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 Intel Deutschland GmbH
9 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
12 #include <linux/module.h>
13 #include <linux/err.h>
14 #include <linux/list.h>
15 #include <linux/slab.h>
16 #include <linux/nl80211.h>
17 #include <linux/debugfs.h>
18 #include <linux/notifier.h>
19 #include <linux/device.h>
20 #include <linux/etherdevice.h>
21 #include <linux/rtnetlink.h>
22 #include <linux/sched.h>
23 #include <net/genetlink.h>
24 #include <net/cfg80211.h>
29 #include "wext-compat.h"
32 /* name for sysfs, %d is appended */
33 #define PHY_NAME "phy"
35 MODULE_AUTHOR("Johannes Berg");
36 MODULE_LICENSE("GPL");
37 MODULE_DESCRIPTION("wireless configuration support");
38 MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME);
40 /* RCU-protected (and RTNL for writers) */
41 LIST_HEAD(cfg80211_rdev_list);
42 int cfg80211_rdev_list_generation;
45 static struct dentry *ieee80211_debugfs_dir;
47 /* for the cleanup, scan and event works */
48 struct workqueue_struct *cfg80211_wq;
50 static bool cfg80211_disable_40mhz_24ghz;
51 module_param(cfg80211_disable_40mhz_24ghz, bool, 0644);
52 MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz,
53 "Disable 40MHz support in the 2.4GHz band");
55 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
57 struct cfg80211_registered_device *result = NULL, *rdev;
61 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
62 if (rdev->wiphy_idx == wiphy_idx) {
71 int get_wiphy_idx(struct wiphy *wiphy)
73 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
75 return rdev->wiphy_idx;
78 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
80 struct cfg80211_registered_device *rdev;
84 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
90 static int cfg80211_dev_check_name(struct cfg80211_registered_device *rdev,
93 struct cfg80211_registered_device *rdev2;
94 int wiphy_idx, taken = -1, digits;
98 /* prohibit calling the thing phy%d when %d is not its number */
99 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
100 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
101 /* count number of places needed to print wiphy_idx */
103 while (wiphy_idx /= 10)
106 * deny the name if it is phy<idx> where <idx> is printed
107 * without leading zeroes. taken == strlen(newname) here
109 if (taken == strlen(PHY_NAME) + digits)
113 /* Ensure another device does not already have this name. */
114 list_for_each_entry(rdev2, &cfg80211_rdev_list, list)
115 if (strcmp(newname, wiphy_name(&rdev2->wiphy)) == 0)
121 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
128 /* Ignore nop renames */
129 if (strcmp(newname, wiphy_name(&rdev->wiphy)) == 0)
132 result = cfg80211_dev_check_name(rdev, newname);
136 result = device_rename(&rdev->wiphy.dev, newname);
140 if (rdev->wiphy.debugfsdir &&
141 !debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
142 rdev->wiphy.debugfsdir,
143 rdev->wiphy.debugfsdir->d_parent,
145 pr_err("failed to rename debugfs dir to %s!\n", newname);
147 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
152 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
155 struct wireless_dev *wdev;
158 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK))
161 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
164 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
165 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
168 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
172 /* failed -- clean up to old netns */
173 net = wiphy_net(&rdev->wiphy);
175 list_for_each_entry_continue_reverse(wdev,
176 &rdev->wiphy.wdev_list,
180 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
181 err = dev_change_net_namespace(wdev->netdev, net,
184 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
190 wiphy_net_set(&rdev->wiphy, net);
192 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev));
198 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
200 struct cfg80211_registered_device *rdev = data;
202 rdev_rfkill_poll(rdev);
205 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
206 struct wireless_dev *wdev)
210 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE))
213 if (!wdev->p2p_started)
216 rdev_stop_p2p_device(rdev, wdev);
217 wdev->p2p_started = false;
221 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
222 if (WARN_ON(!rdev->scan_req->notified))
223 rdev->scan_req->info.aborted = true;
224 ___cfg80211_scan_done(rdev, false);
228 void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy)
230 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
231 struct wireless_dev *wdev;
235 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
237 dev_close(wdev->netdev);
240 /* otherwise, check iftype */
241 switch (wdev->iftype) {
242 case NL80211_IFTYPE_P2P_DEVICE:
243 cfg80211_stop_p2p_device(rdev, wdev);
250 EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces);
252 static int cfg80211_rfkill_set_block(void *data, bool blocked)
254 struct cfg80211_registered_device *rdev = data;
260 cfg80211_shutdown_all_interfaces(&rdev->wiphy);
266 static void cfg80211_rfkill_sync_work(struct work_struct *work)
268 struct cfg80211_registered_device *rdev;
270 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync);
271 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
274 static void cfg80211_event_work(struct work_struct *work)
276 struct cfg80211_registered_device *rdev;
278 rdev = container_of(work, struct cfg80211_registered_device,
282 cfg80211_process_rdev_events(rdev);
286 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev)
288 struct cfg80211_iface_destroy *item;
292 spin_lock_irq(&rdev->destroy_list_lock);
293 while ((item = list_first_entry_or_null(&rdev->destroy_list,
294 struct cfg80211_iface_destroy,
296 struct wireless_dev *wdev, *tmp;
297 u32 nlportid = item->nlportid;
299 list_del(&item->list);
301 spin_unlock_irq(&rdev->destroy_list_lock);
303 list_for_each_entry_safe(wdev, tmp,
304 &rdev->wiphy.wdev_list, list) {
305 if (nlportid == wdev->owner_nlportid)
306 rdev_del_virtual_intf(rdev, wdev);
309 spin_lock_irq(&rdev->destroy_list_lock);
311 spin_unlock_irq(&rdev->destroy_list_lock);
314 static void cfg80211_destroy_iface_wk(struct work_struct *work)
316 struct cfg80211_registered_device *rdev;
318 rdev = container_of(work, struct cfg80211_registered_device,
322 cfg80211_destroy_ifaces(rdev);
326 static void cfg80211_sched_scan_stop_wk(struct work_struct *work)
328 struct cfg80211_registered_device *rdev;
330 rdev = container_of(work, struct cfg80211_registered_device,
335 __cfg80211_stop_sched_scan(rdev, false);
340 /* exported functions */
342 struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv,
343 const char *requested_name)
345 static atomic_t wiphy_counter = ATOMIC_INIT(0);
347 struct cfg80211_registered_device *rdev;
350 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
351 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
352 WARN_ON(ops->connect && !ops->disconnect);
353 WARN_ON(ops->join_ibss && !ops->leave_ibss);
354 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
355 WARN_ON(ops->add_station && !ops->del_station);
356 WARN_ON(ops->add_mpath && !ops->del_mpath);
357 WARN_ON(ops->join_mesh && !ops->leave_mesh);
358 WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device);
359 WARN_ON(ops->start_ap && !ops->stop_ap);
360 WARN_ON(ops->join_ocb && !ops->leave_ocb);
361 WARN_ON(ops->suspend && !ops->resume);
362 WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop);
363 WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel);
364 WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch);
365 WARN_ON(ops->add_tx_ts && !ops->del_tx_ts);
367 alloc_size = sizeof(*rdev) + sizeof_priv;
369 rdev = kzalloc(alloc_size, GFP_KERNEL);
375 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter);
377 if (unlikely(rdev->wiphy_idx < 0)) {
379 atomic_dec(&wiphy_counter);
384 /* atomic_inc_return makes it start at 1, make it start at 0 */
387 /* give it a proper name */
388 if (requested_name && requested_name[0]) {
392 rv = cfg80211_dev_check_name(rdev, requested_name);
396 goto use_default_name;
399 rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name);
402 goto use_default_name;
405 /* NOTE: This is *probably* safe w/out holding rtnl because of
406 * the restrictions on phy names. Probably this call could
407 * fail if some other part of the kernel (re)named a device
408 * phyX. But, might should add some locking and check return
409 * value, and use a different name if this one exists?
411 dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
414 INIT_LIST_HEAD(&rdev->wiphy.wdev_list);
415 INIT_LIST_HEAD(&rdev->beacon_registrations);
416 spin_lock_init(&rdev->beacon_registrations_lock);
417 spin_lock_init(&rdev->bss_lock);
418 INIT_LIST_HEAD(&rdev->bss_list);
419 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
420 INIT_WORK(&rdev->sched_scan_results_wk, __cfg80211_sched_scan_results);
421 INIT_LIST_HEAD(&rdev->mlme_unreg);
422 spin_lock_init(&rdev->mlme_unreg_lock);
423 INIT_WORK(&rdev->mlme_unreg_wk, cfg80211_mlme_unreg_wk);
424 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk,
425 cfg80211_dfs_channels_update_work);
426 #ifdef CONFIG_CFG80211_WEXT
427 rdev->wiphy.wext = &cfg80211_wext_handler;
430 device_initialize(&rdev->wiphy.dev);
431 rdev->wiphy.dev.class = &ieee80211_class;
432 rdev->wiphy.dev.platform_data = rdev;
433 device_enable_async_suspend(&rdev->wiphy.dev);
435 INIT_LIST_HEAD(&rdev->destroy_list);
436 spin_lock_init(&rdev->destroy_list_lock);
437 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk);
438 INIT_WORK(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk);
440 #ifdef CONFIG_CFG80211_DEFAULT_PS
441 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
444 wiphy_net_set(&rdev->wiphy, &init_net);
446 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
447 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
448 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
449 &rdev->rfkill_ops, rdev);
456 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
457 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
458 INIT_WORK(&rdev->event_work, cfg80211_event_work);
460 init_waitqueue_head(&rdev->dev_wait);
463 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
464 * Fragmentation and RTS threshold are disabled by default with the
467 rdev->wiphy.retry_short = 7;
468 rdev->wiphy.retry_long = 4;
469 rdev->wiphy.frag_threshold = (u32) -1;
470 rdev->wiphy.rts_threshold = (u32) -1;
471 rdev->wiphy.coverage_class = 0;
473 rdev->wiphy.max_num_csa_counters = 1;
475 rdev->wiphy.max_sched_scan_plans = 1;
476 rdev->wiphy.max_sched_scan_plan_interval = U32_MAX;
480 EXPORT_SYMBOL(wiphy_new_nm);
482 static int wiphy_verify_combinations(struct wiphy *wiphy)
484 const struct ieee80211_iface_combination *c;
487 for (i = 0; i < wiphy->n_iface_combinations; i++) {
491 c = &wiphy->iface_combinations[i];
494 * Combinations with just one interface aren't real,
495 * however we make an exception for DFS.
497 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths))
500 /* Need at least one channel */
501 if (WARN_ON(!c->num_different_channels))
505 * Put a sane limit on maximum number of different
506 * channels to simplify channel accounting code.
508 if (WARN_ON(c->num_different_channels >
509 CFG80211_MAX_NUM_DIFFERENT_CHANNELS))
512 /* DFS only works on one channel. */
513 if (WARN_ON(c->radar_detect_widths &&
514 (c->num_different_channels > 1)))
517 if (WARN_ON(!c->n_limits))
520 for (j = 0; j < c->n_limits; j++) {
521 u16 types = c->limits[j].types;
523 /* interface types shouldn't overlap */
524 if (WARN_ON(types & all_iftypes))
526 all_iftypes |= types;
528 if (WARN_ON(!c->limits[j].max))
531 /* Shouldn't list software iftypes in combinations! */
532 if (WARN_ON(wiphy->software_iftypes & types))
535 /* Only a single P2P_DEVICE can be allowed */
536 if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) &&
537 c->limits[j].max > 1))
540 cnt += c->limits[j].max;
542 * Don't advertise an unsupported type
545 if (WARN_ON((wiphy->interface_modes & types) != types))
549 /* You can't even choose that many! */
550 if (WARN_ON(cnt < c->max_interfaces))
557 int wiphy_register(struct wiphy *wiphy)
559 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
561 enum nl80211_band band;
562 struct ieee80211_supported_band *sband;
563 bool have_band = false;
565 u16 ifmodes = wiphy->interface_modes;
568 if (WARN_ON(wiphy->wowlan &&
569 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
570 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
572 if (WARN_ON(wiphy->wowlan &&
573 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns &&
574 !wiphy->wowlan->tcp))
577 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
578 (!rdev->ops->tdls_channel_switch ||
579 !rdev->ops->tdls_cancel_channel_switch)))
583 * if a wiphy has unsupported modes for regulatory channel enforcement,
584 * opt-out of enforcement checking
586 if (wiphy->interface_modes & ~(BIT(NL80211_IFTYPE_STATION) |
587 BIT(NL80211_IFTYPE_P2P_CLIENT) |
588 BIT(NL80211_IFTYPE_AP) |
589 BIT(NL80211_IFTYPE_P2P_GO) |
590 BIT(NL80211_IFTYPE_ADHOC) |
591 BIT(NL80211_IFTYPE_P2P_DEVICE) |
592 BIT(NL80211_IFTYPE_AP_VLAN) |
593 BIT(NL80211_IFTYPE_MONITOR)))
594 wiphy->regulatory_flags |= REGULATORY_IGNORE_STALE_KICKOFF;
596 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) &&
597 (wiphy->regulatory_flags &
598 (REGULATORY_CUSTOM_REG |
599 REGULATORY_STRICT_REG |
600 REGULATORY_COUNTRY_IE_FOLLOW_POWER |
601 REGULATORY_COUNTRY_IE_IGNORE))))
604 if (WARN_ON(wiphy->coalesce &&
605 (!wiphy->coalesce->n_rules ||
606 !wiphy->coalesce->n_patterns) &&
607 (!wiphy->coalesce->pattern_min_len ||
608 wiphy->coalesce->pattern_min_len >
609 wiphy->coalesce->pattern_max_len)))
612 if (WARN_ON(wiphy->ap_sme_capa &&
613 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
616 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
619 if (WARN_ON(wiphy->addresses &&
620 !is_zero_ether_addr(wiphy->perm_addr) &&
621 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
625 if (WARN_ON(wiphy->max_acl_mac_addrs &&
626 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) ||
627 !rdev->ops->set_mac_acl)))
630 /* assure only valid behaviours are flagged by driver
631 * hence subtract 2 as bit 0 is invalid.
633 if (WARN_ON(wiphy->bss_select_support &&
634 (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2))))
637 if (wiphy->addresses)
638 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
640 /* sanity check ifmodes */
642 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
643 if (WARN_ON(ifmodes != wiphy->interface_modes))
644 wiphy->interface_modes = ifmodes;
646 res = wiphy_verify_combinations(wiphy);
650 /* sanity check supported bands/channels */
651 for (band = 0; band < NUM_NL80211_BANDS; band++) {
652 sband = wiphy->bands[band];
657 if (WARN_ON(!sband->n_channels))
660 * on 60GHz band, there are no legacy rates, so
663 if (WARN_ON(band != NL80211_BAND_60GHZ &&
668 * Since cfg80211_disable_40mhz_24ghz is global, we can
669 * modify the sband's ht data even if the driver uses a
670 * global structure for that.
672 if (cfg80211_disable_40mhz_24ghz &&
673 band == NL80211_BAND_2GHZ &&
674 sband->ht_cap.ht_supported) {
675 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
676 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
680 * Since we use a u32 for rate bitmaps in
681 * ieee80211_get_response_rate, we cannot
682 * have more than 32 legacy rates.
684 if (WARN_ON(sband->n_bitrates > 32))
687 for (i = 0; i < sband->n_channels; i++) {
688 sband->channels[i].orig_flags =
689 sband->channels[i].flags;
690 sband->channels[i].orig_mag = INT_MAX;
691 sband->channels[i].orig_mpwr =
692 sband->channels[i].max_power;
693 sband->channels[i].band = band;
705 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns &&
706 (!rdev->wiphy.wowlan->pattern_min_len ||
707 rdev->wiphy.wowlan->pattern_min_len >
708 rdev->wiphy.wowlan->pattern_max_len)))
712 /* check and set up bitrates */
713 ieee80211_set_bitrate_flags(wiphy);
715 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH;
718 res = device_add(&rdev->wiphy.dev);
724 /* set up regulatory info */
725 wiphy_regulatory_register(wiphy);
727 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
728 cfg80211_rdev_list_generation++;
731 rdev->wiphy.debugfsdir =
732 debugfs_create_dir(wiphy_name(&rdev->wiphy),
733 ieee80211_debugfs_dir);
734 if (IS_ERR(rdev->wiphy.debugfsdir))
735 rdev->wiphy.debugfsdir = NULL;
737 cfg80211_debugfs_rdev_add(rdev);
738 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
740 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
741 struct regulatory_request request;
743 request.wiphy_idx = get_wiphy_idx(wiphy);
744 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
745 request.alpha2[0] = '9';
746 request.alpha2[1] = '9';
748 nl80211_send_reg_change_event(&request);
751 /* Check that nobody globally advertises any capabilities they do not
752 * advertise on all possible interface types.
754 if (wiphy->extended_capabilities_len &&
755 wiphy->num_iftype_ext_capab &&
756 wiphy->iftype_ext_capab) {
757 u8 supported_on_all, j;
758 const struct wiphy_iftype_ext_capab *capab;
760 capab = wiphy->iftype_ext_capab;
761 for (j = 0; j < wiphy->extended_capabilities_len; j++) {
762 if (capab[0].extended_capabilities_len > j)
764 capab[0].extended_capabilities[j];
766 supported_on_all = 0x00;
767 for (i = 1; i < wiphy->num_iftype_ext_capab; i++) {
768 if (j >= capab[i].extended_capabilities_len) {
769 supported_on_all = 0x00;
773 capab[i].extended_capabilities[j];
775 if (WARN_ON(wiphy->extended_capabilities[j] &
781 rdev->wiphy.registered = true;
784 res = rfkill_register(rdev->rfkill);
786 rfkill_destroy(rdev->rfkill);
788 wiphy_unregister(&rdev->wiphy);
794 EXPORT_SYMBOL(wiphy_register);
796 void wiphy_rfkill_start_polling(struct wiphy *wiphy)
798 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
800 if (!rdev->ops->rfkill_poll)
802 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
803 rfkill_resume_polling(rdev->rfkill);
805 EXPORT_SYMBOL(wiphy_rfkill_start_polling);
807 void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
809 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
811 rfkill_pause_polling(rdev->rfkill);
813 EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
815 void wiphy_unregister(struct wiphy *wiphy)
817 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
819 wait_event(rdev->dev_wait, ({
822 __count = rdev->opencount;
827 rfkill_unregister(rdev->rfkill);
830 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
831 rdev->wiphy.registered = false;
833 WARN_ON(!list_empty(&rdev->wiphy.wdev_list));
836 * First remove the hardware from everywhere, this makes
837 * it impossible to find from userspace.
839 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
840 list_del_rcu(&rdev->list);
844 * If this device got a regulatory hint tell core its
845 * free to listen now to a new shiny device regulatory hint
847 wiphy_regulatory_deregister(wiphy);
849 cfg80211_rdev_list_generation++;
850 device_del(&rdev->wiphy.dev);
854 flush_work(&rdev->scan_done_wk);
855 cancel_work_sync(&rdev->conn_work);
856 flush_work(&rdev->event_work);
857 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
858 flush_work(&rdev->destroy_work);
859 flush_work(&rdev->sched_scan_stop_wk);
860 flush_work(&rdev->mlme_unreg_wk);
863 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
864 rdev_set_wakeup(rdev, false);
866 cfg80211_rdev_free_wowlan(rdev);
867 cfg80211_rdev_free_coalesce(rdev);
869 EXPORT_SYMBOL(wiphy_unregister);
871 void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
873 struct cfg80211_internal_bss *scan, *tmp;
874 struct cfg80211_beacon_registration *reg, *treg;
875 rfkill_destroy(rdev->rfkill);
876 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
877 list_del(®->list);
880 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
881 cfg80211_put_bss(&rdev->wiphy, &scan->pub);
885 void wiphy_free(struct wiphy *wiphy)
887 put_device(&wiphy->dev);
889 EXPORT_SYMBOL(wiphy_free);
891 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
893 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
895 if (rfkill_set_hw_state(rdev->rfkill, blocked))
896 schedule_work(&rdev->rfkill_sync);
898 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
900 void cfg80211_unregister_wdev(struct wireless_dev *wdev)
902 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
906 if (WARN_ON(wdev->netdev))
909 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE);
911 list_del_rcu(&wdev->list);
912 rdev->devlist_generation++;
914 switch (wdev->iftype) {
915 case NL80211_IFTYPE_P2P_DEVICE:
916 cfg80211_mlme_purge_registrations(wdev);
917 cfg80211_stop_p2p_device(rdev, wdev);
924 EXPORT_SYMBOL(cfg80211_unregister_wdev);
926 static const struct device_type wiphy_type = {
930 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
931 enum nl80211_iftype iftype, int num)
935 rdev->num_running_ifaces += num;
936 if (iftype == NL80211_IFTYPE_MONITOR)
937 rdev->num_running_monitor_ifaces += num;
940 void __cfg80211_leave(struct cfg80211_registered_device *rdev,
941 struct wireless_dev *wdev)
943 struct net_device *dev = wdev->netdev;
944 struct cfg80211_sched_scan_request *sched_scan_req;
947 ASSERT_WDEV_LOCK(wdev);
949 switch (wdev->iftype) {
950 case NL80211_IFTYPE_ADHOC:
951 __cfg80211_leave_ibss(rdev, dev, true);
953 case NL80211_IFTYPE_P2P_CLIENT:
954 case NL80211_IFTYPE_STATION:
955 sched_scan_req = rtnl_dereference(rdev->sched_scan_req);
956 if (sched_scan_req && dev == sched_scan_req->dev)
957 __cfg80211_stop_sched_scan(rdev, false);
959 #ifdef CONFIG_CFG80211_WEXT
960 kfree(wdev->wext.ie);
961 wdev->wext.ie = NULL;
962 wdev->wext.ie_len = 0;
963 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
965 cfg80211_disconnect(rdev, dev,
966 WLAN_REASON_DEAUTH_LEAVING, true);
968 case NL80211_IFTYPE_MESH_POINT:
969 __cfg80211_leave_mesh(rdev, dev);
971 case NL80211_IFTYPE_AP:
972 case NL80211_IFTYPE_P2P_GO:
973 __cfg80211_stop_ap(rdev, dev, true);
975 case NL80211_IFTYPE_OCB:
976 __cfg80211_leave_ocb(rdev, dev);
978 case NL80211_IFTYPE_WDS:
979 /* must be handled by mac80211/driver, has no APIs */
981 case NL80211_IFTYPE_P2P_DEVICE:
982 /* cannot happen, has no netdev */
984 case NL80211_IFTYPE_AP_VLAN:
985 case NL80211_IFTYPE_MONITOR:
988 case NL80211_IFTYPE_UNSPECIFIED:
989 case NUM_NL80211_IFTYPES:
995 void cfg80211_leave(struct cfg80211_registered_device *rdev,
996 struct wireless_dev *wdev)
999 __cfg80211_leave(rdev, wdev);
1003 void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev,
1006 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1007 struct cfg80211_event *ev;
1008 unsigned long flags;
1010 trace_cfg80211_stop_iface(wiphy, wdev);
1012 ev = kzalloc(sizeof(*ev), gfp);
1016 ev->type = EVENT_STOPPED;
1018 spin_lock_irqsave(&wdev->event_lock, flags);
1019 list_add_tail(&ev->list, &wdev->event_list);
1020 spin_unlock_irqrestore(&wdev->event_lock, flags);
1021 queue_work(cfg80211_wq, &rdev->event_work);
1023 EXPORT_SYMBOL(cfg80211_stop_iface);
1025 static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
1026 unsigned long state, void *ptr)
1028 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1029 struct wireless_dev *wdev = dev->ieee80211_ptr;
1030 struct cfg80211_registered_device *rdev;
1031 struct cfg80211_sched_scan_request *sched_scan_req;
1036 rdev = wiphy_to_rdev(wdev->wiphy);
1038 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
1041 case NETDEV_POST_INIT:
1042 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
1044 case NETDEV_REGISTER:
1046 * NB: cannot take rdev->mtx here because this may be
1047 * called within code protected by it when interfaces
1048 * are added with nl80211.
1050 mutex_init(&wdev->mtx);
1051 INIT_LIST_HEAD(&wdev->event_list);
1052 spin_lock_init(&wdev->event_lock);
1053 INIT_LIST_HEAD(&wdev->mgmt_registrations);
1054 spin_lock_init(&wdev->mgmt_registrations_lock);
1056 wdev->identifier = ++rdev->wdev_id;
1057 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
1058 rdev->devlist_generation++;
1059 /* can only change netns with wiphy */
1060 dev->features |= NETIF_F_NETNS_LOCAL;
1062 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
1064 pr_err("failed to add phy80211 symlink to netdev!\n");
1067 #ifdef CONFIG_CFG80211_WEXT
1068 wdev->wext.default_key = -1;
1069 wdev->wext.default_mgmt_key = -1;
1070 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1073 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
1077 /* allow mac80211 to determine the timeout */
1078 wdev->ps_timeout = -1;
1080 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1081 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
1082 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
1083 dev->priv_flags |= IFF_DONT_BRIDGE;
1085 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
1087 case NETDEV_GOING_DOWN:
1088 cfg80211_leave(rdev, wdev);
1091 cfg80211_update_iface_num(rdev, wdev->iftype, -1);
1092 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
1093 if (WARN_ON(!rdev->scan_req->notified))
1094 rdev->scan_req->info.aborted = true;
1095 ___cfg80211_scan_done(rdev, false);
1098 sched_scan_req = rtnl_dereference(rdev->sched_scan_req);
1099 if (WARN_ON(sched_scan_req &&
1100 sched_scan_req->dev == wdev->netdev)) {
1101 __cfg80211_stop_sched_scan(rdev, false);
1105 wake_up(&rdev->dev_wait);
1108 cfg80211_update_iface_num(rdev, wdev->iftype, 1);
1110 switch (wdev->iftype) {
1111 #ifdef CONFIG_CFG80211_WEXT
1112 case NL80211_IFTYPE_ADHOC:
1113 cfg80211_ibss_wext_join(rdev, wdev);
1115 case NL80211_IFTYPE_STATION:
1116 cfg80211_mgd_wext_connect(rdev, wdev);
1119 #ifdef CONFIG_MAC80211_MESH
1120 case NL80211_IFTYPE_MESH_POINT:
1122 /* backward compat code... */
1123 struct mesh_setup setup;
1124 memcpy(&setup, &default_mesh_setup,
1126 /* back compat only needed for mesh_id */
1127 setup.mesh_id = wdev->ssid;
1128 setup.mesh_id_len = wdev->mesh_id_up_len;
1129 if (wdev->mesh_id_up_len)
1130 __cfg80211_join_mesh(rdev, dev,
1132 &default_mesh_config);
1143 * Configure power management to the driver here so that its
1144 * correctly set also after interface type changes etc.
1146 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1147 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
1148 rdev->ops->set_power_mgmt)
1149 if (rdev_set_power_mgmt(rdev, dev, wdev->ps,
1150 wdev->ps_timeout)) {
1151 /* assume this means it's off */
1155 case NETDEV_UNREGISTER:
1157 * It is possible to get NETDEV_UNREGISTER
1158 * multiple times. To detect that, check
1159 * that the interface is still on the list
1160 * of registered interfaces, and only then
1161 * remove and clean it up.
1163 if (!list_empty(&wdev->list)) {
1164 nl80211_notify_iface(rdev, wdev,
1165 NL80211_CMD_DEL_INTERFACE);
1166 sysfs_remove_link(&dev->dev.kobj, "phy80211");
1167 list_del_rcu(&wdev->list);
1168 rdev->devlist_generation++;
1169 cfg80211_mlme_purge_registrations(wdev);
1170 #ifdef CONFIG_CFG80211_WEXT
1171 kzfree(wdev->wext.keys);
1175 * synchronise (so that we won't find this netdev
1176 * from other code any more) and then clear the list
1177 * head so that the above code can safely check for
1178 * !list_empty() to avoid double-cleanup.
1181 INIT_LIST_HEAD(&wdev->list);
1183 * Ensure that all events have been processed and
1186 cfg80211_process_wdev_events(wdev);
1188 if (WARN_ON(wdev->current_bss)) {
1189 cfg80211_unhold_bss(wdev->current_bss);
1190 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
1191 wdev->current_bss = NULL;
1195 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
1196 return notifier_from_errno(-EOPNOTSUPP);
1197 if (rfkill_blocked(rdev->rfkill))
1198 return notifier_from_errno(-ERFKILL);
1204 wireless_nlevent_flush();
1209 static struct notifier_block cfg80211_netdev_notifier = {
1210 .notifier_call = cfg80211_netdev_notifier_call,
1213 static void __net_exit cfg80211_pernet_exit(struct net *net)
1215 struct cfg80211_registered_device *rdev;
1218 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1219 if (net_eq(wiphy_net(&rdev->wiphy), net))
1220 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
1225 static struct pernet_operations cfg80211_pernet_ops = {
1226 .exit = cfg80211_pernet_exit,
1229 static int __init cfg80211_init(void)
1233 err = register_pernet_device(&cfg80211_pernet_ops);
1235 goto out_fail_pernet;
1237 err = wiphy_sysfs_init();
1239 goto out_fail_sysfs;
1241 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
1243 goto out_fail_notifier;
1245 err = nl80211_init();
1247 goto out_fail_nl80211;
1249 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
1251 err = regulatory_init();
1255 cfg80211_wq = create_singlethread_workqueue("cfg80211");
1266 debugfs_remove(ieee80211_debugfs_dir);
1269 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1273 unregister_pernet_device(&cfg80211_pernet_ops);
1277 subsys_initcall(cfg80211_init);
1279 static void __exit cfg80211_exit(void)
1281 debugfs_remove(ieee80211_debugfs_dir);
1283 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1286 unregister_pernet_device(&cfg80211_pernet_ops);
1287 destroy_workqueue(cfg80211_wq);
1289 module_exit(cfg80211_exit);