2 * This is the linux wireless configuration interface.
4 * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
7 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
10 #include <linux/module.h>
11 #include <linux/err.h>
12 #include <linux/list.h>
13 #include <linux/slab.h>
14 #include <linux/nl80211.h>
15 #include <linux/debugfs.h>
16 #include <linux/notifier.h>
17 #include <linux/device.h>
18 #include <linux/etherdevice.h>
19 #include <linux/rtnetlink.h>
20 #include <linux/sched.h>
21 #include <net/genetlink.h>
22 #include <net/cfg80211.h>
27 #include "wext-compat.h"
31 /* name for sysfs, %d is appended */
32 #define PHY_NAME "phy"
34 MODULE_AUTHOR("Johannes Berg");
35 MODULE_LICENSE("GPL");
36 MODULE_DESCRIPTION("wireless configuration support");
37 MODULE_ALIAS_GENL_FAMILY(NL80211_GENL_NAME);
39 /* RCU-protected (and RTNL for writers) */
40 LIST_HEAD(cfg80211_rdev_list);
41 int cfg80211_rdev_list_generation;
44 static struct dentry *ieee80211_debugfs_dir;
46 /* for the cleanup, scan and event works */
47 struct workqueue_struct *cfg80211_wq;
49 static bool cfg80211_disable_40mhz_24ghz;
50 module_param(cfg80211_disable_40mhz_24ghz, bool, 0644);
51 MODULE_PARM_DESC(cfg80211_disable_40mhz_24ghz,
52 "Disable 40MHz support in the 2.4GHz band");
54 struct cfg80211_registered_device *cfg80211_rdev_by_wiphy_idx(int wiphy_idx)
56 struct cfg80211_registered_device *result = NULL, *rdev;
60 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
61 if (rdev->wiphy_idx == wiphy_idx) {
70 int get_wiphy_idx(struct wiphy *wiphy)
72 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
74 return rdev->wiphy_idx;
77 struct wiphy *wiphy_idx_to_wiphy(int wiphy_idx)
79 struct cfg80211_registered_device *rdev;
83 rdev = cfg80211_rdev_by_wiphy_idx(wiphy_idx);
89 int cfg80211_dev_rename(struct cfg80211_registered_device *rdev,
92 struct cfg80211_registered_device *rdev2;
93 int wiphy_idx, taken = -1, result, digits;
97 /* prohibit calling the thing phy%d when %d is not its number */
98 sscanf(newname, PHY_NAME "%d%n", &wiphy_idx, &taken);
99 if (taken == strlen(newname) && wiphy_idx != rdev->wiphy_idx) {
100 /* count number of places needed to print wiphy_idx */
102 while (wiphy_idx /= 10)
105 * deny the name if it is phy<idx> where <idx> is printed
106 * without leading zeroes. taken == strlen(newname) here
108 if (taken == strlen(PHY_NAME) + digits)
113 /* Ignore nop renames */
114 if (strcmp(newname, dev_name(&rdev->wiphy.dev)) == 0)
117 /* Ensure another device does not already have this name. */
118 list_for_each_entry(rdev2, &cfg80211_rdev_list, list)
119 if (strcmp(newname, dev_name(&rdev2->wiphy.dev)) == 0)
122 result = device_rename(&rdev->wiphy.dev, newname);
126 if (rdev->wiphy.debugfsdir &&
127 !debugfs_rename(rdev->wiphy.debugfsdir->d_parent,
128 rdev->wiphy.debugfsdir,
129 rdev->wiphy.debugfsdir->d_parent,
131 pr_err("failed to rename debugfs dir to %s!\n", newname);
133 nl80211_notify_dev_rename(rdev);
138 int cfg80211_switch_netns(struct cfg80211_registered_device *rdev,
141 struct wireless_dev *wdev;
144 if (!(rdev->wiphy.flags & WIPHY_FLAG_NETNS_OK))
147 list_for_each_entry(wdev, &rdev->wdev_list, list) {
150 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
151 err = dev_change_net_namespace(wdev->netdev, net, "wlan%d");
154 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
158 /* failed -- clean up to old netns */
159 net = wiphy_net(&rdev->wiphy);
161 list_for_each_entry_continue_reverse(wdev, &rdev->wdev_list,
165 wdev->netdev->features &= ~NETIF_F_NETNS_LOCAL;
166 err = dev_change_net_namespace(wdev->netdev, net,
169 wdev->netdev->features |= NETIF_F_NETNS_LOCAL;
175 wiphy_net_set(&rdev->wiphy, net);
177 err = device_rename(&rdev->wiphy.dev, dev_name(&rdev->wiphy.dev));
183 static void cfg80211_rfkill_poll(struct rfkill *rfkill, void *data)
185 struct cfg80211_registered_device *rdev = data;
187 rdev_rfkill_poll(rdev);
190 void cfg80211_stop_p2p_device(struct cfg80211_registered_device *rdev,
191 struct wireless_dev *wdev)
195 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_P2P_DEVICE))
198 if (!wdev->p2p_started)
201 rdev_stop_p2p_device(rdev, wdev);
202 wdev->p2p_started = false;
206 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
207 if (WARN_ON(!rdev->scan_req->notified))
208 rdev->scan_req->aborted = true;
209 ___cfg80211_scan_done(rdev, false);
213 static int cfg80211_rfkill_set_block(void *data, bool blocked)
215 struct cfg80211_registered_device *rdev = data;
216 struct wireless_dev *wdev;
223 list_for_each_entry(wdev, &rdev->wdev_list, list) {
225 dev_close(wdev->netdev);
228 /* otherwise, check iftype */
229 switch (wdev->iftype) {
230 case NL80211_IFTYPE_P2P_DEVICE:
231 cfg80211_stop_p2p_device(rdev, wdev);
243 static void cfg80211_rfkill_sync_work(struct work_struct *work)
245 struct cfg80211_registered_device *rdev;
247 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync);
248 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
251 static void cfg80211_event_work(struct work_struct *work)
253 struct cfg80211_registered_device *rdev;
255 rdev = container_of(work, struct cfg80211_registered_device,
259 cfg80211_process_rdev_events(rdev);
263 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev)
265 struct cfg80211_iface_destroy *item;
269 spin_lock_irq(&rdev->destroy_list_lock);
270 while ((item = list_first_entry_or_null(&rdev->destroy_list,
271 struct cfg80211_iface_destroy,
273 struct wireless_dev *wdev, *tmp;
274 u32 nlportid = item->nlportid;
276 list_del(&item->list);
278 spin_unlock_irq(&rdev->destroy_list_lock);
280 list_for_each_entry_safe(wdev, tmp, &rdev->wdev_list, list) {
281 if (nlportid == wdev->owner_nlportid)
282 rdev_del_virtual_intf(rdev, wdev);
285 spin_lock_irq(&rdev->destroy_list_lock);
287 spin_unlock_irq(&rdev->destroy_list_lock);
290 static void cfg80211_destroy_iface_wk(struct work_struct *work)
292 struct cfg80211_registered_device *rdev;
294 rdev = container_of(work, struct cfg80211_registered_device,
298 cfg80211_destroy_ifaces(rdev);
302 /* exported functions */
304 struct wiphy *wiphy_new(const struct cfg80211_ops *ops, int sizeof_priv)
306 static atomic_t wiphy_counter = ATOMIC_INIT(0);
308 struct cfg80211_registered_device *rdev;
311 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
312 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
313 WARN_ON(ops->connect && !ops->disconnect);
314 WARN_ON(ops->join_ibss && !ops->leave_ibss);
315 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
316 WARN_ON(ops->add_station && !ops->del_station);
317 WARN_ON(ops->add_mpath && !ops->del_mpath);
318 WARN_ON(ops->join_mesh && !ops->leave_mesh);
320 alloc_size = sizeof(*rdev) + sizeof_priv;
322 rdev = kzalloc(alloc_size, GFP_KERNEL);
328 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter);
330 if (unlikely(rdev->wiphy_idx < 0)) {
332 atomic_dec(&wiphy_counter);
337 /* atomic_inc_return makes it start at 1, make it start at 0 */
340 /* give it a proper name */
341 dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
343 INIT_LIST_HEAD(&rdev->wdev_list);
344 INIT_LIST_HEAD(&rdev->beacon_registrations);
345 spin_lock_init(&rdev->beacon_registrations_lock);
346 spin_lock_init(&rdev->bss_lock);
347 INIT_LIST_HEAD(&rdev->bss_list);
348 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
349 INIT_WORK(&rdev->sched_scan_results_wk, __cfg80211_sched_scan_results);
350 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk,
351 cfg80211_dfs_channels_update_work);
352 #ifdef CONFIG_CFG80211_WEXT
353 rdev->wiphy.wext = &cfg80211_wext_handler;
356 device_initialize(&rdev->wiphy.dev);
357 rdev->wiphy.dev.class = &ieee80211_class;
358 rdev->wiphy.dev.platform_data = rdev;
360 INIT_LIST_HEAD(&rdev->destroy_list);
361 spin_lock_init(&rdev->destroy_list_lock);
362 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk);
364 #ifdef CONFIG_CFG80211_DEFAULT_PS
365 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
368 wiphy_net_set(&rdev->wiphy, &init_net);
370 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
371 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
372 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
373 &rdev->rfkill_ops, rdev);
380 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
381 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
382 INIT_WORK(&rdev->event_work, cfg80211_event_work);
384 init_waitqueue_head(&rdev->dev_wait);
387 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
388 * Fragmentation and RTS threshold are disabled by default with the
391 rdev->wiphy.retry_short = 7;
392 rdev->wiphy.retry_long = 4;
393 rdev->wiphy.frag_threshold = (u32) -1;
394 rdev->wiphy.rts_threshold = (u32) -1;
395 rdev->wiphy.coverage_class = 0;
399 EXPORT_SYMBOL(wiphy_new);
401 static int wiphy_verify_combinations(struct wiphy *wiphy)
403 const struct ieee80211_iface_combination *c;
406 for (i = 0; i < wiphy->n_iface_combinations; i++) {
410 c = &wiphy->iface_combinations[i];
413 * Combinations with just one interface aren't real,
414 * however we make an exception for DFS.
416 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths))
419 /* Need at least one channel */
420 if (WARN_ON(!c->num_different_channels))
424 * Put a sane limit on maximum number of different
425 * channels to simplify channel accounting code.
427 if (WARN_ON(c->num_different_channels >
428 CFG80211_MAX_NUM_DIFFERENT_CHANNELS))
431 /* DFS only works on one channel. */
432 if (WARN_ON(c->radar_detect_widths &&
433 (c->num_different_channels > 1)))
436 if (WARN_ON(!c->n_limits))
439 for (j = 0; j < c->n_limits; j++) {
440 u16 types = c->limits[j].types;
442 /* interface types shouldn't overlap */
443 if (WARN_ON(types & all_iftypes))
445 all_iftypes |= types;
447 if (WARN_ON(!c->limits[j].max))
450 /* Shouldn't list software iftypes in combinations! */
451 if (WARN_ON(wiphy->software_iftypes & types))
454 /* Only a single P2P_DEVICE can be allowed */
455 if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) &&
456 c->limits[j].max > 1))
459 cnt += c->limits[j].max;
461 * Don't advertise an unsupported type
464 if (WARN_ON((wiphy->interface_modes & types) != types))
468 /* You can't even choose that many! */
469 if (WARN_ON(cnt < c->max_interfaces))
476 int wiphy_register(struct wiphy *wiphy)
478 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
480 enum ieee80211_band band;
481 struct ieee80211_supported_band *sband;
482 bool have_band = false;
484 u16 ifmodes = wiphy->interface_modes;
487 * There are major locking problems in nl80211/mac80211 for CSA,
488 * disable for all drivers until this has been reworked.
490 wiphy->flags &= ~WIPHY_FLAG_HAS_CHANNEL_SWITCH;
493 if (WARN_ON(wiphy->wowlan &&
494 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
495 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
497 if (WARN_ON(wiphy->wowlan &&
498 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns &&
499 !wiphy->wowlan->tcp))
503 if (WARN_ON(wiphy->coalesce &&
504 (!wiphy->coalesce->n_rules ||
505 !wiphy->coalesce->n_patterns) &&
506 (!wiphy->coalesce->pattern_min_len ||
507 wiphy->coalesce->pattern_min_len >
508 wiphy->coalesce->pattern_max_len)))
511 if (WARN_ON(wiphy->ap_sme_capa &&
512 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
515 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
518 if (WARN_ON(wiphy->addresses &&
519 !is_zero_ether_addr(wiphy->perm_addr) &&
520 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
524 if (WARN_ON(wiphy->max_acl_mac_addrs &&
525 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) ||
526 !rdev->ops->set_mac_acl)))
529 if (wiphy->addresses)
530 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
532 /* sanity check ifmodes */
534 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
535 if (WARN_ON(ifmodes != wiphy->interface_modes))
536 wiphy->interface_modes = ifmodes;
538 res = wiphy_verify_combinations(wiphy);
542 /* sanity check supported bands/channels */
543 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
544 sband = wiphy->bands[band];
549 if (WARN_ON(!sband->n_channels))
552 * on 60gHz band, there are no legacy rates, so
555 if (WARN_ON(band != IEEE80211_BAND_60GHZ &&
560 * Since cfg80211_disable_40mhz_24ghz is global, we can
561 * modify the sband's ht data even if the driver uses a
562 * global structure for that.
564 if (cfg80211_disable_40mhz_24ghz &&
565 band == IEEE80211_BAND_2GHZ &&
566 sband->ht_cap.ht_supported) {
567 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
568 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
572 * Since we use a u32 for rate bitmaps in
573 * ieee80211_get_response_rate, we cannot
574 * have more than 32 legacy rates.
576 if (WARN_ON(sband->n_bitrates > 32))
579 for (i = 0; i < sband->n_channels; i++) {
580 sband->channels[i].orig_flags =
581 sband->channels[i].flags;
582 sband->channels[i].orig_mag = INT_MAX;
583 sband->channels[i].orig_mpwr =
584 sband->channels[i].max_power;
585 sband->channels[i].band = band;
597 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns &&
598 (!rdev->wiphy.wowlan->pattern_min_len ||
599 rdev->wiphy.wowlan->pattern_min_len >
600 rdev->wiphy.wowlan->pattern_max_len)))
604 /* check and set up bitrates */
605 ieee80211_set_bitrate_flags(wiphy);
607 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH;
610 res = device_add(&rdev->wiphy.dev);
616 /* set up regulatory info */
617 wiphy_regulatory_register(wiphy);
619 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
620 cfg80211_rdev_list_generation++;
623 rdev->wiphy.debugfsdir =
624 debugfs_create_dir(wiphy_name(&rdev->wiphy),
625 ieee80211_debugfs_dir);
626 if (IS_ERR(rdev->wiphy.debugfsdir))
627 rdev->wiphy.debugfsdir = NULL;
629 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
630 struct regulatory_request request;
632 request.wiphy_idx = get_wiphy_idx(wiphy);
633 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
634 request.alpha2[0] = '9';
635 request.alpha2[1] = '9';
637 nl80211_send_reg_change_event(&request);
640 cfg80211_debugfs_rdev_add(rdev);
642 rdev->wiphy.registered = true;
645 res = rfkill_register(rdev->rfkill);
647 rfkill_destroy(rdev->rfkill);
649 wiphy_unregister(&rdev->wiphy);
655 EXPORT_SYMBOL(wiphy_register);
657 void wiphy_rfkill_start_polling(struct wiphy *wiphy)
659 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
661 if (!rdev->ops->rfkill_poll)
663 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
664 rfkill_resume_polling(rdev->rfkill);
666 EXPORT_SYMBOL(wiphy_rfkill_start_polling);
668 void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
670 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
672 rfkill_pause_polling(rdev->rfkill);
674 EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
676 void wiphy_unregister(struct wiphy *wiphy)
678 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
680 wait_event(rdev->dev_wait, ({
683 __count = rdev->opencount;
688 rfkill_unregister(rdev->rfkill);
691 rdev->wiphy.registered = false;
693 WARN_ON(!list_empty(&rdev->wdev_list));
696 * First remove the hardware from everywhere, this makes
697 * it impossible to find from userspace.
699 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
700 list_del_rcu(&rdev->list);
704 * If this device got a regulatory hint tell core its
705 * free to listen now to a new shiny device regulatory hint
707 wiphy_regulatory_deregister(wiphy);
709 cfg80211_rdev_list_generation++;
710 device_del(&rdev->wiphy.dev);
714 flush_work(&rdev->scan_done_wk);
715 cancel_work_sync(&rdev->conn_work);
716 flush_work(&rdev->event_work);
717 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
718 flush_work(&rdev->destroy_work);
721 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
722 rdev_set_wakeup(rdev, false);
724 cfg80211_rdev_free_wowlan(rdev);
725 cfg80211_rdev_free_coalesce(rdev);
727 EXPORT_SYMBOL(wiphy_unregister);
729 void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
731 struct cfg80211_internal_bss *scan, *tmp;
732 struct cfg80211_beacon_registration *reg, *treg;
733 rfkill_destroy(rdev->rfkill);
734 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
735 list_del(®->list);
738 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
739 cfg80211_put_bss(&rdev->wiphy, &scan->pub);
743 void wiphy_free(struct wiphy *wiphy)
745 put_device(&wiphy->dev);
747 EXPORT_SYMBOL(wiphy_free);
749 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
751 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
753 if (rfkill_set_hw_state(rdev->rfkill, blocked))
754 schedule_work(&rdev->rfkill_sync);
756 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
758 void cfg80211_unregister_wdev(struct wireless_dev *wdev)
760 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
764 if (WARN_ON(wdev->netdev))
767 list_del_rcu(&wdev->list);
768 rdev->devlist_generation++;
770 switch (wdev->iftype) {
771 case NL80211_IFTYPE_P2P_DEVICE:
772 cfg80211_stop_p2p_device(rdev, wdev);
779 EXPORT_SYMBOL(cfg80211_unregister_wdev);
781 static const struct device_type wiphy_type = {
785 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
786 enum nl80211_iftype iftype, int num)
790 rdev->num_running_ifaces += num;
791 if (iftype == NL80211_IFTYPE_MONITOR)
792 rdev->num_running_monitor_ifaces += num;
795 void cfg80211_leave(struct cfg80211_registered_device *rdev,
796 struct wireless_dev *wdev)
798 struct net_device *dev = wdev->netdev;
802 switch (wdev->iftype) {
803 case NL80211_IFTYPE_ADHOC:
804 cfg80211_leave_ibss(rdev, dev, true);
806 case NL80211_IFTYPE_P2P_CLIENT:
807 case NL80211_IFTYPE_STATION:
808 if (rdev->sched_scan_req && dev == rdev->sched_scan_req->dev)
809 __cfg80211_stop_sched_scan(rdev, false);
812 #ifdef CONFIG_CFG80211_WEXT
813 kfree(wdev->wext.ie);
814 wdev->wext.ie = NULL;
815 wdev->wext.ie_len = 0;
816 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
818 cfg80211_disconnect(rdev, dev,
819 WLAN_REASON_DEAUTH_LEAVING, true);
822 case NL80211_IFTYPE_MESH_POINT:
823 cfg80211_leave_mesh(rdev, dev);
825 case NL80211_IFTYPE_AP:
826 case NL80211_IFTYPE_P2P_GO:
827 cfg80211_stop_ap(rdev, dev, true);
834 static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
835 unsigned long state, void *ptr)
837 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
838 struct wireless_dev *wdev = dev->ieee80211_ptr;
839 struct cfg80211_registered_device *rdev;
844 rdev = wiphy_to_rdev(wdev->wiphy);
846 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
849 case NETDEV_POST_INIT:
850 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
852 case NETDEV_REGISTER:
854 * NB: cannot take rdev->mtx here because this may be
855 * called within code protected by it when interfaces
856 * are added with nl80211.
858 mutex_init(&wdev->mtx);
859 INIT_LIST_HEAD(&wdev->event_list);
860 spin_lock_init(&wdev->event_lock);
861 INIT_LIST_HEAD(&wdev->mgmt_registrations);
862 spin_lock_init(&wdev->mgmt_registrations_lock);
864 wdev->identifier = ++rdev->wdev_id;
865 list_add_rcu(&wdev->list, &rdev->wdev_list);
866 rdev->devlist_generation++;
867 /* can only change netns with wiphy */
868 dev->features |= NETIF_F_NETNS_LOCAL;
870 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
872 pr_err("failed to add phy80211 symlink to netdev!\n");
875 #ifdef CONFIG_CFG80211_WEXT
876 wdev->wext.default_key = -1;
877 wdev->wext.default_mgmt_key = -1;
878 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
881 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
885 /* allow mac80211 to determine the timeout */
886 wdev->ps_timeout = -1;
888 netdev_set_default_ethtool_ops(dev, &cfg80211_ethtool_ops);
890 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
891 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
892 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
893 dev->priv_flags |= IFF_DONT_BRIDGE;
895 case NETDEV_GOING_DOWN:
896 cfg80211_leave(rdev, wdev);
899 cfg80211_update_iface_num(rdev, wdev->iftype, -1);
900 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
901 if (WARN_ON(!rdev->scan_req->notified))
902 rdev->scan_req->aborted = true;
903 ___cfg80211_scan_done(rdev, false);
906 if (WARN_ON(rdev->sched_scan_req &&
907 rdev->sched_scan_req->dev == wdev->netdev)) {
908 __cfg80211_stop_sched_scan(rdev, false);
912 wake_up(&rdev->dev_wait);
915 cfg80211_update_iface_num(rdev, wdev->iftype, 1);
917 switch (wdev->iftype) {
918 #ifdef CONFIG_CFG80211_WEXT
919 case NL80211_IFTYPE_ADHOC:
920 cfg80211_ibss_wext_join(rdev, wdev);
922 case NL80211_IFTYPE_STATION:
923 cfg80211_mgd_wext_connect(rdev, wdev);
926 #ifdef CONFIG_MAC80211_MESH
927 case NL80211_IFTYPE_MESH_POINT:
929 /* backward compat code... */
930 struct mesh_setup setup;
931 memcpy(&setup, &default_mesh_setup,
933 /* back compat only needed for mesh_id */
934 setup.mesh_id = wdev->ssid;
935 setup.mesh_id_len = wdev->mesh_id_up_len;
936 if (wdev->mesh_id_up_len)
937 __cfg80211_join_mesh(rdev, dev,
939 &default_mesh_config);
950 * Configure power management to the driver here so that its
951 * correctly set also after interface type changes etc.
953 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
954 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
955 rdev->ops->set_power_mgmt)
956 if (rdev_set_power_mgmt(rdev, dev, wdev->ps,
958 /* assume this means it's off */
962 case NETDEV_UNREGISTER:
964 * It is possible to get NETDEV_UNREGISTER
965 * multiple times. To detect that, check
966 * that the interface is still on the list
967 * of registered interfaces, and only then
968 * remove and clean it up.
970 if (!list_empty(&wdev->list)) {
971 sysfs_remove_link(&dev->dev.kobj, "phy80211");
972 list_del_rcu(&wdev->list);
973 rdev->devlist_generation++;
974 cfg80211_mlme_purge_registrations(wdev);
975 #ifdef CONFIG_CFG80211_WEXT
976 kfree(wdev->wext.keys);
980 * synchronise (so that we won't find this netdev
981 * from other code any more) and then clear the list
982 * head so that the above code can safely check for
983 * !list_empty() to avoid double-cleanup.
986 INIT_LIST_HEAD(&wdev->list);
988 * Ensure that all events have been processed and
991 cfg80211_process_wdev_events(wdev);
993 if (WARN_ON(wdev->current_bss)) {
994 cfg80211_unhold_bss(wdev->current_bss);
995 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
996 wdev->current_bss = NULL;
1000 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
1001 return notifier_from_errno(-EOPNOTSUPP);
1002 if (rfkill_blocked(rdev->rfkill))
1003 return notifier_from_errno(-ERFKILL);
1012 static struct notifier_block cfg80211_netdev_notifier = {
1013 .notifier_call = cfg80211_netdev_notifier_call,
1016 static void __net_exit cfg80211_pernet_exit(struct net *net)
1018 struct cfg80211_registered_device *rdev;
1021 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1022 if (net_eq(wiphy_net(&rdev->wiphy), net))
1023 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
1028 static struct pernet_operations cfg80211_pernet_ops = {
1029 .exit = cfg80211_pernet_exit,
1032 static int __init cfg80211_init(void)
1036 err = register_pernet_device(&cfg80211_pernet_ops);
1038 goto out_fail_pernet;
1040 err = wiphy_sysfs_init();
1042 goto out_fail_sysfs;
1044 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
1046 goto out_fail_notifier;
1048 err = nl80211_init();
1050 goto out_fail_nl80211;
1052 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
1054 err = regulatory_init();
1058 cfg80211_wq = create_singlethread_workqueue("cfg80211");
1069 debugfs_remove(ieee80211_debugfs_dir);
1071 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1075 unregister_pernet_device(&cfg80211_pernet_ops);
1079 subsys_initcall(cfg80211_init);
1081 static void __exit cfg80211_exit(void)
1083 debugfs_remove(ieee80211_debugfs_dir);
1085 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1088 unregister_pernet_device(&cfg80211_pernet_ops);
1089 destroy_workqueue(cfg80211_wq);
1091 module_exit(cfg80211_exit);