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Commit | Line | Data |
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8318d78a JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
3b77d5ec | 5 | * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com> |
2740f0cf | 6 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
8318d78a | 7 | * |
3b77d5ec LR |
8 | * Permission to use, copy, modify, and/or distribute this software for any |
9 | * purpose with or without fee is hereby granted, provided that the above | |
10 | * copyright notice and this permission notice appear in all copies. | |
11 | * | |
12 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
13 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
14 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
15 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
16 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
17 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
18 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
8318d78a JB |
19 | */ |
20 | ||
3b77d5ec | 21 | |
b2e1b302 LR |
22 | /** |
23 | * DOC: Wireless regulatory infrastructure | |
8318d78a JB |
24 | * |
25 | * The usual implementation is for a driver to read a device EEPROM to | |
26 | * determine which regulatory domain it should be operating under, then | |
27 | * looking up the allowable channels in a driver-local table and finally | |
28 | * registering those channels in the wiphy structure. | |
29 | * | |
b2e1b302 LR |
30 | * Another set of compliance enforcement is for drivers to use their |
31 | * own compliance limits which can be stored on the EEPROM. The host | |
32 | * driver or firmware may ensure these are used. | |
33 | * | |
34 | * In addition to all this we provide an extra layer of regulatory | |
35 | * conformance. For drivers which do not have any regulatory | |
36 | * information CRDA provides the complete regulatory solution. | |
37 | * For others it provides a community effort on further restrictions | |
38 | * to enhance compliance. | |
39 | * | |
40 | * Note: When number of rules --> infinity we will not be able to | |
41 | * index on alpha2 any more, instead we'll probably have to | |
42 | * rely on some SHA1 checksum of the regdomain for example. | |
43 | * | |
8318d78a | 44 | */ |
e9c0268f JP |
45 | |
46 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
47 | ||
8318d78a | 48 | #include <linux/kernel.h> |
bc3b2d7f | 49 | #include <linux/export.h> |
5a0e3ad6 | 50 | #include <linux/slab.h> |
b2e1b302 | 51 | #include <linux/list.h> |
c61029c7 | 52 | #include <linux/ctype.h> |
b2e1b302 LR |
53 | #include <linux/nl80211.h> |
54 | #include <linux/platform_device.h> | |
d9b93842 | 55 | #include <linux/moduleparam.h> |
b2e1b302 | 56 | #include <net/cfg80211.h> |
8318d78a | 57 | #include "core.h" |
b2e1b302 | 58 | #include "reg.h" |
ad932f04 | 59 | #include "rdev-ops.h" |
3b377ea9 | 60 | #include "regdb.h" |
73d54c9e | 61 | #include "nl80211.h" |
8318d78a | 62 | |
4113f751 | 63 | #ifdef CONFIG_CFG80211_REG_DEBUG |
12c5ffb5 JP |
64 | #define REG_DBG_PRINT(format, args...) \ |
65 | printk(KERN_DEBUG pr_fmt(format), ##args) | |
4113f751 | 66 | #else |
8271195e | 67 | #define REG_DBG_PRINT(args...) |
4113f751 LR |
68 | #endif |
69 | ||
ad932f04 AN |
70 | /* |
71 | * Grace period we give before making sure all current interfaces reside on | |
72 | * channels allowed by the current regulatory domain. | |
73 | */ | |
74 | #define REG_ENFORCE_GRACE_MS 60000 | |
75 | ||
52616f2b IP |
76 | /** |
77 | * enum reg_request_treatment - regulatory request treatment | |
78 | * | |
79 | * @REG_REQ_OK: continue processing the regulatory request | |
80 | * @REG_REQ_IGNORE: ignore the regulatory request | |
81 | * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should | |
82 | * be intersected with the current one. | |
83 | * @REG_REQ_ALREADY_SET: the regulatory request will not change the current | |
84 | * regulatory settings, and no further processing is required. | |
52616f2b | 85 | */ |
2f92212b JB |
86 | enum reg_request_treatment { |
87 | REG_REQ_OK, | |
88 | REG_REQ_IGNORE, | |
89 | REG_REQ_INTERSECT, | |
90 | REG_REQ_ALREADY_SET, | |
91 | }; | |
92 | ||
a042994d LR |
93 | static struct regulatory_request core_request_world = { |
94 | .initiator = NL80211_REGDOM_SET_BY_CORE, | |
95 | .alpha2[0] = '0', | |
96 | .alpha2[1] = '0', | |
97 | .intersect = false, | |
98 | .processed = true, | |
99 | .country_ie_env = ENVIRON_ANY, | |
100 | }; | |
101 | ||
38fd2143 JB |
102 | /* |
103 | * Receipt of information from last regulatory request, | |
104 | * protected by RTNL (and can be accessed with RCU protection) | |
105 | */ | |
c492db37 | 106 | static struct regulatory_request __rcu *last_request = |
cec3f0ed | 107 | (void __force __rcu *)&core_request_world; |
734366de | 108 | |
b2e1b302 LR |
109 | /* To trigger userspace events */ |
110 | static struct platform_device *reg_pdev; | |
8318d78a | 111 | |
fb1fc7ad LR |
112 | /* |
113 | * Central wireless core regulatory domains, we only need two, | |
734366de | 114 | * the current one and a world regulatory domain in case we have no |
e8da2bb4 | 115 | * information to give us an alpha2. |
38fd2143 | 116 | * (protected by RTNL, can be read under RCU) |
fb1fc7ad | 117 | */ |
458f4f9e | 118 | const struct ieee80211_regdomain __rcu *cfg80211_regdomain; |
734366de | 119 | |
57b5ce07 LR |
120 | /* |
121 | * Number of devices that registered to the core | |
122 | * that support cellular base station regulatory hints | |
38fd2143 | 123 | * (protected by RTNL) |
57b5ce07 LR |
124 | */ |
125 | static int reg_num_devs_support_basehint; | |
126 | ||
52616f2b IP |
127 | /* |
128 | * State variable indicating if the platform on which the devices | |
129 | * are attached is operating in an indoor environment. The state variable | |
130 | * is relevant for all registered devices. | |
52616f2b IP |
131 | */ |
132 | static bool reg_is_indoor; | |
05050753 I |
133 | static spinlock_t reg_indoor_lock; |
134 | ||
135 | /* Used to track the userspace process controlling the indoor setting */ | |
136 | static u32 reg_is_indoor_portid; | |
52616f2b | 137 | |
b6863036 | 138 | static void restore_regulatory_settings(bool reset_user); |
c37722bd | 139 | |
458f4f9e JB |
140 | static const struct ieee80211_regdomain *get_cfg80211_regdom(void) |
141 | { | |
38fd2143 | 142 | return rtnl_dereference(cfg80211_regdomain); |
458f4f9e JB |
143 | } |
144 | ||
ad30ca2c | 145 | const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) |
458f4f9e | 146 | { |
38fd2143 | 147 | return rtnl_dereference(wiphy->regd); |
458f4f9e JB |
148 | } |
149 | ||
3ef121b5 LR |
150 | static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region) |
151 | { | |
152 | switch (dfs_region) { | |
153 | case NL80211_DFS_UNSET: | |
154 | return "unset"; | |
155 | case NL80211_DFS_FCC: | |
156 | return "FCC"; | |
157 | case NL80211_DFS_ETSI: | |
158 | return "ETSI"; | |
159 | case NL80211_DFS_JP: | |
160 | return "JP"; | |
161 | } | |
162 | return "Unknown"; | |
163 | } | |
164 | ||
6c474799 LR |
165 | enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy) |
166 | { | |
167 | const struct ieee80211_regdomain *regd = NULL; | |
168 | const struct ieee80211_regdomain *wiphy_regd = NULL; | |
169 | ||
170 | regd = get_cfg80211_regdom(); | |
171 | if (!wiphy) | |
172 | goto out; | |
173 | ||
174 | wiphy_regd = get_wiphy_regdom(wiphy); | |
175 | if (!wiphy_regd) | |
176 | goto out; | |
177 | ||
178 | if (wiphy_regd->dfs_region == regd->dfs_region) | |
179 | goto out; | |
180 | ||
181 | REG_DBG_PRINT("%s: device specific dfs_region " | |
182 | "(%s) disagrees with cfg80211's " | |
183 | "central dfs_region (%s)\n", | |
184 | dev_name(&wiphy->dev), | |
185 | reg_dfs_region_str(wiphy_regd->dfs_region), | |
186 | reg_dfs_region_str(regd->dfs_region)); | |
187 | ||
188 | out: | |
189 | return regd->dfs_region; | |
190 | } | |
191 | ||
458f4f9e JB |
192 | static void rcu_free_regdom(const struct ieee80211_regdomain *r) |
193 | { | |
194 | if (!r) | |
195 | return; | |
196 | kfree_rcu((struct ieee80211_regdomain *)r, rcu_head); | |
197 | } | |
198 | ||
c492db37 JB |
199 | static struct regulatory_request *get_last_request(void) |
200 | { | |
38fd2143 | 201 | return rcu_dereference_rtnl(last_request); |
c492db37 JB |
202 | } |
203 | ||
e38f8a7a | 204 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
205 | static LIST_HEAD(reg_requests_list); |
206 | static spinlock_t reg_requests_lock; | |
207 | ||
e38f8a7a LR |
208 | /* Used to queue up beacon hints for review */ |
209 | static LIST_HEAD(reg_pending_beacons); | |
210 | static spinlock_t reg_pending_beacons_lock; | |
211 | ||
212 | /* Used to keep track of processed beacon hints */ | |
213 | static LIST_HEAD(reg_beacon_list); | |
214 | ||
215 | struct reg_beacon { | |
216 | struct list_head list; | |
217 | struct ieee80211_channel chan; | |
218 | }; | |
219 | ||
ad932f04 AN |
220 | static void reg_check_chans_work(struct work_struct *work); |
221 | static DECLARE_DELAYED_WORK(reg_check_chans, reg_check_chans_work); | |
222 | ||
f333a7a2 LR |
223 | static void reg_todo(struct work_struct *work); |
224 | static DECLARE_WORK(reg_work, reg_todo); | |
225 | ||
734366de JB |
226 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
227 | static const struct ieee80211_regdomain world_regdom = { | |
28981e5e | 228 | .n_reg_rules = 8, |
734366de JB |
229 | .alpha2 = "00", |
230 | .reg_rules = { | |
68798a62 LR |
231 | /* IEEE 802.11b/g, channels 1..11 */ |
232 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
43c771a1 JB |
233 | /* IEEE 802.11b/g, channels 12..13. */ |
234 | REG_RULE(2467-10, 2472+10, 40, 6, 20, | |
8fe02e16 | 235 | NL80211_RRF_NO_IR), |
611b6a82 LR |
236 | /* IEEE 802.11 channel 14 - Only JP enables |
237 | * this and for 802.11b only */ | |
238 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
8fe02e16 | 239 | NL80211_RRF_NO_IR | |
611b6a82 LR |
240 | NL80211_RRF_NO_OFDM), |
241 | /* IEEE 802.11a, channel 36..48 */ | |
131a19bc | 242 | REG_RULE(5180-10, 5240+10, 160, 6, 20, |
8fe02e16 | 243 | NL80211_RRF_NO_IR), |
3fc71f77 | 244 | |
131a19bc JB |
245 | /* IEEE 802.11a, channel 52..64 - DFS required */ |
246 | REG_RULE(5260-10, 5320+10, 160, 6, 20, | |
8fe02e16 | 247 | NL80211_RRF_NO_IR | |
131a19bc JB |
248 | NL80211_RRF_DFS), |
249 | ||
250 | /* IEEE 802.11a, channel 100..144 - DFS required */ | |
251 | REG_RULE(5500-10, 5720+10, 160, 6, 20, | |
8fe02e16 | 252 | NL80211_RRF_NO_IR | |
131a19bc | 253 | NL80211_RRF_DFS), |
3fc71f77 LR |
254 | |
255 | /* IEEE 802.11a, channel 149..165 */ | |
8ab9d85c | 256 | REG_RULE(5745-10, 5825+10, 80, 6, 20, |
8fe02e16 | 257 | NL80211_RRF_NO_IR), |
90cdc6df | 258 | |
8047d261 | 259 | /* IEEE 802.11ad (60GHz), channels 1..3 */ |
90cdc6df | 260 | REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), |
734366de JB |
261 | } |
262 | }; | |
263 | ||
38fd2143 | 264 | /* protected by RTNL */ |
a3d2eaf0 JB |
265 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
266 | &world_regdom; | |
734366de | 267 | |
6ee7d330 | 268 | static char *ieee80211_regdom = "00"; |
09d989d1 | 269 | static char user_alpha2[2]; |
6ee7d330 | 270 | |
734366de JB |
271 | module_param(ieee80211_regdom, charp, 0444); |
272 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
273 | ||
c888393b | 274 | static void reg_free_request(struct regulatory_request *request) |
5ad6ef5e | 275 | { |
d34265a3 JB |
276 | if (request == &core_request_world) |
277 | return; | |
278 | ||
c888393b AN |
279 | if (request != get_last_request()) |
280 | kfree(request); | |
281 | } | |
282 | ||
283 | static void reg_free_last_request(void) | |
284 | { | |
285 | struct regulatory_request *lr = get_last_request(); | |
286 | ||
5ad6ef5e LR |
287 | if (lr != &core_request_world && lr) |
288 | kfree_rcu(lr, rcu_head); | |
289 | } | |
290 | ||
05f1a3ea LR |
291 | static void reg_update_last_request(struct regulatory_request *request) |
292 | { | |
255e25b0 LR |
293 | struct regulatory_request *lr; |
294 | ||
295 | lr = get_last_request(); | |
296 | if (lr == request) | |
297 | return; | |
298 | ||
c888393b | 299 | reg_free_last_request(); |
05f1a3ea LR |
300 | rcu_assign_pointer(last_request, request); |
301 | } | |
302 | ||
379b82f4 JB |
303 | static void reset_regdomains(bool full_reset, |
304 | const struct ieee80211_regdomain *new_regdom) | |
734366de | 305 | { |
458f4f9e JB |
306 | const struct ieee80211_regdomain *r; |
307 | ||
38fd2143 | 308 | ASSERT_RTNL(); |
e8da2bb4 | 309 | |
458f4f9e JB |
310 | r = get_cfg80211_regdom(); |
311 | ||
942b25cf | 312 | /* avoid freeing static information or freeing something twice */ |
458f4f9e JB |
313 | if (r == cfg80211_world_regdom) |
314 | r = NULL; | |
942b25cf JB |
315 | if (cfg80211_world_regdom == &world_regdom) |
316 | cfg80211_world_regdom = NULL; | |
458f4f9e JB |
317 | if (r == &world_regdom) |
318 | r = NULL; | |
942b25cf | 319 | |
458f4f9e JB |
320 | rcu_free_regdom(r); |
321 | rcu_free_regdom(cfg80211_world_regdom); | |
734366de | 322 | |
a3d2eaf0 | 323 | cfg80211_world_regdom = &world_regdom; |
458f4f9e | 324 | rcu_assign_pointer(cfg80211_regdomain, new_regdom); |
a042994d LR |
325 | |
326 | if (!full_reset) | |
327 | return; | |
328 | ||
05f1a3ea | 329 | reg_update_last_request(&core_request_world); |
734366de JB |
330 | } |
331 | ||
fb1fc7ad LR |
332 | /* |
333 | * Dynamic world regulatory domain requested by the wireless | |
334 | * core upon initialization | |
335 | */ | |
a3d2eaf0 | 336 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 337 | { |
c492db37 | 338 | struct regulatory_request *lr; |
734366de | 339 | |
c492db37 JB |
340 | lr = get_last_request(); |
341 | ||
342 | WARN_ON(!lr); | |
734366de | 343 | |
379b82f4 | 344 | reset_regdomains(false, rd); |
734366de JB |
345 | |
346 | cfg80211_world_regdom = rd; | |
734366de | 347 | } |
734366de | 348 | |
a3d2eaf0 | 349 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
350 | { |
351 | if (!alpha2) | |
352 | return false; | |
1a919318 | 353 | return alpha2[0] == '0' && alpha2[1] == '0'; |
b2e1b302 | 354 | } |
8318d78a | 355 | |
a3d2eaf0 | 356 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
357 | { |
358 | if (!alpha2) | |
359 | return false; | |
1a919318 | 360 | return alpha2[0] && alpha2[1]; |
b2e1b302 | 361 | } |
8318d78a | 362 | |
a3d2eaf0 | 363 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
364 | { |
365 | if (!alpha2) | |
366 | return false; | |
fb1fc7ad LR |
367 | /* |
368 | * Special case where regulatory domain was built by driver | |
369 | * but a specific alpha2 cannot be determined | |
370 | */ | |
1a919318 | 371 | return alpha2[0] == '9' && alpha2[1] == '9'; |
b2e1b302 | 372 | } |
8318d78a | 373 | |
3f2355cb LR |
374 | static bool is_intersected_alpha2(const char *alpha2) |
375 | { | |
376 | if (!alpha2) | |
377 | return false; | |
fb1fc7ad LR |
378 | /* |
379 | * Special case where regulatory domain is the | |
3f2355cb | 380 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
381 | * structures |
382 | */ | |
1a919318 | 383 | return alpha2[0] == '9' && alpha2[1] == '8'; |
3f2355cb LR |
384 | } |
385 | ||
a3d2eaf0 | 386 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
387 | { |
388 | if (!alpha2) | |
389 | return false; | |
1a919318 | 390 | return isalpha(alpha2[0]) && isalpha(alpha2[1]); |
b2e1b302 | 391 | } |
8318d78a | 392 | |
a3d2eaf0 | 393 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
394 | { |
395 | if (!alpha2_x || !alpha2_y) | |
396 | return false; | |
1a919318 | 397 | return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; |
b2e1b302 LR |
398 | } |
399 | ||
69b1572b | 400 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 401 | { |
458f4f9e | 402 | const struct ieee80211_regdomain *r = get_cfg80211_regdom(); |
761cf7ec | 403 | |
458f4f9e | 404 | if (!r) |
b2e1b302 | 405 | return true; |
458f4f9e | 406 | return !alpha2_equal(r->alpha2, alpha2); |
b2e1b302 LR |
407 | } |
408 | ||
09d989d1 LR |
409 | /* |
410 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
411 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
412 | * has ever been issued. | |
413 | */ | |
414 | static bool is_user_regdom_saved(void) | |
415 | { | |
416 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
417 | return false; | |
418 | ||
419 | /* This would indicate a mistake on the design */ | |
1a919318 | 420 | if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), |
09d989d1 | 421 | "Unexpected user alpha2: %c%c\n", |
1a919318 | 422 | user_alpha2[0], user_alpha2[1])) |
09d989d1 LR |
423 | return false; |
424 | ||
425 | return true; | |
426 | } | |
427 | ||
e9763c3c JB |
428 | static const struct ieee80211_regdomain * |
429 | reg_copy_regd(const struct ieee80211_regdomain *src_regd) | |
3b377ea9 JL |
430 | { |
431 | struct ieee80211_regdomain *regd; | |
e9763c3c | 432 | int size_of_regd; |
3b377ea9 JL |
433 | unsigned int i; |
434 | ||
82f20856 JB |
435 | size_of_regd = |
436 | sizeof(struct ieee80211_regdomain) + | |
437 | src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); | |
3b377ea9 JL |
438 | |
439 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
440 | if (!regd) | |
e9763c3c | 441 | return ERR_PTR(-ENOMEM); |
3b377ea9 JL |
442 | |
443 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
444 | ||
445 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
446 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
e9763c3c | 447 | sizeof(struct ieee80211_reg_rule)); |
3b377ea9 | 448 | |
e9763c3c | 449 | return regd; |
3b377ea9 JL |
450 | } |
451 | ||
452 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB | |
c7d319e5 | 453 | struct reg_regdb_apply_request { |
3b377ea9 | 454 | struct list_head list; |
c7d319e5 | 455 | const struct ieee80211_regdomain *regdom; |
3b377ea9 JL |
456 | }; |
457 | ||
c7d319e5 JB |
458 | static LIST_HEAD(reg_regdb_apply_list); |
459 | static DEFINE_MUTEX(reg_regdb_apply_mutex); | |
3b377ea9 | 460 | |
c7d319e5 | 461 | static void reg_regdb_apply(struct work_struct *work) |
3b377ea9 | 462 | { |
c7d319e5 | 463 | struct reg_regdb_apply_request *request; |
a85d0d7f | 464 | |
5fe231e8 | 465 | rtnl_lock(); |
3b377ea9 | 466 | |
c7d319e5 JB |
467 | mutex_lock(®_regdb_apply_mutex); |
468 | while (!list_empty(®_regdb_apply_list)) { | |
469 | request = list_first_entry(®_regdb_apply_list, | |
470 | struct reg_regdb_apply_request, | |
3b377ea9 JL |
471 | list); |
472 | list_del(&request->list); | |
473 | ||
c7d319e5 | 474 | set_regdom(request->regdom, REGD_SOURCE_INTERNAL_DB); |
3b377ea9 JL |
475 | kfree(request); |
476 | } | |
c7d319e5 | 477 | mutex_unlock(®_regdb_apply_mutex); |
a85d0d7f | 478 | |
5fe231e8 | 479 | rtnl_unlock(); |
3b377ea9 JL |
480 | } |
481 | ||
c7d319e5 | 482 | static DECLARE_WORK(reg_regdb_work, reg_regdb_apply); |
3b377ea9 | 483 | |
fd453d3c | 484 | static int reg_query_builtin(const char *alpha2) |
3b377ea9 | 485 | { |
c7d319e5 JB |
486 | const struct ieee80211_regdomain *regdom = NULL; |
487 | struct reg_regdb_apply_request *request; | |
488 | unsigned int i; | |
489 | ||
490 | for (i = 0; i < reg_regdb_size; i++) { | |
491 | if (alpha2_equal(alpha2, reg_regdb[i]->alpha2)) { | |
492 | regdom = reg_regdb[i]; | |
493 | break; | |
494 | } | |
495 | } | |
496 | ||
497 | if (!regdom) | |
498 | return -ENODATA; | |
3b377ea9 | 499 | |
c7d319e5 | 500 | request = kzalloc(sizeof(struct reg_regdb_apply_request), GFP_KERNEL); |
3b377ea9 | 501 | if (!request) |
c7d319e5 | 502 | return -ENOMEM; |
3b377ea9 | 503 | |
c7d319e5 JB |
504 | request->regdom = reg_copy_regd(regdom); |
505 | if (IS_ERR_OR_NULL(request->regdom)) { | |
506 | kfree(request); | |
507 | return -ENOMEM; | |
508 | } | |
3b377ea9 | 509 | |
c7d319e5 JB |
510 | mutex_lock(®_regdb_apply_mutex); |
511 | list_add_tail(&request->list, ®_regdb_apply_list); | |
512 | mutex_unlock(®_regdb_apply_mutex); | |
3b377ea9 JL |
513 | |
514 | schedule_work(®_regdb_work); | |
c7d319e5 JB |
515 | |
516 | return 0; | |
3b377ea9 | 517 | } |
80007efe LR |
518 | |
519 | /* Feel free to add any other sanity checks here */ | |
520 | static void reg_regdb_size_check(void) | |
521 | { | |
522 | /* We should ideally BUILD_BUG_ON() but then random builds would fail */ | |
523 | WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); | |
524 | } | |
3b377ea9 | 525 | #else |
80007efe | 526 | static inline void reg_regdb_size_check(void) {} |
fd453d3c | 527 | static inline int reg_query_builtin(const char *alpha2) |
c7d319e5 JB |
528 | { |
529 | return -ENODATA; | |
530 | } | |
3b377ea9 JL |
531 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ |
532 | ||
b6863036 JB |
533 | #ifdef CONFIG_CFG80211_CRDA_SUPPORT |
534 | /* Max number of consecutive attempts to communicate with CRDA */ | |
535 | #define REG_MAX_CRDA_TIMEOUTS 10 | |
536 | ||
537 | static u32 reg_crda_timeouts; | |
538 | ||
539 | static void crda_timeout_work(struct work_struct *work); | |
540 | static DECLARE_DELAYED_WORK(crda_timeout, crda_timeout_work); | |
541 | ||
542 | static void crda_timeout_work(struct work_struct *work) | |
543 | { | |
544 | REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); | |
545 | rtnl_lock(); | |
546 | reg_crda_timeouts++; | |
547 | restore_regulatory_settings(true); | |
548 | rtnl_unlock(); | |
549 | } | |
550 | ||
551 | static void cancel_crda_timeout(void) | |
552 | { | |
553 | cancel_delayed_work(&crda_timeout); | |
554 | } | |
555 | ||
556 | static void cancel_crda_timeout_sync(void) | |
557 | { | |
558 | cancel_delayed_work_sync(&crda_timeout); | |
559 | } | |
560 | ||
561 | static void reset_crda_timeouts(void) | |
562 | { | |
563 | reg_crda_timeouts = 0; | |
564 | } | |
565 | ||
fb1fc7ad LR |
566 | /* |
567 | * This lets us keep regulatory code which is updated on a regulatory | |
1226d258 | 568 | * basis in userspace. |
fb1fc7ad | 569 | */ |
b2e1b302 LR |
570 | static int call_crda(const char *alpha2) |
571 | { | |
1226d258 JB |
572 | char country[12]; |
573 | char *env[] = { country, NULL }; | |
c7d319e5 | 574 | int ret; |
1226d258 JB |
575 | |
576 | snprintf(country, sizeof(country), "COUNTRY=%c%c", | |
577 | alpha2[0], alpha2[1]); | |
578 | ||
c37722bd | 579 | if (reg_crda_timeouts > REG_MAX_CRDA_TIMEOUTS) { |
042ab5fc | 580 | pr_debug("Exceeded CRDA call max attempts. Not calling CRDA\n"); |
c37722bd I |
581 | return -EINVAL; |
582 | } | |
583 | ||
b2e1b302 | 584 | if (!is_world_regdom((char *) alpha2)) |
042ab5fc | 585 | pr_debug("Calling CRDA for country: %c%c\n", |
b2e1b302 LR |
586 | alpha2[0], alpha2[1]); |
587 | else | |
042ab5fc | 588 | pr_debug("Calling CRDA to update world regulatory domain\n"); |
b2e1b302 | 589 | |
c7d319e5 JB |
590 | ret = kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env); |
591 | if (ret) | |
592 | return ret; | |
593 | ||
594 | queue_delayed_work(system_power_efficient_wq, | |
b6863036 | 595 | &crda_timeout, msecs_to_jiffies(3142)); |
c7d319e5 | 596 | return 0; |
b2e1b302 | 597 | } |
b6863036 JB |
598 | #else |
599 | static inline void cancel_crda_timeout(void) {} | |
600 | static inline void cancel_crda_timeout_sync(void) {} | |
601 | static inline void reset_crda_timeouts(void) {} | |
602 | static inline int call_crda(const char *alpha2) | |
603 | { | |
604 | return -ENODATA; | |
605 | } | |
606 | #endif /* CONFIG_CFG80211_CRDA_SUPPORT */ | |
b2e1b302 | 607 | |
cecbb069 | 608 | static bool reg_query_database(struct regulatory_request *request) |
fe6631ff | 609 | { |
c7d319e5 | 610 | /* query internal regulatory database (if it exists) */ |
fd453d3c | 611 | if (reg_query_builtin(request->alpha2) == 0) |
c7d319e5 | 612 | return true; |
eeca9fce | 613 | |
c7d319e5 JB |
614 | if (call_crda(request->alpha2) == 0) |
615 | return true; | |
616 | ||
617 | return false; | |
fe6631ff LR |
618 | } |
619 | ||
e438768f | 620 | bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 621 | { |
c492db37 | 622 | struct regulatory_request *lr = get_last_request(); |
61405e97 | 623 | |
c492db37 | 624 | if (!lr || lr->processed) |
f6037d09 JB |
625 | return false; |
626 | ||
c492db37 | 627 | return alpha2_equal(lr->alpha2, alpha2); |
b2e1b302 | 628 | } |
8318d78a | 629 | |
e3961af1 JD |
630 | static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy) |
631 | { | |
632 | struct regulatory_request *lr = get_last_request(); | |
633 | ||
634 | /* | |
635 | * Follow the driver's regulatory domain, if present, unless a country | |
636 | * IE has been processed or a user wants to help complaince further | |
637 | */ | |
638 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
639 | lr->initiator != NL80211_REGDOM_SET_BY_USER && | |
640 | wiphy->regd) | |
641 | return get_wiphy_regdom(wiphy); | |
642 | ||
643 | return get_cfg80211_regdom(); | |
644 | } | |
645 | ||
a6d4a534 AN |
646 | static unsigned int |
647 | reg_get_max_bandwidth_from_range(const struct ieee80211_regdomain *rd, | |
648 | const struct ieee80211_reg_rule *rule) | |
97524820 JD |
649 | { |
650 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; | |
651 | const struct ieee80211_freq_range *freq_range_tmp; | |
652 | const struct ieee80211_reg_rule *tmp; | |
653 | u32 start_freq, end_freq, idx, no; | |
654 | ||
655 | for (idx = 0; idx < rd->n_reg_rules; idx++) | |
656 | if (rule == &rd->reg_rules[idx]) | |
657 | break; | |
658 | ||
659 | if (idx == rd->n_reg_rules) | |
660 | return 0; | |
661 | ||
662 | /* get start_freq */ | |
663 | no = idx; | |
664 | ||
665 | while (no) { | |
666 | tmp = &rd->reg_rules[--no]; | |
667 | freq_range_tmp = &tmp->freq_range; | |
668 | ||
669 | if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz) | |
670 | break; | |
671 | ||
97524820 JD |
672 | freq_range = freq_range_tmp; |
673 | } | |
674 | ||
675 | start_freq = freq_range->start_freq_khz; | |
676 | ||
677 | /* get end_freq */ | |
678 | freq_range = &rule->freq_range; | |
679 | no = idx; | |
680 | ||
681 | while (no < rd->n_reg_rules - 1) { | |
682 | tmp = &rd->reg_rules[++no]; | |
683 | freq_range_tmp = &tmp->freq_range; | |
684 | ||
685 | if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz) | |
686 | break; | |
687 | ||
97524820 JD |
688 | freq_range = freq_range_tmp; |
689 | } | |
690 | ||
691 | end_freq = freq_range->end_freq_khz; | |
692 | ||
693 | return end_freq - start_freq; | |
694 | } | |
695 | ||
a6d4a534 AN |
696 | unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd, |
697 | const struct ieee80211_reg_rule *rule) | |
698 | { | |
699 | unsigned int bw = reg_get_max_bandwidth_from_range(rd, rule); | |
700 | ||
701 | if (rule->flags & NL80211_RRF_NO_160MHZ) | |
702 | bw = min_t(unsigned int, bw, MHZ_TO_KHZ(80)); | |
703 | if (rule->flags & NL80211_RRF_NO_80MHZ) | |
704 | bw = min_t(unsigned int, bw, MHZ_TO_KHZ(40)); | |
705 | ||
706 | /* | |
707 | * HT40+/HT40- limits are handled per-channel. Only limit BW if both | |
708 | * are not allowed. | |
709 | */ | |
710 | if (rule->flags & NL80211_RRF_NO_HT40MINUS && | |
711 | rule->flags & NL80211_RRF_NO_HT40PLUS) | |
712 | bw = min_t(unsigned int, bw, MHZ_TO_KHZ(20)); | |
713 | ||
714 | return bw; | |
715 | } | |
716 | ||
b2e1b302 | 717 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 718 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 719 | { |
a3d2eaf0 | 720 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
721 | u32 freq_diff; |
722 | ||
91e99004 | 723 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
724 | return false; |
725 | ||
726 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
727 | return false; | |
728 | ||
729 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
730 | ||
bd05f28e | 731 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
1a919318 | 732 | freq_range->max_bandwidth_khz > freq_diff) |
b2e1b302 LR |
733 | return false; |
734 | ||
735 | return true; | |
736 | } | |
737 | ||
a3d2eaf0 | 738 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 739 | { |
a3d2eaf0 | 740 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 741 | unsigned int i; |
8318d78a | 742 | |
b2e1b302 LR |
743 | if (!rd->n_reg_rules) |
744 | return false; | |
8318d78a | 745 | |
88dc1c3f LR |
746 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
747 | return false; | |
748 | ||
b2e1b302 LR |
749 | for (i = 0; i < rd->n_reg_rules; i++) { |
750 | reg_rule = &rd->reg_rules[i]; | |
751 | if (!is_valid_reg_rule(reg_rule)) | |
752 | return false; | |
753 | } | |
754 | ||
755 | return true; | |
8318d78a JB |
756 | } |
757 | ||
038659e7 | 758 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
fe7ef5e9 | 759 | u32 center_freq_khz, u32 bw_khz) |
b2e1b302 | 760 | { |
038659e7 LR |
761 | u32 start_freq_khz, end_freq_khz; |
762 | ||
763 | start_freq_khz = center_freq_khz - (bw_khz/2); | |
764 | end_freq_khz = center_freq_khz + (bw_khz/2); | |
765 | ||
766 | if (start_freq_khz >= freq_range->start_freq_khz && | |
767 | end_freq_khz <= freq_range->end_freq_khz) | |
768 | return true; | |
769 | ||
770 | return false; | |
b2e1b302 | 771 | } |
8318d78a | 772 | |
0c7dc45d LR |
773 | /** |
774 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
775 | * @freq_range: frequency rule we want to query | |
776 | * @freq_khz: frequency we are inquiring about | |
777 | * | |
778 | * This lets us know if a specific frequency rule is or is not relevant to | |
779 | * a specific frequency's band. Bands are device specific and artificial | |
64629b9d VK |
780 | * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), |
781 | * however it is safe for now to assume that a frequency rule should not be | |
782 | * part of a frequency's band if the start freq or end freq are off by more | |
783 | * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the | |
784 | * 60 GHz band. | |
0c7dc45d LR |
785 | * This resolution can be lowered and should be considered as we add |
786 | * regulatory rule support for other "bands". | |
787 | **/ | |
788 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
1a919318 | 789 | u32 freq_khz) |
0c7dc45d LR |
790 | { |
791 | #define ONE_GHZ_IN_KHZ 1000000 | |
64629b9d VK |
792 | /* |
793 | * From 802.11ad: directional multi-gigabit (DMG): | |
794 | * Pertaining to operation in a frequency band containing a channel | |
795 | * with the Channel starting frequency above 45 GHz. | |
796 | */ | |
797 | u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? | |
798 | 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; | |
799 | if (abs(freq_khz - freq_range->start_freq_khz) <= limit) | |
0c7dc45d | 800 | return true; |
64629b9d | 801 | if (abs(freq_khz - freq_range->end_freq_khz) <= limit) |
0c7dc45d LR |
802 | return true; |
803 | return false; | |
804 | #undef ONE_GHZ_IN_KHZ | |
805 | } | |
806 | ||
adbfb058 LR |
807 | /* |
808 | * Later on we can perhaps use the more restrictive DFS | |
809 | * region but we don't have information for that yet so | |
810 | * for now simply disallow conflicts. | |
811 | */ | |
812 | static enum nl80211_dfs_regions | |
813 | reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1, | |
814 | const enum nl80211_dfs_regions dfs_region2) | |
815 | { | |
816 | if (dfs_region1 != dfs_region2) | |
817 | return NL80211_DFS_UNSET; | |
818 | return dfs_region1; | |
819 | } | |
820 | ||
fb1fc7ad LR |
821 | /* |
822 | * Helper for regdom_intersect(), this does the real | |
823 | * mathematical intersection fun | |
824 | */ | |
97524820 JD |
825 | static int reg_rules_intersect(const struct ieee80211_regdomain *rd1, |
826 | const struct ieee80211_regdomain *rd2, | |
827 | const struct ieee80211_reg_rule *rule1, | |
1a919318 JB |
828 | const struct ieee80211_reg_rule *rule2, |
829 | struct ieee80211_reg_rule *intersected_rule) | |
9c96477d LR |
830 | { |
831 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
832 | struct ieee80211_freq_range *freq_range; | |
833 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
834 | struct ieee80211_power_rule *power_rule; | |
97524820 | 835 | u32 freq_diff, max_bandwidth1, max_bandwidth2; |
9c96477d LR |
836 | |
837 | freq_range1 = &rule1->freq_range; | |
838 | freq_range2 = &rule2->freq_range; | |
839 | freq_range = &intersected_rule->freq_range; | |
840 | ||
841 | power_rule1 = &rule1->power_rule; | |
842 | power_rule2 = &rule2->power_rule; | |
843 | power_rule = &intersected_rule->power_rule; | |
844 | ||
845 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
1a919318 | 846 | freq_range2->start_freq_khz); |
9c96477d | 847 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
1a919318 | 848 | freq_range2->end_freq_khz); |
97524820 JD |
849 | |
850 | max_bandwidth1 = freq_range1->max_bandwidth_khz; | |
851 | max_bandwidth2 = freq_range2->max_bandwidth_khz; | |
852 | ||
b0dfd2ea JD |
853 | if (rule1->flags & NL80211_RRF_AUTO_BW) |
854 | max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1); | |
855 | if (rule2->flags & NL80211_RRF_AUTO_BW) | |
856 | max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2); | |
97524820 JD |
857 | |
858 | freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2); | |
9c96477d | 859 | |
b0dfd2ea JD |
860 | intersected_rule->flags = rule1->flags | rule2->flags; |
861 | ||
862 | /* | |
863 | * In case NL80211_RRF_AUTO_BW requested for both rules | |
864 | * set AUTO_BW in intersected rule also. Next we will | |
865 | * calculate BW correctly in handle_channel function. | |
866 | * In other case remove AUTO_BW flag while we calculate | |
867 | * maximum bandwidth correctly and auto calculation is | |
868 | * not required. | |
869 | */ | |
870 | if ((rule1->flags & NL80211_RRF_AUTO_BW) && | |
871 | (rule2->flags & NL80211_RRF_AUTO_BW)) | |
872 | intersected_rule->flags |= NL80211_RRF_AUTO_BW; | |
873 | else | |
874 | intersected_rule->flags &= ~NL80211_RRF_AUTO_BW; | |
875 | ||
9c96477d LR |
876 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; |
877 | if (freq_range->max_bandwidth_khz > freq_diff) | |
878 | freq_range->max_bandwidth_khz = freq_diff; | |
879 | ||
880 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
881 | power_rule2->max_eirp); | |
882 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
883 | power_rule2->max_antenna_gain); | |
884 | ||
089027e5 JD |
885 | intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms, |
886 | rule2->dfs_cac_ms); | |
887 | ||
9c96477d LR |
888 | if (!is_valid_reg_rule(intersected_rule)) |
889 | return -EINVAL; | |
890 | ||
891 | return 0; | |
892 | } | |
893 | ||
a62a1aed EP |
894 | /* check whether old rule contains new rule */ |
895 | static bool rule_contains(struct ieee80211_reg_rule *r1, | |
896 | struct ieee80211_reg_rule *r2) | |
897 | { | |
898 | /* for simplicity, currently consider only same flags */ | |
899 | if (r1->flags != r2->flags) | |
900 | return false; | |
901 | ||
902 | /* verify r1 is more restrictive */ | |
903 | if ((r1->power_rule.max_antenna_gain > | |
904 | r2->power_rule.max_antenna_gain) || | |
905 | r1->power_rule.max_eirp > r2->power_rule.max_eirp) | |
906 | return false; | |
907 | ||
908 | /* make sure r2's range is contained within r1 */ | |
909 | if (r1->freq_range.start_freq_khz > r2->freq_range.start_freq_khz || | |
910 | r1->freq_range.end_freq_khz < r2->freq_range.end_freq_khz) | |
911 | return false; | |
912 | ||
913 | /* and finally verify that r1.max_bw >= r2.max_bw */ | |
914 | if (r1->freq_range.max_bandwidth_khz < | |
915 | r2->freq_range.max_bandwidth_khz) | |
916 | return false; | |
917 | ||
918 | return true; | |
919 | } | |
920 | ||
921 | /* add or extend current rules. do nothing if rule is already contained */ | |
922 | static void add_rule(struct ieee80211_reg_rule *rule, | |
923 | struct ieee80211_reg_rule *reg_rules, u32 *n_rules) | |
924 | { | |
925 | struct ieee80211_reg_rule *tmp_rule; | |
926 | int i; | |
927 | ||
928 | for (i = 0; i < *n_rules; i++) { | |
929 | tmp_rule = ®_rules[i]; | |
930 | /* rule is already contained - do nothing */ | |
931 | if (rule_contains(tmp_rule, rule)) | |
932 | return; | |
933 | ||
934 | /* extend rule if possible */ | |
935 | if (rule_contains(rule, tmp_rule)) { | |
936 | memcpy(tmp_rule, rule, sizeof(*rule)); | |
937 | return; | |
938 | } | |
939 | } | |
940 | ||
941 | memcpy(®_rules[*n_rules], rule, sizeof(*rule)); | |
942 | (*n_rules)++; | |
943 | } | |
944 | ||
9c96477d LR |
945 | /** |
946 | * regdom_intersect - do the intersection between two regulatory domains | |
947 | * @rd1: first regulatory domain | |
948 | * @rd2: second regulatory domain | |
949 | * | |
950 | * Use this function to get the intersection between two regulatory domains. | |
951 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
952 | * as no one single alpha2 can represent this regulatory domain. | |
953 | * | |
954 | * Returns a pointer to the regulatory domain structure which will hold the | |
955 | * resulting intersection of rules between rd1 and rd2. We will | |
956 | * kzalloc() this structure for you. | |
957 | */ | |
1a919318 JB |
958 | static struct ieee80211_regdomain * |
959 | regdom_intersect(const struct ieee80211_regdomain *rd1, | |
960 | const struct ieee80211_regdomain *rd2) | |
9c96477d LR |
961 | { |
962 | int r, size_of_regd; | |
963 | unsigned int x, y; | |
a62a1aed | 964 | unsigned int num_rules = 0; |
9c96477d | 965 | const struct ieee80211_reg_rule *rule1, *rule2; |
a62a1aed | 966 | struct ieee80211_reg_rule intersected_rule; |
9c96477d | 967 | struct ieee80211_regdomain *rd; |
9c96477d LR |
968 | |
969 | if (!rd1 || !rd2) | |
970 | return NULL; | |
971 | ||
fb1fc7ad LR |
972 | /* |
973 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
974 | * build them. This is to so we can malloc() and free() a |
975 | * regdomain once. The reason we use reg_rules_intersect() here | |
976 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
977 | * All rules that do check out OK are valid. |
978 | */ | |
9c96477d LR |
979 | |
980 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
981 | rule1 = &rd1->reg_rules[x]; | |
982 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
983 | rule2 = &rd2->reg_rules[y]; | |
97524820 | 984 | if (!reg_rules_intersect(rd1, rd2, rule1, rule2, |
a62a1aed | 985 | &intersected_rule)) |
9c96477d | 986 | num_rules++; |
9c96477d LR |
987 | } |
988 | } | |
989 | ||
990 | if (!num_rules) | |
991 | return NULL; | |
992 | ||
993 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
82f20856 | 994 | num_rules * sizeof(struct ieee80211_reg_rule); |
9c96477d LR |
995 | |
996 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
997 | if (!rd) | |
998 | return NULL; | |
999 | ||
a62a1aed | 1000 | for (x = 0; x < rd1->n_reg_rules; x++) { |
9c96477d | 1001 | rule1 = &rd1->reg_rules[x]; |
a62a1aed | 1002 | for (y = 0; y < rd2->n_reg_rules; y++) { |
9c96477d | 1003 | rule2 = &rd2->reg_rules[y]; |
97524820 | 1004 | r = reg_rules_intersect(rd1, rd2, rule1, rule2, |
a62a1aed | 1005 | &intersected_rule); |
fb1fc7ad LR |
1006 | /* |
1007 | * No need to memset here the intersected rule here as | |
1008 | * we're not using the stack anymore | |
1009 | */ | |
9c96477d LR |
1010 | if (r) |
1011 | continue; | |
9c96477d | 1012 | |
a62a1aed EP |
1013 | add_rule(&intersected_rule, rd->reg_rules, |
1014 | &rd->n_reg_rules); | |
1015 | } | |
9c96477d LR |
1016 | } |
1017 | ||
9c96477d LR |
1018 | rd->alpha2[0] = '9'; |
1019 | rd->alpha2[1] = '8'; | |
adbfb058 LR |
1020 | rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region, |
1021 | rd2->dfs_region); | |
9c96477d LR |
1022 | |
1023 | return rd; | |
1024 | } | |
1025 | ||
fb1fc7ad LR |
1026 | /* |
1027 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
1028 | * want to just have the channel structure use these | |
1029 | */ | |
b2e1b302 LR |
1030 | static u32 map_regdom_flags(u32 rd_flags) |
1031 | { | |
1032 | u32 channel_flags = 0; | |
8fe02e16 LR |
1033 | if (rd_flags & NL80211_RRF_NO_IR_ALL) |
1034 | channel_flags |= IEEE80211_CHAN_NO_IR; | |
b2e1b302 LR |
1035 | if (rd_flags & NL80211_RRF_DFS) |
1036 | channel_flags |= IEEE80211_CHAN_RADAR; | |
03f6b084 SF |
1037 | if (rd_flags & NL80211_RRF_NO_OFDM) |
1038 | channel_flags |= IEEE80211_CHAN_NO_OFDM; | |
570dbde1 DS |
1039 | if (rd_flags & NL80211_RRF_NO_OUTDOOR) |
1040 | channel_flags |= IEEE80211_CHAN_INDOOR_ONLY; | |
06f207fc AN |
1041 | if (rd_flags & NL80211_RRF_IR_CONCURRENT) |
1042 | channel_flags |= IEEE80211_CHAN_IR_CONCURRENT; | |
a6d4a534 AN |
1043 | if (rd_flags & NL80211_RRF_NO_HT40MINUS) |
1044 | channel_flags |= IEEE80211_CHAN_NO_HT40MINUS; | |
1045 | if (rd_flags & NL80211_RRF_NO_HT40PLUS) | |
1046 | channel_flags |= IEEE80211_CHAN_NO_HT40PLUS; | |
1047 | if (rd_flags & NL80211_RRF_NO_80MHZ) | |
1048 | channel_flags |= IEEE80211_CHAN_NO_80MHZ; | |
1049 | if (rd_flags & NL80211_RRF_NO_160MHZ) | |
1050 | channel_flags |= IEEE80211_CHAN_NO_160MHZ; | |
b2e1b302 LR |
1051 | return channel_flags; |
1052 | } | |
1053 | ||
361c9c8b | 1054 | static const struct ieee80211_reg_rule * |
49172874 | 1055 | freq_reg_info_regd(u32 center_freq, |
4edd5698 | 1056 | const struct ieee80211_regdomain *regd, u32 bw) |
8318d78a JB |
1057 | { |
1058 | int i; | |
0c7dc45d | 1059 | bool band_rule_found = false; |
038659e7 LR |
1060 | bool bw_fits = false; |
1061 | ||
3e0c3ff3 | 1062 | if (!regd) |
361c9c8b | 1063 | return ERR_PTR(-EINVAL); |
b2e1b302 | 1064 | |
3e0c3ff3 | 1065 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
1066 | const struct ieee80211_reg_rule *rr; |
1067 | const struct ieee80211_freq_range *fr = NULL; | |
b2e1b302 | 1068 | |
3e0c3ff3 | 1069 | rr = ®d->reg_rules[i]; |
b2e1b302 | 1070 | fr = &rr->freq_range; |
0c7dc45d | 1071 | |
fb1fc7ad LR |
1072 | /* |
1073 | * We only need to know if one frequency rule was | |
0c7dc45d | 1074 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
1075 | * not overwrite it once found |
1076 | */ | |
0c7dc45d LR |
1077 | if (!band_rule_found) |
1078 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
1079 | ||
4edd5698 | 1080 | bw_fits = reg_does_bw_fit(fr, center_freq, bw); |
0c7dc45d | 1081 | |
361c9c8b JB |
1082 | if (band_rule_found && bw_fits) |
1083 | return rr; | |
8318d78a JB |
1084 | } |
1085 | ||
0c7dc45d | 1086 | if (!band_rule_found) |
361c9c8b | 1087 | return ERR_PTR(-ERANGE); |
0c7dc45d | 1088 | |
361c9c8b | 1089 | return ERR_PTR(-EINVAL); |
b2e1b302 LR |
1090 | } |
1091 | ||
8de1c63b JB |
1092 | static const struct ieee80211_reg_rule * |
1093 | __freq_reg_info(struct wiphy *wiphy, u32 center_freq, u32 min_bw) | |
1fa25e41 | 1094 | { |
4edd5698 MM |
1095 | const struct ieee80211_regdomain *regd = reg_get_regdomain(wiphy); |
1096 | const struct ieee80211_reg_rule *reg_rule = NULL; | |
1097 | u32 bw; | |
1a919318 | 1098 | |
4edd5698 | 1099 | for (bw = MHZ_TO_KHZ(20); bw >= min_bw; bw = bw / 2) { |
49172874 | 1100 | reg_rule = freq_reg_info_regd(center_freq, regd, bw); |
4edd5698 MM |
1101 | if (!IS_ERR(reg_rule)) |
1102 | return reg_rule; | |
1103 | } | |
5d885b99 | 1104 | |
4edd5698 MM |
1105 | return reg_rule; |
1106 | } | |
1107 | ||
1108 | const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, | |
1109 | u32 center_freq) | |
1110 | { | |
1111 | return __freq_reg_info(wiphy, center_freq, MHZ_TO_KHZ(20)); | |
1fa25e41 | 1112 | } |
4f366c5d | 1113 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 1114 | |
034c6d6e | 1115 | const char *reg_initiator_name(enum nl80211_reg_initiator initiator) |
926a0a09 LR |
1116 | { |
1117 | switch (initiator) { | |
1118 | case NL80211_REGDOM_SET_BY_CORE: | |
034c6d6e | 1119 | return "core"; |
926a0a09 | 1120 | case NL80211_REGDOM_SET_BY_USER: |
034c6d6e | 1121 | return "user"; |
926a0a09 | 1122 | case NL80211_REGDOM_SET_BY_DRIVER: |
034c6d6e | 1123 | return "driver"; |
926a0a09 | 1124 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
034c6d6e | 1125 | return "country IE"; |
926a0a09 LR |
1126 | default: |
1127 | WARN_ON(1); | |
034c6d6e | 1128 | return "bug"; |
926a0a09 LR |
1129 | } |
1130 | } | |
034c6d6e | 1131 | EXPORT_SYMBOL(reg_initiator_name); |
e702d3cf | 1132 | |
b0dfd2ea JD |
1133 | static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, |
1134 | struct ieee80211_channel *chan, | |
e702d3cf LR |
1135 | const struct ieee80211_reg_rule *reg_rule) |
1136 | { | |
81e92574 | 1137 | #ifdef CONFIG_CFG80211_REG_DEBUG |
e702d3cf LR |
1138 | const struct ieee80211_power_rule *power_rule; |
1139 | const struct ieee80211_freq_range *freq_range; | |
b0dfd2ea | 1140 | char max_antenna_gain[32], bw[32]; |
e702d3cf LR |
1141 | |
1142 | power_rule = ®_rule->power_rule; | |
1143 | freq_range = ®_rule->freq_range; | |
1144 | ||
1145 | if (!power_rule->max_antenna_gain) | |
b0dfd2ea | 1146 | snprintf(max_antenna_gain, sizeof(max_antenna_gain), "N/A"); |
e702d3cf | 1147 | else |
9f506802 | 1148 | snprintf(max_antenna_gain, sizeof(max_antenna_gain), "%d mBi", |
b0dfd2ea JD |
1149 | power_rule->max_antenna_gain); |
1150 | ||
1151 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) | |
1152 | snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", | |
1153 | freq_range->max_bandwidth_khz, | |
1154 | reg_get_max_bandwidth(regd, reg_rule)); | |
1155 | else | |
1156 | snprintf(bw, sizeof(bw), "%d KHz", | |
1157 | freq_range->max_bandwidth_khz); | |
e702d3cf | 1158 | |
fe7ef5e9 JB |
1159 | REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n", |
1160 | chan->center_freq); | |
e702d3cf | 1161 | |
9f506802 | 1162 | REG_DBG_PRINT("(%d KHz - %d KHz @ %s), (%s, %d mBm)\n", |
1a919318 | 1163 | freq_range->start_freq_khz, freq_range->end_freq_khz, |
b0dfd2ea | 1164 | bw, max_antenna_gain, |
e702d3cf | 1165 | power_rule->max_eirp); |
926a0a09 | 1166 | #endif |
81e92574 | 1167 | } |
926a0a09 | 1168 | |
1aeb135f MS |
1169 | static uint32_t reg_rule_to_chan_bw_flags(const struct ieee80211_regdomain *regd, |
1170 | const struct ieee80211_reg_rule *reg_rule, | |
1171 | const struct ieee80211_channel *chan) | |
1172 | { | |
1173 | const struct ieee80211_freq_range *freq_range = NULL; | |
1174 | u32 max_bandwidth_khz, bw_flags = 0; | |
1175 | ||
1176 | freq_range = ®_rule->freq_range; | |
1177 | ||
1178 | max_bandwidth_khz = freq_range->max_bandwidth_khz; | |
1179 | /* Check if auto calculation requested */ | |
1180 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) | |
1181 | max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); | |
1182 | ||
1183 | /* If we get a reg_rule we can assume that at least 5Mhz fit */ | |
1184 | if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq), | |
1185 | MHZ_TO_KHZ(10))) | |
1186 | bw_flags |= IEEE80211_CHAN_NO_10MHZ; | |
1187 | if (!reg_does_bw_fit(freq_range, MHZ_TO_KHZ(chan->center_freq), | |
1188 | MHZ_TO_KHZ(20))) | |
1189 | bw_flags |= IEEE80211_CHAN_NO_20MHZ; | |
1190 | ||
1191 | if (max_bandwidth_khz < MHZ_TO_KHZ(10)) | |
1192 | bw_flags |= IEEE80211_CHAN_NO_10MHZ; | |
1193 | if (max_bandwidth_khz < MHZ_TO_KHZ(20)) | |
1194 | bw_flags |= IEEE80211_CHAN_NO_20MHZ; | |
1195 | if (max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
1196 | bw_flags |= IEEE80211_CHAN_NO_HT40; | |
1197 | if (max_bandwidth_khz < MHZ_TO_KHZ(80)) | |
1198 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; | |
1199 | if (max_bandwidth_khz < MHZ_TO_KHZ(160)) | |
1200 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; | |
1201 | return bw_flags; | |
1202 | } | |
1203 | ||
e33e2241 JB |
1204 | /* |
1205 | * Note that right now we assume the desired channel bandwidth | |
1206 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
1207 | * per channel, the primary and the extension channel). | |
038659e7 | 1208 | */ |
7ca43d03 LR |
1209 | static void handle_channel(struct wiphy *wiphy, |
1210 | enum nl80211_reg_initiator initiator, | |
fdc9d7b2 | 1211 | struct ieee80211_channel *chan) |
b2e1b302 | 1212 | { |
038659e7 | 1213 | u32 flags, bw_flags = 0; |
b2e1b302 LR |
1214 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1215 | const struct ieee80211_power_rule *power_rule = NULL; | |
fe33eb39 | 1216 | struct wiphy *request_wiphy = NULL; |
c492db37 | 1217 | struct regulatory_request *lr = get_last_request(); |
97524820 | 1218 | const struct ieee80211_regdomain *regd; |
a92a3ce7 | 1219 | |
c492db37 | 1220 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
a92a3ce7 LR |
1221 | |
1222 | flags = chan->orig_flags; | |
b2e1b302 | 1223 | |
361c9c8b JB |
1224 | reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); |
1225 | if (IS_ERR(reg_rule)) { | |
ca4ffe8f LR |
1226 | /* |
1227 | * We will disable all channels that do not match our | |
25985edc | 1228 | * received regulatory rule unless the hint is coming |
ca4ffe8f LR |
1229 | * from a Country IE and the Country IE had no information |
1230 | * about a band. The IEEE 802.11 spec allows for an AP | |
1231 | * to send only a subset of the regulatory rules allowed, | |
1232 | * so an AP in the US that only supports 2.4 GHz may only send | |
1233 | * a country IE with information for the 2.4 GHz band | |
1234 | * while 5 GHz is still supported. | |
1235 | */ | |
1236 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
361c9c8b | 1237 | PTR_ERR(reg_rule) == -ERANGE) |
ca4ffe8f LR |
1238 | return; |
1239 | ||
cc493e4f LR |
1240 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
1241 | request_wiphy && request_wiphy == wiphy && | |
a2f73b6c | 1242 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
cc493e4f LR |
1243 | REG_DBG_PRINT("Disabling freq %d MHz for good\n", |
1244 | chan->center_freq); | |
1245 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; | |
1246 | chan->flags = chan->orig_flags; | |
1247 | } else { | |
1248 | REG_DBG_PRINT("Disabling freq %d MHz\n", | |
1249 | chan->center_freq); | |
1250 | chan->flags |= IEEE80211_CHAN_DISABLED; | |
1251 | } | |
8318d78a | 1252 | return; |
ca4ffe8f | 1253 | } |
8318d78a | 1254 | |
b0dfd2ea JD |
1255 | regd = reg_get_regdomain(wiphy); |
1256 | chan_reg_rule_print_dbg(regd, chan, reg_rule); | |
e702d3cf | 1257 | |
b2e1b302 | 1258 | power_rule = ®_rule->power_rule; |
1aeb135f | 1259 | bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan); |
b2e1b302 | 1260 | |
c492db37 | 1261 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 1262 | request_wiphy && request_wiphy == wiphy && |
a2f73b6c | 1263 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
fb1fc7ad | 1264 | /* |
25985edc | 1265 | * This guarantees the driver's requested regulatory domain |
f976376d | 1266 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
1267 | * settings |
1268 | */ | |
f976376d | 1269 | chan->flags = chan->orig_flags = |
038659e7 | 1270 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
1271 | chan->max_antenna_gain = chan->orig_mag = |
1272 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
279f0f55 | 1273 | chan->max_reg_power = chan->max_power = chan->orig_mpwr = |
f976376d | 1274 | (int) MBM_TO_DBM(power_rule->max_eirp); |
4f267c11 JD |
1275 | |
1276 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1277 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1278 | if (reg_rule->dfs_cac_ms) | |
1279 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1280 | } | |
1281 | ||
f976376d LR |
1282 | return; |
1283 | } | |
1284 | ||
04f39047 SW |
1285 | chan->dfs_state = NL80211_DFS_USABLE; |
1286 | chan->dfs_state_entered = jiffies; | |
1287 | ||
aa3d7eef | 1288 | chan->beacon_found = false; |
038659e7 | 1289 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
1a919318 JB |
1290 | chan->max_antenna_gain = |
1291 | min_t(int, chan->orig_mag, | |
1292 | MBI_TO_DBI(power_rule->max_antenna_gain)); | |
eccc068e | 1293 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
089027e5 JD |
1294 | |
1295 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1296 | if (reg_rule->dfs_cac_ms) | |
1297 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1298 | else | |
1299 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1300 | } | |
1301 | ||
5e31fc08 SG |
1302 | if (chan->orig_mpwr) { |
1303 | /* | |
a09a85a0 LR |
1304 | * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER |
1305 | * will always follow the passed country IE power settings. | |
5e31fc08 SG |
1306 | */ |
1307 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a09a85a0 | 1308 | wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER) |
5e31fc08 SG |
1309 | chan->max_power = chan->max_reg_power; |
1310 | else | |
1311 | chan->max_power = min(chan->orig_mpwr, | |
1312 | chan->max_reg_power); | |
1313 | } else | |
1314 | chan->max_power = chan->max_reg_power; | |
8318d78a JB |
1315 | } |
1316 | ||
7ca43d03 | 1317 | static void handle_band(struct wiphy *wiphy, |
fdc9d7b2 JB |
1318 | enum nl80211_reg_initiator initiator, |
1319 | struct ieee80211_supported_band *sband) | |
8318d78a | 1320 | { |
a92a3ce7 | 1321 | unsigned int i; |
a92a3ce7 | 1322 | |
fdc9d7b2 JB |
1323 | if (!sband) |
1324 | return; | |
8318d78a JB |
1325 | |
1326 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1327 | handle_channel(wiphy, initiator, &sband->channels[i]); |
8318d78a JB |
1328 | } |
1329 | ||
57b5ce07 LR |
1330 | static bool reg_request_cell_base(struct regulatory_request *request) |
1331 | { | |
1332 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1333 | return false; | |
1a919318 | 1334 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; |
57b5ce07 LR |
1335 | } |
1336 | ||
1337 | bool reg_last_request_cell_base(void) | |
1338 | { | |
38fd2143 | 1339 | return reg_request_cell_base(get_last_request()); |
57b5ce07 LR |
1340 | } |
1341 | ||
94fc661f | 1342 | #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS |
57b5ce07 | 1343 | /* Core specific check */ |
2f92212b JB |
1344 | static enum reg_request_treatment |
1345 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 | 1346 | { |
c492db37 JB |
1347 | struct regulatory_request *lr = get_last_request(); |
1348 | ||
57b5ce07 | 1349 | if (!reg_num_devs_support_basehint) |
2f92212b | 1350 | return REG_REQ_IGNORE; |
57b5ce07 | 1351 | |
c492db37 | 1352 | if (reg_request_cell_base(lr) && |
1a919318 | 1353 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 1354 | return REG_REQ_ALREADY_SET; |
1a919318 | 1355 | |
2f92212b | 1356 | return REG_REQ_OK; |
57b5ce07 LR |
1357 | } |
1358 | ||
1359 | /* Device specific check */ | |
1360 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
1361 | { | |
1a919318 | 1362 | return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); |
57b5ce07 LR |
1363 | } |
1364 | #else | |
a515de66 JB |
1365 | static enum reg_request_treatment |
1366 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 | 1367 | { |
2f92212b | 1368 | return REG_REQ_IGNORE; |
57b5ce07 | 1369 | } |
1a919318 JB |
1370 | |
1371 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
57b5ce07 LR |
1372 | { |
1373 | return true; | |
1374 | } | |
1375 | #endif | |
1376 | ||
fa1fb9cb LR |
1377 | static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy) |
1378 | { | |
a2f73b6c LR |
1379 | if (wiphy->regulatory_flags & REGULATORY_STRICT_REG && |
1380 | !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)) | |
fa1fb9cb LR |
1381 | return true; |
1382 | return false; | |
1383 | } | |
57b5ce07 | 1384 | |
7db90f4a LR |
1385 | static bool ignore_reg_update(struct wiphy *wiphy, |
1386 | enum nl80211_reg_initiator initiator) | |
14b9815a | 1387 | { |
c492db37 JB |
1388 | struct regulatory_request *lr = get_last_request(); |
1389 | ||
b0d7aa59 JD |
1390 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) |
1391 | return true; | |
1392 | ||
c492db37 | 1393 | if (!lr) { |
034c6d6e LR |
1394 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1395 | "since last_request is not set\n", | |
926a0a09 | 1396 | reg_initiator_name(initiator)); |
14b9815a | 1397 | return true; |
926a0a09 LR |
1398 | } |
1399 | ||
7db90f4a | 1400 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
a2f73b6c | 1401 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { |
034c6d6e LR |
1402 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1403 | "since the driver uses its own custom " | |
1404 | "regulatory domain\n", | |
926a0a09 | 1405 | reg_initiator_name(initiator)); |
14b9815a | 1406 | return true; |
926a0a09 LR |
1407 | } |
1408 | ||
fb1fc7ad LR |
1409 | /* |
1410 | * wiphy->regd will be set once the device has its own | |
1411 | * desired regulatory domain set | |
1412 | */ | |
fa1fb9cb | 1413 | if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd && |
749b527b | 1414 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
c492db37 | 1415 | !is_world_regdom(lr->alpha2)) { |
034c6d6e LR |
1416 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1417 | "since the driver requires its own regulatory " | |
1418 | "domain to be set first\n", | |
926a0a09 | 1419 | reg_initiator_name(initiator)); |
14b9815a | 1420 | return true; |
926a0a09 LR |
1421 | } |
1422 | ||
c492db37 | 1423 | if (reg_request_cell_base(lr)) |
57b5ce07 LR |
1424 | return reg_dev_ignore_cell_hint(wiphy); |
1425 | ||
14b9815a LR |
1426 | return false; |
1427 | } | |
1428 | ||
3195e489 LR |
1429 | static bool reg_is_world_roaming(struct wiphy *wiphy) |
1430 | { | |
1431 | const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); | |
1432 | const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); | |
1433 | struct regulatory_request *lr = get_last_request(); | |
1434 | ||
1435 | if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) | |
1436 | return true; | |
1437 | ||
1438 | if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a2f73b6c | 1439 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
3195e489 LR |
1440 | return true; |
1441 | ||
1442 | return false; | |
1443 | } | |
1444 | ||
1a919318 | 1445 | static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, |
e38f8a7a LR |
1446 | struct reg_beacon *reg_beacon) |
1447 | { | |
e38f8a7a LR |
1448 | struct ieee80211_supported_band *sband; |
1449 | struct ieee80211_channel *chan; | |
6bad8766 LR |
1450 | bool channel_changed = false; |
1451 | struct ieee80211_channel chan_before; | |
e38f8a7a | 1452 | |
e38f8a7a LR |
1453 | sband = wiphy->bands[reg_beacon->chan.band]; |
1454 | chan = &sband->channels[chan_idx]; | |
1455 | ||
1456 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1457 | return; | |
1458 | ||
6bad8766 LR |
1459 | if (chan->beacon_found) |
1460 | return; | |
1461 | ||
1462 | chan->beacon_found = true; | |
1463 | ||
0f500a5f LR |
1464 | if (!reg_is_world_roaming(wiphy)) |
1465 | return; | |
1466 | ||
a2f73b6c | 1467 | if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS) |
37184244 LR |
1468 | return; |
1469 | ||
6bad8766 LR |
1470 | chan_before.center_freq = chan->center_freq; |
1471 | chan_before.flags = chan->flags; | |
1472 | ||
8fe02e16 LR |
1473 | if (chan->flags & IEEE80211_CHAN_NO_IR) { |
1474 | chan->flags &= ~IEEE80211_CHAN_NO_IR; | |
6bad8766 | 1475 | channel_changed = true; |
e38f8a7a LR |
1476 | } |
1477 | ||
6bad8766 LR |
1478 | if (channel_changed) |
1479 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1480 | } |
1481 | ||
1482 | /* | |
1483 | * Called when a scan on a wiphy finds a beacon on | |
1484 | * new channel | |
1485 | */ | |
1486 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1487 | struct reg_beacon *reg_beacon) | |
1488 | { | |
1489 | unsigned int i; | |
1490 | struct ieee80211_supported_band *sband; | |
1491 | ||
e38f8a7a LR |
1492 | if (!wiphy->bands[reg_beacon->chan.band]) |
1493 | return; | |
1494 | ||
1495 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1496 | ||
1497 | for (i = 0; i < sband->n_channels; i++) | |
1498 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1499 | } | |
1500 | ||
1501 | /* | |
1502 | * Called upon reg changes or a new wiphy is added | |
1503 | */ | |
1504 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1505 | { | |
1506 | unsigned int i; | |
1507 | struct ieee80211_supported_band *sband; | |
1508 | struct reg_beacon *reg_beacon; | |
1509 | ||
e38f8a7a LR |
1510 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
1511 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1512 | continue; | |
1513 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1514 | for (i = 0; i < sband->n_channels; i++) | |
1515 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1516 | } | |
1517 | } | |
1518 | ||
e38f8a7a LR |
1519 | /* Reap the advantages of previously found beacons */ |
1520 | static void reg_process_beacons(struct wiphy *wiphy) | |
1521 | { | |
b1ed8ddd LR |
1522 | /* |
1523 | * Means we are just firing up cfg80211, so no beacons would | |
1524 | * have been processed yet. | |
1525 | */ | |
1526 | if (!last_request) | |
1527 | return; | |
e38f8a7a LR |
1528 | wiphy_update_beacon_reg(wiphy); |
1529 | } | |
1530 | ||
1a919318 | 1531 | static bool is_ht40_allowed(struct ieee80211_channel *chan) |
038659e7 LR |
1532 | { |
1533 | if (!chan) | |
1a919318 | 1534 | return false; |
038659e7 | 1535 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
1a919318 | 1536 | return false; |
038659e7 | 1537 | /* This would happen when regulatory rules disallow HT40 completely */ |
55b183ad FF |
1538 | if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) |
1539 | return false; | |
1540 | return true; | |
038659e7 LR |
1541 | } |
1542 | ||
1543 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
fdc9d7b2 | 1544 | struct ieee80211_channel *channel) |
038659e7 | 1545 | { |
fdc9d7b2 | 1546 | struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; |
038659e7 LR |
1547 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
1548 | unsigned int i; | |
1549 | ||
1a919318 | 1550 | if (!is_ht40_allowed(channel)) { |
038659e7 LR |
1551 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
1552 | return; | |
1553 | } | |
1554 | ||
1555 | /* | |
1556 | * We need to ensure the extension channels exist to | |
1557 | * be able to use HT40- or HT40+, this finds them (or not) | |
1558 | */ | |
1559 | for (i = 0; i < sband->n_channels; i++) { | |
1560 | struct ieee80211_channel *c = &sband->channels[i]; | |
1a919318 | 1561 | |
038659e7 LR |
1562 | if (c->center_freq == (channel->center_freq - 20)) |
1563 | channel_before = c; | |
1564 | if (c->center_freq == (channel->center_freq + 20)) | |
1565 | channel_after = c; | |
1566 | } | |
1567 | ||
1568 | /* | |
1569 | * Please note that this assumes target bandwidth is 20 MHz, | |
1570 | * if that ever changes we also need to change the below logic | |
1571 | * to include that as well. | |
1572 | */ | |
1a919318 | 1573 | if (!is_ht40_allowed(channel_before)) |
689da1b3 | 1574 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1575 | else |
689da1b3 | 1576 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1577 | |
1a919318 | 1578 | if (!is_ht40_allowed(channel_after)) |
689da1b3 | 1579 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 1580 | else |
689da1b3 | 1581 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
1582 | } |
1583 | ||
1584 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
fdc9d7b2 | 1585 | struct ieee80211_supported_band *sband) |
038659e7 LR |
1586 | { |
1587 | unsigned int i; | |
038659e7 | 1588 | |
fdc9d7b2 JB |
1589 | if (!sband) |
1590 | return; | |
038659e7 LR |
1591 | |
1592 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1593 | reg_process_ht_flags_channel(wiphy, &sband->channels[i]); |
038659e7 LR |
1594 | } |
1595 | ||
1596 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1597 | { | |
1598 | enum ieee80211_band band; | |
1599 | ||
1600 | if (!wiphy) | |
1601 | return; | |
1602 | ||
fdc9d7b2 JB |
1603 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1604 | reg_process_ht_flags_band(wiphy, wiphy->bands[band]); | |
038659e7 LR |
1605 | } |
1606 | ||
0e3802db LR |
1607 | static void reg_call_notifier(struct wiphy *wiphy, |
1608 | struct regulatory_request *request) | |
1609 | { | |
1610 | if (wiphy->reg_notifier) | |
1611 | wiphy->reg_notifier(wiphy, request); | |
1612 | } | |
1613 | ||
ad932f04 AN |
1614 | static bool reg_wdev_chan_valid(struct wiphy *wiphy, struct wireless_dev *wdev) |
1615 | { | |
ad932f04 AN |
1616 | struct cfg80211_chan_def chandef; |
1617 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); | |
20658702 | 1618 | enum nl80211_iftype iftype; |
ad932f04 AN |
1619 | |
1620 | wdev_lock(wdev); | |
20658702 | 1621 | iftype = wdev->iftype; |
ad932f04 | 1622 | |
20658702 | 1623 | /* make sure the interface is active */ |
ad932f04 | 1624 | if (!wdev->netdev || !netif_running(wdev->netdev)) |
20658702 | 1625 | goto wdev_inactive_unlock; |
ad932f04 | 1626 | |
20658702 | 1627 | switch (iftype) { |
ad932f04 AN |
1628 | case NL80211_IFTYPE_AP: |
1629 | case NL80211_IFTYPE_P2P_GO: | |
1630 | if (!wdev->beacon_interval) | |
20658702 AN |
1631 | goto wdev_inactive_unlock; |
1632 | chandef = wdev->chandef; | |
185076d6 AN |
1633 | break; |
1634 | case NL80211_IFTYPE_ADHOC: | |
1635 | if (!wdev->ssid_len) | |
20658702 AN |
1636 | goto wdev_inactive_unlock; |
1637 | chandef = wdev->chandef; | |
ad932f04 AN |
1638 | break; |
1639 | case NL80211_IFTYPE_STATION: | |
1640 | case NL80211_IFTYPE_P2P_CLIENT: | |
ad932f04 AN |
1641 | if (!wdev->current_bss || |
1642 | !wdev->current_bss->pub.channel) | |
20658702 | 1643 | goto wdev_inactive_unlock; |
ad932f04 | 1644 | |
20658702 AN |
1645 | if (!rdev->ops->get_channel || |
1646 | rdev_get_channel(rdev, wdev, &chandef)) | |
1647 | cfg80211_chandef_create(&chandef, | |
1648 | wdev->current_bss->pub.channel, | |
1649 | NL80211_CHAN_NO_HT); | |
ad932f04 AN |
1650 | break; |
1651 | case NL80211_IFTYPE_MONITOR: | |
1652 | case NL80211_IFTYPE_AP_VLAN: | |
1653 | case NL80211_IFTYPE_P2P_DEVICE: | |
1654 | /* no enforcement required */ | |
1655 | break; | |
1656 | default: | |
1657 | /* others not implemented for now */ | |
1658 | WARN_ON(1); | |
1659 | break; | |
1660 | } | |
1661 | ||
ad932f04 | 1662 | wdev_unlock(wdev); |
20658702 AN |
1663 | |
1664 | switch (iftype) { | |
1665 | case NL80211_IFTYPE_AP: | |
1666 | case NL80211_IFTYPE_P2P_GO: | |
1667 | case NL80211_IFTYPE_ADHOC: | |
923b352f | 1668 | return cfg80211_reg_can_beacon_relax(wiphy, &chandef, iftype); |
20658702 AN |
1669 | case NL80211_IFTYPE_STATION: |
1670 | case NL80211_IFTYPE_P2P_CLIENT: | |
1671 | return cfg80211_chandef_usable(wiphy, &chandef, | |
1672 | IEEE80211_CHAN_DISABLED); | |
1673 | default: | |
1674 | break; | |
1675 | } | |
1676 | ||
1677 | return true; | |
1678 | ||
1679 | wdev_inactive_unlock: | |
1680 | wdev_unlock(wdev); | |
1681 | return true; | |
ad932f04 AN |
1682 | } |
1683 | ||
1684 | static void reg_leave_invalid_chans(struct wiphy *wiphy) | |
1685 | { | |
1686 | struct wireless_dev *wdev; | |
1687 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); | |
1688 | ||
1689 | ASSERT_RTNL(); | |
1690 | ||
1691 | list_for_each_entry(wdev, &rdev->wdev_list, list) | |
1692 | if (!reg_wdev_chan_valid(wiphy, wdev)) | |
1693 | cfg80211_leave(rdev, wdev); | |
1694 | } | |
1695 | ||
1696 | static void reg_check_chans_work(struct work_struct *work) | |
1697 | { | |
1698 | struct cfg80211_registered_device *rdev; | |
1699 | ||
1700 | REG_DBG_PRINT("Verifying active interfaces after reg change\n"); | |
1701 | rtnl_lock(); | |
1702 | ||
1703 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) | |
1704 | if (!(rdev->wiphy.regulatory_flags & | |
1705 | REGULATORY_IGNORE_STALE_KICKOFF)) | |
1706 | reg_leave_invalid_chans(&rdev->wiphy); | |
1707 | ||
1708 | rtnl_unlock(); | |
1709 | } | |
1710 | ||
1711 | static void reg_check_channels(void) | |
1712 | { | |
1713 | /* | |
1714 | * Give usermode a chance to do something nicer (move to another | |
1715 | * channel, orderly disconnection), before forcing a disconnection. | |
1716 | */ | |
1717 | mod_delayed_work(system_power_efficient_wq, | |
1718 | ®_check_chans, | |
1719 | msecs_to_jiffies(REG_ENFORCE_GRACE_MS)); | |
1720 | } | |
1721 | ||
eac03e38 SN |
1722 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
1723 | enum nl80211_reg_initiator initiator) | |
b2e1b302 LR |
1724 | { |
1725 | enum ieee80211_band band; | |
c492db37 | 1726 | struct regulatory_request *lr = get_last_request(); |
eac03e38 | 1727 | |
0e3802db LR |
1728 | if (ignore_reg_update(wiphy, initiator)) { |
1729 | /* | |
1730 | * Regulatory updates set by CORE are ignored for custom | |
1731 | * regulatory cards. Let us notify the changes to the driver, | |
1732 | * as some drivers used this to restore its orig_* reg domain. | |
1733 | */ | |
1734 | if (initiator == NL80211_REGDOM_SET_BY_CORE && | |
a2f73b6c | 1735 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
0e3802db | 1736 | reg_call_notifier(wiphy, lr); |
a203c2aa | 1737 | return; |
0e3802db | 1738 | } |
a203c2aa | 1739 | |
c492db37 | 1740 | lr->dfs_region = get_cfg80211_regdom()->dfs_region; |
b68e6b3b | 1741 | |
fdc9d7b2 JB |
1742 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1743 | handle_band(wiphy, initiator, wiphy->bands[band]); | |
a203c2aa | 1744 | |
e38f8a7a | 1745 | reg_process_beacons(wiphy); |
038659e7 | 1746 | reg_process_ht_flags(wiphy); |
0e3802db | 1747 | reg_call_notifier(wiphy, lr); |
b2e1b302 LR |
1748 | } |
1749 | ||
d7549cbb SN |
1750 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
1751 | { | |
1752 | struct cfg80211_registered_device *rdev; | |
4a38994f | 1753 | struct wiphy *wiphy; |
d7549cbb | 1754 | |
5fe231e8 | 1755 | ASSERT_RTNL(); |
458f4f9e | 1756 | |
4a38994f RM |
1757 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1758 | wiphy = &rdev->wiphy; | |
1759 | wiphy_update_regulatory(wiphy, initiator); | |
4a38994f | 1760 | } |
ad932f04 AN |
1761 | |
1762 | reg_check_channels(); | |
d7549cbb SN |
1763 | } |
1764 | ||
1fa25e41 | 1765 | static void handle_channel_custom(struct wiphy *wiphy, |
fdc9d7b2 | 1766 | struct ieee80211_channel *chan, |
1fa25e41 LR |
1767 | const struct ieee80211_regdomain *regd) |
1768 | { | |
038659e7 | 1769 | u32 bw_flags = 0; |
1fa25e41 LR |
1770 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1771 | const struct ieee80211_power_rule *power_rule = NULL; | |
4edd5698 | 1772 | u32 bw; |
ac46d48e | 1773 | |
4edd5698 | 1774 | for (bw = MHZ_TO_KHZ(20); bw >= MHZ_TO_KHZ(5); bw = bw / 2) { |
49172874 | 1775 | reg_rule = freq_reg_info_regd(MHZ_TO_KHZ(chan->center_freq), |
4edd5698 MM |
1776 | regd, bw); |
1777 | if (!IS_ERR(reg_rule)) | |
1778 | break; | |
1779 | } | |
1fa25e41 | 1780 | |
361c9c8b | 1781 | if (IS_ERR(reg_rule)) { |
fe7ef5e9 JB |
1782 | REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n", |
1783 | chan->center_freq); | |
db8dfee5 AN |
1784 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) { |
1785 | chan->flags |= IEEE80211_CHAN_DISABLED; | |
1786 | } else { | |
1787 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; | |
1788 | chan->flags = chan->orig_flags; | |
1789 | } | |
1fa25e41 LR |
1790 | return; |
1791 | } | |
1792 | ||
b0dfd2ea | 1793 | chan_reg_rule_print_dbg(regd, chan, reg_rule); |
e702d3cf | 1794 | |
1fa25e41 | 1795 | power_rule = ®_rule->power_rule; |
1aeb135f | 1796 | bw_flags = reg_rule_to_chan_bw_flags(regd, reg_rule, chan); |
1fa25e41 | 1797 | |
2e18b38f | 1798 | chan->dfs_state_entered = jiffies; |
c7ab5081 AN |
1799 | chan->dfs_state = NL80211_DFS_USABLE; |
1800 | ||
1801 | chan->beacon_found = false; | |
db8dfee5 AN |
1802 | |
1803 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) | |
1804 | chan->flags = chan->orig_flags | bw_flags | | |
1805 | map_regdom_flags(reg_rule->flags); | |
1806 | else | |
1807 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; | |
1808 | ||
1fa25e41 | 1809 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
279f0f55 FF |
1810 | chan->max_reg_power = chan->max_power = |
1811 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
2e18b38f AN |
1812 | |
1813 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1814 | if (reg_rule->dfs_cac_ms) | |
1815 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1816 | else | |
1817 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1818 | } | |
1819 | ||
1820 | chan->max_power = chan->max_reg_power; | |
1fa25e41 LR |
1821 | } |
1822 | ||
fdc9d7b2 JB |
1823 | static void handle_band_custom(struct wiphy *wiphy, |
1824 | struct ieee80211_supported_band *sband, | |
1fa25e41 LR |
1825 | const struct ieee80211_regdomain *regd) |
1826 | { | |
1827 | unsigned int i; | |
1fa25e41 | 1828 | |
fdc9d7b2 JB |
1829 | if (!sband) |
1830 | return; | |
1fa25e41 LR |
1831 | |
1832 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1833 | handle_channel_custom(wiphy, &sband->channels[i], regd); |
1fa25e41 LR |
1834 | } |
1835 | ||
1836 | /* Used by drivers prior to wiphy registration */ | |
1837 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1838 | const struct ieee80211_regdomain *regd) | |
1839 | { | |
1840 | enum ieee80211_band band; | |
bbcf3f02 | 1841 | unsigned int bands_set = 0; |
ac46d48e | 1842 | |
a2f73b6c LR |
1843 | WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG), |
1844 | "wiphy should have REGULATORY_CUSTOM_REG\n"); | |
1845 | wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG; | |
222ea581 | 1846 | |
1fa25e41 | 1847 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
bbcf3f02 LR |
1848 | if (!wiphy->bands[band]) |
1849 | continue; | |
fdc9d7b2 | 1850 | handle_band_custom(wiphy, wiphy->bands[band], regd); |
bbcf3f02 | 1851 | bands_set++; |
b2e1b302 | 1852 | } |
bbcf3f02 LR |
1853 | |
1854 | /* | |
1855 | * no point in calling this if it won't have any effect | |
1a919318 | 1856 | * on your device's supported bands. |
bbcf3f02 LR |
1857 | */ |
1858 | WARN_ON(!bands_set); | |
b2e1b302 | 1859 | } |
1fa25e41 LR |
1860 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1861 | ||
b2e253cf LR |
1862 | static void reg_set_request_processed(void) |
1863 | { | |
1864 | bool need_more_processing = false; | |
c492db37 | 1865 | struct regulatory_request *lr = get_last_request(); |
b2e253cf | 1866 | |
c492db37 | 1867 | lr->processed = true; |
b2e253cf LR |
1868 | |
1869 | spin_lock(®_requests_lock); | |
1870 | if (!list_empty(®_requests_list)) | |
1871 | need_more_processing = true; | |
1872 | spin_unlock(®_requests_lock); | |
1873 | ||
b6863036 | 1874 | cancel_crda_timeout(); |
a90c7a31 | 1875 | |
b2e253cf LR |
1876 | if (need_more_processing) |
1877 | schedule_work(®_work); | |
1878 | } | |
1879 | ||
b3eb7f3f LR |
1880 | /** |
1881 | * reg_process_hint_core - process core regulatory requests | |
1882 | * @pending_request: a pending core regulatory request | |
1883 | * | |
1884 | * The wireless subsystem can use this function to process | |
1885 | * a regulatory request issued by the regulatory core. | |
b3eb7f3f | 1886 | */ |
d34265a3 JB |
1887 | static enum reg_request_treatment |
1888 | reg_process_hint_core(struct regulatory_request *core_request) | |
b3eb7f3f | 1889 | { |
cecbb069 | 1890 | if (reg_query_database(core_request)) { |
25b20dbd JB |
1891 | core_request->intersect = false; |
1892 | core_request->processed = false; | |
1893 | reg_update_last_request(core_request); | |
d34265a3 | 1894 | return REG_REQ_OK; |
25b20dbd | 1895 | } |
d34265a3 JB |
1896 | |
1897 | return REG_REQ_IGNORE; | |
b3eb7f3f LR |
1898 | } |
1899 | ||
0d97a619 LR |
1900 | static enum reg_request_treatment |
1901 | __reg_process_hint_user(struct regulatory_request *user_request) | |
1902 | { | |
1903 | struct regulatory_request *lr = get_last_request(); | |
1904 | ||
1905 | if (reg_request_cell_base(user_request)) | |
1906 | return reg_ignore_cell_hint(user_request); | |
1907 | ||
1908 | if (reg_request_cell_base(lr)) | |
1909 | return REG_REQ_IGNORE; | |
1910 | ||
1911 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
1912 | return REG_REQ_INTERSECT; | |
1913 | /* | |
1914 | * If the user knows better the user should set the regdom | |
1915 | * to their country before the IE is picked up | |
1916 | */ | |
1917 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER && | |
1918 | lr->intersect) | |
1919 | return REG_REQ_IGNORE; | |
1920 | /* | |
1921 | * Process user requests only after previous user/driver/core | |
1922 | * requests have been processed | |
1923 | */ | |
1924 | if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || | |
1925 | lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1926 | lr->initiator == NL80211_REGDOM_SET_BY_USER) && | |
1927 | regdom_changes(lr->alpha2)) | |
1928 | return REG_REQ_IGNORE; | |
1929 | ||
1930 | if (!regdom_changes(user_request->alpha2)) | |
1931 | return REG_REQ_ALREADY_SET; | |
1932 | ||
1933 | return REG_REQ_OK; | |
1934 | } | |
1935 | ||
1936 | /** | |
1937 | * reg_process_hint_user - process user regulatory requests | |
1938 | * @user_request: a pending user regulatory request | |
1939 | * | |
1940 | * The wireless subsystem can use this function to process | |
1941 | * a regulatory request initiated by userspace. | |
0d97a619 | 1942 | */ |
d34265a3 JB |
1943 | static enum reg_request_treatment |
1944 | reg_process_hint_user(struct regulatory_request *user_request) | |
0d97a619 LR |
1945 | { |
1946 | enum reg_request_treatment treatment; | |
0d97a619 LR |
1947 | |
1948 | treatment = __reg_process_hint_user(user_request); | |
1949 | if (treatment == REG_REQ_IGNORE || | |
d34265a3 JB |
1950 | treatment == REG_REQ_ALREADY_SET) |
1951 | return REG_REQ_IGNORE; | |
0d97a619 | 1952 | |
0d97a619 LR |
1953 | user_request->intersect = treatment == REG_REQ_INTERSECT; |
1954 | user_request->processed = false; | |
5ad6ef5e | 1955 | |
cecbb069 | 1956 | if (reg_query_database(user_request)) { |
25b20dbd JB |
1957 | reg_update_last_request(user_request); |
1958 | user_alpha2[0] = user_request->alpha2[0]; | |
1959 | user_alpha2[1] = user_request->alpha2[1]; | |
d34265a3 | 1960 | return REG_REQ_OK; |
25b20dbd | 1961 | } |
d34265a3 JB |
1962 | |
1963 | return REG_REQ_IGNORE; | |
0d97a619 LR |
1964 | } |
1965 | ||
21636c7f LR |
1966 | static enum reg_request_treatment |
1967 | __reg_process_hint_driver(struct regulatory_request *driver_request) | |
1968 | { | |
1969 | struct regulatory_request *lr = get_last_request(); | |
1970 | ||
1971 | if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { | |
1972 | if (regdom_changes(driver_request->alpha2)) | |
1973 | return REG_REQ_OK; | |
1974 | return REG_REQ_ALREADY_SET; | |
1975 | } | |
1976 | ||
1977 | /* | |
1978 | * This would happen if you unplug and plug your card | |
1979 | * back in or if you add a new device for which the previously | |
1980 | * loaded card also agrees on the regulatory domain. | |
1981 | */ | |
1982 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && | |
1983 | !regdom_changes(driver_request->alpha2)) | |
1984 | return REG_REQ_ALREADY_SET; | |
1985 | ||
1986 | return REG_REQ_INTERSECT; | |
1987 | } | |
1988 | ||
1989 | /** | |
1990 | * reg_process_hint_driver - process driver regulatory requests | |
1991 | * @driver_request: a pending driver regulatory request | |
1992 | * | |
1993 | * The wireless subsystem can use this function to process | |
1994 | * a regulatory request issued by an 802.11 driver. | |
1995 | * | |
1996 | * Returns one of the different reg request treatment values. | |
1997 | */ | |
1998 | static enum reg_request_treatment | |
1999 | reg_process_hint_driver(struct wiphy *wiphy, | |
2000 | struct regulatory_request *driver_request) | |
2001 | { | |
34f05f54 | 2002 | const struct ieee80211_regdomain *regd, *tmp; |
21636c7f | 2003 | enum reg_request_treatment treatment; |
21636c7f LR |
2004 | |
2005 | treatment = __reg_process_hint_driver(driver_request); | |
2006 | ||
2007 | switch (treatment) { | |
2008 | case REG_REQ_OK: | |
2009 | break; | |
2010 | case REG_REQ_IGNORE: | |
d34265a3 | 2011 | return REG_REQ_IGNORE; |
21636c7f | 2012 | case REG_REQ_INTERSECT: |
21636c7f LR |
2013 | case REG_REQ_ALREADY_SET: |
2014 | regd = reg_copy_regd(get_cfg80211_regdom()); | |
d34265a3 JB |
2015 | if (IS_ERR(regd)) |
2016 | return REG_REQ_IGNORE; | |
34f05f54 AN |
2017 | |
2018 | tmp = get_wiphy_regdom(wiphy); | |
21636c7f | 2019 | rcu_assign_pointer(wiphy->regd, regd); |
34f05f54 | 2020 | rcu_free_regdom(tmp); |
21636c7f LR |
2021 | } |
2022 | ||
21636c7f LR |
2023 | |
2024 | driver_request->intersect = treatment == REG_REQ_INTERSECT; | |
2025 | driver_request->processed = false; | |
5ad6ef5e | 2026 | |
21636c7f LR |
2027 | /* |
2028 | * Since CRDA will not be called in this case as we already | |
2029 | * have applied the requested regulatory domain before we just | |
2030 | * inform userspace we have processed the request | |
2031 | */ | |
2032 | if (treatment == REG_REQ_ALREADY_SET) { | |
2033 | nl80211_send_reg_change_event(driver_request); | |
25b20dbd | 2034 | reg_update_last_request(driver_request); |
21636c7f | 2035 | reg_set_request_processed(); |
480908a7 | 2036 | return REG_REQ_ALREADY_SET; |
21636c7f LR |
2037 | } |
2038 | ||
d34265a3 | 2039 | if (reg_query_database(driver_request)) { |
25b20dbd | 2040 | reg_update_last_request(driver_request); |
d34265a3 JB |
2041 | return REG_REQ_OK; |
2042 | } | |
25b20dbd | 2043 | |
d34265a3 | 2044 | return REG_REQ_IGNORE; |
21636c7f LR |
2045 | } |
2046 | ||
b23e7a9e LR |
2047 | static enum reg_request_treatment |
2048 | __reg_process_hint_country_ie(struct wiphy *wiphy, | |
2049 | struct regulatory_request *country_ie_request) | |
2050 | { | |
2051 | struct wiphy *last_wiphy = NULL; | |
2052 | struct regulatory_request *lr = get_last_request(); | |
2053 | ||
2054 | if (reg_request_cell_base(lr)) { | |
2055 | /* Trust a Cell base station over the AP's country IE */ | |
2056 | if (regdom_changes(country_ie_request->alpha2)) | |
2057 | return REG_REQ_IGNORE; | |
2058 | return REG_REQ_ALREADY_SET; | |
2a901468 LR |
2059 | } else { |
2060 | if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE) | |
2061 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
2062 | } |
2063 | ||
b23e7a9e LR |
2064 | if (unlikely(!is_an_alpha2(country_ie_request->alpha2))) |
2065 | return -EINVAL; | |
2f1c6c57 LR |
2066 | |
2067 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
2068 | return REG_REQ_OK; | |
2069 | ||
2070 | last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
2071 | ||
2072 | if (last_wiphy != wiphy) { | |
b23e7a9e | 2073 | /* |
2f1c6c57 LR |
2074 | * Two cards with two APs claiming different |
2075 | * Country IE alpha2s. We could | |
2076 | * intersect them, but that seems unlikely | |
2077 | * to be correct. Reject second one for now. | |
b23e7a9e | 2078 | */ |
2f1c6c57 LR |
2079 | if (regdom_changes(country_ie_request->alpha2)) |
2080 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
2081 | return REG_REQ_ALREADY_SET; |
2082 | } | |
70dcec5a EG |
2083 | |
2084 | if (regdom_changes(country_ie_request->alpha2)) | |
2f1c6c57 LR |
2085 | return REG_REQ_OK; |
2086 | return REG_REQ_ALREADY_SET; | |
b23e7a9e LR |
2087 | } |
2088 | ||
d1c96a9a | 2089 | /** |
b23e7a9e LR |
2090 | * reg_process_hint_country_ie - process regulatory requests from country IEs |
2091 | * @country_ie_request: a regulatory request from a country IE | |
d1c96a9a | 2092 | * |
b23e7a9e LR |
2093 | * The wireless subsystem can use this function to process |
2094 | * a regulatory request issued by a country Information Element. | |
d1c96a9a | 2095 | * |
2f92212b | 2096 | * Returns one of the different reg request treatment values. |
d1c96a9a | 2097 | */ |
2f92212b | 2098 | static enum reg_request_treatment |
b23e7a9e LR |
2099 | reg_process_hint_country_ie(struct wiphy *wiphy, |
2100 | struct regulatory_request *country_ie_request) | |
b2e1b302 | 2101 | { |
2f92212b | 2102 | enum reg_request_treatment treatment; |
761cf7ec | 2103 | |
b23e7a9e | 2104 | treatment = __reg_process_hint_country_ie(wiphy, country_ie_request); |
9c96477d | 2105 | |
2f92212b | 2106 | switch (treatment) { |
2f92212b JB |
2107 | case REG_REQ_OK: |
2108 | break; | |
b23e7a9e | 2109 | case REG_REQ_IGNORE: |
d34265a3 | 2110 | return REG_REQ_IGNORE; |
b23e7a9e | 2111 | case REG_REQ_ALREADY_SET: |
c888393b | 2112 | reg_free_request(country_ie_request); |
480908a7 | 2113 | return REG_REQ_ALREADY_SET; |
b23e7a9e | 2114 | case REG_REQ_INTERSECT: |
fb1fc7ad | 2115 | /* |
b23e7a9e LR |
2116 | * This doesn't happen yet, not sure we |
2117 | * ever want to support it for this case. | |
fb1fc7ad | 2118 | */ |
b23e7a9e | 2119 | WARN_ONCE(1, "Unexpected intersection for country IEs"); |
d34265a3 | 2120 | return REG_REQ_IGNORE; |
3e0c3ff3 | 2121 | } |
b2e1b302 | 2122 | |
b23e7a9e LR |
2123 | country_ie_request->intersect = false; |
2124 | country_ie_request->processed = false; | |
5ad6ef5e | 2125 | |
d34265a3 | 2126 | if (reg_query_database(country_ie_request)) { |
25b20dbd | 2127 | reg_update_last_request(country_ie_request); |
d34265a3 JB |
2128 | return REG_REQ_OK; |
2129 | } | |
3e0c3ff3 | 2130 | |
d34265a3 | 2131 | return REG_REQ_IGNORE; |
b2e1b302 LR |
2132 | } |
2133 | ||
30a548c7 | 2134 | /* This processes *all* regulatory hints */ |
1daa37c7 | 2135 | static void reg_process_hint(struct regulatory_request *reg_request) |
fe33eb39 | 2136 | { |
fe33eb39 | 2137 | struct wiphy *wiphy = NULL; |
b3eb7f3f | 2138 | enum reg_request_treatment treatment; |
fe33eb39 | 2139 | |
f4173766 | 2140 | if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) |
fe33eb39 LR |
2141 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
2142 | ||
b3eb7f3f LR |
2143 | switch (reg_request->initiator) { |
2144 | case NL80211_REGDOM_SET_BY_CORE: | |
d34265a3 JB |
2145 | treatment = reg_process_hint_core(reg_request); |
2146 | break; | |
b3eb7f3f | 2147 | case NL80211_REGDOM_SET_BY_USER: |
d34265a3 JB |
2148 | treatment = reg_process_hint_user(reg_request); |
2149 | break; | |
b3eb7f3f | 2150 | case NL80211_REGDOM_SET_BY_DRIVER: |
772f0389 IP |
2151 | if (!wiphy) |
2152 | goto out_free; | |
21636c7f LR |
2153 | treatment = reg_process_hint_driver(wiphy, reg_request); |
2154 | break; | |
b3eb7f3f | 2155 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
772f0389 IP |
2156 | if (!wiphy) |
2157 | goto out_free; | |
b23e7a9e | 2158 | treatment = reg_process_hint_country_ie(wiphy, reg_request); |
b3eb7f3f LR |
2159 | break; |
2160 | default: | |
2161 | WARN(1, "invalid initiator %d\n", reg_request->initiator); | |
772f0389 | 2162 | goto out_free; |
b3eb7f3f LR |
2163 | } |
2164 | ||
d34265a3 JB |
2165 | if (treatment == REG_REQ_IGNORE) |
2166 | goto out_free; | |
2167 | ||
480908a7 JB |
2168 | WARN(treatment != REG_REQ_OK && treatment != REG_REQ_ALREADY_SET, |
2169 | "unexpected treatment value %d\n", treatment); | |
2170 | ||
841b351c JL |
2171 | /* This is required so that the orig_* parameters are saved. |
2172 | * NOTE: treatment must be set for any case that reaches here! | |
2173 | */ | |
b23e7a9e | 2174 | if (treatment == REG_REQ_ALREADY_SET && wiphy && |
ad932f04 | 2175 | wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
b23e7a9e | 2176 | wiphy_update_regulatory(wiphy, reg_request->initiator); |
ad932f04 AN |
2177 | reg_check_channels(); |
2178 | } | |
772f0389 IP |
2179 | |
2180 | return; | |
2181 | ||
2182 | out_free: | |
c888393b | 2183 | reg_free_request(reg_request); |
fe33eb39 LR |
2184 | } |
2185 | ||
ef51fb1d AN |
2186 | static bool reg_only_self_managed_wiphys(void) |
2187 | { | |
2188 | struct cfg80211_registered_device *rdev; | |
2189 | struct wiphy *wiphy; | |
2190 | bool self_managed_found = false; | |
2191 | ||
2192 | ASSERT_RTNL(); | |
2193 | ||
2194 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
2195 | wiphy = &rdev->wiphy; | |
2196 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) | |
2197 | self_managed_found = true; | |
2198 | else | |
2199 | return false; | |
2200 | } | |
2201 | ||
2202 | /* make sure at least one self-managed wiphy exists */ | |
2203 | return self_managed_found; | |
2204 | } | |
2205 | ||
b2e253cf LR |
2206 | /* |
2207 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
2208 | * Regulatory hints come on a first come first serve basis and we | |
2209 | * must process each one atomically. | |
2210 | */ | |
fe33eb39 | 2211 | static void reg_process_pending_hints(void) |
b0e2880b | 2212 | { |
c492db37 | 2213 | struct regulatory_request *reg_request, *lr; |
fe33eb39 | 2214 | |
c492db37 | 2215 | lr = get_last_request(); |
b0e2880b | 2216 | |
b2e253cf | 2217 | /* When last_request->processed becomes true this will be rescheduled */ |
c492db37 | 2218 | if (lr && !lr->processed) { |
96cce12f | 2219 | reg_process_hint(lr); |
5fe231e8 | 2220 | return; |
b2e253cf LR |
2221 | } |
2222 | ||
fe33eb39 | 2223 | spin_lock(®_requests_lock); |
fe33eb39 | 2224 | |
b2e253cf | 2225 | if (list_empty(®_requests_list)) { |
d951c1dd | 2226 | spin_unlock(®_requests_lock); |
5fe231e8 | 2227 | return; |
fe33eb39 | 2228 | } |
b2e253cf LR |
2229 | |
2230 | reg_request = list_first_entry(®_requests_list, | |
2231 | struct regulatory_request, | |
2232 | list); | |
2233 | list_del_init(®_request->list); | |
2234 | ||
fe33eb39 | 2235 | spin_unlock(®_requests_lock); |
b0e2880b | 2236 | |
ef51fb1d AN |
2237 | if (reg_only_self_managed_wiphys()) { |
2238 | reg_free_request(reg_request); | |
2239 | return; | |
2240 | } | |
2241 | ||
1daa37c7 | 2242 | reg_process_hint(reg_request); |
2e54a689 B |
2243 | |
2244 | lr = get_last_request(); | |
2245 | ||
2246 | spin_lock(®_requests_lock); | |
2247 | if (!list_empty(®_requests_list) && lr && lr->processed) | |
2248 | schedule_work(®_work); | |
2249 | spin_unlock(®_requests_lock); | |
fe33eb39 LR |
2250 | } |
2251 | ||
e38f8a7a LR |
2252 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
2253 | static void reg_process_pending_beacon_hints(void) | |
2254 | { | |
79c97e97 | 2255 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
2256 | struct reg_beacon *pending_beacon, *tmp; |
2257 | ||
e38f8a7a LR |
2258 | /* This goes through the _pending_ beacon list */ |
2259 | spin_lock_bh(®_pending_beacons_lock); | |
2260 | ||
e38f8a7a LR |
2261 | list_for_each_entry_safe(pending_beacon, tmp, |
2262 | ®_pending_beacons, list) { | |
e38f8a7a LR |
2263 | list_del_init(&pending_beacon->list); |
2264 | ||
2265 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
2266 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
2267 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
2268 | |
2269 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
2270 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
2271 | } | |
2272 | ||
2273 | spin_unlock_bh(®_pending_beacons_lock); | |
e38f8a7a LR |
2274 | } |
2275 | ||
b0d7aa59 JD |
2276 | static void reg_process_self_managed_hints(void) |
2277 | { | |
2278 | struct cfg80211_registered_device *rdev; | |
2279 | struct wiphy *wiphy; | |
2280 | const struct ieee80211_regdomain *tmp; | |
2281 | const struct ieee80211_regdomain *regd; | |
2282 | enum ieee80211_band band; | |
2283 | struct regulatory_request request = {}; | |
2284 | ||
2285 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
2286 | wiphy = &rdev->wiphy; | |
2287 | ||
2288 | spin_lock(®_requests_lock); | |
2289 | regd = rdev->requested_regd; | |
2290 | rdev->requested_regd = NULL; | |
2291 | spin_unlock(®_requests_lock); | |
2292 | ||
2293 | if (regd == NULL) | |
2294 | continue; | |
2295 | ||
2296 | tmp = get_wiphy_regdom(wiphy); | |
2297 | rcu_assign_pointer(wiphy->regd, regd); | |
2298 | rcu_free_regdom(tmp); | |
2299 | ||
2300 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) | |
2301 | handle_band_custom(wiphy, wiphy->bands[band], regd); | |
2302 | ||
2303 | reg_process_ht_flags(wiphy); | |
2304 | ||
2305 | request.wiphy_idx = get_wiphy_idx(wiphy); | |
2306 | request.alpha2[0] = regd->alpha2[0]; | |
2307 | request.alpha2[1] = regd->alpha2[1]; | |
2308 | request.initiator = NL80211_REGDOM_SET_BY_DRIVER; | |
2309 | ||
2310 | nl80211_send_wiphy_reg_change_event(&request); | |
2311 | } | |
2312 | ||
2313 | reg_check_channels(); | |
2314 | } | |
2315 | ||
fe33eb39 LR |
2316 | static void reg_todo(struct work_struct *work) |
2317 | { | |
5fe231e8 | 2318 | rtnl_lock(); |
fe33eb39 | 2319 | reg_process_pending_hints(); |
e38f8a7a | 2320 | reg_process_pending_beacon_hints(); |
b0d7aa59 | 2321 | reg_process_self_managed_hints(); |
5fe231e8 | 2322 | rtnl_unlock(); |
fe33eb39 LR |
2323 | } |
2324 | ||
fe33eb39 LR |
2325 | static void queue_regulatory_request(struct regulatory_request *request) |
2326 | { | |
d4f2c881 JB |
2327 | request->alpha2[0] = toupper(request->alpha2[0]); |
2328 | request->alpha2[1] = toupper(request->alpha2[1]); | |
c61029c7 | 2329 | |
fe33eb39 LR |
2330 | spin_lock(®_requests_lock); |
2331 | list_add_tail(&request->list, ®_requests_list); | |
2332 | spin_unlock(®_requests_lock); | |
2333 | ||
2334 | schedule_work(®_work); | |
2335 | } | |
2336 | ||
09d989d1 LR |
2337 | /* |
2338 | * Core regulatory hint -- happens during cfg80211_init() | |
2339 | * and when we restore regulatory settings. | |
2340 | */ | |
ba25c141 LR |
2341 | static int regulatory_hint_core(const char *alpha2) |
2342 | { | |
2343 | struct regulatory_request *request; | |
2344 | ||
1a919318 | 2345 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
ba25c141 LR |
2346 | if (!request) |
2347 | return -ENOMEM; | |
2348 | ||
2349 | request->alpha2[0] = alpha2[0]; | |
2350 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2351 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 2352 | |
31e99729 | 2353 | queue_regulatory_request(request); |
5078b2e3 | 2354 | |
fe33eb39 | 2355 | return 0; |
ba25c141 LR |
2356 | } |
2357 | ||
fe33eb39 | 2358 | /* User hints */ |
57b5ce07 LR |
2359 | int regulatory_hint_user(const char *alpha2, |
2360 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 2361 | { |
fe33eb39 LR |
2362 | struct regulatory_request *request; |
2363 | ||
fdc9d7b2 JB |
2364 | if (WARN_ON(!alpha2)) |
2365 | return -EINVAL; | |
b2e1b302 | 2366 | |
fe33eb39 LR |
2367 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
2368 | if (!request) | |
2369 | return -ENOMEM; | |
2370 | ||
f4173766 | 2371 | request->wiphy_idx = WIPHY_IDX_INVALID; |
fe33eb39 LR |
2372 | request->alpha2[0] = alpha2[0]; |
2373 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 2374 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 2375 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 | 2376 | |
c37722bd | 2377 | /* Allow calling CRDA again */ |
b6863036 | 2378 | reset_crda_timeouts(); |
c37722bd | 2379 | |
fe33eb39 LR |
2380 | queue_regulatory_request(request); |
2381 | ||
2382 | return 0; | |
2383 | } | |
2384 | ||
05050753 | 2385 | int regulatory_hint_indoor(bool is_indoor, u32 portid) |
52616f2b | 2386 | { |
05050753 | 2387 | spin_lock(®_indoor_lock); |
52616f2b | 2388 | |
05050753 I |
2389 | /* It is possible that more than one user space process is trying to |
2390 | * configure the indoor setting. To handle such cases, clear the indoor | |
2391 | * setting in case that some process does not think that the device | |
2392 | * is operating in an indoor environment. In addition, if a user space | |
2393 | * process indicates that it is controlling the indoor setting, save its | |
2394 | * portid, i.e., make it the owner. | |
2395 | */ | |
2396 | reg_is_indoor = is_indoor; | |
2397 | if (reg_is_indoor) { | |
2398 | if (!reg_is_indoor_portid) | |
2399 | reg_is_indoor_portid = portid; | |
2400 | } else { | |
2401 | reg_is_indoor_portid = 0; | |
2402 | } | |
52616f2b | 2403 | |
05050753 | 2404 | spin_unlock(®_indoor_lock); |
52616f2b | 2405 | |
05050753 I |
2406 | if (!is_indoor) |
2407 | reg_check_channels(); | |
52616f2b IP |
2408 | |
2409 | return 0; | |
2410 | } | |
2411 | ||
05050753 I |
2412 | void regulatory_netlink_notify(u32 portid) |
2413 | { | |
2414 | spin_lock(®_indoor_lock); | |
2415 | ||
2416 | if (reg_is_indoor_portid != portid) { | |
2417 | spin_unlock(®_indoor_lock); | |
2418 | return; | |
2419 | } | |
2420 | ||
2421 | reg_is_indoor = false; | |
2422 | reg_is_indoor_portid = 0; | |
2423 | ||
2424 | spin_unlock(®_indoor_lock); | |
2425 | ||
2426 | reg_check_channels(); | |
2427 | } | |
2428 | ||
fe33eb39 LR |
2429 | /* Driver hints */ |
2430 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
2431 | { | |
2432 | struct regulatory_request *request; | |
2433 | ||
fdc9d7b2 JB |
2434 | if (WARN_ON(!alpha2 || !wiphy)) |
2435 | return -EINVAL; | |
fe33eb39 | 2436 | |
4f7b9140 LR |
2437 | wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG; |
2438 | ||
fe33eb39 LR |
2439 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
2440 | if (!request) | |
2441 | return -ENOMEM; | |
2442 | ||
2443 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
2444 | ||
fe33eb39 LR |
2445 | request->alpha2[0] = alpha2[0]; |
2446 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2447 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 | 2448 | |
c37722bd | 2449 | /* Allow calling CRDA again */ |
b6863036 | 2450 | reset_crda_timeouts(); |
c37722bd | 2451 | |
fe33eb39 LR |
2452 | queue_regulatory_request(request); |
2453 | ||
2454 | return 0; | |
b2e1b302 LR |
2455 | } |
2456 | EXPORT_SYMBOL(regulatory_hint); | |
2457 | ||
789fd033 LR |
2458 | void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band, |
2459 | const u8 *country_ie, u8 country_ie_len) | |
3f2355cb | 2460 | { |
3f2355cb | 2461 | char alpha2[2]; |
3f2355cb | 2462 | enum environment_cap env = ENVIRON_ANY; |
db2424c5 | 2463 | struct regulatory_request *request = NULL, *lr; |
d335fe63 | 2464 | |
3f2355cb LR |
2465 | /* IE len must be evenly divisible by 2 */ |
2466 | if (country_ie_len & 0x01) | |
db2424c5 | 2467 | return; |
3f2355cb LR |
2468 | |
2469 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
db2424c5 JB |
2470 | return; |
2471 | ||
2472 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
2473 | if (!request) | |
2474 | return; | |
3f2355cb | 2475 | |
3f2355cb LR |
2476 | alpha2[0] = country_ie[0]; |
2477 | alpha2[1] = country_ie[1]; | |
2478 | ||
2479 | if (country_ie[2] == 'I') | |
2480 | env = ENVIRON_INDOOR; | |
2481 | else if (country_ie[2] == 'O') | |
2482 | env = ENVIRON_OUTDOOR; | |
2483 | ||
db2424c5 JB |
2484 | rcu_read_lock(); |
2485 | lr = get_last_request(); | |
2486 | ||
2487 | if (unlikely(!lr)) | |
2488 | goto out; | |
2489 | ||
fb1fc7ad | 2490 | /* |
8b19e6ca | 2491 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc | 2492 | * We leave conflict resolution to the workqueue, where can hold |
5fe231e8 | 2493 | * the RTNL. |
fb1fc7ad | 2494 | */ |
c492db37 JB |
2495 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
2496 | lr->wiphy_idx != WIPHY_IDX_INVALID) | |
4b44c8bc | 2497 | goto out; |
3f2355cb | 2498 | |
fe33eb39 | 2499 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
2500 | request->alpha2[0] = alpha2[0]; |
2501 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2502 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
2503 | request->country_ie_env = env; |
2504 | ||
c37722bd | 2505 | /* Allow calling CRDA again */ |
b6863036 | 2506 | reset_crda_timeouts(); |
c37722bd | 2507 | |
fe33eb39 | 2508 | queue_regulatory_request(request); |
db2424c5 | 2509 | request = NULL; |
3f2355cb | 2510 | out: |
db2424c5 JB |
2511 | kfree(request); |
2512 | rcu_read_unlock(); | |
3f2355cb | 2513 | } |
b2e1b302 | 2514 | |
09d989d1 LR |
2515 | static void restore_alpha2(char *alpha2, bool reset_user) |
2516 | { | |
2517 | /* indicates there is no alpha2 to consider for restoration */ | |
2518 | alpha2[0] = '9'; | |
2519 | alpha2[1] = '7'; | |
2520 | ||
2521 | /* The user setting has precedence over the module parameter */ | |
2522 | if (is_user_regdom_saved()) { | |
2523 | /* Unless we're asked to ignore it and reset it */ | |
2524 | if (reset_user) { | |
1a919318 | 2525 | REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); |
09d989d1 LR |
2526 | user_alpha2[0] = '9'; |
2527 | user_alpha2[1] = '7'; | |
2528 | ||
2529 | /* | |
2530 | * If we're ignoring user settings, we still need to | |
2531 | * check the module parameter to ensure we put things | |
2532 | * back as they were for a full restore. | |
2533 | */ | |
2534 | if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
2535 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
2536 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
2537 | alpha2[0] = ieee80211_regdom[0]; |
2538 | alpha2[1] = ieee80211_regdom[1]; | |
2539 | } | |
2540 | } else { | |
1a919318 JB |
2541 | REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", |
2542 | user_alpha2[0], user_alpha2[1]); | |
09d989d1 LR |
2543 | alpha2[0] = user_alpha2[0]; |
2544 | alpha2[1] = user_alpha2[1]; | |
2545 | } | |
2546 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
2547 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
2548 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
2549 | alpha2[0] = ieee80211_regdom[0]; |
2550 | alpha2[1] = ieee80211_regdom[1]; | |
2551 | } else | |
d91e41b6 | 2552 | REG_DBG_PRINT("Restoring regulatory settings\n"); |
09d989d1 LR |
2553 | } |
2554 | ||
5ce543d1 RM |
2555 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
2556 | { | |
2557 | struct ieee80211_supported_band *sband; | |
2558 | enum ieee80211_band band; | |
2559 | struct ieee80211_channel *chan; | |
2560 | int i; | |
2561 | ||
2562 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
2563 | sband = wiphy->bands[band]; | |
2564 | if (!sband) | |
2565 | continue; | |
2566 | for (i = 0; i < sband->n_channels; i++) { | |
2567 | chan = &sband->channels[i]; | |
2568 | chan->flags = chan->orig_flags; | |
2569 | chan->max_antenna_gain = chan->orig_mag; | |
2570 | chan->max_power = chan->orig_mpwr; | |
899852af | 2571 | chan->beacon_found = false; |
5ce543d1 RM |
2572 | } |
2573 | } | |
2574 | } | |
2575 | ||
09d989d1 LR |
2576 | /* |
2577 | * Restoring regulatory settings involves ingoring any | |
2578 | * possibly stale country IE information and user regulatory | |
2579 | * settings if so desired, this includes any beacon hints | |
2580 | * learned as we could have traveled outside to another country | |
2581 | * after disconnection. To restore regulatory settings we do | |
2582 | * exactly what we did at bootup: | |
2583 | * | |
2584 | * - send a core regulatory hint | |
2585 | * - send a user regulatory hint if applicable | |
2586 | * | |
2587 | * Device drivers that send a regulatory hint for a specific country | |
2588 | * keep their own regulatory domain on wiphy->regd so that does does | |
2589 | * not need to be remembered. | |
2590 | */ | |
2591 | static void restore_regulatory_settings(bool reset_user) | |
2592 | { | |
2593 | char alpha2[2]; | |
cee0bec5 | 2594 | char world_alpha2[2]; |
09d989d1 | 2595 | struct reg_beacon *reg_beacon, *btmp; |
14609555 | 2596 | LIST_HEAD(tmp_reg_req_list); |
5ce543d1 | 2597 | struct cfg80211_registered_device *rdev; |
09d989d1 | 2598 | |
5fe231e8 JB |
2599 | ASSERT_RTNL(); |
2600 | ||
05050753 I |
2601 | /* |
2602 | * Clear the indoor setting in case that it is not controlled by user | |
2603 | * space, as otherwise there is no guarantee that the device is still | |
2604 | * operating in an indoor environment. | |
2605 | */ | |
2606 | spin_lock(®_indoor_lock); | |
2607 | if (reg_is_indoor && !reg_is_indoor_portid) { | |
2608 | reg_is_indoor = false; | |
2609 | reg_check_channels(); | |
2610 | } | |
2611 | spin_unlock(®_indoor_lock); | |
52616f2b | 2612 | |
2d319867 | 2613 | reset_regdomains(true, &world_regdom); |
09d989d1 LR |
2614 | restore_alpha2(alpha2, reset_user); |
2615 | ||
14609555 LR |
2616 | /* |
2617 | * If there's any pending requests we simply | |
2618 | * stash them to a temporary pending queue and | |
2619 | * add then after we've restored regulatory | |
2620 | * settings. | |
2621 | */ | |
2622 | spin_lock(®_requests_lock); | |
eeca9fce | 2623 | list_splice_tail_init(®_requests_list, &tmp_reg_req_list); |
14609555 LR |
2624 | spin_unlock(®_requests_lock); |
2625 | ||
09d989d1 LR |
2626 | /* Clear beacon hints */ |
2627 | spin_lock_bh(®_pending_beacons_lock); | |
fea9bced JB |
2628 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2629 | list_del(®_beacon->list); | |
2630 | kfree(reg_beacon); | |
09d989d1 LR |
2631 | } |
2632 | spin_unlock_bh(®_pending_beacons_lock); | |
2633 | ||
fea9bced JB |
2634 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2635 | list_del(®_beacon->list); | |
2636 | kfree(reg_beacon); | |
09d989d1 LR |
2637 | } |
2638 | ||
2639 | /* First restore to the basic regulatory settings */ | |
379b82f4 JB |
2640 | world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; |
2641 | world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; | |
09d989d1 | 2642 | |
5ce543d1 | 2643 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
b0d7aa59 JD |
2644 | if (rdev->wiphy.regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) |
2645 | continue; | |
a2f73b6c | 2646 | if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG) |
5ce543d1 RM |
2647 | restore_custom_reg_settings(&rdev->wiphy); |
2648 | } | |
2649 | ||
cee0bec5 | 2650 | regulatory_hint_core(world_alpha2); |
09d989d1 LR |
2651 | |
2652 | /* | |
2653 | * This restores the ieee80211_regdom module parameter | |
2654 | * preference or the last user requested regulatory | |
2655 | * settings, user regulatory settings takes precedence. | |
2656 | */ | |
2657 | if (is_an_alpha2(alpha2)) | |
549cc1c5 | 2658 | regulatory_hint_user(alpha2, NL80211_USER_REG_HINT_USER); |
09d989d1 | 2659 | |
14609555 | 2660 | spin_lock(®_requests_lock); |
11cff96c | 2661 | list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); |
14609555 LR |
2662 | spin_unlock(®_requests_lock); |
2663 | ||
14609555 LR |
2664 | REG_DBG_PRINT("Kicking the queue\n"); |
2665 | ||
2666 | schedule_work(®_work); | |
2667 | } | |
09d989d1 LR |
2668 | |
2669 | void regulatory_hint_disconnect(void) | |
2670 | { | |
1a919318 | 2671 | REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); |
09d989d1 LR |
2672 | restore_regulatory_settings(false); |
2673 | } | |
2674 | ||
e38f8a7a LR |
2675 | static bool freq_is_chan_12_13_14(u16 freq) |
2676 | { | |
59eb21a6 BR |
2677 | if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || |
2678 | freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || | |
2679 | freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) | |
e38f8a7a LR |
2680 | return true; |
2681 | return false; | |
2682 | } | |
2683 | ||
3ebfa6e7 LR |
2684 | static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) |
2685 | { | |
2686 | struct reg_beacon *pending_beacon; | |
2687 | ||
2688 | list_for_each_entry(pending_beacon, ®_pending_beacons, list) | |
2689 | if (beacon_chan->center_freq == | |
2690 | pending_beacon->chan.center_freq) | |
2691 | return true; | |
2692 | return false; | |
2693 | } | |
2694 | ||
e38f8a7a LR |
2695 | int regulatory_hint_found_beacon(struct wiphy *wiphy, |
2696 | struct ieee80211_channel *beacon_chan, | |
2697 | gfp_t gfp) | |
2698 | { | |
2699 | struct reg_beacon *reg_beacon; | |
3ebfa6e7 | 2700 | bool processing; |
e38f8a7a | 2701 | |
1a919318 JB |
2702 | if (beacon_chan->beacon_found || |
2703 | beacon_chan->flags & IEEE80211_CHAN_RADAR || | |
e38f8a7a | 2704 | (beacon_chan->band == IEEE80211_BAND_2GHZ && |
1a919318 | 2705 | !freq_is_chan_12_13_14(beacon_chan->center_freq))) |
e38f8a7a LR |
2706 | return 0; |
2707 | ||
3ebfa6e7 LR |
2708 | spin_lock_bh(®_pending_beacons_lock); |
2709 | processing = pending_reg_beacon(beacon_chan); | |
2710 | spin_unlock_bh(®_pending_beacons_lock); | |
2711 | ||
2712 | if (processing) | |
e38f8a7a LR |
2713 | return 0; |
2714 | ||
2715 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
2716 | if (!reg_beacon) | |
2717 | return -ENOMEM; | |
2718 | ||
1a919318 | 2719 | REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", |
4113f751 LR |
2720 | beacon_chan->center_freq, |
2721 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
2722 | wiphy_name(wiphy)); | |
2723 | ||
e38f8a7a | 2724 | memcpy(®_beacon->chan, beacon_chan, |
1a919318 | 2725 | sizeof(struct ieee80211_channel)); |
e38f8a7a LR |
2726 | |
2727 | /* | |
2728 | * Since we can be called from BH or and non-BH context | |
2729 | * we must use spin_lock_bh() | |
2730 | */ | |
2731 | spin_lock_bh(®_pending_beacons_lock); | |
2732 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
2733 | spin_unlock_bh(®_pending_beacons_lock); | |
2734 | ||
2735 | schedule_work(®_work); | |
2736 | ||
2737 | return 0; | |
2738 | } | |
2739 | ||
a3d2eaf0 | 2740 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
2741 | { |
2742 | unsigned int i; | |
a3d2eaf0 JB |
2743 | const struct ieee80211_reg_rule *reg_rule = NULL; |
2744 | const struct ieee80211_freq_range *freq_range = NULL; | |
2745 | const struct ieee80211_power_rule *power_rule = NULL; | |
089027e5 | 2746 | char bw[32], cac_time[32]; |
b2e1b302 | 2747 | |
089027e5 | 2748 | pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n"); |
b2e1b302 LR |
2749 | |
2750 | for (i = 0; i < rd->n_reg_rules; i++) { | |
2751 | reg_rule = &rd->reg_rules[i]; | |
2752 | freq_range = ®_rule->freq_range; | |
2753 | power_rule = ®_rule->power_rule; | |
2754 | ||
b0dfd2ea JD |
2755 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
2756 | snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", | |
2757 | freq_range->max_bandwidth_khz, | |
97524820 JD |
2758 | reg_get_max_bandwidth(rd, reg_rule)); |
2759 | else | |
b0dfd2ea | 2760 | snprintf(bw, sizeof(bw), "%d KHz", |
97524820 JD |
2761 | freq_range->max_bandwidth_khz); |
2762 | ||
089027e5 JD |
2763 | if (reg_rule->flags & NL80211_RRF_DFS) |
2764 | scnprintf(cac_time, sizeof(cac_time), "%u s", | |
2765 | reg_rule->dfs_cac_ms/1000); | |
2766 | else | |
2767 | scnprintf(cac_time, sizeof(cac_time), "N/A"); | |
2768 | ||
2769 | ||
fb1fc7ad LR |
2770 | /* |
2771 | * There may not be documentation for max antenna gain | |
2772 | * in certain regions | |
2773 | */ | |
b2e1b302 | 2774 | if (power_rule->max_antenna_gain) |
089027e5 | 2775 | pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n", |
b2e1b302 LR |
2776 | freq_range->start_freq_khz, |
2777 | freq_range->end_freq_khz, | |
97524820 | 2778 | bw, |
b2e1b302 | 2779 | power_rule->max_antenna_gain, |
089027e5 JD |
2780 | power_rule->max_eirp, |
2781 | cac_time); | |
b2e1b302 | 2782 | else |
089027e5 | 2783 | pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n", |
b2e1b302 LR |
2784 | freq_range->start_freq_khz, |
2785 | freq_range->end_freq_khz, | |
97524820 | 2786 | bw, |
089027e5 JD |
2787 | power_rule->max_eirp, |
2788 | cac_time); | |
b2e1b302 LR |
2789 | } |
2790 | } | |
2791 | ||
4c7d3982 | 2792 | bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region) |
8b60b078 LR |
2793 | { |
2794 | switch (dfs_region) { | |
2795 | case NL80211_DFS_UNSET: | |
2796 | case NL80211_DFS_FCC: | |
2797 | case NL80211_DFS_ETSI: | |
2798 | case NL80211_DFS_JP: | |
2799 | return true; | |
2800 | default: | |
2801 | REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", | |
2802 | dfs_region); | |
2803 | return false; | |
2804 | } | |
2805 | } | |
2806 | ||
a3d2eaf0 | 2807 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2808 | { |
c492db37 | 2809 | struct regulatory_request *lr = get_last_request(); |
b2e1b302 | 2810 | |
3f2355cb | 2811 | if (is_intersected_alpha2(rd->alpha2)) { |
c492db37 | 2812 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
79c97e97 | 2813 | struct cfg80211_registered_device *rdev; |
c492db37 | 2814 | rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); |
79c97e97 | 2815 | if (rdev) { |
e9c0268f | 2816 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
2817 | rdev->country_ie_alpha2[0], |
2818 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 2819 | } else |
e9c0268f | 2820 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 2821 | } else |
e9c0268f | 2822 | pr_info("Current regulatory domain intersected:\n"); |
1a919318 | 2823 | } else if (is_world_regdom(rd->alpha2)) { |
e9c0268f | 2824 | pr_info("World regulatory domain updated:\n"); |
1a919318 | 2825 | } else { |
b2e1b302 | 2826 | if (is_unknown_alpha2(rd->alpha2)) |
e9c0268f | 2827 | pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 | 2828 | else { |
c492db37 | 2829 | if (reg_request_cell_base(lr)) |
1a919318 | 2830 | pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", |
57b5ce07 LR |
2831 | rd->alpha2[0], rd->alpha2[1]); |
2832 | else | |
1a919318 | 2833 | pr_info("Regulatory domain changed to country: %c%c\n", |
57b5ce07 LR |
2834 | rd->alpha2[0], rd->alpha2[1]); |
2835 | } | |
b2e1b302 | 2836 | } |
1a919318 | 2837 | |
3ef121b5 | 2838 | pr_info(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region)); |
b2e1b302 LR |
2839 | print_rd_rules(rd); |
2840 | } | |
2841 | ||
2df78167 | 2842 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2843 | { |
e9c0268f | 2844 | pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
2845 | print_rd_rules(rd); |
2846 | } | |
2847 | ||
3b9e5aca LR |
2848 | static int reg_set_rd_core(const struct ieee80211_regdomain *rd) |
2849 | { | |
2850 | if (!is_world_regdom(rd->alpha2)) | |
2851 | return -EINVAL; | |
2852 | update_world_regdomain(rd); | |
2853 | return 0; | |
2854 | } | |
2855 | ||
84721d44 LR |
2856 | static int reg_set_rd_user(const struct ieee80211_regdomain *rd, |
2857 | struct regulatory_request *user_request) | |
2858 | { | |
2859 | const struct ieee80211_regdomain *intersected_rd = NULL; | |
2860 | ||
84721d44 LR |
2861 | if (!regdom_changes(rd->alpha2)) |
2862 | return -EALREADY; | |
2863 | ||
2864 | if (!is_valid_rd(rd)) { | |
2865 | pr_err("Invalid regulatory domain detected:\n"); | |
2866 | print_regdomain_info(rd); | |
2867 | return -EINVAL; | |
2868 | } | |
2869 | ||
2870 | if (!user_request->intersect) { | |
2871 | reset_regdomains(false, rd); | |
2872 | return 0; | |
2873 | } | |
2874 | ||
2875 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); | |
2876 | if (!intersected_rd) | |
2877 | return -EINVAL; | |
2878 | ||
2879 | kfree(rd); | |
2880 | rd = NULL; | |
2881 | reset_regdomains(false, intersected_rd); | |
2882 | ||
2883 | return 0; | |
2884 | } | |
2885 | ||
f5fe3247 LR |
2886 | static int reg_set_rd_driver(const struct ieee80211_regdomain *rd, |
2887 | struct regulatory_request *driver_request) | |
b2e1b302 | 2888 | { |
e9763c3c | 2889 | const struct ieee80211_regdomain *regd; |
9c96477d | 2890 | const struct ieee80211_regdomain *intersected_rd = NULL; |
f5fe3247 | 2891 | const struct ieee80211_regdomain *tmp; |
806a9e39 | 2892 | struct wiphy *request_wiphy; |
6913b49a | 2893 | |
f5fe3247 | 2894 | if (is_world_regdom(rd->alpha2)) |
b2e1b302 LR |
2895 | return -EINVAL; |
2896 | ||
f5fe3247 LR |
2897 | if (!regdom_changes(rd->alpha2)) |
2898 | return -EALREADY; | |
b2e1b302 | 2899 | |
8375af3b | 2900 | if (!is_valid_rd(rd)) { |
e9c0268f | 2901 | pr_err("Invalid regulatory domain detected:\n"); |
8375af3b LR |
2902 | print_regdomain_info(rd); |
2903 | return -EINVAL; | |
b2e1b302 LR |
2904 | } |
2905 | ||
f5fe3247 | 2906 | request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx); |
922ec58c | 2907 | if (!request_wiphy) |
de3584bd | 2908 | return -ENODEV; |
806a9e39 | 2909 | |
f5fe3247 | 2910 | if (!driver_request->intersect) { |
558f6d32 LR |
2911 | if (request_wiphy->regd) |
2912 | return -EALREADY; | |
3e0c3ff3 | 2913 | |
e9763c3c JB |
2914 | regd = reg_copy_regd(rd); |
2915 | if (IS_ERR(regd)) | |
2916 | return PTR_ERR(regd); | |
3e0c3ff3 | 2917 | |
458f4f9e | 2918 | rcu_assign_pointer(request_wiphy->regd, regd); |
379b82f4 | 2919 | reset_regdomains(false, rd); |
b8295acd LR |
2920 | return 0; |
2921 | } | |
2922 | ||
f5fe3247 LR |
2923 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); |
2924 | if (!intersected_rd) | |
2925 | return -EINVAL; | |
b8295acd | 2926 | |
f5fe3247 LR |
2927 | /* |
2928 | * We can trash what CRDA provided now. | |
2929 | * However if a driver requested this specific regulatory | |
2930 | * domain we keep it for its private use | |
2931 | */ | |
2932 | tmp = get_wiphy_regdom(request_wiphy); | |
2933 | rcu_assign_pointer(request_wiphy->regd, rd); | |
2934 | rcu_free_regdom(tmp); | |
b8295acd | 2935 | |
f5fe3247 | 2936 | rd = NULL; |
b7566fc3 | 2937 | |
f5fe3247 | 2938 | reset_regdomains(false, intersected_rd); |
3e0c3ff3 | 2939 | |
f5fe3247 LR |
2940 | return 0; |
2941 | } | |
2942 | ||
01992406 LR |
2943 | static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd, |
2944 | struct regulatory_request *country_ie_request) | |
f5fe3247 LR |
2945 | { |
2946 | struct wiphy *request_wiphy; | |
b8295acd | 2947 | |
f5fe3247 LR |
2948 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && |
2949 | !is_unknown_alpha2(rd->alpha2)) | |
2950 | return -EINVAL; | |
b8295acd | 2951 | |
f5fe3247 LR |
2952 | /* |
2953 | * Lets only bother proceeding on the same alpha2 if the current | |
2954 | * rd is non static (it means CRDA was present and was used last) | |
2955 | * and the pending request came in from a country IE | |
2956 | */ | |
2957 | ||
2958 | if (!is_valid_rd(rd)) { | |
2959 | pr_err("Invalid regulatory domain detected:\n"); | |
2960 | print_regdomain_info(rd); | |
2961 | return -EINVAL; | |
9c96477d LR |
2962 | } |
2963 | ||
01992406 | 2964 | request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx); |
922ec58c | 2965 | if (!request_wiphy) |
f5fe3247 | 2966 | return -ENODEV; |
b2e1b302 | 2967 | |
01992406 | 2968 | if (country_ie_request->intersect) |
f5fe3247 LR |
2969 | return -EINVAL; |
2970 | ||
2971 | reset_regdomains(false, rd); | |
2972 | return 0; | |
2973 | } | |
b2e1b302 | 2974 | |
fb1fc7ad LR |
2975 | /* |
2976 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2977 | * multiple drivers can be ironed out later. Caller must've already |
458f4f9e | 2978 | * kmalloc'd the rd structure. |
fb1fc7ad | 2979 | */ |
c37722bd I |
2980 | int set_regdom(const struct ieee80211_regdomain *rd, |
2981 | enum ieee80211_regd_source regd_src) | |
b2e1b302 | 2982 | { |
c492db37 | 2983 | struct regulatory_request *lr; |
092008ab | 2984 | bool user_reset = false; |
b2e1b302 LR |
2985 | int r; |
2986 | ||
3b9e5aca LR |
2987 | if (!reg_is_valid_request(rd->alpha2)) { |
2988 | kfree(rd); | |
2989 | return -EINVAL; | |
2990 | } | |
2991 | ||
c37722bd | 2992 | if (regd_src == REGD_SOURCE_CRDA) |
b6863036 | 2993 | reset_crda_timeouts(); |
c37722bd | 2994 | |
c492db37 | 2995 | lr = get_last_request(); |
abc7381b | 2996 | |
b2e1b302 | 2997 | /* Note that this doesn't update the wiphys, this is done below */ |
3b9e5aca LR |
2998 | switch (lr->initiator) { |
2999 | case NL80211_REGDOM_SET_BY_CORE: | |
3000 | r = reg_set_rd_core(rd); | |
3001 | break; | |
3002 | case NL80211_REGDOM_SET_BY_USER: | |
84721d44 | 3003 | r = reg_set_rd_user(rd, lr); |
092008ab | 3004 | user_reset = true; |
84721d44 | 3005 | break; |
3b9e5aca | 3006 | case NL80211_REGDOM_SET_BY_DRIVER: |
f5fe3247 LR |
3007 | r = reg_set_rd_driver(rd, lr); |
3008 | break; | |
3b9e5aca | 3009 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
01992406 | 3010 | r = reg_set_rd_country_ie(rd, lr); |
3b9e5aca LR |
3011 | break; |
3012 | default: | |
3013 | WARN(1, "invalid initiator %d\n", lr->initiator); | |
3014 | return -EINVAL; | |
3015 | } | |
3016 | ||
d2372b31 | 3017 | if (r) { |
092008ab JD |
3018 | switch (r) { |
3019 | case -EALREADY: | |
95908535 | 3020 | reg_set_request_processed(); |
092008ab JD |
3021 | break; |
3022 | default: | |
3023 | /* Back to world regulatory in case of errors */ | |
3024 | restore_regulatory_settings(user_reset); | |
3025 | } | |
95908535 | 3026 | |
d2372b31 | 3027 | kfree(rd); |
38fd2143 | 3028 | return r; |
d2372b31 | 3029 | } |
b2e1b302 | 3030 | |
b2e1b302 | 3031 | /* This would make this whole thing pointless */ |
38fd2143 JB |
3032 | if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) |
3033 | return -EINVAL; | |
b2e1b302 LR |
3034 | |
3035 | /* update all wiphys now with the new established regulatory domain */ | |
c492db37 | 3036 | update_all_wiphy_regulatory(lr->initiator); |
b2e1b302 | 3037 | |
458f4f9e | 3038 | print_regdomain(get_cfg80211_regdom()); |
b2e1b302 | 3039 | |
c492db37 | 3040 | nl80211_send_reg_change_event(lr); |
73d54c9e | 3041 | |
b2e253cf LR |
3042 | reg_set_request_processed(); |
3043 | ||
38fd2143 | 3044 | return 0; |
b2e1b302 LR |
3045 | } |
3046 | ||
2c3e861c AN |
3047 | static int __regulatory_set_wiphy_regd(struct wiphy *wiphy, |
3048 | struct ieee80211_regdomain *rd) | |
b0d7aa59 JD |
3049 | { |
3050 | const struct ieee80211_regdomain *regd; | |
3051 | const struct ieee80211_regdomain *prev_regd; | |
3052 | struct cfg80211_registered_device *rdev; | |
3053 | ||
3054 | if (WARN_ON(!wiphy || !rd)) | |
3055 | return -EINVAL; | |
3056 | ||
3057 | if (WARN(!(wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED), | |
3058 | "wiphy should have REGULATORY_WIPHY_SELF_MANAGED\n")) | |
3059 | return -EPERM; | |
3060 | ||
3061 | if (WARN(!is_valid_rd(rd), "Invalid regulatory domain detected\n")) { | |
3062 | print_regdomain_info(rd); | |
3063 | return -EINVAL; | |
3064 | } | |
3065 | ||
3066 | regd = reg_copy_regd(rd); | |
3067 | if (IS_ERR(regd)) | |
3068 | return PTR_ERR(regd); | |
3069 | ||
3070 | rdev = wiphy_to_rdev(wiphy); | |
3071 | ||
3072 | spin_lock(®_requests_lock); | |
3073 | prev_regd = rdev->requested_regd; | |
3074 | rdev->requested_regd = regd; | |
3075 | spin_unlock(®_requests_lock); | |
3076 | ||
3077 | kfree(prev_regd); | |
2c3e861c AN |
3078 | return 0; |
3079 | } | |
3080 | ||
3081 | int regulatory_set_wiphy_regd(struct wiphy *wiphy, | |
3082 | struct ieee80211_regdomain *rd) | |
3083 | { | |
3084 | int ret = __regulatory_set_wiphy_regd(wiphy, rd); | |
3085 | ||
3086 | if (ret) | |
3087 | return ret; | |
b0d7aa59 JD |
3088 | |
3089 | schedule_work(®_work); | |
3090 | return 0; | |
3091 | } | |
3092 | EXPORT_SYMBOL(regulatory_set_wiphy_regd); | |
3093 | ||
2c3e861c AN |
3094 | int regulatory_set_wiphy_regd_sync_rtnl(struct wiphy *wiphy, |
3095 | struct ieee80211_regdomain *rd) | |
3096 | { | |
3097 | int ret; | |
3098 | ||
3099 | ASSERT_RTNL(); | |
3100 | ||
3101 | ret = __regulatory_set_wiphy_regd(wiphy, rd); | |
3102 | if (ret) | |
3103 | return ret; | |
3104 | ||
3105 | /* process the request immediately */ | |
3106 | reg_process_self_managed_hints(); | |
3107 | return 0; | |
3108 | } | |
3109 | EXPORT_SYMBOL(regulatory_set_wiphy_regd_sync_rtnl); | |
3110 | ||
57b5ce07 LR |
3111 | void wiphy_regulatory_register(struct wiphy *wiphy) |
3112 | { | |
23df0b73 AN |
3113 | struct regulatory_request *lr; |
3114 | ||
b0d7aa59 JD |
3115 | /* self-managed devices ignore external hints */ |
3116 | if (wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) | |
3117 | wiphy->regulatory_flags |= REGULATORY_DISABLE_BEACON_HINTS | | |
3118 | REGULATORY_COUNTRY_IE_IGNORE; | |
3119 | ||
57b5ce07 LR |
3120 | if (!reg_dev_ignore_cell_hint(wiphy)) |
3121 | reg_num_devs_support_basehint++; | |
3122 | ||
23df0b73 AN |
3123 | lr = get_last_request(); |
3124 | wiphy_update_regulatory(wiphy, lr->initiator); | |
57b5ce07 LR |
3125 | } |
3126 | ||
bfead080 | 3127 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 3128 | { |
0ad8acaf | 3129 | struct wiphy *request_wiphy = NULL; |
c492db37 | 3130 | struct regulatory_request *lr; |
761cf7ec | 3131 | |
c492db37 | 3132 | lr = get_last_request(); |
abc7381b | 3133 | |
57b5ce07 LR |
3134 | if (!reg_dev_ignore_cell_hint(wiphy)) |
3135 | reg_num_devs_support_basehint--; | |
3136 | ||
458f4f9e | 3137 | rcu_free_regdom(get_wiphy_regdom(wiphy)); |
34dd886c | 3138 | RCU_INIT_POINTER(wiphy->regd, NULL); |
0ef9ccdd | 3139 | |
c492db37 JB |
3140 | if (lr) |
3141 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
806a9e39 | 3142 | |
0ef9ccdd | 3143 | if (!request_wiphy || request_wiphy != wiphy) |
38fd2143 | 3144 | return; |
0ef9ccdd | 3145 | |
c492db37 JB |
3146 | lr->wiphy_idx = WIPHY_IDX_INVALID; |
3147 | lr->country_ie_env = ENVIRON_ANY; | |
3f2355cb LR |
3148 | } |
3149 | ||
174e0cd2 IP |
3150 | /* |
3151 | * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for | |
3152 | * UNII band definitions | |
3153 | */ | |
3154 | int cfg80211_get_unii(int freq) | |
3155 | { | |
3156 | /* UNII-1 */ | |
3157 | if (freq >= 5150 && freq <= 5250) | |
3158 | return 0; | |
3159 | ||
3160 | /* UNII-2A */ | |
3161 | if (freq > 5250 && freq <= 5350) | |
3162 | return 1; | |
3163 | ||
3164 | /* UNII-2B */ | |
3165 | if (freq > 5350 && freq <= 5470) | |
3166 | return 2; | |
3167 | ||
3168 | /* UNII-2C */ | |
3169 | if (freq > 5470 && freq <= 5725) | |
3170 | return 3; | |
3171 | ||
3172 | /* UNII-3 */ | |
3173 | if (freq > 5725 && freq <= 5825) | |
3174 | return 4; | |
3175 | ||
3176 | return -EINVAL; | |
3177 | } | |
3178 | ||
c8866e55 IP |
3179 | bool regulatory_indoor_allowed(void) |
3180 | { | |
3181 | return reg_is_indoor; | |
3182 | } | |
3183 | ||
2fcc9f73 | 3184 | int __init regulatory_init(void) |
b2e1b302 | 3185 | { |
bcf4f99b | 3186 | int err = 0; |
734366de | 3187 | |
b2e1b302 LR |
3188 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
3189 | if (IS_ERR(reg_pdev)) | |
3190 | return PTR_ERR(reg_pdev); | |
734366de | 3191 | |
fe33eb39 | 3192 | spin_lock_init(®_requests_lock); |
e38f8a7a | 3193 | spin_lock_init(®_pending_beacons_lock); |
05050753 | 3194 | spin_lock_init(®_indoor_lock); |
fe33eb39 | 3195 | |
80007efe LR |
3196 | reg_regdb_size_check(); |
3197 | ||
458f4f9e | 3198 | rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); |
734366de | 3199 | |
09d989d1 LR |
3200 | user_alpha2[0] = '9'; |
3201 | user_alpha2[1] = '7'; | |
3202 | ||
ae9e4b0d | 3203 | /* We always try to get an update for the static regdomain */ |
458f4f9e | 3204 | err = regulatory_hint_core(cfg80211_world_regdom->alpha2); |
ba25c141 | 3205 | if (err) { |
bcf4f99b LR |
3206 | if (err == -ENOMEM) |
3207 | return err; | |
3208 | /* | |
3209 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
3210 | * memory which is handled and propagated appropriately above | |
3211 | * but it can also fail during a netlink_broadcast() or during | |
3212 | * early boot for call_usermodehelper(). For now treat these | |
3213 | * errors as non-fatal. | |
3214 | */ | |
e9c0268f | 3215 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b | 3216 | } |
734366de | 3217 | |
ae9e4b0d LR |
3218 | /* |
3219 | * Finally, if the user set the module parameter treat it | |
3220 | * as a user hint. | |
3221 | */ | |
3222 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
3223 | regulatory_hint_user(ieee80211_regdom, |
3224 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 3225 | |
b2e1b302 LR |
3226 | return 0; |
3227 | } | |
3228 | ||
1a919318 | 3229 | void regulatory_exit(void) |
b2e1b302 | 3230 | { |
fe33eb39 | 3231 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 3232 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
3233 | |
3234 | cancel_work_sync(®_work); | |
b6863036 | 3235 | cancel_crda_timeout_sync(); |
ad932f04 | 3236 | cancel_delayed_work_sync(®_check_chans); |
fe33eb39 | 3237 | |
9027b149 | 3238 | /* Lock to suppress warnings */ |
38fd2143 | 3239 | rtnl_lock(); |
379b82f4 | 3240 | reset_regdomains(true, NULL); |
38fd2143 | 3241 | rtnl_unlock(); |
734366de | 3242 | |
58ebacc6 | 3243 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 3244 | |
b2e1b302 | 3245 | platform_device_unregister(reg_pdev); |
734366de | 3246 | |
fea9bced JB |
3247 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
3248 | list_del(®_beacon->list); | |
3249 | kfree(reg_beacon); | |
e38f8a7a | 3250 | } |
e38f8a7a | 3251 | |
fea9bced JB |
3252 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
3253 | list_del(®_beacon->list); | |
3254 | kfree(reg_beacon); | |
e38f8a7a LR |
3255 | } |
3256 | ||
fea9bced JB |
3257 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
3258 | list_del(®_request->list); | |
3259 | kfree(reg_request); | |
fe33eb39 | 3260 | } |
8318d78a | 3261 | } |