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)
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)
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);
276 /* otherwise, check iftype */
277 switch (wdev->iftype) {
278 case NL80211_IFTYPE_P2P_DEVICE:
279 cfg80211_stop_p2p_device(rdev, wdev);
281 case NL80211_IFTYPE_NAN:
282 cfg80211_stop_nan(rdev, wdev);
289 EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces);
291 static int cfg80211_rfkill_set_block(void *data, bool blocked)
293 struct cfg80211_registered_device *rdev = data;
299 cfg80211_shutdown_all_interfaces(&rdev->wiphy);
305 static void cfg80211_rfkill_block_work(struct work_struct *work)
307 struct cfg80211_registered_device *rdev;
309 rdev = container_of(work, struct cfg80211_registered_device,
311 cfg80211_rfkill_set_block(rdev, true);
314 static void cfg80211_event_work(struct work_struct *work)
316 struct cfg80211_registered_device *rdev;
318 rdev = container_of(work, struct cfg80211_registered_device,
322 cfg80211_process_rdev_events(rdev);
326 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev)
328 struct wireless_dev *wdev, *tmp;
332 list_for_each_entry_safe(wdev, tmp, &rdev->wiphy.wdev_list, list) {
333 if (wdev->nl_owner_dead)
334 rdev_del_virtual_intf(rdev, wdev);
338 static void cfg80211_destroy_iface_wk(struct work_struct *work)
340 struct cfg80211_registered_device *rdev;
342 rdev = container_of(work, struct cfg80211_registered_device,
346 cfg80211_destroy_ifaces(rdev);
350 static void cfg80211_sched_scan_stop_wk(struct work_struct *work)
352 struct cfg80211_registered_device *rdev;
353 struct cfg80211_sched_scan_request *req, *tmp;
355 rdev = container_of(work, struct cfg80211_registered_device,
359 list_for_each_entry_safe(req, tmp, &rdev->sched_scan_req_list, list) {
360 if (req->nl_owner_dead)
361 cfg80211_stop_sched_scan_req(rdev, req, false);
366 static void cfg80211_propagate_radar_detect_wk(struct work_struct *work)
368 struct cfg80211_registered_device *rdev;
370 rdev = container_of(work, struct cfg80211_registered_device,
371 propagate_radar_detect_wk);
375 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->radar_chandef,
376 NL80211_DFS_UNAVAILABLE,
377 NL80211_RADAR_DETECTED);
382 static void cfg80211_propagate_cac_done_wk(struct work_struct *work)
384 struct cfg80211_registered_device *rdev;
386 rdev = container_of(work, struct cfg80211_registered_device,
387 propagate_cac_done_wk);
391 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->cac_done_chandef,
392 NL80211_DFS_AVAILABLE,
393 NL80211_RADAR_CAC_FINISHED);
398 /* exported functions */
400 struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv,
401 const char *requested_name)
403 static atomic_t wiphy_counter = ATOMIC_INIT(0);
405 struct cfg80211_registered_device *rdev;
408 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
409 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
410 WARN_ON(ops->connect && !ops->disconnect);
411 WARN_ON(ops->join_ibss && !ops->leave_ibss);
412 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
413 WARN_ON(ops->add_station && !ops->del_station);
414 WARN_ON(ops->add_mpath && !ops->del_mpath);
415 WARN_ON(ops->join_mesh && !ops->leave_mesh);
416 WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device);
417 WARN_ON(ops->start_ap && !ops->stop_ap);
418 WARN_ON(ops->join_ocb && !ops->leave_ocb);
419 WARN_ON(ops->suspend && !ops->resume);
420 WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop);
421 WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel);
422 WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch);
423 WARN_ON(ops->add_tx_ts && !ops->del_tx_ts);
425 alloc_size = sizeof(*rdev) + sizeof_priv;
427 rdev = kzalloc(alloc_size, GFP_KERNEL);
433 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter);
435 if (unlikely(rdev->wiphy_idx < 0)) {
437 atomic_dec(&wiphy_counter);
442 /* atomic_inc_return makes it start at 1, make it start at 0 */
445 /* give it a proper name */
446 if (requested_name && requested_name[0]) {
450 rv = cfg80211_dev_check_name(rdev, requested_name);
454 goto use_default_name;
457 rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name);
460 goto use_default_name;
465 /* NOTE: This is *probably* safe w/out holding rtnl because of
466 * the restrictions on phy names. Probably this call could
467 * fail if some other part of the kernel (re)named a device
468 * phyX. But, might should add some locking and check return
469 * value, and use a different name if this one exists?
471 rv = dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
478 INIT_LIST_HEAD(&rdev->wiphy.wdev_list);
479 INIT_LIST_HEAD(&rdev->beacon_registrations);
480 spin_lock_init(&rdev->beacon_registrations_lock);
481 spin_lock_init(&rdev->bss_lock);
482 INIT_LIST_HEAD(&rdev->bss_list);
483 INIT_LIST_HEAD(&rdev->sched_scan_req_list);
484 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
485 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk,
486 cfg80211_dfs_channels_update_work);
487 #ifdef CONFIG_CFG80211_WEXT
488 rdev->wiphy.wext = &cfg80211_wext_handler;
491 device_initialize(&rdev->wiphy.dev);
492 rdev->wiphy.dev.class = &ieee80211_class;
493 rdev->wiphy.dev.platform_data = rdev;
494 device_enable_async_suspend(&rdev->wiphy.dev);
496 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk);
497 INIT_WORK(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk);
498 INIT_WORK(&rdev->sched_scan_res_wk, cfg80211_sched_scan_results_wk);
499 INIT_WORK(&rdev->propagate_radar_detect_wk,
500 cfg80211_propagate_radar_detect_wk);
501 INIT_WORK(&rdev->propagate_cac_done_wk, cfg80211_propagate_cac_done_wk);
502 INIT_WORK(&rdev->mgmt_registrations_update_wk,
503 cfg80211_mgmt_registrations_update_wk);
505 #ifdef CONFIG_CFG80211_DEFAULT_PS
506 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
509 wiphy_net_set(&rdev->wiphy, &init_net);
511 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
512 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
513 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
514 &rdev->rfkill_ops, rdev);
517 wiphy_free(&rdev->wiphy);
521 INIT_WORK(&rdev->rfkill_block, cfg80211_rfkill_block_work);
522 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
523 INIT_WORK(&rdev->event_work, cfg80211_event_work);
525 init_waitqueue_head(&rdev->dev_wait);
528 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
529 * Fragmentation and RTS threshold are disabled by default with the
532 rdev->wiphy.retry_short = 7;
533 rdev->wiphy.retry_long = 4;
534 rdev->wiphy.frag_threshold = (u32) -1;
535 rdev->wiphy.rts_threshold = (u32) -1;
536 rdev->wiphy.coverage_class = 0;
538 rdev->wiphy.max_num_csa_counters = 1;
540 rdev->wiphy.max_sched_scan_plans = 1;
541 rdev->wiphy.max_sched_scan_plan_interval = U32_MAX;
545 EXPORT_SYMBOL(wiphy_new_nm);
547 static int wiphy_verify_combinations(struct wiphy *wiphy)
549 const struct ieee80211_iface_combination *c;
552 for (i = 0; i < wiphy->n_iface_combinations; i++) {
556 c = &wiphy->iface_combinations[i];
559 * Combinations with just one interface aren't real,
560 * however we make an exception for DFS.
562 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths))
565 /* Need at least one channel */
566 if (WARN_ON(!c->num_different_channels))
570 * Put a sane limit on maximum number of different
571 * channels to simplify channel accounting code.
573 if (WARN_ON(c->num_different_channels >
574 CFG80211_MAX_NUM_DIFFERENT_CHANNELS))
577 /* DFS only works on one channel. */
578 if (WARN_ON(c->radar_detect_widths &&
579 (c->num_different_channels > 1)))
582 if (WARN_ON(!c->n_limits))
585 for (j = 0; j < c->n_limits; j++) {
586 u16 types = c->limits[j].types;
588 /* interface types shouldn't overlap */
589 if (WARN_ON(types & all_iftypes))
591 all_iftypes |= types;
593 if (WARN_ON(!c->limits[j].max))
596 /* Shouldn't list software iftypes in combinations! */
597 if (WARN_ON(wiphy->software_iftypes & types))
600 /* Only a single P2P_DEVICE can be allowed */
601 if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) &&
602 c->limits[j].max > 1))
605 /* Only a single NAN can be allowed */
606 if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) &&
607 c->limits[j].max > 1))
611 * This isn't well-defined right now. If you have an
612 * IBSS interface, then its beacon interval may change
613 * by joining other networks, and nothing prevents it
615 * So technically we probably shouldn't even allow AP
616 * and IBSS in the same interface, but it seems that
617 * some drivers support that, possibly only with fixed
618 * beacon intervals for IBSS.
620 if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) &&
621 c->beacon_int_min_gcd)) {
625 cnt += c->limits[j].max;
627 * Don't advertise an unsupported type
630 if (WARN_ON((wiphy->interface_modes & types) != types))
634 #ifndef CONFIG_WIRELESS_WDS
635 if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS)))
639 /* You can't even choose that many! */
640 if (WARN_ON(cnt < c->max_interfaces))
647 int wiphy_register(struct wiphy *wiphy)
649 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
651 enum nl80211_band band;
652 struct ieee80211_supported_band *sband;
653 bool have_band = false;
655 u16 ifmodes = wiphy->interface_modes;
658 if (WARN_ON(wiphy->wowlan &&
659 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
660 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
662 if (WARN_ON(wiphy->wowlan &&
663 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns &&
664 !wiphy->wowlan->tcp))
667 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
668 (!rdev->ops->tdls_channel_switch ||
669 !rdev->ops->tdls_cancel_channel_switch)))
672 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) &&
673 (!rdev->ops->start_nan || !rdev->ops->stop_nan ||
674 !rdev->ops->add_nan_func || !rdev->ops->del_nan_func ||
675 !(wiphy->nan_supported_bands & BIT(NL80211_BAND_2GHZ)))))
678 #ifndef CONFIG_WIRELESS_WDS
679 if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)))
683 if (WARN_ON(wiphy->pmsr_capa && !wiphy->pmsr_capa->ftm.supported))
686 if (wiphy->pmsr_capa && wiphy->pmsr_capa->ftm.supported) {
687 if (WARN_ON(!wiphy->pmsr_capa->ftm.asap &&
688 !wiphy->pmsr_capa->ftm.non_asap))
690 if (WARN_ON(!wiphy->pmsr_capa->ftm.preambles ||
691 !wiphy->pmsr_capa->ftm.bandwidths))
693 if (WARN_ON(wiphy->pmsr_capa->ftm.preambles &
694 ~(BIT(NL80211_PREAMBLE_LEGACY) |
695 BIT(NL80211_PREAMBLE_HT) |
696 BIT(NL80211_PREAMBLE_VHT) |
697 BIT(NL80211_PREAMBLE_HE) |
698 BIT(NL80211_PREAMBLE_DMG))))
700 if (WARN_ON((wiphy->pmsr_capa->ftm.trigger_based ||
701 wiphy->pmsr_capa->ftm.non_trigger_based) &&
702 !(wiphy->pmsr_capa->ftm.preambles &
703 BIT(NL80211_PREAMBLE_HE))))
705 if (WARN_ON(wiphy->pmsr_capa->ftm.bandwidths &
706 ~(BIT(NL80211_CHAN_WIDTH_20_NOHT) |
707 BIT(NL80211_CHAN_WIDTH_20) |
708 BIT(NL80211_CHAN_WIDTH_40) |
709 BIT(NL80211_CHAN_WIDTH_80) |
710 BIT(NL80211_CHAN_WIDTH_80P80) |
711 BIT(NL80211_CHAN_WIDTH_160) |
712 BIT(NL80211_CHAN_WIDTH_5) |
713 BIT(NL80211_CHAN_WIDTH_10))))
718 * if a wiphy has unsupported modes for regulatory channel enforcement,
719 * opt-out of enforcement checking
721 if (wiphy->interface_modes & ~(BIT(NL80211_IFTYPE_STATION) |
722 BIT(NL80211_IFTYPE_P2P_CLIENT) |
723 BIT(NL80211_IFTYPE_AP) |
724 BIT(NL80211_IFTYPE_P2P_GO) |
725 BIT(NL80211_IFTYPE_ADHOC) |
726 BIT(NL80211_IFTYPE_P2P_DEVICE) |
727 BIT(NL80211_IFTYPE_NAN) |
728 BIT(NL80211_IFTYPE_AP_VLAN) |
729 BIT(NL80211_IFTYPE_MONITOR)))
730 wiphy->regulatory_flags |= REGULATORY_IGNORE_STALE_KICKOFF;
732 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) &&
733 (wiphy->regulatory_flags &
734 (REGULATORY_CUSTOM_REG |
735 REGULATORY_STRICT_REG |
736 REGULATORY_COUNTRY_IE_FOLLOW_POWER |
737 REGULATORY_COUNTRY_IE_IGNORE))))
740 if (WARN_ON(wiphy->coalesce &&
741 (!wiphy->coalesce->n_rules ||
742 !wiphy->coalesce->n_patterns) &&
743 (!wiphy->coalesce->pattern_min_len ||
744 wiphy->coalesce->pattern_min_len >
745 wiphy->coalesce->pattern_max_len)))
748 if (WARN_ON(wiphy->ap_sme_capa &&
749 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
752 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
755 if (WARN_ON(wiphy->addresses &&
756 !is_zero_ether_addr(wiphy->perm_addr) &&
757 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
761 if (WARN_ON(wiphy->max_acl_mac_addrs &&
762 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) ||
763 !rdev->ops->set_mac_acl)))
766 /* assure only valid behaviours are flagged by driver
767 * hence subtract 2 as bit 0 is invalid.
769 if (WARN_ON(wiphy->bss_select_support &&
770 (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2))))
773 if (WARN_ON(wiphy_ext_feature_isset(&rdev->wiphy,
774 NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X) &&
775 (!rdev->ops->set_pmk || !rdev->ops->del_pmk)))
778 if (WARN_ON(!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
779 rdev->ops->update_connect_params))
782 if (wiphy->addresses)
783 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
785 /* sanity check ifmodes */
787 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
788 if (WARN_ON(ifmodes != wiphy->interface_modes))
789 wiphy->interface_modes = ifmodes;
791 res = wiphy_verify_combinations(wiphy);
795 /* sanity check supported bands/channels */
796 for (band = 0; band < NUM_NL80211_BANDS; band++) {
798 bool have_he = false;
800 sband = wiphy->bands[band];
805 if (WARN_ON(!sband->n_channels))
808 * on 60GHz or sub-1Ghz band, there are no legacy rates, so
811 if (WARN_ON((band != NL80211_BAND_60GHZ &&
812 band != NL80211_BAND_S1GHZ) &&
816 if (WARN_ON(band == NL80211_BAND_6GHZ &&
817 (sband->ht_cap.ht_supported ||
818 sband->vht_cap.vht_supported)))
822 * Since cfg80211_disable_40mhz_24ghz is global, we can
823 * modify the sband's ht data even if the driver uses a
824 * global structure for that.
826 if (cfg80211_disable_40mhz_24ghz &&
827 band == NL80211_BAND_2GHZ &&
828 sband->ht_cap.ht_supported) {
829 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
830 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
834 * Since we use a u32 for rate bitmaps in
835 * ieee80211_get_response_rate, we cannot
836 * have more than 32 legacy rates.
838 if (WARN_ON(sband->n_bitrates > 32))
841 for (i = 0; i < sband->n_channels; i++) {
842 sband->channels[i].orig_flags =
843 sband->channels[i].flags;
844 sband->channels[i].orig_mag = INT_MAX;
845 sband->channels[i].orig_mpwr =
846 sband->channels[i].max_power;
847 sband->channels[i].band = band;
849 if (WARN_ON(sband->channels[i].freq_offset >= 1000))
853 for (i = 0; i < sband->n_iftype_data; i++) {
854 const struct ieee80211_sband_iftype_data *iftd;
856 iftd = &sband->iftype_data[i];
858 if (WARN_ON(!iftd->types_mask))
860 if (WARN_ON(types & iftd->types_mask))
863 /* at least one piece of information must be present */
864 if (WARN_ON(!iftd->he_cap.has_he))
867 types |= iftd->types_mask;
870 have_he = iftd->he_cap.has_he;
876 if (WARN_ON(!have_he && band == NL80211_BAND_6GHZ))
887 for (i = 0; i < rdev->wiphy.n_vendor_commands; i++) {
889 * Validate we have a policy (can be explicitly set to
890 * VENDOR_CMD_RAW_DATA which is non-NULL) and also that
891 * we have at least one of doit/dumpit.
893 if (WARN_ON(!rdev->wiphy.vendor_commands[i].policy))
895 if (WARN_ON(!rdev->wiphy.vendor_commands[i].doit &&
896 !rdev->wiphy.vendor_commands[i].dumpit))
901 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns &&
902 (!rdev->wiphy.wowlan->pattern_min_len ||
903 rdev->wiphy.wowlan->pattern_min_len >
904 rdev->wiphy.wowlan->pattern_max_len)))
908 /* check and set up bitrates */
909 ieee80211_set_bitrate_flags(wiphy);
911 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH;
914 res = device_add(&rdev->wiphy.dev);
920 /* set up regulatory info */
921 wiphy_regulatory_register(wiphy);
923 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
924 cfg80211_rdev_list_generation++;
927 rdev->wiphy.debugfsdir = debugfs_create_dir(wiphy_name(&rdev->wiphy),
928 ieee80211_debugfs_dir);
930 cfg80211_debugfs_rdev_add(rdev);
931 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
933 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
934 struct regulatory_request request;
936 request.wiphy_idx = get_wiphy_idx(wiphy);
937 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
938 request.alpha2[0] = '9';
939 request.alpha2[1] = '9';
941 nl80211_send_reg_change_event(&request);
944 /* Check that nobody globally advertises any capabilities they do not
945 * advertise on all possible interface types.
947 if (wiphy->extended_capabilities_len &&
948 wiphy->num_iftype_ext_capab &&
949 wiphy->iftype_ext_capab) {
950 u8 supported_on_all, j;
951 const struct wiphy_iftype_ext_capab *capab;
953 capab = wiphy->iftype_ext_capab;
954 for (j = 0; j < wiphy->extended_capabilities_len; j++) {
955 if (capab[0].extended_capabilities_len > j)
957 capab[0].extended_capabilities[j];
959 supported_on_all = 0x00;
960 for (i = 1; i < wiphy->num_iftype_ext_capab; i++) {
961 if (j >= capab[i].extended_capabilities_len) {
962 supported_on_all = 0x00;
966 capab[i].extended_capabilities[j];
968 if (WARN_ON(wiphy->extended_capabilities[j] &
974 rdev->wiphy.registered = true;
977 res = rfkill_register(rdev->rfkill);
979 rfkill_destroy(rdev->rfkill);
981 wiphy_unregister(&rdev->wiphy);
987 EXPORT_SYMBOL(wiphy_register);
989 void wiphy_rfkill_start_polling(struct wiphy *wiphy)
991 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
993 if (!rdev->ops->rfkill_poll)
995 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
996 rfkill_resume_polling(rdev->rfkill);
998 EXPORT_SYMBOL(wiphy_rfkill_start_polling);
1000 void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
1002 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1004 rfkill_pause_polling(rdev->rfkill);
1006 EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
1008 void wiphy_unregister(struct wiphy *wiphy)
1010 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1012 wait_event(rdev->dev_wait, ({
1015 __count = rdev->opencount;
1020 rfkill_unregister(rdev->rfkill);
1023 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
1024 rdev->wiphy.registered = false;
1026 WARN_ON(!list_empty(&rdev->wiphy.wdev_list));
1029 * First remove the hardware from everywhere, this makes
1030 * it impossible to find from userspace.
1032 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
1033 list_del_rcu(&rdev->list);
1037 * If this device got a regulatory hint tell core its
1038 * free to listen now to a new shiny device regulatory hint
1040 wiphy_regulatory_deregister(wiphy);
1042 cfg80211_rdev_list_generation++;
1043 device_del(&rdev->wiphy.dev);
1047 flush_work(&rdev->scan_done_wk);
1048 cancel_work_sync(&rdev->conn_work);
1049 flush_work(&rdev->event_work);
1050 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
1051 flush_work(&rdev->destroy_work);
1052 flush_work(&rdev->sched_scan_stop_wk);
1053 flush_work(&rdev->propagate_radar_detect_wk);
1054 flush_work(&rdev->propagate_cac_done_wk);
1055 flush_work(&rdev->mgmt_registrations_update_wk);
1058 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
1059 rdev_set_wakeup(rdev, false);
1061 cfg80211_rdev_free_wowlan(rdev);
1062 cfg80211_rdev_free_coalesce(rdev);
1064 EXPORT_SYMBOL(wiphy_unregister);
1066 void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
1068 struct cfg80211_internal_bss *scan, *tmp;
1069 struct cfg80211_beacon_registration *reg, *treg;
1070 rfkill_destroy(rdev->rfkill);
1071 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
1072 list_del(®->list);
1075 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
1076 cfg80211_put_bss(&rdev->wiphy, &scan->pub);
1080 void wiphy_free(struct wiphy *wiphy)
1082 put_device(&wiphy->dev);
1084 EXPORT_SYMBOL(wiphy_free);
1086 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
1088 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1090 if (rfkill_set_hw_state(rdev->rfkill, blocked))
1091 schedule_work(&rdev->rfkill_block);
1093 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
1095 void cfg80211_cqm_config_free(struct wireless_dev *wdev)
1097 kfree(wdev->cqm_config);
1098 wdev->cqm_config = NULL;
1101 static void __cfg80211_unregister_wdev(struct wireless_dev *wdev, bool sync)
1103 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1107 flush_work(&wdev->pmsr_free_wk);
1109 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE);
1111 list_del_rcu(&wdev->list);
1114 rdev->devlist_generation++;
1116 cfg80211_mlme_purge_registrations(wdev);
1118 switch (wdev->iftype) {
1119 case NL80211_IFTYPE_P2P_DEVICE:
1120 cfg80211_stop_p2p_device(rdev, wdev);
1122 case NL80211_IFTYPE_NAN:
1123 cfg80211_stop_nan(rdev, wdev);
1129 #ifdef CONFIG_CFG80211_WEXT
1130 kfree_sensitive(wdev->wext.keys);
1131 wdev->wext.keys = NULL;
1133 /* only initialized if we have a netdev */
1135 flush_work(&wdev->disconnect_wk);
1137 cfg80211_cqm_config_free(wdev);
1140 void cfg80211_unregister_wdev(struct wireless_dev *wdev)
1142 if (WARN_ON(wdev->netdev))
1145 __cfg80211_unregister_wdev(wdev, true);
1147 EXPORT_SYMBOL(cfg80211_unregister_wdev);
1149 static const struct device_type wiphy_type = {
1153 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
1154 enum nl80211_iftype iftype, int num)
1158 rdev->num_running_ifaces += num;
1159 if (iftype == NL80211_IFTYPE_MONITOR)
1160 rdev->num_running_monitor_ifaces += num;
1163 void __cfg80211_leave(struct cfg80211_registered_device *rdev,
1164 struct wireless_dev *wdev)
1166 struct net_device *dev = wdev->netdev;
1167 struct cfg80211_sched_scan_request *pos, *tmp;
1170 ASSERT_WDEV_LOCK(wdev);
1172 cfg80211_pmsr_wdev_down(wdev);
1174 switch (wdev->iftype) {
1175 case NL80211_IFTYPE_ADHOC:
1176 __cfg80211_leave_ibss(rdev, dev, true);
1178 case NL80211_IFTYPE_P2P_CLIENT:
1179 case NL80211_IFTYPE_STATION:
1180 list_for_each_entry_safe(pos, tmp, &rdev->sched_scan_req_list,
1182 if (dev == pos->dev)
1183 cfg80211_stop_sched_scan_req(rdev, pos, false);
1186 #ifdef CONFIG_CFG80211_WEXT
1187 kfree(wdev->wext.ie);
1188 wdev->wext.ie = NULL;
1189 wdev->wext.ie_len = 0;
1190 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1192 cfg80211_disconnect(rdev, dev,
1193 WLAN_REASON_DEAUTH_LEAVING, true);
1195 case NL80211_IFTYPE_MESH_POINT:
1196 __cfg80211_leave_mesh(rdev, dev);
1198 case NL80211_IFTYPE_AP:
1199 case NL80211_IFTYPE_P2P_GO:
1200 __cfg80211_stop_ap(rdev, dev, true);
1202 case NL80211_IFTYPE_OCB:
1203 __cfg80211_leave_ocb(rdev, dev);
1205 case NL80211_IFTYPE_WDS:
1206 /* must be handled by mac80211/driver, has no APIs */
1208 case NL80211_IFTYPE_P2P_DEVICE:
1209 case NL80211_IFTYPE_NAN:
1210 /* cannot happen, has no netdev */
1212 case NL80211_IFTYPE_AP_VLAN:
1213 case NL80211_IFTYPE_MONITOR:
1216 case NL80211_IFTYPE_UNSPECIFIED:
1217 case NUM_NL80211_IFTYPES:
1223 void cfg80211_leave(struct cfg80211_registered_device *rdev,
1224 struct wireless_dev *wdev)
1227 __cfg80211_leave(rdev, wdev);
1231 void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev,
1234 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1235 struct cfg80211_event *ev;
1236 unsigned long flags;
1238 trace_cfg80211_stop_iface(wiphy, wdev);
1240 ev = kzalloc(sizeof(*ev), gfp);
1244 ev->type = EVENT_STOPPED;
1246 spin_lock_irqsave(&wdev->event_lock, flags);
1247 list_add_tail(&ev->list, &wdev->event_list);
1248 spin_unlock_irqrestore(&wdev->event_lock, flags);
1249 queue_work(cfg80211_wq, &rdev->event_work);
1251 EXPORT_SYMBOL(cfg80211_stop_iface);
1253 void cfg80211_init_wdev(struct wireless_dev *wdev)
1255 mutex_init(&wdev->mtx);
1256 INIT_LIST_HEAD(&wdev->event_list);
1257 spin_lock_init(&wdev->event_lock);
1258 INIT_LIST_HEAD(&wdev->mgmt_registrations);
1259 spin_lock_init(&wdev->mgmt_registrations_lock);
1260 INIT_LIST_HEAD(&wdev->pmsr_list);
1261 spin_lock_init(&wdev->pmsr_lock);
1262 INIT_WORK(&wdev->pmsr_free_wk, cfg80211_pmsr_free_wk);
1264 #ifdef CONFIG_CFG80211_WEXT
1265 wdev->wext.default_key = -1;
1266 wdev->wext.default_mgmt_key = -1;
1267 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1270 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
1274 /* allow mac80211 to determine the timeout */
1275 wdev->ps_timeout = -1;
1277 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1278 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
1279 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
1280 wdev->netdev->priv_flags |= IFF_DONT_BRIDGE;
1282 INIT_WORK(&wdev->disconnect_wk, cfg80211_autodisconnect_wk);
1285 void cfg80211_register_wdev(struct cfg80211_registered_device *rdev,
1286 struct wireless_dev *wdev)
1289 * We get here also when the interface changes network namespaces,
1290 * as it's registered into the new one, but we don't want it to
1291 * change ID in that case. Checking if the ID is already assigned
1292 * works, because 0 isn't considered a valid ID and the memory is
1295 if (!wdev->identifier)
1296 wdev->identifier = ++rdev->wdev_id;
1297 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
1298 rdev->devlist_generation++;
1300 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
1303 static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
1304 unsigned long state, void *ptr)
1306 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1307 struct wireless_dev *wdev = dev->ieee80211_ptr;
1308 struct cfg80211_registered_device *rdev;
1309 struct cfg80211_sched_scan_request *pos, *tmp;
1314 rdev = wiphy_to_rdev(wdev->wiphy);
1316 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
1319 case NETDEV_POST_INIT:
1320 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
1322 /* can only change netns with wiphy */
1323 dev->features |= NETIF_F_NETNS_LOCAL;
1325 cfg80211_init_wdev(wdev);
1327 case NETDEV_REGISTER:
1329 * NB: cannot take rdev->mtx here because this may be
1330 * called within code protected by it when interfaces
1331 * are added with nl80211.
1333 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
1335 pr_err("failed to add phy80211 symlink to netdev!\n");
1338 cfg80211_register_wdev(rdev, wdev);
1340 case NETDEV_GOING_DOWN:
1341 cfg80211_leave(rdev, wdev);
1344 cfg80211_update_iface_num(rdev, wdev->iftype, -1);
1345 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
1346 if (WARN_ON(!rdev->scan_req->notified &&
1347 (!rdev->int_scan_req ||
1348 !rdev->int_scan_req->notified)))
1349 rdev->scan_req->info.aborted = true;
1350 ___cfg80211_scan_done(rdev, false);
1353 list_for_each_entry_safe(pos, tmp,
1354 &rdev->sched_scan_req_list, list) {
1355 if (WARN_ON(pos->dev == wdev->netdev))
1356 cfg80211_stop_sched_scan_req(rdev, pos, false);
1360 wake_up(&rdev->dev_wait);
1363 cfg80211_update_iface_num(rdev, wdev->iftype, 1);
1365 switch (wdev->iftype) {
1366 #ifdef CONFIG_CFG80211_WEXT
1367 case NL80211_IFTYPE_ADHOC:
1368 cfg80211_ibss_wext_join(rdev, wdev);
1370 case NL80211_IFTYPE_STATION:
1371 cfg80211_mgd_wext_connect(rdev, wdev);
1374 #ifdef CONFIG_MAC80211_MESH
1375 case NL80211_IFTYPE_MESH_POINT:
1377 /* backward compat code... */
1378 struct mesh_setup setup;
1379 memcpy(&setup, &default_mesh_setup,
1381 /* back compat only needed for mesh_id */
1382 setup.mesh_id = wdev->ssid;
1383 setup.mesh_id_len = wdev->mesh_id_up_len;
1384 if (wdev->mesh_id_up_len)
1385 __cfg80211_join_mesh(rdev, dev,
1387 &default_mesh_config);
1398 * Configure power management to the driver here so that its
1399 * correctly set also after interface type changes etc.
1401 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1402 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
1403 rdev->ops->set_power_mgmt &&
1404 rdev_set_power_mgmt(rdev, dev, wdev->ps,
1405 wdev->ps_timeout)) {
1406 /* assume this means it's off */
1410 case NETDEV_UNREGISTER:
1412 * It is possible to get NETDEV_UNREGISTER
1413 * multiple times. To detect that, check
1414 * that the interface is still on the list
1415 * of registered interfaces, and only then
1416 * remove and clean it up.
1418 if (!list_empty(&wdev->list)) {
1419 __cfg80211_unregister_wdev(wdev, false);
1420 sysfs_remove_link(&dev->dev.kobj, "phy80211");
1423 * synchronise (so that we won't find this netdev
1424 * from other code any more) and then clear the list
1425 * head so that the above code can safely check for
1426 * !list_empty() to avoid double-cleanup.
1429 INIT_LIST_HEAD(&wdev->list);
1431 * Ensure that all events have been processed and
1434 cfg80211_process_wdev_events(wdev);
1436 if (WARN_ON(wdev->current_bss)) {
1437 cfg80211_unhold_bss(wdev->current_bss);
1438 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
1439 wdev->current_bss = NULL;
1443 if (!cfg80211_iftype_allowed(wdev->wiphy, wdev->iftype,
1444 wdev->use_4addr, 0))
1445 return notifier_from_errno(-EOPNOTSUPP);
1447 if (rfkill_blocked(rdev->rfkill))
1448 return notifier_from_errno(-ERFKILL);
1454 wireless_nlevent_flush();
1459 static struct notifier_block cfg80211_netdev_notifier = {
1460 .notifier_call = cfg80211_netdev_notifier_call,
1463 static void __net_exit cfg80211_pernet_exit(struct net *net)
1465 struct cfg80211_registered_device *rdev;
1468 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1469 if (net_eq(wiphy_net(&rdev->wiphy), net))
1470 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
1475 static struct pernet_operations cfg80211_pernet_ops = {
1476 .exit = cfg80211_pernet_exit,
1479 static int __init cfg80211_init(void)
1483 err = register_pernet_device(&cfg80211_pernet_ops);
1485 goto out_fail_pernet;
1487 err = wiphy_sysfs_init();
1489 goto out_fail_sysfs;
1491 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
1493 goto out_fail_notifier;
1495 err = nl80211_init();
1497 goto out_fail_nl80211;
1499 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
1501 err = regulatory_init();
1505 cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM);
1516 debugfs_remove(ieee80211_debugfs_dir);
1519 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1523 unregister_pernet_device(&cfg80211_pernet_ops);
1527 fs_initcall(cfg80211_init);
1529 static void __exit cfg80211_exit(void)
1531 debugfs_remove(ieee80211_debugfs_dir);
1533 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1536 unregister_pernet_device(&cfg80211_pernet_ops);
1537 destroy_workqueue(cfg80211_wq);
1539 module_exit(cfg80211_exit);