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/etherdevice.h>
16 #include <linux/rtnetlink.h>
17 #include <linux/sched.h>
18 #include <net/genetlink.h>
19 #include <net/cfg80211.h>
24 #include "wext-compat.h"
27 /* name for sysfs, %d is appended */
28 #define PHY_NAME "phy"
30 MODULE_AUTHOR("Johannes Berg");
31 MODULE_LICENSE("GPL");
32 MODULE_DESCRIPTION("wireless configuration support");
34 /* RCU might be appropriate here since we usually
35 * only read the list, and that can happen quite
36 * often because we need to do it for each command */
37 LIST_HEAD(cfg80211_rdev_list);
38 int cfg80211_rdev_list_generation;
41 * This is used to protect the cfg80211_rdev_list
43 DEFINE_MUTEX(cfg80211_mutex);
46 static struct dentry *ieee80211_debugfs_dir;
48 /* for the cleanup, scan and event works */
49 struct workqueue_struct *cfg80211_wq;
51 /* requires cfg80211_mutex to be held! */
52 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
54 struct cfg80211_registered_device *result = NULL, *rdev;
56 if (!wiphy_idx_valid(wiphy_idx))
59 assert_cfg80211_lock();
61 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
62 if (rdev->wiphy_idx == wiphy_idx) {
71 int get_wiphy_idx(struct wiphy *wiphy)
73 struct cfg80211_registered_device *rdev;
75 return WIPHY_IDX_STALE;
76 rdev = wiphy_to_dev(wiphy);
77 return rdev->wiphy_idx;
80 /* requires cfg80211_rdev_mutex to be held! */
81 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
83 struct cfg80211_registered_device *rdev;
85 if (!wiphy_idx_valid(wiphy_idx))
88 assert_cfg80211_lock();
90 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
96 /* requires cfg80211_mutex to be held! */
97 struct cfg80211_registered_device *
98 __cfg80211_rdev_from_info(struct genl_info *info)
101 struct cfg80211_registered_device *bywiphyidx = NULL, *byifidx = NULL;
102 struct net_device *dev;
105 assert_cfg80211_lock();
107 if (info->attrs[NL80211_ATTR_WIPHY]) {
108 bywiphyidx = cfg80211_rdev_by_wiphy_idx(
109 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY]));
113 if (info->attrs[NL80211_ATTR_IFINDEX]) {
114 ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
115 dev = dev_get_by_index(genl_info_net(info), ifindex);
117 if (dev->ieee80211_ptr)
119 wiphy_to_dev(dev->ieee80211_ptr->wiphy);
125 if (bywiphyidx && byifidx) {
126 if (bywiphyidx != byifidx)
127 return ERR_PTR(-EINVAL);
129 return bywiphyidx; /* == byifidx */
140 struct cfg80211_registered_device *
141 cfg80211_get_dev_from_info(struct genl_info *info)
143 struct cfg80211_registered_device *rdev;
145 mutex_lock(&cfg80211_mutex);
146 rdev = __cfg80211_rdev_from_info(info);
148 /* if it is not an error we grab the lock on
149 * it to assure it won't be going away while
150 * we operate on it */
152 mutex_lock(&rdev->mtx);
154 mutex_unlock(&cfg80211_mutex);
159 struct cfg80211_registered_device *
160 cfg80211_get_dev_from_ifindex(struct net *net, int ifindex)
162 struct cfg80211_registered_device *rdev = ERR_PTR(-ENODEV);
163 struct net_device *dev;
165 mutex_lock(&cfg80211_mutex);
166 dev = dev_get_by_index(net, ifindex);
169 if (dev->ieee80211_ptr) {
170 rdev = wiphy_to_dev(dev->ieee80211_ptr->wiphy);
171 mutex_lock(&rdev->mtx);
173 rdev = ERR_PTR(-ENODEV);
176 mutex_unlock(&cfg80211_mutex);
180 /* requires cfg80211_mutex to be held */
181 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
184 struct cfg80211_registered_device *rdev2;
185 int wiphy_idx, taken = -1, result, digits;
187 assert_cfg80211_lock();
189 /* prohibit calling the thing phy%d when %d is not its number */
190 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
191 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
192 /* count number of places needed to print wiphy_idx */
194 while (wiphy_idx /= 10)
197 * deny the name if it is phy<idx> where <idx> is printed
198 * without leading zeroes. taken == strlen(newname) here
200 if (taken == strlen(PHY_NAME) + digits)
205 /* Ignore nop renames */
206 if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0)
209 /* Ensure another device does not already have this name. */
210 list_for_each_entry(rdev2, &cfg80211_rdev_list, list)
211 if (strcmp(newname, dev_name(&rdev2->wiphy.dev)) == 0)
214 result = device_rename(&rdev->wiphy.dev, newname);
218 if (rdev->wiphy.debugfsdir &&
219 !debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
220 rdev->wiphy.debugfsdir,
221 rdev->wiphy.debugfsdir->d_parent,
223 printk(KERN_ERR "cfg80211: failed to rename debugfs dir to %s!\n",
226 nl80211_notify_dev_rename(rdev);
231 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
234 struct wireless_dev *wdev;
237 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK))
240 list_for_each_entry(wdev, &rdev->netdev_list, list) {
241 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
242 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
245 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
249 /* failed -- clean up to old netns */
250 net = wiphy_net(&rdev->wiphy);
252 list_for_each_entry_continue_reverse(wdev, &rdev->netdev_list,
254 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
255 err = dev_change_net_namespace(wdev->netdev, net,
258 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
262 wiphy_net_set(&rdev->wiphy, net);
267 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
269 struct cfg80211_registered_device *rdev = data;
271 rdev->ops->rfkill_poll(&rdev->wiphy);
274 static int cfg80211_rfkill_set_block(void *data, bool blocked)
276 struct cfg80211_registered_device *rdev = data;
277 struct wireless_dev *wdev;
283 mutex_lock(&rdev->devlist_mtx);
285 list_for_each_entry(wdev, &rdev->netdev_list, list)
286 dev_close(wdev->netdev);
288 mutex_unlock(&rdev->devlist_mtx);
294 static void cfg80211_rfkill_sync_work(struct work_struct *work)
296 struct cfg80211_registered_device *rdev;
298 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync);
299 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
302 static void cfg80211_event_work(struct work_struct *work)
304 struct cfg80211_registered_device *rdev;
306 rdev = container_of(work, struct cfg80211_registered_device,
310 cfg80211_lock_rdev(rdev);
312 cfg80211_process_rdev_events(rdev);
313 cfg80211_unlock_rdev(rdev);
317 /* exported functions */
319 struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
321 static int wiphy_counter;
323 struct cfg80211_registered_device *rdev;
326 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
327 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
328 WARN_ON(ops->connect && !ops->disconnect);
329 WARN_ON(ops->join_ibss && !ops->leave_ibss);
330 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
331 WARN_ON(ops->add_station && !ops->del_station);
332 WARN_ON(ops->add_mpath && !ops->del_mpath);
334 alloc_size = sizeof(*rdev) + sizeof_priv;
336 rdev = kzalloc(alloc_size, GFP_KERNEL);
342 mutex_lock(&cfg80211_mutex);
344 rdev->wiphy_idx = wiphy_counter++;
346 if (unlikely(!wiphy_idx_valid(rdev->wiphy_idx))) {
348 mutex_unlock(&cfg80211_mutex);
354 mutex_unlock(&cfg80211_mutex);
356 /* give it a proper name */
357 dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
359 mutex_init(&rdev->mtx);
360 mutex_init(&rdev->devlist_mtx);
361 INIT_LIST_HEAD(&rdev->netdev_list);
362 spin_lock_init(&rdev->bss_lock);
363 INIT_LIST_HEAD(&rdev->bss_list);
364 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
366 #ifdef CONFIG_CFG80211_WEXT
367 rdev->wiphy.wext = &cfg80211_wext_handler;
370 device_initialize(&rdev->wiphy.dev);
371 rdev->wiphy.dev.class = &ieee80211_class;
372 rdev->wiphy.dev.platform_data = rdev;
374 #ifdef CONFIG_CFG80211_DEFAULT_PS
375 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
378 wiphy_net_set(&rdev->wiphy, &init_net);
380 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
381 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
382 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
383 &rdev->rfkill_ops, rdev);
390 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
391 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
392 INIT_WORK(&rdev->event_work, cfg80211_event_work);
394 init_waitqueue_head(&rdev->dev_wait);
397 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
398 * Fragmentation and RTS threshold are disabled by default with the
401 rdev->wiphy.retry_short = 7;
402 rdev->wiphy.retry_long = 4;
403 rdev->wiphy.frag_threshold = (u32) -1;
404 rdev->wiphy.rts_threshold = (u32) -1;
405 rdev->wiphy.coverage_class = 0;
409 EXPORT_SYMBOL(wiphy_new);
411 int wiphy_register(struct wiphy *wiphy)
413 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
415 enum ieee80211_band band;
416 struct ieee80211_supported_band *sband;
417 bool have_band = false;
419 u16 ifmodes = wiphy->interface_modes;
421 /* sanity check ifmodes */
423 ifmodes &= ((1 << __NL80211_IFTYPE_AFTER_LAST) - 1) & ~1;
424 if (WARN_ON(ifmodes != wiphy->interface_modes))
425 wiphy->interface_modes = ifmodes;
427 /* sanity check supported bands/channels */
428 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
429 sband = wiphy->bands[band];
435 if (WARN_ON(!sband->n_channels || !sband->n_bitrates))
439 * Since we use a u32 for rate bitmaps in
440 * ieee80211_get_response_rate, we cannot
441 * have more than 32 legacy rates.
443 if (WARN_ON(sband->n_bitrates > 32))
446 for (i = 0; i < sband->n_channels; i++) {
447 sband->channels[i].orig_flags =
448 sband->channels[i].flags;
449 sband->channels[i].orig_mag =
450 sband->channels[i].max_antenna_gain;
451 sband->channels[i].orig_mpwr =
452 sband->channels[i].max_power;
453 sband->channels[i].band = band;
464 /* check and set up bitrates */
465 ieee80211_set_bitrate_flags(wiphy);
467 res = device_add(&rdev->wiphy.dev);
471 res = rfkill_register(rdev->rfkill);
475 mutex_lock(&cfg80211_mutex);
477 /* set up regulatory info */
478 wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE);
480 list_add(&rdev->list, &cfg80211_rdev_list);
481 cfg80211_rdev_list_generation++;
483 mutex_unlock(&cfg80211_mutex);
486 rdev->wiphy.debugfsdir =
487 debugfs_create_dir(wiphy_name(&rdev->wiphy),
488 ieee80211_debugfs_dir);
489 if (IS_ERR(rdev->wiphy.debugfsdir))
490 rdev->wiphy.debugfsdir = NULL;
492 if (wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) {
493 struct regulatory_request request;
495 request.wiphy_idx = get_wiphy_idx(wiphy);
496 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
497 request.alpha2[0] = '9';
498 request.alpha2[1] = '9';
500 nl80211_send_reg_change_event(&request);
503 cfg80211_debugfs_rdev_add(rdev);
508 device_del(&rdev->wiphy.dev);
511 EXPORT_SYMBOL(wiphy_register);
513 void wiphy_rfkill_start_polling(struct wiphy *wiphy)
515 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
517 if (!rdev->ops->rfkill_poll)
519 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
520 rfkill_resume_polling(rdev->rfkill);
522 EXPORT_SYMBOL(wiphy_rfkill_start_polling);
524 void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
526 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
528 rfkill_pause_polling(rdev->rfkill);
530 EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
532 void wiphy_unregister(struct wiphy *wiphy)
534 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
536 rfkill_unregister(rdev->rfkill);
538 /* protect the device list */
539 mutex_lock(&cfg80211_mutex);
541 wait_event(rdev->dev_wait, ({
543 mutex_lock(&rdev->devlist_mtx);
544 __count = rdev->opencount;
545 mutex_unlock(&rdev->devlist_mtx);
548 mutex_lock(&rdev->devlist_mtx);
549 BUG_ON(!list_empty(&rdev->netdev_list));
550 mutex_unlock(&rdev->devlist_mtx);
553 * First remove the hardware from everywhere, this makes
554 * it impossible to find from userspace.
556 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
557 list_del(&rdev->list);
560 * Try to grab rdev->mtx. If a command is still in progress,
561 * hopefully the driver will refuse it since it's tearing
562 * down the device already. We wait for this command to complete
563 * before unlinking the item from the list.
564 * Note: as codified by the BUG_ON above we cannot get here if
565 * a virtual interface is still present. Hence, we can only get
566 * to lock contention here if userspace issues a command that
567 * identified the hardware by wiphy index.
569 cfg80211_lock_rdev(rdev);
571 cfg80211_unlock_rdev(rdev);
573 /* If this device got a regulatory hint tell core its
574 * free to listen now to a new shiny device regulatory hint */
575 reg_device_remove(wiphy);
577 cfg80211_rdev_list_generation++;
578 device_del(&rdev->wiphy.dev);
580 mutex_unlock(&cfg80211_mutex);
582 flush_work(&rdev->scan_done_wk);
583 cancel_work_sync(&rdev->conn_work);
584 flush_work(&rdev->event_work);
586 EXPORT_SYMBOL(wiphy_unregister);
588 void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
590 struct cfg80211_internal_bss *scan, *tmp;
591 rfkill_destroy(rdev->rfkill);
592 mutex_destroy(&rdev->mtx);
593 mutex_destroy(&rdev->devlist_mtx);
594 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
595 cfg80211_put_bss(&scan->pub);
599 void wiphy_free(struct wiphy *wiphy)
601 put_device(&wiphy->dev);
603 EXPORT_SYMBOL(wiphy_free);
605 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
607 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
609 if (rfkill_set_hw_state(rdev->rfkill, blocked))
610 schedule_work(&rdev->rfkill_sync);
612 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
614 static void wdev_cleanup_work(struct work_struct *work)
616 struct wireless_dev *wdev;
617 struct cfg80211_registered_device *rdev;
619 wdev = container_of(work, struct wireless_dev, cleanup_work);
620 rdev = wiphy_to_dev(wdev->wiphy);
622 cfg80211_lock_rdev(rdev);
624 if (WARN_ON(rdev->scan_req && rdev->scan_req->dev == wdev->netdev)) {
625 rdev->scan_req->aborted = true;
626 ___cfg80211_scan_done(rdev, true);
629 cfg80211_unlock_rdev(rdev);
631 mutex_lock(&rdev->devlist_mtx);
633 mutex_unlock(&rdev->devlist_mtx);
634 wake_up(&rdev->dev_wait);
636 dev_put(wdev->netdev);
639 static struct device_type wiphy_type = {
643 static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
647 struct net_device *dev = ndev;
648 struct wireless_dev *wdev = dev->ieee80211_ptr;
649 struct cfg80211_registered_device *rdev;
654 rdev = wiphy_to_dev(wdev->wiphy);
656 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
659 case NETDEV_POST_INIT:
660 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
662 case NETDEV_REGISTER:
664 * NB: cannot take rdev->mtx here because this may be
665 * called within code protected by it when interfaces
666 * are added with nl80211.
668 mutex_init(&wdev->mtx);
669 INIT_WORK(&wdev->cleanup_work, wdev_cleanup_work);
670 INIT_LIST_HEAD(&wdev->event_list);
671 spin_lock_init(&wdev->event_lock);
672 mutex_lock(&rdev->devlist_mtx);
673 list_add(&wdev->list, &rdev->netdev_list);
674 rdev->devlist_generation++;
675 /* can only change netns with wiphy */
676 dev->features |= NETIF_F_NETNS_LOCAL;
678 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
680 printk(KERN_ERR "wireless: failed to add phy80211 "
681 "symlink to netdev!\n");
684 wdev->sme_state = CFG80211_SME_IDLE;
685 mutex_unlock(&rdev->devlist_mtx);
686 #ifdef CONFIG_CFG80211_WEXT
687 wdev->wext.default_key = -1;
688 wdev->wext.default_mgmt_key = -1;
689 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
690 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
691 wdev->wext.ps = true;
693 wdev->wext.ps = false;
694 wdev->wext.ps_timeout = 100;
695 if (rdev->ops->set_power_mgmt)
696 if (rdev->ops->set_power_mgmt(wdev->wiphy, dev,
698 wdev->wext.ps_timeout)) {
699 /* assume this means it's off */
700 wdev->wext.ps = false;
703 if (!dev->ethtool_ops)
704 dev->ethtool_ops = &cfg80211_ethtool_ops;
706 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
707 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
708 dev->priv_flags |= IFF_DONT_BRIDGE;
710 case NETDEV_GOING_DOWN:
711 switch (wdev->iftype) {
712 case NL80211_IFTYPE_ADHOC:
713 cfg80211_leave_ibss(rdev, dev, true);
715 case NL80211_IFTYPE_STATION:
717 #ifdef CONFIG_CFG80211_WEXT
718 kfree(wdev->wext.ie);
719 wdev->wext.ie = NULL;
720 wdev->wext.ie_len = 0;
721 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
723 __cfg80211_disconnect(rdev, dev,
724 WLAN_REASON_DEAUTH_LEAVING, true);
725 cfg80211_mlme_down(rdev, dev);
734 queue_work(cfg80211_wq, &wdev->cleanup_work);
738 * If we have a really quick DOWN/UP succession we may
739 * have this work still pending ... cancel it and see
740 * if it was pending, in which case we need to account
741 * for some of the work it would have done.
743 if (cancel_work_sync(&wdev->cleanup_work)) {
744 mutex_lock(&rdev->devlist_mtx);
746 mutex_unlock(&rdev->devlist_mtx);
749 cfg80211_lock_rdev(rdev);
750 mutex_lock(&rdev->devlist_mtx);
751 #ifdef CONFIG_CFG80211_WEXT
753 switch (wdev->iftype) {
754 case NL80211_IFTYPE_ADHOC:
755 cfg80211_ibss_wext_join(rdev, wdev);
757 case NL80211_IFTYPE_STATION:
758 cfg80211_mgd_wext_connect(rdev, wdev);
766 mutex_unlock(&rdev->devlist_mtx);
767 cfg80211_unlock_rdev(rdev);
769 case NETDEV_UNREGISTER:
771 * NB: cannot take rdev->mtx here because this may be
772 * called within code protected by it when interfaces
773 * are removed with nl80211.
775 mutex_lock(&rdev->devlist_mtx);
777 * It is possible to get NETDEV_UNREGISTER
778 * multiple times. To detect that, check
779 * that the interface is still on the list
780 * of registered interfaces, and only then
781 * remove and clean it up.
783 if (!list_empty(&wdev->list)) {
784 sysfs_remove_link(&dev->dev.kobj, "phy80211");
785 list_del_init(&wdev->list);
786 rdev->devlist_generation++;
787 #ifdef CONFIG_CFG80211_WEXT
788 kfree(wdev->wext.keys);
791 mutex_unlock(&rdev->devlist_mtx);
794 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
795 return notifier_from_errno(-EOPNOTSUPP);
796 if (rfkill_blocked(rdev->rfkill))
797 return notifier_from_errno(-ERFKILL);
804 static struct notifier_block cfg80211_netdev_notifier = {
805 .notifier_call = cfg80211_netdev_notifier_call,
808 static void __net_exit cfg80211_pernet_exit(struct net *net)
810 struct cfg80211_registered_device *rdev;
813 mutex_lock(&cfg80211_mutex);
814 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
815 if (net_eq(wiphy_net(&rdev->wiphy), net))
816 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
818 mutex_unlock(&cfg80211_mutex);
822 static struct pernet_operations cfg80211_pernet_ops = {
823 .exit = cfg80211_pernet_exit,
826 static int __init cfg80211_init(void)
830 err = register_pernet_device(&cfg80211_pernet_ops);
832 goto out_fail_pernet;
834 err = wiphy_sysfs_init();
838 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
840 goto out_fail_notifier;
842 err = nl80211_init();
844 goto out_fail_nl80211;
846 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
848 err = regulatory_init();
852 cfg80211_wq = create_singlethread_workqueue("cfg80211");
861 debugfs_remove(ieee80211_debugfs_dir);
863 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
867 unregister_pernet_device(&cfg80211_pernet_ops);
871 subsys_initcall(cfg80211_init);
873 static void cfg80211_exit(void)
875 debugfs_remove(ieee80211_debugfs_dir);
877 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
880 unregister_pernet_device(&cfg80211_pernet_ops);
881 destroy_workqueue(cfg80211_wq);
883 module_exit(cfg80211_exit);