Commit | Line | Data |
---|---|---|
704232c2 JB |
1 | /* |
2 | * This is the linux wireless configuration interface. | |
3 | * | |
5f2aa25e | 4 | * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net> |
704232c2 JB |
5 | */ |
6 | ||
7 | #include <linux/if.h> | |
8 | #include <linux/module.h> | |
9 | #include <linux/err.h> | |
704232c2 JB |
10 | #include <linux/list.h> |
11 | #include <linux/nl80211.h> | |
12 | #include <linux/debugfs.h> | |
13 | #include <linux/notifier.h> | |
14 | #include <linux/device.h> | |
16a832e7 | 15 | #include <linux/etherdevice.h> |
1f87f7d3 | 16 | #include <linux/rtnetlink.h> |
d43c36dc | 17 | #include <linux/sched.h> |
704232c2 JB |
18 | #include <net/genetlink.h> |
19 | #include <net/cfg80211.h> | |
55682965 | 20 | #include "nl80211.h" |
704232c2 JB |
21 | #include "core.h" |
22 | #include "sysfs.h" | |
1ac61302 | 23 | #include "debugfs.h" |
a9a11622 | 24 | #include "wext-compat.h" |
4890e3be | 25 | #include "ethtool.h" |
704232c2 JB |
26 | |
27 | /* name for sysfs, %d is appended */ | |
28 | #define PHY_NAME "phy" | |
29 | ||
30 | MODULE_AUTHOR("Johannes Berg"); | |
31 | MODULE_LICENSE("GPL"); | |
32 | MODULE_DESCRIPTION("wireless configuration support"); | |
33 | ||
5f2aa25e | 34 | /* RCU-protected (and cfg80211_mutex for writers) */ |
79c97e97 | 35 | LIST_HEAD(cfg80211_rdev_list); |
f5ea9120 | 36 | int cfg80211_rdev_list_generation; |
a1794390 | 37 | |
a1794390 | 38 | DEFINE_MUTEX(cfg80211_mutex); |
704232c2 JB |
39 | |
40 | /* for debugfs */ | |
41 | static struct dentry *ieee80211_debugfs_dir; | |
42 | ||
e60d7443 AB |
43 | /* for the cleanup, scan and event works */ |
44 | struct workqueue_struct *cfg80211_wq; | |
45 | ||
806a9e39 | 46 | /* requires cfg80211_mutex to be held! */ |
79c97e97 | 47 | struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx) |
55682965 | 48 | { |
79c97e97 | 49 | struct cfg80211_registered_device *result = NULL, *rdev; |
55682965 | 50 | |
85fd129a LR |
51 | if (!wiphy_idx_valid(wiphy_idx)) |
52 | return NULL; | |
53 | ||
761cf7ec LR |
54 | assert_cfg80211_lock(); |
55 | ||
79c97e97 JB |
56 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
57 | if (rdev->wiphy_idx == wiphy_idx) { | |
58 | result = rdev; | |
55682965 JB |
59 | break; |
60 | } | |
61 | } | |
62 | ||
63 | return result; | |
64 | } | |
65 | ||
806a9e39 LR |
66 | int get_wiphy_idx(struct wiphy *wiphy) |
67 | { | |
79c97e97 | 68 | struct cfg80211_registered_device *rdev; |
806a9e39 LR |
69 | if (!wiphy) |
70 | return WIPHY_IDX_STALE; | |
79c97e97 JB |
71 | rdev = wiphy_to_dev(wiphy); |
72 | return rdev->wiphy_idx; | |
806a9e39 LR |
73 | } |
74 | ||
79c97e97 | 75 | /* requires cfg80211_rdev_mutex to be held! */ |
806a9e39 LR |
76 | struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx) |
77 | { | |
79c97e97 | 78 | struct cfg80211_registered_device *rdev; |
806a9e39 LR |
79 | |
80 | if (!wiphy_idx_valid(wiphy_idx)) | |
81 | return NULL; | |
82 | ||
83 | assert_cfg80211_lock(); | |
84 | ||
79c97e97 JB |
85 | rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx); |
86 | if (!rdev) | |
806a9e39 | 87 | return NULL; |
79c97e97 | 88 | return &rdev->wiphy; |
806a9e39 LR |
89 | } |
90 | ||
a1794390 | 91 | /* requires cfg80211_mutex to be held! */ |
4bbf4d56 | 92 | struct cfg80211_registered_device * |
79c97e97 | 93 | __cfg80211_rdev_from_info(struct genl_info *info) |
55682965 JB |
94 | { |
95 | int ifindex; | |
b5850a7a | 96 | struct cfg80211_registered_device *bywiphyidx = NULL, *byifidx = NULL; |
55682965 JB |
97 | struct net_device *dev; |
98 | int err = -EINVAL; | |
99 | ||
761cf7ec LR |
100 | assert_cfg80211_lock(); |
101 | ||
55682965 | 102 | if (info->attrs[NL80211_ATTR_WIPHY]) { |
79c97e97 | 103 | bywiphyidx = cfg80211_rdev_by_wiphy_idx( |
55682965 JB |
104 | nla_get_u32(info->attrs[NL80211_ATTR_WIPHY])); |
105 | err = -ENODEV; | |
106 | } | |
107 | ||
108 | if (info->attrs[NL80211_ATTR_IFINDEX]) { | |
109 | ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]); | |
463d0183 | 110 | dev = dev_get_by_index(genl_info_net(info), ifindex); |
55682965 JB |
111 | if (dev) { |
112 | if (dev->ieee80211_ptr) | |
113 | byifidx = | |
114 | wiphy_to_dev(dev->ieee80211_ptr->wiphy); | |
115 | dev_put(dev); | |
116 | } | |
117 | err = -ENODEV; | |
118 | } | |
119 | ||
b5850a7a LR |
120 | if (bywiphyidx && byifidx) { |
121 | if (bywiphyidx != byifidx) | |
55682965 JB |
122 | return ERR_PTR(-EINVAL); |
123 | else | |
b5850a7a | 124 | return bywiphyidx; /* == byifidx */ |
55682965 | 125 | } |
b5850a7a LR |
126 | if (bywiphyidx) |
127 | return bywiphyidx; | |
55682965 JB |
128 | |
129 | if (byifidx) | |
130 | return byifidx; | |
131 | ||
132 | return ERR_PTR(err); | |
133 | } | |
134 | ||
135 | struct cfg80211_registered_device * | |
136 | cfg80211_get_dev_from_info(struct genl_info *info) | |
137 | { | |
79c97e97 | 138 | struct cfg80211_registered_device *rdev; |
55682965 | 139 | |
a1794390 | 140 | mutex_lock(&cfg80211_mutex); |
79c97e97 | 141 | rdev = __cfg80211_rdev_from_info(info); |
55682965 JB |
142 | |
143 | /* if it is not an error we grab the lock on | |
144 | * it to assure it won't be going away while | |
145 | * we operate on it */ | |
79c97e97 JB |
146 | if (!IS_ERR(rdev)) |
147 | mutex_lock(&rdev->mtx); | |
55682965 | 148 | |
a1794390 | 149 | mutex_unlock(&cfg80211_mutex); |
55682965 | 150 | |
79c97e97 | 151 | return rdev; |
55682965 JB |
152 | } |
153 | ||
154 | struct cfg80211_registered_device * | |
463d0183 | 155 | cfg80211_get_dev_from_ifindex(struct net *net, int ifindex) |
55682965 | 156 | { |
79c97e97 | 157 | struct cfg80211_registered_device *rdev = ERR_PTR(-ENODEV); |
55682965 JB |
158 | struct net_device *dev; |
159 | ||
a1794390 | 160 | mutex_lock(&cfg80211_mutex); |
463d0183 | 161 | dev = dev_get_by_index(net, ifindex); |
55682965 JB |
162 | if (!dev) |
163 | goto out; | |
164 | if (dev->ieee80211_ptr) { | |
79c97e97 JB |
165 | rdev = wiphy_to_dev(dev->ieee80211_ptr->wiphy); |
166 | mutex_lock(&rdev->mtx); | |
55682965 | 167 | } else |
79c97e97 | 168 | rdev = ERR_PTR(-ENODEV); |
55682965 JB |
169 | dev_put(dev); |
170 | out: | |
a1794390 | 171 | mutex_unlock(&cfg80211_mutex); |
79c97e97 | 172 | return rdev; |
55682965 JB |
173 | } |
174 | ||
4bbf4d56 | 175 | /* requires cfg80211_mutex to be held */ |
55682965 JB |
176 | int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, |
177 | char *newname) | |
178 | { | |
79c97e97 | 179 | struct cfg80211_registered_device *rdev2; |
b5850a7a | 180 | int wiphy_idx, taken = -1, result, digits; |
55682965 | 181 | |
4bbf4d56 | 182 | assert_cfg80211_lock(); |
2940bb69 | 183 | |
55682965 | 184 | /* prohibit calling the thing phy%d when %d is not its number */ |
b5850a7a LR |
185 | sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken); |
186 | if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) { | |
187 | /* count number of places needed to print wiphy_idx */ | |
55682965 | 188 | digits = 1; |
b5850a7a | 189 | while (wiphy_idx /= 10) |
55682965 JB |
190 | digits++; |
191 | /* | |
192 | * deny the name if it is phy<idx> where <idx> is printed | |
193 | * without leading zeroes. taken == strlen(newname) here | |
194 | */ | |
195 | if (taken == strlen(PHY_NAME) + digits) | |
4bbf4d56 | 196 | return -EINVAL; |
2940bb69 EB |
197 | } |
198 | ||
199 | ||
200 | /* Ignore nop renames */ | |
2940bb69 | 201 | if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0) |
4bbf4d56 | 202 | return 0; |
2940bb69 EB |
203 | |
204 | /* Ensure another device does not already have this name. */ | |
79c97e97 JB |
205 | list_for_each_entry(rdev2, &cfg80211_rdev_list, list) |
206 | if (strcmp(newname, dev_name(&rdev2->wiphy.dev)) == 0) | |
4bbf4d56 | 207 | return -EINVAL; |
55682965 | 208 | |
55682965 JB |
209 | result = device_rename(&rdev->wiphy.dev, newname); |
210 | if (result) | |
4bbf4d56 | 211 | return result; |
55682965 | 212 | |
33c0360b JB |
213 | if (rdev->wiphy.debugfsdir && |
214 | !debugfs_rename(rdev->wiphy.debugfsdir->d_parent, | |
55682965 JB |
215 | rdev->wiphy.debugfsdir, |
216 | rdev->wiphy.debugfsdir->d_parent, | |
217 | newname)) | |
218 | printk(KERN_ERR "cfg80211: failed to rename debugfs dir to %s!\n", | |
219 | newname); | |
220 | ||
4bbf4d56 | 221 | nl80211_notify_dev_rename(rdev); |
55682965 | 222 | |
4bbf4d56 | 223 | return 0; |
55682965 JB |
224 | } |
225 | ||
463d0183 JB |
226 | int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, |
227 | struct net *net) | |
228 | { | |
229 | struct wireless_dev *wdev; | |
230 | int err = 0; | |
231 | ||
5be83de5 | 232 | if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK)) |
463d0183 JB |
233 | return -EOPNOTSUPP; |
234 | ||
235 | list_for_each_entry(wdev, &rdev->netdev_list, list) { | |
236 | wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; | |
237 | err = dev_change_net_namespace(wdev->netdev, net, "wlan%d"); | |
238 | if (err) | |
239 | break; | |
240 | wdev->netdev->features |= NETIF_F_NETNS_LOCAL; | |
241 | } | |
242 | ||
243 | if (err) { | |
244 | /* failed -- clean up to old netns */ | |
245 | net = wiphy_net(&rdev->wiphy); | |
246 | ||
247 | list_for_each_entry_continue_reverse(wdev, &rdev->netdev_list, | |
248 | list) { | |
249 | wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; | |
250 | err = dev_change_net_namespace(wdev->netdev, net, | |
251 | "wlan%d"); | |
252 | WARN_ON(err); | |
253 | wdev->netdev->features |= NETIF_F_NETNS_LOCAL; | |
254 | } | |
255 | } | |
256 | ||
257 | wiphy_net_set(&rdev->wiphy, net); | |
258 | ||
259 | return err; | |
260 | } | |
261 | ||
1f87f7d3 JB |
262 | static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data) |
263 | { | |
79c97e97 | 264 | struct cfg80211_registered_device *rdev = data; |
1f87f7d3 | 265 | |
79c97e97 | 266 | rdev->ops->rfkill_poll(&rdev->wiphy); |
1f87f7d3 JB |
267 | } |
268 | ||
269 | static int cfg80211_rfkill_set_block(void *data, bool blocked) | |
270 | { | |
79c97e97 | 271 | struct cfg80211_registered_device *rdev = data; |
1f87f7d3 JB |
272 | struct wireless_dev *wdev; |
273 | ||
274 | if (!blocked) | |
275 | return 0; | |
276 | ||
277 | rtnl_lock(); | |
79c97e97 | 278 | mutex_lock(&rdev->devlist_mtx); |
1f87f7d3 | 279 | |
79c97e97 | 280 | list_for_each_entry(wdev, &rdev->netdev_list, list) |
1f87f7d3 JB |
281 | dev_close(wdev->netdev); |
282 | ||
79c97e97 | 283 | mutex_unlock(&rdev->devlist_mtx); |
1f87f7d3 JB |
284 | rtnl_unlock(); |
285 | ||
286 | return 0; | |
287 | } | |
288 | ||
289 | static void cfg80211_rfkill_sync_work(struct work_struct *work) | |
290 | { | |
79c97e97 | 291 | struct cfg80211_registered_device *rdev; |
1f87f7d3 | 292 | |
79c97e97 JB |
293 | rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync); |
294 | cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill)); | |
1f87f7d3 JB |
295 | } |
296 | ||
667503dd JB |
297 | static void cfg80211_event_work(struct work_struct *work) |
298 | { | |
299 | struct cfg80211_registered_device *rdev; | |
667503dd JB |
300 | |
301 | rdev = container_of(work, struct cfg80211_registered_device, | |
302 | event_work); | |
303 | ||
304 | rtnl_lock(); | |
305 | cfg80211_lock_rdev(rdev); | |
667503dd | 306 | |
3d54d255 | 307 | cfg80211_process_rdev_events(rdev); |
667503dd JB |
308 | cfg80211_unlock_rdev(rdev); |
309 | rtnl_unlock(); | |
310 | } | |
311 | ||
704232c2 JB |
312 | /* exported functions */ |
313 | ||
3dcf670b | 314 | struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv) |
704232c2 | 315 | { |
638af073 DC |
316 | static int wiphy_counter; |
317 | ||
79c97e97 | 318 | struct cfg80211_registered_device *rdev; |
704232c2 JB |
319 | int alloc_size; |
320 | ||
0b20633d JB |
321 | WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key)); |
322 | WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc)); | |
323 | WARN_ON(ops->connect && !ops->disconnect); | |
324 | WARN_ON(ops->join_ibss && !ops->leave_ibss); | |
325 | WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf); | |
326 | WARN_ON(ops->add_station && !ops->del_station); | |
327 | WARN_ON(ops->add_mpath && !ops->del_mpath); | |
41ade00f | 328 | |
79c97e97 | 329 | alloc_size = sizeof(*rdev) + sizeof_priv; |
704232c2 | 330 | |
79c97e97 JB |
331 | rdev = kzalloc(alloc_size, GFP_KERNEL); |
332 | if (!rdev) | |
704232c2 JB |
333 | return NULL; |
334 | ||
79c97e97 | 335 | rdev->ops = ops; |
704232c2 | 336 | |
a1794390 | 337 | mutex_lock(&cfg80211_mutex); |
704232c2 | 338 | |
79c97e97 | 339 | rdev->wiphy_idx = wiphy_counter++; |
a4d73ee1 | 340 | |
79c97e97 | 341 | if (unlikely(!wiphy_idx_valid(rdev->wiphy_idx))) { |
638af073 | 342 | wiphy_counter--; |
a1794390 | 343 | mutex_unlock(&cfg80211_mutex); |
704232c2 | 344 | /* ugh, wrapped! */ |
79c97e97 | 345 | kfree(rdev); |
704232c2 JB |
346 | return NULL; |
347 | } | |
704232c2 | 348 | |
a1794390 | 349 | mutex_unlock(&cfg80211_mutex); |
638af073 | 350 | |
704232c2 | 351 | /* give it a proper name */ |
79c97e97 JB |
352 | dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx); |
353 | ||
354 | mutex_init(&rdev->mtx); | |
355 | mutex_init(&rdev->devlist_mtx); | |
356 | INIT_LIST_HEAD(&rdev->netdev_list); | |
357 | spin_lock_init(&rdev->bss_lock); | |
358 | INIT_LIST_HEAD(&rdev->bss_list); | |
359 | INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done); | |
360 | ||
3d23e349 JB |
361 | #ifdef CONFIG_CFG80211_WEXT |
362 | rdev->wiphy.wext = &cfg80211_wext_handler; | |
363 | #endif | |
364 | ||
79c97e97 JB |
365 | device_initialize(&rdev->wiphy.dev); |
366 | rdev->wiphy.dev.class = &ieee80211_class; | |
367 | rdev->wiphy.dev.platform_data = rdev; | |
368 | ||
5be83de5 JB |
369 | #ifdef CONFIG_CFG80211_DEFAULT_PS |
370 | rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; | |
371 | #endif | |
16cb9d42 | 372 | |
463d0183 JB |
373 | wiphy_net_set(&rdev->wiphy, &init_net); |
374 | ||
79c97e97 JB |
375 | rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block; |
376 | rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev), | |
377 | &rdev->wiphy.dev, RFKILL_TYPE_WLAN, | |
378 | &rdev->rfkill_ops, rdev); | |
379 | ||
380 | if (!rdev->rfkill) { | |
381 | kfree(rdev); | |
1f87f7d3 JB |
382 | return NULL; |
383 | } | |
384 | ||
79c97e97 JB |
385 | INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work); |
386 | INIT_WORK(&rdev->conn_work, cfg80211_conn_work); | |
387 | INIT_WORK(&rdev->event_work, cfg80211_event_work); | |
1f87f7d3 | 388 | |
ad002395 JB |
389 | init_waitqueue_head(&rdev->dev_wait); |
390 | ||
b9a5f8ca JM |
391 | /* |
392 | * Initialize wiphy parameters to IEEE 802.11 MIB default values. | |
393 | * Fragmentation and RTS threshold are disabled by default with the | |
394 | * special -1 value. | |
395 | */ | |
79c97e97 JB |
396 | rdev->wiphy.retry_short = 7; |
397 | rdev->wiphy.retry_long = 4; | |
398 | rdev->wiphy.frag_threshold = (u32) -1; | |
399 | rdev->wiphy.rts_threshold = (u32) -1; | |
81077e82 | 400 | rdev->wiphy.coverage_class = 0; |
b9a5f8ca | 401 | |
79c97e97 | 402 | return &rdev->wiphy; |
704232c2 JB |
403 | } |
404 | EXPORT_SYMBOL(wiphy_new); | |
405 | ||
406 | int wiphy_register(struct wiphy *wiphy) | |
407 | { | |
79c97e97 | 408 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
704232c2 | 409 | int res; |
8318d78a JB |
410 | enum ieee80211_band band; |
411 | struct ieee80211_supported_band *sband; | |
412 | bool have_band = false; | |
413 | int i; | |
f59ac048 LR |
414 | u16 ifmodes = wiphy->interface_modes; |
415 | ||
ef15aac6 JB |
416 | if (WARN_ON(wiphy->addresses && !wiphy->n_addresses)) |
417 | return -EINVAL; | |
418 | ||
419 | if (WARN_ON(wiphy->addresses && | |
420 | !is_zero_ether_addr(wiphy->perm_addr) && | |
421 | memcmp(wiphy->perm_addr, wiphy->addresses[0].addr, | |
422 | ETH_ALEN))) | |
423 | return -EINVAL; | |
424 | ||
425 | if (wiphy->addresses) | |
426 | memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN); | |
427 | ||
f59ac048 LR |
428 | /* sanity check ifmodes */ |
429 | WARN_ON(!ifmodes); | |
430 | ifmodes &= ((1 << __NL80211_IFTYPE_AFTER_LAST) - 1) & ~1; | |
431 | if (WARN_ON(ifmodes != wiphy->interface_modes)) | |
432 | wiphy->interface_modes = ifmodes; | |
8318d78a JB |
433 | |
434 | /* sanity check supported bands/channels */ | |
435 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
436 | sband = wiphy->bands[band]; | |
437 | if (!sband) | |
438 | continue; | |
439 | ||
440 | sband->band = band; | |
441 | ||
881d948c JB |
442 | if (WARN_ON(!sband->n_channels || !sband->n_bitrates)) |
443 | return -EINVAL; | |
444 | ||
445 | /* | |
446 | * Since we use a u32 for rate bitmaps in | |
447 | * ieee80211_get_response_rate, we cannot | |
448 | * have more than 32 legacy rates. | |
449 | */ | |
450 | if (WARN_ON(sband->n_bitrates > 32)) | |
8318d78a | 451 | return -EINVAL; |
8318d78a JB |
452 | |
453 | for (i = 0; i < sband->n_channels; i++) { | |
454 | sband->channels[i].orig_flags = | |
455 | sband->channels[i].flags; | |
456 | sband->channels[i].orig_mag = | |
457 | sband->channels[i].max_antenna_gain; | |
458 | sband->channels[i].orig_mpwr = | |
459 | sband->channels[i].max_power; | |
460 | sband->channels[i].band = band; | |
461 | } | |
462 | ||
463 | have_band = true; | |
464 | } | |
465 | ||
466 | if (!have_band) { | |
467 | WARN_ON(1); | |
468 | return -EINVAL; | |
469 | } | |
470 | ||
471 | /* check and set up bitrates */ | |
472 | ieee80211_set_bitrate_flags(wiphy); | |
473 | ||
79c97e97 | 474 | res = device_add(&rdev->wiphy.dev); |
704232c2 | 475 | if (res) |
2f0accc1 | 476 | return res; |
704232c2 | 477 | |
79c97e97 | 478 | res = rfkill_register(rdev->rfkill); |
1f87f7d3 JB |
479 | if (res) |
480 | goto out_rm_dev; | |
481 | ||
2f0accc1 JB |
482 | mutex_lock(&cfg80211_mutex); |
483 | ||
484 | /* set up regulatory info */ | |
485 | wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE); | |
486 | ||
5f2aa25e | 487 | list_add_rcu(&rdev->list, &cfg80211_rdev_list); |
f5ea9120 | 488 | cfg80211_rdev_list_generation++; |
704232c2 | 489 | |
2f0accc1 JB |
490 | mutex_unlock(&cfg80211_mutex); |
491 | ||
704232c2 | 492 | /* add to debugfs */ |
79c97e97 JB |
493 | rdev->wiphy.debugfsdir = |
494 | debugfs_create_dir(wiphy_name(&rdev->wiphy), | |
704232c2 | 495 | ieee80211_debugfs_dir); |
79c97e97 JB |
496 | if (IS_ERR(rdev->wiphy.debugfsdir)) |
497 | rdev->wiphy.debugfsdir = NULL; | |
704232c2 | 498 | |
5be83de5 | 499 | if (wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { |
73d54c9e LR |
500 | struct regulatory_request request; |
501 | ||
502 | request.wiphy_idx = get_wiphy_idx(wiphy); | |
503 | request.initiator = NL80211_REGDOM_SET_BY_DRIVER; | |
504 | request.alpha2[0] = '9'; | |
505 | request.alpha2[1] = '9'; | |
506 | ||
507 | nl80211_send_reg_change_event(&request); | |
508 | } | |
509 | ||
79c97e97 | 510 | cfg80211_debugfs_rdev_add(rdev); |
1ac61302 | 511 | |
2f0accc1 | 512 | return 0; |
1f87f7d3 JB |
513 | |
514 | out_rm_dev: | |
79c97e97 | 515 | device_del(&rdev->wiphy.dev); |
704232c2 JB |
516 | return res; |
517 | } | |
518 | EXPORT_SYMBOL(wiphy_register); | |
519 | ||
1f87f7d3 JB |
520 | void wiphy_rfkill_start_polling(struct wiphy *wiphy) |
521 | { | |
79c97e97 | 522 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 523 | |
79c97e97 | 524 | if (!rdev->ops->rfkill_poll) |
1f87f7d3 | 525 | return; |
79c97e97 JB |
526 | rdev->rfkill_ops.poll = cfg80211_rfkill_poll; |
527 | rfkill_resume_polling(rdev->rfkill); | |
1f87f7d3 JB |
528 | } |
529 | EXPORT_SYMBOL(wiphy_rfkill_start_polling); | |
530 | ||
531 | void wiphy_rfkill_stop_polling(struct wiphy *wiphy) | |
532 | { | |
79c97e97 | 533 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 534 | |
79c97e97 | 535 | rfkill_pause_polling(rdev->rfkill); |
1f87f7d3 JB |
536 | } |
537 | EXPORT_SYMBOL(wiphy_rfkill_stop_polling); | |
538 | ||
704232c2 JB |
539 | void wiphy_unregister(struct wiphy *wiphy) |
540 | { | |
79c97e97 | 541 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
704232c2 | 542 | |
79c97e97 | 543 | rfkill_unregister(rdev->rfkill); |
1f87f7d3 | 544 | |
f16bfc1c | 545 | /* protect the device list */ |
a1794390 | 546 | mutex_lock(&cfg80211_mutex); |
704232c2 | 547 | |
ad002395 JB |
548 | wait_event(rdev->dev_wait, ({ |
549 | int __count; | |
550 | mutex_lock(&rdev->devlist_mtx); | |
551 | __count = rdev->opencount; | |
552 | mutex_unlock(&rdev->devlist_mtx); | |
553 | __count == 0;})); | |
554 | ||
555 | mutex_lock(&rdev->devlist_mtx); | |
79c97e97 | 556 | BUG_ON(!list_empty(&rdev->netdev_list)); |
ad002395 JB |
557 | mutex_unlock(&rdev->devlist_mtx); |
558 | ||
559 | /* | |
560 | * First remove the hardware from everywhere, this makes | |
561 | * it impossible to find from userspace. | |
562 | */ | |
7bcfaf2f | 563 | debugfs_remove_recursive(rdev->wiphy.debugfsdir); |
5f2aa25e JB |
564 | list_del_rcu(&rdev->list); |
565 | synchronize_rcu(); | |
f16bfc1c JB |
566 | |
567 | /* | |
79c97e97 | 568 | * Try to grab rdev->mtx. If a command is still in progress, |
f16bfc1c JB |
569 | * hopefully the driver will refuse it since it's tearing |
570 | * down the device already. We wait for this command to complete | |
571 | * before unlinking the item from the list. | |
572 | * Note: as codified by the BUG_ON above we cannot get here if | |
ad002395 JB |
573 | * a virtual interface is still present. Hence, we can only get |
574 | * to lock contention here if userspace issues a command that | |
575 | * identified the hardware by wiphy index. | |
f16bfc1c | 576 | */ |
0ff6ce7b | 577 | cfg80211_lock_rdev(rdev); |
ad002395 | 578 | /* nothing */ |
0ff6ce7b | 579 | cfg80211_unlock_rdev(rdev); |
704232c2 | 580 | |
3f2355cb LR |
581 | /* If this device got a regulatory hint tell core its |
582 | * free to listen now to a new shiny device regulatory hint */ | |
583 | reg_device_remove(wiphy); | |
584 | ||
f5ea9120 | 585 | cfg80211_rdev_list_generation++; |
79c97e97 | 586 | device_del(&rdev->wiphy.dev); |
704232c2 | 587 | |
a1794390 | 588 | mutex_unlock(&cfg80211_mutex); |
6682588a | 589 | |
36e6fea8 | 590 | flush_work(&rdev->scan_done_wk); |
6682588a | 591 | cancel_work_sync(&rdev->conn_work); |
6682588a | 592 | flush_work(&rdev->event_work); |
704232c2 JB |
593 | } |
594 | EXPORT_SYMBOL(wiphy_unregister); | |
595 | ||
79c97e97 | 596 | void cfg80211_dev_free(struct cfg80211_registered_device *rdev) |
704232c2 | 597 | { |
2a519311 | 598 | struct cfg80211_internal_bss *scan, *tmp; |
79c97e97 JB |
599 | rfkill_destroy(rdev->rfkill); |
600 | mutex_destroy(&rdev->mtx); | |
601 | mutex_destroy(&rdev->devlist_mtx); | |
602 | list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list) | |
78c1c7e1 | 603 | cfg80211_put_bss(&scan->pub); |
79c97e97 | 604 | kfree(rdev); |
704232c2 JB |
605 | } |
606 | ||
607 | void wiphy_free(struct wiphy *wiphy) | |
608 | { | |
609 | put_device(&wiphy->dev); | |
610 | } | |
611 | EXPORT_SYMBOL(wiphy_free); | |
612 | ||
1f87f7d3 JB |
613 | void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked) |
614 | { | |
79c97e97 | 615 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 616 | |
79c97e97 JB |
617 | if (rfkill_set_hw_state(rdev->rfkill, blocked)) |
618 | schedule_work(&rdev->rfkill_sync); | |
1f87f7d3 JB |
619 | } |
620 | EXPORT_SYMBOL(wiphy_rfkill_set_hw_state); | |
621 | ||
ad002395 JB |
622 | static void wdev_cleanup_work(struct work_struct *work) |
623 | { | |
624 | struct wireless_dev *wdev; | |
625 | struct cfg80211_registered_device *rdev; | |
626 | ||
627 | wdev = container_of(work, struct wireless_dev, cleanup_work); | |
628 | rdev = wiphy_to_dev(wdev->wiphy); | |
629 | ||
630 | cfg80211_lock_rdev(rdev); | |
631 | ||
632 | if (WARN_ON(rdev->scan_req && rdev->scan_req->dev == wdev->netdev)) { | |
633 | rdev->scan_req->aborted = true; | |
01a0ac41 | 634 | ___cfg80211_scan_done(rdev, true); |
ad002395 JB |
635 | } |
636 | ||
637 | cfg80211_unlock_rdev(rdev); | |
638 | ||
639 | mutex_lock(&rdev->devlist_mtx); | |
640 | rdev->opencount--; | |
641 | mutex_unlock(&rdev->devlist_mtx); | |
642 | wake_up(&rdev->dev_wait); | |
643 | ||
644 | dev_put(wdev->netdev); | |
645 | } | |
646 | ||
053a93dd MH |
647 | static struct device_type wiphy_type = { |
648 | .name = "wlan", | |
649 | }; | |
650 | ||
704232c2 JB |
651 | static int cfg80211_netdev_notifier_call(struct notifier_block * nb, |
652 | unsigned long state, | |
653 | void *ndev) | |
654 | { | |
655 | struct net_device *dev = ndev; | |
2a783c13 | 656 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
704232c2 JB |
657 | struct cfg80211_registered_device *rdev; |
658 | ||
2a783c13 | 659 | if (!wdev) |
1f87f7d3 | 660 | return NOTIFY_DONE; |
704232c2 | 661 | |
2a783c13 | 662 | rdev = wiphy_to_dev(wdev->wiphy); |
704232c2 | 663 | |
2a783c13 | 664 | WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); |
60719ffd | 665 | |
704232c2 | 666 | switch (state) { |
053a93dd MH |
667 | case NETDEV_POST_INIT: |
668 | SET_NETDEV_DEVTYPE(dev, &wiphy_type); | |
669 | break; | |
704232c2 | 670 | case NETDEV_REGISTER: |
0ff6ce7b JB |
671 | /* |
672 | * NB: cannot take rdev->mtx here because this may be | |
673 | * called within code protected by it when interfaces | |
674 | * are added with nl80211. | |
675 | */ | |
667503dd | 676 | mutex_init(&wdev->mtx); |
ad002395 | 677 | INIT_WORK(&wdev->cleanup_work, wdev_cleanup_work); |
667503dd JB |
678 | INIT_LIST_HEAD(&wdev->event_list); |
679 | spin_lock_init(&wdev->event_lock); | |
704232c2 | 680 | mutex_lock(&rdev->devlist_mtx); |
5f2aa25e | 681 | list_add_rcu(&wdev->list, &rdev->netdev_list); |
f5ea9120 | 682 | rdev->devlist_generation++; |
463d0183 JB |
683 | /* can only change netns with wiphy */ |
684 | dev->features |= NETIF_F_NETNS_LOCAL; | |
685 | ||
704232c2 JB |
686 | if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj, |
687 | "phy80211")) { | |
688 | printk(KERN_ERR "wireless: failed to add phy80211 " | |
689 | "symlink to netdev!\n"); | |
690 | } | |
2a783c13 | 691 | wdev->netdev = dev; |
b23aa676 | 692 | wdev->sme_state = CFG80211_SME_IDLE; |
bc92afd9 | 693 | mutex_unlock(&rdev->devlist_mtx); |
3d23e349 | 694 | #ifdef CONFIG_CFG80211_WEXT |
2a783c13 JB |
695 | wdev->wext.default_key = -1; |
696 | wdev->wext.default_mgmt_key = -1; | |
f2129354 | 697 | wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; |
5be83de5 JB |
698 | if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT) |
699 | wdev->wext.ps = true; | |
700 | else | |
701 | wdev->wext.ps = false; | |
75e6c3b7 | 702 | wdev->wext.ps_timeout = 100; |
bc92afd9 JB |
703 | if (rdev->ops->set_power_mgmt) |
704 | if (rdev->ops->set_power_mgmt(wdev->wiphy, dev, | |
705 | wdev->wext.ps, | |
706 | wdev->wext.ps_timeout)) { | |
707 | /* assume this means it's off */ | |
708 | wdev->wext.ps = false; | |
709 | } | |
08645126 | 710 | #endif |
4890e3be JL |
711 | if (!dev->ethtool_ops) |
712 | dev->ethtool_ops = &cfg80211_ethtool_ops; | |
ad4bb6f8 JB |
713 | |
714 | if ((wdev->iftype == NL80211_IFTYPE_STATION || | |
715 | wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr) | |
716 | dev->priv_flags |= IFF_DONT_BRIDGE; | |
704232c2 | 717 | break; |
04a773ad | 718 | case NETDEV_GOING_DOWN: |
b23aa676 SO |
719 | switch (wdev->iftype) { |
720 | case NL80211_IFTYPE_ADHOC: | |
721 | cfg80211_leave_ibss(rdev, dev, true); | |
722 | break; | |
723 | case NL80211_IFTYPE_STATION: | |
667503dd | 724 | wdev_lock(wdev); |
3d23e349 | 725 | #ifdef CONFIG_CFG80211_WEXT |
f2129354 JB |
726 | kfree(wdev->wext.ie); |
727 | wdev->wext.ie = NULL; | |
728 | wdev->wext.ie_len = 0; | |
0eb14647 | 729 | wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; |
f2129354 | 730 | #endif |
667503dd JB |
731 | __cfg80211_disconnect(rdev, dev, |
732 | WLAN_REASON_DEAUTH_LEAVING, true); | |
19957bb3 | 733 | cfg80211_mlme_down(rdev, dev); |
667503dd | 734 | wdev_unlock(wdev); |
b23aa676 SO |
735 | break; |
736 | default: | |
737 | break; | |
738 | } | |
01a0ac41 JB |
739 | break; |
740 | case NETDEV_DOWN: | |
ad002395 | 741 | dev_hold(dev); |
e60d7443 | 742 | queue_work(cfg80211_wq, &wdev->cleanup_work); |
04a773ad JB |
743 | break; |
744 | case NETDEV_UP: | |
ad002395 JB |
745 | /* |
746 | * If we have a really quick DOWN/UP succession we may | |
747 | * have this work still pending ... cancel it and see | |
748 | * if it was pending, in which case we need to account | |
749 | * for some of the work it would have done. | |
750 | */ | |
751 | if (cancel_work_sync(&wdev->cleanup_work)) { | |
752 | mutex_lock(&rdev->devlist_mtx); | |
753 | rdev->opencount--; | |
754 | mutex_unlock(&rdev->devlist_mtx); | |
755 | dev_put(dev); | |
756 | } | |
667503dd | 757 | cfg80211_lock_rdev(rdev); |
aee83eaf | 758 | mutex_lock(&rdev->devlist_mtx); |
8c5d9808 | 759 | #ifdef CONFIG_CFG80211_WEXT |
667503dd | 760 | wdev_lock(wdev); |
f2129354 JB |
761 | switch (wdev->iftype) { |
762 | case NL80211_IFTYPE_ADHOC: | |
fffd0934 | 763 | cfg80211_ibss_wext_join(rdev, wdev); |
04a773ad | 764 | break; |
f2129354 | 765 | case NL80211_IFTYPE_STATION: |
fffd0934 | 766 | cfg80211_mgd_wext_connect(rdev, wdev); |
f2129354 JB |
767 | break; |
768 | default: | |
04a773ad | 769 | break; |
f2129354 | 770 | } |
667503dd | 771 | wdev_unlock(wdev); |
8c5d9808 | 772 | #endif |
ad002395 | 773 | rdev->opencount++; |
aee83eaf | 774 | mutex_unlock(&rdev->devlist_mtx); |
667503dd | 775 | cfg80211_unlock_rdev(rdev); |
2a783c13 | 776 | break; |
704232c2 | 777 | case NETDEV_UNREGISTER: |
0ff6ce7b JB |
778 | /* |
779 | * NB: cannot take rdev->mtx here because this may be | |
780 | * called within code protected by it when interfaces | |
781 | * are removed with nl80211. | |
782 | */ | |
704232c2 | 783 | mutex_lock(&rdev->devlist_mtx); |
e40cbdac JB |
784 | /* |
785 | * It is possible to get NETDEV_UNREGISTER | |
786 | * multiple times. To detect that, check | |
787 | * that the interface is still on the list | |
788 | * of registered interfaces, and only then | |
789 | * remove and clean it up. | |
790 | */ | |
2a783c13 | 791 | if (!list_empty(&wdev->list)) { |
704232c2 | 792 | sysfs_remove_link(&dev->dev.kobj, "phy80211"); |
5f2aa25e | 793 | list_del_rcu(&wdev->list); |
f5ea9120 | 794 | rdev->devlist_generation++; |
3d23e349 | 795 | #ifdef CONFIG_CFG80211_WEXT |
e40cbdac | 796 | kfree(wdev->wext.keys); |
fffd0934 | 797 | #endif |
e40cbdac JB |
798 | } |
799 | mutex_unlock(&rdev->devlist_mtx); | |
5f2aa25e JB |
800 | /* |
801 | * synchronise (so that we won't find this netdev | |
802 | * from other code any more) and then clear the list | |
803 | * head so that the above code can safely check for | |
804 | * !list_empty() to avoid double-cleanup. | |
805 | */ | |
806 | synchronize_rcu(); | |
807 | INIT_LIST_HEAD(&wdev->list); | |
704232c2 | 808 | break; |
1f87f7d3 | 809 | case NETDEV_PRE_UP: |
0b20633d JB |
810 | if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype))) |
811 | return notifier_from_errno(-EOPNOTSUPP); | |
1f87f7d3 JB |
812 | if (rfkill_blocked(rdev->rfkill)) |
813 | return notifier_from_errno(-ERFKILL); | |
814 | break; | |
704232c2 JB |
815 | } |
816 | ||
1f87f7d3 | 817 | return NOTIFY_DONE; |
704232c2 JB |
818 | } |
819 | ||
820 | static struct notifier_block cfg80211_netdev_notifier = { | |
821 | .notifier_call = cfg80211_netdev_notifier_call, | |
822 | }; | |
823 | ||
463d0183 JB |
824 | static void __net_exit cfg80211_pernet_exit(struct net *net) |
825 | { | |
826 | struct cfg80211_registered_device *rdev; | |
827 | ||
828 | rtnl_lock(); | |
829 | mutex_lock(&cfg80211_mutex); | |
830 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
831 | if (net_eq(wiphy_net(&rdev->wiphy), net)) | |
832 | WARN_ON(cfg80211_switch_netns(rdev, &init_net)); | |
833 | } | |
834 | mutex_unlock(&cfg80211_mutex); | |
835 | rtnl_unlock(); | |
836 | } | |
837 | ||
838 | static struct pernet_operations cfg80211_pernet_ops = { | |
839 | .exit = cfg80211_pernet_exit, | |
840 | }; | |
841 | ||
842 | static int __init cfg80211_init(void) | |
704232c2 | 843 | { |
b2e1b302 LR |
844 | int err; |
845 | ||
463d0183 JB |
846 | err = register_pernet_device(&cfg80211_pernet_ops); |
847 | if (err) | |
848 | goto out_fail_pernet; | |
849 | ||
b2e1b302 | 850 | err = wiphy_sysfs_init(); |
704232c2 JB |
851 | if (err) |
852 | goto out_fail_sysfs; | |
853 | ||
854 | err = register_netdevice_notifier(&cfg80211_netdev_notifier); | |
855 | if (err) | |
856 | goto out_fail_notifier; | |
857 | ||
55682965 JB |
858 | err = nl80211_init(); |
859 | if (err) | |
860 | goto out_fail_nl80211; | |
861 | ||
704232c2 JB |
862 | ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); |
863 | ||
b2e1b302 LR |
864 | err = regulatory_init(); |
865 | if (err) | |
866 | goto out_fail_reg; | |
867 | ||
e60d7443 AB |
868 | cfg80211_wq = create_singlethread_workqueue("cfg80211"); |
869 | if (!cfg80211_wq) | |
870 | goto out_fail_wq; | |
871 | ||
704232c2 JB |
872 | return 0; |
873 | ||
e60d7443 AB |
874 | out_fail_wq: |
875 | regulatory_exit(); | |
b2e1b302 LR |
876 | out_fail_reg: |
877 | debugfs_remove(ieee80211_debugfs_dir); | |
55682965 JB |
878 | out_fail_nl80211: |
879 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); | |
704232c2 JB |
880 | out_fail_notifier: |
881 | wiphy_sysfs_exit(); | |
882 | out_fail_sysfs: | |
463d0183 JB |
883 | unregister_pernet_device(&cfg80211_pernet_ops); |
884 | out_fail_pernet: | |
704232c2 JB |
885 | return err; |
886 | } | |
3a462465 | 887 | subsys_initcall(cfg80211_init); |
704232c2 JB |
888 | |
889 | static void cfg80211_exit(void) | |
890 | { | |
891 | debugfs_remove(ieee80211_debugfs_dir); | |
55682965 | 892 | nl80211_exit(); |
704232c2 JB |
893 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); |
894 | wiphy_sysfs_exit(); | |
b2e1b302 | 895 | regulatory_exit(); |
463d0183 | 896 | unregister_pernet_device(&cfg80211_pernet_ops); |
e60d7443 | 897 | destroy_workqueue(cfg80211_wq); |
704232c2 JB |
898 | } |
899 | module_exit(cfg80211_exit); |