1 // SPDX-License-Identifier: GPL-2.0-only
5 * Copyright 2002-2005, Instant802 Networks, Inc.
6 * Copyright 2005-2006, Devicescape Software, Inc.
7 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
8 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
9 * Copyright 2013-2014 Intel Mobile Communications GmbH
10 * Copyright (c) 2016 Intel Deutschland GmbH
11 * Copyright (C) 2018-2023 Intel Corporation
13 #include <linux/slab.h>
14 #include <linux/kernel.h>
15 #include <linux/if_arp.h>
16 #include <linux/netdevice.h>
17 #include <linux/rtnetlink.h>
18 #include <linux/kcov.h>
19 #include <net/mac80211.h>
20 #include <net/ieee80211_radiotap.h>
21 #include "ieee80211_i.h"
23 #include "debugfs_netdev.h"
26 #include "driver-ops.h"
31 * DOC: Interface list locking
33 * The interface list in each struct ieee80211_local is protected
36 * (1) modifications may only be done under the RTNL *and* wiphy mutex
38 * (2) modifications are done in an RCU manner so atomic readers
39 * can traverse the list in RCU-safe blocks.
41 * As a consequence, reads (traversals) of the list can be protected
42 * by either the RTNL, the wiphy mutex, the iflist_mtx or RCU.
45 static void ieee80211_iface_work(struct wiphy *wiphy, struct wiphy_work *work);
47 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
49 struct ieee80211_chanctx_conf *chanctx_conf;
53 chanctx_conf = rcu_dereference(sdata->vif.bss_conf.chanctx_conf);
59 power = ieee80211_chandef_max_power(&chanctx_conf->def);
62 if (sdata->deflink.user_power_level != IEEE80211_UNSET_POWER_LEVEL)
63 power = min(power, sdata->deflink.user_power_level);
65 if (sdata->deflink.ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
66 power = min(power, sdata->deflink.ap_power_level);
68 if (power != sdata->vif.bss_conf.txpower) {
69 sdata->vif.bss_conf.txpower = power;
70 ieee80211_hw_config(sdata->local, 0);
77 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
80 if (__ieee80211_recalc_txpower(sdata) ||
81 (update_bss && ieee80211_sdata_running(sdata)))
82 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
86 static u32 __ieee80211_idle_off(struct ieee80211_local *local)
88 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
91 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
92 return IEEE80211_CONF_CHANGE_IDLE;
95 static u32 __ieee80211_idle_on(struct ieee80211_local *local)
97 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
100 ieee80211_flush_queues(local, NULL, false);
102 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
103 return IEEE80211_CONF_CHANGE_IDLE;
106 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
109 bool working, scanning, active;
110 unsigned int led_trig_start = 0, led_trig_stop = 0;
112 lockdep_assert_wiphy(local->hw.wiphy);
114 active = force_active ||
115 !list_empty(&local->chanctx_list) ||
118 working = !local->ops->remain_on_channel &&
119 !list_empty(&local->roc_list);
121 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
122 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
124 if (working || scanning)
125 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
127 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
130 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
132 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
134 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
136 if (working || scanning || active)
137 return __ieee80211_idle_off(local);
138 return __ieee80211_idle_on(local);
141 u32 ieee80211_idle_off(struct ieee80211_local *local)
143 return __ieee80211_recalc_idle(local, true);
146 void ieee80211_recalc_idle(struct ieee80211_local *local)
148 u32 change = __ieee80211_recalc_idle(local, false);
150 ieee80211_hw_config(local, change);
153 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
156 struct ieee80211_local *local = sdata->local;
157 struct ieee80211_sub_if_data *iter;
162 lockdep_assert_wiphy(local->hw.wiphy);
164 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
168 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
169 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
170 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
172 m = local->hw.wiphy->addr_mask;
173 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
174 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
175 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
180 list_for_each_entry(iter, &local->interfaces, list) {
184 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
185 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE))
189 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
190 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
191 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
193 if ((new & ~mask) != (tmp & ~mask)) {
202 static int ieee80211_can_powered_addr_change(struct ieee80211_sub_if_data *sdata)
204 struct ieee80211_roc_work *roc;
205 struct ieee80211_local *local = sdata->local;
206 struct ieee80211_sub_if_data *scan_sdata;
209 lockdep_assert_wiphy(local->hw.wiphy);
211 /* To be the most flexible here we want to only limit changing the
212 * address if the specific interface is doing offchannel work or
215 if (netif_carrier_ok(sdata->dev))
218 /* First check no ROC work is happening on this iface */
219 list_for_each_entry(roc, &local->roc_list, list) {
220 if (roc->sdata != sdata)
229 /* And if this iface is scanning */
230 if (local->scanning) {
231 scan_sdata = rcu_dereference_protected(local->scan_sdata,
232 lockdep_is_held(&local->hw.wiphy->mtx));
233 if (sdata == scan_sdata)
237 switch (sdata->vif.type) {
238 case NL80211_IFTYPE_STATION:
239 case NL80211_IFTYPE_P2P_CLIENT:
240 /* More interface types could be added here but changing the
241 * address while powered makes the most sense in client modes.
252 static int _ieee80211_change_mac(struct ieee80211_sub_if_data *sdata,
255 struct ieee80211_local *local = sdata->local;
256 struct sockaddr *sa = addr;
257 bool check_dup = true;
261 if (ieee80211_sdata_running(sdata)) {
262 ret = ieee80211_can_powered_addr_change(sdata);
269 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
270 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
273 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
278 drv_remove_interface(local, sdata);
279 ret = eth_mac_addr(sdata->dev, sa);
282 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
283 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
286 /* Regardless of eth_mac_addr() return we still want to add the
287 * interface back. This should not fail...
290 WARN_ON(drv_add_interface(local, sdata));
295 static int ieee80211_change_mac(struct net_device *dev, void *addr)
297 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
298 struct ieee80211_local *local = sdata->local;
302 * This happens during unregistration if there's a bond device
303 * active (maybe other cases?) and we must get removed from it.
304 * But we really don't care anymore if it's not registered now.
306 if (!dev->ieee80211_ptr->registered)
309 wiphy_lock(local->hw.wiphy);
310 ret = _ieee80211_change_mac(sdata, addr);
311 wiphy_unlock(local->hw.wiphy);
316 static inline int identical_mac_addr_allowed(int type1, int type2)
318 return type1 == NL80211_IFTYPE_MONITOR ||
319 type2 == NL80211_IFTYPE_MONITOR ||
320 type1 == NL80211_IFTYPE_P2P_DEVICE ||
321 type2 == NL80211_IFTYPE_P2P_DEVICE ||
322 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
323 (type1 == NL80211_IFTYPE_AP_VLAN &&
324 (type2 == NL80211_IFTYPE_AP ||
325 type2 == NL80211_IFTYPE_AP_VLAN));
328 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
329 enum nl80211_iftype iftype)
331 struct ieee80211_local *local = sdata->local;
332 struct ieee80211_sub_if_data *nsdata;
335 lockdep_assert_wiphy(local->hw.wiphy);
337 /* we hold the RTNL here so can safely walk the list */
338 list_for_each_entry(nsdata, &local->interfaces, list) {
339 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
341 * Only OCB and monitor mode may coexist
343 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
344 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
345 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
346 nsdata->vif.type == NL80211_IFTYPE_OCB))
350 * Allow only a single IBSS interface to be up at any
351 * time. This is restricted because beacon distribution
352 * cannot work properly if both are in the same IBSS.
354 * To remove this restriction we'd have to disallow them
355 * from setting the same SSID on different IBSS interfaces
356 * belonging to the same hardware. Then, however, we're
357 * faced with having to adopt two different TSF timers...
359 if (iftype == NL80211_IFTYPE_ADHOC &&
360 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
363 * will not add another interface while any channel
366 if (nsdata->vif.bss_conf.csa_active)
370 * The remaining checks are only performed for interfaces
371 * with the same MAC address.
373 if (!ether_addr_equal(sdata->vif.addr,
378 * check whether it may have the same address
380 if (!identical_mac_addr_allowed(iftype,
384 /* No support for VLAN with MLO yet */
385 if (iftype == NL80211_IFTYPE_AP_VLAN &&
386 sdata->wdev.use_4addr &&
387 nsdata->vif.type == NL80211_IFTYPE_AP &&
388 nsdata->vif.valid_links)
392 * can only add VLANs to enabled APs
394 if (iftype == NL80211_IFTYPE_AP_VLAN &&
395 nsdata->vif.type == NL80211_IFTYPE_AP)
396 sdata->bss = &nsdata->u.ap;
400 return ieee80211_check_combinations(sdata, NULL, 0, 0);
403 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
404 enum nl80211_iftype iftype)
406 int n_queues = sdata->local->hw.queues;
409 if (iftype == NL80211_IFTYPE_NAN)
412 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
413 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
414 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
415 IEEE80211_INVAL_HW_QUEUE))
417 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
423 if ((iftype != NL80211_IFTYPE_AP &&
424 iftype != NL80211_IFTYPE_P2P_GO &&
425 iftype != NL80211_IFTYPE_MESH_POINT) ||
426 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
427 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
431 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
434 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
440 static int ieee80211_open(struct net_device *dev)
442 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
445 /* fail early if user set an invalid address */
446 if (!is_valid_ether_addr(dev->dev_addr))
447 return -EADDRNOTAVAIL;
449 wiphy_lock(sdata->local->hw.wiphy);
450 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
454 err = ieee80211_do_open(&sdata->wdev, true);
456 wiphy_unlock(sdata->local->hw.wiphy);
461 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, bool going_down)
463 struct ieee80211_local *local = sdata->local;
465 struct sk_buff *skb, *tmp;
466 u32 hw_reconf_flags = 0;
469 struct cfg80211_chan_def chandef;
471 struct cfg80211_nan_func *func;
473 lockdep_assert_wiphy(local->hw.wiphy);
475 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
476 synchronize_rcu(); /* flush _ieee80211_wake_txqs() */
478 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
480 ieee80211_scan_cancel(local);
482 ieee80211_roc_purge(local, sdata);
484 switch (sdata->vif.type) {
485 case NL80211_IFTYPE_STATION:
486 ieee80211_mgd_stop(sdata);
488 case NL80211_IFTYPE_ADHOC:
489 ieee80211_ibss_stop(sdata);
491 case NL80211_IFTYPE_MONITOR:
492 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
494 list_del_rcu(&sdata->u.mntr.list);
501 * Remove all stations associated with this interface.
503 * This must be done before calling ops->remove_interface()
504 * because otherwise we can later invoke ops->sta_notify()
505 * whenever the STAs are removed, and that invalidates driver
506 * assumptions about always getting a vif pointer that is valid
507 * (because if we remove a STA after ops->remove_interface()
508 * the driver will have removed the vif info already!)
510 * For AP_VLANs stations may exist since there's nothing else that
511 * would have removed them, but in other modes there shouldn't
514 flushed = sta_info_flush(sdata);
515 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && flushed > 0);
517 /* don't count this interface for allmulti while it is down */
518 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
519 atomic_dec(&local->iff_allmultis);
521 if (sdata->vif.type == NL80211_IFTYPE_AP) {
523 local->fif_probe_req--;
524 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
525 local->fif_probe_req--;
529 netif_addr_lock_bh(sdata->dev);
530 spin_lock_bh(&local->filter_lock);
531 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
532 sdata->dev->addr_len);
533 spin_unlock_bh(&local->filter_lock);
534 netif_addr_unlock_bh(sdata->dev);
537 del_timer_sync(&local->dynamic_ps_timer);
538 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work);
540 WARN(ieee80211_vif_is_mld(&sdata->vif),
541 "destroying interface with valid links 0x%04x\n",
542 sdata->vif.valid_links);
544 sdata->vif.bss_conf.csa_active = false;
545 if (sdata->vif.type == NL80211_IFTYPE_STATION)
546 sdata->deflink.u.mgd.csa_waiting_bcn = false;
547 if (sdata->deflink.csa_block_tx) {
548 ieee80211_wake_vif_queues(local, sdata,
549 IEEE80211_QUEUE_STOP_REASON_CSA);
550 sdata->deflink.csa_block_tx = false;
553 wiphy_work_cancel(local->hw.wiphy, &sdata->deflink.csa_finalize_work);
554 wiphy_work_cancel(local->hw.wiphy,
555 &sdata->deflink.color_change_finalize_work);
556 wiphy_delayed_work_cancel(local->hw.wiphy,
557 &sdata->deflink.dfs_cac_timer_work);
559 if (sdata->wdev.cac_started) {
560 chandef = sdata->vif.bss_conf.chandef;
561 WARN_ON(local->suspended);
562 ieee80211_link_release_channel(&sdata->deflink);
563 cfg80211_cac_event(sdata->dev, &chandef,
564 NL80211_RADAR_CAC_ABORTED,
568 if (sdata->vif.type == NL80211_IFTYPE_AP) {
569 WARN_ON(!list_empty(&sdata->u.ap.vlans));
570 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
571 /* remove all packets in parent bc_buf pointing to this dev */
572 ps = &sdata->bss->ps;
574 spin_lock_irqsave(&ps->bc_buf.lock, flags);
575 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
576 if (skb->dev == sdata->dev) {
577 __skb_unlink(skb, &ps->bc_buf);
578 local->total_ps_buffered--;
579 ieee80211_free_txskb(&local->hw, skb);
582 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
588 switch (sdata->vif.type) {
589 case NL80211_IFTYPE_AP_VLAN:
590 list_del(&sdata->u.vlan.list);
591 RCU_INIT_POINTER(sdata->vif.bss_conf.chanctx_conf, NULL);
592 /* see comment in the default case below */
593 ieee80211_free_keys(sdata, true);
594 /* no need to tell driver */
596 case NL80211_IFTYPE_MONITOR:
597 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
598 local->cooked_mntrs--;
603 if (local->monitors == 0) {
604 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
605 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
608 ieee80211_adjust_monitor_flags(sdata, -1);
610 case NL80211_IFTYPE_NAN:
611 /* clean all the functions */
612 spin_lock_bh(&sdata->u.nan.func_lock);
614 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
615 idr_remove(&sdata->u.nan.function_inst_ids, i);
616 cfg80211_free_nan_func(func);
618 idr_destroy(&sdata->u.nan.function_inst_ids);
620 spin_unlock_bh(&sdata->u.nan.func_lock);
622 case NL80211_IFTYPE_P2P_DEVICE:
623 /* relies on synchronize_rcu() below */
624 RCU_INIT_POINTER(local->p2p_sdata, NULL);
627 wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->work);
629 * When we get here, the interface is marked down.
630 * Free the remaining keys, if there are any
631 * (which can happen in AP mode if userspace sets
632 * keys before the interface is operating)
634 * Force the key freeing to always synchronize_net()
635 * to wait for the RX path in case it is using this
636 * interface enqueuing frames at this very time on
639 ieee80211_free_keys(sdata, true);
640 skb_queue_purge(&sdata->skb_queue);
641 skb_queue_purge(&sdata->status_queue);
644 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
645 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
646 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
647 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
648 if (info->control.vif == &sdata->vif) {
649 __skb_unlink(skb, &local->pending[i]);
650 ieee80211_free_txskb(&local->hw, skb);
654 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
656 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
657 ieee80211_txq_remove_vlan(local, sdata);
661 if (local->open_count == 0)
662 ieee80211_clear_tx_pending(local);
664 sdata->vif.bss_conf.beacon_int = 0;
667 * If the interface goes down while suspended, presumably because
668 * the device was unplugged and that happens before our resume,
669 * then the driver is already unconfigured and the remainder of
670 * this function isn't needed.
671 * XXX: what about WoWLAN? If the device has software state, e.g.
672 * memory allocated, it might expect teardown commands from
675 if (local->suspended) {
676 WARN_ON(local->wowlan);
677 WARN_ON(rcu_access_pointer(local->monitor_sdata));
681 switch (sdata->vif.type) {
682 case NL80211_IFTYPE_AP_VLAN:
684 case NL80211_IFTYPE_MONITOR:
685 if (local->monitors == 0)
686 ieee80211_del_virtual_monitor(local);
688 ieee80211_recalc_idle(local);
690 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
696 drv_remove_interface(local, sdata);
699 ieee80211_recalc_ps(local);
702 wiphy_delayed_work_flush(local->hw.wiphy, &local->scan_work);
704 if (local->open_count == 0) {
705 ieee80211_stop_device(local);
707 /* no reconfiguring after stop! */
711 /* do after stop to avoid reconfiguring when we stop anyway */
712 ieee80211_configure_filter(local);
713 ieee80211_hw_config(local, hw_reconf_flags);
715 if (local->monitors == local->open_count)
716 ieee80211_add_virtual_monitor(local);
719 static void ieee80211_stop_mbssid(struct ieee80211_sub_if_data *sdata)
721 struct ieee80211_sub_if_data *tx_sdata, *non_tx_sdata, *tmp_sdata;
722 struct ieee80211_vif *tx_vif = sdata->vif.mbssid_tx_vif;
727 tx_sdata = vif_to_sdata(tx_vif);
728 sdata->vif.mbssid_tx_vif = NULL;
730 list_for_each_entry_safe(non_tx_sdata, tmp_sdata,
731 &tx_sdata->local->interfaces, list) {
732 if (non_tx_sdata != sdata && non_tx_sdata != tx_sdata &&
733 non_tx_sdata->vif.mbssid_tx_vif == tx_vif &&
734 ieee80211_sdata_running(non_tx_sdata)) {
735 non_tx_sdata->vif.mbssid_tx_vif = NULL;
736 dev_close(non_tx_sdata->wdev.netdev);
740 if (sdata != tx_sdata && ieee80211_sdata_running(tx_sdata)) {
741 tx_sdata->vif.mbssid_tx_vif = NULL;
742 dev_close(tx_sdata->wdev.netdev);
746 static int ieee80211_stop(struct net_device *dev)
748 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
750 /* close dependent VLAN and MBSSID interfaces before locking wiphy */
751 if (sdata->vif.type == NL80211_IFTYPE_AP) {
752 struct ieee80211_sub_if_data *vlan, *tmpsdata;
754 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
756 dev_close(vlan->dev);
758 ieee80211_stop_mbssid(sdata);
761 wiphy_lock(sdata->local->hw.wiphy);
762 wiphy_work_cancel(sdata->local->hw.wiphy, &sdata->activate_links_work);
764 ieee80211_do_stop(sdata, true);
765 wiphy_unlock(sdata->local->hw.wiphy);
770 static void ieee80211_set_multicast_list(struct net_device *dev)
772 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
773 struct ieee80211_local *local = sdata->local;
774 int allmulti, sdata_allmulti;
776 allmulti = !!(dev->flags & IFF_ALLMULTI);
777 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
779 if (allmulti != sdata_allmulti) {
780 if (dev->flags & IFF_ALLMULTI)
781 atomic_inc(&local->iff_allmultis);
783 atomic_dec(&local->iff_allmultis);
784 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
787 spin_lock_bh(&local->filter_lock);
788 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
789 spin_unlock_bh(&local->filter_lock);
790 wiphy_work_queue(local->hw.wiphy, &local->reconfig_filter);
794 * Called when the netdev is removed or, by the code below, before
795 * the interface type changes.
797 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
799 /* free extra data */
800 ieee80211_free_keys(sdata, false);
802 ieee80211_debugfs_remove_netdev(sdata);
804 ieee80211_destroy_frag_cache(&sdata->frags);
806 if (ieee80211_vif_is_mesh(&sdata->vif))
807 ieee80211_mesh_teardown_sdata(sdata);
809 ieee80211_vif_clear_links(sdata);
810 ieee80211_link_stop(&sdata->deflink);
813 static void ieee80211_uninit(struct net_device *dev)
815 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
819 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
821 dev_fetch_sw_netstats(stats, dev->tstats);
824 static int ieee80211_netdev_setup_tc(struct net_device *dev,
825 enum tc_setup_type type, void *type_data)
827 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
828 struct ieee80211_local *local = sdata->local;
830 return drv_net_setup_tc(local, sdata, dev, type, type_data);
833 static const struct net_device_ops ieee80211_dataif_ops = {
834 .ndo_open = ieee80211_open,
835 .ndo_stop = ieee80211_stop,
836 .ndo_uninit = ieee80211_uninit,
837 .ndo_start_xmit = ieee80211_subif_start_xmit,
838 .ndo_set_rx_mode = ieee80211_set_multicast_list,
839 .ndo_set_mac_address = ieee80211_change_mac,
840 .ndo_get_stats64 = ieee80211_get_stats64,
841 .ndo_setup_tc = ieee80211_netdev_setup_tc,
844 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
846 struct net_device *sb_dev)
848 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
849 struct ieee80211_local *local = sdata->local;
850 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
851 struct ieee80211_hdr *hdr;
854 if (local->hw.queues < IEEE80211_NUM_ACS)
857 /* reset flags and info before parsing radiotap header */
858 memset(info, 0, sizeof(*info));
860 if (!ieee80211_parse_tx_radiotap(skb, dev))
861 return 0; /* doesn't matter, frame will be dropped */
863 len_rthdr = ieee80211_get_radiotap_len(skb->data);
864 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
865 if (skb->len < len_rthdr + 2 ||
866 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control))
867 return 0; /* doesn't matter, frame will be dropped */
869 return ieee80211_select_queue_80211(sdata, skb, hdr);
872 static const struct net_device_ops ieee80211_monitorif_ops = {
873 .ndo_open = ieee80211_open,
874 .ndo_stop = ieee80211_stop,
875 .ndo_uninit = ieee80211_uninit,
876 .ndo_start_xmit = ieee80211_monitor_start_xmit,
877 .ndo_set_rx_mode = ieee80211_set_multicast_list,
878 .ndo_set_mac_address = ieee80211_change_mac,
879 .ndo_select_queue = ieee80211_monitor_select_queue,
880 .ndo_get_stats64 = ieee80211_get_stats64,
883 static int ieee80211_netdev_fill_forward_path(struct net_device_path_ctx *ctx,
884 struct net_device_path *path)
886 struct ieee80211_sub_if_data *sdata;
887 struct ieee80211_local *local;
888 struct sta_info *sta;
891 sdata = IEEE80211_DEV_TO_SUB_IF(ctx->dev);
892 local = sdata->local;
894 if (!local->ops->net_fill_forward_path)
898 switch (sdata->vif.type) {
899 case NL80211_IFTYPE_AP_VLAN:
900 sta = rcu_dereference(sdata->u.vlan.sta);
903 if (sdata->wdev.use_4addr)
905 if (is_multicast_ether_addr(ctx->daddr))
907 sta = sta_info_get_bss(sdata, ctx->daddr);
909 case NL80211_IFTYPE_AP:
910 if (is_multicast_ether_addr(ctx->daddr))
912 sta = sta_info_get(sdata, ctx->daddr);
914 case NL80211_IFTYPE_STATION:
915 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
916 sta = sta_info_get(sdata, ctx->daddr);
917 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
918 if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
925 sta = sta_info_get(sdata, sdata->deflink.u.mgd.bssid);
934 ret = drv_net_fill_forward_path(local, sdata, &sta->sta, ctx, path);
941 static const struct net_device_ops ieee80211_dataif_8023_ops = {
942 .ndo_open = ieee80211_open,
943 .ndo_stop = ieee80211_stop,
944 .ndo_uninit = ieee80211_uninit,
945 .ndo_start_xmit = ieee80211_subif_start_xmit_8023,
946 .ndo_set_rx_mode = ieee80211_set_multicast_list,
947 .ndo_set_mac_address = ieee80211_change_mac,
948 .ndo_get_stats64 = ieee80211_get_stats64,
949 .ndo_fill_forward_path = ieee80211_netdev_fill_forward_path,
950 .ndo_setup_tc = ieee80211_netdev_setup_tc,
953 static bool ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype)
956 /* P2P GO and client are mapped to AP/STATION types */
957 case NL80211_IFTYPE_AP:
958 case NL80211_IFTYPE_STATION:
965 static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata)
967 struct ieee80211_local *local = sdata->local;
970 flags = sdata->vif.offload_flags;
972 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) &&
973 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
974 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED;
976 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) &&
977 local->hw.wiphy->frag_threshold != (u32)-1)
978 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
981 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
983 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
986 if (ieee80211_hw_check(&local->hw, SUPPORTS_RX_DECAP_OFFLOAD) &&
987 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
988 flags |= IEEE80211_OFFLOAD_DECAP_ENABLED;
990 if (local->monitors &&
991 !ieee80211_hw_check(&local->hw, SUPPORTS_CONC_MON_RX_DECAP))
992 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
994 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
997 if (sdata->vif.offload_flags == flags)
1000 sdata->vif.offload_flags = flags;
1001 ieee80211_check_fast_rx_iface(sdata);
1005 static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata)
1007 struct ieee80211_local *local = sdata->local;
1008 struct ieee80211_sub_if_data *bss = sdata;
1011 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1015 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
1018 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) ||
1019 !ieee80211_iftype_supports_hdr_offload(bss->vif.type))
1022 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED;
1023 if (sdata->wdev.use_4addr &&
1024 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR))
1027 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops :
1028 &ieee80211_dataif_ops;
1031 static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata)
1033 struct ieee80211_local *local = sdata->local;
1034 struct ieee80211_sub_if_data *vsdata;
1036 if (ieee80211_set_sdata_offload_flags(sdata)) {
1037 drv_update_vif_offload(local, sdata);
1038 ieee80211_set_vif_encap_ops(sdata);
1041 list_for_each_entry(vsdata, &local->interfaces, list) {
1042 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN ||
1043 vsdata->bss != &sdata->u.ap)
1046 ieee80211_set_vif_encap_ops(vsdata);
1050 void ieee80211_recalc_offload(struct ieee80211_local *local)
1052 struct ieee80211_sub_if_data *sdata;
1054 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD))
1057 lockdep_assert_wiphy(local->hw.wiphy);
1059 list_for_each_entry(sdata, &local->interfaces, list) {
1060 if (!ieee80211_sdata_running(sdata))
1063 ieee80211_recalc_sdata_offload(sdata);
1067 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1070 struct ieee80211_local *local = sdata->local;
1071 u32 flags = sdata->u.mntr.flags;
1073 #define ADJUST(_f, _s) do { \
1074 if (flags & MONITOR_FLAG_##_f) \
1075 local->fif_##_s += offset; \
1078 ADJUST(FCSFAIL, fcsfail);
1079 ADJUST(PLCPFAIL, plcpfail);
1080 ADJUST(CONTROL, control);
1081 ADJUST(CONTROL, pspoll);
1082 ADJUST(OTHER_BSS, other_bss);
1087 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
1089 struct ieee80211_local *local = sdata->local;
1092 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
1093 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
1094 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
1095 else if (local->hw.queues >= IEEE80211_NUM_ACS)
1096 sdata->vif.hw_queue[i] = i;
1098 sdata->vif.hw_queue[i] = 0;
1100 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
1103 static void ieee80211_sdata_init(struct ieee80211_local *local,
1104 struct ieee80211_sub_if_data *sdata)
1106 sdata->local = local;
1109 * Initialize the default link, so we can use link_id 0 for non-MLD,
1110 * and that continues to work for non-MLD-aware drivers that use just
1111 * vif.bss_conf instead of vif.link_conf.
1113 * Note that we never change this, so if link ID 0 isn't used in an
1114 * MLD connection, we get a separate allocation for it.
1116 ieee80211_link_init(sdata, -1, &sdata->deflink, &sdata->vif.bss_conf);
1119 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
1121 struct ieee80211_sub_if_data *sdata;
1124 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
1128 lockdep_assert_wiphy(local->hw.wiphy);
1130 if (local->monitor_sdata)
1133 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
1138 sdata->vif.type = NL80211_IFTYPE_MONITOR;
1139 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
1140 wiphy_name(local->hw.wiphy));
1141 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
1142 sdata->wdev.wiphy = local->hw.wiphy;
1144 ieee80211_sdata_init(local, sdata);
1146 ieee80211_set_default_queues(sdata);
1148 ret = drv_add_interface(local, sdata);
1150 /* ok .. stupid driver, it asked for this! */
1155 set_bit(SDATA_STATE_RUNNING, &sdata->state);
1157 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
1163 mutex_lock(&local->iflist_mtx);
1164 rcu_assign_pointer(local->monitor_sdata, sdata);
1165 mutex_unlock(&local->iflist_mtx);
1167 ret = ieee80211_link_use_channel(&sdata->deflink, &local->monitor_chandef,
1168 IEEE80211_CHANCTX_EXCLUSIVE);
1170 mutex_lock(&local->iflist_mtx);
1171 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1172 mutex_unlock(&local->iflist_mtx);
1174 drv_remove_interface(local, sdata);
1179 skb_queue_head_init(&sdata->skb_queue);
1180 skb_queue_head_init(&sdata->status_queue);
1181 wiphy_work_init(&sdata->work, ieee80211_iface_work);
1186 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
1188 struct ieee80211_sub_if_data *sdata;
1190 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
1194 lockdep_assert_wiphy(local->hw.wiphy);
1196 mutex_lock(&local->iflist_mtx);
1198 sdata = rcu_dereference_protected(local->monitor_sdata,
1199 lockdep_is_held(&local->iflist_mtx));
1201 mutex_unlock(&local->iflist_mtx);
1205 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1206 mutex_unlock(&local->iflist_mtx);
1210 ieee80211_link_release_channel(&sdata->deflink);
1212 drv_remove_interface(local, sdata);
1218 * NOTE: Be very careful when changing this function, it must NOT return
1219 * an error on interface type changes that have been pre-checked, so most
1220 * checks should be in ieee80211_check_concurrent_iface.
1222 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
1224 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
1225 struct net_device *dev = wdev->netdev;
1226 struct ieee80211_local *local = sdata->local;
1229 u32 hw_reconf_flags = 0;
1231 lockdep_assert_wiphy(local->hw.wiphy);
1233 switch (sdata->vif.type) {
1234 case NL80211_IFTYPE_AP_VLAN: {
1235 struct ieee80211_sub_if_data *master;
1240 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
1242 master = container_of(sdata->bss,
1243 struct ieee80211_sub_if_data, u.ap);
1244 sdata->control_port_protocol =
1245 master->control_port_protocol;
1246 sdata->control_port_no_encrypt =
1247 master->control_port_no_encrypt;
1248 sdata->control_port_over_nl80211 =
1249 master->control_port_over_nl80211;
1250 sdata->control_port_no_preauth =
1251 master->control_port_no_preauth;
1252 sdata->vif.cab_queue = master->vif.cab_queue;
1253 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
1254 sizeof(sdata->vif.hw_queue));
1255 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
1257 sdata->crypto_tx_tailroom_needed_cnt +=
1258 master->crypto_tx_tailroom_needed_cnt;
1262 case NL80211_IFTYPE_AP:
1263 sdata->bss = &sdata->u.ap;
1265 case NL80211_IFTYPE_MESH_POINT:
1266 case NL80211_IFTYPE_STATION:
1267 case NL80211_IFTYPE_MONITOR:
1268 case NL80211_IFTYPE_ADHOC:
1269 case NL80211_IFTYPE_P2P_DEVICE:
1270 case NL80211_IFTYPE_OCB:
1271 case NL80211_IFTYPE_NAN:
1272 /* no special treatment */
1274 case NL80211_IFTYPE_UNSPECIFIED:
1275 case NUM_NL80211_IFTYPES:
1276 case NL80211_IFTYPE_P2P_CLIENT:
1277 case NL80211_IFTYPE_P2P_GO:
1278 case NL80211_IFTYPE_WDS:
1284 if (local->open_count == 0) {
1285 /* here we can consider everything in good order (again) */
1286 local->reconfig_failure = false;
1288 res = drv_start(local);
1291 /* we're brought up, everything changes */
1292 hw_reconf_flags = ~0;
1293 ieee80211_led_radio(local, true);
1294 ieee80211_mod_tpt_led_trig(local,
1295 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1299 * Copy the hopefully now-present MAC address to
1300 * this interface, if it has the special null one.
1302 if (dev && is_zero_ether_addr(dev->dev_addr)) {
1303 eth_hw_addr_set(dev, local->hw.wiphy->perm_addr);
1304 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
1306 if (!is_valid_ether_addr(dev->dev_addr)) {
1307 res = -EADDRNOTAVAIL;
1312 switch (sdata->vif.type) {
1313 case NL80211_IFTYPE_AP_VLAN:
1314 /* no need to tell driver, but set carrier and chanctx */
1315 if (sdata->bss->active) {
1316 ieee80211_link_vlan_copy_chanctx(&sdata->deflink);
1317 netif_carrier_on(dev);
1318 ieee80211_set_vif_encap_ops(sdata);
1320 netif_carrier_off(dev);
1323 case NL80211_IFTYPE_MONITOR:
1324 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
1325 local->cooked_mntrs++;
1329 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
1330 res = drv_add_interface(local, sdata);
1333 } else if (local->monitors == 0 && local->open_count == 0) {
1334 res = ieee80211_add_virtual_monitor(local);
1339 /* must be before the call to ieee80211_configure_filter */
1341 if (local->monitors == 1) {
1342 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
1343 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
1346 ieee80211_adjust_monitor_flags(sdata, 1);
1347 ieee80211_configure_filter(local);
1348 ieee80211_recalc_offload(local);
1349 ieee80211_recalc_idle(local);
1351 netif_carrier_on(dev);
1355 ieee80211_del_virtual_monitor(local);
1356 ieee80211_set_sdata_offload_flags(sdata);
1358 res = drv_add_interface(local, sdata);
1362 ieee80211_set_vif_encap_ops(sdata);
1363 res = ieee80211_check_queues(sdata,
1364 ieee80211_vif_type_p2p(&sdata->vif));
1366 goto err_del_interface;
1369 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1370 local->fif_pspoll++;
1371 local->fif_probe_req++;
1373 ieee80211_configure_filter(local);
1374 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1375 local->fif_probe_req++;
1378 if (sdata->vif.probe_req_reg)
1379 drv_config_iface_filter(local, sdata,
1383 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1384 sdata->vif.type != NL80211_IFTYPE_NAN)
1385 changed |= ieee80211_reset_erp_info(sdata);
1386 ieee80211_link_info_change_notify(sdata, &sdata->deflink,
1389 switch (sdata->vif.type) {
1390 case NL80211_IFTYPE_STATION:
1391 case NL80211_IFTYPE_ADHOC:
1392 case NL80211_IFTYPE_AP:
1393 case NL80211_IFTYPE_MESH_POINT:
1394 case NL80211_IFTYPE_OCB:
1395 netif_carrier_off(dev);
1397 case NL80211_IFTYPE_P2P_DEVICE:
1398 case NL80211_IFTYPE_NAN:
1406 * Set default queue parameters so drivers don't
1407 * need to initialise the hardware if the hardware
1408 * doesn't start up with sane defaults.
1409 * Enable QoS for anything but station interfaces.
1411 ieee80211_set_wmm_default(&sdata->deflink, true,
1412 sdata->vif.type != NL80211_IFTYPE_STATION);
1415 switch (sdata->vif.type) {
1416 case NL80211_IFTYPE_P2P_DEVICE:
1417 rcu_assign_pointer(local->p2p_sdata, sdata);
1419 case NL80211_IFTYPE_MONITOR:
1420 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
1422 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
1429 * set_multicast_list will be invoked by the networking core
1430 * which will check whether any increments here were done in
1431 * error and sync them down to the hardware as filter flags.
1433 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
1434 atomic_inc(&local->iff_allmultis);
1437 local->open_count++;
1439 if (hw_reconf_flags)
1440 ieee80211_hw_config(local, hw_reconf_flags);
1442 ieee80211_recalc_ps(local);
1444 set_bit(SDATA_STATE_RUNNING, &sdata->state);
1448 drv_remove_interface(local, sdata);
1450 if (!local->open_count)
1454 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1455 list_del(&sdata->u.vlan.list);
1456 /* might already be clear but that doesn't matter */
1457 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
1461 static void ieee80211_if_free(struct net_device *dev)
1463 free_percpu(dev->tstats);
1466 static void ieee80211_if_setup(struct net_device *dev)
1469 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1470 dev->priv_flags |= IFF_NO_QUEUE;
1471 dev->netdev_ops = &ieee80211_dataif_ops;
1472 dev->needs_free_netdev = true;
1473 dev->priv_destructor = ieee80211_if_free;
1476 static void ieee80211_iface_process_skb(struct ieee80211_local *local,
1477 struct ieee80211_sub_if_data *sdata,
1478 struct sk_buff *skb)
1480 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1482 lockdep_assert_wiphy(local->hw.wiphy);
1484 if (ieee80211_is_action(mgmt->frame_control) &&
1485 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1486 struct sta_info *sta;
1489 sta = sta_info_get_bss(sdata, mgmt->sa);
1491 switch (mgmt->u.action.u.addba_req.action_code) {
1492 case WLAN_ACTION_ADDBA_REQ:
1493 ieee80211_process_addba_request(local, sta,
1496 case WLAN_ACTION_ADDBA_RESP:
1497 ieee80211_process_addba_resp(local, sta,
1500 case WLAN_ACTION_DELBA:
1501 ieee80211_process_delba(sdata, sta,
1509 } else if (ieee80211_is_action(mgmt->frame_control) &&
1510 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1511 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1512 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1513 struct ieee80211_rx_status *status;
1514 enum nl80211_band band;
1515 struct sta_info *sta;
1518 status = IEEE80211_SKB_RXCB(skb);
1519 band = status->band;
1520 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1522 sta = sta_info_get_bss(sdata, mgmt->sa);
1525 ieee80211_vht_handle_opmode(sdata,
1531 case WLAN_VHT_ACTION_GROUPID_MGMT:
1532 ieee80211_process_mu_groups(sdata, &sdata->deflink,
1539 } else if (ieee80211_is_action(mgmt->frame_control) &&
1540 mgmt->u.action.category == WLAN_CATEGORY_S1G) {
1541 switch (mgmt->u.action.u.s1g.action_code) {
1542 case WLAN_S1G_TWT_TEARDOWN:
1543 case WLAN_S1G_TWT_SETUP:
1544 ieee80211_s1g_rx_twt_action(sdata, skb);
1549 } else if (ieee80211_is_ext(mgmt->frame_control)) {
1550 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1551 ieee80211_sta_rx_queued_ext(sdata, skb);
1554 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1555 struct ieee80211_hdr *hdr = (void *)mgmt;
1556 struct sta_info *sta;
1559 * So the frame isn't mgmt, but frame_control
1560 * is at the right place anyway, of course, so
1561 * the if statement is correct.
1563 * Warn if we have other data frame types here,
1564 * they must not get here.
1566 WARN_ON(hdr->frame_control &
1567 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1568 WARN_ON(!(hdr->seq_ctrl &
1569 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1571 * This was a fragment of a frame, received while
1572 * a block-ack session was active. That cannot be
1573 * right, so terminate the session.
1575 sta = sta_info_get_bss(sdata, mgmt->sa);
1577 u16 tid = ieee80211_get_tid(hdr);
1579 __ieee80211_stop_rx_ba_session(
1580 sta, tid, WLAN_BACK_RECIPIENT,
1581 WLAN_REASON_QSTA_REQUIRE_SETUP,
1584 } else switch (sdata->vif.type) {
1585 case NL80211_IFTYPE_STATION:
1586 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1588 case NL80211_IFTYPE_ADHOC:
1589 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1591 case NL80211_IFTYPE_MESH_POINT:
1592 if (!ieee80211_vif_is_mesh(&sdata->vif))
1594 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1597 WARN(1, "frame for unexpected interface type");
1602 static void ieee80211_iface_process_status(struct ieee80211_sub_if_data *sdata,
1603 struct sk_buff *skb)
1605 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1607 if (ieee80211_is_action(mgmt->frame_control) &&
1608 mgmt->u.action.category == WLAN_CATEGORY_S1G) {
1609 switch (mgmt->u.action.u.s1g.action_code) {
1610 case WLAN_S1G_TWT_TEARDOWN:
1611 case WLAN_S1G_TWT_SETUP:
1612 ieee80211_s1g_status_twt_action(sdata, skb);
1620 static void ieee80211_iface_work(struct wiphy *wiphy, struct wiphy_work *work)
1622 struct ieee80211_sub_if_data *sdata =
1623 container_of(work, struct ieee80211_sub_if_data, work);
1624 struct ieee80211_local *local = sdata->local;
1625 struct sk_buff *skb;
1627 if (!ieee80211_sdata_running(sdata))
1630 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1633 if (!ieee80211_can_run_worker(local))
1636 /* first process frames */
1637 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1638 kcov_remote_start_common(skb_get_kcov_handle(skb));
1640 if (skb->protocol == cpu_to_be16(ETH_P_TDLS))
1641 ieee80211_process_tdls_channel_switch(sdata, skb);
1643 ieee80211_iface_process_skb(local, sdata, skb);
1649 /* process status queue */
1650 while ((skb = skb_dequeue(&sdata->status_queue))) {
1651 kcov_remote_start_common(skb_get_kcov_handle(skb));
1653 ieee80211_iface_process_status(sdata, skb);
1659 /* then other type-dependent work */
1660 switch (sdata->vif.type) {
1661 case NL80211_IFTYPE_STATION:
1662 ieee80211_sta_work(sdata);
1664 case NL80211_IFTYPE_ADHOC:
1665 ieee80211_ibss_work(sdata);
1667 case NL80211_IFTYPE_MESH_POINT:
1668 if (!ieee80211_vif_is_mesh(&sdata->vif))
1670 ieee80211_mesh_work(sdata);
1672 case NL80211_IFTYPE_OCB:
1673 ieee80211_ocb_work(sdata);
1680 static void ieee80211_activate_links_work(struct wiphy *wiphy,
1681 struct wiphy_work *work)
1683 struct ieee80211_sub_if_data *sdata =
1684 container_of(work, struct ieee80211_sub_if_data,
1685 activate_links_work);
1687 ieee80211_set_active_links(&sdata->vif, sdata->desired_active_links);
1691 * Helper function to initialise an interface to a specific type.
1693 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1694 enum nl80211_iftype type)
1696 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1699 /* clear type-dependent unions */
1700 memset(&sdata->u, 0, sizeof(sdata->u));
1701 memset(&sdata->deflink.u, 0, sizeof(sdata->deflink.u));
1703 /* and set some type-dependent values */
1704 sdata->vif.type = type;
1705 sdata->vif.p2p = false;
1706 sdata->wdev.iftype = type;
1708 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1709 sdata->control_port_no_encrypt = false;
1710 sdata->control_port_over_nl80211 = false;
1711 sdata->control_port_no_preauth = false;
1712 sdata->vif.cfg.idle = true;
1713 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */
1715 sdata->noack_map = 0;
1717 /* only monitor/p2p-device differ */
1719 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1720 sdata->dev->type = ARPHRD_ETHER;
1723 skb_queue_head_init(&sdata->skb_queue);
1724 skb_queue_head_init(&sdata->status_queue);
1725 wiphy_work_init(&sdata->work, ieee80211_iface_work);
1726 wiphy_work_init(&sdata->activate_links_work,
1727 ieee80211_activate_links_work);
1730 case NL80211_IFTYPE_P2P_GO:
1731 type = NL80211_IFTYPE_AP;
1732 sdata->vif.type = type;
1733 sdata->vif.p2p = true;
1735 case NL80211_IFTYPE_AP:
1736 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1737 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1738 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1740 case NL80211_IFTYPE_P2P_CLIENT:
1741 type = NL80211_IFTYPE_STATION;
1742 sdata->vif.type = type;
1743 sdata->vif.p2p = true;
1745 case NL80211_IFTYPE_STATION:
1746 sdata->vif.bss_conf.bssid = sdata->deflink.u.mgd.bssid;
1747 ieee80211_sta_setup_sdata(sdata);
1749 case NL80211_IFTYPE_OCB:
1750 sdata->vif.bss_conf.bssid = bssid_wildcard;
1751 ieee80211_ocb_setup_sdata(sdata);
1753 case NL80211_IFTYPE_ADHOC:
1754 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1755 ieee80211_ibss_setup_sdata(sdata);
1757 case NL80211_IFTYPE_MESH_POINT:
1758 if (ieee80211_vif_is_mesh(&sdata->vif))
1759 ieee80211_mesh_init_sdata(sdata);
1761 case NL80211_IFTYPE_MONITOR:
1762 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1763 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1764 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1765 MONITOR_FLAG_OTHER_BSS;
1767 case NL80211_IFTYPE_NAN:
1768 idr_init(&sdata->u.nan.function_inst_ids);
1769 spin_lock_init(&sdata->u.nan.func_lock);
1770 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1772 case NL80211_IFTYPE_AP_VLAN:
1773 case NL80211_IFTYPE_P2P_DEVICE:
1774 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1776 case NL80211_IFTYPE_UNSPECIFIED:
1777 case NL80211_IFTYPE_WDS:
1778 case NUM_NL80211_IFTYPES:
1783 /* need to do this after the switch so vif.type is correct */
1784 ieee80211_link_setup(&sdata->deflink);
1786 ieee80211_debugfs_recreate_netdev(sdata, false);
1789 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1790 enum nl80211_iftype type)
1792 struct ieee80211_local *local = sdata->local;
1794 enum nl80211_iftype internal_type = type;
1799 if (!local->ops->change_interface)
1802 /* for now, don't support changing while links exist */
1803 if (ieee80211_vif_is_mld(&sdata->vif))
1806 switch (sdata->vif.type) {
1807 case NL80211_IFTYPE_AP:
1808 if (!list_empty(&sdata->u.ap.vlans))
1811 case NL80211_IFTYPE_STATION:
1812 case NL80211_IFTYPE_ADHOC:
1813 case NL80211_IFTYPE_OCB:
1815 * Could maybe also all others here?
1816 * Just not sure how that interacts
1817 * with the RX/config path e.g. for
1826 case NL80211_IFTYPE_AP:
1827 case NL80211_IFTYPE_STATION:
1828 case NL80211_IFTYPE_ADHOC:
1829 case NL80211_IFTYPE_OCB:
1831 * Could probably support everything
1835 case NL80211_IFTYPE_P2P_CLIENT:
1837 internal_type = NL80211_IFTYPE_STATION;
1839 case NL80211_IFTYPE_P2P_GO:
1841 internal_type = NL80211_IFTYPE_AP;
1847 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1851 ieee80211_stop_vif_queues(local, sdata,
1852 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1853 /* do_stop will synchronize_rcu() first thing */
1854 ieee80211_do_stop(sdata, false);
1856 ieee80211_teardown_sdata(sdata);
1858 ieee80211_set_sdata_offload_flags(sdata);
1859 ret = drv_change_interface(local, sdata, internal_type, p2p);
1861 type = ieee80211_vif_type_p2p(&sdata->vif);
1864 * Ignore return value here, there's not much we can do since
1865 * the driver changed the interface type internally already.
1866 * The warnings will hopefully make driver authors fix it :-)
1868 ieee80211_check_queues(sdata, type);
1870 ieee80211_setup_sdata(sdata, type);
1871 ieee80211_set_vif_encap_ops(sdata);
1873 err = ieee80211_do_open(&sdata->wdev, false);
1874 WARN(err, "type change: do_open returned %d", err);
1876 ieee80211_wake_vif_queues(local, sdata,
1877 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1881 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1882 enum nl80211_iftype type)
1888 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1891 if (ieee80211_sdata_running(sdata)) {
1892 ret = ieee80211_runtime_change_iftype(sdata, type);
1896 /* Purge and reset type-dependent state. */
1897 ieee80211_teardown_sdata(sdata);
1898 ieee80211_setup_sdata(sdata, type);
1901 /* reset some values that shouldn't be kept across type changes */
1902 if (type == NL80211_IFTYPE_STATION)
1903 sdata->u.mgd.use_4addr = false;
1908 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1909 u8 *perm_addr, enum nl80211_iftype type)
1911 struct ieee80211_sub_if_data *sdata;
1912 u64 mask, start, addr, val, inc;
1914 u8 tmp_addr[ETH_ALEN];
1917 lockdep_assert_wiphy(local->hw.wiphy);
1919 /* default ... something at least */
1920 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1922 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1923 local->hw.wiphy->n_addresses <= 1)
1927 case NL80211_IFTYPE_MONITOR:
1928 /* doesn't matter */
1930 case NL80211_IFTYPE_AP_VLAN:
1931 /* match up with an AP interface */
1932 list_for_each_entry(sdata, &local->interfaces, list) {
1933 if (sdata->vif.type != NL80211_IFTYPE_AP)
1935 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1938 /* keep default if no AP interface present */
1940 case NL80211_IFTYPE_P2P_CLIENT:
1941 case NL80211_IFTYPE_P2P_GO:
1942 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
1943 list_for_each_entry(sdata, &local->interfaces, list) {
1944 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1946 if (!ieee80211_sdata_running(sdata))
1948 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1954 /* assign a new address if possible -- try n_addresses first */
1955 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1958 list_for_each_entry(sdata, &local->interfaces, list) {
1959 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1968 local->hw.wiphy->addresses[i].addr,
1974 /* try mask if available */
1975 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1978 m = local->hw.wiphy->addr_mask;
1979 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1980 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1981 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1983 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1984 /* not a contiguous mask ... not handled now! */
1985 pr_info("not contiguous\n");
1990 * Pick address of existing interface in case user changed
1991 * MAC address manually, default to perm_addr.
1993 m = local->hw.wiphy->perm_addr;
1994 list_for_each_entry(sdata, &local->interfaces, list) {
1995 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1997 m = sdata->vif.addr;
2000 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
2001 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
2002 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
2004 inc = 1ULL<<__ffs64(mask);
2005 val = (start & mask);
2006 addr = (start & ~mask) | (val & mask);
2010 tmp_addr[5] = addr >> 0*8;
2011 tmp_addr[4] = addr >> 1*8;
2012 tmp_addr[3] = addr >> 2*8;
2013 tmp_addr[2] = addr >> 3*8;
2014 tmp_addr[1] = addr >> 4*8;
2015 tmp_addr[0] = addr >> 5*8;
2019 list_for_each_entry(sdata, &local->interfaces, list) {
2020 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
2027 memcpy(perm_addr, tmp_addr, ETH_ALEN);
2030 addr = (start & ~mask) | (val & mask);
2031 } while (addr != start);
2037 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
2038 unsigned char name_assign_type,
2039 struct wireless_dev **new_wdev, enum nl80211_iftype type,
2040 struct vif_params *params)
2042 struct net_device *ndev = NULL;
2043 struct ieee80211_sub_if_data *sdata = NULL;
2044 struct txq_info *txqi;
2048 lockdep_assert_wiphy(local->hw.wiphy);
2050 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
2051 struct wireless_dev *wdev;
2053 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
2057 wdev = &sdata->wdev;
2060 strscpy(sdata->name, name, IFNAMSIZ);
2061 ieee80211_assign_perm_addr(local, wdev->address, type);
2062 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
2063 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
2065 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
2069 if (type != NL80211_IFTYPE_AP_VLAN &&
2070 (type != NL80211_IFTYPE_MONITOR ||
2071 (params->flags & MONITOR_FLAG_ACTIVE)))
2072 txq_size += sizeof(struct txq_info) +
2073 local->hw.txq_data_size;
2075 ndev = alloc_netdev_mqs(size + txq_size,
2076 name, name_assign_type,
2077 ieee80211_if_setup, 1, 1);
2081 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
2083 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
2084 if (!ndev->tstats) {
2089 ndev->needed_headroom = local->tx_headroom +
2090 4*6 /* four MAC addresses */
2091 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
2093 + 8 /* rfc1042/bridge tunnel */
2094 - ETH_HLEN /* ethernet hard_header_len */
2095 + IEEE80211_ENCRYPT_HEADROOM;
2096 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
2098 ret = dev_alloc_name(ndev, ndev->name);
2100 ieee80211_if_free(ndev);
2105 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
2106 if (is_valid_ether_addr(params->macaddr))
2107 eth_hw_addr_set(ndev, params->macaddr);
2109 eth_hw_addr_set(ndev, ndev->perm_addr);
2110 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
2112 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
2113 sdata = netdev_priv(ndev);
2114 ndev->ieee80211_ptr = &sdata->wdev;
2115 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
2116 ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
2117 memcpy(sdata->name, ndev->name, IFNAMSIZ);
2120 txqi = netdev_priv(ndev) + size;
2121 ieee80211_txq_init(sdata, NULL, txqi, 0);
2127 /* initialise type-independent data */
2128 sdata->wdev.wiphy = local->hw.wiphy;
2130 ieee80211_sdata_init(local, sdata);
2132 ieee80211_init_frag_cache(&sdata->frags);
2134 INIT_LIST_HEAD(&sdata->key_list);
2136 wiphy_delayed_work_init(&sdata->dec_tailroom_needed_wk,
2137 ieee80211_delayed_tailroom_dec);
2139 for (i = 0; i < NUM_NL80211_BANDS; i++) {
2140 struct ieee80211_supported_band *sband;
2141 sband = local->hw.wiphy->bands[i];
2142 sdata->rc_rateidx_mask[i] =
2143 sband ? (1 << sband->n_bitrates) - 1 : 0;
2148 memcpy(sdata->rc_rateidx_mcs_mask[i],
2149 sband->ht_cap.mcs.rx_mask,
2150 sizeof(sdata->rc_rateidx_mcs_mask[i]));
2152 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
2153 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
2154 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
2156 memset(sdata->rc_rateidx_mcs_mask[i], 0,
2157 sizeof(sdata->rc_rateidx_mcs_mask[i]));
2158 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
2159 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
2163 ieee80211_set_default_queues(sdata);
2165 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2166 sdata->deflink.user_power_level = local->user_power_level;
2168 /* setup type-dependent data */
2169 ieee80211_setup_sdata(sdata, type);
2172 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
2173 if (type == NL80211_IFTYPE_STATION)
2174 sdata->u.mgd.use_4addr = params->use_4addr;
2176 ndev->features |= local->hw.netdev_features;
2177 ndev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
2178 ndev->hw_features |= ndev->features &
2179 MAC80211_SUPPORTED_FEATURES_TX;
2180 sdata->vif.netdev_features = local->hw.netdev_features;
2182 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
2184 /* MTU range is normally 256 - 2304, where the upper limit is
2185 * the maximum MSDU size. Monitor interfaces send and receive
2186 * MPDU and A-MSDU frames which may be much larger so we do
2187 * not impose an upper limit in that case.
2189 ndev->min_mtu = 256;
2190 if (type == NL80211_IFTYPE_MONITOR)
2193 ndev->max_mtu = local->hw.max_mtu;
2195 ret = cfg80211_register_netdevice(ndev);
2202 mutex_lock(&local->iflist_mtx);
2203 list_add_tail_rcu(&sdata->list, &local->interfaces);
2204 mutex_unlock(&local->iflist_mtx);
2207 *new_wdev = &sdata->wdev;
2212 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
2215 lockdep_assert_wiphy(sdata->local->hw.wiphy);
2217 mutex_lock(&sdata->local->iflist_mtx);
2218 list_del_rcu(&sdata->list);
2219 mutex_unlock(&sdata->local->iflist_mtx);
2222 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
2226 cfg80211_unregister_wdev(&sdata->wdev);
2229 ieee80211_teardown_sdata(sdata);
2234 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
2236 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
2238 ieee80211_do_stop(sdata, true);
2241 void ieee80211_remove_interfaces(struct ieee80211_local *local)
2243 struct ieee80211_sub_if_data *sdata, *tmp;
2244 LIST_HEAD(unreg_list);
2248 /* Before destroying the interfaces, make sure they're all stopped so
2249 * that the hardware is stopped. Otherwise, the driver might still be
2250 * iterating the interfaces during the shutdown, e.g. from a worker
2251 * or from RX processing or similar, and if it does so (using atomic
2252 * iteration) while we're manipulating the list, the iteration will
2255 * After this, the hardware should be stopped and the driver should
2256 * have stopped all of its activities, so that we can do RCU-unaware
2257 * manipulations of the interface list below.
2259 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2261 wiphy_lock(local->hw.wiphy);
2263 WARN(local->open_count, "%s: open count remains %d\n",
2264 wiphy_name(local->hw.wiphy), local->open_count);
2266 mutex_lock(&local->iflist_mtx);
2267 list_splice_init(&local->interfaces, &unreg_list);
2268 mutex_unlock(&local->iflist_mtx);
2270 list_for_each_entry_safe(sdata, tmp, &unreg_list, list) {
2271 bool netdev = sdata->dev;
2274 * Remove IP addresses explicitly, since the notifier will
2275 * skip the callbacks if wdev->registered is false, since
2276 * we can't acquire the wiphy_lock() again there if already
2277 * inside this locked section.
2279 sdata->vif.cfg.arp_addr_cnt = 0;
2280 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
2281 sdata->u.mgd.associated)
2282 ieee80211_vif_cfg_change_notify(sdata,
2283 BSS_CHANGED_ARP_FILTER);
2285 list_del(&sdata->list);
2286 cfg80211_unregister_wdev(&sdata->wdev);
2291 wiphy_unlock(local->hw.wiphy);
2294 static int netdev_notify(struct notifier_block *nb,
2295 unsigned long state, void *ptr)
2297 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2298 struct ieee80211_sub_if_data *sdata;
2300 if (state != NETDEV_CHANGENAME)
2303 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
2306 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
2309 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2310 memcpy(sdata->name, dev->name, IFNAMSIZ);
2311 ieee80211_debugfs_rename_netdev(sdata);
2316 static struct notifier_block mac80211_netdev_notifier = {
2317 .notifier_call = netdev_notify,
2320 int ieee80211_iface_init(void)
2322 return register_netdevice_notifier(&mac80211_netdev_notifier);
2325 void ieee80211_iface_exit(void)
2327 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2330 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2332 if (sdata->vif.type == NL80211_IFTYPE_AP)
2333 atomic_inc(&sdata->u.ap.num_mcast_sta);
2334 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2335 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2338 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2340 if (sdata->vif.type == NL80211_IFTYPE_AP)
2341 atomic_dec(&sdata->u.ap.num_mcast_sta);
2342 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2343 atomic_dec(&sdata->u.vlan.num_mcast_sta);