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 rcu_assign_pointer(local->monitor_sdata, sdata);
385 mutex_unlock(&local->iflist_mtx);
389 static void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
391 struct ieee80211_sub_if_data *sdata;
393 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
396 mutex_lock(&local->iflist_mtx);
398 sdata = rcu_dereference_protected(local->monitor_sdata,
399 lockdep_is_held(&local->iflist_mtx));
403 rcu_assign_pointer(local->monitor_sdata, NULL);
406 drv_remove_interface(local, sdata);
410 mutex_unlock(&local->iflist_mtx);
414 * NOTE: Be very careful when changing this function, it must NOT return
415 * an error on interface type changes that have been pre-checked, so most
416 * checks should be in ieee80211_check_concurrent_iface.
418 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
420 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
421 struct net_device *dev = wdev->netdev;
422 struct ieee80211_local *local = sdata->local;
423 struct sta_info *sta;
426 u32 hw_reconf_flags = 0;
428 switch (sdata->vif.type) {
429 case NL80211_IFTYPE_WDS:
430 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
433 case NL80211_IFTYPE_AP_VLAN: {
434 struct ieee80211_sub_if_data *master;
439 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
441 master = container_of(sdata->bss,
442 struct ieee80211_sub_if_data, u.ap);
443 sdata->control_port_protocol =
444 master->control_port_protocol;
445 sdata->control_port_no_encrypt =
446 master->control_port_no_encrypt;
449 case NL80211_IFTYPE_AP:
450 sdata->bss = &sdata->u.ap;
452 case NL80211_IFTYPE_MESH_POINT:
453 case NL80211_IFTYPE_STATION:
454 case NL80211_IFTYPE_MONITOR:
455 case NL80211_IFTYPE_ADHOC:
456 case NL80211_IFTYPE_P2P_DEVICE:
457 /* no special treatment */
459 case NL80211_IFTYPE_UNSPECIFIED:
460 case NUM_NL80211_IFTYPES:
461 case NL80211_IFTYPE_P2P_CLIENT:
462 case NL80211_IFTYPE_P2P_GO:
468 if (local->open_count == 0) {
469 res = drv_start(local);
472 if (local->ops->napi_poll)
473 napi_enable(&local->napi);
474 /* we're brought up, everything changes */
475 hw_reconf_flags = ~0;
476 ieee80211_led_radio(local, true);
477 ieee80211_mod_tpt_led_trig(local,
478 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
482 * Copy the hopefully now-present MAC address to
483 * this interface, if it has the special null one.
485 if (dev && is_zero_ether_addr(dev->dev_addr)) {
486 memcpy(dev->dev_addr,
487 local->hw.wiphy->perm_addr,
489 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
491 if (!is_valid_ether_addr(dev->dev_addr)) {
492 res = -EADDRNOTAVAIL;
497 switch (sdata->vif.type) {
498 case NL80211_IFTYPE_AP_VLAN:
499 /* no need to tell driver, but set carrier */
500 if (rtnl_dereference(sdata->bss->beacon))
501 netif_carrier_on(dev);
503 netif_carrier_off(dev);
505 case NL80211_IFTYPE_MONITOR:
506 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
507 local->cooked_mntrs++;
511 if (local->monitors == 0 && local->open_count == 0) {
512 res = ieee80211_add_virtual_monitor(local);
517 /* must be before the call to ieee80211_configure_filter */
519 if (local->monitors == 1) {
520 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
521 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
524 ieee80211_adjust_monitor_flags(sdata, 1);
525 ieee80211_configure_filter(local);
527 netif_carrier_on(dev);
531 ieee80211_del_virtual_monitor(local);
533 res = drv_add_interface(local, sdata);
536 res = ieee80211_check_queues(sdata);
538 goto err_del_interface;
541 if (sdata->vif.type == NL80211_IFTYPE_AP) {
543 local->fif_probe_req++;
545 ieee80211_configure_filter(local);
546 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
547 local->fif_probe_req++;
550 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
551 changed |= ieee80211_reset_erp_info(sdata);
552 ieee80211_bss_info_change_notify(sdata, changed);
554 switch (sdata->vif.type) {
555 case NL80211_IFTYPE_STATION:
556 case NL80211_IFTYPE_ADHOC:
557 case NL80211_IFTYPE_AP:
558 case NL80211_IFTYPE_MESH_POINT:
559 netif_carrier_off(dev);
561 case NL80211_IFTYPE_WDS:
562 case NL80211_IFTYPE_P2P_DEVICE:
565 netif_carrier_on(dev);
569 * set default queue parameters so drivers don't
570 * need to initialise the hardware if the hardware
571 * doesn't start up with sane defaults
573 ieee80211_set_wmm_default(sdata, true);
576 set_bit(SDATA_STATE_RUNNING, &sdata->state);
578 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
579 /* Create STA entry for the WDS peer */
580 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
584 goto err_del_interface;
587 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
588 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
589 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
591 res = sta_info_insert(sta);
593 /* STA has been freed */
594 goto err_del_interface;
597 rate_control_rate_init(sta);
598 netif_carrier_on(dev);
599 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
600 rcu_assign_pointer(local->p2p_sdata, sdata);
604 * set_multicast_list will be invoked by the networking core
605 * which will check whether any increments here were done in
606 * error and sync them down to the hardware as filter flags.
608 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
609 atomic_inc(&local->iff_allmultis);
611 if (sdata->flags & IEEE80211_SDATA_PROMISC)
612 atomic_inc(&local->iff_promiscs);
614 mutex_lock(&local->mtx);
615 hw_reconf_flags |= __ieee80211_recalc_idle(local);
616 mutex_unlock(&local->mtx);
622 ieee80211_hw_config(local, hw_reconf_flags);
624 ieee80211_recalc_ps(local, -1);
627 netif_tx_start_all_queues(dev);
631 drv_remove_interface(local, sdata);
633 if (!local->open_count)
637 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
638 list_del(&sdata->u.vlan.list);
639 /* might already be clear but that doesn't matter */
640 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
644 static int ieee80211_open(struct net_device *dev)
646 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
649 /* fail early if user set an invalid address */
650 if (!is_valid_ether_addr(dev->dev_addr))
651 return -EADDRNOTAVAIL;
653 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
657 return ieee80211_do_open(&sdata->wdev, true);
660 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
663 struct ieee80211_local *local = sdata->local;
665 struct sk_buff *skb, *tmp;
666 u32 hw_reconf_flags = 0;
668 enum nl80211_channel_type orig_ct;
670 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
672 if (rcu_access_pointer(local->scan_sdata) == sdata)
673 ieee80211_scan_cancel(local);
676 * Stop TX on this interface first.
679 netif_tx_stop_all_queues(sdata->dev);
681 ieee80211_roc_purge(sdata);
684 * Remove all stations associated with this interface.
686 * This must be done before calling ops->remove_interface()
687 * because otherwise we can later invoke ops->sta_notify()
688 * whenever the STAs are removed, and that invalidates driver
689 * assumptions about always getting a vif pointer that is valid
690 * (because if we remove a STA after ops->remove_interface()
691 * the driver will have removed the vif info already!)
693 * This is relevant only in AP, WDS and mesh modes, since in
694 * all other modes we've already removed all stations when
697 sta_info_flush(local, sdata);
700 * Don't count this interface for promisc/allmulti while it
701 * is down. dev_mc_unsync() will invoke set_multicast_list
702 * on the master interface which will sync these down to the
703 * hardware as filter flags.
705 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
706 atomic_dec(&local->iff_allmultis);
708 if (sdata->flags & IEEE80211_SDATA_PROMISC)
709 atomic_dec(&local->iff_promiscs);
711 if (sdata->vif.type == NL80211_IFTYPE_AP) {
713 local->fif_probe_req--;
714 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
715 local->fif_probe_req--;
719 netif_addr_lock_bh(sdata->dev);
720 spin_lock_bh(&local->filter_lock);
721 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
722 sdata->dev->addr_len);
723 spin_unlock_bh(&local->filter_lock);
724 netif_addr_unlock_bh(sdata->dev);
726 ieee80211_configure_filter(local);
729 del_timer_sync(&local->dynamic_ps_timer);
730 cancel_work_sync(&local->dynamic_ps_enable_work);
732 /* APs need special treatment */
733 if (sdata->vif.type == NL80211_IFTYPE_AP) {
734 struct ieee80211_sub_if_data *vlan, *tmpsdata;
735 struct beacon_data *old_beacon =
736 rtnl_dereference(sdata->u.ap.beacon);
737 struct probe_resp *old_probe_resp =
738 rtnl_dereference(sdata->u.ap.probe_resp);
740 /* sdata_running will return false, so this will disable */
741 ieee80211_bss_info_change_notify(sdata,
742 BSS_CHANGED_BEACON_ENABLED);
744 /* remove beacon and probe response */
745 RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);
746 RCU_INIT_POINTER(sdata->u.ap.probe_resp, NULL);
749 kfree(old_probe_resp);
751 /* down all dependent devices, that is VLANs */
752 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
754 dev_close(vlan->dev);
755 WARN_ON(!list_empty(&sdata->u.ap.vlans));
757 /* free all potentially still buffered bcast frames */
758 local->total_ps_buffered -= skb_queue_len(&sdata->u.ap.ps_bc_buf);
759 skb_queue_purge(&sdata->u.ap.ps_bc_buf);
760 } else if (sdata->vif.type == NL80211_IFTYPE_STATION) {
761 ieee80211_mgd_stop(sdata);
767 switch (sdata->vif.type) {
768 case NL80211_IFTYPE_AP_VLAN:
769 list_del(&sdata->u.vlan.list);
770 /* no need to tell driver */
772 case NL80211_IFTYPE_MONITOR:
773 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
774 local->cooked_mntrs--;
779 if (local->monitors == 0) {
780 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
781 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
782 ieee80211_del_virtual_monitor(local);
785 ieee80211_adjust_monitor_flags(sdata, -1);
786 ieee80211_configure_filter(local);
788 case NL80211_IFTYPE_P2P_DEVICE:
789 /* relies on synchronize_rcu() below */
790 rcu_assign_pointer(local->p2p_sdata, NULL);
793 flush_work(&sdata->work);
795 * When we get here, the interface is marked down.
796 * Call rcu_barrier() to wait both for the RX path
797 * should it be using the interface and enqueuing
798 * frames at this very time on another CPU, and
799 * for the sta free call_rcu callbacks.
804 * free_sta_rcu() enqueues a work for the actual
805 * sta cleanup, so we need to flush it while
806 * sdata is still valid.
808 flush_workqueue(local->workqueue);
810 skb_queue_purge(&sdata->skb_queue);
813 * Free all remaining keys, there shouldn't be any,
814 * except maybe group keys in AP more or WDS?
816 ieee80211_free_keys(sdata);
819 drv_remove_interface(local, sdata);
824 mutex_lock(&local->mtx);
825 hw_reconf_flags |= __ieee80211_recalc_idle(local);
826 mutex_unlock(&local->mtx);
828 ieee80211_recalc_ps(local, -1);
830 if (local->open_count == 0) {
831 if (local->ops->napi_poll)
832 napi_disable(&local->napi);
833 ieee80211_clear_tx_pending(local);
834 ieee80211_stop_device(local);
836 /* no reconfiguring after stop! */
840 /* Re-calculate channel-type, in case there are multiple vifs
841 * on different channel types.
843 orig_ct = local->_oper_channel_type;
844 ieee80211_set_channel_type(local, NULL, NL80211_CHAN_NO_HT);
846 /* do after stop to avoid reconfiguring when we stop anyway */
847 if (hw_reconf_flags || (orig_ct != local->_oper_channel_type))
848 ieee80211_hw_config(local, hw_reconf_flags);
850 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
851 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
852 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
853 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
854 if (info->control.vif == &sdata->vif) {
855 __skb_unlink(skb, &local->pending[i]);
856 dev_kfree_skb_irq(skb);
860 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
862 if (local->monitors == local->open_count && local->monitors > 0)
863 ieee80211_add_virtual_monitor(local);
866 static int ieee80211_stop(struct net_device *dev)
868 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
870 ieee80211_do_stop(sdata, true);
875 static void ieee80211_set_multicast_list(struct net_device *dev)
877 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
878 struct ieee80211_local *local = sdata->local;
879 int allmulti, promisc, sdata_allmulti, sdata_promisc;
881 allmulti = !!(dev->flags & IFF_ALLMULTI);
882 promisc = !!(dev->flags & IFF_PROMISC);
883 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
884 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
886 if (allmulti != sdata_allmulti) {
887 if (dev->flags & IFF_ALLMULTI)
888 atomic_inc(&local->iff_allmultis);
890 atomic_dec(&local->iff_allmultis);
891 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
894 if (promisc != sdata_promisc) {
895 if (dev->flags & IFF_PROMISC)
896 atomic_inc(&local->iff_promiscs);
898 atomic_dec(&local->iff_promiscs);
899 sdata->flags ^= IEEE80211_SDATA_PROMISC;
901 spin_lock_bh(&local->filter_lock);
902 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
903 spin_unlock_bh(&local->filter_lock);
904 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
908 * Called when the netdev is removed or, by the code below, before
909 * the interface type changes.
911 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
913 struct ieee80211_local *local = sdata->local;
917 /* free extra data */
918 ieee80211_free_keys(sdata);
920 ieee80211_debugfs_remove_netdev(sdata);
922 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
923 __skb_queue_purge(&sdata->fragments[i].skb_list);
924 sdata->fragment_next = 0;
926 if (ieee80211_vif_is_mesh(&sdata->vif))
927 mesh_rmc_free(sdata);
929 flushed = sta_info_flush(local, sdata);
933 static void ieee80211_uninit(struct net_device *dev)
935 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
938 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
941 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
944 static const struct net_device_ops ieee80211_dataif_ops = {
945 .ndo_open = ieee80211_open,
946 .ndo_stop = ieee80211_stop,
947 .ndo_uninit = ieee80211_uninit,
948 .ndo_start_xmit = ieee80211_subif_start_xmit,
949 .ndo_set_rx_mode = ieee80211_set_multicast_list,
950 .ndo_change_mtu = ieee80211_change_mtu,
951 .ndo_set_mac_address = ieee80211_change_mac,
952 .ndo_select_queue = ieee80211_netdev_select_queue,
955 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
958 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
959 struct ieee80211_local *local = sdata->local;
960 struct ieee80211_hdr *hdr;
961 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
963 if (local->hw.queues < IEEE80211_NUM_ACS)
967 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
968 return 0; /* doesn't matter, frame will be dropped */
970 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
972 return ieee80211_select_queue_80211(sdata, skb, hdr);
975 static const struct net_device_ops ieee80211_monitorif_ops = {
976 .ndo_open = ieee80211_open,
977 .ndo_stop = ieee80211_stop,
978 .ndo_uninit = ieee80211_uninit,
979 .ndo_start_xmit = ieee80211_monitor_start_xmit,
980 .ndo_set_rx_mode = ieee80211_set_multicast_list,
981 .ndo_change_mtu = ieee80211_change_mtu,
982 .ndo_set_mac_address = eth_mac_addr,
983 .ndo_select_queue = ieee80211_monitor_select_queue,
986 static void ieee80211_if_setup(struct net_device *dev)
989 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
990 dev->netdev_ops = &ieee80211_dataif_ops;
991 dev->destructor = free_netdev;
994 static void ieee80211_iface_work(struct work_struct *work)
996 struct ieee80211_sub_if_data *sdata =
997 container_of(work, struct ieee80211_sub_if_data, work);
998 struct ieee80211_local *local = sdata->local;
1000 struct sta_info *sta;
1001 struct ieee80211_ra_tid *ra_tid;
1003 if (!ieee80211_sdata_running(sdata))
1006 if (local->scanning)
1010 * ieee80211_queue_work() should have picked up most cases,
1011 * here we'll pick the rest.
1013 if (WARN(local->suspended,
1014 "interface work scheduled while going to suspend\n"))
1017 /* first process frames */
1018 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1019 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1021 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1022 ra_tid = (void *)&skb->cb;
1023 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1025 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1026 ra_tid = (void *)&skb->cb;
1027 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1029 } else if (ieee80211_is_action(mgmt->frame_control) &&
1030 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1033 mutex_lock(&local->sta_mtx);
1034 sta = sta_info_get_bss(sdata, mgmt->sa);
1036 switch (mgmt->u.action.u.addba_req.action_code) {
1037 case WLAN_ACTION_ADDBA_REQ:
1038 ieee80211_process_addba_request(
1039 local, sta, mgmt, len);
1041 case WLAN_ACTION_ADDBA_RESP:
1042 ieee80211_process_addba_resp(local, sta,
1045 case WLAN_ACTION_DELBA:
1046 ieee80211_process_delba(sdata, sta,
1054 mutex_unlock(&local->sta_mtx);
1055 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1056 struct ieee80211_hdr *hdr = (void *)mgmt;
1058 * So the frame isn't mgmt, but frame_control
1059 * is at the right place anyway, of course, so
1060 * the if statement is correct.
1062 * Warn if we have other data frame types here,
1063 * they must not get here.
1065 WARN_ON(hdr->frame_control &
1066 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1067 WARN_ON(!(hdr->seq_ctrl &
1068 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1070 * This was a fragment of a frame, received while
1071 * a block-ack session was active. That cannot be
1072 * right, so terminate the session.
1074 mutex_lock(&local->sta_mtx);
1075 sta = sta_info_get_bss(sdata, mgmt->sa);
1077 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1078 IEEE80211_QOS_CTL_TID_MASK;
1080 __ieee80211_stop_rx_ba_session(
1081 sta, tid, WLAN_BACK_RECIPIENT,
1082 WLAN_REASON_QSTA_REQUIRE_SETUP,
1085 mutex_unlock(&local->sta_mtx);
1086 } else switch (sdata->vif.type) {
1087 case NL80211_IFTYPE_STATION:
1088 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1090 case NL80211_IFTYPE_ADHOC:
1091 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1093 case NL80211_IFTYPE_MESH_POINT:
1094 if (!ieee80211_vif_is_mesh(&sdata->vif))
1096 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1099 WARN(1, "frame for unexpected interface type");
1106 /* then other type-dependent work */
1107 switch (sdata->vif.type) {
1108 case NL80211_IFTYPE_STATION:
1109 ieee80211_sta_work(sdata);
1111 case NL80211_IFTYPE_ADHOC:
1112 ieee80211_ibss_work(sdata);
1114 case NL80211_IFTYPE_MESH_POINT:
1115 if (!ieee80211_vif_is_mesh(&sdata->vif))
1117 ieee80211_mesh_work(sdata);
1126 * Helper function to initialise an interface to a specific type.
1128 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1129 enum nl80211_iftype type)
1131 /* clear type-dependent union */
1132 memset(&sdata->u, 0, sizeof(sdata->u));
1134 /* and set some type-dependent values */
1135 sdata->vif.type = type;
1136 sdata->vif.p2p = false;
1137 sdata->wdev.iftype = type;
1139 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1140 sdata->control_port_no_encrypt = false;
1142 sdata->noack_map = 0;
1144 /* only monitor/p2p-device differ */
1146 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1147 sdata->dev->type = ARPHRD_ETHER;
1150 skb_queue_head_init(&sdata->skb_queue);
1151 INIT_WORK(&sdata->work, ieee80211_iface_work);
1154 case NL80211_IFTYPE_P2P_GO:
1155 type = NL80211_IFTYPE_AP;
1156 sdata->vif.type = type;
1157 sdata->vif.p2p = true;
1159 case NL80211_IFTYPE_AP:
1160 skb_queue_head_init(&sdata->u.ap.ps_bc_buf);
1161 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1163 case NL80211_IFTYPE_P2P_CLIENT:
1164 type = NL80211_IFTYPE_STATION;
1165 sdata->vif.type = type;
1166 sdata->vif.p2p = true;
1168 case NL80211_IFTYPE_STATION:
1169 ieee80211_sta_setup_sdata(sdata);
1171 case NL80211_IFTYPE_ADHOC:
1172 ieee80211_ibss_setup_sdata(sdata);
1174 case NL80211_IFTYPE_MESH_POINT:
1175 if (ieee80211_vif_is_mesh(&sdata->vif))
1176 ieee80211_mesh_init_sdata(sdata);
1178 case NL80211_IFTYPE_MONITOR:
1179 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1180 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1181 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1182 MONITOR_FLAG_OTHER_BSS;
1184 case NL80211_IFTYPE_WDS:
1185 case NL80211_IFTYPE_AP_VLAN:
1186 case NL80211_IFTYPE_P2P_DEVICE:
1188 case NL80211_IFTYPE_UNSPECIFIED:
1189 case NUM_NL80211_IFTYPES:
1194 ieee80211_debugfs_add_netdev(sdata);
1197 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1198 enum nl80211_iftype type)
1200 struct ieee80211_local *local = sdata->local;
1202 enum nl80211_iftype internal_type = type;
1207 if (!local->ops->change_interface)
1210 switch (sdata->vif.type) {
1211 case NL80211_IFTYPE_AP:
1212 case NL80211_IFTYPE_STATION:
1213 case NL80211_IFTYPE_ADHOC:
1215 * Could maybe also all others here?
1216 * Just not sure how that interacts
1217 * with the RX/config path e.g. for
1226 case NL80211_IFTYPE_AP:
1227 case NL80211_IFTYPE_STATION:
1228 case NL80211_IFTYPE_ADHOC:
1230 * Could probably support everything
1231 * but WDS here (WDS do_open can fail
1232 * under memory pressure, which this
1233 * code isn't prepared to handle).
1236 case NL80211_IFTYPE_P2P_CLIENT:
1238 internal_type = NL80211_IFTYPE_STATION;
1240 case NL80211_IFTYPE_P2P_GO:
1242 internal_type = NL80211_IFTYPE_AP;
1248 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1252 ieee80211_do_stop(sdata, false);
1254 ieee80211_teardown_sdata(sdata);
1256 ret = drv_change_interface(local, sdata, internal_type, p2p);
1258 type = sdata->vif.type;
1261 * Ignore return value here, there's not much we can do since
1262 * the driver changed the interface type internally already.
1263 * The warnings will hopefully make driver authors fix it :-)
1265 ieee80211_check_queues(sdata);
1267 ieee80211_setup_sdata(sdata, type);
1269 err = ieee80211_do_open(&sdata->wdev, false);
1270 WARN(err, "type change: do_open returned %d", err);
1275 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1276 enum nl80211_iftype type)
1282 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1285 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
1286 if (sdata->local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS &&
1287 type == NL80211_IFTYPE_ADHOC)
1290 if (ieee80211_sdata_running(sdata)) {
1291 ret = ieee80211_runtime_change_iftype(sdata, type);
1295 /* Purge and reset type-dependent state. */
1296 ieee80211_teardown_sdata(sdata);
1297 ieee80211_setup_sdata(sdata, type);
1300 /* reset some values that shouldn't be kept across type changes */
1301 sdata->vif.bss_conf.basic_rates =
1302 ieee80211_mandatory_rates(sdata->local,
1303 sdata->local->oper_channel->band);
1304 sdata->drop_unencrypted = 0;
1305 if (type == NL80211_IFTYPE_STATION)
1306 sdata->u.mgd.use_4addr = false;
1311 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1312 u8 *perm_addr, enum nl80211_iftype type)
1314 struct ieee80211_sub_if_data *sdata;
1315 u64 mask, start, addr, val, inc;
1317 u8 tmp_addr[ETH_ALEN];
1320 /* default ... something at least */
1321 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1323 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1324 local->hw.wiphy->n_addresses <= 1)
1327 mutex_lock(&local->iflist_mtx);
1330 case NL80211_IFTYPE_MONITOR:
1331 /* doesn't matter */
1333 case NL80211_IFTYPE_WDS:
1334 case NL80211_IFTYPE_AP_VLAN:
1335 /* match up with an AP interface */
1336 list_for_each_entry(sdata, &local->interfaces, list) {
1337 if (sdata->vif.type != NL80211_IFTYPE_AP)
1339 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1342 /* keep default if no AP interface present */
1344 case NL80211_IFTYPE_P2P_CLIENT:
1345 case NL80211_IFTYPE_P2P_GO:
1346 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1347 list_for_each_entry(sdata, &local->interfaces, list) {
1348 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1350 if (!ieee80211_sdata_running(sdata))
1352 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1356 /* otherwise fall through */
1358 /* assign a new address if possible -- try n_addresses first */
1359 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1362 list_for_each_entry(sdata, &local->interfaces, list) {
1363 if (memcmp(local->hw.wiphy->addresses[i].addr,
1364 sdata->vif.addr, ETH_ALEN) == 0) {
1372 local->hw.wiphy->addresses[i].addr,
1378 /* try mask if available */
1379 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1382 m = local->hw.wiphy->addr_mask;
1383 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1384 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1385 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1387 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1388 /* not a contiguous mask ... not handled now! */
1389 pr_info("not contiguous\n");
1393 m = local->hw.wiphy->perm_addr;
1394 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1395 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1396 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1398 inc = 1ULL<<__ffs64(mask);
1399 val = (start & mask);
1400 addr = (start & ~mask) | (val & mask);
1404 tmp_addr[5] = addr >> 0*8;
1405 tmp_addr[4] = addr >> 1*8;
1406 tmp_addr[3] = addr >> 2*8;
1407 tmp_addr[2] = addr >> 3*8;
1408 tmp_addr[1] = addr >> 4*8;
1409 tmp_addr[0] = addr >> 5*8;
1413 list_for_each_entry(sdata, &local->interfaces, list) {
1414 if (memcmp(tmp_addr, sdata->vif.addr,
1422 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1425 addr = (start & ~mask) | (val & mask);
1426 } while (addr != start);
1432 mutex_unlock(&local->iflist_mtx);
1435 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1436 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1437 struct vif_params *params)
1439 struct net_device *ndev = NULL;
1440 struct ieee80211_sub_if_data *sdata = NULL;
1446 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1447 struct wireless_dev *wdev;
1449 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1453 wdev = &sdata->wdev;
1456 strlcpy(sdata->name, name, IFNAMSIZ);
1457 ieee80211_assign_perm_addr(local, wdev->address, type);
1458 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1460 if (local->hw.queues >= IEEE80211_NUM_ACS)
1461 txqs = IEEE80211_NUM_ACS;
1463 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1464 local->hw.vif_data_size,
1465 name, ieee80211_if_setup, txqs, 1);
1468 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1470 ndev->needed_headroom = local->tx_headroom +
1471 4*6 /* four MAC addresses */
1472 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1474 + 8 /* rfc1042/bridge tunnel */
1475 - ETH_HLEN /* ethernet hard_header_len */
1476 + IEEE80211_ENCRYPT_HEADROOM;
1477 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1479 ret = dev_alloc_name(ndev, ndev->name);
1485 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1486 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1487 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1489 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1490 sdata = netdev_priv(ndev);
1491 ndev->ieee80211_ptr = &sdata->wdev;
1492 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1493 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1498 /* initialise type-independent data */
1499 sdata->wdev.wiphy = local->hw.wiphy;
1500 sdata->local = local;
1502 sdata->arp_filter_state = true;
1505 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1506 skb_queue_head_init(&sdata->fragments[i].skb_list);
1508 INIT_LIST_HEAD(&sdata->key_list);
1510 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1511 struct ieee80211_supported_band *sband;
1512 sband = local->hw.wiphy->bands[i];
1513 sdata->rc_rateidx_mask[i] =
1514 sband ? (1 << sband->n_bitrates) - 1 : 0;
1516 memcpy(sdata->rc_rateidx_mcs_mask[i],
1517 sband->ht_cap.mcs.rx_mask,
1518 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1520 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1521 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1524 ieee80211_set_default_queues(sdata);
1526 /* setup type-dependent data */
1527 ieee80211_setup_sdata(sdata, type);
1531 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1532 if (type == NL80211_IFTYPE_STATION)
1533 sdata->u.mgd.use_4addr = params->use_4addr;
1536 ndev->features |= local->hw.netdev_features;
1538 ret = register_netdevice(ndev);
1545 mutex_lock(&local->iflist_mtx);
1546 list_add_tail_rcu(&sdata->list, &local->interfaces);
1547 mutex_unlock(&local->iflist_mtx);
1550 *new_wdev = &sdata->wdev;
1555 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1559 mutex_lock(&sdata->local->iflist_mtx);
1560 list_del_rcu(&sdata->list);
1561 mutex_unlock(&sdata->local->iflist_mtx);
1566 unregister_netdevice(sdata->dev);
1568 cfg80211_unregister_wdev(&sdata->wdev);
1573 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1575 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1577 ieee80211_do_stop(sdata, true);
1578 ieee80211_teardown_sdata(sdata);
1582 * Remove all interfaces, may only be called at hardware unregistration
1583 * time because it doesn't do RCU-safe list removals.
1585 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1587 struct ieee80211_sub_if_data *sdata, *tmp;
1588 LIST_HEAD(unreg_list);
1589 LIST_HEAD(wdev_list);
1593 mutex_lock(&local->iflist_mtx);
1594 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1595 list_del(&sdata->list);
1598 unregister_netdevice_queue(sdata->dev, &unreg_list);
1600 list_add(&sdata->list, &wdev_list);
1602 mutex_unlock(&local->iflist_mtx);
1603 unregister_netdevice_many(&unreg_list);
1604 list_del(&unreg_list);
1606 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1607 list_del(&sdata->list);
1608 cfg80211_unregister_wdev(&sdata->wdev);
1613 static int netdev_notify(struct notifier_block *nb,
1614 unsigned long state,
1617 struct net_device *dev = ndev;
1618 struct ieee80211_sub_if_data *sdata;
1620 if (state != NETDEV_CHANGENAME)
1623 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1626 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1629 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1631 memcpy(sdata->name, dev->name, IFNAMSIZ);
1633 ieee80211_debugfs_rename_netdev(sdata);
1637 static struct notifier_block mac80211_netdev_notifier = {
1638 .notifier_call = netdev_notify,
1641 int ieee80211_iface_init(void)
1643 return register_netdevice_notifier(&mac80211_netdev_notifier);
1646 void ieee80211_iface_exit(void)
1648 unregister_netdevice_notifier(&mac80211_netdev_notifier);