2 * This is the linux wireless configuration interface.
4 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
7 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
10 #include <linux/module.h>
11 #include <linux/err.h>
12 #include <linux/list.h>
13 #include <linux/slab.h>
14 #include <linux/nl80211.h>
15 #include <linux/debugfs.h>
16 #include <linux/notifier.h>
17 #include <linux/device.h>
18 #include <linux/etherdevice.h>
19 #include <linux/rtnetlink.h>
20 #include <linux/sched.h>
21 #include <net/genetlink.h>
22 #include <net/cfg80211.h>
27 #include "wext-compat.h"
30 /* name for sysfs, %d is appended */
31 #define PHY_NAME "phy"
33 MODULE_AUTHOR("Johannes Berg");
34 MODULE_LICENSE("GPL");
35 MODULE_DESCRIPTION("wireless configuration support");
37 /* RCU-protected (and cfg80211_mutex for writers) */
38 LIST_HEAD(cfg80211_rdev_list);
39 int cfg80211_rdev_list_generation;
41 DEFINE_MUTEX(cfg80211_mutex);
44 static struct dentry *ieee80211_debugfs_dir;
46 /* for the cleanup, scan and event works */
47 struct workqueue_struct *cfg80211_wq;
49 static bool cfg80211_disable_40mhz_24ghz;
50 module_param(cfg80211_disable_40mhz_24ghz, bool, 0644);
51 MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz,
52 "Disable 40MHz support in the 2.4GHz band");
54 /* requires cfg80211_mutex to be held! */
55 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
57 struct cfg80211_registered_device *result = NULL, *rdev;
59 if (!wiphy_idx_valid(wiphy_idx))
62 assert_cfg80211_lock();
64 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
65 if (rdev->wiphy_idx == wiphy_idx) {
74 int get_wiphy_idx(struct wiphy *wiphy)
76 struct cfg80211_registered_device *rdev;
78 return WIPHY_IDX_STALE;
79 rdev = wiphy_to_dev(wiphy);
80 return rdev->wiphy_idx;
83 /* requires cfg80211_rdev_mutex to be held! */
84 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
86 struct cfg80211_registered_device *rdev;
88 if (!wiphy_idx_valid(wiphy_idx))
91 assert_cfg80211_lock();
93 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
99 struct cfg80211_registered_device *
100 cfg80211_get_dev_from_ifindex(struct net *net, int ifindex)
102 struct cfg80211_registered_device *rdev = ERR_PTR(-ENODEV);
103 struct net_device *dev;
105 mutex_lock(&cfg80211_mutex);
106 dev = dev_get_by_index(net, ifindex);
109 if (dev->ieee80211_ptr) {
110 rdev = wiphy_to_dev(dev->ieee80211_ptr->wiphy);
111 mutex_lock(&rdev->mtx);
113 rdev = ERR_PTR(-ENODEV);
116 mutex_unlock(&cfg80211_mutex);
120 /* requires cfg80211_mutex to be held */
121 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
124 struct cfg80211_registered_device *rdev2;
125 int wiphy_idx, taken = -1, result, digits;
127 assert_cfg80211_lock();
129 /* prohibit calling the thing phy%d when %d is not its number */
130 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
131 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
132 /* count number of places needed to print wiphy_idx */
134 while (wiphy_idx /= 10)
137 * deny the name if it is phy<idx> where <idx> is printed
138 * without leading zeroes. taken == strlen(newname) here
140 if (taken == strlen(PHY_NAME) + digits)
145 /* Ignore nop renames */
146 if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0)
149 /* Ensure another device does not already have this name. */
150 list_for_each_entry(rdev2, &cfg80211_rdev_list, list)
151 if (strcmp(newname, dev_name(&rdev2->wiphy.dev)) == 0)
154 result = device_rename(&rdev->wiphy.dev, newname);
158 if (rdev->wiphy.debugfsdir &&
159 !debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
160 rdev->wiphy.debugfsdir,
161 rdev->wiphy.debugfsdir->d_parent,
163 pr_err("failed to rename debugfs dir to %s!\n", newname);
165 nl80211_notify_dev_rename(rdev);
170 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
173 struct wireless_dev *wdev;
176 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK))
179 list_for_each_entry(wdev, &rdev->netdev_list, list) {
180 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
181 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
184 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
188 /* failed -- clean up to old netns */
189 net = wiphy_net(&rdev->wiphy);
191 list_for_each_entry_continue_reverse(wdev, &rdev->netdev_list,
193 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
194 err = dev_change_net_namespace(wdev->netdev, net,
197 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
203 wiphy_net_set(&rdev->wiphy, net);
205 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev));
211 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
213 struct cfg80211_registered_device *rdev = data;
215 rdev->ops->rfkill_poll(&rdev->wiphy);
218 static int cfg80211_rfkill_set_block(void *data, bool blocked)
220 struct cfg80211_registered_device *rdev = data;
221 struct wireless_dev *wdev;
227 mutex_lock(&rdev->devlist_mtx);
229 list_for_each_entry(wdev, &rdev->netdev_list, list)
230 dev_close(wdev->netdev);
232 mutex_unlock(&rdev->devlist_mtx);
238 static void cfg80211_rfkill_sync_work(struct work_struct *work)
240 struct cfg80211_registered_device *rdev;
242 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync);
243 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
246 static void cfg80211_event_work(struct work_struct *work)
248 struct cfg80211_registered_device *rdev;
250 rdev = container_of(work, struct cfg80211_registered_device,
254 cfg80211_lock_rdev(rdev);
256 cfg80211_process_rdev_events(rdev);
257 cfg80211_unlock_rdev(rdev);
261 /* exported functions */
263 struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
265 static int wiphy_counter;
267 struct cfg80211_registered_device *rdev;
270 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
271 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
272 WARN_ON(ops->connect && !ops->disconnect);
273 WARN_ON(ops->join_ibss && !ops->leave_ibss);
274 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
275 WARN_ON(ops->add_station && !ops->del_station);
276 WARN_ON(ops->add_mpath && !ops->del_mpath);
277 WARN_ON(ops->join_mesh && !ops->leave_mesh);
279 alloc_size = sizeof(*rdev) + sizeof_priv;
281 rdev = kzalloc(alloc_size, GFP_KERNEL);
287 mutex_lock(&cfg80211_mutex);
289 rdev->wiphy_idx = wiphy_counter++;
291 if (unlikely(!wiphy_idx_valid(rdev->wiphy_idx))) {
293 mutex_unlock(&cfg80211_mutex);
299 mutex_unlock(&cfg80211_mutex);
301 /* give it a proper name */
302 dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
304 mutex_init(&rdev->mtx);
305 mutex_init(&rdev->devlist_mtx);
306 mutex_init(&rdev->sched_scan_mtx);
307 INIT_LIST_HEAD(&rdev->netdev_list);
308 spin_lock_init(&rdev->bss_lock);
309 INIT_LIST_HEAD(&rdev->bss_list);
310 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
311 INIT_WORK(&rdev->sched_scan_results_wk, __cfg80211_sched_scan_results);
312 #ifdef CONFIG_CFG80211_WEXT
313 rdev->wiphy.wext = &cfg80211_wext_handler;
316 device_initialize(&rdev->wiphy.dev);
317 rdev->wiphy.dev.class = &ieee80211_class;
318 rdev->wiphy.dev.platform_data = rdev;
320 #ifdef CONFIG_CFG80211_DEFAULT_PS
321 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
324 wiphy_net_set(&rdev->wiphy, &init_net);
326 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
327 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
328 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
329 &rdev->rfkill_ops, rdev);
336 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
337 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
338 INIT_WORK(&rdev->event_work, cfg80211_event_work);
340 init_waitqueue_head(&rdev->dev_wait);
343 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
344 * Fragmentation and RTS threshold are disabled by default with the
347 rdev->wiphy.retry_short = 7;
348 rdev->wiphy.retry_long = 4;
349 rdev->wiphy.frag_threshold = (u32) -1;
350 rdev->wiphy.rts_threshold = (u32) -1;
351 rdev->wiphy.coverage_class = 0;
355 EXPORT_SYMBOL(wiphy_new);
357 static int wiphy_verify_combinations(struct wiphy *wiphy)
359 const struct ieee80211_iface_combination *c;
362 for (i = 0; i < wiphy->n_iface_combinations; i++) {
366 c = &wiphy->iface_combinations[i];
368 /* Combinations with just one interface aren't real */
369 if (WARN_ON(c->max_interfaces < 2))
372 /* Need at least one channel */
373 if (WARN_ON(!c->num_different_channels))
376 if (WARN_ON(!c->n_limits))
379 for (j = 0; j < c->n_limits; j++) {
380 u16 types = c->limits[j].types;
383 * interface types shouldn't overlap, this is
384 * used in cfg80211_can_change_interface()
386 if (WARN_ON(types & all_iftypes))
388 all_iftypes |= types;
390 if (WARN_ON(!c->limits[j].max))
393 /* Shouldn't list software iftypes in combinations! */
394 if (WARN_ON(wiphy->software_iftypes & types))
397 cnt += c->limits[j].max;
399 * Don't advertise an unsupported type
402 if (WARN_ON((wiphy->interface_modes & types) != types))
406 /* You can't even choose that many! */
407 if (WARN_ON(cnt < c->max_interfaces))
414 int wiphy_register(struct wiphy *wiphy)
416 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
418 enum ieee80211_band band;
419 struct ieee80211_supported_band *sband;
420 bool have_band = false;
422 u16 ifmodes = wiphy->interface_modes;
424 if (WARN_ON((wiphy->wowlan.flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
425 !(wiphy->wowlan.flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
428 if (WARN_ON(wiphy->ap_sme_capa &&
429 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
432 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
435 if (WARN_ON(wiphy->addresses &&
436 !is_zero_ether_addr(wiphy->perm_addr) &&
437 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
441 if (wiphy->addresses)
442 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
444 /* sanity check ifmodes */
446 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
447 if (WARN_ON(ifmodes != wiphy->interface_modes))
448 wiphy->interface_modes = ifmodes;
450 res = wiphy_verify_combinations(wiphy);
454 /* sanity check supported bands/channels */
455 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
456 sband = wiphy->bands[band];
462 if (WARN_ON(!sband->n_channels || !sband->n_bitrates))
466 * Since cfg80211_disable_40mhz_24ghz is global, we can
467 * modify the sband's ht data even if the driver uses a
468 * global structure for that.
470 if (cfg80211_disable_40mhz_24ghz &&
471 band == IEEE80211_BAND_2GHZ &&
472 sband->ht_cap.ht_supported) {
473 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
474 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
478 * Since we use a u32 for rate bitmaps in
479 * ieee80211_get_response_rate, we cannot
480 * have more than 32 legacy rates.
482 if (WARN_ON(sband->n_bitrates > 32))
485 for (i = 0; i < sband->n_channels; i++) {
486 sband->channels[i].orig_flags =
487 sband->channels[i].flags;
488 sband->channels[i].orig_mag =
489 sband->channels[i].max_antenna_gain;
490 sband->channels[i].orig_mpwr =
491 sband->channels[i].max_power;
492 sband->channels[i].band = band;
503 if (rdev->wiphy.wowlan.n_patterns) {
504 if (WARN_ON(!rdev->wiphy.wowlan.pattern_min_len ||
505 rdev->wiphy.wowlan.pattern_min_len >
506 rdev->wiphy.wowlan.pattern_max_len))
510 /* check and set up bitrates */
511 ieee80211_set_bitrate_flags(wiphy);
513 mutex_lock(&cfg80211_mutex);
515 res = device_add(&rdev->wiphy.dev);
517 mutex_unlock(&cfg80211_mutex);
521 /* set up regulatory info */
522 regulatory_update(wiphy, NL80211_REGDOM_SET_BY_CORE);
524 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
525 cfg80211_rdev_list_generation++;
528 rdev->wiphy.debugfsdir =
529 debugfs_create_dir(wiphy_name(&rdev->wiphy),
530 ieee80211_debugfs_dir);
531 if (IS_ERR(rdev->wiphy.debugfsdir))
532 rdev->wiphy.debugfsdir = NULL;
534 if (wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) {
535 struct regulatory_request request;
537 request.wiphy_idx = get_wiphy_idx(wiphy);
538 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
539 request.alpha2[0] = '9';
540 request.alpha2[1] = '9';
542 nl80211_send_reg_change_event(&request);
545 cfg80211_debugfs_rdev_add(rdev);
546 mutex_unlock(&cfg80211_mutex);
549 * due to a locking dependency this has to be outside of the
550 * cfg80211_mutex lock
552 res = rfkill_register(rdev->rfkill);
557 rdev->wiphy.registered = true;
562 device_del(&rdev->wiphy.dev);
565 EXPORT_SYMBOL(wiphy_register);
567 void wiphy_rfkill_start_polling(struct wiphy *wiphy)
569 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
571 if (!rdev->ops->rfkill_poll)
573 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
574 rfkill_resume_polling(rdev->rfkill);
576 EXPORT_SYMBOL(wiphy_rfkill_start_polling);
578 void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
580 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
582 rfkill_pause_polling(rdev->rfkill);
584 EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
586 void wiphy_unregister(struct wiphy *wiphy)
588 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
591 rdev->wiphy.registered = false;
594 rfkill_unregister(rdev->rfkill);
596 /* protect the device list */
597 mutex_lock(&cfg80211_mutex);
599 wait_event(rdev->dev_wait, ({
601 mutex_lock(&rdev->devlist_mtx);
602 __count = rdev->opencount;
603 mutex_unlock(&rdev->devlist_mtx);
606 mutex_lock(&rdev->devlist_mtx);
607 BUG_ON(!list_empty(&rdev->netdev_list));
608 mutex_unlock(&rdev->devlist_mtx);
611 * First remove the hardware from everywhere, this makes
612 * it impossible to find from userspace.
614 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
615 list_del_rcu(&rdev->list);
619 * Try to grab rdev->mtx. If a command is still in progress,
620 * hopefully the driver will refuse it since it's tearing
621 * down the device already. We wait for this command to complete
622 * before unlinking the item from the list.
623 * Note: as codified by the BUG_ON above we cannot get here if
624 * a virtual interface is still present. Hence, we can only get
625 * to lock contention here if userspace issues a command that
626 * identified the hardware by wiphy index.
628 cfg80211_lock_rdev(rdev);
630 cfg80211_unlock_rdev(rdev);
632 /* If this device got a regulatory hint tell core its
633 * free to listen now to a new shiny device regulatory hint */
634 reg_device_remove(wiphy);
636 cfg80211_rdev_list_generation++;
637 device_del(&rdev->wiphy.dev);
639 mutex_unlock(&cfg80211_mutex);
641 flush_work(&rdev->scan_done_wk);
642 cancel_work_sync(&rdev->conn_work);
643 flush_work(&rdev->event_work);
645 if (rdev->wowlan && rdev->ops->set_wakeup)
646 rdev->ops->set_wakeup(&rdev->wiphy, false);
647 cfg80211_rdev_free_wowlan(rdev);
649 EXPORT_SYMBOL(wiphy_unregister);
651 void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
653 struct cfg80211_internal_bss *scan, *tmp;
654 rfkill_destroy(rdev->rfkill);
655 mutex_destroy(&rdev->mtx);
656 mutex_destroy(&rdev->devlist_mtx);
657 mutex_destroy(&rdev->sched_scan_mtx);
658 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
659 cfg80211_put_bss(&scan->pub);
663 void wiphy_free(struct wiphy *wiphy)
665 put_device(&wiphy->dev);
667 EXPORT_SYMBOL(wiphy_free);
669 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
671 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
673 if (rfkill_set_hw_state(rdev->rfkill, blocked))
674 schedule_work(&rdev->rfkill_sync);
676 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
678 static void wdev_cleanup_work(struct work_struct *work)
680 struct wireless_dev *wdev;
681 struct cfg80211_registered_device *rdev;
683 wdev = container_of(work, struct wireless_dev, cleanup_work);
684 rdev = wiphy_to_dev(wdev->wiphy);
686 cfg80211_lock_rdev(rdev);
688 if (WARN_ON(rdev->scan_req && rdev->scan_req->dev == wdev->netdev)) {
689 rdev->scan_req->aborted = true;
690 ___cfg80211_scan_done(rdev, true);
693 cfg80211_unlock_rdev(rdev);
695 mutex_lock(&rdev->sched_scan_mtx);
697 if (WARN_ON(rdev->sched_scan_req &&
698 rdev->sched_scan_req->dev == wdev->netdev)) {
699 __cfg80211_stop_sched_scan(rdev, false);
702 mutex_unlock(&rdev->sched_scan_mtx);
704 mutex_lock(&rdev->devlist_mtx);
706 mutex_unlock(&rdev->devlist_mtx);
707 wake_up(&rdev->dev_wait);
709 dev_put(wdev->netdev);
712 static struct device_type wiphy_type = {
716 static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
720 struct net_device *dev = ndev;
721 struct wireless_dev *wdev = dev->ieee80211_ptr;
722 struct cfg80211_registered_device *rdev;
728 rdev = wiphy_to_dev(wdev->wiphy);
730 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
733 case NETDEV_POST_INIT:
734 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
736 case NETDEV_REGISTER:
738 * NB: cannot take rdev->mtx here because this may be
739 * called within code protected by it when interfaces
740 * are added with nl80211.
742 mutex_init(&wdev->mtx);
743 INIT_WORK(&wdev->cleanup_work, wdev_cleanup_work);
744 INIT_LIST_HEAD(&wdev->event_list);
745 spin_lock_init(&wdev->event_lock);
746 INIT_LIST_HEAD(&wdev->mgmt_registrations);
747 spin_lock_init(&wdev->mgmt_registrations_lock);
749 mutex_lock(&rdev->devlist_mtx);
750 list_add_rcu(&wdev->list, &rdev->netdev_list);
751 rdev->devlist_generation++;
752 /* can only change netns with wiphy */
753 dev->features |= NETIF_F_NETNS_LOCAL;
755 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
757 pr_err("failed to add phy80211 symlink to netdev!\n");
760 wdev->sme_state = CFG80211_SME_IDLE;
761 mutex_unlock(&rdev->devlist_mtx);
762 #ifdef CONFIG_CFG80211_WEXT
763 wdev->wext.default_key = -1;
764 wdev->wext.default_mgmt_key = -1;
765 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
768 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
772 /* allow mac80211 to determine the timeout */
773 wdev->ps_timeout = -1;
775 if (!dev->ethtool_ops)
776 dev->ethtool_ops = &cfg80211_ethtool_ops;
778 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
779 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
780 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
781 dev->priv_flags |= IFF_DONT_BRIDGE;
783 case NETDEV_GOING_DOWN:
784 switch (wdev->iftype) {
785 case NL80211_IFTYPE_ADHOC:
786 cfg80211_leave_ibss(rdev, dev, true);
788 case NL80211_IFTYPE_P2P_CLIENT:
789 case NL80211_IFTYPE_STATION:
790 mutex_lock(&rdev->sched_scan_mtx);
791 __cfg80211_stop_sched_scan(rdev, false);
792 mutex_unlock(&rdev->sched_scan_mtx);
795 #ifdef CONFIG_CFG80211_WEXT
796 kfree(wdev->wext.ie);
797 wdev->wext.ie = NULL;
798 wdev->wext.ie_len = 0;
799 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
801 __cfg80211_disconnect(rdev, dev,
802 WLAN_REASON_DEAUTH_LEAVING, true);
803 cfg80211_mlme_down(rdev, dev);
806 case NL80211_IFTYPE_MESH_POINT:
807 cfg80211_leave_mesh(rdev, dev);
812 wdev->beacon_interval = 0;
816 queue_work(cfg80211_wq, &wdev->cleanup_work);
820 * If we have a really quick DOWN/UP succession we may
821 * have this work still pending ... cancel it and see
822 * if it was pending, in which case we need to account
823 * for some of the work it would have done.
825 if (cancel_work_sync(&wdev->cleanup_work)) {
826 mutex_lock(&rdev->devlist_mtx);
828 mutex_unlock(&rdev->devlist_mtx);
831 cfg80211_lock_rdev(rdev);
832 mutex_lock(&rdev->devlist_mtx);
834 switch (wdev->iftype) {
835 #ifdef CONFIG_CFG80211_WEXT
836 case NL80211_IFTYPE_ADHOC:
837 cfg80211_ibss_wext_join(rdev, wdev);
839 case NL80211_IFTYPE_STATION:
840 cfg80211_mgd_wext_connect(rdev, wdev);
843 #ifdef CONFIG_MAC80211_MESH
844 case NL80211_IFTYPE_MESH_POINT:
846 /* backward compat code... */
847 struct mesh_setup setup;
848 memcpy(&setup, &default_mesh_setup,
850 /* back compat only needed for mesh_id */
851 setup.mesh_id = wdev->ssid;
852 setup.mesh_id_len = wdev->mesh_id_up_len;
853 if (wdev->mesh_id_up_len)
854 __cfg80211_join_mesh(rdev, dev,
856 &default_mesh_config);
865 mutex_unlock(&rdev->devlist_mtx);
866 cfg80211_unlock_rdev(rdev);
869 * Configure power management to the driver here so that its
870 * correctly set also after interface type changes etc.
872 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
873 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
874 rdev->ops->set_power_mgmt)
875 if (rdev->ops->set_power_mgmt(wdev->wiphy, dev,
878 /* assume this means it's off */
882 case NETDEV_UNREGISTER:
884 * NB: cannot take rdev->mtx here because this may be
885 * called within code protected by it when interfaces
886 * are removed with nl80211.
888 mutex_lock(&rdev->devlist_mtx);
890 * It is possible to get NETDEV_UNREGISTER
891 * multiple times. To detect that, check
892 * that the interface is still on the list
893 * of registered interfaces, and only then
894 * remove and clean it up.
896 if (!list_empty(&wdev->list)) {
897 sysfs_remove_link(&dev->dev.kobj, "phy80211");
898 list_del_rcu(&wdev->list);
899 rdev->devlist_generation++;
900 cfg80211_mlme_purge_registrations(wdev);
901 #ifdef CONFIG_CFG80211_WEXT
902 kfree(wdev->wext.keys);
905 mutex_unlock(&rdev->devlist_mtx);
907 * synchronise (so that we won't find this netdev
908 * from other code any more) and then clear the list
909 * head so that the above code can safely check for
910 * !list_empty() to avoid double-cleanup.
913 INIT_LIST_HEAD(&wdev->list);
916 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
917 return notifier_from_errno(-EOPNOTSUPP);
918 if (rfkill_blocked(rdev->rfkill))
919 return notifier_from_errno(-ERFKILL);
920 ret = cfg80211_can_add_interface(rdev, wdev->iftype);
922 return notifier_from_errno(ret);
929 static struct notifier_block cfg80211_netdev_notifier = {
930 .notifier_call = cfg80211_netdev_notifier_call,
933 static void __net_exit cfg80211_pernet_exit(struct net *net)
935 struct cfg80211_registered_device *rdev;
938 mutex_lock(&cfg80211_mutex);
939 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
940 if (net_eq(wiphy_net(&rdev->wiphy), net))
941 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
943 mutex_unlock(&cfg80211_mutex);
947 static struct pernet_operations cfg80211_pernet_ops = {
948 .exit = cfg80211_pernet_exit,
951 static int __init cfg80211_init(void)
955 err = register_pernet_device(&cfg80211_pernet_ops);
957 goto out_fail_pernet;
959 err = wiphy_sysfs_init();
963 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
965 goto out_fail_notifier;
967 err = nl80211_init();
969 goto out_fail_nl80211;
971 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
973 err = regulatory_init();
977 cfg80211_wq = create_singlethread_workqueue("cfg80211");
986 debugfs_remove(ieee80211_debugfs_dir);
988 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
992 unregister_pernet_device(&cfg80211_pernet_ops);
996 subsys_initcall(cfg80211_init);
998 static void __exit cfg80211_exit(void)
1000 debugfs_remove(ieee80211_debugfs_dir);
1002 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1005 unregister_pernet_device(&cfg80211_pernet_ops);
1006 destroy_workqueue(cfg80211_wq);
1008 module_exit(cfg80211_exit);