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 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
406 ieee80211_set_default_queues(sdata);
408 ret = drv_add_interface(local, sdata);
410 /* ok .. stupid driver, it asked for this! */
415 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
421 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
422 IEEE80211_CHANCTX_EXCLUSIVE);
424 drv_remove_interface(local, sdata);
429 mutex_lock(&local->iflist_mtx);
430 rcu_assign_pointer(local->monitor_sdata, sdata);
431 mutex_unlock(&local->iflist_mtx);
436 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
438 struct ieee80211_sub_if_data *sdata;
440 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
445 mutex_lock(&local->iflist_mtx);
447 sdata = rcu_dereference_protected(local->monitor_sdata,
448 lockdep_is_held(&local->iflist_mtx));
450 mutex_unlock(&local->iflist_mtx);
454 rcu_assign_pointer(local->monitor_sdata, NULL);
455 mutex_unlock(&local->iflist_mtx);
459 ieee80211_vif_release_channel(sdata);
461 drv_remove_interface(local, sdata);
467 * NOTE: Be very careful when changing this function, it must NOT return
468 * an error on interface type changes that have been pre-checked, so most
469 * checks should be in ieee80211_check_concurrent_iface.
471 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
473 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
474 struct net_device *dev = wdev->netdev;
475 struct ieee80211_local *local = sdata->local;
476 struct sta_info *sta;
479 u32 hw_reconf_flags = 0;
481 switch (sdata->vif.type) {
482 case NL80211_IFTYPE_WDS:
483 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
486 case NL80211_IFTYPE_AP_VLAN: {
487 struct ieee80211_sub_if_data *master;
492 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
494 master = container_of(sdata->bss,
495 struct ieee80211_sub_if_data, u.ap);
496 sdata->control_port_protocol =
497 master->control_port_protocol;
498 sdata->control_port_no_encrypt =
499 master->control_port_no_encrypt;
500 sdata->vif.cab_queue = master->vif.cab_queue;
501 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
502 sizeof(sdata->vif.hw_queue));
505 case NL80211_IFTYPE_AP:
506 sdata->bss = &sdata->u.ap;
508 case NL80211_IFTYPE_MESH_POINT:
509 case NL80211_IFTYPE_STATION:
510 case NL80211_IFTYPE_MONITOR:
511 case NL80211_IFTYPE_ADHOC:
512 case NL80211_IFTYPE_P2P_DEVICE:
513 /* no special treatment */
515 case NL80211_IFTYPE_UNSPECIFIED:
516 case NUM_NL80211_IFTYPES:
517 case NL80211_IFTYPE_P2P_CLIENT:
518 case NL80211_IFTYPE_P2P_GO:
524 if (local->open_count == 0) {
525 res = drv_start(local);
528 /* we're brought up, everything changes */
529 hw_reconf_flags = ~0;
530 ieee80211_led_radio(local, true);
531 ieee80211_mod_tpt_led_trig(local,
532 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
536 * Copy the hopefully now-present MAC address to
537 * this interface, if it has the special null one.
539 if (dev && is_zero_ether_addr(dev->dev_addr)) {
540 memcpy(dev->dev_addr,
541 local->hw.wiphy->perm_addr,
543 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
545 if (!is_valid_ether_addr(dev->dev_addr)) {
546 res = -EADDRNOTAVAIL;
551 switch (sdata->vif.type) {
552 case NL80211_IFTYPE_AP_VLAN:
553 /* no need to tell driver, but set carrier and chanctx */
554 if (rtnl_dereference(sdata->bss->beacon)) {
555 ieee80211_vif_vlan_copy_chanctx(sdata);
556 netif_carrier_on(dev);
558 netif_carrier_off(dev);
561 case NL80211_IFTYPE_MONITOR:
562 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
563 local->cooked_mntrs++;
567 if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) {
568 res = drv_add_interface(local, sdata);
571 } else if (local->monitors == 0 && local->open_count == 0) {
572 res = ieee80211_add_virtual_monitor(local);
577 /* must be before the call to ieee80211_configure_filter */
579 if (local->monitors == 1) {
580 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
581 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
584 ieee80211_adjust_monitor_flags(sdata, 1);
585 ieee80211_configure_filter(local);
586 mutex_lock(&local->mtx);
587 ieee80211_recalc_idle(local);
588 mutex_unlock(&local->mtx);
590 netif_carrier_on(dev);
594 ieee80211_del_virtual_monitor(local);
596 res = drv_add_interface(local, sdata);
599 res = ieee80211_check_queues(sdata,
600 ieee80211_vif_type_p2p(&sdata->vif));
602 goto err_del_interface;
605 if (sdata->vif.type == NL80211_IFTYPE_AP) {
607 local->fif_probe_req++;
609 ieee80211_configure_filter(local);
610 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
611 local->fif_probe_req++;
614 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
615 changed |= ieee80211_reset_erp_info(sdata);
616 ieee80211_bss_info_change_notify(sdata, changed);
618 switch (sdata->vif.type) {
619 case NL80211_IFTYPE_STATION:
620 case NL80211_IFTYPE_ADHOC:
621 case NL80211_IFTYPE_AP:
622 case NL80211_IFTYPE_MESH_POINT:
623 netif_carrier_off(dev);
625 case NL80211_IFTYPE_WDS:
626 case NL80211_IFTYPE_P2P_DEVICE:
634 * set default queue parameters so drivers don't
635 * need to initialise the hardware if the hardware
636 * doesn't start up with sane defaults
638 ieee80211_set_wmm_default(sdata, true);
641 set_bit(SDATA_STATE_RUNNING, &sdata->state);
643 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
644 /* Create STA entry for the WDS peer */
645 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
649 goto err_del_interface;
652 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
653 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
654 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
656 res = sta_info_insert(sta);
658 /* STA has been freed */
659 goto err_del_interface;
662 rate_control_rate_init(sta);
663 netif_carrier_on(dev);
664 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
665 rcu_assign_pointer(local->p2p_sdata, sdata);
669 * set_multicast_list will be invoked by the networking core
670 * which will check whether any increments here were done in
671 * error and sync them down to the hardware as filter flags.
673 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
674 atomic_inc(&local->iff_allmultis);
676 if (sdata->flags & IEEE80211_SDATA_PROMISC)
677 atomic_inc(&local->iff_promiscs);
683 ieee80211_hw_config(local, hw_reconf_flags);
685 ieee80211_recalc_ps(local, -1);
687 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
688 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
689 /* XXX: for AP_VLAN, actually track AP queues */
690 netif_tx_start_all_queues(dev);
693 int n_acs = IEEE80211_NUM_ACS;
696 if (local->hw.queues < IEEE80211_NUM_ACS)
699 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
700 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
701 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
702 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
703 for (ac = 0; ac < n_acs; ac++) {
704 int ac_queue = sdata->vif.hw_queue[ac];
706 if (local->queue_stop_reasons[ac_queue] == 0 &&
707 skb_queue_empty(&local->pending[ac_queue]))
708 netif_start_subqueue(dev, ac);
711 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
716 drv_remove_interface(local, sdata);
718 if (!local->open_count)
722 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
723 list_del(&sdata->u.vlan.list);
724 /* might already be clear but that doesn't matter */
725 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
729 static int ieee80211_open(struct net_device *dev)
731 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
734 /* fail early if user set an invalid address */
735 if (!is_valid_ether_addr(dev->dev_addr))
736 return -EADDRNOTAVAIL;
738 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
742 return ieee80211_do_open(&sdata->wdev, true);
745 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
748 struct ieee80211_local *local = sdata->local;
750 struct sk_buff *skb, *tmp;
751 u32 hw_reconf_flags = 0;
754 struct cfg80211_chan_def chandef;
756 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
758 if (rcu_access_pointer(local->scan_sdata) == sdata)
759 ieee80211_scan_cancel(local);
762 * Stop TX on this interface first.
765 netif_tx_stop_all_queues(sdata->dev);
767 ieee80211_roc_purge(local, sdata);
769 if (sdata->vif.type == NL80211_IFTYPE_STATION)
770 ieee80211_mgd_stop(sdata);
772 if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
773 ieee80211_ibss_stop(sdata);
777 * Remove all stations associated with this interface.
779 * This must be done before calling ops->remove_interface()
780 * because otherwise we can later invoke ops->sta_notify()
781 * whenever the STAs are removed, and that invalidates driver
782 * assumptions about always getting a vif pointer that is valid
783 * (because if we remove a STA after ops->remove_interface()
784 * the driver will have removed the vif info already!)
786 * This is relevant only in WDS mode, in all other modes we've
787 * already removed all stations when disconnecting or similar,
790 flushed = sta_info_flush(sdata);
791 WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
792 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
794 /* don't count this interface for promisc/allmulti while it is down */
795 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
796 atomic_dec(&local->iff_allmultis);
798 if (sdata->flags & IEEE80211_SDATA_PROMISC)
799 atomic_dec(&local->iff_promiscs);
801 if (sdata->vif.type == NL80211_IFTYPE_AP) {
803 local->fif_probe_req--;
804 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
805 local->fif_probe_req--;
809 netif_addr_lock_bh(sdata->dev);
810 spin_lock_bh(&local->filter_lock);
811 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
812 sdata->dev->addr_len);
813 spin_unlock_bh(&local->filter_lock);
814 netif_addr_unlock_bh(sdata->dev);
817 del_timer_sync(&local->dynamic_ps_timer);
818 cancel_work_sync(&local->dynamic_ps_enable_work);
820 cancel_work_sync(&sdata->recalc_smps);
821 sdata->vif.csa_active = false;
822 cancel_work_sync(&sdata->csa_finalize_work);
824 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
826 if (sdata->wdev.cac_started) {
827 chandef = sdata->vif.bss_conf.chandef;
828 WARN_ON(local->suspended);
829 mutex_lock(&local->iflist_mtx);
830 ieee80211_vif_release_channel(sdata);
831 mutex_unlock(&local->iflist_mtx);
832 cfg80211_cac_event(sdata->dev, &chandef,
833 NL80211_RADAR_CAC_ABORTED,
837 /* APs need special treatment */
838 if (sdata->vif.type == NL80211_IFTYPE_AP) {
839 struct ieee80211_sub_if_data *vlan, *tmpsdata;
841 /* down all dependent devices, that is VLANs */
842 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
844 dev_close(vlan->dev);
845 WARN_ON(!list_empty(&sdata->u.ap.vlans));
846 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
847 /* remove all packets in parent bc_buf pointing to this dev */
848 ps = &sdata->bss->ps;
850 spin_lock_irqsave(&ps->bc_buf.lock, flags);
851 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
852 if (skb->dev == sdata->dev) {
853 __skb_unlink(skb, &ps->bc_buf);
854 local->total_ps_buffered--;
855 ieee80211_free_txskb(&local->hw, skb);
858 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
864 switch (sdata->vif.type) {
865 case NL80211_IFTYPE_AP_VLAN:
866 list_del(&sdata->u.vlan.list);
867 rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
868 /* no need to tell driver */
870 case NL80211_IFTYPE_MONITOR:
871 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
872 local->cooked_mntrs--;
877 if (local->monitors == 0) {
878 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
879 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
882 ieee80211_adjust_monitor_flags(sdata, -1);
884 case NL80211_IFTYPE_P2P_DEVICE:
885 /* relies on synchronize_rcu() below */
886 rcu_assign_pointer(local->p2p_sdata, NULL);
889 cancel_work_sync(&sdata->work);
891 * When we get here, the interface is marked down.
893 * We need synchronize_rcu() to wait for the RX path in
894 * case it is using the interface and enqueuing frames
895 * at this very time on another CPU.
900 * Free all remaining keys, there shouldn't be any,
901 * except maybe in WDS mode?
903 ieee80211_free_keys(sdata);
906 case NL80211_IFTYPE_AP:
907 skb_queue_purge(&sdata->skb_queue);
912 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
913 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
914 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
915 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
916 if (info->control.vif == &sdata->vif) {
917 __skb_unlink(skb, &local->pending[i]);
918 ieee80211_free_txskb(&local->hw, skb);
922 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
924 if (local->open_count == 0)
925 ieee80211_clear_tx_pending(local);
928 * If the interface goes down while suspended, presumably because
929 * the device was unplugged and that happens before our resume,
930 * then the driver is already unconfigured and the remainder of
931 * this function isn't needed.
932 * XXX: what about WoWLAN? If the device has software state, e.g.
933 * memory allocated, it might expect teardown commands from
936 if (local->suspended) {
937 WARN_ON(local->wowlan);
938 WARN_ON(rtnl_dereference(local->monitor_sdata));
942 switch (sdata->vif.type) {
943 case NL80211_IFTYPE_AP_VLAN:
945 case NL80211_IFTYPE_MONITOR:
946 if (local->monitors == 0)
947 ieee80211_del_virtual_monitor(local);
949 mutex_lock(&local->mtx);
950 ieee80211_recalc_idle(local);
951 mutex_unlock(&local->mtx);
953 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
959 drv_remove_interface(local, sdata);
962 ieee80211_recalc_ps(local, -1);
964 if (local->open_count == 0) {
965 ieee80211_stop_device(local);
967 /* no reconfiguring after stop! */
971 /* do after stop to avoid reconfiguring when we stop anyway */
972 ieee80211_configure_filter(local);
973 ieee80211_hw_config(local, hw_reconf_flags);
975 if (local->monitors == local->open_count)
976 ieee80211_add_virtual_monitor(local);
979 static int ieee80211_stop(struct net_device *dev)
981 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
983 ieee80211_do_stop(sdata, true);
988 static void ieee80211_set_multicast_list(struct net_device *dev)
990 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
991 struct ieee80211_local *local = sdata->local;
992 int allmulti, promisc, sdata_allmulti, sdata_promisc;
994 allmulti = !!(dev->flags & IFF_ALLMULTI);
995 promisc = !!(dev->flags & IFF_PROMISC);
996 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
997 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
999 if (allmulti != sdata_allmulti) {
1000 if (dev->flags & IFF_ALLMULTI)
1001 atomic_inc(&local->iff_allmultis);
1003 atomic_dec(&local->iff_allmultis);
1004 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1007 if (promisc != sdata_promisc) {
1008 if (dev->flags & IFF_PROMISC)
1009 atomic_inc(&local->iff_promiscs);
1011 atomic_dec(&local->iff_promiscs);
1012 sdata->flags ^= IEEE80211_SDATA_PROMISC;
1014 spin_lock_bh(&local->filter_lock);
1015 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
1016 spin_unlock_bh(&local->filter_lock);
1017 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
1021 * Called when the netdev is removed or, by the code below, before
1022 * the interface type changes.
1024 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1028 /* free extra data */
1029 ieee80211_free_keys(sdata);
1031 ieee80211_debugfs_remove_netdev(sdata);
1033 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1034 __skb_queue_purge(&sdata->fragments[i].skb_list);
1035 sdata->fragment_next = 0;
1037 if (ieee80211_vif_is_mesh(&sdata->vif))
1038 mesh_rmc_free(sdata);
1041 static void ieee80211_uninit(struct net_device *dev)
1043 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1046 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
1047 struct sk_buff *skb)
1049 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1052 static const struct net_device_ops ieee80211_dataif_ops = {
1053 .ndo_open = ieee80211_open,
1054 .ndo_stop = ieee80211_stop,
1055 .ndo_uninit = ieee80211_uninit,
1056 .ndo_start_xmit = ieee80211_subif_start_xmit,
1057 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1058 .ndo_change_mtu = ieee80211_change_mtu,
1059 .ndo_set_mac_address = ieee80211_change_mac,
1060 .ndo_select_queue = ieee80211_netdev_select_queue,
1063 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
1064 struct sk_buff *skb)
1066 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1067 struct ieee80211_local *local = sdata->local;
1068 struct ieee80211_hdr *hdr;
1069 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1071 if (local->hw.queues < IEEE80211_NUM_ACS)
1075 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
1076 return 0; /* doesn't matter, frame will be dropped */
1078 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
1080 return ieee80211_select_queue_80211(sdata, skb, hdr);
1083 static const struct net_device_ops ieee80211_monitorif_ops = {
1084 .ndo_open = ieee80211_open,
1085 .ndo_stop = ieee80211_stop,
1086 .ndo_uninit = ieee80211_uninit,
1087 .ndo_start_xmit = ieee80211_monitor_start_xmit,
1088 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1089 .ndo_change_mtu = ieee80211_change_mtu,
1090 .ndo_set_mac_address = ieee80211_change_mac,
1091 .ndo_select_queue = ieee80211_monitor_select_queue,
1094 static void ieee80211_if_setup(struct net_device *dev)
1097 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1098 dev->netdev_ops = &ieee80211_dataif_ops;
1099 dev->destructor = free_netdev;
1102 static void ieee80211_iface_work(struct work_struct *work)
1104 struct ieee80211_sub_if_data *sdata =
1105 container_of(work, struct ieee80211_sub_if_data, work);
1106 struct ieee80211_local *local = sdata->local;
1107 struct sk_buff *skb;
1108 struct sta_info *sta;
1109 struct ieee80211_ra_tid *ra_tid;
1111 if (!ieee80211_sdata_running(sdata))
1114 if (local->scanning)
1118 * ieee80211_queue_work() should have picked up most cases,
1119 * here we'll pick the rest.
1121 if (WARN(local->suspended,
1122 "interface work scheduled while going to suspend\n"))
1125 /* first process frames */
1126 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1127 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1129 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1130 ra_tid = (void *)&skb->cb;
1131 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1133 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1134 ra_tid = (void *)&skb->cb;
1135 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1137 } else if (ieee80211_is_action(mgmt->frame_control) &&
1138 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1141 mutex_lock(&local->sta_mtx);
1142 sta = sta_info_get_bss(sdata, mgmt->sa);
1144 switch (mgmt->u.action.u.addba_req.action_code) {
1145 case WLAN_ACTION_ADDBA_REQ:
1146 ieee80211_process_addba_request(
1147 local, sta, mgmt, len);
1149 case WLAN_ACTION_ADDBA_RESP:
1150 ieee80211_process_addba_resp(local, sta,
1153 case WLAN_ACTION_DELBA:
1154 ieee80211_process_delba(sdata, sta,
1162 mutex_unlock(&local->sta_mtx);
1163 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1164 struct ieee80211_hdr *hdr = (void *)mgmt;
1166 * So the frame isn't mgmt, but frame_control
1167 * is at the right place anyway, of course, so
1168 * the if statement is correct.
1170 * Warn if we have other data frame types here,
1171 * they must not get here.
1173 WARN_ON(hdr->frame_control &
1174 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1175 WARN_ON(!(hdr->seq_ctrl &
1176 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1178 * This was a fragment of a frame, received while
1179 * a block-ack session was active. That cannot be
1180 * right, so terminate the session.
1182 mutex_lock(&local->sta_mtx);
1183 sta = sta_info_get_bss(sdata, mgmt->sa);
1185 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1186 IEEE80211_QOS_CTL_TID_MASK;
1188 __ieee80211_stop_rx_ba_session(
1189 sta, tid, WLAN_BACK_RECIPIENT,
1190 WLAN_REASON_QSTA_REQUIRE_SETUP,
1193 mutex_unlock(&local->sta_mtx);
1194 } else switch (sdata->vif.type) {
1195 case NL80211_IFTYPE_STATION:
1196 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1198 case NL80211_IFTYPE_ADHOC:
1199 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1201 case NL80211_IFTYPE_MESH_POINT:
1202 if (!ieee80211_vif_is_mesh(&sdata->vif))
1204 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1207 WARN(1, "frame for unexpected interface type");
1214 /* then other type-dependent work */
1215 switch (sdata->vif.type) {
1216 case NL80211_IFTYPE_STATION:
1217 ieee80211_sta_work(sdata);
1219 case NL80211_IFTYPE_ADHOC:
1220 ieee80211_ibss_work(sdata);
1222 case NL80211_IFTYPE_MESH_POINT:
1223 if (!ieee80211_vif_is_mesh(&sdata->vif))
1225 ieee80211_mesh_work(sdata);
1232 static void ieee80211_recalc_smps_work(struct work_struct *work)
1234 struct ieee80211_sub_if_data *sdata =
1235 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1237 ieee80211_recalc_smps(sdata);
1241 * Helper function to initialise an interface to a specific type.
1243 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1244 enum nl80211_iftype type)
1246 /* clear type-dependent union */
1247 memset(&sdata->u, 0, sizeof(sdata->u));
1249 /* and set some type-dependent values */
1250 sdata->vif.type = type;
1251 sdata->vif.p2p = false;
1252 sdata->wdev.iftype = type;
1254 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1255 sdata->control_port_no_encrypt = false;
1256 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1258 sdata->noack_map = 0;
1260 /* only monitor/p2p-device differ */
1262 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1263 sdata->dev->type = ARPHRD_ETHER;
1266 skb_queue_head_init(&sdata->skb_queue);
1267 INIT_WORK(&sdata->work, ieee80211_iface_work);
1268 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1269 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
1272 case NL80211_IFTYPE_P2P_GO:
1273 type = NL80211_IFTYPE_AP;
1274 sdata->vif.type = type;
1275 sdata->vif.p2p = true;
1277 case NL80211_IFTYPE_AP:
1278 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1279 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1280 INIT_WORK(&sdata->u.ap.request_smps_work,
1281 ieee80211_request_smps_ap_work);
1282 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1283 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
1285 case NL80211_IFTYPE_P2P_CLIENT:
1286 type = NL80211_IFTYPE_STATION;
1287 sdata->vif.type = type;
1288 sdata->vif.p2p = true;
1290 case NL80211_IFTYPE_STATION:
1291 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1292 ieee80211_sta_setup_sdata(sdata);
1294 case NL80211_IFTYPE_ADHOC:
1295 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1296 ieee80211_ibss_setup_sdata(sdata);
1298 case NL80211_IFTYPE_MESH_POINT:
1299 if (ieee80211_vif_is_mesh(&sdata->vif))
1300 ieee80211_mesh_init_sdata(sdata);
1302 case NL80211_IFTYPE_MONITOR:
1303 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1304 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1305 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1306 MONITOR_FLAG_OTHER_BSS;
1308 case NL80211_IFTYPE_WDS:
1309 sdata->vif.bss_conf.bssid = NULL;
1311 case NL80211_IFTYPE_AP_VLAN:
1312 case NL80211_IFTYPE_P2P_DEVICE:
1313 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1315 case NL80211_IFTYPE_UNSPECIFIED:
1316 case NUM_NL80211_IFTYPES:
1321 ieee80211_debugfs_add_netdev(sdata);
1324 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1325 enum nl80211_iftype type)
1327 struct ieee80211_local *local = sdata->local;
1329 enum nl80211_iftype internal_type = type;
1334 if (!local->ops->change_interface)
1337 switch (sdata->vif.type) {
1338 case NL80211_IFTYPE_AP:
1339 case NL80211_IFTYPE_STATION:
1340 case NL80211_IFTYPE_ADHOC:
1342 * Could maybe also all others here?
1343 * Just not sure how that interacts
1344 * with the RX/config path e.g. for
1353 case NL80211_IFTYPE_AP:
1354 case NL80211_IFTYPE_STATION:
1355 case NL80211_IFTYPE_ADHOC:
1357 * Could probably support everything
1358 * but WDS here (WDS do_open can fail
1359 * under memory pressure, which this
1360 * code isn't prepared to handle).
1363 case NL80211_IFTYPE_P2P_CLIENT:
1365 internal_type = NL80211_IFTYPE_STATION;
1367 case NL80211_IFTYPE_P2P_GO:
1369 internal_type = NL80211_IFTYPE_AP;
1375 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1379 ieee80211_do_stop(sdata, false);
1381 ieee80211_teardown_sdata(sdata);
1383 ret = drv_change_interface(local, sdata, internal_type, p2p);
1385 type = ieee80211_vif_type_p2p(&sdata->vif);
1388 * Ignore return value here, there's not much we can do since
1389 * the driver changed the interface type internally already.
1390 * The warnings will hopefully make driver authors fix it :-)
1392 ieee80211_check_queues(sdata, type);
1394 ieee80211_setup_sdata(sdata, type);
1396 err = ieee80211_do_open(&sdata->wdev, false);
1397 WARN(err, "type change: do_open returned %d", err);
1402 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1403 enum nl80211_iftype type)
1409 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1412 if (ieee80211_sdata_running(sdata)) {
1413 ret = ieee80211_runtime_change_iftype(sdata, type);
1417 /* Purge and reset type-dependent state. */
1418 ieee80211_teardown_sdata(sdata);
1419 ieee80211_setup_sdata(sdata, type);
1422 /* reset some values that shouldn't be kept across type changes */
1423 sdata->drop_unencrypted = 0;
1424 if (type == NL80211_IFTYPE_STATION)
1425 sdata->u.mgd.use_4addr = false;
1430 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1431 u8 *perm_addr, enum nl80211_iftype type)
1433 struct ieee80211_sub_if_data *sdata;
1434 u64 mask, start, addr, val, inc;
1436 u8 tmp_addr[ETH_ALEN];
1439 /* default ... something at least */
1440 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1442 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1443 local->hw.wiphy->n_addresses <= 1)
1446 mutex_lock(&local->iflist_mtx);
1449 case NL80211_IFTYPE_MONITOR:
1450 /* doesn't matter */
1452 case NL80211_IFTYPE_WDS:
1453 case NL80211_IFTYPE_AP_VLAN:
1454 /* match up with an AP interface */
1455 list_for_each_entry(sdata, &local->interfaces, list) {
1456 if (sdata->vif.type != NL80211_IFTYPE_AP)
1458 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1461 /* keep default if no AP interface present */
1463 case NL80211_IFTYPE_P2P_CLIENT:
1464 case NL80211_IFTYPE_P2P_GO:
1465 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1466 list_for_each_entry(sdata, &local->interfaces, list) {
1467 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1469 if (!ieee80211_sdata_running(sdata))
1471 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1475 /* otherwise fall through */
1477 /* assign a new address if possible -- try n_addresses first */
1478 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1481 list_for_each_entry(sdata, &local->interfaces, list) {
1482 if (memcmp(local->hw.wiphy->addresses[i].addr,
1483 sdata->vif.addr, ETH_ALEN) == 0) {
1491 local->hw.wiphy->addresses[i].addr,
1497 /* try mask if available */
1498 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1501 m = local->hw.wiphy->addr_mask;
1502 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1503 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1504 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1506 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1507 /* not a contiguous mask ... not handled now! */
1508 pr_info("not contiguous\n");
1513 * Pick address of existing interface in case user changed
1514 * MAC address manually, default to perm_addr.
1516 m = local->hw.wiphy->perm_addr;
1517 list_for_each_entry(sdata, &local->interfaces, list) {
1518 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1520 m = sdata->vif.addr;
1523 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1524 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1525 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1527 inc = 1ULL<<__ffs64(mask);
1528 val = (start & mask);
1529 addr = (start & ~mask) | (val & mask);
1533 tmp_addr[5] = addr >> 0*8;
1534 tmp_addr[4] = addr >> 1*8;
1535 tmp_addr[3] = addr >> 2*8;
1536 tmp_addr[2] = addr >> 3*8;
1537 tmp_addr[1] = addr >> 4*8;
1538 tmp_addr[0] = addr >> 5*8;
1542 list_for_each_entry(sdata, &local->interfaces, list) {
1543 if (memcmp(tmp_addr, sdata->vif.addr,
1551 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1554 addr = (start & ~mask) | (val & mask);
1555 } while (addr != start);
1561 mutex_unlock(&local->iflist_mtx);
1564 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1565 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1566 struct vif_params *params)
1568 struct net_device *ndev = NULL;
1569 struct ieee80211_sub_if_data *sdata = NULL;
1575 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1576 struct wireless_dev *wdev;
1578 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1582 wdev = &sdata->wdev;
1585 strlcpy(sdata->name, name, IFNAMSIZ);
1586 ieee80211_assign_perm_addr(local, wdev->address, type);
1587 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1589 if (local->hw.queues >= IEEE80211_NUM_ACS)
1590 txqs = IEEE80211_NUM_ACS;
1592 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1593 local->hw.vif_data_size,
1594 name, ieee80211_if_setup, txqs, 1);
1597 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1599 ndev->needed_headroom = local->tx_headroom +
1600 4*6 /* four MAC addresses */
1601 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1603 + 8 /* rfc1042/bridge tunnel */
1604 - ETH_HLEN /* ethernet hard_header_len */
1605 + IEEE80211_ENCRYPT_HEADROOM;
1606 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1608 ret = dev_alloc_name(ndev, ndev->name);
1614 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1615 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1616 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1618 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1619 sdata = netdev_priv(ndev);
1620 ndev->ieee80211_ptr = &sdata->wdev;
1621 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1622 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1627 /* initialise type-independent data */
1628 sdata->wdev.wiphy = local->hw.wiphy;
1629 sdata->local = local;
1631 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1632 skb_queue_head_init(&sdata->fragments[i].skb_list);
1634 INIT_LIST_HEAD(&sdata->key_list);
1636 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1637 ieee80211_dfs_cac_timer_work);
1638 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1639 ieee80211_delayed_tailroom_dec);
1641 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1642 struct ieee80211_supported_band *sband;
1643 sband = local->hw.wiphy->bands[i];
1644 sdata->rc_rateidx_mask[i] =
1645 sband ? (1 << sband->n_bitrates) - 1 : 0;
1647 memcpy(sdata->rc_rateidx_mcs_mask[i],
1648 sband->ht_cap.mcs.rx_mask,
1649 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1651 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1652 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1655 ieee80211_set_default_queues(sdata);
1657 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1658 sdata->user_power_level = local->user_power_level;
1660 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1662 /* setup type-dependent data */
1663 ieee80211_setup_sdata(sdata, type);
1667 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1668 if (type == NL80211_IFTYPE_STATION)
1669 sdata->u.mgd.use_4addr = params->use_4addr;
1672 ndev->features |= local->hw.netdev_features;
1674 ret = register_netdevice(ndev);
1681 mutex_lock(&local->iflist_mtx);
1682 list_add_tail_rcu(&sdata->list, &local->interfaces);
1683 mutex_unlock(&local->iflist_mtx);
1686 *new_wdev = &sdata->wdev;
1691 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1695 mutex_lock(&sdata->local->iflist_mtx);
1696 list_del_rcu(&sdata->list);
1697 mutex_unlock(&sdata->local->iflist_mtx);
1702 unregister_netdevice(sdata->dev);
1704 cfg80211_unregister_wdev(&sdata->wdev);
1709 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1711 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1713 ieee80211_do_stop(sdata, true);
1714 ieee80211_teardown_sdata(sdata);
1718 * Remove all interfaces, may only be called at hardware unregistration
1719 * time because it doesn't do RCU-safe list removals.
1721 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1723 struct ieee80211_sub_if_data *sdata, *tmp;
1724 LIST_HEAD(unreg_list);
1725 LIST_HEAD(wdev_list);
1730 * Close all AP_VLAN interfaces first, as otherwise they
1731 * might be closed while the AP interface they belong to
1732 * is closed, causing unregister_netdevice_many() to crash.
1734 list_for_each_entry(sdata, &local->interfaces, list)
1735 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1736 dev_close(sdata->dev);
1738 mutex_lock(&local->iflist_mtx);
1739 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1740 list_del(&sdata->list);
1743 unregister_netdevice_queue(sdata->dev, &unreg_list);
1745 list_add(&sdata->list, &wdev_list);
1747 mutex_unlock(&local->iflist_mtx);
1748 unregister_netdevice_many(&unreg_list);
1749 list_del(&unreg_list);
1751 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1752 list_del(&sdata->list);
1753 cfg80211_unregister_wdev(&sdata->wdev);
1758 static int netdev_notify(struct notifier_block *nb,
1759 unsigned long state, void *ptr)
1761 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1762 struct ieee80211_sub_if_data *sdata;
1764 if (state != NETDEV_CHANGENAME)
1767 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1770 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1773 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1775 memcpy(sdata->name, dev->name, IFNAMSIZ);
1777 ieee80211_debugfs_rename_netdev(sdata);
1781 static struct notifier_block mac80211_netdev_notifier = {
1782 .notifier_call = netdev_notify,
1785 int ieee80211_iface_init(void)
1787 return register_netdevice_notifier(&mac80211_netdev_notifier);
1790 void ieee80211_iface_exit(void)
1792 unregister_netdevice_notifier(&mac80211_netdev_notifier);