1 // SPDX-License-Identifier: GPL-2.0-only
5 * Copyright 2002-2005, Instant802 Networks, Inc.
6 * Copyright 2005-2006, Devicescape Software, Inc.
7 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
8 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
9 * Copyright 2013-2014 Intel Mobile Communications GmbH
10 * Copyright (c) 2016 Intel Deutschland GmbH
11 * Copyright (C) 2018-2020 Intel Corporation
13 #include <linux/slab.h>
14 #include <linux/kernel.h>
15 #include <linux/if_arp.h>
16 #include <linux/netdevice.h>
17 #include <linux/rtnetlink.h>
18 #include <net/mac80211.h>
19 #include <net/ieee80211_radiotap.h>
20 #include "ieee80211_i.h"
22 #include "debugfs_netdev.h"
25 #include "driver-ops.h"
30 * DOC: Interface list locking
32 * The interface list in each struct ieee80211_local is protected
35 * (1) modifications may only be done under the RTNL
36 * (2) modifications and readers are protected against each other by
38 * (3) modifications are done in an RCU manner so atomic readers
39 * can traverse the list in RCU-safe blocks.
41 * As a consequence, reads (traversals) of the list can be protected
42 * by either the RTNL, the iflist_mtx or RCU.
45 static void ieee80211_iface_work(struct work_struct *work);
47 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
49 struct ieee80211_chanctx_conf *chanctx_conf;
53 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
59 power = ieee80211_chandef_max_power(&chanctx_conf->def);
62 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
63 power = min(power, sdata->user_power_level);
65 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
66 power = min(power, sdata->ap_power_level);
68 if (power != sdata->vif.bss_conf.txpower) {
69 sdata->vif.bss_conf.txpower = power;
70 ieee80211_hw_config(sdata->local, 0);
77 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
80 if (__ieee80211_recalc_txpower(sdata) ||
81 (update_bss && ieee80211_sdata_running(sdata)))
82 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
85 static u32 __ieee80211_idle_off(struct ieee80211_local *local)
87 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
90 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
91 return IEEE80211_CONF_CHANGE_IDLE;
94 static u32 __ieee80211_idle_on(struct ieee80211_local *local)
96 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
99 ieee80211_flush_queues(local, NULL, false);
101 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
102 return IEEE80211_CONF_CHANGE_IDLE;
105 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
108 bool working, scanning, active;
109 unsigned int led_trig_start = 0, led_trig_stop = 0;
111 lockdep_assert_held(&local->mtx);
113 active = force_active ||
114 !list_empty(&local->chanctx_list) ||
117 working = !local->ops->remain_on_channel &&
118 !list_empty(&local->roc_list);
120 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
121 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
123 if (working || scanning)
124 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
126 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
129 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
131 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
133 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
135 if (working || scanning || active)
136 return __ieee80211_idle_off(local);
137 return __ieee80211_idle_on(local);
140 u32 ieee80211_idle_off(struct ieee80211_local *local)
142 return __ieee80211_recalc_idle(local, true);
145 void ieee80211_recalc_idle(struct ieee80211_local *local)
147 u32 change = __ieee80211_recalc_idle(local, false);
149 ieee80211_hw_config(local, change);
152 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
155 struct ieee80211_local *local = sdata->local;
156 struct ieee80211_sub_if_data *iter;
161 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
165 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
166 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
167 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
169 m = local->hw.wiphy->addr_mask;
170 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
171 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
172 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
177 mutex_lock(&local->iflist_mtx);
178 list_for_each_entry(iter, &local->interfaces, list) {
182 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
183 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE))
187 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
188 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
189 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
191 if ((new & ~mask) != (tmp & ~mask)) {
196 mutex_unlock(&local->iflist_mtx);
201 static int ieee80211_change_mac(struct net_device *dev, void *addr)
203 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
204 struct sockaddr *sa = addr;
205 bool check_dup = true;
208 if (ieee80211_sdata_running(sdata))
211 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
212 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
215 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
219 ret = eth_mac_addr(dev, sa);
222 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
227 static inline int identical_mac_addr_allowed(int type1, int type2)
229 return type1 == NL80211_IFTYPE_MONITOR ||
230 type2 == NL80211_IFTYPE_MONITOR ||
231 type1 == NL80211_IFTYPE_P2P_DEVICE ||
232 type2 == NL80211_IFTYPE_P2P_DEVICE ||
233 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
234 (type1 == NL80211_IFTYPE_WDS &&
235 (type2 == NL80211_IFTYPE_WDS ||
236 type2 == NL80211_IFTYPE_AP)) ||
237 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
238 (type1 == NL80211_IFTYPE_AP_VLAN &&
239 (type2 == NL80211_IFTYPE_AP ||
240 type2 == NL80211_IFTYPE_AP_VLAN));
243 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
244 enum nl80211_iftype iftype)
246 struct ieee80211_local *local = sdata->local;
247 struct ieee80211_sub_if_data *nsdata;
252 /* we hold the RTNL here so can safely walk the list */
253 list_for_each_entry(nsdata, &local->interfaces, list) {
254 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
256 * Only OCB and monitor mode may coexist
258 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
259 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
260 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
261 nsdata->vif.type == NL80211_IFTYPE_OCB))
265 * Allow only a single IBSS interface to be up at any
266 * time. This is restricted because beacon distribution
267 * cannot work properly if both are in the same IBSS.
269 * To remove this restriction we'd have to disallow them
270 * from setting the same SSID on different IBSS interfaces
271 * belonging to the same hardware. Then, however, we're
272 * faced with having to adopt two different TSF timers...
274 if (iftype == NL80211_IFTYPE_ADHOC &&
275 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
278 * will not add another interface while any channel
281 if (nsdata->vif.csa_active)
285 * The remaining checks are only performed for interfaces
286 * with the same MAC address.
288 if (!ether_addr_equal(sdata->vif.addr,
293 * check whether it may have the same address
295 if (!identical_mac_addr_allowed(iftype,
300 * can only add VLANs to enabled APs
302 if (iftype == NL80211_IFTYPE_AP_VLAN &&
303 nsdata->vif.type == NL80211_IFTYPE_AP)
304 sdata->bss = &nsdata->u.ap;
308 mutex_lock(&local->chanctx_mtx);
309 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
310 mutex_unlock(&local->chanctx_mtx);
314 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
315 enum nl80211_iftype iftype)
317 int n_queues = sdata->local->hw.queues;
320 if (iftype == NL80211_IFTYPE_NAN)
323 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
324 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
325 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
326 IEEE80211_INVAL_HW_QUEUE))
328 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
334 if ((iftype != NL80211_IFTYPE_AP &&
335 iftype != NL80211_IFTYPE_P2P_GO &&
336 iftype != NL80211_IFTYPE_MESH_POINT) ||
337 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
338 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
342 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
345 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
351 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
354 struct ieee80211_local *local = sdata->local;
355 u32 flags = sdata->u.mntr.flags;
357 #define ADJUST(_f, _s) do { \
358 if (flags & MONITOR_FLAG_##_f) \
359 local->fif_##_s += offset; \
362 ADJUST(FCSFAIL, fcsfail);
363 ADJUST(PLCPFAIL, plcpfail);
364 ADJUST(CONTROL, control);
365 ADJUST(CONTROL, pspoll);
366 ADJUST(OTHER_BSS, other_bss);
371 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
373 struct ieee80211_local *local = sdata->local;
376 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
377 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
378 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
379 else if (local->hw.queues >= IEEE80211_NUM_ACS)
380 sdata->vif.hw_queue[i] = i;
382 sdata->vif.hw_queue[i] = 0;
384 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
387 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
389 struct ieee80211_sub_if_data *sdata;
392 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
397 if (local->monitor_sdata)
400 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
405 sdata->local = local;
406 sdata->vif.type = NL80211_IFTYPE_MONITOR;
407 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
408 wiphy_name(local->hw.wiphy));
409 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
411 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
413 ieee80211_set_default_queues(sdata);
415 ret = drv_add_interface(local, sdata);
417 /* ok .. stupid driver, it asked for this! */
422 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
428 mutex_lock(&local->iflist_mtx);
429 rcu_assign_pointer(local->monitor_sdata, sdata);
430 mutex_unlock(&local->iflist_mtx);
432 mutex_lock(&local->mtx);
433 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
434 IEEE80211_CHANCTX_EXCLUSIVE);
435 mutex_unlock(&local->mtx);
437 mutex_lock(&local->iflist_mtx);
438 RCU_INIT_POINTER(local->monitor_sdata, NULL);
439 mutex_unlock(&local->iflist_mtx);
441 drv_remove_interface(local, sdata);
446 skb_queue_head_init(&sdata->skb_queue);
447 INIT_WORK(&sdata->work, ieee80211_iface_work);
452 void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
454 struct ieee80211_sub_if_data *sdata;
456 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
461 mutex_lock(&local->iflist_mtx);
463 sdata = rcu_dereference_protected(local->monitor_sdata,
464 lockdep_is_held(&local->iflist_mtx));
466 mutex_unlock(&local->iflist_mtx);
470 RCU_INIT_POINTER(local->monitor_sdata, NULL);
471 mutex_unlock(&local->iflist_mtx);
475 mutex_lock(&local->mtx);
476 ieee80211_vif_release_channel(sdata);
477 mutex_unlock(&local->mtx);
479 drv_remove_interface(local, sdata);
485 * NOTE: Be very careful when changing this function, it must NOT return
486 * an error on interface type changes that have been pre-checked, so most
487 * checks should be in ieee80211_check_concurrent_iface.
489 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
491 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
492 struct net_device *dev = wdev->netdev;
493 struct ieee80211_local *local = sdata->local;
494 struct sta_info *sta;
497 u32 hw_reconf_flags = 0;
499 switch (sdata->vif.type) {
500 case NL80211_IFTYPE_WDS:
501 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
504 case NL80211_IFTYPE_AP_VLAN: {
505 struct ieee80211_sub_if_data *master;
510 mutex_lock(&local->mtx);
511 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
512 mutex_unlock(&local->mtx);
514 master = container_of(sdata->bss,
515 struct ieee80211_sub_if_data, u.ap);
516 sdata->control_port_protocol =
517 master->control_port_protocol;
518 sdata->control_port_no_encrypt =
519 master->control_port_no_encrypt;
520 sdata->control_port_over_nl80211 =
521 master->control_port_over_nl80211;
522 sdata->control_port_no_preauth =
523 master->control_port_no_preauth;
524 sdata->vif.cab_queue = master->vif.cab_queue;
525 memcpy(sdata->vif.hw_queue, master->vif.hw_queue,
526 sizeof(sdata->vif.hw_queue));
527 sdata->vif.bss_conf.chandef = master->vif.bss_conf.chandef;
529 mutex_lock(&local->key_mtx);
530 sdata->crypto_tx_tailroom_needed_cnt +=
531 master->crypto_tx_tailroom_needed_cnt;
532 mutex_unlock(&local->key_mtx);
536 case NL80211_IFTYPE_AP:
537 sdata->bss = &sdata->u.ap;
539 case NL80211_IFTYPE_MESH_POINT:
540 case NL80211_IFTYPE_STATION:
541 case NL80211_IFTYPE_MONITOR:
542 case NL80211_IFTYPE_ADHOC:
543 case NL80211_IFTYPE_P2P_DEVICE:
544 case NL80211_IFTYPE_OCB:
545 case NL80211_IFTYPE_NAN:
546 /* no special treatment */
548 case NL80211_IFTYPE_UNSPECIFIED:
549 case NUM_NL80211_IFTYPES:
550 case NL80211_IFTYPE_P2P_CLIENT:
551 case NL80211_IFTYPE_P2P_GO:
557 if (local->open_count == 0) {
558 res = drv_start(local);
561 /* we're brought up, everything changes */
562 hw_reconf_flags = ~0;
563 ieee80211_led_radio(local, true);
564 ieee80211_mod_tpt_led_trig(local,
565 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
569 * Copy the hopefully now-present MAC address to
570 * this interface, if it has the special null one.
572 if (dev && is_zero_ether_addr(dev->dev_addr)) {
573 memcpy(dev->dev_addr,
574 local->hw.wiphy->perm_addr,
576 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
578 if (!is_valid_ether_addr(dev->dev_addr)) {
579 res = -EADDRNOTAVAIL;
584 switch (sdata->vif.type) {
585 case NL80211_IFTYPE_AP_VLAN:
586 /* no need to tell driver, but set carrier and chanctx */
587 if (rtnl_dereference(sdata->bss->beacon)) {
588 ieee80211_vif_vlan_copy_chanctx(sdata);
589 netif_carrier_on(dev);
591 netif_carrier_off(dev);
594 case NL80211_IFTYPE_MONITOR:
595 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
596 local->cooked_mntrs++;
600 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
601 res = drv_add_interface(local, sdata);
604 } else if (local->monitors == 0 && local->open_count == 0) {
605 res = ieee80211_add_virtual_monitor(local);
610 /* must be before the call to ieee80211_configure_filter */
612 if (local->monitors == 1) {
613 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
614 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
617 ieee80211_adjust_monitor_flags(sdata, 1);
618 ieee80211_configure_filter(local);
619 mutex_lock(&local->mtx);
620 ieee80211_recalc_idle(local);
621 mutex_unlock(&local->mtx);
623 netif_carrier_on(dev);
627 ieee80211_del_virtual_monitor(local);
629 res = drv_add_interface(local, sdata);
632 res = ieee80211_check_queues(sdata,
633 ieee80211_vif_type_p2p(&sdata->vif));
635 goto err_del_interface;
638 if (sdata->vif.type == NL80211_IFTYPE_AP) {
640 local->fif_probe_req++;
642 ieee80211_configure_filter(local);
643 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
644 local->fif_probe_req++;
647 if (sdata->vif.probe_req_reg)
648 drv_config_iface_filter(local, sdata,
652 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
653 sdata->vif.type != NL80211_IFTYPE_NAN)
654 changed |= ieee80211_reset_erp_info(sdata);
655 ieee80211_bss_info_change_notify(sdata, changed);
657 switch (sdata->vif.type) {
658 case NL80211_IFTYPE_STATION:
659 case NL80211_IFTYPE_ADHOC:
660 case NL80211_IFTYPE_AP:
661 case NL80211_IFTYPE_MESH_POINT:
662 case NL80211_IFTYPE_OCB:
663 netif_carrier_off(dev);
665 case NL80211_IFTYPE_WDS:
666 case NL80211_IFTYPE_P2P_DEVICE:
667 case NL80211_IFTYPE_NAN:
675 * Set default queue parameters so drivers don't
676 * need to initialise the hardware if the hardware
677 * doesn't start up with sane defaults.
678 * Enable QoS for anything but station interfaces.
680 ieee80211_set_wmm_default(sdata, true,
681 sdata->vif.type != NL80211_IFTYPE_STATION);
684 set_bit(SDATA_STATE_RUNNING, &sdata->state);
686 switch (sdata->vif.type) {
687 case NL80211_IFTYPE_WDS:
688 /* Create STA entry for the WDS peer */
689 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
693 goto err_del_interface;
696 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
697 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
698 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
700 res = sta_info_insert(sta);
702 /* STA has been freed */
703 goto err_del_interface;
706 rate_control_rate_init(sta);
707 netif_carrier_on(dev);
709 case NL80211_IFTYPE_P2P_DEVICE:
710 rcu_assign_pointer(local->p2p_sdata, sdata);
712 case NL80211_IFTYPE_MONITOR:
713 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
715 list_add_tail_rcu(&sdata->u.mntr.list, &local->mon_list);
722 * set_multicast_list will be invoked by the networking core
723 * which will check whether any increments here were done in
724 * error and sync them down to the hardware as filter flags.
726 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
727 atomic_inc(&local->iff_allmultis);
733 ieee80211_hw_config(local, hw_reconf_flags);
735 ieee80211_recalc_ps(local);
737 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
738 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
739 local->ops->wake_tx_queue) {
740 /* XXX: for AP_VLAN, actually track AP queues */
742 netif_tx_start_all_queues(dev);
745 int n_acs = IEEE80211_NUM_ACS;
748 if (local->hw.queues < IEEE80211_NUM_ACS)
751 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
752 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
753 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
754 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
755 for (ac = 0; ac < n_acs; ac++) {
756 int ac_queue = sdata->vif.hw_queue[ac];
758 if (local->queue_stop_reasons[ac_queue] == 0 &&
759 skb_queue_empty(&local->pending[ac_queue]))
760 netif_start_subqueue(dev, ac);
763 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
768 drv_remove_interface(local, sdata);
770 if (!local->open_count)
774 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
775 mutex_lock(&local->mtx);
776 list_del(&sdata->u.vlan.list);
777 mutex_unlock(&local->mtx);
779 /* might already be clear but that doesn't matter */
780 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
784 static int ieee80211_open(struct net_device *dev)
786 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
789 /* fail early if user set an invalid address */
790 if (!is_valid_ether_addr(dev->dev_addr))
791 return -EADDRNOTAVAIL;
793 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
797 return ieee80211_do_open(&sdata->wdev, true);
800 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
803 struct ieee80211_local *local = sdata->local;
805 struct sk_buff *skb, *tmp;
806 u32 hw_reconf_flags = 0;
809 struct cfg80211_chan_def chandef;
811 struct cfg80211_nan_func *func;
813 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
815 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
817 ieee80211_scan_cancel(local);
820 * Stop TX on this interface first.
823 netif_tx_stop_all_queues(sdata->dev);
825 ieee80211_roc_purge(local, sdata);
827 switch (sdata->vif.type) {
828 case NL80211_IFTYPE_STATION:
829 ieee80211_mgd_stop(sdata);
831 case NL80211_IFTYPE_ADHOC:
832 ieee80211_ibss_stop(sdata);
834 case NL80211_IFTYPE_MONITOR:
835 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES)
837 list_del_rcu(&sdata->u.mntr.list);
844 * Remove all stations associated with this interface.
846 * This must be done before calling ops->remove_interface()
847 * because otherwise we can later invoke ops->sta_notify()
848 * whenever the STAs are removed, and that invalidates driver
849 * assumptions about always getting a vif pointer that is valid
850 * (because if we remove a STA after ops->remove_interface()
851 * the driver will have removed the vif info already!)
853 * In WDS mode a station must exist here and be flushed, for
854 * AP_VLANs stations may exist since there's nothing else that
855 * would have removed them, but in other modes there shouldn't
858 flushed = sta_info_flush(sdata);
859 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
860 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
861 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
863 /* don't count this interface for allmulti while it is down */
864 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
865 atomic_dec(&local->iff_allmultis);
867 if (sdata->vif.type == NL80211_IFTYPE_AP) {
869 local->fif_probe_req--;
870 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
871 local->fif_probe_req--;
875 netif_addr_lock_bh(sdata->dev);
876 spin_lock_bh(&local->filter_lock);
877 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
878 sdata->dev->addr_len);
879 spin_unlock_bh(&local->filter_lock);
880 netif_addr_unlock_bh(sdata->dev);
883 del_timer_sync(&local->dynamic_ps_timer);
884 cancel_work_sync(&local->dynamic_ps_enable_work);
886 cancel_work_sync(&sdata->recalc_smps);
888 mutex_lock(&local->mtx);
889 sdata->vif.csa_active = false;
890 if (sdata->vif.type == NL80211_IFTYPE_STATION)
891 sdata->u.mgd.csa_waiting_bcn = false;
892 if (sdata->csa_block_tx) {
893 ieee80211_wake_vif_queues(local, sdata,
894 IEEE80211_QUEUE_STOP_REASON_CSA);
895 sdata->csa_block_tx = false;
897 mutex_unlock(&local->mtx);
900 cancel_work_sync(&sdata->csa_finalize_work);
902 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
904 if (sdata->wdev.cac_started) {
905 chandef = sdata->vif.bss_conf.chandef;
906 WARN_ON(local->suspended);
907 mutex_lock(&local->mtx);
908 ieee80211_vif_release_channel(sdata);
909 mutex_unlock(&local->mtx);
910 cfg80211_cac_event(sdata->dev, &chandef,
911 NL80211_RADAR_CAC_ABORTED,
915 /* APs need special treatment */
916 if (sdata->vif.type == NL80211_IFTYPE_AP) {
917 struct ieee80211_sub_if_data *vlan, *tmpsdata;
919 /* down all dependent devices, that is VLANs */
920 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
922 dev_close(vlan->dev);
923 WARN_ON(!list_empty(&sdata->u.ap.vlans));
924 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
925 /* remove all packets in parent bc_buf pointing to this dev */
926 ps = &sdata->bss->ps;
928 spin_lock_irqsave(&ps->bc_buf.lock, flags);
929 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
930 if (skb->dev == sdata->dev) {
931 __skb_unlink(skb, &ps->bc_buf);
932 local->total_ps_buffered--;
933 ieee80211_free_txskb(&local->hw, skb);
936 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
942 switch (sdata->vif.type) {
943 case NL80211_IFTYPE_AP_VLAN:
944 mutex_lock(&local->mtx);
945 list_del(&sdata->u.vlan.list);
946 mutex_unlock(&local->mtx);
947 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
948 /* see comment in the default case below */
949 ieee80211_free_keys(sdata, true);
950 /* no need to tell driver */
952 case NL80211_IFTYPE_MONITOR:
953 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
954 local->cooked_mntrs--;
959 if (local->monitors == 0) {
960 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
961 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
964 ieee80211_adjust_monitor_flags(sdata, -1);
966 case NL80211_IFTYPE_NAN:
967 /* clean all the functions */
968 spin_lock_bh(&sdata->u.nan.func_lock);
970 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
971 idr_remove(&sdata->u.nan.function_inst_ids, i);
972 cfg80211_free_nan_func(func);
974 idr_destroy(&sdata->u.nan.function_inst_ids);
976 spin_unlock_bh(&sdata->u.nan.func_lock);
978 case NL80211_IFTYPE_P2P_DEVICE:
979 /* relies on synchronize_rcu() below */
980 RCU_INIT_POINTER(local->p2p_sdata, NULL);
983 cancel_work_sync(&sdata->work);
985 * When we get here, the interface is marked down.
986 * Free the remaining keys, if there are any
987 * (which can happen in AP mode if userspace sets
988 * keys before the interface is operating, and maybe
991 * Force the key freeing to always synchronize_net()
992 * to wait for the RX path in case it is using this
993 * interface enqueuing frames at this very time on
996 ieee80211_free_keys(sdata, true);
997 skb_queue_purge(&sdata->skb_queue);
1000 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1001 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
1002 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
1003 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1004 if (info->control.vif == &sdata->vif) {
1005 __skb_unlink(skb, &local->pending[i]);
1006 ieee80211_free_txskb(&local->hw, skb);
1010 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1012 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
1013 ieee80211_txq_remove_vlan(local, sdata);
1017 if (local->open_count == 0)
1018 ieee80211_clear_tx_pending(local);
1020 sdata->vif.bss_conf.beacon_int = 0;
1023 * If the interface goes down while suspended, presumably because
1024 * the device was unplugged and that happens before our resume,
1025 * then the driver is already unconfigured and the remainder of
1026 * this function isn't needed.
1027 * XXX: what about WoWLAN? If the device has software state, e.g.
1028 * memory allocated, it might expect teardown commands from
1031 if (local->suspended) {
1032 WARN_ON(local->wowlan);
1033 WARN_ON(rtnl_dereference(local->monitor_sdata));
1037 switch (sdata->vif.type) {
1038 case NL80211_IFTYPE_AP_VLAN:
1040 case NL80211_IFTYPE_MONITOR:
1041 if (local->monitors == 0)
1042 ieee80211_del_virtual_monitor(local);
1044 mutex_lock(&local->mtx);
1045 ieee80211_recalc_idle(local);
1046 mutex_unlock(&local->mtx);
1048 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
1054 drv_remove_interface(local, sdata);
1057 ieee80211_recalc_ps(local);
1060 flush_delayed_work(&local->scan_work);
1062 if (local->open_count == 0) {
1063 ieee80211_stop_device(local);
1065 /* no reconfiguring after stop! */
1069 /* do after stop to avoid reconfiguring when we stop anyway */
1070 ieee80211_configure_filter(local);
1071 ieee80211_hw_config(local, hw_reconf_flags);
1073 if (local->monitors == local->open_count)
1074 ieee80211_add_virtual_monitor(local);
1077 static int ieee80211_stop(struct net_device *dev)
1079 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1081 ieee80211_do_stop(sdata, true);
1086 static void ieee80211_set_multicast_list(struct net_device *dev)
1088 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1089 struct ieee80211_local *local = sdata->local;
1090 int allmulti, sdata_allmulti;
1092 allmulti = !!(dev->flags & IFF_ALLMULTI);
1093 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
1095 if (allmulti != sdata_allmulti) {
1096 if (dev->flags & IFF_ALLMULTI)
1097 atomic_inc(&local->iff_allmultis);
1099 atomic_dec(&local->iff_allmultis);
1100 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1103 spin_lock_bh(&local->filter_lock);
1104 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
1105 spin_unlock_bh(&local->filter_lock);
1106 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
1110 * Called when the netdev is removed or, by the code below, before
1111 * the interface type changes.
1113 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1117 /* free extra data */
1118 ieee80211_free_keys(sdata, false);
1120 ieee80211_debugfs_remove_netdev(sdata);
1122 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1123 __skb_queue_purge(&sdata->fragments[i].skb_list);
1124 sdata->fragment_next = 0;
1126 if (ieee80211_vif_is_mesh(&sdata->vif))
1127 ieee80211_mesh_teardown_sdata(sdata);
1130 static void ieee80211_uninit(struct net_device *dev)
1132 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1135 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
1136 struct sk_buff *skb,
1137 struct net_device *sb_dev)
1139 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1143 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1147 for_each_possible_cpu(i) {
1148 const struct pcpu_sw_netstats *tstats;
1149 u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
1152 tstats = per_cpu_ptr(dev->tstats, i);
1155 start = u64_stats_fetch_begin_irq(&tstats->syncp);
1156 rx_packets = tstats->rx_packets;
1157 tx_packets = tstats->tx_packets;
1158 rx_bytes = tstats->rx_bytes;
1159 tx_bytes = tstats->tx_bytes;
1160 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
1162 stats->rx_packets += rx_packets;
1163 stats->tx_packets += tx_packets;
1164 stats->rx_bytes += rx_bytes;
1165 stats->tx_bytes += tx_bytes;
1169 static const struct net_device_ops ieee80211_dataif_ops = {
1170 .ndo_open = ieee80211_open,
1171 .ndo_stop = ieee80211_stop,
1172 .ndo_uninit = ieee80211_uninit,
1173 .ndo_start_xmit = ieee80211_subif_start_xmit,
1174 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1175 .ndo_set_mac_address = ieee80211_change_mac,
1176 .ndo_select_queue = ieee80211_netdev_select_queue,
1177 .ndo_get_stats64 = ieee80211_get_stats64,
1180 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
1181 struct sk_buff *skb,
1182 struct net_device *sb_dev)
1184 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1185 struct ieee80211_local *local = sdata->local;
1186 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1187 struct ieee80211_hdr *hdr;
1190 if (local->hw.queues < IEEE80211_NUM_ACS)
1193 /* reset flags and info before parsing radiotap header */
1194 memset(info, 0, sizeof(*info));
1196 if (!ieee80211_parse_tx_radiotap(skb, dev))
1197 return 0; /* doesn't matter, frame will be dropped */
1199 len_rthdr = ieee80211_get_radiotap_len(skb->data);
1200 hdr = (struct ieee80211_hdr *)(skb->data + len_rthdr);
1201 if (skb->len < len_rthdr + 2 ||
1202 skb->len < len_rthdr + ieee80211_hdrlen(hdr->frame_control))
1203 return 0; /* doesn't matter, frame will be dropped */
1205 return ieee80211_select_queue_80211(sdata, skb, hdr);
1208 static const struct net_device_ops ieee80211_monitorif_ops = {
1209 .ndo_open = ieee80211_open,
1210 .ndo_stop = ieee80211_stop,
1211 .ndo_uninit = ieee80211_uninit,
1212 .ndo_start_xmit = ieee80211_monitor_start_xmit,
1213 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1214 .ndo_set_mac_address = ieee80211_change_mac,
1215 .ndo_select_queue = ieee80211_monitor_select_queue,
1216 .ndo_get_stats64 = ieee80211_get_stats64,
1219 static const struct net_device_ops ieee80211_dataif_8023_ops = {
1220 .ndo_open = ieee80211_open,
1221 .ndo_stop = ieee80211_stop,
1222 .ndo_uninit = ieee80211_uninit,
1223 .ndo_start_xmit = ieee80211_subif_start_xmit_8023,
1224 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1225 .ndo_set_mac_address = ieee80211_change_mac,
1226 .ndo_select_queue = ieee80211_netdev_select_queue,
1227 .ndo_get_stats64 = ieee80211_get_stats64,
1230 static void __ieee80211_set_hw_80211_encap(struct ieee80211_sub_if_data *sdata,
1233 sdata->dev->netdev_ops = enable ? &ieee80211_dataif_8023_ops :
1234 &ieee80211_dataif_ops;
1235 sdata->hw_80211_encap = enable;
1238 bool ieee80211_set_hw_80211_encap(struct ieee80211_vif *vif, bool enable)
1240 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
1241 struct ieee80211_local *local = sdata->local;
1242 struct ieee80211_sub_if_data *iter;
1243 struct ieee80211_key *key;
1245 mutex_lock(&local->iflist_mtx);
1246 list_for_each_entry(iter, &local->interfaces, list) {
1247 struct ieee80211_sub_if_data *disable = NULL;
1249 if (vif->type == NL80211_IFTYPE_MONITOR) {
1251 __ieee80211_set_hw_80211_encap(iter, false);
1252 } else if (iter->vif.type == NL80211_IFTYPE_MONITOR) {
1258 "disable hw 80211 encap due to mon co-exist\n");
1260 mutex_unlock(&local->iflist_mtx);
1262 if (enable == sdata->hw_80211_encap)
1268 if (!ieee80211_hw_check(&local->hw, SUPPORTS_TX_FRAG) &&
1269 (local->hw.wiphy->frag_threshold != (u32)-1))
1272 mutex_lock(&sdata->local->key_mtx);
1273 list_for_each_entry(key, &sdata->key_list, list) {
1274 if (key->conf.cipher == WLAN_CIPHER_SUITE_TKIP)
1277 mutex_unlock(&sdata->local->key_mtx);
1279 __ieee80211_set_hw_80211_encap(sdata, enable);
1283 EXPORT_SYMBOL(ieee80211_set_hw_80211_encap);
1285 static void ieee80211_if_free(struct net_device *dev)
1287 free_percpu(dev->tstats);
1290 static void ieee80211_if_setup(struct net_device *dev)
1293 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1294 dev->netdev_ops = &ieee80211_dataif_ops;
1295 dev->needs_free_netdev = true;
1296 dev->priv_destructor = ieee80211_if_free;
1299 static void ieee80211_if_setup_no_queue(struct net_device *dev)
1301 ieee80211_if_setup(dev);
1302 dev->priv_flags |= IFF_NO_QUEUE;
1305 static void ieee80211_iface_work(struct work_struct *work)
1307 struct ieee80211_sub_if_data *sdata =
1308 container_of(work, struct ieee80211_sub_if_data, work);
1309 struct ieee80211_local *local = sdata->local;
1310 struct sk_buff *skb;
1311 struct sta_info *sta;
1313 if (!ieee80211_sdata_running(sdata))
1316 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1319 if (!ieee80211_can_run_worker(local))
1322 /* first process frames */
1323 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1324 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1326 if (ieee80211_is_action(mgmt->frame_control) &&
1327 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1330 mutex_lock(&local->sta_mtx);
1331 sta = sta_info_get_bss(sdata, mgmt->sa);
1333 switch (mgmt->u.action.u.addba_req.action_code) {
1334 case WLAN_ACTION_ADDBA_REQ:
1335 ieee80211_process_addba_request(
1336 local, sta, mgmt, len);
1338 case WLAN_ACTION_ADDBA_RESP:
1339 ieee80211_process_addba_resp(local, sta,
1342 case WLAN_ACTION_DELBA:
1343 ieee80211_process_delba(sdata, sta,
1351 mutex_unlock(&local->sta_mtx);
1352 } else if (ieee80211_is_action(mgmt->frame_control) &&
1353 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1354 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1355 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1356 struct ieee80211_rx_status *status;
1357 enum nl80211_band band;
1360 status = IEEE80211_SKB_RXCB(skb);
1361 band = status->band;
1362 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1364 mutex_lock(&local->sta_mtx);
1365 sta = sta_info_get_bss(sdata, mgmt->sa);
1368 ieee80211_vht_handle_opmode(sdata, sta,
1372 mutex_unlock(&local->sta_mtx);
1375 case WLAN_VHT_ACTION_GROUPID_MGMT:
1376 ieee80211_process_mu_groups(sdata, mgmt);
1382 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1383 struct ieee80211_hdr *hdr = (void *)mgmt;
1385 * So the frame isn't mgmt, but frame_control
1386 * is at the right place anyway, of course, so
1387 * the if statement is correct.
1389 * Warn if we have other data frame types here,
1390 * they must not get here.
1392 WARN_ON(hdr->frame_control &
1393 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1394 WARN_ON(!(hdr->seq_ctrl &
1395 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1397 * This was a fragment of a frame, received while
1398 * a block-ack session was active. That cannot be
1399 * right, so terminate the session.
1401 mutex_lock(&local->sta_mtx);
1402 sta = sta_info_get_bss(sdata, mgmt->sa);
1404 u16 tid = ieee80211_get_tid(hdr);
1406 __ieee80211_stop_rx_ba_session(
1407 sta, tid, WLAN_BACK_RECIPIENT,
1408 WLAN_REASON_QSTA_REQUIRE_SETUP,
1411 mutex_unlock(&local->sta_mtx);
1412 } else switch (sdata->vif.type) {
1413 case NL80211_IFTYPE_STATION:
1414 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1416 case NL80211_IFTYPE_ADHOC:
1417 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1419 case NL80211_IFTYPE_MESH_POINT:
1420 if (!ieee80211_vif_is_mesh(&sdata->vif))
1422 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1425 WARN(1, "frame for unexpected interface type");
1432 /* then other type-dependent work */
1433 switch (sdata->vif.type) {
1434 case NL80211_IFTYPE_STATION:
1435 ieee80211_sta_work(sdata);
1437 case NL80211_IFTYPE_ADHOC:
1438 ieee80211_ibss_work(sdata);
1440 case NL80211_IFTYPE_MESH_POINT:
1441 if (!ieee80211_vif_is_mesh(&sdata->vif))
1443 ieee80211_mesh_work(sdata);
1445 case NL80211_IFTYPE_OCB:
1446 ieee80211_ocb_work(sdata);
1453 static void ieee80211_recalc_smps_work(struct work_struct *work)
1455 struct ieee80211_sub_if_data *sdata =
1456 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1458 ieee80211_recalc_smps(sdata);
1462 * Helper function to initialise an interface to a specific type.
1464 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1465 enum nl80211_iftype type)
1467 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1470 /* clear type-dependent union */
1471 memset(&sdata->u, 0, sizeof(sdata->u));
1473 /* and set some type-dependent values */
1474 sdata->vif.type = type;
1475 sdata->vif.p2p = false;
1476 sdata->wdev.iftype = type;
1478 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1479 sdata->control_port_no_encrypt = false;
1480 sdata->control_port_over_nl80211 = false;
1481 sdata->control_port_no_preauth = false;
1482 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1483 sdata->vif.bss_conf.idle = true;
1484 sdata->vif.bss_conf.txpower = INT_MIN; /* unset */
1486 sdata->noack_map = 0;
1487 sdata->hw_80211_encap = false;
1489 /* only monitor/p2p-device differ */
1491 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1492 sdata->dev->type = ARPHRD_ETHER;
1495 skb_queue_head_init(&sdata->skb_queue);
1496 INIT_WORK(&sdata->work, ieee80211_iface_work);
1497 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1498 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
1499 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
1500 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
1503 case NL80211_IFTYPE_P2P_GO:
1504 type = NL80211_IFTYPE_AP;
1505 sdata->vif.type = type;
1506 sdata->vif.p2p = true;
1508 case NL80211_IFTYPE_AP:
1509 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1510 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1511 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1513 case NL80211_IFTYPE_P2P_CLIENT:
1514 type = NL80211_IFTYPE_STATION;
1515 sdata->vif.type = type;
1516 sdata->vif.p2p = true;
1518 case NL80211_IFTYPE_STATION:
1519 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1520 ieee80211_sta_setup_sdata(sdata);
1522 case NL80211_IFTYPE_OCB:
1523 sdata->vif.bss_conf.bssid = bssid_wildcard;
1524 ieee80211_ocb_setup_sdata(sdata);
1526 case NL80211_IFTYPE_ADHOC:
1527 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1528 ieee80211_ibss_setup_sdata(sdata);
1530 case NL80211_IFTYPE_MESH_POINT:
1531 if (ieee80211_vif_is_mesh(&sdata->vif))
1532 ieee80211_mesh_init_sdata(sdata);
1534 case NL80211_IFTYPE_MONITOR:
1535 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1536 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1537 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1538 MONITOR_FLAG_OTHER_BSS;
1540 case NL80211_IFTYPE_WDS:
1541 sdata->vif.bss_conf.bssid = NULL;
1543 case NL80211_IFTYPE_NAN:
1544 idr_init(&sdata->u.nan.function_inst_ids);
1545 spin_lock_init(&sdata->u.nan.func_lock);
1546 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1548 case NL80211_IFTYPE_AP_VLAN:
1549 case NL80211_IFTYPE_P2P_DEVICE:
1550 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1552 case NL80211_IFTYPE_UNSPECIFIED:
1553 case NUM_NL80211_IFTYPES:
1558 ieee80211_debugfs_add_netdev(sdata);
1561 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1562 enum nl80211_iftype type)
1564 struct ieee80211_local *local = sdata->local;
1566 enum nl80211_iftype internal_type = type;
1571 if (!local->ops->change_interface)
1574 switch (sdata->vif.type) {
1575 case NL80211_IFTYPE_AP:
1576 case NL80211_IFTYPE_STATION:
1577 case NL80211_IFTYPE_ADHOC:
1578 case NL80211_IFTYPE_OCB:
1580 * Could maybe also all others here?
1581 * Just not sure how that interacts
1582 * with the RX/config path e.g. for
1591 case NL80211_IFTYPE_AP:
1592 case NL80211_IFTYPE_STATION:
1593 case NL80211_IFTYPE_ADHOC:
1594 case NL80211_IFTYPE_OCB:
1596 * Could probably support everything
1597 * but WDS here (WDS do_open can fail
1598 * under memory pressure, which this
1599 * code isn't prepared to handle).
1602 case NL80211_IFTYPE_P2P_CLIENT:
1604 internal_type = NL80211_IFTYPE_STATION;
1606 case NL80211_IFTYPE_P2P_GO:
1608 internal_type = NL80211_IFTYPE_AP;
1614 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1618 ieee80211_do_stop(sdata, false);
1620 ieee80211_teardown_sdata(sdata);
1622 ret = drv_change_interface(local, sdata, internal_type, p2p);
1624 type = ieee80211_vif_type_p2p(&sdata->vif);
1627 * Ignore return value here, there's not much we can do since
1628 * the driver changed the interface type internally already.
1629 * The warnings will hopefully make driver authors fix it :-)
1631 ieee80211_check_queues(sdata, type);
1633 ieee80211_setup_sdata(sdata, type);
1635 err = ieee80211_do_open(&sdata->wdev, false);
1636 WARN(err, "type change: do_open returned %d", err);
1641 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1642 enum nl80211_iftype type)
1648 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1651 if (ieee80211_sdata_running(sdata)) {
1652 ret = ieee80211_runtime_change_iftype(sdata, type);
1656 /* Purge and reset type-dependent state. */
1657 ieee80211_teardown_sdata(sdata);
1658 ieee80211_setup_sdata(sdata, type);
1661 /* reset some values that shouldn't be kept across type changes */
1662 if (type == NL80211_IFTYPE_STATION)
1663 sdata->u.mgd.use_4addr = false;
1668 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1669 u8 *perm_addr, enum nl80211_iftype type)
1671 struct ieee80211_sub_if_data *sdata;
1672 u64 mask, start, addr, val, inc;
1674 u8 tmp_addr[ETH_ALEN];
1677 /* default ... something at least */
1678 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1680 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1681 local->hw.wiphy->n_addresses <= 1)
1684 mutex_lock(&local->iflist_mtx);
1687 case NL80211_IFTYPE_MONITOR:
1688 /* doesn't matter */
1690 case NL80211_IFTYPE_WDS:
1691 case NL80211_IFTYPE_AP_VLAN:
1692 /* match up with an AP interface */
1693 list_for_each_entry(sdata, &local->interfaces, list) {
1694 if (sdata->vif.type != NL80211_IFTYPE_AP)
1696 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1699 /* keep default if no AP interface present */
1701 case NL80211_IFTYPE_P2P_CLIENT:
1702 case NL80211_IFTYPE_P2P_GO:
1703 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
1704 list_for_each_entry(sdata, &local->interfaces, list) {
1705 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1707 if (!ieee80211_sdata_running(sdata))
1709 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1715 /* assign a new address if possible -- try n_addresses first */
1716 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1719 list_for_each_entry(sdata, &local->interfaces, list) {
1720 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1729 local->hw.wiphy->addresses[i].addr,
1735 /* try mask if available */
1736 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1739 m = local->hw.wiphy->addr_mask;
1740 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1741 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1742 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1744 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1745 /* not a contiguous mask ... not handled now! */
1746 pr_info("not contiguous\n");
1751 * Pick address of existing interface in case user changed
1752 * MAC address manually, default to perm_addr.
1754 m = local->hw.wiphy->perm_addr;
1755 list_for_each_entry(sdata, &local->interfaces, list) {
1756 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1758 m = sdata->vif.addr;
1761 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1762 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1763 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1765 inc = 1ULL<<__ffs64(mask);
1766 val = (start & mask);
1767 addr = (start & ~mask) | (val & mask);
1771 tmp_addr[5] = addr >> 0*8;
1772 tmp_addr[4] = addr >> 1*8;
1773 tmp_addr[3] = addr >> 2*8;
1774 tmp_addr[2] = addr >> 3*8;
1775 tmp_addr[1] = addr >> 4*8;
1776 tmp_addr[0] = addr >> 5*8;
1780 list_for_each_entry(sdata, &local->interfaces, list) {
1781 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
1788 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1791 addr = (start & ~mask) | (val & mask);
1792 } while (addr != start);
1798 mutex_unlock(&local->iflist_mtx);
1801 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1802 unsigned char name_assign_type,
1803 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1804 struct vif_params *params)
1806 struct net_device *ndev = NULL;
1807 struct ieee80211_sub_if_data *sdata = NULL;
1808 struct txq_info *txqi;
1809 void (*if_setup)(struct net_device *dev);
1815 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
1816 struct wireless_dev *wdev;
1818 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1822 wdev = &sdata->wdev;
1825 strlcpy(sdata->name, name, IFNAMSIZ);
1826 ieee80211_assign_perm_addr(local, wdev->address, type);
1827 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1829 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1833 if (local->ops->wake_tx_queue &&
1834 type != NL80211_IFTYPE_AP_VLAN &&
1835 (type != NL80211_IFTYPE_MONITOR ||
1836 (params->flags & MONITOR_FLAG_ACTIVE)))
1837 txq_size += sizeof(struct txq_info) +
1838 local->hw.txq_data_size;
1840 if (local->ops->wake_tx_queue) {
1841 if_setup = ieee80211_if_setup_no_queue;
1843 if_setup = ieee80211_if_setup;
1844 if (local->hw.queues >= IEEE80211_NUM_ACS)
1845 txqs = IEEE80211_NUM_ACS;
1848 ndev = alloc_netdev_mqs(size + txq_size,
1849 name, name_assign_type,
1854 if (!local->ops->wake_tx_queue && local->hw.wiphy->tx_queue_len)
1855 ndev->tx_queue_len = local->hw.wiphy->tx_queue_len;
1857 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1859 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1860 if (!ndev->tstats) {
1865 ndev->needed_headroom = local->tx_headroom +
1866 4*6 /* four MAC addresses */
1867 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1869 + 8 /* rfc1042/bridge tunnel */
1870 - ETH_HLEN /* ethernet hard_header_len */
1871 + IEEE80211_ENCRYPT_HEADROOM;
1872 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1874 ret = dev_alloc_name(ndev, ndev->name);
1876 ieee80211_if_free(ndev);
1881 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1882 if (is_valid_ether_addr(params->macaddr))
1883 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1885 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1886 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1888 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1889 sdata = netdev_priv(ndev);
1890 ndev->ieee80211_ptr = &sdata->wdev;
1891 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1892 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1895 txqi = netdev_priv(ndev) + size;
1896 ieee80211_txq_init(sdata, NULL, txqi, 0);
1902 /* initialise type-independent data */
1903 sdata->wdev.wiphy = local->hw.wiphy;
1904 sdata->local = local;
1906 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1907 skb_queue_head_init(&sdata->fragments[i].skb_list);
1909 INIT_LIST_HEAD(&sdata->key_list);
1911 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1912 ieee80211_dfs_cac_timer_work);
1913 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1914 ieee80211_delayed_tailroom_dec);
1916 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1917 struct ieee80211_supported_band *sband;
1918 sband = local->hw.wiphy->bands[i];
1919 sdata->rc_rateidx_mask[i] =
1920 sband ? (1 << sband->n_bitrates) - 1 : 0;
1925 memcpy(sdata->rc_rateidx_mcs_mask[i],
1926 sband->ht_cap.mcs.rx_mask,
1927 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1929 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1930 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1931 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1933 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1934 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1935 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1936 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1940 ieee80211_set_default_queues(sdata);
1942 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1943 sdata->user_power_level = local->user_power_level;
1945 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1947 /* setup type-dependent data */
1948 ieee80211_setup_sdata(sdata, type);
1951 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1952 if (type == NL80211_IFTYPE_STATION)
1953 sdata->u.mgd.use_4addr = params->use_4addr;
1955 ndev->features |= local->hw.netdev_features;
1956 ndev->hw_features |= ndev->features &
1957 MAC80211_SUPPORTED_FEATURES_TX;
1959 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1961 /* MTU range: 256 - 2304 */
1962 ndev->min_mtu = 256;
1963 ndev->max_mtu = local->hw.max_mtu;
1965 ret = register_netdevice(ndev);
1972 mutex_lock(&local->iflist_mtx);
1973 list_add_tail_rcu(&sdata->list, &local->interfaces);
1974 mutex_unlock(&local->iflist_mtx);
1977 *new_wdev = &sdata->wdev;
1982 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1986 mutex_lock(&sdata->local->iflist_mtx);
1987 list_del_rcu(&sdata->list);
1988 mutex_unlock(&sdata->local->iflist_mtx);
1991 ieee80211_txq_purge(sdata->local, to_txq_info(sdata->vif.txq));
1996 unregister_netdevice(sdata->dev);
1998 cfg80211_unregister_wdev(&sdata->wdev);
1999 ieee80211_teardown_sdata(sdata);
2004 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
2006 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
2008 ieee80211_do_stop(sdata, true);
2011 void ieee80211_remove_interfaces(struct ieee80211_local *local)
2013 struct ieee80211_sub_if_data *sdata, *tmp;
2014 LIST_HEAD(unreg_list);
2015 LIST_HEAD(wdev_list);
2019 /* Before destroying the interfaces, make sure they're all stopped so
2020 * that the hardware is stopped. Otherwise, the driver might still be
2021 * iterating the interfaces during the shutdown, e.g. from a worker
2022 * or from RX processing or similar, and if it does so (using atomic
2023 * iteration) while we're manipulating the list, the iteration will
2026 * After this, the hardware should be stopped and the driver should
2027 * have stopped all of its activities, so that we can do RCU-unaware
2028 * manipulations of the interface list below.
2030 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2032 WARN(local->open_count, "%s: open count remains %d\n",
2033 wiphy_name(local->hw.wiphy), local->open_count);
2035 ieee80211_txq_teardown_flows(local);
2037 mutex_lock(&local->iflist_mtx);
2038 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
2039 list_del(&sdata->list);
2042 unregister_netdevice_queue(sdata->dev, &unreg_list);
2044 list_add(&sdata->list, &wdev_list);
2046 mutex_unlock(&local->iflist_mtx);
2047 unregister_netdevice_many(&unreg_list);
2049 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
2050 list_del(&sdata->list);
2051 cfg80211_unregister_wdev(&sdata->wdev);
2056 static int netdev_notify(struct notifier_block *nb,
2057 unsigned long state, void *ptr)
2059 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2060 struct ieee80211_sub_if_data *sdata;
2062 if (state != NETDEV_CHANGENAME)
2065 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
2068 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
2071 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2072 memcpy(sdata->name, dev->name, IFNAMSIZ);
2073 ieee80211_debugfs_rename_netdev(sdata);
2078 static struct notifier_block mac80211_netdev_notifier = {
2079 .notifier_call = netdev_notify,
2082 int ieee80211_iface_init(void)
2084 return register_netdevice_notifier(&mac80211_netdev_notifier);
2087 void ieee80211_iface_exit(void)
2089 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2092 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2094 if (sdata->vif.type == NL80211_IFTYPE_AP)
2095 atomic_inc(&sdata->u.ap.num_mcast_sta);
2096 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2097 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2100 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2102 if (sdata->vif.type == NL80211_IFTYPE_AP)
2103 atomic_dec(&sdata->u.ap.num_mcast_sta);
2104 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2105 atomic_dec(&sdata->u.vlan.num_mcast_sta);