |
fe33eb39 LR |
2425 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
2426 | ||
b3eb7f3f LR |
2427 | switch (reg_request->initiator) { |
2428 | case NL80211_REGDOM_SET_BY_CORE: | |
d34265a3 JB |
2429 | treatment = reg_process_hint_core(reg_request); |
2430 | break; | |
b3eb7f3f | 2431 | case NL80211_REGDOM_SET_BY_USER: |
d34265a3 JB |
2432 | treatment = reg_process_hint_user(reg_request); |
2433 | break; | |
b3eb7f3f | 2434 | case NL80211_REGDOM_SET_BY_DRIVER: |
772f0389 IP |
2435 | if (!wiphy) |
2436 | goto out_free; | |
21636c7f LR |
2437 | treatment = reg_process_hint_driver(wiphy, reg_request); |
2438 | break; | |
b3eb7f3f | 2439 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
772f0389 IP |
2440 | if (!wiphy) |
2441 | goto out_free; | |
b23e7a9e | 2442 | treatment = reg_process_hint_country_ie(wiphy, reg_request); |
b3eb7f3f LR |
2443 | break; |
2444 | default: | |
2445 | WARN(1, "invalid initiator %d\n", reg_request->initiator); | |
772f0389 | 2446 | goto out_free; |
b3eb7f3f LR |
2447 | } |
2448 | ||
d34265a3 JB |
2449 | if (treatment == REG_REQ_IGNORE) |
2450 | goto out_free; | |
2451 | ||
480908a7 JB |
2452 | WARN(treatment != REG_REQ_OK && treatment != REG_REQ_ALREADY_SET, |
2453 | "unexpected treatment value %d\n", treatment); | |
2454 | ||
841b351c JL |
2455 | /* This is required so that the orig_* parameters are saved. |
2456 | * NOTE: treatment must be set for any case that reaches here! | |
2457 | */ | |
b23e7a9e | 2458 | if (treatment == REG_REQ_ALREADY_SET && wiphy && |
ad932f04 | 2459 | wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
b23e7a9e | 2460 | wiphy_update_regulatory(wiphy, reg_request->initiator); |
89766727 | 2461 | wiphy_all_share_dfs_chan_state(wiphy); |
ad932f04 AN |
2462 | reg_check_channels(); |
2463 | } | |
772f0389 IP |
2464 | |
2465 | return; | |
2466 | ||
2467 | out_free: | |
c888393b | 2468 | reg_free_request(reg_request); |
fe33eb39 LR |
2469 | } |
2470 | ||
ef51fb1d AN |
2471 | static bool reg_only_self_managed_wiphys(void) |
2472 | { | |
2473 | struct cfg80211_registered_device *rdev; | |
2474 | struct wiphy *wiphy; | |
2475 | bool self_managed_found = false; | |
2476 | ||
2477 | ASSERT_RTNL(); | |
2478 | ||
2479 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
2480 | wiphy = &rdev->wiphy; | |
2481 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) | |
2482 | self_managed_found = true; | |
2483 | else | |
2484 | return false; | |
2485 | } | |
2486 | ||
2487 | /* make sure at least one self-managed wiphy exists */ | |
2488 | return self_managed_found; | |
2489 | } | |
2490 | ||
b2e253cf LR |
2491 | /* |
2492 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
2493 | * Regulatory hints come on a first come first serve basis and we | |
2494 | * must process each one atomically. | |
2495 | */ | |
fe33eb39 | 2496 | static void reg_process_pending_hints(void) |
b0e2880b | 2497 | { |
c492db37 | 2498 | struct regulatory_request *reg_request, *lr; |
fe33eb39 | 2499 | |
c492db37 | 2500 | lr = get_last_request(); |
b0e2880b | 2501 | |
b2e253cf | 2502 | /* When last_request->processed becomes true this will be rescheduled */ |
c492db37 | 2503 | if (lr && !lr->processed) { |
96cce12f | 2504 | reg_process_hint(lr); |
5fe231e8 | 2505 | return; |
b2e253cf LR |
2506 | } |
2507 | ||
fe33eb39 | 2508 | spin_lock(®_requests_lock); |
fe33eb39 | 2509 | |
b2e253cf | 2510 | if (list_empty(®_requests_list)) { |
d951c1dd | 2511 | spin_unlock(®_requests_lock); |
5fe231e8 | 2512 | return; |
fe33eb39 | 2513 | } |
b2e253cf LR |
2514 | |
2515 | reg_request = list_first_entry(®_requests_list, | |
2516 | struct regulatory_request, | |
2517 | list); | |
2518 | list_del_init(®_request->list); | |
2519 | ||
fe33eb39 | 2520 | spin_unlock(®_requests_lock); |
b0e2880b | 2521 | |
ef51fb1d AN |
2522 | if (reg_only_self_managed_wiphys()) { |
2523 | reg_free_request(reg_request); | |
2524 | return; | |
2525 | } | |
2526 | ||
1daa37c7 | 2527 | reg_process_hint(reg_request); |
2e54a689 B |
2528 | |
2529 | lr = get_last_request(); | |
2530 | ||
2531 | spin_lock(®_requests_lock); | |
2532 | if (!list_empty(®_requests_list) && lr && lr->processed) | |
2533 | schedule_work(®_work); | |
2534 | spin_unlock(®_requests_lock); | |
fe33eb39 LR |
2535 | } |
2536 | ||
e38f8a7a LR |
2537 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
2538 | static void reg_process_pending_beacon_hints(void) | |
2539 | { | |
79c97e97 | 2540 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
2541 | struct reg_beacon *pending_beacon, *tmp; |
2542 | ||
e38f8a7a LR |
2543 | /* This goes through the _pending_ beacon list */ |
2544 | spin_lock_bh(®_pending_beacons_lock); | |
2545 | ||
e38f8a7a LR |
2546 | list_for_each_entry_safe(pending_beacon, tmp, |
2547 | ®_pending_beacons, list) { | |
e38f8a7a LR |
2548 | list_del_init(&pending_beacon->list); |
2549 | ||
2550 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
2551 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
2552 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
2553 | |
2554 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
2555 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
2556 | } | |
2557 | ||
2558 | spin_unlock_bh(®_pending_beacons_lock); | |
e38f8a7a LR |
2559 | } |
2560 | ||
b0d7aa59 JD |
2561 | static void reg_process_self_managed_hints(void) |
2562 | { | |
2563 | struct cfg80211_registered_device *rdev; | |
2564 | struct wiphy *wiphy; | |
2565 | const struct ieee80211_regdomain *tmp; | |
2566 | const struct ieee80211_regdomain *regd; | |
57fbcce3 | 2567 | enum nl80211_band band; |
b0d7aa59 JD |
2568 | struct regulatory_request request = {}; |
2569 | ||
2570 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
2571 | wiphy = &rdev->wiphy; | |
2572 | ||
2573 | spin_lock(®_requests_lock); | |
2574 | regd = rdev->requested_regd; | |
2575 | rdev->requested_regd = NULL; | |
2576 | spin_unlock(®_requests_lock); | |
2577 | ||
2578 | if (regd == NULL) | |
2579 | continue; | |
2580 | ||
2581 | tmp = get_wiphy_regdom(wiphy); | |
2582 | rcu_assign_pointer(wiphy->regd, regd); | |
2583 | rcu_free_regdom(tmp); | |
2584 | ||
57fbcce3 | 2585 | for (band = 0; band < NUM_NL80211_BANDS; band++) |
b0d7aa59 JD |
2586 | handle_band_custom(wiphy, wiphy->bands[band], regd); |
2587 | ||
2588 | reg_process_ht_flags(wiphy); | |
2589 | ||
2590 | request.wiphy_idx = get_wiphy_idx(wiphy); | |
2591 | request.alpha2[0] = regd->alpha2[0]; | |
2592 | request.alpha2[1] = regd->alpha2[1]; | |
2593 | request.initiator = NL80211_REGDOM_SET_BY_DRIVER; | |
2594 | ||
2595 | nl80211_send_wiphy_reg_change_event(&request); | |
2596 | } | |
2597 | ||
2598 | reg_check_channels(); | |
2599 | } | |
2600 | ||
fe33eb39 LR |
2601 | static void reg_todo(struct work_struct *work) |
2602 | { | |
5fe231e8 | 2603 | rtnl_lock(); |
fe33eb39 | 2604 | reg_process_pending_hints(); |
e38f8a7a | 2605 | reg_process_pending_beacon_hints(); |
b0d7aa59 | 2606 | reg_process_self_managed_hints(); |
5fe231e8 | 2607 | rtnl_unlock(); |
fe33eb39 LR |
2608 | } |
2609 | ||
fe33eb39 LR |
2610 | static void queue_regulatory_request(struct regulatory_request *request) |
2611 | { | |
d4f2c881 JB |
2612 | request->alpha2[0] = toupper(request->alpha2[0]); |
2613 | request->alpha2[1] = toupper(request->alpha2[1]); | |
c61029c7 | 2614 | |
fe33eb39 LR |
2615 | spin_lock(®_requests_lock); |
2616 | list_add_tail(&request->list, ®_requests_list); | |
2617 | spin_unlock(®_requests_lock); | |
2618 | ||
2619 | schedule_work(®_work); | |
2620 | } | |
2621 | ||
09d989d1 LR |
2622 | /* |
2623 | * Core regulatory hint -- happens during cfg80211_init() | |
2624 | * and when we restore regulatory settings. | |
2625 | */ | |
ba25c141 LR |
2626 | static int regulatory_hint_core(const char *alpha2) |
2627 | { | |
2628 | struct regulatory_request *request; | |
2629 | ||
1a919318 | 2630 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
ba25c141 LR |
2631 | if (!request) |
2632 | return -ENOMEM; | |
2633 | ||
2634 | request->alpha2[0] = alpha2[0]; | |
2635 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2636 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 2637 | |
31e99729 | 2638 | queue_regulatory_request(request); |
5078b2e3 | 2639 | |
fe33eb39 | 2640 | return 0; |
ba25c141 LR |
2641 | } |
2642 | ||
fe33eb39 | 2643 | /* User hints */ |
57b5ce07 LR |
2644 | int regulatory_hint_user(const char *alpha2, |
2645 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 2646 | { |
fe33eb39 LR |
2647 | struct regulatory_request *request; |
2648 | ||
fdc9d7b2 JB |
2649 | if (WARN_ON(!alpha2)) |
2650 | return -EINVAL; | |
b2e1b302 | 2651 | |
fe33eb39 LR |
2652 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
2653 | if (!request) | |
2654 | return -ENOMEM; | |
2655 | ||
f4173766 | 2656 | request->wiphy_idx = WIPHY_IDX_INVALID; |
fe33eb39 LR |
2657 | request->alpha2[0] = alpha2[0]; |
2658 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 2659 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 2660 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 | 2661 | |
c37722bd | 2662 | /* Allow calling CRDA again */ |
b6863036 | 2663 | reset_crda_timeouts(); |
c37722bd | 2664 | |
fe33eb39 LR |
2665 | queue_regulatory_request(request); |
2666 | ||
2667 | return 0; | |
2668 | } | |
2669 | ||
05050753 | 2670 | int regulatory_hint_indoor(bool is_indoor, u32 portid) |
52616f2b | 2671 | { |
05050753 | 2672 | spin_lock(®_indoor_lock); |
52616f2b | 2673 | |
05050753 I |
2674 | /* It is possible that more than one user space process is trying to |
2675 | * configure the indoor setting. To handle such cases, clear the indoor | |
2676 | * setting in case that some process does not think that the device | |
2677 | * is operating in an indoor environment. In addition, if a user space | |
2678 | * process indicates that it is controlling the indoor setting, save its | |
2679 | * portid, i.e., make it the owner. | |
2680 | */ | |
2681 | reg_is_indoor = is_indoor; | |
2682 | if (reg_is_indoor) { | |
2683 | if (!reg_is_indoor_portid) | |
2684 | reg_is_indoor_portid = portid; | |
2685 | } else { | |
2686 | reg_is_indoor_portid = 0; | |
2687 | } | |
52616f2b | 2688 | |
05050753 | 2689 | spin_unlock(®_indoor_lock); |
52616f2b | 2690 | |
05050753 I |
2691 | if (!is_indoor) |
2692 | reg_check_channels(); | |
52616f2b IP |
2693 | |
2694 | return 0; | |
2695 | } | |
2696 | ||
05050753 I |
2697 | void regulatory_netlink_notify(u32 portid) |
2698 | { | |
2699 | spin_lock(®_indoor_lock); | |
2700 | ||
2701 | if (reg_is_indoor_portid != portid) { | |
2702 | spin_unlock(®_indoor_lock); | |
2703 | return; | |
2704 | } | |
2705 | ||
2706 | reg_is_indoor = false; | |
2707 | reg_is_indoor_portid = 0; | |
2708 | ||
2709 | spin_unlock(®_indoor_lock); | |
2710 | ||
2711 | reg_check_channels(); | |
2712 | } | |
2713 | ||
fe33eb39 LR |
2714 | /* Driver hints */ |
2715 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
2716 | { | |
2717 | struct regulatory_request *request; | |
2718 | ||
fdc9d7b2 JB |
2719 | if (WARN_ON(!alpha2 || !wiphy)) |
2720 | return -EINVAL; | |
fe33eb39 | 2721 | |
4f7b9140 LR |
2722 | wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG; |
2723 | ||
fe33eb39 LR |
2724 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
2725 | if (!request) | |
2726 | return -ENOMEM; | |
2727 | ||
2728 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
2729 | ||
fe33eb39 LR |
2730 | request->alpha2[0] = alpha2[0]; |
2731 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2732 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 | 2733 | |
c37722bd | 2734 | /* Allow calling CRDA again */ |
b6863036 | 2735 | reset_crda_timeouts(); |
c37722bd | 2736 | |
fe33eb39 LR |
2737 | queue_regulatory_request(request); |
2738 | ||
2739 | return 0; | |
b2e1b302 LR |
2740 | } |
2741 | EXPORT_SYMBOL(regulatory_hint); | |
2742 | ||
57fbcce3 | 2743 | void regulatory_hint_country_ie(struct wiphy *wiphy, enum nl80211_band band, |
789fd033 | 2744 | const u8 *country_ie, u8 country_ie_len) |
3f2355cb | 2745 | { |
3f2355cb | 2746 | char alpha2[2]; |
3f2355cb | 2747 | enum environment_cap env = ENVIRON_ANY; |
db2424c5 | 2748 | struct regulatory_request *request = NULL, *lr; |
d335fe63 | 2749 | |
3f2355cb LR |
2750 | /* IE len must be evenly divisible by 2 */ |
2751 | if (country_ie_len & 0x01) | |
db2424c5 | 2752 | return; |
3f2355cb LR |
2753 | |
2754 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
db2424c5 JB |
2755 | return; |
2756 | ||
2757 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
2758 | if (!request) | |
2759 | return; | |
3f2355cb | 2760 | |
3f2355cb LR |
2761 | alpha2[0] = country_ie[0]; |
2762 | alpha2[1] = country_ie[1]; | |
2763 | ||
2764 | if (country_ie[2] == 'I') | |
2765 | env = ENVIRON_INDOOR; | |
2766 | else if (country_ie[2] == 'O') | |
2767 | env = ENVIRON_OUTDOOR; | |
2768 | ||
db2424c5 JB |
2769 | rcu_read_lock(); |
2770 | lr = get_last_request(); | |
2771 | ||
2772 | if (unlikely(!lr)) | |
2773 | goto out; | |
2774 | ||
fb1fc7ad | 2775 | /* |
8b19e6ca | 2776 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc | 2777 | * We leave conflict resolution to the workqueue, where can hold |
5fe231e8 | 2778 | * the RTNL. |
fb1fc7ad | 2779 | */ |
c492db37 JB |
2780 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
2781 | lr->wiphy_idx != WIPHY_IDX_INVALID) | |
4b44c8bc | 2782 | goto out; |
3f2355cb | 2783 | |
fe33eb39 | 2784 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
2785 | request->alpha2[0] = alpha2[0]; |
2786 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2787 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
2788 | request->country_ie_env = env; |
2789 | ||
c37722bd | 2790 | /* Allow calling CRDA again */ |
b6863036 | 2791 | reset_crda_timeouts(); |
c37722bd | 2792 | |
fe33eb39 | 2793 | queue_regulatory_request(request); |
db2424c5 | 2794 | request = NULL; |
3f2355cb | 2795 | out: |
db2424c5 JB |
2796 | kfree(request); |
2797 | rcu_read_unlock(); | |
3f2355cb | 2798 | } |
b2e1b302 | 2799 | |
09d989d1 LR |
2800 | static void restore_alpha2(char *alpha2, bool reset_user) |
2801 | { | |
2802 | /* indicates there is no alpha2 to consider for restoration */ | |
2803 | alpha2[0] = '9'; | |
2804 | alpha2[1] = '7'; | |
2805 | ||
2806 | /* The user setting has precedence over the module parameter */ | |
2807 | if (is_user_regdom_saved()) { | |
2808 | /* Unless we're asked to ignore it and reset it */ | |
2809 | if (reset_user) { | |
c799ba6e | 2810 | pr_debug("Restoring regulatory settings including user preference\n"); |
09d989d1 LR |
2811 | user_alpha2[0] = '9'; |
2812 | user_alpha2[1] = '7'; | |
2813 | ||
2814 | /* | |
2815 | * If we're ignoring user settings, we still need to | |
2816 | * check the module parameter to ensure we put things | |
2817 | * back as they were for a full restore. | |
2818 | */ | |
2819 | if (!is_world_regdom(ieee80211_regdom)) { | |
c799ba6e JB |
2820 | pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
2821 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
2822 | alpha2[0] = ieee80211_regdom[0]; |
2823 | alpha2[1] = ieee80211_regdom[1]; | |
2824 | } | |
2825 | } else { | |
c799ba6e JB |
2826 | pr_debug("Restoring regulatory settings while preserving user preference for: %c%c\n", |
2827 | user_alpha2[0], user_alpha2[1]); | |
09d989d1 LR |
2828 | alpha2[0] = user_alpha2[0]; |
2829 | alpha2[1] = user_alpha2[1]; | |
2830 | } | |
2831 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
c799ba6e JB |
2832 | pr_debug("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
2833 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
2834 | alpha2[0] = ieee80211_regdom[0]; |
2835 | alpha2[1] = ieee80211_regdom[1]; | |
2836 | } else | |
c799ba6e | 2837 | pr_debug("Restoring regulatory settings\n"); |
09d989d1 LR |
2838 | } |
2839 | ||
5ce543d1 RM |
2840 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
2841 | { | |
2842 | struct ieee80211_supported_band *sband; | |
57fbcce3 | 2843 | enum nl80211_band band; |
5ce543d1 RM |
2844 | struct ieee80211_channel *chan; |
2845 | int i; | |
2846 | ||
57fbcce3 | 2847 | for (band = 0; band < NUM_NL80211_BANDS; band++) { |
5ce543d1 RM |
2848 | sband = wiphy->bands[band]; |
2849 | if (!sband) | |
2850 | continue; | |
2851 | for (i = 0; i < sband->n_channels; i++) { | |
2852 | chan = &sband->channels[i]; | |
2853 | chan->flags = chan->orig_flags; | |
2854 | chan->max_antenna_gain = chan->orig_mag; | |
2855 | chan->max_power = chan->orig_mpwr; | |
899852af | 2856 | chan->beacon_found = false; |
5ce543d1 RM |
2857 | } |
2858 | } | |
2859 | } | |
2860 | ||
09d989d1 LR |
2861 | /* |
2862 | * Restoring regulatory settings involves ingoring any | |
2863 | * possibly stale country IE information and user regulatory | |
2864 | * settings if so desired, this includes any beacon hints | |
2865 | * learned as we could have traveled outside to another country | |
2866 | * after disconnection. To restore regulatory settings we do | |
2867 | * exactly what we did at bootup: | |
2868 | * | |
2869 | * - send a core regulatory hint | |
2870 | * - send a user regulatory hint if applicable | |
2871 | * | |
2872 | * Device drivers that send a regulatory hint for a specific country | |
2873 | * keep their own regulatory domain on wiphy->regd so that does does | |
2874 | * not need to be remembered. | |
2875 | */ | |
2876 | static void restore_regulatory_settings(bool reset_user) | |
2877 | { | |
2878 | char alpha2[2]; | |
cee0bec5 | 2879 | char world_alpha2[2]; |
09d989d1 | 2880 | struct reg_beacon *reg_beacon, *btmp; |
14609555 | 2881 | LIST_HEAD(tmp_reg_req_list); |
5ce543d1 | 2882 | struct cfg80211_registered_device *rdev; |
09d989d1 | 2883 | |
5fe231e8 JB |
2884 | ASSERT_RTNL(); |
2885 | ||
05050753 I |
2886 | /* |
2887 | * Clear the indoor setting in case that it is not controlled by user | |
2888 | * space, as otherwise there is no guarantee that the device is still | |
2889 | * operating in an indoor environment. | |
2890 | */ | |
2891 | spin_lock(®_indoor_lock); | |
2892 | if (reg_is_indoor && !reg_is_indoor_portid) { | |
2893 | reg_is_indoor = false; | |
2894 | reg_check_channels(); | |
2895 | } | |
2896 | spin_unlock(®_indoor_lock); | |
52616f2b | 2897 | |
2d319867 | 2898 | reset_regdomains(true, &world_regdom); |
09d989d1 LR |
2899 | restore_alpha2(alpha2, reset_user); |
2900 | ||
14609555 LR |
2901 | /* |
2902 | * If there's any pending requests we simply | |
2903 | * stash them to a temporary pending queue and | |
2904 | * add then after we've restored regulatory | |
2905 | * settings. | |
2906 | */ | |
2907 | spin_lock(®_requests_lock); | |
eeca9fce | 2908 | list_splice_tail_init(®_requests_list, &tmp_reg_req_list); |
14609555 LR |
2909 | spin_unlock(®_requests_lock); |
2910 | ||
09d989d1 LR |
2911 | /* Clear beacon hints */ |
2912 | spin_lock_bh(®_pending_beacons_lock); | |
fea9bced JB |
2913 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2914 | list_del(®_beacon->list); | |
2915 | kfree(reg_beacon); | |
09d989d1 LR |
2916 | } |
2917 | spin_unlock_bh(®_pending_beacons_lock); | |
2918 | ||
fea9bced JB |
2919 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2920 | list_del(®_beacon->list); | |
2921 | kfree(reg_beacon); | |
09d989d1 LR |
2922 | } |
2923 | ||
2924 | /* First restore to the basic regulatory settings */ | |
379b82f4 JB |
2925 | world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; |
2926 | world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; | |
09d989d1 | 2927 | |
5ce543d1 | 2928 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
b0d7aa59 JD |
2929 | if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) |
2930 | continue; | |
a2f73b6c | 2931 | if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG) |
5ce543d1 RM |
2932 | restore_custom_reg_settings(&rdev->wiphy); |
2933 | } | |
2934 | ||
cee0bec5 | 2935 | regulatory_hint_core(world_alpha2); |
09d989d1 LR |
2936 | |
2937 | /* | |
2938 | * This restores the ieee80211_regdom module parameter | |
2939 | * preference or the last user requested regulatory | |
2940 | * settings, user regulatory settings takes precedence. | |
2941 | */ | |
2942 | if (is_an_alpha2(alpha2)) | |
549cc1c5 | 2943 | regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER); |
09d989d1 | 2944 | |
14609555 | 2945 | spin_lock(®_requests_lock); |
11cff96c | 2946 | list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); |
14609555 LR |
2947 | spin_unlock(®_requests_lock); |
2948 | ||
c799ba6e | 2949 | pr_debug("Kicking the queue\n"); |
14609555 LR |
2950 | |
2951 | schedule_work(®_work); | |
2952 | } | |
09d989d1 LR |
2953 | |
2954 | void regulatory_hint_disconnect(void) | |
2955 | { | |
c799ba6e | 2956 | pr_debug("All devices are disconnected, going to restore regulatory settings\n"); |
09d989d1 LR |
2957 | restore_regulatory_settings(false); |
2958 | } | |
2959 | ||
e38f8a7a LR |
2960 | static bool freq_is_chan_12_13_14(u16 freq) |
2961 | { | |
57fbcce3 JB |
2962 | if (freq == ieee80211_channel_to_frequency(12, NL80211_BAND_2GHZ) || |
2963 | freq == ieee80211_channel_to_frequency(13, NL80211_BAND_2GHZ) || | |
2964 | freq == ieee80211_channel_to_frequency(14, NL80211_BAND_2GHZ)) | |
e38f8a7a LR |
2965 | return true; |
2966 | return false; | |
2967 | } | |
2968 | ||
3ebfa6e7 LR |
2969 | static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) |
2970 | { | |
2971 | struct reg_beacon *pending_beacon; | |
2972 | ||
2973 | list_for_each_entry(pending_beacon, ®_pending_beacons, list) | |
2974 | if (beacon_chan->center_freq == | |
2975 | pending_beacon->chan.center_freq) | |
2976 | return true; | |
2977 | return false; | |
2978 | } | |
2979 | ||
e38f8a7a LR |
2980 | int regulatory_hint_found_beacon(struct wiphy *wiphy, |
2981 | struct ieee80211_channel *beacon_chan, | |
2982 | gfp_t gfp) | |
2983 | { | |
2984 | struct reg_beacon *reg_beacon; | |
3ebfa6e7 | 2985 | bool processing; |
e38f8a7a | 2986 | |
1a919318 JB |
2987 | if (beacon_chan->beacon_found || |
2988 | beacon_chan->flags & IEEE80211_CHAN_RADAR || | |
57fbcce3 | 2989 | (beacon_chan->band == NL80211_BAND_2GHZ && |
1a919318 | 2990 | !freq_is_chan_12_13_14(beacon_chan->center_freq))) |
e38f8a7a LR |
2991 | return 0; |
2992 | ||
3ebfa6e7 LR |
2993 | spin_lock_bh(®_pending_beacons_lock); |
2994 | processing = pending_reg_beacon(beacon_chan); | |
2995 | spin_unlock_bh(®_pending_beacons_lock); | |
2996 | ||
2997 | if (processing) | |
e38f8a7a LR |
2998 | return 0; |
2999 | ||
3000 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
3001 | if (!reg_beacon) | |
3002 | return -ENOMEM; | |
3003 | ||
c799ba6e JB |
3004 | pr_debug("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", |
3005 | beacon_chan->center_freq, | |
3006 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
3007 | wiphy_name(wiphy)); | |
4113f751 | 3008 | |
e38f8a7a | 3009 | memcpy(®_beacon->chan, beacon_chan, |
1a919318 | 3010 | sizeof(struct ieee80211_channel)); |
e38f8a7a LR |
3011 | |
3012 | /* | |
3013 | * Since we can be called from BH or and non-BH context | |
3014 | * we must use spin_lock_bh() | |
3015 | */ | |
3016 | spin_lock_bh(®_pending_beacons_lock); | |
3017 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
3018 | spin_unlock_bh(®_pending_beacons_lock); | |
3019 | ||
3020 | schedule_work(®_work); | |
3021 | ||
3022 | return 0; | |
3023 | } | |
3024 | ||
a3d2eaf0 | 3025 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
3026 | { |
3027 | unsigned int i; | |
a3d2eaf0 JB |
3028 | const struct ieee80211_reg_rule *reg_rule = NULL; |
3029 | const struct ieee80211_freq_range *freq_range = NULL; | |
3030 | const struct ieee80211_power_rule *power_rule = NULL; | |
089027e5 | 3031 | char bw[32], cac_time[32]; |
b2e1b302 | 3032 | |
94c4fd64 | 3033 | pr_debug(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n"); |
b2e1b302 LR |
3034 | |
3035 | for (i = 0; i < rd->n_reg_rules; i++) { | |
3036 | reg_rule = &rd->reg_rules[i]; | |
3037 | freq_range = ®_rule->freq_range; | |
3038 | power_rule = ®_rule->power_rule; | |
3039 | ||
b0dfd2ea JD |
3040 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
3041 | snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", | |
3042 | freq_range->max_bandwidth_khz, | |
97524820 JD |
3043 | reg_get_max_bandwidth(rd, reg_rule)); |
3044 | else | |
b0dfd2ea | 3045 | snprintf(bw, sizeof(bw), "%d KHz", |
97524820 JD |
3046 | freq_range->max_bandwidth_khz); |
3047 | ||
089027e5 JD |
3048 | if (reg_rule->flags & NL80211_RRF_DFS) |
3049 | scnprintf(cac_time, sizeof(cac_time), "%u s", | |
3050 | reg_rule->dfs_cac_ms/1000); | |
3051 | else | |
3052 | scnprintf(cac_time, sizeof(cac_time), "N/A"); | |
3053 | ||
3054 | ||
fb1fc7ad LR |
3055 | /* |
3056 | * There may not be documentation for max antenna gain | |
3057 | * in certain regions | |
3058 | */ | |
b2e1b302 | 3059 | if (power_rule->max_antenna_gain) |
94c4fd64 | 3060 | pr_debug(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n", |
b2e1b302 LR |
3061 | freq_range->start_freq_khz, |
3062 | freq_range->end_freq_khz, | |
97524820 | 3063 | bw, |
b2e1b302 | 3064 | power_rule->max_antenna_gain, |
089027e5 JD |
3065 | power_rule->max_eirp, |
3066 | cac_time); | |
b2e1b302 | 3067 | else |
94c4fd64 | 3068 | pr_debug(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n", |
b2e1b302 LR |
3069 | freq_range->start_freq_khz, |
3070 | freq_range->end_freq_khz, | |
97524820 | 3071 | bw, |
089027e5 JD |
3072 | power_rule->max_eirp, |
3073 | cac_time); | |
b2e1b302 LR |
3074 | } |
3075 | } | |
3076 | ||
4c7d3982 | 3077 | bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region) |
8b60b078 LR |
3078 | { |
3079 | switch (dfs_region) { | |
3080 | case NL80211_DFS_UNSET: | |
3081 | case NL80211_DFS_FCC: | |
3082 | case NL80211_DFS_ETSI: | |
3083 | case NL80211_DFS_JP: | |
3084 | return true; | |
3085 | default: | |
c799ba6e | 3086 | pr_debug("Ignoring uknown DFS master region: %d\n", dfs_region); |
8b60b078 LR |
3087 | return false; |
3088 | } | |
3089 | } | |
3090 | ||
a3d2eaf0 | 3091 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 | 3092 | { |
c492db37 | 3093 | struct regulatory_request *lr = get_last_request(); |
b2e1b302 | 3094 | |
3f2355cb | 3095 | if (is_intersected_alpha2(rd->alpha2)) { |
c492db37 | 3096 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
79c97e97 | 3097 | struct cfg80211_registered_device *rdev; |
c492db37 | 3098 | rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); |
79c97e97 | 3099 | if (rdev) { |
94c4fd64 | 3100 | pr_debug("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
3101 | rdev->country_ie_alpha2[0], |
3102 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 3103 | } else |
94c4fd64 | 3104 | pr_debug("Current regulatory domain intersected:\n"); |
3f2355cb | 3105 | } else |
94c4fd64 | 3106 | pr_debug("Current regulatory domain intersected:\n"); |
1a919318 | 3107 | } else if (is_world_regdom(rd->alpha2)) { |
94c4fd64 | 3108 | pr_debug("World regulatory domain updated:\n"); |
1a919318 | 3109 | } else { |
b2e1b302 | 3110 | if (is_unknown_alpha2(rd->alpha2)) |
94c4fd64 | 3111 | pr_debug("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 | 3112 | else { |
c492db37 | 3113 | if (reg_request_cell_base(lr)) |
94c4fd64 | 3114 | pr_debug("Regulatory domain changed to country: %c%c by Cell Station\n", |
57b5ce07 LR |
3115 | rd->alpha2[0], rd->alpha2[1]); |
3116 | else | |
94c4fd64 | 3117 | pr_debug("Regulatory domain changed to country: %c%c\n", |
57b5ce07 LR |
3118 | rd->alpha2[0], rd->alpha2[1]); |
3119 | } | |
b2e1b302 | 3120 | } |
1a919318 | 3121 | |
94c4fd64 | 3122 | pr_debug(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region)); |
b2e1b302 LR |
3123 | print_rd_rules(rd); |
3124 | } | |
3125 | ||
2df78167 | 3126 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 3127 | { |
94c4fd64 | 3128 | pr_debug("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
3129 | print_rd_rules(rd); |
3130 | } | |
3131 | ||
3b9e5aca LR |
3132 | static int reg_set_rd_core(const struct ieee80211_regdomain *rd) |
3133 | { | |
3134 | if (!is_world_regdom(rd->alpha2)) | |
3135 | return -EINVAL; | |
3136 | update_world_regdomain(rd); | |
3137 | return 0; | |
3138 | } | |
3139 | ||
84721d44 LR |
3140 | static int reg_set_rd_user(const struct ieee80211_regdomain *rd, |
3141 | struct regulatory_request *user_request) | |
3142 | { | |
3143 | const struct ieee80211_regdomain *intersected_rd = NULL; | |
3144 | ||
84721d44 LR |
3145 | if (!regdom_changes(rd->alpha2)) |
3146 | return -EALREADY; | |
3147 | ||
3148 | if (!is_valid_rd(rd)) { | |
94c4fd64 DY |
3149 | pr_err("Invalid regulatory domain detected: %c%c\n", |
3150 | rd->alpha2[0], rd->alpha2[1]); | |
84721d44 LR |
3151 | print_regdomain_info(rd); |
3152 | return -EINVAL; | |
3153 | } | |
3154 | ||
3155 | if (!user_request->intersect) { | |
3156 | reset_regdomains(false, rd); | |
3157 | return 0; | |
3158 | } | |
3159 | ||
3160 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); | |
3161 | if (!intersected_rd) | |
3162 | return -EINVAL; | |
3163 | ||
3164 | kfree(rd); | |
3165 | rd = NULL; | |
3166 | reset_regdomains(false, intersected_rd); | |
3167 | ||
3168 | return 0; | |
3169 | } | |
3170 | ||
f5fe3247 LR |
3171 | static int reg_set_rd_driver(const struct ieee80211_regdomain *rd, |
3172 | struct regulatory_request *driver_request) | |
b2e1b302 | 3173 | { |
e9763c3c | 3174 | const struct ieee80211_regdomain *regd; |
9c96477d | 3175 | const struct ieee80211_regdomain *intersected_rd = NULL; |
f5fe3247 | 3176 | const struct ieee80211_regdomain *tmp; |
806a9e39 | 3177 | struct wiphy *request_wiphy; |
6913b49a | 3178 | |
f5fe3247 | 3179 | if (is_world_regdom(rd->alpha2)) |
b2e1b302 LR |
3180 | return -EINVAL; |
3181 | ||
f5fe3247 LR |
3182 | if (!regdom_changes(rd->alpha2)) |
3183 | return -EALREADY; | |
b2e1b302 | 3184 | |
8375af3b | 3185 | if (!is_valid_rd(rd)) { |
94c4fd64 DY |
3186 | pr_err("Invalid regulatory domain detected: %c%c\n", |
3187 | rd->alpha2[0], rd->alpha2[1]); | |
8375af3b LR |
3188 | print_regdomain_info(rd); |
3189 | return -EINVAL; | |
b2e1b302 LR |
3190 | } |
3191 | ||
f5fe3247 | 3192 | request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx); |
922ec58c | 3193 | if (!request_wiphy) |
de3584bd | 3194 | return -ENODEV; |
806a9e39 | 3195 | |
f5fe3247 | 3196 | if (!driver_request->intersect) { |
558f6d32 LR |
3197 | if (request_wiphy->regd) |
3198 | return -EALREADY; | |
3e0c3ff3 | 3199 | |
e9763c3c JB |
3200 | regd = reg_copy_regd(rd); |
3201 | if (IS_ERR(regd)) | |
3202 | return PTR_ERR(regd); | |
3e0c3ff3 | 3203 | |
458f4f9e | 3204 | rcu_assign_pointer(request_wiphy->regd, regd); |
379b82f4 | 3205 | reset_regdomains(false, rd); |
b8295acd LR |
3206 | return 0; |
3207 | } | |
3208 | ||
f5fe3247 LR |
3209 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); |
3210 | if (!intersected_rd) | |
3211 | return -EINVAL; | |
b8295acd | 3212 | |
f5fe3247 LR |
3213 | /* |
3214 | * We can trash what CRDA provided now. | |
3215 | * However if a driver requested this specific regulatory | |
3216 | * domain we keep it for its private use | |
3217 | */ | |
3218 | tmp = get_wiphy_regdom(request_wiphy); | |
3219 | rcu_assign_pointer(request_wiphy->regd, rd); | |
3220 | rcu_free_regdom(tmp); | |
b8295acd | 3221 | |
f5fe3247 | 3222 | rd = NULL; |
b7566fc3 | 3223 | |
f5fe3247 | 3224 | reset_regdomains(false, intersected_rd); |
3e0c3ff3 | 3225 | |
f5fe3247 LR |
3226 | return 0; |
3227 | } | |
3228 | ||
01992406 LR |
3229 | static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd, |
3230 | struct regulatory_request *country_ie_request) | |
f5fe3247 LR |
3231 | { |
3232 | struct wiphy *request_wiphy; | |
b8295acd | 3233 | |
f5fe3247 LR |
3234 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && |
3235 | !is_unknown_alpha2(rd->alpha2)) | |
3236 | return -EINVAL; | |
b8295acd | 3237 | |
f5fe3247 LR |
3238 | /* |
3239 | * Lets only bother proceeding on the same alpha2 if the current | |
3240 | * rd is non static (it means CRDA was present and was used last) | |
3241 | * and the pending request came in from a country IE | |
3242 | */ | |
3243 | ||
3244 | if (!is_valid_rd(rd)) { | |
94c4fd64 DY |
3245 | pr_err("Invalid regulatory domain detected: %c%c\n", |
3246 | rd->alpha2[0], rd->alpha2[1]); | |
f5fe3247 LR |
3247 | print_regdomain_info(rd); |
3248 | return -EINVAL; | |
9c96477d LR |
3249 | } |
3250 | ||
01992406 | 3251 | request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx); |
922ec58c | 3252 | if (!request_wiphy) |
f5fe3247 | 3253 | return -ENODEV; |
b2e1b302 | 3254 | |
01992406 | 3255 | if (country_ie_request->intersect) |
f5fe3247 LR |
3256 | return -EINVAL; |
3257 | ||
3258 | reset_regdomains(false, rd); | |
3259 | return 0; | |
3260 | } | |
b2e1b302 | 3261 | |
fb1fc7ad LR |
3262 | /* |
3263 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 3264 | * multiple drivers can be ironed out later. Caller must've already |
458f4f9e | 3265 | * kmalloc'd the rd structure. |
fb1fc7ad | 3266 | */ |
c37722bd I |
3267 | int set_regdom(const struct ieee80211_regdomain *rd, |
3268 | enum ieee80211_regd_source regd_src) | |
b2e1b302 | 3269 | { |
c492db37 | 3270 | struct regulatory_request *lr; |
092008ab | 3271 | bool user_reset = false; |
b2e1b302 LR |
3272 | int r; |
3273 | ||
3b9e5aca LR |
3274 | if (!reg_is_valid_request(rd->alpha2)) { |
3275 | kfree(rd); | |
3276 | return -EINVAL; | |
3277 | } | |
3278 | ||
c37722bd | 3279 | if (regd_src == REGD_SOURCE_CRDA) |
b6863036 | 3280 | reset_crda_timeouts(); |
c37722bd | 3281 | |
c492db37 | 3282 | lr = get_last_request(); |
abc7381b | 3283 | |
b2e1b302 | 3284 | /* Note that this doesn't update the wiphys, this is done below */ |
3b9e5aca LR |
3285 | switch (lr->initiator) { |
3286 | case NL80211_REGDOM_SET_BY_CORE: | |
3287 | r = reg_set_rd_core(rd); | |
3288 | break; | |
3289 | case NL80211_REGDOM_SET_BY_USER: | |
84721d44 | 3290 | r = reg_set_rd_user(rd, lr); |
092008ab | 3291 | user_reset = true; |
84721d44 | 3292 | break; |
3b9e5aca | 3293 | case NL80211_REGDOM_SET_BY_DRIVER: |
f5fe3247 LR |
3294 | r = reg_set_rd_driver(rd, lr); |
3295 | break; | |
3b9e5aca | 3296 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
01992406 | 3297 | r = reg_set_rd_country_ie(rd, lr); |
3b9e5aca LR |
3298 | break; |
3299 | default: | |
3300 | WARN(1, "invalid initiator %d\n", lr->initiator); | |
09d11800 | 3301 | kfree(rd); |
3b9e5aca LR |
3302 | return -EINVAL; |
3303 | } | |
3304 | ||
d2372b31 | 3305 | if (r) { |
092008ab JD |
3306 | switch (r) { |
3307 | case -EALREADY: | |
95908535 | 3308 | reg_set_request_processed(); |
092008ab JD |
3309 | break; |
3310 | default: | |
3311 | /* Back to world regulatory in case of errors */ | |
3312 | restore_regulatory_settings(user_reset); | |
3313 | } | |
95908535 | 3314 | |
d2372b31 | 3315 | kfree(rd); |
38fd2143 | 3316 | return r; |
d2372b31 | 3317 | } |
b2e1b302 | 3318 | |
b2e1b302 | 3319 | /* This would make this whole thing pointless */ |
38fd2143 JB |
3320 | if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) |
3321 | return -EINVAL; | |
b2e1b302 LR |
3322 | |
3323 | /* update all wiphys now with the new established regulatory domain */ | |
c492db37 | 3324 | update_all_wiphy_regulatory(lr->initiator); |
b2e1b302 | 3325 | |
458f4f9e | 3326 | print_regdomain(get_cfg80211_regdom()); |
b2e1b302 | 3327 | |
c492db37 | 3328 | nl80211_send_reg_change_event(lr); |
73d54c9e | 3329 | |
b2e253cf LR |
3330 | reg_set_request_processed(); |
3331 | ||
38fd2143 | 3332 | return 0; |
b2e1b302 LR |
3333 | } |
3334 | ||
2c3e861c AN |
3335 | static int __regulatory_set_wiphy_regd(struct wiphy *wiphy, |
3336 | struct ieee80211_regdomain *rd) | |
b0d7aa59 JD |
3337 | { |
3338 | const struct ieee80211_regdomain *regd; | |
3339 | const struct ieee80211_regdomain *prev_regd; | |
3340 | struct cfg80211_registered_device *rdev; | |
3341 | ||
3342 | if (WARN_ON(!wiphy || !rd)) | |
3343 | return -EINVAL; | |
3344 | ||
3345 | if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED), | |
3346 | "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n")) | |
3347 | return -EPERM; | |
3348 | ||
3349 | if (WARN(!is_valid_rd(rd), "Invalid regulatory domain detected\n")) { | |
3350 | print_regdomain_info(rd); | |
3351 | return -EINVAL; | |
3352 | } | |
3353 | ||
3354 | regd = reg_copy_regd(rd); | |
3355 | if (IS_ERR(regd)) | |
3356 | return PTR_ERR(regd); | |
3357 | ||
3358 | rdev = wiphy_to_rdev(wiphy); | |
3359 | ||
3360 | spin_lock(®_requests_lock); | |
3361 | prev_regd = rdev->requested_regd; | |
3362 | rdev->requested_regd = regd; | |
3363 | spin_unlock(®_requests_lock); | |
3364 | ||
3365 | kfree(prev_regd); | |
2c3e861c AN |
3366 | return 0; |
3367 | } | |
3368 | ||
3369 | int regulatory_set_wiphy_regd(struct wiphy *wiphy, | |
3370 | struct ieee80211_regdomain *rd) | |
3371 | { | |
3372 | int ret = __regulatory_set_wiphy_regd(wiphy, rd); | |
3373 | ||
3374 | if (ret) | |
3375 | return ret; | |
b0d7aa59 JD |
3376 | |
3377 | schedule_work(®_work); | |
3378 | return 0; | |
3379 | } | |
3380 | EXPORT_SYMBOL(regulatory_set_wiphy_regd); | |
3381 | ||
2c3e861c AN |
3382 | int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy *wiphy, |
3383 | struct ieee80211_regdomain *rd) | |
3384 | { | |
3385 | int ret; | |
3386 | ||
3387 | ASSERT_RTNL(); | |
3388 | ||
3389 | ret = __regulatory_set_wiphy_regd(wiphy, rd); | |
3390 | if (ret) | |
3391 | return ret; | |
3392 | ||
3393 | /* process the request immediately */ | |
3394 | reg_process_self_managed_hints(); | |
3395 | return 0; | |
3396 | } | |
3397 | EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl); | |
3398 | ||
57b5ce07 LR |
3399 | void wiphy_regulatory_register(struct wiphy *wiphy) |
3400 | { | |
23df0b73 AN |
3401 | struct regulatory_request *lr; |
3402 | ||
b0d7aa59 JD |
3403 | /* self-managed devices ignore external hints */ |
3404 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) | |
3405 | wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS | | |
3406 | REGULATORY_COUNTRY_IE_IGNORE; | |
3407 | ||
57b5ce07 LR |
3408 | if (!reg_dev_ignore_cell_hint(wiphy)) |
3409 | reg_num_devs_support_basehint++; | |
3410 | ||
23df0b73 AN |
3411 | lr = get_last_request(); |
3412 | wiphy_update_regulatory(wiphy, lr->initiator); | |
89766727 | 3413 | wiphy_all_share_dfs_chan_state(wiphy); |
57b5ce07 LR |
3414 | } |
3415 | ||
bfead080 | 3416 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 3417 | { |
0ad8acaf | 3418 | struct wiphy *request_wiphy = NULL; |
c492db37 | 3419 | struct regulatory_request *lr; |
761cf7ec | 3420 | |
c492db37 | 3421 | lr = get_last_request(); |
abc7381b | 3422 | |
57b5ce07 LR |
3423 | if (!reg_dev_ignore_cell_hint(wiphy)) |
3424 | reg_num_devs_support_basehint--; | |
3425 | ||
458f4f9e | 3426 | rcu_free_regdom(get_wiphy_regdom(wiphy)); |
34dd886c | 3427 | RCU_INIT_POINTER(wiphy->regd, NULL); |
0ef9ccdd | 3428 | |
c492db37 JB |
3429 | if (lr) |
3430 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
806a9e39 | 3431 | |
0ef9ccdd | 3432 | if (!request_wiphy || request_wiphy != wiphy) |
38fd2143 | 3433 | return; |
0ef9ccdd | 3434 | |
c492db37 JB |
3435 | lr->wiphy_idx = WIPHY_IDX_INVALID; |
3436 | lr->country_ie_env = ENVIRON_ANY; | |
3f2355cb LR |
3437 | } |
3438 | ||
174e0cd2 IP |
3439 | /* |
3440 | * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for | |
3441 | * UNII band definitions | |
3442 | */ | |
3443 | int cfg80211_get_unii(int freq) | |
3444 | { | |
3445 | /* UNII-1 */ | |
3446 | if (freq >= 5150 && freq <= 5250) | |
3447 | return 0; | |
3448 | ||
3449 | /* UNII-2A */ | |
3450 | if (freq > 5250 && freq <= 5350) | |
3451 | return 1; | |
3452 | ||
3453 | /* UNII-2B */ | |
3454 | if (freq > 5350 && freq <= 5470) | |
3455 | return 2; | |
3456 | ||
3457 | /* UNII-2C */ | |
3458 | if (freq > 5470 && freq <= 5725) | |
3459 | return 3; | |
3460 | ||
3461 | /* UNII-3 */ | |
3462 | if (freq > 5725 && freq <= 5825) | |
3463 | return 4; | |
3464 | ||
3465 | return -EINVAL; | |
3466 | } | |
3467 | ||
c8866e55 IP |
3468 | bool regulatory_indoor_allowed(void) |
3469 | { | |
3470 | return reg_is_indoor; | |
3471 | } | |
3472 | ||
b35a51c7 VT |
3473 | bool regulatory_pre_cac_allowed(struct wiphy *wiphy) |
3474 | { | |
3475 | const struct ieee80211_regdomain *regd = NULL; | |
3476 | const struct ieee80211_regdomain *wiphy_regd = NULL; | |
3477 | bool pre_cac_allowed = false; | |
3478 | ||
3479 | rcu_read_lock(); | |
3480 | ||
3481 | regd = rcu_dereference(cfg80211_regdomain); | |
3482 | wiphy_regd = rcu_dereference(wiphy->regd); | |
3483 | if (!wiphy_regd) { | |
3484 | if (regd->dfs_region == NL80211_DFS_ETSI) | |
3485 | pre_cac_allowed = true; | |
3486 | ||
3487 | rcu_read_unlock(); | |
3488 | ||
3489 | return pre_cac_allowed; | |
3490 | } | |
3491 | ||
3492 | if (regd->dfs_region == wiphy_regd->dfs_region && | |
3493 | wiphy_regd->dfs_region == NL80211_DFS_ETSI) | |
3494 | pre_cac_allowed = true; | |
3495 | ||
3496 | rcu_read_unlock(); | |
3497 | ||
3498 | return pre_cac_allowed; | |
3499 | } | |
3500 | ||
89766727 VT |
3501 | void regulatory_propagate_dfs_state(struct wiphy *wiphy, |
3502 | struct cfg80211_chan_def *chandef, | |
3503 | enum nl80211_dfs_state dfs_state, | |
3504 | enum nl80211_radar_event event) | |
3505 | { | |
3506 | struct cfg80211_registered_device *rdev; | |
3507 | ||
3508 | ASSERT_RTNL(); | |
3509 | ||
3510 | if (WARN_ON(!cfg80211_chandef_valid(chandef))) | |
3511 | return; | |
3512 | ||
89766727 VT |
3513 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
3514 | if (wiphy == &rdev->wiphy) | |
3515 | continue; | |
3516 | ||
3517 | if (!reg_dfs_domain_same(wiphy, &rdev->wiphy)) | |
3518 | continue; | |
3519 | ||
3520 | if (!ieee80211_get_channel(&rdev->wiphy, | |
3521 | chandef->chan->center_freq)) | |
3522 | continue; | |
3523 | ||
3524 | cfg80211_set_dfs_state(&rdev->wiphy, chandef, dfs_state); | |
3525 | ||
3526 | if (event == NL80211_RADAR_DETECTED || | |
3527 | event == NL80211_RADAR_CAC_FINISHED) | |
3528 | cfg80211_sched_dfs_chan_update(rdev); | |
3529 | ||
3530 | nl80211_radar_notify(rdev, chandef, event, NULL, GFP_KERNEL); | |
3531 | } | |
3532 | } | |
3533 | ||
2fcc9f73 | 3534 | int __init regulatory_init(void) |
b2e1b302 | 3535 | { |
bcf4f99b | 3536 | int err = 0; |
734366de | 3537 | |
b2e1b302 LR |
3538 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
3539 | if (IS_ERR(reg_pdev)) | |
3540 | return PTR_ERR(reg_pdev); | |
734366de | 3541 | |
fe33eb39 | 3542 | spin_lock_init(®_requests_lock); |
e38f8a7a | 3543 | spin_lock_init(®_pending_beacons_lock); |
05050753 | 3544 | spin_lock_init(®_indoor_lock); |
fe33eb39 | 3545 | |
458f4f9e | 3546 | rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); |
734366de | 3547 | |
09d989d1 LR |
3548 | user_alpha2[0] = '9'; |
3549 | user_alpha2[1] = '7'; | |
3550 | ||
ae9e4b0d | 3551 | /* We always try to get an update for the static regdomain */ |
458f4f9e | 3552 | err = regulatory_hint_core(cfg80211_world_regdom->alpha2); |
ba25c141 | 3553 | if (err) { |
09d11800 OO |
3554 | if (err == -ENOMEM) { |
3555 | platform_device_unregister(reg_pdev); | |
bcf4f99b | 3556 | return err; |
09d11800 | 3557 | } |
bcf4f99b LR |
3558 | /* |
3559 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
3560 | * memory which is handled and propagated appropriately above | |
3561 | * but it can also fail during a netlink_broadcast() or during | |
3562 | * early boot for call_usermodehelper(). For now treat these | |
3563 | * errors as non-fatal. | |
3564 | */ | |
e9c0268f | 3565 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b | 3566 | } |
734366de | 3567 | |
ae9e4b0d LR |
3568 | /* |
3569 | * Finally, if the user set the module parameter treat it | |
3570 | * as a user hint. | |
3571 | */ | |
3572 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
3573 | regulatory_hint_user(ieee80211_regdom, |
3574 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 3575 | |
b2e1b302 LR |
3576 | return 0; |
3577 | } | |
3578 | ||
1a919318 | 3579 | void regulatory_exit(void) |
b2e1b302 | 3580 | { |
fe33eb39 | 3581 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 3582 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
3583 | |
3584 | cancel_work_sync(®_work); | |
b6863036 | 3585 | cancel_crda_timeout_sync(); |
ad932f04 | 3586 | cancel_delayed_work_sync(®_check_chans); |
fe33eb39 | 3587 | |
9027b149 | 3588 | /* Lock to suppress warnings */ |
38fd2143 | 3589 | rtnl_lock(); |
379b82f4 | 3590 | reset_regdomains(true, NULL); |
38fd2143 | 3591 | rtnl_unlock(); |
734366de | 3592 | |
58ebacc6 | 3593 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 3594 | |
b2e1b302 | 3595 | platform_device_unregister(reg_pdev); |
734366de | 3596 | |
fea9bced JB |
3597 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
3598 | list_del(®_beacon->list); | |
3599 | kfree(reg_beacon); | |
e38f8a7a | 3600 | } |
e38f8a7a | 3601 | |
fea9bced JB |
3602 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
3603 | list_del(®_beacon->list); | |
3604 | kfree(reg_beacon); | |
e38f8a7a LR |
3605 | } |
3606 | ||
fea9bced JB |
3607 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
3608 | list_del(®_request->list); | |
3609 | kfree(reg_request); | |
fe33eb39 | 3610 | } |
007f6c5e JB |
3611 | |
3612 | if (!IS_ERR_OR_NULL(regdb)) | |
3613 | kfree(regdb); | |
8318d78a | 3614 | } |