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.
46 static u32
ieee80211_idle_off(struct ieee80211_local
*local
,
49 if (!(local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
))
52 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_IDLE
;
53 return IEEE80211_CONF_CHANGE_IDLE
;
56 static u32
ieee80211_idle_on(struct ieee80211_local
*local
)
58 if (local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
)
61 drv_flush(local
, false);
63 local
->hw
.conf
.flags
|= IEEE80211_CONF_IDLE
;
64 return IEEE80211_CONF_CHANGE_IDLE
;
67 static u32
__ieee80211_recalc_idle(struct ieee80211_local
*local
)
69 struct ieee80211_sub_if_data
*sdata
;
71 bool working
= false, scanning
= false;
72 unsigned int led_trig_start
= 0, led_trig_stop
= 0;
73 struct ieee80211_roc_work
*roc
;
75 #ifdef CONFIG_PROVE_LOCKING
76 WARN_ON(debug_locks
&& !lockdep_rtnl_is_held() &&
77 !lockdep_is_held(&local
->iflist_mtx
));
79 lockdep_assert_held(&local
->mtx
);
81 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
82 if (!ieee80211_sdata_running(sdata
)) {
83 sdata
->vif
.bss_conf
.idle
= true;
87 sdata
->old_idle
= sdata
->vif
.bss_conf
.idle
;
89 /* do not count disabled managed interfaces */
90 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
&&
91 !sdata
->u
.mgd
.associated
&&
92 !sdata
->u
.mgd
.auth_data
&&
93 !sdata
->u
.mgd
.assoc_data
) {
94 sdata
->vif
.bss_conf
.idle
= true;
97 /* do not count unused IBSS interfaces */
98 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
&&
99 !sdata
->u
.ibss
.ssid_len
) {
100 sdata
->vif
.bss_conf
.idle
= true;
104 if (sdata
->vif
.type
== NL80211_IFTYPE_P2P_DEVICE
)
107 /* count everything else */
108 sdata
->vif
.bss_conf
.idle
= false;
112 if (!local
->ops
->remain_on_channel
) {
113 list_for_each_entry(roc
, &local
->roc_list
, list
) {
115 roc
->sdata
->vif
.bss_conf
.idle
= false;
119 sdata
= rcu_dereference_protected(local
->scan_sdata
,
120 lockdep_is_held(&local
->mtx
));
121 if (sdata
&& !(local
->hw
.flags
& IEEE80211_HW_SCAN_WHILE_IDLE
)) {
123 sdata
->vif
.bss_conf
.idle
= false;
126 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
127 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
128 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
||
129 sdata
->vif
.type
== NL80211_IFTYPE_P2P_DEVICE
)
131 if (sdata
->old_idle
== sdata
->vif
.bss_conf
.idle
)
133 if (!ieee80211_sdata_running(sdata
))
135 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_IDLE
);
138 if (working
|| scanning
)
139 led_trig_start
|= IEEE80211_TPT_LEDTRIG_FL_WORK
;
141 led_trig_stop
|= IEEE80211_TPT_LEDTRIG_FL_WORK
;
144 led_trig_start
|= IEEE80211_TPT_LEDTRIG_FL_CONNECTED
;
146 led_trig_stop
|= IEEE80211_TPT_LEDTRIG_FL_CONNECTED
;
148 ieee80211_mod_tpt_led_trig(local
, led_trig_start
, led_trig_stop
);
151 return ieee80211_idle_off(local
, "working");
153 return ieee80211_idle_off(local
, "scanning");
155 return ieee80211_idle_on(local
);
157 return ieee80211_idle_off(local
, "in use");
162 void ieee80211_recalc_idle(struct ieee80211_local
*local
)
166 mutex_lock(&local
->iflist_mtx
);
167 chg
= __ieee80211_recalc_idle(local
);
168 mutex_unlock(&local
->iflist_mtx
);
170 ieee80211_hw_config(local
, chg
);
173 static int ieee80211_change_mtu(struct net_device
*dev
, int new_mtu
)
176 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
178 meshhdrlen
= (sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
) ? 5 : 0;
180 /* FIX: what would be proper limits for MTU?
181 * This interface uses 802.3 frames. */
183 new_mtu
> IEEE80211_MAX_DATA_LEN
- 24 - 6 - meshhdrlen
) {
191 static int ieee80211_change_mac(struct net_device
*dev
, void *addr
)
193 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
194 struct sockaddr
*sa
= addr
;
197 if (ieee80211_sdata_running(sdata
))
200 ret
= eth_mac_addr(dev
, sa
);
203 memcpy(sdata
->vif
.addr
, sa
->sa_data
, ETH_ALEN
);
208 static inline int identical_mac_addr_allowed(int type1
, int type2
)
210 return type1
== NL80211_IFTYPE_MONITOR
||
211 type2
== NL80211_IFTYPE_MONITOR
||
212 type1
== NL80211_IFTYPE_P2P_DEVICE
||
213 type2
== NL80211_IFTYPE_P2P_DEVICE
||
214 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_WDS
) ||
215 (type1
== NL80211_IFTYPE_WDS
&&
216 (type2
== NL80211_IFTYPE_WDS
||
217 type2
== NL80211_IFTYPE_AP
)) ||
218 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_AP_VLAN
) ||
219 (type1
== NL80211_IFTYPE_AP_VLAN
&&
220 (type2
== NL80211_IFTYPE_AP
||
221 type2
== NL80211_IFTYPE_AP_VLAN
));
224 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data
*sdata
,
225 enum nl80211_iftype iftype
)
227 struct ieee80211_local
*local
= sdata
->local
;
228 struct ieee80211_sub_if_data
*nsdata
;
232 /* we hold the RTNL here so can safely walk the list */
233 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
234 if (nsdata
!= sdata
&& ieee80211_sdata_running(nsdata
)) {
236 * Allow only a single IBSS interface to be up at any
237 * time. This is restricted because beacon distribution
238 * cannot work properly if both are in the same IBSS.
240 * To remove this restriction we'd have to disallow them
241 * from setting the same SSID on different IBSS interfaces
242 * belonging to the same hardware. Then, however, we're
243 * faced with having to adopt two different TSF timers...
245 if (iftype
== NL80211_IFTYPE_ADHOC
&&
246 nsdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
250 * The remaining checks are only performed for interfaces
251 * with the same MAC address.
253 if (!ether_addr_equal(sdata
->vif
.addr
,
258 * check whether it may have the same address
260 if (!identical_mac_addr_allowed(iftype
,
265 * can only add VLANs to enabled APs
267 if (iftype
== NL80211_IFTYPE_AP_VLAN
&&
268 nsdata
->vif
.type
== NL80211_IFTYPE_AP
)
269 sdata
->bss
= &nsdata
->u
.ap
;
276 static int ieee80211_check_queues(struct ieee80211_sub_if_data
*sdata
)
278 int n_queues
= sdata
->local
->hw
.queues
;
281 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
) {
282 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
283 if (WARN_ON_ONCE(sdata
->vif
.hw_queue
[i
] ==
284 IEEE80211_INVAL_HW_QUEUE
))
286 if (WARN_ON_ONCE(sdata
->vif
.hw_queue
[i
] >=
292 if ((sdata
->vif
.type
!= NL80211_IFTYPE_AP
) ||
293 !(sdata
->local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)) {
294 sdata
->vif
.cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
298 if (WARN_ON_ONCE(sdata
->vif
.cab_queue
== IEEE80211_INVAL_HW_QUEUE
))
301 if (WARN_ON_ONCE(sdata
->vif
.cab_queue
>= n_queues
))
307 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data
*sdata
,
310 struct ieee80211_local
*local
= sdata
->local
;
311 u32 flags
= sdata
->u
.mntr_flags
;
313 #define ADJUST(_f, _s) do { \
314 if (flags & MONITOR_FLAG_##_f) \
315 local->fif_##_s += offset; \
318 ADJUST(FCSFAIL
, fcsfail
);
319 ADJUST(PLCPFAIL
, plcpfail
);
320 ADJUST(CONTROL
, control
);
321 ADJUST(CONTROL
, pspoll
);
322 ADJUST(OTHER_BSS
, other_bss
);
327 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data
*sdata
)
329 struct ieee80211_local
*local
= sdata
->local
;
332 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
333 if (local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)
334 sdata
->vif
.hw_queue
[i
] = IEEE80211_INVAL_HW_QUEUE
;
335 else if (local
->hw
.queues
>= IEEE80211_NUM_ACS
)
336 sdata
->vif
.hw_queue
[i
] = i
;
338 sdata
->vif
.hw_queue
[i
] = 0;
340 sdata
->vif
.cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
343 static int ieee80211_add_virtual_monitor(struct ieee80211_local
*local
)
345 struct ieee80211_sub_if_data
*sdata
;
348 if (!(local
->hw
.flags
& IEEE80211_HW_WANT_MONITOR_VIF
))
351 mutex_lock(&local
->iflist_mtx
);
353 if (local
->monitor_sdata
)
356 sdata
= kzalloc(sizeof(*sdata
) + local
->hw
.vif_data_size
, GFP_KERNEL
);
363 sdata
->local
= local
;
364 sdata
->vif
.type
= NL80211_IFTYPE_MONITOR
;
365 snprintf(sdata
->name
, IFNAMSIZ
, "%s-monitor",
366 wiphy_name(local
->hw
.wiphy
));
368 ieee80211_set_default_queues(sdata
);
370 ret
= drv_add_interface(local
, sdata
);
372 /* ok .. stupid driver, it asked for this! */
377 ret
= ieee80211_check_queues(sdata
);
383 rcu_assign_pointer(local
->monitor_sdata
, sdata
);
385 mutex_unlock(&local
->iflist_mtx
);
389 static void ieee80211_del_virtual_monitor(struct ieee80211_local
*local
)
391 struct ieee80211_sub_if_data
*sdata
;
393 if (!(local
->hw
.flags
& IEEE80211_HW_WANT_MONITOR_VIF
))
396 mutex_lock(&local
->iflist_mtx
);
398 sdata
= rcu_dereference_protected(local
->monitor_sdata
,
399 lockdep_is_held(&local
->iflist_mtx
));
403 rcu_assign_pointer(local
->monitor_sdata
, NULL
);
406 drv_remove_interface(local
, sdata
);
410 mutex_unlock(&local
->iflist_mtx
);
414 * NOTE: Be very careful when changing this function, it must NOT return
415 * an error on interface type changes that have been pre-checked, so most
416 * checks should be in ieee80211_check_concurrent_iface.
418 int ieee80211_do_open(struct wireless_dev
*wdev
, bool coming_up
)
420 struct ieee80211_sub_if_data
*sdata
= IEEE80211_WDEV_TO_SUB_IF(wdev
);
421 struct net_device
*dev
= wdev
->netdev
;
422 struct ieee80211_local
*local
= sdata
->local
;
423 struct sta_info
*sta
;
426 u32 hw_reconf_flags
= 0;
428 switch (sdata
->vif
.type
) {
429 case NL80211_IFTYPE_WDS
:
430 if (!is_valid_ether_addr(sdata
->u
.wds
.remote_addr
))
433 case NL80211_IFTYPE_AP_VLAN
: {
434 struct ieee80211_sub_if_data
*master
;
439 list_add(&sdata
->u
.vlan
.list
, &sdata
->bss
->vlans
);
441 master
= container_of(sdata
->bss
,
442 struct ieee80211_sub_if_data
, u
.ap
);
443 sdata
->control_port_protocol
=
444 master
->control_port_protocol
;
445 sdata
->control_port_no_encrypt
=
446 master
->control_port_no_encrypt
;
449 case NL80211_IFTYPE_AP
:
450 sdata
->bss
= &sdata
->u
.ap
;
452 case NL80211_IFTYPE_MESH_POINT
:
453 case NL80211_IFTYPE_STATION
:
454 case NL80211_IFTYPE_MONITOR
:
455 case NL80211_IFTYPE_ADHOC
:
456 case NL80211_IFTYPE_P2P_DEVICE
:
457 /* no special treatment */
459 case NL80211_IFTYPE_UNSPECIFIED
:
460 case NUM_NL80211_IFTYPES
:
461 case NL80211_IFTYPE_P2P_CLIENT
:
462 case NL80211_IFTYPE_P2P_GO
:
468 if (local
->open_count
== 0) {
469 res
= drv_start(local
);
472 if (local
->ops
->napi_poll
)
473 napi_enable(&local
->napi
);
474 /* we're brought up, everything changes */
475 hw_reconf_flags
= ~0;
476 ieee80211_led_radio(local
, true);
477 ieee80211_mod_tpt_led_trig(local
,
478 IEEE80211_TPT_LEDTRIG_FL_RADIO
, 0);
482 * Copy the hopefully now-present MAC address to
483 * this interface, if it has the special null one.
485 if (dev
&& is_zero_ether_addr(dev
->dev_addr
)) {
486 memcpy(dev
->dev_addr
,
487 local
->hw
.wiphy
->perm_addr
,
489 memcpy(dev
->perm_addr
, dev
->dev_addr
, ETH_ALEN
);
491 if (!is_valid_ether_addr(dev
->dev_addr
)) {
492 res
= -EADDRNOTAVAIL
;
497 switch (sdata
->vif
.type
) {
498 case NL80211_IFTYPE_AP_VLAN
:
499 /* no need to tell driver, but set carrier */
500 if (rtnl_dereference(sdata
->bss
->beacon
))
501 netif_carrier_on(dev
);
503 netif_carrier_off(dev
);
505 case NL80211_IFTYPE_MONITOR
:
506 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
507 local
->cooked_mntrs
++;
511 if (local
->monitors
== 0 && local
->open_count
== 0) {
512 res
= ieee80211_add_virtual_monitor(local
);
517 /* must be before the call to ieee80211_configure_filter */
519 if (local
->monitors
== 1) {
520 local
->hw
.conf
.flags
|= IEEE80211_CONF_MONITOR
;
521 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
524 ieee80211_adjust_monitor_flags(sdata
, 1);
525 ieee80211_configure_filter(local
);
527 netif_carrier_on(dev
);
531 ieee80211_del_virtual_monitor(local
);
533 res
= drv_add_interface(local
, sdata
);
536 res
= ieee80211_check_queues(sdata
);
538 goto err_del_interface
;
541 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
543 local
->fif_probe_req
++;
545 ieee80211_configure_filter(local
);
546 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
547 local
->fif_probe_req
++;
550 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
)
551 changed
|= ieee80211_reset_erp_info(sdata
);
552 ieee80211_bss_info_change_notify(sdata
, changed
);
554 switch (sdata
->vif
.type
) {
555 case NL80211_IFTYPE_STATION
:
556 case NL80211_IFTYPE_ADHOC
:
557 case NL80211_IFTYPE_AP
:
558 case NL80211_IFTYPE_MESH_POINT
:
559 netif_carrier_off(dev
);
561 case NL80211_IFTYPE_WDS
:
562 case NL80211_IFTYPE_P2P_DEVICE
:
565 netif_carrier_on(dev
);
569 * set default queue parameters so drivers don't
570 * need to initialise the hardware if the hardware
571 * doesn't start up with sane defaults
573 ieee80211_set_wmm_default(sdata
, true);
576 set_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
578 if (sdata
->vif
.type
== NL80211_IFTYPE_WDS
) {
579 /* Create STA entry for the WDS peer */
580 sta
= sta_info_alloc(sdata
, sdata
->u
.wds
.remote_addr
,
584 goto err_del_interface
;
587 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTH
);
588 sta_info_pre_move_state(sta
, IEEE80211_STA_ASSOC
);
589 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
591 res
= sta_info_insert(sta
);
593 /* STA has been freed */
594 goto err_del_interface
;
597 rate_control_rate_init(sta
);
598 netif_carrier_on(dev
);
599 } else if (sdata
->vif
.type
== NL80211_IFTYPE_P2P_DEVICE
) {
600 rcu_assign_pointer(local
->p2p_sdata
, sdata
);
604 * set_multicast_list will be invoked by the networking core
605 * which will check whether any increments here were done in
606 * error and sync them down to the hardware as filter flags.
608 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
609 atomic_inc(&local
->iff_allmultis
);
611 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
612 atomic_inc(&local
->iff_promiscs
);
614 mutex_lock(&local
->mtx
);
615 hw_reconf_flags
|= __ieee80211_recalc_idle(local
);
616 mutex_unlock(&local
->mtx
);
622 ieee80211_hw_config(local
, hw_reconf_flags
);
624 ieee80211_recalc_ps(local
, -1);
627 netif_tx_start_all_queues(dev
);
631 drv_remove_interface(local
, sdata
);
633 if (!local
->open_count
)
637 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
638 list_del(&sdata
->u
.vlan
.list
);
639 /* might already be clear but that doesn't matter */
640 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
644 static int ieee80211_open(struct net_device
*dev
)
646 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
649 /* fail early if user set an invalid address */
650 if (!is_valid_ether_addr(dev
->dev_addr
))
651 return -EADDRNOTAVAIL
;
653 err
= ieee80211_check_concurrent_iface(sdata
, sdata
->vif
.type
);
657 return ieee80211_do_open(&sdata
->wdev
, true);
660 static void ieee80211_do_stop(struct ieee80211_sub_if_data
*sdata
,
663 struct ieee80211_local
*local
= sdata
->local
;
665 struct sk_buff
*skb
, *tmp
;
666 u32 hw_reconf_flags
= 0;
668 enum nl80211_channel_type orig_ct
;
670 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
672 if (rcu_access_pointer(local
->scan_sdata
) == sdata
)
673 ieee80211_scan_cancel(local
);
676 * Stop TX on this interface first.
679 netif_tx_stop_all_queues(sdata
->dev
);
681 ieee80211_roc_purge(sdata
);
684 * Remove all stations associated with this interface.
686 * This must be done before calling ops->remove_interface()
687 * because otherwise we can later invoke ops->sta_notify()
688 * whenever the STAs are removed, and that invalidates driver
689 * assumptions about always getting a vif pointer that is valid
690 * (because if we remove a STA after ops->remove_interface()
691 * the driver will have removed the vif info already!)
693 * This is relevant only in AP, WDS and mesh modes, since in
694 * all other modes we've already removed all stations when
697 sta_info_flush(local
, sdata
);
700 * Don't count this interface for promisc/allmulti while it
701 * is down. dev_mc_unsync() will invoke set_multicast_list
702 * on the master interface which will sync these down to the
703 * hardware as filter flags.
705 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
706 atomic_dec(&local
->iff_allmultis
);
708 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
709 atomic_dec(&local
->iff_promiscs
);
711 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
713 local
->fif_probe_req
--;
714 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
715 local
->fif_probe_req
--;
719 netif_addr_lock_bh(sdata
->dev
);
720 spin_lock_bh(&local
->filter_lock
);
721 __hw_addr_unsync(&local
->mc_list
, &sdata
->dev
->mc
,
722 sdata
->dev
->addr_len
);
723 spin_unlock_bh(&local
->filter_lock
);
724 netif_addr_unlock_bh(sdata
->dev
);
726 ieee80211_configure_filter(local
);
729 del_timer_sync(&local
->dynamic_ps_timer
);
730 cancel_work_sync(&local
->dynamic_ps_enable_work
);
732 /* APs need special treatment */
733 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
734 struct ieee80211_sub_if_data
*vlan
, *tmpsdata
;
735 struct beacon_data
*old_beacon
=
736 rtnl_dereference(sdata
->u
.ap
.beacon
);
737 struct probe_resp
*old_probe_resp
=
738 rtnl_dereference(sdata
->u
.ap
.probe_resp
);
740 /* sdata_running will return false, so this will disable */
741 ieee80211_bss_info_change_notify(sdata
,
742 BSS_CHANGED_BEACON_ENABLED
);
744 /* remove beacon and probe response */
745 RCU_INIT_POINTER(sdata
->u
.ap
.beacon
, NULL
);
746 RCU_INIT_POINTER(sdata
->u
.ap
.probe_resp
, NULL
);
749 kfree(old_probe_resp
);
751 /* down all dependent devices, that is VLANs */
752 list_for_each_entry_safe(vlan
, tmpsdata
, &sdata
->u
.ap
.vlans
,
754 dev_close(vlan
->dev
);
755 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
757 /* free all potentially still buffered bcast frames */
758 local
->total_ps_buffered
-= skb_queue_len(&sdata
->u
.ap
.ps_bc_buf
);
759 skb_queue_purge(&sdata
->u
.ap
.ps_bc_buf
);
760 } else if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
761 ieee80211_mgd_stop(sdata
);
767 switch (sdata
->vif
.type
) {
768 case NL80211_IFTYPE_AP_VLAN
:
769 list_del(&sdata
->u
.vlan
.list
);
770 /* no need to tell driver */
772 case NL80211_IFTYPE_MONITOR
:
773 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
774 local
->cooked_mntrs
--;
779 if (local
->monitors
== 0) {
780 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_MONITOR
;
781 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
782 ieee80211_del_virtual_monitor(local
);
785 ieee80211_adjust_monitor_flags(sdata
, -1);
786 ieee80211_configure_filter(local
);
788 case NL80211_IFTYPE_P2P_DEVICE
:
789 /* relies on synchronize_rcu() below */
790 rcu_assign_pointer(local
->p2p_sdata
, NULL
);
793 flush_work(&sdata
->work
);
795 * When we get here, the interface is marked down.
796 * Call rcu_barrier() to wait both for the RX path
797 * should it be using the interface and enqueuing
798 * frames at this very time on another CPU, and
799 * for the sta free call_rcu callbacks.
804 * free_sta_rcu() enqueues a work for the actual
805 * sta cleanup, so we need to flush it while
806 * sdata is still valid.
808 flush_workqueue(local
->workqueue
);
810 skb_queue_purge(&sdata
->skb_queue
);
813 * Free all remaining keys, there shouldn't be any,
814 * except maybe group keys in AP more or WDS?
816 ieee80211_free_keys(sdata
);
819 drv_remove_interface(local
, sdata
);
824 mutex_lock(&local
->mtx
);
825 hw_reconf_flags
|= __ieee80211_recalc_idle(local
);
826 mutex_unlock(&local
->mtx
);
828 ieee80211_recalc_ps(local
, -1);
830 if (local
->open_count
== 0) {
831 if (local
->ops
->napi_poll
)
832 napi_disable(&local
->napi
);
833 ieee80211_clear_tx_pending(local
);
834 ieee80211_stop_device(local
);
836 /* no reconfiguring after stop! */
840 /* Re-calculate channel-type, in case there are multiple vifs
841 * on different channel types.
843 orig_ct
= local
->_oper_channel_type
;
844 ieee80211_set_channel_type(local
, NULL
, NL80211_CHAN_NO_HT
);
846 /* do after stop to avoid reconfiguring when we stop anyway */
847 if (hw_reconf_flags
|| (orig_ct
!= local
->_oper_channel_type
))
848 ieee80211_hw_config(local
, hw_reconf_flags
);
850 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
851 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
852 skb_queue_walk_safe(&local
->pending
[i
], skb
, tmp
) {
853 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
854 if (info
->control
.vif
== &sdata
->vif
) {
855 __skb_unlink(skb
, &local
->pending
[i
]);
856 ieee80211_free_txskb(&local
->hw
, skb
);
860 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
862 if (local
->monitors
== local
->open_count
&& local
->monitors
> 0)
863 ieee80211_add_virtual_monitor(local
);
866 static int ieee80211_stop(struct net_device
*dev
)
868 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
870 ieee80211_do_stop(sdata
, true);
875 static void ieee80211_set_multicast_list(struct net_device
*dev
)
877 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
878 struct ieee80211_local
*local
= sdata
->local
;
879 int allmulti
, promisc
, sdata_allmulti
, sdata_promisc
;
881 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
882 promisc
= !!(dev
->flags
& IFF_PROMISC
);
883 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
884 sdata_promisc
= !!(sdata
->flags
& IEEE80211_SDATA_PROMISC
);
886 if (allmulti
!= sdata_allmulti
) {
887 if (dev
->flags
& IFF_ALLMULTI
)
888 atomic_inc(&local
->iff_allmultis
);
890 atomic_dec(&local
->iff_allmultis
);
891 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
894 if (promisc
!= sdata_promisc
) {
895 if (dev
->flags
& IFF_PROMISC
)
896 atomic_inc(&local
->iff_promiscs
);
898 atomic_dec(&local
->iff_promiscs
);
899 sdata
->flags
^= IEEE80211_SDATA_PROMISC
;
901 spin_lock_bh(&local
->filter_lock
);
902 __hw_addr_sync(&local
->mc_list
, &dev
->mc
, dev
->addr_len
);
903 spin_unlock_bh(&local
->filter_lock
);
904 ieee80211_queue_work(&local
->hw
, &local
->reconfig_filter
);
908 * Called when the netdev is removed or, by the code below, before
909 * the interface type changes.
911 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data
*sdata
)
913 struct ieee80211_local
*local
= sdata
->local
;
917 /* free extra data */
918 ieee80211_free_keys(sdata
);
920 ieee80211_debugfs_remove_netdev(sdata
);
922 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
923 __skb_queue_purge(&sdata
->fragments
[i
].skb_list
);
924 sdata
->fragment_next
= 0;
926 if (ieee80211_vif_is_mesh(&sdata
->vif
))
927 mesh_rmc_free(sdata
);
929 flushed
= sta_info_flush(local
, sdata
);
933 static void ieee80211_uninit(struct net_device
*dev
)
935 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev
));
938 static u16
ieee80211_netdev_select_queue(struct net_device
*dev
,
941 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev
), skb
);
944 static const struct net_device_ops ieee80211_dataif_ops
= {
945 .ndo_open
= ieee80211_open
,
946 .ndo_stop
= ieee80211_stop
,
947 .ndo_uninit
= ieee80211_uninit
,
948 .ndo_start_xmit
= ieee80211_subif_start_xmit
,
949 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
950 .ndo_change_mtu
= ieee80211_change_mtu
,
951 .ndo_set_mac_address
= ieee80211_change_mac
,
952 .ndo_select_queue
= ieee80211_netdev_select_queue
,
955 static u16
ieee80211_monitor_select_queue(struct net_device
*dev
,
958 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
959 struct ieee80211_local
*local
= sdata
->local
;
960 struct ieee80211_hdr
*hdr
;
961 struct ieee80211_radiotap_header
*rtap
= (void *)skb
->data
;
963 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
967 skb
->len
< le16_to_cpu(rtap
->it_len
) + 2 /* frame control */)
968 return 0; /* doesn't matter, frame will be dropped */
970 hdr
= (void *)((u8
*)skb
->data
+ le16_to_cpu(rtap
->it_len
));
972 return ieee80211_select_queue_80211(sdata
, skb
, hdr
);
975 static const struct net_device_ops ieee80211_monitorif_ops
= {
976 .ndo_open
= ieee80211_open
,
977 .ndo_stop
= ieee80211_stop
,
978 .ndo_uninit
= ieee80211_uninit
,
979 .ndo_start_xmit
= ieee80211_monitor_start_xmit
,
980 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
981 .ndo_change_mtu
= ieee80211_change_mtu
,
982 .ndo_set_mac_address
= eth_mac_addr
,
983 .ndo_select_queue
= ieee80211_monitor_select_queue
,
986 static void ieee80211_if_setup(struct net_device
*dev
)
989 dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
990 dev
->netdev_ops
= &ieee80211_dataif_ops
;
991 dev
->destructor
= free_netdev
;
994 static void ieee80211_iface_work(struct work_struct
*work
)
996 struct ieee80211_sub_if_data
*sdata
=
997 container_of(work
, struct ieee80211_sub_if_data
, work
);
998 struct ieee80211_local
*local
= sdata
->local
;
1000 struct sta_info
*sta
;
1001 struct ieee80211_ra_tid
*ra_tid
;
1003 if (!ieee80211_sdata_running(sdata
))
1006 if (local
->scanning
)
1010 * ieee80211_queue_work() should have picked up most cases,
1011 * here we'll pick the rest.
1013 if (WARN(local
->suspended
,
1014 "interface work scheduled while going to suspend\n"))
1017 /* first process frames */
1018 while ((skb
= skb_dequeue(&sdata
->skb_queue
))) {
1019 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
1021 if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_START
) {
1022 ra_tid
= (void *)&skb
->cb
;
1023 ieee80211_start_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
1025 } else if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_STOP
) {
1026 ra_tid
= (void *)&skb
->cb
;
1027 ieee80211_stop_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
1029 } else if (ieee80211_is_action(mgmt
->frame_control
) &&
1030 mgmt
->u
.action
.category
== WLAN_CATEGORY_BACK
) {
1033 mutex_lock(&local
->sta_mtx
);
1034 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
1036 switch (mgmt
->u
.action
.u
.addba_req
.action_code
) {
1037 case WLAN_ACTION_ADDBA_REQ
:
1038 ieee80211_process_addba_request(
1039 local
, sta
, mgmt
, len
);
1041 case WLAN_ACTION_ADDBA_RESP
:
1042 ieee80211_process_addba_resp(local
, sta
,
1045 case WLAN_ACTION_DELBA
:
1046 ieee80211_process_delba(sdata
, sta
,
1054 mutex_unlock(&local
->sta_mtx
);
1055 } else if (ieee80211_is_data_qos(mgmt
->frame_control
)) {
1056 struct ieee80211_hdr
*hdr
= (void *)mgmt
;
1058 * So the frame isn't mgmt, but frame_control
1059 * is at the right place anyway, of course, so
1060 * the if statement is correct.
1062 * Warn if we have other data frame types here,
1063 * they must not get here.
1065 WARN_ON(hdr
->frame_control
&
1066 cpu_to_le16(IEEE80211_STYPE_NULLFUNC
));
1067 WARN_ON(!(hdr
->seq_ctrl
&
1068 cpu_to_le16(IEEE80211_SCTL_FRAG
)));
1070 * This was a fragment of a frame, received while
1071 * a block-ack session was active. That cannot be
1072 * right, so terminate the session.
1074 mutex_lock(&local
->sta_mtx
);
1075 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
1077 u16 tid
= *ieee80211_get_qos_ctl(hdr
) &
1078 IEEE80211_QOS_CTL_TID_MASK
;
1080 __ieee80211_stop_rx_ba_session(
1081 sta
, tid
, WLAN_BACK_RECIPIENT
,
1082 WLAN_REASON_QSTA_REQUIRE_SETUP
,
1085 mutex_unlock(&local
->sta_mtx
);
1086 } else switch (sdata
->vif
.type
) {
1087 case NL80211_IFTYPE_STATION
:
1088 ieee80211_sta_rx_queued_mgmt(sdata
, skb
);
1090 case NL80211_IFTYPE_ADHOC
:
1091 ieee80211_ibss_rx_queued_mgmt(sdata
, skb
);
1093 case NL80211_IFTYPE_MESH_POINT
:
1094 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
1096 ieee80211_mesh_rx_queued_mgmt(sdata
, skb
);
1099 WARN(1, "frame for unexpected interface type");
1106 /* then other type-dependent work */
1107 switch (sdata
->vif
.type
) {
1108 case NL80211_IFTYPE_STATION
:
1109 ieee80211_sta_work(sdata
);
1111 case NL80211_IFTYPE_ADHOC
:
1112 ieee80211_ibss_work(sdata
);
1114 case NL80211_IFTYPE_MESH_POINT
:
1115 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
1117 ieee80211_mesh_work(sdata
);
1126 * Helper function to initialise an interface to a specific type.
1128 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data
*sdata
,
1129 enum nl80211_iftype type
)
1131 /* clear type-dependent union */
1132 memset(&sdata
->u
, 0, sizeof(sdata
->u
));
1134 /* and set some type-dependent values */
1135 sdata
->vif
.type
= type
;
1136 sdata
->vif
.p2p
= false;
1137 sdata
->wdev
.iftype
= type
;
1139 sdata
->control_port_protocol
= cpu_to_be16(ETH_P_PAE
);
1140 sdata
->control_port_no_encrypt
= false;
1142 sdata
->noack_map
= 0;
1144 /* only monitor/p2p-device differ */
1146 sdata
->dev
->netdev_ops
= &ieee80211_dataif_ops
;
1147 sdata
->dev
->type
= ARPHRD_ETHER
;
1150 skb_queue_head_init(&sdata
->skb_queue
);
1151 INIT_WORK(&sdata
->work
, ieee80211_iface_work
);
1154 case NL80211_IFTYPE_P2P_GO
:
1155 type
= NL80211_IFTYPE_AP
;
1156 sdata
->vif
.type
= type
;
1157 sdata
->vif
.p2p
= true;
1159 case NL80211_IFTYPE_AP
:
1160 skb_queue_head_init(&sdata
->u
.ap
.ps_bc_buf
);
1161 INIT_LIST_HEAD(&sdata
->u
.ap
.vlans
);
1163 case NL80211_IFTYPE_P2P_CLIENT
:
1164 type
= NL80211_IFTYPE_STATION
;
1165 sdata
->vif
.type
= type
;
1166 sdata
->vif
.p2p
= true;
1168 case NL80211_IFTYPE_STATION
:
1169 ieee80211_sta_setup_sdata(sdata
);
1171 case NL80211_IFTYPE_ADHOC
:
1172 ieee80211_ibss_setup_sdata(sdata
);
1174 case NL80211_IFTYPE_MESH_POINT
:
1175 if (ieee80211_vif_is_mesh(&sdata
->vif
))
1176 ieee80211_mesh_init_sdata(sdata
);
1178 case NL80211_IFTYPE_MONITOR
:
1179 sdata
->dev
->type
= ARPHRD_IEEE80211_RADIOTAP
;
1180 sdata
->dev
->netdev_ops
= &ieee80211_monitorif_ops
;
1181 sdata
->u
.mntr_flags
= MONITOR_FLAG_CONTROL
|
1182 MONITOR_FLAG_OTHER_BSS
;
1184 case NL80211_IFTYPE_WDS
:
1185 case NL80211_IFTYPE_AP_VLAN
:
1186 case NL80211_IFTYPE_P2P_DEVICE
:
1188 case NL80211_IFTYPE_UNSPECIFIED
:
1189 case NUM_NL80211_IFTYPES
:
1194 ieee80211_debugfs_add_netdev(sdata
);
1197 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data
*sdata
,
1198 enum nl80211_iftype type
)
1200 struct ieee80211_local
*local
= sdata
->local
;
1202 enum nl80211_iftype internal_type
= type
;
1207 if (!local
->ops
->change_interface
)
1210 switch (sdata
->vif
.type
) {
1211 case NL80211_IFTYPE_AP
:
1212 case NL80211_IFTYPE_STATION
:
1213 case NL80211_IFTYPE_ADHOC
:
1215 * Could maybe also all others here?
1216 * Just not sure how that interacts
1217 * with the RX/config path e.g. for
1226 case NL80211_IFTYPE_AP
:
1227 case NL80211_IFTYPE_STATION
:
1228 case NL80211_IFTYPE_ADHOC
:
1230 * Could probably support everything
1231 * but WDS here (WDS do_open can fail
1232 * under memory pressure, which this
1233 * code isn't prepared to handle).
1236 case NL80211_IFTYPE_P2P_CLIENT
:
1238 internal_type
= NL80211_IFTYPE_STATION
;
1240 case NL80211_IFTYPE_P2P_GO
:
1242 internal_type
= NL80211_IFTYPE_AP
;
1248 ret
= ieee80211_check_concurrent_iface(sdata
, internal_type
);
1252 ieee80211_do_stop(sdata
, false);
1254 ieee80211_teardown_sdata(sdata
);
1256 ret
= drv_change_interface(local
, sdata
, internal_type
, p2p
);
1258 type
= sdata
->vif
.type
;
1261 * Ignore return value here, there's not much we can do since
1262 * the driver changed the interface type internally already.
1263 * The warnings will hopefully make driver authors fix it :-)
1265 ieee80211_check_queues(sdata
);
1267 ieee80211_setup_sdata(sdata
, type
);
1269 err
= ieee80211_do_open(&sdata
->wdev
, false);
1270 WARN(err
, "type change: do_open returned %d", err
);
1275 int ieee80211_if_change_type(struct ieee80211_sub_if_data
*sdata
,
1276 enum nl80211_iftype type
)
1282 if (type
== ieee80211_vif_type_p2p(&sdata
->vif
))
1285 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
1286 if (sdata
->local
->oper_channel
->flags
& IEEE80211_CHAN_NO_IBSS
&&
1287 type
== NL80211_IFTYPE_ADHOC
)
1290 if (ieee80211_sdata_running(sdata
)) {
1291 ret
= ieee80211_runtime_change_iftype(sdata
, type
);
1295 /* Purge and reset type-dependent state. */
1296 ieee80211_teardown_sdata(sdata
);
1297 ieee80211_setup_sdata(sdata
, type
);
1300 /* reset some values that shouldn't be kept across type changes */
1301 sdata
->vif
.bss_conf
.basic_rates
=
1302 ieee80211_mandatory_rates(sdata
->local
,
1303 sdata
->local
->oper_channel
->band
);
1304 sdata
->drop_unencrypted
= 0;
1305 if (type
== NL80211_IFTYPE_STATION
)
1306 sdata
->u
.mgd
.use_4addr
= false;
1311 static void ieee80211_assign_perm_addr(struct ieee80211_local
*local
,
1312 u8
*perm_addr
, enum nl80211_iftype type
)
1314 struct ieee80211_sub_if_data
*sdata
;
1315 u64 mask
, start
, addr
, val
, inc
;
1317 u8 tmp_addr
[ETH_ALEN
];
1320 /* default ... something at least */
1321 memcpy(perm_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
1323 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
) &&
1324 local
->hw
.wiphy
->n_addresses
<= 1)
1327 mutex_lock(&local
->iflist_mtx
);
1330 case NL80211_IFTYPE_MONITOR
:
1331 /* doesn't matter */
1333 case NL80211_IFTYPE_WDS
:
1334 case NL80211_IFTYPE_AP_VLAN
:
1335 /* match up with an AP interface */
1336 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1337 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
1339 memcpy(perm_addr
, sdata
->vif
.addr
, ETH_ALEN
);
1342 /* keep default if no AP interface present */
1344 case NL80211_IFTYPE_P2P_CLIENT
:
1345 case NL80211_IFTYPE_P2P_GO
:
1346 if (local
->hw
.flags
& IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF
) {
1347 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1348 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
)
1350 if (!ieee80211_sdata_running(sdata
))
1352 memcpy(perm_addr
, sdata
->vif
.addr
, ETH_ALEN
);
1356 /* otherwise fall through */
1358 /* assign a new address if possible -- try n_addresses first */
1359 for (i
= 0; i
< local
->hw
.wiphy
->n_addresses
; i
++) {
1362 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1363 if (memcmp(local
->hw
.wiphy
->addresses
[i
].addr
,
1364 sdata
->vif
.addr
, ETH_ALEN
) == 0) {
1372 local
->hw
.wiphy
->addresses
[i
].addr
,
1378 /* try mask if available */
1379 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
))
1382 m
= local
->hw
.wiphy
->addr_mask
;
1383 mask
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1384 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1385 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1387 if (__ffs64(mask
) + hweight64(mask
) != fls64(mask
)) {
1388 /* not a contiguous mask ... not handled now! */
1389 pr_info("not contiguous\n");
1393 m
= local
->hw
.wiphy
->perm_addr
;
1394 start
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1395 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1396 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1398 inc
= 1ULL<<__ffs64(mask
);
1399 val
= (start
& mask
);
1400 addr
= (start
& ~mask
) | (val
& mask
);
1404 tmp_addr
[5] = addr
>> 0*8;
1405 tmp_addr
[4] = addr
>> 1*8;
1406 tmp_addr
[3] = addr
>> 2*8;
1407 tmp_addr
[2] = addr
>> 3*8;
1408 tmp_addr
[1] = addr
>> 4*8;
1409 tmp_addr
[0] = addr
>> 5*8;
1413 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1414 if (memcmp(tmp_addr
, sdata
->vif
.addr
,
1422 memcpy(perm_addr
, tmp_addr
, ETH_ALEN
);
1425 addr
= (start
& ~mask
) | (val
& mask
);
1426 } while (addr
!= start
);
1432 mutex_unlock(&local
->iflist_mtx
);
1435 int ieee80211_if_add(struct ieee80211_local
*local
, const char *name
,
1436 struct wireless_dev
**new_wdev
, enum nl80211_iftype type
,
1437 struct vif_params
*params
)
1439 struct net_device
*ndev
= NULL
;
1440 struct ieee80211_sub_if_data
*sdata
= NULL
;
1446 if (type
== NL80211_IFTYPE_P2P_DEVICE
) {
1447 struct wireless_dev
*wdev
;
1449 sdata
= kzalloc(sizeof(*sdata
) + local
->hw
.vif_data_size
,
1453 wdev
= &sdata
->wdev
;
1456 strlcpy(sdata
->name
, name
, IFNAMSIZ
);
1457 ieee80211_assign_perm_addr(local
, wdev
->address
, type
);
1458 memcpy(sdata
->vif
.addr
, wdev
->address
, ETH_ALEN
);
1460 if (local
->hw
.queues
>= IEEE80211_NUM_ACS
)
1461 txqs
= IEEE80211_NUM_ACS
;
1463 ndev
= alloc_netdev_mqs(sizeof(*sdata
) +
1464 local
->hw
.vif_data_size
,
1465 name
, ieee80211_if_setup
, txqs
, 1);
1468 dev_net_set(ndev
, wiphy_net(local
->hw
.wiphy
));
1470 ndev
->needed_headroom
= local
->tx_headroom
+
1471 4*6 /* four MAC addresses */
1472 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1474 + 8 /* rfc1042/bridge tunnel */
1475 - ETH_HLEN
/* ethernet hard_header_len */
1476 + IEEE80211_ENCRYPT_HEADROOM
;
1477 ndev
->needed_tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
1479 ret
= dev_alloc_name(ndev
, ndev
->name
);
1485 ieee80211_assign_perm_addr(local
, ndev
->perm_addr
, type
);
1486 memcpy(ndev
->dev_addr
, ndev
->perm_addr
, ETH_ALEN
);
1487 SET_NETDEV_DEV(ndev
, wiphy_dev(local
->hw
.wiphy
));
1489 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1490 sdata
= netdev_priv(ndev
);
1491 ndev
->ieee80211_ptr
= &sdata
->wdev
;
1492 memcpy(sdata
->vif
.addr
, ndev
->dev_addr
, ETH_ALEN
);
1493 memcpy(sdata
->name
, ndev
->name
, IFNAMSIZ
);
1498 /* initialise type-independent data */
1499 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
1500 sdata
->local
= local
;
1502 sdata
->arp_filter_state
= true;
1505 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
1506 skb_queue_head_init(&sdata
->fragments
[i
].skb_list
);
1508 INIT_LIST_HEAD(&sdata
->key_list
);
1510 for (i
= 0; i
< IEEE80211_NUM_BANDS
; i
++) {
1511 struct ieee80211_supported_band
*sband
;
1512 sband
= local
->hw
.wiphy
->bands
[i
];
1513 sdata
->rc_rateidx_mask
[i
] =
1514 sband
? (1 << sband
->n_bitrates
) - 1 : 0;
1516 memcpy(sdata
->rc_rateidx_mcs_mask
[i
],
1517 sband
->ht_cap
.mcs
.rx_mask
,
1518 sizeof(sdata
->rc_rateidx_mcs_mask
[i
]));
1520 memset(sdata
->rc_rateidx_mcs_mask
[i
], 0,
1521 sizeof(sdata
->rc_rateidx_mcs_mask
[i
]));
1524 ieee80211_set_default_queues(sdata
);
1526 /* setup type-dependent data */
1527 ieee80211_setup_sdata(sdata
, type
);
1531 ndev
->ieee80211_ptr
->use_4addr
= params
->use_4addr
;
1532 if (type
== NL80211_IFTYPE_STATION
)
1533 sdata
->u
.mgd
.use_4addr
= params
->use_4addr
;
1536 ndev
->features
|= local
->hw
.netdev_features
;
1538 ret
= register_netdevice(ndev
);
1545 mutex_lock(&local
->iflist_mtx
);
1546 list_add_tail_rcu(&sdata
->list
, &local
->interfaces
);
1547 mutex_unlock(&local
->iflist_mtx
);
1550 *new_wdev
= &sdata
->wdev
;
1555 void ieee80211_if_remove(struct ieee80211_sub_if_data
*sdata
)
1559 mutex_lock(&sdata
->local
->iflist_mtx
);
1560 list_del_rcu(&sdata
->list
);
1561 mutex_unlock(&sdata
->local
->iflist_mtx
);
1566 unregister_netdevice(sdata
->dev
);
1568 cfg80211_unregister_wdev(&sdata
->wdev
);
1573 void ieee80211_sdata_stop(struct ieee80211_sub_if_data
*sdata
)
1575 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING
, &sdata
->state
)))
1577 ieee80211_do_stop(sdata
, true);
1578 ieee80211_teardown_sdata(sdata
);
1582 * Remove all interfaces, may only be called at hardware unregistration
1583 * time because it doesn't do RCU-safe list removals.
1585 void ieee80211_remove_interfaces(struct ieee80211_local
*local
)
1587 struct ieee80211_sub_if_data
*sdata
, *tmp
;
1588 LIST_HEAD(unreg_list
);
1589 LIST_HEAD(wdev_list
);
1593 mutex_lock(&local
->iflist_mtx
);
1594 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
1595 list_del(&sdata
->list
);
1598 unregister_netdevice_queue(sdata
->dev
, &unreg_list
);
1600 list_add(&sdata
->list
, &wdev_list
);
1602 mutex_unlock(&local
->iflist_mtx
);
1603 unregister_netdevice_many(&unreg_list
);
1604 list_del(&unreg_list
);
1606 list_for_each_entry_safe(sdata
, tmp
, &wdev_list
, list
) {
1607 list_del(&sdata
->list
);
1608 cfg80211_unregister_wdev(&sdata
->wdev
);
1613 static int netdev_notify(struct notifier_block
*nb
,
1614 unsigned long state
,
1617 struct net_device
*dev
= ndev
;
1618 struct ieee80211_sub_if_data
*sdata
;
1620 if (state
!= NETDEV_CHANGENAME
)
1623 if (!dev
->ieee80211_ptr
|| !dev
->ieee80211_ptr
->wiphy
)
1626 if (dev
->ieee80211_ptr
->wiphy
->privid
!= mac80211_wiphy_privid
)
1629 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1631 memcpy(sdata
->name
, dev
->name
, IFNAMSIZ
);
1633 ieee80211_debugfs_rename_netdev(sdata
);
1637 static struct notifier_block mac80211_netdev_notifier
= {
1638 .notifier_call
= netdev_notify
,
1641 int ieee80211_iface_init(void)
1643 return register_netdevice_notifier(&mac80211_netdev_notifier
);
1646 void ieee80211_iface_exit(void)
1648 unregister_netdevice_notifier(&mac80211_netdev_notifier
);