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,
312 enum nl80211_iftype iftype)
314 int n_queues = sdata->local->hw.queues;
317 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
318 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
319 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
320 IEEE80211_INVAL_HW_QUEUE))
322 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
328 if ((iftype != NL80211_IFTYPE_AP &&
329 iftype != NL80211_IFTYPE_P2P_GO &&
330 iftype != NL80211_IFTYPE_MESH_POINT) ||
331 !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
332 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
336 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
339 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
345 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
348 struct ieee80211_local *local = sdata->local;
349 u32 flags = sdata->u.mntr_flags;
351 #define ADJUST(_f, _s) do { \
352 if (flags & MONITOR_FLAG_##_f) \
353 local->fif_##_s += offset; \
356 ADJUST(FCSFAIL, fcsfail);
357 ADJUST(PLCPFAIL, plcpfail);
358 ADJUST(CONTROL, control);
359 ADJUST(CONTROL, pspoll);
360 ADJUST(OTHER_BSS, other_bss);
365 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
367 struct ieee80211_local *local = sdata->local;
370 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
371 if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
372 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
373 else if (local->hw.queues >= IEEE80211_NUM_ACS)
374 sdata->vif.hw_queue[i] = i;
376 sdata->vif.hw_queue[i] = 0;
378 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
381 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
383 struct ieee80211_sub_if_data *sdata;
386 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
391 if (local->monitor_sdata)
394 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
399 sdata->local = local;
400 sdata->vif.type = NL80211_IFTYPE_MONITOR;
401 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
402 wiphy_name(local->hw.wiphy));
404 ieee80211_set_default_queues(sdata);
406 ret = drv_add_interface(local, sdata);
408 /* ok .. stupid driver, it asked for this! */
413 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
419 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
420 IEEE80211_CHANCTX_EXCLUSIVE);
422 drv_remove_interface(local, sdata);
427 mutex_lock(&local->iflist_mtx);
428 rcu_assign_pointer(local->monitor_sdata, sdata);
429 mutex_unlock(&local->iflist_mtx);
434 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
436 struct ieee80211_sub_if_data *sdata;
438 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
443 mutex_lock(&local->iflist_mtx);
445 sdata = rcu_dereference_protected(local->monitor_sdata,
446 lockdep_is_held(&local->iflist_mtx));
448 mutex_unlock(&local->iflist_mtx);
452 rcu_assign_pointer(local->monitor_sdata, NULL);
453 mutex_unlock(&local->iflist_mtx);
457 ieee80211_vif_release_channel(sdata);
459 drv_remove_interface(local, sdata);
465 * NOTE: Be very careful when changing this function, it must NOT return
466 * an error on interface type changes that have been pre-checked, so most
467 * checks should be in ieee80211_check_concurrent_iface.
469 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
471 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
472 struct net_device *dev = wdev->netdev;
473 struct ieee80211_local *local = sdata->local;
474 struct sta_info *sta;
477 u32 hw_reconf_flags = 0;
479 switch (sdata->vif.type) {
480 case NL80211_IFTYPE_WDS:
481 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
484 case NL80211_IFTYPE_AP_VLAN: {
485 struct ieee80211_sub_if_data *master;
490 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
492 master = container_of(sdata->bss,
493 struct ieee80211_sub_if_data, u.ap);
494 sdata->control_port_protocol =
495 master->control_port_protocol;
496 sdata->control_port_no_encrypt =
497 master->control_port_no_encrypt;
498 sdata->vif.cab_queue = master->vif.cab_queue;
499 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
500 sizeof(sdata->vif.hw_queue));
503 case NL80211_IFTYPE_AP:
504 sdata->bss = &sdata->u.ap;
506 case NL80211_IFTYPE_MESH_POINT:
507 case NL80211_IFTYPE_STATION:
508 case NL80211_IFTYPE_MONITOR:
509 case NL80211_IFTYPE_ADHOC:
510 case NL80211_IFTYPE_P2P_DEVICE:
511 /* no special treatment */
513 case NL80211_IFTYPE_UNSPECIFIED:
514 case NUM_NL80211_IFTYPES:
515 case NL80211_IFTYPE_P2P_CLIENT:
516 case NL80211_IFTYPE_P2P_GO:
522 if (local->open_count == 0) {
523 res = drv_start(local);
526 /* we're brought up, everything changes */
527 hw_reconf_flags = ~0;
528 ieee80211_led_radio(local, true);
529 ieee80211_mod_tpt_led_trig(local,
530 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
534 * Copy the hopefully now-present MAC address to
535 * this interface, if it has the special null one.
537 if (dev && is_zero_ether_addr(dev->dev_addr)) {
538 memcpy(dev->dev_addr,
539 local->hw.wiphy->perm_addr,
541 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
543 if (!is_valid_ether_addr(dev->dev_addr)) {
544 res = -EADDRNOTAVAIL;
549 switch (sdata->vif.type) {
550 case NL80211_IFTYPE_AP_VLAN:
551 /* no need to tell driver, but set carrier and chanctx */
552 if (rtnl_dereference(sdata->bss->beacon)) {
553 ieee80211_vif_vlan_copy_chanctx(sdata);
554 netif_carrier_on(dev);
556 netif_carrier_off(dev);
559 case NL80211_IFTYPE_MONITOR:
560 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
561 local->cooked_mntrs++;
565 if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) {
566 res = drv_add_interface(local, sdata);
569 } else if (local->monitors == 0 && local->open_count == 0) {
570 res = ieee80211_add_virtual_monitor(local);
575 /* must be before the call to ieee80211_configure_filter */
577 if (local->monitors == 1) {
578 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
579 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
582 ieee80211_adjust_monitor_flags(sdata, 1);
583 ieee80211_configure_filter(local);
584 mutex_lock(&local->mtx);
585 ieee80211_recalc_idle(local);
586 mutex_unlock(&local->mtx);
588 netif_carrier_on(dev);
592 ieee80211_del_virtual_monitor(local);
594 res = drv_add_interface(local, sdata);
597 res = ieee80211_check_queues(sdata,
598 ieee80211_vif_type_p2p(&sdata->vif));
600 goto err_del_interface;
603 if (sdata->vif.type == NL80211_IFTYPE_AP) {
605 local->fif_probe_req++;
607 ieee80211_configure_filter(local);
608 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
609 local->fif_probe_req++;
612 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
613 changed |= ieee80211_reset_erp_info(sdata);
614 ieee80211_bss_info_change_notify(sdata, changed);
616 switch (sdata->vif.type) {
617 case NL80211_IFTYPE_STATION:
618 case NL80211_IFTYPE_ADHOC:
619 case NL80211_IFTYPE_AP:
620 case NL80211_IFTYPE_MESH_POINT:
621 netif_carrier_off(dev);
623 case NL80211_IFTYPE_WDS:
624 case NL80211_IFTYPE_P2P_DEVICE:
632 * set default queue parameters so drivers don't
633 * need to initialise the hardware if the hardware
634 * doesn't start up with sane defaults
636 ieee80211_set_wmm_default(sdata, true);
639 set_bit(SDATA_STATE_RUNNING, &sdata->state);
641 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
642 /* Create STA entry for the WDS peer */
643 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
647 goto err_del_interface;
650 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
651 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
652 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
654 res = sta_info_insert(sta);
656 /* STA has been freed */
657 goto err_del_interface;
660 rate_control_rate_init(sta);
661 netif_carrier_on(dev);
662 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
663 rcu_assign_pointer(local->p2p_sdata, sdata);
667 * set_multicast_list will be invoked by the networking core
668 * which will check whether any increments here were done in
669 * error and sync them down to the hardware as filter flags.
671 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
672 atomic_inc(&local->iff_allmultis);
674 if (sdata->flags & IEEE80211_SDATA_PROMISC)
675 atomic_inc(&local->iff_promiscs);
681 ieee80211_hw_config(local, hw_reconf_flags);
683 ieee80211_recalc_ps(local, -1);
685 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
686 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
687 /* XXX: for AP_VLAN, actually track AP queues */
688 netif_tx_start_all_queues(dev);
691 int n_acs = IEEE80211_NUM_ACS;
694 if (local->hw.queues < IEEE80211_NUM_ACS)
697 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
698 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
699 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
700 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
701 for (ac = 0; ac < n_acs; ac++) {
702 int ac_queue = sdata->vif.hw_queue[ac];
704 if (local->queue_stop_reasons[ac_queue] == 0 &&
705 skb_queue_empty(&local->pending[ac_queue]))
706 netif_start_subqueue(dev, ac);
709 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
714 drv_remove_interface(local, sdata);
716 if (!local->open_count)
720 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
721 list_del(&sdata->u.vlan.list);
722 /* might already be clear but that doesn't matter */
723 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
727 static int ieee80211_open(struct net_device *dev)
729 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
732 /* fail early if user set an invalid address */
733 if (!is_valid_ether_addr(dev->dev_addr))
734 return -EADDRNOTAVAIL;
736 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
740 return ieee80211_do_open(&sdata->wdev, true);
743 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
746 struct ieee80211_local *local = sdata->local;
748 struct sk_buff *skb, *tmp;
749 u32 hw_reconf_flags = 0;
753 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
755 if (rcu_access_pointer(local->scan_sdata) == sdata)
756 ieee80211_scan_cancel(local);
759 * Stop TX on this interface first.
762 netif_tx_stop_all_queues(sdata->dev);
764 ieee80211_roc_purge(local, sdata);
766 if (sdata->vif.type == NL80211_IFTYPE_STATION)
767 ieee80211_mgd_stop(sdata);
769 if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
770 ieee80211_ibss_stop(sdata);
774 * Remove all stations associated with this interface.
776 * This must be done before calling ops->remove_interface()
777 * because otherwise we can later invoke ops->sta_notify()
778 * whenever the STAs are removed, and that invalidates driver
779 * assumptions about always getting a vif pointer that is valid
780 * (because if we remove a STA after ops->remove_interface()
781 * the driver will have removed the vif info already!)
783 * This is relevant only in WDS mode, in all other modes we've
784 * already removed all stations when disconnecting or similar,
787 * We call sta_info_flush_cleanup() later, to combine RCU waits.
789 flushed = sta_info_flush_defer(sdata);
790 WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
791 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
793 /* don't count this interface for promisc/allmulti while it is down */
794 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
795 atomic_dec(&local->iff_allmultis);
797 if (sdata->flags & IEEE80211_SDATA_PROMISC)
798 atomic_dec(&local->iff_promiscs);
800 if (sdata->vif.type == NL80211_IFTYPE_AP) {
802 local->fif_probe_req--;
803 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
804 local->fif_probe_req--;
808 netif_addr_lock_bh(sdata->dev);
809 spin_lock_bh(&local->filter_lock);
810 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
811 sdata->dev->addr_len);
812 spin_unlock_bh(&local->filter_lock);
813 netif_addr_unlock_bh(sdata->dev);
816 del_timer_sync(&local->dynamic_ps_timer);
817 cancel_work_sync(&local->dynamic_ps_enable_work);
819 cancel_work_sync(&sdata->recalc_smps);
820 sdata->vif.csa_active = false;
821 cancel_work_sync(&sdata->csa_finalize_work);
823 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
825 if (sdata->wdev.cac_started) {
826 WARN_ON(local->suspended);
827 mutex_lock(&local->iflist_mtx);
828 ieee80211_vif_release_channel(sdata);
829 mutex_unlock(&local->iflist_mtx);
830 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_ABORTED,
834 /* APs need special treatment */
835 if (sdata->vif.type == NL80211_IFTYPE_AP) {
836 struct ieee80211_sub_if_data *vlan, *tmpsdata;
838 /* down all dependent devices, that is VLANs */
839 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
841 dev_close(vlan->dev);
842 WARN_ON(!list_empty(&sdata->u.ap.vlans));
843 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
844 /* remove all packets in parent bc_buf pointing to this dev */
845 ps = &sdata->bss->ps;
847 spin_lock_irqsave(&ps->bc_buf.lock, flags);
848 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
849 if (skb->dev == sdata->dev) {
850 __skb_unlink(skb, &ps->bc_buf);
851 local->total_ps_buffered--;
852 ieee80211_free_txskb(&local->hw, skb);
855 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
861 switch (sdata->vif.type) {
862 case NL80211_IFTYPE_AP_VLAN:
863 list_del(&sdata->u.vlan.list);
864 rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
865 /* no need to tell driver */
867 case NL80211_IFTYPE_MONITOR:
868 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
869 local->cooked_mntrs--;
874 if (local->monitors == 0) {
875 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
876 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
879 ieee80211_adjust_monitor_flags(sdata, -1);
881 case NL80211_IFTYPE_P2P_DEVICE:
882 /* relies on synchronize_rcu() below */
883 rcu_assign_pointer(local->p2p_sdata, NULL);
886 cancel_work_sync(&sdata->work);
888 * When we get here, the interface is marked down.
890 * sta_info_flush_cleanup() requires rcu_barrier()
891 * first to wait for the station call_rcu() calls
892 * to complete, and we also need synchronize_rcu()
893 * to wait for the RX path in case it is using the
894 * interface and enqueuing frames at this very time on
899 sta_info_flush_cleanup(sdata);
902 * Free all remaining keys, there shouldn't be any,
903 * except maybe in WDS mode?
905 ieee80211_free_keys(sdata);
908 case NL80211_IFTYPE_AP:
909 skb_queue_purge(&sdata->skb_queue);
914 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
915 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
916 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
917 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
918 if (info->control.vif == &sdata->vif) {
919 __skb_unlink(skb, &local->pending[i]);
920 ieee80211_free_txskb(&local->hw, skb);
924 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
926 if (local->open_count == 0)
927 ieee80211_clear_tx_pending(local);
930 * If the interface goes down while suspended, presumably because
931 * the device was unplugged and that happens before our resume,
932 * then the driver is already unconfigured and the remainder of
933 * this function isn't needed.
934 * XXX: what about WoWLAN? If the device has software state, e.g.
935 * memory allocated, it might expect teardown commands from
938 if (local->suspended) {
939 WARN_ON(local->wowlan);
940 WARN_ON(rtnl_dereference(local->monitor_sdata));
944 switch (sdata->vif.type) {
945 case NL80211_IFTYPE_AP_VLAN:
947 case NL80211_IFTYPE_MONITOR:
948 if (local->monitors == 0)
949 ieee80211_del_virtual_monitor(local);
951 mutex_lock(&local->mtx);
952 ieee80211_recalc_idle(local);
953 mutex_unlock(&local->mtx);
955 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
961 drv_remove_interface(local, sdata);
964 ieee80211_recalc_ps(local, -1);
966 if (local->open_count == 0) {
967 ieee80211_stop_device(local);
969 /* no reconfiguring after stop! */
973 /* do after stop to avoid reconfiguring when we stop anyway */
974 ieee80211_configure_filter(local);
975 ieee80211_hw_config(local, hw_reconf_flags);
977 if (local->monitors == local->open_count)
978 ieee80211_add_virtual_monitor(local);
981 static int ieee80211_stop(struct net_device *dev)
983 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
985 ieee80211_do_stop(sdata, true);
990 static void ieee80211_set_multicast_list(struct net_device *dev)
992 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
993 struct ieee80211_local *local = sdata->local;
994 int allmulti, promisc, sdata_allmulti, sdata_promisc;
996 allmulti = !!(dev->flags & IFF_ALLMULTI);
997 promisc = !!(dev->flags & IFF_PROMISC);
998 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
999 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
1001 if (allmulti != sdata_allmulti) {
1002 if (dev->flags & IFF_ALLMULTI)
1003 atomic_inc(&local->iff_allmultis);
1005 atomic_dec(&local->iff_allmultis);
1006 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1009 if (promisc != sdata_promisc) {
1010 if (dev->flags & IFF_PROMISC)
1011 atomic_inc(&local->iff_promiscs);
1013 atomic_dec(&local->iff_promiscs);
1014 sdata->flags ^= IEEE80211_SDATA_PROMISC;
1018 * TODO: If somebody needs this on AP interfaces,
1019 * it can be enabled easily but multicast
1020 * addresses from VLANs need to be synced.
1022 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1023 sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1024 sdata->vif.type != NL80211_IFTYPE_AP)
1025 drv_set_multicast_list(local, sdata, &dev->mc);
1027 spin_lock_bh(&local->filter_lock);
1028 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
1029 spin_unlock_bh(&local->filter_lock);
1030 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
1034 * Called when the netdev is removed or, by the code below, before
1035 * the interface type changes.
1037 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1042 /* free extra data */
1043 ieee80211_free_keys(sdata);
1045 ieee80211_debugfs_remove_netdev(sdata);
1047 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1048 __skb_queue_purge(&sdata->fragments[i].skb_list);
1049 sdata->fragment_next = 0;
1051 if (ieee80211_vif_is_mesh(&sdata->vif))
1052 mesh_rmc_free(sdata);
1054 flushed = sta_info_flush(sdata);
1058 static void ieee80211_uninit(struct net_device *dev)
1060 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1063 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
1064 struct sk_buff *skb)
1066 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1069 static const struct net_device_ops ieee80211_dataif_ops = {
1070 .ndo_open = ieee80211_open,
1071 .ndo_stop = ieee80211_stop,
1072 .ndo_uninit = ieee80211_uninit,
1073 .ndo_start_xmit = ieee80211_subif_start_xmit,
1074 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1075 .ndo_change_mtu = ieee80211_change_mtu,
1076 .ndo_set_mac_address = ieee80211_change_mac,
1077 .ndo_select_queue = ieee80211_netdev_select_queue,
1080 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
1081 struct sk_buff *skb)
1083 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1084 struct ieee80211_local *local = sdata->local;
1085 struct ieee80211_hdr *hdr;
1086 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1088 if (local->hw.queues < IEEE80211_NUM_ACS)
1092 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
1093 return 0; /* doesn't matter, frame will be dropped */
1095 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
1097 return ieee80211_select_queue_80211(sdata, skb, hdr);
1100 static const struct net_device_ops ieee80211_monitorif_ops = {
1101 .ndo_open = ieee80211_open,
1102 .ndo_stop = ieee80211_stop,
1103 .ndo_uninit = ieee80211_uninit,
1104 .ndo_start_xmit = ieee80211_monitor_start_xmit,
1105 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1106 .ndo_change_mtu = ieee80211_change_mtu,
1107 .ndo_set_mac_address = ieee80211_change_mac,
1108 .ndo_select_queue = ieee80211_monitor_select_queue,
1111 static void ieee80211_if_setup(struct net_device *dev)
1114 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1115 dev->netdev_ops = &ieee80211_dataif_ops;
1116 dev->destructor = free_netdev;
1119 static void ieee80211_iface_work(struct work_struct *work)
1121 struct ieee80211_sub_if_data *sdata =
1122 container_of(work, struct ieee80211_sub_if_data, work);
1123 struct ieee80211_local *local = sdata->local;
1124 struct sk_buff *skb;
1125 struct sta_info *sta;
1126 struct ieee80211_ra_tid *ra_tid;
1128 if (!ieee80211_sdata_running(sdata))
1131 if (local->scanning)
1135 * ieee80211_queue_work() should have picked up most cases,
1136 * here we'll pick the rest.
1138 if (WARN(local->suspended,
1139 "interface work scheduled while going to suspend\n"))
1142 /* first process frames */
1143 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1144 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1146 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1147 ra_tid = (void *)&skb->cb;
1148 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1150 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1151 ra_tid = (void *)&skb->cb;
1152 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1154 } else if (ieee80211_is_action(mgmt->frame_control) &&
1155 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1158 mutex_lock(&local->sta_mtx);
1159 sta = sta_info_get_bss(sdata, mgmt->sa);
1161 switch (mgmt->u.action.u.addba_req.action_code) {
1162 case WLAN_ACTION_ADDBA_REQ:
1163 ieee80211_process_addba_request(
1164 local, sta, mgmt, len);
1166 case WLAN_ACTION_ADDBA_RESP:
1167 ieee80211_process_addba_resp(local, sta,
1170 case WLAN_ACTION_DELBA:
1171 ieee80211_process_delba(sdata, sta,
1179 mutex_unlock(&local->sta_mtx);
1180 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1181 struct ieee80211_hdr *hdr = (void *)mgmt;
1183 * So the frame isn't mgmt, but frame_control
1184 * is at the right place anyway, of course, so
1185 * the if statement is correct.
1187 * Warn if we have other data frame types here,
1188 * they must not get here.
1190 WARN_ON(hdr->frame_control &
1191 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1192 WARN_ON(!(hdr->seq_ctrl &
1193 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1195 * This was a fragment of a frame, received while
1196 * a block-ack session was active. That cannot be
1197 * right, so terminate the session.
1199 mutex_lock(&local->sta_mtx);
1200 sta = sta_info_get_bss(sdata, mgmt->sa);
1202 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1203 IEEE80211_QOS_CTL_TID_MASK;
1205 __ieee80211_stop_rx_ba_session(
1206 sta, tid, WLAN_BACK_RECIPIENT,
1207 WLAN_REASON_QSTA_REQUIRE_SETUP,
1210 mutex_unlock(&local->sta_mtx);
1211 } else switch (sdata->vif.type) {
1212 case NL80211_IFTYPE_STATION:
1213 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1215 case NL80211_IFTYPE_ADHOC:
1216 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1218 case NL80211_IFTYPE_MESH_POINT:
1219 if (!ieee80211_vif_is_mesh(&sdata->vif))
1221 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1224 WARN(1, "frame for unexpected interface type");
1231 /* then other type-dependent work */
1232 switch (sdata->vif.type) {
1233 case NL80211_IFTYPE_STATION:
1234 ieee80211_sta_work(sdata);
1236 case NL80211_IFTYPE_ADHOC:
1237 ieee80211_ibss_work(sdata);
1239 case NL80211_IFTYPE_MESH_POINT:
1240 if (!ieee80211_vif_is_mesh(&sdata->vif))
1242 ieee80211_mesh_work(sdata);
1249 static void ieee80211_recalc_smps_work(struct work_struct *work)
1251 struct ieee80211_sub_if_data *sdata =
1252 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1254 ieee80211_recalc_smps(sdata);
1258 * Helper function to initialise an interface to a specific type.
1260 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1261 enum nl80211_iftype type)
1263 /* clear type-dependent union */
1264 memset(&sdata->u, 0, sizeof(sdata->u));
1266 /* and set some type-dependent values */
1267 sdata->vif.type = type;
1268 sdata->vif.p2p = false;
1269 sdata->wdev.iftype = type;
1271 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1272 sdata->control_port_no_encrypt = false;
1274 sdata->noack_map = 0;
1276 /* only monitor/p2p-device differ */
1278 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1279 sdata->dev->type = ARPHRD_ETHER;
1282 skb_queue_head_init(&sdata->skb_queue);
1283 INIT_WORK(&sdata->work, ieee80211_iface_work);
1284 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1285 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
1288 case NL80211_IFTYPE_P2P_GO:
1289 type = NL80211_IFTYPE_AP;
1290 sdata->vif.type = type;
1291 sdata->vif.p2p = true;
1293 case NL80211_IFTYPE_AP:
1294 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1295 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1296 INIT_WORK(&sdata->u.ap.request_smps_work,
1297 ieee80211_request_smps_ap_work);
1298 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1299 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
1301 case NL80211_IFTYPE_P2P_CLIENT:
1302 type = NL80211_IFTYPE_STATION;
1303 sdata->vif.type = type;
1304 sdata->vif.p2p = true;
1306 case NL80211_IFTYPE_STATION:
1307 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1308 ieee80211_sta_setup_sdata(sdata);
1310 case NL80211_IFTYPE_ADHOC:
1311 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1312 ieee80211_ibss_setup_sdata(sdata);
1314 case NL80211_IFTYPE_MESH_POINT:
1315 if (ieee80211_vif_is_mesh(&sdata->vif))
1316 ieee80211_mesh_init_sdata(sdata);
1318 case NL80211_IFTYPE_MONITOR:
1319 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1320 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1321 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1322 MONITOR_FLAG_OTHER_BSS;
1324 case NL80211_IFTYPE_WDS:
1325 sdata->vif.bss_conf.bssid = NULL;
1327 case NL80211_IFTYPE_AP_VLAN:
1328 case NL80211_IFTYPE_P2P_DEVICE:
1329 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1331 case NL80211_IFTYPE_UNSPECIFIED:
1332 case NUM_NL80211_IFTYPES:
1337 ieee80211_debugfs_add_netdev(sdata);
1340 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1341 enum nl80211_iftype type)
1343 struct ieee80211_local *local = sdata->local;
1345 enum nl80211_iftype internal_type = type;
1350 if (!local->ops->change_interface)
1353 switch (sdata->vif.type) {
1354 case NL80211_IFTYPE_AP:
1355 case NL80211_IFTYPE_STATION:
1356 case NL80211_IFTYPE_ADHOC:
1358 * Could maybe also all others here?
1359 * Just not sure how that interacts
1360 * with the RX/config path e.g. for
1369 case NL80211_IFTYPE_AP:
1370 case NL80211_IFTYPE_STATION:
1371 case NL80211_IFTYPE_ADHOC:
1373 * Could probably support everything
1374 * but WDS here (WDS do_open can fail
1375 * under memory pressure, which this
1376 * code isn't prepared to handle).
1379 case NL80211_IFTYPE_P2P_CLIENT:
1381 internal_type = NL80211_IFTYPE_STATION;
1383 case NL80211_IFTYPE_P2P_GO:
1385 internal_type = NL80211_IFTYPE_AP;
1391 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1395 ieee80211_do_stop(sdata, false);
1397 ieee80211_teardown_sdata(sdata);
1399 ret = drv_change_interface(local, sdata, internal_type, p2p);
1401 type = ieee80211_vif_type_p2p(&sdata->vif);
1404 * Ignore return value here, there's not much we can do since
1405 * the driver changed the interface type internally already.
1406 * The warnings will hopefully make driver authors fix it :-)
1408 ieee80211_check_queues(sdata, type);
1410 ieee80211_setup_sdata(sdata, type);
1412 err = ieee80211_do_open(&sdata->wdev, false);
1413 WARN(err, "type change: do_open returned %d", err);
1418 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1419 enum nl80211_iftype type)
1425 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1428 if (ieee80211_sdata_running(sdata)) {
1429 ret = ieee80211_runtime_change_iftype(sdata, type);
1433 /* Purge and reset type-dependent state. */
1434 ieee80211_teardown_sdata(sdata);
1435 ieee80211_setup_sdata(sdata, type);
1438 /* reset some values that shouldn't be kept across type changes */
1439 sdata->drop_unencrypted = 0;
1440 if (type == NL80211_IFTYPE_STATION)
1441 sdata->u.mgd.use_4addr = false;
1446 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1447 u8 *perm_addr, enum nl80211_iftype type)
1449 struct ieee80211_sub_if_data *sdata;
1450 u64 mask, start, addr, val, inc;
1452 u8 tmp_addr[ETH_ALEN];
1455 /* default ... something at least */
1456 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1458 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1459 local->hw.wiphy->n_addresses <= 1)
1462 mutex_lock(&local->iflist_mtx);
1465 case NL80211_IFTYPE_MONITOR:
1466 /* doesn't matter */
1468 case NL80211_IFTYPE_WDS:
1469 case NL80211_IFTYPE_AP_VLAN:
1470 /* match up with an AP interface */
1471 list_for_each_entry(sdata, &local->interfaces, list) {
1472 if (sdata->vif.type != NL80211_IFTYPE_AP)
1474 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1477 /* keep default if no AP interface present */
1479 case NL80211_IFTYPE_P2P_CLIENT:
1480 case NL80211_IFTYPE_P2P_GO:
1481 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1482 list_for_each_entry(sdata, &local->interfaces, list) {
1483 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1485 if (!ieee80211_sdata_running(sdata))
1487 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1491 /* otherwise fall through */
1493 /* assign a new address if possible -- try n_addresses first */
1494 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1497 list_for_each_entry(sdata, &local->interfaces, list) {
1498 if (memcmp(local->hw.wiphy->addresses[i].addr,
1499 sdata->vif.addr, ETH_ALEN) == 0) {
1507 local->hw.wiphy->addresses[i].addr,
1513 /* try mask if available */
1514 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1517 m = local->hw.wiphy->addr_mask;
1518 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1519 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1520 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1522 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1523 /* not a contiguous mask ... not handled now! */
1524 pr_info("not contiguous\n");
1529 * Pick address of existing interface in case user changed
1530 * MAC address manually, default to perm_addr.
1532 m = local->hw.wiphy->perm_addr;
1533 list_for_each_entry(sdata, &local->interfaces, list) {
1534 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1536 m = sdata->vif.addr;
1539 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1540 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1541 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1543 inc = 1ULL<<__ffs64(mask);
1544 val = (start & mask);
1545 addr = (start & ~mask) | (val & mask);
1549 tmp_addr[5] = addr >> 0*8;
1550 tmp_addr[4] = addr >> 1*8;
1551 tmp_addr[3] = addr >> 2*8;
1552 tmp_addr[2] = addr >> 3*8;
1553 tmp_addr[1] = addr >> 4*8;
1554 tmp_addr[0] = addr >> 5*8;
1558 list_for_each_entry(sdata, &local->interfaces, list) {
1559 if (memcmp(tmp_addr, sdata->vif.addr,
1567 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1570 addr = (start & ~mask) | (val & mask);
1571 } while (addr != start);
1577 mutex_unlock(&local->iflist_mtx);
1580 static void ieee80211_cleanup_sdata_stas_wk(struct work_struct *wk)
1582 struct ieee80211_sub_if_data *sdata;
1584 sdata = container_of(wk, struct ieee80211_sub_if_data, cleanup_stations_wk);
1586 ieee80211_cleanup_sdata_stas(sdata);
1589 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1590 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1591 struct vif_params *params)
1593 struct net_device *ndev = NULL;
1594 struct ieee80211_sub_if_data *sdata = NULL;
1600 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1601 struct wireless_dev *wdev;
1603 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1607 wdev = &sdata->wdev;
1610 strlcpy(sdata->name, name, IFNAMSIZ);
1611 ieee80211_assign_perm_addr(local, wdev->address, type);
1612 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1614 if (local->hw.queues >= IEEE80211_NUM_ACS)
1615 txqs = IEEE80211_NUM_ACS;
1617 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1618 local->hw.vif_data_size,
1619 name, ieee80211_if_setup, txqs, 1);
1622 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1624 ndev->needed_headroom = local->tx_headroom +
1625 4*6 /* four MAC addresses */
1626 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1628 + 8 /* rfc1042/bridge tunnel */
1629 - ETH_HLEN /* ethernet hard_header_len */
1630 + IEEE80211_ENCRYPT_HEADROOM;
1631 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1633 ret = dev_alloc_name(ndev, ndev->name);
1639 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1640 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1641 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1643 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1644 sdata = netdev_priv(ndev);
1645 ndev->ieee80211_ptr = &sdata->wdev;
1646 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1647 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1652 /* initialise type-independent data */
1653 sdata->wdev.wiphy = local->hw.wiphy;
1654 sdata->local = local;
1656 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1657 skb_queue_head_init(&sdata->fragments[i].skb_list);
1659 INIT_LIST_HEAD(&sdata->key_list);
1661 spin_lock_init(&sdata->cleanup_stations_lock);
1662 INIT_LIST_HEAD(&sdata->cleanup_stations);
1663 INIT_WORK(&sdata->cleanup_stations_wk, ieee80211_cleanup_sdata_stas_wk);
1664 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1665 ieee80211_dfs_cac_timer_work);
1666 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1667 ieee80211_delayed_tailroom_dec);
1669 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1670 struct ieee80211_supported_band *sband;
1671 sband = local->hw.wiphy->bands[i];
1672 sdata->rc_rateidx_mask[i] =
1673 sband ? (1 << sband->n_bitrates) - 1 : 0;
1675 memcpy(sdata->rc_rateidx_mcs_mask[i],
1676 sband->ht_cap.mcs.rx_mask,
1677 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1679 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1680 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1683 ieee80211_set_default_queues(sdata);
1685 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1686 sdata->user_power_level = local->user_power_level;
1688 /* setup type-dependent data */
1689 ieee80211_setup_sdata(sdata, type);
1693 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1694 if (type == NL80211_IFTYPE_STATION)
1695 sdata->u.mgd.use_4addr = params->use_4addr;
1698 ndev->features |= local->hw.netdev_features;
1700 ret = register_netdevice(ndev);
1707 mutex_lock(&local->iflist_mtx);
1708 list_add_tail_rcu(&sdata->list, &local->interfaces);
1709 mutex_unlock(&local->iflist_mtx);
1712 *new_wdev = &sdata->wdev;
1717 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1721 mutex_lock(&sdata->local->iflist_mtx);
1722 list_del_rcu(&sdata->list);
1723 mutex_unlock(&sdata->local->iflist_mtx);
1728 unregister_netdevice(sdata->dev);
1730 cfg80211_unregister_wdev(&sdata->wdev);
1735 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1737 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1739 ieee80211_do_stop(sdata, true);
1740 ieee80211_teardown_sdata(sdata);
1744 * Remove all interfaces, may only be called at hardware unregistration
1745 * time because it doesn't do RCU-safe list removals.
1747 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1749 struct ieee80211_sub_if_data *sdata, *tmp;
1750 LIST_HEAD(unreg_list);
1751 LIST_HEAD(wdev_list);
1756 * Close all AP_VLAN interfaces first, as otherwise they
1757 * might be closed while the AP interface they belong to
1758 * is closed, causing unregister_netdevice_many() to crash.
1760 list_for_each_entry(sdata, &local->interfaces, list)
1761 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1762 dev_close(sdata->dev);
1764 mutex_lock(&local->iflist_mtx);
1765 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1766 list_del(&sdata->list);
1769 unregister_netdevice_queue(sdata->dev, &unreg_list);
1771 list_add(&sdata->list, &wdev_list);
1773 mutex_unlock(&local->iflist_mtx);
1774 unregister_netdevice_many(&unreg_list);
1775 list_del(&unreg_list);
1777 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1778 list_del(&sdata->list);
1779 cfg80211_unregister_wdev(&sdata->wdev);
1784 static int netdev_notify(struct notifier_block *nb,
1785 unsigned long state, void *ptr)
1787 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1788 struct ieee80211_sub_if_data *sdata;
1790 if (state != NETDEV_CHANGENAME)
1793 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1796 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1799 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1801 memcpy(sdata->name, dev->name, IFNAMSIZ);
1803 ieee80211_debugfs_rename_netdev(sdata);
1807 static struct notifier_block mac80211_netdev_notifier = {
1808 .notifier_call = netdev_notify,
1811 int ieee80211_iface_init(void)
1813 return register_netdevice_notifier(&mac80211_netdev_notifier);
1816 void ieee80211_iface_exit(void)
1818 unregister_netdevice_notifier(&mac80211_netdev_notifier);