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
,
84 if (!(local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
))
87 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_IDLE
;
88 return IEEE80211_CONF_CHANGE_IDLE
;
91 static u32
ieee80211_idle_on(struct ieee80211_local
*local
)
93 if (local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
)
96 drv_flush(local
, false);
98 local
->hw
.conf
.flags
|= IEEE80211_CONF_IDLE
;
99 return IEEE80211_CONF_CHANGE_IDLE
;
102 static u32
__ieee80211_recalc_idle(struct ieee80211_local
*local
)
104 struct ieee80211_sub_if_data
*sdata
;
106 bool working
= false, scanning
= false;
107 unsigned int led_trig_start
= 0, led_trig_stop
= 0;
108 struct ieee80211_roc_work
*roc
;
110 #ifdef CONFIG_PROVE_LOCKING
111 WARN_ON(debug_locks
&& !lockdep_rtnl_is_held() &&
112 !lockdep_is_held(&local
->iflist_mtx
));
114 lockdep_assert_held(&local
->mtx
);
116 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
117 if (!ieee80211_sdata_running(sdata
)) {
118 sdata
->vif
.bss_conf
.idle
= true;
122 sdata
->old_idle
= sdata
->vif
.bss_conf
.idle
;
124 /* do not count disabled managed interfaces */
125 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
&&
126 !sdata
->u
.mgd
.associated
&&
127 !sdata
->u
.mgd
.auth_data
&&
128 !sdata
->u
.mgd
.assoc_data
) {
129 sdata
->vif
.bss_conf
.idle
= true;
132 /* do not count unused IBSS interfaces */
133 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
&&
134 !sdata
->u
.ibss
.ssid_len
) {
135 sdata
->vif
.bss_conf
.idle
= true;
139 if (sdata
->vif
.type
== NL80211_IFTYPE_P2P_DEVICE
)
142 /* count everything else */
143 sdata
->vif
.bss_conf
.idle
= false;
147 if (!local
->ops
->remain_on_channel
) {
148 list_for_each_entry(roc
, &local
->roc_list
, list
) {
150 roc
->sdata
->vif
.bss_conf
.idle
= false;
154 sdata
= rcu_dereference_protected(local
->scan_sdata
,
155 lockdep_is_held(&local
->mtx
));
156 if (sdata
&& !(local
->hw
.flags
& IEEE80211_HW_SCAN_WHILE_IDLE
)) {
158 sdata
->vif
.bss_conf
.idle
= false;
161 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
162 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
163 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
||
164 sdata
->vif
.type
== NL80211_IFTYPE_P2P_DEVICE
)
166 if (sdata
->old_idle
== sdata
->vif
.bss_conf
.idle
)
168 if (!ieee80211_sdata_running(sdata
))
170 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_IDLE
);
173 if (working
|| scanning
)
174 led_trig_start
|= IEEE80211_TPT_LEDTRIG_FL_WORK
;
176 led_trig_stop
|= IEEE80211_TPT_LEDTRIG_FL_WORK
;
179 led_trig_start
|= IEEE80211_TPT_LEDTRIG_FL_CONNECTED
;
181 led_trig_stop
|= IEEE80211_TPT_LEDTRIG_FL_CONNECTED
;
183 ieee80211_mod_tpt_led_trig(local
, led_trig_start
, led_trig_stop
);
186 return ieee80211_idle_off(local
, "working");
188 return ieee80211_idle_off(local
, "scanning");
190 return ieee80211_idle_on(local
);
192 return ieee80211_idle_off(local
, "in use");
197 void ieee80211_recalc_idle(struct ieee80211_local
*local
)
201 mutex_lock(&local
->iflist_mtx
);
202 chg
= __ieee80211_recalc_idle(local
);
203 mutex_unlock(&local
->iflist_mtx
);
205 ieee80211_hw_config(local
, chg
);
208 static int ieee80211_change_mtu(struct net_device
*dev
, int new_mtu
)
211 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
213 meshhdrlen
= (sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
) ? 5 : 0;
215 /* FIX: what would be proper limits for MTU?
216 * This interface uses 802.3 frames. */
218 new_mtu
> IEEE80211_MAX_DATA_LEN
- 24 - 6 - meshhdrlen
) {
226 static int ieee80211_change_mac(struct net_device
*dev
, void *addr
)
228 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
229 struct sockaddr
*sa
= addr
;
232 if (ieee80211_sdata_running(sdata
))
235 ret
= eth_mac_addr(dev
, sa
);
238 memcpy(sdata
->vif
.addr
, sa
->sa_data
, ETH_ALEN
);
243 static inline int identical_mac_addr_allowed(int type1
, int type2
)
245 return type1
== NL80211_IFTYPE_MONITOR
||
246 type2
== NL80211_IFTYPE_MONITOR
||
247 type1
== NL80211_IFTYPE_P2P_DEVICE
||
248 type2
== NL80211_IFTYPE_P2P_DEVICE
||
249 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_WDS
) ||
250 (type1
== NL80211_IFTYPE_WDS
&&
251 (type2
== NL80211_IFTYPE_WDS
||
252 type2
== NL80211_IFTYPE_AP
)) ||
253 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_AP_VLAN
) ||
254 (type1
== NL80211_IFTYPE_AP_VLAN
&&
255 (type2
== NL80211_IFTYPE_AP
||
256 type2
== NL80211_IFTYPE_AP_VLAN
));
259 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data
*sdata
,
260 enum nl80211_iftype iftype
)
262 struct ieee80211_local
*local
= sdata
->local
;
263 struct ieee80211_sub_if_data
*nsdata
;
267 /* we hold the RTNL here so can safely walk the list */
268 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
269 if (nsdata
!= sdata
&& ieee80211_sdata_running(nsdata
)) {
271 * Allow only a single IBSS interface to be up at any
272 * time. This is restricted because beacon distribution
273 * cannot work properly if both are in the same IBSS.
275 * To remove this restriction we'd have to disallow them
276 * from setting the same SSID on different IBSS interfaces
277 * belonging to the same hardware. Then, however, we're
278 * faced with having to adopt two different TSF timers...
280 if (iftype
== NL80211_IFTYPE_ADHOC
&&
281 nsdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
285 * The remaining checks are only performed for interfaces
286 * with the same MAC address.
288 if (!ether_addr_equal(sdata
->vif
.addr
,
293 * check whether it may have the same address
295 if (!identical_mac_addr_allowed(iftype
,
300 * can only add VLANs to enabled APs
302 if (iftype
== NL80211_IFTYPE_AP_VLAN
&&
303 nsdata
->vif
.type
== NL80211_IFTYPE_AP
)
304 sdata
->bss
= &nsdata
->u
.ap
;
311 static int ieee80211_check_queues(struct ieee80211_sub_if_data
*sdata
)
313 int n_queues
= sdata
->local
->hw
.queues
;
316 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
) {
317 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
318 if (WARN_ON_ONCE(sdata
->vif
.hw_queue
[i
] ==
319 IEEE80211_INVAL_HW_QUEUE
))
321 if (WARN_ON_ONCE(sdata
->vif
.hw_queue
[i
] >=
327 if ((sdata
->vif
.type
!= NL80211_IFTYPE_AP
) ||
328 !(sdata
->local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)) {
329 sdata
->vif
.cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
333 if (WARN_ON_ONCE(sdata
->vif
.cab_queue
== IEEE80211_INVAL_HW_QUEUE
))
336 if (WARN_ON_ONCE(sdata
->vif
.cab_queue
>= n_queues
))
342 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data
*sdata
,
345 struct ieee80211_local
*local
= sdata
->local
;
346 u32 flags
= sdata
->u
.mntr_flags
;
348 #define ADJUST(_f, _s) do { \
349 if (flags & MONITOR_FLAG_##_f) \
350 local->fif_##_s += offset; \
353 ADJUST(FCSFAIL
, fcsfail
);
354 ADJUST(PLCPFAIL
, plcpfail
);
355 ADJUST(CONTROL
, control
);
356 ADJUST(CONTROL
, pspoll
);
357 ADJUST(OTHER_BSS
, other_bss
);
362 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data
*sdata
)
364 struct ieee80211_local
*local
= sdata
->local
;
367 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
368 if (local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)
369 sdata
->vif
.hw_queue
[i
] = IEEE80211_INVAL_HW_QUEUE
;
370 else if (local
->hw
.queues
>= IEEE80211_NUM_ACS
)
371 sdata
->vif
.hw_queue
[i
] = i
;
373 sdata
->vif
.hw_queue
[i
] = 0;
375 sdata
->vif
.cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
378 static int ieee80211_add_virtual_monitor(struct ieee80211_local
*local
)
380 struct ieee80211_sub_if_data
*sdata
;
383 if (!(local
->hw
.flags
& IEEE80211_HW_WANT_MONITOR_VIF
))
386 mutex_lock(&local
->iflist_mtx
);
388 if (local
->monitor_sdata
)
391 sdata
= kzalloc(sizeof(*sdata
) + local
->hw
.vif_data_size
, GFP_KERNEL
);
398 sdata
->local
= local
;
399 sdata
->vif
.type
= NL80211_IFTYPE_MONITOR
;
400 snprintf(sdata
->name
, IFNAMSIZ
, "%s-monitor",
401 wiphy_name(local
->hw
.wiphy
));
403 ieee80211_set_default_queues(sdata
);
405 ret
= drv_add_interface(local
, sdata
);
407 /* ok .. stupid driver, it asked for this! */
412 ret
= ieee80211_check_queues(sdata
);
418 ret
= ieee80211_vif_use_channel(sdata
, &local
->monitor_chandef
,
419 IEEE80211_CHANCTX_EXCLUSIVE
);
421 drv_remove_interface(local
, sdata
);
426 rcu_assign_pointer(local
->monitor_sdata
, sdata
);
428 mutex_unlock(&local
->iflist_mtx
);
432 static void ieee80211_del_virtual_monitor(struct ieee80211_local
*local
)
434 struct ieee80211_sub_if_data
*sdata
;
436 if (!(local
->hw
.flags
& IEEE80211_HW_WANT_MONITOR_VIF
))
439 mutex_lock(&local
->iflist_mtx
);
441 sdata
= rcu_dereference_protected(local
->monitor_sdata
,
442 lockdep_is_held(&local
->iflist_mtx
));
446 rcu_assign_pointer(local
->monitor_sdata
, NULL
);
449 ieee80211_vif_release_channel(sdata
);
451 drv_remove_interface(local
, sdata
);
455 mutex_unlock(&local
->iflist_mtx
);
459 * NOTE: Be very careful when changing this function, it must NOT return
460 * an error on interface type changes that have been pre-checked, so most
461 * checks should be in ieee80211_check_concurrent_iface.
463 int ieee80211_do_open(struct wireless_dev
*wdev
, bool coming_up
)
465 struct ieee80211_sub_if_data
*sdata
= IEEE80211_WDEV_TO_SUB_IF(wdev
);
466 struct net_device
*dev
= wdev
->netdev
;
467 struct ieee80211_local
*local
= sdata
->local
;
468 struct sta_info
*sta
;
471 u32 hw_reconf_flags
= 0;
473 switch (sdata
->vif
.type
) {
474 case NL80211_IFTYPE_WDS
:
475 if (!is_valid_ether_addr(sdata
->u
.wds
.remote_addr
))
478 case NL80211_IFTYPE_AP_VLAN
: {
479 struct ieee80211_sub_if_data
*master
;
484 list_add(&sdata
->u
.vlan
.list
, &sdata
->bss
->vlans
);
486 master
= container_of(sdata
->bss
,
487 struct ieee80211_sub_if_data
, u
.ap
);
488 sdata
->control_port_protocol
=
489 master
->control_port_protocol
;
490 sdata
->control_port_no_encrypt
=
491 master
->control_port_no_encrypt
;
494 case NL80211_IFTYPE_AP
:
495 sdata
->bss
= &sdata
->u
.ap
;
497 case NL80211_IFTYPE_MESH_POINT
:
498 case NL80211_IFTYPE_STATION
:
499 case NL80211_IFTYPE_MONITOR
:
500 case NL80211_IFTYPE_ADHOC
:
501 case NL80211_IFTYPE_P2P_DEVICE
:
502 /* no special treatment */
504 case NL80211_IFTYPE_UNSPECIFIED
:
505 case NUM_NL80211_IFTYPES
:
506 case NL80211_IFTYPE_P2P_CLIENT
:
507 case NL80211_IFTYPE_P2P_GO
:
513 if (local
->open_count
== 0) {
514 res
= drv_start(local
);
517 if (local
->ops
->napi_poll
)
518 napi_enable(&local
->napi
);
519 /* we're brought up, everything changes */
520 hw_reconf_flags
= ~0;
521 ieee80211_led_radio(local
, true);
522 ieee80211_mod_tpt_led_trig(local
,
523 IEEE80211_TPT_LEDTRIG_FL_RADIO
, 0);
527 * Copy the hopefully now-present MAC address to
528 * this interface, if it has the special null one.
530 if (dev
&& is_zero_ether_addr(dev
->dev_addr
)) {
531 memcpy(dev
->dev_addr
,
532 local
->hw
.wiphy
->perm_addr
,
534 memcpy(dev
->perm_addr
, dev
->dev_addr
, ETH_ALEN
);
536 if (!is_valid_ether_addr(dev
->dev_addr
)) {
537 res
= -EADDRNOTAVAIL
;
542 switch (sdata
->vif
.type
) {
543 case NL80211_IFTYPE_AP_VLAN
:
544 /* no need to tell driver, but set carrier */
545 if (rtnl_dereference(sdata
->bss
->beacon
))
546 netif_carrier_on(dev
);
548 netif_carrier_off(dev
);
550 case NL80211_IFTYPE_MONITOR
:
551 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
552 local
->cooked_mntrs
++;
556 if (local
->monitors
== 0 && local
->open_count
== 0) {
557 res
= ieee80211_add_virtual_monitor(local
);
562 /* must be before the call to ieee80211_configure_filter */
564 if (local
->monitors
== 1) {
565 local
->hw
.conf
.flags
|= IEEE80211_CONF_MONITOR
;
566 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
569 ieee80211_adjust_monitor_flags(sdata
, 1);
570 ieee80211_configure_filter(local
);
572 netif_carrier_on(dev
);
576 ieee80211_del_virtual_monitor(local
);
578 res
= drv_add_interface(local
, sdata
);
581 res
= ieee80211_check_queues(sdata
);
583 goto err_del_interface
;
586 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
588 local
->fif_probe_req
++;
590 ieee80211_configure_filter(local
);
591 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
592 local
->fif_probe_req
++;
595 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
)
596 changed
|= ieee80211_reset_erp_info(sdata
);
597 ieee80211_bss_info_change_notify(sdata
, changed
);
599 switch (sdata
->vif
.type
) {
600 case NL80211_IFTYPE_STATION
:
601 case NL80211_IFTYPE_ADHOC
:
602 case NL80211_IFTYPE_AP
:
603 case NL80211_IFTYPE_MESH_POINT
:
604 netif_carrier_off(dev
);
606 case NL80211_IFTYPE_WDS
:
607 case NL80211_IFTYPE_P2P_DEVICE
:
610 netif_carrier_on(dev
);
614 * set default queue parameters so drivers don't
615 * need to initialise the hardware if the hardware
616 * doesn't start up with sane defaults
618 ieee80211_set_wmm_default(sdata
, true);
621 set_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
623 if (sdata
->vif
.type
== NL80211_IFTYPE_WDS
) {
624 /* Create STA entry for the WDS peer */
625 sta
= sta_info_alloc(sdata
, sdata
->u
.wds
.remote_addr
,
629 goto err_del_interface
;
632 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTH
);
633 sta_info_pre_move_state(sta
, IEEE80211_STA_ASSOC
);
634 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
636 res
= sta_info_insert(sta
);
638 /* STA has been freed */
639 goto err_del_interface
;
642 rate_control_rate_init(sta
);
643 netif_carrier_on(dev
);
644 } else if (sdata
->vif
.type
== NL80211_IFTYPE_P2P_DEVICE
) {
645 rcu_assign_pointer(local
->p2p_sdata
, sdata
);
649 * set_multicast_list will be invoked by the networking core
650 * which will check whether any increments here were done in
651 * error and sync them down to the hardware as filter flags.
653 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
654 atomic_inc(&local
->iff_allmultis
);
656 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
657 atomic_inc(&local
->iff_promiscs
);
659 mutex_lock(&local
->mtx
);
660 hw_reconf_flags
|= __ieee80211_recalc_idle(local
);
661 mutex_unlock(&local
->mtx
);
667 ieee80211_hw_config(local
, hw_reconf_flags
);
669 ieee80211_recalc_ps(local
, -1);
672 netif_tx_start_all_queues(dev
);
676 drv_remove_interface(local
, sdata
);
678 if (!local
->open_count
)
682 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
683 list_del(&sdata
->u
.vlan
.list
);
684 /* might already be clear but that doesn't matter */
685 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
689 static int ieee80211_open(struct net_device
*dev
)
691 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
694 /* fail early if user set an invalid address */
695 if (!is_valid_ether_addr(dev
->dev_addr
))
696 return -EADDRNOTAVAIL
;
698 err
= ieee80211_check_concurrent_iface(sdata
, sdata
->vif
.type
);
702 return ieee80211_do_open(&sdata
->wdev
, true);
705 static void ieee80211_do_stop(struct ieee80211_sub_if_data
*sdata
,
708 struct ieee80211_local
*local
= sdata
->local
;
710 struct sk_buff
*skb
, *tmp
;
711 u32 hw_reconf_flags
= 0;
714 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
716 if (rcu_access_pointer(local
->scan_sdata
) == sdata
)
717 ieee80211_scan_cancel(local
);
720 * Stop TX on this interface first.
723 netif_tx_stop_all_queues(sdata
->dev
);
725 ieee80211_roc_purge(sdata
);
728 * Remove all stations associated with this interface.
730 * This must be done before calling ops->remove_interface()
731 * because otherwise we can later invoke ops->sta_notify()
732 * whenever the STAs are removed, and that invalidates driver
733 * assumptions about always getting a vif pointer that is valid
734 * (because if we remove a STA after ops->remove_interface()
735 * the driver will have removed the vif info already!)
737 * This is relevant only in AP, WDS and mesh modes, since in
738 * all other modes we've already removed all stations when
741 sta_info_flush(local
, sdata
);
744 * Don't count this interface for promisc/allmulti while it
745 * is down. dev_mc_unsync() will invoke set_multicast_list
746 * on the master interface which will sync these down to the
747 * hardware as filter flags.
749 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
750 atomic_dec(&local
->iff_allmultis
);
752 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
753 atomic_dec(&local
->iff_promiscs
);
755 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
757 local
->fif_probe_req
--;
758 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
759 local
->fif_probe_req
--;
763 netif_addr_lock_bh(sdata
->dev
);
764 spin_lock_bh(&local
->filter_lock
);
765 __hw_addr_unsync(&local
->mc_list
, &sdata
->dev
->mc
,
766 sdata
->dev
->addr_len
);
767 spin_unlock_bh(&local
->filter_lock
);
768 netif_addr_unlock_bh(sdata
->dev
);
770 ieee80211_configure_filter(local
);
773 del_timer_sync(&local
->dynamic_ps_timer
);
774 cancel_work_sync(&local
->dynamic_ps_enable_work
);
776 cancel_work_sync(&sdata
->recalc_smps
);
778 /* APs need special treatment */
779 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
780 struct ieee80211_sub_if_data
*vlan
, *tmpsdata
;
782 /* down all dependent devices, that is VLANs */
783 list_for_each_entry_safe(vlan
, tmpsdata
, &sdata
->u
.ap
.vlans
,
785 dev_close(vlan
->dev
);
786 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
787 } else if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
788 ieee80211_mgd_stop(sdata
);
794 switch (sdata
->vif
.type
) {
795 case NL80211_IFTYPE_AP_VLAN
:
796 list_del(&sdata
->u
.vlan
.list
);
797 /* no need to tell driver */
799 case NL80211_IFTYPE_MONITOR
:
800 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
801 local
->cooked_mntrs
--;
806 if (local
->monitors
== 0) {
807 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_MONITOR
;
808 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
809 ieee80211_del_virtual_monitor(local
);
812 ieee80211_adjust_monitor_flags(sdata
, -1);
813 ieee80211_configure_filter(local
);
815 case NL80211_IFTYPE_P2P_DEVICE
:
816 /* relies on synchronize_rcu() below */
817 rcu_assign_pointer(local
->p2p_sdata
, NULL
);
820 flush_work(&sdata
->work
);
822 * When we get here, the interface is marked down.
823 * Call rcu_barrier() to wait both for the RX path
824 * should it be using the interface and enqueuing
825 * frames at this very time on another CPU, and
826 * for the sta free call_rcu callbacks.
831 * free_sta_rcu() enqueues a work for the actual
832 * sta cleanup, so we need to flush it while
833 * sdata is still valid.
835 flush_workqueue(local
->workqueue
);
837 skb_queue_purge(&sdata
->skb_queue
);
840 * Free all remaining keys, there shouldn't be any,
841 * except maybe group keys in AP more or WDS?
843 ieee80211_free_keys(sdata
);
846 drv_remove_interface(local
, sdata
);
851 mutex_lock(&local
->mtx
);
852 hw_reconf_flags
|= __ieee80211_recalc_idle(local
);
853 mutex_unlock(&local
->mtx
);
855 ieee80211_recalc_ps(local
, -1);
857 if (local
->open_count
== 0) {
858 if (local
->ops
->napi_poll
)
859 napi_disable(&local
->napi
);
860 ieee80211_clear_tx_pending(local
);
861 ieee80211_stop_device(local
);
863 /* no reconfiguring after stop! */
867 /* do after stop to avoid reconfiguring when we stop anyway */
869 ieee80211_hw_config(local
, hw_reconf_flags
);
871 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
872 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
873 skb_queue_walk_safe(&local
->pending
[i
], skb
, tmp
) {
874 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
875 if (info
->control
.vif
== &sdata
->vif
) {
876 __skb_unlink(skb
, &local
->pending
[i
]);
877 ieee80211_free_txskb(&local
->hw
, skb
);
881 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
883 if (local
->monitors
== local
->open_count
&& local
->monitors
> 0)
884 ieee80211_add_virtual_monitor(local
);
887 static int ieee80211_stop(struct net_device
*dev
)
889 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
891 ieee80211_do_stop(sdata
, true);
896 static void ieee80211_set_multicast_list(struct net_device
*dev
)
898 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
899 struct ieee80211_local
*local
= sdata
->local
;
900 int allmulti
, promisc
, sdata_allmulti
, sdata_promisc
;
902 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
903 promisc
= !!(dev
->flags
& IFF_PROMISC
);
904 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
905 sdata_promisc
= !!(sdata
->flags
& IEEE80211_SDATA_PROMISC
);
907 if (allmulti
!= sdata_allmulti
) {
908 if (dev
->flags
& IFF_ALLMULTI
)
909 atomic_inc(&local
->iff_allmultis
);
911 atomic_dec(&local
->iff_allmultis
);
912 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
915 if (promisc
!= sdata_promisc
) {
916 if (dev
->flags
& IFF_PROMISC
)
917 atomic_inc(&local
->iff_promiscs
);
919 atomic_dec(&local
->iff_promiscs
);
920 sdata
->flags
^= IEEE80211_SDATA_PROMISC
;
922 spin_lock_bh(&local
->filter_lock
);
923 __hw_addr_sync(&local
->mc_list
, &dev
->mc
, dev
->addr_len
);
924 spin_unlock_bh(&local
->filter_lock
);
925 ieee80211_queue_work(&local
->hw
, &local
->reconfig_filter
);
929 * Called when the netdev is removed or, by the code below, before
930 * the interface type changes.
932 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data
*sdata
)
934 struct ieee80211_local
*local
= sdata
->local
;
938 /* free extra data */
939 ieee80211_free_keys(sdata
);
941 ieee80211_debugfs_remove_netdev(sdata
);
943 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
944 __skb_queue_purge(&sdata
->fragments
[i
].skb_list
);
945 sdata
->fragment_next
= 0;
947 if (ieee80211_vif_is_mesh(&sdata
->vif
))
948 mesh_rmc_free(sdata
);
950 flushed
= sta_info_flush(local
, sdata
);
954 static void ieee80211_uninit(struct net_device
*dev
)
956 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev
));
959 static u16
ieee80211_netdev_select_queue(struct net_device
*dev
,
962 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev
), skb
);
965 static const struct net_device_ops ieee80211_dataif_ops
= {
966 .ndo_open
= ieee80211_open
,
967 .ndo_stop
= ieee80211_stop
,
968 .ndo_uninit
= ieee80211_uninit
,
969 .ndo_start_xmit
= ieee80211_subif_start_xmit
,
970 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
971 .ndo_change_mtu
= ieee80211_change_mtu
,
972 .ndo_set_mac_address
= ieee80211_change_mac
,
973 .ndo_select_queue
= ieee80211_netdev_select_queue
,
976 static u16
ieee80211_monitor_select_queue(struct net_device
*dev
,
979 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
980 struct ieee80211_local
*local
= sdata
->local
;
981 struct ieee80211_hdr
*hdr
;
982 struct ieee80211_radiotap_header
*rtap
= (void *)skb
->data
;
984 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
988 skb
->len
< le16_to_cpu(rtap
->it_len
) + 2 /* frame control */)
989 return 0; /* doesn't matter, frame will be dropped */
991 hdr
= (void *)((u8
*)skb
->data
+ le16_to_cpu(rtap
->it_len
));
993 return ieee80211_select_queue_80211(sdata
, skb
, hdr
);
996 static const struct net_device_ops ieee80211_monitorif_ops
= {
997 .ndo_open
= ieee80211_open
,
998 .ndo_stop
= ieee80211_stop
,
999 .ndo_uninit
= ieee80211_uninit
,
1000 .ndo_start_xmit
= ieee80211_monitor_start_xmit
,
1001 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
1002 .ndo_change_mtu
= ieee80211_change_mtu
,
1003 .ndo_set_mac_address
= eth_mac_addr
,
1004 .ndo_select_queue
= ieee80211_monitor_select_queue
,
1007 static void ieee80211_if_setup(struct net_device
*dev
)
1010 dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1011 dev
->netdev_ops
= &ieee80211_dataif_ops
;
1012 dev
->destructor
= free_netdev
;
1015 static void ieee80211_iface_work(struct work_struct
*work
)
1017 struct ieee80211_sub_if_data
*sdata
=
1018 container_of(work
, struct ieee80211_sub_if_data
, work
);
1019 struct ieee80211_local
*local
= sdata
->local
;
1020 struct sk_buff
*skb
;
1021 struct sta_info
*sta
;
1022 struct ieee80211_ra_tid
*ra_tid
;
1024 if (!ieee80211_sdata_running(sdata
))
1027 if (local
->scanning
)
1031 * ieee80211_queue_work() should have picked up most cases,
1032 * here we'll pick the rest.
1034 if (WARN(local
->suspended
,
1035 "interface work scheduled while going to suspend\n"))
1038 /* first process frames */
1039 while ((skb
= skb_dequeue(&sdata
->skb_queue
))) {
1040 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
1042 if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_START
) {
1043 ra_tid
= (void *)&skb
->cb
;
1044 ieee80211_start_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
1046 } else if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_STOP
) {
1047 ra_tid
= (void *)&skb
->cb
;
1048 ieee80211_stop_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
1050 } else if (ieee80211_is_action(mgmt
->frame_control
) &&
1051 mgmt
->u
.action
.category
== WLAN_CATEGORY_BACK
) {
1054 mutex_lock(&local
->sta_mtx
);
1055 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
1057 switch (mgmt
->u
.action
.u
.addba_req
.action_code
) {
1058 case WLAN_ACTION_ADDBA_REQ
:
1059 ieee80211_process_addba_request(
1060 local
, sta
, mgmt
, len
);
1062 case WLAN_ACTION_ADDBA_RESP
:
1063 ieee80211_process_addba_resp(local
, sta
,
1066 case WLAN_ACTION_DELBA
:
1067 ieee80211_process_delba(sdata
, sta
,
1075 mutex_unlock(&local
->sta_mtx
);
1076 } else if (ieee80211_is_data_qos(mgmt
->frame_control
)) {
1077 struct ieee80211_hdr
*hdr
= (void *)mgmt
;
1079 * So the frame isn't mgmt, but frame_control
1080 * is at the right place anyway, of course, so
1081 * the if statement is correct.
1083 * Warn if we have other data frame types here,
1084 * they must not get here.
1086 WARN_ON(hdr
->frame_control
&
1087 cpu_to_le16(IEEE80211_STYPE_NULLFUNC
));
1088 WARN_ON(!(hdr
->seq_ctrl
&
1089 cpu_to_le16(IEEE80211_SCTL_FRAG
)));
1091 * This was a fragment of a frame, received while
1092 * a block-ack session was active. That cannot be
1093 * right, so terminate the session.
1095 mutex_lock(&local
->sta_mtx
);
1096 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
1098 u16 tid
= *ieee80211_get_qos_ctl(hdr
) &
1099 IEEE80211_QOS_CTL_TID_MASK
;
1101 __ieee80211_stop_rx_ba_session(
1102 sta
, tid
, WLAN_BACK_RECIPIENT
,
1103 WLAN_REASON_QSTA_REQUIRE_SETUP
,
1106 mutex_unlock(&local
->sta_mtx
);
1107 } else switch (sdata
->vif
.type
) {
1108 case NL80211_IFTYPE_STATION
:
1109 ieee80211_sta_rx_queued_mgmt(sdata
, skb
);
1111 case NL80211_IFTYPE_ADHOC
:
1112 ieee80211_ibss_rx_queued_mgmt(sdata
, skb
);
1114 case NL80211_IFTYPE_MESH_POINT
:
1115 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
1117 ieee80211_mesh_rx_queued_mgmt(sdata
, skb
);
1120 WARN(1, "frame for unexpected interface type");
1127 /* then other type-dependent work */
1128 switch (sdata
->vif
.type
) {
1129 case NL80211_IFTYPE_STATION
:
1130 ieee80211_sta_work(sdata
);
1132 case NL80211_IFTYPE_ADHOC
:
1133 ieee80211_ibss_work(sdata
);
1135 case NL80211_IFTYPE_MESH_POINT
:
1136 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
1138 ieee80211_mesh_work(sdata
);
1145 static void ieee80211_recalc_smps_work(struct work_struct
*work
)
1147 struct ieee80211_sub_if_data
*sdata
=
1148 container_of(work
, struct ieee80211_sub_if_data
, recalc_smps
);
1150 ieee80211_recalc_smps(sdata
);
1154 * Helper function to initialise an interface to a specific type.
1156 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data
*sdata
,
1157 enum nl80211_iftype type
)
1159 /* clear type-dependent union */
1160 memset(&sdata
->u
, 0, sizeof(sdata
->u
));
1162 /* and set some type-dependent values */
1163 sdata
->vif
.type
= type
;
1164 sdata
->vif
.p2p
= false;
1165 sdata
->wdev
.iftype
= type
;
1167 sdata
->control_port_protocol
= cpu_to_be16(ETH_P_PAE
);
1168 sdata
->control_port_no_encrypt
= false;
1170 sdata
->noack_map
= 0;
1172 /* only monitor/p2p-device differ */
1174 sdata
->dev
->netdev_ops
= &ieee80211_dataif_ops
;
1175 sdata
->dev
->type
= ARPHRD_ETHER
;
1178 skb_queue_head_init(&sdata
->skb_queue
);
1179 INIT_WORK(&sdata
->work
, ieee80211_iface_work
);
1180 INIT_WORK(&sdata
->recalc_smps
, ieee80211_recalc_smps_work
);
1183 case NL80211_IFTYPE_P2P_GO
:
1184 type
= NL80211_IFTYPE_AP
;
1185 sdata
->vif
.type
= type
;
1186 sdata
->vif
.p2p
= true;
1188 case NL80211_IFTYPE_AP
:
1189 skb_queue_head_init(&sdata
->u
.ap
.ps
.bc_buf
);
1190 INIT_LIST_HEAD(&sdata
->u
.ap
.vlans
);
1192 case NL80211_IFTYPE_P2P_CLIENT
:
1193 type
= NL80211_IFTYPE_STATION
;
1194 sdata
->vif
.type
= type
;
1195 sdata
->vif
.p2p
= true;
1197 case NL80211_IFTYPE_STATION
:
1198 ieee80211_sta_setup_sdata(sdata
);
1200 case NL80211_IFTYPE_ADHOC
:
1201 ieee80211_ibss_setup_sdata(sdata
);
1203 case NL80211_IFTYPE_MESH_POINT
:
1204 if (ieee80211_vif_is_mesh(&sdata
->vif
))
1205 ieee80211_mesh_init_sdata(sdata
);
1207 case NL80211_IFTYPE_MONITOR
:
1208 sdata
->dev
->type
= ARPHRD_IEEE80211_RADIOTAP
;
1209 sdata
->dev
->netdev_ops
= &ieee80211_monitorif_ops
;
1210 sdata
->u
.mntr_flags
= MONITOR_FLAG_CONTROL
|
1211 MONITOR_FLAG_OTHER_BSS
;
1213 case NL80211_IFTYPE_WDS
:
1214 case NL80211_IFTYPE_AP_VLAN
:
1215 case NL80211_IFTYPE_P2P_DEVICE
:
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 int ieee80211_if_add(struct ieee80211_local
*local
, const char *name
,
1457 struct wireless_dev
**new_wdev
, enum nl80211_iftype type
,
1458 struct vif_params
*params
)
1460 struct net_device
*ndev
= NULL
;
1461 struct ieee80211_sub_if_data
*sdata
= NULL
;
1467 if (type
== NL80211_IFTYPE_P2P_DEVICE
) {
1468 struct wireless_dev
*wdev
;
1470 sdata
= kzalloc(sizeof(*sdata
) + local
->hw
.vif_data_size
,
1474 wdev
= &sdata
->wdev
;
1477 strlcpy(sdata
->name
, name
, IFNAMSIZ
);
1478 ieee80211_assign_perm_addr(local
, wdev
->address
, type
);
1479 memcpy(sdata
->vif
.addr
, wdev
->address
, ETH_ALEN
);
1481 if (local
->hw
.queues
>= IEEE80211_NUM_ACS
)
1482 txqs
= IEEE80211_NUM_ACS
;
1484 ndev
= alloc_netdev_mqs(sizeof(*sdata
) +
1485 local
->hw
.vif_data_size
,
1486 name
, ieee80211_if_setup
, txqs
, 1);
1489 dev_net_set(ndev
, wiphy_net(local
->hw
.wiphy
));
1491 ndev
->needed_headroom
= local
->tx_headroom
+
1492 4*6 /* four MAC addresses */
1493 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1495 + 8 /* rfc1042/bridge tunnel */
1496 - ETH_HLEN
/* ethernet hard_header_len */
1497 + IEEE80211_ENCRYPT_HEADROOM
;
1498 ndev
->needed_tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
1500 ret
= dev_alloc_name(ndev
, ndev
->name
);
1506 ieee80211_assign_perm_addr(local
, ndev
->perm_addr
, type
);
1507 memcpy(ndev
->dev_addr
, ndev
->perm_addr
, ETH_ALEN
);
1508 SET_NETDEV_DEV(ndev
, wiphy_dev(local
->hw
.wiphy
));
1510 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1511 sdata
= netdev_priv(ndev
);
1512 ndev
->ieee80211_ptr
= &sdata
->wdev
;
1513 memcpy(sdata
->vif
.addr
, ndev
->dev_addr
, ETH_ALEN
);
1514 memcpy(sdata
->name
, ndev
->name
, IFNAMSIZ
);
1519 /* initialise type-independent data */
1520 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
1521 sdata
->local
= local
;
1523 sdata
->arp_filter_state
= true;
1526 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
1527 skb_queue_head_init(&sdata
->fragments
[i
].skb_list
);
1529 INIT_LIST_HEAD(&sdata
->key_list
);
1531 for (i
= 0; i
< IEEE80211_NUM_BANDS
; i
++) {
1532 struct ieee80211_supported_band
*sband
;
1533 sband
= local
->hw
.wiphy
->bands
[i
];
1534 sdata
->rc_rateidx_mask
[i
] =
1535 sband
? (1 << sband
->n_bitrates
) - 1 : 0;
1537 memcpy(sdata
->rc_rateidx_mcs_mask
[i
],
1538 sband
->ht_cap
.mcs
.rx_mask
,
1539 sizeof(sdata
->rc_rateidx_mcs_mask
[i
]));
1541 memset(sdata
->rc_rateidx_mcs_mask
[i
], 0,
1542 sizeof(sdata
->rc_rateidx_mcs_mask
[i
]));
1545 ieee80211_set_default_queues(sdata
);
1547 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
1548 sdata
->user_power_level
= local
->user_power_level
;
1550 /* setup type-dependent data */
1551 ieee80211_setup_sdata(sdata
, type
);
1555 ndev
->ieee80211_ptr
->use_4addr
= params
->use_4addr
;
1556 if (type
== NL80211_IFTYPE_STATION
)
1557 sdata
->u
.mgd
.use_4addr
= params
->use_4addr
;
1560 ndev
->features
|= local
->hw
.netdev_features
;
1562 ret
= register_netdevice(ndev
);
1569 mutex_lock(&local
->iflist_mtx
);
1570 list_add_tail_rcu(&sdata
->list
, &local
->interfaces
);
1571 mutex_unlock(&local
->iflist_mtx
);
1574 *new_wdev
= &sdata
->wdev
;
1579 void ieee80211_if_remove(struct ieee80211_sub_if_data
*sdata
)
1583 mutex_lock(&sdata
->local
->iflist_mtx
);
1584 list_del_rcu(&sdata
->list
);
1585 mutex_unlock(&sdata
->local
->iflist_mtx
);
1590 unregister_netdevice(sdata
->dev
);
1592 cfg80211_unregister_wdev(&sdata
->wdev
);
1597 void ieee80211_sdata_stop(struct ieee80211_sub_if_data
*sdata
)
1599 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING
, &sdata
->state
)))
1601 ieee80211_do_stop(sdata
, true);
1602 ieee80211_teardown_sdata(sdata
);
1606 * Remove all interfaces, may only be called at hardware unregistration
1607 * time because it doesn't do RCU-safe list removals.
1609 void ieee80211_remove_interfaces(struct ieee80211_local
*local
)
1611 struct ieee80211_sub_if_data
*sdata
, *tmp
;
1612 LIST_HEAD(unreg_list
);
1613 LIST_HEAD(wdev_list
);
1617 mutex_lock(&local
->iflist_mtx
);
1618 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
1619 list_del(&sdata
->list
);
1622 unregister_netdevice_queue(sdata
->dev
, &unreg_list
);
1624 list_add(&sdata
->list
, &wdev_list
);
1626 mutex_unlock(&local
->iflist_mtx
);
1627 unregister_netdevice_many(&unreg_list
);
1628 list_del(&unreg_list
);
1630 list_for_each_entry_safe(sdata
, tmp
, &wdev_list
, list
) {
1631 list_del(&sdata
->list
);
1632 cfg80211_unregister_wdev(&sdata
->wdev
);
1637 static int netdev_notify(struct notifier_block
*nb
,
1638 unsigned long state
,
1641 struct net_device
*dev
= ndev
;
1642 struct ieee80211_sub_if_data
*sdata
;
1644 if (state
!= NETDEV_CHANGENAME
)
1647 if (!dev
->ieee80211_ptr
|| !dev
->ieee80211_ptr
->wiphy
)
1650 if (dev
->ieee80211_ptr
->wiphy
->privid
!= mac80211_wiphy_privid
)
1653 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1655 memcpy(sdata
->name
, dev
->name
, IFNAMSIZ
);
1657 ieee80211_debugfs_rename_netdev(sdata
);
1661 static struct notifier_block mac80211_netdev_notifier
= {
1662 .notifier_call
= netdev_notify
,
1665 int ieee80211_iface_init(void)
1667 return register_netdevice_notifier(&mac80211_netdev_notifier
);
1670 void ieee80211_iface_exit(void)
1672 unregister_netdevice_notifier(&mac80211_netdev_notifier
);