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 |
704232c2 JB |
6 | */ |
7 | ||
e9c0268f JP |
8 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
9 | ||
704232c2 JB |
10 | #include <linux/if.h> |
11 | #include <linux/module.h> | |
12 | #include <linux/err.h> | |
704232c2 | 13 | #include <linux/list.h> |
5a0e3ad6 | 14 | #include <linux/slab.h> |
704232c2 JB |
15 | #include <linux/nl80211.h> |
16 | #include <linux/debugfs.h> | |
17 | #include <linux/notifier.h> | |
18 | #include <linux/device.h> | |
16a832e7 | 19 | #include <linux/etherdevice.h> |
1f87f7d3 | 20 | #include <linux/rtnetlink.h> |
d43c36dc | 21 | #include <linux/sched.h> |
704232c2 JB |
22 | #include <net/genetlink.h> |
23 | #include <net/cfg80211.h> | |
55682965 | 24 | #include "nl80211.h" |
704232c2 JB |
25 | #include "core.h" |
26 | #include "sysfs.h" | |
1ac61302 | 27 | #include "debugfs.h" |
a9a11622 | 28 | #include "wext-compat.h" |
e35e4d28 | 29 | #include "rdev-ops.h" |
704232c2 JB |
30 | |
31 | /* name for sysfs, %d is appended */ | |
32 | #define PHY_NAME "phy" | |
33 | ||
34 | MODULE_AUTHOR("Johannes Berg"); | |
35 | MODULE_LICENSE("GPL"); | |
36 | MODULE_DESCRIPTION("wireless configuration support"); | |
fb4e1568 | 37 | MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME); |
704232c2 | 38 | |
5fe231e8 | 39 | /* RCU-protected (and RTNL for writers) */ |
79c97e97 | 40 | LIST_HEAD(cfg80211_rdev_list); |
f5ea9120 | 41 | int cfg80211_rdev_list_generation; |
a1794390 | 42 | |
704232c2 JB |
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 | ||
79c97e97 | 54 | struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx) |
55682965 | 55 | { |
79c97e97 | 56 | struct cfg80211_registered_device *result = NULL, *rdev; |
55682965 | 57 | |
5fe231e8 | 58 | ASSERT_RTNL(); |
761cf7ec | 59 | |
79c97e97 JB |
60 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
61 | if (rdev->wiphy_idx == wiphy_idx) { | |
62 | result = rdev; | |
55682965 JB |
63 | break; |
64 | } | |
65 | } | |
66 | ||
67 | return result; | |
68 | } | |
69 | ||
806a9e39 LR |
70 | int get_wiphy_idx(struct wiphy *wiphy) |
71 | { | |
f26cbf40 | 72 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
f4173766 | 73 | |
79c97e97 | 74 | return rdev->wiphy_idx; |
806a9e39 LR |
75 | } |
76 | ||
806a9e39 LR |
77 | struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx) |
78 | { | |
79c97e97 | 79 | struct cfg80211_registered_device *rdev; |
806a9e39 | 80 | |
5fe231e8 | 81 | ASSERT_RTNL(); |
806a9e39 | 82 | |
79c97e97 JB |
83 | rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx); |
84 | if (!rdev) | |
806a9e39 | 85 | return NULL; |
79c97e97 | 86 | return &rdev->wiphy; |
806a9e39 LR |
87 | } |
88 | ||
1998d90a BG |
89 | static int cfg80211_dev_check_name(struct cfg80211_registered_device *rdev, |
90 | const char *newname) | |
55682965 | 91 | { |
79c97e97 | 92 | struct cfg80211_registered_device *rdev2; |
1998d90a | 93 | int wiphy_idx, taken = -1, digits; |
55682965 | 94 | |
5fe231e8 | 95 | ASSERT_RTNL(); |
2940bb69 | 96 | |
7623225f JB |
97 | /* prohibit calling the thing phy%d when %d is not its number */ |
98 | sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken); | |
99 | if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) { | |
100 | /* count number of places needed to print wiphy_idx */ | |
101 | digits = 1; | |
102 | while (wiphy_idx /= 10) | |
103 | digits++; | |
104 | /* | |
105 | * deny the name if it is phy<idx> where <idx> is printed | |
106 | * without leading zeroes. taken == strlen(newname) here | |
107 | */ | |
108 | if (taken == strlen(PHY_NAME) + digits) | |
109 | return -EINVAL; | |
110 | } | |
111 | ||
1998d90a BG |
112 | /* Ensure another device does not already have this name. */ |
113 | list_for_each_entry(rdev2, &cfg80211_rdev_list, list) | |
114 | if (strcmp(newname, wiphy_name(&rdev2->wiphy)) == 0) | |
115 | return -EINVAL; | |
116 | ||
117 | return 0; | |
118 | } | |
119 | ||
120 | int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, | |
121 | char *newname) | |
122 | { | |
123 | int result; | |
124 | ||
125 | ASSERT_RTNL(); | |
7623225f | 126 | |
2940bb69 | 127 | /* Ignore nop renames */ |
1998d90a | 128 | if (strcmp(newname, wiphy_name(&rdev->wiphy)) == 0) |
4bbf4d56 | 129 | return 0; |
2940bb69 | 130 | |
1998d90a BG |
131 | result = cfg80211_dev_check_name(rdev, newname); |
132 | if (result < 0) | |
133 | return result; | |
55682965 | 134 | |
55682965 JB |
135 | result = device_rename(&rdev->wiphy.dev, newname); |
136 | if (result) | |
4bbf4d56 | 137 | return result; |
55682965 | 138 | |
33c0360b JB |
139 | if (rdev->wiphy.debugfsdir && |
140 | !debugfs_rename(rdev->wiphy.debugfsdir->d_parent, | |
55682965 JB |
141 | rdev->wiphy.debugfsdir, |
142 | rdev->wiphy.debugfsdir->d_parent, | |
143 | newname)) | |
e9c0268f | 144 | pr_err("failed to rename debugfs dir to %s!\n", newname); |
55682965 | 145 | |
3bb20556 | 146 | nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); |
55682965 | 147 | |
4bbf4d56 | 148 | return 0; |
55682965 JB |
149 | } |
150 | ||
463d0183 JB |
151 | int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, |
152 | struct net *net) | |
153 | { | |
154 | struct wireless_dev *wdev; | |
155 | int err = 0; | |
156 | ||
5be83de5 | 157 | if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK)) |
463d0183 JB |
158 | return -EOPNOTSUPP; |
159 | ||
89a54e48 | 160 | list_for_each_entry(wdev, &rdev->wdev_list, list) { |
ba22fb5b JB |
161 | if (!wdev->netdev) |
162 | continue; | |
463d0183 JB |
163 | wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; |
164 | err = dev_change_net_namespace(wdev->netdev, net, "wlan%d"); | |
165 | if (err) | |
166 | break; | |
167 | wdev->netdev->features |= NETIF_F_NETNS_LOCAL; | |
168 | } | |
169 | ||
170 | if (err) { | |
171 | /* failed -- clean up to old netns */ | |
172 | net = wiphy_net(&rdev->wiphy); | |
173 | ||
89a54e48 | 174 | list_for_each_entry_continue_reverse(wdev, &rdev->wdev_list, |
463d0183 | 175 | list) { |
ba22fb5b JB |
176 | if (!wdev->netdev) |
177 | continue; | |
463d0183 JB |
178 | wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; |
179 | err = dev_change_net_namespace(wdev->netdev, net, | |
180 | "wlan%d"); | |
181 | WARN_ON(err); | |
182 | wdev->netdev->features |= NETIF_F_NETNS_LOCAL; | |
183 | } | |
04600794 JB |
184 | |
185 | return err; | |
463d0183 JB |
186 | } |
187 | ||
188 | wiphy_net_set(&rdev->wiphy, net); | |
189 | ||
04600794 JB |
190 | err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev)); |
191 | WARN_ON(err); | |
192 | ||
193 | return 0; | |
463d0183 JB |
194 | } |
195 | ||
1f87f7d3 JB |
196 | static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data) |
197 | { | |
79c97e97 | 198 | struct cfg80211_registered_device *rdev = data; |
1f87f7d3 | 199 | |
e35e4d28 | 200 | rdev_rfkill_poll(rdev); |
1f87f7d3 JB |
201 | } |
202 | ||
f9f47529 JB |
203 | void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, |
204 | struct wireless_dev *wdev) | |
205 | { | |
5fe231e8 | 206 | ASSERT_RTNL(); |
f9f47529 JB |
207 | |
208 | if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)) | |
209 | return; | |
210 | ||
211 | if (!wdev->p2p_started) | |
212 | return; | |
213 | ||
214 | rdev_stop_p2p_device(rdev, wdev); | |
215 | wdev->p2p_started = false; | |
216 | ||
217 | rdev->opencount--; | |
218 | ||
a617302c JB |
219 | if (rdev->scan_req && rdev->scan_req->wdev == wdev) { |
220 | if (WARN_ON(!rdev->scan_req->notified)) | |
221 | rdev->scan_req->aborted = true; | |
f9d15d16 | 222 | ___cfg80211_scan_done(rdev, false); |
a617302c | 223 | } |
f9f47529 JB |
224 | } |
225 | ||
f6837ba8 | 226 | void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy) |
1f87f7d3 | 227 | { |
f6837ba8 | 228 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
1f87f7d3 JB |
229 | struct wireless_dev *wdev; |
230 | ||
f6837ba8 | 231 | ASSERT_RTNL(); |
f9f47529 | 232 | |
98104fde JB |
233 | list_for_each_entry(wdev, &rdev->wdev_list, list) { |
234 | if (wdev->netdev) { | |
ba22fb5b | 235 | dev_close(wdev->netdev); |
98104fde JB |
236 | continue; |
237 | } | |
238 | /* otherwise, check iftype */ | |
239 | switch (wdev->iftype) { | |
240 | case NL80211_IFTYPE_P2P_DEVICE: | |
f9f47529 | 241 | cfg80211_stop_p2p_device(rdev, wdev); |
98104fde JB |
242 | break; |
243 | default: | |
244 | break; | |
245 | } | |
246 | } | |
f6837ba8 JB |
247 | } |
248 | EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces); | |
1f87f7d3 | 249 | |
f6837ba8 JB |
250 | static int cfg80211_rfkill_set_block(void *data, bool blocked) |
251 | { | |
252 | struct cfg80211_registered_device *rdev = data; | |
253 | ||
254 | if (!blocked) | |
255 | return 0; | |
256 | ||
257 | rtnl_lock(); | |
258 | cfg80211_shutdown_all_interfaces(&rdev->wiphy); | |
1f87f7d3 JB |
259 | rtnl_unlock(); |
260 | ||
261 | return 0; | |
262 | } | |
263 | ||
264 | static void cfg80211_rfkill_sync_work(struct work_struct *work) | |
265 | { | |
79c97e97 | 266 | struct cfg80211_registered_device *rdev; |
1f87f7d3 | 267 | |
79c97e97 JB |
268 | rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync); |
269 | cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill)); | |
1f87f7d3 JB |
270 | } |
271 | ||
667503dd JB |
272 | static void cfg80211_event_work(struct work_struct *work) |
273 | { | |
274 | struct cfg80211_registered_device *rdev; | |
667503dd JB |
275 | |
276 | rdev = container_of(work, struct cfg80211_registered_device, | |
277 | event_work); | |
278 | ||
279 | rtnl_lock(); | |
3d54d255 | 280 | cfg80211_process_rdev_events(rdev); |
667503dd JB |
281 | rtnl_unlock(); |
282 | } | |
283 | ||
78f22b6a JB |
284 | void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev) |
285 | { | |
286 | struct cfg80211_iface_destroy *item; | |
287 | ||
288 | ASSERT_RTNL(); | |
289 | ||
290 | spin_lock_irq(&rdev->destroy_list_lock); | |
291 | while ((item = list_first_entry_or_null(&rdev->destroy_list, | |
292 | struct cfg80211_iface_destroy, | |
293 | list))) { | |
294 | struct wireless_dev *wdev, *tmp; | |
295 | u32 nlportid = item->nlportid; | |
296 | ||
297 | list_del(&item->list); | |
298 | kfree(item); | |
299 | spin_unlock_irq(&rdev->destroy_list_lock); | |
300 | ||
301 | list_for_each_entry_safe(wdev, tmp, &rdev->wdev_list, list) { | |
302 | if (nlportid == wdev->owner_nlportid) | |
303 | rdev_del_virtual_intf(rdev, wdev); | |
304 | } | |
305 | ||
306 | spin_lock_irq(&rdev->destroy_list_lock); | |
307 | } | |
308 | spin_unlock_irq(&rdev->destroy_list_lock); | |
309 | } | |
310 | ||
311 | static void cfg80211_destroy_iface_wk(struct work_struct *work) | |
312 | { | |
313 | struct cfg80211_registered_device *rdev; | |
314 | ||
315 | rdev = container_of(work, struct cfg80211_registered_device, | |
316 | destroy_work); | |
317 | ||
318 | rtnl_lock(); | |
319 | cfg80211_destroy_ifaces(rdev); | |
320 | rtnl_unlock(); | |
321 | } | |
322 | ||
93a1e86c JR |
323 | static void cfg80211_sched_scan_stop_wk(struct work_struct *work) |
324 | { | |
325 | struct cfg80211_registered_device *rdev; | |
326 | ||
327 | rdev = container_of(work, struct cfg80211_registered_device, | |
328 | sched_scan_stop_wk); | |
329 | ||
330 | rtnl_lock(); | |
331 | ||
332 | __cfg80211_stop_sched_scan(rdev, false); | |
333 | ||
334 | rtnl_unlock(); | |
335 | } | |
336 | ||
704232c2 JB |
337 | /* exported functions */ |
338 | ||
1998d90a BG |
339 | struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv, |
340 | const char *requested_name) | |
704232c2 | 341 | { |
73810b77 | 342 | static atomic_t wiphy_counter = ATOMIC_INIT(0); |
7623225f JB |
343 | |
344 | struct cfg80211_registered_device *rdev; | |
704232c2 JB |
345 | int alloc_size; |
346 | ||
0b20633d JB |
347 | WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key)); |
348 | WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc)); | |
349 | WARN_ON(ops->connect && !ops->disconnect); | |
350 | WARN_ON(ops->join_ibss && !ops->leave_ibss); | |
351 | WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf); | |
352 | WARN_ON(ops->add_station && !ops->del_station); | |
353 | WARN_ON(ops->add_mpath && !ops->del_mpath); | |
29cbe68c | 354 | WARN_ON(ops->join_mesh && !ops->leave_mesh); |
41ade00f | 355 | |
79c97e97 | 356 | alloc_size = sizeof(*rdev) + sizeof_priv; |
704232c2 | 357 | |
79c97e97 JB |
358 | rdev = kzalloc(alloc_size, GFP_KERNEL); |
359 | if (!rdev) | |
704232c2 JB |
360 | return NULL; |
361 | ||
79c97e97 | 362 | rdev->ops = ops; |
704232c2 | 363 | |
73810b77 | 364 | rdev->wiphy_idx = atomic_inc_return(&wiphy_counter); |
a4d73ee1 | 365 | |
f4173766 | 366 | if (unlikely(rdev->wiphy_idx < 0)) { |
7623225f | 367 | /* ugh, wrapped! */ |
73810b77 | 368 | atomic_dec(&wiphy_counter); |
79c97e97 | 369 | kfree(rdev); |
704232c2 JB |
370 | return NULL; |
371 | } | |
704232c2 | 372 | |
9b881963 JB |
373 | /* atomic_inc_return makes it start at 1, make it start at 0 */ |
374 | rdev->wiphy_idx--; | |
375 | ||
7623225f | 376 | /* give it a proper name */ |
1998d90a BG |
377 | if (requested_name && requested_name[0]) { |
378 | int rv; | |
379 | ||
380 | rtnl_lock(); | |
381 | rv = cfg80211_dev_check_name(rdev, requested_name); | |
382 | ||
383 | if (rv < 0) { | |
384 | rtnl_unlock(); | |
385 | goto use_default_name; | |
386 | } | |
387 | ||
388 | rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name); | |
389 | rtnl_unlock(); | |
390 | if (rv) | |
391 | goto use_default_name; | |
392 | } else { | |
393 | use_default_name: | |
394 | /* NOTE: This is *probably* safe w/out holding rtnl because of | |
395 | * the restrictions on phy names. Probably this call could | |
396 | * fail if some other part of the kernel (re)named a device | |
397 | * phyX. But, might should add some locking and check return | |
398 | * value, and use a different name if this one exists? | |
399 | */ | |
400 | dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx); | |
401 | } | |
7623225f | 402 | |
89a54e48 | 403 | INIT_LIST_HEAD(&rdev->wdev_list); |
37c73b5f BG |
404 | INIT_LIST_HEAD(&rdev->beacon_registrations); |
405 | spin_lock_init(&rdev->beacon_registrations_lock); | |
79c97e97 JB |
406 | spin_lock_init(&rdev->bss_lock); |
407 | INIT_LIST_HEAD(&rdev->bss_list); | |
408 | INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done); | |
807f8a8c | 409 | INIT_WORK(&rdev->sched_scan_results_wk, __cfg80211_sched_scan_results); |
33d8783c JB |
410 | INIT_LIST_HEAD(&rdev->mlme_unreg); |
411 | spin_lock_init(&rdev->mlme_unreg_lock); | |
412 | INIT_WORK(&rdev->mlme_unreg_wk, cfg80211_mlme_unreg_wk); | |
04f39047 SW |
413 | INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk, |
414 | cfg80211_dfs_channels_update_work); | |
3d23e349 JB |
415 | #ifdef CONFIG_CFG80211_WEXT |
416 | rdev->wiphy.wext = &cfg80211_wext_handler; | |
417 | #endif | |
418 | ||
79c97e97 JB |
419 | device_initialize(&rdev->wiphy.dev); |
420 | rdev->wiphy.dev.class = &ieee80211_class; | |
421 | rdev->wiphy.dev.platform_data = rdev; | |
9f0e1354 | 422 | device_enable_async_suspend(&rdev->wiphy.dev); |
79c97e97 | 423 | |
78f22b6a JB |
424 | INIT_LIST_HEAD(&rdev->destroy_list); |
425 | spin_lock_init(&rdev->destroy_list_lock); | |
426 | INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk); | |
93a1e86c | 427 | INIT_WORK(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk); |
78f22b6a | 428 | |
5be83de5 JB |
429 | #ifdef CONFIG_CFG80211_DEFAULT_PS |
430 | rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; | |
431 | #endif | |
16cb9d42 | 432 | |
463d0183 JB |
433 | wiphy_net_set(&rdev->wiphy, &init_net); |
434 | ||
79c97e97 JB |
435 | rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block; |
436 | rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev), | |
437 | &rdev->wiphy.dev, RFKILL_TYPE_WLAN, | |
438 | &rdev->rfkill_ops, rdev); | |
439 | ||
440 | if (!rdev->rfkill) { | |
441 | kfree(rdev); | |
1f87f7d3 JB |
442 | return NULL; |
443 | } | |
444 | ||
79c97e97 JB |
445 | INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work); |
446 | INIT_WORK(&rdev->conn_work, cfg80211_conn_work); | |
447 | INIT_WORK(&rdev->event_work, cfg80211_event_work); | |
1f87f7d3 | 448 | |
ad002395 JB |
449 | init_waitqueue_head(&rdev->dev_wait); |
450 | ||
b9a5f8ca JM |
451 | /* |
452 | * Initialize wiphy parameters to IEEE 802.11 MIB default values. | |
453 | * Fragmentation and RTS threshold are disabled by default with the | |
454 | * special -1 value. | |
455 | */ | |
79c97e97 JB |
456 | rdev->wiphy.retry_short = 7; |
457 | rdev->wiphy.retry_long = 4; | |
458 | rdev->wiphy.frag_threshold = (u32) -1; | |
459 | rdev->wiphy.rts_threshold = (u32) -1; | |
81077e82 | 460 | rdev->wiphy.coverage_class = 0; |
b9a5f8ca | 461 | |
9a774c78 AO |
462 | rdev->wiphy.max_num_csa_counters = 1; |
463 | ||
3b06d277 AS |
464 | rdev->wiphy.max_sched_scan_plans = 1; |
465 | rdev->wiphy.max_sched_scan_plan_interval = U32_MAX; | |
466 | ||
79c97e97 | 467 | return &rdev->wiphy; |
704232c2 | 468 | } |
1998d90a | 469 | EXPORT_SYMBOL(wiphy_new_nm); |
704232c2 | 470 | |
7527a782 JB |
471 | static int wiphy_verify_combinations(struct wiphy *wiphy) |
472 | { | |
473 | const struct ieee80211_iface_combination *c; | |
474 | int i, j; | |
475 | ||
7527a782 JB |
476 | for (i = 0; i < wiphy->n_iface_combinations; i++) { |
477 | u32 cnt = 0; | |
478 | u16 all_iftypes = 0; | |
479 | ||
480 | c = &wiphy->iface_combinations[i]; | |
481 | ||
11c4a075 SW |
482 | /* |
483 | * Combinations with just one interface aren't real, | |
484 | * however we make an exception for DFS. | |
485 | */ | |
486 | if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths)) | |
7527a782 JB |
487 | return -EINVAL; |
488 | ||
489 | /* Need at least one channel */ | |
490 | if (WARN_ON(!c->num_different_channels)) | |
491 | return -EINVAL; | |
492 | ||
d4e50c59 MK |
493 | /* |
494 | * Put a sane limit on maximum number of different | |
495 | * channels to simplify channel accounting code. | |
496 | */ | |
497 | if (WARN_ON(c->num_different_channels > | |
498 | CFG80211_MAX_NUM_DIFFERENT_CHANNELS)) | |
499 | return -EINVAL; | |
500 | ||
11c4a075 SW |
501 | /* DFS only works on one channel. */ |
502 | if (WARN_ON(c->radar_detect_widths && | |
503 | (c->num_different_channels > 1))) | |
504 | return -EINVAL; | |
505 | ||
7527a782 JB |
506 | if (WARN_ON(!c->n_limits)) |
507 | return -EINVAL; | |
508 | ||
509 | for (j = 0; j < c->n_limits; j++) { | |
510 | u16 types = c->limits[j].types; | |
511 | ||
b6a55015 | 512 | /* interface types shouldn't overlap */ |
7527a782 JB |
513 | if (WARN_ON(types & all_iftypes)) |
514 | return -EINVAL; | |
515 | all_iftypes |= types; | |
516 | ||
517 | if (WARN_ON(!c->limits[j].max)) | |
518 | return -EINVAL; | |
519 | ||
520 | /* Shouldn't list software iftypes in combinations! */ | |
521 | if (WARN_ON(wiphy->software_iftypes & types)) | |
522 | return -EINVAL; | |
523 | ||
98104fde JB |
524 | /* Only a single P2P_DEVICE can be allowed */ |
525 | if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) && | |
526 | c->limits[j].max > 1)) | |
527 | return -EINVAL; | |
528 | ||
7527a782 JB |
529 | cnt += c->limits[j].max; |
530 | /* | |
531 | * Don't advertise an unsupported type | |
532 | * in a combination. | |
533 | */ | |
534 | if (WARN_ON((wiphy->interface_modes & types) != types)) | |
535 | return -EINVAL; | |
536 | } | |
537 | ||
538 | /* You can't even choose that many! */ | |
539 | if (WARN_ON(cnt < c->max_interfaces)) | |
540 | return -EINVAL; | |
541 | } | |
542 | ||
543 | return 0; | |
544 | } | |
545 | ||
704232c2 JB |
546 | int wiphy_register(struct wiphy *wiphy) |
547 | { | |
f26cbf40 | 548 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
704232c2 | 549 | int res; |
8318d78a JB |
550 | enum ieee80211_band band; |
551 | struct ieee80211_supported_band *sband; | |
552 | bool have_band = false; | |
553 | int i; | |
f59ac048 LR |
554 | u16 ifmodes = wiphy->interface_modes; |
555 | ||
dfb89c56 | 556 | #ifdef CONFIG_PM |
964dc9e2 JB |
557 | if (WARN_ON(wiphy->wowlan && |
558 | (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) && | |
559 | !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY))) | |
560 | return -EINVAL; | |
561 | if (WARN_ON(wiphy->wowlan && | |
562 | !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns && | |
563 | !wiphy->wowlan->tcp)) | |
77dbbb13 | 564 | return -EINVAL; |
dfb89c56 | 565 | #endif |
1057d35e AN |
566 | if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && |
567 | (!rdev->ops->tdls_channel_switch || | |
568 | !rdev->ops->tdls_cancel_channel_switch))) | |
569 | return -EINVAL; | |
77dbbb13 | 570 | |
ad932f04 AN |
571 | /* |
572 | * if a wiphy has unsupported modes for regulatory channel enforcement, | |
573 | * opt-out of enforcement checking | |
574 | */ | |
575 | if (wiphy->interface_modes & ~(BIT(NL80211_IFTYPE_STATION) | | |
576 | BIT(NL80211_IFTYPE_P2P_CLIENT) | | |
577 | BIT(NL80211_IFTYPE_AP) | | |
578 | BIT(NL80211_IFTYPE_P2P_GO) | | |
579 | BIT(NL80211_IFTYPE_ADHOC) | | |
580 | BIT(NL80211_IFTYPE_P2P_DEVICE) | | |
581 | BIT(NL80211_IFTYPE_AP_VLAN) | | |
582 | BIT(NL80211_IFTYPE_MONITOR))) | |
583 | wiphy->regulatory_flags |= REGULATORY_IGNORE_STALE_KICKOFF; | |
584 | ||
b0d7aa59 JD |
585 | if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) && |
586 | (wiphy->regulatory_flags & | |
587 | (REGULATORY_CUSTOM_REG | | |
588 | REGULATORY_STRICT_REG | | |
589 | REGULATORY_COUNTRY_IE_FOLLOW_POWER | | |
590 | REGULATORY_COUNTRY_IE_IGNORE)))) | |
591 | return -EINVAL; | |
592 | ||
be29b99a AK |
593 | if (WARN_ON(wiphy->coalesce && |
594 | (!wiphy->coalesce->n_rules || | |
595 | !wiphy->coalesce->n_patterns) && | |
596 | (!wiphy->coalesce->pattern_min_len || | |
597 | wiphy->coalesce->pattern_min_len > | |
598 | wiphy->coalesce->pattern_max_len))) | |
599 | return -EINVAL; | |
600 | ||
562a7480 JB |
601 | if (WARN_ON(wiphy->ap_sme_capa && |
602 | !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME))) | |
603 | return -EINVAL; | |
604 | ||
ef15aac6 JB |
605 | if (WARN_ON(wiphy->addresses && !wiphy->n_addresses)) |
606 | return -EINVAL; | |
607 | ||
608 | if (WARN_ON(wiphy->addresses && | |
609 | !is_zero_ether_addr(wiphy->perm_addr) && | |
610 | memcmp(wiphy->perm_addr, wiphy->addresses[0].addr, | |
611 | ETH_ALEN))) | |
612 | return -EINVAL; | |
613 | ||
77765eaf VT |
614 | if (WARN_ON(wiphy->max_acl_mac_addrs && |
615 | (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) || | |
616 | !rdev->ops->set_mac_acl))) | |
617 | return -EINVAL; | |
618 | ||
ef15aac6 JB |
619 | if (wiphy->addresses) |
620 | memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN); | |
621 | ||
f59ac048 LR |
622 | /* sanity check ifmodes */ |
623 | WARN_ON(!ifmodes); | |
2e161f78 | 624 | ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1; |
f59ac048 LR |
625 | if (WARN_ON(ifmodes != wiphy->interface_modes)) |
626 | wiphy->interface_modes = ifmodes; | |
8318d78a | 627 | |
7527a782 JB |
628 | res = wiphy_verify_combinations(wiphy); |
629 | if (res) | |
630 | return res; | |
631 | ||
8318d78a JB |
632 | /* sanity check supported bands/channels */ |
633 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
634 | sband = wiphy->bands[band]; | |
635 | if (!sband) | |
636 | continue; | |
637 | ||
638 | sband->band = band; | |
3a0c52a6 VK |
639 | if (WARN_ON(!sband->n_channels)) |
640 | return -EINVAL; | |
641 | /* | |
8047d261 | 642 | * on 60GHz band, there are no legacy rates, so |
3a0c52a6 VK |
643 | * n_bitrates is 0 |
644 | */ | |
645 | if (WARN_ON(band != IEEE80211_BAND_60GHZ && | |
646 | !sband->n_bitrates)) | |
881d948c JB |
647 | return -EINVAL; |
648 | ||
40db6c77 AK |
649 | /* |
650 | * Since cfg80211_disable_40mhz_24ghz is global, we can | |
651 | * modify the sband's ht data even if the driver uses a | |
652 | * global structure for that. | |
653 | */ | |
654 | if (cfg80211_disable_40mhz_24ghz && | |
655 | band == IEEE80211_BAND_2GHZ && | |
656 | sband->ht_cap.ht_supported) { | |
657 | sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; | |
658 | sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40; | |
659 | } | |
660 | ||
881d948c JB |
661 | /* |
662 | * Since we use a u32 for rate bitmaps in | |
663 | * ieee80211_get_response_rate, we cannot | |
664 | * have more than 32 legacy rates. | |
665 | */ | |
666 | if (WARN_ON(sband->n_bitrates > 32)) | |
8318d78a | 667 | return -EINVAL; |
8318d78a JB |
668 | |
669 | for (i = 0; i < sband->n_channels; i++) { | |
670 | sband->channels[i].orig_flags = | |
671 | sband->channels[i].flags; | |
c4a9fafc | 672 | sband->channels[i].orig_mag = INT_MAX; |
8318d78a JB |
673 | sband->channels[i].orig_mpwr = |
674 | sband->channels[i].max_power; | |
675 | sband->channels[i].band = band; | |
676 | } | |
677 | ||
678 | have_band = true; | |
679 | } | |
680 | ||
681 | if (!have_band) { | |
682 | WARN_ON(1); | |
683 | return -EINVAL; | |
684 | } | |
685 | ||
dfb89c56 | 686 | #ifdef CONFIG_PM |
964dc9e2 JB |
687 | if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns && |
688 | (!rdev->wiphy.wowlan->pattern_min_len || | |
689 | rdev->wiphy.wowlan->pattern_min_len > | |
690 | rdev->wiphy.wowlan->pattern_max_len))) | |
691 | return -EINVAL; | |
dfb89c56 | 692 | #endif |
ff1b6e69 | 693 | |
8318d78a JB |
694 | /* check and set up bitrates */ |
695 | ieee80211_set_bitrate_flags(wiphy); | |
696 | ||
00c3a6ed JB |
697 | rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH; |
698 | ||
aa5f66d5 | 699 | rtnl_lock(); |
79c97e97 | 700 | res = device_add(&rdev->wiphy.dev); |
c3d34d5d | 701 | if (res) { |
aa5f66d5 | 702 | rtnl_unlock(); |
c3d34d5d JL |
703 | return res; |
704 | } | |
1f87f7d3 | 705 | |
2f0accc1 | 706 | /* set up regulatory info */ |
57b5ce07 | 707 | wiphy_regulatory_register(wiphy); |
2f0accc1 | 708 | |
5f2aa25e | 709 | list_add_rcu(&rdev->list, &cfg80211_rdev_list); |
f5ea9120 | 710 | cfg80211_rdev_list_generation++; |
704232c2 JB |
711 | |
712 | /* add to debugfs */ | |
79c97e97 JB |
713 | rdev->wiphy.debugfsdir = |
714 | debugfs_create_dir(wiphy_name(&rdev->wiphy), | |
704232c2 | 715 | ieee80211_debugfs_dir); |
79c97e97 JB |
716 | if (IS_ERR(rdev->wiphy.debugfsdir)) |
717 | rdev->wiphy.debugfsdir = NULL; | |
704232c2 | 718 | |
a796dac9 TB |
719 | cfg80211_debugfs_rdev_add(rdev); |
720 | nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY); | |
721 | ||
a2f73b6c | 722 | if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { |
73d54c9e LR |
723 | struct regulatory_request request; |
724 | ||
725 | request.wiphy_idx = get_wiphy_idx(wiphy); | |
726 | request.initiator = NL80211_REGDOM_SET_BY_DRIVER; | |
727 | request.alpha2[0] = '9'; | |
728 | request.alpha2[1] = '9'; | |
729 | ||
730 | nl80211_send_reg_change_event(&request); | |
731 | } | |
732 | ||
ecb44335 SG |
733 | rdev->wiphy.registered = true; |
734 | rtnl_unlock(); | |
aa5f66d5 JB |
735 | |
736 | res = rfkill_register(rdev->rfkill); | |
737 | if (res) { | |
738 | rfkill_destroy(rdev->rfkill); | |
739 | rdev->rfkill = NULL; | |
740 | wiphy_unregister(&rdev->wiphy); | |
741 | return res; | |
742 | } | |
743 | ||
2f0accc1 | 744 | return 0; |
704232c2 JB |
745 | } |
746 | EXPORT_SYMBOL(wiphy_register); | |
747 | ||
1f87f7d3 JB |
748 | void wiphy_rfkill_start_polling(struct wiphy *wiphy) |
749 | { | |
f26cbf40 | 750 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
1f87f7d3 | 751 | |
79c97e97 | 752 | if (!rdev->ops->rfkill_poll) |
1f87f7d3 | 753 | return; |
79c97e97 JB |
754 | rdev->rfkill_ops.poll = cfg80211_rfkill_poll; |
755 | rfkill_resume_polling(rdev->rfkill); | |
1f87f7d3 JB |
756 | } |
757 | EXPORT_SYMBOL(wiphy_rfkill_start_polling); | |
758 | ||
759 | void wiphy_rfkill_stop_polling(struct wiphy *wiphy) | |
760 | { | |
f26cbf40 | 761 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
1f87f7d3 | 762 | |
79c97e97 | 763 | rfkill_pause_polling(rdev->rfkill); |
1f87f7d3 JB |
764 | } |
765 | EXPORT_SYMBOL(wiphy_rfkill_stop_polling); | |
766 | ||
704232c2 JB |
767 | void wiphy_unregister(struct wiphy *wiphy) |
768 | { | |
f26cbf40 | 769 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
704232c2 | 770 | |
ad002395 JB |
771 | wait_event(rdev->dev_wait, ({ |
772 | int __count; | |
5fe231e8 | 773 | rtnl_lock(); |
ad002395 | 774 | __count = rdev->opencount; |
5fe231e8 | 775 | rtnl_unlock(); |
c4f60846 | 776 | __count == 0; })); |
ad002395 | 777 | |
aa5f66d5 JB |
778 | if (rdev->rfkill) |
779 | rfkill_unregister(rdev->rfkill); | |
256c90de | 780 | |
5fe231e8 | 781 | rtnl_lock(); |
3bb20556 | 782 | nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY); |
5fe231e8 JB |
783 | rdev->wiphy.registered = false; |
784 | ||
2fd05115 | 785 | WARN_ON(!list_empty(&rdev->wdev_list)); |
ad002395 JB |
786 | |
787 | /* | |
788 | * First remove the hardware from everywhere, this makes | |
789 | * it impossible to find from userspace. | |
790 | */ | |
7bcfaf2f | 791 | debugfs_remove_recursive(rdev->wiphy.debugfsdir); |
5f2aa25e JB |
792 | list_del_rcu(&rdev->list); |
793 | synchronize_rcu(); | |
f16bfc1c | 794 | |
bfead080 LR |
795 | /* |
796 | * If this device got a regulatory hint tell core its | |
797 | * free to listen now to a new shiny device regulatory hint | |
798 | */ | |
799 | wiphy_regulatory_deregister(wiphy); | |
3f2355cb | 800 | |
f5ea9120 | 801 | cfg80211_rdev_list_generation++; |
79c97e97 | 802 | device_del(&rdev->wiphy.dev); |
704232c2 | 803 | |
5fe231e8 | 804 | rtnl_unlock(); |
6682588a | 805 | |
36e6fea8 | 806 | flush_work(&rdev->scan_done_wk); |
6682588a | 807 | cancel_work_sync(&rdev->conn_work); |
6682588a | 808 | flush_work(&rdev->event_work); |
04f39047 | 809 | cancel_delayed_work_sync(&rdev->dfs_update_channels_wk); |
78f22b6a | 810 | flush_work(&rdev->destroy_work); |
93a1e86c | 811 | flush_work(&rdev->sched_scan_stop_wk); |
33d8783c | 812 | flush_work(&rdev->mlme_unreg_wk); |
6d52563f | 813 | |
6abb9cb9 JB |
814 | #ifdef CONFIG_PM |
815 | if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup) | |
e35e4d28 | 816 | rdev_set_wakeup(rdev, false); |
6abb9cb9 | 817 | #endif |
6d52563f | 818 | cfg80211_rdev_free_wowlan(rdev); |
be29b99a | 819 | cfg80211_rdev_free_coalesce(rdev); |
704232c2 JB |
820 | } |
821 | EXPORT_SYMBOL(wiphy_unregister); | |
822 | ||
79c97e97 | 823 | void cfg80211_dev_free(struct cfg80211_registered_device *rdev) |
704232c2 | 824 | { |
2a519311 | 825 | struct cfg80211_internal_bss *scan, *tmp; |
37c73b5f | 826 | struct cfg80211_beacon_registration *reg, *treg; |
79c97e97 | 827 | rfkill_destroy(rdev->rfkill); |
37c73b5f BG |
828 | list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) { |
829 | list_del(®->list); | |
830 | kfree(reg); | |
831 | } | |
79c97e97 | 832 | list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list) |
5b112d3d | 833 | cfg80211_put_bss(&rdev->wiphy, &scan->pub); |
79c97e97 | 834 | kfree(rdev); |
704232c2 JB |
835 | } |
836 | ||
837 | void wiphy_free(struct wiphy *wiphy) | |
838 | { | |
839 | put_device(&wiphy->dev); | |
840 | } | |
841 | EXPORT_SYMBOL(wiphy_free); | |
842 | ||
1f87f7d3 JB |
843 | void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked) |
844 | { | |
f26cbf40 | 845 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
1f87f7d3 | 846 | |
79c97e97 JB |
847 | if (rfkill_set_hw_state(rdev->rfkill, blocked)) |
848 | schedule_work(&rdev->rfkill_sync); | |
1f87f7d3 JB |
849 | } |
850 | EXPORT_SYMBOL(wiphy_rfkill_set_hw_state); | |
851 | ||
98104fde JB |
852 | void cfg80211_unregister_wdev(struct wireless_dev *wdev) |
853 | { | |
f26cbf40 | 854 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy); |
98104fde JB |
855 | |
856 | ASSERT_RTNL(); | |
857 | ||
858 | if (WARN_ON(wdev->netdev)) | |
859 | return; | |
860 | ||
98104fde JB |
861 | list_del_rcu(&wdev->list); |
862 | rdev->devlist_generation++; | |
863 | ||
864 | switch (wdev->iftype) { | |
865 | case NL80211_IFTYPE_P2P_DEVICE: | |
33d8783c | 866 | cfg80211_mlme_purge_registrations(wdev); |
f9f47529 | 867 | cfg80211_stop_p2p_device(rdev, wdev); |
98104fde JB |
868 | break; |
869 | default: | |
870 | WARN_ON_ONCE(1); | |
871 | break; | |
872 | } | |
98104fde JB |
873 | } |
874 | EXPORT_SYMBOL(cfg80211_unregister_wdev); | |
875 | ||
f1e3d556 | 876 | static const struct device_type wiphy_type = { |
053a93dd MH |
877 | .name = "wlan", |
878 | }; | |
879 | ||
dbbae26a MK |
880 | void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, |
881 | enum nl80211_iftype iftype, int num) | |
882 | { | |
c5a7e582 | 883 | ASSERT_RTNL(); |
dbbae26a MK |
884 | |
885 | rdev->num_running_ifaces += num; | |
886 | if (iftype == NL80211_IFTYPE_MONITOR) | |
887 | rdev->num_running_monitor_ifaces += num; | |
dbbae26a MK |
888 | } |
889 | ||
f04c2203 MK |
890 | void __cfg80211_leave(struct cfg80211_registered_device *rdev, |
891 | struct wireless_dev *wdev) | |
81256969 SG |
892 | { |
893 | struct net_device *dev = wdev->netdev; | |
31a60ed1 | 894 | struct cfg80211_sched_scan_request *sched_scan_req; |
81256969 | 895 | |
24d584d7 | 896 | ASSERT_RTNL(); |
f04c2203 | 897 | ASSERT_WDEV_LOCK(wdev); |
24d584d7 | 898 | |
81256969 SG |
899 | switch (wdev->iftype) { |
900 | case NL80211_IFTYPE_ADHOC: | |
f04c2203 | 901 | __cfg80211_leave_ibss(rdev, dev, true); |
81256969 SG |
902 | break; |
903 | case NL80211_IFTYPE_P2P_CLIENT: | |
904 | case NL80211_IFTYPE_STATION: | |
31a60ed1 JR |
905 | sched_scan_req = rtnl_dereference(rdev->sched_scan_req); |
906 | if (sched_scan_req && dev == sched_scan_req->dev) | |
24d584d7 | 907 | __cfg80211_stop_sched_scan(rdev, false); |
81256969 | 908 | |
81256969 SG |
909 | #ifdef CONFIG_CFG80211_WEXT |
910 | kfree(wdev->wext.ie); | |
911 | wdev->wext.ie = NULL; | |
912 | wdev->wext.ie_len = 0; | |
913 | wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; | |
914 | #endif | |
83739b03 JB |
915 | cfg80211_disconnect(rdev, dev, |
916 | WLAN_REASON_DEAUTH_LEAVING, true); | |
81256969 SG |
917 | break; |
918 | case NL80211_IFTYPE_MESH_POINT: | |
f04c2203 | 919 | __cfg80211_leave_mesh(rdev, dev); |
81256969 SG |
920 | break; |
921 | case NL80211_IFTYPE_AP: | |
74418ede | 922 | case NL80211_IFTYPE_P2P_GO: |
f04c2203 | 923 | __cfg80211_stop_ap(rdev, dev, true); |
81256969 | 924 | break; |
6e0bd6c3 RL |
925 | case NL80211_IFTYPE_OCB: |
926 | __cfg80211_leave_ocb(rdev, dev); | |
927 | break; | |
de4fcbad JB |
928 | case NL80211_IFTYPE_WDS: |
929 | /* must be handled by mac80211/driver, has no APIs */ | |
930 | break; | |
931 | case NL80211_IFTYPE_P2P_DEVICE: | |
932 | /* cannot happen, has no netdev */ | |
933 | break; | |
934 | case NL80211_IFTYPE_AP_VLAN: | |
935 | case NL80211_IFTYPE_MONITOR: | |
936 | /* nothing to do */ | |
937 | break; | |
938 | case NL80211_IFTYPE_UNSPECIFIED: | |
939 | case NUM_NL80211_IFTYPES: | |
940 | /* invalid */ | |
81256969 SG |
941 | break; |
942 | } | |
81256969 SG |
943 | } |
944 | ||
f04c2203 MK |
945 | void cfg80211_leave(struct cfg80211_registered_device *rdev, |
946 | struct wireless_dev *wdev) | |
947 | { | |
948 | wdev_lock(wdev); | |
949 | __cfg80211_leave(rdev, wdev); | |
950 | wdev_unlock(wdev); | |
951 | } | |
952 | ||
953 | void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev, | |
954 | gfp_t gfp) | |
955 | { | |
956 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); | |
957 | struct cfg80211_event *ev; | |
958 | unsigned long flags; | |
959 | ||
960 | trace_cfg80211_stop_iface(wiphy, wdev); | |
961 | ||
962 | ev = kzalloc(sizeof(*ev), gfp); | |
963 | if (!ev) | |
964 | return; | |
965 | ||
966 | ev->type = EVENT_STOPPED; | |
967 | ||
968 | spin_lock_irqsave(&wdev->event_lock, flags); | |
969 | list_add_tail(&ev->list, &wdev->event_list); | |
970 | spin_unlock_irqrestore(&wdev->event_lock, flags); | |
971 | queue_work(cfg80211_wq, &rdev->event_work); | |
972 | } | |
973 | EXPORT_SYMBOL(cfg80211_stop_iface); | |
974 | ||
c4f60846 | 975 | static int cfg80211_netdev_notifier_call(struct notifier_block *nb, |
351638e7 | 976 | unsigned long state, void *ptr) |
704232c2 | 977 | { |
351638e7 | 978 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
2a783c13 | 979 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
704232c2 | 980 | struct cfg80211_registered_device *rdev; |
31a60ed1 | 981 | struct cfg80211_sched_scan_request *sched_scan_req; |
704232c2 | 982 | |
2a783c13 | 983 | if (!wdev) |
1f87f7d3 | 984 | return NOTIFY_DONE; |
704232c2 | 985 | |
f26cbf40 | 986 | rdev = wiphy_to_rdev(wdev->wiphy); |
704232c2 | 987 | |
2a783c13 | 988 | WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); |
60719ffd | 989 | |
704232c2 | 990 | switch (state) { |
053a93dd MH |
991 | case NETDEV_POST_INIT: |
992 | SET_NETDEV_DEVTYPE(dev, &wiphy_type); | |
993 | break; | |
704232c2 | 994 | case NETDEV_REGISTER: |
0ff6ce7b JB |
995 | /* |
996 | * NB: cannot take rdev->mtx here because this may be | |
997 | * called within code protected by it when interfaces | |
998 | * are added with nl80211. | |
999 | */ | |
667503dd JB |
1000 | mutex_init(&wdev->mtx); |
1001 | INIT_LIST_HEAD(&wdev->event_list); | |
1002 | spin_lock_init(&wdev->event_lock); | |
2e161f78 JB |
1003 | INIT_LIST_HEAD(&wdev->mgmt_registrations); |
1004 | spin_lock_init(&wdev->mgmt_registrations_lock); | |
026331c4 | 1005 | |
89a54e48 JB |
1006 | wdev->identifier = ++rdev->wdev_id; |
1007 | list_add_rcu(&wdev->list, &rdev->wdev_list); | |
f5ea9120 | 1008 | rdev->devlist_generation++; |
463d0183 JB |
1009 | /* can only change netns with wiphy */ |
1010 | dev->features |= NETIF_F_NETNS_LOCAL; | |
1011 | ||
704232c2 JB |
1012 | if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj, |
1013 | "phy80211")) { | |
e9c0268f | 1014 | pr_err("failed to add phy80211 symlink to netdev!\n"); |
704232c2 | 1015 | } |
2a783c13 | 1016 | wdev->netdev = dev; |
3d23e349 | 1017 | #ifdef CONFIG_CFG80211_WEXT |
2a783c13 JB |
1018 | wdev->wext.default_key = -1; |
1019 | wdev->wext.default_mgmt_key = -1; | |
f2129354 | 1020 | wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; |
ffb9eb3d KV |
1021 | #endif |
1022 | ||
5be83de5 | 1023 | if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT) |
ffb9eb3d | 1024 | wdev->ps = true; |
5be83de5 | 1025 | else |
ffb9eb3d | 1026 | wdev->ps = false; |
9043f3b8 JO |
1027 | /* allow mac80211 to determine the timeout */ |
1028 | wdev->ps_timeout = -1; | |
ffb9eb3d | 1029 | |
ad4bb6f8 | 1030 | if ((wdev->iftype == NL80211_IFTYPE_STATION || |
074ac8df | 1031 | wdev->iftype == NL80211_IFTYPE_P2P_CLIENT || |
ad4bb6f8 JB |
1032 | wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr) |
1033 | dev->priv_flags |= IFF_DONT_BRIDGE; | |
704232c2 | 1034 | break; |
04a773ad | 1035 | case NETDEV_GOING_DOWN: |
81256969 | 1036 | cfg80211_leave(rdev, wdev); |
01a0ac41 JB |
1037 | break; |
1038 | case NETDEV_DOWN: | |
dbbae26a | 1039 | cfg80211_update_iface_num(rdev, wdev->iftype, -1); |
a617302c JB |
1040 | if (rdev->scan_req && rdev->scan_req->wdev == wdev) { |
1041 | if (WARN_ON(!rdev->scan_req->notified)) | |
1042 | rdev->scan_req->aborted = true; | |
f9d15d16 | 1043 | ___cfg80211_scan_done(rdev, false); |
a617302c | 1044 | } |
5fe231e8 | 1045 | |
31a60ed1 JR |
1046 | sched_scan_req = rtnl_dereference(rdev->sched_scan_req); |
1047 | if (WARN_ON(sched_scan_req && | |
1048 | sched_scan_req->dev == wdev->netdev)) { | |
5fe231e8 JB |
1049 | __cfg80211_stop_sched_scan(rdev, false); |
1050 | } | |
1051 | ||
1052 | rdev->opencount--; | |
1053 | wake_up(&rdev->dev_wait); | |
04a773ad JB |
1054 | break; |
1055 | case NETDEV_UP: | |
4290cb4b | 1056 | cfg80211_update_iface_num(rdev, wdev->iftype, 1); |
667503dd | 1057 | wdev_lock(wdev); |
f2129354 | 1058 | switch (wdev->iftype) { |
29cbe68c | 1059 | #ifdef CONFIG_CFG80211_WEXT |
f2129354 | 1060 | case NL80211_IFTYPE_ADHOC: |
fffd0934 | 1061 | cfg80211_ibss_wext_join(rdev, wdev); |
04a773ad | 1062 | break; |
f2129354 | 1063 | case NL80211_IFTYPE_STATION: |
fffd0934 | 1064 | cfg80211_mgd_wext_connect(rdev, wdev); |
f2129354 | 1065 | break; |
29cbe68c | 1066 | #endif |
c80d545d | 1067 | #ifdef CONFIG_MAC80211_MESH |
29cbe68c | 1068 | case NL80211_IFTYPE_MESH_POINT: |
c80d545d JC |
1069 | { |
1070 | /* backward compat code... */ | |
1071 | struct mesh_setup setup; | |
1072 | memcpy(&setup, &default_mesh_setup, | |
1073 | sizeof(setup)); | |
1074 | /* back compat only needed for mesh_id */ | |
1075 | setup.mesh_id = wdev->ssid; | |
1076 | setup.mesh_id_len = wdev->mesh_id_up_len; | |
1077 | if (wdev->mesh_id_up_len) | |
1078 | __cfg80211_join_mesh(rdev, dev, | |
1079 | &setup, | |
1080 | &default_mesh_config); | |
1081 | break; | |
1082 | } | |
1083 | #endif | |
f2129354 | 1084 | default: |
04a773ad | 1085 | break; |
f2129354 | 1086 | } |
667503dd | 1087 | wdev_unlock(wdev); |
ad002395 | 1088 | rdev->opencount++; |
bf6a0579 JO |
1089 | |
1090 | /* | |
1091 | * Configure power management to the driver here so that its | |
1092 | * correctly set also after interface type changes etc. | |
1093 | */ | |
5966f2dd EP |
1094 | if ((wdev->iftype == NL80211_IFTYPE_STATION || |
1095 | wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) && | |
bf6a0579 | 1096 | rdev->ops->set_power_mgmt) |
e35e4d28 HG |
1097 | if (rdev_set_power_mgmt(rdev, dev, wdev->ps, |
1098 | wdev->ps_timeout)) { | |
bf6a0579 JO |
1099 | /* assume this means it's off */ |
1100 | wdev->ps = false; | |
1101 | } | |
2a783c13 | 1102 | break; |
704232c2 | 1103 | case NETDEV_UNREGISTER: |
e40cbdac JB |
1104 | /* |
1105 | * It is possible to get NETDEV_UNREGISTER | |
1106 | * multiple times. To detect that, check | |
1107 | * that the interface is still on the list | |
1108 | * of registered interfaces, and only then | |
1109 | * remove and clean it up. | |
1110 | */ | |
2a783c13 | 1111 | if (!list_empty(&wdev->list)) { |
704232c2 | 1112 | sysfs_remove_link(&dev->dev.kobj, "phy80211"); |
5f2aa25e | 1113 | list_del_rcu(&wdev->list); |
f5ea9120 | 1114 | rdev->devlist_generation++; |
2e161f78 | 1115 | cfg80211_mlme_purge_registrations(wdev); |
3d23e349 | 1116 | #ifdef CONFIG_CFG80211_WEXT |
538c9eb8 | 1117 | kzfree(wdev->wext.keys); |
fffd0934 | 1118 | #endif |
e40cbdac | 1119 | } |
5f2aa25e JB |
1120 | /* |
1121 | * synchronise (so that we won't find this netdev | |
1122 | * from other code any more) and then clear the list | |
1123 | * head so that the above code can safely check for | |
1124 | * !list_empty() to avoid double-cleanup. | |
1125 | */ | |
1126 | synchronize_rcu(); | |
1127 | INIT_LIST_HEAD(&wdev->list); | |
1f6fc43e DD |
1128 | /* |
1129 | * Ensure that all events have been processed and | |
1130 | * freed. | |
1131 | */ | |
1132 | cfg80211_process_wdev_events(wdev); | |
f9bef3df BG |
1133 | |
1134 | if (WARN_ON(wdev->current_bss)) { | |
1135 | cfg80211_unhold_bss(wdev->current_bss); | |
1136 | cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub); | |
1137 | wdev->current_bss = NULL; | |
1138 | } | |
704232c2 | 1139 | break; |
1f87f7d3 | 1140 | case NETDEV_PRE_UP: |
0b20633d JB |
1141 | if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype))) |
1142 | return notifier_from_errno(-EOPNOTSUPP); | |
b6a55015 LC |
1143 | if (rfkill_blocked(rdev->rfkill)) |
1144 | return notifier_from_errno(-ERFKILL); | |
1f87f7d3 | 1145 | break; |
6784c7db ZG |
1146 | default: |
1147 | return NOTIFY_DONE; | |
704232c2 JB |
1148 | } |
1149 | ||
6784c7db | 1150 | return NOTIFY_OK; |
704232c2 JB |
1151 | } |
1152 | ||
1153 | static struct notifier_block cfg80211_netdev_notifier = { | |
1154 | .notifier_call = cfg80211_netdev_notifier_call, | |
1155 | }; | |
1156 | ||
463d0183 JB |
1157 | static void __net_exit cfg80211_pernet_exit(struct net *net) |
1158 | { | |
1159 | struct cfg80211_registered_device *rdev; | |
1160 | ||
1161 | rtnl_lock(); | |
463d0183 JB |
1162 | list_for_each_entry(rdev, &cfg80211_rdev_list, list) { |
1163 | if (net_eq(wiphy_net(&rdev->wiphy), net)) | |
1164 | WARN_ON(cfg80211_switch_netns(rdev, &init_net)); | |
1165 | } | |
463d0183 JB |
1166 | rtnl_unlock(); |
1167 | } | |
1168 | ||
1169 | static struct pernet_operations cfg80211_pernet_ops = { | |
1170 | .exit = cfg80211_pernet_exit, | |
1171 | }; | |
1172 | ||
1173 | static int __init cfg80211_init(void) | |
704232c2 | 1174 | { |
b2e1b302 LR |
1175 | int err; |
1176 | ||
463d0183 JB |
1177 | err = register_pernet_device(&cfg80211_pernet_ops); |
1178 | if (err) | |
1179 | goto out_fail_pernet; | |
1180 | ||
b2e1b302 | 1181 | err = wiphy_sysfs_init(); |
704232c2 JB |
1182 | if (err) |
1183 | goto out_fail_sysfs; | |
1184 | ||
1185 | err = register_netdevice_notifier(&cfg80211_netdev_notifier); | |
1186 | if (err) | |
1187 | goto out_fail_notifier; | |
1188 | ||
55682965 JB |
1189 | err = nl80211_init(); |
1190 | if (err) | |
1191 | goto out_fail_nl80211; | |
1192 | ||
704232c2 JB |
1193 | ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL); |
1194 | ||
b2e1b302 LR |
1195 | err = regulatory_init(); |
1196 | if (err) | |
1197 | goto out_fail_reg; | |
1198 | ||
e60d7443 | 1199 | cfg80211_wq = create_singlethread_workqueue("cfg80211"); |
f00f188f WY |
1200 | if (!cfg80211_wq) { |
1201 | err = -ENOMEM; | |
e60d7443 | 1202 | goto out_fail_wq; |
f00f188f | 1203 | } |
e60d7443 | 1204 | |
704232c2 JB |
1205 | return 0; |
1206 | ||
e60d7443 AB |
1207 | out_fail_wq: |
1208 | regulatory_exit(); | |
b2e1b302 LR |
1209 | out_fail_reg: |
1210 | debugfs_remove(ieee80211_debugfs_dir); | |
81daf735 | 1211 | nl80211_exit(); |
55682965 JB |
1212 | out_fail_nl80211: |
1213 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); | |
704232c2 JB |
1214 | out_fail_notifier: |
1215 | wiphy_sysfs_exit(); | |
1216 | out_fail_sysfs: | |
463d0183 JB |
1217 | unregister_pernet_device(&cfg80211_pernet_ops); |
1218 | out_fail_pernet: | |
704232c2 JB |
1219 | return err; |
1220 | } | |
3a462465 | 1221 | subsys_initcall(cfg80211_init); |
704232c2 | 1222 | |
f884e387 | 1223 | static void __exit cfg80211_exit(void) |
704232c2 JB |
1224 | { |
1225 | debugfs_remove(ieee80211_debugfs_dir); | |
55682965 | 1226 | nl80211_exit(); |
704232c2 JB |
1227 | unregister_netdevice_notifier(&cfg80211_netdev_notifier); |
1228 | wiphy_sysfs_exit(); | |
b2e1b302 | 1229 | regulatory_exit(); |
463d0183 | 1230 | unregister_pernet_device(&cfg80211_pernet_ops); |
e60d7443 | 1231 | destroy_workqueue(cfg80211_wq); |
704232c2 JB |
1232 | } |
1233 | module_exit(cfg80211_exit); |