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.
45 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
47 struct ieee80211_chanctx_conf *chanctx_conf;
51 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
57 power = chanctx_conf->def.chan->max_power;
60 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
61 power = min(power, sdata->user_power_level);
63 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
64 power = min(power, sdata->ap_power_level);
66 if (power != sdata->vif.bss_conf.txpower) {
67 sdata->vif.bss_conf.txpower = power;
68 ieee80211_hw_config(sdata->local, 0);
75 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
77 if (__ieee80211_recalc_txpower(sdata))
78 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
81 static u32 __ieee80211_idle_off(struct ieee80211_local *local)
83 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
86 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
87 return IEEE80211_CONF_CHANGE_IDLE;
90 static u32 __ieee80211_idle_on(struct ieee80211_local *local)
92 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
95 ieee80211_flush_queues(local, NULL);
97 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
98 return IEEE80211_CONF_CHANGE_IDLE;
101 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
104 bool working = false, scanning, active;
105 unsigned int led_trig_start = 0, led_trig_stop = 0;
106 struct ieee80211_roc_work *roc;
108 lockdep_assert_held(&local->mtx);
110 active = force_active ||
111 !list_empty(&local->chanctx_list) ||
114 if (!local->ops->remain_on_channel) {
115 list_for_each_entry(roc, &local->roc_list, list) {
121 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
122 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
124 if (working || scanning)
125 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
127 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
130 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
132 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
134 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
136 if (working || scanning || active)
137 return __ieee80211_idle_off(local);
138 return __ieee80211_idle_on(local);
141 u32 ieee80211_idle_off(struct ieee80211_local *local)
143 return __ieee80211_recalc_idle(local, true);
146 void ieee80211_recalc_idle(struct ieee80211_local *local)
148 u32 change = __ieee80211_recalc_idle(local, false);
150 ieee80211_hw_config(local, change);
153 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
155 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
162 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr)
164 struct ieee80211_local *local = sdata->local;
165 struct ieee80211_sub_if_data *iter;
170 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
174 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
175 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
176 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
178 m = local->hw.wiphy->addr_mask;
179 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
180 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
181 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
184 mutex_lock(&local->iflist_mtx);
185 list_for_each_entry(iter, &local->interfaces, list) {
189 if (iter->vif.type == NL80211_IFTYPE_MONITOR)
193 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
194 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
195 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
197 if ((new & ~mask) != (tmp & ~mask)) {
202 mutex_unlock(&local->iflist_mtx);
207 static int ieee80211_change_mac(struct net_device *dev, void *addr)
209 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
210 struct sockaddr *sa = addr;
213 if (ieee80211_sdata_running(sdata))
216 ret = ieee80211_verify_mac(sdata, sa->sa_data);
220 ret = eth_mac_addr(dev, sa);
223 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
228 static inline int identical_mac_addr_allowed(int type1, int type2)
230 return type1 == NL80211_IFTYPE_MONITOR ||
231 type2 == NL80211_IFTYPE_MONITOR ||
232 type1 == NL80211_IFTYPE_P2P_DEVICE ||
233 type2 == NL80211_IFTYPE_P2P_DEVICE ||
234 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
235 (type1 == NL80211_IFTYPE_WDS &&
236 (type2 == NL80211_IFTYPE_WDS ||
237 type2 == NL80211_IFTYPE_AP)) ||
238 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
239 (type1 == NL80211_IFTYPE_AP_VLAN &&
240 (type2 == NL80211_IFTYPE_AP ||
241 type2 == NL80211_IFTYPE_AP_VLAN));
244 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
245 enum nl80211_iftype iftype)
247 struct ieee80211_local *local = sdata->local;
248 struct ieee80211_sub_if_data *nsdata;
252 /* we hold the RTNL here so can safely walk the list */
253 list_for_each_entry(nsdata, &local->interfaces, list) {
254 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
256 * Allow only a single IBSS interface to be up at any
257 * time. This is restricted because beacon distribution
258 * cannot work properly if both are in the same IBSS.
260 * To remove this restriction we'd have to disallow them
261 * from setting the same SSID on different IBSS interfaces
262 * belonging to the same hardware. Then, however, we're
263 * faced with having to adopt two different TSF timers...
265 if (iftype == NL80211_IFTYPE_ADHOC &&
266 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
270 * The remaining checks are only performed for interfaces
271 * with the same MAC address.
273 if (!ether_addr_equal(sdata->vif.addr,
278 * check whether it may have the same address
280 if (!identical_mac_addr_allowed(iftype,
285 * can only add VLANs to enabled APs
287 if (iftype == NL80211_IFTYPE_AP_VLAN &&
288 nsdata->vif.type == NL80211_IFTYPE_AP)
289 sdata->bss = &nsdata->u.ap;
296 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata)
298 int n_queues = sdata->local->hw.queues;
301 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
302 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
303 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
304 IEEE80211_INVAL_HW_QUEUE))
306 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
312 if ((sdata->vif.type != NL80211_IFTYPE_AP &&
313 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) ||
314 !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
315 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
319 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
322 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
328 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
331 struct ieee80211_local *local = sdata->local;
332 u32 flags = sdata->u.mntr_flags;
334 #define ADJUST(_f, _s) do { \
335 if (flags & MONITOR_FLAG_##_f) \
336 local->fif_##_s += offset; \
339 ADJUST(FCSFAIL, fcsfail);
340 ADJUST(PLCPFAIL, plcpfail);
341 ADJUST(CONTROL, control);
342 ADJUST(CONTROL, pspoll);
343 ADJUST(OTHER_BSS, other_bss);
348 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
350 struct ieee80211_local *local = sdata->local;
353 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
354 if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
355 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
356 else if (local->hw.queues >= IEEE80211_NUM_ACS)
357 sdata->vif.hw_queue[i] = i;
359 sdata->vif.hw_queue[i] = 0;
361 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
364 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
366 struct ieee80211_sub_if_data *sdata;
369 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
374 if (local->monitor_sdata)
377 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
382 sdata->local = local;
383 sdata->vif.type = NL80211_IFTYPE_MONITOR;
384 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
385 wiphy_name(local->hw.wiphy));
387 ieee80211_set_default_queues(sdata);
389 ret = drv_add_interface(local, sdata);
391 /* ok .. stupid driver, it asked for this! */
396 ret = ieee80211_check_queues(sdata);
402 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
403 IEEE80211_CHANCTX_EXCLUSIVE);
405 drv_remove_interface(local, sdata);
410 mutex_lock(&local->iflist_mtx);
411 rcu_assign_pointer(local->monitor_sdata, sdata);
412 mutex_unlock(&local->iflist_mtx);
417 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
419 struct ieee80211_sub_if_data *sdata;
421 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
426 mutex_lock(&local->iflist_mtx);
428 sdata = rcu_dereference_protected(local->monitor_sdata,
429 lockdep_is_held(&local->iflist_mtx));
431 mutex_unlock(&local->iflist_mtx);
435 rcu_assign_pointer(local->monitor_sdata, NULL);
436 mutex_unlock(&local->iflist_mtx);
440 ieee80211_vif_release_channel(sdata);
442 drv_remove_interface(local, sdata);
448 * NOTE: Be very careful when changing this function, it must NOT return
449 * an error on interface type changes that have been pre-checked, so most
450 * checks should be in ieee80211_check_concurrent_iface.
452 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
454 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
455 struct net_device *dev = wdev->netdev;
456 struct ieee80211_local *local = sdata->local;
457 struct sta_info *sta;
460 u32 hw_reconf_flags = 0;
462 switch (sdata->vif.type) {
463 case NL80211_IFTYPE_WDS:
464 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
467 case NL80211_IFTYPE_AP_VLAN: {
468 struct ieee80211_sub_if_data *master;
473 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
475 master = container_of(sdata->bss,
476 struct ieee80211_sub_if_data, u.ap);
477 sdata->control_port_protocol =
478 master->control_port_protocol;
479 sdata->control_port_no_encrypt =
480 master->control_port_no_encrypt;
481 sdata->vif.cab_queue = master->vif.cab_queue;
482 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
483 sizeof(sdata->vif.hw_queue));
486 case NL80211_IFTYPE_AP:
487 sdata->bss = &sdata->u.ap;
489 case NL80211_IFTYPE_MESH_POINT:
490 case NL80211_IFTYPE_STATION:
491 case NL80211_IFTYPE_MONITOR:
492 case NL80211_IFTYPE_ADHOC:
493 case NL80211_IFTYPE_P2P_DEVICE:
494 /* no special treatment */
496 case NL80211_IFTYPE_UNSPECIFIED:
497 case NUM_NL80211_IFTYPES:
498 case NL80211_IFTYPE_P2P_CLIENT:
499 case NL80211_IFTYPE_P2P_GO:
505 if (local->open_count == 0) {
506 res = drv_start(local);
509 /* we're brought up, everything changes */
510 hw_reconf_flags = ~0;
511 ieee80211_led_radio(local, true);
512 ieee80211_mod_tpt_led_trig(local,
513 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
517 * Copy the hopefully now-present MAC address to
518 * this interface, if it has the special null one.
520 if (dev && is_zero_ether_addr(dev->dev_addr)) {
521 memcpy(dev->dev_addr,
522 local->hw.wiphy->perm_addr,
524 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
526 if (!is_valid_ether_addr(dev->dev_addr)) {
527 res = -EADDRNOTAVAIL;
532 switch (sdata->vif.type) {
533 case NL80211_IFTYPE_AP_VLAN:
534 /* no need to tell driver, but set carrier and chanctx */
535 if (rtnl_dereference(sdata->bss->beacon)) {
536 ieee80211_vif_vlan_copy_chanctx(sdata);
537 netif_carrier_on(dev);
539 netif_carrier_off(dev);
542 case NL80211_IFTYPE_MONITOR:
543 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
544 local->cooked_mntrs++;
548 if (local->monitors == 0 && local->open_count == 0) {
549 res = ieee80211_add_virtual_monitor(local);
554 /* must be before the call to ieee80211_configure_filter */
556 if (local->monitors == 1) {
557 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
558 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
561 ieee80211_adjust_monitor_flags(sdata, 1);
562 ieee80211_configure_filter(local);
563 mutex_lock(&local->mtx);
564 ieee80211_recalc_idle(local);
565 mutex_unlock(&local->mtx);
567 netif_carrier_on(dev);
571 ieee80211_del_virtual_monitor(local);
573 res = drv_add_interface(local, sdata);
576 res = ieee80211_check_queues(sdata);
578 goto err_del_interface;
581 if (sdata->vif.type == NL80211_IFTYPE_AP) {
583 local->fif_probe_req++;
585 ieee80211_configure_filter(local);
586 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
587 local->fif_probe_req++;
590 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
591 changed |= ieee80211_reset_erp_info(sdata);
592 ieee80211_bss_info_change_notify(sdata, changed);
594 switch (sdata->vif.type) {
595 case NL80211_IFTYPE_STATION:
596 case NL80211_IFTYPE_ADHOC:
597 case NL80211_IFTYPE_AP:
598 case NL80211_IFTYPE_MESH_POINT:
599 netif_carrier_off(dev);
601 case NL80211_IFTYPE_WDS:
602 case NL80211_IFTYPE_P2P_DEVICE:
610 * set default queue parameters so drivers don't
611 * need to initialise the hardware if the hardware
612 * doesn't start up with sane defaults
614 ieee80211_set_wmm_default(sdata, true);
617 set_bit(SDATA_STATE_RUNNING, &sdata->state);
619 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
620 /* Create STA entry for the WDS peer */
621 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
625 goto err_del_interface;
628 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
629 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
630 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
632 res = sta_info_insert(sta);
634 /* STA has been freed */
635 goto err_del_interface;
638 rate_control_rate_init(sta);
639 netif_carrier_on(dev);
640 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
641 rcu_assign_pointer(local->p2p_sdata, sdata);
645 * set_multicast_list will be invoked by the networking core
646 * which will check whether any increments here were done in
647 * error and sync them down to the hardware as filter flags.
649 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
650 atomic_inc(&local->iff_allmultis);
652 if (sdata->flags & IEEE80211_SDATA_PROMISC)
653 atomic_inc(&local->iff_promiscs);
659 ieee80211_hw_config(local, hw_reconf_flags);
661 ieee80211_recalc_ps(local, -1);
663 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
664 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
665 /* XXX: for AP_VLAN, actually track AP queues */
666 netif_tx_start_all_queues(dev);
669 int n_acs = IEEE80211_NUM_ACS;
672 if (local->hw.queues < IEEE80211_NUM_ACS)
675 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
676 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
677 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
678 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
679 for (ac = 0; ac < n_acs; ac++) {
680 int ac_queue = sdata->vif.hw_queue[ac];
682 if (local->queue_stop_reasons[ac_queue] == 0 &&
683 skb_queue_empty(&local->pending[ac_queue]))
684 netif_start_subqueue(dev, ac);
687 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
692 drv_remove_interface(local, sdata);
694 if (!local->open_count)
698 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
699 list_del(&sdata->u.vlan.list);
700 /* might already be clear but that doesn't matter */
701 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
705 static int ieee80211_open(struct net_device *dev)
707 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
710 /* fail early if user set an invalid address */
711 if (!is_valid_ether_addr(dev->dev_addr))
712 return -EADDRNOTAVAIL;
714 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
718 return ieee80211_do_open(&sdata->wdev, true);
721 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
724 struct ieee80211_local *local = sdata->local;
726 struct sk_buff *skb, *tmp;
727 u32 hw_reconf_flags = 0;
731 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
733 if (rcu_access_pointer(local->scan_sdata) == sdata)
734 ieee80211_scan_cancel(local);
737 * Stop TX on this interface first.
740 netif_tx_stop_all_queues(sdata->dev);
742 ieee80211_roc_purge(local, sdata);
744 if (sdata->vif.type == NL80211_IFTYPE_STATION)
745 ieee80211_mgd_stop(sdata);
748 * Remove all stations associated with this interface.
750 * This must be done before calling ops->remove_interface()
751 * because otherwise we can later invoke ops->sta_notify()
752 * whenever the STAs are removed, and that invalidates driver
753 * assumptions about always getting a vif pointer that is valid
754 * (because if we remove a STA after ops->remove_interface()
755 * the driver will have removed the vif info already!)
757 * This is relevant only in WDS mode, in all other modes we've
758 * already removed all stations when disconnecting or similar,
761 * We call sta_info_flush_cleanup() later, to combine RCU waits.
763 flushed = sta_info_flush_defer(sdata);
764 WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
765 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
767 /* don't count this interface for promisc/allmulti while it is down */
768 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
769 atomic_dec(&local->iff_allmultis);
771 if (sdata->flags & IEEE80211_SDATA_PROMISC)
772 atomic_dec(&local->iff_promiscs);
774 if (sdata->vif.type == NL80211_IFTYPE_AP) {
776 local->fif_probe_req--;
777 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
778 local->fif_probe_req--;
782 netif_addr_lock_bh(sdata->dev);
783 spin_lock_bh(&local->filter_lock);
784 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
785 sdata->dev->addr_len);
786 spin_unlock_bh(&local->filter_lock);
787 netif_addr_unlock_bh(sdata->dev);
790 del_timer_sync(&local->dynamic_ps_timer);
791 cancel_work_sync(&local->dynamic_ps_enable_work);
793 cancel_work_sync(&sdata->recalc_smps);
795 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
797 if (sdata->wdev.cac_started) {
798 WARN_ON(local->suspended);
799 mutex_lock(&local->iflist_mtx);
800 ieee80211_vif_release_channel(sdata);
801 mutex_unlock(&local->iflist_mtx);
802 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_ABORTED,
806 /* APs need special treatment */
807 if (sdata->vif.type == NL80211_IFTYPE_AP) {
808 struct ieee80211_sub_if_data *vlan, *tmpsdata;
810 /* down all dependent devices, that is VLANs */
811 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
813 dev_close(vlan->dev);
814 WARN_ON(!list_empty(&sdata->u.ap.vlans));
815 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
816 /* remove all packets in parent bc_buf pointing to this dev */
817 ps = &sdata->bss->ps;
819 spin_lock_irqsave(&ps->bc_buf.lock, flags);
820 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
821 if (skb->dev == sdata->dev) {
822 __skb_unlink(skb, &ps->bc_buf);
823 local->total_ps_buffered--;
824 ieee80211_free_txskb(&local->hw, skb);
827 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
833 switch (sdata->vif.type) {
834 case NL80211_IFTYPE_AP_VLAN:
835 list_del(&sdata->u.vlan.list);
836 rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
837 /* no need to tell driver */
839 case NL80211_IFTYPE_MONITOR:
840 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
841 local->cooked_mntrs--;
846 if (local->monitors == 0) {
847 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
848 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
851 ieee80211_adjust_monitor_flags(sdata, -1);
853 case NL80211_IFTYPE_P2P_DEVICE:
854 /* relies on synchronize_rcu() below */
855 rcu_assign_pointer(local->p2p_sdata, NULL);
858 cancel_work_sync(&sdata->work);
860 * When we get here, the interface is marked down.
862 * sta_info_flush_cleanup() requires rcu_barrier()
863 * first to wait for the station call_rcu() calls
864 * to complete, and we also need synchronize_rcu()
865 * to wait for the RX path in case it is using the
866 * interface and enqueuing frames at this very time on
871 sta_info_flush_cleanup(sdata);
874 * Free all remaining keys, there shouldn't be any,
875 * except maybe in WDS mode?
877 ieee80211_free_keys(sdata);
880 case NL80211_IFTYPE_AP:
881 skb_queue_purge(&sdata->skb_queue);
886 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
887 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
888 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
889 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
890 if (info->control.vif == &sdata->vif) {
891 __skb_unlink(skb, &local->pending[i]);
892 ieee80211_free_txskb(&local->hw, skb);
896 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
898 if (local->open_count == 0)
899 ieee80211_clear_tx_pending(local);
902 * If the interface goes down while suspended, presumably because
903 * the device was unplugged and that happens before our resume,
904 * then the driver is already unconfigured and the remainder of
905 * this function isn't needed.
906 * XXX: what about WoWLAN? If the device has software state, e.g.
907 * memory allocated, it might expect teardown commands from
910 if (local->suspended) {
911 WARN_ON(local->wowlan);
912 WARN_ON(rtnl_dereference(local->monitor_sdata));
916 switch (sdata->vif.type) {
917 case NL80211_IFTYPE_AP_VLAN:
919 case NL80211_IFTYPE_MONITOR:
920 if (local->monitors == 0)
921 ieee80211_del_virtual_monitor(local);
923 mutex_lock(&local->mtx);
924 ieee80211_recalc_idle(local);
925 mutex_unlock(&local->mtx);
929 drv_remove_interface(local, sdata);
932 ieee80211_recalc_ps(local, -1);
934 if (local->open_count == 0) {
935 ieee80211_stop_device(local);
937 /* no reconfiguring after stop! */
941 /* do after stop to avoid reconfiguring when we stop anyway */
942 ieee80211_configure_filter(local);
943 ieee80211_hw_config(local, hw_reconf_flags);
945 if (local->monitors == local->open_count)
946 ieee80211_add_virtual_monitor(local);
949 static int ieee80211_stop(struct net_device *dev)
951 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
953 ieee80211_do_stop(sdata, true);
958 static void ieee80211_set_multicast_list(struct net_device *dev)
960 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
961 struct ieee80211_local *local = sdata->local;
962 int allmulti, promisc, sdata_allmulti, sdata_promisc;
964 allmulti = !!(dev->flags & IFF_ALLMULTI);
965 promisc = !!(dev->flags & IFF_PROMISC);
966 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
967 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
969 if (allmulti != sdata_allmulti) {
970 if (dev->flags & IFF_ALLMULTI)
971 atomic_inc(&local->iff_allmultis);
973 atomic_dec(&local->iff_allmultis);
974 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
977 if (promisc != sdata_promisc) {
978 if (dev->flags & IFF_PROMISC)
979 atomic_inc(&local->iff_promiscs);
981 atomic_dec(&local->iff_promiscs);
982 sdata->flags ^= IEEE80211_SDATA_PROMISC;
986 * TODO: If somebody needs this on AP interfaces,
987 * it can be enabled easily but multicast
988 * addresses from VLANs need to be synced.
990 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
991 sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
992 sdata->vif.type != NL80211_IFTYPE_AP)
993 drv_set_multicast_list(local, sdata, &dev->mc);
995 spin_lock_bh(&local->filter_lock);
996 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
997 spin_unlock_bh(&local->filter_lock);
998 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
1002 * Called when the netdev is removed or, by the code below, before
1003 * the interface type changes.
1005 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1010 /* free extra data */
1011 ieee80211_free_keys(sdata);
1013 ieee80211_debugfs_remove_netdev(sdata);
1015 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1016 __skb_queue_purge(&sdata->fragments[i].skb_list);
1017 sdata->fragment_next = 0;
1019 if (ieee80211_vif_is_mesh(&sdata->vif))
1020 mesh_rmc_free(sdata);
1022 flushed = sta_info_flush(sdata);
1026 static void ieee80211_uninit(struct net_device *dev)
1028 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1031 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
1032 struct sk_buff *skb)
1034 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1037 static const struct net_device_ops ieee80211_dataif_ops = {
1038 .ndo_open = ieee80211_open,
1039 .ndo_stop = ieee80211_stop,
1040 .ndo_uninit = ieee80211_uninit,
1041 .ndo_start_xmit = ieee80211_subif_start_xmit,
1042 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1043 .ndo_change_mtu = ieee80211_change_mtu,
1044 .ndo_set_mac_address = ieee80211_change_mac,
1045 .ndo_select_queue = ieee80211_netdev_select_queue,
1048 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
1049 struct sk_buff *skb)
1051 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1052 struct ieee80211_local *local = sdata->local;
1053 struct ieee80211_hdr *hdr;
1054 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1056 if (local->hw.queues < IEEE80211_NUM_ACS)
1060 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
1061 return 0; /* doesn't matter, frame will be dropped */
1063 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
1065 return ieee80211_select_queue_80211(sdata, skb, hdr);
1068 static const struct net_device_ops ieee80211_monitorif_ops = {
1069 .ndo_open = ieee80211_open,
1070 .ndo_stop = ieee80211_stop,
1071 .ndo_uninit = ieee80211_uninit,
1072 .ndo_start_xmit = ieee80211_monitor_start_xmit,
1073 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1074 .ndo_change_mtu = ieee80211_change_mtu,
1075 .ndo_set_mac_address = eth_mac_addr,
1076 .ndo_select_queue = ieee80211_monitor_select_queue,
1079 static void ieee80211_if_setup(struct net_device *dev)
1082 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1083 dev->netdev_ops = &ieee80211_dataif_ops;
1084 dev->destructor = free_netdev;
1087 static void ieee80211_iface_work(struct work_struct *work)
1089 struct ieee80211_sub_if_data *sdata =
1090 container_of(work, struct ieee80211_sub_if_data, work);
1091 struct ieee80211_local *local = sdata->local;
1092 struct sk_buff *skb;
1093 struct sta_info *sta;
1094 struct ieee80211_ra_tid *ra_tid;
1096 if (!ieee80211_sdata_running(sdata))
1099 if (local->scanning)
1103 * ieee80211_queue_work() should have picked up most cases,
1104 * here we'll pick the rest.
1106 if (WARN(local->suspended,
1107 "interface work scheduled while going to suspend\n"))
1110 /* first process frames */
1111 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1112 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1114 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1115 ra_tid = (void *)&skb->cb;
1116 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1118 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1119 ra_tid = (void *)&skb->cb;
1120 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1122 } else if (ieee80211_is_action(mgmt->frame_control) &&
1123 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1126 mutex_lock(&local->sta_mtx);
1127 sta = sta_info_get_bss(sdata, mgmt->sa);
1129 switch (mgmt->u.action.u.addba_req.action_code) {
1130 case WLAN_ACTION_ADDBA_REQ:
1131 ieee80211_process_addba_request(
1132 local, sta, mgmt, len);
1134 case WLAN_ACTION_ADDBA_RESP:
1135 ieee80211_process_addba_resp(local, sta,
1138 case WLAN_ACTION_DELBA:
1139 ieee80211_process_delba(sdata, sta,
1147 mutex_unlock(&local->sta_mtx);
1148 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1149 struct ieee80211_hdr *hdr = (void *)mgmt;
1151 * So the frame isn't mgmt, but frame_control
1152 * is at the right place anyway, of course, so
1153 * the if statement is correct.
1155 * Warn if we have other data frame types here,
1156 * they must not get here.
1158 WARN_ON(hdr->frame_control &
1159 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1160 WARN_ON(!(hdr->seq_ctrl &
1161 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1163 * This was a fragment of a frame, received while
1164 * a block-ack session was active. That cannot be
1165 * right, so terminate the session.
1167 mutex_lock(&local->sta_mtx);
1168 sta = sta_info_get_bss(sdata, mgmt->sa);
1170 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1171 IEEE80211_QOS_CTL_TID_MASK;
1173 __ieee80211_stop_rx_ba_session(
1174 sta, tid, WLAN_BACK_RECIPIENT,
1175 WLAN_REASON_QSTA_REQUIRE_SETUP,
1178 mutex_unlock(&local->sta_mtx);
1179 } else switch (sdata->vif.type) {
1180 case NL80211_IFTYPE_STATION:
1181 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1183 case NL80211_IFTYPE_ADHOC:
1184 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1186 case NL80211_IFTYPE_MESH_POINT:
1187 if (!ieee80211_vif_is_mesh(&sdata->vif))
1189 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1192 WARN(1, "frame for unexpected interface type");
1199 /* then other type-dependent work */
1200 switch (sdata->vif.type) {
1201 case NL80211_IFTYPE_STATION:
1202 ieee80211_sta_work(sdata);
1204 case NL80211_IFTYPE_ADHOC:
1205 ieee80211_ibss_work(sdata);
1207 case NL80211_IFTYPE_MESH_POINT:
1208 if (!ieee80211_vif_is_mesh(&sdata->vif))
1210 ieee80211_mesh_work(sdata);
1217 static void ieee80211_recalc_smps_work(struct work_struct *work)
1219 struct ieee80211_sub_if_data *sdata =
1220 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1222 ieee80211_recalc_smps(sdata);
1226 * Helper function to initialise an interface to a specific type.
1228 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1229 enum nl80211_iftype type)
1231 /* clear type-dependent union */
1232 memset(&sdata->u, 0, sizeof(sdata->u));
1234 /* and set some type-dependent values */
1235 sdata->vif.type = type;
1236 sdata->vif.p2p = false;
1237 sdata->wdev.iftype = type;
1239 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1240 sdata->control_port_no_encrypt = false;
1242 sdata->noack_map = 0;
1244 /* only monitor/p2p-device differ */
1246 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1247 sdata->dev->type = ARPHRD_ETHER;
1250 skb_queue_head_init(&sdata->skb_queue);
1251 INIT_WORK(&sdata->work, ieee80211_iface_work);
1252 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1255 case NL80211_IFTYPE_P2P_GO:
1256 type = NL80211_IFTYPE_AP;
1257 sdata->vif.type = type;
1258 sdata->vif.p2p = true;
1260 case NL80211_IFTYPE_AP:
1261 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1262 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1263 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1265 case NL80211_IFTYPE_P2P_CLIENT:
1266 type = NL80211_IFTYPE_STATION;
1267 sdata->vif.type = type;
1268 sdata->vif.p2p = true;
1270 case NL80211_IFTYPE_STATION:
1271 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1272 ieee80211_sta_setup_sdata(sdata);
1274 case NL80211_IFTYPE_ADHOC:
1275 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1276 ieee80211_ibss_setup_sdata(sdata);
1278 case NL80211_IFTYPE_MESH_POINT:
1279 if (ieee80211_vif_is_mesh(&sdata->vif))
1280 ieee80211_mesh_init_sdata(sdata);
1282 case NL80211_IFTYPE_MONITOR:
1283 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1284 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1285 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1286 MONITOR_FLAG_OTHER_BSS;
1288 case NL80211_IFTYPE_WDS:
1289 sdata->vif.bss_conf.bssid = NULL;
1291 case NL80211_IFTYPE_AP_VLAN:
1293 case NL80211_IFTYPE_P2P_DEVICE:
1294 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1296 case NL80211_IFTYPE_UNSPECIFIED:
1297 case NUM_NL80211_IFTYPES:
1302 ieee80211_debugfs_add_netdev(sdata);
1305 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1306 enum nl80211_iftype type)
1308 struct ieee80211_local *local = sdata->local;
1310 enum nl80211_iftype internal_type = type;
1315 if (!local->ops->change_interface)
1318 switch (sdata->vif.type) {
1319 case NL80211_IFTYPE_AP:
1320 case NL80211_IFTYPE_STATION:
1321 case NL80211_IFTYPE_ADHOC:
1323 * Could maybe also all others here?
1324 * Just not sure how that interacts
1325 * with the RX/config path e.g. for
1334 case NL80211_IFTYPE_AP:
1335 case NL80211_IFTYPE_STATION:
1336 case NL80211_IFTYPE_ADHOC:
1338 * Could probably support everything
1339 * but WDS here (WDS do_open can fail
1340 * under memory pressure, which this
1341 * code isn't prepared to handle).
1344 case NL80211_IFTYPE_P2P_CLIENT:
1346 internal_type = NL80211_IFTYPE_STATION;
1348 case NL80211_IFTYPE_P2P_GO:
1350 internal_type = NL80211_IFTYPE_AP;
1356 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1360 ieee80211_do_stop(sdata, false);
1362 ieee80211_teardown_sdata(sdata);
1364 ret = drv_change_interface(local, sdata, internal_type, p2p);
1366 type = sdata->vif.type;
1369 * Ignore return value here, there's not much we can do since
1370 * the driver changed the interface type internally already.
1371 * The warnings will hopefully make driver authors fix it :-)
1373 ieee80211_check_queues(sdata);
1375 ieee80211_setup_sdata(sdata, type);
1377 err = ieee80211_do_open(&sdata->wdev, false);
1378 WARN(err, "type change: do_open returned %d", err);
1383 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1384 enum nl80211_iftype type)
1390 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1393 if (ieee80211_sdata_running(sdata)) {
1394 ret = ieee80211_runtime_change_iftype(sdata, type);
1398 /* Purge and reset type-dependent state. */
1399 ieee80211_teardown_sdata(sdata);
1400 ieee80211_setup_sdata(sdata, type);
1403 /* reset some values that shouldn't be kept across type changes */
1404 sdata->drop_unencrypted = 0;
1405 if (type == NL80211_IFTYPE_STATION)
1406 sdata->u.mgd.use_4addr = false;
1411 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1412 u8 *perm_addr, enum nl80211_iftype type)
1414 struct ieee80211_sub_if_data *sdata;
1415 u64 mask, start, addr, val, inc;
1417 u8 tmp_addr[ETH_ALEN];
1420 /* default ... something at least */
1421 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1423 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1424 local->hw.wiphy->n_addresses <= 1)
1427 mutex_lock(&local->iflist_mtx);
1430 case NL80211_IFTYPE_MONITOR:
1431 /* doesn't matter */
1433 case NL80211_IFTYPE_WDS:
1434 case NL80211_IFTYPE_AP_VLAN:
1435 /* match up with an AP interface */
1436 list_for_each_entry(sdata, &local->interfaces, list) {
1437 if (sdata->vif.type != NL80211_IFTYPE_AP)
1439 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1442 /* keep default if no AP interface present */
1444 case NL80211_IFTYPE_P2P_CLIENT:
1445 case NL80211_IFTYPE_P2P_GO:
1446 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1447 list_for_each_entry(sdata, &local->interfaces, list) {
1448 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1450 if (!ieee80211_sdata_running(sdata))
1452 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1456 /* otherwise fall through */
1458 /* assign a new address if possible -- try n_addresses first */
1459 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1462 list_for_each_entry(sdata, &local->interfaces, list) {
1463 if (memcmp(local->hw.wiphy->addresses[i].addr,
1464 sdata->vif.addr, ETH_ALEN) == 0) {
1472 local->hw.wiphy->addresses[i].addr,
1478 /* try mask if available */
1479 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1482 m = local->hw.wiphy->addr_mask;
1483 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1484 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1485 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1487 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1488 /* not a contiguous mask ... not handled now! */
1489 pr_info("not contiguous\n");
1494 * Pick address of existing interface in case user changed
1495 * MAC address manually, default to perm_addr.
1497 m = local->hw.wiphy->perm_addr;
1498 list_for_each_entry(sdata, &local->interfaces, list) {
1499 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1501 m = sdata->vif.addr;
1504 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1505 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1506 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1508 inc = 1ULL<<__ffs64(mask);
1509 val = (start & mask);
1510 addr = (start & ~mask) | (val & mask);
1514 tmp_addr[5] = addr >> 0*8;
1515 tmp_addr[4] = addr >> 1*8;
1516 tmp_addr[3] = addr >> 2*8;
1517 tmp_addr[2] = addr >> 3*8;
1518 tmp_addr[1] = addr >> 4*8;
1519 tmp_addr[0] = addr >> 5*8;
1523 list_for_each_entry(sdata, &local->interfaces, list) {
1524 if (memcmp(tmp_addr, sdata->vif.addr,
1532 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1535 addr = (start & ~mask) | (val & mask);
1536 } while (addr != start);
1542 mutex_unlock(&local->iflist_mtx);
1545 static void ieee80211_cleanup_sdata_stas_wk(struct work_struct *wk)
1547 struct ieee80211_sub_if_data *sdata;
1549 sdata = container_of(wk, struct ieee80211_sub_if_data, cleanup_stations_wk);
1551 ieee80211_cleanup_sdata_stas(sdata);
1554 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1555 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1556 struct vif_params *params)
1558 struct net_device *ndev = NULL;
1559 struct ieee80211_sub_if_data *sdata = NULL;
1565 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1566 struct wireless_dev *wdev;
1568 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1572 wdev = &sdata->wdev;
1575 strlcpy(sdata->name, name, IFNAMSIZ);
1576 ieee80211_assign_perm_addr(local, wdev->address, type);
1577 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1579 if (local->hw.queues >= IEEE80211_NUM_ACS)
1580 txqs = IEEE80211_NUM_ACS;
1582 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1583 local->hw.vif_data_size,
1584 name, ieee80211_if_setup, txqs, 1);
1587 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1589 ndev->needed_headroom = local->tx_headroom +
1590 4*6 /* four MAC addresses */
1591 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1593 + 8 /* rfc1042/bridge tunnel */
1594 - ETH_HLEN /* ethernet hard_header_len */
1595 + IEEE80211_ENCRYPT_HEADROOM;
1596 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1598 ret = dev_alloc_name(ndev, ndev->name);
1604 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1605 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1606 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1608 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1609 sdata = netdev_priv(ndev);
1610 ndev->ieee80211_ptr = &sdata->wdev;
1611 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1612 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1617 /* initialise type-independent data */
1618 sdata->wdev.wiphy = local->hw.wiphy;
1619 sdata->local = local;
1621 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1622 skb_queue_head_init(&sdata->fragments[i].skb_list);
1624 INIT_LIST_HEAD(&sdata->key_list);
1626 spin_lock_init(&sdata->cleanup_stations_lock);
1627 INIT_LIST_HEAD(&sdata->cleanup_stations);
1628 INIT_WORK(&sdata->cleanup_stations_wk, ieee80211_cleanup_sdata_stas_wk);
1629 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1630 ieee80211_dfs_cac_timer_work);
1631 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1632 ieee80211_delayed_tailroom_dec);
1634 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1635 struct ieee80211_supported_band *sband;
1636 sband = local->hw.wiphy->bands[i];
1637 sdata->rc_rateidx_mask[i] =
1638 sband ? (1 << sband->n_bitrates) - 1 : 0;
1640 memcpy(sdata->rc_rateidx_mcs_mask[i],
1641 sband->ht_cap.mcs.rx_mask,
1642 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1644 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1645 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1648 ieee80211_set_default_queues(sdata);
1650 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1651 sdata->user_power_level = local->user_power_level;
1653 /* setup type-dependent data */
1654 ieee80211_setup_sdata(sdata, type);
1658 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1659 if (type == NL80211_IFTYPE_STATION)
1660 sdata->u.mgd.use_4addr = params->use_4addr;
1663 ndev->features |= local->hw.netdev_features;
1665 ret = register_netdevice(ndev);
1672 mutex_lock(&local->iflist_mtx);
1673 list_add_tail_rcu(&sdata->list, &local->interfaces);
1674 mutex_unlock(&local->iflist_mtx);
1677 *new_wdev = &sdata->wdev;
1682 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1686 mutex_lock(&sdata->local->iflist_mtx);
1687 list_del_rcu(&sdata->list);
1688 mutex_unlock(&sdata->local->iflist_mtx);
1693 unregister_netdevice(sdata->dev);
1695 cfg80211_unregister_wdev(&sdata->wdev);
1700 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1702 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1704 ieee80211_do_stop(sdata, true);
1705 ieee80211_teardown_sdata(sdata);
1709 * Remove all interfaces, may only be called at hardware unregistration
1710 * time because it doesn't do RCU-safe list removals.
1712 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1714 struct ieee80211_sub_if_data *sdata, *tmp;
1715 LIST_HEAD(unreg_list);
1716 LIST_HEAD(wdev_list);
1721 * Close all AP_VLAN interfaces first, as otherwise they
1722 * might be closed while the AP interface they belong to
1723 * is closed, causing unregister_netdevice_many() to crash.
1725 list_for_each_entry(sdata, &local->interfaces, list)
1726 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1727 dev_close(sdata->dev);
1729 mutex_lock(&local->iflist_mtx);
1730 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1731 list_del(&sdata->list);
1734 unregister_netdevice_queue(sdata->dev, &unreg_list);
1736 list_add(&sdata->list, &wdev_list);
1738 mutex_unlock(&local->iflist_mtx);
1739 unregister_netdevice_many(&unreg_list);
1740 list_del(&unreg_list);
1742 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1743 list_del(&sdata->list);
1744 cfg80211_unregister_wdev(&sdata->wdev);
1749 static int netdev_notify(struct notifier_block *nb,
1750 unsigned long state,
1753 struct net_device *dev = ndev;
1754 struct ieee80211_sub_if_data *sdata;
1756 if (state != NETDEV_CHANGENAME)
1759 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1762 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1765 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1767 memcpy(sdata->name, dev->name, IFNAMSIZ);
1769 ieee80211_debugfs_rename_netdev(sdata);
1773 static struct notifier_block mac80211_netdev_notifier = {
1774 .notifier_call = netdev_notify,
1777 int ieee80211_iface_init(void)
1779 return register_netdevice_notifier(&mac80211_netdev_notifier);
1782 void ieee80211_iface_exit(void)
1784 unregister_netdevice_notifier(&mac80211_netdev_notifier);