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
;
257 /* we hold the RTNL here so can safely walk the list */
258 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
259 if (nsdata
!= sdata
&& ieee80211_sdata_running(nsdata
)) {
261 * Allow only a single IBSS interface to be up at any
262 * time. This is restricted because beacon distribution
263 * cannot work properly if both are in the same IBSS.
265 * To remove this restriction we'd have to disallow them
266 * from setting the same SSID on different IBSS interfaces
267 * belonging to the same hardware. Then, however, we're
268 * faced with having to adopt two different TSF timers...
270 if (iftype
== NL80211_IFTYPE_ADHOC
&&
271 nsdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
274 * will not add another interface while any channel
277 if (nsdata
->vif
.csa_active
)
281 * The remaining checks are only performed for interfaces
282 * with the same MAC address.
284 if (!ether_addr_equal(sdata
->vif
.addr
,
289 * check whether it may have the same address
291 if (!identical_mac_addr_allowed(iftype
,
296 * can only add VLANs to enabled APs
298 if (iftype
== NL80211_IFTYPE_AP_VLAN
&&
299 nsdata
->vif
.type
== NL80211_IFTYPE_AP
)
300 sdata
->bss
= &nsdata
->u
.ap
;
304 mutex_lock(&local
->chanctx_mtx
);
305 ret
= ieee80211_check_combinations(sdata
, NULL
, 0, 0);
306 mutex_unlock(&local
->chanctx_mtx
);
310 static int ieee80211_check_queues(struct ieee80211_sub_if_data
*sdata
,
311 enum nl80211_iftype iftype
)
313 int n_queues
= sdata
->local
->hw
.queues
;
316 if (iftype
!= NL80211_IFTYPE_P2P_DEVICE
) {
317 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
318 if (WARN_ON_ONCE(sdata
->vif
.hw_queue
[i
] ==
319 IEEE80211_INVAL_HW_QUEUE
))
321 if (WARN_ON_ONCE(sdata
->vif
.hw_queue
[i
] >=
327 if ((iftype
!= NL80211_IFTYPE_AP
&&
328 iftype
!= NL80211_IFTYPE_P2P_GO
&&
329 iftype
!= NL80211_IFTYPE_MESH_POINT
) ||
330 !(sdata
->local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)) {
331 sdata
->vif
.cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
335 if (WARN_ON_ONCE(sdata
->vif
.cab_queue
== IEEE80211_INVAL_HW_QUEUE
))
338 if (WARN_ON_ONCE(sdata
->vif
.cab_queue
>= n_queues
))
344 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data
*sdata
,
347 struct ieee80211_local
*local
= sdata
->local
;
348 u32 flags
= sdata
->u
.mntr_flags
;
350 #define ADJUST(_f, _s) do { \
351 if (flags & MONITOR_FLAG_##_f) \
352 local->fif_##_s += offset; \
355 ADJUST(FCSFAIL
, fcsfail
);
356 ADJUST(PLCPFAIL
, plcpfail
);
357 ADJUST(CONTROL
, control
);
358 ADJUST(CONTROL
, pspoll
);
359 ADJUST(OTHER_BSS
, other_bss
);
364 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data
*sdata
)
366 struct ieee80211_local
*local
= sdata
->local
;
369 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
370 if (local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)
371 sdata
->vif
.hw_queue
[i
] = IEEE80211_INVAL_HW_QUEUE
;
372 else if (local
->hw
.queues
>= IEEE80211_NUM_ACS
)
373 sdata
->vif
.hw_queue
[i
] = i
;
375 sdata
->vif
.hw_queue
[i
] = 0;
377 sdata
->vif
.cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
380 int ieee80211_add_virtual_monitor(struct ieee80211_local
*local
)
382 struct ieee80211_sub_if_data
*sdata
;
385 if (!(local
->hw
.flags
& IEEE80211_HW_WANT_MONITOR_VIF
))
390 if (local
->monitor_sdata
)
393 sdata
= kzalloc(sizeof(*sdata
) + local
->hw
.vif_data_size
, GFP_KERNEL
);
398 sdata
->local
= local
;
399 sdata
->vif
.type
= NL80211_IFTYPE_MONITOR
;
400 snprintf(sdata
->name
, IFNAMSIZ
, "%s-monitor",
401 wiphy_name(local
->hw
.wiphy
));
403 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
405 ieee80211_set_default_queues(sdata
);
407 ret
= drv_add_interface(local
, sdata
);
409 /* ok .. stupid driver, it asked for this! */
414 ret
= ieee80211_check_queues(sdata
, NL80211_IFTYPE_MONITOR
);
420 mutex_lock(&local
->iflist_mtx
);
421 rcu_assign_pointer(local
->monitor_sdata
, sdata
);
422 mutex_unlock(&local
->iflist_mtx
);
424 mutex_lock(&local
->mtx
);
425 ret
= ieee80211_vif_use_channel(sdata
, &local
->monitor_chandef
,
426 IEEE80211_CHANCTX_EXCLUSIVE
);
427 mutex_unlock(&local
->mtx
);
429 mutex_lock(&local
->iflist_mtx
);
430 RCU_INIT_POINTER(local
->monitor_sdata
, NULL
);
431 mutex_unlock(&local
->iflist_mtx
);
433 drv_remove_interface(local
, sdata
);
441 void ieee80211_del_virtual_monitor(struct ieee80211_local
*local
)
443 struct ieee80211_sub_if_data
*sdata
;
445 if (!(local
->hw
.flags
& IEEE80211_HW_WANT_MONITOR_VIF
))
450 mutex_lock(&local
->iflist_mtx
);
452 sdata
= rcu_dereference_protected(local
->monitor_sdata
,
453 lockdep_is_held(&local
->iflist_mtx
));
455 mutex_unlock(&local
->iflist_mtx
);
459 RCU_INIT_POINTER(local
->monitor_sdata
, NULL
);
460 mutex_unlock(&local
->iflist_mtx
);
464 mutex_lock(&local
->mtx
);
465 ieee80211_vif_release_channel(sdata
);
466 mutex_unlock(&local
->mtx
);
468 drv_remove_interface(local
, sdata
);
474 * NOTE: Be very careful when changing this function, it must NOT return
475 * an error on interface type changes that have been pre-checked, so most
476 * checks should be in ieee80211_check_concurrent_iface.
478 int ieee80211_do_open(struct wireless_dev
*wdev
, bool coming_up
)
480 struct ieee80211_sub_if_data
*sdata
= IEEE80211_WDEV_TO_SUB_IF(wdev
);
481 struct net_device
*dev
= wdev
->netdev
;
482 struct ieee80211_local
*local
= sdata
->local
;
483 struct sta_info
*sta
;
486 u32 hw_reconf_flags
= 0;
488 switch (sdata
->vif
.type
) {
489 case NL80211_IFTYPE_WDS
:
490 if (!is_valid_ether_addr(sdata
->u
.wds
.remote_addr
))
493 case NL80211_IFTYPE_AP_VLAN
: {
494 struct ieee80211_sub_if_data
*master
;
499 mutex_lock(&local
->mtx
);
500 list_add(&sdata
->u
.vlan
.list
, &sdata
->bss
->vlans
);
501 mutex_unlock(&local
->mtx
);
503 master
= container_of(sdata
->bss
,
504 struct ieee80211_sub_if_data
, u
.ap
);
505 sdata
->control_port_protocol
=
506 master
->control_port_protocol
;
507 sdata
->control_port_no_encrypt
=
508 master
->control_port_no_encrypt
;
509 sdata
->vif
.cab_queue
= master
->vif
.cab_queue
;
510 memcpy(sdata
->vif
.hw_queue
, master
->vif
.hw_queue
,
511 sizeof(sdata
->vif
.hw_queue
));
514 case NL80211_IFTYPE_AP
:
515 sdata
->bss
= &sdata
->u
.ap
;
517 case NL80211_IFTYPE_MESH_POINT
:
518 case NL80211_IFTYPE_STATION
:
519 case NL80211_IFTYPE_MONITOR
:
520 case NL80211_IFTYPE_ADHOC
:
521 case NL80211_IFTYPE_P2P_DEVICE
:
522 /* no special treatment */
524 case NL80211_IFTYPE_UNSPECIFIED
:
525 case NUM_NL80211_IFTYPES
:
526 case NL80211_IFTYPE_P2P_CLIENT
:
527 case NL80211_IFTYPE_P2P_GO
:
533 if (local
->open_count
== 0) {
534 res
= drv_start(local
);
537 /* we're brought up, everything changes */
538 hw_reconf_flags
= ~0;
539 ieee80211_led_radio(local
, true);
540 ieee80211_mod_tpt_led_trig(local
,
541 IEEE80211_TPT_LEDTRIG_FL_RADIO
, 0);
545 * Copy the hopefully now-present MAC address to
546 * this interface, if it has the special null one.
548 if (dev
&& is_zero_ether_addr(dev
->dev_addr
)) {
549 memcpy(dev
->dev_addr
,
550 local
->hw
.wiphy
->perm_addr
,
552 memcpy(dev
->perm_addr
, dev
->dev_addr
, ETH_ALEN
);
554 if (!is_valid_ether_addr(dev
->dev_addr
)) {
555 res
= -EADDRNOTAVAIL
;
560 switch (sdata
->vif
.type
) {
561 case NL80211_IFTYPE_AP_VLAN
:
562 /* no need to tell driver, but set carrier and chanctx */
563 if (rtnl_dereference(sdata
->bss
->beacon
)) {
564 ieee80211_vif_vlan_copy_chanctx(sdata
);
565 netif_carrier_on(dev
);
567 netif_carrier_off(dev
);
570 case NL80211_IFTYPE_MONITOR
:
571 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
572 local
->cooked_mntrs
++;
576 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
) {
577 res
= drv_add_interface(local
, sdata
);
580 } else if (local
->monitors
== 0 && local
->open_count
== 0) {
581 res
= ieee80211_add_virtual_monitor(local
);
586 /* must be before the call to ieee80211_configure_filter */
588 if (local
->monitors
== 1) {
589 local
->hw
.conf
.flags
|= IEEE80211_CONF_MONITOR
;
590 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
593 ieee80211_adjust_monitor_flags(sdata
, 1);
594 ieee80211_configure_filter(local
);
595 mutex_lock(&local
->mtx
);
596 ieee80211_recalc_idle(local
);
597 mutex_unlock(&local
->mtx
);
599 netif_carrier_on(dev
);
603 ieee80211_del_virtual_monitor(local
);
605 res
= drv_add_interface(local
, sdata
);
608 res
= ieee80211_check_queues(sdata
,
609 ieee80211_vif_type_p2p(&sdata
->vif
));
611 goto err_del_interface
;
614 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
616 local
->fif_probe_req
++;
618 ieee80211_configure_filter(local
);
619 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
620 local
->fif_probe_req
++;
623 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
)
624 changed
|= ieee80211_reset_erp_info(sdata
);
625 ieee80211_bss_info_change_notify(sdata
, changed
);
627 switch (sdata
->vif
.type
) {
628 case NL80211_IFTYPE_STATION
:
629 case NL80211_IFTYPE_ADHOC
:
630 case NL80211_IFTYPE_AP
:
631 case NL80211_IFTYPE_MESH_POINT
:
632 netif_carrier_off(dev
);
634 case NL80211_IFTYPE_WDS
:
635 case NL80211_IFTYPE_P2P_DEVICE
:
643 * set default queue parameters so drivers don't
644 * need to initialise the hardware if the hardware
645 * doesn't start up with sane defaults
647 ieee80211_set_wmm_default(sdata
, true);
650 set_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
652 if (sdata
->vif
.type
== NL80211_IFTYPE_WDS
) {
653 /* Create STA entry for the WDS peer */
654 sta
= sta_info_alloc(sdata
, sdata
->u
.wds
.remote_addr
,
658 goto err_del_interface
;
661 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTH
);
662 sta_info_pre_move_state(sta
, IEEE80211_STA_ASSOC
);
663 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
665 res
= sta_info_insert(sta
);
667 /* STA has been freed */
668 goto err_del_interface
;
671 rate_control_rate_init(sta
);
672 netif_carrier_on(dev
);
673 } else if (sdata
->vif
.type
== NL80211_IFTYPE_P2P_DEVICE
) {
674 rcu_assign_pointer(local
->p2p_sdata
, sdata
);
678 * set_multicast_list will be invoked by the networking core
679 * which will check whether any increments here were done in
680 * error and sync them down to the hardware as filter flags.
682 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
683 atomic_inc(&local
->iff_allmultis
);
685 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
686 atomic_inc(&local
->iff_promiscs
);
692 ieee80211_hw_config(local
, hw_reconf_flags
);
694 ieee80211_recalc_ps(local
, -1);
696 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
697 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
698 /* XXX: for AP_VLAN, actually track AP queues */
699 netif_tx_start_all_queues(dev
);
702 int n_acs
= IEEE80211_NUM_ACS
;
705 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
708 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
709 if (sdata
->vif
.cab_queue
== IEEE80211_INVAL_HW_QUEUE
||
710 (local
->queue_stop_reasons
[sdata
->vif
.cab_queue
] == 0 &&
711 skb_queue_empty(&local
->pending
[sdata
->vif
.cab_queue
]))) {
712 for (ac
= 0; ac
< n_acs
; ac
++) {
713 int ac_queue
= sdata
->vif
.hw_queue
[ac
];
715 if (local
->queue_stop_reasons
[ac_queue
] == 0 &&
716 skb_queue_empty(&local
->pending
[ac_queue
]))
717 netif_start_subqueue(dev
, ac
);
720 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
725 drv_remove_interface(local
, sdata
);
727 if (!local
->open_count
)
731 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
732 mutex_lock(&local
->mtx
);
733 list_del(&sdata
->u
.vlan
.list
);
734 mutex_unlock(&local
->mtx
);
736 /* might already be clear but that doesn't matter */
737 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
741 static int ieee80211_open(struct net_device
*dev
)
743 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
746 /* fail early if user set an invalid address */
747 if (!is_valid_ether_addr(dev
->dev_addr
))
748 return -EADDRNOTAVAIL
;
750 err
= ieee80211_check_concurrent_iface(sdata
, sdata
->vif
.type
);
754 return ieee80211_do_open(&sdata
->wdev
, true);
757 static void ieee80211_do_stop(struct ieee80211_sub_if_data
*sdata
,
760 struct ieee80211_local
*local
= sdata
->local
;
762 struct sk_buff
*skb
, *tmp
;
763 u32 hw_reconf_flags
= 0;
766 struct cfg80211_chan_def chandef
;
768 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
770 if (rcu_access_pointer(local
->scan_sdata
) == sdata
)
771 ieee80211_scan_cancel(local
);
774 * Stop TX on this interface first.
777 netif_tx_stop_all_queues(sdata
->dev
);
779 ieee80211_roc_purge(local
, sdata
);
781 switch (sdata
->vif
.type
) {
782 case NL80211_IFTYPE_STATION
:
783 ieee80211_mgd_stop(sdata
);
785 case NL80211_IFTYPE_ADHOC
:
786 ieee80211_ibss_stop(sdata
);
788 case NL80211_IFTYPE_AP
:
789 cancel_work_sync(&sdata
->u
.ap
.request_smps_work
);
796 * Remove all stations associated with this interface.
798 * This must be done before calling ops->remove_interface()
799 * because otherwise we can later invoke ops->sta_notify()
800 * whenever the STAs are removed, and that invalidates driver
801 * assumptions about always getting a vif pointer that is valid
802 * (because if we remove a STA after ops->remove_interface()
803 * the driver will have removed the vif info already!)
805 * This is relevant only in WDS mode, in all other modes we've
806 * already removed all stations when disconnecting or similar,
809 flushed
= sta_info_flush(sdata
);
810 WARN_ON_ONCE((sdata
->vif
.type
!= NL80211_IFTYPE_WDS
&& flushed
> 0) ||
811 (sdata
->vif
.type
== NL80211_IFTYPE_WDS
&& flushed
!= 1));
813 /* don't count this interface for promisc/allmulti while it is down */
814 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
815 atomic_dec(&local
->iff_allmultis
);
817 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
818 atomic_dec(&local
->iff_promiscs
);
820 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
822 local
->fif_probe_req
--;
823 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
824 local
->fif_probe_req
--;
828 netif_addr_lock_bh(sdata
->dev
);
829 spin_lock_bh(&local
->filter_lock
);
830 __hw_addr_unsync(&local
->mc_list
, &sdata
->dev
->mc
,
831 sdata
->dev
->addr_len
);
832 spin_unlock_bh(&local
->filter_lock
);
833 netif_addr_unlock_bh(sdata
->dev
);
836 del_timer_sync(&local
->dynamic_ps_timer
);
837 cancel_work_sync(&local
->dynamic_ps_enable_work
);
839 cancel_work_sync(&sdata
->recalc_smps
);
841 sdata
->vif
.csa_active
= false;
843 cancel_work_sync(&sdata
->csa_finalize_work
);
845 cancel_delayed_work_sync(&sdata
->dfs_cac_timer_work
);
847 if (sdata
->wdev
.cac_started
) {
848 chandef
= sdata
->vif
.bss_conf
.chandef
;
849 WARN_ON(local
->suspended
);
850 mutex_lock(&local
->mtx
);
851 ieee80211_vif_release_channel(sdata
);
852 mutex_unlock(&local
->mtx
);
853 cfg80211_cac_event(sdata
->dev
, &chandef
,
854 NL80211_RADAR_CAC_ABORTED
,
858 /* APs need special treatment */
859 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
860 struct ieee80211_sub_if_data
*vlan
, *tmpsdata
;
862 /* down all dependent devices, that is VLANs */
863 list_for_each_entry_safe(vlan
, tmpsdata
, &sdata
->u
.ap
.vlans
,
865 dev_close(vlan
->dev
);
866 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
867 } else if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
868 /* remove all packets in parent bc_buf pointing to this dev */
869 ps
= &sdata
->bss
->ps
;
871 spin_lock_irqsave(&ps
->bc_buf
.lock
, flags
);
872 skb_queue_walk_safe(&ps
->bc_buf
, skb
, tmp
) {
873 if (skb
->dev
== sdata
->dev
) {
874 __skb_unlink(skb
, &ps
->bc_buf
);
875 local
->total_ps_buffered
--;
876 ieee80211_free_txskb(&local
->hw
, skb
);
879 spin_unlock_irqrestore(&ps
->bc_buf
.lock
, flags
);
885 switch (sdata
->vif
.type
) {
886 case NL80211_IFTYPE_AP_VLAN
:
887 mutex_lock(&local
->mtx
);
888 list_del(&sdata
->u
.vlan
.list
);
889 mutex_unlock(&local
->mtx
);
890 RCU_INIT_POINTER(sdata
->vif
.chanctx_conf
, NULL
);
891 /* no need to tell driver */
893 case NL80211_IFTYPE_MONITOR
:
894 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
895 local
->cooked_mntrs
--;
900 if (local
->monitors
== 0) {
901 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_MONITOR
;
902 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
905 ieee80211_adjust_monitor_flags(sdata
, -1);
907 case NL80211_IFTYPE_P2P_DEVICE
:
908 /* relies on synchronize_rcu() below */
909 RCU_INIT_POINTER(local
->p2p_sdata
, NULL
);
912 cancel_work_sync(&sdata
->work
);
914 * When we get here, the interface is marked down.
915 * Free the remaining keys, if there are any
916 * (shouldn't be, except maybe in WDS mode?)
918 * Force the key freeing to always synchronize_net()
919 * to wait for the RX path in case it is using this
920 * interface enqueuing frames * at this very time on
923 ieee80211_free_keys(sdata
, true);
926 case NL80211_IFTYPE_AP
:
927 skb_queue_purge(&sdata
->skb_queue
);
932 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
933 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
934 skb_queue_walk_safe(&local
->pending
[i
], skb
, tmp
) {
935 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
936 if (info
->control
.vif
== &sdata
->vif
) {
937 __skb_unlink(skb
, &local
->pending
[i
]);
938 ieee80211_free_txskb(&local
->hw
, skb
);
942 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
944 if (local
->open_count
== 0)
945 ieee80211_clear_tx_pending(local
);
948 * If the interface goes down while suspended, presumably because
949 * the device was unplugged and that happens before our resume,
950 * then the driver is already unconfigured and the remainder of
951 * this function isn't needed.
952 * XXX: what about WoWLAN? If the device has software state, e.g.
953 * memory allocated, it might expect teardown commands from
956 if (local
->suspended
) {
957 WARN_ON(local
->wowlan
);
958 WARN_ON(rtnl_dereference(local
->monitor_sdata
));
962 switch (sdata
->vif
.type
) {
963 case NL80211_IFTYPE_AP_VLAN
:
965 case NL80211_IFTYPE_MONITOR
:
966 if (local
->monitors
== 0)
967 ieee80211_del_virtual_monitor(local
);
969 mutex_lock(&local
->mtx
);
970 ieee80211_recalc_idle(local
);
971 mutex_unlock(&local
->mtx
);
973 if (!(sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
))
979 drv_remove_interface(local
, sdata
);
982 ieee80211_recalc_ps(local
, -1);
984 if (local
->open_count
== 0) {
985 ieee80211_stop_device(local
);
987 /* no reconfiguring after stop! */
991 /* do after stop to avoid reconfiguring when we stop anyway */
992 ieee80211_configure_filter(local
);
993 ieee80211_hw_config(local
, hw_reconf_flags
);
995 if (local
->monitors
== local
->open_count
)
996 ieee80211_add_virtual_monitor(local
);
999 static int ieee80211_stop(struct net_device
*dev
)
1001 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1003 ieee80211_do_stop(sdata
, true);
1008 static void ieee80211_set_multicast_list(struct net_device
*dev
)
1010 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1011 struct ieee80211_local
*local
= sdata
->local
;
1012 int allmulti
, promisc
, sdata_allmulti
, sdata_promisc
;
1014 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
1015 promisc
= !!(dev
->flags
& IFF_PROMISC
);
1016 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
1017 sdata_promisc
= !!(sdata
->flags
& IEEE80211_SDATA_PROMISC
);
1019 if (allmulti
!= sdata_allmulti
) {
1020 if (dev
->flags
& IFF_ALLMULTI
)
1021 atomic_inc(&local
->iff_allmultis
);
1023 atomic_dec(&local
->iff_allmultis
);
1024 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
1027 if (promisc
!= sdata_promisc
) {
1028 if (dev
->flags
& IFF_PROMISC
)
1029 atomic_inc(&local
->iff_promiscs
);
1031 atomic_dec(&local
->iff_promiscs
);
1032 sdata
->flags
^= IEEE80211_SDATA_PROMISC
;
1034 spin_lock_bh(&local
->filter_lock
);
1035 __hw_addr_sync(&local
->mc_list
, &dev
->mc
, dev
->addr_len
);
1036 spin_unlock_bh(&local
->filter_lock
);
1037 ieee80211_queue_work(&local
->hw
, &local
->reconfig_filter
);
1041 * Called when the netdev is removed or, by the code below, before
1042 * the interface type changes.
1044 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data
*sdata
)
1048 /* free extra data */
1049 ieee80211_free_keys(sdata
, false);
1051 ieee80211_debugfs_remove_netdev(sdata
);
1053 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
1054 __skb_queue_purge(&sdata
->fragments
[i
].skb_list
);
1055 sdata
->fragment_next
= 0;
1057 if (ieee80211_vif_is_mesh(&sdata
->vif
))
1058 mesh_rmc_free(sdata
);
1061 static void ieee80211_uninit(struct net_device
*dev
)
1063 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev
));
1066 static u16
ieee80211_netdev_select_queue(struct net_device
*dev
,
1067 struct sk_buff
*skb
,
1069 select_queue_fallback_t fallback
)
1071 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev
), skb
);
1074 static const struct net_device_ops ieee80211_dataif_ops
= {
1075 .ndo_open
= ieee80211_open
,
1076 .ndo_stop
= ieee80211_stop
,
1077 .ndo_uninit
= ieee80211_uninit
,
1078 .ndo_start_xmit
= ieee80211_subif_start_xmit
,
1079 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
1080 .ndo_change_mtu
= ieee80211_change_mtu
,
1081 .ndo_set_mac_address
= ieee80211_change_mac
,
1082 .ndo_select_queue
= ieee80211_netdev_select_queue
,
1085 static u16
ieee80211_monitor_select_queue(struct net_device
*dev
,
1086 struct sk_buff
*skb
,
1088 select_queue_fallback_t fallback
)
1090 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1091 struct ieee80211_local
*local
= sdata
->local
;
1092 struct ieee80211_hdr
*hdr
;
1093 struct ieee80211_radiotap_header
*rtap
= (void *)skb
->data
;
1095 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1099 skb
->len
< le16_to_cpu(rtap
->it_len
) + 2 /* frame control */)
1100 return 0; /* doesn't matter, frame will be dropped */
1102 hdr
= (void *)((u8
*)skb
->data
+ le16_to_cpu(rtap
->it_len
));
1104 return ieee80211_select_queue_80211(sdata
, skb
, hdr
);
1107 static const struct net_device_ops ieee80211_monitorif_ops
= {
1108 .ndo_open
= ieee80211_open
,
1109 .ndo_stop
= ieee80211_stop
,
1110 .ndo_uninit
= ieee80211_uninit
,
1111 .ndo_start_xmit
= ieee80211_monitor_start_xmit
,
1112 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
1113 .ndo_change_mtu
= ieee80211_change_mtu
,
1114 .ndo_set_mac_address
= ieee80211_change_mac
,
1115 .ndo_select_queue
= ieee80211_monitor_select_queue
,
1118 static void ieee80211_if_setup(struct net_device
*dev
)
1121 dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1122 dev
->netdev_ops
= &ieee80211_dataif_ops
;
1123 dev
->destructor
= free_netdev
;
1126 static void ieee80211_iface_work(struct work_struct
*work
)
1128 struct ieee80211_sub_if_data
*sdata
=
1129 container_of(work
, struct ieee80211_sub_if_data
, work
);
1130 struct ieee80211_local
*local
= sdata
->local
;
1131 struct sk_buff
*skb
;
1132 struct sta_info
*sta
;
1133 struct ieee80211_ra_tid
*ra_tid
;
1135 if (!ieee80211_sdata_running(sdata
))
1138 if (local
->scanning
)
1142 * ieee80211_queue_work() should have picked up most cases,
1143 * here we'll pick the rest.
1145 if (WARN(local
->suspended
,
1146 "interface work scheduled while going to suspend\n"))
1149 /* first process frames */
1150 while ((skb
= skb_dequeue(&sdata
->skb_queue
))) {
1151 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
1153 if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_START
) {
1154 ra_tid
= (void *)&skb
->cb
;
1155 ieee80211_start_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
1157 } else if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_STOP
) {
1158 ra_tid
= (void *)&skb
->cb
;
1159 ieee80211_stop_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
1161 } else if (ieee80211_is_action(mgmt
->frame_control
) &&
1162 mgmt
->u
.action
.category
== WLAN_CATEGORY_BACK
) {
1165 mutex_lock(&local
->sta_mtx
);
1166 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
1168 switch (mgmt
->u
.action
.u
.addba_req
.action_code
) {
1169 case WLAN_ACTION_ADDBA_REQ
:
1170 ieee80211_process_addba_request(
1171 local
, sta
, mgmt
, len
);
1173 case WLAN_ACTION_ADDBA_RESP
:
1174 ieee80211_process_addba_resp(local
, sta
,
1177 case WLAN_ACTION_DELBA
:
1178 ieee80211_process_delba(sdata
, sta
,
1186 mutex_unlock(&local
->sta_mtx
);
1187 } else if (ieee80211_is_data_qos(mgmt
->frame_control
)) {
1188 struct ieee80211_hdr
*hdr
= (void *)mgmt
;
1190 * So the frame isn't mgmt, but frame_control
1191 * is at the right place anyway, of course, so
1192 * the if statement is correct.
1194 * Warn if we have other data frame types here,
1195 * they must not get here.
1197 WARN_ON(hdr
->frame_control
&
1198 cpu_to_le16(IEEE80211_STYPE_NULLFUNC
));
1199 WARN_ON(!(hdr
->seq_ctrl
&
1200 cpu_to_le16(IEEE80211_SCTL_FRAG
)));
1202 * This was a fragment of a frame, received while
1203 * a block-ack session was active. That cannot be
1204 * right, so terminate the session.
1206 mutex_lock(&local
->sta_mtx
);
1207 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
1209 u16 tid
= *ieee80211_get_qos_ctl(hdr
) &
1210 IEEE80211_QOS_CTL_TID_MASK
;
1212 __ieee80211_stop_rx_ba_session(
1213 sta
, tid
, WLAN_BACK_RECIPIENT
,
1214 WLAN_REASON_QSTA_REQUIRE_SETUP
,
1217 mutex_unlock(&local
->sta_mtx
);
1218 } else switch (sdata
->vif
.type
) {
1219 case NL80211_IFTYPE_STATION
:
1220 ieee80211_sta_rx_queued_mgmt(sdata
, skb
);
1222 case NL80211_IFTYPE_ADHOC
:
1223 ieee80211_ibss_rx_queued_mgmt(sdata
, skb
);
1225 case NL80211_IFTYPE_MESH_POINT
:
1226 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
1228 ieee80211_mesh_rx_queued_mgmt(sdata
, skb
);
1231 WARN(1, "frame for unexpected interface type");
1238 /* then other type-dependent work */
1239 switch (sdata
->vif
.type
) {
1240 case NL80211_IFTYPE_STATION
:
1241 ieee80211_sta_work(sdata
);
1243 case NL80211_IFTYPE_ADHOC
:
1244 ieee80211_ibss_work(sdata
);
1246 case NL80211_IFTYPE_MESH_POINT
:
1247 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
1249 ieee80211_mesh_work(sdata
);
1256 static void ieee80211_recalc_smps_work(struct work_struct
*work
)
1258 struct ieee80211_sub_if_data
*sdata
=
1259 container_of(work
, struct ieee80211_sub_if_data
, recalc_smps
);
1261 ieee80211_recalc_smps(sdata
);
1265 * Helper function to initialise an interface to a specific type.
1267 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data
*sdata
,
1268 enum nl80211_iftype type
)
1270 /* clear type-dependent union */
1271 memset(&sdata
->u
, 0, sizeof(sdata
->u
));
1273 /* and set some type-dependent values */
1274 sdata
->vif
.type
= type
;
1275 sdata
->vif
.p2p
= false;
1276 sdata
->wdev
.iftype
= type
;
1278 sdata
->control_port_protocol
= cpu_to_be16(ETH_P_PAE
);
1279 sdata
->control_port_no_encrypt
= false;
1280 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
1282 sdata
->noack_map
= 0;
1284 /* only monitor/p2p-device differ */
1286 sdata
->dev
->netdev_ops
= &ieee80211_dataif_ops
;
1287 sdata
->dev
->type
= ARPHRD_ETHER
;
1290 skb_queue_head_init(&sdata
->skb_queue
);
1291 INIT_WORK(&sdata
->work
, ieee80211_iface_work
);
1292 INIT_WORK(&sdata
->recalc_smps
, ieee80211_recalc_smps_work
);
1293 INIT_WORK(&sdata
->csa_finalize_work
, ieee80211_csa_finalize_work
);
1294 INIT_LIST_HEAD(&sdata
->assigned_chanctx_list
);
1295 INIT_LIST_HEAD(&sdata
->reserved_chanctx_list
);
1298 case NL80211_IFTYPE_P2P_GO
:
1299 type
= NL80211_IFTYPE_AP
;
1300 sdata
->vif
.type
= type
;
1301 sdata
->vif
.p2p
= true;
1303 case NL80211_IFTYPE_AP
:
1304 skb_queue_head_init(&sdata
->u
.ap
.ps
.bc_buf
);
1305 INIT_LIST_HEAD(&sdata
->u
.ap
.vlans
);
1306 INIT_WORK(&sdata
->u
.ap
.request_smps_work
,
1307 ieee80211_request_smps_ap_work
);
1308 sdata
->vif
.bss_conf
.bssid
= sdata
->vif
.addr
;
1309 sdata
->u
.ap
.req_smps
= IEEE80211_SMPS_OFF
;
1311 case NL80211_IFTYPE_P2P_CLIENT
:
1312 type
= NL80211_IFTYPE_STATION
;
1313 sdata
->vif
.type
= type
;
1314 sdata
->vif
.p2p
= true;
1316 case NL80211_IFTYPE_STATION
:
1317 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.mgd
.bssid
;
1318 ieee80211_sta_setup_sdata(sdata
);
1320 case NL80211_IFTYPE_ADHOC
:
1321 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.ibss
.bssid
;
1322 ieee80211_ibss_setup_sdata(sdata
);
1324 case NL80211_IFTYPE_MESH_POINT
:
1325 if (ieee80211_vif_is_mesh(&sdata
->vif
))
1326 ieee80211_mesh_init_sdata(sdata
);
1328 case NL80211_IFTYPE_MONITOR
:
1329 sdata
->dev
->type
= ARPHRD_IEEE80211_RADIOTAP
;
1330 sdata
->dev
->netdev_ops
= &ieee80211_monitorif_ops
;
1331 sdata
->u
.mntr_flags
= MONITOR_FLAG_CONTROL
|
1332 MONITOR_FLAG_OTHER_BSS
;
1334 case NL80211_IFTYPE_WDS
:
1335 sdata
->vif
.bss_conf
.bssid
= NULL
;
1337 case NL80211_IFTYPE_AP_VLAN
:
1338 case NL80211_IFTYPE_P2P_DEVICE
:
1339 sdata
->vif
.bss_conf
.bssid
= sdata
->vif
.addr
;
1341 case NL80211_IFTYPE_UNSPECIFIED
:
1342 case NUM_NL80211_IFTYPES
:
1347 ieee80211_debugfs_add_netdev(sdata
);
1350 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data
*sdata
,
1351 enum nl80211_iftype type
)
1353 struct ieee80211_local
*local
= sdata
->local
;
1355 enum nl80211_iftype internal_type
= type
;
1360 if (!local
->ops
->change_interface
)
1363 switch (sdata
->vif
.type
) {
1364 case NL80211_IFTYPE_AP
:
1365 case NL80211_IFTYPE_STATION
:
1366 case NL80211_IFTYPE_ADHOC
:
1368 * Could maybe also all others here?
1369 * Just not sure how that interacts
1370 * with the RX/config path e.g. for
1379 case NL80211_IFTYPE_AP
:
1380 case NL80211_IFTYPE_STATION
:
1381 case NL80211_IFTYPE_ADHOC
:
1383 * Could probably support everything
1384 * but WDS here (WDS do_open can fail
1385 * under memory pressure, which this
1386 * code isn't prepared to handle).
1389 case NL80211_IFTYPE_P2P_CLIENT
:
1391 internal_type
= NL80211_IFTYPE_STATION
;
1393 case NL80211_IFTYPE_P2P_GO
:
1395 internal_type
= NL80211_IFTYPE_AP
;
1401 ret
= ieee80211_check_concurrent_iface(sdata
, internal_type
);
1405 ieee80211_do_stop(sdata
, false);
1407 ieee80211_teardown_sdata(sdata
);
1409 ret
= drv_change_interface(local
, sdata
, internal_type
, p2p
);
1411 type
= ieee80211_vif_type_p2p(&sdata
->vif
);
1414 * Ignore return value here, there's not much we can do since
1415 * the driver changed the interface type internally already.
1416 * The warnings will hopefully make driver authors fix it :-)
1418 ieee80211_check_queues(sdata
, type
);
1420 ieee80211_setup_sdata(sdata
, type
);
1422 err
= ieee80211_do_open(&sdata
->wdev
, false);
1423 WARN(err
, "type change: do_open returned %d", err
);
1428 int ieee80211_if_change_type(struct ieee80211_sub_if_data
*sdata
,
1429 enum nl80211_iftype type
)
1435 if (type
== ieee80211_vif_type_p2p(&sdata
->vif
))
1438 if (ieee80211_sdata_running(sdata
)) {
1439 ret
= ieee80211_runtime_change_iftype(sdata
, type
);
1443 /* Purge and reset type-dependent state. */
1444 ieee80211_teardown_sdata(sdata
);
1445 ieee80211_setup_sdata(sdata
, type
);
1448 /* reset some values that shouldn't be kept across type changes */
1449 sdata
->drop_unencrypted
= 0;
1450 if (type
== NL80211_IFTYPE_STATION
)
1451 sdata
->u
.mgd
.use_4addr
= false;
1456 static void ieee80211_assign_perm_addr(struct ieee80211_local
*local
,
1457 u8
*perm_addr
, enum nl80211_iftype type
)
1459 struct ieee80211_sub_if_data
*sdata
;
1460 u64 mask
, start
, addr
, val
, inc
;
1462 u8 tmp_addr
[ETH_ALEN
];
1465 /* default ... something at least */
1466 memcpy(perm_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
1468 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
) &&
1469 local
->hw
.wiphy
->n_addresses
<= 1)
1472 mutex_lock(&local
->iflist_mtx
);
1475 case NL80211_IFTYPE_MONITOR
:
1476 /* doesn't matter */
1478 case NL80211_IFTYPE_WDS
:
1479 case NL80211_IFTYPE_AP_VLAN
:
1480 /* match up with an AP interface */
1481 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1482 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
1484 memcpy(perm_addr
, sdata
->vif
.addr
, ETH_ALEN
);
1487 /* keep default if no AP interface present */
1489 case NL80211_IFTYPE_P2P_CLIENT
:
1490 case NL80211_IFTYPE_P2P_GO
:
1491 if (local
->hw
.flags
& IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF
) {
1492 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1493 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
)
1495 if (!ieee80211_sdata_running(sdata
))
1497 memcpy(perm_addr
, sdata
->vif
.addr
, ETH_ALEN
);
1501 /* otherwise fall through */
1503 /* assign a new address if possible -- try n_addresses first */
1504 for (i
= 0; i
< local
->hw
.wiphy
->n_addresses
; i
++) {
1507 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1508 if (ether_addr_equal(local
->hw
.wiphy
->addresses
[i
].addr
,
1517 local
->hw
.wiphy
->addresses
[i
].addr
,
1523 /* try mask if available */
1524 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
))
1527 m
= local
->hw
.wiphy
->addr_mask
;
1528 mask
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1529 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1530 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1532 if (__ffs64(mask
) + hweight64(mask
) != fls64(mask
)) {
1533 /* not a contiguous mask ... not handled now! */
1534 pr_info("not contiguous\n");
1539 * Pick address of existing interface in case user changed
1540 * MAC address manually, default to perm_addr.
1542 m
= local
->hw
.wiphy
->perm_addr
;
1543 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1544 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
)
1546 m
= sdata
->vif
.addr
;
1549 start
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1550 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1551 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1553 inc
= 1ULL<<__ffs64(mask
);
1554 val
= (start
& mask
);
1555 addr
= (start
& ~mask
) | (val
& mask
);
1559 tmp_addr
[5] = addr
>> 0*8;
1560 tmp_addr
[4] = addr
>> 1*8;
1561 tmp_addr
[3] = addr
>> 2*8;
1562 tmp_addr
[2] = addr
>> 3*8;
1563 tmp_addr
[1] = addr
>> 4*8;
1564 tmp_addr
[0] = addr
>> 5*8;
1568 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1569 if (ether_addr_equal(tmp_addr
, sdata
->vif
.addr
)) {
1576 memcpy(perm_addr
, tmp_addr
, ETH_ALEN
);
1579 addr
= (start
& ~mask
) | (val
& mask
);
1580 } while (addr
!= start
);
1586 mutex_unlock(&local
->iflist_mtx
);
1589 int ieee80211_if_add(struct ieee80211_local
*local
, const char *name
,
1590 struct wireless_dev
**new_wdev
, enum nl80211_iftype type
,
1591 struct vif_params
*params
)
1593 struct net_device
*ndev
= NULL
;
1594 struct ieee80211_sub_if_data
*sdata
= NULL
;
1600 if (type
== NL80211_IFTYPE_P2P_DEVICE
) {
1601 struct wireless_dev
*wdev
;
1603 sdata
= kzalloc(sizeof(*sdata
) + local
->hw
.vif_data_size
,
1607 wdev
= &sdata
->wdev
;
1610 strlcpy(sdata
->name
, name
, IFNAMSIZ
);
1611 ieee80211_assign_perm_addr(local
, wdev
->address
, type
);
1612 memcpy(sdata
->vif
.addr
, wdev
->address
, ETH_ALEN
);
1614 if (local
->hw
.queues
>= IEEE80211_NUM_ACS
)
1615 txqs
= IEEE80211_NUM_ACS
;
1617 ndev
= alloc_netdev_mqs(sizeof(*sdata
) +
1618 local
->hw
.vif_data_size
,
1619 name
, ieee80211_if_setup
, txqs
, 1);
1622 dev_net_set(ndev
, wiphy_net(local
->hw
.wiphy
));
1624 ndev
->needed_headroom
= local
->tx_headroom
+
1625 4*6 /* four MAC addresses */
1626 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1628 + 8 /* rfc1042/bridge tunnel */
1629 - ETH_HLEN
/* ethernet hard_header_len */
1630 + IEEE80211_ENCRYPT_HEADROOM
;
1631 ndev
->needed_tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
1633 ret
= dev_alloc_name(ndev
, ndev
->name
);
1639 ieee80211_assign_perm_addr(local
, ndev
->perm_addr
, type
);
1640 memcpy(ndev
->dev_addr
, ndev
->perm_addr
, ETH_ALEN
);
1641 SET_NETDEV_DEV(ndev
, wiphy_dev(local
->hw
.wiphy
));
1643 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1644 sdata
= netdev_priv(ndev
);
1645 ndev
->ieee80211_ptr
= &sdata
->wdev
;
1646 memcpy(sdata
->vif
.addr
, ndev
->dev_addr
, ETH_ALEN
);
1647 memcpy(sdata
->name
, ndev
->name
, IFNAMSIZ
);
1652 /* initialise type-independent data */
1653 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
1654 sdata
->local
= local
;
1656 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
1657 skb_queue_head_init(&sdata
->fragments
[i
].skb_list
);
1659 INIT_LIST_HEAD(&sdata
->key_list
);
1661 INIT_DELAYED_WORK(&sdata
->dfs_cac_timer_work
,
1662 ieee80211_dfs_cac_timer_work
);
1663 INIT_DELAYED_WORK(&sdata
->dec_tailroom_needed_wk
,
1664 ieee80211_delayed_tailroom_dec
);
1666 for (i
= 0; i
< IEEE80211_NUM_BANDS
; i
++) {
1667 struct ieee80211_supported_band
*sband
;
1668 sband
= local
->hw
.wiphy
->bands
[i
];
1669 sdata
->rc_rateidx_mask
[i
] =
1670 sband
? (1 << sband
->n_bitrates
) - 1 : 0;
1672 memcpy(sdata
->rc_rateidx_mcs_mask
[i
],
1673 sband
->ht_cap
.mcs
.rx_mask
,
1674 sizeof(sdata
->rc_rateidx_mcs_mask
[i
]));
1676 memset(sdata
->rc_rateidx_mcs_mask
[i
], 0,
1677 sizeof(sdata
->rc_rateidx_mcs_mask
[i
]));
1680 ieee80211_set_default_queues(sdata
);
1682 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
1683 sdata
->user_power_level
= local
->user_power_level
;
1685 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
1687 /* setup type-dependent data */
1688 ieee80211_setup_sdata(sdata
, type
);
1692 ndev
->ieee80211_ptr
->use_4addr
= params
->use_4addr
;
1693 if (type
== NL80211_IFTYPE_STATION
)
1694 sdata
->u
.mgd
.use_4addr
= params
->use_4addr
;
1697 ndev
->features
|= local
->hw
.netdev_features
;
1699 ret
= register_netdevice(ndev
);
1706 mutex_lock(&local
->iflist_mtx
);
1707 list_add_tail_rcu(&sdata
->list
, &local
->interfaces
);
1708 mutex_unlock(&local
->iflist_mtx
);
1711 *new_wdev
= &sdata
->wdev
;
1716 void ieee80211_if_remove(struct ieee80211_sub_if_data
*sdata
)
1720 mutex_lock(&sdata
->local
->iflist_mtx
);
1721 list_del_rcu(&sdata
->list
);
1722 mutex_unlock(&sdata
->local
->iflist_mtx
);
1727 unregister_netdevice(sdata
->dev
);
1729 cfg80211_unregister_wdev(&sdata
->wdev
);
1734 void ieee80211_sdata_stop(struct ieee80211_sub_if_data
*sdata
)
1736 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING
, &sdata
->state
)))
1738 ieee80211_do_stop(sdata
, true);
1739 ieee80211_teardown_sdata(sdata
);
1743 * Remove all interfaces, may only be called at hardware unregistration
1744 * time because it doesn't do RCU-safe list removals.
1746 void ieee80211_remove_interfaces(struct ieee80211_local
*local
)
1748 struct ieee80211_sub_if_data
*sdata
, *tmp
;
1749 LIST_HEAD(unreg_list
);
1750 LIST_HEAD(wdev_list
);
1755 * Close all AP_VLAN interfaces first, as otherwise they
1756 * might be closed while the AP interface they belong to
1757 * is closed, causing unregister_netdevice_many() to crash.
1759 list_for_each_entry(sdata
, &local
->interfaces
, list
)
1760 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
1761 dev_close(sdata
->dev
);
1763 mutex_lock(&local
->iflist_mtx
);
1764 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
1765 list_del(&sdata
->list
);
1768 unregister_netdevice_queue(sdata
->dev
, &unreg_list
);
1770 list_add(&sdata
->list
, &wdev_list
);
1772 mutex_unlock(&local
->iflist_mtx
);
1773 unregister_netdevice_many(&unreg_list
);
1774 list_del(&unreg_list
);
1776 list_for_each_entry_safe(sdata
, tmp
, &wdev_list
, list
) {
1777 list_del(&sdata
->list
);
1778 cfg80211_unregister_wdev(&sdata
->wdev
);
1783 static int netdev_notify(struct notifier_block
*nb
,
1784 unsigned long state
, void *ptr
)
1786 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
1787 struct ieee80211_sub_if_data
*sdata
;
1789 if (state
!= NETDEV_CHANGENAME
)
1792 if (!dev
->ieee80211_ptr
|| !dev
->ieee80211_ptr
->wiphy
)
1795 if (dev
->ieee80211_ptr
->wiphy
->privid
!= mac80211_wiphy_privid
)
1798 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1799 memcpy(sdata
->name
, dev
->name
, IFNAMSIZ
);
1800 ieee80211_debugfs_rename_netdev(sdata
);
1805 static struct notifier_block mac80211_netdev_notifier
= {
1806 .notifier_call
= netdev_notify
,
1809 int ieee80211_iface_init(void)
1811 return register_netdevice_notifier(&mac80211_netdev_notifier
);
1814 void ieee80211_iface_exit(void)
1816 unregister_netdevice_notifier(&mac80211_netdev_notifier
);