2 * This is the linux wireless configuration interface.
4 * Copyright 2006-2009 Johannes Berg <johannes@sipsolutions.net>
8 #include <linux/module.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>
22 #include "wext-compat.h"
24 /* name for sysfs, %d is appended */
25 #define PHY_NAME "phy"
27 MODULE_AUTHOR("Johannes Berg");
28 MODULE_LICENSE("GPL");
29 MODULE_DESCRIPTION("wireless configuration support");
31 /* RCU might be appropriate here since we usually
32 * only read the list, and that can happen quite
33 * often because we need to do it for each command */
34 LIST_HEAD(cfg80211_rdev_list);
35 int cfg80211_rdev_list_generation;
38 * This is used to protect the cfg80211_rdev_list
40 DEFINE_MUTEX(cfg80211_mutex);
43 static struct dentry *ieee80211_debugfs_dir;
45 /* requires cfg80211_mutex to be held! */
46 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
48 struct cfg80211_registered_device *result = NULL, *rdev;
50 if (!wiphy_idx_valid(wiphy_idx))
53 assert_cfg80211_lock();
55 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
56 if (rdev->wiphy_idx == wiphy_idx) {
65 int get_wiphy_idx(struct wiphy *wiphy)
67 struct cfg80211_registered_device *rdev;
69 return WIPHY_IDX_STALE;
70 rdev = wiphy_to_dev(wiphy);
71 return rdev->wiphy_idx;
74 /* requires cfg80211_rdev_mutex to be held! */
75 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
77 struct cfg80211_registered_device *rdev;
79 if (!wiphy_idx_valid(wiphy_idx))
82 assert_cfg80211_lock();
84 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
90 /* requires cfg80211_mutex to be held! */
91 struct cfg80211_registered_device *
92 __cfg80211_rdev_from_info(struct genl_info *info)
95 struct cfg80211_registered_device *bywiphyidx = NULL, *byifidx = NULL;
96 struct net_device *dev;
99 assert_cfg80211_lock();
101 if (info->attrs[NL80211_ATTR_WIPHY]) {
102 bywiphyidx = cfg80211_rdev_by_wiphy_idx(
103 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY]));
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);
111 if (dev->ieee80211_ptr)
113 wiphy_to_dev(dev->ieee80211_ptr->wiphy);
119 if (bywiphyidx && byifidx) {
120 if (bywiphyidx != byifidx)
121 return ERR_PTR(-EINVAL);
123 return bywiphyidx; /* == byifidx */
134 struct cfg80211_registered_device *
135 cfg80211_get_dev_from_info(struct genl_info *info)
137 struct cfg80211_registered_device *rdev;
139 mutex_lock(&cfg80211_mutex);
140 rdev = __cfg80211_rdev_from_info(info);
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 */
146 mutex_lock(&rdev->mtx);
148 mutex_unlock(&cfg80211_mutex);
153 struct cfg80211_registered_device *
154 cfg80211_get_dev_from_ifindex(struct net *net, int ifindex)
156 struct cfg80211_registered_device *rdev = ERR_PTR(-ENODEV);
157 struct net_device *dev;
159 mutex_lock(&cfg80211_mutex);
160 dev = dev_get_by_index(net, ifindex);
163 if (dev->ieee80211_ptr) {
164 rdev = wiphy_to_dev(dev->ieee80211_ptr->wiphy);
165 mutex_lock(&rdev->mtx);
167 rdev = ERR_PTR(-ENODEV);
170 mutex_unlock(&cfg80211_mutex);
174 /* requires cfg80211_mutex to be held */
175 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
178 struct cfg80211_registered_device *rdev2;
179 int wiphy_idx, taken = -1, result, digits;
181 assert_cfg80211_lock();
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 */
188 while (wiphy_idx /= 10)
191 * deny the name if it is phy<idx> where <idx> is printed
192 * without leading zeroes. taken == strlen(newname) here
194 if (taken == strlen(PHY_NAME) + digits)
199 /* Ignore nop renames */
200 if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0)
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)
208 result = device_rename(&rdev->wiphy.dev, newname);
212 if (rdev->wiphy.debugfsdir &&
213 !debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
214 rdev->wiphy.debugfsdir,
215 rdev->wiphy.debugfsdir->d_parent,
217 printk(KERN_ERR "cfg80211: failed to rename debugfs dir to %s!\n",
220 nl80211_notify_dev_rename(rdev);
225 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
228 struct wireless_dev *wdev;
231 if (!rdev->wiphy.netnsok)
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");
239 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
243 /* failed -- clean up to old netns */
244 net = wiphy_net(&rdev->wiphy);
246 list_for_each_entry_continue_reverse(wdev, &rdev->netdev_list,
248 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
249 err = dev_change_net_namespace(wdev->netdev, net,
252 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
256 wiphy_net_set(&rdev->wiphy, net);
261 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
263 struct cfg80211_registered_device *rdev = data;
265 rdev->ops->rfkill_poll(&rdev->wiphy);
268 static int cfg80211_rfkill_set_block(void *data, bool blocked)
270 struct cfg80211_registered_device *rdev = data;
271 struct wireless_dev *wdev;
277 mutex_lock(&rdev->devlist_mtx);
279 list_for_each_entry(wdev, &rdev->netdev_list, list)
280 dev_close(wdev->netdev);
282 mutex_unlock(&rdev->devlist_mtx);
288 static void cfg80211_rfkill_sync_work(struct work_struct *work)
290 struct cfg80211_registered_device *rdev;
292 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync);
293 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
296 static void cfg80211_process_events(struct wireless_dev *wdev)
298 struct cfg80211_event *ev;
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);
306 spin_unlock_irqrestore(&wdev->event_lock, flags);
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,
316 ev->cr.status == WLAN_STATUS_SUCCESS,
320 __cfg80211_roamed(wdev, ev->rm.bssid,
321 ev->rm.req_ie, ev->rm.req_ie_len,
322 ev->rm.resp_ie, ev->rm.resp_ie_len);
324 case EVENT_DISCONNECTED:
325 __cfg80211_disconnected(wdev->netdev,
326 ev->dc.ie, ev->dc.ie_len,
327 ev->dc.reason, true);
329 case EVENT_IBSS_JOINED:
330 __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid);
337 spin_lock_irqsave(&wdev->event_lock, flags);
339 spin_unlock_irqrestore(&wdev->event_lock, flags);
342 static void cfg80211_event_work(struct work_struct *work)
344 struct cfg80211_registered_device *rdev;
345 struct wireless_dev *wdev;
347 rdev = container_of(work, struct cfg80211_registered_device,
351 cfg80211_lock_rdev(rdev);
352 mutex_lock(&rdev->devlist_mtx);
354 list_for_each_entry(wdev, &rdev->netdev_list, list)
355 cfg80211_process_events(wdev);
357 mutex_unlock(&rdev->devlist_mtx);
358 cfg80211_unlock_rdev(rdev);
362 /* exported functions */
364 struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
366 static int wiphy_counter;
368 struct cfg80211_registered_device *rdev;
371 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
372 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
373 WARN_ON(ops->connect && !ops->disconnect);
374 WARN_ON(ops->join_ibss && !ops->leave_ibss);
375 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
376 WARN_ON(ops->add_station && !ops->del_station);
377 WARN_ON(ops->add_mpath && !ops->del_mpath);
379 alloc_size = sizeof(*rdev) + sizeof_priv;
381 rdev = kzalloc(alloc_size, GFP_KERNEL);
387 mutex_lock(&cfg80211_mutex);
389 rdev->wiphy_idx = wiphy_counter++;
391 if (unlikely(!wiphy_idx_valid(rdev->wiphy_idx))) {
393 mutex_unlock(&cfg80211_mutex);
399 mutex_unlock(&cfg80211_mutex);
401 /* give it a proper name */
402 dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
404 mutex_init(&rdev->mtx);
405 mutex_init(&rdev->devlist_mtx);
406 INIT_LIST_HEAD(&rdev->netdev_list);
407 spin_lock_init(&rdev->bss_lock);
408 INIT_LIST_HEAD(&rdev->bss_list);
409 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
411 device_initialize(&rdev->wiphy.dev);
412 rdev->wiphy.dev.class = &ieee80211_class;
413 rdev->wiphy.dev.platform_data = rdev;
415 rdev->wiphy.ps_default = CONFIG_CFG80211_DEFAULT_PS_VALUE;
417 wiphy_net_set(&rdev->wiphy, &init_net);
419 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
420 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
421 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
422 &rdev->rfkill_ops, rdev);
429 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
430 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
431 INIT_WORK(&rdev->event_work, cfg80211_event_work);
433 init_waitqueue_head(&rdev->dev_wait);
436 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
437 * Fragmentation and RTS threshold are disabled by default with the
440 rdev->wiphy.retry_short = 7;
441 rdev->wiphy.retry_long = 4;
442 rdev->wiphy.frag_threshold = (u32) -1;
443 rdev->wiphy.rts_threshold = (u32) -1;
447 EXPORT_SYMBOL(wiphy_new);
449 int wiphy_register(struct wiphy *wiphy)
451 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
453 enum ieee80211_band band;
454 struct ieee80211_supported_band *sband;
455 bool have_band = false;
457 u16 ifmodes = wiphy->interface_modes;
459 /* sanity check ifmodes */
461 ifmodes &= ((1 << __NL80211_IFTYPE_AFTER_LAST) - 1) & ~1;
462 if (WARN_ON(ifmodes != wiphy->interface_modes))
463 wiphy->interface_modes = ifmodes;
465 /* sanity check supported bands/channels */
466 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
467 sband = wiphy->bands[band];
473 if (WARN_ON(!sband->n_channels || !sband->n_bitrates))
477 * Since we use a u32 for rate bitmaps in
478 * ieee80211_get_response_rate, we cannot
479 * have more than 32 legacy rates.
481 if (WARN_ON(sband->n_bitrates > 32))
484 for (i = 0; i < sband->n_channels; i++) {
485 sband->channels[i].orig_flags =
486 sband->channels[i].flags;
487 sband->channels[i].orig_mag =
488 sband->channels[i].max_antenna_gain;
489 sband->channels[i].orig_mpwr =
490 sband->channels[i].max_power;
491 sband->channels[i].band = band;
502 /* check and set up bitrates */
503 ieee80211_set_bitrate_flags(wiphy);
505 res = device_add(&rdev->wiphy.dev);
509 res = rfkill_register(rdev->rfkill);
513 mutex_lock(&cfg80211_mutex);
515 /* set up regulatory info */
516 wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE);
518 list_add(&rdev->list, &cfg80211_rdev_list);
519 cfg80211_rdev_list_generation++;
521 mutex_unlock(&cfg80211_mutex);
524 rdev->wiphy.debugfsdir =
525 debugfs_create_dir(wiphy_name(&rdev->wiphy),
526 ieee80211_debugfs_dir);
527 if (IS_ERR(rdev->wiphy.debugfsdir))
528 rdev->wiphy.debugfsdir = NULL;
530 if (wiphy->custom_regulatory) {
531 struct regulatory_request request;
533 request.wiphy_idx = get_wiphy_idx(wiphy);
534 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
535 request.alpha2[0] = '9';
536 request.alpha2[1] = '9';
538 nl80211_send_reg_change_event(&request);
541 cfg80211_debugfs_rdev_add(rdev);
546 device_del(&rdev->wiphy.dev);
549 EXPORT_SYMBOL(wiphy_register);
551 void wiphy_rfkill_start_polling(struct wiphy *wiphy)
553 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
555 if (!rdev->ops->rfkill_poll)
557 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
558 rfkill_resume_polling(rdev->rfkill);
560 EXPORT_SYMBOL(wiphy_rfkill_start_polling);
562 void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
564 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
566 rfkill_pause_polling(rdev->rfkill);
568 EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
570 void wiphy_unregister(struct wiphy *wiphy)
572 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
574 rfkill_unregister(rdev->rfkill);
576 /* protect the device list */
577 mutex_lock(&cfg80211_mutex);
579 wait_event(rdev->dev_wait, ({
581 mutex_lock(&rdev->devlist_mtx);
582 __count = rdev->opencount;
583 mutex_unlock(&rdev->devlist_mtx);
586 mutex_lock(&rdev->devlist_mtx);
587 BUG_ON(!list_empty(&rdev->netdev_list));
588 mutex_unlock(&rdev->devlist_mtx);
591 * First remove the hardware from everywhere, this makes
592 * it impossible to find from userspace.
594 cfg80211_debugfs_rdev_del(rdev);
595 list_del(&rdev->list);
598 * Try to grab rdev->mtx. If a command is still in progress,
599 * hopefully the driver will refuse it since it's tearing
600 * down the device already. We wait for this command to complete
601 * before unlinking the item from the list.
602 * Note: as codified by the BUG_ON above we cannot get here if
603 * a virtual interface is still present. Hence, we can only get
604 * to lock contention here if userspace issues a command that
605 * identified the hardware by wiphy index.
607 cfg80211_lock_rdev(rdev);
609 cfg80211_unlock_rdev(rdev);
611 /* If this device got a regulatory hint tell core its
612 * free to listen now to a new shiny device regulatory hint */
613 reg_device_remove(wiphy);
615 cfg80211_rdev_list_generation++;
616 device_del(&rdev->wiphy.dev);
617 debugfs_remove(rdev->wiphy.debugfsdir);
619 mutex_unlock(&cfg80211_mutex);
621 flush_work(&rdev->scan_done_wk);
622 cancel_work_sync(&rdev->conn_work);
623 flush_work(&rdev->event_work);
625 EXPORT_SYMBOL(wiphy_unregister);
627 void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
629 struct cfg80211_internal_bss *scan, *tmp;
630 rfkill_destroy(rdev->rfkill);
631 mutex_destroy(&rdev->mtx);
632 mutex_destroy(&rdev->devlist_mtx);
633 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
634 cfg80211_put_bss(&scan->pub);
638 void wiphy_free(struct wiphy *wiphy)
640 put_device(&wiphy->dev);
642 EXPORT_SYMBOL(wiphy_free);
644 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
646 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
648 if (rfkill_set_hw_state(rdev->rfkill, blocked))
649 schedule_work(&rdev->rfkill_sync);
651 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
653 static void wdev_cleanup_work(struct work_struct *work)
655 struct wireless_dev *wdev;
656 struct cfg80211_registered_device *rdev;
658 wdev = container_of(work, struct wireless_dev, cleanup_work);
659 rdev = wiphy_to_dev(wdev->wiphy);
661 cfg80211_lock_rdev(rdev);
663 if (WARN_ON(rdev->scan_req && rdev->scan_req->dev == wdev->netdev)) {
664 rdev->scan_req->aborted = true;
665 ___cfg80211_scan_done(rdev);
668 cfg80211_unlock_rdev(rdev);
670 mutex_lock(&rdev->devlist_mtx);
672 mutex_unlock(&rdev->devlist_mtx);
673 wake_up(&rdev->dev_wait);
675 dev_put(wdev->netdev);
678 static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
682 struct net_device *dev = ndev;
683 struct wireless_dev *wdev = dev->ieee80211_ptr;
684 struct cfg80211_registered_device *rdev;
689 rdev = wiphy_to_dev(wdev->wiphy);
691 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
694 case NETDEV_REGISTER:
696 * NB: cannot take rdev->mtx here because this may be
697 * called within code protected by it when interfaces
698 * are added with nl80211.
700 mutex_init(&wdev->mtx);
701 INIT_WORK(&wdev->cleanup_work, wdev_cleanup_work);
702 INIT_LIST_HEAD(&wdev->event_list);
703 spin_lock_init(&wdev->event_lock);
704 mutex_lock(&rdev->devlist_mtx);
705 list_add(&wdev->list, &rdev->netdev_list);
706 rdev->devlist_generation++;
707 /* can only change netns with wiphy */
708 dev->features |= NETIF_F_NETNS_LOCAL;
710 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
712 printk(KERN_ERR "wireless: failed to add phy80211 "
713 "symlink to netdev!\n");
716 wdev->sme_state = CFG80211_SME_IDLE;
717 mutex_unlock(&rdev->devlist_mtx);
718 #ifdef CONFIG_WIRELESS_EXT
719 if (!dev->wireless_handlers)
720 dev->wireless_handlers = &cfg80211_wext_handler;
721 wdev->wext.default_key = -1;
722 wdev->wext.default_mgmt_key = -1;
723 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
724 wdev->wext.ps = wdev->wiphy->ps_default;
725 wdev->wext.ps_timeout = 100;
726 if (rdev->ops->set_power_mgmt)
727 if (rdev->ops->set_power_mgmt(wdev->wiphy, dev,
729 wdev->wext.ps_timeout)) {
730 /* assume this means it's off */
731 wdev->wext.ps = false;
735 case NETDEV_GOING_DOWN:
736 switch (wdev->iftype) {
737 case NL80211_IFTYPE_ADHOC:
738 cfg80211_leave_ibss(rdev, dev, true);
740 case NL80211_IFTYPE_STATION:
742 #ifdef CONFIG_WIRELESS_EXT
743 kfree(wdev->wext.ie);
744 wdev->wext.ie = NULL;
745 wdev->wext.ie_len = 0;
746 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
748 __cfg80211_disconnect(rdev, dev,
749 WLAN_REASON_DEAUTH_LEAVING, true);
750 cfg80211_mlme_down(rdev, dev);
757 schedule_work(&wdev->cleanup_work);
761 * If we have a really quick DOWN/UP succession we may
762 * have this work still pending ... cancel it and see
763 * if it was pending, in which case we need to account
764 * for some of the work it would have done.
766 if (cancel_work_sync(&wdev->cleanup_work)) {
767 mutex_lock(&rdev->devlist_mtx);
769 mutex_unlock(&rdev->devlist_mtx);
772 #ifdef CONFIG_WIRELESS_EXT
773 cfg80211_lock_rdev(rdev);
774 mutex_lock(&rdev->devlist_mtx);
776 switch (wdev->iftype) {
777 case NL80211_IFTYPE_ADHOC:
778 cfg80211_ibss_wext_join(rdev, wdev);
780 case NL80211_IFTYPE_STATION:
781 cfg80211_mgd_wext_connect(rdev, wdev);
788 mutex_unlock(&rdev->devlist_mtx);
789 cfg80211_unlock_rdev(rdev);
792 case NETDEV_UNREGISTER:
794 * NB: cannot take rdev->mtx here because this may be
795 * called within code protected by it when interfaces
796 * are removed with nl80211.
798 mutex_lock(&rdev->devlist_mtx);
800 * It is possible to get NETDEV_UNREGISTER
801 * multiple times. To detect that, check
802 * that the interface is still on the list
803 * of registered interfaces, and only then
804 * remove and clean it up.
806 if (!list_empty(&wdev->list)) {
807 sysfs_remove_link(&dev->dev.kobj, "phy80211");
808 list_del_init(&wdev->list);
809 rdev->devlist_generation++;
810 #ifdef CONFIG_WIRELESS_EXT
811 kfree(wdev->wext.keys);
814 mutex_unlock(&rdev->devlist_mtx);
817 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
818 return notifier_from_errno(-EOPNOTSUPP);
819 if (rfkill_blocked(rdev->rfkill))
820 return notifier_from_errno(-ERFKILL);
827 static struct notifier_block cfg80211_netdev_notifier = {
828 .notifier_call = cfg80211_netdev_notifier_call,
831 static void __net_exit cfg80211_pernet_exit(struct net *net)
833 struct cfg80211_registered_device *rdev;
836 mutex_lock(&cfg80211_mutex);
837 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
838 if (net_eq(wiphy_net(&rdev->wiphy), net))
839 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
841 mutex_unlock(&cfg80211_mutex);
845 static struct pernet_operations cfg80211_pernet_ops = {
846 .exit = cfg80211_pernet_exit,
849 static int __init cfg80211_init(void)
853 err = register_pernet_device(&cfg80211_pernet_ops);
855 goto out_fail_pernet;
857 err = wiphy_sysfs_init();
861 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
863 goto out_fail_notifier;
865 err = nl80211_init();
867 goto out_fail_nl80211;
869 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
871 err = regulatory_init();
878 debugfs_remove(ieee80211_debugfs_dir);
880 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
884 unregister_pernet_device(&cfg80211_pernet_ops);
888 subsys_initcall(cfg80211_init);
890 static void cfg80211_exit(void)
892 debugfs_remove(ieee80211_debugfs_dir);
894 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
897 unregister_pernet_device(&cfg80211_pernet_ops);
899 module_exit(cfg80211_exit);