4 * Copyright 2002-2005, Instant802 Networks, Inc.
5 * Copyright 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
14 #include <linux/slab.h>
15 #include <linux/kernel.h>
16 #include <linux/if_arp.h>
17 #include <linux/netdevice.h>
18 #include <linux/rtnetlink.h>
19 #include <net/mac80211.h>
20 #include <net/ieee80211_radiotap.h>
21 #include "ieee80211_i.h"
23 #include "debugfs_netdev.h"
26 #include "driver-ops.h"
31 * DOC: Interface list locking
33 * The interface list in each struct ieee80211_local is protected
36 * (1) modifications may only be done under the RTNL
37 * (2) modifications and readers are protected against each other by
39 * (3) modifications are done in an RCU manner so atomic readers
40 * can traverse the list in RCU-safe blocks.
42 * As a consequence, reads (traversals) of the list can be protected
43 * by either the RTNL, the iflist_mtx or RCU.
46 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data
*sdata
)
48 struct ieee80211_chanctx_conf
*chanctx_conf
;
52 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
58 power
= ieee80211_chandef_max_power(&chanctx_conf
->def
);
61 if (sdata
->user_power_level
!= IEEE80211_UNSET_POWER_LEVEL
)
62 power
= min(power
, sdata
->user_power_level
);
64 if (sdata
->ap_power_level
!= IEEE80211_UNSET_POWER_LEVEL
)
65 power
= min(power
, sdata
->ap_power_level
);
67 if (power
!= sdata
->vif
.bss_conf
.txpower
) {
68 sdata
->vif
.bss_conf
.txpower
= power
;
69 ieee80211_hw_config(sdata
->local
, 0);
76 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data
*sdata
)
78 if (__ieee80211_recalc_txpower(sdata
))
79 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_TXPOWER
);
82 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 ieee80211_flush_queues(local
, NULL
);
98 local
->hw
.conf
.flags
|= IEEE80211_CONF_IDLE
;
99 return IEEE80211_CONF_CHANGE_IDLE
;
102 static u32
__ieee80211_recalc_idle(struct ieee80211_local
*local
,
105 bool working
, scanning
, active
;
106 unsigned int led_trig_start
= 0, led_trig_stop
= 0;
108 lockdep_assert_held(&local
->mtx
);
110 active
= force_active
||
111 !list_empty(&local
->chanctx_list
) ||
114 working
= !local
->ops
->remain_on_channel
&&
115 !list_empty(&local
->roc_list
);
117 scanning
= test_bit(SCAN_SW_SCANNING
, &local
->scanning
) ||
118 test_bit(SCAN_ONCHANNEL_SCANNING
, &local
->scanning
);
120 if (working
|| scanning
)
121 led_trig_start
|= IEEE80211_TPT_LEDTRIG_FL_WORK
;
123 led_trig_stop
|= IEEE80211_TPT_LEDTRIG_FL_WORK
;
126 led_trig_start
|= IEEE80211_TPT_LEDTRIG_FL_CONNECTED
;
128 led_trig_stop
|= IEEE80211_TPT_LEDTRIG_FL_CONNECTED
;
130 ieee80211_mod_tpt_led_trig(local
, led_trig_start
, led_trig_stop
);
132 if (working
|| scanning
|| active
)
133 return __ieee80211_idle_off(local
);
134 return __ieee80211_idle_on(local
);
137 u32
ieee80211_idle_off(struct ieee80211_local
*local
)
139 return __ieee80211_recalc_idle(local
, true);
142 void ieee80211_recalc_idle(struct ieee80211_local
*local
)
144 u32 change
= __ieee80211_recalc_idle(local
, false);
146 ieee80211_hw_config(local
, change
);
149 static int ieee80211_change_mtu(struct net_device
*dev
, int new_mtu
)
151 if (new_mtu
< 256 || new_mtu
> IEEE80211_MAX_DATA_LEN
)
158 static int ieee80211_verify_mac(struct ieee80211_sub_if_data
*sdata
, u8
*addr
,
161 struct ieee80211_local
*local
= sdata
->local
;
162 struct ieee80211_sub_if_data
*iter
;
167 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
))
171 new = ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
172 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
173 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
175 m
= local
->hw
.wiphy
->addr_mask
;
176 mask
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
177 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
178 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
183 mutex_lock(&local
->iflist_mtx
);
184 list_for_each_entry(iter
, &local
->interfaces
, list
) {
188 if (iter
->vif
.type
== NL80211_IFTYPE_MONITOR
&&
189 !(iter
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
))
193 tmp
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
194 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
195 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
197 if ((new & ~mask
) != (tmp
& ~mask
)) {
202 mutex_unlock(&local
->iflist_mtx
);
207 static int ieee80211_change_mac(struct net_device
*dev
, void *addr
)
209 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
210 struct sockaddr
*sa
= addr
;
211 bool check_dup
= true;
214 if (ieee80211_sdata_running(sdata
))
217 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
&&
218 !(sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
))
221 ret
= ieee80211_verify_mac(sdata
, sa
->sa_data
, check_dup
);
225 ret
= eth_mac_addr(dev
, sa
);
228 memcpy(sdata
->vif
.addr
, sa
->sa_data
, ETH_ALEN
);
233 static inline int identical_mac_addr_allowed(int type1
, int type2
)
235 return type1
== NL80211_IFTYPE_MONITOR
||
236 type2
== NL80211_IFTYPE_MONITOR
||
237 type1
== NL80211_IFTYPE_P2P_DEVICE
||
238 type2
== NL80211_IFTYPE_P2P_DEVICE
||
239 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_WDS
) ||
240 (type1
== NL80211_IFTYPE_WDS
&&
241 (type2
== NL80211_IFTYPE_WDS
||
242 type2
== NL80211_IFTYPE_AP
)) ||
243 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_AP_VLAN
) ||
244 (type1
== NL80211_IFTYPE_AP_VLAN
&&
245 (type2
== NL80211_IFTYPE_AP
||
246 type2
== NL80211_IFTYPE_AP_VLAN
));
249 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data
*sdata
,
250 enum nl80211_iftype iftype
)
252 struct ieee80211_local
*local
= sdata
->local
;
253 struct ieee80211_sub_if_data
*nsdata
;
258 /* we hold the RTNL here so can safely walk the list */
259 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
260 if (nsdata
!= sdata
&& ieee80211_sdata_running(nsdata
)) {
262 * Only OCB and monitor mode may coexist
264 if ((sdata
->vif
.type
== NL80211_IFTYPE_OCB
&&
265 nsdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
) ||
266 (sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
267 nsdata
->vif
.type
== NL80211_IFTYPE_OCB
))
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
)
284 * will not add another interface while any channel
287 if (nsdata
->vif
.csa_active
)
291 * The remaining checks are only performed for interfaces
292 * with the same MAC address.
294 if (!ether_addr_equal(sdata
->vif
.addr
,
299 * check whether it may have the same address
301 if (!identical_mac_addr_allowed(iftype
,
306 * can only add VLANs to enabled APs
308 if (iftype
== NL80211_IFTYPE_AP_VLAN
&&
309 nsdata
->vif
.type
== NL80211_IFTYPE_AP
)
310 sdata
->bss
= &nsdata
->u
.ap
;
314 mutex_lock(&local
->chanctx_mtx
);
315 ret
= ieee80211_check_combinations(sdata
, NULL
, 0, 0);
316 mutex_unlock(&local
->chanctx_mtx
);
320 static int ieee80211_check_queues(struct ieee80211_sub_if_data
*sdata
,
321 enum nl80211_iftype iftype
)
323 int n_queues
= sdata
->local
->hw
.queues
;
326 if (iftype
!= NL80211_IFTYPE_P2P_DEVICE
) {
327 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
328 if (WARN_ON_ONCE(sdata
->vif
.hw_queue
[i
] ==
329 IEEE80211_INVAL_HW_QUEUE
))
331 if (WARN_ON_ONCE(sdata
->vif
.hw_queue
[i
] >=
337 if ((iftype
!= NL80211_IFTYPE_AP
&&
338 iftype
!= NL80211_IFTYPE_P2P_GO
&&
339 iftype
!= NL80211_IFTYPE_MESH_POINT
) ||
340 !(sdata
->local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)) {
341 sdata
->vif
.cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
345 if (WARN_ON_ONCE(sdata
->vif
.cab_queue
== IEEE80211_INVAL_HW_QUEUE
))
348 if (WARN_ON_ONCE(sdata
->vif
.cab_queue
>= n_queues
))
354 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data
*sdata
,
357 struct ieee80211_local
*local
= sdata
->local
;
358 u32 flags
= sdata
->u
.mntr_flags
;
360 #define ADJUST(_f, _s) do { \
361 if (flags & MONITOR_FLAG_##_f) \
362 local->fif_##_s += offset; \
365 ADJUST(FCSFAIL
, fcsfail
);
366 ADJUST(PLCPFAIL
, plcpfail
);
367 ADJUST(CONTROL
, control
);
368 ADJUST(CONTROL
, pspoll
);
369 ADJUST(OTHER_BSS
, other_bss
);
374 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data
*sdata
)
376 struct ieee80211_local
*local
= sdata
->local
;
379 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
380 if (local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)
381 sdata
->vif
.hw_queue
[i
] = IEEE80211_INVAL_HW_QUEUE
;
382 else if (local
->hw
.queues
>= IEEE80211_NUM_ACS
)
383 sdata
->vif
.hw_queue
[i
] = i
;
385 sdata
->vif
.hw_queue
[i
] = 0;
387 sdata
->vif
.cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
390 int ieee80211_add_virtual_monitor(struct ieee80211_local
*local
)
392 struct ieee80211_sub_if_data
*sdata
;
395 if (!(local
->hw
.flags
& IEEE80211_HW_WANT_MONITOR_VIF
))
400 if (local
->monitor_sdata
)
403 sdata
= kzalloc(sizeof(*sdata
) + local
->hw
.vif_data_size
, GFP_KERNEL
);
408 sdata
->local
= local
;
409 sdata
->vif
.type
= NL80211_IFTYPE_MONITOR
;
410 snprintf(sdata
->name
, IFNAMSIZ
, "%s-monitor",
411 wiphy_name(local
->hw
.wiphy
));
412 sdata
->wdev
.iftype
= NL80211_IFTYPE_MONITOR
;
414 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
416 ieee80211_set_default_queues(sdata
);
418 ret
= drv_add_interface(local
, sdata
);
420 /* ok .. stupid driver, it asked for this! */
425 ret
= ieee80211_check_queues(sdata
, NL80211_IFTYPE_MONITOR
);
431 mutex_lock(&local
->iflist_mtx
);
432 rcu_assign_pointer(local
->monitor_sdata
, sdata
);
433 mutex_unlock(&local
->iflist_mtx
);
435 mutex_lock(&local
->mtx
);
436 ret
= ieee80211_vif_use_channel(sdata
, &local
->monitor_chandef
,
437 IEEE80211_CHANCTX_EXCLUSIVE
);
438 mutex_unlock(&local
->mtx
);
440 mutex_lock(&local
->iflist_mtx
);
441 RCU_INIT_POINTER(local
->monitor_sdata
, NULL
);
442 mutex_unlock(&local
->iflist_mtx
);
444 drv_remove_interface(local
, sdata
);
452 void ieee80211_del_virtual_monitor(struct ieee80211_local
*local
)
454 struct ieee80211_sub_if_data
*sdata
;
456 if (!(local
->hw
.flags
& IEEE80211_HW_WANT_MONITOR_VIF
))
461 mutex_lock(&local
->iflist_mtx
);
463 sdata
= rcu_dereference_protected(local
->monitor_sdata
,
464 lockdep_is_held(&local
->iflist_mtx
));
466 mutex_unlock(&local
->iflist_mtx
);
470 RCU_INIT_POINTER(local
->monitor_sdata
, NULL
);
471 mutex_unlock(&local
->iflist_mtx
);
475 mutex_lock(&local
->mtx
);
476 ieee80211_vif_release_channel(sdata
);
477 mutex_unlock(&local
->mtx
);
479 drv_remove_interface(local
, sdata
);
485 * NOTE: Be very careful when changing this function, it must NOT return
486 * an error on interface type changes that have been pre-checked, so most
487 * checks should be in ieee80211_check_concurrent_iface.
489 int ieee80211_do_open(struct wireless_dev
*wdev
, bool coming_up
)
491 struct ieee80211_sub_if_data
*sdata
= IEEE80211_WDEV_TO_SUB_IF(wdev
);
492 struct net_device
*dev
= wdev
->netdev
;
493 struct ieee80211_local
*local
= sdata
->local
;
494 struct sta_info
*sta
;
497 u32 hw_reconf_flags
= 0;
499 switch (sdata
->vif
.type
) {
500 case NL80211_IFTYPE_WDS
:
501 if (!is_valid_ether_addr(sdata
->u
.wds
.remote_addr
))
504 case NL80211_IFTYPE_AP_VLAN
: {
505 struct ieee80211_sub_if_data
*master
;
510 mutex_lock(&local
->mtx
);
511 list_add(&sdata
->u
.vlan
.list
, &sdata
->bss
->vlans
);
512 mutex_unlock(&local
->mtx
);
514 master
= container_of(sdata
->bss
,
515 struct ieee80211_sub_if_data
, u
.ap
);
516 sdata
->control_port_protocol
=
517 master
->control_port_protocol
;
518 sdata
->control_port_no_encrypt
=
519 master
->control_port_no_encrypt
;
520 sdata
->vif
.cab_queue
= master
->vif
.cab_queue
;
521 memcpy(sdata
->vif
.hw_queue
, master
->vif
.hw_queue
,
522 sizeof(sdata
->vif
.hw_queue
));
523 sdata
->vif
.bss_conf
.chandef
= master
->vif
.bss_conf
.chandef
;
526 case NL80211_IFTYPE_AP
:
527 sdata
->bss
= &sdata
->u
.ap
;
529 case NL80211_IFTYPE_MESH_POINT
:
530 case NL80211_IFTYPE_STATION
:
531 case NL80211_IFTYPE_MONITOR
:
532 case NL80211_IFTYPE_ADHOC
:
533 case NL80211_IFTYPE_P2P_DEVICE
:
534 case NL80211_IFTYPE_OCB
:
535 /* no special treatment */
537 case NL80211_IFTYPE_UNSPECIFIED
:
538 case NUM_NL80211_IFTYPES
:
539 case NL80211_IFTYPE_P2P_CLIENT
:
540 case NL80211_IFTYPE_P2P_GO
:
546 if (local
->open_count
== 0) {
547 res
= drv_start(local
);
550 /* we're brought up, everything changes */
551 hw_reconf_flags
= ~0;
552 ieee80211_led_radio(local
, true);
553 ieee80211_mod_tpt_led_trig(local
,
554 IEEE80211_TPT_LEDTRIG_FL_RADIO
, 0);
558 * Copy the hopefully now-present MAC address to
559 * this interface, if it has the special null one.
561 if (dev
&& is_zero_ether_addr(dev
->dev_addr
)) {
562 memcpy(dev
->dev_addr
,
563 local
->hw
.wiphy
->perm_addr
,
565 memcpy(dev
->perm_addr
, dev
->dev_addr
, ETH_ALEN
);
567 if (!is_valid_ether_addr(dev
->dev_addr
)) {
568 res
= -EADDRNOTAVAIL
;
573 switch (sdata
->vif
.type
) {
574 case NL80211_IFTYPE_AP_VLAN
:
575 /* no need to tell driver, but set carrier and chanctx */
576 if (rtnl_dereference(sdata
->bss
->beacon
)) {
577 ieee80211_vif_vlan_copy_chanctx(sdata
);
578 netif_carrier_on(dev
);
580 netif_carrier_off(dev
);
583 case NL80211_IFTYPE_MONITOR
:
584 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
585 local
->cooked_mntrs
++;
589 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
) {
590 res
= drv_add_interface(local
, sdata
);
593 } else if (local
->monitors
== 0 && local
->open_count
== 0) {
594 res
= ieee80211_add_virtual_monitor(local
);
599 /* must be before the call to ieee80211_configure_filter */
601 if (local
->monitors
== 1) {
602 local
->hw
.conf
.flags
|= IEEE80211_CONF_MONITOR
;
603 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
606 ieee80211_adjust_monitor_flags(sdata
, 1);
607 ieee80211_configure_filter(local
);
608 mutex_lock(&local
->mtx
);
609 ieee80211_recalc_idle(local
);
610 mutex_unlock(&local
->mtx
);
612 netif_carrier_on(dev
);
616 ieee80211_del_virtual_monitor(local
);
618 res
= drv_add_interface(local
, sdata
);
621 res
= ieee80211_check_queues(sdata
,
622 ieee80211_vif_type_p2p(&sdata
->vif
));
624 goto err_del_interface
;
627 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
629 local
->fif_probe_req
++;
631 ieee80211_configure_filter(local
);
632 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
633 local
->fif_probe_req
++;
636 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
)
637 changed
|= ieee80211_reset_erp_info(sdata
);
638 ieee80211_bss_info_change_notify(sdata
, changed
);
640 switch (sdata
->vif
.type
) {
641 case NL80211_IFTYPE_STATION
:
642 case NL80211_IFTYPE_ADHOC
:
643 case NL80211_IFTYPE_AP
:
644 case NL80211_IFTYPE_MESH_POINT
:
645 case NL80211_IFTYPE_OCB
:
646 netif_carrier_off(dev
);
648 case NL80211_IFTYPE_WDS
:
649 case NL80211_IFTYPE_P2P_DEVICE
:
657 * set default queue parameters so drivers don't
658 * need to initialise the hardware if the hardware
659 * doesn't start up with sane defaults
661 ieee80211_set_wmm_default(sdata
, true);
664 set_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
666 if (sdata
->vif
.type
== NL80211_IFTYPE_WDS
) {
667 /* Create STA entry for the WDS peer */
668 sta
= sta_info_alloc(sdata
, sdata
->u
.wds
.remote_addr
,
672 goto err_del_interface
;
675 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTH
);
676 sta_info_pre_move_state(sta
, IEEE80211_STA_ASSOC
);
677 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
679 res
= sta_info_insert(sta
);
681 /* STA has been freed */
682 goto err_del_interface
;
685 rate_control_rate_init(sta
);
686 netif_carrier_on(dev
);
687 } else if (sdata
->vif
.type
== NL80211_IFTYPE_P2P_DEVICE
) {
688 rcu_assign_pointer(local
->p2p_sdata
, sdata
);
692 * set_multicast_list will be invoked by the networking core
693 * which will check whether any increments here were done in
694 * error and sync them down to the hardware as filter flags.
696 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
697 atomic_inc(&local
->iff_allmultis
);
699 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
700 atomic_inc(&local
->iff_promiscs
);
706 ieee80211_hw_config(local
, hw_reconf_flags
);
708 ieee80211_recalc_ps(local
, -1);
710 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
711 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
712 /* XXX: for AP_VLAN, actually track AP queues */
713 netif_tx_start_all_queues(dev
);
716 int n_acs
= IEEE80211_NUM_ACS
;
719 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
722 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
723 if (sdata
->vif
.cab_queue
== IEEE80211_INVAL_HW_QUEUE
||
724 (local
->queue_stop_reasons
[sdata
->vif
.cab_queue
] == 0 &&
725 skb_queue_empty(&local
->pending
[sdata
->vif
.cab_queue
]))) {
726 for (ac
= 0; ac
< n_acs
; ac
++) {
727 int ac_queue
= sdata
->vif
.hw_queue
[ac
];
729 if (local
->queue_stop_reasons
[ac_queue
] == 0 &&
730 skb_queue_empty(&local
->pending
[ac_queue
]))
731 netif_start_subqueue(dev
, ac
);
734 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
739 drv_remove_interface(local
, sdata
);
741 if (!local
->open_count
)
745 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
746 mutex_lock(&local
->mtx
);
747 list_del(&sdata
->u
.vlan
.list
);
748 mutex_unlock(&local
->mtx
);
750 /* might already be clear but that doesn't matter */
751 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
755 static int ieee80211_open(struct net_device
*dev
)
757 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
760 /* fail early if user set an invalid address */
761 if (!is_valid_ether_addr(dev
->dev_addr
))
762 return -EADDRNOTAVAIL
;
764 err
= ieee80211_check_concurrent_iface(sdata
, sdata
->vif
.type
);
768 return ieee80211_do_open(&sdata
->wdev
, true);
771 static void ieee80211_do_stop(struct ieee80211_sub_if_data
*sdata
,
774 struct ieee80211_local
*local
= sdata
->local
;
776 struct sk_buff
*skb
, *tmp
;
777 u32 hw_reconf_flags
= 0;
780 struct cfg80211_chan_def chandef
;
783 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
785 cancel_scan
= rcu_access_pointer(local
->scan_sdata
) == sdata
;
787 ieee80211_scan_cancel(local
);
790 * Stop TX on this interface first.
793 netif_tx_stop_all_queues(sdata
->dev
);
795 ieee80211_roc_purge(local
, sdata
);
797 switch (sdata
->vif
.type
) {
798 case NL80211_IFTYPE_STATION
:
799 ieee80211_mgd_stop(sdata
);
801 case NL80211_IFTYPE_ADHOC
:
802 ieee80211_ibss_stop(sdata
);
804 case NL80211_IFTYPE_AP
:
805 cancel_work_sync(&sdata
->u
.ap
.request_smps_work
);
812 * Remove all stations associated with this interface.
814 * This must be done before calling ops->remove_interface()
815 * because otherwise we can later invoke ops->sta_notify()
816 * whenever the STAs are removed, and that invalidates driver
817 * assumptions about always getting a vif pointer that is valid
818 * (because if we remove a STA after ops->remove_interface()
819 * the driver will have removed the vif info already!)
821 * This is relevant only in WDS mode, in all other modes we've
822 * already removed all stations when disconnecting or similar,
825 flushed
= sta_info_flush(sdata
);
826 WARN_ON_ONCE((sdata
->vif
.type
!= NL80211_IFTYPE_WDS
&& flushed
> 0) ||
827 (sdata
->vif
.type
== NL80211_IFTYPE_WDS
&& flushed
!= 1));
829 /* don't count this interface for promisc/allmulti while it is down */
830 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
831 atomic_dec(&local
->iff_allmultis
);
833 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
834 atomic_dec(&local
->iff_promiscs
);
836 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
838 local
->fif_probe_req
--;
839 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
840 local
->fif_probe_req
--;
844 netif_addr_lock_bh(sdata
->dev
);
845 spin_lock_bh(&local
->filter_lock
);
846 __hw_addr_unsync(&local
->mc_list
, &sdata
->dev
->mc
,
847 sdata
->dev
->addr_len
);
848 spin_unlock_bh(&local
->filter_lock
);
849 netif_addr_unlock_bh(sdata
->dev
);
852 del_timer_sync(&local
->dynamic_ps_timer
);
853 cancel_work_sync(&local
->dynamic_ps_enable_work
);
855 cancel_work_sync(&sdata
->recalc_smps
);
857 mutex_lock(&local
->mtx
);
858 sdata
->vif
.csa_active
= false;
859 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
860 sdata
->u
.mgd
.csa_waiting_bcn
= false;
861 if (sdata
->csa_block_tx
) {
862 ieee80211_wake_vif_queues(local
, sdata
,
863 IEEE80211_QUEUE_STOP_REASON_CSA
);
864 sdata
->csa_block_tx
= false;
866 mutex_unlock(&local
->mtx
);
869 cancel_work_sync(&sdata
->csa_finalize_work
);
871 cancel_delayed_work_sync(&sdata
->dfs_cac_timer_work
);
873 if (sdata
->wdev
.cac_started
) {
874 chandef
= sdata
->vif
.bss_conf
.chandef
;
875 WARN_ON(local
->suspended
);
876 mutex_lock(&local
->mtx
);
877 ieee80211_vif_release_channel(sdata
);
878 mutex_unlock(&local
->mtx
);
879 cfg80211_cac_event(sdata
->dev
, &chandef
,
880 NL80211_RADAR_CAC_ABORTED
,
884 /* APs need special treatment */
885 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
886 struct ieee80211_sub_if_data
*vlan
, *tmpsdata
;
888 /* down all dependent devices, that is VLANs */
889 list_for_each_entry_safe(vlan
, tmpsdata
, &sdata
->u
.ap
.vlans
,
891 dev_close(vlan
->dev
);
892 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
893 } else if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
894 /* remove all packets in parent bc_buf pointing to this dev */
895 ps
= &sdata
->bss
->ps
;
897 spin_lock_irqsave(&ps
->bc_buf
.lock
, flags
);
898 skb_queue_walk_safe(&ps
->bc_buf
, skb
, tmp
) {
899 if (skb
->dev
== sdata
->dev
) {
900 __skb_unlink(skb
, &ps
->bc_buf
);
901 local
->total_ps_buffered
--;
902 ieee80211_free_txskb(&local
->hw
, skb
);
905 spin_unlock_irqrestore(&ps
->bc_buf
.lock
, flags
);
911 switch (sdata
->vif
.type
) {
912 case NL80211_IFTYPE_AP_VLAN
:
913 mutex_lock(&local
->mtx
);
914 list_del(&sdata
->u
.vlan
.list
);
915 mutex_unlock(&local
->mtx
);
916 RCU_INIT_POINTER(sdata
->vif
.chanctx_conf
, NULL
);
917 /* see comment in the default case below */
918 ieee80211_free_keys(sdata
, true);
919 /* no need to tell driver */
921 case NL80211_IFTYPE_MONITOR
:
922 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
923 local
->cooked_mntrs
--;
928 if (local
->monitors
== 0) {
929 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_MONITOR
;
930 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
933 ieee80211_adjust_monitor_flags(sdata
, -1);
935 case NL80211_IFTYPE_P2P_DEVICE
:
936 /* relies on synchronize_rcu() below */
937 RCU_INIT_POINTER(local
->p2p_sdata
, NULL
);
940 cancel_work_sync(&sdata
->work
);
942 * When we get here, the interface is marked down.
943 * Free the remaining keys, if there are any
944 * (which can happen in AP mode if userspace sets
945 * keys before the interface is operating, and maybe
948 * Force the key freeing to always synchronize_net()
949 * to wait for the RX path in case it is using this
950 * interface enqueuing frames at this very time on
953 ieee80211_free_keys(sdata
, true);
954 skb_queue_purge(&sdata
->skb_queue
);
959 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
960 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
961 skb_queue_walk_safe(&local
->pending
[i
], skb
, tmp
) {
962 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
963 if (info
->control
.vif
== &sdata
->vif
) {
964 __skb_unlink(skb
, &local
->pending
[i
]);
965 ieee80211_free_txskb(&local
->hw
, skb
);
969 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
971 if (local
->open_count
== 0)
972 ieee80211_clear_tx_pending(local
);
975 * If the interface goes down while suspended, presumably because
976 * the device was unplugged and that happens before our resume,
977 * then the driver is already unconfigured and the remainder of
978 * this function isn't needed.
979 * XXX: what about WoWLAN? If the device has software state, e.g.
980 * memory allocated, it might expect teardown commands from
983 if (local
->suspended
) {
984 WARN_ON(local
->wowlan
);
985 WARN_ON(rtnl_dereference(local
->monitor_sdata
));
989 switch (sdata
->vif
.type
) {
990 case NL80211_IFTYPE_AP_VLAN
:
992 case NL80211_IFTYPE_MONITOR
:
993 if (local
->monitors
== 0)
994 ieee80211_del_virtual_monitor(local
);
996 mutex_lock(&local
->mtx
);
997 ieee80211_recalc_idle(local
);
998 mutex_unlock(&local
->mtx
);
1000 if (!(sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
))
1006 drv_remove_interface(local
, sdata
);
1009 ieee80211_recalc_ps(local
, -1);
1012 flush_delayed_work(&local
->scan_work
);
1014 if (local
->open_count
== 0) {
1015 ieee80211_stop_device(local
);
1017 /* no reconfiguring after stop! */
1021 /* do after stop to avoid reconfiguring when we stop anyway */
1022 ieee80211_configure_filter(local
);
1023 ieee80211_hw_config(local
, hw_reconf_flags
);
1025 if (local
->monitors
== local
->open_count
)
1026 ieee80211_add_virtual_monitor(local
);
1029 static int ieee80211_stop(struct net_device
*dev
)
1031 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1033 ieee80211_do_stop(sdata
, true);
1038 static void ieee80211_set_multicast_list(struct net_device
*dev
)
1040 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1041 struct ieee80211_local
*local
= sdata
->local
;
1042 int allmulti
, promisc
, sdata_allmulti
, sdata_promisc
;
1044 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
1045 promisc
= !!(dev
->flags
& IFF_PROMISC
);
1046 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
1047 sdata_promisc
= !!(sdata
->flags
& IEEE80211_SDATA_PROMISC
);
1049 if (allmulti
!= sdata_allmulti
) {
1050 if (dev
->flags
& IFF_ALLMULTI
)
1051 atomic_inc(&local
->iff_allmultis
);
1053 atomic_dec(&local
->iff_allmultis
);
1054 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
1057 if (promisc
!= sdata_promisc
) {
1058 if (dev
->flags
& IFF_PROMISC
)
1059 atomic_inc(&local
->iff_promiscs
);
1061 atomic_dec(&local
->iff_promiscs
);
1062 sdata
->flags
^= IEEE80211_SDATA_PROMISC
;
1064 spin_lock_bh(&local
->filter_lock
);
1065 __hw_addr_sync(&local
->mc_list
, &dev
->mc
, dev
->addr_len
);
1066 spin_unlock_bh(&local
->filter_lock
);
1067 ieee80211_queue_work(&local
->hw
, &local
->reconfig_filter
);
1071 * Called when the netdev is removed or, by the code below, before
1072 * the interface type changes.
1074 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data
*sdata
)
1078 /* free extra data */
1079 ieee80211_free_keys(sdata
, false);
1081 ieee80211_debugfs_remove_netdev(sdata
);
1083 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
1084 __skb_queue_purge(&sdata
->fragments
[i
].skb_list
);
1085 sdata
->fragment_next
= 0;
1087 if (ieee80211_vif_is_mesh(&sdata
->vif
))
1088 mesh_rmc_free(sdata
);
1091 static void ieee80211_uninit(struct net_device
*dev
)
1093 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev
));
1096 static u16
ieee80211_netdev_select_queue(struct net_device
*dev
,
1097 struct sk_buff
*skb
,
1099 select_queue_fallback_t fallback
)
1101 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev
), skb
);
1104 static const struct net_device_ops ieee80211_dataif_ops
= {
1105 .ndo_open
= ieee80211_open
,
1106 .ndo_stop
= ieee80211_stop
,
1107 .ndo_uninit
= ieee80211_uninit
,
1108 .ndo_start_xmit
= ieee80211_subif_start_xmit
,
1109 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
1110 .ndo_change_mtu
= ieee80211_change_mtu
,
1111 .ndo_set_mac_address
= ieee80211_change_mac
,
1112 .ndo_select_queue
= ieee80211_netdev_select_queue
,
1115 static u16
ieee80211_monitor_select_queue(struct net_device
*dev
,
1116 struct sk_buff
*skb
,
1118 select_queue_fallback_t fallback
)
1120 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1121 struct ieee80211_local
*local
= sdata
->local
;
1122 struct ieee80211_hdr
*hdr
;
1123 struct ieee80211_radiotap_header
*rtap
= (void *)skb
->data
;
1125 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1129 skb
->len
< le16_to_cpu(rtap
->it_len
) + 2 /* frame control */)
1130 return 0; /* doesn't matter, frame will be dropped */
1132 hdr
= (void *)((u8
*)skb
->data
+ le16_to_cpu(rtap
->it_len
));
1134 return ieee80211_select_queue_80211(sdata
, skb
, hdr
);
1137 static const struct net_device_ops ieee80211_monitorif_ops
= {
1138 .ndo_open
= ieee80211_open
,
1139 .ndo_stop
= ieee80211_stop
,
1140 .ndo_uninit
= ieee80211_uninit
,
1141 .ndo_start_xmit
= ieee80211_monitor_start_xmit
,
1142 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
1143 .ndo_change_mtu
= ieee80211_change_mtu
,
1144 .ndo_set_mac_address
= ieee80211_change_mac
,
1145 .ndo_select_queue
= ieee80211_monitor_select_queue
,
1148 static void ieee80211_if_setup(struct net_device
*dev
)
1151 dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1152 dev
->netdev_ops
= &ieee80211_dataif_ops
;
1153 dev
->destructor
= free_netdev
;
1156 static void ieee80211_iface_work(struct work_struct
*work
)
1158 struct ieee80211_sub_if_data
*sdata
=
1159 container_of(work
, struct ieee80211_sub_if_data
, work
);
1160 struct ieee80211_local
*local
= sdata
->local
;
1161 struct sk_buff
*skb
;
1162 struct sta_info
*sta
;
1163 struct ieee80211_ra_tid
*ra_tid
;
1164 struct ieee80211_rx_agg
*rx_agg
;
1166 if (!ieee80211_sdata_running(sdata
))
1169 if (local
->scanning
)
1173 * ieee80211_queue_work() should have picked up most cases,
1174 * here we'll pick the rest.
1176 if (WARN(local
->suspended
,
1177 "interface work scheduled while going to suspend\n"))
1180 /* first process frames */
1181 while ((skb
= skb_dequeue(&sdata
->skb_queue
))) {
1182 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
1184 if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_START
) {
1185 ra_tid
= (void *)&skb
->cb
;
1186 ieee80211_start_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
1188 } else if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_STOP
) {
1189 ra_tid
= (void *)&skb
->cb
;
1190 ieee80211_stop_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
1192 } else if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_RX_AGG_START
) {
1193 rx_agg
= (void *)&skb
->cb
;
1194 mutex_lock(&local
->sta_mtx
);
1195 sta
= sta_info_get_bss(sdata
, rx_agg
->addr
);
1197 __ieee80211_start_rx_ba_session(sta
,
1198 0, 0, 0, 1, rx_agg
->tid
,
1199 IEEE80211_MAX_AMPDU_BUF
,
1201 mutex_unlock(&local
->sta_mtx
);
1202 } else if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_RX_AGG_STOP
) {
1203 rx_agg
= (void *)&skb
->cb
;
1204 mutex_lock(&local
->sta_mtx
);
1205 sta
= sta_info_get_bss(sdata
, rx_agg
->addr
);
1207 __ieee80211_stop_rx_ba_session(sta
,
1209 WLAN_BACK_RECIPIENT
, 0,
1211 mutex_unlock(&local
->sta_mtx
);
1212 } else if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_TDLS_CHSW
) {
1213 ieee80211_process_tdls_channel_switch(sdata
, skb
);
1214 } else if (ieee80211_is_action(mgmt
->frame_control
) &&
1215 mgmt
->u
.action
.category
== WLAN_CATEGORY_BACK
) {
1218 mutex_lock(&local
->sta_mtx
);
1219 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
1221 switch (mgmt
->u
.action
.u
.addba_req
.action_code
) {
1222 case WLAN_ACTION_ADDBA_REQ
:
1223 ieee80211_process_addba_request(
1224 local
, sta
, mgmt
, len
);
1226 case WLAN_ACTION_ADDBA_RESP
:
1227 ieee80211_process_addba_resp(local
, sta
,
1230 case WLAN_ACTION_DELBA
:
1231 ieee80211_process_delba(sdata
, sta
,
1239 mutex_unlock(&local
->sta_mtx
);
1240 } else if (ieee80211_is_data_qos(mgmt
->frame_control
)) {
1241 struct ieee80211_hdr
*hdr
= (void *)mgmt
;
1243 * So the frame isn't mgmt, but frame_control
1244 * is at the right place anyway, of course, so
1245 * the if statement is correct.
1247 * Warn if we have other data frame types here,
1248 * they must not get here.
1250 WARN_ON(hdr
->frame_control
&
1251 cpu_to_le16(IEEE80211_STYPE_NULLFUNC
));
1252 WARN_ON(!(hdr
->seq_ctrl
&
1253 cpu_to_le16(IEEE80211_SCTL_FRAG
)));
1255 * This was a fragment of a frame, received while
1256 * a block-ack session was active. That cannot be
1257 * right, so terminate the session.
1259 mutex_lock(&local
->sta_mtx
);
1260 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
1262 u16 tid
= *ieee80211_get_qos_ctl(hdr
) &
1263 IEEE80211_QOS_CTL_TID_MASK
;
1265 __ieee80211_stop_rx_ba_session(
1266 sta
, tid
, WLAN_BACK_RECIPIENT
,
1267 WLAN_REASON_QSTA_REQUIRE_SETUP
,
1270 mutex_unlock(&local
->sta_mtx
);
1271 } else switch (sdata
->vif
.type
) {
1272 case NL80211_IFTYPE_STATION
:
1273 ieee80211_sta_rx_queued_mgmt(sdata
, skb
);
1275 case NL80211_IFTYPE_ADHOC
:
1276 ieee80211_ibss_rx_queued_mgmt(sdata
, skb
);
1278 case NL80211_IFTYPE_MESH_POINT
:
1279 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
1281 ieee80211_mesh_rx_queued_mgmt(sdata
, skb
);
1284 WARN(1, "frame for unexpected interface type");
1291 /* then other type-dependent work */
1292 switch (sdata
->vif
.type
) {
1293 case NL80211_IFTYPE_STATION
:
1294 ieee80211_sta_work(sdata
);
1296 case NL80211_IFTYPE_ADHOC
:
1297 ieee80211_ibss_work(sdata
);
1299 case NL80211_IFTYPE_MESH_POINT
:
1300 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
1302 ieee80211_mesh_work(sdata
);
1304 case NL80211_IFTYPE_OCB
:
1305 ieee80211_ocb_work(sdata
);
1312 static void ieee80211_recalc_smps_work(struct work_struct
*work
)
1314 struct ieee80211_sub_if_data
*sdata
=
1315 container_of(work
, struct ieee80211_sub_if_data
, recalc_smps
);
1317 ieee80211_recalc_smps(sdata
);
1321 * Helper function to initialise an interface to a specific type.
1323 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data
*sdata
,
1324 enum nl80211_iftype type
)
1326 static const u8 bssid_wildcard
[ETH_ALEN
] = {0xff, 0xff, 0xff,
1329 /* clear type-dependent union */
1330 memset(&sdata
->u
, 0, sizeof(sdata
->u
));
1332 /* and set some type-dependent values */
1333 sdata
->vif
.type
= type
;
1334 sdata
->vif
.p2p
= false;
1335 sdata
->wdev
.iftype
= type
;
1337 sdata
->control_port_protocol
= cpu_to_be16(ETH_P_PAE
);
1338 sdata
->control_port_no_encrypt
= false;
1339 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
1340 sdata
->vif
.bss_conf
.idle
= true;
1342 sdata
->noack_map
= 0;
1344 /* only monitor/p2p-device differ */
1346 sdata
->dev
->netdev_ops
= &ieee80211_dataif_ops
;
1347 sdata
->dev
->type
= ARPHRD_ETHER
;
1350 skb_queue_head_init(&sdata
->skb_queue
);
1351 INIT_WORK(&sdata
->work
, ieee80211_iface_work
);
1352 INIT_WORK(&sdata
->recalc_smps
, ieee80211_recalc_smps_work
);
1353 INIT_WORK(&sdata
->csa_finalize_work
, ieee80211_csa_finalize_work
);
1354 INIT_LIST_HEAD(&sdata
->assigned_chanctx_list
);
1355 INIT_LIST_HEAD(&sdata
->reserved_chanctx_list
);
1358 case NL80211_IFTYPE_P2P_GO
:
1359 type
= NL80211_IFTYPE_AP
;
1360 sdata
->vif
.type
= type
;
1361 sdata
->vif
.p2p
= true;
1363 case NL80211_IFTYPE_AP
:
1364 skb_queue_head_init(&sdata
->u
.ap
.ps
.bc_buf
);
1365 INIT_LIST_HEAD(&sdata
->u
.ap
.vlans
);
1366 INIT_WORK(&sdata
->u
.ap
.request_smps_work
,
1367 ieee80211_request_smps_ap_work
);
1368 sdata
->vif
.bss_conf
.bssid
= sdata
->vif
.addr
;
1369 sdata
->u
.ap
.req_smps
= IEEE80211_SMPS_OFF
;
1371 case NL80211_IFTYPE_P2P_CLIENT
:
1372 type
= NL80211_IFTYPE_STATION
;
1373 sdata
->vif
.type
= type
;
1374 sdata
->vif
.p2p
= true;
1376 case NL80211_IFTYPE_STATION
:
1377 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.mgd
.bssid
;
1378 ieee80211_sta_setup_sdata(sdata
);
1380 case NL80211_IFTYPE_OCB
:
1381 sdata
->vif
.bss_conf
.bssid
= bssid_wildcard
;
1382 ieee80211_ocb_setup_sdata(sdata
);
1384 case NL80211_IFTYPE_ADHOC
:
1385 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.ibss
.bssid
;
1386 ieee80211_ibss_setup_sdata(sdata
);
1388 case NL80211_IFTYPE_MESH_POINT
:
1389 if (ieee80211_vif_is_mesh(&sdata
->vif
))
1390 ieee80211_mesh_init_sdata(sdata
);
1392 case NL80211_IFTYPE_MONITOR
:
1393 sdata
->dev
->type
= ARPHRD_IEEE80211_RADIOTAP
;
1394 sdata
->dev
->netdev_ops
= &ieee80211_monitorif_ops
;
1395 sdata
->u
.mntr_flags
= MONITOR_FLAG_CONTROL
|
1396 MONITOR_FLAG_OTHER_BSS
;
1398 case NL80211_IFTYPE_WDS
:
1399 sdata
->vif
.bss_conf
.bssid
= NULL
;
1401 case NL80211_IFTYPE_AP_VLAN
:
1402 case NL80211_IFTYPE_P2P_DEVICE
:
1403 sdata
->vif
.bss_conf
.bssid
= sdata
->vif
.addr
;
1405 case NL80211_IFTYPE_UNSPECIFIED
:
1406 case NUM_NL80211_IFTYPES
:
1411 ieee80211_debugfs_add_netdev(sdata
);
1414 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data
*sdata
,
1415 enum nl80211_iftype type
)
1417 struct ieee80211_local
*local
= sdata
->local
;
1419 enum nl80211_iftype internal_type
= type
;
1424 if (!local
->ops
->change_interface
)
1427 switch (sdata
->vif
.type
) {
1428 case NL80211_IFTYPE_AP
:
1429 case NL80211_IFTYPE_STATION
:
1430 case NL80211_IFTYPE_ADHOC
:
1431 case NL80211_IFTYPE_OCB
:
1433 * Could maybe also all others here?
1434 * Just not sure how that interacts
1435 * with the RX/config path e.g. for
1444 case NL80211_IFTYPE_AP
:
1445 case NL80211_IFTYPE_STATION
:
1446 case NL80211_IFTYPE_ADHOC
:
1447 case NL80211_IFTYPE_OCB
:
1449 * Could probably support everything
1450 * but WDS here (WDS do_open can fail
1451 * under memory pressure, which this
1452 * code isn't prepared to handle).
1455 case NL80211_IFTYPE_P2P_CLIENT
:
1457 internal_type
= NL80211_IFTYPE_STATION
;
1459 case NL80211_IFTYPE_P2P_GO
:
1461 internal_type
= NL80211_IFTYPE_AP
;
1467 ret
= ieee80211_check_concurrent_iface(sdata
, internal_type
);
1471 ieee80211_do_stop(sdata
, false);
1473 ieee80211_teardown_sdata(sdata
);
1475 ret
= drv_change_interface(local
, sdata
, internal_type
, p2p
);
1477 type
= ieee80211_vif_type_p2p(&sdata
->vif
);
1480 * Ignore return value here, there's not much we can do since
1481 * the driver changed the interface type internally already.
1482 * The warnings will hopefully make driver authors fix it :-)
1484 ieee80211_check_queues(sdata
, type
);
1486 ieee80211_setup_sdata(sdata
, type
);
1488 err
= ieee80211_do_open(&sdata
->wdev
, false);
1489 WARN(err
, "type change: do_open returned %d", err
);
1494 int ieee80211_if_change_type(struct ieee80211_sub_if_data
*sdata
,
1495 enum nl80211_iftype type
)
1501 if (type
== ieee80211_vif_type_p2p(&sdata
->vif
))
1504 if (ieee80211_sdata_running(sdata
)) {
1505 ret
= ieee80211_runtime_change_iftype(sdata
, type
);
1509 /* Purge and reset type-dependent state. */
1510 ieee80211_teardown_sdata(sdata
);
1511 ieee80211_setup_sdata(sdata
, type
);
1514 /* reset some values that shouldn't be kept across type changes */
1515 sdata
->drop_unencrypted
= 0;
1516 if (type
== NL80211_IFTYPE_STATION
)
1517 sdata
->u
.mgd
.use_4addr
= false;
1522 static void ieee80211_assign_perm_addr(struct ieee80211_local
*local
,
1523 u8
*perm_addr
, enum nl80211_iftype type
)
1525 struct ieee80211_sub_if_data
*sdata
;
1526 u64 mask
, start
, addr
, val
, inc
;
1528 u8 tmp_addr
[ETH_ALEN
];
1531 /* default ... something at least */
1532 memcpy(perm_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
1534 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
) &&
1535 local
->hw
.wiphy
->n_addresses
<= 1)
1538 mutex_lock(&local
->iflist_mtx
);
1541 case NL80211_IFTYPE_MONITOR
:
1542 /* doesn't matter */
1544 case NL80211_IFTYPE_WDS
:
1545 case NL80211_IFTYPE_AP_VLAN
:
1546 /* match up with an AP interface */
1547 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1548 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
1550 memcpy(perm_addr
, sdata
->vif
.addr
, ETH_ALEN
);
1553 /* keep default if no AP interface present */
1555 case NL80211_IFTYPE_P2P_CLIENT
:
1556 case NL80211_IFTYPE_P2P_GO
:
1557 if (local
->hw
.flags
& IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF
) {
1558 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1559 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
)
1561 if (!ieee80211_sdata_running(sdata
))
1563 memcpy(perm_addr
, sdata
->vif
.addr
, ETH_ALEN
);
1567 /* otherwise fall through */
1569 /* assign a new address if possible -- try n_addresses first */
1570 for (i
= 0; i
< local
->hw
.wiphy
->n_addresses
; i
++) {
1573 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1574 if (ether_addr_equal(local
->hw
.wiphy
->addresses
[i
].addr
,
1583 local
->hw
.wiphy
->addresses
[i
].addr
,
1589 /* try mask if available */
1590 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
))
1593 m
= local
->hw
.wiphy
->addr_mask
;
1594 mask
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1595 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1596 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1598 if (__ffs64(mask
) + hweight64(mask
) != fls64(mask
)) {
1599 /* not a contiguous mask ... not handled now! */
1600 pr_info("not contiguous\n");
1605 * Pick address of existing interface in case user changed
1606 * MAC address manually, default to perm_addr.
1608 m
= local
->hw
.wiphy
->perm_addr
;
1609 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1610 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
)
1612 m
= sdata
->vif
.addr
;
1615 start
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1616 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1617 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1619 inc
= 1ULL<<__ffs64(mask
);
1620 val
= (start
& mask
);
1621 addr
= (start
& ~mask
) | (val
& mask
);
1625 tmp_addr
[5] = addr
>> 0*8;
1626 tmp_addr
[4] = addr
>> 1*8;
1627 tmp_addr
[3] = addr
>> 2*8;
1628 tmp_addr
[2] = addr
>> 3*8;
1629 tmp_addr
[1] = addr
>> 4*8;
1630 tmp_addr
[0] = addr
>> 5*8;
1634 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1635 if (ether_addr_equal(tmp_addr
, sdata
->vif
.addr
)) {
1642 memcpy(perm_addr
, tmp_addr
, ETH_ALEN
);
1645 addr
= (start
& ~mask
) | (val
& mask
);
1646 } while (addr
!= start
);
1652 mutex_unlock(&local
->iflist_mtx
);
1655 int ieee80211_if_add(struct ieee80211_local
*local
, const char *name
,
1656 struct wireless_dev
**new_wdev
, enum nl80211_iftype type
,
1657 struct vif_params
*params
)
1659 struct net_device
*ndev
= NULL
;
1660 struct ieee80211_sub_if_data
*sdata
= NULL
;
1666 if (type
== NL80211_IFTYPE_P2P_DEVICE
) {
1667 struct wireless_dev
*wdev
;
1669 sdata
= kzalloc(sizeof(*sdata
) + local
->hw
.vif_data_size
,
1673 wdev
= &sdata
->wdev
;
1676 strlcpy(sdata
->name
, name
, IFNAMSIZ
);
1677 ieee80211_assign_perm_addr(local
, wdev
->address
, type
);
1678 memcpy(sdata
->vif
.addr
, wdev
->address
, ETH_ALEN
);
1680 if (local
->hw
.queues
>= IEEE80211_NUM_ACS
)
1681 txqs
= IEEE80211_NUM_ACS
;
1683 ndev
= alloc_netdev_mqs(sizeof(*sdata
) + local
->hw
.vif_data_size
,
1684 name
, NET_NAME_UNKNOWN
,
1685 ieee80211_if_setup
, txqs
, 1);
1688 dev_net_set(ndev
, wiphy_net(local
->hw
.wiphy
));
1690 ndev
->needed_headroom
= local
->tx_headroom
+
1691 4*6 /* four MAC addresses */
1692 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1694 + 8 /* rfc1042/bridge tunnel */
1695 - ETH_HLEN
/* ethernet hard_header_len */
1696 + IEEE80211_ENCRYPT_HEADROOM
;
1697 ndev
->needed_tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
1699 ret
= dev_alloc_name(ndev
, ndev
->name
);
1705 ieee80211_assign_perm_addr(local
, ndev
->perm_addr
, type
);
1706 if (params
&& is_valid_ether_addr(params
->macaddr
))
1707 memcpy(ndev
->dev_addr
, params
->macaddr
, ETH_ALEN
);
1709 memcpy(ndev
->dev_addr
, ndev
->perm_addr
, ETH_ALEN
);
1710 SET_NETDEV_DEV(ndev
, wiphy_dev(local
->hw
.wiphy
));
1712 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1713 sdata
= netdev_priv(ndev
);
1714 ndev
->ieee80211_ptr
= &sdata
->wdev
;
1715 memcpy(sdata
->vif
.addr
, ndev
->dev_addr
, ETH_ALEN
);
1716 memcpy(sdata
->name
, ndev
->name
, IFNAMSIZ
);
1721 /* initialise type-independent data */
1722 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
1723 sdata
->local
= local
;
1725 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
1726 skb_queue_head_init(&sdata
->fragments
[i
].skb_list
);
1728 INIT_LIST_HEAD(&sdata
->key_list
);
1730 INIT_DELAYED_WORK(&sdata
->dfs_cac_timer_work
,
1731 ieee80211_dfs_cac_timer_work
);
1732 INIT_DELAYED_WORK(&sdata
->dec_tailroom_needed_wk
,
1733 ieee80211_delayed_tailroom_dec
);
1735 for (i
= 0; i
< IEEE80211_NUM_BANDS
; i
++) {
1736 struct ieee80211_supported_band
*sband
;
1737 sband
= local
->hw
.wiphy
->bands
[i
];
1738 sdata
->rc_rateidx_mask
[i
] =
1739 sband
? (1 << sband
->n_bitrates
) - 1 : 0;
1741 memcpy(sdata
->rc_rateidx_mcs_mask
[i
],
1742 sband
->ht_cap
.mcs
.rx_mask
,
1743 sizeof(sdata
->rc_rateidx_mcs_mask
[i
]));
1745 memset(sdata
->rc_rateidx_mcs_mask
[i
], 0,
1746 sizeof(sdata
->rc_rateidx_mcs_mask
[i
]));
1749 ieee80211_set_default_queues(sdata
);
1751 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
1752 sdata
->user_power_level
= local
->user_power_level
;
1754 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
1756 /* setup type-dependent data */
1757 ieee80211_setup_sdata(sdata
, type
);
1761 ndev
->ieee80211_ptr
->use_4addr
= params
->use_4addr
;
1762 if (type
== NL80211_IFTYPE_STATION
)
1763 sdata
->u
.mgd
.use_4addr
= params
->use_4addr
;
1766 ndev
->features
|= local
->hw
.netdev_features
;
1768 netdev_set_default_ethtool_ops(ndev
, &ieee80211_ethtool_ops
);
1770 ret
= register_netdevice(ndev
);
1777 mutex_lock(&local
->iflist_mtx
);
1778 list_add_tail_rcu(&sdata
->list
, &local
->interfaces
);
1779 mutex_unlock(&local
->iflist_mtx
);
1782 *new_wdev
= &sdata
->wdev
;
1787 void ieee80211_if_remove(struct ieee80211_sub_if_data
*sdata
)
1791 mutex_lock(&sdata
->local
->iflist_mtx
);
1792 list_del_rcu(&sdata
->list
);
1793 mutex_unlock(&sdata
->local
->iflist_mtx
);
1798 unregister_netdevice(sdata
->dev
);
1800 cfg80211_unregister_wdev(&sdata
->wdev
);
1805 void ieee80211_sdata_stop(struct ieee80211_sub_if_data
*sdata
)
1807 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING
, &sdata
->state
)))
1809 ieee80211_do_stop(sdata
, true);
1810 ieee80211_teardown_sdata(sdata
);
1814 * Remove all interfaces, may only be called at hardware unregistration
1815 * time because it doesn't do RCU-safe list removals.
1817 void ieee80211_remove_interfaces(struct ieee80211_local
*local
)
1819 struct ieee80211_sub_if_data
*sdata
, *tmp
;
1820 LIST_HEAD(unreg_list
);
1821 LIST_HEAD(wdev_list
);
1826 * Close all AP_VLAN interfaces first, as otherwise they
1827 * might be closed while the AP interface they belong to
1828 * is closed, causing unregister_netdevice_many() to crash.
1830 list_for_each_entry(sdata
, &local
->interfaces
, list
)
1831 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
1832 dev_close(sdata
->dev
);
1834 mutex_lock(&local
->iflist_mtx
);
1835 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
1836 list_del(&sdata
->list
);
1839 unregister_netdevice_queue(sdata
->dev
, &unreg_list
);
1841 list_add(&sdata
->list
, &wdev_list
);
1843 mutex_unlock(&local
->iflist_mtx
);
1844 unregister_netdevice_many(&unreg_list
);
1846 list_for_each_entry_safe(sdata
, tmp
, &wdev_list
, list
) {
1847 list_del(&sdata
->list
);
1848 cfg80211_unregister_wdev(&sdata
->wdev
);
1853 static int netdev_notify(struct notifier_block
*nb
,
1854 unsigned long state
, void *ptr
)
1856 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
1857 struct ieee80211_sub_if_data
*sdata
;
1859 if (state
!= NETDEV_CHANGENAME
)
1862 if (!dev
->ieee80211_ptr
|| !dev
->ieee80211_ptr
->wiphy
)
1865 if (dev
->ieee80211_ptr
->wiphy
->privid
!= mac80211_wiphy_privid
)
1868 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1869 memcpy(sdata
->name
, dev
->name
, IFNAMSIZ
);
1870 ieee80211_debugfs_rename_netdev(sdata
);
1875 static struct notifier_block mac80211_netdev_notifier
= {
1876 .notifier_call
= netdev_notify
,
1879 int ieee80211_iface_init(void)
1881 return register_netdevice_notifier(&mac80211_netdev_notifier
);
1884 void ieee80211_iface_exit(void)
1886 unregister_netdevice_notifier(&mac80211_netdev_notifier
);