1
2
3
4
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
30
31#define PHY_NAME "phy"
32
33MODULE_AUTHOR("Johannes Berg");
34MODULE_LICENSE("GPL");
35MODULE_DESCRIPTION("wireless configuration support");
36
37
38LIST_HEAD(cfg80211_rdev_list);
39int cfg80211_rdev_list_generation;
40
41DEFINE_MUTEX(cfg80211_mutex);
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
54
55struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
56{
57 struct cfg80211_registered_device *result = NULL, *rdev;
58
59 if (!wiphy_idx_valid(wiphy_idx))
60 return NULL;
61
62 assert_cfg80211_lock();
63
64 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
65 if (rdev->wiphy_idx == wiphy_idx) {
66 result = rdev;
67 break;
68 }
69 }
70
71 return result;
72}
73
74int get_wiphy_idx(struct wiphy *wiphy)
75{
76 struct cfg80211_registered_device *rdev;
77 if (!wiphy)
78 return WIPHY_IDX_STALE;
79 rdev = wiphy_to_dev(wiphy);
80 return rdev->wiphy_idx;
81}
82
83
84struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
85{
86 struct cfg80211_registered_device *rdev;
87
88 if (!wiphy_idx_valid(wiphy_idx))
89 return NULL;
90
91 assert_cfg80211_lock();
92
93 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
94 if (!rdev)
95 return NULL;
96 return &rdev->wiphy;
97}
98
99
100struct cfg80211_registered_device *
101__cfg80211_rdev_from_info(struct genl_info *info)
102{
103 int ifindex;
104 struct cfg80211_registered_device *bywiphyidx = NULL, *byifidx = NULL;
105 struct net_device *dev;
106 int err = -EINVAL;
107
108 assert_cfg80211_lock();
109
110 if (info->attrs[NL80211_ATTR_WIPHY]) {
111 bywiphyidx = cfg80211_rdev_by_wiphy_idx(
112 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY]));
113 err = -ENODEV;
114 }
115
116 if (info->attrs[NL80211_ATTR_IFINDEX]) {
117 ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
118 dev = dev_get_by_index(genl_info_net(info), ifindex);
119 if (dev) {
120 if (dev->ieee80211_ptr)
121 byifidx =
122 wiphy_to_dev(dev->ieee80211_ptr->wiphy);
123 dev_put(dev);
124 }
125 err = -ENODEV;
126 }
127
128 if (bywiphyidx && byifidx) {
129 if (bywiphyidx != byifidx)
130 return ERR_PTR(-EINVAL);
131 else
132 return bywiphyidx;
133 }
134 if (bywiphyidx)
135 return bywiphyidx;
136
137 if (byifidx)
138 return byifidx;
139
140 return ERR_PTR(err);
141}
142
143struct cfg80211_registered_device *
144cfg80211_get_dev_from_info(struct genl_info *info)
145{
146 struct cfg80211_registered_device *rdev;
147
148 mutex_lock(&cfg80211_mutex);
149 rdev = __cfg80211_rdev_from_info(info);
150
151
152
153
154 if (!IS_ERR(rdev))
155 mutex_lock(&rdev->mtx);
156
157 mutex_unlock(&cfg80211_mutex);
158
159 return rdev;
160}
161
162struct cfg80211_registered_device *
163cfg80211_get_dev_from_ifindex(struct net *net, int ifindex)
164{
165 struct cfg80211_registered_device *rdev = ERR_PTR(-ENODEV);
166 struct net_device *dev;
167
168 mutex_lock(&cfg80211_mutex);
169 dev = dev_get_by_index(net, ifindex);
170 if (!dev)
171 goto out;
172 if (dev->ieee80211_ptr) {
173 rdev = wiphy_to_dev(dev->ieee80211_ptr->wiphy);
174 mutex_lock(&rdev->mtx);
175 } else
176 rdev = ERR_PTR(-ENODEV);
177 dev_put(dev);
178 out:
179 mutex_unlock(&cfg80211_mutex);
180 return rdev;
181}
182
183
184int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
185 char *newname)
186{
187 struct cfg80211_registered_device *rdev2;
188 int wiphy_idx, taken = -1, result, digits;
189
190 assert_cfg80211_lock();
191
192
193 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
194 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
195
196 digits = 1;
197 while (wiphy_idx /= 10)
198 digits++;
199
200
201
202
203 if (taken == strlen(PHY_NAME) + digits)
204 return -EINVAL;
205 }
206
207
208
209 if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0)
210 return 0;
211
212
213 list_for_each_entry(rdev2, &cfg80211_rdev_list, list)
214 if (strcmp(newname, dev_name(&rdev2->wiphy.dev)) == 0)
215 return -EINVAL;
216
217 result = device_rename(&rdev->wiphy.dev, newname);
218 if (result)
219 return result;
220
221 if (rdev->wiphy.debugfsdir &&
222 !debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
223 rdev->wiphy.debugfsdir,
224 rdev->wiphy.debugfsdir->d_parent,
225 newname))
226 pr_err("failed to rename debugfs dir to %s!\n", newname);
227
228 nl80211_notify_dev_rename(rdev);
229
230 return 0;
231}
232
233int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
234 struct net *net)
235{
236 struct wireless_dev *wdev;
237 int err = 0;
238
239 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK))
240 return -EOPNOTSUPP;
241
242 list_for_each_entry(wdev, &rdev->netdev_list, list) {
243 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
244 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
245 if (err)
246 break;
247 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
248 }
249
250 if (err) {
251
252 net = wiphy_net(&rdev->wiphy);
253
254 list_for_each_entry_continue_reverse(wdev, &rdev->netdev_list,
255 list) {
256 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
257 err = dev_change_net_namespace(wdev->netdev, net,
258 "wlan%d");
259 WARN_ON(err);
260 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
261 }
262
263 return err;
264 }
265
266 wiphy_net_set(&rdev->wiphy, net);
267
268 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev));
269 WARN_ON(err);
270
271 return 0;
272}
273
274static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
275{
276 struct cfg80211_registered_device *rdev = data;
277
278 rdev->ops->rfkill_poll(&rdev->wiphy);
279}
280
281static int cfg80211_rfkill_set_block(void *data, bool blocked)
282{
283 struct cfg80211_registered_device *rdev = data;
284 struct wireless_dev *wdev;
285
286 if (!blocked)
287 return 0;
288
289 rtnl_lock();
290 mutex_lock(&rdev->devlist_mtx);
291
292 list_for_each_entry(wdev, &rdev->netdev_list, list)
293 dev_close(wdev->netdev);
294
295 mutex_unlock(&rdev->devlist_mtx);
296 rtnl_unlock();
297
298 return 0;
299}
300
301static void cfg80211_rfkill_sync_work(struct work_struct *work)
302{
303 struct cfg80211_registered_device *rdev;
304
305 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync);
306 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
307}
308
309static void cfg80211_event_work(struct work_struct *work)
310{
311 struct cfg80211_registered_device *rdev;
312
313 rdev = container_of(work, struct cfg80211_registered_device,
314 event_work);
315
316 rtnl_lock();
317 cfg80211_lock_rdev(rdev);
318
319 cfg80211_process_rdev_events(rdev);
320 cfg80211_unlock_rdev(rdev);
321 rtnl_unlock();
322}
323
324
325
326struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
327{
328 static int wiphy_counter;
329
330 struct cfg80211_registered_device *rdev;
331 int alloc_size;
332
333 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
334 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
335 WARN_ON(ops->connect && !ops->disconnect);
336 WARN_ON(ops->join_ibss && !ops->leave_ibss);
337 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
338 WARN_ON(ops->add_station && !ops->del_station);
339 WARN_ON(ops->add_mpath && !ops->del_mpath);
340 WARN_ON(ops->join_mesh && !ops->leave_mesh);
341
342 alloc_size = sizeof(*rdev) + sizeof_priv;
343
344 rdev = kzalloc(alloc_size, GFP_KERNEL);
345 if (!rdev)
346 return NULL;
347
348 rdev->ops = ops;
349
350 mutex_lock(&cfg80211_mutex);
351
352 rdev->wiphy_idx = wiphy_counter++;
353
354 if (unlikely(!wiphy_idx_valid(rdev->wiphy_idx))) {
355 wiphy_counter--;
356 mutex_unlock(&cfg80211_mutex);
357
358 kfree(rdev);
359 return NULL;
360 }
361
362 mutex_unlock(&cfg80211_mutex);
363
364
365 dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
366
367 mutex_init(&rdev->mtx);
368 mutex_init(&rdev->devlist_mtx);
369 mutex_init(&rdev->sched_scan_mtx);
370 INIT_LIST_HEAD(&rdev->netdev_list);
371 spin_lock_init(&rdev->bss_lock);
372 INIT_LIST_HEAD(&rdev->bss_list);
373 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
374 INIT_WORK(&rdev->sched_scan_results_wk, __cfg80211_sched_scan_results);
375#ifdef CONFIG_CFG80211_WEXT
376 rdev->wiphy.wext = &cfg80211_wext_handler;
377#endif
378
379 device_initialize(&rdev->wiphy.dev);
380 rdev->wiphy.dev.class = &ieee80211_class;
381 rdev->wiphy.dev.platform_data = rdev;
382
383#ifdef CONFIG_CFG80211_DEFAULT_PS
384 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
385#endif
386
387 wiphy_net_set(&rdev->wiphy, &init_net);
388
389 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
390 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
391 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
392 &rdev->rfkill_ops, rdev);
393
394 if (!rdev->rfkill) {
395 kfree(rdev);
396 return NULL;
397 }
398
399 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
400 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
401 INIT_WORK(&rdev->event_work, cfg80211_event_work);
402
403 init_waitqueue_head(&rdev->dev_wait);
404
405
406
407
408
409
410 rdev->wiphy.retry_short = 7;
411 rdev->wiphy.retry_long = 4;
412 rdev->wiphy.frag_threshold = (u32) -1;
413 rdev->wiphy.rts_threshold = (u32) -1;
414 rdev->wiphy.coverage_class = 0;
415
416 return &rdev->wiphy;
417}
418EXPORT_SYMBOL(wiphy_new);
419
420static int wiphy_verify_combinations(struct wiphy *wiphy)
421{
422 const struct ieee80211_iface_combination *c;
423 int i, j;
424
425
426 if (wiphy->n_iface_combinations)
427 wiphy->flags |= WIPHY_FLAG_ENFORCE_COMBINATIONS;
428
429 for (i = 0; i < wiphy->n_iface_combinations; i++) {
430 u32 cnt = 0;
431 u16 all_iftypes = 0;
432
433 c = &wiphy->iface_combinations[i];
434
435
436 if (WARN_ON(c->max_interfaces < 2))
437 return -EINVAL;
438
439
440 if (WARN_ON(!c->num_different_channels))
441 return -EINVAL;
442
443 if (WARN_ON(!c->n_limits))
444 return -EINVAL;
445
446 for (j = 0; j < c->n_limits; j++) {
447 u16 types = c->limits[j].types;
448
449
450
451
452
453 if (WARN_ON(types & all_iftypes))
454 return -EINVAL;
455 all_iftypes |= types;
456
457 if (WARN_ON(!c->limits[j].max))
458 return -EINVAL;
459
460
461 if (WARN_ON(wiphy->software_iftypes & types))
462 return -EINVAL;
463
464 cnt += c->limits[j].max;
465
466
467
468
469 if (WARN_ON((wiphy->interface_modes & types) != types))
470 return -EINVAL;
471 }
472
473
474 if (WARN_ON(cnt < c->max_interfaces))
475 return -EINVAL;
476 }
477
478 return 0;
479}
480
481int wiphy_register(struct wiphy *wiphy)
482{
483 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
484 int res;
485 enum ieee80211_band band;
486 struct ieee80211_supported_band *sband;
487 bool have_band = false;
488 int i;
489 u16 ifmodes = wiphy->interface_modes;
490
491 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
492 return -EINVAL;
493
494 if (WARN_ON(wiphy->addresses &&
495 !is_zero_ether_addr(wiphy->perm_addr) &&
496 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
497 ETH_ALEN)))
498 return -EINVAL;
499
500 if (wiphy->addresses)
501 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
502
503
504 WARN_ON(!ifmodes);
505 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
506 if (WARN_ON(ifmodes != wiphy->interface_modes))
507 wiphy->interface_modes = ifmodes;
508
509 res = wiphy_verify_combinations(wiphy);
510 if (res)
511 return res;
512
513
514 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
515 sband = wiphy->bands[band];
516 if (!sband)
517 continue;
518
519 sband->band = band;
520
521 if (WARN_ON(!sband->n_channels || !sband->n_bitrates))
522 return -EINVAL;
523
524
525
526
527
528
529 if (cfg80211_disable_40mhz_24ghz &&
530 band == IEEE80211_BAND_2GHZ &&
531 sband->ht_cap.ht_supported) {
532 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
533 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
534 }
535
536
537
538
539
540
541 if (WARN_ON(sband->n_bitrates > 32))
542 return -EINVAL;
543
544 for (i = 0; i < sband->n_channels; i++) {
545 sband->channels[i].orig_flags =
546 sband->channels[i].flags;
547 sband->channels[i].orig_mag =
548 sband->channels[i].max_antenna_gain;
549 sband->channels[i].orig_mpwr =
550 sband->channels[i].max_power;
551 sband->channels[i].band = band;
552 }
553
554 have_band = true;
555 }
556
557 if (!have_band) {
558 WARN_ON(1);
559 return -EINVAL;
560 }
561
562 if (rdev->wiphy.wowlan.n_patterns) {
563 if (WARN_ON(!rdev->wiphy.wowlan.pattern_min_len ||
564 rdev->wiphy.wowlan.pattern_min_len >
565 rdev->wiphy.wowlan.pattern_max_len))
566 return -EINVAL;
567 }
568
569
570 ieee80211_set_bitrate_flags(wiphy);
571
572 mutex_lock(&cfg80211_mutex);
573
574 res = device_add(&rdev->wiphy.dev);
575 if (res) {
576 mutex_unlock(&cfg80211_mutex);
577 return res;
578 }
579
580
581 wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE);
582
583 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
584 cfg80211_rdev_list_generation++;
585
586
587 rdev->wiphy.debugfsdir =
588 debugfs_create_dir(wiphy_name(&rdev->wiphy),
589 ieee80211_debugfs_dir);
590 if (IS_ERR(rdev->wiphy.debugfsdir))
591 rdev->wiphy.debugfsdir = NULL;
592
593 if (wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) {
594 struct regulatory_request request;
595
596 request.wiphy_idx = get_wiphy_idx(wiphy);
597 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
598 request.alpha2[0] = '9';
599 request.alpha2[1] = '9';
600
601 nl80211_send_reg_change_event(&request);
602 }
603
604 cfg80211_debugfs_rdev_add(rdev);
605 mutex_unlock(&cfg80211_mutex);
606
607
608
609
610
611 res = rfkill_register(rdev->rfkill);
612 if (res)
613 goto out_rm_dev;
614
615 return 0;
616
617out_rm_dev:
618 device_del(&rdev->wiphy.dev);
619 return res;
620}
621EXPORT_SYMBOL(wiphy_register);
622
623void wiphy_rfkill_start_polling(struct wiphy *wiphy)
624{
625 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
626
627 if (!rdev->ops->rfkill_poll)
628 return;
629 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
630 rfkill_resume_polling(rdev->rfkill);
631}
632EXPORT_SYMBOL(wiphy_rfkill_start_polling);
633
634void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
635{
636 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
637
638 rfkill_pause_polling(rdev->rfkill);
639}
640EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
641
642void wiphy_unregister(struct wiphy *wiphy)
643{
644 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
645
646 rfkill_unregister(rdev->rfkill);
647
648
649 mutex_lock(&cfg80211_mutex);
650
651 wait_event(rdev->dev_wait, ({
652 int __count;
653 mutex_lock(&rdev->devlist_mtx);
654 __count = rdev->opencount;
655 mutex_unlock(&rdev->devlist_mtx);
656 __count == 0;}));
657
658 mutex_lock(&rdev->devlist_mtx);
659 BUG_ON(!list_empty(&rdev->netdev_list));
660 mutex_unlock(&rdev->devlist_mtx);
661
662
663
664
665
666 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
667 list_del_rcu(&rdev->list);
668 synchronize_rcu();
669
670
671
672
673
674
675
676
677
678
679
680 cfg80211_lock_rdev(rdev);
681
682 cfg80211_unlock_rdev(rdev);
683
684
685
686 reg_device_remove(wiphy);
687
688 cfg80211_rdev_list_generation++;
689 device_del(&rdev->wiphy.dev);
690
691 mutex_unlock(&cfg80211_mutex);
692
693 flush_work(&rdev->scan_done_wk);
694 cancel_work_sync(&rdev->conn_work);
695 flush_work(&rdev->event_work);
696}
697EXPORT_SYMBOL(wiphy_unregister);
698
699void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
700{
701 struct cfg80211_internal_bss *scan, *tmp;
702 rfkill_destroy(rdev->rfkill);
703 mutex_destroy(&rdev->mtx);
704 mutex_destroy(&rdev->devlist_mtx);
705 mutex_destroy(&rdev->sched_scan_mtx);
706 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
707 cfg80211_put_bss(&scan->pub);
708 cfg80211_rdev_free_wowlan(rdev);
709 kfree(rdev);
710}
711
712void wiphy_free(struct wiphy *wiphy)
713{
714 put_device(&wiphy->dev);
715}
716EXPORT_SYMBOL(wiphy_free);
717
718void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
719{
720 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
721
722 if (rfkill_set_hw_state(rdev->rfkill, blocked))
723 schedule_work(&rdev->rfkill_sync);
724}
725EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
726
727static void wdev_cleanup_work(struct work_struct *work)
728{
729 struct wireless_dev *wdev;
730 struct cfg80211_registered_device *rdev;
731
732 wdev = container_of(work, struct wireless_dev, cleanup_work);
733 rdev = wiphy_to_dev(wdev->wiphy);
734
735 cfg80211_lock_rdev(rdev);
736
737 if (WARN_ON(rdev->scan_req && rdev->scan_req->dev == wdev->netdev)) {
738 rdev->scan_req->aborted = true;
739 ___cfg80211_scan_done(rdev, true);
740 }
741
742 cfg80211_unlock_rdev(rdev);
743
744 mutex_lock(&rdev->sched_scan_mtx);
745
746 if (WARN_ON(rdev->sched_scan_req &&
747 rdev->sched_scan_req->dev == wdev->netdev)) {
748 __cfg80211_stop_sched_scan(rdev, false);
749 }
750
751 mutex_unlock(&rdev->sched_scan_mtx);
752
753 mutex_lock(&rdev->devlist_mtx);
754 rdev->opencount--;
755 mutex_unlock(&rdev->devlist_mtx);
756 wake_up(&rdev->dev_wait);
757
758 dev_put(wdev->netdev);
759}
760
761static struct device_type wiphy_type = {
762 .name = "wlan",
763};
764
765static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
766 unsigned long state,
767 void *ndev)
768{
769 struct net_device *dev = ndev;
770 struct wireless_dev *wdev = dev->ieee80211_ptr;
771 struct cfg80211_registered_device *rdev;
772 int ret;
773
774 if (!wdev)
775 return NOTIFY_DONE;
776
777 rdev = wiphy_to_dev(wdev->wiphy);
778
779 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
780
781 switch (state) {
782 case NETDEV_POST_INIT:
783 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
784 break;
785 case NETDEV_REGISTER:
786
787
788
789
790
791 mutex_init(&wdev->mtx);
792 INIT_WORK(&wdev->cleanup_work, wdev_cleanup_work);
793 INIT_LIST_HEAD(&wdev->event_list);
794 spin_lock_init(&wdev->event_lock);
795 INIT_LIST_HEAD(&wdev->mgmt_registrations);
796 spin_lock_init(&wdev->mgmt_registrations_lock);
797
798 mutex_lock(&rdev->devlist_mtx);
799 list_add_rcu(&wdev->list, &rdev->netdev_list);
800 rdev->devlist_generation++;
801
802 dev->features |= NETIF_F_NETNS_LOCAL;
803
804 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
805 "phy80211")) {
806 pr_err("failed to add phy80211 symlink to netdev!\n");
807 }
808 wdev->netdev = dev;
809 wdev->sme_state = CFG80211_SME_IDLE;
810 mutex_unlock(&rdev->devlist_mtx);
811#ifdef CONFIG_CFG80211_WEXT
812 wdev->wext.default_key = -1;
813 wdev->wext.default_mgmt_key = -1;
814 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
815#endif
816
817 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
818 wdev->ps = true;
819 else
820 wdev->ps = false;
821
822 wdev->ps_timeout = -1;
823
824 if (!dev->ethtool_ops)
825 dev->ethtool_ops = &cfg80211_ethtool_ops;
826
827 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
828 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
829 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
830 dev->priv_flags |= IFF_DONT_BRIDGE;
831 break;
832 case NETDEV_GOING_DOWN:
833 switch (wdev->iftype) {
834 case NL80211_IFTYPE_ADHOC:
835 cfg80211_leave_ibss(rdev, dev, true);
836 break;
837 case NL80211_IFTYPE_P2P_CLIENT:
838 case NL80211_IFTYPE_STATION:
839 mutex_lock(&rdev->sched_scan_mtx);
840 __cfg80211_stop_sched_scan(rdev, false);
841 mutex_unlock(&rdev->sched_scan_mtx);
842
843 wdev_lock(wdev);
844#ifdef CONFIG_CFG80211_WEXT
845 kfree(wdev->wext.ie);
846 wdev->wext.ie = NULL;
847 wdev->wext.ie_len = 0;
848 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
849#endif
850 __cfg80211_disconnect(rdev, dev,
851 WLAN_REASON_DEAUTH_LEAVING, true);
852 cfg80211_mlme_down(rdev, dev);
853 wdev_unlock(wdev);
854 break;
855 case NL80211_IFTYPE_MESH_POINT:
856 cfg80211_leave_mesh(rdev, dev);
857 break;
858 default:
859 break;
860 }
861 wdev->beacon_interval = 0;
862 break;
863 case NETDEV_DOWN:
864 dev_hold(dev);
865 queue_work(cfg80211_wq, &wdev->cleanup_work);
866 break;
867 case NETDEV_UP:
868
869
870
871
872
873
874 if (cancel_work_sync(&wdev->cleanup_work)) {
875 mutex_lock(&rdev->devlist_mtx);
876 rdev->opencount--;
877 mutex_unlock(&rdev->devlist_mtx);
878 dev_put(dev);
879 }
880 cfg80211_lock_rdev(rdev);
881 mutex_lock(&rdev->devlist_mtx);
882 wdev_lock(wdev);
883 switch (wdev->iftype) {
884#ifdef CONFIG_CFG80211_WEXT
885 case NL80211_IFTYPE_ADHOC:
886 cfg80211_ibss_wext_join(rdev, wdev);
887 break;
888 case NL80211_IFTYPE_STATION:
889 cfg80211_mgd_wext_connect(rdev, wdev);
890 break;
891#endif
892#ifdef CONFIG_MAC80211_MESH
893 case NL80211_IFTYPE_MESH_POINT:
894 {
895
896 struct mesh_setup setup;
897 memcpy(&setup, &default_mesh_setup,
898 sizeof(setup));
899
900 setup.mesh_id = wdev->ssid;
901 setup.mesh_id_len = wdev->mesh_id_up_len;
902 if (wdev->mesh_id_up_len)
903 __cfg80211_join_mesh(rdev, dev,
904 &setup,
905 &default_mesh_config);
906 break;
907 }
908#endif
909 default:
910 break;
911 }
912 wdev_unlock(wdev);
913 rdev->opencount++;
914 mutex_unlock(&rdev->devlist_mtx);
915 cfg80211_unlock_rdev(rdev);
916
917
918
919
920
921 if (wdev->iftype == NL80211_IFTYPE_STATION &&
922 rdev->ops->set_power_mgmt)
923 if (rdev->ops->set_power_mgmt(wdev->wiphy, dev,
924 wdev->ps,
925 wdev->ps_timeout)) {
926
927 wdev->ps = false;
928 }
929 break;
930 case NETDEV_UNREGISTER:
931
932
933
934
935
936 mutex_lock(&rdev->devlist_mtx);
937
938
939
940
941
942
943
944 if (!list_empty(&wdev->list)) {
945 sysfs_remove_link(&dev->dev.kobj, "phy80211");
946 list_del_rcu(&wdev->list);
947 rdev->devlist_generation++;
948 cfg80211_mlme_purge_registrations(wdev);
949#ifdef CONFIG_CFG80211_WEXT
950 kfree(wdev->wext.keys);
951#endif
952 }
953 mutex_unlock(&rdev->devlist_mtx);
954
955
956
957
958
959
960 synchronize_rcu();
961 INIT_LIST_HEAD(&wdev->list);
962 break;
963 case NETDEV_PRE_UP:
964 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
965 return notifier_from_errno(-EOPNOTSUPP);
966 if (rfkill_blocked(rdev->rfkill))
967 return notifier_from_errno(-ERFKILL);
968 ret = cfg80211_can_add_interface(rdev, wdev->iftype);
969 if (ret)
970 return notifier_from_errno(ret);
971 break;
972 }
973
974 return NOTIFY_DONE;
975}
976
977static struct notifier_block cfg80211_netdev_notifier = {
978 .notifier_call = cfg80211_netdev_notifier_call,
979};
980
981static void __net_exit cfg80211_pernet_exit(struct net *net)
982{
983 struct cfg80211_registered_device *rdev;
984
985 rtnl_lock();
986 mutex_lock(&cfg80211_mutex);
987 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
988 if (net_eq(wiphy_net(&rdev->wiphy), net))
989 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
990 }
991 mutex_unlock(&cfg80211_mutex);
992 rtnl_unlock();
993}
994
995static struct pernet_operations cfg80211_pernet_ops = {
996 .exit = cfg80211_pernet_exit,
997};
998
999static int __init cfg80211_init(void)
1000{
1001 int err;
1002
1003 err = register_pernet_device(&cfg80211_pernet_ops);
1004 if (err)
1005 goto out_fail_pernet;
1006
1007 err = wiphy_sysfs_init();
1008 if (err)
1009 goto out_fail_sysfs;
1010
1011 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
1012 if (err)
1013 goto out_fail_notifier;
1014
1015 err = nl80211_init();
1016 if (err)
1017 goto out_fail_nl80211;
1018
1019 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
1020
1021 err = regulatory_init();
1022 if (err)
1023 goto out_fail_reg;
1024
1025 cfg80211_wq = create_singlethread_workqueue("cfg80211");
1026 if (!cfg80211_wq)
1027 goto out_fail_wq;
1028
1029 return 0;
1030
1031out_fail_wq:
1032 regulatory_exit();
1033out_fail_reg:
1034 debugfs_remove(ieee80211_debugfs_dir);
1035out_fail_nl80211:
1036 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1037out_fail_notifier:
1038 wiphy_sysfs_exit();
1039out_fail_sysfs:
1040 unregister_pernet_device(&cfg80211_pernet_ops);
1041out_fail_pernet:
1042 return err;
1043}
1044subsys_initcall(cfg80211_init);
1045
1046static void __exit cfg80211_exit(void)
1047{
1048 debugfs_remove(ieee80211_debugfs_dir);
1049 nl80211_exit();
1050 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1051 wiphy_sysfs_exit();
1052 regulatory_exit();
1053 unregister_pernet_device(&cfg80211_pernet_ops);
1054 destroy_workqueue(cfg80211_wq);
1055}
1056module_exit(cfg80211_exit);
1057