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 <net/genetlink.h>
18 #include <net/cfg80211.h>
23 #include "wext-compat.h"
25 /* name for sysfs, %d is appended */
26 #define PHY_NAME "phy"
28 MODULE_AUTHOR("Johannes Berg");
29 MODULE_LICENSE("GPL");
30 MODULE_DESCRIPTION("wireless configuration support");
32 /* RCU might be appropriate here since we usually
33 * only read the list, and that can happen quite
34 * often because we need to do it for each command */
35 LIST_HEAD(cfg80211_rdev_list);
36 int cfg80211_rdev_list_generation;
39 * This is used to protect the cfg80211_rdev_list
41 DEFINE_MUTEX(cfg80211_mutex);
44 static struct dentry *ieee80211_debugfs_dir;
46 /* requires cfg80211_mutex to be held! */
47 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
49 struct cfg80211_registered_device *result = NULL, *rdev;
51 if (!wiphy_idx_valid(wiphy_idx))
54 assert_cfg80211_lock();
56 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
57 if (rdev->wiphy_idx == wiphy_idx) {
66 int get_wiphy_idx(struct wiphy *wiphy)
68 struct cfg80211_registered_device *rdev;
70 return WIPHY_IDX_STALE;
71 rdev = wiphy_to_dev(wiphy);
72 return rdev->wiphy_idx;
75 /* requires cfg80211_rdev_mutex to be held! */
76 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
78 struct cfg80211_registered_device *rdev;
80 if (!wiphy_idx_valid(wiphy_idx))
83 assert_cfg80211_lock();
85 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
91 /* requires cfg80211_mutex to be held! */
92 struct cfg80211_registered_device *
93 __cfg80211_rdev_from_info(struct genl_info *info)
96 struct cfg80211_registered_device *bywiphyidx = NULL, *byifidx = NULL;
97 struct net_device *dev;
100 assert_cfg80211_lock();
102 if (info->attrs[NL80211_ATTR_WIPHY]) {
103 bywiphyidx = cfg80211_rdev_by_wiphy_idx(
104 nla_get_u32(info->attrs[NL80211_ATTR_WIPHY]));
108 if (info->attrs[NL80211_ATTR_IFINDEX]) {
109 ifindex = nla_get_u32(info->attrs[NL80211_ATTR_IFINDEX]);
110 dev = dev_get_by_index(genl_info_net(info), ifindex);
112 if (dev->ieee80211_ptr)
114 wiphy_to_dev(dev->ieee80211_ptr->wiphy);
120 if (bywiphyidx && byifidx) {
121 if (bywiphyidx != byifidx)
122 return ERR_PTR(-EINVAL);
124 return bywiphyidx; /* == byifidx */
135 struct cfg80211_registered_device *
136 cfg80211_get_dev_from_info(struct genl_info *info)
138 struct cfg80211_registered_device *rdev;
140 mutex_lock(&cfg80211_mutex);
141 rdev = __cfg80211_rdev_from_info(info);
143 /* if it is not an error we grab the lock on
144 * it to assure it won't be going away while
145 * we operate on it */
147 mutex_lock(&rdev->mtx);
149 mutex_unlock(&cfg80211_mutex);
154 struct cfg80211_registered_device *
155 cfg80211_get_dev_from_ifindex(struct net *net, int ifindex)
157 struct cfg80211_registered_device *rdev = ERR_PTR(-ENODEV);
158 struct net_device *dev;
160 mutex_lock(&cfg80211_mutex);
161 dev = dev_get_by_index(net, ifindex);
164 if (dev->ieee80211_ptr) {
165 rdev = wiphy_to_dev(dev->ieee80211_ptr->wiphy);
166 mutex_lock(&rdev->mtx);
168 rdev = ERR_PTR(-ENODEV);
171 mutex_unlock(&cfg80211_mutex);
175 /* requires cfg80211_mutex to be held */
176 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
179 struct cfg80211_registered_device *rdev2;
180 int wiphy_idx, taken = -1, result, digits;
182 assert_cfg80211_lock();
184 /* prohibit calling the thing phy%d when %d is not its number */
185 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
186 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
187 /* count number of places needed to print wiphy_idx */
189 while (wiphy_idx /= 10)
192 * deny the name if it is phy<idx> where <idx> is printed
193 * without leading zeroes. taken == strlen(newname) here
195 if (taken == strlen(PHY_NAME) + digits)
200 /* Ignore nop renames */
201 if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0)
204 /* Ensure another device does not already have this name. */
205 list_for_each_entry(rdev2, &cfg80211_rdev_list, list)
206 if (strcmp(newname, dev_name(&rdev2->wiphy.dev)) == 0)
209 result = device_rename(&rdev->wiphy.dev, newname);
213 if (rdev->wiphy.debugfsdir &&
214 !debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
215 rdev->wiphy.debugfsdir,
216 rdev->wiphy.debugfsdir->d_parent,
218 printk(KERN_ERR "cfg80211: failed to rename debugfs dir to %s!\n",
221 nl80211_notify_dev_rename(rdev);
226 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
229 struct wireless_dev *wdev;
232 if (!rdev->wiphy.netnsok)
235 list_for_each_entry(wdev, &rdev->netdev_list, list) {
236 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
237 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
240 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
244 /* failed -- clean up to old netns */
245 net = wiphy_net(&rdev->wiphy);
247 list_for_each_entry_continue_reverse(wdev, &rdev->netdev_list,
249 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
250 err = dev_change_net_namespace(wdev->netdev, net,
253 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
257 wiphy_net_set(&rdev->wiphy, net);
262 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
264 struct cfg80211_registered_device *rdev = data;
266 rdev->ops->rfkill_poll(&rdev->wiphy);
269 static int cfg80211_rfkill_set_block(void *data, bool blocked)
271 struct cfg80211_registered_device *rdev = data;
272 struct wireless_dev *wdev;
278 mutex_lock(&rdev->devlist_mtx);
280 list_for_each_entry(wdev, &rdev->netdev_list, list)
281 dev_close(wdev->netdev);
283 mutex_unlock(&rdev->devlist_mtx);
289 static void cfg80211_rfkill_sync_work(struct work_struct *work)
291 struct cfg80211_registered_device *rdev;
293 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync);
294 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
297 static void cfg80211_process_events(struct wireless_dev *wdev)
299 struct cfg80211_event *ev;
302 spin_lock_irqsave(&wdev->event_lock, flags);
303 while (!list_empty(&wdev->event_list)) {
304 ev = list_first_entry(&wdev->event_list,
305 struct cfg80211_event, list);
307 spin_unlock_irqrestore(&wdev->event_lock, flags);
311 case EVENT_CONNECT_RESULT:
312 __cfg80211_connect_result(
313 wdev->netdev, is_zero_ether_addr(ev->cr.bssid) ?
315 ev->cr.req_ie, ev->cr.req_ie_len,
316 ev->cr.resp_ie, ev->cr.resp_ie_len,
318 ev->cr.status == WLAN_STATUS_SUCCESS,
322 __cfg80211_roamed(wdev, ev->rm.bssid,
323 ev->rm.req_ie, ev->rm.req_ie_len,
324 ev->rm.resp_ie, ev->rm.resp_ie_len);
326 case EVENT_DISCONNECTED:
327 __cfg80211_disconnected(wdev->netdev,
328 ev->dc.ie, ev->dc.ie_len,
329 ev->dc.reason, true);
331 case EVENT_IBSS_JOINED:
332 __cfg80211_ibss_joined(wdev->netdev, ev->ij.bssid);
339 spin_lock_irqsave(&wdev->event_lock, flags);
341 spin_unlock_irqrestore(&wdev->event_lock, flags);
344 static void cfg80211_event_work(struct work_struct *work)
346 struct cfg80211_registered_device *rdev;
347 struct wireless_dev *wdev;
349 rdev = container_of(work, struct cfg80211_registered_device,
353 cfg80211_lock_rdev(rdev);
354 mutex_lock(&rdev->devlist_mtx);
356 list_for_each_entry(wdev, &rdev->netdev_list, list)
357 cfg80211_process_events(wdev);
359 mutex_unlock(&rdev->devlist_mtx);
360 cfg80211_unlock_rdev(rdev);
364 /* exported functions */
366 struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
368 static int wiphy_counter;
370 struct cfg80211_registered_device *rdev;
373 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
374 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
375 WARN_ON(ops->connect && !ops->disconnect);
376 WARN_ON(ops->join_ibss && !ops->leave_ibss);
377 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
378 WARN_ON(ops->add_station && !ops->del_station);
379 WARN_ON(ops->add_mpath && !ops->del_mpath);
381 alloc_size = sizeof(*rdev) + sizeof_priv;
383 rdev = kzalloc(alloc_size, GFP_KERNEL);
389 mutex_lock(&cfg80211_mutex);
391 rdev->wiphy_idx = wiphy_counter++;
393 if (unlikely(!wiphy_idx_valid(rdev->wiphy_idx))) {
395 mutex_unlock(&cfg80211_mutex);
401 mutex_unlock(&cfg80211_mutex);
403 /* give it a proper name */
404 dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
406 mutex_init(&rdev->mtx);
407 mutex_init(&rdev->devlist_mtx);
408 INIT_LIST_HEAD(&rdev->netdev_list);
409 spin_lock_init(&rdev->bss_lock);
410 INIT_LIST_HEAD(&rdev->bss_list);
411 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
413 device_initialize(&rdev->wiphy.dev);
414 rdev->wiphy.dev.class = &ieee80211_class;
415 rdev->wiphy.dev.platform_data = rdev;
417 rdev->wiphy.ps_default = CONFIG_CFG80211_DEFAULT_PS_VALUE;
419 wiphy_net_set(&rdev->wiphy, &init_net);
421 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
422 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
423 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
424 &rdev->rfkill_ops, rdev);
431 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
432 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
433 INIT_WORK(&rdev->event_work, cfg80211_event_work);
435 init_waitqueue_head(&rdev->dev_wait);
438 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
439 * Fragmentation and RTS threshold are disabled by default with the
442 rdev->wiphy.retry_short = 7;
443 rdev->wiphy.retry_long = 4;
444 rdev->wiphy.frag_threshold = (u32) -1;
445 rdev->wiphy.rts_threshold = (u32) -1;
449 EXPORT_SYMBOL(wiphy_new);
451 int wiphy_register(struct wiphy *wiphy)
453 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
455 enum ieee80211_band band;
456 struct ieee80211_supported_band *sband;
457 bool have_band = false;
459 u16 ifmodes = wiphy->interface_modes;
461 /* sanity check ifmodes */
463 ifmodes &= ((1 << __NL80211_IFTYPE_AFTER_LAST) - 1) & ~1;
464 if (WARN_ON(ifmodes != wiphy->interface_modes))
465 wiphy->interface_modes = ifmodes;
467 /* sanity check supported bands/channels */
468 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
469 sband = wiphy->bands[band];
475 if (WARN_ON(!sband->n_channels || !sband->n_bitrates))
479 * Since we use a u32 for rate bitmaps in
480 * ieee80211_get_response_rate, we cannot
481 * have more than 32 legacy rates.
483 if (WARN_ON(sband->n_bitrates > 32))
486 for (i = 0; i < sband->n_channels; i++) {
487 sband->channels[i].orig_flags =
488 sband->channels[i].flags;
489 sband->channels[i].orig_mag =
490 sband->channels[i].max_antenna_gain;
491 sband->channels[i].orig_mpwr =
492 sband->channels[i].max_power;
493 sband->channels[i].band = band;
504 /* check and set up bitrates */
505 ieee80211_set_bitrate_flags(wiphy);
507 res = device_add(&rdev->wiphy.dev);
511 res = rfkill_register(rdev->rfkill);
515 mutex_lock(&cfg80211_mutex);
517 /* set up regulatory info */
518 wiphy_update_regulatory(wiphy, NL80211_REGDOM_SET_BY_CORE);
520 list_add(&rdev->list, &cfg80211_rdev_list);
521 cfg80211_rdev_list_generation++;
523 mutex_unlock(&cfg80211_mutex);
526 rdev->wiphy.debugfsdir =
527 debugfs_create_dir(wiphy_name(&rdev->wiphy),
528 ieee80211_debugfs_dir);
529 if (IS_ERR(rdev->wiphy.debugfsdir))
530 rdev->wiphy.debugfsdir = NULL;
532 if (wiphy->custom_regulatory) {
533 struct regulatory_request request;
535 request.wiphy_idx = get_wiphy_idx(wiphy);
536 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
537 request.alpha2[0] = '9';
538 request.alpha2[1] = '9';
540 nl80211_send_reg_change_event(&request);
543 cfg80211_debugfs_rdev_add(rdev);
548 device_del(&rdev->wiphy.dev);
551 EXPORT_SYMBOL(wiphy_register);
553 void wiphy_rfkill_start_polling(struct wiphy *wiphy)
555 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
557 if (!rdev->ops->rfkill_poll)
559 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
560 rfkill_resume_polling(rdev->rfkill);
562 EXPORT_SYMBOL(wiphy_rfkill_start_polling);
564 void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
566 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
568 rfkill_pause_polling(rdev->rfkill);
570 EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
572 void wiphy_unregister(struct wiphy *wiphy)
574 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
576 rfkill_unregister(rdev->rfkill);
578 /* protect the device list */
579 mutex_lock(&cfg80211_mutex);
581 wait_event(rdev->dev_wait, ({
583 mutex_lock(&rdev->devlist_mtx);
584 __count = rdev->opencount;
585 mutex_unlock(&rdev->devlist_mtx);
588 mutex_lock(&rdev->devlist_mtx);
589 BUG_ON(!list_empty(&rdev->netdev_list));
590 mutex_unlock(&rdev->devlist_mtx);
593 * First remove the hardware from everywhere, this makes
594 * it impossible to find from userspace.
596 cfg80211_debugfs_rdev_del(rdev);
597 list_del(&rdev->list);
600 * Try to grab rdev->mtx. If a command is still in progress,
601 * hopefully the driver will refuse it since it's tearing
602 * down the device already. We wait for this command to complete
603 * before unlinking the item from the list.
604 * Note: as codified by the BUG_ON above we cannot get here if
605 * a virtual interface is still present. Hence, we can only get
606 * to lock contention here if userspace issues a command that
607 * identified the hardware by wiphy index.
609 cfg80211_lock_rdev(rdev);
611 cfg80211_unlock_rdev(rdev);
613 /* If this device got a regulatory hint tell core its
614 * free to listen now to a new shiny device regulatory hint */
615 reg_device_remove(wiphy);
617 cfg80211_rdev_list_generation++;
618 device_del(&rdev->wiphy.dev);
619 debugfs_remove(rdev->wiphy.debugfsdir);
621 mutex_unlock(&cfg80211_mutex);
623 flush_work(&rdev->scan_done_wk);
624 cancel_work_sync(&rdev->conn_work);
625 flush_work(&rdev->event_work);
627 EXPORT_SYMBOL(wiphy_unregister);
629 void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
631 struct cfg80211_internal_bss *scan, *tmp;
632 rfkill_destroy(rdev->rfkill);
633 mutex_destroy(&rdev->mtx);
634 mutex_destroy(&rdev->devlist_mtx);
635 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
636 cfg80211_put_bss(&scan->pub);
640 void wiphy_free(struct wiphy *wiphy)
642 put_device(&wiphy->dev);
644 EXPORT_SYMBOL(wiphy_free);
646 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
648 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
650 if (rfkill_set_hw_state(rdev->rfkill, blocked))
651 schedule_work(&rdev->rfkill_sync);
653 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
655 static void wdev_cleanup_work(struct work_struct *work)
657 struct wireless_dev *wdev;
658 struct cfg80211_registered_device *rdev;
660 wdev = container_of(work, struct wireless_dev, cleanup_work);
661 rdev = wiphy_to_dev(wdev->wiphy);
663 cfg80211_lock_rdev(rdev);
665 if (WARN_ON(rdev->scan_req && rdev->scan_req->dev == wdev->netdev)) {
666 rdev->scan_req->aborted = true;
667 ___cfg80211_scan_done(rdev);
670 cfg80211_unlock_rdev(rdev);
672 mutex_lock(&rdev->devlist_mtx);
674 mutex_unlock(&rdev->devlist_mtx);
675 wake_up(&rdev->dev_wait);
677 dev_put(wdev->netdev);
680 static int cfg80211_netdev_notifier_call(struct notifier_block * nb,
684 struct net_device *dev = ndev;
685 struct wireless_dev *wdev = dev->ieee80211_ptr;
686 struct cfg80211_registered_device *rdev;
691 rdev = wiphy_to_dev(wdev->wiphy);
693 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
696 case NETDEV_REGISTER:
698 * NB: cannot take rdev->mtx here because this may be
699 * called within code protected by it when interfaces
700 * are added with nl80211.
702 mutex_init(&wdev->mtx);
703 INIT_WORK(&wdev->cleanup_work, wdev_cleanup_work);
704 INIT_LIST_HEAD(&wdev->event_list);
705 spin_lock_init(&wdev->event_lock);
706 mutex_lock(&rdev->devlist_mtx);
707 list_add(&wdev->list, &rdev->netdev_list);
708 rdev->devlist_generation++;
709 /* can only change netns with wiphy */
710 dev->features |= NETIF_F_NETNS_LOCAL;
712 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
714 printk(KERN_ERR "wireless: failed to add phy80211 "
715 "symlink to netdev!\n");
718 wdev->sme_state = CFG80211_SME_IDLE;
719 mutex_unlock(&rdev->devlist_mtx);
720 #ifdef CONFIG_WIRELESS_EXT
721 if (!dev->wireless_handlers)
722 dev->wireless_handlers = &cfg80211_wext_handler;
723 wdev->wext.default_key = -1;
724 wdev->wext.default_mgmt_key = -1;
725 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
726 wdev->wext.ps = wdev->wiphy->ps_default;
727 wdev->wext.ps_timeout = 100;
728 if (rdev->ops->set_power_mgmt)
729 if (rdev->ops->set_power_mgmt(wdev->wiphy, dev,
731 wdev->wext.ps_timeout)) {
732 /* assume this means it's off */
733 wdev->wext.ps = false;
737 case NETDEV_GOING_DOWN:
738 switch (wdev->iftype) {
739 case NL80211_IFTYPE_ADHOC:
740 cfg80211_leave_ibss(rdev, dev, true);
742 case NL80211_IFTYPE_STATION:
744 #ifdef CONFIG_WIRELESS_EXT
745 kfree(wdev->wext.ie);
746 wdev->wext.ie = NULL;
747 wdev->wext.ie_len = 0;
748 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
750 __cfg80211_disconnect(rdev, dev,
751 WLAN_REASON_DEAUTH_LEAVING, true);
752 cfg80211_mlme_down(rdev, dev);
759 schedule_work(&wdev->cleanup_work);
763 * If we have a really quick DOWN/UP succession we may
764 * have this work still pending ... cancel it and see
765 * if it was pending, in which case we need to account
766 * for some of the work it would have done.
768 if (cancel_work_sync(&wdev->cleanup_work)) {
769 mutex_lock(&rdev->devlist_mtx);
771 mutex_unlock(&rdev->devlist_mtx);
774 #ifdef CONFIG_WIRELESS_EXT
775 cfg80211_lock_rdev(rdev);
776 mutex_lock(&rdev->devlist_mtx);
778 switch (wdev->iftype) {
779 case NL80211_IFTYPE_ADHOC:
780 cfg80211_ibss_wext_join(rdev, wdev);
782 case NL80211_IFTYPE_STATION:
783 cfg80211_mgd_wext_connect(rdev, wdev);
790 mutex_unlock(&rdev->devlist_mtx);
791 cfg80211_unlock_rdev(rdev);
794 case NETDEV_UNREGISTER:
796 * NB: cannot take rdev->mtx here because this may be
797 * called within code protected by it when interfaces
798 * are removed with nl80211.
800 mutex_lock(&rdev->devlist_mtx);
802 * It is possible to get NETDEV_UNREGISTER
803 * multiple times. To detect that, check
804 * that the interface is still on the list
805 * of registered interfaces, and only then
806 * remove and clean it up.
808 if (!list_empty(&wdev->list)) {
809 sysfs_remove_link(&dev->dev.kobj, "phy80211");
810 list_del_init(&wdev->list);
811 rdev->devlist_generation++;
812 #ifdef CONFIG_WIRELESS_EXT
813 kfree(wdev->wext.keys);
816 mutex_unlock(&rdev->devlist_mtx);
819 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
820 return notifier_from_errno(-EOPNOTSUPP);
821 if (rfkill_blocked(rdev->rfkill))
822 return notifier_from_errno(-ERFKILL);
829 static struct notifier_block cfg80211_netdev_notifier = {
830 .notifier_call = cfg80211_netdev_notifier_call,
833 static void __net_exit cfg80211_pernet_exit(struct net *net)
835 struct cfg80211_registered_device *rdev;
838 mutex_lock(&cfg80211_mutex);
839 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
840 if (net_eq(wiphy_net(&rdev->wiphy), net))
841 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
843 mutex_unlock(&cfg80211_mutex);
847 static struct pernet_operations cfg80211_pernet_ops = {
848 .exit = cfg80211_pernet_exit,
851 static int __init cfg80211_init(void)
855 err = register_pernet_device(&cfg80211_pernet_ops);
857 goto out_fail_pernet;
859 err = wiphy_sysfs_init();
863 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
865 goto out_fail_notifier;
867 err = nl80211_init();
869 goto out_fail_nl80211;
871 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
873 err = regulatory_init();
880 debugfs_remove(ieee80211_debugfs_dir);
882 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
886 unregister_pernet_device(&cfg80211_pernet_ops);
890 subsys_initcall(cfg80211_init);
892 static void cfg80211_exit(void)
894 debugfs_remove(ieee80211_debugfs_dir);
896 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
899 unregister_pernet_device(&cfg80211_pernet_ops);
901 module_exit(cfg80211_exit);