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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); |
a1794390 LR |
35 | |
36 | /* | |
abc7381b | 37 | * This is used to protect the cfg80211_rdev_list |
a1794390 LR |
38 | */ |
39 | DEFINE_MUTEX(cfg80211_mutex); | |
704232c2 JB |
40 | |
41 | /* for debugfs */ | |
42 | static struct dentry *ieee80211_debugfs_dir; | |
43 | ||
806a9e39 | 44 | /* requires cfg80211_mutex to be held! */ |
79c97e97 | 45 | struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx) |
55682965 | 46 | { |
79c97e97 | 47 | struct cfg80211_registered_device *result = NULL, *rdev; |
55682965 | 48 | |
85fd129a LR |
49 | if (!wiphy_idx_valid(wiphy_idx)) |
50 | return NULL; | |
51 | ||
761cf7ec LR |
52 | assert_cfg80211_lock(); |
53 | ||
79c97e97 JB |
54 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
55 | if (rdev->wiphy_idx == wiphy_idx) { | |
56 | result = rdev; | |
55682965 JB |
57 | break; |
58 | } | |
59 | } | |
60 | ||
61 | return result; | |
62 | } | |
63 | ||
806a9e39 LR |
64 | int get_wiphy_idx(struct wiphy *wiphy) |
65 | { | |
79c97e97 | 66 | struct cfg80211_registered_device *rdev; |
806a9e39 LR |
67 | if (!wiphy) |
68 | return WIPHY_IDX_STALE; | |
79c97e97 JB |
69 | rdev = wiphy_to_dev(wiphy); |
70 | return rdev->wiphy_idx; | |
806a9e39 LR |
71 | } |
72 | ||
79c97e97 | 73 | /* requires cfg80211_rdev_mutex to be held! */ |
806a9e39 LR |
74 | struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx) |
75 | { | |
79c97e97 | 76 | struct cfg80211_registered_device *rdev; |
806a9e39 LR |
77 | |
78 | if (!wiphy_idx_valid(wiphy_idx)) | |
79 | return NULL; | |
80 | ||
81 | assert_cfg80211_lock(); | |
82 | ||
79c97e97 JB |
83 | rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx); |
84 | if (!rdev) | |
806a9e39 | 85 | return NULL; |
79c97e97 | 86 | return &rdev->wiphy; |
806a9e39 LR |
87 | } |
88 | ||
a1794390 | 89 | /* requires cfg80211_mutex to be held! */ |
4bbf4d56 | 90 | struct cfg80211_registered_device * |
79c97e97 | 91 | __cfg80211_rdev_from_info(struct genl_info *info) |
55682965 JB |
92 | { |
93 | int ifindex; | |
b5850a7a | 94 | struct cfg80211_registered_device *bywiphyidx = NULL, *byifidx = NULL; |
55682965 JB |
95 | struct net_device *dev; |
96 | int err = -EINVAL; | |
97 | ||
761cf7ec LR |
98 | assert_cfg80211_lock(); |
99 | ||
55682965 | 100 | if (info->attrs[NL80211_ATTR_WIPHY]) { |
79c97e97 | 101 | bywiphyidx = cfg80211_rdev_by_wiphy_idx( |
55682965 JB |
102 | nla_get_u32(info->attrs[NL80211_ATTR_WIPHY])); |
103 | err = -ENODEV; | |
104 | } | |
105 | ||
106 | if (info->attrs[NL80211_ATTR_IFINDEX]) { | |
107 | ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]); | |
463d0183 | 108 | dev = dev_get_by_index(genl_info_net(info), ifindex); |
55682965 JB |
109 | if (dev) { |
110 | if (dev->ieee80211_ptr) | |
111 | byifidx = | |
112 | wiphy_to_dev(dev->ieee80211_ptr->wiphy); | |
113 | dev_put(dev); | |
114 | } | |
115 | err = -ENODEV; | |
116 | } | |
117 | ||
b5850a7a LR |
118 | if (bywiphyidx && byifidx) { |
119 | if (bywiphyidx != byifidx) | |
55682965 JB |
120 | return ERR_PTR(-EINVAL); |
121 | else | |
b5850a7a | 122 | return bywiphyidx; /* == byifidx */ |
55682965 | 123 | } |
b5850a7a LR |
124 | if (bywiphyidx) |
125 | return bywiphyidx; | |
55682965 JB |
126 | |
127 | if (byifidx) | |
128 | return byifidx; | |
129 | ||
130 | return ERR_PTR(err); | |
131 | } | |
132 | ||
133 | struct cfg80211_registered_device * | |
134 | cfg80211_get_dev_from_info(struct genl_info *info) | |
135 | { | |
79c97e97 | 136 | struct cfg80211_registered_device *rdev; |
55682965 | 137 | |
a1794390 | 138 | mutex_lock(&cfg80211_mutex); |
79c97e97 | 139 | rdev = __cfg80211_rdev_from_info(info); |
55682965 JB |
140 | |
141 | /* if it is not an error we grab the lock on | |
142 | * it to assure it won't be going away while | |
143 | * we operate on it */ | |
79c97e97 JB |
144 | if (!IS_ERR(rdev)) |
145 | mutex_lock(&rdev->mtx); | |
55682965 | 146 | |
a1794390 | 147 | mutex_unlock(&cfg80211_mutex); |
55682965 | 148 | |
79c97e97 | 149 | return rdev; |
55682965 JB |
150 | } |
151 | ||
152 | struct cfg80211_registered_device * | |
463d0183 | 153 | cfg80211_get_dev_from_ifindex(struct net *net, int ifindex) |
55682965 | 154 | { |
79c97e97 | 155 | struct cfg80211_registered_device *rdev = ERR_PTR(-ENODEV); |
55682965 JB |
156 | struct net_device *dev; |
157 | ||
a1794390 | 158 | mutex_lock(&cfg80211_mutex); |
463d0183 | 159 | dev = dev_get_by_index(net, ifindex); |
55682965 JB |
160 | if (!dev) |
161 | goto out; | |
162 | if (dev->ieee80211_ptr) { | |
79c97e97 JB |
163 | rdev = wiphy_to_dev(dev->ieee80211_ptr->wiphy); |
164 | mutex_lock(&rdev->mtx); | |
55682965 | 165 | } else |
79c97e97 | 166 | rdev = ERR_PTR(-ENODEV); |
55682965 JB |
167 | dev_put(dev); |
168 | out: | |
a1794390 | 169 | mutex_unlock(&cfg80211_mutex); |
79c97e97 | 170 | return rdev; |
55682965 JB |
171 | } |
172 | ||
4bbf4d56 | 173 | /* requires cfg80211_mutex to be held */ |
55682965 JB |
174 | int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, |
175 | char *newname) | |
176 | { | |
79c97e97 | 177 | struct cfg80211_registered_device *rdev2; |
b5850a7a | 178 | int wiphy_idx, taken = -1, result, digits; |
55682965 | 179 | |
4bbf4d56 | 180 | assert_cfg80211_lock(); |
2940bb69 | 181 | |
55682965 | 182 | /* prohibit calling the thing phy%d when %d is not its number */ |
b5850a7a LR |
183 | sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken); |
184 | if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) { | |
185 | /* count number of places needed to print wiphy_idx */ | |
55682965 | 186 | digits = 1; |
b5850a7a | 187 | while (wiphy_idx /= 10) |
55682965 JB |
188 | digits++; |
189 | /* | |
190 | * deny the name if it is phy<idx> where <idx> is printed | |
191 | * without leading zeroes. taken == strlen(newname) here | |
192 | */ | |
193 | if (taken == strlen(PHY_NAME) + digits) | |
4bbf4d56 | 194 | return -EINVAL; |
2940bb69 EB |
195 | } |
196 | ||
197 | ||
198 | /* Ignore nop renames */ | |
2940bb69 | 199 | if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0) |
4bbf4d56 | 200 | return 0; |
2940bb69 EB |
201 | |
202 | /* Ensure another device does not already have this name. */ | |
79c97e97 JB |
203 | list_for_each_entry(rdev2, &cfg80211_rdev_list, list) |
204 | if (strcmp(newname, dev_name(&rdev2->wiphy.dev)) == 0) | |
4bbf4d56 | 205 | return -EINVAL; |
55682965 | 206 | |
55682965 JB |
207 | result = device_rename(&rdev->wiphy.dev, newname); |
208 | if (result) | |
4bbf4d56 | 209 | return result; |
55682965 | 210 | |
33c0360b JB |
211 | if (rdev->wiphy.debugfsdir && |
212 | !debugfs_rename(rdev->wiphy.debugfsdir->d_parent, | |
55682965 JB |
213 | rdev->wiphy.debugfsdir, |
214 | rdev->wiphy.debugfsdir->d_parent, | |
215 | newname)) | |
216 | printk(KERN_ERR "cfg80211: failed to rename debugfs dir to %s!\n", | |
217 | newname); | |
218 | ||
4bbf4d56 | 219 | nl80211_notify_dev_rename(rdev); |
55682965 | 220 | |
4bbf4d56 | 221 | return 0; |
55682965 JB |
222 | } |
223 | ||
463d0183 JB |
224 | int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, |
225 | struct net *net) | |
226 | { | |
227 | struct wireless_dev *wdev; | |
228 | int err = 0; | |
229 | ||
230 | if (!rdev->wiphy.netnsok) | |
231 | return -EOPNOTSUPP; | |
232 | ||
233 | list_for_each_entry(wdev, &rdev->netdev_list, list) { | |
234 | wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; | |
235 | err = dev_change_net_namespace(wdev->netdev, net, "wlan%d"); | |
236 | if (err) | |
237 | break; | |
238 | wdev->netdev->features |= NETIF_F_NETNS_LOCAL; | |
239 | } | |
240 | ||
241 | if (err) { | |
242 | /* failed -- clean up to old netns */ | |
243 | net = wiphy_net(&rdev->wiphy); | |
244 | ||
245 | list_for_each_entry_continue_reverse(wdev, &rdev->netdev_list, | |
246 | list) { | |
247 | wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; | |
248 | err = dev_change_net_namespace(wdev->netdev, net, | |
249 | "wlan%d"); | |
250 | WARN_ON(err); | |
251 | wdev->netdev->features |= NETIF_F_NETNS_LOCAL; | |
252 | } | |
253 | } | |
254 | ||
255 | wiphy_net_set(&rdev->wiphy, net); | |
256 | ||
257 | return err; | |
258 | } | |
259 | ||
1f87f7d3 JB |
260 | static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data) |
261 | { | |
79c97e97 | 262 | struct cfg80211_registered_device *rdev = data; |
1f87f7d3 | 263 | |
79c97e97 | 264 | rdev->ops->rfkill_poll(&rdev->wiphy); |
1f87f7d3 JB |
265 | } |
266 | ||
267 | static int cfg80211_rfkill_set_block(void *data, bool blocked) | |
268 | { | |
79c97e97 | 269 | struct cfg80211_registered_device *rdev = data; |
1f87f7d3 JB |
270 | struct wireless_dev *wdev; |
271 | ||
272 | if (!blocked) | |
273 | return 0; | |
274 | ||
275 | rtnl_lock(); | |
79c97e97 | 276 | mutex_lock(&rdev->devlist_mtx); |
1f87f7d3 | 277 | |
79c97e97 | 278 | list_for_each_entry(wdev, &rdev->netdev_list, list) |
1f87f7d3 JB |
279 | dev_close(wdev->netdev); |
280 | ||
79c97e97 | 281 | mutex_unlock(&rdev->devlist_mtx); |
1f87f7d3 JB |
282 | rtnl_unlock(); |
283 | ||
284 | return 0; | |
285 | } | |
286 | ||
287 | static void cfg80211_rfkill_sync_work(struct work_struct *work) | |
288 | { | |
79c97e97 | 289 | struct cfg80211_registered_device *rdev; |
1f87f7d3 | 290 | |
79c97e97 JB |
291 | rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync); |
292 | cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill)); | |
1f87f7d3 JB |
293 | } |
294 | ||
667503dd JB |
295 | static void cfg80211_process_events(struct wireless_dev *wdev) |
296 | { | |
297 | struct cfg80211_event *ev; | |
298 | unsigned long flags; | |
299 | ||
300 | spin_lock_irqsave(&wdev->event_lock, flags); | |
301 | while (!list_empty(&wdev->event_list)) { | |
302 | ev = list_first_entry(&wdev->event_list, | |
303 | struct cfg80211_event, list); | |
304 | list_del(&ev->list); | |
305 | spin_unlock_irqrestore(&wdev->event_lock, flags); | |
306 | ||
307 | wdev_lock(wdev); | |
308 | switch (ev->type) { | |
309 | case EVENT_CONNECT_RESULT: | |
310 | __cfg80211_connect_result( | |
311 | wdev->netdev, ev->cr.bssid, | |
312 | ev->cr.req_ie, ev->cr.req_ie_len, | |
313 | ev->cr.resp_ie, ev->cr.resp_ie_len, | |
314 | ev->cr.status, | |
df7fc0f9 JB |
315 | ev->cr.status == WLAN_STATUS_SUCCESS, |
316 | NULL); | |
667503dd JB |
317 | break; |
318 | case EVENT_ROAMED: | |
319 | __cfg80211_roamed(wdev, ev->rm.bssid, | |
320 | ev->rm.req_ie, ev->rm.req_ie_len, | |
321 | ev->rm.resp_ie, ev->rm.resp_ie_len); | |
322 | break; | |
323 | case EVENT_DISCONNECTED: | |
324 | __cfg80211_disconnected(wdev->netdev, | |
325 | ev->dc.ie, ev->dc.ie_len, | |
326 | ev->dc.reason, true); | |
327 | break; | |
328 | case EVENT_IBSS_JOINED: | |
329 | __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid); | |
330 | break; | |
331 | } | |
332 | wdev_unlock(wdev); | |
333 | ||
334 | kfree(ev); | |
335 | ||
336 | spin_lock_irqsave(&wdev->event_lock, flags); | |
337 | } | |
338 | spin_unlock_irqrestore(&wdev->event_lock, flags); | |
339 | } | |
340 | ||
341 | static void cfg80211_event_work(struct work_struct *work) | |
342 | { | |
343 | struct cfg80211_registered_device *rdev; | |
344 | struct wireless_dev *wdev; | |
345 | ||
346 | rdev = container_of(work, struct cfg80211_registered_device, | |
347 | event_work); | |
348 | ||
349 | rtnl_lock(); | |
350 | cfg80211_lock_rdev(rdev); | |
351 | mutex_lock(&rdev->devlist_mtx); | |
352 | ||
353 | list_for_each_entry(wdev, &rdev->netdev_list, list) | |
354 | cfg80211_process_events(wdev); | |
355 | ||
356 | mutex_unlock(&rdev->devlist_mtx); | |
357 | cfg80211_unlock_rdev(rdev); | |
358 | rtnl_unlock(); | |
359 | } | |
360 | ||
704232c2 JB |
361 | /* exported functions */ |
362 | ||
3dcf670b | 363 | struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv) |
704232c2 | 364 | { |
638af073 DC |
365 | static int wiphy_counter; |
366 | ||
79c97e97 | 367 | struct cfg80211_registered_device *rdev; |
704232c2 JB |
368 | int alloc_size; |
369 | ||
0b20633d JB |
370 | WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key)); |
371 | WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc)); | |
372 | WARN_ON(ops->connect && !ops->disconnect); | |
373 | WARN_ON(ops->join_ibss && !ops->leave_ibss); | |
374 | WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf); | |
375 | WARN_ON(ops->add_station && !ops->del_station); | |
376 | WARN_ON(ops->add_mpath && !ops->del_mpath); | |
41ade00f | 377 | |
79c97e97 | 378 | alloc_size = sizeof(*rdev) + sizeof_priv; |
704232c2 | 379 | |
79c97e97 JB |
380 | rdev = kzalloc(alloc_size, GFP_KERNEL); |
381 | if (!rdev) | |
704232c2 JB |
382 | return NULL; |
383 | ||
79c97e97 | 384 | rdev->ops = ops; |
704232c2 | 385 | |
a1794390 | 386 | mutex_lock(&cfg80211_mutex); |
704232c2 | 387 | |
79c97e97 | 388 | rdev->wiphy_idx = wiphy_counter++; |
a4d73ee1 | 389 | |
79c97e97 | 390 | if (unlikely(!wiphy_idx_valid(rdev->wiphy_idx))) { |
638af073 | 391 | wiphy_counter--; |
a1794390 | 392 | mutex_unlock(&cfg80211_mutex); |
704232c2 | 393 | /* ugh, wrapped! */ |
79c97e97 | 394 | kfree(rdev); |
704232c2 JB |
395 | return NULL; |
396 | } | |
704232c2 | 397 | |
a1794390 | 398 | mutex_unlock(&cfg80211_mutex); |
638af073 | 399 | |
704232c2 | 400 | /* give it a proper name */ |
79c97e97 JB |
401 | dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx); |
402 | ||
403 | mutex_init(&rdev->mtx); | |
404 | mutex_init(&rdev->devlist_mtx); | |
405 | INIT_LIST_HEAD(&rdev->netdev_list); | |
406 | spin_lock_init(&rdev->bss_lock); | |
407 | INIT_LIST_HEAD(&rdev->bss_list); | |
408 | INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done); | |
409 | ||
410 | device_initialize(&rdev->wiphy.dev); | |
411 | rdev->wiphy.dev.class = &ieee80211_class; | |
412 | rdev->wiphy.dev.platform_data = rdev; | |
413 | ||
463d0183 JB |
414 | wiphy_net_set(&rdev->wiphy, &init_net); |
415 | ||
79c97e97 JB |
416 | rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block; |
417 | rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev), | |
418 | &rdev->wiphy.dev, RFKILL_TYPE_WLAN, | |
419 | &rdev->rfkill_ops, rdev); | |
420 | ||
421 | if (!rdev->rfkill) { | |
422 | kfree(rdev); | |
1f87f7d3 JB |
423 | return NULL; |
424 | } | |
425 | ||
79c97e97 JB |
426 | INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work); |
427 | INIT_WORK(&rdev->conn_work, cfg80211_conn_work); | |
428 | INIT_WORK(&rdev->event_work, cfg80211_event_work); | |
1f87f7d3 | 429 | |
b9a5f8ca JM |
430 | /* |
431 | * Initialize wiphy parameters to IEEE 802.11 MIB default values. | |
432 | * Fragmentation and RTS threshold are disabled by default with the | |
433 | * special -1 value. | |
434 | */ | |
79c97e97 JB |
435 | rdev->wiphy.retry_short = 7; |
436 | rdev->wiphy.retry_long = 4; | |
437 | rdev->wiphy.frag_threshold = (u32) -1; | |
438 | rdev->wiphy.rts_threshold = (u32) -1; | |
b9a5f8ca | 439 | |
79c97e97 | 440 | return &rdev->wiphy; |
704232c2 JB |
441 | } |
442 | EXPORT_SYMBOL(wiphy_new); | |
443 | ||
444 | int wiphy_register(struct wiphy *wiphy) | |
445 | { | |
79c97e97 | 446 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
704232c2 | 447 | int res; |
8318d78a JB |
448 | enum ieee80211_band band; |
449 | struct ieee80211_supported_band *sband; | |
450 | bool have_band = false; | |
451 | int i; | |
f59ac048 LR |
452 | u16 ifmodes = wiphy->interface_modes; |
453 | ||
454 | /* sanity check ifmodes */ | |
455 | WARN_ON(!ifmodes); | |
456 | ifmodes &= ((1 << __NL80211_IFTYPE_AFTER_LAST) - 1) & ~1; | |
457 | if (WARN_ON(ifmodes != wiphy->interface_modes)) | |
458 | wiphy->interface_modes = ifmodes; | |
8318d78a JB |
459 | |
460 | /* sanity check supported bands/channels */ | |
461 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
462 | sband = wiphy->bands[band]; | |
463 | if (!sband) | |
464 | continue; | |
465 | ||
466 | sband->band = band; | |
467 | ||
881d948c JB |
468 | if (WARN_ON(!sband->n_channels || !sband->n_bitrates)) |
469 | return -EINVAL; | |
470 | ||
471 | /* | |
472 | * Since we use a u32 for rate bitmaps in | |
473 | * ieee80211_get_response_rate, we cannot | |
474 | * have more than 32 legacy rates. | |
475 | */ | |
476 | if (WARN_ON(sband->n_bitrates > 32)) | |
8318d78a | 477 | return -EINVAL; |
8318d78a JB |
478 | |
479 | for (i = 0; i < sband->n_channels; i++) { | |
480 | sband->channels[i].orig_flags = | |
481 | sband->channels[i].flags; | |
482 | sband->channels[i].orig_mag = | |
483 | sband->channels[i].max_antenna_gain; | |
484 | sband->channels[i].orig_mpwr = | |
485 | sband->channels[i].max_power; | |
486 | sband->channels[i].band = band; | |
487 | } | |
488 | ||
489 | have_band = true; | |
490 | } | |
491 | ||
492 | if (!have_band) { | |
493 | WARN_ON(1); | |
494 | return -EINVAL; | |
495 | } | |
496 | ||
497 | /* check and set up bitrates */ | |
498 | ieee80211_set_bitrate_flags(wiphy); | |
499 | ||
79c97e97 | 500 | res = device_add(&rdev->wiphy.dev); |
704232c2 | 501 | if (res) |
2f0accc1 | 502 | return res; |
704232c2 | 503 | |
79c97e97 | 504 | res = rfkill_register(rdev->rfkill); |
1f87f7d3 JB |
505 | if (res) |
506 | goto out_rm_dev; | |
507 | ||
2f0accc1 JB |
508 | mutex_lock(&cfg80211_mutex); |
509 | ||
510 | /* set up regulatory info */ | |
511 | wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE); | |
512 | ||
79c97e97 | 513 | list_add(&rdev->list, &cfg80211_rdev_list); |
704232c2 | 514 | |
2f0accc1 JB |
515 | mutex_unlock(&cfg80211_mutex); |
516 | ||
704232c2 | 517 | /* add to debugfs */ |
79c97e97 JB |
518 | rdev->wiphy.debugfsdir = |
519 | debugfs_create_dir(wiphy_name(&rdev->wiphy), | |
704232c2 | 520 | ieee80211_debugfs_dir); |
79c97e97 JB |
521 | if (IS_ERR(rdev->wiphy.debugfsdir)) |
522 | rdev->wiphy.debugfsdir = NULL; | |
704232c2 | 523 | |
73d54c9e LR |
524 | if (wiphy->custom_regulatory) { |
525 | struct regulatory_request request; | |
526 | ||
527 | request.wiphy_idx = get_wiphy_idx(wiphy); | |
528 | request.initiator = NL80211_REGDOM_SET_BY_DRIVER; | |
529 | request.alpha2[0] = '9'; | |
530 | request.alpha2[1] = '9'; | |
531 | ||
532 | nl80211_send_reg_change_event(&request); | |
533 | } | |
534 | ||
79c97e97 | 535 | cfg80211_debugfs_rdev_add(rdev); |
1ac61302 | 536 | |
2f0accc1 | 537 | return 0; |
1f87f7d3 JB |
538 | |
539 | out_rm_dev: | |
79c97e97 | 540 | device_del(&rdev->wiphy.dev); |
704232c2 JB |
541 | return res; |
542 | } | |
543 | EXPORT_SYMBOL(wiphy_register); | |
544 | ||
1f87f7d3 JB |
545 | void wiphy_rfkill_start_polling(struct wiphy *wiphy) |
546 | { | |
79c97e97 | 547 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 548 | |
79c97e97 | 549 | if (!rdev->ops->rfkill_poll) |
1f87f7d3 | 550 | return; |
79c97e97 JB |
551 | rdev->rfkill_ops.poll = cfg80211_rfkill_poll; |
552 | rfkill_resume_polling(rdev->rfkill); | |
1f87f7d3 JB |
553 | } |
554 | EXPORT_SYMBOL(wiphy_rfkill_start_polling); | |
555 | ||
556 | void wiphy_rfkill_stop_polling(struct wiphy *wiphy) | |
557 | { | |
79c97e97 | 558 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 559 | |
79c97e97 | 560 | rfkill_pause_polling(rdev->rfkill); |
1f87f7d3 JB |
561 | } |
562 | EXPORT_SYMBOL(wiphy_rfkill_stop_polling); | |
563 | ||
704232c2 JB |
564 | void wiphy_unregister(struct wiphy *wiphy) |
565 | { | |
79c97e97 | 566 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
704232c2 | 567 | |
79c97e97 | 568 | rfkill_unregister(rdev->rfkill); |
1f87f7d3 | 569 | |
f16bfc1c | 570 | /* protect the device list */ |
a1794390 | 571 | mutex_lock(&cfg80211_mutex); |
704232c2 | 572 | |
79c97e97 | 573 | BUG_ON(!list_empty(&rdev->netdev_list)); |
f16bfc1c JB |
574 | |
575 | /* | |
79c97e97 | 576 | * Try to grab rdev->mtx. If a command is still in progress, |
f16bfc1c JB |
577 | * hopefully the driver will refuse it since it's tearing |
578 | * down the device already. We wait for this command to complete | |
579 | * before unlinking the item from the list. | |
580 | * Note: as codified by the BUG_ON above we cannot get here if | |
581 | * a virtual interface is still associated. Hence, we can only | |
582 | * get to lock contention here if userspace issues a command | |
583 | * that identified the hardware by wiphy index. | |
584 | */ | |
79c97e97 | 585 | mutex_lock(&rdev->mtx); |
f16bfc1c | 586 | /* unlock again before freeing */ |
79c97e97 | 587 | mutex_unlock(&rdev->mtx); |
704232c2 | 588 | |
79c97e97 | 589 | cfg80211_debugfs_rdev_del(rdev); |
1ac61302 | 590 | |
3f2355cb LR |
591 | /* If this device got a regulatory hint tell core its |
592 | * free to listen now to a new shiny device regulatory hint */ | |
593 | reg_device_remove(wiphy); | |
594 | ||
79c97e97 JB |
595 | list_del(&rdev->list); |
596 | device_del(&rdev->wiphy.dev); | |
597 | debugfs_remove(rdev->wiphy.debugfsdir); | |
704232c2 | 598 | |
a1794390 | 599 | mutex_unlock(&cfg80211_mutex); |
6682588a JB |
600 | |
601 | cancel_work_sync(&rdev->conn_work); | |
602 | cancel_work_sync(&rdev->scan_done_wk); | |
603 | kfree(rdev->scan_req); | |
604 | flush_work(&rdev->event_work); | |
704232c2 JB |
605 | } |
606 | EXPORT_SYMBOL(wiphy_unregister); | |
607 | ||
79c97e97 | 608 | void cfg80211_dev_free(struct cfg80211_registered_device *rdev) |
704232c2 | 609 | { |
2a519311 | 610 | struct cfg80211_internal_bss *scan, *tmp; |
79c97e97 JB |
611 | rfkill_destroy(rdev->rfkill); |
612 | mutex_destroy(&rdev->mtx); | |
613 | mutex_destroy(&rdev->devlist_mtx); | |
614 | list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list) | |
78c1c7e1 | 615 | cfg80211_put_bss(&scan->pub); |
79c97e97 | 616 | kfree(rdev); |
704232c2 JB |
617 | } |
618 | ||
619 | void wiphy_free(struct wiphy *wiphy) | |
620 | { | |
621 | put_device(&wiphy->dev); | |
622 | } | |
623 | EXPORT_SYMBOL(wiphy_free); | |
624 | ||
1f87f7d3 JB |
625 | void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked) |
626 | { | |
79c97e97 | 627 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 628 | |
79c97e97 JB |
629 | if (rfkill_set_hw_state(rdev->rfkill, blocked)) |
630 | schedule_work(&rdev->rfkill_sync); | |
1f87f7d3 JB |
631 | } |
632 | EXPORT_SYMBOL(wiphy_rfkill_set_hw_state); | |
633 | ||
704232c2 JB |
634 | static int cfg80211_netdev_notifier_call(struct notifier_block * nb, |
635 | unsigned long state, | |
636 | void *ndev) | |
637 | { | |
638 | struct net_device *dev = ndev; | |
2a783c13 | 639 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
704232c2 JB |
640 | struct cfg80211_registered_device *rdev; |
641 | ||
2a783c13 | 642 | if (!wdev) |
1f87f7d3 | 643 | return NOTIFY_DONE; |
704232c2 | 644 | |
2a783c13 | 645 | rdev = wiphy_to_dev(wdev->wiphy); |
704232c2 | 646 | |
2a783c13 | 647 | WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); |
60719ffd | 648 | |
704232c2 JB |
649 | switch (state) { |
650 | case NETDEV_REGISTER: | |
667503dd JB |
651 | mutex_init(&wdev->mtx); |
652 | INIT_LIST_HEAD(&wdev->event_list); | |
653 | spin_lock_init(&wdev->event_lock); | |
704232c2 | 654 | mutex_lock(&rdev->devlist_mtx); |
2a783c13 | 655 | list_add(&wdev->list, &rdev->netdev_list); |
463d0183 JB |
656 | /* can only change netns with wiphy */ |
657 | dev->features |= NETIF_F_NETNS_LOCAL; | |
658 | ||
704232c2 JB |
659 | if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj, |
660 | "phy80211")) { | |
661 | printk(KERN_ERR "wireless: failed to add phy80211 " | |
662 | "symlink to netdev!\n"); | |
663 | } | |
2a783c13 | 664 | wdev->netdev = dev; |
b23aa676 | 665 | wdev->sme_state = CFG80211_SME_IDLE; |
bc92afd9 | 666 | mutex_unlock(&rdev->devlist_mtx); |
08645126 | 667 | #ifdef CONFIG_WIRELESS_EXT |
a9a11622 JB |
668 | if (!dev->wireless_handlers) |
669 | dev->wireless_handlers = &cfg80211_wext_handler; | |
2a783c13 JB |
670 | wdev->wext.default_key = -1; |
671 | wdev->wext.default_mgmt_key = -1; | |
f2129354 | 672 | wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; |
bc92afd9 | 673 | wdev->wext.ps = CONFIG_CFG80211_DEFAULT_PS_VALUE; |
75e6c3b7 | 674 | wdev->wext.ps_timeout = 100; |
bc92afd9 JB |
675 | if (rdev->ops->set_power_mgmt) |
676 | if (rdev->ops->set_power_mgmt(wdev->wiphy, dev, | |
677 | wdev->wext.ps, | |
678 | wdev->wext.ps_timeout)) { | |
679 | /* assume this means it's off */ | |
680 | wdev->wext.ps = false; | |
681 | } | |
08645126 | 682 | #endif |
704232c2 | 683 | break; |
04a773ad | 684 | case NETDEV_GOING_DOWN: |
b23aa676 SO |
685 | switch (wdev->iftype) { |
686 | case NL80211_IFTYPE_ADHOC: | |
687 | cfg80211_leave_ibss(rdev, dev, true); | |
688 | break; | |
689 | case NL80211_IFTYPE_STATION: | |
667503dd | 690 | wdev_lock(wdev); |
f2129354 JB |
691 | #ifdef CONFIG_WIRELESS_EXT |
692 | kfree(wdev->wext.ie); | |
693 | wdev->wext.ie = NULL; | |
694 | wdev->wext.ie_len = 0; | |
0eb14647 | 695 | wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; |
f2129354 | 696 | #endif |
667503dd JB |
697 | __cfg80211_disconnect(rdev, dev, |
698 | WLAN_REASON_DEAUTH_LEAVING, true); | |
19957bb3 | 699 | cfg80211_mlme_down(rdev, dev); |
667503dd | 700 | wdev_unlock(wdev); |
b23aa676 SO |
701 | break; |
702 | default: | |
703 | break; | |
704 | } | |
04a773ad JB |
705 | break; |
706 | case NETDEV_UP: | |
707 | #ifdef CONFIG_WIRELESS_EXT | |
667503dd JB |
708 | cfg80211_lock_rdev(rdev); |
709 | wdev_lock(wdev); | |
f2129354 JB |
710 | switch (wdev->iftype) { |
711 | case NL80211_IFTYPE_ADHOC: | |
fffd0934 | 712 | cfg80211_ibss_wext_join(rdev, wdev); |
04a773ad | 713 | break; |
f2129354 | 714 | case NL80211_IFTYPE_STATION: |
fffd0934 | 715 | cfg80211_mgd_wext_connect(rdev, wdev); |
f2129354 JB |
716 | break; |
717 | default: | |
04a773ad | 718 | break; |
f2129354 | 719 | } |
667503dd JB |
720 | wdev_unlock(wdev); |
721 | cfg80211_unlock_rdev(rdev); | |
04a773ad | 722 | #endif |
2a783c13 | 723 | break; |
704232c2 JB |
724 | case NETDEV_UNREGISTER: |
725 | mutex_lock(&rdev->devlist_mtx); | |
e40cbdac JB |
726 | /* |
727 | * It is possible to get NETDEV_UNREGISTER | |
728 | * multiple times. To detect that, check | |
729 | * that the interface is still on the list | |
730 | * of registered interfaces, and only then | |
731 | * remove and clean it up. | |
732 | */ | |
2a783c13 | 733 | if (!list_empty(&wdev->list)) { |
704232c2 | 734 | sysfs_remove_link(&dev->dev.kobj, "phy80211"); |
2a783c13 | 735 | list_del_init(&wdev->list); |
e40cbdac | 736 | mutex_destroy(&wdev->mtx); |
fffd0934 | 737 | #ifdef CONFIG_WIRELESS_EXT |
e40cbdac | 738 | kfree(wdev->wext.keys); |
fffd0934 | 739 | #endif |
e40cbdac JB |
740 | } |
741 | mutex_unlock(&rdev->devlist_mtx); | |
704232c2 | 742 | break; |
1f87f7d3 | 743 | case NETDEV_PRE_UP: |
0b20633d JB |
744 | if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype))) |
745 | return notifier_from_errno(-EOPNOTSUPP); | |
1f87f7d3 JB |
746 | if (rfkill_blocked(rdev->rfkill)) |
747 | return notifier_from_errno(-ERFKILL); | |
748 | break; | |
704232c2 JB |
749 | } |
750 | ||
1f87f7d3 | 751 | return NOTIFY_DONE; |
704232c2 JB |
752 | } |
753 | ||
754 | static struct notifier_block cfg80211_netdev_notifier = { | |
755 | .notifier_call = cfg80211_netdev_notifier_call, | |
756 | }; | |
757 | ||
463d0183 JB |
758 | static void __net_exit cfg80211_pernet_exit(struct net *net) |
759 | { | |
760 | struct cfg80211_registered_device *rdev; | |
761 | ||
762 | rtnl_lock(); | |
763 | mutex_lock(&cfg80211_mutex); | |
764 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
765 | if (net_eq(wiphy_net(&rdev->wiphy), net)) | |
766 | WARN_ON(cfg80211_switch_netns(rdev, &init_net)); | |
767 | } | |
768 | mutex_unlock(&cfg80211_mutex); | |
769 | rtnl_unlock(); | |
770 | } | |
771 | ||
772 | static struct pernet_operations cfg80211_pernet_ops = { | |
773 | .exit = cfg80211_pernet_exit, | |
774 | }; | |
775 | ||
776 | static int __init cfg80211_init(void) | |
704232c2 | 777 | { |
b2e1b302 LR |
778 | int err; |
779 | ||
463d0183 JB |
780 | err = register_pernet_device(&cfg80211_pernet_ops); |
781 | if (err) | |
782 | goto out_fail_pernet; | |
783 | ||
b2e1b302 | 784 | err = wiphy_sysfs_init(); |
704232c2 JB |
785 | if (err) |
786 | goto out_fail_sysfs; | |
787 | ||
788 | err = register_netdevice_notifier(&cfg80211_netdev_notifier); | |
789 | if (err) | |
790 | goto out_fail_notifier; | |
791 | ||
55682965 JB |
792 | err = nl80211_init(); |
793 | if (err) | |
794 | goto out_fail_nl80211; | |
795 | ||
704232c2 JB |
796 | ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); |
797 | ||
b2e1b302 LR |
798 | err = regulatory_init(); |
799 | if (err) | |
800 | goto out_fail_reg; | |
801 | ||
704232c2 JB |
802 | return 0; |
803 | ||
b2e1b302 LR |
804 | out_fail_reg: |
805 | debugfs_remove(ieee80211_debugfs_dir); | |
55682965 JB |
806 | out_fail_nl80211: |
807 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); | |
704232c2 JB |
808 | out_fail_notifier: |
809 | wiphy_sysfs_exit(); | |
810 | out_fail_sysfs: | |
463d0183 JB |
811 | unregister_pernet_device(&cfg80211_pernet_ops); |
812 | out_fail_pernet: | |
704232c2 JB |
813 | return err; |
814 | } | |
3a462465 | 815 | subsys_initcall(cfg80211_init); |
704232c2 JB |
816 | |
817 | static void cfg80211_exit(void) | |
818 | { | |
819 | debugfs_remove(ieee80211_debugfs_dir); | |
55682965 | 820 | nl80211_exit(); |
704232c2 JB |
821 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); |
822 | wiphy_sysfs_exit(); | |
b2e1b302 | 823 | regulatory_exit(); |
463d0183 | 824 | unregister_pernet_device(&cfg80211_pernet_ops); |
704232c2 JB |
825 | } |
826 | module_exit(cfg80211_exit); |