4 * Copyright 2002-2005, Instant802 Networks, Inc.
5 * Copyright 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
9 * Copyright (c) 2016 Intel Deutschland GmbH
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
15 #include <linux/slab.h>
16 #include <linux/kernel.h>
17 #include <linux/if_arp.h>
18 #include <linux/netdevice.h>
19 #include <linux/rtnetlink.h>
20 #include <net/mac80211.h>
21 #include <net/ieee80211_radiotap.h>
22 #include "ieee80211_i.h"
24 #include "debugfs_netdev.h"
27 #include "driver-ops.h"
32 * DOC: Interface list locking
34 * The interface list in each struct ieee80211_local is protected
37 * (1) modifications may only be done under the RTNL
38 * (2) modifications and readers are protected against each other by
40 * (3) modifications are done in an RCU manner so atomic readers
41 * can traverse the list in RCU-safe blocks.
43 * As a consequence, reads (traversals) of the list can be protected
44 * by either the RTNL, the iflist_mtx or RCU.
47 static void ieee80211_iface_work(struct work_struct *work);
49 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
51 struct ieee80211_chanctx_conf *chanctx_conf;
55 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
61 power = ieee80211_chandef_max_power(&chanctx_conf->def);
64 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
65 power = min(power, sdata->user_power_level);
67 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
68 power = min(power, sdata->ap_power_level);
70 if (power != sdata->vif.bss_conf.txpower) {
71 sdata->vif.bss_conf.txpower = power;
72 ieee80211_hw_config(sdata->local, 0);
79 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
82 if (__ieee80211_recalc_txpower(sdata) ||
83 (update_bss && ieee80211_sdata_running(sdata)))
84 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
87 static u32 __ieee80211_idle_off(struct ieee80211_local *local)
89 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
92 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
93 return IEEE80211_CONF_CHANGE_IDLE;
96 static u32 __ieee80211_idle_on(struct ieee80211_local *local)
98 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
101 ieee80211_flush_queues(local, NULL, false);
103 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
104 return IEEE80211_CONF_CHANGE_IDLE;
107 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
110 bool working, scanning, active;
111 unsigned int led_trig_start = 0, led_trig_stop = 0;
113 lockdep_assert_held(&local->mtx);
115 active = force_active ||
116 !list_empty(&local->chanctx_list) ||
119 working = !local->ops->remain_on_channel &&
120 !list_empty(&local->roc_list);
122 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
123 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
125 if (working || scanning)
126 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
128 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
131 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
133 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
135 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
137 if (working || scanning || active)
138 return __ieee80211_idle_off(local);
139 return __ieee80211_idle_on(local);
142 u32 ieee80211_idle_off(struct ieee80211_local *local)
144 return __ieee80211_recalc_idle(local, true);
147 void ieee80211_recalc_idle(struct ieee80211_local *local)
149 u32 change = __ieee80211_recalc_idle(local, false);
151 ieee80211_hw_config(local, change);
154 static int ieee80211_verify_mac(struct ieee80211_sub_if_data *sdata, u8 *addr,
157 struct ieee80211_local *local = sdata->local;
158 struct ieee80211_sub_if_data *iter;
163 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
167 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
168 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
169 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
171 m = local->hw.wiphy->addr_mask;
172 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
173 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
174 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
179 mutex_lock(&local->iflist_mtx);
180 list_for_each_entry(iter, &local->interfaces, list) {
184 if (iter->vif.type == NL80211_IFTYPE_MONITOR &&
185 !(iter->u.mntr.flags & MONITOR_FLAG_ACTIVE))
189 tmp = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
190 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
191 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
193 if ((new & ~mask) != (tmp & ~mask)) {
198 mutex_unlock(&local->iflist_mtx);
203 static int ieee80211_change_mac(struct net_device *dev, void *addr)
205 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
206 struct sockaddr *sa = addr;
207 bool check_dup = true;
210 if (ieee80211_sdata_running(sdata))
213 if (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
214 !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
217 ret = ieee80211_verify_mac(sdata, sa->sa_data, check_dup);
221 ret = eth_mac_addr(dev, sa);
224 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
229 static inline int identical_mac_addr_allowed(int type1, int type2)
231 return type1 == NL80211_IFTYPE_MONITOR ||
232 type2 == NL80211_IFTYPE_MONITOR ||
233 type1 == NL80211_IFTYPE_P2P_DEVICE ||
234 type2 == NL80211_IFTYPE_P2P_DEVICE ||
235 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
236 (type1 == NL80211_IFTYPE_WDS &&
237 (type2 == NL80211_IFTYPE_WDS ||
238 type2 == NL80211_IFTYPE_AP)) ||
239 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
240 (type1 == NL80211_IFTYPE_AP_VLAN &&
241 (type2 == NL80211_IFTYPE_AP ||
242 type2 == NL80211_IFTYPE_AP_VLAN));
245 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
246 enum nl80211_iftype iftype)
248 struct ieee80211_local *local = sdata->local;
249 struct ieee80211_sub_if_data *nsdata;
254 /* we hold the RTNL here so can safely walk the list */
255 list_for_each_entry(nsdata, &local->interfaces, list) {
256 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
258 * Only OCB and monitor mode may coexist
260 if ((sdata->vif.type == NL80211_IFTYPE_OCB &&
261 nsdata->vif.type != NL80211_IFTYPE_MONITOR) ||
262 (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
263 nsdata->vif.type == NL80211_IFTYPE_OCB))
267 * Allow only a single IBSS interface to be up at any
268 * time. This is restricted because beacon distribution
269 * cannot work properly if both are in the same IBSS.
271 * To remove this restriction we'd have to disallow them
272 * from setting the same SSID on different IBSS interfaces
273 * belonging to the same hardware. Then, however, we're
274 * faced with having to adopt two different TSF timers...
276 if (iftype == NL80211_IFTYPE_ADHOC &&
277 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
280 * will not add another interface while any channel
283 if (nsdata->vif.csa_active)
287 * The remaining checks are only performed for interfaces
288 * with the same MAC address.
290 if (!ether_addr_equal(sdata->vif.addr,
295 * check whether it may have the same address
297 if (!identical_mac_addr_allowed(iftype,
302 * can only add VLANs to enabled APs
304 if (iftype == NL80211_IFTYPE_AP_VLAN &&
305 nsdata->vif.type == NL80211_IFTYPE_AP)
306 sdata->bss = &nsdata->u.ap;
310 mutex_lock(&local->chanctx_mtx);
311 ret = ieee80211_check_combinations(sdata, NULL, 0, 0);
312 mutex_unlock(&local->chanctx_mtx);
316 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata,
317 enum nl80211_iftype iftype)
319 int n_queues = sdata->local->hw.queues;
322 if (iftype == NL80211_IFTYPE_NAN)
325 if (iftype != NL80211_IFTYPE_P2P_DEVICE) {
326 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
327 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
328 IEEE80211_INVAL_HW_QUEUE))
330 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
336 if ((iftype != NL80211_IFTYPE_AP &&
337 iftype != NL80211_IFTYPE_P2P_GO &&
338 iftype != NL80211_IFTYPE_MESH_POINT) ||
339 !ieee80211_hw_check(&sdata->local->hw, QUEUE_CONTROL)) {
340 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
344 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
347 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
353 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
356 struct ieee80211_local *local = sdata->local;
357 u32 flags = sdata->u.mntr.flags;
359 #define ADJUST(_f, _s) do { \
360 if (flags & MONITOR_FLAG_##_f) \
361 local->fif_##_s += offset; \
364 ADJUST(FCSFAIL, fcsfail);
365 ADJUST(PLCPFAIL, plcpfail);
366 ADJUST(CONTROL, control);
367 ADJUST(CONTROL, pspoll);
368 ADJUST(OTHER_BSS, other_bss);
373 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
375 struct ieee80211_local *local = sdata->local;
378 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
379 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
380 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
381 else if (local->hw.queues >= IEEE80211_NUM_ACS)
382 sdata->vif.hw_queue[i] = i;
384 sdata->vif.hw_queue[i] = 0;
386 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
389 int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
391 struct ieee80211_sub_if_data *sdata;
394 if (!ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF))
399 if (local->monitor_sdata)
402 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
407 sdata->local = local;
408 sdata->vif.type = NL80211_IFTYPE_MONITOR;
409 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
410 wiphy_name(local->hw.wiphy));
411 sdata->wdev.iftype = NL80211_IFTYPE_MONITOR;
413 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
415 ieee80211_set_default_queues(sdata);
417 ret = drv_add_interface(local, sdata);
419 /* ok .. stupid driver, it asked for this! */
424 ret = ieee80211_check_queues(sdata, NL80211_IFTYPE_MONITOR);
430 mutex_lock(&local->iflist_mtx);
431 rcu_assign_pointer(local->monitor_sdata, sdata);
432 mutex_unlock(&local->iflist_mtx);
434 mutex_lock(&local->mtx);
435 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
436 IEEE80211_CHANCTX_EXCLUSIVE);
437 mutex_unlock(&local->mtx);
439 mutex_lock(&local->iflist_mtx);
440 RCU_INIT_POINTER(local->monitor_sdata, NULL);
441 mutex_unlock(&local->iflist_mtx);
443 drv_remove_interface(local, sdata);
448 skb_queue_head_init(&sdata->skb_queue);
449 INIT_WORK(&sdata->work, ieee80211_iface_work);
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 case NL80211_IFTYPE_NAN:
544 /* no special treatment */
546 case NL80211_IFTYPE_UNSPECIFIED:
547 case NUM_NL80211_IFTYPES:
548 case NL80211_IFTYPE_P2P_CLIENT:
549 case NL80211_IFTYPE_P2P_GO:
555 if (local->open_count == 0) {
556 res = drv_start(local);
559 /* we're brought up, everything changes */
560 hw_reconf_flags = ~0;
561 ieee80211_led_radio(local, true);
562 ieee80211_mod_tpt_led_trig(local,
563 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
567 * Copy the hopefully now-present MAC address to
568 * this interface, if it has the special null one.
570 if (dev && is_zero_ether_addr(dev->dev_addr)) {
571 memcpy(dev->dev_addr,
572 local->hw.wiphy->perm_addr,
574 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
576 if (!is_valid_ether_addr(dev->dev_addr)) {
577 res = -EADDRNOTAVAIL;
582 switch (sdata->vif.type) {
583 case NL80211_IFTYPE_AP_VLAN:
584 /* no need to tell driver, but set carrier and chanctx */
585 if (rtnl_dereference(sdata->bss->beacon)) {
586 ieee80211_vif_vlan_copy_chanctx(sdata);
587 netif_carrier_on(dev);
589 netif_carrier_off(dev);
592 case NL80211_IFTYPE_MONITOR:
593 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
594 local->cooked_mntrs++;
598 if (sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE) {
599 res = drv_add_interface(local, sdata);
602 } else if (local->monitors == 0 && local->open_count == 0) {
603 res = ieee80211_add_virtual_monitor(local);
608 /* must be before the call to ieee80211_configure_filter */
610 if (local->monitors == 1) {
611 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
612 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
615 ieee80211_adjust_monitor_flags(sdata, 1);
616 ieee80211_configure_filter(local);
617 mutex_lock(&local->mtx);
618 ieee80211_recalc_idle(local);
619 mutex_unlock(&local->mtx);
621 netif_carrier_on(dev);
625 ieee80211_del_virtual_monitor(local);
627 res = drv_add_interface(local, sdata);
630 res = ieee80211_check_queues(sdata,
631 ieee80211_vif_type_p2p(&sdata->vif));
633 goto err_del_interface;
636 if (sdata->vif.type == NL80211_IFTYPE_AP) {
638 local->fif_probe_req++;
640 ieee80211_configure_filter(local);
641 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
642 local->fif_probe_req++;
645 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
646 sdata->vif.type != NL80211_IFTYPE_NAN)
647 changed |= ieee80211_reset_erp_info(sdata);
648 ieee80211_bss_info_change_notify(sdata, changed);
650 switch (sdata->vif.type) {
651 case NL80211_IFTYPE_STATION:
652 case NL80211_IFTYPE_ADHOC:
653 case NL80211_IFTYPE_AP:
654 case NL80211_IFTYPE_MESH_POINT:
655 case NL80211_IFTYPE_OCB:
656 netif_carrier_off(dev);
658 case NL80211_IFTYPE_WDS:
659 case NL80211_IFTYPE_P2P_DEVICE:
660 case NL80211_IFTYPE_NAN:
668 * Set default queue parameters so drivers don't
669 * need to initialise the hardware if the hardware
670 * doesn't start up with sane defaults.
671 * Enable QoS for anything but station interfaces.
673 ieee80211_set_wmm_default(sdata, true,
674 sdata->vif.type != NL80211_IFTYPE_STATION);
677 set_bit(SDATA_STATE_RUNNING, &sdata->state);
679 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
680 /* Create STA entry for the WDS peer */
681 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
685 goto err_del_interface;
688 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
689 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
690 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
692 res = sta_info_insert(sta);
694 /* STA has been freed */
695 goto err_del_interface;
698 rate_control_rate_init(sta);
699 netif_carrier_on(dev);
700 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
701 rcu_assign_pointer(local->p2p_sdata, sdata);
705 * set_multicast_list will be invoked by the networking core
706 * which will check whether any increments here were done in
707 * error and sync them down to the hardware as filter flags.
709 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
710 atomic_inc(&local->iff_allmultis);
716 ieee80211_hw_config(local, hw_reconf_flags);
718 ieee80211_recalc_ps(local);
720 if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
721 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
722 local->ops->wake_tx_queue) {
723 /* XXX: for AP_VLAN, actually track AP queues */
724 netif_tx_start_all_queues(dev);
727 int n_acs = IEEE80211_NUM_ACS;
730 if (local->hw.queues < IEEE80211_NUM_ACS)
733 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
734 if (sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE ||
735 (local->queue_stop_reasons[sdata->vif.cab_queue] == 0 &&
736 skb_queue_empty(&local->pending[sdata->vif.cab_queue]))) {
737 for (ac = 0; ac < n_acs; ac++) {
738 int ac_queue = sdata->vif.hw_queue[ac];
740 if (local->queue_stop_reasons[ac_queue] == 0 &&
741 skb_queue_empty(&local->pending[ac_queue]))
742 netif_start_subqueue(dev, ac);
745 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
750 drv_remove_interface(local, sdata);
752 if (!local->open_count)
756 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
757 mutex_lock(&local->mtx);
758 list_del(&sdata->u.vlan.list);
759 mutex_unlock(&local->mtx);
761 /* might already be clear but that doesn't matter */
762 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
766 static int ieee80211_open(struct net_device *dev)
768 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
771 /* fail early if user set an invalid address */
772 if (!is_valid_ether_addr(dev->dev_addr))
773 return -EADDRNOTAVAIL;
775 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
779 return ieee80211_do_open(&sdata->wdev, true);
782 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
785 struct ieee80211_local *local = sdata->local;
786 struct fq *fq = &local->fq;
788 struct sk_buff *skb, *tmp;
789 u32 hw_reconf_flags = 0;
792 struct cfg80211_chan_def chandef;
794 struct cfg80211_nan_func *func;
796 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
798 cancel_scan = rcu_access_pointer(local->scan_sdata) == sdata;
800 ieee80211_scan_cancel(local);
803 * Stop TX on this interface first.
806 netif_tx_stop_all_queues(sdata->dev);
808 ieee80211_roc_purge(local, sdata);
810 switch (sdata->vif.type) {
811 case NL80211_IFTYPE_STATION:
812 ieee80211_mgd_stop(sdata);
814 case NL80211_IFTYPE_ADHOC:
815 ieee80211_ibss_stop(sdata);
817 case NL80211_IFTYPE_AP:
818 cancel_work_sync(&sdata->u.ap.request_smps_work);
825 * Remove all stations associated with this interface.
827 * This must be done before calling ops->remove_interface()
828 * because otherwise we can later invoke ops->sta_notify()
829 * whenever the STAs are removed, and that invalidates driver
830 * assumptions about always getting a vif pointer that is valid
831 * (because if we remove a STA after ops->remove_interface()
832 * the driver will have removed the vif info already!)
834 * In WDS mode a station must exist here and be flushed, for
835 * AP_VLANs stations may exist since there's nothing else that
836 * would have removed them, but in other modes there shouldn't
839 flushed = sta_info_flush(sdata);
840 WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
841 ((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
842 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1)));
844 /* don't count this interface for allmulti while it is down */
845 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
846 atomic_dec(&local->iff_allmultis);
848 if (sdata->vif.type == NL80211_IFTYPE_AP) {
850 local->fif_probe_req--;
851 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
852 local->fif_probe_req--;
856 netif_addr_lock_bh(sdata->dev);
857 spin_lock_bh(&local->filter_lock);
858 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
859 sdata->dev->addr_len);
860 spin_unlock_bh(&local->filter_lock);
861 netif_addr_unlock_bh(sdata->dev);
864 del_timer_sync(&local->dynamic_ps_timer);
865 cancel_work_sync(&local->dynamic_ps_enable_work);
867 cancel_work_sync(&sdata->recalc_smps);
869 mutex_lock(&local->mtx);
870 sdata->vif.csa_active = false;
871 if (sdata->vif.type == NL80211_IFTYPE_STATION)
872 sdata->u.mgd.csa_waiting_bcn = false;
873 if (sdata->csa_block_tx) {
874 ieee80211_wake_vif_queues(local, sdata,
875 IEEE80211_QUEUE_STOP_REASON_CSA);
876 sdata->csa_block_tx = false;
878 mutex_unlock(&local->mtx);
881 cancel_work_sync(&sdata->csa_finalize_work);
883 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
885 if (sdata->wdev.cac_started) {
886 chandef = sdata->vif.bss_conf.chandef;
887 WARN_ON(local->suspended);
888 mutex_lock(&local->mtx);
889 ieee80211_vif_release_channel(sdata);
890 mutex_unlock(&local->mtx);
891 cfg80211_cac_event(sdata->dev, &chandef,
892 NL80211_RADAR_CAC_ABORTED,
896 /* APs need special treatment */
897 if (sdata->vif.type == NL80211_IFTYPE_AP) {
898 struct ieee80211_sub_if_data *vlan, *tmpsdata;
900 /* down all dependent devices, that is VLANs */
901 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
903 dev_close(vlan->dev);
904 WARN_ON(!list_empty(&sdata->u.ap.vlans));
905 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
906 /* remove all packets in parent bc_buf pointing to this dev */
907 ps = &sdata->bss->ps;
909 spin_lock_irqsave(&ps->bc_buf.lock, flags);
910 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
911 if (skb->dev == sdata->dev) {
912 __skb_unlink(skb, &ps->bc_buf);
913 local->total_ps_buffered--;
914 ieee80211_free_txskb(&local->hw, skb);
917 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
923 switch (sdata->vif.type) {
924 case NL80211_IFTYPE_AP_VLAN:
925 mutex_lock(&local->mtx);
926 list_del(&sdata->u.vlan.list);
927 mutex_unlock(&local->mtx);
928 RCU_INIT_POINTER(sdata->vif.chanctx_conf, NULL);
929 /* see comment in the default case below */
930 ieee80211_free_keys(sdata, true);
931 /* no need to tell driver */
933 case NL80211_IFTYPE_MONITOR:
934 if (sdata->u.mntr.flags & MONITOR_FLAG_COOK_FRAMES) {
935 local->cooked_mntrs--;
940 if (local->monitors == 0) {
941 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
942 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
945 ieee80211_adjust_monitor_flags(sdata, -1);
947 case NL80211_IFTYPE_NAN:
948 /* clean all the functions */
949 spin_lock_bh(&sdata->u.nan.func_lock);
951 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, i) {
952 idr_remove(&sdata->u.nan.function_inst_ids, i);
953 cfg80211_free_nan_func(func);
955 idr_destroy(&sdata->u.nan.function_inst_ids);
957 spin_unlock_bh(&sdata->u.nan.func_lock);
959 case NL80211_IFTYPE_P2P_DEVICE:
960 /* relies on synchronize_rcu() below */
961 RCU_INIT_POINTER(local->p2p_sdata, NULL);
964 cancel_work_sync(&sdata->work);
966 * When we get here, the interface is marked down.
967 * Free the remaining keys, if there are any
968 * (which can happen in AP mode if userspace sets
969 * keys before the interface is operating, and maybe
972 * Force the key freeing to always synchronize_net()
973 * to wait for the RX path in case it is using this
974 * interface enqueuing frames at this very time on
977 ieee80211_free_keys(sdata, true);
978 skb_queue_purge(&sdata->skb_queue);
983 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
984 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
985 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
986 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
987 if (info->control.vif == &sdata->vif) {
988 __skb_unlink(skb, &local->pending[i]);
989 ieee80211_free_txskb(&local->hw, skb);
993 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
995 if (sdata->vif.txq) {
996 struct txq_info *txqi = to_txq_info(sdata->vif.txq);
998 spin_lock_bh(&fq->lock);
999 ieee80211_txq_purge(local, txqi);
1000 spin_unlock_bh(&fq->lock);
1003 if (local->open_count == 0)
1004 ieee80211_clear_tx_pending(local);
1007 * If the interface goes down while suspended, presumably because
1008 * the device was unplugged and that happens before our resume,
1009 * then the driver is already unconfigured and the remainder of
1010 * this function isn't needed.
1011 * XXX: what about WoWLAN? If the device has software state, e.g.
1012 * memory allocated, it might expect teardown commands from
1015 if (local->suspended) {
1016 WARN_ON(local->wowlan);
1017 WARN_ON(rtnl_dereference(local->monitor_sdata));
1021 switch (sdata->vif.type) {
1022 case NL80211_IFTYPE_AP_VLAN:
1024 case NL80211_IFTYPE_MONITOR:
1025 if (local->monitors == 0)
1026 ieee80211_del_virtual_monitor(local);
1028 mutex_lock(&local->mtx);
1029 ieee80211_recalc_idle(local);
1030 mutex_unlock(&local->mtx);
1032 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
1038 drv_remove_interface(local, sdata);
1041 ieee80211_recalc_ps(local);
1044 flush_delayed_work(&local->scan_work);
1046 if (local->open_count == 0) {
1047 ieee80211_stop_device(local);
1049 /* no reconfiguring after stop! */
1053 /* do after stop to avoid reconfiguring when we stop anyway */
1054 ieee80211_configure_filter(local);
1055 ieee80211_hw_config(local, hw_reconf_flags);
1057 if (local->monitors == local->open_count)
1058 ieee80211_add_virtual_monitor(local);
1061 static int ieee80211_stop(struct net_device *dev)
1063 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1065 ieee80211_do_stop(sdata, true);
1070 static void ieee80211_set_multicast_list(struct net_device *dev)
1072 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1073 struct ieee80211_local *local = sdata->local;
1074 int allmulti, sdata_allmulti;
1076 allmulti = !!(dev->flags & IFF_ALLMULTI);
1077 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
1079 if (allmulti != sdata_allmulti) {
1080 if (dev->flags & IFF_ALLMULTI)
1081 atomic_inc(&local->iff_allmultis);
1083 atomic_dec(&local->iff_allmultis);
1084 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
1087 spin_lock_bh(&local->filter_lock);
1088 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
1089 spin_unlock_bh(&local->filter_lock);
1090 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
1094 * Called when the netdev is removed or, by the code below, before
1095 * the interface type changes.
1097 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
1101 /* free extra data */
1102 ieee80211_free_keys(sdata, false);
1104 ieee80211_debugfs_remove_netdev(sdata);
1106 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1107 __skb_queue_purge(&sdata->fragments[i].skb_list);
1108 sdata->fragment_next = 0;
1110 if (ieee80211_vif_is_mesh(&sdata->vif))
1111 ieee80211_mesh_teardown_sdata(sdata);
1114 static void ieee80211_uninit(struct net_device *dev)
1116 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
1119 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
1120 struct sk_buff *skb,
1122 select_queue_fallback_t fallback)
1124 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
1128 ieee80211_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
1132 for_each_possible_cpu(i) {
1133 const struct pcpu_sw_netstats *tstats;
1134 u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
1137 tstats = per_cpu_ptr(dev->tstats, i);
1140 start = u64_stats_fetch_begin_irq(&tstats->syncp);
1141 rx_packets = tstats->rx_packets;
1142 tx_packets = tstats->tx_packets;
1143 rx_bytes = tstats->rx_bytes;
1144 tx_bytes = tstats->tx_bytes;
1145 } while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
1147 stats->rx_packets += rx_packets;
1148 stats->tx_packets += tx_packets;
1149 stats->rx_bytes += rx_bytes;
1150 stats->tx_bytes += tx_bytes;
1154 static const struct net_device_ops ieee80211_dataif_ops = {
1155 .ndo_open = ieee80211_open,
1156 .ndo_stop = ieee80211_stop,
1157 .ndo_uninit = ieee80211_uninit,
1158 .ndo_start_xmit = ieee80211_subif_start_xmit,
1159 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1160 .ndo_set_mac_address = ieee80211_change_mac,
1161 .ndo_select_queue = ieee80211_netdev_select_queue,
1162 .ndo_get_stats64 = ieee80211_get_stats64,
1165 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
1166 struct sk_buff *skb,
1168 select_queue_fallback_t fallback)
1170 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1171 struct ieee80211_local *local = sdata->local;
1172 struct ieee80211_hdr *hdr;
1173 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
1175 if (local->hw.queues < IEEE80211_NUM_ACS)
1179 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
1180 return 0; /* doesn't matter, frame will be dropped */
1182 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
1184 return ieee80211_select_queue_80211(sdata, skb, hdr);
1187 static const struct net_device_ops ieee80211_monitorif_ops = {
1188 .ndo_open = ieee80211_open,
1189 .ndo_stop = ieee80211_stop,
1190 .ndo_uninit = ieee80211_uninit,
1191 .ndo_start_xmit = ieee80211_monitor_start_xmit,
1192 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1193 .ndo_set_mac_address = ieee80211_change_mac,
1194 .ndo_select_queue = ieee80211_monitor_select_queue,
1195 .ndo_get_stats64 = ieee80211_get_stats64,
1198 static void ieee80211_if_free(struct net_device *dev)
1200 free_percpu(dev->tstats);
1204 static void ieee80211_if_setup(struct net_device *dev)
1207 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1208 dev->netdev_ops = &ieee80211_dataif_ops;
1209 dev->destructor = ieee80211_if_free;
1212 static void ieee80211_if_setup_no_queue(struct net_device *dev)
1214 ieee80211_if_setup(dev);
1215 dev->priv_flags |= IFF_NO_QUEUE;
1218 static void ieee80211_iface_work(struct work_struct *work)
1220 struct ieee80211_sub_if_data *sdata =
1221 container_of(work, struct ieee80211_sub_if_data, work);
1222 struct ieee80211_local *local = sdata->local;
1223 struct sk_buff *skb;
1224 struct sta_info *sta;
1225 struct ieee80211_ra_tid *ra_tid;
1226 struct ieee80211_rx_agg *rx_agg;
1228 if (!ieee80211_sdata_running(sdata))
1231 if (test_bit(SCAN_SW_SCANNING, &local->scanning))
1234 if (!ieee80211_can_run_worker(local))
1237 /* first process frames */
1238 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1239 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1241 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1242 ra_tid = (void *)&skb->cb;
1243 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1245 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1246 ra_tid = (void *)&skb->cb;
1247 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1249 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_START) {
1250 rx_agg = (void *)&skb->cb;
1251 mutex_lock(&local->sta_mtx);
1252 sta = sta_info_get_bss(sdata, rx_agg->addr);
1254 __ieee80211_start_rx_ba_session(sta,
1255 0, 0, 0, 1, rx_agg->tid,
1256 IEEE80211_MAX_AMPDU_BUF,
1258 mutex_unlock(&local->sta_mtx);
1259 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_RX_AGG_STOP) {
1260 rx_agg = (void *)&skb->cb;
1261 mutex_lock(&local->sta_mtx);
1262 sta = sta_info_get_bss(sdata, rx_agg->addr);
1264 __ieee80211_stop_rx_ba_session(sta,
1266 WLAN_BACK_RECIPIENT, 0,
1268 mutex_unlock(&local->sta_mtx);
1269 } else if (ieee80211_is_action(mgmt->frame_control) &&
1270 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1273 mutex_lock(&local->sta_mtx);
1274 sta = sta_info_get_bss(sdata, mgmt->sa);
1276 switch (mgmt->u.action.u.addba_req.action_code) {
1277 case WLAN_ACTION_ADDBA_REQ:
1278 ieee80211_process_addba_request(
1279 local, sta, mgmt, len);
1281 case WLAN_ACTION_ADDBA_RESP:
1282 ieee80211_process_addba_resp(local, sta,
1285 case WLAN_ACTION_DELBA:
1286 ieee80211_process_delba(sdata, sta,
1294 mutex_unlock(&local->sta_mtx);
1295 } else if (ieee80211_is_action(mgmt->frame_control) &&
1296 mgmt->u.action.category == WLAN_CATEGORY_VHT) {
1297 switch (mgmt->u.action.u.vht_group_notif.action_code) {
1298 case WLAN_VHT_ACTION_OPMODE_NOTIF: {
1299 struct ieee80211_rx_status *status;
1300 enum nl80211_band band;
1303 status = IEEE80211_SKB_RXCB(skb);
1304 band = status->band;
1305 opmode = mgmt->u.action.u.vht_opmode_notif.operating_mode;
1307 mutex_lock(&local->sta_mtx);
1308 sta = sta_info_get_bss(sdata, mgmt->sa);
1311 ieee80211_vht_handle_opmode(sdata, sta,
1315 mutex_unlock(&local->sta_mtx);
1318 case WLAN_VHT_ACTION_GROUPID_MGMT:
1319 ieee80211_process_mu_groups(sdata, mgmt);
1325 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1326 struct ieee80211_hdr *hdr = (void *)mgmt;
1328 * So the frame isn't mgmt, but frame_control
1329 * is at the right place anyway, of course, so
1330 * the if statement is correct.
1332 * Warn if we have other data frame types here,
1333 * they must not get here.
1335 WARN_ON(hdr->frame_control &
1336 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1337 WARN_ON(!(hdr->seq_ctrl &
1338 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1340 * This was a fragment of a frame, received while
1341 * a block-ack session was active. That cannot be
1342 * right, so terminate the session.
1344 mutex_lock(&local->sta_mtx);
1345 sta = sta_info_get_bss(sdata, mgmt->sa);
1347 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1348 IEEE80211_QOS_CTL_TID_MASK;
1350 __ieee80211_stop_rx_ba_session(
1351 sta, tid, WLAN_BACK_RECIPIENT,
1352 WLAN_REASON_QSTA_REQUIRE_SETUP,
1355 mutex_unlock(&local->sta_mtx);
1356 } else switch (sdata->vif.type) {
1357 case NL80211_IFTYPE_STATION:
1358 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1360 case NL80211_IFTYPE_ADHOC:
1361 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1363 case NL80211_IFTYPE_MESH_POINT:
1364 if (!ieee80211_vif_is_mesh(&sdata->vif))
1366 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1369 WARN(1, "frame for unexpected interface type");
1376 /* then other type-dependent work */
1377 switch (sdata->vif.type) {
1378 case NL80211_IFTYPE_STATION:
1379 ieee80211_sta_work(sdata);
1381 case NL80211_IFTYPE_ADHOC:
1382 ieee80211_ibss_work(sdata);
1384 case NL80211_IFTYPE_MESH_POINT:
1385 if (!ieee80211_vif_is_mesh(&sdata->vif))
1387 ieee80211_mesh_work(sdata);
1389 case NL80211_IFTYPE_OCB:
1390 ieee80211_ocb_work(sdata);
1397 static void ieee80211_recalc_smps_work(struct work_struct *work)
1399 struct ieee80211_sub_if_data *sdata =
1400 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1402 ieee80211_recalc_smps(sdata);
1406 * Helper function to initialise an interface to a specific type.
1408 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1409 enum nl80211_iftype type)
1411 static const u8 bssid_wildcard[ETH_ALEN] = {0xff, 0xff, 0xff,
1414 /* clear type-dependent union */
1415 memset(&sdata->u, 0, sizeof(sdata->u));
1417 /* and set some type-dependent values */
1418 sdata->vif.type = type;
1419 sdata->vif.p2p = false;
1420 sdata->wdev.iftype = type;
1422 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1423 sdata->control_port_no_encrypt = false;
1424 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1425 sdata->vif.bss_conf.idle = true;
1427 sdata->noack_map = 0;
1429 /* only monitor/p2p-device differ */
1431 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1432 sdata->dev->type = ARPHRD_ETHER;
1435 skb_queue_head_init(&sdata->skb_queue);
1436 INIT_WORK(&sdata->work, ieee80211_iface_work);
1437 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1438 INIT_WORK(&sdata->csa_finalize_work, ieee80211_csa_finalize_work);
1439 INIT_LIST_HEAD(&sdata->assigned_chanctx_list);
1440 INIT_LIST_HEAD(&sdata->reserved_chanctx_list);
1443 case NL80211_IFTYPE_P2P_GO:
1444 type = NL80211_IFTYPE_AP;
1445 sdata->vif.type = type;
1446 sdata->vif.p2p = true;
1448 case NL80211_IFTYPE_AP:
1449 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1450 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1451 INIT_WORK(&sdata->u.ap.request_smps_work,
1452 ieee80211_request_smps_ap_work);
1453 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1454 sdata->u.ap.req_smps = IEEE80211_SMPS_OFF;
1456 case NL80211_IFTYPE_P2P_CLIENT:
1457 type = NL80211_IFTYPE_STATION;
1458 sdata->vif.type = type;
1459 sdata->vif.p2p = true;
1461 case NL80211_IFTYPE_STATION:
1462 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1463 ieee80211_sta_setup_sdata(sdata);
1465 case NL80211_IFTYPE_OCB:
1466 sdata->vif.bss_conf.bssid = bssid_wildcard;
1467 ieee80211_ocb_setup_sdata(sdata);
1469 case NL80211_IFTYPE_ADHOC:
1470 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1471 ieee80211_ibss_setup_sdata(sdata);
1473 case NL80211_IFTYPE_MESH_POINT:
1474 if (ieee80211_vif_is_mesh(&sdata->vif))
1475 ieee80211_mesh_init_sdata(sdata);
1477 case NL80211_IFTYPE_MONITOR:
1478 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1479 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1480 sdata->u.mntr.flags = MONITOR_FLAG_CONTROL |
1481 MONITOR_FLAG_OTHER_BSS;
1483 case NL80211_IFTYPE_WDS:
1484 sdata->vif.bss_conf.bssid = NULL;
1486 case NL80211_IFTYPE_NAN:
1487 idr_init(&sdata->u.nan.function_inst_ids);
1488 spin_lock_init(&sdata->u.nan.func_lock);
1489 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1491 case NL80211_IFTYPE_AP_VLAN:
1492 case NL80211_IFTYPE_P2P_DEVICE:
1493 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1495 case NL80211_IFTYPE_UNSPECIFIED:
1496 case NUM_NL80211_IFTYPES:
1501 ieee80211_debugfs_add_netdev(sdata);
1504 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1505 enum nl80211_iftype type)
1507 struct ieee80211_local *local = sdata->local;
1509 enum nl80211_iftype internal_type = type;
1514 if (!local->ops->change_interface)
1517 switch (sdata->vif.type) {
1518 case NL80211_IFTYPE_AP:
1519 case NL80211_IFTYPE_STATION:
1520 case NL80211_IFTYPE_ADHOC:
1521 case NL80211_IFTYPE_OCB:
1523 * Could maybe also all others here?
1524 * Just not sure how that interacts
1525 * with the RX/config path e.g. for
1534 case NL80211_IFTYPE_AP:
1535 case NL80211_IFTYPE_STATION:
1536 case NL80211_IFTYPE_ADHOC:
1537 case NL80211_IFTYPE_OCB:
1539 * Could probably support everything
1540 * but WDS here (WDS do_open can fail
1541 * under memory pressure, which this
1542 * code isn't prepared to handle).
1545 case NL80211_IFTYPE_P2P_CLIENT:
1547 internal_type = NL80211_IFTYPE_STATION;
1549 case NL80211_IFTYPE_P2P_GO:
1551 internal_type = NL80211_IFTYPE_AP;
1557 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1561 ieee80211_do_stop(sdata, false);
1563 ieee80211_teardown_sdata(sdata);
1565 ret = drv_change_interface(local, sdata, internal_type, p2p);
1567 type = ieee80211_vif_type_p2p(&sdata->vif);
1570 * Ignore return value here, there's not much we can do since
1571 * the driver changed the interface type internally already.
1572 * The warnings will hopefully make driver authors fix it :-)
1574 ieee80211_check_queues(sdata, type);
1576 ieee80211_setup_sdata(sdata, type);
1578 err = ieee80211_do_open(&sdata->wdev, false);
1579 WARN(err, "type change: do_open returned %d", err);
1584 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1585 enum nl80211_iftype type)
1591 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1594 if (ieee80211_sdata_running(sdata)) {
1595 ret = ieee80211_runtime_change_iftype(sdata, type);
1599 /* Purge and reset type-dependent state. */
1600 ieee80211_teardown_sdata(sdata);
1601 ieee80211_setup_sdata(sdata, type);
1604 /* reset some values that shouldn't be kept across type changes */
1605 if (type == NL80211_IFTYPE_STATION)
1606 sdata->u.mgd.use_4addr = false;
1611 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1612 u8 *perm_addr, enum nl80211_iftype type)
1614 struct ieee80211_sub_if_data *sdata;
1615 u64 mask, start, addr, val, inc;
1617 u8 tmp_addr[ETH_ALEN];
1620 /* default ... something at least */
1621 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1623 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1624 local->hw.wiphy->n_addresses <= 1)
1627 mutex_lock(&local->iflist_mtx);
1630 case NL80211_IFTYPE_MONITOR:
1631 /* doesn't matter */
1633 case NL80211_IFTYPE_WDS:
1634 case NL80211_IFTYPE_AP_VLAN:
1635 /* match up with an AP interface */
1636 list_for_each_entry(sdata, &local->interfaces, list) {
1637 if (sdata->vif.type != NL80211_IFTYPE_AP)
1639 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1642 /* keep default if no AP interface present */
1644 case NL80211_IFTYPE_P2P_CLIENT:
1645 case NL80211_IFTYPE_P2P_GO:
1646 if (ieee80211_hw_check(&local->hw, P2P_DEV_ADDR_FOR_INTF)) {
1647 list_for_each_entry(sdata, &local->interfaces, list) {
1648 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1650 if (!ieee80211_sdata_running(sdata))
1652 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1656 /* otherwise fall through */
1658 /* assign a new address if possible -- try n_addresses first */
1659 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1662 list_for_each_entry(sdata, &local->interfaces, list) {
1663 if (ether_addr_equal(local->hw.wiphy->addresses[i].addr,
1672 local->hw.wiphy->addresses[i].addr,
1678 /* try mask if available */
1679 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1682 m = local->hw.wiphy->addr_mask;
1683 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1684 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1685 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1687 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1688 /* not a contiguous mask ... not handled now! */
1689 pr_info("not contiguous\n");
1694 * Pick address of existing interface in case user changed
1695 * MAC address manually, default to perm_addr.
1697 m = local->hw.wiphy->perm_addr;
1698 list_for_each_entry(sdata, &local->interfaces, list) {
1699 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
1701 m = sdata->vif.addr;
1704 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1705 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1706 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1708 inc = 1ULL<<__ffs64(mask);
1709 val = (start & mask);
1710 addr = (start & ~mask) | (val & mask);
1714 tmp_addr[5] = addr >> 0*8;
1715 tmp_addr[4] = addr >> 1*8;
1716 tmp_addr[3] = addr >> 2*8;
1717 tmp_addr[2] = addr >> 3*8;
1718 tmp_addr[1] = addr >> 4*8;
1719 tmp_addr[0] = addr >> 5*8;
1723 list_for_each_entry(sdata, &local->interfaces, list) {
1724 if (ether_addr_equal(tmp_addr, sdata->vif.addr)) {
1731 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1734 addr = (start & ~mask) | (val & mask);
1735 } while (addr != start);
1741 mutex_unlock(&local->iflist_mtx);
1744 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1745 unsigned char name_assign_type,
1746 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1747 struct vif_params *params)
1749 struct net_device *ndev = NULL;
1750 struct ieee80211_sub_if_data *sdata = NULL;
1751 struct txq_info *txqi;
1752 void (*if_setup)(struct net_device *dev);
1758 if (type == NL80211_IFTYPE_P2P_DEVICE || type == NL80211_IFTYPE_NAN) {
1759 struct wireless_dev *wdev;
1761 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1765 wdev = &sdata->wdev;
1768 strlcpy(sdata->name, name, IFNAMSIZ);
1769 ieee80211_assign_perm_addr(local, wdev->address, type);
1770 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1772 int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
1776 if (local->ops->wake_tx_queue)
1777 txq_size += sizeof(struct txq_info) +
1778 local->hw.txq_data_size;
1780 if (local->ops->wake_tx_queue)
1781 if_setup = ieee80211_if_setup_no_queue;
1783 if_setup = ieee80211_if_setup;
1785 if (local->hw.queues >= IEEE80211_NUM_ACS)
1786 txqs = IEEE80211_NUM_ACS;
1788 ndev = alloc_netdev_mqs(size + txq_size,
1789 name, name_assign_type,
1793 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1795 ndev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
1796 if (!ndev->tstats) {
1801 ndev->needed_headroom = local->tx_headroom +
1802 4*6 /* four MAC addresses */
1803 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1805 + 8 /* rfc1042/bridge tunnel */
1806 - ETH_HLEN /* ethernet hard_header_len */
1807 + IEEE80211_ENCRYPT_HEADROOM;
1808 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1810 ret = dev_alloc_name(ndev, ndev->name);
1812 ieee80211_if_free(ndev);
1816 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1817 if (params && is_valid_ether_addr(params->macaddr))
1818 memcpy(ndev->dev_addr, params->macaddr, ETH_ALEN);
1820 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1821 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1823 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1824 sdata = netdev_priv(ndev);
1825 ndev->ieee80211_ptr = &sdata->wdev;
1826 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1827 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1830 txqi = netdev_priv(ndev) + size;
1831 ieee80211_txq_init(sdata, NULL, txqi, 0);
1837 /* initialise type-independent data */
1838 sdata->wdev.wiphy = local->hw.wiphy;
1839 sdata->local = local;
1841 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1842 skb_queue_head_init(&sdata->fragments[i].skb_list);
1844 INIT_LIST_HEAD(&sdata->key_list);
1846 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1847 ieee80211_dfs_cac_timer_work);
1848 INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
1849 ieee80211_delayed_tailroom_dec);
1851 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1852 struct ieee80211_supported_band *sband;
1853 sband = local->hw.wiphy->bands[i];
1854 sdata->rc_rateidx_mask[i] =
1855 sband ? (1 << sband->n_bitrates) - 1 : 0;
1860 memcpy(sdata->rc_rateidx_mcs_mask[i],
1861 sband->ht_cap.mcs.rx_mask,
1862 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1864 cap = sband->vht_cap.vht_mcs.rx_mcs_map;
1865 vht_rate_mask = sdata->rc_rateidx_vht_mcs_mask[i];
1866 ieee80211_get_vht_mask_from_cap(cap, vht_rate_mask);
1868 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1869 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1870 memset(sdata->rc_rateidx_vht_mcs_mask[i], 0,
1871 sizeof(sdata->rc_rateidx_vht_mcs_mask[i]));
1875 ieee80211_set_default_queues(sdata);
1877 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1878 sdata->user_power_level = local->user_power_level;
1880 sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
1882 /* setup type-dependent data */
1883 ieee80211_setup_sdata(sdata, type);
1887 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1888 if (type == NL80211_IFTYPE_STATION)
1889 sdata->u.mgd.use_4addr = params->use_4addr;
1892 ndev->features |= local->hw.netdev_features;
1894 netdev_set_default_ethtool_ops(ndev, &ieee80211_ethtool_ops);
1896 /* MTU range: 256 - 2304 */
1897 ndev->min_mtu = 256;
1898 ndev->max_mtu = IEEE80211_MAX_DATA_LEN;
1900 ret = register_netdevice(ndev);
1902 ieee80211_if_free(ndev);
1907 mutex_lock(&local->iflist_mtx);
1908 list_add_tail_rcu(&sdata->list, &local->interfaces);
1909 mutex_unlock(&local->iflist_mtx);
1912 *new_wdev = &sdata->wdev;
1917 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1921 mutex_lock(&sdata->local->iflist_mtx);
1922 list_del_rcu(&sdata->list);
1923 mutex_unlock(&sdata->local->iflist_mtx);
1928 unregister_netdevice(sdata->dev);
1930 cfg80211_unregister_wdev(&sdata->wdev);
1931 ieee80211_teardown_sdata(sdata);
1936 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1938 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1940 ieee80211_do_stop(sdata, true);
1943 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1945 struct ieee80211_sub_if_data *sdata, *tmp;
1946 LIST_HEAD(unreg_list);
1947 LIST_HEAD(wdev_list);
1951 /* Before destroying the interfaces, make sure they're all stopped so
1952 * that the hardware is stopped. Otherwise, the driver might still be
1953 * iterating the interfaces during the shutdown, e.g. from a worker
1954 * or from RX processing or similar, and if it does so (using atomic
1955 * iteration) while we're manipulating the list, the iteration will
1958 * After this, the hardware should be stopped and the driver should
1959 * have stopped all of its activities, so that we can do RCU-unaware
1960 * manipulations of the interface list below.
1962 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1964 WARN(local->open_count, "%s: open count remains %d\n",
1965 wiphy_name(local->hw.wiphy), local->open_count);
1967 mutex_lock(&local->iflist_mtx);
1968 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1969 list_del(&sdata->list);
1972 unregister_netdevice_queue(sdata->dev, &unreg_list);
1974 list_add(&sdata->list, &wdev_list);
1976 mutex_unlock(&local->iflist_mtx);
1977 unregister_netdevice_many(&unreg_list);
1979 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1980 list_del(&sdata->list);
1981 cfg80211_unregister_wdev(&sdata->wdev);
1986 static int netdev_notify(struct notifier_block *nb,
1987 unsigned long state, void *ptr)
1989 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
1990 struct ieee80211_sub_if_data *sdata;
1992 if (state != NETDEV_CHANGENAME)
1995 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1998 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
2001 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
2002 memcpy(sdata->name, dev->name, IFNAMSIZ);
2003 ieee80211_debugfs_rename_netdev(sdata);
2008 static struct notifier_block mac80211_netdev_notifier = {
2009 .notifier_call = netdev_notify,
2012 int ieee80211_iface_init(void)
2014 return register_netdevice_notifier(&mac80211_netdev_notifier);
2017 void ieee80211_iface_exit(void)
2019 unregister_netdevice_notifier(&mac80211_netdev_notifier);
2022 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata)
2024 if (sdata->vif.type == NL80211_IFTYPE_AP)
2025 atomic_inc(&sdata->u.ap.num_mcast_sta);
2026 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2027 atomic_inc(&sdata->u.vlan.num_mcast_sta);
2030 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata)
2032 if (sdata->vif.type == NL80211_IFTYPE_AP)
2033 atomic_dec(&sdata->u.ap.num_mcast_sta);
2034 else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
2035 atomic_dec(&sdata->u.vlan.num_mcast_sta);