Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2002-2005, Instant802 Networks, Inc. |
| 3 | * Copyright 2005-2006, Devicescape Software, Inc. |
| 4 | * Copyright 2007 Johannes Berg <johannes@sipsolutions.net> |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 5 | * Copyright 2008 Luis R. Rodriguez <lrodriguz@atheros.com> |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | */ |
| 11 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 12 | /** |
| 13 | * DOC: Wireless regulatory infrastructure |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 14 | * |
| 15 | * The usual implementation is for a driver to read a device EEPROM to |
| 16 | * determine which regulatory domain it should be operating under, then |
| 17 | * looking up the allowable channels in a driver-local table and finally |
| 18 | * registering those channels in the wiphy structure. |
| 19 | * |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 20 | * Another set of compliance enforcement is for drivers to use their |
| 21 | * own compliance limits which can be stored on the EEPROM. The host |
| 22 | * driver or firmware may ensure these are used. |
| 23 | * |
| 24 | * In addition to all this we provide an extra layer of regulatory |
| 25 | * conformance. For drivers which do not have any regulatory |
| 26 | * information CRDA provides the complete regulatory solution. |
| 27 | * For others it provides a community effort on further restrictions |
| 28 | * to enhance compliance. |
| 29 | * |
| 30 | * Note: When number of rules --> infinity we will not be able to |
| 31 | * index on alpha2 any more, instead we'll probably have to |
| 32 | * rely on some SHA1 checksum of the regdomain for example. |
| 33 | * |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 34 | */ |
| 35 | #include <linux/kernel.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 36 | #include <linux/slab.h> |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 37 | #include <linux/list.h> |
| 38 | #include <linux/random.h> |
John W. Linville | c61029c | 2010-08-05 14:26:24 -0400 | [diff] [blame] | 39 | #include <linux/ctype.h> |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 40 | #include <linux/nl80211.h> |
| 41 | #include <linux/platform_device.h> |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 42 | #include <net/cfg80211.h> |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 43 | #include "core.h" |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 44 | #include "reg.h" |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 45 | #include "regdb.h" |
Luis R. Rodriguez | 73d54c9 | 2009-03-09 22:07:42 -0400 | [diff] [blame] | 46 | #include "nl80211.h" |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 47 | |
Luis R. Rodriguez | 4113f75 | 2010-01-04 11:50:11 -0500 | [diff] [blame] | 48 | #ifdef CONFIG_CFG80211_REG_DEBUG |
John W. Linville | 8271195 | 2010-01-05 17:57:20 -0500 | [diff] [blame] | 49 | #define REG_DBG_PRINT(format, args...) \ |
Luis R. Rodriguez | 4113f75 | 2010-01-04 11:50:11 -0500 | [diff] [blame] | 50 | do { \ |
John W. Linville | 8271195 | 2010-01-05 17:57:20 -0500 | [diff] [blame] | 51 | printk(KERN_DEBUG format , ## args); \ |
Luis R. Rodriguez | 4113f75 | 2010-01-04 11:50:11 -0500 | [diff] [blame] | 52 | } while (0) |
| 53 | #else |
John W. Linville | 8271195 | 2010-01-05 17:57:20 -0500 | [diff] [blame] | 54 | #define REG_DBG_PRINT(args...) |
Luis R. Rodriguez | 4113f75 | 2010-01-04 11:50:11 -0500 | [diff] [blame] | 55 | #endif |
| 56 | |
Luis R. Rodriguez | 5166ccd | 2008-10-30 13:33:56 -0700 | [diff] [blame] | 57 | /* Receipt of information from last regulatory request */ |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 58 | static struct regulatory_request *last_request; |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 59 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 60 | /* To trigger userspace events */ |
| 61 | static struct platform_device *reg_pdev; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 62 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 63 | /* |
| 64 | * Central wireless core regulatory domains, we only need two, |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 65 | * the current one and a world regulatory domain in case we have no |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 66 | * information to give us an alpha2 |
| 67 | */ |
Luis R. Rodriguez | f130347 | 2009-01-30 09:26:42 -0800 | [diff] [blame] | 68 | const struct ieee80211_regdomain *cfg80211_regdomain; |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 69 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 70 | /* |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 71 | * Protects static reg.c components: |
| 72 | * - cfg80211_world_regdom |
| 73 | * - cfg80211_regdom |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 74 | * - last_request |
| 75 | */ |
John W. Linville | 670b7f1 | 2010-06-24 11:26:31 -0400 | [diff] [blame] | 76 | static DEFINE_MUTEX(reg_mutex); |
Johannes Berg | 46a5eba | 2010-09-15 13:28:15 +0200 | [diff] [blame] | 77 | |
| 78 | static inline void assert_reg_lock(void) |
| 79 | { |
| 80 | lockdep_assert_held(®_mutex); |
| 81 | } |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 82 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 83 | /* Used to queue up regulatory hints */ |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 84 | static LIST_HEAD(reg_requests_list); |
| 85 | static spinlock_t reg_requests_lock; |
| 86 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 87 | /* Used to queue up beacon hints for review */ |
| 88 | static LIST_HEAD(reg_pending_beacons); |
| 89 | static spinlock_t reg_pending_beacons_lock; |
| 90 | |
| 91 | /* Used to keep track of processed beacon hints */ |
| 92 | static LIST_HEAD(reg_beacon_list); |
| 93 | |
| 94 | struct reg_beacon { |
| 95 | struct list_head list; |
| 96 | struct ieee80211_channel chan; |
| 97 | }; |
| 98 | |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 99 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
| 100 | static const struct ieee80211_regdomain world_regdom = { |
Luis R. Rodriguez | 611b6a8 | 2009-03-05 21:19:21 -0800 | [diff] [blame] | 101 | .n_reg_rules = 5, |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 102 | .alpha2 = "00", |
| 103 | .reg_rules = { |
Luis R. Rodriguez | 68798a6 | 2009-02-21 00:20:37 -0500 | [diff] [blame] | 104 | /* IEEE 802.11b/g, channels 1..11 */ |
| 105 | REG_RULE(2412-10, 2462+10, 40, 6, 20, 0), |
Luis R. Rodriguez | 611b6a8 | 2009-03-05 21:19:21 -0800 | [diff] [blame] | 106 | /* IEEE 802.11b/g, channels 12..13. No HT40 |
| 107 | * channel fits here. */ |
| 108 | REG_RULE(2467-10, 2472+10, 20, 6, 20, |
Luis R. Rodriguez | 3fc71f7 | 2009-02-21 00:20:38 -0500 | [diff] [blame] | 109 | NL80211_RRF_PASSIVE_SCAN | |
| 110 | NL80211_RRF_NO_IBSS), |
Luis R. Rodriguez | 611b6a8 | 2009-03-05 21:19:21 -0800 | [diff] [blame] | 111 | /* IEEE 802.11 channel 14 - Only JP enables |
| 112 | * this and for 802.11b only */ |
| 113 | REG_RULE(2484-10, 2484+10, 20, 6, 20, |
| 114 | NL80211_RRF_PASSIVE_SCAN | |
| 115 | NL80211_RRF_NO_IBSS | |
| 116 | NL80211_RRF_NO_OFDM), |
| 117 | /* IEEE 802.11a, channel 36..48 */ |
Luis R. Rodriguez | ec329ac | 2009-03-05 21:19:22 -0800 | [diff] [blame] | 118 | REG_RULE(5180-10, 5240+10, 40, 6, 20, |
Luis R. Rodriguez | 611b6a8 | 2009-03-05 21:19:21 -0800 | [diff] [blame] | 119 | NL80211_RRF_PASSIVE_SCAN | |
| 120 | NL80211_RRF_NO_IBSS), |
Luis R. Rodriguez | 3fc71f7 | 2009-02-21 00:20:38 -0500 | [diff] [blame] | 121 | |
| 122 | /* NB: 5260 MHz - 5700 MHz requies DFS */ |
| 123 | |
| 124 | /* IEEE 802.11a, channel 149..165 */ |
Luis R. Rodriguez | ec329ac | 2009-03-05 21:19:22 -0800 | [diff] [blame] | 125 | REG_RULE(5745-10, 5825+10, 40, 6, 20, |
Luis R. Rodriguez | 3fc71f7 | 2009-02-21 00:20:38 -0500 | [diff] [blame] | 126 | NL80211_RRF_PASSIVE_SCAN | |
| 127 | NL80211_RRF_NO_IBSS), |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 128 | } |
| 129 | }; |
| 130 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 131 | static const struct ieee80211_regdomain *cfg80211_world_regdom = |
| 132 | &world_regdom; |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 133 | |
Luis R. Rodriguez | 6ee7d33 | 2009-03-20 23:53:06 -0400 | [diff] [blame] | 134 | static char *ieee80211_regdom = "00"; |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 135 | static char user_alpha2[2]; |
Luis R. Rodriguez | 6ee7d33 | 2009-03-20 23:53:06 -0400 | [diff] [blame] | 136 | |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 137 | module_param(ieee80211_regdom, charp, 0444); |
| 138 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); |
| 139 | |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 140 | static void reset_regdomains(void) |
| 141 | { |
Johannes Berg | 942b25c | 2008-09-15 11:26:47 +0200 | [diff] [blame] | 142 | /* avoid freeing static information or freeing something twice */ |
| 143 | if (cfg80211_regdomain == cfg80211_world_regdom) |
| 144 | cfg80211_regdomain = NULL; |
| 145 | if (cfg80211_world_regdom == &world_regdom) |
| 146 | cfg80211_world_regdom = NULL; |
| 147 | if (cfg80211_regdomain == &world_regdom) |
| 148 | cfg80211_regdomain = NULL; |
Johannes Berg | 942b25c | 2008-09-15 11:26:47 +0200 | [diff] [blame] | 149 | |
| 150 | kfree(cfg80211_regdomain); |
| 151 | kfree(cfg80211_world_regdom); |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 152 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 153 | cfg80211_world_regdom = &world_regdom; |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 154 | cfg80211_regdomain = NULL; |
| 155 | } |
| 156 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 157 | /* |
| 158 | * Dynamic world regulatory domain requested by the wireless |
| 159 | * core upon initialization |
| 160 | */ |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 161 | static void update_world_regdomain(const struct ieee80211_regdomain *rd) |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 162 | { |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 163 | BUG_ON(!last_request); |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 164 | |
| 165 | reset_regdomains(); |
| 166 | |
| 167 | cfg80211_world_regdom = rd; |
| 168 | cfg80211_regdomain = rd; |
| 169 | } |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 170 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 171 | bool is_world_regdom(const char *alpha2) |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 172 | { |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 173 | if (!alpha2) |
| 174 | return false; |
| 175 | if (alpha2[0] == '0' && alpha2[1] == '0') |
| 176 | return true; |
| 177 | return false; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 178 | } |
| 179 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 180 | static bool is_alpha2_set(const char *alpha2) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 181 | { |
| 182 | if (!alpha2) |
| 183 | return false; |
| 184 | if (alpha2[0] != 0 && alpha2[1] != 0) |
| 185 | return true; |
| 186 | return false; |
| 187 | } |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 188 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 189 | static bool is_unknown_alpha2(const char *alpha2) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 190 | { |
| 191 | if (!alpha2) |
| 192 | return false; |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 193 | /* |
| 194 | * Special case where regulatory domain was built by driver |
| 195 | * but a specific alpha2 cannot be determined |
| 196 | */ |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 197 | if (alpha2[0] == '9' && alpha2[1] == '9') |
| 198 | return true; |
| 199 | return false; |
| 200 | } |
| 201 | |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 202 | static bool is_intersected_alpha2(const char *alpha2) |
| 203 | { |
| 204 | if (!alpha2) |
| 205 | return false; |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 206 | /* |
| 207 | * Special case where regulatory domain is the |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 208 | * result of an intersection between two regulatory domain |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 209 | * structures |
| 210 | */ |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 211 | if (alpha2[0] == '9' && alpha2[1] == '8') |
| 212 | return true; |
| 213 | return false; |
| 214 | } |
| 215 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 216 | static bool is_an_alpha2(const char *alpha2) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 217 | { |
| 218 | if (!alpha2) |
| 219 | return false; |
John W. Linville | c61029c | 2010-08-05 14:26:24 -0400 | [diff] [blame] | 220 | if (isalpha(alpha2[0]) && isalpha(alpha2[1])) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 221 | return true; |
| 222 | return false; |
| 223 | } |
| 224 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 225 | static bool alpha2_equal(const char *alpha2_x, const char *alpha2_y) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 226 | { |
| 227 | if (!alpha2_x || !alpha2_y) |
| 228 | return false; |
| 229 | if (alpha2_x[0] == alpha2_y[0] && |
| 230 | alpha2_x[1] == alpha2_y[1]) |
| 231 | return true; |
| 232 | return false; |
| 233 | } |
| 234 | |
Luis R. Rodriguez | 69b1572 | 2009-02-21 00:04:33 -0500 | [diff] [blame] | 235 | static bool regdom_changes(const char *alpha2) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 236 | { |
Luis R. Rodriguez | 761cf7e | 2009-02-21 00:04:25 -0500 | [diff] [blame] | 237 | assert_cfg80211_lock(); |
| 238 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 239 | if (!cfg80211_regdomain) |
| 240 | return true; |
| 241 | if (alpha2_equal(cfg80211_regdomain->alpha2, alpha2)) |
| 242 | return false; |
| 243 | return true; |
| 244 | } |
| 245 | |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 246 | /* |
| 247 | * The NL80211_REGDOM_SET_BY_USER regdom alpha2 is cached, this lets |
| 248 | * you know if a valid regulatory hint with NL80211_REGDOM_SET_BY_USER |
| 249 | * has ever been issued. |
| 250 | */ |
| 251 | static bool is_user_regdom_saved(void) |
| 252 | { |
| 253 | if (user_alpha2[0] == '9' && user_alpha2[1] == '7') |
| 254 | return false; |
| 255 | |
| 256 | /* This would indicate a mistake on the design */ |
| 257 | if (WARN((!is_world_regdom(user_alpha2) && |
| 258 | !is_an_alpha2(user_alpha2)), |
| 259 | "Unexpected user alpha2: %c%c\n", |
| 260 | user_alpha2[0], |
| 261 | user_alpha2[1])) |
| 262 | return false; |
| 263 | |
| 264 | return true; |
| 265 | } |
| 266 | |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 267 | static int reg_copy_regd(const struct ieee80211_regdomain **dst_regd, |
| 268 | const struct ieee80211_regdomain *src_regd) |
| 269 | { |
| 270 | struct ieee80211_regdomain *regd; |
| 271 | int size_of_regd = 0; |
| 272 | unsigned int i; |
| 273 | |
| 274 | size_of_regd = sizeof(struct ieee80211_regdomain) + |
| 275 | ((src_regd->n_reg_rules + 1) * sizeof(struct ieee80211_reg_rule)); |
| 276 | |
| 277 | regd = kzalloc(size_of_regd, GFP_KERNEL); |
| 278 | if (!regd) |
| 279 | return -ENOMEM; |
| 280 | |
| 281 | memcpy(regd, src_regd, sizeof(struct ieee80211_regdomain)); |
| 282 | |
| 283 | for (i = 0; i < src_regd->n_reg_rules; i++) |
| 284 | memcpy(®d->reg_rules[i], &src_regd->reg_rules[i], |
| 285 | sizeof(struct ieee80211_reg_rule)); |
| 286 | |
| 287 | *dst_regd = regd; |
| 288 | return 0; |
| 289 | } |
| 290 | |
| 291 | #ifdef CONFIG_CFG80211_INTERNAL_REGDB |
| 292 | struct reg_regdb_search_request { |
| 293 | char alpha2[2]; |
| 294 | struct list_head list; |
| 295 | }; |
| 296 | |
| 297 | static LIST_HEAD(reg_regdb_search_list); |
John W. Linville | 368d06f | 2010-03-16 15:40:59 -0400 | [diff] [blame] | 298 | static DEFINE_MUTEX(reg_regdb_search_mutex); |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 299 | |
| 300 | static void reg_regdb_search(struct work_struct *work) |
| 301 | { |
| 302 | struct reg_regdb_search_request *request; |
| 303 | const struct ieee80211_regdomain *curdom, *regdom; |
| 304 | int i, r; |
| 305 | |
John W. Linville | 368d06f | 2010-03-16 15:40:59 -0400 | [diff] [blame] | 306 | mutex_lock(®_regdb_search_mutex); |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 307 | while (!list_empty(®_regdb_search_list)) { |
| 308 | request = list_first_entry(®_regdb_search_list, |
| 309 | struct reg_regdb_search_request, |
| 310 | list); |
| 311 | list_del(&request->list); |
| 312 | |
| 313 | for (i=0; i<reg_regdb_size; i++) { |
| 314 | curdom = reg_regdb[i]; |
| 315 | |
| 316 | if (!memcmp(request->alpha2, curdom->alpha2, 2)) { |
| 317 | r = reg_copy_regd(®dom, curdom); |
| 318 | if (r) |
| 319 | break; |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 320 | mutex_lock(&cfg80211_mutex); |
| 321 | set_regdom(regdom); |
| 322 | mutex_unlock(&cfg80211_mutex); |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 323 | break; |
| 324 | } |
| 325 | } |
| 326 | |
| 327 | kfree(request); |
| 328 | } |
John W. Linville | 368d06f | 2010-03-16 15:40:59 -0400 | [diff] [blame] | 329 | mutex_unlock(®_regdb_search_mutex); |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 330 | } |
| 331 | |
| 332 | static DECLARE_WORK(reg_regdb_work, reg_regdb_search); |
| 333 | |
| 334 | static void reg_regdb_query(const char *alpha2) |
| 335 | { |
| 336 | struct reg_regdb_search_request *request; |
| 337 | |
| 338 | if (!alpha2) |
| 339 | return; |
| 340 | |
| 341 | request = kzalloc(sizeof(struct reg_regdb_search_request), GFP_KERNEL); |
| 342 | if (!request) |
| 343 | return; |
| 344 | |
| 345 | memcpy(request->alpha2, alpha2, 2); |
| 346 | |
John W. Linville | 368d06f | 2010-03-16 15:40:59 -0400 | [diff] [blame] | 347 | mutex_lock(®_regdb_search_mutex); |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 348 | list_add_tail(&request->list, ®_regdb_search_list); |
John W. Linville | 368d06f | 2010-03-16 15:40:59 -0400 | [diff] [blame] | 349 | mutex_unlock(®_regdb_search_mutex); |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 350 | |
| 351 | schedule_work(®_regdb_work); |
| 352 | } |
| 353 | #else |
| 354 | static inline void reg_regdb_query(const char *alpha2) {} |
| 355 | #endif /* CONFIG_CFG80211_INTERNAL_REGDB */ |
| 356 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 357 | /* |
| 358 | * This lets us keep regulatory code which is updated on a regulatory |
| 359 | * basis in userspace. |
| 360 | */ |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 361 | static int call_crda(const char *alpha2) |
| 362 | { |
| 363 | char country_env[9 + 2] = "COUNTRY="; |
| 364 | char *envp[] = { |
| 365 | country_env, |
| 366 | NULL |
| 367 | }; |
| 368 | |
| 369 | if (!is_world_regdom((char *) alpha2)) |
| 370 | printk(KERN_INFO "cfg80211: Calling CRDA for country: %c%c\n", |
| 371 | alpha2[0], alpha2[1]); |
| 372 | else |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 373 | printk(KERN_INFO "cfg80211: Calling CRDA to update world " |
| 374 | "regulatory domain\n"); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 375 | |
John W. Linville | 3b377ea | 2009-12-18 17:59:01 -0500 | [diff] [blame] | 376 | /* query internal regulatory database (if it exists) */ |
| 377 | reg_regdb_query(alpha2); |
| 378 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 379 | country_env[8] = alpha2[0]; |
| 380 | country_env[9] = alpha2[1]; |
| 381 | |
| 382 | return kobject_uevent_env(®_pdev->dev.kobj, KOBJ_CHANGE, envp); |
| 383 | } |
| 384 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 385 | /* Used by nl80211 before kmalloc'ing our regulatory domain */ |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 386 | bool reg_is_valid_request(const char *alpha2) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 387 | { |
Luis R. Rodriguez | 61405e9 | 2009-05-13 17:04:41 -0400 | [diff] [blame] | 388 | assert_cfg80211_lock(); |
| 389 | |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 390 | if (!last_request) |
| 391 | return false; |
| 392 | |
| 393 | return alpha2_equal(last_request->alpha2, alpha2); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 394 | } |
| 395 | |
| 396 | /* Sanity check on a regulatory rule */ |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 397 | static bool is_valid_reg_rule(const struct ieee80211_reg_rule *rule) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 398 | { |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 399 | const struct ieee80211_freq_range *freq_range = &rule->freq_range; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 400 | u32 freq_diff; |
| 401 | |
Luis R. Rodriguez | 91e9900 | 2008-11-12 14:21:55 -0800 | [diff] [blame] | 402 | if (freq_range->start_freq_khz <= 0 || freq_range->end_freq_khz <= 0) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 403 | return false; |
| 404 | |
| 405 | if (freq_range->start_freq_khz > freq_range->end_freq_khz) |
| 406 | return false; |
| 407 | |
| 408 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; |
| 409 | |
Roel Kluin | bd05f28 | 2009-03-03 22:55:21 +0100 | [diff] [blame] | 410 | if (freq_range->end_freq_khz <= freq_range->start_freq_khz || |
| 411 | freq_range->max_bandwidth_khz > freq_diff) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 412 | return false; |
| 413 | |
| 414 | return true; |
| 415 | } |
| 416 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 417 | static bool is_valid_rd(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 418 | { |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 419 | const struct ieee80211_reg_rule *reg_rule = NULL; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 420 | unsigned int i; |
| 421 | |
| 422 | if (!rd->n_reg_rules) |
| 423 | return false; |
| 424 | |
Luis R. Rodriguez | 88dc1c3 | 2008-11-12 14:22:01 -0800 | [diff] [blame] | 425 | if (WARN_ON(rd->n_reg_rules > NL80211_MAX_SUPP_REG_RULES)) |
| 426 | return false; |
| 427 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 428 | for (i = 0; i < rd->n_reg_rules; i++) { |
| 429 | reg_rule = &rd->reg_rules[i]; |
| 430 | if (!is_valid_reg_rule(reg_rule)) |
| 431 | return false; |
| 432 | } |
| 433 | |
| 434 | return true; |
| 435 | } |
| 436 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 437 | static bool reg_does_bw_fit(const struct ieee80211_freq_range *freq_range, |
| 438 | u32 center_freq_khz, |
| 439 | u32 bw_khz) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 440 | { |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 441 | u32 start_freq_khz, end_freq_khz; |
| 442 | |
| 443 | start_freq_khz = center_freq_khz - (bw_khz/2); |
| 444 | end_freq_khz = center_freq_khz + (bw_khz/2); |
| 445 | |
| 446 | if (start_freq_khz >= freq_range->start_freq_khz && |
| 447 | end_freq_khz <= freq_range->end_freq_khz) |
| 448 | return true; |
| 449 | |
| 450 | return false; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 451 | } |
| 452 | |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 453 | /** |
| 454 | * freq_in_rule_band - tells us if a frequency is in a frequency band |
| 455 | * @freq_range: frequency rule we want to query |
| 456 | * @freq_khz: frequency we are inquiring about |
| 457 | * |
| 458 | * This lets us know if a specific frequency rule is or is not relevant to |
| 459 | * a specific frequency's band. Bands are device specific and artificial |
| 460 | * definitions (the "2.4 GHz band" and the "5 GHz band"), however it is |
| 461 | * safe for now to assume that a frequency rule should not be part of a |
| 462 | * frequency's band if the start freq or end freq are off by more than 2 GHz. |
| 463 | * This resolution can be lowered and should be considered as we add |
| 464 | * regulatory rule support for other "bands". |
| 465 | **/ |
| 466 | static bool freq_in_rule_band(const struct ieee80211_freq_range *freq_range, |
| 467 | u32 freq_khz) |
| 468 | { |
| 469 | #define ONE_GHZ_IN_KHZ 1000000 |
| 470 | if (abs(freq_khz - freq_range->start_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) |
| 471 | return true; |
| 472 | if (abs(freq_khz - freq_range->end_freq_khz) <= (2 * ONE_GHZ_IN_KHZ)) |
| 473 | return true; |
| 474 | return false; |
| 475 | #undef ONE_GHZ_IN_KHZ |
| 476 | } |
| 477 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 478 | /* |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 479 | * Helper for regdom_intersect(), this does the real |
| 480 | * mathematical intersection fun |
| 481 | */ |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 482 | static int reg_rules_intersect( |
| 483 | const struct ieee80211_reg_rule *rule1, |
| 484 | const struct ieee80211_reg_rule *rule2, |
| 485 | struct ieee80211_reg_rule *intersected_rule) |
| 486 | { |
| 487 | const struct ieee80211_freq_range *freq_range1, *freq_range2; |
| 488 | struct ieee80211_freq_range *freq_range; |
| 489 | const struct ieee80211_power_rule *power_rule1, *power_rule2; |
| 490 | struct ieee80211_power_rule *power_rule; |
| 491 | u32 freq_diff; |
| 492 | |
| 493 | freq_range1 = &rule1->freq_range; |
| 494 | freq_range2 = &rule2->freq_range; |
| 495 | freq_range = &intersected_rule->freq_range; |
| 496 | |
| 497 | power_rule1 = &rule1->power_rule; |
| 498 | power_rule2 = &rule2->power_rule; |
| 499 | power_rule = &intersected_rule->power_rule; |
| 500 | |
| 501 | freq_range->start_freq_khz = max(freq_range1->start_freq_khz, |
| 502 | freq_range2->start_freq_khz); |
| 503 | freq_range->end_freq_khz = min(freq_range1->end_freq_khz, |
| 504 | freq_range2->end_freq_khz); |
| 505 | freq_range->max_bandwidth_khz = min(freq_range1->max_bandwidth_khz, |
| 506 | freq_range2->max_bandwidth_khz); |
| 507 | |
| 508 | freq_diff = freq_range->end_freq_khz - freq_range->start_freq_khz; |
| 509 | if (freq_range->max_bandwidth_khz > freq_diff) |
| 510 | freq_range->max_bandwidth_khz = freq_diff; |
| 511 | |
| 512 | power_rule->max_eirp = min(power_rule1->max_eirp, |
| 513 | power_rule2->max_eirp); |
| 514 | power_rule->max_antenna_gain = min(power_rule1->max_antenna_gain, |
| 515 | power_rule2->max_antenna_gain); |
| 516 | |
| 517 | intersected_rule->flags = (rule1->flags | rule2->flags); |
| 518 | |
| 519 | if (!is_valid_reg_rule(intersected_rule)) |
| 520 | return -EINVAL; |
| 521 | |
| 522 | return 0; |
| 523 | } |
| 524 | |
| 525 | /** |
| 526 | * regdom_intersect - do the intersection between two regulatory domains |
| 527 | * @rd1: first regulatory domain |
| 528 | * @rd2: second regulatory domain |
| 529 | * |
| 530 | * Use this function to get the intersection between two regulatory domains. |
| 531 | * Once completed we will mark the alpha2 for the rd as intersected, "98", |
| 532 | * as no one single alpha2 can represent this regulatory domain. |
| 533 | * |
| 534 | * Returns a pointer to the regulatory domain structure which will hold the |
| 535 | * resulting intersection of rules between rd1 and rd2. We will |
| 536 | * kzalloc() this structure for you. |
| 537 | */ |
| 538 | static struct ieee80211_regdomain *regdom_intersect( |
| 539 | const struct ieee80211_regdomain *rd1, |
| 540 | const struct ieee80211_regdomain *rd2) |
| 541 | { |
| 542 | int r, size_of_regd; |
| 543 | unsigned int x, y; |
| 544 | unsigned int num_rules = 0, rule_idx = 0; |
| 545 | const struct ieee80211_reg_rule *rule1, *rule2; |
| 546 | struct ieee80211_reg_rule *intersected_rule; |
| 547 | struct ieee80211_regdomain *rd; |
| 548 | /* This is just a dummy holder to help us count */ |
| 549 | struct ieee80211_reg_rule irule; |
| 550 | |
| 551 | /* Uses the stack temporarily for counter arithmetic */ |
| 552 | intersected_rule = &irule; |
| 553 | |
| 554 | memset(intersected_rule, 0, sizeof(struct ieee80211_reg_rule)); |
| 555 | |
| 556 | if (!rd1 || !rd2) |
| 557 | return NULL; |
| 558 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 559 | /* |
| 560 | * First we get a count of the rules we'll need, then we actually |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 561 | * build them. This is to so we can malloc() and free() a |
| 562 | * regdomain once. The reason we use reg_rules_intersect() here |
| 563 | * is it will return -EINVAL if the rule computed makes no sense. |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 564 | * All rules that do check out OK are valid. |
| 565 | */ |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 566 | |
| 567 | for (x = 0; x < rd1->n_reg_rules; x++) { |
| 568 | rule1 = &rd1->reg_rules[x]; |
| 569 | for (y = 0; y < rd2->n_reg_rules; y++) { |
| 570 | rule2 = &rd2->reg_rules[y]; |
| 571 | if (!reg_rules_intersect(rule1, rule2, |
| 572 | intersected_rule)) |
| 573 | num_rules++; |
| 574 | memset(intersected_rule, 0, |
| 575 | sizeof(struct ieee80211_reg_rule)); |
| 576 | } |
| 577 | } |
| 578 | |
| 579 | if (!num_rules) |
| 580 | return NULL; |
| 581 | |
| 582 | size_of_regd = sizeof(struct ieee80211_regdomain) + |
| 583 | ((num_rules + 1) * sizeof(struct ieee80211_reg_rule)); |
| 584 | |
| 585 | rd = kzalloc(size_of_regd, GFP_KERNEL); |
| 586 | if (!rd) |
| 587 | return NULL; |
| 588 | |
| 589 | for (x = 0; x < rd1->n_reg_rules; x++) { |
| 590 | rule1 = &rd1->reg_rules[x]; |
| 591 | for (y = 0; y < rd2->n_reg_rules; y++) { |
| 592 | rule2 = &rd2->reg_rules[y]; |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 593 | /* |
| 594 | * This time around instead of using the stack lets |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 595 | * write to the target rule directly saving ourselves |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 596 | * a memcpy() |
| 597 | */ |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 598 | intersected_rule = &rd->reg_rules[rule_idx]; |
| 599 | r = reg_rules_intersect(rule1, rule2, |
| 600 | intersected_rule); |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 601 | /* |
| 602 | * No need to memset here the intersected rule here as |
| 603 | * we're not using the stack anymore |
| 604 | */ |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 605 | if (r) |
| 606 | continue; |
| 607 | rule_idx++; |
| 608 | } |
| 609 | } |
| 610 | |
| 611 | if (rule_idx != num_rules) { |
| 612 | kfree(rd); |
| 613 | return NULL; |
| 614 | } |
| 615 | |
| 616 | rd->n_reg_rules = num_rules; |
| 617 | rd->alpha2[0] = '9'; |
| 618 | rd->alpha2[1] = '8'; |
| 619 | |
| 620 | return rd; |
| 621 | } |
| 622 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 623 | /* |
| 624 | * XXX: add support for the rest of enum nl80211_reg_rule_flags, we may |
| 625 | * want to just have the channel structure use these |
| 626 | */ |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 627 | static u32 map_regdom_flags(u32 rd_flags) |
| 628 | { |
| 629 | u32 channel_flags = 0; |
| 630 | if (rd_flags & NL80211_RRF_PASSIVE_SCAN) |
| 631 | channel_flags |= IEEE80211_CHAN_PASSIVE_SCAN; |
| 632 | if (rd_flags & NL80211_RRF_NO_IBSS) |
| 633 | channel_flags |= IEEE80211_CHAN_NO_IBSS; |
| 634 | if (rd_flags & NL80211_RRF_DFS) |
| 635 | channel_flags |= IEEE80211_CHAN_RADAR; |
| 636 | return channel_flags; |
| 637 | } |
| 638 | |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 639 | static int freq_reg_info_regd(struct wiphy *wiphy, |
| 640 | u32 center_freq, |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 641 | u32 desired_bw_khz, |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 642 | const struct ieee80211_reg_rule **reg_rule, |
| 643 | const struct ieee80211_regdomain *custom_regd) |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 644 | { |
| 645 | int i; |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 646 | bool band_rule_found = false; |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 647 | const struct ieee80211_regdomain *regd; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 648 | bool bw_fits = false; |
| 649 | |
| 650 | if (!desired_bw_khz) |
| 651 | desired_bw_khz = MHZ_TO_KHZ(20); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 652 | |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 653 | regd = custom_regd ? custom_regd : cfg80211_regdomain; |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 654 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 655 | /* |
| 656 | * Follow the driver's regulatory domain, if present, unless a country |
| 657 | * IE has been processed or a user wants to help complaince further |
| 658 | */ |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 659 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
| 660 | last_request->initiator != NL80211_REGDOM_SET_BY_USER && |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 661 | wiphy->regd) |
| 662 | regd = wiphy->regd; |
| 663 | |
| 664 | if (!regd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 665 | return -EINVAL; |
| 666 | |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 667 | for (i = 0; i < regd->n_reg_rules; i++) { |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 668 | const struct ieee80211_reg_rule *rr; |
| 669 | const struct ieee80211_freq_range *fr = NULL; |
| 670 | const struct ieee80211_power_rule *pr = NULL; |
| 671 | |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 672 | rr = ®d->reg_rules[i]; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 673 | fr = &rr->freq_range; |
| 674 | pr = &rr->power_rule; |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 675 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 676 | /* |
| 677 | * We only need to know if one frequency rule was |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 678 | * was in center_freq's band, that's enough, so lets |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 679 | * not overwrite it once found |
| 680 | */ |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 681 | if (!band_rule_found) |
| 682 | band_rule_found = freq_in_rule_band(fr, center_freq); |
| 683 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 684 | bw_fits = reg_does_bw_fit(fr, |
| 685 | center_freq, |
| 686 | desired_bw_khz); |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 687 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 688 | if (band_rule_found && bw_fits) { |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 689 | *reg_rule = rr; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 690 | return 0; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 691 | } |
| 692 | } |
| 693 | |
Luis R. Rodriguez | 0c7dc45 | 2009-01-07 17:43:36 -0800 | [diff] [blame] | 694 | if (!band_rule_found) |
| 695 | return -ERANGE; |
| 696 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 697 | return -EINVAL; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 698 | } |
| 699 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 700 | int freq_reg_info(struct wiphy *wiphy, |
| 701 | u32 center_freq, |
| 702 | u32 desired_bw_khz, |
| 703 | const struct ieee80211_reg_rule **reg_rule) |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 704 | { |
Luis R. Rodriguez | ac46d48 | 2009-05-01 18:44:50 -0400 | [diff] [blame] | 705 | assert_cfg80211_lock(); |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 706 | return freq_reg_info_regd(wiphy, |
| 707 | center_freq, |
| 708 | desired_bw_khz, |
| 709 | reg_rule, |
| 710 | NULL); |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 711 | } |
John W. Linville | 4f366c5 | 2010-07-15 14:57:33 -0400 | [diff] [blame] | 712 | EXPORT_SYMBOL(freq_reg_info); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 713 | |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame^] | 714 | #ifdef CONFIG_CFG80211_REG_DEBUG |
| 715 | static const char *reg_initiator_name(enum nl80211_reg_initiator initiator) |
| 716 | { |
| 717 | switch (initiator) { |
| 718 | case NL80211_REGDOM_SET_BY_CORE: |
| 719 | return "Set by core"; |
| 720 | case NL80211_REGDOM_SET_BY_USER: |
| 721 | return "Set by user"; |
| 722 | case NL80211_REGDOM_SET_BY_DRIVER: |
| 723 | return "Set by driver"; |
| 724 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
| 725 | return "Set by country IE"; |
| 726 | default: |
| 727 | WARN_ON(1); |
| 728 | return "Set by bug"; |
| 729 | } |
| 730 | } |
| 731 | #endif |
| 732 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 733 | /* |
| 734 | * Note that right now we assume the desired channel bandwidth |
| 735 | * is always 20 MHz for each individual channel (HT40 uses 20 MHz |
| 736 | * per channel, the primary and the extension channel). To support |
| 737 | * smaller custom bandwidths such as 5 MHz or 10 MHz we'll need a |
| 738 | * new ieee80211_channel.target_bw and re run the regulatory check |
| 739 | * on the wiphy with the target_bw specified. Then we can simply use |
| 740 | * that below for the desired_bw_khz below. |
| 741 | */ |
Luis R. Rodriguez | 7ca43d0 | 2010-10-20 10:18:53 -0700 | [diff] [blame] | 742 | static void handle_channel(struct wiphy *wiphy, |
| 743 | enum nl80211_reg_initiator initiator, |
| 744 | enum ieee80211_band band, |
Luis R. Rodriguez | a92a3ce | 2009-01-07 17:43:33 -0800 | [diff] [blame] | 745 | unsigned int chan_idx) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 746 | { |
| 747 | int r; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 748 | u32 flags, bw_flags = 0; |
| 749 | u32 desired_bw_khz = MHZ_TO_KHZ(20); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 750 | const struct ieee80211_reg_rule *reg_rule = NULL; |
| 751 | const struct ieee80211_power_rule *power_rule = NULL; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 752 | const struct ieee80211_freq_range *freq_range = NULL; |
Luis R. Rodriguez | a92a3ce | 2009-01-07 17:43:33 -0800 | [diff] [blame] | 753 | struct ieee80211_supported_band *sband; |
| 754 | struct ieee80211_channel *chan; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 755 | struct wiphy *request_wiphy = NULL; |
Luis R. Rodriguez | a92a3ce | 2009-01-07 17:43:33 -0800 | [diff] [blame] | 756 | |
Luis R. Rodriguez | 761cf7e | 2009-02-21 00:04:25 -0500 | [diff] [blame] | 757 | assert_cfg80211_lock(); |
| 758 | |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 759 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
| 760 | |
Luis R. Rodriguez | a92a3ce | 2009-01-07 17:43:33 -0800 | [diff] [blame] | 761 | sband = wiphy->bands[band]; |
| 762 | BUG_ON(chan_idx >= sband->n_channels); |
| 763 | chan = &sband->channels[chan_idx]; |
| 764 | |
| 765 | flags = chan->orig_flags; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 766 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 767 | r = freq_reg_info(wiphy, |
| 768 | MHZ_TO_KHZ(chan->center_freq), |
| 769 | desired_bw_khz, |
| 770 | ®_rule); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 771 | |
Luis R. Rodriguez | ca4ffe8 | 2010-10-20 10:18:55 -0700 | [diff] [blame] | 772 | if (r) { |
| 773 | /* |
| 774 | * We will disable all channels that do not match our |
| 775 | * recieved regulatory rule unless the hint is coming |
| 776 | * from a Country IE and the Country IE had no information |
| 777 | * about a band. The IEEE 802.11 spec allows for an AP |
| 778 | * to send only a subset of the regulatory rules allowed, |
| 779 | * so an AP in the US that only supports 2.4 GHz may only send |
| 780 | * a country IE with information for the 2.4 GHz band |
| 781 | * while 5 GHz is still supported. |
| 782 | */ |
| 783 | if (initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE && |
| 784 | r == -ERANGE) |
| 785 | return; |
| 786 | |
| 787 | REG_DBG_PRINT("cfg80211: Disabling freq %d MHz\n", |
| 788 | chan->center_freq); |
| 789 | chan->flags = IEEE80211_CHAN_DISABLED; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 790 | return; |
Luis R. Rodriguez | ca4ffe8 | 2010-10-20 10:18:55 -0700 | [diff] [blame] | 791 | } |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 792 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 793 | power_rule = ®_rule->power_rule; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 794 | freq_range = ®_rule->freq_range; |
| 795 | |
| 796 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) |
| 797 | bw_flags = IEEE80211_CHAN_NO_HT40; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 798 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 799 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 800 | request_wiphy && request_wiphy == wiphy && |
Johannes Berg | 5be83de | 2009-11-19 00:56:28 +0100 | [diff] [blame] | 801 | request_wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) { |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 802 | /* |
| 803 | * This gaurantees the driver's requested regulatory domain |
Luis R. Rodriguez | f976376 | 2009-01-22 15:05:52 -0800 | [diff] [blame] | 804 | * will always be used as a base for further regulatory |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 805 | * settings |
| 806 | */ |
Luis R. Rodriguez | f976376 | 2009-01-22 15:05:52 -0800 | [diff] [blame] | 807 | chan->flags = chan->orig_flags = |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 808 | map_regdom_flags(reg_rule->flags) | bw_flags; |
Luis R. Rodriguez | f976376 | 2009-01-22 15:05:52 -0800 | [diff] [blame] | 809 | chan->max_antenna_gain = chan->orig_mag = |
| 810 | (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
Luis R. Rodriguez | f976376 | 2009-01-22 15:05:52 -0800 | [diff] [blame] | 811 | chan->max_power = chan->orig_mpwr = |
| 812 | (int) MBM_TO_DBM(power_rule->max_eirp); |
| 813 | return; |
| 814 | } |
| 815 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 816 | chan->flags = flags | bw_flags | map_regdom_flags(reg_rule->flags); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 817 | chan->max_antenna_gain = min(chan->orig_mag, |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 818 | (int) MBI_TO_DBI(power_rule->max_antenna_gain)); |
John W. Linville | 253898c | 2008-04-03 15:32:54 -0400 | [diff] [blame] | 819 | if (chan->orig_mpwr) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 820 | chan->max_power = min(chan->orig_mpwr, |
| 821 | (int) MBM_TO_DBM(power_rule->max_eirp)); |
John W. Linville | 253898c | 2008-04-03 15:32:54 -0400 | [diff] [blame] | 822 | else |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 823 | chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 824 | } |
| 825 | |
Luis R. Rodriguez | 7ca43d0 | 2010-10-20 10:18:53 -0700 | [diff] [blame] | 826 | static void handle_band(struct wiphy *wiphy, |
| 827 | enum ieee80211_band band, |
| 828 | enum nl80211_reg_initiator initiator) |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 829 | { |
Luis R. Rodriguez | a92a3ce | 2009-01-07 17:43:33 -0800 | [diff] [blame] | 830 | unsigned int i; |
| 831 | struct ieee80211_supported_band *sband; |
| 832 | |
| 833 | BUG_ON(!wiphy->bands[band]); |
| 834 | sband = wiphy->bands[band]; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 835 | |
| 836 | for (i = 0; i < sband->n_channels; i++) |
Luis R. Rodriguez | 7ca43d0 | 2010-10-20 10:18:53 -0700 | [diff] [blame] | 837 | handle_channel(wiphy, initiator, band, i); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 838 | } |
| 839 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 840 | static bool ignore_reg_update(struct wiphy *wiphy, |
| 841 | enum nl80211_reg_initiator initiator) |
Luis R. Rodriguez | 14b9815 | 2008-11-12 14:22:03 -0800 | [diff] [blame] | 842 | { |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame^] | 843 | if (!last_request) { |
| 844 | REG_DBG_PRINT("cfg80211: Ignoring regulatory request %s since " |
| 845 | "last_request is not set\n", |
| 846 | reg_initiator_name(initiator)); |
Luis R. Rodriguez | 14b9815 | 2008-11-12 14:22:03 -0800 | [diff] [blame] | 847 | return true; |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame^] | 848 | } |
| 849 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 850 | if (initiator == NL80211_REGDOM_SET_BY_CORE && |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame^] | 851 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { |
| 852 | REG_DBG_PRINT("cfg80211: Ignoring regulatory request %s " |
| 853 | "since the driver uses its own custom " |
| 854 | "regulatory domain ", |
| 855 | reg_initiator_name(initiator)); |
Luis R. Rodriguez | 14b9815 | 2008-11-12 14:22:03 -0800 | [diff] [blame] | 856 | return true; |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame^] | 857 | } |
| 858 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 859 | /* |
| 860 | * wiphy->regd will be set once the device has its own |
| 861 | * desired regulatory domain set |
| 862 | */ |
Johannes Berg | 5be83de | 2009-11-19 00:56:28 +0100 | [diff] [blame] | 863 | if (wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY && !wiphy->regd && |
Luis R. Rodriguez | 749b527 | 2010-10-20 10:18:54 -0700 | [diff] [blame] | 864 | initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame^] | 865 | !is_world_regdom(last_request->alpha2)) { |
| 866 | REG_DBG_PRINT("cfg80211: Ignoring regulatory request %s " |
| 867 | "since the driver requires its own regulaotry " |
| 868 | "domain to be set first", |
| 869 | reg_initiator_name(initiator)); |
Luis R. Rodriguez | 14b9815 | 2008-11-12 14:22:03 -0800 | [diff] [blame] | 870 | return true; |
Luis R. Rodriguez | 926a0a0 | 2010-10-21 19:17:03 +0530 | [diff] [blame^] | 871 | } |
| 872 | |
Luis R. Rodriguez | 14b9815 | 2008-11-12 14:22:03 -0800 | [diff] [blame] | 873 | return false; |
| 874 | } |
| 875 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 876 | static void update_all_wiphy_regulatory(enum nl80211_reg_initiator initiator) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 877 | { |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 878 | struct cfg80211_registered_device *rdev; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 879 | |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 880 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
| 881 | wiphy_update_regulatory(&rdev->wiphy, initiator); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 882 | } |
| 883 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 884 | static void handle_reg_beacon(struct wiphy *wiphy, |
| 885 | unsigned int chan_idx, |
| 886 | struct reg_beacon *reg_beacon) |
| 887 | { |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 888 | struct ieee80211_supported_band *sband; |
| 889 | struct ieee80211_channel *chan; |
Luis R. Rodriguez | 6bad876 | 2009-04-02 14:08:09 -0400 | [diff] [blame] | 890 | bool channel_changed = false; |
| 891 | struct ieee80211_channel chan_before; |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 892 | |
| 893 | assert_cfg80211_lock(); |
| 894 | |
| 895 | sband = wiphy->bands[reg_beacon->chan.band]; |
| 896 | chan = &sband->channels[chan_idx]; |
| 897 | |
| 898 | if (likely(chan->center_freq != reg_beacon->chan.center_freq)) |
| 899 | return; |
| 900 | |
Luis R. Rodriguez | 6bad876 | 2009-04-02 14:08:09 -0400 | [diff] [blame] | 901 | if (chan->beacon_found) |
| 902 | return; |
| 903 | |
| 904 | chan->beacon_found = true; |
| 905 | |
Johannes Berg | 5be83de | 2009-11-19 00:56:28 +0100 | [diff] [blame] | 906 | if (wiphy->flags & WIPHY_FLAG_DISABLE_BEACON_HINTS) |
Luis R. Rodriguez | 3718424 | 2009-07-30 17:43:48 -0700 | [diff] [blame] | 907 | return; |
| 908 | |
Luis R. Rodriguez | 6bad876 | 2009-04-02 14:08:09 -0400 | [diff] [blame] | 909 | chan_before.center_freq = chan->center_freq; |
| 910 | chan_before.flags = chan->flags; |
| 911 | |
Luis R. Rodriguez | 3718424 | 2009-07-30 17:43:48 -0700 | [diff] [blame] | 912 | if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN) { |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 913 | chan->flags &= ~IEEE80211_CHAN_PASSIVE_SCAN; |
Luis R. Rodriguez | 6bad876 | 2009-04-02 14:08:09 -0400 | [diff] [blame] | 914 | channel_changed = true; |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 915 | } |
| 916 | |
Luis R. Rodriguez | 3718424 | 2009-07-30 17:43:48 -0700 | [diff] [blame] | 917 | if (chan->flags & IEEE80211_CHAN_NO_IBSS) { |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 918 | chan->flags &= ~IEEE80211_CHAN_NO_IBSS; |
Luis R. Rodriguez | 6bad876 | 2009-04-02 14:08:09 -0400 | [diff] [blame] | 919 | channel_changed = true; |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 920 | } |
| 921 | |
Luis R. Rodriguez | 6bad876 | 2009-04-02 14:08:09 -0400 | [diff] [blame] | 922 | if (channel_changed) |
| 923 | nl80211_send_beacon_hint_event(wiphy, &chan_before, chan); |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 924 | } |
| 925 | |
| 926 | /* |
| 927 | * Called when a scan on a wiphy finds a beacon on |
| 928 | * new channel |
| 929 | */ |
| 930 | static void wiphy_update_new_beacon(struct wiphy *wiphy, |
| 931 | struct reg_beacon *reg_beacon) |
| 932 | { |
| 933 | unsigned int i; |
| 934 | struct ieee80211_supported_band *sband; |
| 935 | |
| 936 | assert_cfg80211_lock(); |
| 937 | |
| 938 | if (!wiphy->bands[reg_beacon->chan.band]) |
| 939 | return; |
| 940 | |
| 941 | sband = wiphy->bands[reg_beacon->chan.band]; |
| 942 | |
| 943 | for (i = 0; i < sband->n_channels; i++) |
| 944 | handle_reg_beacon(wiphy, i, reg_beacon); |
| 945 | } |
| 946 | |
| 947 | /* |
| 948 | * Called upon reg changes or a new wiphy is added |
| 949 | */ |
| 950 | static void wiphy_update_beacon_reg(struct wiphy *wiphy) |
| 951 | { |
| 952 | unsigned int i; |
| 953 | struct ieee80211_supported_band *sband; |
| 954 | struct reg_beacon *reg_beacon; |
| 955 | |
| 956 | assert_cfg80211_lock(); |
| 957 | |
| 958 | if (list_empty(®_beacon_list)) |
| 959 | return; |
| 960 | |
| 961 | list_for_each_entry(reg_beacon, ®_beacon_list, list) { |
| 962 | if (!wiphy->bands[reg_beacon->chan.band]) |
| 963 | continue; |
| 964 | sband = wiphy->bands[reg_beacon->chan.band]; |
| 965 | for (i = 0; i < sband->n_channels; i++) |
| 966 | handle_reg_beacon(wiphy, i, reg_beacon); |
| 967 | } |
| 968 | } |
| 969 | |
| 970 | static bool reg_is_world_roaming(struct wiphy *wiphy) |
| 971 | { |
| 972 | if (is_world_regdom(cfg80211_regdomain->alpha2) || |
| 973 | (wiphy->regd && is_world_regdom(wiphy->regd->alpha2))) |
| 974 | return true; |
Luis R. Rodriguez | b1ed8dd | 2009-05-02 00:34:15 -0400 | [diff] [blame] | 975 | if (last_request && |
| 976 | last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE && |
Johannes Berg | 5be83de | 2009-11-19 00:56:28 +0100 | [diff] [blame] | 977 | wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 978 | return true; |
| 979 | return false; |
| 980 | } |
| 981 | |
| 982 | /* Reap the advantages of previously found beacons */ |
| 983 | static void reg_process_beacons(struct wiphy *wiphy) |
| 984 | { |
Luis R. Rodriguez | b1ed8dd | 2009-05-02 00:34:15 -0400 | [diff] [blame] | 985 | /* |
| 986 | * Means we are just firing up cfg80211, so no beacons would |
| 987 | * have been processed yet. |
| 988 | */ |
| 989 | if (!last_request) |
| 990 | return; |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 991 | if (!reg_is_world_roaming(wiphy)) |
| 992 | return; |
| 993 | wiphy_update_beacon_reg(wiphy); |
| 994 | } |
| 995 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 996 | static bool is_ht40_not_allowed(struct ieee80211_channel *chan) |
| 997 | { |
| 998 | if (!chan) |
| 999 | return true; |
| 1000 | if (chan->flags & IEEE80211_CHAN_DISABLED) |
| 1001 | return true; |
| 1002 | /* This would happen when regulatory rules disallow HT40 completely */ |
| 1003 | if (IEEE80211_CHAN_NO_HT40 == (chan->flags & (IEEE80211_CHAN_NO_HT40))) |
| 1004 | return true; |
| 1005 | return false; |
| 1006 | } |
| 1007 | |
| 1008 | static void reg_process_ht_flags_channel(struct wiphy *wiphy, |
| 1009 | enum ieee80211_band band, |
| 1010 | unsigned int chan_idx) |
| 1011 | { |
| 1012 | struct ieee80211_supported_band *sband; |
| 1013 | struct ieee80211_channel *channel; |
| 1014 | struct ieee80211_channel *channel_before = NULL, *channel_after = NULL; |
| 1015 | unsigned int i; |
| 1016 | |
| 1017 | assert_cfg80211_lock(); |
| 1018 | |
| 1019 | sband = wiphy->bands[band]; |
| 1020 | BUG_ON(chan_idx >= sband->n_channels); |
| 1021 | channel = &sband->channels[chan_idx]; |
| 1022 | |
| 1023 | if (is_ht40_not_allowed(channel)) { |
| 1024 | channel->flags |= IEEE80211_CHAN_NO_HT40; |
| 1025 | return; |
| 1026 | } |
| 1027 | |
| 1028 | /* |
| 1029 | * We need to ensure the extension channels exist to |
| 1030 | * be able to use HT40- or HT40+, this finds them (or not) |
| 1031 | */ |
| 1032 | for (i = 0; i < sband->n_channels; i++) { |
| 1033 | struct ieee80211_channel *c = &sband->channels[i]; |
| 1034 | if (c->center_freq == (channel->center_freq - 20)) |
| 1035 | channel_before = c; |
| 1036 | if (c->center_freq == (channel->center_freq + 20)) |
| 1037 | channel_after = c; |
| 1038 | } |
| 1039 | |
| 1040 | /* |
| 1041 | * Please note that this assumes target bandwidth is 20 MHz, |
| 1042 | * if that ever changes we also need to change the below logic |
| 1043 | * to include that as well. |
| 1044 | */ |
| 1045 | if (is_ht40_not_allowed(channel_before)) |
Luis R. Rodriguez | 689da1b | 2009-05-02 00:37:18 -0400 | [diff] [blame] | 1046 | channel->flags |= IEEE80211_CHAN_NO_HT40MINUS; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1047 | else |
Luis R. Rodriguez | 689da1b | 2009-05-02 00:37:18 -0400 | [diff] [blame] | 1048 | channel->flags &= ~IEEE80211_CHAN_NO_HT40MINUS; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1049 | |
| 1050 | if (is_ht40_not_allowed(channel_after)) |
Luis R. Rodriguez | 689da1b | 2009-05-02 00:37:18 -0400 | [diff] [blame] | 1051 | channel->flags |= IEEE80211_CHAN_NO_HT40PLUS; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1052 | else |
Luis R. Rodriguez | 689da1b | 2009-05-02 00:37:18 -0400 | [diff] [blame] | 1053 | channel->flags &= ~IEEE80211_CHAN_NO_HT40PLUS; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1054 | } |
| 1055 | |
| 1056 | static void reg_process_ht_flags_band(struct wiphy *wiphy, |
| 1057 | enum ieee80211_band band) |
| 1058 | { |
| 1059 | unsigned int i; |
| 1060 | struct ieee80211_supported_band *sband; |
| 1061 | |
| 1062 | BUG_ON(!wiphy->bands[band]); |
| 1063 | sband = wiphy->bands[band]; |
| 1064 | |
| 1065 | for (i = 0; i < sband->n_channels; i++) |
| 1066 | reg_process_ht_flags_channel(wiphy, band, i); |
| 1067 | } |
| 1068 | |
| 1069 | static void reg_process_ht_flags(struct wiphy *wiphy) |
| 1070 | { |
| 1071 | enum ieee80211_band band; |
| 1072 | |
| 1073 | if (!wiphy) |
| 1074 | return; |
| 1075 | |
| 1076 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
| 1077 | if (wiphy->bands[band]) |
| 1078 | reg_process_ht_flags_band(wiphy, band); |
| 1079 | } |
| 1080 | |
| 1081 | } |
| 1082 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1083 | void wiphy_update_regulatory(struct wiphy *wiphy, |
| 1084 | enum nl80211_reg_initiator initiator) |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 1085 | { |
| 1086 | enum ieee80211_band band; |
Luis R. Rodriguez | d46e5b1 | 2009-01-22 15:05:50 -0800 | [diff] [blame] | 1087 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1088 | if (ignore_reg_update(wiphy, initiator)) |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1089 | goto out; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1090 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 1091 | if (wiphy->bands[band]) |
Luis R. Rodriguez | 7ca43d0 | 2010-10-20 10:18:53 -0700 | [diff] [blame] | 1092 | handle_band(wiphy, band, initiator); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1093 | } |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1094 | out: |
| 1095 | reg_process_beacons(wiphy); |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1096 | reg_process_ht_flags(wiphy); |
Luis R. Rodriguez | 560e28e | 2009-01-07 17:43:32 -0800 | [diff] [blame] | 1097 | if (wiphy->reg_notifier) |
Luis R. Rodriguez | 716f939 | 2009-01-22 15:05:51 -0800 | [diff] [blame] | 1098 | wiphy->reg_notifier(wiphy, last_request); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1099 | } |
| 1100 | |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1101 | static void handle_channel_custom(struct wiphy *wiphy, |
| 1102 | enum ieee80211_band band, |
| 1103 | unsigned int chan_idx, |
| 1104 | const struct ieee80211_regdomain *regd) |
| 1105 | { |
| 1106 | int r; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1107 | u32 desired_bw_khz = MHZ_TO_KHZ(20); |
| 1108 | u32 bw_flags = 0; |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1109 | const struct ieee80211_reg_rule *reg_rule = NULL; |
| 1110 | const struct ieee80211_power_rule *power_rule = NULL; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1111 | const struct ieee80211_freq_range *freq_range = NULL; |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1112 | struct ieee80211_supported_band *sband; |
| 1113 | struct ieee80211_channel *chan; |
| 1114 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1115 | assert_reg_lock(); |
Luis R. Rodriguez | ac46d48 | 2009-05-01 18:44:50 -0400 | [diff] [blame] | 1116 | |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1117 | sband = wiphy->bands[band]; |
| 1118 | BUG_ON(chan_idx >= sband->n_channels); |
| 1119 | chan = &sband->channels[chan_idx]; |
| 1120 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1121 | r = freq_reg_info_regd(wiphy, |
| 1122 | MHZ_TO_KHZ(chan->center_freq), |
| 1123 | desired_bw_khz, |
| 1124 | ®_rule, |
| 1125 | regd); |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1126 | |
| 1127 | if (r) { |
| 1128 | chan->flags = IEEE80211_CHAN_DISABLED; |
| 1129 | return; |
| 1130 | } |
| 1131 | |
| 1132 | power_rule = ®_rule->power_rule; |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1133 | freq_range = ®_rule->freq_range; |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1134 | |
Luis R. Rodriguez | 038659e | 2009-05-02 00:37:17 -0400 | [diff] [blame] | 1135 | if (freq_range->max_bandwidth_khz < MHZ_TO_KHZ(40)) |
| 1136 | bw_flags = IEEE80211_CHAN_NO_HT40; |
| 1137 | |
| 1138 | chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags; |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1139 | chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain); |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1140 | chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp); |
| 1141 | } |
| 1142 | |
| 1143 | static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band, |
| 1144 | const struct ieee80211_regdomain *regd) |
| 1145 | { |
| 1146 | unsigned int i; |
| 1147 | struct ieee80211_supported_band *sband; |
| 1148 | |
| 1149 | BUG_ON(!wiphy->bands[band]); |
| 1150 | sband = wiphy->bands[band]; |
| 1151 | |
| 1152 | for (i = 0; i < sband->n_channels; i++) |
| 1153 | handle_channel_custom(wiphy, band, i, regd); |
| 1154 | } |
| 1155 | |
| 1156 | /* Used by drivers prior to wiphy registration */ |
| 1157 | void wiphy_apply_custom_regulatory(struct wiphy *wiphy, |
| 1158 | const struct ieee80211_regdomain *regd) |
| 1159 | { |
| 1160 | enum ieee80211_band band; |
Luis R. Rodriguez | bbcf3f0 | 2009-05-19 17:49:47 -0400 | [diff] [blame] | 1161 | unsigned int bands_set = 0; |
Luis R. Rodriguez | ac46d48 | 2009-05-01 18:44:50 -0400 | [diff] [blame] | 1162 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1163 | mutex_lock(®_mutex); |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1164 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
Luis R. Rodriguez | bbcf3f0 | 2009-05-19 17:49:47 -0400 | [diff] [blame] | 1165 | if (!wiphy->bands[band]) |
| 1166 | continue; |
| 1167 | handle_band_custom(wiphy, band, regd); |
| 1168 | bands_set++; |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1169 | } |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1170 | mutex_unlock(®_mutex); |
Luis R. Rodriguez | bbcf3f0 | 2009-05-19 17:49:47 -0400 | [diff] [blame] | 1171 | |
| 1172 | /* |
| 1173 | * no point in calling this if it won't have any effect |
| 1174 | * on your device's supportd bands. |
| 1175 | */ |
| 1176 | WARN_ON(!bands_set); |
Luis R. Rodriguez | 1fa25e4 | 2009-01-22 15:05:44 -0800 | [diff] [blame] | 1177 | } |
| 1178 | EXPORT_SYMBOL(wiphy_apply_custom_regulatory); |
| 1179 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1180 | /* |
| 1181 | * Return value which can be used by ignore_request() to indicate |
| 1182 | * it has been determined we should intersect two regulatory domains |
| 1183 | */ |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 1184 | #define REG_INTERSECT 1 |
| 1185 | |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1186 | /* This has the logic which determines when a new request |
| 1187 | * should be ignored. */ |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1188 | static int ignore_request(struct wiphy *wiphy, |
| 1189 | struct regulatory_request *pending_request) |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1190 | { |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 1191 | struct wiphy *last_wiphy = NULL; |
Luis R. Rodriguez | 761cf7e | 2009-02-21 00:04:25 -0500 | [diff] [blame] | 1192 | |
| 1193 | assert_cfg80211_lock(); |
| 1194 | |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1195 | /* All initial requests are respected */ |
| 1196 | if (!last_request) |
| 1197 | return 0; |
| 1198 | |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1199 | switch (pending_request->initiator) { |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1200 | case NL80211_REGDOM_SET_BY_CORE: |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1201 | return 0; |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1202 | case NL80211_REGDOM_SET_BY_COUNTRY_IE: |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 1203 | |
| 1204 | last_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
| 1205 | |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1206 | if (unlikely(!is_an_alpha2(pending_request->alpha2))) |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1207 | return -EINVAL; |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1208 | if (last_request->initiator == |
| 1209 | NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 1210 | if (last_wiphy != wiphy) { |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1211 | /* |
| 1212 | * Two cards with two APs claiming different |
Thadeu Lima de Souza Cascardo | 1fe90b0 | 2009-08-11 11:18:42 -0300 | [diff] [blame] | 1213 | * Country IE alpha2s. We could |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1214 | * intersect them, but that seems unlikely |
| 1215 | * to be correct. Reject second one for now. |
| 1216 | */ |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1217 | if (regdom_changes(pending_request->alpha2)) |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1218 | return -EOPNOTSUPP; |
| 1219 | return -EALREADY; |
| 1220 | } |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1221 | /* |
| 1222 | * Two consecutive Country IE hints on the same wiphy. |
| 1223 | * This should be picked up early by the driver/stack |
| 1224 | */ |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1225 | if (WARN_ON(regdom_changes(pending_request->alpha2))) |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1226 | return 0; |
| 1227 | return -EALREADY; |
| 1228 | } |
Luis R. Rodriguez | a171fba | 2010-10-18 17:44:51 -0700 | [diff] [blame] | 1229 | return 0; |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1230 | case NL80211_REGDOM_SET_BY_DRIVER: |
| 1231 | if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE) { |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1232 | if (regdom_changes(pending_request->alpha2)) |
Luis R. Rodriguez | e74b1e7 | 2009-01-22 15:05:48 -0800 | [diff] [blame] | 1233 | return 0; |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1234 | return -EALREADY; |
Luis R. Rodriguez | e74b1e7 | 2009-01-22 15:05:48 -0800 | [diff] [blame] | 1235 | } |
Luis R. Rodriguez | fff32c0 | 2009-02-21 00:04:32 -0500 | [diff] [blame] | 1236 | |
| 1237 | /* |
| 1238 | * This would happen if you unplug and plug your card |
| 1239 | * back in or if you add a new device for which the previously |
| 1240 | * loaded card also agrees on the regulatory domain. |
| 1241 | */ |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1242 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1243 | !regdom_changes(pending_request->alpha2)) |
Luis R. Rodriguez | fff32c0 | 2009-02-21 00:04:32 -0500 | [diff] [blame] | 1244 | return -EALREADY; |
| 1245 | |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1246 | return REG_INTERSECT; |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1247 | case NL80211_REGDOM_SET_BY_USER: |
| 1248 | if (last_request->initiator == NL80211_REGDOM_SET_BY_COUNTRY_IE) |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 1249 | return REG_INTERSECT; |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1250 | /* |
| 1251 | * If the user knows better the user should set the regdom |
| 1252 | * to their country before the IE is picked up |
| 1253 | */ |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1254 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER && |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1255 | last_request->intersect) |
| 1256 | return -EOPNOTSUPP; |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1257 | /* |
| 1258 | * Process user requests only after previous user/driver/core |
| 1259 | * requests have been processed |
| 1260 | */ |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1261 | if (last_request->initiator == NL80211_REGDOM_SET_BY_CORE || |
| 1262 | last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER || |
| 1263 | last_request->initiator == NL80211_REGDOM_SET_BY_USER) { |
Luis R. Rodriguez | 69b1572 | 2009-02-21 00:04:33 -0500 | [diff] [blame] | 1264 | if (regdom_changes(last_request->alpha2)) |
Luis R. Rodriguez | 5eebade | 2009-01-22 15:05:47 -0800 | [diff] [blame] | 1265 | return -EAGAIN; |
| 1266 | } |
| 1267 | |
John W. Linville | baeb66f | 2009-12-18 17:59:02 -0500 | [diff] [blame] | 1268 | if (!regdom_changes(pending_request->alpha2)) |
Luis R. Rodriguez | e74b1e7 | 2009-01-22 15:05:48 -0800 | [diff] [blame] | 1269 | return -EALREADY; |
| 1270 | |
Johannes Berg | 84fa4f4 | 2008-10-24 20:32:23 +0200 | [diff] [blame] | 1271 | return 0; |
| 1272 | } |
| 1273 | |
| 1274 | return -EINVAL; |
| 1275 | } |
| 1276 | |
Luis R. Rodriguez | d1c96a9 | 2009-02-21 00:24:13 -0500 | [diff] [blame] | 1277 | /** |
| 1278 | * __regulatory_hint - hint to the wireless core a regulatory domain |
| 1279 | * @wiphy: if the hint comes from country information from an AP, this |
| 1280 | * is required to be set to the wiphy that received the information |
Luis R. Rodriguez | 28da32d | 2009-02-21 00:24:14 -0500 | [diff] [blame] | 1281 | * @pending_request: the regulatory request currently being processed |
Luis R. Rodriguez | d1c96a9 | 2009-02-21 00:24:13 -0500 | [diff] [blame] | 1282 | * |
| 1283 | * The Wireless subsystem can use this function to hint to the wireless core |
Luis R. Rodriguez | 28da32d | 2009-02-21 00:24:14 -0500 | [diff] [blame] | 1284 | * what it believes should be the current regulatory domain. |
Luis R. Rodriguez | d1c96a9 | 2009-02-21 00:24:13 -0500 | [diff] [blame] | 1285 | * |
| 1286 | * Returns zero if all went fine, %-EALREADY if a regulatory domain had |
| 1287 | * already been set or other standard error codes. |
| 1288 | * |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1289 | * Caller must hold &cfg80211_mutex and ®_mutex |
Luis R. Rodriguez | d1c96a9 | 2009-02-21 00:24:13 -0500 | [diff] [blame] | 1290 | */ |
Luis R. Rodriguez | 28da32d | 2009-02-21 00:24:14 -0500 | [diff] [blame] | 1291 | static int __regulatory_hint(struct wiphy *wiphy, |
| 1292 | struct regulatory_request *pending_request) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1293 | { |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 1294 | bool intersect = false; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1295 | int r = 0; |
| 1296 | |
Luis R. Rodriguez | 761cf7e | 2009-02-21 00:04:25 -0500 | [diff] [blame] | 1297 | assert_cfg80211_lock(); |
| 1298 | |
Luis R. Rodriguez | 2f92cd2 | 2009-02-21 00:24:16 -0500 | [diff] [blame] | 1299 | r = ignore_request(wiphy, pending_request); |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 1300 | |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1301 | if (r == REG_INTERSECT) { |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1302 | if (pending_request->initiator == |
| 1303 | NL80211_REGDOM_SET_BY_DRIVER) { |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1304 | r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1305 | if (r) { |
| 1306 | kfree(pending_request); |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1307 | return r; |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1308 | } |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1309 | } |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 1310 | intersect = true; |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1311 | } else if (r) { |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1312 | /* |
| 1313 | * If the regulatory domain being requested by the |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1314 | * driver has already been set just copy it to the |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1315 | * wiphy |
| 1316 | */ |
Luis R. Rodriguez | 28da32d | 2009-02-21 00:24:14 -0500 | [diff] [blame] | 1317 | if (r == -EALREADY && |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1318 | pending_request->initiator == |
| 1319 | NL80211_REGDOM_SET_BY_DRIVER) { |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1320 | r = reg_copy_regd(&wiphy->regd, cfg80211_regdomain); |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1321 | if (r) { |
| 1322 | kfree(pending_request); |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1323 | return r; |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1324 | } |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1325 | r = -EALREADY; |
| 1326 | goto new_request; |
| 1327 | } |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1328 | kfree(pending_request); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1329 | return r; |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1330 | } |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1331 | |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1332 | new_request: |
Luis R. Rodriguez | 5203cdb | 2008-11-12 14:21:56 -0800 | [diff] [blame] | 1333 | kfree(last_request); |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1334 | |
| 1335 | last_request = pending_request; |
| 1336 | last_request->intersect = intersect; |
| 1337 | |
| 1338 | pending_request = NULL; |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1339 | |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1340 | if (last_request->initiator == NL80211_REGDOM_SET_BY_USER) { |
| 1341 | user_alpha2[0] = last_request->alpha2[0]; |
| 1342 | user_alpha2[1] = last_request->alpha2[1]; |
| 1343 | } |
| 1344 | |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1345 | /* When r == REG_INTERSECT we do need to call CRDA */ |
Luis R. Rodriguez | 73d54c9 | 2009-03-09 22:07:42 -0400 | [diff] [blame] | 1346 | if (r < 0) { |
| 1347 | /* |
| 1348 | * Since CRDA will not be called in this case as we already |
| 1349 | * have applied the requested regulatory domain before we just |
| 1350 | * inform userspace we have processed the request |
| 1351 | */ |
| 1352 | if (r == -EALREADY) |
| 1353 | nl80211_send_reg_change_event(last_request); |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1354 | return r; |
Luis R. Rodriguez | 73d54c9 | 2009-03-09 22:07:42 -0400 | [diff] [blame] | 1355 | } |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1356 | |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1357 | return call_crda(last_request->alpha2); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1358 | } |
| 1359 | |
Luis R. Rodriguez | 30a548c | 2009-05-02 01:17:27 -0400 | [diff] [blame] | 1360 | /* This processes *all* regulatory hints */ |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1361 | static void reg_process_hint(struct regulatory_request *reg_request) |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1362 | { |
| 1363 | int r = 0; |
| 1364 | struct wiphy *wiphy = NULL; |
Yuri Ershov | c4c3229 | 2010-06-29 15:08:08 +0400 | [diff] [blame] | 1365 | enum nl80211_reg_initiator initiator = reg_request->initiator; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1366 | |
| 1367 | BUG_ON(!reg_request->alpha2); |
| 1368 | |
| 1369 | mutex_lock(&cfg80211_mutex); |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1370 | mutex_lock(®_mutex); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1371 | |
| 1372 | if (wiphy_idx_valid(reg_request->wiphy_idx)) |
| 1373 | wiphy = wiphy_idx_to_wiphy(reg_request->wiphy_idx); |
| 1374 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1375 | if (reg_request->initiator == NL80211_REGDOM_SET_BY_DRIVER && |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1376 | !wiphy) { |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1377 | kfree(reg_request); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1378 | goto out; |
| 1379 | } |
| 1380 | |
Luis R. Rodriguez | 28da32d | 2009-02-21 00:24:14 -0500 | [diff] [blame] | 1381 | r = __regulatory_hint(wiphy, reg_request); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1382 | /* This is required so that the orig_* parameters are saved */ |
Johannes Berg | 5be83de | 2009-11-19 00:56:28 +0100 | [diff] [blame] | 1383 | if (r == -EALREADY && wiphy && |
| 1384 | wiphy->flags & WIPHY_FLAG_STRICT_REGULATORY) |
Yuri Ershov | c4c3229 | 2010-06-29 15:08:08 +0400 | [diff] [blame] | 1385 | wiphy_update_regulatory(wiphy, initiator); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1386 | out: |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1387 | mutex_unlock(®_mutex); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1388 | mutex_unlock(&cfg80211_mutex); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1389 | } |
| 1390 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1391 | /* Processes regulatory hints, this is all the NL80211_REGDOM_SET_BY_* */ |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1392 | static void reg_process_pending_hints(void) |
| 1393 | { |
| 1394 | struct regulatory_request *reg_request; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1395 | |
| 1396 | spin_lock(®_requests_lock); |
| 1397 | while (!list_empty(®_requests_list)) { |
| 1398 | reg_request = list_first_entry(®_requests_list, |
| 1399 | struct regulatory_request, |
| 1400 | list); |
| 1401 | list_del_init(®_request->list); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1402 | |
Luis R. Rodriguez | d951c1d | 2009-02-21 00:24:15 -0500 | [diff] [blame] | 1403 | spin_unlock(®_requests_lock); |
| 1404 | reg_process_hint(reg_request); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1405 | spin_lock(®_requests_lock); |
| 1406 | } |
| 1407 | spin_unlock(®_requests_lock); |
| 1408 | } |
| 1409 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1410 | /* Processes beacon hints -- this has nothing to do with country IEs */ |
| 1411 | static void reg_process_pending_beacon_hints(void) |
| 1412 | { |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 1413 | struct cfg80211_registered_device *rdev; |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1414 | struct reg_beacon *pending_beacon, *tmp; |
| 1415 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1416 | /* |
| 1417 | * No need to hold the reg_mutex here as we just touch wiphys |
| 1418 | * and do not read or access regulatory variables. |
| 1419 | */ |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1420 | mutex_lock(&cfg80211_mutex); |
| 1421 | |
| 1422 | /* This goes through the _pending_ beacon list */ |
| 1423 | spin_lock_bh(®_pending_beacons_lock); |
| 1424 | |
| 1425 | if (list_empty(®_pending_beacons)) { |
| 1426 | spin_unlock_bh(®_pending_beacons_lock); |
| 1427 | goto out; |
| 1428 | } |
| 1429 | |
| 1430 | list_for_each_entry_safe(pending_beacon, tmp, |
| 1431 | ®_pending_beacons, list) { |
| 1432 | |
| 1433 | list_del_init(&pending_beacon->list); |
| 1434 | |
| 1435 | /* Applies the beacon hint to current wiphys */ |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 1436 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) |
| 1437 | wiphy_update_new_beacon(&rdev->wiphy, pending_beacon); |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1438 | |
| 1439 | /* Remembers the beacon hint for new wiphys or reg changes */ |
| 1440 | list_add_tail(&pending_beacon->list, ®_beacon_list); |
| 1441 | } |
| 1442 | |
| 1443 | spin_unlock_bh(®_pending_beacons_lock); |
| 1444 | out: |
| 1445 | mutex_unlock(&cfg80211_mutex); |
| 1446 | } |
| 1447 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1448 | static void reg_todo(struct work_struct *work) |
| 1449 | { |
| 1450 | reg_process_pending_hints(); |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1451 | reg_process_pending_beacon_hints(); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1452 | } |
| 1453 | |
| 1454 | static DECLARE_WORK(reg_work, reg_todo); |
| 1455 | |
| 1456 | static void queue_regulatory_request(struct regulatory_request *request) |
| 1457 | { |
John W. Linville | c61029c | 2010-08-05 14:26:24 -0400 | [diff] [blame] | 1458 | if (isalpha(request->alpha2[0])) |
| 1459 | request->alpha2[0] = toupper(request->alpha2[0]); |
| 1460 | if (isalpha(request->alpha2[1])) |
| 1461 | request->alpha2[1] = toupper(request->alpha2[1]); |
| 1462 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1463 | spin_lock(®_requests_lock); |
| 1464 | list_add_tail(&request->list, ®_requests_list); |
| 1465 | spin_unlock(®_requests_lock); |
| 1466 | |
| 1467 | schedule_work(®_work); |
| 1468 | } |
| 1469 | |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1470 | /* |
| 1471 | * Core regulatory hint -- happens during cfg80211_init() |
| 1472 | * and when we restore regulatory settings. |
| 1473 | */ |
Luis R. Rodriguez | ba25c14 | 2009-02-21 00:04:23 -0500 | [diff] [blame] | 1474 | static int regulatory_hint_core(const char *alpha2) |
| 1475 | { |
| 1476 | struct regulatory_request *request; |
| 1477 | |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1478 | kfree(last_request); |
| 1479 | last_request = NULL; |
Luis R. Rodriguez | ba25c14 | 2009-02-21 00:04:23 -0500 | [diff] [blame] | 1480 | |
| 1481 | request = kzalloc(sizeof(struct regulatory_request), |
| 1482 | GFP_KERNEL); |
| 1483 | if (!request) |
| 1484 | return -ENOMEM; |
| 1485 | |
| 1486 | request->alpha2[0] = alpha2[0]; |
| 1487 | request->alpha2[1] = alpha2[1]; |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1488 | request->initiator = NL80211_REGDOM_SET_BY_CORE; |
Luis R. Rodriguez | ba25c14 | 2009-02-21 00:04:23 -0500 | [diff] [blame] | 1489 | |
Luis R. Rodriguez | 5078b2e | 2009-05-13 17:04:42 -0400 | [diff] [blame] | 1490 | /* |
| 1491 | * This ensures last_request is populated once modules |
| 1492 | * come swinging in and calling regulatory hints and |
| 1493 | * wiphy_apply_custom_regulatory(). |
| 1494 | */ |
Luis R. Rodriguez | a2bff26 | 2010-01-29 19:58:56 -0500 | [diff] [blame] | 1495 | reg_process_hint(request); |
Luis R. Rodriguez | 5078b2e | 2009-05-13 17:04:42 -0400 | [diff] [blame] | 1496 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1497 | return 0; |
Luis R. Rodriguez | ba25c14 | 2009-02-21 00:04:23 -0500 | [diff] [blame] | 1498 | } |
| 1499 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1500 | /* User hints */ |
| 1501 | int regulatory_hint_user(const char *alpha2) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1502 | { |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1503 | struct regulatory_request *request; |
| 1504 | |
Johannes Berg | be3d481 | 2008-10-24 20:32:21 +0200 | [diff] [blame] | 1505 | BUG_ON(!alpha2); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1506 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1507 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
| 1508 | if (!request) |
| 1509 | return -ENOMEM; |
| 1510 | |
| 1511 | request->wiphy_idx = WIPHY_IDX_STALE; |
| 1512 | request->alpha2[0] = alpha2[0]; |
| 1513 | request->alpha2[1] = alpha2[1]; |
Luis R. Rodriguez | e12822e | 2010-01-04 11:37:39 -0500 | [diff] [blame] | 1514 | request->initiator = NL80211_REGDOM_SET_BY_USER; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1515 | |
| 1516 | queue_regulatory_request(request); |
| 1517 | |
| 1518 | return 0; |
| 1519 | } |
| 1520 | |
| 1521 | /* Driver hints */ |
| 1522 | int regulatory_hint(struct wiphy *wiphy, const char *alpha2) |
| 1523 | { |
| 1524 | struct regulatory_request *request; |
| 1525 | |
| 1526 | BUG_ON(!alpha2); |
| 1527 | BUG_ON(!wiphy); |
| 1528 | |
| 1529 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
| 1530 | if (!request) |
| 1531 | return -ENOMEM; |
| 1532 | |
| 1533 | request->wiphy_idx = get_wiphy_idx(wiphy); |
| 1534 | |
| 1535 | /* Must have registered wiphy first */ |
| 1536 | BUG_ON(!wiphy_idx_valid(request->wiphy_idx)); |
| 1537 | |
| 1538 | request->alpha2[0] = alpha2[0]; |
| 1539 | request->alpha2[1] = alpha2[1]; |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1540 | request->initiator = NL80211_REGDOM_SET_BY_DRIVER; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1541 | |
| 1542 | queue_regulatory_request(request); |
| 1543 | |
| 1544 | return 0; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1545 | } |
| 1546 | EXPORT_SYMBOL(regulatory_hint); |
| 1547 | |
Luis R. Rodriguez | 4b44c8b | 2009-07-30 17:38:07 -0700 | [diff] [blame] | 1548 | /* |
| 1549 | * We hold wdev_lock() here so we cannot hold cfg80211_mutex() and |
| 1550 | * therefore cannot iterate over the rdev list here. |
| 1551 | */ |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1552 | void regulatory_hint_11d(struct wiphy *wiphy, |
Luis R. Rodriguez | 84920e3 | 2010-01-14 20:08:20 -0500 | [diff] [blame] | 1553 | enum ieee80211_band band, |
| 1554 | u8 *country_ie, |
| 1555 | u8 country_ie_len) |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1556 | { |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1557 | char alpha2[2]; |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1558 | enum environment_cap env = ENVIRON_ANY; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1559 | struct regulatory_request *request; |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1560 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1561 | mutex_lock(®_mutex); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1562 | |
Luis R. Rodriguez | 9828b01 | 2009-07-30 17:38:06 -0700 | [diff] [blame] | 1563 | if (unlikely(!last_request)) |
| 1564 | goto out; |
Luis R. Rodriguez | d335fe6 | 2009-02-21 00:04:27 -0500 | [diff] [blame] | 1565 | |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1566 | /* IE len must be evenly divisible by 2 */ |
| 1567 | if (country_ie_len & 0x01) |
| 1568 | goto out; |
| 1569 | |
| 1570 | if (country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) |
| 1571 | goto out; |
| 1572 | |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1573 | alpha2[0] = country_ie[0]; |
| 1574 | alpha2[1] = country_ie[1]; |
| 1575 | |
| 1576 | if (country_ie[2] == 'I') |
| 1577 | env = ENVIRON_INDOOR; |
| 1578 | else if (country_ie[2] == 'O') |
| 1579 | env = ENVIRON_OUTDOOR; |
| 1580 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1581 | /* |
Luis R. Rodriguez | 8b19e6c | 2009-07-30 17:38:09 -0700 | [diff] [blame] | 1582 | * We will run this only upon a successful connection on cfg80211. |
Luis R. Rodriguez | 4b44c8b | 2009-07-30 17:38:07 -0700 | [diff] [blame] | 1583 | * We leave conflict resolution to the workqueue, where can hold |
| 1584 | * cfg80211_mutex. |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1585 | */ |
Luis R. Rodriguez | cc0b6fe | 2009-03-20 23:53:05 -0400 | [diff] [blame] | 1586 | if (likely(last_request->initiator == |
| 1587 | NL80211_REGDOM_SET_BY_COUNTRY_IE && |
Luis R. Rodriguez | 4b44c8b | 2009-07-30 17:38:07 -0700 | [diff] [blame] | 1588 | wiphy_idx_valid(last_request->wiphy_idx))) |
| 1589 | goto out; |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1590 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1591 | request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL); |
| 1592 | if (!request) |
Dan Carpenter | f9f9b6e | 2010-07-22 13:26:50 +0200 | [diff] [blame] | 1593 | goto out; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1594 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1595 | request->wiphy_idx = get_wiphy_idx(wiphy); |
John W. Linville | 4f366c5 | 2010-07-15 14:57:33 -0400 | [diff] [blame] | 1596 | request->alpha2[0] = alpha2[0]; |
| 1597 | request->alpha2[1] = alpha2[1]; |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1598 | request->initiator = NL80211_REGDOM_SET_BY_COUNTRY_IE; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1599 | request->country_ie_env = env; |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1600 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1601 | mutex_unlock(®_mutex); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 1602 | |
| 1603 | queue_regulatory_request(request); |
| 1604 | |
| 1605 | return; |
Luis R. Rodriguez | 0441d6f | 2009-02-21 00:04:29 -0500 | [diff] [blame] | 1606 | |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1607 | out: |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 1608 | mutex_unlock(®_mutex); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1609 | } |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1610 | |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 1611 | static void restore_alpha2(char *alpha2, bool reset_user) |
| 1612 | { |
| 1613 | /* indicates there is no alpha2 to consider for restoration */ |
| 1614 | alpha2[0] = '9'; |
| 1615 | alpha2[1] = '7'; |
| 1616 | |
| 1617 | /* The user setting has precedence over the module parameter */ |
| 1618 | if (is_user_regdom_saved()) { |
| 1619 | /* Unless we're asked to ignore it and reset it */ |
| 1620 | if (reset_user) { |
| 1621 | REG_DBG_PRINT("cfg80211: Restoring regulatory settings " |
| 1622 | "including user preference\n"); |
| 1623 | user_alpha2[0] = '9'; |
| 1624 | user_alpha2[1] = '7'; |
| 1625 | |
| 1626 | /* |
| 1627 | * If we're ignoring user settings, we still need to |
| 1628 | * check the module parameter to ensure we put things |
| 1629 | * back as they were for a full restore. |
| 1630 | */ |
| 1631 | if (!is_world_regdom(ieee80211_regdom)) { |
| 1632 | REG_DBG_PRINT("cfg80211: Keeping preference on " |
| 1633 | "module parameter ieee80211_regdom: %c%c\n", |
| 1634 | ieee80211_regdom[0], |
| 1635 | ieee80211_regdom[1]); |
| 1636 | alpha2[0] = ieee80211_regdom[0]; |
| 1637 | alpha2[1] = ieee80211_regdom[1]; |
| 1638 | } |
| 1639 | } else { |
| 1640 | REG_DBG_PRINT("cfg80211: Restoring regulatory settings " |
| 1641 | "while preserving user preference for: %c%c\n", |
| 1642 | user_alpha2[0], |
| 1643 | user_alpha2[1]); |
| 1644 | alpha2[0] = user_alpha2[0]; |
| 1645 | alpha2[1] = user_alpha2[1]; |
| 1646 | } |
| 1647 | } else if (!is_world_regdom(ieee80211_regdom)) { |
| 1648 | REG_DBG_PRINT("cfg80211: Keeping preference on " |
| 1649 | "module parameter ieee80211_regdom: %c%c\n", |
| 1650 | ieee80211_regdom[0], |
| 1651 | ieee80211_regdom[1]); |
| 1652 | alpha2[0] = ieee80211_regdom[0]; |
| 1653 | alpha2[1] = ieee80211_regdom[1]; |
| 1654 | } else |
| 1655 | REG_DBG_PRINT("cfg80211: Restoring regulatory settings\n"); |
| 1656 | } |
| 1657 | |
| 1658 | /* |
| 1659 | * Restoring regulatory settings involves ingoring any |
| 1660 | * possibly stale country IE information and user regulatory |
| 1661 | * settings if so desired, this includes any beacon hints |
| 1662 | * learned as we could have traveled outside to another country |
| 1663 | * after disconnection. To restore regulatory settings we do |
| 1664 | * exactly what we did at bootup: |
| 1665 | * |
| 1666 | * - send a core regulatory hint |
| 1667 | * - send a user regulatory hint if applicable |
| 1668 | * |
| 1669 | * Device drivers that send a regulatory hint for a specific country |
| 1670 | * keep their own regulatory domain on wiphy->regd so that does does |
| 1671 | * not need to be remembered. |
| 1672 | */ |
| 1673 | static void restore_regulatory_settings(bool reset_user) |
| 1674 | { |
| 1675 | char alpha2[2]; |
| 1676 | struct reg_beacon *reg_beacon, *btmp; |
| 1677 | |
| 1678 | mutex_lock(&cfg80211_mutex); |
| 1679 | mutex_lock(®_mutex); |
| 1680 | |
| 1681 | reset_regdomains(); |
| 1682 | restore_alpha2(alpha2, reset_user); |
| 1683 | |
| 1684 | /* Clear beacon hints */ |
| 1685 | spin_lock_bh(®_pending_beacons_lock); |
| 1686 | if (!list_empty(®_pending_beacons)) { |
| 1687 | list_for_each_entry_safe(reg_beacon, btmp, |
| 1688 | ®_pending_beacons, list) { |
| 1689 | list_del(®_beacon->list); |
| 1690 | kfree(reg_beacon); |
| 1691 | } |
| 1692 | } |
| 1693 | spin_unlock_bh(®_pending_beacons_lock); |
| 1694 | |
| 1695 | if (!list_empty(®_beacon_list)) { |
| 1696 | list_for_each_entry_safe(reg_beacon, btmp, |
| 1697 | ®_beacon_list, list) { |
| 1698 | list_del(®_beacon->list); |
| 1699 | kfree(reg_beacon); |
| 1700 | } |
| 1701 | } |
| 1702 | |
| 1703 | /* First restore to the basic regulatory settings */ |
| 1704 | cfg80211_regdomain = cfg80211_world_regdom; |
| 1705 | |
| 1706 | mutex_unlock(®_mutex); |
| 1707 | mutex_unlock(&cfg80211_mutex); |
| 1708 | |
| 1709 | regulatory_hint_core(cfg80211_regdomain->alpha2); |
| 1710 | |
| 1711 | /* |
| 1712 | * This restores the ieee80211_regdom module parameter |
| 1713 | * preference or the last user requested regulatory |
| 1714 | * settings, user regulatory settings takes precedence. |
| 1715 | */ |
| 1716 | if (is_an_alpha2(alpha2)) |
| 1717 | regulatory_hint_user(user_alpha2); |
| 1718 | } |
| 1719 | |
| 1720 | |
| 1721 | void regulatory_hint_disconnect(void) |
| 1722 | { |
| 1723 | REG_DBG_PRINT("cfg80211: All devices are disconnected, going to " |
| 1724 | "restore regulatory settings\n"); |
| 1725 | restore_regulatory_settings(false); |
| 1726 | } |
| 1727 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1728 | static bool freq_is_chan_12_13_14(u16 freq) |
| 1729 | { |
| 1730 | if (freq == ieee80211_channel_to_frequency(12) || |
| 1731 | freq == ieee80211_channel_to_frequency(13) || |
| 1732 | freq == ieee80211_channel_to_frequency(14)) |
| 1733 | return true; |
| 1734 | return false; |
| 1735 | } |
| 1736 | |
| 1737 | int regulatory_hint_found_beacon(struct wiphy *wiphy, |
| 1738 | struct ieee80211_channel *beacon_chan, |
| 1739 | gfp_t gfp) |
| 1740 | { |
| 1741 | struct reg_beacon *reg_beacon; |
| 1742 | |
| 1743 | if (likely((beacon_chan->beacon_found || |
| 1744 | (beacon_chan->flags & IEEE80211_CHAN_RADAR) || |
| 1745 | (beacon_chan->band == IEEE80211_BAND_2GHZ && |
| 1746 | !freq_is_chan_12_13_14(beacon_chan->center_freq))))) |
| 1747 | return 0; |
| 1748 | |
| 1749 | reg_beacon = kzalloc(sizeof(struct reg_beacon), gfp); |
| 1750 | if (!reg_beacon) |
| 1751 | return -ENOMEM; |
| 1752 | |
Luis R. Rodriguez | 4113f75 | 2010-01-04 11:50:11 -0500 | [diff] [blame] | 1753 | REG_DBG_PRINT("cfg80211: Found new beacon on " |
| 1754 | "frequency: %d MHz (Ch %d) on %s\n", |
| 1755 | beacon_chan->center_freq, |
| 1756 | ieee80211_frequency_to_channel(beacon_chan->center_freq), |
| 1757 | wiphy_name(wiphy)); |
| 1758 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 1759 | memcpy(®_beacon->chan, beacon_chan, |
| 1760 | sizeof(struct ieee80211_channel)); |
| 1761 | |
| 1762 | |
| 1763 | /* |
| 1764 | * Since we can be called from BH or and non-BH context |
| 1765 | * we must use spin_lock_bh() |
| 1766 | */ |
| 1767 | spin_lock_bh(®_pending_beacons_lock); |
| 1768 | list_add_tail(®_beacon->list, ®_pending_beacons); |
| 1769 | spin_unlock_bh(®_pending_beacons_lock); |
| 1770 | |
| 1771 | schedule_work(®_work); |
| 1772 | |
| 1773 | return 0; |
| 1774 | } |
| 1775 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 1776 | static void print_rd_rules(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1777 | { |
| 1778 | unsigned int i; |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 1779 | const struct ieee80211_reg_rule *reg_rule = NULL; |
| 1780 | const struct ieee80211_freq_range *freq_range = NULL; |
| 1781 | const struct ieee80211_power_rule *power_rule = NULL; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1782 | |
Kalle Valo | 269ac5f | 2009-12-01 10:47:15 +0200 | [diff] [blame] | 1783 | printk(KERN_INFO " (start_freq - end_freq @ bandwidth), " |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1784 | "(max_antenna_gain, max_eirp)\n"); |
| 1785 | |
| 1786 | for (i = 0; i < rd->n_reg_rules; i++) { |
| 1787 | reg_rule = &rd->reg_rules[i]; |
| 1788 | freq_range = ®_rule->freq_range; |
| 1789 | power_rule = ®_rule->power_rule; |
| 1790 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1791 | /* |
| 1792 | * There may not be documentation for max antenna gain |
| 1793 | * in certain regions |
| 1794 | */ |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1795 | if (power_rule->max_antenna_gain) |
Kalle Valo | 269ac5f | 2009-12-01 10:47:15 +0200 | [diff] [blame] | 1796 | printk(KERN_INFO " (%d KHz - %d KHz @ %d KHz), " |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1797 | "(%d mBi, %d mBm)\n", |
| 1798 | freq_range->start_freq_khz, |
| 1799 | freq_range->end_freq_khz, |
| 1800 | freq_range->max_bandwidth_khz, |
| 1801 | power_rule->max_antenna_gain, |
| 1802 | power_rule->max_eirp); |
| 1803 | else |
Kalle Valo | 269ac5f | 2009-12-01 10:47:15 +0200 | [diff] [blame] | 1804 | printk(KERN_INFO " (%d KHz - %d KHz @ %d KHz), " |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1805 | "(N/A, %d mBm)\n", |
| 1806 | freq_range->start_freq_khz, |
| 1807 | freq_range->end_freq_khz, |
| 1808 | freq_range->max_bandwidth_khz, |
| 1809 | power_rule->max_eirp); |
| 1810 | } |
| 1811 | } |
| 1812 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 1813 | static void print_regdomain(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1814 | { |
| 1815 | |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1816 | if (is_intersected_alpha2(rd->alpha2)) { |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1817 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1818 | if (last_request->initiator == |
| 1819 | NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 1820 | struct cfg80211_registered_device *rdev; |
| 1821 | rdev = cfg80211_rdev_by_wiphy_idx( |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 1822 | last_request->wiphy_idx); |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 1823 | if (rdev) { |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1824 | printk(KERN_INFO "cfg80211: Current regulatory " |
| 1825 | "domain updated by AP to: %c%c\n", |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 1826 | rdev->country_ie_alpha2[0], |
| 1827 | rdev->country_ie_alpha2[1]); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1828 | } else |
| 1829 | printk(KERN_INFO "cfg80211: Current regulatory " |
Frans Pop | 55f9893 | 2010-03-24 19:46:29 +0100 | [diff] [blame] | 1830 | "domain intersected:\n"); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1831 | } else |
Frans Pop | 55f9893 | 2010-03-24 19:46:29 +0100 | [diff] [blame] | 1832 | printk(KERN_INFO "cfg80211: Current regulatory " |
| 1833 | "domain intersected:\n"); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1834 | } else if (is_world_regdom(rd->alpha2)) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1835 | printk(KERN_INFO "cfg80211: World regulatory " |
| 1836 | "domain updated:\n"); |
| 1837 | else { |
| 1838 | if (is_unknown_alpha2(rd->alpha2)) |
| 1839 | printk(KERN_INFO "cfg80211: Regulatory domain " |
| 1840 | "changed to driver built-in settings " |
| 1841 | "(unknown country)\n"); |
| 1842 | else |
| 1843 | printk(KERN_INFO "cfg80211: Regulatory domain " |
| 1844 | "changed to country: %c%c\n", |
| 1845 | rd->alpha2[0], rd->alpha2[1]); |
| 1846 | } |
| 1847 | print_rd_rules(rd); |
| 1848 | } |
| 1849 | |
Johannes Berg | 2df7816 | 2008-10-28 16:49:41 +0100 | [diff] [blame] | 1850 | static void print_regdomain_info(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1851 | { |
| 1852 | printk(KERN_INFO "cfg80211: Regulatory domain: %c%c\n", |
| 1853 | rd->alpha2[0], rd->alpha2[1]); |
| 1854 | print_rd_rules(rd); |
| 1855 | } |
| 1856 | |
Johannes Berg | d2372b3 | 2008-10-24 20:32:20 +0200 | [diff] [blame] | 1857 | /* Takes ownership of rd only if it doesn't fail */ |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 1858 | static int __set_regdom(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1859 | { |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 1860 | const struct ieee80211_regdomain *intersected_rd = NULL; |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 1861 | struct cfg80211_registered_device *rdev = NULL; |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 1862 | struct wiphy *request_wiphy; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1863 | /* Some basic sanity checks first */ |
| 1864 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1865 | if (is_world_regdom(rd->alpha2)) { |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 1866 | if (WARN_ON(!reg_is_valid_request(rd->alpha2))) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1867 | return -EINVAL; |
| 1868 | update_world_regdomain(rd); |
| 1869 | return 0; |
| 1870 | } |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1871 | |
| 1872 | if (!is_alpha2_set(rd->alpha2) && !is_an_alpha2(rd->alpha2) && |
| 1873 | !is_unknown_alpha2(rd->alpha2)) |
| 1874 | return -EINVAL; |
| 1875 | |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 1876 | if (!last_request) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1877 | return -EINVAL; |
| 1878 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1879 | /* |
| 1880 | * Lets only bother proceeding on the same alpha2 if the current |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1881 | * rd is non static (it means CRDA was present and was used last) |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1882 | * and the pending request came in from a country IE |
| 1883 | */ |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1884 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1885 | /* |
| 1886 | * If someone else asked us to change the rd lets only bother |
| 1887 | * checking if the alpha2 changes if CRDA was already called |
| 1888 | */ |
John W. Linville | baeb66f | 2009-12-18 17:59:02 -0500 | [diff] [blame] | 1889 | if (!regdom_changes(rd->alpha2)) |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1890 | return -EINVAL; |
| 1891 | } |
| 1892 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1893 | /* |
| 1894 | * Now lets set the regulatory domain, update all driver channels |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1895 | * and finally inform them of what we have done, in case they want |
| 1896 | * to review or adjust their own settings based on their own |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1897 | * internal EEPROM data |
| 1898 | */ |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1899 | |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 1900 | if (WARN_ON(!reg_is_valid_request(rd->alpha2))) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1901 | return -EINVAL; |
| 1902 | |
Luis R. Rodriguez | 8375af3 | 2008-11-12 14:21:57 -0800 | [diff] [blame] | 1903 | if (!is_valid_rd(rd)) { |
| 1904 | printk(KERN_ERR "cfg80211: Invalid " |
| 1905 | "regulatory domain detected:\n"); |
| 1906 | print_regdomain_info(rd); |
| 1907 | return -EINVAL; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1908 | } |
| 1909 | |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 1910 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
| 1911 | |
Luis R. Rodriguez | b8295ac | 2008-11-12 14:21:58 -0800 | [diff] [blame] | 1912 | if (!last_request->intersect) { |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1913 | int r; |
| 1914 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1915 | if (last_request->initiator != NL80211_REGDOM_SET_BY_DRIVER) { |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1916 | reset_regdomains(); |
| 1917 | cfg80211_regdomain = rd; |
| 1918 | return 0; |
| 1919 | } |
| 1920 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1921 | /* |
| 1922 | * For a driver hint, lets copy the regulatory domain the |
| 1923 | * driver wanted to the wiphy to deal with conflicts |
| 1924 | */ |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1925 | |
Luis R. Rodriguez | 558f6d3 | 2009-06-08 18:54:37 -0700 | [diff] [blame] | 1926 | /* |
| 1927 | * Userspace could have sent two replies with only |
| 1928 | * one kernel request. |
| 1929 | */ |
| 1930 | if (request_wiphy->regd) |
| 1931 | return -EALREADY; |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1932 | |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 1933 | r = reg_copy_regd(&request_wiphy->regd, rd); |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1934 | if (r) |
| 1935 | return r; |
| 1936 | |
Luis R. Rodriguez | b8295ac | 2008-11-12 14:21:58 -0800 | [diff] [blame] | 1937 | reset_regdomains(); |
| 1938 | cfg80211_regdomain = rd; |
| 1939 | return 0; |
| 1940 | } |
| 1941 | |
| 1942 | /* Intersection requires a bit more work */ |
| 1943 | |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1944 | if (last_request->initiator != NL80211_REGDOM_SET_BY_COUNTRY_IE) { |
Luis R. Rodriguez | b8295ac | 2008-11-12 14:21:58 -0800 | [diff] [blame] | 1945 | |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 1946 | intersected_rd = regdom_intersect(rd, cfg80211_regdomain); |
| 1947 | if (!intersected_rd) |
| 1948 | return -EINVAL; |
Luis R. Rodriguez | b8295ac | 2008-11-12 14:21:58 -0800 | [diff] [blame] | 1949 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1950 | /* |
| 1951 | * We can trash what CRDA provided now. |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1952 | * However if a driver requested this specific regulatory |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1953 | * domain we keep it for its private use |
| 1954 | */ |
Luis R. Rodriguez | 7db90f4 | 2009-03-09 22:07:41 -0400 | [diff] [blame] | 1955 | if (last_request->initiator == NL80211_REGDOM_SET_BY_DRIVER) |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 1956 | request_wiphy->regd = rd; |
Luis R. Rodriguez | 3e0c3ff | 2009-01-07 17:43:34 -0800 | [diff] [blame] | 1957 | else |
| 1958 | kfree(rd); |
| 1959 | |
Luis R. Rodriguez | b8295ac | 2008-11-12 14:21:58 -0800 | [diff] [blame] | 1960 | rd = NULL; |
| 1961 | |
| 1962 | reset_regdomains(); |
| 1963 | cfg80211_regdomain = intersected_rd; |
| 1964 | |
| 1965 | return 0; |
Luis R. Rodriguez | 9c96477 | 2008-10-30 13:33:53 -0700 | [diff] [blame] | 1966 | } |
| 1967 | |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1968 | if (!intersected_rd) |
| 1969 | return -EINVAL; |
| 1970 | |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 1971 | rdev = wiphy_to_dev(request_wiphy); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1972 | |
Johannes Berg | 79c97e9 | 2009-07-07 03:56:12 +0200 | [diff] [blame] | 1973 | rdev->country_ie_alpha2[0] = rd->alpha2[0]; |
| 1974 | rdev->country_ie_alpha2[1] = rd->alpha2[1]; |
| 1975 | rdev->env = last_request->country_ie_env; |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1976 | |
| 1977 | BUG_ON(intersected_rd == rd); |
| 1978 | |
| 1979 | kfree(rd); |
| 1980 | rd = NULL; |
| 1981 | |
Luis R. Rodriguez | b8295ac | 2008-11-12 14:21:58 -0800 | [diff] [blame] | 1982 | reset_regdomains(); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 1983 | cfg80211_regdomain = intersected_rd; |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1984 | |
| 1985 | return 0; |
| 1986 | } |
| 1987 | |
| 1988 | |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1989 | /* |
| 1990 | * Use this call to set the current regulatory domain. Conflicts with |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1991 | * multiple drivers can be ironed out later. Caller must've already |
Luis R. Rodriguez | fb1fc7a | 2009-02-21 00:04:31 -0500 | [diff] [blame] | 1992 | * kmalloc'd the rd structure. Caller must hold cfg80211_mutex |
| 1993 | */ |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 1994 | int set_regdom(const struct ieee80211_regdomain *rd) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1995 | { |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 1996 | int r; |
| 1997 | |
Luis R. Rodriguez | 761cf7e | 2009-02-21 00:04:25 -0500 | [diff] [blame] | 1998 | assert_cfg80211_lock(); |
| 1999 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2000 | mutex_lock(®_mutex); |
| 2001 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2002 | /* Note that this doesn't update the wiphys, this is done below */ |
| 2003 | r = __set_regdom(rd); |
Johannes Berg | d2372b3 | 2008-10-24 20:32:20 +0200 | [diff] [blame] | 2004 | if (r) { |
| 2005 | kfree(rd); |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2006 | mutex_unlock(®_mutex); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2007 | return r; |
Johannes Berg | d2372b3 | 2008-10-24 20:32:20 +0200 | [diff] [blame] | 2008 | } |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2009 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2010 | /* This would make this whole thing pointless */ |
Luis R. Rodriguez | a01ddaf | 2008-11-12 14:21:59 -0800 | [diff] [blame] | 2011 | if (!last_request->intersect) |
| 2012 | BUG_ON(rd != cfg80211_regdomain); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2013 | |
| 2014 | /* update all wiphys now with the new established regulatory domain */ |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 2015 | update_all_wiphy_regulatory(last_request->initiator); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2016 | |
Luis R. Rodriguez | a01ddaf | 2008-11-12 14:21:59 -0800 | [diff] [blame] | 2017 | print_regdomain(cfg80211_regdomain); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2018 | |
Luis R. Rodriguez | 73d54c9 | 2009-03-09 22:07:42 -0400 | [diff] [blame] | 2019 | nl80211_send_reg_change_event(last_request); |
| 2020 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2021 | mutex_unlock(®_mutex); |
| 2022 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2023 | return r; |
| 2024 | } |
| 2025 | |
Luis R. Rodriguez | a179439 | 2009-02-21 00:04:21 -0500 | [diff] [blame] | 2026 | /* Caller must hold cfg80211_mutex */ |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2027 | void reg_device_remove(struct wiphy *wiphy) |
| 2028 | { |
Luis R. Rodriguez | 0ad8aca | 2009-03-24 21:21:08 -0400 | [diff] [blame] | 2029 | struct wiphy *request_wiphy = NULL; |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 2030 | |
Luis R. Rodriguez | 761cf7e | 2009-02-21 00:04:25 -0500 | [diff] [blame] | 2031 | assert_cfg80211_lock(); |
| 2032 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2033 | mutex_lock(®_mutex); |
| 2034 | |
Chris Wright | 0ef9ccd | 2009-04-24 14:09:31 -0700 | [diff] [blame] | 2035 | kfree(wiphy->regd); |
| 2036 | |
Luis R. Rodriguez | 0ad8aca | 2009-03-24 21:21:08 -0400 | [diff] [blame] | 2037 | if (last_request) |
| 2038 | request_wiphy = wiphy_idx_to_wiphy(last_request->wiphy_idx); |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 2039 | |
Chris Wright | 0ef9ccd | 2009-04-24 14:09:31 -0700 | [diff] [blame] | 2040 | if (!request_wiphy || request_wiphy != wiphy) |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2041 | goto out; |
Chris Wright | 0ef9ccd | 2009-04-24 14:09:31 -0700 | [diff] [blame] | 2042 | |
Luis R. Rodriguez | 806a9e3 | 2009-02-21 00:04:26 -0500 | [diff] [blame] | 2043 | last_request->wiphy_idx = WIPHY_IDX_STALE; |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2044 | last_request->country_ie_env = ENVIRON_ANY; |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2045 | out: |
| 2046 | mutex_unlock(®_mutex); |
Luis R. Rodriguez | 3f2355c | 2008-11-12 14:22:02 -0800 | [diff] [blame] | 2047 | } |
| 2048 | |
Uwe Kleine-König | 2fcc9f7 | 2010-06-18 09:38:55 +0200 | [diff] [blame] | 2049 | int __init regulatory_init(void) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2050 | { |
Luis R. Rodriguez | bcf4f99 | 2009-02-21 00:04:24 -0500 | [diff] [blame] | 2051 | int err = 0; |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 2052 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2053 | reg_pdev = platform_device_register_simple("regulatory", 0, NULL, 0); |
| 2054 | if (IS_ERR(reg_pdev)) |
| 2055 | return PTR_ERR(reg_pdev); |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 2056 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 2057 | spin_lock_init(®_requests_lock); |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 2058 | spin_lock_init(®_pending_beacons_lock); |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 2059 | |
Johannes Berg | a3d2eaf | 2008-09-15 11:10:52 +0200 | [diff] [blame] | 2060 | cfg80211_regdomain = cfg80211_world_regdom; |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 2061 | |
Luis R. Rodriguez | 09d989d | 2010-01-29 19:58:57 -0500 | [diff] [blame] | 2062 | user_alpha2[0] = '9'; |
| 2063 | user_alpha2[1] = '7'; |
| 2064 | |
Luis R. Rodriguez | ae9e4b0 | 2009-07-14 20:23:15 -0400 | [diff] [blame] | 2065 | /* We always try to get an update for the static regdomain */ |
| 2066 | err = regulatory_hint_core(cfg80211_regdomain->alpha2); |
Luis R. Rodriguez | bcf4f99 | 2009-02-21 00:04:24 -0500 | [diff] [blame] | 2067 | if (err) { |
| 2068 | if (err == -ENOMEM) |
| 2069 | return err; |
| 2070 | /* |
| 2071 | * N.B. kobject_uevent_env() can fail mainly for when we're out |
| 2072 | * memory which is handled and propagated appropriately above |
| 2073 | * but it can also fail during a netlink_broadcast() or during |
| 2074 | * early boot for call_usermodehelper(). For now treat these |
| 2075 | * errors as non-fatal. |
| 2076 | */ |
| 2077 | printk(KERN_ERR "cfg80211: kobject_uevent_env() was unable " |
| 2078 | "to call CRDA during init"); |
| 2079 | #ifdef CONFIG_CFG80211_REG_DEBUG |
| 2080 | /* We want to find out exactly why when debugging */ |
| 2081 | WARN_ON(err); |
| 2082 | #endif |
| 2083 | } |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 2084 | |
Luis R. Rodriguez | ae9e4b0 | 2009-07-14 20:23:15 -0400 | [diff] [blame] | 2085 | /* |
| 2086 | * Finally, if the user set the module parameter treat it |
| 2087 | * as a user hint. |
| 2088 | */ |
| 2089 | if (!is_world_regdom(ieee80211_regdom)) |
| 2090 | regulatory_hint_user(ieee80211_regdom); |
| 2091 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2092 | return 0; |
| 2093 | } |
| 2094 | |
Uwe Kleine-König | 2fcc9f7 | 2010-06-18 09:38:55 +0200 | [diff] [blame] | 2095 | void /* __init_or_exit */ regulatory_exit(void) |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2096 | { |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 2097 | struct regulatory_request *reg_request, *tmp; |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 2098 | struct reg_beacon *reg_beacon, *btmp; |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 2099 | |
| 2100 | cancel_work_sync(®_work); |
| 2101 | |
Luis R. Rodriguez | a179439 | 2009-02-21 00:04:21 -0500 | [diff] [blame] | 2102 | mutex_lock(&cfg80211_mutex); |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2103 | mutex_lock(®_mutex); |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 2104 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2105 | reset_regdomains(); |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 2106 | |
Johannes Berg | f6037d0 | 2008-10-21 11:01:33 +0200 | [diff] [blame] | 2107 | kfree(last_request); |
| 2108 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame] | 2109 | platform_device_unregister(reg_pdev); |
Johannes Berg | 734366d | 2008-09-15 10:56:48 +0200 | [diff] [blame] | 2110 | |
Luis R. Rodriguez | e38f8a7 | 2009-02-21 00:20:39 -0500 | [diff] [blame] | 2111 | spin_lock_bh(®_pending_beacons_lock); |
| 2112 | if (!list_empty(®_pending_beacons)) { |
| 2113 | list_for_each_entry_safe(reg_beacon, btmp, |
| 2114 | ®_pending_beacons, list) { |
| 2115 | list_del(®_beacon->list); |
| 2116 | kfree(reg_beacon); |
| 2117 | } |
| 2118 | } |
| 2119 | spin_unlock_bh(®_pending_beacons_lock); |
| 2120 | |
| 2121 | if (!list_empty(®_beacon_list)) { |
| 2122 | list_for_each_entry_safe(reg_beacon, btmp, |
| 2123 | ®_beacon_list, list) { |
| 2124 | list_del(®_beacon->list); |
| 2125 | kfree(reg_beacon); |
| 2126 | } |
| 2127 | } |
| 2128 | |
Luis R. Rodriguez | fe33eb3 | 2009-02-21 00:04:30 -0500 | [diff] [blame] | 2129 | spin_lock(®_requests_lock); |
| 2130 | if (!list_empty(®_requests_list)) { |
| 2131 | list_for_each_entry_safe(reg_request, tmp, |
| 2132 | ®_requests_list, list) { |
| 2133 | list_del(®_request->list); |
| 2134 | kfree(reg_request); |
| 2135 | } |
| 2136 | } |
| 2137 | spin_unlock(®_requests_lock); |
| 2138 | |
Luis R. Rodriguez | abc7381 | 2009-07-30 17:38:08 -0700 | [diff] [blame] | 2139 | mutex_unlock(®_mutex); |
Luis R. Rodriguez | a179439 | 2009-02-21 00:04:21 -0500 | [diff] [blame] | 2140 | mutex_unlock(&cfg80211_mutex); |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 2141 | } |