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
= false, scanning
, active
;
105 unsigned int led_trig_start
= 0, led_trig_stop
= 0;
106 struct ieee80211_roc_work
*roc
;
108 lockdep_assert_held(&local
->mtx
);
110 active
= force_active
||
111 !list_empty(&local
->chanctx_list
) ||
114 if (!local
->ops
->remain_on_channel
) {
115 list_for_each_entry(roc
, &local
->roc_list
, 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_change_mtu(struct net_device
*dev
, int new_mtu
)
155 if (new_mtu
< 256 || new_mtu
> IEEE80211_MAX_DATA_LEN
)
162 static int ieee80211_verify_mac(struct ieee80211_sub_if_data
*sdata
, u8
*addr
,
165 struct ieee80211_local
*local
= sdata
->local
;
166 struct ieee80211_sub_if_data
*iter
;
171 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
))
175 new = ((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);
179 m
= local
->hw
.wiphy
->addr_mask
;
180 mask
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
181 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
182 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
187 mutex_lock(&local
->iflist_mtx
);
188 list_for_each_entry(iter
, &local
->interfaces
, list
) {
192 if (iter
->vif
.type
== NL80211_IFTYPE_MONITOR
&&
193 !(iter
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
))
197 tmp
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
198 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
199 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
201 if ((new & ~mask
) != (tmp
& ~mask
)) {
206 mutex_unlock(&local
->iflist_mtx
);
211 static int ieee80211_change_mac(struct net_device
*dev
, void *addr
)
213 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
214 struct sockaddr
*sa
= addr
;
215 bool check_dup
= true;
218 if (ieee80211_sdata_running(sdata
))
221 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
&&
222 !(sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
))
225 ret
= ieee80211_verify_mac(sdata
, sa
->sa_data
, check_dup
);
229 ret
= eth_mac_addr(dev
, sa
);
232 memcpy(sdata
->vif
.addr
, sa
->sa_data
, ETH_ALEN
);
237 static inline int identical_mac_addr_allowed(int type1
, int type2
)
239 return type1
== NL80211_IFTYPE_MONITOR
||
240 type2
== NL80211_IFTYPE_MONITOR
||
241 type1
== NL80211_IFTYPE_P2P_DEVICE
||
242 type2
== NL80211_IFTYPE_P2P_DEVICE
||
243 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_WDS
) ||
244 (type1
== NL80211_IFTYPE_WDS
&&
245 (type2
== NL80211_IFTYPE_WDS
||
246 type2
== NL80211_IFTYPE_AP
)) ||
247 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_AP_VLAN
) ||
248 (type1
== NL80211_IFTYPE_AP_VLAN
&&
249 (type2
== NL80211_IFTYPE_AP
||
250 type2
== NL80211_IFTYPE_AP_VLAN
));
253 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data
*sdata
,
254 enum nl80211_iftype iftype
)
256 struct ieee80211_local
*local
= sdata
->local
;
257 struct ieee80211_sub_if_data
*nsdata
;
261 /* we hold the RTNL here so can safely walk the list */
262 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
263 if (nsdata
!= sdata
&& ieee80211_sdata_running(nsdata
)) {
265 * Allow only a single IBSS interface to be up at any
266 * time. This is restricted because beacon distribution
267 * cannot work properly if both are in the same IBSS.
269 * To remove this restriction we'd have to disallow them
270 * from setting the same SSID on different IBSS interfaces
271 * belonging to the same hardware. Then, however, we're
272 * faced with having to adopt two different TSF timers...
274 if (iftype
== NL80211_IFTYPE_ADHOC
&&
275 nsdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
278 * will not add another interface while any channel
281 if (nsdata
->vif
.csa_active
)
285 * The remaining checks are only performed for interfaces
286 * with the same MAC address.
288 if (!ether_addr_equal(sdata
->vif
.addr
,
293 * check whether it may have the same address
295 if (!identical_mac_addr_allowed(iftype
,
300 * can only add VLANs to enabled APs
302 if (iftype
== NL80211_IFTYPE_AP_VLAN
&&
303 nsdata
->vif
.type
== NL80211_IFTYPE_AP
)
304 sdata
->bss
= &nsdata
->u
.ap
;
311 static int ieee80211_check_queues(struct ieee80211_sub_if_data
*sdata
,
312 enum nl80211_iftype iftype
)
314 int n_queues
= sdata
->local
->hw
.queues
;
317 if (iftype
!= NL80211_IFTYPE_P2P_DEVICE
) {
318 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
319 if (WARN_ON_ONCE(sdata
->vif
.hw_queue
[i
] ==
320 IEEE80211_INVAL_HW_QUEUE
))
322 if (WARN_ON_ONCE(sdata
->vif
.hw_queue
[i
] >=
328 if ((iftype
!= NL80211_IFTYPE_AP
&&
329 iftype
!= NL80211_IFTYPE_P2P_GO
&&
330 iftype
!= NL80211_IFTYPE_MESH_POINT
) ||
331 !(sdata
->local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)) {
332 sdata
->vif
.cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
336 if (WARN_ON_ONCE(sdata
->vif
.cab_queue
== IEEE80211_INVAL_HW_QUEUE
))
339 if (WARN_ON_ONCE(sdata
->vif
.cab_queue
>= n_queues
))
345 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data
*sdata
,
348 struct ieee80211_local
*local
= sdata
->local
;
349 u32 flags
= sdata
->u
.mntr_flags
;
351 #define ADJUST(_f, _s) do { \
352 if (flags & MONITOR_FLAG_##_f) \
353 local->fif_##_s += offset; \
356 ADJUST(FCSFAIL
, fcsfail
);
357 ADJUST(PLCPFAIL
, plcpfail
);
358 ADJUST(CONTROL
, control
);
359 ADJUST(CONTROL
, pspoll
);
360 ADJUST(OTHER_BSS
, other_bss
);
365 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data
*sdata
)
367 struct ieee80211_local
*local
= sdata
->local
;
370 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
371 if (local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)
372 sdata
->vif
.hw_queue
[i
] = IEEE80211_INVAL_HW_QUEUE
;
373 else if (local
->hw
.queues
>= IEEE80211_NUM_ACS
)
374 sdata
->vif
.hw_queue
[i
] = i
;
376 sdata
->vif
.hw_queue
[i
] = 0;
378 sdata
->vif
.cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
381 int ieee80211_add_virtual_monitor(struct ieee80211_local
*local
)
383 struct ieee80211_sub_if_data
*sdata
;
386 if (!(local
->hw
.flags
& IEEE80211_HW_WANT_MONITOR_VIF
))
391 if (local
->monitor_sdata
)
394 sdata
= kzalloc(sizeof(*sdata
) + local
->hw
.vif_data_size
, GFP_KERNEL
);
399 sdata
->local
= local
;
400 sdata
->vif
.type
= NL80211_IFTYPE_MONITOR
;
401 snprintf(sdata
->name
, IFNAMSIZ
, "%s-monitor",
402 wiphy_name(local
->hw
.wiphy
));
404 ieee80211_set_default_queues(sdata
);
406 ret
= drv_add_interface(local
, sdata
);
408 /* ok .. stupid driver, it asked for this! */
413 ret
= ieee80211_check_queues(sdata
, NL80211_IFTYPE_MONITOR
);
419 ret
= ieee80211_vif_use_channel(sdata
, &local
->monitor_chandef
,
420 IEEE80211_CHANCTX_EXCLUSIVE
);
422 drv_remove_interface(local
, sdata
);
427 mutex_lock(&local
->iflist_mtx
);
428 rcu_assign_pointer(local
->monitor_sdata
, sdata
);
429 mutex_unlock(&local
->iflist_mtx
);
434 void ieee80211_del_virtual_monitor(struct ieee80211_local
*local
)
436 struct ieee80211_sub_if_data
*sdata
;
438 if (!(local
->hw
.flags
& IEEE80211_HW_WANT_MONITOR_VIF
))
443 mutex_lock(&local
->iflist_mtx
);
445 sdata
= rcu_dereference_protected(local
->monitor_sdata
,
446 lockdep_is_held(&local
->iflist_mtx
));
448 mutex_unlock(&local
->iflist_mtx
);
452 rcu_assign_pointer(local
->monitor_sdata
, NULL
);
453 mutex_unlock(&local
->iflist_mtx
);
457 ieee80211_vif_release_channel(sdata
);
459 drv_remove_interface(local
, sdata
);
465 * NOTE: Be very careful when changing this function, it must NOT return
466 * an error on interface type changes that have been pre-checked, so most
467 * checks should be in ieee80211_check_concurrent_iface.
469 int ieee80211_do_open(struct wireless_dev
*wdev
, bool coming_up
)
471 struct ieee80211_sub_if_data
*sdata
= IEEE80211_WDEV_TO_SUB_IF(wdev
);
472 struct net_device
*dev
= wdev
->netdev
;
473 struct ieee80211_local
*local
= sdata
->local
;
474 struct sta_info
*sta
;
477 u32 hw_reconf_flags
= 0;
479 switch (sdata
->vif
.type
) {
480 case NL80211_IFTYPE_WDS
:
481 if (!is_valid_ether_addr(sdata
->u
.wds
.remote_addr
))
484 case NL80211_IFTYPE_AP_VLAN
: {
485 struct ieee80211_sub_if_data
*master
;
490 list_add(&sdata
->u
.vlan
.list
, &sdata
->bss
->vlans
);
492 master
= container_of(sdata
->bss
,
493 struct ieee80211_sub_if_data
, u
.ap
);
494 sdata
->control_port_protocol
=
495 master
->control_port_protocol
;
496 sdata
->control_port_no_encrypt
=
497 master
->control_port_no_encrypt
;
498 sdata
->vif
.cab_queue
= master
->vif
.cab_queue
;
499 memcpy(sdata
->vif
.hw_queue
, master
->vif
.hw_queue
,
500 sizeof(sdata
->vif
.hw_queue
));
503 case NL80211_IFTYPE_AP
:
504 sdata
->bss
= &sdata
->u
.ap
;
506 case NL80211_IFTYPE_MESH_POINT
:
507 case NL80211_IFTYPE_STATION
:
508 case NL80211_IFTYPE_MONITOR
:
509 case NL80211_IFTYPE_ADHOC
:
510 case NL80211_IFTYPE_P2P_DEVICE
:
511 /* no special treatment */
513 case NL80211_IFTYPE_UNSPECIFIED
:
514 case NUM_NL80211_IFTYPES
:
515 case NL80211_IFTYPE_P2P_CLIENT
:
516 case NL80211_IFTYPE_P2P_GO
:
522 if (local
->open_count
== 0) {
523 res
= drv_start(local
);
526 /* we're brought up, everything changes */
527 hw_reconf_flags
= ~0;
528 ieee80211_led_radio(local
, true);
529 ieee80211_mod_tpt_led_trig(local
,
530 IEEE80211_TPT_LEDTRIG_FL_RADIO
, 0);
534 * Copy the hopefully now-present MAC address to
535 * this interface, if it has the special null one.
537 if (dev
&& is_zero_ether_addr(dev
->dev_addr
)) {
538 memcpy(dev
->dev_addr
,
539 local
->hw
.wiphy
->perm_addr
,
541 memcpy(dev
->perm_addr
, dev
->dev_addr
, ETH_ALEN
);
543 if (!is_valid_ether_addr(dev
->dev_addr
)) {
544 res
= -EADDRNOTAVAIL
;
549 switch (sdata
->vif
.type
) {
550 case NL80211_IFTYPE_AP_VLAN
:
551 /* no need to tell driver, but set carrier and chanctx */
552 if (rtnl_dereference(sdata
->bss
->beacon
)) {
553 ieee80211_vif_vlan_copy_chanctx(sdata
);
554 netif_carrier_on(dev
);
556 netif_carrier_off(dev
);
559 case NL80211_IFTYPE_MONITOR
:
560 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
561 local
->cooked_mntrs
++;
565 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
) {
566 res
= drv_add_interface(local
, sdata
);
569 } else if (local
->monitors
== 0 && local
->open_count
== 0) {
570 res
= ieee80211_add_virtual_monitor(local
);
575 /* must be before the call to ieee80211_configure_filter */
577 if (local
->monitors
== 1) {
578 local
->hw
.conf
.flags
|= IEEE80211_CONF_MONITOR
;
579 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
582 ieee80211_adjust_monitor_flags(sdata
, 1);
583 ieee80211_configure_filter(local
);
584 mutex_lock(&local
->mtx
);
585 ieee80211_recalc_idle(local
);
586 mutex_unlock(&local
->mtx
);
588 netif_carrier_on(dev
);
592 ieee80211_del_virtual_monitor(local
);
594 res
= drv_add_interface(local
, sdata
);
597 res
= ieee80211_check_queues(sdata
,
598 ieee80211_vif_type_p2p(&sdata
->vif
));
600 goto err_del_interface
;
603 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
605 local
->fif_probe_req
++;
607 ieee80211_configure_filter(local
);
608 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
609 local
->fif_probe_req
++;
612 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
)
613 changed
|= ieee80211_reset_erp_info(sdata
);
614 ieee80211_bss_info_change_notify(sdata
, changed
);
616 switch (sdata
->vif
.type
) {
617 case NL80211_IFTYPE_STATION
:
618 case NL80211_IFTYPE_ADHOC
:
619 case NL80211_IFTYPE_AP
:
620 case NL80211_IFTYPE_MESH_POINT
:
621 netif_carrier_off(dev
);
623 case NL80211_IFTYPE_WDS
:
624 case NL80211_IFTYPE_P2P_DEVICE
:
632 * set default queue parameters so drivers don't
633 * need to initialise the hardware if the hardware
634 * doesn't start up with sane defaults
636 ieee80211_set_wmm_default(sdata
, true);
639 set_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
641 if (sdata
->vif
.type
== NL80211_IFTYPE_WDS
) {
642 /* Create STA entry for the WDS peer */
643 sta
= sta_info_alloc(sdata
, sdata
->u
.wds
.remote_addr
,
647 goto err_del_interface
;
650 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTH
);
651 sta_info_pre_move_state(sta
, IEEE80211_STA_ASSOC
);
652 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
654 res
= sta_info_insert(sta
);
656 /* STA has been freed */
657 goto err_del_interface
;
660 rate_control_rate_init(sta
);
661 netif_carrier_on(dev
);
662 } else if (sdata
->vif
.type
== NL80211_IFTYPE_P2P_DEVICE
) {
663 rcu_assign_pointer(local
->p2p_sdata
, sdata
);
667 * set_multicast_list will be invoked by the networking core
668 * which will check whether any increments here were done in
669 * error and sync them down to the hardware as filter flags.
671 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
672 atomic_inc(&local
->iff_allmultis
);
674 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
675 atomic_inc(&local
->iff_promiscs
);
681 ieee80211_hw_config(local
, hw_reconf_flags
);
683 ieee80211_recalc_ps(local
, -1);
685 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
686 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
687 /* XXX: for AP_VLAN, actually track AP queues */
688 netif_tx_start_all_queues(dev
);
691 int n_acs
= IEEE80211_NUM_ACS
;
694 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
697 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
698 if (sdata
->vif
.cab_queue
== IEEE80211_INVAL_HW_QUEUE
||
699 (local
->queue_stop_reasons
[sdata
->vif
.cab_queue
] == 0 &&
700 skb_queue_empty(&local
->pending
[sdata
->vif
.cab_queue
]))) {
701 for (ac
= 0; ac
< n_acs
; ac
++) {
702 int ac_queue
= sdata
->vif
.hw_queue
[ac
];
704 if (local
->queue_stop_reasons
[ac_queue
] == 0 &&
705 skb_queue_empty(&local
->pending
[ac_queue
]))
706 netif_start_subqueue(dev
, ac
);
709 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
714 drv_remove_interface(local
, sdata
);
716 if (!local
->open_count
)
720 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
721 list_del(&sdata
->u
.vlan
.list
);
722 /* might already be clear but that doesn't matter */
723 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
727 static int ieee80211_open(struct net_device
*dev
)
729 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
732 /* fail early if user set an invalid address */
733 if (!is_valid_ether_addr(dev
->dev_addr
))
734 return -EADDRNOTAVAIL
;
736 err
= ieee80211_check_concurrent_iface(sdata
, sdata
->vif
.type
);
740 return ieee80211_do_open(&sdata
->wdev
, true);
743 static void ieee80211_do_stop(struct ieee80211_sub_if_data
*sdata
,
746 struct ieee80211_local
*local
= sdata
->local
;
748 struct sk_buff
*skb
, *tmp
;
749 u32 hw_reconf_flags
= 0;
753 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
755 if (rcu_access_pointer(local
->scan_sdata
) == sdata
)
756 ieee80211_scan_cancel(local
);
759 * Stop TX on this interface first.
762 netif_tx_stop_all_queues(sdata
->dev
);
764 ieee80211_roc_purge(local
, sdata
);
766 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
767 ieee80211_mgd_stop(sdata
);
770 * Remove all stations associated with this interface.
772 * This must be done before calling ops->remove_interface()
773 * because otherwise we can later invoke ops->sta_notify()
774 * whenever the STAs are removed, and that invalidates driver
775 * assumptions about always getting a vif pointer that is valid
776 * (because if we remove a STA after ops->remove_interface()
777 * the driver will have removed the vif info already!)
779 * This is relevant only in WDS mode, in all other modes we've
780 * already removed all stations when disconnecting or similar,
783 * We call sta_info_flush_cleanup() later, to combine RCU waits.
785 flushed
= sta_info_flush_defer(sdata
);
786 WARN_ON_ONCE((sdata
->vif
.type
!= NL80211_IFTYPE_WDS
&& flushed
> 0) ||
787 (sdata
->vif
.type
== NL80211_IFTYPE_WDS
&& flushed
!= 1));
789 /* don't count this interface for promisc/allmulti while it is down */
790 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
791 atomic_dec(&local
->iff_allmultis
);
793 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
794 atomic_dec(&local
->iff_promiscs
);
796 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
798 local
->fif_probe_req
--;
799 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
800 local
->fif_probe_req
--;
804 netif_addr_lock_bh(sdata
->dev
);
805 spin_lock_bh(&local
->filter_lock
);
806 __hw_addr_unsync(&local
->mc_list
, &sdata
->dev
->mc
,
807 sdata
->dev
->addr_len
);
808 spin_unlock_bh(&local
->filter_lock
);
809 netif_addr_unlock_bh(sdata
->dev
);
812 del_timer_sync(&local
->dynamic_ps_timer
);
813 cancel_work_sync(&local
->dynamic_ps_enable_work
);
815 cancel_work_sync(&sdata
->recalc_smps
);
816 sdata
->vif
.csa_active
= false;
817 cancel_work_sync(&sdata
->csa_finalize_work
);
819 cancel_delayed_work_sync(&sdata
->dfs_cac_timer_work
);
821 if (sdata
->wdev
.cac_started
) {
822 WARN_ON(local
->suspended
);
823 mutex_lock(&local
->iflist_mtx
);
824 ieee80211_vif_release_channel(sdata
);
825 mutex_unlock(&local
->iflist_mtx
);
826 cfg80211_cac_event(sdata
->dev
, NL80211_RADAR_CAC_ABORTED
,
830 /* APs need special treatment */
831 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
832 struct ieee80211_sub_if_data
*vlan
, *tmpsdata
;
834 /* down all dependent devices, that is VLANs */
835 list_for_each_entry_safe(vlan
, tmpsdata
, &sdata
->u
.ap
.vlans
,
837 dev_close(vlan
->dev
);
838 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
839 } else if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
840 /* remove all packets in parent bc_buf pointing to this dev */
841 ps
= &sdata
->bss
->ps
;
843 spin_lock_irqsave(&ps
->bc_buf
.lock
, flags
);
844 skb_queue_walk_safe(&ps
->bc_buf
, skb
, tmp
) {
845 if (skb
->dev
== sdata
->dev
) {
846 __skb_unlink(skb
, &ps
->bc_buf
);
847 local
->total_ps_buffered
--;
848 ieee80211_free_txskb(&local
->hw
, skb
);
851 spin_unlock_irqrestore(&ps
->bc_buf
.lock
, flags
);
857 switch (sdata
->vif
.type
) {
858 case NL80211_IFTYPE_AP_VLAN
:
859 list_del(&sdata
->u
.vlan
.list
);
860 rcu_assign_pointer(sdata
->vif
.chanctx_conf
, NULL
);
861 /* no need to tell driver */
863 case NL80211_IFTYPE_MONITOR
:
864 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
865 local
->cooked_mntrs
--;
870 if (local
->monitors
== 0) {
871 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_MONITOR
;
872 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
875 ieee80211_adjust_monitor_flags(sdata
, -1);
877 case NL80211_IFTYPE_P2P_DEVICE
:
878 /* relies on synchronize_rcu() below */
879 rcu_assign_pointer(local
->p2p_sdata
, NULL
);
882 cancel_work_sync(&sdata
->work
);
884 * When we get here, the interface is marked down.
886 * sta_info_flush_cleanup() requires rcu_barrier()
887 * first to wait for the station call_rcu() calls
888 * to complete, and we also need synchronize_rcu()
889 * to wait for the RX path in case it is using the
890 * interface and enqueuing frames at this very time on
895 sta_info_flush_cleanup(sdata
);
898 * Free all remaining keys, there shouldn't be any,
899 * except maybe in WDS mode?
901 ieee80211_free_keys(sdata
);
904 case NL80211_IFTYPE_AP
:
905 skb_queue_purge(&sdata
->skb_queue
);
910 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
911 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
912 skb_queue_walk_safe(&local
->pending
[i
], skb
, tmp
) {
913 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
914 if (info
->control
.vif
== &sdata
->vif
) {
915 __skb_unlink(skb
, &local
->pending
[i
]);
916 ieee80211_free_txskb(&local
->hw
, skb
);
920 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
922 if (local
->open_count
== 0)
923 ieee80211_clear_tx_pending(local
);
926 * If the interface goes down while suspended, presumably because
927 * the device was unplugged and that happens before our resume,
928 * then the driver is already unconfigured and the remainder of
929 * this function isn't needed.
930 * XXX: what about WoWLAN? If the device has software state, e.g.
931 * memory allocated, it might expect teardown commands from
934 if (local
->suspended
) {
935 WARN_ON(local
->wowlan
);
936 WARN_ON(rtnl_dereference(local
->monitor_sdata
));
940 switch (sdata
->vif
.type
) {
941 case NL80211_IFTYPE_AP_VLAN
:
943 case NL80211_IFTYPE_MONITOR
:
944 if (local
->monitors
== 0)
945 ieee80211_del_virtual_monitor(local
);
947 mutex_lock(&local
->mtx
);
948 ieee80211_recalc_idle(local
);
949 mutex_unlock(&local
->mtx
);
951 if (!(sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
))
957 drv_remove_interface(local
, sdata
);
960 ieee80211_recalc_ps(local
, -1);
962 if (local
->open_count
== 0) {
963 ieee80211_stop_device(local
);
965 /* no reconfiguring after stop! */
969 /* do after stop to avoid reconfiguring when we stop anyway */
970 ieee80211_configure_filter(local
);
971 ieee80211_hw_config(local
, hw_reconf_flags
);
973 if (local
->monitors
== local
->open_count
)
974 ieee80211_add_virtual_monitor(local
);
977 static int ieee80211_stop(struct net_device
*dev
)
979 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
981 ieee80211_do_stop(sdata
, true);
986 static void ieee80211_set_multicast_list(struct net_device
*dev
)
988 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
989 struct ieee80211_local
*local
= sdata
->local
;
990 int allmulti
, promisc
, sdata_allmulti
, sdata_promisc
;
992 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
993 promisc
= !!(dev
->flags
& IFF_PROMISC
);
994 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
995 sdata_promisc
= !!(sdata
->flags
& IEEE80211_SDATA_PROMISC
);
997 if (allmulti
!= sdata_allmulti
) {
998 if (dev
->flags
& IFF_ALLMULTI
)
999 atomic_inc(&local
->iff_allmultis
);
1001 atomic_dec(&local
->iff_allmultis
);
1002 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
1005 if (promisc
!= sdata_promisc
) {
1006 if (dev
->flags
& IFF_PROMISC
)
1007 atomic_inc(&local
->iff_promiscs
);
1009 atomic_dec(&local
->iff_promiscs
);
1010 sdata
->flags
^= IEEE80211_SDATA_PROMISC
;
1014 * TODO: If somebody needs this on AP interfaces,
1015 * it can be enabled easily but multicast
1016 * addresses from VLANs need to be synced.
1018 if (sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
1019 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
1020 sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
1021 drv_set_multicast_list(local
, sdata
, &dev
->mc
);
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
)
1038 /* free extra data */
1039 ieee80211_free_keys(sdata
);
1041 ieee80211_debugfs_remove_netdev(sdata
);
1043 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
1044 __skb_queue_purge(&sdata
->fragments
[i
].skb_list
);
1045 sdata
->fragment_next
= 0;
1047 if (ieee80211_vif_is_mesh(&sdata
->vif
))
1048 mesh_rmc_free(sdata
);
1050 flushed
= sta_info_flush(sdata
);
1054 static void ieee80211_uninit(struct net_device
*dev
)
1056 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev
));
1059 static u16
ieee80211_netdev_select_queue(struct net_device
*dev
,
1060 struct sk_buff
*skb
)
1062 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev
), skb
);
1065 static const struct net_device_ops ieee80211_dataif_ops
= {
1066 .ndo_open
= ieee80211_open
,
1067 .ndo_stop
= ieee80211_stop
,
1068 .ndo_uninit
= ieee80211_uninit
,
1069 .ndo_start_xmit
= ieee80211_subif_start_xmit
,
1070 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
1071 .ndo_change_mtu
= ieee80211_change_mtu
,
1072 .ndo_set_mac_address
= ieee80211_change_mac
,
1073 .ndo_select_queue
= ieee80211_netdev_select_queue
,
1076 static u16
ieee80211_monitor_select_queue(struct net_device
*dev
,
1077 struct sk_buff
*skb
)
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;
1270 sdata
->noack_map
= 0;
1272 /* only monitor/p2p-device differ */
1274 sdata
->dev
->netdev_ops
= &ieee80211_dataif_ops
;
1275 sdata
->dev
->type
= ARPHRD_ETHER
;
1278 skb_queue_head_init(&sdata
->skb_queue
);
1279 INIT_WORK(&sdata
->work
, ieee80211_iface_work
);
1280 INIT_WORK(&sdata
->recalc_smps
, ieee80211_recalc_smps_work
);
1281 INIT_WORK(&sdata
->csa_finalize_work
, ieee80211_csa_finalize_work
);
1284 case NL80211_IFTYPE_P2P_GO
:
1285 type
= NL80211_IFTYPE_AP
;
1286 sdata
->vif
.type
= type
;
1287 sdata
->vif
.p2p
= true;
1289 case NL80211_IFTYPE_AP
:
1290 skb_queue_head_init(&sdata
->u
.ap
.ps
.bc_buf
);
1291 INIT_LIST_HEAD(&sdata
->u
.ap
.vlans
);
1292 sdata
->vif
.bss_conf
.bssid
= sdata
->vif
.addr
;
1294 case NL80211_IFTYPE_P2P_CLIENT
:
1295 type
= NL80211_IFTYPE_STATION
;
1296 sdata
->vif
.type
= type
;
1297 sdata
->vif
.p2p
= true;
1299 case NL80211_IFTYPE_STATION
:
1300 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.mgd
.bssid
;
1301 ieee80211_sta_setup_sdata(sdata
);
1303 case NL80211_IFTYPE_ADHOC
:
1304 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.ibss
.bssid
;
1305 ieee80211_ibss_setup_sdata(sdata
);
1307 case NL80211_IFTYPE_MESH_POINT
:
1308 if (ieee80211_vif_is_mesh(&sdata
->vif
))
1309 ieee80211_mesh_init_sdata(sdata
);
1311 case NL80211_IFTYPE_MONITOR
:
1312 sdata
->dev
->type
= ARPHRD_IEEE80211_RADIOTAP
;
1313 sdata
->dev
->netdev_ops
= &ieee80211_monitorif_ops
;
1314 sdata
->u
.mntr_flags
= MONITOR_FLAG_CONTROL
|
1315 MONITOR_FLAG_OTHER_BSS
;
1317 case NL80211_IFTYPE_WDS
:
1318 sdata
->vif
.bss_conf
.bssid
= NULL
;
1320 case NL80211_IFTYPE_AP_VLAN
:
1322 case NL80211_IFTYPE_P2P_DEVICE
:
1323 sdata
->vif
.bss_conf
.bssid
= sdata
->vif
.addr
;
1325 case NL80211_IFTYPE_UNSPECIFIED
:
1326 case NUM_NL80211_IFTYPES
:
1331 ieee80211_debugfs_add_netdev(sdata
);
1334 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data
*sdata
,
1335 enum nl80211_iftype type
)
1337 struct ieee80211_local
*local
= sdata
->local
;
1339 enum nl80211_iftype internal_type
= type
;
1344 if (!local
->ops
->change_interface
)
1347 switch (sdata
->vif
.type
) {
1348 case NL80211_IFTYPE_AP
:
1349 case NL80211_IFTYPE_STATION
:
1350 case NL80211_IFTYPE_ADHOC
:
1352 * Could maybe also all others here?
1353 * Just not sure how that interacts
1354 * with the RX/config path e.g. for
1363 case NL80211_IFTYPE_AP
:
1364 case NL80211_IFTYPE_STATION
:
1365 case NL80211_IFTYPE_ADHOC
:
1367 * Could probably support everything
1368 * but WDS here (WDS do_open can fail
1369 * under memory pressure, which this
1370 * code isn't prepared to handle).
1373 case NL80211_IFTYPE_P2P_CLIENT
:
1375 internal_type
= NL80211_IFTYPE_STATION
;
1377 case NL80211_IFTYPE_P2P_GO
:
1379 internal_type
= NL80211_IFTYPE_AP
;
1385 ret
= ieee80211_check_concurrent_iface(sdata
, internal_type
);
1389 ieee80211_do_stop(sdata
, false);
1391 ieee80211_teardown_sdata(sdata
);
1393 ret
= drv_change_interface(local
, sdata
, internal_type
, p2p
);
1395 type
= ieee80211_vif_type_p2p(&sdata
->vif
);
1398 * Ignore return value here, there's not much we can do since
1399 * the driver changed the interface type internally already.
1400 * The warnings will hopefully make driver authors fix it :-)
1402 ieee80211_check_queues(sdata
, type
);
1404 ieee80211_setup_sdata(sdata
, type
);
1406 err
= ieee80211_do_open(&sdata
->wdev
, false);
1407 WARN(err
, "type change: do_open returned %d", err
);
1412 int ieee80211_if_change_type(struct ieee80211_sub_if_data
*sdata
,
1413 enum nl80211_iftype type
)
1419 if (type
== ieee80211_vif_type_p2p(&sdata
->vif
))
1422 if (ieee80211_sdata_running(sdata
)) {
1423 ret
= ieee80211_runtime_change_iftype(sdata
, type
);
1427 /* Purge and reset type-dependent state. */
1428 ieee80211_teardown_sdata(sdata
);
1429 ieee80211_setup_sdata(sdata
, type
);
1432 /* reset some values that shouldn't be kept across type changes */
1433 sdata
->drop_unencrypted
= 0;
1434 if (type
== NL80211_IFTYPE_STATION
)
1435 sdata
->u
.mgd
.use_4addr
= false;
1440 static void ieee80211_assign_perm_addr(struct ieee80211_local
*local
,
1441 u8
*perm_addr
, enum nl80211_iftype type
)
1443 struct ieee80211_sub_if_data
*sdata
;
1444 u64 mask
, start
, addr
, val
, inc
;
1446 u8 tmp_addr
[ETH_ALEN
];
1449 /* default ... something at least */
1450 memcpy(perm_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
1452 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
) &&
1453 local
->hw
.wiphy
->n_addresses
<= 1)
1456 mutex_lock(&local
->iflist_mtx
);
1459 case NL80211_IFTYPE_MONITOR
:
1460 /* doesn't matter */
1462 case NL80211_IFTYPE_WDS
:
1463 case NL80211_IFTYPE_AP_VLAN
:
1464 /* match up with an AP interface */
1465 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1466 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
1468 memcpy(perm_addr
, sdata
->vif
.addr
, ETH_ALEN
);
1471 /* keep default if no AP interface present */
1473 case NL80211_IFTYPE_P2P_CLIENT
:
1474 case NL80211_IFTYPE_P2P_GO
:
1475 if (local
->hw
.flags
& IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF
) {
1476 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1477 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
)
1479 if (!ieee80211_sdata_running(sdata
))
1481 memcpy(perm_addr
, sdata
->vif
.addr
, ETH_ALEN
);
1485 /* otherwise fall through */
1487 /* assign a new address if possible -- try n_addresses first */
1488 for (i
= 0; i
< local
->hw
.wiphy
->n_addresses
; i
++) {
1491 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1492 if (memcmp(local
->hw
.wiphy
->addresses
[i
].addr
,
1493 sdata
->vif
.addr
, ETH_ALEN
) == 0) {
1501 local
->hw
.wiphy
->addresses
[i
].addr
,
1507 /* try mask if available */
1508 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
))
1511 m
= local
->hw
.wiphy
->addr_mask
;
1512 mask
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1513 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1514 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1516 if (__ffs64(mask
) + hweight64(mask
) != fls64(mask
)) {
1517 /* not a contiguous mask ... not handled now! */
1518 pr_info("not contiguous\n");
1523 * Pick address of existing interface in case user changed
1524 * MAC address manually, default to perm_addr.
1526 m
= local
->hw
.wiphy
->perm_addr
;
1527 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1528 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
)
1530 m
= sdata
->vif
.addr
;
1533 start
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1534 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1535 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1537 inc
= 1ULL<<__ffs64(mask
);
1538 val
= (start
& mask
);
1539 addr
= (start
& ~mask
) | (val
& mask
);
1543 tmp_addr
[5] = addr
>> 0*8;
1544 tmp_addr
[4] = addr
>> 1*8;
1545 tmp_addr
[3] = addr
>> 2*8;
1546 tmp_addr
[2] = addr
>> 3*8;
1547 tmp_addr
[1] = addr
>> 4*8;
1548 tmp_addr
[0] = addr
>> 5*8;
1552 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1553 if (memcmp(tmp_addr
, sdata
->vif
.addr
,
1561 memcpy(perm_addr
, tmp_addr
, ETH_ALEN
);
1564 addr
= (start
& ~mask
) | (val
& mask
);
1565 } while (addr
!= start
);
1571 mutex_unlock(&local
->iflist_mtx
);
1574 static void ieee80211_cleanup_sdata_stas_wk(struct work_struct
*wk
)
1576 struct ieee80211_sub_if_data
*sdata
;
1578 sdata
= container_of(wk
, struct ieee80211_sub_if_data
, cleanup_stations_wk
);
1580 ieee80211_cleanup_sdata_stas(sdata
);
1583 int ieee80211_if_add(struct ieee80211_local
*local
, const char *name
,
1584 struct wireless_dev
**new_wdev
, enum nl80211_iftype type
,
1585 struct vif_params
*params
)
1587 struct net_device
*ndev
= NULL
;
1588 struct ieee80211_sub_if_data
*sdata
= NULL
;
1594 if (type
== NL80211_IFTYPE_P2P_DEVICE
) {
1595 struct wireless_dev
*wdev
;
1597 sdata
= kzalloc(sizeof(*sdata
) + local
->hw
.vif_data_size
,
1601 wdev
= &sdata
->wdev
;
1604 strlcpy(sdata
->name
, name
, IFNAMSIZ
);
1605 ieee80211_assign_perm_addr(local
, wdev
->address
, type
);
1606 memcpy(sdata
->vif
.addr
, wdev
->address
, ETH_ALEN
);
1608 if (local
->hw
.queues
>= IEEE80211_NUM_ACS
)
1609 txqs
= IEEE80211_NUM_ACS
;
1611 ndev
= alloc_netdev_mqs(sizeof(*sdata
) +
1612 local
->hw
.vif_data_size
,
1613 name
, ieee80211_if_setup
, txqs
, 1);
1616 dev_net_set(ndev
, wiphy_net(local
->hw
.wiphy
));
1618 ndev
->needed_headroom
= local
->tx_headroom
+
1619 4*6 /* four MAC addresses */
1620 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1622 + 8 /* rfc1042/bridge tunnel */
1623 - ETH_HLEN
/* ethernet hard_header_len */
1624 + IEEE80211_ENCRYPT_HEADROOM
;
1625 ndev
->needed_tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
1627 ret
= dev_alloc_name(ndev
, ndev
->name
);
1633 ieee80211_assign_perm_addr(local
, ndev
->perm_addr
, type
);
1634 memcpy(ndev
->dev_addr
, ndev
->perm_addr
, ETH_ALEN
);
1635 SET_NETDEV_DEV(ndev
, wiphy_dev(local
->hw
.wiphy
));
1637 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1638 sdata
= netdev_priv(ndev
);
1639 ndev
->ieee80211_ptr
= &sdata
->wdev
;
1640 memcpy(sdata
->vif
.addr
, ndev
->dev_addr
, ETH_ALEN
);
1641 memcpy(sdata
->name
, ndev
->name
, IFNAMSIZ
);
1646 /* initialise type-independent data */
1647 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
1648 sdata
->local
= local
;
1650 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
1651 skb_queue_head_init(&sdata
->fragments
[i
].skb_list
);
1653 INIT_LIST_HEAD(&sdata
->key_list
);
1655 spin_lock_init(&sdata
->cleanup_stations_lock
);
1656 INIT_LIST_HEAD(&sdata
->cleanup_stations
);
1657 INIT_WORK(&sdata
->cleanup_stations_wk
, ieee80211_cleanup_sdata_stas_wk
);
1658 INIT_DELAYED_WORK(&sdata
->dfs_cac_timer_work
,
1659 ieee80211_dfs_cac_timer_work
);
1660 INIT_DELAYED_WORK(&sdata
->dec_tailroom_needed_wk
,
1661 ieee80211_delayed_tailroom_dec
);
1663 for (i
= 0; i
< IEEE80211_NUM_BANDS
; i
++) {
1664 struct ieee80211_supported_band
*sband
;
1665 sband
= local
->hw
.wiphy
->bands
[i
];
1666 sdata
->rc_rateidx_mask
[i
] =
1667 sband
? (1 << sband
->n_bitrates
) - 1 : 0;
1669 memcpy(sdata
->rc_rateidx_mcs_mask
[i
],
1670 sband
->ht_cap
.mcs
.rx_mask
,
1671 sizeof(sdata
->rc_rateidx_mcs_mask
[i
]));
1673 memset(sdata
->rc_rateidx_mcs_mask
[i
], 0,
1674 sizeof(sdata
->rc_rateidx_mcs_mask
[i
]));
1677 ieee80211_set_default_queues(sdata
);
1679 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
1680 sdata
->user_power_level
= local
->user_power_level
;
1682 /* setup type-dependent data */
1683 ieee80211_setup_sdata(sdata
, type
);
1687 ndev
->ieee80211_ptr
->use_4addr
= params
->use_4addr
;
1688 if (type
== NL80211_IFTYPE_STATION
)
1689 sdata
->u
.mgd
.use_4addr
= params
->use_4addr
;
1692 ndev
->features
|= local
->hw
.netdev_features
;
1694 ret
= register_netdevice(ndev
);
1701 mutex_lock(&local
->iflist_mtx
);
1702 list_add_tail_rcu(&sdata
->list
, &local
->interfaces
);
1703 mutex_unlock(&local
->iflist_mtx
);
1706 *new_wdev
= &sdata
->wdev
;
1711 void ieee80211_if_remove(struct ieee80211_sub_if_data
*sdata
)
1715 mutex_lock(&sdata
->local
->iflist_mtx
);
1716 list_del_rcu(&sdata
->list
);
1717 mutex_unlock(&sdata
->local
->iflist_mtx
);
1722 unregister_netdevice(sdata
->dev
);
1724 cfg80211_unregister_wdev(&sdata
->wdev
);
1729 void ieee80211_sdata_stop(struct ieee80211_sub_if_data
*sdata
)
1731 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING
, &sdata
->state
)))
1733 ieee80211_do_stop(sdata
, true);
1734 ieee80211_teardown_sdata(sdata
);
1738 * Remove all interfaces, may only be called at hardware unregistration
1739 * time because it doesn't do RCU-safe list removals.
1741 void ieee80211_remove_interfaces(struct ieee80211_local
*local
)
1743 struct ieee80211_sub_if_data
*sdata
, *tmp
;
1744 LIST_HEAD(unreg_list
);
1745 LIST_HEAD(wdev_list
);
1750 * Close all AP_VLAN interfaces first, as otherwise they
1751 * might be closed while the AP interface they belong to
1752 * is closed, causing unregister_netdevice_many() to crash.
1754 list_for_each_entry(sdata
, &local
->interfaces
, list
)
1755 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
1756 dev_close(sdata
->dev
);
1758 mutex_lock(&local
->iflist_mtx
);
1759 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
1760 list_del(&sdata
->list
);
1763 unregister_netdevice_queue(sdata
->dev
, &unreg_list
);
1765 list_add(&sdata
->list
, &wdev_list
);
1767 mutex_unlock(&local
->iflist_mtx
);
1768 unregister_netdevice_many(&unreg_list
);
1769 list_del(&unreg_list
);
1771 list_for_each_entry_safe(sdata
, tmp
, &wdev_list
, list
) {
1772 list_del(&sdata
->list
);
1773 cfg80211_unregister_wdev(&sdata
->wdev
);
1778 static int netdev_notify(struct notifier_block
*nb
,
1779 unsigned long state
, void *ptr
)
1781 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
1782 struct ieee80211_sub_if_data
*sdata
;
1784 if (state
!= NETDEV_CHANGENAME
)
1787 if (!dev
->ieee80211_ptr
|| !dev
->ieee80211_ptr
->wiphy
)
1790 if (dev
->ieee80211_ptr
->wiphy
->privid
!= mac80211_wiphy_privid
)
1793 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1795 memcpy(sdata
->name
, dev
->name
, IFNAMSIZ
);
1797 ieee80211_debugfs_rename_netdev(sdata
);
1801 static struct notifier_block mac80211_netdev_notifier
= {
1802 .notifier_call
= netdev_notify
,
1805 int ieee80211_iface_init(void)
1807 return register_netdevice_notifier(&mac80211_netdev_notifier
);
1810 void ieee80211_iface_exit(void)
1812 unregister_netdevice_notifier(&mac80211_netdev_notifier
);