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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> |
2740f0cf | 5 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
53873f13 | 6 | * Copyright 2015 Intel Deutschland GmbH |
704232c2 JB |
7 | */ |
8 | ||
e9c0268f JP |
9 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
10 | ||
704232c2 JB |
11 | #include <linux/if.h> |
12 | #include <linux/module.h> | |
13 | #include <linux/err.h> | |
704232c2 | 14 | #include <linux/list.h> |
5a0e3ad6 | 15 | #include <linux/slab.h> |
704232c2 JB |
16 | #include <linux/nl80211.h> |
17 | #include <linux/debugfs.h> | |
18 | #include <linux/notifier.h> | |
19 | #include <linux/device.h> | |
16a832e7 | 20 | #include <linux/etherdevice.h> |
1f87f7d3 | 21 | #include <linux/rtnetlink.h> |
d43c36dc | 22 | #include <linux/sched.h> |
704232c2 JB |
23 | #include <net/genetlink.h> |
24 | #include <net/cfg80211.h> | |
55682965 | 25 | #include "nl80211.h" |
704232c2 JB |
26 | #include "core.h" |
27 | #include "sysfs.h" | |
1ac61302 | 28 | #include "debugfs.h" |
a9a11622 | 29 | #include "wext-compat.h" |
e35e4d28 | 30 | #include "rdev-ops.h" |
704232c2 JB |
31 | |
32 | /* name for sysfs, %d is appended */ | |
33 | #define PHY_NAME "phy" | |
34 | ||
35 | MODULE_AUTHOR("Johannes Berg"); | |
36 | MODULE_LICENSE("GPL"); | |
37 | MODULE_DESCRIPTION("wireless configuration support"); | |
fb4e1568 | 38 | MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME); |
704232c2 | 39 | |
5fe231e8 | 40 | /* RCU-protected (and RTNL for writers) */ |
79c97e97 | 41 | LIST_HEAD(cfg80211_rdev_list); |
f5ea9120 | 42 | int cfg80211_rdev_list_generation; |
a1794390 | 43 | |
704232c2 JB |
44 | /* for debugfs */ |
45 | static struct dentry *ieee80211_debugfs_dir; | |
46 | ||
e60d7443 AB |
47 | /* for the cleanup, scan and event works */ |
48 | struct workqueue_struct *cfg80211_wq; | |
49 | ||
40db6c77 AK |
50 | static bool cfg80211_disable_40mhz_24ghz; |
51 | module_param(cfg80211_disable_40mhz_24ghz, bool, 0644); | |
52 | MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz, | |
53 | "Disable 40MHz support in the 2.4GHz band"); | |
54 | ||
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 | |
5fe231e8 | 59 | ASSERT_RTNL(); |
761cf7ec | 60 | |
79c97e97 JB |
61 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
62 | if (rdev->wiphy_idx == wiphy_idx) { | |
63 | result = rdev; | |
55682965 JB |
64 | break; |
65 | } | |
66 | } | |
67 | ||
68 | return result; | |
69 | } | |
70 | ||
806a9e39 LR |
71 | int get_wiphy_idx(struct wiphy *wiphy) |
72 | { | |
f26cbf40 | 73 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
f4173766 | 74 | |
79c97e97 | 75 | return rdev->wiphy_idx; |
806a9e39 LR |
76 | } |
77 | ||
806a9e39 LR |
78 | struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx) |
79 | { | |
79c97e97 | 80 | struct cfg80211_registered_device *rdev; |
806a9e39 | 81 | |
5fe231e8 | 82 | ASSERT_RTNL(); |
806a9e39 | 83 | |
79c97e97 JB |
84 | rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx); |
85 | if (!rdev) | |
806a9e39 | 86 | return NULL; |
79c97e97 | 87 | return &rdev->wiphy; |
806a9e39 LR |
88 | } |
89 | ||
1998d90a BG |
90 | static int cfg80211_dev_check_name(struct cfg80211_registered_device *rdev, |
91 | const char *newname) | |
55682965 | 92 | { |
79c97e97 | 93 | struct cfg80211_registered_device *rdev2; |
1998d90a | 94 | int wiphy_idx, taken = -1, digits; |
55682965 | 95 | |
5fe231e8 | 96 | ASSERT_RTNL(); |
2940bb69 | 97 | |
7623225f JB |
98 | /* prohibit calling the thing phy%d when %d is not its number */ |
99 | sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken); | |
100 | if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) { | |
101 | /* count number of places needed to print wiphy_idx */ | |
102 | digits = 1; | |
103 | while (wiphy_idx /= 10) | |
104 | digits++; | |
105 | /* | |
106 | * deny the name if it is phy<idx> where <idx> is printed | |
107 | * without leading zeroes. taken == strlen(newname) here | |
108 | */ | |
109 | if (taken == strlen(PHY_NAME) + digits) | |
110 | return -EINVAL; | |
111 | } | |
112 | ||
1998d90a BG |
113 | /* Ensure another device does not already have this name. */ |
114 | list_for_each_entry(rdev2, &cfg80211_rdev_list, list) | |
115 | if (strcmp(newname, wiphy_name(&rdev2->wiphy)) == 0) | |
116 | return -EINVAL; | |
117 | ||
118 | return 0; | |
119 | } | |
120 | ||
121 | int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, | |
122 | char *newname) | |
123 | { | |
124 | int result; | |
125 | ||
126 | ASSERT_RTNL(); | |
7623225f | 127 | |
2940bb69 | 128 | /* Ignore nop renames */ |
1998d90a | 129 | if (strcmp(newname, wiphy_name(&rdev->wiphy)) == 0) |
4bbf4d56 | 130 | return 0; |
2940bb69 | 131 | |
1998d90a BG |
132 | result = cfg80211_dev_check_name(rdev, newname); |
133 | if (result < 0) | |
134 | return result; | |
55682965 | 135 | |
55682965 JB |
136 | result = device_rename(&rdev->wiphy.dev, newname); |
137 | if (result) | |
4bbf4d56 | 138 | return result; |
55682965 | 139 | |
33c0360b JB |
140 | if (rdev->wiphy.debugfsdir && |
141 | !debugfs_rename(rdev->wiphy.debugfsdir->d_parent, | |
55682965 JB |
142 | rdev->wiphy.debugfsdir, |
143 | rdev->wiphy.debugfsdir->d_parent, | |
144 | newname)) | |
e9c0268f | 145 | pr_err("failed to rename debugfs dir to %s!\n", newname); |
55682965 | 146 | |
3bb20556 | 147 | nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); |
55682965 | 148 | |
4bbf4d56 | 149 | return 0; |
55682965 JB |
150 | } |
151 | ||
463d0183 JB |
152 | int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, |
153 | struct net *net) | |
154 | { | |
155 | struct wireless_dev *wdev; | |
156 | int err = 0; | |
157 | ||
5be83de5 | 158 | if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK)) |
463d0183 JB |
159 | return -EOPNOTSUPP; |
160 | ||
53873f13 | 161 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { |
ba22fb5b JB |
162 | if (!wdev->netdev) |
163 | continue; | |
463d0183 JB |
164 | wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; |
165 | err = dev_change_net_namespace(wdev->netdev, net, "wlan%d"); | |
166 | if (err) | |
167 | break; | |
168 | wdev->netdev->features |= NETIF_F_NETNS_LOCAL; | |
169 | } | |
170 | ||
171 | if (err) { | |
172 | /* failed -- clean up to old netns */ | |
173 | net = wiphy_net(&rdev->wiphy); | |
174 | ||
53873f13 JB |
175 | list_for_each_entry_continue_reverse(wdev, |
176 | &rdev->wiphy.wdev_list, | |
463d0183 | 177 | list) { |
ba22fb5b JB |
178 | if (!wdev->netdev) |
179 | continue; | |
463d0183 JB |
180 | wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; |
181 | err = dev_change_net_namespace(wdev->netdev, net, | |
182 | "wlan%d"); | |
183 | WARN_ON(err); | |
184 | wdev->netdev->features |= NETIF_F_NETNS_LOCAL; | |
185 | } | |
04600794 JB |
186 | |
187 | return err; | |
463d0183 JB |
188 | } |
189 | ||
190 | wiphy_net_set(&rdev->wiphy, net); | |
191 | ||
04600794 JB |
192 | err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev)); |
193 | WARN_ON(err); | |
194 | ||
195 | return 0; | |
463d0183 JB |
196 | } |
197 | ||
1f87f7d3 JB |
198 | static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data) |
199 | { | |
79c97e97 | 200 | struct cfg80211_registered_device *rdev = data; |
1f87f7d3 | 201 | |
e35e4d28 | 202 | rdev_rfkill_poll(rdev); |
1f87f7d3 JB |
203 | } |
204 | ||
f9f47529 JB |
205 | void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, |
206 | struct wireless_dev *wdev) | |
207 | { | |
5fe231e8 | 208 | ASSERT_RTNL(); |
f9f47529 JB |
209 | |
210 | if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)) | |
211 | return; | |
212 | ||
73c7da3d | 213 | if (!wdev_running(wdev)) |
f9f47529 JB |
214 | return; |
215 | ||
216 | rdev_stop_p2p_device(rdev, wdev); | |
73c7da3d | 217 | wdev->is_running = false; |
f9f47529 JB |
218 | |
219 | rdev->opencount--; | |
220 | ||
a617302c JB |
221 | if (rdev->scan_req && rdev->scan_req->wdev == wdev) { |
222 | if (WARN_ON(!rdev->scan_req->notified)) | |
1d76250b | 223 | rdev->scan_req->info.aborted = true; |
f9d15d16 | 224 | ___cfg80211_scan_done(rdev, false); |
a617302c | 225 | } |
f9f47529 JB |
226 | } |
227 | ||
cb3b7d87 AB |
228 | void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, |
229 | struct wireless_dev *wdev) | |
230 | { | |
231 | ASSERT_RTNL(); | |
232 | ||
233 | if (WARN_ON(wdev->iftype != NL80211_IFTYPE_NAN)) | |
234 | return; | |
235 | ||
73c7da3d | 236 | if (!wdev_running(wdev)) |
cb3b7d87 AB |
237 | return; |
238 | ||
239 | rdev_stop_nan(rdev, wdev); | |
73c7da3d | 240 | wdev->is_running = false; |
cb3b7d87 AB |
241 | |
242 | rdev->opencount--; | |
243 | } | |
244 | ||
f6837ba8 | 245 | void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy) |
1f87f7d3 | 246 | { |
f6837ba8 | 247 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
1f87f7d3 JB |
248 | struct wireless_dev *wdev; |
249 | ||
f6837ba8 | 250 | ASSERT_RTNL(); |
f9f47529 | 251 | |
53873f13 | 252 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { |
98104fde | 253 | if (wdev->netdev) { |
ba22fb5b | 254 | dev_close(wdev->netdev); |
98104fde JB |
255 | continue; |
256 | } | |
257 | /* otherwise, check iftype */ | |
258 | switch (wdev->iftype) { | |
259 | case NL80211_IFTYPE_P2P_DEVICE: | |
f9f47529 | 260 | cfg80211_stop_p2p_device(rdev, wdev); |
98104fde | 261 | break; |
cb3b7d87 AB |
262 | case NL80211_IFTYPE_NAN: |
263 | cfg80211_stop_nan(rdev, wdev); | |
264 | break; | |
98104fde JB |
265 | default: |
266 | break; | |
267 | } | |
268 | } | |
f6837ba8 JB |
269 | } |
270 | EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces); | |
1f87f7d3 | 271 | |
f6837ba8 JB |
272 | static int cfg80211_rfkill_set_block(void *data, bool blocked) |
273 | { | |
274 | struct cfg80211_registered_device *rdev = data; | |
275 | ||
276 | if (!blocked) | |
277 | return 0; | |
278 | ||
279 | rtnl_lock(); | |
280 | cfg80211_shutdown_all_interfaces(&rdev->wiphy); | |
1f87f7d3 JB |
281 | rtnl_unlock(); |
282 | ||
283 | return 0; | |
284 | } | |
285 | ||
286 | static void cfg80211_rfkill_sync_work(struct work_struct *work) | |
287 | { | |
79c97e97 | 288 | struct cfg80211_registered_device *rdev; |
1f87f7d3 | 289 | |
79c97e97 JB |
290 | rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync); |
291 | cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill)); | |
1f87f7d3 JB |
292 | } |
293 | ||
667503dd JB |
294 | static void cfg80211_event_work(struct work_struct *work) |
295 | { | |
296 | struct cfg80211_registered_device *rdev; | |
667503dd JB |
297 | |
298 | rdev = container_of(work, struct cfg80211_registered_device, | |
299 | event_work); | |
300 | ||
301 | rtnl_lock(); | |
3d54d255 | 302 | cfg80211_process_rdev_events(rdev); |
667503dd JB |
303 | rtnl_unlock(); |
304 | } | |
305 | ||
78f22b6a JB |
306 | void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev) |
307 | { | |
308 | struct cfg80211_iface_destroy *item; | |
309 | ||
310 | ASSERT_RTNL(); | |
311 | ||
312 | spin_lock_irq(&rdev->destroy_list_lock); | |
313 | while ((item = list_first_entry_or_null(&rdev->destroy_list, | |
314 | struct cfg80211_iface_destroy, | |
315 | list))) { | |
316 | struct wireless_dev *wdev, *tmp; | |
317 | u32 nlportid = item->nlportid; | |
318 | ||
319 | list_del(&item->list); | |
320 | kfree(item); | |
321 | spin_unlock_irq(&rdev->destroy_list_lock); | |
322 | ||
53873f13 JB |
323 | list_for_each_entry_safe(wdev, tmp, |
324 | &rdev->wiphy.wdev_list, list) { | |
78f22b6a JB |
325 | if (nlportid == wdev->owner_nlportid) |
326 | rdev_del_virtual_intf(rdev, wdev); | |
327 | } | |
328 | ||
329 | spin_lock_irq(&rdev->destroy_list_lock); | |
330 | } | |
331 | spin_unlock_irq(&rdev->destroy_list_lock); | |
332 | } | |
333 | ||
334 | static void cfg80211_destroy_iface_wk(struct work_struct *work) | |
335 | { | |
336 | struct cfg80211_registered_device *rdev; | |
337 | ||
338 | rdev = container_of(work, struct cfg80211_registered_device, | |
339 | destroy_work); | |
340 | ||
341 | rtnl_lock(); | |
342 | cfg80211_destroy_ifaces(rdev); | |
343 | rtnl_unlock(); | |
344 | } | |
345 | ||
93a1e86c JR |
346 | static void cfg80211_sched_scan_stop_wk(struct work_struct *work) |
347 | { | |
348 | struct cfg80211_registered_device *rdev; | |
349 | ||
350 | rdev = container_of(work, struct cfg80211_registered_device, | |
351 | sched_scan_stop_wk); | |
352 | ||
353 | rtnl_lock(); | |
354 | ||
355 | __cfg80211_stop_sched_scan(rdev, false); | |
356 | ||
357 | rtnl_unlock(); | |
358 | } | |
359 | ||
704232c2 JB |
360 | /* exported functions */ |
361 | ||
1998d90a BG |
362 | struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv, |
363 | const char *requested_name) | |
704232c2 | 364 | { |
73810b77 | 365 | static atomic_t wiphy_counter = ATOMIC_INIT(0); |
7623225f JB |
366 | |
367 | struct cfg80211_registered_device *rdev; | |
704232c2 JB |
368 | int alloc_size; |
369 | ||
0b20633d JB |
370 | WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key)); |
371 | WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc)); | |
372 | WARN_ON(ops->connect && !ops->disconnect); | |
373 | WARN_ON(ops->join_ibss && !ops->leave_ibss); | |
374 | WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf); | |
375 | WARN_ON(ops->add_station && !ops->del_station); | |
376 | WARN_ON(ops->add_mpath && !ops->del_mpath); | |
29cbe68c | 377 | WARN_ON(ops->join_mesh && !ops->leave_mesh); |
de3bb771 OO |
378 | WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device); |
379 | WARN_ON(ops->start_ap && !ops->stop_ap); | |
380 | WARN_ON(ops->join_ocb && !ops->leave_ocb); | |
381 | WARN_ON(ops->suspend && !ops->resume); | |
382 | WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop); | |
383 | WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel); | |
384 | WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch); | |
385 | WARN_ON(ops->add_tx_ts && !ops->del_tx_ts); | |
41ade00f | 386 | |
79c97e97 | 387 | alloc_size = sizeof(*rdev) + sizeof_priv; |
704232c2 | 388 | |
79c97e97 JB |
389 | rdev = kzalloc(alloc_size, GFP_KERNEL); |
390 | if (!rdev) | |
704232c2 JB |
391 | return NULL; |
392 | ||
79c97e97 | 393 | rdev->ops = ops; |
704232c2 | 394 | |
73810b77 | 395 | rdev->wiphy_idx = atomic_inc_return(&wiphy_counter); |
a4d73ee1 | 396 | |
f4173766 | 397 | if (unlikely(rdev->wiphy_idx < 0)) { |
7623225f | 398 | /* ugh, wrapped! */ |
73810b77 | 399 | atomic_dec(&wiphy_counter); |
79c97e97 | 400 | kfree(rdev); |
704232c2 JB |
401 | return NULL; |
402 | } | |
704232c2 | 403 | |
9b881963 JB |
404 | /* atomic_inc_return makes it start at 1, make it start at 0 */ |
405 | rdev->wiphy_idx--; | |
406 | ||
7623225f | 407 | /* give it a proper name */ |
1998d90a BG |
408 | if (requested_name && requested_name[0]) { |
409 | int rv; | |
410 | ||
411 | rtnl_lock(); | |
412 | rv = cfg80211_dev_check_name(rdev, requested_name); | |
413 | ||
414 | if (rv < 0) { | |
415 | rtnl_unlock(); | |
416 | goto use_default_name; | |
417 | } | |
418 | ||
419 | rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name); | |
420 | rtnl_unlock(); | |
421 | if (rv) | |
422 | goto use_default_name; | |
423 | } else { | |
424 | use_default_name: | |
425 | /* NOTE: This is *probably* safe w/out holding rtnl because of | |
426 | * the restrictions on phy names. Probably this call could | |
427 | * fail if some other part of the kernel (re)named a device | |
428 | * phyX. But, might should add some locking and check return | |
429 | * value, and use a different name if this one exists? | |
430 | */ | |
431 | dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx); | |
432 | } | |
7623225f | 433 | |
53873f13 | 434 | INIT_LIST_HEAD(&rdev->wiphy.wdev_list); |
37c73b5f BG |
435 | INIT_LIST_HEAD(&rdev->beacon_registrations); |
436 | spin_lock_init(&rdev->beacon_registrations_lock); | |
79c97e97 JB |
437 | spin_lock_init(&rdev->bss_lock); |
438 | INIT_LIST_HEAD(&rdev->bss_list); | |
439 | INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done); | |
807f8a8c | 440 | INIT_WORK(&rdev->sched_scan_results_wk, __cfg80211_sched_scan_results); |
33d8783c JB |
441 | INIT_LIST_HEAD(&rdev->mlme_unreg); |
442 | spin_lock_init(&rdev->mlme_unreg_lock); | |
443 | INIT_WORK(&rdev->mlme_unreg_wk, cfg80211_mlme_unreg_wk); | |
04f39047 SW |
444 | INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk, |
445 | cfg80211_dfs_channels_update_work); | |
3d23e349 JB |
446 | #ifdef CONFIG_CFG80211_WEXT |
447 | rdev->wiphy.wext = &cfg80211_wext_handler; | |
448 | #endif | |
449 | ||
79c97e97 JB |
450 | device_initialize(&rdev->wiphy.dev); |
451 | rdev->wiphy.dev.class = &ieee80211_class; | |
452 | rdev->wiphy.dev.platform_data = rdev; | |
9f0e1354 | 453 | device_enable_async_suspend(&rdev->wiphy.dev); |
79c97e97 | 454 | |
78f22b6a JB |
455 | INIT_LIST_HEAD(&rdev->destroy_list); |
456 | spin_lock_init(&rdev->destroy_list_lock); | |
457 | INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk); | |
93a1e86c | 458 | INIT_WORK(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk); |
78f22b6a | 459 | |
5be83de5 JB |
460 | #ifdef CONFIG_CFG80211_DEFAULT_PS |
461 | rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; | |
462 | #endif | |
16cb9d42 | 463 | |
463d0183 JB |
464 | wiphy_net_set(&rdev->wiphy, &init_net); |
465 | ||
79c97e97 JB |
466 | rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block; |
467 | rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev), | |
468 | &rdev->wiphy.dev, RFKILL_TYPE_WLAN, | |
469 | &rdev->rfkill_ops, rdev); | |
470 | ||
471 | if (!rdev->rfkill) { | |
472 | kfree(rdev); | |
1f87f7d3 JB |
473 | return NULL; |
474 | } | |
475 | ||
79c97e97 JB |
476 | INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work); |
477 | INIT_WORK(&rdev->conn_work, cfg80211_conn_work); | |
478 | INIT_WORK(&rdev->event_work, cfg80211_event_work); | |
1f87f7d3 | 479 | |
ad002395 JB |
480 | init_waitqueue_head(&rdev->dev_wait); |
481 | ||
b9a5f8ca JM |
482 | /* |
483 | * Initialize wiphy parameters to IEEE 802.11 MIB default values. | |
484 | * Fragmentation and RTS threshold are disabled by default with the | |
485 | * special -1 value. | |
486 | */ | |
79c97e97 JB |
487 | rdev->wiphy.retry_short = 7; |
488 | rdev->wiphy.retry_long = 4; | |
489 | rdev->wiphy.frag_threshold = (u32) -1; | |
490 | rdev->wiphy.rts_threshold = (u32) -1; | |
81077e82 | 491 | rdev->wiphy.coverage_class = 0; |
b9a5f8ca | 492 | |
9a774c78 AO |
493 | rdev->wiphy.max_num_csa_counters = 1; |
494 | ||
3b06d277 AS |
495 | rdev->wiphy.max_sched_scan_plans = 1; |
496 | rdev->wiphy.max_sched_scan_plan_interval = U32_MAX; | |
497 | ||
79c97e97 | 498 | return &rdev->wiphy; |
704232c2 | 499 | } |
1998d90a | 500 | EXPORT_SYMBOL(wiphy_new_nm); |
704232c2 | 501 | |
7527a782 JB |
502 | static int wiphy_verify_combinations(struct wiphy *wiphy) |
503 | { | |
504 | const struct ieee80211_iface_combination *c; | |
505 | int i, j; | |
506 | ||
7527a782 JB |
507 | for (i = 0; i < wiphy->n_iface_combinations; i++) { |
508 | u32 cnt = 0; | |
509 | u16 all_iftypes = 0; | |
510 | ||
511 | c = &wiphy->iface_combinations[i]; | |
512 | ||
11c4a075 SW |
513 | /* |
514 | * Combinations with just one interface aren't real, | |
515 | * however we make an exception for DFS. | |
516 | */ | |
517 | if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths)) | |
7527a782 JB |
518 | return -EINVAL; |
519 | ||
520 | /* Need at least one channel */ | |
521 | if (WARN_ON(!c->num_different_channels)) | |
522 | return -EINVAL; | |
523 | ||
d4e50c59 MK |
524 | /* |
525 | * Put a sane limit on maximum number of different | |
526 | * channels to simplify channel accounting code. | |
527 | */ | |
528 | if (WARN_ON(c->num_different_channels > | |
529 | CFG80211_MAX_NUM_DIFFERENT_CHANNELS)) | |
530 | return -EINVAL; | |
531 | ||
11c4a075 SW |
532 | /* DFS only works on one channel. */ |
533 | if (WARN_ON(c->radar_detect_widths && | |
534 | (c->num_different_channels > 1))) | |
535 | return -EINVAL; | |
536 | ||
7527a782 JB |
537 | if (WARN_ON(!c->n_limits)) |
538 | return -EINVAL; | |
539 | ||
540 | for (j = 0; j < c->n_limits; j++) { | |
541 | u16 types = c->limits[j].types; | |
542 | ||
b6a55015 | 543 | /* interface types shouldn't overlap */ |
7527a782 JB |
544 | if (WARN_ON(types & all_iftypes)) |
545 | return -EINVAL; | |
546 | all_iftypes |= types; | |
547 | ||
548 | if (WARN_ON(!c->limits[j].max)) | |
549 | return -EINVAL; | |
550 | ||
551 | /* Shouldn't list software iftypes in combinations! */ | |
552 | if (WARN_ON(wiphy->software_iftypes & types)) | |
553 | return -EINVAL; | |
554 | ||
98104fde JB |
555 | /* Only a single P2P_DEVICE can be allowed */ |
556 | if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) && | |
557 | c->limits[j].max > 1)) | |
558 | return -EINVAL; | |
559 | ||
cb3b7d87 AB |
560 | /* Only a single NAN can be allowed */ |
561 | if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) && | |
562 | c->limits[j].max > 1)) | |
563 | return -EINVAL; | |
564 | ||
56271da2 JB |
565 | /* |
566 | * This isn't well-defined right now. If you have an | |
567 | * IBSS interface, then its beacon interval may change | |
568 | * by joining other networks, and nothing prevents it | |
569 | * from doing that. | |
570 | * So technically we probably shouldn't even allow AP | |
571 | * and IBSS in the same interface, but it seems that | |
572 | * some drivers support that, possibly only with fixed | |
573 | * beacon intervals for IBSS. | |
574 | */ | |
575 | if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) && | |
576 | c->beacon_int_min_gcd)) { | |
577 | return -EINVAL; | |
578 | } | |
579 | ||
7527a782 JB |
580 | cnt += c->limits[j].max; |
581 | /* | |
582 | * Don't advertise an unsupported type | |
583 | * in a combination. | |
584 | */ | |
585 | if (WARN_ON((wiphy->interface_modes & types) != types)) | |
586 | return -EINVAL; | |
587 | } | |
588 | ||
8f205423 JB |
589 | #ifndef CONFIG_WIRELESS_WDS |
590 | if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS))) | |
591 | return -EINVAL; | |
592 | #endif | |
593 | ||
7527a782 JB |
594 | /* You can't even choose that many! */ |
595 | if (WARN_ON(cnt < c->max_interfaces)) | |
596 | return -EINVAL; | |
597 | } | |
598 | ||
599 | return 0; | |
600 | } | |
601 | ||
704232c2 JB |
602 | int wiphy_register(struct wiphy *wiphy) |
603 | { | |
f26cbf40 | 604 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
704232c2 | 605 | int res; |
57fbcce3 | 606 | enum nl80211_band band; |
8318d78a JB |
607 | struct ieee80211_supported_band *sband; |
608 | bool have_band = false; | |
609 | int i; | |
f59ac048 LR |
610 | u16 ifmodes = wiphy->interface_modes; |
611 | ||
dfb89c56 | 612 | #ifdef CONFIG_PM |
964dc9e2 JB |
613 | if (WARN_ON(wiphy->wowlan && |
614 | (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) && | |
615 | !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY))) | |
616 | return -EINVAL; | |
617 | if (WARN_ON(wiphy->wowlan && | |
618 | !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns && | |
619 | !wiphy->wowlan->tcp)) | |
77dbbb13 | 620 | return -EINVAL; |
dfb89c56 | 621 | #endif |
1057d35e AN |
622 | if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && |
623 | (!rdev->ops->tdls_channel_switch || | |
624 | !rdev->ops->tdls_cancel_channel_switch))) | |
625 | return -EINVAL; | |
77dbbb13 | 626 | |
cb3b7d87 | 627 | if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) && |
a442b761 AB |
628 | (!rdev->ops->start_nan || !rdev->ops->stop_nan || |
629 | !rdev->ops->add_nan_func || !rdev->ops->del_nan_func))) | |
cb3b7d87 AB |
630 | return -EINVAL; |
631 | ||
8f205423 JB |
632 | #ifndef CONFIG_WIRELESS_WDS |
633 | if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))) | |
634 | return -EINVAL; | |
635 | #endif | |
636 | ||
ad932f04 AN |
637 | /* |
638 | * if a wiphy has unsupported modes for regulatory channel enforcement, | |
639 | * opt-out of enforcement checking | |
640 | */ | |
641 | if (wiphy->interface_modes & ~(BIT(NL80211_IFTYPE_STATION) | | |
642 | BIT(NL80211_IFTYPE_P2P_CLIENT) | | |
643 | BIT(NL80211_IFTYPE_AP) | | |
644 | BIT(NL80211_IFTYPE_P2P_GO) | | |
645 | BIT(NL80211_IFTYPE_ADHOC) | | |
646 | BIT(NL80211_IFTYPE_P2P_DEVICE) | | |
cb3b7d87 | 647 | BIT(NL80211_IFTYPE_NAN) | |
ad932f04 AN |
648 | BIT(NL80211_IFTYPE_AP_VLAN) | |
649 | BIT(NL80211_IFTYPE_MONITOR))) | |
650 | wiphy->regulatory_flags |= REGULATORY_IGNORE_STALE_KICKOFF; | |
651 | ||
b0d7aa59 JD |
652 | if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) && |
653 | (wiphy->regulatory_flags & | |
654 | (REGULATORY_CUSTOM_REG | | |
655 | REGULATORY_STRICT_REG | | |
656 | REGULATORY_COUNTRY_IE_FOLLOW_POWER | | |
657 | REGULATORY_COUNTRY_IE_IGNORE)))) | |
658 | return -EINVAL; | |
659 | ||
be29b99a AK |
660 | if (WARN_ON(wiphy->coalesce && |
661 | (!wiphy->coalesce->n_rules || | |
662 | !wiphy->coalesce->n_patterns) && | |
663 | (!wiphy->coalesce->pattern_min_len || | |
664 | wiphy->coalesce->pattern_min_len > | |
665 | wiphy->coalesce->pattern_max_len))) | |
666 | return -EINVAL; | |
667 | ||
562a7480 JB |
668 | if (WARN_ON(wiphy->ap_sme_capa && |
669 | !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME))) | |
670 | return -EINVAL; | |
671 | ||
ef15aac6 JB |
672 | if (WARN_ON(wiphy->addresses && !wiphy->n_addresses)) |
673 | return -EINVAL; | |
674 | ||
675 | if (WARN_ON(wiphy->addresses && | |
676 | !is_zero_ether_addr(wiphy->perm_addr) && | |
677 | memcmp(wiphy->perm_addr, wiphy->addresses[0].addr, | |
678 | ETH_ALEN))) | |
679 | return -EINVAL; | |
680 | ||
77765eaf VT |
681 | if (WARN_ON(wiphy->max_acl_mac_addrs && |
682 | (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) || | |
683 | !rdev->ops->set_mac_acl))) | |
684 | return -EINVAL; | |
685 | ||
38de03d2 AS |
686 | /* assure only valid behaviours are flagged by driver |
687 | * hence subtract 2 as bit 0 is invalid. | |
688 | */ | |
689 | if (WARN_ON(wiphy->bss_select_support && | |
690 | (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2)))) | |
691 | return -EINVAL; | |
692 | ||
ef15aac6 JB |
693 | if (wiphy->addresses) |
694 | memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN); | |
695 | ||
f59ac048 LR |
696 | /* sanity check ifmodes */ |
697 | WARN_ON(!ifmodes); | |
2e161f78 | 698 | ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1; |
f59ac048 LR |
699 | if (WARN_ON(ifmodes != wiphy->interface_modes)) |
700 | wiphy->interface_modes = ifmodes; | |
8318d78a | 701 | |
7527a782 JB |
702 | res = wiphy_verify_combinations(wiphy); |
703 | if (res) | |
704 | return res; | |
705 | ||
8318d78a | 706 | /* sanity check supported bands/channels */ |
57fbcce3 | 707 | for (band = 0; band < NUM_NL80211_BANDS; band++) { |
8318d78a JB |
708 | sband = wiphy->bands[band]; |
709 | if (!sband) | |
710 | continue; | |
711 | ||
712 | sband->band = band; | |
3a0c52a6 VK |
713 | if (WARN_ON(!sband->n_channels)) |
714 | return -EINVAL; | |
715 | /* | |
8047d261 | 716 | * on 60GHz band, there are no legacy rates, so |
3a0c52a6 VK |
717 | * n_bitrates is 0 |
718 | */ | |
57fbcce3 | 719 | if (WARN_ON(band != NL80211_BAND_60GHZ && |
3a0c52a6 | 720 | !sband->n_bitrates)) |
881d948c JB |
721 | return -EINVAL; |
722 | ||
40db6c77 AK |
723 | /* |
724 | * Since cfg80211_disable_40mhz_24ghz is global, we can | |
725 | * modify the sband's ht data even if the driver uses a | |
726 | * global structure for that. | |
727 | */ | |
728 | if (cfg80211_disable_40mhz_24ghz && | |
57fbcce3 | 729 | band == NL80211_BAND_2GHZ && |
40db6c77 AK |
730 | sband->ht_cap.ht_supported) { |
731 | sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
732 | sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40; | |
733 | } | |
734 | ||
881d948c JB |
735 | /* |
736 | * Since we use a u32 for rate bitmaps in | |
737 | * ieee80211_get_response_rate, we cannot | |
738 | * have more than 32 legacy rates. | |
739 | */ | |
740 | if (WARN_ON(sband->n_bitrates > 32)) | |
8318d78a | 741 | return -EINVAL; |
8318d78a JB |
742 | |
743 | for (i = 0; i < sband->n_channels; i++) { | |
744 | sband->channels[i].orig_flags = | |
745 | sband->channels[i].flags; | |
c4a9fafc | 746 | sband->channels[i].orig_mag = INT_MAX; |
8318d78a JB |
747 | sband->channels[i].orig_mpwr = |
748 | sband->channels[i].max_power; | |
749 | sband->channels[i].band = band; | |
750 | } | |
751 | ||
752 | have_band = true; | |
753 | } | |
754 | ||
755 | if (!have_band) { | |
756 | WARN_ON(1); | |
757 | return -EINVAL; | |
758 | } | |
759 | ||
dfb89c56 | 760 | #ifdef CONFIG_PM |
964dc9e2 JB |
761 | if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns && |
762 | (!rdev->wiphy.wowlan->pattern_min_len || | |
763 | rdev->wiphy.wowlan->pattern_min_len > | |
764 | rdev->wiphy.wowlan->pattern_max_len))) | |
765 | return -EINVAL; | |
dfb89c56 | 766 | #endif |
ff1b6e69 | 767 | |
8318d78a JB |
768 | /* check and set up bitrates */ |
769 | ieee80211_set_bitrate_flags(wiphy); | |
770 | ||
00c3a6ed JB |
771 | rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH; |
772 | ||
aa5f66d5 | 773 | rtnl_lock(); |
79c97e97 | 774 | res = device_add(&rdev->wiphy.dev); |
c3d34d5d | 775 | if (res) { |
aa5f66d5 | 776 | rtnl_unlock(); |
c3d34d5d JL |
777 | return res; |
778 | } | |
1f87f7d3 | 779 | |
2f0accc1 | 780 | /* set up regulatory info */ |
57b5ce07 | 781 | wiphy_regulatory_register(wiphy); |
2f0accc1 | 782 | |
5f2aa25e | 783 | list_add_rcu(&rdev->list, &cfg80211_rdev_list); |
f5ea9120 | 784 | cfg80211_rdev_list_generation++; |
704232c2 JB |
785 | |
786 | /* add to debugfs */ | |
79c97e97 JB |
787 | rdev->wiphy.debugfsdir = |
788 | debugfs_create_dir(wiphy_name(&rdev->wiphy), | |
704232c2 | 789 | ieee80211_debugfs_dir); |
79c97e97 JB |
790 | if (IS_ERR(rdev->wiphy.debugfsdir)) |
791 | rdev->wiphy.debugfsdir = NULL; | |
704232c2 | 792 | |
a796dac9 TB |
793 | cfg80211_debugfs_rdev_add(rdev); |
794 | nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); | |
795 | ||
a2f73b6c | 796 | if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { |
73d54c9e LR |
797 | struct regulatory_request request; |
798 | ||
799 | request.wiphy_idx = get_wiphy_idx(wiphy); | |
800 | request.initiator = NL80211_REGDOM_SET_BY_DRIVER; | |
801 | request.alpha2[0] = '9'; | |
802 | request.alpha2[1] = '9'; | |
803 | ||
804 | nl80211_send_reg_change_event(&request); | |
805 | } | |
806 | ||
019ae3a9 KV |
807 | /* Check that nobody globally advertises any capabilities they do not |
808 | * advertise on all possible interface types. | |
809 | */ | |
810 | if (wiphy->extended_capabilities_len && | |
811 | wiphy->num_iftype_ext_capab && | |
812 | wiphy->iftype_ext_capab) { | |
813 | u8 supported_on_all, j; | |
814 | const struct wiphy_iftype_ext_capab *capab; | |
815 | ||
816 | capab = wiphy->iftype_ext_capab; | |
817 | for (j = 0; j < wiphy->extended_capabilities_len; j++) { | |
818 | if (capab[0].extended_capabilities_len > j) | |
819 | supported_on_all = | |
820 | capab[0].extended_capabilities[j]; | |
821 | else | |
822 | supported_on_all = 0x00; | |
823 | for (i = 1; i < wiphy->num_iftype_ext_capab; i++) { | |
824 | if (j >= capab[i].extended_capabilities_len) { | |
825 | supported_on_all = 0x00; | |
826 | break; | |
827 | } | |
828 | supported_on_all &= | |
829 | capab[i].extended_capabilities[j]; | |
830 | } | |
831 | if (WARN_ON(wiphy->extended_capabilities[j] & | |
832 | ~supported_on_all)) | |
833 | break; | |
834 | } | |
835 | } | |
836 | ||
ecb44335 SG |
837 | rdev->wiphy.registered = true; |
838 | rtnl_unlock(); | |
aa5f66d5 JB |
839 | |
840 | res = rfkill_register(rdev->rfkill); | |
841 | if (res) { | |
842 | rfkill_destroy(rdev->rfkill); | |
843 | rdev->rfkill = NULL; | |
844 | wiphy_unregister(&rdev->wiphy); | |
845 | return res; | |
846 | } | |
847 | ||
2f0accc1 | 848 | return 0; |
704232c2 JB |
849 | } |
850 | EXPORT_SYMBOL(wiphy_register); | |
851 | ||
1f87f7d3 JB |
852 | void wiphy_rfkill_start_polling(struct wiphy *wiphy) |
853 | { | |
f26cbf40 | 854 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
1f87f7d3 | 855 | |
79c97e97 | 856 | if (!rdev->ops->rfkill_poll) |
1f87f7d3 | 857 | return; |
79c97e97 JB |
858 | rdev->rfkill_ops.poll = cfg80211_rfkill_poll; |
859 | rfkill_resume_polling(rdev->rfkill); | |
1f87f7d3 JB |
860 | } |
861 | EXPORT_SYMBOL(wiphy_rfkill_start_polling); | |
862 | ||
863 | void wiphy_rfkill_stop_polling(struct wiphy *wiphy) | |
864 | { | |
f26cbf40 | 865 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
1f87f7d3 | 866 | |
79c97e97 | 867 | rfkill_pause_polling(rdev->rfkill); |
1f87f7d3 JB |
868 | } |
869 | EXPORT_SYMBOL(wiphy_rfkill_stop_polling); | |
870 | ||
704232c2 JB |
871 | void wiphy_unregister(struct wiphy *wiphy) |
872 | { | |
f26cbf40 | 873 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
704232c2 | 874 | |
ad002395 JB |
875 | wait_event(rdev->dev_wait, ({ |
876 | int __count; | |
5fe231e8 | 877 | rtnl_lock(); |
ad002395 | 878 | __count = rdev->opencount; |
5fe231e8 | 879 | rtnl_unlock(); |
c4f60846 | 880 | __count == 0; })); |
ad002395 | 881 | |
aa5f66d5 JB |
882 | if (rdev->rfkill) |
883 | rfkill_unregister(rdev->rfkill); | |
256c90de | 884 | |
5fe231e8 | 885 | rtnl_lock(); |
3bb20556 | 886 | nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY); |
5fe231e8 JB |
887 | rdev->wiphy.registered = false; |
888 | ||
53873f13 | 889 | WARN_ON(!list_empty(&rdev->wiphy.wdev_list)); |
ad002395 JB |
890 | |
891 | /* | |
892 | * First remove the hardware from everywhere, this makes | |
893 | * it impossible to find from userspace. | |
894 | */ | |
7bcfaf2f | 895 | debugfs_remove_recursive(rdev->wiphy.debugfsdir); |
5f2aa25e JB |
896 | list_del_rcu(&rdev->list); |
897 | synchronize_rcu(); | |
f16bfc1c | 898 | |
bfead080 LR |
899 | /* |
900 | * If this device got a regulatory hint tell core its | |
901 | * free to listen now to a new shiny device regulatory hint | |
902 | */ | |
903 | wiphy_regulatory_deregister(wiphy); | |
3f2355cb | 904 | |
f5ea9120 | 905 | cfg80211_rdev_list_generation++; |
79c97e97 | 906 | device_del(&rdev->wiphy.dev); |
704232c2 | 907 | |
5fe231e8 | 908 | rtnl_unlock(); |
6682588a | 909 | |
36e6fea8 | 910 | flush_work(&rdev->scan_done_wk); |
6682588a | 911 | cancel_work_sync(&rdev->conn_work); |
6682588a | 912 | flush_work(&rdev->event_work); |
04f39047 | 913 | cancel_delayed_work_sync(&rdev->dfs_update_channels_wk); |
78f22b6a | 914 | flush_work(&rdev->destroy_work); |
93a1e86c | 915 | flush_work(&rdev->sched_scan_stop_wk); |
33d8783c | 916 | flush_work(&rdev->mlme_unreg_wk); |
6d52563f | 917 | |
6abb9cb9 JB |
918 | #ifdef CONFIG_PM |
919 | if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup) | |
e35e4d28 | 920 | rdev_set_wakeup(rdev, false); |
6abb9cb9 | 921 | #endif |
6d52563f | 922 | cfg80211_rdev_free_wowlan(rdev); |
be29b99a | 923 | cfg80211_rdev_free_coalesce(rdev); |
704232c2 JB |
924 | } |
925 | EXPORT_SYMBOL(wiphy_unregister); | |
926 | ||
79c97e97 | 927 | void cfg80211_dev_free(struct cfg80211_registered_device *rdev) |
704232c2 | 928 | { |
2a519311 | 929 | struct cfg80211_internal_bss *scan, *tmp; |
37c73b5f | 930 | struct cfg80211_beacon_registration *reg, *treg; |
79c97e97 | 931 | rfkill_destroy(rdev->rfkill); |
37c73b5f BG |
932 | list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) { |
933 | list_del(®->list); | |
934 | kfree(reg); | |
935 | } | |
79c97e97 | 936 | list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list) |
5b112d3d | 937 | cfg80211_put_bss(&rdev->wiphy, &scan->pub); |
79c97e97 | 938 | kfree(rdev); |
704232c2 JB |
939 | } |
940 | ||
941 | void wiphy_free(struct wiphy *wiphy) | |
942 | { | |
943 | put_device(&wiphy->dev); | |
944 | } | |
945 | EXPORT_SYMBOL(wiphy_free); | |
946 | ||
1f87f7d3 JB |
947 | void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked) |
948 | { | |
f26cbf40 | 949 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
1f87f7d3 | 950 | |
79c97e97 JB |
951 | if (rfkill_set_hw_state(rdev->rfkill, blocked)) |
952 | schedule_work(&rdev->rfkill_sync); | |
1f87f7d3 JB |
953 | } |
954 | EXPORT_SYMBOL(wiphy_rfkill_set_hw_state); | |
955 | ||
98104fde JB |
956 | void cfg80211_unregister_wdev(struct wireless_dev *wdev) |
957 | { | |
f26cbf40 | 958 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); |
98104fde JB |
959 | |
960 | ASSERT_RTNL(); | |
961 | ||
962 | if (WARN_ON(wdev->netdev)) | |
963 | return; | |
964 | ||
7f8ed01e DK |
965 | nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE); |
966 | ||
98104fde JB |
967 | list_del_rcu(&wdev->list); |
968 | rdev->devlist_generation++; | |
969 | ||
970 | switch (wdev->iftype) { | |
971 | case NL80211_IFTYPE_P2P_DEVICE: | |
33d8783c | 972 | cfg80211_mlme_purge_registrations(wdev); |
f9f47529 | 973 | cfg80211_stop_p2p_device(rdev, wdev); |
98104fde | 974 | break; |
cb3b7d87 AB |
975 | case NL80211_IFTYPE_NAN: |
976 | cfg80211_stop_nan(rdev, wdev); | |
977 | break; | |
98104fde JB |
978 | default: |
979 | WARN_ON_ONCE(1); | |
980 | break; | |
981 | } | |
98104fde JB |
982 | } |
983 | EXPORT_SYMBOL(cfg80211_unregister_wdev); | |
984 | ||
f1e3d556 | 985 | static const struct device_type wiphy_type = { |
053a93dd MH |
986 | .name = "wlan", |
987 | }; | |
988 | ||
dbbae26a MK |
989 | void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, |
990 | enum nl80211_iftype iftype, int num) | |
991 | { | |
c5a7e582 | 992 | ASSERT_RTNL(); |
dbbae26a MK |
993 | |
994 | rdev->num_running_ifaces += num; | |
995 | if (iftype == NL80211_IFTYPE_MONITOR) | |
996 | rdev->num_running_monitor_ifaces += num; | |
dbbae26a MK |
997 | } |
998 | ||
f04c2203 MK |
999 | void __cfg80211_leave(struct cfg80211_registered_device *rdev, |
1000 | struct wireless_dev *wdev) | |
81256969 SG |
1001 | { |
1002 | struct net_device *dev = wdev->netdev; | |
31a60ed1 | 1003 | struct cfg80211_sched_scan_request *sched_scan_req; |
81256969 | 1004 | |
24d584d7 | 1005 | ASSERT_RTNL(); |
f04c2203 | 1006 | ASSERT_WDEV_LOCK(wdev); |
24d584d7 | 1007 | |
81256969 SG |
1008 | switch (wdev->iftype) { |
1009 | case NL80211_IFTYPE_ADHOC: | |
f04c2203 | 1010 | __cfg80211_leave_ibss(rdev, dev, true); |
81256969 SG |
1011 | break; |
1012 | case NL80211_IFTYPE_P2P_CLIENT: | |
1013 | case NL80211_IFTYPE_STATION: | |
31a60ed1 JR |
1014 | sched_scan_req = rtnl_dereference(rdev->sched_scan_req); |
1015 | if (sched_scan_req && dev == sched_scan_req->dev) | |
24d584d7 | 1016 | __cfg80211_stop_sched_scan(rdev, false); |
81256969 | 1017 | |
81256969 SG |
1018 | #ifdef CONFIG_CFG80211_WEXT |
1019 | kfree(wdev->wext.ie); | |
1020 | wdev->wext.ie = NULL; | |
1021 | wdev->wext.ie_len = 0; | |
1022 | wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; | |
1023 | #endif | |
83739b03 JB |
1024 | cfg80211_disconnect(rdev, dev, |
1025 | WLAN_REASON_DEAUTH_LEAVING, true); | |
81256969 SG |
1026 | break; |
1027 | case NL80211_IFTYPE_MESH_POINT: | |
f04c2203 | 1028 | __cfg80211_leave_mesh(rdev, dev); |
81256969 SG |
1029 | break; |
1030 | case NL80211_IFTYPE_AP: | |
74418ede | 1031 | case NL80211_IFTYPE_P2P_GO: |
f04c2203 | 1032 | __cfg80211_stop_ap(rdev, dev, true); |
81256969 | 1033 | break; |
6e0bd6c3 RL |
1034 | case NL80211_IFTYPE_OCB: |
1035 | __cfg80211_leave_ocb(rdev, dev); | |
1036 | break; | |
de4fcbad JB |
1037 | case NL80211_IFTYPE_WDS: |
1038 | /* must be handled by mac80211/driver, has no APIs */ | |
1039 | break; | |
1040 | case NL80211_IFTYPE_P2P_DEVICE: | |
cb3b7d87 | 1041 | case NL80211_IFTYPE_NAN: |
de4fcbad JB |
1042 | /* cannot happen, has no netdev */ |
1043 | break; | |
1044 | case NL80211_IFTYPE_AP_VLAN: | |
1045 | case NL80211_IFTYPE_MONITOR: | |
1046 | /* nothing to do */ | |
1047 | break; | |
1048 | case NL80211_IFTYPE_UNSPECIFIED: | |
1049 | case NUM_NL80211_IFTYPES: | |
1050 | /* invalid */ | |
81256969 SG |
1051 | break; |
1052 | } | |
81256969 SG |
1053 | } |
1054 | ||
f04c2203 MK |
1055 | void cfg80211_leave(struct cfg80211_registered_device *rdev, |
1056 | struct wireless_dev *wdev) | |
1057 | { | |
1058 | wdev_lock(wdev); | |
1059 | __cfg80211_leave(rdev, wdev); | |
1060 | wdev_unlock(wdev); | |
1061 | } | |
1062 | ||
1063 | void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev, | |
1064 | gfp_t gfp) | |
1065 | { | |
1066 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); | |
1067 | struct cfg80211_event *ev; | |
1068 | unsigned long flags; | |
1069 | ||
1070 | trace_cfg80211_stop_iface(wiphy, wdev); | |
1071 | ||
1072 | ev = kzalloc(sizeof(*ev), gfp); | |
1073 | if (!ev) | |
1074 | return; | |
1075 | ||
1076 | ev->type = EVENT_STOPPED; | |
1077 | ||
1078 | spin_lock_irqsave(&wdev->event_lock, flags); | |
1079 | list_add_tail(&ev->list, &wdev->event_list); | |
1080 | spin_unlock_irqrestore(&wdev->event_lock, flags); | |
1081 | queue_work(cfg80211_wq, &rdev->event_work); | |
1082 | } | |
1083 | EXPORT_SYMBOL(cfg80211_stop_iface); | |
1084 | ||
c4f60846 | 1085 | static int cfg80211_netdev_notifier_call(struct notifier_block *nb, |
351638e7 | 1086 | unsigned long state, void *ptr) |
704232c2 | 1087 | { |
351638e7 | 1088 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
2a783c13 | 1089 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
704232c2 | 1090 | struct cfg80211_registered_device *rdev; |
31a60ed1 | 1091 | struct cfg80211_sched_scan_request *sched_scan_req; |
704232c2 | 1092 | |
2a783c13 | 1093 | if (!wdev) |
1f87f7d3 | 1094 | return NOTIFY_DONE; |
704232c2 | 1095 | |
f26cbf40 | 1096 | rdev = wiphy_to_rdev(wdev->wiphy); |
704232c2 | 1097 | |
2a783c13 | 1098 | WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); |
60719ffd | 1099 | |
704232c2 | 1100 | switch (state) { |
053a93dd MH |
1101 | case NETDEV_POST_INIT: |
1102 | SET_NETDEV_DEVTYPE(dev, &wiphy_type); | |
1103 | break; | |
704232c2 | 1104 | case NETDEV_REGISTER: |
0ff6ce7b JB |
1105 | /* |
1106 | * NB: cannot take rdev->mtx here because this may be | |
1107 | * called within code protected by it when interfaces | |
1108 | * are added with nl80211. | |
1109 | */ | |
667503dd JB |
1110 | mutex_init(&wdev->mtx); |
1111 | INIT_LIST_HEAD(&wdev->event_list); | |
1112 | spin_lock_init(&wdev->event_lock); | |
2e161f78 JB |
1113 | INIT_LIST_HEAD(&wdev->mgmt_registrations); |
1114 | spin_lock_init(&wdev->mgmt_registrations_lock); | |
026331c4 | 1115 | |
89a54e48 | 1116 | wdev->identifier = ++rdev->wdev_id; |
53873f13 | 1117 | list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list); |
f5ea9120 | 1118 | rdev->devlist_generation++; |
463d0183 JB |
1119 | /* can only change netns with wiphy */ |
1120 | dev->features |= NETIF_F_NETNS_LOCAL; | |
1121 | ||
704232c2 JB |
1122 | if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj, |
1123 | "phy80211")) { | |
e9c0268f | 1124 | pr_err("failed to add phy80211 symlink to netdev!\n"); |
704232c2 | 1125 | } |
2a783c13 | 1126 | wdev->netdev = dev; |
3d23e349 | 1127 | #ifdef CONFIG_CFG80211_WEXT |
2a783c13 JB |
1128 | wdev->wext.default_key = -1; |
1129 | wdev->wext.default_mgmt_key = -1; | |
f2129354 | 1130 | wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; |
ffb9eb3d KV |
1131 | #endif |
1132 | ||
5be83de5 | 1133 | if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT) |
ffb9eb3d | 1134 | wdev->ps = true; |
5be83de5 | 1135 | else |
ffb9eb3d | 1136 | wdev->ps = false; |
9043f3b8 JO |
1137 | /* allow mac80211 to determine the timeout */ |
1138 | wdev->ps_timeout = -1; | |
ffb9eb3d | 1139 | |
ad4bb6f8 | 1140 | if ((wdev->iftype == NL80211_IFTYPE_STATION || |
074ac8df | 1141 | wdev->iftype == NL80211_IFTYPE_P2P_CLIENT || |
ad4bb6f8 JB |
1142 | wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr) |
1143 | dev->priv_flags |= IFF_DONT_BRIDGE; | |
896ff063 DK |
1144 | |
1145 | nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE); | |
704232c2 | 1146 | break; |
04a773ad | 1147 | case NETDEV_GOING_DOWN: |
81256969 | 1148 | cfg80211_leave(rdev, wdev); |
01a0ac41 JB |
1149 | break; |
1150 | case NETDEV_DOWN: | |
dbbae26a | 1151 | cfg80211_update_iface_num(rdev, wdev->iftype, -1); |
a617302c JB |
1152 | if (rdev->scan_req && rdev->scan_req->wdev == wdev) { |
1153 | if (WARN_ON(!rdev->scan_req->notified)) | |
1d76250b | 1154 | rdev->scan_req->info.aborted = true; |
f9d15d16 | 1155 | ___cfg80211_scan_done(rdev, false); |
a617302c | 1156 | } |
5fe231e8 | 1157 | |
31a60ed1 JR |
1158 | sched_scan_req = rtnl_dereference(rdev->sched_scan_req); |
1159 | if (WARN_ON(sched_scan_req && | |
1160 | sched_scan_req->dev == wdev->netdev)) { | |
5fe231e8 JB |
1161 | __cfg80211_stop_sched_scan(rdev, false); |
1162 | } | |
1163 | ||
1164 | rdev->opencount--; | |
1165 | wake_up(&rdev->dev_wait); | |
04a773ad JB |
1166 | break; |
1167 | case NETDEV_UP: | |
4290cb4b | 1168 | cfg80211_update_iface_num(rdev, wdev->iftype, 1); |
667503dd | 1169 | wdev_lock(wdev); |
f2129354 | 1170 | switch (wdev->iftype) { |
29cbe68c | 1171 | #ifdef CONFIG_CFG80211_WEXT |
f2129354 | 1172 | case NL80211_IFTYPE_ADHOC: |
fffd0934 | 1173 | cfg80211_ibss_wext_join(rdev, wdev); |
04a773ad | 1174 | break; |
f2129354 | 1175 | case NL80211_IFTYPE_STATION: |
fffd0934 | 1176 | cfg80211_mgd_wext_connect(rdev, wdev); |
f2129354 | 1177 | break; |
29cbe68c | 1178 | #endif |
c80d545d | 1179 | #ifdef CONFIG_MAC80211_MESH |
29cbe68c | 1180 | case NL80211_IFTYPE_MESH_POINT: |
c80d545d JC |
1181 | { |
1182 | /* backward compat code... */ | |
1183 | struct mesh_setup setup; | |
1184 | memcpy(&setup, &default_mesh_setup, | |
1185 | sizeof(setup)); | |
1186 | /* back compat only needed for mesh_id */ | |
1187 | setup.mesh_id = wdev->ssid; | |
1188 | setup.mesh_id_len = wdev->mesh_id_up_len; | |
1189 | if (wdev->mesh_id_up_len) | |
1190 | __cfg80211_join_mesh(rdev, dev, | |
1191 | &setup, | |
1192 | &default_mesh_config); | |
1193 | break; | |
1194 | } | |
1195 | #endif | |
f2129354 | 1196 | default: |
04a773ad | 1197 | break; |
f2129354 | 1198 | } |
667503dd | 1199 | wdev_unlock(wdev); |
ad002395 | 1200 | rdev->opencount++; |
bf6a0579 JO |
1201 | |
1202 | /* | |
1203 | * Configure power management to the driver here so that its | |
1204 | * correctly set also after interface type changes etc. | |
1205 | */ | |
5966f2dd EP |
1206 | if ((wdev->iftype == NL80211_IFTYPE_STATION || |
1207 | wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) && | |
bf6a0579 | 1208 | rdev->ops->set_power_mgmt) |
e35e4d28 HG |
1209 | if (rdev_set_power_mgmt(rdev, dev, wdev->ps, |
1210 | wdev->ps_timeout)) { | |
bf6a0579 JO |
1211 | /* assume this means it's off */ |
1212 | wdev->ps = false; | |
1213 | } | |
2a783c13 | 1214 | break; |
704232c2 | 1215 | case NETDEV_UNREGISTER: |
e40cbdac JB |
1216 | /* |
1217 | * It is possible to get NETDEV_UNREGISTER | |
1218 | * multiple times. To detect that, check | |
1219 | * that the interface is still on the list | |
1220 | * of registered interfaces, and only then | |
1221 | * remove and clean it up. | |
1222 | */ | |
2a783c13 | 1223 | if (!list_empty(&wdev->list)) { |
7f8ed01e DK |
1224 | nl80211_notify_iface(rdev, wdev, |
1225 | NL80211_CMD_DEL_INTERFACE); | |
704232c2 | 1226 | sysfs_remove_link(&dev->dev.kobj, "phy80211"); |
5f2aa25e | 1227 | list_del_rcu(&wdev->list); |
f5ea9120 | 1228 | rdev->devlist_generation++; |
2e161f78 | 1229 | cfg80211_mlme_purge_registrations(wdev); |
3d23e349 | 1230 | #ifdef CONFIG_CFG80211_WEXT |
538c9eb8 | 1231 | kzfree(wdev->wext.keys); |
fffd0934 | 1232 | #endif |
e40cbdac | 1233 | } |
5f2aa25e JB |
1234 | /* |
1235 | * synchronise (so that we won't find this netdev | |
1236 | * from other code any more) and then clear the list | |
1237 | * head so that the above code can safely check for | |
1238 | * !list_empty() to avoid double-cleanup. | |
1239 | */ | |
1240 | synchronize_rcu(); | |
1241 | INIT_LIST_HEAD(&wdev->list); | |
1f6fc43e DD |
1242 | /* |
1243 | * Ensure that all events have been processed and | |
1244 | * freed. | |
1245 | */ | |
1246 | cfg80211_process_wdev_events(wdev); | |
f9bef3df BG |
1247 | |
1248 | if (WARN_ON(wdev->current_bss)) { | |
1249 | cfg80211_unhold_bss(wdev->current_bss); | |
1250 | cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); | |
1251 | wdev->current_bss = NULL; | |
1252 | } | |
704232c2 | 1253 | break; |
1f87f7d3 | 1254 | case NETDEV_PRE_UP: |
0b20633d JB |
1255 | if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype))) |
1256 | return notifier_from_errno(-EOPNOTSUPP); | |
b6a55015 LC |
1257 | if (rfkill_blocked(rdev->rfkill)) |
1258 | return notifier_from_errno(-ERFKILL); | |
1f87f7d3 | 1259 | break; |
6784c7db ZG |
1260 | default: |
1261 | return NOTIFY_DONE; | |
704232c2 JB |
1262 | } |
1263 | ||
cb150b9d JB |
1264 | wireless_nlevent_flush(); |
1265 | ||
6784c7db | 1266 | return NOTIFY_OK; |
704232c2 JB |
1267 | } |
1268 | ||
1269 | static struct notifier_block cfg80211_netdev_notifier = { | |
1270 | .notifier_call = cfg80211_netdev_notifier_call, | |
1271 | }; | |
1272 | ||
463d0183 JB |
1273 | static void __net_exit cfg80211_pernet_exit(struct net *net) |
1274 | { | |
1275 | struct cfg80211_registered_device *rdev; | |
1276 | ||
1277 | rtnl_lock(); | |
463d0183 JB |
1278 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1279 | if (net_eq(wiphy_net(&rdev->wiphy), net)) | |
1280 | WARN_ON(cfg80211_switch_netns(rdev, &init_net)); | |
1281 | } | |
463d0183 JB |
1282 | rtnl_unlock(); |
1283 | } | |
1284 | ||
1285 | static struct pernet_operations cfg80211_pernet_ops = { | |
1286 | .exit = cfg80211_pernet_exit, | |
1287 | }; | |
1288 | ||
1289 | static int __init cfg80211_init(void) | |
704232c2 | 1290 | { |
b2e1b302 LR |
1291 | int err; |
1292 | ||
463d0183 JB |
1293 | err = register_pernet_device(&cfg80211_pernet_ops); |
1294 | if (err) | |
1295 | goto out_fail_pernet; | |
1296 | ||
b2e1b302 | 1297 | err = wiphy_sysfs_init(); |
704232c2 JB |
1298 | if (err) |
1299 | goto out_fail_sysfs; | |
1300 | ||
1301 | err = register_netdevice_notifier(&cfg80211_netdev_notifier); | |
1302 | if (err) | |
1303 | goto out_fail_notifier; | |
1304 | ||
55682965 JB |
1305 | err = nl80211_init(); |
1306 | if (err) | |
1307 | goto out_fail_nl80211; | |
1308 | ||
704232c2 JB |
1309 | ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); |
1310 | ||
b2e1b302 LR |
1311 | err = regulatory_init(); |
1312 | if (err) | |
1313 | goto out_fail_reg; | |
1314 | ||
e4819013 | 1315 | cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM); |
f00f188f WY |
1316 | if (!cfg80211_wq) { |
1317 | err = -ENOMEM; | |
e60d7443 | 1318 | goto out_fail_wq; |
f00f188f | 1319 | } |
e60d7443 | 1320 | |
704232c2 JB |
1321 | return 0; |
1322 | ||
e60d7443 AB |
1323 | out_fail_wq: |
1324 | regulatory_exit(); | |
b2e1b302 LR |
1325 | out_fail_reg: |
1326 | debugfs_remove(ieee80211_debugfs_dir); | |
81daf735 | 1327 | nl80211_exit(); |
55682965 JB |
1328 | out_fail_nl80211: |
1329 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); | |
704232c2 JB |
1330 | out_fail_notifier: |
1331 | wiphy_sysfs_exit(); | |
1332 | out_fail_sysfs: | |
463d0183 JB |
1333 | unregister_pernet_device(&cfg80211_pernet_ops); |
1334 | out_fail_pernet: | |
704232c2 JB |
1335 | return err; |
1336 | } | |
3a462465 | 1337 | subsys_initcall(cfg80211_init); |
704232c2 | 1338 | |
f884e387 | 1339 | static void __exit cfg80211_exit(void) |
704232c2 JB |
1340 | { |
1341 | debugfs_remove(ieee80211_debugfs_dir); | |
55682965 | 1342 | nl80211_exit(); |
704232c2 JB |
1343 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); |
1344 | wiphy_sysfs_exit(); | |
b2e1b302 | 1345 | regulatory_exit(); |
463d0183 | 1346 | unregister_pernet_device(&cfg80211_pernet_ops); |
e60d7443 | 1347 | destroy_workqueue(cfg80211_wq); |
704232c2 JB |
1348 | } |
1349 | module_exit(cfg80211_exit); |