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"
31 /* name for sysfs, %d is appended */
32 #define PHY_NAME "phy"
34 MODULE_AUTHOR("Johannes Berg");
35 MODULE_LICENSE("GPL");
36 MODULE_DESCRIPTION("wireless configuration support");
37 MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME);
39 /* RCU-protected (and RTNL for writers) */
40 LIST_HEAD(cfg80211_rdev_list);
41 int cfg80211_rdev_list_generation;
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 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
56 struct cfg80211_registered_device *result = NULL, *rdev;
60 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
61 if (rdev->wiphy_idx == wiphy_idx) {
70 int get_wiphy_idx(struct wiphy *wiphy)
72 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
74 return rdev->wiphy_idx;
77 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
79 struct cfg80211_registered_device *rdev;
83 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
89 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
92 struct cfg80211_registered_device *rdev2;
93 int wiphy_idx, taken = -1, result, digits;
97 /* prohibit calling the thing phy%d when %d is not its number */
98 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
99 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
100 /* count number of places needed to print wiphy_idx */
102 while (wiphy_idx /= 10)
105 * deny the name if it is phy<idx> where <idx> is printed
106 * without leading zeroes. taken == strlen(newname) here
108 if (taken == strlen(PHY_NAME) + digits)
113 /* Ignore nop renames */
114 if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0)
117 /* Ensure another device does not already have this name. */
118 list_for_each_entry(rdev2, &cfg80211_rdev_list, list)
119 if (strcmp(newname, dev_name(&rdev2->wiphy.dev)) == 0)
122 result = device_rename(&rdev->wiphy.dev, newname);
126 if (rdev->wiphy.debugfsdir &&
127 !debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
128 rdev->wiphy.debugfsdir,
129 rdev->wiphy.debugfsdir->d_parent,
131 pr_err("failed to rename debugfs dir to %s!\n", newname);
133 nl80211_notify_dev_rename(rdev);
138 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
141 struct wireless_dev *wdev;
144 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK))
147 list_for_each_entry(wdev, &rdev->wdev_list, list) {
150 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
151 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
154 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
158 /* failed -- clean up to old netns */
159 net = wiphy_net(&rdev->wiphy);
161 list_for_each_entry_continue_reverse(wdev, &rdev->wdev_list,
165 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
166 err = dev_change_net_namespace(wdev->netdev, net,
169 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
175 wiphy_net_set(&rdev->wiphy, net);
177 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev));
183 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
185 struct cfg80211_registered_device *rdev = data;
187 rdev_rfkill_poll(rdev);
190 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
191 struct wireless_dev *wdev)
195 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE))
198 if (!wdev->p2p_started)
201 rdev_stop_p2p_device(rdev, wdev);
202 wdev->p2p_started = false;
206 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
208 * If the scan request wasn't notified as done, set it
209 * to aborted and leak it after a warning. The driver
210 * should have notified us that it ended at the latest
211 * during rdev_stop_p2p_device().
213 if (WARN_ON(!rdev->scan_req->notified))
214 rdev->scan_req->aborted = true;
215 ___cfg80211_scan_done(rdev, !rdev->scan_req->notified);
219 static int cfg80211_rfkill_set_block(void *data, bool blocked)
221 struct cfg80211_registered_device *rdev = data;
222 struct wireless_dev *wdev;
229 list_for_each_entry(wdev, &rdev->wdev_list, list) {
231 dev_close(wdev->netdev);
234 /* otherwise, check iftype */
235 switch (wdev->iftype) {
236 case NL80211_IFTYPE_P2P_DEVICE:
237 cfg80211_stop_p2p_device(rdev, wdev);
249 static void cfg80211_rfkill_sync_work(struct work_struct *work)
251 struct cfg80211_registered_device *rdev;
253 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync);
254 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
257 static void cfg80211_event_work(struct work_struct *work)
259 struct cfg80211_registered_device *rdev;
261 rdev = container_of(work, struct cfg80211_registered_device,
265 cfg80211_process_rdev_events(rdev);
269 /* exported functions */
271 struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
273 static atomic_t wiphy_counter = ATOMIC_INIT(0);
275 struct cfg80211_registered_device *rdev;
278 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
279 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
280 WARN_ON(ops->connect && !ops->disconnect);
281 WARN_ON(ops->join_ibss && !ops->leave_ibss);
282 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
283 WARN_ON(ops->add_station && !ops->del_station);
284 WARN_ON(ops->add_mpath && !ops->del_mpath);
285 WARN_ON(ops->join_mesh && !ops->leave_mesh);
287 alloc_size = sizeof(*rdev) + sizeof_priv;
289 rdev = kzalloc(alloc_size, GFP_KERNEL);
295 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter);
297 if (unlikely(rdev->wiphy_idx < 0)) {
299 atomic_dec(&wiphy_counter);
304 /* atomic_inc_return makes it start at 1, make it start at 0 */
307 /* give it a proper name */
308 dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
310 INIT_LIST_HEAD(&rdev->wdev_list);
311 INIT_LIST_HEAD(&rdev->beacon_registrations);
312 spin_lock_init(&rdev->beacon_registrations_lock);
313 spin_lock_init(&rdev->bss_lock);
314 INIT_LIST_HEAD(&rdev->bss_list);
315 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
316 INIT_WORK(&rdev->sched_scan_results_wk, __cfg80211_sched_scan_results);
317 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk,
318 cfg80211_dfs_channels_update_work);
319 #ifdef CONFIG_CFG80211_WEXT
320 rdev->wiphy.wext = &cfg80211_wext_handler;
323 device_initialize(&rdev->wiphy.dev);
324 rdev->wiphy.dev.class = &ieee80211_class;
325 rdev->wiphy.dev.platform_data = rdev;
327 #ifdef CONFIG_CFG80211_DEFAULT_PS
328 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
331 wiphy_net_set(&rdev->wiphy, &init_net);
333 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
334 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
335 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
336 &rdev->rfkill_ops, rdev);
343 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
344 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
345 INIT_WORK(&rdev->event_work, cfg80211_event_work);
347 init_waitqueue_head(&rdev->dev_wait);
350 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
351 * Fragmentation and RTS threshold are disabled by default with the
354 rdev->wiphy.retry_short = 7;
355 rdev->wiphy.retry_long = 4;
356 rdev->wiphy.frag_threshold = (u32) -1;
357 rdev->wiphy.rts_threshold = (u32) -1;
358 rdev->wiphy.coverage_class = 0;
360 rdev->wiphy.features = NL80211_FEATURE_SCAN_FLUSH;
364 EXPORT_SYMBOL(wiphy_new);
366 static int wiphy_verify_combinations(struct wiphy *wiphy)
368 const struct ieee80211_iface_combination *c;
371 for (i = 0; i < wiphy->n_iface_combinations; i++) {
375 c = &wiphy->iface_combinations[i];
378 * Combinations with just one interface aren't real,
379 * however we make an exception for DFS.
381 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths))
384 /* Need at least one channel */
385 if (WARN_ON(!c->num_different_channels))
389 * Put a sane limit on maximum number of different
390 * channels to simplify channel accounting code.
392 if (WARN_ON(c->num_different_channels >
393 CFG80211_MAX_NUM_DIFFERENT_CHANNELS))
396 /* DFS only works on one channel. */
397 if (WARN_ON(c->radar_detect_widths &&
398 (c->num_different_channels > 1)))
401 if (WARN_ON(!c->n_limits))
404 for (j = 0; j < c->n_limits; j++) {
405 u16 types = c->limits[j].types;
408 * interface types shouldn't overlap, this is
409 * used in cfg80211_can_change_interface()
411 if (WARN_ON(types & all_iftypes))
413 all_iftypes |= types;
415 if (WARN_ON(!c->limits[j].max))
418 /* Shouldn't list software iftypes in combinations! */
419 if (WARN_ON(wiphy->software_iftypes & types))
422 /* Only a single P2P_DEVICE can be allowed */
423 if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) &&
424 c->limits[j].max > 1))
427 cnt += c->limits[j].max;
429 * Don't advertise an unsupported type
432 if (WARN_ON((wiphy->interface_modes & types) != types))
436 /* You can't even choose that many! */
437 if (WARN_ON(cnt < c->max_interfaces))
444 int wiphy_register(struct wiphy *wiphy)
446 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
448 enum ieee80211_band band;
449 struct ieee80211_supported_band *sband;
450 bool have_band = false;
452 u16 ifmodes = wiphy->interface_modes;
455 if (WARN_ON(wiphy->wowlan &&
456 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
457 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
459 if (WARN_ON(wiphy->wowlan &&
460 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns &&
461 !wiphy->wowlan->tcp))
465 if (WARN_ON(wiphy->ap_sme_capa &&
466 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
469 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
472 if (WARN_ON(wiphy->addresses &&
473 !is_zero_ether_addr(wiphy->perm_addr) &&
474 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
478 if (WARN_ON(wiphy->max_acl_mac_addrs &&
479 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) ||
480 !rdev->ops->set_mac_acl)))
483 if (wiphy->addresses)
484 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
486 /* sanity check ifmodes */
488 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
489 if (WARN_ON(ifmodes != wiphy->interface_modes))
490 wiphy->interface_modes = ifmodes;
492 res = wiphy_verify_combinations(wiphy);
496 /* sanity check supported bands/channels */
497 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
498 sband = wiphy->bands[band];
503 if (WARN_ON(!sband->n_channels))
506 * on 60gHz band, there are no legacy rates, so
509 if (WARN_ON(band != IEEE80211_BAND_60GHZ &&
514 * Since cfg80211_disable_40mhz_24ghz is global, we can
515 * modify the sband's ht data even if the driver uses a
516 * global structure for that.
518 if (cfg80211_disable_40mhz_24ghz &&
519 band == IEEE80211_BAND_2GHZ &&
520 sband->ht_cap.ht_supported) {
521 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
522 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
526 * Since we use a u32 for rate bitmaps in
527 * ieee80211_get_response_rate, we cannot
528 * have more than 32 legacy rates.
530 if (WARN_ON(sband->n_bitrates > 32))
533 for (i = 0; i < sband->n_channels; i++) {
534 sband->channels[i].orig_flags =
535 sband->channels[i].flags;
536 sband->channels[i].orig_mag = INT_MAX;
537 sband->channels[i].orig_mpwr =
538 sband->channels[i].max_power;
539 sband->channels[i].band = band;
551 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns &&
552 (!rdev->wiphy.wowlan->pattern_min_len ||
553 rdev->wiphy.wowlan->pattern_min_len >
554 rdev->wiphy.wowlan->pattern_max_len)))
558 /* check and set up bitrates */
559 ieee80211_set_bitrate_flags(wiphy);
562 res = device_add(&rdev->wiphy.dev);
566 res = rfkill_register(rdev->rfkill);
568 device_del(&rdev->wiphy.dev);
573 /* set up regulatory info */
574 wiphy_regulatory_register(wiphy);
576 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
577 cfg80211_rdev_list_generation++;
580 rdev->wiphy.debugfsdir =
581 debugfs_create_dir(wiphy_name(&rdev->wiphy),
582 ieee80211_debugfs_dir);
583 if (IS_ERR(rdev->wiphy.debugfsdir))
584 rdev->wiphy.debugfsdir = NULL;
586 if (wiphy->flags & WIPHY_FLAG_CUSTOM_REGULATORY) {
587 struct regulatory_request request;
589 request.wiphy_idx = get_wiphy_idx(wiphy);
590 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
591 request.alpha2[0] = '9';
592 request.alpha2[1] = '9';
594 nl80211_send_reg_change_event(&request);
597 cfg80211_debugfs_rdev_add(rdev);
599 rdev->wiphy.registered = true;
603 EXPORT_SYMBOL(wiphy_register);
605 void wiphy_rfkill_start_polling(struct wiphy *wiphy)
607 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
609 if (!rdev->ops->rfkill_poll)
611 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
612 rfkill_resume_polling(rdev->rfkill);
614 EXPORT_SYMBOL(wiphy_rfkill_start_polling);
616 void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
618 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
620 rfkill_pause_polling(rdev->rfkill);
622 EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
624 void wiphy_unregister(struct wiphy *wiphy)
626 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
628 wait_event(rdev->dev_wait, ({
631 __count = rdev->opencount;
635 rfkill_unregister(rdev->rfkill);
638 rdev->wiphy.registered = false;
640 BUG_ON(!list_empty(&rdev->wdev_list));
643 * First remove the hardware from everywhere, this makes
644 * it impossible to find from userspace.
646 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
647 list_del_rcu(&rdev->list);
651 * If this device got a regulatory hint tell core its
652 * free to listen now to a new shiny device regulatory hint
654 wiphy_regulatory_deregister(wiphy);
656 cfg80211_rdev_list_generation++;
657 device_del(&rdev->wiphy.dev);
661 flush_work(&rdev->scan_done_wk);
662 cancel_work_sync(&rdev->conn_work);
663 flush_work(&rdev->event_work);
664 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
667 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
668 rdev_set_wakeup(rdev, false);
670 cfg80211_rdev_free_wowlan(rdev);
672 EXPORT_SYMBOL(wiphy_unregister);
674 void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
676 struct cfg80211_internal_bss *scan, *tmp;
677 struct cfg80211_beacon_registration *reg, *treg;
678 rfkill_destroy(rdev->rfkill);
679 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
680 list_del(®->list);
683 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
684 cfg80211_put_bss(&rdev->wiphy, &scan->pub);
688 void wiphy_free(struct wiphy *wiphy)
690 put_device(&wiphy->dev);
692 EXPORT_SYMBOL(wiphy_free);
694 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
696 struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
698 if (rfkill_set_hw_state(rdev->rfkill, blocked))
699 schedule_work(&rdev->rfkill_sync);
701 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
703 void cfg80211_unregister_wdev(struct wireless_dev *wdev)
705 struct cfg80211_registered_device *rdev = wiphy_to_dev(wdev->wiphy);
709 if (WARN_ON(wdev->netdev))
712 list_del_rcu(&wdev->list);
713 rdev->devlist_generation++;
715 switch (wdev->iftype) {
716 case NL80211_IFTYPE_P2P_DEVICE:
717 cfg80211_stop_p2p_device(rdev, wdev);
724 EXPORT_SYMBOL(cfg80211_unregister_wdev);
726 static struct device_type wiphy_type = {
730 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
731 enum nl80211_iftype iftype, int num)
735 rdev->num_running_ifaces += num;
736 if (iftype == NL80211_IFTYPE_MONITOR)
737 rdev->num_running_monitor_ifaces += num;
740 void cfg80211_leave(struct cfg80211_registered_device *rdev,
741 struct wireless_dev *wdev)
743 struct net_device *dev = wdev->netdev;
745 switch (wdev->iftype) {
746 case NL80211_IFTYPE_ADHOC:
747 cfg80211_leave_ibss(rdev, dev, true);
749 case NL80211_IFTYPE_P2P_CLIENT:
750 case NL80211_IFTYPE_STATION:
751 __cfg80211_stop_sched_scan(rdev, false);
754 #ifdef CONFIG_CFG80211_WEXT
755 kfree(wdev->wext.ie);
756 wdev->wext.ie = NULL;
757 wdev->wext.ie_len = 0;
758 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
760 cfg80211_disconnect(rdev, dev,
761 WLAN_REASON_DEAUTH_LEAVING, true);
764 case NL80211_IFTYPE_MESH_POINT:
765 cfg80211_leave_mesh(rdev, dev);
767 case NL80211_IFTYPE_AP:
768 cfg80211_stop_ap(rdev, dev);
774 wdev->beacon_interval = 0;
777 static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
778 unsigned long state, void *ptr)
780 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
781 struct wireless_dev *wdev = dev->ieee80211_ptr;
782 struct cfg80211_registered_device *rdev;
788 rdev = wiphy_to_dev(wdev->wiphy);
790 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
793 case NETDEV_POST_INIT:
794 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
796 case NETDEV_REGISTER:
798 * NB: cannot take rdev->mtx here because this may be
799 * called within code protected by it when interfaces
800 * are added with nl80211.
802 mutex_init(&wdev->mtx);
803 INIT_LIST_HEAD(&wdev->event_list);
804 spin_lock_init(&wdev->event_lock);
805 INIT_LIST_HEAD(&wdev->mgmt_registrations);
806 spin_lock_init(&wdev->mgmt_registrations_lock);
808 wdev->identifier = ++rdev->wdev_id;
809 list_add_rcu(&wdev->list, &rdev->wdev_list);
810 rdev->devlist_generation++;
811 /* can only change netns with wiphy */
812 dev->features |= NETIF_F_NETNS_LOCAL;
814 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
816 pr_err("failed to add phy80211 symlink to netdev!\n");
819 #ifdef CONFIG_CFG80211_WEXT
820 wdev->wext.default_key = -1;
821 wdev->wext.default_mgmt_key = -1;
822 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
825 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
829 /* allow mac80211 to determine the timeout */
830 wdev->ps_timeout = -1;
832 netdev_set_default_ethtool_ops(dev, &cfg80211_ethtool_ops);
834 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
835 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
836 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
837 dev->priv_flags |= IFF_DONT_BRIDGE;
839 case NETDEV_GOING_DOWN:
840 cfg80211_leave(rdev, wdev);
843 cfg80211_update_iface_num(rdev, wdev->iftype, -1);
844 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
845 if (WARN_ON(!rdev->scan_req->notified))
846 rdev->scan_req->aborted = true;
847 ___cfg80211_scan_done(rdev, true);
850 if (WARN_ON(rdev->sched_scan_req &&
851 rdev->sched_scan_req->dev == wdev->netdev)) {
852 __cfg80211_stop_sched_scan(rdev, false);
856 wake_up(&rdev->dev_wait);
859 cfg80211_update_iface_num(rdev, wdev->iftype, 1);
861 switch (wdev->iftype) {
862 #ifdef CONFIG_CFG80211_WEXT
863 case NL80211_IFTYPE_ADHOC:
864 cfg80211_ibss_wext_join(rdev, wdev);
866 case NL80211_IFTYPE_STATION:
867 cfg80211_mgd_wext_connect(rdev, wdev);
870 #ifdef CONFIG_MAC80211_MESH
871 case NL80211_IFTYPE_MESH_POINT:
873 /* backward compat code... */
874 struct mesh_setup setup;
875 memcpy(&setup, &default_mesh_setup,
877 /* back compat only needed for mesh_id */
878 setup.mesh_id = wdev->ssid;
879 setup.mesh_id_len = wdev->mesh_id_up_len;
880 if (wdev->mesh_id_up_len)
881 __cfg80211_join_mesh(rdev, dev,
883 &default_mesh_config);
894 * Configure power management to the driver here so that its
895 * correctly set also after interface type changes etc.
897 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
898 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
899 rdev->ops->set_power_mgmt)
900 if (rdev_set_power_mgmt(rdev, dev, wdev->ps,
902 /* assume this means it's off */
906 case NETDEV_UNREGISTER:
908 * It is possible to get NETDEV_UNREGISTER
909 * multiple times. To detect that, check
910 * that the interface is still on the list
911 * of registered interfaces, and only then
912 * remove and clean it up.
914 if (!list_empty(&wdev->list)) {
915 sysfs_remove_link(&dev->dev.kobj, "phy80211");
916 list_del_rcu(&wdev->list);
917 rdev->devlist_generation++;
918 cfg80211_mlme_purge_registrations(wdev);
919 #ifdef CONFIG_CFG80211_WEXT
920 kfree(wdev->wext.keys);
924 * synchronise (so that we won't find this netdev
925 * from other code any more) and then clear the list
926 * head so that the above code can safely check for
927 * !list_empty() to avoid double-cleanup.
930 INIT_LIST_HEAD(&wdev->list);
932 * Ensure that all events have been processed and
935 cfg80211_process_wdev_events(wdev);
937 if (WARN_ON(wdev->current_bss)) {
938 cfg80211_unhold_bss(wdev->current_bss);
939 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
940 wdev->current_bss = NULL;
944 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
945 return notifier_from_errno(-EOPNOTSUPP);
946 if (rfkill_blocked(rdev->rfkill))
947 return notifier_from_errno(-ERFKILL);
948 ret = cfg80211_can_add_interface(rdev, wdev->iftype);
950 return notifier_from_errno(ret);
957 static struct notifier_block cfg80211_netdev_notifier = {
958 .notifier_call = cfg80211_netdev_notifier_call,
961 static void __net_exit cfg80211_pernet_exit(struct net *net)
963 struct cfg80211_registered_device *rdev;
966 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
967 if (net_eq(wiphy_net(&rdev->wiphy), net))
968 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
973 static struct pernet_operations cfg80211_pernet_ops = {
974 .exit = cfg80211_pernet_exit,
977 static int __init cfg80211_init(void)
981 err = register_pernet_device(&cfg80211_pernet_ops);
983 goto out_fail_pernet;
985 err = wiphy_sysfs_init();
989 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
991 goto out_fail_notifier;
993 err = nl80211_init();
995 goto out_fail_nl80211;
997 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
999 err = regulatory_init();
1003 cfg80211_wq = create_singlethread_workqueue("cfg80211");
1014 debugfs_remove(ieee80211_debugfs_dir);
1016 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1020 unregister_pernet_device(&cfg80211_pernet_ops);
1024 subsys_initcall(cfg80211_init);
1026 static void __exit cfg80211_exit(void)
1028 debugfs_remove(ieee80211_debugfs_dir);
1030 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1033 unregister_pernet_device(&cfg80211_pernet_ops);
1034 destroy_workqueue(cfg80211_wq);
1036 module_exit(cfg80211_exit);