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) 2018-2021 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
37 * (2) modifications and readers are protected against each other by
39 * (3) modifications are done in an RCU manner so atomic readers
40 * can traverse the list in RCU-safe blocks.
42 * As a consequence, reads (traversals) of the list can be protected
43 * by either the RTNL, the iflist_mtx or RCU.
46 static void ieee80211_iface_work(struct work_struct *work);
48 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
50 struct ieee80211_chanctx_conf *chanctx_conf;
54 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
60 power = ieee80211_chandef_max_power(&chanctx_conf->def);
63 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
64 power = min(power, sdata->user_power_level);
66 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
67 power = min(power, sdata->ap_power_level);
69 if (power != sdata->vif.bss_conf.txpower) {
70 sdata->vif.bss_conf.txpower = power;
71 ieee80211_hw_config(sdata->local, 0);
78 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
81 if (__ieee80211_recalc_txpower(sdata) ||
82 (update_bss && ieee80211_sdata_running(sdata)))
83 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
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_held(&local->mtx);
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 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
166 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
167 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
168 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
170 m = local->hw.wiphy->addr_mask;
171 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
172 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
173 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
178 mutex_lock(&local->iflist_mtx);
179 list_for_each_entry(iter, &local->interfaces, list) {
183 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
184 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE))
188 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
189 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
190 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
192 if ((new & ~mask) != (tmp & ~mask)) {
197 mutex_unlock(&local->iflist_mtx);
202 static int ieee80211_change_mac(struct net_device *dev, void *addr)
204 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
205 struct sockaddr *sa = addr;
206 bool check_dup = true;
209 if (ieee80211_sdata_running(sdata))
212 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
213 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
216 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
220 ret = eth_mac_addr(dev, sa);
223 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
228 static inline int identical_mac_addr_allowed(int type1, int type2)
230 return type1 == NL80211_IFTYPE_MONITOR ||
231 type2 == NL80211_IFTYPE_MONITOR ||
232 type1 == NL80211_IFTYPE_P2P_DEVICE ||
233 type2 == NL80211_IFTYPE_P2P_DEVICE ||
234 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
235 (type1 == NL80211_IFTYPE_AP_VLAN &&
236 (type2 == NL80211_IFTYPE_AP ||
237 type2 == NL80211_IFTYPE_AP_VLAN));
240 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
241 enum nl80211_iftype iftype)
243 struct ieee80211_local *local = sdata->local;
244 struct ieee80211_sub_if_data *nsdata;
249 /* we hold the RTNL here so can safely walk the list */
250 list_for_each_entry(nsdata, &local->interfaces, list) {
251 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
253 * Only OCB and monitor mode may coexist
255 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
256 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
257 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
258 nsdata->vif.type == NL80211_IFTYPE_OCB))
262 * Allow only a single IBSS interface to be up at any
263 * time. This is restricted because beacon distribution
264 * cannot work properly if both are in the same IBSS.
266 * To remove this restriction we'd have to disallow them
267 * from setting the same SSID on different IBSS interfaces
268 * belonging to the same hardware. Then, however, we're
269 * faced with having to adopt two different TSF timers...
271 if (iftype == NL80211_IFTYPE_ADHOC &&
272 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
275 * will not add another interface while any channel
278 if (nsdata->vif.csa_active)
282 * The remaining checks are only performed for interfaces
283 * with the same MAC address.
285 if (!ether_addr_equal(sdata->vif.addr,
290 * check whether it may have the same address
292 if (!identical_mac_addr_allowed(iftype,
297 * can only add VLANs to enabled APs
299 if (iftype == NL80211_IFTYPE_AP_VLAN &&
300 nsdata->vif.type == NL80211_IFTYPE_AP)
301 sdata->bss = &nsdata->u.ap;
305 mutex_lock(&local->chanctx_mtx);
306 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
307 mutex_unlock(&local->chanctx_mtx);
311 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
312 enum nl80211_iftype iftype)
314 int n_queues = sdata->local->hw.queues;
317 if (iftype == NL80211_IFTYPE_NAN)
320 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
321 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
322 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
323 IEEE80211_INVAL_HW_QUEUE))
325 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
331 if ((iftype != NL80211_IFTYPE_AP &&
332 iftype != NL80211_IFTYPE_P2P_GO &&
333 iftype != NL80211_IFTYPE_MESH_POINT) ||
334 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
335 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
339 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
342 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
348 static int ieee80211_open(struct net_device *dev)
350 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
353 /* fail early if user set an invalid address */
354 if (!is_valid_ether_addr(dev->dev_addr))
355 return -EADDRNOTAVAIL;
357 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
361 wiphy_lock(sdata->local->hw.wiphy);
362 err = ieee80211_do_open(&sdata->wdev, true);
363 wiphy_unlock(sdata->local->hw.wiphy);
368 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, bool going_down)
370 struct ieee80211_local *local = sdata->local;
372 struct sk_buff *skb, *tmp;
373 u32 hw_reconf_flags = 0;
376 struct cfg80211_chan_def chandef;
378 struct cfg80211_nan_func *func;
380 spin_lock_bh(&local->fq.lock);
381 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
382 spin_unlock_bh(&local->fq.lock);
384 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
386 ieee80211_scan_cancel(local);
389 * Stop TX on this interface first.
392 netif_tx_stop_all_queues(sdata->dev);
394 ieee80211_roc_purge(local, sdata);
396 switch (sdata->vif.type) {
397 case NL80211_IFTYPE_STATION:
398 ieee80211_mgd_stop(sdata);
400 case NL80211_IFTYPE_ADHOC:
401 ieee80211_ibss_stop(sdata);
403 case NL80211_IFTYPE_MONITOR:
404 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
406 list_del_rcu(&sdata->u.mntr.list);
413 * Remove all stations associated with this interface.
415 * This must be done before calling ops->remove_interface()
416 * because otherwise we can later invoke ops->sta_notify()
417 * whenever the STAs are removed, and that invalidates driver
418 * assumptions about always getting a vif pointer that is valid
419 * (because if we remove a STA after ops->remove_interface()
420 * the driver will have removed the vif info already!)
422 * For AP_VLANs stations may exist since there's nothing else that
423 * would have removed them, but in other modes there shouldn't
426 flushed = sta_info_flush(sdata);
427 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && flushed > 0);
429 /* don't count this interface for allmulti while it is down */
430 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
431 atomic_dec(&local->iff_allmultis);
433 if (sdata->vif.type == NL80211_IFTYPE_AP) {
435 local->fif_probe_req--;
436 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
437 local->fif_probe_req--;
441 netif_addr_lock_bh(sdata->dev);
442 spin_lock_bh(&local->filter_lock);
443 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
444 sdata->dev->addr_len);
445 spin_unlock_bh(&local->filter_lock);
446 netif_addr_unlock_bh(sdata->dev);
449 del_timer_sync(&local->dynamic_ps_timer);
450 cancel_work_sync(&local->dynamic_ps_enable_work);
452 cancel_work_sync(&sdata->recalc_smps);
454 mutex_lock(&local->mtx);
455 sdata->vif.csa_active = false;
456 if (sdata->vif.type == NL80211_IFTYPE_STATION)
457 sdata->u.mgd.csa_waiting_bcn = false;
458 if (sdata->csa_block_tx) {
459 ieee80211_wake_vif_queues(local, sdata,
460 IEEE80211_QUEUE_STOP_REASON_CSA);
461 sdata->csa_block_tx = false;
463 mutex_unlock(&local->mtx);
466 cancel_work_sync(&sdata->csa_finalize_work);
467 cancel_work_sync(&sdata->color_change_finalize_work);
469 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
471 if (sdata->wdev.cac_started) {
472 chandef = sdata->vif.bss_conf.chandef;
473 WARN_ON(local->suspended);
474 mutex_lock(&local->mtx);
475 ieee80211_vif_release_channel(sdata);
476 mutex_unlock(&local->mtx);
477 cfg80211_cac_event(sdata->dev, &chandef,
478 NL80211_RADAR_CAC_ABORTED,
482 if (sdata->vif.type == NL80211_IFTYPE_AP) {
483 WARN_ON(!list_empty(&sdata->u.ap.vlans));
484 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
485 /* remove all packets in parent bc_buf pointing to this dev */
486 ps = &sdata->bss->ps;
488 spin_lock_irqsave(&ps->bc_buf.lock, flags);
489 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
490 if (skb->dev == sdata->dev) {
491 __skb_unlink(skb, &ps->bc_buf);
492 local->total_ps_buffered--;
493 ieee80211_free_txskb(&local->hw, skb);
496 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
502 switch (sdata->vif.type) {
503 case NL80211_IFTYPE_AP_VLAN:
504 mutex_lock(&local->mtx);
505 list_del(&sdata->u.vlan.list);
506 mutex_unlock(&local->mtx);
507 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
508 /* see comment in the default case below */
509 ieee80211_free_keys(sdata, true);
510 /* no need to tell driver */
512 case NL80211_IFTYPE_MONITOR:
513 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
514 local->cooked_mntrs--;
519 if (local->monitors == 0) {
520 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
521 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
524 ieee80211_adjust_monitor_flags(sdata, -1);
526 case NL80211_IFTYPE_NAN:
527 /* clean all the functions */
528 spin_lock_bh(&sdata->u.nan.func_lock);
530 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
531 idr_remove(&sdata->u.nan.function_inst_ids, i);
532 cfg80211_free_nan_func(func);
534 idr_destroy(&sdata->u.nan.function_inst_ids);
536 spin_unlock_bh(&sdata->u.nan.func_lock);
538 case NL80211_IFTYPE_P2P_DEVICE:
539 /* relies on synchronize_rcu() below */
540 RCU_INIT_POINTER(local->p2p_sdata, NULL);
543 cancel_work_sync(&sdata->work);
545 * When we get here, the interface is marked down.
546 * Free the remaining keys, if there are any
547 * (which can happen in AP mode if userspace sets
548 * keys before the interface is operating)
550 * Force the key freeing to always synchronize_net()
551 * to wait for the RX path in case it is using this
552 * interface enqueuing frames at this very time on
555 ieee80211_free_keys(sdata, true);
556 skb_queue_purge(&sdata->skb_queue);
557 skb_queue_purge(&sdata->status_queue);
560 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
561 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
562 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
563 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
564 if (info->control.vif == &sdata->vif) {
565 __skb_unlink(skb, &local->pending[i]);
566 ieee80211_free_txskb(&local->hw, skb);
570 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
572 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
573 ieee80211_txq_remove_vlan(local, sdata);
577 if (local->open_count == 0)
578 ieee80211_clear_tx_pending(local);
580 sdata->vif.bss_conf.beacon_int = 0;
583 * If the interface goes down while suspended, presumably because
584 * the device was unplugged and that happens before our resume,
585 * then the driver is already unconfigured and the remainder of
586 * this function isn't needed.
587 * XXX: what about WoWLAN? If the device has software state, e.g.
588 * memory allocated, it might expect teardown commands from
591 if (local->suspended) {
592 WARN_ON(local->wowlan);
593 WARN_ON(rcu_access_pointer(local->monitor_sdata));
597 switch (sdata->vif.type) {
598 case NL80211_IFTYPE_AP_VLAN:
600 case NL80211_IFTYPE_MONITOR:
601 if (local->monitors == 0)
602 ieee80211_del_virtual_monitor(local);
604 mutex_lock(&local->mtx);
605 ieee80211_recalc_idle(local);
606 mutex_unlock(&local->mtx);
608 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
614 drv_remove_interface(local, sdata);
617 ieee80211_recalc_ps(local);
620 flush_delayed_work(&local->scan_work);
622 if (local->open_count == 0) {
623 ieee80211_stop_device(local);
625 /* no reconfiguring after stop! */
629 /* do after stop to avoid reconfiguring when we stop anyway */
630 ieee80211_configure_filter(local);
631 ieee80211_hw_config(local, hw_reconf_flags);
633 if (local->monitors == local->open_count)
634 ieee80211_add_virtual_monitor(local);
637 static void ieee80211_stop_mbssid(struct ieee80211_sub_if_data *sdata)
639 struct ieee80211_sub_if_data *tx_sdata, *non_tx_sdata, *tmp_sdata;
640 struct ieee80211_vif *tx_vif = sdata->vif.mbssid_tx_vif;
645 tx_sdata = vif_to_sdata(tx_vif);
646 sdata->vif.mbssid_tx_vif = NULL;
648 list_for_each_entry_safe(non_tx_sdata, tmp_sdata,
649 &tx_sdata->local->interfaces, list) {
650 if (non_tx_sdata != sdata && non_tx_sdata != tx_sdata &&
651 non_tx_sdata->vif.mbssid_tx_vif == tx_vif &&
652 ieee80211_sdata_running(non_tx_sdata)) {
653 non_tx_sdata->vif.mbssid_tx_vif = NULL;
654 dev_close(non_tx_sdata->wdev.netdev);
658 if (sdata != tx_sdata && ieee80211_sdata_running(tx_sdata)) {
659 tx_sdata->vif.mbssid_tx_vif = NULL;
660 dev_close(tx_sdata->wdev.netdev);
664 static int ieee80211_stop(struct net_device *dev)
666 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
668 /* close dependent VLAN and MBSSID interfaces before locking wiphy */
669 if (sdata->vif.type == NL80211_IFTYPE_AP) {
670 struct ieee80211_sub_if_data *vlan, *tmpsdata;
672 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
674 dev_close(vlan->dev);
676 ieee80211_stop_mbssid(sdata);
679 wiphy_lock(sdata->local->hw.wiphy);
680 ieee80211_do_stop(sdata, true);
681 wiphy_unlock(sdata->local->hw.wiphy);
686 static void ieee80211_set_multicast_list(struct net_device *dev)
688 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
689 struct ieee80211_local *local = sdata->local;
690 int allmulti, sdata_allmulti;
692 allmulti = !!(dev->flags & IFF_ALLMULTI);
693 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
695 if (allmulti != sdata_allmulti) {
696 if (dev->flags & IFF_ALLMULTI)
697 atomic_inc(&local->iff_allmultis);
699 atomic_dec(&local->iff_allmultis);
700 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
703 spin_lock_bh(&local->filter_lock);
704 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
705 spin_unlock_bh(&local->filter_lock);
706 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
710 * Called when the netdev is removed or, by the code below, before
711 * the interface type changes.
713 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
715 /* free extra data */
716 ieee80211_free_keys(sdata, false);
718 ieee80211_debugfs_remove_netdev(sdata);
720 ieee80211_destroy_frag_cache(&sdata->frags);
722 if (ieee80211_vif_is_mesh(&sdata->vif))
723 ieee80211_mesh_teardown_sdata(sdata);
726 static void ieee80211_uninit(struct net_device *dev)
728 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
731 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
733 struct net_device *sb_dev)
735 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
739 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
741 dev_fetch_sw_netstats(stats, dev->tstats);
744 static const struct net_device_ops ieee80211_dataif_ops = {
745 .ndo_open = ieee80211_open,
746 .ndo_stop = ieee80211_stop,
747 .ndo_uninit = ieee80211_uninit,
748 .ndo_start_xmit = ieee80211_subif_start_xmit,
749 .ndo_set_rx_mode = ieee80211_set_multicast_list,
750 .ndo_set_mac_address = ieee80211_change_mac,
751 .ndo_select_queue = ieee80211_netdev_select_queue,
752 .ndo_get_stats64 = ieee80211_get_stats64,
755 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
757 struct net_device *sb_dev)
759 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
760 struct ieee80211_local *local = sdata->local;
761 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
762 struct ieee80211_hdr *hdr;
765 if (local->hw.queues < IEEE80211_NUM_ACS)
768 /* reset flags and info before parsing radiotap header */
769 memset(info, 0, sizeof(*info));
771 if (!ieee80211_parse_tx_radiotap(skb, dev))
772 return 0; /* doesn't matter, frame will be dropped */
774 len_rthdr = ieee80211_get_radiotap_len(skb->data);
775 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
776 if (skb->len < len_rthdr + 2 ||
777 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control))
778 return 0; /* doesn't matter, frame will be dropped */
780 return ieee80211_select_queue_80211(sdata, skb, hdr);
783 static const struct net_device_ops ieee80211_monitorif_ops = {
784 .ndo_open = ieee80211_open,
785 .ndo_stop = ieee80211_stop,
786 .ndo_uninit = ieee80211_uninit,
787 .ndo_start_xmit = ieee80211_monitor_start_xmit,
788 .ndo_set_rx_mode = ieee80211_set_multicast_list,
789 .ndo_set_mac_address = ieee80211_change_mac,
790 .ndo_select_queue = ieee80211_monitor_select_queue,
791 .ndo_get_stats64 = ieee80211_get_stats64,
794 static int ieee80211_netdev_fill_forward_path(struct net_device_path_ctx *ctx,
795 struct net_device_path *path)
797 struct ieee80211_sub_if_data *sdata;
798 struct ieee80211_local *local;
799 struct sta_info *sta;
802 sdata = IEEE80211_DEV_TO_SUB_IF(ctx->dev);
803 local = sdata->local;
805 if (!local->ops->net_fill_forward_path)
809 switch (sdata->vif.type) {
810 case NL80211_IFTYPE_AP_VLAN:
811 sta = rcu_dereference(sdata->u.vlan.sta);
814 if (sdata->wdev.use_4addr)
816 if (is_multicast_ether_addr(ctx->daddr))
818 sta = sta_info_get_bss(sdata, ctx->daddr);
820 case NL80211_IFTYPE_AP:
821 if (is_multicast_ether_addr(ctx->daddr))
823 sta = sta_info_get(sdata, ctx->daddr);
825 case NL80211_IFTYPE_STATION:
826 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
827 sta = sta_info_get(sdata, ctx->daddr);
828 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
829 if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
836 sta = sta_info_get(sdata, sdata->u.mgd.bssid);
845 ret = drv_net_fill_forward_path(local, sdata, &sta->sta, ctx, path);
852 static const struct net_device_ops ieee80211_dataif_8023_ops = {
853 .ndo_open = ieee80211_open,
854 .ndo_stop = ieee80211_stop,
855 .ndo_uninit = ieee80211_uninit,
856 .ndo_start_xmit = ieee80211_subif_start_xmit_8023,
857 .ndo_set_rx_mode = ieee80211_set_multicast_list,
858 .ndo_set_mac_address = ieee80211_change_mac,
859 .ndo_select_queue = ieee80211_netdev_select_queue,
860 .ndo_get_stats64 = ieee80211_get_stats64,
861 .ndo_fill_forward_path = ieee80211_netdev_fill_forward_path,
864 static bool ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype)
867 /* P2P GO and client are mapped to AP/STATION types */
868 case NL80211_IFTYPE_AP:
869 case NL80211_IFTYPE_STATION:
876 static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata)
878 struct ieee80211_local *local = sdata->local;
881 flags = sdata->vif.offload_flags;
883 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) &&
884 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
885 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED;
887 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) &&
888 local->hw.wiphy->frag_threshold != (u32)-1)
889 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
892 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
894 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
897 if (ieee80211_hw_check(&local->hw, SUPPORTS_RX_DECAP_OFFLOAD) &&
898 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
899 flags |= IEEE80211_OFFLOAD_DECAP_ENABLED;
901 if (local->monitors &&
902 !ieee80211_hw_check(&local->hw, SUPPORTS_CONC_MON_RX_DECAP))
903 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
905 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
908 if (sdata->vif.offload_flags == flags)
911 sdata->vif.offload_flags = flags;
912 ieee80211_check_fast_rx_iface(sdata);
916 static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata)
918 struct ieee80211_local *local = sdata->local;
919 struct ieee80211_sub_if_data *bss = sdata;
922 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
926 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
929 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) ||
930 !ieee80211_iftype_supports_hdr_offload(bss->vif.type))
933 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED;
934 if (sdata->wdev.use_4addr &&
935 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR))
938 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops :
939 &ieee80211_dataif_ops;
942 static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata)
944 struct ieee80211_local *local = sdata->local;
945 struct ieee80211_sub_if_data *vsdata;
947 if (ieee80211_set_sdata_offload_flags(sdata)) {
948 drv_update_vif_offload(local, sdata);
949 ieee80211_set_vif_encap_ops(sdata);
952 list_for_each_entry(vsdata, &local->interfaces, list) {
953 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN ||
954 vsdata->bss != &sdata->u.ap)
957 ieee80211_set_vif_encap_ops(vsdata);
961 void ieee80211_recalc_offload(struct ieee80211_local *local)
963 struct ieee80211_sub_if_data *sdata;
965 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD))
968 mutex_lock(&local->iflist_mtx);
970 list_for_each_entry(sdata, &local->interfaces, list) {
971 if (!ieee80211_sdata_running(sdata))
974 ieee80211_recalc_sdata_offload(sdata);
977 mutex_unlock(&local->iflist_mtx);
980 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
983 struct ieee80211_local *local = sdata->local;
984 u32 flags = sdata->u.mntr.flags;
986 #define ADJUST(_f, _s) do { \
987 if (flags & MONITOR_FLAG_##_f) \
988 local->fif_##_s += offset; \
991 ADJUST(FCSFAIL, fcsfail);
992 ADJUST(PLCPFAIL, plcpfail);
993 ADJUST(CONTROL, control);
994 ADJUST(CONTROL, pspoll);
995 ADJUST(OTHER_BSS, other_bss);
1000 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
1002 struct ieee80211_local *local = sdata->local;
1005 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
1006 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
1007 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
1008 else if (local->hw.queues >= IEEE80211_NUM_ACS)
1009 sdata->vif.hw_queue[i] = i;
1011 sdata->vif.hw_queue[i] = 0;
1013 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
1016 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
1018 struct ieee80211_sub_if_data *sdata;
1021 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
1025 lockdep_assert_wiphy(local->hw.wiphy);
1027 if (local->monitor_sdata)
1030 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
1035 sdata->local = local;
1036 sdata->vif.type = NL80211_IFTYPE_MONITOR;
1037 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
1038 wiphy_name(local->hw.wiphy));
1039 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
1041 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1043 ieee80211_set_default_queues(sdata);
1045 ret = drv_add_interface(local, sdata);
1047 /* ok .. stupid driver, it asked for this! */
1052 set_bit(SDATA_STATE_RUNNING, &sdata->state);
1054 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
1060 mutex_lock(&local->iflist_mtx);
1061 rcu_assign_pointer(local->monitor_sdata, sdata);
1062 mutex_unlock(&local->iflist_mtx);
1064 mutex_lock(&local->mtx);
1065 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
1066 IEEE80211_CHANCTX_EXCLUSIVE);
1067 mutex_unlock(&local->mtx);
1069 mutex_lock(&local->iflist_mtx);
1070 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1071 mutex_unlock(&local->iflist_mtx);
1073 drv_remove_interface(local, sdata);
1078 skb_queue_head_init(&sdata->skb_queue);
1079 skb_queue_head_init(&sdata->status_queue);
1080 INIT_WORK(&sdata->work, ieee80211_iface_work);
1085 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
1087 struct ieee80211_sub_if_data *sdata;
1089 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
1093 lockdep_assert_wiphy(local->hw.wiphy);
1095 mutex_lock(&local->iflist_mtx);
1097 sdata = rcu_dereference_protected(local->monitor_sdata,
1098 lockdep_is_held(&local->iflist_mtx));
1100 mutex_unlock(&local->iflist_mtx);
1104 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1105 mutex_unlock(&local->iflist_mtx);
1109 mutex_lock(&local->mtx);
1110 ieee80211_vif_release_channel(sdata);
1111 mutex_unlock(&local->mtx);
1113 drv_remove_interface(local, sdata);
1119 * NOTE: Be very careful when changing this function, it must NOT return
1120 * an error on interface type changes that have been pre-checked, so most
1121 * checks should be in ieee80211_check_concurrent_iface.
1123 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
1125 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
1126 struct net_device *dev = wdev->netdev;
1127 struct ieee80211_local *local = sdata->local;
1130 u32 hw_reconf_flags = 0;
1132 switch (sdata->vif.type) {
1133 case NL80211_IFTYPE_AP_VLAN: {
1134 struct ieee80211_sub_if_data *master;
1139 mutex_lock(&local->mtx);
1140 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
1141 mutex_unlock(&local->mtx);
1143 master = container_of(sdata->bss,
1144 struct ieee80211_sub_if_data, u.ap);
1145 sdata->control_port_protocol =
1146 master->control_port_protocol;
1147 sdata->control_port_no_encrypt =
1148 master->control_port_no_encrypt;
1149 sdata->control_port_over_nl80211 =
1150 master->control_port_over_nl80211;
1151 sdata->control_port_no_preauth =
1152 master->control_port_no_preauth;
1153 sdata->vif.cab_queue = master->vif.cab_queue;
1154 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
1155 sizeof(sdata->vif.hw_queue));
1156 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
1158 mutex_lock(&local->key_mtx);
1159 sdata->crypto_tx_tailroom_needed_cnt +=
1160 master->crypto_tx_tailroom_needed_cnt;
1161 mutex_unlock(&local->key_mtx);
1165 case NL80211_IFTYPE_AP:
1166 sdata->bss = &sdata->u.ap;
1168 case NL80211_IFTYPE_MESH_POINT:
1169 case NL80211_IFTYPE_STATION:
1170 case NL80211_IFTYPE_MONITOR:
1171 case NL80211_IFTYPE_ADHOC:
1172 case NL80211_IFTYPE_P2P_DEVICE:
1173 case NL80211_IFTYPE_OCB:
1174 case NL80211_IFTYPE_NAN:
1175 /* no special treatment */
1177 case NL80211_IFTYPE_UNSPECIFIED:
1178 case NUM_NL80211_IFTYPES:
1179 case NL80211_IFTYPE_P2P_CLIENT:
1180 case NL80211_IFTYPE_P2P_GO:
1181 case NL80211_IFTYPE_WDS:
1187 if (local->open_count == 0) {
1188 res = drv_start(local);
1191 /* we're brought up, everything changes */
1192 hw_reconf_flags = ~0;
1193 ieee80211_led_radio(local, true);
1194 ieee80211_mod_tpt_led_trig(local,
1195 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1199 * Copy the hopefully now-present MAC address to
1200 * this interface, if it has the special null one.
1202 if (dev && is_zero_ether_addr(dev->dev_addr)) {
1203 eth_hw_addr_set(dev, local->hw.wiphy->perm_addr);
1204 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
1206 if (!is_valid_ether_addr(dev->dev_addr)) {
1207 res = -EADDRNOTAVAIL;
1212 switch (sdata->vif.type) {
1213 case NL80211_IFTYPE_AP_VLAN:
1214 /* no need to tell driver, but set carrier and chanctx */
1215 if (rtnl_dereference(sdata->bss->beacon)) {
1216 ieee80211_vif_vlan_copy_chanctx(sdata);
1217 netif_carrier_on(dev);
1218 ieee80211_set_vif_encap_ops(sdata);
1220 netif_carrier_off(dev);
1223 case NL80211_IFTYPE_MONITOR:
1224 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
1225 local->cooked_mntrs++;
1229 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
1230 res = drv_add_interface(local, sdata);
1233 } else if (local->monitors == 0 && local->open_count == 0) {
1234 res = ieee80211_add_virtual_monitor(local);
1239 /* must be before the call to ieee80211_configure_filter */
1241 if (local->monitors == 1) {
1242 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
1243 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
1246 ieee80211_adjust_monitor_flags(sdata, 1);
1247 ieee80211_configure_filter(local);
1248 ieee80211_recalc_offload(local);
1249 mutex_lock(&local->mtx);
1250 ieee80211_recalc_idle(local);
1251 mutex_unlock(&local->mtx);
1253 netif_carrier_on(dev);
1257 ieee80211_del_virtual_monitor(local);
1258 ieee80211_set_sdata_offload_flags(sdata);
1260 res = drv_add_interface(local, sdata);
1264 ieee80211_set_vif_encap_ops(sdata);
1265 res = ieee80211_check_queues(sdata,
1266 ieee80211_vif_type_p2p(&sdata->vif));
1268 goto err_del_interface;
1271 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1272 local->fif_pspoll++;
1273 local->fif_probe_req++;
1275 ieee80211_configure_filter(local);
1276 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1277 local->fif_probe_req++;
1280 if (sdata->vif.probe_req_reg)
1281 drv_config_iface_filter(local, sdata,
1285 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1286 sdata->vif.type != NL80211_IFTYPE_NAN)
1287 changed |= ieee80211_reset_erp_info(sdata);
1288 ieee80211_bss_info_change_notify(sdata, changed);
1290 switch (sdata->vif.type) {
1291 case NL80211_IFTYPE_STATION:
1292 case NL80211_IFTYPE_ADHOC:
1293 case NL80211_IFTYPE_AP:
1294 case NL80211_IFTYPE_MESH_POINT:
1295 case NL80211_IFTYPE_OCB:
1296 netif_carrier_off(dev);
1298 case NL80211_IFTYPE_P2P_DEVICE:
1299 case NL80211_IFTYPE_NAN:
1307 * Set default queue parameters so drivers don't
1308 * need to initialise the hardware if the hardware
1309 * doesn't start up with sane defaults.
1310 * Enable QoS for anything but station interfaces.
1312 ieee80211_set_wmm_default(sdata, true,
1313 sdata->vif.type != NL80211_IFTYPE_STATION);
1316 set_bit(SDATA_STATE_RUNNING, &sdata->state);
1318 switch (sdata->vif.type) {
1319 case NL80211_IFTYPE_P2P_DEVICE:
1320 rcu_assign_pointer(local->p2p_sdata, sdata);
1322 case NL80211_IFTYPE_MONITOR:
1323 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
1325 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
1332 * set_multicast_list will be invoked by the networking core
1333 * which will check whether any increments here were done in
1334 * error and sync them down to the hardware as filter flags.
1336 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
1337 atomic_inc(&local->iff_allmultis);
1340 local->open_count++;
1342 if (hw_reconf_flags)
1343 ieee80211_hw_config(local, hw_reconf_flags);
1345 ieee80211_recalc_ps(local);
1347 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1348 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1349 local->ops->wake_tx_queue) {
1350 /* XXX: for AP_VLAN, actually track AP queues */
1352 netif_tx_start_all_queues(dev);
1354 unsigned long flags;
1355 int n_acs = IEEE80211_NUM_ACS;
1358 if (local->hw.queues < IEEE80211_NUM_ACS)
1361 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1362 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
1363 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
1364 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
1365 for (ac = 0; ac < n_acs; ac++) {
1366 int ac_queue = sdata->vif.hw_queue[ac];
1368 if (local->queue_stop_reasons[ac_queue] == 0 &&
1369 skb_queue_empty(&local->pending[ac_queue]))
1370 netif_start_subqueue(dev, ac);
1373 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1378 drv_remove_interface(local, sdata);
1380 if (!local->open_count)
1384 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1385 mutex_lock(&local->mtx);
1386 list_del(&sdata->u.vlan.list);
1387 mutex_unlock(&local->mtx);
1389 /* might already be clear but that doesn't matter */
1390 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
1394 static void ieee80211_if_free(struct net_device *dev)
1396 free_percpu(dev->tstats);
1399 static void ieee80211_if_setup(struct net_device *dev)
1402 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1403 dev->netdev_ops = &ieee80211_dataif_ops;
1404 dev->needs_free_netdev = true;
1405 dev->priv_destructor = ieee80211_if_free;
1408 static void ieee80211_if_setup_no_queue(struct net_device *dev)
1410 ieee80211_if_setup(dev);
1411 dev->priv_flags |= IFF_NO_QUEUE;
1414 static void ieee80211_iface_process_skb(struct ieee80211_local *local,
1415 struct ieee80211_sub_if_data *sdata,
1416 struct sk_buff *skb)
1418 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1420 if (ieee80211_is_action(mgmt->frame_control) &&
1421 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1422 struct sta_info *sta;
1425 mutex_lock(&local->sta_mtx);
1426 sta = sta_info_get_bss(sdata, mgmt->sa);
1428 switch (mgmt->u.action.u.addba_req.action_code) {
1429 case WLAN_ACTION_ADDBA_REQ:
1430 ieee80211_process_addba_request(local, sta,
1433 case WLAN_ACTION_ADDBA_RESP:
1434 ieee80211_process_addba_resp(local, sta,
1437 case WLAN_ACTION_DELBA:
1438 ieee80211_process_delba(sdata, sta,
1446 mutex_unlock(&local->sta_mtx);
1447 } else if (ieee80211_is_action(mgmt->frame_control) &&
1448 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1449 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1450 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1451 struct ieee80211_rx_status *status;
1452 enum nl80211_band band;
1453 struct sta_info *sta;
1456 status = IEEE80211_SKB_RXCB(skb);
1457 band = status->band;
1458 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1460 mutex_lock(&local->sta_mtx);
1461 sta = sta_info_get_bss(sdata, mgmt->sa);
1464 ieee80211_vht_handle_opmode(sdata, sta, opmode,
1467 mutex_unlock(&local->sta_mtx);
1470 case WLAN_VHT_ACTION_GROUPID_MGMT:
1471 ieee80211_process_mu_groups(sdata, mgmt);
1477 } else if (ieee80211_is_action(mgmt->frame_control) &&
1478 mgmt->u.action.category == WLAN_CATEGORY_S1G) {
1479 switch (mgmt->u.action.u.s1g.action_code) {
1480 case WLAN_S1G_TWT_TEARDOWN:
1481 case WLAN_S1G_TWT_SETUP:
1482 ieee80211_s1g_rx_twt_action(sdata, skb);
1487 } else if (ieee80211_is_ext(mgmt->frame_control)) {
1488 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1489 ieee80211_sta_rx_queued_ext(sdata, skb);
1492 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1493 struct ieee80211_hdr *hdr = (void *)mgmt;
1494 struct sta_info *sta;
1497 * So the frame isn't mgmt, but frame_control
1498 * is at the right place anyway, of course, so
1499 * the if statement is correct.
1501 * Warn if we have other data frame types here,
1502 * they must not get here.
1504 WARN_ON(hdr->frame_control &
1505 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1506 WARN_ON(!(hdr->seq_ctrl &
1507 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1509 * This was a fragment of a frame, received while
1510 * a block-ack session was active. That cannot be
1511 * right, so terminate the session.
1513 mutex_lock(&local->sta_mtx);
1514 sta = sta_info_get_bss(sdata, mgmt->sa);
1516 u16 tid = ieee80211_get_tid(hdr);
1518 __ieee80211_stop_rx_ba_session(
1519 sta, tid, WLAN_BACK_RECIPIENT,
1520 WLAN_REASON_QSTA_REQUIRE_SETUP,
1523 mutex_unlock(&local->sta_mtx);
1524 } else switch (sdata->vif.type) {
1525 case NL80211_IFTYPE_STATION:
1526 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1528 case NL80211_IFTYPE_ADHOC:
1529 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1531 case NL80211_IFTYPE_MESH_POINT:
1532 if (!ieee80211_vif_is_mesh(&sdata->vif))
1534 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1537 WARN(1, "frame for unexpected interface type");
1542 static void ieee80211_iface_process_status(struct ieee80211_sub_if_data *sdata,
1543 struct sk_buff *skb)
1545 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1547 if (ieee80211_is_action(mgmt->frame_control) &&
1548 mgmt->u.action.category == WLAN_CATEGORY_S1G) {
1549 switch (mgmt->u.action.u.s1g.action_code) {
1550 case WLAN_S1G_TWT_TEARDOWN:
1551 case WLAN_S1G_TWT_SETUP:
1552 ieee80211_s1g_status_twt_action(sdata, skb);
1560 static void ieee80211_iface_work(struct work_struct *work)
1562 struct ieee80211_sub_if_data *sdata =
1563 container_of(work, struct ieee80211_sub_if_data, work);
1564 struct ieee80211_local *local = sdata->local;
1565 struct sk_buff *skb;
1567 if (!ieee80211_sdata_running(sdata))
1570 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1573 if (!ieee80211_can_run_worker(local))
1576 /* first process frames */
1577 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1578 kcov_remote_start_common(skb_get_kcov_handle(skb));
1580 if (skb->protocol == cpu_to_be16(ETH_P_TDLS))
1581 ieee80211_process_tdls_channel_switch(sdata, skb);
1583 ieee80211_iface_process_skb(local, sdata, skb);
1589 /* process status queue */
1590 while ((skb = skb_dequeue(&sdata->status_queue))) {
1591 kcov_remote_start_common(skb_get_kcov_handle(skb));
1593 ieee80211_iface_process_status(sdata, skb);
1599 /* then other type-dependent work */
1600 switch (sdata->vif.type) {
1601 case NL80211_IFTYPE_STATION:
1602 ieee80211_sta_work(sdata);
1604 case NL80211_IFTYPE_ADHOC:
1605 ieee80211_ibss_work(sdata);
1607 case NL80211_IFTYPE_MESH_POINT:
1608 if (!ieee80211_vif_is_mesh(&sdata->vif))
1610 ieee80211_mesh_work(sdata);
1612 case NL80211_IFTYPE_OCB:
1613 ieee80211_ocb_work(sdata);
1620 static void ieee80211_recalc_smps_work(struct work_struct *work)
1622 struct ieee80211_sub_if_data *sdata =
1623 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1625 ieee80211_recalc_smps(sdata);
1629 * Helper function to initialise an interface to a specific type.
1631 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1632 enum nl80211_iftype type)
1634 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1637 /* clear type-dependent union */
1638 memset(&sdata->u, 0, sizeof(sdata->u));
1640 /* and set some type-dependent values */
1641 sdata->vif.type = type;
1642 sdata->vif.p2p = false;
1643 sdata->wdev.iftype = type;
1645 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1646 sdata->control_port_no_encrypt = false;
1647 sdata->control_port_over_nl80211 = false;
1648 sdata->control_port_no_preauth = false;
1649 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1650 sdata->vif.bss_conf.idle = true;
1651 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */
1653 sdata->noack_map = 0;
1655 /* only monitor/p2p-device differ */
1657 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1658 sdata->dev->type = ARPHRD_ETHER;
1661 skb_queue_head_init(&sdata->skb_queue);
1662 skb_queue_head_init(&sdata->status_queue);
1663 INIT_WORK(&sdata->work, ieee80211_iface_work);
1664 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1665 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
1666 INIT_WORK(&sdata->color_change_finalize_work, ieee80211_color_change_finalize_work);
1667 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
1668 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
1671 case NL80211_IFTYPE_P2P_GO:
1672 type = NL80211_IFTYPE_AP;
1673 sdata->vif.type = type;
1674 sdata->vif.p2p = true;
1676 case NL80211_IFTYPE_AP:
1677 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1678 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1679 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1681 case NL80211_IFTYPE_P2P_CLIENT:
1682 type = NL80211_IFTYPE_STATION;
1683 sdata->vif.type = type;
1684 sdata->vif.p2p = true;
1686 case NL80211_IFTYPE_STATION:
1687 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1688 ieee80211_sta_setup_sdata(sdata);
1690 case NL80211_IFTYPE_OCB:
1691 sdata->vif.bss_conf.bssid = bssid_wildcard;
1692 ieee80211_ocb_setup_sdata(sdata);
1694 case NL80211_IFTYPE_ADHOC:
1695 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1696 ieee80211_ibss_setup_sdata(sdata);
1698 case NL80211_IFTYPE_MESH_POINT:
1699 if (ieee80211_vif_is_mesh(&sdata->vif))
1700 ieee80211_mesh_init_sdata(sdata);
1702 case NL80211_IFTYPE_MONITOR:
1703 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1704 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1705 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1706 MONITOR_FLAG_OTHER_BSS;
1708 case NL80211_IFTYPE_NAN:
1709 idr_init(&sdata->u.nan.function_inst_ids);
1710 spin_lock_init(&sdata->u.nan.func_lock);
1711 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1713 case NL80211_IFTYPE_AP_VLAN:
1714 case NL80211_IFTYPE_P2P_DEVICE:
1715 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1717 case NL80211_IFTYPE_UNSPECIFIED:
1718 case NL80211_IFTYPE_WDS:
1719 case NUM_NL80211_IFTYPES:
1724 ieee80211_debugfs_add_netdev(sdata);
1727 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1728 enum nl80211_iftype type)
1730 struct ieee80211_local *local = sdata->local;
1732 enum nl80211_iftype internal_type = type;
1737 if (!local->ops->change_interface)
1740 switch (sdata->vif.type) {
1741 case NL80211_IFTYPE_AP:
1742 if (!list_empty(&sdata->u.ap.vlans))
1745 case NL80211_IFTYPE_STATION:
1746 case NL80211_IFTYPE_ADHOC:
1747 case NL80211_IFTYPE_OCB:
1749 * Could maybe also all others here?
1750 * Just not sure how that interacts
1751 * with the RX/config path e.g. for
1760 case NL80211_IFTYPE_AP:
1761 case NL80211_IFTYPE_STATION:
1762 case NL80211_IFTYPE_ADHOC:
1763 case NL80211_IFTYPE_OCB:
1765 * Could probably support everything
1769 case NL80211_IFTYPE_P2P_CLIENT:
1771 internal_type = NL80211_IFTYPE_STATION;
1773 case NL80211_IFTYPE_P2P_GO:
1775 internal_type = NL80211_IFTYPE_AP;
1781 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1785 ieee80211_stop_vif_queues(local, sdata,
1786 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1789 ieee80211_do_stop(sdata, false);
1791 ieee80211_teardown_sdata(sdata);
1793 ieee80211_set_sdata_offload_flags(sdata);
1794 ret = drv_change_interface(local, sdata, internal_type, p2p);
1796 type = ieee80211_vif_type_p2p(&sdata->vif);
1799 * Ignore return value here, there's not much we can do since
1800 * the driver changed the interface type internally already.
1801 * The warnings will hopefully make driver authors fix it :-)
1803 ieee80211_check_queues(sdata, type);
1805 ieee80211_setup_sdata(sdata, type);
1806 ieee80211_set_vif_encap_ops(sdata);
1808 err = ieee80211_do_open(&sdata->wdev, false);
1809 WARN(err, "type change: do_open returned %d", err);
1811 ieee80211_wake_vif_queues(local, sdata,
1812 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1816 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1817 enum nl80211_iftype type)
1823 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1826 if (ieee80211_sdata_running(sdata)) {
1827 ret = ieee80211_runtime_change_iftype(sdata, type);
1831 /* Purge and reset type-dependent state. */
1832 ieee80211_teardown_sdata(sdata);
1833 ieee80211_setup_sdata(sdata, type);
1836 /* reset some values that shouldn't be kept across type changes */
1837 if (type == NL80211_IFTYPE_STATION)
1838 sdata->u.mgd.use_4addr = false;
1843 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1844 u8 *perm_addr, enum nl80211_iftype type)
1846 struct ieee80211_sub_if_data *sdata;
1847 u64 mask, start, addr, val, inc;
1849 u8 tmp_addr[ETH_ALEN];
1852 /* default ... something at least */
1853 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1855 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1856 local->hw.wiphy->n_addresses <= 1)
1859 mutex_lock(&local->iflist_mtx);
1862 case NL80211_IFTYPE_MONITOR:
1863 /* doesn't matter */
1865 case NL80211_IFTYPE_AP_VLAN:
1866 /* match up with an AP interface */
1867 list_for_each_entry(sdata, &local->interfaces, list) {
1868 if (sdata->vif.type != NL80211_IFTYPE_AP)
1870 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1873 /* keep default if no AP interface present */
1875 case NL80211_IFTYPE_P2P_CLIENT:
1876 case NL80211_IFTYPE_P2P_GO:
1877 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
1878 list_for_each_entry(sdata, &local->interfaces, list) {
1879 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1881 if (!ieee80211_sdata_running(sdata))
1883 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1889 /* assign a new address if possible -- try n_addresses first */
1890 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1893 list_for_each_entry(sdata, &local->interfaces, list) {
1894 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1903 local->hw.wiphy->addresses[i].addr,
1909 /* try mask if available */
1910 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1913 m = local->hw.wiphy->addr_mask;
1914 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1915 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1916 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1918 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1919 /* not a contiguous mask ... not handled now! */
1920 pr_info("not contiguous\n");
1925 * Pick address of existing interface in case user changed
1926 * MAC address manually, default to perm_addr.
1928 m = local->hw.wiphy->perm_addr;
1929 list_for_each_entry(sdata, &local->interfaces, list) {
1930 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1932 m = sdata->vif.addr;
1935 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1936 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1937 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1939 inc = 1ULL<<__ffs64(mask);
1940 val = (start & mask);
1941 addr = (start & ~mask) | (val & mask);
1945 tmp_addr[5] = addr >> 0*8;
1946 tmp_addr[4] = addr >> 1*8;
1947 tmp_addr[3] = addr >> 2*8;
1948 tmp_addr[2] = addr >> 3*8;
1949 tmp_addr[1] = addr >> 4*8;
1950 tmp_addr[0] = addr >> 5*8;
1954 list_for_each_entry(sdata, &local->interfaces, list) {
1955 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
1962 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1965 addr = (start & ~mask) | (val & mask);
1966 } while (addr != start);
1972 mutex_unlock(&local->iflist_mtx);
1975 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1976 unsigned char name_assign_type,
1977 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1978 struct vif_params *params)
1980 struct net_device *ndev = NULL;
1981 struct ieee80211_sub_if_data *sdata = NULL;
1982 struct txq_info *txqi;
1983 void (*if_setup)(struct net_device *dev);
1989 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
1990 struct wireless_dev *wdev;
1992 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1996 wdev = &sdata->wdev;
1999 strlcpy(sdata->name, name, IFNAMSIZ);
2000 ieee80211_assign_perm_addr(local, wdev->address, type);
2001 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
2003 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
2007 if (local->ops->wake_tx_queue &&
2008 type != NL80211_IFTYPE_AP_VLAN &&
2009 (type != NL80211_IFTYPE_MONITOR ||
2010 (params->flags & MONITOR_FLAG_ACTIVE)))
2011 txq_size += sizeof(struct txq_info) +
2012 local->hw.txq_data_size;
2014 if (local->ops->wake_tx_queue) {
2015 if_setup = ieee80211_if_setup_no_queue;
2017 if_setup = ieee80211_if_setup;
2018 if (local->hw.queues >= IEEE80211_NUM_ACS)
2019 txqs = IEEE80211_NUM_ACS;
2022 ndev = alloc_netdev_mqs(size + txq_size,
2023 name, name_assign_type,
2028 if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len)
2029 ndev->tx_queue_len = local->hw.wiphy->tx_queue_len;
2031 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
2033 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
2034 if (!ndev->tstats) {
2039 ndev->needed_headroom = local->tx_headroom +
2040 4*6 /* four MAC addresses */
2041 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
2043 + 8 /* rfc1042/bridge tunnel */
2044 - ETH_HLEN /* ethernet hard_header_len */
2045 + IEEE80211_ENCRYPT_HEADROOM;
2046 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
2048 ret = dev_alloc_name(ndev, ndev->name);
2050 ieee80211_if_free(ndev);
2055 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
2056 if (is_valid_ether_addr(params->macaddr))
2057 eth_hw_addr_set(ndev, params->macaddr);
2059 eth_hw_addr_set(ndev, ndev->perm_addr);
2060 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
2062 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
2063 sdata = netdev_priv(ndev);
2064 ndev->ieee80211_ptr = &sdata->wdev;
2065 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
2066 memcpy(sdata->name, ndev->name, IFNAMSIZ);
2069 txqi = netdev_priv(ndev) + size;
2070 ieee80211_txq_init(sdata, NULL, txqi, 0);
2076 /* initialise type-independent data */
2077 sdata->wdev.wiphy = local->hw.wiphy;
2078 sdata->local = local;
2080 ieee80211_init_frag_cache(&sdata->frags);
2082 INIT_LIST_HEAD(&sdata->key_list);
2084 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
2085 ieee80211_dfs_cac_timer_work);
2086 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
2087 ieee80211_delayed_tailroom_dec);
2089 for (i = 0; i < NUM_NL80211_BANDS; i++) {
2090 struct ieee80211_supported_band *sband;
2091 sband = local->hw.wiphy->bands[i];
2092 sdata->rc_rateidx_mask[i] =
2093 sband ? (1 << sband->n_bitrates) - 1 : 0;
2098 memcpy(sdata->rc_rateidx_mcs_mask[i],
2099 sband->ht_cap.mcs.rx_mask,
2100 sizeof(sdata->rc_rateidx_mcs_mask[i]));
2102 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
2103 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
2104 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
2106 memset(sdata->rc_rateidx_mcs_mask[i], 0,
2107 sizeof(sdata->rc_rateidx_mcs_mask[i]));
2108 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
2109 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
2113 for (i = 0; i < IEEE80211_NUM_ACS; i++)
2114 init_airtime_info(&sdata->airtime[i], &local->airtime[i]);
2116 ieee80211_set_default_queues(sdata);
2118 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2119 sdata->user_power_level = local->user_power_level;
2121 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2123 /* setup type-dependent data */
2124 ieee80211_setup_sdata(sdata, type);
2127 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
2128 if (type == NL80211_IFTYPE_STATION)
2129 sdata->u.mgd.use_4addr = params->use_4addr;
2131 ndev->features |= local->hw.netdev_features;
2132 ndev->hw_features |= ndev->features &
2133 MAC80211_SUPPORTED_FEATURES_TX;
2135 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
2137 /* MTU range is normally 256 - 2304, where the upper limit is
2138 * the maximum MSDU size. Monitor interfaces send and receive
2139 * MPDU and A-MSDU frames which may be much larger so we do
2140 * not impose an upper limit in that case.
2142 ndev->min_mtu = 256;
2143 if (type == NL80211_IFTYPE_MONITOR)
2146 ndev->max_mtu = local->hw.max_mtu;
2148 ret = cfg80211_register_netdevice(ndev);
2155 mutex_lock(&local->iflist_mtx);
2156 list_add_tail_rcu(&sdata->list, &local->interfaces);
2157 mutex_unlock(&local->iflist_mtx);
2160 *new_wdev = &sdata->wdev;
2165 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
2169 mutex_lock(&sdata->local->iflist_mtx);
2170 list_del_rcu(&sdata->list);
2171 mutex_unlock(&sdata->local->iflist_mtx);
2174 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
2178 cfg80211_unregister_wdev(&sdata->wdev);
2181 ieee80211_teardown_sdata(sdata);
2186 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
2188 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
2190 ieee80211_do_stop(sdata, true);
2193 void ieee80211_remove_interfaces(struct ieee80211_local *local)
2195 struct ieee80211_sub_if_data *sdata, *tmp;
2196 LIST_HEAD(unreg_list);
2197 LIST_HEAD(wdev_list);
2201 /* Before destroying the interfaces, make sure they're all stopped so
2202 * that the hardware is stopped. Otherwise, the driver might still be
2203 * iterating the interfaces during the shutdown, e.g. from a worker
2204 * or from RX processing or similar, and if it does so (using atomic
2205 * iteration) while we're manipulating the list, the iteration will
2208 * After this, the hardware should be stopped and the driver should
2209 * have stopped all of its activities, so that we can do RCU-unaware
2210 * manipulations of the interface list below.
2212 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2214 WARN(local->open_count, "%s: open count remains %d\n",
2215 wiphy_name(local->hw.wiphy), local->open_count);
2217 ieee80211_txq_teardown_flows(local);
2219 mutex_lock(&local->iflist_mtx);
2220 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
2221 list_del(&sdata->list);
2224 unregister_netdevice_queue(sdata->dev, &unreg_list);
2226 list_add(&sdata->list, &wdev_list);
2228 mutex_unlock(&local->iflist_mtx);
2230 unregister_netdevice_many(&unreg_list);
2232 wiphy_lock(local->hw.wiphy);
2233 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
2234 list_del(&sdata->list);
2235 cfg80211_unregister_wdev(&sdata->wdev);
2238 wiphy_unlock(local->hw.wiphy);
2241 static int netdev_notify(struct notifier_block *nb,
2242 unsigned long state, void *ptr)
2244 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2245 struct ieee80211_sub_if_data *sdata;
2247 if (state != NETDEV_CHANGENAME)
2250 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
2253 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
2256 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2257 memcpy(sdata->name, dev->name, IFNAMSIZ);
2258 ieee80211_debugfs_rename_netdev(sdata);
2263 static struct notifier_block mac80211_netdev_notifier = {
2264 .notifier_call = netdev_notify,
2267 int ieee80211_iface_init(void)
2269 return register_netdevice_notifier(&mac80211_netdev_notifier);
2272 void ieee80211_iface_exit(void)
2274 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2277 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2279 if (sdata->vif.type == NL80211_IFTYPE_AP)
2280 atomic_inc(&sdata->u.ap.num_mcast_sta);
2281 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2282 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2285 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2287 if (sdata->vif.type == NL80211_IFTYPE_AP)
2288 atomic_dec(&sdata->u.ap.num_mcast_sta);
2289 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2290 atomic_dec(&sdata->u.vlan.num_mcast_sta);