2 * This is the linux wireless configuration interface.
4 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
5 * Copyright 2013-2014 Intel Mobile Communications GmbH
6 * Copyright 2015-2017 Intel Deutschland GmbH
7 * Copyright (C) 2018 Intel Corporation
10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
13 #include <linux/module.h>
14 #include <linux/err.h>
15 #include <linux/list.h>
16 #include <linux/slab.h>
17 #include <linux/nl80211.h>
18 #include <linux/debugfs.h>
19 #include <linux/notifier.h>
20 #include <linux/device.h>
21 #include <linux/etherdevice.h>
22 #include <linux/rtnetlink.h>
23 #include <linux/sched.h>
24 #include <net/genetlink.h>
25 #include <net/cfg80211.h>
30 #include "wext-compat.h"
33 /* name for sysfs, %d is appended */
34 #define PHY_NAME "phy"
36 MODULE_AUTHOR("Johannes Berg");
37 MODULE_LICENSE("GPL");
38 MODULE_DESCRIPTION("wireless configuration support");
39 MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME);
41 /* RCU-protected (and RTNL for writers) */
42 LIST_HEAD(cfg80211_rdev_list);
43 int cfg80211_rdev_list_generation;
46 static struct dentry *ieee80211_debugfs_dir;
48 /* for the cleanup, scan and event works */
49 struct workqueue_struct *cfg80211_wq;
51 static bool cfg80211_disable_40mhz_24ghz;
52 module_param(cfg80211_disable_40mhz_24ghz, bool, 0644);
53 MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz,
54 "Disable 40MHz support in the 2.4GHz band");
56 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
58 struct cfg80211_registered_device *result = NULL, *rdev;
62 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
63 if (rdev->wiphy_idx == wiphy_idx) {
72 int get_wiphy_idx(struct wiphy *wiphy)
74 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
76 return rdev->wiphy_idx;
79 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
81 struct cfg80211_registered_device *rdev;
85 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
91 static int cfg80211_dev_check_name(struct cfg80211_registered_device *rdev,
94 struct cfg80211_registered_device *rdev2;
95 int wiphy_idx, taken = -1, digits;
99 if (strlen(newname) > NL80211_WIPHY_NAME_MAXLEN)
102 /* prohibit calling the thing phy%d when %d is not its number */
103 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
104 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
105 /* count number of places needed to print wiphy_idx */
107 while (wiphy_idx /= 10)
110 * deny the name if it is phy<idx> where <idx> is printed
111 * without leading zeroes. taken == strlen(newname) here
113 if (taken == strlen(PHY_NAME) + digits)
117 /* Ensure another device does not already have this name. */
118 list_for_each_entry(rdev2, &cfg80211_rdev_list, list)
119 if (strcmp(newname, wiphy_name(&rdev2->wiphy)) == 0)
125 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
132 /* Ignore nop renames */
133 if (strcmp(newname, wiphy_name(&rdev->wiphy)) == 0)
136 result = cfg80211_dev_check_name(rdev, newname);
140 result = device_rename(&rdev->wiphy.dev, newname);
144 if (rdev->wiphy.debugfsdir &&
145 !debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
146 rdev->wiphy.debugfsdir,
147 rdev->wiphy.debugfsdir->d_parent,
149 pr_err("failed to rename debugfs dir to %s!\n", newname);
151 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
156 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
159 struct wireless_dev *wdev;
162 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK))
165 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
168 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
169 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
172 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
176 /* failed -- clean up to old netns */
177 net = wiphy_net(&rdev->wiphy);
179 list_for_each_entry_continue_reverse(wdev,
180 &rdev->wiphy.wdev_list,
184 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
185 err = dev_change_net_namespace(wdev->netdev, net,
188 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
194 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
197 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE);
199 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
201 wiphy_net_set(&rdev->wiphy, net);
203 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev));
206 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
207 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
210 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
216 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
218 struct cfg80211_registered_device *rdev = data;
220 rdev_rfkill_poll(rdev);
223 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
224 struct wireless_dev *wdev)
228 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE))
231 if (!wdev_running(wdev))
234 rdev_stop_p2p_device(rdev, wdev);
235 wdev->is_running = false;
239 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
240 if (WARN_ON(!rdev->scan_req->notified))
241 rdev->scan_req->info.aborted = true;
242 ___cfg80211_scan_done(rdev, false);
246 void cfg80211_stop_nan(struct cfg80211_registered_device *rdev,
247 struct wireless_dev *wdev)
251 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_NAN))
254 if (!wdev_running(wdev))
257 rdev_stop_nan(rdev, wdev);
258 wdev->is_running = false;
263 void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy)
265 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
266 struct wireless_dev *wdev;
270 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
272 dev_close(wdev->netdev);
275 /* otherwise, check iftype */
276 switch (wdev->iftype) {
277 case NL80211_IFTYPE_P2P_DEVICE:
278 cfg80211_stop_p2p_device(rdev, wdev);
280 case NL80211_IFTYPE_NAN:
281 cfg80211_stop_nan(rdev, wdev);
288 EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces);
290 static int cfg80211_rfkill_set_block(void *data, bool blocked)
292 struct cfg80211_registered_device *rdev = data;
298 cfg80211_shutdown_all_interfaces(&rdev->wiphy);
304 static void cfg80211_rfkill_sync_work(struct work_struct *work)
306 struct cfg80211_registered_device *rdev;
308 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync);
309 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
312 static void cfg80211_event_work(struct work_struct *work)
314 struct cfg80211_registered_device *rdev;
316 rdev = container_of(work, struct cfg80211_registered_device,
320 cfg80211_process_rdev_events(rdev);
324 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev)
326 struct wireless_dev *wdev, *tmp;
330 list_for_each_entry_safe(wdev, tmp, &rdev->wiphy.wdev_list, list) {
331 if (wdev->nl_owner_dead)
332 rdev_del_virtual_intf(rdev, wdev);
336 static void cfg80211_destroy_iface_wk(struct work_struct *work)
338 struct cfg80211_registered_device *rdev;
340 rdev = container_of(work, struct cfg80211_registered_device,
344 cfg80211_destroy_ifaces(rdev);
348 static void cfg80211_sched_scan_stop_wk(struct work_struct *work)
350 struct cfg80211_registered_device *rdev;
351 struct cfg80211_sched_scan_request *req, *tmp;
353 rdev = container_of(work, struct cfg80211_registered_device,
357 list_for_each_entry_safe(req, tmp, &rdev->sched_scan_req_list, list) {
358 if (req->nl_owner_dead)
359 cfg80211_stop_sched_scan_req(rdev, req, false);
364 static void cfg80211_propagate_radar_detect_wk(struct work_struct *work)
366 struct cfg80211_registered_device *rdev;
368 rdev = container_of(work, struct cfg80211_registered_device,
369 propagate_radar_detect_wk);
373 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->radar_chandef,
374 NL80211_DFS_UNAVAILABLE,
375 NL80211_RADAR_DETECTED);
380 static void cfg80211_propagate_cac_done_wk(struct work_struct *work)
382 struct cfg80211_registered_device *rdev;
384 rdev = container_of(work, struct cfg80211_registered_device,
385 propagate_cac_done_wk);
389 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->cac_done_chandef,
390 NL80211_DFS_AVAILABLE,
391 NL80211_RADAR_CAC_FINISHED);
396 /* exported functions */
398 struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv,
399 const char *requested_name)
401 static atomic_t wiphy_counter = ATOMIC_INIT(0);
403 struct cfg80211_registered_device *rdev;
406 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
407 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
408 WARN_ON(ops->connect && !ops->disconnect);
409 WARN_ON(ops->join_ibss && !ops->leave_ibss);
410 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
411 WARN_ON(ops->add_station && !ops->del_station);
412 WARN_ON(ops->add_mpath && !ops->del_mpath);
413 WARN_ON(ops->join_mesh && !ops->leave_mesh);
414 WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device);
415 WARN_ON(ops->start_ap && !ops->stop_ap);
416 WARN_ON(ops->join_ocb && !ops->leave_ocb);
417 WARN_ON(ops->suspend && !ops->resume);
418 WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop);
419 WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel);
420 WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch);
421 WARN_ON(ops->add_tx_ts && !ops->del_tx_ts);
423 alloc_size = sizeof(*rdev) + sizeof_priv;
425 rdev = kzalloc(alloc_size, GFP_KERNEL);
431 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter);
433 if (unlikely(rdev->wiphy_idx < 0)) {
435 atomic_dec(&wiphy_counter);
440 /* atomic_inc_return makes it start at 1, make it start at 0 */
443 /* give it a proper name */
444 if (requested_name && requested_name[0]) {
448 rv = cfg80211_dev_check_name(rdev, requested_name);
452 goto use_default_name;
455 rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name);
458 goto use_default_name;
463 /* NOTE: This is *probably* safe w/out holding rtnl because of
464 * the restrictions on phy names. Probably this call could
465 * fail if some other part of the kernel (re)named a device
466 * phyX. But, might should add some locking and check return
467 * value, and use a different name if this one exists?
469 rv = dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
476 INIT_LIST_HEAD(&rdev->wiphy.wdev_list);
477 INIT_LIST_HEAD(&rdev->beacon_registrations);
478 spin_lock_init(&rdev->beacon_registrations_lock);
479 spin_lock_init(&rdev->bss_lock);
480 INIT_LIST_HEAD(&rdev->bss_list);
481 INIT_LIST_HEAD(&rdev->sched_scan_req_list);
482 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
483 INIT_LIST_HEAD(&rdev->mlme_unreg);
484 spin_lock_init(&rdev->mlme_unreg_lock);
485 INIT_WORK(&rdev->mlme_unreg_wk, cfg80211_mlme_unreg_wk);
486 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk,
487 cfg80211_dfs_channels_update_work);
488 #ifdef CONFIG_CFG80211_WEXT
489 rdev->wiphy.wext = &cfg80211_wext_handler;
492 device_initialize(&rdev->wiphy.dev);
493 rdev->wiphy.dev.class = &ieee80211_class;
494 rdev->wiphy.dev.platform_data = rdev;
495 device_enable_async_suspend(&rdev->wiphy.dev);
497 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk);
498 INIT_WORK(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk);
499 INIT_WORK(&rdev->sched_scan_res_wk, cfg80211_sched_scan_results_wk);
500 INIT_WORK(&rdev->propagate_radar_detect_wk,
501 cfg80211_propagate_radar_detect_wk);
502 INIT_WORK(&rdev->propagate_cac_done_wk, cfg80211_propagate_cac_done_wk);
504 #ifdef CONFIG_CFG80211_DEFAULT_PS
505 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
508 wiphy_net_set(&rdev->wiphy, &init_net);
510 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
511 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
512 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
513 &rdev->rfkill_ops, rdev);
520 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
521 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
522 INIT_WORK(&rdev->event_work, cfg80211_event_work);
524 init_waitqueue_head(&rdev->dev_wait);
527 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
528 * Fragmentation and RTS threshold are disabled by default with the
531 rdev->wiphy.retry_short = 7;
532 rdev->wiphy.retry_long = 4;
533 rdev->wiphy.frag_threshold = (u32) -1;
534 rdev->wiphy.rts_threshold = (u32) -1;
535 rdev->wiphy.coverage_class = 0;
537 rdev->wiphy.max_num_csa_counters = 1;
539 rdev->wiphy.max_sched_scan_plans = 1;
540 rdev->wiphy.max_sched_scan_plan_interval = U32_MAX;
544 EXPORT_SYMBOL(wiphy_new_nm);
546 static int wiphy_verify_combinations(struct wiphy *wiphy)
548 const struct ieee80211_iface_combination *c;
551 for (i = 0; i < wiphy->n_iface_combinations; i++) {
555 c = &wiphy->iface_combinations[i];
558 * Combinations with just one interface aren't real,
559 * however we make an exception for DFS.
561 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths))
564 /* Need at least one channel */
565 if (WARN_ON(!c->num_different_channels))
569 * Put a sane limit on maximum number of different
570 * channels to simplify channel accounting code.
572 if (WARN_ON(c->num_different_channels >
573 CFG80211_MAX_NUM_DIFFERENT_CHANNELS))
576 /* DFS only works on one channel. */
577 if (WARN_ON(c->radar_detect_widths &&
578 (c->num_different_channels > 1)))
581 if (WARN_ON(!c->n_limits))
584 for (j = 0; j < c->n_limits; j++) {
585 u16 types = c->limits[j].types;
587 /* interface types shouldn't overlap */
588 if (WARN_ON(types & all_iftypes))
590 all_iftypes |= types;
592 if (WARN_ON(!c->limits[j].max))
595 /* Shouldn't list software iftypes in combinations! */
596 if (WARN_ON(wiphy->software_iftypes & types))
599 /* Only a single P2P_DEVICE can be allowed */
600 if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) &&
601 c->limits[j].max > 1))
604 /* Only a single NAN can be allowed */
605 if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) &&
606 c->limits[j].max > 1))
610 * This isn't well-defined right now. If you have an
611 * IBSS interface, then its beacon interval may change
612 * by joining other networks, and nothing prevents it
614 * So technically we probably shouldn't even allow AP
615 * and IBSS in the same interface, but it seems that
616 * some drivers support that, possibly only with fixed
617 * beacon intervals for IBSS.
619 if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) &&
620 c->beacon_int_min_gcd)) {
624 cnt += c->limits[j].max;
626 * Don't advertise an unsupported type
629 if (WARN_ON((wiphy->interface_modes & types) != types))
633 #ifndef CONFIG_WIRELESS_WDS
634 if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS)))
638 /* You can't even choose that many! */
639 if (WARN_ON(cnt < c->max_interfaces))
646 int wiphy_register(struct wiphy *wiphy)
648 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
650 enum nl80211_band band;
651 struct ieee80211_supported_band *sband;
652 bool have_band = false;
654 u16 ifmodes = wiphy->interface_modes;
657 if (WARN_ON(wiphy->wowlan &&
658 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
659 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
661 if (WARN_ON(wiphy->wowlan &&
662 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns &&
663 !wiphy->wowlan->tcp))
666 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
667 (!rdev->ops->tdls_channel_switch ||
668 !rdev->ops->tdls_cancel_channel_switch)))
671 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) &&
672 (!rdev->ops->start_nan || !rdev->ops->stop_nan ||
673 !rdev->ops->add_nan_func || !rdev->ops->del_nan_func ||
674 !(wiphy->nan_supported_bands & BIT(NL80211_BAND_2GHZ)))))
677 #ifndef CONFIG_WIRELESS_WDS
678 if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)))
682 if (WARN_ON(wiphy->pmsr_capa && !wiphy->pmsr_capa->ftm.supported))
685 if (wiphy->pmsr_capa && wiphy->pmsr_capa->ftm.supported) {
686 if (WARN_ON(!wiphy->pmsr_capa->ftm.asap &&
687 !wiphy->pmsr_capa->ftm.non_asap))
689 if (WARN_ON(!wiphy->pmsr_capa->ftm.preambles ||
690 !wiphy->pmsr_capa->ftm.bandwidths))
692 if (WARN_ON(wiphy->pmsr_capa->ftm.preambles &
693 ~(BIT(NL80211_PREAMBLE_LEGACY) |
694 BIT(NL80211_PREAMBLE_HT) |
695 BIT(NL80211_PREAMBLE_VHT) |
696 BIT(NL80211_PREAMBLE_DMG))))
698 if (WARN_ON(wiphy->pmsr_capa->ftm.bandwidths &
699 ~(BIT(NL80211_CHAN_WIDTH_20_NOHT) |
700 BIT(NL80211_CHAN_WIDTH_20) |
701 BIT(NL80211_CHAN_WIDTH_40) |
702 BIT(NL80211_CHAN_WIDTH_80) |
703 BIT(NL80211_CHAN_WIDTH_80P80) |
704 BIT(NL80211_CHAN_WIDTH_160) |
705 BIT(NL80211_CHAN_WIDTH_5) |
706 BIT(NL80211_CHAN_WIDTH_10))))
711 * if a wiphy has unsupported modes for regulatory channel enforcement,
712 * opt-out of enforcement checking
714 if (wiphy->interface_modes & ~(BIT(NL80211_IFTYPE_STATION) |
715 BIT(NL80211_IFTYPE_P2P_CLIENT) |
716 BIT(NL80211_IFTYPE_AP) |
717 BIT(NL80211_IFTYPE_P2P_GO) |
718 BIT(NL80211_IFTYPE_ADHOC) |
719 BIT(NL80211_IFTYPE_P2P_DEVICE) |
720 BIT(NL80211_IFTYPE_NAN) |
721 BIT(NL80211_IFTYPE_AP_VLAN) |
722 BIT(NL80211_IFTYPE_MONITOR)))
723 wiphy->regulatory_flags |= REGULATORY_IGNORE_STALE_KICKOFF;
725 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) &&
726 (wiphy->regulatory_flags &
727 (REGULATORY_CUSTOM_REG |
728 REGULATORY_STRICT_REG |
729 REGULATORY_COUNTRY_IE_FOLLOW_POWER |
730 REGULATORY_COUNTRY_IE_IGNORE))))
733 if (WARN_ON(wiphy->coalesce &&
734 (!wiphy->coalesce->n_rules ||
735 !wiphy->coalesce->n_patterns) &&
736 (!wiphy->coalesce->pattern_min_len ||
737 wiphy->coalesce->pattern_min_len >
738 wiphy->coalesce->pattern_max_len)))
741 if (WARN_ON(wiphy->ap_sme_capa &&
742 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
745 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
748 if (WARN_ON(wiphy->addresses &&
749 !is_zero_ether_addr(wiphy->perm_addr) &&
750 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
754 if (WARN_ON(wiphy->max_acl_mac_addrs &&
755 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) ||
756 !rdev->ops->set_mac_acl)))
759 /* assure only valid behaviours are flagged by driver
760 * hence subtract 2 as bit 0 is invalid.
762 if (WARN_ON(wiphy->bss_select_support &&
763 (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2))))
766 if (WARN_ON(wiphy_ext_feature_isset(&rdev->wiphy,
767 NL80211_EXT_FEATURE_4WAY_HANDSHAKE_STA_1X) &&
768 (!rdev->ops->set_pmk || !rdev->ops->del_pmk)))
771 if (WARN_ON(!(rdev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM) &&
772 rdev->ops->update_connect_params))
775 if (wiphy->addresses)
776 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
778 /* sanity check ifmodes */
780 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
781 if (WARN_ON(ifmodes != wiphy->interface_modes))
782 wiphy->interface_modes = ifmodes;
784 res = wiphy_verify_combinations(wiphy);
788 /* sanity check supported bands/channels */
789 for (band = 0; band < NUM_NL80211_BANDS; band++) {
792 sband = wiphy->bands[band];
797 if (WARN_ON(!sband->n_channels))
800 * on 60GHz band, there are no legacy rates, so
803 if (WARN_ON(band != NL80211_BAND_60GHZ &&
808 * Since cfg80211_disable_40mhz_24ghz is global, we can
809 * modify the sband's ht data even if the driver uses a
810 * global structure for that.
812 if (cfg80211_disable_40mhz_24ghz &&
813 band == NL80211_BAND_2GHZ &&
814 sband->ht_cap.ht_supported) {
815 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
816 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
820 * Since we use a u32 for rate bitmaps in
821 * ieee80211_get_response_rate, we cannot
822 * have more than 32 legacy rates.
824 if (WARN_ON(sband->n_bitrates > 32))
827 for (i = 0; i < sband->n_channels; i++) {
828 sband->channels[i].orig_flags =
829 sband->channels[i].flags;
830 sband->channels[i].orig_mag = INT_MAX;
831 sband->channels[i].orig_mpwr =
832 sband->channels[i].max_power;
833 sband->channels[i].band = band;
836 for (i = 0; i < sband->n_iftype_data; i++) {
837 const struct ieee80211_sband_iftype_data *iftd;
839 iftd = &sband->iftype_data[i];
841 if (WARN_ON(!iftd->types_mask))
843 if (WARN_ON(types & iftd->types_mask))
846 /* at least one piece of information must be present */
847 if (WARN_ON(!iftd->he_cap.has_he))
850 types |= iftd->types_mask;
862 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns &&
863 (!rdev->wiphy.wowlan->pattern_min_len ||
864 rdev->wiphy.wowlan->pattern_min_len >
865 rdev->wiphy.wowlan->pattern_max_len)))
869 /* check and set up bitrates */
870 ieee80211_set_bitrate_flags(wiphy);
872 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH;
875 res = device_add(&rdev->wiphy.dev);
881 /* set up regulatory info */
882 wiphy_regulatory_register(wiphy);
884 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
885 cfg80211_rdev_list_generation++;
888 rdev->wiphy.debugfsdir =
889 debugfs_create_dir(wiphy_name(&rdev->wiphy),
890 ieee80211_debugfs_dir);
891 if (IS_ERR(rdev->wiphy.debugfsdir))
892 rdev->wiphy.debugfsdir = NULL;
894 cfg80211_debugfs_rdev_add(rdev);
895 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
897 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
898 struct regulatory_request request;
900 request.wiphy_idx = get_wiphy_idx(wiphy);
901 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
902 request.alpha2[0] = '9';
903 request.alpha2[1] = '9';
905 nl80211_send_reg_change_event(&request);
908 /* Check that nobody globally advertises any capabilities they do not
909 * advertise on all possible interface types.
911 if (wiphy->extended_capabilities_len &&
912 wiphy->num_iftype_ext_capab &&
913 wiphy->iftype_ext_capab) {
914 u8 supported_on_all, j;
915 const struct wiphy_iftype_ext_capab *capab;
917 capab = wiphy->iftype_ext_capab;
918 for (j = 0; j < wiphy->extended_capabilities_len; j++) {
919 if (capab[0].extended_capabilities_len > j)
921 capab[0].extended_capabilities[j];
923 supported_on_all = 0x00;
924 for (i = 1; i < wiphy->num_iftype_ext_capab; i++) {
925 if (j >= capab[i].extended_capabilities_len) {
926 supported_on_all = 0x00;
930 capab[i].extended_capabilities[j];
932 if (WARN_ON(wiphy->extended_capabilities[j] &
938 rdev->wiphy.registered = true;
941 res = rfkill_register(rdev->rfkill);
943 rfkill_destroy(rdev->rfkill);
945 wiphy_unregister(&rdev->wiphy);
951 EXPORT_SYMBOL(wiphy_register);
953 void wiphy_rfkill_start_polling(struct wiphy *wiphy)
955 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
957 if (!rdev->ops->rfkill_poll)
959 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
960 rfkill_resume_polling(rdev->rfkill);
962 EXPORT_SYMBOL(wiphy_rfkill_start_polling);
964 void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
966 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
968 rfkill_pause_polling(rdev->rfkill);
970 EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
972 void wiphy_unregister(struct wiphy *wiphy)
974 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
976 wait_event(rdev->dev_wait, ({
979 __count = rdev->opencount;
984 rfkill_unregister(rdev->rfkill);
987 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
988 rdev->wiphy.registered = false;
990 WARN_ON(!list_empty(&rdev->wiphy.wdev_list));
993 * First remove the hardware from everywhere, this makes
994 * it impossible to find from userspace.
996 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
997 list_del_rcu(&rdev->list);
1001 * If this device got a regulatory hint tell core its
1002 * free to listen now to a new shiny device regulatory hint
1004 wiphy_regulatory_deregister(wiphy);
1006 cfg80211_rdev_list_generation++;
1007 device_del(&rdev->wiphy.dev);
1011 flush_work(&rdev->scan_done_wk);
1012 cancel_work_sync(&rdev->conn_work);
1013 flush_work(&rdev->event_work);
1014 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
1015 flush_work(&rdev->destroy_work);
1016 flush_work(&rdev->sched_scan_stop_wk);
1017 flush_work(&rdev->mlme_unreg_wk);
1018 flush_work(&rdev->propagate_radar_detect_wk);
1019 flush_work(&rdev->propagate_cac_done_wk);
1022 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
1023 rdev_set_wakeup(rdev, false);
1025 cfg80211_rdev_free_wowlan(rdev);
1026 cfg80211_rdev_free_coalesce(rdev);
1028 EXPORT_SYMBOL(wiphy_unregister);
1030 void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
1032 struct cfg80211_internal_bss *scan, *tmp;
1033 struct cfg80211_beacon_registration *reg, *treg;
1034 rfkill_destroy(rdev->rfkill);
1035 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
1036 list_del(®->list);
1039 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
1040 cfg80211_put_bss(&rdev->wiphy, &scan->pub);
1044 void wiphy_free(struct wiphy *wiphy)
1046 put_device(&wiphy->dev);
1048 EXPORT_SYMBOL(wiphy_free);
1050 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
1052 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1054 if (rfkill_set_hw_state(rdev->rfkill, blocked))
1055 schedule_work(&rdev->rfkill_sync);
1057 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
1059 void cfg80211_cqm_config_free(struct wireless_dev *wdev)
1061 kfree(wdev->cqm_config);
1062 wdev->cqm_config = NULL;
1065 static void __cfg80211_unregister_wdev(struct wireless_dev *wdev, bool sync)
1067 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1071 flush_work(&wdev->pmsr_free_wk);
1073 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE);
1075 list_del_rcu(&wdev->list);
1078 rdev->devlist_generation++;
1080 cfg80211_mlme_purge_registrations(wdev);
1082 switch (wdev->iftype) {
1083 case NL80211_IFTYPE_P2P_DEVICE:
1084 cfg80211_stop_p2p_device(rdev, wdev);
1086 case NL80211_IFTYPE_NAN:
1087 cfg80211_stop_nan(rdev, wdev);
1093 #ifdef CONFIG_CFG80211_WEXT
1094 kzfree(wdev->wext.keys);
1096 /* only initialized if we have a netdev */
1098 flush_work(&wdev->disconnect_wk);
1100 cfg80211_cqm_config_free(wdev);
1103 void cfg80211_unregister_wdev(struct wireless_dev *wdev)
1105 if (WARN_ON(wdev->netdev))
1108 __cfg80211_unregister_wdev(wdev, true);
1110 EXPORT_SYMBOL(cfg80211_unregister_wdev);
1112 static const struct device_type wiphy_type = {
1116 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
1117 enum nl80211_iftype iftype, int num)
1121 rdev->num_running_ifaces += num;
1122 if (iftype == NL80211_IFTYPE_MONITOR)
1123 rdev->num_running_monitor_ifaces += num;
1126 void __cfg80211_leave(struct cfg80211_registered_device *rdev,
1127 struct wireless_dev *wdev)
1129 struct net_device *dev = wdev->netdev;
1130 struct cfg80211_sched_scan_request *pos, *tmp;
1133 ASSERT_WDEV_LOCK(wdev);
1135 cfg80211_pmsr_wdev_down(wdev);
1137 switch (wdev->iftype) {
1138 case NL80211_IFTYPE_ADHOC:
1139 __cfg80211_leave_ibss(rdev, dev, true);
1141 case NL80211_IFTYPE_P2P_CLIENT:
1142 case NL80211_IFTYPE_STATION:
1143 list_for_each_entry_safe(pos, tmp, &rdev->sched_scan_req_list,
1145 if (dev == pos->dev)
1146 cfg80211_stop_sched_scan_req(rdev, pos, false);
1149 #ifdef CONFIG_CFG80211_WEXT
1150 kfree(wdev->wext.ie);
1151 wdev->wext.ie = NULL;
1152 wdev->wext.ie_len = 0;
1153 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1155 cfg80211_disconnect(rdev, dev,
1156 WLAN_REASON_DEAUTH_LEAVING, true);
1158 case NL80211_IFTYPE_MESH_POINT:
1159 __cfg80211_leave_mesh(rdev, dev);
1161 case NL80211_IFTYPE_AP:
1162 case NL80211_IFTYPE_P2P_GO:
1163 __cfg80211_stop_ap(rdev, dev, true);
1165 case NL80211_IFTYPE_OCB:
1166 __cfg80211_leave_ocb(rdev, dev);
1168 case NL80211_IFTYPE_WDS:
1169 /* must be handled by mac80211/driver, has no APIs */
1171 case NL80211_IFTYPE_P2P_DEVICE:
1172 case NL80211_IFTYPE_NAN:
1173 /* cannot happen, has no netdev */
1175 case NL80211_IFTYPE_AP_VLAN:
1176 case NL80211_IFTYPE_MONITOR:
1179 case NL80211_IFTYPE_UNSPECIFIED:
1180 case NUM_NL80211_IFTYPES:
1186 void cfg80211_leave(struct cfg80211_registered_device *rdev,
1187 struct wireless_dev *wdev)
1190 __cfg80211_leave(rdev, wdev);
1194 void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev,
1197 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1198 struct cfg80211_event *ev;
1199 unsigned long flags;
1201 trace_cfg80211_stop_iface(wiphy, wdev);
1203 ev = kzalloc(sizeof(*ev), gfp);
1207 ev->type = EVENT_STOPPED;
1209 spin_lock_irqsave(&wdev->event_lock, flags);
1210 list_add_tail(&ev->list, &wdev->event_list);
1211 spin_unlock_irqrestore(&wdev->event_lock, flags);
1212 queue_work(cfg80211_wq, &rdev->event_work);
1214 EXPORT_SYMBOL(cfg80211_stop_iface);
1216 void cfg80211_init_wdev(struct cfg80211_registered_device *rdev,
1217 struct wireless_dev *wdev)
1219 mutex_init(&wdev->mtx);
1220 INIT_LIST_HEAD(&wdev->event_list);
1221 spin_lock_init(&wdev->event_lock);
1222 INIT_LIST_HEAD(&wdev->mgmt_registrations);
1223 spin_lock_init(&wdev->mgmt_registrations_lock);
1224 INIT_LIST_HEAD(&wdev->pmsr_list);
1225 spin_lock_init(&wdev->pmsr_lock);
1226 INIT_WORK(&wdev->pmsr_free_wk, cfg80211_pmsr_free_wk);
1229 * We get here also when the interface changes network namespaces,
1230 * as it's registered into the new one, but we don't want it to
1231 * change ID in that case. Checking if the ID is already assigned
1232 * works, because 0 isn't considered a valid ID and the memory is
1235 if (!wdev->identifier)
1236 wdev->identifier = ++rdev->wdev_id;
1237 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
1238 rdev->devlist_generation++;
1240 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
1243 static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
1244 unsigned long state, void *ptr)
1246 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1247 struct wireless_dev *wdev = dev->ieee80211_ptr;
1248 struct cfg80211_registered_device *rdev;
1249 struct cfg80211_sched_scan_request *pos, *tmp;
1254 rdev = wiphy_to_rdev(wdev->wiphy);
1256 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
1259 case NETDEV_POST_INIT:
1260 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
1262 case NETDEV_REGISTER:
1264 * NB: cannot take rdev->mtx here because this may be
1265 * called within code protected by it when interfaces
1266 * are added with nl80211.
1268 /* can only change netns with wiphy */
1269 dev->features |= NETIF_F_NETNS_LOCAL;
1271 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
1273 pr_err("failed to add phy80211 symlink to netdev!\n");
1276 #ifdef CONFIG_CFG80211_WEXT
1277 wdev->wext.default_key = -1;
1278 wdev->wext.default_mgmt_key = -1;
1279 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1282 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
1286 /* allow mac80211 to determine the timeout */
1287 wdev->ps_timeout = -1;
1289 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1290 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
1291 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
1292 dev->priv_flags |= IFF_DONT_BRIDGE;
1294 INIT_WORK(&wdev->disconnect_wk, cfg80211_autodisconnect_wk);
1296 cfg80211_init_wdev(rdev, wdev);
1298 case NETDEV_GOING_DOWN:
1299 cfg80211_leave(rdev, wdev);
1302 cfg80211_update_iface_num(rdev, wdev->iftype, -1);
1303 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
1304 if (WARN_ON(!rdev->scan_req->notified))
1305 rdev->scan_req->info.aborted = true;
1306 ___cfg80211_scan_done(rdev, false);
1309 list_for_each_entry_safe(pos, tmp,
1310 &rdev->sched_scan_req_list, list) {
1311 if (WARN_ON(pos->dev == wdev->netdev))
1312 cfg80211_stop_sched_scan_req(rdev, pos, false);
1316 wake_up(&rdev->dev_wait);
1319 cfg80211_update_iface_num(rdev, wdev->iftype, 1);
1321 switch (wdev->iftype) {
1322 #ifdef CONFIG_CFG80211_WEXT
1323 case NL80211_IFTYPE_ADHOC:
1324 cfg80211_ibss_wext_join(rdev, wdev);
1326 case NL80211_IFTYPE_STATION:
1327 cfg80211_mgd_wext_connect(rdev, wdev);
1330 #ifdef CONFIG_MAC80211_MESH
1331 case NL80211_IFTYPE_MESH_POINT:
1333 /* backward compat code... */
1334 struct mesh_setup setup;
1335 memcpy(&setup, &default_mesh_setup,
1337 /* back compat only needed for mesh_id */
1338 setup.mesh_id = wdev->ssid;
1339 setup.mesh_id_len = wdev->mesh_id_up_len;
1340 if (wdev->mesh_id_up_len)
1341 __cfg80211_join_mesh(rdev, dev,
1343 &default_mesh_config);
1354 * Configure power management to the driver here so that its
1355 * correctly set also after interface type changes etc.
1357 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1358 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
1359 rdev->ops->set_power_mgmt &&
1360 rdev_set_power_mgmt(rdev, dev, wdev->ps,
1361 wdev->ps_timeout)) {
1362 /* assume this means it's off */
1366 case NETDEV_UNREGISTER:
1368 * It is possible to get NETDEV_UNREGISTER
1369 * multiple times. To detect that, check
1370 * that the interface is still on the list
1371 * of registered interfaces, and only then
1372 * remove and clean it up.
1374 if (!list_empty(&wdev->list)) {
1375 __cfg80211_unregister_wdev(wdev, false);
1376 sysfs_remove_link(&dev->dev.kobj, "phy80211");
1379 * synchronise (so that we won't find this netdev
1380 * from other code any more) and then clear the list
1381 * head so that the above code can safely check for
1382 * !list_empty() to avoid double-cleanup.
1385 INIT_LIST_HEAD(&wdev->list);
1387 * Ensure that all events have been processed and
1390 cfg80211_process_wdev_events(wdev);
1392 if (WARN_ON(wdev->current_bss)) {
1393 cfg80211_unhold_bss(wdev->current_bss);
1394 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
1395 wdev->current_bss = NULL;
1399 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
1400 return notifier_from_errno(-EOPNOTSUPP);
1401 if (rfkill_blocked(rdev->rfkill))
1402 return notifier_from_errno(-ERFKILL);
1408 wireless_nlevent_flush();
1413 static struct notifier_block cfg80211_netdev_notifier = {
1414 .notifier_call = cfg80211_netdev_notifier_call,
1417 static void __net_exit cfg80211_pernet_exit(struct net *net)
1419 struct cfg80211_registered_device *rdev;
1422 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1423 if (net_eq(wiphy_net(&rdev->wiphy), net))
1424 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
1429 static struct pernet_operations cfg80211_pernet_ops = {
1430 .exit = cfg80211_pernet_exit,
1433 static int __init cfg80211_init(void)
1437 err = register_pernet_device(&cfg80211_pernet_ops);
1439 goto out_fail_pernet;
1441 err = wiphy_sysfs_init();
1443 goto out_fail_sysfs;
1445 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
1447 goto out_fail_notifier;
1449 err = nl80211_init();
1451 goto out_fail_nl80211;
1453 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
1455 err = regulatory_init();
1459 cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM);
1470 debugfs_remove(ieee80211_debugfs_dir);
1473 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1477 unregister_pernet_device(&cfg80211_pernet_ops);
1481 fs_initcall(cfg80211_init);
1483 static void __exit cfg80211_exit(void)
1485 debugfs_remove(ieee80211_debugfs_dir);
1487 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1490 unregister_pernet_device(&cfg80211_pernet_ops);
1491 destroy_workqueue(cfg80211_wq);
1493 module_exit(cfg80211_exit);