4 * Copyright 2002-2005, Instant802 Networks, Inc.
5 * Copyright 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
13 #include <linux/slab.h>
14 #include <linux/kernel.h>
15 #include <linux/if_arp.h>
16 #include <linux/netdevice.h>
17 #include <linux/rtnetlink.h>
18 #include <net/mac80211.h>
19 #include <net/ieee80211_radiotap.h>
20 #include "ieee80211_i.h"
22 #include "debugfs_netdev.h"
25 #include "driver-ops.h"
30 * DOC: Interface list locking
32 * The interface list in each struct ieee80211_local is protected
35 * (1) modifications may only be done under the RTNL
36 * (2) modifications and readers are protected against each other by
38 * (3) modifications are done in an RCU manner so atomic readers
39 * can traverse the list in RCU-safe blocks.
41 * As a consequence, reads (traversals) of the list can be protected
42 * by either the RTNL, the iflist_mtx or RCU.
45 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data
*sdata
)
47 struct ieee80211_chanctx_conf
*chanctx_conf
;
51 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
57 power
= ieee80211_chandef_max_power(&chanctx_conf
->def
);
60 if (sdata
->user_power_level
!= IEEE80211_UNSET_POWER_LEVEL
)
61 power
= min(power
, sdata
->user_power_level
);
63 if (sdata
->ap_power_level
!= IEEE80211_UNSET_POWER_LEVEL
)
64 power
= min(power
, sdata
->ap_power_level
);
66 if (power
!= sdata
->vif
.bss_conf
.txpower
) {
67 sdata
->vif
.bss_conf
.txpower
= power
;
68 ieee80211_hw_config(sdata
->local
, 0);
75 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data
*sdata
)
77 if (__ieee80211_recalc_txpower(sdata
))
78 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_TXPOWER
);
81 static u32
__ieee80211_idle_off(struct ieee80211_local
*local
)
83 if (!(local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
))
86 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_IDLE
;
87 return IEEE80211_CONF_CHANGE_IDLE
;
90 static u32
__ieee80211_idle_on(struct ieee80211_local
*local
)
92 if (local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
)
95 ieee80211_flush_queues(local
, NULL
);
97 local
->hw
.conf
.flags
|= IEEE80211_CONF_IDLE
;
98 return IEEE80211_CONF_CHANGE_IDLE
;
101 static u32
__ieee80211_recalc_idle(struct ieee80211_local
*local
,
104 bool working
, scanning
, active
;
105 unsigned int led_trig_start
= 0, led_trig_stop
= 0;
107 lockdep_assert_held(&local
->mtx
);
109 active
= force_active
||
110 !list_empty(&local
->chanctx_list
) ||
113 working
= !local
->ops
->remain_on_channel
&&
114 !list_empty(&local
->roc_list
);
116 scanning
= test_bit(SCAN_SW_SCANNING
, &local
->scanning
) ||
117 test_bit(SCAN_ONCHANNEL_SCANNING
, &local
->scanning
);
119 if (working
|| scanning
)
120 led_trig_start
|= IEEE80211_TPT_LEDTRIG_FL_WORK
;
122 led_trig_stop
|= IEEE80211_TPT_LEDTRIG_FL_WORK
;
125 led_trig_start
|= IEEE80211_TPT_LEDTRIG_FL_CONNECTED
;
127 led_trig_stop
|= IEEE80211_TPT_LEDTRIG_FL_CONNECTED
;
129 ieee80211_mod_tpt_led_trig(local
, led_trig_start
, led_trig_stop
);
131 if (working
|| scanning
|| active
)
132 return __ieee80211_idle_off(local
);
133 return __ieee80211_idle_on(local
);
136 u32
ieee80211_idle_off(struct ieee80211_local
*local
)
138 return __ieee80211_recalc_idle(local
, true);
141 void ieee80211_recalc_idle(struct ieee80211_local
*local
)
143 u32 change
= __ieee80211_recalc_idle(local
, false);
145 ieee80211_hw_config(local
, change
);
148 static int ieee80211_change_mtu(struct net_device
*dev
, int new_mtu
)
150 if (new_mtu
< 256 || new_mtu
> IEEE80211_MAX_DATA_LEN
)
157 static int ieee80211_verify_mac(struct ieee80211_sub_if_data
*sdata
, u8
*addr
,
160 struct ieee80211_local
*local
= sdata
->local
;
161 struct ieee80211_sub_if_data
*iter
;
166 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
))
170 new = ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
171 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
172 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
174 m
= local
->hw
.wiphy
->addr_mask
;
175 mask
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
176 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
177 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
182 mutex_lock(&local
->iflist_mtx
);
183 list_for_each_entry(iter
, &local
->interfaces
, list
) {
187 if (iter
->vif
.type
== NL80211_IFTYPE_MONITOR
&&
188 !(iter
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
))
192 tmp
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
193 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
194 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
196 if ((new & ~mask
) != (tmp
& ~mask
)) {
201 mutex_unlock(&local
->iflist_mtx
);
206 static int ieee80211_change_mac(struct net_device
*dev
, void *addr
)
208 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
209 struct sockaddr
*sa
= addr
;
210 bool check_dup
= true;
213 if (ieee80211_sdata_running(sdata
))
216 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
&&
217 !(sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
))
220 ret
= ieee80211_verify_mac(sdata
, sa
->sa_data
, check_dup
);
224 ret
= eth_mac_addr(dev
, sa
);
227 memcpy(sdata
->vif
.addr
, sa
->sa_data
, ETH_ALEN
);
232 static inline int identical_mac_addr_allowed(int type1
, int type2
)
234 return type1
== NL80211_IFTYPE_MONITOR
||
235 type2
== NL80211_IFTYPE_MONITOR
||
236 type1
== NL80211_IFTYPE_P2P_DEVICE
||
237 type2
== NL80211_IFTYPE_P2P_DEVICE
||
238 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_WDS
) ||
239 (type1
== NL80211_IFTYPE_WDS
&&
240 (type2
== NL80211_IFTYPE_WDS
||
241 type2
== NL80211_IFTYPE_AP
)) ||
242 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_AP_VLAN
) ||
243 (type1
== NL80211_IFTYPE_AP_VLAN
&&
244 (type2
== NL80211_IFTYPE_AP
||
245 type2
== NL80211_IFTYPE_AP_VLAN
));
248 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data
*sdata
,
249 enum nl80211_iftype iftype
)
251 struct ieee80211_local
*local
= sdata
->local
;
252 struct ieee80211_sub_if_data
*nsdata
;
256 /* we hold the RTNL here so can safely walk the list */
257 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
258 if (nsdata
!= sdata
&& ieee80211_sdata_running(nsdata
)) {
260 * Allow only a single IBSS interface to be up at any
261 * time. This is restricted because beacon distribution
262 * cannot work properly if both are in the same IBSS.
264 * To remove this restriction we'd have to disallow them
265 * from setting the same SSID on different IBSS interfaces
266 * belonging to the same hardware. Then, however, we're
267 * faced with having to adopt two different TSF timers...
269 if (iftype
== NL80211_IFTYPE_ADHOC
&&
270 nsdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
273 * will not add another interface while any channel
276 if (nsdata
->vif
.csa_active
)
280 * The remaining checks are only performed for interfaces
281 * with the same MAC address.
283 if (!ether_addr_equal(sdata
->vif
.addr
,
288 * check whether it may have the same address
290 if (!identical_mac_addr_allowed(iftype
,
295 * can only add VLANs to enabled APs
297 if (iftype
== NL80211_IFTYPE_AP_VLAN
&&
298 nsdata
->vif
.type
== NL80211_IFTYPE_AP
)
299 sdata
->bss
= &nsdata
->u
.ap
;
306 static int ieee80211_check_queues(struct ieee80211_sub_if_data
*sdata
,
307 enum nl80211_iftype iftype
)
309 int n_queues
= sdata
->local
->hw
.queues
;
312 if (iftype
!= NL80211_IFTYPE_P2P_DEVICE
) {
313 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
314 if (WARN_ON_ONCE(sdata
->vif
.hw_queue
[i
] ==
315 IEEE80211_INVAL_HW_QUEUE
))
317 if (WARN_ON_ONCE(sdata
->vif
.hw_queue
[i
] >=
323 if ((iftype
!= NL80211_IFTYPE_AP
&&
324 iftype
!= NL80211_IFTYPE_P2P_GO
&&
325 iftype
!= NL80211_IFTYPE_MESH_POINT
) ||
326 !(sdata
->local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)) {
327 sdata
->vif
.cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
331 if (WARN_ON_ONCE(sdata
->vif
.cab_queue
== IEEE80211_INVAL_HW_QUEUE
))
334 if (WARN_ON_ONCE(sdata
->vif
.cab_queue
>= n_queues
))
340 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data
*sdata
,
343 struct ieee80211_local
*local
= sdata
->local
;
344 u32 flags
= sdata
->u
.mntr_flags
;
346 #define ADJUST(_f, _s) do { \
347 if (flags & MONITOR_FLAG_##_f) \
348 local->fif_##_s += offset; \
351 ADJUST(FCSFAIL
, fcsfail
);
352 ADJUST(PLCPFAIL
, plcpfail
);
353 ADJUST(CONTROL
, control
);
354 ADJUST(CONTROL
, pspoll
);
355 ADJUST(OTHER_BSS
, other_bss
);
360 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data
*sdata
)
362 struct ieee80211_local
*local
= sdata
->local
;
365 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
366 if (local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)
367 sdata
->vif
.hw_queue
[i
] = IEEE80211_INVAL_HW_QUEUE
;
368 else if (local
->hw
.queues
>= IEEE80211_NUM_ACS
)
369 sdata
->vif
.hw_queue
[i
] = i
;
371 sdata
->vif
.hw_queue
[i
] = 0;
373 sdata
->vif
.cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
376 int ieee80211_add_virtual_monitor(struct ieee80211_local
*local
)
378 struct ieee80211_sub_if_data
*sdata
;
381 if (!(local
->hw
.flags
& IEEE80211_HW_WANT_MONITOR_VIF
))
386 if (local
->monitor_sdata
)
389 sdata
= kzalloc(sizeof(*sdata
) + local
->hw
.vif_data_size
, GFP_KERNEL
);
394 sdata
->local
= local
;
395 sdata
->vif
.type
= NL80211_IFTYPE_MONITOR
;
396 snprintf(sdata
->name
, IFNAMSIZ
, "%s-monitor",
397 wiphy_name(local
->hw
.wiphy
));
399 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
401 ieee80211_set_default_queues(sdata
);
403 ret
= drv_add_interface(local
, sdata
);
405 /* ok .. stupid driver, it asked for this! */
410 ret
= ieee80211_check_queues(sdata
, NL80211_IFTYPE_MONITOR
);
416 mutex_lock(&local
->iflist_mtx
);
417 rcu_assign_pointer(local
->monitor_sdata
, sdata
);
418 mutex_unlock(&local
->iflist_mtx
);
420 mutex_lock(&local
->mtx
);
421 ret
= ieee80211_vif_use_channel(sdata
, &local
->monitor_chandef
,
422 IEEE80211_CHANCTX_EXCLUSIVE
);
423 mutex_unlock(&local
->mtx
);
425 mutex_lock(&local
->iflist_mtx
);
426 rcu_assign_pointer(local
->monitor_sdata
, NULL
);
427 mutex_unlock(&local
->iflist_mtx
);
429 drv_remove_interface(local
, sdata
);
437 void ieee80211_del_virtual_monitor(struct ieee80211_local
*local
)
439 struct ieee80211_sub_if_data
*sdata
;
441 if (!(local
->hw
.flags
& IEEE80211_HW_WANT_MONITOR_VIF
))
446 mutex_lock(&local
->iflist_mtx
);
448 sdata
= rcu_dereference_protected(local
->monitor_sdata
,
449 lockdep_is_held(&local
->iflist_mtx
));
451 mutex_unlock(&local
->iflist_mtx
);
455 rcu_assign_pointer(local
->monitor_sdata
, NULL
);
456 mutex_unlock(&local
->iflist_mtx
);
460 mutex_lock(&local
->mtx
);
461 ieee80211_vif_release_channel(sdata
);
462 mutex_unlock(&local
->mtx
);
464 drv_remove_interface(local
, sdata
);
470 * NOTE: Be very careful when changing this function, it must NOT return
471 * an error on interface type changes that have been pre-checked, so most
472 * checks should be in ieee80211_check_concurrent_iface.
474 int ieee80211_do_open(struct wireless_dev
*wdev
, bool coming_up
)
476 struct ieee80211_sub_if_data
*sdata
= IEEE80211_WDEV_TO_SUB_IF(wdev
);
477 struct net_device
*dev
= wdev
->netdev
;
478 struct ieee80211_local
*local
= sdata
->local
;
479 struct sta_info
*sta
;
482 u32 hw_reconf_flags
= 0;
484 switch (sdata
->vif
.type
) {
485 case NL80211_IFTYPE_WDS
:
486 if (!is_valid_ether_addr(sdata
->u
.wds
.remote_addr
))
489 case NL80211_IFTYPE_AP_VLAN
: {
490 struct ieee80211_sub_if_data
*master
;
495 list_add(&sdata
->u
.vlan
.list
, &sdata
->bss
->vlans
);
497 master
= container_of(sdata
->bss
,
498 struct ieee80211_sub_if_data
, u
.ap
);
499 sdata
->control_port_protocol
=
500 master
->control_port_protocol
;
501 sdata
->control_port_no_encrypt
=
502 master
->control_port_no_encrypt
;
503 sdata
->vif
.cab_queue
= master
->vif
.cab_queue
;
504 memcpy(sdata
->vif
.hw_queue
, master
->vif
.hw_queue
,
505 sizeof(sdata
->vif
.hw_queue
));
508 case NL80211_IFTYPE_AP
:
509 sdata
->bss
= &sdata
->u
.ap
;
511 case NL80211_IFTYPE_MESH_POINT
:
512 case NL80211_IFTYPE_STATION
:
513 case NL80211_IFTYPE_MONITOR
:
514 case NL80211_IFTYPE_ADHOC
:
515 case NL80211_IFTYPE_P2P_DEVICE
:
516 /* no special treatment */
518 case NL80211_IFTYPE_UNSPECIFIED
:
519 case NUM_NL80211_IFTYPES
:
520 case NL80211_IFTYPE_P2P_CLIENT
:
521 case NL80211_IFTYPE_P2P_GO
:
527 if (local
->open_count
== 0) {
528 res
= drv_start(local
);
531 /* we're brought up, everything changes */
532 hw_reconf_flags
= ~0;
533 ieee80211_led_radio(local
, true);
534 ieee80211_mod_tpt_led_trig(local
,
535 IEEE80211_TPT_LEDTRIG_FL_RADIO
, 0);
539 * Copy the hopefully now-present MAC address to
540 * this interface, if it has the special null one.
542 if (dev
&& is_zero_ether_addr(dev
->dev_addr
)) {
543 memcpy(dev
->dev_addr
,
544 local
->hw
.wiphy
->perm_addr
,
546 memcpy(dev
->perm_addr
, dev
->dev_addr
, ETH_ALEN
);
548 if (!is_valid_ether_addr(dev
->dev_addr
)) {
549 res
= -EADDRNOTAVAIL
;
554 switch (sdata
->vif
.type
) {
555 case NL80211_IFTYPE_AP_VLAN
:
556 /* no need to tell driver, but set carrier and chanctx */
557 if (rtnl_dereference(sdata
->bss
->beacon
)) {
558 ieee80211_vif_vlan_copy_chanctx(sdata
);
559 netif_carrier_on(dev
);
561 netif_carrier_off(dev
);
564 case NL80211_IFTYPE_MONITOR
:
565 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
566 local
->cooked_mntrs
++;
570 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
) {
571 res
= drv_add_interface(local
, sdata
);
574 } else if (local
->monitors
== 0 && local
->open_count
== 0) {
575 res
= ieee80211_add_virtual_monitor(local
);
580 /* must be before the call to ieee80211_configure_filter */
582 if (local
->monitors
== 1) {
583 local
->hw
.conf
.flags
|= IEEE80211_CONF_MONITOR
;
584 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
587 ieee80211_adjust_monitor_flags(sdata
, 1);
588 ieee80211_configure_filter(local
);
589 mutex_lock(&local
->mtx
);
590 ieee80211_recalc_idle(local
);
591 mutex_unlock(&local
->mtx
);
593 netif_carrier_on(dev
);
597 ieee80211_del_virtual_monitor(local
);
599 res
= drv_add_interface(local
, sdata
);
602 res
= ieee80211_check_queues(sdata
,
603 ieee80211_vif_type_p2p(&sdata
->vif
));
605 goto err_del_interface
;
608 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
610 local
->fif_probe_req
++;
612 ieee80211_configure_filter(local
);
613 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
614 local
->fif_probe_req
++;
617 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
)
618 changed
|= ieee80211_reset_erp_info(sdata
);
619 ieee80211_bss_info_change_notify(sdata
, changed
);
621 switch (sdata
->vif
.type
) {
622 case NL80211_IFTYPE_STATION
:
623 case NL80211_IFTYPE_ADHOC
:
624 case NL80211_IFTYPE_AP
:
625 case NL80211_IFTYPE_MESH_POINT
:
626 netif_carrier_off(dev
);
628 case NL80211_IFTYPE_WDS
:
629 case NL80211_IFTYPE_P2P_DEVICE
:
637 * set default queue parameters so drivers don't
638 * need to initialise the hardware if the hardware
639 * doesn't start up with sane defaults
641 ieee80211_set_wmm_default(sdata
, true);
644 set_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
646 if (sdata
->vif
.type
== NL80211_IFTYPE_WDS
) {
647 /* Create STA entry for the WDS peer */
648 sta
= sta_info_alloc(sdata
, sdata
->u
.wds
.remote_addr
,
652 goto err_del_interface
;
655 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTH
);
656 sta_info_pre_move_state(sta
, IEEE80211_STA_ASSOC
);
657 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
659 res
= sta_info_insert(sta
);
661 /* STA has been freed */
662 goto err_del_interface
;
665 rate_control_rate_init(sta
);
666 netif_carrier_on(dev
);
667 } else if (sdata
->vif
.type
== NL80211_IFTYPE_P2P_DEVICE
) {
668 rcu_assign_pointer(local
->p2p_sdata
, sdata
);
672 * set_multicast_list will be invoked by the networking core
673 * which will check whether any increments here were done in
674 * error and sync them down to the hardware as filter flags.
676 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
677 atomic_inc(&local
->iff_allmultis
);
679 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
680 atomic_inc(&local
->iff_promiscs
);
686 ieee80211_hw_config(local
, hw_reconf_flags
);
688 ieee80211_recalc_ps(local
, -1);
690 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
691 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
692 /* XXX: for AP_VLAN, actually track AP queues */
693 netif_tx_start_all_queues(dev
);
696 int n_acs
= IEEE80211_NUM_ACS
;
699 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
702 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
703 if (sdata
->vif
.cab_queue
== IEEE80211_INVAL_HW_QUEUE
||
704 (local
->queue_stop_reasons
[sdata
->vif
.cab_queue
] == 0 &&
705 skb_queue_empty(&local
->pending
[sdata
->vif
.cab_queue
]))) {
706 for (ac
= 0; ac
< n_acs
; ac
++) {
707 int ac_queue
= sdata
->vif
.hw_queue
[ac
];
709 if (local
->queue_stop_reasons
[ac_queue
] == 0 &&
710 skb_queue_empty(&local
->pending
[ac_queue
]))
711 netif_start_subqueue(dev
, ac
);
714 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
719 drv_remove_interface(local
, sdata
);
721 if (!local
->open_count
)
725 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
726 list_del(&sdata
->u
.vlan
.list
);
727 /* might already be clear but that doesn't matter */
728 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
732 static int ieee80211_open(struct net_device
*dev
)
734 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
737 /* fail early if user set an invalid address */
738 if (!is_valid_ether_addr(dev
->dev_addr
))
739 return -EADDRNOTAVAIL
;
741 err
= ieee80211_check_concurrent_iface(sdata
, sdata
->vif
.type
);
745 return ieee80211_do_open(&sdata
->wdev
, true);
748 static void ieee80211_do_stop(struct ieee80211_sub_if_data
*sdata
,
751 struct ieee80211_local
*local
= sdata
->local
;
753 struct sk_buff
*skb
, *tmp
;
754 u32 hw_reconf_flags
= 0;
757 struct cfg80211_chan_def chandef
;
759 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
761 if (rcu_access_pointer(local
->scan_sdata
) == sdata
)
762 ieee80211_scan_cancel(local
);
765 * Stop TX on this interface first.
768 netif_tx_stop_all_queues(sdata
->dev
);
770 ieee80211_roc_purge(local
, sdata
);
772 switch (sdata
->vif
.type
) {
773 case NL80211_IFTYPE_STATION
:
774 ieee80211_mgd_stop(sdata
);
776 case NL80211_IFTYPE_ADHOC
:
777 ieee80211_ibss_stop(sdata
);
779 case NL80211_IFTYPE_AP
:
780 cancel_work_sync(&sdata
->u
.ap
.request_smps_work
);
787 * Remove all stations associated with this interface.
789 * This must be done before calling ops->remove_interface()
790 * because otherwise we can later invoke ops->sta_notify()
791 * whenever the STAs are removed, and that invalidates driver
792 * assumptions about always getting a vif pointer that is valid
793 * (because if we remove a STA after ops->remove_interface()
794 * the driver will have removed the vif info already!)
796 * This is relevant only in WDS mode, in all other modes we've
797 * already removed all stations when disconnecting or similar,
800 flushed
= sta_info_flush(sdata
);
801 WARN_ON_ONCE((sdata
->vif
.type
!= NL80211_IFTYPE_WDS
&& flushed
> 0) ||
802 (sdata
->vif
.type
== NL80211_IFTYPE_WDS
&& flushed
!= 1));
804 /* don't count this interface for promisc/allmulti while it is down */
805 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
806 atomic_dec(&local
->iff_allmultis
);
808 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
809 atomic_dec(&local
->iff_promiscs
);
811 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
813 local
->fif_probe_req
--;
814 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
815 local
->fif_probe_req
--;
819 netif_addr_lock_bh(sdata
->dev
);
820 spin_lock_bh(&local
->filter_lock
);
821 __hw_addr_unsync(&local
->mc_list
, &sdata
->dev
->mc
,
822 sdata
->dev
->addr_len
);
823 spin_unlock_bh(&local
->filter_lock
);
824 netif_addr_unlock_bh(sdata
->dev
);
827 del_timer_sync(&local
->dynamic_ps_timer
);
828 cancel_work_sync(&local
->dynamic_ps_enable_work
);
830 cancel_work_sync(&sdata
->recalc_smps
);
832 sdata
->vif
.csa_active
= false;
834 cancel_work_sync(&sdata
->csa_finalize_work
);
836 cancel_delayed_work_sync(&sdata
->dfs_cac_timer_work
);
838 if (sdata
->wdev
.cac_started
) {
839 chandef
= sdata
->vif
.bss_conf
.chandef
;
840 WARN_ON(local
->suspended
);
841 mutex_lock(&local
->mtx
);
842 ieee80211_vif_release_channel(sdata
);
843 mutex_unlock(&local
->mtx
);
844 cfg80211_cac_event(sdata
->dev
, &chandef
,
845 NL80211_RADAR_CAC_ABORTED
,
849 /* APs need special treatment */
850 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
851 struct ieee80211_sub_if_data
*vlan
, *tmpsdata
;
853 /* down all dependent devices, that is VLANs */
854 list_for_each_entry_safe(vlan
, tmpsdata
, &sdata
->u
.ap
.vlans
,
856 dev_close(vlan
->dev
);
857 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
858 } else if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
859 /* remove all packets in parent bc_buf pointing to this dev */
860 ps
= &sdata
->bss
->ps
;
862 spin_lock_irqsave(&ps
->bc_buf
.lock
, flags
);
863 skb_queue_walk_safe(&ps
->bc_buf
, skb
, tmp
) {
864 if (skb
->dev
== sdata
->dev
) {
865 __skb_unlink(skb
, &ps
->bc_buf
);
866 local
->total_ps_buffered
--;
867 ieee80211_free_txskb(&local
->hw
, skb
);
870 spin_unlock_irqrestore(&ps
->bc_buf
.lock
, flags
);
876 switch (sdata
->vif
.type
) {
877 case NL80211_IFTYPE_AP_VLAN
:
878 list_del(&sdata
->u
.vlan
.list
);
879 rcu_assign_pointer(sdata
->vif
.chanctx_conf
, NULL
);
880 /* no need to tell driver */
882 case NL80211_IFTYPE_MONITOR
:
883 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
884 local
->cooked_mntrs
--;
889 if (local
->monitors
== 0) {
890 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_MONITOR
;
891 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
894 ieee80211_adjust_monitor_flags(sdata
, -1);
896 case NL80211_IFTYPE_P2P_DEVICE
:
897 /* relies on synchronize_rcu() below */
898 rcu_assign_pointer(local
->p2p_sdata
, NULL
);
901 cancel_work_sync(&sdata
->work
);
903 * When we get here, the interface is marked down.
904 * Free the remaining keys, if there are any
905 * (shouldn't be, except maybe in WDS mode?)
907 * Force the key freeing to always synchronize_net()
908 * to wait for the RX path in case it is using this
909 * interface enqueuing frames * at this very time on
912 ieee80211_free_keys(sdata
, true);
915 case NL80211_IFTYPE_AP
:
916 skb_queue_purge(&sdata
->skb_queue
);
921 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
922 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
923 skb_queue_walk_safe(&local
->pending
[i
], skb
, tmp
) {
924 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
925 if (info
->control
.vif
== &sdata
->vif
) {
926 __skb_unlink(skb
, &local
->pending
[i
]);
927 ieee80211_free_txskb(&local
->hw
, skb
);
931 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
933 if (local
->open_count
== 0)
934 ieee80211_clear_tx_pending(local
);
937 * If the interface goes down while suspended, presumably because
938 * the device was unplugged and that happens before our resume,
939 * then the driver is already unconfigured and the remainder of
940 * this function isn't needed.
941 * XXX: what about WoWLAN? If the device has software state, e.g.
942 * memory allocated, it might expect teardown commands from
945 if (local
->suspended
) {
946 WARN_ON(local
->wowlan
);
947 WARN_ON(rtnl_dereference(local
->monitor_sdata
));
951 switch (sdata
->vif
.type
) {
952 case NL80211_IFTYPE_AP_VLAN
:
954 case NL80211_IFTYPE_MONITOR
:
955 if (local
->monitors
== 0)
956 ieee80211_del_virtual_monitor(local
);
958 mutex_lock(&local
->mtx
);
959 ieee80211_recalc_idle(local
);
960 mutex_unlock(&local
->mtx
);
962 if (!(sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
))
968 drv_remove_interface(local
, sdata
);
971 ieee80211_recalc_ps(local
, -1);
973 if (local
->open_count
== 0) {
974 ieee80211_stop_device(local
);
976 /* no reconfiguring after stop! */
980 /* do after stop to avoid reconfiguring when we stop anyway */
981 ieee80211_configure_filter(local
);
982 ieee80211_hw_config(local
, hw_reconf_flags
);
984 if (local
->monitors
== local
->open_count
)
985 ieee80211_add_virtual_monitor(local
);
988 static int ieee80211_stop(struct net_device
*dev
)
990 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
992 ieee80211_do_stop(sdata
, true);
997 static void ieee80211_set_multicast_list(struct net_device
*dev
)
999 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1000 struct ieee80211_local
*local
= sdata
->local
;
1001 int allmulti
, promisc
, sdata_allmulti
, sdata_promisc
;
1003 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
1004 promisc
= !!(dev
->flags
& IFF_PROMISC
);
1005 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
1006 sdata_promisc
= !!(sdata
->flags
& IEEE80211_SDATA_PROMISC
);
1008 if (allmulti
!= sdata_allmulti
) {
1009 if (dev
->flags
& IFF_ALLMULTI
)
1010 atomic_inc(&local
->iff_allmultis
);
1012 atomic_dec(&local
->iff_allmultis
);
1013 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
1016 if (promisc
!= sdata_promisc
) {
1017 if (dev
->flags
& IFF_PROMISC
)
1018 atomic_inc(&local
->iff_promiscs
);
1020 atomic_dec(&local
->iff_promiscs
);
1021 sdata
->flags
^= IEEE80211_SDATA_PROMISC
;
1023 spin_lock_bh(&local
->filter_lock
);
1024 __hw_addr_sync(&local
->mc_list
, &dev
->mc
, dev
->addr_len
);
1025 spin_unlock_bh(&local
->filter_lock
);
1026 ieee80211_queue_work(&local
->hw
, &local
->reconfig_filter
);
1030 * Called when the netdev is removed or, by the code below, before
1031 * the interface type changes.
1033 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data
*sdata
)
1037 /* free extra data */
1038 ieee80211_free_keys(sdata
, false);
1040 ieee80211_debugfs_remove_netdev(sdata
);
1042 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
1043 __skb_queue_purge(&sdata
->fragments
[i
].skb_list
);
1044 sdata
->fragment_next
= 0;
1046 if (ieee80211_vif_is_mesh(&sdata
->vif
))
1047 mesh_rmc_free(sdata
);
1050 static void ieee80211_uninit(struct net_device
*dev
)
1052 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev
));
1055 static u16
ieee80211_netdev_select_queue(struct net_device
*dev
,
1056 struct sk_buff
*skb
,
1058 select_queue_fallback_t fallback
)
1060 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev
), skb
);
1063 static const struct net_device_ops ieee80211_dataif_ops
= {
1064 .ndo_open
= ieee80211_open
,
1065 .ndo_stop
= ieee80211_stop
,
1066 .ndo_uninit
= ieee80211_uninit
,
1067 .ndo_start_xmit
= ieee80211_subif_start_xmit
,
1068 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
1069 .ndo_change_mtu
= ieee80211_change_mtu
,
1070 .ndo_set_mac_address
= ieee80211_change_mac
,
1071 .ndo_select_queue
= ieee80211_netdev_select_queue
,
1074 static u16
ieee80211_monitor_select_queue(struct net_device
*dev
,
1075 struct sk_buff
*skb
,
1077 select_queue_fallback_t fallback
)
1079 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1080 struct ieee80211_local
*local
= sdata
->local
;
1081 struct ieee80211_hdr
*hdr
;
1082 struct ieee80211_radiotap_header
*rtap
= (void *)skb
->data
;
1084 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1088 skb
->len
< le16_to_cpu(rtap
->it_len
) + 2 /* frame control */)
1089 return 0; /* doesn't matter, frame will be dropped */
1091 hdr
= (void *)((u8
*)skb
->data
+ le16_to_cpu(rtap
->it_len
));
1093 return ieee80211_select_queue_80211(sdata
, skb
, hdr
);
1096 static const struct net_device_ops ieee80211_monitorif_ops
= {
1097 .ndo_open
= ieee80211_open
,
1098 .ndo_stop
= ieee80211_stop
,
1099 .ndo_uninit
= ieee80211_uninit
,
1100 .ndo_start_xmit
= ieee80211_monitor_start_xmit
,
1101 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
1102 .ndo_change_mtu
= ieee80211_change_mtu
,
1103 .ndo_set_mac_address
= ieee80211_change_mac
,
1104 .ndo_select_queue
= ieee80211_monitor_select_queue
,
1107 static void ieee80211_if_setup(struct net_device
*dev
)
1110 dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1111 dev
->netdev_ops
= &ieee80211_dataif_ops
;
1112 dev
->destructor
= free_netdev
;
1115 static void ieee80211_iface_work(struct work_struct
*work
)
1117 struct ieee80211_sub_if_data
*sdata
=
1118 container_of(work
, struct ieee80211_sub_if_data
, work
);
1119 struct ieee80211_local
*local
= sdata
->local
;
1120 struct sk_buff
*skb
;
1121 struct sta_info
*sta
;
1122 struct ieee80211_ra_tid
*ra_tid
;
1124 if (!ieee80211_sdata_running(sdata
))
1127 if (local
->scanning
)
1131 * ieee80211_queue_work() should have picked up most cases,
1132 * here we'll pick the rest.
1134 if (WARN(local
->suspended
,
1135 "interface work scheduled while going to suspend\n"))
1138 /* first process frames */
1139 while ((skb
= skb_dequeue(&sdata
->skb_queue
))) {
1140 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
1142 if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_START
) {
1143 ra_tid
= (void *)&skb
->cb
;
1144 ieee80211_start_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
1146 } else if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_STOP
) {
1147 ra_tid
= (void *)&skb
->cb
;
1148 ieee80211_stop_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
1150 } else if (ieee80211_is_action(mgmt
->frame_control
) &&
1151 mgmt
->u
.action
.category
== WLAN_CATEGORY_BACK
) {
1154 mutex_lock(&local
->sta_mtx
);
1155 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
1157 switch (mgmt
->u
.action
.u
.addba_req
.action_code
) {
1158 case WLAN_ACTION_ADDBA_REQ
:
1159 ieee80211_process_addba_request(
1160 local
, sta
, mgmt
, len
);
1162 case WLAN_ACTION_ADDBA_RESP
:
1163 ieee80211_process_addba_resp(local
, sta
,
1166 case WLAN_ACTION_DELBA
:
1167 ieee80211_process_delba(sdata
, sta
,
1175 mutex_unlock(&local
->sta_mtx
);
1176 } else if (ieee80211_is_data_qos(mgmt
->frame_control
)) {
1177 struct ieee80211_hdr
*hdr
= (void *)mgmt
;
1179 * So the frame isn't mgmt, but frame_control
1180 * is at the right place anyway, of course, so
1181 * the if statement is correct.
1183 * Warn if we have other data frame types here,
1184 * they must not get here.
1186 WARN_ON(hdr
->frame_control
&
1187 cpu_to_le16(IEEE80211_STYPE_NULLFUNC
));
1188 WARN_ON(!(hdr
->seq_ctrl
&
1189 cpu_to_le16(IEEE80211_SCTL_FRAG
)));
1191 * This was a fragment of a frame, received while
1192 * a block-ack session was active. That cannot be
1193 * right, so terminate the session.
1195 mutex_lock(&local
->sta_mtx
);
1196 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
1198 u16 tid
= *ieee80211_get_qos_ctl(hdr
) &
1199 IEEE80211_QOS_CTL_TID_MASK
;
1201 __ieee80211_stop_rx_ba_session(
1202 sta
, tid
, WLAN_BACK_RECIPIENT
,
1203 WLAN_REASON_QSTA_REQUIRE_SETUP
,
1206 mutex_unlock(&local
->sta_mtx
);
1207 } else switch (sdata
->vif
.type
) {
1208 case NL80211_IFTYPE_STATION
:
1209 ieee80211_sta_rx_queued_mgmt(sdata
, skb
);
1211 case NL80211_IFTYPE_ADHOC
:
1212 ieee80211_ibss_rx_queued_mgmt(sdata
, skb
);
1214 case NL80211_IFTYPE_MESH_POINT
:
1215 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
1217 ieee80211_mesh_rx_queued_mgmt(sdata
, skb
);
1220 WARN(1, "frame for unexpected interface type");
1227 /* then other type-dependent work */
1228 switch (sdata
->vif
.type
) {
1229 case NL80211_IFTYPE_STATION
:
1230 ieee80211_sta_work(sdata
);
1232 case NL80211_IFTYPE_ADHOC
:
1233 ieee80211_ibss_work(sdata
);
1235 case NL80211_IFTYPE_MESH_POINT
:
1236 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
1238 ieee80211_mesh_work(sdata
);
1245 static void ieee80211_recalc_smps_work(struct work_struct
*work
)
1247 struct ieee80211_sub_if_data
*sdata
=
1248 container_of(work
, struct ieee80211_sub_if_data
, recalc_smps
);
1250 ieee80211_recalc_smps(sdata
);
1254 * Helper function to initialise an interface to a specific type.
1256 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data
*sdata
,
1257 enum nl80211_iftype type
)
1259 /* clear type-dependent union */
1260 memset(&sdata
->u
, 0, sizeof(sdata
->u
));
1262 /* and set some type-dependent values */
1263 sdata
->vif
.type
= type
;
1264 sdata
->vif
.p2p
= false;
1265 sdata
->wdev
.iftype
= type
;
1267 sdata
->control_port_protocol
= cpu_to_be16(ETH_P_PAE
);
1268 sdata
->control_port_no_encrypt
= false;
1269 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
1271 sdata
->noack_map
= 0;
1273 /* only monitor/p2p-device differ */
1275 sdata
->dev
->netdev_ops
= &ieee80211_dataif_ops
;
1276 sdata
->dev
->type
= ARPHRD_ETHER
;
1279 skb_queue_head_init(&sdata
->skb_queue
);
1280 INIT_WORK(&sdata
->work
, ieee80211_iface_work
);
1281 INIT_WORK(&sdata
->recalc_smps
, ieee80211_recalc_smps_work
);
1282 INIT_WORK(&sdata
->csa_finalize_work
, ieee80211_csa_finalize_work
);
1285 case NL80211_IFTYPE_P2P_GO
:
1286 type
= NL80211_IFTYPE_AP
;
1287 sdata
->vif
.type
= type
;
1288 sdata
->vif
.p2p
= true;
1290 case NL80211_IFTYPE_AP
:
1291 skb_queue_head_init(&sdata
->u
.ap
.ps
.bc_buf
);
1292 INIT_LIST_HEAD(&sdata
->u
.ap
.vlans
);
1293 INIT_WORK(&sdata
->u
.ap
.request_smps_work
,
1294 ieee80211_request_smps_ap_work
);
1295 sdata
->vif
.bss_conf
.bssid
= sdata
->vif
.addr
;
1296 sdata
->u
.ap
.req_smps
= IEEE80211_SMPS_OFF
;
1298 case NL80211_IFTYPE_P2P_CLIENT
:
1299 type
= NL80211_IFTYPE_STATION
;
1300 sdata
->vif
.type
= type
;
1301 sdata
->vif
.p2p
= true;
1303 case NL80211_IFTYPE_STATION
:
1304 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.mgd
.bssid
;
1305 ieee80211_sta_setup_sdata(sdata
);
1307 case NL80211_IFTYPE_ADHOC
:
1308 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.ibss
.bssid
;
1309 ieee80211_ibss_setup_sdata(sdata
);
1311 case NL80211_IFTYPE_MESH_POINT
:
1312 if (ieee80211_vif_is_mesh(&sdata
->vif
))
1313 ieee80211_mesh_init_sdata(sdata
);
1315 case NL80211_IFTYPE_MONITOR
:
1316 sdata
->dev
->type
= ARPHRD_IEEE80211_RADIOTAP
;
1317 sdata
->dev
->netdev_ops
= &ieee80211_monitorif_ops
;
1318 sdata
->u
.mntr_flags
= MONITOR_FLAG_CONTROL
|
1319 MONITOR_FLAG_OTHER_BSS
;
1321 case NL80211_IFTYPE_WDS
:
1322 sdata
->vif
.bss_conf
.bssid
= NULL
;
1324 case NL80211_IFTYPE_AP_VLAN
:
1325 case NL80211_IFTYPE_P2P_DEVICE
:
1326 sdata
->vif
.bss_conf
.bssid
= sdata
->vif
.addr
;
1328 case NL80211_IFTYPE_UNSPECIFIED
:
1329 case NUM_NL80211_IFTYPES
:
1334 ieee80211_debugfs_add_netdev(sdata
);
1337 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data
*sdata
,
1338 enum nl80211_iftype type
)
1340 struct ieee80211_local
*local
= sdata
->local
;
1342 enum nl80211_iftype internal_type
= type
;
1347 if (!local
->ops
->change_interface
)
1350 switch (sdata
->vif
.type
) {
1351 case NL80211_IFTYPE_AP
:
1352 case NL80211_IFTYPE_STATION
:
1353 case NL80211_IFTYPE_ADHOC
:
1355 * Could maybe also all others here?
1356 * Just not sure how that interacts
1357 * with the RX/config path e.g. for
1366 case NL80211_IFTYPE_AP
:
1367 case NL80211_IFTYPE_STATION
:
1368 case NL80211_IFTYPE_ADHOC
:
1370 * Could probably support everything
1371 * but WDS here (WDS do_open can fail
1372 * under memory pressure, which this
1373 * code isn't prepared to handle).
1376 case NL80211_IFTYPE_P2P_CLIENT
:
1378 internal_type
= NL80211_IFTYPE_STATION
;
1380 case NL80211_IFTYPE_P2P_GO
:
1382 internal_type
= NL80211_IFTYPE_AP
;
1388 ret
= ieee80211_check_concurrent_iface(sdata
, internal_type
);
1392 ieee80211_do_stop(sdata
, false);
1394 ieee80211_teardown_sdata(sdata
);
1396 ret
= drv_change_interface(local
, sdata
, internal_type
, p2p
);
1398 type
= ieee80211_vif_type_p2p(&sdata
->vif
);
1401 * Ignore return value here, there's not much we can do since
1402 * the driver changed the interface type internally already.
1403 * The warnings will hopefully make driver authors fix it :-)
1405 ieee80211_check_queues(sdata
, type
);
1407 ieee80211_setup_sdata(sdata
, type
);
1409 err
= ieee80211_do_open(&sdata
->wdev
, false);
1410 WARN(err
, "type change: do_open returned %d", err
);
1415 int ieee80211_if_change_type(struct ieee80211_sub_if_data
*sdata
,
1416 enum nl80211_iftype type
)
1422 if (type
== ieee80211_vif_type_p2p(&sdata
->vif
))
1425 if (ieee80211_sdata_running(sdata
)) {
1426 ret
= ieee80211_runtime_change_iftype(sdata
, type
);
1430 /* Purge and reset type-dependent state. */
1431 ieee80211_teardown_sdata(sdata
);
1432 ieee80211_setup_sdata(sdata
, type
);
1435 /* reset some values that shouldn't be kept across type changes */
1436 sdata
->drop_unencrypted
= 0;
1437 if (type
== NL80211_IFTYPE_STATION
)
1438 sdata
->u
.mgd
.use_4addr
= false;
1443 static void ieee80211_assign_perm_addr(struct ieee80211_local
*local
,
1444 u8
*perm_addr
, enum nl80211_iftype type
)
1446 struct ieee80211_sub_if_data
*sdata
;
1447 u64 mask
, start
, addr
, val
, inc
;
1449 u8 tmp_addr
[ETH_ALEN
];
1452 /* default ... something at least */
1453 memcpy(perm_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
1455 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
) &&
1456 local
->hw
.wiphy
->n_addresses
<= 1)
1459 mutex_lock(&local
->iflist_mtx
);
1462 case NL80211_IFTYPE_MONITOR
:
1463 /* doesn't matter */
1465 case NL80211_IFTYPE_WDS
:
1466 case NL80211_IFTYPE_AP_VLAN
:
1467 /* match up with an AP interface */
1468 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1469 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
1471 memcpy(perm_addr
, sdata
->vif
.addr
, ETH_ALEN
);
1474 /* keep default if no AP interface present */
1476 case NL80211_IFTYPE_P2P_CLIENT
:
1477 case NL80211_IFTYPE_P2P_GO
:
1478 if (local
->hw
.flags
& IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF
) {
1479 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1480 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
)
1482 if (!ieee80211_sdata_running(sdata
))
1484 memcpy(perm_addr
, sdata
->vif
.addr
, ETH_ALEN
);
1488 /* otherwise fall through */
1490 /* assign a new address if possible -- try n_addresses first */
1491 for (i
= 0; i
< local
->hw
.wiphy
->n_addresses
; i
++) {
1494 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1495 if (ether_addr_equal(local
->hw
.wiphy
->addresses
[i
].addr
,
1504 local
->hw
.wiphy
->addresses
[i
].addr
,
1510 /* try mask if available */
1511 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
))
1514 m
= local
->hw
.wiphy
->addr_mask
;
1515 mask
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1516 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1517 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1519 if (__ffs64(mask
) + hweight64(mask
) != fls64(mask
)) {
1520 /* not a contiguous mask ... not handled now! */
1521 pr_info("not contiguous\n");
1526 * Pick address of existing interface in case user changed
1527 * MAC address manually, default to perm_addr.
1529 m
= local
->hw
.wiphy
->perm_addr
;
1530 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1531 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
)
1533 m
= sdata
->vif
.addr
;
1536 start
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1537 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1538 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1540 inc
= 1ULL<<__ffs64(mask
);
1541 val
= (start
& mask
);
1542 addr
= (start
& ~mask
) | (val
& mask
);
1546 tmp_addr
[5] = addr
>> 0*8;
1547 tmp_addr
[4] = addr
>> 1*8;
1548 tmp_addr
[3] = addr
>> 2*8;
1549 tmp_addr
[2] = addr
>> 3*8;
1550 tmp_addr
[1] = addr
>> 4*8;
1551 tmp_addr
[0] = addr
>> 5*8;
1555 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1556 if (ether_addr_equal(tmp_addr
, sdata
->vif
.addr
)) {
1563 memcpy(perm_addr
, tmp_addr
, ETH_ALEN
);
1566 addr
= (start
& ~mask
) | (val
& mask
);
1567 } while (addr
!= start
);
1573 mutex_unlock(&local
->iflist_mtx
);
1576 int ieee80211_if_add(struct ieee80211_local
*local
, const char *name
,
1577 struct wireless_dev
**new_wdev
, enum nl80211_iftype type
,
1578 struct vif_params
*params
)
1580 struct net_device
*ndev
= NULL
;
1581 struct ieee80211_sub_if_data
*sdata
= NULL
;
1587 if (type
== NL80211_IFTYPE_P2P_DEVICE
) {
1588 struct wireless_dev
*wdev
;
1590 sdata
= kzalloc(sizeof(*sdata
) + local
->hw
.vif_data_size
,
1594 wdev
= &sdata
->wdev
;
1597 strlcpy(sdata
->name
, name
, IFNAMSIZ
);
1598 ieee80211_assign_perm_addr(local
, wdev
->address
, type
);
1599 memcpy(sdata
->vif
.addr
, wdev
->address
, ETH_ALEN
);
1601 if (local
->hw
.queues
>= IEEE80211_NUM_ACS
)
1602 txqs
= IEEE80211_NUM_ACS
;
1604 ndev
= alloc_netdev_mqs(sizeof(*sdata
) +
1605 local
->hw
.vif_data_size
,
1606 name
, ieee80211_if_setup
, txqs
, 1);
1609 dev_net_set(ndev
, wiphy_net(local
->hw
.wiphy
));
1611 ndev
->needed_headroom
= local
->tx_headroom
+
1612 4*6 /* four MAC addresses */
1613 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1615 + 8 /* rfc1042/bridge tunnel */
1616 - ETH_HLEN
/* ethernet hard_header_len */
1617 + IEEE80211_ENCRYPT_HEADROOM
;
1618 ndev
->needed_tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
1620 ret
= dev_alloc_name(ndev
, ndev
->name
);
1626 ieee80211_assign_perm_addr(local
, ndev
->perm_addr
, type
);
1627 memcpy(ndev
->dev_addr
, ndev
->perm_addr
, ETH_ALEN
);
1628 SET_NETDEV_DEV(ndev
, wiphy_dev(local
->hw
.wiphy
));
1630 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1631 sdata
= netdev_priv(ndev
);
1632 ndev
->ieee80211_ptr
= &sdata
->wdev
;
1633 memcpy(sdata
->vif
.addr
, ndev
->dev_addr
, ETH_ALEN
);
1634 memcpy(sdata
->name
, ndev
->name
, IFNAMSIZ
);
1639 /* initialise type-independent data */
1640 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
1641 sdata
->local
= local
;
1643 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
1644 skb_queue_head_init(&sdata
->fragments
[i
].skb_list
);
1646 INIT_LIST_HEAD(&sdata
->key_list
);
1648 INIT_DELAYED_WORK(&sdata
->dfs_cac_timer_work
,
1649 ieee80211_dfs_cac_timer_work
);
1650 INIT_DELAYED_WORK(&sdata
->dec_tailroom_needed_wk
,
1651 ieee80211_delayed_tailroom_dec
);
1653 for (i
= 0; i
< IEEE80211_NUM_BANDS
; i
++) {
1654 struct ieee80211_supported_band
*sband
;
1655 sband
= local
->hw
.wiphy
->bands
[i
];
1656 sdata
->rc_rateidx_mask
[i
] =
1657 sband
? (1 << sband
->n_bitrates
) - 1 : 0;
1659 memcpy(sdata
->rc_rateidx_mcs_mask
[i
],
1660 sband
->ht_cap
.mcs
.rx_mask
,
1661 sizeof(sdata
->rc_rateidx_mcs_mask
[i
]));
1663 memset(sdata
->rc_rateidx_mcs_mask
[i
], 0,
1664 sizeof(sdata
->rc_rateidx_mcs_mask
[i
]));
1667 ieee80211_set_default_queues(sdata
);
1669 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
1670 sdata
->user_power_level
= local
->user_power_level
;
1672 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
1674 /* setup type-dependent data */
1675 ieee80211_setup_sdata(sdata
, type
);
1679 ndev
->ieee80211_ptr
->use_4addr
= params
->use_4addr
;
1680 if (type
== NL80211_IFTYPE_STATION
)
1681 sdata
->u
.mgd
.use_4addr
= params
->use_4addr
;
1684 ndev
->features
|= local
->hw
.netdev_features
;
1686 ret
= register_netdevice(ndev
);
1693 mutex_lock(&local
->iflist_mtx
);
1694 list_add_tail_rcu(&sdata
->list
, &local
->interfaces
);
1695 mutex_unlock(&local
->iflist_mtx
);
1698 *new_wdev
= &sdata
->wdev
;
1703 void ieee80211_if_remove(struct ieee80211_sub_if_data
*sdata
)
1707 mutex_lock(&sdata
->local
->iflist_mtx
);
1708 list_del_rcu(&sdata
->list
);
1709 mutex_unlock(&sdata
->local
->iflist_mtx
);
1714 unregister_netdevice(sdata
->dev
);
1716 cfg80211_unregister_wdev(&sdata
->wdev
);
1721 void ieee80211_sdata_stop(struct ieee80211_sub_if_data
*sdata
)
1723 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING
, &sdata
->state
)))
1725 ieee80211_do_stop(sdata
, true);
1726 ieee80211_teardown_sdata(sdata
);
1730 * Remove all interfaces, may only be called at hardware unregistration
1731 * time because it doesn't do RCU-safe list removals.
1733 void ieee80211_remove_interfaces(struct ieee80211_local
*local
)
1735 struct ieee80211_sub_if_data
*sdata
, *tmp
;
1736 LIST_HEAD(unreg_list
);
1737 LIST_HEAD(wdev_list
);
1742 * Close all AP_VLAN interfaces first, as otherwise they
1743 * might be closed while the AP interface they belong to
1744 * is closed, causing unregister_netdevice_many() to crash.
1746 list_for_each_entry(sdata
, &local
->interfaces
, list
)
1747 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
1748 dev_close(sdata
->dev
);
1750 mutex_lock(&local
->iflist_mtx
);
1751 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
1752 list_del(&sdata
->list
);
1755 unregister_netdevice_queue(sdata
->dev
, &unreg_list
);
1757 list_add(&sdata
->list
, &wdev_list
);
1759 mutex_unlock(&local
->iflist_mtx
);
1760 unregister_netdevice_many(&unreg_list
);
1761 list_del(&unreg_list
);
1763 list_for_each_entry_safe(sdata
, tmp
, &wdev_list
, list
) {
1764 list_del(&sdata
->list
);
1765 cfg80211_unregister_wdev(&sdata
->wdev
);
1770 static int netdev_notify(struct notifier_block
*nb
,
1771 unsigned long state
, void *ptr
)
1773 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
1774 struct ieee80211_sub_if_data
*sdata
;
1776 if (state
!= NETDEV_CHANGENAME
)
1779 if (!dev
->ieee80211_ptr
|| !dev
->ieee80211_ptr
->wiphy
)
1782 if (dev
->ieee80211_ptr
->wiphy
->privid
!= mac80211_wiphy_privid
)
1785 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1787 memcpy(sdata
->name
, dev
->name
, IFNAMSIZ
);
1789 ieee80211_debugfs_rename_netdev(sdata
);
1793 static struct notifier_block mac80211_netdev_notifier
= {
1794 .notifier_call
= netdev_notify
,
1797 int ieee80211_iface_init(void)
1799 return register_netdevice_notifier(&mac80211_netdev_notifier
);
1802 void ieee80211_iface_exit(void)
1804 unregister_netdevice_notifier(&mac80211_netdev_notifier
);