cfg80211: make aware of net namespaces
[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(genl_info_net(info), 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(struct net *net, 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(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 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
226                           struct net *net)
227 {
228         struct wireless_dev *wdev;
229         int err = 0;
230
231         if (!rdev->wiphy.netnsok)
232                 return -EOPNOTSUPP;
233
234         list_for_each_entry(wdev, &rdev->netdev_list, list) {
235                 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
236                 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
237                 if (err)
238                         break;
239                 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
240         }
241
242         if (err) {
243                 /* failed -- clean up to old netns */
244                 net = wiphy_net(&rdev->wiphy);
245
246                 list_for_each_entry_continue_reverse(wdev, &rdev->netdev_list,
247                                                      list) {
248                         wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
249                         err = dev_change_net_namespace(wdev->netdev, net,
250                                                         "wlan%d");
251                         WARN_ON(err);
252                         wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
253                 }
254         }
255
256         wiphy_net_set(&rdev->wiphy, net);
257
258         return err;
259 }
260
261 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
262 {
263         struct cfg80211_registered_device *rdev = data;
264
265         rdev->ops->rfkill_poll(&rdev->wiphy);
266 }
267
268 static int cfg80211_rfkill_set_block(void *data, bool blocked)
269 {
270         struct cfg80211_registered_device *rdev = data;
271         struct wireless_dev *wdev;
272
273         if (!blocked)
274                 return 0;
275
276         rtnl_lock();
277         mutex_lock(&rdev->devlist_mtx);
278
279         list_for_each_entry(wdev, &rdev->netdev_list, list)
280                 dev_close(wdev->netdev);
281
282         mutex_unlock(&rdev->devlist_mtx);
283         rtnl_unlock();
284
285         return 0;
286 }
287
288 static void cfg80211_rfkill_sync_work(struct work_struct *work)
289 {
290         struct cfg80211_registered_device *rdev;
291
292         rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync);
293         cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
294 }
295
296 static void cfg80211_process_events(struct wireless_dev *wdev)
297 {
298         struct cfg80211_event *ev;
299         unsigned long flags;
300
301         spin_lock_irqsave(&wdev->event_lock, flags);
302         while (!list_empty(&wdev->event_list)) {
303                 ev = list_first_entry(&wdev->event_list,
304                                       struct cfg80211_event, list);
305                 list_del(&ev->list);
306                 spin_unlock_irqrestore(&wdev->event_lock, flags);
307
308                 wdev_lock(wdev);
309                 switch (ev->type) {
310                 case EVENT_CONNECT_RESULT:
311                         __cfg80211_connect_result(
312                                 wdev->netdev, ev->cr.bssid,
313                                 ev->cr.req_ie, ev->cr.req_ie_len,
314                                 ev->cr.resp_ie, ev->cr.resp_ie_len,
315                                 ev->cr.status,
316                                 ev->cr.status == WLAN_STATUS_SUCCESS);
317                         break;
318                 case EVENT_ROAMED:
319                         __cfg80211_roamed(wdev, ev->rm.bssid,
320                                           ev->rm.req_ie, ev->rm.req_ie_len,
321                                           ev->rm.resp_ie, ev->rm.resp_ie_len);
322                         break;
323                 case EVENT_DISCONNECTED:
324                         __cfg80211_disconnected(wdev->netdev,
325                                                 ev->dc.ie, ev->dc.ie_len,
326                                                 ev->dc.reason, true);
327                         break;
328                 case EVENT_IBSS_JOINED:
329                         __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid);
330                         break;
331                 }
332                 wdev_unlock(wdev);
333
334                 kfree(ev);
335
336                 spin_lock_irqsave(&wdev->event_lock, flags);
337         }
338         spin_unlock_irqrestore(&wdev->event_lock, flags);
339 }
340
341 static void cfg80211_event_work(struct work_struct *work)
342 {
343         struct cfg80211_registered_device *rdev;
344         struct wireless_dev *wdev;
345
346         rdev = container_of(work, struct cfg80211_registered_device,
347                             event_work);
348
349         rtnl_lock();
350         cfg80211_lock_rdev(rdev);
351         mutex_lock(&rdev->devlist_mtx);
352
353         list_for_each_entry(wdev, &rdev->netdev_list, list)
354                 cfg80211_process_events(wdev);
355
356         mutex_unlock(&rdev->devlist_mtx);
357         cfg80211_unlock_rdev(rdev);
358         rtnl_unlock();
359 }
360
361 /* exported functions */
362
363 struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
364 {
365         static int wiphy_counter;
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
378         alloc_size = sizeof(*rdev) + sizeof_priv;
379
380         rdev = kzalloc(alloc_size, GFP_KERNEL);
381         if (!rdev)
382                 return NULL;
383
384         rdev->ops = ops;
385
386         mutex_lock(&cfg80211_mutex);
387
388         rdev->wiphy_idx = wiphy_counter++;
389
390         if (unlikely(!wiphy_idx_valid(rdev->wiphy_idx))) {
391                 wiphy_counter--;
392                 mutex_unlock(&cfg80211_mutex);
393                 /* ugh, wrapped! */
394                 kfree(rdev);
395                 return NULL;
396         }
397
398         mutex_unlock(&cfg80211_mutex);
399
400         /* give it a proper name */
401         dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
402
403         mutex_init(&rdev->mtx);
404         mutex_init(&rdev->devlist_mtx);
405         INIT_LIST_HEAD(&rdev->netdev_list);
406         spin_lock_init(&rdev->bss_lock);
407         INIT_LIST_HEAD(&rdev->bss_list);
408         INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
409
410         device_initialize(&rdev->wiphy.dev);
411         rdev->wiphy.dev.class = &ieee80211_class;
412         rdev->wiphy.dev.platform_data = rdev;
413
414         wiphy_net_set(&rdev->wiphy, &init_net);
415
416         rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
417         rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
418                                    &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
419                                    &rdev->rfkill_ops, rdev);
420
421         if (!rdev->rfkill) {
422                 kfree(rdev);
423                 return NULL;
424         }
425
426         INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
427         INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
428         INIT_WORK(&rdev->event_work, cfg80211_event_work);
429
430         /*
431          * Initialize wiphy parameters to IEEE 802.11 MIB default values.
432          * Fragmentation and RTS threshold are disabled by default with the
433          * special -1 value.
434          */
435         rdev->wiphy.retry_short = 7;
436         rdev->wiphy.retry_long = 4;
437         rdev->wiphy.frag_threshold = (u32) -1;
438         rdev->wiphy.rts_threshold = (u32) -1;
439
440         return &rdev->wiphy;
441 }
442 EXPORT_SYMBOL(wiphy_new);
443
444 int 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         /* sanity check ifmodes */
455         WARN_ON(!ifmodes);
456         ifmodes &= ((1 << __NL80211_IFTYPE_AFTER_LAST) - 1) & ~1;
457         if (WARN_ON(ifmodes != wiphy->interface_modes))
458                 wiphy->interface_modes = ifmodes;
459
460         /* sanity check supported bands/channels */
461         for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
462                 sband = wiphy->bands[band];
463                 if (!sband)
464                         continue;
465
466                 sband->band = band;
467
468                 if (WARN_ON(!sband->n_channels || !sband->n_bitrates))
469                         return -EINVAL;
470
471                 /*
472                  * Since we use a u32 for rate bitmaps in
473                  * ieee80211_get_response_rate, we cannot
474                  * have more than 32 legacy rates.
475                  */
476                 if (WARN_ON(sband->n_bitrates > 32))
477                         return -EINVAL;
478
479                 for (i = 0; i < sband->n_channels; i++) {
480                         sband->channels[i].orig_flags =
481                                 sband->channels[i].flags;
482                         sband->channels[i].orig_mag =
483                                 sband->channels[i].max_antenna_gain;
484                         sband->channels[i].orig_mpwr =
485                                 sband->channels[i].max_power;
486                         sband->channels[i].band = band;
487                 }
488
489                 have_band = true;
490         }
491
492         if (!have_band) {
493                 WARN_ON(1);
494                 return -EINVAL;
495         }
496
497         /* check and set up bitrates */
498         ieee80211_set_bitrate_flags(wiphy);
499
500         res = device_add(&rdev->wiphy.dev);
501         if (res)
502                 return res;
503
504         res = rfkill_register(rdev->rfkill);
505         if (res)
506                 goto out_rm_dev;
507
508         mutex_lock(&cfg80211_mutex);
509
510         /* set up regulatory info */
511         wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE);
512
513         list_add(&rdev->list, &cfg80211_rdev_list);
514
515         mutex_unlock(&cfg80211_mutex);
516
517         /* add to debugfs */
518         rdev->wiphy.debugfsdir =
519                 debugfs_create_dir(wiphy_name(&rdev->wiphy),
520                                    ieee80211_debugfs_dir);
521         if (IS_ERR(rdev->wiphy.debugfsdir))
522                 rdev->wiphy.debugfsdir = NULL;
523
524         if (wiphy->custom_regulatory) {
525                 struct regulatory_request request;
526
527                 request.wiphy_idx = get_wiphy_idx(wiphy);
528                 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
529                 request.alpha2[0] = '9';
530                 request.alpha2[1] = '9';
531
532                 nl80211_send_reg_change_event(&request);
533         }
534
535         cfg80211_debugfs_rdev_add(rdev);
536
537         return 0;
538
539  out_rm_dev:
540         device_del(&rdev->wiphy.dev);
541         return res;
542 }
543 EXPORT_SYMBOL(wiphy_register);
544
545 void wiphy_rfkill_start_polling(struct wiphy *wiphy)
546 {
547         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
548
549         if (!rdev->ops->rfkill_poll)
550                 return;
551         rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
552         rfkill_resume_polling(rdev->rfkill);
553 }
554 EXPORT_SYMBOL(wiphy_rfkill_start_polling);
555
556 void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
557 {
558         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
559
560         rfkill_pause_polling(rdev->rfkill);
561 }
562 EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
563
564 void wiphy_unregister(struct wiphy *wiphy)
565 {
566         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
567
568         rfkill_unregister(rdev->rfkill);
569
570         /* protect the device list */
571         mutex_lock(&cfg80211_mutex);
572
573         BUG_ON(!list_empty(&rdev->netdev_list));
574
575         /*
576          * Try to grab rdev->mtx. If a command is still in progress,
577          * hopefully the driver will refuse it since it's tearing
578          * down the device already. We wait for this command to complete
579          * before unlinking the item from the list.
580          * Note: as codified by the BUG_ON above we cannot get here if
581          * a virtual interface is still associated. Hence, we can only
582          * get to lock contention here if userspace issues a command
583          * that identified the hardware by wiphy index.
584          */
585         mutex_lock(&rdev->mtx);
586         /* unlock again before freeing */
587         mutex_unlock(&rdev->mtx);
588
589         cfg80211_debugfs_rdev_del(rdev);
590
591         /* If this device got a regulatory hint tell core its
592          * free to listen now to a new shiny device regulatory hint */
593         reg_device_remove(wiphy);
594
595         list_del(&rdev->list);
596         device_del(&rdev->wiphy.dev);
597         debugfs_remove(rdev->wiphy.debugfsdir);
598
599         mutex_unlock(&cfg80211_mutex);
600
601         cancel_work_sync(&rdev->conn_work);
602         cancel_work_sync(&rdev->scan_done_wk);
603         kfree(rdev->scan_req);
604         flush_work(&rdev->event_work);
605 }
606 EXPORT_SYMBOL(wiphy_unregister);
607
608 void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
609 {
610         struct cfg80211_internal_bss *scan, *tmp;
611         rfkill_destroy(rdev->rfkill);
612         mutex_destroy(&rdev->mtx);
613         mutex_destroy(&rdev->devlist_mtx);
614         list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
615                 cfg80211_put_bss(&scan->pub);
616         kfree(rdev);
617 }
618
619 void wiphy_free(struct wiphy *wiphy)
620 {
621         put_device(&wiphy->dev);
622 }
623 EXPORT_SYMBOL(wiphy_free);
624
625 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
626 {
627         struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
628
629         if (rfkill_set_hw_state(rdev->rfkill, blocked))
630                 schedule_work(&rdev->rfkill_sync);
631 }
632 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
633
634 static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
635                                          unsigned long state,
636                                          void *ndev)
637 {
638         struct net_device *dev = ndev;
639         struct wireless_dev *wdev = dev->ieee80211_ptr;
640         struct cfg80211_registered_device *rdev;
641
642         if (!wdev)
643                 return NOTIFY_DONE;
644
645         rdev = wiphy_to_dev(wdev->wiphy);
646
647         WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
648
649         switch (state) {
650         case NETDEV_REGISTER:
651                 mutex_init(&wdev->mtx);
652                 INIT_LIST_HEAD(&wdev->event_list);
653                 spin_lock_init(&wdev->event_lock);
654                 mutex_lock(&rdev->devlist_mtx);
655                 list_add(&wdev->list, &rdev->netdev_list);
656                 /* can only change netns with wiphy */
657                 dev->features |= NETIF_F_NETNS_LOCAL;
658
659                 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
660                                       "phy80211")) {
661                         printk(KERN_ERR "wireless: failed to add phy80211 "
662                                 "symlink to netdev!\n");
663                 }
664                 wdev->netdev = dev;
665                 wdev->sme_state = CFG80211_SME_IDLE;
666                 mutex_unlock(&rdev->devlist_mtx);
667 #ifdef CONFIG_WIRELESS_EXT
668                 wdev->wext.default_key = -1;
669                 wdev->wext.default_mgmt_key = -1;
670                 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
671                 wdev->wext.ps = CONFIG_CFG80211_DEFAULT_PS_VALUE;
672                 wdev->wext.ps_timeout = 500;
673                 if (rdev->ops->set_power_mgmt)
674                         if (rdev->ops->set_power_mgmt(wdev->wiphy, dev,
675                                                       wdev->wext.ps,
676                                                       wdev->wext.ps_timeout)) {
677                                 /* assume this means it's off */
678                                 wdev->wext.ps = false;
679                         }
680 #endif
681                 break;
682         case NETDEV_GOING_DOWN:
683                 switch (wdev->iftype) {
684                 case NL80211_IFTYPE_ADHOC:
685                         cfg80211_leave_ibss(rdev, dev, true);
686                         break;
687                 case NL80211_IFTYPE_STATION:
688                         wdev_lock(wdev);
689 #ifdef CONFIG_WIRELESS_EXT
690                         kfree(wdev->wext.ie);
691                         wdev->wext.ie = NULL;
692                         wdev->wext.ie_len = 0;
693                         wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
694 #endif
695                         __cfg80211_disconnect(rdev, dev,
696                                               WLAN_REASON_DEAUTH_LEAVING, true);
697                         cfg80211_mlme_down(rdev, dev);
698                         wdev_unlock(wdev);
699                         break;
700                 default:
701                         break;
702                 }
703                 break;
704         case NETDEV_UP:
705 #ifdef CONFIG_WIRELESS_EXT
706                 cfg80211_lock_rdev(rdev);
707                 wdev_lock(wdev);
708                 switch (wdev->iftype) {
709                 case NL80211_IFTYPE_ADHOC:
710                         cfg80211_ibss_wext_join(rdev, wdev);
711                         break;
712                 case NL80211_IFTYPE_STATION:
713                         cfg80211_mgd_wext_connect(rdev, wdev);
714                         break;
715                 default:
716                         break;
717                 }
718                 wdev_unlock(wdev);
719                 cfg80211_unlock_rdev(rdev);
720 #endif
721                 break;
722         case NETDEV_UNREGISTER:
723                 mutex_lock(&rdev->devlist_mtx);
724                 if (!list_empty(&wdev->list)) {
725                         sysfs_remove_link(&dev->dev.kobj, "phy80211");
726                         list_del_init(&wdev->list);
727                 }
728                 mutex_unlock(&rdev->devlist_mtx);
729                 mutex_destroy(&wdev->mtx);
730 #ifdef CONFIG_WIRELESS_EXT
731                 kfree(wdev->wext.keys);
732 #endif
733                 break;
734         case NETDEV_PRE_UP:
735                 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
736                         return notifier_from_errno(-EOPNOTSUPP);
737                 if (rfkill_blocked(rdev->rfkill))
738                         return notifier_from_errno(-ERFKILL);
739                 break;
740         }
741
742         return NOTIFY_DONE;
743 }
744
745 static struct notifier_block cfg80211_netdev_notifier = {
746         .notifier_call = cfg80211_netdev_notifier_call,
747 };
748
749 static void __net_exit cfg80211_pernet_exit(struct net *net)
750 {
751         struct cfg80211_registered_device *rdev;
752
753         rtnl_lock();
754         mutex_lock(&cfg80211_mutex);
755         list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
756                 if (net_eq(wiphy_net(&rdev->wiphy), net))
757                         WARN_ON(cfg80211_switch_netns(rdev, &init_net));
758         }
759         mutex_unlock(&cfg80211_mutex);
760         rtnl_unlock();
761 }
762
763 static struct pernet_operations cfg80211_pernet_ops = {
764         .exit = cfg80211_pernet_exit,
765 };
766
767 static int __init cfg80211_init(void)
768 {
769         int err;
770
771         err = register_pernet_device(&cfg80211_pernet_ops);
772         if (err)
773                 goto out_fail_pernet;
774
775         err = wiphy_sysfs_init();
776         if (err)
777                 goto out_fail_sysfs;
778
779         err = register_netdevice_notifier(&cfg80211_netdev_notifier);
780         if (err)
781                 goto out_fail_notifier;
782
783         err = nl80211_init();
784         if (err)
785                 goto out_fail_nl80211;
786
787         ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
788
789         err = regulatory_init();
790         if (err)
791                 goto out_fail_reg;
792
793         return 0;
794
795 out_fail_reg:
796         debugfs_remove(ieee80211_debugfs_dir);
797 out_fail_nl80211:
798         unregister_netdevice_notifier(&cfg80211_netdev_notifier);
799 out_fail_notifier:
800         wiphy_sysfs_exit();
801 out_fail_sysfs:
802         unregister_pernet_device(&cfg80211_pernet_ops);
803 out_fail_pernet:
804         return err;
805 }
806 subsys_initcall(cfg80211_init);
807
808 static void cfg80211_exit(void)
809 {
810         debugfs_remove(ieee80211_debugfs_dir);
811         nl80211_exit();
812         unregister_netdevice_notifier(&cfg80211_netdev_notifier);
813         wiphy_sysfs_exit();
814         regulatory_exit();
815         unregister_pernet_device(&cfg80211_pernet_ops);
816 }
817 module_exit(cfg80211_exit);