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.
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
= chanctx_conf
->def
.chan
->max_power
;
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
,
84 if (!(local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
))
87 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_IDLE
;
88 return IEEE80211_CONF_CHANGE_IDLE
;
91 static u32
ieee80211_idle_on(struct ieee80211_local
*local
)
93 if (local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
)
96 drv_flush(local
, false);
98 local
->hw
.conf
.flags
|= IEEE80211_CONF_IDLE
;
99 return IEEE80211_CONF_CHANGE_IDLE
;
102 static u32
__ieee80211_recalc_idle(struct ieee80211_local
*local
)
104 struct ieee80211_sub_if_data
*sdata
;
106 bool working
= false, scanning
= false;
107 unsigned int led_trig_start
= 0, led_trig_stop
= 0;
108 struct ieee80211_roc_work
*roc
;
110 #ifdef CONFIG_PROVE_LOCKING
111 WARN_ON(debug_locks
&& !lockdep_rtnl_is_held() &&
112 !lockdep_is_held(&local
->iflist_mtx
));
114 lockdep_assert_held(&local
->mtx
);
116 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
117 if (!ieee80211_sdata_running(sdata
)) {
118 sdata
->vif
.bss_conf
.idle
= true;
122 sdata
->old_idle
= sdata
->vif
.bss_conf
.idle
;
124 /* do not count disabled managed interfaces */
125 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
&&
126 !sdata
->u
.mgd
.associated
&&
127 !sdata
->u
.mgd
.auth_data
&&
128 !sdata
->u
.mgd
.assoc_data
) {
129 sdata
->vif
.bss_conf
.idle
= true;
132 /* do not count unused IBSS interfaces */
133 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
&&
134 !sdata
->u
.ibss
.ssid_len
) {
135 sdata
->vif
.bss_conf
.idle
= true;
139 if (sdata
->vif
.type
== NL80211_IFTYPE_P2P_DEVICE
)
142 /* count everything else */
143 sdata
->vif
.bss_conf
.idle
= false;
147 if (!local
->ops
->remain_on_channel
) {
148 list_for_each_entry(roc
, &local
->roc_list
, list
) {
150 roc
->sdata
->vif
.bss_conf
.idle
= false;
154 sdata
= rcu_dereference_protected(local
->scan_sdata
,
155 lockdep_is_held(&local
->mtx
));
156 if (sdata
&& !(local
->hw
.flags
& IEEE80211_HW_SCAN_WHILE_IDLE
)) {
158 sdata
->vif
.bss_conf
.idle
= false;
161 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
162 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
163 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
||
164 sdata
->vif
.type
== NL80211_IFTYPE_P2P_DEVICE
)
166 if (sdata
->old_idle
== sdata
->vif
.bss_conf
.idle
)
168 if (!ieee80211_sdata_running(sdata
))
170 ieee80211_bss_info_change_notify(sdata
, BSS_CHANGED_IDLE
);
173 if (working
|| scanning
)
174 led_trig_start
|= IEEE80211_TPT_LEDTRIG_FL_WORK
;
176 led_trig_stop
|= IEEE80211_TPT_LEDTRIG_FL_WORK
;
179 led_trig_start
|= IEEE80211_TPT_LEDTRIG_FL_CONNECTED
;
181 led_trig_stop
|= IEEE80211_TPT_LEDTRIG_FL_CONNECTED
;
183 ieee80211_mod_tpt_led_trig(local
, led_trig_start
, led_trig_stop
);
186 return ieee80211_idle_off(local
, "working");
188 return ieee80211_idle_off(local
, "scanning");
190 return ieee80211_idle_on(local
);
192 return ieee80211_idle_off(local
, "in use");
197 void ieee80211_recalc_idle(struct ieee80211_local
*local
)
201 mutex_lock(&local
->iflist_mtx
);
202 chg
= __ieee80211_recalc_idle(local
);
203 mutex_unlock(&local
->iflist_mtx
);
205 ieee80211_hw_config(local
, chg
);
208 static int ieee80211_change_mtu(struct net_device
*dev
, int new_mtu
)
211 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
213 meshhdrlen
= (sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
) ? 5 : 0;
215 /* FIX: what would be proper limits for MTU?
216 * This interface uses 802.3 frames. */
218 new_mtu
> IEEE80211_MAX_DATA_LEN
- 24 - 6 - meshhdrlen
) {
226 static int ieee80211_verify_mac(struct ieee80211_local
*local
, u8
*addr
)
228 struct ieee80211_sub_if_data
*sdata
;
233 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
))
237 new = ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
238 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
239 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
241 m
= local
->hw
.wiphy
->addr_mask
;
242 mask
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
243 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
244 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
247 mutex_lock(&local
->iflist_mtx
);
248 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
249 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
)
253 tmp
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
254 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
255 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
257 if ((new & ~mask
) != (tmp
& ~mask
)) {
262 mutex_unlock(&local
->iflist_mtx
);
267 static int ieee80211_change_mac(struct net_device
*dev
, void *addr
)
269 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
270 struct sockaddr
*sa
= addr
;
273 if (ieee80211_sdata_running(sdata
))
276 ret
= ieee80211_verify_mac(sdata
->local
, sa
->sa_data
);
280 ret
= eth_mac_addr(dev
, sa
);
283 memcpy(sdata
->vif
.addr
, sa
->sa_data
, ETH_ALEN
);
288 static inline int identical_mac_addr_allowed(int type1
, int type2
)
290 return type1
== NL80211_IFTYPE_MONITOR
||
291 type2
== NL80211_IFTYPE_MONITOR
||
292 type1
== NL80211_IFTYPE_P2P_DEVICE
||
293 type2
== NL80211_IFTYPE_P2P_DEVICE
||
294 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_WDS
) ||
295 (type1
== NL80211_IFTYPE_WDS
&&
296 (type2
== NL80211_IFTYPE_WDS
||
297 type2
== NL80211_IFTYPE_AP
)) ||
298 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_AP_VLAN
) ||
299 (type1
== NL80211_IFTYPE_AP_VLAN
&&
300 (type2
== NL80211_IFTYPE_AP
||
301 type2
== NL80211_IFTYPE_AP_VLAN
));
304 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data
*sdata
,
305 enum nl80211_iftype iftype
)
307 struct ieee80211_local
*local
= sdata
->local
;
308 struct ieee80211_sub_if_data
*nsdata
;
312 /* we hold the RTNL here so can safely walk the list */
313 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
314 if (nsdata
!= sdata
&& ieee80211_sdata_running(nsdata
)) {
316 * Allow only a single IBSS interface to be up at any
317 * time. This is restricted because beacon distribution
318 * cannot work properly if both are in the same IBSS.
320 * To remove this restriction we'd have to disallow them
321 * from setting the same SSID on different IBSS interfaces
322 * belonging to the same hardware. Then, however, we're
323 * faced with having to adopt two different TSF timers...
325 if (iftype
== NL80211_IFTYPE_ADHOC
&&
326 nsdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
330 * The remaining checks are only performed for interfaces
331 * with the same MAC address.
333 if (!ether_addr_equal(sdata
->vif
.addr
,
338 * check whether it may have the same address
340 if (!identical_mac_addr_allowed(iftype
,
345 * can only add VLANs to enabled APs
347 if (iftype
== NL80211_IFTYPE_AP_VLAN
&&
348 nsdata
->vif
.type
== NL80211_IFTYPE_AP
)
349 sdata
->bss
= &nsdata
->u
.ap
;
356 static int ieee80211_check_queues(struct ieee80211_sub_if_data
*sdata
)
358 int n_queues
= sdata
->local
->hw
.queues
;
361 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
) {
362 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
363 if (WARN_ON_ONCE(sdata
->vif
.hw_queue
[i
] ==
364 IEEE80211_INVAL_HW_QUEUE
))
366 if (WARN_ON_ONCE(sdata
->vif
.hw_queue
[i
] >=
372 if ((sdata
->vif
.type
!= NL80211_IFTYPE_AP
) ||
373 !(sdata
->local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)) {
374 sdata
->vif
.cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
378 if (WARN_ON_ONCE(sdata
->vif
.cab_queue
== IEEE80211_INVAL_HW_QUEUE
))
381 if (WARN_ON_ONCE(sdata
->vif
.cab_queue
>= n_queues
))
387 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data
*sdata
,
390 struct ieee80211_local
*local
= sdata
->local
;
391 u32 flags
= sdata
->u
.mntr_flags
;
393 #define ADJUST(_f, _s) do { \
394 if (flags & MONITOR_FLAG_##_f) \
395 local->fif_##_s += offset; \
398 ADJUST(FCSFAIL
, fcsfail
);
399 ADJUST(PLCPFAIL
, plcpfail
);
400 ADJUST(CONTROL
, control
);
401 ADJUST(CONTROL
, pspoll
);
402 ADJUST(OTHER_BSS
, other_bss
);
407 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data
*sdata
)
409 struct ieee80211_local
*local
= sdata
->local
;
412 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
413 if (local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)
414 sdata
->vif
.hw_queue
[i
] = IEEE80211_INVAL_HW_QUEUE
;
415 else if (local
->hw
.queues
>= IEEE80211_NUM_ACS
)
416 sdata
->vif
.hw_queue
[i
] = i
;
418 sdata
->vif
.hw_queue
[i
] = 0;
420 sdata
->vif
.cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
423 static int ieee80211_add_virtual_monitor(struct ieee80211_local
*local
)
425 struct ieee80211_sub_if_data
*sdata
;
428 if (!(local
->hw
.flags
& IEEE80211_HW_WANT_MONITOR_VIF
))
431 mutex_lock(&local
->iflist_mtx
);
433 if (local
->monitor_sdata
)
436 sdata
= kzalloc(sizeof(*sdata
) + local
->hw
.vif_data_size
, GFP_KERNEL
);
443 sdata
->local
= local
;
444 sdata
->vif
.type
= NL80211_IFTYPE_MONITOR
;
445 snprintf(sdata
->name
, IFNAMSIZ
, "%s-monitor",
446 wiphy_name(local
->hw
.wiphy
));
448 ieee80211_set_default_queues(sdata
);
450 ret
= drv_add_interface(local
, sdata
);
452 /* ok .. stupid driver, it asked for this! */
457 ret
= ieee80211_check_queues(sdata
);
463 ret
= ieee80211_vif_use_channel(sdata
, &local
->monitor_chandef
,
464 IEEE80211_CHANCTX_EXCLUSIVE
);
466 drv_remove_interface(local
, sdata
);
471 rcu_assign_pointer(local
->monitor_sdata
, sdata
);
473 mutex_unlock(&local
->iflist_mtx
);
477 static void ieee80211_del_virtual_monitor(struct ieee80211_local
*local
)
479 struct ieee80211_sub_if_data
*sdata
;
481 if (!(local
->hw
.flags
& IEEE80211_HW_WANT_MONITOR_VIF
))
484 mutex_lock(&local
->iflist_mtx
);
486 sdata
= rcu_dereference_protected(local
->monitor_sdata
,
487 lockdep_is_held(&local
->iflist_mtx
));
491 rcu_assign_pointer(local
->monitor_sdata
, NULL
);
494 ieee80211_vif_release_channel(sdata
);
496 drv_remove_interface(local
, sdata
);
500 mutex_unlock(&local
->iflist_mtx
);
504 * NOTE: Be very careful when changing this function, it must NOT return
505 * an error on interface type changes that have been pre-checked, so most
506 * checks should be in ieee80211_check_concurrent_iface.
508 int ieee80211_do_open(struct wireless_dev
*wdev
, bool coming_up
)
510 struct ieee80211_sub_if_data
*sdata
= IEEE80211_WDEV_TO_SUB_IF(wdev
);
511 struct net_device
*dev
= wdev
->netdev
;
512 struct ieee80211_local
*local
= sdata
->local
;
513 struct sta_info
*sta
;
516 u32 hw_reconf_flags
= 0;
518 switch (sdata
->vif
.type
) {
519 case NL80211_IFTYPE_WDS
:
520 if (!is_valid_ether_addr(sdata
->u
.wds
.remote_addr
))
523 case NL80211_IFTYPE_AP_VLAN
: {
524 struct ieee80211_sub_if_data
*master
;
529 list_add(&sdata
->u
.vlan
.list
, &sdata
->bss
->vlans
);
531 master
= container_of(sdata
->bss
,
532 struct ieee80211_sub_if_data
, u
.ap
);
533 sdata
->control_port_protocol
=
534 master
->control_port_protocol
;
535 sdata
->control_port_no_encrypt
=
536 master
->control_port_no_encrypt
;
539 case NL80211_IFTYPE_AP
:
540 sdata
->bss
= &sdata
->u
.ap
;
542 case NL80211_IFTYPE_MESH_POINT
:
543 case NL80211_IFTYPE_STATION
:
544 case NL80211_IFTYPE_MONITOR
:
545 case NL80211_IFTYPE_ADHOC
:
546 case NL80211_IFTYPE_P2P_DEVICE
:
547 /* no special treatment */
549 case NL80211_IFTYPE_UNSPECIFIED
:
550 case NUM_NL80211_IFTYPES
:
551 case NL80211_IFTYPE_P2P_CLIENT
:
552 case NL80211_IFTYPE_P2P_GO
:
558 if (local
->open_count
== 0) {
559 res
= drv_start(local
);
562 if (local
->ops
->napi_poll
)
563 napi_enable(&local
->napi
);
564 /* we're brought up, everything changes */
565 hw_reconf_flags
= ~0;
566 ieee80211_led_radio(local
, true);
567 ieee80211_mod_tpt_led_trig(local
,
568 IEEE80211_TPT_LEDTRIG_FL_RADIO
, 0);
572 * Copy the hopefully now-present MAC address to
573 * this interface, if it has the special null one.
575 if (dev
&& is_zero_ether_addr(dev
->dev_addr
)) {
576 memcpy(dev
->dev_addr
,
577 local
->hw
.wiphy
->perm_addr
,
579 memcpy(dev
->perm_addr
, dev
->dev_addr
, ETH_ALEN
);
581 if (!is_valid_ether_addr(dev
->dev_addr
)) {
582 res
= -EADDRNOTAVAIL
;
587 switch (sdata
->vif
.type
) {
588 case NL80211_IFTYPE_AP_VLAN
:
589 /* no need to tell driver, but set carrier */
590 if (rtnl_dereference(sdata
->bss
->beacon
))
591 netif_carrier_on(dev
);
593 netif_carrier_off(dev
);
595 case NL80211_IFTYPE_MONITOR
:
596 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
597 local
->cooked_mntrs
++;
601 if (local
->monitors
== 0 && local
->open_count
== 0) {
602 res
= ieee80211_add_virtual_monitor(local
);
607 /* must be before the call to ieee80211_configure_filter */
609 if (local
->monitors
== 1) {
610 local
->hw
.conf
.flags
|= IEEE80211_CONF_MONITOR
;
611 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
614 ieee80211_adjust_monitor_flags(sdata
, 1);
615 ieee80211_configure_filter(local
);
617 netif_carrier_on(dev
);
621 ieee80211_del_virtual_monitor(local
);
623 res
= drv_add_interface(local
, sdata
);
626 res
= ieee80211_check_queues(sdata
);
628 goto err_del_interface
;
631 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
633 local
->fif_probe_req
++;
635 ieee80211_configure_filter(local
);
636 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
637 local
->fif_probe_req
++;
640 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
)
641 changed
|= ieee80211_reset_erp_info(sdata
);
642 ieee80211_bss_info_change_notify(sdata
, changed
);
644 switch (sdata
->vif
.type
) {
645 case NL80211_IFTYPE_STATION
:
646 case NL80211_IFTYPE_ADHOC
:
647 case NL80211_IFTYPE_AP
:
648 case NL80211_IFTYPE_MESH_POINT
:
649 netif_carrier_off(dev
);
651 case NL80211_IFTYPE_WDS
:
652 case NL80211_IFTYPE_P2P_DEVICE
:
655 netif_carrier_on(dev
);
659 * set default queue parameters so drivers don't
660 * need to initialise the hardware if the hardware
661 * doesn't start up with sane defaults
663 ieee80211_set_wmm_default(sdata
, true);
666 set_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
668 if (sdata
->vif
.type
== NL80211_IFTYPE_WDS
) {
669 /* Create STA entry for the WDS peer */
670 sta
= sta_info_alloc(sdata
, sdata
->u
.wds
.remote_addr
,
674 goto err_del_interface
;
677 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTH
);
678 sta_info_pre_move_state(sta
, IEEE80211_STA_ASSOC
);
679 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
681 res
= sta_info_insert(sta
);
683 /* STA has been freed */
684 goto err_del_interface
;
687 rate_control_rate_init(sta
);
688 netif_carrier_on(dev
);
689 } else if (sdata
->vif
.type
== NL80211_IFTYPE_P2P_DEVICE
) {
690 rcu_assign_pointer(local
->p2p_sdata
, sdata
);
694 * set_multicast_list will be invoked by the networking core
695 * which will check whether any increments here were done in
696 * error and sync them down to the hardware as filter flags.
698 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
699 atomic_inc(&local
->iff_allmultis
);
701 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
702 atomic_inc(&local
->iff_promiscs
);
704 mutex_lock(&local
->mtx
);
705 hw_reconf_flags
|= __ieee80211_recalc_idle(local
);
706 mutex_unlock(&local
->mtx
);
712 ieee80211_hw_config(local
, hw_reconf_flags
);
714 ieee80211_recalc_ps(local
, -1);
717 netif_tx_start_all_queues(dev
);
721 drv_remove_interface(local
, sdata
);
723 if (!local
->open_count
)
727 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
728 list_del(&sdata
->u
.vlan
.list
);
729 /* might already be clear but that doesn't matter */
730 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
734 static int ieee80211_open(struct net_device
*dev
)
736 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
739 /* fail early if user set an invalid address */
740 if (!is_valid_ether_addr(dev
->dev_addr
))
741 return -EADDRNOTAVAIL
;
743 err
= ieee80211_check_concurrent_iface(sdata
, sdata
->vif
.type
);
747 return ieee80211_do_open(&sdata
->wdev
, true);
750 static void ieee80211_do_stop(struct ieee80211_sub_if_data
*sdata
,
753 struct ieee80211_local
*local
= sdata
->local
;
755 struct sk_buff
*skb
, *tmp
;
756 u32 hw_reconf_flags
= 0;
759 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
761 if (rcu_access_pointer(local
->scan_sdata
) == sdata
)
762 ieee80211_scan_cancel(local
);
765 * Stop TX on this interface first.
768 netif_tx_stop_all_queues(sdata
->dev
);
770 ieee80211_roc_purge(sdata
);
773 * Remove all stations associated with this interface.
775 * This must be done before calling ops->remove_interface()
776 * because otherwise we can later invoke ops->sta_notify()
777 * whenever the STAs are removed, and that invalidates driver
778 * assumptions about always getting a vif pointer that is valid
779 * (because if we remove a STA after ops->remove_interface()
780 * the driver will have removed the vif info already!)
782 * This is relevant only in AP, WDS and mesh modes, since in
783 * all other modes we've already removed all stations when
786 sta_info_flush(local
, sdata
);
789 * Don't count this interface for promisc/allmulti while it
790 * is down. dev_mc_unsync() will invoke set_multicast_list
791 * on the master interface which will sync these down to the
792 * hardware as filter flags.
794 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
795 atomic_dec(&local
->iff_allmultis
);
797 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
798 atomic_dec(&local
->iff_promiscs
);
800 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
802 local
->fif_probe_req
--;
803 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
804 local
->fif_probe_req
--;
808 netif_addr_lock_bh(sdata
->dev
);
809 spin_lock_bh(&local
->filter_lock
);
810 __hw_addr_unsync(&local
->mc_list
, &sdata
->dev
->mc
,
811 sdata
->dev
->addr_len
);
812 spin_unlock_bh(&local
->filter_lock
);
813 netif_addr_unlock_bh(sdata
->dev
);
815 ieee80211_configure_filter(local
);
818 del_timer_sync(&local
->dynamic_ps_timer
);
819 cancel_work_sync(&local
->dynamic_ps_enable_work
);
821 cancel_work_sync(&sdata
->recalc_smps
);
823 /* APs need special treatment */
824 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
825 struct ieee80211_sub_if_data
*vlan
, *tmpsdata
;
827 /* down all dependent devices, that is VLANs */
828 list_for_each_entry_safe(vlan
, tmpsdata
, &sdata
->u
.ap
.vlans
,
830 dev_close(vlan
->dev
);
831 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
832 } else if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
) {
833 ieee80211_mgd_stop(sdata
);
839 switch (sdata
->vif
.type
) {
840 case NL80211_IFTYPE_AP_VLAN
:
841 list_del(&sdata
->u
.vlan
.list
);
842 /* no need to tell driver */
844 case NL80211_IFTYPE_MONITOR
:
845 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
846 local
->cooked_mntrs
--;
851 if (local
->monitors
== 0) {
852 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_MONITOR
;
853 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
854 ieee80211_del_virtual_monitor(local
);
857 ieee80211_adjust_monitor_flags(sdata
, -1);
858 ieee80211_configure_filter(local
);
860 case NL80211_IFTYPE_P2P_DEVICE
:
861 /* relies on synchronize_rcu() below */
862 rcu_assign_pointer(local
->p2p_sdata
, NULL
);
865 flush_work(&sdata
->work
);
867 * When we get here, the interface is marked down.
868 * Call rcu_barrier() to wait both for the RX path
869 * should it be using the interface and enqueuing
870 * frames at this very time on another CPU, and
871 * for the sta free call_rcu callbacks.
876 * free_sta_rcu() enqueues a work for the actual
877 * sta cleanup, so we need to flush it while
878 * sdata is still valid.
880 flush_workqueue(local
->workqueue
);
882 skb_queue_purge(&sdata
->skb_queue
);
885 * Free all remaining keys, there shouldn't be any,
886 * except maybe group keys in AP more or WDS?
888 ieee80211_free_keys(sdata
);
891 drv_remove_interface(local
, sdata
);
896 mutex_lock(&local
->mtx
);
897 hw_reconf_flags
|= __ieee80211_recalc_idle(local
);
898 mutex_unlock(&local
->mtx
);
900 ieee80211_recalc_ps(local
, -1);
902 if (local
->open_count
== 0) {
903 if (local
->ops
->napi_poll
)
904 napi_disable(&local
->napi
);
905 ieee80211_clear_tx_pending(local
);
906 ieee80211_stop_device(local
);
908 /* no reconfiguring after stop! */
912 /* do after stop to avoid reconfiguring when we stop anyway */
914 ieee80211_hw_config(local
, hw_reconf_flags
);
916 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
917 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
918 skb_queue_walk_safe(&local
->pending
[i
], skb
, tmp
) {
919 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
920 if (info
->control
.vif
== &sdata
->vif
) {
921 __skb_unlink(skb
, &local
->pending
[i
]);
922 ieee80211_free_txskb(&local
->hw
, skb
);
926 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
928 if (local
->monitors
== local
->open_count
&& local
->monitors
> 0)
929 ieee80211_add_virtual_monitor(local
);
932 static int ieee80211_stop(struct net_device
*dev
)
934 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
936 ieee80211_do_stop(sdata
, true);
941 static void ieee80211_set_multicast_list(struct net_device
*dev
)
943 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
944 struct ieee80211_local
*local
= sdata
->local
;
945 int allmulti
, promisc
, sdata_allmulti
, sdata_promisc
;
947 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
948 promisc
= !!(dev
->flags
& IFF_PROMISC
);
949 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
950 sdata_promisc
= !!(sdata
->flags
& IEEE80211_SDATA_PROMISC
);
952 if (allmulti
!= sdata_allmulti
) {
953 if (dev
->flags
& IFF_ALLMULTI
)
954 atomic_inc(&local
->iff_allmultis
);
956 atomic_dec(&local
->iff_allmultis
);
957 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
960 if (promisc
!= sdata_promisc
) {
961 if (dev
->flags
& IFF_PROMISC
)
962 atomic_inc(&local
->iff_promiscs
);
964 atomic_dec(&local
->iff_promiscs
);
965 sdata
->flags
^= IEEE80211_SDATA_PROMISC
;
967 spin_lock_bh(&local
->filter_lock
);
968 __hw_addr_sync(&local
->mc_list
, &dev
->mc
, dev
->addr_len
);
969 spin_unlock_bh(&local
->filter_lock
);
970 ieee80211_queue_work(&local
->hw
, &local
->reconfig_filter
);
974 * Called when the netdev is removed or, by the code below, before
975 * the interface type changes.
977 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data
*sdata
)
979 struct ieee80211_local
*local
= sdata
->local
;
983 /* free extra data */
984 ieee80211_free_keys(sdata
);
986 ieee80211_debugfs_remove_netdev(sdata
);
988 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
989 __skb_queue_purge(&sdata
->fragments
[i
].skb_list
);
990 sdata
->fragment_next
= 0;
992 if (ieee80211_vif_is_mesh(&sdata
->vif
))
993 mesh_rmc_free(sdata
);
995 flushed
= sta_info_flush(local
, sdata
);
999 static void ieee80211_uninit(struct net_device
*dev
)
1001 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev
));
1004 static u16
ieee80211_netdev_select_queue(struct net_device
*dev
,
1005 struct sk_buff
*skb
)
1007 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev
), skb
);
1010 static const struct net_device_ops ieee80211_dataif_ops
= {
1011 .ndo_open
= ieee80211_open
,
1012 .ndo_stop
= ieee80211_stop
,
1013 .ndo_uninit
= ieee80211_uninit
,
1014 .ndo_start_xmit
= ieee80211_subif_start_xmit
,
1015 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
1016 .ndo_change_mtu
= ieee80211_change_mtu
,
1017 .ndo_set_mac_address
= ieee80211_change_mac
,
1018 .ndo_select_queue
= ieee80211_netdev_select_queue
,
1021 static u16
ieee80211_monitor_select_queue(struct net_device
*dev
,
1022 struct sk_buff
*skb
)
1024 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1025 struct ieee80211_local
*local
= sdata
->local
;
1026 struct ieee80211_hdr
*hdr
;
1027 struct ieee80211_radiotap_header
*rtap
= (void *)skb
->data
;
1029 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1033 skb
->len
< le16_to_cpu(rtap
->it_len
) + 2 /* frame control */)
1034 return 0; /* doesn't matter, frame will be dropped */
1036 hdr
= (void *)((u8
*)skb
->data
+ le16_to_cpu(rtap
->it_len
));
1038 return ieee80211_select_queue_80211(sdata
, skb
, hdr
);
1041 static const struct net_device_ops ieee80211_monitorif_ops
= {
1042 .ndo_open
= ieee80211_open
,
1043 .ndo_stop
= ieee80211_stop
,
1044 .ndo_uninit
= ieee80211_uninit
,
1045 .ndo_start_xmit
= ieee80211_monitor_start_xmit
,
1046 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
1047 .ndo_change_mtu
= ieee80211_change_mtu
,
1048 .ndo_set_mac_address
= eth_mac_addr
,
1049 .ndo_select_queue
= ieee80211_monitor_select_queue
,
1052 static void ieee80211_if_setup(struct net_device
*dev
)
1055 dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1056 dev
->netdev_ops
= &ieee80211_dataif_ops
;
1057 dev
->destructor
= free_netdev
;
1060 static void ieee80211_iface_work(struct work_struct
*work
)
1062 struct ieee80211_sub_if_data
*sdata
=
1063 container_of(work
, struct ieee80211_sub_if_data
, work
);
1064 struct ieee80211_local
*local
= sdata
->local
;
1065 struct sk_buff
*skb
;
1066 struct sta_info
*sta
;
1067 struct ieee80211_ra_tid
*ra_tid
;
1069 if (!ieee80211_sdata_running(sdata
))
1072 if (local
->scanning
)
1076 * ieee80211_queue_work() should have picked up most cases,
1077 * here we'll pick the rest.
1079 if (WARN(local
->suspended
,
1080 "interface work scheduled while going to suspend\n"))
1083 /* first process frames */
1084 while ((skb
= skb_dequeue(&sdata
->skb_queue
))) {
1085 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
1087 if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_START
) {
1088 ra_tid
= (void *)&skb
->cb
;
1089 ieee80211_start_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
1091 } else if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_STOP
) {
1092 ra_tid
= (void *)&skb
->cb
;
1093 ieee80211_stop_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
1095 } else if (ieee80211_is_action(mgmt
->frame_control
) &&
1096 mgmt
->u
.action
.category
== WLAN_CATEGORY_BACK
) {
1099 mutex_lock(&local
->sta_mtx
);
1100 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
1102 switch (mgmt
->u
.action
.u
.addba_req
.action_code
) {
1103 case WLAN_ACTION_ADDBA_REQ
:
1104 ieee80211_process_addba_request(
1105 local
, sta
, mgmt
, len
);
1107 case WLAN_ACTION_ADDBA_RESP
:
1108 ieee80211_process_addba_resp(local
, sta
,
1111 case WLAN_ACTION_DELBA
:
1112 ieee80211_process_delba(sdata
, sta
,
1120 mutex_unlock(&local
->sta_mtx
);
1121 } else if (ieee80211_is_data_qos(mgmt
->frame_control
)) {
1122 struct ieee80211_hdr
*hdr
= (void *)mgmt
;
1124 * So the frame isn't mgmt, but frame_control
1125 * is at the right place anyway, of course, so
1126 * the if statement is correct.
1128 * Warn if we have other data frame types here,
1129 * they must not get here.
1131 WARN_ON(hdr
->frame_control
&
1132 cpu_to_le16(IEEE80211_STYPE_NULLFUNC
));
1133 WARN_ON(!(hdr
->seq_ctrl
&
1134 cpu_to_le16(IEEE80211_SCTL_FRAG
)));
1136 * This was a fragment of a frame, received while
1137 * a block-ack session was active. That cannot be
1138 * right, so terminate the session.
1140 mutex_lock(&local
->sta_mtx
);
1141 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
1143 u16 tid
= *ieee80211_get_qos_ctl(hdr
) &
1144 IEEE80211_QOS_CTL_TID_MASK
;
1146 __ieee80211_stop_rx_ba_session(
1147 sta
, tid
, WLAN_BACK_RECIPIENT
,
1148 WLAN_REASON_QSTA_REQUIRE_SETUP
,
1151 mutex_unlock(&local
->sta_mtx
);
1152 } else switch (sdata
->vif
.type
) {
1153 case NL80211_IFTYPE_STATION
:
1154 ieee80211_sta_rx_queued_mgmt(sdata
, skb
);
1156 case NL80211_IFTYPE_ADHOC
:
1157 ieee80211_ibss_rx_queued_mgmt(sdata
, skb
);
1159 case NL80211_IFTYPE_MESH_POINT
:
1160 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
1162 ieee80211_mesh_rx_queued_mgmt(sdata
, skb
);
1165 WARN(1, "frame for unexpected interface type");
1172 /* then other type-dependent work */
1173 switch (sdata
->vif
.type
) {
1174 case NL80211_IFTYPE_STATION
:
1175 ieee80211_sta_work(sdata
);
1177 case NL80211_IFTYPE_ADHOC
:
1178 ieee80211_ibss_work(sdata
);
1180 case NL80211_IFTYPE_MESH_POINT
:
1181 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
1183 ieee80211_mesh_work(sdata
);
1190 static void ieee80211_recalc_smps_work(struct work_struct
*work
)
1192 struct ieee80211_sub_if_data
*sdata
=
1193 container_of(work
, struct ieee80211_sub_if_data
, recalc_smps
);
1195 ieee80211_recalc_smps(sdata
);
1199 * Helper function to initialise an interface to a specific type.
1201 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data
*sdata
,
1202 enum nl80211_iftype type
)
1204 /* clear type-dependent union */
1205 memset(&sdata
->u
, 0, sizeof(sdata
->u
));
1207 /* and set some type-dependent values */
1208 sdata
->vif
.type
= type
;
1209 sdata
->vif
.p2p
= false;
1210 sdata
->wdev
.iftype
= type
;
1212 sdata
->control_port_protocol
= cpu_to_be16(ETH_P_PAE
);
1213 sdata
->control_port_no_encrypt
= false;
1215 sdata
->noack_map
= 0;
1217 /* only monitor/p2p-device differ */
1219 sdata
->dev
->netdev_ops
= &ieee80211_dataif_ops
;
1220 sdata
->dev
->type
= ARPHRD_ETHER
;
1223 skb_queue_head_init(&sdata
->skb_queue
);
1224 INIT_WORK(&sdata
->work
, ieee80211_iface_work
);
1225 INIT_WORK(&sdata
->recalc_smps
, ieee80211_recalc_smps_work
);
1228 case NL80211_IFTYPE_P2P_GO
:
1229 type
= NL80211_IFTYPE_AP
;
1230 sdata
->vif
.type
= type
;
1231 sdata
->vif
.p2p
= true;
1233 case NL80211_IFTYPE_AP
:
1234 skb_queue_head_init(&sdata
->u
.ap
.ps
.bc_buf
);
1235 INIT_LIST_HEAD(&sdata
->u
.ap
.vlans
);
1237 case NL80211_IFTYPE_P2P_CLIENT
:
1238 type
= NL80211_IFTYPE_STATION
;
1239 sdata
->vif
.type
= type
;
1240 sdata
->vif
.p2p
= true;
1242 case NL80211_IFTYPE_STATION
:
1243 ieee80211_sta_setup_sdata(sdata
);
1245 case NL80211_IFTYPE_ADHOC
:
1246 ieee80211_ibss_setup_sdata(sdata
);
1248 case NL80211_IFTYPE_MESH_POINT
:
1249 if (ieee80211_vif_is_mesh(&sdata
->vif
))
1250 ieee80211_mesh_init_sdata(sdata
);
1252 case NL80211_IFTYPE_MONITOR
:
1253 sdata
->dev
->type
= ARPHRD_IEEE80211_RADIOTAP
;
1254 sdata
->dev
->netdev_ops
= &ieee80211_monitorif_ops
;
1255 sdata
->u
.mntr_flags
= MONITOR_FLAG_CONTROL
|
1256 MONITOR_FLAG_OTHER_BSS
;
1258 case NL80211_IFTYPE_WDS
:
1259 case NL80211_IFTYPE_AP_VLAN
:
1260 case NL80211_IFTYPE_P2P_DEVICE
:
1262 case NL80211_IFTYPE_UNSPECIFIED
:
1263 case NUM_NL80211_IFTYPES
:
1268 ieee80211_debugfs_add_netdev(sdata
);
1271 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data
*sdata
,
1272 enum nl80211_iftype type
)
1274 struct ieee80211_local
*local
= sdata
->local
;
1276 enum nl80211_iftype internal_type
= type
;
1281 if (!local
->ops
->change_interface
)
1284 switch (sdata
->vif
.type
) {
1285 case NL80211_IFTYPE_AP
:
1286 case NL80211_IFTYPE_STATION
:
1287 case NL80211_IFTYPE_ADHOC
:
1289 * Could maybe also all others here?
1290 * Just not sure how that interacts
1291 * with the RX/config path e.g. for
1300 case NL80211_IFTYPE_AP
:
1301 case NL80211_IFTYPE_STATION
:
1302 case NL80211_IFTYPE_ADHOC
:
1304 * Could probably support everything
1305 * but WDS here (WDS do_open can fail
1306 * under memory pressure, which this
1307 * code isn't prepared to handle).
1310 case NL80211_IFTYPE_P2P_CLIENT
:
1312 internal_type
= NL80211_IFTYPE_STATION
;
1314 case NL80211_IFTYPE_P2P_GO
:
1316 internal_type
= NL80211_IFTYPE_AP
;
1322 ret
= ieee80211_check_concurrent_iface(sdata
, internal_type
);
1326 ieee80211_do_stop(sdata
, false);
1328 ieee80211_teardown_sdata(sdata
);
1330 ret
= drv_change_interface(local
, sdata
, internal_type
, p2p
);
1332 type
= sdata
->vif
.type
;
1335 * Ignore return value here, there's not much we can do since
1336 * the driver changed the interface type internally already.
1337 * The warnings will hopefully make driver authors fix it :-)
1339 ieee80211_check_queues(sdata
);
1341 ieee80211_setup_sdata(sdata
, type
);
1343 err
= ieee80211_do_open(&sdata
->wdev
, false);
1344 WARN(err
, "type change: do_open returned %d", err
);
1349 int ieee80211_if_change_type(struct ieee80211_sub_if_data
*sdata
,
1350 enum nl80211_iftype type
)
1356 if (type
== ieee80211_vif_type_p2p(&sdata
->vif
))
1359 if (ieee80211_sdata_running(sdata
)) {
1360 ret
= ieee80211_runtime_change_iftype(sdata
, type
);
1364 /* Purge and reset type-dependent state. */
1365 ieee80211_teardown_sdata(sdata
);
1366 ieee80211_setup_sdata(sdata
, type
);
1369 /* reset some values that shouldn't be kept across type changes */
1370 sdata
->drop_unencrypted
= 0;
1371 if (type
== NL80211_IFTYPE_STATION
)
1372 sdata
->u
.mgd
.use_4addr
= false;
1377 static void ieee80211_assign_perm_addr(struct ieee80211_local
*local
,
1378 u8
*perm_addr
, enum nl80211_iftype type
)
1380 struct ieee80211_sub_if_data
*sdata
;
1381 u64 mask
, start
, addr
, val
, inc
;
1383 u8 tmp_addr
[ETH_ALEN
];
1386 /* default ... something at least */
1387 memcpy(perm_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
1389 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
) &&
1390 local
->hw
.wiphy
->n_addresses
<= 1)
1393 mutex_lock(&local
->iflist_mtx
);
1396 case NL80211_IFTYPE_MONITOR
:
1397 /* doesn't matter */
1399 case NL80211_IFTYPE_WDS
:
1400 case NL80211_IFTYPE_AP_VLAN
:
1401 /* match up with an AP interface */
1402 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1403 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
1405 memcpy(perm_addr
, sdata
->vif
.addr
, ETH_ALEN
);
1408 /* keep default if no AP interface present */
1410 case NL80211_IFTYPE_P2P_CLIENT
:
1411 case NL80211_IFTYPE_P2P_GO
:
1412 if (local
->hw
.flags
& IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF
) {
1413 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1414 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
)
1416 if (!ieee80211_sdata_running(sdata
))
1418 memcpy(perm_addr
, sdata
->vif
.addr
, ETH_ALEN
);
1422 /* otherwise fall through */
1424 /* assign a new address if possible -- try n_addresses first */
1425 for (i
= 0; i
< local
->hw
.wiphy
->n_addresses
; i
++) {
1428 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1429 if (memcmp(local
->hw
.wiphy
->addresses
[i
].addr
,
1430 sdata
->vif
.addr
, ETH_ALEN
) == 0) {
1438 local
->hw
.wiphy
->addresses
[i
].addr
,
1444 /* try mask if available */
1445 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
))
1448 m
= local
->hw
.wiphy
->addr_mask
;
1449 mask
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1450 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1451 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1453 if (__ffs64(mask
) + hweight64(mask
) != fls64(mask
)) {
1454 /* not a contiguous mask ... not handled now! */
1455 pr_info("not contiguous\n");
1459 m
= local
->hw
.wiphy
->perm_addr
;
1460 start
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1461 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1462 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1464 inc
= 1ULL<<__ffs64(mask
);
1465 val
= (start
& mask
);
1466 addr
= (start
& ~mask
) | (val
& mask
);
1470 tmp_addr
[5] = addr
>> 0*8;
1471 tmp_addr
[4] = addr
>> 1*8;
1472 tmp_addr
[3] = addr
>> 2*8;
1473 tmp_addr
[2] = addr
>> 3*8;
1474 tmp_addr
[1] = addr
>> 4*8;
1475 tmp_addr
[0] = addr
>> 5*8;
1479 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1480 if (memcmp(tmp_addr
, sdata
->vif
.addr
,
1488 memcpy(perm_addr
, tmp_addr
, ETH_ALEN
);
1491 addr
= (start
& ~mask
) | (val
& mask
);
1492 } while (addr
!= start
);
1498 mutex_unlock(&local
->iflist_mtx
);
1501 int ieee80211_if_add(struct ieee80211_local
*local
, const char *name
,
1502 struct wireless_dev
**new_wdev
, enum nl80211_iftype type
,
1503 struct vif_params
*params
)
1505 struct net_device
*ndev
= NULL
;
1506 struct ieee80211_sub_if_data
*sdata
= NULL
;
1512 if (type
== NL80211_IFTYPE_P2P_DEVICE
) {
1513 struct wireless_dev
*wdev
;
1515 sdata
= kzalloc(sizeof(*sdata
) + local
->hw
.vif_data_size
,
1519 wdev
= &sdata
->wdev
;
1522 strlcpy(sdata
->name
, name
, IFNAMSIZ
);
1523 ieee80211_assign_perm_addr(local
, wdev
->address
, type
);
1524 memcpy(sdata
->vif
.addr
, wdev
->address
, ETH_ALEN
);
1526 if (local
->hw
.queues
>= IEEE80211_NUM_ACS
)
1527 txqs
= IEEE80211_NUM_ACS
;
1529 ndev
= alloc_netdev_mqs(sizeof(*sdata
) +
1530 local
->hw
.vif_data_size
,
1531 name
, ieee80211_if_setup
, txqs
, 1);
1534 dev_net_set(ndev
, wiphy_net(local
->hw
.wiphy
));
1536 ndev
->needed_headroom
= local
->tx_headroom
+
1537 4*6 /* four MAC addresses */
1538 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1540 + 8 /* rfc1042/bridge tunnel */
1541 - ETH_HLEN
/* ethernet hard_header_len */
1542 + IEEE80211_ENCRYPT_HEADROOM
;
1543 ndev
->needed_tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
1545 ret
= dev_alloc_name(ndev
, ndev
->name
);
1551 ieee80211_assign_perm_addr(local
, ndev
->perm_addr
, type
);
1552 memcpy(ndev
->dev_addr
, ndev
->perm_addr
, ETH_ALEN
);
1553 SET_NETDEV_DEV(ndev
, wiphy_dev(local
->hw
.wiphy
));
1555 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1556 sdata
= netdev_priv(ndev
);
1557 ndev
->ieee80211_ptr
= &sdata
->wdev
;
1558 memcpy(sdata
->vif
.addr
, ndev
->dev_addr
, ETH_ALEN
);
1559 memcpy(sdata
->name
, ndev
->name
, IFNAMSIZ
);
1564 /* initialise type-independent data */
1565 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
1566 sdata
->local
= local
;
1568 sdata
->arp_filter_state
= true;
1571 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
1572 skb_queue_head_init(&sdata
->fragments
[i
].skb_list
);
1574 INIT_LIST_HEAD(&sdata
->key_list
);
1576 for (i
= 0; i
< IEEE80211_NUM_BANDS
; i
++) {
1577 struct ieee80211_supported_band
*sband
;
1578 sband
= local
->hw
.wiphy
->bands
[i
];
1579 sdata
->rc_rateidx_mask
[i
] =
1580 sband
? (1 << sband
->n_bitrates
) - 1 : 0;
1582 memcpy(sdata
->rc_rateidx_mcs_mask
[i
],
1583 sband
->ht_cap
.mcs
.rx_mask
,
1584 sizeof(sdata
->rc_rateidx_mcs_mask
[i
]));
1586 memset(sdata
->rc_rateidx_mcs_mask
[i
], 0,
1587 sizeof(sdata
->rc_rateidx_mcs_mask
[i
]));
1590 ieee80211_set_default_queues(sdata
);
1592 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
1593 sdata
->user_power_level
= local
->user_power_level
;
1595 /* setup type-dependent data */
1596 ieee80211_setup_sdata(sdata
, type
);
1600 ndev
->ieee80211_ptr
->use_4addr
= params
->use_4addr
;
1601 if (type
== NL80211_IFTYPE_STATION
)
1602 sdata
->u
.mgd
.use_4addr
= params
->use_4addr
;
1605 ndev
->features
|= local
->hw
.netdev_features
;
1607 ret
= register_netdevice(ndev
);
1614 mutex_lock(&local
->iflist_mtx
);
1615 list_add_tail_rcu(&sdata
->list
, &local
->interfaces
);
1616 mutex_unlock(&local
->iflist_mtx
);
1619 *new_wdev
= &sdata
->wdev
;
1624 void ieee80211_if_remove(struct ieee80211_sub_if_data
*sdata
)
1628 mutex_lock(&sdata
->local
->iflist_mtx
);
1629 list_del_rcu(&sdata
->list
);
1630 mutex_unlock(&sdata
->local
->iflist_mtx
);
1635 unregister_netdevice(sdata
->dev
);
1637 cfg80211_unregister_wdev(&sdata
->wdev
);
1642 void ieee80211_sdata_stop(struct ieee80211_sub_if_data
*sdata
)
1644 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING
, &sdata
->state
)))
1646 ieee80211_do_stop(sdata
, true);
1647 ieee80211_teardown_sdata(sdata
);
1651 * Remove all interfaces, may only be called at hardware unregistration
1652 * time because it doesn't do RCU-safe list removals.
1654 void ieee80211_remove_interfaces(struct ieee80211_local
*local
)
1656 struct ieee80211_sub_if_data
*sdata
, *tmp
;
1657 LIST_HEAD(unreg_list
);
1658 LIST_HEAD(wdev_list
);
1662 mutex_lock(&local
->iflist_mtx
);
1663 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
1664 list_del(&sdata
->list
);
1667 unregister_netdevice_queue(sdata
->dev
, &unreg_list
);
1669 list_add(&sdata
->list
, &wdev_list
);
1671 mutex_unlock(&local
->iflist_mtx
);
1672 unregister_netdevice_many(&unreg_list
);
1673 list_del(&unreg_list
);
1675 list_for_each_entry_safe(sdata
, tmp
, &wdev_list
, list
) {
1676 list_del(&sdata
->list
);
1677 cfg80211_unregister_wdev(&sdata
->wdev
);
1682 static int netdev_notify(struct notifier_block
*nb
,
1683 unsigned long state
,
1686 struct net_device
*dev
= ndev
;
1687 struct ieee80211_sub_if_data
*sdata
;
1689 if (state
!= NETDEV_CHANGENAME
)
1692 if (!dev
->ieee80211_ptr
|| !dev
->ieee80211_ptr
->wiphy
)
1695 if (dev
->ieee80211_ptr
->wiphy
->privid
!= mac80211_wiphy_privid
)
1698 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1700 memcpy(sdata
->name
, dev
->name
, IFNAMSIZ
);
1702 ieee80211_debugfs_rename_netdev(sdata
);
1706 static struct notifier_block mac80211_netdev_notifier
= {
1707 .notifier_call
= netdev_notify
,
1710 int ieee80211_iface_init(void)
1712 return register_netdevice_notifier(&mac80211_netdev_notifier
);
1715 void ieee80211_iface_exit(void)
1717 unregister_netdevice_notifier(&mac80211_netdev_notifier
);