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/kernel.h>
14 #include <linux/if_arp.h>
15 #include <linux/netdevice.h>
16 #include <linux/rtnetlink.h>
17 #include <net/mac80211.h>
18 #include <net/ieee80211_radiotap.h>
19 #include "ieee80211_i.h"
21 #include "debugfs_netdev.h"
24 #include "driver-ops.h"
28 * DOC: Interface list locking
30 * The interface list in each struct ieee80211_local is protected
33 * (1) modifications may only be done under the RTNL
34 * (2) modifications and readers are protected against each other by
36 * (3) modifications are done in an RCU manner so atomic readers
37 * can traverse the list in RCU-safe blocks.
39 * As a consequence, reads (traversals) of the list can be protected
40 * by either the RTNL, the iflist_mtx or RCU.
44 static int ieee80211_change_mtu(struct net_device
*dev
, int new_mtu
)
47 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
49 meshhdrlen
= (sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
) ? 5 : 0;
51 /* FIX: what would be proper limits for MTU?
52 * This interface uses 802.3 frames. */
54 new_mtu
> IEEE80211_MAX_DATA_LEN
- 24 - 6 - meshhdrlen
) {
58 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
59 printk(KERN_DEBUG
"%s: setting MTU %d\n", dev
->name
, new_mtu
);
60 #endif /* CONFIG_MAC80211_VERBOSE_DEBUG */
65 static inline int identical_mac_addr_allowed(int type1
, int type2
)
67 return type1
== NL80211_IFTYPE_MONITOR
||
68 type2
== NL80211_IFTYPE_MONITOR
||
69 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_WDS
) ||
70 (type1
== NL80211_IFTYPE_WDS
&&
71 (type2
== NL80211_IFTYPE_WDS
||
72 type2
== NL80211_IFTYPE_AP
)) ||
73 (type1
== NL80211_IFTYPE_AP
&& type2
== NL80211_IFTYPE_AP_VLAN
) ||
74 (type1
== NL80211_IFTYPE_AP_VLAN
&&
75 (type2
== NL80211_IFTYPE_AP
||
76 type2
== NL80211_IFTYPE_AP_VLAN
));
79 static int ieee80211_open(struct net_device
*dev
)
81 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
82 struct ieee80211_sub_if_data
*nsdata
;
83 struct ieee80211_local
*local
= sdata
->local
;
85 struct ieee80211_if_init_conf conf
;
88 u32 hw_reconf_flags
= 0;
89 u8 null_addr
[ETH_ALEN
] = {0};
91 /* fail early if user set an invalid address */
92 if (compare_ether_addr(dev
->dev_addr
, null_addr
) &&
93 !is_valid_ether_addr(dev
->dev_addr
))
94 return -EADDRNOTAVAIL
;
96 /* we hold the RTNL here so can safely walk the list */
97 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
98 struct net_device
*ndev
= nsdata
->dev
;
100 if (ndev
!= dev
&& netif_running(ndev
)) {
102 * Allow only a single IBSS interface to be up at any
103 * time. This is restricted because beacon distribution
104 * cannot work properly if both are in the same IBSS.
106 * To remove this restriction we'd have to disallow them
107 * from setting the same SSID on different IBSS interfaces
108 * belonging to the same hardware. Then, however, we're
109 * faced with having to adopt two different TSF timers...
111 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
&&
112 nsdata
->vif
.type
== NL80211_IFTYPE_ADHOC
)
116 * The remaining checks are only performed for interfaces
117 * with the same MAC address.
119 if (compare_ether_addr(dev
->dev_addr
, ndev
->dev_addr
))
123 * check whether it may have the same address
125 if (!identical_mac_addr_allowed(sdata
->vif
.type
,
130 * can only add VLANs to enabled APs
132 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
&&
133 nsdata
->vif
.type
== NL80211_IFTYPE_AP
)
134 sdata
->bss
= &nsdata
->u
.ap
;
138 switch (sdata
->vif
.type
) {
139 case NL80211_IFTYPE_WDS
:
140 if (!is_valid_ether_addr(sdata
->u
.wds
.remote_addr
))
143 case NL80211_IFTYPE_AP_VLAN
:
146 list_add(&sdata
->u
.vlan
.list
, &sdata
->bss
->vlans
);
148 case NL80211_IFTYPE_AP
:
149 sdata
->bss
= &sdata
->u
.ap
;
151 case NL80211_IFTYPE_MESH_POINT
:
152 if (!ieee80211_vif_is_mesh(&sdata
->vif
))
154 /* mesh ifaces must set allmulti to forward mcast traffic */
155 atomic_inc(&local
->iff_allmultis
);
157 case NL80211_IFTYPE_STATION
:
158 case NL80211_IFTYPE_MONITOR
:
159 case NL80211_IFTYPE_ADHOC
:
160 /* no special treatment */
162 case NL80211_IFTYPE_UNSPECIFIED
:
163 case __NL80211_IFTYPE_AFTER_LAST
:
169 if (local
->open_count
== 0) {
170 res
= drv_start(local
);
173 /* we're brought up, everything changes */
174 hw_reconf_flags
= ~0;
175 ieee80211_led_radio(local
, true);
179 * Check all interfaces and copy the hopefully now-present
180 * MAC address to those that have the special null one.
182 list_for_each_entry(nsdata
, &local
->interfaces
, list
) {
183 struct net_device
*ndev
= nsdata
->dev
;
186 * No need to check netif_running since we do not allow
187 * it to start up with this invalid address.
189 if (compare_ether_addr(null_addr
, ndev
->dev_addr
) == 0) {
190 memcpy(ndev
->dev_addr
,
191 local
->hw
.wiphy
->perm_addr
,
193 memcpy(ndev
->perm_addr
, ndev
->dev_addr
, ETH_ALEN
);
198 * Validate the MAC address for this device.
200 if (!is_valid_ether_addr(dev
->dev_addr
)) {
201 if (!local
->open_count
)
203 return -EADDRNOTAVAIL
;
206 switch (sdata
->vif
.type
) {
207 case NL80211_IFTYPE_AP_VLAN
:
208 /* no need to tell driver */
210 case NL80211_IFTYPE_MONITOR
:
211 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
212 local
->cooked_mntrs
++;
216 /* must be before the call to ieee80211_configure_filter */
218 if (local
->monitors
== 1) {
219 local
->hw
.conf
.flags
|= IEEE80211_CONF_MONITOR
;
220 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
223 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_FCSFAIL
)
224 local
->fif_fcsfail
++;
225 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_PLCPFAIL
)
226 local
->fif_plcpfail
++;
227 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_CONTROL
) {
228 local
->fif_control
++;
231 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_OTHER_BSS
)
232 local
->fif_other_bss
++;
234 ieee80211_configure_filter(local
);
237 conf
.vif
= &sdata
->vif
;
238 conf
.type
= sdata
->vif
.type
;
239 conf
.mac_addr
= dev
->dev_addr
;
240 res
= drv_add_interface(local
, &conf
);
244 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
245 local
->fif_other_bss
++;
246 ieee80211_configure_filter(local
);
248 ieee80211_start_mesh(sdata
);
249 } else if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
252 ieee80211_configure_filter(local
);
255 changed
|= ieee80211_reset_erp_info(sdata
);
256 ieee80211_bss_info_change_notify(sdata
, changed
);
257 ieee80211_enable_keys(sdata
);
259 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
260 netif_carrier_off(dev
);
262 netif_carrier_on(dev
);
265 if (sdata
->vif
.type
== NL80211_IFTYPE_WDS
) {
266 /* Create STA entry for the WDS peer */
267 sta
= sta_info_alloc(sdata
, sdata
->u
.wds
.remote_addr
,
271 goto err_del_interface
;
274 /* no locking required since STA is not live yet */
275 sta
->flags
|= WLAN_STA_AUTHORIZED
;
277 res
= sta_info_insert(sta
);
279 /* STA has been freed */
280 goto err_del_interface
;
285 * set_multicast_list will be invoked by the networking core
286 * which will check whether any increments here were done in
287 * error and sync them down to the hardware as filter flags.
289 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
290 atomic_inc(&local
->iff_allmultis
);
292 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
293 atomic_inc(&local
->iff_promiscs
);
295 hw_reconf_flags
|= __ieee80211_recalc_idle(local
);
298 if (hw_reconf_flags
) {
299 ieee80211_hw_config(local
, hw_reconf_flags
);
301 * set default queue parameters so drivers don't
302 * need to initialise the hardware if the hardware
303 * doesn't start up with sane defaults
305 ieee80211_set_wmm_default(sdata
);
308 ieee80211_recalc_ps(local
, -1);
311 * ieee80211_sta_work is disabled while network interface
312 * is down. Therefore, some configuration changes may not
313 * yet be effective. Trigger execution of ieee80211_sta_work
316 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
)
317 ieee80211_queue_work(&local
->hw
, &sdata
->u
.mgd
.work
);
319 netif_tx_start_all_queues(dev
);
323 drv_remove_interface(local
, &conf
);
325 if (!local
->open_count
)
329 if (sdata
->vif
.type
== NL80211_IFTYPE_AP_VLAN
)
330 list_del(&sdata
->u
.vlan
.list
);
334 static int ieee80211_stop(struct net_device
*dev
)
336 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
337 struct ieee80211_local
*local
= sdata
->local
;
338 struct ieee80211_if_init_conf conf
;
339 struct sta_info
*sta
;
341 struct sk_buff
*skb
, *tmp
;
342 u32 hw_reconf_flags
= 0;
346 * Stop TX on this interface first.
348 netif_tx_stop_all_queues(dev
);
351 * Now delete all active aggregation sessions.
355 list_for_each_entry_rcu(sta
, &local
->sta_list
, list
) {
356 if (sta
->sdata
== sdata
)
357 ieee80211_sta_tear_down_BA_sessions(sta
);
363 * Remove all stations associated with this interface.
365 * This must be done before calling ops->remove_interface()
366 * because otherwise we can later invoke ops->sta_notify()
367 * whenever the STAs are removed, and that invalidates driver
368 * assumptions about always getting a vif pointer that is valid
369 * (because if we remove a STA after ops->remove_interface()
370 * the driver will have removed the vif info already!)
372 * We could relax this and only unlink the stations from the
373 * hash table and list but keep them on a per-sdata list that
374 * will be inserted back again when the interface is brought
375 * up again, but I don't currently see a use case for that,
376 * except with WDS which gets a STA entry created when it is
379 sta_info_flush(local
, sdata
);
382 * Don't count this interface for promisc/allmulti while it
383 * is down. dev_mc_unsync() will invoke set_multicast_list
384 * on the master interface which will sync these down to the
385 * hardware as filter flags.
387 if (sdata
->flags
& IEEE80211_SDATA_ALLMULTI
)
388 atomic_dec(&local
->iff_allmultis
);
390 if (sdata
->flags
& IEEE80211_SDATA_PROMISC
)
391 atomic_dec(&local
->iff_promiscs
);
393 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
)
396 netif_addr_lock_bh(dev
);
397 spin_lock_bh(&local
->filter_lock
);
398 __dev_addr_unsync(&local
->mc_list
, &local
->mc_count
,
399 &dev
->mc_list
, &dev
->mc_count
);
400 spin_unlock_bh(&local
->filter_lock
);
401 netif_addr_unlock_bh(dev
);
403 ieee80211_configure_filter(local
);
405 del_timer_sync(&local
->dynamic_ps_timer
);
406 cancel_work_sync(&local
->dynamic_ps_enable_work
);
408 /* APs need special treatment */
409 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
) {
410 struct ieee80211_sub_if_data
*vlan
, *tmpsdata
;
411 struct beacon_data
*old_beacon
= sdata
->u
.ap
.beacon
;
414 rcu_assign_pointer(sdata
->u
.ap
.beacon
, NULL
);
418 /* down all dependent devices, that is VLANs */
419 list_for_each_entry_safe(vlan
, tmpsdata
, &sdata
->u
.ap
.vlans
,
421 dev_close(vlan
->dev
);
422 WARN_ON(!list_empty(&sdata
->u
.ap
.vlans
));
427 switch (sdata
->vif
.type
) {
428 case NL80211_IFTYPE_AP_VLAN
:
429 list_del(&sdata
->u
.vlan
.list
);
430 /* no need to tell driver */
432 case NL80211_IFTYPE_MONITOR
:
433 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_COOK_FRAMES
) {
434 local
->cooked_mntrs
--;
439 if (local
->monitors
== 0) {
440 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_MONITOR
;
441 hw_reconf_flags
|= IEEE80211_CONF_CHANGE_MONITOR
;
444 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_FCSFAIL
)
445 local
->fif_fcsfail
--;
446 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_PLCPFAIL
)
447 local
->fif_plcpfail
--;
448 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_CONTROL
) {
450 local
->fif_control
--;
452 if (sdata
->u
.mntr_flags
& MONITOR_FLAG_OTHER_BSS
)
453 local
->fif_other_bss
--;
455 ieee80211_configure_filter(local
);
457 case NL80211_IFTYPE_STATION
:
458 del_timer_sync(&sdata
->u
.mgd
.chswitch_timer
);
459 del_timer_sync(&sdata
->u
.mgd
.timer
);
460 del_timer_sync(&sdata
->u
.mgd
.conn_mon_timer
);
461 del_timer_sync(&sdata
->u
.mgd
.bcn_mon_timer
);
463 * If any of the timers fired while we waited for it, it will
464 * have queued its work. Now the work will be running again
465 * but will not rearm the timer again because it checks
466 * whether the interface is running, which, at this point,
469 cancel_work_sync(&sdata
->u
.mgd
.work
);
470 cancel_work_sync(&sdata
->u
.mgd
.chswitch_work
);
471 cancel_work_sync(&sdata
->u
.mgd
.monitor_work
);
472 cancel_work_sync(&sdata
->u
.mgd
.beacon_loss_work
);
475 * When we get here, the interface is marked down.
476 * Call synchronize_rcu() to wait for the RX path
477 * should it be using the interface and enqueuing
478 * frames at this very time on another CPU.
481 skb_queue_purge(&sdata
->u
.mgd
.skb_queue
);
483 case NL80211_IFTYPE_ADHOC
:
484 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
) {
485 del_timer_sync(&sdata
->u
.ibss
.timer
);
486 cancel_work_sync(&sdata
->u
.ibss
.work
);
488 skb_queue_purge(&sdata
->u
.ibss
.skb_queue
);
491 case NL80211_IFTYPE_MESH_POINT
:
492 if (ieee80211_vif_is_mesh(&sdata
->vif
)) {
493 /* other_bss and allmulti are always set on mesh
495 local
->fif_other_bss
--;
496 atomic_dec(&local
->iff_allmultis
);
498 ieee80211_configure_filter(local
);
500 ieee80211_stop_mesh(sdata
);
504 if (local
->scan_sdata
== sdata
)
505 ieee80211_scan_cancel(local
);
508 * Disable beaconing for AP and mesh, IBSS can't
509 * still be joined to a network at this point.
511 if (sdata
->vif
.type
== NL80211_IFTYPE_AP
||
512 sdata
->vif
.type
== NL80211_IFTYPE_MESH_POINT
) {
513 ieee80211_bss_info_change_notify(sdata
,
514 BSS_CHANGED_BEACON_ENABLED
);
517 conf
.vif
= &sdata
->vif
;
518 conf
.type
= sdata
->vif
.type
;
519 conf
.mac_addr
= dev
->dev_addr
;
520 /* disable all keys for as long as this netdev is down */
521 ieee80211_disable_keys(sdata
);
522 drv_remove_interface(local
, &conf
);
527 hw_reconf_flags
|= __ieee80211_recalc_idle(local
);
529 ieee80211_recalc_ps(local
, -1);
531 if (local
->open_count
== 0) {
532 ieee80211_clear_tx_pending(local
);
533 ieee80211_stop_device(local
);
535 /* no reconfiguring after stop! */
539 /* do after stop to avoid reconfiguring when we stop anyway */
541 ieee80211_hw_config(local
, hw_reconf_flags
);
543 spin_lock_irqsave(&local
->queue_stop_reason_lock
, flags
);
544 for (i
= 0; i
< IEEE80211_MAX_QUEUES
; i
++) {
545 skb_queue_walk_safe(&local
->pending
[i
], skb
, tmp
) {
546 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
547 if (info
->control
.vif
== &sdata
->vif
) {
548 __skb_unlink(skb
, &local
->pending
[i
]);
549 dev_kfree_skb_irq(skb
);
553 spin_unlock_irqrestore(&local
->queue_stop_reason_lock
, flags
);
558 static void ieee80211_set_multicast_list(struct net_device
*dev
)
560 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
561 struct ieee80211_local
*local
= sdata
->local
;
562 int allmulti
, promisc
, sdata_allmulti
, sdata_promisc
;
564 allmulti
= !!(dev
->flags
& IFF_ALLMULTI
);
565 promisc
= !!(dev
->flags
& IFF_PROMISC
);
566 sdata_allmulti
= !!(sdata
->flags
& IEEE80211_SDATA_ALLMULTI
);
567 sdata_promisc
= !!(sdata
->flags
& IEEE80211_SDATA_PROMISC
);
569 if (allmulti
!= sdata_allmulti
) {
570 if (dev
->flags
& IFF_ALLMULTI
)
571 atomic_inc(&local
->iff_allmultis
);
573 atomic_dec(&local
->iff_allmultis
);
574 sdata
->flags
^= IEEE80211_SDATA_ALLMULTI
;
577 if (promisc
!= sdata_promisc
) {
578 if (dev
->flags
& IFF_PROMISC
)
579 atomic_inc(&local
->iff_promiscs
);
581 atomic_dec(&local
->iff_promiscs
);
582 sdata
->flags
^= IEEE80211_SDATA_PROMISC
;
584 spin_lock_bh(&local
->filter_lock
);
585 __dev_addr_sync(&local
->mc_list
, &local
->mc_count
,
586 &dev
->mc_list
, &dev
->mc_count
);
587 spin_unlock_bh(&local
->filter_lock
);
588 ieee80211_queue_work(&local
->hw
, &local
->reconfig_filter
);
592 * Called when the netdev is removed or, by the code below, before
593 * the interface type changes.
595 static void ieee80211_teardown_sdata(struct net_device
*dev
)
597 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
598 struct ieee80211_local
*local
= sdata
->local
;
599 struct beacon_data
*beacon
;
604 /* free extra data */
605 ieee80211_free_keys(sdata
);
607 ieee80211_debugfs_remove_netdev(sdata
);
609 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
610 __skb_queue_purge(&sdata
->fragments
[i
].skb_list
);
611 sdata
->fragment_next
= 0;
613 switch (sdata
->vif
.type
) {
614 case NL80211_IFTYPE_AP
:
615 beacon
= sdata
->u
.ap
.beacon
;
616 rcu_assign_pointer(sdata
->u
.ap
.beacon
, NULL
);
620 while ((skb
= skb_dequeue(&sdata
->u
.ap
.ps_bc_buf
))) {
621 local
->total_ps_buffered
--;
626 case NL80211_IFTYPE_MESH_POINT
:
627 if (ieee80211_vif_is_mesh(&sdata
->vif
))
628 mesh_rmc_free(sdata
);
630 case NL80211_IFTYPE_ADHOC
:
631 if (WARN_ON(sdata
->u
.ibss
.presp
))
632 kfree_skb(sdata
->u
.ibss
.presp
);
634 case NL80211_IFTYPE_STATION
:
635 case NL80211_IFTYPE_WDS
:
636 case NL80211_IFTYPE_AP_VLAN
:
637 case NL80211_IFTYPE_MONITOR
:
639 case NL80211_IFTYPE_UNSPECIFIED
:
640 case __NL80211_IFTYPE_AFTER_LAST
:
645 flushed
= sta_info_flush(local
, sdata
);
649 static u16
ieee80211_netdev_select_queue(struct net_device
*dev
,
652 return ieee80211_select_queue(IEEE80211_DEV_TO_SUB_IF(dev
), skb
);
655 static const struct net_device_ops ieee80211_dataif_ops
= {
656 .ndo_open
= ieee80211_open
,
657 .ndo_stop
= ieee80211_stop
,
658 .ndo_uninit
= ieee80211_teardown_sdata
,
659 .ndo_start_xmit
= ieee80211_subif_start_xmit
,
660 .ndo_set_multicast_list
= ieee80211_set_multicast_list
,
661 .ndo_change_mtu
= ieee80211_change_mtu
,
662 .ndo_set_mac_address
= eth_mac_addr
,
663 .ndo_select_queue
= ieee80211_netdev_select_queue
,
666 static u16
ieee80211_monitor_select_queue(struct net_device
*dev
,
669 struct ieee80211_sub_if_data
*sdata
= IEEE80211_DEV_TO_SUB_IF(dev
);
670 struct ieee80211_local
*local
= sdata
->local
;
671 struct ieee80211_hdr
*hdr
;
672 struct ieee80211_radiotap_header
*rtap
= (void *)skb
->data
;
674 if (local
->hw
.queues
< 4)
678 skb
->len
< le16_to_cpu(rtap
->it_len
) + 2 /* frame control */)
679 return 0; /* doesn't matter, frame will be dropped */
681 hdr
= (void *)((u8
*)skb
->data
+ le16_to_cpu(rtap
->it_len
));
683 if (!ieee80211_is_data(hdr
->frame_control
)) {
685 return ieee802_1d_to_ac
[skb
->priority
];
689 return ieee80211_downgrade_queue(local
, skb
);
692 static const struct net_device_ops ieee80211_monitorif_ops
= {
693 .ndo_open
= ieee80211_open
,
694 .ndo_stop
= ieee80211_stop
,
695 .ndo_uninit
= ieee80211_teardown_sdata
,
696 .ndo_start_xmit
= ieee80211_monitor_start_xmit
,
697 .ndo_set_multicast_list
= ieee80211_set_multicast_list
,
698 .ndo_change_mtu
= ieee80211_change_mtu
,
699 .ndo_set_mac_address
= eth_mac_addr
,
700 .ndo_select_queue
= ieee80211_monitor_select_queue
,
703 static void ieee80211_if_setup(struct net_device
*dev
)
706 dev
->netdev_ops
= &ieee80211_dataif_ops
;
707 dev
->destructor
= free_netdev
;
711 * Helper function to initialise an interface to a specific type.
713 static void ieee80211_setup_sdata(struct ieee80211_sub_if_data
*sdata
,
714 enum nl80211_iftype type
)
716 /* clear type-dependent union */
717 memset(&sdata
->u
, 0, sizeof(sdata
->u
));
719 /* and set some type-dependent values */
720 sdata
->vif
.type
= type
;
721 sdata
->dev
->netdev_ops
= &ieee80211_dataif_ops
;
722 sdata
->wdev
.iftype
= type
;
724 /* only monitor differs */
725 sdata
->dev
->type
= ARPHRD_ETHER
;
728 case NL80211_IFTYPE_AP
:
729 skb_queue_head_init(&sdata
->u
.ap
.ps_bc_buf
);
730 INIT_LIST_HEAD(&sdata
->u
.ap
.vlans
);
732 case NL80211_IFTYPE_STATION
:
733 ieee80211_sta_setup_sdata(sdata
);
735 case NL80211_IFTYPE_ADHOC
:
736 ieee80211_ibss_setup_sdata(sdata
);
738 case NL80211_IFTYPE_MESH_POINT
:
739 if (ieee80211_vif_is_mesh(&sdata
->vif
))
740 ieee80211_mesh_init_sdata(sdata
);
742 case NL80211_IFTYPE_MONITOR
:
743 sdata
->dev
->type
= ARPHRD_IEEE80211_RADIOTAP
;
744 sdata
->dev
->netdev_ops
= &ieee80211_monitorif_ops
;
745 sdata
->u
.mntr_flags
= MONITOR_FLAG_CONTROL
|
746 MONITOR_FLAG_OTHER_BSS
;
748 case NL80211_IFTYPE_WDS
:
749 case NL80211_IFTYPE_AP_VLAN
:
751 case NL80211_IFTYPE_UNSPECIFIED
:
752 case __NL80211_IFTYPE_AFTER_LAST
:
757 ieee80211_debugfs_add_netdev(sdata
);
760 int ieee80211_if_change_type(struct ieee80211_sub_if_data
*sdata
,
761 enum nl80211_iftype type
)
765 if (type
== sdata
->vif
.type
)
768 /* Setting ad-hoc mode on non-IBSS channel is not supported. */
769 if (sdata
->local
->oper_channel
->flags
& IEEE80211_CHAN_NO_IBSS
&&
770 type
== NL80211_IFTYPE_ADHOC
)
774 * We could, here, on changes between IBSS/STA/MESH modes,
775 * invoke an MLME function instead that disassociates etc.
776 * and goes into the requested mode.
779 if (netif_running(sdata
->dev
))
782 /* Purge and reset type-dependent state. */
783 ieee80211_teardown_sdata(sdata
->dev
);
784 ieee80211_setup_sdata(sdata
, type
);
786 /* reset some values that shouldn't be kept across type changes */
787 sdata
->vif
.bss_conf
.basic_rates
=
788 ieee80211_mandatory_rates(sdata
->local
,
789 sdata
->local
->hw
.conf
.channel
->band
);
790 sdata
->drop_unencrypted
= 0;
791 if (type
== NL80211_IFTYPE_STATION
)
792 sdata
->u
.mgd
.use_4addr
= false;
797 int ieee80211_if_add(struct ieee80211_local
*local
, const char *name
,
798 struct net_device
**new_dev
, enum nl80211_iftype type
,
799 struct vif_params
*params
)
801 struct net_device
*ndev
;
802 struct ieee80211_sub_if_data
*sdata
= NULL
;
807 ndev
= alloc_netdev_mq(sizeof(*sdata
) + local
->hw
.vif_data_size
,
808 name
, ieee80211_if_setup
, local
->hw
.queues
);
811 dev_net_set(ndev
, wiphy_net(local
->hw
.wiphy
));
813 ndev
->needed_headroom
= local
->tx_headroom
+
814 4*6 /* four MAC addresses */
815 + 2 + 2 + 2 + 2 /* ctl, dur, seq, qos */
817 + 8 /* rfc1042/bridge tunnel */
818 - ETH_HLEN
/* ethernet hard_header_len */
819 + IEEE80211_ENCRYPT_HEADROOM
;
820 ndev
->needed_tailroom
= IEEE80211_ENCRYPT_TAILROOM
;
822 ret
= dev_alloc_name(ndev
, ndev
->name
);
826 memcpy(ndev
->dev_addr
, local
->hw
.wiphy
->perm_addr
, ETH_ALEN
);
827 memcpy(ndev
->perm_addr
, ndev
->dev_addr
, ETH_ALEN
);
828 SET_NETDEV_DEV(ndev
, wiphy_dev(local
->hw
.wiphy
));
830 /* don't use IEEE80211_DEV_TO_SUB_IF because it checks too much */
831 sdata
= netdev_priv(ndev
);
832 ndev
->ieee80211_ptr
= &sdata
->wdev
;
834 /* initialise type-independent data */
835 sdata
->wdev
.wiphy
= local
->hw
.wiphy
;
836 sdata
->local
= local
;
839 for (i
= 0; i
< IEEE80211_FRAGMENT_MAX
; i
++)
840 skb_queue_head_init(&sdata
->fragments
[i
].skb_list
);
842 INIT_LIST_HEAD(&sdata
->key_list
);
844 sdata
->force_unicast_rateidx
= -1;
845 sdata
->max_ratectrl_rateidx
= -1;
847 /* setup type-dependent data */
848 ieee80211_setup_sdata(sdata
, type
);
851 ndev
->ieee80211_ptr
->use_4addr
= params
->use_4addr
;
852 if (type
== NL80211_IFTYPE_STATION
)
853 sdata
->u
.mgd
.use_4addr
= params
->use_4addr
;
856 ret
= register_netdevice(ndev
);
860 if (ieee80211_vif_is_mesh(&sdata
->vif
) &&
861 params
&& params
->mesh_id_len
)
862 ieee80211_sdata_set_mesh_id(sdata
,
866 mutex_lock(&local
->iflist_mtx
);
867 list_add_tail_rcu(&sdata
->list
, &local
->interfaces
);
868 mutex_unlock(&local
->iflist_mtx
);
880 void ieee80211_if_remove(struct ieee80211_sub_if_data
*sdata
)
884 mutex_lock(&sdata
->local
->iflist_mtx
);
885 list_del_rcu(&sdata
->list
);
886 mutex_unlock(&sdata
->local
->iflist_mtx
);
889 unregister_netdevice(sdata
->dev
);
893 * Remove all interfaces, may only be called at hardware unregistration
894 * time because it doesn't do RCU-safe list removals.
896 void ieee80211_remove_interfaces(struct ieee80211_local
*local
)
898 struct ieee80211_sub_if_data
*sdata
, *tmp
;
899 LIST_HEAD(unreg_list
);
903 mutex_lock(&local
->iflist_mtx
);
904 list_for_each_entry_safe(sdata
, tmp
, &local
->interfaces
, list
) {
905 list_del(&sdata
->list
);
907 unregister_netdevice_queue(sdata
->dev
, &unreg_list
);
909 mutex_unlock(&local
->iflist_mtx
);
910 unregister_netdevice_many(&unreg_list
);
913 static u32
ieee80211_idle_off(struct ieee80211_local
*local
,
916 if (!(local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
))
919 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
920 printk(KERN_DEBUG
"%s: device no longer idle - %s\n",
921 wiphy_name(local
->hw
.wiphy
), reason
);
924 local
->hw
.conf
.flags
&= ~IEEE80211_CONF_IDLE
;
925 return IEEE80211_CONF_CHANGE_IDLE
;
928 static u32
ieee80211_idle_on(struct ieee80211_local
*local
)
930 if (local
->hw
.conf
.flags
& IEEE80211_CONF_IDLE
)
933 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG
934 printk(KERN_DEBUG
"%s: device now idle\n",
935 wiphy_name(local
->hw
.wiphy
));
938 local
->hw
.conf
.flags
|= IEEE80211_CONF_IDLE
;
939 return IEEE80211_CONF_CHANGE_IDLE
;
942 u32
__ieee80211_recalc_idle(struct ieee80211_local
*local
)
944 struct ieee80211_sub_if_data
*sdata
;
948 return ieee80211_idle_off(local
, "scanning");
950 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
951 if (!netif_running(sdata
->dev
))
953 /* do not count disabled managed interfaces */
954 if (sdata
->vif
.type
== NL80211_IFTYPE_STATION
&&
955 !sdata
->u
.mgd
.associated
&&
956 list_empty(&sdata
->u
.mgd
.work_list
))
958 /* do not count unused IBSS interfaces */
959 if (sdata
->vif
.type
== NL80211_IFTYPE_ADHOC
&&
960 !sdata
->u
.ibss
.ssid_len
)
962 /* count everything else */
967 return ieee80211_idle_on(local
);
969 return ieee80211_idle_off(local
, "in use");
974 void ieee80211_recalc_idle(struct ieee80211_local
*local
)
978 mutex_lock(&local
->iflist_mtx
);
979 chg
= __ieee80211_recalc_idle(local
);
980 mutex_unlock(&local
->iflist_mtx
);
982 ieee80211_hw_config(local
, chg
);