4 * Copyright 2002-2005, Instant802 Networks, Inc.
5 * Copyright 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
8 * Copyright 2013-2014 Intel Mobile Communications GmbH
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
14 #include <linux/slab.h>
15 #include <linux/kernel.h>
16 #include <linux/if_arp.h>
17 #include <linux/netdevice.h>
18 #include <linux/rtnetlink.h>
19 #include <net/mac80211.h>
20 #include <net/ieee80211_radiotap.h>
21 #include "ieee80211_i.h"
23 #include "debugfs_netdev.h"
26 #include "driver-ops.h"
31 * DOC: Interface list locking
33 * The interface list in each struct ieee80211_local is protected
36 * (1) modifications may only be done under the RTNL
37 * (2) modifications and readers are protected against each other by
39 * (3) modifications are done in an RCU manner so atomic readers
40 * can traverse the list in RCU-safe blocks.
42 * As a consequence, reads (traversals) of the list can be protected
43 * by either the RTNL, the iflist_mtx or RCU.
46 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data
*sdata
)
48 struct ieee80211_chanctx_conf
*chanctx_conf
;
52 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
58 power
= ieee80211_chandef_max_power(&chanctx_conf
->def
);
61 if (sdata
->user_power_level
!= IEEE80211_UNSET_POWER_LEVEL
)
62 power
= min(power
, sdata
->user_power_level
);
64 if (sdata
->ap_power_level
!= IEEE80211_UNSET_POWER_LEVEL
)
65 power
= min(power
, sdata
->ap_power_level
);
67 if (power
!= sdata
->vif
.bss_conf
.txpower
) {
68 sdata
->vif
.bss_conf
.txpower
= power
;
69 ieee80211_hw_config(sdata
->local
, 0);
76 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data
*sdata
,
79 if (__ieee80211_recalc_txpower(sdata
) ||
80 (update_bss
&& ieee80211_sdata_running(sdata
)))
81 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_TXPOWER
);
84 static u32
__ieee80211_idle_off(struct ieee80211_local
*local
)
86 if (!(local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
))
89 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_IDLE
;
90 return IEEE80211_CONF_CHANGE_IDLE
;
93 static u32
__ieee80211_idle_on(struct ieee80211_local
*local
)
95 if (local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
)
98 ieee80211_flush_queues(local
, NULL
, false);
100 local
->hw
.conf
.flags
|= IEEE80211_CONF_IDLE
;
101 return IEEE80211_CONF_CHANGE_IDLE
;
104 static u32
__ieee80211_recalc_idle(struct ieee80211_local
*local
,
107 bool working
, scanning
, active
;
108 unsigned int led_trig_start
= 0, led_trig_stop
= 0;
110 lockdep_assert_held(&local
->mtx
);
112 active
= force_active
||
113 !list_empty(&local
->chanctx_list
) ||
116 working
= !local
->ops
->remain_on_channel
&&
117 !list_empty(&local
->roc_list
);
119 scanning
= test_bit(SCAN_SW_SCANNING
, &local
->scanning
) ||
120 test_bit(SCAN_ONCHANNEL_SCANNING
, &local
->scanning
);
122 if (working
|| scanning
)
123 led_trig_start
|= IEEE80211_TPT_LEDTRIG_FL_WORK
;
125 led_trig_stop
|= IEEE80211_TPT_LEDTRIG_FL_WORK
;
128 led_trig_start
|= IEEE80211_TPT_LEDTRIG_FL_CONNECTED
;
130 led_trig_stop
|= IEEE80211_TPT_LEDTRIG_FL_CONNECTED
;
132 ieee80211_mod_tpt_led_trig(local
, led_trig_start
, led_trig_stop
);
134 if (working
|| scanning
|| active
)
135 return __ieee80211_idle_off(local
);
136 return __ieee80211_idle_on(local
);
139 u32
ieee80211_idle_off(struct ieee80211_local
*local
)
141 return __ieee80211_recalc_idle(local
, true);
144 void ieee80211_recalc_idle(struct ieee80211_local
*local
)
146 u32 change
= __ieee80211_recalc_idle(local
, false);
148 ieee80211_hw_config(local
, change
);
151 static int ieee80211_change_mtu(struct net_device
*dev
, int new_mtu
)
153 if (new_mtu
< 256 || new_mtu
> IEEE80211_MAX_DATA_LEN
)
160 static int ieee80211_verify_mac(struct ieee80211_sub_if_data
*sdata
, u8
*addr
,
163 struct ieee80211_local
*local
= sdata
->local
;
164 struct ieee80211_sub_if_data
*iter
;
169 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
))
173 new = ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
174 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
175 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
177 m
= local
->hw
.wiphy
->addr_mask
;
178 mask
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
179 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
180 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
185 mutex_lock(&local
->iflist_mtx
);
186 list_for_each_entry(iter
, &local
->interfaces
, list
) {
190 if (iter
->vif
.type
== NL80211_IFTYPE_MONITOR
&&
191 !(iter
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
))
195 tmp
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
196 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
197 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
199 if ((new & ~mask
) != (tmp
& ~mask
)) {
204 mutex_unlock(&local
->iflist_mtx
);
209 static int ieee80211_change_mac(struct net_device
*dev
, void *addr
)
211 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
212 struct sockaddr
*sa
= addr
;
213 bool check_dup
= true;
216 if (ieee80211_sdata_running(sdata
))
219 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
&&
220 !(sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
))
223 ret
= ieee80211_verify_mac(sdata
, sa
->sa_data
, check_dup
);
227 ret
= eth_mac_addr(dev
, sa
);
230 memcpy(sdata
->vif
.addr
, sa
->sa_data
, ETH_ALEN
);
235 static inline int identical_mac_addr_allowed(int type1
, int type2
)
237 return type1
== NL80211_IFTYPE_MONITOR
||
238 type2
== NL80211_IFTYPE_MONITOR
||
239 type1
== NL80211_IFTYPE_P2P_DEVICE
||
240 type2
== NL80211_IFTYPE_P2P_DEVICE
||
241 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_WDS
) ||
242 (type1
== NL80211_IFTYPE_WDS
&&
243 (type2
== NL80211_IFTYPE_WDS
||
244 type2
== NL80211_IFTYPE_AP
)) ||
245 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_AP_VLAN
) ||
246 (type1
== NL80211_IFTYPE_AP_VLAN
&&
247 (type2
== NL80211_IFTYPE_AP
||
248 type2
== NL80211_IFTYPE_AP_VLAN
));
251 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data
*sdata
,
252 enum nl80211_iftype iftype
)
254 struct ieee80211_local
*local
= sdata
->local
;
255 struct ieee80211_sub_if_data
*nsdata
;
260 /* we hold the RTNL here so can safely walk the list */
261 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
262 if (nsdata
!= sdata
&& ieee80211_sdata_running(nsdata
)) {
264 * Only OCB and monitor mode may coexist
266 if ((sdata
->vif
.type
== NL80211_IFTYPE_OCB
&&
267 nsdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
) ||
268 (sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
269 nsdata
->vif
.type
== NL80211_IFTYPE_OCB
))
273 * Allow only a single IBSS interface to be up at any
274 * time. This is restricted because beacon distribution
275 * cannot work properly if both are in the same IBSS.
277 * To remove this restriction we'd have to disallow them
278 * from setting the same SSID on different IBSS interfaces
279 * belonging to the same hardware. Then, however, we're
280 * faced with having to adopt two different TSF timers...
282 if (iftype
== NL80211_IFTYPE_ADHOC
&&
283 nsdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
286 * will not add another interface while any channel
289 if (nsdata
->vif
.csa_active
)
293 * The remaining checks are only performed for interfaces
294 * with the same MAC address.
296 if (!ether_addr_equal(sdata
->vif
.addr
,
301 * check whether it may have the same address
303 if (!identical_mac_addr_allowed(iftype
,
308 * can only add VLANs to enabled APs
310 if (iftype
== NL80211_IFTYPE_AP_VLAN
&&
311 nsdata
->vif
.type
== NL80211_IFTYPE_AP
)
312 sdata
->bss
= &nsdata
->u
.ap
;
316 mutex_lock(&local
->chanctx_mtx
);
317 ret
= ieee80211_check_combinations(sdata
, NULL
, 0, 0);
318 mutex_unlock(&local
->chanctx_mtx
);
322 static int ieee80211_check_queues(struct ieee80211_sub_if_data
*sdata
,
323 enum nl80211_iftype iftype
)
325 int n_queues
= sdata
->local
->hw
.queues
;
328 if (iftype
!= NL80211_IFTYPE_P2P_DEVICE
) {
329 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
330 if (WARN_ON_ONCE(sdata
->vif
.hw_queue
[i
] ==
331 IEEE80211_INVAL_HW_QUEUE
))
333 if (WARN_ON_ONCE(sdata
->vif
.hw_queue
[i
] >=
339 if ((iftype
!= NL80211_IFTYPE_AP
&&
340 iftype
!= NL80211_IFTYPE_P2P_GO
&&
341 iftype
!= NL80211_IFTYPE_MESH_POINT
) ||
342 !ieee80211_hw_check(&sdata
->local
->hw
, QUEUE_CONTROL
)) {
343 sdata
->vif
.cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
347 if (WARN_ON_ONCE(sdata
->vif
.cab_queue
== IEEE80211_INVAL_HW_QUEUE
))
350 if (WARN_ON_ONCE(sdata
->vif
.cab_queue
>= n_queues
))
356 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data
*sdata
,
359 struct ieee80211_local
*local
= sdata
->local
;
360 u32 flags
= sdata
->u
.mntr_flags
;
362 #define ADJUST(_f, _s) do { \
363 if (flags & MONITOR_FLAG_##_f) \
364 local->fif_##_s += offset; \
367 ADJUST(FCSFAIL
, fcsfail
);
368 ADJUST(PLCPFAIL
, plcpfail
);
369 ADJUST(CONTROL
, control
);
370 ADJUST(CONTROL
, pspoll
);
371 ADJUST(OTHER_BSS
, other_bss
);
376 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data
*sdata
)
378 struct ieee80211_local
*local
= sdata
->local
;
381 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
382 if (ieee80211_hw_check(&local
->hw
, QUEUE_CONTROL
))
383 sdata
->vif
.hw_queue
[i
] = IEEE80211_INVAL_HW_QUEUE
;
384 else if (local
->hw
.queues
>= IEEE80211_NUM_ACS
)
385 sdata
->vif
.hw_queue
[i
] = i
;
387 sdata
->vif
.hw_queue
[i
] = 0;
389 sdata
->vif
.cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
392 int ieee80211_add_virtual_monitor(struct ieee80211_local
*local
)
394 struct ieee80211_sub_if_data
*sdata
;
397 if (!ieee80211_hw_check(&local
->hw
, WANT_MONITOR_VIF
))
402 if (local
->monitor_sdata
)
405 sdata
= kzalloc(sizeof(*sdata
) + local
->hw
.vif_data_size
, GFP_KERNEL
);
410 sdata
->local
= local
;
411 sdata
->vif
.type
= NL80211_IFTYPE_MONITOR
;
412 snprintf(sdata
->name
, IFNAMSIZ
, "%s-monitor",
413 wiphy_name(local
->hw
.wiphy
));
414 sdata
->wdev
.iftype
= NL80211_IFTYPE_MONITOR
;
416 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
418 ieee80211_set_default_queues(sdata
);
420 ret
= drv_add_interface(local
, sdata
);
422 /* ok .. stupid driver, it asked for this! */
427 ret
= ieee80211_check_queues(sdata
, NL80211_IFTYPE_MONITOR
);
433 mutex_lock(&local
->iflist_mtx
);
434 rcu_assign_pointer(local
->monitor_sdata
, sdata
);
435 mutex_unlock(&local
->iflist_mtx
);
437 mutex_lock(&local
->mtx
);
438 ret
= ieee80211_vif_use_channel(sdata
, &local
->monitor_chandef
,
439 IEEE80211_CHANCTX_EXCLUSIVE
);
440 mutex_unlock(&local
->mtx
);
442 mutex_lock(&local
->iflist_mtx
);
443 RCU_INIT_POINTER(local
->monitor_sdata
, NULL
);
444 mutex_unlock(&local
->iflist_mtx
);
446 drv_remove_interface(local
, sdata
);
454 void ieee80211_del_virtual_monitor(struct ieee80211_local
*local
)
456 struct ieee80211_sub_if_data
*sdata
;
458 if (!ieee80211_hw_check(&local
->hw
, WANT_MONITOR_VIF
))
463 mutex_lock(&local
->iflist_mtx
);
465 sdata
= rcu_dereference_protected(local
->monitor_sdata
,
466 lockdep_is_held(&local
->iflist_mtx
));
468 mutex_unlock(&local
->iflist_mtx
);
472 RCU_INIT_POINTER(local
->monitor_sdata
, NULL
);
473 mutex_unlock(&local
->iflist_mtx
);
477 mutex_lock(&local
->mtx
);
478 ieee80211_vif_release_channel(sdata
);
479 mutex_unlock(&local
->mtx
);
481 drv_remove_interface(local
, sdata
);
487 * NOTE: Be very careful when changing this function, it must NOT return
488 * an error on interface type changes that have been pre-checked, so most
489 * checks should be in ieee80211_check_concurrent_iface.
491 int ieee80211_do_open(struct wireless_dev
*wdev
, bool coming_up
)
493 struct ieee80211_sub_if_data
*sdata
= IEEE80211_WDEV_TO_SUB_IF(wdev
);
494 struct net_device
*dev
= wdev
->netdev
;
495 struct ieee80211_local
*local
= sdata
->local
;
496 struct sta_info
*sta
;
499 u32 hw_reconf_flags
= 0;
501 switch (sdata
->vif
.type
) {
502 case NL80211_IFTYPE_WDS
:
503 if (!is_valid_ether_addr(sdata
->u
.wds
.remote_addr
))
506 case NL80211_IFTYPE_AP_VLAN
: {
507 struct ieee80211_sub_if_data
*master
;
512 mutex_lock(&local
->mtx
);
513 list_add(&sdata
->u
.vlan
.list
, &sdata
->bss
->vlans
);
514 mutex_unlock(&local
->mtx
);
516 master
= container_of(sdata
->bss
,
517 struct ieee80211_sub_if_data
, u
.ap
);
518 sdata
->control_port_protocol
=
519 master
->control_port_protocol
;
520 sdata
->control_port_no_encrypt
=
521 master
->control_port_no_encrypt
;
522 sdata
->vif
.cab_queue
= master
->vif
.cab_queue
;
523 memcpy(sdata
->vif
.hw_queue
, master
->vif
.hw_queue
,
524 sizeof(sdata
->vif
.hw_queue
));
525 sdata
->vif
.bss_conf
.chandef
= master
->vif
.bss_conf
.chandef
;
527 mutex_lock(&local
->key_mtx
);
528 sdata
->crypto_tx_tailroom_needed_cnt
+=
529 master
->crypto_tx_tailroom_needed_cnt
;
530 mutex_unlock(&local
->key_mtx
);
534 case NL80211_IFTYPE_AP
:
535 sdata
->bss
= &sdata
->u
.ap
;
537 case NL80211_IFTYPE_MESH_POINT
:
538 case NL80211_IFTYPE_STATION
:
539 case NL80211_IFTYPE_MONITOR
:
540 case NL80211_IFTYPE_ADHOC
:
541 case NL80211_IFTYPE_P2P_DEVICE
:
542 case NL80211_IFTYPE_OCB
:
543 /* no special treatment */
545 case NL80211_IFTYPE_UNSPECIFIED
:
546 case NUM_NL80211_IFTYPES
:
547 case NL80211_IFTYPE_P2P_CLIENT
:
548 case NL80211_IFTYPE_P2P_GO
:
554 if (local
->open_count
== 0) {
555 res
= drv_start(local
);
558 /* we're brought up, everything changes */
559 hw_reconf_flags
= ~0;
560 ieee80211_led_radio(local
, true);
561 ieee80211_mod_tpt_led_trig(local
,
562 IEEE80211_TPT_LEDTRIG_FL_RADIO
, 0);
566 * Copy the hopefully now-present MAC address to
567 * this interface, if it has the special null one.
569 if (dev
&& is_zero_ether_addr(dev
->dev_addr
)) {
570 memcpy(dev
->dev_addr
,
571 local
->hw
.wiphy
->perm_addr
,
573 memcpy(dev
->perm_addr
, dev
->dev_addr
, ETH_ALEN
);
575 if (!is_valid_ether_addr(dev
->dev_addr
)) {
576 res
= -EADDRNOTAVAIL
;
581 switch (sdata
->vif
.type
) {
582 case NL80211_IFTYPE_AP_VLAN
:
583 /* no need to tell driver, but set carrier and chanctx */
584 if (rtnl_dereference(sdata
->bss
->beacon
)) {
585 ieee80211_vif_vlan_copy_chanctx(sdata
);
586 netif_carrier_on(dev
);
588 netif_carrier_off(dev
);
591 case NL80211_IFTYPE_MONITOR
:
592 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
593 local
->cooked_mntrs
++;
597 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
) {
598 res
= drv_add_interface(local
, sdata
);
601 } else if (local
->monitors
== 0 && local
->open_count
== 0) {
602 res
= ieee80211_add_virtual_monitor(local
);
607 /* must be before the call to ieee80211_configure_filter */
609 if (local
->monitors
== 1) {
610 local
->hw
.conf
.flags
|= IEEE80211_CONF_MONITOR
;
611 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
614 ieee80211_adjust_monitor_flags(sdata
, 1);
615 ieee80211_configure_filter(local
);
616 mutex_lock(&local
->mtx
);
617 ieee80211_recalc_idle(local
);
618 mutex_unlock(&local
->mtx
);
620 netif_carrier_on(dev
);
624 ieee80211_del_virtual_monitor(local
);
626 res
= drv_add_interface(local
, sdata
);
629 res
= ieee80211_check_queues(sdata
,
630 ieee80211_vif_type_p2p(&sdata
->vif
));
632 goto err_del_interface
;
635 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
637 local
->fif_probe_req
++;
639 ieee80211_configure_filter(local
);
640 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
641 local
->fif_probe_req
++;
644 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
)
645 changed
|= ieee80211_reset_erp_info(sdata
);
646 ieee80211_bss_info_change_notify(sdata
, changed
);
648 switch (sdata
->vif
.type
) {
649 case NL80211_IFTYPE_STATION
:
650 case NL80211_IFTYPE_ADHOC
:
651 case NL80211_IFTYPE_AP
:
652 case NL80211_IFTYPE_MESH_POINT
:
653 case NL80211_IFTYPE_OCB
:
654 netif_carrier_off(dev
);
656 case NL80211_IFTYPE_WDS
:
657 case NL80211_IFTYPE_P2P_DEVICE
:
665 * Set default queue parameters so drivers don't
666 * need to initialise the hardware if the hardware
667 * doesn't start up with sane defaults.
668 * Enable QoS for anything but station interfaces.
670 ieee80211_set_wmm_default(sdata
, true,
671 sdata
->vif
.type
!= NL80211_IFTYPE_STATION
);
674 set_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
676 if (sdata
->vif
.type
== NL80211_IFTYPE_WDS
) {
677 /* Create STA entry for the WDS peer */
678 sta
= sta_info_alloc(sdata
, sdata
->u
.wds
.remote_addr
,
682 goto err_del_interface
;
685 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTH
);
686 sta_info_pre_move_state(sta
, IEEE80211_STA_ASSOC
);
687 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
689 res
= sta_info_insert(sta
);
691 /* STA has been freed */
692 goto err_del_interface
;
695 rate_control_rate_init(sta
);
696 netif_carrier_on(dev
);
697 } else if (sdata
->vif
.type
== NL80211_IFTYPE_P2P_DEVICE
) {
698 rcu_assign_pointer(local
->p2p_sdata
, sdata
);
702 * set_multicast_list will be invoked by the networking core
703 * which will check whether any increments here were done in
704 * error and sync them down to the hardware as filter flags.
706 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
707 atomic_inc(&local
->iff_allmultis
);
713 ieee80211_hw_config(local
, hw_reconf_flags
);
715 ieee80211_recalc_ps(local
);
717 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
718 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
719 /* XXX: for AP_VLAN, actually track AP queues */
720 netif_tx_start_all_queues(dev
);
723 int n_acs
= IEEE80211_NUM_ACS
;
726 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
729 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
730 if (sdata
->vif
.cab_queue
== IEEE80211_INVAL_HW_QUEUE
||
731 (local
->queue_stop_reasons
[sdata
->vif
.cab_queue
] == 0 &&
732 skb_queue_empty(&local
->pending
[sdata
->vif
.cab_queue
]))) {
733 for (ac
= 0; ac
< n_acs
; ac
++) {
734 int ac_queue
= sdata
->vif
.hw_queue
[ac
];
736 if (local
->queue_stop_reasons
[ac_queue
] == 0 &&
737 skb_queue_empty(&local
->pending
[ac_queue
]))
738 netif_start_subqueue(dev
, ac
);
741 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
746 drv_remove_interface(local
, sdata
);
748 if (!local
->open_count
)
752 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
753 mutex_lock(&local
->mtx
);
754 list_del(&sdata
->u
.vlan
.list
);
755 mutex_unlock(&local
->mtx
);
757 /* might already be clear but that doesn't matter */
758 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
762 static int ieee80211_open(struct net_device
*dev
)
764 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
767 /* fail early if user set an invalid address */
768 if (!is_valid_ether_addr(dev
->dev_addr
))
769 return -EADDRNOTAVAIL
;
771 err
= ieee80211_check_concurrent_iface(sdata
, sdata
->vif
.type
);
775 return ieee80211_do_open(&sdata
->wdev
, true);
778 static void ieee80211_do_stop(struct ieee80211_sub_if_data
*sdata
,
781 struct ieee80211_local
*local
= sdata
->local
;
782 struct fq
*fq
= &local
->fq
;
784 struct sk_buff
*skb
, *tmp
;
785 u32 hw_reconf_flags
= 0;
788 struct cfg80211_chan_def chandef
;
791 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
793 cancel_scan
= rcu_access_pointer(local
->scan_sdata
) == sdata
;
795 ieee80211_scan_cancel(local
);
798 * Stop TX on this interface first.
801 netif_tx_stop_all_queues(sdata
->dev
);
803 ieee80211_roc_purge(local
, sdata
);
805 switch (sdata
->vif
.type
) {
806 case NL80211_IFTYPE_STATION
:
807 ieee80211_mgd_stop(sdata
);
809 case NL80211_IFTYPE_ADHOC
:
810 ieee80211_ibss_stop(sdata
);
812 case NL80211_IFTYPE_AP
:
813 cancel_work_sync(&sdata
->u
.ap
.request_smps_work
);
820 * Remove all stations associated with this interface.
822 * This must be done before calling ops->remove_interface()
823 * because otherwise we can later invoke ops->sta_notify()
824 * whenever the STAs are removed, and that invalidates driver
825 * assumptions about always getting a vif pointer that is valid
826 * (because if we remove a STA after ops->remove_interface()
827 * the driver will have removed the vif info already!)
829 * In WDS mode a station must exist here and be flushed, for
830 * AP_VLANs stations may exist since there's nothing else that
831 * would have removed them, but in other modes there shouldn't
834 flushed
= sta_info_flush(sdata
);
835 WARN_ON_ONCE(sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
836 ((sdata
->vif
.type
!= NL80211_IFTYPE_WDS
&& flushed
> 0) ||
837 (sdata
->vif
.type
== NL80211_IFTYPE_WDS
&& flushed
!= 1)));
839 /* don't count this interface for allmulti while it is down */
840 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
841 atomic_dec(&local
->iff_allmultis
);
843 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
845 local
->fif_probe_req
--;
846 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
847 local
->fif_probe_req
--;
851 netif_addr_lock_bh(sdata
->dev
);
852 spin_lock_bh(&local
->filter_lock
);
853 __hw_addr_unsync(&local
->mc_list
, &sdata
->dev
->mc
,
854 sdata
->dev
->addr_len
);
855 spin_unlock_bh(&local
->filter_lock
);
856 netif_addr_unlock_bh(sdata
->dev
);
859 del_timer_sync(&local
->dynamic_ps_timer
);
860 cancel_work_sync(&local
->dynamic_ps_enable_work
);
862 cancel_work_sync(&sdata
->recalc_smps
);
864 mutex_lock(&local
->mtx
);
865 sdata
->vif
.csa_active
= false;
866 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
867 sdata
->u
.mgd
.csa_waiting_bcn
= false;
868 if (sdata
->csa_block_tx
) {
869 ieee80211_wake_vif_queues(local
, sdata
,
870 IEEE80211_QUEUE_STOP_REASON_CSA
);
871 sdata
->csa_block_tx
= false;
873 mutex_unlock(&local
->mtx
);
876 cancel_work_sync(&sdata
->csa_finalize_work
);
878 cancel_delayed_work_sync(&sdata
->dfs_cac_timer_work
);
880 if (sdata
->wdev
.cac_started
) {
881 chandef
= sdata
->vif
.bss_conf
.chandef
;
882 WARN_ON(local
->suspended
);
883 mutex_lock(&local
->mtx
);
884 ieee80211_vif_release_channel(sdata
);
885 mutex_unlock(&local
->mtx
);
886 cfg80211_cac_event(sdata
->dev
, &chandef
,
887 NL80211_RADAR_CAC_ABORTED
,
891 /* APs need special treatment */
892 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
893 struct ieee80211_sub_if_data
*vlan
, *tmpsdata
;
895 /* down all dependent devices, that is VLANs */
896 list_for_each_entry_safe(vlan
, tmpsdata
, &sdata
->u
.ap
.vlans
,
898 dev_close(vlan
->dev
);
899 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
900 } else if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
901 /* remove all packets in parent bc_buf pointing to this dev */
902 ps
= &sdata
->bss
->ps
;
904 spin_lock_irqsave(&ps
->bc_buf
.lock
, flags
);
905 skb_queue_walk_safe(&ps
->bc_buf
, skb
, tmp
) {
906 if (skb
->dev
== sdata
->dev
) {
907 __skb_unlink(skb
, &ps
->bc_buf
);
908 local
->total_ps_buffered
--;
909 ieee80211_free_txskb(&local
->hw
, skb
);
912 spin_unlock_irqrestore(&ps
->bc_buf
.lock
, flags
);
918 switch (sdata
->vif
.type
) {
919 case NL80211_IFTYPE_AP_VLAN
:
920 mutex_lock(&local
->mtx
);
921 list_del(&sdata
->u
.vlan
.list
);
922 mutex_unlock(&local
->mtx
);
923 RCU_INIT_POINTER(sdata
->vif
.chanctx_conf
, NULL
);
924 /* see comment in the default case below */
925 ieee80211_free_keys(sdata
, true);
926 /* no need to tell driver */
928 case NL80211_IFTYPE_MONITOR
:
929 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
930 local
->cooked_mntrs
--;
935 if (local
->monitors
== 0) {
936 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_MONITOR
;
937 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
940 ieee80211_adjust_monitor_flags(sdata
, -1);
942 case NL80211_IFTYPE_P2P_DEVICE
:
943 /* relies on synchronize_rcu() below */
944 RCU_INIT_POINTER(local
->p2p_sdata
, NULL
);
947 cancel_work_sync(&sdata
->work
);
949 * When we get here, the interface is marked down.
950 * Free the remaining keys, if there are any
951 * (which can happen in AP mode if userspace sets
952 * keys before the interface is operating, and maybe
955 * Force the key freeing to always synchronize_net()
956 * to wait for the RX path in case it is using this
957 * interface enqueuing frames at this very time on
960 ieee80211_free_keys(sdata
, true);
961 skb_queue_purge(&sdata
->skb_queue
);
966 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
967 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
968 skb_queue_walk_safe(&local
->pending
[i
], skb
, tmp
) {
969 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
970 if (info
->control
.vif
== &sdata
->vif
) {
971 __skb_unlink(skb
, &local
->pending
[i
]);
972 ieee80211_free_txskb(&local
->hw
, skb
);
976 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
978 if (sdata
->vif
.txq
) {
979 struct txq_info
*txqi
= to_txq_info(sdata
->vif
.txq
);
981 spin_lock_bh(&fq
->lock
);
982 ieee80211_txq_purge(local
, txqi
);
983 spin_unlock_bh(&fq
->lock
);
986 if (local
->open_count
== 0)
987 ieee80211_clear_tx_pending(local
);
990 * If the interface goes down while suspended, presumably because
991 * the device was unplugged and that happens before our resume,
992 * then the driver is already unconfigured and the remainder of
993 * this function isn't needed.
994 * XXX: what about WoWLAN? If the device has software state, e.g.
995 * memory allocated, it might expect teardown commands from
998 if (local
->suspended
) {
999 WARN_ON(local
->wowlan
);
1000 WARN_ON(rtnl_dereference(local
->monitor_sdata
));
1004 switch (sdata
->vif
.type
) {
1005 case NL80211_IFTYPE_AP_VLAN
:
1007 case NL80211_IFTYPE_MONITOR
:
1008 if (local
->monitors
== 0)
1009 ieee80211_del_virtual_monitor(local
);
1011 mutex_lock(&local
->mtx
);
1012 ieee80211_recalc_idle(local
);
1013 mutex_unlock(&local
->mtx
);
1015 if (!(sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
))
1021 drv_remove_interface(local
, sdata
);
1024 ieee80211_recalc_ps(local
);
1027 flush_delayed_work(&local
->scan_work
);
1029 if (local
->open_count
== 0) {
1030 ieee80211_stop_device(local
);
1032 /* no reconfiguring after stop! */
1036 /* do after stop to avoid reconfiguring when we stop anyway */
1037 ieee80211_configure_filter(local
);
1038 ieee80211_hw_config(local
, hw_reconf_flags
);
1040 if (local
->monitors
== local
->open_count
)
1041 ieee80211_add_virtual_monitor(local
);
1044 static int ieee80211_stop(struct net_device
*dev
)
1046 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1048 ieee80211_do_stop(sdata
, true);
1053 static void ieee80211_set_multicast_list(struct net_device
*dev
)
1055 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1056 struct ieee80211_local
*local
= sdata
->local
;
1057 int allmulti
, sdata_allmulti
;
1059 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
1060 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
1062 if (allmulti
!= sdata_allmulti
) {
1063 if (dev
->flags
& IFF_ALLMULTI
)
1064 atomic_inc(&local
->iff_allmultis
);
1066 atomic_dec(&local
->iff_allmultis
);
1067 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
1070 spin_lock_bh(&local
->filter_lock
);
1071 __hw_addr_sync(&local
->mc_list
, &dev
->mc
, dev
->addr_len
);
1072 spin_unlock_bh(&local
->filter_lock
);
1073 ieee80211_queue_work(&local
->hw
, &local
->reconfig_filter
);
1077 * Called when the netdev is removed or, by the code below, before
1078 * the interface type changes.
1080 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data
*sdata
)
1084 /* free extra data */
1085 ieee80211_free_keys(sdata
, false);
1087 ieee80211_debugfs_remove_netdev(sdata
);
1089 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
1090 __skb_queue_purge(&sdata
->fragments
[i
].skb_list
);
1091 sdata
->fragment_next
= 0;
1093 if (ieee80211_vif_is_mesh(&sdata
->vif
))
1094 ieee80211_mesh_teardown_sdata(sdata
);
1097 static void ieee80211_uninit(struct net_device
*dev
)
1099 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev
));
1102 static u16
ieee80211_netdev_select_queue(struct net_device
*dev
,
1103 struct sk_buff
*skb
,
1105 select_queue_fallback_t fallback
)
1107 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev
), skb
);
1110 static struct rtnl_link_stats64
*
1111 ieee80211_get_stats64(struct net_device
*dev
, struct rtnl_link_stats64
*stats
)
1115 for_each_possible_cpu(i
) {
1116 const struct pcpu_sw_netstats
*tstats
;
1117 u64 rx_packets
, rx_bytes
, tx_packets
, tx_bytes
;
1120 tstats
= per_cpu_ptr(dev
->tstats
, i
);
1123 start
= u64_stats_fetch_begin_irq(&tstats
->syncp
);
1124 rx_packets
= tstats
->rx_packets
;
1125 tx_packets
= tstats
->tx_packets
;
1126 rx_bytes
= tstats
->rx_bytes
;
1127 tx_bytes
= tstats
->tx_bytes
;
1128 } while (u64_stats_fetch_retry_irq(&tstats
->syncp
, start
));
1130 stats
->rx_packets
+= rx_packets
;
1131 stats
->tx_packets
+= tx_packets
;
1132 stats
->rx_bytes
+= rx_bytes
;
1133 stats
->tx_bytes
+= tx_bytes
;
1139 static const struct net_device_ops ieee80211_dataif_ops
= {
1140 .ndo_open
= ieee80211_open
,
1141 .ndo_stop
= ieee80211_stop
,
1142 .ndo_uninit
= ieee80211_uninit
,
1143 .ndo_start_xmit
= ieee80211_subif_start_xmit
,
1144 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
1145 .ndo_change_mtu
= ieee80211_change_mtu
,
1146 .ndo_set_mac_address
= ieee80211_change_mac
,
1147 .ndo_select_queue
= ieee80211_netdev_select_queue
,
1148 .ndo_get_stats64
= ieee80211_get_stats64
,
1151 static u16
ieee80211_monitor_select_queue(struct net_device
*dev
,
1152 struct sk_buff
*skb
,
1154 select_queue_fallback_t fallback
)
1156 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1157 struct ieee80211_local
*local
= sdata
->local
;
1158 struct ieee80211_hdr
*hdr
;
1159 struct ieee80211_radiotap_header
*rtap
= (void *)skb
->data
;
1161 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1165 skb
->len
< le16_to_cpu(rtap
->it_len
) + 2 /* frame control */)
1166 return 0; /* doesn't matter, frame will be dropped */
1168 hdr
= (void *)((u8
*)skb
->data
+ le16_to_cpu(rtap
->it_len
));
1170 return ieee80211_select_queue_80211(sdata
, skb
, hdr
);
1173 static const struct net_device_ops ieee80211_monitorif_ops
= {
1174 .ndo_open
= ieee80211_open
,
1175 .ndo_stop
= ieee80211_stop
,
1176 .ndo_uninit
= ieee80211_uninit
,
1177 .ndo_start_xmit
= ieee80211_monitor_start_xmit
,
1178 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
1179 .ndo_change_mtu
= ieee80211_change_mtu
,
1180 .ndo_set_mac_address
= ieee80211_change_mac
,
1181 .ndo_select_queue
= ieee80211_monitor_select_queue
,
1182 .ndo_get_stats64
= ieee80211_get_stats64
,
1185 static void ieee80211_if_free(struct net_device
*dev
)
1187 free_percpu(dev
->tstats
);
1191 static void ieee80211_if_setup(struct net_device
*dev
)
1194 dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1195 dev
->netdev_ops
= &ieee80211_dataif_ops
;
1196 dev
->destructor
= ieee80211_if_free
;
1199 static void ieee80211_if_setup_no_queue(struct net_device
*dev
)
1201 ieee80211_if_setup(dev
);
1202 dev
->priv_flags
|= IFF_NO_QUEUE
;
1205 static void ieee80211_iface_work(struct work_struct
*work
)
1207 struct ieee80211_sub_if_data
*sdata
=
1208 container_of(work
, struct ieee80211_sub_if_data
, work
);
1209 struct ieee80211_local
*local
= sdata
->local
;
1210 struct sk_buff
*skb
;
1211 struct sta_info
*sta
;
1212 struct ieee80211_ra_tid
*ra_tid
;
1213 struct ieee80211_rx_agg
*rx_agg
;
1215 if (!ieee80211_sdata_running(sdata
))
1218 if (test_bit(SCAN_SW_SCANNING
, &local
->scanning
))
1221 if (!ieee80211_can_run_worker(local
))
1224 /* first process frames */
1225 while ((skb
= skb_dequeue(&sdata
->skb_queue
))) {
1226 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
1228 if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_START
) {
1229 ra_tid
= (void *)&skb
->cb
;
1230 ieee80211_start_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
1232 } else if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_STOP
) {
1233 ra_tid
= (void *)&skb
->cb
;
1234 ieee80211_stop_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
1236 } else if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_RX_AGG_START
) {
1237 rx_agg
= (void *)&skb
->cb
;
1238 mutex_lock(&local
->sta_mtx
);
1239 sta
= sta_info_get_bss(sdata
, rx_agg
->addr
);
1241 __ieee80211_start_rx_ba_session(sta
,
1242 0, 0, 0, 1, rx_agg
->tid
,
1243 IEEE80211_MAX_AMPDU_BUF
,
1245 mutex_unlock(&local
->sta_mtx
);
1246 } else if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_RX_AGG_STOP
) {
1247 rx_agg
= (void *)&skb
->cb
;
1248 mutex_lock(&local
->sta_mtx
);
1249 sta
= sta_info_get_bss(sdata
, rx_agg
->addr
);
1251 __ieee80211_stop_rx_ba_session(sta
,
1253 WLAN_BACK_RECIPIENT
, 0,
1255 mutex_unlock(&local
->sta_mtx
);
1256 } else if (ieee80211_is_action(mgmt
->frame_control
) &&
1257 mgmt
->u
.action
.category
== WLAN_CATEGORY_BACK
) {
1260 mutex_lock(&local
->sta_mtx
);
1261 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
1263 switch (mgmt
->u
.action
.u
.addba_req
.action_code
) {
1264 case WLAN_ACTION_ADDBA_REQ
:
1265 ieee80211_process_addba_request(
1266 local
, sta
, mgmt
, len
);
1268 case WLAN_ACTION_ADDBA_RESP
:
1269 ieee80211_process_addba_resp(local
, sta
,
1272 case WLAN_ACTION_DELBA
:
1273 ieee80211_process_delba(sdata
, sta
,
1281 mutex_unlock(&local
->sta_mtx
);
1282 } else if (ieee80211_is_action(mgmt
->frame_control
) &&
1283 mgmt
->u
.action
.category
== WLAN_CATEGORY_VHT
) {
1284 switch (mgmt
->u
.action
.u
.vht_group_notif
.action_code
) {
1285 case WLAN_VHT_ACTION_GROUPID_MGMT
:
1286 ieee80211_process_mu_groups(sdata
, mgmt
);
1292 } else if (ieee80211_is_data_qos(mgmt
->frame_control
)) {
1293 struct ieee80211_hdr
*hdr
= (void *)mgmt
;
1295 * So the frame isn't mgmt, but frame_control
1296 * is at the right place anyway, of course, so
1297 * the if statement is correct.
1299 * Warn if we have other data frame types here,
1300 * they must not get here.
1302 WARN_ON(hdr
->frame_control
&
1303 cpu_to_le16(IEEE80211_STYPE_NULLFUNC
));
1304 WARN_ON(!(hdr
->seq_ctrl
&
1305 cpu_to_le16(IEEE80211_SCTL_FRAG
)));
1307 * This was a fragment of a frame, received while
1308 * a block-ack session was active. That cannot be
1309 * right, so terminate the session.
1311 mutex_lock(&local
->sta_mtx
);
1312 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
1314 u16 tid
= *ieee80211_get_qos_ctl(hdr
) &
1315 IEEE80211_QOS_CTL_TID_MASK
;
1317 __ieee80211_stop_rx_ba_session(
1318 sta
, tid
, WLAN_BACK_RECIPIENT
,
1319 WLAN_REASON_QSTA_REQUIRE_SETUP
,
1322 mutex_unlock(&local
->sta_mtx
);
1323 } else switch (sdata
->vif
.type
) {
1324 case NL80211_IFTYPE_STATION
:
1325 ieee80211_sta_rx_queued_mgmt(sdata
, skb
);
1327 case NL80211_IFTYPE_ADHOC
:
1328 ieee80211_ibss_rx_queued_mgmt(sdata
, skb
);
1330 case NL80211_IFTYPE_MESH_POINT
:
1331 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
1333 ieee80211_mesh_rx_queued_mgmt(sdata
, skb
);
1336 WARN(1, "frame for unexpected interface type");
1343 /* then other type-dependent work */
1344 switch (sdata
->vif
.type
) {
1345 case NL80211_IFTYPE_STATION
:
1346 ieee80211_sta_work(sdata
);
1348 case NL80211_IFTYPE_ADHOC
:
1349 ieee80211_ibss_work(sdata
);
1351 case NL80211_IFTYPE_MESH_POINT
:
1352 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
1354 ieee80211_mesh_work(sdata
);
1356 case NL80211_IFTYPE_OCB
:
1357 ieee80211_ocb_work(sdata
);
1364 static void ieee80211_recalc_smps_work(struct work_struct
*work
)
1366 struct ieee80211_sub_if_data
*sdata
=
1367 container_of(work
, struct ieee80211_sub_if_data
, recalc_smps
);
1369 ieee80211_recalc_smps(sdata
);
1373 * Helper function to initialise an interface to a specific type.
1375 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data
*sdata
,
1376 enum nl80211_iftype type
)
1378 static const u8 bssid_wildcard
[ETH_ALEN
] = {0xff, 0xff, 0xff,
1381 /* clear type-dependent union */
1382 memset(&sdata
->u
, 0, sizeof(sdata
->u
));
1384 /* and set some type-dependent values */
1385 sdata
->vif
.type
= type
;
1386 sdata
->vif
.p2p
= false;
1387 sdata
->wdev
.iftype
= type
;
1389 sdata
->control_port_protocol
= cpu_to_be16(ETH_P_PAE
);
1390 sdata
->control_port_no_encrypt
= false;
1391 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
1392 sdata
->vif
.bss_conf
.idle
= true;
1394 sdata
->noack_map
= 0;
1396 /* only monitor/p2p-device differ */
1398 sdata
->dev
->netdev_ops
= &ieee80211_dataif_ops
;
1399 sdata
->dev
->type
= ARPHRD_ETHER
;
1402 skb_queue_head_init(&sdata
->skb_queue
);
1403 INIT_WORK(&sdata
->work
, ieee80211_iface_work
);
1404 INIT_WORK(&sdata
->recalc_smps
, ieee80211_recalc_smps_work
);
1405 INIT_WORK(&sdata
->csa_finalize_work
, ieee80211_csa_finalize_work
);
1406 INIT_LIST_HEAD(&sdata
->assigned_chanctx_list
);
1407 INIT_LIST_HEAD(&sdata
->reserved_chanctx_list
);
1410 case NL80211_IFTYPE_P2P_GO
:
1411 type
= NL80211_IFTYPE_AP
;
1412 sdata
->vif
.type
= type
;
1413 sdata
->vif
.p2p
= true;
1415 case NL80211_IFTYPE_AP
:
1416 skb_queue_head_init(&sdata
->u
.ap
.ps
.bc_buf
);
1417 INIT_LIST_HEAD(&sdata
->u
.ap
.vlans
);
1418 INIT_WORK(&sdata
->u
.ap
.request_smps_work
,
1419 ieee80211_request_smps_ap_work
);
1420 sdata
->vif
.bss_conf
.bssid
= sdata
->vif
.addr
;
1421 sdata
->u
.ap
.req_smps
= IEEE80211_SMPS_OFF
;
1423 case NL80211_IFTYPE_P2P_CLIENT
:
1424 type
= NL80211_IFTYPE_STATION
;
1425 sdata
->vif
.type
= type
;
1426 sdata
->vif
.p2p
= true;
1428 case NL80211_IFTYPE_STATION
:
1429 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.mgd
.bssid
;
1430 ieee80211_sta_setup_sdata(sdata
);
1432 case NL80211_IFTYPE_OCB
:
1433 sdata
->vif
.bss_conf
.bssid
= bssid_wildcard
;
1434 ieee80211_ocb_setup_sdata(sdata
);
1436 case NL80211_IFTYPE_ADHOC
:
1437 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.ibss
.bssid
;
1438 ieee80211_ibss_setup_sdata(sdata
);
1440 case NL80211_IFTYPE_MESH_POINT
:
1441 if (ieee80211_vif_is_mesh(&sdata
->vif
))
1442 ieee80211_mesh_init_sdata(sdata
);
1444 case NL80211_IFTYPE_MONITOR
:
1445 sdata
->dev
->type
= ARPHRD_IEEE80211_RADIOTAP
;
1446 sdata
->dev
->netdev_ops
= &ieee80211_monitorif_ops
;
1447 sdata
->u
.mntr_flags
= MONITOR_FLAG_CONTROL
|
1448 MONITOR_FLAG_OTHER_BSS
;
1450 case NL80211_IFTYPE_WDS
:
1451 sdata
->vif
.bss_conf
.bssid
= NULL
;
1453 case NL80211_IFTYPE_AP_VLAN
:
1454 case NL80211_IFTYPE_P2P_DEVICE
:
1455 sdata
->vif
.bss_conf
.bssid
= sdata
->vif
.addr
;
1457 case NL80211_IFTYPE_UNSPECIFIED
:
1458 case NUM_NL80211_IFTYPES
:
1463 ieee80211_debugfs_add_netdev(sdata
);
1466 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data
*sdata
,
1467 enum nl80211_iftype type
)
1469 struct ieee80211_local
*local
= sdata
->local
;
1471 enum nl80211_iftype internal_type
= type
;
1476 if (!local
->ops
->change_interface
)
1479 switch (sdata
->vif
.type
) {
1480 case NL80211_IFTYPE_AP
:
1481 case NL80211_IFTYPE_STATION
:
1482 case NL80211_IFTYPE_ADHOC
:
1483 case NL80211_IFTYPE_OCB
:
1485 * Could maybe also all others here?
1486 * Just not sure how that interacts
1487 * with the RX/config path e.g. for
1496 case NL80211_IFTYPE_AP
:
1497 case NL80211_IFTYPE_STATION
:
1498 case NL80211_IFTYPE_ADHOC
:
1499 case NL80211_IFTYPE_OCB
:
1501 * Could probably support everything
1502 * but WDS here (WDS do_open can fail
1503 * under memory pressure, which this
1504 * code isn't prepared to handle).
1507 case NL80211_IFTYPE_P2P_CLIENT
:
1509 internal_type
= NL80211_IFTYPE_STATION
;
1511 case NL80211_IFTYPE_P2P_GO
:
1513 internal_type
= NL80211_IFTYPE_AP
;
1519 ret
= ieee80211_check_concurrent_iface(sdata
, internal_type
);
1523 ieee80211_do_stop(sdata
, false);
1525 ieee80211_teardown_sdata(sdata
);
1527 ret
= drv_change_interface(local
, sdata
, internal_type
, p2p
);
1529 type
= ieee80211_vif_type_p2p(&sdata
->vif
);
1532 * Ignore return value here, there's not much we can do since
1533 * the driver changed the interface type internally already.
1534 * The warnings will hopefully make driver authors fix it :-)
1536 ieee80211_check_queues(sdata
, type
);
1538 ieee80211_setup_sdata(sdata
, type
);
1540 err
= ieee80211_do_open(&sdata
->wdev
, false);
1541 WARN(err
, "type change: do_open returned %d", err
);
1546 int ieee80211_if_change_type(struct ieee80211_sub_if_data
*sdata
,
1547 enum nl80211_iftype type
)
1553 if (type
== ieee80211_vif_type_p2p(&sdata
->vif
))
1556 if (ieee80211_sdata_running(sdata
)) {
1557 ret
= ieee80211_runtime_change_iftype(sdata
, type
);
1561 /* Purge and reset type-dependent state. */
1562 ieee80211_teardown_sdata(sdata
);
1563 ieee80211_setup_sdata(sdata
, type
);
1566 /* reset some values that shouldn't be kept across type changes */
1567 if (type
== NL80211_IFTYPE_STATION
)
1568 sdata
->u
.mgd
.use_4addr
= false;
1573 static void ieee80211_assign_perm_addr(struct ieee80211_local
*local
,
1574 u8
*perm_addr
, enum nl80211_iftype type
)
1576 struct ieee80211_sub_if_data
*sdata
;
1577 u64 mask
, start
, addr
, val
, inc
;
1579 u8 tmp_addr
[ETH_ALEN
];
1582 /* default ... something at least */
1583 memcpy(perm_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
1585 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
) &&
1586 local
->hw
.wiphy
->n_addresses
<= 1)
1589 mutex_lock(&local
->iflist_mtx
);
1592 case NL80211_IFTYPE_MONITOR
:
1593 /* doesn't matter */
1595 case NL80211_IFTYPE_WDS
:
1596 case NL80211_IFTYPE_AP_VLAN
:
1597 /* match up with an AP interface */
1598 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1599 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
1601 memcpy(perm_addr
, sdata
->vif
.addr
, ETH_ALEN
);
1604 /* keep default if no AP interface present */
1606 case NL80211_IFTYPE_P2P_CLIENT
:
1607 case NL80211_IFTYPE_P2P_GO
:
1608 if (ieee80211_hw_check(&local
->hw
, P2P_DEV_ADDR_FOR_INTF
)) {
1609 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1610 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
)
1612 if (!ieee80211_sdata_running(sdata
))
1614 memcpy(perm_addr
, sdata
->vif
.addr
, ETH_ALEN
);
1618 /* otherwise fall through */
1620 /* assign a new address if possible -- try n_addresses first */
1621 for (i
= 0; i
< local
->hw
.wiphy
->n_addresses
; i
++) {
1624 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1625 if (ether_addr_equal(local
->hw
.wiphy
->addresses
[i
].addr
,
1634 local
->hw
.wiphy
->addresses
[i
].addr
,
1640 /* try mask if available */
1641 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
))
1644 m
= local
->hw
.wiphy
->addr_mask
;
1645 mask
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1646 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1647 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1649 if (__ffs64(mask
) + hweight64(mask
) != fls64(mask
)) {
1650 /* not a contiguous mask ... not handled now! */
1651 pr_info("not contiguous\n");
1656 * Pick address of existing interface in case user changed
1657 * MAC address manually, default to perm_addr.
1659 m
= local
->hw
.wiphy
->perm_addr
;
1660 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1661 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
)
1663 m
= sdata
->vif
.addr
;
1666 start
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1667 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1668 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1670 inc
= 1ULL<<__ffs64(mask
);
1671 val
= (start
& mask
);
1672 addr
= (start
& ~mask
) | (val
& mask
);
1676 tmp_addr
[5] = addr
>> 0*8;
1677 tmp_addr
[4] = addr
>> 1*8;
1678 tmp_addr
[3] = addr
>> 2*8;
1679 tmp_addr
[2] = addr
>> 3*8;
1680 tmp_addr
[1] = addr
>> 4*8;
1681 tmp_addr
[0] = addr
>> 5*8;
1685 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1686 if (ether_addr_equal(tmp_addr
, sdata
->vif
.addr
)) {
1693 memcpy(perm_addr
, tmp_addr
, ETH_ALEN
);
1696 addr
= (start
& ~mask
) | (val
& mask
);
1697 } while (addr
!= start
);
1703 mutex_unlock(&local
->iflist_mtx
);
1706 int ieee80211_if_add(struct ieee80211_local
*local
, const char *name
,
1707 unsigned char name_assign_type
,
1708 struct wireless_dev
**new_wdev
, enum nl80211_iftype type
,
1709 struct vif_params
*params
)
1711 struct net_device
*ndev
= NULL
;
1712 struct ieee80211_sub_if_data
*sdata
= NULL
;
1713 struct txq_info
*txqi
;
1714 void (*if_setup
)(struct net_device
*dev
);
1720 if (type
== NL80211_IFTYPE_P2P_DEVICE
) {
1721 struct wireless_dev
*wdev
;
1723 sdata
= kzalloc(sizeof(*sdata
) + local
->hw
.vif_data_size
,
1727 wdev
= &sdata
->wdev
;
1730 strlcpy(sdata
->name
, name
, IFNAMSIZ
);
1731 ieee80211_assign_perm_addr(local
, wdev
->address
, type
);
1732 memcpy(sdata
->vif
.addr
, wdev
->address
, ETH_ALEN
);
1734 int size
= ALIGN(sizeof(*sdata
) + local
->hw
.vif_data_size
,
1738 if (local
->ops
->wake_tx_queue
)
1739 txq_size
+= sizeof(struct txq_info
) +
1740 local
->hw
.txq_data_size
;
1742 if (local
->ops
->wake_tx_queue
)
1743 if_setup
= ieee80211_if_setup_no_queue
;
1745 if_setup
= ieee80211_if_setup
;
1747 if (local
->hw
.queues
>= IEEE80211_NUM_ACS
)
1748 txqs
= IEEE80211_NUM_ACS
;
1750 ndev
= alloc_netdev_mqs(size
+ txq_size
,
1751 name
, name_assign_type
,
1755 dev_net_set(ndev
, wiphy_net(local
->hw
.wiphy
));
1757 ndev
->tstats
= netdev_alloc_pcpu_stats(struct pcpu_sw_netstats
);
1758 if (!ndev
->tstats
) {
1763 ndev
->needed_headroom
= local
->tx_headroom
+
1764 4*6 /* four MAC addresses */
1765 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1767 + 8 /* rfc1042/bridge tunnel */
1768 - ETH_HLEN
/* ethernet hard_header_len */
1769 + IEEE80211_ENCRYPT_HEADROOM
;
1770 ndev
->needed_tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
1772 ret
= dev_alloc_name(ndev
, ndev
->name
);
1774 ieee80211_if_free(ndev
);
1778 ieee80211_assign_perm_addr(local
, ndev
->perm_addr
, type
);
1779 if (params
&& is_valid_ether_addr(params
->macaddr
))
1780 memcpy(ndev
->dev_addr
, params
->macaddr
, ETH_ALEN
);
1782 memcpy(ndev
->dev_addr
, ndev
->perm_addr
, ETH_ALEN
);
1783 SET_NETDEV_DEV(ndev
, wiphy_dev(local
->hw
.wiphy
));
1785 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1786 sdata
= netdev_priv(ndev
);
1787 ndev
->ieee80211_ptr
= &sdata
->wdev
;
1788 memcpy(sdata
->vif
.addr
, ndev
->dev_addr
, ETH_ALEN
);
1789 memcpy(sdata
->name
, ndev
->name
, IFNAMSIZ
);
1792 txqi
= netdev_priv(ndev
) + size
;
1793 ieee80211_txq_init(sdata
, NULL
, txqi
, 0);
1799 /* initialise type-independent data */
1800 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
1801 sdata
->local
= local
;
1803 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
1804 skb_queue_head_init(&sdata
->fragments
[i
].skb_list
);
1806 INIT_LIST_HEAD(&sdata
->key_list
);
1808 INIT_DELAYED_WORK(&sdata
->dfs_cac_timer_work
,
1809 ieee80211_dfs_cac_timer_work
);
1810 INIT_DELAYED_WORK(&sdata
->dec_tailroom_needed_wk
,
1811 ieee80211_delayed_tailroom_dec
);
1813 for (i
= 0; i
< NUM_NL80211_BANDS
; i
++) {
1814 struct ieee80211_supported_band
*sband
;
1815 sband
= local
->hw
.wiphy
->bands
[i
];
1816 sdata
->rc_rateidx_mask
[i
] =
1817 sband
? (1 << sband
->n_bitrates
) - 1 : 0;
1822 memcpy(sdata
->rc_rateidx_mcs_mask
[i
],
1823 sband
->ht_cap
.mcs
.rx_mask
,
1824 sizeof(sdata
->rc_rateidx_mcs_mask
[i
]));
1826 cap
= sband
->vht_cap
.vht_mcs
.rx_mcs_map
;
1827 vht_rate_mask
= sdata
->rc_rateidx_vht_mcs_mask
[i
];
1828 ieee80211_get_vht_mask_from_cap(cap
, vht_rate_mask
);
1830 memset(sdata
->rc_rateidx_mcs_mask
[i
], 0,
1831 sizeof(sdata
->rc_rateidx_mcs_mask
[i
]));
1832 memset(sdata
->rc_rateidx_vht_mcs_mask
[i
], 0,
1833 sizeof(sdata
->rc_rateidx_vht_mcs_mask
[i
]));
1837 ieee80211_set_default_queues(sdata
);
1839 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
1840 sdata
->user_power_level
= local
->user_power_level
;
1842 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
1844 /* setup type-dependent data */
1845 ieee80211_setup_sdata(sdata
, type
);
1849 ndev
->ieee80211_ptr
->use_4addr
= params
->use_4addr
;
1850 if (type
== NL80211_IFTYPE_STATION
)
1851 sdata
->u
.mgd
.use_4addr
= params
->use_4addr
;
1854 ndev
->features
|= local
->hw
.netdev_features
;
1856 netdev_set_default_ethtool_ops(ndev
, &ieee80211_ethtool_ops
);
1858 ret
= register_netdevice(ndev
);
1860 ieee80211_if_free(ndev
);
1865 mutex_lock(&local
->iflist_mtx
);
1866 list_add_tail_rcu(&sdata
->list
, &local
->interfaces
);
1867 mutex_unlock(&local
->iflist_mtx
);
1870 *new_wdev
= &sdata
->wdev
;
1875 void ieee80211_if_remove(struct ieee80211_sub_if_data
*sdata
)
1879 mutex_lock(&sdata
->local
->iflist_mtx
);
1880 list_del_rcu(&sdata
->list
);
1881 mutex_unlock(&sdata
->local
->iflist_mtx
);
1886 unregister_netdevice(sdata
->dev
);
1888 cfg80211_unregister_wdev(&sdata
->wdev
);
1889 ieee80211_teardown_sdata(sdata
);
1894 void ieee80211_sdata_stop(struct ieee80211_sub_if_data
*sdata
)
1896 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING
, &sdata
->state
)))
1898 ieee80211_do_stop(sdata
, true);
1901 void ieee80211_remove_interfaces(struct ieee80211_local
*local
)
1903 struct ieee80211_sub_if_data
*sdata
, *tmp
;
1904 LIST_HEAD(unreg_list
);
1905 LIST_HEAD(wdev_list
);
1909 /* Before destroying the interfaces, make sure they're all stopped so
1910 * that the hardware is stopped. Otherwise, the driver might still be
1911 * iterating the interfaces during the shutdown, e.g. from a worker
1912 * or from RX processing or similar, and if it does so (using atomic
1913 * iteration) while we're manipulating the list, the iteration will
1916 * After this, the hardware should be stopped and the driver should
1917 * have stopped all of its activities, so that we can do RCU-unaware
1918 * manipulations of the interface list below.
1920 cfg80211_shutdown_all_interfaces(local
->hw
.wiphy
);
1922 WARN(local
->open_count
, "%s: open count remains %d\n",
1923 wiphy_name(local
->hw
.wiphy
), local
->open_count
);
1925 mutex_lock(&local
->iflist_mtx
);
1926 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
1927 list_del(&sdata
->list
);
1930 unregister_netdevice_queue(sdata
->dev
, &unreg_list
);
1932 list_add(&sdata
->list
, &wdev_list
);
1934 mutex_unlock(&local
->iflist_mtx
);
1935 unregister_netdevice_many(&unreg_list
);
1937 list_for_each_entry_safe(sdata
, tmp
, &wdev_list
, list
) {
1938 list_del(&sdata
->list
);
1939 cfg80211_unregister_wdev(&sdata
->wdev
);
1944 static int netdev_notify(struct notifier_block
*nb
,
1945 unsigned long state
, void *ptr
)
1947 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
1948 struct ieee80211_sub_if_data
*sdata
;
1950 if (state
!= NETDEV_CHANGENAME
)
1953 if (!dev
->ieee80211_ptr
|| !dev
->ieee80211_ptr
->wiphy
)
1956 if (dev
->ieee80211_ptr
->wiphy
->privid
!= mac80211_wiphy_privid
)
1959 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1960 memcpy(sdata
->name
, dev
->name
, IFNAMSIZ
);
1961 ieee80211_debugfs_rename_netdev(sdata
);
1966 static struct notifier_block mac80211_netdev_notifier
= {
1967 .notifier_call
= netdev_notify
,
1970 int ieee80211_iface_init(void)
1972 return register_netdevice_notifier(&mac80211_netdev_notifier
);
1975 void ieee80211_iface_exit(void)
1977 unregister_netdevice_notifier(&mac80211_netdev_notifier
);