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 | |
89a54e48 | 233 | list_for_each_entry(wdev, &rdev->wdev_list, list) |
ba22fb5b JB |
234 | if (wdev->netdev) |
235 | dev_close(wdev->netdev); | |
1f87f7d3 | 236 | |
79c97e97 | 237 | mutex_unlock(&rdev->devlist_mtx); |
1f87f7d3 JB |
238 | rtnl_unlock(); |
239 | ||
240 | return 0; | |
241 | } | |
242 | ||
243 | static void cfg80211_rfkill_sync_work(struct work_struct *work) | |
244 | { | |
79c97e97 | 245 | struct cfg80211_registered_device *rdev; |
1f87f7d3 | 246 | |
79c97e97 JB |
247 | rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync); |
248 | cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill)); | |
1f87f7d3 JB |
249 | } |
250 | ||
667503dd JB |
251 | static void cfg80211_event_work(struct work_struct *work) |
252 | { | |
253 | struct cfg80211_registered_device *rdev; | |
667503dd JB |
254 | |
255 | rdev = container_of(work, struct cfg80211_registered_device, | |
256 | event_work); | |
257 | ||
258 | rtnl_lock(); | |
259 | cfg80211_lock_rdev(rdev); | |
667503dd | 260 | |
3d54d255 | 261 | cfg80211_process_rdev_events(rdev); |
667503dd JB |
262 | cfg80211_unlock_rdev(rdev); |
263 | rtnl_unlock(); | |
264 | } | |
265 | ||
704232c2 JB |
266 | /* exported functions */ |
267 | ||
3dcf670b | 268 | struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv) |
704232c2 | 269 | { |
638af073 | 270 | static int wiphy_counter; |
7623225f JB |
271 | |
272 | struct cfg80211_registered_device *rdev; | |
704232c2 JB |
273 | int alloc_size; |
274 | ||
0b20633d JB |
275 | WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key)); |
276 | WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc)); | |
277 | WARN_ON(ops->connect && !ops->disconnect); | |
278 | WARN_ON(ops->join_ibss && !ops->leave_ibss); | |
279 | WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf); | |
280 | WARN_ON(ops->add_station && !ops->del_station); | |
281 | WARN_ON(ops->add_mpath && !ops->del_mpath); | |
29cbe68c | 282 | WARN_ON(ops->join_mesh && !ops->leave_mesh); |
41ade00f | 283 | |
79c97e97 | 284 | alloc_size = sizeof(*rdev) + sizeof_priv; |
704232c2 | 285 | |
79c97e97 JB |
286 | rdev = kzalloc(alloc_size, GFP_KERNEL); |
287 | if (!rdev) | |
704232c2 JB |
288 | return NULL; |
289 | ||
79c97e97 | 290 | rdev->ops = ops; |
704232c2 | 291 | |
a1794390 | 292 | mutex_lock(&cfg80211_mutex); |
704232c2 | 293 | |
79c97e97 | 294 | rdev->wiphy_idx = wiphy_counter++; |
a4d73ee1 | 295 | |
79c97e97 | 296 | if (unlikely(!wiphy_idx_valid(rdev->wiphy_idx))) { |
638af073 | 297 | wiphy_counter--; |
a1794390 | 298 | mutex_unlock(&cfg80211_mutex); |
7623225f | 299 | /* ugh, wrapped! */ |
79c97e97 | 300 | kfree(rdev); |
704232c2 JB |
301 | return NULL; |
302 | } | |
704232c2 | 303 | |
5a254ffe | 304 | mutex_unlock(&cfg80211_mutex); |
79c97e97 | 305 | |
7623225f JB |
306 | /* give it a proper name */ |
307 | dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx); | |
308 | ||
79c97e97 JB |
309 | mutex_init(&rdev->mtx); |
310 | mutex_init(&rdev->devlist_mtx); | |
c10841ca | 311 | mutex_init(&rdev->sched_scan_mtx); |
89a54e48 | 312 | INIT_LIST_HEAD(&rdev->wdev_list); |
79c97e97 JB |
313 | spin_lock_init(&rdev->bss_lock); |
314 | INIT_LIST_HEAD(&rdev->bss_list); | |
315 | INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done); | |
807f8a8c | 316 | INIT_WORK(&rdev->sched_scan_results_wk, __cfg80211_sched_scan_results); |
3d23e349 JB |
317 | #ifdef CONFIG_CFG80211_WEXT |
318 | rdev->wiphy.wext = &cfg80211_wext_handler; | |
319 | #endif | |
320 | ||
79c97e97 JB |
321 | device_initialize(&rdev->wiphy.dev); |
322 | rdev->wiphy.dev.class = &ieee80211_class; | |
323 | rdev->wiphy.dev.platform_data = rdev; | |
324 | ||
5be83de5 JB |
325 | #ifdef CONFIG_CFG80211_DEFAULT_PS |
326 | rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; | |
327 | #endif | |
16cb9d42 | 328 | |
463d0183 JB |
329 | wiphy_net_set(&rdev->wiphy, &init_net); |
330 | ||
79c97e97 JB |
331 | rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block; |
332 | rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev), | |
333 | &rdev->wiphy.dev, RFKILL_TYPE_WLAN, | |
334 | &rdev->rfkill_ops, rdev); | |
335 | ||
336 | if (!rdev->rfkill) { | |
337 | kfree(rdev); | |
1f87f7d3 JB |
338 | return NULL; |
339 | } | |
340 | ||
79c97e97 JB |
341 | INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work); |
342 | INIT_WORK(&rdev->conn_work, cfg80211_conn_work); | |
343 | INIT_WORK(&rdev->event_work, cfg80211_event_work); | |
1f87f7d3 | 344 | |
ad002395 JB |
345 | init_waitqueue_head(&rdev->dev_wait); |
346 | ||
b9a5f8ca JM |
347 | /* |
348 | * Initialize wiphy parameters to IEEE 802.11 MIB default values. | |
349 | * Fragmentation and RTS threshold are disabled by default with the | |
350 | * special -1 value. | |
351 | */ | |
79c97e97 JB |
352 | rdev->wiphy.retry_short = 7; |
353 | rdev->wiphy.retry_long = 4; | |
354 | rdev->wiphy.frag_threshold = (u32) -1; | |
355 | rdev->wiphy.rts_threshold = (u32) -1; | |
81077e82 | 356 | rdev->wiphy.coverage_class = 0; |
b9a5f8ca | 357 | |
79c97e97 | 358 | return &rdev->wiphy; |
704232c2 JB |
359 | } |
360 | EXPORT_SYMBOL(wiphy_new); | |
361 | ||
7527a782 JB |
362 | static int wiphy_verify_combinations(struct wiphy *wiphy) |
363 | { | |
364 | const struct ieee80211_iface_combination *c; | |
365 | int i, j; | |
366 | ||
7527a782 JB |
367 | for (i = 0; i < wiphy->n_iface_combinations; i++) { |
368 | u32 cnt = 0; | |
369 | u16 all_iftypes = 0; | |
370 | ||
371 | c = &wiphy->iface_combinations[i]; | |
372 | ||
373 | /* Combinations with just one interface aren't real */ | |
374 | if (WARN_ON(c->max_interfaces < 2)) | |
375 | return -EINVAL; | |
376 | ||
377 | /* Need at least one channel */ | |
378 | if (WARN_ON(!c->num_different_channels)) | |
379 | return -EINVAL; | |
380 | ||
d4e50c59 MK |
381 | /* |
382 | * Put a sane limit on maximum number of different | |
383 | * channels to simplify channel accounting code. | |
384 | */ | |
385 | if (WARN_ON(c->num_different_channels > | |
386 | CFG80211_MAX_NUM_DIFFERENT_CHANNELS)) | |
387 | return -EINVAL; | |
388 | ||
7527a782 JB |
389 | if (WARN_ON(!c->n_limits)) |
390 | return -EINVAL; | |
391 | ||
392 | for (j = 0; j < c->n_limits; j++) { | |
393 | u16 types = c->limits[j].types; | |
394 | ||
395 | /* | |
396 | * interface types shouldn't overlap, this is | |
397 | * used in cfg80211_can_change_interface() | |
398 | */ | |
399 | if (WARN_ON(types & all_iftypes)) | |
400 | return -EINVAL; | |
401 | all_iftypes |= types; | |
402 | ||
403 | if (WARN_ON(!c->limits[j].max)) | |
404 | return -EINVAL; | |
405 | ||
406 | /* Shouldn't list software iftypes in combinations! */ | |
407 | if (WARN_ON(wiphy->software_iftypes & types)) | |
408 | return -EINVAL; | |
409 | ||
410 | cnt += c->limits[j].max; | |
411 | /* | |
412 | * Don't advertise an unsupported type | |
413 | * in a combination. | |
414 | */ | |
415 | if (WARN_ON((wiphy->interface_modes & types) != types)) | |
416 | return -EINVAL; | |
417 | } | |
418 | ||
419 | /* You can't even choose that many! */ | |
420 | if (WARN_ON(cnt < c->max_interfaces)) | |
421 | return -EINVAL; | |
422 | } | |
423 | ||
424 | return 0; | |
425 | } | |
426 | ||
704232c2 JB |
427 | int wiphy_register(struct wiphy *wiphy) |
428 | { | |
79c97e97 | 429 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
704232c2 | 430 | int res; |
8318d78a JB |
431 | enum ieee80211_band band; |
432 | struct ieee80211_supported_band *sband; | |
433 | bool have_band = false; | |
434 | int i; | |
f59ac048 LR |
435 | u16 ifmodes = wiphy->interface_modes; |
436 | ||
dfb89c56 | 437 | #ifdef CONFIG_PM |
77dbbb13 JB |
438 | if (WARN_ON((wiphy->wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) && |
439 | !(wiphy->wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY))) | |
440 | return -EINVAL; | |
dfb89c56 | 441 | #endif |
77dbbb13 | 442 | |
562a7480 JB |
443 | if (WARN_ON(wiphy->ap_sme_capa && |
444 | !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME))) | |
445 | return -EINVAL; | |
446 | ||
ef15aac6 JB |
447 | if (WARN_ON(wiphy->addresses && !wiphy->n_addresses)) |
448 | return -EINVAL; | |
449 | ||
450 | if (WARN_ON(wiphy->addresses && | |
451 | !is_zero_ether_addr(wiphy->perm_addr) && | |
452 | memcmp(wiphy->perm_addr, wiphy->addresses[0].addr, | |
453 | ETH_ALEN))) | |
454 | return -EINVAL; | |
455 | ||
456 | if (wiphy->addresses) | |
457 | memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN); | |
458 | ||
f59ac048 LR |
459 | /* sanity check ifmodes */ |
460 | WARN_ON(!ifmodes); | |
2e161f78 | 461 | ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1; |
f59ac048 LR |
462 | if (WARN_ON(ifmodes != wiphy->interface_modes)) |
463 | wiphy->interface_modes = ifmodes; | |
8318d78a | 464 | |
7527a782 JB |
465 | res = wiphy_verify_combinations(wiphy); |
466 | if (res) | |
467 | return res; | |
468 | ||
8318d78a JB |
469 | /* sanity check supported bands/channels */ |
470 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
471 | sband = wiphy->bands[band]; | |
472 | if (!sband) | |
473 | continue; | |
474 | ||
475 | sband->band = band; | |
3a0c52a6 VK |
476 | if (WARN_ON(!sband->n_channels)) |
477 | return -EINVAL; | |
478 | /* | |
479 | * on 60gHz band, there are no legacy rates, so | |
480 | * n_bitrates is 0 | |
481 | */ | |
482 | if (WARN_ON(band != IEEE80211_BAND_60GHZ && | |
483 | !sband->n_bitrates)) | |
881d948c JB |
484 | return -EINVAL; |
485 | ||
40db6c77 AK |
486 | /* |
487 | * Since cfg80211_disable_40mhz_24ghz is global, we can | |
488 | * modify the sband's ht data even if the driver uses a | |
489 | * global structure for that. | |
490 | */ | |
491 | if (cfg80211_disable_40mhz_24ghz && | |
492 | band == IEEE80211_BAND_2GHZ && | |
493 | sband->ht_cap.ht_supported) { | |
494 | sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
495 | sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40; | |
496 | } | |
497 | ||
881d948c JB |
498 | /* |
499 | * Since we use a u32 for rate bitmaps in | |
500 | * ieee80211_get_response_rate, we cannot | |
501 | * have more than 32 legacy rates. | |
502 | */ | |
503 | if (WARN_ON(sband->n_bitrates > 32)) | |
8318d78a | 504 | return -EINVAL; |
8318d78a JB |
505 | |
506 | for (i = 0; i < sband->n_channels; i++) { | |
507 | sband->channels[i].orig_flags = | |
508 | sband->channels[i].flags; | |
509 | sband->channels[i].orig_mag = | |
510 | sband->channels[i].max_antenna_gain; | |
511 | sband->channels[i].orig_mpwr = | |
512 | sband->channels[i].max_power; | |
513 | sband->channels[i].band = band; | |
514 | } | |
515 | ||
516 | have_band = true; | |
517 | } | |
518 | ||
519 | if (!have_band) { | |
520 | WARN_ON(1); | |
521 | return -EINVAL; | |
522 | } | |
523 | ||
dfb89c56 | 524 | #ifdef CONFIG_PM |
ff1b6e69 JB |
525 | if (rdev->wiphy.wowlan.n_patterns) { |
526 | if (WARN_ON(!rdev->wiphy.wowlan.pattern_min_len || | |
527 | rdev->wiphy.wowlan.pattern_min_len > | |
528 | rdev->wiphy.wowlan.pattern_max_len)) | |
529 | return -EINVAL; | |
530 | } | |
dfb89c56 | 531 | #endif |
ff1b6e69 | 532 | |
8318d78a JB |
533 | /* check and set up bitrates */ |
534 | ieee80211_set_bitrate_flags(wiphy); | |
535 | ||
5a652052 MB |
536 | mutex_lock(&cfg80211_mutex); |
537 | ||
79c97e97 | 538 | res = device_add(&rdev->wiphy.dev); |
c3d34d5d JL |
539 | if (res) { |
540 | mutex_unlock(&cfg80211_mutex); | |
541 | return res; | |
542 | } | |
1f87f7d3 | 543 | |
2f0accc1 | 544 | /* set up regulatory info */ |
57b5ce07 | 545 | wiphy_regulatory_register(wiphy); |
eac03e38 | 546 | regulatory_update(wiphy, NL80211_REGDOM_SET_BY_CORE); |
2f0accc1 | 547 | |
5f2aa25e | 548 | list_add_rcu(&rdev->list, &cfg80211_rdev_list); |
f5ea9120 | 549 | cfg80211_rdev_list_generation++; |
704232c2 JB |
550 | |
551 | /* add to debugfs */ | |
79c97e97 JB |
552 | rdev->wiphy.debugfsdir = |
553 | debugfs_create_dir(wiphy_name(&rdev->wiphy), | |
704232c2 | 554 | ieee80211_debugfs_dir); |
79c97e97 JB |
555 | if (IS_ERR(rdev->wiphy.debugfsdir)) |
556 | rdev->wiphy.debugfsdir = NULL; | |
704232c2 | 557 | |
5be83de5 | 558 | if (wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { |
73d54c9e LR |
559 | struct regulatory_request request; |
560 | ||
561 | request.wiphy_idx = get_wiphy_idx(wiphy); | |
562 | request.initiator = NL80211_REGDOM_SET_BY_DRIVER; | |
563 | request.alpha2[0] = '9'; | |
564 | request.alpha2[1] = '9'; | |
565 | ||
566 | nl80211_send_reg_change_event(&request); | |
567 | } | |
568 | ||
79c97e97 | 569 | cfg80211_debugfs_rdev_add(rdev); |
5a652052 | 570 | mutex_unlock(&cfg80211_mutex); |
1ac61302 | 571 | |
c3d34d5d JL |
572 | /* |
573 | * due to a locking dependency this has to be outside of the | |
574 | * cfg80211_mutex lock | |
575 | */ | |
576 | res = rfkill_register(rdev->rfkill); | |
577 | if (res) | |
578 | goto out_rm_dev; | |
579 | ||
ecb44335 SG |
580 | rtnl_lock(); |
581 | rdev->wiphy.registered = true; | |
582 | rtnl_unlock(); | |
2f0accc1 | 583 | return 0; |
1f87f7d3 | 584 | |
5a652052 | 585 | out_rm_dev: |
79c97e97 | 586 | device_del(&rdev->wiphy.dev); |
704232c2 JB |
587 | return res; |
588 | } | |
589 | EXPORT_SYMBOL(wiphy_register); | |
590 | ||
1f87f7d3 JB |
591 | void wiphy_rfkill_start_polling(struct wiphy *wiphy) |
592 | { | |
79c97e97 | 593 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 594 | |
79c97e97 | 595 | if (!rdev->ops->rfkill_poll) |
1f87f7d3 | 596 | return; |
79c97e97 JB |
597 | rdev->rfkill_ops.poll = cfg80211_rfkill_poll; |
598 | rfkill_resume_polling(rdev->rfkill); | |
1f87f7d3 JB |
599 | } |
600 | EXPORT_SYMBOL(wiphy_rfkill_start_polling); | |
601 | ||
602 | void wiphy_rfkill_stop_polling(struct wiphy *wiphy) | |
603 | { | |
79c97e97 | 604 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 605 | |
79c97e97 | 606 | rfkill_pause_polling(rdev->rfkill); |
1f87f7d3 JB |
607 | } |
608 | EXPORT_SYMBOL(wiphy_rfkill_stop_polling); | |
609 | ||
704232c2 JB |
610 | void wiphy_unregister(struct wiphy *wiphy) |
611 | { | |
79c97e97 | 612 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
704232c2 | 613 | |
ecb44335 SG |
614 | rtnl_lock(); |
615 | rdev->wiphy.registered = false; | |
616 | rtnl_unlock(); | |
617 | ||
79c97e97 | 618 | rfkill_unregister(rdev->rfkill); |
1f87f7d3 | 619 | |
f16bfc1c | 620 | /* protect the device list */ |
a1794390 | 621 | mutex_lock(&cfg80211_mutex); |
704232c2 | 622 | |
ad002395 JB |
623 | wait_event(rdev->dev_wait, ({ |
624 | int __count; | |
625 | mutex_lock(&rdev->devlist_mtx); | |
626 | __count = rdev->opencount; | |
627 | mutex_unlock(&rdev->devlist_mtx); | |
c4f60846 | 628 | __count == 0; })); |
ad002395 JB |
629 | |
630 | mutex_lock(&rdev->devlist_mtx); | |
89a54e48 | 631 | BUG_ON(!list_empty(&rdev->wdev_list)); |
ad002395 JB |
632 | mutex_unlock(&rdev->devlist_mtx); |
633 | ||
634 | /* | |
635 | * First remove the hardware from everywhere, this makes | |
636 | * it impossible to find from userspace. | |
637 | */ | |
7bcfaf2f | 638 | debugfs_remove_recursive(rdev->wiphy.debugfsdir); |
5f2aa25e JB |
639 | list_del_rcu(&rdev->list); |
640 | synchronize_rcu(); | |
f16bfc1c JB |
641 | |
642 | /* | |
79c97e97 | 643 | * Try to grab rdev->mtx. If a command is still in progress, |
f16bfc1c JB |
644 | * hopefully the driver will refuse it since it's tearing |
645 | * down the device already. We wait for this command to complete | |
646 | * before unlinking the item from the list. | |
647 | * Note: as codified by the BUG_ON above we cannot get here if | |
ad002395 JB |
648 | * a virtual interface is still present. Hence, we can only get |
649 | * to lock contention here if userspace issues a command that | |
650 | * identified the hardware by wiphy index. | |
f16bfc1c | 651 | */ |
0ff6ce7b | 652 | cfg80211_lock_rdev(rdev); |
ad002395 | 653 | /* nothing */ |
0ff6ce7b | 654 | cfg80211_unlock_rdev(rdev); |
704232c2 | 655 | |
3f2355cb LR |
656 | /* If this device got a regulatory hint tell core its |
657 | * free to listen now to a new shiny device regulatory hint */ | |
658 | reg_device_remove(wiphy); | |
659 | ||
f5ea9120 | 660 | cfg80211_rdev_list_generation++; |
79c97e97 | 661 | device_del(&rdev->wiphy.dev); |
704232c2 | 662 | |
a1794390 | 663 | mutex_unlock(&cfg80211_mutex); |
6682588a | 664 | |
36e6fea8 | 665 | flush_work(&rdev->scan_done_wk); |
6682588a | 666 | cancel_work_sync(&rdev->conn_work); |
6682588a | 667 | flush_work(&rdev->event_work); |
6d52563f JB |
668 | |
669 | if (rdev->wowlan && rdev->ops->set_wakeup) | |
670 | rdev->ops->set_wakeup(&rdev->wiphy, false); | |
671 | cfg80211_rdev_free_wowlan(rdev); | |
704232c2 JB |
672 | } |
673 | EXPORT_SYMBOL(wiphy_unregister); | |
674 | ||
79c97e97 | 675 | void cfg80211_dev_free(struct cfg80211_registered_device *rdev) |
704232c2 | 676 | { |
2a519311 | 677 | struct cfg80211_internal_bss *scan, *tmp; |
79c97e97 JB |
678 | rfkill_destroy(rdev->rfkill); |
679 | mutex_destroy(&rdev->mtx); | |
680 | mutex_destroy(&rdev->devlist_mtx); | |
c10841ca | 681 | mutex_destroy(&rdev->sched_scan_mtx); |
79c97e97 | 682 | list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list) |
78c1c7e1 | 683 | cfg80211_put_bss(&scan->pub); |
79c97e97 | 684 | kfree(rdev); |
704232c2 JB |
685 | } |
686 | ||
687 | void wiphy_free(struct wiphy *wiphy) | |
688 | { | |
689 | put_device(&wiphy->dev); | |
690 | } | |
691 | EXPORT_SYMBOL(wiphy_free); | |
692 | ||
1f87f7d3 JB |
693 | void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked) |
694 | { | |
79c97e97 | 695 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 696 | |
79c97e97 JB |
697 | if (rfkill_set_hw_state(rdev->rfkill, blocked)) |
698 | schedule_work(&rdev->rfkill_sync); | |
1f87f7d3 JB |
699 | } |
700 | EXPORT_SYMBOL(wiphy_rfkill_set_hw_state); | |
701 | ||
ad002395 JB |
702 | static void wdev_cleanup_work(struct work_struct *work) |
703 | { | |
704 | struct wireless_dev *wdev; | |
705 | struct cfg80211_registered_device *rdev; | |
706 | ||
707 | wdev = container_of(work, struct wireless_dev, cleanup_work); | |
708 | rdev = wiphy_to_dev(wdev->wiphy); | |
709 | ||
710 | cfg80211_lock_rdev(rdev); | |
711 | ||
fd014284 | 712 | if (WARN_ON(rdev->scan_req && rdev->scan_req->wdev == wdev)) { |
ad002395 | 713 | rdev->scan_req->aborted = true; |
01a0ac41 | 714 | ___cfg80211_scan_done(rdev, true); |
ad002395 JB |
715 | } |
716 | ||
c10841ca LC |
717 | cfg80211_unlock_rdev(rdev); |
718 | ||
719 | mutex_lock(&rdev->sched_scan_mtx); | |
720 | ||
807f8a8c LC |
721 | if (WARN_ON(rdev->sched_scan_req && |
722 | rdev->sched_scan_req->dev == wdev->netdev)) { | |
723 | __cfg80211_stop_sched_scan(rdev, false); | |
724 | } | |
725 | ||
c10841ca | 726 | mutex_unlock(&rdev->sched_scan_mtx); |
ad002395 JB |
727 | |
728 | mutex_lock(&rdev->devlist_mtx); | |
729 | rdev->opencount--; | |
730 | mutex_unlock(&rdev->devlist_mtx); | |
731 | wake_up(&rdev->dev_wait); | |
732 | ||
733 | dev_put(wdev->netdev); | |
734 | } | |
735 | ||
053a93dd MH |
736 | static struct device_type wiphy_type = { |
737 | .name = "wlan", | |
738 | }; | |
739 | ||
dbbae26a MK |
740 | void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, |
741 | enum nl80211_iftype iftype, int num) | |
742 | { | |
c5a7e582 | 743 | ASSERT_RTNL(); |
dbbae26a MK |
744 | |
745 | rdev->num_running_ifaces += num; | |
746 | if (iftype == NL80211_IFTYPE_MONITOR) | |
747 | rdev->num_running_monitor_ifaces += num; | |
dbbae26a MK |
748 | } |
749 | ||
c4f60846 | 750 | static int cfg80211_netdev_notifier_call(struct notifier_block *nb, |
704232c2 JB |
751 | unsigned long state, |
752 | void *ndev) | |
753 | { | |
754 | struct net_device *dev = ndev; | |
2a783c13 | 755 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
704232c2 | 756 | struct cfg80211_registered_device *rdev; |
7527a782 | 757 | int ret; |
704232c2 | 758 | |
2a783c13 | 759 | if (!wdev) |
1f87f7d3 | 760 | return NOTIFY_DONE; |
704232c2 | 761 | |
2a783c13 | 762 | rdev = wiphy_to_dev(wdev->wiphy); |
704232c2 | 763 | |
2a783c13 | 764 | WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); |
60719ffd | 765 | |
704232c2 | 766 | switch (state) { |
053a93dd MH |
767 | case NETDEV_POST_INIT: |
768 | SET_NETDEV_DEVTYPE(dev, &wiphy_type); | |
769 | break; | |
704232c2 | 770 | case NETDEV_REGISTER: |
0ff6ce7b JB |
771 | /* |
772 | * NB: cannot take rdev->mtx here because this may be | |
773 | * called within code protected by it when interfaces | |
774 | * are added with nl80211. | |
775 | */ | |
667503dd | 776 | mutex_init(&wdev->mtx); |
ad002395 | 777 | INIT_WORK(&wdev->cleanup_work, wdev_cleanup_work); |
667503dd JB |
778 | INIT_LIST_HEAD(&wdev->event_list); |
779 | spin_lock_init(&wdev->event_lock); | |
2e161f78 JB |
780 | INIT_LIST_HEAD(&wdev->mgmt_registrations); |
781 | spin_lock_init(&wdev->mgmt_registrations_lock); | |
026331c4 | 782 | |
704232c2 | 783 | mutex_lock(&rdev->devlist_mtx); |
89a54e48 JB |
784 | wdev->identifier = ++rdev->wdev_id; |
785 | list_add_rcu(&wdev->list, &rdev->wdev_list); | |
f5ea9120 | 786 | rdev->devlist_generation++; |
463d0183 JB |
787 | /* can only change netns with wiphy */ |
788 | dev->features |= NETIF_F_NETNS_LOCAL; | |
789 | ||
704232c2 JB |
790 | if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj, |
791 | "phy80211")) { | |
e9c0268f | 792 | pr_err("failed to add phy80211 symlink to netdev!\n"); |
704232c2 | 793 | } |
2a783c13 | 794 | wdev->netdev = dev; |
b23aa676 | 795 | wdev->sme_state = CFG80211_SME_IDLE; |
bc92afd9 | 796 | mutex_unlock(&rdev->devlist_mtx); |
3d23e349 | 797 | #ifdef CONFIG_CFG80211_WEXT |
2a783c13 JB |
798 | wdev->wext.default_key = -1; |
799 | wdev->wext.default_mgmt_key = -1; | |
f2129354 | 800 | wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; |
ffb9eb3d KV |
801 | #endif |
802 | ||
5be83de5 | 803 | if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT) |
ffb9eb3d | 804 | wdev->ps = true; |
5be83de5 | 805 | else |
ffb9eb3d | 806 | wdev->ps = false; |
9043f3b8 JO |
807 | /* allow mac80211 to determine the timeout */ |
808 | wdev->ps_timeout = -1; | |
ffb9eb3d | 809 | |
4890e3be JL |
810 | if (!dev->ethtool_ops) |
811 | dev->ethtool_ops = &cfg80211_ethtool_ops; | |
ad4bb6f8 JB |
812 | |
813 | if ((wdev->iftype == NL80211_IFTYPE_STATION || | |
074ac8df | 814 | wdev->iftype == NL80211_IFTYPE_P2P_CLIENT || |
ad4bb6f8 JB |
815 | wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr) |
816 | dev->priv_flags |= IFF_DONT_BRIDGE; | |
704232c2 | 817 | break; |
04a773ad | 818 | case NETDEV_GOING_DOWN: |
b23aa676 SO |
819 | switch (wdev->iftype) { |
820 | case NL80211_IFTYPE_ADHOC: | |
821 | cfg80211_leave_ibss(rdev, dev, true); | |
822 | break; | |
074ac8df | 823 | case NL80211_IFTYPE_P2P_CLIENT: |
b23aa676 | 824 | case NL80211_IFTYPE_STATION: |
c10841ca | 825 | mutex_lock(&rdev->sched_scan_mtx); |
807f8a8c | 826 | __cfg80211_stop_sched_scan(rdev, false); |
c10841ca | 827 | mutex_unlock(&rdev->sched_scan_mtx); |
807f8a8c | 828 | |
667503dd | 829 | wdev_lock(wdev); |
3d23e349 | 830 | #ifdef CONFIG_CFG80211_WEXT |
f2129354 JB |
831 | kfree(wdev->wext.ie); |
832 | wdev->wext.ie = NULL; | |
833 | wdev->wext.ie_len = 0; | |
0eb14647 | 834 | wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; |
f2129354 | 835 | #endif |
667503dd JB |
836 | __cfg80211_disconnect(rdev, dev, |
837 | WLAN_REASON_DEAUTH_LEAVING, true); | |
19957bb3 | 838 | cfg80211_mlme_down(rdev, dev); |
667503dd | 839 | wdev_unlock(wdev); |
b23aa676 | 840 | break; |
29cbe68c JB |
841 | case NL80211_IFTYPE_MESH_POINT: |
842 | cfg80211_leave_mesh(rdev, dev); | |
843 | break; | |
ac800140 MK |
844 | case NL80211_IFTYPE_AP: |
845 | cfg80211_stop_ap(rdev, dev); | |
846 | break; | |
b23aa676 SO |
847 | default: |
848 | break; | |
849 | } | |
56d1893d | 850 | wdev->beacon_interval = 0; |
01a0ac41 JB |
851 | break; |
852 | case NETDEV_DOWN: | |
dbbae26a | 853 | cfg80211_update_iface_num(rdev, wdev->iftype, -1); |
c5a7e582 | 854 | dev_hold(dev); |
e60d7443 | 855 | queue_work(cfg80211_wq, &wdev->cleanup_work); |
04a773ad JB |
856 | break; |
857 | case NETDEV_UP: | |
ad002395 JB |
858 | /* |
859 | * If we have a really quick DOWN/UP succession we may | |
860 | * have this work still pending ... cancel it and see | |
861 | * if it was pending, in which case we need to account | |
862 | * for some of the work it would have done. | |
863 | */ | |
864 | if (cancel_work_sync(&wdev->cleanup_work)) { | |
865 | mutex_lock(&rdev->devlist_mtx); | |
866 | rdev->opencount--; | |
867 | mutex_unlock(&rdev->devlist_mtx); | |
868 | dev_put(dev); | |
869 | } | |
4290cb4b | 870 | cfg80211_update_iface_num(rdev, wdev->iftype, 1); |
667503dd | 871 | cfg80211_lock_rdev(rdev); |
aee83eaf | 872 | mutex_lock(&rdev->devlist_mtx); |
667503dd | 873 | wdev_lock(wdev); |
f2129354 | 874 | switch (wdev->iftype) { |
29cbe68c | 875 | #ifdef CONFIG_CFG80211_WEXT |
f2129354 | 876 | case NL80211_IFTYPE_ADHOC: |
fffd0934 | 877 | cfg80211_ibss_wext_join(rdev, wdev); |
04a773ad | 878 | break; |
f2129354 | 879 | case NL80211_IFTYPE_STATION: |
fffd0934 | 880 | cfg80211_mgd_wext_connect(rdev, wdev); |
f2129354 | 881 | break; |
29cbe68c | 882 | #endif |
c80d545d | 883 | #ifdef CONFIG_MAC80211_MESH |
29cbe68c | 884 | case NL80211_IFTYPE_MESH_POINT: |
c80d545d JC |
885 | { |
886 | /* backward compat code... */ | |
887 | struct mesh_setup setup; | |
888 | memcpy(&setup, &default_mesh_setup, | |
889 | sizeof(setup)); | |
890 | /* back compat only needed for mesh_id */ | |
891 | setup.mesh_id = wdev->ssid; | |
892 | setup.mesh_id_len = wdev->mesh_id_up_len; | |
893 | if (wdev->mesh_id_up_len) | |
894 | __cfg80211_join_mesh(rdev, dev, | |
895 | &setup, | |
896 | &default_mesh_config); | |
897 | break; | |
898 | } | |
899 | #endif | |
f2129354 | 900 | default: |
04a773ad | 901 | break; |
f2129354 | 902 | } |
667503dd | 903 | wdev_unlock(wdev); |
ad002395 | 904 | rdev->opencount++; |
aee83eaf | 905 | mutex_unlock(&rdev->devlist_mtx); |
667503dd | 906 | cfg80211_unlock_rdev(rdev); |
bf6a0579 JO |
907 | |
908 | /* | |
909 | * Configure power management to the driver here so that its | |
910 | * correctly set also after interface type changes etc. | |
911 | */ | |
5966f2dd EP |
912 | if ((wdev->iftype == NL80211_IFTYPE_STATION || |
913 | wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) && | |
bf6a0579 JO |
914 | rdev->ops->set_power_mgmt) |
915 | if (rdev->ops->set_power_mgmt(wdev->wiphy, dev, | |
916 | wdev->ps, | |
917 | wdev->ps_timeout)) { | |
918 | /* assume this means it's off */ | |
919 | wdev->ps = false; | |
920 | } | |
2a783c13 | 921 | break; |
704232c2 | 922 | case NETDEV_UNREGISTER: |
0ff6ce7b JB |
923 | /* |
924 | * NB: cannot take rdev->mtx here because this may be | |
925 | * called within code protected by it when interfaces | |
926 | * are removed with nl80211. | |
927 | */ | |
704232c2 | 928 | mutex_lock(&rdev->devlist_mtx); |
e40cbdac JB |
929 | /* |
930 | * It is possible to get NETDEV_UNREGISTER | |
931 | * multiple times. To detect that, check | |
932 | * that the interface is still on the list | |
933 | * of registered interfaces, and only then | |
934 | * remove and clean it up. | |
935 | */ | |
2a783c13 | 936 | if (!list_empty(&wdev->list)) { |
704232c2 | 937 | sysfs_remove_link(&dev->dev.kobj, "phy80211"); |
5f2aa25e | 938 | list_del_rcu(&wdev->list); |
f5ea9120 | 939 | rdev->devlist_generation++; |
2e161f78 | 940 | cfg80211_mlme_purge_registrations(wdev); |
3d23e349 | 941 | #ifdef CONFIG_CFG80211_WEXT |
e40cbdac | 942 | kfree(wdev->wext.keys); |
fffd0934 | 943 | #endif |
e40cbdac JB |
944 | } |
945 | mutex_unlock(&rdev->devlist_mtx); | |
5f2aa25e JB |
946 | /* |
947 | * synchronise (so that we won't find this netdev | |
948 | * from other code any more) and then clear the list | |
949 | * head so that the above code can safely check for | |
950 | * !list_empty() to avoid double-cleanup. | |
951 | */ | |
952 | synchronize_rcu(); | |
953 | INIT_LIST_HEAD(&wdev->list); | |
704232c2 | 954 | break; |
1f87f7d3 | 955 | case NETDEV_PRE_UP: |
0b20633d JB |
956 | if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype))) |
957 | return notifier_from_errno(-EOPNOTSUPP); | |
1f87f7d3 JB |
958 | if (rfkill_blocked(rdev->rfkill)) |
959 | return notifier_from_errno(-ERFKILL); | |
e4e32459 | 960 | mutex_lock(&rdev->devlist_mtx); |
7527a782 | 961 | ret = cfg80211_can_add_interface(rdev, wdev->iftype); |
e4e32459 | 962 | mutex_unlock(&rdev->devlist_mtx); |
7527a782 JB |
963 | if (ret) |
964 | return notifier_from_errno(ret); | |
1f87f7d3 | 965 | break; |
704232c2 JB |
966 | } |
967 | ||
1f87f7d3 | 968 | return NOTIFY_DONE; |
704232c2 JB |
969 | } |
970 | ||
971 | static struct notifier_block cfg80211_netdev_notifier = { | |
972 | .notifier_call = cfg80211_netdev_notifier_call, | |
973 | }; | |
974 | ||
463d0183 JB |
975 | static void __net_exit cfg80211_pernet_exit(struct net *net) |
976 | { | |
977 | struct cfg80211_registered_device *rdev; | |
978 | ||
979 | rtnl_lock(); | |
980 | mutex_lock(&cfg80211_mutex); | |
981 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
982 | if (net_eq(wiphy_net(&rdev->wiphy), net)) | |
983 | WARN_ON(cfg80211_switch_netns(rdev, &init_net)); | |
984 | } | |
985 | mutex_unlock(&cfg80211_mutex); | |
986 | rtnl_unlock(); | |
987 | } | |
988 | ||
989 | static struct pernet_operations cfg80211_pernet_ops = { | |
990 | .exit = cfg80211_pernet_exit, | |
991 | }; | |
992 | ||
993 | static int __init cfg80211_init(void) | |
704232c2 | 994 | { |
b2e1b302 LR |
995 | int err; |
996 | ||
463d0183 JB |
997 | err = register_pernet_device(&cfg80211_pernet_ops); |
998 | if (err) | |
999 | goto out_fail_pernet; | |
1000 | ||
b2e1b302 | 1001 | err = wiphy_sysfs_init(); |
704232c2 JB |
1002 | if (err) |
1003 | goto out_fail_sysfs; | |
1004 | ||
1005 | err = register_netdevice_notifier(&cfg80211_netdev_notifier); | |
1006 | if (err) | |
1007 | goto out_fail_notifier; | |
1008 | ||
55682965 JB |
1009 | err = nl80211_init(); |
1010 | if (err) | |
1011 | goto out_fail_nl80211; | |
1012 | ||
704232c2 JB |
1013 | ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); |
1014 | ||
b2e1b302 LR |
1015 | err = regulatory_init(); |
1016 | if (err) | |
1017 | goto out_fail_reg; | |
1018 | ||
e60d7443 AB |
1019 | cfg80211_wq = create_singlethread_workqueue("cfg80211"); |
1020 | if (!cfg80211_wq) | |
1021 | goto out_fail_wq; | |
1022 | ||
704232c2 JB |
1023 | return 0; |
1024 | ||
e60d7443 AB |
1025 | out_fail_wq: |
1026 | regulatory_exit(); | |
b2e1b302 LR |
1027 | out_fail_reg: |
1028 | debugfs_remove(ieee80211_debugfs_dir); | |
55682965 JB |
1029 | out_fail_nl80211: |
1030 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); | |
704232c2 JB |
1031 | out_fail_notifier: |
1032 | wiphy_sysfs_exit(); | |
1033 | out_fail_sysfs: | |
463d0183 JB |
1034 | unregister_pernet_device(&cfg80211_pernet_ops); |
1035 | out_fail_pernet: | |
704232c2 JB |
1036 | return err; |
1037 | } | |
3a462465 | 1038 | subsys_initcall(cfg80211_init); |
704232c2 | 1039 | |
f884e387 | 1040 | static void __exit cfg80211_exit(void) |
704232c2 JB |
1041 | { |
1042 | debugfs_remove(ieee80211_debugfs_dir); | |
55682965 | 1043 | nl80211_exit(); |
704232c2 JB |
1044 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); |
1045 | wiphy_sysfs_exit(); | |
b2e1b302 | 1046 | regulatory_exit(); |
463d0183 | 1047 | unregister_pernet_device(&cfg80211_pernet_ops); |
e60d7443 | 1048 | destroy_workqueue(cfg80211_wq); |
704232c2 JB |
1049 | } |
1050 | module_exit(cfg80211_exit); |