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Merge tag 'backlight-for-linus-4.9' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-2.6-block.git] / net / wireless / core.c
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CommitLineData
1/*
2 * This is the linux wireless configuration interface.
3 *
4 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
5 * Copyright 2013-2014 Intel Mobile Communications GmbH
6 * Copyright 2015 Intel Deutschland GmbH
7 */
8
9#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
10
11#include <linux/if.h>
12#include <linux/module.h>
13#include <linux/err.h>
14#include <linux/list.h>
15#include <linux/slab.h>
16#include <linux/nl80211.h>
17#include <linux/debugfs.h>
18#include <linux/notifier.h>
19#include <linux/device.h>
20#include <linux/etherdevice.h>
21#include <linux/rtnetlink.h>
22#include <linux/sched.h>
23#include <net/genetlink.h>
24#include <net/cfg80211.h>
25#include "nl80211.h"
26#include "core.h"
27#include "sysfs.h"
28#include "debugfs.h"
29#include "wext-compat.h"
30#include "rdev-ops.h"
31
32/* name for sysfs, %d is appended */
33#define PHY_NAME "phy"
34
35MODULE_AUTHOR("Johannes Berg");
36MODULE_LICENSE("GPL");
37MODULE_DESCRIPTION("wireless configuration support");
38MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME);
39
40/* RCU-protected (and RTNL for writers) */
41LIST_HEAD(cfg80211_rdev_list);
42int cfg80211_rdev_list_generation;
43
44/* for debugfs */
45static struct dentry *ieee80211_debugfs_dir;
46
47/* for the cleanup, scan and event works */
48struct workqueue_struct *cfg80211_wq;
49
50static bool cfg80211_disable_40mhz_24ghz;
51module_param(cfg80211_disable_40mhz_24ghz, bool, 0644);
52MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz,
53 "Disable 40MHz support in the 2.4GHz band");
54
55struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
56{
57 struct cfg80211_registered_device *result = NULL, *rdev;
58
59 ASSERT_RTNL();
60
61 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
62 if (rdev->wiphy_idx == wiphy_idx) {
63 result = rdev;
64 break;
65 }
66 }
67
68 return result;
69}
70
71int get_wiphy_idx(struct wiphy *wiphy)
72{
73 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
74
75 return rdev->wiphy_idx;
76}
77
78struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
79{
80 struct cfg80211_registered_device *rdev;
81
82 ASSERT_RTNL();
83
84 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
85 if (!rdev)
86 return NULL;
87 return &rdev->wiphy;
88}
89
90static int cfg80211_dev_check_name(struct cfg80211_registered_device *rdev,
91 const char *newname)
92{
93 struct cfg80211_registered_device *rdev2;
94 int wiphy_idx, taken = -1, digits;
95
96 ASSERT_RTNL();
97
98 /* prohibit calling the thing phy%d when %d is not its number */
99 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
100 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
101 /* count number of places needed to print wiphy_idx */
102 digits = 1;
103 while (wiphy_idx /= 10)
104 digits++;
105 /*
106 * deny the name if it is phy<idx> where <idx> is printed
107 * without leading zeroes. taken == strlen(newname) here
108 */
109 if (taken == strlen(PHY_NAME) + digits)
110 return -EINVAL;
111 }
112
113 /* Ensure another device does not already have this name. */
114 list_for_each_entry(rdev2, &cfg80211_rdev_list, list)
115 if (strcmp(newname, wiphy_name(&rdev2->wiphy)) == 0)
116 return -EINVAL;
117
118 return 0;
119}
120
121int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
122 char *newname)
123{
124 int result;
125
126 ASSERT_RTNL();
127
128 /* Ignore nop renames */
129 if (strcmp(newname, wiphy_name(&rdev->wiphy)) == 0)
130 return 0;
131
132 result = cfg80211_dev_check_name(rdev, newname);
133 if (result < 0)
134 return result;
135
136 result = device_rename(&rdev->wiphy.dev, newname);
137 if (result)
138 return result;
139
140 if (rdev->wiphy.debugfsdir &&
141 !debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
142 rdev->wiphy.debugfsdir,
143 rdev->wiphy.debugfsdir->d_parent,
144 newname))
145 pr_err("failed to rename debugfs dir to %s!\n", newname);
146
147 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
148
149 return 0;
150}
151
152int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
153 struct net *net)
154{
155 struct wireless_dev *wdev;
156 int err = 0;
157
158 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK))
159 return -EOPNOTSUPP;
160
161 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
162 if (!wdev->netdev)
163 continue;
164 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
165 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
166 if (err)
167 break;
168 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
169 }
170
171 if (err) {
172 /* failed -- clean up to old netns */
173 net = wiphy_net(&rdev->wiphy);
174
175 list_for_each_entry_continue_reverse(wdev,
176 &rdev->wiphy.wdev_list,
177 list) {
178 if (!wdev->netdev)
179 continue;
180 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
181 err = dev_change_net_namespace(wdev->netdev, net,
182 "wlan%d");
183 WARN_ON(err);
184 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
185 }
186
187 return err;
188 }
189
190 wiphy_net_set(&rdev->wiphy, net);
191
192 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev));
193 WARN_ON(err);
194
195 return 0;
196}
197
198static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
199{
200 struct cfg80211_registered_device *rdev = data;
201
202 rdev_rfkill_poll(rdev);
203}
204
205void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
206 struct wireless_dev *wdev)
207{
208 ASSERT_RTNL();
209
210 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE))
211 return;
212
213 if (!wdev->p2p_started)
214 return;
215
216 rdev_stop_p2p_device(rdev, wdev);
217 wdev->p2p_started = false;
218
219 rdev->opencount--;
220
221 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
222 if (WARN_ON(!rdev->scan_req->notified))
223 rdev->scan_req->info.aborted = true;
224 ___cfg80211_scan_done(rdev, false);
225 }
226}
227
228void cfg80211_stop_nan(struct cfg80211_registered_device *rdev,
229 struct wireless_dev *wdev)
230{
231 ASSERT_RTNL();
232
233 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_NAN))
234 return;
235
236 if (!wdev->nan_started)
237 return;
238
239 rdev_stop_nan(rdev, wdev);
240 wdev->nan_started = false;
241
242 rdev->opencount--;
243}
244
245void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy)
246{
247 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
248 struct wireless_dev *wdev;
249
250 ASSERT_RTNL();
251
252 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
253 if (wdev->netdev) {
254 dev_close(wdev->netdev);
255 continue;
256 }
257 /* otherwise, check iftype */
258 switch (wdev->iftype) {
259 case NL80211_IFTYPE_P2P_DEVICE:
260 cfg80211_stop_p2p_device(rdev, wdev);
261 break;
262 case NL80211_IFTYPE_NAN:
263 cfg80211_stop_nan(rdev, wdev);
264 break;
265 default:
266 break;
267 }
268 }
269}
270EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces);
271
272static int cfg80211_rfkill_set_block(void *data, bool blocked)
273{
274 struct cfg80211_registered_device *rdev = data;
275
276 if (!blocked)
277 return 0;
278
279 rtnl_lock();
280 cfg80211_shutdown_all_interfaces(&rdev->wiphy);
281 rtnl_unlock();
282
283 return 0;
284}
285
286static void cfg80211_rfkill_sync_work(struct work_struct *work)
287{
288 struct cfg80211_registered_device *rdev;
289
290 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync);
291 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
292}
293
294static void cfg80211_event_work(struct work_struct *work)
295{
296 struct cfg80211_registered_device *rdev;
297
298 rdev = container_of(work, struct cfg80211_registered_device,
299 event_work);
300
301 rtnl_lock();
302 cfg80211_process_rdev_events(rdev);
303 rtnl_unlock();
304}
305
306void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev)
307{
308 struct cfg80211_iface_destroy *item;
309
310 ASSERT_RTNL();
311
312 spin_lock_irq(&rdev->destroy_list_lock);
313 while ((item = list_first_entry_or_null(&rdev->destroy_list,
314 struct cfg80211_iface_destroy,
315 list))) {
316 struct wireless_dev *wdev, *tmp;
317 u32 nlportid = item->nlportid;
318
319 list_del(&item->list);
320 kfree(item);
321 spin_unlock_irq(&rdev->destroy_list_lock);
322
323 list_for_each_entry_safe(wdev, tmp,
324 &rdev->wiphy.wdev_list, list) {
325 if (nlportid == wdev->owner_nlportid)
326 rdev_del_virtual_intf(rdev, wdev);
327 }
328
329 spin_lock_irq(&rdev->destroy_list_lock);
330 }
331 spin_unlock_irq(&rdev->destroy_list_lock);
332}
333
334static void cfg80211_destroy_iface_wk(struct work_struct *work)
335{
336 struct cfg80211_registered_device *rdev;
337
338 rdev = container_of(work, struct cfg80211_registered_device,
339 destroy_work);
340
341 rtnl_lock();
342 cfg80211_destroy_ifaces(rdev);
343 rtnl_unlock();
344}
345
346static void cfg80211_sched_scan_stop_wk(struct work_struct *work)
347{
348 struct cfg80211_registered_device *rdev;
349
350 rdev = container_of(work, struct cfg80211_registered_device,
351 sched_scan_stop_wk);
352
353 rtnl_lock();
354
355 __cfg80211_stop_sched_scan(rdev, false);
356
357 rtnl_unlock();
358}
359
360/* exported functions */
361
362struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv,
363 const char *requested_name)
364{
365 static atomic_t wiphy_counter = ATOMIC_INIT(0);
366
367 struct cfg80211_registered_device *rdev;
368 int alloc_size;
369
370 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
371 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
372 WARN_ON(ops->connect && !ops->disconnect);
373 WARN_ON(ops->join_ibss && !ops->leave_ibss);
374 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
375 WARN_ON(ops->add_station && !ops->del_station);
376 WARN_ON(ops->add_mpath && !ops->del_mpath);
377 WARN_ON(ops->join_mesh && !ops->leave_mesh);
378 WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device);
379 WARN_ON(ops->start_ap && !ops->stop_ap);
380 WARN_ON(ops->join_ocb && !ops->leave_ocb);
381 WARN_ON(ops->suspend && !ops->resume);
382 WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop);
383 WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel);
384 WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch);
385 WARN_ON(ops->add_tx_ts && !ops->del_tx_ts);
386
387 alloc_size = sizeof(*rdev) + sizeof_priv;
388
389 rdev = kzalloc(alloc_size, GFP_KERNEL);
390 if (!rdev)
391 return NULL;
392
393 rdev->ops = ops;
394
395 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter);
396
397 if (unlikely(rdev->wiphy_idx < 0)) {
398 /* ugh, wrapped! */
399 atomic_dec(&wiphy_counter);
400 kfree(rdev);
401 return NULL;
402 }
403
404 /* atomic_inc_return makes it start at 1, make it start at 0 */
405 rdev->wiphy_idx--;
406
407 /* give it a proper name */
408 if (requested_name && requested_name[0]) {
409 int rv;
410
411 rtnl_lock();
412 rv = cfg80211_dev_check_name(rdev, requested_name);
413
414 if (rv < 0) {
415 rtnl_unlock();
416 goto use_default_name;
417 }
418
419 rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name);
420 rtnl_unlock();
421 if (rv)
422 goto use_default_name;
423 } else {
424use_default_name:
425 /* NOTE: This is *probably* safe w/out holding rtnl because of
426 * the restrictions on phy names. Probably this call could
427 * fail if some other part of the kernel (re)named a device
428 * phyX. But, might should add some locking and check return
429 * value, and use a different name if this one exists?
430 */
431 dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
432 }
433
434 INIT_LIST_HEAD(&rdev->wiphy.wdev_list);
435 INIT_LIST_HEAD(&rdev->beacon_registrations);
436 spin_lock_init(&rdev->beacon_registrations_lock);
437 spin_lock_init(&rdev->bss_lock);
438 INIT_LIST_HEAD(&rdev->bss_list);
439 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
440 INIT_WORK(&rdev->sched_scan_results_wk, __cfg80211_sched_scan_results);
441 INIT_LIST_HEAD(&rdev->mlme_unreg);
442 spin_lock_init(&rdev->mlme_unreg_lock);
443 INIT_WORK(&rdev->mlme_unreg_wk, cfg80211_mlme_unreg_wk);
444 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk,
445 cfg80211_dfs_channels_update_work);
446#ifdef CONFIG_CFG80211_WEXT
447 rdev->wiphy.wext = &cfg80211_wext_handler;
448#endif
449
450 device_initialize(&rdev->wiphy.dev);
451 rdev->wiphy.dev.class = &ieee80211_class;
452 rdev->wiphy.dev.platform_data = rdev;
453 device_enable_async_suspend(&rdev->wiphy.dev);
454
455 INIT_LIST_HEAD(&rdev->destroy_list);
456 spin_lock_init(&rdev->destroy_list_lock);
457 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk);
458 INIT_WORK(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk);
459
460#ifdef CONFIG_CFG80211_DEFAULT_PS
461 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
462#endif
463
464 wiphy_net_set(&rdev->wiphy, &init_net);
465
466 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
467 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
468 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
469 &rdev->rfkill_ops, rdev);
470
471 if (!rdev->rfkill) {
472 kfree(rdev);
473 return NULL;
474 }
475
476 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
477 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
478 INIT_WORK(&rdev->event_work, cfg80211_event_work);
479
480 init_waitqueue_head(&rdev->dev_wait);
481
482 /*
483 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
484 * Fragmentation and RTS threshold are disabled by default with the
485 * special -1 value.
486 */
487 rdev->wiphy.retry_short = 7;
488 rdev->wiphy.retry_long = 4;
489 rdev->wiphy.frag_threshold = (u32) -1;
490 rdev->wiphy.rts_threshold = (u32) -1;
491 rdev->wiphy.coverage_class = 0;
492
493 rdev->wiphy.max_num_csa_counters = 1;
494
495 rdev->wiphy.max_sched_scan_plans = 1;
496 rdev->wiphy.max_sched_scan_plan_interval = U32_MAX;
497
498 return &rdev->wiphy;
499}
500EXPORT_SYMBOL(wiphy_new_nm);
501
502static int wiphy_verify_combinations(struct wiphy *wiphy)
503{
504 const struct ieee80211_iface_combination *c;
505 int i, j;
506
507 for (i = 0; i < wiphy->n_iface_combinations; i++) {
508 u32 cnt = 0;
509 u16 all_iftypes = 0;
510
511 c = &wiphy->iface_combinations[i];
512
513 /*
514 * Combinations with just one interface aren't real,
515 * however we make an exception for DFS.
516 */
517 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths))
518 return -EINVAL;
519
520 /* Need at least one channel */
521 if (WARN_ON(!c->num_different_channels))
522 return -EINVAL;
523
524 /*
525 * Put a sane limit on maximum number of different
526 * channels to simplify channel accounting code.
527 */
528 if (WARN_ON(c->num_different_channels >
529 CFG80211_MAX_NUM_DIFFERENT_CHANNELS))
530 return -EINVAL;
531
532 /* DFS only works on one channel. */
533 if (WARN_ON(c->radar_detect_widths &&
534 (c->num_different_channels > 1)))
535 return -EINVAL;
536
537 if (WARN_ON(!c->n_limits))
538 return -EINVAL;
539
540 for (j = 0; j < c->n_limits; j++) {
541 u16 types = c->limits[j].types;
542
543 /* interface types shouldn't overlap */
544 if (WARN_ON(types & all_iftypes))
545 return -EINVAL;
546 all_iftypes |= types;
547
548 if (WARN_ON(!c->limits[j].max))
549 return -EINVAL;
550
551 /* Shouldn't list software iftypes in combinations! */
552 if (WARN_ON(wiphy->software_iftypes & types))
553 return -EINVAL;
554
555 /* Only a single P2P_DEVICE can be allowed */
556 if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) &&
557 c->limits[j].max > 1))
558 return -EINVAL;
559
560 /* Only a single NAN can be allowed */
561 if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) &&
562 c->limits[j].max > 1))
563 return -EINVAL;
564
565 cnt += c->limits[j].max;
566 /*
567 * Don't advertise an unsupported type
568 * in a combination.
569 */
570 if (WARN_ON((wiphy->interface_modes & types) != types))
571 return -EINVAL;
572 }
573
574 /* You can't even choose that many! */
575 if (WARN_ON(cnt < c->max_interfaces))
576 return -EINVAL;
577 }
578
579 return 0;
580}
581
582int wiphy_register(struct wiphy *wiphy)
583{
584 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
585 int res;
586 enum nl80211_band band;
587 struct ieee80211_supported_band *sband;
588 bool have_band = false;
589 int i;
590 u16 ifmodes = wiphy->interface_modes;
591
592#ifdef CONFIG_PM
593 if (WARN_ON(wiphy->wowlan &&
594 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
595 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
596 return -EINVAL;
597 if (WARN_ON(wiphy->wowlan &&
598 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns &&
599 !wiphy->wowlan->tcp))
600 return -EINVAL;
601#endif
602 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
603 (!rdev->ops->tdls_channel_switch ||
604 !rdev->ops->tdls_cancel_channel_switch)))
605 return -EINVAL;
606
607 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) &&
608 (!rdev->ops->start_nan || !rdev->ops->stop_nan ||
609 !rdev->ops->add_nan_func || !rdev->ops->del_nan_func)))
610 return -EINVAL;
611
612 /*
613 * if a wiphy has unsupported modes for regulatory channel enforcement,
614 * opt-out of enforcement checking
615 */
616 if (wiphy->interface_modes & ~(BIT(NL80211_IFTYPE_STATION) |
617 BIT(NL80211_IFTYPE_P2P_CLIENT) |
618 BIT(NL80211_IFTYPE_AP) |
619 BIT(NL80211_IFTYPE_P2P_GO) |
620 BIT(NL80211_IFTYPE_ADHOC) |
621 BIT(NL80211_IFTYPE_P2P_DEVICE) |
622 BIT(NL80211_IFTYPE_NAN) |
623 BIT(NL80211_IFTYPE_AP_VLAN) |
624 BIT(NL80211_IFTYPE_MONITOR)))
625 wiphy->regulatory_flags |= REGULATORY_IGNORE_STALE_KICKOFF;
626
627 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) &&
628 (wiphy->regulatory_flags &
629 (REGULATORY_CUSTOM_REG |
630 REGULATORY_STRICT_REG |
631 REGULATORY_COUNTRY_IE_FOLLOW_POWER |
632 REGULATORY_COUNTRY_IE_IGNORE))))
633 return -EINVAL;
634
635 if (WARN_ON(wiphy->coalesce &&
636 (!wiphy->coalesce->n_rules ||
637 !wiphy->coalesce->n_patterns) &&
638 (!wiphy->coalesce->pattern_min_len ||
639 wiphy->coalesce->pattern_min_len >
640 wiphy->coalesce->pattern_max_len)))
641 return -EINVAL;
642
643 if (WARN_ON(wiphy->ap_sme_capa &&
644 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
645 return -EINVAL;
646
647 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
648 return -EINVAL;
649
650 if (WARN_ON(wiphy->addresses &&
651 !is_zero_ether_addr(wiphy->perm_addr) &&
652 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
653 ETH_ALEN)))
654 return -EINVAL;
655
656 if (WARN_ON(wiphy->max_acl_mac_addrs &&
657 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) ||
658 !rdev->ops->set_mac_acl)))
659 return -EINVAL;
660
661 /* assure only valid behaviours are flagged by driver
662 * hence subtract 2 as bit 0 is invalid.
663 */
664 if (WARN_ON(wiphy->bss_select_support &&
665 (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2))))
666 return -EINVAL;
667
668 if (wiphy->addresses)
669 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
670
671 /* sanity check ifmodes */
672 WARN_ON(!ifmodes);
673 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
674 if (WARN_ON(ifmodes != wiphy->interface_modes))
675 wiphy->interface_modes = ifmodes;
676
677 res = wiphy_verify_combinations(wiphy);
678 if (res)
679 return res;
680
681 /* sanity check supported bands/channels */
682 for (band = 0; band < NUM_NL80211_BANDS; band++) {
683 sband = wiphy->bands[band];
684 if (!sband)
685 continue;
686
687 sband->band = band;
688 if (WARN_ON(!sband->n_channels))
689 return -EINVAL;
690 /*
691 * on 60GHz band, there are no legacy rates, so
692 * n_bitrates is 0
693 */
694 if (WARN_ON(band != NL80211_BAND_60GHZ &&
695 !sband->n_bitrates))
696 return -EINVAL;
697
698 /*
699 * Since cfg80211_disable_40mhz_24ghz is global, we can
700 * modify the sband's ht data even if the driver uses a
701 * global structure for that.
702 */
703 if (cfg80211_disable_40mhz_24ghz &&
704 band == NL80211_BAND_2GHZ &&
705 sband->ht_cap.ht_supported) {
706 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
707 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
708 }
709
710 /*
711 * Since we use a u32 for rate bitmaps in
712 * ieee80211_get_response_rate, we cannot
713 * have more than 32 legacy rates.
714 */
715 if (WARN_ON(sband->n_bitrates > 32))
716 return -EINVAL;
717
718 for (i = 0; i < sband->n_channels; i++) {
719 sband->channels[i].orig_flags =
720 sband->channels[i].flags;
721 sband->channels[i].orig_mag = INT_MAX;
722 sband->channels[i].orig_mpwr =
723 sband->channels[i].max_power;
724 sband->channels[i].band = band;
725 }
726
727 have_band = true;
728 }
729
730 if (!have_band) {
731 WARN_ON(1);
732 return -EINVAL;
733 }
734
735#ifdef CONFIG_PM
736 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns &&
737 (!rdev->wiphy.wowlan->pattern_min_len ||
738 rdev->wiphy.wowlan->pattern_min_len >
739 rdev->wiphy.wowlan->pattern_max_len)))
740 return -EINVAL;
741#endif
742
743 /* check and set up bitrates */
744 ieee80211_set_bitrate_flags(wiphy);
745
746 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH;
747
748 rtnl_lock();
749 res = device_add(&rdev->wiphy.dev);
750 if (res) {
751 rtnl_unlock();
752 return res;
753 }
754
755 /* set up regulatory info */
756 wiphy_regulatory_register(wiphy);
757
758 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
759 cfg80211_rdev_list_generation++;
760
761 /* add to debugfs */
762 rdev->wiphy.debugfsdir =
763 debugfs_create_dir(wiphy_name(&rdev->wiphy),
764 ieee80211_debugfs_dir);
765 if (IS_ERR(rdev->wiphy.debugfsdir))
766 rdev->wiphy.debugfsdir = NULL;
767
768 cfg80211_debugfs_rdev_add(rdev);
769 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
770
771 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
772 struct regulatory_request request;
773
774 request.wiphy_idx = get_wiphy_idx(wiphy);
775 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
776 request.alpha2[0] = '9';
777 request.alpha2[1] = '9';
778
779 nl80211_send_reg_change_event(&request);
780 }
781
782 /* Check that nobody globally advertises any capabilities they do not
783 * advertise on all possible interface types.
784 */
785 if (wiphy->extended_capabilities_len &&
786 wiphy->num_iftype_ext_capab &&
787 wiphy->iftype_ext_capab) {
788 u8 supported_on_all, j;
789 const struct wiphy_iftype_ext_capab *capab;
790
791 capab = wiphy->iftype_ext_capab;
792 for (j = 0; j < wiphy->extended_capabilities_len; j++) {
793 if (capab[0].extended_capabilities_len > j)
794 supported_on_all =
795 capab[0].extended_capabilities[j];
796 else
797 supported_on_all = 0x00;
798 for (i = 1; i < wiphy->num_iftype_ext_capab; i++) {
799 if (j >= capab[i].extended_capabilities_len) {
800 supported_on_all = 0x00;
801 break;
802 }
803 supported_on_all &=
804 capab[i].extended_capabilities[j];
805 }
806 if (WARN_ON(wiphy->extended_capabilities[j] &
807 ~supported_on_all))
808 break;
809 }
810 }
811
812 rdev->wiphy.registered = true;
813 rtnl_unlock();
814
815 res = rfkill_register(rdev->rfkill);
816 if (res) {
817 rfkill_destroy(rdev->rfkill);
818 rdev->rfkill = NULL;
819 wiphy_unregister(&rdev->wiphy);
820 return res;
821 }
822
823 return 0;
824}
825EXPORT_SYMBOL(wiphy_register);
826
827void wiphy_rfkill_start_polling(struct wiphy *wiphy)
828{
829 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
830
831 if (!rdev->ops->rfkill_poll)
832 return;
833 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
834 rfkill_resume_polling(rdev->rfkill);
835}
836EXPORT_SYMBOL(wiphy_rfkill_start_polling);
837
838void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
839{
840 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
841
842 rfkill_pause_polling(rdev->rfkill);
843}
844EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
845
846void wiphy_unregister(struct wiphy *wiphy)
847{
848 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
849
850 wait_event(rdev->dev_wait, ({
851 int __count;
852 rtnl_lock();
853 __count = rdev->opencount;
854 rtnl_unlock();
855 __count == 0; }));
856
857 if (rdev->rfkill)
858 rfkill_unregister(rdev->rfkill);
859
860 rtnl_lock();
861 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
862 rdev->wiphy.registered = false;
863
864 WARN_ON(!list_empty(&rdev->wiphy.wdev_list));
865
866 /*
867 * First remove the hardware from everywhere, this makes
868 * it impossible to find from userspace.
869 */
870 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
871 list_del_rcu(&rdev->list);
872 synchronize_rcu();
873
874 /*
875 * If this device got a regulatory hint tell core its
876 * free to listen now to a new shiny device regulatory hint
877 */
878 wiphy_regulatory_deregister(wiphy);
879
880 cfg80211_rdev_list_generation++;
881 device_del(&rdev->wiphy.dev);
882
883 rtnl_unlock();
884
885 flush_work(&rdev->scan_done_wk);
886 cancel_work_sync(&rdev->conn_work);
887 flush_work(&rdev->event_work);
888 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
889 flush_work(&rdev->destroy_work);
890 flush_work(&rdev->sched_scan_stop_wk);
891 flush_work(&rdev->mlme_unreg_wk);
892
893#ifdef CONFIG_PM
894 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
895 rdev_set_wakeup(rdev, false);
896#endif
897 cfg80211_rdev_free_wowlan(rdev);
898 cfg80211_rdev_free_coalesce(rdev);
899}
900EXPORT_SYMBOL(wiphy_unregister);
901
902void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
903{
904 struct cfg80211_internal_bss *scan, *tmp;
905 struct cfg80211_beacon_registration *reg, *treg;
906 rfkill_destroy(rdev->rfkill);
907 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
908 list_del(&reg->list);
909 kfree(reg);
910 }
911 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
912 cfg80211_put_bss(&rdev->wiphy, &scan->pub);
913 kfree(rdev);
914}
915
916void wiphy_free(struct wiphy *wiphy)
917{
918 put_device(&wiphy->dev);
919}
920EXPORT_SYMBOL(wiphy_free);
921
922void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
923{
924 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
925
926 if (rfkill_set_hw_state(rdev->rfkill, blocked))
927 schedule_work(&rdev->rfkill_sync);
928}
929EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
930
931void cfg80211_unregister_wdev(struct wireless_dev *wdev)
932{
933 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
934
935 ASSERT_RTNL();
936
937 if (WARN_ON(wdev->netdev))
938 return;
939
940 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE);
941
942 list_del_rcu(&wdev->list);
943 rdev->devlist_generation++;
944
945 switch (wdev->iftype) {
946 case NL80211_IFTYPE_P2P_DEVICE:
947 cfg80211_mlme_purge_registrations(wdev);
948 cfg80211_stop_p2p_device(rdev, wdev);
949 break;
950 case NL80211_IFTYPE_NAN:
951 cfg80211_stop_nan(rdev, wdev);
952 break;
953 default:
954 WARN_ON_ONCE(1);
955 break;
956 }
957}
958EXPORT_SYMBOL(cfg80211_unregister_wdev);
959
960static const struct device_type wiphy_type = {
961 .name = "wlan",
962};
963
964void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
965 enum nl80211_iftype iftype, int num)
966{
967 ASSERT_RTNL();
968
969 rdev->num_running_ifaces += num;
970 if (iftype == NL80211_IFTYPE_MONITOR)
971 rdev->num_running_monitor_ifaces += num;
972}
973
974void __cfg80211_leave(struct cfg80211_registered_device *rdev,
975 struct wireless_dev *wdev)
976{
977 struct net_device *dev = wdev->netdev;
978 struct cfg80211_sched_scan_request *sched_scan_req;
979
980 ASSERT_RTNL();
981 ASSERT_WDEV_LOCK(wdev);
982
983 switch (wdev->iftype) {
984 case NL80211_IFTYPE_ADHOC:
985 __cfg80211_leave_ibss(rdev, dev, true);
986 break;
987 case NL80211_IFTYPE_P2P_CLIENT:
988 case NL80211_IFTYPE_STATION:
989 sched_scan_req = rtnl_dereference(rdev->sched_scan_req);
990 if (sched_scan_req && dev == sched_scan_req->dev)
991 __cfg80211_stop_sched_scan(rdev, false);
992
993#ifdef CONFIG_CFG80211_WEXT
994 kfree(wdev->wext.ie);
995 wdev->wext.ie = NULL;
996 wdev->wext.ie_len = 0;
997 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
998#endif
999 cfg80211_disconnect(rdev, dev,
1000 WLAN_REASON_DEAUTH_LEAVING, true);
1001 break;
1002 case NL80211_IFTYPE_MESH_POINT:
1003 __cfg80211_leave_mesh(rdev, dev);
1004 break;
1005 case NL80211_IFTYPE_AP:
1006 case NL80211_IFTYPE_P2P_GO:
1007 __cfg80211_stop_ap(rdev, dev, true);
1008 break;
1009 case NL80211_IFTYPE_OCB:
1010 __cfg80211_leave_ocb(rdev, dev);
1011 break;
1012 case NL80211_IFTYPE_WDS:
1013 /* must be handled by mac80211/driver, has no APIs */
1014 break;
1015 case NL80211_IFTYPE_P2P_DEVICE:
1016 case NL80211_IFTYPE_NAN:
1017 /* cannot happen, has no netdev */
1018 break;
1019 case NL80211_IFTYPE_AP_VLAN:
1020 case NL80211_IFTYPE_MONITOR:
1021 /* nothing to do */
1022 break;
1023 case NL80211_IFTYPE_UNSPECIFIED:
1024 case NUM_NL80211_IFTYPES:
1025 /* invalid */
1026 break;
1027 }
1028}
1029
1030void cfg80211_leave(struct cfg80211_registered_device *rdev,
1031 struct wireless_dev *wdev)
1032{
1033 wdev_lock(wdev);
1034 __cfg80211_leave(rdev, wdev);
1035 wdev_unlock(wdev);
1036}
1037
1038void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev,
1039 gfp_t gfp)
1040{
1041 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1042 struct cfg80211_event *ev;
1043 unsigned long flags;
1044
1045 trace_cfg80211_stop_iface(wiphy, wdev);
1046
1047 ev = kzalloc(sizeof(*ev), gfp);
1048 if (!ev)
1049 return;
1050
1051 ev->type = EVENT_STOPPED;
1052
1053 spin_lock_irqsave(&wdev->event_lock, flags);
1054 list_add_tail(&ev->list, &wdev->event_list);
1055 spin_unlock_irqrestore(&wdev->event_lock, flags);
1056 queue_work(cfg80211_wq, &rdev->event_work);
1057}
1058EXPORT_SYMBOL(cfg80211_stop_iface);
1059
1060static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
1061 unsigned long state, void *ptr)
1062{
1063 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1064 struct wireless_dev *wdev = dev->ieee80211_ptr;
1065 struct cfg80211_registered_device *rdev;
1066 struct cfg80211_sched_scan_request *sched_scan_req;
1067
1068 if (!wdev)
1069 return NOTIFY_DONE;
1070
1071 rdev = wiphy_to_rdev(wdev->wiphy);
1072
1073 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
1074
1075 switch (state) {
1076 case NETDEV_POST_INIT:
1077 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
1078 break;
1079 case NETDEV_REGISTER:
1080 /*
1081 * NB: cannot take rdev->mtx here because this may be
1082 * called within code protected by it when interfaces
1083 * are added with nl80211.
1084 */
1085 mutex_init(&wdev->mtx);
1086 INIT_LIST_HEAD(&wdev->event_list);
1087 spin_lock_init(&wdev->event_lock);
1088 INIT_LIST_HEAD(&wdev->mgmt_registrations);
1089 spin_lock_init(&wdev->mgmt_registrations_lock);
1090
1091 wdev->identifier = ++rdev->wdev_id;
1092 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
1093 rdev->devlist_generation++;
1094 /* can only change netns with wiphy */
1095 dev->features |= NETIF_F_NETNS_LOCAL;
1096
1097 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
1098 "phy80211")) {
1099 pr_err("failed to add phy80211 symlink to netdev!\n");
1100 }
1101 wdev->netdev = dev;
1102#ifdef CONFIG_CFG80211_WEXT
1103 wdev->wext.default_key = -1;
1104 wdev->wext.default_mgmt_key = -1;
1105 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1106#endif
1107
1108 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
1109 wdev->ps = true;
1110 else
1111 wdev->ps = false;
1112 /* allow mac80211 to determine the timeout */
1113 wdev->ps_timeout = -1;
1114
1115 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1116 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
1117 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
1118 dev->priv_flags |= IFF_DONT_BRIDGE;
1119
1120 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
1121 break;
1122 case NETDEV_GOING_DOWN:
1123 cfg80211_leave(rdev, wdev);
1124 break;
1125 case NETDEV_DOWN:
1126 cfg80211_update_iface_num(rdev, wdev->iftype, -1);
1127 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
1128 if (WARN_ON(!rdev->scan_req->notified))
1129 rdev->scan_req->info.aborted = true;
1130 ___cfg80211_scan_done(rdev, false);
1131 }
1132
1133 sched_scan_req = rtnl_dereference(rdev->sched_scan_req);
1134 if (WARN_ON(sched_scan_req &&
1135 sched_scan_req->dev == wdev->netdev)) {
1136 __cfg80211_stop_sched_scan(rdev, false);
1137 }
1138
1139 rdev->opencount--;
1140 wake_up(&rdev->dev_wait);
1141 break;
1142 case NETDEV_UP:
1143 cfg80211_update_iface_num(rdev, wdev->iftype, 1);
1144 wdev_lock(wdev);
1145 switch (wdev->iftype) {
1146#ifdef CONFIG_CFG80211_WEXT
1147 case NL80211_IFTYPE_ADHOC:
1148 cfg80211_ibss_wext_join(rdev, wdev);
1149 break;
1150 case NL80211_IFTYPE_STATION:
1151 cfg80211_mgd_wext_connect(rdev, wdev);
1152 break;
1153#endif
1154#ifdef CONFIG_MAC80211_MESH
1155 case NL80211_IFTYPE_MESH_POINT:
1156 {
1157 /* backward compat code... */
1158 struct mesh_setup setup;
1159 memcpy(&setup, &default_mesh_setup,
1160 sizeof(setup));
1161 /* back compat only needed for mesh_id */
1162 setup.mesh_id = wdev->ssid;
1163 setup.mesh_id_len = wdev->mesh_id_up_len;
1164 if (wdev->mesh_id_up_len)
1165 __cfg80211_join_mesh(rdev, dev,
1166 &setup,
1167 &default_mesh_config);
1168 break;
1169 }
1170#endif
1171 default:
1172 break;
1173 }
1174 wdev_unlock(wdev);
1175 rdev->opencount++;
1176
1177 /*
1178 * Configure power management to the driver here so that its
1179 * correctly set also after interface type changes etc.
1180 */
1181 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1182 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
1183 rdev->ops->set_power_mgmt)
1184 if (rdev_set_power_mgmt(rdev, dev, wdev->ps,
1185 wdev->ps_timeout)) {
1186 /* assume this means it's off */
1187 wdev->ps = false;
1188 }
1189 break;
1190 case NETDEV_UNREGISTER:
1191 /*
1192 * It is possible to get NETDEV_UNREGISTER
1193 * multiple times. To detect that, check
1194 * that the interface is still on the list
1195 * of registered interfaces, and only then
1196 * remove and clean it up.
1197 */
1198 if (!list_empty(&wdev->list)) {
1199 nl80211_notify_iface(rdev, wdev,
1200 NL80211_CMD_DEL_INTERFACE);
1201 sysfs_remove_link(&dev->dev.kobj, "phy80211");
1202 list_del_rcu(&wdev->list);
1203 rdev->devlist_generation++;
1204 cfg80211_mlme_purge_registrations(wdev);
1205#ifdef CONFIG_CFG80211_WEXT
1206 kzfree(wdev->wext.keys);
1207#endif
1208 }
1209 /*
1210 * synchronise (so that we won't find this netdev
1211 * from other code any more) and then clear the list
1212 * head so that the above code can safely check for
1213 * !list_empty() to avoid double-cleanup.
1214 */
1215 synchronize_rcu();
1216 INIT_LIST_HEAD(&wdev->list);
1217 /*
1218 * Ensure that all events have been processed and
1219 * freed.
1220 */
1221 cfg80211_process_wdev_events(wdev);
1222
1223 if (WARN_ON(wdev->current_bss)) {
1224 cfg80211_unhold_bss(wdev->current_bss);
1225 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
1226 wdev->current_bss = NULL;
1227 }
1228 break;
1229 case NETDEV_PRE_UP:
1230 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
1231 return notifier_from_errno(-EOPNOTSUPP);
1232 if (rfkill_blocked(rdev->rfkill))
1233 return notifier_from_errno(-ERFKILL);
1234 break;
1235 default:
1236 return NOTIFY_DONE;
1237 }
1238
1239 wireless_nlevent_flush();
1240
1241 return NOTIFY_OK;
1242}
1243
1244static struct notifier_block cfg80211_netdev_notifier = {
1245 .notifier_call = cfg80211_netdev_notifier_call,
1246};
1247
1248static void __net_exit cfg80211_pernet_exit(struct net *net)
1249{
1250 struct cfg80211_registered_device *rdev;
1251
1252 rtnl_lock();
1253 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1254 if (net_eq(wiphy_net(&rdev->wiphy), net))
1255 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
1256 }
1257 rtnl_unlock();
1258}
1259
1260static struct pernet_operations cfg80211_pernet_ops = {
1261 .exit = cfg80211_pernet_exit,
1262};
1263
1264static int __init cfg80211_init(void)
1265{
1266 int err;
1267
1268 err = register_pernet_device(&cfg80211_pernet_ops);
1269 if (err)
1270 goto out_fail_pernet;
1271
1272 err = wiphy_sysfs_init();
1273 if (err)
1274 goto out_fail_sysfs;
1275
1276 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
1277 if (err)
1278 goto out_fail_notifier;
1279
1280 err = nl80211_init();
1281 if (err)
1282 goto out_fail_nl80211;
1283
1284 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
1285
1286 err = regulatory_init();
1287 if (err)
1288 goto out_fail_reg;
1289
1290 cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM);
1291 if (!cfg80211_wq) {
1292 err = -ENOMEM;
1293 goto out_fail_wq;
1294 }
1295
1296 return 0;
1297
1298out_fail_wq:
1299 regulatory_exit();
1300out_fail_reg:
1301 debugfs_remove(ieee80211_debugfs_dir);
1302 nl80211_exit();
1303out_fail_nl80211:
1304 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1305out_fail_notifier:
1306 wiphy_sysfs_exit();
1307out_fail_sysfs:
1308 unregister_pernet_device(&cfg80211_pernet_ops);
1309out_fail_pernet:
1310 return err;
1311}
1312subsys_initcall(cfg80211_init);
1313
1314static void __exit cfg80211_exit(void)
1315{
1316 debugfs_remove(ieee80211_debugfs_dir);
1317 nl80211_exit();
1318 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1319 wiphy_sysfs_exit();
1320 regulatory_exit();
1321 unregister_pernet_device(&cfg80211_pernet_ops);
1322 destroy_workqueue(cfg80211_wq);
1323}
1324module_exit(cfg80211_exit);
Linux 6.x block layer and io_uring tree(s)