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) 2018-2025 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 rdev_stop_p2p_device(rdev, wdev);
241 wdev->is_running = false;
242
243 rdev->opencount--;
244
245 if (rdev->scan_req && rdev->scan_req->req.wdev == wdev) {
246 if (WARN_ON(!rdev->scan_req->notified &&
247 (!rdev->int_scan_req ||
248 !rdev->int_scan_req->notified)))
249 rdev->scan_req->info.aborted = true;
250 ___cfg80211_scan_done(rdev, false);
251 }
252 }
253
cfg80211_stop_nan(struct cfg80211_registered_device * rdev,struct wireless_dev * wdev)254 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev,
255 struct wireless_dev *wdev)
256 {
257 lockdep_assert_held(&rdev->wiphy.mtx);
258
259 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_NAN))
260 return;
261
262 if (!wdev_running(wdev))
263 return;
264
265 rdev_stop_nan(rdev, wdev);
266 wdev->is_running = false;
267
268 eth_zero_addr(wdev->u.nan.cluster_id);
269
270 rdev->opencount--;
271 }
272
cfg80211_shutdown_all_interfaces(struct wiphy * wiphy)273 void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy)
274 {
275 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
276 struct wireless_dev *wdev;
277
278 ASSERT_RTNL();
279
280 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
281 if (wdev->netdev) {
282 dev_close(wdev->netdev);
283 continue;
284 }
285
286 /* otherwise, check iftype */
287
288 guard(wiphy)(wiphy);
289
290 switch (wdev->iftype) {
291 case NL80211_IFTYPE_P2P_DEVICE:
292 cfg80211_stop_p2p_device(rdev, wdev);
293 break;
294 case NL80211_IFTYPE_NAN:
295 cfg80211_stop_nan(rdev, wdev);
296 break;
297 default:
298 break;
299 }
300 }
301 }
302 EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces);
303
cfg80211_rfkill_set_block(void * data,bool blocked)304 static int cfg80211_rfkill_set_block(void *data, bool blocked)
305 {
306 struct cfg80211_registered_device *rdev = data;
307
308 if (!blocked)
309 return 0;
310
311 rtnl_lock();
312 cfg80211_shutdown_all_interfaces(&rdev->wiphy);
313 rtnl_unlock();
314
315 return 0;
316 }
317
cfg80211_rfkill_block_work(struct work_struct * work)318 static void cfg80211_rfkill_block_work(struct work_struct *work)
319 {
320 struct cfg80211_registered_device *rdev;
321
322 rdev = container_of(work, struct cfg80211_registered_device,
323 rfkill_block);
324 cfg80211_rfkill_set_block(rdev, true);
325 }
326
cfg80211_event_work(struct work_struct * work)327 static void cfg80211_event_work(struct work_struct *work)
328 {
329 struct cfg80211_registered_device *rdev;
330
331 rdev = container_of(work, struct cfg80211_registered_device,
332 event_work);
333
334 guard(wiphy)(&rdev->wiphy);
335
336 cfg80211_process_rdev_events(rdev);
337 }
338
cfg80211_destroy_ifaces(struct cfg80211_registered_device * rdev)339 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev)
340 {
341 struct wireless_dev *wdev, *tmp;
342
343 ASSERT_RTNL();
344
345 list_for_each_entry_safe(wdev, tmp, &rdev->wiphy.wdev_list, list) {
346 if (wdev->nl_owner_dead) {
347 if (wdev->netdev)
348 dev_close(wdev->netdev);
349
350 guard(wiphy)(&rdev->wiphy);
351
352 cfg80211_leave(rdev, wdev, -1);
353 cfg80211_remove_virtual_intf(rdev, wdev);
354 }
355 }
356 }
357
cfg80211_destroy_iface_wk(struct work_struct * work)358 static void cfg80211_destroy_iface_wk(struct work_struct *work)
359 {
360 struct cfg80211_registered_device *rdev;
361
362 rdev = container_of(work, struct cfg80211_registered_device,
363 destroy_work);
364
365 rtnl_lock();
366 cfg80211_destroy_ifaces(rdev);
367 rtnl_unlock();
368 }
369
cfg80211_sched_scan_stop_wk(struct wiphy * wiphy,struct wiphy_work * work)370 static void cfg80211_sched_scan_stop_wk(struct wiphy *wiphy,
371 struct wiphy_work *work)
372 {
373 struct cfg80211_registered_device *rdev;
374 struct cfg80211_sched_scan_request *req, *tmp;
375
376 rdev = container_of(work, struct cfg80211_registered_device,
377 sched_scan_stop_wk);
378
379 list_for_each_entry_safe(req, tmp, &rdev->sched_scan_req_list, list) {
380 if (req->nl_owner_dead)
381 cfg80211_stop_sched_scan_req(rdev, req, false);
382 }
383 }
384
cfg80211_propagate_radar_detect_wk(struct work_struct * work)385 static void cfg80211_propagate_radar_detect_wk(struct work_struct *work)
386 {
387 struct cfg80211_registered_device *rdev;
388
389 rdev = container_of(work, struct cfg80211_registered_device,
390 propagate_radar_detect_wk);
391
392 rtnl_lock();
393
394 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->radar_chandef,
395 NL80211_DFS_UNAVAILABLE,
396 NL80211_RADAR_DETECTED);
397
398 rtnl_unlock();
399 }
400
cfg80211_propagate_cac_done_wk(struct work_struct * work)401 static void cfg80211_propagate_cac_done_wk(struct work_struct *work)
402 {
403 struct cfg80211_registered_device *rdev;
404
405 rdev = container_of(work, struct cfg80211_registered_device,
406 propagate_cac_done_wk);
407
408 rtnl_lock();
409
410 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->cac_done_chandef,
411 NL80211_DFS_AVAILABLE,
412 NL80211_RADAR_CAC_FINISHED);
413
414 rtnl_unlock();
415 }
416
cfg80211_wiphy_work(struct work_struct * work)417 static void cfg80211_wiphy_work(struct work_struct *work)
418 {
419 struct cfg80211_registered_device *rdev;
420 struct wiphy_work *wk;
421
422 rdev = container_of(work, struct cfg80211_registered_device, wiphy_work);
423
424 trace_wiphy_work_worker_start(&rdev->wiphy);
425
426 guard(wiphy)(&rdev->wiphy);
427 if (rdev->suspended)
428 return;
429
430 spin_lock_irq(&rdev->wiphy_work_lock);
431 wk = list_first_entry_or_null(&rdev->wiphy_work_list,
432 struct wiphy_work, entry);
433 if (wk) {
434 list_del_init(&wk->entry);
435 if (!list_empty(&rdev->wiphy_work_list))
436 queue_work(system_dfl_wq, work);
437 spin_unlock_irq(&rdev->wiphy_work_lock);
438
439 trace_wiphy_work_run(&rdev->wiphy, wk);
440 wk->func(&rdev->wiphy, wk);
441 } else {
442 spin_unlock_irq(&rdev->wiphy_work_lock);
443 }
444 }
445
446 /* exported functions */
447
wiphy_new_nm(const struct cfg80211_ops * ops,int sizeof_priv,const char * requested_name)448 struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv,
449 const char *requested_name)
450 {
451 static atomic_t wiphy_counter = ATOMIC_INIT(0);
452
453 struct cfg80211_registered_device *rdev;
454 int alloc_size;
455
456 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
457 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
458 WARN_ON(ops->connect && !ops->disconnect);
459 WARN_ON(ops->join_ibss && !ops->leave_ibss);
460 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
461 WARN_ON(ops->add_station && !ops->del_station);
462 WARN_ON(ops->add_mpath && !ops->del_mpath);
463 WARN_ON(ops->join_mesh && !ops->leave_mesh);
464 WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device);
465 WARN_ON(ops->start_ap && !ops->stop_ap);
466 WARN_ON(ops->join_ocb && !ops->leave_ocb);
467 WARN_ON(ops->suspend && !ops->resume);
468 WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop);
469 WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel);
470 WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch);
471 WARN_ON(ops->add_tx_ts && !ops->del_tx_ts);
472
473 alloc_size = sizeof(*rdev) + sizeof_priv;
474
475 rdev = kzalloc(alloc_size, GFP_KERNEL);
476 if (!rdev)
477 return NULL;
478
479 rdev->ops = ops;
480
481 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter);
482
483 if (unlikely(rdev->wiphy_idx < 0)) {
484 /* ugh, wrapped! */
485 atomic_dec(&wiphy_counter);
486 kfree(rdev);
487 return NULL;
488 }
489
490 /* atomic_inc_return makes it start at 1, make it start at 0 */
491 rdev->wiphy_idx--;
492
493 /* give it a proper name */
494 if (requested_name && requested_name[0]) {
495 int rv;
496
497 rtnl_lock();
498 rv = cfg80211_dev_check_name(rdev, requested_name);
499
500 if (rv < 0) {
501 rtnl_unlock();
502 goto use_default_name;
503 }
504
505 rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name);
506 rtnl_unlock();
507 if (rv)
508 goto use_default_name;
509 } else {
510 int rv;
511
512 use_default_name:
513 /* NOTE: This is *probably* safe w/out holding rtnl because of
514 * the restrictions on phy names. Probably this call could
515 * fail if some other part of the kernel (re)named a device
516 * phyX. But, might should add some locking and check return
517 * value, and use a different name if this one exists?
518 */
519 rv = dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
520 if (rv < 0) {
521 kfree(rdev);
522 return NULL;
523 }
524 }
525
526 mutex_init(&rdev->wiphy.mtx);
527 INIT_LIST_HEAD(&rdev->wiphy.wdev_list);
528 INIT_LIST_HEAD(&rdev->beacon_registrations);
529 spin_lock_init(&rdev->beacon_registrations_lock);
530 spin_lock_init(&rdev->bss_lock);
531 INIT_LIST_HEAD(&rdev->bss_list);
532 INIT_LIST_HEAD(&rdev->sched_scan_req_list);
533 wiphy_work_init(&rdev->scan_done_wk, __cfg80211_scan_done);
534 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk,
535 cfg80211_dfs_channels_update_work);
536 #ifdef CONFIG_CFG80211_WEXT
537 rdev->wiphy.wext = &cfg80211_wext_handler;
538 #endif
539
540 device_initialize(&rdev->wiphy.dev);
541 rdev->wiphy.dev.class = &ieee80211_class;
542 rdev->wiphy.dev.platform_data = rdev;
543 device_enable_async_suspend(&rdev->wiphy.dev);
544
545 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk);
546 wiphy_work_init(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk);
547 INIT_WORK(&rdev->sched_scan_res_wk, cfg80211_sched_scan_results_wk);
548 INIT_WORK(&rdev->propagate_radar_detect_wk,
549 cfg80211_propagate_radar_detect_wk);
550 INIT_WORK(&rdev->propagate_cac_done_wk, cfg80211_propagate_cac_done_wk);
551 INIT_WORK(&rdev->mgmt_registrations_update_wk,
552 cfg80211_mgmt_registrations_update_wk);
553 spin_lock_init(&rdev->mgmt_registrations_lock);
554 INIT_WORK(&rdev->wiphy_work, cfg80211_wiphy_work);
555 INIT_LIST_HEAD(&rdev->wiphy_work_list);
556 spin_lock_init(&rdev->wiphy_work_lock);
557
558 #ifdef CONFIG_CFG80211_DEFAULT_PS
559 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
560 #endif
561
562 wiphy_net_set(&rdev->wiphy, &init_net);
563
564 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
565 rdev->wiphy.rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
566 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
567 &rdev->rfkill_ops, rdev);
568
569 if (!rdev->wiphy.rfkill) {
570 wiphy_free(&rdev->wiphy);
571 return NULL;
572 }
573
574 INIT_WORK(&rdev->rfkill_block, cfg80211_rfkill_block_work);
575 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
576 INIT_WORK(&rdev->event_work, cfg80211_event_work);
577 INIT_WORK(&rdev->background_cac_abort_wk,
578 cfg80211_background_cac_abort_wk);
579 INIT_DELAYED_WORK(&rdev->background_cac_done_wk,
580 cfg80211_background_cac_done_wk);
581
582 init_waitqueue_head(&rdev->dev_wait);
583
584 /*
585 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
586 * Fragmentation and RTS threshold are disabled by default with the
587 * special -1 value.
588 */
589 rdev->wiphy.retry_short = 7;
590 rdev->wiphy.retry_long = 4;
591 rdev->wiphy.frag_threshold = (u32) -1;
592 rdev->wiphy.rts_threshold = (u32) -1;
593 rdev->wiphy.coverage_class = 0;
594
595 rdev->wiphy.max_num_csa_counters = 1;
596
597 rdev->wiphy.max_sched_scan_plans = 1;
598 rdev->wiphy.max_sched_scan_plan_interval = U32_MAX;
599
600 return &rdev->wiphy;
601 }
602 EXPORT_SYMBOL(wiphy_new_nm);
603
604 static
wiphy_verify_iface_combinations(struct wiphy * wiphy,const struct ieee80211_iface_combination * iface_comb,int n_iface_comb,bool combined_radio)605 int wiphy_verify_iface_combinations(struct wiphy *wiphy,
606 const struct ieee80211_iface_combination *iface_comb,
607 int n_iface_comb,
608 bool combined_radio)
609 {
610 const struct ieee80211_iface_combination *c;
611 int i, j;
612
613 for (i = 0; i < n_iface_comb; i++) {
614 u32 cnt = 0;
615 u16 all_iftypes = 0;
616
617 c = &iface_comb[i];
618
619 /*
620 * Combinations with just one interface aren't real,
621 * however we make an exception for DFS.
622 */
623 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths))
624 return -EINVAL;
625
626 /* Need at least one channel */
627 if (WARN_ON(!c->num_different_channels))
628 return -EINVAL;
629
630 /* DFS only works on one channel. Avoid this check
631 * for multi-radio global combination, since it hold
632 * the capabilities of all radio combinations.
633 */
634 if (!combined_radio &&
635 WARN_ON(c->radar_detect_widths &&
636 c->num_different_channels > 1))
637 return -EINVAL;
638
639 if (WARN_ON(!c->n_limits))
640 return -EINVAL;
641
642 for (j = 0; j < c->n_limits; j++) {
643 u16 types = c->limits[j].types;
644
645 /* interface types shouldn't overlap */
646 if (WARN_ON(types & all_iftypes))
647 return -EINVAL;
648 all_iftypes |= types;
649
650 if (WARN_ON(!c->limits[j].max))
651 return -EINVAL;
652
653 /* Shouldn't list software iftypes in combinations! */
654 if (WARN_ON(wiphy->software_iftypes & types))
655 return -EINVAL;
656
657 /* Only a single P2P_DEVICE can be allowed, avoid this
658 * check for multi-radio global combination, since it
659 * hold the capabilities of all radio combinations.
660 */
661 if (!combined_radio &&
662 WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) &&
663 c->limits[j].max > 1))
664 return -EINVAL;
665
666 /* Only a single NAN can be allowed */
667 if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) &&
668 c->limits[j].max > 1))
669 return -EINVAL;
670
671 /*
672 * This isn't well-defined right now. If you have an
673 * IBSS interface, then its beacon interval may change
674 * by joining other networks, and nothing prevents it
675 * from doing that.
676 * So technically we probably shouldn't even allow AP
677 * and IBSS in the same interface, but it seems that
678 * some drivers support that, possibly only with fixed
679 * beacon intervals for IBSS.
680 */
681 if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) &&
682 c->beacon_int_min_gcd)) {
683 return -EINVAL;
684 }
685
686 cnt += c->limits[j].max;
687 /*
688 * Don't advertise an unsupported type
689 * in a combination.
690 */
691 if (WARN_ON((wiphy->interface_modes & types) != types))
692 return -EINVAL;
693 }
694
695 if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS)))
696 return -EINVAL;
697
698 /* You can't even choose that many! */
699 if (WARN_ON(cnt < c->max_interfaces))
700 return -EINVAL;
701 }
702
703 return 0;
704 }
705
wiphy_verify_combinations(struct wiphy * wiphy)706 static int wiphy_verify_combinations(struct wiphy *wiphy)
707 {
708 int i, ret;
709 bool combined_radio = false;
710
711 if (wiphy->n_radio) {
712 for (i = 0; i < wiphy->n_radio; i++) {
713 const struct wiphy_radio *radio = &wiphy->radio[i];
714
715 ret = wiphy_verify_iface_combinations(wiphy,
716 radio->iface_combinations,
717 radio->n_iface_combinations,
718 false);
719 if (ret)
720 return ret;
721 }
722
723 combined_radio = true;
724 }
725
726 ret = wiphy_verify_iface_combinations(wiphy,
727 wiphy->iface_combinations,
728 wiphy->n_iface_combinations,
729 combined_radio);
730
731 return ret;
732 }
733
wiphy_register(struct wiphy * wiphy)734 int wiphy_register(struct wiphy *wiphy)
735 {
736 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
737 int res;
738 enum nl80211_band band;
739 struct ieee80211_supported_band *sband;
740 bool have_band = false;
741 int i;
742 u16 ifmodes = wiphy->interface_modes;
743
744 #ifdef CONFIG_PM
745 if (WARN_ON(wiphy->wowlan &&
746 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
747 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
748 return -EINVAL;
749 if (WARN_ON(wiphy->wowlan &&
750 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns &&
751 !wiphy->wowlan->tcp))
752 return -EINVAL;
753 #endif
754 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
755 (!rdev->ops->tdls_channel_switch ||
756 !rdev->ops->tdls_cancel_channel_switch)))
757 return -EINVAL;
758
759 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) &&
760 (!rdev->ops->start_nan || !rdev->ops->stop_nan ||
761 !rdev->ops->add_nan_func || !rdev->ops->del_nan_func ||
762 !(wiphy->nan_supported_bands & BIT(NL80211_BAND_2GHZ)))))
763 return -EINVAL;
764
765 if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)))
766 return -EINVAL;
767
768 if (WARN_ON(wiphy->pmsr_capa && !wiphy->pmsr_capa->ftm.supported))
769 return -EINVAL;
770
771 if (wiphy->pmsr_capa && wiphy->pmsr_capa->ftm.supported) {
772 if (WARN_ON(!wiphy->pmsr_capa->ftm.asap &&
773 !wiphy->pmsr_capa->ftm.non_asap))
774 return -EINVAL;
775 if (WARN_ON(!wiphy->pmsr_capa->ftm.preambles ||
776 !wiphy->pmsr_capa->ftm.bandwidths))
777 return -EINVAL;
778 if (WARN_ON(wiphy->pmsr_capa->ftm.preambles &
779 ~(BIT(NL80211_PREAMBLE_LEGACY) |
780 BIT(NL80211_PREAMBLE_HT) |
781 BIT(NL80211_PREAMBLE_VHT) |
782 BIT(NL80211_PREAMBLE_HE) |
783 BIT(NL80211_PREAMBLE_DMG))))
784 return -EINVAL;
785 if (WARN_ON((wiphy->pmsr_capa->ftm.trigger_based ||
786 wiphy->pmsr_capa->ftm.non_trigger_based) &&
787 !(wiphy->pmsr_capa->ftm.preambles &
788 BIT(NL80211_PREAMBLE_HE))))
789 return -EINVAL;
790 if (WARN_ON(wiphy->pmsr_capa->ftm.bandwidths &
791 ~(BIT(NL80211_CHAN_WIDTH_20_NOHT) |
792 BIT(NL80211_CHAN_WIDTH_20) |
793 BIT(NL80211_CHAN_WIDTH_40) |
794 BIT(NL80211_CHAN_WIDTH_80) |
795 BIT(NL80211_CHAN_WIDTH_80P80) |
796 BIT(NL80211_CHAN_WIDTH_160) |
797 BIT(NL80211_CHAN_WIDTH_320) |
798 BIT(NL80211_CHAN_WIDTH_5) |
799 BIT(NL80211_CHAN_WIDTH_10))))
800 return -EINVAL;
801 }
802
803 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) &&
804 (wiphy->regulatory_flags &
805 (REGULATORY_CUSTOM_REG |
806 REGULATORY_STRICT_REG |
807 REGULATORY_COUNTRY_IE_FOLLOW_POWER |
808 REGULATORY_COUNTRY_IE_IGNORE))))
809 return -EINVAL;
810
811 if (WARN_ON(wiphy->coalesce &&
812 (!wiphy->coalesce->n_rules ||
813 !wiphy->coalesce->n_patterns) &&
814 (!wiphy->coalesce->pattern_min_len ||
815 wiphy->coalesce->pattern_min_len >
816 wiphy->coalesce->pattern_max_len)))
817 return -EINVAL;
818
819 if (WARN_ON(wiphy->ap_sme_capa &&
820 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
821 return -EINVAL;
822
823 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
824 return -EINVAL;
825
826 if (WARN_ON(wiphy->addresses &&
827 !is_zero_ether_addr(wiphy->perm_addr) &&
828 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
829 ETH_ALEN)))
830 return -EINVAL;
831
832 if (WARN_ON(wiphy->max_acl_mac_addrs &&
833 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) ||
834 !rdev->ops->set_mac_acl)))
835 return -EINVAL;
836
837 /* assure only valid behaviours are flagged by driver
838 * hence subtract 2 as bit 0 is invalid.
839 */
840 if (WARN_ON(wiphy->bss_select_support &&
841 (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2))))
842 return -EINVAL;
843
844 if (WARN_ON(wiphy_ext_feature_isset(&rdev->wiphy,
845 NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X) &&
846 (!rdev->ops->set_pmk || !rdev->ops->del_pmk)))
847 return -EINVAL;
848
849 if (WARN_ON(!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
850 rdev->ops->update_connect_params))
851 return -EINVAL;
852
853 if (wiphy->addresses)
854 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
855
856 /* sanity check ifmodes */
857 WARN_ON(!ifmodes);
858 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
859 if (WARN_ON(ifmodes != wiphy->interface_modes))
860 wiphy->interface_modes = ifmodes;
861
862 res = wiphy_verify_combinations(wiphy);
863 if (res)
864 return res;
865
866 /* sanity check supported bands/channels */
867 for (band = 0; band < NUM_NL80211_BANDS; band++) {
868 const struct ieee80211_sband_iftype_data *iftd;
869 u16 types = 0;
870 bool have_he = false;
871
872 sband = wiphy->bands[band];
873 if (!sband)
874 continue;
875
876 sband->band = band;
877 if (WARN_ON(!sband->n_channels))
878 return -EINVAL;
879 /*
880 * on 60GHz or sub-1Ghz band, there are no legacy rates, so
881 * n_bitrates is 0
882 */
883 if (WARN_ON((band != NL80211_BAND_60GHZ &&
884 band != NL80211_BAND_S1GHZ) &&
885 !sband->n_bitrates))
886 return -EINVAL;
887
888 if (WARN_ON(band == NL80211_BAND_6GHZ &&
889 (sband->ht_cap.ht_supported ||
890 sband->vht_cap.vht_supported)))
891 return -EINVAL;
892
893 /*
894 * Since cfg80211_disable_40mhz_24ghz is global, we can
895 * modify the sband's ht data even if the driver uses a
896 * global structure for that.
897 */
898 if (cfg80211_disable_40mhz_24ghz &&
899 band == NL80211_BAND_2GHZ &&
900 sband->ht_cap.ht_supported) {
901 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
902 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
903 }
904
905 /*
906 * Since we use a u32 for rate bitmaps in
907 * ieee80211_get_response_rate, we cannot
908 * have more than 32 legacy rates.
909 */
910 if (WARN_ON(sband->n_bitrates > 32))
911 return -EINVAL;
912
913 for (i = 0; i < sband->n_channels; i++) {
914 sband->channels[i].orig_flags =
915 sband->channels[i].flags;
916 sband->channels[i].orig_mag = INT_MAX;
917 sband->channels[i].orig_mpwr =
918 sband->channels[i].max_power;
919 sband->channels[i].band = band;
920
921 if (WARN_ON(sband->channels[i].freq_offset >= 1000))
922 return -EINVAL;
923 }
924
925 for_each_sband_iftype_data(sband, i, iftd) {
926 bool has_ap, has_non_ap;
927 u32 ap_bits = BIT(NL80211_IFTYPE_AP) |
928 BIT(NL80211_IFTYPE_P2P_GO);
929
930 if (WARN_ON(!iftd->types_mask))
931 return -EINVAL;
932 if (WARN_ON(types & iftd->types_mask))
933 return -EINVAL;
934
935 /* at least one piece of information must be present */
936 if (WARN_ON(!iftd->he_cap.has_he))
937 return -EINVAL;
938
939 types |= iftd->types_mask;
940
941 if (i == 0)
942 have_he = iftd->he_cap.has_he;
943 else
944 have_he = have_he &&
945 iftd->he_cap.has_he;
946
947 has_ap = iftd->types_mask & ap_bits;
948 has_non_ap = iftd->types_mask & ~ap_bits;
949
950 /*
951 * For EHT 20 MHz STA, the capabilities format differs
952 * but to simplify, don't check 20 MHz but rather check
953 * only if AP and non-AP were mentioned at the same time,
954 * reject if so.
955 */
956 if (WARN_ON(iftd->eht_cap.has_eht &&
957 has_ap && has_non_ap))
958 return -EINVAL;
959 }
960
961 if (WARN_ON(!have_he && band == NL80211_BAND_6GHZ))
962 return -EINVAL;
963
964 have_band = true;
965 }
966
967 if (!have_band) {
968 WARN_ON(1);
969 return -EINVAL;
970 }
971
972 for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
973 /*
974 * Validate we have a policy (can be explicitly set to
975 * VENDOR_CMD_RAW_DATA which is non-NULL) and also that
976 * we have at least one of doit/dumpit.
977 */
978 if (WARN_ON(!rdev->wiphy.vendor_commands[i].policy))
979 return -EINVAL;
980 if (WARN_ON(!rdev->wiphy.vendor_commands[i].doit &&
981 !rdev->wiphy.vendor_commands[i].dumpit))
982 return -EINVAL;
983 }
984
985 #ifdef CONFIG_PM
986 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns &&
987 (!rdev->wiphy.wowlan->pattern_min_len ||
988 rdev->wiphy.wowlan->pattern_min_len >
989 rdev->wiphy.wowlan->pattern_max_len)))
990 return -EINVAL;
991 #endif
992
993 if (!wiphy->max_num_akm_suites)
994 wiphy->max_num_akm_suites = NL80211_MAX_NR_AKM_SUITES;
995 else if (wiphy->max_num_akm_suites < NL80211_MAX_NR_AKM_SUITES ||
996 wiphy->max_num_akm_suites > CFG80211_MAX_NUM_AKM_SUITES)
997 return -EINVAL;
998
999 /* Allocate radio configuration space for multi-radio wiphy */
1000 if (wiphy->n_radio > 0) {
1001 int idx;
1002
1003 wiphy->radio_cfg = kzalloc_objs(*wiphy->radio_cfg,
1004 wiphy->n_radio);
1005 if (!wiphy->radio_cfg)
1006 return -ENOMEM;
1007 /*
1008 * Initialize wiphy radio parameters to IEEE 802.11
1009 * MIB default values. RTS threshold is disabled by
1010 * default with the special -1 value.
1011 */
1012 for (idx = 0; idx < wiphy->n_radio; idx++)
1013 wiphy->radio_cfg[idx].rts_threshold = (u32)-1;
1014 }
1015
1016 /* check and set up bitrates */
1017 ieee80211_set_bitrate_flags(wiphy);
1018
1019 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH;
1020
1021 if (rdev->wiphy.bss_param_support & WIPHY_BSS_PARAM_P2P_CTWINDOW)
1022 rdev->wiphy.features |= NL80211_FEATURE_P2P_GO_CTWIN;
1023 else if (rdev->wiphy.features & NL80211_FEATURE_P2P_GO_CTWIN)
1024 rdev->wiphy.bss_param_support |= WIPHY_BSS_PARAM_P2P_CTWINDOW;
1025 if (rdev->wiphy.bss_param_support & WIPHY_BSS_PARAM_P2P_OPPPS)
1026 rdev->wiphy.features |= NL80211_FEATURE_P2P_GO_OPPPS;
1027 else if (rdev->wiphy.features & NL80211_FEATURE_P2P_GO_OPPPS)
1028 rdev->wiphy.bss_param_support |= WIPHY_BSS_PARAM_P2P_OPPPS;
1029
1030 rtnl_lock();
1031 wiphy_lock(&rdev->wiphy);
1032 res = device_add(&rdev->wiphy.dev);
1033 if (res) {
1034 wiphy_unlock(&rdev->wiphy);
1035 rtnl_unlock();
1036 return res;
1037 }
1038
1039 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
1040 cfg80211_rdev_list_generation++;
1041
1042 /* add to debugfs */
1043 rdev->wiphy.debugfsdir = debugfs_create_dir(wiphy_name(&rdev->wiphy),
1044 ieee80211_debugfs_dir);
1045 if (wiphy->n_radio > 0) {
1046 int idx;
1047 char radio_name[RADIO_DEBUGFSDIR_MAX_LEN];
1048
1049 for (idx = 0; idx < wiphy->n_radio; idx++) {
1050 scnprintf(radio_name, sizeof(radio_name), "radio%d",
1051 idx);
1052 wiphy->radio_cfg[idx].radio_debugfsdir =
1053 debugfs_create_dir(radio_name,
1054 rdev->wiphy.debugfsdir);
1055 }
1056 }
1057
1058 cfg80211_debugfs_rdev_add(rdev);
1059 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
1060 wiphy_unlock(&rdev->wiphy);
1061
1062 /* set up regulatory info */
1063 wiphy_regulatory_register(wiphy);
1064
1065 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
1066 struct regulatory_request request = {
1067 .wiphy_idx = get_wiphy_idx(wiphy),
1068 .initiator = NL80211_REGDOM_SET_BY_DRIVER,
1069 .alpha2[0] = '9',
1070 .alpha2[1] = '9',
1071 };
1072
1073 nl80211_send_reg_change_event(&request);
1074 }
1075
1076 /* Check that nobody globally advertises any capabilities they do not
1077 * advertise on all possible interface types.
1078 */
1079 if (wiphy->extended_capabilities_len &&
1080 wiphy->num_iftype_ext_capab &&
1081 wiphy->iftype_ext_capab) {
1082 u8 supported_on_all, j;
1083 const struct wiphy_iftype_ext_capab *capab;
1084
1085 capab = wiphy->iftype_ext_capab;
1086 for (j = 0; j < wiphy->extended_capabilities_len; j++) {
1087 if (capab[0].extended_capabilities_len > j)
1088 supported_on_all =
1089 capab[0].extended_capabilities[j];
1090 else
1091 supported_on_all = 0x00;
1092 for (i = 1; i < wiphy->num_iftype_ext_capab; i++) {
1093 if (j >= capab[i].extended_capabilities_len) {
1094 supported_on_all = 0x00;
1095 break;
1096 }
1097 supported_on_all &=
1098 capab[i].extended_capabilities[j];
1099 }
1100 if (WARN_ON(wiphy->extended_capabilities[j] &
1101 ~supported_on_all))
1102 break;
1103 }
1104 }
1105
1106 rdev->wiphy.registered = true;
1107 rtnl_unlock();
1108
1109 res = rfkill_register(rdev->wiphy.rfkill);
1110 if (res) {
1111 rfkill_destroy(rdev->wiphy.rfkill);
1112 rdev->wiphy.rfkill = NULL;
1113 wiphy_unregister(&rdev->wiphy);
1114 return res;
1115 }
1116
1117 return 0;
1118 }
1119 EXPORT_SYMBOL(wiphy_register);
1120
wiphy_rfkill_start_polling(struct wiphy * wiphy)1121 void wiphy_rfkill_start_polling(struct wiphy *wiphy)
1122 {
1123 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1124
1125 if (!rdev->ops->rfkill_poll)
1126 return;
1127 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
1128 rfkill_resume_polling(wiphy->rfkill);
1129 }
1130 EXPORT_SYMBOL(wiphy_rfkill_start_polling);
1131
cfg80211_process_wiphy_works(struct cfg80211_registered_device * rdev,struct wiphy_work * end)1132 void cfg80211_process_wiphy_works(struct cfg80211_registered_device *rdev,
1133 struct wiphy_work *end)
1134 {
1135 unsigned int runaway_limit = 100;
1136 unsigned long flags;
1137
1138 lockdep_assert_held(&rdev->wiphy.mtx);
1139
1140 spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
1141 while (!list_empty(&rdev->wiphy_work_list)) {
1142 struct wiphy_work *wk;
1143
1144 wk = list_first_entry(&rdev->wiphy_work_list,
1145 struct wiphy_work, entry);
1146 list_del_init(&wk->entry);
1147 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
1148
1149 trace_wiphy_work_run(&rdev->wiphy, wk);
1150 wk->func(&rdev->wiphy, wk);
1151
1152 spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
1153
1154 if (wk == end)
1155 break;
1156
1157 if (WARN_ON(--runaway_limit == 0))
1158 INIT_LIST_HEAD(&rdev->wiphy_work_list);
1159 }
1160 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
1161 }
1162
wiphy_unregister(struct wiphy * wiphy)1163 void wiphy_unregister(struct wiphy *wiphy)
1164 {
1165 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1166
1167 wait_event(rdev->dev_wait, ({
1168 int __count;
1169 wiphy_lock(&rdev->wiphy);
1170 __count = rdev->opencount;
1171 wiphy_unlock(&rdev->wiphy);
1172 __count == 0; }));
1173
1174 if (rdev->wiphy.rfkill)
1175 rfkill_unregister(rdev->wiphy.rfkill);
1176
1177 rtnl_lock();
1178 wiphy_lock(&rdev->wiphy);
1179 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
1180 rdev->wiphy.registered = false;
1181
1182 WARN_ON(!list_empty(&rdev->wiphy.wdev_list));
1183
1184 /*
1185 * First remove the hardware from everywhere, this makes
1186 * it impossible to find from userspace.
1187 */
1188 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
1189 list_del_rcu(&rdev->list);
1190 synchronize_rcu();
1191
1192 /*
1193 * If this device got a regulatory hint tell core its
1194 * free to listen now to a new shiny device regulatory hint
1195 */
1196 wiphy_regulatory_deregister(wiphy);
1197
1198 cfg80211_rdev_list_generation++;
1199 device_del(&rdev->wiphy.dev);
1200
1201 #ifdef CONFIG_PM
1202 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
1203 rdev_set_wakeup(rdev, false);
1204 #endif
1205
1206 /* surely nothing is reachable now, clean up work */
1207 cfg80211_process_wiphy_works(rdev, NULL);
1208 wiphy_unlock(&rdev->wiphy);
1209 rtnl_unlock();
1210
1211 /* this has nothing to do now but make sure it's gone */
1212 cancel_work_sync(&rdev->wiphy_work);
1213
1214 cancel_work_sync(&rdev->rfkill_block);
1215 cancel_work_sync(&rdev->conn_work);
1216 flush_work(&rdev->event_work);
1217 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
1218 cancel_delayed_work_sync(&rdev->background_cac_done_wk);
1219 flush_work(&rdev->destroy_work);
1220 flush_work(&rdev->propagate_radar_detect_wk);
1221 flush_work(&rdev->propagate_cac_done_wk);
1222 flush_work(&rdev->mgmt_registrations_update_wk);
1223 flush_work(&rdev->background_cac_abort_wk);
1224
1225 cfg80211_rdev_free_wowlan(rdev);
1226 cfg80211_free_coalesce(rdev->coalesce);
1227 rdev->coalesce = NULL;
1228 }
1229 EXPORT_SYMBOL(wiphy_unregister);
1230
cfg80211_dev_free(struct cfg80211_registered_device * rdev)1231 void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
1232 {
1233 struct cfg80211_internal_bss *scan, *tmp;
1234 struct cfg80211_beacon_registration *reg, *treg;
1235 unsigned long flags;
1236
1237 spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
1238 WARN_ON(!list_empty(&rdev->wiphy_work_list));
1239 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
1240 cancel_work_sync(&rdev->wiphy_work);
1241
1242 rfkill_destroy(rdev->wiphy.rfkill);
1243 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
1244 list_del(®->list);
1245 kfree(reg);
1246 }
1247 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
1248 cfg80211_put_bss(&rdev->wiphy, &scan->pub);
1249 mutex_destroy(&rdev->wiphy.mtx);
1250
1251 /*
1252 * The 'regd' can only be non-NULL if we never finished
1253 * initializing the wiphy and thus never went through the
1254 * unregister path - e.g. in failure scenarios. Thus, it
1255 * cannot have been visible to anyone if non-NULL, so we
1256 * can just free it here.
1257 */
1258 kfree(rcu_dereference_raw(rdev->wiphy.regd));
1259
1260 kfree(rdev);
1261 }
1262
wiphy_free(struct wiphy * wiphy)1263 void wiphy_free(struct wiphy *wiphy)
1264 {
1265 kfree(wiphy->radio_cfg);
1266 put_device(&wiphy->dev);
1267 }
1268 EXPORT_SYMBOL(wiphy_free);
1269
wiphy_rfkill_set_hw_state_reason(struct wiphy * wiphy,bool blocked,enum rfkill_hard_block_reasons reason)1270 void wiphy_rfkill_set_hw_state_reason(struct wiphy *wiphy, bool blocked,
1271 enum rfkill_hard_block_reasons reason)
1272 {
1273 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1274
1275 if (rfkill_set_hw_state_reason(wiphy->rfkill, blocked, reason))
1276 schedule_work(&rdev->rfkill_block);
1277 }
1278 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state_reason);
1279
_cfg80211_unregister_wdev(struct wireless_dev * wdev,bool unregister_netdev)1280 static void _cfg80211_unregister_wdev(struct wireless_dev *wdev,
1281 bool unregister_netdev)
1282 {
1283 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1284 struct cfg80211_cqm_config *cqm_config;
1285 unsigned int link_id;
1286
1287 ASSERT_RTNL();
1288 lockdep_assert_held(&rdev->wiphy.mtx);
1289
1290 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE);
1291
1292 wdev->registered = false;
1293
1294 if (wdev->netdev) {
1295 sysfs_remove_link(&wdev->netdev->dev.kobj, "phy80211");
1296 if (unregister_netdev)
1297 unregister_netdevice(wdev->netdev);
1298 }
1299
1300 list_del_rcu(&wdev->list);
1301 synchronize_net();
1302 rdev->devlist_generation++;
1303
1304 cfg80211_mlme_purge_registrations(wdev);
1305
1306 switch (wdev->iftype) {
1307 case NL80211_IFTYPE_P2P_DEVICE:
1308 cfg80211_stop_p2p_device(rdev, wdev);
1309 break;
1310 case NL80211_IFTYPE_NAN:
1311 cfg80211_stop_nan(rdev, wdev);
1312 break;
1313 default:
1314 break;
1315 }
1316
1317 #ifdef CONFIG_CFG80211_WEXT
1318 kfree_sensitive(wdev->wext.keys);
1319 wdev->wext.keys = NULL;
1320 #endif
1321 wiphy_work_cancel(wdev->wiphy, &wdev->cqm_rssi_work);
1322 /* deleted from the list, so can't be found from nl80211 any more */
1323 cqm_config = rcu_access_pointer(wdev->cqm_config);
1324 kfree_rcu(cqm_config, rcu_head);
1325 RCU_INIT_POINTER(wdev->cqm_config, NULL);
1326
1327 /*
1328 * Ensure that all events have been processed and
1329 * freed.
1330 */
1331 cfg80211_process_wdev_events(wdev);
1332
1333 if (wdev->iftype == NL80211_IFTYPE_STATION ||
1334 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) {
1335 for (link_id = 0; link_id < ARRAY_SIZE(wdev->links); link_id++) {
1336 struct cfg80211_internal_bss *curbss;
1337
1338 curbss = wdev->links[link_id].client.current_bss;
1339
1340 if (WARN_ON(curbss)) {
1341 cfg80211_unhold_bss(curbss);
1342 cfg80211_put_bss(wdev->wiphy, &curbss->pub);
1343 wdev->links[link_id].client.current_bss = NULL;
1344 }
1345 }
1346 }
1347
1348 wdev->connected = false;
1349 }
1350
cfg80211_unregister_wdev(struct wireless_dev * wdev)1351 void cfg80211_unregister_wdev(struct wireless_dev *wdev)
1352 {
1353 _cfg80211_unregister_wdev(wdev, true);
1354 }
1355 EXPORT_SYMBOL(cfg80211_unregister_wdev);
1356
1357 static const struct device_type wiphy_type = {
1358 .name = "wlan",
1359 };
1360
cfg80211_update_iface_num(struct cfg80211_registered_device * rdev,enum nl80211_iftype iftype,int num)1361 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
1362 enum nl80211_iftype iftype, int num)
1363 {
1364 lockdep_assert_held(&rdev->wiphy.mtx);
1365
1366 rdev->num_running_ifaces += num;
1367 if (iftype == NL80211_IFTYPE_MONITOR)
1368 rdev->num_running_monitor_ifaces += num;
1369 }
1370
cfg80211_leave(struct cfg80211_registered_device * rdev,struct wireless_dev * wdev,int link_id)1371 void cfg80211_leave(struct cfg80211_registered_device *rdev,
1372 struct wireless_dev *wdev,
1373 int link_id)
1374 {
1375 struct net_device *dev = wdev->netdev;
1376 struct cfg80211_sched_scan_request *pos, *tmp;
1377
1378 lockdep_assert_held(&rdev->wiphy.mtx);
1379
1380 cfg80211_pmsr_wdev_down(wdev);
1381
1382 cfg80211_stop_radar_detection(wdev);
1383 cfg80211_stop_background_radar_detection(wdev);
1384
1385 switch (wdev->iftype) {
1386 case NL80211_IFTYPE_ADHOC:
1387 cfg80211_leave_ibss(rdev, dev, true);
1388 break;
1389 case NL80211_IFTYPE_P2P_CLIENT:
1390 case NL80211_IFTYPE_STATION:
1391 list_for_each_entry_safe(pos, tmp, &rdev->sched_scan_req_list,
1392 list) {
1393 if (dev == pos->dev)
1394 cfg80211_stop_sched_scan_req(rdev, pos, false);
1395 }
1396
1397 #ifdef CONFIG_CFG80211_WEXT
1398 kfree(wdev->wext.ie);
1399 wdev->wext.ie = NULL;
1400 wdev->wext.ie_len = 0;
1401 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1402 #endif
1403 cfg80211_disconnect(rdev, dev,
1404 WLAN_REASON_DEAUTH_LEAVING, true);
1405 break;
1406 case NL80211_IFTYPE_MESH_POINT:
1407 cfg80211_leave_mesh(rdev, dev);
1408 break;
1409 case NL80211_IFTYPE_AP:
1410 case NL80211_IFTYPE_P2P_GO:
1411 cfg80211_stop_ap(rdev, dev, link_id, true);
1412 break;
1413 case NL80211_IFTYPE_OCB:
1414 cfg80211_leave_ocb(rdev, dev);
1415 break;
1416 case NL80211_IFTYPE_P2P_DEVICE:
1417 cfg80211_stop_p2p_device(rdev, wdev);
1418 break;
1419 case NL80211_IFTYPE_NAN:
1420 cfg80211_stop_nan(rdev, wdev);
1421 break;
1422 case NL80211_IFTYPE_AP_VLAN:
1423 case NL80211_IFTYPE_MONITOR:
1424 /* nothing to do */
1425 break;
1426 case NL80211_IFTYPE_UNSPECIFIED:
1427 case NL80211_IFTYPE_WDS:
1428 case NUM_NL80211_IFTYPES:
1429 /* invalid */
1430 break;
1431 }
1432 }
1433
cfg80211_stop_link(struct wiphy * wiphy,struct wireless_dev * wdev,int link_id,gfp_t gfp)1434 void cfg80211_stop_link(struct wiphy *wiphy, struct wireless_dev *wdev,
1435 int link_id, gfp_t gfp)
1436 {
1437 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1438 struct cfg80211_event *ev;
1439 unsigned long flags;
1440
1441 /* Only AP/GO interfaces may have a specific link_id */
1442 if (WARN_ON_ONCE(link_id != -1 &&
1443 wdev->iftype != NL80211_IFTYPE_AP &&
1444 wdev->iftype != NL80211_IFTYPE_P2P_GO))
1445 link_id = -1;
1446
1447 trace_cfg80211_stop_link(wiphy, wdev, link_id);
1448
1449 ev = kzalloc_obj(*ev, gfp);
1450 if (!ev)
1451 return;
1452
1453 ev->type = EVENT_STOPPED;
1454 ev->link_id = link_id;
1455
1456 spin_lock_irqsave(&wdev->event_lock, flags);
1457 list_add_tail(&ev->list, &wdev->event_list);
1458 spin_unlock_irqrestore(&wdev->event_lock, flags);
1459 queue_work(cfg80211_wq, &rdev->event_work);
1460 }
1461 EXPORT_SYMBOL(cfg80211_stop_link);
1462
cfg80211_init_wdev(struct wireless_dev * wdev)1463 void cfg80211_init_wdev(struct wireless_dev *wdev)
1464 {
1465 INIT_LIST_HEAD(&wdev->event_list);
1466 spin_lock_init(&wdev->event_lock);
1467 INIT_LIST_HEAD(&wdev->mgmt_registrations);
1468 INIT_LIST_HEAD(&wdev->pmsr_list);
1469 spin_lock_init(&wdev->pmsr_lock);
1470 INIT_WORK(&wdev->pmsr_free_wk, cfg80211_pmsr_free_wk);
1471
1472 #ifdef CONFIG_CFG80211_WEXT
1473 wdev->wext.default_key = -1;
1474 wdev->wext.default_mgmt_key = -1;
1475 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1476 #endif
1477
1478 wiphy_work_init(&wdev->cqm_rssi_work, cfg80211_cqm_rssi_notify_work);
1479
1480 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
1481 wdev->ps = true;
1482 else
1483 wdev->ps = false;
1484 /* allow mac80211 to determine the timeout */
1485 wdev->ps_timeout = -1;
1486
1487 wdev->radio_mask = BIT(wdev->wiphy->n_radio) - 1;
1488
1489 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1490 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
1491 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
1492 wdev->netdev->priv_flags |= IFF_DONT_BRIDGE;
1493
1494 INIT_WORK(&wdev->disconnect_wk, cfg80211_autodisconnect_wk);
1495 }
1496
cfg80211_register_wdev(struct cfg80211_registered_device * rdev,struct wireless_dev * wdev)1497 void cfg80211_register_wdev(struct cfg80211_registered_device *rdev,
1498 struct wireless_dev *wdev)
1499 {
1500 ASSERT_RTNL();
1501 lockdep_assert_held(&rdev->wiphy.mtx);
1502
1503 /*
1504 * We get here also when the interface changes network namespaces,
1505 * as it's registered into the new one, but we don't want it to
1506 * change ID in that case. Checking if the ID is already assigned
1507 * works, because 0 isn't considered a valid ID and the memory is
1508 * 0-initialized.
1509 */
1510 if (!wdev->identifier)
1511 wdev->identifier = ++rdev->wdev_id;
1512 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
1513 rdev->devlist_generation++;
1514 wdev->registered = true;
1515
1516 if (wdev->netdev &&
1517 sysfs_create_link(&wdev->netdev->dev.kobj, &rdev->wiphy.dev.kobj,
1518 "phy80211"))
1519 pr_err("failed to add phy80211 symlink to netdev!\n");
1520
1521 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
1522 }
1523
cfg80211_register_netdevice(struct net_device * dev)1524 int cfg80211_register_netdevice(struct net_device *dev)
1525 {
1526 struct wireless_dev *wdev = dev->ieee80211_ptr;
1527 struct cfg80211_registered_device *rdev;
1528 int ret;
1529
1530 ASSERT_RTNL();
1531
1532 if (WARN_ON(!wdev))
1533 return -EINVAL;
1534
1535 rdev = wiphy_to_rdev(wdev->wiphy);
1536
1537 lockdep_assert_held(&rdev->wiphy.mtx);
1538
1539 /* we'll take care of this */
1540 wdev->registered = true;
1541 wdev->registering = true;
1542 ret = register_netdevice(dev);
1543 if (ret)
1544 goto out;
1545
1546 cfg80211_register_wdev(rdev, wdev);
1547 ret = 0;
1548 out:
1549 wdev->registering = false;
1550 if (ret)
1551 wdev->registered = false;
1552 return ret;
1553 }
1554 EXPORT_SYMBOL(cfg80211_register_netdevice);
1555
cfg80211_netdev_notifier_call(struct notifier_block * nb,unsigned long state,void * ptr)1556 static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
1557 unsigned long state, void *ptr)
1558 {
1559 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1560 struct wireless_dev *wdev = dev->ieee80211_ptr;
1561 struct cfg80211_registered_device *rdev;
1562 struct cfg80211_sched_scan_request *pos, *tmp;
1563
1564 if (!wdev)
1565 return NOTIFY_DONE;
1566
1567 rdev = wiphy_to_rdev(wdev->wiphy);
1568
1569 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
1570
1571 switch (state) {
1572 case NETDEV_POST_INIT:
1573 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
1574 wdev->netdev = dev;
1575 /* can only change netns with wiphy */
1576 dev->netns_immutable = true;
1577
1578 cfg80211_init_wdev(wdev);
1579 break;
1580 case NETDEV_REGISTER:
1581 if (!wdev->registered) {
1582 guard(wiphy)(&rdev->wiphy);
1583
1584 cfg80211_register_wdev(rdev, wdev);
1585 }
1586 break;
1587 case NETDEV_UNREGISTER:
1588 /*
1589 * It is possible to get NETDEV_UNREGISTER multiple times,
1590 * so check wdev->registered.
1591 */
1592 if (wdev->registered && !wdev->registering) {
1593 guard(wiphy)(&rdev->wiphy);
1594
1595 _cfg80211_unregister_wdev(wdev, false);
1596 }
1597 break;
1598 case NETDEV_GOING_DOWN:
1599 scoped_guard(wiphy, &rdev->wiphy) {
1600 cfg80211_leave(rdev, wdev, -1);
1601 cfg80211_remove_links(wdev);
1602 }
1603 /* since we just did cfg80211_leave() nothing to do there */
1604 cancel_work_sync(&wdev->disconnect_wk);
1605 cancel_work_sync(&wdev->pmsr_free_wk);
1606 break;
1607 case NETDEV_DOWN:
1608 wiphy_lock(&rdev->wiphy);
1609 cfg80211_update_iface_num(rdev, wdev->iftype, -1);
1610 if (rdev->scan_req && rdev->scan_req->req.wdev == wdev) {
1611 if (WARN_ON(!rdev->scan_req->notified &&
1612 (!rdev->int_scan_req ||
1613 !rdev->int_scan_req->notified)))
1614 rdev->scan_req->info.aborted = true;
1615 ___cfg80211_scan_done(rdev, false);
1616 }
1617
1618 list_for_each_entry_safe(pos, tmp,
1619 &rdev->sched_scan_req_list, list) {
1620 if (WARN_ON(pos->dev == wdev->netdev))
1621 cfg80211_stop_sched_scan_req(rdev, pos, false);
1622 }
1623
1624 rdev->opencount--;
1625 wiphy_unlock(&rdev->wiphy);
1626 wake_up(&rdev->dev_wait);
1627 break;
1628 case NETDEV_UP:
1629 wiphy_lock(&rdev->wiphy);
1630 cfg80211_update_iface_num(rdev, wdev->iftype, 1);
1631 switch (wdev->iftype) {
1632 #ifdef CONFIG_CFG80211_WEXT
1633 case NL80211_IFTYPE_ADHOC:
1634 cfg80211_ibss_wext_join(rdev, wdev);
1635 break;
1636 case NL80211_IFTYPE_STATION:
1637 cfg80211_mgd_wext_connect(rdev, wdev);
1638 break;
1639 #endif
1640 #ifdef CONFIG_MAC80211_MESH
1641 case NL80211_IFTYPE_MESH_POINT:
1642 {
1643 /* backward compat code... */
1644 struct mesh_setup setup;
1645 memcpy(&setup, &default_mesh_setup,
1646 sizeof(setup));
1647 /* back compat only needed for mesh_id */
1648 setup.mesh_id = wdev->u.mesh.id;
1649 setup.mesh_id_len = wdev->u.mesh.id_up_len;
1650 if (wdev->u.mesh.id_up_len)
1651 __cfg80211_join_mesh(rdev, dev,
1652 &setup,
1653 &default_mesh_config);
1654 break;
1655 }
1656 #endif
1657 default:
1658 break;
1659 }
1660 rdev->opencount++;
1661
1662 /*
1663 * Configure power management to the driver here so that its
1664 * correctly set also after interface type changes etc.
1665 */
1666 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1667 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
1668 rdev->ops->set_power_mgmt &&
1669 rdev_set_power_mgmt(rdev, dev, wdev->ps,
1670 wdev->ps_timeout)) {
1671 /* assume this means it's off */
1672 wdev->ps = false;
1673 }
1674 wiphy_unlock(&rdev->wiphy);
1675 break;
1676 case NETDEV_PRE_UP:
1677 if (!cfg80211_iftype_allowed(wdev->wiphy, wdev->iftype,
1678 wdev->use_4addr, 0))
1679 return notifier_from_errno(-EOPNOTSUPP);
1680
1681 if (rfkill_blocked(rdev->wiphy.rfkill))
1682 return notifier_from_errno(-ERFKILL);
1683 break;
1684 default:
1685 return NOTIFY_DONE;
1686 }
1687
1688 wireless_nlevent_flush();
1689
1690 return NOTIFY_OK;
1691 }
1692
1693 static struct notifier_block cfg80211_netdev_notifier = {
1694 .notifier_call = cfg80211_netdev_notifier_call,
1695 };
1696
cfg80211_pernet_exit(struct net * net)1697 static void __net_exit cfg80211_pernet_exit(struct net *net)
1698 {
1699 struct cfg80211_registered_device *rdev;
1700
1701 rtnl_lock();
1702 for_each_rdev(rdev) {
1703 if (net_eq(wiphy_net(&rdev->wiphy), net))
1704 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
1705 }
1706 rtnl_unlock();
1707 }
1708
1709 static struct pernet_operations cfg80211_pernet_ops = {
1710 .exit = cfg80211_pernet_exit,
1711 };
1712
wiphy_work_queue(struct wiphy * wiphy,struct wiphy_work * work)1713 void wiphy_work_queue(struct wiphy *wiphy, struct wiphy_work *work)
1714 {
1715 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1716 unsigned long flags;
1717
1718 trace_wiphy_work_queue(wiphy, work);
1719
1720 spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
1721 if (list_empty(&work->entry))
1722 list_add_tail(&work->entry, &rdev->wiphy_work_list);
1723 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
1724
1725 queue_work(system_dfl_wq, &rdev->wiphy_work);
1726 }
1727 EXPORT_SYMBOL_GPL(wiphy_work_queue);
1728
wiphy_work_cancel(struct wiphy * wiphy,struct wiphy_work * work)1729 void wiphy_work_cancel(struct wiphy *wiphy, struct wiphy_work *work)
1730 {
1731 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1732 unsigned long flags;
1733
1734 lockdep_assert_held(&wiphy->mtx);
1735
1736 trace_wiphy_work_cancel(wiphy, work);
1737
1738 spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
1739 if (!list_empty(&work->entry))
1740 list_del_init(&work->entry);
1741 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
1742 }
1743 EXPORT_SYMBOL_GPL(wiphy_work_cancel);
1744
wiphy_work_flush(struct wiphy * wiphy,struct wiphy_work * work)1745 void wiphy_work_flush(struct wiphy *wiphy, struct wiphy_work *work)
1746 {
1747 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1748 unsigned long flags;
1749 bool run;
1750
1751 trace_wiphy_work_flush(wiphy, work);
1752
1753 spin_lock_irqsave(&rdev->wiphy_work_lock, flags);
1754 run = !work || !list_empty(&work->entry);
1755 spin_unlock_irqrestore(&rdev->wiphy_work_lock, flags);
1756
1757 if (run)
1758 cfg80211_process_wiphy_works(rdev, work);
1759 }
1760 EXPORT_SYMBOL_GPL(wiphy_work_flush);
1761
wiphy_delayed_work_timer(struct timer_list * t)1762 void wiphy_delayed_work_timer(struct timer_list *t)
1763 {
1764 struct wiphy_delayed_work *dwork = timer_container_of(dwork, t, timer);
1765
1766 wiphy_work_queue(dwork->wiphy, &dwork->work);
1767 }
1768 EXPORT_SYMBOL(wiphy_delayed_work_timer);
1769
wiphy_delayed_work_queue(struct wiphy * wiphy,struct wiphy_delayed_work * dwork,unsigned long delay)1770 void wiphy_delayed_work_queue(struct wiphy *wiphy,
1771 struct wiphy_delayed_work *dwork,
1772 unsigned long delay)
1773 {
1774 trace_wiphy_delayed_work_queue(wiphy, &dwork->work, delay);
1775
1776 if (!delay) {
1777 timer_delete(&dwork->timer);
1778 wiphy_work_queue(wiphy, &dwork->work);
1779 return;
1780 }
1781
1782 dwork->wiphy = wiphy;
1783 mod_timer(&dwork->timer, jiffies + delay);
1784 }
1785 EXPORT_SYMBOL_GPL(wiphy_delayed_work_queue);
1786
wiphy_delayed_work_cancel(struct wiphy * wiphy,struct wiphy_delayed_work * dwork)1787 void wiphy_delayed_work_cancel(struct wiphy *wiphy,
1788 struct wiphy_delayed_work *dwork)
1789 {
1790 lockdep_assert_held(&wiphy->mtx);
1791
1792 timer_delete_sync(&dwork->timer);
1793 wiphy_work_cancel(wiphy, &dwork->work);
1794 }
1795 EXPORT_SYMBOL_GPL(wiphy_delayed_work_cancel);
1796
wiphy_delayed_work_flush(struct wiphy * wiphy,struct wiphy_delayed_work * dwork)1797 void wiphy_delayed_work_flush(struct wiphy *wiphy,
1798 struct wiphy_delayed_work *dwork)
1799 {
1800 lockdep_assert_held(&wiphy->mtx);
1801
1802 timer_delete_sync(&dwork->timer);
1803 wiphy_work_flush(wiphy, &dwork->work);
1804 }
1805 EXPORT_SYMBOL_GPL(wiphy_delayed_work_flush);
1806
wiphy_delayed_work_pending(struct wiphy * wiphy,struct wiphy_delayed_work * dwork)1807 bool wiphy_delayed_work_pending(struct wiphy *wiphy,
1808 struct wiphy_delayed_work *dwork)
1809 {
1810 return timer_pending(&dwork->timer);
1811 }
1812 EXPORT_SYMBOL_GPL(wiphy_delayed_work_pending);
1813
wiphy_hrtimer_work_timer(struct hrtimer * t)1814 enum hrtimer_restart wiphy_hrtimer_work_timer(struct hrtimer *t)
1815 {
1816 struct wiphy_hrtimer_work *hrwork =
1817 container_of(t, struct wiphy_hrtimer_work, timer);
1818
1819 wiphy_work_queue(hrwork->wiphy, &hrwork->work);
1820
1821 return HRTIMER_NORESTART;
1822 }
1823 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_timer);
1824
wiphy_hrtimer_work_queue(struct wiphy * wiphy,struct wiphy_hrtimer_work * hrwork,ktime_t delay)1825 void wiphy_hrtimer_work_queue(struct wiphy *wiphy,
1826 struct wiphy_hrtimer_work *hrwork,
1827 ktime_t delay)
1828 {
1829 trace_wiphy_hrtimer_work_queue(wiphy, &hrwork->work, delay);
1830
1831 if (!delay) {
1832 hrtimer_cancel(&hrwork->timer);
1833 wiphy_work_queue(wiphy, &hrwork->work);
1834 return;
1835 }
1836
1837 hrwork->wiphy = wiphy;
1838 hrtimer_start_range_ns(&hrwork->timer, delay,
1839 1000 * NSEC_PER_USEC, HRTIMER_MODE_REL);
1840 }
1841 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_queue);
1842
wiphy_hrtimer_work_cancel(struct wiphy * wiphy,struct wiphy_hrtimer_work * hrwork)1843 void wiphy_hrtimer_work_cancel(struct wiphy *wiphy,
1844 struct wiphy_hrtimer_work *hrwork)
1845 {
1846 lockdep_assert_held(&wiphy->mtx);
1847
1848 hrtimer_cancel(&hrwork->timer);
1849 wiphy_work_cancel(wiphy, &hrwork->work);
1850 }
1851 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_cancel);
1852
wiphy_hrtimer_work_flush(struct wiphy * wiphy,struct wiphy_hrtimer_work * hrwork)1853 void wiphy_hrtimer_work_flush(struct wiphy *wiphy,
1854 struct wiphy_hrtimer_work *hrwork)
1855 {
1856 lockdep_assert_held(&wiphy->mtx);
1857
1858 hrtimer_cancel(&hrwork->timer);
1859 wiphy_work_flush(wiphy, &hrwork->work);
1860 }
1861 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_flush);
1862
wiphy_hrtimer_work_pending(struct wiphy * wiphy,struct wiphy_hrtimer_work * hrwork)1863 bool wiphy_hrtimer_work_pending(struct wiphy *wiphy,
1864 struct wiphy_hrtimer_work *hrwork)
1865 {
1866 return hrtimer_is_queued(&hrwork->timer);
1867 }
1868 EXPORT_SYMBOL_GPL(wiphy_hrtimer_work_pending);
1869
cfg80211_init(void)1870 static int __init cfg80211_init(void)
1871 {
1872 int err;
1873
1874 err = register_pernet_device(&cfg80211_pernet_ops);
1875 if (err)
1876 goto out_fail_pernet;
1877
1878 err = wiphy_sysfs_init();
1879 if (err)
1880 goto out_fail_sysfs;
1881
1882 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
1883 if (err)
1884 goto out_fail_notifier;
1885
1886 err = nl80211_init();
1887 if (err)
1888 goto out_fail_nl80211;
1889
1890 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
1891
1892 err = regulatory_init();
1893 if (err)
1894 goto out_fail_reg;
1895
1896 cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM);
1897 if (!cfg80211_wq) {
1898 err = -ENOMEM;
1899 goto out_fail_wq;
1900 }
1901
1902 return 0;
1903
1904 out_fail_wq:
1905 regulatory_exit();
1906 out_fail_reg:
1907 debugfs_remove(ieee80211_debugfs_dir);
1908 nl80211_exit();
1909 out_fail_nl80211:
1910 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1911 out_fail_notifier:
1912 wiphy_sysfs_exit();
1913 out_fail_sysfs:
1914 unregister_pernet_device(&cfg80211_pernet_ops);
1915 out_fail_pernet:
1916 return err;
1917 }
1918 fs_initcall(cfg80211_init);
1919
cfg80211_exit(void)1920 static void __exit cfg80211_exit(void)
1921 {
1922 debugfs_remove(ieee80211_debugfs_dir);
1923 nl80211_exit();
1924 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1925 wiphy_sysfs_exit();
1926 regulatory_exit();
1927 unregister_pernet_device(&cfg80211_pernet_ops);
1928 destroy_workqueue(cfg80211_wq);
1929 }
1930 module_exit(cfg80211_exit);
1931