4 * Copyright 2002-2005, Instant802 Networks, Inc.
5 * Copyright 2005-2006, Devicescape Software, Inc.
6 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
13 #include <linux/slab.h>
14 #include <linux/kernel.h>
15 #include <linux/if_arp.h>
16 #include <linux/netdevice.h>
17 #include <linux/rtnetlink.h>
18 #include <net/mac80211.h>
19 #include <net/ieee80211_radiotap.h>
20 #include "ieee80211_i.h"
22 #include "debugfs_netdev.h"
25 #include "driver-ops.h"
30 * DOC: Interface list locking
32 * The interface list in each struct ieee80211_local is protected
35 * (1) modifications may only be done under the RTNL
36 * (2) modifications and readers are protected against each other by
38 * (3) modifications are done in an RCU manner so atomic readers
39 * can traverse the list in RCU-safe blocks.
41 * As a consequence, reads (traversals) of the list can be protected
42 * by either the RTNL, the iflist_mtx or RCU.
45 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data
*sdata
)
47 struct ieee80211_chanctx_conf
*chanctx_conf
;
51 chanctx_conf
= rcu_dereference(sdata
->vif
.chanctx_conf
);
57 power
= ieee80211_chandef_max_power(&chanctx_conf
->def
);
60 if (sdata
->user_power_level
!= IEEE80211_UNSET_POWER_LEVEL
)
61 power
= min(power
, sdata
->user_power_level
);
63 if (sdata
->ap_power_level
!= IEEE80211_UNSET_POWER_LEVEL
)
64 power
= min(power
, sdata
->ap_power_level
);
66 if (power
!= sdata
->vif
.bss_conf
.txpower
) {
67 sdata
->vif
.bss_conf
.txpower
= power
;
68 ieee80211_hw_config(sdata
->local
, 0);
75 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data
*sdata
)
77 if (__ieee80211_recalc_txpower(sdata
))
78 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_TXPOWER
);
81 static u32
__ieee80211_idle_off(struct ieee80211_local
*local
)
83 if (!(local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
))
86 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_IDLE
;
87 return IEEE80211_CONF_CHANGE_IDLE
;
90 static u32
__ieee80211_idle_on(struct ieee80211_local
*local
)
92 if (local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
)
95 ieee80211_flush_queues(local
, NULL
);
97 local
->hw
.conf
.flags
|= IEEE80211_CONF_IDLE
;
98 return IEEE80211_CONF_CHANGE_IDLE
;
101 static u32
__ieee80211_recalc_idle(struct ieee80211_local
*local
,
104 bool working
= false, scanning
, active
;
105 unsigned int led_trig_start
= 0, led_trig_stop
= 0;
106 struct ieee80211_roc_work
*roc
;
108 lockdep_assert_held(&local
->mtx
);
110 active
= force_active
||
111 !list_empty(&local
->chanctx_list
) ||
114 if (!local
->ops
->remain_on_channel
) {
115 list_for_each_entry(roc
, &local
->roc_list
, list
) {
121 scanning
= test_bit(SCAN_SW_SCANNING
, &local
->scanning
) ||
122 test_bit(SCAN_ONCHANNEL_SCANNING
, &local
->scanning
);
124 if (working
|| scanning
)
125 led_trig_start
|= IEEE80211_TPT_LEDTRIG_FL_WORK
;
127 led_trig_stop
|= IEEE80211_TPT_LEDTRIG_FL_WORK
;
130 led_trig_start
|= IEEE80211_TPT_LEDTRIG_FL_CONNECTED
;
132 led_trig_stop
|= IEEE80211_TPT_LEDTRIG_FL_CONNECTED
;
134 ieee80211_mod_tpt_led_trig(local
, led_trig_start
, led_trig_stop
);
136 if (working
|| scanning
|| active
)
137 return __ieee80211_idle_off(local
);
138 return __ieee80211_idle_on(local
);
141 u32
ieee80211_idle_off(struct ieee80211_local
*local
)
143 return __ieee80211_recalc_idle(local
, true);
146 void ieee80211_recalc_idle(struct ieee80211_local
*local
)
148 u32 change
= __ieee80211_recalc_idle(local
, false);
150 ieee80211_hw_config(local
, change
);
153 static int ieee80211_change_mtu(struct net_device
*dev
, int new_mtu
)
155 if (new_mtu
< 256 || new_mtu
> IEEE80211_MAX_DATA_LEN
)
162 static int ieee80211_verify_mac(struct ieee80211_sub_if_data
*sdata
, u8
*addr
,
165 struct ieee80211_local
*local
= sdata
->local
;
166 struct ieee80211_sub_if_data
*iter
;
171 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
))
175 new = ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
176 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
177 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
179 m
= local
->hw
.wiphy
->addr_mask
;
180 mask
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
181 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
182 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
187 mutex_lock(&local
->iflist_mtx
);
188 list_for_each_entry(iter
, &local
->interfaces
, list
) {
192 if (iter
->vif
.type
== NL80211_IFTYPE_MONITOR
&&
193 !(iter
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
))
197 tmp
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
198 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
199 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
201 if ((new & ~mask
) != (tmp
& ~mask
)) {
206 mutex_unlock(&local
->iflist_mtx
);
211 static int ieee80211_change_mac(struct net_device
*dev
, void *addr
)
213 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
214 struct sockaddr
*sa
= addr
;
215 bool check_dup
= true;
218 if (ieee80211_sdata_running(sdata
))
221 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
&&
222 !(sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
))
225 ret
= ieee80211_verify_mac(sdata
, sa
->sa_data
, check_dup
);
229 ret
= eth_mac_addr(dev
, sa
);
232 memcpy(sdata
->vif
.addr
, sa
->sa_data
, ETH_ALEN
);
237 static inline int identical_mac_addr_allowed(int type1
, int type2
)
239 return type1
== NL80211_IFTYPE_MONITOR
||
240 type2
== NL80211_IFTYPE_MONITOR
||
241 type1
== NL80211_IFTYPE_P2P_DEVICE
||
242 type2
== NL80211_IFTYPE_P2P_DEVICE
||
243 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_WDS
) ||
244 (type1
== NL80211_IFTYPE_WDS
&&
245 (type2
== NL80211_IFTYPE_WDS
||
246 type2
== NL80211_IFTYPE_AP
)) ||
247 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_AP_VLAN
) ||
248 (type1
== NL80211_IFTYPE_AP_VLAN
&&
249 (type2
== NL80211_IFTYPE_AP
||
250 type2
== NL80211_IFTYPE_AP_VLAN
));
253 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data
*sdata
,
254 enum nl80211_iftype iftype
)
256 struct ieee80211_local
*local
= sdata
->local
;
257 struct ieee80211_sub_if_data
*nsdata
;
261 /* we hold the RTNL here so can safely walk the list */
262 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
263 if (nsdata
!= sdata
&& ieee80211_sdata_running(nsdata
)) {
265 * Allow only a single IBSS interface to be up at any
266 * time. This is restricted because beacon distribution
267 * cannot work properly if both are in the same IBSS.
269 * To remove this restriction we'd have to disallow them
270 * from setting the same SSID on different IBSS interfaces
271 * belonging to the same hardware. Then, however, we're
272 * faced with having to adopt two different TSF timers...
274 if (iftype
== NL80211_IFTYPE_ADHOC
&&
275 nsdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
278 * will not add another interface while any channel
281 if (nsdata
->vif
.csa_active
)
285 * The remaining checks are only performed for interfaces
286 * with the same MAC address.
288 if (!ether_addr_equal(sdata
->vif
.addr
,
293 * check whether it may have the same address
295 if (!identical_mac_addr_allowed(iftype
,
300 * can only add VLANs to enabled APs
302 if (iftype
== NL80211_IFTYPE_AP_VLAN
&&
303 nsdata
->vif
.type
== NL80211_IFTYPE_AP
)
304 sdata
->bss
= &nsdata
->u
.ap
;
311 static int ieee80211_check_queues(struct ieee80211_sub_if_data
*sdata
,
312 enum nl80211_iftype iftype
)
314 int n_queues
= sdata
->local
->hw
.queues
;
317 if (iftype
!= NL80211_IFTYPE_P2P_DEVICE
) {
318 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
319 if (WARN_ON_ONCE(sdata
->vif
.hw_queue
[i
] ==
320 IEEE80211_INVAL_HW_QUEUE
))
322 if (WARN_ON_ONCE(sdata
->vif
.hw_queue
[i
] >=
328 if ((iftype
!= NL80211_IFTYPE_AP
&&
329 iftype
!= NL80211_IFTYPE_P2P_GO
&&
330 iftype
!= NL80211_IFTYPE_MESH_POINT
) ||
331 !(sdata
->local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)) {
332 sdata
->vif
.cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
336 if (WARN_ON_ONCE(sdata
->vif
.cab_queue
== IEEE80211_INVAL_HW_QUEUE
))
339 if (WARN_ON_ONCE(sdata
->vif
.cab_queue
>= n_queues
))
345 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data
*sdata
,
348 struct ieee80211_local
*local
= sdata
->local
;
349 u32 flags
= sdata
->u
.mntr_flags
;
351 #define ADJUST(_f, _s) do { \
352 if (flags & MONITOR_FLAG_##_f) \
353 local->fif_##_s += offset; \
356 ADJUST(FCSFAIL
, fcsfail
);
357 ADJUST(PLCPFAIL
, plcpfail
);
358 ADJUST(CONTROL
, control
);
359 ADJUST(CONTROL
, pspoll
);
360 ADJUST(OTHER_BSS
, other_bss
);
365 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data
*sdata
)
367 struct ieee80211_local
*local
= sdata
->local
;
370 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
371 if (local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)
372 sdata
->vif
.hw_queue
[i
] = IEEE80211_INVAL_HW_QUEUE
;
373 else if (local
->hw
.queues
>= IEEE80211_NUM_ACS
)
374 sdata
->vif
.hw_queue
[i
] = i
;
376 sdata
->vif
.hw_queue
[i
] = 0;
378 sdata
->vif
.cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
381 int ieee80211_add_virtual_monitor(struct ieee80211_local
*local
)
383 struct ieee80211_sub_if_data
*sdata
;
386 if (!(local
->hw
.flags
& IEEE80211_HW_WANT_MONITOR_VIF
))
391 if (local
->monitor_sdata
)
394 sdata
= kzalloc(sizeof(*sdata
) + local
->hw
.vif_data_size
, GFP_KERNEL
);
399 sdata
->local
= local
;
400 sdata
->vif
.type
= NL80211_IFTYPE_MONITOR
;
401 snprintf(sdata
->name
, IFNAMSIZ
, "%s-monitor",
402 wiphy_name(local
->hw
.wiphy
));
404 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
406 ieee80211_set_default_queues(sdata
);
408 ret
= drv_add_interface(local
, sdata
);
410 /* ok .. stupid driver, it asked for this! */
415 ret
= ieee80211_check_queues(sdata
, NL80211_IFTYPE_MONITOR
);
421 mutex_lock(&local
->iflist_mtx
);
422 rcu_assign_pointer(local
->monitor_sdata
, sdata
);
423 mutex_unlock(&local
->iflist_mtx
);
425 mutex_lock(&local
->mtx
);
426 ret
= ieee80211_vif_use_channel(sdata
, &local
->monitor_chandef
,
427 IEEE80211_CHANCTX_EXCLUSIVE
);
428 mutex_unlock(&local
->mtx
);
430 mutex_lock(&local
->iflist_mtx
);
431 rcu_assign_pointer(local
->monitor_sdata
, NULL
);
432 mutex_unlock(&local
->iflist_mtx
);
434 drv_remove_interface(local
, sdata
);
442 void ieee80211_del_virtual_monitor(struct ieee80211_local
*local
)
444 struct ieee80211_sub_if_data
*sdata
;
446 if (!(local
->hw
.flags
& IEEE80211_HW_WANT_MONITOR_VIF
))
451 mutex_lock(&local
->iflist_mtx
);
453 sdata
= rcu_dereference_protected(local
->monitor_sdata
,
454 lockdep_is_held(&local
->iflist_mtx
));
456 mutex_unlock(&local
->iflist_mtx
);
460 rcu_assign_pointer(local
->monitor_sdata
, NULL
);
461 mutex_unlock(&local
->iflist_mtx
);
465 mutex_lock(&local
->mtx
);
466 ieee80211_vif_release_channel(sdata
);
467 mutex_unlock(&local
->mtx
);
469 drv_remove_interface(local
, sdata
);
475 * NOTE: Be very careful when changing this function, it must NOT return
476 * an error on interface type changes that have been pre-checked, so most
477 * checks should be in ieee80211_check_concurrent_iface.
479 int ieee80211_do_open(struct wireless_dev
*wdev
, bool coming_up
)
481 struct ieee80211_sub_if_data
*sdata
= IEEE80211_WDEV_TO_SUB_IF(wdev
);
482 struct net_device
*dev
= wdev
->netdev
;
483 struct ieee80211_local
*local
= sdata
->local
;
484 struct sta_info
*sta
;
487 u32 hw_reconf_flags
= 0;
489 switch (sdata
->vif
.type
) {
490 case NL80211_IFTYPE_WDS
:
491 if (!is_valid_ether_addr(sdata
->u
.wds
.remote_addr
))
494 case NL80211_IFTYPE_AP_VLAN
: {
495 struct ieee80211_sub_if_data
*master
;
500 list_add(&sdata
->u
.vlan
.list
, &sdata
->bss
->vlans
);
502 master
= container_of(sdata
->bss
,
503 struct ieee80211_sub_if_data
, u
.ap
);
504 sdata
->control_port_protocol
=
505 master
->control_port_protocol
;
506 sdata
->control_port_no_encrypt
=
507 master
->control_port_no_encrypt
;
508 sdata
->vif
.cab_queue
= master
->vif
.cab_queue
;
509 memcpy(sdata
->vif
.hw_queue
, master
->vif
.hw_queue
,
510 sizeof(sdata
->vif
.hw_queue
));
513 case NL80211_IFTYPE_AP
:
514 sdata
->bss
= &sdata
->u
.ap
;
516 case NL80211_IFTYPE_MESH_POINT
:
517 case NL80211_IFTYPE_STATION
:
518 case NL80211_IFTYPE_MONITOR
:
519 case NL80211_IFTYPE_ADHOC
:
520 case NL80211_IFTYPE_P2P_DEVICE
:
521 /* no special treatment */
523 case NL80211_IFTYPE_UNSPECIFIED
:
524 case NUM_NL80211_IFTYPES
:
525 case NL80211_IFTYPE_P2P_CLIENT
:
526 case NL80211_IFTYPE_P2P_GO
:
532 if (local
->open_count
== 0) {
533 res
= drv_start(local
);
536 /* we're brought up, everything changes */
537 hw_reconf_flags
= ~0;
538 ieee80211_led_radio(local
, true);
539 ieee80211_mod_tpt_led_trig(local
,
540 IEEE80211_TPT_LEDTRIG_FL_RADIO
, 0);
544 * Copy the hopefully now-present MAC address to
545 * this interface, if it has the special null one.
547 if (dev
&& is_zero_ether_addr(dev
->dev_addr
)) {
548 memcpy(dev
->dev_addr
,
549 local
->hw
.wiphy
->perm_addr
,
551 memcpy(dev
->perm_addr
, dev
->dev_addr
, ETH_ALEN
);
553 if (!is_valid_ether_addr(dev
->dev_addr
)) {
554 res
= -EADDRNOTAVAIL
;
559 switch (sdata
->vif
.type
) {
560 case NL80211_IFTYPE_AP_VLAN
:
561 /* no need to tell driver, but set carrier and chanctx */
562 if (rtnl_dereference(sdata
->bss
->beacon
)) {
563 ieee80211_vif_vlan_copy_chanctx(sdata
);
564 netif_carrier_on(dev
);
566 netif_carrier_off(dev
);
569 case NL80211_IFTYPE_MONITOR
:
570 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
571 local
->cooked_mntrs
++;
575 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
) {
576 res
= drv_add_interface(local
, sdata
);
579 } else if (local
->monitors
== 0 && local
->open_count
== 0) {
580 res
= ieee80211_add_virtual_monitor(local
);
585 /* must be before the call to ieee80211_configure_filter */
587 if (local
->monitors
== 1) {
588 local
->hw
.conf
.flags
|= IEEE80211_CONF_MONITOR
;
589 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
592 ieee80211_adjust_monitor_flags(sdata
, 1);
593 ieee80211_configure_filter(local
);
594 mutex_lock(&local
->mtx
);
595 ieee80211_recalc_idle(local
);
596 mutex_unlock(&local
->mtx
);
598 netif_carrier_on(dev
);
602 ieee80211_del_virtual_monitor(local
);
604 res
= drv_add_interface(local
, sdata
);
607 res
= ieee80211_check_queues(sdata
,
608 ieee80211_vif_type_p2p(&sdata
->vif
));
610 goto err_del_interface
;
613 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
615 local
->fif_probe_req
++;
617 ieee80211_configure_filter(local
);
618 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
619 local
->fif_probe_req
++;
622 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
)
623 changed
|= ieee80211_reset_erp_info(sdata
);
624 ieee80211_bss_info_change_notify(sdata
, changed
);
626 switch (sdata
->vif
.type
) {
627 case NL80211_IFTYPE_STATION
:
628 case NL80211_IFTYPE_ADHOC
:
629 case NL80211_IFTYPE_AP
:
630 case NL80211_IFTYPE_MESH_POINT
:
631 netif_carrier_off(dev
);
633 case NL80211_IFTYPE_WDS
:
634 case NL80211_IFTYPE_P2P_DEVICE
:
642 * set default queue parameters so drivers don't
643 * need to initialise the hardware if the hardware
644 * doesn't start up with sane defaults
646 ieee80211_set_wmm_default(sdata
, true);
649 set_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
651 if (sdata
->vif
.type
== NL80211_IFTYPE_WDS
) {
652 /* Create STA entry for the WDS peer */
653 sta
= sta_info_alloc(sdata
, sdata
->u
.wds
.remote_addr
,
657 goto err_del_interface
;
660 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTH
);
661 sta_info_pre_move_state(sta
, IEEE80211_STA_ASSOC
);
662 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
664 res
= sta_info_insert(sta
);
666 /* STA has been freed */
667 goto err_del_interface
;
670 rate_control_rate_init(sta
);
671 netif_carrier_on(dev
);
672 } else if (sdata
->vif
.type
== NL80211_IFTYPE_P2P_DEVICE
) {
673 rcu_assign_pointer(local
->p2p_sdata
, sdata
);
677 * set_multicast_list will be invoked by the networking core
678 * which will check whether any increments here were done in
679 * error and sync them down to the hardware as filter flags.
681 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
682 atomic_inc(&local
->iff_allmultis
);
684 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
685 atomic_inc(&local
->iff_promiscs
);
691 ieee80211_hw_config(local
, hw_reconf_flags
);
693 ieee80211_recalc_ps(local
, -1);
695 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
696 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
697 /* XXX: for AP_VLAN, actually track AP queues */
698 netif_tx_start_all_queues(dev
);
701 int n_acs
= IEEE80211_NUM_ACS
;
704 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
707 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
708 if (sdata
->vif
.cab_queue
== IEEE80211_INVAL_HW_QUEUE
||
709 (local
->queue_stop_reasons
[sdata
->vif
.cab_queue
] == 0 &&
710 skb_queue_empty(&local
->pending
[sdata
->vif
.cab_queue
]))) {
711 for (ac
= 0; ac
< n_acs
; ac
++) {
712 int ac_queue
= sdata
->vif
.hw_queue
[ac
];
714 if (local
->queue_stop_reasons
[ac_queue
] == 0 &&
715 skb_queue_empty(&local
->pending
[ac_queue
]))
716 netif_start_subqueue(dev
, ac
);
719 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
724 drv_remove_interface(local
, sdata
);
726 if (!local
->open_count
)
730 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
731 list_del(&sdata
->u
.vlan
.list
);
732 /* might already be clear but that doesn't matter */
733 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
737 static int ieee80211_open(struct net_device
*dev
)
739 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
742 /* fail early if user set an invalid address */
743 if (!is_valid_ether_addr(dev
->dev_addr
))
744 return -EADDRNOTAVAIL
;
746 err
= ieee80211_check_concurrent_iface(sdata
, sdata
->vif
.type
);
750 return ieee80211_do_open(&sdata
->wdev
, true);
753 static void ieee80211_do_stop(struct ieee80211_sub_if_data
*sdata
,
756 struct ieee80211_local
*local
= sdata
->local
;
758 struct sk_buff
*skb
, *tmp
;
759 u32 hw_reconf_flags
= 0;
762 struct cfg80211_chan_def chandef
;
764 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
766 if (rcu_access_pointer(local
->scan_sdata
) == sdata
)
767 ieee80211_scan_cancel(local
);
770 * Stop TX on this interface first.
773 netif_tx_stop_all_queues(sdata
->dev
);
775 ieee80211_roc_purge(local
, sdata
);
777 switch (sdata
->vif
.type
) {
778 case NL80211_IFTYPE_STATION
:
779 ieee80211_mgd_stop(sdata
);
781 case NL80211_IFTYPE_ADHOC
:
782 ieee80211_ibss_stop(sdata
);
784 case NL80211_IFTYPE_AP
:
785 cancel_work_sync(&sdata
->u
.ap
.request_smps_work
);
792 * Remove all stations associated with this interface.
794 * This must be done before calling ops->remove_interface()
795 * because otherwise we can later invoke ops->sta_notify()
796 * whenever the STAs are removed, and that invalidates driver
797 * assumptions about always getting a vif pointer that is valid
798 * (because if we remove a STA after ops->remove_interface()
799 * the driver will have removed the vif info already!)
801 * This is relevant only in WDS mode, in all other modes we've
802 * already removed all stations when disconnecting or similar,
805 flushed
= sta_info_flush(sdata
);
806 WARN_ON_ONCE((sdata
->vif
.type
!= NL80211_IFTYPE_WDS
&& flushed
> 0) ||
807 (sdata
->vif
.type
== NL80211_IFTYPE_WDS
&& flushed
!= 1));
809 /* don't count this interface for promisc/allmulti while it is down */
810 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
811 atomic_dec(&local
->iff_allmultis
);
813 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
814 atomic_dec(&local
->iff_promiscs
);
816 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
818 local
->fif_probe_req
--;
819 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
820 local
->fif_probe_req
--;
824 netif_addr_lock_bh(sdata
->dev
);
825 spin_lock_bh(&local
->filter_lock
);
826 __hw_addr_unsync(&local
->mc_list
, &sdata
->dev
->mc
,
827 sdata
->dev
->addr_len
);
828 spin_unlock_bh(&local
->filter_lock
);
829 netif_addr_unlock_bh(sdata
->dev
);
832 del_timer_sync(&local
->dynamic_ps_timer
);
833 cancel_work_sync(&local
->dynamic_ps_enable_work
);
835 cancel_work_sync(&sdata
->recalc_smps
);
837 sdata
->vif
.csa_active
= false;
839 cancel_work_sync(&sdata
->csa_finalize_work
);
841 cancel_delayed_work_sync(&sdata
->dfs_cac_timer_work
);
843 if (sdata
->wdev
.cac_started
) {
844 chandef
= sdata
->vif
.bss_conf
.chandef
;
845 WARN_ON(local
->suspended
);
846 mutex_lock(&local
->mtx
);
847 ieee80211_vif_release_channel(sdata
);
848 mutex_unlock(&local
->mtx
);
849 cfg80211_cac_event(sdata
->dev
, &chandef
,
850 NL80211_RADAR_CAC_ABORTED
,
854 /* APs need special treatment */
855 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
856 struct ieee80211_sub_if_data
*vlan
, *tmpsdata
;
858 /* down all dependent devices, that is VLANs */
859 list_for_each_entry_safe(vlan
, tmpsdata
, &sdata
->u
.ap
.vlans
,
861 dev_close(vlan
->dev
);
862 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
863 } else if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
864 /* remove all packets in parent bc_buf pointing to this dev */
865 ps
= &sdata
->bss
->ps
;
867 spin_lock_irqsave(&ps
->bc_buf
.lock
, flags
);
868 skb_queue_walk_safe(&ps
->bc_buf
, skb
, tmp
) {
869 if (skb
->dev
== sdata
->dev
) {
870 __skb_unlink(skb
, &ps
->bc_buf
);
871 local
->total_ps_buffered
--;
872 ieee80211_free_txskb(&local
->hw
, skb
);
875 spin_unlock_irqrestore(&ps
->bc_buf
.lock
, flags
);
881 switch (sdata
->vif
.type
) {
882 case NL80211_IFTYPE_AP_VLAN
:
883 list_del(&sdata
->u
.vlan
.list
);
884 rcu_assign_pointer(sdata
->vif
.chanctx_conf
, NULL
);
885 /* no need to tell driver */
887 case NL80211_IFTYPE_MONITOR
:
888 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
889 local
->cooked_mntrs
--;
894 if (local
->monitors
== 0) {
895 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_MONITOR
;
896 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
899 ieee80211_adjust_monitor_flags(sdata
, -1);
901 case NL80211_IFTYPE_P2P_DEVICE
:
902 /* relies on synchronize_rcu() below */
903 rcu_assign_pointer(local
->p2p_sdata
, NULL
);
906 cancel_work_sync(&sdata
->work
);
908 * When we get here, the interface is marked down.
909 * Free the remaining keys, if there are any
910 * (shouldn't be, except maybe in WDS mode?)
912 * Force the key freeing to always synchronize_net()
913 * to wait for the RX path in case it is using this
914 * interface enqueuing frames * at this very time on
917 ieee80211_free_keys(sdata
, true);
920 case NL80211_IFTYPE_AP
:
921 skb_queue_purge(&sdata
->skb_queue
);
926 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
927 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
928 skb_queue_walk_safe(&local
->pending
[i
], skb
, tmp
) {
929 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
930 if (info
->control
.vif
== &sdata
->vif
) {
931 __skb_unlink(skb
, &local
->pending
[i
]);
932 ieee80211_free_txskb(&local
->hw
, skb
);
936 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
938 if (local
->open_count
== 0)
939 ieee80211_clear_tx_pending(local
);
942 * If the interface goes down while suspended, presumably because
943 * the device was unplugged and that happens before our resume,
944 * then the driver is already unconfigured and the remainder of
945 * this function isn't needed.
946 * XXX: what about WoWLAN? If the device has software state, e.g.
947 * memory allocated, it might expect teardown commands from
950 if (local
->suspended
) {
951 WARN_ON(local
->wowlan
);
952 WARN_ON(rtnl_dereference(local
->monitor_sdata
));
956 switch (sdata
->vif
.type
) {
957 case NL80211_IFTYPE_AP_VLAN
:
959 case NL80211_IFTYPE_MONITOR
:
960 if (local
->monitors
== 0)
961 ieee80211_del_virtual_monitor(local
);
963 mutex_lock(&local
->mtx
);
964 ieee80211_recalc_idle(local
);
965 mutex_unlock(&local
->mtx
);
967 if (!(sdata
->u
.mntr_flags
& MONITOR_FLAG_ACTIVE
))
973 drv_remove_interface(local
, sdata
);
976 ieee80211_recalc_ps(local
, -1);
978 if (local
->open_count
== 0) {
979 ieee80211_stop_device(local
);
981 /* no reconfiguring after stop! */
985 /* do after stop to avoid reconfiguring when we stop anyway */
986 ieee80211_configure_filter(local
);
987 ieee80211_hw_config(local
, hw_reconf_flags
);
989 if (local
->monitors
== local
->open_count
)
990 ieee80211_add_virtual_monitor(local
);
993 static int ieee80211_stop(struct net_device
*dev
)
995 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
997 ieee80211_do_stop(sdata
, true);
1002 static void ieee80211_set_multicast_list(struct net_device
*dev
)
1004 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1005 struct ieee80211_local
*local
= sdata
->local
;
1006 int allmulti
, promisc
, sdata_allmulti
, sdata_promisc
;
1008 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
1009 promisc
= !!(dev
->flags
& IFF_PROMISC
);
1010 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
1011 sdata_promisc
= !!(sdata
->flags
& IEEE80211_SDATA_PROMISC
);
1013 if (allmulti
!= sdata_allmulti
) {
1014 if (dev
->flags
& IFF_ALLMULTI
)
1015 atomic_inc(&local
->iff_allmultis
);
1017 atomic_dec(&local
->iff_allmultis
);
1018 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
1021 if (promisc
!= sdata_promisc
) {
1022 if (dev
->flags
& IFF_PROMISC
)
1023 atomic_inc(&local
->iff_promiscs
);
1025 atomic_dec(&local
->iff_promiscs
);
1026 sdata
->flags
^= IEEE80211_SDATA_PROMISC
;
1028 spin_lock_bh(&local
->filter_lock
);
1029 __hw_addr_sync(&local
->mc_list
, &dev
->mc
, dev
->addr_len
);
1030 spin_unlock_bh(&local
->filter_lock
);
1031 ieee80211_queue_work(&local
->hw
, &local
->reconfig_filter
);
1035 * Called when the netdev is removed or, by the code below, before
1036 * the interface type changes.
1038 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data
*sdata
)
1042 /* free extra data */
1043 ieee80211_free_keys(sdata
, false);
1045 ieee80211_debugfs_remove_netdev(sdata
);
1047 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
1048 __skb_queue_purge(&sdata
->fragments
[i
].skb_list
);
1049 sdata
->fragment_next
= 0;
1051 if (ieee80211_vif_is_mesh(&sdata
->vif
))
1052 mesh_rmc_free(sdata
);
1055 static void ieee80211_uninit(struct net_device
*dev
)
1057 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev
));
1060 static u16
ieee80211_netdev_select_queue(struct net_device
*dev
,
1061 struct sk_buff
*skb
,
1063 select_queue_fallback_t fallback
)
1065 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev
), skb
);
1068 static const struct net_device_ops ieee80211_dataif_ops
= {
1069 .ndo_open
= ieee80211_open
,
1070 .ndo_stop
= ieee80211_stop
,
1071 .ndo_uninit
= ieee80211_uninit
,
1072 .ndo_start_xmit
= ieee80211_subif_start_xmit
,
1073 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
1074 .ndo_change_mtu
= ieee80211_change_mtu
,
1075 .ndo_set_mac_address
= ieee80211_change_mac
,
1076 .ndo_select_queue
= ieee80211_netdev_select_queue
,
1079 static u16
ieee80211_monitor_select_queue(struct net_device
*dev
,
1080 struct sk_buff
*skb
,
1082 select_queue_fallback_t fallback
)
1084 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1085 struct ieee80211_local
*local
= sdata
->local
;
1086 struct ieee80211_hdr
*hdr
;
1087 struct ieee80211_radiotap_header
*rtap
= (void *)skb
->data
;
1089 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1093 skb
->len
< le16_to_cpu(rtap
->it_len
) + 2 /* frame control */)
1094 return 0; /* doesn't matter, frame will be dropped */
1096 hdr
= (void *)((u8
*)skb
->data
+ le16_to_cpu(rtap
->it_len
));
1098 return ieee80211_select_queue_80211(sdata
, skb
, hdr
);
1101 static const struct net_device_ops ieee80211_monitorif_ops
= {
1102 .ndo_open
= ieee80211_open
,
1103 .ndo_stop
= ieee80211_stop
,
1104 .ndo_uninit
= ieee80211_uninit
,
1105 .ndo_start_xmit
= ieee80211_monitor_start_xmit
,
1106 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
1107 .ndo_change_mtu
= ieee80211_change_mtu
,
1108 .ndo_set_mac_address
= ieee80211_change_mac
,
1109 .ndo_select_queue
= ieee80211_monitor_select_queue
,
1112 static void ieee80211_if_setup(struct net_device
*dev
)
1115 dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1116 dev
->netdev_ops
= &ieee80211_dataif_ops
;
1117 dev
->destructor
= free_netdev
;
1120 static void ieee80211_iface_work(struct work_struct
*work
)
1122 struct ieee80211_sub_if_data
*sdata
=
1123 container_of(work
, struct ieee80211_sub_if_data
, work
);
1124 struct ieee80211_local
*local
= sdata
->local
;
1125 struct sk_buff
*skb
;
1126 struct sta_info
*sta
;
1127 struct ieee80211_ra_tid
*ra_tid
;
1129 if (!ieee80211_sdata_running(sdata
))
1132 if (local
->scanning
)
1136 * ieee80211_queue_work() should have picked up most cases,
1137 * here we'll pick the rest.
1139 if (WARN(local
->suspended
,
1140 "interface work scheduled while going to suspend\n"))
1143 /* first process frames */
1144 while ((skb
= skb_dequeue(&sdata
->skb_queue
))) {
1145 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
1147 if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_START
) {
1148 ra_tid
= (void *)&skb
->cb
;
1149 ieee80211_start_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
1151 } else if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_STOP
) {
1152 ra_tid
= (void *)&skb
->cb
;
1153 ieee80211_stop_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
1155 } else if (ieee80211_is_action(mgmt
->frame_control
) &&
1156 mgmt
->u
.action
.category
== WLAN_CATEGORY_BACK
) {
1159 mutex_lock(&local
->sta_mtx
);
1160 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
1162 switch (mgmt
->u
.action
.u
.addba_req
.action_code
) {
1163 case WLAN_ACTION_ADDBA_REQ
:
1164 ieee80211_process_addba_request(
1165 local
, sta
, mgmt
, len
);
1167 case WLAN_ACTION_ADDBA_RESP
:
1168 ieee80211_process_addba_resp(local
, sta
,
1171 case WLAN_ACTION_DELBA
:
1172 ieee80211_process_delba(sdata
, sta
,
1180 mutex_unlock(&local
->sta_mtx
);
1181 } else if (ieee80211_is_data_qos(mgmt
->frame_control
)) {
1182 struct ieee80211_hdr
*hdr
= (void *)mgmt
;
1184 * So the frame isn't mgmt, but frame_control
1185 * is at the right place anyway, of course, so
1186 * the if statement is correct.
1188 * Warn if we have other data frame types here,
1189 * they must not get here.
1191 WARN_ON(hdr
->frame_control
&
1192 cpu_to_le16(IEEE80211_STYPE_NULLFUNC
));
1193 WARN_ON(!(hdr
->seq_ctrl
&
1194 cpu_to_le16(IEEE80211_SCTL_FRAG
)));
1196 * This was a fragment of a frame, received while
1197 * a block-ack session was active. That cannot be
1198 * right, so terminate the session.
1200 mutex_lock(&local
->sta_mtx
);
1201 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
1203 u16 tid
= *ieee80211_get_qos_ctl(hdr
) &
1204 IEEE80211_QOS_CTL_TID_MASK
;
1206 __ieee80211_stop_rx_ba_session(
1207 sta
, tid
, WLAN_BACK_RECIPIENT
,
1208 WLAN_REASON_QSTA_REQUIRE_SETUP
,
1211 mutex_unlock(&local
->sta_mtx
);
1212 } else switch (sdata
->vif
.type
) {
1213 case NL80211_IFTYPE_STATION
:
1214 ieee80211_sta_rx_queued_mgmt(sdata
, skb
);
1216 case NL80211_IFTYPE_ADHOC
:
1217 ieee80211_ibss_rx_queued_mgmt(sdata
, skb
);
1219 case NL80211_IFTYPE_MESH_POINT
:
1220 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
1222 ieee80211_mesh_rx_queued_mgmt(sdata
, skb
);
1225 WARN(1, "frame for unexpected interface type");
1232 /* then other type-dependent work */
1233 switch (sdata
->vif
.type
) {
1234 case NL80211_IFTYPE_STATION
:
1235 ieee80211_sta_work(sdata
);
1237 case NL80211_IFTYPE_ADHOC
:
1238 ieee80211_ibss_work(sdata
);
1240 case NL80211_IFTYPE_MESH_POINT
:
1241 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
1243 ieee80211_mesh_work(sdata
);
1250 static void ieee80211_recalc_smps_work(struct work_struct
*work
)
1252 struct ieee80211_sub_if_data
*sdata
=
1253 container_of(work
, struct ieee80211_sub_if_data
, recalc_smps
);
1255 ieee80211_recalc_smps(sdata
);
1259 * Helper function to initialise an interface to a specific type.
1261 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data
*sdata
,
1262 enum nl80211_iftype type
)
1264 /* clear type-dependent union */
1265 memset(&sdata
->u
, 0, sizeof(sdata
->u
));
1267 /* and set some type-dependent values */
1268 sdata
->vif
.type
= type
;
1269 sdata
->vif
.p2p
= false;
1270 sdata
->wdev
.iftype
= type
;
1272 sdata
->control_port_protocol
= cpu_to_be16(ETH_P_PAE
);
1273 sdata
->control_port_no_encrypt
= false;
1274 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
1276 sdata
->noack_map
= 0;
1278 /* only monitor/p2p-device differ */
1280 sdata
->dev
->netdev_ops
= &ieee80211_dataif_ops
;
1281 sdata
->dev
->type
= ARPHRD_ETHER
;
1284 skb_queue_head_init(&sdata
->skb_queue
);
1285 INIT_WORK(&sdata
->work
, ieee80211_iface_work
);
1286 INIT_WORK(&sdata
->recalc_smps
, ieee80211_recalc_smps_work
);
1287 INIT_WORK(&sdata
->csa_finalize_work
, ieee80211_csa_finalize_work
);
1290 case NL80211_IFTYPE_P2P_GO
:
1291 type
= NL80211_IFTYPE_AP
;
1292 sdata
->vif
.type
= type
;
1293 sdata
->vif
.p2p
= true;
1295 case NL80211_IFTYPE_AP
:
1296 skb_queue_head_init(&sdata
->u
.ap
.ps
.bc_buf
);
1297 INIT_LIST_HEAD(&sdata
->u
.ap
.vlans
);
1298 INIT_WORK(&sdata
->u
.ap
.request_smps_work
,
1299 ieee80211_request_smps_ap_work
);
1300 sdata
->vif
.bss_conf
.bssid
= sdata
->vif
.addr
;
1301 sdata
->u
.ap
.req_smps
= IEEE80211_SMPS_OFF
;
1303 case NL80211_IFTYPE_P2P_CLIENT
:
1304 type
= NL80211_IFTYPE_STATION
;
1305 sdata
->vif
.type
= type
;
1306 sdata
->vif
.p2p
= true;
1308 case NL80211_IFTYPE_STATION
:
1309 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.mgd
.bssid
;
1310 ieee80211_sta_setup_sdata(sdata
);
1312 case NL80211_IFTYPE_ADHOC
:
1313 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.ibss
.bssid
;
1314 ieee80211_ibss_setup_sdata(sdata
);
1316 case NL80211_IFTYPE_MESH_POINT
:
1317 if (ieee80211_vif_is_mesh(&sdata
->vif
))
1318 ieee80211_mesh_init_sdata(sdata
);
1320 case NL80211_IFTYPE_MONITOR
:
1321 sdata
->dev
->type
= ARPHRD_IEEE80211_RADIOTAP
;
1322 sdata
->dev
->netdev_ops
= &ieee80211_monitorif_ops
;
1323 sdata
->u
.mntr_flags
= MONITOR_FLAG_CONTROL
|
1324 MONITOR_FLAG_OTHER_BSS
;
1326 case NL80211_IFTYPE_WDS
:
1327 sdata
->vif
.bss_conf
.bssid
= NULL
;
1329 case NL80211_IFTYPE_AP_VLAN
:
1330 case NL80211_IFTYPE_P2P_DEVICE
:
1331 sdata
->vif
.bss_conf
.bssid
= sdata
->vif
.addr
;
1333 case NL80211_IFTYPE_UNSPECIFIED
:
1334 case NUM_NL80211_IFTYPES
:
1339 ieee80211_debugfs_add_netdev(sdata
);
1342 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data
*sdata
,
1343 enum nl80211_iftype type
)
1345 struct ieee80211_local
*local
= sdata
->local
;
1347 enum nl80211_iftype internal_type
= type
;
1352 if (!local
->ops
->change_interface
)
1355 switch (sdata
->vif
.type
) {
1356 case NL80211_IFTYPE_AP
:
1357 case NL80211_IFTYPE_STATION
:
1358 case NL80211_IFTYPE_ADHOC
:
1360 * Could maybe also all others here?
1361 * Just not sure how that interacts
1362 * with the RX/config path e.g. for
1371 case NL80211_IFTYPE_AP
:
1372 case NL80211_IFTYPE_STATION
:
1373 case NL80211_IFTYPE_ADHOC
:
1375 * Could probably support everything
1376 * but WDS here (WDS do_open can fail
1377 * under memory pressure, which this
1378 * code isn't prepared to handle).
1381 case NL80211_IFTYPE_P2P_CLIENT
:
1383 internal_type
= NL80211_IFTYPE_STATION
;
1385 case NL80211_IFTYPE_P2P_GO
:
1387 internal_type
= NL80211_IFTYPE_AP
;
1393 ret
= ieee80211_check_concurrent_iface(sdata
, internal_type
);
1397 ieee80211_do_stop(sdata
, false);
1399 ieee80211_teardown_sdata(sdata
);
1401 ret
= drv_change_interface(local
, sdata
, internal_type
, p2p
);
1403 type
= ieee80211_vif_type_p2p(&sdata
->vif
);
1406 * Ignore return value here, there's not much we can do since
1407 * the driver changed the interface type internally already.
1408 * The warnings will hopefully make driver authors fix it :-)
1410 ieee80211_check_queues(sdata
, type
);
1412 ieee80211_setup_sdata(sdata
, type
);
1414 err
= ieee80211_do_open(&sdata
->wdev
, false);
1415 WARN(err
, "type change: do_open returned %d", err
);
1420 int ieee80211_if_change_type(struct ieee80211_sub_if_data
*sdata
,
1421 enum nl80211_iftype type
)
1427 if (type
== ieee80211_vif_type_p2p(&sdata
->vif
))
1430 if (ieee80211_sdata_running(sdata
)) {
1431 ret
= ieee80211_runtime_change_iftype(sdata
, type
);
1435 /* Purge and reset type-dependent state. */
1436 ieee80211_teardown_sdata(sdata
);
1437 ieee80211_setup_sdata(sdata
, type
);
1440 /* reset some values that shouldn't be kept across type changes */
1441 sdata
->drop_unencrypted
= 0;
1442 if (type
== NL80211_IFTYPE_STATION
)
1443 sdata
->u
.mgd
.use_4addr
= false;
1448 static void ieee80211_assign_perm_addr(struct ieee80211_local
*local
,
1449 u8
*perm_addr
, enum nl80211_iftype type
)
1451 struct ieee80211_sub_if_data
*sdata
;
1452 u64 mask
, start
, addr
, val
, inc
;
1454 u8 tmp_addr
[ETH_ALEN
];
1457 /* default ... something at least */
1458 memcpy(perm_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
1460 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
) &&
1461 local
->hw
.wiphy
->n_addresses
<= 1)
1464 mutex_lock(&local
->iflist_mtx
);
1467 case NL80211_IFTYPE_MONITOR
:
1468 /* doesn't matter */
1470 case NL80211_IFTYPE_WDS
:
1471 case NL80211_IFTYPE_AP_VLAN
:
1472 /* match up with an AP interface */
1473 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1474 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
1476 memcpy(perm_addr
, sdata
->vif
.addr
, ETH_ALEN
);
1479 /* keep default if no AP interface present */
1481 case NL80211_IFTYPE_P2P_CLIENT
:
1482 case NL80211_IFTYPE_P2P_GO
:
1483 if (local
->hw
.flags
& IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF
) {
1484 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1485 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
)
1487 if (!ieee80211_sdata_running(sdata
))
1489 memcpy(perm_addr
, sdata
->vif
.addr
, ETH_ALEN
);
1493 /* otherwise fall through */
1495 /* assign a new address if possible -- try n_addresses first */
1496 for (i
= 0; i
< local
->hw
.wiphy
->n_addresses
; i
++) {
1499 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1500 if (ether_addr_equal(local
->hw
.wiphy
->addresses
[i
].addr
,
1509 local
->hw
.wiphy
->addresses
[i
].addr
,
1515 /* try mask if available */
1516 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
))
1519 m
= local
->hw
.wiphy
->addr_mask
;
1520 mask
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1521 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1522 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1524 if (__ffs64(mask
) + hweight64(mask
) != fls64(mask
)) {
1525 /* not a contiguous mask ... not handled now! */
1526 pr_info("not contiguous\n");
1531 * Pick address of existing interface in case user changed
1532 * MAC address manually, default to perm_addr.
1534 m
= local
->hw
.wiphy
->perm_addr
;
1535 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1536 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
)
1538 m
= sdata
->vif
.addr
;
1541 start
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1542 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1543 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1545 inc
= 1ULL<<__ffs64(mask
);
1546 val
= (start
& mask
);
1547 addr
= (start
& ~mask
) | (val
& mask
);
1551 tmp_addr
[5] = addr
>> 0*8;
1552 tmp_addr
[4] = addr
>> 1*8;
1553 tmp_addr
[3] = addr
>> 2*8;
1554 tmp_addr
[2] = addr
>> 3*8;
1555 tmp_addr
[1] = addr
>> 4*8;
1556 tmp_addr
[0] = addr
>> 5*8;
1560 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1561 if (ether_addr_equal(tmp_addr
, sdata
->vif
.addr
)) {
1568 memcpy(perm_addr
, tmp_addr
, ETH_ALEN
);
1571 addr
= (start
& ~mask
) | (val
& mask
);
1572 } while (addr
!= start
);
1578 mutex_unlock(&local
->iflist_mtx
);
1581 int ieee80211_if_add(struct ieee80211_local
*local
, const char *name
,
1582 struct wireless_dev
**new_wdev
, enum nl80211_iftype type
,
1583 struct vif_params
*params
)
1585 struct net_device
*ndev
= NULL
;
1586 struct ieee80211_sub_if_data
*sdata
= NULL
;
1592 if (type
== NL80211_IFTYPE_P2P_DEVICE
) {
1593 struct wireless_dev
*wdev
;
1595 sdata
= kzalloc(sizeof(*sdata
) + local
->hw
.vif_data_size
,
1599 wdev
= &sdata
->wdev
;
1602 strlcpy(sdata
->name
, name
, IFNAMSIZ
);
1603 ieee80211_assign_perm_addr(local
, wdev
->address
, type
);
1604 memcpy(sdata
->vif
.addr
, wdev
->address
, ETH_ALEN
);
1606 if (local
->hw
.queues
>= IEEE80211_NUM_ACS
)
1607 txqs
= IEEE80211_NUM_ACS
;
1609 ndev
= alloc_netdev_mqs(sizeof(*sdata
) +
1610 local
->hw
.vif_data_size
,
1611 name
, ieee80211_if_setup
, txqs
, 1);
1614 dev_net_set(ndev
, wiphy_net(local
->hw
.wiphy
));
1616 ndev
->needed_headroom
= local
->tx_headroom
+
1617 4*6 /* four MAC addresses */
1618 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1620 + 8 /* rfc1042/bridge tunnel */
1621 - ETH_HLEN
/* ethernet hard_header_len */
1622 + IEEE80211_ENCRYPT_HEADROOM
;
1623 ndev
->needed_tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
1625 ret
= dev_alloc_name(ndev
, ndev
->name
);
1631 ieee80211_assign_perm_addr(local
, ndev
->perm_addr
, type
);
1632 memcpy(ndev
->dev_addr
, ndev
->perm_addr
, ETH_ALEN
);
1633 SET_NETDEV_DEV(ndev
, wiphy_dev(local
->hw
.wiphy
));
1635 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1636 sdata
= netdev_priv(ndev
);
1637 ndev
->ieee80211_ptr
= &sdata
->wdev
;
1638 memcpy(sdata
->vif
.addr
, ndev
->dev_addr
, ETH_ALEN
);
1639 memcpy(sdata
->name
, ndev
->name
, IFNAMSIZ
);
1644 /* initialise type-independent data */
1645 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
1646 sdata
->local
= local
;
1648 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
1649 skb_queue_head_init(&sdata
->fragments
[i
].skb_list
);
1651 INIT_LIST_HEAD(&sdata
->key_list
);
1653 INIT_DELAYED_WORK(&sdata
->dfs_cac_timer_work
,
1654 ieee80211_dfs_cac_timer_work
);
1655 INIT_DELAYED_WORK(&sdata
->dec_tailroom_needed_wk
,
1656 ieee80211_delayed_tailroom_dec
);
1658 for (i
= 0; i
< IEEE80211_NUM_BANDS
; i
++) {
1659 struct ieee80211_supported_band
*sband
;
1660 sband
= local
->hw
.wiphy
->bands
[i
];
1661 sdata
->rc_rateidx_mask
[i
] =
1662 sband
? (1 << sband
->n_bitrates
) - 1 : 0;
1664 memcpy(sdata
->rc_rateidx_mcs_mask
[i
],
1665 sband
->ht_cap
.mcs
.rx_mask
,
1666 sizeof(sdata
->rc_rateidx_mcs_mask
[i
]));
1668 memset(sdata
->rc_rateidx_mcs_mask
[i
], 0,
1669 sizeof(sdata
->rc_rateidx_mcs_mask
[i
]));
1672 ieee80211_set_default_queues(sdata
);
1674 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
1675 sdata
->user_power_level
= local
->user_power_level
;
1677 sdata
->encrypt_headroom
= IEEE80211_ENCRYPT_HEADROOM
;
1679 /* setup type-dependent data */
1680 ieee80211_setup_sdata(sdata
, type
);
1684 ndev
->ieee80211_ptr
->use_4addr
= params
->use_4addr
;
1685 if (type
== NL80211_IFTYPE_STATION
)
1686 sdata
->u
.mgd
.use_4addr
= params
->use_4addr
;
1689 ndev
->features
|= local
->hw
.netdev_features
;
1691 ret
= register_netdevice(ndev
);
1698 mutex_lock(&local
->iflist_mtx
);
1699 list_add_tail_rcu(&sdata
->list
, &local
->interfaces
);
1700 mutex_unlock(&local
->iflist_mtx
);
1703 *new_wdev
= &sdata
->wdev
;
1708 void ieee80211_if_remove(struct ieee80211_sub_if_data
*sdata
)
1712 mutex_lock(&sdata
->local
->iflist_mtx
);
1713 list_del_rcu(&sdata
->list
);
1714 mutex_unlock(&sdata
->local
->iflist_mtx
);
1719 unregister_netdevice(sdata
->dev
);
1721 cfg80211_unregister_wdev(&sdata
->wdev
);
1726 void ieee80211_sdata_stop(struct ieee80211_sub_if_data
*sdata
)
1728 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING
, &sdata
->state
)))
1730 ieee80211_do_stop(sdata
, true);
1731 ieee80211_teardown_sdata(sdata
);
1735 * Remove all interfaces, may only be called at hardware unregistration
1736 * time because it doesn't do RCU-safe list removals.
1738 void ieee80211_remove_interfaces(struct ieee80211_local
*local
)
1740 struct ieee80211_sub_if_data
*sdata
, *tmp
;
1741 LIST_HEAD(unreg_list
);
1742 LIST_HEAD(wdev_list
);
1747 * Close all AP_VLAN interfaces first, as otherwise they
1748 * might be closed while the AP interface they belong to
1749 * is closed, causing unregister_netdevice_many() to crash.
1751 list_for_each_entry(sdata
, &local
->interfaces
, list
)
1752 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
1753 dev_close(sdata
->dev
);
1755 mutex_lock(&local
->iflist_mtx
);
1756 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
1757 list_del(&sdata
->list
);
1760 unregister_netdevice_queue(sdata
->dev
, &unreg_list
);
1762 list_add(&sdata
->list
, &wdev_list
);
1764 mutex_unlock(&local
->iflist_mtx
);
1765 unregister_netdevice_many(&unreg_list
);
1766 list_del(&unreg_list
);
1768 list_for_each_entry_safe(sdata
, tmp
, &wdev_list
, list
) {
1769 list_del(&sdata
->list
);
1770 cfg80211_unregister_wdev(&sdata
->wdev
);
1775 static int netdev_notify(struct notifier_block
*nb
,
1776 unsigned long state
, void *ptr
)
1778 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
1779 struct ieee80211_sub_if_data
*sdata
;
1781 if (state
!= NETDEV_CHANGENAME
)
1784 if (!dev
->ieee80211_ptr
|| !dev
->ieee80211_ptr
->wiphy
)
1787 if (dev
->ieee80211_ptr
->wiphy
->privid
!= mac80211_wiphy_privid
)
1790 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1792 memcpy(sdata
->name
, dev
->name
, IFNAMSIZ
);
1794 ieee80211_debugfs_rename_netdev(sdata
);
1798 static struct notifier_block mac80211_netdev_notifier
= {
1799 .notifier_call
= netdev_notify
,
1802 int ieee80211_iface_init(void)
1804 return register_netdevice_notifier(&mac80211_netdev_notifier
);
1807 void ieee80211_iface_exit(void)
1809 unregister_netdevice_notifier(&mac80211_netdev_notifier
);