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>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
9 * Copyright (c) 2016 Intel Deutschland GmbH
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
15 #include <linux/slab.h>
16 #include <linux/kernel.h>
17 #include <linux/if_arp.h>
18 #include <linux/netdevice.h>
19 #include <linux/rtnetlink.h>
20 #include <net/mac80211.h>
21 #include <net/ieee80211_radiotap.h>
22 #include "ieee80211_i.h"
24 #include "debugfs_netdev.h"
27 #include "driver-ops.h"
32 * DOC: Interface list locking
34 * The interface list in each struct ieee80211_local is protected
37 * (1) modifications may only be done under the RTNL
38 * (2) modifications and readers are protected against each other by
40 * (3) modifications are done in an RCU manner so atomic readers
41 * can traverse the list in RCU-safe blocks.
43 * As a consequence, reads (traversals) of the list can be protected
44 * by either the RTNL, the iflist_mtx or RCU.
47 static void ieee80211_iface_work(struct work_struct *work);
49 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
51 struct ieee80211_chanctx_conf *chanctx_conf;
55 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
61 power = ieee80211_chandef_max_power(&chanctx_conf->def);
64 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
65 power = min(power, sdata->user_power_level);
67 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
68 power = min(power, sdata->ap_power_level);
70 if (power != sdata->vif.bss_conf.txpower) {
71 sdata->vif.bss_conf.txpower = power;
72 ieee80211_hw_config(sdata->local, 0);
79 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
82 if (__ieee80211_recalc_txpower(sdata) ||
83 (update_bss && ieee80211_sdata_running(sdata)))
84 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
87 static u32 __ieee80211_idle_off(struct ieee80211_local *local)
89 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
92 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
93 return IEEE80211_CONF_CHANGE_IDLE;
96 static u32 __ieee80211_idle_on(struct ieee80211_local *local)
98 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
101 ieee80211_flush_queues(local, NULL, false);
103 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
104 return IEEE80211_CONF_CHANGE_IDLE;
107 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
110 bool working, scanning, active;
111 unsigned int led_trig_start = 0, led_trig_stop = 0;
113 lockdep_assert_held(&local->mtx);
115 active = force_active ||
116 !list_empty(&local->chanctx_list) ||
119 working = !local->ops->remain_on_channel &&
120 !list_empty(&local->roc_list);
122 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
123 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
125 if (working || scanning)
126 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
128 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
131 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
133 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
135 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
137 if (working || scanning || active)
138 return __ieee80211_idle_off(local);
139 return __ieee80211_idle_on(local);
142 u32 ieee80211_idle_off(struct ieee80211_local *local)
144 return __ieee80211_recalc_idle(local, true);
147 void ieee80211_recalc_idle(struct ieee80211_local *local)
149 u32 change = __ieee80211_recalc_idle(local, false);
151 ieee80211_hw_config(local, change);
154 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
156 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
163 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
166 struct ieee80211_local *local = sdata->local;
167 struct ieee80211_sub_if_data *iter;
172 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
176 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
177 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
178 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
180 m = local->hw.wiphy->addr_mask;
181 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
182 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
183 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
188 mutex_lock(&local->iflist_mtx);
189 list_for_each_entry(iter, &local->interfaces, list) {
193 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
194 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE))
198 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
199 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
200 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
202 if ((new & ~mask) != (tmp & ~mask)) {
207 mutex_unlock(&local->iflist_mtx);
212 static int ieee80211_change_mac(struct net_device *dev, void *addr)
214 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
215 struct sockaddr *sa = addr;
216 bool check_dup = true;
219 if (ieee80211_sdata_running(sdata))
222 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
223 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
226 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
230 ret = eth_mac_addr(dev, sa);
233 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
238 static inline int identical_mac_addr_allowed(int type1, int type2)
240 return type1 == NL80211_IFTYPE_MONITOR ||
241 type2 == NL80211_IFTYPE_MONITOR ||
242 type1 == NL80211_IFTYPE_P2P_DEVICE ||
243 type2 == NL80211_IFTYPE_P2P_DEVICE ||
244 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
245 (type1 == NL80211_IFTYPE_WDS &&
246 (type2 == NL80211_IFTYPE_WDS ||
247 type2 == NL80211_IFTYPE_AP)) ||
248 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
249 (type1 == NL80211_IFTYPE_AP_VLAN &&
250 (type2 == NL80211_IFTYPE_AP ||
251 type2 == NL80211_IFTYPE_AP_VLAN));
254 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
255 enum nl80211_iftype iftype)
257 struct ieee80211_local *local = sdata->local;
258 struct ieee80211_sub_if_data *nsdata;
263 /* we hold the RTNL here so can safely walk the list */
264 list_for_each_entry(nsdata, &local->interfaces, list) {
265 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
267 * Only OCB and monitor mode may coexist
269 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
270 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
271 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
272 nsdata->vif.type == NL80211_IFTYPE_OCB))
276 * Allow only a single IBSS interface to be up at any
277 * time. This is restricted because beacon distribution
278 * cannot work properly if both are in the same IBSS.
280 * To remove this restriction we'd have to disallow them
281 * from setting the same SSID on different IBSS interfaces
282 * belonging to the same hardware. Then, however, we're
283 * faced with having to adopt two different TSF timers...
285 if (iftype == NL80211_IFTYPE_ADHOC &&
286 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
289 * will not add another interface while any channel
292 if (nsdata->vif.csa_active)
296 * The remaining checks are only performed for interfaces
297 * with the same MAC address.
299 if (!ether_addr_equal(sdata->vif.addr,
304 * check whether it may have the same address
306 if (!identical_mac_addr_allowed(iftype,
311 * can only add VLANs to enabled APs
313 if (iftype == NL80211_IFTYPE_AP_VLAN &&
314 nsdata->vif.type == NL80211_IFTYPE_AP)
315 sdata->bss = &nsdata->u.ap;
319 mutex_lock(&local->chanctx_mtx);
320 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
321 mutex_unlock(&local->chanctx_mtx);
325 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
326 enum nl80211_iftype iftype)
328 int n_queues = sdata->local->hw.queues;
331 if (iftype == NL80211_IFTYPE_NAN)
334 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
335 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
336 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
337 IEEE80211_INVAL_HW_QUEUE))
339 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
345 if ((iftype != NL80211_IFTYPE_AP &&
346 iftype != NL80211_IFTYPE_P2P_GO &&
347 iftype != NL80211_IFTYPE_MESH_POINT) ||
348 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
349 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
353 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
356 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
362 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
365 struct ieee80211_local *local = sdata->local;
366 u32 flags = sdata->u.mntr.flags;
368 #define ADJUST(_f, _s) do { \
369 if (flags & MONITOR_FLAG_##_f) \
370 local->fif_##_s += offset; \
373 ADJUST(FCSFAIL, fcsfail);
374 ADJUST(PLCPFAIL, plcpfail);
375 ADJUST(CONTROL, control);
376 ADJUST(CONTROL, pspoll);
377 ADJUST(OTHER_BSS, other_bss);
382 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
384 struct ieee80211_local *local = sdata->local;
387 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
388 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
389 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
390 else if (local->hw.queues >= IEEE80211_NUM_ACS)
391 sdata->vif.hw_queue[i] = i;
393 sdata->vif.hw_queue[i] = 0;
395 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
398 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
400 struct ieee80211_sub_if_data *sdata;
403 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
408 if (local->monitor_sdata)
411 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
416 sdata->local = local;
417 sdata->vif.type = NL80211_IFTYPE_MONITOR;
418 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
419 wiphy_name(local->hw.wiphy));
420 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
422 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
424 ieee80211_set_default_queues(sdata);
426 ret = drv_add_interface(local, sdata);
428 /* ok .. stupid driver, it asked for this! */
433 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
439 mutex_lock(&local->iflist_mtx);
440 rcu_assign_pointer(local->monitor_sdata, sdata);
441 mutex_unlock(&local->iflist_mtx);
443 mutex_lock(&local->mtx);
444 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
445 IEEE80211_CHANCTX_EXCLUSIVE);
446 mutex_unlock(&local->mtx);
448 mutex_lock(&local->iflist_mtx);
449 RCU_INIT_POINTER(local->monitor_sdata, NULL);
450 mutex_unlock(&local->iflist_mtx);
452 drv_remove_interface(local, sdata);
457 skb_queue_head_init(&sdata->skb_queue);
458 INIT_WORK(&sdata->work, ieee80211_iface_work);
463 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
465 struct ieee80211_sub_if_data *sdata;
467 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
472 mutex_lock(&local->iflist_mtx);
474 sdata = rcu_dereference_protected(local->monitor_sdata,
475 lockdep_is_held(&local->iflist_mtx));
477 mutex_unlock(&local->iflist_mtx);
481 RCU_INIT_POINTER(local->monitor_sdata, NULL);
482 mutex_unlock(&local->iflist_mtx);
486 mutex_lock(&local->mtx);
487 ieee80211_vif_release_channel(sdata);
488 mutex_unlock(&local->mtx);
490 drv_remove_interface(local, sdata);
496 * NOTE: Be very careful when changing this function, it must NOT return
497 * an error on interface type changes that have been pre-checked, so most
498 * checks should be in ieee80211_check_concurrent_iface.
500 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
502 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
503 struct net_device *dev = wdev->netdev;
504 struct ieee80211_local *local = sdata->local;
505 struct sta_info *sta;
508 u32 hw_reconf_flags = 0;
510 switch (sdata->vif.type) {
511 case NL80211_IFTYPE_WDS:
512 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
515 case NL80211_IFTYPE_AP_VLAN: {
516 struct ieee80211_sub_if_data *master;
521 mutex_lock(&local->mtx);
522 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
523 mutex_unlock(&local->mtx);
525 master = container_of(sdata->bss,
526 struct ieee80211_sub_if_data, u.ap);
527 sdata->control_port_protocol =
528 master->control_port_protocol;
529 sdata->control_port_no_encrypt =
530 master->control_port_no_encrypt;
531 sdata->vif.cab_queue = master->vif.cab_queue;
532 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
533 sizeof(sdata->vif.hw_queue));
534 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
536 mutex_lock(&local->key_mtx);
537 sdata->crypto_tx_tailroom_needed_cnt +=
538 master->crypto_tx_tailroom_needed_cnt;
539 mutex_unlock(&local->key_mtx);
543 case NL80211_IFTYPE_AP:
544 sdata->bss = &sdata->u.ap;
546 case NL80211_IFTYPE_MESH_POINT:
547 case NL80211_IFTYPE_STATION:
548 case NL80211_IFTYPE_MONITOR:
549 case NL80211_IFTYPE_ADHOC:
550 case NL80211_IFTYPE_P2P_DEVICE:
551 case NL80211_IFTYPE_OCB:
552 case NL80211_IFTYPE_NAN:
553 /* no special treatment */
555 case NL80211_IFTYPE_UNSPECIFIED:
556 case NUM_NL80211_IFTYPES:
557 case NL80211_IFTYPE_P2P_CLIENT:
558 case NL80211_IFTYPE_P2P_GO:
564 if (local->open_count == 0) {
565 res = drv_start(local);
568 /* we're brought up, everything changes */
569 hw_reconf_flags = ~0;
570 ieee80211_led_radio(local, true);
571 ieee80211_mod_tpt_led_trig(local,
572 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
576 * Copy the hopefully now-present MAC address to
577 * this interface, if it has the special null one.
579 if (dev && is_zero_ether_addr(dev->dev_addr)) {
580 memcpy(dev->dev_addr,
581 local->hw.wiphy->perm_addr,
583 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
585 if (!is_valid_ether_addr(dev->dev_addr)) {
586 res = -EADDRNOTAVAIL;
591 switch (sdata->vif.type) {
592 case NL80211_IFTYPE_AP_VLAN:
593 /* no need to tell driver, but set carrier and chanctx */
594 if (rtnl_dereference(sdata->bss->beacon)) {
595 ieee80211_vif_vlan_copy_chanctx(sdata);
596 netif_carrier_on(dev);
598 netif_carrier_off(dev);
601 case NL80211_IFTYPE_MONITOR:
602 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
603 local->cooked_mntrs++;
607 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
608 res = drv_add_interface(local, sdata);
611 } else if (local->monitors == 0 && local->open_count == 0) {
612 res = ieee80211_add_virtual_monitor(local);
617 /* must be before the call to ieee80211_configure_filter */
619 if (local->monitors == 1) {
620 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
621 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
624 ieee80211_adjust_monitor_flags(sdata, 1);
625 ieee80211_configure_filter(local);
626 mutex_lock(&local->mtx);
627 ieee80211_recalc_idle(local);
628 mutex_unlock(&local->mtx);
630 netif_carrier_on(dev);
634 ieee80211_del_virtual_monitor(local);
636 res = drv_add_interface(local, sdata);
639 res = ieee80211_check_queues(sdata,
640 ieee80211_vif_type_p2p(&sdata->vif));
642 goto err_del_interface;
645 if (sdata->vif.type == NL80211_IFTYPE_AP) {
647 local->fif_probe_req++;
649 ieee80211_configure_filter(local);
650 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
651 local->fif_probe_req++;
654 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
655 sdata->vif.type != NL80211_IFTYPE_NAN)
656 changed |= ieee80211_reset_erp_info(sdata);
657 ieee80211_bss_info_change_notify(sdata, changed);
659 switch (sdata->vif.type) {
660 case NL80211_IFTYPE_STATION:
661 case NL80211_IFTYPE_ADHOC:
662 case NL80211_IFTYPE_AP:
663 case NL80211_IFTYPE_MESH_POINT:
664 case NL80211_IFTYPE_OCB:
665 netif_carrier_off(dev);
667 case NL80211_IFTYPE_WDS:
668 case NL80211_IFTYPE_P2P_DEVICE:
669 case NL80211_IFTYPE_NAN:
677 * Set default queue parameters so drivers don't
678 * need to initialise the hardware if the hardware
679 * doesn't start up with sane defaults.
680 * Enable QoS for anything but station interfaces.
682 ieee80211_set_wmm_default(sdata, true,
683 sdata->vif.type != NL80211_IFTYPE_STATION);
686 set_bit(SDATA_STATE_RUNNING, &sdata->state);
688 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
689 /* Create STA entry for the WDS peer */
690 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
694 goto err_del_interface;
697 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
698 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
699 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
701 res = sta_info_insert(sta);
703 /* STA has been freed */
704 goto err_del_interface;
707 rate_control_rate_init(sta);
708 netif_carrier_on(dev);
709 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
710 rcu_assign_pointer(local->p2p_sdata, sdata);
714 * set_multicast_list will be invoked by the networking core
715 * which will check whether any increments here were done in
716 * error and sync them down to the hardware as filter flags.
718 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
719 atomic_inc(&local->iff_allmultis);
725 ieee80211_hw_config(local, hw_reconf_flags);
727 ieee80211_recalc_ps(local);
729 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
730 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
731 local->ops->wake_tx_queue) {
732 /* XXX: for AP_VLAN, actually track AP queues */
733 netif_tx_start_all_queues(dev);
736 int n_acs = IEEE80211_NUM_ACS;
739 if (local->hw.queues < IEEE80211_NUM_ACS)
742 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
743 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
744 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
745 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
746 for (ac = 0; ac < n_acs; ac++) {
747 int ac_queue = sdata->vif.hw_queue[ac];
749 if (local->queue_stop_reasons[ac_queue] == 0 &&
750 skb_queue_empty(&local->pending[ac_queue]))
751 netif_start_subqueue(dev, ac);
754 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
759 drv_remove_interface(local, sdata);
761 if (!local->open_count)
765 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
766 mutex_lock(&local->mtx);
767 list_del(&sdata->u.vlan.list);
768 mutex_unlock(&local->mtx);
770 /* might already be clear but that doesn't matter */
771 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
775 static int ieee80211_open(struct net_device *dev)
777 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
780 /* fail early if user set an invalid address */
781 if (!is_valid_ether_addr(dev->dev_addr))
782 return -EADDRNOTAVAIL;
784 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
788 return ieee80211_do_open(&sdata->wdev, true);
791 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
794 struct ieee80211_sub_if_data *txq_sdata = sdata;
795 struct ieee80211_local *local = sdata->local;
796 struct fq *fq = &local->fq;
798 struct sk_buff *skb, *tmp;
799 u32 hw_reconf_flags = 0;
802 struct cfg80211_chan_def chandef;
804 struct cfg80211_nan_func *func;
806 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
808 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
810 ieee80211_scan_cancel(local);
813 * Stop TX on this interface first.
816 netif_tx_stop_all_queues(sdata->dev);
818 ieee80211_roc_purge(local, sdata);
820 switch (sdata->vif.type) {
821 case NL80211_IFTYPE_STATION:
822 ieee80211_mgd_stop(sdata);
824 case NL80211_IFTYPE_ADHOC:
825 ieee80211_ibss_stop(sdata);
827 case NL80211_IFTYPE_AP:
828 cancel_work_sync(&sdata->u.ap.request_smps_work);
835 * Remove all stations associated with this interface.
837 * This must be done before calling ops->remove_interface()
838 * because otherwise we can later invoke ops->sta_notify()
839 * whenever the STAs are removed, and that invalidates driver
840 * assumptions about always getting a vif pointer that is valid
841 * (because if we remove a STA after ops->remove_interface()
842 * the driver will have removed the vif info already!)
844 * In WDS mode a station must exist here and be flushed, for
845 * AP_VLANs stations may exist since there's nothing else that
846 * would have removed them, but in other modes there shouldn't
849 flushed = sta_info_flush(sdata);
850 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
851 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
852 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
854 /* don't count this interface for allmulti while it is down */
855 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
856 atomic_dec(&local->iff_allmultis);
858 if (sdata->vif.type == NL80211_IFTYPE_AP) {
860 local->fif_probe_req--;
861 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
862 local->fif_probe_req--;
866 netif_addr_lock_bh(sdata->dev);
867 spin_lock_bh(&local->filter_lock);
868 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
869 sdata->dev->addr_len);
870 spin_unlock_bh(&local->filter_lock);
871 netif_addr_unlock_bh(sdata->dev);
874 del_timer_sync(&local->dynamic_ps_timer);
875 cancel_work_sync(&local->dynamic_ps_enable_work);
877 cancel_work_sync(&sdata->recalc_smps);
879 mutex_lock(&local->mtx);
880 sdata->vif.csa_active = false;
881 if (sdata->vif.type == NL80211_IFTYPE_STATION)
882 sdata->u.mgd.csa_waiting_bcn = false;
883 if (sdata->csa_block_tx) {
884 ieee80211_wake_vif_queues(local, sdata,
885 IEEE80211_QUEUE_STOP_REASON_CSA);
886 sdata->csa_block_tx = false;
888 mutex_unlock(&local->mtx);
891 cancel_work_sync(&sdata->csa_finalize_work);
893 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
895 if (sdata->wdev.cac_started) {
896 chandef = sdata->vif.bss_conf.chandef;
897 WARN_ON(local->suspended);
898 mutex_lock(&local->mtx);
899 ieee80211_vif_release_channel(sdata);
900 mutex_unlock(&local->mtx);
901 cfg80211_cac_event(sdata->dev, &chandef,
902 NL80211_RADAR_CAC_ABORTED,
906 /* APs need special treatment */
907 if (sdata->vif.type == NL80211_IFTYPE_AP) {
908 struct ieee80211_sub_if_data *vlan, *tmpsdata;
910 /* down all dependent devices, that is VLANs */
911 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
913 dev_close(vlan->dev);
914 WARN_ON(!list_empty(&sdata->u.ap.vlans));
915 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
916 /* remove all packets in parent bc_buf pointing to this dev */
917 ps = &sdata->bss->ps;
919 spin_lock_irqsave(&ps->bc_buf.lock, flags);
920 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
921 if (skb->dev == sdata->dev) {
922 __skb_unlink(skb, &ps->bc_buf);
923 local->total_ps_buffered--;
924 ieee80211_free_txskb(&local->hw, skb);
927 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
933 switch (sdata->vif.type) {
934 case NL80211_IFTYPE_AP_VLAN:
935 txq_sdata = container_of(sdata->bss,
936 struct ieee80211_sub_if_data, u.ap);
938 mutex_lock(&local->mtx);
939 list_del(&sdata->u.vlan.list);
940 mutex_unlock(&local->mtx);
941 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
942 /* see comment in the default case below */
943 ieee80211_free_keys(sdata, true);
944 /* no need to tell driver */
946 case NL80211_IFTYPE_MONITOR:
947 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
948 local->cooked_mntrs--;
953 if (local->monitors == 0) {
954 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
955 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
958 ieee80211_adjust_monitor_flags(sdata, -1);
960 case NL80211_IFTYPE_NAN:
961 /* clean all the functions */
962 spin_lock_bh(&sdata->u.nan.func_lock);
964 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
965 idr_remove(&sdata->u.nan.function_inst_ids, i);
966 cfg80211_free_nan_func(func);
968 idr_destroy(&sdata->u.nan.function_inst_ids);
970 spin_unlock_bh(&sdata->u.nan.func_lock);
972 case NL80211_IFTYPE_P2P_DEVICE:
973 /* relies on synchronize_rcu() below */
974 RCU_INIT_POINTER(local->p2p_sdata, NULL);
977 cancel_work_sync(&sdata->work);
979 * When we get here, the interface is marked down.
980 * Free the remaining keys, if there are any
981 * (which can happen in AP mode if userspace sets
982 * keys before the interface is operating, and maybe
985 * Force the key freeing to always synchronize_net()
986 * to wait for the RX path in case it is using this
987 * interface enqueuing frames at this very time on
990 ieee80211_free_keys(sdata, true);
991 skb_queue_purge(&sdata->skb_queue);
996 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
997 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
998 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
999 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1000 if (info->control.vif == &sdata->vif) {
1001 __skb_unlink(skb, &local->pending[i]);
1002 ieee80211_free_txskb(&local->hw, skb);
1006 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1008 if (txq_sdata->vif.txq) {
1009 struct txq_info *txqi = to_txq_info(txq_sdata->vif.txq);
1014 * We really shouldn't purge the *entire* txqi since that
1015 * contains frames for the other AP_VLANs (and possibly
1016 * the AP itself) as well, but there's no API in FQ now
1017 * to be able to filter.
1020 spin_lock_bh(&fq->lock);
1021 ieee80211_txq_purge(local, txqi);
1022 spin_unlock_bh(&fq->lock);
1025 if (local->open_count == 0)
1026 ieee80211_clear_tx_pending(local);
1028 sdata->vif.bss_conf.beacon_int = 0;
1031 * If the interface goes down while suspended, presumably because
1032 * the device was unplugged and that happens before our resume,
1033 * then the driver is already unconfigured and the remainder of
1034 * this function isn't needed.
1035 * XXX: what about WoWLAN? If the device has software state, e.g.
1036 * memory allocated, it might expect teardown commands from
1039 if (local->suspended) {
1040 WARN_ON(local->wowlan);
1041 WARN_ON(rtnl_dereference(local->monitor_sdata));
1045 switch (sdata->vif.type) {
1046 case NL80211_IFTYPE_AP_VLAN:
1048 case NL80211_IFTYPE_MONITOR:
1049 if (local->monitors == 0)
1050 ieee80211_del_virtual_monitor(local);
1052 mutex_lock(&local->mtx);
1053 ieee80211_recalc_idle(local);
1054 mutex_unlock(&local->mtx);
1056 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
1062 drv_remove_interface(local, sdata);
1065 ieee80211_recalc_ps(local);
1068 flush_delayed_work(&local->scan_work);
1070 if (local->open_count == 0) {
1071 ieee80211_stop_device(local);
1073 /* no reconfiguring after stop! */
1077 /* do after stop to avoid reconfiguring when we stop anyway */
1078 ieee80211_configure_filter(local);
1079 ieee80211_hw_config(local, hw_reconf_flags);
1081 if (local->monitors == local->open_count)
1082 ieee80211_add_virtual_monitor(local);
1085 static int ieee80211_stop(struct net_device *dev)
1087 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1089 ieee80211_do_stop(sdata, true);
1094 static void ieee80211_set_multicast_list(struct net_device *dev)
1096 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1097 struct ieee80211_local *local = sdata->local;
1098 int allmulti, sdata_allmulti;
1100 allmulti = !!(dev->flags & IFF_ALLMULTI);
1101 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
1103 if (allmulti != sdata_allmulti) {
1104 if (dev->flags & IFF_ALLMULTI)
1105 atomic_inc(&local->iff_allmultis);
1107 atomic_dec(&local->iff_allmultis);
1108 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1111 spin_lock_bh(&local->filter_lock);
1112 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
1113 spin_unlock_bh(&local->filter_lock);
1114 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
1118 * Called when the netdev is removed or, by the code below, before
1119 * the interface type changes.
1121 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1123 /* free extra data */
1124 ieee80211_free_keys(sdata, false);
1126 ieee80211_debugfs_remove_netdev(sdata);
1128 ieee80211_destroy_frag_cache(&sdata->frags);
1130 if (ieee80211_vif_is_mesh(&sdata->vif))
1131 ieee80211_mesh_teardown_sdata(sdata);
1134 static void ieee80211_uninit(struct net_device *dev)
1136 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1139 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
1140 struct sk_buff *skb,
1142 select_queue_fallback_t fallback)
1144 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1147 static struct rtnl_link_stats64 *
1148 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1152 for_each_possible_cpu(i) {
1153 const struct pcpu_sw_netstats *tstats;
1154 u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
1157 tstats = per_cpu_ptr(dev->tstats, i);
1160 start = u64_stats_fetch_begin_irq(&tstats->syncp);
1161 rx_packets = tstats->rx_packets;
1162 tx_packets = tstats->tx_packets;
1163 rx_bytes = tstats->rx_bytes;
1164 tx_bytes = tstats->tx_bytes;
1165 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
1167 stats->rx_packets += rx_packets;
1168 stats->tx_packets += tx_packets;
1169 stats->rx_bytes += rx_bytes;
1170 stats->tx_bytes += tx_bytes;
1176 static const struct net_device_ops ieee80211_dataif_ops = {
1177 .ndo_open = ieee80211_open,
1178 .ndo_stop = ieee80211_stop,
1179 .ndo_uninit = ieee80211_uninit,
1180 .ndo_start_xmit = ieee80211_subif_start_xmit,
1181 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1182 .ndo_change_mtu = ieee80211_change_mtu,
1183 .ndo_set_mac_address = ieee80211_change_mac,
1184 .ndo_select_queue = ieee80211_netdev_select_queue,
1185 .ndo_get_stats64 = ieee80211_get_stats64,
1188 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
1189 struct sk_buff *skb,
1191 select_queue_fallback_t fallback)
1193 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1194 struct ieee80211_local *local = sdata->local;
1195 struct ieee80211_hdr *hdr;
1196 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1198 if (local->hw.queues < IEEE80211_NUM_ACS)
1202 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
1203 return 0; /* doesn't matter, frame will be dropped */
1205 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
1207 return ieee80211_select_queue_80211(sdata, skb, hdr);
1210 static const struct net_device_ops ieee80211_monitorif_ops = {
1211 .ndo_open = ieee80211_open,
1212 .ndo_stop = ieee80211_stop,
1213 .ndo_uninit = ieee80211_uninit,
1214 .ndo_start_xmit = ieee80211_monitor_start_xmit,
1215 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1216 .ndo_change_mtu = ieee80211_change_mtu,
1217 .ndo_set_mac_address = ieee80211_change_mac,
1218 .ndo_select_queue = ieee80211_monitor_select_queue,
1219 .ndo_get_stats64 = ieee80211_get_stats64,
1222 static void ieee80211_if_free(struct net_device *dev)
1224 free_percpu(dev->tstats);
1228 static void ieee80211_if_setup(struct net_device *dev)
1231 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1232 dev->netdev_ops = &ieee80211_dataif_ops;
1233 dev->destructor = ieee80211_if_free;
1236 static void ieee80211_if_setup_no_queue(struct net_device *dev)
1238 ieee80211_if_setup(dev);
1239 dev->priv_flags |= IFF_NO_QUEUE;
1242 static void ieee80211_iface_work(struct work_struct *work)
1244 struct ieee80211_sub_if_data *sdata =
1245 container_of(work, struct ieee80211_sub_if_data, work);
1246 struct ieee80211_local *local = sdata->local;
1247 struct sk_buff *skb;
1248 struct sta_info *sta;
1249 struct ieee80211_rx_agg *rx_agg;
1251 if (!ieee80211_sdata_running(sdata))
1254 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1257 if (!ieee80211_can_run_worker(local))
1260 /* first process frames */
1261 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1262 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1264 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_START) {
1265 rx_agg = (void *)&skb->cb;
1266 mutex_lock(&local->sta_mtx);
1267 sta = sta_info_get_bss(sdata, rx_agg->addr);
1269 __ieee80211_start_rx_ba_session(sta,
1270 0, 0, 0, 1, rx_agg->tid,
1271 IEEE80211_MAX_AMPDU_BUF,
1273 mutex_unlock(&local->sta_mtx);
1274 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_STOP) {
1275 rx_agg = (void *)&skb->cb;
1276 mutex_lock(&local->sta_mtx);
1277 sta = sta_info_get_bss(sdata, rx_agg->addr);
1279 __ieee80211_stop_rx_ba_session(sta,
1281 WLAN_BACK_RECIPIENT, 0,
1283 mutex_unlock(&local->sta_mtx);
1284 } else if (ieee80211_is_action(mgmt->frame_control) &&
1285 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1288 mutex_lock(&local->sta_mtx);
1289 sta = sta_info_get_bss(sdata, mgmt->sa);
1291 switch (mgmt->u.action.u.addba_req.action_code) {
1292 case WLAN_ACTION_ADDBA_REQ:
1293 ieee80211_process_addba_request(
1294 local, sta, mgmt, len);
1296 case WLAN_ACTION_ADDBA_RESP:
1297 ieee80211_process_addba_resp(local, sta,
1300 case WLAN_ACTION_DELBA:
1301 ieee80211_process_delba(sdata, sta,
1309 mutex_unlock(&local->sta_mtx);
1310 } else if (ieee80211_is_action(mgmt->frame_control) &&
1311 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1312 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1313 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1314 struct ieee80211_rx_status *status;
1315 enum nl80211_band band;
1318 status = IEEE80211_SKB_RXCB(skb);
1319 band = status->band;
1320 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1322 mutex_lock(&local->sta_mtx);
1323 sta = sta_info_get_bss(sdata, mgmt->sa);
1326 ieee80211_vht_handle_opmode(sdata, sta,
1330 mutex_unlock(&local->sta_mtx);
1333 case WLAN_VHT_ACTION_GROUPID_MGMT:
1334 ieee80211_process_mu_groups(sdata, mgmt);
1340 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1341 struct ieee80211_hdr *hdr = (void *)mgmt;
1343 * So the frame isn't mgmt, but frame_control
1344 * is at the right place anyway, of course, so
1345 * the if statement is correct.
1347 * Warn if we have other data frame types here,
1348 * they must not get here.
1350 WARN_ON(hdr->frame_control &
1351 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1352 WARN_ON(!(hdr->seq_ctrl &
1353 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1355 * This was a fragment of a frame, received while
1356 * a block-ack session was active. That cannot be
1357 * right, so terminate the session.
1359 mutex_lock(&local->sta_mtx);
1360 sta = sta_info_get_bss(sdata, mgmt->sa);
1362 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1363 IEEE80211_QOS_CTL_TID_MASK;
1365 __ieee80211_stop_rx_ba_session(
1366 sta, tid, WLAN_BACK_RECIPIENT,
1367 WLAN_REASON_QSTA_REQUIRE_SETUP,
1370 mutex_unlock(&local->sta_mtx);
1371 } else switch (sdata->vif.type) {
1372 case NL80211_IFTYPE_STATION:
1373 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1375 case NL80211_IFTYPE_ADHOC:
1376 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1378 case NL80211_IFTYPE_MESH_POINT:
1379 if (!ieee80211_vif_is_mesh(&sdata->vif))
1381 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1384 WARN(1, "frame for unexpected interface type");
1391 /* then other type-dependent work */
1392 switch (sdata->vif.type) {
1393 case NL80211_IFTYPE_STATION:
1394 ieee80211_sta_work(sdata);
1396 case NL80211_IFTYPE_ADHOC:
1397 ieee80211_ibss_work(sdata);
1399 case NL80211_IFTYPE_MESH_POINT:
1400 if (!ieee80211_vif_is_mesh(&sdata->vif))
1402 ieee80211_mesh_work(sdata);
1404 case NL80211_IFTYPE_OCB:
1405 ieee80211_ocb_work(sdata);
1412 static void ieee80211_recalc_smps_work(struct work_struct *work)
1414 struct ieee80211_sub_if_data *sdata =
1415 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1417 ieee80211_recalc_smps(sdata);
1421 * Helper function to initialise an interface to a specific type.
1423 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1424 enum nl80211_iftype type)
1426 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1429 /* clear type-dependent union */
1430 memset(&sdata->u, 0, sizeof(sdata->u));
1432 /* and set some type-dependent values */
1433 sdata->vif.type = type;
1434 sdata->vif.p2p = false;
1435 sdata->wdev.iftype = type;
1437 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1438 sdata->control_port_no_encrypt = false;
1439 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1440 sdata->vif.bss_conf.idle = true;
1442 sdata->noack_map = 0;
1444 /* only monitor/p2p-device differ */
1446 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1447 sdata->dev->type = ARPHRD_ETHER;
1450 skb_queue_head_init(&sdata->skb_queue);
1451 INIT_WORK(&sdata->work, ieee80211_iface_work);
1452 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1453 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
1454 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
1455 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
1458 case NL80211_IFTYPE_P2P_GO:
1459 type = NL80211_IFTYPE_AP;
1460 sdata->vif.type = type;
1461 sdata->vif.p2p = true;
1463 case NL80211_IFTYPE_AP:
1464 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1465 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1466 INIT_WORK(&sdata->u.ap.request_smps_work,
1467 ieee80211_request_smps_ap_work);
1468 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1469 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
1471 case NL80211_IFTYPE_P2P_CLIENT:
1472 type = NL80211_IFTYPE_STATION;
1473 sdata->vif.type = type;
1474 sdata->vif.p2p = true;
1476 case NL80211_IFTYPE_STATION:
1477 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1478 ieee80211_sta_setup_sdata(sdata);
1480 case NL80211_IFTYPE_OCB:
1481 sdata->vif.bss_conf.bssid = bssid_wildcard;
1482 ieee80211_ocb_setup_sdata(sdata);
1484 case NL80211_IFTYPE_ADHOC:
1485 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1486 ieee80211_ibss_setup_sdata(sdata);
1488 case NL80211_IFTYPE_MESH_POINT:
1489 if (ieee80211_vif_is_mesh(&sdata->vif))
1490 ieee80211_mesh_init_sdata(sdata);
1492 case NL80211_IFTYPE_MONITOR:
1493 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1494 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1495 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1496 MONITOR_FLAG_OTHER_BSS;
1498 case NL80211_IFTYPE_WDS:
1499 sdata->vif.bss_conf.bssid = NULL;
1501 case NL80211_IFTYPE_NAN:
1502 idr_init(&sdata->u.nan.function_inst_ids);
1503 spin_lock_init(&sdata->u.nan.func_lock);
1504 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1506 case NL80211_IFTYPE_AP_VLAN:
1507 case NL80211_IFTYPE_P2P_DEVICE:
1508 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1510 case NL80211_IFTYPE_UNSPECIFIED:
1511 case NUM_NL80211_IFTYPES:
1516 ieee80211_debugfs_add_netdev(sdata);
1519 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1520 enum nl80211_iftype type)
1522 struct ieee80211_local *local = sdata->local;
1524 enum nl80211_iftype internal_type = type;
1529 if (!local->ops->change_interface)
1532 switch (sdata->vif.type) {
1533 case NL80211_IFTYPE_AP:
1534 case NL80211_IFTYPE_STATION:
1535 case NL80211_IFTYPE_ADHOC:
1536 case NL80211_IFTYPE_OCB:
1538 * Could maybe also all others here?
1539 * Just not sure how that interacts
1540 * with the RX/config path e.g. for
1549 case NL80211_IFTYPE_AP:
1550 case NL80211_IFTYPE_STATION:
1551 case NL80211_IFTYPE_ADHOC:
1552 case NL80211_IFTYPE_OCB:
1554 * Could probably support everything
1555 * but WDS here (WDS do_open can fail
1556 * under memory pressure, which this
1557 * code isn't prepared to handle).
1560 case NL80211_IFTYPE_P2P_CLIENT:
1562 internal_type = NL80211_IFTYPE_STATION;
1564 case NL80211_IFTYPE_P2P_GO:
1566 internal_type = NL80211_IFTYPE_AP;
1572 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1576 ieee80211_stop_vif_queues(local, sdata,
1577 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1580 ieee80211_do_stop(sdata, false);
1582 ieee80211_teardown_sdata(sdata);
1584 ret = drv_change_interface(local, sdata, internal_type, p2p);
1586 type = ieee80211_vif_type_p2p(&sdata->vif);
1589 * Ignore return value here, there's not much we can do since
1590 * the driver changed the interface type internally already.
1591 * The warnings will hopefully make driver authors fix it :-)
1593 ieee80211_check_queues(sdata, type);
1595 ieee80211_setup_sdata(sdata, type);
1597 err = ieee80211_do_open(&sdata->wdev, false);
1598 WARN(err, "type change: do_open returned %d", err);
1600 ieee80211_wake_vif_queues(local, sdata,
1601 IEEE80211_QUEUE_STOP_REASON_IFTYPE_CHANGE);
1605 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1606 enum nl80211_iftype type)
1612 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1615 if (ieee80211_sdata_running(sdata)) {
1616 ret = ieee80211_runtime_change_iftype(sdata, type);
1620 /* Purge and reset type-dependent state. */
1621 ieee80211_teardown_sdata(sdata);
1622 ieee80211_setup_sdata(sdata, type);
1625 /* reset some values that shouldn't be kept across type changes */
1626 if (type == NL80211_IFTYPE_STATION)
1627 sdata->u.mgd.use_4addr = false;
1632 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1633 u8 *perm_addr, enum nl80211_iftype type)
1635 struct ieee80211_sub_if_data *sdata;
1636 u64 mask, start, addr, val, inc;
1638 u8 tmp_addr[ETH_ALEN];
1641 /* default ... something at least */
1642 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1644 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1645 local->hw.wiphy->n_addresses <= 1)
1648 mutex_lock(&local->iflist_mtx);
1651 case NL80211_IFTYPE_MONITOR:
1652 /* doesn't matter */
1654 case NL80211_IFTYPE_WDS:
1655 case NL80211_IFTYPE_AP_VLAN:
1656 /* match up with an AP interface */
1657 list_for_each_entry(sdata, &local->interfaces, list) {
1658 if (sdata->vif.type != NL80211_IFTYPE_AP)
1660 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1663 /* keep default if no AP interface present */
1665 case NL80211_IFTYPE_P2P_CLIENT:
1666 case NL80211_IFTYPE_P2P_GO:
1667 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
1668 list_for_each_entry(sdata, &local->interfaces, list) {
1669 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1671 if (!ieee80211_sdata_running(sdata))
1673 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1677 /* otherwise fall through */
1679 /* assign a new address if possible -- try n_addresses first */
1680 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1683 list_for_each_entry(sdata, &local->interfaces, list) {
1684 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1693 local->hw.wiphy->addresses[i].addr,
1699 /* try mask if available */
1700 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1703 m = local->hw.wiphy->addr_mask;
1704 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1705 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1706 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1708 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1709 /* not a contiguous mask ... not handled now! */
1710 pr_info("not contiguous\n");
1715 * Pick address of existing interface in case user changed
1716 * MAC address manually, default to perm_addr.
1718 m = local->hw.wiphy->perm_addr;
1719 list_for_each_entry(sdata, &local->interfaces, list) {
1720 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1722 m = sdata->vif.addr;
1725 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1726 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1727 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1729 inc = 1ULL<<__ffs64(mask);
1730 val = (start & mask);
1731 addr = (start & ~mask) | (val & mask);
1735 tmp_addr[5] = addr >> 0*8;
1736 tmp_addr[4] = addr >> 1*8;
1737 tmp_addr[3] = addr >> 2*8;
1738 tmp_addr[2] = addr >> 3*8;
1739 tmp_addr[1] = addr >> 4*8;
1740 tmp_addr[0] = addr >> 5*8;
1744 list_for_each_entry(sdata, &local->interfaces, list) {
1745 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
1752 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1755 addr = (start & ~mask) | (val & mask);
1756 } while (addr != start);
1762 mutex_unlock(&local->iflist_mtx);
1765 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1766 unsigned char name_assign_type,
1767 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1768 struct vif_params *params)
1770 struct net_device *ndev = NULL;
1771 struct ieee80211_sub_if_data *sdata = NULL;
1772 struct txq_info *txqi;
1773 void (*if_setup)(struct net_device *dev);
1779 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
1780 struct wireless_dev *wdev;
1782 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1786 wdev = &sdata->wdev;
1789 strlcpy(sdata->name, name, IFNAMSIZ);
1790 ieee80211_assign_perm_addr(local, wdev->address, type);
1791 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1793 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1797 if (local->ops->wake_tx_queue)
1798 txq_size += sizeof(struct txq_info) +
1799 local->hw.txq_data_size;
1801 if (local->ops->wake_tx_queue)
1802 if_setup = ieee80211_if_setup_no_queue;
1804 if_setup = ieee80211_if_setup;
1806 if (local->hw.queues >= IEEE80211_NUM_ACS)
1807 txqs = IEEE80211_NUM_ACS;
1809 ndev = alloc_netdev_mqs(size + txq_size,
1810 name, name_assign_type,
1814 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1816 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1817 if (!ndev->tstats) {
1822 ndev->needed_headroom = local->tx_headroom +
1823 4*6 /* four MAC addresses */
1824 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1826 + 8 /* rfc1042/bridge tunnel */
1827 - ETH_HLEN /* ethernet hard_header_len */
1828 + IEEE80211_ENCRYPT_HEADROOM;
1829 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1831 ret = dev_alloc_name(ndev, ndev->name);
1833 ieee80211_if_free(ndev);
1837 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1838 if (params && is_valid_ether_addr(params->macaddr))
1839 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1841 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1842 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1844 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1845 sdata = netdev_priv(ndev);
1846 ndev->ieee80211_ptr = &sdata->wdev;
1847 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1848 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1851 txqi = netdev_priv(ndev) + size;
1852 ieee80211_txq_init(sdata, NULL, txqi, 0);
1858 /* initialise type-independent data */
1859 sdata->wdev.wiphy = local->hw.wiphy;
1860 sdata->local = local;
1862 ieee80211_init_frag_cache(&sdata->frags);
1864 INIT_LIST_HEAD(&sdata->key_list);
1866 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1867 ieee80211_dfs_cac_timer_work);
1868 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1869 ieee80211_delayed_tailroom_dec);
1871 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1872 struct ieee80211_supported_band *sband;
1873 sband = local->hw.wiphy->bands[i];
1874 sdata->rc_rateidx_mask[i] =
1875 sband ? (1 << sband->n_bitrates) - 1 : 0;
1880 memcpy(sdata->rc_rateidx_mcs_mask[i],
1881 sband->ht_cap.mcs.rx_mask,
1882 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1884 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1885 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1886 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1888 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1889 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1890 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1891 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1895 ieee80211_set_default_queues(sdata);
1897 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1898 sdata->user_power_level = local->user_power_level;
1900 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1902 /* setup type-dependent data */
1903 ieee80211_setup_sdata(sdata, type);
1907 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1908 if (type == NL80211_IFTYPE_STATION)
1909 sdata->u.mgd.use_4addr = params->use_4addr;
1912 ndev->features |= local->hw.netdev_features;
1914 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1916 ret = register_netdevice(ndev);
1918 ieee80211_if_free(ndev);
1923 mutex_lock(&local->iflist_mtx);
1924 list_add_tail_rcu(&sdata->list, &local->interfaces);
1925 mutex_unlock(&local->iflist_mtx);
1928 *new_wdev = &sdata->wdev;
1933 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1937 mutex_lock(&sdata->local->iflist_mtx);
1938 list_del_rcu(&sdata->list);
1939 mutex_unlock(&sdata->local->iflist_mtx);
1942 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
1947 unregister_netdevice(sdata->dev);
1949 cfg80211_unregister_wdev(&sdata->wdev);
1950 ieee80211_teardown_sdata(sdata);
1955 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1957 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1959 ieee80211_do_stop(sdata, true);
1962 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1964 struct ieee80211_sub_if_data *sdata, *tmp;
1965 LIST_HEAD(unreg_list);
1966 LIST_HEAD(wdev_list);
1970 /* Before destroying the interfaces, make sure they're all stopped so
1971 * that the hardware is stopped. Otherwise, the driver might still be
1972 * iterating the interfaces during the shutdown, e.g. from a worker
1973 * or from RX processing or similar, and if it does so (using atomic
1974 * iteration) while we're manipulating the list, the iteration will
1977 * After this, the hardware should be stopped and the driver should
1978 * have stopped all of its activities, so that we can do RCU-unaware
1979 * manipulations of the interface list below.
1981 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1983 WARN(local->open_count, "%s: open count remains %d\n",
1984 wiphy_name(local->hw.wiphy), local->open_count);
1986 mutex_lock(&local->iflist_mtx);
1987 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1988 list_del(&sdata->list);
1991 unregister_netdevice_queue(sdata->dev, &unreg_list);
1993 list_add(&sdata->list, &wdev_list);
1995 mutex_unlock(&local->iflist_mtx);
1996 unregister_netdevice_many(&unreg_list);
1998 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1999 list_del(&sdata->list);
2000 cfg80211_unregister_wdev(&sdata->wdev);
2005 static int netdev_notify(struct notifier_block *nb,
2006 unsigned long state, void *ptr)
2008 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2009 struct ieee80211_sub_if_data *sdata;
2011 if (state != NETDEV_CHANGENAME)
2014 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
2017 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
2020 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2021 memcpy(sdata->name, dev->name, IFNAMSIZ);
2022 ieee80211_debugfs_rename_netdev(sdata);
2027 static struct notifier_block mac80211_netdev_notifier = {
2028 .notifier_call = netdev_notify,
2031 int ieee80211_iface_init(void)
2033 return register_netdevice_notifier(&mac80211_netdev_notifier);
2036 void ieee80211_iface_exit(void)
2038 unregister_netdevice_notifier(&mac80211_netdev_notifier);