1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * This is the linux wireless configuration interface. |
4 | * |
5 | * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net> |
6 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
7 | * Copyright 2015-2017 Intel Deutschland GmbH |
8 | * Copyright (C) 2018-2024 Intel Corporation |
9 | */ |
10 | |
11 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
12 | |
13 | #include <linux/if.h> |
14 | #include <linux/module.h> |
15 | #include <linux/err.h> |
16 | #include <linux/list.h> |
17 | #include <linux/slab.h> |
18 | #include <linux/nl80211.h> |
19 | #include <linux/debugfs.h> |
20 | #include <linux/notifier.h> |
21 | #include <linux/device.h> |
22 | #include <linux/etherdevice.h> |
23 | #include <linux/rtnetlink.h> |
24 | #include <linux/sched.h> |
25 | #include <net/genetlink.h> |
26 | #include <net/cfg80211.h> |
27 | #include "nl80211.h" |
28 | #include "core.h" |
29 | #include "sysfs.h" |
30 | #include "debugfs.h" |
31 | #include "wext-compat.h" |
32 | #include "rdev-ops.h" |
33 | |
34 | /* name for sysfs, %d is appended */ |
35 | #define PHY_NAME "phy" |
36 | |
37 | MODULE_AUTHOR("Johannes Berg" ); |
38 | MODULE_LICENSE("GPL" ); |
39 | MODULE_DESCRIPTION("wireless configuration support" ); |
40 | MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME); |
41 | |
42 | /* RCU-protected (and RTNL for writers) */ |
43 | LIST_HEAD(cfg80211_rdev_list); |
44 | int cfg80211_rdev_list_generation; |
45 | |
46 | /* for debugfs */ |
47 | static struct dentry *ieee80211_debugfs_dir; |
48 | |
49 | /* for the cleanup, scan and event works */ |
50 | struct workqueue_struct *cfg80211_wq; |
51 | |
52 | static bool cfg80211_disable_40mhz_24ghz; |
53 | module_param(cfg80211_disable_40mhz_24ghz, bool, 0644); |
54 | MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz, |
55 | "Disable 40MHz support in the 2.4GHz band" ); |
56 | |
57 | struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx) |
58 | { |
59 | struct cfg80211_registered_device *result = NULL, *rdev; |
60 | |
61 | ASSERT_RTNL(); |
62 | |
63 | for_each_rdev(rdev) { |
64 | if (rdev->wiphy_idx == wiphy_idx) { |
65 | result = rdev; |
66 | break; |
67 | } |
68 | } |
69 | |
70 | return result; |
71 | } |
72 | |
73 | int get_wiphy_idx(struct wiphy *wiphy) |
74 | { |
75 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
76 | |
77 | return rdev->wiphy_idx; |
78 | } |
79 | |
80 | struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx) |
81 | { |
82 | struct cfg80211_registered_device *rdev; |
83 | |
84 | ASSERT_RTNL(); |
85 | |
86 | rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx); |
87 | if (!rdev) |
88 | return NULL; |
89 | return &rdev->wiphy; |
90 | } |
91 | |
92 | static int cfg80211_dev_check_name(struct cfg80211_registered_device *rdev, |
93 | const char *newname) |
94 | { |
95 | struct cfg80211_registered_device *rdev2; |
96 | int wiphy_idx, taken = -1, digits; |
97 | |
98 | ASSERT_RTNL(); |
99 | |
100 | if (strlen(newname) > NL80211_WIPHY_NAME_MAXLEN) |
101 | return -EINVAL; |
102 | |
103 | /* prohibit calling the thing phy%d when %d is not its number */ |
104 | sscanf(newname, PHY_NAME "%d%n" , &wiphy_idx, &taken); |
105 | if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) { |
106 | /* count number of places needed to print wiphy_idx */ |
107 | digits = 1; |
108 | while (wiphy_idx /= 10) |
109 | digits++; |
110 | /* |
111 | * deny the name if it is phy<idx> where <idx> is printed |
112 | * without leading zeroes. taken == strlen(newname) here |
113 | */ |
114 | if (taken == strlen(PHY_NAME) + digits) |
115 | return -EINVAL; |
116 | } |
117 | |
118 | /* Ensure another device does not already have this name. */ |
119 | for_each_rdev(rdev2) |
120 | if (strcmp(newname, wiphy_name(wiphy: &rdev2->wiphy)) == 0) |
121 | return -EINVAL; |
122 | |
123 | return 0; |
124 | } |
125 | |
126 | int cfg80211_dev_rename(struct cfg80211_registered_device *rdev, |
127 | char *newname) |
128 | { |
129 | int result; |
130 | |
131 | ASSERT_RTNL(); |
132 | lockdep_assert_wiphy(&rdev->wiphy); |
133 | |
134 | /* Ignore nop renames */ |
135 | if (strcmp(newname, wiphy_name(wiphy: &rdev->wiphy)) == 0) |
136 | return 0; |
137 | |
138 | result = cfg80211_dev_check_name(rdev, newname); |
139 | if (result < 0) |
140 | return result; |
141 | |
142 | result = device_rename(dev: &rdev->wiphy.dev, new_name: newname); |
143 | if (result) |
144 | return result; |
145 | |
146 | if (!IS_ERR_OR_NULL(ptr: rdev->wiphy.debugfsdir)) |
147 | debugfs_rename(old_dir: rdev->wiphy.debugfsdir->d_parent, |
148 | old_dentry: rdev->wiphy.debugfsdir, |
149 | new_dir: rdev->wiphy.debugfsdir->d_parent, new_name: newname); |
150 | |
151 | nl80211_notify_wiphy(rdev, cmd: NL80211_CMD_NEW_WIPHY); |
152 | |
153 | return 0; |
154 | } |
155 | |
156 | int cfg80211_switch_netns(struct cfg80211_registered_device *rdev, |
157 | struct net *net) |
158 | { |
159 | struct wireless_dev *wdev; |
160 | int err = 0; |
161 | |
162 | if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK)) |
163 | return -EOPNOTSUPP; |
164 | |
165 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { |
166 | if (!wdev->netdev) |
167 | continue; |
168 | wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; |
169 | err = dev_change_net_namespace(dev: wdev->netdev, net, pat: "wlan%d" ); |
170 | if (err) |
171 | break; |
172 | wdev->netdev->features |= NETIF_F_NETNS_LOCAL; |
173 | } |
174 | |
175 | if (err) { |
176 | /* failed -- clean up to old netns */ |
177 | net = wiphy_net(wiphy: &rdev->wiphy); |
178 | |
179 | list_for_each_entry_continue_reverse(wdev, |
180 | &rdev->wiphy.wdev_list, |
181 | list) { |
182 | if (!wdev->netdev) |
183 | continue; |
184 | wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL; |
185 | err = dev_change_net_namespace(dev: wdev->netdev, net, |
186 | pat: "wlan%d" ); |
187 | WARN_ON(err); |
188 | wdev->netdev->features |= NETIF_F_NETNS_LOCAL; |
189 | } |
190 | |
191 | return err; |
192 | } |
193 | |
194 | wiphy_lock(wiphy: &rdev->wiphy); |
195 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { |
196 | if (!wdev->netdev) |
197 | continue; |
198 | nl80211_notify_iface(rdev, wdev, cmd: NL80211_CMD_DEL_INTERFACE); |
199 | } |
200 | |
201 | nl80211_notify_wiphy(rdev, cmd: NL80211_CMD_DEL_WIPHY); |
202 | |
203 | wiphy_net_set(wiphy: &rdev->wiphy, net); |
204 | |
205 | err = device_rename(dev: &rdev->wiphy.dev, new_name: dev_name(dev: &rdev->wiphy.dev)); |
206 | WARN_ON(err); |
207 | |
208 | nl80211_notify_wiphy(rdev, cmd: NL80211_CMD_NEW_WIPHY); |
209 | |
210 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { |
211 | if (!wdev->netdev) |
212 | continue; |
213 | nl80211_notify_iface(rdev, wdev, cmd: NL80211_CMD_NEW_INTERFACE); |
214 | } |
215 | wiphy_unlock(wiphy: &rdev->wiphy); |
216 | |
217 | return 0; |
218 | } |
219 | |
220 | static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data) |
221 | { |
222 | struct cfg80211_registered_device *rdev = data; |
223 | |
224 | wiphy_lock(wiphy: &rdev->wiphy); |
225 | rdev_rfkill_poll(rdev); |
226 | wiphy_unlock(wiphy: &rdev->wiphy); |
227 | } |
228 | |
229 | void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev, |
230 | struct wireless_dev *wdev) |
231 | { |
232 | lockdep_assert_held(&rdev->wiphy.mtx); |
233 | |
234 | if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE)) |
235 | return; |
236 | |
237 | if (!wdev_running(wdev)) |
238 | return; |
239 | |
240 | rdev_stop_p2p_device(rdev, wdev); |
241 | wdev->is_running = false; |
242 | |
243 | rdev->opencount--; |
244 | |
245 | if (rdev->scan_req && rdev->scan_req->wdev == wdev) { |
246 | if (WARN_ON(!rdev->scan_req->notified && |
247 | (!rdev->int_scan_req || |
248 | !rdev->int_scan_req->notified))) |
249 | rdev->scan_req->info.aborted = true; |
250 | ___cfg80211_scan_done(rdev, send_message: false); |
251 | } |
252 | } |
253 | |
254 | void cfg80211_stop_nan(struct cfg80211_registered_device *rdev, |
255 | struct wireless_dev *wdev) |
256 | { |
257 | lockdep_assert_held(&rdev->wiphy.mtx); |
258 | |
259 | if (WARN_ON(wdev->iftype != NL80211_IFTYPE_NAN)) |
260 | return; |
261 | |
262 | if (!wdev_running(wdev)) |
263 | return; |
264 | |
265 | rdev_stop_nan(rdev, wdev); |
266 | wdev->is_running = false; |
267 | |
268 | rdev->opencount--; |
269 | } |
270 | |
271 | void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy) |
272 | { |
273 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
274 | struct wireless_dev *wdev; |
275 | |
276 | ASSERT_RTNL(); |
277 | |
278 | list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) { |
279 | if (wdev->netdev) { |
280 | dev_close(dev: wdev->netdev); |
281 | continue; |
282 | } |
283 | |
284 | /* otherwise, check iftype */ |
285 | |
286 | wiphy_lock(wiphy); |
287 | |
288 | switch (wdev->iftype) { |
289 | case NL80211_IFTYPE_P2P_DEVICE: |
290 | cfg80211_stop_p2p_device(rdev, wdev); |
291 | break; |
292 | case NL80211_IFTYPE_NAN: |
293 | cfg80211_stop_nan(rdev, wdev); |
294 | break; |
295 | default: |
296 | break; |
297 | } |
298 | |
299 | wiphy_unlock(wiphy); |
300 | } |
301 | } |
302 | EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces); |
303 | |
304 | static int cfg80211_rfkill_set_block(void *data, bool blocked) |
305 | { |
306 | struct cfg80211_registered_device *rdev = data; |
307 | |
308 | if (!blocked) |
309 | return 0; |
310 | |
311 | rtnl_lock(); |
312 | cfg80211_shutdown_all_interfaces(&rdev->wiphy); |
313 | rtnl_unlock(); |
314 | |
315 | return 0; |
316 | } |
317 | |
318 | static void cfg80211_rfkill_block_work(struct work_struct *work) |
319 | { |
320 | struct cfg80211_registered_device *rdev; |
321 | |
322 | rdev = container_of(work, struct cfg80211_registered_device, |
323 | rfkill_block); |
324 | cfg80211_rfkill_set_block(data: rdev, blocked: true); |
325 | } |
326 | |
327 | static void cfg80211_event_work(struct work_struct *work) |
328 | { |
329 | struct cfg80211_registered_device *rdev; |
330 | |
331 | rdev = container_of(work, struct cfg80211_registered_device, |
332 | event_work); |
333 | |
334 | wiphy_lock(wiphy: &rdev->wiphy); |
335 | cfg80211_process_rdev_events(rdev); |
336 | wiphy_unlock(wiphy: &rdev->wiphy); |
337 | } |
338 | |
339 | void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev) |
340 | { |
341 | struct wireless_dev *wdev, *tmp; |
342 | |
343 | ASSERT_RTNL(); |
344 | |
345 | list_for_each_entry_safe(wdev, tmp, &rdev->wiphy.wdev_list, list) { |
346 | if (wdev->nl_owner_dead) { |
347 | if (wdev->netdev) |
348 | dev_close(dev: wdev->netdev); |
349 | |
350 | wiphy_lock(wiphy: &rdev->wiphy); |
351 | cfg80211_leave(rdev, wdev); |
352 | cfg80211_remove_virtual_intf(rdev, wdev); |
353 | wiphy_unlock(wiphy: &rdev->wiphy); |
354 | } |
355 | } |
356 | } |
357 | |
358 | static void cfg80211_destroy_iface_wk(struct work_struct *work) |
359 | { |
360 | struct cfg80211_registered_device *rdev; |
361 | |
362 | rdev = container_of(work, struct cfg80211_registered_device, |
363 | destroy_work); |
364 | |
365 | rtnl_lock(); |
366 | cfg80211_destroy_ifaces(rdev); |
367 | rtnl_unlock(); |
368 | } |
369 | |
370 | static void cfg80211_sched_scan_stop_wk(struct wiphy *wiphy, |
371 | struct wiphy_work *work) |
372 | { |
373 | struct cfg80211_registered_device *rdev; |
374 | struct cfg80211_sched_scan_request *req, *tmp; |
375 | |
376 | rdev = container_of(work, struct cfg80211_registered_device, |
377 | sched_scan_stop_wk); |
378 | |
379 | list_for_each_entry_safe(req, tmp, &rdev->sched_scan_req_list, list) { |
380 | if (req->nl_owner_dead) |
381 | cfg80211_stop_sched_scan_req(rdev, req, driver_initiated: false); |
382 | } |
383 | } |
384 | |
385 | static void cfg80211_propagate_radar_detect_wk(struct work_struct *work) |
386 | { |
387 | struct cfg80211_registered_device *rdev; |
388 | |
389 | rdev = container_of(work, struct cfg80211_registered_device, |
390 | propagate_radar_detect_wk); |
391 | |
392 | rtnl_lock(); |
393 | |
394 | regulatory_propagate_dfs_state(wiphy: &rdev->wiphy, chandef: &rdev->radar_chandef, |
395 | dfs_state: NL80211_DFS_UNAVAILABLE, |
396 | event: NL80211_RADAR_DETECTED); |
397 | |
398 | rtnl_unlock(); |
399 | } |
400 | |
401 | static void cfg80211_propagate_cac_done_wk(struct work_struct *work) |
402 | { |
403 | struct cfg80211_registered_device *rdev; |
404 | |
405 | rdev = container_of(work, struct cfg80211_registered_device, |
406 | propagate_cac_done_wk); |
407 | |
408 | rtnl_lock(); |
409 | |
410 | regulatory_propagate_dfs_state(wiphy: &rdev->wiphy, chandef: &rdev->cac_done_chandef, |
411 | dfs_state: NL80211_DFS_AVAILABLE, |
412 | event: NL80211_RADAR_CAC_FINISHED); |
413 | |
414 | rtnl_unlock(); |
415 | } |
416 | |
417 | static void cfg80211_wiphy_work(struct work_struct *work) |
418 | { |
419 | struct cfg80211_registered_device *rdev; |
420 | struct wiphy_work *wk; |
421 | |
422 | rdev = container_of(work, struct cfg80211_registered_device, wiphy_work); |
423 | |
424 | wiphy_lock(wiphy: &rdev->wiphy); |
425 | if (rdev->suspended) |
426 | goto out; |
427 | |
428 | spin_lock_irq(lock: &rdev->wiphy_work_lock); |
429 | wk = list_first_entry_or_null(&rdev->wiphy_work_list, |
430 | struct wiphy_work, entry); |
431 | if (wk) { |
432 | list_del_init(entry: &wk->entry); |
433 | if (!list_empty(head: &rdev->wiphy_work_list)) |
434 | schedule_work(work); |
435 | spin_unlock_irq(lock: &rdev->wiphy_work_lock); |
436 | |
437 | wk->func(&rdev->wiphy, wk); |
438 | } else { |
439 | spin_unlock_irq(lock: &rdev->wiphy_work_lock); |
440 | } |
441 | out: |
442 | wiphy_unlock(wiphy: &rdev->wiphy); |
443 | } |
444 | |
445 | /* exported functions */ |
446 | |
447 | struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv, |
448 | const char *requested_name) |
449 | { |
450 | static atomic_t wiphy_counter = ATOMIC_INIT(0); |
451 | |
452 | struct cfg80211_registered_device *rdev; |
453 | int alloc_size; |
454 | |
455 | WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key)); |
456 | WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc)); |
457 | WARN_ON(ops->connect && !ops->disconnect); |
458 | WARN_ON(ops->join_ibss && !ops->leave_ibss); |
459 | WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf); |
460 | WARN_ON(ops->add_station && !ops->del_station); |
461 | WARN_ON(ops->add_mpath && !ops->del_mpath); |
462 | WARN_ON(ops->join_mesh && !ops->leave_mesh); |
463 | WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device); |
464 | WARN_ON(ops->start_ap && !ops->stop_ap); |
465 | WARN_ON(ops->join_ocb && !ops->leave_ocb); |
466 | WARN_ON(ops->suspend && !ops->resume); |
467 | WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop); |
468 | WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel); |
469 | WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch); |
470 | WARN_ON(ops->add_tx_ts && !ops->del_tx_ts); |
471 | |
472 | alloc_size = sizeof(*rdev) + sizeof_priv; |
473 | |
474 | rdev = kzalloc(size: alloc_size, GFP_KERNEL); |
475 | if (!rdev) |
476 | return NULL; |
477 | |
478 | rdev->ops = ops; |
479 | |
480 | rdev->wiphy_idx = atomic_inc_return(v: &wiphy_counter); |
481 | |
482 | if (unlikely(rdev->wiphy_idx < 0)) { |
483 | /* ugh, wrapped! */ |
484 | atomic_dec(v: &wiphy_counter); |
485 | kfree(objp: rdev); |
486 | return NULL; |
487 | } |
488 | |
489 | /* atomic_inc_return makes it start at 1, make it start at 0 */ |
490 | rdev->wiphy_idx--; |
491 | |
492 | /* give it a proper name */ |
493 | if (requested_name && requested_name[0]) { |
494 | int rv; |
495 | |
496 | rtnl_lock(); |
497 | rv = cfg80211_dev_check_name(rdev, newname: requested_name); |
498 | |
499 | if (rv < 0) { |
500 | rtnl_unlock(); |
501 | goto use_default_name; |
502 | } |
503 | |
504 | rv = dev_set_name(dev: &rdev->wiphy.dev, name: "%s" , requested_name); |
505 | rtnl_unlock(); |
506 | if (rv) |
507 | goto use_default_name; |
508 | } else { |
509 | int rv; |
510 | |
511 | use_default_name: |
512 | /* NOTE: This is *probably* safe w/out holding rtnl because of |
513 | * the restrictions on phy names. Probably this call could |
514 | * fail if some other part of the kernel (re)named a device |
515 | * phyX. But, might should add some locking and check return |
516 | * value, and use a different name if this one exists? |
517 | */ |
518 | rv = dev_set_name(dev: &rdev->wiphy.dev, PHY_NAME "%d" , rdev->wiphy_idx); |
519 | if (rv < 0) { |
520 | kfree(objp: rdev); |
521 | return NULL; |
522 | } |
523 | } |
524 | |
525 | mutex_init(&rdev->wiphy.mtx); |
526 | INIT_LIST_HEAD(list: &rdev->wiphy.wdev_list); |
527 | INIT_LIST_HEAD(list: &rdev->beacon_registrations); |
528 | spin_lock_init(&rdev->beacon_registrations_lock); |
529 | spin_lock_init(&rdev->bss_lock); |
530 | INIT_LIST_HEAD(list: &rdev->bss_list); |
531 | INIT_LIST_HEAD(list: &rdev->sched_scan_req_list); |
532 | wiphy_work_init(work: &rdev->scan_done_wk, func: __cfg80211_scan_done); |
533 | INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk, |
534 | cfg80211_dfs_channels_update_work); |
535 | #ifdef CONFIG_CFG80211_WEXT |
536 | rdev->wiphy.wext = &cfg80211_wext_handler; |
537 | #endif |
538 | |
539 | device_initialize(dev: &rdev->wiphy.dev); |
540 | rdev->wiphy.dev.class = &ieee80211_class; |
541 | rdev->wiphy.dev.platform_data = rdev; |
542 | device_enable_async_suspend(dev: &rdev->wiphy.dev); |
543 | |
544 | INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk); |
545 | wiphy_work_init(work: &rdev->sched_scan_stop_wk, func: cfg80211_sched_scan_stop_wk); |
546 | INIT_WORK(&rdev->sched_scan_res_wk, cfg80211_sched_scan_results_wk); |
547 | INIT_WORK(&rdev->propagate_radar_detect_wk, |
548 | cfg80211_propagate_radar_detect_wk); |
549 | INIT_WORK(&rdev->propagate_cac_done_wk, cfg80211_propagate_cac_done_wk); |
550 | INIT_WORK(&rdev->mgmt_registrations_update_wk, |
551 | cfg80211_mgmt_registrations_update_wk); |
552 | spin_lock_init(&rdev->mgmt_registrations_lock); |
553 | |
554 | #ifdef CONFIG_CFG80211_DEFAULT_PS |
555 | rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT; |
556 | #endif |
557 | |
558 | wiphy_net_set(wiphy: &rdev->wiphy, net: &init_net); |
559 | |
560 | rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block; |
561 | rdev->wiphy.rfkill = rfkill_alloc(name: dev_name(dev: &rdev->wiphy.dev), |
562 | parent: &rdev->wiphy.dev, type: RFKILL_TYPE_WLAN, |
563 | ops: &rdev->rfkill_ops, ops_data: rdev); |
564 | |
565 | if (!rdev->wiphy.rfkill) { |
566 | wiphy_free(wiphy: &rdev->wiphy); |
567 | return NULL; |
568 | } |
569 | |
570 | INIT_WORK(&rdev->wiphy_work, cfg80211_wiphy_work); |
571 | INIT_LIST_HEAD(list: &rdev->wiphy_work_list); |
572 | spin_lock_init(&rdev->wiphy_work_lock); |
573 | INIT_WORK(&rdev->rfkill_block, cfg80211_rfkill_block_work); |
574 | INIT_WORK(&rdev->conn_work, cfg80211_conn_work); |
575 | INIT_WORK(&rdev->event_work, cfg80211_event_work); |
576 | INIT_WORK(&rdev->background_cac_abort_wk, |
577 | cfg80211_background_cac_abort_wk); |
578 | INIT_DELAYED_WORK(&rdev->background_cac_done_wk, |
579 | cfg80211_background_cac_done_wk); |
580 | |
581 | init_waitqueue_head(&rdev->dev_wait); |
582 | |
583 | /* |
584 | * Initialize wiphy parameters to IEEE 802.11 MIB default values. |
585 | * Fragmentation and RTS threshold are disabled by default with the |
586 | * special -1 value. |
587 | */ |
588 | rdev->wiphy.retry_short = 7; |
589 | rdev->wiphy.retry_long = 4; |
590 | rdev->wiphy.frag_threshold = (u32) -1; |
591 | rdev->wiphy.rts_threshold = (u32) -1; |
592 | rdev->wiphy.coverage_class = 0; |
593 | |
594 | rdev->wiphy.max_num_csa_counters = 1; |
595 | |
596 | rdev->wiphy.max_sched_scan_plans = 1; |
597 | rdev->wiphy.max_sched_scan_plan_interval = U32_MAX; |
598 | |
599 | return &rdev->wiphy; |
600 | } |
601 | EXPORT_SYMBOL(wiphy_new_nm); |
602 | |
603 | static int wiphy_verify_combinations(struct wiphy *wiphy) |
604 | { |
605 | const struct ieee80211_iface_combination *c; |
606 | int i, j; |
607 | |
608 | for (i = 0; i < wiphy->n_iface_combinations; i++) { |
609 | u32 cnt = 0; |
610 | u16 all_iftypes = 0; |
611 | |
612 | c = &wiphy->iface_combinations[i]; |
613 | |
614 | /* |
615 | * Combinations with just one interface aren't real, |
616 | * however we make an exception for DFS. |
617 | */ |
618 | if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths)) |
619 | return -EINVAL; |
620 | |
621 | /* Need at least one channel */ |
622 | if (WARN_ON(!c->num_different_channels)) |
623 | return -EINVAL; |
624 | |
625 | /* DFS only works on one channel. */ |
626 | if (WARN_ON(c->radar_detect_widths && |
627 | (c->num_different_channels > 1))) |
628 | return -EINVAL; |
629 | |
630 | if (WARN_ON(!c->n_limits)) |
631 | return -EINVAL; |
632 | |
633 | for (j = 0; j < c->n_limits; j++) { |
634 | u16 types = c->limits[j].types; |
635 | |
636 | /* interface types shouldn't overlap */ |
637 | if (WARN_ON(types & all_iftypes)) |
638 | return -EINVAL; |
639 | all_iftypes |= types; |
640 | |
641 | if (WARN_ON(!c->limits[j].max)) |
642 | return -EINVAL; |
643 | |
644 | /* Shouldn't list software iftypes in combinations! */ |
645 | if (WARN_ON(wiphy->software_iftypes & types)) |
646 | return -EINVAL; |
647 | |
648 | /* Only a single P2P_DEVICE can be allowed */ |
649 | if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) && |
650 | c->limits[j].max > 1)) |
651 | return -EINVAL; |
652 | |
653 | /* Only a single NAN can be allowed */ |
654 | if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) && |
655 | c->limits[j].max > 1)) |
656 | return -EINVAL; |
657 | |
658 | /* |
659 | * This isn't well-defined right now. If you have an |
660 | * IBSS interface, then its beacon interval may change |
661 | * by joining other networks, and nothing prevents it |
662 | * from doing that. |
663 | * So technically we probably shouldn't even allow AP |
664 | * and IBSS in the same interface, but it seems that |
665 | * some drivers support that, possibly only with fixed |
666 | * beacon intervals for IBSS. |
667 | */ |
668 | if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) && |
669 | c->beacon_int_min_gcd)) { |
670 | return -EINVAL; |
671 | } |
672 | |
673 | cnt += c->limits[j].max; |
674 | /* |
675 | * Don't advertise an unsupported type |
676 | * in a combination. |
677 | */ |
678 | if (WARN_ON((wiphy->interface_modes & types) != types)) |
679 | return -EINVAL; |
680 | } |
681 | |
682 | if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS))) |
683 | return -EINVAL; |
684 | |
685 | /* You can't even choose that many! */ |
686 | if (WARN_ON(cnt < c->max_interfaces)) |
687 | return -EINVAL; |
688 | } |
689 | |
690 | return 0; |
691 | } |
692 | |
693 | int wiphy_register(struct wiphy *wiphy) |
694 | { |
695 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
696 | int res; |
697 | enum nl80211_band band; |
698 | struct ieee80211_supported_band *sband; |
699 | bool have_band = false; |
700 | int i; |
701 | u16 ifmodes = wiphy->interface_modes; |
702 | |
703 | #ifdef CONFIG_PM |
704 | if (WARN_ON(wiphy->wowlan && |
705 | (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) && |
706 | !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY))) |
707 | return -EINVAL; |
708 | if (WARN_ON(wiphy->wowlan && |
709 | !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns && |
710 | !wiphy->wowlan->tcp)) |
711 | return -EINVAL; |
712 | #endif |
713 | if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && |
714 | (!rdev->ops->tdls_channel_switch || |
715 | !rdev->ops->tdls_cancel_channel_switch))) |
716 | return -EINVAL; |
717 | |
718 | if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) && |
719 | (!rdev->ops->start_nan || !rdev->ops->stop_nan || |
720 | !rdev->ops->add_nan_func || !rdev->ops->del_nan_func || |
721 | !(wiphy->nan_supported_bands & BIT(NL80211_BAND_2GHZ))))) |
722 | return -EINVAL; |
723 | |
724 | if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))) |
725 | return -EINVAL; |
726 | |
727 | if (WARN_ON(wiphy->pmsr_capa && !wiphy->pmsr_capa->ftm.supported)) |
728 | return -EINVAL; |
729 | |
730 | if (wiphy->pmsr_capa && wiphy->pmsr_capa->ftm.supported) { |
731 | if (WARN_ON(!wiphy->pmsr_capa->ftm.asap && |
732 | !wiphy->pmsr_capa->ftm.non_asap)) |
733 | return -EINVAL; |
734 | if (WARN_ON(!wiphy->pmsr_capa->ftm.preambles || |
735 | !wiphy->pmsr_capa->ftm.bandwidths)) |
736 | return -EINVAL; |
737 | if (WARN_ON(wiphy->pmsr_capa->ftm.preambles & |
738 | ~(BIT(NL80211_PREAMBLE_LEGACY) | |
739 | BIT(NL80211_PREAMBLE_HT) | |
740 | BIT(NL80211_PREAMBLE_VHT) | |
741 | BIT(NL80211_PREAMBLE_HE) | |
742 | BIT(NL80211_PREAMBLE_DMG)))) |
743 | return -EINVAL; |
744 | if (WARN_ON((wiphy->pmsr_capa->ftm.trigger_based || |
745 | wiphy->pmsr_capa->ftm.non_trigger_based) && |
746 | !(wiphy->pmsr_capa->ftm.preambles & |
747 | BIT(NL80211_PREAMBLE_HE)))) |
748 | return -EINVAL; |
749 | if (WARN_ON(wiphy->pmsr_capa->ftm.bandwidths & |
750 | ~(BIT(NL80211_CHAN_WIDTH_20_NOHT) | |
751 | BIT(NL80211_CHAN_WIDTH_20) | |
752 | BIT(NL80211_CHAN_WIDTH_40) | |
753 | BIT(NL80211_CHAN_WIDTH_80) | |
754 | BIT(NL80211_CHAN_WIDTH_80P80) | |
755 | BIT(NL80211_CHAN_WIDTH_160) | |
756 | BIT(NL80211_CHAN_WIDTH_5) | |
757 | BIT(NL80211_CHAN_WIDTH_10)))) |
758 | return -EINVAL; |
759 | } |
760 | |
761 | if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) && |
762 | (wiphy->regulatory_flags & |
763 | (REGULATORY_CUSTOM_REG | |
764 | REGULATORY_STRICT_REG | |
765 | REGULATORY_COUNTRY_IE_FOLLOW_POWER | |
766 | REGULATORY_COUNTRY_IE_IGNORE)))) |
767 | return -EINVAL; |
768 | |
769 | if (WARN_ON(wiphy->coalesce && |
770 | (!wiphy->coalesce->n_rules || |
771 | !wiphy->coalesce->n_patterns) && |
772 | (!wiphy->coalesce->pattern_min_len || |
773 | wiphy->coalesce->pattern_min_len > |
774 | wiphy->coalesce->pattern_max_len))) |
775 | return -EINVAL; |
776 | |
777 | if (WARN_ON(wiphy->ap_sme_capa && |
778 | !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME))) |
779 | return -EINVAL; |
780 | |
781 | if (WARN_ON(wiphy->addresses && !wiphy->n_addresses)) |
782 | return -EINVAL; |
783 | |
784 | if (WARN_ON(wiphy->addresses && |
785 | !is_zero_ether_addr(wiphy->perm_addr) && |
786 | memcmp(wiphy->perm_addr, wiphy->addresses[0].addr, |
787 | ETH_ALEN))) |
788 | return -EINVAL; |
789 | |
790 | if (WARN_ON(wiphy->max_acl_mac_addrs && |
791 | (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) || |
792 | !rdev->ops->set_mac_acl))) |
793 | return -EINVAL; |
794 | |
795 | /* assure only valid behaviours are flagged by driver |
796 | * hence subtract 2 as bit 0 is invalid. |
797 | */ |
798 | if (WARN_ON(wiphy->bss_select_support && |
799 | (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2)))) |
800 | return -EINVAL; |
801 | |
802 | if (WARN_ON(wiphy_ext_feature_isset(&rdev->wiphy, |
803 | NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X) && |
804 | (!rdev->ops->set_pmk || !rdev->ops->del_pmk))) |
805 | return -EINVAL; |
806 | |
807 | if (WARN_ON(!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) && |
808 | rdev->ops->update_connect_params)) |
809 | return -EINVAL; |
810 | |
811 | if (wiphy->addresses) |
812 | memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN); |
813 | |
814 | /* sanity check ifmodes */ |
815 | WARN_ON(!ifmodes); |
816 | ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1; |
817 | if (WARN_ON(ifmodes != wiphy->interface_modes)) |
818 | wiphy->interface_modes = ifmodes; |
819 | |
820 | res = wiphy_verify_combinations(wiphy); |
821 | if (res) |
822 | return res; |
823 | |
824 | /* sanity check supported bands/channels */ |
825 | for (band = 0; band < NUM_NL80211_BANDS; band++) { |
826 | const struct ieee80211_sband_iftype_data *iftd; |
827 | u16 types = 0; |
828 | bool have_he = false; |
829 | |
830 | sband = wiphy->bands[band]; |
831 | if (!sband) |
832 | continue; |
833 | |
834 | sband->band = band; |
835 | if (WARN_ON(!sband->n_channels)) |
836 | return -EINVAL; |
837 | /* |
838 | * on 60GHz or sub-1Ghz band, there are no legacy rates, so |
839 | * n_bitrates is 0 |
840 | */ |
841 | if (WARN_ON((band != NL80211_BAND_60GHZ && |
842 | band != NL80211_BAND_S1GHZ) && |
843 | !sband->n_bitrates)) |
844 | return -EINVAL; |
845 | |
846 | if (WARN_ON(band == NL80211_BAND_6GHZ && |
847 | (sband->ht_cap.ht_supported || |
848 | sband->vht_cap.vht_supported))) |
849 | return -EINVAL; |
850 | |
851 | /* |
852 | * Since cfg80211_disable_40mhz_24ghz is global, we can |
853 | * modify the sband's ht data even if the driver uses a |
854 | * global structure for that. |
855 | */ |
856 | if (cfg80211_disable_40mhz_24ghz && |
857 | band == NL80211_BAND_2GHZ && |
858 | sband->ht_cap.ht_supported) { |
859 | sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; |
860 | sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40; |
861 | } |
862 | |
863 | /* |
864 | * Since we use a u32 for rate bitmaps in |
865 | * ieee80211_get_response_rate, we cannot |
866 | * have more than 32 legacy rates. |
867 | */ |
868 | if (WARN_ON(sband->n_bitrates > 32)) |
869 | return -EINVAL; |
870 | |
871 | for (i = 0; i < sband->n_channels; i++) { |
872 | sband->channels[i].orig_flags = |
873 | sband->channels[i].flags; |
874 | sband->channels[i].orig_mag = INT_MAX; |
875 | sband->channels[i].orig_mpwr = |
876 | sband->channels[i].max_power; |
877 | sband->channels[i].band = band; |
878 | |
879 | if (WARN_ON(sband->channels[i].freq_offset >= 1000)) |
880 | return -EINVAL; |
881 | } |
882 | |
883 | for_each_sband_iftype_data(sband, i, iftd) { |
884 | bool has_ap, has_non_ap; |
885 | u32 ap_bits = BIT(NL80211_IFTYPE_AP) | |
886 | BIT(NL80211_IFTYPE_P2P_GO); |
887 | |
888 | if (WARN_ON(!iftd->types_mask)) |
889 | return -EINVAL; |
890 | if (WARN_ON(types & iftd->types_mask)) |
891 | return -EINVAL; |
892 | |
893 | /* at least one piece of information must be present */ |
894 | if (WARN_ON(!iftd->he_cap.has_he)) |
895 | return -EINVAL; |
896 | |
897 | types |= iftd->types_mask; |
898 | |
899 | if (i == 0) |
900 | have_he = iftd->he_cap.has_he; |
901 | else |
902 | have_he = have_he && |
903 | iftd->he_cap.has_he; |
904 | |
905 | has_ap = iftd->types_mask & ap_bits; |
906 | has_non_ap = iftd->types_mask & ~ap_bits; |
907 | |
908 | /* |
909 | * For EHT 20 MHz STA, the capabilities format differs |
910 | * but to simplify, don't check 20 MHz but rather check |
911 | * only if AP and non-AP were mentioned at the same time, |
912 | * reject if so. |
913 | */ |
914 | if (WARN_ON(iftd->eht_cap.has_eht && |
915 | has_ap && has_non_ap)) |
916 | return -EINVAL; |
917 | } |
918 | |
919 | if (WARN_ON(!have_he && band == NL80211_BAND_6GHZ)) |
920 | return -EINVAL; |
921 | |
922 | have_band = true; |
923 | } |
924 | |
925 | if (!have_band) { |
926 | WARN_ON(1); |
927 | return -EINVAL; |
928 | } |
929 | |
930 | for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) { |
931 | /* |
932 | * Validate we have a policy (can be explicitly set to |
933 | * VENDOR_CMD_RAW_DATA which is non-NULL) and also that |
934 | * we have at least one of doit/dumpit. |
935 | */ |
936 | if (WARN_ON(!rdev->wiphy.vendor_commands[i].policy)) |
937 | return -EINVAL; |
938 | if (WARN_ON(!rdev->wiphy.vendor_commands[i].doit && |
939 | !rdev->wiphy.vendor_commands[i].dumpit)) |
940 | return -EINVAL; |
941 | } |
942 | |
943 | #ifdef CONFIG_PM |
944 | if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns && |
945 | (!rdev->wiphy.wowlan->pattern_min_len || |
946 | rdev->wiphy.wowlan->pattern_min_len > |
947 | rdev->wiphy.wowlan->pattern_max_len))) |
948 | return -EINVAL; |
949 | #endif |
950 | |
951 | if (!wiphy->max_num_akm_suites) |
952 | wiphy->max_num_akm_suites = NL80211_MAX_NR_AKM_SUITES; |
953 | else if (wiphy->max_num_akm_suites < NL80211_MAX_NR_AKM_SUITES || |
954 | wiphy->max_num_akm_suites > CFG80211_MAX_NUM_AKM_SUITES) |
955 | return -EINVAL; |
956 | |
957 | /* check and set up bitrates */ |
958 | ieee80211_set_bitrate_flags(wiphy); |
959 | |
960 | rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH; |
961 | |
962 | rtnl_lock(); |
963 | wiphy_lock(wiphy: &rdev->wiphy); |
964 | res = device_add(dev: &rdev->wiphy.dev); |
965 | if (res) { |
966 | wiphy_unlock(wiphy: &rdev->wiphy); |
967 | rtnl_unlock(); |
968 | return res; |
969 | } |
970 | |
971 | list_add_rcu(new: &rdev->list, head: &cfg80211_rdev_list); |
972 | cfg80211_rdev_list_generation++; |
973 | |
974 | /* add to debugfs */ |
975 | rdev->wiphy.debugfsdir = debugfs_create_dir(name: wiphy_name(wiphy: &rdev->wiphy), |
976 | parent: ieee80211_debugfs_dir); |
977 | |
978 | cfg80211_debugfs_rdev_add(rdev); |
979 | nl80211_notify_wiphy(rdev, cmd: NL80211_CMD_NEW_WIPHY); |
980 | wiphy_unlock(wiphy: &rdev->wiphy); |
981 | |
982 | /* set up regulatory info */ |
983 | wiphy_regulatory_register(wiphy); |
984 | |
985 | if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) { |
986 | struct regulatory_request request; |
987 | |
988 | request.wiphy_idx = get_wiphy_idx(wiphy); |
989 | request.initiator = NL80211_REGDOM_SET_BY_DRIVER; |
990 | request.alpha2[0] = '9'; |
991 | request.alpha2[1] = '9'; |
992 | |
993 | nl80211_send_reg_change_event(request: &request); |
994 | } |
995 | |
996 | /* Check that nobody globally advertises any capabilities they do not |
997 | * advertise on all possible interface types. |
998 | */ |
999 | if (wiphy->extended_capabilities_len && |
1000 | wiphy->num_iftype_ext_capab && |
1001 | wiphy->iftype_ext_capab) { |
1002 | u8 supported_on_all, j; |
1003 | const struct wiphy_iftype_ext_capab *capab; |
1004 | |
1005 | capab = wiphy->iftype_ext_capab; |
1006 | for (j = 0; j < wiphy->extended_capabilities_len; j++) { |
1007 | if (capab[0].extended_capabilities_len > j) |
1008 | supported_on_all = |
1009 | capab[0].extended_capabilities[j]; |
1010 | else |
1011 | supported_on_all = 0x00; |
1012 | for (i = 1; i < wiphy->num_iftype_ext_capab; i++) { |
1013 | if (j >= capab[i].extended_capabilities_len) { |
1014 | supported_on_all = 0x00; |
1015 | break; |
1016 | } |
1017 | supported_on_all &= |
1018 | capab[i].extended_capabilities[j]; |
1019 | } |
1020 | if (WARN_ON(wiphy->extended_capabilities[j] & |
1021 | ~supported_on_all)) |
1022 | break; |
1023 | } |
1024 | } |
1025 | |
1026 | rdev->wiphy.registered = true; |
1027 | rtnl_unlock(); |
1028 | |
1029 | res = rfkill_register(rfkill: rdev->wiphy.rfkill); |
1030 | if (res) { |
1031 | rfkill_destroy(rfkill: rdev->wiphy.rfkill); |
1032 | rdev->wiphy.rfkill = NULL; |
1033 | wiphy_unregister(wiphy: &rdev->wiphy); |
1034 | return res; |
1035 | } |
1036 | |
1037 | return 0; |
1038 | } |
1039 | EXPORT_SYMBOL(wiphy_register); |
1040 | |
1041 | void wiphy_rfkill_start_polling(struct wiphy *wiphy) |
1042 | { |
1043 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
1044 | |
1045 | if (!rdev->ops->rfkill_poll) |
1046 | return; |
1047 | rdev->rfkill_ops.poll = cfg80211_rfkill_poll; |
1048 | rfkill_resume_polling(rfkill: wiphy->rfkill); |
1049 | } |
1050 | EXPORT_SYMBOL(wiphy_rfkill_start_polling); |
1051 | |
1052 | void cfg80211_process_wiphy_works(struct cfg80211_registered_device *rdev, |
1053 | struct wiphy_work *end) |
1054 | { |
1055 | unsigned int runaway_limit = 100; |
1056 | unsigned long flags; |
1057 | |
1058 | lockdep_assert_held(&rdev->wiphy.mtx); |
1059 | |
1060 | spin_lock_irqsave(&rdev->wiphy_work_lock, flags); |
1061 | while (!list_empty(head: &rdev->wiphy_work_list)) { |
1062 | struct wiphy_work *wk; |
1063 | |
1064 | wk = list_first_entry(&rdev->wiphy_work_list, |
1065 | struct wiphy_work, entry); |
1066 | list_del_init(entry: &wk->entry); |
1067 | spin_unlock_irqrestore(lock: &rdev->wiphy_work_lock, flags); |
1068 | |
1069 | wk->func(&rdev->wiphy, wk); |
1070 | |
1071 | spin_lock_irqsave(&rdev->wiphy_work_lock, flags); |
1072 | |
1073 | if (wk == end) |
1074 | break; |
1075 | |
1076 | if (WARN_ON(--runaway_limit == 0)) |
1077 | INIT_LIST_HEAD(list: &rdev->wiphy_work_list); |
1078 | } |
1079 | spin_unlock_irqrestore(lock: &rdev->wiphy_work_lock, flags); |
1080 | } |
1081 | |
1082 | void wiphy_unregister(struct wiphy *wiphy) |
1083 | { |
1084 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
1085 | |
1086 | wait_event(rdev->dev_wait, ({ |
1087 | int __count; |
1088 | wiphy_lock(&rdev->wiphy); |
1089 | __count = rdev->opencount; |
1090 | wiphy_unlock(&rdev->wiphy); |
1091 | __count == 0; })); |
1092 | |
1093 | if (rdev->wiphy.rfkill) |
1094 | rfkill_unregister(rfkill: rdev->wiphy.rfkill); |
1095 | |
1096 | rtnl_lock(); |
1097 | wiphy_lock(wiphy: &rdev->wiphy); |
1098 | nl80211_notify_wiphy(rdev, cmd: NL80211_CMD_DEL_WIPHY); |
1099 | rdev->wiphy.registered = false; |
1100 | |
1101 | WARN_ON(!list_empty(&rdev->wiphy.wdev_list)); |
1102 | |
1103 | /* |
1104 | * First remove the hardware from everywhere, this makes |
1105 | * it impossible to find from userspace. |
1106 | */ |
1107 | debugfs_remove_recursive(dentry: rdev->wiphy.debugfsdir); |
1108 | list_del_rcu(entry: &rdev->list); |
1109 | synchronize_rcu(); |
1110 | |
1111 | /* |
1112 | * If this device got a regulatory hint tell core its |
1113 | * free to listen now to a new shiny device regulatory hint |
1114 | */ |
1115 | wiphy_regulatory_deregister(wiphy); |
1116 | |
1117 | cfg80211_rdev_list_generation++; |
1118 | device_del(dev: &rdev->wiphy.dev); |
1119 | |
1120 | #ifdef CONFIG_PM |
1121 | if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup) |
1122 | rdev_set_wakeup(rdev, enabled: false); |
1123 | #endif |
1124 | |
1125 | /* surely nothing is reachable now, clean up work */ |
1126 | cfg80211_process_wiphy_works(rdev, NULL); |
1127 | wiphy_unlock(wiphy: &rdev->wiphy); |
1128 | rtnl_unlock(); |
1129 | |
1130 | /* this has nothing to do now but make sure it's gone */ |
1131 | cancel_work_sync(work: &rdev->wiphy_work); |
1132 | |
1133 | cancel_work_sync(work: &rdev->conn_work); |
1134 | flush_work(work: &rdev->event_work); |
1135 | cancel_delayed_work_sync(dwork: &rdev->dfs_update_channels_wk); |
1136 | cancel_delayed_work_sync(dwork: &rdev->background_cac_done_wk); |
1137 | flush_work(work: &rdev->destroy_work); |
1138 | flush_work(work: &rdev->propagate_radar_detect_wk); |
1139 | flush_work(work: &rdev->propagate_cac_done_wk); |
1140 | flush_work(work: &rdev->mgmt_registrations_update_wk); |
1141 | flush_work(work: &rdev->background_cac_abort_wk); |
1142 | |
1143 | cfg80211_rdev_free_wowlan(rdev); |
1144 | cfg80211_rdev_free_coalesce(rdev); |
1145 | } |
1146 | EXPORT_SYMBOL(wiphy_unregister); |
1147 | |
1148 | void cfg80211_dev_free(struct cfg80211_registered_device *rdev) |
1149 | { |
1150 | struct cfg80211_internal_bss *scan, *tmp; |
1151 | struct cfg80211_beacon_registration *reg, *treg; |
1152 | rfkill_destroy(rfkill: rdev->wiphy.rfkill); |
1153 | list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) { |
1154 | list_del(entry: ®->list); |
1155 | kfree(objp: reg); |
1156 | } |
1157 | list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list) |
1158 | cfg80211_put_bss(wiphy: &rdev->wiphy, bss: &scan->pub); |
1159 | mutex_destroy(lock: &rdev->wiphy.mtx); |
1160 | |
1161 | /* |
1162 | * The 'regd' can only be non-NULL if we never finished |
1163 | * initializing the wiphy and thus never went through the |
1164 | * unregister path - e.g. in failure scenarios. Thus, it |
1165 | * cannot have been visible to anyone if non-NULL, so we |
1166 | * can just free it here. |
1167 | */ |
1168 | kfree(rcu_dereference_raw(rdev->wiphy.regd)); |
1169 | |
1170 | kfree(objp: rdev); |
1171 | } |
1172 | |
1173 | void wiphy_free(struct wiphy *wiphy) |
1174 | { |
1175 | put_device(dev: &wiphy->dev); |
1176 | } |
1177 | EXPORT_SYMBOL(wiphy_free); |
1178 | |
1179 | void wiphy_rfkill_set_hw_state_reason(struct wiphy *wiphy, bool blocked, |
1180 | enum rfkill_hard_block_reasons reason) |
1181 | { |
1182 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
1183 | |
1184 | if (rfkill_set_hw_state_reason(rfkill: wiphy->rfkill, blocked, reason)) |
1185 | schedule_work(work: &rdev->rfkill_block); |
1186 | } |
1187 | EXPORT_SYMBOL(wiphy_rfkill_set_hw_state_reason); |
1188 | |
1189 | static void _cfg80211_unregister_wdev(struct wireless_dev *wdev, |
1190 | bool unregister_netdev) |
1191 | { |
1192 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy: wdev->wiphy); |
1193 | struct cfg80211_cqm_config *cqm_config; |
1194 | unsigned int link_id; |
1195 | |
1196 | ASSERT_RTNL(); |
1197 | lockdep_assert_held(&rdev->wiphy.mtx); |
1198 | |
1199 | nl80211_notify_iface(rdev, wdev, cmd: NL80211_CMD_DEL_INTERFACE); |
1200 | |
1201 | wdev->registered = false; |
1202 | |
1203 | if (wdev->netdev) { |
1204 | sysfs_remove_link(kobj: &wdev->netdev->dev.kobj, name: "phy80211" ); |
1205 | if (unregister_netdev) |
1206 | unregister_netdevice(dev: wdev->netdev); |
1207 | } |
1208 | |
1209 | list_del_rcu(entry: &wdev->list); |
1210 | synchronize_net(); |
1211 | rdev->devlist_generation++; |
1212 | |
1213 | cfg80211_mlme_purge_registrations(wdev); |
1214 | |
1215 | switch (wdev->iftype) { |
1216 | case NL80211_IFTYPE_P2P_DEVICE: |
1217 | cfg80211_stop_p2p_device(rdev, wdev); |
1218 | break; |
1219 | case NL80211_IFTYPE_NAN: |
1220 | cfg80211_stop_nan(rdev, wdev); |
1221 | break; |
1222 | default: |
1223 | break; |
1224 | } |
1225 | |
1226 | #ifdef CONFIG_CFG80211_WEXT |
1227 | kfree_sensitive(objp: wdev->wext.keys); |
1228 | wdev->wext.keys = NULL; |
1229 | #endif |
1230 | wiphy_work_cancel(wiphy: wdev->wiphy, work: &wdev->cqm_rssi_work); |
1231 | /* deleted from the list, so can't be found from nl80211 any more */ |
1232 | cqm_config = rcu_access_pointer(wdev->cqm_config); |
1233 | kfree_rcu(cqm_config, rcu_head); |
1234 | |
1235 | /* |
1236 | * Ensure that all events have been processed and |
1237 | * freed. |
1238 | */ |
1239 | cfg80211_process_wdev_events(wdev); |
1240 | |
1241 | if (wdev->iftype == NL80211_IFTYPE_STATION || |
1242 | wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) { |
1243 | for (link_id = 0; link_id < ARRAY_SIZE(wdev->links); link_id++) { |
1244 | struct cfg80211_internal_bss *curbss; |
1245 | |
1246 | curbss = wdev->links[link_id].client.current_bss; |
1247 | |
1248 | if (WARN_ON(curbss)) { |
1249 | cfg80211_unhold_bss(bss: curbss); |
1250 | cfg80211_put_bss(wiphy: wdev->wiphy, bss: &curbss->pub); |
1251 | wdev->links[link_id].client.current_bss = NULL; |
1252 | } |
1253 | } |
1254 | } |
1255 | |
1256 | wdev->connected = false; |
1257 | } |
1258 | |
1259 | void cfg80211_unregister_wdev(struct wireless_dev *wdev) |
1260 | { |
1261 | _cfg80211_unregister_wdev(wdev, unregister_netdev: true); |
1262 | } |
1263 | EXPORT_SYMBOL(cfg80211_unregister_wdev); |
1264 | |
1265 | static const struct device_type wiphy_type = { |
1266 | .name = "wlan" , |
1267 | }; |
1268 | |
1269 | void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev, |
1270 | enum nl80211_iftype iftype, int num) |
1271 | { |
1272 | lockdep_assert_held(&rdev->wiphy.mtx); |
1273 | |
1274 | rdev->num_running_ifaces += num; |
1275 | if (iftype == NL80211_IFTYPE_MONITOR) |
1276 | rdev->num_running_monitor_ifaces += num; |
1277 | } |
1278 | |
1279 | void cfg80211_leave(struct cfg80211_registered_device *rdev, |
1280 | struct wireless_dev *wdev) |
1281 | { |
1282 | struct net_device *dev = wdev->netdev; |
1283 | struct cfg80211_sched_scan_request *pos, *tmp; |
1284 | |
1285 | lockdep_assert_held(&rdev->wiphy.mtx); |
1286 | |
1287 | cfg80211_pmsr_wdev_down(wdev); |
1288 | |
1289 | cfg80211_stop_background_radar_detection(wdev); |
1290 | |
1291 | switch (wdev->iftype) { |
1292 | case NL80211_IFTYPE_ADHOC: |
1293 | cfg80211_leave_ibss(rdev, dev, nowext: true); |
1294 | break; |
1295 | case NL80211_IFTYPE_P2P_CLIENT: |
1296 | case NL80211_IFTYPE_STATION: |
1297 | list_for_each_entry_safe(pos, tmp, &rdev->sched_scan_req_list, |
1298 | list) { |
1299 | if (dev == pos->dev) |
1300 | cfg80211_stop_sched_scan_req(rdev, req: pos, driver_initiated: false); |
1301 | } |
1302 | |
1303 | #ifdef CONFIG_CFG80211_WEXT |
1304 | kfree(objp: wdev->wext.ie); |
1305 | wdev->wext.ie = NULL; |
1306 | wdev->wext.ie_len = 0; |
1307 | wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; |
1308 | #endif |
1309 | cfg80211_disconnect(rdev, dev, |
1310 | reason: WLAN_REASON_DEAUTH_LEAVING, wextev: true); |
1311 | break; |
1312 | case NL80211_IFTYPE_MESH_POINT: |
1313 | cfg80211_leave_mesh(rdev, dev); |
1314 | break; |
1315 | case NL80211_IFTYPE_AP: |
1316 | case NL80211_IFTYPE_P2P_GO: |
1317 | cfg80211_stop_ap(rdev, dev, link: -1, notify: true); |
1318 | break; |
1319 | case NL80211_IFTYPE_OCB: |
1320 | cfg80211_leave_ocb(rdev, dev); |
1321 | break; |
1322 | case NL80211_IFTYPE_P2P_DEVICE: |
1323 | case NL80211_IFTYPE_NAN: |
1324 | /* cannot happen, has no netdev */ |
1325 | break; |
1326 | case NL80211_IFTYPE_AP_VLAN: |
1327 | case NL80211_IFTYPE_MONITOR: |
1328 | /* nothing to do */ |
1329 | break; |
1330 | case NL80211_IFTYPE_UNSPECIFIED: |
1331 | case NL80211_IFTYPE_WDS: |
1332 | case NUM_NL80211_IFTYPES: |
1333 | /* invalid */ |
1334 | break; |
1335 | } |
1336 | } |
1337 | |
1338 | void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev, |
1339 | gfp_t gfp) |
1340 | { |
1341 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
1342 | struct cfg80211_event *ev; |
1343 | unsigned long flags; |
1344 | |
1345 | trace_cfg80211_stop_iface(wiphy, wdev); |
1346 | |
1347 | ev = kzalloc(size: sizeof(*ev), flags: gfp); |
1348 | if (!ev) |
1349 | return; |
1350 | |
1351 | ev->type = EVENT_STOPPED; |
1352 | |
1353 | spin_lock_irqsave(&wdev->event_lock, flags); |
1354 | list_add_tail(new: &ev->list, head: &wdev->event_list); |
1355 | spin_unlock_irqrestore(lock: &wdev->event_lock, flags); |
1356 | queue_work(wq: cfg80211_wq, work: &rdev->event_work); |
1357 | } |
1358 | EXPORT_SYMBOL(cfg80211_stop_iface); |
1359 | |
1360 | void cfg80211_init_wdev(struct wireless_dev *wdev) |
1361 | { |
1362 | INIT_LIST_HEAD(list: &wdev->event_list); |
1363 | spin_lock_init(&wdev->event_lock); |
1364 | INIT_LIST_HEAD(list: &wdev->mgmt_registrations); |
1365 | INIT_LIST_HEAD(list: &wdev->pmsr_list); |
1366 | spin_lock_init(&wdev->pmsr_lock); |
1367 | INIT_WORK(&wdev->pmsr_free_wk, cfg80211_pmsr_free_wk); |
1368 | |
1369 | #ifdef CONFIG_CFG80211_WEXT |
1370 | wdev->wext.default_key = -1; |
1371 | wdev->wext.default_mgmt_key = -1; |
1372 | wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC; |
1373 | #endif |
1374 | |
1375 | wiphy_work_init(work: &wdev->cqm_rssi_work, func: cfg80211_cqm_rssi_notify_work); |
1376 | |
1377 | if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT) |
1378 | wdev->ps = true; |
1379 | else |
1380 | wdev->ps = false; |
1381 | /* allow mac80211 to determine the timeout */ |
1382 | wdev->ps_timeout = -1; |
1383 | |
1384 | if ((wdev->iftype == NL80211_IFTYPE_STATION || |
1385 | wdev->iftype == NL80211_IFTYPE_P2P_CLIENT || |
1386 | wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr) |
1387 | wdev->netdev->priv_flags |= IFF_DONT_BRIDGE; |
1388 | |
1389 | INIT_WORK(&wdev->disconnect_wk, cfg80211_autodisconnect_wk); |
1390 | } |
1391 | |
1392 | void cfg80211_register_wdev(struct cfg80211_registered_device *rdev, |
1393 | struct wireless_dev *wdev) |
1394 | { |
1395 | ASSERT_RTNL(); |
1396 | lockdep_assert_held(&rdev->wiphy.mtx); |
1397 | |
1398 | /* |
1399 | * We get here also when the interface changes network namespaces, |
1400 | * as it's registered into the new one, but we don't want it to |
1401 | * change ID in that case. Checking if the ID is already assigned |
1402 | * works, because 0 isn't considered a valid ID and the memory is |
1403 | * 0-initialized. |
1404 | */ |
1405 | if (!wdev->identifier) |
1406 | wdev->identifier = ++rdev->wdev_id; |
1407 | list_add_rcu(new: &wdev->list, head: &rdev->wiphy.wdev_list); |
1408 | rdev->devlist_generation++; |
1409 | wdev->registered = true; |
1410 | |
1411 | if (wdev->netdev && |
1412 | sysfs_create_link(kobj: &wdev->netdev->dev.kobj, target: &rdev->wiphy.dev.kobj, |
1413 | name: "phy80211" )) |
1414 | pr_err("failed to add phy80211 symlink to netdev!\n" ); |
1415 | |
1416 | nl80211_notify_iface(rdev, wdev, cmd: NL80211_CMD_NEW_INTERFACE); |
1417 | } |
1418 | |
1419 | int cfg80211_register_netdevice(struct net_device *dev) |
1420 | { |
1421 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
1422 | struct cfg80211_registered_device *rdev; |
1423 | int ret; |
1424 | |
1425 | ASSERT_RTNL(); |
1426 | |
1427 | if (WARN_ON(!wdev)) |
1428 | return -EINVAL; |
1429 | |
1430 | rdev = wiphy_to_rdev(wiphy: wdev->wiphy); |
1431 | |
1432 | lockdep_assert_held(&rdev->wiphy.mtx); |
1433 | |
1434 | /* we'll take care of this */ |
1435 | wdev->registered = true; |
1436 | wdev->registering = true; |
1437 | ret = register_netdevice(dev); |
1438 | if (ret) |
1439 | goto out; |
1440 | |
1441 | cfg80211_register_wdev(rdev, wdev); |
1442 | ret = 0; |
1443 | out: |
1444 | wdev->registering = false; |
1445 | if (ret) |
1446 | wdev->registered = false; |
1447 | return ret; |
1448 | } |
1449 | EXPORT_SYMBOL(cfg80211_register_netdevice); |
1450 | |
1451 | static int cfg80211_netdev_notifier_call(struct notifier_block *nb, |
1452 | unsigned long state, void *ptr) |
1453 | { |
1454 | struct net_device *dev = netdev_notifier_info_to_dev(info: ptr); |
1455 | struct wireless_dev *wdev = dev->ieee80211_ptr; |
1456 | struct cfg80211_registered_device *rdev; |
1457 | struct cfg80211_sched_scan_request *pos, *tmp; |
1458 | |
1459 | if (!wdev) |
1460 | return NOTIFY_DONE; |
1461 | |
1462 | rdev = wiphy_to_rdev(wiphy: wdev->wiphy); |
1463 | |
1464 | WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED); |
1465 | |
1466 | switch (state) { |
1467 | case NETDEV_POST_INIT: |
1468 | SET_NETDEV_DEVTYPE(dev, &wiphy_type); |
1469 | wdev->netdev = dev; |
1470 | /* can only change netns with wiphy */ |
1471 | dev->features |= NETIF_F_NETNS_LOCAL; |
1472 | |
1473 | cfg80211_init_wdev(wdev); |
1474 | break; |
1475 | case NETDEV_REGISTER: |
1476 | if (!wdev->registered) { |
1477 | wiphy_lock(wiphy: &rdev->wiphy); |
1478 | cfg80211_register_wdev(rdev, wdev); |
1479 | wiphy_unlock(wiphy: &rdev->wiphy); |
1480 | } |
1481 | break; |
1482 | case NETDEV_UNREGISTER: |
1483 | /* |
1484 | * It is possible to get NETDEV_UNREGISTER multiple times, |
1485 | * so check wdev->registered. |
1486 | */ |
1487 | if (wdev->registered && !wdev->registering) { |
1488 | wiphy_lock(wiphy: &rdev->wiphy); |
1489 | _cfg80211_unregister_wdev(wdev, unregister_netdev: false); |
1490 | wiphy_unlock(wiphy: &rdev->wiphy); |
1491 | } |
1492 | break; |
1493 | case NETDEV_GOING_DOWN: |
1494 | wiphy_lock(wiphy: &rdev->wiphy); |
1495 | cfg80211_leave(rdev, wdev); |
1496 | cfg80211_remove_links(wdev); |
1497 | wiphy_unlock(wiphy: &rdev->wiphy); |
1498 | /* since we just did cfg80211_leave() nothing to do there */ |
1499 | cancel_work_sync(work: &wdev->disconnect_wk); |
1500 | cancel_work_sync(work: &wdev->pmsr_free_wk); |
1501 | break; |
1502 | case NETDEV_DOWN: |
1503 | wiphy_lock(wiphy: &rdev->wiphy); |
1504 | cfg80211_update_iface_num(rdev, iftype: wdev->iftype, num: -1); |
1505 | if (rdev->scan_req && rdev->scan_req->wdev == wdev) { |
1506 | if (WARN_ON(!rdev->scan_req->notified && |
1507 | (!rdev->int_scan_req || |
1508 | !rdev->int_scan_req->notified))) |
1509 | rdev->scan_req->info.aborted = true; |
1510 | ___cfg80211_scan_done(rdev, send_message: false); |
1511 | } |
1512 | |
1513 | list_for_each_entry_safe(pos, tmp, |
1514 | &rdev->sched_scan_req_list, list) { |
1515 | if (WARN_ON(pos->dev == wdev->netdev)) |
1516 | cfg80211_stop_sched_scan_req(rdev, req: pos, driver_initiated: false); |
1517 | } |
1518 | |
1519 | rdev->opencount--; |
1520 | wiphy_unlock(wiphy: &rdev->wiphy); |
1521 | wake_up(&rdev->dev_wait); |
1522 | break; |
1523 | case NETDEV_UP: |
1524 | wiphy_lock(wiphy: &rdev->wiphy); |
1525 | cfg80211_update_iface_num(rdev, iftype: wdev->iftype, num: 1); |
1526 | switch (wdev->iftype) { |
1527 | #ifdef CONFIG_CFG80211_WEXT |
1528 | case NL80211_IFTYPE_ADHOC: |
1529 | cfg80211_ibss_wext_join(rdev, wdev); |
1530 | break; |
1531 | case NL80211_IFTYPE_STATION: |
1532 | cfg80211_mgd_wext_connect(rdev, wdev); |
1533 | break; |
1534 | #endif |
1535 | #ifdef CONFIG_MAC80211_MESH |
1536 | case NL80211_IFTYPE_MESH_POINT: |
1537 | { |
1538 | /* backward compat code... */ |
1539 | struct mesh_setup setup; |
1540 | memcpy(&setup, &default_mesh_setup, |
1541 | sizeof(setup)); |
1542 | /* back compat only needed for mesh_id */ |
1543 | setup.mesh_id = wdev->u.mesh.id; |
1544 | setup.mesh_id_len = wdev->u.mesh.id_up_len; |
1545 | if (wdev->u.mesh.id_up_len) |
1546 | __cfg80211_join_mesh(rdev, dev, |
1547 | setup: &setup, |
1548 | conf: &default_mesh_config); |
1549 | break; |
1550 | } |
1551 | #endif |
1552 | default: |
1553 | break; |
1554 | } |
1555 | rdev->opencount++; |
1556 | |
1557 | /* |
1558 | * Configure power management to the driver here so that its |
1559 | * correctly set also after interface type changes etc. |
1560 | */ |
1561 | if ((wdev->iftype == NL80211_IFTYPE_STATION || |
1562 | wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) && |
1563 | rdev->ops->set_power_mgmt && |
1564 | rdev_set_power_mgmt(rdev, dev, enabled: wdev->ps, |
1565 | timeout: wdev->ps_timeout)) { |
1566 | /* assume this means it's off */ |
1567 | wdev->ps = false; |
1568 | } |
1569 | wiphy_unlock(wiphy: &rdev->wiphy); |
1570 | break; |
1571 | case NETDEV_PRE_UP: |
1572 | if (!cfg80211_iftype_allowed(wiphy: wdev->wiphy, iftype: wdev->iftype, |
1573 | is_4addr: wdev->use_4addr, check_swif: 0)) |
1574 | return notifier_from_errno(err: -EOPNOTSUPP); |
1575 | |
1576 | if (rfkill_blocked(rfkill: rdev->wiphy.rfkill)) |
1577 | return notifier_from_errno(err: -ERFKILL); |
1578 | break; |
1579 | default: |
1580 | return NOTIFY_DONE; |
1581 | } |
1582 | |
1583 | wireless_nlevent_flush(); |
1584 | |
1585 | return NOTIFY_OK; |
1586 | } |
1587 | |
1588 | static struct notifier_block cfg80211_netdev_notifier = { |
1589 | .notifier_call = cfg80211_netdev_notifier_call, |
1590 | }; |
1591 | |
1592 | static void __net_exit cfg80211_pernet_exit(struct net *net) |
1593 | { |
1594 | struct cfg80211_registered_device *rdev; |
1595 | |
1596 | rtnl_lock(); |
1597 | for_each_rdev(rdev) { |
1598 | if (net_eq(net1: wiphy_net(wiphy: &rdev->wiphy), net2: net)) |
1599 | WARN_ON(cfg80211_switch_netns(rdev, &init_net)); |
1600 | } |
1601 | rtnl_unlock(); |
1602 | } |
1603 | |
1604 | static struct pernet_operations cfg80211_pernet_ops = { |
1605 | .exit = cfg80211_pernet_exit, |
1606 | }; |
1607 | |
1608 | void wiphy_work_queue(struct wiphy *wiphy, struct wiphy_work *work) |
1609 | { |
1610 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
1611 | unsigned long flags; |
1612 | |
1613 | spin_lock_irqsave(&rdev->wiphy_work_lock, flags); |
1614 | if (list_empty(head: &work->entry)) |
1615 | list_add_tail(new: &work->entry, head: &rdev->wiphy_work_list); |
1616 | spin_unlock_irqrestore(lock: &rdev->wiphy_work_lock, flags); |
1617 | |
1618 | queue_work(wq: system_unbound_wq, work: &rdev->wiphy_work); |
1619 | } |
1620 | EXPORT_SYMBOL_GPL(wiphy_work_queue); |
1621 | |
1622 | void wiphy_work_cancel(struct wiphy *wiphy, struct wiphy_work *work) |
1623 | { |
1624 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
1625 | unsigned long flags; |
1626 | |
1627 | lockdep_assert_held(&wiphy->mtx); |
1628 | |
1629 | spin_lock_irqsave(&rdev->wiphy_work_lock, flags); |
1630 | if (!list_empty(head: &work->entry)) |
1631 | list_del_init(entry: &work->entry); |
1632 | spin_unlock_irqrestore(lock: &rdev->wiphy_work_lock, flags); |
1633 | } |
1634 | EXPORT_SYMBOL_GPL(wiphy_work_cancel); |
1635 | |
1636 | void wiphy_work_flush(struct wiphy *wiphy, struct wiphy_work *work) |
1637 | { |
1638 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
1639 | unsigned long flags; |
1640 | bool run; |
1641 | |
1642 | spin_lock_irqsave(&rdev->wiphy_work_lock, flags); |
1643 | run = !work || !list_empty(head: &work->entry); |
1644 | spin_unlock_irqrestore(lock: &rdev->wiphy_work_lock, flags); |
1645 | |
1646 | if (run) |
1647 | cfg80211_process_wiphy_works(rdev, end: work); |
1648 | } |
1649 | EXPORT_SYMBOL_GPL(wiphy_work_flush); |
1650 | |
1651 | void wiphy_delayed_work_timer(struct timer_list *t) |
1652 | { |
1653 | struct wiphy_delayed_work *dwork = from_timer(dwork, t, timer); |
1654 | |
1655 | wiphy_work_queue(dwork->wiphy, &dwork->work); |
1656 | } |
1657 | EXPORT_SYMBOL(wiphy_delayed_work_timer); |
1658 | |
1659 | void wiphy_delayed_work_queue(struct wiphy *wiphy, |
1660 | struct wiphy_delayed_work *dwork, |
1661 | unsigned long delay) |
1662 | { |
1663 | if (!delay) { |
1664 | del_timer(timer: &dwork->timer); |
1665 | wiphy_work_queue(wiphy, &dwork->work); |
1666 | return; |
1667 | } |
1668 | |
1669 | dwork->wiphy = wiphy; |
1670 | mod_timer(timer: &dwork->timer, expires: jiffies + delay); |
1671 | } |
1672 | EXPORT_SYMBOL_GPL(wiphy_delayed_work_queue); |
1673 | |
1674 | void wiphy_delayed_work_cancel(struct wiphy *wiphy, |
1675 | struct wiphy_delayed_work *dwork) |
1676 | { |
1677 | lockdep_assert_held(&wiphy->mtx); |
1678 | |
1679 | del_timer_sync(timer: &dwork->timer); |
1680 | wiphy_work_cancel(wiphy, &dwork->work); |
1681 | } |
1682 | EXPORT_SYMBOL_GPL(wiphy_delayed_work_cancel); |
1683 | |
1684 | void wiphy_delayed_work_flush(struct wiphy *wiphy, |
1685 | struct wiphy_delayed_work *dwork) |
1686 | { |
1687 | lockdep_assert_held(&wiphy->mtx); |
1688 | |
1689 | del_timer_sync(timer: &dwork->timer); |
1690 | wiphy_work_flush(wiphy, &dwork->work); |
1691 | } |
1692 | EXPORT_SYMBOL_GPL(wiphy_delayed_work_flush); |
1693 | |
1694 | static int __init cfg80211_init(void) |
1695 | { |
1696 | int err; |
1697 | |
1698 | err = register_pernet_device(&cfg80211_pernet_ops); |
1699 | if (err) |
1700 | goto out_fail_pernet; |
1701 | |
1702 | err = wiphy_sysfs_init(); |
1703 | if (err) |
1704 | goto out_fail_sysfs; |
1705 | |
1706 | err = register_netdevice_notifier(nb: &cfg80211_netdev_notifier); |
1707 | if (err) |
1708 | goto out_fail_notifier; |
1709 | |
1710 | err = nl80211_init(); |
1711 | if (err) |
1712 | goto out_fail_nl80211; |
1713 | |
1714 | ieee80211_debugfs_dir = debugfs_create_dir(name: "ieee80211" , NULL); |
1715 | |
1716 | err = regulatory_init(); |
1717 | if (err) |
1718 | goto out_fail_reg; |
1719 | |
1720 | cfg80211_wq = alloc_ordered_workqueue("cfg80211" , WQ_MEM_RECLAIM); |
1721 | if (!cfg80211_wq) { |
1722 | err = -ENOMEM; |
1723 | goto out_fail_wq; |
1724 | } |
1725 | |
1726 | return 0; |
1727 | |
1728 | out_fail_wq: |
1729 | regulatory_exit(); |
1730 | out_fail_reg: |
1731 | debugfs_remove(dentry: ieee80211_debugfs_dir); |
1732 | nl80211_exit(); |
1733 | out_fail_nl80211: |
1734 | unregister_netdevice_notifier(nb: &cfg80211_netdev_notifier); |
1735 | out_fail_notifier: |
1736 | wiphy_sysfs_exit(); |
1737 | out_fail_sysfs: |
1738 | unregister_pernet_device(&cfg80211_pernet_ops); |
1739 | out_fail_pernet: |
1740 | return err; |
1741 | } |
1742 | fs_initcall(cfg80211_init); |
1743 | |
1744 | static void __exit cfg80211_exit(void) |
1745 | { |
1746 | debugfs_remove(dentry: ieee80211_debugfs_dir); |
1747 | nl80211_exit(); |
1748 | unregister_netdevice_notifier(nb: &cfg80211_netdev_notifier); |
1749 | wiphy_sysfs_exit(); |
1750 | regulatory_exit(); |
1751 | unregister_pernet_device(&cfg80211_pernet_ops); |
1752 | destroy_workqueue(wq: cfg80211_wq); |
1753 | } |
1754 | module_exit(cfg80211_exit); |
1755 | |