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 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
381 synchronize_rcu(); /* flush _ieee80211_wake_txqs() */
383 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
385 ieee80211_scan_cancel(local);
388 * Stop TX on this interface first.
391 netif_tx_stop_all_queues(sdata->dev);
393 ieee80211_roc_purge(local, sdata);
395 switch (sdata->vif.type) {
396 case NL80211_IFTYPE_STATION:
397 ieee80211_mgd_stop(sdata);
399 case NL80211_IFTYPE_ADHOC:
400 ieee80211_ibss_stop(sdata);
402 case NL80211_IFTYPE_MONITOR:
403 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
405 list_del_rcu(&sdata->u.mntr.list);
412 * Remove all stations associated with this interface.
414 * This must be done before calling ops->remove_interface()
415 * because otherwise we can later invoke ops->sta_notify()
416 * whenever the STAs are removed, and that invalidates driver
417 * assumptions about always getting a vif pointer that is valid
418 * (because if we remove a STA after ops->remove_interface()
419 * the driver will have removed the vif info already!)
421 * For AP_VLANs stations may exist since there's nothing else that
422 * would have removed them, but in other modes there shouldn't
425 flushed = sta_info_flush(sdata);
426 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN && flushed > 0);
428 /* don't count this interface for allmulti while it is down */
429 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
430 atomic_dec(&local->iff_allmultis);
432 if (sdata->vif.type == NL80211_IFTYPE_AP) {
434 local->fif_probe_req--;
435 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
436 local->fif_probe_req--;
440 netif_addr_lock_bh(sdata->dev);
441 spin_lock_bh(&local->filter_lock);
442 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
443 sdata->dev->addr_len);
444 spin_unlock_bh(&local->filter_lock);
445 netif_addr_unlock_bh(sdata->dev);
448 del_timer_sync(&local->dynamic_ps_timer);
449 cancel_work_sync(&local->dynamic_ps_enable_work);
451 cancel_work_sync(&sdata->recalc_smps);
453 mutex_lock(&local->mtx);
454 sdata->vif.csa_active = false;
455 if (sdata->vif.type == NL80211_IFTYPE_STATION)
456 sdata->u.mgd.csa_waiting_bcn = false;
457 if (sdata->csa_block_tx) {
458 ieee80211_wake_vif_queues(local, sdata,
459 IEEE80211_QUEUE_STOP_REASON_CSA);
460 sdata->csa_block_tx = false;
462 mutex_unlock(&local->mtx);
465 cancel_work_sync(&sdata->csa_finalize_work);
466 cancel_work_sync(&sdata->color_change_finalize_work);
468 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
470 if (sdata->wdev.cac_started) {
471 chandef = sdata->vif.bss_conf.chandef;
472 WARN_ON(local->suspended);
473 mutex_lock(&local->mtx);
474 ieee80211_vif_release_channel(sdata);
475 mutex_unlock(&local->mtx);
476 cfg80211_cac_event(sdata->dev, &chandef,
477 NL80211_RADAR_CAC_ABORTED,
481 if (sdata->vif.type == NL80211_IFTYPE_AP) {
482 WARN_ON(!list_empty(&sdata->u.ap.vlans));
483 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
484 /* remove all packets in parent bc_buf pointing to this dev */
485 ps = &sdata->bss->ps;
487 spin_lock_irqsave(&ps->bc_buf.lock, flags);
488 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
489 if (skb->dev == sdata->dev) {
490 __skb_unlink(skb, &ps->bc_buf);
491 local->total_ps_buffered--;
492 ieee80211_free_txskb(&local->hw, skb);
495 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
501 switch (sdata->vif.type) {
502 case NL80211_IFTYPE_AP_VLAN:
503 mutex_lock(&local->mtx);
504 list_del(&sdata->u.vlan.list);
505 mutex_unlock(&local->mtx);
506 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
507 /* see comment in the default case below */
508 ieee80211_free_keys(sdata, true);
509 /* no need to tell driver */
511 case NL80211_IFTYPE_MONITOR:
512 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
513 local->cooked_mntrs--;
518 if (local->monitors == 0) {
519 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
520 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
523 ieee80211_adjust_monitor_flags(sdata, -1);
525 case NL80211_IFTYPE_NAN:
526 /* clean all the functions */
527 spin_lock_bh(&sdata->u.nan.func_lock);
529 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
530 idr_remove(&sdata->u.nan.function_inst_ids, i);
531 cfg80211_free_nan_func(func);
533 idr_destroy(&sdata->u.nan.function_inst_ids);
535 spin_unlock_bh(&sdata->u.nan.func_lock);
537 case NL80211_IFTYPE_P2P_DEVICE:
538 /* relies on synchronize_rcu() below */
539 RCU_INIT_POINTER(local->p2p_sdata, NULL);
542 cancel_work_sync(&sdata->work);
544 * When we get here, the interface is marked down.
545 * Free the remaining keys, if there are any
546 * (which can happen in AP mode if userspace sets
547 * keys before the interface is operating)
549 * Force the key freeing to always synchronize_net()
550 * to wait for the RX path in case it is using this
551 * interface enqueuing frames at this very time on
554 ieee80211_free_keys(sdata, true);
555 skb_queue_purge(&sdata->skb_queue);
556 skb_queue_purge(&sdata->status_queue);
559 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
560 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
561 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
562 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
563 if (info->control.vif == &sdata->vif) {
564 __skb_unlink(skb, &local->pending[i]);
565 ieee80211_free_txskb(&local->hw, skb);
569 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
571 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
572 ieee80211_txq_remove_vlan(local, sdata);
576 if (local->open_count == 0)
577 ieee80211_clear_tx_pending(local);
579 sdata->vif.bss_conf.beacon_int = 0;
582 * If the interface goes down while suspended, presumably because
583 * the device was unplugged and that happens before our resume,
584 * then the driver is already unconfigured and the remainder of
585 * this function isn't needed.
586 * XXX: what about WoWLAN? If the device has software state, e.g.
587 * memory allocated, it might expect teardown commands from
590 if (local->suspended) {
591 WARN_ON(local->wowlan);
592 WARN_ON(rcu_access_pointer(local->monitor_sdata));
596 switch (sdata->vif.type) {
597 case NL80211_IFTYPE_AP_VLAN:
599 case NL80211_IFTYPE_MONITOR:
600 if (local->monitors == 0)
601 ieee80211_del_virtual_monitor(local);
603 mutex_lock(&local->mtx);
604 ieee80211_recalc_idle(local);
605 mutex_unlock(&local->mtx);
607 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
613 drv_remove_interface(local, sdata);
616 ieee80211_recalc_ps(local);
619 flush_delayed_work(&local->scan_work);
621 if (local->open_count == 0) {
622 ieee80211_stop_device(local);
624 /* no reconfiguring after stop! */
628 /* do after stop to avoid reconfiguring when we stop anyway */
629 ieee80211_configure_filter(local);
630 ieee80211_hw_config(local, hw_reconf_flags);
632 if (local->monitors == local->open_count)
633 ieee80211_add_virtual_monitor(local);
636 static void ieee80211_stop_mbssid(struct ieee80211_sub_if_data *sdata)
638 struct ieee80211_sub_if_data *tx_sdata, *non_tx_sdata, *tmp_sdata;
639 struct ieee80211_vif *tx_vif = sdata->vif.mbssid_tx_vif;
644 tx_sdata = vif_to_sdata(tx_vif);
645 sdata->vif.mbssid_tx_vif = NULL;
647 list_for_each_entry_safe(non_tx_sdata, tmp_sdata,
648 &tx_sdata->local->interfaces, list) {
649 if (non_tx_sdata != sdata && non_tx_sdata != tx_sdata &&
650 non_tx_sdata->vif.mbssid_tx_vif == tx_vif &&
651 ieee80211_sdata_running(non_tx_sdata)) {
652 non_tx_sdata->vif.mbssid_tx_vif = NULL;
653 dev_close(non_tx_sdata->wdev.netdev);
657 if (sdata != tx_sdata && ieee80211_sdata_running(tx_sdata)) {
658 tx_sdata->vif.mbssid_tx_vif = NULL;
659 dev_close(tx_sdata->wdev.netdev);
663 static int ieee80211_stop(struct net_device *dev)
665 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
667 /* close dependent VLAN and MBSSID interfaces before locking wiphy */
668 if (sdata->vif.type == NL80211_IFTYPE_AP) {
669 struct ieee80211_sub_if_data *vlan, *tmpsdata;
671 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
673 dev_close(vlan->dev);
675 ieee80211_stop_mbssid(sdata);
678 wiphy_lock(sdata->local->hw.wiphy);
679 ieee80211_do_stop(sdata, true);
680 wiphy_unlock(sdata->local->hw.wiphy);
685 static void ieee80211_set_multicast_list(struct net_device *dev)
687 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
688 struct ieee80211_local *local = sdata->local;
689 int allmulti, sdata_allmulti;
691 allmulti = !!(dev->flags & IFF_ALLMULTI);
692 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
694 if (allmulti != sdata_allmulti) {
695 if (dev->flags & IFF_ALLMULTI)
696 atomic_inc(&local->iff_allmultis);
698 atomic_dec(&local->iff_allmultis);
699 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
702 spin_lock_bh(&local->filter_lock);
703 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
704 spin_unlock_bh(&local->filter_lock);
705 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
709 * Called when the netdev is removed or, by the code below, before
710 * the interface type changes.
712 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
714 /* free extra data */
715 ieee80211_free_keys(sdata, false);
717 ieee80211_debugfs_remove_netdev(sdata);
719 ieee80211_destroy_frag_cache(&sdata->frags);
721 if (ieee80211_vif_is_mesh(&sdata->vif))
722 ieee80211_mesh_teardown_sdata(sdata);
725 static void ieee80211_uninit(struct net_device *dev)
727 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
730 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
732 struct net_device *sb_dev)
734 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
738 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
740 dev_fetch_sw_netstats(stats, dev->tstats);
743 static const struct net_device_ops ieee80211_dataif_ops = {
744 .ndo_open = ieee80211_open,
745 .ndo_stop = ieee80211_stop,
746 .ndo_uninit = ieee80211_uninit,
747 .ndo_start_xmit = ieee80211_subif_start_xmit,
748 .ndo_set_rx_mode = ieee80211_set_multicast_list,
749 .ndo_set_mac_address = ieee80211_change_mac,
750 .ndo_select_queue = ieee80211_netdev_select_queue,
751 .ndo_get_stats64 = ieee80211_get_stats64,
754 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
756 struct net_device *sb_dev)
758 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
759 struct ieee80211_local *local = sdata->local;
760 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
761 struct ieee80211_hdr *hdr;
764 if (local->hw.queues < IEEE80211_NUM_ACS)
767 /* reset flags and info before parsing radiotap header */
768 memset(info, 0, sizeof(*info));
770 if (!ieee80211_parse_tx_radiotap(skb, dev))
771 return 0; /* doesn't matter, frame will be dropped */
773 len_rthdr = ieee80211_get_radiotap_len(skb->data);
774 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
775 if (skb->len < len_rthdr + 2 ||
776 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control))
777 return 0; /* doesn't matter, frame will be dropped */
779 return ieee80211_select_queue_80211(sdata, skb, hdr);
782 static const struct net_device_ops ieee80211_monitorif_ops = {
783 .ndo_open = ieee80211_open,
784 .ndo_stop = ieee80211_stop,
785 .ndo_uninit = ieee80211_uninit,
786 .ndo_start_xmit = ieee80211_monitor_start_xmit,
787 .ndo_set_rx_mode = ieee80211_set_multicast_list,
788 .ndo_set_mac_address = ieee80211_change_mac,
789 .ndo_select_queue = ieee80211_monitor_select_queue,
790 .ndo_get_stats64 = ieee80211_get_stats64,
793 static int ieee80211_netdev_fill_forward_path(struct net_device_path_ctx *ctx,
794 struct net_device_path *path)
796 struct ieee80211_sub_if_data *sdata;
797 struct ieee80211_local *local;
798 struct sta_info *sta;
801 sdata = IEEE80211_DEV_TO_SUB_IF(ctx->dev);
802 local = sdata->local;
804 if (!local->ops->net_fill_forward_path)
808 switch (sdata->vif.type) {
809 case NL80211_IFTYPE_AP_VLAN:
810 sta = rcu_dereference(sdata->u.vlan.sta);
813 if (sdata->wdev.use_4addr)
815 if (is_multicast_ether_addr(ctx->daddr))
817 sta = sta_info_get_bss(sdata, ctx->daddr);
819 case NL80211_IFTYPE_AP:
820 if (is_multicast_ether_addr(ctx->daddr))
822 sta = sta_info_get(sdata, ctx->daddr);
824 case NL80211_IFTYPE_STATION:
825 if (sdata->wdev.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) {
826 sta = sta_info_get(sdata, ctx->daddr);
827 if (sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {
828 if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
835 sta = sta_info_get(sdata, sdata->u.mgd.bssid);
844 ret = drv_net_fill_forward_path(local, sdata, &sta->sta, ctx, path);
851 static const struct net_device_ops ieee80211_dataif_8023_ops = {
852 .ndo_open = ieee80211_open,
853 .ndo_stop = ieee80211_stop,
854 .ndo_uninit = ieee80211_uninit,
855 .ndo_start_xmit = ieee80211_subif_start_xmit_8023,
856 .ndo_set_rx_mode = ieee80211_set_multicast_list,
857 .ndo_set_mac_address = ieee80211_change_mac,
858 .ndo_select_queue = ieee80211_netdev_select_queue,
859 .ndo_get_stats64 = ieee80211_get_stats64,
860 .ndo_fill_forward_path = ieee80211_netdev_fill_forward_path,
863 static bool ieee80211_iftype_supports_hdr_offload(enum nl80211_iftype iftype)
866 /* P2P GO and client are mapped to AP/STATION types */
867 case NL80211_IFTYPE_AP:
868 case NL80211_IFTYPE_STATION:
875 static bool ieee80211_set_sdata_offload_flags(struct ieee80211_sub_if_data *sdata)
877 struct ieee80211_local *local = sdata->local;
880 flags = sdata->vif.offload_flags;
882 if (ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) &&
883 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
884 flags |= IEEE80211_OFFLOAD_ENCAP_ENABLED;
886 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) &&
887 local->hw.wiphy->frag_threshold != (u32)-1)
888 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
891 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
893 flags &= ~IEEE80211_OFFLOAD_ENCAP_ENABLED;
896 if (ieee80211_hw_check(&local->hw, SUPPORTS_RX_DECAP_OFFLOAD) &&
897 ieee80211_iftype_supports_hdr_offload(sdata->vif.type)) {
898 flags |= IEEE80211_OFFLOAD_DECAP_ENABLED;
900 if (local->monitors &&
901 !ieee80211_hw_check(&local->hw, SUPPORTS_CONC_MON_RX_DECAP))
902 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
904 flags &= ~IEEE80211_OFFLOAD_DECAP_ENABLED;
907 if (sdata->vif.offload_flags == flags)
910 sdata->vif.offload_flags = flags;
911 ieee80211_check_fast_rx_iface(sdata);
915 static void ieee80211_set_vif_encap_ops(struct ieee80211_sub_if_data *sdata)
917 struct ieee80211_local *local = sdata->local;
918 struct ieee80211_sub_if_data *bss = sdata;
921 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
925 bss = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
928 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD) ||
929 !ieee80211_iftype_supports_hdr_offload(bss->vif.type))
932 enabled = bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_ENABLED;
933 if (sdata->wdev.use_4addr &&
934 !(bss->vif.offload_flags & IEEE80211_OFFLOAD_ENCAP_4ADDR))
937 sdata->dev->netdev_ops = enabled ? &ieee80211_dataif_8023_ops :
938 &ieee80211_dataif_ops;
941 static void ieee80211_recalc_sdata_offload(struct ieee80211_sub_if_data *sdata)
943 struct ieee80211_local *local = sdata->local;
944 struct ieee80211_sub_if_data *vsdata;
946 if (ieee80211_set_sdata_offload_flags(sdata)) {
947 drv_update_vif_offload(local, sdata);
948 ieee80211_set_vif_encap_ops(sdata);
951 list_for_each_entry(vsdata, &local->interfaces, list) {
952 if (vsdata->vif.type != NL80211_IFTYPE_AP_VLAN ||
953 vsdata->bss != &sdata->u.ap)
956 ieee80211_set_vif_encap_ops(vsdata);
960 void ieee80211_recalc_offload(struct ieee80211_local *local)
962 struct ieee80211_sub_if_data *sdata;
964 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_ENCAP_OFFLOAD))
967 mutex_lock(&local->iflist_mtx);
969 list_for_each_entry(sdata, &local->interfaces, list) {
970 if (!ieee80211_sdata_running(sdata))
973 ieee80211_recalc_sdata_offload(sdata);
976 mutex_unlock(&local->iflist_mtx);
979 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
982 struct ieee80211_local *local = sdata->local;
983 u32 flags = sdata->u.mntr.flags;
985 #define ADJUST(_f, _s) do { \
986 if (flags & MONITOR_FLAG_##_f) \
987 local->fif_##_s += offset; \
990 ADJUST(FCSFAIL, fcsfail);
991 ADJUST(PLCPFAIL, plcpfail);
992 ADJUST(CONTROL, control);
993 ADJUST(CONTROL, pspoll);
994 ADJUST(OTHER_BSS, other_bss);
999 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
1001 struct ieee80211_local *local = sdata->local;
1004 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
1005 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
1006 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
1007 else if (local->hw.queues >= IEEE80211_NUM_ACS)
1008 sdata->vif.hw_queue[i] = i;
1010 sdata->vif.hw_queue[i] = 0;
1012 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
1015 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
1017 struct ieee80211_sub_if_data *sdata;
1020 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
1024 lockdep_assert_wiphy(local->hw.wiphy);
1026 if (local->monitor_sdata)
1029 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
1034 sdata->local = local;
1035 sdata->vif.type = NL80211_IFTYPE_MONITOR;
1036 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
1037 wiphy_name(local->hw.wiphy));
1038 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
1040 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1042 ieee80211_set_default_queues(sdata);
1044 ret = drv_add_interface(local, sdata);
1046 /* ok .. stupid driver, it asked for this! */
1051 set_bit(SDATA_STATE_RUNNING, &sdata->state);
1053 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
1059 mutex_lock(&local->iflist_mtx);
1060 rcu_assign_pointer(local->monitor_sdata, sdata);
1061 mutex_unlock(&local->iflist_mtx);
1063 mutex_lock(&local->mtx);
1064 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
1065 IEEE80211_CHANCTX_EXCLUSIVE);
1066 mutex_unlock(&local->mtx);
1068 mutex_lock(&local->iflist_mtx);
1069 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1070 mutex_unlock(&local->iflist_mtx);
1072 drv_remove_interface(local, sdata);
1077 skb_queue_head_init(&sdata->skb_queue);
1078 skb_queue_head_init(&sdata->status_queue);
1079 INIT_WORK(&sdata->work, ieee80211_iface_work);
1084 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
1086 struct ieee80211_sub_if_data *sdata;
1088 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
1092 lockdep_assert_wiphy(local->hw.wiphy);
1094 mutex_lock(&local->iflist_mtx);
1096 sdata = rcu_dereference_protected(local->monitor_sdata,
1097 lockdep_is_held(&local->iflist_mtx));
1099 mutex_unlock(&local->iflist_mtx);
1103 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1104 mutex_unlock(&local->iflist_mtx);
1108 mutex_lock(&local->mtx);
1109 ieee80211_vif_release_channel(sdata);
1110 mutex_unlock(&local->mtx);
1112 drv_remove_interface(local, sdata);
1118 * NOTE: Be very careful when changing this function, it must NOT return
1119 * an error on interface type changes that have been pre-checked, so most
1120 * checks should be in ieee80211_check_concurrent_iface.
1122 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
1124 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
1125 struct net_device *dev = wdev->netdev;
1126 struct ieee80211_local *local = sdata->local;
1129 u32 hw_reconf_flags = 0;
1131 switch (sdata->vif.type) {
1132 case NL80211_IFTYPE_AP_VLAN: {
1133 struct ieee80211_sub_if_data *master;
1138 mutex_lock(&local->mtx);
1139 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
1140 mutex_unlock(&local->mtx);
1142 master = container_of(sdata->bss,
1143 struct ieee80211_sub_if_data, u.ap);
1144 sdata->control_port_protocol =
1145 master->control_port_protocol;
1146 sdata->control_port_no_encrypt =
1147 master->control_port_no_encrypt;
1148 sdata->control_port_over_nl80211 =
1149 master->control_port_over_nl80211;
1150 sdata->control_port_no_preauth =
1151 master->control_port_no_preauth;
1152 sdata->vif.cab_queue = master->vif.cab_queue;
1153 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
1154 sizeof(sdata->vif.hw_queue));
1155 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
1157 mutex_lock(&local->key_mtx);
1158 sdata->crypto_tx_tailroom_needed_cnt +=
1159 master->crypto_tx_tailroom_needed_cnt;
1160 mutex_unlock(&local->key_mtx);
1164 case NL80211_IFTYPE_AP:
1165 sdata->bss = &sdata->u.ap;
1167 case NL80211_IFTYPE_MESH_POINT:
1168 case NL80211_IFTYPE_STATION:
1169 case NL80211_IFTYPE_MONITOR:
1170 case NL80211_IFTYPE_ADHOC:
1171 case NL80211_IFTYPE_P2P_DEVICE:
1172 case NL80211_IFTYPE_OCB:
1173 case NL80211_IFTYPE_NAN:
1174 /* no special treatment */
1176 case NL80211_IFTYPE_UNSPECIFIED:
1177 case NUM_NL80211_IFTYPES:
1178 case NL80211_IFTYPE_P2P_CLIENT:
1179 case NL80211_IFTYPE_P2P_GO:
1180 case NL80211_IFTYPE_WDS:
1186 if (local->open_count == 0) {
1187 res = drv_start(local);
1190 /* we're brought up, everything changes */
1191 hw_reconf_flags = ~0;
1192 ieee80211_led_radio(local, true);
1193 ieee80211_mod_tpt_led_trig(local,
1194 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1198 * Copy the hopefully now-present MAC address to
1199 * this interface, if it has the special null one.
1201 if (dev && is_zero_ether_addr(dev->dev_addr)) {
1202 eth_hw_addr_set(dev, local->hw.wiphy->perm_addr);
1203 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
1205 if (!is_valid_ether_addr(dev->dev_addr)) {
1206 res = -EADDRNOTAVAIL;
1211 switch (sdata->vif.type) {
1212 case NL80211_IFTYPE_AP_VLAN:
1213 /* no need to tell driver, but set carrier and chanctx */
1214 if (rtnl_dereference(sdata->bss->beacon)) {
1215 ieee80211_vif_vlan_copy_chanctx(sdata);
1216 netif_carrier_on(dev);
1217 ieee80211_set_vif_encap_ops(sdata);
1219 netif_carrier_off(dev);
1222 case NL80211_IFTYPE_MONITOR:
1223 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
1224 local->cooked_mntrs++;
1228 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
1229 res = drv_add_interface(local, sdata);
1232 } else if (local->monitors == 0 && local->open_count == 0) {
1233 res = ieee80211_add_virtual_monitor(local);
1238 /* must be before the call to ieee80211_configure_filter */
1240 if (local->monitors == 1) {
1241 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
1242 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
1245 ieee80211_adjust_monitor_flags(sdata, 1);
1246 ieee80211_configure_filter(local);
1247 ieee80211_recalc_offload(local);
1248 mutex_lock(&local->mtx);
1249 ieee80211_recalc_idle(local);
1250 mutex_unlock(&local->mtx);
1252 netif_carrier_on(dev);
1256 ieee80211_del_virtual_monitor(local);
1257 ieee80211_set_sdata_offload_flags(sdata);
1259 res = drv_add_interface(local, sdata);
1263 ieee80211_set_vif_encap_ops(sdata);
1264 res = ieee80211_check_queues(sdata,
1265 ieee80211_vif_type_p2p(&sdata->vif));
1267 goto err_del_interface;
1270 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1271 local->fif_pspoll++;
1272 local->fif_probe_req++;
1274 ieee80211_configure_filter(local);
1275 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
1276 local->fif_probe_req++;
1279 if (sdata->vif.probe_req_reg)
1280 drv_config_iface_filter(local, sdata,
1284 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1285 sdata->vif.type != NL80211_IFTYPE_NAN)
1286 changed |= ieee80211_reset_erp_info(sdata);
1287 ieee80211_bss_info_change_notify(sdata, changed);
1289 switch (sdata->vif.type) {
1290 case NL80211_IFTYPE_STATION:
1291 case NL80211_IFTYPE_ADHOC:
1292 case NL80211_IFTYPE_AP:
1293 case NL80211_IFTYPE_MESH_POINT:
1294 case NL80211_IFTYPE_OCB:
1295 netif_carrier_off(dev);
1297 case NL80211_IFTYPE_P2P_DEVICE:
1298 case NL80211_IFTYPE_NAN:
1306 * Set default queue parameters so drivers don't
1307 * need to initialise the hardware if the hardware
1308 * doesn't start up with sane defaults.
1309 * Enable QoS for anything but station interfaces.
1311 ieee80211_set_wmm_default(sdata, true,
1312 sdata->vif.type != NL80211_IFTYPE_STATION);
1315 set_bit(SDATA_STATE_RUNNING, &sdata->state);
1317 switch (sdata->vif.type) {
1318 case NL80211_IFTYPE_P2P_DEVICE:
1319 rcu_assign_pointer(local->p2p_sdata, sdata);
1321 case NL80211_IFTYPE_MONITOR:
1322 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
1324 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
1331 * set_multicast_list will be invoked by the networking core
1332 * which will check whether any increments here were done in
1333 * error and sync them down to the hardware as filter flags.
1335 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
1336 atomic_inc(&local->iff_allmultis);
1339 local->open_count++;
1341 if (hw_reconf_flags)
1342 ieee80211_hw_config(local, hw_reconf_flags);
1344 ieee80211_recalc_ps(local);
1346 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1347 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1348 local->ops->wake_tx_queue) {
1349 /* XXX: for AP_VLAN, actually track AP queues */
1351 netif_tx_start_all_queues(dev);
1353 unsigned long flags;
1354 int n_acs = IEEE80211_NUM_ACS;
1357 if (local->hw.queues < IEEE80211_NUM_ACS)
1360 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1361 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
1362 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
1363 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
1364 for (ac = 0; ac < n_acs; ac++) {
1365 int ac_queue = sdata->vif.hw_queue[ac];
1367 if (local->queue_stop_reasons[ac_queue] == 0 &&
1368 skb_queue_empty(&local->pending[ac_queue]))
1369 netif_start_subqueue(dev, ac);
1372 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1377 drv_remove_interface(local, sdata);
1379 if (!local->open_count)
1383 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
1384 mutex_lock(&local->mtx);
1385 list_del(&sdata->u.vlan.list);
1386 mutex_unlock(&local->mtx);
1388 /* might already be clear but that doesn't matter */
1389 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
1393 static void ieee80211_if_free(struct net_device *dev)
1395 free_percpu(dev->tstats);
1398 static void ieee80211_if_setup(struct net_device *dev)
1401 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1402 dev->netdev_ops = &ieee80211_dataif_ops;
1403 dev->needs_free_netdev = true;
1404 dev->priv_destructor = ieee80211_if_free;
1407 static void ieee80211_if_setup_no_queue(struct net_device *dev)
1409 ieee80211_if_setup(dev);
1410 dev->priv_flags |= IFF_NO_QUEUE;
1413 static void ieee80211_iface_process_skb(struct ieee80211_local *local,
1414 struct ieee80211_sub_if_data *sdata,
1415 struct sk_buff *skb)
1417 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1419 if (ieee80211_is_action(mgmt->frame_control) &&
1420 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1421 struct sta_info *sta;
1424 mutex_lock(&local->sta_mtx);
1425 sta = sta_info_get_bss(sdata, mgmt->sa);
1427 switch (mgmt->u.action.u.addba_req.action_code) {
1428 case WLAN_ACTION_ADDBA_REQ:
1429 ieee80211_process_addba_request(local, sta,
1432 case WLAN_ACTION_ADDBA_RESP:
1433 ieee80211_process_addba_resp(local, sta,
1436 case WLAN_ACTION_DELBA:
1437 ieee80211_process_delba(sdata, sta,
1445 mutex_unlock(&local->sta_mtx);
1446 } else if (ieee80211_is_action(mgmt->frame_control) &&
1447 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1448 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1449 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1450 struct ieee80211_rx_status *status;
1451 enum nl80211_band band;
1452 struct sta_info *sta;
1455 status = IEEE80211_SKB_RXCB(skb);
1456 band = status->band;
1457 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1459 mutex_lock(&local->sta_mtx);
1460 sta = sta_info_get_bss(sdata, mgmt->sa);
1463 ieee80211_vht_handle_opmode(sdata, sta, opmode,
1466 mutex_unlock(&local->sta_mtx);
1469 case WLAN_VHT_ACTION_GROUPID_MGMT:
1470 ieee80211_process_mu_groups(sdata, mgmt);
1476 } else if (ieee80211_is_action(mgmt->frame_control) &&
1477 mgmt->u.action.category == WLAN_CATEGORY_S1G) {
1478 switch (mgmt->u.action.u.s1g.action_code) {
1479 case WLAN_S1G_TWT_TEARDOWN:
1480 case WLAN_S1G_TWT_SETUP:
1481 ieee80211_s1g_rx_twt_action(sdata, skb);
1486 } else if (ieee80211_is_ext(mgmt->frame_control)) {
1487 if (sdata->vif.type == NL80211_IFTYPE_STATION)
1488 ieee80211_sta_rx_queued_ext(sdata, skb);
1491 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1492 struct ieee80211_hdr *hdr = (void *)mgmt;
1493 struct sta_info *sta;
1496 * So the frame isn't mgmt, but frame_control
1497 * is at the right place anyway, of course, so
1498 * the if statement is correct.
1500 * Warn if we have other data frame types here,
1501 * they must not get here.
1503 WARN_ON(hdr->frame_control &
1504 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1505 WARN_ON(!(hdr->seq_ctrl &
1506 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1508 * This was a fragment of a frame, received while
1509 * a block-ack session was active. That cannot be
1510 * right, so terminate the session.
1512 mutex_lock(&local->sta_mtx);
1513 sta = sta_info_get_bss(sdata, mgmt->sa);
1515 u16 tid = ieee80211_get_tid(hdr);
1517 __ieee80211_stop_rx_ba_session(
1518 sta, tid, WLAN_BACK_RECIPIENT,
1519 WLAN_REASON_QSTA_REQUIRE_SETUP,
1522 mutex_unlock(&local->sta_mtx);
1523 } else switch (sdata->vif.type) {
1524 case NL80211_IFTYPE_STATION:
1525 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1527 case NL80211_IFTYPE_ADHOC:
1528 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1530 case NL80211_IFTYPE_MESH_POINT:
1531 if (!ieee80211_vif_is_mesh(&sdata->vif))
1533 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1536 WARN(1, "frame for unexpected interface type");
1541 static void ieee80211_iface_process_status(struct ieee80211_sub_if_data *sdata,
1542 struct sk_buff *skb)
1544 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1546 if (ieee80211_is_action(mgmt->frame_control) &&
1547 mgmt->u.action.category == WLAN_CATEGORY_S1G) {
1548 switch (mgmt->u.action.u.s1g.action_code) {
1549 case WLAN_S1G_TWT_TEARDOWN:
1550 case WLAN_S1G_TWT_SETUP:
1551 ieee80211_s1g_status_twt_action(sdata, skb);
1559 static void ieee80211_iface_work(struct work_struct *work)
1561 struct ieee80211_sub_if_data *sdata =
1562 container_of(work, struct ieee80211_sub_if_data, work);
1563 struct ieee80211_local *local = sdata->local;
1564 struct sk_buff *skb;
1566 if (!ieee80211_sdata_running(sdata))
1569 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1572 if (!ieee80211_can_run_worker(local))
1575 /* first process frames */
1576 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1577 kcov_remote_start_common(skb_get_kcov_handle(skb));
1579 if (skb->protocol == cpu_to_be16(ETH_P_TDLS))
1580 ieee80211_process_tdls_channel_switch(sdata, skb);
1582 ieee80211_iface_process_skb(local, sdata, skb);
1588 /* process status queue */
1589 while ((skb = skb_dequeue(&sdata->status_queue))) {
1590 kcov_remote_start_common(skb_get_kcov_handle(skb));
1592 ieee80211_iface_process_status(sdata, skb);
1598 /* then other type-dependent work */
1599 switch (sdata->vif.type) {
1600 case NL80211_IFTYPE_STATION:
1601 ieee80211_sta_work(sdata);
1603 case NL80211_IFTYPE_ADHOC:
1604 ieee80211_ibss_work(sdata);
1606 case NL80211_IFTYPE_MESH_POINT:
1607 if (!ieee80211_vif_is_mesh(&sdata->vif))
1609 ieee80211_mesh_work(sdata);
1611 case NL80211_IFTYPE_OCB:
1612 ieee80211_ocb_work(sdata);
1619 static void ieee80211_recalc_smps_work(struct work_struct *work)
1621 struct ieee80211_sub_if_data *sdata =
1622 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1624 ieee80211_recalc_smps(sdata);
1628 * Helper function to initialise an interface to a specific type.
1630 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1631 enum nl80211_iftype type)
1633 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1636 /* clear type-dependent union */
1637 memset(&sdata->u, 0, sizeof(sdata->u));
1639 /* and set some type-dependent values */
1640 sdata->vif.type = type;
1641 sdata->vif.p2p = false;
1642 sdata->wdev.iftype = type;
1644 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1645 sdata->control_port_no_encrypt = false;
1646 sdata->control_port_over_nl80211 = false;
1647 sdata->control_port_no_preauth = false;
1648 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1649 sdata->vif.bss_conf.idle = true;
1650 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */
1652 sdata->noack_map = 0;
1654 /* only monitor/p2p-device differ */
1656 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1657 sdata->dev->type = ARPHRD_ETHER;
1660 skb_queue_head_init(&sdata->skb_queue);
1661 skb_queue_head_init(&sdata->status_queue);
1662 INIT_WORK(&sdata->work, ieee80211_iface_work);
1663 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1664 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
1665 INIT_WORK(&sdata->color_change_finalize_work, ieee80211_color_change_finalize_work);
1666 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
1667 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
1670 case NL80211_IFTYPE_P2P_GO:
1671 type = NL80211_IFTYPE_AP;
1672 sdata->vif.type = type;
1673 sdata->vif.p2p = true;
1675 case NL80211_IFTYPE_AP:
1676 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1677 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1678 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1680 case NL80211_IFTYPE_P2P_CLIENT:
1681 type = NL80211_IFTYPE_STATION;
1682 sdata->vif.type = type;
1683 sdata->vif.p2p = true;
1685 case NL80211_IFTYPE_STATION:
1686 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1687 ieee80211_sta_setup_sdata(sdata);
1689 case NL80211_IFTYPE_OCB:
1690 sdata->vif.bss_conf.bssid = bssid_wildcard;
1691 ieee80211_ocb_setup_sdata(sdata);
1693 case NL80211_IFTYPE_ADHOC:
1694 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1695 ieee80211_ibss_setup_sdata(sdata);
1697 case NL80211_IFTYPE_MESH_POINT:
1698 if (ieee80211_vif_is_mesh(&sdata->vif))
1699 ieee80211_mesh_init_sdata(sdata);
1701 case NL80211_IFTYPE_MONITOR:
1702 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1703 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1704 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1705 MONITOR_FLAG_OTHER_BSS;
1707 case NL80211_IFTYPE_NAN:
1708 idr_init(&sdata->u.nan.function_inst_ids);
1709 spin_lock_init(&sdata->u.nan.func_lock);
1710 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1712 case NL80211_IFTYPE_AP_VLAN:
1713 case NL80211_IFTYPE_P2P_DEVICE:
1714 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1716 case NL80211_IFTYPE_UNSPECIFIED:
1717 case NL80211_IFTYPE_WDS:
1718 case NUM_NL80211_IFTYPES:
1723 ieee80211_debugfs_add_netdev(sdata);
1726 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1727 enum nl80211_iftype type)
1729 struct ieee80211_local *local = sdata->local;
1731 enum nl80211_iftype internal_type = type;
1736 if (!local->ops->change_interface)
1739 switch (sdata->vif.type) {
1740 case NL80211_IFTYPE_AP:
1741 if (!list_empty(&sdata->u.ap.vlans))
1744 case NL80211_IFTYPE_STATION:
1745 case NL80211_IFTYPE_ADHOC:
1746 case NL80211_IFTYPE_OCB:
1748 * Could maybe also all others here?
1749 * Just not sure how that interacts
1750 * with the RX/config path e.g. for
1759 case NL80211_IFTYPE_AP:
1760 case NL80211_IFTYPE_STATION:
1761 case NL80211_IFTYPE_ADHOC:
1762 case NL80211_IFTYPE_OCB:
1764 * Could probably support everything
1768 case NL80211_IFTYPE_P2P_CLIENT:
1770 internal_type = NL80211_IFTYPE_STATION;
1772 case NL80211_IFTYPE_P2P_GO:
1774 internal_type = NL80211_IFTYPE_AP;
1780 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1784 ieee80211_stop_vif_queues(local, sdata,
1785 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1788 ieee80211_do_stop(sdata, false);
1790 ieee80211_teardown_sdata(sdata);
1792 ieee80211_set_sdata_offload_flags(sdata);
1793 ret = drv_change_interface(local, sdata, internal_type, p2p);
1795 type = ieee80211_vif_type_p2p(&sdata->vif);
1798 * Ignore return value here, there's not much we can do since
1799 * the driver changed the interface type internally already.
1800 * The warnings will hopefully make driver authors fix it :-)
1802 ieee80211_check_queues(sdata, type);
1804 ieee80211_setup_sdata(sdata, type);
1805 ieee80211_set_vif_encap_ops(sdata);
1807 err = ieee80211_do_open(&sdata->wdev, false);
1808 WARN(err, "type change: do_open returned %d", err);
1810 ieee80211_wake_vif_queues(local, sdata,
1811 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1815 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1816 enum nl80211_iftype type)
1822 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1825 if (ieee80211_sdata_running(sdata)) {
1826 ret = ieee80211_runtime_change_iftype(sdata, type);
1830 /* Purge and reset type-dependent state. */
1831 ieee80211_teardown_sdata(sdata);
1832 ieee80211_setup_sdata(sdata, type);
1835 /* reset some values that shouldn't be kept across type changes */
1836 if (type == NL80211_IFTYPE_STATION)
1837 sdata->u.mgd.use_4addr = false;
1842 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1843 u8 *perm_addr, enum nl80211_iftype type)
1845 struct ieee80211_sub_if_data *sdata;
1846 u64 mask, start, addr, val, inc;
1848 u8 tmp_addr[ETH_ALEN];
1851 /* default ... something at least */
1852 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1854 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1855 local->hw.wiphy->n_addresses <= 1)
1858 mutex_lock(&local->iflist_mtx);
1861 case NL80211_IFTYPE_MONITOR:
1862 /* doesn't matter */
1864 case NL80211_IFTYPE_AP_VLAN:
1865 /* match up with an AP interface */
1866 list_for_each_entry(sdata, &local->interfaces, list) {
1867 if (sdata->vif.type != NL80211_IFTYPE_AP)
1869 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1872 /* keep default if no AP interface present */
1874 case NL80211_IFTYPE_P2P_CLIENT:
1875 case NL80211_IFTYPE_P2P_GO:
1876 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
1877 list_for_each_entry(sdata, &local->interfaces, list) {
1878 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1880 if (!ieee80211_sdata_running(sdata))
1882 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1888 /* assign a new address if possible -- try n_addresses first */
1889 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1892 list_for_each_entry(sdata, &local->interfaces, list) {
1893 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1902 local->hw.wiphy->addresses[i].addr,
1908 /* try mask if available */
1909 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1912 m = local->hw.wiphy->addr_mask;
1913 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1914 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1915 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1917 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1918 /* not a contiguous mask ... not handled now! */
1919 pr_info("not contiguous\n");
1924 * Pick address of existing interface in case user changed
1925 * MAC address manually, default to perm_addr.
1927 m = local->hw.wiphy->perm_addr;
1928 list_for_each_entry(sdata, &local->interfaces, list) {
1929 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1931 m = sdata->vif.addr;
1934 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1935 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1936 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1938 inc = 1ULL<<__ffs64(mask);
1939 val = (start & mask);
1940 addr = (start & ~mask) | (val & mask);
1944 tmp_addr[5] = addr >> 0*8;
1945 tmp_addr[4] = addr >> 1*8;
1946 tmp_addr[3] = addr >> 2*8;
1947 tmp_addr[2] = addr >> 3*8;
1948 tmp_addr[1] = addr >> 4*8;
1949 tmp_addr[0] = addr >> 5*8;
1953 list_for_each_entry(sdata, &local->interfaces, list) {
1954 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
1961 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1964 addr = (start & ~mask) | (val & mask);
1965 } while (addr != start);
1971 mutex_unlock(&local->iflist_mtx);
1974 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1975 unsigned char name_assign_type,
1976 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1977 struct vif_params *params)
1979 struct net_device *ndev = NULL;
1980 struct ieee80211_sub_if_data *sdata = NULL;
1981 struct txq_info *txqi;
1982 void (*if_setup)(struct net_device *dev);
1988 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
1989 struct wireless_dev *wdev;
1991 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1995 wdev = &sdata->wdev;
1998 strlcpy(sdata->name, name, IFNAMSIZ);
1999 ieee80211_assign_perm_addr(local, wdev->address, type);
2000 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
2002 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
2006 if (local->ops->wake_tx_queue &&
2007 type != NL80211_IFTYPE_AP_VLAN &&
2008 (type != NL80211_IFTYPE_MONITOR ||
2009 (params->flags & MONITOR_FLAG_ACTIVE)))
2010 txq_size += sizeof(struct txq_info) +
2011 local->hw.txq_data_size;
2013 if (local->ops->wake_tx_queue) {
2014 if_setup = ieee80211_if_setup_no_queue;
2016 if_setup = ieee80211_if_setup;
2017 if (local->hw.queues >= IEEE80211_NUM_ACS)
2018 txqs = IEEE80211_NUM_ACS;
2021 ndev = alloc_netdev_mqs(size + txq_size,
2022 name, name_assign_type,
2027 if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len)
2028 ndev->tx_queue_len = local->hw.wiphy->tx_queue_len;
2030 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
2032 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
2033 if (!ndev->tstats) {
2038 ndev->needed_headroom = local->tx_headroom +
2039 4*6 /* four MAC addresses */
2040 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
2042 + 8 /* rfc1042/bridge tunnel */
2043 - ETH_HLEN /* ethernet hard_header_len */
2044 + IEEE80211_ENCRYPT_HEADROOM;
2045 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
2047 ret = dev_alloc_name(ndev, ndev->name);
2049 ieee80211_if_free(ndev);
2054 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
2055 if (is_valid_ether_addr(params->macaddr))
2056 eth_hw_addr_set(ndev, params->macaddr);
2058 eth_hw_addr_set(ndev, ndev->perm_addr);
2059 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
2061 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
2062 sdata = netdev_priv(ndev);
2063 ndev->ieee80211_ptr = &sdata->wdev;
2064 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
2065 memcpy(sdata->name, ndev->name, IFNAMSIZ);
2068 txqi = netdev_priv(ndev) + size;
2069 ieee80211_txq_init(sdata, NULL, txqi, 0);
2075 /* initialise type-independent data */
2076 sdata->wdev.wiphy = local->hw.wiphy;
2077 sdata->local = local;
2079 ieee80211_init_frag_cache(&sdata->frags);
2081 INIT_LIST_HEAD(&sdata->key_list);
2083 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
2084 ieee80211_dfs_cac_timer_work);
2085 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
2086 ieee80211_delayed_tailroom_dec);
2088 for (i = 0; i < NUM_NL80211_BANDS; i++) {
2089 struct ieee80211_supported_band *sband;
2090 sband = local->hw.wiphy->bands[i];
2091 sdata->rc_rateidx_mask[i] =
2092 sband ? (1 << sband->n_bitrates) - 1 : 0;
2097 memcpy(sdata->rc_rateidx_mcs_mask[i],
2098 sband->ht_cap.mcs.rx_mask,
2099 sizeof(sdata->rc_rateidx_mcs_mask[i]));
2101 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
2102 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
2103 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
2105 memset(sdata->rc_rateidx_mcs_mask[i], 0,
2106 sizeof(sdata->rc_rateidx_mcs_mask[i]));
2107 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
2108 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
2112 for (i = 0; i < IEEE80211_NUM_ACS; i++)
2113 init_airtime_info(&sdata->airtime[i], &local->airtime[i]);
2115 ieee80211_set_default_queues(sdata);
2117 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
2118 sdata->user_power_level = local->user_power_level;
2120 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
2122 /* setup type-dependent data */
2123 ieee80211_setup_sdata(sdata, type);
2126 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
2127 if (type == NL80211_IFTYPE_STATION)
2128 sdata->u.mgd.use_4addr = params->use_4addr;
2130 ndev->features |= local->hw.netdev_features;
2131 ndev->hw_features |= ndev->features &
2132 MAC80211_SUPPORTED_FEATURES_TX;
2134 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
2136 /* MTU range is normally 256 - 2304, where the upper limit is
2137 * the maximum MSDU size. Monitor interfaces send and receive
2138 * MPDU and A-MSDU frames which may be much larger so we do
2139 * not impose an upper limit in that case.
2141 ndev->min_mtu = 256;
2142 if (type == NL80211_IFTYPE_MONITOR)
2145 ndev->max_mtu = local->hw.max_mtu;
2147 ret = cfg80211_register_netdevice(ndev);
2154 mutex_lock(&local->iflist_mtx);
2155 list_add_tail_rcu(&sdata->list, &local->interfaces);
2156 mutex_unlock(&local->iflist_mtx);
2159 *new_wdev = &sdata->wdev;
2164 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
2168 mutex_lock(&sdata->local->iflist_mtx);
2169 list_del_rcu(&sdata->list);
2170 mutex_unlock(&sdata->local->iflist_mtx);
2173 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
2177 cfg80211_unregister_wdev(&sdata->wdev);
2180 ieee80211_teardown_sdata(sdata);
2185 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
2187 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
2189 ieee80211_do_stop(sdata, true);
2192 void ieee80211_remove_interfaces(struct ieee80211_local *local)
2194 struct ieee80211_sub_if_data *sdata, *tmp;
2195 LIST_HEAD(unreg_list);
2196 LIST_HEAD(wdev_list);
2200 /* Before destroying the interfaces, make sure they're all stopped so
2201 * that the hardware is stopped. Otherwise, the driver might still be
2202 * iterating the interfaces during the shutdown, e.g. from a worker
2203 * or from RX processing or similar, and if it does so (using atomic
2204 * iteration) while we're manipulating the list, the iteration will
2207 * After this, the hardware should be stopped and the driver should
2208 * have stopped all of its activities, so that we can do RCU-unaware
2209 * manipulations of the interface list below.
2211 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2213 WARN(local->open_count, "%s: open count remains %d\n",
2214 wiphy_name(local->hw.wiphy), local->open_count);
2216 ieee80211_txq_teardown_flows(local);
2218 mutex_lock(&local->iflist_mtx);
2219 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
2220 list_del(&sdata->list);
2223 unregister_netdevice_queue(sdata->dev, &unreg_list);
2225 list_add(&sdata->list, &wdev_list);
2227 mutex_unlock(&local->iflist_mtx);
2229 unregister_netdevice_many(&unreg_list);
2231 wiphy_lock(local->hw.wiphy);
2232 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
2233 list_del(&sdata->list);
2234 cfg80211_unregister_wdev(&sdata->wdev);
2237 wiphy_unlock(local->hw.wiphy);
2240 static int netdev_notify(struct notifier_block *nb,
2241 unsigned long state, void *ptr)
2243 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2244 struct ieee80211_sub_if_data *sdata;
2246 if (state != NETDEV_CHANGENAME)
2249 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
2252 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
2255 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2256 memcpy(sdata->name, dev->name, IFNAMSIZ);
2257 ieee80211_debugfs_rename_netdev(sdata);
2262 static struct notifier_block mac80211_netdev_notifier = {
2263 .notifier_call = netdev_notify,
2266 int ieee80211_iface_init(void)
2268 return register_netdevice_notifier(&mac80211_netdev_notifier);
2271 void ieee80211_iface_exit(void)
2273 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2276 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2278 if (sdata->vif.type == NL80211_IFTYPE_AP)
2279 atomic_inc(&sdata->u.ap.num_mcast_sta);
2280 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2281 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2284 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2286 if (sdata->vif.type == NL80211_IFTYPE_AP)
2287 atomic_dec(&sdata->u.ap.num_mcast_sta);
2288 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2289 atomic_dec(&sdata->u.vlan.num_mcast_sta);