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
) || update_bss
)
80 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_TXPOWER
);
83 static u32
__ieee80211_idle_off(struct ieee80211_local
*local
)
85 if (!(local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
))
88 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_IDLE
;
89 return IEEE80211_CONF_CHANGE_IDLE
;
92 static u32
__ieee80211_idle_on(struct ieee80211_local
*local
)
94 if (local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
)
97 ieee80211_flush_queues(local
, NULL
, false);
99 local
->hw
.conf
.flags
|= IEEE80211_CONF_IDLE
;
100 return IEEE80211_CONF_CHANGE_IDLE
;
103 static u32
__ieee80211_recalc_idle(struct ieee80211_local
*local
,
106 bool working
, scanning
, active
;
107 unsigned int led_trig_start
= 0, led_trig_stop
= 0;
109 lockdep_assert_held(&local
->mtx
);
111 active
= force_active
||
112 !list_empty(&local
->chanctx_list
) ||
115 working
= !local
->ops
->remain_on_channel
&&
116 !list_empty(&local
->roc_list
);
118 scanning
= test_bit(SCAN_SW_SCANNING
, &local
->scanning
) ||
119 test_bit(SCAN_ONCHANNEL_SCANNING
, &local
->scanning
);
121 if (working
|| scanning
)
122 led_trig_start
|= IEEE80211_TPT_LEDTRIG_FL_WORK
;
124 led_trig_stop
|= IEEE80211_TPT_LEDTRIG_FL_WORK
;
127 led_trig_start
|= IEEE80211_TPT_LEDTRIG_FL_CONNECTED
;
129 led_trig_stop
|= IEEE80211_TPT_LEDTRIG_FL_CONNECTED
;
131 ieee80211_mod_tpt_led_trig(local
, led_trig_start
, led_trig_stop
);
133 if (working
|| scanning
|| active
)
134 return __ieee80211_idle_off(local
);
135 return __ieee80211_idle_on(local
);
138 u32
ieee80211_idle_off(struct ieee80211_local
*local
)
140 return __ieee80211_recalc_idle(local
, true);
143 void ieee80211_recalc_idle(struct ieee80211_local
*local
)
145 u32 change
= __ieee80211_recalc_idle(local
, false);
147 ieee80211_hw_config(local
, change
);
150 static int ieee80211_change_mtu(struct net_device
*dev
, int new_mtu
)
152 if (new_mtu
< 256 || new_mtu
> IEEE80211_MAX_DATA_LEN
)
159 static int ieee80211_verify_mac(struct ieee80211_sub_if_data
*sdata
, u8
*addr
,
162 struct ieee80211_local
*local
= sdata
->local
;
163 struct ieee80211_sub_if_data
*iter
;
168 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
))
172 new = ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
173 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
174 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
176 m
= local
->hw
.wiphy
->addr_mask
;
177 mask
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
178 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
179 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
184 mutex_lock(&local
->iflist_mtx
);
185 list_for_each_entry(iter
, &local
->interfaces
, list
) {
189 if (iter
->vif
.type
== NL80211_IFTYPE_MONITOR
&&
190 !(iter
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
))
194 tmp
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
195 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
196 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
198 if ((new & ~mask
) != (tmp
& ~mask
)) {
203 mutex_unlock(&local
->iflist_mtx
);
208 static int ieee80211_change_mac(struct net_device
*dev
, void *addr
)
210 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
211 struct sockaddr
*sa
= addr
;
212 bool check_dup
= true;
215 if (ieee80211_sdata_running(sdata
))
218 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
&&
219 !(sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
))
222 ret
= ieee80211_verify_mac(sdata
, sa
->sa_data
, check_dup
);
226 ret
= eth_mac_addr(dev
, sa
);
229 memcpy(sdata
->vif
.addr
, sa
->sa_data
, ETH_ALEN
);
234 static inline int identical_mac_addr_allowed(int type1
, int type2
)
236 return type1
== NL80211_IFTYPE_MONITOR
||
237 type2
== NL80211_IFTYPE_MONITOR
||
238 type1
== NL80211_IFTYPE_P2P_DEVICE
||
239 type2
== NL80211_IFTYPE_P2P_DEVICE
||
240 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_WDS
) ||
241 (type1
== NL80211_IFTYPE_WDS
&&
242 (type2
== NL80211_IFTYPE_WDS
||
243 type2
== NL80211_IFTYPE_AP
)) ||
244 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_AP_VLAN
) ||
245 (type1
== NL80211_IFTYPE_AP_VLAN
&&
246 (type2
== NL80211_IFTYPE_AP
||
247 type2
== NL80211_IFTYPE_AP_VLAN
));
250 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data
*sdata
,
251 enum nl80211_iftype iftype
)
253 struct ieee80211_local
*local
= sdata
->local
;
254 struct ieee80211_sub_if_data
*nsdata
;
259 /* we hold the RTNL here so can safely walk the list */
260 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
261 if (nsdata
!= sdata
&& ieee80211_sdata_running(nsdata
)) {
263 * Only OCB and monitor mode may coexist
265 if ((sdata
->vif
.type
== NL80211_IFTYPE_OCB
&&
266 nsdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
) ||
267 (sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
268 nsdata
->vif
.type
== NL80211_IFTYPE_OCB
))
272 * Allow only a single IBSS interface to be up at any
273 * time. This is restricted because beacon distribution
274 * cannot work properly if both are in the same IBSS.
276 * To remove this restriction we'd have to disallow them
277 * from setting the same SSID on different IBSS interfaces
278 * belonging to the same hardware. Then, however, we're
279 * faced with having to adopt two different TSF timers...
281 if (iftype
== NL80211_IFTYPE_ADHOC
&&
282 nsdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
285 * will not add another interface while any channel
288 if (nsdata
->vif
.csa_active
)
292 * The remaining checks are only performed for interfaces
293 * with the same MAC address.
295 if (!ether_addr_equal(sdata
->vif
.addr
,
300 * check whether it may have the same address
302 if (!identical_mac_addr_allowed(iftype
,
307 * can only add VLANs to enabled APs
309 if (iftype
== NL80211_IFTYPE_AP_VLAN
&&
310 nsdata
->vif
.type
== NL80211_IFTYPE_AP
)
311 sdata
->bss
= &nsdata
->u
.ap
;
315 mutex_lock(&local
->chanctx_mtx
);
316 ret
= ieee80211_check_combinations(sdata
, NULL
, 0, 0);
317 mutex_unlock(&local
->chanctx_mtx
);
321 static int ieee80211_check_queues(struct ieee80211_sub_if_data
*sdata
,
322 enum nl80211_iftype iftype
)
324 int n_queues
= sdata
->local
->hw
.queues
;
327 if (iftype
!= NL80211_IFTYPE_P2P_DEVICE
) {
328 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
329 if (WARN_ON_ONCE(sdata
->vif
.hw_queue
[i
] ==
330 IEEE80211_INVAL_HW_QUEUE
))
332 if (WARN_ON_ONCE(sdata
->vif
.hw_queue
[i
] >=
338 if ((iftype
!= NL80211_IFTYPE_AP
&&
339 iftype
!= NL80211_IFTYPE_P2P_GO
&&
340 iftype
!= NL80211_IFTYPE_MESH_POINT
) ||
341 !ieee80211_hw_check(&sdata
->local
->hw
, QUEUE_CONTROL
)) {
342 sdata
->vif
.cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
346 if (WARN_ON_ONCE(sdata
->vif
.cab_queue
== IEEE80211_INVAL_HW_QUEUE
))
349 if (WARN_ON_ONCE(sdata
->vif
.cab_queue
>= n_queues
))
355 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data
*sdata
,
358 struct ieee80211_local
*local
= sdata
->local
;
359 u32 flags
= sdata
->u
.mntr_flags
;
361 #define ADJUST(_f, _s) do { \
362 if (flags & MONITOR_FLAG_##_f) \
363 local->fif_##_s += offset; \
366 ADJUST(FCSFAIL
, fcsfail
);
367 ADJUST(PLCPFAIL
, plcpfail
);
368 ADJUST(CONTROL
, control
);
369 ADJUST(CONTROL
, pspoll
);
370 ADJUST(OTHER_BSS
, other_bss
);
375 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data
*sdata
)
377 struct ieee80211_local
*local
= sdata
->local
;
380 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
381 if (ieee80211_hw_check(&local
->hw
, QUEUE_CONTROL
))
382 sdata
->vif
.hw_queue
[i
] = IEEE80211_INVAL_HW_QUEUE
;
383 else if (local
->hw
.queues
>= IEEE80211_NUM_ACS
)
384 sdata
->vif
.hw_queue
[i
] = i
;
386 sdata
->vif
.hw_queue
[i
] = 0;
388 sdata
->vif
.cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
391 int ieee80211_add_virtual_monitor(struct ieee80211_local
*local
)
393 struct ieee80211_sub_if_data
*sdata
;
396 if (!ieee80211_hw_check(&local
->hw
, WANT_MONITOR_VIF
))
401 if (local
->monitor_sdata
)
404 sdata
= kzalloc(sizeof(*sdata
) + local
->hw
.vif_data_size
, GFP_KERNEL
);
409 sdata
->local
= local
;
410 sdata
->vif
.type
= NL80211_IFTYPE_MONITOR
;
411 snprintf(sdata
->name
, IFNAMSIZ
, "%s-monitor",
412 wiphy_name(local
->hw
.wiphy
));
413 sdata
->wdev
.iftype
= NL80211_IFTYPE_MONITOR
;
415 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
417 ieee80211_set_default_queues(sdata
);
419 ret
= drv_add_interface(local
, sdata
);
421 /* ok .. stupid driver, it asked for this! */
426 ret
= ieee80211_check_queues(sdata
, NL80211_IFTYPE_MONITOR
);
432 mutex_lock(&local
->iflist_mtx
);
433 rcu_assign_pointer(local
->monitor_sdata
, sdata
);
434 mutex_unlock(&local
->iflist_mtx
);
436 mutex_lock(&local
->mtx
);
437 ret
= ieee80211_vif_use_channel(sdata
, &local
->monitor_chandef
,
438 IEEE80211_CHANCTX_EXCLUSIVE
);
439 mutex_unlock(&local
->mtx
);
441 mutex_lock(&local
->iflist_mtx
);
442 RCU_INIT_POINTER(local
->monitor_sdata
, NULL
);
443 mutex_unlock(&local
->iflist_mtx
);
445 drv_remove_interface(local
, sdata
);
453 void ieee80211_del_virtual_monitor(struct ieee80211_local
*local
)
455 struct ieee80211_sub_if_data
*sdata
;
457 if (!ieee80211_hw_check(&local
->hw
, WANT_MONITOR_VIF
))
462 mutex_lock(&local
->iflist_mtx
);
464 sdata
= rcu_dereference_protected(local
->monitor_sdata
,
465 lockdep_is_held(&local
->iflist_mtx
));
467 mutex_unlock(&local
->iflist_mtx
);
471 RCU_INIT_POINTER(local
->monitor_sdata
, NULL
);
472 mutex_unlock(&local
->iflist_mtx
);
476 mutex_lock(&local
->mtx
);
477 ieee80211_vif_release_channel(sdata
);
478 mutex_unlock(&local
->mtx
);
480 drv_remove_interface(local
, sdata
);
486 * NOTE: Be very careful when changing this function, it must NOT return
487 * an error on interface type changes that have been pre-checked, so most
488 * checks should be in ieee80211_check_concurrent_iface.
490 int ieee80211_do_open(struct wireless_dev
*wdev
, bool coming_up
)
492 struct ieee80211_sub_if_data
*sdata
= IEEE80211_WDEV_TO_SUB_IF(wdev
);
493 struct net_device
*dev
= wdev
->netdev
;
494 struct ieee80211_local
*local
= sdata
->local
;
495 struct sta_info
*sta
;
498 u32 hw_reconf_flags
= 0;
500 switch (sdata
->vif
.type
) {
501 case NL80211_IFTYPE_WDS
:
502 if (!is_valid_ether_addr(sdata
->u
.wds
.remote_addr
))
505 case NL80211_IFTYPE_AP_VLAN
: {
506 struct ieee80211_sub_if_data
*master
;
511 mutex_lock(&local
->mtx
);
512 list_add(&sdata
->u
.vlan
.list
, &sdata
->bss
->vlans
);
513 mutex_unlock(&local
->mtx
);
515 master
= container_of(sdata
->bss
,
516 struct ieee80211_sub_if_data
, u
.ap
);
517 sdata
->control_port_protocol
=
518 master
->control_port_protocol
;
519 sdata
->control_port_no_encrypt
=
520 master
->control_port_no_encrypt
;
521 sdata
->vif
.cab_queue
= master
->vif
.cab_queue
;
522 memcpy(sdata
->vif
.hw_queue
, master
->vif
.hw_queue
,
523 sizeof(sdata
->vif
.hw_queue
));
524 sdata
->vif
.bss_conf
.chandef
= master
->vif
.bss_conf
.chandef
;
526 mutex_lock(&local
->key_mtx
);
527 sdata
->crypto_tx_tailroom_needed_cnt
+=
528 master
->crypto_tx_tailroom_needed_cnt
;
529 mutex_unlock(&local
->key_mtx
);
533 case NL80211_IFTYPE_AP
:
534 sdata
->bss
= &sdata
->u
.ap
;
536 case NL80211_IFTYPE_MESH_POINT
:
537 case NL80211_IFTYPE_STATION
:
538 case NL80211_IFTYPE_MONITOR
:
539 case NL80211_IFTYPE_ADHOC
:
540 case NL80211_IFTYPE_P2P_DEVICE
:
541 case NL80211_IFTYPE_OCB
:
542 /* no special treatment */
544 case NL80211_IFTYPE_UNSPECIFIED
:
545 case NUM_NL80211_IFTYPES
:
546 case NL80211_IFTYPE_P2P_CLIENT
:
547 case NL80211_IFTYPE_P2P_GO
:
553 if (local
->open_count
== 0) {
554 res
= drv_start(local
);
557 /* we're brought up, everything changes */
558 hw_reconf_flags
= ~0;
559 ieee80211_led_radio(local
, true);
560 ieee80211_mod_tpt_led_trig(local
,
561 IEEE80211_TPT_LEDTRIG_FL_RADIO
, 0);
565 * Copy the hopefully now-present MAC address to
566 * this interface, if it has the special null one.
568 if (dev
&& is_zero_ether_addr(dev
->dev_addr
)) {
569 memcpy(dev
->dev_addr
,
570 local
->hw
.wiphy
->perm_addr
,
572 memcpy(dev
->perm_addr
, dev
->dev_addr
, ETH_ALEN
);
574 if (!is_valid_ether_addr(dev
->dev_addr
)) {
575 res
= -EADDRNOTAVAIL
;
580 switch (sdata
->vif
.type
) {
581 case NL80211_IFTYPE_AP_VLAN
:
582 /* no need to tell driver, but set carrier and chanctx */
583 if (rtnl_dereference(sdata
->bss
->beacon
)) {
584 ieee80211_vif_vlan_copy_chanctx(sdata
);
585 netif_carrier_on(dev
);
587 netif_carrier_off(dev
);
590 case NL80211_IFTYPE_MONITOR
:
591 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
592 local
->cooked_mntrs
++;
596 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
) {
597 res
= drv_add_interface(local
, sdata
);
600 } else if (local
->monitors
== 0 && local
->open_count
== 0) {
601 res
= ieee80211_add_virtual_monitor(local
);
606 /* must be before the call to ieee80211_configure_filter */
608 if (local
->monitors
== 1) {
609 local
->hw
.conf
.flags
|= IEEE80211_CONF_MONITOR
;
610 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
613 ieee80211_adjust_monitor_flags(sdata
, 1);
614 ieee80211_configure_filter(local
);
615 mutex_lock(&local
->mtx
);
616 ieee80211_recalc_idle(local
);
617 mutex_unlock(&local
->mtx
);
619 netif_carrier_on(dev
);
623 ieee80211_del_virtual_monitor(local
);
625 res
= drv_add_interface(local
, sdata
);
628 res
= ieee80211_check_queues(sdata
,
629 ieee80211_vif_type_p2p(&sdata
->vif
));
631 goto err_del_interface
;
634 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
636 local
->fif_probe_req
++;
638 ieee80211_configure_filter(local
);
639 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
640 local
->fif_probe_req
++;
643 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
)
644 changed
|= ieee80211_reset_erp_info(sdata
);
645 ieee80211_bss_info_change_notify(sdata
, changed
);
647 switch (sdata
->vif
.type
) {
648 case NL80211_IFTYPE_STATION
:
649 case NL80211_IFTYPE_ADHOC
:
650 case NL80211_IFTYPE_AP
:
651 case NL80211_IFTYPE_MESH_POINT
:
652 case NL80211_IFTYPE_OCB
:
653 netif_carrier_off(dev
);
655 case NL80211_IFTYPE_WDS
:
656 case NL80211_IFTYPE_P2P_DEVICE
:
664 * set default queue parameters so drivers don't
665 * need to initialise the hardware if the hardware
666 * doesn't start up with sane defaults
668 ieee80211_set_wmm_default(sdata
, true);
671 set_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
673 if (sdata
->vif
.type
== NL80211_IFTYPE_WDS
) {
674 /* Create STA entry for the WDS peer */
675 sta
= sta_info_alloc(sdata
, sdata
->u
.wds
.remote_addr
,
679 goto err_del_interface
;
682 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTH
);
683 sta_info_pre_move_state(sta
, IEEE80211_STA_ASSOC
);
684 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
686 res
= sta_info_insert(sta
);
688 /* STA has been freed */
689 goto err_del_interface
;
692 rate_control_rate_init(sta
);
693 netif_carrier_on(dev
);
694 } else if (sdata
->vif
.type
== NL80211_IFTYPE_P2P_DEVICE
) {
695 rcu_assign_pointer(local
->p2p_sdata
, sdata
);
699 * set_multicast_list will be invoked by the networking core
700 * which will check whether any increments here were done in
701 * error and sync them down to the hardware as filter flags.
703 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
704 atomic_inc(&local
->iff_allmultis
);
710 ieee80211_hw_config(local
, hw_reconf_flags
);
712 ieee80211_recalc_ps(local
, -1);
714 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
715 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
716 /* XXX: for AP_VLAN, actually track AP queues */
717 netif_tx_start_all_queues(dev
);
720 int n_acs
= IEEE80211_NUM_ACS
;
723 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
726 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
727 if (sdata
->vif
.cab_queue
== IEEE80211_INVAL_HW_QUEUE
||
728 (local
->queue_stop_reasons
[sdata
->vif
.cab_queue
] == 0 &&
729 skb_queue_empty(&local
->pending
[sdata
->vif
.cab_queue
]))) {
730 for (ac
= 0; ac
< n_acs
; ac
++) {
731 int ac_queue
= sdata
->vif
.hw_queue
[ac
];
733 if (local
->queue_stop_reasons
[ac_queue
] == 0 &&
734 skb_queue_empty(&local
->pending
[ac_queue
]))
735 netif_start_subqueue(dev
, ac
);
738 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
743 drv_remove_interface(local
, sdata
);
745 if (!local
->open_count
)
749 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
750 mutex_lock(&local
->mtx
);
751 list_del(&sdata
->u
.vlan
.list
);
752 mutex_unlock(&local
->mtx
);
754 /* might already be clear but that doesn't matter */
755 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
759 static int ieee80211_open(struct net_device
*dev
)
761 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
764 /* fail early if user set an invalid address */
765 if (!is_valid_ether_addr(dev
->dev_addr
))
766 return -EADDRNOTAVAIL
;
768 err
= ieee80211_check_concurrent_iface(sdata
, sdata
->vif
.type
);
772 return ieee80211_do_open(&sdata
->wdev
, true);
775 static void ieee80211_do_stop(struct ieee80211_sub_if_data
*sdata
,
778 struct ieee80211_local
*local
= sdata
->local
;
780 struct sk_buff
*skb
, *tmp
;
781 u32 hw_reconf_flags
= 0;
784 struct cfg80211_chan_def chandef
;
787 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
789 cancel_scan
= rcu_access_pointer(local
->scan_sdata
) == sdata
;
791 ieee80211_scan_cancel(local
);
794 * Stop TX on this interface first.
797 netif_tx_stop_all_queues(sdata
->dev
);
799 ieee80211_roc_purge(local
, sdata
);
801 switch (sdata
->vif
.type
) {
802 case NL80211_IFTYPE_STATION
:
803 ieee80211_mgd_stop(sdata
);
805 case NL80211_IFTYPE_ADHOC
:
806 ieee80211_ibss_stop(sdata
);
808 case NL80211_IFTYPE_AP
:
809 cancel_work_sync(&sdata
->u
.ap
.request_smps_work
);
816 * Remove all stations associated with this interface.
818 * This must be done before calling ops->remove_interface()
819 * because otherwise we can later invoke ops->sta_notify()
820 * whenever the STAs are removed, and that invalidates driver
821 * assumptions about always getting a vif pointer that is valid
822 * (because if we remove a STA after ops->remove_interface()
823 * the driver will have removed the vif info already!)
825 * In WDS mode a station must exist here and be flushed, for
826 * AP_VLANs stations may exist since there's nothing else that
827 * would have removed them, but in other modes there shouldn't
830 flushed
= sta_info_flush(sdata
);
831 WARN_ON_ONCE(sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
832 ((sdata
->vif
.type
!= NL80211_IFTYPE_WDS
&& flushed
> 0) ||
833 (sdata
->vif
.type
== NL80211_IFTYPE_WDS
&& flushed
!= 1)));
835 /* don't count this interface for allmulti while it is down */
836 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
837 atomic_dec(&local
->iff_allmultis
);
839 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
841 local
->fif_probe_req
--;
842 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
843 local
->fif_probe_req
--;
847 netif_addr_lock_bh(sdata
->dev
);
848 spin_lock_bh(&local
->filter_lock
);
849 __hw_addr_unsync(&local
->mc_list
, &sdata
->dev
->mc
,
850 sdata
->dev
->addr_len
);
851 spin_unlock_bh(&local
->filter_lock
);
852 netif_addr_unlock_bh(sdata
->dev
);
855 del_timer_sync(&local
->dynamic_ps_timer
);
856 cancel_work_sync(&local
->dynamic_ps_enable_work
);
858 cancel_work_sync(&sdata
->recalc_smps
);
860 mutex_lock(&local
->mtx
);
861 sdata
->vif
.csa_active
= false;
862 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
863 sdata
->u
.mgd
.csa_waiting_bcn
= false;
864 if (sdata
->csa_block_tx
) {
865 ieee80211_wake_vif_queues(local
, sdata
,
866 IEEE80211_QUEUE_STOP_REASON_CSA
);
867 sdata
->csa_block_tx
= false;
869 mutex_unlock(&local
->mtx
);
872 cancel_work_sync(&sdata
->csa_finalize_work
);
874 cancel_delayed_work_sync(&sdata
->dfs_cac_timer_work
);
876 if (sdata
->wdev
.cac_started
) {
877 chandef
= sdata
->vif
.bss_conf
.chandef
;
878 WARN_ON(local
->suspended
);
879 mutex_lock(&local
->mtx
);
880 ieee80211_vif_release_channel(sdata
);
881 mutex_unlock(&local
->mtx
);
882 cfg80211_cac_event(sdata
->dev
, &chandef
,
883 NL80211_RADAR_CAC_ABORTED
,
887 /* APs need special treatment */
888 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
889 struct ieee80211_sub_if_data
*vlan
, *tmpsdata
;
891 /* down all dependent devices, that is VLANs */
892 list_for_each_entry_safe(vlan
, tmpsdata
, &sdata
->u
.ap
.vlans
,
894 dev_close(vlan
->dev
);
895 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
896 } else if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
897 /* remove all packets in parent bc_buf pointing to this dev */
898 ps
= &sdata
->bss
->ps
;
900 spin_lock_irqsave(&ps
->bc_buf
.lock
, flags
);
901 skb_queue_walk_safe(&ps
->bc_buf
, skb
, tmp
) {
902 if (skb
->dev
== sdata
->dev
) {
903 __skb_unlink(skb
, &ps
->bc_buf
);
904 local
->total_ps_buffered
--;
905 ieee80211_free_txskb(&local
->hw
, skb
);
908 spin_unlock_irqrestore(&ps
->bc_buf
.lock
, flags
);
914 switch (sdata
->vif
.type
) {
915 case NL80211_IFTYPE_AP_VLAN
:
916 mutex_lock(&local
->mtx
);
917 list_del(&sdata
->u
.vlan
.list
);
918 mutex_unlock(&local
->mtx
);
919 RCU_INIT_POINTER(sdata
->vif
.chanctx_conf
, NULL
);
920 /* see comment in the default case below */
921 ieee80211_free_keys(sdata
, true);
922 /* no need to tell driver */
924 case NL80211_IFTYPE_MONITOR
:
925 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
926 local
->cooked_mntrs
--;
931 if (local
->monitors
== 0) {
932 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_MONITOR
;
933 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
936 ieee80211_adjust_monitor_flags(sdata
, -1);
938 case NL80211_IFTYPE_P2P_DEVICE
:
939 /* relies on synchronize_rcu() below */
940 RCU_INIT_POINTER(local
->p2p_sdata
, NULL
);
943 cancel_work_sync(&sdata
->work
);
945 * When we get here, the interface is marked down.
946 * Free the remaining keys, if there are any
947 * (which can happen in AP mode if userspace sets
948 * keys before the interface is operating, and maybe
951 * Force the key freeing to always synchronize_net()
952 * to wait for the RX path in case it is using this
953 * interface enqueuing frames at this very time on
956 ieee80211_free_keys(sdata
, true);
957 skb_queue_purge(&sdata
->skb_queue
);
962 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
963 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
964 skb_queue_walk_safe(&local
->pending
[i
], skb
, tmp
) {
965 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
966 if (info
->control
.vif
== &sdata
->vif
) {
967 __skb_unlink(skb
, &local
->pending
[i
]);
968 ieee80211_free_txskb(&local
->hw
, skb
);
972 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
974 if (sdata
->vif
.txq
) {
975 struct txq_info
*txqi
= to_txq_info(sdata
->vif
.txq
);
977 ieee80211_purge_tx_queue(&local
->hw
, &txqi
->queue
);
978 atomic_set(&sdata
->txqs_len
[txqi
->txq
.ac
], 0);
981 if (local
->open_count
== 0)
982 ieee80211_clear_tx_pending(local
);
985 * If the interface goes down while suspended, presumably because
986 * the device was unplugged and that happens before our resume,
987 * then the driver is already unconfigured and the remainder of
988 * this function isn't needed.
989 * XXX: what about WoWLAN? If the device has software state, e.g.
990 * memory allocated, it might expect teardown commands from
993 if (local
->suspended
) {
994 WARN_ON(local
->wowlan
);
995 WARN_ON(rtnl_dereference(local
->monitor_sdata
));
999 switch (sdata
->vif
.type
) {
1000 case NL80211_IFTYPE_AP_VLAN
:
1002 case NL80211_IFTYPE_MONITOR
:
1003 if (local
->monitors
== 0)
1004 ieee80211_del_virtual_monitor(local
);
1006 mutex_lock(&local
->mtx
);
1007 ieee80211_recalc_idle(local
);
1008 mutex_unlock(&local
->mtx
);
1010 if (!(sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
))
1016 drv_remove_interface(local
, sdata
);
1019 ieee80211_recalc_ps(local
, -1);
1022 flush_delayed_work(&local
->scan_work
);
1024 if (local
->open_count
== 0) {
1025 ieee80211_stop_device(local
);
1027 /* no reconfiguring after stop! */
1031 /* do after stop to avoid reconfiguring when we stop anyway */
1032 ieee80211_configure_filter(local
);
1033 ieee80211_hw_config(local
, hw_reconf_flags
);
1035 if (local
->monitors
== local
->open_count
)
1036 ieee80211_add_virtual_monitor(local
);
1039 static int ieee80211_stop(struct net_device
*dev
)
1041 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1043 ieee80211_do_stop(sdata
, true);
1048 static void ieee80211_set_multicast_list(struct net_device
*dev
)
1050 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1051 struct ieee80211_local
*local
= sdata
->local
;
1052 int allmulti
, sdata_allmulti
;
1054 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
1055 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
1057 if (allmulti
!= sdata_allmulti
) {
1058 if (dev
->flags
& IFF_ALLMULTI
)
1059 atomic_inc(&local
->iff_allmultis
);
1061 atomic_dec(&local
->iff_allmultis
);
1062 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
1065 spin_lock_bh(&local
->filter_lock
);
1066 __hw_addr_sync(&local
->mc_list
, &dev
->mc
, dev
->addr_len
);
1067 spin_unlock_bh(&local
->filter_lock
);
1068 ieee80211_queue_work(&local
->hw
, &local
->reconfig_filter
);
1072 * Called when the netdev is removed or, by the code below, before
1073 * the interface type changes.
1075 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data
*sdata
)
1079 /* free extra data */
1080 ieee80211_free_keys(sdata
, false);
1082 ieee80211_debugfs_remove_netdev(sdata
);
1084 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
1085 __skb_queue_purge(&sdata
->fragments
[i
].skb_list
);
1086 sdata
->fragment_next
= 0;
1088 if (ieee80211_vif_is_mesh(&sdata
->vif
))
1089 mesh_rmc_free(sdata
);
1092 static void ieee80211_uninit(struct net_device
*dev
)
1094 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev
));
1097 static u16
ieee80211_netdev_select_queue(struct net_device
*dev
,
1098 struct sk_buff
*skb
,
1100 select_queue_fallback_t fallback
)
1102 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev
), skb
);
1105 static struct rtnl_link_stats64
*
1106 ieee80211_get_stats64(struct net_device
*dev
, struct rtnl_link_stats64
*stats
)
1110 for_each_possible_cpu(i
) {
1111 const struct pcpu_sw_netstats
*tstats
;
1112 u64 rx_packets
, rx_bytes
, tx_packets
, tx_bytes
;
1115 tstats
= per_cpu_ptr(dev
->tstats
, i
);
1118 start
= u64_stats_fetch_begin_irq(&tstats
->syncp
);
1119 rx_packets
= tstats
->rx_packets
;
1120 tx_packets
= tstats
->tx_packets
;
1121 rx_bytes
= tstats
->rx_bytes
;
1122 tx_bytes
= tstats
->tx_bytes
;
1123 } while (u64_stats_fetch_retry_irq(&tstats
->syncp
, start
));
1125 stats
->rx_packets
+= rx_packets
;
1126 stats
->tx_packets
+= tx_packets
;
1127 stats
->rx_bytes
+= rx_bytes
;
1128 stats
->tx_bytes
+= tx_bytes
;
1134 static const struct net_device_ops ieee80211_dataif_ops
= {
1135 .ndo_open
= ieee80211_open
,
1136 .ndo_stop
= ieee80211_stop
,
1137 .ndo_uninit
= ieee80211_uninit
,
1138 .ndo_start_xmit
= ieee80211_subif_start_xmit
,
1139 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
1140 .ndo_change_mtu
= ieee80211_change_mtu
,
1141 .ndo_set_mac_address
= ieee80211_change_mac
,
1142 .ndo_select_queue
= ieee80211_netdev_select_queue
,
1143 .ndo_get_stats64
= ieee80211_get_stats64
,
1146 static u16
ieee80211_monitor_select_queue(struct net_device
*dev
,
1147 struct sk_buff
*skb
,
1149 select_queue_fallback_t fallback
)
1151 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1152 struct ieee80211_local
*local
= sdata
->local
;
1153 struct ieee80211_hdr
*hdr
;
1154 struct ieee80211_radiotap_header
*rtap
= (void *)skb
->data
;
1156 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1160 skb
->len
< le16_to_cpu(rtap
->it_len
) + 2 /* frame control */)
1161 return 0; /* doesn't matter, frame will be dropped */
1163 hdr
= (void *)((u8
*)skb
->data
+ le16_to_cpu(rtap
->it_len
));
1165 return ieee80211_select_queue_80211(sdata
, skb
, hdr
);
1168 static const struct net_device_ops ieee80211_monitorif_ops
= {
1169 .ndo_open
= ieee80211_open
,
1170 .ndo_stop
= ieee80211_stop
,
1171 .ndo_uninit
= ieee80211_uninit
,
1172 .ndo_start_xmit
= ieee80211_monitor_start_xmit
,
1173 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
1174 .ndo_change_mtu
= ieee80211_change_mtu
,
1175 .ndo_set_mac_address
= ieee80211_change_mac
,
1176 .ndo_select_queue
= ieee80211_monitor_select_queue
,
1177 .ndo_get_stats64
= ieee80211_get_stats64
,
1180 static void ieee80211_if_free(struct net_device
*dev
)
1182 free_percpu(dev
->tstats
);
1186 static void ieee80211_if_setup(struct net_device
*dev
)
1189 dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1190 dev
->netdev_ops
= &ieee80211_dataif_ops
;
1191 dev
->destructor
= ieee80211_if_free
;
1194 static void ieee80211_iface_work(struct work_struct
*work
)
1196 struct ieee80211_sub_if_data
*sdata
=
1197 container_of(work
, struct ieee80211_sub_if_data
, work
);
1198 struct ieee80211_local
*local
= sdata
->local
;
1199 struct sk_buff
*skb
;
1200 struct sta_info
*sta
;
1201 struct ieee80211_ra_tid
*ra_tid
;
1202 struct ieee80211_rx_agg
*rx_agg
;
1204 if (!ieee80211_sdata_running(sdata
))
1207 if (local
->scanning
)
1210 if (!ieee80211_can_run_worker(local
))
1213 /* first process frames */
1214 while ((skb
= skb_dequeue(&sdata
->skb_queue
))) {
1215 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
1217 if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_START
) {
1218 ra_tid
= (void *)&skb
->cb
;
1219 ieee80211_start_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
1221 } else if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_STOP
) {
1222 ra_tid
= (void *)&skb
->cb
;
1223 ieee80211_stop_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
1225 } else if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_RX_AGG_START
) {
1226 rx_agg
= (void *)&skb
->cb
;
1227 mutex_lock(&local
->sta_mtx
);
1228 sta
= sta_info_get_bss(sdata
, rx_agg
->addr
);
1230 __ieee80211_start_rx_ba_session(sta
,
1231 0, 0, 0, 1, rx_agg
->tid
,
1232 IEEE80211_MAX_AMPDU_BUF
,
1234 mutex_unlock(&local
->sta_mtx
);
1235 } else if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_RX_AGG_STOP
) {
1236 rx_agg
= (void *)&skb
->cb
;
1237 mutex_lock(&local
->sta_mtx
);
1238 sta
= sta_info_get_bss(sdata
, rx_agg
->addr
);
1240 __ieee80211_stop_rx_ba_session(sta
,
1242 WLAN_BACK_RECIPIENT
, 0,
1244 mutex_unlock(&local
->sta_mtx
);
1245 } else if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_TDLS_CHSW
) {
1246 ieee80211_process_tdls_channel_switch(sdata
, skb
);
1247 } else if (ieee80211_is_action(mgmt
->frame_control
) &&
1248 mgmt
->u
.action
.category
== WLAN_CATEGORY_BACK
) {
1251 mutex_lock(&local
->sta_mtx
);
1252 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
1254 switch (mgmt
->u
.action
.u
.addba_req
.action_code
) {
1255 case WLAN_ACTION_ADDBA_REQ
:
1256 ieee80211_process_addba_request(
1257 local
, sta
, mgmt
, len
);
1259 case WLAN_ACTION_ADDBA_RESP
:
1260 ieee80211_process_addba_resp(local
, sta
,
1263 case WLAN_ACTION_DELBA
:
1264 ieee80211_process_delba(sdata
, sta
,
1272 mutex_unlock(&local
->sta_mtx
);
1273 } else if (ieee80211_is_data_qos(mgmt
->frame_control
)) {
1274 struct ieee80211_hdr
*hdr
= (void *)mgmt
;
1276 * So the frame isn't mgmt, but frame_control
1277 * is at the right place anyway, of course, so
1278 * the if statement is correct.
1280 * Warn if we have other data frame types here,
1281 * they must not get here.
1283 WARN_ON(hdr
->frame_control
&
1284 cpu_to_le16(IEEE80211_STYPE_NULLFUNC
));
1285 WARN_ON(!(hdr
->seq_ctrl
&
1286 cpu_to_le16(IEEE80211_SCTL_FRAG
)));
1288 * This was a fragment of a frame, received while
1289 * a block-ack session was active. That cannot be
1290 * right, so terminate the session.
1292 mutex_lock(&local
->sta_mtx
);
1293 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
1295 u16 tid
= *ieee80211_get_qos_ctl(hdr
) &
1296 IEEE80211_QOS_CTL_TID_MASK
;
1298 __ieee80211_stop_rx_ba_session(
1299 sta
, tid
, WLAN_BACK_RECIPIENT
,
1300 WLAN_REASON_QSTA_REQUIRE_SETUP
,
1303 mutex_unlock(&local
->sta_mtx
);
1304 } else switch (sdata
->vif
.type
) {
1305 case NL80211_IFTYPE_STATION
:
1306 ieee80211_sta_rx_queued_mgmt(sdata
, skb
);
1308 case NL80211_IFTYPE_ADHOC
:
1309 ieee80211_ibss_rx_queued_mgmt(sdata
, skb
);
1311 case NL80211_IFTYPE_MESH_POINT
:
1312 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
1314 ieee80211_mesh_rx_queued_mgmt(sdata
, skb
);
1317 WARN(1, "frame for unexpected interface type");
1324 /* then other type-dependent work */
1325 switch (sdata
->vif
.type
) {
1326 case NL80211_IFTYPE_STATION
:
1327 ieee80211_sta_work(sdata
);
1329 case NL80211_IFTYPE_ADHOC
:
1330 ieee80211_ibss_work(sdata
);
1332 case NL80211_IFTYPE_MESH_POINT
:
1333 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
1335 ieee80211_mesh_work(sdata
);
1337 case NL80211_IFTYPE_OCB
:
1338 ieee80211_ocb_work(sdata
);
1345 static void ieee80211_recalc_smps_work(struct work_struct
*work
)
1347 struct ieee80211_sub_if_data
*sdata
=
1348 container_of(work
, struct ieee80211_sub_if_data
, recalc_smps
);
1350 ieee80211_recalc_smps(sdata
);
1354 * Helper function to initialise an interface to a specific type.
1356 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data
*sdata
,
1357 enum nl80211_iftype type
)
1359 static const u8 bssid_wildcard
[ETH_ALEN
] = {0xff, 0xff, 0xff,
1362 /* clear type-dependent union */
1363 memset(&sdata
->u
, 0, sizeof(sdata
->u
));
1365 /* and set some type-dependent values */
1366 sdata
->vif
.type
= type
;
1367 sdata
->vif
.p2p
= false;
1368 sdata
->wdev
.iftype
= type
;
1370 sdata
->control_port_protocol
= cpu_to_be16(ETH_P_PAE
);
1371 sdata
->control_port_no_encrypt
= false;
1372 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
1373 sdata
->vif
.bss_conf
.idle
= true;
1375 sdata
->noack_map
= 0;
1377 /* only monitor/p2p-device differ */
1379 sdata
->dev
->netdev_ops
= &ieee80211_dataif_ops
;
1380 sdata
->dev
->type
= ARPHRD_ETHER
;
1383 skb_queue_head_init(&sdata
->skb_queue
);
1384 INIT_WORK(&sdata
->work
, ieee80211_iface_work
);
1385 INIT_WORK(&sdata
->recalc_smps
, ieee80211_recalc_smps_work
);
1386 INIT_WORK(&sdata
->csa_finalize_work
, ieee80211_csa_finalize_work
);
1387 INIT_LIST_HEAD(&sdata
->assigned_chanctx_list
);
1388 INIT_LIST_HEAD(&sdata
->reserved_chanctx_list
);
1391 case NL80211_IFTYPE_P2P_GO
:
1392 type
= NL80211_IFTYPE_AP
;
1393 sdata
->vif
.type
= type
;
1394 sdata
->vif
.p2p
= true;
1396 case NL80211_IFTYPE_AP
:
1397 skb_queue_head_init(&sdata
->u
.ap
.ps
.bc_buf
);
1398 INIT_LIST_HEAD(&sdata
->u
.ap
.vlans
);
1399 INIT_WORK(&sdata
->u
.ap
.request_smps_work
,
1400 ieee80211_request_smps_ap_work
);
1401 sdata
->vif
.bss_conf
.bssid
= sdata
->vif
.addr
;
1402 sdata
->u
.ap
.req_smps
= IEEE80211_SMPS_OFF
;
1404 case NL80211_IFTYPE_P2P_CLIENT
:
1405 type
= NL80211_IFTYPE_STATION
;
1406 sdata
->vif
.type
= type
;
1407 sdata
->vif
.p2p
= true;
1409 case NL80211_IFTYPE_STATION
:
1410 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.mgd
.bssid
;
1411 ieee80211_sta_setup_sdata(sdata
);
1413 case NL80211_IFTYPE_OCB
:
1414 sdata
->vif
.bss_conf
.bssid
= bssid_wildcard
;
1415 ieee80211_ocb_setup_sdata(sdata
);
1417 case NL80211_IFTYPE_ADHOC
:
1418 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.ibss
.bssid
;
1419 ieee80211_ibss_setup_sdata(sdata
);
1421 case NL80211_IFTYPE_MESH_POINT
:
1422 if (ieee80211_vif_is_mesh(&sdata
->vif
))
1423 ieee80211_mesh_init_sdata(sdata
);
1425 case NL80211_IFTYPE_MONITOR
:
1426 sdata
->dev
->type
= ARPHRD_IEEE80211_RADIOTAP
;
1427 sdata
->dev
->netdev_ops
= &ieee80211_monitorif_ops
;
1428 sdata
->u
.mntr_flags
= MONITOR_FLAG_CONTROL
|
1429 MONITOR_FLAG_OTHER_BSS
;
1431 case NL80211_IFTYPE_WDS
:
1432 sdata
->vif
.bss_conf
.bssid
= NULL
;
1434 case NL80211_IFTYPE_AP_VLAN
:
1435 case NL80211_IFTYPE_P2P_DEVICE
:
1436 sdata
->vif
.bss_conf
.bssid
= sdata
->vif
.addr
;
1438 case NL80211_IFTYPE_UNSPECIFIED
:
1439 case NUM_NL80211_IFTYPES
:
1444 ieee80211_debugfs_add_netdev(sdata
);
1447 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data
*sdata
,
1448 enum nl80211_iftype type
)
1450 struct ieee80211_local
*local
= sdata
->local
;
1452 enum nl80211_iftype internal_type
= type
;
1457 if (!local
->ops
->change_interface
)
1460 switch (sdata
->vif
.type
) {
1461 case NL80211_IFTYPE_AP
:
1462 case NL80211_IFTYPE_STATION
:
1463 case NL80211_IFTYPE_ADHOC
:
1464 case NL80211_IFTYPE_OCB
:
1466 * Could maybe also all others here?
1467 * Just not sure how that interacts
1468 * with the RX/config path e.g. for
1477 case NL80211_IFTYPE_AP
:
1478 case NL80211_IFTYPE_STATION
:
1479 case NL80211_IFTYPE_ADHOC
:
1480 case NL80211_IFTYPE_OCB
:
1482 * Could probably support everything
1483 * but WDS here (WDS do_open can fail
1484 * under memory pressure, which this
1485 * code isn't prepared to handle).
1488 case NL80211_IFTYPE_P2P_CLIENT
:
1490 internal_type
= NL80211_IFTYPE_STATION
;
1492 case NL80211_IFTYPE_P2P_GO
:
1494 internal_type
= NL80211_IFTYPE_AP
;
1500 ret
= ieee80211_check_concurrent_iface(sdata
, internal_type
);
1504 ieee80211_do_stop(sdata
, false);
1506 ieee80211_teardown_sdata(sdata
);
1508 ret
= drv_change_interface(local
, sdata
, internal_type
, p2p
);
1510 type
= ieee80211_vif_type_p2p(&sdata
->vif
);
1513 * Ignore return value here, there's not much we can do since
1514 * the driver changed the interface type internally already.
1515 * The warnings will hopefully make driver authors fix it :-)
1517 ieee80211_check_queues(sdata
, type
);
1519 ieee80211_setup_sdata(sdata
, type
);
1521 err
= ieee80211_do_open(&sdata
->wdev
, false);
1522 WARN(err
, "type change: do_open returned %d", err
);
1527 int ieee80211_if_change_type(struct ieee80211_sub_if_data
*sdata
,
1528 enum nl80211_iftype type
)
1534 if (type
== ieee80211_vif_type_p2p(&sdata
->vif
))
1537 if (ieee80211_sdata_running(sdata
)) {
1538 ret
= ieee80211_runtime_change_iftype(sdata
, type
);
1542 /* Purge and reset type-dependent state. */
1543 ieee80211_teardown_sdata(sdata
);
1544 ieee80211_setup_sdata(sdata
, type
);
1547 /* reset some values that shouldn't be kept across type changes */
1548 if (type
== NL80211_IFTYPE_STATION
)
1549 sdata
->u
.mgd
.use_4addr
= false;
1554 static void ieee80211_assign_perm_addr(struct ieee80211_local
*local
,
1555 u8
*perm_addr
, enum nl80211_iftype type
)
1557 struct ieee80211_sub_if_data
*sdata
;
1558 u64 mask
, start
, addr
, val
, inc
;
1560 u8 tmp_addr
[ETH_ALEN
];
1563 /* default ... something at least */
1564 memcpy(perm_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
1566 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
) &&
1567 local
->hw
.wiphy
->n_addresses
<= 1)
1570 mutex_lock(&local
->iflist_mtx
);
1573 case NL80211_IFTYPE_MONITOR
:
1574 /* doesn't matter */
1576 case NL80211_IFTYPE_WDS
:
1577 case NL80211_IFTYPE_AP_VLAN
:
1578 /* match up with an AP interface */
1579 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1580 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
1582 memcpy(perm_addr
, sdata
->vif
.addr
, ETH_ALEN
);
1585 /* keep default if no AP interface present */
1587 case NL80211_IFTYPE_P2P_CLIENT
:
1588 case NL80211_IFTYPE_P2P_GO
:
1589 if (ieee80211_hw_check(&local
->hw
, P2P_DEV_ADDR_FOR_INTF
)) {
1590 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1591 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
)
1593 if (!ieee80211_sdata_running(sdata
))
1595 memcpy(perm_addr
, sdata
->vif
.addr
, ETH_ALEN
);
1599 /* otherwise fall through */
1601 /* assign a new address if possible -- try n_addresses first */
1602 for (i
= 0; i
< local
->hw
.wiphy
->n_addresses
; i
++) {
1605 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1606 if (ether_addr_equal(local
->hw
.wiphy
->addresses
[i
].addr
,
1615 local
->hw
.wiphy
->addresses
[i
].addr
,
1621 /* try mask if available */
1622 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
))
1625 m
= local
->hw
.wiphy
->addr_mask
;
1626 mask
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1627 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1628 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1630 if (__ffs64(mask
) + hweight64(mask
) != fls64(mask
)) {
1631 /* not a contiguous mask ... not handled now! */
1632 pr_info("not contiguous\n");
1637 * Pick address of existing interface in case user changed
1638 * MAC address manually, default to perm_addr.
1640 m
= local
->hw
.wiphy
->perm_addr
;
1641 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1642 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
)
1644 m
= sdata
->vif
.addr
;
1647 start
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1648 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1649 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1651 inc
= 1ULL<<__ffs64(mask
);
1652 val
= (start
& mask
);
1653 addr
= (start
& ~mask
) | (val
& mask
);
1657 tmp_addr
[5] = addr
>> 0*8;
1658 tmp_addr
[4] = addr
>> 1*8;
1659 tmp_addr
[3] = addr
>> 2*8;
1660 tmp_addr
[2] = addr
>> 3*8;
1661 tmp_addr
[1] = addr
>> 4*8;
1662 tmp_addr
[0] = addr
>> 5*8;
1666 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1667 if (ether_addr_equal(tmp_addr
, sdata
->vif
.addr
)) {
1674 memcpy(perm_addr
, tmp_addr
, ETH_ALEN
);
1677 addr
= (start
& ~mask
) | (val
& mask
);
1678 } while (addr
!= start
);
1684 mutex_unlock(&local
->iflist_mtx
);
1687 int ieee80211_if_add(struct ieee80211_local
*local
, const char *name
,
1688 unsigned char name_assign_type
,
1689 struct wireless_dev
**new_wdev
, enum nl80211_iftype type
,
1690 struct vif_params
*params
)
1692 struct net_device
*ndev
= NULL
;
1693 struct ieee80211_sub_if_data
*sdata
= NULL
;
1694 struct txq_info
*txqi
;
1700 if (type
== NL80211_IFTYPE_P2P_DEVICE
) {
1701 struct wireless_dev
*wdev
;
1703 sdata
= kzalloc(sizeof(*sdata
) + local
->hw
.vif_data_size
,
1707 wdev
= &sdata
->wdev
;
1710 strlcpy(sdata
->name
, name
, IFNAMSIZ
);
1711 ieee80211_assign_perm_addr(local
, wdev
->address
, type
);
1712 memcpy(sdata
->vif
.addr
, wdev
->address
, ETH_ALEN
);
1714 int size
= ALIGN(sizeof(*sdata
) + local
->hw
.vif_data_size
,
1718 if (local
->ops
->wake_tx_queue
)
1719 txq_size
+= sizeof(struct txq_info
) +
1720 local
->hw
.txq_data_size
;
1722 if (local
->hw
.queues
>= IEEE80211_NUM_ACS
)
1723 txqs
= IEEE80211_NUM_ACS
;
1725 ndev
= alloc_netdev_mqs(size
+ txq_size
,
1726 name
, name_assign_type
,
1727 ieee80211_if_setup
, txqs
, 1);
1730 dev_net_set(ndev
, wiphy_net(local
->hw
.wiphy
));
1732 ndev
->tstats
= netdev_alloc_pcpu_stats(struct pcpu_sw_netstats
);
1733 if (!ndev
->tstats
) {
1738 ndev
->needed_headroom
= local
->tx_headroom
+
1739 4*6 /* four MAC addresses */
1740 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1742 + 8 /* rfc1042/bridge tunnel */
1743 - ETH_HLEN
/* ethernet hard_header_len */
1744 + IEEE80211_ENCRYPT_HEADROOM
;
1745 ndev
->needed_tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
1747 ret
= dev_alloc_name(ndev
, ndev
->name
);
1753 ieee80211_assign_perm_addr(local
, ndev
->perm_addr
, type
);
1754 if (params
&& is_valid_ether_addr(params
->macaddr
))
1755 memcpy(ndev
->dev_addr
, params
->macaddr
, ETH_ALEN
);
1757 memcpy(ndev
->dev_addr
, ndev
->perm_addr
, ETH_ALEN
);
1758 SET_NETDEV_DEV(ndev
, wiphy_dev(local
->hw
.wiphy
));
1760 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1761 sdata
= netdev_priv(ndev
);
1762 ndev
->ieee80211_ptr
= &sdata
->wdev
;
1763 memcpy(sdata
->vif
.addr
, ndev
->dev_addr
, ETH_ALEN
);
1764 memcpy(sdata
->name
, ndev
->name
, IFNAMSIZ
);
1767 txqi
= netdev_priv(ndev
) + size
;
1768 ieee80211_init_tx_queue(sdata
, NULL
, txqi
, 0);
1774 /* initialise type-independent data */
1775 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
1776 sdata
->local
= local
;
1778 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
1779 skb_queue_head_init(&sdata
->fragments
[i
].skb_list
);
1781 INIT_LIST_HEAD(&sdata
->key_list
);
1783 INIT_DELAYED_WORK(&sdata
->dfs_cac_timer_work
,
1784 ieee80211_dfs_cac_timer_work
);
1785 INIT_DELAYED_WORK(&sdata
->dec_tailroom_needed_wk
,
1786 ieee80211_delayed_tailroom_dec
);
1788 for (i
= 0; i
< IEEE80211_NUM_BANDS
; i
++) {
1789 struct ieee80211_supported_band
*sband
;
1790 sband
= local
->hw
.wiphy
->bands
[i
];
1791 sdata
->rc_rateidx_mask
[i
] =
1792 sband
? (1 << sband
->n_bitrates
) - 1 : 0;
1794 memcpy(sdata
->rc_rateidx_mcs_mask
[i
],
1795 sband
->ht_cap
.mcs
.rx_mask
,
1796 sizeof(sdata
->rc_rateidx_mcs_mask
[i
]));
1798 memset(sdata
->rc_rateidx_mcs_mask
[i
], 0,
1799 sizeof(sdata
->rc_rateidx_mcs_mask
[i
]));
1802 ieee80211_set_default_queues(sdata
);
1804 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
1805 sdata
->user_power_level
= local
->user_power_level
;
1807 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
1809 /* setup type-dependent data */
1810 ieee80211_setup_sdata(sdata
, type
);
1814 ndev
->ieee80211_ptr
->use_4addr
= params
->use_4addr
;
1815 if (type
== NL80211_IFTYPE_STATION
)
1816 sdata
->u
.mgd
.use_4addr
= params
->use_4addr
;
1819 ndev
->features
|= local
->hw
.netdev_features
;
1821 netdev_set_default_ethtool_ops(ndev
, &ieee80211_ethtool_ops
);
1823 ret
= register_netdevice(ndev
);
1830 mutex_lock(&local
->iflist_mtx
);
1831 list_add_tail_rcu(&sdata
->list
, &local
->interfaces
);
1832 mutex_unlock(&local
->iflist_mtx
);
1835 *new_wdev
= &sdata
->wdev
;
1840 void ieee80211_if_remove(struct ieee80211_sub_if_data
*sdata
)
1844 mutex_lock(&sdata
->local
->iflist_mtx
);
1845 list_del_rcu(&sdata
->list
);
1846 mutex_unlock(&sdata
->local
->iflist_mtx
);
1851 unregister_netdevice(sdata
->dev
);
1853 cfg80211_unregister_wdev(&sdata
->wdev
);
1858 void ieee80211_sdata_stop(struct ieee80211_sub_if_data
*sdata
)
1860 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING
, &sdata
->state
)))
1862 ieee80211_do_stop(sdata
, true);
1863 ieee80211_teardown_sdata(sdata
);
1867 * Remove all interfaces, may only be called at hardware unregistration
1868 * time because it doesn't do RCU-safe list removals.
1870 void ieee80211_remove_interfaces(struct ieee80211_local
*local
)
1872 struct ieee80211_sub_if_data
*sdata
, *tmp
;
1873 LIST_HEAD(unreg_list
);
1874 LIST_HEAD(wdev_list
);
1879 * Close all AP_VLAN interfaces first, as otherwise they
1880 * might be closed while the AP interface they belong to
1881 * is closed, causing unregister_netdevice_many() to crash.
1883 list_for_each_entry(sdata
, &local
->interfaces
, list
)
1884 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
1885 dev_close(sdata
->dev
);
1887 mutex_lock(&local
->iflist_mtx
);
1888 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
1889 list_del(&sdata
->list
);
1892 unregister_netdevice_queue(sdata
->dev
, &unreg_list
);
1894 list_add(&sdata
->list
, &wdev_list
);
1896 mutex_unlock(&local
->iflist_mtx
);
1897 unregister_netdevice_many(&unreg_list
);
1899 list_for_each_entry_safe(sdata
, tmp
, &wdev_list
, list
) {
1900 list_del(&sdata
->list
);
1901 cfg80211_unregister_wdev(&sdata
->wdev
);
1906 static int netdev_notify(struct notifier_block
*nb
,
1907 unsigned long state
, void *ptr
)
1909 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
1910 struct ieee80211_sub_if_data
*sdata
;
1912 if (state
!= NETDEV_CHANGENAME
)
1915 if (!dev
->ieee80211_ptr
|| !dev
->ieee80211_ptr
->wiphy
)
1918 if (dev
->ieee80211_ptr
->wiphy
->privid
!= mac80211_wiphy_privid
)
1921 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1922 memcpy(sdata
->name
, dev
->name
, IFNAMSIZ
);
1923 ieee80211_debugfs_rename_netdev(sdata
);
1928 static struct notifier_block mac80211_netdev_notifier
= {
1929 .notifier_call
= netdev_notify
,
1932 int ieee80211_iface_init(void)
1934 return register_netdevice_notifier(&mac80211_netdev_notifier
);
1937 void ieee80211_iface_exit(void)
1939 unregister_netdevice_notifier(&mac80211_netdev_notifier
);