2 * This is the linux wireless configuration interface.
4 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
8 #include <linux/module.h>
10 #include <linux/list.h>
11 #include <linux/slab.h>
12 #include <linux/nl80211.h>
13 #include <linux/debugfs.h>
14 #include <linux/notifier.h>
15 #include <linux/device.h>
16 #include <linux/etherdevice.h>
17 #include <linux/rtnetlink.h>
18 #include <linux/sched.h>
19 #include <net/genetlink.h>
20 #include <net/cfg80211.h>
25 #include "wext-compat.h"
28 /* name for sysfs, %d is appended */
29 #define PHY_NAME "phy"
31 MODULE_AUTHOR("Johannes Berg");
32 MODULE_LICENSE("GPL");
33 MODULE_DESCRIPTION("wireless configuration support");
35 /* RCU-protected (and cfg80211_mutex for writers) */
36 LIST_HEAD(cfg80211_rdev_list);
37 int cfg80211_rdev_list_generation;
39 DEFINE_MUTEX(cfg80211_mutex);
42 static struct dentry *ieee80211_debugfs_dir;
44 /* for the cleanup, scan and event works */
45 struct workqueue_struct *cfg80211_wq;
47 /* requires cfg80211_mutex to be held! */
48 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
50 struct cfg80211_registered_device *result = NULL, *rdev;
52 if (!wiphy_idx_valid(wiphy_idx))
55 assert_cfg80211_lock();
57 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
58 if (rdev->wiphy_idx == wiphy_idx) {
67 int get_wiphy_idx(struct wiphy *wiphy)
69 struct cfg80211_registered_device *rdev;
71 return WIPHY_IDX_STALE;
72 rdev = wiphy_to_dev(wiphy);
73 return rdev->wiphy_idx;
76 /* requires cfg80211_rdev_mutex to be held! */
77 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
79 struct cfg80211_registered_device *rdev;
81 if (!wiphy_idx_valid(wiphy_idx))
84 assert_cfg80211_lock();
86 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
92 /* requires cfg80211_mutex to be held! */
93 struct cfg80211_registered_device *
94 __cfg80211_rdev_from_info(struct genl_info *info)
97 struct cfg80211_registered_device *bywiphyidx = NULL, *byifidx = NULL;
98 struct net_device *dev;
101 assert_cfg80211_lock();
103 if (info->attrs[NL80211_ATTR_WIPHY]) {
104 bywiphyidx = cfg80211_rdev_by_wiphy_idx(
105 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY]));
109 if (info->attrs[NL80211_ATTR_IFINDEX]) {
110 ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
111 dev = dev_get_by_index(genl_info_net(info), ifindex);
113 if (dev->ieee80211_ptr)
115 wiphy_to_dev(dev->ieee80211_ptr->wiphy);
121 if (bywiphyidx && byifidx) {
122 if (bywiphyidx != byifidx)
123 return ERR_PTR(-EINVAL);
125 return bywiphyidx; /* == byifidx */
136 struct cfg80211_registered_device *
137 cfg80211_get_dev_from_info(struct genl_info *info)
139 struct cfg80211_registered_device *rdev;
141 mutex_lock(&cfg80211_mutex);
142 rdev = __cfg80211_rdev_from_info(info);
144 /* if it is not an error we grab the lock on
145 * it to assure it won't be going away while
146 * we operate on it */
148 mutex_lock(&rdev->mtx);
150 mutex_unlock(&cfg80211_mutex);
155 struct cfg80211_registered_device *
156 cfg80211_get_dev_from_ifindex(struct net *net, int ifindex)
158 struct cfg80211_registered_device *rdev = ERR_PTR(-ENODEV);
159 struct net_device *dev;
161 mutex_lock(&cfg80211_mutex);
162 dev = dev_get_by_index(net, ifindex);
165 if (dev->ieee80211_ptr) {
166 rdev = wiphy_to_dev(dev->ieee80211_ptr->wiphy);
167 mutex_lock(&rdev->mtx);
169 rdev = ERR_PTR(-ENODEV);
172 mutex_unlock(&cfg80211_mutex);
176 /* requires cfg80211_mutex to be held */
177 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
180 struct cfg80211_registered_device *rdev2;
181 int wiphy_idx, taken = -1, result, digits;
183 assert_cfg80211_lock();
185 /* prohibit calling the thing phy%d when %d is not its number */
186 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
187 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
188 /* count number of places needed to print wiphy_idx */
190 while (wiphy_idx /= 10)
193 * deny the name if it is phy<idx> where <idx> is printed
194 * without leading zeroes. taken == strlen(newname) here
196 if (taken == strlen(PHY_NAME) + digits)
201 /* Ignore nop renames */
202 if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0)
205 /* Ensure another device does not already have this name. */
206 list_for_each_entry(rdev2, &cfg80211_rdev_list, list)
207 if (strcmp(newname, dev_name(&rdev2->wiphy.dev)) == 0)
210 result = device_rename(&rdev->wiphy.dev, newname);
214 if (rdev->wiphy.debugfsdir &&
215 !debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
216 rdev->wiphy.debugfsdir,
217 rdev->wiphy.debugfsdir->d_parent,
219 printk(KERN_ERR "cfg80211: failed to rename debugfs dir to %s!\n",
222 nl80211_notify_dev_rename(rdev);
227 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
230 struct wireless_dev *wdev;
233 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK))
236 list_for_each_entry(wdev, &rdev->netdev_list, list) {
237 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
238 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
241 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
245 /* failed -- clean up to old netns */
246 net = wiphy_net(&rdev->wiphy);
248 list_for_each_entry_continue_reverse(wdev, &rdev->netdev_list,
250 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
251 err = dev_change_net_namespace(wdev->netdev, net,
254 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
260 wiphy_net_set(&rdev->wiphy, net);
262 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev));
268 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
270 struct cfg80211_registered_device *rdev = data;
272 rdev->ops->rfkill_poll(&rdev->wiphy);
275 static int cfg80211_rfkill_set_block(void *data, bool blocked)
277 struct cfg80211_registered_device *rdev = data;
278 struct wireless_dev *wdev;
284 mutex_lock(&rdev->devlist_mtx);
286 list_for_each_entry(wdev, &rdev->netdev_list, list)
287 dev_close(wdev->netdev);
289 mutex_unlock(&rdev->devlist_mtx);
295 static void cfg80211_rfkill_sync_work(struct work_struct *work)
297 struct cfg80211_registered_device *rdev;
299 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync);
300 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
303 static void cfg80211_event_work(struct work_struct *work)
305 struct cfg80211_registered_device *rdev;
307 rdev = container_of(work, struct cfg80211_registered_device,
311 cfg80211_lock_rdev(rdev);
313 cfg80211_process_rdev_events(rdev);
314 cfg80211_unlock_rdev(rdev);
318 /* exported functions */
320 struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
322 static int wiphy_counter;
324 struct cfg80211_registered_device *rdev;
327 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
328 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
329 WARN_ON(ops->connect && !ops->disconnect);
330 WARN_ON(ops->join_ibss && !ops->leave_ibss);
331 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
332 WARN_ON(ops->add_station && !ops->del_station);
333 WARN_ON(ops->add_mpath && !ops->del_mpath);
335 alloc_size = sizeof(*rdev) + sizeof_priv;
337 rdev = kzalloc(alloc_size, GFP_KERNEL);
343 mutex_lock(&cfg80211_mutex);
345 rdev->wiphy_idx = wiphy_counter++;
347 if (unlikely(!wiphy_idx_valid(rdev->wiphy_idx))) {
349 mutex_unlock(&cfg80211_mutex);
355 mutex_unlock(&cfg80211_mutex);
357 /* give it a proper name */
358 dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
360 mutex_init(&rdev->mtx);
361 mutex_init(&rdev->devlist_mtx);
362 INIT_LIST_HEAD(&rdev->netdev_list);
363 spin_lock_init(&rdev->bss_lock);
364 INIT_LIST_HEAD(&rdev->bss_list);
365 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
367 #ifdef CONFIG_CFG80211_WEXT
368 rdev->wiphy.wext = &cfg80211_wext_handler;
371 device_initialize(&rdev->wiphy.dev);
372 rdev->wiphy.dev.class = &ieee80211_class;
373 rdev->wiphy.dev.platform_data = rdev;
375 #ifdef CONFIG_CFG80211_DEFAULT_PS
376 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
379 wiphy_net_set(&rdev->wiphy, &init_net);
381 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
382 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
383 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
384 &rdev->rfkill_ops, rdev);
391 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
392 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
393 INIT_WORK(&rdev->event_work, cfg80211_event_work);
395 init_waitqueue_head(&rdev->dev_wait);
398 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
399 * Fragmentation and RTS threshold are disabled by default with the
402 rdev->wiphy.retry_short = 7;
403 rdev->wiphy.retry_long = 4;
404 rdev->wiphy.frag_threshold = (u32) -1;
405 rdev->wiphy.rts_threshold = (u32) -1;
406 rdev->wiphy.coverage_class = 0;
410 EXPORT_SYMBOL(wiphy_new);
412 int wiphy_register(struct wiphy *wiphy)
414 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
416 enum ieee80211_band band;
417 struct ieee80211_supported_band *sband;
418 bool have_band = false;
420 u16 ifmodes = wiphy->interface_modes;
422 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
425 if (WARN_ON(wiphy->addresses &&
426 !is_zero_ether_addr(wiphy->perm_addr) &&
427 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
431 if (wiphy->addresses)
432 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
434 /* sanity check ifmodes */
436 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
437 if (WARN_ON(ifmodes != wiphy->interface_modes))
438 wiphy->interface_modes = ifmodes;
440 /* sanity check supported bands/channels */
441 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
442 sband = wiphy->bands[band];
448 if (WARN_ON(!sband->n_channels || !sband->n_bitrates))
452 * Since we use a u32 for rate bitmaps in
453 * ieee80211_get_response_rate, we cannot
454 * have more than 32 legacy rates.
456 if (WARN_ON(sband->n_bitrates > 32))
459 for (i = 0; i < sband->n_channels; i++) {
460 sband->channels[i].orig_flags =
461 sband->channels[i].flags;
462 sband->channels[i].orig_mag =
463 sband->channels[i].max_antenna_gain;
464 sband->channels[i].orig_mpwr =
465 sband->channels[i].max_power;
466 sband->channels[i].band = band;
477 /* check and set up bitrates */
478 ieee80211_set_bitrate_flags(wiphy);
480 mutex_lock(&cfg80211_mutex);
482 res = device_add(&rdev->wiphy.dev);
486 res = rfkill_register(rdev->rfkill);
490 /* set up regulatory info */
491 wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE);
493 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
494 cfg80211_rdev_list_generation++;
497 rdev->wiphy.debugfsdir =
498 debugfs_create_dir(wiphy_name(&rdev->wiphy),
499 ieee80211_debugfs_dir);
500 if (IS_ERR(rdev->wiphy.debugfsdir))
501 rdev->wiphy.debugfsdir = NULL;
503 if (wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) {
504 struct regulatory_request request;
506 request.wiphy_idx = get_wiphy_idx(wiphy);
507 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
508 request.alpha2[0] = '9';
509 request.alpha2[1] = '9';
511 nl80211_send_reg_change_event(&request);
514 cfg80211_debugfs_rdev_add(rdev);
515 mutex_unlock(&cfg80211_mutex);
520 device_del(&rdev->wiphy.dev);
523 mutex_unlock(&cfg80211_mutex);
526 EXPORT_SYMBOL(wiphy_register);
528 void wiphy_rfkill_start_polling(struct wiphy *wiphy)
530 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
532 if (!rdev->ops->rfkill_poll)
534 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
535 rfkill_resume_polling(rdev->rfkill);
537 EXPORT_SYMBOL(wiphy_rfkill_start_polling);
539 void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
541 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
543 rfkill_pause_polling(rdev->rfkill);
545 EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
547 void wiphy_unregister(struct wiphy *wiphy)
549 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
551 rfkill_unregister(rdev->rfkill);
553 /* protect the device list */
554 mutex_lock(&cfg80211_mutex);
556 wait_event(rdev->dev_wait, ({
558 mutex_lock(&rdev->devlist_mtx);
559 __count = rdev->opencount;
560 mutex_unlock(&rdev->devlist_mtx);
563 mutex_lock(&rdev->devlist_mtx);
564 BUG_ON(!list_empty(&rdev->netdev_list));
565 mutex_unlock(&rdev->devlist_mtx);
568 * First remove the hardware from everywhere, this makes
569 * it impossible to find from userspace.
571 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
572 list_del_rcu(&rdev->list);
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 present. Hence, we can only get
582 * to lock contention here if userspace issues a command that
583 * identified the hardware by wiphy index.
585 cfg80211_lock_rdev(rdev);
587 cfg80211_unlock_rdev(rdev);
589 /* If this device got a regulatory hint tell core its
590 * free to listen now to a new shiny device regulatory hint */
591 reg_device_remove(wiphy);
593 cfg80211_rdev_list_generation++;
594 device_del(&rdev->wiphy.dev);
596 mutex_unlock(&cfg80211_mutex);
598 flush_work(&rdev->scan_done_wk);
599 cancel_work_sync(&rdev->conn_work);
600 flush_work(&rdev->event_work);
602 EXPORT_SYMBOL(wiphy_unregister);
604 void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
606 struct cfg80211_internal_bss *scan, *tmp;
607 rfkill_destroy(rdev->rfkill);
608 mutex_destroy(&rdev->mtx);
609 mutex_destroy(&rdev->devlist_mtx);
610 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
611 cfg80211_put_bss(&scan->pub);
615 void wiphy_free(struct wiphy *wiphy)
617 put_device(&wiphy->dev);
619 EXPORT_SYMBOL(wiphy_free);
621 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
623 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
625 if (rfkill_set_hw_state(rdev->rfkill, blocked))
626 schedule_work(&rdev->rfkill_sync);
628 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
630 static void wdev_cleanup_work(struct work_struct *work)
632 struct wireless_dev *wdev;
633 struct cfg80211_registered_device *rdev;
635 wdev = container_of(work, struct wireless_dev, cleanup_work);
636 rdev = wiphy_to_dev(wdev->wiphy);
638 cfg80211_lock_rdev(rdev);
640 if (WARN_ON(rdev->scan_req && rdev->scan_req->dev == wdev->netdev)) {
641 rdev->scan_req->aborted = true;
642 ___cfg80211_scan_done(rdev, true);
645 cfg80211_unlock_rdev(rdev);
647 mutex_lock(&rdev->devlist_mtx);
649 mutex_unlock(&rdev->devlist_mtx);
650 wake_up(&rdev->dev_wait);
652 dev_put(wdev->netdev);
655 static struct device_type wiphy_type = {
659 static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
663 struct net_device *dev = ndev;
664 struct wireless_dev *wdev = dev->ieee80211_ptr;
665 struct cfg80211_registered_device *rdev;
670 rdev = wiphy_to_dev(wdev->wiphy);
672 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
675 case NETDEV_POST_INIT:
676 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
678 case NETDEV_REGISTER:
680 * NB: cannot take rdev->mtx here because this may be
681 * called within code protected by it when interfaces
682 * are added with nl80211.
684 mutex_init(&wdev->mtx);
685 INIT_WORK(&wdev->cleanup_work, wdev_cleanup_work);
686 INIT_LIST_HEAD(&wdev->event_list);
687 spin_lock_init(&wdev->event_lock);
688 INIT_LIST_HEAD(&wdev->mgmt_registrations);
689 spin_lock_init(&wdev->mgmt_registrations_lock);
691 mutex_lock(&rdev->devlist_mtx);
692 list_add_rcu(&wdev->list, &rdev->netdev_list);
693 rdev->devlist_generation++;
694 /* can only change netns with wiphy */
695 dev->features |= NETIF_F_NETNS_LOCAL;
697 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
699 printk(KERN_ERR "wireless: failed to add phy80211 "
700 "symlink to netdev!\n");
703 wdev->sme_state = CFG80211_SME_IDLE;
704 mutex_unlock(&rdev->devlist_mtx);
705 #ifdef CONFIG_CFG80211_WEXT
706 wdev->wext.default_key = -1;
707 wdev->wext.default_mgmt_key = -1;
708 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
711 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
715 /* allow mac80211 to determine the timeout */
716 wdev->ps_timeout = -1;
717 if (rdev->ops->set_power_mgmt)
718 if (rdev->ops->set_power_mgmt(wdev->wiphy, dev,
721 /* assume this means it's off */
725 if (!dev->ethtool_ops)
726 dev->ethtool_ops = &cfg80211_ethtool_ops;
728 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
729 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
730 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
731 dev->priv_flags |= IFF_DONT_BRIDGE;
733 case NETDEV_GOING_DOWN:
734 switch (wdev->iftype) {
735 case NL80211_IFTYPE_ADHOC:
736 cfg80211_leave_ibss(rdev, dev, true);
738 case NL80211_IFTYPE_P2P_CLIENT:
739 case NL80211_IFTYPE_STATION:
741 #ifdef CONFIG_CFG80211_WEXT
742 kfree(wdev->wext.ie);
743 wdev->wext.ie = NULL;
744 wdev->wext.ie_len = 0;
745 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
747 __cfg80211_disconnect(rdev, dev,
748 WLAN_REASON_DEAUTH_LEAVING, true);
749 cfg80211_mlme_down(rdev, dev);
758 queue_work(cfg80211_wq, &wdev->cleanup_work);
762 * If we have a really quick DOWN/UP succession we may
763 * have this work still pending ... cancel it and see
764 * if it was pending, in which case we need to account
765 * for some of the work it would have done.
767 if (cancel_work_sync(&wdev->cleanup_work)) {
768 mutex_lock(&rdev->devlist_mtx);
770 mutex_unlock(&rdev->devlist_mtx);
773 cfg80211_lock_rdev(rdev);
774 mutex_lock(&rdev->devlist_mtx);
775 #ifdef CONFIG_CFG80211_WEXT
777 switch (wdev->iftype) {
778 case NL80211_IFTYPE_ADHOC:
779 cfg80211_ibss_wext_join(rdev, wdev);
781 case NL80211_IFTYPE_STATION:
782 cfg80211_mgd_wext_connect(rdev, wdev);
790 mutex_unlock(&rdev->devlist_mtx);
791 cfg80211_unlock_rdev(rdev);
793 case NETDEV_UNREGISTER:
795 * NB: cannot take rdev->mtx here because this may be
796 * called within code protected by it when interfaces
797 * are removed with nl80211.
799 mutex_lock(&rdev->devlist_mtx);
801 * It is possible to get NETDEV_UNREGISTER
802 * multiple times. To detect that, check
803 * that the interface is still on the list
804 * of registered interfaces, and only then
805 * remove and clean it up.
807 if (!list_empty(&wdev->list)) {
808 sysfs_remove_link(&dev->dev.kobj, "phy80211");
809 list_del_rcu(&wdev->list);
810 rdev->devlist_generation++;
811 cfg80211_mlme_purge_registrations(wdev);
812 #ifdef CONFIG_CFG80211_WEXT
813 kfree(wdev->wext.keys);
816 mutex_unlock(&rdev->devlist_mtx);
818 * synchronise (so that we won't find this netdev
819 * from other code any more) and then clear the list
820 * head so that the above code can safely check for
821 * !list_empty() to avoid double-cleanup.
824 INIT_LIST_HEAD(&wdev->list);
827 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
828 return notifier_from_errno(-EOPNOTSUPP);
829 if (rfkill_blocked(rdev->rfkill))
830 return notifier_from_errno(-ERFKILL);
837 static struct notifier_block cfg80211_netdev_notifier = {
838 .notifier_call = cfg80211_netdev_notifier_call,
841 static void __net_exit cfg80211_pernet_exit(struct net *net)
843 struct cfg80211_registered_device *rdev;
846 mutex_lock(&cfg80211_mutex);
847 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
848 if (net_eq(wiphy_net(&rdev->wiphy), net))
849 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
851 mutex_unlock(&cfg80211_mutex);
855 static struct pernet_operations cfg80211_pernet_ops = {
856 .exit = cfg80211_pernet_exit,
859 static int __init cfg80211_init(void)
863 err = register_pernet_device(&cfg80211_pernet_ops);
865 goto out_fail_pernet;
867 err = wiphy_sysfs_init();
871 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
873 goto out_fail_notifier;
875 err = nl80211_init();
877 goto out_fail_nl80211;
879 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
881 err = regulatory_init();
885 cfg80211_wq = create_singlethread_workqueue("cfg80211");
894 debugfs_remove(ieee80211_debugfs_dir);
896 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
900 unregister_pernet_device(&cfg80211_pernet_ops);
904 subsys_initcall(cfg80211_init);
906 static void __exit cfg80211_exit(void)
908 debugfs_remove(ieee80211_debugfs_dir);
910 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
913 unregister_pernet_device(&cfg80211_pernet_ops);
914 destroy_workqueue(cfg80211_wq);
916 module_exit(cfg80211_exit);