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) 2018-2026 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 /* maximum length of radio debugfs directory name */
38 #define RADIO_DEBUGFSDIR_MAX_LEN 8
39
40 MODULE_AUTHOR("Johannes Berg");
41 MODULE_LICENSE("GPL");
42 MODULE_DESCRIPTION("wireless configuration support");
43 MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME);
44
45 /* RCU-protected (and RTNL for writers) */
46 LIST_HEAD(cfg80211_rdev_list);
47 int cfg80211_rdev_list_generation;
48
49 /* for debugfs */
50 static struct dentry *ieee80211_debugfs_dir;
51
52 /* for the cleanup, scan and event works */
53 struct workqueue_struct *cfg80211_wq;
54
55 static bool cfg80211_disable_40mhz_24ghz;
56 module_param(cfg80211_disable_40mhz_24ghz, bool, 0644);
57 MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz,
58 "Disable 40MHz support in the 2.4GHz band");
59
cfg80211_rdev_by_wiphy_idx(int wiphy_idx)60 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
61 {
62 struct cfg80211_registered_device *result = NULL, *rdev;
63
64 ASSERT_RTNL();
65
66 for_each_rdev(rdev) {
67 if (rdev->wiphy_idx == wiphy_idx) {
68 result = rdev;
69 break;
70 }
71 }
72
73 return result;
74 }
75
get_wiphy_idx(struct wiphy * wiphy)76 int get_wiphy_idx(struct wiphy *wiphy)
77 {
78 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
79
80 return rdev->wiphy_idx;
81 }
82
wiphy_idx_to_wiphy(int wiphy_idx)83 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
84 {
85 struct cfg80211_registered_device *rdev;
86
87 ASSERT_RTNL();
88
89 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
90 if (!rdev)
91 return NULL;
92 return &rdev->wiphy;
93 }
94
cfg80211_dev_check_name(struct cfg80211_registered_device * rdev,const char * newname)95 static int cfg80211_dev_check_name(struct cfg80211_registered_device *rdev,
96 const char *newname)
97 {
98 struct cfg80211_registered_device *rdev2;
99 int wiphy_idx, taken = -1, digits;
100
101 ASSERT_RTNL();
102
103 if (strlen(newname) > NL80211_WIPHY_NAME_MAXLEN)
104 return -EINVAL;
105
106 /* prohibit calling the thing phy%d when %d is not its number */
107 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
108 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
109 /* count number of places needed to print wiphy_idx */
110 digits = 1;
111 while (wiphy_idx /= 10)
112 digits++;
113 /*
114 * deny the name if it is phy<idx> where <idx> is printed
115 * without leading zeroes. taken == strlen(newname) here
116 */
117 if (taken == strlen(PHY_NAME) + digits)
118 return -EINVAL;
119 }
120
121 /* Ensure another device does not already have this name. */
122 for_each_rdev(rdev2)
123 if (strcmp(newname, wiphy_name(&rdev2->wiphy)) == 0)
124 return -EINVAL;
125
126 return 0;
127 }
128
cfg80211_dev_rename(struct cfg80211_registered_device * rdev,char * newname)129 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
130 char *newname)
131 {
132 int result;
133
134 ASSERT_RTNL();
135 lockdep_assert_wiphy(&rdev->wiphy);
136
137 /* Ignore nop renames */
138 if (strcmp(newname, wiphy_name(&rdev->wiphy)) == 0)
139 return 0;
140
141 result = cfg80211_dev_check_name(rdev, newname);
142 if (result < 0)
143 return result;
144
145 result = device_rename(&rdev->wiphy.dev, newname);
146 if (result)
147 return result;
148
149 debugfs_change_name(rdev->wiphy.debugfsdir, "%s", newname);
150
151 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
152
153 return 0;
154 }
155
cfg80211_switch_netns(struct cfg80211_registered_device * rdev,struct net * net)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->netns_immutable = false;
169 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
170 if (err)
171 break;
172 wdev->netdev->netns_immutable = true;
173 }
174
175 if (err) {
176 /* failed -- clean up to old netns */
177 net = wiphy_net(&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->netns_immutable = false;
185 err = dev_change_net_namespace(wdev->netdev, net,
186 "wlan%d");
187 WARN_ON(err);
188 wdev->netdev->netns_immutable = true;
189 }
190
191 return err;
192 }
193
194 guard(wiphy)(&rdev->wiphy);
195
196 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
197 if (!wdev->netdev)
198 continue;
199 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE);
200 }
201
202 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
203
204 wiphy_net_set(&rdev->wiphy, net);
205
206 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev));
207 WARN_ON(err);
208
209 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
210
211 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
212 if (!wdev->netdev)
213 continue;
214 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
215 }
216
217 return 0;
218 }
219
cfg80211_rfkill_poll(struct rfkill * rfkill,void * data)220 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
221 {
222 struct cfg80211_registered_device *rdev = data;
223
224 guard(wiphy)(&rdev->wiphy);
225
226 rdev_rfkill_poll(rdev);
227 }
228
cfg80211_stop_p2p_device(struct cfg80211_registered_device * rdev,struct wireless_dev * wdev)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 cfg80211_pmsr_wdev_down(wdev);
241 rdev_stop_p2p_device(rdev, wdev);
242 wdev->is_running = false;
243
244 rdev->opencount--;
245
246 if (rdev->scan_req && rdev->scan_req->req.wdev == wdev) {
247 if (WARN_ON(!rdev->scan_req->notified &&
248 (!rdev->int_scan_req ||
249 !rdev->int_scan_req->notified)))
250 rdev->scan_req->info.aborted = true;
251 ___cfg80211_scan_done(rdev, false);
252 }
253 }
254
cfg80211_stop_nan(struct cfg80211_registered_device * rdev,struct wireless_dev * wdev)255 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev,
256 struct wireless_dev *wdev)
257 {
258 struct cfg80211_nan_local_sched empty_sched = {};
259
260 lockdep_assert_held(&rdev->wiphy.mtx);
261
262 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_NAN))
263 return;
264
265 if (!wdev_running(wdev))
266 return;
267
268 cfg80211_pmsr_wdev_down(wdev);
269
270 /*
271 * If there is a scheduled update pending, mark it as canceled, so the
272 * empty schedule will be accepted
273 */
274 wdev->u.nan.sched_update_pending = false;
275
276 /* Unschedule all */
277 cfg80211_nan_set_local_schedule(rdev, wdev, &empty_sched);
278
279 rdev_stop_nan(rdev, wdev);
280 wdev->is_running = false;
281
282 eth_zero_addr(wdev->u.nan.cluster_id);
283
284 rdev->opencount--;
285 }
286
cfg80211_nan_set_local_schedule(struct cfg80211_registered_device * rdev,struct wireless_dev * wdev,struct cfg80211_nan_local_sched * sched)287 int cfg80211_nan_set_local_schedule(struct cfg80211_registered_device *rdev,
288 struct wireless_dev *wdev,
289 struct cfg80211_nan_local_sched *sched)
290 {
291 int ret;
292
293 lockdep_assert_held(&rdev->wiphy.mtx);
294
295 if (wdev->iftype != NL80211_IFTYPE_NAN || !wdev_running(wdev))
296 return -EINVAL;
297
298 if (wdev->u.nan.sched_update_pending)
299 return -EBUSY;
300
301 ret = rdev_nan_set_local_sched(rdev, wdev, sched);
302 if (ret)
303 return ret;
304
305 wdev->u.nan.sched_update_pending = sched->deferred;
306
307 kfree(wdev->u.nan.chandefs);
308 wdev->u.nan.chandefs = NULL;
309 wdev->u.nan.n_channels = 0;
310
311 if (!sched->n_channels)
312 return 0;
313
314 wdev->u.nan.chandefs = kzalloc_objs(*wdev->u.nan.chandefs,
315 sched->n_channels);
316 if (!wdev->u.nan.chandefs)
317 return -ENOMEM;
318
319 for (int i = 0; i < sched->n_channels; i++)
320 wdev->u.nan.chandefs[i] = sched->nan_channels[i].chandef;
321
322 wdev->u.nan.n_channels = sched->n_channels;
323
324 return 0;
325 }
326
cfg80211_stop_pd(struct cfg80211_registered_device * rdev,struct wireless_dev * wdev)327 void cfg80211_stop_pd(struct cfg80211_registered_device *rdev,
328 struct wireless_dev *wdev)
329 {
330 lockdep_assert_held(&rdev->wiphy.mtx);
331
332 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_PD))
333 return;
334
335 if (!rdev->ops->stop_pd)
336 return;
337
338 if (!wdev_running(wdev))
339 return;
340
341 cfg80211_pmsr_wdev_down(wdev);
342
343 rdev_stop_pd(rdev, wdev);
344 wdev->is_running = false;
345
346 rdev->opencount--;
347 }
348
cfg80211_shutdown_all_interfaces(struct wiphy * wiphy)349 void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy)
350 {
351 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
352 struct wireless_dev *wdev;
353
354 ASSERT_RTNL();
355
356 /*
357 * Some netdev interfaces need to be closed before some non-netdev
358 * ones, i.e. NAN_DATA interfaces need to be closed before the NAN
359 * interface
360 */
361 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
362 if (wdev->netdev) {
363 dev_close(wdev->netdev);
364 continue;
365 }
366 }
367
368 guard(wiphy)(wiphy);
369
370 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
371 switch (wdev->iftype) {
372 case NL80211_IFTYPE_P2P_DEVICE:
373 cfg80211_stop_p2p_device(rdev, wdev);
374 break;
375 case NL80211_IFTYPE_NAN:
376 cfg80211_stop_nan(rdev, wdev);
377 break;
378 case NL80211_IFTYPE_PD:
379 cfg80211_stop_pd(rdev, wdev);
380 break;
381 default:
382 break;
383 }
384 }
385 }
386 EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces);
387
cfg80211_rfkill_set_block(void * data,bool blocked)388 static int cfg80211_rfkill_set_block(void *data, bool blocked)
389 {
390 struct cfg80211_registered_device *rdev = data;
391
392 if (!blocked)
393 return 0;
394
395 rtnl_lock();
396 cfg80211_shutdown_all_interfaces(&rdev->wiphy);
397 rtnl_unlock();
398
399 return 0;
400 }
401
cfg80211_rfkill_block_work(struct work_struct * work)402 static void cfg80211_rfkill_block_work(struct work_struct *work)
403 {
404 struct cfg80211_registered_device *rdev;
405
406 rdev = container_of(work, struct cfg80211_registered_device,
407 rfkill_block);
408 cfg80211_rfkill_set_block(rdev, true);
409 }
410
cfg80211_event_work(struct work_struct * work)411 static void cfg80211_event_work(struct work_struct *work)
412 {
413 struct cfg80211_registered_device *rdev;
414
415 rdev = container_of(work, struct cfg80211_registered_device,
416 event_work);
417
418 guard(wiphy)(&rdev->wiphy);
419
420 cfg80211_process_rdev_events(rdev);
421 }
422
cfg80211_destroy_ifaces(struct cfg80211_registered_device * rdev)423 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev)
424 {
425 struct wireless_dev *wdev, *tmp;
426
427 ASSERT_RTNL();
428
429 list_for_each_entry_safe(wdev, tmp, &rdev->wiphy.wdev_list, list) {
430 if (wdev->nl_owner_dead) {
431 cfg80211_close_dependents(rdev, wdev);
432
433 if (wdev->netdev)
434 dev_close(wdev->netdev);
435
436 guard(wiphy)(&rdev->wiphy);
437
438 cfg80211_remove_virtual_intf(rdev, wdev);
439 }
440 }
441 }
442
cfg80211_close_dependents(struct cfg80211_registered_device * rdev,struct wireless_dev * wdev)443 void cfg80211_close_dependents(struct cfg80211_registered_device *rdev,
444 struct wireless_dev *wdev)
445 {
446 ASSERT_RTNL();
447
448 if (wdev->iftype != NL80211_IFTYPE_NAN)
449 return;
450
451 /* Close all NAN DATA interfaces */
452 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
453 if (wdev->iftype == NL80211_IFTYPE_NAN_DATA)
454 dev_close(wdev->netdev);
455 }
456 }
457
cfg80211_destroy_iface_wk(struct work_struct * work)458 static void cfg80211_destroy_iface_wk(struct work_struct *work)
459 {
460 struct cfg80211_registered_device *rdev;
461
462 rdev = container_of(work, struct cfg80211_registered_device,
463 destroy_work);
464
465 rtnl_lock();
466 cfg80211_destroy_ifaces(rdev);
467 rtnl_unlock();
468 }
469
cfg80211_sched_scan_stop_wk(struct wiphy * wiphy,struct wiphy_work * work)470 static void cfg80211_sched_scan_stop_wk(struct wiphy *wiphy,
471 struct wiphy_work *work)
472 {
473 struct cfg80211_registered_device *rdev;
474 struct cfg80211_sched_scan_request *req, *tmp;
475
476 rdev = container_of(work, struct cfg80211_registered_device,
477 sched_scan_stop_wk);
478
479 list_for_each_entry_safe(req, tmp, &rdev->sched_scan_req_list, list) {
480 if (req->nl_owner_dead)
481 cfg80211_stop_sched_scan_req(rdev, req, false);
482 }
483 }
484
cfg80211_propagate_radar_detect_wk(struct work_struct * work)485 static void cfg80211_propagate_radar_detect_wk(struct work_struct *work)
486 {
487 struct cfg80211_registered_device *rdev;
488
489 rdev = container_of(work, struct cfg80211_registered_device,
490 propagate_radar_detect_wk);
491
492 rtnl_lock();
493
494 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->radar_chandef,
495 NL80211_DFS_UNAVAILABLE,
496 NL80211_RADAR_DETECTED);
497
498 rtnl_unlock();
499 }
500
cfg80211_propagate_cac_done_wk(struct work_struct * work)501 static void cfg80211_propagate_cac_done_wk(struct work_struct *work)
502 {
503 struct cfg80211_registered_device *rdev;
504
505 rdev = container_of(work, struct cfg80211_registered_device,
506 propagate_cac_done_wk);
507
508 rtnl_lock();
509
510 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->cac_done_chandef,
511 NL80211_DFS_AVAILABLE,
512 NL80211_RADAR_CAC_FINISHED);
513
514 rtnl_unlock();
515 }
516
cfg80211_wiphy_work(struct work_struct * work)517 static void cfg80211_wiphy_work(struct work_struct *work)
518 {
519 struct cfg80211_registered_device *rdev;
520 struct wiphy_work *wk;
521
522 rdev = container_of(work, struct cfg80211_registered_device, wiphy_work);
523
524 trace_wiphy_work_worker_start(&rdev->wiphy);
525
526 guard(wiphy)(&rdev->wiphy);
527 if (rdev->suspended)
528 return;
529
530 spin_lock_irq(&rdev->wiphy_work_lock);
531 wk = list_first_entry_or_null(&rdev->wiphy_work_list,
532 struct wiphy_work, entry);
533 if (wk) {
534 list_del_init(&wk->entry);
535 if (!list_empty(&rdev->wiphy_work_list))
536 queue_work(system_dfl_wq, work);
537 spin_unlock_irq(&rdev->wiphy_work_lock);
538
539 trace_wiphy_work_run(&rdev->wiphy, wk);
540 wk->func(&rdev->wiphy, wk);
541 } else {
542 spin_unlock_irq(&rdev->wiphy_work_lock);
543 }
544 }
545
546 /* exported functions */
547
wiphy_new_nm(const struct cfg80211_ops * ops,int sizeof_priv,const char * requested_name)548 struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv,
549 const char *requested_name)
550 {
551 static atomic_t wiphy_counter = ATOMIC_INIT(0);
552
553 struct cfg80211_registered_device *rdev;
554 int alloc_size;
555
556 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
557 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
558 WARN_ON(ops->connect && !ops->disconnect);
559 WARN_ON(ops->join_ibss && !ops->leave_ibss);
560 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
561 WARN_ON(ops->add_station && !ops->del_station);
562 WARN_ON(ops->add_mpath && !ops->del_mpath);
563 WARN_ON(ops->join_mesh && !ops->leave_mesh);
564 WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device);
565 WARN_ON(ops->start_ap && !ops->stop_ap);
566 WARN_ON(ops->join_ocb && !ops->leave_ocb);
567 WARN_ON(ops->suspend && !ops->resume);
568 WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop);
569 WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel);
570 WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch);
571 WARN_ON(ops->add_tx_ts && !ops->del_tx_ts);
572
573 alloc_size = sizeof(*rdev) + sizeof_priv;
574
575 rdev = kzalloc(alloc_size, GFP_KERNEL);
576 if (!rdev)
577 return NULL;
578
579 rdev->ops = ops;
580
581 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter);
582
583 if (unlikely(rdev->wiphy_idx < 0)) {
584 /* ugh, wrapped! */
585 atomic_dec(&wiphy_counter);
586 kfree(rdev);
587 return NULL;
588 }
589
590 /* atomic_inc_return makes it start at 1, make it start at 0 */
591 rdev->wiphy_idx--;
592
593 /* give it a proper name */
594 if (requested_name && requested_name[0]) {
595 int rv;
596
597 rtnl_lock();
598 rv = cfg80211_dev_check_name(rdev, requested_name);
599
600 if (rv < 0) {
601 rtnl_unlock();
602 goto use_default_name;
603 }
604
605 rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name);
606 rtnl_unlock();
607 if (rv)
608 goto use_default_name;
609 } else {
610 int rv;
611
612 use_default_name:
613 /* NOTE: This is *probably* safe w/out holding rtnl because of
614 * the restrictions on phy names. Probably this call could
615 * fail if some other part of the kernel (re)named a device
616 * phyX. But, might should add some locking and check return
617 * value, and use a different name if this one exists?
618 */
619 rv = dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
620 if (rv < 0) {
621 kfree(rdev);
622 return NULL;
623 }
624 }
625
626 mutex_init(&rdev->wiphy.mtx);
627 INIT_LIST_HEAD(&rdev->wiphy.wdev_list);
628 INIT_LIST_HEAD(&rdev->beacon_registrations);
629 spin_lock_init(&rdev->beacon_registrations_lock);
630 spin_lock_init(&rdev->bss_lock);
631 INIT_LIST_HEAD(&rdev->bss_list);
632 INIT_LIST_HEAD(&rdev->sched_scan_req_list);
633 wiphy_work_init(&rdev->scan_done_wk, __cfg80211_scan_done);
634 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk,
635 cfg80211_dfs_channels_update_work);
636 #ifdef CONFIG_CFG80211_WEXT
637 rdev->wiphy.wext = &cfg80211_wext_handler;
638 #endif
639
640 device_initialize(&rdev->wiphy.dev);
641 rdev->wiphy.dev.class = &ieee80211_class;
642 rdev->wiphy.dev.platform_data = rdev;
643 device_enable_async_suspend(&rdev->wiphy.dev);
644
645 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk);
646 wiphy_work_init(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk);
647 INIT_WORK(&rdev->sched_scan_res_wk, cfg80211_sched_scan_results_wk);
648 INIT_WORK(&rdev->propagate_radar_detect_wk,
649 cfg80211_propagate_radar_detect_wk);
650 INIT_WORK(&rdev->propagate_cac_done_wk, cfg80211_propagate_cac_done_wk);
651 INIT_WORK(&rdev->mgmt_registrations_update_wk,
652 cfg80211_mgmt_registrations_update_wk);
653 spin_lock_init(&rdev->mgmt_registrations_lock);
654 INIT_WORK(&rdev->wiphy_work, cfg80211_wiphy_work);
655 INIT_LIST_HEAD(&rdev->wiphy_work_list);
656 spin_lock_init(&rdev->wiphy_work_lock);
657
658 #ifdef CONFIG_CFG80211_DEFAULT_PS
659 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
660 #endif
661
662 wiphy_net_set(&rdev->wiphy, &init_net);
663
664 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
665 rdev->wiphy.rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
666 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
667 &rdev->rfkill_ops, rdev);
668
669 if (!rdev->wiphy.rfkill) {
670 wiphy_free(&rdev->wiphy);
671 return NULL;
672 }
673
674 INIT_WORK(&rdev->rfkill_block, cfg80211_rfkill_block_work);
675 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
676 INIT_WORK(&rdev->event_work, cfg80211_event_work);
677 INIT_WORK(&rdev->background_cac_abort_wk,
678 cfg80211_background_cac_abort_wk);
679 INIT_DELAYED_WORK(&rdev->background_cac_done_wk,
680 cfg80211_background_cac_done_wk);
681
682 init_waitqueue_head(&rdev->dev_wait);
683
684 /*
685 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
686 * Fragmentation and RTS threshold are disabled by default with the
687 * special -1 value.
688 */
689 rdev->wiphy.retry_short = 7;
690 rdev->wiphy.retry_long = 4;
691 rdev->wiphy.frag_threshold = (u32) -1;
692 rdev->wiphy.rts_threshold = (u32) -1;
693 rdev->wiphy.coverage_class = 0;
694
695 rdev->wiphy.max_num_csa_counters = 1;
696
697 rdev->wiphy.max_sched_scan_plans = 1;
698 rdev->wiphy.max_sched_scan_plan_interval = U32_MAX;
699
700 return &rdev->wiphy;
701 }
702 EXPORT_SYMBOL(wiphy_new_nm);
703
704 static
wiphy_verify_iface_combinations(struct wiphy * wiphy,const struct ieee80211_iface_combination * iface_comb,int n_iface_comb,bool combined_radio)705 int wiphy_verify_iface_combinations(struct wiphy *wiphy,
706 const struct ieee80211_iface_combination *iface_comb,
707 int n_iface_comb,
708 bool combined_radio)
709 {
710 const struct ieee80211_iface_combination *c;
711 int i, j;
712
713 for (i = 0; i < n_iface_comb; i++) {
714 u32 cnt = 0;
715 u16 all_iftypes = 0;
716
717 c = &iface_comb[i];
718
719 /*
720 * Combinations with just one interface aren't real,
721 * however we make an exception for DFS.
722 */
723 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths))
724 return -EINVAL;
725
726 /* Need at least one channel */
727 if (WARN_ON(!c->num_different_channels))
728 return -EINVAL;
729
730 /* DFS only works on one channel. Avoid this check
731 * for multi-radio global combination, since it hold
732 * the capabilities of all radio combinations.
733 */
734 if (!combined_radio &&
735 WARN_ON(c->radar_detect_widths &&
736 c->num_different_channels > 1))
737 return -EINVAL;
738
739 if (WARN_ON(!c->n_limits))
740 return -EINVAL;
741
742 for (j = 0; j < c->n_limits; j++) {
743 u16 types = c->limits[j].types;
744
745 /* interface types shouldn't overlap */
746 if (WARN_ON(types & all_iftypes))
747 return -EINVAL;
748 all_iftypes |= types;
749
750 if (WARN_ON(!c->limits[j].max))
751 return -EINVAL;
752
753 /* Shouldn't list software iftypes in combinations! */
754 if (WARN_ON(wiphy->software_iftypes & types))
755 return -EINVAL;
756
757 /* Only a single P2P_DEVICE can be allowed, avoid this
758 * check for multi-radio global combination, since it
759 * hold the capabilities of all radio combinations.
760 */
761 if (!combined_radio &&
762 WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) &&
763 c->limits[j].max > 1))
764 return -EINVAL;
765
766 /* Only a single NAN can be allowed */
767 if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) &&
768 c->limits[j].max > 1))
769 return -EINVAL;
770
771 /*
772 * This isn't well-defined right now. If you have an
773 * IBSS interface, then its beacon interval may change
774 * by joining other networks, and nothing prevents it
775 * from doing that.
776 * So technically we probably shouldn't even allow AP
777 * and IBSS in the same interface, but it seems that
778 * some drivers support that, possibly only with fixed
779 * beacon intervals for IBSS.
780 */
781 if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) &&
782 c->beacon_int_min_gcd)) {
783 return -EINVAL;
784 }
785
786 cnt += c->limits[j].max;
787 /*
788 * Don't advertise an unsupported type
789 * in a combination.
790 */
791 if (WARN_ON((wiphy->interface_modes & types) != types))
792 return -EINVAL;
793 }
794
795 if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS)))
796 return -EINVAL;
797
798 /* You can't even choose that many! */
799 if (WARN_ON(cnt < c->max_interfaces))
800 return -EINVAL;
801 }
802
803 return 0;
804 }
805
wiphy_verify_combinations(struct wiphy * wiphy)806 static int wiphy_verify_combinations(struct wiphy *wiphy)
807 {
808 int i, ret;
809 bool combined_radio = false;
810
811 if (wiphy->n_radio) {
812 for (i = 0; i < wiphy->n_radio; i++) {
813 const struct wiphy_radio *radio = &wiphy->radio[i];
814
815 ret = wiphy_verify_iface_combinations(wiphy,
816 radio->iface_combinations,
817 radio->n_iface_combinations,
818 false);
819 if (ret)
820 return ret;
821 }
822
823 combined_radio = true;
824 }
825
826 ret = wiphy_verify_iface_combinations(wiphy,
827 wiphy->iface_combinations,
828 wiphy->n_iface_combinations,
829 combined_radio);
830
831 return ret;
832 }
833
wiphy_cipher_suites_valid(const struct wiphy * wiphy)834 static bool wiphy_cipher_suites_valid(const struct wiphy *wiphy)
835 {
836 int i, j;
837
838 if (wiphy->n_cipher_suites && !wiphy->cipher_suites)
839 return false;
840
841 for (i = 0; i < wiphy->n_cipher_suites; i++) {
842 for (j = 0; j < i; j++) {
843 if (wiphy->cipher_suites[i] ==
844 wiphy->cipher_suites[j])
845 return false;
846 }
847 }
848
849 return true;
850 }
851
wiphy_register(struct wiphy * wiphy)852 int wiphy_register(struct wiphy *wiphy)
853 {
854 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
855 int res;
856 enum nl80211_band band;
857 struct ieee80211_supported_band *sband;
858 bool have_band = false;
859 int i;
860 u16 ifmodes = wiphy->interface_modes;
861
862 #ifdef CONFIG_PM
863 if (WARN_ON(wiphy->wowlan &&
864 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
865 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
866 return -EINVAL;
867 if (WARN_ON(wiphy->wowlan &&
868 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns &&
869 !wiphy->wowlan->tcp))
870 return -EINVAL;
871 #endif
872 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
873 (!rdev->ops->tdls_channel_switch ||
874 !rdev->ops->tdls_cancel_channel_switch)))
875 return -EINVAL;
876 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_PD)) &&
877 (!rdev->ops->start_pd || !rdev->ops->stop_pd)))
878 return -EINVAL;
879
880 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) &&
881 (!rdev->ops->start_nan || !rdev->ops->stop_nan ||
882 !rdev->ops->add_nan_func || !rdev->ops->del_nan_func ||
883 !(wiphy->nan_supported_bands & BIT(NL80211_BAND_2GHZ)))))
884 return -EINVAL;
885
886 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN_DATA)) &&
887 (!wiphy->nan_capa.phy.ht.ht_supported || wiphy->n_radio > 1)))
888 return -EINVAL;
889
890 if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)))
891 return -EINVAL;
892
893 if (WARN_ON(wiphy->pmsr_capa && !wiphy->pmsr_capa->ftm.supported))
894 return -EINVAL;
895
896 if (wiphy->pmsr_capa && wiphy->pmsr_capa->ftm.supported) {
897 if (WARN_ON(!wiphy->pmsr_capa->ftm.asap &&
898 !wiphy->pmsr_capa->ftm.non_asap))
899 return -EINVAL;
900 if (WARN_ON(!wiphy->pmsr_capa->ftm.preambles ||
901 !wiphy->pmsr_capa->ftm.bandwidths))
902 return -EINVAL;
903 if (WARN_ON(wiphy->pmsr_capa->ftm.preambles &
904 ~(BIT(NL80211_PREAMBLE_LEGACY) |
905 BIT(NL80211_PREAMBLE_HT) |
906 BIT(NL80211_PREAMBLE_VHT) |
907 BIT(NL80211_PREAMBLE_HE) |
908 BIT(NL80211_PREAMBLE_DMG))))
909 return -EINVAL;
910 if (WARN_ON((wiphy->pmsr_capa->ftm.trigger_based ||
911 wiphy->pmsr_capa->ftm.non_trigger_based) &&
912 !(wiphy->pmsr_capa->ftm.preambles &
913 BIT(NL80211_PREAMBLE_HE))))
914 return -EINVAL;
915 if (WARN_ON(wiphy->pmsr_capa->ftm.bandwidths &
916 ~(BIT(NL80211_CHAN_WIDTH_20_NOHT) |
917 BIT(NL80211_CHAN_WIDTH_20) |
918 BIT(NL80211_CHAN_WIDTH_40) |
919 BIT(NL80211_CHAN_WIDTH_80) |
920 BIT(NL80211_CHAN_WIDTH_80P80) |
921 BIT(NL80211_CHAN_WIDTH_160) |
922 BIT(NL80211_CHAN_WIDTH_320))))
923 return -EINVAL;
924 }
925
926 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) &&
927 (wiphy->regulatory_flags &
928 (REGULATORY_CUSTOM_REG |
929 REGULATORY_STRICT_REG |
930 REGULATORY_COUNTRY_IE_FOLLOW_POWER |
931 REGULATORY_COUNTRY_IE_IGNORE))))
932 return -EINVAL;
933
934 if (WARN_ON(wiphy->coalesce &&
935 (!wiphy->coalesce->n_rules ||
936 !wiphy->coalesce->n_patterns) &&
937 (!wiphy->coalesce->pattern_min_len ||
938 wiphy->coalesce->pattern_min_len >
939 wiphy->coalesce->pattern_max_len)))
940 return -EINVAL;
941
942 if (WARN_ON(wiphy->ap_sme_capa &&
943 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
944 return -EINVAL;
945
946 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
947 return -EINVAL;
948
949 if (WARN_ON(wiphy->addresses &&
950 !is_zero_ether_addr(wiphy->perm_addr) &&
951 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
952 ETH_ALEN)))
953 return -EINVAL;
954
955 if (WARN_ON(wiphy->max_acl_mac_addrs &&
956 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) ||
957 !rdev->ops->set_mac_acl)))
958 return -EINVAL;
959
960 /* assure only valid behaviours are flagged by driver
961 * hence subtract 2 as bit 0 is invalid.
962 */
963 if (WARN_ON(wiphy->bss_select_support &&
964 (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2))))
965 return -EINVAL;
966
967 if (WARN_ON(wiphy_ext_feature_isset(&rdev->wiphy,
968 NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X) &&
969 (!rdev->ops->set_pmk || !rdev->ops->del_pmk)))
970 return -EINVAL;
971
972 if (WARN_ON(!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
973 rdev->ops->update_connect_params))
974 return -EINVAL;
975
976 if (wiphy->addresses)
977 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
978
979 /* sanity check ifmodes */
980 WARN_ON(!ifmodes);
981 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
982 if (WARN_ON(ifmodes != wiphy->interface_modes))
983 wiphy->interface_modes = ifmodes;
984
985 res = wiphy_verify_combinations(wiphy);
986 if (res)
987 return res;
988
989 if (!wiphy_cipher_suites_valid(wiphy))
990 return -EINVAL;
991
992 /* sanity check supported bands/channels */
993 for (band = 0; band < NUM_NL80211_BANDS; band++) {
994 const struct ieee80211_sband_iftype_data *iftd;
995 u16 types = 0;
996 bool have_he = false;
997
998 sband = wiphy->bands[band];
999 if (!sband)
1000 continue;
1001
1002 sband->band = band;
1003 if (WARN_ON(!sband->n_channels))
1004 return -EINVAL;
1005 /*
1006 * on 60GHz or sub-1Ghz band, there are no legacy rates, so
1007 * n_bitrates is 0
1008 */
1009 if (WARN_ON((band != NL80211_BAND_60GHZ &&
1010 band != NL80211_BAND_S1GHZ) &&
1011 !sband->n_bitrates))
1012 return -EINVAL;
1013
1014 if (WARN_ON(band == NL80211_BAND_6GHZ &&
1015 (sband->ht_cap.ht_supported ||
1016 sband->vht_cap.vht_supported)))
1017 return -EINVAL;
1018
1019 /*
1020 * Since cfg80211_disable_40mhz_24ghz is global, we can
1021 * modify the sband's ht data even if the driver uses a
1022 * global structure for that.
1023 */
1024 if (cfg80211_disable_40mhz_24ghz &&
1025 band == NL80211_BAND_2GHZ &&
1026 sband->ht_cap.ht_supported) {
1027 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
1028 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
1029 }
1030
1031 /*
1032 * Since we use a u32 for rate bitmaps in
1033 * ieee80211_get_response_rate, we cannot
1034 * have more than 32 legacy rates.
1035 */
1036 if (WARN_ON(sband->n_bitrates > 32))
1037 return -EINVAL;
1038
1039 for (i = 0; i < sband->n_channels; i++) {
1040 sband->channels[i].orig_flags =
1041 sband->channels[i].flags;
1042 sband->channels[i].orig_mag = INT_MAX;
1043 sband->channels[i].orig_mpwr =
1044 sband->channels[i].max_power;
1045 sband->channels[i].band = band;
1046
1047 if (WARN_ON(sband->channels[i].freq_offset >= 1000))
1048 return -EINVAL;
1049 }
1050
1051 for_each_sband_iftype_data(sband, i, iftd) {
1052 bool has_ap, has_non_ap;
1053 u32 ap_bits = BIT(NL80211_IFTYPE_AP) |
1054 BIT(NL80211_IFTYPE_P2P_GO);
1055
1056 if (WARN_ON(!iftd->types_mask))
1057 return -EINVAL;
1058 if (WARN_ON(types & iftd->types_mask))
1059 return -EINVAL;
1060
1061 /* at least one piece of information must be present */
1062 if (WARN_ON(!iftd->he_cap.has_he))
1063 return -EINVAL;
1064
1065 types |= iftd->types_mask;
1066
1067 if (i == 0)
1068 have_he = iftd->he_cap.has_he;
1069 else
1070 have_he = have_he &&
1071 iftd->he_cap.has_he;
1072
1073 has_ap = iftd->types_mask & ap_bits;
1074 has_non_ap = iftd->types_mask & ~ap_bits;
1075
1076 /*
1077 * For EHT 20 MHz STA, the capabilities format differs
1078 * but to simplify, don't check 20 MHz but rather check
1079 * only if AP and non-AP were mentioned at the same time,
1080 * reject if so.
1081 */
1082 if (WARN_ON(iftd->eht_cap.has_eht &&
1083 has_ap && has_non_ap))
1084 return -EINVAL;
1085 }
1086
1087 if (WARN_ON(!have_he && band == NL80211_BAND_6GHZ))
1088 return -EINVAL;
1089
1090 have_band = true;
1091 }
1092
1093 if (!have_band) {
1094 WARN_ON(1);
1095 return -EINVAL;
1096 }
1097
1098 for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
1099 /*
1100 * Validate we have a policy (can be explicitly set to
1101 * VENDOR_CMD_RAW_DATA which is non-NULL) and also that
1102 * we have at least one of doit/dumpit.
1103 */
1104 if (WARN_ON(!rdev->wiphy.vendor_commands[i].policy))
1105 return -EINVAL;
1106 if (WARN_ON(!rdev->wiphy.vendor_commands[i].doit &&
1107 !rdev->wiphy.vendor_commands[i].dumpit))
1108 return -EINVAL;
1109 }
1110
1111 #ifdef CONFIG_PM
1112 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns &&
1113 (!rdev->wiphy.wowlan->pattern_min_len ||
1114 rdev->wiphy.wowlan->pattern_min_len >
1115 rdev->wiphy.wowlan->pattern_max_len)))
1116 return -EINVAL;
1117 #endif
1118
1119 if (!wiphy->max_num_akm_suites)
1120 wiphy->max_num_akm_suites = NL80211_MAX_NR_AKM_SUITES;
1121 else if (wiphy->max_num_akm_suites < NL80211_MAX_NR_AKM_SUITES ||
1122 wiphy->max_num_akm_suites > CFG80211_MAX_NUM_AKM_SUITES)
1123 return -EINVAL;
1124
1125 /* Allocate radio configuration space for multi-radio wiphy */
1126 if (wiphy->n_radio > 0) {
1127 int idx;
1128
1129 wiphy->radio_cfg = kzalloc_objs(*wiphy->radio_cfg,
1130 wiphy->n_radio);
1131 if (!wiphy->radio_cfg)
1132 return -ENOMEM;
1133 /*
1134 * Initialize wiphy radio parameters to IEEE 802.11
1135 * MIB default values. RTS threshold is disabled by
1136 * default with the special -1 value.
1137 */
1138 for (idx = 0; idx < wiphy->n_radio; idx++)
1139 wiphy->radio_cfg[idx].rts_threshold = (u32)-1;
1140 }
1141
1142 /* check and set up bitrates */
1143 ieee80211_set_bitrate_flags(wiphy);
1144
1145 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH;
1146
1147 if (rdev->wiphy.bss_param_support & WIPHY_BSS_PARAM_P2P_CTWINDOW)
1148 rdev->wiphy.features |= NL80211_FEATURE_P2P_GO_CTWIN;
1149 else if (rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN)
1150 rdev->wiphy.bss_param_support |= WIPHY_BSS_PARAM_P2P_CTWINDOW;
1151 if (rdev->wiphy.bss_param_support & WIPHY_BSS_PARAM_P2P_OPPPS)
1152 rdev->wiphy.features |= NL80211_FEATURE_P2P_GO_OPPPS;
1153 else if (rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS)
1154 rdev->wiphy.bss_param_support |= WIPHY_BSS_PARAM_P2P_OPPPS;
1155
1156 rtnl_lock();
1157 wiphy_lock(&rdev->wiphy);
1158 res = device_add(&rdev->wiphy.dev);
1159 if (res) {
1160 wiphy_unlock(&rdev->wiphy);
1161 rtnl_unlock();
1162 return res;
1163 }
1164
1165 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
1166 cfg80211_rdev_list_generation++;
1167
1168 /* add to debugfs */
1169 rdev->wiphy.debugfsdir = debugfs_create_dir(wiphy_name(&rdev->wiphy),
1170 ieee80211_debugfs_dir);
1171 if (wiphy->n_radio > 0) {
1172 int idx;
1173 char radio_name[RADIO_DEBUGFSDIR_MAX_LEN];
1174
1175 for (idx = 0; idx < wiphy->n_radio; idx++) {
1176 scnprintf(radio_name, sizeof(radio_name), "radio%d",
1177 idx);
1178 wiphy->radio_cfg[idx].radio_debugfsdir =
1179 debugfs_create_dir(radio_name,
1180 rdev->wiphy.debugfsdir);
1181 }
1182 }
1183
1184 cfg80211_debugfs_rdev_add(rdev);
1185 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
1186 wiphy_unlock(&rdev->wiphy);
1187
1188 /* set up regulatory info */
1189 wiphy_regulatory_register(wiphy);
1190
1191 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
1192 struct regulatory_request request = {
1193 .wiphy_idx = get_wiphy_idx(wiphy),
1194 .initiator = NL80211_REGDOM_SET_BY_DRIVER,
1195 .alpha2[0] = '9',
1196 .alpha2[1] = '9',
1197 };
1198
1199 nl80211_send_reg_change_event(&request);
1200 }
1201
1202 /* Check that nobody globally advertises any capabilities they do not
1203 * advertise on all possible interface types.
1204 */
1205 if (wiphy->extended_capabilities_len &&
1206 wiphy->num_iftype_ext_capab &&
1207 wiphy->iftype_ext_capab) {
1208 u8 supported_on_all, j;
1209 const struct wiphy_iftype_ext_capab *capab;
1210
1211 capab = wiphy->iftype_ext_capab;
1212 for (j = 0; j < wiphy->extended_capabilities_len; j++) {
1213 if (capab[0].extended_capabilities_len > j)
1214 supported_on_all =
1215 capab[0].extended_capabilities[j];
1216 else
1217 supported_on_all = 0x00;
1218 for (i = 1; i < wiphy->num_iftype_ext_capab; i++) {
1219 if (j >= capab[i].extended_capabilities_len) {
1220 supported_on_all = 0x00;
1221 break;
1222 }
1223 supported_on_all &=
1224 capab[i].extended_capabilities[j];
1225 }
1226 if (WARN_ON(wiphy->extended_capabilities[j] &
1227 ~supported_on_all))
1228 break;
1229 }
1230 }
1231
1232 rdev->wiphy.registered = true;
1233 rtnl_unlock();
1234
1235 res = rfkill_register(rdev->wiphy.rfkill);
1236 if (res) {
1237 rfkill_destroy(rdev->wiphy.rfkill);
1238 rdev->wiphy.rfkill = NULL;
1239 wiphy_unregister(&rdev->wiphy);
1240 return res;
1241 }
1242
1243 return 0;
1244 }
1245 EXPORT_SYMBOL(wiphy_register);
1246
wiphy_rfkill_start_polling(struct wiphy * wiphy)1247 void wiphy_rfkill_start_polling(struct wiphy *wiphy)
1248 {
1249 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1250
1251 if (!rdev->ops->rfkill_poll)
1252 return;
1253 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
1254 rfkill_resume_polling(wiphy->rfkill);
1255 }
1256 EXPORT_SYMBOL(wiphy_rfkill_start_polling);
1257
cfg80211_process_wiphy_works(struct cfg80211_registered_device * rdev,struct wiphy_work * end)1258 void cfg80211_process_wiphy_works(struct cfg80211_registered_device *rdev,
1259 struct wiphy_work *end)
1260 {
1261 unsigned int runaway_limit = 100;
1262 unsigned long flags;
1263
1264 lockdep_assert_held(&rdev->wiphy.mtx);
1265
1266 spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
1267 while (!list_empty(&rdev->wiphy_work_list)) {
1268 struct wiphy_work *wk;
1269
1270 wk = list_first_entry(&rdev->wiphy_work_list,
1271 struct wiphy_work, entry);
1272 list_del_init(&wk->entry);
1273 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
1274
1275 trace_wiphy_work_run(&rdev->wiphy, wk);
1276 wk->func(&rdev->wiphy, wk);
1277
1278 spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
1279
1280 if (wk == end)
1281 break;
1282
1283 if (WARN_ON(--runaway_limit == 0))
1284 INIT_LIST_HEAD(&rdev->wiphy_work_list);
1285 }
1286 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
1287 }
1288
wiphy_unregister(struct wiphy * wiphy)1289 void wiphy_unregister(struct wiphy *wiphy)
1290 {
1291 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1292
1293 wait_event(rdev->dev_wait, ({
1294 int __count;
1295 wiphy_lock(&rdev->wiphy);
1296 __count = rdev->opencount;
1297 wiphy_unlock(&rdev->wiphy);
1298 __count == 0; }));
1299
1300 if (rdev->wiphy.rfkill)
1301 rfkill_unregister(rdev->wiphy.rfkill);
1302
1303 rtnl_lock();
1304 wiphy_lock(&rdev->wiphy);
1305 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
1306 rdev->wiphy.registered = false;
1307
1308 WARN_ON(!list_empty(&rdev->wiphy.wdev_list));
1309
1310 /*
1311 * First remove the hardware from everywhere, this makes
1312 * it impossible to find from userspace.
1313 */
1314 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
1315 list_del_rcu(&rdev->list);
1316 synchronize_rcu();
1317
1318 /*
1319 * If this device got a regulatory hint tell core its
1320 * free to listen now to a new shiny device regulatory hint
1321 */
1322 wiphy_regulatory_deregister(wiphy);
1323
1324 cfg80211_rdev_list_generation++;
1325 device_del(&rdev->wiphy.dev);
1326
1327 #ifdef CONFIG_PM
1328 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
1329 rdev_set_wakeup(rdev, false);
1330 #endif
1331
1332 /* surely nothing is reachable now, clean up work */
1333 cfg80211_process_wiphy_works(rdev, NULL);
1334 wiphy_unlock(&rdev->wiphy);
1335 rtnl_unlock();
1336
1337 /* this has nothing to do now but make sure it's gone */
1338 cancel_work_sync(&rdev->wiphy_work);
1339
1340 cancel_work_sync(&rdev->sched_scan_res_wk);
1341 cancel_work_sync(&rdev->rfkill_block);
1342 cancel_work_sync(&rdev->conn_work);
1343 flush_work(&rdev->event_work);
1344 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
1345 cancel_delayed_work_sync(&rdev->background_cac_done_wk);
1346 flush_work(&rdev->destroy_work);
1347 flush_work(&rdev->propagate_radar_detect_wk);
1348 flush_work(&rdev->propagate_cac_done_wk);
1349 flush_work(&rdev->mgmt_registrations_update_wk);
1350 flush_work(&rdev->background_cac_abort_wk);
1351
1352 cfg80211_rdev_free_wowlan(rdev);
1353 cfg80211_free_coalesce(rdev->coalesce);
1354 rdev->coalesce = NULL;
1355 }
1356 EXPORT_SYMBOL(wiphy_unregister);
1357
cfg80211_dev_free(struct cfg80211_registered_device * rdev)1358 void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
1359 {
1360 struct cfg80211_internal_bss *scan, *tmp;
1361 struct cfg80211_beacon_registration *reg, *treg;
1362 unsigned long flags;
1363
1364 spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
1365 WARN_ON(!list_empty(&rdev->wiphy_work_list));
1366 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
1367 cancel_work_sync(&rdev->wiphy_work);
1368
1369 rfkill_destroy(rdev->wiphy.rfkill);
1370 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
1371 list_del(®->list);
1372 kfree(reg);
1373 }
1374 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
1375 cfg80211_put_bss(&rdev->wiphy, &scan->pub);
1376 mutex_destroy(&rdev->wiphy.mtx);
1377
1378 /*
1379 * The 'regd' can only be non-NULL if we never finished
1380 * initializing the wiphy and thus never went through the
1381 * unregister path - e.g. in failure scenarios. Thus, it
1382 * cannot have been visible to anyone if non-NULL, so we
1383 * can just free it here.
1384 */
1385 kfree(rcu_dereference_raw(rdev->wiphy.regd));
1386
1387 kfree(rdev);
1388 }
1389
wiphy_free(struct wiphy * wiphy)1390 void wiphy_free(struct wiphy *wiphy)
1391 {
1392 kfree(wiphy->radio_cfg);
1393 put_device(&wiphy->dev);
1394 }
1395 EXPORT_SYMBOL(wiphy_free);
1396
wiphy_rfkill_set_hw_state_reason(struct wiphy * wiphy,bool blocked,enum rfkill_hard_block_reasons reason)1397 void wiphy_rfkill_set_hw_state_reason(struct wiphy *wiphy, bool blocked,
1398 enum rfkill_hard_block_reasons reason)
1399 {
1400 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1401
1402 if (rfkill_set_hw_state_reason(wiphy->rfkill, blocked, reason))
1403 schedule_work(&rdev->rfkill_block);
1404 }
1405 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state_reason);
1406
_cfg80211_unregister_wdev(struct wireless_dev * wdev,bool unregister_netdev)1407 static void _cfg80211_unregister_wdev(struct wireless_dev *wdev,
1408 bool unregister_netdev)
1409 {
1410 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1411 struct cfg80211_cqm_config *cqm_config;
1412 unsigned int link_id;
1413
1414 ASSERT_RTNL();
1415 lockdep_assert_held(&rdev->wiphy.mtx);
1416
1417 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE);
1418
1419 wdev->registered = false;
1420
1421 if (wdev->netdev) {
1422 sysfs_remove_link(&wdev->netdev->dev.kobj, "phy80211");
1423 if (unregister_netdev)
1424 unregister_netdevice(wdev->netdev);
1425 }
1426
1427 list_del_rcu(&wdev->list);
1428 synchronize_net();
1429 rdev->devlist_generation++;
1430 wiphy_work_cancel(wdev->wiphy, &wdev->disconnect_wk);
1431
1432 cfg80211_mlme_purge_registrations(wdev);
1433
1434 switch (wdev->iftype) {
1435 case NL80211_IFTYPE_P2P_DEVICE:
1436 cfg80211_stop_p2p_device(rdev, wdev);
1437 break;
1438 case NL80211_IFTYPE_NAN:
1439 cfg80211_stop_nan(rdev, wdev);
1440 break;
1441 case NL80211_IFTYPE_PD:
1442 cfg80211_stop_pd(rdev, wdev);
1443 break;
1444 default:
1445 break;
1446 }
1447
1448 #ifdef CONFIG_CFG80211_WEXT
1449 kfree_sensitive(wdev->wext.keys);
1450 wdev->wext.keys = NULL;
1451 #endif
1452 wiphy_work_cancel(wdev->wiphy, &wdev->cqm_rssi_work);
1453 /* deleted from the list, so can't be found from nl80211 any more */
1454 cqm_config = rcu_access_pointer(wdev->cqm_config);
1455 kfree_rcu(cqm_config, rcu_head);
1456 RCU_INIT_POINTER(wdev->cqm_config, NULL);
1457
1458 /*
1459 * Ensure that all events have been processed and
1460 * freed.
1461 */
1462 cfg80211_process_wdev_events(wdev);
1463
1464 if (wdev->iftype == NL80211_IFTYPE_STATION ||
1465 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) {
1466 for (link_id = 0; link_id < ARRAY_SIZE(wdev->links); link_id++) {
1467 struct cfg80211_internal_bss *curbss;
1468
1469 curbss = wdev->links[link_id].client.current_bss;
1470
1471 if (WARN_ON(curbss)) {
1472 cfg80211_unhold_bss(curbss);
1473 cfg80211_put_bss(wdev->wiphy, &curbss->pub);
1474 wdev->links[link_id].client.current_bss = NULL;
1475 }
1476 }
1477 }
1478
1479 wdev->connected = false;
1480 }
1481
cfg80211_unregister_wdev(struct wireless_dev * wdev)1482 void cfg80211_unregister_wdev(struct wireless_dev *wdev)
1483 {
1484 _cfg80211_unregister_wdev(wdev, true);
1485 }
1486 EXPORT_SYMBOL(cfg80211_unregister_wdev);
1487
1488 static const struct device_type wiphy_type = {
1489 .name = "wlan",
1490 };
1491
cfg80211_update_iface_num(struct cfg80211_registered_device * rdev,enum nl80211_iftype iftype,int num)1492 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
1493 enum nl80211_iftype iftype, int num)
1494 {
1495 lockdep_assert_held(&rdev->wiphy.mtx);
1496
1497 rdev->num_running_ifaces += num;
1498 if (iftype == NL80211_IFTYPE_MONITOR)
1499 rdev->num_running_monitor_ifaces += num;
1500 }
1501
cfg80211_leave_locked(struct cfg80211_registered_device * rdev,struct wireless_dev * wdev,int link_id)1502 void cfg80211_leave_locked(struct cfg80211_registered_device *rdev,
1503 struct wireless_dev *wdev, int link_id)
1504 {
1505 struct net_device *dev = wdev->netdev;
1506 struct cfg80211_sched_scan_request *pos, *tmp;
1507
1508 lockdep_assert_held(&rdev->wiphy.mtx);
1509
1510 cfg80211_pmsr_wdev_down(wdev);
1511
1512 cfg80211_stop_radar_detection(wdev);
1513 cfg80211_stop_background_radar_detection(wdev);
1514
1515 switch (wdev->iftype) {
1516 case NL80211_IFTYPE_ADHOC:
1517 cfg80211_leave_ibss(rdev, dev, true);
1518 break;
1519 case NL80211_IFTYPE_P2P_CLIENT:
1520 case NL80211_IFTYPE_STATION:
1521 list_for_each_entry_safe(pos, tmp, &rdev->sched_scan_req_list,
1522 list) {
1523 if (dev == pos->dev)
1524 cfg80211_stop_sched_scan_req(rdev, pos, false);
1525 }
1526
1527 #ifdef CONFIG_CFG80211_WEXT
1528 kfree(wdev->wext.ie);
1529 wdev->wext.ie = NULL;
1530 wdev->wext.ie_len = 0;
1531 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1532 #endif
1533 cfg80211_disconnect(rdev, dev,
1534 WLAN_REASON_DEAUTH_LEAVING, true);
1535 break;
1536 case NL80211_IFTYPE_MESH_POINT:
1537 cfg80211_leave_mesh(rdev, dev);
1538 break;
1539 case NL80211_IFTYPE_AP:
1540 case NL80211_IFTYPE_P2P_GO:
1541 cfg80211_stop_ap(rdev, dev, link_id, true);
1542 break;
1543 case NL80211_IFTYPE_OCB:
1544 cfg80211_leave_ocb(rdev, dev);
1545 break;
1546 case NL80211_IFTYPE_P2P_DEVICE:
1547 cfg80211_stop_p2p_device(rdev, wdev);
1548 break;
1549 case NL80211_IFTYPE_NAN:
1550 cfg80211_stop_nan(rdev, wdev);
1551 break;
1552 case NL80211_IFTYPE_PD:
1553 cfg80211_stop_pd(rdev, wdev);
1554 break;
1555 case NL80211_IFTYPE_AP_VLAN:
1556 case NL80211_IFTYPE_MONITOR:
1557 case NL80211_IFTYPE_NAN_DATA:
1558 /* nothing to do */
1559 break;
1560 case NL80211_IFTYPE_UNSPECIFIED:
1561 case NL80211_IFTYPE_WDS:
1562 case NUM_NL80211_IFTYPES:
1563 /* invalid */
1564 break;
1565 }
1566 }
1567
cfg80211_leave(struct cfg80211_registered_device * rdev,struct wireless_dev * wdev,int link_id)1568 void cfg80211_leave(struct cfg80211_registered_device *rdev,
1569 struct wireless_dev *wdev, int link_id)
1570 {
1571 ASSERT_RTNL();
1572
1573 /* NAN_DATA interfaces must be closed before stopping NAN */
1574 cfg80211_close_dependents(rdev, wdev);
1575
1576 guard(wiphy)(&rdev->wiphy);
1577
1578 cfg80211_leave_locked(rdev, wdev, link_id);
1579 }
1580
cfg80211_stop_link(struct wiphy * wiphy,struct wireless_dev * wdev,int link_id,gfp_t gfp)1581 void cfg80211_stop_link(struct wiphy *wiphy, struct wireless_dev *wdev,
1582 int link_id, gfp_t gfp)
1583 {
1584 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1585 struct cfg80211_event *ev;
1586 unsigned long flags;
1587
1588 /* Only AP/GO interfaces may have a specific link_id */
1589 if (WARN_ON_ONCE(link_id != -1 &&
1590 wdev->iftype != NL80211_IFTYPE_AP &&
1591 wdev->iftype != NL80211_IFTYPE_P2P_GO))
1592 link_id = -1;
1593
1594 trace_cfg80211_stop_link(wiphy, wdev, link_id);
1595
1596 if (wdev->iftype == NL80211_IFTYPE_NAN)
1597 return;
1598
1599 ev = kzalloc_obj(*ev, gfp);
1600 if (!ev)
1601 return;
1602
1603 ev->type = EVENT_STOPPED;
1604 ev->link_id = link_id;
1605
1606 spin_lock_irqsave(&wdev->event_lock, flags);
1607 list_add_tail(&ev->list, &wdev->event_list);
1608 spin_unlock_irqrestore(&wdev->event_lock, flags);
1609 queue_work(cfg80211_wq, &rdev->event_work);
1610 }
1611 EXPORT_SYMBOL(cfg80211_stop_link);
1612
cfg80211_init_wdev(struct wireless_dev * wdev)1613 void cfg80211_init_wdev(struct wireless_dev *wdev)
1614 {
1615 INIT_LIST_HEAD(&wdev->event_list);
1616 spin_lock_init(&wdev->event_lock);
1617 INIT_LIST_HEAD(&wdev->mgmt_registrations);
1618 INIT_LIST_HEAD(&wdev->pmsr_list);
1619 spin_lock_init(&wdev->pmsr_lock);
1620 wiphy_work_init(&wdev->pmsr_free_wk, cfg80211_pmsr_free_wk);
1621
1622 #ifdef CONFIG_CFG80211_WEXT
1623 wdev->wext.default_key = -1;
1624 wdev->wext.default_mgmt_key = -1;
1625 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1626 #endif
1627
1628 wiphy_work_init(&wdev->cqm_rssi_work, cfg80211_cqm_rssi_notify_work);
1629
1630 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
1631 wdev->ps = true;
1632 else
1633 wdev->ps = false;
1634 /* allow mac80211 to determine the timeout */
1635 wdev->ps_timeout = -1;
1636
1637 wdev->radio_mask = BIT(wdev->wiphy->n_radio) - 1;
1638
1639 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1640 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
1641 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
1642 wdev->netdev->priv_flags |= IFF_DONT_BRIDGE;
1643
1644 wiphy_work_init(&wdev->disconnect_wk, cfg80211_autodisconnect_wk);
1645 }
1646
cfg80211_register_wdev(struct cfg80211_registered_device * rdev,struct wireless_dev * wdev)1647 void cfg80211_register_wdev(struct cfg80211_registered_device *rdev,
1648 struct wireless_dev *wdev)
1649 {
1650 ASSERT_RTNL();
1651 lockdep_assert_held(&rdev->wiphy.mtx);
1652
1653 /*
1654 * We get here also when the interface changes network namespaces,
1655 * as it's registered into the new one, but we don't want it to
1656 * change ID in that case. Checking if the ID is already assigned
1657 * works, because 0 isn't considered a valid ID and the memory is
1658 * 0-initialized.
1659 */
1660 if (!wdev->identifier)
1661 wdev->identifier = ++rdev->wdev_id;
1662 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
1663 rdev->devlist_generation++;
1664 wdev->registered = true;
1665
1666 if (wdev->netdev &&
1667 sysfs_create_link(&wdev->netdev->dev.kobj, &rdev->wiphy.dev.kobj,
1668 "phy80211"))
1669 pr_err("failed to add phy80211 symlink to netdev!\n");
1670
1671 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
1672 }
1673
cfg80211_register_netdevice(struct net_device * dev)1674 int cfg80211_register_netdevice(struct net_device *dev)
1675 {
1676 struct wireless_dev *wdev = dev->ieee80211_ptr;
1677 struct cfg80211_registered_device *rdev;
1678 int ret;
1679
1680 ASSERT_RTNL();
1681
1682 if (WARN_ON(!wdev))
1683 return -EINVAL;
1684
1685 rdev = wiphy_to_rdev(wdev->wiphy);
1686
1687 lockdep_assert_held(&rdev->wiphy.mtx);
1688
1689 /* we'll take care of this */
1690 wdev->registered = true;
1691 wdev->registering = true;
1692 ret = register_netdevice(dev);
1693 if (ret)
1694 goto out;
1695
1696 cfg80211_register_wdev(rdev, wdev);
1697 ret = 0;
1698 out:
1699 wdev->registering = false;
1700 if (ret)
1701 wdev->registered = false;
1702 return ret;
1703 }
1704 EXPORT_SYMBOL(cfg80211_register_netdevice);
1705
cfg80211_netdev_notifier_call(struct notifier_block * nb,unsigned long state,void * ptr)1706 static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
1707 unsigned long state, void *ptr)
1708 {
1709 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1710 struct wireless_dev *wdev = dev->ieee80211_ptr;
1711 struct cfg80211_registered_device *rdev;
1712 struct cfg80211_sched_scan_request *pos, *tmp;
1713
1714 if (!wdev)
1715 return NOTIFY_DONE;
1716
1717 rdev = wiphy_to_rdev(wdev->wiphy);
1718
1719 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
1720
1721 switch (state) {
1722 case NETDEV_POST_INIT:
1723 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
1724 wdev->netdev = dev;
1725 /* can only change netns with wiphy */
1726 dev->netns_immutable = true;
1727
1728 cfg80211_init_wdev(wdev);
1729 break;
1730 case NETDEV_REGISTER:
1731 if (!wdev->registered) {
1732 guard(wiphy)(&rdev->wiphy);
1733
1734 cfg80211_register_wdev(rdev, wdev);
1735 }
1736 break;
1737 case NETDEV_UNREGISTER:
1738 /*
1739 * It is possible to get NETDEV_UNREGISTER multiple times,
1740 * so check wdev->registered.
1741 */
1742 if (wdev->registered && !wdev->registering) {
1743 guard(wiphy)(&rdev->wiphy);
1744
1745 _cfg80211_unregister_wdev(wdev, false);
1746 }
1747 break;
1748 case NETDEV_GOING_DOWN:
1749 cfg80211_leave(rdev, wdev, -1);
1750 scoped_guard(wiphy, &rdev->wiphy) {
1751 cfg80211_remove_links(wdev);
1752 /* since we just did cfg80211_leave() nothing to do there */
1753 wiphy_work_cancel(wdev->wiphy, &wdev->disconnect_wk);
1754 }
1755 break;
1756 case NETDEV_DOWN:
1757 wiphy_lock(&rdev->wiphy);
1758 cfg80211_update_iface_num(rdev, wdev->iftype, -1);
1759 if (rdev->scan_req && rdev->scan_req->req.wdev == wdev) {
1760 if (WARN_ON(!rdev->scan_req->notified &&
1761 (!rdev->int_scan_req ||
1762 !rdev->int_scan_req->notified)))
1763 rdev->scan_req->info.aborted = true;
1764 ___cfg80211_scan_done(rdev, false);
1765 }
1766
1767 list_for_each_entry_safe(pos, tmp,
1768 &rdev->sched_scan_req_list, list) {
1769 if (WARN_ON(pos->dev == wdev->netdev))
1770 cfg80211_stop_sched_scan_req(rdev, pos, false);
1771 }
1772
1773 rdev->opencount--;
1774 wiphy_unlock(&rdev->wiphy);
1775 wake_up(&rdev->dev_wait);
1776 break;
1777 case NETDEV_UP:
1778 wiphy_lock(&rdev->wiphy);
1779 cfg80211_update_iface_num(rdev, wdev->iftype, 1);
1780 switch (wdev->iftype) {
1781 #ifdef CONFIG_CFG80211_WEXT
1782 case NL80211_IFTYPE_ADHOC:
1783 cfg80211_ibss_wext_join(rdev, wdev);
1784 break;
1785 case NL80211_IFTYPE_STATION:
1786 cfg80211_mgd_wext_connect(rdev, wdev);
1787 break;
1788 #endif
1789 #ifdef CONFIG_MAC80211_MESH
1790 case NL80211_IFTYPE_MESH_POINT:
1791 {
1792 /* backward compat code... */
1793 struct mesh_setup setup;
1794 memcpy(&setup, &default_mesh_setup,
1795 sizeof(setup));
1796 /* back compat only needed for mesh_id */
1797 setup.mesh_id = wdev->u.mesh.id;
1798 setup.mesh_id_len = wdev->u.mesh.id_up_len;
1799 if (wdev->u.mesh.id_up_len)
1800 __cfg80211_join_mesh(rdev, dev,
1801 &setup,
1802 &default_mesh_config);
1803 break;
1804 }
1805 #endif
1806 default:
1807 break;
1808 }
1809 rdev->opencount++;
1810
1811 /*
1812 * Configure power management to the driver here so that its
1813 * correctly set also after interface type changes etc.
1814 */
1815 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1816 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
1817 rdev->ops->set_power_mgmt &&
1818 rdev_set_power_mgmt(rdev, dev, wdev->ps,
1819 wdev->ps_timeout)) {
1820 /* assume this means it's off */
1821 wdev->ps = false;
1822 }
1823 wiphy_unlock(&rdev->wiphy);
1824 break;
1825 case NETDEV_PRE_UP:
1826 if (!cfg80211_iftype_allowed(wdev->wiphy, wdev->iftype,
1827 wdev->use_4addr, 0))
1828 return notifier_from_errno(-EOPNOTSUPP);
1829
1830 if (rfkill_blocked(rdev->wiphy.rfkill))
1831 return notifier_from_errno(-ERFKILL);
1832
1833 /* NAN_DATA interfaces require a running NAN interface */
1834 if (wdev->iftype == NL80211_IFTYPE_NAN_DATA) {
1835 struct wireless_dev *iter;
1836 bool nan_started = false;
1837
1838 list_for_each_entry(iter, &rdev->wiphy.wdev_list, list) {
1839 if (iter->iftype == NL80211_IFTYPE_NAN &&
1840 wdev_running(iter)) {
1841 nan_started = true;
1842 break;
1843 }
1844 }
1845
1846 if (!nan_started)
1847 return notifier_from_errno(-ENOLINK);
1848 }
1849 break;
1850 default:
1851 return NOTIFY_DONE;
1852 }
1853
1854 wireless_nlevent_flush();
1855
1856 return NOTIFY_OK;
1857 }
1858
1859 static struct notifier_block cfg80211_netdev_notifier = {
1860 .notifier_call = cfg80211_netdev_notifier_call,
1861 };
1862
cfg80211_pernet_exit(struct net * net)1863 static void __net_exit cfg80211_pernet_exit(struct net *net)
1864 {
1865 struct cfg80211_registered_device *rdev;
1866
1867 rtnl_lock();
1868 for_each_rdev(rdev) {
1869 if (net_eq(wiphy_net(&rdev->wiphy), net))
1870 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
1871 }
1872 rtnl_unlock();
1873 }
1874
1875 static struct pernet_operations cfg80211_pernet_ops = {
1876 .exit = cfg80211_pernet_exit,
1877 };
1878
wiphy_work_queue(struct wiphy * wiphy,struct wiphy_work * work)1879 void wiphy_work_queue(struct wiphy *wiphy, struct wiphy_work *work)
1880 {
1881 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1882 unsigned long flags;
1883
1884 trace_wiphy_work_queue(wiphy, work);
1885
1886 spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
1887 if (list_empty(&work->entry))
1888 list_add_tail(&work->entry, &rdev->wiphy_work_list);
1889 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
1890
1891 queue_work(system_dfl_wq, &rdev->wiphy_work);
1892 }
1893 EXPORT_SYMBOL_GPL(wiphy_work_queue);
1894
wiphy_work_cancel(struct wiphy * wiphy,struct wiphy_work * work)1895 void wiphy_work_cancel(struct wiphy *wiphy, struct wiphy_work *work)
1896 {
1897 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1898 unsigned long flags;
1899
1900 lockdep_assert_held(&wiphy->mtx);
1901
1902 trace_wiphy_work_cancel(wiphy, work);
1903
1904 spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
1905 if (!list_empty(&work->entry))
1906 list_del_init(&work->entry);
1907 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
1908 }
1909 EXPORT_SYMBOL_GPL(wiphy_work_cancel);
1910
wiphy_work_flush(struct wiphy * wiphy,struct wiphy_work * work)1911 void wiphy_work_flush(struct wiphy *wiphy, struct wiphy_work *work)
1912 {
1913 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1914 unsigned long flags;
1915 bool run;
1916
1917 trace_wiphy_work_flush(wiphy, work);
1918
1919 spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
1920 run = !work || !list_empty(&work->entry);
1921 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
1922
1923 if (run)
1924 cfg80211_process_wiphy_works(rdev, work);
1925 }
1926 EXPORT_SYMBOL_GPL(wiphy_work_flush);
1927
wiphy_delayed_work_timer(struct timer_list * t)1928 void wiphy_delayed_work_timer(struct timer_list *t)
1929 {
1930 struct wiphy_delayed_work *dwork = timer_container_of(dwork, t, timer);
1931
1932 wiphy_work_queue(dwork->wiphy, &dwork->work);
1933 }
1934 EXPORT_SYMBOL(wiphy_delayed_work_timer);
1935
wiphy_delayed_work_queue(struct wiphy * wiphy,struct wiphy_delayed_work * dwork,unsigned long delay)1936 void wiphy_delayed_work_queue(struct wiphy *wiphy,
1937 struct wiphy_delayed_work *dwork,
1938 unsigned long delay)
1939 {
1940 trace_wiphy_delayed_work_queue(wiphy, &dwork->work, delay);
1941
1942 if (!delay) {
1943 timer_delete(&dwork->timer);
1944 wiphy_work_queue(wiphy, &dwork->work);
1945 return;
1946 }
1947
1948 dwork->wiphy = wiphy;
1949 mod_timer(&dwork->timer, jiffies + delay);
1950 }
1951 EXPORT_SYMBOL_GPL(wiphy_delayed_work_queue);
1952
wiphy_delayed_work_cancel(struct wiphy * wiphy,struct wiphy_delayed_work * dwork)1953 void wiphy_delayed_work_cancel(struct wiphy *wiphy,
1954 struct wiphy_delayed_work *dwork)
1955 {
1956 lockdep_assert_held(&wiphy->mtx);
1957
1958 timer_delete_sync(&dwork->timer);
1959 wiphy_work_cancel(wiphy, &dwork->work);
1960 }
1961 EXPORT_SYMBOL_GPL(wiphy_delayed_work_cancel);
1962
wiphy_delayed_work_flush(struct wiphy * wiphy,struct wiphy_delayed_work * dwork)1963 void wiphy_delayed_work_flush(struct wiphy *wiphy,
1964 struct wiphy_delayed_work *dwork)
1965 {
1966 lockdep_assert_held(&wiphy->mtx);
1967
1968 timer_delete_sync(&dwork->timer);
1969 wiphy_work_flush(wiphy, &dwork->work);
1970 }
1971 EXPORT_SYMBOL_GPL(wiphy_delayed_work_flush);
1972
wiphy_delayed_work_pending(struct wiphy * wiphy,struct wiphy_delayed_work * dwork)1973 bool wiphy_delayed_work_pending(struct wiphy *wiphy,
1974 struct wiphy_delayed_work *dwork)
1975 {
1976 return timer_pending(&dwork->timer);
1977 }
1978 EXPORT_SYMBOL_GPL(wiphy_delayed_work_pending);
1979
wiphy_hrtimer_work_timer(struct hrtimer * t)1980 enum hrtimer_restart wiphy_hrtimer_work_timer(struct hrtimer *t)
1981 {
1982 struct wiphy_hrtimer_work *hrwork =
1983 container_of(t, struct wiphy_hrtimer_work, timer);
1984
1985 wiphy_work_queue(hrwork->wiphy, &hrwork->work);
1986
1987 return HRTIMER_NORESTART;
1988 }
1989 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_timer);
1990
wiphy_hrtimer_work_queue(struct wiphy * wiphy,struct wiphy_hrtimer_work * hrwork,ktime_t delay)1991 void wiphy_hrtimer_work_queue(struct wiphy *wiphy,
1992 struct wiphy_hrtimer_work *hrwork,
1993 ktime_t delay)
1994 {
1995 trace_wiphy_hrtimer_work_queue(wiphy, &hrwork->work, delay);
1996
1997 if (!delay) {
1998 hrtimer_cancel(&hrwork->timer);
1999 wiphy_work_queue(wiphy, &hrwork->work);
2000 return;
2001 }
2002
2003 hrwork->wiphy = wiphy;
2004 hrtimer_start_range_ns(&hrwork->timer, delay,
2005 1000 * NSEC_PER_USEC, HRTIMER_MODE_REL);
2006 }
2007 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_queue);
2008
wiphy_hrtimer_work_cancel(struct wiphy * wiphy,struct wiphy_hrtimer_work * hrwork)2009 void wiphy_hrtimer_work_cancel(struct wiphy *wiphy,
2010 struct wiphy_hrtimer_work *hrwork)
2011 {
2012 lockdep_assert_held(&wiphy->mtx);
2013
2014 hrtimer_cancel(&hrwork->timer);
2015 wiphy_work_cancel(wiphy, &hrwork->work);
2016 }
2017 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_cancel);
2018
wiphy_hrtimer_work_flush(struct wiphy * wiphy,struct wiphy_hrtimer_work * hrwork)2019 void wiphy_hrtimer_work_flush(struct wiphy *wiphy,
2020 struct wiphy_hrtimer_work *hrwork)
2021 {
2022 lockdep_assert_held(&wiphy->mtx);
2023
2024 hrtimer_cancel(&hrwork->timer);
2025 wiphy_work_flush(wiphy, &hrwork->work);
2026 }
2027 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_flush);
2028
wiphy_hrtimer_work_pending(struct wiphy * wiphy,struct wiphy_hrtimer_work * hrwork)2029 bool wiphy_hrtimer_work_pending(struct wiphy *wiphy,
2030 struct wiphy_hrtimer_work *hrwork)
2031 {
2032 return hrtimer_is_queued(&hrwork->timer);
2033 }
2034 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_pending);
2035
cfg80211_init(void)2036 static int __init cfg80211_init(void)
2037 {
2038 int err;
2039
2040 err = register_pernet_device(&cfg80211_pernet_ops);
2041 if (err)
2042 goto out_fail_pernet;
2043
2044 err = wiphy_sysfs_init();
2045 if (err)
2046 goto out_fail_sysfs;
2047
2048 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
2049 if (err)
2050 goto out_fail_notifier;
2051
2052 err = nl80211_init();
2053 if (err)
2054 goto out_fail_nl80211;
2055
2056 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
2057
2058 err = regulatory_init();
2059 if (err)
2060 goto out_fail_reg;
2061
2062 cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM);
2063 if (!cfg80211_wq) {
2064 err = -ENOMEM;
2065 goto out_fail_wq;
2066 }
2067
2068 return 0;
2069
2070 out_fail_wq:
2071 regulatory_exit();
2072 out_fail_reg:
2073 debugfs_remove(ieee80211_debugfs_dir);
2074 nl80211_exit();
2075 out_fail_nl80211:
2076 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
2077 out_fail_notifier:
2078 wiphy_sysfs_exit();
2079 out_fail_sysfs:
2080 unregister_pernet_device(&cfg80211_pernet_ops);
2081 out_fail_pernet:
2082 return err;
2083 }
2084 fs_initcall(cfg80211_init);
2085
cfg80211_exit(void)2086 static void __exit cfg80211_exit(void)
2087 {
2088 debugfs_remove(ieee80211_debugfs_dir);
2089 nl80211_exit();
2090 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
2091 wiphy_sysfs_exit();
2092 regulatory_exit();
2093 unregister_pernet_device(&cfg80211_pernet_ops);
2094 destroy_workqueue(cfg80211_wq);
2095 }
2096 module_exit(cfg80211_exit);
2097