]>
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> | |
1f87f7d3 | 15 | #include <linux/rtnetlink.h> |
704232c2 JB |
16 | #include <net/genetlink.h> |
17 | #include <net/cfg80211.h> | |
55682965 | 18 | #include "nl80211.h" |
704232c2 JB |
19 | #include "core.h" |
20 | #include "sysfs.h" | |
1ac61302 | 21 | #include "debugfs.h" |
704232c2 JB |
22 | |
23 | /* name for sysfs, %d is appended */ | |
24 | #define PHY_NAME "phy" | |
25 | ||
26 | MODULE_AUTHOR("Johannes Berg"); | |
27 | MODULE_LICENSE("GPL"); | |
28 | MODULE_DESCRIPTION("wireless configuration support"); | |
29 | ||
30 | /* RCU might be appropriate here since we usually | |
31 | * only read the list, and that can happen quite | |
32 | * often because we need to do it for each command */ | |
33 | LIST_HEAD(cfg80211_drv_list); | |
a1794390 LR |
34 | |
35 | /* | |
e38f8a7a LR |
36 | * This is used to protect the cfg80211_drv_list, cfg80211_regdomain, |
37 | * country_ie_regdomain, the reg_beacon_list and the the last regulatory | |
38 | * request receipt (last_request). | |
a1794390 LR |
39 | */ |
40 | DEFINE_MUTEX(cfg80211_mutex); | |
704232c2 JB |
41 | |
42 | /* for debugfs */ | |
43 | static struct dentry *ieee80211_debugfs_dir; | |
44 | ||
806a9e39 LR |
45 | /* requires cfg80211_mutex to be held! */ |
46 | struct cfg80211_registered_device *cfg80211_drv_by_wiphy_idx(int wiphy_idx) | |
55682965 JB |
47 | { |
48 | struct cfg80211_registered_device *result = NULL, *drv; | |
49 | ||
85fd129a LR |
50 | if (!wiphy_idx_valid(wiphy_idx)) |
51 | return NULL; | |
52 | ||
761cf7ec LR |
53 | assert_cfg80211_lock(); |
54 | ||
55682965 | 55 | list_for_each_entry(drv, &cfg80211_drv_list, list) { |
b5850a7a | 56 | if (drv->wiphy_idx == wiphy_idx) { |
55682965 JB |
57 | result = drv; |
58 | break; | |
59 | } | |
60 | } | |
61 | ||
62 | return result; | |
63 | } | |
64 | ||
806a9e39 LR |
65 | int get_wiphy_idx(struct wiphy *wiphy) |
66 | { | |
67 | struct cfg80211_registered_device *drv; | |
68 | if (!wiphy) | |
69 | return WIPHY_IDX_STALE; | |
70 | drv = wiphy_to_dev(wiphy); | |
71 | return drv->wiphy_idx; | |
72 | } | |
73 | ||
74 | /* requires cfg80211_drv_mutex to be held! */ | |
75 | struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx) | |
76 | { | |
77 | struct cfg80211_registered_device *drv; | |
78 | ||
79 | if (!wiphy_idx_valid(wiphy_idx)) | |
80 | return NULL; | |
81 | ||
82 | assert_cfg80211_lock(); | |
83 | ||
84 | drv = cfg80211_drv_by_wiphy_idx(wiphy_idx); | |
85 | if (!drv) | |
86 | return NULL; | |
87 | return &drv->wiphy; | |
88 | } | |
89 | ||
a1794390 | 90 | /* requires cfg80211_mutex to be held! */ |
4bbf4d56 | 91 | struct cfg80211_registered_device * |
55682965 JB |
92 | __cfg80211_drv_from_info(struct genl_info *info) |
93 | { | |
94 | int ifindex; | |
b5850a7a | 95 | struct cfg80211_registered_device *bywiphyidx = NULL, *byifidx = NULL; |
55682965 JB |
96 | struct net_device *dev; |
97 | int err = -EINVAL; | |
98 | ||
761cf7ec LR |
99 | assert_cfg80211_lock(); |
100 | ||
55682965 | 101 | if (info->attrs[NL80211_ATTR_WIPHY]) { |
b5850a7a | 102 | bywiphyidx = cfg80211_drv_by_wiphy_idx( |
55682965 JB |
103 | nla_get_u32(info->attrs[NL80211_ATTR_WIPHY])); |
104 | err = -ENODEV; | |
105 | } | |
106 | ||
107 | if (info->attrs[NL80211_ATTR_IFINDEX]) { | |
108 | ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]); | |
109 | dev = dev_get_by_index(&init_net, ifindex); | |
110 | if (dev) { | |
111 | if (dev->ieee80211_ptr) | |
112 | byifidx = | |
113 | wiphy_to_dev(dev->ieee80211_ptr->wiphy); | |
114 | dev_put(dev); | |
115 | } | |
116 | err = -ENODEV; | |
117 | } | |
118 | ||
b5850a7a LR |
119 | if (bywiphyidx && byifidx) { |
120 | if (bywiphyidx != byifidx) | |
55682965 JB |
121 | return ERR_PTR(-EINVAL); |
122 | else | |
b5850a7a | 123 | return bywiphyidx; /* == byifidx */ |
55682965 | 124 | } |
b5850a7a LR |
125 | if (bywiphyidx) |
126 | return bywiphyidx; | |
55682965 JB |
127 | |
128 | if (byifidx) | |
129 | return byifidx; | |
130 | ||
131 | return ERR_PTR(err); | |
132 | } | |
133 | ||
134 | struct cfg80211_registered_device * | |
135 | cfg80211_get_dev_from_info(struct genl_info *info) | |
136 | { | |
137 | struct cfg80211_registered_device *drv; | |
138 | ||
a1794390 | 139 | mutex_lock(&cfg80211_mutex); |
55682965 JB |
140 | drv = __cfg80211_drv_from_info(info); |
141 | ||
142 | /* if it is not an error we grab the lock on | |
143 | * it to assure it won't be going away while | |
144 | * we operate on it */ | |
145 | if (!IS_ERR(drv)) | |
146 | mutex_lock(&drv->mtx); | |
147 | ||
a1794390 | 148 | mutex_unlock(&cfg80211_mutex); |
55682965 JB |
149 | |
150 | return drv; | |
151 | } | |
152 | ||
153 | struct cfg80211_registered_device * | |
154 | cfg80211_get_dev_from_ifindex(int ifindex) | |
155 | { | |
156 | struct cfg80211_registered_device *drv = ERR_PTR(-ENODEV); | |
157 | struct net_device *dev; | |
158 | ||
a1794390 | 159 | mutex_lock(&cfg80211_mutex); |
55682965 JB |
160 | dev = dev_get_by_index(&init_net, ifindex); |
161 | if (!dev) | |
162 | goto out; | |
163 | if (dev->ieee80211_ptr) { | |
164 | drv = wiphy_to_dev(dev->ieee80211_ptr->wiphy); | |
165 | mutex_lock(&drv->mtx); | |
166 | } else | |
167 | drv = ERR_PTR(-ENODEV); | |
168 | dev_put(dev); | |
169 | out: | |
a1794390 | 170 | mutex_unlock(&cfg80211_mutex); |
55682965 JB |
171 | return drv; |
172 | } | |
173 | ||
174 | void cfg80211_put_dev(struct cfg80211_registered_device *drv) | |
175 | { | |
176 | BUG_ON(IS_ERR(drv)); | |
177 | mutex_unlock(&drv->mtx); | |
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 | { | |
2940bb69 | 184 | struct cfg80211_registered_device *drv; |
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. */ | |
4bbf4d56 | 210 | list_for_each_entry(drv, &cfg80211_drv_list, list) |
2940bb69 | 211 | if (strcmp(newname, dev_name(&drv->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 | ||
1f87f7d3 JB |
231 | static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data) |
232 | { | |
233 | struct cfg80211_registered_device *drv = data; | |
234 | ||
235 | drv->ops->rfkill_poll(&drv->wiphy); | |
236 | } | |
237 | ||
238 | static int cfg80211_rfkill_set_block(void *data, bool blocked) | |
239 | { | |
240 | struct cfg80211_registered_device *drv = data; | |
241 | struct wireless_dev *wdev; | |
242 | ||
243 | if (!blocked) | |
244 | return 0; | |
245 | ||
246 | rtnl_lock(); | |
247 | mutex_lock(&drv->devlist_mtx); | |
248 | ||
249 | list_for_each_entry(wdev, &drv->netdev_list, list) | |
250 | dev_close(wdev->netdev); | |
251 | ||
252 | mutex_unlock(&drv->devlist_mtx); | |
253 | rtnl_unlock(); | |
254 | ||
255 | return 0; | |
256 | } | |
257 | ||
258 | static void cfg80211_rfkill_sync_work(struct work_struct *work) | |
259 | { | |
260 | struct cfg80211_registered_device *drv; | |
261 | ||
262 | drv = container_of(work, struct cfg80211_registered_device, rfkill_sync); | |
263 | cfg80211_rfkill_set_block(drv, rfkill_blocked(drv->rfkill)); | |
264 | } | |
265 | ||
704232c2 JB |
266 | /* exported functions */ |
267 | ||
3dcf670b | 268 | struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv) |
704232c2 | 269 | { |
638af073 DC |
270 | static int wiphy_counter; |
271 | ||
704232c2 JB |
272 | struct cfg80211_registered_device *drv; |
273 | int alloc_size; | |
274 | ||
41ade00f JB |
275 | WARN_ON(!ops->add_key && ops->del_key); |
276 | WARN_ON(ops->add_key && !ops->del_key); | |
277 | ||
704232c2 JB |
278 | alloc_size = sizeof(*drv) + sizeof_priv; |
279 | ||
280 | drv = kzalloc(alloc_size, GFP_KERNEL); | |
281 | if (!drv) | |
282 | return NULL; | |
283 | ||
284 | drv->ops = ops; | |
285 | ||
a1794390 | 286 | mutex_lock(&cfg80211_mutex); |
704232c2 | 287 | |
b5850a7a | 288 | drv->wiphy_idx = wiphy_counter++; |
a4d73ee1 | 289 | |
85fd129a | 290 | if (unlikely(!wiphy_idx_valid(drv->wiphy_idx))) { |
638af073 | 291 | wiphy_counter--; |
a1794390 | 292 | mutex_unlock(&cfg80211_mutex); |
704232c2 JB |
293 | /* ugh, wrapped! */ |
294 | kfree(drv); | |
295 | return NULL; | |
296 | } | |
704232c2 | 297 | |
a1794390 | 298 | mutex_unlock(&cfg80211_mutex); |
638af073 | 299 | |
704232c2 | 300 | /* give it a proper name */ |
b5850a7a | 301 | dev_set_name(&drv->wiphy.dev, PHY_NAME "%d", drv->wiphy_idx); |
704232c2 | 302 | |
704232c2 JB |
303 | mutex_init(&drv->mtx); |
304 | mutex_init(&drv->devlist_mtx); | |
305 | INIT_LIST_HEAD(&drv->netdev_list); | |
2a519311 JB |
306 | spin_lock_init(&drv->bss_lock); |
307 | INIT_LIST_HEAD(&drv->bss_list); | |
704232c2 JB |
308 | |
309 | device_initialize(&drv->wiphy.dev); | |
310 | drv->wiphy.dev.class = &ieee80211_class; | |
311 | drv->wiphy.dev.platform_data = drv; | |
312 | ||
1f87f7d3 JB |
313 | drv->rfkill_ops.set_block = cfg80211_rfkill_set_block; |
314 | drv->rfkill = rfkill_alloc(dev_name(&drv->wiphy.dev), | |
315 | &drv->wiphy.dev, RFKILL_TYPE_WLAN, | |
316 | &drv->rfkill_ops, drv); | |
317 | ||
318 | if (!drv->rfkill) { | |
319 | kfree(drv); | |
320 | return NULL; | |
321 | } | |
322 | ||
323 | INIT_WORK(&drv->rfkill_sync, cfg80211_rfkill_sync_work); | |
324 | ||
b9a5f8ca JM |
325 | /* |
326 | * Initialize wiphy parameters to IEEE 802.11 MIB default values. | |
327 | * Fragmentation and RTS threshold are disabled by default with the | |
328 | * special -1 value. | |
329 | */ | |
330 | drv->wiphy.retry_short = 7; | |
331 | drv->wiphy.retry_long = 4; | |
332 | drv->wiphy.frag_threshold = (u32) -1; | |
333 | drv->wiphy.rts_threshold = (u32) -1; | |
334 | ||
704232c2 JB |
335 | return &drv->wiphy; |
336 | } | |
337 | EXPORT_SYMBOL(wiphy_new); | |
338 | ||
339 | int wiphy_register(struct wiphy *wiphy) | |
340 | { | |
341 | struct cfg80211_registered_device *drv = wiphy_to_dev(wiphy); | |
342 | int res; | |
8318d78a JB |
343 | enum ieee80211_band band; |
344 | struct ieee80211_supported_band *sband; | |
345 | bool have_band = false; | |
346 | int i; | |
f59ac048 LR |
347 | u16 ifmodes = wiphy->interface_modes; |
348 | ||
349 | /* sanity check ifmodes */ | |
350 | WARN_ON(!ifmodes); | |
351 | ifmodes &= ((1 << __NL80211_IFTYPE_AFTER_LAST) - 1) & ~1; | |
352 | if (WARN_ON(ifmodes != wiphy->interface_modes)) | |
353 | wiphy->interface_modes = ifmodes; | |
8318d78a JB |
354 | |
355 | /* sanity check supported bands/channels */ | |
356 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
357 | sband = wiphy->bands[band]; | |
358 | if (!sband) | |
359 | continue; | |
360 | ||
361 | sband->band = band; | |
362 | ||
881d948c JB |
363 | if (WARN_ON(!sband->n_channels || !sband->n_bitrates)) |
364 | return -EINVAL; | |
365 | ||
366 | /* | |
367 | * Since we use a u32 for rate bitmaps in | |
368 | * ieee80211_get_response_rate, we cannot | |
369 | * have more than 32 legacy rates. | |
370 | */ | |
371 | if (WARN_ON(sband->n_bitrates > 32)) | |
8318d78a | 372 | return -EINVAL; |
8318d78a JB |
373 | |
374 | for (i = 0; i < sband->n_channels; i++) { | |
375 | sband->channels[i].orig_flags = | |
376 | sband->channels[i].flags; | |
377 | sband->channels[i].orig_mag = | |
378 | sband->channels[i].max_antenna_gain; | |
379 | sband->channels[i].orig_mpwr = | |
380 | sband->channels[i].max_power; | |
381 | sband->channels[i].band = band; | |
382 | } | |
383 | ||
384 | have_band = true; | |
385 | } | |
386 | ||
387 | if (!have_band) { | |
388 | WARN_ON(1); | |
389 | return -EINVAL; | |
390 | } | |
391 | ||
392 | /* check and set up bitrates */ | |
393 | ieee80211_set_bitrate_flags(wiphy); | |
394 | ||
704232c2 JB |
395 | res = device_add(&drv->wiphy.dev); |
396 | if (res) | |
2f0accc1 | 397 | return res; |
704232c2 | 398 | |
1f87f7d3 JB |
399 | res = rfkill_register(drv->rfkill); |
400 | if (res) | |
401 | goto out_rm_dev; | |
402 | ||
2f0accc1 JB |
403 | mutex_lock(&cfg80211_mutex); |
404 | ||
405 | /* set up regulatory info */ | |
406 | wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE); | |
407 | ||
704232c2 JB |
408 | list_add(&drv->list, &cfg80211_drv_list); |
409 | ||
2f0accc1 JB |
410 | mutex_unlock(&cfg80211_mutex); |
411 | ||
704232c2 JB |
412 | /* add to debugfs */ |
413 | drv->wiphy.debugfsdir = | |
414 | debugfs_create_dir(wiphy_name(&drv->wiphy), | |
415 | ieee80211_debugfs_dir); | |
33c0360b JB |
416 | if (IS_ERR(drv->wiphy.debugfsdir)) |
417 | drv->wiphy.debugfsdir = NULL; | |
704232c2 | 418 | |
73d54c9e LR |
419 | if (wiphy->custom_regulatory) { |
420 | struct regulatory_request request; | |
421 | ||
422 | request.wiphy_idx = get_wiphy_idx(wiphy); | |
423 | request.initiator = NL80211_REGDOM_SET_BY_DRIVER; | |
424 | request.alpha2[0] = '9'; | |
425 | request.alpha2[1] = '9'; | |
426 | ||
427 | nl80211_send_reg_change_event(&request); | |
428 | } | |
429 | ||
1ac61302 LR |
430 | cfg80211_debugfs_drv_add(drv); |
431 | ||
2f0accc1 | 432 | return 0; |
1f87f7d3 JB |
433 | |
434 | out_rm_dev: | |
435 | device_del(&drv->wiphy.dev); | |
704232c2 JB |
436 | return res; |
437 | } | |
438 | EXPORT_SYMBOL(wiphy_register); | |
439 | ||
1f87f7d3 JB |
440 | void wiphy_rfkill_start_polling(struct wiphy *wiphy) |
441 | { | |
442 | struct cfg80211_registered_device *drv = wiphy_to_dev(wiphy); | |
443 | ||
444 | if (!drv->ops->rfkill_poll) | |
445 | return; | |
446 | drv->rfkill_ops.poll = cfg80211_rfkill_poll; | |
447 | rfkill_resume_polling(drv->rfkill); | |
448 | } | |
449 | EXPORT_SYMBOL(wiphy_rfkill_start_polling); | |
450 | ||
451 | void wiphy_rfkill_stop_polling(struct wiphy *wiphy) | |
452 | { | |
453 | struct cfg80211_registered_device *drv = wiphy_to_dev(wiphy); | |
454 | ||
455 | rfkill_pause_polling(drv->rfkill); | |
456 | } | |
457 | EXPORT_SYMBOL(wiphy_rfkill_stop_polling); | |
458 | ||
704232c2 JB |
459 | void wiphy_unregister(struct wiphy *wiphy) |
460 | { | |
461 | struct cfg80211_registered_device *drv = wiphy_to_dev(wiphy); | |
462 | ||
1f87f7d3 JB |
463 | rfkill_unregister(drv->rfkill); |
464 | ||
f16bfc1c | 465 | /* protect the device list */ |
a1794390 | 466 | mutex_lock(&cfg80211_mutex); |
704232c2 | 467 | |
f16bfc1c JB |
468 | BUG_ON(!list_empty(&drv->netdev_list)); |
469 | ||
470 | /* | |
471 | * Try to grab drv->mtx. If a command is still in progress, | |
472 | * hopefully the driver will refuse it since it's tearing | |
473 | * down the device already. We wait for this command to complete | |
474 | * before unlinking the item from the list. | |
475 | * Note: as codified by the BUG_ON above we cannot get here if | |
476 | * a virtual interface is still associated. Hence, we can only | |
477 | * get to lock contention here if userspace issues a command | |
478 | * that identified the hardware by wiphy index. | |
479 | */ | |
704232c2 | 480 | mutex_lock(&drv->mtx); |
f16bfc1c | 481 | /* unlock again before freeing */ |
704232c2 JB |
482 | mutex_unlock(&drv->mtx); |
483 | ||
1ac61302 LR |
484 | cfg80211_debugfs_drv_del(drv); |
485 | ||
3f2355cb LR |
486 | /* If this device got a regulatory hint tell core its |
487 | * free to listen now to a new shiny device regulatory hint */ | |
488 | reg_device_remove(wiphy); | |
489 | ||
f16bfc1c | 490 | list_del(&drv->list); |
704232c2 JB |
491 | device_del(&drv->wiphy.dev); |
492 | debugfs_remove(drv->wiphy.debugfsdir); | |
493 | ||
a1794390 | 494 | mutex_unlock(&cfg80211_mutex); |
704232c2 JB |
495 | } |
496 | EXPORT_SYMBOL(wiphy_unregister); | |
497 | ||
498 | void cfg80211_dev_free(struct cfg80211_registered_device *drv) | |
499 | { | |
2a519311 | 500 | struct cfg80211_internal_bss *scan, *tmp; |
1f87f7d3 | 501 | rfkill_destroy(drv->rfkill); |
704232c2 JB |
502 | mutex_destroy(&drv->mtx); |
503 | mutex_destroy(&drv->devlist_mtx); | |
2a519311 | 504 | list_for_each_entry_safe(scan, tmp, &drv->bss_list, list) |
78c1c7e1 | 505 | cfg80211_put_bss(&scan->pub); |
704232c2 JB |
506 | kfree(drv); |
507 | } | |
508 | ||
509 | void wiphy_free(struct wiphy *wiphy) | |
510 | { | |
511 | put_device(&wiphy->dev); | |
512 | } | |
513 | EXPORT_SYMBOL(wiphy_free); | |
514 | ||
1f87f7d3 JB |
515 | void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked) |
516 | { | |
517 | struct cfg80211_registered_device *drv = wiphy_to_dev(wiphy); | |
518 | ||
519 | if (rfkill_set_hw_state(drv->rfkill, blocked)) | |
520 | schedule_work(&drv->rfkill_sync); | |
521 | } | |
522 | EXPORT_SYMBOL(wiphy_rfkill_set_hw_state); | |
523 | ||
704232c2 JB |
524 | static int cfg80211_netdev_notifier_call(struct notifier_block * nb, |
525 | unsigned long state, | |
526 | void *ndev) | |
527 | { | |
528 | struct net_device *dev = ndev; | |
2a783c13 | 529 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
704232c2 JB |
530 | struct cfg80211_registered_device *rdev; |
531 | ||
2a783c13 | 532 | if (!wdev) |
1f87f7d3 | 533 | return NOTIFY_DONE; |
704232c2 | 534 | |
2a783c13 | 535 | rdev = wiphy_to_dev(wdev->wiphy); |
704232c2 | 536 | |
2a783c13 | 537 | WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); |
60719ffd | 538 | |
704232c2 JB |
539 | switch (state) { |
540 | case NETDEV_REGISTER: | |
541 | mutex_lock(&rdev->devlist_mtx); | |
2a783c13 | 542 | list_add(&wdev->list, &rdev->netdev_list); |
704232c2 JB |
543 | if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj, |
544 | "phy80211")) { | |
545 | printk(KERN_ERR "wireless: failed to add phy80211 " | |
546 | "symlink to netdev!\n"); | |
547 | } | |
2a783c13 | 548 | wdev->netdev = dev; |
08645126 | 549 | #ifdef CONFIG_WIRELESS_EXT |
2a783c13 JB |
550 | wdev->wext.default_key = -1; |
551 | wdev->wext.default_mgmt_key = -1; | |
08645126 | 552 | #endif |
704232c2 JB |
553 | mutex_unlock(&rdev->devlist_mtx); |
554 | break; | |
04a773ad | 555 | case NETDEV_GOING_DOWN: |
2a783c13 | 556 | if (wdev->iftype != NL80211_IFTYPE_ADHOC) |
04a773ad | 557 | break; |
2a783c13 | 558 | if (!wdev->ssid_len) |
04a773ad | 559 | break; |
9d308429 | 560 | cfg80211_leave_ibss(rdev, dev, true); |
04a773ad JB |
561 | break; |
562 | case NETDEV_UP: | |
563 | #ifdef CONFIG_WIRELESS_EXT | |
2a783c13 | 564 | if (wdev->iftype != NL80211_IFTYPE_ADHOC) |
04a773ad | 565 | break; |
2a783c13 | 566 | if (!wdev->wext.ibss.ssid_len) |
04a773ad | 567 | break; |
2a783c13 | 568 | cfg80211_join_ibss(rdev, dev, &wdev->wext.ibss); |
04a773ad | 569 | #endif |
2a783c13 | 570 | break; |
704232c2 JB |
571 | case NETDEV_UNREGISTER: |
572 | mutex_lock(&rdev->devlist_mtx); | |
2a783c13 | 573 | if (!list_empty(&wdev->list)) { |
704232c2 | 574 | sysfs_remove_link(&dev->dev.kobj, "phy80211"); |
2a783c13 | 575 | list_del_init(&wdev->list); |
704232c2 JB |
576 | } |
577 | mutex_unlock(&rdev->devlist_mtx); | |
578 | break; | |
1f87f7d3 JB |
579 | case NETDEV_PRE_UP: |
580 | if (rfkill_blocked(rdev->rfkill)) | |
581 | return notifier_from_errno(-ERFKILL); | |
582 | break; | |
704232c2 JB |
583 | } |
584 | ||
1f87f7d3 | 585 | return NOTIFY_DONE; |
704232c2 JB |
586 | } |
587 | ||
588 | static struct notifier_block cfg80211_netdev_notifier = { | |
589 | .notifier_call = cfg80211_netdev_notifier_call, | |
590 | }; | |
591 | ||
592 | static int cfg80211_init(void) | |
593 | { | |
b2e1b302 LR |
594 | int err; |
595 | ||
b2e1b302 | 596 | err = wiphy_sysfs_init(); |
704232c2 JB |
597 | if (err) |
598 | goto out_fail_sysfs; | |
599 | ||
600 | err = register_netdevice_notifier(&cfg80211_netdev_notifier); | |
601 | if (err) | |
602 | goto out_fail_notifier; | |
603 | ||
55682965 JB |
604 | err = nl80211_init(); |
605 | if (err) | |
606 | goto out_fail_nl80211; | |
607 | ||
704232c2 JB |
608 | ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); |
609 | ||
b2e1b302 LR |
610 | err = regulatory_init(); |
611 | if (err) | |
612 | goto out_fail_reg; | |
613 | ||
704232c2 JB |
614 | return 0; |
615 | ||
b2e1b302 LR |
616 | out_fail_reg: |
617 | debugfs_remove(ieee80211_debugfs_dir); | |
55682965 JB |
618 | out_fail_nl80211: |
619 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); | |
704232c2 JB |
620 | out_fail_notifier: |
621 | wiphy_sysfs_exit(); | |
622 | out_fail_sysfs: | |
623 | return err; | |
624 | } | |
b2e1b302 | 625 | |
3a462465 | 626 | subsys_initcall(cfg80211_init); |
704232c2 JB |
627 | |
628 | static void cfg80211_exit(void) | |
629 | { | |
630 | debugfs_remove(ieee80211_debugfs_dir); | |
55682965 | 631 | nl80211_exit(); |
704232c2 JB |
632 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); |
633 | wiphy_sysfs_exit(); | |
b2e1b302 | 634 | regulatory_exit(); |
704232c2 JB |
635 | } |
636 | module_exit(cfg80211_exit); |