cfg80211: clean up naming once and for all
[linux-2.6.git] / net / wireless / core.c
1 /*
2  * This is the linux wireless configuration interface.
3  *
4  * Copyright 2006-2009          Johannes Berg <johannes@sipsolutions.net>
5  */
6
7 #include <linux/if.h>
8 #include <linux/module.h>
9 #include <linux/err.h>
10 #include <linux/list.h>
11 #include <linux/nl80211.h>
12 #include <linux/debugfs.h>
13 #include <linux/notifier.h>
14 #include <linux/device.h>
15 #include <linux/rtnetlink.h>
16 #include <net/genetlink.h>
17 #include <net/cfg80211.h>
18 #include "nl80211.h"
19 #include "core.h"
20 #include "sysfs.h"
21 #include "debugfs.h"
22
23 /* name for sysfs, %d is appended */
24 #define PHY_NAME "phy"
25
26 MODULE_AUTHOR("Johannes Berg");
27 MODULE_LICENSE("GPL");
28 MODULE_DESCRIPTION("wireless configuration support");
29
30 /* RCU might be appropriate here since we usually
31  * only read the list, and that can happen quite
32  * often because we need to do it for each command */
33 LIST_HEAD(cfg80211_rdev_list);
34
35 /*
36  * This is used to protect the cfg80211_rdev_list, cfg80211_regdomain,
37  * country_ie_regdomain, the reg_beacon_list and the the last regulatory
38  * request receipt (last_request).
39  */
40 DEFINE_MUTEX(cfg80211_mutex);
41
42 /* for debugfs */
43 static struct dentry *ieee80211_debugfs_dir;
44
45 /* requires cfg80211_mutex to be held! */
46 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
47 {
48         struct cfg80211_registered_device *result = NULL, *rdev;
49
50         if (!wiphy_idx_valid(wiphy_idx))
51                 return NULL;
52
53         assert_cfg80211_lock();
54
55         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
56                 if (rdev->wiphy_idx == wiphy_idx) {
57                         result = rdev;
58                         break;
59                 }
60         }
61
62         return result;
63 }
64
65 int get_wiphy_idx(struct wiphy *wiphy)
66 {
67         struct cfg80211_registered_device *rdev;
68         if (!wiphy)
69                 return WIPHY_IDX_STALE;
70         rdev = wiphy_to_dev(wiphy);
71         return rdev->wiphy_idx;
72 }
73
74 /* requires cfg80211_rdev_mutex to be held! */
75 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
76 {
77         struct cfg80211_registered_device *rdev;
78
79         if (!wiphy_idx_valid(wiphy_idx))
80                 return NULL;
81
82         assert_cfg80211_lock();
83
84         rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
85         if (!rdev)
86                 return NULL;
87         return &rdev->wiphy;
88 }
89
90 /* requires cfg80211_mutex to be held! */
91 struct cfg80211_registered_device *
92 __cfg80211_rdev_from_info(struct genl_info *info)
93 {
94         int ifindex;
95         struct cfg80211_registered_device *bywiphyidx = NULL, *byifidx = NULL;
96         struct net_device *dev;
97         int err = -EINVAL;
98
99         assert_cfg80211_lock();
100
101         if (info->attrs[NL80211_ATTR_WIPHY]) {
102                 bywiphyidx = cfg80211_rdev_by_wiphy_idx(
103                                 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY]));
104                 err = -ENODEV;
105         }
106
107         if (info->attrs[NL80211_ATTR_IFINDEX]) {
108                 ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
109                 dev = dev_get_by_index(&init_net, ifindex);
110                 if (dev) {
111                         if (dev->ieee80211_ptr)
112                                 byifidx =
113                                         wiphy_to_dev(dev->ieee80211_ptr->wiphy);
114                         dev_put(dev);
115                 }
116                 err = -ENODEV;
117         }
118
119         if (bywiphyidx && byifidx) {
120                 if (bywiphyidx != byifidx)
121                         return ERR_PTR(-EINVAL);
122                 else
123                         return bywiphyidx; /* == byifidx */
124         }
125         if (bywiphyidx)
126                 return bywiphyidx;
127
128         if (byifidx)
129                 return byifidx;
130
131         return ERR_PTR(err);
132 }
133
134 struct cfg80211_registered_device *
135 cfg80211_get_dev_from_info(struct genl_info *info)
136 {
137         struct cfg80211_registered_device *rdev;
138
139         mutex_lock(&cfg80211_mutex);
140         rdev = __cfg80211_rdev_from_info(info);
141
142         /* if it is not an error we grab the lock on
143          * it to assure it won't be going away while
144          * we operate on it */
145         if (!IS_ERR(rdev))
146                 mutex_lock(&rdev->mtx);
147
148         mutex_unlock(&cfg80211_mutex);
149
150         return rdev;
151 }
152
153 struct cfg80211_registered_device *
154 cfg80211_get_dev_from_ifindex(int ifindex)
155 {
156         struct cfg80211_registered_device *rdev = ERR_PTR(-ENODEV);
157         struct net_device *dev;
158
159         mutex_lock(&cfg80211_mutex);
160         dev = dev_get_by_index(&init_net, ifindex);
161         if (!dev)
162                 goto out;
163         if (dev->ieee80211_ptr) {
164                 rdev = wiphy_to_dev(dev->ieee80211_ptr->wiphy);
165                 mutex_lock(&rdev->mtx);
166         } else
167                 rdev = ERR_PTR(-ENODEV);
168         dev_put(dev);
169  out:
170         mutex_unlock(&cfg80211_mutex);
171         return rdev;
172 }
173
174 /* requires cfg80211_mutex to be held */
175 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
176                         char *newname)
177 {
178         struct cfg80211_registered_device *rdev2;
179         int wiphy_idx, taken = -1, result, digits;
180
181         assert_cfg80211_lock();
182
183         /* prohibit calling the thing phy%d when %d is not its number */
184         sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
185         if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
186                 /* count number of places needed to print wiphy_idx */
187                 digits = 1;
188                 while (wiphy_idx /= 10)
189                         digits++;
190                 /*
191                  * deny the name if it is phy<idx> where <idx> is printed
192                  * without leading zeroes. taken == strlen(newname) here
193                  */
194                 if (taken == strlen(PHY_NAME) + digits)
195                         return -EINVAL;
196         }
197
198
199         /* Ignore nop renames */
200         if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0)
201                 return 0;
202
203         /* Ensure another device does not already have this name. */
204         list_for_each_entry(rdev2, &cfg80211_rdev_list, list)
205                 if (strcmp(newname, dev_name(&rdev2->wiphy.dev)) == 0)
206                         return -EINVAL;
207
208         result = device_rename(&rdev->wiphy.dev, newname);
209         if (result)
210                 return result;
211
212         if (rdev->wiphy.debugfsdir &&
213             !debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
214                             rdev->wiphy.debugfsdir,
215                             rdev->wiphy.debugfsdir->d_parent,
216                             newname))
217                 printk(KERN_ERR "cfg80211: failed to rename debugfs dir to %s!\n",
218                        newname);
219
220         nl80211_notify_dev_rename(rdev);
221
222         return 0;
223 }
224
225 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
226 {
227         struct cfg80211_registered_device *rdev = data;
228
229         rdev->ops->rfkill_poll(&rdev->wiphy);
230 }
231
232 static int cfg80211_rfkill_set_block(void *data, bool blocked)
233 {
234         struct cfg80211_registered_device *rdev = data;
235         struct wireless_dev *wdev;
236
237         if (!blocked)
238                 return 0;
239
240         rtnl_lock();
241         mutex_lock(&rdev->devlist_mtx);
242
243         list_for_each_entry(wdev, &rdev->netdev_list, list)
244                 dev_close(wdev->netdev);
245
246         mutex_unlock(&rdev->devlist_mtx);
247         rtnl_unlock();
248
249         return 0;
250 }
251
252 static void cfg80211_rfkill_sync_work(struct work_struct *work)
253 {
254         struct cfg80211_registered_device *rdev;
255
256         rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync);
257         cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
258 }
259
260 static void cfg80211_process_events(struct wireless_dev *wdev)
261 {
262         struct cfg80211_event *ev;
263         unsigned long flags;
264
265         spin_lock_irqsave(&wdev->event_lock, flags);
266         while (!list_empty(&wdev->event_list)) {
267                 ev = list_first_entry(&wdev->event_list,
268                                       struct cfg80211_event, list);
269                 list_del(&ev->list);
270                 spin_unlock_irqrestore(&wdev->event_lock, flags);
271
272                 wdev_lock(wdev);
273                 switch (ev->type) {
274                 case EVENT_CONNECT_RESULT:
275                         __cfg80211_connect_result(
276                                 wdev->netdev, ev->cr.bssid,
277                                 ev->cr.req_ie, ev->cr.req_ie_len,
278                                 ev->cr.resp_ie, ev->cr.resp_ie_len,
279                                 ev->cr.status,
280                                 ev->cr.status == WLAN_STATUS_SUCCESS);
281                         break;
282                 case EVENT_ROAMED:
283                         __cfg80211_roamed(wdev, ev->rm.bssid,
284                                           ev->rm.req_ie, ev->rm.req_ie_len,
285                                           ev->rm.resp_ie, ev->rm.resp_ie_len);
286                         break;
287                 case EVENT_DISCONNECTED:
288                         __cfg80211_disconnected(wdev->netdev,
289                                                 ev->dc.ie, ev->dc.ie_len,
290                                                 ev->dc.reason, true);
291                         break;
292                 case EVENT_IBSS_JOINED:
293                         __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid);
294                         break;
295                 }
296                 wdev_unlock(wdev);
297
298                 kfree(ev);
299
300                 spin_lock_irqsave(&wdev->event_lock, flags);
301         }
302         spin_unlock_irqrestore(&wdev->event_lock, flags);
303 }
304
305 static void cfg80211_event_work(struct work_struct *work)
306 {
307         struct cfg80211_registered_device *rdev;
308         struct wireless_dev *wdev;
309
310         rdev = container_of(work, struct cfg80211_registered_device,
311                             event_work);
312
313         rtnl_lock();
314         cfg80211_lock_rdev(rdev);
315         mutex_lock(&rdev->devlist_mtx);
316
317         list_for_each_entry(wdev, &rdev->netdev_list, list)
318                 cfg80211_process_events(wdev);
319
320         mutex_unlock(&rdev->devlist_mtx);
321         cfg80211_unlock_rdev(rdev);
322         rtnl_unlock();
323 }
324
325 /* exported functions */
326
327 struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
328 {
329         static int wiphy_counter;
330
331         struct cfg80211_registered_device *rdev;
332         int alloc_size;
333
334         WARN_ON(!ops->add_key && ops->del_key);
335         WARN_ON(ops->add_key && !ops->del_key);
336
337         alloc_size = sizeof(*rdev) + sizeof_priv;
338
339         rdev = kzalloc(alloc_size, GFP_KERNEL);
340         if (!rdev)
341                 return NULL;
342
343         rdev->ops = ops;
344
345         mutex_lock(&cfg80211_mutex);
346
347         rdev->wiphy_idx = wiphy_counter++;
348
349         if (unlikely(!wiphy_idx_valid(rdev->wiphy_idx))) {
350                 wiphy_counter--;
351                 mutex_unlock(&cfg80211_mutex);
352                 /* ugh, wrapped! */
353                 kfree(rdev);
354                 return NULL;
355         }
356
357         mutex_unlock(&cfg80211_mutex);
358
359         /* give it a proper name */
360         dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
361
362         mutex_init(&rdev->mtx);
363         mutex_init(&rdev->devlist_mtx);
364         INIT_LIST_HEAD(&rdev->netdev_list);
365         spin_lock_init(&rdev->bss_lock);
366         INIT_LIST_HEAD(&rdev->bss_list);
367         INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
368
369         device_initialize(&rdev->wiphy.dev);
370         rdev->wiphy.dev.class = &ieee80211_class;
371         rdev->wiphy.dev.platform_data = rdev;
372
373         rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
374         rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
375                                    &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
376                                    &rdev->rfkill_ops, rdev);
377
378         if (!rdev->rfkill) {
379                 kfree(rdev);
380                 return NULL;
381         }
382
383         INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
384         INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
385         INIT_WORK(&rdev->event_work, cfg80211_event_work);
386
387         /*
388          * Initialize wiphy parameters to IEEE 802.11 MIB default values.
389          * Fragmentation and RTS threshold are disabled by default with the
390          * special -1 value.
391          */
392         rdev->wiphy.retry_short = 7;
393         rdev->wiphy.retry_long = 4;
394         rdev->wiphy.frag_threshold = (u32) -1;
395         rdev->wiphy.rts_threshold = (u32) -1;
396
397         return &rdev->wiphy;
398 }
399 EXPORT_SYMBOL(wiphy_new);
400
401 int wiphy_register(struct wiphy *wiphy)
402 {
403         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
404         int res;
405         enum ieee80211_band band;
406         struct ieee80211_supported_band *sband;
407         bool have_band = false;
408         int i;
409         u16 ifmodes = wiphy->interface_modes;
410
411         /* sanity check ifmodes */
412         WARN_ON(!ifmodes);
413         ifmodes &= ((1 << __NL80211_IFTYPE_AFTER_LAST) - 1) & ~1;
414         if (WARN_ON(ifmodes != wiphy->interface_modes))
415                 wiphy->interface_modes = ifmodes;
416
417         /* sanity check supported bands/channels */
418         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
419                 sband = wiphy->bands[band];
420                 if (!sband)
421                         continue;
422
423                 sband->band = band;
424
425                 if (WARN_ON(!sband->n_channels || !sband->n_bitrates))
426                         return -EINVAL;
427
428                 /*
429                  * Since we use a u32 for rate bitmaps in
430                  * ieee80211_get_response_rate, we cannot
431                  * have more than 32 legacy rates.
432                  */
433                 if (WARN_ON(sband->n_bitrates > 32))
434                         return -EINVAL;
435
436                 for (i = 0; i < sband->n_channels; i++) {
437                         sband->channels[i].orig_flags =
438                                 sband->channels[i].flags;
439                         sband->channels[i].orig_mag =
440                                 sband->channels[i].max_antenna_gain;
441                         sband->channels[i].orig_mpwr =
442                                 sband->channels[i].max_power;
443                         sband->channels[i].band = band;
444                 }
445
446                 have_band = true;
447         }
448
449         if (!have_band) {
450                 WARN_ON(1);
451                 return -EINVAL;
452         }
453
454         /* check and set up bitrates */
455         ieee80211_set_bitrate_flags(wiphy);
456
457         res = device_add(&rdev->wiphy.dev);
458         if (res)
459                 return res;
460
461         res = rfkill_register(rdev->rfkill);
462         if (res)
463                 goto out_rm_dev;
464
465         mutex_lock(&cfg80211_mutex);
466
467         /* set up regulatory info */
468         wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE);
469
470         list_add(&rdev->list, &cfg80211_rdev_list);
471
472         mutex_unlock(&cfg80211_mutex);
473
474         /* add to debugfs */
475         rdev->wiphy.debugfsdir =
476                 debugfs_create_dir(wiphy_name(&rdev->wiphy),
477                                    ieee80211_debugfs_dir);
478         if (IS_ERR(rdev->wiphy.debugfsdir))
479                 rdev->wiphy.debugfsdir = NULL;
480
481         if (wiphy->custom_regulatory) {
482                 struct regulatory_request request;
483
484                 request.wiphy_idx = get_wiphy_idx(wiphy);
485                 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
486                 request.alpha2[0] = '9';
487                 request.alpha2[1] = '9';
488
489                 nl80211_send_reg_change_event(&request);
490         }
491
492         cfg80211_debugfs_rdev_add(rdev);
493
494         return 0;
495
496  out_rm_dev:
497         device_del(&rdev->wiphy.dev);
498         return res;
499 }
500 EXPORT_SYMBOL(wiphy_register);
501
502 void wiphy_rfkill_start_polling(struct wiphy *wiphy)
503 {
504         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
505
506         if (!rdev->ops->rfkill_poll)
507                 return;
508         rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
509         rfkill_resume_polling(rdev->rfkill);
510 }
511 EXPORT_SYMBOL(wiphy_rfkill_start_polling);
512
513 void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
514 {
515         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
516
517         rfkill_pause_polling(rdev->rfkill);
518 }
519 EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
520
521 void wiphy_unregister(struct wiphy *wiphy)
522 {
523         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
524
525         rfkill_unregister(rdev->rfkill);
526
527         /* protect the device list */
528         mutex_lock(&cfg80211_mutex);
529
530         BUG_ON(!list_empty(&rdev->netdev_list));
531
532         /*
533          * Try to grab rdev->mtx. If a command is still in progress,
534          * hopefully the driver will refuse it since it's tearing
535          * down the device already. We wait for this command to complete
536          * before unlinking the item from the list.
537          * Note: as codified by the BUG_ON above we cannot get here if
538          * a virtual interface is still associated. Hence, we can only
539          * get to lock contention here if userspace issues a command
540          * that identified the hardware by wiphy index.
541          */
542         mutex_lock(&rdev->mtx);
543         /* unlock again before freeing */
544         mutex_unlock(&rdev->mtx);
545
546         cancel_work_sync(&rdev->conn_work);
547         cancel_work_sync(&rdev->scan_done_wk);
548         kfree(rdev->scan_req);
549         flush_work(&rdev->event_work);
550
551         cfg80211_debugfs_rdev_del(rdev);
552
553         /* If this device got a regulatory hint tell core its
554          * free to listen now to a new shiny device regulatory hint */
555         reg_device_remove(wiphy);
556
557         list_del(&rdev->list);
558         device_del(&rdev->wiphy.dev);
559         debugfs_remove(rdev->wiphy.debugfsdir);
560
561         mutex_unlock(&cfg80211_mutex);
562 }
563 EXPORT_SYMBOL(wiphy_unregister);
564
565 void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
566 {
567         struct cfg80211_internal_bss *scan, *tmp;
568         rfkill_destroy(rdev->rfkill);
569         mutex_destroy(&rdev->mtx);
570         mutex_destroy(&rdev->devlist_mtx);
571         list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
572                 cfg80211_put_bss(&scan->pub);
573         kfree(rdev);
574 }
575
576 void wiphy_free(struct wiphy *wiphy)
577 {
578         put_device(&wiphy->dev);
579 }
580 EXPORT_SYMBOL(wiphy_free);
581
582 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
583 {
584         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
585
586         if (rfkill_set_hw_state(rdev->rfkill, blocked))
587                 schedule_work(&rdev->rfkill_sync);
588 }
589 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
590
591 static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
592                                          unsigned long state,
593                                          void *ndev)
594 {
595         struct net_device *dev = ndev;
596         struct wireless_dev *wdev = dev->ieee80211_ptr;
597         struct cfg80211_registered_device *rdev;
598
599         if (!wdev)
600                 return NOTIFY_DONE;
601
602         rdev = wiphy_to_dev(wdev->wiphy);
603
604         WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
605
606         switch (state) {
607         case NETDEV_REGISTER:
608                 mutex_init(&wdev->mtx);
609                 INIT_LIST_HEAD(&wdev->event_list);
610                 spin_lock_init(&wdev->event_lock);
611                 mutex_lock(&rdev->devlist_mtx);
612                 list_add(&wdev->list, &rdev->netdev_list);
613                 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
614                                       "phy80211")) {
615                         printk(KERN_ERR "wireless: failed to add phy80211 "
616                                 "symlink to netdev!\n");
617                 }
618                 wdev->netdev = dev;
619                 wdev->sme_state = CFG80211_SME_IDLE;
620                 mutex_unlock(&rdev->devlist_mtx);
621 #ifdef CONFIG_WIRELESS_EXT
622                 wdev->wext.default_key = -1;
623                 wdev->wext.default_mgmt_key = -1;
624                 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
625                 wdev->wext.ps = CONFIG_CFG80211_DEFAULT_PS_VALUE;
626                 wdev->wext.ps_timeout = 500;
627                 if (rdev->ops->set_power_mgmt)
628                         if (rdev->ops->set_power_mgmt(wdev->wiphy, dev,
629                                                       wdev->wext.ps,
630                                                       wdev->wext.ps_timeout)) {
631                                 /* assume this means it's off */
632                                 wdev->wext.ps = false;
633                         }
634 #endif
635                 break;
636         case NETDEV_GOING_DOWN:
637                 switch (wdev->iftype) {
638                 case NL80211_IFTYPE_ADHOC:
639                         cfg80211_leave_ibss(rdev, dev, true);
640                         break;
641                 case NL80211_IFTYPE_STATION:
642                         wdev_lock(wdev);
643 #ifdef CONFIG_WIRELESS_EXT
644                         kfree(wdev->wext.ie);
645                         wdev->wext.ie = NULL;
646                         wdev->wext.ie_len = 0;
647                         wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
648 #endif
649                         __cfg80211_disconnect(rdev, dev,
650                                               WLAN_REASON_DEAUTH_LEAVING, true);
651                         cfg80211_mlme_down(rdev, dev);
652                         wdev_unlock(wdev);
653                         break;
654                 default:
655                         break;
656                 }
657                 break;
658         case NETDEV_UP:
659 #ifdef CONFIG_WIRELESS_EXT
660                 cfg80211_lock_rdev(rdev);
661                 wdev_lock(wdev);
662                 switch (wdev->iftype) {
663                 case NL80211_IFTYPE_ADHOC:
664                         if (wdev->wext.ibss.ssid_len)
665                                 __cfg80211_join_ibss(rdev, dev,
666                                                      &wdev->wext.ibss);
667                         break;
668                 case NL80211_IFTYPE_STATION:
669                         if (wdev->wext.connect.ssid_len)
670                                 __cfg80211_connect(rdev, dev,
671                                                    &wdev->wext.connect);
672                         break;
673                 default:
674                         break;
675                 }
676                 wdev_unlock(wdev);
677                 cfg80211_unlock_rdev(rdev);
678 #endif
679                 break;
680         case NETDEV_UNREGISTER:
681                 mutex_lock(&rdev->devlist_mtx);
682                 if (!list_empty(&wdev->list)) {
683                         sysfs_remove_link(&dev->dev.kobj, "phy80211");
684                         list_del_init(&wdev->list);
685                 }
686                 mutex_unlock(&rdev->devlist_mtx);
687                 mutex_destroy(&wdev->mtx);
688                 break;
689         case NETDEV_PRE_UP:
690                 if (rfkill_blocked(rdev->rfkill))
691                         return notifier_from_errno(-ERFKILL);
692                 break;
693         }
694
695         return NOTIFY_DONE;
696 }
697
698 static struct notifier_block cfg80211_netdev_notifier = {
699         .notifier_call = cfg80211_netdev_notifier_call,
700 };
701
702 static int cfg80211_init(void)
703 {
704         int err;
705
706         err = wiphy_sysfs_init();
707         if (err)
708                 goto out_fail_sysfs;
709
710         err = register_netdevice_notifier(&cfg80211_netdev_notifier);
711         if (err)
712                 goto out_fail_notifier;
713
714         err = nl80211_init();
715         if (err)
716                 goto out_fail_nl80211;
717
718         ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
719
720         err = regulatory_init();
721         if (err)
722                 goto out_fail_reg;
723
724         return 0;
725
726 out_fail_reg:
727         debugfs_remove(ieee80211_debugfs_dir);
728 out_fail_nl80211:
729         unregister_netdevice_notifier(&cfg80211_netdev_notifier);
730 out_fail_notifier:
731         wiphy_sysfs_exit();
732 out_fail_sysfs:
733         return err;
734 }
735
736 subsys_initcall(cfg80211_init);
737
738 static void cfg80211_exit(void)
739 {
740         debugfs_remove(ieee80211_debugfs_dir);
741         nl80211_exit();
742         unregister_netdevice_notifier(&cfg80211_netdev_notifier);
743         wiphy_sysfs_exit();
744         regulatory_exit();
745 }
746 module_exit(cfg80211_exit);