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_running(wdev))
216 rdev_stop_p2p_device(rdev, wdev);
217 wdev->is_running = 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_stop_nan(struct cfg80211_registered_device *rdev,
229 struct wireless_dev *wdev)
233 if (WARN_ON(wdev->iftype != NL80211_IFTYPE_NAN))
236 if (!wdev_running(wdev))
239 rdev_stop_nan(rdev, wdev);
240 wdev->is_running = false;
245 void cfg80211_shutdown_all_interfaces(struct wiphy *wiphy)
247 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
248 struct wireless_dev *wdev;
252 list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list) {
254 dev_close(wdev->netdev);
257 /* otherwise, check iftype */
258 switch (wdev->iftype) {
259 case NL80211_IFTYPE_P2P_DEVICE:
260 cfg80211_stop_p2p_device(rdev, wdev);
262 case NL80211_IFTYPE_NAN:
263 cfg80211_stop_nan(rdev, wdev);
270 EXPORT_SYMBOL_GPL(cfg80211_shutdown_all_interfaces);
272 static int cfg80211_rfkill_set_block(void *data, bool blocked)
274 struct cfg80211_registered_device *rdev = data;
280 cfg80211_shutdown_all_interfaces(&rdev->wiphy);
286 static void cfg80211_rfkill_sync_work(struct work_struct *work)
288 struct cfg80211_registered_device *rdev;
290 rdev = container_of(work, struct cfg80211_registered_device, rfkill_sync);
291 cfg80211_rfkill_set_block(rdev, rfkill_blocked(rdev->rfkill));
294 static void cfg80211_event_work(struct work_struct *work)
296 struct cfg80211_registered_device *rdev;
298 rdev = container_of(work, struct cfg80211_registered_device,
302 cfg80211_process_rdev_events(rdev);
306 void cfg80211_destroy_ifaces(struct cfg80211_registered_device *rdev)
308 struct cfg80211_iface_destroy *item;
312 spin_lock_irq(&rdev->destroy_list_lock);
313 while ((item = list_first_entry_or_null(&rdev->destroy_list,
314 struct cfg80211_iface_destroy,
316 struct wireless_dev *wdev, *tmp;
317 u32 nlportid = item->nlportid;
319 list_del(&item->list);
321 spin_unlock_irq(&rdev->destroy_list_lock);
323 list_for_each_entry_safe(wdev, tmp,
324 &rdev->wiphy.wdev_list, list) {
325 if (nlportid == wdev->owner_nlportid)
326 rdev_del_virtual_intf(rdev, wdev);
329 spin_lock_irq(&rdev->destroy_list_lock);
331 spin_unlock_irq(&rdev->destroy_list_lock);
334 static void cfg80211_destroy_iface_wk(struct work_struct *work)
336 struct cfg80211_registered_device *rdev;
338 rdev = container_of(work, struct cfg80211_registered_device,
342 cfg80211_destroy_ifaces(rdev);
346 static void cfg80211_sched_scan_stop_wk(struct work_struct *work)
348 struct cfg80211_registered_device *rdev;
350 rdev = container_of(work, struct cfg80211_registered_device,
355 __cfg80211_stop_sched_scan(rdev, false);
360 static void cfg80211_propagate_radar_detect_wk(struct work_struct *work)
362 struct cfg80211_registered_device *rdev;
364 rdev = container_of(work, struct cfg80211_registered_device,
365 propagate_radar_detect_wk);
369 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->radar_chandef,
370 NL80211_DFS_UNAVAILABLE,
371 NL80211_RADAR_DETECTED);
376 static void cfg80211_propagate_cac_done_wk(struct work_struct *work)
378 struct cfg80211_registered_device *rdev;
380 rdev = container_of(work, struct cfg80211_registered_device,
381 propagate_cac_done_wk);
385 regulatory_propagate_dfs_state(&rdev->wiphy, &rdev->cac_done_chandef,
386 NL80211_DFS_AVAILABLE,
387 NL80211_RADAR_CAC_FINISHED);
392 /* exported functions */
394 struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv,
395 const char *requested_name)
397 static atomic_t wiphy_counter = ATOMIC_INIT(0);
399 struct cfg80211_registered_device *rdev;
402 WARN_ON(ops->add_key && (!ops->del_key || !ops->set_default_key));
403 WARN_ON(ops->auth && (!ops->assoc || !ops->deauth || !ops->disassoc));
404 WARN_ON(ops->connect && !ops->disconnect);
405 WARN_ON(ops->join_ibss && !ops->leave_ibss);
406 WARN_ON(ops->add_virtual_intf && !ops->del_virtual_intf);
407 WARN_ON(ops->add_station && !ops->del_station);
408 WARN_ON(ops->add_mpath && !ops->del_mpath);
409 WARN_ON(ops->join_mesh && !ops->leave_mesh);
410 WARN_ON(ops->start_p2p_device && !ops->stop_p2p_device);
411 WARN_ON(ops->start_ap && !ops->stop_ap);
412 WARN_ON(ops->join_ocb && !ops->leave_ocb);
413 WARN_ON(ops->suspend && !ops->resume);
414 WARN_ON(ops->sched_scan_start && !ops->sched_scan_stop);
415 WARN_ON(ops->remain_on_channel && !ops->cancel_remain_on_channel);
416 WARN_ON(ops->tdls_channel_switch && !ops->tdls_cancel_channel_switch);
417 WARN_ON(ops->add_tx_ts && !ops->del_tx_ts);
419 alloc_size = sizeof(*rdev) + sizeof_priv;
421 rdev = kzalloc(alloc_size, GFP_KERNEL);
427 rdev->wiphy_idx = atomic_inc_return(&wiphy_counter);
429 if (unlikely(rdev->wiphy_idx < 0)) {
431 atomic_dec(&wiphy_counter);
436 /* atomic_inc_return makes it start at 1, make it start at 0 */
439 /* give it a proper name */
440 if (requested_name && requested_name[0]) {
444 rv = cfg80211_dev_check_name(rdev, requested_name);
448 goto use_default_name;
451 rv = dev_set_name(&rdev->wiphy.dev, "%s", requested_name);
454 goto use_default_name;
457 /* NOTE: This is *probably* safe w/out holding rtnl because of
458 * the restrictions on phy names. Probably this call could
459 * fail if some other part of the kernel (re)named a device
460 * phyX. But, might should add some locking and check return
461 * value, and use a different name if this one exists?
463 dev_set_name(&rdev->wiphy.dev, PHY_NAME "%d", rdev->wiphy_idx);
466 INIT_LIST_HEAD(&rdev->wiphy.wdev_list);
467 INIT_LIST_HEAD(&rdev->beacon_registrations);
468 spin_lock_init(&rdev->beacon_registrations_lock);
469 spin_lock_init(&rdev->bss_lock);
470 INIT_LIST_HEAD(&rdev->bss_list);
471 INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
472 INIT_WORK(&rdev->sched_scan_results_wk, __cfg80211_sched_scan_results);
473 INIT_LIST_HEAD(&rdev->mlme_unreg);
474 spin_lock_init(&rdev->mlme_unreg_lock);
475 INIT_WORK(&rdev->mlme_unreg_wk, cfg80211_mlme_unreg_wk);
476 INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk,
477 cfg80211_dfs_channels_update_work);
478 #ifdef CONFIG_CFG80211_WEXT
479 rdev->wiphy.wext = &cfg80211_wext_handler;
482 device_initialize(&rdev->wiphy.dev);
483 rdev->wiphy.dev.class = &ieee80211_class;
484 rdev->wiphy.dev.platform_data = rdev;
485 device_enable_async_suspend(&rdev->wiphy.dev);
487 INIT_LIST_HEAD(&rdev->destroy_list);
488 spin_lock_init(&rdev->destroy_list_lock);
489 INIT_WORK(&rdev->destroy_work, cfg80211_destroy_iface_wk);
490 INIT_WORK(&rdev->sched_scan_stop_wk, cfg80211_sched_scan_stop_wk);
491 INIT_WORK(&rdev->propagate_radar_detect_wk,
492 cfg80211_propagate_radar_detect_wk);
493 INIT_WORK(&rdev->propagate_cac_done_wk, cfg80211_propagate_cac_done_wk);
495 #ifdef CONFIG_CFG80211_DEFAULT_PS
496 rdev->wiphy.flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
499 wiphy_net_set(&rdev->wiphy, &init_net);
501 rdev->rfkill_ops.set_block = cfg80211_rfkill_set_block;
502 rdev->rfkill = rfkill_alloc(dev_name(&rdev->wiphy.dev),
503 &rdev->wiphy.dev, RFKILL_TYPE_WLAN,
504 &rdev->rfkill_ops, rdev);
511 INIT_WORK(&rdev->rfkill_sync, cfg80211_rfkill_sync_work);
512 INIT_WORK(&rdev->conn_work, cfg80211_conn_work);
513 INIT_WORK(&rdev->event_work, cfg80211_event_work);
515 init_waitqueue_head(&rdev->dev_wait);
518 * Initialize wiphy parameters to IEEE 802.11 MIB default values.
519 * Fragmentation and RTS threshold are disabled by default with the
522 rdev->wiphy.retry_short = 7;
523 rdev->wiphy.retry_long = 4;
524 rdev->wiphy.frag_threshold = (u32) -1;
525 rdev->wiphy.rts_threshold = (u32) -1;
526 rdev->wiphy.coverage_class = 0;
528 rdev->wiphy.max_num_csa_counters = 1;
530 rdev->wiphy.max_sched_scan_plans = 1;
531 rdev->wiphy.max_sched_scan_plan_interval = U32_MAX;
535 EXPORT_SYMBOL(wiphy_new_nm);
537 static int wiphy_verify_combinations(struct wiphy *wiphy)
539 const struct ieee80211_iface_combination *c;
542 for (i = 0; i < wiphy->n_iface_combinations; i++) {
546 c = &wiphy->iface_combinations[i];
549 * Combinations with just one interface aren't real,
550 * however we make an exception for DFS.
552 if (WARN_ON((c->max_interfaces < 2) && !c->radar_detect_widths))
555 /* Need at least one channel */
556 if (WARN_ON(!c->num_different_channels))
560 * Put a sane limit on maximum number of different
561 * channels to simplify channel accounting code.
563 if (WARN_ON(c->num_different_channels >
564 CFG80211_MAX_NUM_DIFFERENT_CHANNELS))
567 /* DFS only works on one channel. */
568 if (WARN_ON(c->radar_detect_widths &&
569 (c->num_different_channels > 1)))
572 if (WARN_ON(!c->n_limits))
575 for (j = 0; j < c->n_limits; j++) {
576 u16 types = c->limits[j].types;
578 /* interface types shouldn't overlap */
579 if (WARN_ON(types & all_iftypes))
581 all_iftypes |= types;
583 if (WARN_ON(!c->limits[j].max))
586 /* Shouldn't list software iftypes in combinations! */
587 if (WARN_ON(wiphy->software_iftypes & types))
590 /* Only a single P2P_DEVICE can be allowed */
591 if (WARN_ON(types & BIT(NL80211_IFTYPE_P2P_DEVICE) &&
592 c->limits[j].max > 1))
595 /* Only a single NAN can be allowed */
596 if (WARN_ON(types & BIT(NL80211_IFTYPE_NAN) &&
597 c->limits[j].max > 1))
601 * This isn't well-defined right now. If you have an
602 * IBSS interface, then its beacon interval may change
603 * by joining other networks, and nothing prevents it
605 * So technically we probably shouldn't even allow AP
606 * and IBSS in the same interface, but it seems that
607 * some drivers support that, possibly only with fixed
608 * beacon intervals for IBSS.
610 if (WARN_ON(types & BIT(NL80211_IFTYPE_ADHOC) &&
611 c->beacon_int_min_gcd)) {
615 cnt += c->limits[j].max;
617 * Don't advertise an unsupported type
620 if (WARN_ON((wiphy->interface_modes & types) != types))
624 #ifndef CONFIG_WIRELESS_WDS
625 if (WARN_ON(all_iftypes & BIT(NL80211_IFTYPE_WDS)))
629 /* You can't even choose that many! */
630 if (WARN_ON(cnt < c->max_interfaces))
637 int wiphy_register(struct wiphy *wiphy)
639 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
641 enum nl80211_band band;
642 struct ieee80211_supported_band *sband;
643 bool have_band = false;
645 u16 ifmodes = wiphy->interface_modes;
648 if (WARN_ON(wiphy->wowlan &&
649 (wiphy->wowlan->flags & WIPHY_WOWLAN_GTK_REKEY_FAILURE) &&
650 !(wiphy->wowlan->flags & WIPHY_WOWLAN_SUPPORTS_GTK_REKEY)))
652 if (WARN_ON(wiphy->wowlan &&
653 !wiphy->wowlan->flags && !wiphy->wowlan->n_patterns &&
654 !wiphy->wowlan->tcp))
657 if (WARN_ON((wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
658 (!rdev->ops->tdls_channel_switch ||
659 !rdev->ops->tdls_cancel_channel_switch)))
662 if (WARN_ON((wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN)) &&
663 (!rdev->ops->start_nan || !rdev->ops->stop_nan ||
664 !rdev->ops->add_nan_func || !rdev->ops->del_nan_func ||
665 !(wiphy->nan_supported_bands & BIT(NL80211_BAND_2GHZ)))))
668 #ifndef CONFIG_WIRELESS_WDS
669 if (WARN_ON(wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)))
674 * if a wiphy has unsupported modes for regulatory channel enforcement,
675 * opt-out of enforcement checking
677 if (wiphy->interface_modes & ~(BIT(NL80211_IFTYPE_STATION) |
678 BIT(NL80211_IFTYPE_P2P_CLIENT) |
679 BIT(NL80211_IFTYPE_AP) |
680 BIT(NL80211_IFTYPE_P2P_GO) |
681 BIT(NL80211_IFTYPE_ADHOC) |
682 BIT(NL80211_IFTYPE_P2P_DEVICE) |
683 BIT(NL80211_IFTYPE_NAN) |
684 BIT(NL80211_IFTYPE_AP_VLAN) |
685 BIT(NL80211_IFTYPE_MONITOR)))
686 wiphy->regulatory_flags |= REGULATORY_IGNORE_STALE_KICKOFF;
688 if (WARN_ON((wiphy->regulatory_flags & REGULATORY_WIPHY_SELF_MANAGED) &&
689 (wiphy->regulatory_flags &
690 (REGULATORY_CUSTOM_REG |
691 REGULATORY_STRICT_REG |
692 REGULATORY_COUNTRY_IE_FOLLOW_POWER |
693 REGULATORY_COUNTRY_IE_IGNORE))))
696 if (WARN_ON(wiphy->coalesce &&
697 (!wiphy->coalesce->n_rules ||
698 !wiphy->coalesce->n_patterns) &&
699 (!wiphy->coalesce->pattern_min_len ||
700 wiphy->coalesce->pattern_min_len >
701 wiphy->coalesce->pattern_max_len)))
704 if (WARN_ON(wiphy->ap_sme_capa &&
705 !(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME)))
708 if (WARN_ON(wiphy->addresses && !wiphy->n_addresses))
711 if (WARN_ON(wiphy->addresses &&
712 !is_zero_ether_addr(wiphy->perm_addr) &&
713 memcmp(wiphy->perm_addr, wiphy->addresses[0].addr,
717 if (WARN_ON(wiphy->max_acl_mac_addrs &&
718 (!(wiphy->flags & WIPHY_FLAG_HAVE_AP_SME) ||
719 !rdev->ops->set_mac_acl)))
722 /* assure only valid behaviours are flagged by driver
723 * hence subtract 2 as bit 0 is invalid.
725 if (WARN_ON(wiphy->bss_select_support &&
726 (wiphy->bss_select_support & ~(BIT(__NL80211_BSS_SELECT_ATTR_AFTER_LAST) - 2))))
729 if (wiphy->addresses)
730 memcpy(wiphy->perm_addr, wiphy->addresses[0].addr, ETH_ALEN);
732 /* sanity check ifmodes */
734 ifmodes &= ((1 << NUM_NL80211_IFTYPES) - 1) & ~1;
735 if (WARN_ON(ifmodes != wiphy->interface_modes))
736 wiphy->interface_modes = ifmodes;
738 res = wiphy_verify_combinations(wiphy);
742 /* sanity check supported bands/channels */
743 for (band = 0; band < NUM_NL80211_BANDS; band++) {
744 sband = wiphy->bands[band];
749 if (WARN_ON(!sband->n_channels))
752 * on 60GHz band, there are no legacy rates, so
755 if (WARN_ON(band != NL80211_BAND_60GHZ &&
760 * Since cfg80211_disable_40mhz_24ghz is global, we can
761 * modify the sband's ht data even if the driver uses a
762 * global structure for that.
764 if (cfg80211_disable_40mhz_24ghz &&
765 band == NL80211_BAND_2GHZ &&
766 sband->ht_cap.ht_supported) {
767 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
768 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SGI_40;
772 * Since we use a u32 for rate bitmaps in
773 * ieee80211_get_response_rate, we cannot
774 * have more than 32 legacy rates.
776 if (WARN_ON(sband->n_bitrates > 32))
779 for (i = 0; i < sband->n_channels; i++) {
780 sband->channels[i].orig_flags =
781 sband->channels[i].flags;
782 sband->channels[i].orig_mag = INT_MAX;
783 sband->channels[i].orig_mpwr =
784 sband->channels[i].max_power;
785 sband->channels[i].band = band;
797 if (WARN_ON(rdev->wiphy.wowlan && rdev->wiphy.wowlan->n_patterns &&
798 (!rdev->wiphy.wowlan->pattern_min_len ||
799 rdev->wiphy.wowlan->pattern_min_len >
800 rdev->wiphy.wowlan->pattern_max_len)))
804 /* check and set up bitrates */
805 ieee80211_set_bitrate_flags(wiphy);
807 rdev->wiphy.features |= NL80211_FEATURE_SCAN_FLUSH;
810 res = device_add(&rdev->wiphy.dev);
816 /* set up regulatory info */
817 wiphy_regulatory_register(wiphy);
819 list_add_rcu(&rdev->list, &cfg80211_rdev_list);
820 cfg80211_rdev_list_generation++;
823 rdev->wiphy.debugfsdir =
824 debugfs_create_dir(wiphy_name(&rdev->wiphy),
825 ieee80211_debugfs_dir);
826 if (IS_ERR(rdev->wiphy.debugfsdir))
827 rdev->wiphy.debugfsdir = NULL;
829 cfg80211_debugfs_rdev_add(rdev);
830 nl80211_notify_wiphy(rdev, NL80211_CMD_NEW_WIPHY);
832 if (wiphy->regulatory_flags & REGULATORY_CUSTOM_REG) {
833 struct regulatory_request request;
835 request.wiphy_idx = get_wiphy_idx(wiphy);
836 request.initiator = NL80211_REGDOM_SET_BY_DRIVER;
837 request.alpha2[0] = '9';
838 request.alpha2[1] = '9';
840 nl80211_send_reg_change_event(&request);
843 /* Check that nobody globally advertises any capabilities they do not
844 * advertise on all possible interface types.
846 if (wiphy->extended_capabilities_len &&
847 wiphy->num_iftype_ext_capab &&
848 wiphy->iftype_ext_capab) {
849 u8 supported_on_all, j;
850 const struct wiphy_iftype_ext_capab *capab;
852 capab = wiphy->iftype_ext_capab;
853 for (j = 0; j < wiphy->extended_capabilities_len; j++) {
854 if (capab[0].extended_capabilities_len > j)
856 capab[0].extended_capabilities[j];
858 supported_on_all = 0x00;
859 for (i = 1; i < wiphy->num_iftype_ext_capab; i++) {
860 if (j >= capab[i].extended_capabilities_len) {
861 supported_on_all = 0x00;
865 capab[i].extended_capabilities[j];
867 if (WARN_ON(wiphy->extended_capabilities[j] &
873 rdev->wiphy.registered = true;
876 res = rfkill_register(rdev->rfkill);
878 rfkill_destroy(rdev->rfkill);
880 wiphy_unregister(&rdev->wiphy);
886 EXPORT_SYMBOL(wiphy_register);
888 void wiphy_rfkill_start_polling(struct wiphy *wiphy)
890 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
892 if (!rdev->ops->rfkill_poll)
894 rdev->rfkill_ops.poll = cfg80211_rfkill_poll;
895 rfkill_resume_polling(rdev->rfkill);
897 EXPORT_SYMBOL(wiphy_rfkill_start_polling);
899 void wiphy_rfkill_stop_polling(struct wiphy *wiphy)
901 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
903 rfkill_pause_polling(rdev->rfkill);
905 EXPORT_SYMBOL(wiphy_rfkill_stop_polling);
907 void wiphy_unregister(struct wiphy *wiphy)
909 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
911 wait_event(rdev->dev_wait, ({
914 __count = rdev->opencount;
919 rfkill_unregister(rdev->rfkill);
922 nl80211_notify_wiphy(rdev, NL80211_CMD_DEL_WIPHY);
923 rdev->wiphy.registered = false;
925 WARN_ON(!list_empty(&rdev->wiphy.wdev_list));
928 * First remove the hardware from everywhere, this makes
929 * it impossible to find from userspace.
931 debugfs_remove_recursive(rdev->wiphy.debugfsdir);
932 list_del_rcu(&rdev->list);
936 * If this device got a regulatory hint tell core its
937 * free to listen now to a new shiny device regulatory hint
939 wiphy_regulatory_deregister(wiphy);
941 cfg80211_rdev_list_generation++;
942 device_del(&rdev->wiphy.dev);
946 flush_work(&rdev->scan_done_wk);
947 cancel_work_sync(&rdev->conn_work);
948 flush_work(&rdev->event_work);
949 cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
950 flush_work(&rdev->destroy_work);
951 flush_work(&rdev->sched_scan_stop_wk);
952 flush_work(&rdev->mlme_unreg_wk);
953 flush_work(&rdev->propagate_radar_detect_wk);
954 flush_work(&rdev->propagate_cac_done_wk);
957 if (rdev->wiphy.wowlan_config && rdev->ops->set_wakeup)
958 rdev_set_wakeup(rdev, false);
960 cfg80211_rdev_free_wowlan(rdev);
961 cfg80211_rdev_free_coalesce(rdev);
963 EXPORT_SYMBOL(wiphy_unregister);
965 void cfg80211_dev_free(struct cfg80211_registered_device *rdev)
967 struct cfg80211_internal_bss *scan, *tmp;
968 struct cfg80211_beacon_registration *reg, *treg;
969 rfkill_destroy(rdev->rfkill);
970 list_for_each_entry_safe(reg, treg, &rdev->beacon_registrations, list) {
971 list_del(®->list);
974 list_for_each_entry_safe(scan, tmp, &rdev->bss_list, list)
975 cfg80211_put_bss(&rdev->wiphy, &scan->pub);
979 void wiphy_free(struct wiphy *wiphy)
981 put_device(&wiphy->dev);
983 EXPORT_SYMBOL(wiphy_free);
985 void wiphy_rfkill_set_hw_state(struct wiphy *wiphy, bool blocked)
987 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
989 if (rfkill_set_hw_state(rdev->rfkill, blocked))
990 schedule_work(&rdev->rfkill_sync);
992 EXPORT_SYMBOL(wiphy_rfkill_set_hw_state);
994 void cfg80211_cqm_config_free(struct wireless_dev *wdev)
996 kfree(wdev->cqm_config);
997 wdev->cqm_config = NULL;
1000 void cfg80211_unregister_wdev(struct wireless_dev *wdev)
1002 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wdev->wiphy);
1006 if (WARN_ON(wdev->netdev))
1009 nl80211_notify_iface(rdev, wdev, NL80211_CMD_DEL_INTERFACE);
1011 list_del_rcu(&wdev->list);
1012 rdev->devlist_generation++;
1014 switch (wdev->iftype) {
1015 case NL80211_IFTYPE_P2P_DEVICE:
1016 cfg80211_mlme_purge_registrations(wdev);
1017 cfg80211_stop_p2p_device(rdev, wdev);
1019 case NL80211_IFTYPE_NAN:
1020 cfg80211_stop_nan(rdev, wdev);
1027 cfg80211_cqm_config_free(wdev);
1029 EXPORT_SYMBOL(cfg80211_unregister_wdev);
1031 static const struct device_type wiphy_type = {
1035 void cfg80211_update_iface_num(struct cfg80211_registered_device *rdev,
1036 enum nl80211_iftype iftype, int num)
1040 rdev->num_running_ifaces += num;
1041 if (iftype == NL80211_IFTYPE_MONITOR)
1042 rdev->num_running_monitor_ifaces += num;
1045 void __cfg80211_leave(struct cfg80211_registered_device *rdev,
1046 struct wireless_dev *wdev)
1048 struct net_device *dev = wdev->netdev;
1049 struct cfg80211_sched_scan_request *sched_scan_req;
1052 ASSERT_WDEV_LOCK(wdev);
1054 switch (wdev->iftype) {
1055 case NL80211_IFTYPE_ADHOC:
1056 __cfg80211_leave_ibss(rdev, dev, true);
1058 case NL80211_IFTYPE_P2P_CLIENT:
1059 case NL80211_IFTYPE_STATION:
1060 sched_scan_req = rtnl_dereference(rdev->sched_scan_req);
1061 if (sched_scan_req && dev == sched_scan_req->dev)
1062 __cfg80211_stop_sched_scan(rdev, false);
1064 #ifdef CONFIG_CFG80211_WEXT
1065 kfree(wdev->wext.ie);
1066 wdev->wext.ie = NULL;
1067 wdev->wext.ie_len = 0;
1068 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1070 cfg80211_disconnect(rdev, dev,
1071 WLAN_REASON_DEAUTH_LEAVING, true);
1073 case NL80211_IFTYPE_MESH_POINT:
1074 __cfg80211_leave_mesh(rdev, dev);
1076 case NL80211_IFTYPE_AP:
1077 case NL80211_IFTYPE_P2P_GO:
1078 __cfg80211_stop_ap(rdev, dev, true);
1080 case NL80211_IFTYPE_OCB:
1081 __cfg80211_leave_ocb(rdev, dev);
1083 case NL80211_IFTYPE_WDS:
1084 /* must be handled by mac80211/driver, has no APIs */
1086 case NL80211_IFTYPE_P2P_DEVICE:
1087 case NL80211_IFTYPE_NAN:
1088 /* cannot happen, has no netdev */
1090 case NL80211_IFTYPE_AP_VLAN:
1091 case NL80211_IFTYPE_MONITOR:
1094 case NL80211_IFTYPE_UNSPECIFIED:
1095 case NUM_NL80211_IFTYPES:
1101 void cfg80211_leave(struct cfg80211_registered_device *rdev,
1102 struct wireless_dev *wdev)
1105 __cfg80211_leave(rdev, wdev);
1109 void cfg80211_stop_iface(struct wiphy *wiphy, struct wireless_dev *wdev,
1112 struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
1113 struct cfg80211_event *ev;
1114 unsigned long flags;
1116 trace_cfg80211_stop_iface(wiphy, wdev);
1118 ev = kzalloc(sizeof(*ev), gfp);
1122 ev->type = EVENT_STOPPED;
1124 spin_lock_irqsave(&wdev->event_lock, flags);
1125 list_add_tail(&ev->list, &wdev->event_list);
1126 spin_unlock_irqrestore(&wdev->event_lock, flags);
1127 queue_work(cfg80211_wq, &rdev->event_work);
1129 EXPORT_SYMBOL(cfg80211_stop_iface);
1131 static int cfg80211_netdev_notifier_call(struct notifier_block *nb,
1132 unsigned long state, void *ptr)
1134 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1135 struct wireless_dev *wdev = dev->ieee80211_ptr;
1136 struct cfg80211_registered_device *rdev;
1137 struct cfg80211_sched_scan_request *sched_scan_req;
1142 rdev = wiphy_to_rdev(wdev->wiphy);
1144 WARN_ON(wdev->iftype == NL80211_IFTYPE_UNSPECIFIED);
1147 case NETDEV_POST_INIT:
1148 SET_NETDEV_DEVTYPE(dev, &wiphy_type);
1150 case NETDEV_REGISTER:
1152 * NB: cannot take rdev->mtx here because this may be
1153 * called within code protected by it when interfaces
1154 * are added with nl80211.
1156 mutex_init(&wdev->mtx);
1157 INIT_LIST_HEAD(&wdev->event_list);
1158 spin_lock_init(&wdev->event_lock);
1159 INIT_LIST_HEAD(&wdev->mgmt_registrations);
1160 spin_lock_init(&wdev->mgmt_registrations_lock);
1162 wdev->identifier = ++rdev->wdev_id;
1163 list_add_rcu(&wdev->list, &rdev->wiphy.wdev_list);
1164 rdev->devlist_generation++;
1165 /* can only change netns with wiphy */
1166 dev->features |= NETIF_F_NETNS_LOCAL;
1168 if (sysfs_create_link(&dev->dev.kobj, &rdev->wiphy.dev.kobj,
1170 pr_err("failed to add phy80211 symlink to netdev!\n");
1173 #ifdef CONFIG_CFG80211_WEXT
1174 wdev->wext.default_key = -1;
1175 wdev->wext.default_mgmt_key = -1;
1176 wdev->wext.connect.auth_type = NL80211_AUTHTYPE_AUTOMATIC;
1179 if (wdev->wiphy->flags & WIPHY_FLAG_PS_ON_BY_DEFAULT)
1183 /* allow mac80211 to determine the timeout */
1184 wdev->ps_timeout = -1;
1186 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1187 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT ||
1188 wdev->iftype == NL80211_IFTYPE_ADHOC) && !wdev->use_4addr)
1189 dev->priv_flags |= IFF_DONT_BRIDGE;
1191 INIT_WORK(&wdev->disconnect_wk, cfg80211_autodisconnect_wk);
1193 nl80211_notify_iface(rdev, wdev, NL80211_CMD_NEW_INTERFACE);
1195 case NETDEV_GOING_DOWN:
1196 cfg80211_leave(rdev, wdev);
1199 cfg80211_update_iface_num(rdev, wdev->iftype, -1);
1200 if (rdev->scan_req && rdev->scan_req->wdev == wdev) {
1201 if (WARN_ON(!rdev->scan_req->notified))
1202 rdev->scan_req->info.aborted = true;
1203 ___cfg80211_scan_done(rdev, false);
1206 sched_scan_req = rtnl_dereference(rdev->sched_scan_req);
1207 if (WARN_ON(sched_scan_req &&
1208 sched_scan_req->dev == wdev->netdev)) {
1209 __cfg80211_stop_sched_scan(rdev, false);
1213 wake_up(&rdev->dev_wait);
1216 cfg80211_update_iface_num(rdev, wdev->iftype, 1);
1218 switch (wdev->iftype) {
1219 #ifdef CONFIG_CFG80211_WEXT
1220 case NL80211_IFTYPE_ADHOC:
1221 cfg80211_ibss_wext_join(rdev, wdev);
1223 case NL80211_IFTYPE_STATION:
1224 cfg80211_mgd_wext_connect(rdev, wdev);
1227 #ifdef CONFIG_MAC80211_MESH
1228 case NL80211_IFTYPE_MESH_POINT:
1230 /* backward compat code... */
1231 struct mesh_setup setup;
1232 memcpy(&setup, &default_mesh_setup,
1234 /* back compat only needed for mesh_id */
1235 setup.mesh_id = wdev->ssid;
1236 setup.mesh_id_len = wdev->mesh_id_up_len;
1237 if (wdev->mesh_id_up_len)
1238 __cfg80211_join_mesh(rdev, dev,
1240 &default_mesh_config);
1251 * Configure power management to the driver here so that its
1252 * correctly set also after interface type changes etc.
1254 if ((wdev->iftype == NL80211_IFTYPE_STATION ||
1255 wdev->iftype == NL80211_IFTYPE_P2P_CLIENT) &&
1256 rdev->ops->set_power_mgmt &&
1257 rdev_set_power_mgmt(rdev, dev, wdev->ps,
1258 wdev->ps_timeout)) {
1259 /* assume this means it's off */
1263 case NETDEV_UNREGISTER:
1265 * It is possible to get NETDEV_UNREGISTER
1266 * multiple times. To detect that, check
1267 * that the interface is still on the list
1268 * of registered interfaces, and only then
1269 * remove and clean it up.
1271 if (!list_empty(&wdev->list)) {
1272 nl80211_notify_iface(rdev, wdev,
1273 NL80211_CMD_DEL_INTERFACE);
1274 sysfs_remove_link(&dev->dev.kobj, "phy80211");
1275 list_del_rcu(&wdev->list);
1276 rdev->devlist_generation++;
1277 cfg80211_mlme_purge_registrations(wdev);
1278 #ifdef CONFIG_CFG80211_WEXT
1279 kzfree(wdev->wext.keys);
1281 flush_work(&wdev->disconnect_wk);
1282 cfg80211_cqm_config_free(wdev);
1285 * synchronise (so that we won't find this netdev
1286 * from other code any more) and then clear the list
1287 * head so that the above code can safely check for
1288 * !list_empty() to avoid double-cleanup.
1291 INIT_LIST_HEAD(&wdev->list);
1293 * Ensure that all events have been processed and
1296 cfg80211_process_wdev_events(wdev);
1298 if (WARN_ON(wdev->current_bss)) {
1299 cfg80211_unhold_bss(wdev->current_bss);
1300 cfg80211_put_bss(wdev->wiphy, &wdev->current_bss->pub);
1301 wdev->current_bss = NULL;
1305 if (!(wdev->wiphy->interface_modes & BIT(wdev->iftype)))
1306 return notifier_from_errno(-EOPNOTSUPP);
1307 if (rfkill_blocked(rdev->rfkill))
1308 return notifier_from_errno(-ERFKILL);
1314 wireless_nlevent_flush();
1319 static struct notifier_block cfg80211_netdev_notifier = {
1320 .notifier_call = cfg80211_netdev_notifier_call,
1323 static void __net_exit cfg80211_pernet_exit(struct net *net)
1325 struct cfg80211_registered_device *rdev;
1328 list_for_each_entry(rdev, &cfg80211_rdev_list, list) {
1329 if (net_eq(wiphy_net(&rdev->wiphy), net))
1330 WARN_ON(cfg80211_switch_netns(rdev, &init_net));
1335 static struct pernet_operations cfg80211_pernet_ops = {
1336 .exit = cfg80211_pernet_exit,
1339 static int __init cfg80211_init(void)
1343 err = register_pernet_device(&cfg80211_pernet_ops);
1345 goto out_fail_pernet;
1347 err = wiphy_sysfs_init();
1349 goto out_fail_sysfs;
1351 err = register_netdevice_notifier(&cfg80211_netdev_notifier);
1353 goto out_fail_notifier;
1355 err = nl80211_init();
1357 goto out_fail_nl80211;
1359 ieee80211_debugfs_dir = debugfs_create_dir("ieee80211", NULL);
1361 err = regulatory_init();
1365 cfg80211_wq = alloc_ordered_workqueue("cfg80211", WQ_MEM_RECLAIM);
1376 debugfs_remove(ieee80211_debugfs_dir);
1379 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1383 unregister_pernet_device(&cfg80211_pernet_ops);
1387 subsys_initcall(cfg80211_init);
1389 static void __exit cfg80211_exit(void)
1391 debugfs_remove(ieee80211_debugfs_dir);
1393 unregister_netdevice_notifier(&cfg80211_netdev_notifier);
1396 unregister_pernet_device(&cfg80211_pernet_ops);
1397 destroy_workqueue(cfg80211_wq);
1399 module_exit(cfg80211_exit);