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
)
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_local
*local
, u8
*addr
)
164 struct ieee80211_sub_if_data
*sdata
;
169 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
))
173 new = ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
174 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
175 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
177 m
= local
->hw
.wiphy
->addr_mask
;
178 mask
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
179 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
180 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
183 mutex_lock(&local
->iflist_mtx
);
184 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
185 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
)
189 tmp
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
190 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
191 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
193 if ((new & ~mask
) != (tmp
& ~mask
)) {
198 mutex_unlock(&local
->iflist_mtx
);
203 static int ieee80211_change_mac(struct net_device
*dev
, void *addr
)
205 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
206 struct sockaddr
*sa
= addr
;
209 if (ieee80211_sdata_running(sdata
))
212 ret
= ieee80211_verify_mac(sdata
->local
, sa
->sa_data
);
216 ret
= eth_mac_addr(dev
, sa
);
219 memcpy(sdata
->vif
.addr
, sa
->sa_data
, ETH_ALEN
);
224 static inline int identical_mac_addr_allowed(int type1
, int type2
)
226 return type1
== NL80211_IFTYPE_MONITOR
||
227 type2
== NL80211_IFTYPE_MONITOR
||
228 type1
== NL80211_IFTYPE_P2P_DEVICE
||
229 type2
== NL80211_IFTYPE_P2P_DEVICE
||
230 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_WDS
) ||
231 (type1
== NL80211_IFTYPE_WDS
&&
232 (type2
== NL80211_IFTYPE_WDS
||
233 type2
== NL80211_IFTYPE_AP
)) ||
234 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_AP_VLAN
) ||
235 (type1
== NL80211_IFTYPE_AP_VLAN
&&
236 (type2
== NL80211_IFTYPE_AP
||
237 type2
== NL80211_IFTYPE_AP_VLAN
));
240 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data
*sdata
,
241 enum nl80211_iftype iftype
)
243 struct ieee80211_local
*local
= sdata
->local
;
244 struct ieee80211_sub_if_data
*nsdata
;
248 /* we hold the RTNL here so can safely walk the list */
249 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
250 if (nsdata
!= sdata
&& ieee80211_sdata_running(nsdata
)) {
252 * Allow only a single IBSS interface to be up at any
253 * time. This is restricted because beacon distribution
254 * cannot work properly if both are in the same IBSS.
256 * To remove this restriction we'd have to disallow them
257 * from setting the same SSID on different IBSS interfaces
258 * belonging to the same hardware. Then, however, we're
259 * faced with having to adopt two different TSF timers...
261 if (iftype
== NL80211_IFTYPE_ADHOC
&&
262 nsdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
266 * The remaining checks are only performed for interfaces
267 * with the same MAC address.
269 if (!ether_addr_equal(sdata
->vif
.addr
,
274 * check whether it may have the same address
276 if (!identical_mac_addr_allowed(iftype
,
281 * can only add VLANs to enabled APs
283 if (iftype
== NL80211_IFTYPE_AP_VLAN
&&
284 nsdata
->vif
.type
== NL80211_IFTYPE_AP
)
285 sdata
->bss
= &nsdata
->u
.ap
;
292 static int ieee80211_check_queues(struct ieee80211_sub_if_data
*sdata
)
294 int n_queues
= sdata
->local
->hw
.queues
;
297 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
) {
298 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
299 if (WARN_ON_ONCE(sdata
->vif
.hw_queue
[i
] ==
300 IEEE80211_INVAL_HW_QUEUE
))
302 if (WARN_ON_ONCE(sdata
->vif
.hw_queue
[i
] >=
308 if ((sdata
->vif
.type
!= NL80211_IFTYPE_AP
&&
309 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
) ||
310 !(sdata
->local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)) {
311 sdata
->vif
.cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
315 if (WARN_ON_ONCE(sdata
->vif
.cab_queue
== IEEE80211_INVAL_HW_QUEUE
))
318 if (WARN_ON_ONCE(sdata
->vif
.cab_queue
>= n_queues
))
324 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data
*sdata
,
327 struct ieee80211_local
*local
= sdata
->local
;
328 u32 flags
= sdata
->u
.mntr_flags
;
330 #define ADJUST(_f, _s) do { \
331 if (flags & MONITOR_FLAG_##_f) \
332 local->fif_##_s += offset; \
335 ADJUST(FCSFAIL
, fcsfail
);
336 ADJUST(PLCPFAIL
, plcpfail
);
337 ADJUST(CONTROL
, control
);
338 ADJUST(CONTROL
, pspoll
);
339 ADJUST(OTHER_BSS
, other_bss
);
344 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data
*sdata
)
346 struct ieee80211_local
*local
= sdata
->local
;
349 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
350 if (local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)
351 sdata
->vif
.hw_queue
[i
] = IEEE80211_INVAL_HW_QUEUE
;
352 else if (local
->hw
.queues
>= IEEE80211_NUM_ACS
)
353 sdata
->vif
.hw_queue
[i
] = i
;
355 sdata
->vif
.hw_queue
[i
] = 0;
357 sdata
->vif
.cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
360 int ieee80211_add_virtual_monitor(struct ieee80211_local
*local
)
362 struct ieee80211_sub_if_data
*sdata
;
365 if (!(local
->hw
.flags
& IEEE80211_HW_WANT_MONITOR_VIF
))
370 if (local
->monitor_sdata
)
373 sdata
= kzalloc(sizeof(*sdata
) + local
->hw
.vif_data_size
, GFP_KERNEL
);
378 sdata
->local
= local
;
379 sdata
->vif
.type
= NL80211_IFTYPE_MONITOR
;
380 snprintf(sdata
->name
, IFNAMSIZ
, "%s-monitor",
381 wiphy_name(local
->hw
.wiphy
));
383 ieee80211_set_default_queues(sdata
);
385 ret
= drv_add_interface(local
, sdata
);
387 /* ok .. stupid driver, it asked for this! */
392 ret
= ieee80211_check_queues(sdata
);
398 ret
= ieee80211_vif_use_channel(sdata
, &local
->monitor_chandef
,
399 IEEE80211_CHANCTX_EXCLUSIVE
);
401 drv_remove_interface(local
, sdata
);
406 mutex_lock(&local
->iflist_mtx
);
407 rcu_assign_pointer(local
->monitor_sdata
, sdata
);
408 mutex_unlock(&local
->iflist_mtx
);
413 void ieee80211_del_virtual_monitor(struct ieee80211_local
*local
)
415 struct ieee80211_sub_if_data
*sdata
;
417 if (!(local
->hw
.flags
& IEEE80211_HW_WANT_MONITOR_VIF
))
422 mutex_lock(&local
->iflist_mtx
);
424 sdata
= rcu_dereference_protected(local
->monitor_sdata
,
425 lockdep_is_held(&local
->iflist_mtx
));
427 mutex_unlock(&local
->iflist_mtx
);
431 rcu_assign_pointer(local
->monitor_sdata
, NULL
);
432 mutex_unlock(&local
->iflist_mtx
);
436 ieee80211_vif_release_channel(sdata
);
438 drv_remove_interface(local
, sdata
);
444 * NOTE: Be very careful when changing this function, it must NOT return
445 * an error on interface type changes that have been pre-checked, so most
446 * checks should be in ieee80211_check_concurrent_iface.
448 int ieee80211_do_open(struct wireless_dev
*wdev
, bool coming_up
)
450 struct ieee80211_sub_if_data
*sdata
= IEEE80211_WDEV_TO_SUB_IF(wdev
);
451 struct net_device
*dev
= wdev
->netdev
;
452 struct ieee80211_local
*local
= sdata
->local
;
453 struct sta_info
*sta
;
456 u32 hw_reconf_flags
= 0;
458 switch (sdata
->vif
.type
) {
459 case NL80211_IFTYPE_WDS
:
460 if (!is_valid_ether_addr(sdata
->u
.wds
.remote_addr
))
463 case NL80211_IFTYPE_AP_VLAN
: {
464 struct ieee80211_sub_if_data
*master
;
469 list_add(&sdata
->u
.vlan
.list
, &sdata
->bss
->vlans
);
471 master
= container_of(sdata
->bss
,
472 struct ieee80211_sub_if_data
, u
.ap
);
473 sdata
->control_port_protocol
=
474 master
->control_port_protocol
;
475 sdata
->control_port_no_encrypt
=
476 master
->control_port_no_encrypt
;
479 case NL80211_IFTYPE_AP
:
480 sdata
->bss
= &sdata
->u
.ap
;
482 case NL80211_IFTYPE_MESH_POINT
:
483 case NL80211_IFTYPE_STATION
:
484 case NL80211_IFTYPE_MONITOR
:
485 case NL80211_IFTYPE_ADHOC
:
486 case NL80211_IFTYPE_P2P_DEVICE
:
487 /* no special treatment */
489 case NL80211_IFTYPE_UNSPECIFIED
:
490 case NUM_NL80211_IFTYPES
:
491 case NL80211_IFTYPE_P2P_CLIENT
:
492 case NL80211_IFTYPE_P2P_GO
:
498 if (local
->open_count
== 0) {
499 res
= drv_start(local
);
502 /* we're brought up, everything changes */
503 hw_reconf_flags
= ~0;
504 ieee80211_led_radio(local
, true);
505 ieee80211_mod_tpt_led_trig(local
,
506 IEEE80211_TPT_LEDTRIG_FL_RADIO
, 0);
510 * Copy the hopefully now-present MAC address to
511 * this interface, if it has the special null one.
513 if (dev
&& is_zero_ether_addr(dev
->dev_addr
)) {
514 memcpy(dev
->dev_addr
,
515 local
->hw
.wiphy
->perm_addr
,
517 memcpy(dev
->perm_addr
, dev
->dev_addr
, ETH_ALEN
);
519 if (!is_valid_ether_addr(dev
->dev_addr
)) {
520 res
= -EADDRNOTAVAIL
;
525 switch (sdata
->vif
.type
) {
526 case NL80211_IFTYPE_AP_VLAN
:
527 /* no need to tell driver, but set carrier and chanctx */
528 if (rtnl_dereference(sdata
->bss
->beacon
)) {
529 ieee80211_vif_vlan_copy_chanctx(sdata
);
530 netif_carrier_on(dev
);
532 netif_carrier_off(dev
);
535 case NL80211_IFTYPE_MONITOR
:
536 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
537 local
->cooked_mntrs
++;
541 if (local
->monitors
== 0 && local
->open_count
== 0) {
542 res
= ieee80211_add_virtual_monitor(local
);
547 /* must be before the call to ieee80211_configure_filter */
549 if (local
->monitors
== 1) {
550 local
->hw
.conf
.flags
|= IEEE80211_CONF_MONITOR
;
551 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
554 ieee80211_adjust_monitor_flags(sdata
, 1);
555 ieee80211_configure_filter(local
);
556 mutex_lock(&local
->mtx
);
557 ieee80211_recalc_idle(local
);
558 mutex_unlock(&local
->mtx
);
560 netif_carrier_on(dev
);
564 ieee80211_del_virtual_monitor(local
);
566 res
= drv_add_interface(local
, sdata
);
569 res
= ieee80211_check_queues(sdata
);
571 goto err_del_interface
;
574 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
576 local
->fif_probe_req
++;
578 ieee80211_configure_filter(local
);
579 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
580 local
->fif_probe_req
++;
583 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
)
584 changed
|= ieee80211_reset_erp_info(sdata
);
585 ieee80211_bss_info_change_notify(sdata
, changed
);
587 switch (sdata
->vif
.type
) {
588 case NL80211_IFTYPE_STATION
:
589 case NL80211_IFTYPE_ADHOC
:
590 case NL80211_IFTYPE_AP
:
591 case NL80211_IFTYPE_MESH_POINT
:
592 netif_carrier_off(dev
);
594 case NL80211_IFTYPE_WDS
:
595 case NL80211_IFTYPE_P2P_DEVICE
:
603 * set default queue parameters so drivers don't
604 * need to initialise the hardware if the hardware
605 * doesn't start up with sane defaults
607 ieee80211_set_wmm_default(sdata
, true);
610 set_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
612 if (sdata
->vif
.type
== NL80211_IFTYPE_WDS
) {
613 /* Create STA entry for the WDS peer */
614 sta
= sta_info_alloc(sdata
, sdata
->u
.wds
.remote_addr
,
618 goto err_del_interface
;
621 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTH
);
622 sta_info_pre_move_state(sta
, IEEE80211_STA_ASSOC
);
623 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
625 res
= sta_info_insert(sta
);
627 /* STA has been freed */
628 goto err_del_interface
;
631 rate_control_rate_init(sta
);
632 netif_carrier_on(dev
);
633 } else if (sdata
->vif
.type
== NL80211_IFTYPE_P2P_DEVICE
) {
634 rcu_assign_pointer(local
->p2p_sdata
, sdata
);
638 * set_multicast_list will be invoked by the networking core
639 * which will check whether any increments here were done in
640 * error and sync them down to the hardware as filter flags.
642 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
643 atomic_inc(&local
->iff_allmultis
);
645 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
646 atomic_inc(&local
->iff_promiscs
);
652 ieee80211_hw_config(local
, hw_reconf_flags
);
654 ieee80211_recalc_ps(local
, -1);
658 int n_acs
= IEEE80211_NUM_ACS
;
661 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
664 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
665 if (sdata
->vif
.cab_queue
== IEEE80211_INVAL_HW_QUEUE
||
666 (local
->queue_stop_reasons
[sdata
->vif
.cab_queue
] == 0 &&
667 skb_queue_empty(&local
->pending
[sdata
->vif
.cab_queue
]))) {
668 for (ac
= 0; ac
< n_acs
; ac
++) {
669 int ac_queue
= sdata
->vif
.hw_queue
[ac
];
671 if (local
->queue_stop_reasons
[ac_queue
] == 0 &&
672 skb_queue_empty(&local
->pending
[ac_queue
]))
673 netif_start_subqueue(dev
, ac
);
676 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
681 drv_remove_interface(local
, sdata
);
683 if (!local
->open_count
)
687 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
688 list_del(&sdata
->u
.vlan
.list
);
689 /* might already be clear but that doesn't matter */
690 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
694 static int ieee80211_open(struct net_device
*dev
)
696 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
699 /* fail early if user set an invalid address */
700 if (!is_valid_ether_addr(dev
->dev_addr
))
701 return -EADDRNOTAVAIL
;
703 err
= ieee80211_check_concurrent_iface(sdata
, sdata
->vif
.type
);
707 return ieee80211_do_open(&sdata
->wdev
, true);
710 static void ieee80211_do_stop(struct ieee80211_sub_if_data
*sdata
,
713 struct ieee80211_local
*local
= sdata
->local
;
715 struct sk_buff
*skb
, *tmp
;
716 u32 hw_reconf_flags
= 0;
720 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
722 if (rcu_access_pointer(local
->scan_sdata
) == sdata
)
723 ieee80211_scan_cancel(local
);
726 * Stop TX on this interface first.
729 netif_tx_stop_all_queues(sdata
->dev
);
731 ieee80211_roc_purge(local
, sdata
);
733 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
734 ieee80211_mgd_stop(sdata
);
737 * Remove all stations associated with this interface.
739 * This must be done before calling ops->remove_interface()
740 * because otherwise we can later invoke ops->sta_notify()
741 * whenever the STAs are removed, and that invalidates driver
742 * assumptions about always getting a vif pointer that is valid
743 * (because if we remove a STA after ops->remove_interface()
744 * the driver will have removed the vif info already!)
746 * This is relevant only in WDS mode, in all other modes we've
747 * already removed all stations when disconnecting or similar,
750 * We call sta_info_flush_cleanup() later, to combine RCU waits.
752 flushed
= sta_info_flush_defer(sdata
);
753 WARN_ON_ONCE((sdata
->vif
.type
!= NL80211_IFTYPE_WDS
&& flushed
> 0) ||
754 (sdata
->vif
.type
== NL80211_IFTYPE_WDS
&& flushed
!= 1));
756 /* don't count this interface for promisc/allmulti while it is down */
757 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
758 atomic_dec(&local
->iff_allmultis
);
760 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
761 atomic_dec(&local
->iff_promiscs
);
763 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
765 local
->fif_probe_req
--;
766 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
767 local
->fif_probe_req
--;
771 netif_addr_lock_bh(sdata
->dev
);
772 spin_lock_bh(&local
->filter_lock
);
773 __hw_addr_unsync(&local
->mc_list
, &sdata
->dev
->mc
,
774 sdata
->dev
->addr_len
);
775 spin_unlock_bh(&local
->filter_lock
);
776 netif_addr_unlock_bh(sdata
->dev
);
779 del_timer_sync(&local
->dynamic_ps_timer
);
780 cancel_work_sync(&local
->dynamic_ps_enable_work
);
782 cancel_work_sync(&sdata
->recalc_smps
);
784 cancel_delayed_work_sync(&sdata
->dfs_cac_timer_work
);
786 if (sdata
->wdev
.cac_started
) {
787 WARN_ON(local
->suspended
);
788 mutex_lock(&local
->iflist_mtx
);
789 ieee80211_vif_release_channel(sdata
);
790 mutex_unlock(&local
->iflist_mtx
);
791 cfg80211_cac_event(sdata
->dev
, NL80211_RADAR_CAC_ABORTED
,
795 /* APs need special treatment */
796 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
797 struct ieee80211_sub_if_data
*vlan
, *tmpsdata
;
799 /* down all dependent devices, that is VLANs */
800 list_for_each_entry_safe(vlan
, tmpsdata
, &sdata
->u
.ap
.vlans
,
802 dev_close(vlan
->dev
);
803 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
804 } else if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
805 /* remove all packets in parent bc_buf pointing to this dev */
806 ps
= &sdata
->bss
->ps
;
808 spin_lock_irqsave(&ps
->bc_buf
.lock
, flags
);
809 skb_queue_walk_safe(&ps
->bc_buf
, skb
, tmp
) {
810 if (skb
->dev
== sdata
->dev
) {
811 __skb_unlink(skb
, &ps
->bc_buf
);
812 local
->total_ps_buffered
--;
813 ieee80211_free_txskb(&local
->hw
, skb
);
816 spin_unlock_irqrestore(&ps
->bc_buf
.lock
, flags
);
822 switch (sdata
->vif
.type
) {
823 case NL80211_IFTYPE_AP_VLAN
:
824 list_del(&sdata
->u
.vlan
.list
);
825 rcu_assign_pointer(sdata
->vif
.chanctx_conf
, NULL
);
826 /* no need to tell driver */
828 case NL80211_IFTYPE_MONITOR
:
829 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
830 local
->cooked_mntrs
--;
835 if (local
->monitors
== 0) {
836 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_MONITOR
;
837 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
840 ieee80211_adjust_monitor_flags(sdata
, -1);
842 case NL80211_IFTYPE_P2P_DEVICE
:
843 /* relies on synchronize_rcu() below */
844 rcu_assign_pointer(local
->p2p_sdata
, NULL
);
847 cancel_work_sync(&sdata
->work
);
849 * When we get here, the interface is marked down.
851 * sta_info_flush_cleanup() requires rcu_barrier()
852 * first to wait for the station call_rcu() calls
853 * to complete, and we also need synchronize_rcu()
854 * to wait for the RX path in case it is using the
855 * interface and enqueuing frames at this very time on
860 sta_info_flush_cleanup(sdata
);
863 * Free all remaining keys, there shouldn't be any,
864 * except maybe in WDS mode?
866 ieee80211_free_keys(sdata
);
869 case NL80211_IFTYPE_AP
:
870 skb_queue_purge(&sdata
->skb_queue
);
875 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
876 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
877 skb_queue_walk_safe(&local
->pending
[i
], skb
, tmp
) {
878 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
879 if (info
->control
.vif
== &sdata
->vif
) {
880 __skb_unlink(skb
, &local
->pending
[i
]);
881 ieee80211_free_txskb(&local
->hw
, skb
);
885 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
887 if (local
->open_count
== 0)
888 ieee80211_clear_tx_pending(local
);
891 * If the interface goes down while suspended, presumably because
892 * the device was unplugged and that happens before our resume,
893 * then the driver is already unconfigured and the remainder of
894 * this function isn't needed.
895 * XXX: what about WoWLAN? If the device has software state, e.g.
896 * memory allocated, it might expect teardown commands from
899 if (local
->suspended
) {
900 WARN_ON(local
->wowlan
);
901 WARN_ON(rtnl_dereference(local
->monitor_sdata
));
905 switch (sdata
->vif
.type
) {
906 case NL80211_IFTYPE_AP_VLAN
:
908 case NL80211_IFTYPE_MONITOR
:
909 if (local
->monitors
== 0)
910 ieee80211_del_virtual_monitor(local
);
912 mutex_lock(&local
->mtx
);
913 ieee80211_recalc_idle(local
);
914 mutex_unlock(&local
->mtx
);
918 drv_remove_interface(local
, sdata
);
921 ieee80211_recalc_ps(local
, -1);
923 if (local
->open_count
== 0) {
924 ieee80211_stop_device(local
);
926 /* no reconfiguring after stop! */
930 /* do after stop to avoid reconfiguring when we stop anyway */
931 ieee80211_configure_filter(local
);
932 ieee80211_hw_config(local
, hw_reconf_flags
);
934 if (local
->monitors
== local
->open_count
)
935 ieee80211_add_virtual_monitor(local
);
938 static int ieee80211_stop(struct net_device
*dev
)
940 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
942 ieee80211_do_stop(sdata
, true);
947 static void ieee80211_set_multicast_list(struct net_device
*dev
)
949 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
950 struct ieee80211_local
*local
= sdata
->local
;
951 int allmulti
, promisc
, sdata_allmulti
, sdata_promisc
;
953 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
954 promisc
= !!(dev
->flags
& IFF_PROMISC
);
955 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
956 sdata_promisc
= !!(sdata
->flags
& IEEE80211_SDATA_PROMISC
);
958 if (allmulti
!= sdata_allmulti
) {
959 if (dev
->flags
& IFF_ALLMULTI
)
960 atomic_inc(&local
->iff_allmultis
);
962 atomic_dec(&local
->iff_allmultis
);
963 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
966 if (promisc
!= sdata_promisc
) {
967 if (dev
->flags
& IFF_PROMISC
)
968 atomic_inc(&local
->iff_promiscs
);
970 atomic_dec(&local
->iff_promiscs
);
971 sdata
->flags
^= IEEE80211_SDATA_PROMISC
;
975 * TODO: If somebody needs this on AP interfaces,
976 * it can be enabled easily but multicast
977 * addresses from VLANs need to be synced.
979 if (sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
980 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
981 sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
982 drv_set_multicast_list(local
, sdata
, &dev
->mc
);
984 spin_lock_bh(&local
->filter_lock
);
985 __hw_addr_sync(&local
->mc_list
, &dev
->mc
, dev
->addr_len
);
986 spin_unlock_bh(&local
->filter_lock
);
987 ieee80211_queue_work(&local
->hw
, &local
->reconfig_filter
);
991 * Called when the netdev is removed or, by the code below, before
992 * the interface type changes.
994 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data
*sdata
)
999 /* free extra data */
1000 ieee80211_free_keys(sdata
);
1002 ieee80211_debugfs_remove_netdev(sdata
);
1004 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
1005 __skb_queue_purge(&sdata
->fragments
[i
].skb_list
);
1006 sdata
->fragment_next
= 0;
1008 if (ieee80211_vif_is_mesh(&sdata
->vif
))
1009 mesh_rmc_free(sdata
);
1011 flushed
= sta_info_flush(sdata
);
1015 static void ieee80211_uninit(struct net_device
*dev
)
1017 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev
));
1020 static u16
ieee80211_netdev_select_queue(struct net_device
*dev
,
1021 struct sk_buff
*skb
)
1023 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev
), skb
);
1026 static const struct net_device_ops ieee80211_dataif_ops
= {
1027 .ndo_open
= ieee80211_open
,
1028 .ndo_stop
= ieee80211_stop
,
1029 .ndo_uninit
= ieee80211_uninit
,
1030 .ndo_start_xmit
= ieee80211_subif_start_xmit
,
1031 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
1032 .ndo_change_mtu
= ieee80211_change_mtu
,
1033 .ndo_set_mac_address
= ieee80211_change_mac
,
1034 .ndo_select_queue
= ieee80211_netdev_select_queue
,
1037 static u16
ieee80211_monitor_select_queue(struct net_device
*dev
,
1038 struct sk_buff
*skb
)
1040 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1041 struct ieee80211_local
*local
= sdata
->local
;
1042 struct ieee80211_hdr
*hdr
;
1043 struct ieee80211_radiotap_header
*rtap
= (void *)skb
->data
;
1045 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1049 skb
->len
< le16_to_cpu(rtap
->it_len
) + 2 /* frame control */)
1050 return 0; /* doesn't matter, frame will be dropped */
1052 hdr
= (void *)((u8
*)skb
->data
+ le16_to_cpu(rtap
->it_len
));
1054 return ieee80211_select_queue_80211(sdata
, skb
, hdr
);
1057 static const struct net_device_ops ieee80211_monitorif_ops
= {
1058 .ndo_open
= ieee80211_open
,
1059 .ndo_stop
= ieee80211_stop
,
1060 .ndo_uninit
= ieee80211_uninit
,
1061 .ndo_start_xmit
= ieee80211_monitor_start_xmit
,
1062 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
1063 .ndo_change_mtu
= ieee80211_change_mtu
,
1064 .ndo_set_mac_address
= eth_mac_addr
,
1065 .ndo_select_queue
= ieee80211_monitor_select_queue
,
1068 static void ieee80211_if_setup(struct net_device
*dev
)
1071 dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1072 dev
->netdev_ops
= &ieee80211_dataif_ops
;
1073 dev
->destructor
= free_netdev
;
1076 static void ieee80211_iface_work(struct work_struct
*work
)
1078 struct ieee80211_sub_if_data
*sdata
=
1079 container_of(work
, struct ieee80211_sub_if_data
, work
);
1080 struct ieee80211_local
*local
= sdata
->local
;
1081 struct sk_buff
*skb
;
1082 struct sta_info
*sta
;
1083 struct ieee80211_ra_tid
*ra_tid
;
1085 if (!ieee80211_sdata_running(sdata
))
1088 if (local
->scanning
)
1092 * ieee80211_queue_work() should have picked up most cases,
1093 * here we'll pick the rest.
1095 if (WARN(local
->suspended
,
1096 "interface work scheduled while going to suspend\n"))
1099 /* first process frames */
1100 while ((skb
= skb_dequeue(&sdata
->skb_queue
))) {
1101 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
1103 if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_START
) {
1104 ra_tid
= (void *)&skb
->cb
;
1105 ieee80211_start_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
1107 } else if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_STOP
) {
1108 ra_tid
= (void *)&skb
->cb
;
1109 ieee80211_stop_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
1111 } else if (ieee80211_is_action(mgmt
->frame_control
) &&
1112 mgmt
->u
.action
.category
== WLAN_CATEGORY_BACK
) {
1115 mutex_lock(&local
->sta_mtx
);
1116 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
1118 switch (mgmt
->u
.action
.u
.addba_req
.action_code
) {
1119 case WLAN_ACTION_ADDBA_REQ
:
1120 ieee80211_process_addba_request(
1121 local
, sta
, mgmt
, len
);
1123 case WLAN_ACTION_ADDBA_RESP
:
1124 ieee80211_process_addba_resp(local
, sta
,
1127 case WLAN_ACTION_DELBA
:
1128 ieee80211_process_delba(sdata
, sta
,
1136 mutex_unlock(&local
->sta_mtx
);
1137 } else if (ieee80211_is_data_qos(mgmt
->frame_control
)) {
1138 struct ieee80211_hdr
*hdr
= (void *)mgmt
;
1140 * So the frame isn't mgmt, but frame_control
1141 * is at the right place anyway, of course, so
1142 * the if statement is correct.
1144 * Warn if we have other data frame types here,
1145 * they must not get here.
1147 WARN_ON(hdr
->frame_control
&
1148 cpu_to_le16(IEEE80211_STYPE_NULLFUNC
));
1149 WARN_ON(!(hdr
->seq_ctrl
&
1150 cpu_to_le16(IEEE80211_SCTL_FRAG
)));
1152 * This was a fragment of a frame, received while
1153 * a block-ack session was active. That cannot be
1154 * right, so terminate the session.
1156 mutex_lock(&local
->sta_mtx
);
1157 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
1159 u16 tid
= *ieee80211_get_qos_ctl(hdr
) &
1160 IEEE80211_QOS_CTL_TID_MASK
;
1162 __ieee80211_stop_rx_ba_session(
1163 sta
, tid
, WLAN_BACK_RECIPIENT
,
1164 WLAN_REASON_QSTA_REQUIRE_SETUP
,
1167 mutex_unlock(&local
->sta_mtx
);
1168 } else switch (sdata
->vif
.type
) {
1169 case NL80211_IFTYPE_STATION
:
1170 ieee80211_sta_rx_queued_mgmt(sdata
, skb
);
1172 case NL80211_IFTYPE_ADHOC
:
1173 ieee80211_ibss_rx_queued_mgmt(sdata
, skb
);
1175 case NL80211_IFTYPE_MESH_POINT
:
1176 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
1178 ieee80211_mesh_rx_queued_mgmt(sdata
, skb
);
1181 WARN(1, "frame for unexpected interface type");
1188 /* then other type-dependent work */
1189 switch (sdata
->vif
.type
) {
1190 case NL80211_IFTYPE_STATION
:
1191 ieee80211_sta_work(sdata
);
1193 case NL80211_IFTYPE_ADHOC
:
1194 ieee80211_ibss_work(sdata
);
1196 case NL80211_IFTYPE_MESH_POINT
:
1197 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
1199 ieee80211_mesh_work(sdata
);
1206 static void ieee80211_recalc_smps_work(struct work_struct
*work
)
1208 struct ieee80211_sub_if_data
*sdata
=
1209 container_of(work
, struct ieee80211_sub_if_data
, recalc_smps
);
1211 ieee80211_recalc_smps(sdata
);
1215 * Helper function to initialise an interface to a specific type.
1217 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data
*sdata
,
1218 enum nl80211_iftype type
)
1220 /* clear type-dependent union */
1221 memset(&sdata
->u
, 0, sizeof(sdata
->u
));
1223 /* and set some type-dependent values */
1224 sdata
->vif
.type
= type
;
1225 sdata
->vif
.p2p
= false;
1226 sdata
->wdev
.iftype
= type
;
1228 sdata
->control_port_protocol
= cpu_to_be16(ETH_P_PAE
);
1229 sdata
->control_port_no_encrypt
= false;
1231 sdata
->noack_map
= 0;
1233 /* only monitor/p2p-device differ */
1235 sdata
->dev
->netdev_ops
= &ieee80211_dataif_ops
;
1236 sdata
->dev
->type
= ARPHRD_ETHER
;
1239 skb_queue_head_init(&sdata
->skb_queue
);
1240 INIT_WORK(&sdata
->work
, ieee80211_iface_work
);
1241 INIT_WORK(&sdata
->recalc_smps
, ieee80211_recalc_smps_work
);
1244 case NL80211_IFTYPE_P2P_GO
:
1245 type
= NL80211_IFTYPE_AP
;
1246 sdata
->vif
.type
= type
;
1247 sdata
->vif
.p2p
= true;
1249 case NL80211_IFTYPE_AP
:
1250 skb_queue_head_init(&sdata
->u
.ap
.ps
.bc_buf
);
1251 INIT_LIST_HEAD(&sdata
->u
.ap
.vlans
);
1252 sdata
->vif
.bss_conf
.bssid
= sdata
->vif
.addr
;
1254 case NL80211_IFTYPE_P2P_CLIENT
:
1255 type
= NL80211_IFTYPE_STATION
;
1256 sdata
->vif
.type
= type
;
1257 sdata
->vif
.p2p
= true;
1259 case NL80211_IFTYPE_STATION
:
1260 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.mgd
.bssid
;
1261 ieee80211_sta_setup_sdata(sdata
);
1263 case NL80211_IFTYPE_ADHOC
:
1264 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.ibss
.bssid
;
1265 ieee80211_ibss_setup_sdata(sdata
);
1267 case NL80211_IFTYPE_MESH_POINT
:
1268 if (ieee80211_vif_is_mesh(&sdata
->vif
))
1269 ieee80211_mesh_init_sdata(sdata
);
1271 case NL80211_IFTYPE_MONITOR
:
1272 sdata
->dev
->type
= ARPHRD_IEEE80211_RADIOTAP
;
1273 sdata
->dev
->netdev_ops
= &ieee80211_monitorif_ops
;
1274 sdata
->u
.mntr_flags
= MONITOR_FLAG_CONTROL
|
1275 MONITOR_FLAG_OTHER_BSS
;
1277 case NL80211_IFTYPE_WDS
:
1278 sdata
->vif
.bss_conf
.bssid
= NULL
;
1280 case NL80211_IFTYPE_AP_VLAN
:
1282 case NL80211_IFTYPE_P2P_DEVICE
:
1283 sdata
->vif
.bss_conf
.bssid
= sdata
->vif
.addr
;
1285 case NL80211_IFTYPE_UNSPECIFIED
:
1286 case NUM_NL80211_IFTYPES
:
1291 ieee80211_debugfs_add_netdev(sdata
);
1294 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data
*sdata
,
1295 enum nl80211_iftype type
)
1297 struct ieee80211_local
*local
= sdata
->local
;
1299 enum nl80211_iftype internal_type
= type
;
1304 if (!local
->ops
->change_interface
)
1307 switch (sdata
->vif
.type
) {
1308 case NL80211_IFTYPE_AP
:
1309 case NL80211_IFTYPE_STATION
:
1310 case NL80211_IFTYPE_ADHOC
:
1312 * Could maybe also all others here?
1313 * Just not sure how that interacts
1314 * with the RX/config path e.g. for
1323 case NL80211_IFTYPE_AP
:
1324 case NL80211_IFTYPE_STATION
:
1325 case NL80211_IFTYPE_ADHOC
:
1327 * Could probably support everything
1328 * but WDS here (WDS do_open can fail
1329 * under memory pressure, which this
1330 * code isn't prepared to handle).
1333 case NL80211_IFTYPE_P2P_CLIENT
:
1335 internal_type
= NL80211_IFTYPE_STATION
;
1337 case NL80211_IFTYPE_P2P_GO
:
1339 internal_type
= NL80211_IFTYPE_AP
;
1345 ret
= ieee80211_check_concurrent_iface(sdata
, internal_type
);
1349 ieee80211_do_stop(sdata
, false);
1351 ieee80211_teardown_sdata(sdata
);
1353 ret
= drv_change_interface(local
, sdata
, internal_type
, p2p
);
1355 type
= sdata
->vif
.type
;
1358 * Ignore return value here, there's not much we can do since
1359 * the driver changed the interface type internally already.
1360 * The warnings will hopefully make driver authors fix it :-)
1362 ieee80211_check_queues(sdata
);
1364 ieee80211_setup_sdata(sdata
, type
);
1366 err
= ieee80211_do_open(&sdata
->wdev
, false);
1367 WARN(err
, "type change: do_open returned %d", err
);
1372 int ieee80211_if_change_type(struct ieee80211_sub_if_data
*sdata
,
1373 enum nl80211_iftype type
)
1379 if (type
== ieee80211_vif_type_p2p(&sdata
->vif
))
1382 if (ieee80211_sdata_running(sdata
)) {
1383 ret
= ieee80211_runtime_change_iftype(sdata
, type
);
1387 /* Purge and reset type-dependent state. */
1388 ieee80211_teardown_sdata(sdata
);
1389 ieee80211_setup_sdata(sdata
, type
);
1392 /* reset some values that shouldn't be kept across type changes */
1393 sdata
->drop_unencrypted
= 0;
1394 if (type
== NL80211_IFTYPE_STATION
)
1395 sdata
->u
.mgd
.use_4addr
= false;
1400 static void ieee80211_assign_perm_addr(struct ieee80211_local
*local
,
1401 u8
*perm_addr
, enum nl80211_iftype type
)
1403 struct ieee80211_sub_if_data
*sdata
;
1404 u64 mask
, start
, addr
, val
, inc
;
1406 u8 tmp_addr
[ETH_ALEN
];
1409 /* default ... something at least */
1410 memcpy(perm_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
1412 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
) &&
1413 local
->hw
.wiphy
->n_addresses
<= 1)
1416 mutex_lock(&local
->iflist_mtx
);
1419 case NL80211_IFTYPE_MONITOR
:
1420 /* doesn't matter */
1422 case NL80211_IFTYPE_WDS
:
1423 case NL80211_IFTYPE_AP_VLAN
:
1424 /* match up with an AP interface */
1425 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1426 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
1428 memcpy(perm_addr
, sdata
->vif
.addr
, ETH_ALEN
);
1431 /* keep default if no AP interface present */
1433 case NL80211_IFTYPE_P2P_CLIENT
:
1434 case NL80211_IFTYPE_P2P_GO
:
1435 if (local
->hw
.flags
& IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF
) {
1436 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1437 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
)
1439 if (!ieee80211_sdata_running(sdata
))
1441 memcpy(perm_addr
, sdata
->vif
.addr
, ETH_ALEN
);
1445 /* otherwise fall through */
1447 /* assign a new address if possible -- try n_addresses first */
1448 for (i
= 0; i
< local
->hw
.wiphy
->n_addresses
; i
++) {
1451 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1452 if (memcmp(local
->hw
.wiphy
->addresses
[i
].addr
,
1453 sdata
->vif
.addr
, ETH_ALEN
) == 0) {
1461 local
->hw
.wiphy
->addresses
[i
].addr
,
1467 /* try mask if available */
1468 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
))
1471 m
= local
->hw
.wiphy
->addr_mask
;
1472 mask
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1473 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1474 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1476 if (__ffs64(mask
) + hweight64(mask
) != fls64(mask
)) {
1477 /* not a contiguous mask ... not handled now! */
1478 pr_info("not contiguous\n");
1482 m
= local
->hw
.wiphy
->perm_addr
;
1483 start
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1484 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1485 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1487 inc
= 1ULL<<__ffs64(mask
);
1488 val
= (start
& mask
);
1489 addr
= (start
& ~mask
) | (val
& mask
);
1493 tmp_addr
[5] = addr
>> 0*8;
1494 tmp_addr
[4] = addr
>> 1*8;
1495 tmp_addr
[3] = addr
>> 2*8;
1496 tmp_addr
[2] = addr
>> 3*8;
1497 tmp_addr
[1] = addr
>> 4*8;
1498 tmp_addr
[0] = addr
>> 5*8;
1502 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1503 if (memcmp(tmp_addr
, sdata
->vif
.addr
,
1511 memcpy(perm_addr
, tmp_addr
, ETH_ALEN
);
1514 addr
= (start
& ~mask
) | (val
& mask
);
1515 } while (addr
!= start
);
1521 mutex_unlock(&local
->iflist_mtx
);
1524 static void ieee80211_cleanup_sdata_stas_wk(struct work_struct
*wk
)
1526 struct ieee80211_sub_if_data
*sdata
;
1528 sdata
= container_of(wk
, struct ieee80211_sub_if_data
, cleanup_stations_wk
);
1530 ieee80211_cleanup_sdata_stas(sdata
);
1533 int ieee80211_if_add(struct ieee80211_local
*local
, const char *name
,
1534 struct wireless_dev
**new_wdev
, enum nl80211_iftype type
,
1535 struct vif_params
*params
)
1537 struct net_device
*ndev
= NULL
;
1538 struct ieee80211_sub_if_data
*sdata
= NULL
;
1544 if (type
== NL80211_IFTYPE_P2P_DEVICE
) {
1545 struct wireless_dev
*wdev
;
1547 sdata
= kzalloc(sizeof(*sdata
) + local
->hw
.vif_data_size
,
1551 wdev
= &sdata
->wdev
;
1554 strlcpy(sdata
->name
, name
, IFNAMSIZ
);
1555 ieee80211_assign_perm_addr(local
, wdev
->address
, type
);
1556 memcpy(sdata
->vif
.addr
, wdev
->address
, ETH_ALEN
);
1558 if (local
->hw
.queues
>= IEEE80211_NUM_ACS
)
1559 txqs
= IEEE80211_NUM_ACS
;
1561 ndev
= alloc_netdev_mqs(sizeof(*sdata
) +
1562 local
->hw
.vif_data_size
,
1563 name
, ieee80211_if_setup
, txqs
, 1);
1566 dev_net_set(ndev
, wiphy_net(local
->hw
.wiphy
));
1568 ndev
->needed_headroom
= local
->tx_headroom
+
1569 4*6 /* four MAC addresses */
1570 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1572 + 8 /* rfc1042/bridge tunnel */
1573 - ETH_HLEN
/* ethernet hard_header_len */
1574 + IEEE80211_ENCRYPT_HEADROOM
;
1575 ndev
->needed_tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
1577 ret
= dev_alloc_name(ndev
, ndev
->name
);
1583 ieee80211_assign_perm_addr(local
, ndev
->perm_addr
, type
);
1584 memcpy(ndev
->dev_addr
, ndev
->perm_addr
, ETH_ALEN
);
1585 SET_NETDEV_DEV(ndev
, wiphy_dev(local
->hw
.wiphy
));
1587 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1588 sdata
= netdev_priv(ndev
);
1589 ndev
->ieee80211_ptr
= &sdata
->wdev
;
1590 memcpy(sdata
->vif
.addr
, ndev
->dev_addr
, ETH_ALEN
);
1591 memcpy(sdata
->name
, ndev
->name
, IFNAMSIZ
);
1596 /* initialise type-independent data */
1597 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
1598 sdata
->local
= local
;
1600 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
1601 skb_queue_head_init(&sdata
->fragments
[i
].skb_list
);
1603 INIT_LIST_HEAD(&sdata
->key_list
);
1605 spin_lock_init(&sdata
->cleanup_stations_lock
);
1606 INIT_LIST_HEAD(&sdata
->cleanup_stations
);
1607 INIT_WORK(&sdata
->cleanup_stations_wk
, ieee80211_cleanup_sdata_stas_wk
);
1608 INIT_DELAYED_WORK(&sdata
->dfs_cac_timer_work
,
1609 ieee80211_dfs_cac_timer_work
);
1610 INIT_DELAYED_WORK(&sdata
->dec_tailroom_needed_wk
,
1611 ieee80211_delayed_tailroom_dec
);
1613 for (i
= 0; i
< IEEE80211_NUM_BANDS
; i
++) {
1614 struct ieee80211_supported_band
*sband
;
1615 sband
= local
->hw
.wiphy
->bands
[i
];
1616 sdata
->rc_rateidx_mask
[i
] =
1617 sband
? (1 << sband
->n_bitrates
) - 1 : 0;
1619 memcpy(sdata
->rc_rateidx_mcs_mask
[i
],
1620 sband
->ht_cap
.mcs
.rx_mask
,
1621 sizeof(sdata
->rc_rateidx_mcs_mask
[i
]));
1623 memset(sdata
->rc_rateidx_mcs_mask
[i
], 0,
1624 sizeof(sdata
->rc_rateidx_mcs_mask
[i
]));
1627 ieee80211_set_default_queues(sdata
);
1629 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
1630 sdata
->user_power_level
= local
->user_power_level
;
1632 /* setup type-dependent data */
1633 ieee80211_setup_sdata(sdata
, type
);
1637 ndev
->ieee80211_ptr
->use_4addr
= params
->use_4addr
;
1638 if (type
== NL80211_IFTYPE_STATION
)
1639 sdata
->u
.mgd
.use_4addr
= params
->use_4addr
;
1642 ndev
->features
|= local
->hw
.netdev_features
;
1644 ret
= register_netdevice(ndev
);
1651 mutex_lock(&local
->iflist_mtx
);
1652 list_add_tail_rcu(&sdata
->list
, &local
->interfaces
);
1653 mutex_unlock(&local
->iflist_mtx
);
1656 *new_wdev
= &sdata
->wdev
;
1661 void ieee80211_if_remove(struct ieee80211_sub_if_data
*sdata
)
1665 mutex_lock(&sdata
->local
->iflist_mtx
);
1666 list_del_rcu(&sdata
->list
);
1667 mutex_unlock(&sdata
->local
->iflist_mtx
);
1672 unregister_netdevice(sdata
->dev
);
1674 cfg80211_unregister_wdev(&sdata
->wdev
);
1679 void ieee80211_sdata_stop(struct ieee80211_sub_if_data
*sdata
)
1681 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING
, &sdata
->state
)))
1683 ieee80211_do_stop(sdata
, true);
1684 ieee80211_teardown_sdata(sdata
);
1688 * Remove all interfaces, may only be called at hardware unregistration
1689 * time because it doesn't do RCU-safe list removals.
1691 void ieee80211_remove_interfaces(struct ieee80211_local
*local
)
1693 struct ieee80211_sub_if_data
*sdata
, *tmp
;
1694 LIST_HEAD(unreg_list
);
1695 LIST_HEAD(wdev_list
);
1699 mutex_lock(&local
->iflist_mtx
);
1700 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
1701 list_del(&sdata
->list
);
1704 unregister_netdevice_queue(sdata
->dev
, &unreg_list
);
1706 list_add(&sdata
->list
, &wdev_list
);
1708 mutex_unlock(&local
->iflist_mtx
);
1709 unregister_netdevice_many(&unreg_list
);
1710 list_del(&unreg_list
);
1712 list_for_each_entry_safe(sdata
, tmp
, &wdev_list
, list
) {
1713 list_del(&sdata
->list
);
1714 cfg80211_unregister_wdev(&sdata
->wdev
);
1719 static int netdev_notify(struct notifier_block
*nb
,
1720 unsigned long state
,
1723 struct net_device
*dev
= ndev
;
1724 struct ieee80211_sub_if_data
*sdata
;
1726 if (state
!= NETDEV_CHANGENAME
)
1729 if (!dev
->ieee80211_ptr
|| !dev
->ieee80211_ptr
->wiphy
)
1732 if (dev
->ieee80211_ptr
->wiphy
->privid
!= mac80211_wiphy_privid
)
1735 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1737 memcpy(sdata
->name
, dev
->name
, IFNAMSIZ
);
1739 ieee80211_debugfs_rename_netdev(sdata
);
1743 static struct notifier_block mac80211_netdev_notifier
= {
1744 .notifier_call
= netdev_notify
,
1747 int ieee80211_iface_init(void)
1749 return register_netdevice_notifier(&mac80211_netdev_notifier
);
1752 void ieee80211_iface_exit(void)
1754 unregister_netdevice_notifier(&mac80211_netdev_notifier
);