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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 | ||
179 | list_for_each_entry(wdev, &rdev->netdev_list, list) { | |
180 | wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; | |
181 | err = dev_change_net_namespace(wdev->netdev, net, "wlan%d"); | |
182 | if (err) | |
183 | break; | |
184 | wdev->netdev->features |= NETIF_F_NETNS_LOCAL; | |
185 | } | |
186 | ||
187 | if (err) { | |
188 | /* failed -- clean up to old netns */ | |
189 | net = wiphy_net(&rdev->wiphy); | |
190 | ||
191 | list_for_each_entry_continue_reverse(wdev, &rdev->netdev_list, | |
192 | list) { | |
193 | wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; | |
194 | err = dev_change_net_namespace(wdev->netdev, net, | |
195 | "wlan%d"); | |
196 | WARN_ON(err); | |
197 | wdev->netdev->features |= NETIF_F_NETNS_LOCAL; | |
198 | } | |
04600794 JB |
199 | |
200 | return err; | |
463d0183 JB |
201 | } |
202 | ||
203 | wiphy_net_set(&rdev->wiphy, net); | |
204 | ||
04600794 JB |
205 | err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev)); |
206 | WARN_ON(err); | |
207 | ||
208 | return 0; | |
463d0183 JB |
209 | } |
210 | ||
1f87f7d3 JB |
211 | static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data) |
212 | { | |
79c97e97 | 213 | struct cfg80211_registered_device *rdev = data; |
1f87f7d3 | 214 | |
79c97e97 | 215 | rdev->ops->rfkill_poll(&rdev->wiphy); |
1f87f7d3 JB |
216 | } |
217 | ||
218 | static int cfg80211_rfkill_set_block(void *data, bool blocked) | |
219 | { | |
79c97e97 | 220 | struct cfg80211_registered_device *rdev = data; |
1f87f7d3 JB |
221 | struct wireless_dev *wdev; |
222 | ||
223 | if (!blocked) | |
224 | return 0; | |
225 | ||
226 | rtnl_lock(); | |
79c97e97 | 227 | mutex_lock(&rdev->devlist_mtx); |
1f87f7d3 | 228 | |
79c97e97 | 229 | list_for_each_entry(wdev, &rdev->netdev_list, list) |
1f87f7d3 JB |
230 | dev_close(wdev->netdev); |
231 | ||
79c97e97 | 232 | mutex_unlock(&rdev->devlist_mtx); |
1f87f7d3 JB |
233 | rtnl_unlock(); |
234 | ||
235 | return 0; | |
236 | } | |
237 | ||
238 | static void cfg80211_rfkill_sync_work(struct work_struct *work) | |
239 | { | |
79c97e97 | 240 | struct cfg80211_registered_device *rdev; |
1f87f7d3 | 241 | |
79c97e97 JB |
242 | rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync); |
243 | cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill)); | |
1f87f7d3 JB |
244 | } |
245 | ||
667503dd JB |
246 | static void cfg80211_event_work(struct work_struct *work) |
247 | { | |
248 | struct cfg80211_registered_device *rdev; | |
667503dd JB |
249 | |
250 | rdev = container_of(work, struct cfg80211_registered_device, | |
251 | event_work); | |
252 | ||
253 | rtnl_lock(); | |
254 | cfg80211_lock_rdev(rdev); | |
667503dd | 255 | |
3d54d255 | 256 | cfg80211_process_rdev_events(rdev); |
667503dd JB |
257 | cfg80211_unlock_rdev(rdev); |
258 | rtnl_unlock(); | |
259 | } | |
260 | ||
704232c2 JB |
261 | /* exported functions */ |
262 | ||
3dcf670b | 263 | struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv) |
704232c2 | 264 | { |
638af073 | 265 | static int wiphy_counter; |
7623225f JB |
266 | |
267 | struct cfg80211_registered_device *rdev; | |
704232c2 JB |
268 | int alloc_size; |
269 | ||
0b20633d JB |
270 | WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key)); |
271 | WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc)); | |
272 | WARN_ON(ops->connect && !ops->disconnect); | |
273 | WARN_ON(ops->join_ibss && !ops->leave_ibss); | |
274 | WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf); | |
275 | WARN_ON(ops->add_station && !ops->del_station); | |
276 | WARN_ON(ops->add_mpath && !ops->del_mpath); | |
29cbe68c | 277 | WARN_ON(ops->join_mesh && !ops->leave_mesh); |
41ade00f | 278 | |
79c97e97 | 279 | alloc_size = sizeof(*rdev) + sizeof_priv; |
704232c2 | 280 | |
79c97e97 JB |
281 | rdev = kzalloc(alloc_size, GFP_KERNEL); |
282 | if (!rdev) | |
704232c2 JB |
283 | return NULL; |
284 | ||
79c97e97 | 285 | rdev->ops = ops; |
704232c2 | 286 | |
a1794390 | 287 | mutex_lock(&cfg80211_mutex); |
704232c2 | 288 | |
79c97e97 | 289 | rdev->wiphy_idx = wiphy_counter++; |
a4d73ee1 | 290 | |
79c97e97 | 291 | if (unlikely(!wiphy_idx_valid(rdev->wiphy_idx))) { |
638af073 | 292 | wiphy_counter--; |
a1794390 | 293 | mutex_unlock(&cfg80211_mutex); |
7623225f | 294 | /* ugh, wrapped! */ |
79c97e97 | 295 | kfree(rdev); |
704232c2 JB |
296 | return NULL; |
297 | } | |
704232c2 | 298 | |
5a254ffe | 299 | mutex_unlock(&cfg80211_mutex); |
79c97e97 | 300 | |
7623225f JB |
301 | /* give it a proper name */ |
302 | dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx); | |
303 | ||
79c97e97 JB |
304 | mutex_init(&rdev->mtx); |
305 | mutex_init(&rdev->devlist_mtx); | |
c10841ca | 306 | mutex_init(&rdev->sched_scan_mtx); |
79c97e97 JB |
307 | INIT_LIST_HEAD(&rdev->netdev_list); |
308 | spin_lock_init(&rdev->bss_lock); | |
309 | INIT_LIST_HEAD(&rdev->bss_list); | |
310 | INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done); | |
807f8a8c | 311 | INIT_WORK(&rdev->sched_scan_results_wk, __cfg80211_sched_scan_results); |
3d23e349 JB |
312 | #ifdef CONFIG_CFG80211_WEXT |
313 | rdev->wiphy.wext = &cfg80211_wext_handler; | |
314 | #endif | |
315 | ||
79c97e97 JB |
316 | device_initialize(&rdev->wiphy.dev); |
317 | rdev->wiphy.dev.class = &ieee80211_class; | |
318 | rdev->wiphy.dev.platform_data = rdev; | |
319 | ||
5be83de5 JB |
320 | #ifdef CONFIG_CFG80211_DEFAULT_PS |
321 | rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; | |
322 | #endif | |
16cb9d42 | 323 | |
463d0183 JB |
324 | wiphy_net_set(&rdev->wiphy, &init_net); |
325 | ||
79c97e97 JB |
326 | rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block; |
327 | rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev), | |
328 | &rdev->wiphy.dev, RFKILL_TYPE_WLAN, | |
329 | &rdev->rfkill_ops, rdev); | |
330 | ||
331 | if (!rdev->rfkill) { | |
332 | kfree(rdev); | |
1f87f7d3 JB |
333 | return NULL; |
334 | } | |
335 | ||
79c97e97 JB |
336 | INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work); |
337 | INIT_WORK(&rdev->conn_work, cfg80211_conn_work); | |
338 | INIT_WORK(&rdev->event_work, cfg80211_event_work); | |
1f87f7d3 | 339 | |
ad002395 JB |
340 | init_waitqueue_head(&rdev->dev_wait); |
341 | ||
b9a5f8ca JM |
342 | /* |
343 | * Initialize wiphy parameters to IEEE 802.11 MIB default values. | |
344 | * Fragmentation and RTS threshold are disabled by default with the | |
345 | * special -1 value. | |
346 | */ | |
79c97e97 JB |
347 | rdev->wiphy.retry_short = 7; |
348 | rdev->wiphy.retry_long = 4; | |
349 | rdev->wiphy.frag_threshold = (u32) -1; | |
350 | rdev->wiphy.rts_threshold = (u32) -1; | |
81077e82 | 351 | rdev->wiphy.coverage_class = 0; |
b9a5f8ca | 352 | |
79c97e97 | 353 | return &rdev->wiphy; |
704232c2 JB |
354 | } |
355 | EXPORT_SYMBOL(wiphy_new); | |
356 | ||
7527a782 JB |
357 | static int wiphy_verify_combinations(struct wiphy *wiphy) |
358 | { | |
359 | const struct ieee80211_iface_combination *c; | |
360 | int i, j; | |
361 | ||
7527a782 JB |
362 | for (i = 0; i < wiphy->n_iface_combinations; i++) { |
363 | u32 cnt = 0; | |
364 | u16 all_iftypes = 0; | |
365 | ||
366 | c = &wiphy->iface_combinations[i]; | |
367 | ||
368 | /* Combinations with just one interface aren't real */ | |
369 | if (WARN_ON(c->max_interfaces < 2)) | |
370 | return -EINVAL; | |
371 | ||
372 | /* Need at least one channel */ | |
373 | if (WARN_ON(!c->num_different_channels)) | |
374 | return -EINVAL; | |
375 | ||
d4e50c59 MK |
376 | /* |
377 | * Put a sane limit on maximum number of different | |
378 | * channels to simplify channel accounting code. | |
379 | */ | |
380 | if (WARN_ON(c->num_different_channels > | |
381 | CFG80211_MAX_NUM_DIFFERENT_CHANNELS)) | |
382 | return -EINVAL; | |
383 | ||
7527a782 JB |
384 | if (WARN_ON(!c->n_limits)) |
385 | return -EINVAL; | |
386 | ||
387 | for (j = 0; j < c->n_limits; j++) { | |
388 | u16 types = c->limits[j].types; | |
389 | ||
390 | /* | |
391 | * interface types shouldn't overlap, this is | |
392 | * used in cfg80211_can_change_interface() | |
393 | */ | |
394 | if (WARN_ON(types & all_iftypes)) | |
395 | return -EINVAL; | |
396 | all_iftypes |= types; | |
397 | ||
398 | if (WARN_ON(!c->limits[j].max)) | |
399 | return -EINVAL; | |
400 | ||
401 | /* Shouldn't list software iftypes in combinations! */ | |
402 | if (WARN_ON(wiphy->software_iftypes & types)) | |
403 | return -EINVAL; | |
404 | ||
405 | cnt += c->limits[j].max; | |
406 | /* | |
407 | * Don't advertise an unsupported type | |
408 | * in a combination. | |
409 | */ | |
410 | if (WARN_ON((wiphy->interface_modes & types) != types)) | |
411 | return -EINVAL; | |
412 | } | |
413 | ||
414 | /* You can't even choose that many! */ | |
415 | if (WARN_ON(cnt < c->max_interfaces)) | |
416 | return -EINVAL; | |
417 | } | |
418 | ||
419 | return 0; | |
420 | } | |
421 | ||
704232c2 JB |
422 | int wiphy_register(struct wiphy *wiphy) |
423 | { | |
79c97e97 | 424 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
704232c2 | 425 | int res; |
8318d78a JB |
426 | enum ieee80211_band band; |
427 | struct ieee80211_supported_band *sband; | |
428 | bool have_band = false; | |
429 | int i; | |
f59ac048 LR |
430 | u16 ifmodes = wiphy->interface_modes; |
431 | ||
dfb89c56 | 432 | #ifdef CONFIG_PM |
77dbbb13 JB |
433 | if (WARN_ON((wiphy->wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) && |
434 | !(wiphy->wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY))) | |
435 | return -EINVAL; | |
dfb89c56 | 436 | #endif |
77dbbb13 | 437 | |
562a7480 JB |
438 | if (WARN_ON(wiphy->ap_sme_capa && |
439 | !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME))) | |
440 | return -EINVAL; | |
441 | ||
ef15aac6 JB |
442 | if (WARN_ON(wiphy->addresses && !wiphy->n_addresses)) |
443 | return -EINVAL; | |
444 | ||
445 | if (WARN_ON(wiphy->addresses && | |
446 | !is_zero_ether_addr(wiphy->perm_addr) && | |
447 | memcmp(wiphy->perm_addr, wiphy->addresses[0].addr, | |
448 | ETH_ALEN))) | |
449 | return -EINVAL; | |
450 | ||
451 | if (wiphy->addresses) | |
452 | memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN); | |
453 | ||
f59ac048 LR |
454 | /* sanity check ifmodes */ |
455 | WARN_ON(!ifmodes); | |
2e161f78 | 456 | ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1; |
f59ac048 LR |
457 | if (WARN_ON(ifmodes != wiphy->interface_modes)) |
458 | wiphy->interface_modes = ifmodes; | |
8318d78a | 459 | |
7527a782 JB |
460 | res = wiphy_verify_combinations(wiphy); |
461 | if (res) | |
462 | return res; | |
463 | ||
8318d78a JB |
464 | /* sanity check supported bands/channels */ |
465 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
466 | sband = wiphy->bands[band]; | |
467 | if (!sband) | |
468 | continue; | |
469 | ||
470 | sband->band = band; | |
471 | ||
881d948c JB |
472 | if (WARN_ON(!sband->n_channels || !sband->n_bitrates)) |
473 | return -EINVAL; | |
474 | ||
40db6c77 AK |
475 | /* |
476 | * Since cfg80211_disable_40mhz_24ghz is global, we can | |
477 | * modify the sband's ht data even if the driver uses a | |
478 | * global structure for that. | |
479 | */ | |
480 | if (cfg80211_disable_40mhz_24ghz && | |
481 | band == IEEE80211_BAND_2GHZ && | |
482 | sband->ht_cap.ht_supported) { | |
483 | sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
484 | sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40; | |
485 | } | |
486 | ||
881d948c JB |
487 | /* |
488 | * Since we use a u32 for rate bitmaps in | |
489 | * ieee80211_get_response_rate, we cannot | |
490 | * have more than 32 legacy rates. | |
491 | */ | |
492 | if (WARN_ON(sband->n_bitrates > 32)) | |
8318d78a | 493 | return -EINVAL; |
8318d78a JB |
494 | |
495 | for (i = 0; i < sband->n_channels; i++) { | |
496 | sband->channels[i].orig_flags = | |
497 | sband->channels[i].flags; | |
498 | sband->channels[i].orig_mag = | |
499 | sband->channels[i].max_antenna_gain; | |
500 | sband->channels[i].orig_mpwr = | |
501 | sband->channels[i].max_power; | |
502 | sband->channels[i].band = band; | |
503 | } | |
504 | ||
505 | have_band = true; | |
506 | } | |
507 | ||
508 | if (!have_band) { | |
509 | WARN_ON(1); | |
510 | return -EINVAL; | |
511 | } | |
512 | ||
dfb89c56 | 513 | #ifdef CONFIG_PM |
ff1b6e69 JB |
514 | if (rdev->wiphy.wowlan.n_patterns) { |
515 | if (WARN_ON(!rdev->wiphy.wowlan.pattern_min_len || | |
516 | rdev->wiphy.wowlan.pattern_min_len > | |
517 | rdev->wiphy.wowlan.pattern_max_len)) | |
518 | return -EINVAL; | |
519 | } | |
dfb89c56 | 520 | #endif |
ff1b6e69 | 521 | |
8318d78a JB |
522 | /* check and set up bitrates */ |
523 | ieee80211_set_bitrate_flags(wiphy); | |
524 | ||
5a652052 MB |
525 | mutex_lock(&cfg80211_mutex); |
526 | ||
79c97e97 | 527 | res = device_add(&rdev->wiphy.dev); |
c3d34d5d JL |
528 | if (res) { |
529 | mutex_unlock(&cfg80211_mutex); | |
530 | return res; | |
531 | } | |
1f87f7d3 | 532 | |
2f0accc1 | 533 | /* set up regulatory info */ |
eac03e38 | 534 | regulatory_update(wiphy, NL80211_REGDOM_SET_BY_CORE); |
2f0accc1 | 535 | |
5f2aa25e | 536 | list_add_rcu(&rdev->list, &cfg80211_rdev_list); |
f5ea9120 | 537 | cfg80211_rdev_list_generation++; |
704232c2 JB |
538 | |
539 | /* add to debugfs */ | |
79c97e97 JB |
540 | rdev->wiphy.debugfsdir = |
541 | debugfs_create_dir(wiphy_name(&rdev->wiphy), | |
704232c2 | 542 | ieee80211_debugfs_dir); |
79c97e97 JB |
543 | if (IS_ERR(rdev->wiphy.debugfsdir)) |
544 | rdev->wiphy.debugfsdir = NULL; | |
704232c2 | 545 | |
5be83de5 | 546 | if (wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) { |
73d54c9e LR |
547 | struct regulatory_request request; |
548 | ||
549 | request.wiphy_idx = get_wiphy_idx(wiphy); | |
550 | request.initiator = NL80211_REGDOM_SET_BY_DRIVER; | |
551 | request.alpha2[0] = '9'; | |
552 | request.alpha2[1] = '9'; | |
553 | ||
554 | nl80211_send_reg_change_event(&request); | |
555 | } | |
556 | ||
79c97e97 | 557 | cfg80211_debugfs_rdev_add(rdev); |
5a652052 | 558 | mutex_unlock(&cfg80211_mutex); |
1ac61302 | 559 | |
c3d34d5d JL |
560 | /* |
561 | * due to a locking dependency this has to be outside of the | |
562 | * cfg80211_mutex lock | |
563 | */ | |
564 | res = rfkill_register(rdev->rfkill); | |
565 | if (res) | |
566 | goto out_rm_dev; | |
567 | ||
ecb44335 SG |
568 | rtnl_lock(); |
569 | rdev->wiphy.registered = true; | |
570 | rtnl_unlock(); | |
2f0accc1 | 571 | return 0; |
1f87f7d3 | 572 | |
5a652052 | 573 | out_rm_dev: |
79c97e97 | 574 | device_del(&rdev->wiphy.dev); |
704232c2 JB |
575 | return res; |
576 | } | |
577 | EXPORT_SYMBOL(wiphy_register); | |
578 | ||
1f87f7d3 JB |
579 | void wiphy_rfkill_start_polling(struct wiphy *wiphy) |
580 | { | |
79c97e97 | 581 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 582 | |
79c97e97 | 583 | if (!rdev->ops->rfkill_poll) |
1f87f7d3 | 584 | return; |
79c97e97 JB |
585 | rdev->rfkill_ops.poll = cfg80211_rfkill_poll; |
586 | rfkill_resume_polling(rdev->rfkill); | |
1f87f7d3 JB |
587 | } |
588 | EXPORT_SYMBOL(wiphy_rfkill_start_polling); | |
589 | ||
590 | void wiphy_rfkill_stop_polling(struct wiphy *wiphy) | |
591 | { | |
79c97e97 | 592 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 593 | |
79c97e97 | 594 | rfkill_pause_polling(rdev->rfkill); |
1f87f7d3 JB |
595 | } |
596 | EXPORT_SYMBOL(wiphy_rfkill_stop_polling); | |
597 | ||
704232c2 JB |
598 | void wiphy_unregister(struct wiphy *wiphy) |
599 | { | |
79c97e97 | 600 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
704232c2 | 601 | |
ecb44335 SG |
602 | rtnl_lock(); |
603 | rdev->wiphy.registered = false; | |
604 | rtnl_unlock(); | |
605 | ||
79c97e97 | 606 | rfkill_unregister(rdev->rfkill); |
1f87f7d3 | 607 | |
f16bfc1c | 608 | /* protect the device list */ |
a1794390 | 609 | mutex_lock(&cfg80211_mutex); |
704232c2 | 610 | |
ad002395 JB |
611 | wait_event(rdev->dev_wait, ({ |
612 | int __count; | |
613 | mutex_lock(&rdev->devlist_mtx); | |
614 | __count = rdev->opencount; | |
615 | mutex_unlock(&rdev->devlist_mtx); | |
c4f60846 | 616 | __count == 0; })); |
ad002395 JB |
617 | |
618 | mutex_lock(&rdev->devlist_mtx); | |
79c97e97 | 619 | BUG_ON(!list_empty(&rdev->netdev_list)); |
ad002395 JB |
620 | mutex_unlock(&rdev->devlist_mtx); |
621 | ||
622 | /* | |
623 | * First remove the hardware from everywhere, this makes | |
624 | * it impossible to find from userspace. | |
625 | */ | |
7bcfaf2f | 626 | debugfs_remove_recursive(rdev->wiphy.debugfsdir); |
5f2aa25e JB |
627 | list_del_rcu(&rdev->list); |
628 | synchronize_rcu(); | |
f16bfc1c JB |
629 | |
630 | /* | |
79c97e97 | 631 | * Try to grab rdev->mtx. If a command is still in progress, |
f16bfc1c JB |
632 | * hopefully the driver will refuse it since it's tearing |
633 | * down the device already. We wait for this command to complete | |
634 | * before unlinking the item from the list. | |
635 | * Note: as codified by the BUG_ON above we cannot get here if | |
ad002395 JB |
636 | * a virtual interface is still present. Hence, we can only get |
637 | * to lock contention here if userspace issues a command that | |
638 | * identified the hardware by wiphy index. | |
f16bfc1c | 639 | */ |
0ff6ce7b | 640 | cfg80211_lock_rdev(rdev); |
ad002395 | 641 | /* nothing */ |
0ff6ce7b | 642 | cfg80211_unlock_rdev(rdev); |
704232c2 | 643 | |
3f2355cb LR |
644 | /* If this device got a regulatory hint tell core its |
645 | * free to listen now to a new shiny device regulatory hint */ | |
646 | reg_device_remove(wiphy); | |
647 | ||
f5ea9120 | 648 | cfg80211_rdev_list_generation++; |
79c97e97 | 649 | device_del(&rdev->wiphy.dev); |
704232c2 | 650 | |
a1794390 | 651 | mutex_unlock(&cfg80211_mutex); |
6682588a | 652 | |
36e6fea8 | 653 | flush_work(&rdev->scan_done_wk); |
6682588a | 654 | cancel_work_sync(&rdev->conn_work); |
6682588a | 655 | flush_work(&rdev->event_work); |
6d52563f JB |
656 | |
657 | if (rdev->wowlan && rdev->ops->set_wakeup) | |
658 | rdev->ops->set_wakeup(&rdev->wiphy, false); | |
659 | cfg80211_rdev_free_wowlan(rdev); | |
704232c2 JB |
660 | } |
661 | EXPORT_SYMBOL(wiphy_unregister); | |
662 | ||
79c97e97 | 663 | void cfg80211_dev_free(struct cfg80211_registered_device *rdev) |
704232c2 | 664 | { |
2a519311 | 665 | struct cfg80211_internal_bss *scan, *tmp; |
79c97e97 JB |
666 | rfkill_destroy(rdev->rfkill); |
667 | mutex_destroy(&rdev->mtx); | |
668 | mutex_destroy(&rdev->devlist_mtx); | |
c10841ca | 669 | mutex_destroy(&rdev->sched_scan_mtx); |
79c97e97 | 670 | list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list) |
78c1c7e1 | 671 | cfg80211_put_bss(&scan->pub); |
79c97e97 | 672 | kfree(rdev); |
704232c2 JB |
673 | } |
674 | ||
675 | void wiphy_free(struct wiphy *wiphy) | |
676 | { | |
677 | put_device(&wiphy->dev); | |
678 | } | |
679 | EXPORT_SYMBOL(wiphy_free); | |
680 | ||
1f87f7d3 JB |
681 | void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked) |
682 | { | |
79c97e97 | 683 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
1f87f7d3 | 684 | |
79c97e97 JB |
685 | if (rfkill_set_hw_state(rdev->rfkill, blocked)) |
686 | schedule_work(&rdev->rfkill_sync); | |
1f87f7d3 JB |
687 | } |
688 | EXPORT_SYMBOL(wiphy_rfkill_set_hw_state); | |
689 | ||
ad002395 JB |
690 | static void wdev_cleanup_work(struct work_struct *work) |
691 | { | |
692 | struct wireless_dev *wdev; | |
693 | struct cfg80211_registered_device *rdev; | |
694 | ||
695 | wdev = container_of(work, struct wireless_dev, cleanup_work); | |
696 | rdev = wiphy_to_dev(wdev->wiphy); | |
697 | ||
698 | cfg80211_lock_rdev(rdev); | |
699 | ||
700 | if (WARN_ON(rdev->scan_req && rdev->scan_req->dev == wdev->netdev)) { | |
701 | rdev->scan_req->aborted = true; | |
01a0ac41 | 702 | ___cfg80211_scan_done(rdev, true); |
ad002395 JB |
703 | } |
704 | ||
c10841ca LC |
705 | cfg80211_unlock_rdev(rdev); |
706 | ||
707 | mutex_lock(&rdev->sched_scan_mtx); | |
708 | ||
807f8a8c LC |
709 | if (WARN_ON(rdev->sched_scan_req && |
710 | rdev->sched_scan_req->dev == wdev->netdev)) { | |
711 | __cfg80211_stop_sched_scan(rdev, false); | |
712 | } | |
713 | ||
c10841ca | 714 | mutex_unlock(&rdev->sched_scan_mtx); |
ad002395 JB |
715 | |
716 | mutex_lock(&rdev->devlist_mtx); | |
717 | rdev->opencount--; | |
718 | mutex_unlock(&rdev->devlist_mtx); | |
719 | wake_up(&rdev->dev_wait); | |
720 | ||
721 | dev_put(wdev->netdev); | |
722 | } | |
723 | ||
053a93dd MH |
724 | static struct device_type wiphy_type = { |
725 | .name = "wlan", | |
726 | }; | |
727 | ||
a69b40a9 MK |
728 | static struct ieee80211_channel * |
729 | cfg80211_get_any_chan(struct cfg80211_registered_device *rdev) | |
730 | { | |
731 | struct ieee80211_supported_band *sband; | |
732 | int i; | |
733 | ||
734 | for (i = 0; i < IEEE80211_NUM_BANDS; i++) { | |
735 | sband = rdev->wiphy.bands[i]; | |
736 | if (sband && sband->n_channels > 0) | |
737 | return &sband->channels[0]; | |
738 | } | |
739 | ||
740 | return NULL; | |
741 | } | |
742 | ||
743 | static void cfg80211_init_mon_chan(struct cfg80211_registered_device *rdev) | |
744 | { | |
745 | struct ieee80211_channel *chan; | |
746 | ||
747 | chan = cfg80211_get_any_chan(rdev); | |
748 | if (WARN_ON(!chan)) | |
749 | return; | |
750 | ||
751 | mutex_lock(&rdev->devlist_mtx); | |
752 | WARN_ON(cfg80211_set_monitor_channel(rdev, chan->center_freq, | |
753 | NL80211_CHAN_NO_HT)); | |
754 | mutex_unlock(&rdev->devlist_mtx); | |
755 | } | |
756 | ||
dbbae26a MK |
757 | void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, |
758 | enum nl80211_iftype iftype, int num) | |
759 | { | |
760 | bool has_monitors_only_old = cfg80211_has_monitors_only(rdev); | |
761 | bool has_monitors_only_new; | |
762 | ||
763 | ASSERT_RDEV_LOCK(rdev); | |
764 | ||
765 | rdev->num_running_ifaces += num; | |
766 | if (iftype == NL80211_IFTYPE_MONITOR) | |
767 | rdev->num_running_monitor_ifaces += num; | |
768 | ||
769 | has_monitors_only_new = cfg80211_has_monitors_only(rdev); | |
b78e8cea | 770 | if (has_monitors_only_new != has_monitors_only_old) { |
dbbae26a MK |
771 | rdev->ops->set_monitor_enabled(&rdev->wiphy, |
772 | has_monitors_only_new); | |
b78e8cea MK |
773 | |
774 | if (!has_monitors_only_new) { | |
775 | rdev->monitor_channel = NULL; | |
776 | rdev->monitor_channel_type = NL80211_CHAN_NO_HT; | |
a69b40a9 MK |
777 | } else { |
778 | cfg80211_init_mon_chan(rdev); | |
b78e8cea MK |
779 | } |
780 | } | |
dbbae26a MK |
781 | } |
782 | ||
c4f60846 | 783 | static int cfg80211_netdev_notifier_call(struct notifier_block *nb, |
704232c2 JB |
784 | unsigned long state, |
785 | void *ndev) | |
786 | { | |
787 | struct net_device *dev = ndev; | |
2a783c13 | 788 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
704232c2 | 789 | struct cfg80211_registered_device *rdev; |
7527a782 | 790 | int ret; |
704232c2 | 791 | |
2a783c13 | 792 | if (!wdev) |
1f87f7d3 | 793 | return NOTIFY_DONE; |
704232c2 | 794 | |
2a783c13 | 795 | rdev = wiphy_to_dev(wdev->wiphy); |
704232c2 | 796 | |
2a783c13 | 797 | WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); |
60719ffd | 798 | |
704232c2 | 799 | switch (state) { |
053a93dd MH |
800 | case NETDEV_POST_INIT: |
801 | SET_NETDEV_DEVTYPE(dev, &wiphy_type); | |
802 | break; | |
704232c2 | 803 | case NETDEV_REGISTER: |
0ff6ce7b JB |
804 | /* |
805 | * NB: cannot take rdev->mtx here because this may be | |
806 | * called within code protected by it when interfaces | |
807 | * are added with nl80211. | |
808 | */ | |
667503dd | 809 | mutex_init(&wdev->mtx); |
ad002395 | 810 | INIT_WORK(&wdev->cleanup_work, wdev_cleanup_work); |
667503dd JB |
811 | INIT_LIST_HEAD(&wdev->event_list); |
812 | spin_lock_init(&wdev->event_lock); | |
2e161f78 JB |
813 | INIT_LIST_HEAD(&wdev->mgmt_registrations); |
814 | spin_lock_init(&wdev->mgmt_registrations_lock); | |
026331c4 | 815 | |
704232c2 | 816 | mutex_lock(&rdev->devlist_mtx); |
5f2aa25e | 817 | list_add_rcu(&wdev->list, &rdev->netdev_list); |
f5ea9120 | 818 | rdev->devlist_generation++; |
463d0183 JB |
819 | /* can only change netns with wiphy */ |
820 | dev->features |= NETIF_F_NETNS_LOCAL; | |
821 | ||
704232c2 JB |
822 | if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj, |
823 | "phy80211")) { | |
e9c0268f | 824 | pr_err("failed to add phy80211 symlink to netdev!\n"); |
704232c2 | 825 | } |
2a783c13 | 826 | wdev->netdev = dev; |
b23aa676 | 827 | wdev->sme_state = CFG80211_SME_IDLE; |
bc92afd9 | 828 | mutex_unlock(&rdev->devlist_mtx); |
3d23e349 | 829 | #ifdef CONFIG_CFG80211_WEXT |
2a783c13 JB |
830 | wdev->wext.default_key = -1; |
831 | wdev->wext.default_mgmt_key = -1; | |
f2129354 | 832 | wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; |
ffb9eb3d KV |
833 | #endif |
834 | ||
5be83de5 | 835 | if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT) |
ffb9eb3d | 836 | wdev->ps = true; |
5be83de5 | 837 | else |
ffb9eb3d | 838 | wdev->ps = false; |
9043f3b8 JO |
839 | /* allow mac80211 to determine the timeout */ |
840 | wdev->ps_timeout = -1; | |
ffb9eb3d | 841 | |
4890e3be JL |
842 | if (!dev->ethtool_ops) |
843 | dev->ethtool_ops = &cfg80211_ethtool_ops; | |
ad4bb6f8 JB |
844 | |
845 | if ((wdev->iftype == NL80211_IFTYPE_STATION || | |
074ac8df | 846 | wdev->iftype == NL80211_IFTYPE_P2P_CLIENT || |
ad4bb6f8 JB |
847 | wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr) |
848 | dev->priv_flags |= IFF_DONT_BRIDGE; | |
704232c2 | 849 | break; |
04a773ad | 850 | case NETDEV_GOING_DOWN: |
b23aa676 SO |
851 | switch (wdev->iftype) { |
852 | case NL80211_IFTYPE_ADHOC: | |
853 | cfg80211_leave_ibss(rdev, dev, true); | |
854 | break; | |
074ac8df | 855 | case NL80211_IFTYPE_P2P_CLIENT: |
b23aa676 | 856 | case NL80211_IFTYPE_STATION: |
c10841ca | 857 | mutex_lock(&rdev->sched_scan_mtx); |
807f8a8c | 858 | __cfg80211_stop_sched_scan(rdev, false); |
c10841ca | 859 | mutex_unlock(&rdev->sched_scan_mtx); |
807f8a8c | 860 | |
667503dd | 861 | wdev_lock(wdev); |
3d23e349 | 862 | #ifdef CONFIG_CFG80211_WEXT |
f2129354 JB |
863 | kfree(wdev->wext.ie); |
864 | wdev->wext.ie = NULL; | |
865 | wdev->wext.ie_len = 0; | |
0eb14647 | 866 | wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; |
f2129354 | 867 | #endif |
667503dd JB |
868 | __cfg80211_disconnect(rdev, dev, |
869 | WLAN_REASON_DEAUTH_LEAVING, true); | |
19957bb3 | 870 | cfg80211_mlme_down(rdev, dev); |
667503dd | 871 | wdev_unlock(wdev); |
b23aa676 | 872 | break; |
29cbe68c JB |
873 | case NL80211_IFTYPE_MESH_POINT: |
874 | cfg80211_leave_mesh(rdev, dev); | |
875 | break; | |
ac800140 MK |
876 | case NL80211_IFTYPE_AP: |
877 | cfg80211_stop_ap(rdev, dev); | |
878 | break; | |
b23aa676 SO |
879 | default: |
880 | break; | |
881 | } | |
56d1893d | 882 | wdev->beacon_interval = 0; |
01a0ac41 JB |
883 | break; |
884 | case NETDEV_DOWN: | |
ad002395 | 885 | dev_hold(dev); |
dbbae26a MK |
886 | cfg80211_lock_rdev(rdev); |
887 | cfg80211_update_iface_num(rdev, wdev->iftype, -1); | |
888 | cfg80211_unlock_rdev(rdev); | |
e60d7443 | 889 | queue_work(cfg80211_wq, &wdev->cleanup_work); |
04a773ad JB |
890 | break; |
891 | case NETDEV_UP: | |
ad002395 JB |
892 | /* |
893 | * If we have a really quick DOWN/UP succession we may | |
894 | * have this work still pending ... cancel it and see | |
895 | * if it was pending, in which case we need to account | |
896 | * for some of the work it would have done. | |
897 | */ | |
898 | if (cancel_work_sync(&wdev->cleanup_work)) { | |
899 | mutex_lock(&rdev->devlist_mtx); | |
900 | rdev->opencount--; | |
901 | mutex_unlock(&rdev->devlist_mtx); | |
902 | dev_put(dev); | |
903 | } | |
667503dd | 904 | cfg80211_lock_rdev(rdev); |
aee83eaf | 905 | mutex_lock(&rdev->devlist_mtx); |
667503dd | 906 | wdev_lock(wdev); |
f2129354 | 907 | switch (wdev->iftype) { |
29cbe68c | 908 | #ifdef CONFIG_CFG80211_WEXT |
f2129354 | 909 | case NL80211_IFTYPE_ADHOC: |
fffd0934 | 910 | cfg80211_ibss_wext_join(rdev, wdev); |
04a773ad | 911 | break; |
f2129354 | 912 | case NL80211_IFTYPE_STATION: |
fffd0934 | 913 | cfg80211_mgd_wext_connect(rdev, wdev); |
f2129354 | 914 | break; |
29cbe68c | 915 | #endif |
c80d545d | 916 | #ifdef CONFIG_MAC80211_MESH |
29cbe68c | 917 | case NL80211_IFTYPE_MESH_POINT: |
c80d545d JC |
918 | { |
919 | /* backward compat code... */ | |
920 | struct mesh_setup setup; | |
921 | memcpy(&setup, &default_mesh_setup, | |
922 | sizeof(setup)); | |
923 | /* back compat only needed for mesh_id */ | |
924 | setup.mesh_id = wdev->ssid; | |
925 | setup.mesh_id_len = wdev->mesh_id_up_len; | |
926 | if (wdev->mesh_id_up_len) | |
927 | __cfg80211_join_mesh(rdev, dev, | |
928 | &setup, | |
929 | &default_mesh_config); | |
930 | break; | |
931 | } | |
932 | #endif | |
f2129354 | 933 | default: |
04a773ad | 934 | break; |
f2129354 | 935 | } |
667503dd | 936 | wdev_unlock(wdev); |
ad002395 | 937 | rdev->opencount++; |
aee83eaf | 938 | mutex_unlock(&rdev->devlist_mtx); |
667503dd | 939 | cfg80211_unlock_rdev(rdev); |
bf6a0579 JO |
940 | |
941 | /* | |
942 | * Configure power management to the driver here so that its | |
943 | * correctly set also after interface type changes etc. | |
944 | */ | |
5966f2dd EP |
945 | if ((wdev->iftype == NL80211_IFTYPE_STATION || |
946 | wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) && | |
bf6a0579 JO |
947 | rdev->ops->set_power_mgmt) |
948 | if (rdev->ops->set_power_mgmt(wdev->wiphy, dev, | |
949 | wdev->ps, | |
950 | wdev->ps_timeout)) { | |
951 | /* assume this means it's off */ | |
952 | wdev->ps = false; | |
953 | } | |
2a783c13 | 954 | break; |
704232c2 | 955 | case NETDEV_UNREGISTER: |
0ff6ce7b JB |
956 | /* |
957 | * NB: cannot take rdev->mtx here because this may be | |
958 | * called within code protected by it when interfaces | |
959 | * are removed with nl80211. | |
960 | */ | |
704232c2 | 961 | mutex_lock(&rdev->devlist_mtx); |
e40cbdac JB |
962 | /* |
963 | * It is possible to get NETDEV_UNREGISTER | |
964 | * multiple times. To detect that, check | |
965 | * that the interface is still on the list | |
966 | * of registered interfaces, and only then | |
967 | * remove and clean it up. | |
968 | */ | |
2a783c13 | 969 | if (!list_empty(&wdev->list)) { |
704232c2 | 970 | sysfs_remove_link(&dev->dev.kobj, "phy80211"); |
5f2aa25e | 971 | list_del_rcu(&wdev->list); |
f5ea9120 | 972 | rdev->devlist_generation++; |
2e161f78 | 973 | cfg80211_mlme_purge_registrations(wdev); |
3d23e349 | 974 | #ifdef CONFIG_CFG80211_WEXT |
e40cbdac | 975 | kfree(wdev->wext.keys); |
fffd0934 | 976 | #endif |
e40cbdac JB |
977 | } |
978 | mutex_unlock(&rdev->devlist_mtx); | |
5f2aa25e JB |
979 | /* |
980 | * synchronise (so that we won't find this netdev | |
981 | * from other code any more) and then clear the list | |
982 | * head so that the above code can safely check for | |
983 | * !list_empty() to avoid double-cleanup. | |
984 | */ | |
985 | synchronize_rcu(); | |
986 | INIT_LIST_HEAD(&wdev->list); | |
704232c2 | 987 | break; |
1f87f7d3 | 988 | case NETDEV_PRE_UP: |
0b20633d JB |
989 | if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype))) |
990 | return notifier_from_errno(-EOPNOTSUPP); | |
1f87f7d3 JB |
991 | if (rfkill_blocked(rdev->rfkill)) |
992 | return notifier_from_errno(-ERFKILL); | |
7527a782 JB |
993 | ret = cfg80211_can_add_interface(rdev, wdev->iftype); |
994 | if (ret) | |
995 | return notifier_from_errno(ret); | |
dbbae26a MK |
996 | cfg80211_lock_rdev(rdev); |
997 | cfg80211_update_iface_num(rdev, wdev->iftype, 1); | |
998 | cfg80211_unlock_rdev(rdev); | |
1f87f7d3 | 999 | break; |
704232c2 JB |
1000 | } |
1001 | ||
1f87f7d3 | 1002 | return NOTIFY_DONE; |
704232c2 JB |
1003 | } |
1004 | ||
1005 | static struct notifier_block cfg80211_netdev_notifier = { | |
1006 | .notifier_call = cfg80211_netdev_notifier_call, | |
1007 | }; | |
1008 | ||
463d0183 JB |
1009 | static void __net_exit cfg80211_pernet_exit(struct net *net) |
1010 | { | |
1011 | struct cfg80211_registered_device *rdev; | |
1012 | ||
1013 | rtnl_lock(); | |
1014 | mutex_lock(&cfg80211_mutex); | |
1015 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { | |
1016 | if (net_eq(wiphy_net(&rdev->wiphy), net)) | |
1017 | WARN_ON(cfg80211_switch_netns(rdev, &init_net)); | |
1018 | } | |
1019 | mutex_unlock(&cfg80211_mutex); | |
1020 | rtnl_unlock(); | |
1021 | } | |
1022 | ||
1023 | static struct pernet_operations cfg80211_pernet_ops = { | |
1024 | .exit = cfg80211_pernet_exit, | |
1025 | }; | |
1026 | ||
1027 | static int __init cfg80211_init(void) | |
704232c2 | 1028 | { |
b2e1b302 LR |
1029 | int err; |
1030 | ||
463d0183 JB |
1031 | err = register_pernet_device(&cfg80211_pernet_ops); |
1032 | if (err) | |
1033 | goto out_fail_pernet; | |
1034 | ||
b2e1b302 | 1035 | err = wiphy_sysfs_init(); |
704232c2 JB |
1036 | if (err) |
1037 | goto out_fail_sysfs; | |
1038 | ||
1039 | err = register_netdevice_notifier(&cfg80211_netdev_notifier); | |
1040 | if (err) | |
1041 | goto out_fail_notifier; | |
1042 | ||
55682965 JB |
1043 | err = nl80211_init(); |
1044 | if (err) | |
1045 | goto out_fail_nl80211; | |
1046 | ||
704232c2 JB |
1047 | ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); |
1048 | ||
b2e1b302 LR |
1049 | err = regulatory_init(); |
1050 | if (err) | |
1051 | goto out_fail_reg; | |
1052 | ||
e60d7443 AB |
1053 | cfg80211_wq = create_singlethread_workqueue("cfg80211"); |
1054 | if (!cfg80211_wq) | |
1055 | goto out_fail_wq; | |
1056 | ||
704232c2 JB |
1057 | return 0; |
1058 | ||
e60d7443 AB |
1059 | out_fail_wq: |
1060 | regulatory_exit(); | |
b2e1b302 LR |
1061 | out_fail_reg: |
1062 | debugfs_remove(ieee80211_debugfs_dir); | |
55682965 JB |
1063 | out_fail_nl80211: |
1064 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); | |
704232c2 JB |
1065 | out_fail_notifier: |
1066 | wiphy_sysfs_exit(); | |
1067 | out_fail_sysfs: | |
463d0183 JB |
1068 | unregister_pernet_device(&cfg80211_pernet_ops); |
1069 | out_fail_pernet: | |
704232c2 JB |
1070 | return err; |
1071 | } | |
3a462465 | 1072 | subsys_initcall(cfg80211_init); |
704232c2 | 1073 | |
f884e387 | 1074 | static void __exit cfg80211_exit(void) |
704232c2 JB |
1075 | { |
1076 | debugfs_remove(ieee80211_debugfs_dir); | |
55682965 | 1077 | nl80211_exit(); |
704232c2 JB |
1078 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); |
1079 | wiphy_sysfs_exit(); | |
b2e1b302 | 1080 | regulatory_exit(); |
463d0183 | 1081 | unregister_pernet_device(&cfg80211_pernet_ops); |
e60d7443 | 1082 | destroy_workqueue(cfg80211_wq); |
704232c2 JB |
1083 | } |
1084 | module_exit(cfg80211_exit); |