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 = ieee80211_chandef_max_power(&chanctx_conf->def);
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,
165 struct ieee80211_local *local = sdata->local;
166 struct ieee80211_sub_if_data *iter;
171 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
175 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
176 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
177 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
179 m = local->hw.wiphy->addr_mask;
180 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
181 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
182 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
187 mutex_lock(&local->iflist_mtx);
188 list_for_each_entry(iter, &local->interfaces, list) {
192 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
193 !(iter->u.mntr_flags & MONITOR_FLAG_ACTIVE))
197 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
198 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
199 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
201 if ((new & ~mask) != (tmp & ~mask)) {
206 mutex_unlock(&local->iflist_mtx);
211 static int ieee80211_change_mac(struct net_device *dev, void *addr)
213 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
214 struct sockaddr *sa = addr;
215 bool check_dup = true;
218 if (ieee80211_sdata_running(sdata))
221 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
222 !(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
225 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
229 ret = eth_mac_addr(dev, sa);
232 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
237 static inline int identical_mac_addr_allowed(int type1, int type2)
239 return type1 == NL80211_IFTYPE_MONITOR ||
240 type2 == NL80211_IFTYPE_MONITOR ||
241 type1 == NL80211_IFTYPE_P2P_DEVICE ||
242 type2 == NL80211_IFTYPE_P2P_DEVICE ||
243 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
244 (type1 == NL80211_IFTYPE_WDS &&
245 (type2 == NL80211_IFTYPE_WDS ||
246 type2 == NL80211_IFTYPE_AP)) ||
247 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
248 (type1 == NL80211_IFTYPE_AP_VLAN &&
249 (type2 == NL80211_IFTYPE_AP ||
250 type2 == NL80211_IFTYPE_AP_VLAN));
253 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
254 enum nl80211_iftype iftype)
256 struct ieee80211_local *local = sdata->local;
257 struct ieee80211_sub_if_data *nsdata;
261 /* we hold the RTNL here so can safely walk the list */
262 list_for_each_entry(nsdata, &local->interfaces, list) {
263 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
265 * Allow only a single IBSS interface to be up at any
266 * time. This is restricted because beacon distribution
267 * cannot work properly if both are in the same IBSS.
269 * To remove this restriction we'd have to disallow them
270 * from setting the same SSID on different IBSS interfaces
271 * belonging to the same hardware. Then, however, we're
272 * faced with having to adopt two different TSF timers...
274 if (iftype == NL80211_IFTYPE_ADHOC &&
275 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
278 * will not add another interface while any channel
281 if (nsdata->vif.csa_active)
285 * The remaining checks are only performed for interfaces
286 * with the same MAC address.
288 if (!ether_addr_equal(sdata->vif.addr,
293 * check whether it may have the same address
295 if (!identical_mac_addr_allowed(iftype,
300 * can only add VLANs to enabled APs
302 if (iftype == NL80211_IFTYPE_AP_VLAN &&
303 nsdata->vif.type == NL80211_IFTYPE_AP)
304 sdata->bss = &nsdata->u.ap;
311 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata)
313 int n_queues = sdata->local->hw.queues;
316 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
317 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
318 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
319 IEEE80211_INVAL_HW_QUEUE))
321 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
327 if ((sdata->vif.type != NL80211_IFTYPE_AP &&
328 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) ||
329 !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
330 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
334 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
337 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
343 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
346 struct ieee80211_local *local = sdata->local;
347 u32 flags = sdata->u.mntr_flags;
349 #define ADJUST(_f, _s) do { \
350 if (flags & MONITOR_FLAG_##_f) \
351 local->fif_##_s += offset; \
354 ADJUST(FCSFAIL, fcsfail);
355 ADJUST(PLCPFAIL, plcpfail);
356 ADJUST(CONTROL, control);
357 ADJUST(CONTROL, pspoll);
358 ADJUST(OTHER_BSS, other_bss);
363 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
365 struct ieee80211_local *local = sdata->local;
368 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
369 if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
370 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
371 else if (local->hw.queues >= IEEE80211_NUM_ACS)
372 sdata->vif.hw_queue[i] = i;
374 sdata->vif.hw_queue[i] = 0;
376 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
379 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
381 struct ieee80211_sub_if_data *sdata;
384 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
389 if (local->monitor_sdata)
392 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
397 sdata->local = local;
398 sdata->vif.type = NL80211_IFTYPE_MONITOR;
399 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
400 wiphy_name(local->hw.wiphy));
402 ieee80211_set_default_queues(sdata);
404 ret = drv_add_interface(local, sdata);
406 /* ok .. stupid driver, it asked for this! */
411 ret = ieee80211_check_queues(sdata);
417 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
418 IEEE80211_CHANCTX_EXCLUSIVE);
420 drv_remove_interface(local, sdata);
425 mutex_lock(&local->iflist_mtx);
426 rcu_assign_pointer(local->monitor_sdata, sdata);
427 mutex_unlock(&local->iflist_mtx);
432 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
434 struct ieee80211_sub_if_data *sdata;
436 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
441 mutex_lock(&local->iflist_mtx);
443 sdata = rcu_dereference_protected(local->monitor_sdata,
444 lockdep_is_held(&local->iflist_mtx));
446 mutex_unlock(&local->iflist_mtx);
450 rcu_assign_pointer(local->monitor_sdata, NULL);
451 mutex_unlock(&local->iflist_mtx);
455 ieee80211_vif_release_channel(sdata);
457 drv_remove_interface(local, sdata);
463 * NOTE: Be very careful when changing this function, it must NOT return
464 * an error on interface type changes that have been pre-checked, so most
465 * checks should be in ieee80211_check_concurrent_iface.
467 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
469 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
470 struct net_device *dev = wdev->netdev;
471 struct ieee80211_local *local = sdata->local;
472 struct sta_info *sta;
475 u32 hw_reconf_flags = 0;
477 switch (sdata->vif.type) {
478 case NL80211_IFTYPE_WDS:
479 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
482 case NL80211_IFTYPE_AP_VLAN: {
483 struct ieee80211_sub_if_data *master;
488 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
490 master = container_of(sdata->bss,
491 struct ieee80211_sub_if_data, u.ap);
492 sdata->control_port_protocol =
493 master->control_port_protocol;
494 sdata->control_port_no_encrypt =
495 master->control_port_no_encrypt;
496 sdata->vif.cab_queue = master->vif.cab_queue;
497 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
498 sizeof(sdata->vif.hw_queue));
501 case NL80211_IFTYPE_AP:
502 sdata->bss = &sdata->u.ap;
504 case NL80211_IFTYPE_MESH_POINT:
505 case NL80211_IFTYPE_STATION:
506 case NL80211_IFTYPE_MONITOR:
507 case NL80211_IFTYPE_ADHOC:
508 case NL80211_IFTYPE_P2P_DEVICE:
509 /* no special treatment */
511 case NL80211_IFTYPE_UNSPECIFIED:
512 case NUM_NL80211_IFTYPES:
513 case NL80211_IFTYPE_P2P_CLIENT:
514 case NL80211_IFTYPE_P2P_GO:
520 if (local->open_count == 0) {
521 res = drv_start(local);
524 /* we're brought up, everything changes */
525 hw_reconf_flags = ~0;
526 ieee80211_led_radio(local, true);
527 ieee80211_mod_tpt_led_trig(local,
528 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
532 * Copy the hopefully now-present MAC address to
533 * this interface, if it has the special null one.
535 if (dev && is_zero_ether_addr(dev->dev_addr)) {
536 memcpy(dev->dev_addr,
537 local->hw.wiphy->perm_addr,
539 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
541 if (!is_valid_ether_addr(dev->dev_addr)) {
542 res = -EADDRNOTAVAIL;
547 switch (sdata->vif.type) {
548 case NL80211_IFTYPE_AP_VLAN:
549 /* no need to tell driver, but set carrier and chanctx */
550 if (rtnl_dereference(sdata->bss->beacon)) {
551 ieee80211_vif_vlan_copy_chanctx(sdata);
552 netif_carrier_on(dev);
554 netif_carrier_off(dev);
557 case NL80211_IFTYPE_MONITOR:
558 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
559 local->cooked_mntrs++;
563 if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) {
564 res = drv_add_interface(local, sdata);
567 } else if (local->monitors == 0 && local->open_count == 0) {
568 res = ieee80211_add_virtual_monitor(local);
573 /* must be before the call to ieee80211_configure_filter */
575 if (local->monitors == 1) {
576 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
577 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
580 ieee80211_adjust_monitor_flags(sdata, 1);
581 ieee80211_configure_filter(local);
582 mutex_lock(&local->mtx);
583 ieee80211_recalc_idle(local);
584 mutex_unlock(&local->mtx);
586 netif_carrier_on(dev);
590 ieee80211_del_virtual_monitor(local);
592 res = drv_add_interface(local, sdata);
595 res = ieee80211_check_queues(sdata);
597 goto err_del_interface;
600 if (sdata->vif.type == NL80211_IFTYPE_AP) {
602 local->fif_probe_req++;
604 ieee80211_configure_filter(local);
605 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
606 local->fif_probe_req++;
609 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
610 changed |= ieee80211_reset_erp_info(sdata);
611 ieee80211_bss_info_change_notify(sdata, changed);
613 switch (sdata->vif.type) {
614 case NL80211_IFTYPE_STATION:
615 case NL80211_IFTYPE_ADHOC:
616 case NL80211_IFTYPE_AP:
617 case NL80211_IFTYPE_MESH_POINT:
618 netif_carrier_off(dev);
620 case NL80211_IFTYPE_WDS:
621 case NL80211_IFTYPE_P2P_DEVICE:
629 * set default queue parameters so drivers don't
630 * need to initialise the hardware if the hardware
631 * doesn't start up with sane defaults
633 ieee80211_set_wmm_default(sdata, true);
636 set_bit(SDATA_STATE_RUNNING, &sdata->state);
638 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
639 /* Create STA entry for the WDS peer */
640 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
644 goto err_del_interface;
647 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
648 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
649 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
651 res = sta_info_insert(sta);
653 /* STA has been freed */
654 goto err_del_interface;
657 rate_control_rate_init(sta);
658 netif_carrier_on(dev);
659 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
660 rcu_assign_pointer(local->p2p_sdata, sdata);
664 * set_multicast_list will be invoked by the networking core
665 * which will check whether any increments here were done in
666 * error and sync them down to the hardware as filter flags.
668 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
669 atomic_inc(&local->iff_allmultis);
671 if (sdata->flags & IEEE80211_SDATA_PROMISC)
672 atomic_inc(&local->iff_promiscs);
678 ieee80211_hw_config(local, hw_reconf_flags);
680 ieee80211_recalc_ps(local, -1);
682 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
683 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
684 /* XXX: for AP_VLAN, actually track AP queues */
685 netif_tx_start_all_queues(dev);
688 int n_acs = IEEE80211_NUM_ACS;
691 if (local->hw.queues < IEEE80211_NUM_ACS)
694 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
695 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
696 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
697 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
698 for (ac = 0; ac < n_acs; ac++) {
699 int ac_queue = sdata->vif.hw_queue[ac];
701 if (local->queue_stop_reasons[ac_queue] == 0 &&
702 skb_queue_empty(&local->pending[ac_queue]))
703 netif_start_subqueue(dev, ac);
706 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
711 drv_remove_interface(local, sdata);
713 if (!local->open_count)
717 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
718 list_del(&sdata->u.vlan.list);
719 /* might already be clear but that doesn't matter */
720 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
724 static int ieee80211_open(struct net_device *dev)
726 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
729 /* fail early if user set an invalid address */
730 if (!is_valid_ether_addr(dev->dev_addr))
731 return -EADDRNOTAVAIL;
733 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
737 return ieee80211_do_open(&sdata->wdev, true);
740 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
743 struct ieee80211_local *local = sdata->local;
745 struct sk_buff *skb, *tmp;
746 u32 hw_reconf_flags = 0;
750 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
752 if (rcu_access_pointer(local->scan_sdata) == sdata)
753 ieee80211_scan_cancel(local);
756 * Stop TX on this interface first.
759 netif_tx_stop_all_queues(sdata->dev);
761 ieee80211_roc_purge(local, sdata);
763 if (sdata->vif.type == NL80211_IFTYPE_STATION)
764 ieee80211_mgd_stop(sdata);
767 * Remove all stations associated with this interface.
769 * This must be done before calling ops->remove_interface()
770 * because otherwise we can later invoke ops->sta_notify()
771 * whenever the STAs are removed, and that invalidates driver
772 * assumptions about always getting a vif pointer that is valid
773 * (because if we remove a STA after ops->remove_interface()
774 * the driver will have removed the vif info already!)
776 * This is relevant only in WDS mode, in all other modes we've
777 * already removed all stations when disconnecting or similar,
780 * We call sta_info_flush_cleanup() later, to combine RCU waits.
782 flushed = sta_info_flush_defer(sdata);
783 WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
784 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
786 /* don't count this interface for promisc/allmulti while it is down */
787 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
788 atomic_dec(&local->iff_allmultis);
790 if (sdata->flags & IEEE80211_SDATA_PROMISC)
791 atomic_dec(&local->iff_promiscs);
793 if (sdata->vif.type == NL80211_IFTYPE_AP) {
795 local->fif_probe_req--;
796 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
797 local->fif_probe_req--;
801 netif_addr_lock_bh(sdata->dev);
802 spin_lock_bh(&local->filter_lock);
803 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
804 sdata->dev->addr_len);
805 spin_unlock_bh(&local->filter_lock);
806 netif_addr_unlock_bh(sdata->dev);
809 del_timer_sync(&local->dynamic_ps_timer);
810 cancel_work_sync(&local->dynamic_ps_enable_work);
812 cancel_work_sync(&sdata->recalc_smps);
813 sdata->vif.csa_active = false;
814 cancel_work_sync(&sdata->csa_finalize_work);
816 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
818 if (sdata->wdev.cac_started) {
819 WARN_ON(local->suspended);
820 mutex_lock(&local->iflist_mtx);
821 ieee80211_vif_release_channel(sdata);
822 mutex_unlock(&local->iflist_mtx);
823 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_ABORTED,
827 /* APs need special treatment */
828 if (sdata->vif.type == NL80211_IFTYPE_AP) {
829 struct ieee80211_sub_if_data *vlan, *tmpsdata;
831 /* down all dependent devices, that is VLANs */
832 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
834 dev_close(vlan->dev);
835 WARN_ON(!list_empty(&sdata->u.ap.vlans));
836 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
837 /* remove all packets in parent bc_buf pointing to this dev */
838 ps = &sdata->bss->ps;
840 spin_lock_irqsave(&ps->bc_buf.lock, flags);
841 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
842 if (skb->dev == sdata->dev) {
843 __skb_unlink(skb, &ps->bc_buf);
844 local->total_ps_buffered--;
845 ieee80211_free_txskb(&local->hw, skb);
848 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
854 switch (sdata->vif.type) {
855 case NL80211_IFTYPE_AP_VLAN:
856 list_del(&sdata->u.vlan.list);
857 rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
858 /* no need to tell driver */
860 case NL80211_IFTYPE_MONITOR:
861 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
862 local->cooked_mntrs--;
867 if (local->monitors == 0) {
868 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
869 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
872 ieee80211_adjust_monitor_flags(sdata, -1);
874 case NL80211_IFTYPE_P2P_DEVICE:
875 /* relies on synchronize_rcu() below */
876 rcu_assign_pointer(local->p2p_sdata, NULL);
879 cancel_work_sync(&sdata->work);
881 * When we get here, the interface is marked down.
883 * sta_info_flush_cleanup() requires rcu_barrier()
884 * first to wait for the station call_rcu() calls
885 * to complete, and we also need synchronize_rcu()
886 * to wait for the RX path in case it is using the
887 * interface and enqueuing frames at this very time on
892 sta_info_flush_cleanup(sdata);
895 * Free all remaining keys, there shouldn't be any,
896 * except maybe in WDS mode?
898 ieee80211_free_keys(sdata);
901 case NL80211_IFTYPE_AP:
902 skb_queue_purge(&sdata->skb_queue);
907 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
908 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
909 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
910 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
911 if (info->control.vif == &sdata->vif) {
912 __skb_unlink(skb, &local->pending[i]);
913 ieee80211_free_txskb(&local->hw, skb);
917 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
919 if (local->open_count == 0)
920 ieee80211_clear_tx_pending(local);
923 * If the interface goes down while suspended, presumably because
924 * the device was unplugged and that happens before our resume,
925 * then the driver is already unconfigured and the remainder of
926 * this function isn't needed.
927 * XXX: what about WoWLAN? If the device has software state, e.g.
928 * memory allocated, it might expect teardown commands from
931 if (local->suspended) {
932 WARN_ON(local->wowlan);
933 WARN_ON(rtnl_dereference(local->monitor_sdata));
937 switch (sdata->vif.type) {
938 case NL80211_IFTYPE_AP_VLAN:
940 case NL80211_IFTYPE_MONITOR:
941 if (local->monitors == 0)
942 ieee80211_del_virtual_monitor(local);
944 mutex_lock(&local->mtx);
945 ieee80211_recalc_idle(local);
946 mutex_unlock(&local->mtx);
948 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
954 drv_remove_interface(local, sdata);
957 ieee80211_recalc_ps(local, -1);
959 if (local->open_count == 0) {
960 ieee80211_stop_device(local);
962 /* no reconfiguring after stop! */
966 /* do after stop to avoid reconfiguring when we stop anyway */
967 ieee80211_configure_filter(local);
968 ieee80211_hw_config(local, hw_reconf_flags);
970 if (local->monitors == local->open_count)
971 ieee80211_add_virtual_monitor(local);
974 static int ieee80211_stop(struct net_device *dev)
976 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
978 ieee80211_do_stop(sdata, true);
983 static void ieee80211_set_multicast_list(struct net_device *dev)
985 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
986 struct ieee80211_local *local = sdata->local;
987 int allmulti, promisc, sdata_allmulti, sdata_promisc;
989 allmulti = !!(dev->flags & IFF_ALLMULTI);
990 promisc = !!(dev->flags & IFF_PROMISC);
991 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
992 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
994 if (allmulti != sdata_allmulti) {
995 if (dev->flags & IFF_ALLMULTI)
996 atomic_inc(&local->iff_allmultis);
998 atomic_dec(&local->iff_allmultis);
999 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1002 if (promisc != sdata_promisc) {
1003 if (dev->flags & IFF_PROMISC)
1004 atomic_inc(&local->iff_promiscs);
1006 atomic_dec(&local->iff_promiscs);
1007 sdata->flags ^= IEEE80211_SDATA_PROMISC;
1011 * TODO: If somebody needs this on AP interfaces,
1012 * it can be enabled easily but multicast
1013 * addresses from VLANs need to be synced.
1015 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1016 sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1017 sdata->vif.type != NL80211_IFTYPE_AP)
1018 drv_set_multicast_list(local, sdata, &dev->mc);
1020 spin_lock_bh(&local->filter_lock);
1021 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
1022 spin_unlock_bh(&local->filter_lock);
1023 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
1027 * Called when the netdev is removed or, by the code below, before
1028 * the interface type changes.
1030 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1035 /* free extra data */
1036 ieee80211_free_keys(sdata);
1038 ieee80211_debugfs_remove_netdev(sdata);
1040 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1041 __skb_queue_purge(&sdata->fragments[i].skb_list);
1042 sdata->fragment_next = 0;
1044 if (ieee80211_vif_is_mesh(&sdata->vif))
1045 mesh_rmc_free(sdata);
1047 flushed = sta_info_flush(sdata);
1051 static void ieee80211_uninit(struct net_device *dev)
1053 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1056 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
1057 struct sk_buff *skb)
1059 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1062 static const struct net_device_ops ieee80211_dataif_ops = {
1063 .ndo_open = ieee80211_open,
1064 .ndo_stop = ieee80211_stop,
1065 .ndo_uninit = ieee80211_uninit,
1066 .ndo_start_xmit = ieee80211_subif_start_xmit,
1067 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1068 .ndo_change_mtu = ieee80211_change_mtu,
1069 .ndo_set_mac_address = ieee80211_change_mac,
1070 .ndo_select_queue = ieee80211_netdev_select_queue,
1073 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
1074 struct sk_buff *skb)
1076 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1077 struct ieee80211_local *local = sdata->local;
1078 struct ieee80211_hdr *hdr;
1079 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1081 if (local->hw.queues < IEEE80211_NUM_ACS)
1085 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
1086 return 0; /* doesn't matter, frame will be dropped */
1088 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
1090 return ieee80211_select_queue_80211(sdata, skb, hdr);
1093 static const struct net_device_ops ieee80211_monitorif_ops = {
1094 .ndo_open = ieee80211_open,
1095 .ndo_stop = ieee80211_stop,
1096 .ndo_uninit = ieee80211_uninit,
1097 .ndo_start_xmit = ieee80211_monitor_start_xmit,
1098 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1099 .ndo_change_mtu = ieee80211_change_mtu,
1100 .ndo_set_mac_address = ieee80211_change_mac,
1101 .ndo_select_queue = ieee80211_monitor_select_queue,
1104 static void ieee80211_if_setup(struct net_device *dev)
1107 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1108 dev->netdev_ops = &ieee80211_dataif_ops;
1109 dev->destructor = free_netdev;
1112 static void ieee80211_iface_work(struct work_struct *work)
1114 struct ieee80211_sub_if_data *sdata =
1115 container_of(work, struct ieee80211_sub_if_data, work);
1116 struct ieee80211_local *local = sdata->local;
1117 struct sk_buff *skb;
1118 struct sta_info *sta;
1119 struct ieee80211_ra_tid *ra_tid;
1121 if (!ieee80211_sdata_running(sdata))
1124 if (local->scanning)
1128 * ieee80211_queue_work() should have picked up most cases,
1129 * here we'll pick the rest.
1131 if (WARN(local->suspended,
1132 "interface work scheduled while going to suspend\n"))
1135 /* first process frames */
1136 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1137 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1139 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1140 ra_tid = (void *)&skb->cb;
1141 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1143 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1144 ra_tid = (void *)&skb->cb;
1145 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1147 } else if (ieee80211_is_action(mgmt->frame_control) &&
1148 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1151 mutex_lock(&local->sta_mtx);
1152 sta = sta_info_get_bss(sdata, mgmt->sa);
1154 switch (mgmt->u.action.u.addba_req.action_code) {
1155 case WLAN_ACTION_ADDBA_REQ:
1156 ieee80211_process_addba_request(
1157 local, sta, mgmt, len);
1159 case WLAN_ACTION_ADDBA_RESP:
1160 ieee80211_process_addba_resp(local, sta,
1163 case WLAN_ACTION_DELBA:
1164 ieee80211_process_delba(sdata, sta,
1172 mutex_unlock(&local->sta_mtx);
1173 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1174 struct ieee80211_hdr *hdr = (void *)mgmt;
1176 * So the frame isn't mgmt, but frame_control
1177 * is at the right place anyway, of course, so
1178 * the if statement is correct.
1180 * Warn if we have other data frame types here,
1181 * they must not get here.
1183 WARN_ON(hdr->frame_control &
1184 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1185 WARN_ON(!(hdr->seq_ctrl &
1186 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1188 * This was a fragment of a frame, received while
1189 * a block-ack session was active. That cannot be
1190 * right, so terminate the session.
1192 mutex_lock(&local->sta_mtx);
1193 sta = sta_info_get_bss(sdata, mgmt->sa);
1195 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1196 IEEE80211_QOS_CTL_TID_MASK;
1198 __ieee80211_stop_rx_ba_session(
1199 sta, tid, WLAN_BACK_RECIPIENT,
1200 WLAN_REASON_QSTA_REQUIRE_SETUP,
1203 mutex_unlock(&local->sta_mtx);
1204 } else switch (sdata->vif.type) {
1205 case NL80211_IFTYPE_STATION:
1206 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1208 case NL80211_IFTYPE_ADHOC:
1209 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1211 case NL80211_IFTYPE_MESH_POINT:
1212 if (!ieee80211_vif_is_mesh(&sdata->vif))
1214 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1217 WARN(1, "frame for unexpected interface type");
1224 /* then other type-dependent work */
1225 switch (sdata->vif.type) {
1226 case NL80211_IFTYPE_STATION:
1227 ieee80211_sta_work(sdata);
1229 case NL80211_IFTYPE_ADHOC:
1230 ieee80211_ibss_work(sdata);
1232 case NL80211_IFTYPE_MESH_POINT:
1233 if (!ieee80211_vif_is_mesh(&sdata->vif))
1235 ieee80211_mesh_work(sdata);
1242 static void ieee80211_recalc_smps_work(struct work_struct *work)
1244 struct ieee80211_sub_if_data *sdata =
1245 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1247 ieee80211_recalc_smps(sdata);
1251 * Helper function to initialise an interface to a specific type.
1253 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1254 enum nl80211_iftype type)
1256 /* clear type-dependent union */
1257 memset(&sdata->u, 0, sizeof(sdata->u));
1259 /* and set some type-dependent values */
1260 sdata->vif.type = type;
1261 sdata->vif.p2p = false;
1262 sdata->wdev.iftype = type;
1264 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1265 sdata->control_port_no_encrypt = false;
1267 sdata->noack_map = 0;
1269 /* only monitor/p2p-device differ */
1271 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1272 sdata->dev->type = ARPHRD_ETHER;
1275 skb_queue_head_init(&sdata->skb_queue);
1276 INIT_WORK(&sdata->work, ieee80211_iface_work);
1277 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1278 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
1281 case NL80211_IFTYPE_P2P_GO:
1282 type = NL80211_IFTYPE_AP;
1283 sdata->vif.type = type;
1284 sdata->vif.p2p = true;
1286 case NL80211_IFTYPE_AP:
1287 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1288 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1289 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1291 case NL80211_IFTYPE_P2P_CLIENT:
1292 type = NL80211_IFTYPE_STATION;
1293 sdata->vif.type = type;
1294 sdata->vif.p2p = true;
1296 case NL80211_IFTYPE_STATION:
1297 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1298 ieee80211_sta_setup_sdata(sdata);
1300 case NL80211_IFTYPE_ADHOC:
1301 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1302 ieee80211_ibss_setup_sdata(sdata);
1304 case NL80211_IFTYPE_MESH_POINT:
1305 if (ieee80211_vif_is_mesh(&sdata->vif))
1306 ieee80211_mesh_init_sdata(sdata);
1308 case NL80211_IFTYPE_MONITOR:
1309 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1310 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1311 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1312 MONITOR_FLAG_OTHER_BSS;
1314 case NL80211_IFTYPE_WDS:
1315 sdata->vif.bss_conf.bssid = NULL;
1317 case NL80211_IFTYPE_AP_VLAN:
1319 case NL80211_IFTYPE_P2P_DEVICE:
1320 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1322 case NL80211_IFTYPE_UNSPECIFIED:
1323 case NUM_NL80211_IFTYPES:
1328 ieee80211_debugfs_add_netdev(sdata);
1331 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1332 enum nl80211_iftype type)
1334 struct ieee80211_local *local = sdata->local;
1336 enum nl80211_iftype internal_type = type;
1341 if (!local->ops->change_interface)
1344 switch (sdata->vif.type) {
1345 case NL80211_IFTYPE_AP:
1346 case NL80211_IFTYPE_STATION:
1347 case NL80211_IFTYPE_ADHOC:
1349 * Could maybe also all others here?
1350 * Just not sure how that interacts
1351 * with the RX/config path e.g. for
1360 case NL80211_IFTYPE_AP:
1361 case NL80211_IFTYPE_STATION:
1362 case NL80211_IFTYPE_ADHOC:
1364 * Could probably support everything
1365 * but WDS here (WDS do_open can fail
1366 * under memory pressure, which this
1367 * code isn't prepared to handle).
1370 case NL80211_IFTYPE_P2P_CLIENT:
1372 internal_type = NL80211_IFTYPE_STATION;
1374 case NL80211_IFTYPE_P2P_GO:
1376 internal_type = NL80211_IFTYPE_AP;
1382 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1386 ieee80211_do_stop(sdata, false);
1388 ieee80211_teardown_sdata(sdata);
1390 ret = drv_change_interface(local, sdata, internal_type, p2p);
1392 type = sdata->vif.type;
1395 * Ignore return value here, there's not much we can do since
1396 * the driver changed the interface type internally already.
1397 * The warnings will hopefully make driver authors fix it :-)
1399 ieee80211_check_queues(sdata);
1401 ieee80211_setup_sdata(sdata, type);
1403 err = ieee80211_do_open(&sdata->wdev, false);
1404 WARN(err, "type change: do_open returned %d", err);
1409 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1410 enum nl80211_iftype type)
1416 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1419 if (ieee80211_sdata_running(sdata)) {
1420 ret = ieee80211_runtime_change_iftype(sdata, type);
1424 /* Purge and reset type-dependent state. */
1425 ieee80211_teardown_sdata(sdata);
1426 ieee80211_setup_sdata(sdata, type);
1429 /* reset some values that shouldn't be kept across type changes */
1430 sdata->drop_unencrypted = 0;
1431 if (type == NL80211_IFTYPE_STATION)
1432 sdata->u.mgd.use_4addr = false;
1437 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1438 u8 *perm_addr, enum nl80211_iftype type)
1440 struct ieee80211_sub_if_data *sdata;
1441 u64 mask, start, addr, val, inc;
1443 u8 tmp_addr[ETH_ALEN];
1446 /* default ... something at least */
1447 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1449 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1450 local->hw.wiphy->n_addresses <= 1)
1453 mutex_lock(&local->iflist_mtx);
1456 case NL80211_IFTYPE_MONITOR:
1457 /* doesn't matter */
1459 case NL80211_IFTYPE_WDS:
1460 case NL80211_IFTYPE_AP_VLAN:
1461 /* match up with an AP interface */
1462 list_for_each_entry(sdata, &local->interfaces, list) {
1463 if (sdata->vif.type != NL80211_IFTYPE_AP)
1465 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1468 /* keep default if no AP interface present */
1470 case NL80211_IFTYPE_P2P_CLIENT:
1471 case NL80211_IFTYPE_P2P_GO:
1472 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1473 list_for_each_entry(sdata, &local->interfaces, list) {
1474 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1476 if (!ieee80211_sdata_running(sdata))
1478 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1482 /* otherwise fall through */
1484 /* assign a new address if possible -- try n_addresses first */
1485 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1488 list_for_each_entry(sdata, &local->interfaces, list) {
1489 if (memcmp(local->hw.wiphy->addresses[i].addr,
1490 sdata->vif.addr, ETH_ALEN) == 0) {
1498 local->hw.wiphy->addresses[i].addr,
1504 /* try mask if available */
1505 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1508 m = local->hw.wiphy->addr_mask;
1509 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1510 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1511 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1513 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1514 /* not a contiguous mask ... not handled now! */
1515 pr_info("not contiguous\n");
1520 * Pick address of existing interface in case user changed
1521 * MAC address manually, default to perm_addr.
1523 m = local->hw.wiphy->perm_addr;
1524 list_for_each_entry(sdata, &local->interfaces, list) {
1525 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1527 m = sdata->vif.addr;
1530 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1531 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1532 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1534 inc = 1ULL<<__ffs64(mask);
1535 val = (start & mask);
1536 addr = (start & ~mask) | (val & mask);
1540 tmp_addr[5] = addr >> 0*8;
1541 tmp_addr[4] = addr >> 1*8;
1542 tmp_addr[3] = addr >> 2*8;
1543 tmp_addr[2] = addr >> 3*8;
1544 tmp_addr[1] = addr >> 4*8;
1545 tmp_addr[0] = addr >> 5*8;
1549 list_for_each_entry(sdata, &local->interfaces, list) {
1550 if (memcmp(tmp_addr, sdata->vif.addr,
1558 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1561 addr = (start & ~mask) | (val & mask);
1562 } while (addr != start);
1568 mutex_unlock(&local->iflist_mtx);
1571 static void ieee80211_cleanup_sdata_stas_wk(struct work_struct *wk)
1573 struct ieee80211_sub_if_data *sdata;
1575 sdata = container_of(wk, struct ieee80211_sub_if_data, cleanup_stations_wk);
1577 ieee80211_cleanup_sdata_stas(sdata);
1580 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1581 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1582 struct vif_params *params)
1584 struct net_device *ndev = NULL;
1585 struct ieee80211_sub_if_data *sdata = NULL;
1591 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1592 struct wireless_dev *wdev;
1594 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1598 wdev = &sdata->wdev;
1601 strlcpy(sdata->name, name, IFNAMSIZ);
1602 ieee80211_assign_perm_addr(local, wdev->address, type);
1603 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1605 if (local->hw.queues >= IEEE80211_NUM_ACS)
1606 txqs = IEEE80211_NUM_ACS;
1608 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1609 local->hw.vif_data_size,
1610 name, ieee80211_if_setup, txqs, 1);
1613 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1615 ndev->needed_headroom = local->tx_headroom +
1616 4*6 /* four MAC addresses */
1617 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1619 + 8 /* rfc1042/bridge tunnel */
1620 - ETH_HLEN /* ethernet hard_header_len */
1621 + IEEE80211_ENCRYPT_HEADROOM;
1622 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1624 ret = dev_alloc_name(ndev, ndev->name);
1630 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1631 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1632 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1634 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1635 sdata = netdev_priv(ndev);
1636 ndev->ieee80211_ptr = &sdata->wdev;
1637 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1638 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1643 /* initialise type-independent data */
1644 sdata->wdev.wiphy = local->hw.wiphy;
1645 sdata->local = local;
1647 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1648 skb_queue_head_init(&sdata->fragments[i].skb_list);
1650 INIT_LIST_HEAD(&sdata->key_list);
1652 spin_lock_init(&sdata->cleanup_stations_lock);
1653 INIT_LIST_HEAD(&sdata->cleanup_stations);
1654 INIT_WORK(&sdata->cleanup_stations_wk, ieee80211_cleanup_sdata_stas_wk);
1655 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1656 ieee80211_dfs_cac_timer_work);
1657 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1658 ieee80211_delayed_tailroom_dec);
1660 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1661 struct ieee80211_supported_band *sband;
1662 sband = local->hw.wiphy->bands[i];
1663 sdata->rc_rateidx_mask[i] =
1664 sband ? (1 << sband->n_bitrates) - 1 : 0;
1666 memcpy(sdata->rc_rateidx_mcs_mask[i],
1667 sband->ht_cap.mcs.rx_mask,
1668 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1670 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1671 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1674 ieee80211_set_default_queues(sdata);
1676 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1677 sdata->user_power_level = local->user_power_level;
1679 /* setup type-dependent data */
1680 ieee80211_setup_sdata(sdata, type);
1684 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1685 if (type == NL80211_IFTYPE_STATION)
1686 sdata->u.mgd.use_4addr = params->use_4addr;
1689 ndev->features |= local->hw.netdev_features;
1691 ret = register_netdevice(ndev);
1698 mutex_lock(&local->iflist_mtx);
1699 list_add_tail_rcu(&sdata->list, &local->interfaces);
1700 mutex_unlock(&local->iflist_mtx);
1703 *new_wdev = &sdata->wdev;
1708 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1712 mutex_lock(&sdata->local->iflist_mtx);
1713 list_del_rcu(&sdata->list);
1714 mutex_unlock(&sdata->local->iflist_mtx);
1719 unregister_netdevice(sdata->dev);
1721 cfg80211_unregister_wdev(&sdata->wdev);
1726 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1728 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1730 ieee80211_do_stop(sdata, true);
1731 ieee80211_teardown_sdata(sdata);
1735 * Remove all interfaces, may only be called at hardware unregistration
1736 * time because it doesn't do RCU-safe list removals.
1738 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1740 struct ieee80211_sub_if_data *sdata, *tmp;
1741 LIST_HEAD(unreg_list);
1742 LIST_HEAD(wdev_list);
1747 * Close all AP_VLAN interfaces first, as otherwise they
1748 * might be closed while the AP interface they belong to
1749 * is closed, causing unregister_netdevice_many() to crash.
1751 list_for_each_entry(sdata, &local->interfaces, list)
1752 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1753 dev_close(sdata->dev);
1755 mutex_lock(&local->iflist_mtx);
1756 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1757 list_del(&sdata->list);
1760 unregister_netdevice_queue(sdata->dev, &unreg_list);
1762 list_add(&sdata->list, &wdev_list);
1764 mutex_unlock(&local->iflist_mtx);
1765 unregister_netdevice_many(&unreg_list);
1766 list_del(&unreg_list);
1768 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1769 list_del(&sdata->list);
1770 cfg80211_unregister_wdev(&sdata->wdev);
1775 static int netdev_notify(struct notifier_block *nb,
1776 unsigned long state, void *ptr)
1778 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1779 struct ieee80211_sub_if_data *sdata;
1781 if (state != NETDEV_CHANGENAME)
1784 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1787 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1790 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1792 memcpy(sdata->name, dev->name, IFNAMSIZ);
1794 ieee80211_debugfs_rename_netdev(sdata);
1798 static struct notifier_block mac80211_netdev_notifier = {
1799 .notifier_call = netdev_notify,
1802 int ieee80211_iface_init(void)
1804 return register_netdevice_notifier(&mac80211_netdev_notifier);
1807 void ieee80211_iface_exit(void)
1809 unregister_netdevice_notifier(&mac80211_netdev_notifier);