Johannes Berg | 704232c | 2007-04-23 12:20:05 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This is the linux wireless configuration interface. |
| 3 | * |
Luis R. Rodriguez | f59ac04 | 2008-08-29 16:26:43 -0700 | [diff] [blame] | 4 | * Copyright 2006-2008 Johannes Berg <johannes@sipsolutions.net> |
Johannes Berg | 704232c | 2007-04-23 12:20:05 -0700 | [diff] [blame] | 5 | */ |
| 6 | |
| 7 | #include <linux/if.h> |
| 8 | #include <linux/module.h> |
| 9 | #include <linux/err.h> |
| 10 | #include <linux/mutex.h> |
| 11 | #include <linux/list.h> |
| 12 | #include <linux/nl80211.h> |
| 13 | #include <linux/debugfs.h> |
| 14 | #include <linux/notifier.h> |
| 15 | #include <linux/device.h> |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame^] | 16 | #include <linux/list.h> |
Johannes Berg | 704232c | 2007-04-23 12:20:05 -0700 | [diff] [blame] | 17 | #include <net/genetlink.h> |
| 18 | #include <net/cfg80211.h> |
| 19 | #include <net/wireless.h> |
Johannes Berg | 5568296 | 2007-09-20 13:09:35 -0400 | [diff] [blame] | 20 | #include "nl80211.h" |
Johannes Berg | 704232c | 2007-04-23 12:20:05 -0700 | [diff] [blame] | 21 | #include "core.h" |
| 22 | #include "sysfs.h" |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame^] | 23 | #include "reg.h" |
Johannes Berg | 704232c | 2007-04-23 12:20:05 -0700 | [diff] [blame] | 24 | |
| 25 | /* name for sysfs, %d is appended */ |
| 26 | #define PHY_NAME "phy" |
| 27 | |
| 28 | MODULE_AUTHOR("Johannes Berg"); |
| 29 | MODULE_LICENSE("GPL"); |
| 30 | MODULE_DESCRIPTION("wireless configuration support"); |
| 31 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame^] | 32 | struct list_head regulatory_requests; |
| 33 | |
| 34 | /* Central wireless core regulatory domains, we only need two, |
| 35 | * the current one and a world regulatory domain in case we have no |
| 36 | * information to give us an alpha2 */ |
| 37 | struct ieee80211_regdomain *cfg80211_regdomain; |
| 38 | |
| 39 | /* We keep a static world regulatory domain in case of the absence of CRDA */ |
| 40 | const struct ieee80211_regdomain world_regdom = { |
| 41 | .n_reg_rules = 1, |
| 42 | .alpha2 = "00", |
| 43 | .reg_rules = { |
| 44 | REG_RULE(2402, 2472, 40, 6, 20, |
| 45 | NL80211_RRF_PASSIVE_SCAN | |
| 46 | NL80211_RRF_NO_IBSS), |
| 47 | } |
| 48 | }; |
| 49 | |
| 50 | #ifdef CONFIG_WIRELESS_OLD_REGULATORY |
| 51 | /* All this fucking static junk will be removed soon, so |
| 52 | * don't fucking count on it !@#$ */ |
| 53 | |
| 54 | static char *ieee80211_regdom = "US"; |
| 55 | module_param(ieee80211_regdom, charp, 0444); |
| 56 | MODULE_PARM_DESC(ieee80211_regdom, "IEEE 802.11 regulatory domain code"); |
| 57 | |
| 58 | /* We assume 40 MHz bandwidth for the old regulatory work. |
| 59 | * We make emphasis we are using the exact same frequencies |
| 60 | * as before */ |
| 61 | |
| 62 | const struct ieee80211_regdomain us_regdom = { |
| 63 | .n_reg_rules = 6, |
| 64 | .alpha2 = "US", |
| 65 | .reg_rules = { |
| 66 | /* IEEE 802.11b/g, channels 1..11 */ |
| 67 | REG_RULE(2412-20, 2462+20, 40, 6, 27, 0), |
| 68 | /* IEEE 802.11a, channel 36 */ |
| 69 | REG_RULE(5180-20, 5180+20, 40, 6, 23, 0), |
| 70 | /* IEEE 802.11a, channel 40 */ |
| 71 | REG_RULE(5200-20, 5200+20, 40, 6, 23, 0), |
| 72 | /* IEEE 802.11a, channel 44 */ |
| 73 | REG_RULE(5220-20, 5220+20, 40, 6, 23, 0), |
| 74 | /* IEEE 802.11a, channels 48..64 */ |
| 75 | REG_RULE(5240-20, 5320+20, 40, 6, 23, 0), |
| 76 | /* IEEE 802.11a, channels 149..165, outdoor */ |
| 77 | REG_RULE(5745-20, 5825+20, 40, 6, 30, 0), |
| 78 | } |
| 79 | }; |
| 80 | |
| 81 | const struct ieee80211_regdomain jp_regdom = { |
| 82 | .n_reg_rules = 3, |
| 83 | .alpha2 = "JP", |
| 84 | .reg_rules = { |
| 85 | /* IEEE 802.11b/g, channels 1..14 */ |
| 86 | REG_RULE(2412-20, 2484+20, 40, 6, 20, 0), |
| 87 | /* IEEE 802.11a, channels 34..48 */ |
| 88 | REG_RULE(5170-20, 5240+20, 40, 6, 20, |
| 89 | NL80211_RRF_PASSIVE_SCAN), |
| 90 | /* IEEE 802.11a, channels 52..64 */ |
| 91 | REG_RULE(5260-20, 5320+20, 40, 6, 20, |
| 92 | NL80211_RRF_NO_IBSS | |
| 93 | NL80211_RRF_DFS), |
| 94 | } |
| 95 | }; |
| 96 | |
| 97 | const struct ieee80211_regdomain eu_regdom = { |
| 98 | .n_reg_rules = 6, |
| 99 | /* This alpha2 is bogus, we leave it here just for stupid |
| 100 | * backward compatibility */ |
| 101 | .alpha2 = "EU", |
| 102 | .reg_rules = { |
| 103 | /* IEEE 802.11b/g, channels 1..13 */ |
| 104 | REG_RULE(2412-20, 2472+20, 40, 6, 20, 0), |
| 105 | /* IEEE 802.11a, channel 36 */ |
| 106 | REG_RULE(5180-20, 5180+20, 40, 6, 23, |
| 107 | NL80211_RRF_PASSIVE_SCAN), |
| 108 | /* IEEE 802.11a, channel 40 */ |
| 109 | REG_RULE(5200-20, 5200+20, 40, 6, 23, |
| 110 | NL80211_RRF_PASSIVE_SCAN), |
| 111 | /* IEEE 802.11a, channel 44 */ |
| 112 | REG_RULE(5220-20, 5220+20, 40, 6, 23, |
| 113 | NL80211_RRF_PASSIVE_SCAN), |
| 114 | /* IEEE 802.11a, channels 48..64 */ |
| 115 | REG_RULE(5240-20, 5320+20, 40, 6, 20, |
| 116 | NL80211_RRF_NO_IBSS | |
| 117 | NL80211_RRF_DFS), |
| 118 | /* IEEE 802.11a, channels 100..140 */ |
| 119 | REG_RULE(5500-20, 5700+20, 40, 6, 30, |
| 120 | NL80211_RRF_NO_IBSS | |
| 121 | NL80211_RRF_DFS), |
| 122 | } |
| 123 | }; |
| 124 | |
| 125 | #endif |
| 126 | |
| 127 | struct ieee80211_regdomain *cfg80211_world_regdom = |
| 128 | (struct ieee80211_regdomain *) &world_regdom; |
| 129 | |
| 130 | LIST_HEAD(regulatory_requests); |
| 131 | DEFINE_MUTEX(cfg80211_reg_mutex); |
| 132 | |
Johannes Berg | 704232c | 2007-04-23 12:20:05 -0700 | [diff] [blame] | 133 | /* RCU might be appropriate here since we usually |
| 134 | * only read the list, and that can happen quite |
| 135 | * often because we need to do it for each command */ |
| 136 | LIST_HEAD(cfg80211_drv_list); |
| 137 | DEFINE_MUTEX(cfg80211_drv_mutex); |
| 138 | static int wiphy_counter; |
| 139 | |
| 140 | /* for debugfs */ |
| 141 | static struct dentry *ieee80211_debugfs_dir; |
| 142 | |
Johannes Berg | 5568296 | 2007-09-20 13:09:35 -0400 | [diff] [blame] | 143 | /* requires cfg80211_drv_mutex to be held! */ |
| 144 | static struct cfg80211_registered_device *cfg80211_drv_by_wiphy(int wiphy) |
| 145 | { |
| 146 | struct cfg80211_registered_device *result = NULL, *drv; |
| 147 | |
| 148 | list_for_each_entry(drv, &cfg80211_drv_list, list) { |
| 149 | if (drv->idx == wiphy) { |
| 150 | result = drv; |
| 151 | break; |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | return result; |
| 156 | } |
| 157 | |
| 158 | /* requires cfg80211_drv_mutex to be held! */ |
| 159 | static struct cfg80211_registered_device * |
| 160 | __cfg80211_drv_from_info(struct genl_info *info) |
| 161 | { |
| 162 | int ifindex; |
| 163 | struct cfg80211_registered_device *bywiphy = NULL, *byifidx = NULL; |
| 164 | struct net_device *dev; |
| 165 | int err = -EINVAL; |
| 166 | |
| 167 | if (info->attrs[NL80211_ATTR_WIPHY]) { |
| 168 | bywiphy = cfg80211_drv_by_wiphy( |
| 169 | nla_get_u32(info->attrs[NL80211_ATTR_WIPHY])); |
| 170 | err = -ENODEV; |
| 171 | } |
| 172 | |
| 173 | if (info->attrs[NL80211_ATTR_IFINDEX]) { |
| 174 | ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]); |
| 175 | dev = dev_get_by_index(&init_net, ifindex); |
| 176 | if (dev) { |
| 177 | if (dev->ieee80211_ptr) |
| 178 | byifidx = |
| 179 | wiphy_to_dev(dev->ieee80211_ptr->wiphy); |
| 180 | dev_put(dev); |
| 181 | } |
| 182 | err = -ENODEV; |
| 183 | } |
| 184 | |
| 185 | if (bywiphy && byifidx) { |
| 186 | if (bywiphy != byifidx) |
| 187 | return ERR_PTR(-EINVAL); |
| 188 | else |
| 189 | return bywiphy; /* == byifidx */ |
| 190 | } |
| 191 | if (bywiphy) |
| 192 | return bywiphy; |
| 193 | |
| 194 | if (byifidx) |
| 195 | return byifidx; |
| 196 | |
| 197 | return ERR_PTR(err); |
| 198 | } |
| 199 | |
| 200 | struct cfg80211_registered_device * |
| 201 | cfg80211_get_dev_from_info(struct genl_info *info) |
| 202 | { |
| 203 | struct cfg80211_registered_device *drv; |
| 204 | |
| 205 | mutex_lock(&cfg80211_drv_mutex); |
| 206 | drv = __cfg80211_drv_from_info(info); |
| 207 | |
| 208 | /* if it is not an error we grab the lock on |
| 209 | * it to assure it won't be going away while |
| 210 | * we operate on it */ |
| 211 | if (!IS_ERR(drv)) |
| 212 | mutex_lock(&drv->mtx); |
| 213 | |
| 214 | mutex_unlock(&cfg80211_drv_mutex); |
| 215 | |
| 216 | return drv; |
| 217 | } |
| 218 | |
| 219 | struct cfg80211_registered_device * |
| 220 | cfg80211_get_dev_from_ifindex(int ifindex) |
| 221 | { |
| 222 | struct cfg80211_registered_device *drv = ERR_PTR(-ENODEV); |
| 223 | struct net_device *dev; |
| 224 | |
| 225 | mutex_lock(&cfg80211_drv_mutex); |
| 226 | dev = dev_get_by_index(&init_net, ifindex); |
| 227 | if (!dev) |
| 228 | goto out; |
| 229 | if (dev->ieee80211_ptr) { |
| 230 | drv = wiphy_to_dev(dev->ieee80211_ptr->wiphy); |
| 231 | mutex_lock(&drv->mtx); |
| 232 | } else |
| 233 | drv = ERR_PTR(-ENODEV); |
| 234 | dev_put(dev); |
| 235 | out: |
| 236 | mutex_unlock(&cfg80211_drv_mutex); |
| 237 | return drv; |
| 238 | } |
| 239 | |
| 240 | void cfg80211_put_dev(struct cfg80211_registered_device *drv) |
| 241 | { |
| 242 | BUG_ON(IS_ERR(drv)); |
| 243 | mutex_unlock(&drv->mtx); |
| 244 | } |
| 245 | |
| 246 | int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, |
| 247 | char *newname) |
| 248 | { |
Eric W. Biederman | 2940bb6 | 2008-05-08 14:30:18 -0700 | [diff] [blame] | 249 | struct cfg80211_registered_device *drv; |
Johannes Berg | 5568296 | 2007-09-20 13:09:35 -0400 | [diff] [blame] | 250 | int idx, taken = -1, result, digits; |
| 251 | |
Eric W. Biederman | 2940bb6 | 2008-05-08 14:30:18 -0700 | [diff] [blame] | 252 | mutex_lock(&cfg80211_drv_mutex); |
| 253 | |
Johannes Berg | 5568296 | 2007-09-20 13:09:35 -0400 | [diff] [blame] | 254 | /* prohibit calling the thing phy%d when %d is not its number */ |
| 255 | sscanf(newname, PHY_NAME "%d%n", &idx, &taken); |
| 256 | if (taken == strlen(newname) && idx != rdev->idx) { |
| 257 | /* count number of places needed to print idx */ |
| 258 | digits = 1; |
| 259 | while (idx /= 10) |
| 260 | digits++; |
| 261 | /* |
| 262 | * deny the name if it is phy<idx> where <idx> is printed |
| 263 | * without leading zeroes. taken == strlen(newname) here |
| 264 | */ |
Eric W. Biederman | 2940bb6 | 2008-05-08 14:30:18 -0700 | [diff] [blame] | 265 | result = -EINVAL; |
Johannes Berg | 5568296 | 2007-09-20 13:09:35 -0400 | [diff] [blame] | 266 | if (taken == strlen(PHY_NAME) + digits) |
Eric W. Biederman | 2940bb6 | 2008-05-08 14:30:18 -0700 | [diff] [blame] | 267 | goto out_unlock; |
Johannes Berg | 5568296 | 2007-09-20 13:09:35 -0400 | [diff] [blame] | 268 | } |
| 269 | |
Eric W. Biederman | 2940bb6 | 2008-05-08 14:30:18 -0700 | [diff] [blame] | 270 | |
| 271 | /* Ignore nop renames */ |
| 272 | result = 0; |
| 273 | if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0) |
| 274 | goto out_unlock; |
| 275 | |
| 276 | /* Ensure another device does not already have this name. */ |
| 277 | list_for_each_entry(drv, &cfg80211_drv_list, list) { |
| 278 | result = -EINVAL; |
| 279 | if (strcmp(newname, dev_name(&drv->wiphy.dev)) == 0) |
| 280 | goto out_unlock; |
| 281 | } |
| 282 | |
| 283 | /* this will only check for collisions in sysfs |
| 284 | * which is not even always compiled in. |
| 285 | */ |
Johannes Berg | 5568296 | 2007-09-20 13:09:35 -0400 | [diff] [blame] | 286 | result = device_rename(&rdev->wiphy.dev, newname); |
| 287 | if (result) |
Eric W. Biederman | 2940bb6 | 2008-05-08 14:30:18 -0700 | [diff] [blame] | 288 | goto out_unlock; |
Johannes Berg | 5568296 | 2007-09-20 13:09:35 -0400 | [diff] [blame] | 289 | |
| 290 | if (!debugfs_rename(rdev->wiphy.debugfsdir->d_parent, |
| 291 | rdev->wiphy.debugfsdir, |
| 292 | rdev->wiphy.debugfsdir->d_parent, |
| 293 | newname)) |
| 294 | printk(KERN_ERR "cfg80211: failed to rename debugfs dir to %s!\n", |
| 295 | newname); |
| 296 | |
Eric W. Biederman | 2940bb6 | 2008-05-08 14:30:18 -0700 | [diff] [blame] | 297 | result = 0; |
| 298 | out_unlock: |
| 299 | mutex_unlock(&cfg80211_drv_mutex); |
| 300 | if (result == 0) |
| 301 | nl80211_notify_dev_rename(rdev); |
Johannes Berg | 5568296 | 2007-09-20 13:09:35 -0400 | [diff] [blame] | 302 | |
Eric W. Biederman | 2940bb6 | 2008-05-08 14:30:18 -0700 | [diff] [blame] | 303 | return result; |
Johannes Berg | 5568296 | 2007-09-20 13:09:35 -0400 | [diff] [blame] | 304 | } |
| 305 | |
Johannes Berg | 704232c | 2007-04-23 12:20:05 -0700 | [diff] [blame] | 306 | /* exported functions */ |
| 307 | |
| 308 | struct wiphy *wiphy_new(struct cfg80211_ops *ops, int sizeof_priv) |
| 309 | { |
| 310 | struct cfg80211_registered_device *drv; |
| 311 | int alloc_size; |
| 312 | |
Johannes Berg | 41ade00 | 2007-12-19 02:03:29 +0100 | [diff] [blame] | 313 | WARN_ON(!ops->add_key && ops->del_key); |
| 314 | WARN_ON(ops->add_key && !ops->del_key); |
| 315 | |
Johannes Berg | 704232c | 2007-04-23 12:20:05 -0700 | [diff] [blame] | 316 | alloc_size = sizeof(*drv) + sizeof_priv; |
| 317 | |
| 318 | drv = kzalloc(alloc_size, GFP_KERNEL); |
| 319 | if (!drv) |
| 320 | return NULL; |
| 321 | |
| 322 | drv->ops = ops; |
| 323 | |
| 324 | mutex_lock(&cfg80211_drv_mutex); |
| 325 | |
Johannes Berg | a4d73ee | 2007-04-26 20:50:35 -0700 | [diff] [blame] | 326 | drv->idx = wiphy_counter; |
| 327 | |
| 328 | /* now increase counter for the next device unless |
| 329 | * it has wrapped previously */ |
| 330 | if (wiphy_counter >= 0) |
| 331 | wiphy_counter++; |
| 332 | |
| 333 | mutex_unlock(&cfg80211_drv_mutex); |
| 334 | |
| 335 | if (unlikely(drv->idx < 0)) { |
Johannes Berg | 704232c | 2007-04-23 12:20:05 -0700 | [diff] [blame] | 336 | /* ugh, wrapped! */ |
| 337 | kfree(drv); |
| 338 | return NULL; |
| 339 | } |
Johannes Berg | 704232c | 2007-04-23 12:20:05 -0700 | [diff] [blame] | 340 | |
| 341 | /* give it a proper name */ |
| 342 | snprintf(drv->wiphy.dev.bus_id, BUS_ID_SIZE, |
| 343 | PHY_NAME "%d", drv->idx); |
| 344 | |
Johannes Berg | 704232c | 2007-04-23 12:20:05 -0700 | [diff] [blame] | 345 | mutex_init(&drv->mtx); |
| 346 | mutex_init(&drv->devlist_mtx); |
| 347 | INIT_LIST_HEAD(&drv->netdev_list); |
| 348 | |
| 349 | device_initialize(&drv->wiphy.dev); |
| 350 | drv->wiphy.dev.class = &ieee80211_class; |
| 351 | drv->wiphy.dev.platform_data = drv; |
| 352 | |
| 353 | return &drv->wiphy; |
| 354 | } |
| 355 | EXPORT_SYMBOL(wiphy_new); |
| 356 | |
| 357 | int wiphy_register(struct wiphy *wiphy) |
| 358 | { |
| 359 | struct cfg80211_registered_device *drv = wiphy_to_dev(wiphy); |
| 360 | int res; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 361 | enum ieee80211_band band; |
| 362 | struct ieee80211_supported_band *sband; |
| 363 | bool have_band = false; |
| 364 | int i; |
Luis R. Rodriguez | f59ac04 | 2008-08-29 16:26:43 -0700 | [diff] [blame] | 365 | u16 ifmodes = wiphy->interface_modes; |
| 366 | |
| 367 | /* sanity check ifmodes */ |
| 368 | WARN_ON(!ifmodes); |
| 369 | ifmodes &= ((1 << __NL80211_IFTYPE_AFTER_LAST) - 1) & ~1; |
| 370 | if (WARN_ON(ifmodes != wiphy->interface_modes)) |
| 371 | wiphy->interface_modes = ifmodes; |
Johannes Berg | 8318d78 | 2008-01-24 19:38:38 +0100 | [diff] [blame] | 372 | |
| 373 | /* sanity check supported bands/channels */ |
| 374 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { |
| 375 | sband = wiphy->bands[band]; |
| 376 | if (!sband) |
| 377 | continue; |
| 378 | |
| 379 | sband->band = band; |
| 380 | |
| 381 | if (!sband->n_channels || !sband->n_bitrates) { |
| 382 | WARN_ON(1); |
| 383 | return -EINVAL; |
| 384 | } |
| 385 | |
| 386 | for (i = 0; i < sband->n_channels; i++) { |
| 387 | sband->channels[i].orig_flags = |
| 388 | sband->channels[i].flags; |
| 389 | sband->channels[i].orig_mag = |
| 390 | sband->channels[i].max_antenna_gain; |
| 391 | sband->channels[i].orig_mpwr = |
| 392 | sband->channels[i].max_power; |
| 393 | sband->channels[i].band = band; |
| 394 | } |
| 395 | |
| 396 | have_band = true; |
| 397 | } |
| 398 | |
| 399 | if (!have_band) { |
| 400 | WARN_ON(1); |
| 401 | return -EINVAL; |
| 402 | } |
| 403 | |
| 404 | /* check and set up bitrates */ |
| 405 | ieee80211_set_bitrate_flags(wiphy); |
| 406 | |
| 407 | /* set up regulatory info */ |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame^] | 408 | mutex_lock(&cfg80211_reg_mutex); |
| 409 | wiphy_update_regulatory(wiphy, REGDOM_SET_BY_CORE); |
| 410 | mutex_unlock(&cfg80211_reg_mutex); |
Johannes Berg | 704232c | 2007-04-23 12:20:05 -0700 | [diff] [blame] | 411 | |
| 412 | mutex_lock(&cfg80211_drv_mutex); |
| 413 | |
Johannes Berg | 704232c | 2007-04-23 12:20:05 -0700 | [diff] [blame] | 414 | res = device_add(&drv->wiphy.dev); |
| 415 | if (res) |
| 416 | goto out_unlock; |
| 417 | |
| 418 | list_add(&drv->list, &cfg80211_drv_list); |
| 419 | |
| 420 | /* add to debugfs */ |
| 421 | drv->wiphy.debugfsdir = |
| 422 | debugfs_create_dir(wiphy_name(&drv->wiphy), |
| 423 | ieee80211_debugfs_dir); |
| 424 | |
| 425 | res = 0; |
| 426 | out_unlock: |
| 427 | mutex_unlock(&cfg80211_drv_mutex); |
| 428 | return res; |
| 429 | } |
| 430 | EXPORT_SYMBOL(wiphy_register); |
| 431 | |
| 432 | void wiphy_unregister(struct wiphy *wiphy) |
| 433 | { |
| 434 | struct cfg80211_registered_device *drv = wiphy_to_dev(wiphy); |
| 435 | |
Johannes Berg | f16bfc1 | 2007-04-26 20:51:12 -0700 | [diff] [blame] | 436 | /* protect the device list */ |
Johannes Berg | 704232c | 2007-04-23 12:20:05 -0700 | [diff] [blame] | 437 | mutex_lock(&cfg80211_drv_mutex); |
| 438 | |
Johannes Berg | f16bfc1 | 2007-04-26 20:51:12 -0700 | [diff] [blame] | 439 | BUG_ON(!list_empty(&drv->netdev_list)); |
| 440 | |
| 441 | /* |
| 442 | * Try to grab drv->mtx. If a command is still in progress, |
| 443 | * hopefully the driver will refuse it since it's tearing |
| 444 | * down the device already. We wait for this command to complete |
| 445 | * before unlinking the item from the list. |
| 446 | * Note: as codified by the BUG_ON above we cannot get here if |
| 447 | * a virtual interface is still associated. Hence, we can only |
| 448 | * get to lock contention here if userspace issues a command |
| 449 | * that identified the hardware by wiphy index. |
| 450 | */ |
Johannes Berg | 704232c | 2007-04-23 12:20:05 -0700 | [diff] [blame] | 451 | mutex_lock(&drv->mtx); |
Johannes Berg | f16bfc1 | 2007-04-26 20:51:12 -0700 | [diff] [blame] | 452 | /* unlock again before freeing */ |
Johannes Berg | 704232c | 2007-04-23 12:20:05 -0700 | [diff] [blame] | 453 | mutex_unlock(&drv->mtx); |
| 454 | |
Johannes Berg | f16bfc1 | 2007-04-26 20:51:12 -0700 | [diff] [blame] | 455 | list_del(&drv->list); |
Johannes Berg | 704232c | 2007-04-23 12:20:05 -0700 | [diff] [blame] | 456 | device_del(&drv->wiphy.dev); |
| 457 | debugfs_remove(drv->wiphy.debugfsdir); |
| 458 | |
| 459 | mutex_unlock(&cfg80211_drv_mutex); |
| 460 | } |
| 461 | EXPORT_SYMBOL(wiphy_unregister); |
| 462 | |
| 463 | void cfg80211_dev_free(struct cfg80211_registered_device *drv) |
| 464 | { |
| 465 | mutex_destroy(&drv->mtx); |
| 466 | mutex_destroy(&drv->devlist_mtx); |
| 467 | kfree(drv); |
| 468 | } |
| 469 | |
| 470 | void wiphy_free(struct wiphy *wiphy) |
| 471 | { |
| 472 | put_device(&wiphy->dev); |
| 473 | } |
| 474 | EXPORT_SYMBOL(wiphy_free); |
| 475 | |
| 476 | static int cfg80211_netdev_notifier_call(struct notifier_block * nb, |
| 477 | unsigned long state, |
| 478 | void *ndev) |
| 479 | { |
| 480 | struct net_device *dev = ndev; |
| 481 | struct cfg80211_registered_device *rdev; |
| 482 | |
| 483 | if (!dev->ieee80211_ptr) |
| 484 | return 0; |
| 485 | |
| 486 | rdev = wiphy_to_dev(dev->ieee80211_ptr->wiphy); |
| 487 | |
| 488 | switch (state) { |
| 489 | case NETDEV_REGISTER: |
| 490 | mutex_lock(&rdev->devlist_mtx); |
| 491 | list_add(&dev->ieee80211_ptr->list, &rdev->netdev_list); |
| 492 | if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj, |
| 493 | "phy80211")) { |
| 494 | printk(KERN_ERR "wireless: failed to add phy80211 " |
| 495 | "symlink to netdev!\n"); |
| 496 | } |
| 497 | dev->ieee80211_ptr->netdev = dev; |
| 498 | mutex_unlock(&rdev->devlist_mtx); |
| 499 | break; |
| 500 | case NETDEV_UNREGISTER: |
| 501 | mutex_lock(&rdev->devlist_mtx); |
| 502 | if (!list_empty(&dev->ieee80211_ptr->list)) { |
| 503 | sysfs_remove_link(&dev->dev.kobj, "phy80211"); |
| 504 | list_del_init(&dev->ieee80211_ptr->list); |
| 505 | } |
| 506 | mutex_unlock(&rdev->devlist_mtx); |
| 507 | break; |
| 508 | } |
| 509 | |
| 510 | return 0; |
| 511 | } |
| 512 | |
| 513 | static struct notifier_block cfg80211_netdev_notifier = { |
| 514 | .notifier_call = cfg80211_netdev_notifier_call, |
| 515 | }; |
| 516 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame^] | 517 | #ifdef CONFIG_WIRELESS_OLD_REGULATORY |
| 518 | const struct ieee80211_regdomain *static_regdom(char *alpha2) |
| 519 | { |
| 520 | if (alpha2[0] == 'U' && alpha2[1] == 'S') |
| 521 | return &us_regdom; |
| 522 | if (alpha2[0] == 'J' && alpha2[1] == 'P') |
| 523 | return &jp_regdom; |
| 524 | if (alpha2[0] == 'E' && alpha2[1] == 'U') |
| 525 | return &eu_regdom; |
| 526 | /* Default, as per the old rules */ |
| 527 | return &us_regdom; |
| 528 | } |
| 529 | #endif |
| 530 | |
Johannes Berg | 704232c | 2007-04-23 12:20:05 -0700 | [diff] [blame] | 531 | static int cfg80211_init(void) |
| 532 | { |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame^] | 533 | int err; |
| 534 | |
| 535 | #ifdef CONFIG_WIRELESS_OLD_REGULATORY |
| 536 | cfg80211_regdomain = |
| 537 | (struct ieee80211_regdomain *) static_regdom(ieee80211_regdom); |
| 538 | /* Used during reset_regdomains_static() */ |
| 539 | cfg80211_world_regdom = cfg80211_regdomain; |
| 540 | #else |
| 541 | cfg80211_regdomain = |
| 542 | (struct ieee80211_regdomain *) cfg80211_world_regdom; |
| 543 | #endif |
| 544 | |
| 545 | err = wiphy_sysfs_init(); |
Johannes Berg | 704232c | 2007-04-23 12:20:05 -0700 | [diff] [blame] | 546 | if (err) |
| 547 | goto out_fail_sysfs; |
| 548 | |
| 549 | err = register_netdevice_notifier(&cfg80211_netdev_notifier); |
| 550 | if (err) |
| 551 | goto out_fail_notifier; |
| 552 | |
Johannes Berg | 5568296 | 2007-09-20 13:09:35 -0400 | [diff] [blame] | 553 | err = nl80211_init(); |
| 554 | if (err) |
| 555 | goto out_fail_nl80211; |
| 556 | |
Johannes Berg | 704232c | 2007-04-23 12:20:05 -0700 | [diff] [blame] | 557 | ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); |
| 558 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame^] | 559 | err = regulatory_init(); |
| 560 | if (err) |
| 561 | goto out_fail_reg; |
| 562 | |
| 563 | #ifdef CONFIG_WIRELESS_OLD_REGULATORY |
| 564 | printk(KERN_INFO "cfg80211: Using old static regulatory domain:\n"); |
| 565 | print_regdomain_info(cfg80211_regdomain); |
| 566 | /* The old code still requests for a new regdomain and if |
| 567 | * you have CRDA you get it updated, otherwise you get |
| 568 | * stuck with the static values. We ignore "EU" code as |
| 569 | * that is not a valid ISO / IEC 3166 alpha2 */ |
| 570 | if (ieee80211_regdom[0] != 'E' && |
| 571 | ieee80211_regdom[1] != 'U') |
| 572 | err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE, |
| 573 | ieee80211_regdom, NULL); |
| 574 | #else |
| 575 | err = __regulatory_hint(NULL, REGDOM_SET_BY_CORE, "00", NULL); |
| 576 | if (err) |
| 577 | printk(KERN_ERR "cfg80211: calling CRDA failed - " |
| 578 | "unable to update world regulatory domain, " |
| 579 | "using static definition\n"); |
| 580 | #endif |
| 581 | |
Johannes Berg | 704232c | 2007-04-23 12:20:05 -0700 | [diff] [blame] | 582 | return 0; |
| 583 | |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame^] | 584 | out_fail_reg: |
| 585 | debugfs_remove(ieee80211_debugfs_dir); |
Johannes Berg | 5568296 | 2007-09-20 13:09:35 -0400 | [diff] [blame] | 586 | out_fail_nl80211: |
| 587 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); |
Johannes Berg | 704232c | 2007-04-23 12:20:05 -0700 | [diff] [blame] | 588 | out_fail_notifier: |
| 589 | wiphy_sysfs_exit(); |
| 590 | out_fail_sysfs: |
| 591 | return err; |
| 592 | } |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame^] | 593 | |
Johannes Berg | 3a46246 | 2007-09-10 13:44:45 +0200 | [diff] [blame] | 594 | subsys_initcall(cfg80211_init); |
Johannes Berg | 704232c | 2007-04-23 12:20:05 -0700 | [diff] [blame] | 595 | |
| 596 | static void cfg80211_exit(void) |
| 597 | { |
| 598 | debugfs_remove(ieee80211_debugfs_dir); |
Johannes Berg | 5568296 | 2007-09-20 13:09:35 -0400 | [diff] [blame] | 599 | nl80211_exit(); |
Johannes Berg | 704232c | 2007-04-23 12:20:05 -0700 | [diff] [blame] | 600 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); |
| 601 | wiphy_sysfs_exit(); |
Luis R. Rodriguez | b2e1b30 | 2008-09-09 23:19:48 -0700 | [diff] [blame^] | 602 | regulatory_exit(); |
Johannes Berg | 704232c | 2007-04-23 12:20:05 -0700 | [diff] [blame] | 603 | } |
| 604 | module_exit(cfg80211_exit); |