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" |
a9a11622 | 22 | #include "wext-compat.h" |
704232c2 JB |
23 | |
24 | /* name for sysfs, %d is appended */ | |
25 | #define PHY_NAME "phy" | |
26 | ||
27 | MODULE_AUTHOR("Johannes Berg"); | |
28 | MODULE_LICENSE("GPL"); | |
29 | MODULE_DESCRIPTION("wireless configuration support"); | |
30 | ||
31 | /* RCU might be appropriate here since we usually | |
32 | * only read the list, and that can happen quite | |
33 | * often because we need to do it for each command */ | |
79c97e97 | 34 | LIST_HEAD(cfg80211_rdev_list); |
f5ea9120 | 35 | int cfg80211_rdev_list_generation; |
a1794390 LR |
36 | |
37 | /* | |
abc7381b | 38 | * This is used to protect the cfg80211_rdev_list |
a1794390 LR |
39 | */ |
40 | DEFINE_MUTEX(cfg80211_mutex); | |
704232c2 JB |
41 | |
42 | /* for debugfs */ | |
43 | static struct dentry *ieee80211_debugfs_dir; | |
44 | ||
806a9e39 | 45 | /* requires cfg80211_mutex to be held! */ |
79c97e97 | 46 | struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx) |
55682965 | 47 | { |
79c97e97 | 48 | struct cfg80211_registered_device *result = NULL, *rdev; |
55682965 | 49 | |
85fd129a LR |
50 | if (!wiphy_idx_valid(wiphy_idx)) |
51 | return NULL; | |
52 | ||
761cf7ec LR |
53 | assert_cfg80211_lock(); |
54 | ||
79c97e97 JB |
55 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
56 | if (rdev->wiphy_idx == wiphy_idx) { | |
57 | result = rdev; | |
55682965 JB |
58 | break; |
59 | } | |
60 | } | |
61 | ||
62 | return result; | |
63 | } | |
64 | ||
806a9e39 LR |
65 | int get_wiphy_idx(struct wiphy *wiphy) |
66 | { | |
79c97e97 | 67 | struct cfg80211_registered_device *rdev; |
806a9e39 LR |
68 | if (!wiphy) |
69 | return WIPHY_IDX_STALE; | |
79c97e97 JB |
70 | rdev = wiphy_to_dev(wiphy); |
71 | return rdev->wiphy_idx; | |
806a9e39 LR |
72 | } |
73 | ||
79c97e97 | 74 | /* requires cfg80211_rdev_mutex to be held! */ |
806a9e39 LR |
75 | struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx) |
76 | { | |
79c97e97 | 77 | struct cfg80211_registered_device *rdev; |
806a9e39 LR |
78 | |
79 | if (!wiphy_idx_valid(wiphy_idx)) | |
80 | return NULL; | |
81 | ||
82 | assert_cfg80211_lock(); | |
83 | ||
79c97e97 JB |
84 | rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx); |
85 | if (!rdev) | |
806a9e39 | 86 | return NULL; |
79c97e97 | 87 | return &rdev->wiphy; |
806a9e39 LR |
88 | } |
89 | ||
a1794390 | 90 | /* requires cfg80211_mutex to be held! */ |
4bbf4d56 | 91 | struct cfg80211_registered_device * |
79c97e97 | 92 | __cfg80211_rdev_from_info(struct genl_info *info) |
55682965 JB |
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]) { |
79c97e97 | 102 | bywiphyidx = cfg80211_rdev_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]); | |
463d0183 | 109 | dev = dev_get_by_index(genl_info_net(info), ifindex); |
55682965 JB |
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 | { | |
79c97e97 | 137 | struct cfg80211_registered_device *rdev; |
55682965 | 138 | |
a1794390 | 139 | mutex_lock(&cfg80211_mutex); |
79c97e97 | 140 | rdev = __cfg80211_rdev_from_info(info); |
55682965 JB |
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 */ | |
79c97e97 JB |
145 | if (!IS_ERR(rdev)) |
146 | mutex_lock(&rdev->mtx); | |
55682965 | 147 | |
a1794390 | 148 | mutex_unlock(&cfg80211_mutex); |
55682965 | 149 | |
79c97e97 | 150 | return rdev; |
55682965 JB |
151 | } |
152 | ||
153 | struct cfg80211_registered_device * | |
463d0183 | 154 | cfg80211_get_dev_from_ifindex(struct net *net, int ifindex) |
55682965 | 155 | { |
79c97e97 | 156 | struct cfg80211_registered_device *rdev = ERR_PTR(-ENODEV); |
55682965 JB |
157 | struct net_device *dev; |
158 | ||
a1794390 | 159 | mutex_lock(&cfg80211_mutex); |
463d0183 | 160 | dev = dev_get_by_index(net, ifindex); |
55682965 JB |
161 | if (!dev) |
162 | goto out; | |
163 | if (dev->ieee80211_ptr) { | |
79c97e97 JB |
164 | rdev = wiphy_to_dev(dev->ieee80211_ptr->wiphy); |
165 | mutex_lock(&rdev->mtx); | |
55682965 | 166 | } else |
79c97e97 | 167 | rdev = ERR_PTR(-ENODEV); |
55682965 JB |
168 | dev_put(dev); |
169 | out: | |
a1794390 | 170 | mutex_unlock(&cfg80211_mutex); |
79c97e97 | 171 | return rdev; |
55682965 JB |
172 | } |
173 | ||
4bbf4d56 | 174 | /* requires cfg80211_mutex to be held */ |
55682965 JB |
175 | int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, |
176 | char *newname) | |
177 | { | |
79c97e97 | 178 | struct cfg80211_registered_device *rdev2; |
b5850a7a | 179 | int wiphy_idx, taken = -1, result, digits; |
55682965 | 180 | |
4bbf4d56 | 181 | assert_cfg80211_lock(); |
2940bb69 | 182 | |
55682965 | 183 | /* prohibit calling the thing phy%d when %d is not its number */ |
b5850a7a LR |
184 | sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken); |
185 | if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) { | |
186 | /* count number of places needed to print wiphy_idx */ | |
55682965 | 187 | digits = 1; |
b5850a7a | 188 | while (wiphy_idx /= 10) |
55682965 JB |
189 | digits++; |
190 | /* | |
191 | * deny the name if it is phy<idx> where <idx> is printed | |
192 | * without leading zeroes. taken == strlen(newname) here | |
193 | */ | |
194 | if (taken == strlen(PHY_NAME) + digits) | |
4bbf4d56 | 195 | return -EINVAL; |
2940bb69 EB |
196 | } |
197 | ||
198 | ||
199 | /* Ignore nop renames */ | |
2940bb69 | 200 | if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0) |
4bbf4d56 | 201 | return 0; |
2940bb69 EB |
202 | |
203 | /* Ensure another device does not already have this name. */ | |
79c97e97 JB |
204 | list_for_each_entry(rdev2, &cfg80211_rdev_list, list) |
205 | if (strcmp(newname, dev_name(&rdev2->wiphy.dev)) == 0) | |
4bbf4d56 | 206 | return -EINVAL; |
55682965 | 207 | |
55682965 JB |
208 | result = device_rename(&rdev->wiphy.dev, newname); |
209 | if (result) | |
4bbf4d56 | 210 | return result; |
55682965 | 211 | |
33c0360b JB |
212 | if (rdev->wiphy.debugfsdir && |
213 | !debugfs_rename(rdev->wiphy.debugfsdir->d_parent, | |
55682965 JB |
214 | rdev->wiphy.debugfsdir, |
215 | rdev->wiphy.debugfsdir->d_parent, | |
216 | newname)) | |
217 | printk(KERN_ERR "cfg80211: failed to rename debugfs dir to %s!\n", | |
218 | newname); | |
219 | ||
4bbf4d56 | 220 | nl80211_notify_dev_rename(rdev); |
55682965 | 221 | |
4bbf4d56 | 222 | return 0; |
55682965 JB |
223 | } |
224 | ||
463d0183 JB |
225 | int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, |
226 | struct net *net) | |
227 | { | |
228 | struct wireless_dev *wdev; | |
229 | int err = 0; | |
230 | ||
231 | if (!rdev->wiphy.netnsok) | |
232 | return -EOPNOTSUPP; | |
233 | ||
234 | list_for_each_entry(wdev, &rdev->netdev_list, list) { | |
235 | wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; | |
236 | err = dev_change_net_namespace(wdev->netdev, net, "wlan%d"); | |
237 | if (err) | |
238 | break; | |
239 | wdev->netdev->features |= NETIF_F_NETNS_LOCAL; | |
240 | } | |
241 | ||
242 | if (err) { | |
243 | /* failed -- clean up to old netns */ | |
244 | net = wiphy_net(&rdev->wiphy); | |
245 | ||
246 | list_for_each_entry_continue_reverse(wdev, &rdev->netdev_list, | |
247 | list) { | |
248 | wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; | |
249 | err = dev_change_net_namespace(wdev->netdev, net, | |
250 | "wlan%d"); | |
251 | WARN_ON(err); | |
252 | wdev->netdev->features |= NETIF_F_NETNS_LOCAL; | |
253 | } | |
254 | } | |
255 | ||
256 | wiphy_net_set(&rdev->wiphy, net); | |
257 | ||
258 | return err; | |
259 | } | |
260 | ||
1f87f7d3 JB |
261 | static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data) |
262 | { | |
79c97e97 | 263 | struct cfg80211_registered_device *rdev = data; |
1f87f7d3 | 264 | |
79c97e97 | 265 | rdev->ops->rfkill_poll(&rdev->wiphy); |
1f87f7d3 JB |
266 | } |
267 | ||
268 | static int cfg80211_rfkill_set_block(void *data, bool blocked) | |
269 | { | |
79c97e97 | 270 | struct cfg80211_registered_device *rdev = data; |
1f87f7d3 JB |
271 | struct wireless_dev *wdev; |
272 | ||
273 | if (!blocked) | |
274 | return 0; | |
275 | ||
276 | rtnl_lock(); | |
79c97e97 | 277 | mutex_lock(&rdev->devlist_mtx); |
1f87f7d3 | 278 | |
79c97e97 | 279 | list_for_each_entry(wdev, &rdev->netdev_list, list) |
1f87f7d3 JB |
280 | dev_close(wdev->netdev); |
281 | ||
79c97e97 | 282 | mutex_unlock(&rdev->devlist_mtx); |
1f87f7d3 JB |
283 | rtnl_unlock(); |
284 | ||
285 | return 0; | |
286 | } | |
287 | ||
288 | static void cfg80211_rfkill_sync_work(struct work_struct *work) | |
289 | { | |
79c97e97 | 290 | struct cfg80211_registered_device *rdev; |
1f87f7d3 | 291 | |
79c97e97 JB |
292 | rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync); |
293 | cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill)); | |
1f87f7d3 JB |
294 | } |
295 | ||
667503dd JB |
296 | static void cfg80211_process_events(struct wireless_dev *wdev) |
297 | { | |
298 | struct cfg80211_event *ev; | |
299 | unsigned long flags; | |
300 | ||
301 | spin_lock_irqsave(&wdev->event_lock, flags); | |
302 | while (!list_empty(&wdev->event_list)) { | |
303 | ev = list_first_entry(&wdev->event_list, | |
304 | struct cfg80211_event, list); | |
305 | list_del(&ev->list); | |
306 | spin_unlock_irqrestore(&wdev->event_lock, flags); | |
307 | ||
308 | wdev_lock(wdev); | |
309 | switch (ev->type) { | |
310 | case EVENT_CONNECT_RESULT: | |
311 | __cfg80211_connect_result( | |
312 | wdev->netdev, ev->cr.bssid, | |
313 | ev->cr.req_ie, ev->cr.req_ie_len, | |
314 | ev->cr.resp_ie, ev->cr.resp_ie_len, | |
315 | ev->cr.status, | |
df7fc0f9 JB |
316 | ev->cr.status == WLAN_STATUS_SUCCESS, |
317 | NULL); | |
667503dd JB |
318 | break; |
319 | case EVENT_ROAMED: | |
320 | __cfg80211_roamed(wdev, ev->rm.bssid, | |
321 | ev->rm.req_ie, ev->rm.req_ie_len, | |
322 | ev->rm.resp_ie, ev->rm.resp_ie_len); | |
323 | break; | |
324 | case EVENT_DISCONNECTED: | |
325 | __cfg80211_disconnected(wdev->netdev, | |
326 | ev->dc.ie, ev->dc.ie_len, | |
327 | ev->dc.reason, true); | |
328 | break; | |
329 | case EVENT_IBSS_JOINED: | |
330 | __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid); | |
331 | break; | |
332 | } | |
333 | wdev_unlock(wdev); | |
334 | ||
335 | kfree(ev); | |
336 | ||
337 | spin_lock_irqsave(&wdev->event_lock, flags); | |
338 | } | |
339 | spin_unlock_irqrestore(&wdev->event_lock, flags); | |
340 | } | |
341 | ||
342 | static void cfg80211_event_work(struct work_struct *work) | |
343 | { | |
344 | struct cfg80211_registered_device *rdev; | |
345 | struct wireless_dev *wdev; | |
346 | ||
347 | rdev = container_of(work, struct cfg80211_registered_device, | |
348 | event_work); | |
349 | ||
350 | rtnl_lock(); | |
351 | cfg80211_lock_rdev(rdev); | |
352 | mutex_lock(&rdev->devlist_mtx); | |
353 | ||
354 | list_for_each_entry(wdev, &rdev->netdev_list, list) | |
355 | cfg80211_process_events(wdev); | |
356 | ||
357 | mutex_unlock(&rdev->devlist_mtx); | |
358 | cfg80211_unlock_rdev(rdev); | |
359 | rtnl_unlock(); | |
360 | } | |
361 | ||
704232c2 JB |
362 | /* exported functions */ |
363 | ||
3dcf670b | 364 | struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv) |
704232c2 | 365 | { |
638af073 DC |
366 | static int wiphy_counter; |
367 | ||
79c97e97 | 368 | struct cfg80211_registered_device *rdev; |
704232c2 JB |
369 | int alloc_size; |
370 | ||
0b20633d JB |
371 | WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key)); |
372 | WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc)); | |
373 | WARN_ON(ops->connect && !ops->disconnect); | |
374 | WARN_ON(ops->join_ibss && !ops->leave_ibss); | |
375 | WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf); | |
376 | WARN_ON(ops->add_station && !ops->del_station); | |
377 | WARN_ON(ops->add_mpath && !ops->del_mpath); | |
41ade00f | 378 | |
79c97e97 | 379 | alloc_size = sizeof(*rdev) + sizeof_priv; |
704232c2 | 380 | |
79c97e97 JB |
381 | rdev = kzalloc(alloc_size, GFP_KERNEL); |
382 | if (!rdev) | |
704232c2 JB |
383 | return NULL; |
384 | ||
79c97e97 | 385 | rdev->ops = ops; |
704232c2 | 386 | |
a1794390 | 387 | mutex_lock(&cfg80211_mutex); |
704232c2 | 388 | |
79c97e97 | 389 | rdev->wiphy_idx = wiphy_counter++; |
a4d73ee1 | 390 | |
79c97e97 | 391 | if (unlikely(!wiphy_idx_valid(rdev->wiphy_idx))) { |
638af073 | 392 | wiphy_counter--; |
a1794390 | 393 | mutex_unlock(&cfg80211_mutex); |
704232c2 | 394 | /* ugh, wrapped! */ |
79c97e97 | 395 | kfree(rdev); |
704232c2 JB |
396 | return NULL; |
397 | } | |
704232c2 | 398 | |
a1794390 | 399 | mutex_unlock(&cfg80211_mutex); |
638af073 | 400 | |
704232c2 | 401 | /* give it a proper name */ |
79c97e97 JB |
402 | dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx); |
403 | ||
404 | mutex_init(&rdev->mtx); | |
405 | mutex_init(&rdev->devlist_mtx); | |
406 | INIT_LIST_HEAD(&rdev->netdev_list); | |
407 | spin_lock_init(&rdev->bss_lock); | |
408 | INIT_LIST_HEAD(&rdev->bss_list); | |
409 | INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done); | |
410 | ||
411 | device_initialize(&rdev->wiphy.dev); | |
412 | rdev->wiphy.dev.class = &ieee80211_class; | |
413 | rdev->wiphy.dev.platform_data = rdev; | |
414 | ||
463d0183 JB |
415 | wiphy_net_set(&rdev->wiphy, &init_net); |
416 | ||
79c97e97 JB |
417 | rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block; |
418 | rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev), | |
419 | &rdev->wiphy.dev, RFKILL_TYPE_WLAN, | |
420 | &rdev->rfkill_ops, rdev); | |
421 | ||
422 | if (!rdev->rfkill) { | |
423 | kfree(rdev); | |
1f87f7d3 JB |
424 | return NULL; |
425 | } | |
426 | ||
79c97e97 JB |
427 | INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work); |
428 | INIT_WORK(&rdev->conn_work, cfg80211_conn_work); | |
429 | INIT_WORK(&rdev->event_work, cfg80211_event_work); | |
1f87f7d3 | 430 | |
b9a5f8ca JM |
431 | /* |
432 | * Initialize wiphy parameters to IEEE 802.11 MIB default values. | |
433 | * Fragmentation and RTS threshold are disabled by default with the | |
434 | * special -1 value. | |
435 | */ | |
79c97e97 JB |
436 | rdev->wiphy.retry_short = 7; |
437 | rdev->wiphy.retry_long = 4; | |
438 | rdev->wiphy.frag_threshold = (u32) -1; | |
439 | rdev->wiphy.rts_threshold = (u32) -1; | |
b9a5f8ca | 440 | |
79c97e97 | 441 | return &rdev->wiphy; |
704232c2 JB |
442 | } |
443 | EXPORT_SYMBOL(wiphy_new); | |
444 | ||
445 | int wiphy_register(struct wiphy *wiphy) | |
446 | { | |
79c97e97 | 447 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
704232c2 | 448 | int res; |
8318d78a JB |
449 | enum ieee80211_band band; |
450 | struct ieee80211_supported_band *sband; | |
451 | bool have_band = false; | |
452 | int i; | |
f59ac048 LR |
453 | u16 ifmodes = wiphy->interface_modes; |
454 | ||
455 | /* sanity check ifmodes */ | |
456 | WARN_ON(!ifmodes); | |
457 | ifmodes &= ((1 << __NL80211_IFTYPE_AFTER_LAST) - 1) & ~1; | |
458 | if (WARN_ON(ifmodes != wiphy->interface_modes)) | |
459 | wiphy->interface_modes = ifmodes; | |
8318d78a JB |
460 | |
461 | /* sanity check supported bands/channels */ | |
462 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
463 | sband = wiphy->bands[band]; | |
464 | if (!sband) | |
465 | continue; | |
466 | ||
467 | sband->band = band; | |
468 | ||
881d948c JB |
469 | if (WARN_ON(!sband->n_channels || !sband->n_bitrates)) |
470 | return -EINVAL; | |
471 | ||
472 | /* | |
473 | * Since we use a u32 for rate bitmaps in | |
474 | * ieee80211_get_response_rate, we cannot | |
475 | * have more than 32 legacy rates. | |
476 | */ | |
477 | if (WARN_ON(sband->n_bitrates > 32)) | |
8318d78a | 478 | return -EINVAL; |
8318d78a JB |
479 | |
480 | for (i = 0; i < sband->n_channels; i++) { | |
481 | sband->channels[i].orig_flags = | |
482 | sband->channels[i].flags; | |
483 | sband->channels[i].orig_mag = | |
484 | sband->channels[i].max_antenna_gain; | |
485 | sband->channels[i].orig_mpwr = | |
486 | sband->channels[i].max_power; | |
487 | sband->channels[i].band = band; | |
488 | } | |
489 | ||
490 | have_band = true; | |
491 | } | |
492 | ||
493 | if (!have_band) { | |
494 | WARN_ON(1); | |
495 | return -EINVAL; | |
496 | } | |
497 | ||
498 | /* check and set up bitrates */ | |
499 | ieee80211_set_bitrate_flags(wiphy); | |
500 | ||
79c97e97 | 501 | res = device_add(&rdev->wiphy.dev); |
704232c2 | 502 | if (res) |
2f0accc1 | 503 | return res; |
704232c2 | 504 | |
79c97e97 | 505 | res = rfkill_register(rdev->rfkill); |
1f87f7d3 JB |
506 | if (res) |
507 | goto out_rm_dev; | |
508 | ||
2f0accc1 JB |
509 | mutex_lock(&cfg80211_mutex); |
510 | ||
511 | /* set up regulatory info */ | |
512 | wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE); | |
513 | ||
79c97e97 | 514 | list_add(&rdev->list, &cfg80211_rdev_list); |
f5ea9120 | 515 | cfg80211_rdev_list_generation++; |
704232c2 | 516 | |
2f0accc1 JB |
517 | mutex_unlock(&cfg80211_mutex); |
518 | ||
704232c2 | 519 | /* add to debugfs */ |
79c97e97 JB |
520 | rdev->wiphy.debugfsdir = |
521 | debugfs_create_dir(wiphy_name(&rdev->wiphy), | |
704232c2 | 522 | ieee80211_debugfs_dir); |
79c97e97 JB |
523 | if (IS_ERR(rdev->wiphy.debugfsdir)) |
524 | rdev->wiphy.debugfsdir = NULL; | |
704232c2 | 525 | |
73d54c9e LR |
526 | if (wiphy->custom_regulatory) { |
527 | struct regulatory_request request; | |
528 | ||
529 | request.wiphy_idx = get_wiphy_idx(wiphy); | |
530 | request.initiator = NL80211_REGDOM_SET_BY_DRIVER; | |
531 | request.alpha2[0] = '9'; | |
532 | request.alpha2[1] = '9'; | |
533 | ||
534 | nl80211_send_reg_change_event(&request); | |
535 | } | |
536 | ||
79c97e97 | 537 | cfg80211_debugfs_rdev_add(rdev); |
1ac61302 | 538 | |
2f0accc1 | 539 | return 0; |
1f87f7d3 JB |
540 | |
541 | out_rm_dev: | |
79c97e97 | 542 | device_del(&rdev->wiphy.dev); |
704232c2 JB |
543 | return res; |
544 | } | |
545 | EXPORT_SYMBOL(wiphy_register); | |
546 | ||
1f87f7d3 JB |
547 | void wiphy_rfkill_start_polling(struct wiphy *wiphy) |
548 | { | |
79c97e97 | 549 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 550 | |
79c97e97 | 551 | if (!rdev->ops->rfkill_poll) |
1f87f7d3 | 552 | return; |
79c97e97 JB |
553 | rdev->rfkill_ops.poll = cfg80211_rfkill_poll; |
554 | rfkill_resume_polling(rdev->rfkill); | |
1f87f7d3 JB |
555 | } |
556 | EXPORT_SYMBOL(wiphy_rfkill_start_polling); | |
557 | ||
558 | void wiphy_rfkill_stop_polling(struct wiphy *wiphy) | |
559 | { | |
79c97e97 | 560 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 561 | |
79c97e97 | 562 | rfkill_pause_polling(rdev->rfkill); |
1f87f7d3 JB |
563 | } |
564 | EXPORT_SYMBOL(wiphy_rfkill_stop_polling); | |
565 | ||
704232c2 JB |
566 | void wiphy_unregister(struct wiphy *wiphy) |
567 | { | |
79c97e97 | 568 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
704232c2 | 569 | |
79c97e97 | 570 | rfkill_unregister(rdev->rfkill); |
1f87f7d3 | 571 | |
f16bfc1c | 572 | /* protect the device list */ |
a1794390 | 573 | mutex_lock(&cfg80211_mutex); |
704232c2 | 574 | |
79c97e97 | 575 | BUG_ON(!list_empty(&rdev->netdev_list)); |
f16bfc1c JB |
576 | |
577 | /* | |
79c97e97 | 578 | * Try to grab rdev->mtx. If a command is still in progress, |
f16bfc1c JB |
579 | * hopefully the driver will refuse it since it's tearing |
580 | * down the device already. We wait for this command to complete | |
581 | * before unlinking the item from the list. | |
582 | * Note: as codified by the BUG_ON above we cannot get here if | |
583 | * a virtual interface is still associated. Hence, we can only | |
584 | * get to lock contention here if userspace issues a command | |
585 | * that identified the hardware by wiphy index. | |
586 | */ | |
79c97e97 | 587 | mutex_lock(&rdev->mtx); |
f16bfc1c | 588 | /* unlock again before freeing */ |
79c97e97 | 589 | mutex_unlock(&rdev->mtx); |
704232c2 | 590 | |
79c97e97 | 591 | cfg80211_debugfs_rdev_del(rdev); |
1ac61302 | 592 | |
3f2355cb LR |
593 | /* If this device got a regulatory hint tell core its |
594 | * free to listen now to a new shiny device regulatory hint */ | |
595 | reg_device_remove(wiphy); | |
596 | ||
79c97e97 | 597 | list_del(&rdev->list); |
f5ea9120 | 598 | cfg80211_rdev_list_generation++; |
79c97e97 JB |
599 | device_del(&rdev->wiphy.dev); |
600 | debugfs_remove(rdev->wiphy.debugfsdir); | |
704232c2 | 601 | |
a1794390 | 602 | mutex_unlock(&cfg80211_mutex); |
6682588a JB |
603 | |
604 | cancel_work_sync(&rdev->conn_work); | |
605 | cancel_work_sync(&rdev->scan_done_wk); | |
606 | kfree(rdev->scan_req); | |
607 | flush_work(&rdev->event_work); | |
704232c2 JB |
608 | } |
609 | EXPORT_SYMBOL(wiphy_unregister); | |
610 | ||
79c97e97 | 611 | void cfg80211_dev_free(struct cfg80211_registered_device *rdev) |
704232c2 | 612 | { |
2a519311 | 613 | struct cfg80211_internal_bss *scan, *tmp; |
79c97e97 JB |
614 | rfkill_destroy(rdev->rfkill); |
615 | mutex_destroy(&rdev->mtx); | |
616 | mutex_destroy(&rdev->devlist_mtx); | |
617 | list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list) | |
78c1c7e1 | 618 | cfg80211_put_bss(&scan->pub); |
79c97e97 | 619 | kfree(rdev); |
704232c2 JB |
620 | } |
621 | ||
622 | void wiphy_free(struct wiphy *wiphy) | |
623 | { | |
624 | put_device(&wiphy->dev); | |
625 | } | |
626 | EXPORT_SYMBOL(wiphy_free); | |
627 | ||
1f87f7d3 JB |
628 | void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked) |
629 | { | |
79c97e97 | 630 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 631 | |
79c97e97 JB |
632 | if (rfkill_set_hw_state(rdev->rfkill, blocked)) |
633 | schedule_work(&rdev->rfkill_sync); | |
1f87f7d3 JB |
634 | } |
635 | EXPORT_SYMBOL(wiphy_rfkill_set_hw_state); | |
636 | ||
704232c2 JB |
637 | static int cfg80211_netdev_notifier_call(struct notifier_block * nb, |
638 | unsigned long state, | |
639 | void *ndev) | |
640 | { | |
641 | struct net_device *dev = ndev; | |
2a783c13 | 642 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
704232c2 JB |
643 | struct cfg80211_registered_device *rdev; |
644 | ||
2a783c13 | 645 | if (!wdev) |
1f87f7d3 | 646 | return NOTIFY_DONE; |
704232c2 | 647 | |
2a783c13 | 648 | rdev = wiphy_to_dev(wdev->wiphy); |
704232c2 | 649 | |
2a783c13 | 650 | WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); |
60719ffd | 651 | |
704232c2 JB |
652 | switch (state) { |
653 | case NETDEV_REGISTER: | |
667503dd JB |
654 | mutex_init(&wdev->mtx); |
655 | INIT_LIST_HEAD(&wdev->event_list); | |
656 | spin_lock_init(&wdev->event_lock); | |
704232c2 | 657 | mutex_lock(&rdev->devlist_mtx); |
2a783c13 | 658 | list_add(&wdev->list, &rdev->netdev_list); |
f5ea9120 | 659 | rdev->devlist_generation++; |
463d0183 JB |
660 | /* can only change netns with wiphy */ |
661 | dev->features |= NETIF_F_NETNS_LOCAL; | |
662 | ||
704232c2 JB |
663 | if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj, |
664 | "phy80211")) { | |
665 | printk(KERN_ERR "wireless: failed to add phy80211 " | |
666 | "symlink to netdev!\n"); | |
667 | } | |
2a783c13 | 668 | wdev->netdev = dev; |
b23aa676 | 669 | wdev->sme_state = CFG80211_SME_IDLE; |
bc92afd9 | 670 | mutex_unlock(&rdev->devlist_mtx); |
08645126 | 671 | #ifdef CONFIG_WIRELESS_EXT |
a9a11622 JB |
672 | if (!dev->wireless_handlers) |
673 | dev->wireless_handlers = &cfg80211_wext_handler; | |
2a783c13 JB |
674 | wdev->wext.default_key = -1; |
675 | wdev->wext.default_mgmt_key = -1; | |
f2129354 | 676 | wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; |
bc92afd9 | 677 | wdev->wext.ps = CONFIG_CFG80211_DEFAULT_PS_VALUE; |
75e6c3b7 | 678 | wdev->wext.ps_timeout = 100; |
bc92afd9 JB |
679 | if (rdev->ops->set_power_mgmt) |
680 | if (rdev->ops->set_power_mgmt(wdev->wiphy, dev, | |
681 | wdev->wext.ps, | |
682 | wdev->wext.ps_timeout)) { | |
683 | /* assume this means it's off */ | |
684 | wdev->wext.ps = false; | |
685 | } | |
08645126 | 686 | #endif |
704232c2 | 687 | break; |
04a773ad | 688 | case NETDEV_GOING_DOWN: |
b23aa676 SO |
689 | switch (wdev->iftype) { |
690 | case NL80211_IFTYPE_ADHOC: | |
691 | cfg80211_leave_ibss(rdev, dev, true); | |
692 | break; | |
693 | case NL80211_IFTYPE_STATION: | |
667503dd | 694 | wdev_lock(wdev); |
f2129354 JB |
695 | #ifdef CONFIG_WIRELESS_EXT |
696 | kfree(wdev->wext.ie); | |
697 | wdev->wext.ie = NULL; | |
698 | wdev->wext.ie_len = 0; | |
0eb14647 | 699 | wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; |
f2129354 | 700 | #endif |
667503dd JB |
701 | __cfg80211_disconnect(rdev, dev, |
702 | WLAN_REASON_DEAUTH_LEAVING, true); | |
19957bb3 | 703 | cfg80211_mlme_down(rdev, dev); |
667503dd | 704 | wdev_unlock(wdev); |
b23aa676 SO |
705 | break; |
706 | default: | |
707 | break; | |
708 | } | |
04a773ad JB |
709 | break; |
710 | case NETDEV_UP: | |
711 | #ifdef CONFIG_WIRELESS_EXT | |
667503dd JB |
712 | cfg80211_lock_rdev(rdev); |
713 | wdev_lock(wdev); | |
f2129354 JB |
714 | switch (wdev->iftype) { |
715 | case NL80211_IFTYPE_ADHOC: | |
fffd0934 | 716 | cfg80211_ibss_wext_join(rdev, wdev); |
04a773ad | 717 | break; |
f2129354 | 718 | case NL80211_IFTYPE_STATION: |
fffd0934 | 719 | cfg80211_mgd_wext_connect(rdev, wdev); |
f2129354 JB |
720 | break; |
721 | default: | |
04a773ad | 722 | break; |
f2129354 | 723 | } |
667503dd JB |
724 | wdev_unlock(wdev); |
725 | cfg80211_unlock_rdev(rdev); | |
04a773ad | 726 | #endif |
2a783c13 | 727 | break; |
704232c2 JB |
728 | case NETDEV_UNREGISTER: |
729 | mutex_lock(&rdev->devlist_mtx); | |
e40cbdac JB |
730 | /* |
731 | * It is possible to get NETDEV_UNREGISTER | |
732 | * multiple times. To detect that, check | |
733 | * that the interface is still on the list | |
734 | * of registered interfaces, and only then | |
735 | * remove and clean it up. | |
736 | */ | |
2a783c13 | 737 | if (!list_empty(&wdev->list)) { |
704232c2 | 738 | sysfs_remove_link(&dev->dev.kobj, "phy80211"); |
2a783c13 | 739 | list_del_init(&wdev->list); |
f5ea9120 | 740 | rdev->devlist_generation++; |
e40cbdac | 741 | mutex_destroy(&wdev->mtx); |
fffd0934 | 742 | #ifdef CONFIG_WIRELESS_EXT |
e40cbdac | 743 | kfree(wdev->wext.keys); |
fffd0934 | 744 | #endif |
e40cbdac JB |
745 | } |
746 | mutex_unlock(&rdev->devlist_mtx); | |
704232c2 | 747 | break; |
1f87f7d3 | 748 | case NETDEV_PRE_UP: |
0b20633d JB |
749 | if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype))) |
750 | return notifier_from_errno(-EOPNOTSUPP); | |
1f87f7d3 JB |
751 | if (rfkill_blocked(rdev->rfkill)) |
752 | return notifier_from_errno(-ERFKILL); | |
753 | break; | |
704232c2 JB |
754 | } |
755 | ||
1f87f7d3 | 756 | return NOTIFY_DONE; |
704232c2 JB |
757 | } |
758 | ||
759 | static struct notifier_block cfg80211_netdev_notifier = { | |
760 | .notifier_call = cfg80211_netdev_notifier_call, | |
761 | }; | |
762 | ||
463d0183 JB |
763 | static void __net_exit cfg80211_pernet_exit(struct net *net) |
764 | { | |
765 | struct cfg80211_registered_device *rdev; | |
766 | ||
767 | rtnl_lock(); | |
768 | mutex_lock(&cfg80211_mutex); | |
769 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
770 | if (net_eq(wiphy_net(&rdev->wiphy), net)) | |
771 | WARN_ON(cfg80211_switch_netns(rdev, &init_net)); | |
772 | } | |
773 | mutex_unlock(&cfg80211_mutex); | |
774 | rtnl_unlock(); | |
775 | } | |
776 | ||
777 | static struct pernet_operations cfg80211_pernet_ops = { | |
778 | .exit = cfg80211_pernet_exit, | |
779 | }; | |
780 | ||
781 | static int __init cfg80211_init(void) | |
704232c2 | 782 | { |
b2e1b302 LR |
783 | int err; |
784 | ||
463d0183 JB |
785 | err = register_pernet_device(&cfg80211_pernet_ops); |
786 | if (err) | |
787 | goto out_fail_pernet; | |
788 | ||
b2e1b302 | 789 | err = wiphy_sysfs_init(); |
704232c2 JB |
790 | if (err) |
791 | goto out_fail_sysfs; | |
792 | ||
793 | err = register_netdevice_notifier(&cfg80211_netdev_notifier); | |
794 | if (err) | |
795 | goto out_fail_notifier; | |
796 | ||
55682965 JB |
797 | err = nl80211_init(); |
798 | if (err) | |
799 | goto out_fail_nl80211; | |
800 | ||
704232c2 JB |
801 | ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); |
802 | ||
b2e1b302 LR |
803 | err = regulatory_init(); |
804 | if (err) | |
805 | goto out_fail_reg; | |
806 | ||
704232c2 JB |
807 | return 0; |
808 | ||
b2e1b302 LR |
809 | out_fail_reg: |
810 | debugfs_remove(ieee80211_debugfs_dir); | |
55682965 JB |
811 | out_fail_nl80211: |
812 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); | |
704232c2 JB |
813 | out_fail_notifier: |
814 | wiphy_sysfs_exit(); | |
815 | out_fail_sysfs: | |
463d0183 JB |
816 | unregister_pernet_device(&cfg80211_pernet_ops); |
817 | out_fail_pernet: | |
704232c2 JB |
818 | return err; |
819 | } | |
3a462465 | 820 | subsys_initcall(cfg80211_init); |
704232c2 JB |
821 | |
822 | static void cfg80211_exit(void) | |
823 | { | |
824 | debugfs_remove(ieee80211_debugfs_dir); | |
55682965 | 825 | nl80211_exit(); |
704232c2 JB |
826 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); |
827 | wiphy_sysfs_exit(); | |
b2e1b302 | 828 | regulatory_exit(); |
463d0183 | 829 | unregister_pernet_device(&cfg80211_pernet_ops); |
704232c2 JB |
830 | } |
831 | module_exit(cfg80211_exit); |