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_sub_if_data
*sdata
, u8
*addr
)
164 struct ieee80211_local
*local
= sdata
->local
;
165 struct ieee80211_sub_if_data
*iter
;
170 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
))
174 new = ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
175 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
176 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
178 m
= local
->hw
.wiphy
->addr_mask
;
179 mask
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
180 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
181 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
184 mutex_lock(&local
->iflist_mtx
);
185 list_for_each_entry(iter
, &local
->interfaces
, list
) {
189 if (iter
->vif
.type
== NL80211_IFTYPE_MONITOR
)
193 tmp
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
194 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
195 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
197 if ((new & ~mask
) != (tmp
& ~mask
)) {
202 mutex_unlock(&local
->iflist_mtx
);
207 static int ieee80211_change_mac(struct net_device
*dev
, void *addr
)
209 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
210 struct sockaddr
*sa
= addr
;
213 if (ieee80211_sdata_running(sdata
))
216 ret
= ieee80211_verify_mac(sdata
, sa
->sa_data
);
220 ret
= eth_mac_addr(dev
, sa
);
223 memcpy(sdata
->vif
.addr
, sa
->sa_data
, ETH_ALEN
);
228 static inline int identical_mac_addr_allowed(int type1
, int type2
)
230 return type1
== NL80211_IFTYPE_MONITOR
||
231 type2
== NL80211_IFTYPE_MONITOR
||
232 type1
== NL80211_IFTYPE_P2P_DEVICE
||
233 type2
== NL80211_IFTYPE_P2P_DEVICE
||
234 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_WDS
) ||
235 (type1
== NL80211_IFTYPE_WDS
&&
236 (type2
== NL80211_IFTYPE_WDS
||
237 type2
== NL80211_IFTYPE_AP
)) ||
238 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_AP_VLAN
) ||
239 (type1
== NL80211_IFTYPE_AP_VLAN
&&
240 (type2
== NL80211_IFTYPE_AP
||
241 type2
== NL80211_IFTYPE_AP_VLAN
));
244 static int ieee80211_check_concurrent_iface(struct ieee80211_sub_if_data
*sdata
,
245 enum nl80211_iftype iftype
)
247 struct ieee80211_local
*local
= sdata
->local
;
248 struct ieee80211_sub_if_data
*nsdata
;
252 /* we hold the RTNL here so can safely walk the list */
253 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
254 if (nsdata
!= sdata
&& ieee80211_sdata_running(nsdata
)) {
256 * Allow only a single IBSS interface to be up at any
257 * time. This is restricted because beacon distribution
258 * cannot work properly if both are in the same IBSS.
260 * To remove this restriction we'd have to disallow them
261 * from setting the same SSID on different IBSS interfaces
262 * belonging to the same hardware. Then, however, we're
263 * faced with having to adopt two different TSF timers...
265 if (iftype
== NL80211_IFTYPE_ADHOC
&&
266 nsdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
270 * The remaining checks are only performed for interfaces
271 * with the same MAC address.
273 if (!ether_addr_equal(sdata
->vif
.addr
,
278 * check whether it may have the same address
280 if (!identical_mac_addr_allowed(iftype
,
285 * can only add VLANs to enabled APs
287 if (iftype
== NL80211_IFTYPE_AP_VLAN
&&
288 nsdata
->vif
.type
== NL80211_IFTYPE_AP
)
289 sdata
->bss
= &nsdata
->u
.ap
;
296 static int ieee80211_check_queues(struct ieee80211_sub_if_data
*sdata
)
298 int n_queues
= sdata
->local
->hw
.queues
;
301 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
) {
302 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
303 if (WARN_ON_ONCE(sdata
->vif
.hw_queue
[i
] ==
304 IEEE80211_INVAL_HW_QUEUE
))
306 if (WARN_ON_ONCE(sdata
->vif
.hw_queue
[i
] >=
312 if ((sdata
->vif
.type
!= NL80211_IFTYPE_AP
&&
313 sdata
->vif
.type
!= NL80211_IFTYPE_MESH_POINT
) ||
314 !(sdata
->local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)) {
315 sdata
->vif
.cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
319 if (WARN_ON_ONCE(sdata
->vif
.cab_queue
== IEEE80211_INVAL_HW_QUEUE
))
322 if (WARN_ON_ONCE(sdata
->vif
.cab_queue
>= n_queues
))
328 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data
*sdata
,
331 struct ieee80211_local
*local
= sdata
->local
;
332 u32 flags
= sdata
->u
.mntr_flags
;
334 #define ADJUST(_f, _s) do { \
335 if (flags & MONITOR_FLAG_##_f) \
336 local->fif_##_s += offset; \
339 ADJUST(FCSFAIL
, fcsfail
);
340 ADJUST(PLCPFAIL
, plcpfail
);
341 ADJUST(CONTROL
, control
);
342 ADJUST(CONTROL
, pspoll
);
343 ADJUST(OTHER_BSS
, other_bss
);
348 static void ieee80211_set_default_queues(struct ieee80211_sub_if_data
*sdata
)
350 struct ieee80211_local
*local
= sdata
->local
;
353 for (i
= 0; i
< IEEE80211_NUM_ACS
; i
++) {
354 if (local
->hw
.flags
& IEEE80211_HW_QUEUE_CONTROL
)
355 sdata
->vif
.hw_queue
[i
] = IEEE80211_INVAL_HW_QUEUE
;
356 else if (local
->hw
.queues
>= IEEE80211_NUM_ACS
)
357 sdata
->vif
.hw_queue
[i
] = i
;
359 sdata
->vif
.hw_queue
[i
] = 0;
361 sdata
->vif
.cab_queue
= IEEE80211_INVAL_HW_QUEUE
;
364 int ieee80211_add_virtual_monitor(struct ieee80211_local
*local
)
366 struct ieee80211_sub_if_data
*sdata
;
369 if (!(local
->hw
.flags
& IEEE80211_HW_WANT_MONITOR_VIF
))
374 if (local
->monitor_sdata
)
377 sdata
= kzalloc(sizeof(*sdata
) + local
->hw
.vif_data_size
, GFP_KERNEL
);
382 sdata
->local
= local
;
383 sdata
->vif
.type
= NL80211_IFTYPE_MONITOR
;
384 snprintf(sdata
->name
, IFNAMSIZ
, "%s-monitor",
385 wiphy_name(local
->hw
.wiphy
));
387 ieee80211_set_default_queues(sdata
);
389 ret
= drv_add_interface(local
, sdata
);
391 /* ok .. stupid driver, it asked for this! */
396 ret
= ieee80211_check_queues(sdata
);
402 ret
= ieee80211_vif_use_channel(sdata
, &local
->monitor_chandef
,
403 IEEE80211_CHANCTX_EXCLUSIVE
);
405 drv_remove_interface(local
, sdata
);
410 mutex_lock(&local
->iflist_mtx
);
411 rcu_assign_pointer(local
->monitor_sdata
, sdata
);
412 mutex_unlock(&local
->iflist_mtx
);
417 void ieee80211_del_virtual_monitor(struct ieee80211_local
*local
)
419 struct ieee80211_sub_if_data
*sdata
;
421 if (!(local
->hw
.flags
& IEEE80211_HW_WANT_MONITOR_VIF
))
426 mutex_lock(&local
->iflist_mtx
);
428 sdata
= rcu_dereference_protected(local
->monitor_sdata
,
429 lockdep_is_held(&local
->iflist_mtx
));
431 mutex_unlock(&local
->iflist_mtx
);
435 rcu_assign_pointer(local
->monitor_sdata
, NULL
);
436 mutex_unlock(&local
->iflist_mtx
);
440 ieee80211_vif_release_channel(sdata
);
442 drv_remove_interface(local
, sdata
);
448 * NOTE: Be very careful when changing this function, it must NOT return
449 * an error on interface type changes that have been pre-checked, so most
450 * checks should be in ieee80211_check_concurrent_iface.
452 int ieee80211_do_open(struct wireless_dev
*wdev
, bool coming_up
)
454 struct ieee80211_sub_if_data
*sdata
= IEEE80211_WDEV_TO_SUB_IF(wdev
);
455 struct net_device
*dev
= wdev
->netdev
;
456 struct ieee80211_local
*local
= sdata
->local
;
457 struct sta_info
*sta
;
460 u32 hw_reconf_flags
= 0;
462 switch (sdata
->vif
.type
) {
463 case NL80211_IFTYPE_WDS
:
464 if (!is_valid_ether_addr(sdata
->u
.wds
.remote_addr
))
467 case NL80211_IFTYPE_AP_VLAN
: {
468 struct ieee80211_sub_if_data
*master
;
473 list_add(&sdata
->u
.vlan
.list
, &sdata
->bss
->vlans
);
475 master
= container_of(sdata
->bss
,
476 struct ieee80211_sub_if_data
, u
.ap
);
477 sdata
->control_port_protocol
=
478 master
->control_port_protocol
;
479 sdata
->control_port_no_encrypt
=
480 master
->control_port_no_encrypt
;
481 sdata
->vif
.cab_queue
= master
->vif
.cab_queue
;
482 memcpy(sdata
->vif
.hw_queue
, master
->vif
.hw_queue
,
483 sizeof(sdata
->vif
.hw_queue
));
486 case NL80211_IFTYPE_AP
:
487 sdata
->bss
= &sdata
->u
.ap
;
489 case NL80211_IFTYPE_MESH_POINT
:
490 case NL80211_IFTYPE_STATION
:
491 case NL80211_IFTYPE_MONITOR
:
492 case NL80211_IFTYPE_ADHOC
:
493 case NL80211_IFTYPE_P2P_DEVICE
:
494 /* no special treatment */
496 case NL80211_IFTYPE_UNSPECIFIED
:
497 case NUM_NL80211_IFTYPES
:
498 case NL80211_IFTYPE_P2P_CLIENT
:
499 case NL80211_IFTYPE_P2P_GO
:
505 if (local
->open_count
== 0) {
506 res
= drv_start(local
);
509 /* we're brought up, everything changes */
510 hw_reconf_flags
= ~0;
511 ieee80211_led_radio(local
, true);
512 ieee80211_mod_tpt_led_trig(local
,
513 IEEE80211_TPT_LEDTRIG_FL_RADIO
, 0);
517 * Copy the hopefully now-present MAC address to
518 * this interface, if it has the special null one.
520 if (dev
&& is_zero_ether_addr(dev
->dev_addr
)) {
521 memcpy(dev
->dev_addr
,
522 local
->hw
.wiphy
->perm_addr
,
524 memcpy(dev
->perm_addr
, dev
->dev_addr
, ETH_ALEN
);
526 if (!is_valid_ether_addr(dev
->dev_addr
)) {
527 res
= -EADDRNOTAVAIL
;
532 switch (sdata
->vif
.type
) {
533 case NL80211_IFTYPE_AP_VLAN
:
534 /* no need to tell driver, but set carrier and chanctx */
535 if (rtnl_dereference(sdata
->bss
->beacon
)) {
536 ieee80211_vif_vlan_copy_chanctx(sdata
);
537 netif_carrier_on(dev
);
539 netif_carrier_off(dev
);
542 case NL80211_IFTYPE_MONITOR
:
543 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
544 local
->cooked_mntrs
++;
548 if (local
->monitors
== 0 && local
->open_count
== 0) {
549 res
= ieee80211_add_virtual_monitor(local
);
554 /* must be before the call to ieee80211_configure_filter */
556 if (local
->monitors
== 1) {
557 local
->hw
.conf
.flags
|= IEEE80211_CONF_MONITOR
;
558 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
561 ieee80211_adjust_monitor_flags(sdata
, 1);
562 ieee80211_configure_filter(local
);
563 mutex_lock(&local
->mtx
);
564 ieee80211_recalc_idle(local
);
565 mutex_unlock(&local
->mtx
);
567 netif_carrier_on(dev
);
571 ieee80211_del_virtual_monitor(local
);
573 res
= drv_add_interface(local
, sdata
);
576 res
= ieee80211_check_queues(sdata
);
578 goto err_del_interface
;
581 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
583 local
->fif_probe_req
++;
585 ieee80211_configure_filter(local
);
586 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
587 local
->fif_probe_req
++;
590 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
)
591 changed
|= ieee80211_reset_erp_info(sdata
);
592 ieee80211_bss_info_change_notify(sdata
, changed
);
594 switch (sdata
->vif
.type
) {
595 case NL80211_IFTYPE_STATION
:
596 case NL80211_IFTYPE_ADHOC
:
597 case NL80211_IFTYPE_AP
:
598 case NL80211_IFTYPE_MESH_POINT
:
599 netif_carrier_off(dev
);
601 case NL80211_IFTYPE_WDS
:
602 case NL80211_IFTYPE_P2P_DEVICE
:
610 * set default queue parameters so drivers don't
611 * need to initialise the hardware if the hardware
612 * doesn't start up with sane defaults
614 ieee80211_set_wmm_default(sdata
, true);
617 set_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
619 if (sdata
->vif
.type
== NL80211_IFTYPE_WDS
) {
620 /* Create STA entry for the WDS peer */
621 sta
= sta_info_alloc(sdata
, sdata
->u
.wds
.remote_addr
,
625 goto err_del_interface
;
628 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTH
);
629 sta_info_pre_move_state(sta
, IEEE80211_STA_ASSOC
);
630 sta_info_pre_move_state(sta
, IEEE80211_STA_AUTHORIZED
);
632 res
= sta_info_insert(sta
);
634 /* STA has been freed */
635 goto err_del_interface
;
638 rate_control_rate_init(sta
);
639 netif_carrier_on(dev
);
640 } else if (sdata
->vif
.type
== NL80211_IFTYPE_P2P_DEVICE
) {
641 rcu_assign_pointer(local
->p2p_sdata
, sdata
);
645 * set_multicast_list will be invoked by the networking core
646 * which will check whether any increments here were done in
647 * error and sync them down to the hardware as filter flags.
649 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
650 atomic_inc(&local
->iff_allmultis
);
652 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
653 atomic_inc(&local
->iff_promiscs
);
659 ieee80211_hw_config(local
, hw_reconf_flags
);
661 ieee80211_recalc_ps(local
, -1);
663 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
||
664 sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
665 /* XXX: for AP_VLAN, actually track AP queues */
666 netif_tx_start_all_queues(dev
);
669 int n_acs
= IEEE80211_NUM_ACS
;
672 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
675 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
676 if (sdata
->vif
.cab_queue
== IEEE80211_INVAL_HW_QUEUE
||
677 (local
->queue_stop_reasons
[sdata
->vif
.cab_queue
] == 0 &&
678 skb_queue_empty(&local
->pending
[sdata
->vif
.cab_queue
]))) {
679 for (ac
= 0; ac
< n_acs
; ac
++) {
680 int ac_queue
= sdata
->vif
.hw_queue
[ac
];
682 if (local
->queue_stop_reasons
[ac_queue
] == 0 &&
683 skb_queue_empty(&local
->pending
[ac_queue
]))
684 netif_start_subqueue(dev
, ac
);
687 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
692 drv_remove_interface(local
, sdata
);
694 if (!local
->open_count
)
698 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
699 list_del(&sdata
->u
.vlan
.list
);
700 /* might already be clear but that doesn't matter */
701 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
705 static int ieee80211_open(struct net_device
*dev
)
707 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
710 /* fail early if user set an invalid address */
711 if (!is_valid_ether_addr(dev
->dev_addr
))
712 return -EADDRNOTAVAIL
;
714 err
= ieee80211_check_concurrent_iface(sdata
, sdata
->vif
.type
);
718 return ieee80211_do_open(&sdata
->wdev
, true);
721 static void ieee80211_do_stop(struct ieee80211_sub_if_data
*sdata
,
724 struct ieee80211_local
*local
= sdata
->local
;
726 struct sk_buff
*skb
, *tmp
;
727 u32 hw_reconf_flags
= 0;
731 clear_bit(SDATA_STATE_RUNNING
, &sdata
->state
);
733 if (rcu_access_pointer(local
->scan_sdata
) == sdata
)
734 ieee80211_scan_cancel(local
);
737 * Stop TX on this interface first.
740 netif_tx_stop_all_queues(sdata
->dev
);
742 ieee80211_roc_purge(local
, sdata
);
744 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
745 ieee80211_mgd_stop(sdata
);
748 * Remove all stations associated with this interface.
750 * This must be done before calling ops->remove_interface()
751 * because otherwise we can later invoke ops->sta_notify()
752 * whenever the STAs are removed, and that invalidates driver
753 * assumptions about always getting a vif pointer that is valid
754 * (because if we remove a STA after ops->remove_interface()
755 * the driver will have removed the vif info already!)
757 * This is relevant only in WDS mode, in all other modes we've
758 * already removed all stations when disconnecting or similar,
761 * We call sta_info_flush_cleanup() later, to combine RCU waits.
763 flushed
= sta_info_flush_defer(sdata
);
764 WARN_ON_ONCE((sdata
->vif
.type
!= NL80211_IFTYPE_WDS
&& flushed
> 0) ||
765 (sdata
->vif
.type
== NL80211_IFTYPE_WDS
&& flushed
!= 1));
767 /* don't count this interface for promisc/allmulti while it is down */
768 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
769 atomic_dec(&local
->iff_allmultis
);
771 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
772 atomic_dec(&local
->iff_promiscs
);
774 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
776 local
->fif_probe_req
--;
777 } else if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
778 local
->fif_probe_req
--;
782 netif_addr_lock_bh(sdata
->dev
);
783 spin_lock_bh(&local
->filter_lock
);
784 __hw_addr_unsync(&local
->mc_list
, &sdata
->dev
->mc
,
785 sdata
->dev
->addr_len
);
786 spin_unlock_bh(&local
->filter_lock
);
787 netif_addr_unlock_bh(sdata
->dev
);
790 del_timer_sync(&local
->dynamic_ps_timer
);
791 cancel_work_sync(&local
->dynamic_ps_enable_work
);
793 cancel_work_sync(&sdata
->recalc_smps
);
795 cancel_delayed_work_sync(&sdata
->dfs_cac_timer_work
);
797 if (sdata
->wdev
.cac_started
) {
798 WARN_ON(local
->suspended
);
799 mutex_lock(&local
->iflist_mtx
);
800 ieee80211_vif_release_channel(sdata
);
801 mutex_unlock(&local
->iflist_mtx
);
802 cfg80211_cac_event(sdata
->dev
, NL80211_RADAR_CAC_ABORTED
,
806 /* APs need special treatment */
807 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
808 struct ieee80211_sub_if_data
*vlan
, *tmpsdata
;
810 /* down all dependent devices, that is VLANs */
811 list_for_each_entry_safe(vlan
, tmpsdata
, &sdata
->u
.ap
.vlans
,
813 dev_close(vlan
->dev
);
814 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
815 } else if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
) {
816 /* remove all packets in parent bc_buf pointing to this dev */
817 ps
= &sdata
->bss
->ps
;
819 spin_lock_irqsave(&ps
->bc_buf
.lock
, flags
);
820 skb_queue_walk_safe(&ps
->bc_buf
, skb
, tmp
) {
821 if (skb
->dev
== sdata
->dev
) {
822 __skb_unlink(skb
, &ps
->bc_buf
);
823 local
->total_ps_buffered
--;
824 ieee80211_free_txskb(&local
->hw
, skb
);
827 spin_unlock_irqrestore(&ps
->bc_buf
.lock
, flags
);
833 switch (sdata
->vif
.type
) {
834 case NL80211_IFTYPE_AP_VLAN
:
835 list_del(&sdata
->u
.vlan
.list
);
836 rcu_assign_pointer(sdata
->vif
.chanctx_conf
, NULL
);
837 /* no need to tell driver */
839 case NL80211_IFTYPE_MONITOR
:
840 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
841 local
->cooked_mntrs
--;
846 if (local
->monitors
== 0) {
847 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_MONITOR
;
848 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
851 ieee80211_adjust_monitor_flags(sdata
, -1);
853 case NL80211_IFTYPE_P2P_DEVICE
:
854 /* relies on synchronize_rcu() below */
855 rcu_assign_pointer(local
->p2p_sdata
, NULL
);
858 cancel_work_sync(&sdata
->work
);
860 * When we get here, the interface is marked down.
862 * sta_info_flush_cleanup() requires rcu_barrier()
863 * first to wait for the station call_rcu() calls
864 * to complete, and we also need synchronize_rcu()
865 * to wait for the RX path in case it is using the
866 * interface and enqueuing frames at this very time on
871 sta_info_flush_cleanup(sdata
);
874 * Free all remaining keys, there shouldn't be any,
875 * except maybe in WDS mode?
877 ieee80211_free_keys(sdata
);
880 case NL80211_IFTYPE_AP
:
881 skb_queue_purge(&sdata
->skb_queue
);
886 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
887 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
888 skb_queue_walk_safe(&local
->pending
[i
], skb
, tmp
) {
889 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
890 if (info
->control
.vif
== &sdata
->vif
) {
891 __skb_unlink(skb
, &local
->pending
[i
]);
892 ieee80211_free_txskb(&local
->hw
, skb
);
896 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
898 if (local
->open_count
== 0)
899 ieee80211_clear_tx_pending(local
);
902 * If the interface goes down while suspended, presumably because
903 * the device was unplugged and that happens before our resume,
904 * then the driver is already unconfigured and the remainder of
905 * this function isn't needed.
906 * XXX: what about WoWLAN? If the device has software state, e.g.
907 * memory allocated, it might expect teardown commands from
910 if (local
->suspended
) {
911 WARN_ON(local
->wowlan
);
912 WARN_ON(rtnl_dereference(local
->monitor_sdata
));
916 switch (sdata
->vif
.type
) {
917 case NL80211_IFTYPE_AP_VLAN
:
919 case NL80211_IFTYPE_MONITOR
:
920 if (local
->monitors
== 0)
921 ieee80211_del_virtual_monitor(local
);
923 mutex_lock(&local
->mtx
);
924 ieee80211_recalc_idle(local
);
925 mutex_unlock(&local
->mtx
);
929 drv_remove_interface(local
, sdata
);
932 ieee80211_recalc_ps(local
, -1);
934 if (local
->open_count
== 0) {
935 ieee80211_stop_device(local
);
937 /* no reconfiguring after stop! */
941 /* do after stop to avoid reconfiguring when we stop anyway */
942 ieee80211_configure_filter(local
);
943 ieee80211_hw_config(local
, hw_reconf_flags
);
945 if (local
->monitors
== local
->open_count
)
946 ieee80211_add_virtual_monitor(local
);
949 static int ieee80211_stop(struct net_device
*dev
)
951 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
953 ieee80211_do_stop(sdata
, true);
958 static void ieee80211_set_multicast_list(struct net_device
*dev
)
960 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
961 struct ieee80211_local
*local
= sdata
->local
;
962 int allmulti
, promisc
, sdata_allmulti
, sdata_promisc
;
964 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
965 promisc
= !!(dev
->flags
& IFF_PROMISC
);
966 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
967 sdata_promisc
= !!(sdata
->flags
& IEEE80211_SDATA_PROMISC
);
969 if (allmulti
!= sdata_allmulti
) {
970 if (dev
->flags
& IFF_ALLMULTI
)
971 atomic_inc(&local
->iff_allmultis
);
973 atomic_dec(&local
->iff_allmultis
);
974 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
977 if (promisc
!= sdata_promisc
) {
978 if (dev
->flags
& IFF_PROMISC
)
979 atomic_inc(&local
->iff_promiscs
);
981 atomic_dec(&local
->iff_promiscs
);
982 sdata
->flags
^= IEEE80211_SDATA_PROMISC
;
986 * TODO: If somebody needs this on AP interfaces,
987 * it can be enabled easily but multicast
988 * addresses from VLANs need to be synced.
990 if (sdata
->vif
.type
!= NL80211_IFTYPE_MONITOR
&&
991 sdata
->vif
.type
!= NL80211_IFTYPE_AP_VLAN
&&
992 sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
993 drv_set_multicast_list(local
, sdata
, &dev
->mc
);
995 spin_lock_bh(&local
->filter_lock
);
996 __hw_addr_sync(&local
->mc_list
, &dev
->mc
, dev
->addr_len
);
997 spin_unlock_bh(&local
->filter_lock
);
998 ieee80211_queue_work(&local
->hw
, &local
->reconfig_filter
);
1002 * Called when the netdev is removed or, by the code below, before
1003 * the interface type changes.
1005 static void ieee80211_teardown_sdata(struct ieee80211_sub_if_data
*sdata
)
1010 /* free extra data */
1011 ieee80211_free_keys(sdata
);
1013 ieee80211_debugfs_remove_netdev(sdata
);
1015 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
1016 __skb_queue_purge(&sdata
->fragments
[i
].skb_list
);
1017 sdata
->fragment_next
= 0;
1019 if (ieee80211_vif_is_mesh(&sdata
->vif
))
1020 mesh_rmc_free(sdata
);
1022 flushed
= sta_info_flush(sdata
);
1026 static void ieee80211_uninit(struct net_device
*dev
)
1028 ieee80211_teardown_sdata(IEEE80211_DEV_TO_SUB_IF(dev
));
1031 static u16
ieee80211_netdev_select_queue(struct net_device
*dev
,
1032 struct sk_buff
*skb
)
1034 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev
), skb
);
1037 static const struct net_device_ops ieee80211_dataif_ops
= {
1038 .ndo_open
= ieee80211_open
,
1039 .ndo_stop
= ieee80211_stop
,
1040 .ndo_uninit
= ieee80211_uninit
,
1041 .ndo_start_xmit
= ieee80211_subif_start_xmit
,
1042 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
1043 .ndo_change_mtu
= ieee80211_change_mtu
,
1044 .ndo_set_mac_address
= ieee80211_change_mac
,
1045 .ndo_select_queue
= ieee80211_netdev_select_queue
,
1048 static u16
ieee80211_monitor_select_queue(struct net_device
*dev
,
1049 struct sk_buff
*skb
)
1051 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1052 struct ieee80211_local
*local
= sdata
->local
;
1053 struct ieee80211_hdr
*hdr
;
1054 struct ieee80211_radiotap_header
*rtap
= (void *)skb
->data
;
1056 if (local
->hw
.queues
< IEEE80211_NUM_ACS
)
1060 skb
->len
< le16_to_cpu(rtap
->it_len
) + 2 /* frame control */)
1061 return 0; /* doesn't matter, frame will be dropped */
1063 hdr
= (void *)((u8
*)skb
->data
+ le16_to_cpu(rtap
->it_len
));
1065 return ieee80211_select_queue_80211(sdata
, skb
, hdr
);
1068 static const struct net_device_ops ieee80211_monitorif_ops
= {
1069 .ndo_open
= ieee80211_open
,
1070 .ndo_stop
= ieee80211_stop
,
1071 .ndo_uninit
= ieee80211_uninit
,
1072 .ndo_start_xmit
= ieee80211_monitor_start_xmit
,
1073 .ndo_set_rx_mode
= ieee80211_set_multicast_list
,
1074 .ndo_change_mtu
= ieee80211_change_mtu
,
1075 .ndo_set_mac_address
= eth_mac_addr
,
1076 .ndo_select_queue
= ieee80211_monitor_select_queue
,
1079 static void ieee80211_if_setup(struct net_device
*dev
)
1082 dev
->priv_flags
&= ~IFF_TX_SKB_SHARING
;
1083 dev
->netdev_ops
= &ieee80211_dataif_ops
;
1084 dev
->destructor
= free_netdev
;
1087 static void ieee80211_iface_work(struct work_struct
*work
)
1089 struct ieee80211_sub_if_data
*sdata
=
1090 container_of(work
, struct ieee80211_sub_if_data
, work
);
1091 struct ieee80211_local
*local
= sdata
->local
;
1092 struct sk_buff
*skb
;
1093 struct sta_info
*sta
;
1094 struct ieee80211_ra_tid
*ra_tid
;
1096 if (!ieee80211_sdata_running(sdata
))
1099 if (local
->scanning
)
1103 * ieee80211_queue_work() should have picked up most cases,
1104 * here we'll pick the rest.
1106 if (WARN(local
->suspended
,
1107 "interface work scheduled while going to suspend\n"))
1110 /* first process frames */
1111 while ((skb
= skb_dequeue(&sdata
->skb_queue
))) {
1112 struct ieee80211_mgmt
*mgmt
= (void *)skb
->data
;
1114 if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_START
) {
1115 ra_tid
= (void *)&skb
->cb
;
1116 ieee80211_start_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
1118 } else if (skb
->pkt_type
== IEEE80211_SDATA_QUEUE_AGG_STOP
) {
1119 ra_tid
= (void *)&skb
->cb
;
1120 ieee80211_stop_tx_ba_cb(&sdata
->vif
, ra_tid
->ra
,
1122 } else if (ieee80211_is_action(mgmt
->frame_control
) &&
1123 mgmt
->u
.action
.category
== WLAN_CATEGORY_BACK
) {
1126 mutex_lock(&local
->sta_mtx
);
1127 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
1129 switch (mgmt
->u
.action
.u
.addba_req
.action_code
) {
1130 case WLAN_ACTION_ADDBA_REQ
:
1131 ieee80211_process_addba_request(
1132 local
, sta
, mgmt
, len
);
1134 case WLAN_ACTION_ADDBA_RESP
:
1135 ieee80211_process_addba_resp(local
, sta
,
1138 case WLAN_ACTION_DELBA
:
1139 ieee80211_process_delba(sdata
, sta
,
1147 mutex_unlock(&local
->sta_mtx
);
1148 } else if (ieee80211_is_data_qos(mgmt
->frame_control
)) {
1149 struct ieee80211_hdr
*hdr
= (void *)mgmt
;
1151 * So the frame isn't mgmt, but frame_control
1152 * is at the right place anyway, of course, so
1153 * the if statement is correct.
1155 * Warn if we have other data frame types here,
1156 * they must not get here.
1158 WARN_ON(hdr
->frame_control
&
1159 cpu_to_le16(IEEE80211_STYPE_NULLFUNC
));
1160 WARN_ON(!(hdr
->seq_ctrl
&
1161 cpu_to_le16(IEEE80211_SCTL_FRAG
)));
1163 * This was a fragment of a frame, received while
1164 * a block-ack session was active. That cannot be
1165 * right, so terminate the session.
1167 mutex_lock(&local
->sta_mtx
);
1168 sta
= sta_info_get_bss(sdata
, mgmt
->sa
);
1170 u16 tid
= *ieee80211_get_qos_ctl(hdr
) &
1171 IEEE80211_QOS_CTL_TID_MASK
;
1173 __ieee80211_stop_rx_ba_session(
1174 sta
, tid
, WLAN_BACK_RECIPIENT
,
1175 WLAN_REASON_QSTA_REQUIRE_SETUP
,
1178 mutex_unlock(&local
->sta_mtx
);
1179 } else switch (sdata
->vif
.type
) {
1180 case NL80211_IFTYPE_STATION
:
1181 ieee80211_sta_rx_queued_mgmt(sdata
, skb
);
1183 case NL80211_IFTYPE_ADHOC
:
1184 ieee80211_ibss_rx_queued_mgmt(sdata
, skb
);
1186 case NL80211_IFTYPE_MESH_POINT
:
1187 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
1189 ieee80211_mesh_rx_queued_mgmt(sdata
, skb
);
1192 WARN(1, "frame for unexpected interface type");
1199 /* then other type-dependent work */
1200 switch (sdata
->vif
.type
) {
1201 case NL80211_IFTYPE_STATION
:
1202 ieee80211_sta_work(sdata
);
1204 case NL80211_IFTYPE_ADHOC
:
1205 ieee80211_ibss_work(sdata
);
1207 case NL80211_IFTYPE_MESH_POINT
:
1208 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
1210 ieee80211_mesh_work(sdata
);
1217 static void ieee80211_recalc_smps_work(struct work_struct
*work
)
1219 struct ieee80211_sub_if_data
*sdata
=
1220 container_of(work
, struct ieee80211_sub_if_data
, recalc_smps
);
1222 ieee80211_recalc_smps(sdata
);
1226 * Helper function to initialise an interface to a specific type.
1228 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data
*sdata
,
1229 enum nl80211_iftype type
)
1231 /* clear type-dependent union */
1232 memset(&sdata
->u
, 0, sizeof(sdata
->u
));
1234 /* and set some type-dependent values */
1235 sdata
->vif
.type
= type
;
1236 sdata
->vif
.p2p
= false;
1237 sdata
->wdev
.iftype
= type
;
1239 sdata
->control_port_protocol
= cpu_to_be16(ETH_P_PAE
);
1240 sdata
->control_port_no_encrypt
= false;
1242 sdata
->noack_map
= 0;
1244 /* only monitor/p2p-device differ */
1246 sdata
->dev
->netdev_ops
= &ieee80211_dataif_ops
;
1247 sdata
->dev
->type
= ARPHRD_ETHER
;
1250 skb_queue_head_init(&sdata
->skb_queue
);
1251 INIT_WORK(&sdata
->work
, ieee80211_iface_work
);
1252 INIT_WORK(&sdata
->recalc_smps
, ieee80211_recalc_smps_work
);
1255 case NL80211_IFTYPE_P2P_GO
:
1256 type
= NL80211_IFTYPE_AP
;
1257 sdata
->vif
.type
= type
;
1258 sdata
->vif
.p2p
= true;
1260 case NL80211_IFTYPE_AP
:
1261 skb_queue_head_init(&sdata
->u
.ap
.ps
.bc_buf
);
1262 INIT_LIST_HEAD(&sdata
->u
.ap
.vlans
);
1263 sdata
->vif
.bss_conf
.bssid
= sdata
->vif
.addr
;
1265 case NL80211_IFTYPE_P2P_CLIENT
:
1266 type
= NL80211_IFTYPE_STATION
;
1267 sdata
->vif
.type
= type
;
1268 sdata
->vif
.p2p
= true;
1270 case NL80211_IFTYPE_STATION
:
1271 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.mgd
.bssid
;
1272 ieee80211_sta_setup_sdata(sdata
);
1274 case NL80211_IFTYPE_ADHOC
:
1275 sdata
->vif
.bss_conf
.bssid
= sdata
->u
.ibss
.bssid
;
1276 ieee80211_ibss_setup_sdata(sdata
);
1278 case NL80211_IFTYPE_MESH_POINT
:
1279 if (ieee80211_vif_is_mesh(&sdata
->vif
))
1280 ieee80211_mesh_init_sdata(sdata
);
1282 case NL80211_IFTYPE_MONITOR
:
1283 sdata
->dev
->type
= ARPHRD_IEEE80211_RADIOTAP
;
1284 sdata
->dev
->netdev_ops
= &ieee80211_monitorif_ops
;
1285 sdata
->u
.mntr_flags
= MONITOR_FLAG_CONTROL
|
1286 MONITOR_FLAG_OTHER_BSS
;
1288 case NL80211_IFTYPE_WDS
:
1289 sdata
->vif
.bss_conf
.bssid
= NULL
;
1291 case NL80211_IFTYPE_AP_VLAN
:
1293 case NL80211_IFTYPE_P2P_DEVICE
:
1294 sdata
->vif
.bss_conf
.bssid
= sdata
->vif
.addr
;
1296 case NL80211_IFTYPE_UNSPECIFIED
:
1297 case NUM_NL80211_IFTYPES
:
1302 ieee80211_debugfs_add_netdev(sdata
);
1305 static int ieee80211_runtime_change_iftype(struct ieee80211_sub_if_data
*sdata
,
1306 enum nl80211_iftype type
)
1308 struct ieee80211_local
*local
= sdata
->local
;
1310 enum nl80211_iftype internal_type
= type
;
1315 if (!local
->ops
->change_interface
)
1318 switch (sdata
->vif
.type
) {
1319 case NL80211_IFTYPE_AP
:
1320 case NL80211_IFTYPE_STATION
:
1321 case NL80211_IFTYPE_ADHOC
:
1323 * Could maybe also all others here?
1324 * Just not sure how that interacts
1325 * with the RX/config path e.g. for
1334 case NL80211_IFTYPE_AP
:
1335 case NL80211_IFTYPE_STATION
:
1336 case NL80211_IFTYPE_ADHOC
:
1338 * Could probably support everything
1339 * but WDS here (WDS do_open can fail
1340 * under memory pressure, which this
1341 * code isn't prepared to handle).
1344 case NL80211_IFTYPE_P2P_CLIENT
:
1346 internal_type
= NL80211_IFTYPE_STATION
;
1348 case NL80211_IFTYPE_P2P_GO
:
1350 internal_type
= NL80211_IFTYPE_AP
;
1356 ret
= ieee80211_check_concurrent_iface(sdata
, internal_type
);
1360 ieee80211_do_stop(sdata
, false);
1362 ieee80211_teardown_sdata(sdata
);
1364 ret
= drv_change_interface(local
, sdata
, internal_type
, p2p
);
1366 type
= sdata
->vif
.type
;
1369 * Ignore return value here, there's not much we can do since
1370 * the driver changed the interface type internally already.
1371 * The warnings will hopefully make driver authors fix it :-)
1373 ieee80211_check_queues(sdata
);
1375 ieee80211_setup_sdata(sdata
, type
);
1377 err
= ieee80211_do_open(&sdata
->wdev
, false);
1378 WARN(err
, "type change: do_open returned %d", err
);
1383 int ieee80211_if_change_type(struct ieee80211_sub_if_data
*sdata
,
1384 enum nl80211_iftype type
)
1390 if (type
== ieee80211_vif_type_p2p(&sdata
->vif
))
1393 if (ieee80211_sdata_running(sdata
)) {
1394 ret
= ieee80211_runtime_change_iftype(sdata
, type
);
1398 /* Purge and reset type-dependent state. */
1399 ieee80211_teardown_sdata(sdata
);
1400 ieee80211_setup_sdata(sdata
, type
);
1403 /* reset some values that shouldn't be kept across type changes */
1404 sdata
->drop_unencrypted
= 0;
1405 if (type
== NL80211_IFTYPE_STATION
)
1406 sdata
->u
.mgd
.use_4addr
= false;
1411 static void ieee80211_assign_perm_addr(struct ieee80211_local
*local
,
1412 u8
*perm_addr
, enum nl80211_iftype type
)
1414 struct ieee80211_sub_if_data
*sdata
;
1415 u64 mask
, start
, addr
, val
, inc
;
1417 u8 tmp_addr
[ETH_ALEN
];
1420 /* default ... something at least */
1421 memcpy(perm_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
1423 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
) &&
1424 local
->hw
.wiphy
->n_addresses
<= 1)
1427 mutex_lock(&local
->iflist_mtx
);
1430 case NL80211_IFTYPE_MONITOR
:
1431 /* doesn't matter */
1433 case NL80211_IFTYPE_WDS
:
1434 case NL80211_IFTYPE_AP_VLAN
:
1435 /* match up with an AP interface */
1436 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1437 if (sdata
->vif
.type
!= NL80211_IFTYPE_AP
)
1439 memcpy(perm_addr
, sdata
->vif
.addr
, ETH_ALEN
);
1442 /* keep default if no AP interface present */
1444 case NL80211_IFTYPE_P2P_CLIENT
:
1445 case NL80211_IFTYPE_P2P_GO
:
1446 if (local
->hw
.flags
& IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF
) {
1447 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1448 if (sdata
->vif
.type
!= NL80211_IFTYPE_P2P_DEVICE
)
1450 if (!ieee80211_sdata_running(sdata
))
1452 memcpy(perm_addr
, sdata
->vif
.addr
, ETH_ALEN
);
1456 /* otherwise fall through */
1458 /* assign a new address if possible -- try n_addresses first */
1459 for (i
= 0; i
< local
->hw
.wiphy
->n_addresses
; i
++) {
1462 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1463 if (memcmp(local
->hw
.wiphy
->addresses
[i
].addr
,
1464 sdata
->vif
.addr
, ETH_ALEN
) == 0) {
1472 local
->hw
.wiphy
->addresses
[i
].addr
,
1478 /* try mask if available */
1479 if (is_zero_ether_addr(local
->hw
.wiphy
->addr_mask
))
1482 m
= local
->hw
.wiphy
->addr_mask
;
1483 mask
= ((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 if (__ffs64(mask
) + hweight64(mask
) != fls64(mask
)) {
1488 /* not a contiguous mask ... not handled now! */
1489 pr_info("not contiguous\n");
1494 * Pick address of existing interface in case user changed
1495 * MAC address manually, default to perm_addr.
1497 m
= local
->hw
.wiphy
->perm_addr
;
1498 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1499 if (sdata
->vif
.type
== NL80211_IFTYPE_MONITOR
)
1501 m
= sdata
->vif
.addr
;
1504 start
= ((u64
)m
[0] << 5*8) | ((u64
)m
[1] << 4*8) |
1505 ((u64
)m
[2] << 3*8) | ((u64
)m
[3] << 2*8) |
1506 ((u64
)m
[4] << 1*8) | ((u64
)m
[5] << 0*8);
1508 inc
= 1ULL<<__ffs64(mask
);
1509 val
= (start
& mask
);
1510 addr
= (start
& ~mask
) | (val
& mask
);
1514 tmp_addr
[5] = addr
>> 0*8;
1515 tmp_addr
[4] = addr
>> 1*8;
1516 tmp_addr
[3] = addr
>> 2*8;
1517 tmp_addr
[2] = addr
>> 3*8;
1518 tmp_addr
[1] = addr
>> 4*8;
1519 tmp_addr
[0] = addr
>> 5*8;
1523 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
1524 if (memcmp(tmp_addr
, sdata
->vif
.addr
,
1532 memcpy(perm_addr
, tmp_addr
, ETH_ALEN
);
1535 addr
= (start
& ~mask
) | (val
& mask
);
1536 } while (addr
!= start
);
1542 mutex_unlock(&local
->iflist_mtx
);
1545 static void ieee80211_cleanup_sdata_stas_wk(struct work_struct
*wk
)
1547 struct ieee80211_sub_if_data
*sdata
;
1549 sdata
= container_of(wk
, struct ieee80211_sub_if_data
, cleanup_stations_wk
);
1551 ieee80211_cleanup_sdata_stas(sdata
);
1554 int ieee80211_if_add(struct ieee80211_local
*local
, const char *name
,
1555 struct wireless_dev
**new_wdev
, enum nl80211_iftype type
,
1556 struct vif_params
*params
)
1558 struct net_device
*ndev
= NULL
;
1559 struct ieee80211_sub_if_data
*sdata
= NULL
;
1565 if (type
== NL80211_IFTYPE_P2P_DEVICE
) {
1566 struct wireless_dev
*wdev
;
1568 sdata
= kzalloc(sizeof(*sdata
) + local
->hw
.vif_data_size
,
1572 wdev
= &sdata
->wdev
;
1575 strlcpy(sdata
->name
, name
, IFNAMSIZ
);
1576 ieee80211_assign_perm_addr(local
, wdev
->address
, type
);
1577 memcpy(sdata
->vif
.addr
, wdev
->address
, ETH_ALEN
);
1579 if (local
->hw
.queues
>= IEEE80211_NUM_ACS
)
1580 txqs
= IEEE80211_NUM_ACS
;
1582 ndev
= alloc_netdev_mqs(sizeof(*sdata
) +
1583 local
->hw
.vif_data_size
,
1584 name
, ieee80211_if_setup
, txqs
, 1);
1587 dev_net_set(ndev
, wiphy_net(local
->hw
.wiphy
));
1589 ndev
->needed_headroom
= local
->tx_headroom
+
1590 4*6 /* four MAC addresses */
1591 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
1593 + 8 /* rfc1042/bridge tunnel */
1594 - ETH_HLEN
/* ethernet hard_header_len */
1595 + IEEE80211_ENCRYPT_HEADROOM
;
1596 ndev
->needed_tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
1598 ret
= dev_alloc_name(ndev
, ndev
->name
);
1604 ieee80211_assign_perm_addr(local
, ndev
->perm_addr
, type
);
1605 memcpy(ndev
->dev_addr
, ndev
->perm_addr
, ETH_ALEN
);
1606 SET_NETDEV_DEV(ndev
, wiphy_dev(local
->hw
.wiphy
));
1608 /* don't use IEEE80211_DEV_TO_SUB_IF -- it checks too much */
1609 sdata
= netdev_priv(ndev
);
1610 ndev
->ieee80211_ptr
= &sdata
->wdev
;
1611 memcpy(sdata
->vif
.addr
, ndev
->dev_addr
, ETH_ALEN
);
1612 memcpy(sdata
->name
, ndev
->name
, IFNAMSIZ
);
1617 /* initialise type-independent data */
1618 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
1619 sdata
->local
= local
;
1621 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
1622 skb_queue_head_init(&sdata
->fragments
[i
].skb_list
);
1624 INIT_LIST_HEAD(&sdata
->key_list
);
1626 spin_lock_init(&sdata
->cleanup_stations_lock
);
1627 INIT_LIST_HEAD(&sdata
->cleanup_stations
);
1628 INIT_WORK(&sdata
->cleanup_stations_wk
, ieee80211_cleanup_sdata_stas_wk
);
1629 INIT_DELAYED_WORK(&sdata
->dfs_cac_timer_work
,
1630 ieee80211_dfs_cac_timer_work
);
1631 INIT_DELAYED_WORK(&sdata
->dec_tailroom_needed_wk
,
1632 ieee80211_delayed_tailroom_dec
);
1634 for (i
= 0; i
< IEEE80211_NUM_BANDS
; i
++) {
1635 struct ieee80211_supported_band
*sband
;
1636 sband
= local
->hw
.wiphy
->bands
[i
];
1637 sdata
->rc_rateidx_mask
[i
] =
1638 sband
? (1 << sband
->n_bitrates
) - 1 : 0;
1640 memcpy(sdata
->rc_rateidx_mcs_mask
[i
],
1641 sband
->ht_cap
.mcs
.rx_mask
,
1642 sizeof(sdata
->rc_rateidx_mcs_mask
[i
]));
1644 memset(sdata
->rc_rateidx_mcs_mask
[i
], 0,
1645 sizeof(sdata
->rc_rateidx_mcs_mask
[i
]));
1648 ieee80211_set_default_queues(sdata
);
1650 sdata
->ap_power_level
= IEEE80211_UNSET_POWER_LEVEL
;
1651 sdata
->user_power_level
= local
->user_power_level
;
1653 /* setup type-dependent data */
1654 ieee80211_setup_sdata(sdata
, type
);
1658 ndev
->ieee80211_ptr
->use_4addr
= params
->use_4addr
;
1659 if (type
== NL80211_IFTYPE_STATION
)
1660 sdata
->u
.mgd
.use_4addr
= params
->use_4addr
;
1663 ndev
->features
|= local
->hw
.netdev_features
;
1665 ret
= register_netdevice(ndev
);
1672 mutex_lock(&local
->iflist_mtx
);
1673 list_add_tail_rcu(&sdata
->list
, &local
->interfaces
);
1674 mutex_unlock(&local
->iflist_mtx
);
1677 *new_wdev
= &sdata
->wdev
;
1682 void ieee80211_if_remove(struct ieee80211_sub_if_data
*sdata
)
1686 mutex_lock(&sdata
->local
->iflist_mtx
);
1687 list_del_rcu(&sdata
->list
);
1688 mutex_unlock(&sdata
->local
->iflist_mtx
);
1693 unregister_netdevice(sdata
->dev
);
1695 cfg80211_unregister_wdev(&sdata
->wdev
);
1700 void ieee80211_sdata_stop(struct ieee80211_sub_if_data
*sdata
)
1702 if (WARN_ON_ONCE(!test_bit(SDATA_STATE_RUNNING
, &sdata
->state
)))
1704 ieee80211_do_stop(sdata
, true);
1705 ieee80211_teardown_sdata(sdata
);
1709 * Remove all interfaces, may only be called at hardware unregistration
1710 * time because it doesn't do RCU-safe list removals.
1712 void ieee80211_remove_interfaces(struct ieee80211_local
*local
)
1714 struct ieee80211_sub_if_data
*sdata
, *tmp
;
1715 LIST_HEAD(unreg_list
);
1716 LIST_HEAD(wdev_list
);
1721 * Close all AP_VLAN interfaces first, as otherwise they
1722 * might be closed while the AP interface they belong to
1723 * is closed, causing unregister_netdevice_many() to crash.
1725 list_for_each_entry(sdata
, &local
->interfaces
, list
)
1726 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
1727 dev_close(sdata
->dev
);
1729 mutex_lock(&local
->iflist_mtx
);
1730 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
1731 list_del(&sdata
->list
);
1734 unregister_netdevice_queue(sdata
->dev
, &unreg_list
);
1736 list_add(&sdata
->list
, &wdev_list
);
1738 mutex_unlock(&local
->iflist_mtx
);
1739 unregister_netdevice_many(&unreg_list
);
1740 list_del(&unreg_list
);
1742 list_for_each_entry_safe(sdata
, tmp
, &wdev_list
, list
) {
1743 list_del(&sdata
->list
);
1744 cfg80211_unregister_wdev(&sdata
->wdev
);
1749 static int netdev_notify(struct notifier_block
*nb
,
1750 unsigned long state
,
1753 struct net_device
*dev
= ndev
;
1754 struct ieee80211_sub_if_data
*sdata
;
1756 if (state
!= NETDEV_CHANGENAME
)
1759 if (!dev
->ieee80211_ptr
|| !dev
->ieee80211_ptr
->wiphy
)
1762 if (dev
->ieee80211_ptr
->wiphy
->privid
!= mac80211_wiphy_privid
)
1765 sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
1767 memcpy(sdata
->name
, dev
->name
, IFNAMSIZ
);
1769 ieee80211_debugfs_rename_netdev(sdata
);
1773 static struct notifier_block mac80211_netdev_notifier
= {
1774 .notifier_call
= netdev_notify
,
1777 int ieee80211_iface_init(void)
1779 return register_netdevice_notifier(&mac80211_netdev_notifier
);
1782 void ieee80211_iface_exit(void)
1784 unregister_netdevice_notifier(&mac80211_netdev_notifier
);