2 * Interface handling (except master interface)
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>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
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 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
47 struct ieee80211_chanctx_conf *chanctx_conf;
51 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
57 power = chanctx_conf->def.chan->max_power;
60 if (sdata->user_power_level != IEEE80211_UNSET_POWER_LEVEL)
61 power = min(power, sdata->user_power_level);
63 if (sdata->ap_power_level != IEEE80211_UNSET_POWER_LEVEL)
64 power = min(power, sdata->ap_power_level);
66 if (power != sdata->vif.bss_conf.txpower) {
67 sdata->vif.bss_conf.txpower = power;
68 ieee80211_hw_config(sdata->local, 0);
75 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata)
77 if (__ieee80211_recalc_txpower(sdata))
78 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER);
81 static u32 __ieee80211_idle_off(struct ieee80211_local *local)
83 if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE))
86 local->hw.conf.flags &= ~IEEE80211_CONF_IDLE;
87 return IEEE80211_CONF_CHANGE_IDLE;
90 static u32 __ieee80211_idle_on(struct ieee80211_local *local)
92 if (local->hw.conf.flags & IEEE80211_CONF_IDLE)
95 drv_flush(local, false);
97 local->hw.conf.flags |= IEEE80211_CONF_IDLE;
98 return IEEE80211_CONF_CHANGE_IDLE;
101 static u32 __ieee80211_recalc_idle(struct ieee80211_local *local,
104 bool working = false, scanning, active;
105 unsigned int led_trig_start = 0, led_trig_stop = 0;
106 struct ieee80211_roc_work *roc;
108 lockdep_assert_held(&local->mtx);
110 active = force_active ||
111 !list_empty(&local->chanctx_list) ||
114 if (!local->ops->remain_on_channel) {
115 list_for_each_entry(roc, &local->roc_list, list) {
121 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
122 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
124 if (working || scanning)
125 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
127 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
130 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
132 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
134 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
136 if (working || scanning || active)
137 return __ieee80211_idle_off(local);
138 return __ieee80211_idle_on(local);
141 u32 ieee80211_idle_off(struct ieee80211_local *local)
143 return __ieee80211_recalc_idle(local, true);
146 void ieee80211_recalc_idle(struct ieee80211_local *local)
148 u32 change = __ieee80211_recalc_idle(local, false);
150 ieee80211_hw_config(local, change);
153 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
155 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
162 static int ieee80211_verify_mac(struct ieee80211_local *local, u8 *addr)
164 struct ieee80211_sub_if_data *sdata;
169 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
173 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
174 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
175 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
177 m = local->hw.wiphy->addr_mask;
178 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
179 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
180 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
183 mutex_lock(&local->iflist_mtx);
184 list_for_each_entry(sdata, &local->interfaces, list) {
185 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
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;
209 if (ieee80211_sdata_running(sdata))
212 ret = ieee80211_verify_mac(sdata->local, sa->sa_data);
216 ret = eth_mac_addr(dev, sa);
219 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
224 static inline int identical_mac_addr_allowed(int type1, int type2)
226 return type1 == NL80211_IFTYPE_MONITOR ||
227 type2 == NL80211_IFTYPE_MONITOR ||
228 type1 == NL80211_IFTYPE_P2P_DEVICE ||
229 type2 == NL80211_IFTYPE_P2P_DEVICE ||
230 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
231 (type1 == NL80211_IFTYPE_WDS &&
232 (type2 == NL80211_IFTYPE_WDS ||
233 type2 == NL80211_IFTYPE_AP)) ||
234 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
235 (type1 == NL80211_IFTYPE_AP_VLAN &&
236 (type2 == NL80211_IFTYPE_AP ||
237 type2 == NL80211_IFTYPE_AP_VLAN));
240 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
241 enum nl80211_iftype iftype)
243 struct ieee80211_local *local = sdata->local;
244 struct ieee80211_sub_if_data *nsdata;
248 /* we hold the RTNL here so can safely walk the list */
249 list_for_each_entry(nsdata, &local->interfaces, list) {
250 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
252 * Allow only a single IBSS interface to be up at any
253 * time. This is restricted because beacon distribution
254 * cannot work properly if both are in the same IBSS.
256 * To remove this restriction we'd have to disallow them
257 * from setting the same SSID on different IBSS interfaces
258 * belonging to the same hardware. Then, however, we're
259 * faced with having to adopt two different TSF timers...
261 if (iftype == NL80211_IFTYPE_ADHOC &&
262 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
266 * The remaining checks are only performed for interfaces
267 * with the same MAC address.
269 if (!ether_addr_equal(sdata->vif.addr,
274 * check whether it may have the same address
276 if (!identical_mac_addr_allowed(iftype,
281 * can only add VLANs to enabled APs
283 if (iftype == NL80211_IFTYPE_AP_VLAN &&
284 nsdata->vif.type == NL80211_IFTYPE_AP)
285 sdata->bss = &nsdata->u.ap;
292 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata)
294 int n_queues = sdata->local->hw.queues;
297 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
298 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
299 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
300 IEEE80211_INVAL_HW_QUEUE))
302 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
308 if ((sdata->vif.type != NL80211_IFTYPE_AP &&
309 sdata->vif.type != NL80211_IFTYPE_MESH_POINT) ||
310 !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
311 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
315 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
318 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
324 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
327 struct ieee80211_local *local = sdata->local;
328 u32 flags = sdata->u.mntr_flags;
330 #define ADJUST(_f, _s) do { \
331 if (flags & MONITOR_FLAG_##_f) \
332 local->fif_##_s += offset; \
335 ADJUST(FCSFAIL, fcsfail);
336 ADJUST(PLCPFAIL, plcpfail);
337 ADJUST(CONTROL, control);
338 ADJUST(CONTROL, pspoll);
339 ADJUST(OTHER_BSS, other_bss);
344 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
346 struct ieee80211_local *local = sdata->local;
349 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
350 if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
351 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
352 else if (local->hw.queues >= IEEE80211_NUM_ACS)
353 sdata->vif.hw_queue[i] = i;
355 sdata->vif.hw_queue[i] = 0;
357 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
360 static int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
362 struct ieee80211_sub_if_data *sdata;
365 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
370 if (local->monitor_sdata)
373 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
378 sdata->local = local;
379 sdata->vif.type = NL80211_IFTYPE_MONITOR;
380 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
381 wiphy_name(local->hw.wiphy));
383 ieee80211_set_default_queues(sdata);
385 ret = drv_add_interface(local, sdata);
387 /* ok .. stupid driver, it asked for this! */
392 ret = ieee80211_check_queues(sdata);
398 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
399 IEEE80211_CHANCTX_EXCLUSIVE);
401 drv_remove_interface(local, sdata);
406 mutex_lock(&local->iflist_mtx);
407 rcu_assign_pointer(local->monitor_sdata, sdata);
408 mutex_unlock(&local->iflist_mtx);
413 static void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
415 struct ieee80211_sub_if_data *sdata;
417 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
422 mutex_lock(&local->iflist_mtx);
424 sdata = rcu_dereference_protected(local->monitor_sdata,
425 lockdep_is_held(&local->iflist_mtx));
427 mutex_unlock(&local->iflist_mtx);
431 rcu_assign_pointer(local->monitor_sdata, NULL);
432 mutex_unlock(&local->iflist_mtx);
436 ieee80211_vif_release_channel(sdata);
438 drv_remove_interface(local, sdata);
444 * NOTE: Be very careful when changing this function, it must NOT return
445 * an error on interface type changes that have been pre-checked, so most
446 * checks should be in ieee80211_check_concurrent_iface.
448 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
450 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
451 struct net_device *dev = wdev->netdev;
452 struct ieee80211_local *local = sdata->local;
453 struct sta_info *sta;
456 u32 hw_reconf_flags = 0;
458 switch (sdata->vif.type) {
459 case NL80211_IFTYPE_WDS:
460 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
463 case NL80211_IFTYPE_AP_VLAN: {
464 struct ieee80211_sub_if_data *master;
469 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
471 master = container_of(sdata->bss,
472 struct ieee80211_sub_if_data, u.ap);
473 sdata->control_port_protocol =
474 master->control_port_protocol;
475 sdata->control_port_no_encrypt =
476 master->control_port_no_encrypt;
479 case NL80211_IFTYPE_AP:
480 sdata->bss = &sdata->u.ap;
482 case NL80211_IFTYPE_MESH_POINT:
483 case NL80211_IFTYPE_STATION:
484 case NL80211_IFTYPE_MONITOR:
485 case NL80211_IFTYPE_ADHOC:
486 case NL80211_IFTYPE_P2P_DEVICE:
487 /* no special treatment */
489 case NL80211_IFTYPE_UNSPECIFIED:
490 case NUM_NL80211_IFTYPES:
491 case NL80211_IFTYPE_P2P_CLIENT:
492 case NL80211_IFTYPE_P2P_GO:
498 if (local->open_count == 0) {
499 res = drv_start(local);
502 if (local->ops->napi_poll)
503 napi_enable(&local->napi);
504 /* we're brought up, everything changes */
505 hw_reconf_flags = ~0;
506 ieee80211_led_radio(local, true);
507 ieee80211_mod_tpt_led_trig(local,
508 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
512 * Copy the hopefully now-present MAC address to
513 * this interface, if it has the special null one.
515 if (dev && is_zero_ether_addr(dev->dev_addr)) {
516 memcpy(dev->dev_addr,
517 local->hw.wiphy->perm_addr,
519 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
521 if (!is_valid_ether_addr(dev->dev_addr)) {
522 res = -EADDRNOTAVAIL;
527 switch (sdata->vif.type) {
528 case NL80211_IFTYPE_AP_VLAN:
529 /* no need to tell driver, but set carrier and chanctx */
530 if (rtnl_dereference(sdata->bss->beacon)) {
531 ieee80211_vif_vlan_copy_chanctx(sdata);
532 netif_carrier_on(dev);
534 netif_carrier_off(dev);
537 case NL80211_IFTYPE_MONITOR:
538 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
539 local->cooked_mntrs++;
543 if (local->monitors == 0 && local->open_count == 0) {
544 res = ieee80211_add_virtual_monitor(local);
549 /* must be before the call to ieee80211_configure_filter */
551 if (local->monitors == 1) {
552 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
553 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
556 ieee80211_adjust_monitor_flags(sdata, 1);
557 ieee80211_configure_filter(local);
558 mutex_lock(&local->mtx);
559 ieee80211_recalc_idle(local);
560 mutex_unlock(&local->mtx);
562 netif_carrier_on(dev);
566 ieee80211_del_virtual_monitor(local);
568 res = drv_add_interface(local, sdata);
571 res = ieee80211_check_queues(sdata);
573 goto err_del_interface;
576 drv_add_interface_debugfs(local, sdata);
578 if (sdata->vif.type == NL80211_IFTYPE_AP) {
580 local->fif_probe_req++;
582 ieee80211_configure_filter(local);
583 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
584 local->fif_probe_req++;
587 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
588 changed |= ieee80211_reset_erp_info(sdata);
589 ieee80211_bss_info_change_notify(sdata, changed);
591 switch (sdata->vif.type) {
592 case NL80211_IFTYPE_STATION:
593 case NL80211_IFTYPE_ADHOC:
594 case NL80211_IFTYPE_AP:
595 case NL80211_IFTYPE_MESH_POINT:
596 netif_carrier_off(dev);
598 case NL80211_IFTYPE_WDS:
599 case NL80211_IFTYPE_P2P_DEVICE:
602 netif_carrier_on(dev);
606 * set default queue parameters so drivers don't
607 * need to initialise the hardware if the hardware
608 * doesn't start up with sane defaults
610 ieee80211_set_wmm_default(sdata, true);
613 set_bit(SDATA_STATE_RUNNING, &sdata->state);
615 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
616 /* Create STA entry for the WDS peer */
617 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
621 goto err_del_interface;
624 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
625 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
626 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
628 res = sta_info_insert(sta);
630 /* STA has been freed */
631 goto err_del_interface;
634 rate_control_rate_init(sta);
635 netif_carrier_on(dev);
636 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
637 rcu_assign_pointer(local->p2p_sdata, sdata);
641 * set_multicast_list will be invoked by the networking core
642 * which will check whether any increments here were done in
643 * error and sync them down to the hardware as filter flags.
645 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
646 atomic_inc(&local->iff_allmultis);
648 if (sdata->flags & IEEE80211_SDATA_PROMISC)
649 atomic_inc(&local->iff_promiscs);
655 ieee80211_hw_config(local, hw_reconf_flags);
657 ieee80211_recalc_ps(local, -1);
660 netif_tx_start_all_queues(dev);
664 drv_remove_interface(local, sdata);
666 if (!local->open_count)
670 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
671 list_del(&sdata->u.vlan.list);
672 /* might already be clear but that doesn't matter */
673 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
677 static int ieee80211_open(struct net_device *dev)
679 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
682 /* fail early if user set an invalid address */
683 if (!is_valid_ether_addr(dev->dev_addr))
684 return -EADDRNOTAVAIL;
686 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
690 return ieee80211_do_open(&sdata->wdev, true);
693 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
696 struct ieee80211_local *local = sdata->local;
698 struct sk_buff *skb, *tmp;
699 u32 hw_reconf_flags = 0;
703 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
705 if (rcu_access_pointer(local->scan_sdata) == sdata)
706 ieee80211_scan_cancel(local);
709 * Stop TX on this interface first.
712 netif_tx_stop_all_queues(sdata->dev);
714 ieee80211_roc_purge(sdata);
716 if (sdata->vif.type == NL80211_IFTYPE_STATION)
717 ieee80211_mgd_stop(sdata);
720 * Remove all stations associated with this interface.
722 * This must be done before calling ops->remove_interface()
723 * because otherwise we can later invoke ops->sta_notify()
724 * whenever the STAs are removed, and that invalidates driver
725 * assumptions about always getting a vif pointer that is valid
726 * (because if we remove a STA after ops->remove_interface()
727 * the driver will have removed the vif info already!)
729 * This is relevant only in WDS mode, in all other modes we've
730 * already removed all stations when disconnecting or similar,
733 * We call sta_info_flush_cleanup() later, to combine RCU waits.
735 flushed = sta_info_flush_defer(sdata);
736 WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
737 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
740 * Don't count this interface for promisc/allmulti while it
741 * is down. dev_mc_unsync() will invoke set_multicast_list
742 * on the master interface which will sync these down to the
743 * hardware as filter flags.
745 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
746 atomic_dec(&local->iff_allmultis);
748 if (sdata->flags & IEEE80211_SDATA_PROMISC)
749 atomic_dec(&local->iff_promiscs);
751 if (sdata->vif.type == NL80211_IFTYPE_AP) {
753 local->fif_probe_req--;
754 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
755 local->fif_probe_req--;
759 netif_addr_lock_bh(sdata->dev);
760 spin_lock_bh(&local->filter_lock);
761 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
762 sdata->dev->addr_len);
763 spin_unlock_bh(&local->filter_lock);
764 netif_addr_unlock_bh(sdata->dev);
766 ieee80211_configure_filter(local);
769 del_timer_sync(&local->dynamic_ps_timer);
770 cancel_work_sync(&local->dynamic_ps_enable_work);
772 cancel_work_sync(&sdata->recalc_smps);
774 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
776 if (sdata->wdev.cac_started) {
777 mutex_lock(&local->iflist_mtx);
778 ieee80211_vif_release_channel(sdata);
779 mutex_unlock(&local->iflist_mtx);
780 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_ABORTED,
784 /* APs need special treatment */
785 if (sdata->vif.type == NL80211_IFTYPE_AP) {
786 struct ieee80211_sub_if_data *vlan, *tmpsdata;
788 /* down all dependent devices, that is VLANs */
789 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
791 dev_close(vlan->dev);
792 WARN_ON(!list_empty(&sdata->u.ap.vlans));
793 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
794 /* remove all packets in parent bc_buf pointing to this dev */
795 ps = &sdata->bss->ps;
797 spin_lock_irqsave(&ps->bc_buf.lock, flags);
798 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
799 if (skb->dev == sdata->dev) {
800 __skb_unlink(skb, &ps->bc_buf);
801 local->total_ps_buffered--;
802 ieee80211_free_txskb(&local->hw, skb);
805 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
811 switch (sdata->vif.type) {
812 case NL80211_IFTYPE_AP_VLAN:
813 list_del(&sdata->u.vlan.list);
814 rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
815 /* no need to tell driver */
817 case NL80211_IFTYPE_MONITOR:
818 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
819 local->cooked_mntrs--;
824 if (local->monitors == 0) {
825 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
826 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
827 ieee80211_del_virtual_monitor(local);
830 ieee80211_adjust_monitor_flags(sdata, -1);
831 ieee80211_configure_filter(local);
832 mutex_lock(&local->mtx);
833 ieee80211_recalc_idle(local);
834 mutex_unlock(&local->mtx);
836 case NL80211_IFTYPE_P2P_DEVICE:
837 /* relies on synchronize_rcu() below */
838 rcu_assign_pointer(local->p2p_sdata, NULL);
841 cancel_work_sync(&sdata->work);
843 * When we get here, the interface is marked down.
845 * sta_info_flush_cleanup() requires rcu_barrier()
846 * first to wait for the station call_rcu() calls
847 * to complete, here we need at least sychronize_rcu()
848 * it to wait for the RX path in case it is using the
849 * interface and enqueuing frames at this very time on
853 sta_info_flush_cleanup(sdata);
855 skb_queue_purge(&sdata->skb_queue);
858 * Free all remaining keys, there shouldn't be any,
859 * except maybe group keys in AP more or WDS?
861 ieee80211_free_keys(sdata);
863 drv_remove_interface_debugfs(local, sdata);
866 drv_remove_interface(local, sdata);
871 ieee80211_recalc_ps(local, -1);
873 if (local->open_count == 0) {
874 if (local->ops->napi_poll)
875 napi_disable(&local->napi);
876 ieee80211_clear_tx_pending(local);
877 ieee80211_stop_device(local);
879 /* no reconfiguring after stop! */
883 /* do after stop to avoid reconfiguring when we stop anyway */
885 ieee80211_hw_config(local, hw_reconf_flags);
887 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
888 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
889 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
890 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
891 if (info->control.vif == &sdata->vif) {
892 __skb_unlink(skb, &local->pending[i]);
893 ieee80211_free_txskb(&local->hw, skb);
897 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
899 if (local->monitors == local->open_count && local->monitors > 0)
900 ieee80211_add_virtual_monitor(local);
903 static int ieee80211_stop(struct net_device *dev)
905 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
907 ieee80211_do_stop(sdata, true);
912 static void ieee80211_set_multicast_list(struct net_device *dev)
914 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
915 struct ieee80211_local *local = sdata->local;
916 int allmulti, promisc, sdata_allmulti, sdata_promisc;
918 allmulti = !!(dev->flags & IFF_ALLMULTI);
919 promisc = !!(dev->flags & IFF_PROMISC);
920 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
921 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
923 if (allmulti != sdata_allmulti) {
924 if (dev->flags & IFF_ALLMULTI)
925 atomic_inc(&local->iff_allmultis);
927 atomic_dec(&local->iff_allmultis);
928 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
931 if (promisc != sdata_promisc) {
932 if (dev->flags & IFF_PROMISC)
933 atomic_inc(&local->iff_promiscs);
935 atomic_dec(&local->iff_promiscs);
936 sdata->flags ^= IEEE80211_SDATA_PROMISC;
938 spin_lock_bh(&local->filter_lock);
939 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
940 spin_unlock_bh(&local->filter_lock);
941 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
945 * Called when the netdev is removed or, by the code below, before
946 * the interface type changes.
948 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
953 /* free extra data */
954 ieee80211_free_keys(sdata);
956 ieee80211_debugfs_remove_netdev(sdata);
958 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
959 __skb_queue_purge(&sdata->fragments[i].skb_list);
960 sdata->fragment_next = 0;
962 if (ieee80211_vif_is_mesh(&sdata->vif))
963 mesh_rmc_free(sdata);
965 flushed = sta_info_flush(sdata);
969 static void ieee80211_uninit(struct net_device *dev)
971 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
974 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
977 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
980 static const struct net_device_ops ieee80211_dataif_ops = {
981 .ndo_open = ieee80211_open,
982 .ndo_stop = ieee80211_stop,
983 .ndo_uninit = ieee80211_uninit,
984 .ndo_start_xmit = ieee80211_subif_start_xmit,
985 .ndo_set_rx_mode = ieee80211_set_multicast_list,
986 .ndo_change_mtu = ieee80211_change_mtu,
987 .ndo_set_mac_address = ieee80211_change_mac,
988 .ndo_select_queue = ieee80211_netdev_select_queue,
991 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
994 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
995 struct ieee80211_local *local = sdata->local;
996 struct ieee80211_hdr *hdr;
997 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
999 if (local->hw.queues < IEEE80211_NUM_ACS)
1003 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
1004 return 0; /* doesn't matter, frame will be dropped */
1006 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
1008 return ieee80211_select_queue_80211(sdata, skb, hdr);
1011 static const struct net_device_ops ieee80211_monitorif_ops = {
1012 .ndo_open = ieee80211_open,
1013 .ndo_stop = ieee80211_stop,
1014 .ndo_uninit = ieee80211_uninit,
1015 .ndo_start_xmit = ieee80211_monitor_start_xmit,
1016 .ndo_set_rx_mode = ieee80211_set_multicast_list,
1017 .ndo_change_mtu = ieee80211_change_mtu,
1018 .ndo_set_mac_address = eth_mac_addr,
1019 .ndo_select_queue = ieee80211_monitor_select_queue,
1022 static void ieee80211_if_setup(struct net_device *dev)
1025 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1026 dev->netdev_ops = &ieee80211_dataif_ops;
1027 dev->destructor = free_netdev;
1030 static void ieee80211_iface_work(struct work_struct *work)
1032 struct ieee80211_sub_if_data *sdata =
1033 container_of(work, struct ieee80211_sub_if_data, work);
1034 struct ieee80211_local *local = sdata->local;
1035 struct sk_buff *skb;
1036 struct sta_info *sta;
1037 struct ieee80211_ra_tid *ra_tid;
1039 if (!ieee80211_sdata_running(sdata))
1042 if (local->scanning)
1046 * ieee80211_queue_work() should have picked up most cases,
1047 * here we'll pick the rest.
1049 if (WARN(local->suspended,
1050 "interface work scheduled while going to suspend\n"))
1053 /* first process frames */
1054 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1055 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1057 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1058 ra_tid = (void *)&skb->cb;
1059 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1061 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1062 ra_tid = (void *)&skb->cb;
1063 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1065 } else if (ieee80211_is_action(mgmt->frame_control) &&
1066 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1069 mutex_lock(&local->sta_mtx);
1070 sta = sta_info_get_bss(sdata, mgmt->sa);
1072 switch (mgmt->u.action.u.addba_req.action_code) {
1073 case WLAN_ACTION_ADDBA_REQ:
1074 ieee80211_process_addba_request(
1075 local, sta, mgmt, len);
1077 case WLAN_ACTION_ADDBA_RESP:
1078 ieee80211_process_addba_resp(local, sta,
1081 case WLAN_ACTION_DELBA:
1082 ieee80211_process_delba(sdata, sta,
1090 mutex_unlock(&local->sta_mtx);
1091 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1092 struct ieee80211_hdr *hdr = (void *)mgmt;
1094 * So the frame isn't mgmt, but frame_control
1095 * is at the right place anyway, of course, so
1096 * the if statement is correct.
1098 * Warn if we have other data frame types here,
1099 * they must not get here.
1101 WARN_ON(hdr->frame_control &
1102 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1103 WARN_ON(!(hdr->seq_ctrl &
1104 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1106 * This was a fragment of a frame, received while
1107 * a block-ack session was active. That cannot be
1108 * right, so terminate the session.
1110 mutex_lock(&local->sta_mtx);
1111 sta = sta_info_get_bss(sdata, mgmt->sa);
1113 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1114 IEEE80211_QOS_CTL_TID_MASK;
1116 __ieee80211_stop_rx_ba_session(
1117 sta, tid, WLAN_BACK_RECIPIENT,
1118 WLAN_REASON_QSTA_REQUIRE_SETUP,
1121 mutex_unlock(&local->sta_mtx);
1122 } else switch (sdata->vif.type) {
1123 case NL80211_IFTYPE_STATION:
1124 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1126 case NL80211_IFTYPE_ADHOC:
1127 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1129 case NL80211_IFTYPE_MESH_POINT:
1130 if (!ieee80211_vif_is_mesh(&sdata->vif))
1132 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1135 WARN(1, "frame for unexpected interface type");
1142 /* then other type-dependent work */
1143 switch (sdata->vif.type) {
1144 case NL80211_IFTYPE_STATION:
1145 ieee80211_sta_work(sdata);
1147 case NL80211_IFTYPE_ADHOC:
1148 ieee80211_ibss_work(sdata);
1150 case NL80211_IFTYPE_MESH_POINT:
1151 if (!ieee80211_vif_is_mesh(&sdata->vif))
1153 ieee80211_mesh_work(sdata);
1160 static void ieee80211_recalc_smps_work(struct work_struct *work)
1162 struct ieee80211_sub_if_data *sdata =
1163 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1165 ieee80211_recalc_smps(sdata);
1169 * Helper function to initialise an interface to a specific type.
1171 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1172 enum nl80211_iftype type)
1174 /* clear type-dependent union */
1175 memset(&sdata->u, 0, sizeof(sdata->u));
1177 /* and set some type-dependent values */
1178 sdata->vif.type = type;
1179 sdata->vif.p2p = false;
1180 sdata->wdev.iftype = type;
1182 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1183 sdata->control_port_no_encrypt = false;
1185 sdata->noack_map = 0;
1187 /* only monitor/p2p-device differ */
1189 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1190 sdata->dev->type = ARPHRD_ETHER;
1193 skb_queue_head_init(&sdata->skb_queue);
1194 INIT_WORK(&sdata->work, ieee80211_iface_work);
1195 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1198 case NL80211_IFTYPE_P2P_GO:
1199 type = NL80211_IFTYPE_AP;
1200 sdata->vif.type = type;
1201 sdata->vif.p2p = true;
1203 case NL80211_IFTYPE_AP:
1204 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1205 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1206 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1208 case NL80211_IFTYPE_P2P_CLIENT:
1209 type = NL80211_IFTYPE_STATION;
1210 sdata->vif.type = type;
1211 sdata->vif.p2p = true;
1213 case NL80211_IFTYPE_STATION:
1214 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1215 ieee80211_sta_setup_sdata(sdata);
1217 case NL80211_IFTYPE_ADHOC:
1218 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1219 ieee80211_ibss_setup_sdata(sdata);
1221 case NL80211_IFTYPE_MESH_POINT:
1222 if (ieee80211_vif_is_mesh(&sdata->vif))
1223 ieee80211_mesh_init_sdata(sdata);
1225 case NL80211_IFTYPE_MONITOR:
1226 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1227 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1228 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1229 MONITOR_FLAG_OTHER_BSS;
1231 case NL80211_IFTYPE_WDS:
1232 sdata->vif.bss_conf.bssid = NULL;
1234 case NL80211_IFTYPE_AP_VLAN:
1236 case NL80211_IFTYPE_P2P_DEVICE:
1237 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1239 case NL80211_IFTYPE_UNSPECIFIED:
1240 case NUM_NL80211_IFTYPES:
1245 ieee80211_debugfs_add_netdev(sdata);
1248 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1249 enum nl80211_iftype type)
1251 struct ieee80211_local *local = sdata->local;
1253 enum nl80211_iftype internal_type = type;
1258 if (!local->ops->change_interface)
1261 switch (sdata->vif.type) {
1262 case NL80211_IFTYPE_AP:
1263 case NL80211_IFTYPE_STATION:
1264 case NL80211_IFTYPE_ADHOC:
1266 * Could maybe also all others here?
1267 * Just not sure how that interacts
1268 * with the RX/config path e.g. for
1277 case NL80211_IFTYPE_AP:
1278 case NL80211_IFTYPE_STATION:
1279 case NL80211_IFTYPE_ADHOC:
1281 * Could probably support everything
1282 * but WDS here (WDS do_open can fail
1283 * under memory pressure, which this
1284 * code isn't prepared to handle).
1287 case NL80211_IFTYPE_P2P_CLIENT:
1289 internal_type = NL80211_IFTYPE_STATION;
1291 case NL80211_IFTYPE_P2P_GO:
1293 internal_type = NL80211_IFTYPE_AP;
1299 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1303 ieee80211_do_stop(sdata, false);
1305 ieee80211_teardown_sdata(sdata);
1307 ret = drv_change_interface(local, sdata, internal_type, p2p);
1309 type = sdata->vif.type;
1312 * Ignore return value here, there's not much we can do since
1313 * the driver changed the interface type internally already.
1314 * The warnings will hopefully make driver authors fix it :-)
1316 ieee80211_check_queues(sdata);
1318 ieee80211_setup_sdata(sdata, type);
1320 err = ieee80211_do_open(&sdata->wdev, false);
1321 WARN(err, "type change: do_open returned %d", err);
1326 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1327 enum nl80211_iftype type)
1333 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1336 if (ieee80211_sdata_running(sdata)) {
1337 ret = ieee80211_runtime_change_iftype(sdata, type);
1341 /* Purge and reset type-dependent state. */
1342 ieee80211_teardown_sdata(sdata);
1343 ieee80211_setup_sdata(sdata, type);
1346 /* reset some values that shouldn't be kept across type changes */
1347 sdata->drop_unencrypted = 0;
1348 if (type == NL80211_IFTYPE_STATION)
1349 sdata->u.mgd.use_4addr = false;
1354 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1355 u8 *perm_addr, enum nl80211_iftype type)
1357 struct ieee80211_sub_if_data *sdata;
1358 u64 mask, start, addr, val, inc;
1360 u8 tmp_addr[ETH_ALEN];
1363 /* default ... something at least */
1364 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1366 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1367 local->hw.wiphy->n_addresses <= 1)
1370 mutex_lock(&local->iflist_mtx);
1373 case NL80211_IFTYPE_MONITOR:
1374 /* doesn't matter */
1376 case NL80211_IFTYPE_WDS:
1377 case NL80211_IFTYPE_AP_VLAN:
1378 /* match up with an AP interface */
1379 list_for_each_entry(sdata, &local->interfaces, list) {
1380 if (sdata->vif.type != NL80211_IFTYPE_AP)
1382 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1385 /* keep default if no AP interface present */
1387 case NL80211_IFTYPE_P2P_CLIENT:
1388 case NL80211_IFTYPE_P2P_GO:
1389 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1390 list_for_each_entry(sdata, &local->interfaces, list) {
1391 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1393 if (!ieee80211_sdata_running(sdata))
1395 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1399 /* otherwise fall through */
1401 /* assign a new address if possible -- try n_addresses first */
1402 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1405 list_for_each_entry(sdata, &local->interfaces, list) {
1406 if (memcmp(local->hw.wiphy->addresses[i].addr,
1407 sdata->vif.addr, ETH_ALEN) == 0) {
1415 local->hw.wiphy->addresses[i].addr,
1421 /* try mask if available */
1422 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1425 m = local->hw.wiphy->addr_mask;
1426 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1427 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1428 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1430 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1431 /* not a contiguous mask ... not handled now! */
1432 pr_info("not contiguous\n");
1436 m = local->hw.wiphy->perm_addr;
1437 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1438 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1439 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1441 inc = 1ULL<<__ffs64(mask);
1442 val = (start & mask);
1443 addr = (start & ~mask) | (val & mask);
1447 tmp_addr[5] = addr >> 0*8;
1448 tmp_addr[4] = addr >> 1*8;
1449 tmp_addr[3] = addr >> 2*8;
1450 tmp_addr[2] = addr >> 3*8;
1451 tmp_addr[1] = addr >> 4*8;
1452 tmp_addr[0] = addr >> 5*8;
1456 list_for_each_entry(sdata, &local->interfaces, list) {
1457 if (memcmp(tmp_addr, sdata->vif.addr,
1465 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1468 addr = (start & ~mask) | (val & mask);
1469 } while (addr != start);
1475 mutex_unlock(&local->iflist_mtx);
1478 static void ieee80211_cleanup_sdata_stas_wk(struct work_struct *wk)
1480 struct ieee80211_sub_if_data *sdata;
1482 sdata = container_of(wk, struct ieee80211_sub_if_data, cleanup_stations_wk);
1484 ieee80211_cleanup_sdata_stas(sdata);
1487 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1488 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1489 struct vif_params *params)
1491 struct net_device *ndev = NULL;
1492 struct ieee80211_sub_if_data *sdata = NULL;
1498 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1499 struct wireless_dev *wdev;
1501 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1505 wdev = &sdata->wdev;
1508 strlcpy(sdata->name, name, IFNAMSIZ);
1509 ieee80211_assign_perm_addr(local, wdev->address, type);
1510 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1512 if (local->hw.queues >= IEEE80211_NUM_ACS)
1513 txqs = IEEE80211_NUM_ACS;
1515 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1516 local->hw.vif_data_size,
1517 name, ieee80211_if_setup, txqs, 1);
1520 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1522 ndev->needed_headroom = local->tx_headroom +
1523 4*6 /* four MAC addresses */
1524 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1526 + 8 /* rfc1042/bridge tunnel */
1527 - ETH_HLEN /* ethernet hard_header_len */
1528 + IEEE80211_ENCRYPT_HEADROOM;
1529 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1531 ret = dev_alloc_name(ndev, ndev->name);
1537 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1538 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1539 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1541 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1542 sdata = netdev_priv(ndev);
1543 ndev->ieee80211_ptr = &sdata->wdev;
1544 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1545 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1550 /* initialise type-independent data */
1551 sdata->wdev.wiphy = local->hw.wiphy;
1552 sdata->local = local;
1554 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1555 skb_queue_head_init(&sdata->fragments[i].skb_list);
1557 INIT_LIST_HEAD(&sdata->key_list);
1559 spin_lock_init(&sdata->cleanup_stations_lock);
1560 INIT_LIST_HEAD(&sdata->cleanup_stations);
1561 INIT_WORK(&sdata->cleanup_stations_wk, ieee80211_cleanup_sdata_stas_wk);
1562 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1563 ieee80211_dfs_cac_timer_work);
1565 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1566 struct ieee80211_supported_band *sband;
1567 sband = local->hw.wiphy->bands[i];
1568 sdata->rc_rateidx_mask[i] =
1569 sband ? (1 << sband->n_bitrates) - 1 : 0;
1571 memcpy(sdata->rc_rateidx_mcs_mask[i],
1572 sband->ht_cap.mcs.rx_mask,
1573 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1575 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1576 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1579 ieee80211_set_default_queues(sdata);
1581 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1582 sdata->user_power_level = local->user_power_level;
1584 /* setup type-dependent data */
1585 ieee80211_setup_sdata(sdata, type);
1589 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1590 if (type == NL80211_IFTYPE_STATION)
1591 sdata->u.mgd.use_4addr = params->use_4addr;
1594 ndev->features |= local->hw.netdev_features;
1596 ret = register_netdevice(ndev);
1603 mutex_lock(&local->iflist_mtx);
1604 list_add_tail_rcu(&sdata->list, &local->interfaces);
1605 mutex_unlock(&local->iflist_mtx);
1608 *new_wdev = &sdata->wdev;
1613 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1617 mutex_lock(&sdata->local->iflist_mtx);
1618 list_del_rcu(&sdata->list);
1619 mutex_unlock(&sdata->local->iflist_mtx);
1624 unregister_netdevice(sdata->dev);
1626 cfg80211_unregister_wdev(&sdata->wdev);
1631 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1633 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1635 ieee80211_do_stop(sdata, true);
1636 ieee80211_teardown_sdata(sdata);
1640 * Remove all interfaces, may only be called at hardware unregistration
1641 * time because it doesn't do RCU-safe list removals.
1643 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1645 struct ieee80211_sub_if_data *sdata, *tmp;
1646 LIST_HEAD(unreg_list);
1647 LIST_HEAD(wdev_list);
1651 mutex_lock(&local->iflist_mtx);
1652 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1653 list_del(&sdata->list);
1656 unregister_netdevice_queue(sdata->dev, &unreg_list);
1658 list_add(&sdata->list, &wdev_list);
1660 mutex_unlock(&local->iflist_mtx);
1661 unregister_netdevice_many(&unreg_list);
1662 list_del(&unreg_list);
1664 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1665 list_del(&sdata->list);
1666 cfg80211_unregister_wdev(&sdata->wdev);
1671 static int netdev_notify(struct notifier_block *nb,
1672 unsigned long state,
1675 struct net_device *dev = ndev;
1676 struct ieee80211_sub_if_data *sdata;
1678 if (state != NETDEV_CHANGENAME)
1681 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1684 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1687 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1689 memcpy(sdata->name, dev->name, IFNAMSIZ);
1691 ieee80211_debugfs_rename_netdev(sdata);
1695 static struct notifier_block mac80211_netdev_notifier = {
1696 .notifier_call = netdev_notify,
1699 int ieee80211_iface_init(void)
1701 return register_netdevice_notifier(&mac80211_netdev_notifier);
1704 void ieee80211_iface_exit(void)
1706 unregister_netdevice_notifier(&mac80211_netdev_notifier);