1
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5
6
7#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
8
9#include <linux/if.h>
10#include <linux/module.h>
11#include <linux/err.h>
12#include <linux/list.h>
13#include <linux/slab.h>
14#include <linux/nl80211.h>
15#include <linux/debugfs.h>
16#include <linux/notifier.h>
17#include <linux/device.h>
18#include <linux/etherdevice.h>
19#include <linux/rtnetlink.h>
20#include <linux/sched.h>
21#include <net/genetlink.h>
22#include <net/cfg80211.h>
23#include "nl80211.h"
24#include "core.h"
25#include "sysfs.h"
26#include "debugfs.h"
27#include "wext-compat.h"
28#include "ethtool.h"
29#include "rdev-ops.h"
30
31
32#define PHY_NAME "phy"
33
34MODULE_AUTHOR("Johannes Berg");
35MODULE_LICENSE("GPL");
36MODULE_DESCRIPTION("wireless configuration support");
37MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME);
38
39
40LIST_HEAD(cfg80211_rdev_list);
41int cfg80211_rdev_list_generation;
42
43
44static struct dentry *ieee80211_debugfs_dir;
45
46
47struct workqueue_struct *cfg80211_wq;
48
49static bool cfg80211_disable_40mhz_24ghz;
50module_param(cfg80211_disable_40mhz_24ghz, bool, 0644);
51MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz,
52 "Disable 40MHz support in the 2.4GHz band");
53
54struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
55{
56 struct cfg80211_registered_device *result = NULL, *rdev;
57
58 ASSERT_RTNL();
59
60 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
61 if (rdev->wiphy_idx == wiphy_idx) {
62 result = rdev;
63 break;
64 }
65 }
66
67 return result;
68}
69
70int get_wiphy_idx(struct wiphy *wiphy)
71{
72 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
73
74 return rdev->wiphy_idx;
75}
76
77struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
78{
79 struct cfg80211_registered_device *rdev;
80
81 ASSERT_RTNL();
82
83 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
84 if (!rdev)
85 return NULL;
86 return &rdev->wiphy;
87}
88
89int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
90 char *newname)
91{
92 struct cfg80211_registered_device *rdev2;
93 int wiphy_idx, taken = -1, result, digits;
94
95 ASSERT_RTNL();
96
97
98 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
99 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
100
101 digits = 1;
102 while (wiphy_idx /= 10)
103 digits++;
104
105
106
107
108 if (taken == strlen(PHY_NAME) + digits)
109 return -EINVAL;
110 }
111
112
113
114 if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0)
115 return 0;
116
117
118 list_for_each_entry(rdev2, &cfg80211_rdev_list, list)
119 if (strcmp(newname, dev_name(&rdev2->wiphy.dev)) == 0)
120 return -EINVAL;
121
122 result = device_rename(&rdev->wiphy.dev, newname);
123 if (result)
124 return result;
125
126 if (rdev->wiphy.debugfsdir &&
127 !debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
128 rdev->wiphy.debugfsdir,
129 rdev->wiphy.debugfsdir->d_parent,
130 newname))
131 pr_err("failed to rename debugfs dir to %s!\n", newname);
132
133 nl80211_notify_dev_rename(rdev);
134
135 return 0;
136}
137
138int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
139 struct net *net)
140{
141 struct wireless_dev *wdev;
142 int err = 0;
143
144 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK))
145 return -EOPNOTSUPP;
146
147 list_for_each_entry(wdev, &rdev->wdev_list, list) {
148 if (!wdev->netdev)
149 continue;
150 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
151 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
152 if (err)
153 break;
154 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
155 }
156
157 if (err) {
158
159 net = wiphy_net(&rdev->wiphy);
160
161 list_for_each_entry_continue_reverse(wdev, &rdev->wdev_list,
162 list) {
163 if (!wdev->netdev)
164 continue;
165 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
166 err = dev_change_net_namespace(wdev->netdev, net,
167 "wlan%d");
168 WARN_ON(err);
169 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
170 }
171
172 return err;
173 }
174
175 wiphy_net_set(&rdev->wiphy, net);
176
177 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev));
178 WARN_ON(err);
179
180 return 0;
181}
182
183static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
184{
185 struct cfg80211_registered_device *rdev = data;
186
187 rdev_rfkill_poll(rdev);
188}
189
190void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
191 struct wireless_dev *wdev)
192{
193 ASSERT_RTNL();
194
195 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE))
196 return;
197
198 if (!wdev->p2p_started)
199 return;
200
201 rdev_stop_p2p_device(rdev, wdev);
202 wdev->p2p_started = false;
203
204 rdev->opencount--;
205
206 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
207
208
209
210
211
212
213 if (WARN_ON(!rdev->scan_req->notified))
214 rdev->scan_req->aborted = true;
215 ___cfg80211_scan_done(rdev, !rdev->scan_req->notified);
216 }
217}
218
219static int cfg80211_rfkill_set_block(void *data, bool blocked)
220{
221 struct cfg80211_registered_device *rdev = data;
222 struct wireless_dev *wdev;
223
224 if (!blocked)
225 return 0;
226
227 rtnl_lock();
228
229 list_for_each_entry(wdev, &rdev->wdev_list, list) {
230 if (wdev->netdev) {
231 dev_close(wdev->netdev);
232 continue;
233 }
234
235 switch (wdev->iftype) {
236 case NL80211_IFTYPE_P2P_DEVICE:
237 cfg80211_stop_p2p_device(rdev, wdev);
238 break;
239 default:
240 break;
241 }
242 }
243
244 rtnl_unlock();
245
246 return 0;
247}
248
249static void cfg80211_rfkill_sync_work(struct work_struct *work)
250{
251 struct cfg80211_registered_device *rdev;
252
253 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync);
254 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
255}
256
257static void cfg80211_event_work(struct work_struct *work)
258{
259 struct cfg80211_registered_device *rdev;
260
261 rdev = container_of(work, struct cfg80211_registered_device,
262 event_work);
263
264 rtnl_lock();
265 cfg80211_process_rdev_events(rdev);
266 rtnl_unlock();
267}
268
269
270
271struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
272{
273 static atomic_t wiphy_counter = ATOMIC_INIT(0);
274
275 struct cfg80211_registered_device *rdev;
276 int alloc_size;
277
278 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
279 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
280 WARN_ON(ops->connect && !ops->disconnect);
281 WARN_ON(ops->join_ibss && !ops->leave_ibss);
282 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
283 WARN_ON(ops->add_station && !ops->del_station);
284 WARN_ON(ops->add_mpath && !ops->del_mpath);
285 WARN_ON(ops->join_mesh && !ops->leave_mesh);
286
287 alloc_size = sizeof(*rdev) + sizeof_priv;
288
289 rdev = kzalloc(alloc_size, GFP_KERNEL);
290 if (!rdev)
291 return NULL;
292
293 rdev->ops = ops;
294
295 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter);
296
297 if (unlikely(rdev->wiphy_idx < 0)) {
298
299 atomic_dec(&wiphy_counter);
300 kfree(rdev);
301 return NULL;
302 }
303
304
305 rdev->wiphy_idx--;
306
307
308 dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
309
310 INIT_LIST_HEAD(&rdev->wdev_list);
311 INIT_LIST_HEAD(&rdev->beacon_registrations);
312 spin_lock_init(&rdev->beacon_registrations_lock);
313 spin_lock_init(&rdev->bss_lock);
314 INIT_LIST_HEAD(&rdev->bss_list);
315 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
316 INIT_WORK(&rdev->sched_scan_results_wk, __cfg80211_sched_scan_results);
317 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk,
318 cfg80211_dfs_channels_update_work);
319#ifdef CONFIG_CFG80211_WEXT
320 rdev->wiphy.wext = &cfg80211_wext_handler;
321#endif
322
323 device_initialize(&rdev->wiphy.dev);
324 rdev->wiphy.dev.class = &ieee80211_class;
325 rdev->wiphy.dev.platform_data = rdev;
326
327#ifdef CONFIG_CFG80211_DEFAULT_PS
328 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
329#endif
330
331 wiphy_net_set(&rdev->wiphy, &init_net);
332
333 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
334 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
335 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
336 &rdev->rfkill_ops, rdev);
337
338 if (!rdev->rfkill) {
339 kfree(rdev);
340 return NULL;
341 }
342
343 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
344 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
345 INIT_WORK(&rdev->event_work, cfg80211_event_work);
346
347 init_waitqueue_head(&rdev->dev_wait);
348
349
350
351
352
353
354 rdev->wiphy.retry_short = 7;
355 rdev->wiphy.retry_long = 4;
356 rdev->wiphy.frag_threshold = (u32) -1;
357 rdev->wiphy.rts_threshold = (u32) -1;
358 rdev->wiphy.coverage_class = 0;
359
360 rdev->wiphy.features = NL80211_FEATURE_SCAN_FLUSH;
361
362 return &rdev->wiphy;
363}
364EXPORT_SYMBOL(wiphy_new);
365
366static int wiphy_verify_combinations(struct wiphy *wiphy)
367{
368 const struct ieee80211_iface_combination *c;
369 int i, j;
370
371 for (i = 0; i < wiphy->n_iface_combinations; i++) {
372 u32 cnt = 0;
373 u16 all_iftypes = 0;
374
375 c = &wiphy->iface_combinations[i];
376
377
378
379
380
381 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths))
382 return -EINVAL;
383
384
385 if (WARN_ON(!c->num_different_channels))
386 return -EINVAL;
387
388
389
390
391
392 if (WARN_ON(c->num_different_channels >
393 CFG80211_MAX_NUM_DIFFERENT_CHANNELS))
394 return -EINVAL;
395
396
397 if (WARN_ON(c->radar_detect_widths &&
398 (c->num_different_channels > 1)))
399 return -EINVAL;
400
401 if (WARN_ON(!c->n_limits))
402 return -EINVAL;
403
404 for (j = 0; j < c->n_limits; j++) {
405 u16 types = c->limits[j].types;
406
407
408
409
410
411 if (WARN_ON(types & all_iftypes))
412 return -EINVAL;
413 all_iftypes |= types;
414
415 if (WARN_ON(!c->limits[j].max))
416 return -EINVAL;
417
418
419 if (WARN_ON(wiphy->software_iftypes & types))
420 return -EINVAL;
421
422
423 if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) &&
424 c->limits[j].max > 1))
425 return -EINVAL;
426
427 cnt += c->limits[j].max;
428
429
430
431
432 if (WARN_ON((wiphy->interface_modes & types) != types))
433 return -EINVAL;
434 }
435
436
437 if (WARN_ON(cnt < c->max_interfaces))
438 return -EINVAL;
439 }
440
441 return 0;
442}
443
444int wiphy_register(struct wiphy *wiphy)
445{
446 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
447 int res;
448 enum ieee80211_band band;
449 struct ieee80211_supported_band *sband;
450 bool have_band = false;
451 int i;
452 u16 ifmodes = wiphy->interface_modes;
453
454#ifdef CONFIG_PM
455 if (WARN_ON(wiphy->wowlan &&
456 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
457 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
458 return -EINVAL;
459 if (WARN_ON(wiphy->wowlan &&
460 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns &&
461 !wiphy->wowlan->tcp))
462 return -EINVAL;
463#endif
464
465 if (WARN_ON(wiphy->ap_sme_capa &&
466 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
467 return -EINVAL;
468
469 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
470 return -EINVAL;
471
472 if (WARN_ON(wiphy->addresses &&
473 !is_zero_ether_addr(wiphy->perm_addr) &&
474 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
475 ETH_ALEN)))
476 return -EINVAL;
477
478 if (WARN_ON(wiphy->max_acl_mac_addrs &&
479 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) ||
480 !rdev->ops->set_mac_acl)))
481 return -EINVAL;
482
483 if (wiphy->addresses)
484 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
485
486
487 WARN_ON(!ifmodes);
488 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
489 if (WARN_ON(ifmodes != wiphy->interface_modes))
490 wiphy->interface_modes = ifmodes;
491
492 res = wiphy_verify_combinations(wiphy);
493 if (res)
494 return res;
495
496
497 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
498 sband = wiphy->bands[band];
499 if (!sband)
500 continue;
501
502 sband->band = band;
503 if (WARN_ON(!sband->n_channels))
504 return -EINVAL;
505
506
507
508
509 if (WARN_ON(band != IEEE80211_BAND_60GHZ &&
510 !sband->n_bitrates))
511 return -EINVAL;
512
513
514
515
516
517
518 if (cfg80211_disable_40mhz_24ghz &&
519 band == IEEE80211_BAND_2GHZ &&
520 sband->ht_cap.ht_supported) {
521 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
522 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
523 }
524
525
526
527
528
529
530 if (WARN_ON(sband->n_bitrates > 32))
531 return -EINVAL;
532
533 for (i = 0; i < sband->n_channels; i++) {
534 sband->channels[i].orig_flags =
535 sband->channels[i].flags;
536 sband->channels[i].orig_mag = INT_MAX;
537 sband->channels[i].orig_mpwr =
538 sband->channels[i].max_power;
539 sband->channels[i].band = band;
540 }
541
542 have_band = true;
543 }
544
545 if (!have_band) {
546 WARN_ON(1);
547 return -EINVAL;
548 }
549
550#ifdef CONFIG_PM
551 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns &&
552 (!rdev->wiphy.wowlan->pattern_min_len ||
553 rdev->wiphy.wowlan->pattern_min_len >
554 rdev->wiphy.wowlan->pattern_max_len)))
555 return -EINVAL;
556#endif
557
558
559 ieee80211_set_bitrate_flags(wiphy);
560
561
562 res = device_add(&rdev->wiphy.dev);
563 if (res)
564 return res;
565
566 res = rfkill_register(rdev->rfkill);
567 if (res) {
568 device_del(&rdev->wiphy.dev);
569 return res;
570 }
571
572 rtnl_lock();
573
574 wiphy_regulatory_register(wiphy);
575
576 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
577 cfg80211_rdev_list_generation++;
578
579
580 rdev->wiphy.debugfsdir =
581 debugfs_create_dir(wiphy_name(&rdev->wiphy),
582 ieee80211_debugfs_dir);
583 if (IS_ERR(rdev->wiphy.debugfsdir))
584 rdev->wiphy.debugfsdir = NULL;
585
586 if (wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) {
587 struct regulatory_request request;
588
589 request.wiphy_idx = get_wiphy_idx(wiphy);
590 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
591 request.alpha2[0] = '9';
592 request.alpha2[1] = '9';
593
594 nl80211_send_reg_change_event(&request);
595 }
596
597 cfg80211_debugfs_rdev_add(rdev);
598
599 rdev->wiphy.registered = true;
600 rtnl_unlock();
601 return 0;
602}
603EXPORT_SYMBOL(wiphy_register);
604
605void wiphy_rfkill_start_polling(struct wiphy *wiphy)
606{
607 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
608
609 if (!rdev->ops->rfkill_poll)
610 return;
611 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
612 rfkill_resume_polling(rdev->rfkill);
613}
614EXPORT_SYMBOL(wiphy_rfkill_start_polling);
615
616void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
617{
618 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
619
620 rfkill_pause_polling(rdev->rfkill);
621}
622EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
623
624void wiphy_unregister(struct wiphy *wiphy)
625{
626 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
627
628 wait_event(rdev->dev_wait, ({
629 int __count;
630 rtnl_lock();
631 __count = rdev->opencount;
632 rtnl_unlock();
633 __count == 0; }));
634
635 rfkill_unregister(rdev->rfkill);
636
637 rtnl_lock();
638 rdev->wiphy.registered = false;
639
640 BUG_ON(!list_empty(&rdev->wdev_list));
641
642
643
644
645
646 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
647 list_del_rcu(&rdev->list);
648 synchronize_rcu();
649
650
651
652
653
654 wiphy_regulatory_deregister(wiphy);
655
656 cfg80211_rdev_list_generation++;
657 device_del(&rdev->wiphy.dev);
658
659 rtnl_unlock();
660
661 flush_work(&rdev->scan_done_wk);
662 cancel_work_sync(&rdev->conn_work);
663 flush_work(&rdev->event_work);
664 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
665
666#ifdef CONFIG_PM
667 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
668 rdev_set_wakeup(rdev, false);
669#endif
670 cfg80211_rdev_free_wowlan(rdev);
671}
672EXPORT_SYMBOL(wiphy_unregister);
673
674void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
675{
676 struct cfg80211_internal_bss *scan, *tmp;
677 struct cfg80211_beacon_registration *reg, *treg;
678 rfkill_destroy(rdev->rfkill);
679 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
680 list_del(®->list);
681 kfree(reg);
682 }
683 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
684 cfg80211_put_bss(&rdev->wiphy, &scan->pub);
685 kfree(rdev);
686}
687
688void wiphy_free(struct wiphy *wiphy)
689{
690 put_device(&wiphy->dev);
691}
692EXPORT_SYMBOL(wiphy_free);
693
694void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
695{
696 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
697
698 if (rfkill_set_hw_state(rdev->rfkill, blocked))
699 schedule_work(&rdev->rfkill_sync);
700}
701EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
702
703void cfg80211_unregister_wdev(struct wireless_dev *wdev)
704{
705 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
706
707 ASSERT_RTNL();
708
709 if (WARN_ON(wdev->netdev))
710 return;
711
712 list_del_rcu(&wdev->list);
713 rdev->devlist_generation++;
714
715 switch (wdev->iftype) {
716 case NL80211_IFTYPE_P2P_DEVICE:
717 cfg80211_stop_p2p_device(rdev, wdev);
718 break;
719 default:
720 WARN_ON_ONCE(1);
721 break;
722 }
723}
724EXPORT_SYMBOL(cfg80211_unregister_wdev);
725
726static struct device_type wiphy_type = {
727 .name = "wlan",
728};
729
730void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
731 enum nl80211_iftype iftype, int num)
732{
733 ASSERT_RTNL();
734
735 rdev->num_running_ifaces += num;
736 if (iftype == NL80211_IFTYPE_MONITOR)
737 rdev->num_running_monitor_ifaces += num;
738}
739
740void cfg80211_leave(struct cfg80211_registered_device *rdev,
741 struct wireless_dev *wdev)
742{
743 struct net_device *dev = wdev->netdev;
744
745 switch (wdev->iftype) {
746 case NL80211_IFTYPE_ADHOC:
747 cfg80211_leave_ibss(rdev, dev, true);
748 break;
749 case NL80211_IFTYPE_P2P_CLIENT:
750 case NL80211_IFTYPE_STATION:
751 __cfg80211_stop_sched_scan(rdev, false);
752
753 wdev_lock(wdev);
754#ifdef CONFIG_CFG80211_WEXT
755 kfree(wdev->wext.ie);
756 wdev->wext.ie = NULL;
757 wdev->wext.ie_len = 0;
758 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
759#endif
760 cfg80211_disconnect(rdev, dev,
761 WLAN_REASON_DEAUTH_LEAVING, true);
762 wdev_unlock(wdev);
763 break;
764 case NL80211_IFTYPE_MESH_POINT:
765 cfg80211_leave_mesh(rdev, dev);
766 break;
767 case NL80211_IFTYPE_AP:
768 case NL80211_IFTYPE_P2P_GO:
769 cfg80211_stop_ap(rdev, dev);
770 break;
771 default:
772 break;
773 }
774
775 wdev->beacon_interval = 0;
776}
777
778static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
779 unsigned long state, void *ptr)
780{
781 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
782 struct wireless_dev *wdev = dev->ieee80211_ptr;
783 struct cfg80211_registered_device *rdev;
784 int ret;
785
786 if (!wdev)
787 return NOTIFY_DONE;
788
789 rdev = wiphy_to_dev(wdev->wiphy);
790
791 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
792
793 switch (state) {
794 case NETDEV_POST_INIT:
795 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
796 break;
797 case NETDEV_REGISTER:
798
799
800
801
802
803 mutex_init(&wdev->mtx);
804 INIT_LIST_HEAD(&wdev->event_list);
805 spin_lock_init(&wdev->event_lock);
806 INIT_LIST_HEAD(&wdev->mgmt_registrations);
807 spin_lock_init(&wdev->mgmt_registrations_lock);
808
809 wdev->identifier = ++rdev->wdev_id;
810 list_add_rcu(&wdev->list, &rdev->wdev_list);
811 rdev->devlist_generation++;
812
813 dev->features |= NETIF_F_NETNS_LOCAL;
814
815 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
816 "phy80211")) {
817 pr_err("failed to add phy80211 symlink to netdev!\n");
818 }
819 wdev->netdev = dev;
820#ifdef CONFIG_CFG80211_WEXT
821 wdev->wext.default_key = -1;
822 wdev->wext.default_mgmt_key = -1;
823 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
824#endif
825
826 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
827 wdev->ps = true;
828 else
829 wdev->ps = false;
830
831 wdev->ps_timeout = -1;
832
833 netdev_set_default_ethtool_ops(dev, &cfg80211_ethtool_ops);
834
835 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
836 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
837 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
838 dev->priv_flags |= IFF_DONT_BRIDGE;
839 break;
840 case NETDEV_GOING_DOWN:
841 cfg80211_leave(rdev, wdev);
842 break;
843 case NETDEV_DOWN:
844 cfg80211_update_iface_num(rdev, wdev->iftype, -1);
845 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
846 if (WARN_ON(!rdev->scan_req->notified))
847 rdev->scan_req->aborted = true;
848 ___cfg80211_scan_done(rdev, true);
849 }
850
851 if (WARN_ON(rdev->sched_scan_req &&
852 rdev->sched_scan_req->dev == wdev->netdev)) {
853 __cfg80211_stop_sched_scan(rdev, false);
854 }
855
856 rdev->opencount--;
857 wake_up(&rdev->dev_wait);
858 break;
859 case NETDEV_UP:
860 cfg80211_update_iface_num(rdev, wdev->iftype, 1);
861 wdev_lock(wdev);
862 switch (wdev->iftype) {
863#ifdef CONFIG_CFG80211_WEXT
864 case NL80211_IFTYPE_ADHOC:
865 cfg80211_ibss_wext_join(rdev, wdev);
866 break;
867 case NL80211_IFTYPE_STATION:
868 cfg80211_mgd_wext_connect(rdev, wdev);
869 break;
870#endif
871#ifdef CONFIG_MAC80211_MESH
872 case NL80211_IFTYPE_MESH_POINT:
873 {
874
875 struct mesh_setup setup;
876 memcpy(&setup, &default_mesh_setup,
877 sizeof(setup));
878
879 setup.mesh_id = wdev->ssid;
880 setup.mesh_id_len = wdev->mesh_id_up_len;
881 if (wdev->mesh_id_up_len)
882 __cfg80211_join_mesh(rdev, dev,
883 &setup,
884 &default_mesh_config);
885 break;
886 }
887#endif
888 default:
889 break;
890 }
891 wdev_unlock(wdev);
892 rdev->opencount++;
893
894
895
896
897
898 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
899 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
900 rdev->ops->set_power_mgmt)
901 if (rdev_set_power_mgmt(rdev, dev, wdev->ps,
902 wdev->ps_timeout)) {
903
904 wdev->ps = false;
905 }
906 break;
907 case NETDEV_UNREGISTER:
908
909
910
911
912
913
914
915 if (!list_empty(&wdev->list)) {
916 sysfs_remove_link(&dev->dev.kobj, "phy80211");
917 list_del_rcu(&wdev->list);
918 rdev->devlist_generation++;
919 cfg80211_mlme_purge_registrations(wdev);
920#ifdef CONFIG_CFG80211_WEXT
921 kfree(wdev->wext.keys);
922#endif
923 }
924
925
926
927
928
929
930 synchronize_rcu();
931 INIT_LIST_HEAD(&wdev->list);
932
933
934
935
936 cfg80211_process_wdev_events(wdev);
937
938 if (WARN_ON(wdev->current_bss)) {
939 cfg80211_unhold_bss(wdev->current_bss);
940 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
941 wdev->current_bss = NULL;
942 }
943 break;
944 case NETDEV_PRE_UP:
945 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
946 return notifier_from_errno(-EOPNOTSUPP);
947 if (rfkill_blocked(rdev->rfkill))
948 return notifier_from_errno(-ERFKILL);
949 ret = cfg80211_can_add_interface(rdev, wdev->iftype);
950 if (ret)
951 return notifier_from_errno(ret);
952 break;
953 }
954
955 return NOTIFY_DONE;
956}
957
958static struct notifier_block cfg80211_netdev_notifier = {
959 .notifier_call = cfg80211_netdev_notifier_call,
960};
961
962static void __net_exit cfg80211_pernet_exit(struct net *net)
963{
964 struct cfg80211_registered_device *rdev;
965
966 rtnl_lock();
967 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
968 if (net_eq(wiphy_net(&rdev->wiphy), net))
969 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
970 }
971 rtnl_unlock();
972}
973
974static struct pernet_operations cfg80211_pernet_ops = {
975 .exit = cfg80211_pernet_exit,
976};
977
978static int __init cfg80211_init(void)
979{
980 int err;
981
982 err = register_pernet_device(&cfg80211_pernet_ops);
983 if (err)
984 goto out_fail_pernet;
985
986 err = wiphy_sysfs_init();
987 if (err)
988 goto out_fail_sysfs;
989
990 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
991 if (err)
992 goto out_fail_notifier;
993
994 err = nl80211_init();
995 if (err)
996 goto out_fail_nl80211;
997
998 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
999
1000 err = regulatory_init();
1001 if (err)
1002 goto out_fail_reg;
1003
1004 cfg80211_wq = create_singlethread_workqueue("cfg80211");
1005 if (!cfg80211_wq) {
1006 err = -ENOMEM;
1007 goto out_fail_wq;
1008 }
1009
1010 return 0;
1011
1012out_fail_wq:
1013 regulatory_exit();
1014out_fail_reg:
1015 debugfs_remove(ieee80211_debugfs_dir);
1016out_fail_nl80211:
1017 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1018out_fail_notifier:
1019 wiphy_sysfs_exit();
1020out_fail_sysfs:
1021 unregister_pernet_device(&cfg80211_pernet_ops);
1022out_fail_pernet:
1023 return err;
1024}
1025subsys_initcall(cfg80211_init);
1026
1027static void __exit cfg80211_exit(void)
1028{
1029 debugfs_remove(ieee80211_debugfs_dir);
1030 nl80211_exit();
1031 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1032 wiphy_sysfs_exit();
1033 regulatory_exit();
1034 unregister_pernet_device(&cfg80211_pernet_ops);
1035 destroy_workqueue(cfg80211_wq);
1036}
1037module_exit(cfg80211_exit);
1038