1 // SPDX-License-Identifier: GPL-2.0-only
3 * This is the linux wireless configuration interface.
5 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
7 * Copyright 2015-2017 Intel Deutschland GmbH
8 * Copyright (C) 2018-2020 Intel Corporation
11 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
14 #include <linux/module.h>
15 #include <linux/err.h>
16 #include <linux/list.h>
17 #include <linux/slab.h>
18 #include <linux/nl80211.h>
19 #include <linux/debugfs.h>
20 #include <linux/notifier.h>
21 #include <linux/device.h>
22 #include <linux/etherdevice.h>
23 #include <linux/rtnetlink.h>
24 #include <linux/sched.h>
25 #include <net/genetlink.h>
26 #include <net/cfg80211.h>
31 #include "wext-compat.h"
34 /* name for sysfs, %d is appended */
35 #define PHY_NAME "phy"
37 MODULE_AUTHOR("Johannes Berg");
38 MODULE_LICENSE("GPL");
39 MODULE_DESCRIPTION("wireless configuration support");
40 MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME);
42 /* RCU-protected (and RTNL for writers) */
43 LIST_HEAD(cfg80211_rdev_list);
44 int cfg80211_rdev_list_generation;
47 static struct dentry *ieee80211_debugfs_dir;
49 /* for the cleanup, scan and event works */
50 struct workqueue_struct *cfg80211_wq;
52 static bool cfg80211_disable_40mhz_24ghz;
53 module_param(cfg80211_disable_40mhz_24ghz, bool, 0644);
54 MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz,
55 "Disable 40MHz support in the 2.4GHz band");
57 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
59 struct cfg80211_registered_device *result = NULL, *rdev;
63 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
64 if (rdev->wiphy_idx == wiphy_idx) {
73 int get_wiphy_idx(struct wiphy *wiphy)
75 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
77 return rdev->wiphy_idx;
80 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
82 struct cfg80211_registered_device *rdev;
86 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
92 static int cfg80211_dev_check_name(struct cfg80211_registered_device *rdev,
95 struct cfg80211_registered_device *rdev2;
96 int wiphy_idx, taken = -1, digits;
100 if (strlen(newname) > NL80211_WIPHY_NAME_MAXLEN)
103 /* prohibit calling the thing phy%d when %d is not its number */
104 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
105 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
106 /* count number of places needed to print wiphy_idx */
108 while (wiphy_idx /= 10)
111 * deny the name if it is phy<idx> where <idx> is printed
112 * without leading zeroes. taken == strlen(newname) here
114 if (taken == strlen(PHY_NAME) + digits)
118 /* Ensure another device does not already have this name. */
119 list_for_each_entry(rdev2, &cfg80211_rdev_list, list)
120 if (strcmp(newname, wiphy_name(&rdev2->wiphy)) == 0)
126 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
133 /* Ignore nop renames */
134 if (strcmp(newname, wiphy_name(&rdev->wiphy)) == 0)
137 result = cfg80211_dev_check_name(rdev, newname);
141 result = device_rename(&rdev->wiphy.dev, newname);
145 if (!IS_ERR_OR_NULL(rdev->wiphy.debugfsdir))
146 debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
147 rdev->wiphy.debugfsdir,
148 rdev->wiphy.debugfsdir->d_parent, newname);
150 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
155 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
158 struct wireless_dev *wdev;
161 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK))
164 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
167 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
168 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
171 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
175 /* failed -- clean up to old netns */
176 net = wiphy_net(&rdev->wiphy);
178 list_for_each_entry_continue_reverse(wdev,
179 &rdev->wiphy.wdev_list,
183 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
184 err = dev_change_net_namespace(wdev->netdev, net,
187 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
193 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
196 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE);
198 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
200 wiphy_net_set(&rdev->wiphy, net);
202 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev));
205 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
206 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
209 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
215 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
217 struct cfg80211_registered_device *rdev = data;
219 rdev_rfkill_poll(rdev);
222 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
223 struct wireless_dev *wdev)
225 lockdep_assert_held(&rdev->wiphy.mtx);
227 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE))
230 if (!wdev_running(wdev))
233 rdev_stop_p2p_device(rdev, wdev);
234 wdev->is_running = false;
238 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
239 if (WARN_ON(!rdev->scan_req->notified &&
240 (!rdev->int_scan_req ||
241 !rdev->int_scan_req->notified)))
242 rdev->scan_req->info.aborted = true;
243 ___cfg80211_scan_done(rdev, false);
247 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev,
248 struct wireless_dev *wdev)
250 lockdep_assert_held(&rdev->wiphy.mtx);
252 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_NAN))
255 if (!wdev_running(wdev))
258 rdev_stop_nan(rdev, wdev);
259 wdev->is_running = false;
264 void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy)
266 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
267 struct wireless_dev *wdev;
271 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
273 dev_close(wdev->netdev);
277 /* otherwise, check iftype */
281 switch (wdev->iftype) {
282 case NL80211_IFTYPE_P2P_DEVICE:
283 cfg80211_stop_p2p_device(rdev, wdev);
285 case NL80211_IFTYPE_NAN:
286 cfg80211_stop_nan(rdev, wdev);
295 EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces);
297 static int cfg80211_rfkill_set_block(void *data, bool blocked)
299 struct cfg80211_registered_device *rdev = data;
305 cfg80211_shutdown_all_interfaces(&rdev->wiphy);
311 static void cfg80211_rfkill_block_work(struct work_struct *work)
313 struct cfg80211_registered_device *rdev;
315 rdev = container_of(work, struct cfg80211_registered_device,
317 cfg80211_rfkill_set_block(rdev, true);
320 static void cfg80211_event_work(struct work_struct *work)
322 struct cfg80211_registered_device *rdev;
324 rdev = container_of(work, struct cfg80211_registered_device,
327 wiphy_lock(&rdev->wiphy);
328 cfg80211_process_rdev_events(rdev);
329 wiphy_unlock(&rdev->wiphy);
332 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev)
334 struct wireless_dev *wdev, *tmp;
339 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
340 if (wdev->nl_owner_dead) {
342 dev_close(wdev->netdev);
350 wiphy_lock(&rdev->wiphy);
351 list_for_each_entry_safe(wdev, tmp, &rdev->wiphy.wdev_list, list) {
352 if (wdev->nl_owner_dead) {
353 cfg80211_leave(rdev, wdev);
354 rdev_del_virtual_intf(rdev, wdev);
357 wiphy_unlock(&rdev->wiphy);
360 static void cfg80211_destroy_iface_wk(struct work_struct *work)
362 struct cfg80211_registered_device *rdev;
364 rdev = container_of(work, struct cfg80211_registered_device,
368 cfg80211_destroy_ifaces(rdev);
372 static void cfg80211_sched_scan_stop_wk(struct work_struct *work)
374 struct cfg80211_registered_device *rdev;
375 struct cfg80211_sched_scan_request *req, *tmp;
377 rdev = container_of(work, struct cfg80211_registered_device,
381 list_for_each_entry_safe(req, tmp, &rdev->sched_scan_req_list, list) {
382 if (req->nl_owner_dead)
383 cfg80211_stop_sched_scan_req(rdev, req, false);
388 static void cfg80211_propagate_radar_detect_wk(struct work_struct *work)
390 struct cfg80211_registered_device *rdev;
392 rdev = container_of(work, struct cfg80211_registered_device,
393 propagate_radar_detect_wk);
397 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->radar_chandef,
398 NL80211_DFS_UNAVAILABLE,
399 NL80211_RADAR_DETECTED);
404 static void cfg80211_propagate_cac_done_wk(struct work_struct *work)
406 struct cfg80211_registered_device *rdev;
408 rdev = container_of(work, struct cfg80211_registered_device,
409 propagate_cac_done_wk);
413 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->cac_done_chandef,
414 NL80211_DFS_AVAILABLE,
415 NL80211_RADAR_CAC_FINISHED);
420 /* exported functions */
422 struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv,
423 const char *requested_name)
425 static atomic_t wiphy_counter = ATOMIC_INIT(0);
427 struct cfg80211_registered_device *rdev;
430 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
431 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
432 WARN_ON(ops->connect && !ops->disconnect);
433 WARN_ON(ops->join_ibss && !ops->leave_ibss);
434 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
435 WARN_ON(ops->add_station && !ops->del_station);
436 WARN_ON(ops->add_mpath && !ops->del_mpath);
437 WARN_ON(ops->join_mesh && !ops->leave_mesh);
438 WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device);
439 WARN_ON(ops->start_ap && !ops->stop_ap);
440 WARN_ON(ops->join_ocb && !ops->leave_ocb);
441 WARN_ON(ops->suspend && !ops->resume);
442 WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop);
443 WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel);
444 WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch);
445 WARN_ON(ops->add_tx_ts && !ops->del_tx_ts);
447 alloc_size = sizeof(*rdev) + sizeof_priv;
449 rdev = kzalloc(alloc_size, GFP_KERNEL);
455 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter);
457 if (unlikely(rdev->wiphy_idx < 0)) {
459 atomic_dec(&wiphy_counter);
464 /* atomic_inc_return makes it start at 1, make it start at 0 */
467 /* give it a proper name */
468 if (requested_name && requested_name[0]) {
472 rv = cfg80211_dev_check_name(rdev, requested_name);
476 goto use_default_name;
479 rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name);
482 goto use_default_name;
487 /* NOTE: This is *probably* safe w/out holding rtnl because of
488 * the restrictions on phy names. Probably this call could
489 * fail if some other part of the kernel (re)named a device
490 * phyX. But, might should add some locking and check return
491 * value, and use a different name if this one exists?
493 rv = dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
500 mutex_init(&rdev->wiphy.mtx);
501 INIT_LIST_HEAD(&rdev->wiphy.wdev_list);
502 INIT_LIST_HEAD(&rdev->beacon_registrations);
503 spin_lock_init(&rdev->beacon_registrations_lock);
504 spin_lock_init(&rdev->bss_lock);
505 INIT_LIST_HEAD(&rdev->bss_list);
506 INIT_LIST_HEAD(&rdev->sched_scan_req_list);
507 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
508 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk,
509 cfg80211_dfs_channels_update_work);
510 #ifdef CONFIG_CFG80211_WEXT
511 rdev->wiphy.wext = &cfg80211_wext_handler;
514 device_initialize(&rdev->wiphy.dev);
515 rdev->wiphy.dev.class = &ieee80211_class;
516 rdev->wiphy.dev.platform_data = rdev;
517 device_enable_async_suspend(&rdev->wiphy.dev);
519 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk);
520 INIT_WORK(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk);
521 INIT_WORK(&rdev->sched_scan_res_wk, cfg80211_sched_scan_results_wk);
522 INIT_WORK(&rdev->propagate_radar_detect_wk,
523 cfg80211_propagate_radar_detect_wk);
524 INIT_WORK(&rdev->propagate_cac_done_wk, cfg80211_propagate_cac_done_wk);
525 INIT_WORK(&rdev->mgmt_registrations_update_wk,
526 cfg80211_mgmt_registrations_update_wk);
528 #ifdef CONFIG_CFG80211_DEFAULT_PS
529 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
532 wiphy_net_set(&rdev->wiphy, &init_net);
534 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
535 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
536 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
537 &rdev->rfkill_ops, rdev);
540 wiphy_free(&rdev->wiphy);
544 INIT_WORK(&rdev->rfkill_block, cfg80211_rfkill_block_work);
545 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
546 INIT_WORK(&rdev->event_work, cfg80211_event_work);
548 init_waitqueue_head(&rdev->dev_wait);
551 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
552 * Fragmentation and RTS threshold are disabled by default with the
555 rdev->wiphy.retry_short = 7;
556 rdev->wiphy.retry_long = 4;
557 rdev->wiphy.frag_threshold = (u32) -1;
558 rdev->wiphy.rts_threshold = (u32) -1;
559 rdev->wiphy.coverage_class = 0;
561 rdev->wiphy.max_num_csa_counters = 1;
563 rdev->wiphy.max_sched_scan_plans = 1;
564 rdev->wiphy.max_sched_scan_plan_interval = U32_MAX;
568 EXPORT_SYMBOL(wiphy_new_nm);
570 static int wiphy_verify_combinations(struct wiphy *wiphy)
572 const struct ieee80211_iface_combination *c;
575 for (i = 0; i < wiphy->n_iface_combinations; i++) {
579 c = &wiphy->iface_combinations[i];
582 * Combinations with just one interface aren't real,
583 * however we make an exception for DFS.
585 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths))
588 /* Need at least one channel */
589 if (WARN_ON(!c->num_different_channels))
593 * Put a sane limit on maximum number of different
594 * channels to simplify channel accounting code.
596 if (WARN_ON(c->num_different_channels >
597 CFG80211_MAX_NUM_DIFFERENT_CHANNELS))
600 /* DFS only works on one channel. */
601 if (WARN_ON(c->radar_detect_widths &&
602 (c->num_different_channels > 1)))
605 if (WARN_ON(!c->n_limits))
608 for (j = 0; j < c->n_limits; j++) {
609 u16 types = c->limits[j].types;
611 /* interface types shouldn't overlap */
612 if (WARN_ON(types & all_iftypes))
614 all_iftypes |= types;
616 if (WARN_ON(!c->limits[j].max))
619 /* Shouldn't list software iftypes in combinations! */
620 if (WARN_ON(wiphy->software_iftypes & types))
623 /* Only a single P2P_DEVICE can be allowed */
624 if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) &&
625 c->limits[j].max > 1))
628 /* Only a single NAN can be allowed */
629 if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) &&
630 c->limits[j].max > 1))
634 * This isn't well-defined right now. If you have an
635 * IBSS interface, then its beacon interval may change
636 * by joining other networks, and nothing prevents it
638 * So technically we probably shouldn't even allow AP
639 * and IBSS in the same interface, but it seems that
640 * some drivers support that, possibly only with fixed
641 * beacon intervals for IBSS.
643 if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) &&
644 c->beacon_int_min_gcd)) {
648 cnt += c->limits[j].max;
650 * Don't advertise an unsupported type
653 if (WARN_ON((wiphy->interface_modes & types) != types))
657 if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS)))
660 /* You can't even choose that many! */
661 if (WARN_ON(cnt < c->max_interfaces))
668 int wiphy_register(struct wiphy *wiphy)
670 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
672 enum nl80211_band band;
673 struct ieee80211_supported_band *sband;
674 bool have_band = false;
676 u16 ifmodes = wiphy->interface_modes;
679 if (WARN_ON(wiphy->wowlan &&
680 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
681 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
683 if (WARN_ON(wiphy->wowlan &&
684 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns &&
685 !wiphy->wowlan->tcp))
688 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
689 (!rdev->ops->tdls_channel_switch ||
690 !rdev->ops->tdls_cancel_channel_switch)))
693 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) &&
694 (!rdev->ops->start_nan || !rdev->ops->stop_nan ||
695 !rdev->ops->add_nan_func || !rdev->ops->del_nan_func ||
696 !(wiphy->nan_supported_bands & BIT(NL80211_BAND_2GHZ)))))
699 if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)))
702 if (WARN_ON(wiphy->pmsr_capa && !wiphy->pmsr_capa->ftm.supported))
705 if (wiphy->pmsr_capa && wiphy->pmsr_capa->ftm.supported) {
706 if (WARN_ON(!wiphy->pmsr_capa->ftm.asap &&
707 !wiphy->pmsr_capa->ftm.non_asap))
709 if (WARN_ON(!wiphy->pmsr_capa->ftm.preambles ||
710 !wiphy->pmsr_capa->ftm.bandwidths))
712 if (WARN_ON(wiphy->pmsr_capa->ftm.preambles &
713 ~(BIT(NL80211_PREAMBLE_LEGACY) |
714 BIT(NL80211_PREAMBLE_HT) |
715 BIT(NL80211_PREAMBLE_VHT) |
716 BIT(NL80211_PREAMBLE_HE) |
717 BIT(NL80211_PREAMBLE_DMG))))
719 if (WARN_ON((wiphy->pmsr_capa->ftm.trigger_based ||
720 wiphy->pmsr_capa->ftm.non_trigger_based) &&
721 !(wiphy->pmsr_capa->ftm.preambles &
722 BIT(NL80211_PREAMBLE_HE))))
724 if (WARN_ON(wiphy->pmsr_capa->ftm.bandwidths &
725 ~(BIT(NL80211_CHAN_WIDTH_20_NOHT) |
726 BIT(NL80211_CHAN_WIDTH_20) |
727 BIT(NL80211_CHAN_WIDTH_40) |
728 BIT(NL80211_CHAN_WIDTH_80) |
729 BIT(NL80211_CHAN_WIDTH_80P80) |
730 BIT(NL80211_CHAN_WIDTH_160) |
731 BIT(NL80211_CHAN_WIDTH_5) |
732 BIT(NL80211_CHAN_WIDTH_10))))
737 * if a wiphy has unsupported modes for regulatory channel enforcement,
738 * opt-out of enforcement checking
740 if (wiphy->interface_modes & ~(BIT(NL80211_IFTYPE_STATION) |
741 BIT(NL80211_IFTYPE_P2P_CLIENT) |
742 BIT(NL80211_IFTYPE_AP) |
743 BIT(NL80211_IFTYPE_P2P_GO) |
744 BIT(NL80211_IFTYPE_ADHOC) |
745 BIT(NL80211_IFTYPE_P2P_DEVICE) |
746 BIT(NL80211_IFTYPE_NAN) |
747 BIT(NL80211_IFTYPE_AP_VLAN) |
748 BIT(NL80211_IFTYPE_MONITOR)))
749 wiphy->regulatory_flags |= REGULATORY_IGNORE_STALE_KICKOFF;
751 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) &&
752 (wiphy->regulatory_flags &
753 (REGULATORY_CUSTOM_REG |
754 REGULATORY_STRICT_REG |
755 REGULATORY_COUNTRY_IE_FOLLOW_POWER |
756 REGULATORY_COUNTRY_IE_IGNORE))))
759 if (WARN_ON(wiphy->coalesce &&
760 (!wiphy->coalesce->n_rules ||
761 !wiphy->coalesce->n_patterns) &&
762 (!wiphy->coalesce->pattern_min_len ||
763 wiphy->coalesce->pattern_min_len >
764 wiphy->coalesce->pattern_max_len)))
767 if (WARN_ON(wiphy->ap_sme_capa &&
768 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
771 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
774 if (WARN_ON(wiphy->addresses &&
775 !is_zero_ether_addr(wiphy->perm_addr) &&
776 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
780 if (WARN_ON(wiphy->max_acl_mac_addrs &&
781 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) ||
782 !rdev->ops->set_mac_acl)))
785 /* assure only valid behaviours are flagged by driver
786 * hence subtract 2 as bit 0 is invalid.
788 if (WARN_ON(wiphy->bss_select_support &&
789 (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2))))
792 if (WARN_ON(wiphy_ext_feature_isset(&rdev->wiphy,
793 NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X) &&
794 (!rdev->ops->set_pmk || !rdev->ops->del_pmk)))
797 if (WARN_ON(!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
798 rdev->ops->update_connect_params))
801 if (wiphy->addresses)
802 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
804 /* sanity check ifmodes */
806 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
807 if (WARN_ON(ifmodes != wiphy->interface_modes))
808 wiphy->interface_modes = ifmodes;
810 res = wiphy_verify_combinations(wiphy);
814 /* sanity check supported bands/channels */
815 for (band = 0; band < NUM_NL80211_BANDS; band++) {
817 bool have_he = false;
819 sband = wiphy->bands[band];
824 if (WARN_ON(!sband->n_channels))
827 * on 60GHz or sub-1Ghz band, there are no legacy rates, so
830 if (WARN_ON((band != NL80211_BAND_60GHZ &&
831 band != NL80211_BAND_S1GHZ) &&
835 if (WARN_ON(band == NL80211_BAND_6GHZ &&
836 (sband->ht_cap.ht_supported ||
837 sband->vht_cap.vht_supported)))
841 * Since cfg80211_disable_40mhz_24ghz is global, we can
842 * modify the sband's ht data even if the driver uses a
843 * global structure for that.
845 if (cfg80211_disable_40mhz_24ghz &&
846 band == NL80211_BAND_2GHZ &&
847 sband->ht_cap.ht_supported) {
848 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
849 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
853 * Since we use a u32 for rate bitmaps in
854 * ieee80211_get_response_rate, we cannot
855 * have more than 32 legacy rates.
857 if (WARN_ON(sband->n_bitrates > 32))
860 for (i = 0; i < sband->n_channels; i++) {
861 sband->channels[i].orig_flags =
862 sband->channels[i].flags;
863 sband->channels[i].orig_mag = INT_MAX;
864 sband->channels[i].orig_mpwr =
865 sband->channels[i].max_power;
866 sband->channels[i].band = band;
868 if (WARN_ON(sband->channels[i].freq_offset >= 1000))
872 for (i = 0; i < sband->n_iftype_data; i++) {
873 const struct ieee80211_sband_iftype_data *iftd;
875 iftd = &sband->iftype_data[i];
877 if (WARN_ON(!iftd->types_mask))
879 if (WARN_ON(types & iftd->types_mask))
882 /* at least one piece of information must be present */
883 if (WARN_ON(!iftd->he_cap.has_he))
886 types |= iftd->types_mask;
889 have_he = iftd->he_cap.has_he;
895 if (WARN_ON(!have_he && band == NL80211_BAND_6GHZ))
906 for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
908 * Validate we have a policy (can be explicitly set to
909 * VENDOR_CMD_RAW_DATA which is non-NULL) and also that
910 * we have at least one of doit/dumpit.
912 if (WARN_ON(!rdev->wiphy.vendor_commands[i].policy))
914 if (WARN_ON(!rdev->wiphy.vendor_commands[i].doit &&
915 !rdev->wiphy.vendor_commands[i].dumpit))
920 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns &&
921 (!rdev->wiphy.wowlan->pattern_min_len ||
922 rdev->wiphy.wowlan->pattern_min_len >
923 rdev->wiphy.wowlan->pattern_max_len)))
927 /* check and set up bitrates */
928 ieee80211_set_bitrate_flags(wiphy);
930 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH;
933 res = device_add(&rdev->wiphy.dev);
939 /* set up regulatory info */
940 wiphy_regulatory_register(wiphy);
942 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
943 cfg80211_rdev_list_generation++;
946 rdev->wiphy.debugfsdir = debugfs_create_dir(wiphy_name(&rdev->wiphy),
947 ieee80211_debugfs_dir);
949 cfg80211_debugfs_rdev_add(rdev);
950 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
952 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
953 struct regulatory_request request;
955 request.wiphy_idx = get_wiphy_idx(wiphy);
956 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
957 request.alpha2[0] = '9';
958 request.alpha2[1] = '9';
960 nl80211_send_reg_change_event(&request);
963 /* Check that nobody globally advertises any capabilities they do not
964 * advertise on all possible interface types.
966 if (wiphy->extended_capabilities_len &&
967 wiphy->num_iftype_ext_capab &&
968 wiphy->iftype_ext_capab) {
969 u8 supported_on_all, j;
970 const struct wiphy_iftype_ext_capab *capab;
972 capab = wiphy->iftype_ext_capab;
973 for (j = 0; j < wiphy->extended_capabilities_len; j++) {
974 if (capab[0].extended_capabilities_len > j)
976 capab[0].extended_capabilities[j];
978 supported_on_all = 0x00;
979 for (i = 1; i < wiphy->num_iftype_ext_capab; i++) {
980 if (j >= capab[i].extended_capabilities_len) {
981 supported_on_all = 0x00;
985 capab[i].extended_capabilities[j];
987 if (WARN_ON(wiphy->extended_capabilities[j] &
993 rdev->wiphy.registered = true;
996 res = rfkill_register(rdev->rfkill);
998 rfkill_destroy(rdev->rfkill);
1000 wiphy_unregister(&rdev->wiphy);
1006 EXPORT_SYMBOL(wiphy_register);
1008 void wiphy_rfkill_start_polling(struct wiphy *wiphy)
1010 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1012 if (!rdev->ops->rfkill_poll)
1014 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
1015 rfkill_resume_polling(rdev->rfkill);
1017 EXPORT_SYMBOL(wiphy_rfkill_start_polling);
1019 void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
1021 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1023 rfkill_pause_polling(rdev->rfkill);
1025 EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
1027 void wiphy_unregister(struct wiphy *wiphy)
1029 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1031 wait_event(rdev->dev_wait, ({
1033 wiphy_lock(&rdev->wiphy);
1034 __count = rdev->opencount;
1035 wiphy_unlock(&rdev->wiphy);
1039 rfkill_unregister(rdev->rfkill);
1042 wiphy_lock(&rdev->wiphy);
1043 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
1044 rdev->wiphy.registered = false;
1046 WARN_ON(!list_empty(&rdev->wiphy.wdev_list));
1049 * First remove the hardware from everywhere, this makes
1050 * it impossible to find from userspace.
1052 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
1053 list_del_rcu(&rdev->list);
1057 * If this device got a regulatory hint tell core its
1058 * free to listen now to a new shiny device regulatory hint
1060 wiphy_regulatory_deregister(wiphy);
1062 cfg80211_rdev_list_generation++;
1063 device_del(&rdev->wiphy.dev);
1065 wiphy_unlock(&rdev->wiphy);
1068 flush_work(&rdev->scan_done_wk);
1069 cancel_work_sync(&rdev->conn_work);
1070 flush_work(&rdev->event_work);
1071 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
1072 flush_work(&rdev->destroy_work);
1073 flush_work(&rdev->sched_scan_stop_wk);
1074 flush_work(&rdev->propagate_radar_detect_wk);
1075 flush_work(&rdev->propagate_cac_done_wk);
1076 flush_work(&rdev->mgmt_registrations_update_wk);
1079 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
1080 rdev_set_wakeup(rdev, false);
1082 cfg80211_rdev_free_wowlan(rdev);
1083 cfg80211_rdev_free_coalesce(rdev);
1085 EXPORT_SYMBOL(wiphy_unregister);
1087 void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
1089 struct cfg80211_internal_bss *scan, *tmp;
1090 struct cfg80211_beacon_registration *reg, *treg;
1091 rfkill_destroy(rdev->rfkill);
1092 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
1093 list_del(®->list);
1096 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
1097 cfg80211_put_bss(&rdev->wiphy, &scan->pub);
1098 mutex_destroy(&rdev->wiphy.mtx);
1102 void wiphy_free(struct wiphy *wiphy)
1104 put_device(&wiphy->dev);
1106 EXPORT_SYMBOL(wiphy_free);
1108 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
1110 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1112 if (rfkill_set_hw_state(rdev->rfkill, blocked))
1113 schedule_work(&rdev->rfkill_block);
1115 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
1117 void cfg80211_cqm_config_free(struct wireless_dev *wdev)
1119 kfree(wdev->cqm_config);
1120 wdev->cqm_config = NULL;
1123 static void _cfg80211_unregister_wdev(struct wireless_dev *wdev,
1124 bool unregister_netdev)
1126 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1129 lockdep_assert_held(&rdev->wiphy.mtx);
1131 flush_work(&wdev->pmsr_free_wk);
1133 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE);
1135 wdev->registered = false;
1138 sysfs_remove_link(&wdev->netdev->dev.kobj, "phy80211");
1139 if (unregister_netdev)
1140 unregister_netdevice(wdev->netdev);
1143 list_del_rcu(&wdev->list);
1145 rdev->devlist_generation++;
1147 cfg80211_mlme_purge_registrations(wdev);
1149 switch (wdev->iftype) {
1150 case NL80211_IFTYPE_P2P_DEVICE:
1151 cfg80211_stop_p2p_device(rdev, wdev);
1153 case NL80211_IFTYPE_NAN:
1154 cfg80211_stop_nan(rdev, wdev);
1160 #ifdef CONFIG_CFG80211_WEXT
1161 kfree_sensitive(wdev->wext.keys);
1162 wdev->wext.keys = NULL;
1164 /* only initialized if we have a netdev */
1166 flush_work(&wdev->disconnect_wk);
1168 cfg80211_cqm_config_free(wdev);
1171 * Ensure that all events have been processed and
1174 cfg80211_process_wdev_events(wdev);
1176 if (WARN_ON(wdev->current_bss)) {
1177 cfg80211_unhold_bss(wdev->current_bss);
1178 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
1179 wdev->current_bss = NULL;
1183 void cfg80211_unregister_wdev(struct wireless_dev *wdev)
1185 _cfg80211_unregister_wdev(wdev, true);
1187 EXPORT_SYMBOL(cfg80211_unregister_wdev);
1189 static const struct device_type wiphy_type = {
1193 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
1194 enum nl80211_iftype iftype, int num)
1196 lockdep_assert_held(&rdev->wiphy.mtx);
1198 rdev->num_running_ifaces += num;
1199 if (iftype == NL80211_IFTYPE_MONITOR)
1200 rdev->num_running_monitor_ifaces += num;
1203 void __cfg80211_leave(struct cfg80211_registered_device *rdev,
1204 struct wireless_dev *wdev)
1206 struct net_device *dev = wdev->netdev;
1207 struct cfg80211_sched_scan_request *pos, *tmp;
1209 lockdep_assert_held(&rdev->wiphy.mtx);
1210 ASSERT_WDEV_LOCK(wdev);
1212 cfg80211_pmsr_wdev_down(wdev);
1214 switch (wdev->iftype) {
1215 case NL80211_IFTYPE_ADHOC:
1216 __cfg80211_leave_ibss(rdev, dev, true);
1218 case NL80211_IFTYPE_P2P_CLIENT:
1219 case NL80211_IFTYPE_STATION:
1220 list_for_each_entry_safe(pos, tmp, &rdev->sched_scan_req_list,
1222 if (dev == pos->dev)
1223 cfg80211_stop_sched_scan_req(rdev, pos, false);
1226 #ifdef CONFIG_CFG80211_WEXT
1227 kfree(wdev->wext.ie);
1228 wdev->wext.ie = NULL;
1229 wdev->wext.ie_len = 0;
1230 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1232 cfg80211_disconnect(rdev, dev,
1233 WLAN_REASON_DEAUTH_LEAVING, true);
1235 case NL80211_IFTYPE_MESH_POINT:
1236 __cfg80211_leave_mesh(rdev, dev);
1238 case NL80211_IFTYPE_AP:
1239 case NL80211_IFTYPE_P2P_GO:
1240 __cfg80211_stop_ap(rdev, dev, true);
1242 case NL80211_IFTYPE_OCB:
1243 __cfg80211_leave_ocb(rdev, dev);
1245 case NL80211_IFTYPE_P2P_DEVICE:
1246 case NL80211_IFTYPE_NAN:
1247 /* cannot happen, has no netdev */
1249 case NL80211_IFTYPE_AP_VLAN:
1250 case NL80211_IFTYPE_MONITOR:
1253 case NL80211_IFTYPE_UNSPECIFIED:
1254 case NL80211_IFTYPE_WDS:
1255 case NUM_NL80211_IFTYPES:
1261 void cfg80211_leave(struct cfg80211_registered_device *rdev,
1262 struct wireless_dev *wdev)
1265 __cfg80211_leave(rdev, wdev);
1269 void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev,
1272 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1273 struct cfg80211_event *ev;
1274 unsigned long flags;
1276 trace_cfg80211_stop_iface(wiphy, wdev);
1278 ev = kzalloc(sizeof(*ev), gfp);
1282 ev->type = EVENT_STOPPED;
1284 spin_lock_irqsave(&wdev->event_lock, flags);
1285 list_add_tail(&ev->list, &wdev->event_list);
1286 spin_unlock_irqrestore(&wdev->event_lock, flags);
1287 queue_work(cfg80211_wq, &rdev->event_work);
1289 EXPORT_SYMBOL(cfg80211_stop_iface);
1291 void cfg80211_init_wdev(struct wireless_dev *wdev)
1293 mutex_init(&wdev->mtx);
1294 INIT_LIST_HEAD(&wdev->event_list);
1295 spin_lock_init(&wdev->event_lock);
1296 INIT_LIST_HEAD(&wdev->mgmt_registrations);
1297 spin_lock_init(&wdev->mgmt_registrations_lock);
1298 INIT_LIST_HEAD(&wdev->pmsr_list);
1299 spin_lock_init(&wdev->pmsr_lock);
1300 INIT_WORK(&wdev->pmsr_free_wk, cfg80211_pmsr_free_wk);
1302 #ifdef CONFIG_CFG80211_WEXT
1303 wdev->wext.default_key = -1;
1304 wdev->wext.default_mgmt_key = -1;
1305 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1308 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
1312 /* allow mac80211 to determine the timeout */
1313 wdev->ps_timeout = -1;
1315 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1316 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
1317 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
1318 wdev->netdev->priv_flags |= IFF_DONT_BRIDGE;
1320 INIT_WORK(&wdev->disconnect_wk, cfg80211_autodisconnect_wk);
1323 void cfg80211_register_wdev(struct cfg80211_registered_device *rdev,
1324 struct wireless_dev *wdev)
1327 lockdep_assert_held(&rdev->wiphy.mtx);
1330 * We get here also when the interface changes network namespaces,
1331 * as it's registered into the new one, but we don't want it to
1332 * change ID in that case. Checking if the ID is already assigned
1333 * works, because 0 isn't considered a valid ID and the memory is
1336 if (!wdev->identifier)
1337 wdev->identifier = ++rdev->wdev_id;
1338 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
1339 rdev->devlist_generation++;
1340 wdev->registered = true;
1342 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
1345 int cfg80211_register_netdevice(struct net_device *dev)
1347 struct wireless_dev *wdev = dev->ieee80211_ptr;
1348 struct cfg80211_registered_device *rdev;
1356 rdev = wiphy_to_rdev(wdev->wiphy);
1358 lockdep_assert_held(&rdev->wiphy.mtx);
1360 /* we'll take care of this */
1361 wdev->registered = true;
1362 wdev->registering = true;
1363 ret = register_netdevice(dev);
1367 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
1369 pr_err("failed to add phy80211 symlink to netdev!\n");
1370 unregister_netdevice(dev);
1375 cfg80211_register_wdev(rdev, wdev);
1378 wdev->registering = false;
1380 wdev->registered = false;
1383 EXPORT_SYMBOL(cfg80211_register_netdevice);
1385 static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
1386 unsigned long state, void *ptr)
1388 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1389 struct wireless_dev *wdev = dev->ieee80211_ptr;
1390 struct cfg80211_registered_device *rdev;
1391 struct cfg80211_sched_scan_request *pos, *tmp;
1396 rdev = wiphy_to_rdev(wdev->wiphy);
1398 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
1401 case NETDEV_POST_INIT:
1402 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
1404 /* can only change netns with wiphy */
1405 dev->features |= NETIF_F_NETNS_LOCAL;
1407 cfg80211_init_wdev(wdev);
1409 case NETDEV_REGISTER:
1410 if (!wdev->registered) {
1411 wiphy_lock(&rdev->wiphy);
1412 cfg80211_register_wdev(rdev, wdev);
1413 wiphy_unlock(&rdev->wiphy);
1416 case NETDEV_UNREGISTER:
1418 * It is possible to get NETDEV_UNREGISTER multiple times,
1419 * so check wdev->registered.
1421 if (wdev->registered && !wdev->registering) {
1422 wiphy_lock(&rdev->wiphy);
1423 _cfg80211_unregister_wdev(wdev, false);
1424 wiphy_unlock(&rdev->wiphy);
1427 case NETDEV_GOING_DOWN:
1428 wiphy_lock(&rdev->wiphy);
1429 cfg80211_leave(rdev, wdev);
1430 wiphy_unlock(&rdev->wiphy);
1433 wiphy_lock(&rdev->wiphy);
1434 cfg80211_update_iface_num(rdev, wdev->iftype, -1);
1435 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
1436 if (WARN_ON(!rdev->scan_req->notified &&
1437 (!rdev->int_scan_req ||
1438 !rdev->int_scan_req->notified)))
1439 rdev->scan_req->info.aborted = true;
1440 ___cfg80211_scan_done(rdev, false);
1443 list_for_each_entry_safe(pos, tmp,
1444 &rdev->sched_scan_req_list, list) {
1445 if (WARN_ON(pos->dev == wdev->netdev))
1446 cfg80211_stop_sched_scan_req(rdev, pos, false);
1450 wiphy_unlock(&rdev->wiphy);
1451 wake_up(&rdev->dev_wait);
1454 wiphy_lock(&rdev->wiphy);
1455 cfg80211_update_iface_num(rdev, wdev->iftype, 1);
1457 switch (wdev->iftype) {
1458 #ifdef CONFIG_CFG80211_WEXT
1459 case NL80211_IFTYPE_ADHOC:
1460 cfg80211_ibss_wext_join(rdev, wdev);
1462 case NL80211_IFTYPE_STATION:
1463 cfg80211_mgd_wext_connect(rdev, wdev);
1466 #ifdef CONFIG_MAC80211_MESH
1467 case NL80211_IFTYPE_MESH_POINT:
1469 /* backward compat code... */
1470 struct mesh_setup setup;
1471 memcpy(&setup, &default_mesh_setup,
1473 /* back compat only needed for mesh_id */
1474 setup.mesh_id = wdev->ssid;
1475 setup.mesh_id_len = wdev->mesh_id_up_len;
1476 if (wdev->mesh_id_up_len)
1477 __cfg80211_join_mesh(rdev, dev,
1479 &default_mesh_config);
1490 * Configure power management to the driver here so that its
1491 * correctly set also after interface type changes etc.
1493 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1494 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
1495 rdev->ops->set_power_mgmt &&
1496 rdev_set_power_mgmt(rdev, dev, wdev->ps,
1497 wdev->ps_timeout)) {
1498 /* assume this means it's off */
1501 wiphy_unlock(&rdev->wiphy);
1504 if (!cfg80211_iftype_allowed(wdev->wiphy, wdev->iftype,
1505 wdev->use_4addr, 0))
1506 return notifier_from_errno(-EOPNOTSUPP);
1508 if (rfkill_blocked(rdev->rfkill))
1509 return notifier_from_errno(-ERFKILL);
1515 wireless_nlevent_flush();
1520 static struct notifier_block cfg80211_netdev_notifier = {
1521 .notifier_call = cfg80211_netdev_notifier_call,
1524 static void __net_exit cfg80211_pernet_exit(struct net *net)
1526 struct cfg80211_registered_device *rdev;
1529 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1530 if (net_eq(wiphy_net(&rdev->wiphy), net))
1531 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
1536 static struct pernet_operations cfg80211_pernet_ops = {
1537 .exit = cfg80211_pernet_exit,
1540 static int __init cfg80211_init(void)
1544 err = register_pernet_device(&cfg80211_pernet_ops);
1546 goto out_fail_pernet;
1548 err = wiphy_sysfs_init();
1550 goto out_fail_sysfs;
1552 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
1554 goto out_fail_notifier;
1556 err = nl80211_init();
1558 goto out_fail_nl80211;
1560 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
1562 err = regulatory_init();
1566 cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM);
1577 debugfs_remove(ieee80211_debugfs_dir);
1580 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1584 unregister_pernet_device(&cfg80211_pernet_ops);
1588 fs_initcall(cfg80211_init);
1590 static void __exit cfg80211_exit(void)
1592 debugfs_remove(ieee80211_debugfs_dir);
1594 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1597 unregister_pernet_device(&cfg80211_pernet_ops);
1598 destroy_workqueue(cfg80211_wq);
1600 module_exit(cfg80211_exit);