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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * This is the linux wireless configuration interface.
4 *
5 * Copyright 2006-2010 Johannes Berg <[email protected]>
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
40MODULE_AUTHOR("Johannes Berg");
41MODULE_LICENSE("GPL");
42MODULE_DESCRIPTION("wireless configuration support");
43MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME);
44
45/* RCU-protected (and RTNL for writers) */
46LIST_HEAD(cfg80211_rdev_list);
47int cfg80211_rdev_list_generation;
48
49/* for debugfs */
50static struct dentry *ieee80211_debugfs_dir;
51
52/* for the cleanup, scan and event works */
53struct workqueue_struct *cfg80211_wq;
54
55static bool cfg80211_disable_40mhz_24ghz;
56module_param(cfg80211_disable_40mhz_24ghz, bool, 0644);
57MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz,
58 "Disable 40MHz support in the 2.4GHz band");
59
60struct 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
76int 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
83struct 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
95static 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
129int 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
156static int cfg80211_switch_wdev_netns(struct wireless_dev *wdev,
157 struct net *net)
158{
159 int err;
160
161 if (!wdev->netdev)
162 return 0;
163
164 wdev->netdev->netns_immutable = false;
165 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
166 wdev->netdev->netns_immutable = true;
167
168 return err;
169}
170
171static int __cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
172 struct net *net, bool force)
173{
174 struct net *old_net = wiphy_net(&rdev->wiphy);
175 struct wireless_dev *wdev, *tmp;
176 int err = 0;
177
178 list_for_each_entry_safe(wdev, tmp, &rdev->wiphy.wdev_list, list) {
179 err = cfg80211_switch_wdev_netns(wdev, net);
180 if (!err)
181 continue;
182 if (!force)
183 goto undo;
184 /* remove interfaces that fail to allow wiphy switching */
185 dev_close(wdev->netdev);
186 scoped_guard(wiphy, &rdev->wiphy)
187 cfg80211_unregister_wdev(wdev);
188 err = 0;
189 }
190
191 scoped_guard(wiphy, &rdev->wiphy) {
192 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
193 if (!wdev->netdev)
194 continue;
195 nl80211_notify_iface(rdev, wdev,
196 NL80211_CMD_DEL_INTERFACE);
197 }
198
199 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
200
201 wiphy_net_set(&rdev->wiphy, net);
202
203 /* this only fails on allocation failure */
204 err = device_rename(&rdev->wiphy.dev,
205 dev_name(&rdev->wiphy.dev));
206 if (err && !force)
207 wiphy_net_set(&rdev->wiphy, old_net);
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,
215 NL80211_CMD_NEW_INTERFACE);
216 }
217 }
218
219 if (!err || force)
220 return err;
221
222 /* set to the last one to undo all of them */
223 wdev = list_entry(&rdev->wiphy.wdev_list, typeof(*wdev), list);
224undo:
225 /*
226 * Move back everything, if this fails again (allocation failures)
227 * then things get stuck in different network namespaces.
228 */
229 list_for_each_entry_continue_reverse(wdev, &rdev->wiphy.wdev_list,
230 list)
231 WARN_ON(cfg80211_switch_wdev_netns(wdev, old_net));
232
233 return err;
234}
235
236int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
237 struct net *net)
238{
239 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK))
240 return -EOPNOTSUPP;
241
242 return __cfg80211_switch_netns(rdev, net, false);
243}
244
245static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
246{
247 struct cfg80211_registered_device *rdev = data;
248
249 guard(wiphy)(&rdev->wiphy);
250
251 rdev_rfkill_poll(rdev);
252}
253
254void cfg80211_stop_p2p_device(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_P2P_DEVICE))
260 return;
261
262 if (!wdev_running(wdev))
263 return;
264
265 cfg80211_pmsr_wdev_down(wdev);
266 rdev_stop_p2p_device(rdev, wdev);
267 wdev->is_running = false;
268
269 rdev->opencount--;
270
271 if (rdev->scan_req && rdev->scan_req->req.wdev == wdev) {
272 if (!rdev->scan_req->notified &&
273 (!rdev->int_scan_req || !rdev->int_scan_req->notified))
274 rdev->scan_req->info.aborted = true;
275 ___cfg80211_scan_done(rdev, false);
276 }
277}
278
279void cfg80211_stop_nan(struct cfg80211_registered_device *rdev,
280 struct wireless_dev *wdev)
281{
282 struct cfg80211_nan_local_sched empty_sched = {};
283
284 lockdep_assert_held(&rdev->wiphy.mtx);
285
286 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_NAN))
287 return;
288
289 if (!wdev_running(wdev))
290 return;
291
292 cfg80211_pmsr_wdev_down(wdev);
293
294 /*
295 * If there is a scheduled update pending, mark it as canceled, so the
296 * empty schedule will be accepted
297 */
298 wdev->u.nan.sched_update_pending = false;
299
300 /* Unschedule all */
301 cfg80211_nan_set_local_schedule(rdev, wdev, &empty_sched);
302
303 rdev_stop_nan(rdev, wdev);
304 wdev->is_running = false;
305
306 eth_zero_addr(wdev->u.nan.cluster_id);
307
308 rdev->opencount--;
309}
310
311int cfg80211_nan_set_local_schedule(struct cfg80211_registered_device *rdev,
312 struct wireless_dev *wdev,
313 struct cfg80211_nan_local_sched *sched)
314{
315 int ret;
316
317 lockdep_assert_held(&rdev->wiphy.mtx);
318
319 if (wdev->iftype != NL80211_IFTYPE_NAN || !wdev_running(wdev))
320 return -EINVAL;
321
322 if (wdev->u.nan.sched_update_pending)
323 return -EBUSY;
324
325 ret = rdev_nan_set_local_sched(rdev, wdev, sched);
326 if (ret)
327 return ret;
328
329 wdev->u.nan.sched_update_pending = sched->deferred;
330
331 kfree(wdev->u.nan.chandefs);
332 wdev->u.nan.chandefs = NULL;
333 wdev->u.nan.n_channels = 0;
334
335 if (!sched->n_channels)
336 return 0;
337
338 wdev->u.nan.chandefs = kzalloc_objs(*wdev->u.nan.chandefs,
339 sched->n_channels);
340 if (!wdev->u.nan.chandefs)
341 return -ENOMEM;
342
343 for (int i = 0; i < sched->n_channels; i++)
344 wdev->u.nan.chandefs[i] = sched->nan_channels[i].chandef;
345
346 wdev->u.nan.n_channels = sched->n_channels;
347
348 return 0;
349}
350
351void cfg80211_stop_pd(struct cfg80211_registered_device *rdev,
352 struct wireless_dev *wdev)
353{
354 lockdep_assert_held(&rdev->wiphy.mtx);
355
356 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_PD))
357 return;
358
359 if (!rdev->ops->stop_pd)
360 return;
361
362 if (!wdev_running(wdev))
363 return;
364
365 cfg80211_pmsr_wdev_down(wdev);
366
367 rdev_stop_pd(rdev, wdev);
368 wdev->is_running = false;
369
370 rdev->opencount--;
371}
372
373void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy)
374{
375 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
376 struct wireless_dev *wdev;
377
378 ASSERT_RTNL();
379
380 /*
381 * Some netdev interfaces need to be closed before some non-netdev
382 * ones, i.e. NAN_DATA interfaces need to be closed before the NAN
383 * interface
384 */
385 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
386 if (wdev->netdev) {
387 dev_close(wdev->netdev);
388 continue;
389 }
390 }
391
392 guard(wiphy)(wiphy);
393
394 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
395 switch (wdev->iftype) {
396 case NL80211_IFTYPE_P2P_DEVICE:
397 cfg80211_stop_p2p_device(rdev, wdev);
398 break;
399 case NL80211_IFTYPE_NAN:
400 cfg80211_stop_nan(rdev, wdev);
401 break;
402 case NL80211_IFTYPE_PD:
403 cfg80211_stop_pd(rdev, wdev);
404 break;
405 default:
406 break;
407 }
408 }
409}
410EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces);
411
412static int cfg80211_rfkill_set_block(void *data, bool blocked)
413{
414 struct cfg80211_registered_device *rdev = data;
415
416 if (!blocked)
417 return 0;
418
419 rtnl_lock();
420 cfg80211_shutdown_all_interfaces(&rdev->wiphy);
421 rtnl_unlock();
422
423 return 0;
424}
425
426static void cfg80211_rfkill_block_work(struct work_struct *work)
427{
428 struct cfg80211_registered_device *rdev;
429
430 rdev = container_of(work, struct cfg80211_registered_device,
431 rfkill_block);
432 cfg80211_rfkill_set_block(rdev, true);
433}
434
435static void cfg80211_event_work(struct work_struct *work)
436{
437 struct cfg80211_registered_device *rdev;
438
439 rdev = container_of(work, struct cfg80211_registered_device,
440 event_work);
441
442 guard(wiphy)(&rdev->wiphy);
443
444 cfg80211_process_rdev_events(rdev);
445}
446
447void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev)
448{
449 struct wireless_dev *wdev, *tmp;
450
451 ASSERT_RTNL();
452
453 list_for_each_entry_safe(wdev, tmp, &rdev->wiphy.wdev_list, list) {
454 if (wdev->nl_owner_dead) {
455 cfg80211_close_dependents(rdev, wdev);
456
457 if (wdev->netdev)
458 dev_close(wdev->netdev);
459
460 guard(wiphy)(&rdev->wiphy);
461
462 cfg80211_remove_virtual_intf(rdev, wdev);
463 }
464 }
465}
466
467void cfg80211_close_dependents(struct cfg80211_registered_device *rdev,
468 struct wireless_dev *wdev)
469{
470 ASSERT_RTNL();
471
472 if (wdev->iftype != NL80211_IFTYPE_NAN)
473 return;
474
475 /* Close all NAN DATA interfaces */
476 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
477 if (wdev->iftype == NL80211_IFTYPE_NAN_DATA)
478 dev_close(wdev->netdev);
479 }
480}
481
482static void cfg80211_destroy_iface_wk(struct work_struct *work)
483{
484 struct cfg80211_registered_device *rdev;
485
486 rdev = container_of(work, struct cfg80211_registered_device,
487 destroy_work);
488
489 rtnl_lock();
490 cfg80211_destroy_ifaces(rdev);
491 rtnl_unlock();
492}
493
494static void cfg80211_sched_scan_stop_wk(struct wiphy *wiphy,
495 struct wiphy_work *work)
496{
497 struct cfg80211_registered_device *rdev;
498 struct cfg80211_sched_scan_request *req, *tmp;
499
500 rdev = container_of(work, struct cfg80211_registered_device,
501 sched_scan_stop_wk);
502
503 list_for_each_entry_safe(req, tmp, &rdev->sched_scan_req_list, list) {
504 if (req->nl_owner_dead)
505 cfg80211_stop_sched_scan_req(rdev, req, false);
506 }
507}
508
509static void cfg80211_propagate_radar_detect_wk(struct work_struct *work)
510{
511 struct cfg80211_registered_device *rdev;
512
513 rdev = container_of(work, struct cfg80211_registered_device,
514 propagate_radar_detect_wk);
515
516 rtnl_lock();
517
518 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->radar_chandef,
519 NL80211_DFS_UNAVAILABLE,
520 NL80211_RADAR_DETECTED);
521
522 rtnl_unlock();
523}
524
525static void cfg80211_propagate_cac_done_wk(struct work_struct *work)
526{
527 struct cfg80211_registered_device *rdev;
528
529 rdev = container_of(work, struct cfg80211_registered_device,
530 propagate_cac_done_wk);
531
532 rtnl_lock();
533
534 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->cac_done_chandef,
535 NL80211_DFS_AVAILABLE,
536 NL80211_RADAR_CAC_FINISHED);
537
538 rtnl_unlock();
539}
540
541static void cfg80211_wiphy_work(struct work_struct *work)
542{
543 struct cfg80211_registered_device *rdev;
544 struct wiphy_work *wk;
545
546 rdev = container_of(work, struct cfg80211_registered_device, wiphy_work);
547
548 trace_wiphy_work_worker_start(&rdev->wiphy);
549
550 guard(wiphy)(&rdev->wiphy);
551 if (rdev->suspended)
552 return;
553
554 spin_lock_irq(&rdev->wiphy_work_lock);
555 wk = list_first_entry_or_null(&rdev->wiphy_work_list,
556 struct wiphy_work, entry);
557 if (wk) {
558 list_del_init(&wk->entry);
559 if (!list_empty(&rdev->wiphy_work_list))
560 queue_work(system_dfl_wq, work);
561 spin_unlock_irq(&rdev->wiphy_work_lock);
562
563 trace_wiphy_work_run(&rdev->wiphy, wk);
564 wk->func(&rdev->wiphy, wk);
565 } else {
566 spin_unlock_irq(&rdev->wiphy_work_lock);
567 }
568}
569
570/* exported functions */
571
572struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv,
573 const char *requested_name)
574{
575 static atomic_t wiphy_counter = ATOMIC_INIT(0);
576
577 struct cfg80211_registered_device *rdev;
578 int alloc_size;
579
580 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
581 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
582 WARN_ON(ops->connect && !ops->disconnect);
583 WARN_ON(ops->join_ibss && !ops->leave_ibss);
584 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
585 WARN_ON(ops->add_station && !ops->del_station);
586 WARN_ON(ops->add_mpath && !ops->del_mpath);
587 WARN_ON(ops->join_mesh && !ops->leave_mesh);
588 WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device);
589 WARN_ON(ops->start_ap && !ops->stop_ap);
590 WARN_ON(ops->join_ocb && !ops->leave_ocb);
591 WARN_ON(ops->suspend && !ops->resume);
592 WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop);
593 WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel);
594 WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch);
595 WARN_ON(ops->add_tx_ts && !ops->del_tx_ts);
596
597 alloc_size = sizeof(*rdev) + sizeof_priv;
598
599 rdev = kzalloc(alloc_size, GFP_KERNEL);
600 if (!rdev)
601 return NULL;
602
603 rdev->ops = ops;
604
605 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter);
606
607 if (unlikely(rdev->wiphy_idx < 0)) {
608 /* ugh, wrapped! */
609 atomic_dec(&wiphy_counter);
610 kfree(rdev);
611 return NULL;
612 }
613
614 /* atomic_inc_return makes it start at 1, make it start at 0 */
615 rdev->wiphy_idx--;
616
617 /* give it a proper name */
618 if (requested_name && requested_name[0]) {
619 int rv;
620
621 rtnl_lock();
622 rv = cfg80211_dev_check_name(rdev, requested_name);
623
624 if (rv < 0) {
625 rtnl_unlock();
626 goto use_default_name;
627 }
628
629 rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name);
630 rtnl_unlock();
631 if (rv)
632 goto use_default_name;
633 } else {
634 int rv;
635
636use_default_name:
637 /* NOTE: This is *probably* safe w/out holding rtnl because of
638 * the restrictions on phy names. Probably this call could
639 * fail if some other part of the kernel (re)named a device
640 * phyX. But, might should add some locking and check return
641 * value, and use a different name if this one exists?
642 */
643 rv = dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
644 if (rv < 0) {
645 kfree(rdev);
646 return NULL;
647 }
648 }
649
650 mutex_init(&rdev->wiphy.mtx);
651 INIT_LIST_HEAD(&rdev->wiphy.wdev_list);
652 INIT_LIST_HEAD(&rdev->beacon_registrations);
653 spin_lock_init(&rdev->beacon_registrations_lock);
654 spin_lock_init(&rdev->bss_lock);
655 INIT_LIST_HEAD(&rdev->bss_list);
656 INIT_LIST_HEAD(&rdev->sched_scan_req_list);
657 wiphy_work_init(&rdev->scan_done_wk, __cfg80211_scan_done);
658 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk,
659 cfg80211_dfs_channels_update_work);
660#ifdef CONFIG_CFG80211_WEXT
661 rdev->wiphy.wext = &cfg80211_wext_handler;
662#endif
663
664 device_initialize(&rdev->wiphy.dev);
665 rdev->wiphy.dev.class = &ieee80211_class;
666 rdev->wiphy.dev.platform_data = rdev;
667 device_enable_async_suspend(&rdev->wiphy.dev);
668
669 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk);
670 wiphy_work_init(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk);
671 INIT_WORK(&rdev->sched_scan_res_wk, cfg80211_sched_scan_results_wk);
672 wiphy_work_init(&rdev->reg_check_chans_wk, reg_leave_invalid_chans_wk);
673 INIT_WORK(&rdev->reg_leave_nan_wk, reg_leave_invalid_nan_wk);
674 INIT_WORK(&rdev->propagate_radar_detect_wk,
675 cfg80211_propagate_radar_detect_wk);
676 INIT_WORK(&rdev->propagate_cac_done_wk, cfg80211_propagate_cac_done_wk);
677 INIT_WORK(&rdev->mgmt_registrations_update_wk,
678 cfg80211_mgmt_registrations_update_wk);
679 spin_lock_init(&rdev->mgmt_registrations_lock);
680 INIT_WORK(&rdev->wiphy_work, cfg80211_wiphy_work);
681 INIT_LIST_HEAD(&rdev->wiphy_work_list);
682 spin_lock_init(&rdev->wiphy_work_lock);
683
684#ifdef CONFIG_CFG80211_DEFAULT_PS
685 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
686#endif
687
688 wiphy_net_set(&rdev->wiphy, &init_net);
689
690 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
691 rdev->wiphy.rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
692 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
693 &rdev->rfkill_ops, rdev);
694
695 if (!rdev->wiphy.rfkill) {
696 wiphy_free(&rdev->wiphy);
697 return NULL;
698 }
699
700 INIT_WORK(&rdev->rfkill_block, cfg80211_rfkill_block_work);
701 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
702 INIT_WORK(&rdev->event_work, cfg80211_event_work);
703 INIT_WORK(&rdev->background_cac_abort_wk,
704 cfg80211_background_cac_abort_wk);
705 INIT_DELAYED_WORK(&rdev->background_cac_done_wk,
706 cfg80211_background_cac_done_wk);
707
708 init_waitqueue_head(&rdev->dev_wait);
709
710 /*
711 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
712 * Fragmentation and RTS threshold are disabled by default with the
713 * special -1 value.
714 */
715 rdev->wiphy.retry_short = 7;
716 rdev->wiphy.retry_long = 4;
717 rdev->wiphy.frag_threshold = (u32) -1;
718 rdev->wiphy.rts_threshold = (u32) -1;
719 rdev->wiphy.coverage_class = 0;
720
721 rdev->wiphy.max_num_csa_counters = 1;
722
723 rdev->wiphy.max_sched_scan_plans = 1;
724 rdev->wiphy.max_sched_scan_plan_interval = U32_MAX;
725
726 return &rdev->wiphy;
727}
728EXPORT_SYMBOL(wiphy_new_nm);
729
730static
731int wiphy_verify_iface_combinations(struct wiphy *wiphy,
732 const struct ieee80211_iface_combination *iface_comb,
733 int n_iface_comb,
734 bool combined_radio)
735{
736 const struct ieee80211_iface_combination *c;
737 int i, j;
738
739 for (i = 0; i < n_iface_comb; i++) {
740 u32 cnt = 0;
741 u16 all_iftypes = 0;
742
743 c = &iface_comb[i];
744
745 /*
746 * Combinations with just one interface aren't real,
747 * however we make an exception for DFS.
748 */
749 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths))
750 return -EINVAL;
751
752 /* Need at least one channel */
753 if (WARN_ON(!c->num_different_channels))
754 return -EINVAL;
755
756 /* DFS only works on one channel. Avoid this check
757 * for multi-radio global combination, since it hold
758 * the capabilities of all radio combinations.
759 */
760 if (!combined_radio &&
761 WARN_ON(c->radar_detect_widths &&
762 c->num_different_channels > 1))
763 return -EINVAL;
764
765 if (WARN_ON(!c->n_limits))
766 return -EINVAL;
767
768 for (j = 0; j < c->n_limits; j++) {
769 u16 types = c->limits[j].types;
770
771 /* interface types shouldn't overlap */
772 if (WARN_ON(types & all_iftypes))
773 return -EINVAL;
774 all_iftypes |= types;
775
776 if (WARN_ON(!c->limits[j].max))
777 return -EINVAL;
778
779 /* Shouldn't list software iftypes in combinations! */
780 if (WARN_ON(wiphy->software_iftypes & types))
781 return -EINVAL;
782
783 /* Only a single P2P_DEVICE can be allowed, avoid this
784 * check for multi-radio global combination, since it
785 * hold the capabilities of all radio combinations.
786 */
787 if (!combined_radio &&
788 WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) &&
789 c->limits[j].max > 1))
790 return -EINVAL;
791
792 /* Only a single NAN can be allowed */
793 if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) &&
794 c->limits[j].max > 1))
795 return -EINVAL;
796
797 /*
798 * This isn't well-defined right now. If you have an
799 * IBSS interface, then its beacon interval may change
800 * by joining other networks, and nothing prevents it
801 * from doing that.
802 * So technically we probably shouldn't even allow AP
803 * and IBSS in the same interface, but it seems that
804 * some drivers support that, possibly only with fixed
805 * beacon intervals for IBSS.
806 */
807 if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) &&
808 c->beacon_int_min_gcd)) {
809 return -EINVAL;
810 }
811
812 cnt += c->limits[j].max;
813 /*
814 * Don't advertise an unsupported type
815 * in a combination.
816 */
817 if (WARN_ON((wiphy->interface_modes & types) != types))
818 return -EINVAL;
819 }
820
821 if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS)))
822 return -EINVAL;
823
824 /* You can't even choose that many! */
825 if (WARN_ON(cnt < c->max_interfaces))
826 return -EINVAL;
827 }
828
829 return 0;
830}
831
832static int wiphy_verify_combinations(struct wiphy *wiphy)
833{
834 int i, ret;
835 bool combined_radio = false;
836
837 if (wiphy->n_radio) {
838 for (i = 0; i < wiphy->n_radio; i++) {
839 const struct wiphy_radio *radio = &wiphy->radio[i];
840
841 ret = wiphy_verify_iface_combinations(wiphy,
842 radio->iface_combinations,
843 radio->n_iface_combinations,
844 false);
845 if (ret)
846 return ret;
847 }
848
849 combined_radio = true;
850 }
851
852 ret = wiphy_verify_iface_combinations(wiphy,
853 wiphy->iface_combinations,
854 wiphy->n_iface_combinations,
855 combined_radio);
856
857 return ret;
858}
859
860static bool wiphy_cipher_suites_valid(const struct wiphy *wiphy)
861{
862 int i, j;
863
864 if (wiphy->n_cipher_suites && !wiphy->cipher_suites)
865 return false;
866
867 for (i = 0; i < wiphy->n_cipher_suites; i++) {
868 for (j = 0; j < i; j++) {
869 if (wiphy->cipher_suites[i] ==
870 wiphy->cipher_suites[j])
871 return false;
872 }
873 }
874
875 return true;
876}
877
878int wiphy_register(struct wiphy *wiphy)
879{
880 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
881 int res;
882 enum nl80211_band band;
883 struct ieee80211_supported_band *sband;
884 bool have_band = false;
885 int i;
886 u16 ifmodes = wiphy->interface_modes;
887
888#ifdef CONFIG_PM
889 if (WARN_ON(wiphy->wowlan &&
890 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
891 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
892 return -EINVAL;
893 if (WARN_ON(wiphy->wowlan &&
894 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns &&
895 !wiphy->wowlan->tcp))
896 return -EINVAL;
897#endif
898 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
899 (!rdev->ops->tdls_channel_switch ||
900 !rdev->ops->tdls_cancel_channel_switch)))
901 return -EINVAL;
902 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_PD)) &&
903 (!rdev->ops->start_pd || !rdev->ops->stop_pd)))
904 return -EINVAL;
905
906 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) &&
907 (!rdev->ops->start_nan || !rdev->ops->stop_nan ||
908 !rdev->ops->add_nan_func || !rdev->ops->del_nan_func ||
909 !(wiphy->nan_supported_bands & BIT(NL80211_BAND_2GHZ)))))
910 return -EINVAL;
911
912 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN_DATA)) &&
913 (!wiphy->nan_capa.phy.ht.ht_supported || wiphy->n_radio > 1)))
914 return -EINVAL;
915
916 if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)))
917 return -EINVAL;
918
919 if (WARN_ON(wiphy->pmsr_capa && !wiphy->pmsr_capa->ftm.supported))
920 return -EINVAL;
921
922 if (wiphy->pmsr_capa && wiphy->pmsr_capa->ftm.supported) {
923 if (WARN_ON(!wiphy->pmsr_capa->ftm.asap &&
924 !wiphy->pmsr_capa->ftm.non_asap))
925 return -EINVAL;
926 if (WARN_ON(!wiphy->pmsr_capa->ftm.preambles ||
927 !wiphy->pmsr_capa->ftm.bandwidths))
928 return -EINVAL;
929 if (WARN_ON(wiphy->pmsr_capa->ftm.preambles &
930 ~(BIT(NL80211_PREAMBLE_LEGACY) |
931 BIT(NL80211_PREAMBLE_HT) |
932 BIT(NL80211_PREAMBLE_VHT) |
933 BIT(NL80211_PREAMBLE_HE) |
934 BIT(NL80211_PREAMBLE_DMG))))
935 return -EINVAL;
936 if (WARN_ON((wiphy->pmsr_capa->ftm.trigger_based ||
937 wiphy->pmsr_capa->ftm.non_trigger_based) &&
938 !(wiphy->pmsr_capa->ftm.preambles &
939 BIT(NL80211_PREAMBLE_HE))))
940 return -EINVAL;
941 if (WARN_ON(wiphy->pmsr_capa->ftm.bandwidths &
942 ~(BIT(NL80211_CHAN_WIDTH_20_NOHT) |
943 BIT(NL80211_CHAN_WIDTH_20) |
944 BIT(NL80211_CHAN_WIDTH_40) |
945 BIT(NL80211_CHAN_WIDTH_80) |
946 BIT(NL80211_CHAN_WIDTH_80P80) |
947 BIT(NL80211_CHAN_WIDTH_160) |
948 BIT(NL80211_CHAN_WIDTH_320))))
949 return -EINVAL;
950 }
951
952 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) &&
953 (wiphy->regulatory_flags &
954 (REGULATORY_CUSTOM_REG |
955 REGULATORY_STRICT_REG |
956 REGULATORY_COUNTRY_IE_FOLLOW_POWER |
957 REGULATORY_COUNTRY_IE_IGNORE))))
958 return -EINVAL;
959
960 if (WARN_ON(wiphy->coalesce &&
961 (!wiphy->coalesce->n_rules ||
962 !wiphy->coalesce->n_patterns) &&
963 (!wiphy->coalesce->pattern_min_len ||
964 wiphy->coalesce->pattern_min_len >
965 wiphy->coalesce->pattern_max_len)))
966 return -EINVAL;
967
968 if (WARN_ON(wiphy->ap_sme_capa &&
969 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
970 return -EINVAL;
971
972 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
973 return -EINVAL;
974
975 if (WARN_ON(wiphy->addresses &&
976 !is_zero_ether_addr(wiphy->perm_addr) &&
977 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
978 ETH_ALEN)))
979 return -EINVAL;
980
981 if (WARN_ON(wiphy->max_acl_mac_addrs &&
982 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) ||
983 !rdev->ops->set_mac_acl)))
984 return -EINVAL;
985
986 /* assure only valid behaviours are flagged by driver
987 * hence subtract 2 as bit 0 is invalid.
988 */
989 if (WARN_ON(wiphy->bss_select_support &&
990 (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2))))
991 return -EINVAL;
992
993 if (WARN_ON(wiphy_ext_feature_isset(&rdev->wiphy,
994 NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X) &&
995 (!rdev->ops->set_pmk || !rdev->ops->del_pmk)))
996 return -EINVAL;
997
998 if (WARN_ON(!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
999 rdev->ops->update_connect_params))
1000 return -EINVAL;
1001
1002 if (wiphy->addresses)
1003 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
1004
1005 /* sanity check ifmodes */
1006 WARN_ON(!ifmodes);
1007 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
1008 if (WARN_ON(ifmodes != wiphy->interface_modes))
1009 wiphy->interface_modes = ifmodes;
1010
1011 res = wiphy_verify_combinations(wiphy);
1012 if (res)
1013 return res;
1014
1015 if (!wiphy_cipher_suites_valid(wiphy))
1016 return -EINVAL;
1017
1018 /* sanity check supported bands/channels */
1019 for (band = 0; band < NUM_NL80211_BANDS; band++) {
1020 const struct ieee80211_sband_iftype_data *iftd;
1021 u16 types = 0;
1022 bool have_he = false;
1023
1024 sband = wiphy->bands[band];
1025 if (!sband)
1026 continue;
1027
1028 sband->band = band;
1029 if (WARN_ON(!sband->n_channels))
1030 return -EINVAL;
1031 /*
1032 * on 60GHz or sub-1Ghz band, there are no legacy rates, so
1033 * n_bitrates is 0
1034 */
1035 if (WARN_ON((band != NL80211_BAND_60GHZ &&
1036 band != NL80211_BAND_S1GHZ) &&
1037 !sband->n_bitrates))
1038 return -EINVAL;
1039
1040 if (WARN_ON(band == NL80211_BAND_6GHZ &&
1041 (sband->ht_cap.ht_supported ||
1042 sband->vht_cap.vht_supported)))
1043 return -EINVAL;
1044
1045 /*
1046 * Since cfg80211_disable_40mhz_24ghz is global, we can
1047 * modify the sband's ht data even if the driver uses a
1048 * global structure for that.
1049 */
1050 if (cfg80211_disable_40mhz_24ghz &&
1051 band == NL80211_BAND_2GHZ &&
1052 sband->ht_cap.ht_supported) {
1053 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
1054 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
1055 }
1056
1057 /*
1058 * Since we use a u32 for rate bitmaps in
1059 * ieee80211_get_response_rate, we cannot
1060 * have more than 32 legacy rates.
1061 */
1062 if (WARN_ON(sband->n_bitrates > 32))
1063 return -EINVAL;
1064
1065 for (i = 0; i < sband->n_channels; i++) {
1066 sband->channels[i].orig_flags =
1067 sband->channels[i].flags;
1068 sband->channels[i].orig_mag = INT_MAX;
1069 sband->channels[i].orig_mpwr =
1070 sband->channels[i].max_power;
1071 sband->channels[i].band = band;
1072
1073 if (WARN_ON(sband->channels[i].freq_offset >= 1000))
1074 return -EINVAL;
1075 }
1076
1077 for_each_sband_iftype_data(sband, i, iftd) {
1078 bool has_ap, has_non_ap;
1079 u32 ap_bits = BIT(NL80211_IFTYPE_AP) |
1080 BIT(NL80211_IFTYPE_P2P_GO);
1081
1082 if (WARN_ON(!iftd->types_mask))
1083 return -EINVAL;
1084 if (WARN_ON(types & iftd->types_mask))
1085 return -EINVAL;
1086
1087 /* at least one piece of information must be present */
1088 if (WARN_ON(!iftd->he_cap.has_he))
1089 return -EINVAL;
1090
1091 types |= iftd->types_mask;
1092
1093 if (i == 0)
1094 have_he = iftd->he_cap.has_he;
1095 else
1096 have_he = have_he &&
1097 iftd->he_cap.has_he;
1098
1099 has_ap = iftd->types_mask & ap_bits;
1100 has_non_ap = iftd->types_mask & ~ap_bits;
1101
1102 /*
1103 * For EHT 20 MHz STA, the capabilities format differs
1104 * but to simplify, don't check 20 MHz but rather check
1105 * only if AP and non-AP were mentioned at the same time,
1106 * reject if so.
1107 */
1108 if (WARN_ON(iftd->eht_cap.has_eht &&
1109 has_ap && has_non_ap))
1110 return -EINVAL;
1111 }
1112
1113 if (WARN_ON(!have_he && band == NL80211_BAND_6GHZ))
1114 return -EINVAL;
1115
1116 have_band = true;
1117 }
1118
1119 if (!have_band) {
1120 WARN_ON(1);
1121 return -EINVAL;
1122 }
1123
1124 for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
1125 /*
1126 * Validate we have a policy (can be explicitly set to
1127 * VENDOR_CMD_RAW_DATA which is non-NULL) and also that
1128 * we have at least one of doit/dumpit.
1129 */
1130 if (WARN_ON(!rdev->wiphy.vendor_commands[i].policy))
1131 return -EINVAL;
1132 if (WARN_ON(!rdev->wiphy.vendor_commands[i].doit &&
1133 !rdev->wiphy.vendor_commands[i].dumpit))
1134 return -EINVAL;
1135 }
1136
1137#ifdef CONFIG_PM
1138 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns &&
1139 (!rdev->wiphy.wowlan->pattern_min_len ||
1140 rdev->wiphy.wowlan->pattern_min_len >
1141 rdev->wiphy.wowlan->pattern_max_len)))
1142 return -EINVAL;
1143#endif
1144
1145 if (!wiphy->max_num_akm_suites)
1146 wiphy->max_num_akm_suites = NL80211_MAX_NR_AKM_SUITES;
1147 else if (wiphy->max_num_akm_suites < NL80211_MAX_NR_AKM_SUITES ||
1148 wiphy->max_num_akm_suites > CFG80211_MAX_NUM_AKM_SUITES)
1149 return -EINVAL;
1150
1151 /* Allocate radio configuration space for multi-radio wiphy */
1152 if (wiphy->n_radio > 0) {
1153 int idx;
1154
1155 wiphy->radio_cfg = kzalloc_objs(*wiphy->radio_cfg,
1156 wiphy->n_radio);
1157 if (!wiphy->radio_cfg)
1158 return -ENOMEM;
1159 /*
1160 * Initialize wiphy radio parameters to IEEE 802.11
1161 * MIB default values. RTS threshold is disabled by
1162 * default with the special -1 value.
1163 */
1164 for (idx = 0; idx < wiphy->n_radio; idx++)
1165 wiphy->radio_cfg[idx].rts_threshold = (u32)-1;
1166 }
1167
1168 /* check and set up bitrates */
1169 ieee80211_set_bitrate_flags(wiphy);
1170
1171 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH;
1172
1173 if (rdev->wiphy.bss_param_support & WIPHY_BSS_PARAM_P2P_CTWINDOW)
1174 rdev->wiphy.features |= NL80211_FEATURE_P2P_GO_CTWIN;
1175 else if (rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN)
1176 rdev->wiphy.bss_param_support |= WIPHY_BSS_PARAM_P2P_CTWINDOW;
1177 if (rdev->wiphy.bss_param_support & WIPHY_BSS_PARAM_P2P_OPPPS)
1178 rdev->wiphy.features |= NL80211_FEATURE_P2P_GO_OPPPS;
1179 else if (rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS)
1180 rdev->wiphy.bss_param_support |= WIPHY_BSS_PARAM_P2P_OPPPS;
1181
1182 rtnl_lock();
1183 wiphy_lock(&rdev->wiphy);
1184 res = device_add(&rdev->wiphy.dev);
1185 if (res) {
1186 wiphy_unlock(&rdev->wiphy);
1187 rtnl_unlock();
1188 return res;
1189 }
1190
1191 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
1192 cfg80211_rdev_list_generation++;
1193
1194 /* add to debugfs */
1195 rdev->wiphy.debugfsdir = debugfs_create_dir(wiphy_name(&rdev->wiphy),
1196 ieee80211_debugfs_dir);
1197 if (wiphy->n_radio > 0) {
1198 int idx;
1199 char radio_name[RADIO_DEBUGFSDIR_MAX_LEN];
1200
1201 for (idx = 0; idx < wiphy->n_radio; idx++) {
1202 scnprintf(radio_name, sizeof(radio_name), "radio%d",
1203 idx);
1204 wiphy->radio_cfg[idx].radio_debugfsdir =
1205 debugfs_create_dir(radio_name,
1206 rdev->wiphy.debugfsdir);
1207 }
1208 }
1209
1210 cfg80211_debugfs_rdev_add(rdev);
1211 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
1212 wiphy_unlock(&rdev->wiphy);
1213
1214 /* set up regulatory info */
1215 wiphy_regulatory_register(wiphy);
1216
1217 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
1218 struct regulatory_request request = {
1219 .wiphy_idx = get_wiphy_idx(wiphy),
1220 .initiator = NL80211_REGDOM_SET_BY_DRIVER,
1221 .alpha2[0] = '9',
1222 .alpha2[1] = '9',
1223 };
1224
1225 nl80211_send_reg_change_event(&request);
1226 }
1227
1228 /* Check that nobody globally advertises any capabilities they do not
1229 * advertise on all possible interface types.
1230 */
1231 if (wiphy->extended_capabilities_len &&
1232 wiphy->num_iftype_ext_capab &&
1233 wiphy->iftype_ext_capab) {
1234 u8 supported_on_all, j;
1235 const struct wiphy_iftype_ext_capab *capab;
1236
1237 capab = wiphy->iftype_ext_capab;
1238 for (j = 0; j < wiphy->extended_capabilities_len; j++) {
1239 if (capab[0].extended_capabilities_len > j)
1240 supported_on_all =
1241 capab[0].extended_capabilities[j];
1242 else
1243 supported_on_all = 0x00;
1244 for (i = 1; i < wiphy->num_iftype_ext_capab; i++) {
1245 if (j >= capab[i].extended_capabilities_len) {
1246 supported_on_all = 0x00;
1247 break;
1248 }
1249 supported_on_all &=
1250 capab[i].extended_capabilities[j];
1251 }
1252 if (WARN_ON(wiphy->extended_capabilities[j] &
1253 ~supported_on_all))
1254 break;
1255 }
1256 }
1257
1258 rdev->wiphy.registered = true;
1259 rtnl_unlock();
1260
1261 res = rfkill_register(rdev->wiphy.rfkill);
1262 if (res) {
1263 rfkill_destroy(rdev->wiphy.rfkill);
1264 rdev->wiphy.rfkill = NULL;
1265 wiphy_unregister(&rdev->wiphy);
1266 return res;
1267 }
1268
1269 return 0;
1270}
1271EXPORT_SYMBOL(wiphy_register);
1272
1273void wiphy_rfkill_start_polling(struct wiphy *wiphy)
1274{
1275 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1276
1277 if (!rdev->ops->rfkill_poll)
1278 return;
1279 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
1280 rfkill_resume_polling(wiphy->rfkill);
1281}
1282EXPORT_SYMBOL(wiphy_rfkill_start_polling);
1283
1284void cfg80211_process_wiphy_works(struct cfg80211_registered_device *rdev,
1285 struct wiphy_work *end)
1286{
1287 unsigned int runaway_limit = 100;
1288 unsigned long flags;
1289
1290 lockdep_assert_held(&rdev->wiphy.mtx);
1291
1292 spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
1293 while (!list_empty(&rdev->wiphy_work_list)) {
1294 struct wiphy_work *wk;
1295
1296 wk = list_first_entry(&rdev->wiphy_work_list,
1297 struct wiphy_work, entry);
1298 list_del_init(&wk->entry);
1299 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
1300
1301 trace_wiphy_work_run(&rdev->wiphy, wk);
1302 wk->func(&rdev->wiphy, wk);
1303
1304 spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
1305
1306 if (wk == end)
1307 break;
1308
1309 if (WARN_ON(--runaway_limit == 0))
1310 INIT_LIST_HEAD(&rdev->wiphy_work_list);
1311 }
1312 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
1313}
1314
1315void wiphy_unregister(struct wiphy *wiphy)
1316{
1317 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1318
1319 wait_event(rdev->dev_wait, ({
1320 int __count;
1321 wiphy_lock(&rdev->wiphy);
1322 __count = rdev->opencount;
1323 wiphy_unlock(&rdev->wiphy);
1324 __count == 0; }));
1325
1326 if (rdev->wiphy.rfkill)
1327 rfkill_unregister(rdev->wiphy.rfkill);
1328
1329 rtnl_lock();
1330 wiphy_lock(&rdev->wiphy);
1331 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
1332 rdev->wiphy.registered = false;
1333
1334 WARN_ON(!list_empty(&rdev->wiphy.wdev_list));
1335
1336 /*
1337 * First remove the hardware from everywhere, this makes
1338 * it impossible to find from userspace.
1339 */
1340 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
1341 list_del_rcu(&rdev->list);
1342 synchronize_rcu();
1343
1344 /*
1345 * If this device got a regulatory hint tell core its
1346 * free to listen now to a new shiny device regulatory hint
1347 */
1348 wiphy_regulatory_deregister(wiphy);
1349
1350 cfg80211_rdev_list_generation++;
1351 device_del(&rdev->wiphy.dev);
1352
1353#ifdef CONFIG_PM
1354 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
1355 rdev_set_wakeup(rdev, false);
1356#endif
1357
1358 /* surely nothing is reachable now, clean up work */
1359 cfg80211_process_wiphy_works(rdev, NULL);
1360 wiphy_unlock(&rdev->wiphy);
1361 rtnl_unlock();
1362
1363 /* this has nothing to do now but make sure it's gone */
1364 cancel_work_sync(&rdev->wiphy_work);
1365
1366 cancel_work_sync(&rdev->sched_scan_res_wk);
1367 cancel_work_sync(&rdev->rfkill_block);
1368 cancel_work_sync(&rdev->conn_work);
1369 flush_work(&rdev->event_work);
1370 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
1371 cancel_delayed_work_sync(&rdev->background_cac_done_wk);
1372 flush_work(&rdev->destroy_work);
1373 flush_work(&rdev->reg_leave_nan_wk);
1374 flush_work(&rdev->propagate_radar_detect_wk);
1375 flush_work(&rdev->propagate_cac_done_wk);
1376 flush_work(&rdev->mgmt_registrations_update_wk);
1377 flush_work(&rdev->background_cac_abort_wk);
1378
1379 cfg80211_rdev_free_wowlan(rdev);
1380 cfg80211_free_coalesce(rdev->coalesce);
1381 rdev->coalesce = NULL;
1382}
1383EXPORT_SYMBOL(wiphy_unregister);
1384
1385void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
1386{
1387 struct cfg80211_internal_bss *scan, *tmp;
1388 struct cfg80211_beacon_registration *reg, *treg;
1389 unsigned long flags;
1390
1391 spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
1392 WARN_ON(!list_empty(&rdev->wiphy_work_list));
1393 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
1394 cancel_work_sync(&rdev->wiphy_work);
1395
1396 rfkill_destroy(rdev->wiphy.rfkill);
1397 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
1398 list_del(&reg->list);
1399 kfree(reg);
1400 }
1401 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
1402 cfg80211_put_bss(&rdev->wiphy, &scan->pub);
1403 mutex_destroy(&rdev->wiphy.mtx);
1404
1405 /*
1406 * The 'regd' can only be non-NULL if we never finished
1407 * initializing the wiphy and thus never went through the
1408 * unregister path - e.g. in failure scenarios. Thus, it
1409 * cannot have been visible to anyone if non-NULL, so we
1410 * can just free it here.
1411 */
1412 kfree(rcu_dereference_raw(rdev->wiphy.regd));
1413
1414 kfree(rdev);
1415}
1416
1417void wiphy_free(struct wiphy *wiphy)
1418{
1419 kfree(wiphy->radio_cfg);
1420 put_device(&wiphy->dev);
1421}
1422EXPORT_SYMBOL(wiphy_free);
1423
1424void wiphy_rfkill_set_hw_state_reason(struct wiphy *wiphy, bool blocked,
1425 enum rfkill_hard_block_reasons reason)
1426{
1427 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1428
1429 if (rfkill_set_hw_state_reason(wiphy->rfkill, blocked, reason))
1430 schedule_work(&rdev->rfkill_block);
1431}
1432EXPORT_SYMBOL(wiphy_rfkill_set_hw_state_reason);
1433
1434static void _cfg80211_unregister_wdev(struct wireless_dev *wdev,
1435 bool unregister_netdev)
1436{
1437 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1438 struct cfg80211_cqm_config *cqm_config;
1439 unsigned int link_id;
1440
1441 ASSERT_RTNL();
1442 lockdep_assert_held(&rdev->wiphy.mtx);
1443
1444 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE);
1445
1446 wdev->registered = false;
1447
1448 if (wdev->netdev) {
1449 sysfs_remove_link(&wdev->netdev->dev.kobj, "phy80211");
1450 if (unregister_netdev)
1451 unregister_netdevice(wdev->netdev);
1452 }
1453
1454 list_del_rcu(&wdev->list);
1455 synchronize_net();
1456 rdev->devlist_generation++;
1457 wiphy_work_cancel(wdev->wiphy, &wdev->disconnect_wk);
1458
1459 cfg80211_mlme_purge_registrations(wdev);
1460
1461 switch (wdev->iftype) {
1462 case NL80211_IFTYPE_P2P_DEVICE:
1463 cfg80211_stop_p2p_device(rdev, wdev);
1464 break;
1465 case NL80211_IFTYPE_NAN:
1466 cfg80211_stop_nan(rdev, wdev);
1467 break;
1468 case NL80211_IFTYPE_PD:
1469 cfg80211_stop_pd(rdev, wdev);
1470 break;
1471 default:
1472 break;
1473 }
1474
1475#ifdef CONFIG_CFG80211_WEXT
1476 kfree_sensitive(wdev->wext.keys);
1477 wdev->wext.keys = NULL;
1478#endif
1479 wiphy_work_cancel(wdev->wiphy, &wdev->cqm_rssi_work);
1480 /* deleted from the list, so can't be found from nl80211 any more */
1481 cqm_config = rcu_access_pointer(wdev->cqm_config);
1482 kfree_rcu(cqm_config, rcu_head);
1483 RCU_INIT_POINTER(wdev->cqm_config, NULL);
1484
1485 /*
1486 * Ensure that all events have been processed and
1487 * freed.
1488 */
1489 cfg80211_process_wdev_events(wdev);
1490
1491 if (wdev->iftype == NL80211_IFTYPE_STATION ||
1492 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) {
1493 for (link_id = 0; link_id < ARRAY_SIZE(wdev->links); link_id++) {
1494 struct cfg80211_internal_bss *curbss;
1495
1496 curbss = wdev->links[link_id].client.current_bss;
1497
1498 if (WARN_ON(curbss)) {
1499 cfg80211_unhold_bss(curbss);
1500 cfg80211_put_bss(wdev->wiphy, &curbss->pub);
1501 wdev->links[link_id].client.current_bss = NULL;
1502 }
1503 }
1504 }
1505
1506 wdev->connected = false;
1507}
1508
1509void cfg80211_unregister_wdev(struct wireless_dev *wdev)
1510{
1511 _cfg80211_unregister_wdev(wdev, true);
1512}
1513EXPORT_SYMBOL(cfg80211_unregister_wdev);
1514
1515static const struct device_type wiphy_type = {
1516 .name = "wlan",
1517};
1518
1519void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
1520 enum nl80211_iftype iftype, int num)
1521{
1522 lockdep_assert_held(&rdev->wiphy.mtx);
1523
1524 rdev->num_running_ifaces += num;
1525 if (iftype == NL80211_IFTYPE_MONITOR)
1526 rdev->num_running_monitor_ifaces += num;
1527}
1528
1529void cfg80211_leave_locked(struct cfg80211_registered_device *rdev,
1530 struct wireless_dev *wdev, int link_id)
1531{
1532 struct net_device *dev = wdev->netdev;
1533 struct cfg80211_sched_scan_request *pos, *tmp;
1534
1535 lockdep_assert_held(&rdev->wiphy.mtx);
1536
1537 cfg80211_pmsr_wdev_down(wdev);
1538
1539 cfg80211_stop_radar_detection(wdev);
1540 cfg80211_stop_background_radar_detection(wdev);
1541
1542 switch (wdev->iftype) {
1543 case NL80211_IFTYPE_ADHOC:
1544 cfg80211_leave_ibss(rdev, dev, true);
1545 break;
1546 case NL80211_IFTYPE_P2P_CLIENT:
1547 case NL80211_IFTYPE_STATION:
1548 list_for_each_entry_safe(pos, tmp, &rdev->sched_scan_req_list,
1549 list) {
1550 if (dev == pos->dev)
1551 cfg80211_stop_sched_scan_req(rdev, pos, false);
1552 }
1553
1554#ifdef CONFIG_CFG80211_WEXT
1555 kfree(wdev->wext.ie);
1556 wdev->wext.ie = NULL;
1557 wdev->wext.ie_len = 0;
1558 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1559#endif
1560 cfg80211_disconnect(rdev, dev,
1561 WLAN_REASON_DEAUTH_LEAVING, true);
1562 break;
1563 case NL80211_IFTYPE_MESH_POINT:
1564 cfg80211_leave_mesh(rdev, dev);
1565 break;
1566 case NL80211_IFTYPE_AP:
1567 case NL80211_IFTYPE_P2P_GO:
1568 cfg80211_stop_ap(rdev, dev, link_id, true);
1569 break;
1570 case NL80211_IFTYPE_OCB:
1571 cfg80211_leave_ocb(rdev, dev);
1572 break;
1573 case NL80211_IFTYPE_P2P_DEVICE:
1574 cfg80211_stop_p2p_device(rdev, wdev);
1575 break;
1576 case NL80211_IFTYPE_NAN:
1577 cfg80211_stop_nan(rdev, wdev);
1578 break;
1579 case NL80211_IFTYPE_PD:
1580 cfg80211_stop_pd(rdev, wdev);
1581 break;
1582 case NL80211_IFTYPE_AP_VLAN:
1583 case NL80211_IFTYPE_MONITOR:
1584 case NL80211_IFTYPE_NAN_DATA:
1585 /* nothing to do */
1586 break;
1587 case NL80211_IFTYPE_UNSPECIFIED:
1588 case NL80211_IFTYPE_WDS:
1589 case NUM_NL80211_IFTYPES:
1590 /* invalid */
1591 break;
1592 }
1593}
1594
1595void cfg80211_leave(struct cfg80211_registered_device *rdev,
1596 struct wireless_dev *wdev, int link_id)
1597{
1598 ASSERT_RTNL();
1599
1600 /* NAN_DATA interfaces must be closed before stopping NAN */
1601 cfg80211_close_dependents(rdev, wdev);
1602
1603 guard(wiphy)(&rdev->wiphy);
1604
1605 cfg80211_leave_locked(rdev, wdev, link_id);
1606}
1607
1608void cfg80211_stop_link(struct wiphy *wiphy, struct wireless_dev *wdev,
1609 int link_id, gfp_t gfp)
1610{
1611 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1612 struct cfg80211_event *ev;
1613 unsigned long flags;
1614
1615 /* Only AP/GO interfaces may have a specific link_id */
1616 if (WARN_ON_ONCE(link_id != -1 &&
1617 wdev->iftype != NL80211_IFTYPE_AP &&
1618 wdev->iftype != NL80211_IFTYPE_P2P_GO))
1619 link_id = -1;
1620
1621 trace_cfg80211_stop_link(wiphy, wdev, link_id);
1622
1623 if (wdev->iftype == NL80211_IFTYPE_NAN)
1624 return;
1625
1626 ev = kzalloc_obj(*ev, gfp);
1627 if (!ev)
1628 return;
1629
1630 ev->type = EVENT_STOPPED;
1631 ev->link_id = link_id;
1632
1633 spin_lock_irqsave(&wdev->event_lock, flags);
1634 list_add_tail(&ev->list, &wdev->event_list);
1635 spin_unlock_irqrestore(&wdev->event_lock, flags);
1636 queue_work(cfg80211_wq, &rdev->event_work);
1637}
1638EXPORT_SYMBOL(cfg80211_stop_link);
1639
1640void cfg80211_init_wdev(struct wireless_dev *wdev)
1641{
1642 INIT_LIST_HEAD(&wdev->event_list);
1643 spin_lock_init(&wdev->event_lock);
1644 INIT_LIST_HEAD(&wdev->mgmt_registrations);
1645 INIT_LIST_HEAD(&wdev->pmsr_list);
1646 spin_lock_init(&wdev->pmsr_lock);
1647 wiphy_work_init(&wdev->pmsr_free_wk, cfg80211_pmsr_free_wk);
1648
1649#ifdef CONFIG_CFG80211_WEXT
1650 wdev->wext.default_key = -1;
1651 wdev->wext.default_mgmt_key = -1;
1652 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1653#endif
1654
1655 wiphy_work_init(&wdev->cqm_rssi_work, cfg80211_cqm_rssi_notify_work);
1656
1657 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
1658 wdev->ps = true;
1659 else
1660 wdev->ps = false;
1661 /* allow mac80211 to determine the timeout */
1662 wdev->ps_timeout = -1;
1663
1664 wdev->radio_mask = BIT(wdev->wiphy->n_radio) - 1;
1665
1666 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1667 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
1668 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
1669 wdev->netdev->priv_flags |= IFF_DONT_BRIDGE;
1670
1671 wiphy_work_init(&wdev->disconnect_wk, cfg80211_autodisconnect_wk);
1672}
1673
1674void cfg80211_register_wdev(struct cfg80211_registered_device *rdev,
1675 struct wireless_dev *wdev)
1676{
1677 ASSERT_RTNL();
1678 lockdep_assert_held(&rdev->wiphy.mtx);
1679
1680 /*
1681 * We get here also when the interface changes network namespaces,
1682 * as it's registered into the new one, but we don't want it to
1683 * change ID in that case. Checking if the ID is already assigned
1684 * works, because 0 isn't considered a valid ID and the memory is
1685 * 0-initialized.
1686 */
1687 if (!wdev->identifier)
1688 wdev->identifier = ++rdev->wdev_id;
1689 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
1690 rdev->devlist_generation++;
1691 wdev->registered = true;
1692
1693 if (wdev->netdev &&
1694 sysfs_create_link(&wdev->netdev->dev.kobj, &rdev->wiphy.dev.kobj,
1695 "phy80211"))
1696 pr_err("failed to add phy80211 symlink to netdev!\n");
1697
1698 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
1699}
1700
1701int cfg80211_register_netdevice(struct net_device *dev)
1702{
1703 struct wireless_dev *wdev = dev->ieee80211_ptr;
1704 struct cfg80211_registered_device *rdev;
1705 int ret;
1706
1707 ASSERT_RTNL();
1708
1709 if (WARN_ON(!wdev))
1710 return -EINVAL;
1711
1712 rdev = wiphy_to_rdev(wdev->wiphy);
1713
1714 lockdep_assert_held(&rdev->wiphy.mtx);
1715
1716 /* we'll take care of this */
1717 wdev->registered = true;
1718 wdev->registering = true;
1719 ret = register_netdevice(dev);
1720 if (ret)
1721 goto out;
1722
1723 cfg80211_register_wdev(rdev, wdev);
1724 ret = 0;
1725out:
1726 wdev->registering = false;
1727 if (ret)
1728 wdev->registered = false;
1729 return ret;
1730}
1731EXPORT_SYMBOL(cfg80211_register_netdevice);
1732
1733static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
1734 unsigned long state, void *ptr)
1735{
1736 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1737 struct wireless_dev *wdev = dev->ieee80211_ptr;
1738 struct cfg80211_registered_device *rdev;
1739 struct cfg80211_sched_scan_request *pos, *tmp;
1740
1741 if (!wdev)
1742 return NOTIFY_DONE;
1743
1744 rdev = wiphy_to_rdev(wdev->wiphy);
1745
1746 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
1747
1748 switch (state) {
1749 case NETDEV_POST_INIT:
1750 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
1751 wdev->netdev = dev;
1752 /* can only change netns with wiphy */
1753 dev->netns_immutable = true;
1754
1755 cfg80211_init_wdev(wdev);
1756 break;
1757 case NETDEV_REGISTER:
1758 if (!wdev->registered) {
1759 guard(wiphy)(&rdev->wiphy);
1760
1761 cfg80211_register_wdev(rdev, wdev);
1762 }
1763 break;
1764 case NETDEV_UNREGISTER:
1765 /*
1766 * It is possible to get NETDEV_UNREGISTER multiple times,
1767 * so check wdev->registered.
1768 */
1769 if (wdev->registered && !wdev->registering) {
1770 guard(wiphy)(&rdev->wiphy);
1771
1772 _cfg80211_unregister_wdev(wdev, false);
1773 }
1774 break;
1775 case NETDEV_GOING_DOWN:
1776 cfg80211_leave(rdev, wdev, -1);
1777 scoped_guard(wiphy, &rdev->wiphy) {
1778 cfg80211_remove_links(wdev);
1779 /* since we just did cfg80211_leave() nothing to do there */
1780 wiphy_work_cancel(wdev->wiphy, &wdev->disconnect_wk);
1781 }
1782 break;
1783 case NETDEV_DOWN:
1784 wiphy_lock(&rdev->wiphy);
1785 cfg80211_update_iface_num(rdev, wdev->iftype, -1);
1786 if (rdev->scan_req && rdev->scan_req->req.wdev == wdev) {
1787 if (!rdev->scan_req->notified &&
1788 (!rdev->int_scan_req ||
1789 !rdev->int_scan_req->notified))
1790 rdev->scan_req->info.aborted = true;
1791 ___cfg80211_scan_done(rdev, false);
1792 }
1793
1794 list_for_each_entry_safe(pos, tmp,
1795 &rdev->sched_scan_req_list, list) {
1796 if (WARN_ON(pos->dev == wdev->netdev))
1797 cfg80211_stop_sched_scan_req(rdev, pos, false);
1798 }
1799
1800 rdev->opencount--;
1801 wiphy_unlock(&rdev->wiphy);
1802 wake_up(&rdev->dev_wait);
1803 break;
1804 case NETDEV_UP:
1805 wiphy_lock(&rdev->wiphy);
1806 cfg80211_update_iface_num(rdev, wdev->iftype, 1);
1807 switch (wdev->iftype) {
1808#ifdef CONFIG_CFG80211_WEXT
1809 case NL80211_IFTYPE_ADHOC:
1810 cfg80211_ibss_wext_join(rdev, wdev);
1811 break;
1812 case NL80211_IFTYPE_STATION:
1813 cfg80211_mgd_wext_connect(rdev, wdev);
1814 break;
1815#endif
1816#ifdef CONFIG_MAC80211_MESH
1817 case NL80211_IFTYPE_MESH_POINT:
1818 {
1819 /* backward compat code... */
1820 struct mesh_setup setup;
1821 memcpy(&setup, &default_mesh_setup,
1822 sizeof(setup));
1823 /* back compat only needed for mesh_id */
1824 setup.mesh_id = wdev->u.mesh.id;
1825 setup.mesh_id_len = wdev->u.mesh.id_up_len;
1826 if (wdev->u.mesh.id_up_len)
1827 __cfg80211_join_mesh(rdev, dev,
1828 &setup,
1829 &default_mesh_config);
1830 break;
1831 }
1832#endif
1833 default:
1834 break;
1835 }
1836 rdev->opencount++;
1837
1838 /*
1839 * Configure power management to the driver here so that its
1840 * correctly set also after interface type changes etc.
1841 */
1842 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1843 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
1844 rdev->ops->set_power_mgmt &&
1845 rdev_set_power_mgmt(rdev, dev, wdev->ps,
1846 wdev->ps_timeout)) {
1847 /* assume this means it's off */
1848 wdev->ps = false;
1849 }
1850 wiphy_unlock(&rdev->wiphy);
1851 break;
1852 case NETDEV_PRE_UP:
1853 if (!cfg80211_iftype_allowed(wdev->wiphy, wdev->iftype,
1854 wdev->use_4addr, 0))
1855 return notifier_from_errno(-EOPNOTSUPP);
1856
1857 if (rfkill_blocked(rdev->wiphy.rfkill))
1858 return notifier_from_errno(-ERFKILL);
1859
1860 /* NAN_DATA interfaces require a running NAN interface */
1861 if (wdev->iftype == NL80211_IFTYPE_NAN_DATA) {
1862 struct wireless_dev *iter;
1863 bool nan_started = false;
1864
1865 list_for_each_entry(iter, &rdev->wiphy.wdev_list, list) {
1866 if (iter->iftype == NL80211_IFTYPE_NAN &&
1867 wdev_running(iter)) {
1868 nan_started = true;
1869 break;
1870 }
1871 }
1872
1873 if (!nan_started)
1874 return notifier_from_errno(-ENOLINK);
1875 }
1876 break;
1877 default:
1878 return NOTIFY_DONE;
1879 }
1880
1881 wireless_nlevent_flush();
1882
1883 return NOTIFY_OK;
1884}
1885
1886static struct notifier_block cfg80211_netdev_notifier = {
1887 .notifier_call = cfg80211_netdev_notifier_call,
1888};
1889
1890static void __net_exit cfg80211_pernet_exit(struct net *net)
1891{
1892 struct cfg80211_registered_device *rdev;
1893
1894 rtnl_lock();
1895 for_each_rdev(rdev) {
1896 if (net_eq(wiphy_net(&rdev->wiphy), net))
1897 WARN_ON(__cfg80211_switch_netns(rdev, &init_net, true));
1898 }
1899 rtnl_unlock();
1900}
1901
1902static struct pernet_operations cfg80211_pernet_ops = {
1903 .exit = cfg80211_pernet_exit,
1904};
1905
1906void wiphy_work_queue(struct wiphy *wiphy, struct wiphy_work *work)
1907{
1908 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1909 unsigned long flags;
1910
1911 trace_wiphy_work_queue(wiphy, work);
1912
1913 spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
1914 if (list_empty(&work->entry))
1915 list_add_tail(&work->entry, &rdev->wiphy_work_list);
1916 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
1917
1918 queue_work(system_dfl_wq, &rdev->wiphy_work);
1919}
1920EXPORT_SYMBOL_GPL(wiphy_work_queue);
1921
1922void wiphy_work_cancel(struct wiphy *wiphy, struct wiphy_work *work)
1923{
1924 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1925 unsigned long flags;
1926
1927 lockdep_assert_held(&wiphy->mtx);
1928
1929 trace_wiphy_work_cancel(wiphy, work);
1930
1931 spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
1932 if (!list_empty(&work->entry))
1933 list_del_init(&work->entry);
1934 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
1935}
1936EXPORT_SYMBOL_GPL(wiphy_work_cancel);
1937
1938void wiphy_work_flush(struct wiphy *wiphy, struct wiphy_work *work)
1939{
1940 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1941 unsigned long flags;
1942 bool run;
1943
1944 trace_wiphy_work_flush(wiphy, work);
1945
1946 spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
1947 run = !work || !list_empty(&work->entry);
1948 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
1949
1950 if (run)
1951 cfg80211_process_wiphy_works(rdev, work);
1952}
1953EXPORT_SYMBOL_GPL(wiphy_work_flush);
1954
1955void wiphy_delayed_work_timer(struct timer_list *t)
1956{
1957 struct wiphy_delayed_work *dwork = timer_container_of(dwork, t, timer);
1958
1959 wiphy_work_queue(dwork->wiphy, &dwork->work);
1960}
1961EXPORT_SYMBOL(wiphy_delayed_work_timer);
1962
1963void wiphy_delayed_work_queue(struct wiphy *wiphy,
1964 struct wiphy_delayed_work *dwork,
1965 unsigned long delay)
1966{
1967 trace_wiphy_delayed_work_queue(wiphy, &dwork->work, delay);
1968
1969 if (!delay) {
1970 timer_delete(&dwork->timer);
1971 wiphy_work_queue(wiphy, &dwork->work);
1972 return;
1973 }
1974
1975 dwork->wiphy = wiphy;
1976 mod_timer(&dwork->timer, jiffies + delay);
1977}
1978EXPORT_SYMBOL_GPL(wiphy_delayed_work_queue);
1979
1980void wiphy_delayed_work_cancel(struct wiphy *wiphy,
1981 struct wiphy_delayed_work *dwork)
1982{
1983 lockdep_assert_held(&wiphy->mtx);
1984
1985 timer_delete_sync(&dwork->timer);
1986 wiphy_work_cancel(wiphy, &dwork->work);
1987}
1988EXPORT_SYMBOL_GPL(wiphy_delayed_work_cancel);
1989
1990void wiphy_delayed_work_flush(struct wiphy *wiphy,
1991 struct wiphy_delayed_work *dwork)
1992{
1993 lockdep_assert_held(&wiphy->mtx);
1994
1995 timer_delete_sync(&dwork->timer);
1996 wiphy_work_flush(wiphy, &dwork->work);
1997}
1998EXPORT_SYMBOL_GPL(wiphy_delayed_work_flush);
1999
2000bool wiphy_delayed_work_pending(struct wiphy *wiphy,
2001 struct wiphy_delayed_work *dwork)
2002{
2003 return timer_pending(&dwork->timer);
2004}
2005EXPORT_SYMBOL_GPL(wiphy_delayed_work_pending);
2006
2007enum hrtimer_restart wiphy_hrtimer_work_timer(struct hrtimer *t)
2008{
2009 struct wiphy_hrtimer_work *hrwork =
2010 container_of(t, struct wiphy_hrtimer_work, timer);
2011
2012 wiphy_work_queue(hrwork->wiphy, &hrwork->work);
2013
2014 return HRTIMER_NORESTART;
2015}
2016EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_timer);
2017
2018void wiphy_hrtimer_work_queue(struct wiphy *wiphy,
2019 struct wiphy_hrtimer_work *hrwork,
2020 ktime_t delay)
2021{
2022 trace_wiphy_hrtimer_work_queue(wiphy, &hrwork->work, delay);
2023
2024 if (!delay) {
2025 hrtimer_cancel(&hrwork->timer);
2026 wiphy_work_queue(wiphy, &hrwork->work);
2027 return;
2028 }
2029
2030 hrwork->wiphy = wiphy;
2031 hrtimer_start_range_ns(&hrwork->timer, delay,
2032 1000 * NSEC_PER_USEC, HRTIMER_MODE_REL);
2033}
2034EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_queue);
2035
2036void wiphy_hrtimer_work_cancel(struct wiphy *wiphy,
2037 struct wiphy_hrtimer_work *hrwork)
2038{
2039 lockdep_assert_held(&wiphy->mtx);
2040
2041 hrtimer_cancel(&hrwork->timer);
2042 wiphy_work_cancel(wiphy, &hrwork->work);
2043}
2044EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_cancel);
2045
2046void wiphy_hrtimer_work_flush(struct wiphy *wiphy,
2047 struct wiphy_hrtimer_work *hrwork)
2048{
2049 lockdep_assert_held(&wiphy->mtx);
2050
2051 hrtimer_cancel(&hrwork->timer);
2052 wiphy_work_flush(wiphy, &hrwork->work);
2053}
2054EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_flush);
2055
2056bool wiphy_hrtimer_work_pending(struct wiphy *wiphy,
2057 struct wiphy_hrtimer_work *hrwork)
2058{
2059 return hrtimer_is_queued(&hrwork->timer);
2060}
2061EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_pending);
2062
2063static int __init cfg80211_init(void)
2064{
2065 int err;
2066
2067 err = register_pernet_device(&cfg80211_pernet_ops);
2068 if (err)
2069 goto out_fail_pernet;
2070
2071 err = wiphy_sysfs_init();
2072 if (err)
2073 goto out_fail_sysfs;
2074
2075 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
2076 if (err)
2077 goto out_fail_notifier;
2078
2079 err = nl80211_init();
2080 if (err)
2081 goto out_fail_nl80211;
2082
2083 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
2084
2085 err = regulatory_init();
2086 if (err)
2087 goto out_fail_reg;
2088
2089 cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM);
2090 if (!cfg80211_wq) {
2091 err = -ENOMEM;
2092 goto out_fail_wq;
2093 }
2094
2095 return 0;
2096
2097out_fail_wq:
2098 regulatory_exit();
2099out_fail_reg:
2100 debugfs_remove(ieee80211_debugfs_dir);
2101 nl80211_exit();
2102out_fail_nl80211:
2103 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
2104out_fail_notifier:
2105 wiphy_sysfs_exit();
2106out_fail_sysfs:
2107 unregister_pernet_device(&cfg80211_pernet_ops);
2108out_fail_pernet:
2109 return err;
2110}
2111fs_initcall(cfg80211_init);
2112
2113static void __exit cfg80211_exit(void)
2114{
2115 debugfs_remove(ieee80211_debugfs_dir);
2116 nl80211_exit();
2117 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
2118 wiphy_sysfs_exit();
2119 regulatory_exit();
2120 unregister_pernet_device(&cfg80211_pernet_ops);
2121 destroy_workqueue(cfg80211_wq);
2122}
2123module_exit(cfg80211_exit);