2 * Interface handling (except master interface)
4 * Copyright 2002-2005, Instant802 Networks, Inc.
5 * Copyright 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
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 <net/mac80211.h>
19 #include <net/ieee80211_radiotap.h>
20 #include "ieee80211_i.h"
22 #include "debugfs_netdev.h"
25 #include "driver-ops.h"
30 * DOC: Interface list locking
32 * The interface list in each struct ieee80211_local is protected
35 * (1) modifications may only be done under the RTNL
36 * (2) modifications and readers are protected against each other by
38 * (3) modifications are done in an RCU manner so atomic readers
39 * can traverse the list in RCU-safe blocks.
41 * As a consequence, reads (traversals) of the list can be protected
42 * by either the RTNL, the iflist_mtx or RCU.
46 static u32 ieee80211_idle_off(struct ieee80211_local *local,
49 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
52 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
53 return IEEE80211_CONF_CHANGE_IDLE;
56 static u32 ieee80211_idle_on(struct ieee80211_local *local)
58 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
61 drv_flush(local, false);
63 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
64 return IEEE80211_CONF_CHANGE_IDLE;
67 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
69 struct ieee80211_sub_if_data *sdata;
71 bool working = false, scanning = false;
72 unsigned int led_trig_start = 0, led_trig_stop = 0;
73 struct ieee80211_roc_work *roc;
75 #ifdef CONFIG_PROVE_LOCKING
76 WARN_ON(debug_locks && !lockdep_rtnl_is_held() &&
77 !lockdep_is_held(&local->iflist_mtx));
79 lockdep_assert_held(&local->mtx);
81 list_for_each_entry(sdata, &local->interfaces, list) {
82 if (!ieee80211_sdata_running(sdata)) {
83 sdata->vif.bss_conf.idle = true;
87 sdata->old_idle = sdata->vif.bss_conf.idle;
89 /* do not count disabled managed interfaces */
90 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
91 !sdata->u.mgd.associated &&
92 !sdata->u.mgd.auth_data &&
93 !sdata->u.mgd.assoc_data) {
94 sdata->vif.bss_conf.idle = true;
97 /* do not count unused IBSS interfaces */
98 if (sdata->vif.type == NL80211_IFTYPE_ADHOC &&
99 !sdata->u.ibss.ssid_len) {
100 sdata->vif.bss_conf.idle = true;
104 if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE)
107 /* count everything else */
108 sdata->vif.bss_conf.idle = false;
112 if (!local->ops->remain_on_channel) {
113 list_for_each_entry(roc, &local->roc_list, list) {
115 roc->sdata->vif.bss_conf.idle = false;
119 sdata = rcu_dereference_protected(local->scan_sdata,
120 lockdep_is_held(&local->mtx));
121 if (sdata && !(local->hw.flags & IEEE80211_HW_SCAN_WHILE_IDLE)) {
123 sdata->vif.bss_conf.idle = false;
126 list_for_each_entry(sdata, &local->interfaces, list) {
127 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
128 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
129 sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE)
131 if (sdata->old_idle == sdata->vif.bss_conf.idle)
133 if (!ieee80211_sdata_running(sdata))
135 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE);
138 if (working || scanning)
139 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
141 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
144 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
146 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
148 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
151 return ieee80211_idle_off(local, "working");
153 return ieee80211_idle_off(local, "scanning");
155 return ieee80211_idle_on(local);
157 return ieee80211_idle_off(local, "in use");
162 void ieee80211_recalc_idle(struct ieee80211_local *local)
166 mutex_lock(&local->iflist_mtx);
167 chg = __ieee80211_recalc_idle(local);
168 mutex_unlock(&local->iflist_mtx);
170 ieee80211_hw_config(local, chg);
173 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
176 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
178 meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0;
180 /* FIX: what would be proper limits for MTU?
181 * This interface uses 802.3 frames. */
183 new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
191 static int ieee80211_change_mac(struct net_device *dev, void *addr)
193 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
194 struct sockaddr *sa = addr;
197 if (ieee80211_sdata_running(sdata))
200 ret = eth_mac_addr(dev, sa);
203 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
208 static inline int identical_mac_addr_allowed(int type1, int type2)
210 return type1 == NL80211_IFTYPE_MONITOR ||
211 type2 == NL80211_IFTYPE_MONITOR ||
212 type1 == NL80211_IFTYPE_P2P_DEVICE ||
213 type2 == NL80211_IFTYPE_P2P_DEVICE ||
214 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
215 (type1 == NL80211_IFTYPE_WDS &&
216 (type2 == NL80211_IFTYPE_WDS ||
217 type2 == NL80211_IFTYPE_AP)) ||
218 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
219 (type1 == NL80211_IFTYPE_AP_VLAN &&
220 (type2 == NL80211_IFTYPE_AP ||
221 type2 == NL80211_IFTYPE_AP_VLAN));
224 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
225 enum nl80211_iftype iftype)
227 struct ieee80211_local *local = sdata->local;
228 struct ieee80211_sub_if_data *nsdata;
232 /* we hold the RTNL here so can safely walk the list */
233 list_for_each_entry(nsdata, &local->interfaces, list) {
234 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
236 * Allow only a single IBSS interface to be up at any
237 * time. This is restricted because beacon distribution
238 * cannot work properly if both are in the same IBSS.
240 * To remove this restriction we'd have to disallow them
241 * from setting the same SSID on different IBSS interfaces
242 * belonging to the same hardware. Then, however, we're
243 * faced with having to adopt two different TSF timers...
245 if (iftype == NL80211_IFTYPE_ADHOC &&
246 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
250 * The remaining checks are only performed for interfaces
251 * with the same MAC address.
253 if (!ether_addr_equal(sdata->vif.addr,
258 * check whether it may have the same address
260 if (!identical_mac_addr_allowed(iftype,
265 * can only add VLANs to enabled APs
267 if (iftype == NL80211_IFTYPE_AP_VLAN &&
268 nsdata->vif.type == NL80211_IFTYPE_AP)
269 sdata->bss = &nsdata->u.ap;
276 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata)
278 int n_queues = sdata->local->hw.queues;
281 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
282 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
283 IEEE80211_INVAL_HW_QUEUE))
285 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
290 if ((sdata->vif.type != NL80211_IFTYPE_AP) ||
291 !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
292 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
296 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
299 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
305 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
308 struct ieee80211_local *local = sdata->local;
309 u32 flags = sdata->u.mntr_flags;
311 #define ADJUST(_f, _s) do { \
312 if (flags & MONITOR_FLAG_##_f) \
313 local->fif_##_s += offset; \
316 ADJUST(FCSFAIL, fcsfail);
317 ADJUST(PLCPFAIL, plcpfail);
318 ADJUST(CONTROL, control);
319 ADJUST(CONTROL, pspoll);
320 ADJUST(OTHER_BSS, other_bss);
325 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
327 struct ieee80211_local *local = sdata->local;
330 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
331 if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
332 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
333 else if (local->hw.queues >= IEEE80211_NUM_ACS)
334 sdata->vif.hw_queue[i] = i;
336 sdata->vif.hw_queue[i] = 0;
338 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
341 static int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
343 struct ieee80211_sub_if_data *sdata;
346 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
349 mutex_lock(&local->iflist_mtx);
351 if (local->monitor_sdata)
354 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
361 sdata->local = local;
362 sdata->vif.type = NL80211_IFTYPE_MONITOR;
363 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
364 wiphy_name(local->hw.wiphy));
366 ieee80211_set_default_queues(sdata);
368 ret = drv_add_interface(local, sdata);
370 /* ok .. stupid driver, it asked for this! */
375 ret = ieee80211_check_queues(sdata);
381 rcu_assign_pointer(local->monitor_sdata, sdata);
383 mutex_unlock(&local->iflist_mtx);
387 static void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
389 struct ieee80211_sub_if_data *sdata;
391 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
394 mutex_lock(&local->iflist_mtx);
396 sdata = rcu_dereference_protected(local->monitor_sdata,
397 lockdep_is_held(&local->iflist_mtx));
401 rcu_assign_pointer(local->monitor_sdata, NULL);
404 drv_remove_interface(local, sdata);
408 mutex_unlock(&local->iflist_mtx);
412 * NOTE: Be very careful when changing this function, it must NOT return
413 * an error on interface type changes that have been pre-checked, so most
414 * checks should be in ieee80211_check_concurrent_iface.
416 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
418 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
419 struct net_device *dev = wdev->netdev;
420 struct ieee80211_local *local = sdata->local;
421 struct sta_info *sta;
424 u32 hw_reconf_flags = 0;
426 switch (sdata->vif.type) {
427 case NL80211_IFTYPE_WDS:
428 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
431 case NL80211_IFTYPE_AP_VLAN: {
432 struct ieee80211_sub_if_data *master;
437 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
439 master = container_of(sdata->bss,
440 struct ieee80211_sub_if_data, u.ap);
441 sdata->control_port_protocol =
442 master->control_port_protocol;
443 sdata->control_port_no_encrypt =
444 master->control_port_no_encrypt;
447 case NL80211_IFTYPE_AP:
448 sdata->bss = &sdata->u.ap;
450 case NL80211_IFTYPE_MESH_POINT:
451 case NL80211_IFTYPE_STATION:
452 case NL80211_IFTYPE_MONITOR:
453 case NL80211_IFTYPE_ADHOC:
454 case NL80211_IFTYPE_P2P_DEVICE:
455 /* no special treatment */
457 case NL80211_IFTYPE_UNSPECIFIED:
458 case NUM_NL80211_IFTYPES:
459 case NL80211_IFTYPE_P2P_CLIENT:
460 case NL80211_IFTYPE_P2P_GO:
466 if (local->open_count == 0) {
467 res = drv_start(local);
470 if (local->ops->napi_poll)
471 napi_enable(&local->napi);
472 /* we're brought up, everything changes */
473 hw_reconf_flags = ~0;
474 ieee80211_led_radio(local, true);
475 ieee80211_mod_tpt_led_trig(local,
476 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
480 * Copy the hopefully now-present MAC address to
481 * this interface, if it has the special null one.
483 if (dev && is_zero_ether_addr(dev->dev_addr)) {
484 memcpy(dev->dev_addr,
485 local->hw.wiphy->perm_addr,
487 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
489 if (!is_valid_ether_addr(dev->dev_addr)) {
490 res = -EADDRNOTAVAIL;
495 switch (sdata->vif.type) {
496 case NL80211_IFTYPE_AP_VLAN:
497 /* no need to tell driver, but set carrier */
498 if (rtnl_dereference(sdata->bss->beacon))
499 netif_carrier_on(dev);
501 netif_carrier_off(dev);
503 case NL80211_IFTYPE_MONITOR:
504 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
505 local->cooked_mntrs++;
509 if (local->monitors == 0 && local->open_count == 0) {
510 res = ieee80211_add_virtual_monitor(local);
515 /* must be before the call to ieee80211_configure_filter */
517 if (local->monitors == 1) {
518 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
519 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
522 ieee80211_adjust_monitor_flags(sdata, 1);
523 ieee80211_configure_filter(local);
525 netif_carrier_on(dev);
529 ieee80211_del_virtual_monitor(local);
531 res = drv_add_interface(local, sdata);
534 res = ieee80211_check_queues(sdata);
536 goto err_del_interface;
539 if (sdata->vif.type == NL80211_IFTYPE_AP) {
541 local->fif_probe_req++;
543 ieee80211_configure_filter(local);
544 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
545 local->fif_probe_req++;
548 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
549 changed |= ieee80211_reset_erp_info(sdata);
550 ieee80211_bss_info_change_notify(sdata, changed);
552 switch (sdata->vif.type) {
553 case NL80211_IFTYPE_STATION:
554 case NL80211_IFTYPE_ADHOC:
555 case NL80211_IFTYPE_AP:
556 case NL80211_IFTYPE_MESH_POINT:
557 netif_carrier_off(dev);
559 case NL80211_IFTYPE_WDS:
560 case NL80211_IFTYPE_P2P_DEVICE:
563 netif_carrier_on(dev);
567 * set default queue parameters so drivers don't
568 * need to initialise the hardware if the hardware
569 * doesn't start up with sane defaults
571 ieee80211_set_wmm_default(sdata, true);
574 set_bit(SDATA_STATE_RUNNING, &sdata->state);
576 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
577 /* Create STA entry for the WDS peer */
578 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
582 goto err_del_interface;
585 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
586 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
587 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
589 res = sta_info_insert(sta);
591 /* STA has been freed */
592 goto err_del_interface;
595 rate_control_rate_init(sta);
596 netif_carrier_on(dev);
597 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
598 rcu_assign_pointer(local->p2p_sdata, sdata);
602 * set_multicast_list will be invoked by the networking core
603 * which will check whether any increments here were done in
604 * error and sync them down to the hardware as filter flags.
606 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
607 atomic_inc(&local->iff_allmultis);
609 if (sdata->flags & IEEE80211_SDATA_PROMISC)
610 atomic_inc(&local->iff_promiscs);
612 mutex_lock(&local->mtx);
613 hw_reconf_flags |= __ieee80211_recalc_idle(local);
614 mutex_unlock(&local->mtx);
620 ieee80211_hw_config(local, hw_reconf_flags);
622 ieee80211_recalc_ps(local, -1);
625 netif_tx_start_all_queues(dev);
629 drv_remove_interface(local, sdata);
631 if (!local->open_count)
635 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
636 list_del(&sdata->u.vlan.list);
637 /* might already be clear but that doesn't matter */
638 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
642 static int ieee80211_open(struct net_device *dev)
644 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
647 /* fail early if user set an invalid address */
648 if (!is_valid_ether_addr(dev->dev_addr))
649 return -EADDRNOTAVAIL;
651 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
655 return ieee80211_do_open(&sdata->wdev, true);
658 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
661 struct ieee80211_local *local = sdata->local;
663 struct sk_buff *skb, *tmp;
664 u32 hw_reconf_flags = 0;
666 enum nl80211_channel_type orig_ct;
668 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
670 if (rcu_access_pointer(local->scan_sdata) == sdata)
671 ieee80211_scan_cancel(local);
674 * Stop TX on this interface first.
677 netif_tx_stop_all_queues(sdata->dev);
679 ieee80211_roc_purge(sdata);
682 * Remove all stations associated with this interface.
684 * This must be done before calling ops->remove_interface()
685 * because otherwise we can later invoke ops->sta_notify()
686 * whenever the STAs are removed, and that invalidates driver
687 * assumptions about always getting a vif pointer that is valid
688 * (because if we remove a STA after ops->remove_interface()
689 * the driver will have removed the vif info already!)
691 * This is relevant only in AP, WDS and mesh modes, since in
692 * all other modes we've already removed all stations when
695 sta_info_flush(local, sdata);
698 * Don't count this interface for promisc/allmulti while it
699 * is down. dev_mc_unsync() will invoke set_multicast_list
700 * on the master interface which will sync these down to the
701 * hardware as filter flags.
703 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
704 atomic_dec(&local->iff_allmultis);
706 if (sdata->flags & IEEE80211_SDATA_PROMISC)
707 atomic_dec(&local->iff_promiscs);
709 if (sdata->vif.type == NL80211_IFTYPE_AP) {
711 local->fif_probe_req--;
712 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
713 local->fif_probe_req--;
717 netif_addr_lock_bh(sdata->dev);
718 spin_lock_bh(&local->filter_lock);
719 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
720 sdata->dev->addr_len);
721 spin_unlock_bh(&local->filter_lock);
722 netif_addr_unlock_bh(sdata->dev);
724 ieee80211_configure_filter(local);
727 del_timer_sync(&local->dynamic_ps_timer);
728 cancel_work_sync(&local->dynamic_ps_enable_work);
730 /* APs need special treatment */
731 if (sdata->vif.type == NL80211_IFTYPE_AP) {
732 struct ieee80211_sub_if_data *vlan, *tmpsdata;
733 struct beacon_data *old_beacon =
734 rtnl_dereference(sdata->u.ap.beacon);
735 struct probe_resp *old_probe_resp =
736 rtnl_dereference(sdata->u.ap.probe_resp);
738 /* sdata_running will return false, so this will disable */
739 ieee80211_bss_info_change_notify(sdata,
740 BSS_CHANGED_BEACON_ENABLED);
742 /* remove beacon and probe response */
743 RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
744 RCU_INIT_POINTER(sdata->u.ap.probe_resp, NULL);
747 kfree(old_probe_resp);
749 /* down all dependent devices, that is VLANs */
750 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
752 dev_close(vlan->dev);
753 WARN_ON(!list_empty(&sdata->u.ap.vlans));
755 /* free all potentially still buffered bcast frames */
756 local->total_ps_buffered -= skb_queue_len(&sdata->u.ap.ps_bc_buf);
757 skb_queue_purge(&sdata->u.ap.ps_bc_buf);
758 } else if (sdata->vif.type == NL80211_IFTYPE_STATION) {
759 ieee80211_mgd_stop(sdata);
765 switch (sdata->vif.type) {
766 case NL80211_IFTYPE_AP_VLAN:
767 list_del(&sdata->u.vlan.list);
768 /* no need to tell driver */
770 case NL80211_IFTYPE_MONITOR:
771 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
772 local->cooked_mntrs--;
777 if (local->monitors == 0) {
778 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
779 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
780 ieee80211_del_virtual_monitor(local);
783 ieee80211_adjust_monitor_flags(sdata, -1);
784 ieee80211_configure_filter(local);
786 case NL80211_IFTYPE_P2P_DEVICE:
787 /* relies on synchronize_rcu() below */
788 rcu_assign_pointer(local->p2p_sdata, NULL);
791 flush_work(&sdata->work);
793 * When we get here, the interface is marked down.
794 * Call synchronize_rcu() to wait for the RX path
795 * should it be using the interface and enqueuing
796 * frames at this very time on another CPU.
799 skb_queue_purge(&sdata->skb_queue);
802 * Free all remaining keys, there shouldn't be any,
803 * except maybe group keys in AP more or WDS?
805 ieee80211_free_keys(sdata);
808 drv_remove_interface(local, sdata);
813 mutex_lock(&local->mtx);
814 hw_reconf_flags |= __ieee80211_recalc_idle(local);
815 mutex_unlock(&local->mtx);
817 ieee80211_recalc_ps(local, -1);
819 if (local->open_count == 0) {
820 if (local->ops->napi_poll)
821 napi_disable(&local->napi);
822 ieee80211_clear_tx_pending(local);
823 ieee80211_stop_device(local);
825 /* no reconfiguring after stop! */
829 /* Re-calculate channel-type, in case there are multiple vifs
830 * on different channel types.
832 orig_ct = local->_oper_channel_type;
833 ieee80211_set_channel_type(local, NULL, NL80211_CHAN_NO_HT);
835 /* do after stop to avoid reconfiguring when we stop anyway */
836 if (hw_reconf_flags || (orig_ct != local->_oper_channel_type))
837 ieee80211_hw_config(local, hw_reconf_flags);
839 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
840 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
841 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
842 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
843 if (info->control.vif == &sdata->vif) {
844 __skb_unlink(skb, &local->pending[i]);
845 dev_kfree_skb_irq(skb);
849 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
851 if (local->monitors == local->open_count && local->monitors > 0)
852 ieee80211_add_virtual_monitor(local);
855 static int ieee80211_stop(struct net_device *dev)
857 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
859 ieee80211_do_stop(sdata, true);
864 static void ieee80211_set_multicast_list(struct net_device *dev)
866 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
867 struct ieee80211_local *local = sdata->local;
868 int allmulti, promisc, sdata_allmulti, sdata_promisc;
870 allmulti = !!(dev->flags & IFF_ALLMULTI);
871 promisc = !!(dev->flags & IFF_PROMISC);
872 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
873 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
875 if (allmulti != sdata_allmulti) {
876 if (dev->flags & IFF_ALLMULTI)
877 atomic_inc(&local->iff_allmultis);
879 atomic_dec(&local->iff_allmultis);
880 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
883 if (promisc != sdata_promisc) {
884 if (dev->flags & IFF_PROMISC)
885 atomic_inc(&local->iff_promiscs);
887 atomic_dec(&local->iff_promiscs);
888 sdata->flags ^= IEEE80211_SDATA_PROMISC;
890 spin_lock_bh(&local->filter_lock);
891 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
892 spin_unlock_bh(&local->filter_lock);
893 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
897 * Called when the netdev is removed or, by the code below, before
898 * the interface type changes.
900 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
902 struct ieee80211_local *local = sdata->local;
906 /* free extra data */
907 ieee80211_free_keys(sdata);
909 ieee80211_debugfs_remove_netdev(sdata);
911 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
912 __skb_queue_purge(&sdata->fragments[i].skb_list);
913 sdata->fragment_next = 0;
915 if (ieee80211_vif_is_mesh(&sdata->vif))
916 mesh_rmc_free(sdata);
918 flushed = sta_info_flush(local, sdata);
922 static void ieee80211_uninit(struct net_device *dev)
924 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
927 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
930 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
933 static const struct net_device_ops ieee80211_dataif_ops = {
934 .ndo_open = ieee80211_open,
935 .ndo_stop = ieee80211_stop,
936 .ndo_uninit = ieee80211_uninit,
937 .ndo_start_xmit = ieee80211_subif_start_xmit,
938 .ndo_set_rx_mode = ieee80211_set_multicast_list,
939 .ndo_change_mtu = ieee80211_change_mtu,
940 .ndo_set_mac_address = ieee80211_change_mac,
941 .ndo_select_queue = ieee80211_netdev_select_queue,
944 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
947 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
948 struct ieee80211_local *local = sdata->local;
949 struct ieee80211_hdr *hdr;
950 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
952 if (local->hw.queues < IEEE80211_NUM_ACS)
956 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
957 return 0; /* doesn't matter, frame will be dropped */
959 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
961 return ieee80211_select_queue_80211(sdata, skb, hdr);
964 static const struct net_device_ops ieee80211_monitorif_ops = {
965 .ndo_open = ieee80211_open,
966 .ndo_stop = ieee80211_stop,
967 .ndo_uninit = ieee80211_uninit,
968 .ndo_start_xmit = ieee80211_monitor_start_xmit,
969 .ndo_set_rx_mode = ieee80211_set_multicast_list,
970 .ndo_change_mtu = ieee80211_change_mtu,
971 .ndo_set_mac_address = eth_mac_addr,
972 .ndo_select_queue = ieee80211_monitor_select_queue,
975 static void ieee80211_if_setup(struct net_device *dev)
978 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
979 dev->netdev_ops = &ieee80211_dataif_ops;
980 dev->destructor = free_netdev;
983 static void ieee80211_iface_work(struct work_struct *work)
985 struct ieee80211_sub_if_data *sdata =
986 container_of(work, struct ieee80211_sub_if_data, work);
987 struct ieee80211_local *local = sdata->local;
989 struct sta_info *sta;
990 struct ieee80211_ra_tid *ra_tid;
992 if (!ieee80211_sdata_running(sdata))
999 * ieee80211_queue_work() should have picked up most cases,
1000 * here we'll pick the rest.
1002 if (WARN(local->suspended,
1003 "interface work scheduled while going to suspend\n"))
1006 /* first process frames */
1007 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1008 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1010 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1011 ra_tid = (void *)&skb->cb;
1012 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1014 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1015 ra_tid = (void *)&skb->cb;
1016 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1018 } else if (ieee80211_is_action(mgmt->frame_control) &&
1019 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1022 mutex_lock(&local->sta_mtx);
1023 sta = sta_info_get_bss(sdata, mgmt->sa);
1025 switch (mgmt->u.action.u.addba_req.action_code) {
1026 case WLAN_ACTION_ADDBA_REQ:
1027 ieee80211_process_addba_request(
1028 local, sta, mgmt, len);
1030 case WLAN_ACTION_ADDBA_RESP:
1031 ieee80211_process_addba_resp(local, sta,
1034 case WLAN_ACTION_DELBA:
1035 ieee80211_process_delba(sdata, sta,
1043 mutex_unlock(&local->sta_mtx);
1044 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1045 struct ieee80211_hdr *hdr = (void *)mgmt;
1047 * So the frame isn't mgmt, but frame_control
1048 * is at the right place anyway, of course, so
1049 * the if statement is correct.
1051 * Warn if we have other data frame types here,
1052 * they must not get here.
1054 WARN_ON(hdr->frame_control &
1055 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1056 WARN_ON(!(hdr->seq_ctrl &
1057 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1059 * This was a fragment of a frame, received while
1060 * a block-ack session was active. That cannot be
1061 * right, so terminate the session.
1063 mutex_lock(&local->sta_mtx);
1064 sta = sta_info_get_bss(sdata, mgmt->sa);
1066 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1067 IEEE80211_QOS_CTL_TID_MASK;
1069 __ieee80211_stop_rx_ba_session(
1070 sta, tid, WLAN_BACK_RECIPIENT,
1071 WLAN_REASON_QSTA_REQUIRE_SETUP,
1074 mutex_unlock(&local->sta_mtx);
1075 } else switch (sdata->vif.type) {
1076 case NL80211_IFTYPE_STATION:
1077 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1079 case NL80211_IFTYPE_ADHOC:
1080 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1082 case NL80211_IFTYPE_MESH_POINT:
1083 if (!ieee80211_vif_is_mesh(&sdata->vif))
1085 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1088 WARN(1, "frame for unexpected interface type");
1095 /* then other type-dependent work */
1096 switch (sdata->vif.type) {
1097 case NL80211_IFTYPE_STATION:
1098 ieee80211_sta_work(sdata);
1100 case NL80211_IFTYPE_ADHOC:
1101 ieee80211_ibss_work(sdata);
1103 case NL80211_IFTYPE_MESH_POINT:
1104 if (!ieee80211_vif_is_mesh(&sdata->vif))
1106 ieee80211_mesh_work(sdata);
1115 * Helper function to initialise an interface to a specific type.
1117 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1118 enum nl80211_iftype type)
1120 /* clear type-dependent union */
1121 memset(&sdata->u, 0, sizeof(sdata->u));
1123 /* and set some type-dependent values */
1124 sdata->vif.type = type;
1125 sdata->vif.p2p = false;
1126 sdata->wdev.iftype = type;
1128 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1129 sdata->control_port_no_encrypt = false;
1131 sdata->noack_map = 0;
1133 /* only monitor/p2p-device differ */
1135 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1136 sdata->dev->type = ARPHRD_ETHER;
1139 skb_queue_head_init(&sdata->skb_queue);
1140 INIT_WORK(&sdata->work, ieee80211_iface_work);
1143 case NL80211_IFTYPE_P2P_GO:
1144 type = NL80211_IFTYPE_AP;
1145 sdata->vif.type = type;
1146 sdata->vif.p2p = true;
1148 case NL80211_IFTYPE_AP:
1149 skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
1150 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1152 case NL80211_IFTYPE_P2P_CLIENT:
1153 type = NL80211_IFTYPE_STATION;
1154 sdata->vif.type = type;
1155 sdata->vif.p2p = true;
1157 case NL80211_IFTYPE_STATION:
1158 ieee80211_sta_setup_sdata(sdata);
1160 case NL80211_IFTYPE_ADHOC:
1161 ieee80211_ibss_setup_sdata(sdata);
1163 case NL80211_IFTYPE_MESH_POINT:
1164 if (ieee80211_vif_is_mesh(&sdata->vif))
1165 ieee80211_mesh_init_sdata(sdata);
1167 case NL80211_IFTYPE_MONITOR:
1168 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1169 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1170 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1171 MONITOR_FLAG_OTHER_BSS;
1173 case NL80211_IFTYPE_WDS:
1174 case NL80211_IFTYPE_AP_VLAN:
1175 case NL80211_IFTYPE_P2P_DEVICE:
1177 case NL80211_IFTYPE_UNSPECIFIED:
1178 case NUM_NL80211_IFTYPES:
1183 ieee80211_debugfs_add_netdev(sdata);
1186 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1187 enum nl80211_iftype type)
1189 struct ieee80211_local *local = sdata->local;
1191 enum nl80211_iftype internal_type = type;
1196 if (!local->ops->change_interface)
1199 switch (sdata->vif.type) {
1200 case NL80211_IFTYPE_AP:
1201 case NL80211_IFTYPE_STATION:
1202 case NL80211_IFTYPE_ADHOC:
1204 * Could maybe also all others here?
1205 * Just not sure how that interacts
1206 * with the RX/config path e.g. for
1215 case NL80211_IFTYPE_AP:
1216 case NL80211_IFTYPE_STATION:
1217 case NL80211_IFTYPE_ADHOC:
1219 * Could probably support everything
1220 * but WDS here (WDS do_open can fail
1221 * under memory pressure, which this
1222 * code isn't prepared to handle).
1225 case NL80211_IFTYPE_P2P_CLIENT:
1227 internal_type = NL80211_IFTYPE_STATION;
1229 case NL80211_IFTYPE_P2P_GO:
1231 internal_type = NL80211_IFTYPE_AP;
1237 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1241 ieee80211_do_stop(sdata, false);
1243 ieee80211_teardown_sdata(sdata);
1245 ret = drv_change_interface(local, sdata, internal_type, p2p);
1247 type = sdata->vif.type;
1250 * Ignore return value here, there's not much we can do since
1251 * the driver changed the interface type internally already.
1252 * The warnings will hopefully make driver authors fix it :-)
1254 ieee80211_check_queues(sdata);
1256 ieee80211_setup_sdata(sdata, type);
1258 err = ieee80211_do_open(&sdata->wdev, false);
1259 WARN(err, "type change: do_open returned %d", err);
1264 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1265 enum nl80211_iftype type)
1271 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1274 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
1275 if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS &&
1276 type == NL80211_IFTYPE_ADHOC)
1279 if (ieee80211_sdata_running(sdata)) {
1280 ret = ieee80211_runtime_change_iftype(sdata, type);
1284 /* Purge and reset type-dependent state. */
1285 ieee80211_teardown_sdata(sdata);
1286 ieee80211_setup_sdata(sdata, type);
1289 /* reset some values that shouldn't be kept across type changes */
1290 sdata->vif.bss_conf.basic_rates =
1291 ieee80211_mandatory_rates(sdata->local,
1292 sdata->local->oper_channel->band);
1293 sdata->drop_unencrypted = 0;
1294 if (type == NL80211_IFTYPE_STATION)
1295 sdata->u.mgd.use_4addr = false;
1300 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1301 u8 *perm_addr, enum nl80211_iftype type)
1303 struct ieee80211_sub_if_data *sdata;
1304 u64 mask, start, addr, val, inc;
1306 u8 tmp_addr[ETH_ALEN];
1309 /* default ... something at least */
1310 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1312 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1313 local->hw.wiphy->n_addresses <= 1)
1317 mutex_lock(&local->iflist_mtx);
1320 case NL80211_IFTYPE_MONITOR:
1321 /* doesn't matter */
1323 case NL80211_IFTYPE_WDS:
1324 case NL80211_IFTYPE_AP_VLAN:
1325 /* match up with an AP interface */
1326 list_for_each_entry(sdata, &local->interfaces, list) {
1327 if (sdata->vif.type != NL80211_IFTYPE_AP)
1329 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1332 /* keep default if no AP interface present */
1335 /* assign a new address if possible -- try n_addresses first */
1336 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1339 list_for_each_entry(sdata, &local->interfaces, list) {
1340 if (memcmp(local->hw.wiphy->addresses[i].addr,
1341 sdata->vif.addr, ETH_ALEN) == 0) {
1349 local->hw.wiphy->addresses[i].addr,
1355 /* try mask if available */
1356 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1359 m = local->hw.wiphy->addr_mask;
1360 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1361 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1362 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1364 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1365 /* not a contiguous mask ... not handled now! */
1366 pr_info("not contiguous\n");
1370 m = local->hw.wiphy->perm_addr;
1371 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1372 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1373 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1375 inc = 1ULL<<__ffs64(mask);
1376 val = (start & mask);
1377 addr = (start & ~mask) | (val & mask);
1381 tmp_addr[5] = addr >> 0*8;
1382 tmp_addr[4] = addr >> 1*8;
1383 tmp_addr[3] = addr >> 2*8;
1384 tmp_addr[2] = addr >> 3*8;
1385 tmp_addr[1] = addr >> 4*8;
1386 tmp_addr[0] = addr >> 5*8;
1390 list_for_each_entry(sdata, &local->interfaces, list) {
1391 if (memcmp(tmp_addr, sdata->vif.addr,
1399 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1402 addr = (start & ~mask) | (val & mask);
1403 } while (addr != start);
1408 mutex_unlock(&local->iflist_mtx);
1411 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1412 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1413 struct vif_params *params)
1415 struct net_device *ndev = NULL;
1416 struct ieee80211_sub_if_data *sdata = NULL;
1422 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1423 struct wireless_dev *wdev;
1425 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1429 wdev = &sdata->wdev;
1432 strlcpy(sdata->name, name, IFNAMSIZ);
1433 ieee80211_assign_perm_addr(local, wdev->address, type);
1434 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1436 if (local->hw.queues >= IEEE80211_NUM_ACS)
1437 txqs = IEEE80211_NUM_ACS;
1439 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1440 local->hw.vif_data_size,
1441 name, ieee80211_if_setup, txqs, 1);
1444 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1446 ndev->needed_headroom = local->tx_headroom +
1447 4*6 /* four MAC addresses */
1448 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1450 + 8 /* rfc1042/bridge tunnel */
1451 - ETH_HLEN /* ethernet hard_header_len */
1452 + IEEE80211_ENCRYPT_HEADROOM;
1453 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1455 ret = dev_alloc_name(ndev, ndev->name);
1461 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1462 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1463 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1465 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1466 sdata = netdev_priv(ndev);
1467 ndev->ieee80211_ptr = &sdata->wdev;
1468 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1469 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1474 /* initialise type-independent data */
1475 sdata->wdev.wiphy = local->hw.wiphy;
1476 sdata->local = local;
1478 sdata->arp_filter_state = true;
1481 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1482 skb_queue_head_init(&sdata->fragments[i].skb_list);
1484 INIT_LIST_HEAD(&sdata->key_list);
1486 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1487 struct ieee80211_supported_band *sband;
1488 sband = local->hw.wiphy->bands[i];
1489 sdata->rc_rateidx_mask[i] =
1490 sband ? (1 << sband->n_bitrates) - 1 : 0;
1492 memcpy(sdata->rc_rateidx_mcs_mask[i],
1493 sband->ht_cap.mcs.rx_mask,
1494 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1496 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1497 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1500 ieee80211_set_default_queues(sdata);
1502 /* setup type-dependent data */
1503 ieee80211_setup_sdata(sdata, type);
1507 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1508 if (type == NL80211_IFTYPE_STATION)
1509 sdata->u.mgd.use_4addr = params->use_4addr;
1512 ndev->features |= local->hw.netdev_features;
1514 ret = register_netdevice(ndev);
1521 mutex_lock(&local->iflist_mtx);
1522 list_add_tail_rcu(&sdata->list, &local->interfaces);
1523 mutex_unlock(&local->iflist_mtx);
1526 *new_wdev = &sdata->wdev;
1531 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1535 mutex_lock(&sdata->local->iflist_mtx);
1536 list_del_rcu(&sdata->list);
1537 mutex_unlock(&sdata->local->iflist_mtx);
1542 unregister_netdevice(sdata->dev);
1544 cfg80211_unregister_wdev(&sdata->wdev);
1549 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1551 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1553 ieee80211_do_stop(sdata, true);
1554 ieee80211_teardown_sdata(sdata);
1558 * Remove all interfaces, may only be called at hardware unregistration
1559 * time because it doesn't do RCU-safe list removals.
1561 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1563 struct ieee80211_sub_if_data *sdata, *tmp;
1564 LIST_HEAD(unreg_list);
1565 LIST_HEAD(wdev_list);
1569 mutex_lock(&local->iflist_mtx);
1570 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1571 list_del(&sdata->list);
1574 unregister_netdevice_queue(sdata->dev, &unreg_list);
1576 list_add(&sdata->list, &wdev_list);
1578 mutex_unlock(&local->iflist_mtx);
1579 unregister_netdevice_many(&unreg_list);
1580 list_del(&unreg_list);
1582 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1583 list_del(&sdata->list);
1584 cfg80211_unregister_wdev(&sdata->wdev);
1589 static int netdev_notify(struct notifier_block *nb,
1590 unsigned long state,
1593 struct net_device *dev = ndev;
1594 struct ieee80211_sub_if_data *sdata;
1596 if (state != NETDEV_CHANGENAME)
1599 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1602 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1605 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1607 memcpy(sdata->name, dev->name, IFNAMSIZ);
1609 ieee80211_debugfs_rename_netdev(sdata);
1613 static struct notifier_block mac80211_netdev_notifier = {
1614 .notifier_call = netdev_notify,
1617 int ieee80211_iface_init(void)
1619 return register_netdevice_notifier(&mac80211_netdev_notifier);
1622 void ieee80211_iface_exit(void)
1624 unregister_netdevice_notifier(&mac80211_netdev_notifier);