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
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
14 #include <linux/slab.h>
15 #include <linux/kernel.h>
16 #include <linux/if_arp.h>
17 #include <linux/netdevice.h>
18 #include <linux/rtnetlink.h>
19 #include <net/mac80211.h>
20 #include <net/ieee80211_radiotap.h>
21 #include "ieee80211_i.h"
23 #include "debugfs_netdev.h"
26 #include "driver-ops.h"
31 * DOC: Interface list locking
33 * The interface list in each struct ieee80211_local is protected
36 * (1) modifications may only be done under the RTNL
37 * (2) modifications and readers are protected against each other by
39 * (3) modifications are done in an RCU manner so atomic readers
40 * can traverse the list in RCU-safe blocks.
42 * As a consequence, reads (traversals) of the list can be protected
43 * by either the RTNL, the iflist_mtx or RCU.
46 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
48 struct ieee80211_chanctx_conf *chanctx_conf;
52 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
58 power = ieee80211_chandef_max_power(&chanctx_conf->def);
61 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
62 power = min(power, sdata->user_power_level);
64 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
65 power = min(power, sdata->ap_power_level);
67 if (power != sdata->vif.bss_conf.txpower) {
68 sdata->vif.bss_conf.txpower = power;
69 ieee80211_hw_config(sdata->local, 0);
76 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
79 if (__ieee80211_recalc_txpower(sdata) ||
80 (update_bss && ieee80211_sdata_running(sdata)))
81 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
84 static u32 __ieee80211_idle_off(struct ieee80211_local *local)
86 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
89 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
90 return IEEE80211_CONF_CHANGE_IDLE;
93 static u32 __ieee80211_idle_on(struct ieee80211_local *local)
95 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
98 ieee80211_flush_queues(local, NULL, false);
100 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
101 return IEEE80211_CONF_CHANGE_IDLE;
104 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
107 bool working, scanning, active;
108 unsigned int led_trig_start = 0, led_trig_stop = 0;
110 lockdep_assert_held(&local->mtx);
112 active = force_active ||
113 !list_empty(&local->chanctx_list) ||
116 working = !local->ops->remain_on_channel &&
117 !list_empty(&local->roc_list);
119 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
120 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
122 if (working || scanning)
123 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
125 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
128 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
130 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
132 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
134 if (working || scanning || active)
135 return __ieee80211_idle_off(local);
136 return __ieee80211_idle_on(local);
139 u32 ieee80211_idle_off(struct ieee80211_local *local)
141 return __ieee80211_recalc_idle(local, true);
144 void ieee80211_recalc_idle(struct ieee80211_local *local)
146 u32 change = __ieee80211_recalc_idle(local, false);
148 ieee80211_hw_config(local, change);
151 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
153 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
160 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
163 struct ieee80211_local *local = sdata->local;
164 struct ieee80211_sub_if_data *iter;
169 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
173 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
174 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
175 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
177 m = local->hw.wiphy->addr_mask;
178 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
179 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
180 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
185 mutex_lock(&local->iflist_mtx);
186 list_for_each_entry(iter, &local->interfaces, list) {
190 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
191 !(iter->u.mntr_flags & MONITOR_FLAG_ACTIVE))
195 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
196 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
197 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
199 if ((new & ~mask) != (tmp & ~mask)) {
204 mutex_unlock(&local->iflist_mtx);
209 static int ieee80211_change_mac(struct net_device *dev, void *addr)
211 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
212 struct sockaddr *sa = addr;
213 bool check_dup = true;
216 if (ieee80211_sdata_running(sdata))
219 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
220 !(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
223 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
227 ret = eth_mac_addr(dev, sa);
230 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
235 static inline int identical_mac_addr_allowed(int type1, int type2)
237 return type1 == NL80211_IFTYPE_MONITOR ||
238 type2 == NL80211_IFTYPE_MONITOR ||
239 type1 == NL80211_IFTYPE_P2P_DEVICE ||
240 type2 == NL80211_IFTYPE_P2P_DEVICE ||
241 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
242 (type1 == NL80211_IFTYPE_WDS &&
243 (type2 == NL80211_IFTYPE_WDS ||
244 type2 == NL80211_IFTYPE_AP)) ||
245 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
246 (type1 == NL80211_IFTYPE_AP_VLAN &&
247 (type2 == NL80211_IFTYPE_AP ||
248 type2 == NL80211_IFTYPE_AP_VLAN));
251 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
252 enum nl80211_iftype iftype)
254 struct ieee80211_local *local = sdata->local;
255 struct ieee80211_sub_if_data *nsdata;
260 /* we hold the RTNL here so can safely walk the list */
261 list_for_each_entry(nsdata, &local->interfaces, list) {
262 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
264 * Only OCB and monitor mode may coexist
266 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
267 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
268 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
269 nsdata->vif.type == NL80211_IFTYPE_OCB))
273 * Allow only a single IBSS interface to be up at any
274 * time. This is restricted because beacon distribution
275 * cannot work properly if both are in the same IBSS.
277 * To remove this restriction we'd have to disallow them
278 * from setting the same SSID on different IBSS interfaces
279 * belonging to the same hardware. Then, however, we're
280 * faced with having to adopt two different TSF timers...
282 if (iftype == NL80211_IFTYPE_ADHOC &&
283 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
286 * will not add another interface while any channel
289 if (nsdata->vif.csa_active)
293 * The remaining checks are only performed for interfaces
294 * with the same MAC address.
296 if (!ether_addr_equal(sdata->vif.addr,
301 * check whether it may have the same address
303 if (!identical_mac_addr_allowed(iftype,
308 * can only add VLANs to enabled APs
310 if (iftype == NL80211_IFTYPE_AP_VLAN &&
311 nsdata->vif.type == NL80211_IFTYPE_AP)
312 sdata->bss = &nsdata->u.ap;
316 mutex_lock(&local->chanctx_mtx);
317 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
318 mutex_unlock(&local->chanctx_mtx);
322 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
323 enum nl80211_iftype iftype)
325 int n_queues = sdata->local->hw.queues;
328 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
329 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
330 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
331 IEEE80211_INVAL_HW_QUEUE))
333 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
339 if ((iftype != NL80211_IFTYPE_AP &&
340 iftype != NL80211_IFTYPE_P2P_GO &&
341 iftype != NL80211_IFTYPE_MESH_POINT) ||
342 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
343 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
347 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
350 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
356 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
359 struct ieee80211_local *local = sdata->local;
360 u32 flags = sdata->u.mntr_flags;
362 #define ADJUST(_f, _s) do { \
363 if (flags & MONITOR_FLAG_##_f) \
364 local->fif_##_s += offset; \
367 ADJUST(FCSFAIL, fcsfail);
368 ADJUST(PLCPFAIL, plcpfail);
369 ADJUST(CONTROL, control);
370 ADJUST(CONTROL, pspoll);
371 ADJUST(OTHER_BSS, other_bss);
376 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
378 struct ieee80211_local *local = sdata->local;
381 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
382 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
383 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
384 else if (local->hw.queues >= IEEE80211_NUM_ACS)
385 sdata->vif.hw_queue[i] = i;
387 sdata->vif.hw_queue[i] = 0;
389 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
392 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
394 struct ieee80211_sub_if_data *sdata;
397 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
402 if (local->monitor_sdata)
405 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
410 sdata->local = local;
411 sdata->vif.type = NL80211_IFTYPE_MONITOR;
412 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
413 wiphy_name(local->hw.wiphy));
414 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
416 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
418 ieee80211_set_default_queues(sdata);
420 ret = drv_add_interface(local, sdata);
422 /* ok .. stupid driver, it asked for this! */
427 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
433 mutex_lock(&local->iflist_mtx);
434 rcu_assign_pointer(local->monitor_sdata, sdata);
435 mutex_unlock(&local->iflist_mtx);
437 mutex_lock(&local->mtx);
438 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
439 IEEE80211_CHANCTX_EXCLUSIVE);
440 mutex_unlock(&local->mtx);
442 mutex_lock(&local->iflist_mtx);
443 RCU_INIT_POINTER(local->monitor_sdata, NULL);
444 mutex_unlock(&local->iflist_mtx);
446 drv_remove_interface(local, sdata);
454 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
456 struct ieee80211_sub_if_data *sdata;
458 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
463 mutex_lock(&local->iflist_mtx);
465 sdata = rcu_dereference_protected(local->monitor_sdata,
466 lockdep_is_held(&local->iflist_mtx));
468 mutex_unlock(&local->iflist_mtx);
472 RCU_INIT_POINTER(local->monitor_sdata, NULL);
473 mutex_unlock(&local->iflist_mtx);
477 mutex_lock(&local->mtx);
478 ieee80211_vif_release_channel(sdata);
479 mutex_unlock(&local->mtx);
481 drv_remove_interface(local, sdata);
487 * NOTE: Be very careful when changing this function, it must NOT return
488 * an error on interface type changes that have been pre-checked, so most
489 * checks should be in ieee80211_check_concurrent_iface.
491 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
493 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
494 struct net_device *dev = wdev->netdev;
495 struct ieee80211_local *local = sdata->local;
496 struct sta_info *sta;
499 u32 hw_reconf_flags = 0;
501 switch (sdata->vif.type) {
502 case NL80211_IFTYPE_WDS:
503 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
506 case NL80211_IFTYPE_AP_VLAN: {
507 struct ieee80211_sub_if_data *master;
512 mutex_lock(&local->mtx);
513 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
514 mutex_unlock(&local->mtx);
516 master = container_of(sdata->bss,
517 struct ieee80211_sub_if_data, u.ap);
518 sdata->control_port_protocol =
519 master->control_port_protocol;
520 sdata->control_port_no_encrypt =
521 master->control_port_no_encrypt;
522 sdata->vif.cab_queue = master->vif.cab_queue;
523 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
524 sizeof(sdata->vif.hw_queue));
525 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
527 mutex_lock(&local->key_mtx);
528 sdata->crypto_tx_tailroom_needed_cnt +=
529 master->crypto_tx_tailroom_needed_cnt;
530 mutex_unlock(&local->key_mtx);
534 case NL80211_IFTYPE_AP:
535 sdata->bss = &sdata->u.ap;
537 case NL80211_IFTYPE_MESH_POINT:
538 case NL80211_IFTYPE_STATION:
539 case NL80211_IFTYPE_MONITOR:
540 case NL80211_IFTYPE_ADHOC:
541 case NL80211_IFTYPE_P2P_DEVICE:
542 case NL80211_IFTYPE_OCB:
543 /* no special treatment */
545 case NL80211_IFTYPE_UNSPECIFIED:
546 case NUM_NL80211_IFTYPES:
547 case NL80211_IFTYPE_P2P_CLIENT:
548 case NL80211_IFTYPE_P2P_GO:
554 if (local->open_count == 0) {
555 res = drv_start(local);
558 /* we're brought up, everything changes */
559 hw_reconf_flags = ~0;
560 ieee80211_led_radio(local, true);
561 ieee80211_mod_tpt_led_trig(local,
562 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
566 * Copy the hopefully now-present MAC address to
567 * this interface, if it has the special null one.
569 if (dev && is_zero_ether_addr(dev->dev_addr)) {
570 memcpy(dev->dev_addr,
571 local->hw.wiphy->perm_addr,
573 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
575 if (!is_valid_ether_addr(dev->dev_addr)) {
576 res = -EADDRNOTAVAIL;
581 switch (sdata->vif.type) {
582 case NL80211_IFTYPE_AP_VLAN:
583 /* no need to tell driver, but set carrier and chanctx */
584 if (rtnl_dereference(sdata->bss->beacon)) {
585 ieee80211_vif_vlan_copy_chanctx(sdata);
586 netif_carrier_on(dev);
588 netif_carrier_off(dev);
591 case NL80211_IFTYPE_MONITOR:
592 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
593 local->cooked_mntrs++;
597 if (sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE) {
598 res = drv_add_interface(local, sdata);
601 } else if (local->monitors == 0 && local->open_count == 0) {
602 res = ieee80211_add_virtual_monitor(local);
607 /* must be before the call to ieee80211_configure_filter */
609 if (local->monitors == 1) {
610 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
611 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
614 ieee80211_adjust_monitor_flags(sdata, 1);
615 ieee80211_configure_filter(local);
616 mutex_lock(&local->mtx);
617 ieee80211_recalc_idle(local);
618 mutex_unlock(&local->mtx);
620 netif_carrier_on(dev);
624 ieee80211_del_virtual_monitor(local);
626 res = drv_add_interface(local, sdata);
629 res = ieee80211_check_queues(sdata,
630 ieee80211_vif_type_p2p(&sdata->vif));
632 goto err_del_interface;
635 if (sdata->vif.type == NL80211_IFTYPE_AP) {
637 local->fif_probe_req++;
639 ieee80211_configure_filter(local);
640 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
641 local->fif_probe_req++;
644 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
645 changed |= ieee80211_reset_erp_info(sdata);
646 ieee80211_bss_info_change_notify(sdata, changed);
648 switch (sdata->vif.type) {
649 case NL80211_IFTYPE_STATION:
650 case NL80211_IFTYPE_ADHOC:
651 case NL80211_IFTYPE_AP:
652 case NL80211_IFTYPE_MESH_POINT:
653 case NL80211_IFTYPE_OCB:
654 netif_carrier_off(dev);
656 case NL80211_IFTYPE_WDS:
657 case NL80211_IFTYPE_P2P_DEVICE:
665 * Set default queue parameters so drivers don't
666 * need to initialise the hardware if the hardware
667 * doesn't start up with sane defaults.
668 * Enable QoS for anything but station interfaces.
670 ieee80211_set_wmm_default(sdata, true,
671 sdata->vif.type != NL80211_IFTYPE_STATION);
674 set_bit(SDATA_STATE_RUNNING, &sdata->state);
676 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
677 /* Create STA entry for the WDS peer */
678 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
682 goto err_del_interface;
685 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
686 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
687 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
689 res = sta_info_insert(sta);
691 /* STA has been freed */
692 goto err_del_interface;
695 rate_control_rate_init(sta);
696 netif_carrier_on(dev);
697 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
698 rcu_assign_pointer(local->p2p_sdata, sdata);
702 * set_multicast_list will be invoked by the networking core
703 * which will check whether any increments here were done in
704 * error and sync them down to the hardware as filter flags.
706 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
707 atomic_inc(&local->iff_allmultis);
713 ieee80211_hw_config(local, hw_reconf_flags);
715 ieee80211_recalc_ps(local);
717 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
718 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
719 /* XXX: for AP_VLAN, actually track AP queues */
720 netif_tx_start_all_queues(dev);
723 int n_acs = IEEE80211_NUM_ACS;
726 if (local->hw.queues < IEEE80211_NUM_ACS)
729 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
730 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
731 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
732 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
733 for (ac = 0; ac < n_acs; ac++) {
734 int ac_queue = sdata->vif.hw_queue[ac];
736 if (local->queue_stop_reasons[ac_queue] == 0 &&
737 skb_queue_empty(&local->pending[ac_queue]))
738 netif_start_subqueue(dev, ac);
741 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
746 drv_remove_interface(local, sdata);
748 if (!local->open_count)
752 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
753 mutex_lock(&local->mtx);
754 list_del(&sdata->u.vlan.list);
755 mutex_unlock(&local->mtx);
757 /* might already be clear but that doesn't matter */
758 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
762 static int ieee80211_open(struct net_device *dev)
764 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
767 /* fail early if user set an invalid address */
768 if (!is_valid_ether_addr(dev->dev_addr))
769 return -EADDRNOTAVAIL;
771 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
775 return ieee80211_do_open(&sdata->wdev, true);
778 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
781 struct ieee80211_local *local = sdata->local;
782 struct fq *fq = &local->fq;
784 struct sk_buff *skb, *tmp;
785 u32 hw_reconf_flags = 0;
788 struct cfg80211_chan_def chandef;
791 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
793 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
795 ieee80211_scan_cancel(local);
798 * Stop TX on this interface first.
801 netif_tx_stop_all_queues(sdata->dev);
803 ieee80211_roc_purge(local, sdata);
805 switch (sdata->vif.type) {
806 case NL80211_IFTYPE_STATION:
807 ieee80211_mgd_stop(sdata);
809 case NL80211_IFTYPE_ADHOC:
810 ieee80211_ibss_stop(sdata);
812 case NL80211_IFTYPE_AP:
813 cancel_work_sync(&sdata->u.ap.request_smps_work);
820 * Remove all stations associated with this interface.
822 * This must be done before calling ops->remove_interface()
823 * because otherwise we can later invoke ops->sta_notify()
824 * whenever the STAs are removed, and that invalidates driver
825 * assumptions about always getting a vif pointer that is valid
826 * (because if we remove a STA after ops->remove_interface()
827 * the driver will have removed the vif info already!)
829 * In WDS mode a station must exist here and be flushed, for
830 * AP_VLANs stations may exist since there's nothing else that
831 * would have removed them, but in other modes there shouldn't
834 flushed = sta_info_flush(sdata);
835 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
836 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
837 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
839 /* don't count this interface for allmulti while it is down */
840 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
841 atomic_dec(&local->iff_allmultis);
843 if (sdata->vif.type == NL80211_IFTYPE_AP) {
845 local->fif_probe_req--;
846 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
847 local->fif_probe_req--;
851 netif_addr_lock_bh(sdata->dev);
852 spin_lock_bh(&local->filter_lock);
853 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
854 sdata->dev->addr_len);
855 spin_unlock_bh(&local->filter_lock);
856 netif_addr_unlock_bh(sdata->dev);
859 del_timer_sync(&local->dynamic_ps_timer);
860 cancel_work_sync(&local->dynamic_ps_enable_work);
862 cancel_work_sync(&sdata->recalc_smps);
864 mutex_lock(&local->mtx);
865 sdata->vif.csa_active = false;
866 if (sdata->vif.type == NL80211_IFTYPE_STATION)
867 sdata->u.mgd.csa_waiting_bcn = false;
868 if (sdata->csa_block_tx) {
869 ieee80211_wake_vif_queues(local, sdata,
870 IEEE80211_QUEUE_STOP_REASON_CSA);
871 sdata->csa_block_tx = false;
873 mutex_unlock(&local->mtx);
876 cancel_work_sync(&sdata->csa_finalize_work);
878 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
880 if (sdata->wdev.cac_started) {
881 chandef = sdata->vif.bss_conf.chandef;
882 WARN_ON(local->suspended);
883 mutex_lock(&local->mtx);
884 ieee80211_vif_release_channel(sdata);
885 mutex_unlock(&local->mtx);
886 cfg80211_cac_event(sdata->dev, &chandef,
887 NL80211_RADAR_CAC_ABORTED,
891 /* APs need special treatment */
892 if (sdata->vif.type == NL80211_IFTYPE_AP) {
893 struct ieee80211_sub_if_data *vlan, *tmpsdata;
895 /* down all dependent devices, that is VLANs */
896 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
898 dev_close(vlan->dev);
899 WARN_ON(!list_empty(&sdata->u.ap.vlans));
900 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
901 /* remove all packets in parent bc_buf pointing to this dev */
902 ps = &sdata->bss->ps;
904 spin_lock_irqsave(&ps->bc_buf.lock, flags);
905 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
906 if (skb->dev == sdata->dev) {
907 __skb_unlink(skb, &ps->bc_buf);
908 local->total_ps_buffered--;
909 ieee80211_free_txskb(&local->hw, skb);
912 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
918 switch (sdata->vif.type) {
919 case NL80211_IFTYPE_AP_VLAN:
920 mutex_lock(&local->mtx);
921 list_del(&sdata->u.vlan.list);
922 mutex_unlock(&local->mtx);
923 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
924 /* see comment in the default case below */
925 ieee80211_free_keys(sdata, true);
926 /* no need to tell driver */
928 case NL80211_IFTYPE_MONITOR:
929 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
930 local->cooked_mntrs--;
935 if (local->monitors == 0) {
936 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
937 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
940 ieee80211_adjust_monitor_flags(sdata, -1);
942 case NL80211_IFTYPE_P2P_DEVICE:
943 /* relies on synchronize_rcu() below */
944 RCU_INIT_POINTER(local->p2p_sdata, NULL);
947 cancel_work_sync(&sdata->work);
949 * When we get here, the interface is marked down.
950 * Free the remaining keys, if there are any
951 * (which can happen in AP mode if userspace sets
952 * keys before the interface is operating, and maybe
955 * Force the key freeing to always synchronize_net()
956 * to wait for the RX path in case it is using this
957 * interface enqueuing frames at this very time on
960 ieee80211_free_keys(sdata, true);
961 skb_queue_purge(&sdata->skb_queue);
966 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
967 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
968 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
969 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
970 if (info->control.vif == &sdata->vif) {
971 __skb_unlink(skb, &local->pending[i]);
972 ieee80211_free_txskb(&local->hw, skb);
976 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
978 if (sdata->vif.txq) {
979 struct txq_info *txqi = to_txq_info(sdata->vif.txq);
981 spin_lock_bh(&fq->lock);
982 ieee80211_txq_purge(local, txqi);
983 spin_unlock_bh(&fq->lock);
986 if (local->open_count == 0)
987 ieee80211_clear_tx_pending(local);
990 * If the interface goes down while suspended, presumably because
991 * the device was unplugged and that happens before our resume,
992 * then the driver is already unconfigured and the remainder of
993 * this function isn't needed.
994 * XXX: what about WoWLAN? If the device has software state, e.g.
995 * memory allocated, it might expect teardown commands from
998 if (local->suspended) {
999 WARN_ON(local->wowlan);
1000 WARN_ON(rtnl_dereference(local->monitor_sdata));
1004 switch (sdata->vif.type) {
1005 case NL80211_IFTYPE_AP_VLAN:
1007 case NL80211_IFTYPE_MONITOR:
1008 if (local->monitors == 0)
1009 ieee80211_del_virtual_monitor(local);
1011 mutex_lock(&local->mtx);
1012 ieee80211_recalc_idle(local);
1013 mutex_unlock(&local->mtx);
1015 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
1021 drv_remove_interface(local, sdata);
1024 ieee80211_recalc_ps(local);
1027 flush_delayed_work(&local->scan_work);
1029 if (local->open_count == 0) {
1030 ieee80211_stop_device(local);
1032 /* no reconfiguring after stop! */
1036 /* do after stop to avoid reconfiguring when we stop anyway */
1037 ieee80211_configure_filter(local);
1038 ieee80211_hw_config(local, hw_reconf_flags);
1040 if (local->monitors == local->open_count)
1041 ieee80211_add_virtual_monitor(local);
1044 static int ieee80211_stop(struct net_device *dev)
1046 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1048 ieee80211_do_stop(sdata, true);
1053 static void ieee80211_set_multicast_list(struct net_device *dev)
1055 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1056 struct ieee80211_local *local = sdata->local;
1057 int allmulti, sdata_allmulti;
1059 allmulti = !!(dev->flags & IFF_ALLMULTI);
1060 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
1062 if (allmulti != sdata_allmulti) {
1063 if (dev->flags & IFF_ALLMULTI)
1064 atomic_inc(&local->iff_allmultis);
1066 atomic_dec(&local->iff_allmultis);
1067 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1070 spin_lock_bh(&local->filter_lock);
1071 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
1072 spin_unlock_bh(&local->filter_lock);
1073 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
1077 * Called when the netdev is removed or, by the code below, before
1078 * the interface type changes.
1080 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1084 /* free extra data */
1085 ieee80211_free_keys(sdata, false);
1087 ieee80211_debugfs_remove_netdev(sdata);
1089 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1090 __skb_queue_purge(&sdata->fragments[i].skb_list);
1091 sdata->fragment_next = 0;
1093 if (ieee80211_vif_is_mesh(&sdata->vif))
1094 ieee80211_mesh_teardown_sdata(sdata);
1097 static void ieee80211_uninit(struct net_device *dev)
1099 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1102 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
1103 struct sk_buff *skb,
1105 select_queue_fallback_t fallback)
1107 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1110 static struct rtnl_link_stats64 *
1111 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1115 for_each_possible_cpu(i) {
1116 const struct pcpu_sw_netstats *tstats;
1117 u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
1120 tstats = per_cpu_ptr(dev->tstats, i);
1123 start = u64_stats_fetch_begin_irq(&tstats->syncp);
1124 rx_packets = tstats->rx_packets;
1125 tx_packets = tstats->tx_packets;
1126 rx_bytes = tstats->rx_bytes;
1127 tx_bytes = tstats->tx_bytes;
1128 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
1130 stats->rx_packets += rx_packets;
1131 stats->tx_packets += tx_packets;
1132 stats->rx_bytes += rx_bytes;
1133 stats->tx_bytes += tx_bytes;
1139 static const struct net_device_ops ieee80211_dataif_ops = {
1140 .ndo_open = ieee80211_open,
1141 .ndo_stop = ieee80211_stop,
1142 .ndo_uninit = ieee80211_uninit,
1143 .ndo_start_xmit = ieee80211_subif_start_xmit,
1144 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1145 .ndo_change_mtu = ieee80211_change_mtu,
1146 .ndo_set_mac_address = ieee80211_change_mac,
1147 .ndo_select_queue = ieee80211_netdev_select_queue,
1148 .ndo_get_stats64 = ieee80211_get_stats64,
1151 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
1152 struct sk_buff *skb,
1154 select_queue_fallback_t fallback)
1156 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1157 struct ieee80211_local *local = sdata->local;
1158 struct ieee80211_hdr *hdr;
1159 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1161 if (local->hw.queues < IEEE80211_NUM_ACS)
1165 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
1166 return 0; /* doesn't matter, frame will be dropped */
1168 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
1170 return ieee80211_select_queue_80211(sdata, skb, hdr);
1173 static const struct net_device_ops ieee80211_monitorif_ops = {
1174 .ndo_open = ieee80211_open,
1175 .ndo_stop = ieee80211_stop,
1176 .ndo_uninit = ieee80211_uninit,
1177 .ndo_start_xmit = ieee80211_monitor_start_xmit,
1178 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1179 .ndo_change_mtu = ieee80211_change_mtu,
1180 .ndo_set_mac_address = ieee80211_change_mac,
1181 .ndo_select_queue = ieee80211_monitor_select_queue,
1182 .ndo_get_stats64 = ieee80211_get_stats64,
1185 static void ieee80211_if_free(struct net_device *dev)
1187 free_percpu(dev->tstats);
1191 static void ieee80211_if_setup(struct net_device *dev)
1194 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1195 dev->netdev_ops = &ieee80211_dataif_ops;
1196 dev->destructor = ieee80211_if_free;
1199 static void ieee80211_if_setup_no_queue(struct net_device *dev)
1201 ieee80211_if_setup(dev);
1202 dev->priv_flags |= IFF_NO_QUEUE;
1205 static void ieee80211_iface_work(struct work_struct *work)
1207 struct ieee80211_sub_if_data *sdata =
1208 container_of(work, struct ieee80211_sub_if_data, work);
1209 struct ieee80211_local *local = sdata->local;
1210 struct sk_buff *skb;
1211 struct sta_info *sta;
1212 struct ieee80211_ra_tid *ra_tid;
1213 struct ieee80211_rx_agg *rx_agg;
1215 if (!ieee80211_sdata_running(sdata))
1218 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1221 if (!ieee80211_can_run_worker(local))
1224 /* first process frames */
1225 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1226 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1228 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1229 ra_tid = (void *)&skb->cb;
1230 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1232 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1233 ra_tid = (void *)&skb->cb;
1234 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1236 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_START) {
1237 rx_agg = (void *)&skb->cb;
1238 mutex_lock(&local->sta_mtx);
1239 sta = sta_info_get_bss(sdata, rx_agg->addr);
1241 __ieee80211_start_rx_ba_session(sta,
1242 0, 0, 0, 1, rx_agg->tid,
1243 IEEE80211_MAX_AMPDU_BUF,
1245 mutex_unlock(&local->sta_mtx);
1246 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_STOP) {
1247 rx_agg = (void *)&skb->cb;
1248 mutex_lock(&local->sta_mtx);
1249 sta = sta_info_get_bss(sdata, rx_agg->addr);
1251 __ieee80211_stop_rx_ba_session(sta,
1253 WLAN_BACK_RECIPIENT, 0,
1255 mutex_unlock(&local->sta_mtx);
1256 } else if (ieee80211_is_action(mgmt->frame_control) &&
1257 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1260 mutex_lock(&local->sta_mtx);
1261 sta = sta_info_get_bss(sdata, mgmt->sa);
1263 switch (mgmt->u.action.u.addba_req.action_code) {
1264 case WLAN_ACTION_ADDBA_REQ:
1265 ieee80211_process_addba_request(
1266 local, sta, mgmt, len);
1268 case WLAN_ACTION_ADDBA_RESP:
1269 ieee80211_process_addba_resp(local, sta,
1272 case WLAN_ACTION_DELBA:
1273 ieee80211_process_delba(sdata, sta,
1281 mutex_unlock(&local->sta_mtx);
1282 } else if (ieee80211_is_action(mgmt->frame_control) &&
1283 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1284 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1285 case WLAN_VHT_ACTION_GROUPID_MGMT:
1286 ieee80211_process_mu_groups(sdata, mgmt);
1292 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1293 struct ieee80211_hdr *hdr = (void *)mgmt;
1295 * So the frame isn't mgmt, but frame_control
1296 * is at the right place anyway, of course, so
1297 * the if statement is correct.
1299 * Warn if we have other data frame types here,
1300 * they must not get here.
1302 WARN_ON(hdr->frame_control &
1303 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1304 WARN_ON(!(hdr->seq_ctrl &
1305 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1307 * This was a fragment of a frame, received while
1308 * a block-ack session was active. That cannot be
1309 * right, so terminate the session.
1311 mutex_lock(&local->sta_mtx);
1312 sta = sta_info_get_bss(sdata, mgmt->sa);
1314 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1315 IEEE80211_QOS_CTL_TID_MASK;
1317 __ieee80211_stop_rx_ba_session(
1318 sta, tid, WLAN_BACK_RECIPIENT,
1319 WLAN_REASON_QSTA_REQUIRE_SETUP,
1322 mutex_unlock(&local->sta_mtx);
1323 } else switch (sdata->vif.type) {
1324 case NL80211_IFTYPE_STATION:
1325 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1327 case NL80211_IFTYPE_ADHOC:
1328 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1330 case NL80211_IFTYPE_MESH_POINT:
1331 if (!ieee80211_vif_is_mesh(&sdata->vif))
1333 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1336 WARN(1, "frame for unexpected interface type");
1343 /* then other type-dependent work */
1344 switch (sdata->vif.type) {
1345 case NL80211_IFTYPE_STATION:
1346 ieee80211_sta_work(sdata);
1348 case NL80211_IFTYPE_ADHOC:
1349 ieee80211_ibss_work(sdata);
1351 case NL80211_IFTYPE_MESH_POINT:
1352 if (!ieee80211_vif_is_mesh(&sdata->vif))
1354 ieee80211_mesh_work(sdata);
1356 case NL80211_IFTYPE_OCB:
1357 ieee80211_ocb_work(sdata);
1364 static void ieee80211_recalc_smps_work(struct work_struct *work)
1366 struct ieee80211_sub_if_data *sdata =
1367 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1369 ieee80211_recalc_smps(sdata);
1373 * Helper function to initialise an interface to a specific type.
1375 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1376 enum nl80211_iftype type)
1378 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1381 /* clear type-dependent union */
1382 memset(&sdata->u, 0, sizeof(sdata->u));
1384 /* and set some type-dependent values */
1385 sdata->vif.type = type;
1386 sdata->vif.p2p = false;
1387 sdata->wdev.iftype = type;
1389 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1390 sdata->control_port_no_encrypt = false;
1391 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1392 sdata->vif.bss_conf.idle = true;
1394 sdata->noack_map = 0;
1396 /* only monitor/p2p-device differ */
1398 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1399 sdata->dev->type = ARPHRD_ETHER;
1402 skb_queue_head_init(&sdata->skb_queue);
1403 INIT_WORK(&sdata->work, ieee80211_iface_work);
1404 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1405 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
1406 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
1407 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
1410 case NL80211_IFTYPE_P2P_GO:
1411 type = NL80211_IFTYPE_AP;
1412 sdata->vif.type = type;
1413 sdata->vif.p2p = true;
1415 case NL80211_IFTYPE_AP:
1416 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1417 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1418 INIT_WORK(&sdata->u.ap.request_smps_work,
1419 ieee80211_request_smps_ap_work);
1420 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1421 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
1423 case NL80211_IFTYPE_P2P_CLIENT:
1424 type = NL80211_IFTYPE_STATION;
1425 sdata->vif.type = type;
1426 sdata->vif.p2p = true;
1428 case NL80211_IFTYPE_STATION:
1429 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1430 ieee80211_sta_setup_sdata(sdata);
1432 case NL80211_IFTYPE_OCB:
1433 sdata->vif.bss_conf.bssid = bssid_wildcard;
1434 ieee80211_ocb_setup_sdata(sdata);
1436 case NL80211_IFTYPE_ADHOC:
1437 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1438 ieee80211_ibss_setup_sdata(sdata);
1440 case NL80211_IFTYPE_MESH_POINT:
1441 if (ieee80211_vif_is_mesh(&sdata->vif))
1442 ieee80211_mesh_init_sdata(sdata);
1444 case NL80211_IFTYPE_MONITOR:
1445 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1446 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1447 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1448 MONITOR_FLAG_OTHER_BSS;
1450 case NL80211_IFTYPE_WDS:
1451 sdata->vif.bss_conf.bssid = NULL;
1453 case NL80211_IFTYPE_AP_VLAN:
1454 case NL80211_IFTYPE_P2P_DEVICE:
1455 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1457 case NL80211_IFTYPE_UNSPECIFIED:
1458 case NUM_NL80211_IFTYPES:
1463 ieee80211_debugfs_add_netdev(sdata);
1466 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1467 enum nl80211_iftype type)
1469 struct ieee80211_local *local = sdata->local;
1471 enum nl80211_iftype internal_type = type;
1476 if (!local->ops->change_interface)
1479 switch (sdata->vif.type) {
1480 case NL80211_IFTYPE_AP:
1481 case NL80211_IFTYPE_STATION:
1482 case NL80211_IFTYPE_ADHOC:
1483 case NL80211_IFTYPE_OCB:
1485 * Could maybe also all others here?
1486 * Just not sure how that interacts
1487 * with the RX/config path e.g. for
1496 case NL80211_IFTYPE_AP:
1497 case NL80211_IFTYPE_STATION:
1498 case NL80211_IFTYPE_ADHOC:
1499 case NL80211_IFTYPE_OCB:
1501 * Could probably support everything
1502 * but WDS here (WDS do_open can fail
1503 * under memory pressure, which this
1504 * code isn't prepared to handle).
1507 case NL80211_IFTYPE_P2P_CLIENT:
1509 internal_type = NL80211_IFTYPE_STATION;
1511 case NL80211_IFTYPE_P2P_GO:
1513 internal_type = NL80211_IFTYPE_AP;
1519 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1523 ieee80211_do_stop(sdata, false);
1525 ieee80211_teardown_sdata(sdata);
1527 ret = drv_change_interface(local, sdata, internal_type, p2p);
1529 type = ieee80211_vif_type_p2p(&sdata->vif);
1532 * Ignore return value here, there's not much we can do since
1533 * the driver changed the interface type internally already.
1534 * The warnings will hopefully make driver authors fix it :-)
1536 ieee80211_check_queues(sdata, type);
1538 ieee80211_setup_sdata(sdata, type);
1540 err = ieee80211_do_open(&sdata->wdev, false);
1541 WARN(err, "type change: do_open returned %d", err);
1546 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1547 enum nl80211_iftype type)
1553 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1556 if (ieee80211_sdata_running(sdata)) {
1557 ret = ieee80211_runtime_change_iftype(sdata, type);
1561 /* Purge and reset type-dependent state. */
1562 ieee80211_teardown_sdata(sdata);
1563 ieee80211_setup_sdata(sdata, type);
1566 /* reset some values that shouldn't be kept across type changes */
1567 if (type == NL80211_IFTYPE_STATION)
1568 sdata->u.mgd.use_4addr = false;
1573 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1574 u8 *perm_addr, enum nl80211_iftype type)
1576 struct ieee80211_sub_if_data *sdata;
1577 u64 mask, start, addr, val, inc;
1579 u8 tmp_addr[ETH_ALEN];
1582 /* default ... something at least */
1583 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1585 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1586 local->hw.wiphy->n_addresses <= 1)
1589 mutex_lock(&local->iflist_mtx);
1592 case NL80211_IFTYPE_MONITOR:
1593 /* doesn't matter */
1595 case NL80211_IFTYPE_WDS:
1596 case NL80211_IFTYPE_AP_VLAN:
1597 /* match up with an AP interface */
1598 list_for_each_entry(sdata, &local->interfaces, list) {
1599 if (sdata->vif.type != NL80211_IFTYPE_AP)
1601 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1604 /* keep default if no AP interface present */
1606 case NL80211_IFTYPE_P2P_CLIENT:
1607 case NL80211_IFTYPE_P2P_GO:
1608 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
1609 list_for_each_entry(sdata, &local->interfaces, list) {
1610 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1612 if (!ieee80211_sdata_running(sdata))
1614 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1618 /* otherwise fall through */
1620 /* assign a new address if possible -- try n_addresses first */
1621 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1624 list_for_each_entry(sdata, &local->interfaces, list) {
1625 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1634 local->hw.wiphy->addresses[i].addr,
1640 /* try mask if available */
1641 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1644 m = local->hw.wiphy->addr_mask;
1645 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1646 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1647 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1649 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1650 /* not a contiguous mask ... not handled now! */
1651 pr_info("not contiguous\n");
1656 * Pick address of existing interface in case user changed
1657 * MAC address manually, default to perm_addr.
1659 m = local->hw.wiphy->perm_addr;
1660 list_for_each_entry(sdata, &local->interfaces, list) {
1661 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1663 m = sdata->vif.addr;
1666 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1667 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1668 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1670 inc = 1ULL<<__ffs64(mask);
1671 val = (start & mask);
1672 addr = (start & ~mask) | (val & mask);
1676 tmp_addr[5] = addr >> 0*8;
1677 tmp_addr[4] = addr >> 1*8;
1678 tmp_addr[3] = addr >> 2*8;
1679 tmp_addr[2] = addr >> 3*8;
1680 tmp_addr[1] = addr >> 4*8;
1681 tmp_addr[0] = addr >> 5*8;
1685 list_for_each_entry(sdata, &local->interfaces, list) {
1686 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
1693 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1696 addr = (start & ~mask) | (val & mask);
1697 } while (addr != start);
1703 mutex_unlock(&local->iflist_mtx);
1706 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1707 unsigned char name_assign_type,
1708 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1709 struct vif_params *params)
1711 struct net_device *ndev = NULL;
1712 struct ieee80211_sub_if_data *sdata = NULL;
1713 struct txq_info *txqi;
1714 void (*if_setup)(struct net_device *dev);
1720 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1721 struct wireless_dev *wdev;
1723 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1727 wdev = &sdata->wdev;
1730 strlcpy(sdata->name, name, IFNAMSIZ);
1731 ieee80211_assign_perm_addr(local, wdev->address, type);
1732 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1734 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1738 if (local->ops->wake_tx_queue)
1739 txq_size += sizeof(struct txq_info) +
1740 local->hw.txq_data_size;
1742 if (local->ops->wake_tx_queue)
1743 if_setup = ieee80211_if_setup_no_queue;
1745 if_setup = ieee80211_if_setup;
1747 if (local->hw.queues >= IEEE80211_NUM_ACS)
1748 txqs = IEEE80211_NUM_ACS;
1750 ndev = alloc_netdev_mqs(size + txq_size,
1751 name, name_assign_type,
1755 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1757 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1758 if (!ndev->tstats) {
1763 ndev->needed_headroom = local->tx_headroom +
1764 4*6 /* four MAC addresses */
1765 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1767 + 8 /* rfc1042/bridge tunnel */
1768 - ETH_HLEN /* ethernet hard_header_len */
1769 + IEEE80211_ENCRYPT_HEADROOM;
1770 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1772 ret = dev_alloc_name(ndev, ndev->name);
1774 ieee80211_if_free(ndev);
1778 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1779 if (params && is_valid_ether_addr(params->macaddr))
1780 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1782 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1783 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1785 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1786 sdata = netdev_priv(ndev);
1787 ndev->ieee80211_ptr = &sdata->wdev;
1788 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1789 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1792 txqi = netdev_priv(ndev) + size;
1793 ieee80211_txq_init(sdata, NULL, txqi, 0);
1799 /* initialise type-independent data */
1800 sdata->wdev.wiphy = local->hw.wiphy;
1801 sdata->local = local;
1803 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1804 skb_queue_head_init(&sdata->fragments[i].skb_list);
1806 INIT_LIST_HEAD(&sdata->key_list);
1808 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1809 ieee80211_dfs_cac_timer_work);
1810 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1811 ieee80211_delayed_tailroom_dec);
1813 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1814 struct ieee80211_supported_band *sband;
1815 sband = local->hw.wiphy->bands[i];
1816 sdata->rc_rateidx_mask[i] =
1817 sband ? (1 << sband->n_bitrates) - 1 : 0;
1822 memcpy(sdata->rc_rateidx_mcs_mask[i],
1823 sband->ht_cap.mcs.rx_mask,
1824 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1826 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1827 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1828 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1830 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1831 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1832 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1833 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1837 ieee80211_set_default_queues(sdata);
1839 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1840 sdata->user_power_level = local->user_power_level;
1842 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1844 /* setup type-dependent data */
1845 ieee80211_setup_sdata(sdata, type);
1849 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1850 if (type == NL80211_IFTYPE_STATION)
1851 sdata->u.mgd.use_4addr = params->use_4addr;
1854 ndev->features |= local->hw.netdev_features;
1856 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1858 ret = register_netdevice(ndev);
1860 ieee80211_if_free(ndev);
1865 mutex_lock(&local->iflist_mtx);
1866 list_add_tail_rcu(&sdata->list, &local->interfaces);
1867 mutex_unlock(&local->iflist_mtx);
1870 *new_wdev = &sdata->wdev;
1875 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1879 mutex_lock(&sdata->local->iflist_mtx);
1880 list_del_rcu(&sdata->list);
1881 mutex_unlock(&sdata->local->iflist_mtx);
1886 unregister_netdevice(sdata->dev);
1888 cfg80211_unregister_wdev(&sdata->wdev);
1889 ieee80211_teardown_sdata(sdata);
1894 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1896 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1898 ieee80211_do_stop(sdata, true);
1901 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1903 struct ieee80211_sub_if_data *sdata, *tmp;
1904 LIST_HEAD(unreg_list);
1905 LIST_HEAD(wdev_list);
1909 /* Before destroying the interfaces, make sure they're all stopped so
1910 * that the hardware is stopped. Otherwise, the driver might still be
1911 * iterating the interfaces during the shutdown, e.g. from a worker
1912 * or from RX processing or similar, and if it does so (using atomic
1913 * iteration) while we're manipulating the list, the iteration will
1916 * After this, the hardware should be stopped and the driver should
1917 * have stopped all of its activities, so that we can do RCU-unaware
1918 * manipulations of the interface list below.
1920 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1922 WARN(local->open_count, "%s: open count remains %d\n",
1923 wiphy_name(local->hw.wiphy), local->open_count);
1925 mutex_lock(&local->iflist_mtx);
1926 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1927 list_del(&sdata->list);
1930 unregister_netdevice_queue(sdata->dev, &unreg_list);
1932 list_add(&sdata->list, &wdev_list);
1934 mutex_unlock(&local->iflist_mtx);
1935 unregister_netdevice_many(&unreg_list);
1937 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1938 list_del(&sdata->list);
1939 cfg80211_unregister_wdev(&sdata->wdev);
1944 static int netdev_notify(struct notifier_block *nb,
1945 unsigned long state, void *ptr)
1947 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1948 struct ieee80211_sub_if_data *sdata;
1950 if (state != NETDEV_CHANGENAME)
1953 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1956 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1959 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1960 memcpy(sdata->name, dev->name, IFNAMSIZ);
1961 ieee80211_debugfs_rename_netdev(sdata);
1966 static struct notifier_block mac80211_netdev_notifier = {
1967 .notifier_call = netdev_notify,
1970 int ieee80211_iface_init(void)
1972 return register_netdevice_notifier(&mac80211_netdev_notifier);
1975 void ieee80211_iface_exit(void)
1977 unregister_netdevice_notifier(&mac80211_netdev_notifier);