Commit | Line | Data |
---|---|---|
704232c2 JB |
1 | /* |
2 | * This is the linux wireless configuration interface. | |
3 | * | |
5f2aa25e | 4 | * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net> |
704232c2 JB |
5 | */ |
6 | ||
e9c0268f JP |
7 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
8 | ||
704232c2 JB |
9 | #include <linux/if.h> |
10 | #include <linux/module.h> | |
11 | #include <linux/err.h> | |
704232c2 | 12 | #include <linux/list.h> |
5a0e3ad6 | 13 | #include <linux/slab.h> |
704232c2 JB |
14 | #include <linux/nl80211.h> |
15 | #include <linux/debugfs.h> | |
16 | #include <linux/notifier.h> | |
17 | #include <linux/device.h> | |
16a832e7 | 18 | #include <linux/etherdevice.h> |
1f87f7d3 | 19 | #include <linux/rtnetlink.h> |
d43c36dc | 20 | #include <linux/sched.h> |
704232c2 JB |
21 | #include <net/genetlink.h> |
22 | #include <net/cfg80211.h> | |
55682965 | 23 | #include "nl80211.h" |
704232c2 JB |
24 | #include "core.h" |
25 | #include "sysfs.h" | |
1ac61302 | 26 | #include "debugfs.h" |
a9a11622 | 27 | #include "wext-compat.h" |
4890e3be | 28 | #include "ethtool.h" |
704232c2 JB |
29 | |
30 | /* name for sysfs, %d is appended */ | |
31 | #define PHY_NAME "phy" | |
32 | ||
33 | MODULE_AUTHOR("Johannes Berg"); | |
34 | MODULE_LICENSE("GPL"); | |
35 | MODULE_DESCRIPTION("wireless configuration support"); | |
36 | ||
5f2aa25e | 37 | /* RCU-protected (and cfg80211_mutex for writers) */ |
79c97e97 | 38 | LIST_HEAD(cfg80211_rdev_list); |
f5ea9120 | 39 | int cfg80211_rdev_list_generation; |
a1794390 | 40 | |
a1794390 | 41 | DEFINE_MUTEX(cfg80211_mutex); |
704232c2 JB |
42 | |
43 | /* for debugfs */ | |
44 | static struct dentry *ieee80211_debugfs_dir; | |
45 | ||
e60d7443 AB |
46 | /* for the cleanup, scan and event works */ |
47 | struct workqueue_struct *cfg80211_wq; | |
48 | ||
40db6c77 AK |
49 | static bool cfg80211_disable_40mhz_24ghz; |
50 | module_param(cfg80211_disable_40mhz_24ghz, bool, 0644); | |
51 | MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz, | |
52 | "Disable 40MHz support in the 2.4GHz band"); | |
53 | ||
806a9e39 | 54 | /* requires cfg80211_mutex to be held! */ |
79c97e97 | 55 | struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx) |
55682965 | 56 | { |
79c97e97 | 57 | struct cfg80211_registered_device *result = NULL, *rdev; |
55682965 | 58 | |
85fd129a LR |
59 | if (!wiphy_idx_valid(wiphy_idx)) |
60 | return NULL; | |
61 | ||
761cf7ec LR |
62 | assert_cfg80211_lock(); |
63 | ||
79c97e97 JB |
64 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
65 | if (rdev->wiphy_idx == wiphy_idx) { | |
66 | result = rdev; | |
55682965 JB |
67 | break; |
68 | } | |
69 | } | |
70 | ||
71 | return result; | |
72 | } | |
73 | ||
806a9e39 LR |
74 | int get_wiphy_idx(struct wiphy *wiphy) |
75 | { | |
79c97e97 | 76 | struct cfg80211_registered_device *rdev; |
806a9e39 LR |
77 | if (!wiphy) |
78 | return WIPHY_IDX_STALE; | |
79c97e97 JB |
79 | rdev = wiphy_to_dev(wiphy); |
80 | return rdev->wiphy_idx; | |
806a9e39 LR |
81 | } |
82 | ||
79c97e97 | 83 | /* requires cfg80211_rdev_mutex to be held! */ |
806a9e39 LR |
84 | struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx) |
85 | { | |
79c97e97 | 86 | struct cfg80211_registered_device *rdev; |
806a9e39 LR |
87 | |
88 | if (!wiphy_idx_valid(wiphy_idx)) | |
89 | return NULL; | |
90 | ||
91 | assert_cfg80211_lock(); | |
92 | ||
79c97e97 JB |
93 | rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx); |
94 | if (!rdev) | |
806a9e39 | 95 | return NULL; |
79c97e97 | 96 | return &rdev->wiphy; |
806a9e39 LR |
97 | } |
98 | ||
55682965 | 99 | struct cfg80211_registered_device * |
463d0183 | 100 | cfg80211_get_dev_from_ifindex(struct net *net, int ifindex) |
55682965 | 101 | { |
79c97e97 | 102 | struct cfg80211_registered_device *rdev = ERR_PTR(-ENODEV); |
55682965 JB |
103 | struct net_device *dev; |
104 | ||
a1794390 | 105 | mutex_lock(&cfg80211_mutex); |
463d0183 | 106 | dev = dev_get_by_index(net, ifindex); |
55682965 JB |
107 | if (!dev) |
108 | goto out; | |
109 | if (dev->ieee80211_ptr) { | |
79c97e97 JB |
110 | rdev = wiphy_to_dev(dev->ieee80211_ptr->wiphy); |
111 | mutex_lock(&rdev->mtx); | |
55682965 | 112 | } else |
79c97e97 | 113 | rdev = ERR_PTR(-ENODEV); |
55682965 JB |
114 | dev_put(dev); |
115 | out: | |
a1794390 | 116 | mutex_unlock(&cfg80211_mutex); |
79c97e97 | 117 | return rdev; |
55682965 JB |
118 | } |
119 | ||
4bbf4d56 | 120 | /* requires cfg80211_mutex to be held */ |
55682965 JB |
121 | int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, |
122 | char *newname) | |
123 | { | |
79c97e97 | 124 | struct cfg80211_registered_device *rdev2; |
7623225f | 125 | int wiphy_idx, taken = -1, result, digits; |
55682965 | 126 | |
4bbf4d56 | 127 | assert_cfg80211_lock(); |
2940bb69 | 128 | |
7623225f JB |
129 | /* prohibit calling the thing phy%d when %d is not its number */ |
130 | sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken); | |
131 | if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) { | |
132 | /* count number of places needed to print wiphy_idx */ | |
133 | digits = 1; | |
134 | while (wiphy_idx /= 10) | |
135 | digits++; | |
136 | /* | |
137 | * deny the name if it is phy<idx> where <idx> is printed | |
138 | * without leading zeroes. taken == strlen(newname) here | |
139 | */ | |
140 | if (taken == strlen(PHY_NAME) + digits) | |
141 | return -EINVAL; | |
142 | } | |
143 | ||
144 | ||
2940bb69 | 145 | /* Ignore nop renames */ |
2940bb69 | 146 | if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0) |
4bbf4d56 | 147 | return 0; |
2940bb69 EB |
148 | |
149 | /* Ensure another device does not already have this name. */ | |
79c97e97 JB |
150 | list_for_each_entry(rdev2, &cfg80211_rdev_list, list) |
151 | if (strcmp(newname, dev_name(&rdev2->wiphy.dev)) == 0) | |
7623225f | 152 | return -EINVAL; |
55682965 | 153 | |
55682965 JB |
154 | result = device_rename(&rdev->wiphy.dev, newname); |
155 | if (result) | |
4bbf4d56 | 156 | return result; |
55682965 | 157 | |
33c0360b JB |
158 | if (rdev->wiphy.debugfsdir && |
159 | !debugfs_rename(rdev->wiphy.debugfsdir->d_parent, | |
55682965 JB |
160 | rdev->wiphy.debugfsdir, |
161 | rdev->wiphy.debugfsdir->d_parent, | |
162 | newname)) | |
e9c0268f | 163 | pr_err("failed to rename debugfs dir to %s!\n", newname); |
55682965 | 164 | |
4bbf4d56 | 165 | nl80211_notify_dev_rename(rdev); |
55682965 | 166 | |
4bbf4d56 | 167 | return 0; |
55682965 JB |
168 | } |
169 | ||
463d0183 JB |
170 | int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, |
171 | struct net *net) | |
172 | { | |
173 | struct wireless_dev *wdev; | |
174 | int err = 0; | |
175 | ||
5be83de5 | 176 | if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK)) |
463d0183 JB |
177 | return -EOPNOTSUPP; |
178 | ||
89a54e48 | 179 | list_for_each_entry(wdev, &rdev->wdev_list, list) { |
ba22fb5b JB |
180 | if (!wdev->netdev) |
181 | continue; | |
463d0183 JB |
182 | wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; |
183 | err = dev_change_net_namespace(wdev->netdev, net, "wlan%d"); | |
184 | if (err) | |
185 | break; | |
186 | wdev->netdev->features |= NETIF_F_NETNS_LOCAL; | |
187 | } | |
188 | ||
189 | if (err) { | |
190 | /* failed -- clean up to old netns */ | |
191 | net = wiphy_net(&rdev->wiphy); | |
192 | ||
89a54e48 | 193 | list_for_each_entry_continue_reverse(wdev, &rdev->wdev_list, |
463d0183 | 194 | list) { |
ba22fb5b JB |
195 | if (!wdev->netdev) |
196 | continue; | |
463d0183 JB |
197 | wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; |
198 | err = dev_change_net_namespace(wdev->netdev, net, | |
199 | "wlan%d"); | |
200 | WARN_ON(err); | |
201 | wdev->netdev->features |= NETIF_F_NETNS_LOCAL; | |
202 | } | |
04600794 JB |
203 | |
204 | return err; | |
463d0183 JB |
205 | } |
206 | ||
207 | wiphy_net_set(&rdev->wiphy, net); | |
208 | ||
04600794 JB |
209 | err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev)); |
210 | WARN_ON(err); | |
211 | ||
212 | return 0; | |
463d0183 JB |
213 | } |
214 | ||
1f87f7d3 JB |
215 | static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data) |
216 | { | |
79c97e97 | 217 | struct cfg80211_registered_device *rdev = data; |
1f87f7d3 | 218 | |
79c97e97 | 219 | rdev->ops->rfkill_poll(&rdev->wiphy); |
1f87f7d3 JB |
220 | } |
221 | ||
222 | static int cfg80211_rfkill_set_block(void *data, bool blocked) | |
223 | { | |
79c97e97 | 224 | struct cfg80211_registered_device *rdev = data; |
1f87f7d3 JB |
225 | struct wireless_dev *wdev; |
226 | ||
227 | if (!blocked) | |
228 | return 0; | |
229 | ||
230 | rtnl_lock(); | |
79c97e97 | 231 | mutex_lock(&rdev->devlist_mtx); |
1f87f7d3 | 232 | |
98104fde JB |
233 | list_for_each_entry(wdev, &rdev->wdev_list, list) { |
234 | if (wdev->netdev) { | |
ba22fb5b | 235 | dev_close(wdev->netdev); |
98104fde JB |
236 | continue; |
237 | } | |
238 | /* otherwise, check iftype */ | |
239 | switch (wdev->iftype) { | |
240 | case NL80211_IFTYPE_P2P_DEVICE: | |
241 | if (!wdev->p2p_started) | |
242 | break; | |
243 | rdev->ops->stop_p2p_device(&rdev->wiphy, wdev); | |
244 | wdev->p2p_started = false; | |
245 | rdev->opencount--; | |
246 | break; | |
247 | default: | |
248 | break; | |
249 | } | |
250 | } | |
1f87f7d3 | 251 | |
79c97e97 | 252 | mutex_unlock(&rdev->devlist_mtx); |
1f87f7d3 JB |
253 | rtnl_unlock(); |
254 | ||
255 | return 0; | |
256 | } | |
257 | ||
258 | static void cfg80211_rfkill_sync_work(struct work_struct *work) | |
259 | { | |
79c97e97 | 260 | struct cfg80211_registered_device *rdev; |
1f87f7d3 | 261 | |
79c97e97 JB |
262 | rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync); |
263 | cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill)); | |
1f87f7d3 JB |
264 | } |
265 | ||
667503dd JB |
266 | static void cfg80211_event_work(struct work_struct *work) |
267 | { | |
268 | struct cfg80211_registered_device *rdev; | |
667503dd JB |
269 | |
270 | rdev = container_of(work, struct cfg80211_registered_device, | |
271 | event_work); | |
272 | ||
273 | rtnl_lock(); | |
274 | cfg80211_lock_rdev(rdev); | |
667503dd | 275 | |
3d54d255 | 276 | cfg80211_process_rdev_events(rdev); |
667503dd JB |
277 | cfg80211_unlock_rdev(rdev); |
278 | rtnl_unlock(); | |
279 | } | |
280 | ||
704232c2 JB |
281 | /* exported functions */ |
282 | ||
3dcf670b | 283 | struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv) |
704232c2 | 284 | { |
638af073 | 285 | static int wiphy_counter; |
7623225f JB |
286 | |
287 | struct cfg80211_registered_device *rdev; | |
704232c2 JB |
288 | int alloc_size; |
289 | ||
0b20633d JB |
290 | WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key)); |
291 | WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc)); | |
292 | WARN_ON(ops->connect && !ops->disconnect); | |
293 | WARN_ON(ops->join_ibss && !ops->leave_ibss); | |
294 | WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf); | |
295 | WARN_ON(ops->add_station && !ops->del_station); | |
296 | WARN_ON(ops->add_mpath && !ops->del_mpath); | |
29cbe68c | 297 | WARN_ON(ops->join_mesh && !ops->leave_mesh); |
41ade00f | 298 | |
79c97e97 | 299 | alloc_size = sizeof(*rdev) + sizeof_priv; |
704232c2 | 300 | |
79c97e97 JB |
301 | rdev = kzalloc(alloc_size, GFP_KERNEL); |
302 | if (!rdev) | |
704232c2 JB |
303 | return NULL; |
304 | ||
79c97e97 | 305 | rdev->ops = ops; |
704232c2 | 306 | |
a1794390 | 307 | mutex_lock(&cfg80211_mutex); |
704232c2 | 308 | |
79c97e97 | 309 | rdev->wiphy_idx = wiphy_counter++; |
a4d73ee1 | 310 | |
79c97e97 | 311 | if (unlikely(!wiphy_idx_valid(rdev->wiphy_idx))) { |
638af073 | 312 | wiphy_counter--; |
a1794390 | 313 | mutex_unlock(&cfg80211_mutex); |
7623225f | 314 | /* ugh, wrapped! */ |
79c97e97 | 315 | kfree(rdev); |
704232c2 JB |
316 | return NULL; |
317 | } | |
704232c2 | 318 | |
5a254ffe | 319 | mutex_unlock(&cfg80211_mutex); |
79c97e97 | 320 | |
7623225f JB |
321 | /* give it a proper name */ |
322 | dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx); | |
323 | ||
79c97e97 JB |
324 | mutex_init(&rdev->mtx); |
325 | mutex_init(&rdev->devlist_mtx); | |
c10841ca | 326 | mutex_init(&rdev->sched_scan_mtx); |
89a54e48 | 327 | INIT_LIST_HEAD(&rdev->wdev_list); |
79c97e97 JB |
328 | spin_lock_init(&rdev->bss_lock); |
329 | INIT_LIST_HEAD(&rdev->bss_list); | |
330 | INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done); | |
807f8a8c | 331 | INIT_WORK(&rdev->sched_scan_results_wk, __cfg80211_sched_scan_results); |
3d23e349 JB |
332 | #ifdef CONFIG_CFG80211_WEXT |
333 | rdev->wiphy.wext = &cfg80211_wext_handler; | |
334 | #endif | |
335 | ||
79c97e97 JB |
336 | device_initialize(&rdev->wiphy.dev); |
337 | rdev->wiphy.dev.class = &ieee80211_class; | |
338 | rdev->wiphy.dev.platform_data = rdev; | |
339 | ||
5be83de5 JB |
340 | #ifdef CONFIG_CFG80211_DEFAULT_PS |
341 | rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; | |
342 | #endif | |
16cb9d42 | 343 | |
463d0183 JB |
344 | wiphy_net_set(&rdev->wiphy, &init_net); |
345 | ||
79c97e97 JB |
346 | rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block; |
347 | rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev), | |
348 | &rdev->wiphy.dev, RFKILL_TYPE_WLAN, | |
349 | &rdev->rfkill_ops, rdev); | |
350 | ||
351 | if (!rdev->rfkill) { | |
352 | kfree(rdev); | |
1f87f7d3 JB |
353 | return NULL; |
354 | } | |
355 | ||
79c97e97 JB |
356 | INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work); |
357 | INIT_WORK(&rdev->conn_work, cfg80211_conn_work); | |
358 | INIT_WORK(&rdev->event_work, cfg80211_event_work); | |
1f87f7d3 | 359 | |
ad002395 JB |
360 | init_waitqueue_head(&rdev->dev_wait); |
361 | ||
b9a5f8ca JM |
362 | /* |
363 | * Initialize wiphy parameters to IEEE 802.11 MIB default values. | |
364 | * Fragmentation and RTS threshold are disabled by default with the | |
365 | * special -1 value. | |
366 | */ | |
79c97e97 JB |
367 | rdev->wiphy.retry_short = 7; |
368 | rdev->wiphy.retry_long = 4; | |
369 | rdev->wiphy.frag_threshold = (u32) -1; | |
370 | rdev->wiphy.rts_threshold = (u32) -1; | |
81077e82 | 371 | rdev->wiphy.coverage_class = 0; |
b9a5f8ca | 372 | |
79c97e97 | 373 | return &rdev->wiphy; |
704232c2 JB |
374 | } |
375 | EXPORT_SYMBOL(wiphy_new); | |
376 | ||
7527a782 JB |
377 | static int wiphy_verify_combinations(struct wiphy *wiphy) |
378 | { | |
379 | const struct ieee80211_iface_combination *c; | |
380 | int i, j; | |
381 | ||
7527a782 JB |
382 | for (i = 0; i < wiphy->n_iface_combinations; i++) { |
383 | u32 cnt = 0; | |
384 | u16 all_iftypes = 0; | |
385 | ||
386 | c = &wiphy->iface_combinations[i]; | |
387 | ||
388 | /* Combinations with just one interface aren't real */ | |
389 | if (WARN_ON(c->max_interfaces < 2)) | |
390 | return -EINVAL; | |
391 | ||
392 | /* Need at least one channel */ | |
393 | if (WARN_ON(!c->num_different_channels)) | |
394 | return -EINVAL; | |
395 | ||
d4e50c59 MK |
396 | /* |
397 | * Put a sane limit on maximum number of different | |
398 | * channels to simplify channel accounting code. | |
399 | */ | |
400 | if (WARN_ON(c->num_different_channels > | |
401 | CFG80211_MAX_NUM_DIFFERENT_CHANNELS)) | |
402 | return -EINVAL; | |
403 | ||
7527a782 JB |
404 | if (WARN_ON(!c->n_limits)) |
405 | return -EINVAL; | |
406 | ||
407 | for (j = 0; j < c->n_limits; j++) { | |
408 | u16 types = c->limits[j].types; | |
409 | ||
410 | /* | |
411 | * interface types shouldn't overlap, this is | |
412 | * used in cfg80211_can_change_interface() | |
413 | */ | |
414 | if (WARN_ON(types & all_iftypes)) | |
415 | return -EINVAL; | |
416 | all_iftypes |= types; | |
417 | ||
418 | if (WARN_ON(!c->limits[j].max)) | |
419 | return -EINVAL; | |
420 | ||
421 | /* Shouldn't list software iftypes in combinations! */ | |
422 | if (WARN_ON(wiphy->software_iftypes & types)) | |
423 | return -EINVAL; | |
424 | ||
98104fde JB |
425 | /* Only a single P2P_DEVICE can be allowed */ |
426 | if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) && | |
427 | c->limits[j].max > 1)) | |
428 | return -EINVAL; | |
429 | ||
7527a782 JB |
430 | cnt += c->limits[j].max; |
431 | /* | |
432 | * Don't advertise an unsupported type | |
433 | * in a combination. | |
434 | */ | |
435 | if (WARN_ON((wiphy->interface_modes & types) != types)) | |
436 | return -EINVAL; | |
437 | } | |
438 | ||
439 | /* You can't even choose that many! */ | |
440 | if (WARN_ON(cnt < c->max_interfaces)) | |
441 | return -EINVAL; | |
442 | } | |
443 | ||
444 | return 0; | |
445 | } | |
446 | ||
704232c2 JB |
447 | int wiphy_register(struct wiphy *wiphy) |
448 | { | |
79c97e97 | 449 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
704232c2 | 450 | int res; |
8318d78a JB |
451 | enum ieee80211_band band; |
452 | struct ieee80211_supported_band *sband; | |
453 | bool have_band = false; | |
454 | int i; | |
f59ac048 LR |
455 | u16 ifmodes = wiphy->interface_modes; |
456 | ||
dfb89c56 | 457 | #ifdef CONFIG_PM |
77dbbb13 JB |
458 | if (WARN_ON((wiphy->wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) && |
459 | !(wiphy->wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY))) | |
460 | return -EINVAL; | |
dfb89c56 | 461 | #endif |
77dbbb13 | 462 | |
562a7480 JB |
463 | if (WARN_ON(wiphy->ap_sme_capa && |
464 | !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME))) | |
465 | return -EINVAL; | |
466 | ||
ef15aac6 JB |
467 | if (WARN_ON(wiphy->addresses && !wiphy->n_addresses)) |
468 | return -EINVAL; | |
469 | ||
470 | if (WARN_ON(wiphy->addresses && | |
471 | !is_zero_ether_addr(wiphy->perm_addr) && | |
472 | memcmp(wiphy->perm_addr, wiphy->addresses[0].addr, | |
473 | ETH_ALEN))) | |
474 | return -EINVAL; | |
475 | ||
476 | if (wiphy->addresses) | |
477 | memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN); | |
478 | ||
f59ac048 LR |
479 | /* sanity check ifmodes */ |
480 | WARN_ON(!ifmodes); | |
2e161f78 | 481 | ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1; |
f59ac048 LR |
482 | if (WARN_ON(ifmodes != wiphy->interface_modes)) |
483 | wiphy->interface_modes = ifmodes; | |
8318d78a | 484 | |
7527a782 JB |
485 | res = wiphy_verify_combinations(wiphy); |
486 | if (res) | |
487 | return res; | |
488 | ||
8318d78a JB |
489 | /* sanity check supported bands/channels */ |
490 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
491 | sband = wiphy->bands[band]; | |
492 | if (!sband) | |
493 | continue; | |
494 | ||
495 | sband->band = band; | |
3a0c52a6 VK |
496 | if (WARN_ON(!sband->n_channels)) |
497 | return -EINVAL; | |
498 | /* | |
499 | * on 60gHz band, there are no legacy rates, so | |
500 | * n_bitrates is 0 | |
501 | */ | |
502 | if (WARN_ON(band != IEEE80211_BAND_60GHZ && | |
503 | !sband->n_bitrates)) | |
881d948c JB |
504 | return -EINVAL; |
505 | ||
40db6c77 AK |
506 | /* |
507 | * Since cfg80211_disable_40mhz_24ghz is global, we can | |
508 | * modify the sband's ht data even if the driver uses a | |
509 | * global structure for that. | |
510 | */ | |
511 | if (cfg80211_disable_40mhz_24ghz && | |
512 | band == IEEE80211_BAND_2GHZ && | |
513 | sband->ht_cap.ht_supported) { | |
514 | sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
515 | sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40; | |
516 | } | |
517 | ||
881d948c JB |
518 | /* |
519 | * Since we use a u32 for rate bitmaps in | |
520 | * ieee80211_get_response_rate, we cannot | |
521 | * have more than 32 legacy rates. | |
522 | */ | |
523 | if (WARN_ON(sband->n_bitrates > 32)) | |
8318d78a | 524 | return -EINVAL; |
8318d78a JB |
525 | |
526 | for (i = 0; i < sband->n_channels; i++) { | |
527 | sband->channels[i].orig_flags = | |
528 | sband->channels[i].flags; | |
529 | sband->channels[i].orig_mag = | |
530 | sband->channels[i].max_antenna_gain; | |
531 | sband->channels[i].orig_mpwr = | |
532 | sband->channels[i].max_power; | |
533 | sband->channels[i].band = band; | |
534 | } | |
535 | ||
536 | have_band = true; | |
537 | } | |
538 | ||
539 | if (!have_band) { | |
540 | WARN_ON(1); | |
541 | return -EINVAL; | |
542 | } | |
543 | ||
dfb89c56 | 544 | #ifdef CONFIG_PM |
ff1b6e69 JB |
545 | if (rdev->wiphy.wowlan.n_patterns) { |
546 | if (WARN_ON(!rdev->wiphy.wowlan.pattern_min_len || | |
547 | rdev->wiphy.wowlan.pattern_min_len > | |
548 | rdev->wiphy.wowlan.pattern_max_len)) | |
549 | return -EINVAL; | |
550 | } | |
dfb89c56 | 551 | #endif |
ff1b6e69 | 552 | |
8318d78a JB |
553 | /* check and set up bitrates */ |
554 | ieee80211_set_bitrate_flags(wiphy); | |
555 | ||
5a652052 MB |
556 | mutex_lock(&cfg80211_mutex); |
557 | ||
79c97e97 | 558 | res = device_add(&rdev->wiphy.dev); |
c3d34d5d JL |
559 | if (res) { |
560 | mutex_unlock(&cfg80211_mutex); | |
561 | return res; | |
562 | } | |
1f87f7d3 | 563 | |
2f0accc1 | 564 | /* set up regulatory info */ |
57b5ce07 | 565 | wiphy_regulatory_register(wiphy); |
2f0accc1 | 566 | |
5f2aa25e | 567 | list_add_rcu(&rdev->list, &cfg80211_rdev_list); |
f5ea9120 | 568 | cfg80211_rdev_list_generation++; |
704232c2 JB |
569 | |
570 | /* add to debugfs */ | |
79c97e97 JB |
571 | rdev->wiphy.debugfsdir = |
572 | debugfs_create_dir(wiphy_name(&rdev->wiphy), | |
704232c2 | 573 | ieee80211_debugfs_dir); |
79c97e97 JB |
574 | if (IS_ERR(rdev->wiphy.debugfsdir)) |
575 | rdev->wiphy.debugfsdir = NULL; | |
704232c2 | 576 | |
5be83de5 | 577 | if (wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { |
73d54c9e LR |
578 | struct regulatory_request request; |
579 | ||
580 | request.wiphy_idx = get_wiphy_idx(wiphy); | |
581 | request.initiator = NL80211_REGDOM_SET_BY_DRIVER; | |
582 | request.alpha2[0] = '9'; | |
583 | request.alpha2[1] = '9'; | |
584 | ||
585 | nl80211_send_reg_change_event(&request); | |
586 | } | |
587 | ||
79c97e97 | 588 | cfg80211_debugfs_rdev_add(rdev); |
5a652052 | 589 | mutex_unlock(&cfg80211_mutex); |
1ac61302 | 590 | |
c3d34d5d JL |
591 | /* |
592 | * due to a locking dependency this has to be outside of the | |
593 | * cfg80211_mutex lock | |
594 | */ | |
595 | res = rfkill_register(rdev->rfkill); | |
596 | if (res) | |
597 | goto out_rm_dev; | |
598 | ||
ecb44335 SG |
599 | rtnl_lock(); |
600 | rdev->wiphy.registered = true; | |
601 | rtnl_unlock(); | |
2f0accc1 | 602 | return 0; |
1f87f7d3 | 603 | |
5a652052 | 604 | out_rm_dev: |
79c97e97 | 605 | device_del(&rdev->wiphy.dev); |
704232c2 JB |
606 | return res; |
607 | } | |
608 | EXPORT_SYMBOL(wiphy_register); | |
609 | ||
1f87f7d3 JB |
610 | void wiphy_rfkill_start_polling(struct wiphy *wiphy) |
611 | { | |
79c97e97 | 612 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 613 | |
79c97e97 | 614 | if (!rdev->ops->rfkill_poll) |
1f87f7d3 | 615 | return; |
79c97e97 JB |
616 | rdev->rfkill_ops.poll = cfg80211_rfkill_poll; |
617 | rfkill_resume_polling(rdev->rfkill); | |
1f87f7d3 JB |
618 | } |
619 | EXPORT_SYMBOL(wiphy_rfkill_start_polling); | |
620 | ||
621 | void wiphy_rfkill_stop_polling(struct wiphy *wiphy) | |
622 | { | |
79c97e97 | 623 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 624 | |
79c97e97 | 625 | rfkill_pause_polling(rdev->rfkill); |
1f87f7d3 JB |
626 | } |
627 | EXPORT_SYMBOL(wiphy_rfkill_stop_polling); | |
628 | ||
704232c2 JB |
629 | void wiphy_unregister(struct wiphy *wiphy) |
630 | { | |
79c97e97 | 631 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
704232c2 | 632 | |
ecb44335 SG |
633 | rtnl_lock(); |
634 | rdev->wiphy.registered = false; | |
635 | rtnl_unlock(); | |
636 | ||
79c97e97 | 637 | rfkill_unregister(rdev->rfkill); |
1f87f7d3 | 638 | |
f16bfc1c | 639 | /* protect the device list */ |
a1794390 | 640 | mutex_lock(&cfg80211_mutex); |
704232c2 | 641 | |
ad002395 JB |
642 | wait_event(rdev->dev_wait, ({ |
643 | int __count; | |
644 | mutex_lock(&rdev->devlist_mtx); | |
645 | __count = rdev->opencount; | |
646 | mutex_unlock(&rdev->devlist_mtx); | |
c4f60846 | 647 | __count == 0; })); |
ad002395 JB |
648 | |
649 | mutex_lock(&rdev->devlist_mtx); | |
89a54e48 | 650 | BUG_ON(!list_empty(&rdev->wdev_list)); |
ad002395 JB |
651 | mutex_unlock(&rdev->devlist_mtx); |
652 | ||
653 | /* | |
654 | * First remove the hardware from everywhere, this makes | |
655 | * it impossible to find from userspace. | |
656 | */ | |
7bcfaf2f | 657 | debugfs_remove_recursive(rdev->wiphy.debugfsdir); |
5f2aa25e JB |
658 | list_del_rcu(&rdev->list); |
659 | synchronize_rcu(); | |
f16bfc1c JB |
660 | |
661 | /* | |
79c97e97 | 662 | * Try to grab rdev->mtx. If a command is still in progress, |
f16bfc1c JB |
663 | * hopefully the driver will refuse it since it's tearing |
664 | * down the device already. We wait for this command to complete | |
665 | * before unlinking the item from the list. | |
666 | * Note: as codified by the BUG_ON above we cannot get here if | |
ad002395 JB |
667 | * a virtual interface is still present. Hence, we can only get |
668 | * to lock contention here if userspace issues a command that | |
669 | * identified the hardware by wiphy index. | |
f16bfc1c | 670 | */ |
0ff6ce7b | 671 | cfg80211_lock_rdev(rdev); |
ad002395 | 672 | /* nothing */ |
0ff6ce7b | 673 | cfg80211_unlock_rdev(rdev); |
704232c2 | 674 | |
bfead080 LR |
675 | /* |
676 | * If this device got a regulatory hint tell core its | |
677 | * free to listen now to a new shiny device regulatory hint | |
678 | */ | |
679 | wiphy_regulatory_deregister(wiphy); | |
3f2355cb | 680 | |
f5ea9120 | 681 | cfg80211_rdev_list_generation++; |
79c97e97 | 682 | device_del(&rdev->wiphy.dev); |
704232c2 | 683 | |
a1794390 | 684 | mutex_unlock(&cfg80211_mutex); |
6682588a | 685 | |
36e6fea8 | 686 | flush_work(&rdev->scan_done_wk); |
6682588a | 687 | cancel_work_sync(&rdev->conn_work); |
6682588a | 688 | flush_work(&rdev->event_work); |
6d52563f JB |
689 | |
690 | if (rdev->wowlan && rdev->ops->set_wakeup) | |
691 | rdev->ops->set_wakeup(&rdev->wiphy, false); | |
692 | cfg80211_rdev_free_wowlan(rdev); | |
704232c2 JB |
693 | } |
694 | EXPORT_SYMBOL(wiphy_unregister); | |
695 | ||
79c97e97 | 696 | void cfg80211_dev_free(struct cfg80211_registered_device *rdev) |
704232c2 | 697 | { |
2a519311 | 698 | struct cfg80211_internal_bss *scan, *tmp; |
79c97e97 JB |
699 | rfkill_destroy(rdev->rfkill); |
700 | mutex_destroy(&rdev->mtx); | |
701 | mutex_destroy(&rdev->devlist_mtx); | |
c10841ca | 702 | mutex_destroy(&rdev->sched_scan_mtx); |
79c97e97 | 703 | list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list) |
78c1c7e1 | 704 | cfg80211_put_bss(&scan->pub); |
79c97e97 | 705 | kfree(rdev); |
704232c2 JB |
706 | } |
707 | ||
708 | void wiphy_free(struct wiphy *wiphy) | |
709 | { | |
710 | put_device(&wiphy->dev); | |
711 | } | |
712 | EXPORT_SYMBOL(wiphy_free); | |
713 | ||
1f87f7d3 JB |
714 | void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked) |
715 | { | |
79c97e97 | 716 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 717 | |
79c97e97 JB |
718 | if (rfkill_set_hw_state(rdev->rfkill, blocked)) |
719 | schedule_work(&rdev->rfkill_sync); | |
1f87f7d3 JB |
720 | } |
721 | EXPORT_SYMBOL(wiphy_rfkill_set_hw_state); | |
722 | ||
ad002395 JB |
723 | static void wdev_cleanup_work(struct work_struct *work) |
724 | { | |
725 | struct wireless_dev *wdev; | |
726 | struct cfg80211_registered_device *rdev; | |
727 | ||
728 | wdev = container_of(work, struct wireless_dev, cleanup_work); | |
729 | rdev = wiphy_to_dev(wdev->wiphy); | |
730 | ||
731 | cfg80211_lock_rdev(rdev); | |
732 | ||
fd014284 | 733 | if (WARN_ON(rdev->scan_req && rdev->scan_req->wdev == wdev)) { |
ad002395 | 734 | rdev->scan_req->aborted = true; |
01a0ac41 | 735 | ___cfg80211_scan_done(rdev, true); |
ad002395 JB |
736 | } |
737 | ||
c10841ca LC |
738 | cfg80211_unlock_rdev(rdev); |
739 | ||
740 | mutex_lock(&rdev->sched_scan_mtx); | |
741 | ||
807f8a8c LC |
742 | if (WARN_ON(rdev->sched_scan_req && |
743 | rdev->sched_scan_req->dev == wdev->netdev)) { | |
744 | __cfg80211_stop_sched_scan(rdev, false); | |
745 | } | |
746 | ||
c10841ca | 747 | mutex_unlock(&rdev->sched_scan_mtx); |
ad002395 JB |
748 | |
749 | mutex_lock(&rdev->devlist_mtx); | |
750 | rdev->opencount--; | |
751 | mutex_unlock(&rdev->devlist_mtx); | |
752 | wake_up(&rdev->dev_wait); | |
753 | ||
754 | dev_put(wdev->netdev); | |
755 | } | |
756 | ||
98104fde JB |
757 | void cfg80211_unregister_wdev(struct wireless_dev *wdev) |
758 | { | |
759 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy); | |
760 | ||
761 | ASSERT_RTNL(); | |
762 | ||
763 | if (WARN_ON(wdev->netdev)) | |
764 | return; | |
765 | ||
766 | mutex_lock(&rdev->devlist_mtx); | |
767 | list_del_rcu(&wdev->list); | |
768 | rdev->devlist_generation++; | |
769 | ||
770 | switch (wdev->iftype) { | |
771 | case NL80211_IFTYPE_P2P_DEVICE: | |
772 | if (!wdev->p2p_started) | |
773 | break; | |
774 | rdev->ops->stop_p2p_device(&rdev->wiphy, wdev); | |
775 | wdev->p2p_started = false; | |
776 | rdev->opencount--; | |
777 | break; | |
778 | default: | |
779 | WARN_ON_ONCE(1); | |
780 | break; | |
781 | } | |
782 | mutex_unlock(&rdev->devlist_mtx); | |
783 | } | |
784 | EXPORT_SYMBOL(cfg80211_unregister_wdev); | |
785 | ||
053a93dd MH |
786 | static struct device_type wiphy_type = { |
787 | .name = "wlan", | |
788 | }; | |
789 | ||
dbbae26a MK |
790 | void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, |
791 | enum nl80211_iftype iftype, int num) | |
792 | { | |
c5a7e582 | 793 | ASSERT_RTNL(); |
dbbae26a MK |
794 | |
795 | rdev->num_running_ifaces += num; | |
796 | if (iftype == NL80211_IFTYPE_MONITOR) | |
797 | rdev->num_running_monitor_ifaces += num; | |
dbbae26a MK |
798 | } |
799 | ||
c4f60846 | 800 | static int cfg80211_netdev_notifier_call(struct notifier_block *nb, |
704232c2 JB |
801 | unsigned long state, |
802 | void *ndev) | |
803 | { | |
804 | struct net_device *dev = ndev; | |
2a783c13 | 805 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
704232c2 | 806 | struct cfg80211_registered_device *rdev; |
7527a782 | 807 | int ret; |
704232c2 | 808 | |
2a783c13 | 809 | if (!wdev) |
1f87f7d3 | 810 | return NOTIFY_DONE; |
704232c2 | 811 | |
2a783c13 | 812 | rdev = wiphy_to_dev(wdev->wiphy); |
704232c2 | 813 | |
2a783c13 | 814 | WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); |
60719ffd | 815 | |
704232c2 | 816 | switch (state) { |
053a93dd MH |
817 | case NETDEV_POST_INIT: |
818 | SET_NETDEV_DEVTYPE(dev, &wiphy_type); | |
819 | break; | |
704232c2 | 820 | case NETDEV_REGISTER: |
0ff6ce7b JB |
821 | /* |
822 | * NB: cannot take rdev->mtx here because this may be | |
823 | * called within code protected by it when interfaces | |
824 | * are added with nl80211. | |
825 | */ | |
667503dd | 826 | mutex_init(&wdev->mtx); |
ad002395 | 827 | INIT_WORK(&wdev->cleanup_work, wdev_cleanup_work); |
667503dd JB |
828 | INIT_LIST_HEAD(&wdev->event_list); |
829 | spin_lock_init(&wdev->event_lock); | |
2e161f78 JB |
830 | INIT_LIST_HEAD(&wdev->mgmt_registrations); |
831 | spin_lock_init(&wdev->mgmt_registrations_lock); | |
026331c4 | 832 | |
704232c2 | 833 | mutex_lock(&rdev->devlist_mtx); |
89a54e48 JB |
834 | wdev->identifier = ++rdev->wdev_id; |
835 | list_add_rcu(&wdev->list, &rdev->wdev_list); | |
f5ea9120 | 836 | rdev->devlist_generation++; |
463d0183 JB |
837 | /* can only change netns with wiphy */ |
838 | dev->features |= NETIF_F_NETNS_LOCAL; | |
839 | ||
704232c2 JB |
840 | if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj, |
841 | "phy80211")) { | |
e9c0268f | 842 | pr_err("failed to add phy80211 symlink to netdev!\n"); |
704232c2 | 843 | } |
2a783c13 | 844 | wdev->netdev = dev; |
b23aa676 | 845 | wdev->sme_state = CFG80211_SME_IDLE; |
bc92afd9 | 846 | mutex_unlock(&rdev->devlist_mtx); |
3d23e349 | 847 | #ifdef CONFIG_CFG80211_WEXT |
2a783c13 JB |
848 | wdev->wext.default_key = -1; |
849 | wdev->wext.default_mgmt_key = -1; | |
f2129354 | 850 | wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; |
ffb9eb3d KV |
851 | #endif |
852 | ||
5be83de5 | 853 | if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT) |
ffb9eb3d | 854 | wdev->ps = true; |
5be83de5 | 855 | else |
ffb9eb3d | 856 | wdev->ps = false; |
9043f3b8 JO |
857 | /* allow mac80211 to determine the timeout */ |
858 | wdev->ps_timeout = -1; | |
ffb9eb3d | 859 | |
4890e3be JL |
860 | if (!dev->ethtool_ops) |
861 | dev->ethtool_ops = &cfg80211_ethtool_ops; | |
ad4bb6f8 JB |
862 | |
863 | if ((wdev->iftype == NL80211_IFTYPE_STATION || | |
074ac8df | 864 | wdev->iftype == NL80211_IFTYPE_P2P_CLIENT || |
ad4bb6f8 JB |
865 | wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr) |
866 | dev->priv_flags |= IFF_DONT_BRIDGE; | |
704232c2 | 867 | break; |
04a773ad | 868 | case NETDEV_GOING_DOWN: |
b23aa676 SO |
869 | switch (wdev->iftype) { |
870 | case NL80211_IFTYPE_ADHOC: | |
871 | cfg80211_leave_ibss(rdev, dev, true); | |
872 | break; | |
074ac8df | 873 | case NL80211_IFTYPE_P2P_CLIENT: |
b23aa676 | 874 | case NL80211_IFTYPE_STATION: |
c10841ca | 875 | mutex_lock(&rdev->sched_scan_mtx); |
807f8a8c | 876 | __cfg80211_stop_sched_scan(rdev, false); |
c10841ca | 877 | mutex_unlock(&rdev->sched_scan_mtx); |
807f8a8c | 878 | |
667503dd | 879 | wdev_lock(wdev); |
3d23e349 | 880 | #ifdef CONFIG_CFG80211_WEXT |
f2129354 JB |
881 | kfree(wdev->wext.ie); |
882 | wdev->wext.ie = NULL; | |
883 | wdev->wext.ie_len = 0; | |
0eb14647 | 884 | wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; |
f2129354 | 885 | #endif |
667503dd JB |
886 | __cfg80211_disconnect(rdev, dev, |
887 | WLAN_REASON_DEAUTH_LEAVING, true); | |
19957bb3 | 888 | cfg80211_mlme_down(rdev, dev); |
667503dd | 889 | wdev_unlock(wdev); |
b23aa676 | 890 | break; |
29cbe68c JB |
891 | case NL80211_IFTYPE_MESH_POINT: |
892 | cfg80211_leave_mesh(rdev, dev); | |
893 | break; | |
ac800140 MK |
894 | case NL80211_IFTYPE_AP: |
895 | cfg80211_stop_ap(rdev, dev); | |
896 | break; | |
b23aa676 SO |
897 | default: |
898 | break; | |
899 | } | |
56d1893d | 900 | wdev->beacon_interval = 0; |
01a0ac41 JB |
901 | break; |
902 | case NETDEV_DOWN: | |
dbbae26a | 903 | cfg80211_update_iface_num(rdev, wdev->iftype, -1); |
c5a7e582 | 904 | dev_hold(dev); |
e60d7443 | 905 | queue_work(cfg80211_wq, &wdev->cleanup_work); |
04a773ad JB |
906 | break; |
907 | case NETDEV_UP: | |
ad002395 JB |
908 | /* |
909 | * If we have a really quick DOWN/UP succession we may | |
910 | * have this work still pending ... cancel it and see | |
911 | * if it was pending, in which case we need to account | |
912 | * for some of the work it would have done. | |
913 | */ | |
914 | if (cancel_work_sync(&wdev->cleanup_work)) { | |
915 | mutex_lock(&rdev->devlist_mtx); | |
916 | rdev->opencount--; | |
917 | mutex_unlock(&rdev->devlist_mtx); | |
918 | dev_put(dev); | |
919 | } | |
4290cb4b | 920 | cfg80211_update_iface_num(rdev, wdev->iftype, 1); |
667503dd | 921 | cfg80211_lock_rdev(rdev); |
aee83eaf | 922 | mutex_lock(&rdev->devlist_mtx); |
667503dd | 923 | wdev_lock(wdev); |
f2129354 | 924 | switch (wdev->iftype) { |
29cbe68c | 925 | #ifdef CONFIG_CFG80211_WEXT |
f2129354 | 926 | case NL80211_IFTYPE_ADHOC: |
fffd0934 | 927 | cfg80211_ibss_wext_join(rdev, wdev); |
04a773ad | 928 | break; |
f2129354 | 929 | case NL80211_IFTYPE_STATION: |
fffd0934 | 930 | cfg80211_mgd_wext_connect(rdev, wdev); |
f2129354 | 931 | break; |
29cbe68c | 932 | #endif |
c80d545d | 933 | #ifdef CONFIG_MAC80211_MESH |
29cbe68c | 934 | case NL80211_IFTYPE_MESH_POINT: |
c80d545d JC |
935 | { |
936 | /* backward compat code... */ | |
937 | struct mesh_setup setup; | |
938 | memcpy(&setup, &default_mesh_setup, | |
939 | sizeof(setup)); | |
940 | /* back compat only needed for mesh_id */ | |
941 | setup.mesh_id = wdev->ssid; | |
942 | setup.mesh_id_len = wdev->mesh_id_up_len; | |
943 | if (wdev->mesh_id_up_len) | |
944 | __cfg80211_join_mesh(rdev, dev, | |
945 | &setup, | |
946 | &default_mesh_config); | |
947 | break; | |
948 | } | |
949 | #endif | |
f2129354 | 950 | default: |
04a773ad | 951 | break; |
f2129354 | 952 | } |
667503dd | 953 | wdev_unlock(wdev); |
ad002395 | 954 | rdev->opencount++; |
aee83eaf | 955 | mutex_unlock(&rdev->devlist_mtx); |
667503dd | 956 | cfg80211_unlock_rdev(rdev); |
bf6a0579 JO |
957 | |
958 | /* | |
959 | * Configure power management to the driver here so that its | |
960 | * correctly set also after interface type changes etc. | |
961 | */ | |
5966f2dd EP |
962 | if ((wdev->iftype == NL80211_IFTYPE_STATION || |
963 | wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) && | |
bf6a0579 JO |
964 | rdev->ops->set_power_mgmt) |
965 | if (rdev->ops->set_power_mgmt(wdev->wiphy, dev, | |
966 | wdev->ps, | |
967 | wdev->ps_timeout)) { | |
968 | /* assume this means it's off */ | |
969 | wdev->ps = false; | |
970 | } | |
2a783c13 | 971 | break; |
704232c2 | 972 | case NETDEV_UNREGISTER: |
0ff6ce7b JB |
973 | /* |
974 | * NB: cannot take rdev->mtx here because this may be | |
975 | * called within code protected by it when interfaces | |
976 | * are removed with nl80211. | |
977 | */ | |
704232c2 | 978 | mutex_lock(&rdev->devlist_mtx); |
e40cbdac JB |
979 | /* |
980 | * It is possible to get NETDEV_UNREGISTER | |
981 | * multiple times. To detect that, check | |
982 | * that the interface is still on the list | |
983 | * of registered interfaces, and only then | |
984 | * remove and clean it up. | |
985 | */ | |
2a783c13 | 986 | if (!list_empty(&wdev->list)) { |
704232c2 | 987 | sysfs_remove_link(&dev->dev.kobj, "phy80211"); |
5f2aa25e | 988 | list_del_rcu(&wdev->list); |
f5ea9120 | 989 | rdev->devlist_generation++; |
2e161f78 | 990 | cfg80211_mlme_purge_registrations(wdev); |
3d23e349 | 991 | #ifdef CONFIG_CFG80211_WEXT |
e40cbdac | 992 | kfree(wdev->wext.keys); |
fffd0934 | 993 | #endif |
e40cbdac JB |
994 | } |
995 | mutex_unlock(&rdev->devlist_mtx); | |
5f2aa25e JB |
996 | /* |
997 | * synchronise (so that we won't find this netdev | |
998 | * from other code any more) and then clear the list | |
999 | * head so that the above code can safely check for | |
1000 | * !list_empty() to avoid double-cleanup. | |
1001 | */ | |
1002 | synchronize_rcu(); | |
1003 | INIT_LIST_HEAD(&wdev->list); | |
1f6fc43e DD |
1004 | /* |
1005 | * Ensure that all events have been processed and | |
1006 | * freed. | |
1007 | */ | |
1008 | cfg80211_process_wdev_events(wdev); | |
704232c2 | 1009 | break; |
1f87f7d3 | 1010 | case NETDEV_PRE_UP: |
0b20633d JB |
1011 | if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype))) |
1012 | return notifier_from_errno(-EOPNOTSUPP); | |
1f87f7d3 JB |
1013 | if (rfkill_blocked(rdev->rfkill)) |
1014 | return notifier_from_errno(-ERFKILL); | |
e4e32459 | 1015 | mutex_lock(&rdev->devlist_mtx); |
7527a782 | 1016 | ret = cfg80211_can_add_interface(rdev, wdev->iftype); |
e4e32459 | 1017 | mutex_unlock(&rdev->devlist_mtx); |
7527a782 JB |
1018 | if (ret) |
1019 | return notifier_from_errno(ret); | |
1f87f7d3 | 1020 | break; |
704232c2 JB |
1021 | } |
1022 | ||
1f87f7d3 | 1023 | return NOTIFY_DONE; |
704232c2 JB |
1024 | } |
1025 | ||
1026 | static struct notifier_block cfg80211_netdev_notifier = { | |
1027 | .notifier_call = cfg80211_netdev_notifier_call, | |
1028 | }; | |
1029 | ||
463d0183 JB |
1030 | static void __net_exit cfg80211_pernet_exit(struct net *net) |
1031 | { | |
1032 | struct cfg80211_registered_device *rdev; | |
1033 | ||
1034 | rtnl_lock(); | |
1035 | mutex_lock(&cfg80211_mutex); | |
1036 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
1037 | if (net_eq(wiphy_net(&rdev->wiphy), net)) | |
1038 | WARN_ON(cfg80211_switch_netns(rdev, &init_net)); | |
1039 | } | |
1040 | mutex_unlock(&cfg80211_mutex); | |
1041 | rtnl_unlock(); | |
1042 | } | |
1043 | ||
1044 | static struct pernet_operations cfg80211_pernet_ops = { | |
1045 | .exit = cfg80211_pernet_exit, | |
1046 | }; | |
1047 | ||
1048 | static int __init cfg80211_init(void) | |
704232c2 | 1049 | { |
b2e1b302 LR |
1050 | int err; |
1051 | ||
463d0183 JB |
1052 | err = register_pernet_device(&cfg80211_pernet_ops); |
1053 | if (err) | |
1054 | goto out_fail_pernet; | |
1055 | ||
b2e1b302 | 1056 | err = wiphy_sysfs_init(); |
704232c2 JB |
1057 | if (err) |
1058 | goto out_fail_sysfs; | |
1059 | ||
1060 | err = register_netdevice_notifier(&cfg80211_netdev_notifier); | |
1061 | if (err) | |
1062 | goto out_fail_notifier; | |
1063 | ||
55682965 JB |
1064 | err = nl80211_init(); |
1065 | if (err) | |
1066 | goto out_fail_nl80211; | |
1067 | ||
704232c2 JB |
1068 | ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); |
1069 | ||
b2e1b302 LR |
1070 | err = regulatory_init(); |
1071 | if (err) | |
1072 | goto out_fail_reg; | |
1073 | ||
e60d7443 AB |
1074 | cfg80211_wq = create_singlethread_workqueue("cfg80211"); |
1075 | if (!cfg80211_wq) | |
1076 | goto out_fail_wq; | |
1077 | ||
704232c2 JB |
1078 | return 0; |
1079 | ||
e60d7443 AB |
1080 | out_fail_wq: |
1081 | regulatory_exit(); | |
b2e1b302 LR |
1082 | out_fail_reg: |
1083 | debugfs_remove(ieee80211_debugfs_dir); | |
55682965 JB |
1084 | out_fail_nl80211: |
1085 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); | |
704232c2 JB |
1086 | out_fail_notifier: |
1087 | wiphy_sysfs_exit(); | |
1088 | out_fail_sysfs: | |
463d0183 JB |
1089 | unregister_pernet_device(&cfg80211_pernet_ops); |
1090 | out_fail_pernet: | |
704232c2 JB |
1091 | return err; |
1092 | } | |
3a462465 | 1093 | subsys_initcall(cfg80211_init); |
704232c2 | 1094 | |
f884e387 | 1095 | static void __exit cfg80211_exit(void) |
704232c2 JB |
1096 | { |
1097 | debugfs_remove(ieee80211_debugfs_dir); | |
55682965 | 1098 | nl80211_exit(); |
704232c2 JB |
1099 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); |
1100 | wiphy_sysfs_exit(); | |
b2e1b302 | 1101 | regulatory_exit(); |
463d0183 | 1102 | unregister_pernet_device(&cfg80211_pernet_ops); |
e60d7443 | 1103 | destroy_workqueue(cfg80211_wq); |
704232c2 JB |
1104 | } |
1105 | module_exit(cfg80211_exit); |