Commit | Line | Data |
---|---|---|
704232c2 JB |
1 | /* |
2 | * This is the linux wireless configuration interface. | |
3 | * | |
08645126 | 4 | * Copyright 2006-2009 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 | ||
34 | /* RCU might be appropriate here since we usually | |
35 | * only read the list, and that can happen quite | |
36 | * often because we need to do it for each command */ | |
79c97e97 | 37 | LIST_HEAD(cfg80211_rdev_list); |
f5ea9120 | 38 | int cfg80211_rdev_list_generation; |
a1794390 LR |
39 | |
40 | /* | |
abc7381b | 41 | * This is used to protect the cfg80211_rdev_list |
a1794390 LR |
42 | */ |
43 | DEFINE_MUTEX(cfg80211_mutex); | |
704232c2 JB |
44 | |
45 | /* for debugfs */ | |
46 | static struct dentry *ieee80211_debugfs_dir; | |
47 | ||
e60d7443 AB |
48 | /* for the cleanup, scan and event works */ |
49 | struct workqueue_struct *cfg80211_wq; | |
50 | ||
806a9e39 | 51 | /* requires cfg80211_mutex to be held! */ |
79c97e97 | 52 | struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx) |
55682965 | 53 | { |
79c97e97 | 54 | struct cfg80211_registered_device *result = NULL, *rdev; |
55682965 | 55 | |
85fd129a LR |
56 | if (!wiphy_idx_valid(wiphy_idx)) |
57 | return NULL; | |
58 | ||
761cf7ec LR |
59 | assert_cfg80211_lock(); |
60 | ||
79c97e97 JB |
61 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
62 | if (rdev->wiphy_idx == wiphy_idx) { | |
63 | result = rdev; | |
55682965 JB |
64 | break; |
65 | } | |
66 | } | |
67 | ||
68 | return result; | |
69 | } | |
70 | ||
806a9e39 LR |
71 | int get_wiphy_idx(struct wiphy *wiphy) |
72 | { | |
79c97e97 | 73 | struct cfg80211_registered_device *rdev; |
806a9e39 LR |
74 | if (!wiphy) |
75 | return WIPHY_IDX_STALE; | |
79c97e97 JB |
76 | rdev = wiphy_to_dev(wiphy); |
77 | return rdev->wiphy_idx; | |
806a9e39 LR |
78 | } |
79 | ||
79c97e97 | 80 | /* requires cfg80211_rdev_mutex to be held! */ |
806a9e39 LR |
81 | struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx) |
82 | { | |
79c97e97 | 83 | struct cfg80211_registered_device *rdev; |
806a9e39 LR |
84 | |
85 | if (!wiphy_idx_valid(wiphy_idx)) | |
86 | return NULL; | |
87 | ||
88 | assert_cfg80211_lock(); | |
89 | ||
79c97e97 JB |
90 | rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx); |
91 | if (!rdev) | |
806a9e39 | 92 | return NULL; |
79c97e97 | 93 | return &rdev->wiphy; |
806a9e39 LR |
94 | } |
95 | ||
a1794390 | 96 | /* requires cfg80211_mutex to be held! */ |
4bbf4d56 | 97 | struct cfg80211_registered_device * |
79c97e97 | 98 | __cfg80211_rdev_from_info(struct genl_info *info) |
55682965 JB |
99 | { |
100 | int ifindex; | |
b5850a7a | 101 | struct cfg80211_registered_device *bywiphyidx = NULL, *byifidx = NULL; |
55682965 JB |
102 | struct net_device *dev; |
103 | int err = -EINVAL; | |
104 | ||
761cf7ec LR |
105 | assert_cfg80211_lock(); |
106 | ||
55682965 | 107 | if (info->attrs[NL80211_ATTR_WIPHY]) { |
79c97e97 | 108 | bywiphyidx = cfg80211_rdev_by_wiphy_idx( |
55682965 JB |
109 | nla_get_u32(info->attrs[NL80211_ATTR_WIPHY])); |
110 | err = -ENODEV; | |
111 | } | |
112 | ||
113 | if (info->attrs[NL80211_ATTR_IFINDEX]) { | |
114 | ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]); | |
463d0183 | 115 | dev = dev_get_by_index(genl_info_net(info), ifindex); |
55682965 JB |
116 | if (dev) { |
117 | if (dev->ieee80211_ptr) | |
118 | byifidx = | |
119 | wiphy_to_dev(dev->ieee80211_ptr->wiphy); | |
120 | dev_put(dev); | |
121 | } | |
122 | err = -ENODEV; | |
123 | } | |
124 | ||
b5850a7a LR |
125 | if (bywiphyidx && byifidx) { |
126 | if (bywiphyidx != byifidx) | |
55682965 JB |
127 | return ERR_PTR(-EINVAL); |
128 | else | |
b5850a7a | 129 | return bywiphyidx; /* == byifidx */ |
55682965 | 130 | } |
b5850a7a LR |
131 | if (bywiphyidx) |
132 | return bywiphyidx; | |
55682965 JB |
133 | |
134 | if (byifidx) | |
135 | return byifidx; | |
136 | ||
137 | return ERR_PTR(err); | |
138 | } | |
139 | ||
140 | struct cfg80211_registered_device * | |
141 | cfg80211_get_dev_from_info(struct genl_info *info) | |
142 | { | |
79c97e97 | 143 | struct cfg80211_registered_device *rdev; |
55682965 | 144 | |
a1794390 | 145 | mutex_lock(&cfg80211_mutex); |
79c97e97 | 146 | rdev = __cfg80211_rdev_from_info(info); |
55682965 JB |
147 | |
148 | /* if it is not an error we grab the lock on | |
149 | * it to assure it won't be going away while | |
150 | * we operate on it */ | |
79c97e97 JB |
151 | if (!IS_ERR(rdev)) |
152 | mutex_lock(&rdev->mtx); | |
55682965 | 153 | |
a1794390 | 154 | mutex_unlock(&cfg80211_mutex); |
55682965 | 155 | |
79c97e97 | 156 | return rdev; |
55682965 JB |
157 | } |
158 | ||
159 | struct cfg80211_registered_device * | |
463d0183 | 160 | cfg80211_get_dev_from_ifindex(struct net *net, int ifindex) |
55682965 | 161 | { |
79c97e97 | 162 | struct cfg80211_registered_device *rdev = ERR_PTR(-ENODEV); |
55682965 JB |
163 | struct net_device *dev; |
164 | ||
a1794390 | 165 | mutex_lock(&cfg80211_mutex); |
463d0183 | 166 | dev = dev_get_by_index(net, ifindex); |
55682965 JB |
167 | if (!dev) |
168 | goto out; | |
169 | if (dev->ieee80211_ptr) { | |
79c97e97 JB |
170 | rdev = wiphy_to_dev(dev->ieee80211_ptr->wiphy); |
171 | mutex_lock(&rdev->mtx); | |
55682965 | 172 | } else |
79c97e97 | 173 | rdev = ERR_PTR(-ENODEV); |
55682965 JB |
174 | dev_put(dev); |
175 | out: | |
a1794390 | 176 | mutex_unlock(&cfg80211_mutex); |
79c97e97 | 177 | return rdev; |
55682965 JB |
178 | } |
179 | ||
4bbf4d56 | 180 | /* requires cfg80211_mutex to be held */ |
55682965 JB |
181 | int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, |
182 | char *newname) | |
183 | { | |
79c97e97 | 184 | struct cfg80211_registered_device *rdev2; |
b5850a7a | 185 | int wiphy_idx, taken = -1, result, digits; |
55682965 | 186 | |
4bbf4d56 | 187 | assert_cfg80211_lock(); |
2940bb69 | 188 | |
55682965 | 189 | /* prohibit calling the thing phy%d when %d is not its number */ |
b5850a7a LR |
190 | sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken); |
191 | if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) { | |
192 | /* count number of places needed to print wiphy_idx */ | |
55682965 | 193 | digits = 1; |
b5850a7a | 194 | while (wiphy_idx /= 10) |
55682965 JB |
195 | digits++; |
196 | /* | |
197 | * deny the name if it is phy<idx> where <idx> is printed | |
198 | * without leading zeroes. taken == strlen(newname) here | |
199 | */ | |
200 | if (taken == strlen(PHY_NAME) + digits) | |
4bbf4d56 | 201 | return -EINVAL; |
2940bb69 EB |
202 | } |
203 | ||
204 | ||
205 | /* Ignore nop renames */ | |
2940bb69 | 206 | if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0) |
4bbf4d56 | 207 | return 0; |
2940bb69 EB |
208 | |
209 | /* Ensure another device does not already have this name. */ | |
79c97e97 JB |
210 | list_for_each_entry(rdev2, &cfg80211_rdev_list, list) |
211 | if (strcmp(newname, dev_name(&rdev2->wiphy.dev)) == 0) | |
4bbf4d56 | 212 | return -EINVAL; |
55682965 | 213 | |
55682965 JB |
214 | result = device_rename(&rdev->wiphy.dev, newname); |
215 | if (result) | |
4bbf4d56 | 216 | return result; |
55682965 | 217 | |
33c0360b JB |
218 | if (rdev->wiphy.debugfsdir && |
219 | !debugfs_rename(rdev->wiphy.debugfsdir->d_parent, | |
55682965 JB |
220 | rdev->wiphy.debugfsdir, |
221 | rdev->wiphy.debugfsdir->d_parent, | |
222 | newname)) | |
223 | printk(KERN_ERR "cfg80211: failed to rename debugfs dir to %s!\n", | |
224 | newname); | |
225 | ||
4bbf4d56 | 226 | nl80211_notify_dev_rename(rdev); |
55682965 | 227 | |
4bbf4d56 | 228 | return 0; |
55682965 JB |
229 | } |
230 | ||
463d0183 JB |
231 | int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, |
232 | struct net *net) | |
233 | { | |
234 | struct wireless_dev *wdev; | |
235 | int err = 0; | |
236 | ||
5be83de5 | 237 | if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK)) |
463d0183 JB |
238 | return -EOPNOTSUPP; |
239 | ||
240 | list_for_each_entry(wdev, &rdev->netdev_list, list) { | |
241 | wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; | |
242 | err = dev_change_net_namespace(wdev->netdev, net, "wlan%d"); | |
243 | if (err) | |
244 | break; | |
245 | wdev->netdev->features |= NETIF_F_NETNS_LOCAL; | |
246 | } | |
247 | ||
248 | if (err) { | |
249 | /* failed -- clean up to old netns */ | |
250 | net = wiphy_net(&rdev->wiphy); | |
251 | ||
252 | list_for_each_entry_continue_reverse(wdev, &rdev->netdev_list, | |
253 | list) { | |
254 | wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; | |
255 | err = dev_change_net_namespace(wdev->netdev, net, | |
256 | "wlan%d"); | |
257 | WARN_ON(err); | |
258 | wdev->netdev->features |= NETIF_F_NETNS_LOCAL; | |
259 | } | |
260 | } | |
261 | ||
262 | wiphy_net_set(&rdev->wiphy, net); | |
263 | ||
264 | return err; | |
265 | } | |
266 | ||
1f87f7d3 JB |
267 | static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data) |
268 | { | |
79c97e97 | 269 | struct cfg80211_registered_device *rdev = data; |
1f87f7d3 | 270 | |
79c97e97 | 271 | rdev->ops->rfkill_poll(&rdev->wiphy); |
1f87f7d3 JB |
272 | } |
273 | ||
274 | static int cfg80211_rfkill_set_block(void *data, bool blocked) | |
275 | { | |
79c97e97 | 276 | struct cfg80211_registered_device *rdev = data; |
1f87f7d3 JB |
277 | struct wireless_dev *wdev; |
278 | ||
279 | if (!blocked) | |
280 | return 0; | |
281 | ||
282 | rtnl_lock(); | |
79c97e97 | 283 | mutex_lock(&rdev->devlist_mtx); |
1f87f7d3 | 284 | |
79c97e97 | 285 | list_for_each_entry(wdev, &rdev->netdev_list, list) |
1f87f7d3 JB |
286 | dev_close(wdev->netdev); |
287 | ||
79c97e97 | 288 | mutex_unlock(&rdev->devlist_mtx); |
1f87f7d3 JB |
289 | rtnl_unlock(); |
290 | ||
291 | return 0; | |
292 | } | |
293 | ||
294 | static void cfg80211_rfkill_sync_work(struct work_struct *work) | |
295 | { | |
79c97e97 | 296 | struct cfg80211_registered_device *rdev; |
1f87f7d3 | 297 | |
79c97e97 JB |
298 | rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync); |
299 | cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill)); | |
1f87f7d3 JB |
300 | } |
301 | ||
667503dd JB |
302 | static void cfg80211_event_work(struct work_struct *work) |
303 | { | |
304 | struct cfg80211_registered_device *rdev; | |
667503dd JB |
305 | |
306 | rdev = container_of(work, struct cfg80211_registered_device, | |
307 | event_work); | |
308 | ||
309 | rtnl_lock(); | |
310 | cfg80211_lock_rdev(rdev); | |
667503dd | 311 | |
3d54d255 | 312 | cfg80211_process_rdev_events(rdev); |
667503dd JB |
313 | cfg80211_unlock_rdev(rdev); |
314 | rtnl_unlock(); | |
315 | } | |
316 | ||
704232c2 JB |
317 | /* exported functions */ |
318 | ||
3dcf670b | 319 | struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv) |
704232c2 | 320 | { |
638af073 DC |
321 | static int wiphy_counter; |
322 | ||
79c97e97 | 323 | struct cfg80211_registered_device *rdev; |
704232c2 JB |
324 | int alloc_size; |
325 | ||
0b20633d JB |
326 | WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key)); |
327 | WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc)); | |
328 | WARN_ON(ops->connect && !ops->disconnect); | |
329 | WARN_ON(ops->join_ibss && !ops->leave_ibss); | |
330 | WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf); | |
331 | WARN_ON(ops->add_station && !ops->del_station); | |
332 | WARN_ON(ops->add_mpath && !ops->del_mpath); | |
41ade00f | 333 | |
79c97e97 | 334 | alloc_size = sizeof(*rdev) + sizeof_priv; |
704232c2 | 335 | |
79c97e97 JB |
336 | rdev = kzalloc(alloc_size, GFP_KERNEL); |
337 | if (!rdev) | |
704232c2 JB |
338 | return NULL; |
339 | ||
79c97e97 | 340 | rdev->ops = ops; |
704232c2 | 341 | |
a1794390 | 342 | mutex_lock(&cfg80211_mutex); |
704232c2 | 343 | |
79c97e97 | 344 | rdev->wiphy_idx = wiphy_counter++; |
a4d73ee1 | 345 | |
79c97e97 | 346 | if (unlikely(!wiphy_idx_valid(rdev->wiphy_idx))) { |
638af073 | 347 | wiphy_counter--; |
a1794390 | 348 | mutex_unlock(&cfg80211_mutex); |
704232c2 | 349 | /* ugh, wrapped! */ |
79c97e97 | 350 | kfree(rdev); |
704232c2 JB |
351 | return NULL; |
352 | } | |
704232c2 | 353 | |
a1794390 | 354 | mutex_unlock(&cfg80211_mutex); |
638af073 | 355 | |
704232c2 | 356 | /* give it a proper name */ |
79c97e97 JB |
357 | dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx); |
358 | ||
359 | mutex_init(&rdev->mtx); | |
360 | mutex_init(&rdev->devlist_mtx); | |
361 | INIT_LIST_HEAD(&rdev->netdev_list); | |
362 | spin_lock_init(&rdev->bss_lock); | |
363 | INIT_LIST_HEAD(&rdev->bss_list); | |
364 | INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done); | |
365 | ||
3d23e349 JB |
366 | #ifdef CONFIG_CFG80211_WEXT |
367 | rdev->wiphy.wext = &cfg80211_wext_handler; | |
368 | #endif | |
369 | ||
79c97e97 JB |
370 | device_initialize(&rdev->wiphy.dev); |
371 | rdev->wiphy.dev.class = &ieee80211_class; | |
372 | rdev->wiphy.dev.platform_data = rdev; | |
373 | ||
5be83de5 JB |
374 | #ifdef CONFIG_CFG80211_DEFAULT_PS |
375 | rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; | |
376 | #endif | |
16cb9d42 | 377 | |
463d0183 JB |
378 | wiphy_net_set(&rdev->wiphy, &init_net); |
379 | ||
79c97e97 JB |
380 | rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block; |
381 | rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev), | |
382 | &rdev->wiphy.dev, RFKILL_TYPE_WLAN, | |
383 | &rdev->rfkill_ops, rdev); | |
384 | ||
385 | if (!rdev->rfkill) { | |
386 | kfree(rdev); | |
1f87f7d3 JB |
387 | return NULL; |
388 | } | |
389 | ||
79c97e97 JB |
390 | INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work); |
391 | INIT_WORK(&rdev->conn_work, cfg80211_conn_work); | |
392 | INIT_WORK(&rdev->event_work, cfg80211_event_work); | |
1f87f7d3 | 393 | |
ad002395 JB |
394 | init_waitqueue_head(&rdev->dev_wait); |
395 | ||
b9a5f8ca JM |
396 | /* |
397 | * Initialize wiphy parameters to IEEE 802.11 MIB default values. | |
398 | * Fragmentation and RTS threshold are disabled by default with the | |
399 | * special -1 value. | |
400 | */ | |
79c97e97 JB |
401 | rdev->wiphy.retry_short = 7; |
402 | rdev->wiphy.retry_long = 4; | |
403 | rdev->wiphy.frag_threshold = (u32) -1; | |
404 | rdev->wiphy.rts_threshold = (u32) -1; | |
b9a5f8ca | 405 | |
79c97e97 | 406 | return &rdev->wiphy; |
704232c2 JB |
407 | } |
408 | EXPORT_SYMBOL(wiphy_new); | |
409 | ||
410 | int wiphy_register(struct wiphy *wiphy) | |
411 | { | |
79c97e97 | 412 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
704232c2 | 413 | int res; |
8318d78a JB |
414 | enum ieee80211_band band; |
415 | struct ieee80211_supported_band *sband; | |
416 | bool have_band = false; | |
417 | int i; | |
f59ac048 LR |
418 | u16 ifmodes = wiphy->interface_modes; |
419 | ||
420 | /* sanity check ifmodes */ | |
421 | WARN_ON(!ifmodes); | |
422 | ifmodes &= ((1 << __NL80211_IFTYPE_AFTER_LAST) - 1) & ~1; | |
423 | if (WARN_ON(ifmodes != wiphy->interface_modes)) | |
424 | wiphy->interface_modes = ifmodes; | |
8318d78a JB |
425 | |
426 | /* sanity check supported bands/channels */ | |
427 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
428 | sband = wiphy->bands[band]; | |
429 | if (!sband) | |
430 | continue; | |
431 | ||
432 | sband->band = band; | |
433 | ||
881d948c JB |
434 | if (WARN_ON(!sband->n_channels || !sband->n_bitrates)) |
435 | return -EINVAL; | |
436 | ||
437 | /* | |
438 | * Since we use a u32 for rate bitmaps in | |
439 | * ieee80211_get_response_rate, we cannot | |
440 | * have more than 32 legacy rates. | |
441 | */ | |
442 | if (WARN_ON(sband->n_bitrates > 32)) | |
8318d78a | 443 | return -EINVAL; |
8318d78a JB |
444 | |
445 | for (i = 0; i < sband->n_channels; i++) { | |
446 | sband->channels[i].orig_flags = | |
447 | sband->channels[i].flags; | |
448 | sband->channels[i].orig_mag = | |
449 | sband->channels[i].max_antenna_gain; | |
450 | sband->channels[i].orig_mpwr = | |
451 | sband->channels[i].max_power; | |
452 | sband->channels[i].band = band; | |
453 | } | |
454 | ||
455 | have_band = true; | |
456 | } | |
457 | ||
458 | if (!have_band) { | |
459 | WARN_ON(1); | |
460 | return -EINVAL; | |
461 | } | |
462 | ||
463 | /* check and set up bitrates */ | |
464 | ieee80211_set_bitrate_flags(wiphy); | |
465 | ||
79c97e97 | 466 | res = device_add(&rdev->wiphy.dev); |
704232c2 | 467 | if (res) |
2f0accc1 | 468 | return res; |
704232c2 | 469 | |
79c97e97 | 470 | res = rfkill_register(rdev->rfkill); |
1f87f7d3 JB |
471 | if (res) |
472 | goto out_rm_dev; | |
473 | ||
2f0accc1 JB |
474 | mutex_lock(&cfg80211_mutex); |
475 | ||
476 | /* set up regulatory info */ | |
477 | wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE); | |
478 | ||
79c97e97 | 479 | list_add(&rdev->list, &cfg80211_rdev_list); |
f5ea9120 | 480 | cfg80211_rdev_list_generation++; |
704232c2 | 481 | |
2f0accc1 JB |
482 | mutex_unlock(&cfg80211_mutex); |
483 | ||
704232c2 | 484 | /* add to debugfs */ |
79c97e97 JB |
485 | rdev->wiphy.debugfsdir = |
486 | debugfs_create_dir(wiphy_name(&rdev->wiphy), | |
704232c2 | 487 | ieee80211_debugfs_dir); |
79c97e97 JB |
488 | if (IS_ERR(rdev->wiphy.debugfsdir)) |
489 | rdev->wiphy.debugfsdir = NULL; | |
704232c2 | 490 | |
5be83de5 | 491 | if (wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { |
73d54c9e LR |
492 | struct regulatory_request request; |
493 | ||
494 | request.wiphy_idx = get_wiphy_idx(wiphy); | |
495 | request.initiator = NL80211_REGDOM_SET_BY_DRIVER; | |
496 | request.alpha2[0] = '9'; | |
497 | request.alpha2[1] = '9'; | |
498 | ||
499 | nl80211_send_reg_change_event(&request); | |
500 | } | |
501 | ||
79c97e97 | 502 | cfg80211_debugfs_rdev_add(rdev); |
1ac61302 | 503 | |
2f0accc1 | 504 | return 0; |
1f87f7d3 JB |
505 | |
506 | out_rm_dev: | |
79c97e97 | 507 | device_del(&rdev->wiphy.dev); |
704232c2 JB |
508 | return res; |
509 | } | |
510 | EXPORT_SYMBOL(wiphy_register); | |
511 | ||
1f87f7d3 JB |
512 | void wiphy_rfkill_start_polling(struct wiphy *wiphy) |
513 | { | |
79c97e97 | 514 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 515 | |
79c97e97 | 516 | if (!rdev->ops->rfkill_poll) |
1f87f7d3 | 517 | return; |
79c97e97 JB |
518 | rdev->rfkill_ops.poll = cfg80211_rfkill_poll; |
519 | rfkill_resume_polling(rdev->rfkill); | |
1f87f7d3 JB |
520 | } |
521 | EXPORT_SYMBOL(wiphy_rfkill_start_polling); | |
522 | ||
523 | void wiphy_rfkill_stop_polling(struct wiphy *wiphy) | |
524 | { | |
79c97e97 | 525 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 526 | |
79c97e97 | 527 | rfkill_pause_polling(rdev->rfkill); |
1f87f7d3 JB |
528 | } |
529 | EXPORT_SYMBOL(wiphy_rfkill_stop_polling); | |
530 | ||
704232c2 JB |
531 | void wiphy_unregister(struct wiphy *wiphy) |
532 | { | |
79c97e97 | 533 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
704232c2 | 534 | |
79c97e97 | 535 | rfkill_unregister(rdev->rfkill); |
1f87f7d3 | 536 | |
f16bfc1c | 537 | /* protect the device list */ |
a1794390 | 538 | mutex_lock(&cfg80211_mutex); |
704232c2 | 539 | |
ad002395 JB |
540 | wait_event(rdev->dev_wait, ({ |
541 | int __count; | |
542 | mutex_lock(&rdev->devlist_mtx); | |
543 | __count = rdev->opencount; | |
544 | mutex_unlock(&rdev->devlist_mtx); | |
545 | __count == 0;})); | |
546 | ||
547 | mutex_lock(&rdev->devlist_mtx); | |
79c97e97 | 548 | BUG_ON(!list_empty(&rdev->netdev_list)); |
ad002395 JB |
549 | mutex_unlock(&rdev->devlist_mtx); |
550 | ||
551 | /* | |
552 | * First remove the hardware from everywhere, this makes | |
553 | * it impossible to find from userspace. | |
554 | */ | |
7bcfaf2f | 555 | debugfs_remove_recursive(rdev->wiphy.debugfsdir); |
ad002395 | 556 | list_del(&rdev->list); |
f16bfc1c JB |
557 | |
558 | /* | |
79c97e97 | 559 | * Try to grab rdev->mtx. If a command is still in progress, |
f16bfc1c JB |
560 | * hopefully the driver will refuse it since it's tearing |
561 | * down the device already. We wait for this command to complete | |
562 | * before unlinking the item from the list. | |
563 | * Note: as codified by the BUG_ON above we cannot get here if | |
ad002395 JB |
564 | * a virtual interface is still present. Hence, we can only get |
565 | * to lock contention here if userspace issues a command that | |
566 | * identified the hardware by wiphy index. | |
f16bfc1c | 567 | */ |
0ff6ce7b | 568 | cfg80211_lock_rdev(rdev); |
ad002395 | 569 | /* nothing */ |
0ff6ce7b | 570 | cfg80211_unlock_rdev(rdev); |
704232c2 | 571 | |
3f2355cb LR |
572 | /* If this device got a regulatory hint tell core its |
573 | * free to listen now to a new shiny device regulatory hint */ | |
574 | reg_device_remove(wiphy); | |
575 | ||
f5ea9120 | 576 | cfg80211_rdev_list_generation++; |
79c97e97 | 577 | device_del(&rdev->wiphy.dev); |
704232c2 | 578 | |
a1794390 | 579 | mutex_unlock(&cfg80211_mutex); |
6682588a | 580 | |
36e6fea8 | 581 | flush_work(&rdev->scan_done_wk); |
6682588a | 582 | cancel_work_sync(&rdev->conn_work); |
6682588a | 583 | flush_work(&rdev->event_work); |
704232c2 JB |
584 | } |
585 | EXPORT_SYMBOL(wiphy_unregister); | |
586 | ||
79c97e97 | 587 | void cfg80211_dev_free(struct cfg80211_registered_device *rdev) |
704232c2 | 588 | { |
2a519311 | 589 | struct cfg80211_internal_bss *scan, *tmp; |
79c97e97 JB |
590 | rfkill_destroy(rdev->rfkill); |
591 | mutex_destroy(&rdev->mtx); | |
592 | mutex_destroy(&rdev->devlist_mtx); | |
593 | list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list) | |
78c1c7e1 | 594 | cfg80211_put_bss(&scan->pub); |
79c97e97 | 595 | kfree(rdev); |
704232c2 JB |
596 | } |
597 | ||
598 | void wiphy_free(struct wiphy *wiphy) | |
599 | { | |
600 | put_device(&wiphy->dev); | |
601 | } | |
602 | EXPORT_SYMBOL(wiphy_free); | |
603 | ||
1f87f7d3 JB |
604 | void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked) |
605 | { | |
79c97e97 | 606 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 607 | |
79c97e97 JB |
608 | if (rfkill_set_hw_state(rdev->rfkill, blocked)) |
609 | schedule_work(&rdev->rfkill_sync); | |
1f87f7d3 JB |
610 | } |
611 | EXPORT_SYMBOL(wiphy_rfkill_set_hw_state); | |
612 | ||
ad002395 JB |
613 | static void wdev_cleanup_work(struct work_struct *work) |
614 | { | |
615 | struct wireless_dev *wdev; | |
616 | struct cfg80211_registered_device *rdev; | |
617 | ||
618 | wdev = container_of(work, struct wireless_dev, cleanup_work); | |
619 | rdev = wiphy_to_dev(wdev->wiphy); | |
620 | ||
621 | cfg80211_lock_rdev(rdev); | |
622 | ||
623 | if (WARN_ON(rdev->scan_req && rdev->scan_req->dev == wdev->netdev)) { | |
624 | rdev->scan_req->aborted = true; | |
01a0ac41 | 625 | ___cfg80211_scan_done(rdev, true); |
ad002395 JB |
626 | } |
627 | ||
628 | cfg80211_unlock_rdev(rdev); | |
629 | ||
630 | mutex_lock(&rdev->devlist_mtx); | |
631 | rdev->opencount--; | |
632 | mutex_unlock(&rdev->devlist_mtx); | |
633 | wake_up(&rdev->dev_wait); | |
634 | ||
635 | dev_put(wdev->netdev); | |
636 | } | |
637 | ||
053a93dd MH |
638 | static struct device_type wiphy_type = { |
639 | .name = "wlan", | |
640 | }; | |
641 | ||
704232c2 JB |
642 | static int cfg80211_netdev_notifier_call(struct notifier_block * nb, |
643 | unsigned long state, | |
644 | void *ndev) | |
645 | { | |
646 | struct net_device *dev = ndev; | |
2a783c13 | 647 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
704232c2 JB |
648 | struct cfg80211_registered_device *rdev; |
649 | ||
2a783c13 | 650 | if (!wdev) |
1f87f7d3 | 651 | return NOTIFY_DONE; |
704232c2 | 652 | |
2a783c13 | 653 | rdev = wiphy_to_dev(wdev->wiphy); |
704232c2 | 654 | |
2a783c13 | 655 | WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); |
60719ffd | 656 | |
704232c2 | 657 | switch (state) { |
053a93dd MH |
658 | case NETDEV_POST_INIT: |
659 | SET_NETDEV_DEVTYPE(dev, &wiphy_type); | |
660 | break; | |
704232c2 | 661 | case NETDEV_REGISTER: |
0ff6ce7b JB |
662 | /* |
663 | * NB: cannot take rdev->mtx here because this may be | |
664 | * called within code protected by it when interfaces | |
665 | * are added with nl80211. | |
666 | */ | |
667503dd | 667 | mutex_init(&wdev->mtx); |
ad002395 | 668 | INIT_WORK(&wdev->cleanup_work, wdev_cleanup_work); |
667503dd JB |
669 | INIT_LIST_HEAD(&wdev->event_list); |
670 | spin_lock_init(&wdev->event_lock); | |
704232c2 | 671 | mutex_lock(&rdev->devlist_mtx); |
2a783c13 | 672 | list_add(&wdev->list, &rdev->netdev_list); |
f5ea9120 | 673 | rdev->devlist_generation++; |
463d0183 JB |
674 | /* can only change netns with wiphy */ |
675 | dev->features |= NETIF_F_NETNS_LOCAL; | |
676 | ||
704232c2 JB |
677 | if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj, |
678 | "phy80211")) { | |
679 | printk(KERN_ERR "wireless: failed to add phy80211 " | |
680 | "symlink to netdev!\n"); | |
681 | } | |
2a783c13 | 682 | wdev->netdev = dev; |
b23aa676 | 683 | wdev->sme_state = CFG80211_SME_IDLE; |
bc92afd9 | 684 | mutex_unlock(&rdev->devlist_mtx); |
3d23e349 | 685 | #ifdef CONFIG_CFG80211_WEXT |
2a783c13 JB |
686 | wdev->wext.default_key = -1; |
687 | wdev->wext.default_mgmt_key = -1; | |
f2129354 | 688 | wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; |
5be83de5 JB |
689 | if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT) |
690 | wdev->wext.ps = true; | |
691 | else | |
692 | wdev->wext.ps = false; | |
75e6c3b7 | 693 | wdev->wext.ps_timeout = 100; |
bc92afd9 JB |
694 | if (rdev->ops->set_power_mgmt) |
695 | if (rdev->ops->set_power_mgmt(wdev->wiphy, dev, | |
696 | wdev->wext.ps, | |
697 | wdev->wext.ps_timeout)) { | |
698 | /* assume this means it's off */ | |
699 | wdev->wext.ps = false; | |
700 | } | |
08645126 | 701 | #endif |
4890e3be JL |
702 | if (!dev->ethtool_ops) |
703 | dev->ethtool_ops = &cfg80211_ethtool_ops; | |
ad4bb6f8 JB |
704 | |
705 | if ((wdev->iftype == NL80211_IFTYPE_STATION || | |
706 | wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr) | |
707 | dev->priv_flags |= IFF_DONT_BRIDGE; | |
704232c2 | 708 | break; |
04a773ad | 709 | case NETDEV_GOING_DOWN: |
b23aa676 SO |
710 | switch (wdev->iftype) { |
711 | case NL80211_IFTYPE_ADHOC: | |
712 | cfg80211_leave_ibss(rdev, dev, true); | |
713 | break; | |
714 | case NL80211_IFTYPE_STATION: | |
667503dd | 715 | wdev_lock(wdev); |
3d23e349 | 716 | #ifdef CONFIG_CFG80211_WEXT |
f2129354 JB |
717 | kfree(wdev->wext.ie); |
718 | wdev->wext.ie = NULL; | |
719 | wdev->wext.ie_len = 0; | |
0eb14647 | 720 | wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; |
f2129354 | 721 | #endif |
667503dd JB |
722 | __cfg80211_disconnect(rdev, dev, |
723 | WLAN_REASON_DEAUTH_LEAVING, true); | |
19957bb3 | 724 | cfg80211_mlme_down(rdev, dev); |
667503dd | 725 | wdev_unlock(wdev); |
b23aa676 SO |
726 | break; |
727 | default: | |
728 | break; | |
729 | } | |
01a0ac41 JB |
730 | break; |
731 | case NETDEV_DOWN: | |
ad002395 | 732 | dev_hold(dev); |
e60d7443 | 733 | queue_work(cfg80211_wq, &wdev->cleanup_work); |
04a773ad JB |
734 | break; |
735 | case NETDEV_UP: | |
ad002395 JB |
736 | /* |
737 | * If we have a really quick DOWN/UP succession we may | |
738 | * have this work still pending ... cancel it and see | |
739 | * if it was pending, in which case we need to account | |
740 | * for some of the work it would have done. | |
741 | */ | |
742 | if (cancel_work_sync(&wdev->cleanup_work)) { | |
743 | mutex_lock(&rdev->devlist_mtx); | |
744 | rdev->opencount--; | |
745 | mutex_unlock(&rdev->devlist_mtx); | |
746 | dev_put(dev); | |
747 | } | |
667503dd | 748 | cfg80211_lock_rdev(rdev); |
aee83eaf | 749 | mutex_lock(&rdev->devlist_mtx); |
8c5d9808 | 750 | #ifdef CONFIG_CFG80211_WEXT |
667503dd | 751 | wdev_lock(wdev); |
f2129354 JB |
752 | switch (wdev->iftype) { |
753 | case NL80211_IFTYPE_ADHOC: | |
fffd0934 | 754 | cfg80211_ibss_wext_join(rdev, wdev); |
04a773ad | 755 | break; |
f2129354 | 756 | case NL80211_IFTYPE_STATION: |
fffd0934 | 757 | cfg80211_mgd_wext_connect(rdev, wdev); |
f2129354 JB |
758 | break; |
759 | default: | |
04a773ad | 760 | break; |
f2129354 | 761 | } |
667503dd | 762 | wdev_unlock(wdev); |
8c5d9808 | 763 | #endif |
ad002395 | 764 | rdev->opencount++; |
aee83eaf | 765 | mutex_unlock(&rdev->devlist_mtx); |
667503dd | 766 | cfg80211_unlock_rdev(rdev); |
2a783c13 | 767 | break; |
704232c2 | 768 | case NETDEV_UNREGISTER: |
0ff6ce7b JB |
769 | /* |
770 | * NB: cannot take rdev->mtx here because this may be | |
771 | * called within code protected by it when interfaces | |
772 | * are removed with nl80211. | |
773 | */ | |
704232c2 | 774 | mutex_lock(&rdev->devlist_mtx); |
e40cbdac JB |
775 | /* |
776 | * It is possible to get NETDEV_UNREGISTER | |
777 | * multiple times. To detect that, check | |
778 | * that the interface is still on the list | |
779 | * of registered interfaces, and only then | |
780 | * remove and clean it up. | |
781 | */ | |
2a783c13 | 782 | if (!list_empty(&wdev->list)) { |
704232c2 | 783 | sysfs_remove_link(&dev->dev.kobj, "phy80211"); |
2a783c13 | 784 | list_del_init(&wdev->list); |
f5ea9120 | 785 | rdev->devlist_generation++; |
3d23e349 | 786 | #ifdef CONFIG_CFG80211_WEXT |
e40cbdac | 787 | kfree(wdev->wext.keys); |
fffd0934 | 788 | #endif |
e40cbdac JB |
789 | } |
790 | mutex_unlock(&rdev->devlist_mtx); | |
704232c2 | 791 | break; |
1f87f7d3 | 792 | case NETDEV_PRE_UP: |
0b20633d JB |
793 | if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype))) |
794 | return notifier_from_errno(-EOPNOTSUPP); | |
1f87f7d3 JB |
795 | if (rfkill_blocked(rdev->rfkill)) |
796 | return notifier_from_errno(-ERFKILL); | |
797 | break; | |
704232c2 JB |
798 | } |
799 | ||
1f87f7d3 | 800 | return NOTIFY_DONE; |
704232c2 JB |
801 | } |
802 | ||
803 | static struct notifier_block cfg80211_netdev_notifier = { | |
804 | .notifier_call = cfg80211_netdev_notifier_call, | |
805 | }; | |
806 | ||
463d0183 JB |
807 | static void __net_exit cfg80211_pernet_exit(struct net *net) |
808 | { | |
809 | struct cfg80211_registered_device *rdev; | |
810 | ||
811 | rtnl_lock(); | |
812 | mutex_lock(&cfg80211_mutex); | |
813 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
814 | if (net_eq(wiphy_net(&rdev->wiphy), net)) | |
815 | WARN_ON(cfg80211_switch_netns(rdev, &init_net)); | |
816 | } | |
817 | mutex_unlock(&cfg80211_mutex); | |
818 | rtnl_unlock(); | |
819 | } | |
820 | ||
821 | static struct pernet_operations cfg80211_pernet_ops = { | |
822 | .exit = cfg80211_pernet_exit, | |
823 | }; | |
824 | ||
825 | static int __init cfg80211_init(void) | |
704232c2 | 826 | { |
b2e1b302 LR |
827 | int err; |
828 | ||
463d0183 JB |
829 | err = register_pernet_device(&cfg80211_pernet_ops); |
830 | if (err) | |
831 | goto out_fail_pernet; | |
832 | ||
b2e1b302 | 833 | err = wiphy_sysfs_init(); |
704232c2 JB |
834 | if (err) |
835 | goto out_fail_sysfs; | |
836 | ||
837 | err = register_netdevice_notifier(&cfg80211_netdev_notifier); | |
838 | if (err) | |
839 | goto out_fail_notifier; | |
840 | ||
55682965 JB |
841 | err = nl80211_init(); |
842 | if (err) | |
843 | goto out_fail_nl80211; | |
844 | ||
704232c2 JB |
845 | ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); |
846 | ||
b2e1b302 LR |
847 | err = regulatory_init(); |
848 | if (err) | |
849 | goto out_fail_reg; | |
850 | ||
e60d7443 AB |
851 | cfg80211_wq = create_singlethread_workqueue("cfg80211"); |
852 | if (!cfg80211_wq) | |
853 | goto out_fail_wq; | |
854 | ||
704232c2 JB |
855 | return 0; |
856 | ||
e60d7443 AB |
857 | out_fail_wq: |
858 | regulatory_exit(); | |
b2e1b302 LR |
859 | out_fail_reg: |
860 | debugfs_remove(ieee80211_debugfs_dir); | |
55682965 JB |
861 | out_fail_nl80211: |
862 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); | |
704232c2 JB |
863 | out_fail_notifier: |
864 | wiphy_sysfs_exit(); | |
865 | out_fail_sysfs: | |
463d0183 JB |
866 | unregister_pernet_device(&cfg80211_pernet_ops); |
867 | out_fail_pernet: | |
704232c2 JB |
868 | return err; |
869 | } | |
3a462465 | 870 | subsys_initcall(cfg80211_init); |
704232c2 JB |
871 | |
872 | static void cfg80211_exit(void) | |
873 | { | |
874 | debugfs_remove(ieee80211_debugfs_dir); | |
55682965 | 875 | nl80211_exit(); |
704232c2 JB |
876 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); |
877 | wiphy_sysfs_exit(); | |
b2e1b302 | 878 | regulatory_exit(); |
463d0183 | 879 | unregister_pernet_device(&cfg80211_pernet_ops); |
e60d7443 | 880 | destroy_workqueue(cfg80211_wq); |
704232c2 JB |
881 | } |
882 | module_exit(cfg80211_exit); |