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;
783 struct sk_buff *skb, *tmp;
784 u32 hw_reconf_flags = 0;
787 struct cfg80211_chan_def chandef;
790 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
792 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
794 ieee80211_scan_cancel(local);
797 * Stop TX on this interface first.
800 netif_tx_stop_all_queues(sdata->dev);
802 ieee80211_roc_purge(local, sdata);
804 switch (sdata->vif.type) {
805 case NL80211_IFTYPE_STATION:
806 ieee80211_mgd_stop(sdata);
808 case NL80211_IFTYPE_ADHOC:
809 ieee80211_ibss_stop(sdata);
811 case NL80211_IFTYPE_AP:
812 cancel_work_sync(&sdata->u.ap.request_smps_work);
819 * Remove all stations associated with this interface.
821 * This must be done before calling ops->remove_interface()
822 * because otherwise we can later invoke ops->sta_notify()
823 * whenever the STAs are removed, and that invalidates driver
824 * assumptions about always getting a vif pointer that is valid
825 * (because if we remove a STA after ops->remove_interface()
826 * the driver will have removed the vif info already!)
828 * In WDS mode a station must exist here and be flushed, for
829 * AP_VLANs stations may exist since there's nothing else that
830 * would have removed them, but in other modes there shouldn't
833 flushed = sta_info_flush(sdata);
834 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
835 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
836 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
838 /* don't count this interface for allmulti while it is down */
839 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
840 atomic_dec(&local->iff_allmultis);
842 if (sdata->vif.type == NL80211_IFTYPE_AP) {
844 local->fif_probe_req--;
845 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
846 local->fif_probe_req--;
850 netif_addr_lock_bh(sdata->dev);
851 spin_lock_bh(&local->filter_lock);
852 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
853 sdata->dev->addr_len);
854 spin_unlock_bh(&local->filter_lock);
855 netif_addr_unlock_bh(sdata->dev);
858 del_timer_sync(&local->dynamic_ps_timer);
859 cancel_work_sync(&local->dynamic_ps_enable_work);
861 cancel_work_sync(&sdata->recalc_smps);
863 mutex_lock(&local->mtx);
864 sdata->vif.csa_active = false;
865 if (sdata->vif.type == NL80211_IFTYPE_STATION)
866 sdata->u.mgd.csa_waiting_bcn = false;
867 if (sdata->csa_block_tx) {
868 ieee80211_wake_vif_queues(local, sdata,
869 IEEE80211_QUEUE_STOP_REASON_CSA);
870 sdata->csa_block_tx = false;
872 mutex_unlock(&local->mtx);
875 cancel_work_sync(&sdata->csa_finalize_work);
877 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
879 if (sdata->wdev.cac_started) {
880 chandef = sdata->vif.bss_conf.chandef;
881 WARN_ON(local->suspended);
882 mutex_lock(&local->mtx);
883 ieee80211_vif_release_channel(sdata);
884 mutex_unlock(&local->mtx);
885 cfg80211_cac_event(sdata->dev, &chandef,
886 NL80211_RADAR_CAC_ABORTED,
890 /* APs need special treatment */
891 if (sdata->vif.type == NL80211_IFTYPE_AP) {
892 struct ieee80211_sub_if_data *vlan, *tmpsdata;
894 /* down all dependent devices, that is VLANs */
895 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
897 dev_close(vlan->dev);
898 WARN_ON(!list_empty(&sdata->u.ap.vlans));
899 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
900 /* remove all packets in parent bc_buf pointing to this dev */
901 ps = &sdata->bss->ps;
903 spin_lock_irqsave(&ps->bc_buf.lock, flags);
904 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
905 if (skb->dev == sdata->dev) {
906 __skb_unlink(skb, &ps->bc_buf);
907 local->total_ps_buffered--;
908 ieee80211_free_txskb(&local->hw, skb);
911 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
917 switch (sdata->vif.type) {
918 case NL80211_IFTYPE_AP_VLAN:
919 mutex_lock(&local->mtx);
920 list_del(&sdata->u.vlan.list);
921 mutex_unlock(&local->mtx);
922 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
923 /* see comment in the default case below */
924 ieee80211_free_keys(sdata, true);
925 /* no need to tell driver */
927 case NL80211_IFTYPE_MONITOR:
928 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
929 local->cooked_mntrs--;
934 if (local->monitors == 0) {
935 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
936 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
939 ieee80211_adjust_monitor_flags(sdata, -1);
941 case NL80211_IFTYPE_P2P_DEVICE:
942 /* relies on synchronize_rcu() below */
943 RCU_INIT_POINTER(local->p2p_sdata, NULL);
946 cancel_work_sync(&sdata->work);
948 * When we get here, the interface is marked down.
949 * Free the remaining keys, if there are any
950 * (which can happen in AP mode if userspace sets
951 * keys before the interface is operating, and maybe
954 * Force the key freeing to always synchronize_net()
955 * to wait for the RX path in case it is using this
956 * interface enqueuing frames at this very time on
959 ieee80211_free_keys(sdata, true);
960 skb_queue_purge(&sdata->skb_queue);
965 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
966 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
967 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
968 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
969 if (info->control.vif == &sdata->vif) {
970 __skb_unlink(skb, &local->pending[i]);
971 ieee80211_free_txskb(&local->hw, skb);
975 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
977 if (sdata->vif.txq) {
978 struct txq_info *txqi = to_txq_info(sdata->vif.txq);
980 spin_lock_bh(&txqi->queue.lock);
981 ieee80211_purge_tx_queue(&local->hw, &txqi->queue);
982 spin_unlock_bh(&txqi->queue.lock);
984 atomic_set(&sdata->txqs_len[txqi->txq.ac], 0);
987 if (local->open_count == 0)
988 ieee80211_clear_tx_pending(local);
991 * If the interface goes down while suspended, presumably because
992 * the device was unplugged and that happens before our resume,
993 * then the driver is already unconfigured and the remainder of
994 * this function isn't needed.
995 * XXX: what about WoWLAN? If the device has software state, e.g.
996 * memory allocated, it might expect teardown commands from
999 if (local->suspended) {
1000 WARN_ON(local->wowlan);
1001 WARN_ON(rtnl_dereference(local->monitor_sdata));
1005 switch (sdata->vif.type) {
1006 case NL80211_IFTYPE_AP_VLAN:
1008 case NL80211_IFTYPE_MONITOR:
1009 if (local->monitors == 0)
1010 ieee80211_del_virtual_monitor(local);
1012 mutex_lock(&local->mtx);
1013 ieee80211_recalc_idle(local);
1014 mutex_unlock(&local->mtx);
1016 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
1022 drv_remove_interface(local, sdata);
1025 ieee80211_recalc_ps(local);
1028 flush_delayed_work(&local->scan_work);
1030 if (local->open_count == 0) {
1031 ieee80211_stop_device(local);
1033 /* no reconfiguring after stop! */
1037 /* do after stop to avoid reconfiguring when we stop anyway */
1038 ieee80211_configure_filter(local);
1039 ieee80211_hw_config(local, hw_reconf_flags);
1041 if (local->monitors == local->open_count)
1042 ieee80211_add_virtual_monitor(local);
1045 static int ieee80211_stop(struct net_device *dev)
1047 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1049 ieee80211_do_stop(sdata, true);
1054 static void ieee80211_set_multicast_list(struct net_device *dev)
1056 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1057 struct ieee80211_local *local = sdata->local;
1058 int allmulti, sdata_allmulti;
1060 allmulti = !!(dev->flags & IFF_ALLMULTI);
1061 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
1063 if (allmulti != sdata_allmulti) {
1064 if (dev->flags & IFF_ALLMULTI)
1065 atomic_inc(&local->iff_allmultis);
1067 atomic_dec(&local->iff_allmultis);
1068 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1071 spin_lock_bh(&local->filter_lock);
1072 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
1073 spin_unlock_bh(&local->filter_lock);
1074 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
1078 * Called when the netdev is removed or, by the code below, before
1079 * the interface type changes.
1081 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1085 /* free extra data */
1086 ieee80211_free_keys(sdata, false);
1088 ieee80211_debugfs_remove_netdev(sdata);
1090 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1091 __skb_queue_purge(&sdata->fragments[i].skb_list);
1092 sdata->fragment_next = 0;
1094 if (ieee80211_vif_is_mesh(&sdata->vif))
1095 mesh_rmc_free(sdata);
1098 static void ieee80211_uninit(struct net_device *dev)
1100 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1103 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
1104 struct sk_buff *skb,
1106 select_queue_fallback_t fallback)
1108 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1111 static struct rtnl_link_stats64 *
1112 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1116 for_each_possible_cpu(i) {
1117 const struct pcpu_sw_netstats *tstats;
1118 u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
1121 tstats = per_cpu_ptr(dev->tstats, i);
1124 start = u64_stats_fetch_begin_irq(&tstats->syncp);
1125 rx_packets = tstats->rx_packets;
1126 tx_packets = tstats->tx_packets;
1127 rx_bytes = tstats->rx_bytes;
1128 tx_bytes = tstats->tx_bytes;
1129 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
1131 stats->rx_packets += rx_packets;
1132 stats->tx_packets += tx_packets;
1133 stats->rx_bytes += rx_bytes;
1134 stats->tx_bytes += tx_bytes;
1140 static const struct net_device_ops ieee80211_dataif_ops = {
1141 .ndo_open = ieee80211_open,
1142 .ndo_stop = ieee80211_stop,
1143 .ndo_uninit = ieee80211_uninit,
1144 .ndo_start_xmit = ieee80211_subif_start_xmit,
1145 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1146 .ndo_change_mtu = ieee80211_change_mtu,
1147 .ndo_set_mac_address = ieee80211_change_mac,
1148 .ndo_select_queue = ieee80211_netdev_select_queue,
1149 .ndo_get_stats64 = ieee80211_get_stats64,
1152 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
1153 struct sk_buff *skb,
1155 select_queue_fallback_t fallback)
1157 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1158 struct ieee80211_local *local = sdata->local;
1159 struct ieee80211_hdr *hdr;
1160 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1162 if (local->hw.queues < IEEE80211_NUM_ACS)
1166 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
1167 return 0; /* doesn't matter, frame will be dropped */
1169 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
1171 return ieee80211_select_queue_80211(sdata, skb, hdr);
1174 static const struct net_device_ops ieee80211_monitorif_ops = {
1175 .ndo_open = ieee80211_open,
1176 .ndo_stop = ieee80211_stop,
1177 .ndo_uninit = ieee80211_uninit,
1178 .ndo_start_xmit = ieee80211_monitor_start_xmit,
1179 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1180 .ndo_change_mtu = ieee80211_change_mtu,
1181 .ndo_set_mac_address = ieee80211_change_mac,
1182 .ndo_select_queue = ieee80211_monitor_select_queue,
1183 .ndo_get_stats64 = ieee80211_get_stats64,
1186 static void ieee80211_if_free(struct net_device *dev)
1188 free_percpu(dev->tstats);
1192 static void ieee80211_if_setup(struct net_device *dev)
1195 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1196 dev->netdev_ops = &ieee80211_dataif_ops;
1197 dev->destructor = ieee80211_if_free;
1200 static void ieee80211_iface_work(struct work_struct *work)
1202 struct ieee80211_sub_if_data *sdata =
1203 container_of(work, struct ieee80211_sub_if_data, work);
1204 struct ieee80211_local *local = sdata->local;
1205 struct sk_buff *skb;
1206 struct sta_info *sta;
1207 struct ieee80211_ra_tid *ra_tid;
1208 struct ieee80211_rx_agg *rx_agg;
1210 if (!ieee80211_sdata_running(sdata))
1213 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1216 if (!ieee80211_can_run_worker(local))
1219 /* first process frames */
1220 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1221 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1223 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1224 ra_tid = (void *)&skb->cb;
1225 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1227 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1228 ra_tid = (void *)&skb->cb;
1229 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1231 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_START) {
1232 rx_agg = (void *)&skb->cb;
1233 mutex_lock(&local->sta_mtx);
1234 sta = sta_info_get_bss(sdata, rx_agg->addr);
1236 __ieee80211_start_rx_ba_session(sta,
1237 0, 0, 0, 1, rx_agg->tid,
1238 IEEE80211_MAX_AMPDU_BUF,
1240 mutex_unlock(&local->sta_mtx);
1241 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_STOP) {
1242 rx_agg = (void *)&skb->cb;
1243 mutex_lock(&local->sta_mtx);
1244 sta = sta_info_get_bss(sdata, rx_agg->addr);
1246 __ieee80211_stop_rx_ba_session(sta,
1248 WLAN_BACK_RECIPIENT, 0,
1250 mutex_unlock(&local->sta_mtx);
1251 } else if (ieee80211_is_action(mgmt->frame_control) &&
1252 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1255 mutex_lock(&local->sta_mtx);
1256 sta = sta_info_get_bss(sdata, mgmt->sa);
1258 switch (mgmt->u.action.u.addba_req.action_code) {
1259 case WLAN_ACTION_ADDBA_REQ:
1260 ieee80211_process_addba_request(
1261 local, sta, mgmt, len);
1263 case WLAN_ACTION_ADDBA_RESP:
1264 ieee80211_process_addba_resp(local, sta,
1267 case WLAN_ACTION_DELBA:
1268 ieee80211_process_delba(sdata, sta,
1276 mutex_unlock(&local->sta_mtx);
1277 } else if (ieee80211_is_action(mgmt->frame_control) &&
1278 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1279 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1280 case WLAN_VHT_ACTION_GROUPID_MGMT:
1281 ieee80211_process_mu_groups(sdata, mgmt);
1287 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1288 struct ieee80211_hdr *hdr = (void *)mgmt;
1290 * So the frame isn't mgmt, but frame_control
1291 * is at the right place anyway, of course, so
1292 * the if statement is correct.
1294 * Warn if we have other data frame types here,
1295 * they must not get here.
1297 WARN_ON(hdr->frame_control &
1298 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1299 WARN_ON(!(hdr->seq_ctrl &
1300 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1302 * This was a fragment of a frame, received while
1303 * a block-ack session was active. That cannot be
1304 * right, so terminate the session.
1306 mutex_lock(&local->sta_mtx);
1307 sta = sta_info_get_bss(sdata, mgmt->sa);
1309 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1310 IEEE80211_QOS_CTL_TID_MASK;
1312 __ieee80211_stop_rx_ba_session(
1313 sta, tid, WLAN_BACK_RECIPIENT,
1314 WLAN_REASON_QSTA_REQUIRE_SETUP,
1317 mutex_unlock(&local->sta_mtx);
1318 } else switch (sdata->vif.type) {
1319 case NL80211_IFTYPE_STATION:
1320 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1322 case NL80211_IFTYPE_ADHOC:
1323 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1325 case NL80211_IFTYPE_MESH_POINT:
1326 if (!ieee80211_vif_is_mesh(&sdata->vif))
1328 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1331 WARN(1, "frame for unexpected interface type");
1338 /* then other type-dependent work */
1339 switch (sdata->vif.type) {
1340 case NL80211_IFTYPE_STATION:
1341 ieee80211_sta_work(sdata);
1343 case NL80211_IFTYPE_ADHOC:
1344 ieee80211_ibss_work(sdata);
1346 case NL80211_IFTYPE_MESH_POINT:
1347 if (!ieee80211_vif_is_mesh(&sdata->vif))
1349 ieee80211_mesh_work(sdata);
1351 case NL80211_IFTYPE_OCB:
1352 ieee80211_ocb_work(sdata);
1359 static void ieee80211_recalc_smps_work(struct work_struct *work)
1361 struct ieee80211_sub_if_data *sdata =
1362 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1364 ieee80211_recalc_smps(sdata);
1368 * Helper function to initialise an interface to a specific type.
1370 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1371 enum nl80211_iftype type)
1373 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1376 /* clear type-dependent union */
1377 memset(&sdata->u, 0, sizeof(sdata->u));
1379 /* and set some type-dependent values */
1380 sdata->vif.type = type;
1381 sdata->vif.p2p = false;
1382 sdata->wdev.iftype = type;
1384 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1385 sdata->control_port_no_encrypt = false;
1386 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1387 sdata->vif.bss_conf.idle = true;
1389 sdata->noack_map = 0;
1391 /* only monitor/p2p-device differ */
1393 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1394 sdata->dev->type = ARPHRD_ETHER;
1397 skb_queue_head_init(&sdata->skb_queue);
1398 INIT_WORK(&sdata->work, ieee80211_iface_work);
1399 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1400 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
1401 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
1402 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
1405 case NL80211_IFTYPE_P2P_GO:
1406 type = NL80211_IFTYPE_AP;
1407 sdata->vif.type = type;
1408 sdata->vif.p2p = true;
1410 case NL80211_IFTYPE_AP:
1411 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1412 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1413 INIT_WORK(&sdata->u.ap.request_smps_work,
1414 ieee80211_request_smps_ap_work);
1415 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1416 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
1418 case NL80211_IFTYPE_P2P_CLIENT:
1419 type = NL80211_IFTYPE_STATION;
1420 sdata->vif.type = type;
1421 sdata->vif.p2p = true;
1423 case NL80211_IFTYPE_STATION:
1424 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1425 ieee80211_sta_setup_sdata(sdata);
1427 case NL80211_IFTYPE_OCB:
1428 sdata->vif.bss_conf.bssid = bssid_wildcard;
1429 ieee80211_ocb_setup_sdata(sdata);
1431 case NL80211_IFTYPE_ADHOC:
1432 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1433 ieee80211_ibss_setup_sdata(sdata);
1435 case NL80211_IFTYPE_MESH_POINT:
1436 if (ieee80211_vif_is_mesh(&sdata->vif))
1437 ieee80211_mesh_init_sdata(sdata);
1439 case NL80211_IFTYPE_MONITOR:
1440 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1441 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1442 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1443 MONITOR_FLAG_OTHER_BSS;
1445 case NL80211_IFTYPE_WDS:
1446 sdata->vif.bss_conf.bssid = NULL;
1448 case NL80211_IFTYPE_AP_VLAN:
1449 case NL80211_IFTYPE_P2P_DEVICE:
1450 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1452 case NL80211_IFTYPE_UNSPECIFIED:
1453 case NUM_NL80211_IFTYPES:
1458 ieee80211_debugfs_add_netdev(sdata);
1461 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1462 enum nl80211_iftype type)
1464 struct ieee80211_local *local = sdata->local;
1466 enum nl80211_iftype internal_type = type;
1471 if (!local->ops->change_interface)
1474 switch (sdata->vif.type) {
1475 case NL80211_IFTYPE_AP:
1476 case NL80211_IFTYPE_STATION:
1477 case NL80211_IFTYPE_ADHOC:
1478 case NL80211_IFTYPE_OCB:
1480 * Could maybe also all others here?
1481 * Just not sure how that interacts
1482 * with the RX/config path e.g. for
1491 case NL80211_IFTYPE_AP:
1492 case NL80211_IFTYPE_STATION:
1493 case NL80211_IFTYPE_ADHOC:
1494 case NL80211_IFTYPE_OCB:
1496 * Could probably support everything
1497 * but WDS here (WDS do_open can fail
1498 * under memory pressure, which this
1499 * code isn't prepared to handle).
1502 case NL80211_IFTYPE_P2P_CLIENT:
1504 internal_type = NL80211_IFTYPE_STATION;
1506 case NL80211_IFTYPE_P2P_GO:
1508 internal_type = NL80211_IFTYPE_AP;
1514 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1518 ieee80211_do_stop(sdata, false);
1520 ieee80211_teardown_sdata(sdata);
1522 ret = drv_change_interface(local, sdata, internal_type, p2p);
1524 type = ieee80211_vif_type_p2p(&sdata->vif);
1527 * Ignore return value here, there's not much we can do since
1528 * the driver changed the interface type internally already.
1529 * The warnings will hopefully make driver authors fix it :-)
1531 ieee80211_check_queues(sdata, type);
1533 ieee80211_setup_sdata(sdata, type);
1535 err = ieee80211_do_open(&sdata->wdev, false);
1536 WARN(err, "type change: do_open returned %d", err);
1541 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1542 enum nl80211_iftype type)
1548 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1551 if (ieee80211_sdata_running(sdata)) {
1552 ret = ieee80211_runtime_change_iftype(sdata, type);
1556 /* Purge and reset type-dependent state. */
1557 ieee80211_teardown_sdata(sdata);
1558 ieee80211_setup_sdata(sdata, type);
1561 /* reset some values that shouldn't be kept across type changes */
1562 if (type == NL80211_IFTYPE_STATION)
1563 sdata->u.mgd.use_4addr = false;
1568 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1569 u8 *perm_addr, enum nl80211_iftype type)
1571 struct ieee80211_sub_if_data *sdata;
1572 u64 mask, start, addr, val, inc;
1574 u8 tmp_addr[ETH_ALEN];
1577 /* default ... something at least */
1578 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1580 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1581 local->hw.wiphy->n_addresses <= 1)
1584 mutex_lock(&local->iflist_mtx);
1587 case NL80211_IFTYPE_MONITOR:
1588 /* doesn't matter */
1590 case NL80211_IFTYPE_WDS:
1591 case NL80211_IFTYPE_AP_VLAN:
1592 /* match up with an AP interface */
1593 list_for_each_entry(sdata, &local->interfaces, list) {
1594 if (sdata->vif.type != NL80211_IFTYPE_AP)
1596 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1599 /* keep default if no AP interface present */
1601 case NL80211_IFTYPE_P2P_CLIENT:
1602 case NL80211_IFTYPE_P2P_GO:
1603 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
1604 list_for_each_entry(sdata, &local->interfaces, list) {
1605 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1607 if (!ieee80211_sdata_running(sdata))
1609 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1613 /* otherwise fall through */
1615 /* assign a new address if possible -- try n_addresses first */
1616 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1619 list_for_each_entry(sdata, &local->interfaces, list) {
1620 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1629 local->hw.wiphy->addresses[i].addr,
1635 /* try mask if available */
1636 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1639 m = local->hw.wiphy->addr_mask;
1640 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1641 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1642 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1644 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1645 /* not a contiguous mask ... not handled now! */
1646 pr_info("not contiguous\n");
1651 * Pick address of existing interface in case user changed
1652 * MAC address manually, default to perm_addr.
1654 m = local->hw.wiphy->perm_addr;
1655 list_for_each_entry(sdata, &local->interfaces, list) {
1656 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1658 m = sdata->vif.addr;
1661 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1662 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1663 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1665 inc = 1ULL<<__ffs64(mask);
1666 val = (start & mask);
1667 addr = (start & ~mask) | (val & mask);
1671 tmp_addr[5] = addr >> 0*8;
1672 tmp_addr[4] = addr >> 1*8;
1673 tmp_addr[3] = addr >> 2*8;
1674 tmp_addr[2] = addr >> 3*8;
1675 tmp_addr[1] = addr >> 4*8;
1676 tmp_addr[0] = addr >> 5*8;
1680 list_for_each_entry(sdata, &local->interfaces, list) {
1681 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
1688 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1691 addr = (start & ~mask) | (val & mask);
1692 } while (addr != start);
1698 mutex_unlock(&local->iflist_mtx);
1701 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1702 unsigned char name_assign_type,
1703 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1704 struct vif_params *params)
1706 struct net_device *ndev = NULL;
1707 struct ieee80211_sub_if_data *sdata = NULL;
1708 struct txq_info *txqi;
1714 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1715 struct wireless_dev *wdev;
1717 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1721 wdev = &sdata->wdev;
1724 strlcpy(sdata->name, name, IFNAMSIZ);
1725 ieee80211_assign_perm_addr(local, wdev->address, type);
1726 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1728 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1732 if (local->ops->wake_tx_queue)
1733 txq_size += sizeof(struct txq_info) +
1734 local->hw.txq_data_size;
1736 if (local->hw.queues >= IEEE80211_NUM_ACS)
1737 txqs = IEEE80211_NUM_ACS;
1739 ndev = alloc_netdev_mqs(size + txq_size,
1740 name, name_assign_type,
1741 ieee80211_if_setup, txqs, 1);
1744 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1746 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1747 if (!ndev->tstats) {
1752 ndev->needed_headroom = local->tx_headroom +
1753 4*6 /* four MAC addresses */
1754 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1756 + 8 /* rfc1042/bridge tunnel */
1757 - ETH_HLEN /* ethernet hard_header_len */
1758 + IEEE80211_ENCRYPT_HEADROOM;
1759 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1761 ret = dev_alloc_name(ndev, ndev->name);
1767 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1768 if (params && is_valid_ether_addr(params->macaddr))
1769 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1771 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1772 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1774 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1775 sdata = netdev_priv(ndev);
1776 ndev->ieee80211_ptr = &sdata->wdev;
1777 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1778 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1781 txqi = netdev_priv(ndev) + size;
1782 ieee80211_init_tx_queue(sdata, NULL, txqi, 0);
1788 /* initialise type-independent data */
1789 sdata->wdev.wiphy = local->hw.wiphy;
1790 sdata->local = local;
1792 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1793 skb_queue_head_init(&sdata->fragments[i].skb_list);
1795 INIT_LIST_HEAD(&sdata->key_list);
1797 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1798 ieee80211_dfs_cac_timer_work);
1799 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1800 ieee80211_delayed_tailroom_dec);
1802 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1803 struct ieee80211_supported_band *sband;
1804 sband = local->hw.wiphy->bands[i];
1805 sdata->rc_rateidx_mask[i] =
1806 sband ? (1 << sband->n_bitrates) - 1 : 0;
1811 memcpy(sdata->rc_rateidx_mcs_mask[i],
1812 sband->ht_cap.mcs.rx_mask,
1813 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1815 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1816 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1817 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1819 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1820 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1821 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1822 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1826 ieee80211_set_default_queues(sdata);
1828 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1829 sdata->user_power_level = local->user_power_level;
1831 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1833 /* setup type-dependent data */
1834 ieee80211_setup_sdata(sdata, type);
1838 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1839 if (type == NL80211_IFTYPE_STATION)
1840 sdata->u.mgd.use_4addr = params->use_4addr;
1843 ndev->features |= local->hw.netdev_features;
1845 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1847 ret = register_netdevice(ndev);
1854 mutex_lock(&local->iflist_mtx);
1855 list_add_tail_rcu(&sdata->list, &local->interfaces);
1856 mutex_unlock(&local->iflist_mtx);
1859 *new_wdev = &sdata->wdev;
1864 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1868 mutex_lock(&sdata->local->iflist_mtx);
1869 list_del_rcu(&sdata->list);
1870 mutex_unlock(&sdata->local->iflist_mtx);
1875 unregister_netdevice(sdata->dev);
1877 cfg80211_unregister_wdev(&sdata->wdev);
1878 ieee80211_teardown_sdata(sdata);
1883 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1885 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1887 ieee80211_do_stop(sdata, true);
1890 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1892 struct ieee80211_sub_if_data *sdata, *tmp;
1893 LIST_HEAD(unreg_list);
1894 LIST_HEAD(wdev_list);
1898 /* Before destroying the interfaces, make sure they're all stopped so
1899 * that the hardware is stopped. Otherwise, the driver might still be
1900 * iterating the interfaces during the shutdown, e.g. from a worker
1901 * or from RX processing or similar, and if it does so (using atomic
1902 * iteration) while we're manipulating the list, the iteration will
1905 * After this, the hardware should be stopped and the driver should
1906 * have stopped all of its activities, so that we can do RCU-unaware
1907 * manipulations of the interface list below.
1909 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1911 WARN(local->open_count, "%s: open count remains %d\n",
1912 wiphy_name(local->hw.wiphy), local->open_count);
1914 mutex_lock(&local->iflist_mtx);
1915 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1916 list_del(&sdata->list);
1919 unregister_netdevice_queue(sdata->dev, &unreg_list);
1921 list_add(&sdata->list, &wdev_list);
1923 mutex_unlock(&local->iflist_mtx);
1924 unregister_netdevice_many(&unreg_list);
1926 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1927 list_del(&sdata->list);
1928 cfg80211_unregister_wdev(&sdata->wdev);
1933 static int netdev_notify(struct notifier_block *nb,
1934 unsigned long state, void *ptr)
1936 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1937 struct ieee80211_sub_if_data *sdata;
1939 if (state != NETDEV_CHANGENAME)
1942 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1945 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1948 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1949 memcpy(sdata->name, dev->name, IFNAMSIZ);
1950 ieee80211_debugfs_rename_netdev(sdata);
1955 static struct notifier_block mac80211_netdev_notifier = {
1956 .notifier_call = netdev_notify,
1959 int ieee80211_iface_init(void)
1961 return register_netdevice_notifier(&mac80211_netdev_notifier);
1964 void ieee80211_iface_exit(void)
1966 unregister_netdevice_notifier(&mac80211_netdev_notifier);