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) 2018-2022 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;
338 list_for_each_entry_safe(wdev, tmp, &rdev->wiphy.wdev_list, list) {
339 if (wdev->nl_owner_dead) {
341 dev_close(wdev->netdev);
343 wiphy_lock(&rdev->wiphy);
344 cfg80211_leave(rdev, wdev);
345 rdev_del_virtual_intf(rdev, wdev);
346 wiphy_unlock(&rdev->wiphy);
351 static void cfg80211_destroy_iface_wk(struct work_struct *work)
353 struct cfg80211_registered_device *rdev;
355 rdev = container_of(work, struct cfg80211_registered_device,
359 cfg80211_destroy_ifaces(rdev);
363 static void cfg80211_sched_scan_stop_wk(struct work_struct *work)
365 struct cfg80211_registered_device *rdev;
366 struct cfg80211_sched_scan_request *req, *tmp;
368 rdev = container_of(work, struct cfg80211_registered_device,
372 list_for_each_entry_safe(req, tmp, &rdev->sched_scan_req_list, list) {
373 if (req->nl_owner_dead)
374 cfg80211_stop_sched_scan_req(rdev, req, false);
379 static void cfg80211_propagate_radar_detect_wk(struct work_struct *work)
381 struct cfg80211_registered_device *rdev;
383 rdev = container_of(work, struct cfg80211_registered_device,
384 propagate_radar_detect_wk);
388 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->radar_chandef,
389 NL80211_DFS_UNAVAILABLE,
390 NL80211_RADAR_DETECTED);
395 static void cfg80211_propagate_cac_done_wk(struct work_struct *work)
397 struct cfg80211_registered_device *rdev;
399 rdev = container_of(work, struct cfg80211_registered_device,
400 propagate_cac_done_wk);
404 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->cac_done_chandef,
405 NL80211_DFS_AVAILABLE,
406 NL80211_RADAR_CAC_FINISHED);
411 /* exported functions */
413 struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv,
414 const char *requested_name)
416 static atomic_t wiphy_counter = ATOMIC_INIT(0);
418 struct cfg80211_registered_device *rdev;
421 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
422 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
423 WARN_ON(ops->connect && !ops->disconnect);
424 WARN_ON(ops->join_ibss && !ops->leave_ibss);
425 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
426 WARN_ON(ops->add_station && !ops->del_station);
427 WARN_ON(ops->add_mpath && !ops->del_mpath);
428 WARN_ON(ops->join_mesh && !ops->leave_mesh);
429 WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device);
430 WARN_ON(ops->start_ap && !ops->stop_ap);
431 WARN_ON(ops->join_ocb && !ops->leave_ocb);
432 WARN_ON(ops->suspend && !ops->resume);
433 WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop);
434 WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel);
435 WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch);
436 WARN_ON(ops->add_tx_ts && !ops->del_tx_ts);
438 alloc_size = sizeof(*rdev) + sizeof_priv;
440 rdev = kzalloc(alloc_size, GFP_KERNEL);
446 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter);
448 if (unlikely(rdev->wiphy_idx < 0)) {
450 atomic_dec(&wiphy_counter);
455 /* atomic_inc_return makes it start at 1, make it start at 0 */
458 /* give it a proper name */
459 if (requested_name && requested_name[0]) {
463 rv = cfg80211_dev_check_name(rdev, requested_name);
467 goto use_default_name;
470 rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name);
473 goto use_default_name;
478 /* NOTE: This is *probably* safe w/out holding rtnl because of
479 * the restrictions on phy names. Probably this call could
480 * fail if some other part of the kernel (re)named a device
481 * phyX. But, might should add some locking and check return
482 * value, and use a different name if this one exists?
484 rv = dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
491 mutex_init(&rdev->wiphy.mtx);
492 INIT_LIST_HEAD(&rdev->wiphy.wdev_list);
493 INIT_LIST_HEAD(&rdev->beacon_registrations);
494 spin_lock_init(&rdev->beacon_registrations_lock);
495 spin_lock_init(&rdev->bss_lock);
496 INIT_LIST_HEAD(&rdev->bss_list);
497 INIT_LIST_HEAD(&rdev->sched_scan_req_list);
498 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
499 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk,
500 cfg80211_dfs_channels_update_work);
501 #ifdef CONFIG_CFG80211_WEXT
502 rdev->wiphy.wext = &cfg80211_wext_handler;
505 device_initialize(&rdev->wiphy.dev);
506 rdev->wiphy.dev.class = &ieee80211_class;
507 rdev->wiphy.dev.platform_data = rdev;
508 device_enable_async_suspend(&rdev->wiphy.dev);
510 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk);
511 INIT_WORK(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk);
512 INIT_WORK(&rdev->sched_scan_res_wk, cfg80211_sched_scan_results_wk);
513 INIT_WORK(&rdev->propagate_radar_detect_wk,
514 cfg80211_propagate_radar_detect_wk);
515 INIT_WORK(&rdev->propagate_cac_done_wk, cfg80211_propagate_cac_done_wk);
516 INIT_WORK(&rdev->mgmt_registrations_update_wk,
517 cfg80211_mgmt_registrations_update_wk);
518 spin_lock_init(&rdev->mgmt_registrations_lock);
520 #ifdef CONFIG_CFG80211_DEFAULT_PS
521 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
524 wiphy_net_set(&rdev->wiphy, &init_net);
526 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
527 rdev->wiphy.rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
528 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
529 &rdev->rfkill_ops, rdev);
531 if (!rdev->wiphy.rfkill) {
532 wiphy_free(&rdev->wiphy);
536 INIT_WORK(&rdev->rfkill_block, cfg80211_rfkill_block_work);
537 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
538 INIT_WORK(&rdev->event_work, cfg80211_event_work);
539 INIT_WORK(&rdev->background_cac_abort_wk,
540 cfg80211_background_cac_abort_wk);
541 INIT_DELAYED_WORK(&rdev->background_cac_done_wk,
542 cfg80211_background_cac_done_wk);
544 init_waitqueue_head(&rdev->dev_wait);
547 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
548 * Fragmentation and RTS threshold are disabled by default with the
551 rdev->wiphy.retry_short = 7;
552 rdev->wiphy.retry_long = 4;
553 rdev->wiphy.frag_threshold = (u32) -1;
554 rdev->wiphy.rts_threshold = (u32) -1;
555 rdev->wiphy.coverage_class = 0;
557 rdev->wiphy.max_num_csa_counters = 1;
559 rdev->wiphy.max_sched_scan_plans = 1;
560 rdev->wiphy.max_sched_scan_plan_interval = U32_MAX;
564 EXPORT_SYMBOL(wiphy_new_nm);
566 static int wiphy_verify_combinations(struct wiphy *wiphy)
568 const struct ieee80211_iface_combination *c;
571 for (i = 0; i < wiphy->n_iface_combinations; i++) {
575 c = &wiphy->iface_combinations[i];
578 * Combinations with just one interface aren't real,
579 * however we make an exception for DFS.
581 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths))
584 /* Need at least one channel */
585 if (WARN_ON(!c->num_different_channels))
588 /* DFS only works on one channel. */
589 if (WARN_ON(c->radar_detect_widths &&
590 (c->num_different_channels > 1)))
593 if (WARN_ON(!c->n_limits))
596 for (j = 0; j < c->n_limits; j++) {
597 u16 types = c->limits[j].types;
599 /* interface types shouldn't overlap */
600 if (WARN_ON(types & all_iftypes))
602 all_iftypes |= types;
604 if (WARN_ON(!c->limits[j].max))
607 /* Shouldn't list software iftypes in combinations! */
608 if (WARN_ON(wiphy->software_iftypes & types))
611 /* Only a single P2P_DEVICE can be allowed */
612 if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) &&
613 c->limits[j].max > 1))
616 /* Only a single NAN can be allowed */
617 if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) &&
618 c->limits[j].max > 1))
622 * This isn't well-defined right now. If you have an
623 * IBSS interface, then its beacon interval may change
624 * by joining other networks, and nothing prevents it
626 * So technically we probably shouldn't even allow AP
627 * and IBSS in the same interface, but it seems that
628 * some drivers support that, possibly only with fixed
629 * beacon intervals for IBSS.
631 if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) &&
632 c->beacon_int_min_gcd)) {
636 cnt += c->limits[j].max;
638 * Don't advertise an unsupported type
641 if (WARN_ON((wiphy->interface_modes & types) != types))
645 if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS)))
648 /* You can't even choose that many! */
649 if (WARN_ON(cnt < c->max_interfaces))
656 int wiphy_register(struct wiphy *wiphy)
658 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
660 enum nl80211_band band;
661 struct ieee80211_supported_band *sband;
662 bool have_band = false;
664 u16 ifmodes = wiphy->interface_modes;
667 if (WARN_ON(wiphy->wowlan &&
668 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
669 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
671 if (WARN_ON(wiphy->wowlan &&
672 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns &&
673 !wiphy->wowlan->tcp))
676 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
677 (!rdev->ops->tdls_channel_switch ||
678 !rdev->ops->tdls_cancel_channel_switch)))
681 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) &&
682 (!rdev->ops->start_nan || !rdev->ops->stop_nan ||
683 !rdev->ops->add_nan_func || !rdev->ops->del_nan_func ||
684 !(wiphy->nan_supported_bands & BIT(NL80211_BAND_2GHZ)))))
687 if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)))
690 if (WARN_ON(wiphy->pmsr_capa && !wiphy->pmsr_capa->ftm.supported))
693 if (wiphy->pmsr_capa && wiphy->pmsr_capa->ftm.supported) {
694 if (WARN_ON(!wiphy->pmsr_capa->ftm.asap &&
695 !wiphy->pmsr_capa->ftm.non_asap))
697 if (WARN_ON(!wiphy->pmsr_capa->ftm.preambles ||
698 !wiphy->pmsr_capa->ftm.bandwidths))
700 if (WARN_ON(wiphy->pmsr_capa->ftm.preambles &
701 ~(BIT(NL80211_PREAMBLE_LEGACY) |
702 BIT(NL80211_PREAMBLE_HT) |
703 BIT(NL80211_PREAMBLE_VHT) |
704 BIT(NL80211_PREAMBLE_HE) |
705 BIT(NL80211_PREAMBLE_DMG))))
707 if (WARN_ON((wiphy->pmsr_capa->ftm.trigger_based ||
708 wiphy->pmsr_capa->ftm.non_trigger_based) &&
709 !(wiphy->pmsr_capa->ftm.preambles &
710 BIT(NL80211_PREAMBLE_HE))))
712 if (WARN_ON(wiphy->pmsr_capa->ftm.bandwidths &
713 ~(BIT(NL80211_CHAN_WIDTH_20_NOHT) |
714 BIT(NL80211_CHAN_WIDTH_20) |
715 BIT(NL80211_CHAN_WIDTH_40) |
716 BIT(NL80211_CHAN_WIDTH_80) |
717 BIT(NL80211_CHAN_WIDTH_80P80) |
718 BIT(NL80211_CHAN_WIDTH_160) |
719 BIT(NL80211_CHAN_WIDTH_5) |
720 BIT(NL80211_CHAN_WIDTH_10))))
725 * if a wiphy has unsupported modes for regulatory channel enforcement,
726 * opt-out of enforcement checking
728 if (wiphy->interface_modes & ~(BIT(NL80211_IFTYPE_STATION) |
729 BIT(NL80211_IFTYPE_P2P_CLIENT) |
730 BIT(NL80211_IFTYPE_AP) |
731 BIT(NL80211_IFTYPE_MESH_POINT) |
732 BIT(NL80211_IFTYPE_P2P_GO) |
733 BIT(NL80211_IFTYPE_ADHOC) |
734 BIT(NL80211_IFTYPE_P2P_DEVICE) |
735 BIT(NL80211_IFTYPE_NAN) |
736 BIT(NL80211_IFTYPE_AP_VLAN) |
737 BIT(NL80211_IFTYPE_MONITOR)))
738 wiphy->regulatory_flags |= REGULATORY_IGNORE_STALE_KICKOFF;
740 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) &&
741 (wiphy->regulatory_flags &
742 (REGULATORY_CUSTOM_REG |
743 REGULATORY_STRICT_REG |
744 REGULATORY_COUNTRY_IE_FOLLOW_POWER |
745 REGULATORY_COUNTRY_IE_IGNORE))))
748 if (WARN_ON(wiphy->coalesce &&
749 (!wiphy->coalesce->n_rules ||
750 !wiphy->coalesce->n_patterns) &&
751 (!wiphy->coalesce->pattern_min_len ||
752 wiphy->coalesce->pattern_min_len >
753 wiphy->coalesce->pattern_max_len)))
756 if (WARN_ON(wiphy->ap_sme_capa &&
757 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
760 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
763 if (WARN_ON(wiphy->addresses &&
764 !is_zero_ether_addr(wiphy->perm_addr) &&
765 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
769 if (WARN_ON(wiphy->max_acl_mac_addrs &&
770 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) ||
771 !rdev->ops->set_mac_acl)))
774 /* assure only valid behaviours are flagged by driver
775 * hence subtract 2 as bit 0 is invalid.
777 if (WARN_ON(wiphy->bss_select_support &&
778 (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2))))
781 if (WARN_ON(wiphy_ext_feature_isset(&rdev->wiphy,
782 NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X) &&
783 (!rdev->ops->set_pmk || !rdev->ops->del_pmk)))
786 if (WARN_ON(!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
787 rdev->ops->update_connect_params))
790 if (wiphy->addresses)
791 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
793 /* sanity check ifmodes */
795 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
796 if (WARN_ON(ifmodes != wiphy->interface_modes))
797 wiphy->interface_modes = ifmodes;
799 res = wiphy_verify_combinations(wiphy);
803 /* sanity check supported bands/channels */
804 for (band = 0; band < NUM_NL80211_BANDS; band++) {
806 bool have_he = false;
808 sband = wiphy->bands[band];
813 if (WARN_ON(!sband->n_channels))
816 * on 60GHz or sub-1Ghz band, there are no legacy rates, so
819 if (WARN_ON((band != NL80211_BAND_60GHZ &&
820 band != NL80211_BAND_S1GHZ) &&
824 if (WARN_ON(band == NL80211_BAND_6GHZ &&
825 (sband->ht_cap.ht_supported ||
826 sband->vht_cap.vht_supported)))
830 * Since cfg80211_disable_40mhz_24ghz is global, we can
831 * modify the sband's ht data even if the driver uses a
832 * global structure for that.
834 if (cfg80211_disable_40mhz_24ghz &&
835 band == NL80211_BAND_2GHZ &&
836 sband->ht_cap.ht_supported) {
837 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
838 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
842 * Since we use a u32 for rate bitmaps in
843 * ieee80211_get_response_rate, we cannot
844 * have more than 32 legacy rates.
846 if (WARN_ON(sband->n_bitrates > 32))
849 for (i = 0; i < sband->n_channels; i++) {
850 sband->channels[i].orig_flags =
851 sband->channels[i].flags;
852 sband->channels[i].orig_mag = INT_MAX;
853 sband->channels[i].orig_mpwr =
854 sband->channels[i].max_power;
855 sband->channels[i].band = band;
857 if (WARN_ON(sband->channels[i].freq_offset >= 1000))
861 for (i = 0; i < sband->n_iftype_data; i++) {
862 const struct ieee80211_sband_iftype_data *iftd;
864 iftd = &sband->iftype_data[i];
866 if (WARN_ON(!iftd->types_mask))
868 if (WARN_ON(types & iftd->types_mask))
871 /* at least one piece of information must be present */
872 if (WARN_ON(!iftd->he_cap.has_he))
875 types |= iftd->types_mask;
878 have_he = iftd->he_cap.has_he;
884 if (WARN_ON(!have_he && band == NL80211_BAND_6GHZ))
895 for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
897 * Validate we have a policy (can be explicitly set to
898 * VENDOR_CMD_RAW_DATA which is non-NULL) and also that
899 * we have at least one of doit/dumpit.
901 if (WARN_ON(!rdev->wiphy.vendor_commands[i].policy))
903 if (WARN_ON(!rdev->wiphy.vendor_commands[i].doit &&
904 !rdev->wiphy.vendor_commands[i].dumpit))
909 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns &&
910 (!rdev->wiphy.wowlan->pattern_min_len ||
911 rdev->wiphy.wowlan->pattern_min_len >
912 rdev->wiphy.wowlan->pattern_max_len)))
916 /* check and set up bitrates */
917 ieee80211_set_bitrate_flags(wiphy);
919 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH;
922 res = device_add(&rdev->wiphy.dev);
928 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
929 cfg80211_rdev_list_generation++;
932 rdev->wiphy.debugfsdir = debugfs_create_dir(wiphy_name(&rdev->wiphy),
933 ieee80211_debugfs_dir);
935 cfg80211_debugfs_rdev_add(rdev);
936 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
938 /* set up regulatory info */
939 wiphy_regulatory_register(wiphy);
941 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
942 struct regulatory_request request;
944 request.wiphy_idx = get_wiphy_idx(wiphy);
945 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
946 request.alpha2[0] = '9';
947 request.alpha2[1] = '9';
949 nl80211_send_reg_change_event(&request);
952 /* Check that nobody globally advertises any capabilities they do not
953 * advertise on all possible interface types.
955 if (wiphy->extended_capabilities_len &&
956 wiphy->num_iftype_ext_capab &&
957 wiphy->iftype_ext_capab) {
958 u8 supported_on_all, j;
959 const struct wiphy_iftype_ext_capab *capab;
961 capab = wiphy->iftype_ext_capab;
962 for (j = 0; j < wiphy->extended_capabilities_len; j++) {
963 if (capab[0].extended_capabilities_len > j)
965 capab[0].extended_capabilities[j];
967 supported_on_all = 0x00;
968 for (i = 1; i < wiphy->num_iftype_ext_capab; i++) {
969 if (j >= capab[i].extended_capabilities_len) {
970 supported_on_all = 0x00;
974 capab[i].extended_capabilities[j];
976 if (WARN_ON(wiphy->extended_capabilities[j] &
982 rdev->wiphy.registered = true;
985 res = rfkill_register(rdev->wiphy.rfkill);
987 rfkill_destroy(rdev->wiphy.rfkill);
988 rdev->wiphy.rfkill = NULL;
989 wiphy_unregister(&rdev->wiphy);
995 EXPORT_SYMBOL(wiphy_register);
997 void wiphy_rfkill_start_polling(struct wiphy *wiphy)
999 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1001 if (!rdev->ops->rfkill_poll)
1003 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
1004 rfkill_resume_polling(wiphy->rfkill);
1006 EXPORT_SYMBOL(wiphy_rfkill_start_polling);
1008 void wiphy_unregister(struct wiphy *wiphy)
1010 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1012 wait_event(rdev->dev_wait, ({
1014 wiphy_lock(&rdev->wiphy);
1015 __count = rdev->opencount;
1016 wiphy_unlock(&rdev->wiphy);
1019 if (rdev->wiphy.rfkill)
1020 rfkill_unregister(rdev->wiphy.rfkill);
1023 wiphy_lock(&rdev->wiphy);
1024 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
1025 rdev->wiphy.registered = false;
1027 WARN_ON(!list_empty(&rdev->wiphy.wdev_list));
1030 * First remove the hardware from everywhere, this makes
1031 * it impossible to find from userspace.
1033 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
1034 list_del_rcu(&rdev->list);
1038 * If this device got a regulatory hint tell core its
1039 * free to listen now to a new shiny device regulatory hint
1041 wiphy_regulatory_deregister(wiphy);
1043 cfg80211_rdev_list_generation++;
1044 device_del(&rdev->wiphy.dev);
1046 wiphy_unlock(&rdev->wiphy);
1049 flush_work(&rdev->scan_done_wk);
1050 cancel_work_sync(&rdev->conn_work);
1051 flush_work(&rdev->event_work);
1052 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
1053 cancel_delayed_work_sync(&rdev->background_cac_done_wk);
1054 flush_work(&rdev->destroy_work);
1055 flush_work(&rdev->sched_scan_stop_wk);
1056 flush_work(&rdev->propagate_radar_detect_wk);
1057 flush_work(&rdev->propagate_cac_done_wk);
1058 flush_work(&rdev->mgmt_registrations_update_wk);
1059 flush_work(&rdev->background_cac_abort_wk);
1062 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
1063 rdev_set_wakeup(rdev, false);
1065 cfg80211_rdev_free_wowlan(rdev);
1066 cfg80211_rdev_free_coalesce(rdev);
1068 EXPORT_SYMBOL(wiphy_unregister);
1070 void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
1072 struct cfg80211_internal_bss *scan, *tmp;
1073 struct cfg80211_beacon_registration *reg, *treg;
1074 rfkill_destroy(rdev->wiphy.rfkill);
1075 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
1076 list_del(®->list);
1079 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
1080 cfg80211_put_bss(&rdev->wiphy, &scan->pub);
1081 mutex_destroy(&rdev->wiphy.mtx);
1084 * The 'regd' can only be non-NULL if we never finished
1085 * initializing the wiphy and thus never went through the
1086 * unregister path - e.g. in failure scenarios. Thus, it
1087 * cannot have been visible to anyone if non-NULL, so we
1088 * can just free it here.
1090 kfree(rcu_dereference_raw(rdev->wiphy.regd));
1095 void wiphy_free(struct wiphy *wiphy)
1097 put_device(&wiphy->dev);
1099 EXPORT_SYMBOL(wiphy_free);
1101 void wiphy_rfkill_set_hw_state_reason(struct wiphy *wiphy, bool blocked,
1102 enum rfkill_hard_block_reasons reason)
1104 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1106 if (rfkill_set_hw_state_reason(wiphy->rfkill, blocked, reason))
1107 schedule_work(&rdev->rfkill_block);
1109 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state_reason);
1111 void cfg80211_cqm_config_free(struct wireless_dev *wdev)
1113 kfree(wdev->cqm_config);
1114 wdev->cqm_config = NULL;
1117 static void _cfg80211_unregister_wdev(struct wireless_dev *wdev,
1118 bool unregister_netdev)
1120 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1123 lockdep_assert_held(&rdev->wiphy.mtx);
1125 flush_work(&wdev->pmsr_free_wk);
1127 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE);
1129 wdev->registered = false;
1132 sysfs_remove_link(&wdev->netdev->dev.kobj, "phy80211");
1133 if (unregister_netdev)
1134 unregister_netdevice(wdev->netdev);
1137 list_del_rcu(&wdev->list);
1139 rdev->devlist_generation++;
1141 cfg80211_mlme_purge_registrations(wdev);
1143 switch (wdev->iftype) {
1144 case NL80211_IFTYPE_P2P_DEVICE:
1145 cfg80211_stop_p2p_device(rdev, wdev);
1147 case NL80211_IFTYPE_NAN:
1148 cfg80211_stop_nan(rdev, wdev);
1154 #ifdef CONFIG_CFG80211_WEXT
1155 kfree_sensitive(wdev->wext.keys);
1156 wdev->wext.keys = NULL;
1158 /* only initialized if we have a netdev */
1160 flush_work(&wdev->disconnect_wk);
1162 cfg80211_cqm_config_free(wdev);
1165 * Ensure that all events have been processed and
1168 cfg80211_process_wdev_events(wdev);
1170 if (WARN_ON(wdev->current_bss)) {
1171 cfg80211_unhold_bss(wdev->current_bss);
1172 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
1173 wdev->current_bss = NULL;
1177 void cfg80211_unregister_wdev(struct wireless_dev *wdev)
1179 _cfg80211_unregister_wdev(wdev, true);
1181 EXPORT_SYMBOL(cfg80211_unregister_wdev);
1183 static const struct device_type wiphy_type = {
1187 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
1188 enum nl80211_iftype iftype, int num)
1190 lockdep_assert_held(&rdev->wiphy.mtx);
1192 rdev->num_running_ifaces += num;
1193 if (iftype == NL80211_IFTYPE_MONITOR)
1194 rdev->num_running_monitor_ifaces += num;
1197 void __cfg80211_leave(struct cfg80211_registered_device *rdev,
1198 struct wireless_dev *wdev)
1200 struct net_device *dev = wdev->netdev;
1201 struct cfg80211_sched_scan_request *pos, *tmp;
1203 lockdep_assert_held(&rdev->wiphy.mtx);
1204 ASSERT_WDEV_LOCK(wdev);
1206 cfg80211_pmsr_wdev_down(wdev);
1208 cfg80211_stop_background_radar_detection(wdev);
1210 switch (wdev->iftype) {
1211 case NL80211_IFTYPE_ADHOC:
1212 __cfg80211_leave_ibss(rdev, dev, true);
1214 case NL80211_IFTYPE_P2P_CLIENT:
1215 case NL80211_IFTYPE_STATION:
1216 list_for_each_entry_safe(pos, tmp, &rdev->sched_scan_req_list,
1218 if (dev == pos->dev)
1219 cfg80211_stop_sched_scan_req(rdev, pos, false);
1222 #ifdef CONFIG_CFG80211_WEXT
1223 kfree(wdev->wext.ie);
1224 wdev->wext.ie = NULL;
1225 wdev->wext.ie_len = 0;
1226 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1228 cfg80211_disconnect(rdev, dev,
1229 WLAN_REASON_DEAUTH_LEAVING, true);
1231 case NL80211_IFTYPE_MESH_POINT:
1232 __cfg80211_leave_mesh(rdev, dev);
1234 case NL80211_IFTYPE_AP:
1235 case NL80211_IFTYPE_P2P_GO:
1236 __cfg80211_stop_ap(rdev, dev, true);
1238 case NL80211_IFTYPE_OCB:
1239 __cfg80211_leave_ocb(rdev, dev);
1241 case NL80211_IFTYPE_P2P_DEVICE:
1242 case NL80211_IFTYPE_NAN:
1243 /* cannot happen, has no netdev */
1245 case NL80211_IFTYPE_AP_VLAN:
1246 case NL80211_IFTYPE_MONITOR:
1249 case NL80211_IFTYPE_UNSPECIFIED:
1250 case NL80211_IFTYPE_WDS:
1251 case NUM_NL80211_IFTYPES:
1257 void cfg80211_leave(struct cfg80211_registered_device *rdev,
1258 struct wireless_dev *wdev)
1261 __cfg80211_leave(rdev, wdev);
1265 void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev,
1268 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1269 struct cfg80211_event *ev;
1270 unsigned long flags;
1272 trace_cfg80211_stop_iface(wiphy, wdev);
1274 ev = kzalloc(sizeof(*ev), gfp);
1278 ev->type = EVENT_STOPPED;
1280 spin_lock_irqsave(&wdev->event_lock, flags);
1281 list_add_tail(&ev->list, &wdev->event_list);
1282 spin_unlock_irqrestore(&wdev->event_lock, flags);
1283 queue_work(cfg80211_wq, &rdev->event_work);
1285 EXPORT_SYMBOL(cfg80211_stop_iface);
1287 void cfg80211_init_wdev(struct wireless_dev *wdev)
1289 mutex_init(&wdev->mtx);
1290 INIT_LIST_HEAD(&wdev->event_list);
1291 spin_lock_init(&wdev->event_lock);
1292 INIT_LIST_HEAD(&wdev->mgmt_registrations);
1293 INIT_LIST_HEAD(&wdev->pmsr_list);
1294 spin_lock_init(&wdev->pmsr_lock);
1295 INIT_WORK(&wdev->pmsr_free_wk, cfg80211_pmsr_free_wk);
1297 #ifdef CONFIG_CFG80211_WEXT
1298 wdev->wext.default_key = -1;
1299 wdev->wext.default_mgmt_key = -1;
1300 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1303 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
1307 /* allow mac80211 to determine the timeout */
1308 wdev->ps_timeout = -1;
1310 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1311 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
1312 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
1313 wdev->netdev->priv_flags |= IFF_DONT_BRIDGE;
1315 INIT_WORK(&wdev->disconnect_wk, cfg80211_autodisconnect_wk);
1318 void cfg80211_register_wdev(struct cfg80211_registered_device *rdev,
1319 struct wireless_dev *wdev)
1322 lockdep_assert_held(&rdev->wiphy.mtx);
1325 * We get here also when the interface changes network namespaces,
1326 * as it's registered into the new one, but we don't want it to
1327 * change ID in that case. Checking if the ID is already assigned
1328 * works, because 0 isn't considered a valid ID and the memory is
1331 if (!wdev->identifier)
1332 wdev->identifier = ++rdev->wdev_id;
1333 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
1334 rdev->devlist_generation++;
1335 wdev->registered = true;
1338 sysfs_create_link(&wdev->netdev->dev.kobj, &rdev->wiphy.dev.kobj,
1340 pr_err("failed to add phy80211 symlink to netdev!\n");
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 cfg80211_register_wdev(rdev, wdev);
1370 wdev->registering = false;
1372 wdev->registered = false;
1375 EXPORT_SYMBOL(cfg80211_register_netdevice);
1377 static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
1378 unsigned long state, void *ptr)
1380 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1381 struct wireless_dev *wdev = dev->ieee80211_ptr;
1382 struct cfg80211_registered_device *rdev;
1383 struct cfg80211_sched_scan_request *pos, *tmp;
1388 rdev = wiphy_to_rdev(wdev->wiphy);
1390 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
1393 case NETDEV_POST_INIT:
1394 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
1396 /* can only change netns with wiphy */
1397 dev->features |= NETIF_F_NETNS_LOCAL;
1399 cfg80211_init_wdev(wdev);
1401 case NETDEV_REGISTER:
1402 if (!wdev->registered) {
1403 wiphy_lock(&rdev->wiphy);
1404 cfg80211_register_wdev(rdev, wdev);
1405 wiphy_unlock(&rdev->wiphy);
1408 case NETDEV_UNREGISTER:
1410 * It is possible to get NETDEV_UNREGISTER multiple times,
1411 * so check wdev->registered.
1413 if (wdev->registered && !wdev->registering) {
1414 wiphy_lock(&rdev->wiphy);
1415 _cfg80211_unregister_wdev(wdev, false);
1416 wiphy_unlock(&rdev->wiphy);
1419 case NETDEV_GOING_DOWN:
1420 wiphy_lock(&rdev->wiphy);
1421 cfg80211_leave(rdev, wdev);
1422 wiphy_unlock(&rdev->wiphy);
1425 wiphy_lock(&rdev->wiphy);
1426 cfg80211_update_iface_num(rdev, wdev->iftype, -1);
1427 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
1428 if (WARN_ON(!rdev->scan_req->notified &&
1429 (!rdev->int_scan_req ||
1430 !rdev->int_scan_req->notified)))
1431 rdev->scan_req->info.aborted = true;
1432 ___cfg80211_scan_done(rdev, false);
1435 list_for_each_entry_safe(pos, tmp,
1436 &rdev->sched_scan_req_list, list) {
1437 if (WARN_ON(pos->dev == wdev->netdev))
1438 cfg80211_stop_sched_scan_req(rdev, pos, false);
1442 wiphy_unlock(&rdev->wiphy);
1443 wake_up(&rdev->dev_wait);
1446 wiphy_lock(&rdev->wiphy);
1447 cfg80211_update_iface_num(rdev, wdev->iftype, 1);
1449 switch (wdev->iftype) {
1450 #ifdef CONFIG_CFG80211_WEXT
1451 case NL80211_IFTYPE_ADHOC:
1452 cfg80211_ibss_wext_join(rdev, wdev);
1454 case NL80211_IFTYPE_STATION:
1455 cfg80211_mgd_wext_connect(rdev, wdev);
1458 #ifdef CONFIG_MAC80211_MESH
1459 case NL80211_IFTYPE_MESH_POINT:
1461 /* backward compat code... */
1462 struct mesh_setup setup;
1463 memcpy(&setup, &default_mesh_setup,
1465 /* back compat only needed for mesh_id */
1466 setup.mesh_id = wdev->ssid;
1467 setup.mesh_id_len = wdev->mesh_id_up_len;
1468 if (wdev->mesh_id_up_len)
1469 __cfg80211_join_mesh(rdev, dev,
1471 &default_mesh_config);
1482 * Configure power management to the driver here so that its
1483 * correctly set also after interface type changes etc.
1485 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1486 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
1487 rdev->ops->set_power_mgmt &&
1488 rdev_set_power_mgmt(rdev, dev, wdev->ps,
1489 wdev->ps_timeout)) {
1490 /* assume this means it's off */
1493 wiphy_unlock(&rdev->wiphy);
1496 if (!cfg80211_iftype_allowed(wdev->wiphy, wdev->iftype,
1497 wdev->use_4addr, 0))
1498 return notifier_from_errno(-EOPNOTSUPP);
1500 if (rfkill_blocked(rdev->wiphy.rfkill))
1501 return notifier_from_errno(-ERFKILL);
1507 wireless_nlevent_flush();
1512 static struct notifier_block cfg80211_netdev_notifier = {
1513 .notifier_call = cfg80211_netdev_notifier_call,
1516 static void __net_exit cfg80211_pernet_exit(struct net *net)
1518 struct cfg80211_registered_device *rdev;
1521 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1522 if (net_eq(wiphy_net(&rdev->wiphy), net))
1523 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
1528 static struct pernet_operations cfg80211_pernet_ops = {
1529 .exit = cfg80211_pernet_exit,
1532 static int __init cfg80211_init(void)
1536 err = register_pernet_device(&cfg80211_pernet_ops);
1538 goto out_fail_pernet;
1540 err = wiphy_sysfs_init();
1542 goto out_fail_sysfs;
1544 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
1546 goto out_fail_notifier;
1548 err = nl80211_init();
1550 goto out_fail_nl80211;
1552 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
1554 err = regulatory_init();
1558 cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM);
1569 debugfs_remove(ieee80211_debugfs_dir);
1572 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1576 unregister_pernet_device(&cfg80211_pernet_ops);
1580 fs_initcall(cfg80211_init);
1582 static void __exit cfg80211_exit(void)
1584 debugfs_remove(ieee80211_debugfs_dir);
1586 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1589 unregister_pernet_device(&cfg80211_pernet_ops);
1590 destroy_workqueue(cfg80211_wq);
1592 module_exit(cfg80211_exit);