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 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
282 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
283 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
284 IEEE80211_INVAL_HW_QUEUE))
286 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
292 if ((sdata->vif.type != NL80211_IFTYPE_AP) ||
293 !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
294 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
298 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
301 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
307 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
310 struct ieee80211_local *local = sdata->local;
311 u32 flags = sdata->u.mntr_flags;
313 #define ADJUST(_f, _s) do { \
314 if (flags & MONITOR_FLAG_##_f) \
315 local->fif_##_s += offset; \
318 ADJUST(FCSFAIL, fcsfail);
319 ADJUST(PLCPFAIL, plcpfail);
320 ADJUST(CONTROL, control);
321 ADJUST(CONTROL, pspoll);
322 ADJUST(OTHER_BSS, other_bss);
327 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
329 struct ieee80211_local *local = sdata->local;
332 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
333 if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
334 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
335 else if (local->hw.queues >= IEEE80211_NUM_ACS)
336 sdata->vif.hw_queue[i] = i;
338 sdata->vif.hw_queue[i] = 0;
340 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
343 static int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
345 struct ieee80211_sub_if_data *sdata;
348 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
351 mutex_lock(&local->iflist_mtx);
353 if (local->monitor_sdata)
356 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
363 sdata->local = local;
364 sdata->vif.type = NL80211_IFTYPE_MONITOR;
365 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
366 wiphy_name(local->hw.wiphy));
368 ieee80211_set_default_queues(sdata);
370 ret = drv_add_interface(local, sdata);
372 /* ok .. stupid driver, it asked for this! */
377 ret = ieee80211_check_queues(sdata);
383 ret = ieee80211_vif_use_channel(sdata, local->monitor_channel,
384 local->monitor_channel_type,
385 IEEE80211_CHANCTX_EXCLUSIVE);
387 drv_remove_interface(local, sdata);
392 rcu_assign_pointer(local->monitor_sdata, sdata);
394 mutex_unlock(&local->iflist_mtx);
398 static void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
400 struct ieee80211_sub_if_data *sdata;
402 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
405 mutex_lock(&local->iflist_mtx);
407 sdata = rcu_dereference_protected(local->monitor_sdata,
408 lockdep_is_held(&local->iflist_mtx));
412 rcu_assign_pointer(local->monitor_sdata, NULL);
415 ieee80211_vif_release_channel(sdata);
417 drv_remove_interface(local, sdata);
421 mutex_unlock(&local->iflist_mtx);
425 * NOTE: Be very careful when changing this function, it must NOT return
426 * an error on interface type changes that have been pre-checked, so most
427 * checks should be in ieee80211_check_concurrent_iface.
429 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
431 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
432 struct net_device *dev = wdev->netdev;
433 struct ieee80211_local *local = sdata->local;
434 struct sta_info *sta;
437 u32 hw_reconf_flags = 0;
439 switch (sdata->vif.type) {
440 case NL80211_IFTYPE_WDS:
441 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
444 case NL80211_IFTYPE_AP_VLAN: {
445 struct ieee80211_sub_if_data *master;
450 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
452 master = container_of(sdata->bss,
453 struct ieee80211_sub_if_data, u.ap);
454 sdata->control_port_protocol =
455 master->control_port_protocol;
456 sdata->control_port_no_encrypt =
457 master->control_port_no_encrypt;
460 case NL80211_IFTYPE_AP:
461 sdata->bss = &sdata->u.ap;
463 case NL80211_IFTYPE_MESH_POINT:
464 case NL80211_IFTYPE_STATION:
465 case NL80211_IFTYPE_MONITOR:
466 case NL80211_IFTYPE_ADHOC:
467 case NL80211_IFTYPE_P2P_DEVICE:
468 /* no special treatment */
470 case NL80211_IFTYPE_UNSPECIFIED:
471 case NUM_NL80211_IFTYPES:
472 case NL80211_IFTYPE_P2P_CLIENT:
473 case NL80211_IFTYPE_P2P_GO:
479 if (local->open_count == 0) {
480 res = drv_start(local);
483 if (local->ops->napi_poll)
484 napi_enable(&local->napi);
485 /* we're brought up, everything changes */
486 hw_reconf_flags = ~0;
487 ieee80211_led_radio(local, true);
488 ieee80211_mod_tpt_led_trig(local,
489 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
493 * Copy the hopefully now-present MAC address to
494 * this interface, if it has the special null one.
496 if (dev && is_zero_ether_addr(dev->dev_addr)) {
497 memcpy(dev->dev_addr,
498 local->hw.wiphy->perm_addr,
500 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
502 if (!is_valid_ether_addr(dev->dev_addr)) {
503 res = -EADDRNOTAVAIL;
508 switch (sdata->vif.type) {
509 case NL80211_IFTYPE_AP_VLAN:
510 /* no need to tell driver, but set carrier */
511 if (rtnl_dereference(sdata->bss->beacon))
512 netif_carrier_on(dev);
514 netif_carrier_off(dev);
516 case NL80211_IFTYPE_MONITOR:
517 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
518 local->cooked_mntrs++;
522 if (local->monitors == 0 && local->open_count == 0) {
523 res = ieee80211_add_virtual_monitor(local);
528 /* must be before the call to ieee80211_configure_filter */
530 if (local->monitors == 1) {
531 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
532 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
535 ieee80211_adjust_monitor_flags(sdata, 1);
536 ieee80211_configure_filter(local);
538 netif_carrier_on(dev);
542 ieee80211_del_virtual_monitor(local);
544 res = drv_add_interface(local, sdata);
547 res = ieee80211_check_queues(sdata);
549 goto err_del_interface;
552 if (sdata->vif.type == NL80211_IFTYPE_AP) {
554 local->fif_probe_req++;
556 ieee80211_configure_filter(local);
557 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
558 local->fif_probe_req++;
561 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
562 changed |= ieee80211_reset_erp_info(sdata);
563 ieee80211_bss_info_change_notify(sdata, changed);
565 switch (sdata->vif.type) {
566 case NL80211_IFTYPE_STATION:
567 case NL80211_IFTYPE_ADHOC:
568 case NL80211_IFTYPE_AP:
569 case NL80211_IFTYPE_MESH_POINT:
570 netif_carrier_off(dev);
572 case NL80211_IFTYPE_WDS:
573 case NL80211_IFTYPE_P2P_DEVICE:
576 netif_carrier_on(dev);
580 * set default queue parameters so drivers don't
581 * need to initialise the hardware if the hardware
582 * doesn't start up with sane defaults
584 ieee80211_set_wmm_default(sdata, true);
587 set_bit(SDATA_STATE_RUNNING, &sdata->state);
589 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
590 /* Create STA entry for the WDS peer */
591 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
595 goto err_del_interface;
598 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
599 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
600 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
602 res = sta_info_insert(sta);
604 /* STA has been freed */
605 goto err_del_interface;
608 rate_control_rate_init(sta);
609 netif_carrier_on(dev);
610 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
611 rcu_assign_pointer(local->p2p_sdata, sdata);
615 * set_multicast_list will be invoked by the networking core
616 * which will check whether any increments here were done in
617 * error and sync them down to the hardware as filter flags.
619 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
620 atomic_inc(&local->iff_allmultis);
622 if (sdata->flags & IEEE80211_SDATA_PROMISC)
623 atomic_inc(&local->iff_promiscs);
625 mutex_lock(&local->mtx);
626 hw_reconf_flags |= __ieee80211_recalc_idle(local);
627 mutex_unlock(&local->mtx);
633 ieee80211_hw_config(local, hw_reconf_flags);
635 ieee80211_recalc_ps(local, -1);
638 netif_tx_start_all_queues(dev);
642 drv_remove_interface(local, sdata);
644 if (!local->open_count)
648 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
649 list_del(&sdata->u.vlan.list);
650 /* might already be clear but that doesn't matter */
651 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
655 static int ieee80211_open(struct net_device *dev)
657 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
660 /* fail early if user set an invalid address */
661 if (!is_valid_ether_addr(dev->dev_addr))
662 return -EADDRNOTAVAIL;
664 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
668 return ieee80211_do_open(&sdata->wdev, true);
671 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
674 struct ieee80211_local *local = sdata->local;
676 struct sk_buff *skb, *tmp;
677 u32 hw_reconf_flags = 0;
680 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
682 if (rcu_access_pointer(local->scan_sdata) == sdata)
683 ieee80211_scan_cancel(local);
686 * Stop TX on this interface first.
689 netif_tx_stop_all_queues(sdata->dev);
691 ieee80211_roc_purge(sdata);
694 * Remove all stations associated with this interface.
696 * This must be done before calling ops->remove_interface()
697 * because otherwise we can later invoke ops->sta_notify()
698 * whenever the STAs are removed, and that invalidates driver
699 * assumptions about always getting a vif pointer that is valid
700 * (because if we remove a STA after ops->remove_interface()
701 * the driver will have removed the vif info already!)
703 * This is relevant only in AP, WDS and mesh modes, since in
704 * all other modes we've already removed all stations when
707 sta_info_flush(local, sdata);
710 * Don't count this interface for promisc/allmulti while it
711 * is down. dev_mc_unsync() will invoke set_multicast_list
712 * on the master interface which will sync these down to the
713 * hardware as filter flags.
715 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
716 atomic_dec(&local->iff_allmultis);
718 if (sdata->flags & IEEE80211_SDATA_PROMISC)
719 atomic_dec(&local->iff_promiscs);
721 if (sdata->vif.type == NL80211_IFTYPE_AP) {
723 local->fif_probe_req--;
724 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
725 local->fif_probe_req--;
729 netif_addr_lock_bh(sdata->dev);
730 spin_lock_bh(&local->filter_lock);
731 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
732 sdata->dev->addr_len);
733 spin_unlock_bh(&local->filter_lock);
734 netif_addr_unlock_bh(sdata->dev);
736 ieee80211_configure_filter(local);
739 del_timer_sync(&local->dynamic_ps_timer);
740 cancel_work_sync(&local->dynamic_ps_enable_work);
742 cancel_work_sync(&sdata->recalc_smps);
744 /* APs need special treatment */
745 if (sdata->vif.type == NL80211_IFTYPE_AP) {
746 struct ieee80211_sub_if_data *vlan, *tmpsdata;
748 /* down all dependent devices, that is VLANs */
749 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
751 dev_close(vlan->dev);
752 WARN_ON(!list_empty(&sdata->u.ap.vlans));
753 } else if (sdata->vif.type == NL80211_IFTYPE_STATION) {
754 ieee80211_mgd_stop(sdata);
760 switch (sdata->vif.type) {
761 case NL80211_IFTYPE_AP_VLAN:
762 list_del(&sdata->u.vlan.list);
763 /* no need to tell driver */
765 case NL80211_IFTYPE_MONITOR:
766 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
767 local->cooked_mntrs--;
772 if (local->monitors == 0) {
773 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
774 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
775 ieee80211_del_virtual_monitor(local);
778 ieee80211_adjust_monitor_flags(sdata, -1);
779 ieee80211_configure_filter(local);
781 case NL80211_IFTYPE_P2P_DEVICE:
782 /* relies on synchronize_rcu() below */
783 rcu_assign_pointer(local->p2p_sdata, NULL);
786 flush_work(&sdata->work);
788 * When we get here, the interface is marked down.
789 * Call rcu_barrier() to wait both for the RX path
790 * should it be using the interface and enqueuing
791 * frames at this very time on another CPU, and
792 * for the sta free call_rcu callbacks.
797 * free_sta_rcu() enqueues a work for the actual
798 * sta cleanup, so we need to flush it while
799 * sdata is still valid.
801 flush_workqueue(local->workqueue);
803 skb_queue_purge(&sdata->skb_queue);
806 * Free all remaining keys, there shouldn't be any,
807 * except maybe group keys in AP more or WDS?
809 ieee80211_free_keys(sdata);
812 drv_remove_interface(local, sdata);
817 mutex_lock(&local->mtx);
818 hw_reconf_flags |= __ieee80211_recalc_idle(local);
819 mutex_unlock(&local->mtx);
821 ieee80211_recalc_ps(local, -1);
823 if (local->open_count == 0) {
824 if (local->ops->napi_poll)
825 napi_disable(&local->napi);
826 ieee80211_clear_tx_pending(local);
827 ieee80211_stop_device(local);
829 /* no reconfiguring after stop! */
833 /* do after stop to avoid reconfiguring when we stop anyway */
835 ieee80211_hw_config(local, hw_reconf_flags);
837 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
838 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
839 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
840 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
841 if (info->control.vif == &sdata->vif) {
842 __skb_unlink(skb, &local->pending[i]);
843 ieee80211_free_txskb(&local->hw, skb);
847 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
849 if (local->monitors == local->open_count && local->monitors > 0)
850 ieee80211_add_virtual_monitor(local);
853 static int ieee80211_stop(struct net_device *dev)
855 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
857 ieee80211_do_stop(sdata, true);
862 static void ieee80211_set_multicast_list(struct net_device *dev)
864 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
865 struct ieee80211_local *local = sdata->local;
866 int allmulti, promisc, sdata_allmulti, sdata_promisc;
868 allmulti = !!(dev->flags & IFF_ALLMULTI);
869 promisc = !!(dev->flags & IFF_PROMISC);
870 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
871 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
873 if (allmulti != sdata_allmulti) {
874 if (dev->flags & IFF_ALLMULTI)
875 atomic_inc(&local->iff_allmultis);
877 atomic_dec(&local->iff_allmultis);
878 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
881 if (promisc != sdata_promisc) {
882 if (dev->flags & IFF_PROMISC)
883 atomic_inc(&local->iff_promiscs);
885 atomic_dec(&local->iff_promiscs);
886 sdata->flags ^= IEEE80211_SDATA_PROMISC;
888 spin_lock_bh(&local->filter_lock);
889 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
890 spin_unlock_bh(&local->filter_lock);
891 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
895 * Called when the netdev is removed or, by the code below, before
896 * the interface type changes.
898 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
900 struct ieee80211_local *local = sdata->local;
904 /* free extra data */
905 ieee80211_free_keys(sdata);
907 ieee80211_debugfs_remove_netdev(sdata);
909 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
910 __skb_queue_purge(&sdata->fragments[i].skb_list);
911 sdata->fragment_next = 0;
913 if (ieee80211_vif_is_mesh(&sdata->vif))
914 mesh_rmc_free(sdata);
916 flushed = sta_info_flush(local, sdata);
920 static void ieee80211_uninit(struct net_device *dev)
922 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
925 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
928 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
931 static const struct net_device_ops ieee80211_dataif_ops = {
932 .ndo_open = ieee80211_open,
933 .ndo_stop = ieee80211_stop,
934 .ndo_uninit = ieee80211_uninit,
935 .ndo_start_xmit = ieee80211_subif_start_xmit,
936 .ndo_set_rx_mode = ieee80211_set_multicast_list,
937 .ndo_change_mtu = ieee80211_change_mtu,
938 .ndo_set_mac_address = ieee80211_change_mac,
939 .ndo_select_queue = ieee80211_netdev_select_queue,
942 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
945 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
946 struct ieee80211_local *local = sdata->local;
947 struct ieee80211_hdr *hdr;
948 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
950 if (local->hw.queues < IEEE80211_NUM_ACS)
954 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
955 return 0; /* doesn't matter, frame will be dropped */
957 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
959 return ieee80211_select_queue_80211(sdata, skb, hdr);
962 static const struct net_device_ops ieee80211_monitorif_ops = {
963 .ndo_open = ieee80211_open,
964 .ndo_stop = ieee80211_stop,
965 .ndo_uninit = ieee80211_uninit,
966 .ndo_start_xmit = ieee80211_monitor_start_xmit,
967 .ndo_set_rx_mode = ieee80211_set_multicast_list,
968 .ndo_change_mtu = ieee80211_change_mtu,
969 .ndo_set_mac_address = eth_mac_addr,
970 .ndo_select_queue = ieee80211_monitor_select_queue,
973 static void ieee80211_if_setup(struct net_device *dev)
976 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
977 dev->netdev_ops = &ieee80211_dataif_ops;
978 dev->destructor = free_netdev;
981 static void ieee80211_iface_work(struct work_struct *work)
983 struct ieee80211_sub_if_data *sdata =
984 container_of(work, struct ieee80211_sub_if_data, work);
985 struct ieee80211_local *local = sdata->local;
987 struct sta_info *sta;
988 struct ieee80211_ra_tid *ra_tid;
990 if (!ieee80211_sdata_running(sdata))
997 * ieee80211_queue_work() should have picked up most cases,
998 * here we'll pick the rest.
1000 if (WARN(local->suspended,
1001 "interface work scheduled while going to suspend\n"))
1004 /* first process frames */
1005 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1006 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1008 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1009 ra_tid = (void *)&skb->cb;
1010 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1012 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1013 ra_tid = (void *)&skb->cb;
1014 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1016 } else if (ieee80211_is_action(mgmt->frame_control) &&
1017 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1020 mutex_lock(&local->sta_mtx);
1021 sta = sta_info_get_bss(sdata, mgmt->sa);
1023 switch (mgmt->u.action.u.addba_req.action_code) {
1024 case WLAN_ACTION_ADDBA_REQ:
1025 ieee80211_process_addba_request(
1026 local, sta, mgmt, len);
1028 case WLAN_ACTION_ADDBA_RESP:
1029 ieee80211_process_addba_resp(local, sta,
1032 case WLAN_ACTION_DELBA:
1033 ieee80211_process_delba(sdata, sta,
1041 mutex_unlock(&local->sta_mtx);
1042 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1043 struct ieee80211_hdr *hdr = (void *)mgmt;
1045 * So the frame isn't mgmt, but frame_control
1046 * is at the right place anyway, of course, so
1047 * the if statement is correct.
1049 * Warn if we have other data frame types here,
1050 * they must not get here.
1052 WARN_ON(hdr->frame_control &
1053 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1054 WARN_ON(!(hdr->seq_ctrl &
1055 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1057 * This was a fragment of a frame, received while
1058 * a block-ack session was active. That cannot be
1059 * right, so terminate the session.
1061 mutex_lock(&local->sta_mtx);
1062 sta = sta_info_get_bss(sdata, mgmt->sa);
1064 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1065 IEEE80211_QOS_CTL_TID_MASK;
1067 __ieee80211_stop_rx_ba_session(
1068 sta, tid, WLAN_BACK_RECIPIENT,
1069 WLAN_REASON_QSTA_REQUIRE_SETUP,
1072 mutex_unlock(&local->sta_mtx);
1073 } else switch (sdata->vif.type) {
1074 case NL80211_IFTYPE_STATION:
1075 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1077 case NL80211_IFTYPE_ADHOC:
1078 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1080 case NL80211_IFTYPE_MESH_POINT:
1081 if (!ieee80211_vif_is_mesh(&sdata->vif))
1083 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1086 WARN(1, "frame for unexpected interface type");
1093 /* then other type-dependent work */
1094 switch (sdata->vif.type) {
1095 case NL80211_IFTYPE_STATION:
1096 ieee80211_sta_work(sdata);
1098 case NL80211_IFTYPE_ADHOC:
1099 ieee80211_ibss_work(sdata);
1101 case NL80211_IFTYPE_MESH_POINT:
1102 if (!ieee80211_vif_is_mesh(&sdata->vif))
1104 ieee80211_mesh_work(sdata);
1111 static void ieee80211_recalc_smps_work(struct work_struct *work)
1113 struct ieee80211_sub_if_data *sdata =
1114 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1116 ieee80211_recalc_smps(sdata);
1120 * Helper function to initialise an interface to a specific type.
1122 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1123 enum nl80211_iftype type)
1125 /* clear type-dependent union */
1126 memset(&sdata->u, 0, sizeof(sdata->u));
1128 /* and set some type-dependent values */
1129 sdata->vif.type = type;
1130 sdata->vif.p2p = false;
1131 sdata->wdev.iftype = type;
1133 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1134 sdata->control_port_no_encrypt = false;
1136 sdata->noack_map = 0;
1138 /* only monitor/p2p-device differ */
1140 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1141 sdata->dev->type = ARPHRD_ETHER;
1144 skb_queue_head_init(&sdata->skb_queue);
1145 INIT_WORK(&sdata->work, ieee80211_iface_work);
1146 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1149 case NL80211_IFTYPE_P2P_GO:
1150 type = NL80211_IFTYPE_AP;
1151 sdata->vif.type = type;
1152 sdata->vif.p2p = true;
1154 case NL80211_IFTYPE_AP:
1155 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1156 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1158 case NL80211_IFTYPE_P2P_CLIENT:
1159 type = NL80211_IFTYPE_STATION;
1160 sdata->vif.type = type;
1161 sdata->vif.p2p = true;
1163 case NL80211_IFTYPE_STATION:
1164 ieee80211_sta_setup_sdata(sdata);
1166 case NL80211_IFTYPE_ADHOC:
1167 ieee80211_ibss_setup_sdata(sdata);
1169 case NL80211_IFTYPE_MESH_POINT:
1170 if (ieee80211_vif_is_mesh(&sdata->vif))
1171 ieee80211_mesh_init_sdata(sdata);
1173 case NL80211_IFTYPE_MONITOR:
1174 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1175 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1176 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1177 MONITOR_FLAG_OTHER_BSS;
1179 case NL80211_IFTYPE_WDS:
1180 case NL80211_IFTYPE_AP_VLAN:
1181 case NL80211_IFTYPE_P2P_DEVICE:
1183 case NL80211_IFTYPE_UNSPECIFIED:
1184 case NUM_NL80211_IFTYPES:
1189 ieee80211_debugfs_add_netdev(sdata);
1192 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1193 enum nl80211_iftype type)
1195 struct ieee80211_local *local = sdata->local;
1197 enum nl80211_iftype internal_type = type;
1202 if (!local->ops->change_interface)
1205 switch (sdata->vif.type) {
1206 case NL80211_IFTYPE_AP:
1207 case NL80211_IFTYPE_STATION:
1208 case NL80211_IFTYPE_ADHOC:
1210 * Could maybe also all others here?
1211 * Just not sure how that interacts
1212 * with the RX/config path e.g. for
1221 case NL80211_IFTYPE_AP:
1222 case NL80211_IFTYPE_STATION:
1223 case NL80211_IFTYPE_ADHOC:
1225 * Could probably support everything
1226 * but WDS here (WDS do_open can fail
1227 * under memory pressure, which this
1228 * code isn't prepared to handle).
1231 case NL80211_IFTYPE_P2P_CLIENT:
1233 internal_type = NL80211_IFTYPE_STATION;
1235 case NL80211_IFTYPE_P2P_GO:
1237 internal_type = NL80211_IFTYPE_AP;
1243 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1247 ieee80211_do_stop(sdata, false);
1249 ieee80211_teardown_sdata(sdata);
1251 ret = drv_change_interface(local, sdata, internal_type, p2p);
1253 type = sdata->vif.type;
1256 * Ignore return value here, there's not much we can do since
1257 * the driver changed the interface type internally already.
1258 * The warnings will hopefully make driver authors fix it :-)
1260 ieee80211_check_queues(sdata);
1262 ieee80211_setup_sdata(sdata, type);
1264 err = ieee80211_do_open(&sdata->wdev, false);
1265 WARN(err, "type change: do_open returned %d", err);
1270 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1271 enum nl80211_iftype type)
1277 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1280 if (ieee80211_sdata_running(sdata)) {
1281 ret = ieee80211_runtime_change_iftype(sdata, type);
1285 /* Purge and reset type-dependent state. */
1286 ieee80211_teardown_sdata(sdata);
1287 ieee80211_setup_sdata(sdata, type);
1290 /* reset some values that shouldn't be kept across type changes */
1291 sdata->drop_unencrypted = 0;
1292 if (type == NL80211_IFTYPE_STATION)
1293 sdata->u.mgd.use_4addr = false;
1298 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1299 u8 *perm_addr, enum nl80211_iftype type)
1301 struct ieee80211_sub_if_data *sdata;
1302 u64 mask, start, addr, val, inc;
1304 u8 tmp_addr[ETH_ALEN];
1307 /* default ... something at least */
1308 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1310 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1311 local->hw.wiphy->n_addresses <= 1)
1314 mutex_lock(&local->iflist_mtx);
1317 case NL80211_IFTYPE_MONITOR:
1318 /* doesn't matter */
1320 case NL80211_IFTYPE_WDS:
1321 case NL80211_IFTYPE_AP_VLAN:
1322 /* match up with an AP interface */
1323 list_for_each_entry(sdata, &local->interfaces, list) {
1324 if (sdata->vif.type != NL80211_IFTYPE_AP)
1326 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1329 /* keep default if no AP interface present */
1331 case NL80211_IFTYPE_P2P_CLIENT:
1332 case NL80211_IFTYPE_P2P_GO:
1333 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1334 list_for_each_entry(sdata, &local->interfaces, list) {
1335 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1337 if (!ieee80211_sdata_running(sdata))
1339 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1343 /* otherwise fall through */
1345 /* assign a new address if possible -- try n_addresses first */
1346 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1349 list_for_each_entry(sdata, &local->interfaces, list) {
1350 if (memcmp(local->hw.wiphy->addresses[i].addr,
1351 sdata->vif.addr, ETH_ALEN) == 0) {
1359 local->hw.wiphy->addresses[i].addr,
1365 /* try mask if available */
1366 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1369 m = local->hw.wiphy->addr_mask;
1370 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1371 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1372 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1374 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1375 /* not a contiguous mask ... not handled now! */
1376 pr_info("not contiguous\n");
1380 m = local->hw.wiphy->perm_addr;
1381 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1382 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1383 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1385 inc = 1ULL<<__ffs64(mask);
1386 val = (start & mask);
1387 addr = (start & ~mask) | (val & mask);
1391 tmp_addr[5] = addr >> 0*8;
1392 tmp_addr[4] = addr >> 1*8;
1393 tmp_addr[3] = addr >> 2*8;
1394 tmp_addr[2] = addr >> 3*8;
1395 tmp_addr[1] = addr >> 4*8;
1396 tmp_addr[0] = addr >> 5*8;
1400 list_for_each_entry(sdata, &local->interfaces, list) {
1401 if (memcmp(tmp_addr, sdata->vif.addr,
1409 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1412 addr = (start & ~mask) | (val & mask);
1413 } while (addr != start);
1419 mutex_unlock(&local->iflist_mtx);
1422 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1423 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1424 struct vif_params *params)
1426 struct net_device *ndev = NULL;
1427 struct ieee80211_sub_if_data *sdata = NULL;
1433 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1434 struct wireless_dev *wdev;
1436 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1440 wdev = &sdata->wdev;
1443 strlcpy(sdata->name, name, IFNAMSIZ);
1444 ieee80211_assign_perm_addr(local, wdev->address, type);
1445 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1447 if (local->hw.queues >= IEEE80211_NUM_ACS)
1448 txqs = IEEE80211_NUM_ACS;
1450 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1451 local->hw.vif_data_size,
1452 name, ieee80211_if_setup, txqs, 1);
1455 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1457 ndev->needed_headroom = local->tx_headroom +
1458 4*6 /* four MAC addresses */
1459 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1461 + 8 /* rfc1042/bridge tunnel */
1462 - ETH_HLEN /* ethernet hard_header_len */
1463 + IEEE80211_ENCRYPT_HEADROOM;
1464 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1466 ret = dev_alloc_name(ndev, ndev->name);
1472 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1473 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1474 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1476 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1477 sdata = netdev_priv(ndev);
1478 ndev->ieee80211_ptr = &sdata->wdev;
1479 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1480 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1485 /* initialise type-independent data */
1486 sdata->wdev.wiphy = local->hw.wiphy;
1487 sdata->local = local;
1489 sdata->arp_filter_state = true;
1492 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1493 skb_queue_head_init(&sdata->fragments[i].skb_list);
1495 INIT_LIST_HEAD(&sdata->key_list);
1497 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1498 struct ieee80211_supported_band *sband;
1499 sband = local->hw.wiphy->bands[i];
1500 sdata->rc_rateidx_mask[i] =
1501 sband ? (1 << sband->n_bitrates) - 1 : 0;
1503 memcpy(sdata->rc_rateidx_mcs_mask[i],
1504 sband->ht_cap.mcs.rx_mask,
1505 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1507 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1508 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1511 ieee80211_set_default_queues(sdata);
1513 /* setup type-dependent data */
1514 ieee80211_setup_sdata(sdata, type);
1518 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1519 if (type == NL80211_IFTYPE_STATION)
1520 sdata->u.mgd.use_4addr = params->use_4addr;
1523 ndev->features |= local->hw.netdev_features;
1525 ret = register_netdevice(ndev);
1532 mutex_lock(&local->iflist_mtx);
1533 list_add_tail_rcu(&sdata->list, &local->interfaces);
1534 mutex_unlock(&local->iflist_mtx);
1537 *new_wdev = &sdata->wdev;
1542 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1546 mutex_lock(&sdata->local->iflist_mtx);
1547 list_del_rcu(&sdata->list);
1548 mutex_unlock(&sdata->local->iflist_mtx);
1553 unregister_netdevice(sdata->dev);
1555 cfg80211_unregister_wdev(&sdata->wdev);
1560 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1562 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1564 ieee80211_do_stop(sdata, true);
1565 ieee80211_teardown_sdata(sdata);
1569 * Remove all interfaces, may only be called at hardware unregistration
1570 * time because it doesn't do RCU-safe list removals.
1572 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1574 struct ieee80211_sub_if_data *sdata, *tmp;
1575 LIST_HEAD(unreg_list);
1576 LIST_HEAD(wdev_list);
1580 mutex_lock(&local->iflist_mtx);
1581 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1582 list_del(&sdata->list);
1585 unregister_netdevice_queue(sdata->dev, &unreg_list);
1587 list_add(&sdata->list, &wdev_list);
1589 mutex_unlock(&local->iflist_mtx);
1590 unregister_netdevice_many(&unreg_list);
1591 list_del(&unreg_list);
1593 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1594 list_del(&sdata->list);
1595 cfg80211_unregister_wdev(&sdata->wdev);
1600 static int netdev_notify(struct notifier_block *nb,
1601 unsigned long state,
1604 struct net_device *dev = ndev;
1605 struct ieee80211_sub_if_data *sdata;
1607 if (state != NETDEV_CHANGENAME)
1610 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1613 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1616 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1618 memcpy(sdata->name, dev->name, IFNAMSIZ);
1620 ieee80211_debugfs_rename_netdev(sdata);
1624 static struct notifier_block mac80211_netdev_notifier = {
1625 .notifier_call = netdev_notify,
1628 int ieee80211_iface_init(void)
1630 return register_netdevice_notifier(&mac80211_netdev_notifier);
1633 void ieee80211_iface_exit(void)
1635 unregister_netdevice_notifier(&mac80211_netdev_notifier);