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 static void ieee80211_iface_work(struct work_struct
*work
);
48 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data
*sdata
)
50 struct ieee80211_chanctx_conf
*chanctx_conf
;
54 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
60 power
= ieee80211_chandef_max_power(&chanctx_conf
->def
);
63 if (sdata
->user_power_level
!= IEEE80211_UNSET_POWER_LEVEL
)
64 power
= min(power
, sdata
->user_power_level
);
66 if (sdata
->ap_power_level
!= IEEE80211_UNSET_POWER_LEVEL
)
67 power
= min(power
, sdata
->ap_power_level
);
69 if (power
!= sdata
->vif
.bss_conf
.txpower
) {
70 sdata
->vif
.bss_conf
.txpower
= power
;
71 ieee80211_hw_config(sdata
->local
, 0);
78 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data
*sdata
,
81 if (__ieee80211_recalc_txpower(sdata
) ||
82 (update_bss
&& ieee80211_sdata_running(sdata
)))
83 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_TXPOWER
);
86 static u32
__ieee80211_idle_off(struct ieee80211_local
*local
)
88 if (!(local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
))
91 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_IDLE
;
92 return IEEE80211_CONF_CHANGE_IDLE
;
95 static u32
__ieee80211_idle_on(struct ieee80211_local
*local
)
97 if (local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
)
100 ieee80211_flush_queues(local
, NULL
, false);
102 local
->hw
.conf
.flags
|= IEEE80211_CONF_IDLE
;
103 return IEEE80211_CONF_CHANGE_IDLE
;
106 static u32
__ieee80211_recalc_idle(struct ieee80211_local
*local
,
109 bool working
, scanning
, active
;
110 unsigned int led_trig_start
= 0, led_trig_stop
= 0;
112 lockdep_assert_held(&local
->mtx
);
114 active
= force_active
||
115 !list_empty(&local
->chanctx_list
) ||
118 working
= !local
->ops
->remain_on_channel
&&
119 !list_empty(&local
->roc_list
);
121 scanning
= test_bit(SCAN_SW_SCANNING
, &local
->scanning
) ||
122 test_bit(SCAN_ONCHANNEL_SCANNING
, &local
->scanning
);
124 if (working
|| scanning
)
125 led_trig_start
|= IEEE80211_TPT_LEDTRIG_FL_WORK
;
127 led_trig_stop
|= IEEE80211_TPT_LEDTRIG_FL_WORK
;
130 led_trig_start
|= IEEE80211_TPT_LEDTRIG_FL_CONNECTED
;
132 led_trig_stop
|= IEEE80211_TPT_LEDTRIG_FL_CONNECTED
;
134 ieee80211_mod_tpt_led_trig(local
, led_trig_start
, led_trig_stop
);
136 if (working
|| scanning
|| active
)
137 return __ieee80211_idle_off(local
);
138 return __ieee80211_idle_on(local
);
141 u32
ieee80211_idle_off(struct ieee80211_local
*local
)
143 return __ieee80211_recalc_idle(local
, true);
146 void ieee80211_recalc_idle(struct ieee80211_local
*local
)
148 u32 change
= __ieee80211_recalc_idle(local
, false);
150 ieee80211_hw_config(local
, change
);
153 static int ieee80211_verify_mac(struct ieee80211_sub_if_data
*sdata
, u8
*addr
,
156 struct ieee80211_local
*local
= sdata
->local
;
157 struct ieee80211_sub_if_data
*iter
;
162 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
))
166 new = ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
167 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
168 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
170 m
= local
->hw
.wiphy
->addr_mask
;
171 mask
= ((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);
178 mutex_lock(&local
->iflist_mtx
);
179 list_for_each_entry(iter
, &local
->interfaces
, list
) {
183 if (iter
->vif
.type
== NL80211_IFTYPE_MONITOR
&&
184 !(iter
->u
.mntr
.flags
& MONITOR_FLAG_ACTIVE
))
188 tmp
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
189 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
190 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
192 if ((new & ~mask
) != (tmp
& ~mask
)) {
197 mutex_unlock(&local
->iflist_mtx
);
202 static int ieee80211_change_mac(struct net_device
*dev
, void *addr
)
204 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
205 struct sockaddr
*sa
= addr
;
206 bool check_dup
= true;
209 if (ieee80211_sdata_running(sdata
))
212 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
&&
213 !(sdata
->u
.mntr
.flags
& MONITOR_FLAG_ACTIVE
))
216 ret
= ieee80211_verify_mac(sdata
, sa
->sa_data
, check_dup
);
220 ret
= eth_mac_addr(dev
, sa
);
223 memcpy(sdata
->vif
.addr
, sa
->sa_data
, ETH_ALEN
);
228 static inline int identical_mac_addr_allowed(int type1
, int type2
)
230 return type1
== NL80211_IFTYPE_MONITOR
||
231 type2
== NL80211_IFTYPE_MONITOR
||
232 type1
== NL80211_IFTYPE_P2P_DEVICE
||
233 type2
== NL80211_IFTYPE_P2P_DEVICE
||
234 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_WDS
) ||
235 (type1
== NL80211_IFTYPE_WDS
&&
236 (type2
== NL80211_IFTYPE_WDS
||
237 type2
== NL80211_IFTYPE_AP
)) ||
238 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_AP_VLAN
) ||
239 (type1
== NL80211_IFTYPE_AP_VLAN
&&
240 (type2
== NL80211_IFTYPE_AP
||
241 type2
== NL80211_IFTYPE_AP_VLAN
));
244 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data
*sdata
,
245 enum nl80211_iftype iftype
)
247 struct ieee80211_local
*local
= sdata
->local
;
248 struct ieee80211_sub_if_data
*nsdata
;
253 /* we hold the RTNL here so can safely walk the list */
254 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
255 if (nsdata
!= sdata
&& ieee80211_sdata_running(nsdata
)) {
257 * Only OCB and monitor mode may coexist
259 if ((sdata
->vif
.type
== NL80211_IFTYPE_OCB
&&
260 nsdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
) ||
261 (sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
262 nsdata
->vif
.type
== NL80211_IFTYPE_OCB
))
266 * Allow only a single IBSS interface to be up at any
267 * time. This is restricted because beacon distribution
268 * cannot work properly if both are in the same IBSS.
270 * To remove this restriction we'd have to disallow them
271 * from setting the same SSID on different IBSS interfaces
272 * belonging to the same hardware. Then, however, we're
273 * faced with having to adopt two different TSF timers...
275 if (iftype
== NL80211_IFTYPE_ADHOC
&&
276 nsdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
279 * will not add another interface while any channel
282 if (nsdata
->vif
.csa_active
)
286 * The remaining checks are only performed for interfaces
287 * with the same MAC address.
289 if (!ether_addr_equal(sdata
->vif
.addr
,
294 * check whether it may have the same address
296 if (!identical_mac_addr_allowed(iftype
,
301 * can only add VLANs to enabled APs
303 if (iftype
== NL80211_IFTYPE_AP_VLAN
&&
304 nsdata
->vif
.type
== NL80211_IFTYPE_AP
)
305 sdata
->bss
= &nsdata
->u
.ap
;
309 mutex_lock(&local
->chanctx_mtx
);
310 ret
= ieee80211_check_combinations(sdata
, NULL
, 0, 0);
311 mutex_unlock(&local
->chanctx_mtx
);
315 static int ieee80211_check_queues(struct ieee80211_sub_if_data
*sdata
,
316 enum nl80211_iftype iftype
)
318 int n_queues
= sdata
->local
->hw
.queues
;
321 if (iftype
== NL80211_IFTYPE_NAN
)
324 if (iftype
!= NL80211_IFTYPE_P2P_DEVICE
) {
325 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
326 if (WARN_ON_ONCE(sdata
->vif
.hw_queue
[i
] ==
327 IEEE80211_INVAL_HW_QUEUE
))
329 if (WARN_ON_ONCE(sdata
->vif
.hw_queue
[i
] >=
335 if ((iftype
!= NL80211_IFTYPE_AP
&&
336 iftype
!= NL80211_IFTYPE_P2P_GO
&&
337 iftype
!= NL80211_IFTYPE_MESH_POINT
) ||
338 !ieee80211_hw_check(&sdata
->local
->hw
, QUEUE_CONTROL
)) {
339 sdata
->vif
.cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
343 if (WARN_ON_ONCE(sdata
->vif
.cab_queue
== IEEE80211_INVAL_HW_QUEUE
))
346 if (WARN_ON_ONCE(sdata
->vif
.cab_queue
>= n_queues
))
352 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data
*sdata
,
355 struct ieee80211_local
*local
= sdata
->local
;
356 u32 flags
= sdata
->u
.mntr
.flags
;
358 #define ADJUST(_f, _s) do { \
359 if (flags & MONITOR_FLAG_##_f) \
360 local->fif_##_s += offset; \
363 ADJUST(FCSFAIL
, fcsfail
);
364 ADJUST(PLCPFAIL
, plcpfail
);
365 ADJUST(CONTROL
, control
);
366 ADJUST(CONTROL
, pspoll
);
367 ADJUST(OTHER_BSS
, other_bss
);
372 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data
*sdata
)
374 struct ieee80211_local
*local
= sdata
->local
;
377 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
378 if (ieee80211_hw_check(&local
->hw
, QUEUE_CONTROL
))
379 sdata
->vif
.hw_queue
[i
] = IEEE80211_INVAL_HW_QUEUE
;
380 else if (local
->hw
.queues
>= IEEE80211_NUM_ACS
)
381 sdata
->vif
.hw_queue
[i
] = i
;
383 sdata
->vif
.hw_queue
[i
] = 0;
385 sdata
->vif
.cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
388 int ieee80211_add_virtual_monitor(struct ieee80211_local
*local
)
390 struct ieee80211_sub_if_data
*sdata
;
393 if (!ieee80211_hw_check(&local
->hw
, WANT_MONITOR_VIF
))
398 if (local
->monitor_sdata
)
401 sdata
= kzalloc(sizeof(*sdata
) + local
->hw
.vif_data_size
, GFP_KERNEL
);
406 sdata
->local
= local
;
407 sdata
->vif
.type
= NL80211_IFTYPE_MONITOR
;
408 snprintf(sdata
->name
, IFNAMSIZ
, "%s-monitor",
409 wiphy_name(local
->hw
.wiphy
));
410 sdata
->wdev
.iftype
= NL80211_IFTYPE_MONITOR
;
412 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
414 ieee80211_set_default_queues(sdata
);
416 ret
= drv_add_interface(local
, sdata
);
418 /* ok .. stupid driver, it asked for this! */
423 ret
= ieee80211_check_queues(sdata
, NL80211_IFTYPE_MONITOR
);
429 mutex_lock(&local
->iflist_mtx
);
430 rcu_assign_pointer(local
->monitor_sdata
, sdata
);
431 mutex_unlock(&local
->iflist_mtx
);
433 mutex_lock(&local
->mtx
);
434 ret
= ieee80211_vif_use_channel(sdata
, &local
->monitor_chandef
,
435 IEEE80211_CHANCTX_EXCLUSIVE
);
436 mutex_unlock(&local
->mtx
);
438 mutex_lock(&local
->iflist_mtx
);
439 RCU_INIT_POINTER(local
->monitor_sdata
, NULL
);
440 mutex_unlock(&local
->iflist_mtx
);
442 drv_remove_interface(local
, sdata
);
447 skb_queue_head_init(&sdata
->skb_queue
);
448 INIT_WORK(&sdata
->work
, ieee80211_iface_work
);
453 void ieee80211_del_virtual_monitor(struct ieee80211_local
*local
)
455 struct ieee80211_sub_if_data
*sdata
;
457 if (!ieee80211_hw_check(&local
->hw
, WANT_MONITOR_VIF
))
462 mutex_lock(&local
->iflist_mtx
);
464 sdata
= rcu_dereference_protected(local
->monitor_sdata
,
465 lockdep_is_held(&local
->iflist_mtx
));
467 mutex_unlock(&local
->iflist_mtx
);
471 RCU_INIT_POINTER(local
->monitor_sdata
, NULL
);
472 mutex_unlock(&local
->iflist_mtx
);
476 mutex_lock(&local
->mtx
);
477 ieee80211_vif_release_channel(sdata
);
478 mutex_unlock(&local
->mtx
);
480 drv_remove_interface(local
, sdata
);
486 * NOTE: Be very careful when changing this function, it must NOT return
487 * an error on interface type changes that have been pre-checked, so most
488 * checks should be in ieee80211_check_concurrent_iface.
490 int ieee80211_do_open(struct wireless_dev
*wdev
, bool coming_up
)
492 struct ieee80211_sub_if_data
*sdata
= IEEE80211_WDEV_TO_SUB_IF(wdev
);
493 struct net_device
*dev
= wdev
->netdev
;
494 struct ieee80211_local
*local
= sdata
->local
;
495 struct sta_info
*sta
;
498 u32 hw_reconf_flags
= 0;
500 switch (sdata
->vif
.type
) {
501 case NL80211_IFTYPE_WDS
:
502 if (!is_valid_ether_addr(sdata
->u
.wds
.remote_addr
))
505 case NL80211_IFTYPE_AP_VLAN
: {
506 struct ieee80211_sub_if_data
*master
;
511 mutex_lock(&local
->mtx
);
512 list_add(&sdata
->u
.vlan
.list
, &sdata
->bss
->vlans
);
513 mutex_unlock(&local
->mtx
);
515 master
= container_of(sdata
->bss
,
516 struct ieee80211_sub_if_data
, u
.ap
);
517 sdata
->control_port_protocol
=
518 master
->control_port_protocol
;
519 sdata
->control_port_no_encrypt
=
520 master
->control_port_no_encrypt
;
521 sdata
->vif
.cab_queue
= master
->vif
.cab_queue
;
522 memcpy(sdata
->vif
.hw_queue
, master
->vif
.hw_queue
,
523 sizeof(sdata
->vif
.hw_queue
));
524 sdata
->vif
.bss_conf
.chandef
= master
->vif
.bss_conf
.chandef
;
526 mutex_lock(&local
->key_mtx
);
527 sdata
->crypto_tx_tailroom_needed_cnt
+=
528 master
->crypto_tx_tailroom_needed_cnt
;
529 mutex_unlock(&local
->key_mtx
);
533 case NL80211_IFTYPE_AP
:
534 sdata
->bss
= &sdata
->u
.ap
;
536 case NL80211_IFTYPE_MESH_POINT
:
537 case NL80211_IFTYPE_STATION
:
538 case NL80211_IFTYPE_MONITOR
:
539 case NL80211_IFTYPE_ADHOC
:
540 case NL80211_IFTYPE_P2P_DEVICE
:
541 case NL80211_IFTYPE_OCB
:
542 case NL80211_IFTYPE_NAN
:
543 /* no special treatment */
545 case NL80211_IFTYPE_UNSPECIFIED
:
546 case NUM_NL80211_IFTYPES
:
547 case NL80211_IFTYPE_P2P_CLIENT
:
548 case NL80211_IFTYPE_P2P_GO
:
554 if (local
->open_count
== 0) {
555 res
= drv_start(local
);
558 /* we're brought up, everything changes */
559 hw_reconf_flags
= ~0;
560 ieee80211_led_radio(local
, true);
561 ieee80211_mod_tpt_led_trig(local
,
562 IEEE80211_TPT_LEDTRIG_FL_RADIO
, 0);
566 * Copy the hopefully now-present MAC address to
567 * this interface, if it has the special null one.
569 if (dev
&& is_zero_ether_addr(dev
->dev_addr
)) {
570 memcpy(dev
->dev_addr
,
571 local
->hw
.wiphy
->perm_addr
,
573 memcpy(dev
->perm_addr
, dev
->dev_addr
, ETH_ALEN
);
575 if (!is_valid_ether_addr(dev
->dev_addr
)) {
576 res
= -EADDRNOTAVAIL
;
581 switch (sdata
->vif
.type
) {
582 case NL80211_IFTYPE_AP_VLAN
:
583 /* no need to tell driver, but set carrier and chanctx */
584 if (rtnl_dereference(sdata
->bss
->beacon
)) {
585 ieee80211_vif_vlan_copy_chanctx(sdata
);
586 netif_carrier_on(dev
);
588 netif_carrier_off(dev
);
591 case NL80211_IFTYPE_MONITOR
:
592 if (sdata
->u
.mntr
.flags
& MONITOR_FLAG_COOK_FRAMES
) {
593 local
->cooked_mntrs
++;
597 if (sdata
->u
.mntr
.flags
& MONITOR_FLAG_ACTIVE
) {
598 res
= drv_add_interface(local
, sdata
);
601 } else if (local
->monitors
== 0 && local
->open_count
== 0) {
602 res
= ieee80211_add_virtual_monitor(local
);
607 /* must be before the call to ieee80211_configure_filter */
609 if (local
->monitors
== 1) {
610 local
->hw
.conf
.flags
|= IEEE80211_CONF_MONITOR
;
611 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
614 ieee80211_adjust_monitor_flags(sdata
, 1);
615 ieee80211_configure_filter(local
);
616 mutex_lock(&local
->mtx
);
617 ieee80211_recalc_idle(local
);
618 mutex_unlock(&local
->mtx
);
620 netif_carrier_on(dev
);
624 ieee80211_del_virtual_monitor(local
);
626 res
= drv_add_interface(local
, sdata
);
629 res
= ieee80211_check_queues(sdata
,
630 ieee80211_vif_type_p2p(&sdata
->vif
));
632 goto err_del_interface
;
635 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
637 local
->fif_probe_req
++;
639 ieee80211_configure_filter(local
);
640 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
641 local
->fif_probe_req
++;
644 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
&&
645 sdata
->vif
.type
!= NL80211_IFTYPE_NAN
)
646 changed
|= ieee80211_reset_erp_info(sdata
);
647 ieee80211_bss_info_change_notify(sdata
, changed
);
649 switch (sdata
->vif
.type
) {
650 case NL80211_IFTYPE_STATION
:
651 case NL80211_IFTYPE_ADHOC
:
652 case NL80211_IFTYPE_AP
:
653 case NL80211_IFTYPE_MESH_POINT
:
654 case NL80211_IFTYPE_OCB
:
655 netif_carrier_off(dev
);
657 case NL80211_IFTYPE_WDS
:
658 case NL80211_IFTYPE_P2P_DEVICE
:
659 case NL80211_IFTYPE_NAN
:
667 * Set default queue parameters so drivers don't
668 * need to initialise the hardware if the hardware
669 * doesn't start up with sane defaults.
670 * Enable QoS for anything but station interfaces.
672 ieee80211_set_wmm_default(sdata
, true,
673 sdata
->vif
.type
!= NL80211_IFTYPE_STATION
);
676 set_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
678 if (sdata
->vif
.type
== NL80211_IFTYPE_WDS
) {
679 /* Create STA entry for the WDS peer */
680 sta
= sta_info_alloc(sdata
, sdata
->u
.wds
.remote_addr
,
684 goto err_del_interface
;
687 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTH
);
688 sta_info_pre_move_state(sta
, IEEE80211_STA_ASSOC
);
689 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
691 res
= sta_info_insert(sta
);
693 /* STA has been freed */
694 goto err_del_interface
;
697 rate_control_rate_init(sta
);
698 netif_carrier_on(dev
);
699 } else if (sdata
->vif
.type
== NL80211_IFTYPE_P2P_DEVICE
) {
700 rcu_assign_pointer(local
->p2p_sdata
, sdata
);
704 * set_multicast_list will be invoked by the networking core
705 * which will check whether any increments here were done in
706 * error and sync them down to the hardware as filter flags.
708 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
709 atomic_inc(&local
->iff_allmultis
);
715 ieee80211_hw_config(local
, hw_reconf_flags
);
717 ieee80211_recalc_ps(local
);
719 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
720 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
721 /* XXX: for AP_VLAN, actually track AP queues */
722 netif_tx_start_all_queues(dev
);
725 int n_acs
= IEEE80211_NUM_ACS
;
728 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
731 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
732 if (sdata
->vif
.cab_queue
== IEEE80211_INVAL_HW_QUEUE
||
733 (local
->queue_stop_reasons
[sdata
->vif
.cab_queue
] == 0 &&
734 skb_queue_empty(&local
->pending
[sdata
->vif
.cab_queue
]))) {
735 for (ac
= 0; ac
< n_acs
; ac
++) {
736 int ac_queue
= sdata
->vif
.hw_queue
[ac
];
738 if (local
->queue_stop_reasons
[ac_queue
] == 0 &&
739 skb_queue_empty(&local
->pending
[ac_queue
]))
740 netif_start_subqueue(dev
, ac
);
743 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
748 drv_remove_interface(local
, sdata
);
750 if (!local
->open_count
)
754 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
755 mutex_lock(&local
->mtx
);
756 list_del(&sdata
->u
.vlan
.list
);
757 mutex_unlock(&local
->mtx
);
759 /* might already be clear but that doesn't matter */
760 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
764 static int ieee80211_open(struct net_device
*dev
)
766 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
769 /* fail early if user set an invalid address */
770 if (!is_valid_ether_addr(dev
->dev_addr
))
771 return -EADDRNOTAVAIL
;
773 err
= ieee80211_check_concurrent_iface(sdata
, sdata
->vif
.type
);
777 return ieee80211_do_open(&sdata
->wdev
, true);
780 static void ieee80211_do_stop(struct ieee80211_sub_if_data
*sdata
,
783 struct ieee80211_local
*local
= sdata
->local
;
784 struct fq
*fq
= &local
->fq
;
786 struct sk_buff
*skb
, *tmp
;
787 u32 hw_reconf_flags
= 0;
790 struct cfg80211_chan_def chandef
;
792 struct cfg80211_nan_func
*func
;
794 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
796 cancel_scan
= rcu_access_pointer(local
->scan_sdata
) == sdata
;
798 ieee80211_scan_cancel(local
);
801 * Stop TX on this interface first.
804 netif_tx_stop_all_queues(sdata
->dev
);
806 ieee80211_roc_purge(local
, sdata
);
808 switch (sdata
->vif
.type
) {
809 case NL80211_IFTYPE_STATION
:
810 ieee80211_mgd_stop(sdata
);
812 case NL80211_IFTYPE_ADHOC
:
813 ieee80211_ibss_stop(sdata
);
815 case NL80211_IFTYPE_AP
:
816 cancel_work_sync(&sdata
->u
.ap
.request_smps_work
);
823 * Remove all stations associated with this interface.
825 * This must be done before calling ops->remove_interface()
826 * because otherwise we can later invoke ops->sta_notify()
827 * whenever the STAs are removed, and that invalidates driver
828 * assumptions about always getting a vif pointer that is valid
829 * (because if we remove a STA after ops->remove_interface()
830 * the driver will have removed the vif info already!)
832 * In WDS mode a station must exist here and be flushed, for
833 * AP_VLANs stations may exist since there's nothing else that
834 * would have removed them, but in other modes there shouldn't
837 flushed
= sta_info_flush(sdata
);
838 WARN_ON_ONCE(sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
839 ((sdata
->vif
.type
!= NL80211_IFTYPE_WDS
&& flushed
> 0) ||
840 (sdata
->vif
.type
== NL80211_IFTYPE_WDS
&& flushed
!= 1)));
842 /* don't count this interface for allmulti while it is down */
843 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
844 atomic_dec(&local
->iff_allmultis
);
846 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
848 local
->fif_probe_req
--;
849 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
850 local
->fif_probe_req
--;
854 netif_addr_lock_bh(sdata
->dev
);
855 spin_lock_bh(&local
->filter_lock
);
856 __hw_addr_unsync(&local
->mc_list
, &sdata
->dev
->mc
,
857 sdata
->dev
->addr_len
);
858 spin_unlock_bh(&local
->filter_lock
);
859 netif_addr_unlock_bh(sdata
->dev
);
862 del_timer_sync(&local
->dynamic_ps_timer
);
863 cancel_work_sync(&local
->dynamic_ps_enable_work
);
865 cancel_work_sync(&sdata
->recalc_smps
);
867 mutex_lock(&local
->mtx
);
868 sdata
->vif
.csa_active
= false;
869 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
870 sdata
->u
.mgd
.csa_waiting_bcn
= false;
871 if (sdata
->csa_block_tx
) {
872 ieee80211_wake_vif_queues(local
, sdata
,
873 IEEE80211_QUEUE_STOP_REASON_CSA
);
874 sdata
->csa_block_tx
= false;
876 mutex_unlock(&local
->mtx
);
879 cancel_work_sync(&sdata
->csa_finalize_work
);
881 cancel_delayed_work_sync(&sdata
->dfs_cac_timer_work
);
883 if (sdata
->wdev
.cac_started
) {
884 chandef
= sdata
->vif
.bss_conf
.chandef
;
885 WARN_ON(local
->suspended
);
886 mutex_lock(&local
->mtx
);
887 ieee80211_vif_release_channel(sdata
);
888 mutex_unlock(&local
->mtx
);
889 cfg80211_cac_event(sdata
->dev
, &chandef
,
890 NL80211_RADAR_CAC_ABORTED
,
894 /* APs need special treatment */
895 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
896 struct ieee80211_sub_if_data
*vlan
, *tmpsdata
;
898 /* down all dependent devices, that is VLANs */
899 list_for_each_entry_safe(vlan
, tmpsdata
, &sdata
->u
.ap
.vlans
,
901 dev_close(vlan
->dev
);
902 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
903 } else if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
904 /* remove all packets in parent bc_buf pointing to this dev */
905 ps
= &sdata
->bss
->ps
;
907 spin_lock_irqsave(&ps
->bc_buf
.lock
, flags
);
908 skb_queue_walk_safe(&ps
->bc_buf
, skb
, tmp
) {
909 if (skb
->dev
== sdata
->dev
) {
910 __skb_unlink(skb
, &ps
->bc_buf
);
911 local
->total_ps_buffered
--;
912 ieee80211_free_txskb(&local
->hw
, skb
);
915 spin_unlock_irqrestore(&ps
->bc_buf
.lock
, flags
);
921 switch (sdata
->vif
.type
) {
922 case NL80211_IFTYPE_AP_VLAN
:
923 mutex_lock(&local
->mtx
);
924 list_del(&sdata
->u
.vlan
.list
);
925 mutex_unlock(&local
->mtx
);
926 RCU_INIT_POINTER(sdata
->vif
.chanctx_conf
, NULL
);
927 /* see comment in the default case below */
928 ieee80211_free_keys(sdata
, true);
929 /* no need to tell driver */
931 case NL80211_IFTYPE_MONITOR
:
932 if (sdata
->u
.mntr
.flags
& MONITOR_FLAG_COOK_FRAMES
) {
933 local
->cooked_mntrs
--;
938 if (local
->monitors
== 0) {
939 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_MONITOR
;
940 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
943 ieee80211_adjust_monitor_flags(sdata
, -1);
945 case NL80211_IFTYPE_NAN
:
946 /* clean all the functions */
947 spin_lock_bh(&sdata
->u
.nan
.func_lock
);
949 idr_for_each_entry(&sdata
->u
.nan
.function_inst_ids
, func
, i
) {
950 idr_remove(&sdata
->u
.nan
.function_inst_ids
, i
);
951 cfg80211_free_nan_func(func
);
953 idr_destroy(&sdata
->u
.nan
.function_inst_ids
);
955 spin_unlock_bh(&sdata
->u
.nan
.func_lock
);
957 case NL80211_IFTYPE_P2P_DEVICE
:
958 /* relies on synchronize_rcu() below */
959 RCU_INIT_POINTER(local
->p2p_sdata
, NULL
);
962 cancel_work_sync(&sdata
->work
);
964 * When we get here, the interface is marked down.
965 * Free the remaining keys, if there are any
966 * (which can happen in AP mode if userspace sets
967 * keys before the interface is operating, and maybe
970 * Force the key freeing to always synchronize_net()
971 * to wait for the RX path in case it is using this
972 * interface enqueuing frames at this very time on
975 ieee80211_free_keys(sdata
, true);
976 skb_queue_purge(&sdata
->skb_queue
);
981 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
982 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
983 skb_queue_walk_safe(&local
->pending
[i
], skb
, tmp
) {
984 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
985 if (info
->control
.vif
== &sdata
->vif
) {
986 __skb_unlink(skb
, &local
->pending
[i
]);
987 ieee80211_free_txskb(&local
->hw
, skb
);
991 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
993 if (sdata
->vif
.txq
) {
994 struct txq_info
*txqi
= to_txq_info(sdata
->vif
.txq
);
996 spin_lock_bh(&fq
->lock
);
997 ieee80211_txq_purge(local
, txqi
);
998 spin_unlock_bh(&fq
->lock
);
1001 if (local
->open_count
== 0)
1002 ieee80211_clear_tx_pending(local
);
1005 * If the interface goes down while suspended, presumably because
1006 * the device was unplugged and that happens before our resume,
1007 * then the driver is already unconfigured and the remainder of
1008 * this function isn't needed.
1009 * XXX: what about WoWLAN? If the device has software state, e.g.
1010 * memory allocated, it might expect teardown commands from
1013 if (local
->suspended
) {
1014 WARN_ON(local
->wowlan
);
1015 WARN_ON(rtnl_dereference(local
->monitor_sdata
));
1019 switch (sdata
->vif
.type
) {
1020 case NL80211_IFTYPE_AP_VLAN
:
1022 case NL80211_IFTYPE_MONITOR
:
1023 if (local
->monitors
== 0)
1024 ieee80211_del_virtual_monitor(local
);
1026 mutex_lock(&local
->mtx
);
1027 ieee80211_recalc_idle(local
);
1028 mutex_unlock(&local
->mtx
);
1030 if (!(sdata
->u
.mntr
.flags
& MONITOR_FLAG_ACTIVE
))
1036 drv_remove_interface(local
, sdata
);
1039 ieee80211_recalc_ps(local
);
1042 flush_delayed_work(&local
->scan_work
);
1044 if (local
->open_count
== 0) {
1045 ieee80211_stop_device(local
);
1047 /* no reconfiguring after stop! */
1051 /* do after stop to avoid reconfiguring when we stop anyway */
1052 ieee80211_configure_filter(local
);
1053 ieee80211_hw_config(local
, hw_reconf_flags
);
1055 if (local
->monitors
== local
->open_count
)
1056 ieee80211_add_virtual_monitor(local
);
1059 static int ieee80211_stop(struct net_device
*dev
)
1061 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1063 ieee80211_do_stop(sdata
, true);
1068 static void ieee80211_set_multicast_list(struct net_device
*dev
)
1070 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1071 struct ieee80211_local
*local
= sdata
->local
;
1072 int allmulti
, sdata_allmulti
;
1074 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
1075 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
1077 if (allmulti
!= sdata_allmulti
) {
1078 if (dev
->flags
& IFF_ALLMULTI
)
1079 atomic_inc(&local
->iff_allmultis
);
1081 atomic_dec(&local
->iff_allmultis
);
1082 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
1085 spin_lock_bh(&local
->filter_lock
);
1086 __hw_addr_sync(&local
->mc_list
, &dev
->mc
, dev
->addr_len
);
1087 spin_unlock_bh(&local
->filter_lock
);
1088 ieee80211_queue_work(&local
->hw
, &local
->reconfig_filter
);
1092 * Called when the netdev is removed or, by the code below, before
1093 * the interface type changes.
1095 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data
*sdata
)
1099 /* free extra data */
1100 ieee80211_free_keys(sdata
, false);
1102 ieee80211_debugfs_remove_netdev(sdata
);
1104 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
1105 __skb_queue_purge(&sdata
->fragments
[i
].skb_list
);
1106 sdata
->fragment_next
= 0;
1108 if (ieee80211_vif_is_mesh(&sdata
->vif
))
1109 ieee80211_mesh_teardown_sdata(sdata
);
1112 static void ieee80211_uninit(struct net_device
*dev
)
1114 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev
));
1117 static u16
ieee80211_netdev_select_queue(struct net_device
*dev
,
1118 struct sk_buff
*skb
,
1120 select_queue_fallback_t fallback
)
1122 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev
), skb
);
1125 static struct rtnl_link_stats64
*
1126 ieee80211_get_stats64(struct net_device
*dev
, struct rtnl_link_stats64
*stats
)
1130 for_each_possible_cpu(i
) {
1131 const struct pcpu_sw_netstats
*tstats
;
1132 u64 rx_packets
, rx_bytes
, tx_packets
, tx_bytes
;
1135 tstats
= per_cpu_ptr(dev
->tstats
, i
);
1138 start
= u64_stats_fetch_begin_irq(&tstats
->syncp
);
1139 rx_packets
= tstats
->rx_packets
;
1140 tx_packets
= tstats
->tx_packets
;
1141 rx_bytes
= tstats
->rx_bytes
;
1142 tx_bytes
= tstats
->tx_bytes
;
1143 } while (u64_stats_fetch_retry_irq(&tstats
->syncp
, start
));
1145 stats
->rx_packets
+= rx_packets
;
1146 stats
->tx_packets
+= tx_packets
;
1147 stats
->rx_bytes
+= rx_bytes
;
1148 stats
->tx_bytes
+= tx_bytes
;
1154 static const struct net_device_ops ieee80211_dataif_ops
= {
1155 .ndo_open
= ieee80211_open
,
1156 .ndo_stop
= ieee80211_stop
,
1157 .ndo_uninit
= ieee80211_uninit
,
1158 .ndo_start_xmit
= ieee80211_subif_start_xmit
,
1159 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
1160 .ndo_set_mac_address
= ieee80211_change_mac
,
1161 .ndo_select_queue
= ieee80211_netdev_select_queue
,
1162 .ndo_get_stats64
= ieee80211_get_stats64
,
1165 static u16
ieee80211_monitor_select_queue(struct net_device
*dev
,
1166 struct sk_buff
*skb
,
1168 select_queue_fallback_t fallback
)
1170 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1171 struct ieee80211_local
*local
= sdata
->local
;
1172 struct ieee80211_hdr
*hdr
;
1173 struct ieee80211_radiotap_header
*rtap
= (void *)skb
->data
;
1175 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1179 skb
->len
< le16_to_cpu(rtap
->it_len
) + 2 /* frame control */)
1180 return 0; /* doesn't matter, frame will be dropped */
1182 hdr
= (void *)((u8
*)skb
->data
+ le16_to_cpu(rtap
->it_len
));
1184 return ieee80211_select_queue_80211(sdata
, skb
, hdr
);
1187 static const struct net_device_ops ieee80211_monitorif_ops
= {
1188 .ndo_open
= ieee80211_open
,
1189 .ndo_stop
= ieee80211_stop
,
1190 .ndo_uninit
= ieee80211_uninit
,
1191 .ndo_start_xmit
= ieee80211_monitor_start_xmit
,
1192 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
1193 .ndo_set_mac_address
= ieee80211_change_mac
,
1194 .ndo_select_queue
= ieee80211_monitor_select_queue
,
1195 .ndo_get_stats64
= ieee80211_get_stats64
,
1198 static void ieee80211_if_free(struct net_device
*dev
)
1200 free_percpu(dev
->tstats
);
1204 static void ieee80211_if_setup(struct net_device
*dev
)
1207 dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1208 dev
->netdev_ops
= &ieee80211_dataif_ops
;
1209 dev
->destructor
= ieee80211_if_free
;
1212 static void ieee80211_if_setup_no_queue(struct net_device
*dev
)
1214 ieee80211_if_setup(dev
);
1215 dev
->priv_flags
|= IFF_NO_QUEUE
;
1218 static void ieee80211_iface_work(struct work_struct
*work
)
1220 struct ieee80211_sub_if_data
*sdata
=
1221 container_of(work
, struct ieee80211_sub_if_data
, work
);
1222 struct ieee80211_local
*local
= sdata
->local
;
1223 struct sk_buff
*skb
;
1224 struct sta_info
*sta
;
1225 struct ieee80211_ra_tid
*ra_tid
;
1226 struct ieee80211_rx_agg
*rx_agg
;
1228 if (!ieee80211_sdata_running(sdata
))
1231 if (test_bit(SCAN_SW_SCANNING
, &local
->scanning
))
1234 if (!ieee80211_can_run_worker(local
))
1237 /* first process frames */
1238 while ((skb
= skb_dequeue(&sdata
->skb_queue
))) {
1239 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
1241 if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_START
) {
1242 ra_tid
= (void *)&skb
->cb
;
1243 ieee80211_start_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
1245 } else if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_STOP
) {
1246 ra_tid
= (void *)&skb
->cb
;
1247 ieee80211_stop_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
1249 } else if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_RX_AGG_START
) {
1250 rx_agg
= (void *)&skb
->cb
;
1251 mutex_lock(&local
->sta_mtx
);
1252 sta
= sta_info_get_bss(sdata
, rx_agg
->addr
);
1254 __ieee80211_start_rx_ba_session(sta
,
1255 0, 0, 0, 1, rx_agg
->tid
,
1256 IEEE80211_MAX_AMPDU_BUF
,
1258 mutex_unlock(&local
->sta_mtx
);
1259 } else if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_RX_AGG_STOP
) {
1260 rx_agg
= (void *)&skb
->cb
;
1261 mutex_lock(&local
->sta_mtx
);
1262 sta
= sta_info_get_bss(sdata
, rx_agg
->addr
);
1264 __ieee80211_stop_rx_ba_session(sta
,
1266 WLAN_BACK_RECIPIENT
, 0,
1268 mutex_unlock(&local
->sta_mtx
);
1269 } else if (ieee80211_is_action(mgmt
->frame_control
) &&
1270 mgmt
->u
.action
.category
== WLAN_CATEGORY_BACK
) {
1273 mutex_lock(&local
->sta_mtx
);
1274 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
1276 switch (mgmt
->u
.action
.u
.addba_req
.action_code
) {
1277 case WLAN_ACTION_ADDBA_REQ
:
1278 ieee80211_process_addba_request(
1279 local
, sta
, mgmt
, len
);
1281 case WLAN_ACTION_ADDBA_RESP
:
1282 ieee80211_process_addba_resp(local
, sta
,
1285 case WLAN_ACTION_DELBA
:
1286 ieee80211_process_delba(sdata
, sta
,
1294 mutex_unlock(&local
->sta_mtx
);
1295 } else if (ieee80211_is_action(mgmt
->frame_control
) &&
1296 mgmt
->u
.action
.category
== WLAN_CATEGORY_VHT
) {
1297 switch (mgmt
->u
.action
.u
.vht_group_notif
.action_code
) {
1298 case WLAN_VHT_ACTION_GROUPID_MGMT
:
1299 ieee80211_process_mu_groups(sdata
, mgmt
);
1305 } else if (ieee80211_is_data_qos(mgmt
->frame_control
)) {
1306 struct ieee80211_hdr
*hdr
= (void *)mgmt
;
1308 * So the frame isn't mgmt, but frame_control
1309 * is at the right place anyway, of course, so
1310 * the if statement is correct.
1312 * Warn if we have other data frame types here,
1313 * they must not get here.
1315 WARN_ON(hdr
->frame_control
&
1316 cpu_to_le16(IEEE80211_STYPE_NULLFUNC
));
1317 WARN_ON(!(hdr
->seq_ctrl
&
1318 cpu_to_le16(IEEE80211_SCTL_FRAG
)));
1320 * This was a fragment of a frame, received while
1321 * a block-ack session was active. That cannot be
1322 * right, so terminate the session.
1324 mutex_lock(&local
->sta_mtx
);
1325 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
1327 u16 tid
= *ieee80211_get_qos_ctl(hdr
) &
1328 IEEE80211_QOS_CTL_TID_MASK
;
1330 __ieee80211_stop_rx_ba_session(
1331 sta
, tid
, WLAN_BACK_RECIPIENT
,
1332 WLAN_REASON_QSTA_REQUIRE_SETUP
,
1335 mutex_unlock(&local
->sta_mtx
);
1336 } else switch (sdata
->vif
.type
) {
1337 case NL80211_IFTYPE_STATION
:
1338 ieee80211_sta_rx_queued_mgmt(sdata
, skb
);
1340 case NL80211_IFTYPE_ADHOC
:
1341 ieee80211_ibss_rx_queued_mgmt(sdata
, skb
);
1343 case NL80211_IFTYPE_MESH_POINT
:
1344 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
1346 ieee80211_mesh_rx_queued_mgmt(sdata
, skb
);
1349 WARN(1, "frame for unexpected interface type");
1356 /* then other type-dependent work */
1357 switch (sdata
->vif
.type
) {
1358 case NL80211_IFTYPE_STATION
:
1359 ieee80211_sta_work(sdata
);
1361 case NL80211_IFTYPE_ADHOC
:
1362 ieee80211_ibss_work(sdata
);
1364 case NL80211_IFTYPE_MESH_POINT
:
1365 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
1367 ieee80211_mesh_work(sdata
);
1369 case NL80211_IFTYPE_OCB
:
1370 ieee80211_ocb_work(sdata
);
1377 static void ieee80211_recalc_smps_work(struct work_struct
*work
)
1379 struct ieee80211_sub_if_data
*sdata
=
1380 container_of(work
, struct ieee80211_sub_if_data
, recalc_smps
);
1382 ieee80211_recalc_smps(sdata
);
1386 * Helper function to initialise an interface to a specific type.
1388 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data
*sdata
,
1389 enum nl80211_iftype type
)
1391 static const u8 bssid_wildcard
[ETH_ALEN
] = {0xff, 0xff, 0xff,
1394 /* clear type-dependent union */
1395 memset(&sdata
->u
, 0, sizeof(sdata
->u
));
1397 /* and set some type-dependent values */
1398 sdata
->vif
.type
= type
;
1399 sdata
->vif
.p2p
= false;
1400 sdata
->wdev
.iftype
= type
;
1402 sdata
->control_port_protocol
= cpu_to_be16(ETH_P_PAE
);
1403 sdata
->control_port_no_encrypt
= false;
1404 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
1405 sdata
->vif
.bss_conf
.idle
= true;
1407 sdata
->noack_map
= 0;
1409 /* only monitor/p2p-device differ */
1411 sdata
->dev
->netdev_ops
= &ieee80211_dataif_ops
;
1412 sdata
->dev
->type
= ARPHRD_ETHER
;
1415 skb_queue_head_init(&sdata
->skb_queue
);
1416 INIT_WORK(&sdata
->work
, ieee80211_iface_work
);
1417 INIT_WORK(&sdata
->recalc_smps
, ieee80211_recalc_smps_work
);
1418 INIT_WORK(&sdata
->csa_finalize_work
, ieee80211_csa_finalize_work
);
1419 INIT_LIST_HEAD(&sdata
->assigned_chanctx_list
);
1420 INIT_LIST_HEAD(&sdata
->reserved_chanctx_list
);
1423 case NL80211_IFTYPE_P2P_GO
:
1424 type
= NL80211_IFTYPE_AP
;
1425 sdata
->vif
.type
= type
;
1426 sdata
->vif
.p2p
= true;
1428 case NL80211_IFTYPE_AP
:
1429 skb_queue_head_init(&sdata
->u
.ap
.ps
.bc_buf
);
1430 INIT_LIST_HEAD(&sdata
->u
.ap
.vlans
);
1431 INIT_WORK(&sdata
->u
.ap
.request_smps_work
,
1432 ieee80211_request_smps_ap_work
);
1433 sdata
->vif
.bss_conf
.bssid
= sdata
->vif
.addr
;
1434 sdata
->u
.ap
.req_smps
= IEEE80211_SMPS_OFF
;
1436 case NL80211_IFTYPE_P2P_CLIENT
:
1437 type
= NL80211_IFTYPE_STATION
;
1438 sdata
->vif
.type
= type
;
1439 sdata
->vif
.p2p
= true;
1441 case NL80211_IFTYPE_STATION
:
1442 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.mgd
.bssid
;
1443 ieee80211_sta_setup_sdata(sdata
);
1445 case NL80211_IFTYPE_OCB
:
1446 sdata
->vif
.bss_conf
.bssid
= bssid_wildcard
;
1447 ieee80211_ocb_setup_sdata(sdata
);
1449 case NL80211_IFTYPE_ADHOC
:
1450 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.ibss
.bssid
;
1451 ieee80211_ibss_setup_sdata(sdata
);
1453 case NL80211_IFTYPE_MESH_POINT
:
1454 if (ieee80211_vif_is_mesh(&sdata
->vif
))
1455 ieee80211_mesh_init_sdata(sdata
);
1457 case NL80211_IFTYPE_MONITOR
:
1458 sdata
->dev
->type
= ARPHRD_IEEE80211_RADIOTAP
;
1459 sdata
->dev
->netdev_ops
= &ieee80211_monitorif_ops
;
1460 sdata
->u
.mntr
.flags
= MONITOR_FLAG_CONTROL
|
1461 MONITOR_FLAG_OTHER_BSS
;
1463 case NL80211_IFTYPE_WDS
:
1464 sdata
->vif
.bss_conf
.bssid
= NULL
;
1466 case NL80211_IFTYPE_NAN
:
1467 idr_init(&sdata
->u
.nan
.function_inst_ids
);
1468 spin_lock_init(&sdata
->u
.nan
.func_lock
);
1469 sdata
->vif
.bss_conf
.bssid
= sdata
->vif
.addr
;
1471 case NL80211_IFTYPE_AP_VLAN
:
1472 case NL80211_IFTYPE_P2P_DEVICE
:
1473 sdata
->vif
.bss_conf
.bssid
= sdata
->vif
.addr
;
1475 case NL80211_IFTYPE_UNSPECIFIED
:
1476 case NUM_NL80211_IFTYPES
:
1481 ieee80211_debugfs_add_netdev(sdata
);
1484 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data
*sdata
,
1485 enum nl80211_iftype type
)
1487 struct ieee80211_local
*local
= sdata
->local
;
1489 enum nl80211_iftype internal_type
= type
;
1494 if (!local
->ops
->change_interface
)
1497 switch (sdata
->vif
.type
) {
1498 case NL80211_IFTYPE_AP
:
1499 case NL80211_IFTYPE_STATION
:
1500 case NL80211_IFTYPE_ADHOC
:
1501 case NL80211_IFTYPE_OCB
:
1503 * Could maybe also all others here?
1504 * Just not sure how that interacts
1505 * with the RX/config path e.g. for
1514 case NL80211_IFTYPE_AP
:
1515 case NL80211_IFTYPE_STATION
:
1516 case NL80211_IFTYPE_ADHOC
:
1517 case NL80211_IFTYPE_OCB
:
1519 * Could probably support everything
1520 * but WDS here (WDS do_open can fail
1521 * under memory pressure, which this
1522 * code isn't prepared to handle).
1525 case NL80211_IFTYPE_P2P_CLIENT
:
1527 internal_type
= NL80211_IFTYPE_STATION
;
1529 case NL80211_IFTYPE_P2P_GO
:
1531 internal_type
= NL80211_IFTYPE_AP
;
1537 ret
= ieee80211_check_concurrent_iface(sdata
, internal_type
);
1541 ieee80211_do_stop(sdata
, false);
1543 ieee80211_teardown_sdata(sdata
);
1545 ret
= drv_change_interface(local
, sdata
, internal_type
, p2p
);
1547 type
= ieee80211_vif_type_p2p(&sdata
->vif
);
1550 * Ignore return value here, there's not much we can do since
1551 * the driver changed the interface type internally already.
1552 * The warnings will hopefully make driver authors fix it :-)
1554 ieee80211_check_queues(sdata
, type
);
1556 ieee80211_setup_sdata(sdata
, type
);
1558 err
= ieee80211_do_open(&sdata
->wdev
, false);
1559 WARN(err
, "type change: do_open returned %d", err
);
1564 int ieee80211_if_change_type(struct ieee80211_sub_if_data
*sdata
,
1565 enum nl80211_iftype type
)
1571 if (type
== ieee80211_vif_type_p2p(&sdata
->vif
))
1574 if (ieee80211_sdata_running(sdata
)) {
1575 ret
= ieee80211_runtime_change_iftype(sdata
, type
);
1579 /* Purge and reset type-dependent state. */
1580 ieee80211_teardown_sdata(sdata
);
1581 ieee80211_setup_sdata(sdata
, type
);
1584 /* reset some values that shouldn't be kept across type changes */
1585 if (type
== NL80211_IFTYPE_STATION
)
1586 sdata
->u
.mgd
.use_4addr
= false;
1591 static void ieee80211_assign_perm_addr(struct ieee80211_local
*local
,
1592 u8
*perm_addr
, enum nl80211_iftype type
)
1594 struct ieee80211_sub_if_data
*sdata
;
1595 u64 mask
, start
, addr
, val
, inc
;
1597 u8 tmp_addr
[ETH_ALEN
];
1600 /* default ... something at least */
1601 memcpy(perm_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
1603 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
) &&
1604 local
->hw
.wiphy
->n_addresses
<= 1)
1607 mutex_lock(&local
->iflist_mtx
);
1610 case NL80211_IFTYPE_MONITOR
:
1611 /* doesn't matter */
1613 case NL80211_IFTYPE_WDS
:
1614 case NL80211_IFTYPE_AP_VLAN
:
1615 /* match up with an AP interface */
1616 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1617 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
1619 memcpy(perm_addr
, sdata
->vif
.addr
, ETH_ALEN
);
1622 /* keep default if no AP interface present */
1624 case NL80211_IFTYPE_P2P_CLIENT
:
1625 case NL80211_IFTYPE_P2P_GO
:
1626 if (ieee80211_hw_check(&local
->hw
, P2P_DEV_ADDR_FOR_INTF
)) {
1627 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1628 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
)
1630 if (!ieee80211_sdata_running(sdata
))
1632 memcpy(perm_addr
, sdata
->vif
.addr
, ETH_ALEN
);
1636 /* otherwise fall through */
1638 /* assign a new address if possible -- try n_addresses first */
1639 for (i
= 0; i
< local
->hw
.wiphy
->n_addresses
; i
++) {
1642 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1643 if (ether_addr_equal(local
->hw
.wiphy
->addresses
[i
].addr
,
1652 local
->hw
.wiphy
->addresses
[i
].addr
,
1658 /* try mask if available */
1659 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
))
1662 m
= local
->hw
.wiphy
->addr_mask
;
1663 mask
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1664 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1665 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1667 if (__ffs64(mask
) + hweight64(mask
) != fls64(mask
)) {
1668 /* not a contiguous mask ... not handled now! */
1669 pr_info("not contiguous\n");
1674 * Pick address of existing interface in case user changed
1675 * MAC address manually, default to perm_addr.
1677 m
= local
->hw
.wiphy
->perm_addr
;
1678 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1679 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
)
1681 m
= sdata
->vif
.addr
;
1684 start
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1685 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1686 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1688 inc
= 1ULL<<__ffs64(mask
);
1689 val
= (start
& mask
);
1690 addr
= (start
& ~mask
) | (val
& mask
);
1694 tmp_addr
[5] = addr
>> 0*8;
1695 tmp_addr
[4] = addr
>> 1*8;
1696 tmp_addr
[3] = addr
>> 2*8;
1697 tmp_addr
[2] = addr
>> 3*8;
1698 tmp_addr
[1] = addr
>> 4*8;
1699 tmp_addr
[0] = addr
>> 5*8;
1703 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1704 if (ether_addr_equal(tmp_addr
, sdata
->vif
.addr
)) {
1711 memcpy(perm_addr
, tmp_addr
, ETH_ALEN
);
1714 addr
= (start
& ~mask
) | (val
& mask
);
1715 } while (addr
!= start
);
1721 mutex_unlock(&local
->iflist_mtx
);
1724 int ieee80211_if_add(struct ieee80211_local
*local
, const char *name
,
1725 unsigned char name_assign_type
,
1726 struct wireless_dev
**new_wdev
, enum nl80211_iftype type
,
1727 struct vif_params
*params
)
1729 struct net_device
*ndev
= NULL
;
1730 struct ieee80211_sub_if_data
*sdata
= NULL
;
1731 struct txq_info
*txqi
;
1732 void (*if_setup
)(struct net_device
*dev
);
1738 if (type
== NL80211_IFTYPE_P2P_DEVICE
|| type
== NL80211_IFTYPE_NAN
) {
1739 struct wireless_dev
*wdev
;
1741 sdata
= kzalloc(sizeof(*sdata
) + local
->hw
.vif_data_size
,
1745 wdev
= &sdata
->wdev
;
1748 strlcpy(sdata
->name
, name
, IFNAMSIZ
);
1749 ieee80211_assign_perm_addr(local
, wdev
->address
, type
);
1750 memcpy(sdata
->vif
.addr
, wdev
->address
, ETH_ALEN
);
1752 int size
= ALIGN(sizeof(*sdata
) + local
->hw
.vif_data_size
,
1756 if (local
->ops
->wake_tx_queue
)
1757 txq_size
+= sizeof(struct txq_info
) +
1758 local
->hw
.txq_data_size
;
1760 if (local
->ops
->wake_tx_queue
)
1761 if_setup
= ieee80211_if_setup_no_queue
;
1763 if_setup
= ieee80211_if_setup
;
1765 if (local
->hw
.queues
>= IEEE80211_NUM_ACS
)
1766 txqs
= IEEE80211_NUM_ACS
;
1768 ndev
= alloc_netdev_mqs(size
+ txq_size
,
1769 name
, name_assign_type
,
1773 dev_net_set(ndev
, wiphy_net(local
->hw
.wiphy
));
1775 ndev
->tstats
= netdev_alloc_pcpu_stats(struct pcpu_sw_netstats
);
1776 if (!ndev
->tstats
) {
1781 ndev
->needed_headroom
= local
->tx_headroom
+
1782 4*6 /* four MAC addresses */
1783 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1785 + 8 /* rfc1042/bridge tunnel */
1786 - ETH_HLEN
/* ethernet hard_header_len */
1787 + IEEE80211_ENCRYPT_HEADROOM
;
1788 ndev
->needed_tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
1790 ret
= dev_alloc_name(ndev
, ndev
->name
);
1792 ieee80211_if_free(ndev
);
1796 ieee80211_assign_perm_addr(local
, ndev
->perm_addr
, type
);
1797 if (params
&& is_valid_ether_addr(params
->macaddr
))
1798 memcpy(ndev
->dev_addr
, params
->macaddr
, ETH_ALEN
);
1800 memcpy(ndev
->dev_addr
, ndev
->perm_addr
, ETH_ALEN
);
1801 SET_NETDEV_DEV(ndev
, wiphy_dev(local
->hw
.wiphy
));
1803 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1804 sdata
= netdev_priv(ndev
);
1805 ndev
->ieee80211_ptr
= &sdata
->wdev
;
1806 memcpy(sdata
->vif
.addr
, ndev
->dev_addr
, ETH_ALEN
);
1807 memcpy(sdata
->name
, ndev
->name
, IFNAMSIZ
);
1810 txqi
= netdev_priv(ndev
) + size
;
1811 ieee80211_txq_init(sdata
, NULL
, txqi
, 0);
1817 /* initialise type-independent data */
1818 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
1819 sdata
->local
= local
;
1821 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
1822 skb_queue_head_init(&sdata
->fragments
[i
].skb_list
);
1824 INIT_LIST_HEAD(&sdata
->key_list
);
1826 INIT_DELAYED_WORK(&sdata
->dfs_cac_timer_work
,
1827 ieee80211_dfs_cac_timer_work
);
1828 INIT_DELAYED_WORK(&sdata
->dec_tailroom_needed_wk
,
1829 ieee80211_delayed_tailroom_dec
);
1831 for (i
= 0; i
< NUM_NL80211_BANDS
; i
++) {
1832 struct ieee80211_supported_band
*sband
;
1833 sband
= local
->hw
.wiphy
->bands
[i
];
1834 sdata
->rc_rateidx_mask
[i
] =
1835 sband
? (1 << sband
->n_bitrates
) - 1 : 0;
1840 memcpy(sdata
->rc_rateidx_mcs_mask
[i
],
1841 sband
->ht_cap
.mcs
.rx_mask
,
1842 sizeof(sdata
->rc_rateidx_mcs_mask
[i
]));
1844 cap
= sband
->vht_cap
.vht_mcs
.rx_mcs_map
;
1845 vht_rate_mask
= sdata
->rc_rateidx_vht_mcs_mask
[i
];
1846 ieee80211_get_vht_mask_from_cap(cap
, vht_rate_mask
);
1848 memset(sdata
->rc_rateidx_mcs_mask
[i
], 0,
1849 sizeof(sdata
->rc_rateidx_mcs_mask
[i
]));
1850 memset(sdata
->rc_rateidx_vht_mcs_mask
[i
], 0,
1851 sizeof(sdata
->rc_rateidx_vht_mcs_mask
[i
]));
1855 ieee80211_set_default_queues(sdata
);
1857 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
1858 sdata
->user_power_level
= local
->user_power_level
;
1860 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
1862 /* setup type-dependent data */
1863 ieee80211_setup_sdata(sdata
, type
);
1867 ndev
->ieee80211_ptr
->use_4addr
= params
->use_4addr
;
1868 if (type
== NL80211_IFTYPE_STATION
)
1869 sdata
->u
.mgd
.use_4addr
= params
->use_4addr
;
1872 ndev
->features
|= local
->hw
.netdev_features
;
1874 netdev_set_default_ethtool_ops(ndev
, &ieee80211_ethtool_ops
);
1876 /* MTU range: 256 - 2304 */
1877 ndev
->min_mtu
= 256;
1878 ndev
->max_mtu
= IEEE80211_MAX_DATA_LEN
;
1880 ret
= register_netdevice(ndev
);
1882 ieee80211_if_free(ndev
);
1887 mutex_lock(&local
->iflist_mtx
);
1888 list_add_tail_rcu(&sdata
->list
, &local
->interfaces
);
1889 mutex_unlock(&local
->iflist_mtx
);
1892 *new_wdev
= &sdata
->wdev
;
1897 void ieee80211_if_remove(struct ieee80211_sub_if_data
*sdata
)
1901 mutex_lock(&sdata
->local
->iflist_mtx
);
1902 list_del_rcu(&sdata
->list
);
1903 mutex_unlock(&sdata
->local
->iflist_mtx
);
1908 unregister_netdevice(sdata
->dev
);
1910 cfg80211_unregister_wdev(&sdata
->wdev
);
1911 ieee80211_teardown_sdata(sdata
);
1916 void ieee80211_sdata_stop(struct ieee80211_sub_if_data
*sdata
)
1918 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING
, &sdata
->state
)))
1920 ieee80211_do_stop(sdata
, true);
1923 void ieee80211_remove_interfaces(struct ieee80211_local
*local
)
1925 struct ieee80211_sub_if_data
*sdata
, *tmp
;
1926 LIST_HEAD(unreg_list
);
1927 LIST_HEAD(wdev_list
);
1931 /* Before destroying the interfaces, make sure they're all stopped so
1932 * that the hardware is stopped. Otherwise, the driver might still be
1933 * iterating the interfaces during the shutdown, e.g. from a worker
1934 * or from RX processing or similar, and if it does so (using atomic
1935 * iteration) while we're manipulating the list, the iteration will
1938 * After this, the hardware should be stopped and the driver should
1939 * have stopped all of its activities, so that we can do RCU-unaware
1940 * manipulations of the interface list below.
1942 cfg80211_shutdown_all_interfaces(local
->hw
.wiphy
);
1944 WARN(local
->open_count
, "%s: open count remains %d\n",
1945 wiphy_name(local
->hw
.wiphy
), local
->open_count
);
1947 mutex_lock(&local
->iflist_mtx
);
1948 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
1949 list_del(&sdata
->list
);
1952 unregister_netdevice_queue(sdata
->dev
, &unreg_list
);
1954 list_add(&sdata
->list
, &wdev_list
);
1956 mutex_unlock(&local
->iflist_mtx
);
1957 unregister_netdevice_many(&unreg_list
);
1959 list_for_each_entry_safe(sdata
, tmp
, &wdev_list
, list
) {
1960 list_del(&sdata
->list
);
1961 cfg80211_unregister_wdev(&sdata
->wdev
);
1966 static int netdev_notify(struct notifier_block
*nb
,
1967 unsigned long state
, void *ptr
)
1969 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
1970 struct ieee80211_sub_if_data
*sdata
;
1972 if (state
!= NETDEV_CHANGENAME
)
1975 if (!dev
->ieee80211_ptr
|| !dev
->ieee80211_ptr
->wiphy
)
1978 if (dev
->ieee80211_ptr
->wiphy
->privid
!= mac80211_wiphy_privid
)
1981 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1982 memcpy(sdata
->name
, dev
->name
, IFNAMSIZ
);
1983 ieee80211_debugfs_rename_netdev(sdata
);
1988 static struct notifier_block mac80211_netdev_notifier
= {
1989 .notifier_call
= netdev_notify
,
1992 int ieee80211_iface_init(void)
1994 return register_netdevice_notifier(&mac80211_netdev_notifier
);
1997 void ieee80211_iface_exit(void)
1999 unregister_netdevice_notifier(&mac80211_netdev_notifier
);
2002 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data
*sdata
)
2004 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
2005 atomic_inc(&sdata
->u
.ap
.num_mcast_sta
);
2006 else if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
2007 atomic_inc(&sdata
->u
.vlan
.num_mcast_sta
);
2010 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data
*sdata
)
2012 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
2013 atomic_dec(&sdata
->u
.ap
.num_mcast_sta
);
2014 else if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
2015 atomic_dec(&sdata
->u
.vlan
.num_mcast_sta
);