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 void ieee80211_recalc_idle(struct ieee80211_local *local)
103 bool working = false, scanning, active;
104 unsigned int led_trig_start = 0, led_trig_stop = 0;
105 struct ieee80211_roc_work *roc;
108 lockdep_assert_held(&local->mtx);
110 active = !list_empty(&local->chanctx_list);
112 if (!local->ops->remain_on_channel) {
113 list_for_each_entry(roc, &local->roc_list, list) {
119 scanning = test_bit(SCAN_SW_SCANNING, &local->scanning) ||
120 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning);
122 if (working || scanning)
123 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
125 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
128 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
130 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_CONNECTED;
132 ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
134 if (working || scanning || active)
135 change = ieee80211_idle_off(local);
137 change = ieee80211_idle_on(local);
139 ieee80211_hw_config(local, change);
142 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
144 if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
151 static int ieee80211_verify_mac(struct ieee80211_local *local, u8 *addr)
153 struct ieee80211_sub_if_data *sdata;
158 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
162 new = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
163 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
164 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
166 m = local->hw.wiphy->addr_mask;
167 mask = ((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);
172 mutex_lock(&local->iflist_mtx);
173 list_for_each_entry(sdata, &local->interfaces, list) {
174 if (sdata->vif.type == NL80211_IFTYPE_MONITOR)
178 tmp = ((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);
182 if ((new & ~mask) != (tmp & ~mask)) {
187 mutex_unlock(&local->iflist_mtx);
192 static int ieee80211_change_mac(struct net_device *dev, void *addr)
194 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
195 struct sockaddr *sa = addr;
198 if (ieee80211_sdata_running(sdata))
201 ret = ieee80211_verify_mac(sdata->local, sa->sa_data);
205 ret = eth_mac_addr(dev, sa);
208 memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
213 static inline int identical_mac_addr_allowed(int type1, int type2)
215 return type1 == NL80211_IFTYPE_MONITOR ||
216 type2 == NL80211_IFTYPE_MONITOR ||
217 type1 == NL80211_IFTYPE_P2P_DEVICE ||
218 type2 == NL80211_IFTYPE_P2P_DEVICE ||
219 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_WDS) ||
220 (type1 == NL80211_IFTYPE_WDS &&
221 (type2 == NL80211_IFTYPE_WDS ||
222 type2 == NL80211_IFTYPE_AP)) ||
223 (type1 == NL80211_IFTYPE_AP && type2 == NL80211_IFTYPE_AP_VLAN) ||
224 (type1 == NL80211_IFTYPE_AP_VLAN &&
225 (type2 == NL80211_IFTYPE_AP ||
226 type2 == NL80211_IFTYPE_AP_VLAN));
229 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data *sdata,
230 enum nl80211_iftype iftype)
232 struct ieee80211_local *local = sdata->local;
233 struct ieee80211_sub_if_data *nsdata;
237 /* we hold the RTNL here so can safely walk the list */
238 list_for_each_entry(nsdata, &local->interfaces, list) {
239 if (nsdata != sdata && ieee80211_sdata_running(nsdata)) {
241 * Allow only a single IBSS interface to be up at any
242 * time. This is restricted because beacon distribution
243 * cannot work properly if both are in the same IBSS.
245 * To remove this restriction we'd have to disallow them
246 * from setting the same SSID on different IBSS interfaces
247 * belonging to the same hardware. Then, however, we're
248 * faced with having to adopt two different TSF timers...
250 if (iftype == NL80211_IFTYPE_ADHOC &&
251 nsdata->vif.type == NL80211_IFTYPE_ADHOC)
255 * The remaining checks are only performed for interfaces
256 * with the same MAC address.
258 if (!ether_addr_equal(sdata->vif.addr,
263 * check whether it may have the same address
265 if (!identical_mac_addr_allowed(iftype,
270 * can only add VLANs to enabled APs
272 if (iftype == NL80211_IFTYPE_AP_VLAN &&
273 nsdata->vif.type == NL80211_IFTYPE_AP)
274 sdata->bss = &nsdata->u.ap;
281 static int ieee80211_check_queues(struct ieee80211_sub_if_data *sdata)
283 int n_queues = sdata->local->hw.queues;
286 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
287 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
288 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] ==
289 IEEE80211_INVAL_HW_QUEUE))
291 if (WARN_ON_ONCE(sdata->vif.hw_queue[i] >=
297 if ((sdata->vif.type != NL80211_IFTYPE_AP) ||
298 !(sdata->local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)) {
299 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
303 if (WARN_ON_ONCE(sdata->vif.cab_queue == IEEE80211_INVAL_HW_QUEUE))
306 if (WARN_ON_ONCE(sdata->vif.cab_queue >= n_queues))
312 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
315 struct ieee80211_local *local = sdata->local;
316 u32 flags = sdata->u.mntr_flags;
318 #define ADJUST(_f, _s) do { \
319 if (flags & MONITOR_FLAG_##_f) \
320 local->fif_##_s += offset; \
323 ADJUST(FCSFAIL, fcsfail);
324 ADJUST(PLCPFAIL, plcpfail);
325 ADJUST(CONTROL, control);
326 ADJUST(CONTROL, pspoll);
327 ADJUST(OTHER_BSS, other_bss);
332 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata)
334 struct ieee80211_local *local = sdata->local;
337 for (i = 0; i < IEEE80211_NUM_ACS; i++) {
338 if (local->hw.flags & IEEE80211_HW_QUEUE_CONTROL)
339 sdata->vif.hw_queue[i] = IEEE80211_INVAL_HW_QUEUE;
340 else if (local->hw.queues >= IEEE80211_NUM_ACS)
341 sdata->vif.hw_queue[i] = i;
343 sdata->vif.hw_queue[i] = 0;
345 sdata->vif.cab_queue = IEEE80211_INVAL_HW_QUEUE;
348 static int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
350 struct ieee80211_sub_if_data *sdata;
353 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
356 mutex_lock(&local->iflist_mtx);
358 if (local->monitor_sdata)
361 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL);
368 sdata->local = local;
369 sdata->vif.type = NL80211_IFTYPE_MONITOR;
370 snprintf(sdata->name, IFNAMSIZ, "%s-monitor",
371 wiphy_name(local->hw.wiphy));
373 ieee80211_set_default_queues(sdata);
375 ret = drv_add_interface(local, sdata);
377 /* ok .. stupid driver, it asked for this! */
382 ret = ieee80211_check_queues(sdata);
388 ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef,
389 IEEE80211_CHANCTX_EXCLUSIVE);
391 drv_remove_interface(local, sdata);
396 rcu_assign_pointer(local->monitor_sdata, sdata);
398 mutex_unlock(&local->iflist_mtx);
402 static void ieee80211_del_virtual_monitor(struct ieee80211_local *local)
404 struct ieee80211_sub_if_data *sdata;
406 if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF))
409 mutex_lock(&local->iflist_mtx);
411 sdata = rcu_dereference_protected(local->monitor_sdata,
412 lockdep_is_held(&local->iflist_mtx));
416 rcu_assign_pointer(local->monitor_sdata, NULL);
419 ieee80211_vif_release_channel(sdata);
421 drv_remove_interface(local, sdata);
425 mutex_unlock(&local->iflist_mtx);
429 * NOTE: Be very careful when changing this function, it must NOT return
430 * an error on interface type changes that have been pre-checked, so most
431 * checks should be in ieee80211_check_concurrent_iface.
433 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up)
435 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
436 struct net_device *dev = wdev->netdev;
437 struct ieee80211_local *local = sdata->local;
438 struct sta_info *sta;
441 u32 hw_reconf_flags = 0;
443 switch (sdata->vif.type) {
444 case NL80211_IFTYPE_WDS:
445 if (!is_valid_ether_addr(sdata->u.wds.remote_addr))
448 case NL80211_IFTYPE_AP_VLAN: {
449 struct ieee80211_sub_if_data *master;
454 list_add(&sdata->u.vlan.list, &sdata->bss->vlans);
456 master = container_of(sdata->bss,
457 struct ieee80211_sub_if_data, u.ap);
458 sdata->control_port_protocol =
459 master->control_port_protocol;
460 sdata->control_port_no_encrypt =
461 master->control_port_no_encrypt;
464 case NL80211_IFTYPE_AP:
465 sdata->bss = &sdata->u.ap;
467 case NL80211_IFTYPE_MESH_POINT:
468 case NL80211_IFTYPE_STATION:
469 case NL80211_IFTYPE_MONITOR:
470 case NL80211_IFTYPE_ADHOC:
471 case NL80211_IFTYPE_P2P_DEVICE:
472 /* no special treatment */
474 case NL80211_IFTYPE_UNSPECIFIED:
475 case NUM_NL80211_IFTYPES:
476 case NL80211_IFTYPE_P2P_CLIENT:
477 case NL80211_IFTYPE_P2P_GO:
483 if (local->open_count == 0) {
484 res = drv_start(local);
487 if (local->ops->napi_poll)
488 napi_enable(&local->napi);
489 /* we're brought up, everything changes */
490 hw_reconf_flags = ~0;
491 ieee80211_led_radio(local, true);
492 ieee80211_mod_tpt_led_trig(local,
493 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
497 * Copy the hopefully now-present MAC address to
498 * this interface, if it has the special null one.
500 if (dev && is_zero_ether_addr(dev->dev_addr)) {
501 memcpy(dev->dev_addr,
502 local->hw.wiphy->perm_addr,
504 memcpy(dev->perm_addr, dev->dev_addr, ETH_ALEN);
506 if (!is_valid_ether_addr(dev->dev_addr)) {
507 res = -EADDRNOTAVAIL;
512 switch (sdata->vif.type) {
513 case NL80211_IFTYPE_AP_VLAN:
514 /* no need to tell driver, but set carrier and chanctx */
515 if (rtnl_dereference(sdata->bss->beacon)) {
516 ieee80211_vif_vlan_copy_chanctx(sdata);
517 netif_carrier_on(dev);
519 netif_carrier_off(dev);
522 case NL80211_IFTYPE_MONITOR:
523 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
524 local->cooked_mntrs++;
528 if (local->monitors == 0 && local->open_count == 0) {
529 res = ieee80211_add_virtual_monitor(local);
534 /* must be before the call to ieee80211_configure_filter */
536 if (local->monitors == 1) {
537 local->hw.conf.flags |= IEEE80211_CONF_MONITOR;
538 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
541 ieee80211_adjust_monitor_flags(sdata, 1);
542 ieee80211_configure_filter(local);
544 netif_carrier_on(dev);
548 ieee80211_del_virtual_monitor(local);
550 res = drv_add_interface(local, sdata);
553 res = ieee80211_check_queues(sdata);
555 goto err_del_interface;
558 drv_add_interface_debugfs(local, sdata);
560 if (sdata->vif.type == NL80211_IFTYPE_AP) {
562 local->fif_probe_req++;
564 ieee80211_configure_filter(local);
565 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
566 local->fif_probe_req++;
569 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
570 changed |= ieee80211_reset_erp_info(sdata);
571 ieee80211_bss_info_change_notify(sdata, changed);
573 switch (sdata->vif.type) {
574 case NL80211_IFTYPE_STATION:
575 case NL80211_IFTYPE_ADHOC:
576 case NL80211_IFTYPE_AP:
577 case NL80211_IFTYPE_MESH_POINT:
578 netif_carrier_off(dev);
580 case NL80211_IFTYPE_WDS:
581 case NL80211_IFTYPE_P2P_DEVICE:
584 netif_carrier_on(dev);
588 * set default queue parameters so drivers don't
589 * need to initialise the hardware if the hardware
590 * doesn't start up with sane defaults
592 ieee80211_set_wmm_default(sdata, true);
595 set_bit(SDATA_STATE_RUNNING, &sdata->state);
597 if (sdata->vif.type == NL80211_IFTYPE_WDS) {
598 /* Create STA entry for the WDS peer */
599 sta = sta_info_alloc(sdata, sdata->u.wds.remote_addr,
603 goto err_del_interface;
606 sta_info_pre_move_state(sta, IEEE80211_STA_AUTH);
607 sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC);
608 sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED);
610 res = sta_info_insert(sta);
612 /* STA has been freed */
613 goto err_del_interface;
616 rate_control_rate_init(sta);
617 netif_carrier_on(dev);
618 } else if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) {
619 rcu_assign_pointer(local->p2p_sdata, sdata);
623 * set_multicast_list will be invoked by the networking core
624 * which will check whether any increments here were done in
625 * error and sync them down to the hardware as filter flags.
627 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
628 atomic_inc(&local->iff_allmultis);
630 if (sdata->flags & IEEE80211_SDATA_PROMISC)
631 atomic_inc(&local->iff_promiscs);
637 ieee80211_hw_config(local, hw_reconf_flags);
639 ieee80211_recalc_ps(local, -1);
642 netif_tx_start_all_queues(dev);
646 drv_remove_interface(local, sdata);
648 if (!local->open_count)
652 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
653 list_del(&sdata->u.vlan.list);
654 /* might already be clear but that doesn't matter */
655 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
659 static int ieee80211_open(struct net_device *dev)
661 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
664 /* fail early if user set an invalid address */
665 if (!is_valid_ether_addr(dev->dev_addr))
666 return -EADDRNOTAVAIL;
668 err = ieee80211_check_concurrent_iface(sdata, sdata->vif.type);
672 return ieee80211_do_open(&sdata->wdev, true);
675 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata,
678 struct ieee80211_local *local = sdata->local;
680 struct sk_buff *skb, *tmp;
681 u32 hw_reconf_flags = 0;
685 clear_bit(SDATA_STATE_RUNNING, &sdata->state);
687 if (rcu_access_pointer(local->scan_sdata) == sdata)
688 ieee80211_scan_cancel(local);
691 * Stop TX on this interface first.
694 netif_tx_stop_all_queues(sdata->dev);
696 ieee80211_roc_purge(sdata);
699 * Remove all stations associated with this interface.
701 * This must be done before calling ops->remove_interface()
702 * because otherwise we can later invoke ops->sta_notify()
703 * whenever the STAs are removed, and that invalidates driver
704 * assumptions about always getting a vif pointer that is valid
705 * (because if we remove a STA after ops->remove_interface()
706 * the driver will have removed the vif info already!)
708 * This is relevant only in WDS mode, in all other modes we've
709 * already removed all stations when disconnecting or similar,
712 * We call sta_info_flush_cleanup() later, to combine RCU waits.
714 flushed = sta_info_flush_defer(sdata);
715 WARN_ON_ONCE((sdata->vif.type != NL80211_IFTYPE_WDS && flushed > 0) ||
716 (sdata->vif.type == NL80211_IFTYPE_WDS && flushed != 1));
719 * Don't count this interface for promisc/allmulti while it
720 * is down. dev_mc_unsync() will invoke set_multicast_list
721 * on the master interface which will sync these down to the
722 * hardware as filter flags.
724 if (sdata->flags & IEEE80211_SDATA_ALLMULTI)
725 atomic_dec(&local->iff_allmultis);
727 if (sdata->flags & IEEE80211_SDATA_PROMISC)
728 atomic_dec(&local->iff_promiscs);
730 if (sdata->vif.type == NL80211_IFTYPE_AP) {
732 local->fif_probe_req--;
733 } else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) {
734 local->fif_probe_req--;
738 netif_addr_lock_bh(sdata->dev);
739 spin_lock_bh(&local->filter_lock);
740 __hw_addr_unsync(&local->mc_list, &sdata->dev->mc,
741 sdata->dev->addr_len);
742 spin_unlock_bh(&local->filter_lock);
743 netif_addr_unlock_bh(sdata->dev);
745 ieee80211_configure_filter(local);
748 del_timer_sync(&local->dynamic_ps_timer);
749 cancel_work_sync(&local->dynamic_ps_enable_work);
751 cancel_work_sync(&sdata->recalc_smps);
753 cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
755 if (sdata->wdev.cac_started) {
756 mutex_lock(&local->iflist_mtx);
757 ieee80211_vif_release_channel(sdata);
758 mutex_unlock(&local->iflist_mtx);
759 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_ABORTED,
763 /* APs need special treatment */
764 if (sdata->vif.type == NL80211_IFTYPE_AP) {
765 struct ieee80211_sub_if_data *vlan, *tmpsdata;
767 /* down all dependent devices, that is VLANs */
768 list_for_each_entry_safe(vlan, tmpsdata, &sdata->u.ap.vlans,
770 dev_close(vlan->dev);
771 WARN_ON(!list_empty(&sdata->u.ap.vlans));
772 } else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
773 /* remove all packets in parent bc_buf pointing to this dev */
774 ps = &sdata->bss->ps;
776 spin_lock_irqsave(&ps->bc_buf.lock, flags);
777 skb_queue_walk_safe(&ps->bc_buf, skb, tmp) {
778 if (skb->dev == sdata->dev) {
779 __skb_unlink(skb, &ps->bc_buf);
780 local->total_ps_buffered--;
781 ieee80211_free_txskb(&local->hw, skb);
784 spin_unlock_irqrestore(&ps->bc_buf.lock, flags);
785 } else if (sdata->vif.type == NL80211_IFTYPE_STATION) {
786 ieee80211_mgd_stop(sdata);
792 switch (sdata->vif.type) {
793 case NL80211_IFTYPE_AP_VLAN:
794 list_del(&sdata->u.vlan.list);
795 rcu_assign_pointer(sdata->vif.chanctx_conf, NULL);
796 /* no need to tell driver */
798 case NL80211_IFTYPE_MONITOR:
799 if (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES) {
800 local->cooked_mntrs--;
805 if (local->monitors == 0) {
806 local->hw.conf.flags &= ~IEEE80211_CONF_MONITOR;
807 hw_reconf_flags |= IEEE80211_CONF_CHANGE_MONITOR;
808 ieee80211_del_virtual_monitor(local);
811 ieee80211_adjust_monitor_flags(sdata, -1);
812 ieee80211_configure_filter(local);
814 case NL80211_IFTYPE_P2P_DEVICE:
815 /* relies on synchronize_rcu() below */
816 rcu_assign_pointer(local->p2p_sdata, NULL);
819 cancel_work_sync(&sdata->work);
821 * When we get here, the interface is marked down.
823 * sta_info_flush_cleanup() requires rcu_barrier()
824 * first to wait for the station call_rcu() calls
825 * to complete, here we need at least sychronize_rcu()
826 * it to wait for the RX path in case it is using the
827 * interface and enqueuing frames at this very time on
831 sta_info_flush_cleanup(sdata);
833 skb_queue_purge(&sdata->skb_queue);
836 * Free all remaining keys, there shouldn't be any,
837 * except maybe group keys in AP more or WDS?
839 ieee80211_free_keys(sdata);
841 drv_remove_interface_debugfs(local, sdata);
844 drv_remove_interface(local, sdata);
849 ieee80211_recalc_ps(local, -1);
851 if (local->open_count == 0) {
852 if (local->ops->napi_poll)
853 napi_disable(&local->napi);
854 ieee80211_clear_tx_pending(local);
855 ieee80211_stop_device(local);
857 /* no reconfiguring after stop! */
861 /* do after stop to avoid reconfiguring when we stop anyway */
863 ieee80211_hw_config(local, hw_reconf_flags);
865 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
866 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
867 skb_queue_walk_safe(&local->pending[i], skb, tmp) {
868 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
869 if (info->control.vif == &sdata->vif) {
870 __skb_unlink(skb, &local->pending[i]);
871 ieee80211_free_txskb(&local->hw, skb);
875 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
877 if (local->monitors == local->open_count && local->monitors > 0)
878 ieee80211_add_virtual_monitor(local);
881 static int ieee80211_stop(struct net_device *dev)
883 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
885 ieee80211_do_stop(sdata, true);
890 static void ieee80211_set_multicast_list(struct net_device *dev)
892 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
893 struct ieee80211_local *local = sdata->local;
894 int allmulti, promisc, sdata_allmulti, sdata_promisc;
896 allmulti = !!(dev->flags & IFF_ALLMULTI);
897 promisc = !!(dev->flags & IFF_PROMISC);
898 sdata_allmulti = !!(sdata->flags & IEEE80211_SDATA_ALLMULTI);
899 sdata_promisc = !!(sdata->flags & IEEE80211_SDATA_PROMISC);
901 if (allmulti != sdata_allmulti) {
902 if (dev->flags & IFF_ALLMULTI)
903 atomic_inc(&local->iff_allmultis);
905 atomic_dec(&local->iff_allmultis);
906 sdata->flags ^= IEEE80211_SDATA_ALLMULTI;
909 if (promisc != sdata_promisc) {
910 if (dev->flags & IFF_PROMISC)
911 atomic_inc(&local->iff_promiscs);
913 atomic_dec(&local->iff_promiscs);
914 sdata->flags ^= IEEE80211_SDATA_PROMISC;
916 spin_lock_bh(&local->filter_lock);
917 __hw_addr_sync(&local->mc_list, &dev->mc, dev->addr_len);
918 spin_unlock_bh(&local->filter_lock);
919 ieee80211_queue_work(&local->hw, &local->reconfig_filter);
923 * Called when the netdev is removed or, by the code below, before
924 * the interface type changes.
926 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data *sdata)
931 /* free extra data */
932 ieee80211_free_keys(sdata);
934 ieee80211_debugfs_remove_netdev(sdata);
936 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
937 __skb_queue_purge(&sdata->fragments[i].skb_list);
938 sdata->fragment_next = 0;
940 if (ieee80211_vif_is_mesh(&sdata->vif))
941 mesh_rmc_free(sdata);
943 flushed = sta_info_flush(sdata);
947 static void ieee80211_uninit(struct net_device *dev)
949 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev));
952 static u16 ieee80211_netdev_select_queue(struct net_device *dev,
955 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev), skb);
958 static const struct net_device_ops ieee80211_dataif_ops = {
959 .ndo_open = ieee80211_open,
960 .ndo_stop = ieee80211_stop,
961 .ndo_uninit = ieee80211_uninit,
962 .ndo_start_xmit = ieee80211_subif_start_xmit,
963 .ndo_set_rx_mode = ieee80211_set_multicast_list,
964 .ndo_change_mtu = ieee80211_change_mtu,
965 .ndo_set_mac_address = ieee80211_change_mac,
966 .ndo_select_queue = ieee80211_netdev_select_queue,
969 static u16 ieee80211_monitor_select_queue(struct net_device *dev,
972 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
973 struct ieee80211_local *local = sdata->local;
974 struct ieee80211_hdr *hdr;
975 struct ieee80211_radiotap_header *rtap = (void *)skb->data;
977 if (local->hw.queues < IEEE80211_NUM_ACS)
981 skb->len < le16_to_cpu(rtap->it_len) + 2 /* frame control */)
982 return 0; /* doesn't matter, frame will be dropped */
984 hdr = (void *)((u8 *)skb->data + le16_to_cpu(rtap->it_len));
986 return ieee80211_select_queue_80211(sdata, skb, hdr);
989 static const struct net_device_ops ieee80211_monitorif_ops = {
990 .ndo_open = ieee80211_open,
991 .ndo_stop = ieee80211_stop,
992 .ndo_uninit = ieee80211_uninit,
993 .ndo_start_xmit = ieee80211_monitor_start_xmit,
994 .ndo_set_rx_mode = ieee80211_set_multicast_list,
995 .ndo_change_mtu = ieee80211_change_mtu,
996 .ndo_set_mac_address = eth_mac_addr,
997 .ndo_select_queue = ieee80211_monitor_select_queue,
1000 static void ieee80211_if_setup(struct net_device *dev)
1003 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1004 dev->netdev_ops = &ieee80211_dataif_ops;
1005 dev->destructor = free_netdev;
1008 static void ieee80211_iface_work(struct work_struct *work)
1010 struct ieee80211_sub_if_data *sdata =
1011 container_of(work, struct ieee80211_sub_if_data, work);
1012 struct ieee80211_local *local = sdata->local;
1013 struct sk_buff *skb;
1014 struct sta_info *sta;
1015 struct ieee80211_ra_tid *ra_tid;
1017 if (!ieee80211_sdata_running(sdata))
1020 if (local->scanning)
1024 * ieee80211_queue_work() should have picked up most cases,
1025 * here we'll pick the rest.
1027 if (WARN(local->suspended,
1028 "interface work scheduled while going to suspend\n"))
1031 /* first process frames */
1032 while ((skb = skb_dequeue(&sdata->skb_queue))) {
1033 struct ieee80211_mgmt *mgmt = (void *)skb->data;
1035 if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_START) {
1036 ra_tid = (void *)&skb->cb;
1037 ieee80211_start_tx_ba_cb(&sdata->vif, ra_tid->ra,
1039 } else if (skb->pkt_type == IEEE80211_SDATA_QUEUE_AGG_STOP) {
1040 ra_tid = (void *)&skb->cb;
1041 ieee80211_stop_tx_ba_cb(&sdata->vif, ra_tid->ra,
1043 } else if (ieee80211_is_action(mgmt->frame_control) &&
1044 mgmt->u.action.category == WLAN_CATEGORY_BACK) {
1047 mutex_lock(&local->sta_mtx);
1048 sta = sta_info_get_bss(sdata, mgmt->sa);
1050 switch (mgmt->u.action.u.addba_req.action_code) {
1051 case WLAN_ACTION_ADDBA_REQ:
1052 ieee80211_process_addba_request(
1053 local, sta, mgmt, len);
1055 case WLAN_ACTION_ADDBA_RESP:
1056 ieee80211_process_addba_resp(local, sta,
1059 case WLAN_ACTION_DELBA:
1060 ieee80211_process_delba(sdata, sta,
1068 mutex_unlock(&local->sta_mtx);
1069 } else if (ieee80211_is_data_qos(mgmt->frame_control)) {
1070 struct ieee80211_hdr *hdr = (void *)mgmt;
1072 * So the frame isn't mgmt, but frame_control
1073 * is at the right place anyway, of course, so
1074 * the if statement is correct.
1076 * Warn if we have other data frame types here,
1077 * they must not get here.
1079 WARN_ON(hdr->frame_control &
1080 cpu_to_le16(IEEE80211_STYPE_NULLFUNC));
1081 WARN_ON(!(hdr->seq_ctrl &
1082 cpu_to_le16(IEEE80211_SCTL_FRAG)));
1084 * This was a fragment of a frame, received while
1085 * a block-ack session was active. That cannot be
1086 * right, so terminate the session.
1088 mutex_lock(&local->sta_mtx);
1089 sta = sta_info_get_bss(sdata, mgmt->sa);
1091 u16 tid = *ieee80211_get_qos_ctl(hdr) &
1092 IEEE80211_QOS_CTL_TID_MASK;
1094 __ieee80211_stop_rx_ba_session(
1095 sta, tid, WLAN_BACK_RECIPIENT,
1096 WLAN_REASON_QSTA_REQUIRE_SETUP,
1099 mutex_unlock(&local->sta_mtx);
1100 } else switch (sdata->vif.type) {
1101 case NL80211_IFTYPE_STATION:
1102 ieee80211_sta_rx_queued_mgmt(sdata, skb);
1104 case NL80211_IFTYPE_ADHOC:
1105 ieee80211_ibss_rx_queued_mgmt(sdata, skb);
1107 case NL80211_IFTYPE_MESH_POINT:
1108 if (!ieee80211_vif_is_mesh(&sdata->vif))
1110 ieee80211_mesh_rx_queued_mgmt(sdata, skb);
1113 WARN(1, "frame for unexpected interface type");
1120 /* then other type-dependent work */
1121 switch (sdata->vif.type) {
1122 case NL80211_IFTYPE_STATION:
1123 ieee80211_sta_work(sdata);
1125 case NL80211_IFTYPE_ADHOC:
1126 ieee80211_ibss_work(sdata);
1128 case NL80211_IFTYPE_MESH_POINT:
1129 if (!ieee80211_vif_is_mesh(&sdata->vif))
1131 ieee80211_mesh_work(sdata);
1138 static void ieee80211_recalc_smps_work(struct work_struct *work)
1140 struct ieee80211_sub_if_data *sdata =
1141 container_of(work, struct ieee80211_sub_if_data, recalc_smps);
1143 ieee80211_recalc_smps(sdata);
1147 * Helper function to initialise an interface to a specific type.
1149 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data *sdata,
1150 enum nl80211_iftype type)
1152 /* clear type-dependent union */
1153 memset(&sdata->u, 0, sizeof(sdata->u));
1155 /* and set some type-dependent values */
1156 sdata->vif.type = type;
1157 sdata->vif.p2p = false;
1158 sdata->wdev.iftype = type;
1160 sdata->control_port_protocol = cpu_to_be16(ETH_P_PAE);
1161 sdata->control_port_no_encrypt = false;
1163 sdata->noack_map = 0;
1165 /* only monitor/p2p-device differ */
1167 sdata->dev->netdev_ops = &ieee80211_dataif_ops;
1168 sdata->dev->type = ARPHRD_ETHER;
1171 skb_queue_head_init(&sdata->skb_queue);
1172 INIT_WORK(&sdata->work, ieee80211_iface_work);
1173 INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
1176 case NL80211_IFTYPE_P2P_GO:
1177 type = NL80211_IFTYPE_AP;
1178 sdata->vif.type = type;
1179 sdata->vif.p2p = true;
1181 case NL80211_IFTYPE_AP:
1182 skb_queue_head_init(&sdata->u.ap.ps.bc_buf);
1183 INIT_LIST_HEAD(&sdata->u.ap.vlans);
1184 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1186 case NL80211_IFTYPE_P2P_CLIENT:
1187 type = NL80211_IFTYPE_STATION;
1188 sdata->vif.type = type;
1189 sdata->vif.p2p = true;
1191 case NL80211_IFTYPE_STATION:
1192 sdata->vif.bss_conf.bssid = sdata->u.mgd.bssid;
1193 ieee80211_sta_setup_sdata(sdata);
1195 case NL80211_IFTYPE_ADHOC:
1196 sdata->vif.bss_conf.bssid = sdata->u.ibss.bssid;
1197 ieee80211_ibss_setup_sdata(sdata);
1199 case NL80211_IFTYPE_MESH_POINT:
1200 if (ieee80211_vif_is_mesh(&sdata->vif))
1201 ieee80211_mesh_init_sdata(sdata);
1203 case NL80211_IFTYPE_MONITOR:
1204 sdata->dev->type = ARPHRD_IEEE80211_RADIOTAP;
1205 sdata->dev->netdev_ops = &ieee80211_monitorif_ops;
1206 sdata->u.mntr_flags = MONITOR_FLAG_CONTROL |
1207 MONITOR_FLAG_OTHER_BSS;
1209 case NL80211_IFTYPE_WDS:
1210 sdata->vif.bss_conf.bssid = NULL;
1212 case NL80211_IFTYPE_AP_VLAN:
1214 case NL80211_IFTYPE_P2P_DEVICE:
1215 sdata->vif.bss_conf.bssid = sdata->vif.addr;
1217 case NL80211_IFTYPE_UNSPECIFIED:
1218 case NUM_NL80211_IFTYPES:
1223 ieee80211_debugfs_add_netdev(sdata);
1226 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data *sdata,
1227 enum nl80211_iftype type)
1229 struct ieee80211_local *local = sdata->local;
1231 enum nl80211_iftype internal_type = type;
1236 if (!local->ops->change_interface)
1239 switch (sdata->vif.type) {
1240 case NL80211_IFTYPE_AP:
1241 case NL80211_IFTYPE_STATION:
1242 case NL80211_IFTYPE_ADHOC:
1244 * Could maybe also all others here?
1245 * Just not sure how that interacts
1246 * with the RX/config path e.g. for
1255 case NL80211_IFTYPE_AP:
1256 case NL80211_IFTYPE_STATION:
1257 case NL80211_IFTYPE_ADHOC:
1259 * Could probably support everything
1260 * but WDS here (WDS do_open can fail
1261 * under memory pressure, which this
1262 * code isn't prepared to handle).
1265 case NL80211_IFTYPE_P2P_CLIENT:
1267 internal_type = NL80211_IFTYPE_STATION;
1269 case NL80211_IFTYPE_P2P_GO:
1271 internal_type = NL80211_IFTYPE_AP;
1277 ret = ieee80211_check_concurrent_iface(sdata, internal_type);
1281 ieee80211_do_stop(sdata, false);
1283 ieee80211_teardown_sdata(sdata);
1285 ret = drv_change_interface(local, sdata, internal_type, p2p);
1287 type = sdata->vif.type;
1290 * Ignore return value here, there's not much we can do since
1291 * the driver changed the interface type internally already.
1292 * The warnings will hopefully make driver authors fix it :-)
1294 ieee80211_check_queues(sdata);
1296 ieee80211_setup_sdata(sdata, type);
1298 err = ieee80211_do_open(&sdata->wdev, false);
1299 WARN(err, "type change: do_open returned %d", err);
1304 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1305 enum nl80211_iftype type)
1311 if (type == ieee80211_vif_type_p2p(&sdata->vif))
1314 if (ieee80211_sdata_running(sdata)) {
1315 ret = ieee80211_runtime_change_iftype(sdata, type);
1319 /* Purge and reset type-dependent state. */
1320 ieee80211_teardown_sdata(sdata);
1321 ieee80211_setup_sdata(sdata, type);
1324 /* reset some values that shouldn't be kept across type changes */
1325 sdata->drop_unencrypted = 0;
1326 if (type == NL80211_IFTYPE_STATION)
1327 sdata->u.mgd.use_4addr = false;
1332 static void ieee80211_assign_perm_addr(struct ieee80211_local *local,
1333 u8 *perm_addr, enum nl80211_iftype type)
1335 struct ieee80211_sub_if_data *sdata;
1336 u64 mask, start, addr, val, inc;
1338 u8 tmp_addr[ETH_ALEN];
1341 /* default ... something at least */
1342 memcpy(perm_addr, local->hw.wiphy->perm_addr, ETH_ALEN);
1344 if (is_zero_ether_addr(local->hw.wiphy->addr_mask) &&
1345 local->hw.wiphy->n_addresses <= 1)
1348 mutex_lock(&local->iflist_mtx);
1351 case NL80211_IFTYPE_MONITOR:
1352 /* doesn't matter */
1354 case NL80211_IFTYPE_WDS:
1355 case NL80211_IFTYPE_AP_VLAN:
1356 /* match up with an AP interface */
1357 list_for_each_entry(sdata, &local->interfaces, list) {
1358 if (sdata->vif.type != NL80211_IFTYPE_AP)
1360 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1363 /* keep default if no AP interface present */
1365 case NL80211_IFTYPE_P2P_CLIENT:
1366 case NL80211_IFTYPE_P2P_GO:
1367 if (local->hw.flags & IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF) {
1368 list_for_each_entry(sdata, &local->interfaces, list) {
1369 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE)
1371 if (!ieee80211_sdata_running(sdata))
1373 memcpy(perm_addr, sdata->vif.addr, ETH_ALEN);
1377 /* otherwise fall through */
1379 /* assign a new address if possible -- try n_addresses first */
1380 for (i = 0; i < local->hw.wiphy->n_addresses; i++) {
1383 list_for_each_entry(sdata, &local->interfaces, list) {
1384 if (memcmp(local->hw.wiphy->addresses[i].addr,
1385 sdata->vif.addr, ETH_ALEN) == 0) {
1393 local->hw.wiphy->addresses[i].addr,
1399 /* try mask if available */
1400 if (is_zero_ether_addr(local->hw.wiphy->addr_mask))
1403 m = local->hw.wiphy->addr_mask;
1404 mask = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1405 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1406 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1408 if (__ffs64(mask) + hweight64(mask) != fls64(mask)) {
1409 /* not a contiguous mask ... not handled now! */
1410 pr_info("not contiguous\n");
1414 m = local->hw.wiphy->perm_addr;
1415 start = ((u64)m[0] << 5*8) | ((u64)m[1] << 4*8) |
1416 ((u64)m[2] << 3*8) | ((u64)m[3] << 2*8) |
1417 ((u64)m[4] << 1*8) | ((u64)m[5] << 0*8);
1419 inc = 1ULL<<__ffs64(mask);
1420 val = (start & mask);
1421 addr = (start & ~mask) | (val & mask);
1425 tmp_addr[5] = addr >> 0*8;
1426 tmp_addr[4] = addr >> 1*8;
1427 tmp_addr[3] = addr >> 2*8;
1428 tmp_addr[2] = addr >> 3*8;
1429 tmp_addr[1] = addr >> 4*8;
1430 tmp_addr[0] = addr >> 5*8;
1434 list_for_each_entry(sdata, &local->interfaces, list) {
1435 if (memcmp(tmp_addr, sdata->vif.addr,
1443 memcpy(perm_addr, tmp_addr, ETH_ALEN);
1446 addr = (start & ~mask) | (val & mask);
1447 } while (addr != start);
1453 mutex_unlock(&local->iflist_mtx);
1456 static void ieee80211_cleanup_sdata_stas_wk(struct work_struct *wk)
1458 struct ieee80211_sub_if_data *sdata;
1460 sdata = container_of(wk, struct ieee80211_sub_if_data, cleanup_stations_wk);
1462 ieee80211_cleanup_sdata_stas(sdata);
1465 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1466 struct wireless_dev **new_wdev, enum nl80211_iftype type,
1467 struct vif_params *params)
1469 struct net_device *ndev = NULL;
1470 struct ieee80211_sub_if_data *sdata = NULL;
1476 if (type == NL80211_IFTYPE_P2P_DEVICE) {
1477 struct wireless_dev *wdev;
1479 sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size,
1483 wdev = &sdata->wdev;
1486 strlcpy(sdata->name, name, IFNAMSIZ);
1487 ieee80211_assign_perm_addr(local, wdev->address, type);
1488 memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
1490 if (local->hw.queues >= IEEE80211_NUM_ACS)
1491 txqs = IEEE80211_NUM_ACS;
1493 ndev = alloc_netdev_mqs(sizeof(*sdata) +
1494 local->hw.vif_data_size,
1495 name, ieee80211_if_setup, txqs, 1);
1498 dev_net_set(ndev, wiphy_net(local->hw.wiphy));
1500 ndev->needed_headroom = local->tx_headroom +
1501 4*6 /* four MAC addresses */
1502 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1504 + 8 /* rfc1042/bridge tunnel */
1505 - ETH_HLEN /* ethernet hard_header_len */
1506 + IEEE80211_ENCRYPT_HEADROOM;
1507 ndev->needed_tailroom = IEEE80211_ENCRYPT_TAILROOM;
1509 ret = dev_alloc_name(ndev, ndev->name);
1515 ieee80211_assign_perm_addr(local, ndev->perm_addr, type);
1516 memcpy(ndev->dev_addr, ndev->perm_addr, ETH_ALEN);
1517 SET_NETDEV_DEV(ndev, wiphy_dev(local->hw.wiphy));
1519 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1520 sdata = netdev_priv(ndev);
1521 ndev->ieee80211_ptr = &sdata->wdev;
1522 memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
1523 memcpy(sdata->name, ndev->name, IFNAMSIZ);
1528 /* initialise type-independent data */
1529 sdata->wdev.wiphy = local->hw.wiphy;
1530 sdata->local = local;
1532 for (i = 0; i < IEEE80211_FRAGMENT_MAX; i++)
1533 skb_queue_head_init(&sdata->fragments[i].skb_list);
1535 INIT_LIST_HEAD(&sdata->key_list);
1537 spin_lock_init(&sdata->cleanup_stations_lock);
1538 INIT_LIST_HEAD(&sdata->cleanup_stations);
1539 INIT_WORK(&sdata->cleanup_stations_wk, ieee80211_cleanup_sdata_stas_wk);
1540 INIT_DELAYED_WORK(&sdata->dfs_cac_timer_work,
1541 ieee80211_dfs_cac_timer_work);
1543 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1544 struct ieee80211_supported_band *sband;
1545 sband = local->hw.wiphy->bands[i];
1546 sdata->rc_rateidx_mask[i] =
1547 sband ? (1 << sband->n_bitrates) - 1 : 0;
1549 memcpy(sdata->rc_rateidx_mcs_mask[i],
1550 sband->ht_cap.mcs.rx_mask,
1551 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1553 memset(sdata->rc_rateidx_mcs_mask[i], 0,
1554 sizeof(sdata->rc_rateidx_mcs_mask[i]));
1557 ieee80211_set_default_queues(sdata);
1559 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1560 sdata->user_power_level = local->user_power_level;
1562 /* setup type-dependent data */
1563 ieee80211_setup_sdata(sdata, type);
1567 ndev->ieee80211_ptr->use_4addr = params->use_4addr;
1568 if (type == NL80211_IFTYPE_STATION)
1569 sdata->u.mgd.use_4addr = params->use_4addr;
1572 ndev->features |= local->hw.netdev_features;
1574 ret = register_netdevice(ndev);
1581 mutex_lock(&local->iflist_mtx);
1582 list_add_tail_rcu(&sdata->list, &local->interfaces);
1583 mutex_unlock(&local->iflist_mtx);
1586 *new_wdev = &sdata->wdev;
1591 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata)
1595 mutex_lock(&sdata->local->iflist_mtx);
1596 list_del_rcu(&sdata->list);
1597 mutex_unlock(&sdata->local->iflist_mtx);
1602 unregister_netdevice(sdata->dev);
1604 cfg80211_unregister_wdev(&sdata->wdev);
1609 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata)
1611 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING, &sdata->state)))
1613 ieee80211_do_stop(sdata, true);
1614 ieee80211_teardown_sdata(sdata);
1618 * Remove all interfaces, may only be called at hardware unregistration
1619 * time because it doesn't do RCU-safe list removals.
1621 void ieee80211_remove_interfaces(struct ieee80211_local *local)
1623 struct ieee80211_sub_if_data *sdata, *tmp;
1624 LIST_HEAD(unreg_list);
1625 LIST_HEAD(wdev_list);
1629 mutex_lock(&local->iflist_mtx);
1630 list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) {
1631 list_del(&sdata->list);
1634 unregister_netdevice_queue(sdata->dev, &unreg_list);
1636 list_add(&sdata->list, &wdev_list);
1638 mutex_unlock(&local->iflist_mtx);
1639 unregister_netdevice_many(&unreg_list);
1640 list_del(&unreg_list);
1642 list_for_each_entry_safe(sdata, tmp, &wdev_list, list) {
1643 list_del(&sdata->list);
1644 cfg80211_unregister_wdev(&sdata->wdev);
1649 static int netdev_notify(struct notifier_block *nb,
1650 unsigned long state,
1653 struct net_device *dev = ndev;
1654 struct ieee80211_sub_if_data *sdata;
1656 if (state != NETDEV_CHANGENAME)
1659 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
1662 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
1665 sdata = IEEE80211_DEV_TO_SUB_IF(dev);
1667 memcpy(sdata->name, dev->name, IFNAMSIZ);
1669 ieee80211_debugfs_rename_netdev(sdata);
1673 static struct notifier_block mac80211_netdev_notifier = {
1674 .notifier_call = netdev_notify,
1677 int ieee80211_iface_init(void)
1679 return register_netdevice_notifier(&mac80211_netdev_notifier);
1682 void ieee80211_iface_exit(void)
1684 unregister_netdevice_notifier(&mac80211_netdev_notifier);