Commit | Line | Data |
---|---|---|
8318d78a JB |
1 | /* |
2 | * Copyright 2002-2005, Instant802 Networks, Inc. | |
3 | * Copyright 2005-2006, Devicescape Software, Inc. | |
4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> | |
3b77d5ec | 5 | * Copyright 2008-2011 Luis R. Rodriguez <mcgrof@qca.qualcomm.com> |
8318d78a | 6 | * |
3b77d5ec LR |
7 | * Permission to use, copy, modify, and/or distribute this software for any |
8 | * purpose with or without fee is hereby granted, provided that the above | |
9 | * copyright notice and this permission notice appear in all copies. | |
10 | * | |
11 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
12 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
13 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
14 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
15 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
16 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
17 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
8318d78a JB |
18 | */ |
19 | ||
3b77d5ec | 20 | |
b2e1b302 LR |
21 | /** |
22 | * DOC: Wireless regulatory infrastructure | |
8318d78a JB |
23 | * |
24 | * The usual implementation is for a driver to read a device EEPROM to | |
25 | * determine which regulatory domain it should be operating under, then | |
26 | * looking up the allowable channels in a driver-local table and finally | |
27 | * registering those channels in the wiphy structure. | |
28 | * | |
b2e1b302 LR |
29 | * Another set of compliance enforcement is for drivers to use their |
30 | * own compliance limits which can be stored on the EEPROM. The host | |
31 | * driver or firmware may ensure these are used. | |
32 | * | |
33 | * In addition to all this we provide an extra layer of regulatory | |
34 | * conformance. For drivers which do not have any regulatory | |
35 | * information CRDA provides the complete regulatory solution. | |
36 | * For others it provides a community effort on further restrictions | |
37 | * to enhance compliance. | |
38 | * | |
39 | * Note: When number of rules --> infinity we will not be able to | |
40 | * index on alpha2 any more, instead we'll probably have to | |
41 | * rely on some SHA1 checksum of the regdomain for example. | |
42 | * | |
8318d78a | 43 | */ |
e9c0268f JP |
44 | |
45 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
46 | ||
8318d78a | 47 | #include <linux/kernel.h> |
bc3b2d7f | 48 | #include <linux/export.h> |
5a0e3ad6 | 49 | #include <linux/slab.h> |
b2e1b302 | 50 | #include <linux/list.h> |
c61029c7 | 51 | #include <linux/ctype.h> |
b2e1b302 LR |
52 | #include <linux/nl80211.h> |
53 | #include <linux/platform_device.h> | |
d9b93842 | 54 | #include <linux/moduleparam.h> |
b2e1b302 | 55 | #include <net/cfg80211.h> |
8318d78a | 56 | #include "core.h" |
b2e1b302 | 57 | #include "reg.h" |
3b377ea9 | 58 | #include "regdb.h" |
73d54c9e | 59 | #include "nl80211.h" |
8318d78a | 60 | |
4113f751 | 61 | #ifdef CONFIG_CFG80211_REG_DEBUG |
12c5ffb5 JP |
62 | #define REG_DBG_PRINT(format, args...) \ |
63 | printk(KERN_DEBUG pr_fmt(format), ##args) | |
4113f751 | 64 | #else |
8271195e | 65 | #define REG_DBG_PRINT(args...) |
4113f751 LR |
66 | #endif |
67 | ||
52616f2b IP |
68 | /** |
69 | * enum reg_request_treatment - regulatory request treatment | |
70 | * | |
71 | * @REG_REQ_OK: continue processing the regulatory request | |
72 | * @REG_REQ_IGNORE: ignore the regulatory request | |
73 | * @REG_REQ_INTERSECT: the regulatory domain resulting from this request should | |
74 | * be intersected with the current one. | |
75 | * @REG_REQ_ALREADY_SET: the regulatory request will not change the current | |
76 | * regulatory settings, and no further processing is required. | |
77 | * @REG_REQ_USER_HINT_HANDLED: a non alpha2 user hint was handled and no | |
78 | * further processing is required, i.e., not need to update last_request | |
79 | * etc. This should be used for user hints that do not provide an alpha2 | |
80 | * but some other type of regulatory hint, i.e., indoor operation. | |
81 | */ | |
2f92212b JB |
82 | enum reg_request_treatment { |
83 | REG_REQ_OK, | |
84 | REG_REQ_IGNORE, | |
85 | REG_REQ_INTERSECT, | |
86 | REG_REQ_ALREADY_SET, | |
52616f2b | 87 | REG_REQ_USER_HINT_HANDLED, |
2f92212b JB |
88 | }; |
89 | ||
a042994d LR |
90 | static struct regulatory_request core_request_world = { |
91 | .initiator = NL80211_REGDOM_SET_BY_CORE, | |
92 | .alpha2[0] = '0', | |
93 | .alpha2[1] = '0', | |
94 | .intersect = false, | |
95 | .processed = true, | |
96 | .country_ie_env = ENVIRON_ANY, | |
97 | }; | |
98 | ||
38fd2143 JB |
99 | /* |
100 | * Receipt of information from last regulatory request, | |
101 | * protected by RTNL (and can be accessed with RCU protection) | |
102 | */ | |
c492db37 JB |
103 | static struct regulatory_request __rcu *last_request = |
104 | (void __rcu *)&core_request_world; | |
734366de | 105 | |
b2e1b302 LR |
106 | /* To trigger userspace events */ |
107 | static struct platform_device *reg_pdev; | |
8318d78a | 108 | |
fb1fc7ad LR |
109 | /* |
110 | * Central wireless core regulatory domains, we only need two, | |
734366de | 111 | * the current one and a world regulatory domain in case we have no |
e8da2bb4 | 112 | * information to give us an alpha2. |
38fd2143 | 113 | * (protected by RTNL, can be read under RCU) |
fb1fc7ad | 114 | */ |
458f4f9e | 115 | const struct ieee80211_regdomain __rcu *cfg80211_regdomain; |
734366de | 116 | |
57b5ce07 LR |
117 | /* |
118 | * Number of devices that registered to the core | |
119 | * that support cellular base station regulatory hints | |
38fd2143 | 120 | * (protected by RTNL) |
57b5ce07 LR |
121 | */ |
122 | static int reg_num_devs_support_basehint; | |
123 | ||
52616f2b IP |
124 | /* |
125 | * State variable indicating if the platform on which the devices | |
126 | * are attached is operating in an indoor environment. The state variable | |
127 | * is relevant for all registered devices. | |
128 | * (protected by RTNL) | |
129 | */ | |
130 | static bool reg_is_indoor; | |
131 | ||
458f4f9e JB |
132 | static const struct ieee80211_regdomain *get_cfg80211_regdom(void) |
133 | { | |
38fd2143 | 134 | return rtnl_dereference(cfg80211_regdomain); |
458f4f9e JB |
135 | } |
136 | ||
137 | static const struct ieee80211_regdomain *get_wiphy_regdom(struct wiphy *wiphy) | |
138 | { | |
38fd2143 | 139 | return rtnl_dereference(wiphy->regd); |
458f4f9e JB |
140 | } |
141 | ||
3ef121b5 LR |
142 | static const char *reg_dfs_region_str(enum nl80211_dfs_regions dfs_region) |
143 | { | |
144 | switch (dfs_region) { | |
145 | case NL80211_DFS_UNSET: | |
146 | return "unset"; | |
147 | case NL80211_DFS_FCC: | |
148 | return "FCC"; | |
149 | case NL80211_DFS_ETSI: | |
150 | return "ETSI"; | |
151 | case NL80211_DFS_JP: | |
152 | return "JP"; | |
153 | } | |
154 | return "Unknown"; | |
155 | } | |
156 | ||
6c474799 LR |
157 | enum nl80211_dfs_regions reg_get_dfs_region(struct wiphy *wiphy) |
158 | { | |
159 | const struct ieee80211_regdomain *regd = NULL; | |
160 | const struct ieee80211_regdomain *wiphy_regd = NULL; | |
161 | ||
162 | regd = get_cfg80211_regdom(); | |
163 | if (!wiphy) | |
164 | goto out; | |
165 | ||
166 | wiphy_regd = get_wiphy_regdom(wiphy); | |
167 | if (!wiphy_regd) | |
168 | goto out; | |
169 | ||
170 | if (wiphy_regd->dfs_region == regd->dfs_region) | |
171 | goto out; | |
172 | ||
173 | REG_DBG_PRINT("%s: device specific dfs_region " | |
174 | "(%s) disagrees with cfg80211's " | |
175 | "central dfs_region (%s)\n", | |
176 | dev_name(&wiphy->dev), | |
177 | reg_dfs_region_str(wiphy_regd->dfs_region), | |
178 | reg_dfs_region_str(regd->dfs_region)); | |
179 | ||
180 | out: | |
181 | return regd->dfs_region; | |
182 | } | |
183 | ||
458f4f9e JB |
184 | static void rcu_free_regdom(const struct ieee80211_regdomain *r) |
185 | { | |
186 | if (!r) | |
187 | return; | |
188 | kfree_rcu((struct ieee80211_regdomain *)r, rcu_head); | |
189 | } | |
190 | ||
c492db37 JB |
191 | static struct regulatory_request *get_last_request(void) |
192 | { | |
38fd2143 | 193 | return rcu_dereference_rtnl(last_request); |
c492db37 JB |
194 | } |
195 | ||
e38f8a7a | 196 | /* Used to queue up regulatory hints */ |
fe33eb39 LR |
197 | static LIST_HEAD(reg_requests_list); |
198 | static spinlock_t reg_requests_lock; | |
199 | ||
e38f8a7a LR |
200 | /* Used to queue up beacon hints for review */ |
201 | static LIST_HEAD(reg_pending_beacons); | |
202 | static spinlock_t reg_pending_beacons_lock; | |
203 | ||
204 | /* Used to keep track of processed beacon hints */ | |
205 | static LIST_HEAD(reg_beacon_list); | |
206 | ||
207 | struct reg_beacon { | |
208 | struct list_head list; | |
209 | struct ieee80211_channel chan; | |
210 | }; | |
211 | ||
f333a7a2 LR |
212 | static void reg_todo(struct work_struct *work); |
213 | static DECLARE_WORK(reg_work, reg_todo); | |
214 | ||
a90c7a31 LR |
215 | static void reg_timeout_work(struct work_struct *work); |
216 | static DECLARE_DELAYED_WORK(reg_timeout, reg_timeout_work); | |
217 | ||
734366de JB |
218 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
219 | static const struct ieee80211_regdomain world_regdom = { | |
90cdc6df | 220 | .n_reg_rules = 6, |
734366de JB |
221 | .alpha2 = "00", |
222 | .reg_rules = { | |
68798a62 LR |
223 | /* IEEE 802.11b/g, channels 1..11 */ |
224 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), | |
43c771a1 JB |
225 | /* IEEE 802.11b/g, channels 12..13. */ |
226 | REG_RULE(2467-10, 2472+10, 40, 6, 20, | |
8fe02e16 | 227 | NL80211_RRF_NO_IR), |
611b6a82 LR |
228 | /* IEEE 802.11 channel 14 - Only JP enables |
229 | * this and for 802.11b only */ | |
230 | REG_RULE(2484-10, 2484+10, 20, 6, 20, | |
8fe02e16 | 231 | NL80211_RRF_NO_IR | |
611b6a82 LR |
232 | NL80211_RRF_NO_OFDM), |
233 | /* IEEE 802.11a, channel 36..48 */ | |
131a19bc | 234 | REG_RULE(5180-10, 5240+10, 160, 6, 20, |
8fe02e16 | 235 | NL80211_RRF_NO_IR), |
3fc71f77 | 236 | |
131a19bc JB |
237 | /* IEEE 802.11a, channel 52..64 - DFS required */ |
238 | REG_RULE(5260-10, 5320+10, 160, 6, 20, | |
8fe02e16 | 239 | NL80211_RRF_NO_IR | |
131a19bc JB |
240 | NL80211_RRF_DFS), |
241 | ||
242 | /* IEEE 802.11a, channel 100..144 - DFS required */ | |
243 | REG_RULE(5500-10, 5720+10, 160, 6, 20, | |
8fe02e16 | 244 | NL80211_RRF_NO_IR | |
131a19bc | 245 | NL80211_RRF_DFS), |
3fc71f77 LR |
246 | |
247 | /* IEEE 802.11a, channel 149..165 */ | |
8ab9d85c | 248 | REG_RULE(5745-10, 5825+10, 80, 6, 20, |
8fe02e16 | 249 | NL80211_RRF_NO_IR), |
90cdc6df VK |
250 | |
251 | /* IEEE 802.11ad (60gHz), channels 1..3 */ | |
252 | REG_RULE(56160+2160*1-1080, 56160+2160*3+1080, 2160, 0, 0, 0), | |
734366de JB |
253 | } |
254 | }; | |
255 | ||
38fd2143 | 256 | /* protected by RTNL */ |
a3d2eaf0 JB |
257 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
258 | &world_regdom; | |
734366de | 259 | |
6ee7d330 | 260 | static char *ieee80211_regdom = "00"; |
09d989d1 | 261 | static char user_alpha2[2]; |
6ee7d330 | 262 | |
734366de JB |
263 | module_param(ieee80211_regdom, charp, 0444); |
264 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); | |
265 | ||
c888393b | 266 | static void reg_free_request(struct regulatory_request *request) |
5ad6ef5e | 267 | { |
c888393b AN |
268 | if (request != get_last_request()) |
269 | kfree(request); | |
270 | } | |
271 | ||
272 | static void reg_free_last_request(void) | |
273 | { | |
274 | struct regulatory_request *lr = get_last_request(); | |
275 | ||
5ad6ef5e LR |
276 | if (lr != &core_request_world && lr) |
277 | kfree_rcu(lr, rcu_head); | |
278 | } | |
279 | ||
05f1a3ea LR |
280 | static void reg_update_last_request(struct regulatory_request *request) |
281 | { | |
255e25b0 LR |
282 | struct regulatory_request *lr; |
283 | ||
284 | lr = get_last_request(); | |
285 | if (lr == request) | |
286 | return; | |
287 | ||
c888393b | 288 | reg_free_last_request(); |
05f1a3ea LR |
289 | rcu_assign_pointer(last_request, request); |
290 | } | |
291 | ||
379b82f4 JB |
292 | static void reset_regdomains(bool full_reset, |
293 | const struct ieee80211_regdomain *new_regdom) | |
734366de | 294 | { |
458f4f9e JB |
295 | const struct ieee80211_regdomain *r; |
296 | ||
38fd2143 | 297 | ASSERT_RTNL(); |
e8da2bb4 | 298 | |
458f4f9e JB |
299 | r = get_cfg80211_regdom(); |
300 | ||
942b25cf | 301 | /* avoid freeing static information or freeing something twice */ |
458f4f9e JB |
302 | if (r == cfg80211_world_regdom) |
303 | r = NULL; | |
942b25cf JB |
304 | if (cfg80211_world_regdom == &world_regdom) |
305 | cfg80211_world_regdom = NULL; | |
458f4f9e JB |
306 | if (r == &world_regdom) |
307 | r = NULL; | |
942b25cf | 308 | |
458f4f9e JB |
309 | rcu_free_regdom(r); |
310 | rcu_free_regdom(cfg80211_world_regdom); | |
734366de | 311 | |
a3d2eaf0 | 312 | cfg80211_world_regdom = &world_regdom; |
458f4f9e | 313 | rcu_assign_pointer(cfg80211_regdomain, new_regdom); |
a042994d LR |
314 | |
315 | if (!full_reset) | |
316 | return; | |
317 | ||
05f1a3ea | 318 | reg_update_last_request(&core_request_world); |
734366de JB |
319 | } |
320 | ||
fb1fc7ad LR |
321 | /* |
322 | * Dynamic world regulatory domain requested by the wireless | |
323 | * core upon initialization | |
324 | */ | |
a3d2eaf0 | 325 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
734366de | 326 | { |
c492db37 | 327 | struct regulatory_request *lr; |
734366de | 328 | |
c492db37 JB |
329 | lr = get_last_request(); |
330 | ||
331 | WARN_ON(!lr); | |
734366de | 332 | |
379b82f4 | 333 | reset_regdomains(false, rd); |
734366de JB |
334 | |
335 | cfg80211_world_regdom = rd; | |
734366de | 336 | } |
734366de | 337 | |
a3d2eaf0 | 338 | bool is_world_regdom(const char *alpha2) |
b2e1b302 LR |
339 | { |
340 | if (!alpha2) | |
341 | return false; | |
1a919318 | 342 | return alpha2[0] == '0' && alpha2[1] == '0'; |
b2e1b302 | 343 | } |
8318d78a | 344 | |
a3d2eaf0 | 345 | static bool is_alpha2_set(const char *alpha2) |
b2e1b302 LR |
346 | { |
347 | if (!alpha2) | |
348 | return false; | |
1a919318 | 349 | return alpha2[0] && alpha2[1]; |
b2e1b302 | 350 | } |
8318d78a | 351 | |
a3d2eaf0 | 352 | static bool is_unknown_alpha2(const char *alpha2) |
b2e1b302 LR |
353 | { |
354 | if (!alpha2) | |
355 | return false; | |
fb1fc7ad LR |
356 | /* |
357 | * Special case where regulatory domain was built by driver | |
358 | * but a specific alpha2 cannot be determined | |
359 | */ | |
1a919318 | 360 | return alpha2[0] == '9' && alpha2[1] == '9'; |
b2e1b302 | 361 | } |
8318d78a | 362 | |
3f2355cb LR |
363 | static bool is_intersected_alpha2(const char *alpha2) |
364 | { | |
365 | if (!alpha2) | |
366 | return false; | |
fb1fc7ad LR |
367 | /* |
368 | * Special case where regulatory domain is the | |
3f2355cb | 369 | * result of an intersection between two regulatory domain |
fb1fc7ad LR |
370 | * structures |
371 | */ | |
1a919318 | 372 | return alpha2[0] == '9' && alpha2[1] == '8'; |
3f2355cb LR |
373 | } |
374 | ||
a3d2eaf0 | 375 | static bool is_an_alpha2(const char *alpha2) |
b2e1b302 LR |
376 | { |
377 | if (!alpha2) | |
378 | return false; | |
1a919318 | 379 | return isalpha(alpha2[0]) && isalpha(alpha2[1]); |
b2e1b302 | 380 | } |
8318d78a | 381 | |
a3d2eaf0 | 382 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
b2e1b302 LR |
383 | { |
384 | if (!alpha2_x || !alpha2_y) | |
385 | return false; | |
1a919318 | 386 | return alpha2_x[0] == alpha2_y[0] && alpha2_x[1] == alpha2_y[1]; |
b2e1b302 LR |
387 | } |
388 | ||
69b1572b | 389 | static bool regdom_changes(const char *alpha2) |
b2e1b302 | 390 | { |
458f4f9e | 391 | const struct ieee80211_regdomain *r = get_cfg80211_regdom(); |
761cf7ec | 392 | |
458f4f9e | 393 | if (!r) |
b2e1b302 | 394 | return true; |
458f4f9e | 395 | return !alpha2_equal(r->alpha2, alpha2); |
b2e1b302 LR |
396 | } |
397 | ||
09d989d1 LR |
398 | /* |
399 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets | |
400 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER | |
401 | * has ever been issued. | |
402 | */ | |
403 | static bool is_user_regdom_saved(void) | |
404 | { | |
405 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') | |
406 | return false; | |
407 | ||
408 | /* This would indicate a mistake on the design */ | |
1a919318 | 409 | if (WARN(!is_world_regdom(user_alpha2) && !is_an_alpha2(user_alpha2), |
09d989d1 | 410 | "Unexpected user alpha2: %c%c\n", |
1a919318 | 411 | user_alpha2[0], user_alpha2[1])) |
09d989d1 LR |
412 | return false; |
413 | ||
414 | return true; | |
415 | } | |
416 | ||
e9763c3c JB |
417 | static const struct ieee80211_regdomain * |
418 | reg_copy_regd(const struct ieee80211_regdomain *src_regd) | |
3b377ea9 JL |
419 | { |
420 | struct ieee80211_regdomain *regd; | |
e9763c3c | 421 | int size_of_regd; |
3b377ea9 JL |
422 | unsigned int i; |
423 | ||
82f20856 JB |
424 | size_of_regd = |
425 | sizeof(struct ieee80211_regdomain) + | |
426 | src_regd->n_reg_rules * sizeof(struct ieee80211_reg_rule); | |
3b377ea9 JL |
427 | |
428 | regd = kzalloc(size_of_regd, GFP_KERNEL); | |
429 | if (!regd) | |
e9763c3c | 430 | return ERR_PTR(-ENOMEM); |
3b377ea9 JL |
431 | |
432 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); | |
433 | ||
434 | for (i = 0; i < src_regd->n_reg_rules; i++) | |
435 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], | |
e9763c3c | 436 | sizeof(struct ieee80211_reg_rule)); |
3b377ea9 | 437 | |
e9763c3c | 438 | return regd; |
3b377ea9 JL |
439 | } |
440 | ||
441 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB | |
442 | struct reg_regdb_search_request { | |
443 | char alpha2[2]; | |
444 | struct list_head list; | |
445 | }; | |
446 | ||
447 | static LIST_HEAD(reg_regdb_search_list); | |
368d06f5 | 448 | static DEFINE_MUTEX(reg_regdb_search_mutex); |
3b377ea9 JL |
449 | |
450 | static void reg_regdb_search(struct work_struct *work) | |
451 | { | |
452 | struct reg_regdb_search_request *request; | |
e9763c3c JB |
453 | const struct ieee80211_regdomain *curdom, *regdom = NULL; |
454 | int i; | |
a85d0d7f | 455 | |
5fe231e8 | 456 | rtnl_lock(); |
3b377ea9 | 457 | |
368d06f5 | 458 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 JL |
459 | while (!list_empty(®_regdb_search_list)) { |
460 | request = list_first_entry(®_regdb_search_list, | |
461 | struct reg_regdb_search_request, | |
462 | list); | |
463 | list_del(&request->list); | |
464 | ||
1a919318 | 465 | for (i = 0; i < reg_regdb_size; i++) { |
3b377ea9 JL |
466 | curdom = reg_regdb[i]; |
467 | ||
1a919318 | 468 | if (alpha2_equal(request->alpha2, curdom->alpha2)) { |
e9763c3c | 469 | regdom = reg_copy_regd(curdom); |
3b377ea9 JL |
470 | break; |
471 | } | |
472 | } | |
473 | ||
474 | kfree(request); | |
475 | } | |
368d06f5 | 476 | mutex_unlock(®_regdb_search_mutex); |
a85d0d7f | 477 | |
e9763c3c | 478 | if (!IS_ERR_OR_NULL(regdom)) |
a85d0d7f LR |
479 | set_regdom(regdom); |
480 | ||
5fe231e8 | 481 | rtnl_unlock(); |
3b377ea9 JL |
482 | } |
483 | ||
484 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); | |
485 | ||
486 | static void reg_regdb_query(const char *alpha2) | |
487 | { | |
488 | struct reg_regdb_search_request *request; | |
489 | ||
490 | if (!alpha2) | |
491 | return; | |
492 | ||
493 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); | |
494 | if (!request) | |
495 | return; | |
496 | ||
497 | memcpy(request->alpha2, alpha2, 2); | |
498 | ||
368d06f5 | 499 | mutex_lock(®_regdb_search_mutex); |
3b377ea9 | 500 | list_add_tail(&request->list, ®_regdb_search_list); |
368d06f5 | 501 | mutex_unlock(®_regdb_search_mutex); |
3b377ea9 JL |
502 | |
503 | schedule_work(®_regdb_work); | |
504 | } | |
80007efe LR |
505 | |
506 | /* Feel free to add any other sanity checks here */ | |
507 | static void reg_regdb_size_check(void) | |
508 | { | |
509 | /* We should ideally BUILD_BUG_ON() but then random builds would fail */ | |
510 | WARN_ONCE(!reg_regdb_size, "db.txt is empty, you should update it..."); | |
511 | } | |
3b377ea9 | 512 | #else |
80007efe | 513 | static inline void reg_regdb_size_check(void) {} |
3b377ea9 JL |
514 | static inline void reg_regdb_query(const char *alpha2) {} |
515 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ | |
516 | ||
fb1fc7ad LR |
517 | /* |
518 | * This lets us keep regulatory code which is updated on a regulatory | |
1226d258 | 519 | * basis in userspace. |
fb1fc7ad | 520 | */ |
b2e1b302 LR |
521 | static int call_crda(const char *alpha2) |
522 | { | |
1226d258 JB |
523 | char country[12]; |
524 | char *env[] = { country, NULL }; | |
525 | ||
526 | snprintf(country, sizeof(country), "COUNTRY=%c%c", | |
527 | alpha2[0], alpha2[1]); | |
528 | ||
b2e1b302 | 529 | if (!is_world_regdom((char *) alpha2)) |
e9c0268f | 530 | pr_info("Calling CRDA for country: %c%c\n", |
b2e1b302 LR |
531 | alpha2[0], alpha2[1]); |
532 | else | |
e9c0268f | 533 | pr_info("Calling CRDA to update world regulatory domain\n"); |
b2e1b302 | 534 | |
3b377ea9 JL |
535 | /* query internal regulatory database (if it exists) */ |
536 | reg_regdb_query(alpha2); | |
537 | ||
1226d258 | 538 | return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, env); |
b2e1b302 LR |
539 | } |
540 | ||
fe6631ff LR |
541 | static enum reg_request_treatment |
542 | reg_call_crda(struct regulatory_request *request) | |
543 | { | |
544 | if (call_crda(request->alpha2)) | |
545 | return REG_REQ_IGNORE; | |
546 | return REG_REQ_OK; | |
547 | } | |
548 | ||
e438768f | 549 | bool reg_is_valid_request(const char *alpha2) |
b2e1b302 | 550 | { |
c492db37 | 551 | struct regulatory_request *lr = get_last_request(); |
61405e97 | 552 | |
c492db37 | 553 | if (!lr || lr->processed) |
f6037d09 JB |
554 | return false; |
555 | ||
c492db37 | 556 | return alpha2_equal(lr->alpha2, alpha2); |
b2e1b302 | 557 | } |
8318d78a | 558 | |
e3961af1 JD |
559 | static const struct ieee80211_regdomain *reg_get_regdomain(struct wiphy *wiphy) |
560 | { | |
561 | struct regulatory_request *lr = get_last_request(); | |
562 | ||
563 | /* | |
564 | * Follow the driver's regulatory domain, if present, unless a country | |
565 | * IE has been processed or a user wants to help complaince further | |
566 | */ | |
567 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
568 | lr->initiator != NL80211_REGDOM_SET_BY_USER && | |
569 | wiphy->regd) | |
570 | return get_wiphy_regdom(wiphy); | |
571 | ||
572 | return get_cfg80211_regdom(); | |
573 | } | |
574 | ||
97524820 JD |
575 | unsigned int reg_get_max_bandwidth(const struct ieee80211_regdomain *rd, |
576 | const struct ieee80211_reg_rule *rule) | |
577 | { | |
578 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; | |
579 | const struct ieee80211_freq_range *freq_range_tmp; | |
580 | const struct ieee80211_reg_rule *tmp; | |
581 | u32 start_freq, end_freq, idx, no; | |
582 | ||
583 | for (idx = 0; idx < rd->n_reg_rules; idx++) | |
584 | if (rule == &rd->reg_rules[idx]) | |
585 | break; | |
586 | ||
587 | if (idx == rd->n_reg_rules) | |
588 | return 0; | |
589 | ||
590 | /* get start_freq */ | |
591 | no = idx; | |
592 | ||
593 | while (no) { | |
594 | tmp = &rd->reg_rules[--no]; | |
595 | freq_range_tmp = &tmp->freq_range; | |
596 | ||
597 | if (freq_range_tmp->end_freq_khz < freq_range->start_freq_khz) | |
598 | break; | |
599 | ||
97524820 JD |
600 | freq_range = freq_range_tmp; |
601 | } | |
602 | ||
603 | start_freq = freq_range->start_freq_khz; | |
604 | ||
605 | /* get end_freq */ | |
606 | freq_range = &rule->freq_range; | |
607 | no = idx; | |
608 | ||
609 | while (no < rd->n_reg_rules - 1) { | |
610 | tmp = &rd->reg_rules[++no]; | |
611 | freq_range_tmp = &tmp->freq_range; | |
612 | ||
613 | if (freq_range_tmp->start_freq_khz > freq_range->end_freq_khz) | |
614 | break; | |
615 | ||
97524820 JD |
616 | freq_range = freq_range_tmp; |
617 | } | |
618 | ||
619 | end_freq = freq_range->end_freq_khz; | |
620 | ||
621 | return end_freq - start_freq; | |
622 | } | |
623 | ||
b2e1b302 | 624 | /* Sanity check on a regulatory rule */ |
a3d2eaf0 | 625 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
8318d78a | 626 | { |
a3d2eaf0 | 627 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
b2e1b302 LR |
628 | u32 freq_diff; |
629 | ||
91e99004 | 630 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
b2e1b302 LR |
631 | return false; |
632 | ||
633 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) | |
634 | return false; | |
635 | ||
636 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; | |
637 | ||
bd05f28e | 638 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
1a919318 | 639 | freq_range->max_bandwidth_khz > freq_diff) |
b2e1b302 LR |
640 | return false; |
641 | ||
642 | return true; | |
643 | } | |
644 | ||
a3d2eaf0 | 645 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
b2e1b302 | 646 | { |
a3d2eaf0 | 647 | const struct ieee80211_reg_rule *reg_rule = NULL; |
b2e1b302 | 648 | unsigned int i; |
8318d78a | 649 | |
b2e1b302 LR |
650 | if (!rd->n_reg_rules) |
651 | return false; | |
8318d78a | 652 | |
88dc1c3f LR |
653 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
654 | return false; | |
655 | ||
b2e1b302 LR |
656 | for (i = 0; i < rd->n_reg_rules; i++) { |
657 | reg_rule = &rd->reg_rules[i]; | |
658 | if (!is_valid_reg_rule(reg_rule)) | |
659 | return false; | |
660 | } | |
661 | ||
662 | return true; | |
8318d78a JB |
663 | } |
664 | ||
038659e7 | 665 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
fe7ef5e9 | 666 | u32 center_freq_khz, u32 bw_khz) |
b2e1b302 | 667 | { |
038659e7 LR |
668 | u32 start_freq_khz, end_freq_khz; |
669 | ||
670 | start_freq_khz = center_freq_khz - (bw_khz/2); | |
671 | end_freq_khz = center_freq_khz + (bw_khz/2); | |
672 | ||
673 | if (start_freq_khz >= freq_range->start_freq_khz && | |
674 | end_freq_khz <= freq_range->end_freq_khz) | |
675 | return true; | |
676 | ||
677 | return false; | |
b2e1b302 | 678 | } |
8318d78a | 679 | |
0c7dc45d LR |
680 | /** |
681 | * freq_in_rule_band - tells us if a frequency is in a frequency band | |
682 | * @freq_range: frequency rule we want to query | |
683 | * @freq_khz: frequency we are inquiring about | |
684 | * | |
685 | * This lets us know if a specific frequency rule is or is not relevant to | |
686 | * a specific frequency's band. Bands are device specific and artificial | |
64629b9d VK |
687 | * definitions (the "2.4 GHz band", the "5 GHz band" and the "60GHz band"), |
688 | * however it is safe for now to assume that a frequency rule should not be | |
689 | * part of a frequency's band if the start freq or end freq are off by more | |
690 | * than 2 GHz for the 2.4 and 5 GHz bands, and by more than 10 GHz for the | |
691 | * 60 GHz band. | |
0c7dc45d LR |
692 | * This resolution can be lowered and should be considered as we add |
693 | * regulatory rule support for other "bands". | |
694 | **/ | |
695 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, | |
1a919318 | 696 | u32 freq_khz) |
0c7dc45d LR |
697 | { |
698 | #define ONE_GHZ_IN_KHZ 1000000 | |
64629b9d VK |
699 | /* |
700 | * From 802.11ad: directional multi-gigabit (DMG): | |
701 | * Pertaining to operation in a frequency band containing a channel | |
702 | * with the Channel starting frequency above 45 GHz. | |
703 | */ | |
704 | u32 limit = freq_khz > 45 * ONE_GHZ_IN_KHZ ? | |
705 | 10 * ONE_GHZ_IN_KHZ : 2 * ONE_GHZ_IN_KHZ; | |
706 | if (abs(freq_khz - freq_range->start_freq_khz) <= limit) | |
0c7dc45d | 707 | return true; |
64629b9d | 708 | if (abs(freq_khz - freq_range->end_freq_khz) <= limit) |
0c7dc45d LR |
709 | return true; |
710 | return false; | |
711 | #undef ONE_GHZ_IN_KHZ | |
712 | } | |
713 | ||
adbfb058 LR |
714 | /* |
715 | * Later on we can perhaps use the more restrictive DFS | |
716 | * region but we don't have information for that yet so | |
717 | * for now simply disallow conflicts. | |
718 | */ | |
719 | static enum nl80211_dfs_regions | |
720 | reg_intersect_dfs_region(const enum nl80211_dfs_regions dfs_region1, | |
721 | const enum nl80211_dfs_regions dfs_region2) | |
722 | { | |
723 | if (dfs_region1 != dfs_region2) | |
724 | return NL80211_DFS_UNSET; | |
725 | return dfs_region1; | |
726 | } | |
727 | ||
fb1fc7ad LR |
728 | /* |
729 | * Helper for regdom_intersect(), this does the real | |
730 | * mathematical intersection fun | |
731 | */ | |
97524820 JD |
732 | static int reg_rules_intersect(const struct ieee80211_regdomain *rd1, |
733 | const struct ieee80211_regdomain *rd2, | |
734 | const struct ieee80211_reg_rule *rule1, | |
1a919318 JB |
735 | const struct ieee80211_reg_rule *rule2, |
736 | struct ieee80211_reg_rule *intersected_rule) | |
9c96477d LR |
737 | { |
738 | const struct ieee80211_freq_range *freq_range1, *freq_range2; | |
739 | struct ieee80211_freq_range *freq_range; | |
740 | const struct ieee80211_power_rule *power_rule1, *power_rule2; | |
741 | struct ieee80211_power_rule *power_rule; | |
97524820 | 742 | u32 freq_diff, max_bandwidth1, max_bandwidth2; |
9c96477d LR |
743 | |
744 | freq_range1 = &rule1->freq_range; | |
745 | freq_range2 = &rule2->freq_range; | |
746 | freq_range = &intersected_rule->freq_range; | |
747 | ||
748 | power_rule1 = &rule1->power_rule; | |
749 | power_rule2 = &rule2->power_rule; | |
750 | power_rule = &intersected_rule->power_rule; | |
751 | ||
752 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, | |
1a919318 | 753 | freq_range2->start_freq_khz); |
9c96477d | 754 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
1a919318 | 755 | freq_range2->end_freq_khz); |
97524820 JD |
756 | |
757 | max_bandwidth1 = freq_range1->max_bandwidth_khz; | |
758 | max_bandwidth2 = freq_range2->max_bandwidth_khz; | |
759 | ||
b0dfd2ea JD |
760 | if (rule1->flags & NL80211_RRF_AUTO_BW) |
761 | max_bandwidth1 = reg_get_max_bandwidth(rd1, rule1); | |
762 | if (rule2->flags & NL80211_RRF_AUTO_BW) | |
763 | max_bandwidth2 = reg_get_max_bandwidth(rd2, rule2); | |
97524820 JD |
764 | |
765 | freq_range->max_bandwidth_khz = min(max_bandwidth1, max_bandwidth2); | |
9c96477d | 766 | |
b0dfd2ea JD |
767 | intersected_rule->flags = rule1->flags | rule2->flags; |
768 | ||
769 | /* | |
770 | * In case NL80211_RRF_AUTO_BW requested for both rules | |
771 | * set AUTO_BW in intersected rule also. Next we will | |
772 | * calculate BW correctly in handle_channel function. | |
773 | * In other case remove AUTO_BW flag while we calculate | |
774 | * maximum bandwidth correctly and auto calculation is | |
775 | * not required. | |
776 | */ | |
777 | if ((rule1->flags & NL80211_RRF_AUTO_BW) && | |
778 | (rule2->flags & NL80211_RRF_AUTO_BW)) | |
779 | intersected_rule->flags |= NL80211_RRF_AUTO_BW; | |
780 | else | |
781 | intersected_rule->flags &= ~NL80211_RRF_AUTO_BW; | |
782 | ||
9c96477d LR |
783 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; |
784 | if (freq_range->max_bandwidth_khz > freq_diff) | |
785 | freq_range->max_bandwidth_khz = freq_diff; | |
786 | ||
787 | power_rule->max_eirp = min(power_rule1->max_eirp, | |
788 | power_rule2->max_eirp); | |
789 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, | |
790 | power_rule2->max_antenna_gain); | |
791 | ||
089027e5 JD |
792 | intersected_rule->dfs_cac_ms = max(rule1->dfs_cac_ms, |
793 | rule2->dfs_cac_ms); | |
794 | ||
9c96477d LR |
795 | if (!is_valid_reg_rule(intersected_rule)) |
796 | return -EINVAL; | |
797 | ||
798 | return 0; | |
799 | } | |
800 | ||
801 | /** | |
802 | * regdom_intersect - do the intersection between two regulatory domains | |
803 | * @rd1: first regulatory domain | |
804 | * @rd2: second regulatory domain | |
805 | * | |
806 | * Use this function to get the intersection between two regulatory domains. | |
807 | * Once completed we will mark the alpha2 for the rd as intersected, "98", | |
808 | * as no one single alpha2 can represent this regulatory domain. | |
809 | * | |
810 | * Returns a pointer to the regulatory domain structure which will hold the | |
811 | * resulting intersection of rules between rd1 and rd2. We will | |
812 | * kzalloc() this structure for you. | |
813 | */ | |
1a919318 JB |
814 | static struct ieee80211_regdomain * |
815 | regdom_intersect(const struct ieee80211_regdomain *rd1, | |
816 | const struct ieee80211_regdomain *rd2) | |
9c96477d LR |
817 | { |
818 | int r, size_of_regd; | |
819 | unsigned int x, y; | |
820 | unsigned int num_rules = 0, rule_idx = 0; | |
821 | const struct ieee80211_reg_rule *rule1, *rule2; | |
822 | struct ieee80211_reg_rule *intersected_rule; | |
823 | struct ieee80211_regdomain *rd; | |
824 | /* This is just a dummy holder to help us count */ | |
74f53cd8 | 825 | struct ieee80211_reg_rule dummy_rule; |
9c96477d LR |
826 | |
827 | if (!rd1 || !rd2) | |
828 | return NULL; | |
829 | ||
fb1fc7ad LR |
830 | /* |
831 | * First we get a count of the rules we'll need, then we actually | |
9c96477d LR |
832 | * build them. This is to so we can malloc() and free() a |
833 | * regdomain once. The reason we use reg_rules_intersect() here | |
834 | * is it will return -EINVAL if the rule computed makes no sense. | |
fb1fc7ad LR |
835 | * All rules that do check out OK are valid. |
836 | */ | |
9c96477d LR |
837 | |
838 | for (x = 0; x < rd1->n_reg_rules; x++) { | |
839 | rule1 = &rd1->reg_rules[x]; | |
840 | for (y = 0; y < rd2->n_reg_rules; y++) { | |
841 | rule2 = &rd2->reg_rules[y]; | |
97524820 JD |
842 | if (!reg_rules_intersect(rd1, rd2, rule1, rule2, |
843 | &dummy_rule)) | |
9c96477d | 844 | num_rules++; |
9c96477d LR |
845 | } |
846 | } | |
847 | ||
848 | if (!num_rules) | |
849 | return NULL; | |
850 | ||
851 | size_of_regd = sizeof(struct ieee80211_regdomain) + | |
82f20856 | 852 | num_rules * sizeof(struct ieee80211_reg_rule); |
9c96477d LR |
853 | |
854 | rd = kzalloc(size_of_regd, GFP_KERNEL); | |
855 | if (!rd) | |
856 | return NULL; | |
857 | ||
8a57fff0 | 858 | for (x = 0; x < rd1->n_reg_rules && rule_idx < num_rules; x++) { |
9c96477d | 859 | rule1 = &rd1->reg_rules[x]; |
8a57fff0 | 860 | for (y = 0; y < rd2->n_reg_rules && rule_idx < num_rules; y++) { |
9c96477d | 861 | rule2 = &rd2->reg_rules[y]; |
fb1fc7ad LR |
862 | /* |
863 | * This time around instead of using the stack lets | |
9c96477d | 864 | * write to the target rule directly saving ourselves |
fb1fc7ad LR |
865 | * a memcpy() |
866 | */ | |
9c96477d | 867 | intersected_rule = &rd->reg_rules[rule_idx]; |
97524820 JD |
868 | r = reg_rules_intersect(rd1, rd2, rule1, rule2, |
869 | intersected_rule); | |
fb1fc7ad LR |
870 | /* |
871 | * No need to memset here the intersected rule here as | |
872 | * we're not using the stack anymore | |
873 | */ | |
9c96477d LR |
874 | if (r) |
875 | continue; | |
876 | rule_idx++; | |
877 | } | |
878 | } | |
879 | ||
880 | if (rule_idx != num_rules) { | |
881 | kfree(rd); | |
882 | return NULL; | |
883 | } | |
884 | ||
885 | rd->n_reg_rules = num_rules; | |
886 | rd->alpha2[0] = '9'; | |
887 | rd->alpha2[1] = '8'; | |
adbfb058 LR |
888 | rd->dfs_region = reg_intersect_dfs_region(rd1->dfs_region, |
889 | rd2->dfs_region); | |
9c96477d LR |
890 | |
891 | return rd; | |
892 | } | |
893 | ||
fb1fc7ad LR |
894 | /* |
895 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may | |
896 | * want to just have the channel structure use these | |
897 | */ | |
b2e1b302 LR |
898 | static u32 map_regdom_flags(u32 rd_flags) |
899 | { | |
900 | u32 channel_flags = 0; | |
8fe02e16 LR |
901 | if (rd_flags & NL80211_RRF_NO_IR_ALL) |
902 | channel_flags |= IEEE80211_CHAN_NO_IR; | |
b2e1b302 LR |
903 | if (rd_flags & NL80211_RRF_DFS) |
904 | channel_flags |= IEEE80211_CHAN_RADAR; | |
03f6b084 SF |
905 | if (rd_flags & NL80211_RRF_NO_OFDM) |
906 | channel_flags |= IEEE80211_CHAN_NO_OFDM; | |
570dbde1 DS |
907 | if (rd_flags & NL80211_RRF_NO_OUTDOOR) |
908 | channel_flags |= IEEE80211_CHAN_INDOOR_ONLY; | |
b2e1b302 LR |
909 | return channel_flags; |
910 | } | |
911 | ||
361c9c8b JB |
912 | static const struct ieee80211_reg_rule * |
913 | freq_reg_info_regd(struct wiphy *wiphy, u32 center_freq, | |
914 | const struct ieee80211_regdomain *regd) | |
8318d78a JB |
915 | { |
916 | int i; | |
0c7dc45d | 917 | bool band_rule_found = false; |
038659e7 LR |
918 | bool bw_fits = false; |
919 | ||
3e0c3ff3 | 920 | if (!regd) |
361c9c8b | 921 | return ERR_PTR(-EINVAL); |
b2e1b302 | 922 | |
3e0c3ff3 | 923 | for (i = 0; i < regd->n_reg_rules; i++) { |
b2e1b302 LR |
924 | const struct ieee80211_reg_rule *rr; |
925 | const struct ieee80211_freq_range *fr = NULL; | |
b2e1b302 | 926 | |
3e0c3ff3 | 927 | rr = ®d->reg_rules[i]; |
b2e1b302 | 928 | fr = &rr->freq_range; |
0c7dc45d | 929 | |
fb1fc7ad LR |
930 | /* |
931 | * We only need to know if one frequency rule was | |
0c7dc45d | 932 | * was in center_freq's band, that's enough, so lets |
fb1fc7ad LR |
933 | * not overwrite it once found |
934 | */ | |
0c7dc45d LR |
935 | if (!band_rule_found) |
936 | band_rule_found = freq_in_rule_band(fr, center_freq); | |
937 | ||
e33e2241 | 938 | bw_fits = reg_does_bw_fit(fr, center_freq, MHZ_TO_KHZ(20)); |
0c7dc45d | 939 | |
361c9c8b JB |
940 | if (band_rule_found && bw_fits) |
941 | return rr; | |
8318d78a JB |
942 | } |
943 | ||
0c7dc45d | 944 | if (!band_rule_found) |
361c9c8b | 945 | return ERR_PTR(-ERANGE); |
0c7dc45d | 946 | |
361c9c8b | 947 | return ERR_PTR(-EINVAL); |
b2e1b302 LR |
948 | } |
949 | ||
361c9c8b JB |
950 | const struct ieee80211_reg_rule *freq_reg_info(struct wiphy *wiphy, |
951 | u32 center_freq) | |
1fa25e41 | 952 | { |
5d885b99 | 953 | const struct ieee80211_regdomain *regd; |
1a919318 | 954 | |
e3961af1 | 955 | regd = reg_get_regdomain(wiphy); |
5d885b99 | 956 | |
361c9c8b | 957 | return freq_reg_info_regd(wiphy, center_freq, regd); |
1fa25e41 | 958 | } |
4f366c5d | 959 | EXPORT_SYMBOL(freq_reg_info); |
b2e1b302 | 960 | |
034c6d6e | 961 | const char *reg_initiator_name(enum nl80211_reg_initiator initiator) |
926a0a09 LR |
962 | { |
963 | switch (initiator) { | |
964 | case NL80211_REGDOM_SET_BY_CORE: | |
034c6d6e | 965 | return "core"; |
926a0a09 | 966 | case NL80211_REGDOM_SET_BY_USER: |
034c6d6e | 967 | return "user"; |
926a0a09 | 968 | case NL80211_REGDOM_SET_BY_DRIVER: |
034c6d6e | 969 | return "driver"; |
926a0a09 | 970 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
034c6d6e | 971 | return "country IE"; |
926a0a09 LR |
972 | default: |
973 | WARN_ON(1); | |
034c6d6e | 974 | return "bug"; |
926a0a09 LR |
975 | } |
976 | } | |
034c6d6e | 977 | EXPORT_SYMBOL(reg_initiator_name); |
e702d3cf | 978 | |
034c6d6e | 979 | #ifdef CONFIG_CFG80211_REG_DEBUG |
b0dfd2ea JD |
980 | static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, |
981 | struct ieee80211_channel *chan, | |
e702d3cf LR |
982 | const struct ieee80211_reg_rule *reg_rule) |
983 | { | |
984 | const struct ieee80211_power_rule *power_rule; | |
985 | const struct ieee80211_freq_range *freq_range; | |
b0dfd2ea | 986 | char max_antenna_gain[32], bw[32]; |
e702d3cf LR |
987 | |
988 | power_rule = ®_rule->power_rule; | |
989 | freq_range = ®_rule->freq_range; | |
990 | ||
991 | if (!power_rule->max_antenna_gain) | |
b0dfd2ea | 992 | snprintf(max_antenna_gain, sizeof(max_antenna_gain), "N/A"); |
e702d3cf | 993 | else |
b0dfd2ea JD |
994 | snprintf(max_antenna_gain, sizeof(max_antenna_gain), "%d", |
995 | power_rule->max_antenna_gain); | |
996 | ||
997 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) | |
998 | snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", | |
999 | freq_range->max_bandwidth_khz, | |
1000 | reg_get_max_bandwidth(regd, reg_rule)); | |
1001 | else | |
1002 | snprintf(bw, sizeof(bw), "%d KHz", | |
1003 | freq_range->max_bandwidth_khz); | |
e702d3cf | 1004 | |
fe7ef5e9 JB |
1005 | REG_DBG_PRINT("Updating information on frequency %d MHz with regulatory rule:\n", |
1006 | chan->center_freq); | |
e702d3cf | 1007 | |
b0dfd2ea | 1008 | REG_DBG_PRINT("%d KHz - %d KHz @ %s), (%s mBi, %d mBm)\n", |
1a919318 | 1009 | freq_range->start_freq_khz, freq_range->end_freq_khz, |
b0dfd2ea | 1010 | bw, max_antenna_gain, |
e702d3cf LR |
1011 | power_rule->max_eirp); |
1012 | } | |
1013 | #else | |
b0dfd2ea JD |
1014 | static void chan_reg_rule_print_dbg(const struct ieee80211_regdomain *regd, |
1015 | struct ieee80211_channel *chan, | |
e702d3cf LR |
1016 | const struct ieee80211_reg_rule *reg_rule) |
1017 | { | |
1018 | return; | |
1019 | } | |
926a0a09 LR |
1020 | #endif |
1021 | ||
e33e2241 JB |
1022 | /* |
1023 | * Note that right now we assume the desired channel bandwidth | |
1024 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz | |
1025 | * per channel, the primary and the extension channel). | |
038659e7 | 1026 | */ |
7ca43d03 LR |
1027 | static void handle_channel(struct wiphy *wiphy, |
1028 | enum nl80211_reg_initiator initiator, | |
fdc9d7b2 | 1029 | struct ieee80211_channel *chan) |
b2e1b302 | 1030 | { |
038659e7 | 1031 | u32 flags, bw_flags = 0; |
b2e1b302 LR |
1032 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1033 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1034 | const struct ieee80211_freq_range *freq_range = NULL; |
fe33eb39 | 1035 | struct wiphy *request_wiphy = NULL; |
c492db37 | 1036 | struct regulatory_request *lr = get_last_request(); |
97524820 JD |
1037 | const struct ieee80211_regdomain *regd; |
1038 | u32 max_bandwidth_khz; | |
a92a3ce7 | 1039 | |
c492db37 | 1040 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); |
a92a3ce7 LR |
1041 | |
1042 | flags = chan->orig_flags; | |
b2e1b302 | 1043 | |
361c9c8b JB |
1044 | reg_rule = freq_reg_info(wiphy, MHZ_TO_KHZ(chan->center_freq)); |
1045 | if (IS_ERR(reg_rule)) { | |
ca4ffe8f LR |
1046 | /* |
1047 | * We will disable all channels that do not match our | |
25985edc | 1048 | * received regulatory rule unless the hint is coming |
ca4ffe8f LR |
1049 | * from a Country IE and the Country IE had no information |
1050 | * about a band. The IEEE 802.11 spec allows for an AP | |
1051 | * to send only a subset of the regulatory rules allowed, | |
1052 | * so an AP in the US that only supports 2.4 GHz may only send | |
1053 | * a country IE with information for the 2.4 GHz band | |
1054 | * while 5 GHz is still supported. | |
1055 | */ | |
1056 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
361c9c8b | 1057 | PTR_ERR(reg_rule) == -ERANGE) |
ca4ffe8f LR |
1058 | return; |
1059 | ||
cc493e4f LR |
1060 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
1061 | request_wiphy && request_wiphy == wiphy && | |
a2f73b6c | 1062 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
cc493e4f LR |
1063 | REG_DBG_PRINT("Disabling freq %d MHz for good\n", |
1064 | chan->center_freq); | |
1065 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; | |
1066 | chan->flags = chan->orig_flags; | |
1067 | } else { | |
1068 | REG_DBG_PRINT("Disabling freq %d MHz\n", | |
1069 | chan->center_freq); | |
1070 | chan->flags |= IEEE80211_CHAN_DISABLED; | |
1071 | } | |
8318d78a | 1072 | return; |
ca4ffe8f | 1073 | } |
8318d78a | 1074 | |
b0dfd2ea JD |
1075 | regd = reg_get_regdomain(wiphy); |
1076 | chan_reg_rule_print_dbg(regd, chan, reg_rule); | |
e702d3cf | 1077 | |
b2e1b302 | 1078 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1079 | freq_range = ®_rule->freq_range; |
1080 | ||
97524820 JD |
1081 | max_bandwidth_khz = freq_range->max_bandwidth_khz; |
1082 | /* Check if auto calculation requested */ | |
b0dfd2ea | 1083 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
97524820 | 1084 | max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); |
97524820 JD |
1085 | |
1086 | if (max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
e33e2241 | 1087 | bw_flags = IEEE80211_CHAN_NO_HT40; |
97524820 | 1088 | if (max_bandwidth_khz < MHZ_TO_KHZ(80)) |
c7a6ee27 | 1089 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; |
97524820 | 1090 | if (max_bandwidth_khz < MHZ_TO_KHZ(160)) |
c7a6ee27 | 1091 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; |
b2e1b302 | 1092 | |
c492db37 | 1093 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
806a9e39 | 1094 | request_wiphy && request_wiphy == wiphy && |
a2f73b6c | 1095 | request_wiphy->regulatory_flags & REGULATORY_STRICT_REG) { |
fb1fc7ad | 1096 | /* |
25985edc | 1097 | * This guarantees the driver's requested regulatory domain |
f976376d | 1098 | * will always be used as a base for further regulatory |
fb1fc7ad LR |
1099 | * settings |
1100 | */ | |
f976376d | 1101 | chan->flags = chan->orig_flags = |
038659e7 | 1102 | map_regdom_flags(reg_rule->flags) | bw_flags; |
f976376d LR |
1103 | chan->max_antenna_gain = chan->orig_mag = |
1104 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); | |
279f0f55 | 1105 | chan->max_reg_power = chan->max_power = chan->orig_mpwr = |
f976376d | 1106 | (int) MBM_TO_DBM(power_rule->max_eirp); |
4f267c11 JD |
1107 | |
1108 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1109 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1110 | if (reg_rule->dfs_cac_ms) | |
1111 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1112 | } | |
1113 | ||
f976376d LR |
1114 | return; |
1115 | } | |
1116 | ||
04f39047 SW |
1117 | chan->dfs_state = NL80211_DFS_USABLE; |
1118 | chan->dfs_state_entered = jiffies; | |
1119 | ||
aa3d7eef | 1120 | chan->beacon_found = false; |
038659e7 | 1121 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
1a919318 JB |
1122 | chan->max_antenna_gain = |
1123 | min_t(int, chan->orig_mag, | |
1124 | MBI_TO_DBI(power_rule->max_antenna_gain)); | |
eccc068e | 1125 | chan->max_reg_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
089027e5 JD |
1126 | |
1127 | if (chan->flags & IEEE80211_CHAN_RADAR) { | |
1128 | if (reg_rule->dfs_cac_ms) | |
1129 | chan->dfs_cac_ms = reg_rule->dfs_cac_ms; | |
1130 | else | |
1131 | chan->dfs_cac_ms = IEEE80211_DFS_MIN_CAC_TIME_MS; | |
1132 | } | |
1133 | ||
5e31fc08 SG |
1134 | if (chan->orig_mpwr) { |
1135 | /* | |
a09a85a0 LR |
1136 | * Devices that use REGULATORY_COUNTRY_IE_FOLLOW_POWER |
1137 | * will always follow the passed country IE power settings. | |
5e31fc08 SG |
1138 | */ |
1139 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a09a85a0 | 1140 | wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_FOLLOW_POWER) |
5e31fc08 SG |
1141 | chan->max_power = chan->max_reg_power; |
1142 | else | |
1143 | chan->max_power = min(chan->orig_mpwr, | |
1144 | chan->max_reg_power); | |
1145 | } else | |
1146 | chan->max_power = chan->max_reg_power; | |
8318d78a JB |
1147 | } |
1148 | ||
7ca43d03 | 1149 | static void handle_band(struct wiphy *wiphy, |
fdc9d7b2 JB |
1150 | enum nl80211_reg_initiator initiator, |
1151 | struct ieee80211_supported_band *sband) | |
8318d78a | 1152 | { |
a92a3ce7 | 1153 | unsigned int i; |
a92a3ce7 | 1154 | |
fdc9d7b2 JB |
1155 | if (!sband) |
1156 | return; | |
8318d78a JB |
1157 | |
1158 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1159 | handle_channel(wiphy, initiator, &sband->channels[i]); |
8318d78a JB |
1160 | } |
1161 | ||
57b5ce07 LR |
1162 | static bool reg_request_cell_base(struct regulatory_request *request) |
1163 | { | |
1164 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1165 | return false; | |
1a919318 | 1166 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_CELL_BASE; |
57b5ce07 LR |
1167 | } |
1168 | ||
52616f2b IP |
1169 | static bool reg_request_indoor(struct regulatory_request *request) |
1170 | { | |
1171 | if (request->initiator != NL80211_REGDOM_SET_BY_USER) | |
1172 | return false; | |
1173 | return request->user_reg_hint_type == NL80211_USER_REG_HINT_INDOOR; | |
1174 | } | |
1175 | ||
57b5ce07 LR |
1176 | bool reg_last_request_cell_base(void) |
1177 | { | |
38fd2143 | 1178 | return reg_request_cell_base(get_last_request()); |
57b5ce07 LR |
1179 | } |
1180 | ||
94fc661f | 1181 | #ifdef CONFIG_CFG80211_REG_CELLULAR_HINTS |
57b5ce07 | 1182 | /* Core specific check */ |
2f92212b JB |
1183 | static enum reg_request_treatment |
1184 | reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
57b5ce07 | 1185 | { |
c492db37 JB |
1186 | struct regulatory_request *lr = get_last_request(); |
1187 | ||
57b5ce07 | 1188 | if (!reg_num_devs_support_basehint) |
2f92212b | 1189 | return REG_REQ_IGNORE; |
57b5ce07 | 1190 | |
c492db37 | 1191 | if (reg_request_cell_base(lr) && |
1a919318 | 1192 | !regdom_changes(pending_request->alpha2)) |
2f92212b | 1193 | return REG_REQ_ALREADY_SET; |
1a919318 | 1194 | |
2f92212b | 1195 | return REG_REQ_OK; |
57b5ce07 LR |
1196 | } |
1197 | ||
1198 | /* Device specific check */ | |
1199 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
1200 | { | |
1a919318 | 1201 | return !(wiphy->features & NL80211_FEATURE_CELL_BASE_REG_HINTS); |
57b5ce07 LR |
1202 | } |
1203 | #else | |
1204 | static int reg_ignore_cell_hint(struct regulatory_request *pending_request) | |
1205 | { | |
2f92212b | 1206 | return REG_REQ_IGNORE; |
57b5ce07 | 1207 | } |
1a919318 JB |
1208 | |
1209 | static bool reg_dev_ignore_cell_hint(struct wiphy *wiphy) | |
57b5ce07 LR |
1210 | { |
1211 | return true; | |
1212 | } | |
1213 | #endif | |
1214 | ||
fa1fb9cb LR |
1215 | static bool wiphy_strict_alpha2_regd(struct wiphy *wiphy) |
1216 | { | |
a2f73b6c LR |
1217 | if (wiphy->regulatory_flags & REGULATORY_STRICT_REG && |
1218 | !(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG)) | |
fa1fb9cb LR |
1219 | return true; |
1220 | return false; | |
1221 | } | |
57b5ce07 | 1222 | |
7db90f4a LR |
1223 | static bool ignore_reg_update(struct wiphy *wiphy, |
1224 | enum nl80211_reg_initiator initiator) | |
14b9815a | 1225 | { |
c492db37 JB |
1226 | struct regulatory_request *lr = get_last_request(); |
1227 | ||
1228 | if (!lr) { | |
034c6d6e LR |
1229 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1230 | "since last_request is not set\n", | |
926a0a09 | 1231 | reg_initiator_name(initiator)); |
14b9815a | 1232 | return true; |
926a0a09 LR |
1233 | } |
1234 | ||
7db90f4a | 1235 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
a2f73b6c | 1236 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { |
034c6d6e LR |
1237 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1238 | "since the driver uses its own custom " | |
1239 | "regulatory domain\n", | |
926a0a09 | 1240 | reg_initiator_name(initiator)); |
14b9815a | 1241 | return true; |
926a0a09 LR |
1242 | } |
1243 | ||
fb1fc7ad LR |
1244 | /* |
1245 | * wiphy->regd will be set once the device has its own | |
1246 | * desired regulatory domain set | |
1247 | */ | |
fa1fb9cb | 1248 | if (wiphy_strict_alpha2_regd(wiphy) && !wiphy->regd && |
749b527b | 1249 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
c492db37 | 1250 | !is_world_regdom(lr->alpha2)) { |
034c6d6e LR |
1251 | REG_DBG_PRINT("Ignoring regulatory request set by %s " |
1252 | "since the driver requires its own regulatory " | |
1253 | "domain to be set first\n", | |
926a0a09 | 1254 | reg_initiator_name(initiator)); |
14b9815a | 1255 | return true; |
926a0a09 LR |
1256 | } |
1257 | ||
c492db37 | 1258 | if (reg_request_cell_base(lr)) |
57b5ce07 LR |
1259 | return reg_dev_ignore_cell_hint(wiphy); |
1260 | ||
14b9815a LR |
1261 | return false; |
1262 | } | |
1263 | ||
3195e489 LR |
1264 | static bool reg_is_world_roaming(struct wiphy *wiphy) |
1265 | { | |
1266 | const struct ieee80211_regdomain *cr = get_cfg80211_regdom(); | |
1267 | const struct ieee80211_regdomain *wr = get_wiphy_regdom(wiphy); | |
1268 | struct regulatory_request *lr = get_last_request(); | |
1269 | ||
1270 | if (is_world_regdom(cr->alpha2) || (wr && is_world_regdom(wr->alpha2))) | |
1271 | return true; | |
1272 | ||
1273 | if (lr && lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && | |
a2f73b6c | 1274 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
3195e489 LR |
1275 | return true; |
1276 | ||
1277 | return false; | |
1278 | } | |
1279 | ||
1a919318 | 1280 | static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx, |
e38f8a7a LR |
1281 | struct reg_beacon *reg_beacon) |
1282 | { | |
e38f8a7a LR |
1283 | struct ieee80211_supported_band *sband; |
1284 | struct ieee80211_channel *chan; | |
6bad8766 LR |
1285 | bool channel_changed = false; |
1286 | struct ieee80211_channel chan_before; | |
e38f8a7a | 1287 | |
e38f8a7a LR |
1288 | sband = wiphy->bands[reg_beacon->chan.band]; |
1289 | chan = &sband->channels[chan_idx]; | |
1290 | ||
1291 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) | |
1292 | return; | |
1293 | ||
6bad8766 LR |
1294 | if (chan->beacon_found) |
1295 | return; | |
1296 | ||
1297 | chan->beacon_found = true; | |
1298 | ||
0f500a5f LR |
1299 | if (!reg_is_world_roaming(wiphy)) |
1300 | return; | |
1301 | ||
a2f73b6c | 1302 | if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS) |
37184244 LR |
1303 | return; |
1304 | ||
6bad8766 LR |
1305 | chan_before.center_freq = chan->center_freq; |
1306 | chan_before.flags = chan->flags; | |
1307 | ||
8fe02e16 LR |
1308 | if (chan->flags & IEEE80211_CHAN_NO_IR) { |
1309 | chan->flags &= ~IEEE80211_CHAN_NO_IR; | |
6bad8766 | 1310 | channel_changed = true; |
e38f8a7a LR |
1311 | } |
1312 | ||
6bad8766 LR |
1313 | if (channel_changed) |
1314 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); | |
e38f8a7a LR |
1315 | } |
1316 | ||
1317 | /* | |
1318 | * Called when a scan on a wiphy finds a beacon on | |
1319 | * new channel | |
1320 | */ | |
1321 | static void wiphy_update_new_beacon(struct wiphy *wiphy, | |
1322 | struct reg_beacon *reg_beacon) | |
1323 | { | |
1324 | unsigned int i; | |
1325 | struct ieee80211_supported_band *sband; | |
1326 | ||
e38f8a7a LR |
1327 | if (!wiphy->bands[reg_beacon->chan.band]) |
1328 | return; | |
1329 | ||
1330 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1331 | ||
1332 | for (i = 0; i < sband->n_channels; i++) | |
1333 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1334 | } | |
1335 | ||
1336 | /* | |
1337 | * Called upon reg changes or a new wiphy is added | |
1338 | */ | |
1339 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) | |
1340 | { | |
1341 | unsigned int i; | |
1342 | struct ieee80211_supported_band *sband; | |
1343 | struct reg_beacon *reg_beacon; | |
1344 | ||
e38f8a7a LR |
1345 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
1346 | if (!wiphy->bands[reg_beacon->chan.band]) | |
1347 | continue; | |
1348 | sband = wiphy->bands[reg_beacon->chan.band]; | |
1349 | for (i = 0; i < sband->n_channels; i++) | |
1350 | handle_reg_beacon(wiphy, i, reg_beacon); | |
1351 | } | |
1352 | } | |
1353 | ||
e38f8a7a LR |
1354 | /* Reap the advantages of previously found beacons */ |
1355 | static void reg_process_beacons(struct wiphy *wiphy) | |
1356 | { | |
b1ed8ddd LR |
1357 | /* |
1358 | * Means we are just firing up cfg80211, so no beacons would | |
1359 | * have been processed yet. | |
1360 | */ | |
1361 | if (!last_request) | |
1362 | return; | |
e38f8a7a LR |
1363 | wiphy_update_beacon_reg(wiphy); |
1364 | } | |
1365 | ||
1a919318 | 1366 | static bool is_ht40_allowed(struct ieee80211_channel *chan) |
038659e7 LR |
1367 | { |
1368 | if (!chan) | |
1a919318 | 1369 | return false; |
038659e7 | 1370 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
1a919318 | 1371 | return false; |
038659e7 | 1372 | /* This would happen when regulatory rules disallow HT40 completely */ |
55b183ad FF |
1373 | if ((chan->flags & IEEE80211_CHAN_NO_HT40) == IEEE80211_CHAN_NO_HT40) |
1374 | return false; | |
1375 | return true; | |
038659e7 LR |
1376 | } |
1377 | ||
1378 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, | |
fdc9d7b2 | 1379 | struct ieee80211_channel *channel) |
038659e7 | 1380 | { |
fdc9d7b2 | 1381 | struct ieee80211_supported_band *sband = wiphy->bands[channel->band]; |
038659e7 LR |
1382 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
1383 | unsigned int i; | |
1384 | ||
1a919318 | 1385 | if (!is_ht40_allowed(channel)) { |
038659e7 LR |
1386 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
1387 | return; | |
1388 | } | |
1389 | ||
1390 | /* | |
1391 | * We need to ensure the extension channels exist to | |
1392 | * be able to use HT40- or HT40+, this finds them (or not) | |
1393 | */ | |
1394 | for (i = 0; i < sband->n_channels; i++) { | |
1395 | struct ieee80211_channel *c = &sband->channels[i]; | |
1a919318 | 1396 | |
038659e7 LR |
1397 | if (c->center_freq == (channel->center_freq - 20)) |
1398 | channel_before = c; | |
1399 | if (c->center_freq == (channel->center_freq + 20)) | |
1400 | channel_after = c; | |
1401 | } | |
1402 | ||
1403 | /* | |
1404 | * Please note that this assumes target bandwidth is 20 MHz, | |
1405 | * if that ever changes we also need to change the below logic | |
1406 | * to include that as well. | |
1407 | */ | |
1a919318 | 1408 | if (!is_ht40_allowed(channel_before)) |
689da1b3 | 1409 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1410 | else |
689da1b3 | 1411 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
038659e7 | 1412 | |
1a919318 | 1413 | if (!is_ht40_allowed(channel_after)) |
689da1b3 | 1414 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 | 1415 | else |
689da1b3 | 1416 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
038659e7 LR |
1417 | } |
1418 | ||
1419 | static void reg_process_ht_flags_band(struct wiphy *wiphy, | |
fdc9d7b2 | 1420 | struct ieee80211_supported_band *sband) |
038659e7 LR |
1421 | { |
1422 | unsigned int i; | |
038659e7 | 1423 | |
fdc9d7b2 JB |
1424 | if (!sband) |
1425 | return; | |
038659e7 LR |
1426 | |
1427 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1428 | reg_process_ht_flags_channel(wiphy, &sband->channels[i]); |
038659e7 LR |
1429 | } |
1430 | ||
1431 | static void reg_process_ht_flags(struct wiphy *wiphy) | |
1432 | { | |
1433 | enum ieee80211_band band; | |
1434 | ||
1435 | if (!wiphy) | |
1436 | return; | |
1437 | ||
fdc9d7b2 JB |
1438 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1439 | reg_process_ht_flags_band(wiphy, wiphy->bands[band]); | |
038659e7 LR |
1440 | } |
1441 | ||
0e3802db LR |
1442 | static void reg_call_notifier(struct wiphy *wiphy, |
1443 | struct regulatory_request *request) | |
1444 | { | |
1445 | if (wiphy->reg_notifier) | |
1446 | wiphy->reg_notifier(wiphy, request); | |
1447 | } | |
1448 | ||
eac03e38 SN |
1449 | static void wiphy_update_regulatory(struct wiphy *wiphy, |
1450 | enum nl80211_reg_initiator initiator) | |
b2e1b302 LR |
1451 | { |
1452 | enum ieee80211_band band; | |
c492db37 | 1453 | struct regulatory_request *lr = get_last_request(); |
eac03e38 | 1454 | |
0e3802db LR |
1455 | if (ignore_reg_update(wiphy, initiator)) { |
1456 | /* | |
1457 | * Regulatory updates set by CORE are ignored for custom | |
1458 | * regulatory cards. Let us notify the changes to the driver, | |
1459 | * as some drivers used this to restore its orig_* reg domain. | |
1460 | */ | |
1461 | if (initiator == NL80211_REGDOM_SET_BY_CORE && | |
a2f73b6c | 1462 | wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) |
0e3802db | 1463 | reg_call_notifier(wiphy, lr); |
a203c2aa | 1464 | return; |
0e3802db | 1465 | } |
a203c2aa | 1466 | |
c492db37 | 1467 | lr->dfs_region = get_cfg80211_regdom()->dfs_region; |
b68e6b3b | 1468 | |
fdc9d7b2 JB |
1469 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) |
1470 | handle_band(wiphy, initiator, wiphy->bands[band]); | |
a203c2aa | 1471 | |
e38f8a7a | 1472 | reg_process_beacons(wiphy); |
038659e7 | 1473 | reg_process_ht_flags(wiphy); |
0e3802db | 1474 | reg_call_notifier(wiphy, lr); |
b2e1b302 LR |
1475 | } |
1476 | ||
d7549cbb SN |
1477 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
1478 | { | |
1479 | struct cfg80211_registered_device *rdev; | |
4a38994f | 1480 | struct wiphy *wiphy; |
d7549cbb | 1481 | |
5fe231e8 | 1482 | ASSERT_RTNL(); |
458f4f9e | 1483 | |
4a38994f RM |
1484 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1485 | wiphy = &rdev->wiphy; | |
1486 | wiphy_update_regulatory(wiphy, initiator); | |
4a38994f | 1487 | } |
d7549cbb SN |
1488 | } |
1489 | ||
1fa25e41 | 1490 | static void handle_channel_custom(struct wiphy *wiphy, |
fdc9d7b2 | 1491 | struct ieee80211_channel *chan, |
1fa25e41 LR |
1492 | const struct ieee80211_regdomain *regd) |
1493 | { | |
038659e7 | 1494 | u32 bw_flags = 0; |
1fa25e41 LR |
1495 | const struct ieee80211_reg_rule *reg_rule = NULL; |
1496 | const struct ieee80211_power_rule *power_rule = NULL; | |
038659e7 | 1497 | const struct ieee80211_freq_range *freq_range = NULL; |
97524820 | 1498 | u32 max_bandwidth_khz; |
ac46d48e | 1499 | |
361c9c8b JB |
1500 | reg_rule = freq_reg_info_regd(wiphy, MHZ_TO_KHZ(chan->center_freq), |
1501 | regd); | |
1fa25e41 | 1502 | |
361c9c8b | 1503 | if (IS_ERR(reg_rule)) { |
fe7ef5e9 JB |
1504 | REG_DBG_PRINT("Disabling freq %d MHz as custom regd has no rule that fits it\n", |
1505 | chan->center_freq); | |
cc493e4f LR |
1506 | chan->orig_flags |= IEEE80211_CHAN_DISABLED; |
1507 | chan->flags = chan->orig_flags; | |
1fa25e41 LR |
1508 | return; |
1509 | } | |
1510 | ||
b0dfd2ea | 1511 | chan_reg_rule_print_dbg(regd, chan, reg_rule); |
e702d3cf | 1512 | |
1fa25e41 | 1513 | power_rule = ®_rule->power_rule; |
038659e7 LR |
1514 | freq_range = ®_rule->freq_range; |
1515 | ||
97524820 JD |
1516 | max_bandwidth_khz = freq_range->max_bandwidth_khz; |
1517 | /* Check if auto calculation requested */ | |
b0dfd2ea | 1518 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
97524820 JD |
1519 | max_bandwidth_khz = reg_get_max_bandwidth(regd, reg_rule); |
1520 | ||
1521 | if (max_bandwidth_khz < MHZ_TO_KHZ(40)) | |
e33e2241 | 1522 | bw_flags = IEEE80211_CHAN_NO_HT40; |
97524820 | 1523 | if (max_bandwidth_khz < MHZ_TO_KHZ(80)) |
c7a6ee27 | 1524 | bw_flags |= IEEE80211_CHAN_NO_80MHZ; |
97524820 | 1525 | if (max_bandwidth_khz < MHZ_TO_KHZ(160)) |
c7a6ee27 | 1526 | bw_flags |= IEEE80211_CHAN_NO_160MHZ; |
1fa25e41 | 1527 | |
038659e7 | 1528 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
1fa25e41 | 1529 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
279f0f55 FF |
1530 | chan->max_reg_power = chan->max_power = |
1531 | (int) MBM_TO_DBM(power_rule->max_eirp); | |
1fa25e41 LR |
1532 | } |
1533 | ||
fdc9d7b2 JB |
1534 | static void handle_band_custom(struct wiphy *wiphy, |
1535 | struct ieee80211_supported_band *sband, | |
1fa25e41 LR |
1536 | const struct ieee80211_regdomain *regd) |
1537 | { | |
1538 | unsigned int i; | |
1fa25e41 | 1539 | |
fdc9d7b2 JB |
1540 | if (!sband) |
1541 | return; | |
1fa25e41 LR |
1542 | |
1543 | for (i = 0; i < sband->n_channels; i++) | |
fdc9d7b2 | 1544 | handle_channel_custom(wiphy, &sband->channels[i], regd); |
1fa25e41 LR |
1545 | } |
1546 | ||
1547 | /* Used by drivers prior to wiphy registration */ | |
1548 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, | |
1549 | const struct ieee80211_regdomain *regd) | |
1550 | { | |
1551 | enum ieee80211_band band; | |
bbcf3f02 | 1552 | unsigned int bands_set = 0; |
ac46d48e | 1553 | |
a2f73b6c LR |
1554 | WARN(!(wiphy->regulatory_flags & REGULATORY_CUSTOM_REG), |
1555 | "wiphy should have REGULATORY_CUSTOM_REG\n"); | |
1556 | wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG; | |
222ea581 | 1557 | |
1fa25e41 | 1558 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
bbcf3f02 LR |
1559 | if (!wiphy->bands[band]) |
1560 | continue; | |
fdc9d7b2 | 1561 | handle_band_custom(wiphy, wiphy->bands[band], regd); |
bbcf3f02 | 1562 | bands_set++; |
b2e1b302 | 1563 | } |
bbcf3f02 LR |
1564 | |
1565 | /* | |
1566 | * no point in calling this if it won't have any effect | |
1a919318 | 1567 | * on your device's supported bands. |
bbcf3f02 LR |
1568 | */ |
1569 | WARN_ON(!bands_set); | |
b2e1b302 | 1570 | } |
1fa25e41 LR |
1571 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
1572 | ||
b2e253cf LR |
1573 | static void reg_set_request_processed(void) |
1574 | { | |
1575 | bool need_more_processing = false; | |
c492db37 | 1576 | struct regulatory_request *lr = get_last_request(); |
b2e253cf | 1577 | |
c492db37 | 1578 | lr->processed = true; |
b2e253cf LR |
1579 | |
1580 | spin_lock(®_requests_lock); | |
1581 | if (!list_empty(®_requests_list)) | |
1582 | need_more_processing = true; | |
1583 | spin_unlock(®_requests_lock); | |
1584 | ||
c492db37 | 1585 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER) |
fe20b39e | 1586 | cancel_delayed_work(®_timeout); |
a90c7a31 | 1587 | |
b2e253cf LR |
1588 | if (need_more_processing) |
1589 | schedule_work(®_work); | |
1590 | } | |
1591 | ||
b3eb7f3f LR |
1592 | /** |
1593 | * reg_process_hint_core - process core regulatory requests | |
1594 | * @pending_request: a pending core regulatory request | |
1595 | * | |
1596 | * The wireless subsystem can use this function to process | |
1597 | * a regulatory request issued by the regulatory core. | |
1598 | * | |
1599 | * Returns one of the different reg request treatment values. | |
1600 | */ | |
1601 | static enum reg_request_treatment | |
1602 | reg_process_hint_core(struct regulatory_request *core_request) | |
1603 | { | |
b3eb7f3f LR |
1604 | |
1605 | core_request->intersect = false; | |
1606 | core_request->processed = false; | |
5ad6ef5e | 1607 | |
05f1a3ea | 1608 | reg_update_last_request(core_request); |
b3eb7f3f | 1609 | |
fe6631ff | 1610 | return reg_call_crda(core_request); |
b3eb7f3f LR |
1611 | } |
1612 | ||
0d97a619 LR |
1613 | static enum reg_request_treatment |
1614 | __reg_process_hint_user(struct regulatory_request *user_request) | |
1615 | { | |
1616 | struct regulatory_request *lr = get_last_request(); | |
1617 | ||
52616f2b IP |
1618 | if (reg_request_indoor(user_request)) { |
1619 | reg_is_indoor = true; | |
1620 | return REG_REQ_USER_HINT_HANDLED; | |
1621 | } | |
1622 | ||
0d97a619 LR |
1623 | if (reg_request_cell_base(user_request)) |
1624 | return reg_ignore_cell_hint(user_request); | |
1625 | ||
1626 | if (reg_request_cell_base(lr)) | |
1627 | return REG_REQ_IGNORE; | |
1628 | ||
1629 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
1630 | return REG_REQ_INTERSECT; | |
1631 | /* | |
1632 | * If the user knows better the user should set the regdom | |
1633 | * to their country before the IE is picked up | |
1634 | */ | |
1635 | if (lr->initiator == NL80211_REGDOM_SET_BY_USER && | |
1636 | lr->intersect) | |
1637 | return REG_REQ_IGNORE; | |
1638 | /* | |
1639 | * Process user requests only after previous user/driver/core | |
1640 | * requests have been processed | |
1641 | */ | |
1642 | if ((lr->initiator == NL80211_REGDOM_SET_BY_CORE || | |
1643 | lr->initiator == NL80211_REGDOM_SET_BY_DRIVER || | |
1644 | lr->initiator == NL80211_REGDOM_SET_BY_USER) && | |
1645 | regdom_changes(lr->alpha2)) | |
1646 | return REG_REQ_IGNORE; | |
1647 | ||
1648 | if (!regdom_changes(user_request->alpha2)) | |
1649 | return REG_REQ_ALREADY_SET; | |
1650 | ||
1651 | return REG_REQ_OK; | |
1652 | } | |
1653 | ||
1654 | /** | |
1655 | * reg_process_hint_user - process user regulatory requests | |
1656 | * @user_request: a pending user regulatory request | |
1657 | * | |
1658 | * The wireless subsystem can use this function to process | |
1659 | * a regulatory request initiated by userspace. | |
1660 | * | |
1661 | * Returns one of the different reg request treatment values. | |
1662 | */ | |
1663 | static enum reg_request_treatment | |
1664 | reg_process_hint_user(struct regulatory_request *user_request) | |
1665 | { | |
1666 | enum reg_request_treatment treatment; | |
0d97a619 LR |
1667 | |
1668 | treatment = __reg_process_hint_user(user_request); | |
1669 | if (treatment == REG_REQ_IGNORE || | |
52616f2b IP |
1670 | treatment == REG_REQ_ALREADY_SET || |
1671 | treatment == REG_REQ_USER_HINT_HANDLED) { | |
c888393b | 1672 | reg_free_request(user_request); |
0d97a619 LR |
1673 | return treatment; |
1674 | } | |
1675 | ||
0d97a619 LR |
1676 | user_request->intersect = treatment == REG_REQ_INTERSECT; |
1677 | user_request->processed = false; | |
5ad6ef5e | 1678 | |
05f1a3ea | 1679 | reg_update_last_request(user_request); |
0d97a619 LR |
1680 | |
1681 | user_alpha2[0] = user_request->alpha2[0]; | |
1682 | user_alpha2[1] = user_request->alpha2[1]; | |
1683 | ||
fe6631ff | 1684 | return reg_call_crda(user_request); |
0d97a619 LR |
1685 | } |
1686 | ||
21636c7f LR |
1687 | static enum reg_request_treatment |
1688 | __reg_process_hint_driver(struct regulatory_request *driver_request) | |
1689 | { | |
1690 | struct regulatory_request *lr = get_last_request(); | |
1691 | ||
1692 | if (lr->initiator == NL80211_REGDOM_SET_BY_CORE) { | |
1693 | if (regdom_changes(driver_request->alpha2)) | |
1694 | return REG_REQ_OK; | |
1695 | return REG_REQ_ALREADY_SET; | |
1696 | } | |
1697 | ||
1698 | /* | |
1699 | * This would happen if you unplug and plug your card | |
1700 | * back in or if you add a new device for which the previously | |
1701 | * loaded card also agrees on the regulatory domain. | |
1702 | */ | |
1703 | if (lr->initiator == NL80211_REGDOM_SET_BY_DRIVER && | |
1704 | !regdom_changes(driver_request->alpha2)) | |
1705 | return REG_REQ_ALREADY_SET; | |
1706 | ||
1707 | return REG_REQ_INTERSECT; | |
1708 | } | |
1709 | ||
1710 | /** | |
1711 | * reg_process_hint_driver - process driver regulatory requests | |
1712 | * @driver_request: a pending driver regulatory request | |
1713 | * | |
1714 | * The wireless subsystem can use this function to process | |
1715 | * a regulatory request issued by an 802.11 driver. | |
1716 | * | |
1717 | * Returns one of the different reg request treatment values. | |
1718 | */ | |
1719 | static enum reg_request_treatment | |
1720 | reg_process_hint_driver(struct wiphy *wiphy, | |
1721 | struct regulatory_request *driver_request) | |
1722 | { | |
1723 | const struct ieee80211_regdomain *regd; | |
1724 | enum reg_request_treatment treatment; | |
21636c7f LR |
1725 | |
1726 | treatment = __reg_process_hint_driver(driver_request); | |
1727 | ||
1728 | switch (treatment) { | |
1729 | case REG_REQ_OK: | |
1730 | break; | |
1731 | case REG_REQ_IGNORE: | |
52616f2b | 1732 | case REG_REQ_USER_HINT_HANDLED: |
c888393b | 1733 | reg_free_request(driver_request); |
21636c7f LR |
1734 | return treatment; |
1735 | case REG_REQ_INTERSECT: | |
1736 | /* fall through */ | |
1737 | case REG_REQ_ALREADY_SET: | |
1738 | regd = reg_copy_regd(get_cfg80211_regdom()); | |
1739 | if (IS_ERR(regd)) { | |
c888393b | 1740 | reg_free_request(driver_request); |
21636c7f LR |
1741 | return REG_REQ_IGNORE; |
1742 | } | |
1743 | rcu_assign_pointer(wiphy->regd, regd); | |
1744 | } | |
1745 | ||
21636c7f LR |
1746 | |
1747 | driver_request->intersect = treatment == REG_REQ_INTERSECT; | |
1748 | driver_request->processed = false; | |
5ad6ef5e | 1749 | |
05f1a3ea | 1750 | reg_update_last_request(driver_request); |
21636c7f LR |
1751 | |
1752 | /* | |
1753 | * Since CRDA will not be called in this case as we already | |
1754 | * have applied the requested regulatory domain before we just | |
1755 | * inform userspace we have processed the request | |
1756 | */ | |
1757 | if (treatment == REG_REQ_ALREADY_SET) { | |
1758 | nl80211_send_reg_change_event(driver_request); | |
1759 | reg_set_request_processed(); | |
1760 | return treatment; | |
1761 | } | |
1762 | ||
fe6631ff | 1763 | return reg_call_crda(driver_request); |
21636c7f LR |
1764 | } |
1765 | ||
b23e7a9e LR |
1766 | static enum reg_request_treatment |
1767 | __reg_process_hint_country_ie(struct wiphy *wiphy, | |
1768 | struct regulatory_request *country_ie_request) | |
1769 | { | |
1770 | struct wiphy *last_wiphy = NULL; | |
1771 | struct regulatory_request *lr = get_last_request(); | |
1772 | ||
1773 | if (reg_request_cell_base(lr)) { | |
1774 | /* Trust a Cell base station over the AP's country IE */ | |
1775 | if (regdom_changes(country_ie_request->alpha2)) | |
1776 | return REG_REQ_IGNORE; | |
1777 | return REG_REQ_ALREADY_SET; | |
2a901468 LR |
1778 | } else { |
1779 | if (wiphy->regulatory_flags & REGULATORY_COUNTRY_IE_IGNORE) | |
1780 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
1781 | } |
1782 | ||
b23e7a9e LR |
1783 | if (unlikely(!is_an_alpha2(country_ie_request->alpha2))) |
1784 | return -EINVAL; | |
2f1c6c57 LR |
1785 | |
1786 | if (lr->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) | |
1787 | return REG_REQ_OK; | |
1788 | ||
1789 | last_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
1790 | ||
1791 | if (last_wiphy != wiphy) { | |
b23e7a9e | 1792 | /* |
2f1c6c57 LR |
1793 | * Two cards with two APs claiming different |
1794 | * Country IE alpha2s. We could | |
1795 | * intersect them, but that seems unlikely | |
1796 | * to be correct. Reject second one for now. | |
b23e7a9e | 1797 | */ |
2f1c6c57 LR |
1798 | if (regdom_changes(country_ie_request->alpha2)) |
1799 | return REG_REQ_IGNORE; | |
b23e7a9e LR |
1800 | return REG_REQ_ALREADY_SET; |
1801 | } | |
2f1c6c57 LR |
1802 | /* |
1803 | * Two consecutive Country IE hints on the same wiphy. | |
1804 | * This should be picked up early by the driver/stack | |
1805 | */ | |
1806 | if (WARN_ON(regdom_changes(country_ie_request->alpha2))) | |
1807 | return REG_REQ_OK; | |
1808 | return REG_REQ_ALREADY_SET; | |
b23e7a9e LR |
1809 | } |
1810 | ||
d1c96a9a | 1811 | /** |
b23e7a9e LR |
1812 | * reg_process_hint_country_ie - process regulatory requests from country IEs |
1813 | * @country_ie_request: a regulatory request from a country IE | |
d1c96a9a | 1814 | * |
b23e7a9e LR |
1815 | * The wireless subsystem can use this function to process |
1816 | * a regulatory request issued by a country Information Element. | |
d1c96a9a | 1817 | * |
2f92212b | 1818 | * Returns one of the different reg request treatment values. |
d1c96a9a | 1819 | */ |
2f92212b | 1820 | static enum reg_request_treatment |
b23e7a9e LR |
1821 | reg_process_hint_country_ie(struct wiphy *wiphy, |
1822 | struct regulatory_request *country_ie_request) | |
b2e1b302 | 1823 | { |
2f92212b | 1824 | enum reg_request_treatment treatment; |
761cf7ec | 1825 | |
b23e7a9e | 1826 | treatment = __reg_process_hint_country_ie(wiphy, country_ie_request); |
9c96477d | 1827 | |
2f92212b | 1828 | switch (treatment) { |
2f92212b JB |
1829 | case REG_REQ_OK: |
1830 | break; | |
b23e7a9e | 1831 | case REG_REQ_IGNORE: |
52616f2b | 1832 | case REG_REQ_USER_HINT_HANDLED: |
b23e7a9e LR |
1833 | /* fall through */ |
1834 | case REG_REQ_ALREADY_SET: | |
c888393b | 1835 | reg_free_request(country_ie_request); |
b23e7a9e LR |
1836 | return treatment; |
1837 | case REG_REQ_INTERSECT: | |
c888393b | 1838 | reg_free_request(country_ie_request); |
fb1fc7ad | 1839 | /* |
b23e7a9e LR |
1840 | * This doesn't happen yet, not sure we |
1841 | * ever want to support it for this case. | |
fb1fc7ad | 1842 | */ |
b23e7a9e LR |
1843 | WARN_ONCE(1, "Unexpected intersection for country IEs"); |
1844 | return REG_REQ_IGNORE; | |
3e0c3ff3 | 1845 | } |
b2e1b302 | 1846 | |
b23e7a9e LR |
1847 | country_ie_request->intersect = false; |
1848 | country_ie_request->processed = false; | |
5ad6ef5e | 1849 | |
05f1a3ea | 1850 | reg_update_last_request(country_ie_request); |
3e0c3ff3 | 1851 | |
fe6631ff | 1852 | return reg_call_crda(country_ie_request); |
b2e1b302 LR |
1853 | } |
1854 | ||
30a548c7 | 1855 | /* This processes *all* regulatory hints */ |
1daa37c7 | 1856 | static void reg_process_hint(struct regulatory_request *reg_request) |
fe33eb39 | 1857 | { |
fe33eb39 | 1858 | struct wiphy *wiphy = NULL; |
b3eb7f3f | 1859 | enum reg_request_treatment treatment; |
fe33eb39 | 1860 | |
f4173766 | 1861 | if (reg_request->wiphy_idx != WIPHY_IDX_INVALID) |
fe33eb39 LR |
1862 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
1863 | ||
b3eb7f3f LR |
1864 | switch (reg_request->initiator) { |
1865 | case NL80211_REGDOM_SET_BY_CORE: | |
1866 | reg_process_hint_core(reg_request); | |
1867 | return; | |
1868 | case NL80211_REGDOM_SET_BY_USER: | |
0d97a619 | 1869 | treatment = reg_process_hint_user(reg_request); |
50c11eb9 | 1870 | if (treatment == REG_REQ_IGNORE || |
4d3df547 AN |
1871 | treatment == REG_REQ_ALREADY_SET || |
1872 | treatment == REG_REQ_USER_HINT_HANDLED) | |
0d97a619 | 1873 | return; |
845f3351 SD |
1874 | queue_delayed_work(system_power_efficient_wq, |
1875 | ®_timeout, msecs_to_jiffies(3142)); | |
0d97a619 | 1876 | return; |
b3eb7f3f | 1877 | case NL80211_REGDOM_SET_BY_DRIVER: |
772f0389 IP |
1878 | if (!wiphy) |
1879 | goto out_free; | |
21636c7f LR |
1880 | treatment = reg_process_hint_driver(wiphy, reg_request); |
1881 | break; | |
b3eb7f3f | 1882 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
772f0389 IP |
1883 | if (!wiphy) |
1884 | goto out_free; | |
b23e7a9e | 1885 | treatment = reg_process_hint_country_ie(wiphy, reg_request); |
b3eb7f3f LR |
1886 | break; |
1887 | default: | |
1888 | WARN(1, "invalid initiator %d\n", reg_request->initiator); | |
772f0389 | 1889 | goto out_free; |
b3eb7f3f LR |
1890 | } |
1891 | ||
b23e7a9e LR |
1892 | /* This is required so that the orig_* parameters are saved */ |
1893 | if (treatment == REG_REQ_ALREADY_SET && wiphy && | |
a2f73b6c | 1894 | wiphy->regulatory_flags & REGULATORY_STRICT_REG) |
b23e7a9e | 1895 | wiphy_update_regulatory(wiphy, reg_request->initiator); |
772f0389 IP |
1896 | |
1897 | return; | |
1898 | ||
1899 | out_free: | |
c888393b | 1900 | reg_free_request(reg_request); |
fe33eb39 LR |
1901 | } |
1902 | ||
b2e253cf LR |
1903 | /* |
1904 | * Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* | |
1905 | * Regulatory hints come on a first come first serve basis and we | |
1906 | * must process each one atomically. | |
1907 | */ | |
fe33eb39 | 1908 | static void reg_process_pending_hints(void) |
b0e2880b | 1909 | { |
c492db37 | 1910 | struct regulatory_request *reg_request, *lr; |
fe33eb39 | 1911 | |
c492db37 | 1912 | lr = get_last_request(); |
b0e2880b | 1913 | |
b2e253cf | 1914 | /* When last_request->processed becomes true this will be rescheduled */ |
c492db37 | 1915 | if (lr && !lr->processed) { |
96cce12f | 1916 | reg_process_hint(lr); |
5fe231e8 | 1917 | return; |
b2e253cf LR |
1918 | } |
1919 | ||
fe33eb39 | 1920 | spin_lock(®_requests_lock); |
fe33eb39 | 1921 | |
b2e253cf | 1922 | if (list_empty(®_requests_list)) { |
d951c1dd | 1923 | spin_unlock(®_requests_lock); |
5fe231e8 | 1924 | return; |
fe33eb39 | 1925 | } |
b2e253cf LR |
1926 | |
1927 | reg_request = list_first_entry(®_requests_list, | |
1928 | struct regulatory_request, | |
1929 | list); | |
1930 | list_del_init(®_request->list); | |
1931 | ||
fe33eb39 | 1932 | spin_unlock(®_requests_lock); |
b0e2880b | 1933 | |
1daa37c7 | 1934 | reg_process_hint(reg_request); |
fe33eb39 LR |
1935 | } |
1936 | ||
e38f8a7a LR |
1937 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
1938 | static void reg_process_pending_beacon_hints(void) | |
1939 | { | |
79c97e97 | 1940 | struct cfg80211_registered_device *rdev; |
e38f8a7a LR |
1941 | struct reg_beacon *pending_beacon, *tmp; |
1942 | ||
e38f8a7a LR |
1943 | /* This goes through the _pending_ beacon list */ |
1944 | spin_lock_bh(®_pending_beacons_lock); | |
1945 | ||
e38f8a7a LR |
1946 | list_for_each_entry_safe(pending_beacon, tmp, |
1947 | ®_pending_beacons, list) { | |
e38f8a7a LR |
1948 | list_del_init(&pending_beacon->list); |
1949 | ||
1950 | /* Applies the beacon hint to current wiphys */ | |
79c97e97 JB |
1951 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
1952 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); | |
e38f8a7a LR |
1953 | |
1954 | /* Remembers the beacon hint for new wiphys or reg changes */ | |
1955 | list_add_tail(&pending_beacon->list, ®_beacon_list); | |
1956 | } | |
1957 | ||
1958 | spin_unlock_bh(®_pending_beacons_lock); | |
e38f8a7a LR |
1959 | } |
1960 | ||
fe33eb39 LR |
1961 | static void reg_todo(struct work_struct *work) |
1962 | { | |
5fe231e8 | 1963 | rtnl_lock(); |
fe33eb39 | 1964 | reg_process_pending_hints(); |
e38f8a7a | 1965 | reg_process_pending_beacon_hints(); |
5fe231e8 | 1966 | rtnl_unlock(); |
fe33eb39 LR |
1967 | } |
1968 | ||
fe33eb39 LR |
1969 | static void queue_regulatory_request(struct regulatory_request *request) |
1970 | { | |
d4f2c881 JB |
1971 | request->alpha2[0] = toupper(request->alpha2[0]); |
1972 | request->alpha2[1] = toupper(request->alpha2[1]); | |
c61029c7 | 1973 | |
fe33eb39 LR |
1974 | spin_lock(®_requests_lock); |
1975 | list_add_tail(&request->list, ®_requests_list); | |
1976 | spin_unlock(®_requests_lock); | |
1977 | ||
1978 | schedule_work(®_work); | |
1979 | } | |
1980 | ||
09d989d1 LR |
1981 | /* |
1982 | * Core regulatory hint -- happens during cfg80211_init() | |
1983 | * and when we restore regulatory settings. | |
1984 | */ | |
ba25c141 LR |
1985 | static int regulatory_hint_core(const char *alpha2) |
1986 | { | |
1987 | struct regulatory_request *request; | |
1988 | ||
1a919318 | 1989 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
ba25c141 LR |
1990 | if (!request) |
1991 | return -ENOMEM; | |
1992 | ||
1993 | request->alpha2[0] = alpha2[0]; | |
1994 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 1995 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
ba25c141 | 1996 | |
31e99729 | 1997 | queue_regulatory_request(request); |
5078b2e3 | 1998 | |
fe33eb39 | 1999 | return 0; |
ba25c141 LR |
2000 | } |
2001 | ||
fe33eb39 | 2002 | /* User hints */ |
57b5ce07 LR |
2003 | int regulatory_hint_user(const char *alpha2, |
2004 | enum nl80211_user_reg_hint_type user_reg_hint_type) | |
b2e1b302 | 2005 | { |
fe33eb39 LR |
2006 | struct regulatory_request *request; |
2007 | ||
fdc9d7b2 JB |
2008 | if (WARN_ON(!alpha2)) |
2009 | return -EINVAL; | |
b2e1b302 | 2010 | |
fe33eb39 LR |
2011 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
2012 | if (!request) | |
2013 | return -ENOMEM; | |
2014 | ||
f4173766 | 2015 | request->wiphy_idx = WIPHY_IDX_INVALID; |
fe33eb39 LR |
2016 | request->alpha2[0] = alpha2[0]; |
2017 | request->alpha2[1] = alpha2[1]; | |
e12822e1 | 2018 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
57b5ce07 | 2019 | request->user_reg_hint_type = user_reg_hint_type; |
fe33eb39 LR |
2020 | |
2021 | queue_regulatory_request(request); | |
2022 | ||
2023 | return 0; | |
2024 | } | |
2025 | ||
52616f2b IP |
2026 | int regulatory_hint_indoor_user(void) |
2027 | { | |
2028 | struct regulatory_request *request; | |
2029 | ||
2030 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); | |
2031 | if (!request) | |
2032 | return -ENOMEM; | |
2033 | ||
2034 | request->wiphy_idx = WIPHY_IDX_INVALID; | |
2035 | request->initiator = NL80211_REGDOM_SET_BY_USER; | |
2036 | request->user_reg_hint_type = NL80211_USER_REG_HINT_INDOOR; | |
2037 | queue_regulatory_request(request); | |
2038 | ||
2039 | return 0; | |
2040 | } | |
2041 | ||
fe33eb39 LR |
2042 | /* Driver hints */ |
2043 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) | |
2044 | { | |
2045 | struct regulatory_request *request; | |
2046 | ||
fdc9d7b2 JB |
2047 | if (WARN_ON(!alpha2 || !wiphy)) |
2048 | return -EINVAL; | |
fe33eb39 | 2049 | |
4f7b9140 LR |
2050 | wiphy->regulatory_flags &= ~REGULATORY_CUSTOM_REG; |
2051 | ||
fe33eb39 LR |
2052 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
2053 | if (!request) | |
2054 | return -ENOMEM; | |
2055 | ||
2056 | request->wiphy_idx = get_wiphy_idx(wiphy); | |
2057 | ||
fe33eb39 LR |
2058 | request->alpha2[0] = alpha2[0]; |
2059 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2060 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
fe33eb39 LR |
2061 | |
2062 | queue_regulatory_request(request); | |
2063 | ||
2064 | return 0; | |
b2e1b302 LR |
2065 | } |
2066 | EXPORT_SYMBOL(regulatory_hint); | |
2067 | ||
789fd033 LR |
2068 | void regulatory_hint_country_ie(struct wiphy *wiphy, enum ieee80211_band band, |
2069 | const u8 *country_ie, u8 country_ie_len) | |
3f2355cb | 2070 | { |
3f2355cb | 2071 | char alpha2[2]; |
3f2355cb | 2072 | enum environment_cap env = ENVIRON_ANY; |
db2424c5 | 2073 | struct regulatory_request *request = NULL, *lr; |
d335fe63 | 2074 | |
3f2355cb LR |
2075 | /* IE len must be evenly divisible by 2 */ |
2076 | if (country_ie_len & 0x01) | |
db2424c5 | 2077 | return; |
3f2355cb LR |
2078 | |
2079 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) | |
db2424c5 JB |
2080 | return; |
2081 | ||
2082 | request = kzalloc(sizeof(*request), GFP_KERNEL); | |
2083 | if (!request) | |
2084 | return; | |
3f2355cb | 2085 | |
3f2355cb LR |
2086 | alpha2[0] = country_ie[0]; |
2087 | alpha2[1] = country_ie[1]; | |
2088 | ||
2089 | if (country_ie[2] == 'I') | |
2090 | env = ENVIRON_INDOOR; | |
2091 | else if (country_ie[2] == 'O') | |
2092 | env = ENVIRON_OUTDOOR; | |
2093 | ||
db2424c5 JB |
2094 | rcu_read_lock(); |
2095 | lr = get_last_request(); | |
2096 | ||
2097 | if (unlikely(!lr)) | |
2098 | goto out; | |
2099 | ||
fb1fc7ad | 2100 | /* |
8b19e6ca | 2101 | * We will run this only upon a successful connection on cfg80211. |
4b44c8bc | 2102 | * We leave conflict resolution to the workqueue, where can hold |
5fe231e8 | 2103 | * the RTNL. |
fb1fc7ad | 2104 | */ |
c492db37 JB |
2105 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
2106 | lr->wiphy_idx != WIPHY_IDX_INVALID) | |
4b44c8bc | 2107 | goto out; |
3f2355cb | 2108 | |
fe33eb39 | 2109 | request->wiphy_idx = get_wiphy_idx(wiphy); |
4f366c5d JL |
2110 | request->alpha2[0] = alpha2[0]; |
2111 | request->alpha2[1] = alpha2[1]; | |
7db90f4a | 2112 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
fe33eb39 LR |
2113 | request->country_ie_env = env; |
2114 | ||
fe33eb39 | 2115 | queue_regulatory_request(request); |
db2424c5 | 2116 | request = NULL; |
3f2355cb | 2117 | out: |
db2424c5 JB |
2118 | kfree(request); |
2119 | rcu_read_unlock(); | |
3f2355cb | 2120 | } |
b2e1b302 | 2121 | |
09d989d1 LR |
2122 | static void restore_alpha2(char *alpha2, bool reset_user) |
2123 | { | |
2124 | /* indicates there is no alpha2 to consider for restoration */ | |
2125 | alpha2[0] = '9'; | |
2126 | alpha2[1] = '7'; | |
2127 | ||
2128 | /* The user setting has precedence over the module parameter */ | |
2129 | if (is_user_regdom_saved()) { | |
2130 | /* Unless we're asked to ignore it and reset it */ | |
2131 | if (reset_user) { | |
1a919318 | 2132 | REG_DBG_PRINT("Restoring regulatory settings including user preference\n"); |
09d989d1 LR |
2133 | user_alpha2[0] = '9'; |
2134 | user_alpha2[1] = '7'; | |
2135 | ||
2136 | /* | |
2137 | * If we're ignoring user settings, we still need to | |
2138 | * check the module parameter to ensure we put things | |
2139 | * back as they were for a full restore. | |
2140 | */ | |
2141 | if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
2142 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
2143 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
2144 | alpha2[0] = ieee80211_regdom[0]; |
2145 | alpha2[1] = ieee80211_regdom[1]; | |
2146 | } | |
2147 | } else { | |
1a919318 JB |
2148 | REG_DBG_PRINT("Restoring regulatory settings while preserving user preference for: %c%c\n", |
2149 | user_alpha2[0], user_alpha2[1]); | |
09d989d1 LR |
2150 | alpha2[0] = user_alpha2[0]; |
2151 | alpha2[1] = user_alpha2[1]; | |
2152 | } | |
2153 | } else if (!is_world_regdom(ieee80211_regdom)) { | |
1a919318 JB |
2154 | REG_DBG_PRINT("Keeping preference on module parameter ieee80211_regdom: %c%c\n", |
2155 | ieee80211_regdom[0], ieee80211_regdom[1]); | |
09d989d1 LR |
2156 | alpha2[0] = ieee80211_regdom[0]; |
2157 | alpha2[1] = ieee80211_regdom[1]; | |
2158 | } else | |
d91e41b6 | 2159 | REG_DBG_PRINT("Restoring regulatory settings\n"); |
09d989d1 LR |
2160 | } |
2161 | ||
5ce543d1 RM |
2162 | static void restore_custom_reg_settings(struct wiphy *wiphy) |
2163 | { | |
2164 | struct ieee80211_supported_band *sband; | |
2165 | enum ieee80211_band band; | |
2166 | struct ieee80211_channel *chan; | |
2167 | int i; | |
2168 | ||
2169 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
2170 | sband = wiphy->bands[band]; | |
2171 | if (!sband) | |
2172 | continue; | |
2173 | for (i = 0; i < sband->n_channels; i++) { | |
2174 | chan = &sband->channels[i]; | |
2175 | chan->flags = chan->orig_flags; | |
2176 | chan->max_antenna_gain = chan->orig_mag; | |
2177 | chan->max_power = chan->orig_mpwr; | |
899852af | 2178 | chan->beacon_found = false; |
5ce543d1 RM |
2179 | } |
2180 | } | |
2181 | } | |
2182 | ||
09d989d1 LR |
2183 | /* |
2184 | * Restoring regulatory settings involves ingoring any | |
2185 | * possibly stale country IE information and user regulatory | |
2186 | * settings if so desired, this includes any beacon hints | |
2187 | * learned as we could have traveled outside to another country | |
2188 | * after disconnection. To restore regulatory settings we do | |
2189 | * exactly what we did at bootup: | |
2190 | * | |
2191 | * - send a core regulatory hint | |
2192 | * - send a user regulatory hint if applicable | |
2193 | * | |
2194 | * Device drivers that send a regulatory hint for a specific country | |
2195 | * keep their own regulatory domain on wiphy->regd so that does does | |
2196 | * not need to be remembered. | |
2197 | */ | |
2198 | static void restore_regulatory_settings(bool reset_user) | |
2199 | { | |
2200 | char alpha2[2]; | |
cee0bec5 | 2201 | char world_alpha2[2]; |
09d989d1 | 2202 | struct reg_beacon *reg_beacon, *btmp; |
14609555 LR |
2203 | struct regulatory_request *reg_request, *tmp; |
2204 | LIST_HEAD(tmp_reg_req_list); | |
5ce543d1 | 2205 | struct cfg80211_registered_device *rdev; |
09d989d1 | 2206 | |
5fe231e8 JB |
2207 | ASSERT_RTNL(); |
2208 | ||
52616f2b IP |
2209 | reg_is_indoor = false; |
2210 | ||
2d319867 | 2211 | reset_regdomains(true, &world_regdom); |
09d989d1 LR |
2212 | restore_alpha2(alpha2, reset_user); |
2213 | ||
14609555 LR |
2214 | /* |
2215 | * If there's any pending requests we simply | |
2216 | * stash them to a temporary pending queue and | |
2217 | * add then after we've restored regulatory | |
2218 | * settings. | |
2219 | */ | |
2220 | spin_lock(®_requests_lock); | |
fea9bced JB |
2221 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2222 | if (reg_request->initiator != NL80211_REGDOM_SET_BY_USER) | |
2223 | continue; | |
2224 | list_move_tail(®_request->list, &tmp_reg_req_list); | |
14609555 LR |
2225 | } |
2226 | spin_unlock(®_requests_lock); | |
2227 | ||
09d989d1 LR |
2228 | /* Clear beacon hints */ |
2229 | spin_lock_bh(®_pending_beacons_lock); | |
fea9bced JB |
2230 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2231 | list_del(®_beacon->list); | |
2232 | kfree(reg_beacon); | |
09d989d1 LR |
2233 | } |
2234 | spin_unlock_bh(®_pending_beacons_lock); | |
2235 | ||
fea9bced JB |
2236 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2237 | list_del(®_beacon->list); | |
2238 | kfree(reg_beacon); | |
09d989d1 LR |
2239 | } |
2240 | ||
2241 | /* First restore to the basic regulatory settings */ | |
379b82f4 JB |
2242 | world_alpha2[0] = cfg80211_world_regdom->alpha2[0]; |
2243 | world_alpha2[1] = cfg80211_world_regdom->alpha2[1]; | |
09d989d1 | 2244 | |
5ce543d1 | 2245 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
a2f73b6c | 2246 | if (rdev->wiphy.regulatory_flags & REGULATORY_CUSTOM_REG) |
5ce543d1 RM |
2247 | restore_custom_reg_settings(&rdev->wiphy); |
2248 | } | |
2249 | ||
cee0bec5 | 2250 | regulatory_hint_core(world_alpha2); |
09d989d1 LR |
2251 | |
2252 | /* | |
2253 | * This restores the ieee80211_regdom module parameter | |
2254 | * preference or the last user requested regulatory | |
2255 | * settings, user regulatory settings takes precedence. | |
2256 | */ | |
2257 | if (is_an_alpha2(alpha2)) | |
57b5ce07 | 2258 | regulatory_hint_user(user_alpha2, NL80211_USER_REG_HINT_USER); |
09d989d1 | 2259 | |
14609555 | 2260 | spin_lock(®_requests_lock); |
11cff96c | 2261 | list_splice_tail_init(&tmp_reg_req_list, ®_requests_list); |
14609555 LR |
2262 | spin_unlock(®_requests_lock); |
2263 | ||
14609555 LR |
2264 | REG_DBG_PRINT("Kicking the queue\n"); |
2265 | ||
2266 | schedule_work(®_work); | |
2267 | } | |
09d989d1 LR |
2268 | |
2269 | void regulatory_hint_disconnect(void) | |
2270 | { | |
1a919318 | 2271 | REG_DBG_PRINT("All devices are disconnected, going to restore regulatory settings\n"); |
09d989d1 LR |
2272 | restore_regulatory_settings(false); |
2273 | } | |
2274 | ||
e38f8a7a LR |
2275 | static bool freq_is_chan_12_13_14(u16 freq) |
2276 | { | |
59eb21a6 BR |
2277 | if (freq == ieee80211_channel_to_frequency(12, IEEE80211_BAND_2GHZ) || |
2278 | freq == ieee80211_channel_to_frequency(13, IEEE80211_BAND_2GHZ) || | |
2279 | freq == ieee80211_channel_to_frequency(14, IEEE80211_BAND_2GHZ)) | |
e38f8a7a LR |
2280 | return true; |
2281 | return false; | |
2282 | } | |
2283 | ||
3ebfa6e7 LR |
2284 | static bool pending_reg_beacon(struct ieee80211_channel *beacon_chan) |
2285 | { | |
2286 | struct reg_beacon *pending_beacon; | |
2287 | ||
2288 | list_for_each_entry(pending_beacon, ®_pending_beacons, list) | |
2289 | if (beacon_chan->center_freq == | |
2290 | pending_beacon->chan.center_freq) | |
2291 | return true; | |
2292 | return false; | |
2293 | } | |
2294 | ||
e38f8a7a LR |
2295 | int regulatory_hint_found_beacon(struct wiphy *wiphy, |
2296 | struct ieee80211_channel *beacon_chan, | |
2297 | gfp_t gfp) | |
2298 | { | |
2299 | struct reg_beacon *reg_beacon; | |
3ebfa6e7 | 2300 | bool processing; |
e38f8a7a | 2301 | |
1a919318 JB |
2302 | if (beacon_chan->beacon_found || |
2303 | beacon_chan->flags & IEEE80211_CHAN_RADAR || | |
e38f8a7a | 2304 | (beacon_chan->band == IEEE80211_BAND_2GHZ && |
1a919318 | 2305 | !freq_is_chan_12_13_14(beacon_chan->center_freq))) |
e38f8a7a LR |
2306 | return 0; |
2307 | ||
3ebfa6e7 LR |
2308 | spin_lock_bh(®_pending_beacons_lock); |
2309 | processing = pending_reg_beacon(beacon_chan); | |
2310 | spin_unlock_bh(®_pending_beacons_lock); | |
2311 | ||
2312 | if (processing) | |
e38f8a7a LR |
2313 | return 0; |
2314 | ||
2315 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); | |
2316 | if (!reg_beacon) | |
2317 | return -ENOMEM; | |
2318 | ||
1a919318 | 2319 | REG_DBG_PRINT("Found new beacon on frequency: %d MHz (Ch %d) on %s\n", |
4113f751 LR |
2320 | beacon_chan->center_freq, |
2321 | ieee80211_frequency_to_channel(beacon_chan->center_freq), | |
2322 | wiphy_name(wiphy)); | |
2323 | ||
e38f8a7a | 2324 | memcpy(®_beacon->chan, beacon_chan, |
1a919318 | 2325 | sizeof(struct ieee80211_channel)); |
e38f8a7a LR |
2326 | |
2327 | /* | |
2328 | * Since we can be called from BH or and non-BH context | |
2329 | * we must use spin_lock_bh() | |
2330 | */ | |
2331 | spin_lock_bh(®_pending_beacons_lock); | |
2332 | list_add_tail(®_beacon->list, ®_pending_beacons); | |
2333 | spin_unlock_bh(®_pending_beacons_lock); | |
2334 | ||
2335 | schedule_work(®_work); | |
2336 | ||
2337 | return 0; | |
2338 | } | |
2339 | ||
a3d2eaf0 | 2340 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
b2e1b302 LR |
2341 | { |
2342 | unsigned int i; | |
a3d2eaf0 JB |
2343 | const struct ieee80211_reg_rule *reg_rule = NULL; |
2344 | const struct ieee80211_freq_range *freq_range = NULL; | |
2345 | const struct ieee80211_power_rule *power_rule = NULL; | |
089027e5 | 2346 | char bw[32], cac_time[32]; |
b2e1b302 | 2347 | |
089027e5 | 2348 | pr_info(" (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)\n"); |
b2e1b302 LR |
2349 | |
2350 | for (i = 0; i < rd->n_reg_rules; i++) { | |
2351 | reg_rule = &rd->reg_rules[i]; | |
2352 | freq_range = ®_rule->freq_range; | |
2353 | power_rule = ®_rule->power_rule; | |
2354 | ||
b0dfd2ea JD |
2355 | if (reg_rule->flags & NL80211_RRF_AUTO_BW) |
2356 | snprintf(bw, sizeof(bw), "%d KHz, %d KHz AUTO", | |
2357 | freq_range->max_bandwidth_khz, | |
97524820 JD |
2358 | reg_get_max_bandwidth(rd, reg_rule)); |
2359 | else | |
b0dfd2ea | 2360 | snprintf(bw, sizeof(bw), "%d KHz", |
97524820 JD |
2361 | freq_range->max_bandwidth_khz); |
2362 | ||
089027e5 JD |
2363 | if (reg_rule->flags & NL80211_RRF_DFS) |
2364 | scnprintf(cac_time, sizeof(cac_time), "%u s", | |
2365 | reg_rule->dfs_cac_ms/1000); | |
2366 | else | |
2367 | scnprintf(cac_time, sizeof(cac_time), "N/A"); | |
2368 | ||
2369 | ||
fb1fc7ad LR |
2370 | /* |
2371 | * There may not be documentation for max antenna gain | |
2372 | * in certain regions | |
2373 | */ | |
b2e1b302 | 2374 | if (power_rule->max_antenna_gain) |
089027e5 | 2375 | pr_info(" (%d KHz - %d KHz @ %s), (%d mBi, %d mBm), (%s)\n", |
b2e1b302 LR |
2376 | freq_range->start_freq_khz, |
2377 | freq_range->end_freq_khz, | |
97524820 | 2378 | bw, |
b2e1b302 | 2379 | power_rule->max_antenna_gain, |
089027e5 JD |
2380 | power_rule->max_eirp, |
2381 | cac_time); | |
b2e1b302 | 2382 | else |
089027e5 | 2383 | pr_info(" (%d KHz - %d KHz @ %s), (N/A, %d mBm), (%s)\n", |
b2e1b302 LR |
2384 | freq_range->start_freq_khz, |
2385 | freq_range->end_freq_khz, | |
97524820 | 2386 | bw, |
089027e5 JD |
2387 | power_rule->max_eirp, |
2388 | cac_time); | |
b2e1b302 LR |
2389 | } |
2390 | } | |
2391 | ||
4c7d3982 | 2392 | bool reg_supported_dfs_region(enum nl80211_dfs_regions dfs_region) |
8b60b078 LR |
2393 | { |
2394 | switch (dfs_region) { | |
2395 | case NL80211_DFS_UNSET: | |
2396 | case NL80211_DFS_FCC: | |
2397 | case NL80211_DFS_ETSI: | |
2398 | case NL80211_DFS_JP: | |
2399 | return true; | |
2400 | default: | |
2401 | REG_DBG_PRINT("Ignoring uknown DFS master region: %d\n", | |
2402 | dfs_region); | |
2403 | return false; | |
2404 | } | |
2405 | } | |
2406 | ||
a3d2eaf0 | 2407 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2408 | { |
c492db37 | 2409 | struct regulatory_request *lr = get_last_request(); |
b2e1b302 | 2410 | |
3f2355cb | 2411 | if (is_intersected_alpha2(rd->alpha2)) { |
c492db37 | 2412 | if (lr->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
79c97e97 | 2413 | struct cfg80211_registered_device *rdev; |
c492db37 | 2414 | rdev = cfg80211_rdev_by_wiphy_idx(lr->wiphy_idx); |
79c97e97 | 2415 | if (rdev) { |
e9c0268f | 2416 | pr_info("Current regulatory domain updated by AP to: %c%c\n", |
79c97e97 JB |
2417 | rdev->country_ie_alpha2[0], |
2418 | rdev->country_ie_alpha2[1]); | |
3f2355cb | 2419 | } else |
e9c0268f | 2420 | pr_info("Current regulatory domain intersected:\n"); |
3f2355cb | 2421 | } else |
e9c0268f | 2422 | pr_info("Current regulatory domain intersected:\n"); |
1a919318 | 2423 | } else if (is_world_regdom(rd->alpha2)) { |
e9c0268f | 2424 | pr_info("World regulatory domain updated:\n"); |
1a919318 | 2425 | } else { |
b2e1b302 | 2426 | if (is_unknown_alpha2(rd->alpha2)) |
e9c0268f | 2427 | pr_info("Regulatory domain changed to driver built-in settings (unknown country)\n"); |
57b5ce07 | 2428 | else { |
c492db37 | 2429 | if (reg_request_cell_base(lr)) |
1a919318 | 2430 | pr_info("Regulatory domain changed to country: %c%c by Cell Station\n", |
57b5ce07 LR |
2431 | rd->alpha2[0], rd->alpha2[1]); |
2432 | else | |
1a919318 | 2433 | pr_info("Regulatory domain changed to country: %c%c\n", |
57b5ce07 LR |
2434 | rd->alpha2[0], rd->alpha2[1]); |
2435 | } | |
b2e1b302 | 2436 | } |
1a919318 | 2437 | |
3ef121b5 | 2438 | pr_info(" DFS Master region: %s", reg_dfs_region_str(rd->dfs_region)); |
b2e1b302 LR |
2439 | print_rd_rules(rd); |
2440 | } | |
2441 | ||
2df78167 | 2442 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2443 | { |
e9c0268f | 2444 | pr_info("Regulatory domain: %c%c\n", rd->alpha2[0], rd->alpha2[1]); |
b2e1b302 LR |
2445 | print_rd_rules(rd); |
2446 | } | |
2447 | ||
3b9e5aca LR |
2448 | static int reg_set_rd_core(const struct ieee80211_regdomain *rd) |
2449 | { | |
2450 | if (!is_world_regdom(rd->alpha2)) | |
2451 | return -EINVAL; | |
2452 | update_world_regdomain(rd); | |
2453 | return 0; | |
2454 | } | |
2455 | ||
84721d44 LR |
2456 | static int reg_set_rd_user(const struct ieee80211_regdomain *rd, |
2457 | struct regulatory_request *user_request) | |
2458 | { | |
2459 | const struct ieee80211_regdomain *intersected_rd = NULL; | |
2460 | ||
84721d44 LR |
2461 | if (!regdom_changes(rd->alpha2)) |
2462 | return -EALREADY; | |
2463 | ||
2464 | if (!is_valid_rd(rd)) { | |
2465 | pr_err("Invalid regulatory domain detected:\n"); | |
2466 | print_regdomain_info(rd); | |
2467 | return -EINVAL; | |
2468 | } | |
2469 | ||
2470 | if (!user_request->intersect) { | |
2471 | reset_regdomains(false, rd); | |
2472 | return 0; | |
2473 | } | |
2474 | ||
2475 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); | |
2476 | if (!intersected_rd) | |
2477 | return -EINVAL; | |
2478 | ||
2479 | kfree(rd); | |
2480 | rd = NULL; | |
2481 | reset_regdomains(false, intersected_rd); | |
2482 | ||
2483 | return 0; | |
2484 | } | |
2485 | ||
f5fe3247 LR |
2486 | static int reg_set_rd_driver(const struct ieee80211_regdomain *rd, |
2487 | struct regulatory_request *driver_request) | |
b2e1b302 | 2488 | { |
e9763c3c | 2489 | const struct ieee80211_regdomain *regd; |
9c96477d | 2490 | const struct ieee80211_regdomain *intersected_rd = NULL; |
f5fe3247 | 2491 | const struct ieee80211_regdomain *tmp; |
806a9e39 | 2492 | struct wiphy *request_wiphy; |
6913b49a | 2493 | |
f5fe3247 | 2494 | if (is_world_regdom(rd->alpha2)) |
b2e1b302 LR |
2495 | return -EINVAL; |
2496 | ||
f5fe3247 LR |
2497 | if (!regdom_changes(rd->alpha2)) |
2498 | return -EALREADY; | |
b2e1b302 | 2499 | |
8375af3b | 2500 | if (!is_valid_rd(rd)) { |
e9c0268f | 2501 | pr_err("Invalid regulatory domain detected:\n"); |
8375af3b LR |
2502 | print_regdomain_info(rd); |
2503 | return -EINVAL; | |
b2e1b302 LR |
2504 | } |
2505 | ||
f5fe3247 LR |
2506 | request_wiphy = wiphy_idx_to_wiphy(driver_request->wiphy_idx); |
2507 | if (!request_wiphy) { | |
845f3351 SD |
2508 | queue_delayed_work(system_power_efficient_wq, |
2509 | ®_timeout, 0); | |
de3584bd JB |
2510 | return -ENODEV; |
2511 | } | |
806a9e39 | 2512 | |
f5fe3247 | 2513 | if (!driver_request->intersect) { |
558f6d32 LR |
2514 | if (request_wiphy->regd) |
2515 | return -EALREADY; | |
3e0c3ff3 | 2516 | |
e9763c3c JB |
2517 | regd = reg_copy_regd(rd); |
2518 | if (IS_ERR(regd)) | |
2519 | return PTR_ERR(regd); | |
3e0c3ff3 | 2520 | |
458f4f9e | 2521 | rcu_assign_pointer(request_wiphy->regd, regd); |
379b82f4 | 2522 | reset_regdomains(false, rd); |
b8295acd LR |
2523 | return 0; |
2524 | } | |
2525 | ||
f5fe3247 LR |
2526 | intersected_rd = regdom_intersect(rd, get_cfg80211_regdom()); |
2527 | if (!intersected_rd) | |
2528 | return -EINVAL; | |
b8295acd | 2529 | |
f5fe3247 LR |
2530 | /* |
2531 | * We can trash what CRDA provided now. | |
2532 | * However if a driver requested this specific regulatory | |
2533 | * domain we keep it for its private use | |
2534 | */ | |
2535 | tmp = get_wiphy_regdom(request_wiphy); | |
2536 | rcu_assign_pointer(request_wiphy->regd, rd); | |
2537 | rcu_free_regdom(tmp); | |
b8295acd | 2538 | |
f5fe3247 | 2539 | rd = NULL; |
b7566fc3 | 2540 | |
f5fe3247 | 2541 | reset_regdomains(false, intersected_rd); |
3e0c3ff3 | 2542 | |
f5fe3247 LR |
2543 | return 0; |
2544 | } | |
2545 | ||
01992406 LR |
2546 | static int reg_set_rd_country_ie(const struct ieee80211_regdomain *rd, |
2547 | struct regulatory_request *country_ie_request) | |
f5fe3247 LR |
2548 | { |
2549 | struct wiphy *request_wiphy; | |
b8295acd | 2550 | |
f5fe3247 LR |
2551 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && |
2552 | !is_unknown_alpha2(rd->alpha2)) | |
2553 | return -EINVAL; | |
b8295acd | 2554 | |
f5fe3247 LR |
2555 | /* |
2556 | * Lets only bother proceeding on the same alpha2 if the current | |
2557 | * rd is non static (it means CRDA was present and was used last) | |
2558 | * and the pending request came in from a country IE | |
2559 | */ | |
2560 | ||
2561 | if (!is_valid_rd(rd)) { | |
2562 | pr_err("Invalid regulatory domain detected:\n"); | |
2563 | print_regdomain_info(rd); | |
2564 | return -EINVAL; | |
9c96477d LR |
2565 | } |
2566 | ||
01992406 | 2567 | request_wiphy = wiphy_idx_to_wiphy(country_ie_request->wiphy_idx); |
f5fe3247 | 2568 | if (!request_wiphy) { |
845f3351 SD |
2569 | queue_delayed_work(system_power_efficient_wq, |
2570 | ®_timeout, 0); | |
f5fe3247 LR |
2571 | return -ENODEV; |
2572 | } | |
b2e1b302 | 2573 | |
01992406 | 2574 | if (country_ie_request->intersect) |
f5fe3247 LR |
2575 | return -EINVAL; |
2576 | ||
2577 | reset_regdomains(false, rd); | |
2578 | return 0; | |
2579 | } | |
b2e1b302 | 2580 | |
fb1fc7ad LR |
2581 | /* |
2582 | * Use this call to set the current regulatory domain. Conflicts with | |
b2e1b302 | 2583 | * multiple drivers can be ironed out later. Caller must've already |
458f4f9e | 2584 | * kmalloc'd the rd structure. |
fb1fc7ad | 2585 | */ |
a3d2eaf0 | 2586 | int set_regdom(const struct ieee80211_regdomain *rd) |
b2e1b302 | 2587 | { |
c492db37 | 2588 | struct regulatory_request *lr; |
092008ab | 2589 | bool user_reset = false; |
b2e1b302 LR |
2590 | int r; |
2591 | ||
3b9e5aca LR |
2592 | if (!reg_is_valid_request(rd->alpha2)) { |
2593 | kfree(rd); | |
2594 | return -EINVAL; | |
2595 | } | |
2596 | ||
c492db37 | 2597 | lr = get_last_request(); |
abc7381b | 2598 | |
b2e1b302 | 2599 | /* Note that this doesn't update the wiphys, this is done below */ |
3b9e5aca LR |
2600 | switch (lr->initiator) { |
2601 | case NL80211_REGDOM_SET_BY_CORE: | |
2602 | r = reg_set_rd_core(rd); | |
2603 | break; | |
2604 | case NL80211_REGDOM_SET_BY_USER: | |
84721d44 | 2605 | r = reg_set_rd_user(rd, lr); |
092008ab | 2606 | user_reset = true; |
84721d44 | 2607 | break; |
3b9e5aca | 2608 | case NL80211_REGDOM_SET_BY_DRIVER: |
f5fe3247 LR |
2609 | r = reg_set_rd_driver(rd, lr); |
2610 | break; | |
3b9e5aca | 2611 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
01992406 | 2612 | r = reg_set_rd_country_ie(rd, lr); |
3b9e5aca LR |
2613 | break; |
2614 | default: | |
2615 | WARN(1, "invalid initiator %d\n", lr->initiator); | |
2616 | return -EINVAL; | |
2617 | } | |
2618 | ||
d2372b31 | 2619 | if (r) { |
092008ab JD |
2620 | switch (r) { |
2621 | case -EALREADY: | |
95908535 | 2622 | reg_set_request_processed(); |
092008ab JD |
2623 | break; |
2624 | default: | |
2625 | /* Back to world regulatory in case of errors */ | |
2626 | restore_regulatory_settings(user_reset); | |
2627 | } | |
95908535 | 2628 | |
d2372b31 | 2629 | kfree(rd); |
38fd2143 | 2630 | return r; |
d2372b31 | 2631 | } |
b2e1b302 | 2632 | |
b2e1b302 | 2633 | /* This would make this whole thing pointless */ |
38fd2143 JB |
2634 | if (WARN_ON(!lr->intersect && rd != get_cfg80211_regdom())) |
2635 | return -EINVAL; | |
b2e1b302 LR |
2636 | |
2637 | /* update all wiphys now with the new established regulatory domain */ | |
c492db37 | 2638 | update_all_wiphy_regulatory(lr->initiator); |
b2e1b302 | 2639 | |
458f4f9e | 2640 | print_regdomain(get_cfg80211_regdom()); |
b2e1b302 | 2641 | |
c492db37 | 2642 | nl80211_send_reg_change_event(lr); |
73d54c9e | 2643 | |
b2e253cf LR |
2644 | reg_set_request_processed(); |
2645 | ||
38fd2143 | 2646 | return 0; |
b2e1b302 LR |
2647 | } |
2648 | ||
57b5ce07 LR |
2649 | void wiphy_regulatory_register(struct wiphy *wiphy) |
2650 | { | |
23df0b73 AN |
2651 | struct regulatory_request *lr; |
2652 | ||
57b5ce07 LR |
2653 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2654 | reg_num_devs_support_basehint++; | |
2655 | ||
23df0b73 AN |
2656 | lr = get_last_request(); |
2657 | wiphy_update_regulatory(wiphy, lr->initiator); | |
57b5ce07 LR |
2658 | } |
2659 | ||
bfead080 | 2660 | void wiphy_regulatory_deregister(struct wiphy *wiphy) |
3f2355cb | 2661 | { |
0ad8acaf | 2662 | struct wiphy *request_wiphy = NULL; |
c492db37 | 2663 | struct regulatory_request *lr; |
761cf7ec | 2664 | |
c492db37 | 2665 | lr = get_last_request(); |
abc7381b | 2666 | |
57b5ce07 LR |
2667 | if (!reg_dev_ignore_cell_hint(wiphy)) |
2668 | reg_num_devs_support_basehint--; | |
2669 | ||
458f4f9e | 2670 | rcu_free_regdom(get_wiphy_regdom(wiphy)); |
34dd886c | 2671 | RCU_INIT_POINTER(wiphy->regd, NULL); |
0ef9ccdd | 2672 | |
c492db37 JB |
2673 | if (lr) |
2674 | request_wiphy = wiphy_idx_to_wiphy(lr->wiphy_idx); | |
806a9e39 | 2675 | |
0ef9ccdd | 2676 | if (!request_wiphy || request_wiphy != wiphy) |
38fd2143 | 2677 | return; |
0ef9ccdd | 2678 | |
c492db37 JB |
2679 | lr->wiphy_idx = WIPHY_IDX_INVALID; |
2680 | lr->country_ie_env = ENVIRON_ANY; | |
3f2355cb LR |
2681 | } |
2682 | ||
a90c7a31 LR |
2683 | static void reg_timeout_work(struct work_struct *work) |
2684 | { | |
1a919318 | 2685 | REG_DBG_PRINT("Timeout while waiting for CRDA to reply, restoring regulatory settings\n"); |
f77b86d7 | 2686 | rtnl_lock(); |
a90c7a31 | 2687 | restore_regulatory_settings(true); |
f77b86d7 | 2688 | rtnl_unlock(); |
a90c7a31 LR |
2689 | } |
2690 | ||
174e0cd2 IP |
2691 | /* |
2692 | * See http://www.fcc.gov/document/5-ghz-unlicensed-spectrum-unii, for | |
2693 | * UNII band definitions | |
2694 | */ | |
2695 | int cfg80211_get_unii(int freq) | |
2696 | { | |
2697 | /* UNII-1 */ | |
2698 | if (freq >= 5150 && freq <= 5250) | |
2699 | return 0; | |
2700 | ||
2701 | /* UNII-2A */ | |
2702 | if (freq > 5250 && freq <= 5350) | |
2703 | return 1; | |
2704 | ||
2705 | /* UNII-2B */ | |
2706 | if (freq > 5350 && freq <= 5470) | |
2707 | return 2; | |
2708 | ||
2709 | /* UNII-2C */ | |
2710 | if (freq > 5470 && freq <= 5725) | |
2711 | return 3; | |
2712 | ||
2713 | /* UNII-3 */ | |
2714 | if (freq > 5725 && freq <= 5825) | |
2715 | return 4; | |
2716 | ||
2717 | return -EINVAL; | |
2718 | } | |
2719 | ||
c8866e55 IP |
2720 | bool regulatory_indoor_allowed(void) |
2721 | { | |
2722 | return reg_is_indoor; | |
2723 | } | |
2724 | ||
2fcc9f73 | 2725 | int __init regulatory_init(void) |
b2e1b302 | 2726 | { |
bcf4f99b | 2727 | int err = 0; |
734366de | 2728 | |
b2e1b302 LR |
2729 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
2730 | if (IS_ERR(reg_pdev)) | |
2731 | return PTR_ERR(reg_pdev); | |
734366de | 2732 | |
fe33eb39 | 2733 | spin_lock_init(®_requests_lock); |
e38f8a7a | 2734 | spin_lock_init(®_pending_beacons_lock); |
fe33eb39 | 2735 | |
80007efe LR |
2736 | reg_regdb_size_check(); |
2737 | ||
458f4f9e | 2738 | rcu_assign_pointer(cfg80211_regdomain, cfg80211_world_regdom); |
734366de | 2739 | |
09d989d1 LR |
2740 | user_alpha2[0] = '9'; |
2741 | user_alpha2[1] = '7'; | |
2742 | ||
ae9e4b0d | 2743 | /* We always try to get an update for the static regdomain */ |
458f4f9e | 2744 | err = regulatory_hint_core(cfg80211_world_regdom->alpha2); |
ba25c141 | 2745 | if (err) { |
bcf4f99b LR |
2746 | if (err == -ENOMEM) |
2747 | return err; | |
2748 | /* | |
2749 | * N.B. kobject_uevent_env() can fail mainly for when we're out | |
2750 | * memory which is handled and propagated appropriately above | |
2751 | * but it can also fail during a netlink_broadcast() or during | |
2752 | * early boot for call_usermodehelper(). For now treat these | |
2753 | * errors as non-fatal. | |
2754 | */ | |
e9c0268f | 2755 | pr_err("kobject_uevent_env() was unable to call CRDA during init\n"); |
bcf4f99b | 2756 | } |
734366de | 2757 | |
ae9e4b0d LR |
2758 | /* |
2759 | * Finally, if the user set the module parameter treat it | |
2760 | * as a user hint. | |
2761 | */ | |
2762 | if (!is_world_regdom(ieee80211_regdom)) | |
57b5ce07 LR |
2763 | regulatory_hint_user(ieee80211_regdom, |
2764 | NL80211_USER_REG_HINT_USER); | |
ae9e4b0d | 2765 | |
b2e1b302 LR |
2766 | return 0; |
2767 | } | |
2768 | ||
1a919318 | 2769 | void regulatory_exit(void) |
b2e1b302 | 2770 | { |
fe33eb39 | 2771 | struct regulatory_request *reg_request, *tmp; |
e38f8a7a | 2772 | struct reg_beacon *reg_beacon, *btmp; |
fe33eb39 LR |
2773 | |
2774 | cancel_work_sync(®_work); | |
a90c7a31 | 2775 | cancel_delayed_work_sync(®_timeout); |
fe33eb39 | 2776 | |
9027b149 | 2777 | /* Lock to suppress warnings */ |
38fd2143 | 2778 | rtnl_lock(); |
379b82f4 | 2779 | reset_regdomains(true, NULL); |
38fd2143 | 2780 | rtnl_unlock(); |
734366de | 2781 | |
58ebacc6 | 2782 | dev_set_uevent_suppress(®_pdev->dev, true); |
f6037d09 | 2783 | |
b2e1b302 | 2784 | platform_device_unregister(reg_pdev); |
734366de | 2785 | |
fea9bced JB |
2786 | list_for_each_entry_safe(reg_beacon, btmp, ®_pending_beacons, list) { |
2787 | list_del(®_beacon->list); | |
2788 | kfree(reg_beacon); | |
e38f8a7a | 2789 | } |
e38f8a7a | 2790 | |
fea9bced JB |
2791 | list_for_each_entry_safe(reg_beacon, btmp, ®_beacon_list, list) { |
2792 | list_del(®_beacon->list); | |
2793 | kfree(reg_beacon); | |
e38f8a7a LR |
2794 | } |
2795 | ||
fea9bced JB |
2796 | list_for_each_entry_safe(reg_request, tmp, ®_requests_list, list) { |
2797 | list_del(®_request->list); | |
2798 | kfree(reg_request); | |
fe33eb39 | 2799 | } |
8318d78a | 2800 | } |