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 if (strlen(newname) > NL80211_WIPHY_NAME_MAXLEN)
101 /* prohibit calling the thing phy%d when %d is not its number */
102 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
103 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
104 /* count number of places needed to print wiphy_idx */
106 while (wiphy_idx /= 10)
109 * deny the name if it is phy<idx> where <idx> is printed
110 * without leading zeroes. taken == strlen(newname) here
112 if (taken == strlen(PHY_NAME) + digits)
116 /* Ensure another device does not already have this name. */
117 list_for_each_entry(rdev2, &cfg80211_rdev_list, list)
118 if (strcmp(newname, wiphy_name(&rdev2->wiphy)) == 0)
124 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
131 /* Ignore nop renames */
132 if (strcmp(newname, wiphy_name(&rdev->wiphy)) == 0)
135 result = cfg80211_dev_check_name(rdev, newname);
139 result = device_rename(&rdev->wiphy.dev, newname);
143 if (rdev->wiphy.debugfsdir &&
144 !debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
145 rdev->wiphy.debugfsdir,
146 rdev->wiphy.debugfsdir->d_parent,
148 pr_err("failed to rename debugfs dir to %s!\n", 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 wiphy_net_set(&rdev->wiphy, net);
195 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev));
201 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
203 struct cfg80211_registered_device *rdev = data;
205 rdev_rfkill_poll(rdev);
208 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
209 struct wireless_dev *wdev)
213 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE))
216 if (!wdev->p2p_started)
219 rdev_stop_p2p_device(rdev, wdev);
220 wdev->p2p_started = false;
224 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
225 if (WARN_ON(!rdev->scan_req->notified))
226 rdev->scan_req->aborted = true;
227 ___cfg80211_scan_done(rdev, false);
231 void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy)
233 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
234 struct wireless_dev *wdev;
238 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
240 dev_close(wdev->netdev);
243 /* otherwise, check iftype */
244 switch (wdev->iftype) {
245 case NL80211_IFTYPE_P2P_DEVICE:
246 cfg80211_stop_p2p_device(rdev, wdev);
253 EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces);
255 static int cfg80211_rfkill_set_block(void *data, bool blocked)
257 struct cfg80211_registered_device *rdev = data;
263 cfg80211_shutdown_all_interfaces(&rdev->wiphy);
269 static void cfg80211_rfkill_sync_work(struct work_struct *work)
271 struct cfg80211_registered_device *rdev;
273 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync);
274 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
277 static void cfg80211_event_work(struct work_struct *work)
279 struct cfg80211_registered_device *rdev;
281 rdev = container_of(work, struct cfg80211_registered_device,
285 cfg80211_process_rdev_events(rdev);
289 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev)
291 struct cfg80211_iface_destroy *item;
295 spin_lock_irq(&rdev->destroy_list_lock);
296 while ((item = list_first_entry_or_null(&rdev->destroy_list,
297 struct cfg80211_iface_destroy,
299 struct wireless_dev *wdev, *tmp;
300 u32 nlportid = item->nlportid;
302 list_del(&item->list);
304 spin_unlock_irq(&rdev->destroy_list_lock);
306 list_for_each_entry_safe(wdev, tmp,
307 &rdev->wiphy.wdev_list, list) {
308 if (nlportid == wdev->owner_nlportid)
309 rdev_del_virtual_intf(rdev, wdev);
312 spin_lock_irq(&rdev->destroy_list_lock);
314 spin_unlock_irq(&rdev->destroy_list_lock);
317 static void cfg80211_destroy_iface_wk(struct work_struct *work)
319 struct cfg80211_registered_device *rdev;
321 rdev = container_of(work, struct cfg80211_registered_device,
325 cfg80211_destroy_ifaces(rdev);
329 static void cfg80211_sched_scan_stop_wk(struct work_struct *work)
331 struct cfg80211_registered_device *rdev;
333 rdev = container_of(work, struct cfg80211_registered_device,
338 __cfg80211_stop_sched_scan(rdev, false);
343 /* exported functions */
345 struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv,
346 const char *requested_name)
348 static atomic_t wiphy_counter = ATOMIC_INIT(0);
350 struct cfg80211_registered_device *rdev;
353 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
354 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
355 WARN_ON(ops->connect && !ops->disconnect);
356 WARN_ON(ops->join_ibss && !ops->leave_ibss);
357 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
358 WARN_ON(ops->add_station && !ops->del_station);
359 WARN_ON(ops->add_mpath && !ops->del_mpath);
360 WARN_ON(ops->join_mesh && !ops->leave_mesh);
362 alloc_size = sizeof(*rdev) + sizeof_priv;
364 rdev = kzalloc(alloc_size, GFP_KERNEL);
370 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter);
372 if (unlikely(rdev->wiphy_idx < 0)) {
374 atomic_dec(&wiphy_counter);
379 /* atomic_inc_return makes it start at 1, make it start at 0 */
382 /* give it a proper name */
383 if (requested_name && requested_name[0]) {
387 rv = cfg80211_dev_check_name(rdev, requested_name);
391 goto use_default_name;
394 rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name);
397 goto use_default_name;
402 /* NOTE: This is *probably* safe w/out holding rtnl because of
403 * the restrictions on phy names. Probably this call could
404 * fail if some other part of the kernel (re)named a device
405 * phyX. But, might should add some locking and check return
406 * value, and use a different name if this one exists?
408 rv = dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
415 INIT_LIST_HEAD(&rdev->wiphy.wdev_list);
416 INIT_LIST_HEAD(&rdev->beacon_registrations);
417 spin_lock_init(&rdev->beacon_registrations_lock);
418 spin_lock_init(&rdev->bss_lock);
419 INIT_LIST_HEAD(&rdev->bss_list);
420 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
421 INIT_WORK(&rdev->sched_scan_results_wk, __cfg80211_sched_scan_results);
422 INIT_LIST_HEAD(&rdev->mlme_unreg);
423 spin_lock_init(&rdev->mlme_unreg_lock);
424 INIT_WORK(&rdev->mlme_unreg_wk, cfg80211_mlme_unreg_wk);
425 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk,
426 cfg80211_dfs_channels_update_work);
427 #ifdef CONFIG_CFG80211_WEXT
428 rdev->wiphy.wext = &cfg80211_wext_handler;
431 device_initialize(&rdev->wiphy.dev);
432 rdev->wiphy.dev.class = &ieee80211_class;
433 rdev->wiphy.dev.platform_data = rdev;
434 device_enable_async_suspend(&rdev->wiphy.dev);
436 INIT_LIST_HEAD(&rdev->destroy_list);
437 spin_lock_init(&rdev->destroy_list_lock);
438 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk);
439 INIT_WORK(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk);
441 #ifdef CONFIG_CFG80211_DEFAULT_PS
442 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
445 wiphy_net_set(&rdev->wiphy, &init_net);
447 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
448 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
449 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
450 &rdev->rfkill_ops, rdev);
457 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
458 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
459 INIT_WORK(&rdev->event_work, cfg80211_event_work);
461 init_waitqueue_head(&rdev->dev_wait);
464 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
465 * Fragmentation and RTS threshold are disabled by default with the
468 rdev->wiphy.retry_short = 7;
469 rdev->wiphy.retry_long = 4;
470 rdev->wiphy.frag_threshold = (u32) -1;
471 rdev->wiphy.rts_threshold = (u32) -1;
472 rdev->wiphy.coverage_class = 0;
474 rdev->wiphy.max_num_csa_counters = 1;
476 rdev->wiphy.max_sched_scan_plans = 1;
477 rdev->wiphy.max_sched_scan_plan_interval = U32_MAX;
481 EXPORT_SYMBOL(wiphy_new_nm);
483 static int wiphy_verify_combinations(struct wiphy *wiphy)
485 const struct ieee80211_iface_combination *c;
488 for (i = 0; i < wiphy->n_iface_combinations; i++) {
492 c = &wiphy->iface_combinations[i];
495 * Combinations with just one interface aren't real,
496 * however we make an exception for DFS.
498 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths))
501 /* Need at least one channel */
502 if (WARN_ON(!c->num_different_channels))
506 * Put a sane limit on maximum number of different
507 * channels to simplify channel accounting code.
509 if (WARN_ON(c->num_different_channels >
510 CFG80211_MAX_NUM_DIFFERENT_CHANNELS))
513 /* DFS only works on one channel. */
514 if (WARN_ON(c->radar_detect_widths &&
515 (c->num_different_channels > 1)))
518 if (WARN_ON(!c->n_limits))
521 for (j = 0; j < c->n_limits; j++) {
522 u16 types = c->limits[j].types;
524 /* interface types shouldn't overlap */
525 if (WARN_ON(types & all_iftypes))
527 all_iftypes |= types;
529 if (WARN_ON(!c->limits[j].max))
532 /* Shouldn't list software iftypes in combinations! */
533 if (WARN_ON(wiphy->software_iftypes & types))
536 /* Only a single P2P_DEVICE can be allowed */
537 if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) &&
538 c->limits[j].max > 1))
541 cnt += c->limits[j].max;
543 * Don't advertise an unsupported type
546 if (WARN_ON((wiphy->interface_modes & types) != types))
550 /* You can't even choose that many! */
551 if (WARN_ON(cnt < c->max_interfaces))
558 int wiphy_register(struct wiphy *wiphy)
560 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
562 enum ieee80211_band band;
563 struct ieee80211_supported_band *sband;
564 bool have_band = false;
566 u16 ifmodes = wiphy->interface_modes;
569 if (WARN_ON(wiphy->wowlan &&
570 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
571 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
573 if (WARN_ON(wiphy->wowlan &&
574 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns &&
575 !wiphy->wowlan->tcp))
578 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
579 (!rdev->ops->tdls_channel_switch ||
580 !rdev->ops->tdls_cancel_channel_switch)))
584 * if a wiphy has unsupported modes for regulatory channel enforcement,
585 * opt-out of enforcement checking
587 if (wiphy->interface_modes & ~(BIT(NL80211_IFTYPE_STATION) |
588 BIT(NL80211_IFTYPE_P2P_CLIENT) |
589 BIT(NL80211_IFTYPE_AP) |
590 BIT(NL80211_IFTYPE_P2P_GO) |
591 BIT(NL80211_IFTYPE_ADHOC) |
592 BIT(NL80211_IFTYPE_P2P_DEVICE) |
593 BIT(NL80211_IFTYPE_AP_VLAN) |
594 BIT(NL80211_IFTYPE_MONITOR)))
595 wiphy->regulatory_flags |= REGULATORY_IGNORE_STALE_KICKOFF;
597 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) &&
598 (wiphy->regulatory_flags &
599 (REGULATORY_CUSTOM_REG |
600 REGULATORY_STRICT_REG |
601 REGULATORY_COUNTRY_IE_FOLLOW_POWER |
602 REGULATORY_COUNTRY_IE_IGNORE))))
605 if (WARN_ON(wiphy->coalesce &&
606 (!wiphy->coalesce->n_rules ||
607 !wiphy->coalesce->n_patterns) &&
608 (!wiphy->coalesce->pattern_min_len ||
609 wiphy->coalesce->pattern_min_len >
610 wiphy->coalesce->pattern_max_len)))
613 if (WARN_ON(wiphy->ap_sme_capa &&
614 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
617 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
620 if (WARN_ON(wiphy->addresses &&
621 !is_zero_ether_addr(wiphy->perm_addr) &&
622 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
626 if (WARN_ON(wiphy->max_acl_mac_addrs &&
627 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) ||
628 !rdev->ops->set_mac_acl)))
631 /* assure only valid behaviours are flagged by driver
632 * hence subtract 2 as bit 0 is invalid.
634 if (WARN_ON(wiphy->bss_select_support &&
635 (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2))))
638 if (wiphy->addresses)
639 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
641 /* sanity check ifmodes */
643 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
644 if (WARN_ON(ifmodes != wiphy->interface_modes))
645 wiphy->interface_modes = ifmodes;
647 res = wiphy_verify_combinations(wiphy);
651 /* sanity check supported bands/channels */
652 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
653 sband = wiphy->bands[band];
658 if (WARN_ON(!sband->n_channels))
661 * on 60GHz band, there are no legacy rates, so
664 if (WARN_ON(band != IEEE80211_BAND_60GHZ &&
669 * Since cfg80211_disable_40mhz_24ghz is global, we can
670 * modify the sband's ht data even if the driver uses a
671 * global structure for that.
673 if (cfg80211_disable_40mhz_24ghz &&
674 band == IEEE80211_BAND_2GHZ &&
675 sband->ht_cap.ht_supported) {
676 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
677 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
681 * Since we use a u32 for rate bitmaps in
682 * ieee80211_get_response_rate, we cannot
683 * have more than 32 legacy rates.
685 if (WARN_ON(sband->n_bitrates > 32))
688 for (i = 0; i < sband->n_channels; i++) {
689 sband->channels[i].orig_flags =
690 sband->channels[i].flags;
691 sband->channels[i].orig_mag = INT_MAX;
692 sband->channels[i].orig_mpwr =
693 sband->channels[i].max_power;
694 sband->channels[i].band = band;
706 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns &&
707 (!rdev->wiphy.wowlan->pattern_min_len ||
708 rdev->wiphy.wowlan->pattern_min_len >
709 rdev->wiphy.wowlan->pattern_max_len)))
713 /* check and set up bitrates */
714 ieee80211_set_bitrate_flags(wiphy);
716 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH;
719 res = device_add(&rdev->wiphy.dev);
725 /* set up regulatory info */
726 wiphy_regulatory_register(wiphy);
728 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
729 cfg80211_rdev_list_generation++;
732 rdev->wiphy.debugfsdir =
733 debugfs_create_dir(wiphy_name(&rdev->wiphy),
734 ieee80211_debugfs_dir);
735 if (IS_ERR(rdev->wiphy.debugfsdir))
736 rdev->wiphy.debugfsdir = NULL;
738 cfg80211_debugfs_rdev_add(rdev);
739 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
741 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
742 struct regulatory_request request;
744 request.wiphy_idx = get_wiphy_idx(wiphy);
745 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
746 request.alpha2[0] = '9';
747 request.alpha2[1] = '9';
749 nl80211_send_reg_change_event(&request);
752 /* Check that nobody globally advertises any capabilities they do not
753 * advertise on all possible interface types.
755 if (wiphy->extended_capabilities_len &&
756 wiphy->num_iftype_ext_capab &&
757 wiphy->iftype_ext_capab) {
758 u8 supported_on_all, j;
759 const struct wiphy_iftype_ext_capab *capab;
761 capab = wiphy->iftype_ext_capab;
762 for (j = 0; j < wiphy->extended_capabilities_len; j++) {
763 if (capab[0].extended_capabilities_len > j)
765 capab[0].extended_capabilities[j];
767 supported_on_all = 0x00;
768 for (i = 1; i < wiphy->num_iftype_ext_capab; i++) {
769 if (j >= capab[i].extended_capabilities_len) {
770 supported_on_all = 0x00;
774 capab[i].extended_capabilities[j];
776 if (WARN_ON(wiphy->extended_capabilities[j] &
782 rdev->wiphy.registered = true;
785 res = rfkill_register(rdev->rfkill);
787 rfkill_destroy(rdev->rfkill);
789 wiphy_unregister(&rdev->wiphy);
795 EXPORT_SYMBOL(wiphy_register);
797 void wiphy_rfkill_start_polling(struct wiphy *wiphy)
799 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
801 if (!rdev->ops->rfkill_poll)
803 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
804 rfkill_resume_polling(rdev->rfkill);
806 EXPORT_SYMBOL(wiphy_rfkill_start_polling);
808 void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
810 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
812 rfkill_pause_polling(rdev->rfkill);
814 EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
816 void wiphy_unregister(struct wiphy *wiphy)
818 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
820 wait_event(rdev->dev_wait, ({
823 __count = rdev->opencount;
828 rfkill_unregister(rdev->rfkill);
831 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
832 rdev->wiphy.registered = false;
834 WARN_ON(!list_empty(&rdev->wiphy.wdev_list));
837 * First remove the hardware from everywhere, this makes
838 * it impossible to find from userspace.
840 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
841 list_del_rcu(&rdev->list);
845 * If this device got a regulatory hint tell core its
846 * free to listen now to a new shiny device regulatory hint
848 wiphy_regulatory_deregister(wiphy);
850 cfg80211_rdev_list_generation++;
851 device_del(&rdev->wiphy.dev);
855 flush_work(&rdev->scan_done_wk);
856 cancel_work_sync(&rdev->conn_work);
857 flush_work(&rdev->event_work);
858 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
859 flush_work(&rdev->destroy_work);
860 flush_work(&rdev->sched_scan_stop_wk);
861 flush_work(&rdev->mlme_unreg_wk);
864 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
865 rdev_set_wakeup(rdev, false);
867 cfg80211_rdev_free_wowlan(rdev);
868 cfg80211_rdev_free_coalesce(rdev);
870 EXPORT_SYMBOL(wiphy_unregister);
872 void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
874 struct cfg80211_internal_bss *scan, *tmp;
875 struct cfg80211_beacon_registration *reg, *treg;
876 rfkill_destroy(rdev->rfkill);
877 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
878 list_del(®->list);
881 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
882 cfg80211_put_bss(&rdev->wiphy, &scan->pub);
886 void wiphy_free(struct wiphy *wiphy)
888 put_device(&wiphy->dev);
890 EXPORT_SYMBOL(wiphy_free);
892 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
894 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
896 if (rfkill_set_hw_state(rdev->rfkill, blocked))
897 schedule_work(&rdev->rfkill_sync);
899 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
901 void cfg80211_unregister_wdev(struct wireless_dev *wdev)
903 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
907 if (WARN_ON(wdev->netdev))
910 list_del_rcu(&wdev->list);
911 rdev->devlist_generation++;
913 switch (wdev->iftype) {
914 case NL80211_IFTYPE_P2P_DEVICE:
915 cfg80211_mlme_purge_registrations(wdev);
916 cfg80211_stop_p2p_device(rdev, wdev);
923 EXPORT_SYMBOL(cfg80211_unregister_wdev);
925 static const struct device_type wiphy_type = {
929 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
930 enum nl80211_iftype iftype, int num)
934 rdev->num_running_ifaces += num;
935 if (iftype == NL80211_IFTYPE_MONITOR)
936 rdev->num_running_monitor_ifaces += num;
939 void __cfg80211_leave(struct cfg80211_registered_device *rdev,
940 struct wireless_dev *wdev)
942 struct net_device *dev = wdev->netdev;
943 struct cfg80211_sched_scan_request *sched_scan_req;
946 ASSERT_WDEV_LOCK(wdev);
948 switch (wdev->iftype) {
949 case NL80211_IFTYPE_ADHOC:
950 __cfg80211_leave_ibss(rdev, dev, true);
952 case NL80211_IFTYPE_P2P_CLIENT:
953 case NL80211_IFTYPE_STATION:
954 sched_scan_req = rtnl_dereference(rdev->sched_scan_req);
955 if (sched_scan_req && dev == sched_scan_req->dev)
956 __cfg80211_stop_sched_scan(rdev, false);
957 #ifdef CONFIG_CFG80211_WEXT
958 kfree(wdev->wext.ie);
959 wdev->wext.ie = NULL;
960 wdev->wext.ie_len = 0;
961 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
963 cfg80211_disconnect(rdev, dev,
964 WLAN_REASON_DEAUTH_LEAVING, true);
965 cfg80211_mlme_down(rdev, dev);
967 case NL80211_IFTYPE_MESH_POINT:
968 __cfg80211_leave_mesh(rdev, dev);
970 case NL80211_IFTYPE_AP:
971 case NL80211_IFTYPE_P2P_GO:
972 __cfg80211_stop_ap(rdev, dev, true);
974 case NL80211_IFTYPE_OCB:
975 __cfg80211_leave_ocb(rdev, dev);
977 case NL80211_IFTYPE_WDS:
978 /* must be handled by mac80211/driver, has no APIs */
980 case NL80211_IFTYPE_P2P_DEVICE:
981 /* cannot happen, has no netdev */
983 case NL80211_IFTYPE_AP_VLAN:
984 case NL80211_IFTYPE_MONITOR:
987 case NL80211_IFTYPE_UNSPECIFIED:
988 case NUM_NL80211_IFTYPES:
992 wdev->beacon_interval = 0;
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;
1084 INIT_WORK(&wdev->disconnect_wk, cfg80211_autodisconnect_wk);
1086 case NETDEV_GOING_DOWN:
1087 cfg80211_leave(rdev, wdev);
1090 cfg80211_update_iface_num(rdev, wdev->iftype, -1);
1091 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
1092 if (WARN_ON(!rdev->scan_req->notified))
1093 rdev->scan_req->aborted = true;
1094 ___cfg80211_scan_done(rdev, false);
1097 sched_scan_req = rtnl_dereference(rdev->sched_scan_req);
1098 if (WARN_ON(sched_scan_req &&
1099 sched_scan_req->dev == wdev->netdev)) {
1100 __cfg80211_stop_sched_scan(rdev, false);
1104 wake_up(&rdev->dev_wait);
1107 cfg80211_update_iface_num(rdev, wdev->iftype, 1);
1109 switch (wdev->iftype) {
1110 #ifdef CONFIG_CFG80211_WEXT
1111 case NL80211_IFTYPE_ADHOC:
1112 cfg80211_ibss_wext_join(rdev, wdev);
1114 case NL80211_IFTYPE_STATION:
1115 cfg80211_mgd_wext_connect(rdev, wdev);
1118 #ifdef CONFIG_MAC80211_MESH
1119 case NL80211_IFTYPE_MESH_POINT:
1121 /* backward compat code... */
1122 struct mesh_setup setup;
1123 memcpy(&setup, &default_mesh_setup,
1125 /* back compat only needed for mesh_id */
1126 setup.mesh_id = wdev->ssid;
1127 setup.mesh_id_len = wdev->mesh_id_up_len;
1128 if (wdev->mesh_id_up_len)
1129 __cfg80211_join_mesh(rdev, dev,
1131 &default_mesh_config);
1142 * Configure power management to the driver here so that its
1143 * correctly set also after interface type changes etc.
1145 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1146 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
1147 rdev->ops->set_power_mgmt)
1148 if (rdev_set_power_mgmt(rdev, dev, wdev->ps,
1149 wdev->ps_timeout)) {
1150 /* assume this means it's off */
1154 case NETDEV_UNREGISTER:
1156 * It is possible to get NETDEV_UNREGISTER
1157 * multiple times. To detect that, check
1158 * that the interface is still on the list
1159 * of registered interfaces, and only then
1160 * remove and clean it up.
1162 if (!list_empty(&wdev->list)) {
1163 sysfs_remove_link(&dev->dev.kobj, "phy80211");
1164 list_del_rcu(&wdev->list);
1165 rdev->devlist_generation++;
1166 cfg80211_mlme_purge_registrations(wdev);
1167 #ifdef CONFIG_CFG80211_WEXT
1168 kzfree(wdev->wext.keys);
1170 flush_work(&wdev->disconnect_wk);
1173 * synchronise (so that we won't find this netdev
1174 * from other code any more) and then clear the list
1175 * head so that the above code can safely check for
1176 * !list_empty() to avoid double-cleanup.
1179 INIT_LIST_HEAD(&wdev->list);
1181 * Ensure that all events have been processed and
1184 cfg80211_process_wdev_events(wdev);
1186 if (WARN_ON(wdev->current_bss)) {
1187 cfg80211_unhold_bss(wdev->current_bss);
1188 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
1189 wdev->current_bss = NULL;
1193 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
1194 return notifier_from_errno(-EOPNOTSUPP);
1195 if (rfkill_blocked(rdev->rfkill))
1196 return notifier_from_errno(-ERFKILL);
1202 wireless_nlevent_flush();
1207 static struct notifier_block cfg80211_netdev_notifier = {
1208 .notifier_call = cfg80211_netdev_notifier_call,
1211 static void __net_exit cfg80211_pernet_exit(struct net *net)
1213 struct cfg80211_registered_device *rdev;
1216 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1217 if (net_eq(wiphy_net(&rdev->wiphy), net))
1218 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
1223 static struct pernet_operations cfg80211_pernet_ops = {
1224 .exit = cfg80211_pernet_exit,
1227 static int __init cfg80211_init(void)
1231 err = register_pernet_device(&cfg80211_pernet_ops);
1233 goto out_fail_pernet;
1235 err = wiphy_sysfs_init();
1237 goto out_fail_sysfs;
1239 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
1241 goto out_fail_notifier;
1243 err = nl80211_init();
1245 goto out_fail_nl80211;
1247 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
1249 err = regulatory_init();
1253 cfg80211_wq = create_singlethread_workqueue("cfg80211");
1264 debugfs_remove(ieee80211_debugfs_dir);
1267 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1271 unregister_pernet_device(&cfg80211_pernet_ops);
1275 subsys_initcall(cfg80211_init);
1277 static void __exit cfg80211_exit(void)
1279 debugfs_remove(ieee80211_debugfs_dir);
1281 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1284 unregister_pernet_device(&cfg80211_pernet_ops);
1285 destroy_workqueue(cfg80211_wq);
1287 module_exit(cfg80211_exit);