2 * Interface handling (except master interface)
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.
46 static u32
ieee80211_idle_off(struct ieee80211_local
*local
,
49 if (!(local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
))
52 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_IDLE
;
53 return IEEE80211_CONF_CHANGE_IDLE
;
56 static u32
ieee80211_idle_on(struct ieee80211_local
*local
)
58 if (local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
)
61 drv_flush(local
, false);
63 local
->hw
.conf
.flags
|= IEEE80211_CONF_IDLE
;
64 return IEEE80211_CONF_CHANGE_IDLE
;
67 static u32
__ieee80211_recalc_idle(struct ieee80211_local
*local
)
69 struct ieee80211_sub_if_data
*sdata
;
71 bool working
= false, scanning
= false;
72 unsigned int led_trig_start
= 0, led_trig_stop
= 0;
73 struct ieee80211_roc_work
*roc
;
75 #ifdef CONFIG_PROVE_LOCKING
76 WARN_ON(debug_locks
&& !lockdep_rtnl_is_held() &&
77 !lockdep_is_held(&local
->iflist_mtx
));
79 lockdep_assert_held(&local
->mtx
);
81 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
82 if (!ieee80211_sdata_running(sdata
)) {
83 sdata
->vif
.bss_conf
.idle
= true;
87 sdata
->old_idle
= sdata
->vif
.bss_conf
.idle
;
89 /* do not count disabled managed interfaces */
90 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
&&
91 !sdata
->u
.mgd
.associated
&&
92 !sdata
->u
.mgd
.auth_data
&&
93 !sdata
->u
.mgd
.assoc_data
) {
94 sdata
->vif
.bss_conf
.idle
= true;
97 /* do not count unused IBSS interfaces */
98 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
&&
99 !sdata
->u
.ibss
.ssid_len
) {
100 sdata
->vif
.bss_conf
.idle
= true;
104 if (sdata
->vif
.type
== NL80211_IFTYPE_P2P_DEVICE
)
107 /* count everything else */
108 sdata
->vif
.bss_conf
.idle
= false;
112 if (!local
->ops
->remain_on_channel
) {
113 list_for_each_entry(roc
, &local
->roc_list
, list
) {
115 roc
->sdata
->vif
.bss_conf
.idle
= false;
119 sdata
= rcu_dereference_protected(local
->scan_sdata
,
120 lockdep_is_held(&local
->mtx
));
121 if (sdata
&& !(local
->hw
.flags
& IEEE80211_HW_SCAN_WHILE_IDLE
)) {
123 sdata
->vif
.bss_conf
.idle
= false;
126 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
127 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
128 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
||
129 sdata
->vif
.type
== NL80211_IFTYPE_P2P_DEVICE
)
131 if (sdata
->old_idle
== sdata
->vif
.bss_conf
.idle
)
133 if (!ieee80211_sdata_running(sdata
))
135 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_IDLE
);
138 if (working
|| scanning
)
139 led_trig_start
|= IEEE80211_TPT_LEDTRIG_FL_WORK
;
141 led_trig_stop
|= IEEE80211_TPT_LEDTRIG_FL_WORK
;
144 led_trig_start
|= IEEE80211_TPT_LEDTRIG_FL_CONNECTED
;
146 led_trig_stop
|= IEEE80211_TPT_LEDTRIG_FL_CONNECTED
;
148 ieee80211_mod_tpt_led_trig(local
, led_trig_start
, led_trig_stop
);
151 return ieee80211_idle_off(local
, "working");
153 return ieee80211_idle_off(local
, "scanning");
155 return ieee80211_idle_on(local
);
157 return ieee80211_idle_off(local
, "in use");
162 void ieee80211_recalc_idle(struct ieee80211_local
*local
)
166 mutex_lock(&local
->iflist_mtx
);
167 chg
= __ieee80211_recalc_idle(local
);
168 mutex_unlock(&local
->iflist_mtx
);
170 ieee80211_hw_config(local
, chg
);
173 static int ieee80211_change_mtu(struct net_device
*dev
, int new_mtu
)
176 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
178 meshhdrlen
= (sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
) ? 5 : 0;
180 /* FIX: what would be proper limits for MTU?
181 * This interface uses 802.3 frames. */
183 new_mtu
> IEEE80211_MAX_DATA_LEN
- 24 - 6 - meshhdrlen
) {
191 static int ieee80211_change_mac(struct net_device
*dev
, void *addr
)
193 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
194 struct sockaddr
*sa
= addr
;
197 if (ieee80211_sdata_running(sdata
))
200 ret
= eth_mac_addr(dev
, sa
);
203 memcpy(sdata
->vif
.addr
, sa
->sa_data
, ETH_ALEN
);
208 static inline int identical_mac_addr_allowed(int type1
, int type2
)
210 return type1
== NL80211_IFTYPE_MONITOR
||
211 type2
== NL80211_IFTYPE_MONITOR
||
212 type1
== NL80211_IFTYPE_P2P_DEVICE
||
213 type2
== NL80211_IFTYPE_P2P_DEVICE
||
214 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_WDS
) ||
215 (type1
== NL80211_IFTYPE_WDS
&&
216 (type2
== NL80211_IFTYPE_WDS
||
217 type2
== NL80211_IFTYPE_AP
)) ||
218 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_AP_VLAN
) ||
219 (type1
== NL80211_IFTYPE_AP_VLAN
&&
220 (type2
== NL80211_IFTYPE_AP
||
221 type2
== NL80211_IFTYPE_AP_VLAN
));
224 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data
*sdata
,
225 enum nl80211_iftype iftype
)
227 struct ieee80211_local
*local
= sdata
->local
;
228 struct ieee80211_sub_if_data
*nsdata
;
232 /* we hold the RTNL here so can safely walk the list */
233 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
234 if (nsdata
!= sdata
&& ieee80211_sdata_running(nsdata
)) {
236 * Allow only a single IBSS interface to be up at any
237 * time. This is restricted because beacon distribution
238 * cannot work properly if both are in the same IBSS.
240 * To remove this restriction we'd have to disallow them
241 * from setting the same SSID on different IBSS interfaces
242 * belonging to the same hardware. Then, however, we're
243 * faced with having to adopt two different TSF timers...
245 if (iftype
== NL80211_IFTYPE_ADHOC
&&
246 nsdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
250 * The remaining checks are only performed for interfaces
251 * with the same MAC address.
253 if (!ether_addr_equal(sdata
->vif
.addr
,
258 * check whether it may have the same address
260 if (!identical_mac_addr_allowed(iftype
,
265 * can only add VLANs to enabled APs
267 if (iftype
== NL80211_IFTYPE_AP_VLAN
&&
268 nsdata
->vif
.type
== NL80211_IFTYPE_AP
)
269 sdata
->bss
= &nsdata
->u
.ap
;
276 static int ieee80211_check_queues(struct ieee80211_sub_if_data
*sdata
)
278 int n_queues
= sdata
->local
->hw
.queues
;
281 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
) {
282 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
283 if (WARN_ON_ONCE(sdata
->vif
.hw_queue
[i
] ==
284 IEEE80211_INVAL_HW_QUEUE
))
286 if (WARN_ON_ONCE(sdata
->vif
.hw_queue
[i
] >=
292 if ((sdata
->vif
.type
!= NL80211_IFTYPE_AP
) ||
293 !(sdata
->local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)) {
294 sdata
->vif
.cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
298 if (WARN_ON_ONCE(sdata
->vif
.cab_queue
== IEEE80211_INVAL_HW_QUEUE
))
301 if (WARN_ON_ONCE(sdata
->vif
.cab_queue
>= n_queues
))
307 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data
*sdata
,
310 struct ieee80211_local
*local
= sdata
->local
;
311 u32 flags
= sdata
->u
.mntr_flags
;
313 #define ADJUST(_f, _s) do { \
314 if (flags & MONITOR_FLAG_##_f) \
315 local->fif_##_s += offset; \
318 ADJUST(FCSFAIL
, fcsfail
);
319 ADJUST(PLCPFAIL
, plcpfail
);
320 ADJUST(CONTROL
, control
);
321 ADJUST(CONTROL
, pspoll
);
322 ADJUST(OTHER_BSS
, other_bss
);
327 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data
*sdata
)
329 struct ieee80211_local
*local
= sdata
->local
;
332 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
333 if (local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)
334 sdata
->vif
.hw_queue
[i
] = IEEE80211_INVAL_HW_QUEUE
;
335 else if (local
->hw
.queues
>= IEEE80211_NUM_ACS
)
336 sdata
->vif
.hw_queue
[i
] = i
;
338 sdata
->vif
.hw_queue
[i
] = 0;
340 sdata
->vif
.cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
343 static int ieee80211_add_virtual_monitor(struct ieee80211_local
*local
)
345 struct ieee80211_sub_if_data
*sdata
;
348 if (!(local
->hw
.flags
& IEEE80211_HW_WANT_MONITOR_VIF
))
351 mutex_lock(&local
->iflist_mtx
);
353 if (local
->monitor_sdata
)
356 sdata
= kzalloc(sizeof(*sdata
) + local
->hw
.vif_data_size
, GFP_KERNEL
);
363 sdata
->local
= local
;
364 sdata
->vif
.type
= NL80211_IFTYPE_MONITOR
;
365 snprintf(sdata
->name
, IFNAMSIZ
, "%s-monitor",
366 wiphy_name(local
->hw
.wiphy
));
368 ieee80211_set_default_queues(sdata
);
370 ret
= drv_add_interface(local
, sdata
);
372 /* ok .. stupid driver, it asked for this! */
377 ret
= ieee80211_check_queues(sdata
);
383 ret
= ieee80211_vif_use_channel(sdata
, local
->monitor_channel
,
384 local
->monitor_channel_type
,
385 IEEE80211_CHANCTX_EXCLUSIVE
);
387 drv_remove_interface(local
, sdata
);
392 rcu_assign_pointer(local
->monitor_sdata
, sdata
);
394 mutex_unlock(&local
->iflist_mtx
);
398 static void ieee80211_del_virtual_monitor(struct ieee80211_local
*local
)
400 struct ieee80211_sub_if_data
*sdata
;
402 if (!(local
->hw
.flags
& IEEE80211_HW_WANT_MONITOR_VIF
))
405 mutex_lock(&local
->iflist_mtx
);
407 sdata
= rcu_dereference_protected(local
->monitor_sdata
,
408 lockdep_is_held(&local
->iflist_mtx
));
412 rcu_assign_pointer(local
->monitor_sdata
, NULL
);
415 ieee80211_vif_release_channel(sdata
);
417 drv_remove_interface(local
, sdata
);
421 mutex_unlock(&local
->iflist_mtx
);
425 * NOTE: Be very careful when changing this function, it must NOT return
426 * an error on interface type changes that have been pre-checked, so most
427 * checks should be in ieee80211_check_concurrent_iface.
429 int ieee80211_do_open(struct wireless_dev
*wdev
, bool coming_up
)
431 struct ieee80211_sub_if_data
*sdata
= IEEE80211_WDEV_TO_SUB_IF(wdev
);
432 struct net_device
*dev
= wdev
->netdev
;
433 struct ieee80211_local
*local
= sdata
->local
;
434 struct sta_info
*sta
;
437 u32 hw_reconf_flags
= 0;
439 switch (sdata
->vif
.type
) {
440 case NL80211_IFTYPE_WDS
:
441 if (!is_valid_ether_addr(sdata
->u
.wds
.remote_addr
))
444 case NL80211_IFTYPE_AP_VLAN
: {
445 struct ieee80211_sub_if_data
*master
;
450 list_add(&sdata
->u
.vlan
.list
, &sdata
->bss
->vlans
);
452 master
= container_of(sdata
->bss
,
453 struct ieee80211_sub_if_data
, u
.ap
);
454 sdata
->control_port_protocol
=
455 master
->control_port_protocol
;
456 sdata
->control_port_no_encrypt
=
457 master
->control_port_no_encrypt
;
460 case NL80211_IFTYPE_AP
:
461 sdata
->bss
= &sdata
->u
.ap
;
463 case NL80211_IFTYPE_MESH_POINT
:
464 case NL80211_IFTYPE_STATION
:
465 case NL80211_IFTYPE_MONITOR
:
466 case NL80211_IFTYPE_ADHOC
:
467 case NL80211_IFTYPE_P2P_DEVICE
:
468 /* no special treatment */
470 case NL80211_IFTYPE_UNSPECIFIED
:
471 case NUM_NL80211_IFTYPES
:
472 case NL80211_IFTYPE_P2P_CLIENT
:
473 case NL80211_IFTYPE_P2P_GO
:
479 if (local
->open_count
== 0) {
480 res
= drv_start(local
);
483 if (local
->ops
->napi_poll
)
484 napi_enable(&local
->napi
);
485 /* we're brought up, everything changes */
486 hw_reconf_flags
= ~0;
487 ieee80211_led_radio(local
, true);
488 ieee80211_mod_tpt_led_trig(local
,
489 IEEE80211_TPT_LEDTRIG_FL_RADIO
, 0);
493 * Copy the hopefully now-present MAC address to
494 * this interface, if it has the special null one.
496 if (dev
&& is_zero_ether_addr(dev
->dev_addr
)) {
497 memcpy(dev
->dev_addr
,
498 local
->hw
.wiphy
->perm_addr
,
500 memcpy(dev
->perm_addr
, dev
->dev_addr
, ETH_ALEN
);
502 if (!is_valid_ether_addr(dev
->dev_addr
)) {
503 res
= -EADDRNOTAVAIL
;
508 switch (sdata
->vif
.type
) {
509 case NL80211_IFTYPE_AP_VLAN
:
510 /* no need to tell driver, but set carrier */
511 if (rtnl_dereference(sdata
->bss
->beacon
))
512 netif_carrier_on(dev
);
514 netif_carrier_off(dev
);
516 case NL80211_IFTYPE_MONITOR
:
517 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
518 local
->cooked_mntrs
++;
522 if (local
->monitors
== 0 && local
->open_count
== 0) {
523 res
= ieee80211_add_virtual_monitor(local
);
528 /* must be before the call to ieee80211_configure_filter */
530 if (local
->monitors
== 1) {
531 local
->hw
.conf
.flags
|= IEEE80211_CONF_MONITOR
;
532 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
535 ieee80211_adjust_monitor_flags(sdata
, 1);
536 ieee80211_configure_filter(local
);
538 netif_carrier_on(dev
);
542 ieee80211_del_virtual_monitor(local
);
544 res
= drv_add_interface(local
, sdata
);
547 res
= ieee80211_check_queues(sdata
);
549 goto err_del_interface
;
552 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
554 local
->fif_probe_req
++;
556 ieee80211_configure_filter(local
);
557 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
558 local
->fif_probe_req
++;
561 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
)
562 changed
|= ieee80211_reset_erp_info(sdata
);
563 ieee80211_bss_info_change_notify(sdata
, changed
);
565 switch (sdata
->vif
.type
) {
566 case NL80211_IFTYPE_STATION
:
567 case NL80211_IFTYPE_ADHOC
:
568 case NL80211_IFTYPE_AP
:
569 case NL80211_IFTYPE_MESH_POINT
:
570 netif_carrier_off(dev
);
572 case NL80211_IFTYPE_WDS
:
573 case NL80211_IFTYPE_P2P_DEVICE
:
576 netif_carrier_on(dev
);
580 * set default queue parameters so drivers don't
581 * need to initialise the hardware if the hardware
582 * doesn't start up with sane defaults
584 ieee80211_set_wmm_default(sdata
, true);
587 set_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
589 if (sdata
->vif
.type
== NL80211_IFTYPE_WDS
) {
590 /* Create STA entry for the WDS peer */
591 sta
= sta_info_alloc(sdata
, sdata
->u
.wds
.remote_addr
,
595 goto err_del_interface
;
598 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTH
);
599 sta_info_pre_move_state(sta
, IEEE80211_STA_ASSOC
);
600 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
602 res
= sta_info_insert(sta
);
604 /* STA has been freed */
605 goto err_del_interface
;
608 rate_control_rate_init(sta
);
609 netif_carrier_on(dev
);
610 } else if (sdata
->vif
.type
== NL80211_IFTYPE_P2P_DEVICE
) {
611 rcu_assign_pointer(local
->p2p_sdata
, sdata
);
615 * set_multicast_list will be invoked by the networking core
616 * which will check whether any increments here were done in
617 * error and sync them down to the hardware as filter flags.
619 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
620 atomic_inc(&local
->iff_allmultis
);
622 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
623 atomic_inc(&local
->iff_promiscs
);
625 mutex_lock(&local
->mtx
);
626 hw_reconf_flags
|= __ieee80211_recalc_idle(local
);
627 mutex_unlock(&local
->mtx
);
633 ieee80211_hw_config(local
, hw_reconf_flags
);
635 ieee80211_recalc_ps(local
, -1);
638 netif_tx_start_all_queues(dev
);
642 drv_remove_interface(local
, sdata
);
644 if (!local
->open_count
)
648 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
649 list_del(&sdata
->u
.vlan
.list
);
650 /* might already be clear but that doesn't matter */
651 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
655 static int ieee80211_open(struct net_device
*dev
)
657 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
660 /* fail early if user set an invalid address */
661 if (!is_valid_ether_addr(dev
->dev_addr
))
662 return -EADDRNOTAVAIL
;
664 err
= ieee80211_check_concurrent_iface(sdata
, sdata
->vif
.type
);
668 return ieee80211_do_open(&sdata
->wdev
, true);
671 static void ieee80211_do_stop(struct ieee80211_sub_if_data
*sdata
,
674 struct ieee80211_local
*local
= sdata
->local
;
676 struct sk_buff
*skb
, *tmp
;
677 u32 hw_reconf_flags
= 0;
680 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
682 if (rcu_access_pointer(local
->scan_sdata
) == sdata
)
683 ieee80211_scan_cancel(local
);
686 * Stop TX on this interface first.
689 netif_tx_stop_all_queues(sdata
->dev
);
691 ieee80211_roc_purge(sdata
);
694 * Remove all stations associated with this interface.
696 * This must be done before calling ops->remove_interface()
697 * because otherwise we can later invoke ops->sta_notify()
698 * whenever the STAs are removed, and that invalidates driver
699 * assumptions about always getting a vif pointer that is valid
700 * (because if we remove a STA after ops->remove_interface()
701 * the driver will have removed the vif info already!)
703 * This is relevant only in AP, WDS and mesh modes, since in
704 * all other modes we've already removed all stations when
707 sta_info_flush(local
, sdata
);
710 * Don't count this interface for promisc/allmulti while it
711 * is down. dev_mc_unsync() will invoke set_multicast_list
712 * on the master interface which will sync these down to the
713 * hardware as filter flags.
715 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
716 atomic_dec(&local
->iff_allmultis
);
718 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
719 atomic_dec(&local
->iff_promiscs
);
721 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
723 local
->fif_probe_req
--;
724 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
725 local
->fif_probe_req
--;
729 netif_addr_lock_bh(sdata
->dev
);
730 spin_lock_bh(&local
->filter_lock
);
731 __hw_addr_unsync(&local
->mc_list
, &sdata
->dev
->mc
,
732 sdata
->dev
->addr_len
);
733 spin_unlock_bh(&local
->filter_lock
);
734 netif_addr_unlock_bh(sdata
->dev
);
736 ieee80211_configure_filter(local
);
739 del_timer_sync(&local
->dynamic_ps_timer
);
740 cancel_work_sync(&local
->dynamic_ps_enable_work
);
742 /* APs need special treatment */
743 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
744 struct ieee80211_sub_if_data
*vlan
, *tmpsdata
;
745 struct beacon_data
*old_beacon
=
746 rtnl_dereference(sdata
->u
.ap
.beacon
);
747 struct probe_resp
*old_probe_resp
=
748 rtnl_dereference(sdata
->u
.ap
.probe_resp
);
750 /* sdata_running will return false, so this will disable */
751 ieee80211_bss_info_change_notify(sdata
,
752 BSS_CHANGED_BEACON_ENABLED
);
754 /* remove beacon and probe response */
755 RCU_INIT_POINTER(sdata
->u
.ap
.beacon
, NULL
);
756 RCU_INIT_POINTER(sdata
->u
.ap
.probe_resp
, NULL
);
759 kfree(old_probe_resp
);
761 /* down all dependent devices, that is VLANs */
762 list_for_each_entry_safe(vlan
, tmpsdata
, &sdata
->u
.ap
.vlans
,
764 dev_close(vlan
->dev
);
765 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
767 /* free all potentially still buffered bcast frames */
768 local
->total_ps_buffered
-= skb_queue_len(&sdata
->u
.ap
.ps_bc_buf
);
769 skb_queue_purge(&sdata
->u
.ap
.ps_bc_buf
);
770 } else if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
771 ieee80211_mgd_stop(sdata
);
777 switch (sdata
->vif
.type
) {
778 case NL80211_IFTYPE_AP_VLAN
:
779 list_del(&sdata
->u
.vlan
.list
);
780 /* no need to tell driver */
782 case NL80211_IFTYPE_MONITOR
:
783 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
784 local
->cooked_mntrs
--;
789 if (local
->monitors
== 0) {
790 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_MONITOR
;
791 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
792 ieee80211_del_virtual_monitor(local
);
795 ieee80211_adjust_monitor_flags(sdata
, -1);
796 ieee80211_configure_filter(local
);
798 case NL80211_IFTYPE_P2P_DEVICE
:
799 /* relies on synchronize_rcu() below */
800 rcu_assign_pointer(local
->p2p_sdata
, NULL
);
803 flush_work(&sdata
->work
);
805 * When we get here, the interface is marked down.
806 * Call rcu_barrier() to wait both for the RX path
807 * should it be using the interface and enqueuing
808 * frames at this very time on another CPU, and
809 * for the sta free call_rcu callbacks.
814 * free_sta_rcu() enqueues a work for the actual
815 * sta cleanup, so we need to flush it while
816 * sdata is still valid.
818 flush_workqueue(local
->workqueue
);
820 skb_queue_purge(&sdata
->skb_queue
);
823 * Free all remaining keys, there shouldn't be any,
824 * except maybe group keys in AP more or WDS?
826 ieee80211_free_keys(sdata
);
829 drv_remove_interface(local
, sdata
);
834 mutex_lock(&local
->mtx
);
835 hw_reconf_flags
|= __ieee80211_recalc_idle(local
);
836 mutex_unlock(&local
->mtx
);
838 ieee80211_recalc_ps(local
, -1);
840 if (local
->open_count
== 0) {
841 if (local
->ops
->napi_poll
)
842 napi_disable(&local
->napi
);
843 ieee80211_clear_tx_pending(local
);
844 ieee80211_stop_device(local
);
846 /* no reconfiguring after stop! */
850 /* do after stop to avoid reconfiguring when we stop anyway */
852 ieee80211_hw_config(local
, hw_reconf_flags
);
854 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
855 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
856 skb_queue_walk_safe(&local
->pending
[i
], skb
, tmp
) {
857 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
858 if (info
->control
.vif
== &sdata
->vif
) {
859 __skb_unlink(skb
, &local
->pending
[i
]);
860 dev_kfree_skb_irq(skb
);
864 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
866 if (local
->monitors
== local
->open_count
&& local
->monitors
> 0)
867 ieee80211_add_virtual_monitor(local
);
870 static int ieee80211_stop(struct net_device
*dev
)
872 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
874 ieee80211_do_stop(sdata
, true);
879 static void ieee80211_set_multicast_list(struct net_device
*dev
)
881 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
882 struct ieee80211_local
*local
= sdata
->local
;
883 int allmulti
, promisc
, sdata_allmulti
, sdata_promisc
;
885 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
886 promisc
= !!(dev
->flags
& IFF_PROMISC
);
887 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
888 sdata_promisc
= !!(sdata
->flags
& IEEE80211_SDATA_PROMISC
);
890 if (allmulti
!= sdata_allmulti
) {
891 if (dev
->flags
& IFF_ALLMULTI
)
892 atomic_inc(&local
->iff_allmultis
);
894 atomic_dec(&local
->iff_allmultis
);
895 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
898 if (promisc
!= sdata_promisc
) {
899 if (dev
->flags
& IFF_PROMISC
)
900 atomic_inc(&local
->iff_promiscs
);
902 atomic_dec(&local
->iff_promiscs
);
903 sdata
->flags
^= IEEE80211_SDATA_PROMISC
;
905 spin_lock_bh(&local
->filter_lock
);
906 __hw_addr_sync(&local
->mc_list
, &dev
->mc
, dev
->addr_len
);
907 spin_unlock_bh(&local
->filter_lock
);
908 ieee80211_queue_work(&local
->hw
, &local
->reconfig_filter
);
912 * Called when the netdev is removed or, by the code below, before
913 * the interface type changes.
915 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data
*sdata
)
917 struct ieee80211_local
*local
= sdata
->local
;
921 /* free extra data */
922 ieee80211_free_keys(sdata
);
924 ieee80211_debugfs_remove_netdev(sdata
);
926 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
927 __skb_queue_purge(&sdata
->fragments
[i
].skb_list
);
928 sdata
->fragment_next
= 0;
930 if (ieee80211_vif_is_mesh(&sdata
->vif
))
931 mesh_rmc_free(sdata
);
933 flushed
= sta_info_flush(local
, sdata
);
937 static void ieee80211_uninit(struct net_device
*dev
)
939 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev
));
942 static u16
ieee80211_netdev_select_queue(struct net_device
*dev
,
945 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev
), skb
);
948 static const struct net_device_ops ieee80211_dataif_ops
= {
949 .ndo_open
= ieee80211_open
,
950 .ndo_stop
= ieee80211_stop
,
951 .ndo_uninit
= ieee80211_uninit
,
952 .ndo_start_xmit
= ieee80211_subif_start_xmit
,
953 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
954 .ndo_change_mtu
= ieee80211_change_mtu
,
955 .ndo_set_mac_address
= ieee80211_change_mac
,
956 .ndo_select_queue
= ieee80211_netdev_select_queue
,
959 static u16
ieee80211_monitor_select_queue(struct net_device
*dev
,
962 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
963 struct ieee80211_local
*local
= sdata
->local
;
964 struct ieee80211_hdr
*hdr
;
965 struct ieee80211_radiotap_header
*rtap
= (void *)skb
->data
;
967 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
971 skb
->len
< le16_to_cpu(rtap
->it_len
) + 2 /* frame control */)
972 return 0; /* doesn't matter, frame will be dropped */
974 hdr
= (void *)((u8
*)skb
->data
+ le16_to_cpu(rtap
->it_len
));
976 return ieee80211_select_queue_80211(sdata
, skb
, hdr
);
979 static const struct net_device_ops ieee80211_monitorif_ops
= {
980 .ndo_open
= ieee80211_open
,
981 .ndo_stop
= ieee80211_stop
,
982 .ndo_uninit
= ieee80211_uninit
,
983 .ndo_start_xmit
= ieee80211_monitor_start_xmit
,
984 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
985 .ndo_change_mtu
= ieee80211_change_mtu
,
986 .ndo_set_mac_address
= eth_mac_addr
,
987 .ndo_select_queue
= ieee80211_monitor_select_queue
,
990 static void ieee80211_if_setup(struct net_device
*dev
)
993 dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
994 dev
->netdev_ops
= &ieee80211_dataif_ops
;
995 dev
->destructor
= free_netdev
;
998 static void ieee80211_iface_work(struct work_struct
*work
)
1000 struct ieee80211_sub_if_data
*sdata
=
1001 container_of(work
, struct ieee80211_sub_if_data
, work
);
1002 struct ieee80211_local
*local
= sdata
->local
;
1003 struct sk_buff
*skb
;
1004 struct sta_info
*sta
;
1005 struct ieee80211_ra_tid
*ra_tid
;
1007 if (!ieee80211_sdata_running(sdata
))
1010 if (local
->scanning
)
1014 * ieee80211_queue_work() should have picked up most cases,
1015 * here we'll pick the rest.
1017 if (WARN(local
->suspended
,
1018 "interface work scheduled while going to suspend\n"))
1021 /* first process frames */
1022 while ((skb
= skb_dequeue(&sdata
->skb_queue
))) {
1023 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
1025 if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_START
) {
1026 ra_tid
= (void *)&skb
->cb
;
1027 ieee80211_start_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
1029 } else if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_STOP
) {
1030 ra_tid
= (void *)&skb
->cb
;
1031 ieee80211_stop_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
1033 } else if (ieee80211_is_action(mgmt
->frame_control
) &&
1034 mgmt
->u
.action
.category
== WLAN_CATEGORY_BACK
) {
1037 mutex_lock(&local
->sta_mtx
);
1038 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
1040 switch (mgmt
->u
.action
.u
.addba_req
.action_code
) {
1041 case WLAN_ACTION_ADDBA_REQ
:
1042 ieee80211_process_addba_request(
1043 local
, sta
, mgmt
, len
);
1045 case WLAN_ACTION_ADDBA_RESP
:
1046 ieee80211_process_addba_resp(local
, sta
,
1049 case WLAN_ACTION_DELBA
:
1050 ieee80211_process_delba(sdata
, sta
,
1058 mutex_unlock(&local
->sta_mtx
);
1059 } else if (ieee80211_is_data_qos(mgmt
->frame_control
)) {
1060 struct ieee80211_hdr
*hdr
= (void *)mgmt
;
1062 * So the frame isn't mgmt, but frame_control
1063 * is at the right place anyway, of course, so
1064 * the if statement is correct.
1066 * Warn if we have other data frame types here,
1067 * they must not get here.
1069 WARN_ON(hdr
->frame_control
&
1070 cpu_to_le16(IEEE80211_STYPE_NULLFUNC
));
1071 WARN_ON(!(hdr
->seq_ctrl
&
1072 cpu_to_le16(IEEE80211_SCTL_FRAG
)));
1074 * This was a fragment of a frame, received while
1075 * a block-ack session was active. That cannot be
1076 * right, so terminate the session.
1078 mutex_lock(&local
->sta_mtx
);
1079 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
1081 u16 tid
= *ieee80211_get_qos_ctl(hdr
) &
1082 IEEE80211_QOS_CTL_TID_MASK
;
1084 __ieee80211_stop_rx_ba_session(
1085 sta
, tid
, WLAN_BACK_RECIPIENT
,
1086 WLAN_REASON_QSTA_REQUIRE_SETUP
,
1089 mutex_unlock(&local
->sta_mtx
);
1090 } else switch (sdata
->vif
.type
) {
1091 case NL80211_IFTYPE_STATION
:
1092 ieee80211_sta_rx_queued_mgmt(sdata
, skb
);
1094 case NL80211_IFTYPE_ADHOC
:
1095 ieee80211_ibss_rx_queued_mgmt(sdata
, skb
);
1097 case NL80211_IFTYPE_MESH_POINT
:
1098 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
1100 ieee80211_mesh_rx_queued_mgmt(sdata
, skb
);
1103 WARN(1, "frame for unexpected interface type");
1110 /* then other type-dependent work */
1111 switch (sdata
->vif
.type
) {
1112 case NL80211_IFTYPE_STATION
:
1113 ieee80211_sta_work(sdata
);
1115 case NL80211_IFTYPE_ADHOC
:
1116 ieee80211_ibss_work(sdata
);
1118 case NL80211_IFTYPE_MESH_POINT
:
1119 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
1121 ieee80211_mesh_work(sdata
);
1130 * Helper function to initialise an interface to a specific type.
1132 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data
*sdata
,
1133 enum nl80211_iftype type
)
1135 /* clear type-dependent union */
1136 memset(&sdata
->u
, 0, sizeof(sdata
->u
));
1138 /* and set some type-dependent values */
1139 sdata
->vif
.type
= type
;
1140 sdata
->vif
.p2p
= false;
1141 sdata
->wdev
.iftype
= type
;
1143 sdata
->control_port_protocol
= cpu_to_be16(ETH_P_PAE
);
1144 sdata
->control_port_no_encrypt
= false;
1146 sdata
->noack_map
= 0;
1148 /* only monitor/p2p-device differ */
1150 sdata
->dev
->netdev_ops
= &ieee80211_dataif_ops
;
1151 sdata
->dev
->type
= ARPHRD_ETHER
;
1154 skb_queue_head_init(&sdata
->skb_queue
);
1155 INIT_WORK(&sdata
->work
, ieee80211_iface_work
);
1158 case NL80211_IFTYPE_P2P_GO
:
1159 type
= NL80211_IFTYPE_AP
;
1160 sdata
->vif
.type
= type
;
1161 sdata
->vif
.p2p
= true;
1163 case NL80211_IFTYPE_AP
:
1164 skb_queue_head_init(&sdata
->u
.ap
.ps_bc_buf
);
1165 INIT_LIST_HEAD(&sdata
->u
.ap
.vlans
);
1167 case NL80211_IFTYPE_P2P_CLIENT
:
1168 type
= NL80211_IFTYPE_STATION
;
1169 sdata
->vif
.type
= type
;
1170 sdata
->vif
.p2p
= true;
1172 case NL80211_IFTYPE_STATION
:
1173 ieee80211_sta_setup_sdata(sdata
);
1175 case NL80211_IFTYPE_ADHOC
:
1176 ieee80211_ibss_setup_sdata(sdata
);
1178 case NL80211_IFTYPE_MESH_POINT
:
1179 if (ieee80211_vif_is_mesh(&sdata
->vif
))
1180 ieee80211_mesh_init_sdata(sdata
);
1182 case NL80211_IFTYPE_MONITOR
:
1183 sdata
->dev
->type
= ARPHRD_IEEE80211_RADIOTAP
;
1184 sdata
->dev
->netdev_ops
= &ieee80211_monitorif_ops
;
1185 sdata
->u
.mntr_flags
= MONITOR_FLAG_CONTROL
|
1186 MONITOR_FLAG_OTHER_BSS
;
1188 case NL80211_IFTYPE_WDS
:
1189 case NL80211_IFTYPE_AP_VLAN
:
1190 case NL80211_IFTYPE_P2P_DEVICE
:
1192 case NL80211_IFTYPE_UNSPECIFIED
:
1193 case NUM_NL80211_IFTYPES
:
1198 ieee80211_debugfs_add_netdev(sdata
);
1201 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data
*sdata
,
1202 enum nl80211_iftype type
)
1204 struct ieee80211_local
*local
= sdata
->local
;
1206 enum nl80211_iftype internal_type
= type
;
1211 if (!local
->ops
->change_interface
)
1214 switch (sdata
->vif
.type
) {
1215 case NL80211_IFTYPE_AP
:
1216 case NL80211_IFTYPE_STATION
:
1217 case NL80211_IFTYPE_ADHOC
:
1219 * Could maybe also all others here?
1220 * Just not sure how that interacts
1221 * with the RX/config path e.g. for
1230 case NL80211_IFTYPE_AP
:
1231 case NL80211_IFTYPE_STATION
:
1232 case NL80211_IFTYPE_ADHOC
:
1234 * Could probably support everything
1235 * but WDS here (WDS do_open can fail
1236 * under memory pressure, which this
1237 * code isn't prepared to handle).
1240 case NL80211_IFTYPE_P2P_CLIENT
:
1242 internal_type
= NL80211_IFTYPE_STATION
;
1244 case NL80211_IFTYPE_P2P_GO
:
1246 internal_type
= NL80211_IFTYPE_AP
;
1252 ret
= ieee80211_check_concurrent_iface(sdata
, internal_type
);
1256 ieee80211_do_stop(sdata
, false);
1258 ieee80211_teardown_sdata(sdata
);
1260 ret
= drv_change_interface(local
, sdata
, internal_type
, p2p
);
1262 type
= sdata
->vif
.type
;
1265 * Ignore return value here, there's not much we can do since
1266 * the driver changed the interface type internally already.
1267 * The warnings will hopefully make driver authors fix it :-)
1269 ieee80211_check_queues(sdata
);
1271 ieee80211_setup_sdata(sdata
, type
);
1273 err
= ieee80211_do_open(&sdata
->wdev
, false);
1274 WARN(err
, "type change: do_open returned %d", err
);
1279 int ieee80211_if_change_type(struct ieee80211_sub_if_data
*sdata
,
1280 enum nl80211_iftype type
)
1286 if (type
== ieee80211_vif_type_p2p(&sdata
->vif
))
1289 if (ieee80211_sdata_running(sdata
)) {
1290 ret
= ieee80211_runtime_change_iftype(sdata
, type
);
1294 /* Purge and reset type-dependent state. */
1295 ieee80211_teardown_sdata(sdata
);
1296 ieee80211_setup_sdata(sdata
, type
);
1299 /* reset some values that shouldn't be kept across type changes */
1300 sdata
->drop_unencrypted
= 0;
1301 if (type
== NL80211_IFTYPE_STATION
)
1302 sdata
->u
.mgd
.use_4addr
= false;
1307 static void ieee80211_assign_perm_addr(struct ieee80211_local
*local
,
1308 u8
*perm_addr
, enum nl80211_iftype type
)
1310 struct ieee80211_sub_if_data
*sdata
;
1311 u64 mask
, start
, addr
, val
, inc
;
1313 u8 tmp_addr
[ETH_ALEN
];
1316 /* default ... something at least */
1317 memcpy(perm_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
1319 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
) &&
1320 local
->hw
.wiphy
->n_addresses
<= 1)
1323 mutex_lock(&local
->iflist_mtx
);
1326 case NL80211_IFTYPE_MONITOR
:
1327 /* doesn't matter */
1329 case NL80211_IFTYPE_WDS
:
1330 case NL80211_IFTYPE_AP_VLAN
:
1331 /* match up with an AP interface */
1332 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1333 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
1335 memcpy(perm_addr
, sdata
->vif
.addr
, ETH_ALEN
);
1338 /* keep default if no AP interface present */
1340 case NL80211_IFTYPE_P2P_CLIENT
:
1341 case NL80211_IFTYPE_P2P_GO
:
1342 if (local
->hw
.flags
& IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF
) {
1343 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1344 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
)
1346 if (!ieee80211_sdata_running(sdata
))
1348 memcpy(perm_addr
, sdata
->vif
.addr
, ETH_ALEN
);
1352 /* otherwise fall through */
1354 /* assign a new address if possible -- try n_addresses first */
1355 for (i
= 0; i
< local
->hw
.wiphy
->n_addresses
; i
++) {
1358 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1359 if (memcmp(local
->hw
.wiphy
->addresses
[i
].addr
,
1360 sdata
->vif
.addr
, ETH_ALEN
) == 0) {
1368 local
->hw
.wiphy
->addresses
[i
].addr
,
1374 /* try mask if available */
1375 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
))
1378 m
= local
->hw
.wiphy
->addr_mask
;
1379 mask
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1380 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1381 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1383 if (__ffs64(mask
) + hweight64(mask
) != fls64(mask
)) {
1384 /* not a contiguous mask ... not handled now! */
1385 pr_info("not contiguous\n");
1389 m
= local
->hw
.wiphy
->perm_addr
;
1390 start
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1391 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1392 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1394 inc
= 1ULL<<__ffs64(mask
);
1395 val
= (start
& mask
);
1396 addr
= (start
& ~mask
) | (val
& mask
);
1400 tmp_addr
[5] = addr
>> 0*8;
1401 tmp_addr
[4] = addr
>> 1*8;
1402 tmp_addr
[3] = addr
>> 2*8;
1403 tmp_addr
[2] = addr
>> 3*8;
1404 tmp_addr
[1] = addr
>> 4*8;
1405 tmp_addr
[0] = addr
>> 5*8;
1409 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1410 if (memcmp(tmp_addr
, sdata
->vif
.addr
,
1418 memcpy(perm_addr
, tmp_addr
, ETH_ALEN
);
1421 addr
= (start
& ~mask
) | (val
& mask
);
1422 } while (addr
!= start
);
1428 mutex_unlock(&local
->iflist_mtx
);
1431 int ieee80211_if_add(struct ieee80211_local
*local
, const char *name
,
1432 struct wireless_dev
**new_wdev
, enum nl80211_iftype type
,
1433 struct vif_params
*params
)
1435 struct net_device
*ndev
= NULL
;
1436 struct ieee80211_sub_if_data
*sdata
= NULL
;
1442 if (type
== NL80211_IFTYPE_P2P_DEVICE
) {
1443 struct wireless_dev
*wdev
;
1445 sdata
= kzalloc(sizeof(*sdata
) + local
->hw
.vif_data_size
,
1449 wdev
= &sdata
->wdev
;
1452 strlcpy(sdata
->name
, name
, IFNAMSIZ
);
1453 ieee80211_assign_perm_addr(local
, wdev
->address
, type
);
1454 memcpy(sdata
->vif
.addr
, wdev
->address
, ETH_ALEN
);
1456 if (local
->hw
.queues
>= IEEE80211_NUM_ACS
)
1457 txqs
= IEEE80211_NUM_ACS
;
1459 ndev
= alloc_netdev_mqs(sizeof(*sdata
) +
1460 local
->hw
.vif_data_size
,
1461 name
, ieee80211_if_setup
, txqs
, 1);
1464 dev_net_set(ndev
, wiphy_net(local
->hw
.wiphy
));
1466 ndev
->needed_headroom
= local
->tx_headroom
+
1467 4*6 /* four MAC addresses */
1468 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1470 + 8 /* rfc1042/bridge tunnel */
1471 - ETH_HLEN
/* ethernet hard_header_len */
1472 + IEEE80211_ENCRYPT_HEADROOM
;
1473 ndev
->needed_tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
1475 ret
= dev_alloc_name(ndev
, ndev
->name
);
1481 ieee80211_assign_perm_addr(local
, ndev
->perm_addr
, type
);
1482 memcpy(ndev
->dev_addr
, ndev
->perm_addr
, ETH_ALEN
);
1483 SET_NETDEV_DEV(ndev
, wiphy_dev(local
->hw
.wiphy
));
1485 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1486 sdata
= netdev_priv(ndev
);
1487 ndev
->ieee80211_ptr
= &sdata
->wdev
;
1488 memcpy(sdata
->vif
.addr
, ndev
->dev_addr
, ETH_ALEN
);
1489 memcpy(sdata
->name
, ndev
->name
, IFNAMSIZ
);
1494 /* initialise type-independent data */
1495 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
1496 sdata
->local
= local
;
1498 sdata
->arp_filter_state
= true;
1501 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
1502 skb_queue_head_init(&sdata
->fragments
[i
].skb_list
);
1504 INIT_LIST_HEAD(&sdata
->key_list
);
1506 for (i
= 0; i
< IEEE80211_NUM_BANDS
; i
++) {
1507 struct ieee80211_supported_band
*sband
;
1508 sband
= local
->hw
.wiphy
->bands
[i
];
1509 sdata
->rc_rateidx_mask
[i
] =
1510 sband
? (1 << sband
->n_bitrates
) - 1 : 0;
1512 memcpy(sdata
->rc_rateidx_mcs_mask
[i
],
1513 sband
->ht_cap
.mcs
.rx_mask
,
1514 sizeof(sdata
->rc_rateidx_mcs_mask
[i
]));
1516 memset(sdata
->rc_rateidx_mcs_mask
[i
], 0,
1517 sizeof(sdata
->rc_rateidx_mcs_mask
[i
]));
1520 ieee80211_set_default_queues(sdata
);
1522 /* setup type-dependent data */
1523 ieee80211_setup_sdata(sdata
, type
);
1527 ndev
->ieee80211_ptr
->use_4addr
= params
->use_4addr
;
1528 if (type
== NL80211_IFTYPE_STATION
)
1529 sdata
->u
.mgd
.use_4addr
= params
->use_4addr
;
1532 ndev
->features
|= local
->hw
.netdev_features
;
1534 ret
= register_netdevice(ndev
);
1541 mutex_lock(&local
->iflist_mtx
);
1542 list_add_tail_rcu(&sdata
->list
, &local
->interfaces
);
1543 mutex_unlock(&local
->iflist_mtx
);
1546 *new_wdev
= &sdata
->wdev
;
1551 void ieee80211_if_remove(struct ieee80211_sub_if_data
*sdata
)
1555 mutex_lock(&sdata
->local
->iflist_mtx
);
1556 list_del_rcu(&sdata
->list
);
1557 mutex_unlock(&sdata
->local
->iflist_mtx
);
1562 unregister_netdevice(sdata
->dev
);
1564 cfg80211_unregister_wdev(&sdata
->wdev
);
1569 void ieee80211_sdata_stop(struct ieee80211_sub_if_data
*sdata
)
1571 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING
, &sdata
->state
)))
1573 ieee80211_do_stop(sdata
, true);
1574 ieee80211_teardown_sdata(sdata
);
1578 * Remove all interfaces, may only be called at hardware unregistration
1579 * time because it doesn't do RCU-safe list removals.
1581 void ieee80211_remove_interfaces(struct ieee80211_local
*local
)
1583 struct ieee80211_sub_if_data
*sdata
, *tmp
;
1584 LIST_HEAD(unreg_list
);
1585 LIST_HEAD(wdev_list
);
1589 mutex_lock(&local
->iflist_mtx
);
1590 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
1591 list_del(&sdata
->list
);
1594 unregister_netdevice_queue(sdata
->dev
, &unreg_list
);
1596 list_add(&sdata
->list
, &wdev_list
);
1598 mutex_unlock(&local
->iflist_mtx
);
1599 unregister_netdevice_many(&unreg_list
);
1600 list_del(&unreg_list
);
1602 list_for_each_entry_safe(sdata
, tmp
, &wdev_list
, list
) {
1603 list_del(&sdata
->list
);
1604 cfg80211_unregister_wdev(&sdata
->wdev
);
1609 static int netdev_notify(struct notifier_block
*nb
,
1610 unsigned long state
,
1613 struct net_device
*dev
= ndev
;
1614 struct ieee80211_sub_if_data
*sdata
;
1616 if (state
!= NETDEV_CHANGENAME
)
1619 if (!dev
->ieee80211_ptr
|| !dev
->ieee80211_ptr
->wiphy
)
1622 if (dev
->ieee80211_ptr
->wiphy
->privid
!= mac80211_wiphy_privid
)
1625 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1627 memcpy(sdata
->name
, dev
->name
, IFNAMSIZ
);
1629 ieee80211_debugfs_rename_netdev(sdata
);
1633 static struct notifier_block mac80211_netdev_notifier
= {
1634 .notifier_call
= netdev_notify
,
1637 int ieee80211_iface_init(void)
1639 return register_netdevice_notifier(&mac80211_netdev_notifier
);
1642 void ieee80211_iface_exit(void)
1644 unregister_netdevice_notifier(&mac80211_netdev_notifier
);